CN113812267B

CN113812267B - Combine harvester and threshing device mounted on the same

Info

Publication number: CN113812267B
Application number: CN202110943606.9A
Authority: CN
Inventors: 三井孝文; 福冈义刚
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2014-08-05
Filing date: 2015-07-06
Publication date: 2023-07-11
Anticipated expiration: 2035-07-06
Also published as: CN106455491B; CN110226415A; CN106455491A; WO2016021353A1; CN110226415B; CN113812267A

Abstract

The combine harvester has: a threshing device (8) for threshing the harvested cereal stalks; and a grain box (9) for storing grains obtained after threshing by the threshing device (8). The grain box (9) is located above the threshing device (8) and is supported on the machine body fixing part in a freely swinging and lifting mode around the horizontal axis by the operation of the hydraulic cylinder (41). The threshing device is provided with a linkage operation mechanism (R) which can open a threshing chamber of the threshing device (8) along with the rising swing of the grain box (9).

Description

Combine harvester and threshing device mounted on the same

This application is a divisional application of the following applications:

the invention name is as follows: combine harvester and threshing device loaded on the combine harvester are as follows: application number 2015, 7 month, 6 days: 201910456310.7

Technical Field

The present invention relates to a combine harvester and a threshing device mounted on the combine harvester.

Background

(1) There is a combine harvester having a threshing device for threshing the harvested stalks and a grain box for storing grains obtained by the threshing device, the grain box being located above the threshing device.

In this conventional combine harvester, a grain box located above a threshing device is rotatably supported by a body around a horizontal axis, and a posture is freely switched between a rising posture in which the grain box rises to a tilted posture for grain discharge and a falling posture for grain storage by a hydraulic cylinder. Then, in a state where the grain box is switched to the raised posture, a ceiling portion covering the upper portion of the threshing chamber of the threshing device is opened manually (for example, refer to patent document 1).

(2) A threshing device comprises a threshing chamber for threshing crops by a threshing cylinder and a receiving net which are driven by rotation, and a swing sorting device for sorting while transferring the objects to be treated leaked from the receiving net to the lower part.

In this conventional threshing device, the swing-type sorting device includes a grain tray located at the start end side in the transfer direction, a screen wire located at the downstream side in the transfer direction of the grain tray, and a chaff screen extending from a position below the screen wire to the downstream side in the transfer direction, inside a frame-shaped screen box. The screen line is formed in a substantially corrugated shape when viewed from the side and has a treated-material transfer function, and extends downstream in the transfer direction in a cantilever shape from the downstream end of the grain tray in the transfer direction in a state of being partially overlapped above the chaff screen (for example, see patent literature 2).

(3) A combine harvester is provided with a swing sorting device, wherein the swing sorting device is positioned below a threshing chamber and driven by a swing driving part to swing, and receives threshing objects leaked from the threshing chamber and separates grains from other objects while swinging and transferring the threshing objects.

In this conventional combine harvester, the swing driving unit for driving the swing sorting device has the following structure.

That is, a rotation shaft rotating around a lateral axis is supported on a side wall of the threshing device, and the swing sorting device is driven to swing by an eccentric cam type swing driving part driven by the rotation shaft. A swing arm supported by the fixed portion so as to be swingable is pivotally supported and coupled to the swing sorting device, and the swing arm and the swing driving portion are coupled to each other via a lateral coupling shaft, and are driven to swing by the swing driving portion. When the swing sorting device is attached to or detached from the threshing device, the lateral connecting shaft is pulled out to release the connection between the swing driving unit and the swing arm, or the connecting shaft is inserted to connect the swing driving unit and the swing arm (for example, refer to patent document 3).

(prior art literature)

(patent literature)

Patent document 1: japanese patent application publication No. 2014-018104 (JP 2014-018104A)

Patent document 2: japanese patent application publication No. 2014-014330 (JP 2014-014330A)

Patent document 3: japanese patent application publication No. 7-298765 (JPH 07-298765A)

Disclosure of Invention

(problem to be solved by the invention)

(1) The problems corresponding to the background art (1) are as follows.

In the above-described conventional structure, for example, when the interior of the threshing device is clogged and retained with the progress of the harvesting operation, it is necessary to manually switch the top plate portion of the threshing device to the raised posture after switching the grain bin to the raised posture, and to open the threshing chamber for inspection. The top plate of the threshing device is made of thicker metal plate, so that the threshing device is not damaged early due to abrasion caused by contact with the treated objects during threshing treatment of the threshing cylinder. As a result, the weight of the top plate portion is large, and the weight load of the opening operation of the top plate portion by the manual operation is large.

In addition, in the prior art, in order to reduce the weight load of the top plate portion, for example, an air damper is provided to assist the raising operation, however, in the case of a large threshing device, the assisting action of only 1 air damper is insufficient, and a burden on the labor is imposed on the operator. It is also conceivable to use a plurality of gas dampers, but an increase in the number of parts leads to an increase in cost.

Here, it is desirable that the maintenance work of the threshing device can be easily performed without increasing the cost.

(2) The problems corresponding to the background art (2) are as follows.

In the above-described conventional structure, the screen wires are provided so that the plurality of linear members extend in a cantilever manner, and the treated material leaked from the threshing chamber is subjected to the sorting process of separating the treated material by the screen wires by a specific gravity difference and separating the secondary material such as the grain and the grain with the branch while transferring the grass clippings backward. This reduces the burden of the treatment of the chaff sieve, and prevents the treated matter containing a large amount of grains from being deposited on the chaff sieve and discharged directly rearward, thereby causing a loss of a large amount of grains.

However, in the above-described conventional structure, the crop is threshed by the threshing cylinder which is rotatably driven in the threshing chamber, and the receiving net is provided only in a half-circumference portion of the lower side of the outer circumference portion of the threshing cylinder. According to the above configuration, the treated material carried by the threshing cylinder leaks along the upper half-circumference portion at the upstream side of the receiving net in the rotation direction of the threshing cylinder, and therefore a large amount of treated material leaks at the upstream side of the receiving net in the rotation direction compared to the downstream side of the receiving net in the rotation direction.

As a result, the treated material leaked from the threshing chamber leaks in a state of being biased against one side of the swing sorting device, and a large amount of treated material is present at one end portion in the width direction corresponding to the upstream portion in the rotation direction of the threshing cylinder, and the other end portion is small in amount and thin, thereby forming an unbalanced state.

In addition, when the screen wire and the chaff screen are moved rearward and secondary objects such as grains and grains with branch are leaked downward, and the thickness of the secondary objects is uneven in the width direction as described above, even if the entire amount of the processed objects supplied to the threshing device is an appropriate amount of the processed objects, a large amount of the processed objects are accumulated on the chaff screen at a portion where the processed objects are thick and discharged outward, and thus a large amount of grains are likely to be discharged, resulting in loss.

However, if a screen wire is not used, a screed for uniformly distributing the treated material in the width direction may be provided on the upper side of the grain tray, but the grain tray may transfer all the treated material rearward, resulting in a large treatment load of the chaff screen.

In this case, it is desirable to reduce the burden of processing of the chaff sieve by using a wire, and to equalize the amount of processed material on the swing sorting apparatus, thereby avoiding the loss caused by large-volume discharge of grains.

(3) The problems corresponding to the background art (3) are as follows.

In the above prior art, when the swing sorting apparatus is detached, the transverse connecting shaft needs to be detached or attached, and the attaching and detaching operations are difficult to perform. That is, when the swing sorting apparatus is taken out, the connecting shaft needs to be pulled out in the lateral direction while supporting the weight of the swing sorting apparatus by hand, which causes a large labor burden on the operator. In addition, when the swing sorting device is mounted, similarly, the weight of the rear side of the swing sorting device needs to be supported by hand while the swing driving unit and the swing arm are aligned, and a large labor load is imposed on the operator.

Accordingly, in order to solve the above-described problems, the following improved structure is considered.

The swing separation device and the swing drive unit are connected to each other at a connection portion, and each of the swing separation device and the swing drive unit has a first connection member integrally connected to the swing separation device and a second connection member detachably connected to the first connection member with the eccentric shaft portion interposed therebetween in a state in which the eccentric shaft portion is dispersed on both sides of the pivot support connection portion of the rotating eccentric shaft portion.

In this improved structure, the first connecting member can be temporarily supported by the eccentric shaft portion in the uncoupled state, and the eccentric shaft portion can be made to bear weight, so that the labor load in the attachment/detachment operation of the swing sorting apparatus can be reduced. However, in this structure, the following problems still remain.

Since the first connecting member and the second connecting member are formed so as to be spaced apart from each other with the eccentric shaft portion interposed therebetween, and therefore, there is a possibility that an extremely small step is formed at a portion where the eccentric shaft portion is connected with each other with respect to a circumferential direction due to an assembly error or the like during connection of the first connecting member and the second connecting member, and a gap is generated in accordance with a rotational movement. As a result, the gapped portions are damaged earlier with continued use, resulting in reduced durability.

In this case, it is desirable to provide a combine harvester which can reduce the labor burden in the attachment and detachment operation of the swing sorting device and can improve the durability.

(solution to problem)

(1) The solution corresponding to the problem (1) is as follows.

The combine harvester according to the invention is characterized in that,

the device comprises: threshing device, which performs threshing treatment to the harvested cereal stalks; and a grain box for storing grains obtained after threshing by the threshing device,

the grain box is positioned above the threshing device and is supported on the machine body fixing part in a mode of freely swinging and lifting around the horizontal axis through the operation of the actuator,

The combine harvester is provided with a linkage operating mechanism which swings along with the rising of the grain box to enable a threshing chamber of the threshing device to be opened.

According to the present invention, the grain box located above the threshing device can be swung up and down about the horizontal axis by the operation force of the actuator. When the grain box is moved up and down by the operation of the actuator, the threshing chamber of the threshing device is opened by the action of the interlocking operation mechanism.

That is, since the threshing chamber of the threshing device can be opened by the operating force of the actuator for swinging up the heavy grain box, the operator does not need to perform a complicated manual operation for opening the threshing chamber.

A special auxiliary mechanism for assisting a manual operation for opening the threshing chamber is not required, and a simple structure in which the grain box and a member covering the threshing chamber are interlocked can be employed as the interlocking operation mechanism. That is, by improving the structure with a simple structure, the maintenance work of the threshing device can be easily and simply performed.

Therefore, a combine harvester which does not cause an increase in cost and which can easily perform maintenance work of the threshing device can be provided.

In the present invention, preferably, the interlocking operation mechanism switches the threshing chamber to a closed state in response to the downward swing of the grain bin.

According to this configuration, when the grain tank is switched from the upward swing to the downward swing by the operation of the actuator, the threshing chamber is switched to the closed state in conjunction with this. That is, not only the opening operation of the threshing chamber can be performed in accordance with the raising operation of the grain bin, but also the closing operation of the threshing chamber can be performed in conjunction with the lowering operation of the grain bin, and thus the complexity of the maintenance work can be further reduced.

In the present invention, as a preferable example,

has a top plate part which is freely switched between a closed state of covering the upper part of the threshing chamber and closing the threshing chamber and an open state of opening the threshing chamber,

the interlocking operation mechanism has a connecting portion capable of interlocking the top plate portion and the grain box.

According to this configuration, when the grain tank is moved upward and downward by the operation of the actuator, the top plate portion linked to the grain tank is subsequently switched from the closed state to the open state via the linking portion.

The top plate part is a part covering the upper part of the threshing chamber, and can open and close the threshing chamber by the action of vertical direction corresponding to the lifting swing of the grain box. That is, the connecting portion can have a simple structure that is interlocked with the member operated in the substantially same direction.

In the present invention, as a preferable example,

the top plate is supported on the body fixing part in a free swinging and opening/closing mode around a swinging axis parallel to the horizontal axis,

the connecting portion is capable of interlocking and connecting a portion of the grain box opposite to the horizontal axis and a portion of the top plate opposite to the swing axis.

According to this configuration, the top plate and the grain box are each swingable and openable about parallel axes, and the swing end side portions can be interlocked and connected to each other by the connecting portion. That is, both swing around the parallel axes, not only simplifying the structure of the interlocking operation mechanism, but also enabling smooth and smooth interlocking operation.

In the present invention, preferably, the connecting portion may be connected to a swing-side end portion of the top plate portion on the opposite side of the swing axis.

According to this configuration, the connecting portion can be connected to the swing-side end portion of the top plate portion, and when the top plate portion swings upward in conjunction with the swing upward of the grain tank, the load applied to the connecting portion is smaller than when the top plate portion is connected to a position close to the swing axis, and thus the load can be reduced.

Therefore, by reducing the weight applied to the coupling portion, the structure of the coupling portion can be further simplified.

In the present invention, preferably, the connecting portion may be connected to a central portion of the top plate portion in the swing axis direction.

According to this configuration, since the connecting portion can be connected to the center portion of the top plate portion in the swing axis direction, that is, the center portion of the swing end portion in the width in the axis direction, the connecting portion can perform a swing operation satisfactorily without breaking the balance even if it is connected to only 1 portion.

Therefore, the structure of the connecting part can be simplified, and the grain box and the top plate can be well interlocked.

In the present invention, preferably, the connecting portion may be connected to a bottom frame provided at a bottom of the grain tank.

According to this structure, in order to store a large amount of grains, the bottom frame having a large supporting strength is provided at the bottom of the grain box, and the connecting portion can be connected by the bottom frame. That is, since the swing lever is coupled to the bottom frame having a high supporting strength, damage to the grain box due to the operation of the actuator can be reduced, and the swing operation can be stably performed for a long period of time.

In the present invention, preferably, the connecting portion has flexibility to shift the rising start time of the grain tank and the rising start time of the top plate portion.

According to this configuration, when the actuator starts the raising operation for raising the grain tank, after the actuator starts the raising operation, the raising operation starts when the raising start time of the grain tank is reached, and the raising swing of the grain tank starts from that time. Then, when the lift start time of the top plate portion is reached, the actuator continues the lift operation, and the top plate portion starts the lift operation from that time.

That is, when the grain tank is swung upward by a predetermined amount in response to the operation of the actuator, the top plate starts to rise, and therefore, the grain tank and the top plate can be interlocked with each other with an appropriate interval therebetween in the up-down direction.

As a result, the operation can be easily and satisfactorily performed without the adverse state that, for example, when the raising swing operation of the grain tank and the raising operation for opening the top plate portion are simultaneously performed, the interference of the two results in the interference of the operation and the like.

In the present invention, as a preferable example,

the connecting portion has: a first arm having one end rotatably supported by the grain tank; and a second arm having one end rotatably supported by the top plate and the other end rotatably coupled to the other end of the first arm,

In the lowered state of the grain box, the first arm and the second arm are folded, and the top plate starts to rise after the first arm and the second arm extend from the folded state as the grain box swings upward.

According to this configuration, when the grain box is positioned on the lower side and the top plate portion is in the closed state, the first arm and the second arm are stored in the folded state, and when the grain box starts to rise, the first arm and the second arm extend from the folded state. At this time, only the postures of the first arm and the second arm are changed, and the top plate portion does not rise. The first arm and the second arm are extended along with the rising of the grain box, and the posture of the first arm and the second arm is not changed, so that the top plate is lifted in conjunction with the rising of the grain box.

The first arm and the second arm are configured to allow flexibility in timing of the rise of the grain box and the timing of the rise of the top plate to be shifted from each other during a period from a state where the first arm and the second arm are folded to a state where the first arm and the second arm are extended.

Therefore, the grain box and the top plate can be interlocked and connected with each other with the rise start time being shifted by the connecting portion having a simple structure in which the 2 arms are pivotally supported and connected.

In the present invention, preferably, the connecting portion includes a rotation restricting portion that restricts relative rotation between the first arm and the second arm before the first arm and the second arm enter an extended state in which the first arm and the second arm are aligned when the first arm and the second arm are extended from a folded state.

According to this structure, when the first arm and the second arm are elongated from the folded state, the first arm and the second arm are restricted by the rotation restricting portion from entering the elongated state in which they are aligned. That is, when extended, the first arm and the second arm are not aligned in a straight line, but the posture is restricted before being aligned in a straight line.

As a result, when the folded state is returned from the extended state, the first arm and the second arm can be prevented from being bent in the opposite direction to the previous folded state, and the original state can be smoothly returned.

(2) The solution corresponding to the problem (2) is as follows.

The threshing device of the invention is characterized in that,

the device comprises: a threshing cylinder which is driven to rotate so as to perform threshing treatment on crops; the receiving net is arranged below the threshing cylinder; and a swing sorting device for sorting while transferring the processed objects leaked from the receiving net to the lower part,

the swing sorting device includes: a grain tray located at the start end side in the transfer direction; a sieve line positioned on the downstream side of the grain tray in the transfer direction; and a chaff sieve extending from a lower side portion of the sieve line to a downstream side in a transfer direction,

The chaff screen has a guide plate on an upper side thereof, and the guide plate guides the processed object oscillatingly transferred from the chaff screen from an upstream side to a downstream side in a rotation direction of the threshing cylinder in a width direction of the chaff screen.

According to the present invention, since the screen line is provided on the downstream side in the transporting direction of the grain tray, the treated material transported from the grain tray and the treated material directly leaked from the receiving net can be subjected to the specific gravity difference sorting by the screen line, and the secondary material such as the grain and the grain with the branch stalk can be leaked downward while transporting the grass clippings to the rear side for the sorting treatment, whereby the processing load of the chaff screen can be reduced.

The chaff screen is provided with a guide plate on an upper side thereof, and the processed product oscillated and transferred from the chaff screen is guided by the guide plate from an upstream side to a downstream side in a rotation direction of the threshing cylinder in a width direction of the chaff screen. The processed objects leaked from the receiving net to the swing sorting device in a state of being biased to one side are uniformly distributed in the width direction by the guiding action of the guiding plate, so that the thickness of the processed objects is equalized in the width direction.

Therefore, the threshing device can not only reduce the processing burden of the chaff sieve by using the sieve line, but also equalize the processing amount on the swing sorting device, thereby avoiding the loss caused by discharging a large amount of grains.

In the present invention, preferably, the guide plate is supported by a side plate of a screen box supporting the chaff screen.

According to this structure, the screen box is formed in a frame shape, and the chaff screen, other grain trays, screen wires, and the like are provided in the screen box, and the screen box is swung to sort the processed objects.

That is, the screen box has a strong structure for supporting the entire swing-type sorting device and swinging integrally, and the guide plate can be stably supported by the strong member.

In the present invention, it is preferable that the guide plate is provided at a position corresponding to a position on a downstream side of the chaff screen in the transporting direction.

According to this configuration, since the guide plate extends to a position of the chaff screen corresponding to the downstream side portion in the transfer direction, the processed product transferred from the chaff screen can be effectively applied to the processed product, and the processed product can be uniformly distributed in the width direction, so that the thickness of the processed product can be equalized.

In the present invention, it is preferable that the guide plate extends from a position corresponding to a position on a downstream side in the transfer direction of the screen wire to a downstream side in the transfer direction.

According to this configuration, even if the processed objects transferred from the screen line fall down, the processed objects are deposited on the lower side in a state of being offset to one side in the width direction, the thickness of the processed objects can be equalized by uniformly distributing the processed objects transferred from the chaff screen in the width direction by the guide plate extending from the lower side portion of the screen line to the downstream side in the transfer direction.

In the present invention, it is preferable that the guide plate extends downstream in the conveying direction from a position corresponding to a conveying direction end portion of the screen wire.

Since the treatment objects that are not carried and transferred by the screen wire leaking downward from the end portion in the transfer direction of the screen wire fall downward together, a large amount of treatment objects may be deposited at a portion corresponding to the end portion. However, in this configuration, since the guide plate extends downstream in the transfer direction from the portion of the screen wire corresponding to the transfer direction end portion, as described above, even if the treated object is lifted down, the treated object can be effectively distributed uniformly in the width direction by the guide plate, and the thickness of the treated object can be equalized.

In the present invention, it is preferable that a straw screen is provided on a downstream side in a conveying direction of the chaff screen, and the straw screen is supported on the downstream side in the conveying direction of the guide plate.

According to this structure, the treated material which is not dropped by the chaff screen is further transferred by the straw screen provided on the downstream side in the transfer direction by swinging, and the secondary material such as the grain and the grain with the branch stalk is dropped and sorted. The structure of the straw screen is effectively used to support the downstream side of the guide plate in the transfer direction.

Therefore, the guide plate can be supported by a simple supporting structure by effectively utilizing the members provided for the sorting process.

In the present invention, it is preferable that the straw screen is supported between right and left side plates of a screen box supporting the chaff screen, and the guide plate is supported at a central portion in a right and left direction of the straw screen.

According to this structure, the side plates supported by the screen box are stably supported on the left and right sides of the straw screen, and the guide plate is stably supported at the downstream side in the transfer direction at the center in the left and right direction of the straw screen.

The downstream side of the guide plate in the transfer direction is located at the center of the screen box in the lateral direction, and the guide plate applies a leveling action to the treated material in a half area of the receiving net in the lateral direction corresponding to the upstream side of the threshing cylinder in the rotation direction.

That is, the thickness of the treated material transferred from the chaff sieve can be equalized across the entire width in the left-right direction by uniformly distributing the treated material in the width direction at the upstream side in the rotation direction of the threshing cylinder where a large amount of the treated material leaks from the downstream side in the rotation direction.

In the present invention, preferably, the swing-type classifying device includes a windmill for supplying classifying wind,

A ventilation path is formed to guide the separation wind from the windmill so as to pass through a lower side portion of the screen wire and an upstream side portion of the guide plate in the transfer direction.

According to this configuration, since the separation wind from the windmill passes through the lower side portion of the screen line and the upstream side portion of the guide plate in the transfer direction, the separation wind can be applied to the processed product transferred from the screen line, and the processed product in a lump, such as grass clippings and grains with branch stalks, can be transferred to the chaff screen in a state where the processed product is mixed together and is decomposed as much as possible, whereby the processing load of the chaff screen can be further reduced.

In the present invention, preferably, the screen wire is constituted by a plurality of linear members extending in a cantilever shape, and the plurality of linear members include: a plurality of first linear members, the free end portions having a height; and a plurality of second linear members, the free end portions of which have a lower height than the first linear members.

According to this configuration, since the plurality of linear members constituting the screen wire include the first linear member and the second linear member having the free end portions with different heights, the falling distance of the processed object is longer in the portion of the height difference due to the swinging motion than the case where all the linear members are arranged with the same height, and the processed object can be easily decomposed.

In the present invention, it is preferable that the screen is formed in a substantially corrugated shape when viewed from the side.

In this structure, since the screen wire is formed into a substantially corrugated shape when viewed from the side, the screen wire has a function of transferring the placed processed object to the downstream side in the transfer direction by the swinging motion of the screen box, and thus, the processed object can be prevented from being accumulated in layers on the upper portion of the screen wire.

(3) The solution corresponding to the problem (3) is as follows.

The combine harvester according to the invention is characterized in that,

a threshing device for threshing crops supplied from a harvesting part in front of a machine body is provided with a swing sorting device which is positioned below a threshing chamber and is driven by a swing driving part in a swinging way to receive threshing objects leaked from the threshing chamber, and the threshing objects are separated into grains and other objects while being transferred in a swinging way,

the swing driving section includes:

an eccentric drive shaft having a rotation shaft portion that rotates around a transverse axis and an eccentric shaft portion that is eccentric with respect to the rotation shaft portion;

A connecting member extending from the swing sorting device; and

a bearing holder which is fitted over the eccentric shaft portion so as to be rotatable relative to each other via a bearing, and which is coupled to and uncoupled from the coupling member,

the bearing holder has a mounting support portion on which the coupling member can be mounted and supported.

According to the present invention, when the swing sorting apparatus is attached and detached, the attachment and detachment of the coupling member and the bearing holder can be achieved by releasing the coupling or coupling of both. When the above-described connection operation or disconnection operation is performed, the connection member is placed and supported on the placement support portion provided in the bearing holder, whereby the operation can be performed while bearing a part of the weight of the swing sorting device. That is, the loading and unloading operation of the swing sorting apparatus can be performed with less labor burden.

The bearing holder is rotatably fitted around the eccentric shaft portion via a bearing, and the portions in which the eccentric shaft portion is inserted can be integrally connected in the circumferential direction. That is, since the swing sorting device can be formed by machining with high precision over the entire circumference in the circumferential direction, the problem that a part of the swing sorting device is slightly stepped in the circumferential direction and looseness occurs due to the rotational movement can be reduced, and the swing sorting device can be driven to swing satisfactorily.

Therefore, it is possible to provide a combine harvester which can reduce the labor burden at the time of loading and unloading operations of the swing sorting device and can improve durability.

In the present invention, it is preferable that the bearing holder has a holder-side flange portion as the mounting support portion, the holder-side flange portion protruding radially outward from a cylindrical holding portion surrounding an outer periphery of the bearing,

the connecting member has a connecting member-side flange portion corresponding to the holder-side flange portion,

the holder-side flange portion and the coupling member-side flange portion are bolted together.

According to this configuration, when the coupling member and the bearing holder are coupled, the coupling member can be supported in a state in which the coupling member side flange portion is placed on the holder side flange portion. The flange portions of the two can be bolted together in a state where they overlap with each other.

Further, when the coupling member and the bearing holder are decoupled, the flanges of the coupling member and the bearing holder are decoupled from each other by the bolts. Even if the bolt connection is released, the connecting member side flange portion can be placed on the holder side flange portion, and the connecting member can be supported.

Therefore, by using the flange portion as the mounting support portion as the coupling member, the coupling operation and the coupling releasing operation of the coupling member and the bearing holder can be easily performed.

In the present invention, preferably, a fitting engagement portion for aligning the bearing holder and the coupling member is formed between them.

According to this configuration, when the uncoupled coupling member is placed and supported on the placement support portion of the bearing holder, the coupling member can be aligned in a state where the relative positions of the two are appropriate by the fitting engagement portion formed between the bearing holder and the coupling member.

Therefore, when the connecting member and the bearing holder are connected, the bearing holder that is externally fitted to the eccentric oscillating shaft can be positioned with high accuracy at a proper connecting position with respect to the connecting member, and the connecting operation can be easily performed.

In the present invention, it is preferable that the mounting support portion be provided in a plurality of positions offset in the circumferential direction of the bearing holder.

According to this configuration, the bearing holder can mount and support the connecting member regardless of which of the plurality of mounting support portions is provided at the offset position in the circumferential direction. That is, the bearing holder can mount and support any one of the plurality of mounting and supporting portions regardless of the phase of the coupling member that rotates around the axis of the eccentric shaft portion. As a result, the trouble of placing the bearing holder in alignment with a specific rotational phase and the like can be reduced.

As a result, when the swing classifying device is placed on and supported by the bearing holder, the state of heavy load of the swing classifying device can be maintained, and the bearing holder does not need to be aligned with a specific rotational phase or the like, so that the work can be easily performed.

In the present invention, it is preferable that the bearing holder has a cylindrical holding portion formed as an integrally molded product around an outer periphery of the bearing.

According to this configuration, since the cylindrical holding portion surrounding the outer periphery of the bearing is formed as an integrally molded product, the integrally molded product can be processed with high accuracy across the entire periphery, thereby forming a smooth circular inner peripheral surface. As a result, the bearing holder can form a smooth swinging motion along with the rotating motion at the position where the eccentric shaft portion is held in a freely rotatable state.

Therefore, the swing sorting device can be driven to swing well for a long period of time by forming a smooth swing motion in accordance with the rotational motion of the eccentric shaft portion.

In the present invention, as a preferable example,

a shredding device for shredding the discharged materials after threshing is arranged at the rear part of the threshing device,

the power of the engine is transmitted from the drive shaft to which the power of the engine is transmitted to the rotating shaft of the shredder via the relay propeller shaft,

The belt transmission mechanism connecting the relay transmission shaft and the rotation shaft is composed of a plurality of parallel transmission belts.

According to this structure, the discharged material after threshing in the threshing device is shredded by the shredding device and discharged outside the machine body. In order to chop the discharged material such as grass clippings, the chopper needs to rotate at a high speed, and therefore, in order to increase the rotational power of the belt transmission mechanism, the pulley on the output shaft side needs to be set to a small diameter.

As described above, when the pulley on the output shaft side is set to a small diameter and the pulley on the output shaft side is driven to rotate at a high speed, the transmission belt may slip. In this configuration, since power is transmitted from the relay transmission shaft to the output shaft via the plurality of transmission belts, it is possible to drive the vehicle at a high speed while avoiding slip.

In the present invention, it is preferable that the driven pulley on the relay transmission shaft side to which the power from the drive shaft is transmitted and the drive pulley on the relay transmission shaft side to which the power is transmitted to the rotation shaft are formed of 1 transmission rotating body integrally formed.

According to this configuration, the drive rotor is constituted by 1 drive rotor integrally formed with the driven pulley and the drive pulley provided in the relay drive shaft, and thus, the trouble of manufacturing the components and the trouble of assembling the drive rotor into the device can be reduced, and the cost can be reduced, as compared with the case where these pulleys are separately formed.

In the present invention, preferably, the drive shaft is a rotation shaft of a windmill provided in the threshing device.

According to this configuration, the power of the engine is transmitted to the rotation shaft of the windmill, and the windmill is rotationally driven. Power is transmitted from the rotation shaft of the windmill to the shredding device via the belt transmission device, and the shredding device is rotationally driven.

In order to generate the classifying wind, the windmill is driven to rotate at a higher speed than other devices of the threshing device. As described above, by effectively utilizing the power of the rotating shaft of the high-speed rotating windmill, the speed increasing ratio does not need to be excessively increased, and the shredder can be driven at high speed by the transmission mechanism having a simple structure.

Other structural features and the resulting benefits will become more apparent upon reading the following description with reference to the accompanying drawings.

In the following description, when the left-right direction is defined, the definition is made on the left or right side when viewed from the direction of travel of the machine body.

Drawings

Fig. 1 is a view showing a first embodiment (hereinafter, the same applies to fig. 9), and is an overall side view of a general combine as an example of the combine.

Fig. 2 is an overall plan view of a general type combine harvester.

Fig. 3 is a partially cut back view of a conventional combine harvester.

Fig. 4 is a rear view showing a supporting structure of the threshing device and the grain box.

Fig. 5 is a rear view of the grain tank in a state switched to the ascending and discharging posture.

Fig. 6 is a rear view showing an operation state of the interlocking operation mechanism.

Fig. 7 is an exploded perspective view of the interlocking operating mechanism.

Fig. 8 is a perspective view showing a connection state of the interlocking operation mechanism.

Fig. 9 is a perspective view showing a state of releasing the interlocking operation mechanism.

Fig. 10 is a view showing a second embodiment (hereinafter, the same applies to fig. 20), and is a longitudinal cross-sectional side view of the threshing device as a whole.

Fig. 11 is a longitudinal cross-sectional side view of the upstream side of the swing-sorting apparatus in the transfer direction.

Fig. 12 is a longitudinal cross-sectional side view of the downstream side in the transfer direction of the vibratory sorting apparatus.

Fig. 13 is a longitudinal cross-sectional side view of a transfer direction intermediate portion of the swing-type sorting apparatus.

Fig. 14 is a top view of the swing-sorting apparatus.

Fig. 15 is a plan view of the upstream side of the swing-type sorting apparatus in the transfer direction.

Fig. 16 is a plan view of the downstream side in the transfer direction of the swing sorting apparatus.

Fig. 17 is a front view of a chaff screen in longitudinal section.

Fig. 18 is a partial perspective view of a first screen wire and a second screen wire.

Fig. 19 is a side view showing a transmission configuration to the shredder.

Fig. 20 is a plan view showing a transmission structure of the shredder.

Fig. 21 is a view showing a third embodiment (hereinafter, the same applies to fig. 29), and is an overall side view of a general combine as an example of the combine.

Fig. 22 is an overall plan view of the general combine harvester.

Fig. 23 is a driveline diagram.

Fig. 24 is a longitudinal cross-sectional side view of the threshing device.

Fig. 25 is a longitudinal cross-sectional side view of the swing drive unit arrangement.

Fig. 26 is a longitudinal sectional rear view of the swing drive section.

Fig. 27 is a side view showing a coupled state of the coupling member and the bearing holder.

Fig. 28 is a side view showing a transmission configuration to the shredder.

Fig. 29 is a plan view showing a transmission structure of the shredder.

Detailed Description

(first embodiment)

First, a first embodiment will be described with reference to fig. 1 to 9.

The following describes a case of being applied to a general combine as an example of the combine.

(integral structure)

As shown in fig. 1 and 2, a general combine has a traveling body 3, and the traveling body 3 has a pair of left and right front wheels 1 that cannot be steered and a pair of left and right rear wheels 2 that can be steered. At the front part of the traveling machine body 3, a harvesting part 4 harvesting crops and carrying the crops backward is supported by a harvesting lift cylinder 5 so as to be driven to freely lift around a lateral fulcrum P1. The traveling machine body 3 further includes: a driving unit 7 located on the front side and covered by the driving cab 6 for the driver to ride on and off; a threshing device 8 for threshing the crop harvested by the harvesting unit 4; and a grain box 9 for storing grains obtained after threshing by the threshing device 8. The shredding device 12 is provided at the rear lower part of the threshing device 8, and the shredding device 12 shreds the discharged material (straw chips, etc.) after the threshing process by the threshing device 8 finely and discharges the shredded material to the outside of the machine body.

The harvesting unit 4 includes: a push-type harvesting knife 13 for cutting off the root of the crop for harvesting; a traverse screw 14 for collecting the harvested crop at a center portion in a harvesting width direction; the drum 15 is rotated to rake the top end of the ear of the crop to be harvested backward; and a feeder 16 for transporting the crop collected in the center to the threshing device 8 at the rear of the machine body.

In the feeder 16, a pair of left and right endless rotating chains 18 are wound around the feed box 17 in the shape of a cylinder in the front-rear direction, and conveying bodies 19 are provided at appropriate intervals in the circumferential direction so as to span the left and right endless rotating chains 18, and the conveying bodies 19 convey the crops transferred from the traverse screw 14 upward and rearward.

As shown in fig. 4 and 6, the threshing device 8 has a threshing cylinder 21 and a receiving net 22 for threshing the crop to be driven to rotate, on the upper side of the inner space surrounded by the left and right side walls 8A and the top plate 20, and a threshing chamber 23 is formed, and the threshing chamber 23 performs threshing on the harvested stalks carried by the harvesting unit 4. As shown in fig. 1, a sorting unit 24 is provided at the lower part of the threshing chamber 23, and the sorting unit 24 sorts the threshing processed product leaked from the threshing chamber 23 into grains, grass scraps, and the like.

The grains sorted by the sorting unit 24 are collected by the primary collection unit 25, and are transported to the grain box 9 located above the threshing device 8 via the transport belt 26 provided outside the threshing device, and are stored.

As shown in fig. 4 to 6, the top plate 20 is supported at the right end portion by a frame 28 so as to be capable of swinging about a swinging axis P2 along the longitudinal direction of the machine body via a pivot support connection portion 27, wherein the frame 28 serves as a machine body fixing portion provided on the upper portion of one side wall 8A of the threshing device 8, and the swinging end portion of the top plate 20 is fixed to the upper end portion of the other side wall 8A via a bolt.

When threshing is performed, the top plate 20 is fixed in a closed state by screwing and fixing the swing end portion with a plurality of bolts. On the other hand, when the threshing chamber 23 is clogged with straw or maintenance work such as repair inspection of the threshing cylinder 21 is performed, the top plate 20 is switched to the open state by unscrewing the bolt in order to open the threshing chamber 23.

(grain box)

Next, the grain box 9 will be described.

As shown in fig. 2 to 4, the grain box 9 is provided above the threshing device 8 so as to be located across the entire width or substantially the entire width of the traveling machine body 3. The grain tank 9 is supported by a bottom frame 29 at the bottom. The bottom frame 29 is formed by combining a plurality of front-rear facing frames and a plurality of lateral frames in a lattice shape, not shown in detail, and has a strong supporting strength.

The grain box 9 has: the bottom surface portion 9A is formed flat across substantially the entire surface; a peripheral wall portion 9B having a rectangular shape in a plan view, covering the front side, the rear side, the left side, and the right side, respectively; and an upper surface portion 9C covering the upper side of the storage space, wherein a grain storage space is formed in a region surrounded by the bottom surface portion 9A, the peripheral wall portion 9B, and the upper surface portion 9C. The upper surface 9C is formed in a shape that bulges upward from the center side when viewed in the front-rear direction.

A grain inlet 30 is formed in the front side of the peripheral wall 9B. The grains collected by the threshing device 8 are conveyed by the conveying belt 26, and are put into the grain box 9 through the grain input port 30 and stored. A wide grain outlet 31 is formed in a lower portion of the right side portion of the peripheral wall portion 9B so as to extend over substantially the entire width of the right side portion. Further, the cover member 32 is provided so as to be capable of closing the grain outlet 31 when storing grains and discharging grains to the outside when discharging grains. As described below, the shielding member 32 changes its posture in conjunction with the posture change of the grain box 9.

The grain box 9 is supported by a body frame 33 as a body fixing portion so as to be swingable up and down about a horizontal axis P3 extending in the front-rear direction of the body parallel to the swing axis P2 of the top plate 20.

That is, as shown in fig. 2 to 5, the right end of the grain box 9 is supported so as to swing up and down freely about the horizontal axis P3 via shaft support portions 34 provided on both front and rear sides. The front-rear shaft support 34 is composed of a support shaft 35 fixed to the body of the grain box 9 and facing forward and backward, and a bearing member 36 fitted to the support shaft 35 in a state allowing the support shaft 35 to rotate. The support shafts 35 of the front and rear shaft support portions 34 are fixed to the front end and rear end of a connecting roller portion 37 provided at the right end of the grain box 9.

As shown in fig. 4, the threshing device 8 has a support frame 38 on the lateral side, and the support frame 38 has a frame group structure connected to the machine frame 33 and the frame 28 of the threshing device 8. The bearing members 36 of the front and rear shaft support portions 34 are supported by an upper frame 39 of the support frame 38.

As described above, the grain box 9 is supported so as to swing up and down with respect to the traveling machine body 3 about the machine body forward-backward oriented horizontal axis P3 of the forward-backward support shaft 35. The horizontal axis P3 is located below the bottom surface 9A of the grain box 9 and above the threshing cylinder axis P4 of the threshing device 8.

The operated portion 40 is provided below a portion of the grain box 9 which is located on the right side of the center portion in the front-rear direction and the center portion in the left-right direction, and is supported by the bottom frame 29. The grain box 9 can be pivotally operated about the horizontal axis P3 between the lowered storage posture and the raised discharge posture by the box lifting cylinder 41 as an actuator coupled across the operated portion 40 and the support frame 38.

When the operated portion 40 is lowered by the tank lifting cylinder 41, the grain tank 9 is lowered and stored in a substantially horizontal posture with respect to the bottom surface portion 9A, as shown in fig. 4. In this lowered storage posture, the bottom surface 9A approaches the upper end of the top plate 20 of the threshing device 8.

When the grain box 9 is pulled up by the box lifting cylinder 41, the operated portion 40 is switched to an inclined posture in which the left side is located on the upper side and the right side is located on the lower side, that is, a raised discharge posture, as shown in fig. 5. In this upward discharge posture, the stored grains are discharged so as to naturally flow out from the grain discharge port 31 to the right lateral outside of the machine body.

(shielding member)

Next, the shielding member 32 will be described.

As shown in fig. 3 to 5, the shielding member 32 is supported at the lower end of the right lateral portion of the grain box 9 where the grain outlet 31 is formed so as to be swingable about the axis P5 directed forward and backward of the machine body. The shielding member 32 is configured to be freely changed between a storage posture for closing the grain outlet 31 as shown in fig. 4 and an open posture for opening the grain outlet 31 as shown in fig. 5.

The grain box 9 is interlocked with the shielding member 32 such that the shielding member 32 is switched to the storage posture when the grain box 9 is switched to the descending storage posture, and the shielding member 32 is switched to the open posture when the grain box 9 is switched to the ascending discharge posture.

That is, the cereal grain box 9 has the bending and stretching links 42 extending across the front and rear side portions of the shielding member 32, and the operating wire 43 is provided, and the operating wire 43 changes the posture by interlocking the shielding member 32 via the bending and stretching links 42 as the cereal grain box 9 is swung around the horizontal axis P3.

The bending and stretching link 42 includes a first link 42a on the grain box side and a second link 42b on the shielding member side, the end of the first link 42a being coupled to the grain box 9 so as to be free to swing, and the end of the second link 42b being coupled to the middle portion of the shielding member 32 in the up-down direction so as to be free to swing.

As shown in fig. 4, one end of the inner wire 43A of the operation wire 43 is connected to the middle portion of the first link 42a, the other end of the inner wire 43A is connected to the wire connecting piece 44, and the wire connecting piece 44 is integrally connected to the bottom frame 29 of the grain box 9. One end of the outer line 43B of the operation wire 43 is supported by a receiver 45 provided on a lateral side of the grain box 9, the other end of the outer line 43B is supported by a receiver 47, and the receiver 47 is provided on an upper end of a vertical frame 46 extending upward from the upper frame 39.

As shown in fig. 4, when the grain box 9 is switched to the lowered storage posture, the inner wire 43A is pulled, the first link 42a is swung inward, and the shielding member 32 is switched to the storage posture. Therefore, when the grain box 9 is switched to the lowered storage posture, the grain outlet 31 is closed, and the grains can be stored.

As shown in fig. 5, when the grain box 9 is switched to the ascending and discharging posture, the inner wire 43A is loosened, and the first link 42a swings to the outside of the machine body due to the weight of the shielding member 32 itself and the weight of the grain, and the shielding member 32 is switched to the open posture. At this time, the shielding member 32 is held in a posture substantially along the bottom surface 9A of the grain box 9 by the flexion and extension link 42 in the extended state. As a result, the grains located in the grain box 9 naturally flow, and thus the grains can be smoothly discharged from the grain outlet 31.

When the grain box 9 is in the lowered storage posture, the plurality of leg frames 48 provided on the grain box 9 side are supported from below by abutting against the upper surface of the frame member 49 on the body side at a portion of the bottom surface portion 9A of the grain box 9 opposite to the side where the shaft support portion 34 is located and at a portion close to the shaft support portion 34.

In the grain box 9, the bottom frame 29 is supported from below by a plurality of support frames 50 provided in a state extending upward from the top plate 20 of the threshing device 8 at a portion of the bottom surface portion 9A opposite to the side where the shaft support portion 34 is located and at a portion distant from the shaft support portion 34.

(linkage operating mechanism)

The threshing device is provided with a linkage operation mechanism R which can open the threshing chamber 23 of the threshing device 8 along with the rising and swinging of the grain box 9. The interlocking operation mechanism R has a connecting portion 51, and the connecting portion 51 interlockingly connects the top plate 20 covering the upper side of the threshing chamber 23 and the grain box 9.

As shown in fig. 1 and 2, the top plate 20 has a pair of connecting portions 51 located at the center in the swing axis direction, i.e., the front-rear direction of the machine body. As shown in fig. 3 to 6, the connecting portion 51 includes: a first arm 52 having one end rotatably supported by the grain box 9; the second arm 53 has one end rotatably supported by the top plate 20 and the other end rotatably coupled to the other end of the first arm 52.

As shown in fig. 6 to 8, one end of the first arm 52 is coupled to a locking bolt 54 at a portion of the grain box 9 opposite to the horizontal axis P3, and the locking bolt 54 is provided on the bottom frame 29. The first arm 52 is formed with an insertion hole 55 that is fitted over the locking bolt 54, and the insertion hole 55 is formed as a long hole along the arm longitudinal direction. With the above configuration, when the grain box 9 and the first arm 52 are interlocked and swung at different swing fulcrum positions, the operation can be smoothly performed without any particular torque.

A locking bolt 54 for connecting the first arm 52 to the bottom frame 29 is inserted through a support bracket 56 fixed to the bottom frame 29, and is screwed to a nut 57. The locking bolt 54 can be removed by releasing the screw from the nut 57.

One end of the second arm 53 is pivotally connected to a swing-side end of a portion opposite to the swing axis P2 of the top plate 20. That is, the locking lever 58 extends upward from the swing side end of the top plate 20, and the upper portion of the locking lever 58 is bent in an L-shape and has a lateral portion 58a. An insertion hole 59 formed at one end of the second arm 53 is fitted to the lateral portion 58a of the locking lever 58, and the second arm 53 is pivotally coupled to the locking lever so as to be swingable.

In the connecting portion 51, the first arm 52 and the second arm 53 are folded in a lowered state of the grain tank 9, and the first arm 52 and the second arm 53 are extended from the folded state as the grain tank 9 is raised and swung, and then the top plate 20 starts to rise. In the folded state, the

arms

52 and 53 are held in a state of being placed along the inclined surface 20a of the top plate 20.

According to this configuration, even if the grain box 9 is lifted up, the top plate 20 is not lifted up during the process of the first arm 52 and the second arm 53 moving from the folded state to the extended position, and therefore, the connecting portion 51 has flexibility to shift the lifting start time of the grain box 9 and the lifting start time of the top plate 20.

Further, the rotation restricting portion 60 is provided, and when the first arm 52 and the second arm 53 are extended from the folded state, the rotation restricting portion 60 restricts the relative rotation of the first arm 52 and the second arm 53 before the first arm 52 and the second arm 53 are extended in a line-like arrangement.

That is, as shown in fig. 7, the first arm 52 and the second arm 53 are each constituted by a band plate, and the first arm 52 and the second arm 53 are pivotally coupled by the relay pin 61 in a state where the plate surfaces overlap with each other. The end edge portion on the other end side of the second arm 53 is bent back into an L shape to form a rotation restricting portion 60. When the first arm 52 and the second arm 53 are extended, as shown by the broken lines in fig. 5 and 6, the end surface of the first arm 52 abuts on the rotation restricting portion 60, and the first arm 52 and the second arm 53 are restricted from extending in a straight line.

As shown in fig. 6, as the grain tank 9 is switched from the descending storage posture to the ascending discharge posture by the operation of the tank lifting cylinder 41, the grain tank 9 swings and the first arm 52 swings around the axis of the relay pin 61 while the grain tank 9 swings upward from the descending storage posture to the first set angle α1.

In the process of performing the upward swing of the grain box 9 beyond the first set angle α1 to the second set angle α2, the second arm 53 is swung upward about the axis of the locking lever 58 in addition to the swing of the grain box 9 and the accompanying upward swing of the first arm 52.

When the grain box 9 swings upward to the second set angle α2, the end surface of the first arm 52 abuts against the rotation restricting portion 60 formed in the second arm 53, and further relative swing displacement between the first arm 52 and the second arm 53 is restricted. Therefore, when the grain box 9 swings upward beyond the second set angle α2, the first arm 52 and the second arm 53 are integrally swung upward while maintaining the state in which the end surface of the first arm 52 is in contact with the rotation restricting portion 60 of the second arm 53, and the top plate 20 starts to swing upward. Then, the top plate 20 is integrally interlocked with the rising swing of the grain box 9, thereby performing the rising swing.

The rising swing angle of the top plate 20 is set to be large with respect to the rising swing angle of the grain box 9. For example, when the grain box 9 swings upward by about 40 degrees, the top plate 20 swings upward by about 45 degrees.

When the tank lifting cylinder 41 is switched from the state of swinging the grain tank 9 upward to the state of swinging the grain tank 9 downward, the top plate 20 swings downward to switch to the closed state of closing the upper part of the threshing chamber 23. As described above, when the top plate 20 is switched to the closed state, the swing end portion of the top plate 20 is fixed to the upper end portion of the side wall 8A by bolting.

When the top plate 20 is not moved up and down in conjunction with the up-and-down swinging operation of the grain box 9, the locking bolt 54 can be detached from the bottom frame 29, and the connecting portion 51 can be released from the state in which the grain box 9 and the top plate 20 are moved up and down in conjunction with each other.

When the connecting portion 51 is released from the state in which the grain box 9 and the top plate 20 are connected in a linked manner, the first arm 52 and the second arm 53 can be fixed to the top plate 20 by the locking bolt 54 to be held in position.

That is, as shown in fig. 8 and 9, the insertion holes 62 and 63 are formed so as to overlap each other in the folded state in the middle portion of the first arm 52 in the longitudinal direction and in the middle portion of the second arm 53 in the longitudinal direction. The top plate 20 has a support bracket 65 having an insertion hole 64 formed therein at a portion corresponding to the insertion holes 62, 63 of the

arms

52, 53 in the folded state. The first arm 52 and the second arm 53 can be screwed together and fixed to the support bracket 65 by the locking bolt 54 detached from the bottom frame 29.

Flexibility is provided at the pivot support connection portion of the first arm 52 and the second arm 53 by the relay pin 61, and a slight position change can be performed in the direction in which the first arm 52 and the second arm 53 approach and separate. In the folded state, the insertion hole 55 formed in the first arm 52 is fitted to the locking lever 58, so that the position can be held in a state where the first arm 52 and the second arm 53 overlap.

(other embodiments of the first embodiment)

(1) In the above embodiment, the one set of the coupling portions 51 is provided at the center portion in the swing axis direction of the top plate portion 20, but a plurality of coupling portions 51 may be provided at separate positions in the swing axis direction.

(2) In the above embodiment, the connecting portion 51 is connected to the swing side end portion of the top plate 20 on the opposite side of the swing axis P2, but may be connected to a position offset to the swing axis P2 side instead of the swing side end portion. (3) In the above embodiment, the connecting portion 51 is constituted by the pair of

arms

52, 53 pivotally connected, but various connecting structures such as a structure that is linked via an operation wire may be employed instead of this structure.

(4) In the above embodiment, the connection portion 51 is connected to the bottom frame 29 provided at the bottom of the grain tank 9, but may be directly connected to the bottom surface portion 9A of the grain tank 9 instead of the bottom frame 29, or may be connected to a flange portion if the tank is a tank having a flange portion.

(5) In the above embodiment, the linking operation mechanism R has the connecting portion 51, and the connecting portion 51 swings the top plate 20 of the threshing device 8 upward as the grain box 9 swings upward, but instead of this, the side wall 8A of the threshing device 8 may be opened or the entire covering portion of the threshing chamber 23 including the top plate 20 and the side wall 8A may be opened as the grain box 9 swings upward.

(6) In the above embodiment, the tank lift cylinder 41 constituted by a hydraulic cylinder is used as the actuator, but other various actuators such as an electric motor and a hydraulic motor may be used.

(7) In the above embodiments, the general type combine harvester is shown, but the present invention can be applied to a semi-feeding type combine harvester.

(second embodiment)

Next, a second embodiment will be described with reference to fig. 11 to 21.

Next, a case where the threshing device is applied to a threshing device of a general combine as an example of a combine will be described.

As shown in fig. 10, the threshing device has a threshing chamber 102 in an upper part thereof, a sorting unit 103 below the threshing chamber 102, and a threshing straw conveyed by a feeder 104 provided on a front side of the machine body and fed into the threshing chamber 102 from an inlet 105 at a front end thereof, in an inner space surrounded by side walls and a ceiling 101 on both sides not shown.

In the threshing chamber 102, a threshing cylinder 106 is provided, and the threshing cylinder 106 is driven to rotate around a horizontally oriented axis X1, thereby threshing the crop. The threshing cylinder 106 has a threshing cylinder shaft 110, and the threshing cylinder shaft 110 is rotatably supported between a front wall 108 and a rear wall 109 about a horizontally oriented axis X1, and the threshing cylinder 106 integrally rotates about the threshing cylinder shaft 110. The threshing cylinder shaft 110 is rotationally driven by power from an engine not shown. The threshing cylinder 106 is rotationally driven in a rightward (clockwise) rotation when viewed from the front of the machine body.

And, it has: a plurality of support plates 111 formed in a circular plate shape and integrally rotatably coupled to the threshing cylinder shaft 110; a plurality of support rods 112, which are disposed at equal intervals in a circumferential direction of the threshing cylinder 106 and are connected to the support plates 111; and rod-shaped threshing teeth 113 protruding from a plurality of positions arranged in the axial direction of the support rods 112 toward the outer periphery of the threshing cylinder 106.

The support rod 112 is formed of a circular tube. The threshing teeth 113 are formed of round bars, and are integrally connected and fixed by welding so as to penetrate the support rod 112 in the radial direction of the threshing cylinder 106.

Further, a receiving net 107 having an arc shape is provided at a lower half-circumference portion of the outer circumference portion of the threshing cylinder 106. Although not described in detail, the receiving net 107 is formed of a net body of a known structure in which a plurality of circular arc-shaped cross frames and longitudinal frames in the axial direction connecting the cross frames are connected to each other, and a plurality of through holes through which grains pass are formed. The top plate 101 of the threshing chamber 102 is provided with a dust feed valve 115, and the dust feed valve 115 moves and guides the treated material to the rear side (right side in fig. 10) in the rotation axis direction of the threshing cylinder 106 as the threshing cylinder 106 rotates.

As shown in fig. 10, the sorting unit 103 located below the threshing chamber 102 includes: a swing sorting device 116 for sorting while transferring the objects to be processed leaked from the receiving net 107 to the lower side; a primary material recovery unit 117 for recovering grains as primary materials leaked from the swing sorting device 116; a secondary material recovery unit 118 for recovering secondary materials such as the grain with the branch, which is leaked from the swing sorting device 116; and a windmill 119 for supplying the swing-type classifying device 116 with classifying wind.

The primary collection unit 117 conveys the collected grains to the outside of the threshing device on the lateral side by a lateral transfer screw unit 117 a. The grains collected by the primary collection unit 117 are transported to the outside of the lateral side of the threshing device, and then stored in a grain box, not shown, by a grain transport device, not shown.

The secondary product recovery unit 118 conveys the recovered secondary product to the outside of the threshing device on the lateral side by a lateral transfer screw 118 a. The secondary product collected by the secondary product collecting unit 118 is conveyed to the outside of the lateral side of the threshing device, and then returned to the threshing chamber 102 by the secondary product returning device 120 for threshing.

As shown in fig. 10, the swing classifying device 116 has a screen box 124 having a rectangular frame shape in a plan view, in which a guide roller 121 provided at a front portion side portion is slidably guided along an inclined guide rail 122 provided at a side wall of the threshing device, and the screen box 124 swings back and forth by an operation of a crank swing driving portion 123 provided at a rear portion lower side. The sieve box 124 includes a first grain tray 125, a second grain tray 126, a first sieve line 127, a second sieve line 128, a chaff sieve 129, a grain sieve 130, a plurality of straw sieves 131, and the like.

As shown in fig. 11 and 14, the first grain tray 125 is formed of a plate body having a substantially corrugated shape when viewed from the side, and is provided at an upstream end (front end) in the conveyance direction of the processed product of the swing sorting device 116, and conveys the processed product leaked from the upstream side in the conveyance direction of the threshing chamber 102 to the rear.

As shown in fig. 11 and 14, the first screen line 127 extends in a cantilever shape from the downstream end portion in the transfer direction of the first grain tray 125 to the downstream side in the transfer direction, and leaks grains and secondary materials downward while transferring the processed materials sent out from the first grain tray 125 rearward.

As shown in fig. 11 and 14, the second wire 128 extends in a cantilever shape from the downstream side in the transfer direction of the first wire 127 to the downstream side in the transfer direction, and the treated material sent from the first wire 127 is transferred backward while the grains and the secondary material are leaked downward.

The first screen wire 127 and the second screen wire 128 have substantially the same structure, and are constituted by a plurality of wire members 134 extending in a cantilever shape, and the plurality of wire members 134 include a plurality of first wire members 134a having a height of free ends and a plurality of second wire members 134b having a height of free ends lower than that of the first wire members 134 a. The linear members 134 are bent to have a substantially corrugated shape when viewed from the side.

Specifically, as shown in fig. 15 and 18, the wire members made of piano wire are bent into a substantially U-shape at the middle portion in the longitudinal direction, and 2 wire members 134 are formed into one group, and the 2 wire member groups 135 are mounted so that a plurality of groups are arranged in the lateral direction.

The linear member assemblies 135 located at both lateral end portions in the lateral direction have the same interval as the setting interval L of the linear members 134, and the bent base end side portions are fixed to the base end side fixing members 136 extending in the lateral direction. That is, the fixing is performed in a state of being pressed by the pressing plate 137 integrally fixed to the base end side fixing member 136.

The base end side fixing member 136 of the first wire 127 is bolted to the end of the first grain pan 125, and is bolted to the side support 138 that is coupled to the side plate 124A of the screen box 124. The base end side fixing member 136 of the second wire 128 is bolted to the side support 138.

The pressing plate 137 is provided so as to extend across substantially the entire width in the lateral direction, and is formed with an arc-shaped convex portion 137a covering the base end side portion of the linear member assembly 135 from above, and is welded and fixed to an appropriate portion in a state where the plate-shaped member 137b is in contact with the upper surface of the base end side fixing member 136. Thus, the linear member assembly 135 is supported while being cantilevered in a state of being held in a posture.

The plural sets of linear member assemblies 135 located at the middle except for the left and right end portions are bent into a substantially U-shape in a state having an interval of 2 times the set interval L between the linear members 134 in the assembled state, so that 2 sets of linear member assemblies 135 are formed. The plurality of groups of linear member assemblies 135 located in the middle are shifted from each other at half an interval in a state where the linear members 134 have a set interval L, and the 2 groups of linear member assemblies 135 are overlapped and fixed in a state where the base end side portion is pressed by the pressing plate 137. At this time, as shown in fig. 18, one set of the upper linear member set 135 among the 2 sets of the superimposed linear member sets 135 is set in a state where the height of the free end portion is higher than that of the lower linear member set 135.

Therefore, the linear member assemblies 135 located at both left and right side ends and the plurality of linear member assemblies 135 located at the lower side among the 2 overlapped linear member assemblies 135 are provided in a state where the height of the free end is low, and these linear members 134 constitute the second linear member 134b. Further, a plurality of upper linear member assemblies 135 among the 2 overlapped linear member assemblies 135 are provided in a state where the height of the upper linear member assembly 135 is higher than the height of the free end portion of the second linear member 134b, and these linear members 134 constitute the first linear member 134a.

The second cereal grain tray 126 is composed of a plate body formed in a substantially corrugated shape when viewed from the side, and is positioned downstream and below the first cereal grain tray 125 in the transfer direction, and transfers the processed objects leaking from the downstream side of the processed object transfer direction of the first cereal grain tray 125 and the processed objects leaking from the first screen line 127 to the rear.

The chaff sieve 129 is located on the downstream side in the transporting direction of the second cereal grain tray 126, and swings and transports the processed product sent from the second cereal grain tray 126, the processed product leaked from the first sieve line 127, and the processed product leaked from the receiving net 107 of the threshing chamber 102, while allowing cereal grains and secondary products to leak downward.

As shown in fig. 11 to 14, the chaff screen 129 is constituted by arranging a plurality of strip-shaped chaff lips 129A with spaces therebetween in the front-rear direction. Each chaff lip 129A is supported by a support plate 139 fixed to the screen box 124 so as to be swingable about a swing fulcrum P on the upper side. Further, the lower side portions of the respective chaff lips 129A are integrally connected by the operation plate 140, and the swing angle of the respective chaff lips 129A is changed by sliding the operation plate 140 in the front-rear direction by an angle adjusting mechanism (not shown), whereby the opening degree of the chaff lips 129A can be changed and adjusted (see the broken line of fig. 13).

As shown in fig. 13, the grain sieve 130 is composed of a corrugated wire mesh having a plurality of openings for passing grains, and is disposed below the chaff sieve 129 and supported by a front support member 141 and a rear support member 142, respectively, wherein the front support member 141 and the rear support member 142 are supported between the left and right side plates 124A of the sieve box 124. The grain sieve 130 swings and transfers the processed product leaked from the chaff sieve 129, and leaks grains to the primary product recovery section 117 below, and transfers the secondary product to the secondary product recovery section 118 on the downstream side in the transfer direction.

The straw screen 131 is located on the downstream side of the chaff screen 129 in the transfer direction, and 3 sets are provided so as to be displaced from each other in the up-down direction and the transfer direction. As shown in fig. 12, 14 and 16, each group of straw screens 131 is fixedly extended rearward in a cantilever-like manner by being connected to a bracket support body 143 so as to span the left and right side plates 124A of the screen box 124, and a plurality of transfer bracket plates 144 are provided at intervals in the left-right direction from the bracket support body 143. The transfer rack plate 144 is formed of a saw-toothed plate body, and is configured to receive and swing rearward to transfer the processed product.

The straw screen 131 having the above-described structure swings and transfers the processed objects supplied from the terminal end portion of the threshing chamber 102 and the terminal end portion of the chaff screen 129 to the rear, and leaks the processed objects to the lower secondary object collecting portion 118, and the processed objects such as the discharged straw that have not leaked are transferred to the shredding device 146 provided at the rear.

The following describes the drive configuration of the chopping device 146.

The power of the engine, not shown, is transmitted to the rotation shaft 162 of the windmill 119. As shown in fig. 19, a first drive pulley 164 is provided at the left end of the rotary shaft 162 of the wind turbine 119, and power is transmitted from the first drive pulley 164 to an input pulley 167 provided to the relay shaft 166 via a transmission belt 165. The relay shaft 166 has a lateral transfer screw 117a of the primary-material collecting unit 117, a lateral transfer screw 118a of the secondary-material collecting unit 118, and a conveying output pulley 170 that supplies power to the swing driving unit 123.

The power is transmitted from the conveying output pulley 170 to the primary product recovery unit 117 and the secondary product recovery unit 118 via the conveying belt 175. In the middle of the transmission of the conveying belt 175, a reversing pulley 176 for reversing the rotational power is provided, and the power is transmitted from the reversing pulley 176 to the swing driving portion 123 via the swing driving belt 177 and the input pulley 159.

The rotation shaft 162 of the windmill 119 has a second drive pulley 178 integrated with the first drive pulley 164, and power is transmitted from the second drive pulley 178 to the chopper apparatus 146. That is, as shown in fig. 20, power is transmitted from the second drive pulley 178 provided at the rotation shaft 162 of the windmill 119 to the driven pulley 181 provided at the relay transmission shaft 180 via the first belt transmission mechanism 182, wherein the relay transmission shaft 180 is located at the middle portion in the front-rear direction, and power is transmitted from the relay drive pulley 183 provided at the relay transmission shaft 180 to the driven pulley 185 provided at the rotation shaft 184 of the chopping device 146 via the second belt transmission mechanism 186.

In order to satisfactorily perform the shredding process by the shredding device 146, it is necessary to transmit high-speed power to the shredding device 146. Here, the driven pulley 181 provided in the relay transmission shaft 180 is formed to have a small diameter with respect to the second drive pulley 178, and the driven pulley 185 provided in the rotation shaft 184 is formed to have a small diameter with respect to the relay drive pulley 183 provided in the relay transmission shaft 180. That is, the rotational power of the rotation shaft 162 of the windmill 119 is increased in speed, and transmitted to the chopper device 146.

As shown in fig. 20, the driven pulley 181 and the relay drive pulley 183 are constituted by 1 transmission rotator 187 integrally formed. With the above configuration, the cost can be reduced by reducing the number of components and improving the assembling workability. The driven pulley 185 provided on the rotation shaft 184 is set to a small diameter as much as possible so that the increase rate can be increased without unnecessarily setting the second drive pulley 178 to a large diameter. The second belt transmission mechanism 186, which is the small-diameter driven pulley 185, transmits power from the intermediate transmission shaft 180 to the rotary shaft 184 of the chopper device 146 so as not to slip, is composed of 2 parallel belts.

As shown in fig. 10 and 11, a wind direction guide body 147 is provided below the swing classifying device 116, and the wind direction guide body 147 guides the classifying wind distribution supplied from the wind turbine 119 to: a first ventilation path Q1 for guiding the sorting air to the lower side of the chaff screen 129, a second ventilation path Q2 for guiding the sorting air to the lower side of the grain screen 130, and a third ventilation path Q3 for guiding the sorting air to the primary product recovery section 117.

As shown in fig. 10 and 13, the apparatus includes a guide plate 150, and the guide plate 150 is located on the upper side of the chaff screen 129 to guide the movement of the processed object oscillated and transferred from the chaff screen 129 in a direction intersecting with the transfer direction. The guide plate 150 is provided so as to extend from a lower side portion of the transfer direction terminal portion of the second screen wire 128 to a downstream side in the transfer direction.

As shown in fig. 17, the guide plate 150 is formed of a plate body having a substantially L-shaped cross-section, and the vertical surface portion 150a is formed with a guide surface for guiding the treatment object.

The upstream side portion of the guide plate 150 in the transfer direction is supported by the left side plate 124A of the screen box 124, and the downstream side portion of the guide plate 150 in the transfer direction is supported by the right-left center portion of the straw screen 131. That is, as shown in fig. 14, 15 and 16, the upstream end portion of the guide plate 150 in the transfer direction is bolted to the left side plate 124A of the screen box 124 fixed to the lower portion of the transfer direction terminal portion of the second screen wire 128. The downstream end portion of the guide plate 150 in the transfer direction is bolted to a transfer bracket plate 144 fixed to the center portion of the straw screen 131 located on the forefront side among the 3 groups of straw screens 131 in the lateral direction.

That is, the guide plate 150 moves the processed product from the lower side of the transfer direction terminal end portion of the second screen wire 128 to the downstream side in the transfer direction from the lateral side end portion of the receiving net 107 corresponding to the upstream side portion in the rotation direction of the threshing cylinder 106 to the other side gradually in the left-right direction on the upper side of the chaff screen 129, thereby equalizing the processed product on the chaff screen 129.

As shown in fig. 10 and 11, a wind direction guide body 151 is provided at an upper side portion of the wind turbine 119, a fourth wind passage Q4 is formed, and the fourth wind passage Q4 is ventilated and guided by the wind direction guide body 151 so that the sorting wind from the wind turbine 119 passes through a lower side portion of the first screen line 127 and the second screen line 128 and an upstream side portion of the guide plate 150 in the transfer direction.

With the above configuration, the separation wind generated by the wind turbine 119 not only decomposes the processed product leaked from the first screen line 127 and the second screen line 128, but also decomposes the processed product transferred from the first screen line 127 and the second screen line 128, so that the processing load of the chaff screen 129 can be reduced as much as possible. (other embodiments of the second embodiment)

(1) In the above embodiment, the first wire 127 and the second wire 128 are provided in a state of being aligned in the transfer direction, but may be constituted by 1 wire.

(2) In the above embodiment, the upstream side in the transfer direction of the guide plate 150 is supported by the side plate 124A of the screen box 124 and the downstream side in the transfer direction is supported by the straw screen 131, but instead of this, the upstream side in the transfer direction of the guide plate 150 may be supported by, for example, the chaff screen 129 other than the screen box, the downstream side in the transfer direction of the guide plate 150 may be supported by the screen box 124, and the supporting structure of the guide plate 150 may be variously changed.

(3) In the above embodiment, the screen wire has the plurality of first linear members 134a having the height of the free end portions and the plurality of second linear members 134b having the height of the free end portions lower than that of the first linear members 134a, but all the linear members may be provided at the same height instead of this structure. Further, the screen wire may be formed in a straight line instead of having a substantially corrugated structure when viewed from the side.

(4) In the above embodiment, the fourth air passage Q4 is formed, and the fourth air passage Q4 is not necessarily formed, so that the sorting air from the wind turbine 119 is guided to pass through the lower side portions of the

screen wires

127 and 128 and the guide plate 150 is guided to the upstream side portion in the transfer direction.

(5) In the above embodiment, the threshing device provided in the normal combine harvester is shown, but the threshing device may be a half-feed combine harvester.

(third embodiment)

Next, a third embodiment will be described.

Next, a case of being applied to a general combine harvester as an example of the combine harvester will be described with reference to fig. 21 to 29.

(integral structure)

As shown in fig. 21 and 22, the conventional combine harvester includes a traveling body 203, and the traveling body 203 includes a pair of left and right front wheels 201 that cannot be steered and a pair of left and right rear wheels 202 that can be steered. At the front part of the traveling body 203, a harvesting unit 204 that harvests the crop and conveys the crop backward is supported so as to be driven to move up and down around a lateral fulcrum P1 by a harvesting lifting cylinder 205. The traveling machine body 203 includes a driving unit 207, a threshing device 208, a grain box 209, and the like. The driver's cabin 207 is located on the front side and covered with the cab 206 for the driver to ride on. The threshing device 208 performs threshing processing on the crop harvested by the harvesting portion 204. The grain box 209 stores grains obtained by threshing by the threshing device 208. The shredder 212 is provided at the rear lower part of the threshing device 208, and the shredder 212 shreds the discharged material (straw chips, etc.) after the threshing process by the threshing device 208 and discharges the shredded material to the outside of the machine body.

The harvesting unit 204 includes: a clipper-type harvesting cutter 213 for cutting off the root of the crop to harvest; a traverse screw 214 for collecting the harvested crop at a central portion in the harvesting direction; rotating the drum 215 to rake the top side of the crop to be harvested backward; and a feeder 216 for transporting the crop collected in the center to the threshing device 208 at the rear of the machine body.

In the feeder 216, a pair of left and right endless rotating chains 218 are wound around a pair of right and left endless rotating chains 218 in a cylindrical feeding box 217 in the front-rear direction, and a carrier 219 is provided so as to be stretched between the left and right endless rotating chains 218 and so as to be spaced apart from each other in the circumferential direction, and the carrier 219 carries the crop transferred from the traverse screw 214 upward and rearward.

(threshing device)

Next, the threshing device 208 will be described.

As shown in fig. 24, the threshing device 208 includes a rotating threshing cylinder 223 and a receiving net 224 provided along the outer periphery thereof on the upper side of an inner space surrounded by a top plate 222 and left and right side walls 208A (see fig. 26), and a threshing chamber 225 for threshing the harvested stalks carried by the harvesting unit 204 is formed. The threshing chamber 225 has a sorting unit 226 at a lower portion thereof, and the sorting unit 226 sorts the threshing processed objects leaked from the threshing chamber 225 into grains, grass scraps, and the like.

The sorting unit 226 includes a swing sorting device 227, a windmill 228, a primary product recovery unit 229, a secondary product recovery unit 230, and the like. The swing sorting device 227 receives the processed objects leaked from the threshing chamber 225 and performs screening by a swing motion. Windmill 228 generates a classifying wind. The primary product recovery unit 229 recovers grains (primary products). The secondary product recovery unit 230 recovers secondary products such as grain with branch.

The device comprises: a primary screw 231 for transporting the grains collected by the primary collection unit 229 laterally outward of the right side of the threshing device 208; a slat conveyor type first grain conveying device 232 for conveying grains conveyed outward to the right by the primary screw 231 upward; and a spiral conveyor type second grain conveying device 233 that conveys the grains further upward from the conveying terminal portion of the first grain conveying device 232 and supplies the grains to the grain tank 209 (see fig. 21 and 22).

And, it has: a secondary screw 234 for transporting the secondary material collected by the secondary material collection unit 230 laterally outward of the right side of the threshing device 208; and a secondary product returning device 235 for returning the secondary product conveyed outward to the right by the secondary screw 234 to the swing sorting device 227.

The first grain conveying device 232 is provided in an inclined posture extending forward and upward from a position corresponding to the primary screw 231 to an upper portion of the threshing device 208 on the front side on the right side of the threshing device 208. Further, at the right side of the threshing device 208, the secondary product returning device 235 is provided in an inclined posture extending forward and upward from a position corresponding to the secondary screw 234 to the right side of the threshing device 208.

The swing classifying device 227 includes a screen box 237 having a rectangular frame shape in a plan view, and the screen box 237 swings back and forth by the operation of a crank swing drive unit 236 provided on the lower rear side. The screen box 237 includes a first grain tray 238, a second grain tray 239, a first screen line 240, a second screen line 241, a chaff screen 242, a grain screen 243, a plurality of straw screens 244, and the like. The first grain tray 238 transfers the treated material leaked from the upstream side of the threshing chamber 225 in the treated material transfer direction to the rear. The second grain tray 239 receives the processed product sent from the first grain tray 238 and transfers the processed product rearward. The first screen wire 240 is provided in a cantilever manner rearward Fang Ceyan in a state of being connected to the transfer direction terminal portion of the first cereal grain tray 238. The second wire 241 is provided in a cantilever manner rearward Fang Ceyan in a state of being connected to the transfer direction terminal portion of the first wire 240. The chaff screen 242 pre-sorts the processed product transferred from the second grain tray 239, the processed product leaked from the first screen line 240 and the second screen line 241, and the processed product leaked from the downstream side in the processed product transfer direction of the threshing chamber 225. The grain sieve 243 finely sorts the treated material leaked from the chaff sieve 242, and leaks grains (primary material) to the primary material recovery unit 229 below. The straw screen 244 swings and transfers the discharged straw supplied from the threshing chamber 225 and the chaff screen 242 backward, and drops the grains.

Next, the swing driving unit 236 of the swing-driving swing sorting device 227 will be described.

As shown in fig. 25 and 26, the swing driving section 236 includes: an eccentric drive shaft 246 having a rotation shaft portion 246A that rotates around a lateral axis and an eccentric shaft portion 246B that is eccentric with respect to the rotation shaft portion 246A; a connecting member 248 extending from the swing sorting device 227; and a bearing holder 250 which is fitted around the eccentric shaft portion 246B via a bearing 249 so as to be relatively rotatable, and which is coupled to and uncoupled from the coupling member 248.

Further, as described below, in a state where the side walls 208A on the left and right sides of the pellet removal device 208 are inserted, the pair of left and right rotation shaft portions 246A are supported so as to be rotatable about the same axis (lateral axis) P6 in the lateral direction. The eccentric drive shaft 246 is provided, and the eccentric drive shaft 246 has an eccentric shaft portion 246B eccentric to the rotating shaft portion 246A in a state of being integrally bridged and connected across the rotating shaft portions 246A on both the left and right sides. Accordingly, the eccentric drive shaft 246 rotatably spans the side walls 208A supported on the left and right sides.

The support bracket 251 is fixed in a state extending rearward and downward from the left and right side portions of the screen box 237 of the swing classifying device 227. Further, the coupling members 248 are fixed to the extending direction side end portions of the pair of support brackets 251.

As shown in fig. 25, 26 and 27, a plate-like coupling portion 248a is formed on the coupling member 248, and the plate-like coupling portion 248a is fastened and fixed to the support bracket 251 by screwing 3 portions on the front side, and a plate-like coupling portion 248a is formed on the rear side: a recess 248b into which the arc-shaped portion of the bearing holder 250 enters; and a pair of front and rear coupling member side flange portions 248c located on the front and rear sides of the recess 248b for coupling the bearing holder 250.

As shown in fig. 25, 26 and 27, the bearing holder 250 has: a substantially cylindrical holding portion 250a surrounding the outer periphery of the bearing 249; and a pair of holder-side flange portions 250b integrally extended in a state protruding radially outward from the holder portions 250 a. The pair of holder-side flange portions 250b integrally extend in a substantially linear manner radially outward with a substantially 180-degree phase difference provided at the outer peripheral portion of the holder portion 250 a.

The pair of holder-side flange portions 250b each have a predetermined thickness in a direction intersecting the extending direction (radial direction), and bolt insertion holes 253 through which the connecting bolts 252 are inserted are formed along the thickness direction. The front and rear pair of coupling member side flange portions 248c are formed with screw holes 254 for screwing the coupling bolts 252 at positions corresponding to the bolt insertion holes 253 of the holder side flange portions 250b, respectively.

As shown in fig. 27, when the coupling member 248 is coupled to the bearing holder 250, the coupling member 248 can be placed on the bearing holder 250 with the pair of front and rear coupling member side flange portions 248c and the pair of holder side flange portions 250b overlapped with each other while the circular arc-shaped projection 255 located on the upper side of the cylindrical holding portion 250a of the bearing holder 250 is fitted into the recess 248b of the coupling member 248.

Therefore, the pair of holder-side flange portions 250b constitute a mounting support portion S on which the connecting member 248 can be mounted and supported.

For example, when the swing classifying device 227 is mounted in the threshing device 208, the weight of the swing classifying device 227 can be temporarily borne by placing and supporting the bearing holder 250 externally fitted to the eccentric shaft portion 246B on the coupling member 248 coupled to the swing classifying device 227, thereby reducing the labor load.

A fitting engagement portion 256 for alignment is formed between the coupling member 248 and the bearing holder 250. That is, as shown in fig. 27, on the bearing holder 250 side, a positioning boss 257 is formed at a portion of the base end portion of the pair of holder-side flange portions 250b that resists the coupling member 248. On the other hand, on the coupling member 248 side, a positioning concave portion 258 is formed at a portion of the base end portion of the pair of coupling member side flange portions 248c that resists the bearing holder 250.

When the coupling member 248 is placed on the bearing holder 250, the positioning convex portion 257 is fitted into the positioning concave portion 258, so that the relative position between the coupling member 248 and the bearing holder 250 can be positioned at an appropriate coupling position (see fig. 25). Therefore, the convex portion 257 and the concave portion 258 constitute the fitting engagement portion 256.

In the above-described positioned state, the coupling member 248 is placed on the bearing holder 250, and the bolts 252 are inserted through the bolt insertion holes 253 from the lower side of the pair of holder-side flange portions 250b, so that the screw holes 254 formed in the coupling member-side flange portions 248c are screwed. The fixing and connecting member 248 and the bearing holder 250 are coupled by tightening the bolt 252. The bolt insertion hole 253 is set to an inner diameter slightly larger than the outer dimension of the bolt 252, so that an assembly error can be allowed.

The bearing holder 250 is formed in bilateral symmetry with a center line extending along the center of the holder-side flange portion 250B as viewed in the axial direction of the eccentric shaft portion 246B. Therefore, for example, even if the bearing holder 250 is rotated 180 degrees around the axis of the eccentric shaft portion 246B from the mounted state shown in fig. 27, the mounted state similar to the state shown in fig. 27 can be obtained. That is, the bearing holder 250 has a plurality of (2) mounting support portions S at different positions shifted by 180 degrees in the circumferential direction.

The coupling member 248 and the bearing holder 250 are each formed as an integrally molded product from a casting, and the portions where the members are connected to each other can be machined with high precision. In particular, the cylindrical holding portion 250a for holding the bearing 249 is formed into a circular inner peripheral surface with high accuracy by machining, and is free from looseness due to driving, thereby enabling smooth swing driving.

The transmission configuration will be described later. As shown in fig. 26, the left rotary shaft portion 246A of the left and right rotary shaft portions 246A has an input pulley 259 at an outer side portion of the side wall 208A, and power from the engine 210 is transmitted to the input pulley 259 to drive the eccentric drive shaft 246. When the eccentric drive shaft 246 rotates, the eccentric shaft 246B rotates around the axis P6 of the rotating shaft 246A, and the bearing holder 250 reciprocates up and down integrally with the coupling member 248, thereby driving the swing sorting device 227 to swing. The rotating shaft portions 246A on the left and right sides are provided with weight bodies BW for suppressing body vibration caused by driving of the swing sorting device 227 at outer side portions of the left and right side walls 208A.

(Transmission Structure)

Next, the driving structure will be described.

As shown in fig. 23, the power of the engine 210 is transmitted to the traveling input shaft 261 of the transmission case 260, and then transmitted from the traveling input shaft 261 to the input pulley 263, and the input pulley 263 is provided at the right end portion of the rotary shaft 262 serving as an intermediate shaft of the windmill 228.

A first drive pulley 264 is provided at the left end of the rotation shaft 262 of the windmill 228, and power is transmitted from the first drive pulley 264 to an input pulley 267 provided on the relay shaft 266 via a transmission belt 265. The relay shaft 266 has: an output pulley 268 for the threshing cylinder to supply power to the threshing cylinder 223; the feeder uses an output pulley 269 to power the feeder 216; and a conveying output pulley 270 that supplies power to the primary screw 231, the secondary screw 234, and the swing drive unit 236.

The power is transmitted from the threshing cylinder output pulley 268 to the transmission pulley 272 of the threshing cylinder 223 via the threshing cylinder transmission belt 271. Further, power is transmitted from the feeder output pulley 269 to a transmission pulley 274 to the feeder 216 via a feeder transmission belt 273. Not described in detail here, the power transmitted from the transmission pulley 274 to the feeder 216 is also transmitted to the harvesting blade 213, the traverse screw 214, and the like.

The power is transmitted from the conveying output pulley 270 to the primary screw 231 and the secondary screw 234 via the conveying belt 275. In the middle of the transmission of the conveying belt 275, a reversing pulley 276 for reversing the rotational power is provided, and the power is transmitted from the reversing pulley 276 to the swing driving unit 236 via a swing driving belt 277 and an input pulley 259.

The rotation shaft 262 of the windmill 228 has a second drive pulley 278 integrally formed with the first drive pulley 264, and power is transmitted from the second drive pulley 278 to the chopping device 212. That is, as shown in fig. 28 and 29, power is transmitted from the second drive pulley 278 provided to the rotation shaft 262 of the windmill 228 to the driven pulley 281 provided to the relay transmission shaft 280 located in the middle portion in the front-rear direction via the first belt transmission mechanism 282, and power is transmitted from the relay drive pulley 283 provided to the relay transmission shaft 280 to the driven pulley 285 provided to the rotation shaft 284 of the shredder device 212 via the second belt transmission mechanism 286.

In order to satisfactorily perform the shredding process by the shredding device 212, it is necessary to transmit high-speed power to the shredding device 212. Here, the driven pulley 281 provided on the relay transmission shaft 280 is formed to have a small diameter with respect to the second drive pulley 278, and the driven pulley 285 provided on the rotation shaft 284 is formed to have a small diameter with respect to the relay drive pulley 283 provided on the relay transmission shaft 280. That is, the rotational power of the rotation shaft 262 of the windmill 228 is transmitted to the chopper apparatus 212 at a higher speed.

As shown in fig. 29, the driven pulley 281 and the relay drive pulley 283 are constituted by 1 transmission rotation body 287 integrally formed. With the above configuration, cost reduction can be achieved by reducing the number of components, improving assembling workability, and the like.

In order to increase the rate of increase without unnecessarily setting the second drive pulley 278 to a large diameter, the driven pulley 285 provided on the rotary shaft 284 is set to a small diameter as much as possible. The second belt transmission mechanism 286 for transmitting power from the relay transmission shaft 280 to the rotary shaft 284 of the shredder 212 is composed of 2 parallel belts so that the small-diameter driven pulley 285 does not slip. The second belt transmission mechanism 286 is not limited to 2 belts, and may have 3 or more belts.

(other embodiments of the third embodiment)

(1) In the above embodiment, the pair of holder-side flange portions 250b constituting the mounting support portion S are integrally provided so as to be substantially linearly extended outward in the radial direction with a 180-degree phase difference therebetween, and 2 mounting support portions S are provided at different positions shifted in the circumferential direction by 180-degree phase, but the following configuration may be adopted instead.

The bearing holder 250 has 3 or more mounting support portions S at a plurality of positions shifted in the circumferential direction, and the plurality of mounting support portions are not limited to being equally distributed in the circumferential direction, but may be provided at mutually different positions in the circumferential direction. For example, the outer peripheral portion of the bearing holder 250 may have a plurality of concave portions or convex portions at positions offset in the circumferential direction, on which the support coupling member 248 can be placed.

(2) In the above embodiment, the fitting engagement portion 256 for alignment is formed between the bearing holder 250 and the coupling member 248, and the fitting engagement portion 256 may not be formed.

(3) In the above embodiment, the holder-side flange portion 250b constituting the mounting support portion S serves as a screw-on means with the coupling member 248, and the screw-on means between the bearing holder 250 and the coupling member 248 may be formed by a member different from the member constituting the mounting support portion S.

(4) In the above-described embodiment, the rotation shaft 262 of the windmill 228 is used as the drive shaft for power transmission of the crushing device 212, but instead of this, the rotation shaft of another device may be used as the drive shaft, and an intermediate shaft provided outside the threshing device may be used as the drive shaft.

(5) In the above embodiment, the driven pulley 281 and the relay drive pulley 283 are constituted by 1 transmission rotator 287 integrally formed, but the driven pulley 281 and the relay drive pulley 283 may be constituted by transmission structures formed separately.

(6) In the above embodiments, the general type combine harvester is shown as the combine harvester, and the present invention can be applied to the half-feed type combine harvester.

(industrial applicability)

The invention can be applied to combine harvesters such as common combine harvesters, semi-feeding combine harvesters and the like and threshing devices of the combine harvesters.

Description of the reference numerals

(first embodiment)

8: threshing device

20: top plate part

23: threshing chamber

26: cereal grain box

28: organism fixing part (frame)

29: bottom frame

33: organism fixing part (organism frame)

41: actuator

51: connecting part

52: first arm

53: second arm

60: rotation limiting part

P2: swing axle center

P3: horizontal axis

R: linkage operating mechanism

(second embodiment)

102: threshing chamber

106: threshing cylinder

107: receiving net

116: swing sorting device

119: windmill

124: screen box

124A: side plate

125: cereal tray

127. 128: screen line

129: screen box

131: straw screen

134: linear member

134a: first linear member

134b: second linear member

150: guide plate

Q4: ventilating passage

(third embodiment)

204: harvesting part

208: threshing device

210: engine with a motor

212: shredding device

225: threshing chamber

227: swing sorting device

228: windmill

236: swing driving part

246: eccentric driving shaft

246A: rotating shaft part

246B: eccentric shaft portion

248: connecting component

248c: connecting member side flange portion

249: bearing

250: bearing retainer

250a: holding part

250b: holder side flange portion

256: fitting engagement portion

262: driving shaft

280: relay transmission shaft

281: driven belt pulley

283: driving belt wheel

284: rotary shaft

286: belt transmission mechanism

287: transmission rotator

P6: transverse axis

S: mounting support

Claims

1. A threshing device is characterized in that,

a guide plate is provided on the upper side of the chaff screen, the guide plate guides the processed object which is swung and transferred from the chaff screen from the upstream side to the downstream side in the rotation direction of the threshing cylinder in the width direction of the chaff screen,

The guide plate extends from an upstream side of the chaff screen in the rotation direction of the threshing cylinder on a front side of the center in the conveying direction to a center in the width direction of a terminal end portion of the chaff screen in the conveying direction,

the upper end of the guide plate extends in the horizontal direction,

the width of the guide plate in the up-down direction is narrower as it is closer to the downstream side in the conveying direction of the chaff screen.

2. Threshing device as claimed in claim 1, characterized in that,

the guide plate has: a vertical surface portion forming a guide surface for guiding the treatment object; and a horizontal portion extending horizontally from an upper end portion of the vertical portion, wherein the guide plate is configured to have a substantially L-shaped cross section.

3. Threshing device as claimed in claim 2, characterized in that,

the horizontal portion extends outward in the width direction of the chaff screen from an upper end portion of the vertical portion.

4. A threshing device as claimed in any one of claims 1 to 3, characterized in that,

a straw screen is arranged at the downstream side of the chaff screen in the conveying direction,

the guide plate is supported by the straw screen at a downstream side in the transfer direction.

5. Threshing device as claimed in claim 4, characterized in that,

the straw screen frame is arranged between the left side plate and the right side plate of the screen box which supports the chaff screen,

The guide plate is supported at a central portion of the straw screen in the left-right direction.

6. A threshing device as claimed in any one of claims 1 to 3, characterized in that,

the guide plates are supported on side plates of a screen box supporting the chaff screen.

7. A threshing device as claimed in any one of claims 1 to 3, characterized in that,

the guide plate extends downstream in the transfer direction from a position corresponding to a downstream portion in the transfer direction of the screen wire.

8. Threshing device as claimed in claim 7, characterized in that,

the guide plate extends downstream in the conveying direction from a position corresponding to a conveying direction terminal portion of the screen wire.