JP2014068564A - Harvesting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a harvesting machine capable of simplifying a vehicle body support structure, while having sufficient support strength, even when a work device is provided on a lower part of the vehicle body.SOLUTION: A harvesting device is provided on a front part of a traveling vehicle body having a right and left pair of front wheels and a right and left pair of rear wheels. A vehicle body frame F for supporting the traveling vehicle body includes a right and left pair of front and rear-directed frame bodies 20 positioned on the right and left both sides and extended in the front-to-rear direction, a lateral frame body 50 for connecting the right and left pair of front and rear-directed frame bodies 20 on the rear side, and a rolling support mechanism 49 for supporting a rear axle case rockably around a front and rear-directed rolling shaft core. The rolling support mechanism 49 is supported by the lateral frame body 50 in the state of being positioned lower than the right and left pair of front and rear-directed frame bodies 20 and the lateral frame body 50.

Description

  The present invention relates to a harvesting machine in which a harvesting device is provided at a front portion of a traveling vehicle body having a pair of left and right front wheels and a pair of left and right rear wheels.

Conventionally, this type of harvester has been configured as follows.
That is, a body frame provided in the traveling vehicle body is provided with a substantially rectangular machine base in plan view for mounting and supporting main components constituting the vehicle body such as a driving part and a driving part, and downward from the machine base. The left and right rear wheels are supported by the machine base so that they cannot move up and down through a plurality of vertical frames that are integrally extended toward the front and the left and right front wheels are equipped with a link mechanism and a hydraulic cylinder. There is a configuration that is supported by a machine base so as to be movable up and down separately via an operation mechanism (for example, see Patent Document 1).

JP-A-61-215110

  In the harvesting machine having the above-described conventional configuration, a harvesting device is provided at the front part of the traveling vehicle body, and an elevating operation mechanism is provided at the front part of the vehicle body so as to support the front wheels on both the left and right sides in a vertically movable manner. The overall front / rear weight balance tends to be in the front weight state, and the front wheels and the rear wheels are supported through a plurality of vertical frame portions integrally extended downward from the machine base. The center of gravity of the entire aircraft was at a high position, and there was room for improvement in terms of running stability.

  An object of the present invention is to provide a harvester that can stably support a vehicle body at a low center of gravity and can improve the weight balance of the entire vehicle body. It is in.

  A feature of the present invention is that in a harvesting machine provided with a harvesting device at a front portion of a traveling vehicle body having a pair of left and right front wheels and a pair of left and right rear wheels, a vehicle body frame that supports the traveling vehicle body includes A pair of left and right front-rear frames positioned on both left and right sides and extending in the front-rear direction of the traveling vehicle body; a lateral frame body connecting the pair of left and right front-rear frames on the rear side of the traveling vehicle body; And a rolling support mechanism that swingably supports a rear axle case that supports the rear wheel around a rolling axis that extends in the front-rear direction. The rolling support mechanism includes the pair of left and right front-rear frame bodies and the lateral frame. In the state located below the body, it is supported by the lateral frame body.

  According to the present invention, the pair of left and right front / rear frames in the body frame are arranged in a state of being positioned on both the left and right sides of the traveling vehicle body and extending in the front / rear direction of the traveling vehicle body. The body can simply support main components of the traveling vehicle body such as the driving unit, the driving unit, and the working unit for harvesting.

  A rolling support mechanism that supports the rear axle case in a swingable manner around the rolling shaft core is supported by the lateral frame body in a state of being positioned below the pair of left and right front and rear frame bodies and the lateral frame body. Thus, as described above, a pair of left and right front-rear frame bodies that support the main components of the traveling vehicle body are provided at a low position, and the vehicle body frame can be supported at a low center of gravity. However, since a heavy harvesting device is provided at the front of the traveling vehicle body, it is easy to improve the front-rear weight balance of the entire body which tends to become a front weight.

  Accordingly, it has become possible to provide a harvesting machine that can simply support the vehicle body with a low center of gravity and can improve the front-rear weight balance of the entire vehicle body.

  In the present invention, a support bracket that protrudes downward is provided at a position on the vehicle body rear side of each of the pair of left and right front and rear frames, and the horizontal frame is constructed and connected across the left and right support brackets. It is preferable that

  According to this configuration, the horizontal frame body is installed between the left and right support brackets on which the load is applied, and even if force is applied to the left and right support brackets in an uneven manner, the force is distributed to the vehicle body frame. It is possible to reduce the application of excessive local force to the left and right pair of front and rear frame bodies.

  In the present invention, it is preferable that the support brackets on both the left and right sides are provided with an anti-sway portion that restricts the swinging motion in the front-rear direction while allowing the rolling operation of the rear axle case in the vertical direction.

  According to this configuration, the left and right support brackets for supporting the lateral frame body are effectively used to provide the steady rests, so that the pair of left and right front and rear frame bodies are separated from the support bracket. Therefore, it is possible to restrict the swinging motion of the rear axle case in the front-rear direction without complicating the structure such as providing a steadying member.

  In the present invention, it is preferable that the steady rest is integrally provided so as to protrude downward from each of the left and right support brackets.

  According to this configuration, using the empty space below the support bracket, the size in the front-rear direction and the left-right direction is increased compared to the case where the support bracket protrudes in the front-rear direction and the left-right direction, etc. The steady rest can be provided in a state without any disadvantage.

  In the present invention, the support bracket is constituted by a frame body having a rectangular cross section in a plan view and a shape in which an upper side portion is wide in a side view and narrows toward a lower side, and the steady rest It is preferable that the portion is configured by a plate body having a U-shaped cross section in a plan view and narrower toward the lower side in a side view in a state of being connected to the lower portion of the support bracket.

  According to this configuration, since the support bracket is configured by a frame body having a rectangular cross section in plan view, the support bracket has a high support strength. Since it is composed of a frame with a narrow shape, the lateral width in side view, i.e., the dimension in the longitudinal direction of the vehicle body is smaller on the lower side, and it is compact by avoiding interference with the steering cylinder The rear axle can be configured, and further, it is possible to easily avoid the disadvantages of contacting with external objects such as unevenness of the ground and a fence.

  By the way, when the rear axle case receives a swinging motion in the front-rear direction, the support strength can be improved by receiving a plurality of points separated in the vehicle body width direction. In a configuration in which a plurality of plate materials arranged in parallel and a connecting body that connects them are combined, it takes time to manufacture, but in this configuration, the steadying portion is configured by a U-shaped plate body in a plan view. Therefore, it is easy to process while ensuring the support strength and with less manufacturing effort.

  In addition, since the steady portion is connected to the lower portion of the support bracket, the upper portion is wider in the side view and narrower in the lower portion, so that the lateral dimension in the side view, that is, the dimension in the vehicle longitudinal direction is lower. It becomes so small that it is easy to avoid the disadvantage of contact with external objects such as unevenness of the ground and ridges.

  In the present invention, it is preferable that the pair of left and right front wheel drive cases for driving the pair of left and right front wheels are provided below the pair of left and right front and rear frames.

  According to this configuration, since the pair of left and right front wheel drive cases are provided at a low position, the vehicle body can be more easily supported at the low center of gravity by the vehicle body frame.

  In the present invention, each of the pair of left and right front wheel drive cases is separately connected and fixed to the lower surface side of the pair of left and right front-rear frames, and is installed horizontally on the pair of left and right front-rear frames. It is preferable that the front wheel drive cases are connected and fixed by a horizontally connected body.

  According to this configuration, since each of the pair of left and right front wheel drive cases is separately connected and fixed to the lower surface side of the pair of left and right front and rear frames, the load at the front side portion of the traveling vehicle body is It is received by a front wheel drive case that is connected and fixed to the lower surface side of the pair of left and right front and rear frame bodies through a facing frame body, and is favorably supported by a front wheel that is rotatably supported by the front wheel driving case. Will be.

  In addition, since the pair of left and right front wheel drive cases are connected and fixed by the laterally linking body laid horizontally on the pair of left and right front and rear frames, the pair of left and right front wheel drive cases are integrated to reinforce the support strength. be able to.

  In the present invention, it is preferable that each of the pair of left and right front wheel drive cases is connected and fixed to the bracket attached to the lower surface of each of the pair of left and right front and rear frames by screw fastening from above. .

  According to this configuration, when the front wheel drive case is attached to the front-rear frame body, the front wheel drive case can be connected and fixed to the bracket attached to the lower surface of each front-rear frame body by screw fastening from above. As a result, the front wheel drive case can be easily attached.

  In the present invention, it is preferable that attachment positions of the front wheel drive cases in the pair of left and right front and rear frame bodies are connected to each other by a front side lateral connection body.

  According to this configuration, since the pair of left and right front-rear frame bodies are connected by the front-side laterally connected body at the location where the load on the front side of the vehicle body tends to concentrate, the rigidity of the body frame can be increased.

  In the present invention, a transmission case that shifts and transmits power from the engine to the middle part of the pair of left and right front wheel drive cases and branches and transmits the power to the pair of left and right front wheel drive cases is provided. It is preferable that the pair of left and right front-rear frame bodies are provided with an erection support body installed horizontally, and the transmission case is supported by a support arm extending from the erection support body to the front side of the vehicle body. .

  In general, since the power from the engine is transmitted to the transmission case, the transmission case is positioned above the front wheel drive case, and a support body is installed horizontally on a pair of left and right front-rear frame bodies directly above the transmission case. Can not do it. However, with this configuration, the transmission case can be effectively supported by using the erection support body erected on the rear side of the vehicle body.

  In the present invention, it is preferable that the erection support body is connected and fixed to a pair of left and right brackets attached and fixed in a state of extending downward on the lower surfaces of the pair of left and right front and rear frames. is there.

  According to this configuration, the erection support body is supported in a balanced manner by the pair of left and right front-rear frames through the pair of left and right brackets, and the transmission case can be favorably supported by such a erection support body. .

  In the present invention, there is provided a residue processing device for processing residues left on the farm field between the front wheel and the rear wheel at a lower portion of the traveling vehicle body. It is preferable that it is supported by.

  According to this structure, the residue processing apparatus provided in the lower part of the traveling vehicle body between the front wheel and the rear wheel is supported by the construction support body. As described above, the erection support body is configured to serve as both the support of the mission case and the support of the residue processing apparatus, and the configuration can be simplified.

  In the present invention, an intermediate lateral connecting body that connects the pair of left and right front-rear frame bodies is provided behind the erection support body, and the residue processing device is driven to move up and down on the intermediate lateral connection body. It is preferable that the lifting cylinder to be supported is supported.

  According to this structure, the raising / lowering cylinder which drives up / down the residue processing apparatus is supported in the state supported by the intermediate | middle side direction coupling body provided in the back of the construction support body. Since the intermediate laterally connected body connects the pair of left and right front and rear frame bodies, it is firmly supported by the front and rear frame body. Therefore, with this configuration, the lifting cylinder can be supported in a stable state.

  In the present invention, a driving unit is provided at a front portion of the traveling vehicle body, and the driving unit frame that supports the driving unit extends in an upward direction from the pair of left and right front-rear frames. It is suitable if it is provided at the front part of the vehicle body.

  According to this configuration, since the driving unit located at the front of the traveling vehicle body is supported by the driving unit frame extending upward from the pair of left and right front-rear frames, the left and right pair supporting the entire vehicle body The driving part is stably supported by the front and rear frame body.

  In the present invention, a recovery unit that recovers the harvested object is provided at the rear of the traveling vehicle body, and the recovery unit frame that supports the recovery unit is positioned above the pair of left and right front-back frames. It is preferable to be provided at the rear part of the traveling vehicle body.

  According to this configuration, the collection unit that collects the harvested object is supported at the rear portion of the traveling vehicle body by the collection unit frame that is provided above the pair of left and right front-back frames. That is, the recovery unit is stably supported by a pair of left and right front and rear frames that support the entire vehicle body.

  In the present invention, between the front wheel and the rear wheel, it is located above the pair of front-rear frame bodies and projects outward from the pair of front-rear frame bodies on one side in the vehicle lateral width direction. In this state, it is preferable that an engine support frame for supporting the engine is provided.

  According to this configuration, the engine is supported by the engine support frame that is located above the pair of front-rear frame bodies and that protrudes outward from the pair of front-rear frame bodies to one side in the vehicle body width direction. Is done. That is, the engine is stably supported by a pair of left and right frame bodies that support the entire vehicle body.

  In the present invention, an engine is mounted and supported on an upper portion of the engine support frame portion, and is supported by a support frame erected from the engine support frame portion, and a radiator is provided in a state of being positioned above the engine. It is preferable that

  According to this configuration, the engine is stably mounted and supported on the upper part of the engine support frame part, and the radiator is compactly arranged using the space above the engine by the support frame standing from the engine support frame part. Can be made.

  In the present invention, between the front wheel and the rear wheel, it is positioned above the pair of front-rear frame bodies and projects outward from the pair of front-rear frame bodies on the other side in the vehicle lateral width direction. In this state, it is preferable that a fuel tank frame for supporting the fuel tank is provided.

  According to this configuration, the fuel tank frame portion that is located above the pair of front and rear frame bodies and is provided in a state of projecting outward from the pair of front and rear frame bodies on the other side in the vehicle body width direction, A fuel tank is supported. That is, the fuel tank is stably supported by a pair of left and right front and rear frames that support the entire vehicle body.

  In the present invention, a countershaft extending from one lateral side to the other lateral side of the traveling vehicle body and transmitting engine power to the harvesting device is provided in a state of being positioned below the pair of front and rear frame bodies. Preferably.

  According to this configuration, the power of the engine is transmitted to the harvesting device via the counter shaft that is provided in a state of being positioned below the pair of front-rear frame bodies. As described above, the counter shaft is provided using the space below the pair of front and rear frame bodies provided at a high position, and the upper side of the pair of front and rear frame bodies is restricted by the counter shaft. This makes it easy to arrange various devices in a compact manner.

It is a left view of a corn harvester. It is a top view of a corn harvester. It is a right view of a corn harvester. It is a top view which shows a vehicle body support structure. It is a side view of a body frame. It is a top view of a body frame. It is a front view of a vehicle body frame. It is a rear view of a vehicle body frame. It is a side view which shows the vehicle body support structure of a vehicle body front part. It is a top view which shows the vehicle body support structure of a vehicle body front part. It is a front view which shows the vehicle body support structure of a vehicle body front part. It is a top view of a front-wheel drive case support part. It is a partially cutaway front view of a front-wheel drive case support part. It is a side view which shows the vehicle body support structure of a vehicle body front-back intermediate part. It is the XV-XV sectional view taken on the line of FIG. It is a top view of a rear-wheel support part. It is a rear view of a rear-wheel support part. It is a disassembled perspective view of a rear-wheel support part. It is a top view of a counter-shaft support part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the corn harvester according to the present invention is located at the front of the traveling vehicle body 3 including a pair of left and right front wheels 1 and a pair of left and right rear wheels 2. A harvesting processing device 4 as a crop harvesting unit, a feeder 5 as a transport device extending in the front-rear direction from the rear of the harvesting processing device 4 to the upper side of the traveling vehicle body 3, and a recovery located at the rear of the traveling vehicle body 3 A recovery tank 6 as a part, and a residue processing device 7 located at the front and rear intermediate part between the front wheel 1 and the rear wheel 2 at the lower part of the traveling vehicle body 3.

  Corn forms tufts containing many seeds (fruits) at the harvesting time against the stems to be planted. The tufted portion includes a large number of seeds inside the foliage, and the seeds are formed in a form aligned with the outer surface of the rod-shaped core. The corn harvester according to the present invention harvests and collects a tuft having a large number of seeds inside a foliage as a harvesting target.

  That is, in this corn harvester, during the harvesting operation, the traveling vehicle body 3 is driven by driving the front wheels 1, and the harvested object harvested by the harvesting processing device 4 is conveyed toward the collection tank 6 by the feeder 5. It is stored in. Then, the stems left in the field at the time of harvest are shredded by the residue processing device 7. Although not described in detail, the residue processing device 7 is a hammer knife type shredding device that is driven and rotated around the horizontal axis, and shreds the stems left in the field during harvesting.

  The traveling vehicle body 3 is provided with a driving part 9 in a state where the upper part is covered with a cabin 8 at the front part of the vehicle body, and a driving part 10 is provided behind the driving part 9. The traveling vehicle body 3 is driven by a pair of left and right front wheels 1 fixed in the left-right direction and driven by an engine 11 provided in the prime mover 10. The rear wheel 2 is configured to be steerable by a hydraulically operated steering cylinder C1 (see FIG. 4).

  As shown in FIGS. 2 and 3, a boarding / alighting deck 12 and a boarding / alighting staircase 13 are provided on the lateral outer side of the left entrance of the cabin 8. The boarding / exiting stairs 13 can be switched between a use position located on the laterally outer side of the front wheel 1 and a retracted posture located on the rear side of the front wheel 1 by swinging around the vertical swing axis. ing.

  An auxiliary worker boarding deck 14 is provided in a lateral side portion of the traveling vehicle body 3 that is located on the left side of the feeder 5 with respect to the feeder 5, and the auxiliary worker boarding deck 14 is boarded by the auxiliary worker boarding deck 14. Auxiliary work such as monitoring the unloading status can be performed. The auxiliary worker boarding deck 14 is arranged such that the front end is located near the rear end of the boarding deck 12.

  The auxiliary worker boarding deck 14 is located above the fuel tank 15 for storing the fuel supplied to the engine 11, and has a cover function that covers the fuel tank 15. The prime mover 10 includes an engine 11, an engine cooling radiator 16, an intake case 17, an air cleaner 18 and a pre-cleaner 19 for intake of combustion air.

Next, the vehicle body frame F in the traveling vehicle body 3 will be described.
As shown in FIGS. 4 to 6, the vehicle body frame F of the traveling vehicle body 3 is located on both the left and right sides of the traveling vehicle body 3 as a main support for supporting the entire traveling vehicle body 3 and extends in the front-rear direction of the traveling vehicle body 3. A pair of left and right front-back frame bodies 20 that extend is provided. The pair of left and right front-rear frame bodies 20 are provided so as to extend over substantially the entire length in the front-rear direction from the front end portion to the rear end portion of the traveling vehicle body 3. The pair of left and right front-rear frame bodies 20 are integrally coupled by a plurality of lateral coupling members 21 extending along the lateral direction at each of the front part of the vehicle body, the rear part of the vehicle, and the middle part of the front and rear. Has been. Examples of the lateral connection member 21 include a front side lateral connection body 36, a construction support body 41, a lateral frame body 50, and an intermediate connection body 61, as will be described later.

  The vehicle body frame F that supports the entire traveling vehicle body 3 supports the driving unit 9, the engine 11, the fuel tank 15, the recovery tank 6, and the like in a state of being positioned on the upper side. That is, the vehicle body frame F includes a driving unit frame 23 that supports the driving unit 9, an engine support frame unit 24 for engine mounting support, and a fuel tank 15 in a state of being positioned on the upper side of the pair of left and right frame bodies 20. A support fuel tank frame 25 and a recovery unit frame 26 for supporting the recovery tank 6 are provided.

  The driving unit frame 23 supports the driving unit 9 and the cabin 8 surrounding the driving unit 9 from below. As shown in FIGS. 5 to 7 and FIG. A pair of left and right front struts 23a and a pair of left and right rear struts 23b are erected separately from the pair of left and right front and rear frame bodies 20, respectively. The driving unit frame 23 is connected to the upper ends of the front column 23a and the rear column 23b, and protrudes toward the front side of the vehicle with respect to the front column 23a. Is provided. Further, the lower end portions of the left and right front support columns 23a and the front end portions of the left and right front and rear support members 23c are connected by inclined support rods 23d in an oblique posture, and the upper and lower intermediate portions of the left and right rear support columns 23b are connected to each other. It is erected and connected by a lateral support 23e.

  As shown in FIGS. 1 and 9, the harvesting processing device 4 is swung around the horizontal axis P <b> 1 by the rotation support member 27 provided in the upper and lower middle portions of the pair of left and right front columns 23 a in the operation unit frame 23. It is supported freely and is configured to be driven up and down by a hydraulically operated lifting cylinder C2 supported at the lower part of the body frame F.

  As shown in FIGS. 5 to 7, the engine support frame portion 24 is positioned above the pair of front-rear frame bodies 20 between the front wheels 1 and the rear wheels 2, and is located on the right front-rear frame body 20. To the right side (an example of one side in the vehicle body width direction).

  In other words, the engine support frame portion 24 is supported on the upper side of the right front-rear frame body 20 and protrudes outward from the right front-rear frame body 20 to the right side. A body 24a, an intermediate lateral support 24b erected on the left and right front / rear frames 20, a rear lateral support 24c supported on the upper side of the right front / rear frame 20, A front-rear connecting body 24d that connects the right ends of the supports 24a and 24b is provided.

  Mount portions 24e on which the engine 11 is rubber-mounted are provided on the front side support 24a and the intermediate side support 24b. In addition, by adopting a configuration in which the intermediate lateral support 24b is mounted on the left and right front / rear frame 20, the cantilevered load of the engine support frame 24 provided in a state of projecting outward on the right side can be obtained. It can be supported in a state of being dispersed by the front and rear facing frame bodies 20 on both the left and right sides.

  As shown in FIG. 14, the radiator 16 and the intake case 17 are disposed above the engine 11 and are supported by a vertical support frame 24 f erected from the engine support frame portion 24. .

  As shown in FIG. 6, a fuel tank frame 25 for mounting and supporting the fuel tank 15 is provided in a state where the engine support frame portion 24 is located on the left side of the vehicle body. As will be described later, a rectangular tube-shaped intermediate sideways connecting body 28 laid horizontally along the upper surface of the pair of left and right front and rearward facing frame bodies 20 is provided in a state of projecting leftward. The fuel tank frame 25 includes a part of the intermediate side connecting body 28, a front side tank supporting body 25a, and a front and rear tank supporting body 25b that connects the left ends thereof. ing.

  As shown in FIG. 6, the recovery unit frame 26 is connected to the pair of left and right front and rear frame bodies 20 and is provided in a state of projecting outward in the lateral width direction on both sides, and a pair of front and rear side support bodies 26 a and 26 b. The front and rear support bodies 26c that connect the left and right ends of the pair of lateral support bodies 26a and 26b are configured to be wide so that the collection tank 6 can be placed and supported.

Next, the front wheel support structure will be described.
As shown in FIGS. 9 to 11, a pair of left and right front wheel drive cases 29 for driving the pair of left and right front wheels 1 are provided below the pair of left and right front-rear frame bodies 20. The front wheel drive case 29 includes a speed reduction mechanism (not shown) therein, and transmits the driving force transmitted through the transmission case 30 to the front wheel 1 by the speed reduction mechanism.

  Each of the pair of left and right front wheel drive cases 29 is connected and fixed to the bracket 31 attached and fixed to the lower surface of each of the pair of left and right front and rear frames 20 by screw fastening from above. If it demonstrates, as shown in FIG.12 and FIG.13, the bracket 31 for attachment is provided with the attachment surface 32 of a horizontal attitude | position in the state applied to the lower surface of the channel-shaped front-back direction frame body 20. As shown in FIG. A plurality of vertical ribs 33 are formed on the bracket 31 in a state where the bracket 31 is connected across the upper side of the mounting surface 32 and the vertical surface portions of the left and right sides of the front-rear frame body 20. A plurality of insertion holes 35 through which the fastening bolts 34 are inserted are formed.

  Then, as shown in FIG. 9, the connection portion of the front wheel drive case 29 is positioned on the lower surface side of the mounting surface 32 in the bracket 31, and the portion located on both the left and right sides of the front-rear frame body 20 in plan view. The front wheel drive case 29 is fixedly attached to the vehicle body frame F by fastening the bracket 31 and the front wheel drive case 29 with bolts 34 from above.

  As shown in FIG. 9 to FIG. 11, attachment positions of the front wheel drive case 29 in each of the pair of left and right front and rear frame bodies 20 are connected by a front side side connection body 36 that is a front side side connection member 21. Has been. The front-side laterally connecting body 36 has an inverted U-shaped cross section, and the left and right side end portions are connected and fixed to the vertical surface portions of the pair of left and right front-backward frame bodies 20. Further, as shown in FIGS. 12 and 13, a screw passage opening 37 is formed at a screw insertion portion through which the fastening bolt 34 is inserted.

  The lower portions of the front part of the pair of left and right front wheel drive cases 29 are connected and fixed by a laterally connecting body 38 so as to strengthen the strength. The laterally connecting body 38 is used to raise and lower the harvesting processing device 4. A support bracket 39 for pivotally connecting the rear side portion of the lift cylinder C2 to be operated is attached.

  As shown in FIGS. 10 and 11, the transmission case 30 is provided in the middle part of the pair of left and right front wheel drive cases 29 and is connected to the pair of left and right front wheel drive cases 29 via the connection case 40. Although not shown, the transmission case 30 shifts the power from the engine 11 and transmits it to the pair of left and right front wheel drive cases 29.

  Further, as shown in FIGS. 9 and 10, the installation support body 41 which is the second horizontal connecting member 21 from the front of the plurality of horizontal connecting members 21 is provided at a position on the vehicle body rear side of the mission case 30. The rear end portion of the transmission case 30 is supported by a support arm 42 that extends from the installation support body 41 toward the front side of the vehicle body.

  The erection support body 41 is composed of a round pipe-like member, and is attached to the lower surface of each of the pair of left and right front-rear frame bodies 20 via a pair of left and right brackets 43 that are fixedly attached in a state of extending downward. Connected and fixed. The bracket 43 is provided between a pair of left and right vertical surface portions 43a that are connected and fixed to both left and right end portions of the front and rear facing frame body 20 and extend downward, and is installed between the vertical surface portion 43a and the lower surface of the front and rear facing frame body 20. An inclined surface portion 43b connected and fixed over the outer peripheral surface of the support 41 is integrally fixed.

  Further, as shown in FIGS. 7 and 14, at the connecting portion between the right and left frame member 20 and the support frame 41, that is, at the portion corresponding to the lower side of the engine support frame portion 24, The reinforcing rib 44 is erected from the upper end portion of the erection support body 41. This reinforcing rib 44 is connected not only between the right and left front-facing frame body 20 and the construction support body 41 but also to the lower surface of the front side support body 24a in the engine support frame section 24, The entire body frame F is reinforced.

Next, the support structure of the residue processing apparatus 7 will be described.
As shown in FIG. 14, the residue processing device 7 is supported so as to be swingable up and down around the horizontal axis P2 with respect to the vehicle body frame F via a pair of left and right swing support members 45, and descends close to the ground. It is provided so as to be able to be lifted and lowered freely at a work position and a lifted non-working position that is elevated from the ground.

  That is, as shown in FIGS. 9 and 14, the pivot support shaft 46 of the pair of left and right swing support bodies 45 is rotatably supported by the pair of left and right brackets 43, and the pair of left and right swing support bodies 45 is swung. A residue processing device 7 is installed and supported between the moving end portions. Accordingly, the residue processing device 7 is supported by the pair of left and right brackets 43, that is, the vehicle body frame F, so as to swing up and down around the axis P <b> 2 of the rotation support shaft 46.

  As shown in FIGS. 6 and 14, on the vehicle body rear side of the erection support body 41, a rectangular tube-shaped intermediate side lateral coupling body 28 is laid sideways along the upper surface of the pair of left and right front and rear direction frame bodies 20, A hydraulically operated lifting cylinder C3 in a vertical orientation is provided at the center of the intermediate laterally connected body 28 in the vehicle width direction. Then, by the expansion / contraction operation of the elevating cylinder C3, the residue processing device 7 is configured to be capable of being driven up and down to a lowering work position and a non-lifting work position via an interlocking chain 47 for suspension.

Next, the rear wheel support structure will be described.
As shown in FIGS. 15 to 18, a rolling support mechanism 49 that supports a rear axle case 48 that supports a pair of left and right rear wheels 2 so as to be swingable around a rolling axis X <b> 1 in the front-rear direction is a pair of left and right front-rear directions. The frame 20 is supported by the horizontal frame 50 in a state of being positioned below the horizontal frame 50 that is the horizontal coupling member 21 positioned at the rear side of the vehicle body.

  Of each of the pair of left and right front and rear frame bodies 20, a support bracket 51 that protrudes downward is provided at a position on the rear side of the vehicle body where the pair of left and right rear wheels 2 are supported. The support brackets 51 are erected and connected across the left and right support brackets 51. A rolling support portion 52 is provided in a fixed state at the left and right intermediate portions of the lateral frame body 50, and the intermediate portion in the vehicle body width direction of the rear axle case 48 facing the vehicle body extends vertically around the rolling axis X1 facing the vehicle body front and rear. It is supported by the rolling support 52 so as to be swingable.

  As shown in FIGS. 17 and 18, the rolling support portion 52 includes a pair of left and right vertical support plates 52 a and an inverted U-shaped shaft that spans the lower end edges of the left and right support plates 52 a. A support member 52b and a vertical reinforcing plate 52c that connects the upper surface of the shaft support member 52b and the front and rear ends of the lateral frame body 50 are provided.

  A round pipe-shaped rear axle case 48 is provided across the left and right rear wheels 2, and then a cylindrical portion 48a integrally connected to the left and right intermediate portions of the axle case 48 is formed on the shaft support member 52b. A pair of front and rear is rotatably fitted to a fulcrum pin 52e that passes through the support boss portion 52d. Thus, the rear axle case 48 is supported by the vehicle body frame F so as to be rotatable around the axis X1 of the fulcrum pin 52e. A reinforcing rib 48b is formed across the rear axle case 48 and the cylinder portion 48a.

  The rear wheel 2 is supported on both left and right sides of the rear axle case 48 so as to be swingable around a longitudinal axis, and the steering cylinder C1 for steering the left and right rear wheels 2 swings integrally. Thus, the rear axle case 48 is supported. The steering cylinder C1 is supported by left and right support members 48c extending integrally from the rear axle case 48.

  As shown in FIGS. 15 to 18, the support brackets 51 provided on both the left and right sides include side plate members 51 a on both the left and right sides of a trapezoidal shape in which the upper side is wide and the lower side is narrow in side view, A front plate member 51b that connects the front side sides of the side plate members 51a on both sides, a rear plate member 51c that connects the rear side sides of the left and right side plate members 51a, a side plate member 51a on both the left and right sides, and a front plate member 51b and a bottom plate member 51d for connecting the lower sides of the rear plate member 51c, and these members are integrally connected. Therefore, the support bracket 51 is configured by a frame body having a rectangular cross-section in plan view and a shape in which the upper portion is wide in side view and narrower toward the lower side.

  Then, on the lower surface side of the bottom plate member 51d in each of the left and right support brackets 51, while allowing the rolling operation of the rear axle case 48 in the vertical direction, the rear axle case 48 is rolled at all positions in the vertical direction. An anti-sway part 53 that restricts the swinging motion in the front-rear direction is provided. The steady rest 53 is integrally provided so as to protrude downward from the left and right support brackets 51.

  As shown in FIGS. 15 to 18, the steady rest portion 53 has a U-shaped cross section in a plan view and a shape that becomes narrower in the lower side in a side view in a state of being connected to the lower portion of the support bracket 51. It consists of a plate. That is, the back-side steady-state portion 53 has a U-shape that opens rearward in a plan view, and the front-side steady-state portion 53 has a U-shape that opens forward in a plan view. As shown in FIG. 18, a receiving portion 54 for the rear axle case 48 is formed along the vertical direction at a position where the front and rear steady-state portions 53 face each other.

  By forming such a steady stop 53, the reaction force from the ground accompanying travel caused by unevenness of the ground or the like causes the back axle case 48 in the front-rear direction at the place supported by the fulcrum bracket 52. Even if a swinging force is applied, the swinging motion of the rear axle case 48 in the front-rear direction can be restricted.

  A counter shaft 55 is provided that extends from one lateral side to the other lateral side of the traveling vehicle body 3 and transmits the power of the engine 11 to the harvesting processing device 4. As shown in FIG. 3, the counter shaft 55 is provided at a central position in the front-rear direction of the pair of front-rear frame bodies 20 and positioned below the pair of front-rear frame bodies 20.

  As shown in FIG. 19, the counter shaft 55 includes an input pulley 56 that is integrally rotatable at an intermediate portion, and an output pulley 57 and an output sprocket 58 that are integrally rotatable at one end portion. A driving force from the engine 11 is input, and the input driving force is output from the output pulley 57 to the harvesting processing device 4 and output from the output sprocket 58 to the feeder 5. The counter shaft 55 is configured to transmit the input driving force from the other end portion to the residue processing device 7 via the transmission case 59.

  As shown in FIG. 19, a pair of left and right support plates 60 are fixedly extended rearward at the intermediate portion of the erection support body 41 in the vehicle body width direction, and the counter shaft 55 is rotated by the pair of support plates 60. It is supported freely. The rear portions of the pair of support plates 60 are fixedly supported by an intermediate connecting body 61 as a horizontal connecting member 21 on the intermediate portion side extending in a state of being fixed to the lower surface portions of the pair of front and rear facing frame bodies 20. Has been. Therefore, the counter shaft 55 can be stably supported by the pair of support plates 60.

  In this way, by effectively using the space on the lower side and providing the counter shaft 55 below the pair of front and rear frame bodies, the counter shaft 55 that is long in the lateral direction of the vehicle body allows a pair of front and rear directions. Various devices can be arranged in a compact manner without restricting the arrangement of the various devices at the upper part of the frame body 20.

[Another embodiment]
(1) In the above embodiment, the steadying portion 53 that restricts the swinging motion in the front-rear direction while allowing the rolling operation of the rear axle case 48 in the up-down direction is provided with a U-shaped cross section in plan view. However, instead of such a configuration, for example, the steadying portion 53 may be implemented in various forms such as a cylindrical shape, a rectangular bar shape, or the like. Also good. In addition, the rear axle case 48 may be in the shape of a square pipe so as to easily restrict the swinging motion in the front-rear direction.

(2) In the above-described embodiment, the support bracket 51 that supports the lateral frame body 50 has a shape in which the cross section in a plan view is rectangular, the upper portion is wider in a side view, and the width is narrower on the lower side. Although what was comprised with the frame was shown, it is not restricted to such a structure, The support bracket 51 is composed of a single plate material, or is a combination of a plurality of plate materials. Can be implemented.

(3) In the above embodiment, the pair of left and right front wheel drive cases 29 that respectively drive the pair of left and right front wheels 1 are screwed from above to the brackets 31 that are attached and fixed to the lower surfaces of the pair of left and right front and rear frames 20. Although it is set as the structure fixedly connected by fastening, it is not restricted to such a structure, You may implement by changing the attachment structure of the front-wheel drive case 29 variously.

(4) Although the harvesting unit that harvests corn has been described in the above embodiment, the harvesting unit is not limited to a corn harvesting machine, and may be a harvesting machine including a harvesting device that harvests various crops such as rice and wheat.

  The present invention can be applied to a harvester that harvests various crops such as corn, rice, and wheat.

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 3 Traveling vehicle body 4 Harvesting device 6 Collecting part 7 Residue processing device 9 Driving part 11 Engine 20 Front-rear frame 23 Driving part frame 24 Engine support frame part 24f Support frame 25 Fuel tank frame 26 Recovery part frame 28 Intermediate side laterally connected body 29 Front wheel drive case 30 Mission case 31 Bracket 36 Front side laterally connected body 38 Lateral laterally connected body 41 Construction support body 42 Support arm 43 Bracket 48 Rear axle case 49 Rolling support mechanism 50 Sideways frame body 51 Support bracket 53 Anti-sway part 55 Taunter shaft C2 Lifting cylinder F Body frame X1 Rolling shaft core

Claims (19)

A harvesting machine provided with a harvesting device at the front of a traveling vehicle body having a pair of left and right front wheels and a pair of left and right rear wheels,
A pair of left and right front-rear frames positioned on both left and right sides of the traveling vehicle body and extending in the front-rear direction of the traveling vehicle body, and the pair of left and right front-rear sides on the rear side of the traveling vehicle body, A horizontal frame body that connects the frame bodies, and a rolling support mechanism that swingably supports a rear axle case that supports the pair of left and right rear wheels around a rolling axis center in the front-rear direction;
The said rolling support mechanism is a harvester supported by the said horizontal frame body in the state located below the said left-right paired front-back frame body and the said horizontal frame body. A support bracket that protrudes downward is provided at a position on the vehicle body rear side of each of the pair of left and right front and rear frames.
The harvesting machine according to claim 1, wherein the horizontal frame body is constructed and connected over support brackets on both right and left sides.   The harvesting machine according to claim 2, wherein the left and right support brackets are provided with a steady portion for restricting a swinging motion in a front-rear direction while allowing a rolling operation in a vertical direction of the rear axle case.   The harvesting machine according to claim 3, wherein the steady rest is integrally provided in a state of projecting downward from each of the left and right support brackets. The support bracket is configured by a frame body having a rectangular shape in a plan view and a shape in which the upper side portion is wide in side view and narrower in the lower side,
The said steadying part is comprised by the plate body of the shape where the cross section by planar view is a U-shape, and becomes a width | variety narrower toward the downward side by the side view in the state connected to the lower part of the said support bracket. The harvester according to 3 or 4.   The pair of left and right front wheel drive cases for driving the pair of left and right front wheels, respectively, is provided in a state of being positioned below the pair of left and right front-rear frames. Harvester.   Each of the pair of left and right front wheel drive cases is separately connected and fixed to the lower surface side of the pair of left and right front-rear frames, and is a laterally-coupled body horizontally installed on the pair of left and right front-rear frames. The harvester according to claim 6, wherein the front wheel drive cases are connected and fixed.   The harvesting machine according to claim 7, wherein each of the pair of left and right front wheel drive cases is connected and fixed from above to a bracket attached and fixed to the lower surface of each of the pair of left and right front and rear frames.   The harvesting machine according to claim 7 or 8, wherein attachment positions of the front wheel drive cases in each of the pair of left and right front and rear frame bodies are connected by a front side lateral connection body. A transmission case is provided that shifts power from an engine to the middle part of the pair of left and right front wheel drive cases and transmits the power to the pair of left and right front wheel drive cases.
The transmission case is provided with an installation support that is installed horizontally on the pair of left and right front-rear frames at the rear side of the transmission case, and the transmission case is supported by a support arm that extends from the installation support to the front of the vehicle. The harvester according to any one of claims 6 to 9, wherein is supported.   The harvesting machine according to claim 10, wherein the erection support body is connected and fixed to a pair of left and right brackets attached and fixed in a state of extending downward to the lower surfaces of the pair of left and right front and rear frames.   Between the front wheel and the rear wheel, a residue processing device for processing residue remaining in the farm is provided at a lower portion of the traveling vehicle body, and the residue processing device is supported by the construction support body. The harvesting machine according to claim 11. Behind the erection support body is provided with an intermediate lateral connection body that connects the pair of left and right front-back frame bodies,
The harvesting machine according to claim 12, wherein a lifting / lowering cylinder that lifts and lowers the residue processing device is supported on the intermediate side connecting body. A driving part is provided at the front of the traveling vehicle body,
The driving unit frame that supports the driving unit is provided at a front portion of the traveling vehicle body in a state of extending upward from the pair of left and right front-rear frames. Harvesting machine according to item. A recovery unit for recovering the harvest object is provided at the rear of the traveling vehicle body,
15. The recovery unit frame according to claim 1, wherein a recovery unit frame that supports the recovery unit is provided at a rear portion of the traveling vehicle body in a state of being positioned above the pair of left and right front-back frames. Harvester.   The engine is mounted between the front wheel and the rear wheel, positioned above the pair of front and rear frame bodies and projecting outward from the pair of front and rear frame bodies to one side in the lateral direction of the vehicle body. The harvester according to any one of claims 1 to 15, further comprising an engine support frame portion for support.   The engine is mounted and supported on an upper portion of the engine support frame portion, and is supported by a support frame standing from the engine support frame portion, and a radiator is provided in a state of being positioned above the engine. Harvesting machine.   A fuel tank that is positioned above the pair of front-rear frame bodies between the front wheels and the rear wheels and projects outward from the pair of front-rear frame bodies on the other side in the vehicle lateral direction. The harvester according to any one of claims 1 to 17, further comprising a fuel tank frame part for mounting support.   A countershaft extending from one lateral side to the other lateral side of the traveling vehicle body and transmitting engine power to the harvesting device is provided in a state of being positioned below the pair of front-rear frame bodies. The harvester of any one of 1-18.

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