JP7499693B2 - combine - Google Patents

Description

The present invention relates to a combine harvester that is equipped with a cutting section at the front of the machine body that cuts planted stalks, and that is equipped with multiple lifting devices lined up in the left-right direction on the cutting section.

The above combine harvester is provided with a lifting drive shaft that extends in the left-right direction while positioned above the lifting devices and transmits power to each of the lifting devices, and the front side of the lifting drive shaft is covered by an upper cover. Conventionally, the upper cover has been provided in a position that is generally aligned with the front of the lifting devices across the entire width in the vertical direction (see, for example, Patent Document 1).

JP 2010-104258 A

In the above conventional configuration, there is no gap between the upper cover and the front of the lifting device, so there is little risk of crops getting caught between them and becoming stuck. However, in the above conventional configuration, the space between the upper cover and the lifting drive shaft is narrow, which has the disadvantage of reducing the freedom of installation when installing components that support the upper cover.

Therefore, there was a demand for greater freedom in the placement of components between the upper cover and the lifting drive shaft while still allowing the lifted crops to be transported smoothly rearward.

The characteristic configuration of the combine harvester according to the present invention is that a harvesting unit for harvesting planted stalks is provided at the front of the body, the harvesting unit is provided with a number of lifting devices lined up in the left-right direction, a lifting drive shaft extending along the left-right direction while positioned above the plurality of lifting devices and transmitting power to each of the plurality of lifting devices, and an upper cover covering the front side of the lifting drive shaft, an upper front portion is provided on the upper side of the upper cover which is located forward of the front surface of the lifting device in a direction perpendicular to the front surface when viewed from the side , and a proximate portion is provided at a lower portion of the upper cover below the lifting drive shaft and approaches the lifting device, an upward recessed portion that recesses upward is formed at a portion of the lower portion corresponding to above the stalk lifting path of each of the plurality of lifting devices, and the proximate portion is provided at a portion of the lower portion corresponding to above the return path of each of the plurality of lifting devices and within a vertical width corresponding to the recess depth of the upward recessed portion.

According to the present invention, the upper front portion of the upper cover is disposed forward relative to the front surface of the lifting device, and the space between the upper cover and the lifting drive shaft is expanded in the front-rear direction. As a result, the degree of freedom in installing members between the upper cover and the lifting drive shaft can be increased. Since the lower portion of the upper cover approaches the lifting device due to the proximity portion, no gap is created between the upper cover and the front surface of the lifting device, and there is little risk of poor crop transport.

Therefore, it is possible to improve the freedom of installation of members between the upper cover and the lifting drive shaft while ensuring smooth transport of crops.
In addition, because an upward recess is formed above the stalk lifting path, the risk of the tips of the crops coming into contact with the upper cover and being damaged is reduced, even for tall crops. Even if a tall crop leans toward the upper part of the return path, the proximity section reduces the risk of crop transport problems.

In the present invention, it is preferable that the upper front portion of the upper cover is stepped forward relative to the front surface of the lifting device in a side view.

According to this configuration, the upper portion of the upper cover is tilted forward, and a large space is formed between the upper cover and the raising drive shaft, further increasing the degree of freedom in installing components.

In the present invention, it is preferable that the adjacent portion has a rearward curved surface that curves in a shape that bulges backward in side view and approaches the lifting device.

With this configuration, the recessed portion of the upper cover penetrates sharply toward the rear side, and while there is little change in the downward position, the amount of penetration in the front-to-rear direction can be increased. Because the recess is closer to the lifting device, there is less protrusion toward the front at the lower portion, and there is less risk of contact with the crops.

In the present invention, it is preferable that the proximal portion is formed with an inclined surface that is inclined toward the lifting device in a side view.

This configuration requires little processing time because it can be achieved by simply forming an inclined surface on the upper cover.

In the present invention, it is preferable that the approaching surface is formed with a forward-facing curved surface that curves in a forward-bulging shape in a side view and approaches the lifting device.

With this configuration, where the curved surface of the upper cover is formed, the intrusion toward the rear side is steep, and while there is little change in the position toward the bottom, the amount of intrusion in the front-to-rear direction can be made large. Because the shape bulges forward, the space between the upper cover and the raised drive shaft can be made wider even at the lower part.

In the present invention, a reaping section for reaping planted stalks is provided at the front of the machine body, and the reaping section is provided with a plurality of lifting devices arranged in the left-right direction, a lifting drive shaft that extends along the left-right direction while being positioned above the plurality of lifting devices and transmits power to each of the plurality of lifting devices, and an upper cover that covers the front side of the lifting drive shaft, and an upper front portion is provided on the upper side of the upper cover that is located forward of the front surface of the lifting devices in a direction perpendicular to the front surface in a side view, and It is preferable that a proximal portion approaching the lifting device is provided at a lower side location below the lifting drive shaft, headlights and headlight covers covering the headlights are provided on both left and right lateral sides of the multiple lifting devices, a lateral retracting portion that retracts outwardly in the left and right direction in a portion of the inner left and right location of the headlight cover adjacent to the lower side location is provided, and a protruding portion that protrudes outwardly in the left and right direction in a front view so as to enter the lateral retracting portion at the outer left and right ends of the lower side location.

According to this configuration, the upper front portion of the upper cover is provided in a state where it is closer to the front side than the front surface of the lifting device, and the space between the upper cover and the lifting drive shaft is expanded in the front-rear direction. As a result, the degree of freedom in installing members between the upper cover and the lifting drive shaft can be increased. Since the lower portion of the upper cover approaches the lifting device by the proximity portion, no gap is generated between the upper cover and the front surface of the lifting device, and there is little risk of crop transport failure. Therefore, it is possible to increase the degree of freedom in installing members between the upper cover and the lifting drive shaft while ensuring good crop transport. In addition, the space formed by the lateral retraction portion of the headlight cover can be filled by the protruding portion of the upper cover, reducing the gap between the headlight cover and the upper cover, and allowing crop transport to be performed smoothly.

FIG. FIG. FIG. 4 is a side view showing the support structure of the lifting device. FIG. 4 is a vertical cross-sectional side view of the upper cover installation portion. FIG. 4 is a perspective view showing an attached state of a second member. FIG. 4 is a cross-sectional plan view showing the attached state of the second member. FIG. 4 is a perspective view showing an attached state of a first member. FIG. 4 is a front view of the left end portion of the upper cover. FIG. 11 is a vertical sectional side view of an upper cover installation portion of another embodiment. FIG. 11 is a vertical sectional side view of an upper cover installation portion of another embodiment.

An embodiment of the present invention will be described with reference to the drawings. In the following description, the direction of the arrow "F" refers to the "front of the aircraft", the direction of the arrow "B" refers to the "rear of the aircraft" (see Figure 1), the direction of the arrow "L" refers to the "left side of the aircraft", and the direction of the arrow "R" refers to the "right side of the aircraft" (see Figure 2).

〔overall structure〕
As shown in Fig. 1, the combine harvester according to the present invention includes a traveling body 1 and a reaping unit 2 capable of reaping seven rows of planted culms. The reaping unit 2 is connected to the traveling body 1 so as to be capable of swinging up and down about a horizontal axis P1, and is provided so as to be capable of being driven up and down by a lifting hydraulic cylinder 3.

The traveling machine body 1 is equipped with left and right crawler traveling devices 4, and the driving unit 5 is provided on the right side (one side in the left-right direction) of the front part of the machine body. Behind the driving unit 5, a threshing device 6 that threshes the stalks harvested by the harvesting unit 2 and a grain tank 7 that stores the grains obtained by the threshing process are provided in a state lined up in the lateral direction of the machine body. The driving unit 5 is covered by a cabin 8. Although not shown, the threshing device 6 clamps the base of the harvested stalks transported from the harvesting unit 2 with a threshing feed chain 9 and transports them, threshing the tip side inside the threshing chamber, and sorting the grains and dust in a sorting unit provided at the bottom of the threshing chamber. The grains are stored in the grain tank 7, and the dust is discharged outside the machine. It is equipped with a grain discharge device 10 that can discharge the grains stored in the grain tank 7 to the outside, and a shredding device 11 that shreds the waste straw after threshing and then discharges it outside the machine.

As shown in Figures 1 and 2, the harvesting section 2 is equipped with a plurality (eight) of weed-dividing tools 12 that are spaced apart in the left-right direction and guide the planted culms to be introduced into the seven culm introduction paths, a plurality (seven) of lifting devices 13 that are arranged in a left-right line corresponding to each of the culm introduction paths and lift the planted culms, a clipper-type cutting blade 14 that cuts the base of the lifted planted culms, and a transport device 15 that merges the harvested culms in the cutting width direction and transports them backwards.

The reaping unit 2 is equipped with a reaping frame 20 that supports the entire reaping unit 2. The reaping frame 20 includes a main frame 22 that extends forward from the machine frame 21 and has a rear end that is supported so that it can swing up and down, a horizontal frame 23 that extends left and right from the front end of the main frame 22, and a lift-up transmission case 24 that extends upward from one end of the horizontal frame 23.

A hydraulic cylinder 3 is connected between the main frame 22 and the machine frame 21, and the cutting unit 2 is configured to be raised and lowered between a cutting position (shown by solid lines in Figure 1) and a retracted position (shown by phantom lines in Figures 1 and 2) as the maximum raised position by being swung up and down by the hydraulic cylinder 3.

The harvesting unit 2 is provided with left and right side covers 25 that cover both the left and right sides of the multiple lifting devices 13. Above the left and right side covers 25, left and right headlight devices 26 and left and right headlight covers 27 that cover the headlight devices 26 are provided.

The headlight cover 27 is configured to cover the periphery of the headlight device 26 provided at the upper part of both the left and right sides of the cutting unit 2, as well as the upper parts of the left and right lateral sides of the multiple lifting devices 13. The left and right side covers 25 are configured to cover the lower parts of the left and right lateral sides of the multiple lifting devices 13.

[Raising device]
The lifting device 13 is provided in an upright position with its lower end positioned toward the front of the machine body and its upper end positioned toward the rear of the machine body. As shown in Fig. 2, the lifting device 13 has an endless rotating chain 32 wound and tensioned around a drive wheel 29 and a tension wheel 30 disposed at the top of a lifting case 28, and a guide wheel 31 disposed at the bottom of the case. A number of lifting claws 33 are supported by the endless rotating chain 32 at a predetermined pitch so as to be able to rise and fall freely.

The lifting device 13 has a lifting path Q1, which is the upward path of the endless rotating chain 32 on both the left and right sides, and a return path Q2 on the opposite side. The lifting path Q1 is equipped with a guide plate that guides the lifting claw 33 to stand at the point where the endless rotating chain 32 passes. In the lifting path Q1, the lifting claw 33 protruding sideways moves upward while combing the stalks, and when it reaches the end of the lifting path Q1, it is removed from the stalks and stored inside the lifting case 28, and then moves down the return path to return to the lifting action path side.

A lifting drive shaft 34 is provided that extends in the left-right direction while positioned above the multiple lifting devices 13 and transmits power to each of the multiple lifting devices 13. Although the transmission structure is not shown, power from the aircraft side is transmitted to the lifting drive shaft 34 via a longitudinal transmission shaft provided inside the main frame 22, a lateral transmission shaft provided inside the lateral frame 23, and a vertical transmission shaft provided inside the lifting transmission case 24.

A plurality of drive transmission units 35 that branch and transmit power from the lifting drive shaft 34 to each of the plurality of lifting devices 13 are provided at intervals in the left-right direction. As shown in FIG. 4, the drive transmission unit 35 is configured such that an upper bevel gear mechanism 37, a vertical transmission shaft 38 extending along the longitudinal direction of the case, a lower bevel gear mechanism 39, and a front-rear transmission shaft 40 are installed inside a vertically elongated drive case 36, and the drive transmission unit 35 transmits power from the lifting drive shaft 34 to the drive wheel 29 of the lifting device 13.

As shown in FIG. 3, a support arm 41 made of pipe bent into a mountain shape extends forward from the base boss of the harvesting frame 20 to a position above the lifting devices 13. A support frame 42 extending in the left-right direction above the lifting devices 13 is connected to the front end of the support arm 41. The support frame 42 is formed by bending a plate material, and the front end of the support arm 41 is connected to it.

A number of support brackets 43 are bolted to the support frame 42 at intervals in the left-right direction, and the drive case 36 is fitted and supported by each support bracket 43 so that it can swing up and down around the horizontal axis X1. The raised drive shaft 34 is supported through the upper part of the drive case 36. The drive case 36 is supported so that it can swing up and down around the axis X1 of the raised drive shaft 34.

The lifting device 13 is connected to the drive case 36 in a state in which it can swing integrally. The lifting device 13 swings up and down around the axis X of the lifting drive shaft 34, so that it can be switched between a normal operating position (shown by solid lines in FIG. 4) for lifting the stalks, and an open position (shown by phantom lines in FIG. 4) in which it swings upward to open the rear space, as shown in FIGS. 3 and 4. An air damper 44 is provided to hold the device in the open position.

As shown in Figures 4 and 5, in the region sandwiched between the drive transmission parts 35 spaced apart in the left-right direction, a winding prevention cover 45 is provided at a position corresponding to the upper part of the raising path Q1, covering the front and lower sides of the raising drive shaft 34. The winding prevention cover 45 is bolted to the support bracket 43 on both the left and right sides.

[Upper cover]
2, 3 and 4, there is provided an upper cover 46 that covers the front side of the raising drive shaft 34. The upper cover 46 is provided in a state of extending laterally from the left end raising device 13 to the right end raising device 13. The upper cover 46 is made of a resin material, and is supported by the raising device 13 so as to be vertically swingable about the upper horizontal axis X2 between a closed state in which the front side of the raising drive shaft 34 is covered, and an open state in which the front side of the raising drive shaft 34 is exposed.

The upper cover 46 has upward recesses 47 formed at locations corresponding to the upper part of the lifting path Q1 of each of the multiple lifting devices 13. This makes it easier to avoid problems with the transport of the stalks caused by the upper part of the planted stalks lifted by the lifting devices 13 interfering with the upper cover 46.

An upper front portion 46A is provided on the upper portion of the upper cover 46, which is stepped toward the front side with respect to the front surface 13a of the lifting device 13, and a proximate portion 48 is provided on a lower portion 46B of the upper cover 46 below the lifting drive shaft 34, which approaches the lifting device 13. As shown in Figures 4 and 7, the proximate portion 48 is formed on the lower portion 46B of the upper cover 46 by a rearward curved surface 49 that retracts in a curved manner backward so as to approach the lifting device 13.

The lower portion 46B of the upper cover 46 is provided with a proximity portion 48 at a location corresponding to the upper portion of the return path Q2 of each of the multiple lifting devices 13. The portion of the upper cover 46 corresponding to the upper portion of the return path Q2 is wide in the vertical direction and extends below the upper end position of the lifting device 13. The proximity portion 48 is provided midway up and down in the wide extension portion.

The proximity portion 48 is located above the upper end position of the lifting device 13. In other words, a rearward-facing curved surface 49 is formed above the upper end position of the lifting device 13, recessed so as to approach the lifting device 13. This makes it easy to avoid interference with the upper cover 46 and poor transport of the stalks, even if the tip side of the planted stalks raised by the lifting device 13 leans against a point corresponding to the upper part of the return path Q2.

As shown in FIG. 8, the headlight cover 27 has a lateral retraction section 50 that retracts outward in the lateral direction in a front view at a section adjacent to the lower section 46B of the upper cover 46 among the left-right inner sections. The lower section 46B of the upper cover 46 has a protruding section 51 at the left-right outer end that protrudes outward in the lateral direction so as to enter the lateral retraction section 50 of the headlight cover 27. This configuration reduces the gap between the headlight cover 27 and the upper cover 46, preventing the stalk from entering and making it easier to avoid poor transport of the stalk.

[Position retention mechanism]
A position holding mechanism 52 is provided for holding the upper cover 46 in a closed state. As shown in Fig. 2, the position holding mechanism 52 is provided at positions corresponding to the positions of the upper cover 46 where the upward recesses 47 are formed, as viewed from the front. The position holding mechanism 52 is configured such that a first member 53 provided on the upper cover 46 side and a second member 54 provided on the raising drive shaft 34 side attract each other by magnetic force, thereby holding the upper cover 46 in position. That is, the configuration is such that an iron material and a magnet attract each other by magnetic force. The first member 53 is made of an iron material, and the second member 54 is made of a permanent magnet.

As shown in Figures 4 and 7, the back surface of the upper cover 46 is provided with reinforcing ribs 55 extending in the left-right direction. The reinforcing ribs 55 are formed at two locations, one above and one below, on the back surface of the upper cover 46 in a state where they are molded integrally with the upper cover 46. The reinforcing ribs 55 are provided with locking portions 56 that lock and hold the first member 53.

The locking portion 56 is provided with an extension extending downward from the upper reinforcing rib 55, and is configured to lock and hold the first member 53 in a state in which it is sandwiched in the recess between this extension and the upper cover 46, and is provided with an extension extending upward from the lower reinforcing rib 55, and is configured to lock and hold the first member 53 in a state in which it is sandwiched in the recess between this extension and the upper cover 46.

The first member 53 is formed by bending an iron plate into a shape that allows it to easily fit into the upper and lower locking portions 56. The upper and lower recesses 58, 60 are configured to clamp and hold the first member 53 in place by elastic deformation when it is inserted.

The first member 53 is provided at positions corresponding to the multiple locations where the upward recesses 47 are formed in the upper cover 46 in a front view, that is, positions corresponding to the left and right middle parts of adjacent drive transmission parts 35 among the multiple drive transmission parts 35. Also, the first member 53 is provided at a position facing the raised drive shaft 34 in a side view.

The second member 54 is made of a permanent magnet and is provided at a position facing the first member 53, i.e., at a position corresponding to the left-right middle portion of adjacent drive transmission parts 35 among the multiple drive transmission parts 35. The second member 54 is attached to a winding prevention cover 45 provided on the front side of the raising drive shaft 34.

As shown in Figures 5 and 6, the connecting base 61 to which the second member 54 is fixedly attached is pressed against the rear side of the anti-winding cover 45 and bolted to it. When the base 61 is attached, the second member 54 is configured to be exposed forward through an insertion hole 62 formed in the anti-winding cover 45.

When the top cover 46 is in the closed state, the first member 53 is positioned facing and close to the second member 54, and the first member 53 and the second member 54 are attracted to each other by magnetic force, thereby holding the top cover 46 in the closed state.

The position holding mechanism 52 is configured to release the position holding mechanism by the force that causes the upper cover 46 to swing upward. In other words, the magnetic force of attraction is set to a level that allows the position holding mechanism to be released by manually swinging the upper cover 46 upward.

The upper cover 46 is provided so as to cover the upper front portion of the lifting device 13, and the position holding mechanism 52 is configured so that when the lifting device 13 is switched from the normal operating position to the open position, the magnetic force between the first member 53 and the second member 54 is overcome, and the front surface 13a of the lifting device 13 comes into contact with the position holding mechanism 52, releasing the position holding mechanism 52.

〔Direction indicator〕
Left and right direction indicators 62R, 62L are provided at the front of the machine body. Of the left and right direction indicators 62R, 62L, the right direction indicator 62R is provided at a right side, which is one side in the left-right direction, in the front of the cabin 8. The left direction indicator 62L is provided at a left side, which is the opposite side in the left-right direction, in the front of the machine body, i.e., at the left side of the mowing unit 2. The left direction indicator 62L is supported by a support body 72 connected to the mowing frame 20, as shown in FIG. 3 .

The right turn signal 62R is supported by the front pillar 64 of the cabin 8. A rearview mirror 65 is provided on the outer lateral part of the cabin 8, and the right turn signal 62R is located below the bottom end of the rearview mirror 65 and at the same height as the top end of the threshing device 6. The right turn signal 62R is located in approximately the same position in the left-right direction as the right headlight device 26.

An operating unit 67 having a changeover switch 66 as an operating tool for switching the operating state of the direction indicators 62R, 62L is provided on the right side at the front inside the cabin 8. The right direction indicator 62R is at the same height as the operating unit 67 and is provided at a height corresponding to the lower end of the right end of the windshield 68 of the cabin 8 when viewed from the front.

The right end of the cutting unit 2 is located to the right and outward of the right end of the cabin 8. Even with this configuration, the right-side turn signal 62R can be seen from the front when the cutting unit 2 is raised to the storage position.

The right direction indicator 62R is located at a higher position than the cutting unit 2 in the retracted position so that it can be seen from the front of the machine when the cutting unit 2 is raised to the retracted position. The right direction indicator 62R is located at a higher position than the left direction indicator 62R, even when the cutting unit 2 is raised to the retracted position.

[Another embodiment]
(1) In the above embodiment, the proximal portion 48 is configured to have a rearward-facing curved surface 49 that recesses toward the lifting device 13. However, instead of this configuration, for example, as shown in FIG. 9 , the proximal portion 48 may be configured to have an inclined surface 69 that slopes from the upper front portion 46A toward the lifting device 13 at the lower side portion 46B. Alternatively, as shown in FIG. 10 , the proximal portion 48 may be configured to have a forward-facing curved surface 70 that curves in a shape that bulges forward from the upper front portion 46A and approaches the lifting device 13.

(2) In the above embodiment, the upper cover 46 is stepped toward the front surface 13a of the lifting device 13, but it may be stepped toward the front surface 13a and gradually move toward the front as it moves upward.

(3) In the above embodiment, the headlamp cover 27 is provided with a lateral retraction portion 50, and the upper cover 46 is provided with a protruding portion 51. However, instead of this configuration, the inner left-right portions of the headlamp cover 27 and the outer end portion of the upper cover 46 may both be configured to be linearly arranged in the vertical direction.

The present invention can be applied to head-feeding combine harvesters.

2 reaping unit 13 lifting device 26 headlight device 27 headlight cover 34 lifting drive shaft 46 upper cover 46A upper front portion
46B Lower side portion 47 Upward recess 49 Rearward curved surface 50 Lateral retraction portion 51 Projection portion 69 Inclined surface 70 Curved surface Q1 Grain stalk lifting path Q2 Return path

Claims (6)

The front of the machine is equipped with a reaping section that harvests planted stalks.
The reaping unit is provided with a plurality of lifting devices arranged in the left-right direction, a lifting drive shaft extending along the left-right direction while being positioned above the plurality of lifting devices and transmitting power to each of the plurality of lifting devices, and an upper cover covering a front side of the lifting drive shaft,
An upper front portion is provided on the upper side of the upper cover, the upper front portion being located forward of the front surface of the lifting device in a direction perpendicular to the front surface in a side view, and a proximate portion is provided on a lower portion of the upper cover that is lower than the lifting drive shaft and approaches the lifting device,
An upward recessed portion that recesses upward is formed at a portion of the lower side portion corresponding to the upper portion of the stalk lifting path of each of the plurality of lifting devices,
A combine harvester in which the adjacent portion is provided at a location among the lower side locations that corresponds to the upper side of the return paths of each of the plurality of lifting devices and that corresponds to within an up-down width that corresponds to the recess depth of the upward recess. The combine harvester according to claim 1 , wherein the upper front portion of the upper cover is stepped forward relative to a front surface of the lifting device in a side view. The combine harvester according to claim 1 or 2, wherein the adjacent portion is formed with a rearward curved surface that curves in a shape that bulges out backward in a side view and approaches the lifting device. The combine harvester according to claim 1 or 2, wherein the adjacent portion is formed with an inclined surface that is inclined so as to approach the lifting device in a side view. The combine harvester according to claim 1 or 2, wherein the adjacent portion is formed with a forward-facing curved surface that curves in a shape that bulges forward in a side view and approaches the lifting device. The front of the machine is equipped with a reaping section that harvests planted stalks.
The reaping unit is provided with a plurality of lifting devices arranged in the left-right direction, a lifting drive shaft extending along the left-right direction while being positioned above the plurality of lifting devices and transmitting power to each of the plurality of lifting devices, and an upper cover covering a front side of the lifting drive shaft,
An upper front portion is provided on the upper side of the upper cover, the upper front portion being located forward of the front surface of the lifting device in a direction perpendicular to the front surface in a side view, and a proximate portion is provided on a lower portion of the upper cover that is lower than the lifting drive shaft and approaches the lifting device,
A headlight and a headlight cover for covering the headlight are provided on both the left and right sides of the plurality of lifting devices,
A lateral retraction portion that retracts outward in the left-right direction in a front view is provided in a portion of the headlamp cover adjacent to the lower portion among the left-right inner portions,
A combine harvester in which the lower portion is provided at the outer left and right ends with a protruding portion that protrudes outward in the left and right direction so as to enter the lateral retraction portion when viewed from the front.

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