combine

Abstract

To provide a combine harvester which is provided with a cabin at an operating section, and in which enlargement of a combine harvester body is prevented even when an engine is made larger-sized, a space for arranging exhaust pipes are secured, and lowering of capacity of a grain tank is prevented.SOLUTION: A combine harvester includes: a threshing device for thresh processing reaped crop plants; and a grain tank 6 which is arranged side by side to the threshing device and accumulates the grain obtained by the threshing device. On a side wall section 6L of the grain tank 6 at a side where the threshing device is positioned, there are provided a first section 6a arranged at a front upper part of the side wall section 6L and a second section 6b arranged adjacent to and below the first section 6a. The first section 6a is constituted so as to evaginate relative to the second section 6b toward the threshing device side. A front part of the first section 6a and a side part of the front part of the second section 6b at the threshing device side are constituted being apart from the threshing device as being at the front side of the machine body only at the front part of the first section 6a.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a combine harvester equipped with a threshing device that threshes harvested crops, and a grain tank that is arranged side by side with the threshing device and stores the grains obtained by the threshing device. [Background technology]

[0002] Conventionally, some combine harvesters are equipped with an engine below the driver's unit, a grain tank behind the driver's unit, and a threshing device aligned side-by-side with the grain tank, with an exhaust pipe or the like disposed between the threshing device and the grain tank (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-187391 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there is a tendency for the driving section to be equipped with a cabin in order to improve the comfort of the operator, and for the engine to be enlarged in order to improve the work efficiency. In the above conventional configuration, the driving section is equipped with a cabin that requires a large installation space, and when the engine is enlarged, the combine body is disadvantageously enlarged. In addition, when the size of the grain tank provided behind the driving section is reduced in order to avoid the enlargement of the combine, there is an inconvenience that the capacity of the grain tank is reduced. Furthermore, it is necessary to secure a space for arranging an exhaust pipe, etc., between the threshing device and the grain tank.

[0005] The present invention is devised to solve the above-mentioned problems, and aims to provide a combine that is equipped with a cabin in the driver's section, prevents the combine body from becoming larger even when the engine is enlarged, ensures space for arranging exhaust pipes, etc., and prevents a reduction in the capacity of the grain tank. [Means for solving the problem]

[0006] The present invention is characterized in that it comprises a threshing device for threshing harvested crops, a grain tank arranged side by side with the threshing device for storing grains obtained by the threshing device, and a lifting device arranged vertically in the space between the threshing device and the grain tank for transporting the grains obtained by the threshing device from the lower part of the threshing device to the upper part of the grain tank, the side wall part of the grain tank on the side where the threshing device is located is provided with a first portion arranged in a front upper part located forward of the lifting device on the side wall part, and a second portion arranged adjacent to and below the first portion, the first portion is configured to bulge out toward the threshing device relative to the second portion, and the front part of the first portion and the side part of the second portion on the side of the threshing device are configured to be separated from the threshing device as they approach the front of the machine only at the front part of the first portion. a precleaner that purifies outside air supplied to the engine, the precleaner being provided so as to overlap a front portion of the first portion in a front view and a side view. The point is...

[0007] According to this characteristic configuration, the capacity of the grain tank can be increased by expanding the first portion of the grain tank. Moreover, unlike the first portion, the second portion of the grain tank is not configured to be farther away from the threshing device as it approaches the front of the aircraft, i.e., the second portion does not have a configuration in which the front of the second portion narrows, so that the capacity of the grain tank can be further increased. Therefore, for example, even if the length of the grain tank in the front-to-rear direction is shortened due to the installation of a cabin and an increase in the size of the engine, the capacity of the grain tank can be maintained.

[0008] Furthermore, according to this characteristic configuration, the second portion of the grain tank is farther away from the threshing device than the first portion, so it is possible to ensure space for installing an exhaust pipe, etc., between the second portion and the threshing device. Also, since the front portion of the first portion of the grain tank is configured to be farther away from the threshing device the closer it is to the front of the machine body, it is possible to ensure space for installing, for example, a precleaner, etc., between the threshing device and the front portion of the first portion.

[0009] Therefore, with this characteristic configuration, even if the front-to-rear length of the grain tank becomes shorter due to the installation of a cabin and an increase in engine size, it is possible to secure space for installing an exhaust pipe, etc., while maintaining the capacity of the grain tank without increasing the size of the combine body. According to this characteristic configuration, a space is secured between the front of the first portion of the grain tank, which is configured to be farther away from the threshing device as it approaches the front of the machine body, and the precleaner is disposed using this space. Therefore, it is possible to provide the precleaner by effectively utilizing the space between the front of the first portion and the threshing device.

[0010] Another feature of the present invention is a method for producing a crop threshing machine that threshes harvested crops, and a grain tank that is arranged side by side with the threshing machine and stores grains obtained by the threshing machine, the grain tank being provided with a first portion arranged at a front upper portion of the side wall portion on the side where the threshing machine is located, and a second portion arranged adjacent to and below the first portion, the first portion being configured to bulge out toward the threshing machine relative to the second portion, and the front portion of the first portion and the side portion of the second portion on the threshing machine side are configured to be farther away from the threshing machine as they approach the front of the machine body only at the front portion of the first portion, and the grain tank being provided with a grain tank that is arranged side by side with the threshing machine, the grain tank being provided with a grain tank that is arranged side by side with the threshing machine, the first portion being configured to bulge out toward the threshing machine relative to the second portion, and the side portion of the front portion of the first portion and the front portion of the second portion on the threshing machine side are configured to be farther away from the threshing machine as they approach the front of the machine body only at the front portion of the first portion, The lifting device is provided for transporting the lifted grains from the lower part of the threshing device to the upper part of the grain tank, and a vertical recessed portion is provided in the middle part of the side wall in the front-to-rear direction, extending from the lower part to the upper part of the side wall, and is recessed toward the inside of the grain tank.The lifting device is provided in the space between the threshing device and the grain tank, extending in the up-down direction and entering the vertical recessed portion, and a third portion is provided on the side wall rearward of the vertical recessed portion, and the third portion is configured so that the distance from the center position of the grain tank in the left-right direction of the machine body to the third portion is the same as the distance from the center of the grain tank in the left-right direction of the machine body to the second portion.

[0011] According to this characteristic configuration, the lifting device is provided to enter the vertical recess, and further, the third part is located at the same position as the second part in the left-right direction of the machine body at the location corresponding to the third part, so that a large linear space is formed between the third part and the threshing device from the front to the rear of the grain tank. This configuration makes it possible to install large equipment between the threshing device and the grain tank.

[0012] In the present invention, it is preferable that the second portion is provided with a first inspection hatch and a first cover body that can be switched between a closed state that blocks the first inspection hatch and an open state that opens the first inspection hatch, and that the first inspection hatch is formed to extend from the front to the rear of the second portion and from the top to the bottom of the second portion.

[0013] Generally, the grain tank is large in size and has a considerable height in order to store a large amount of grain. Furthermore, above the second portion, a first portion is provided that bulges toward the threshing device, and access to the space between the threshing device and the grain tank from above is not easy, making assembly and maintenance difficult. According to this characteristic configuration, the second portion of the grain tank is provided with a first inspection hatch having a large opening. This allows easy access to the exhaust pipe and the like installed between the threshing device and the grain tank through the first inspection hatch, making assembly and maintenance easy.

[0014] In the present invention, it is preferable that the third portion is provided with a second inspection hatch and a second cover body that can be switched between a closed state that blocks the second inspection hatch and an open state that opens the second inspection hatch, and that the second inspection hatch is formed to extend from the front to the rear of the third portion and from the top to the bottom of the third portion.

[0015] According to this characteristic configuration, the third portion is provided with a second inspection opening having a large opening. This allows easy access to the space between the threshing device and the grain tank, even if the grain tank is large in size and has a considerable height in order to store a large amount of grain. Therefore, assembly and maintenance work can be easily performed in the area corresponding to the rear side of the grain tank between the threshing device and the grain tank.

[0016] In the present invention, a grain discharge device is provided which discharges grains stored in the grain tank, the grain tank having a rear wall portion extending along the vertical direction of the machine body, the grain discharge device having a bending portion connected to the lower part of the rear wall portion and bending from the horizontal direction to an upward direction from the rear wall portion toward the downstream side in the conveying direction, and a vertical conveying portion connected to the conveying end point of the bending portion and extending upward along the vertical direction of the machine body, and it is preferable that the bending start point of the bending portion upstream in the conveying direction is located at the connection point with the rear wall portion.

[0017] According to this characteristic configuration, the start point of bending of the bending portion of the grain discharge device is located at the connection point with the rear wall portion, making it possible to arrange the vertical conveying portion of the grain discharge device near the rear wall portion. This makes it possible to extend the rear wall portion of the grain tank close to the vertical conveying portion of the grain discharge device, thereby making it possible to increase the size of the grain tank, i.e., the capacity of the grain tank.

[0018]

[0019] [Brief description of the drawings]

[0020] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 4 is a rear view showing the frame structure of the driver's section. [Figure 4] FIG. 2 is a side view showing the grain tank. [Diagram 5] 5 is a cross-sectional view taken along the arrows VV in FIG. 4. [Figure 6] 6 is a cross-sectional view taken along the line VI-VI in FIG. 4. [Figure 7] FIG. 2 is a plan view showing the frame structure of the driving section. [Figure 8] FIG. 2 is an exploded perspective view showing a frame structure of the driving section. [Figure 9] FIG. 11 is a rear view showing a mounting structure of a precleaner according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The embodiment of the present invention will be described with reference to the drawings when applied to a head-feeding combine as an example of a combine harvester. In the following description, the direction of the arrow F is the "front side of the machine body" (see Fig. 1 and Fig. 2), the direction of the arrow B is the "rear side of the machine body" (see Fig. 1 and Fig. 2), the direction of the arrow U is the "upper side of the machine body" (see Fig. 1), the direction of the arrow D is the "lower side of the machine body" (see Fig. 1), the direction of the arrow L is the "left side of the machine body" (see Fig. 2), and the direction of the arrow R is the "right side of the machine body" (see Fig. 2).

[0022] [Overall structure of the combine harvester] As shown in Figures 1 and 2, the combine harvester of the present invention is provided with a machine frame 1 and a pair of left and right crawler traveling devices 2. A reaping unit 3 that reaps planted culms is provided at the front of the machine body. A threshing device 5 that threshes the culms reap by the reaping unit 3, and a grain tank 6 that stores the grains obtained by the threshing process are provided side by side at the rear of the machine body. The grain tank 6 can be opened and closed by swinging about an axis X that extends vertically between a working position and a maintenance position. A conveying unit 4 that conveys the reaped culms from the reaping unit 3 to the threshing device 5 is provided between the reaping unit 3 and the threshing device 5.

[0023] In front of the grain tank 6 and to the right of the conveying section 4, there is provided a driving section 7 covered by a cabin 8. An engine room ER that houses an engine E is provided below the driving section 7. Behind the driving section 7, there are provided an air cleaner 14 and a precleaner 15 that purify the outside air supplied to the engine E.

[0024] The threshing device 5 clamps and transports the base side of the harvested stalks fed toward the rear of the machine body, while supplying the tip side to the threshing chamber for threshing. Although not shown, the processed material after threshing in the threshing chamber is sorted into grains, straw dust, etc. in a sorting section below, and the grains are transported outward to the right side from the bottom of the threshing device 5 by a first grain transport screw (not shown), and then lifted to the top of the grain tank 6 by the grain lifting device 17 and transported inside the grain tank 6. The grain lifting device 17 is installed in the space between the threshing device 5 and the grain tank 6, vertically aligned.

[0025] [About the grain tank] 1 to 4, the grain tank 6 includes a front wall 6F, a right side wall 6R, a left side wall 6L (corresponding to a "side wall"), a rear wall 6B, and a ceiling 6U. The grain tank 6 also includes a lower tapered portion 6D formed in a downwardly tapered shape when viewed from the front of the machine body.

[0026] As shown in Fig. 4, a vertical recess Q is formed in the left wall 6L of the grain tank 6 on the side where the threshing device 5 is located, from the bottom to the top of the left wall 6L, and is recessed toward the inside of the grain tank 6. The vertical recess Q is located in the middle of the left wall 6L in the front-rear direction. As shown in Fig. 5, the lifting device 17 is provided so as to enter the vertical recess Q.

[0027] As shown in Figures 4 and 5, the left side wall 6L is provided with a bulging portion 6a (corresponding to a "first portion") and a front flat surface 6b (corresponding to a "second portion") forward of the vertical recess Q. The left side wall 6L is provided with a rear flat surface 6c (corresponding to a "third portion") rearward of the vertical recess Q. The left side wall 6L is provided with a lower inclined surface 6DL below the front flat surface 6b and the rear flat surface 6c, which constitutes the left portion of the lower narrowing portion 6D.

[0028] The bulging portion 6a is provided on the front upper portion of the left side wall portion 6L, and is configured to bulge toward the side where the threshing device 5 is located with respect to the front flat surface portion 6b, as shown in Fig. 2. As shown in Fig. 5, a distance D1 from an imaginary line L1 passing through the left-right center of the grain tank 6 to the outermost lateral side of the bulging portion 6a is configured to be longer than a distance D3 from the imaginary line L1 to the rear flat surface portion 6c.

[0029] As shown in Figs. 4 and 5, the bulging portion 6a is formed with a rectangular planar portion 6aa extending along the longitudinal direction and vertical direction of the aircraft body.

[0030] A first inclined surface 6ab is formed in the front of the bulging portion 6a, which is spaced further away from the threshing device 5 as it approaches the front of the machine body. The first inclined surface 6ab is provided from the front edge of the flat portion 6aa to the upper portion of the front edge of the left side wall portion 6L.

[0031] A second inclined surface 6ac is formed at the lower part of the bulging portion 6a, which is spaced further away from the threshing device 5 as it approaches the lower side of the machine body. The second inclined surface 6ac is provided from the lower edge of the flat portion 6aa to the upper edge of the front flat portion 6b.

[0032] A third inclined surface 6ad is formed at the rear of the bulging portion 6a, which is spaced apart from the threshing device 5 toward the rear of the machine body. The third inclined surface 6ad is provided from the rear edge of the flat portion 6aa to the upper portion of the front edge of the vertical recessed portion Q.

[0033] The front side of the ceiling portion 6U of the grain tank 6 extends toward the side where the threshing device 5 is located and is formed in a shape that fits the upper edges of the flat portion 6aa, the first inclined surface 6ab, and the third inclined surface 6ad, and is configured as the ceiling portion of the bulging portion 6a.

[0034] The front flat surface 6b is provided adjacent to the lower part of the bulging portion 6a and is formed in a flat shape extending to the lower part of the left side wall portion 6L. Specifically, in the vertical direction of the machine body, the front flat surface 6b is provided from the lower edge of the second inclined surface 6ac to the upper edge of the lower inclined surface 6DL. In the longitudinal direction of the machine body, the front flat surface 6b is provided from the front edge of the left side wall portion 6L to the front edge of the vertical recessed portion Q in a lower part corresponding to the lower end position of the second inclined surface 6ac. As shown in FIG. 6, the front flat surface 6b is configured so that the distance D2 from the imaginary line L1 passing through the center position of the grain tank 6 in the left-right direction of the machine body to the front flat surface 6b is the same as the distance D3 from the imaginary line L1 to the rear flat surface 6c. Also, as shown in FIG. 5, the distance D2 from the imaginary line L1 to the front flat surface 6b is configured to be shorter than the distance D1 from the imaginary line L1 to the outermost lateral side of the bulging portion 6a.

[0035] As shown in Fig. 4 and Fig. 6, the front plane portion 6b is provided with a first inspection opening 21a that communicates the inside and outside of the grain tank 6 and is used during assembly work and maintenance of the combine harvester, and a first lid body 21b that can be switched between a closed state that closes the first inspection opening 21a and an open state that opens the first inspection opening 21a. The first inspection opening 21a is formed in a substantially rectangular shape that extends from the front to the rear of the front plane portion 6b and from the top to the bottom of the front plane portion 6b. The first lid body 21b is formed in a substantially rectangular shape that is larger than the first inspection opening 21a. The first lid body 21b is fixed with bolts and configured to be easily detachable.

[0036] The rear flat surface 6c is formed in a flat shape extending from the upper part to the lower part of the left side wall 6L. Specifically, the rear flat surface 6c is provided from the upper edge of the left side wall 6L to the upper edge of the lower inclined surface 6DL. As shown in Fig. 5 and Fig. 6, the rear flat surface 6c is configured so that the distance D3 from the imaginary line L1 passing through the center position of the grain tank 6 in the left-right direction of the machine body to the rear flat surface 6c is the same at both the height position corresponding to the bulging portion 6a and the height position corresponding to the front flat surface 6b.

[0037] As shown in Fig. 4 and Fig. 6, like the front plane portion 6b, the rear plane portion 6c is provided with a second inspection opening 22a that communicates the inside and outside of the grain tank 6 and is used during assembly work and maintenance of the combine harvester, and a second lid body 22b that can be switched between a closed state that closes the second inspection opening 22a and an open state that opens the second inspection opening 22a. The second inspection opening 22a is formed in a substantially rectangular shape that extends from the front to the rear of the rear plane portion 6c and from the upper part to the lower part of the rear plane portion 6c. The second lid body 22b is formed in a substantially rectangular shape that is larger than the second inspection opening 22a. The second lid body 22b is fixed with bolts and configured to be easily detachable.

[0038] 1, 2, and 4, a grain discharge device 9 that discharges grains in the grain tank 6 to the outside is provided at the rear of the grain tank 6. The grain discharge device 9 is connected to the lower part of the rear wall portion 6B.

[0039] The grain discharge device 9 is provided with a bending portion 9A that bends from the horizontal direction to an upward direction from the rear wall portion 6B toward the downstream side in the conveying direction, a vertical conveying portion 9B that is connected to the conveying end point of the bending portion 9A and conveys the grains in the grain tank 6 upward, and a horizontal conveying portion 9C that conveys the grains from the vertical conveying portion 9B toward the outside of the machine body. The rear wall portion 6B is configured to extend along the up-down direction of the machine body, and the vertical conveying portion 9B is configured to fit along the rear wall portion 6B.

[0040] The bent portion 9A is configured so that the bent start point 9Aa on the upstream side in the conveying direction is located at the connection point with the rear wall portion 6B. The end of the horizontal conveying portion 9C on the vertical conveying portion 9B side is connected to the upper end of the vertical conveying portion 9B and is supported so as to be able to swing up and down. The grain discharge device 9 is configured to be able to rotate around a rotation axis extending in the vertical direction passing through the center of the vertical conveying portion 9B. With this configuration, the grain discharge device 9 is configured to be able to change its posture between a discharge operation position where the horizontal conveying portion 9C protrudes outward from the machine body and a storage position where the horizontal conveying portion 9C is located to the left of the threshing device 5 side, which is inside the machine body with respect to the grain tank 6. When the grain discharge device 9 is in the storage position, the horizontal conveying portion 9C is maintained in a posture in which it is received by a receiving portion 16 provided on the lateral outer side of the machine body of the driving portion 7.

[0041] [About the driving section] As shown in Figures 1 and 2, the driver's seat 7 is provided with a driver's seat 31, a front panel 32 in front of the driver's seat 31, and a side panel 33 on one side (left side) of the driver's seat 31 in the left-right direction of the machine body. Although not described in detail, the front panel 32 and the side panel 33 are provided with a plurality of operating tools such as a steering lever. The front panel 32 is provided in front of the driver's seat 31. The side panel 33 is provided on the side where the transport unit 4 is located in the left-right direction of the machine body with respect to the driver's seat 31. The side panel 33 is provided with an upper plate 33a (see Figure 7) that constitutes an upper surface portion, and an exterior cover 33b that covers the upper plate 33a from above.

[0042] [About the engine room] 3, in addition to the engine E, the engine room ER accommodates an exhaust purification device 10 that purifies the exhaust of the engine E, a radiator 11 that dissipates heat from the engine coolant, and a cooling fan (not shown) that cools the radiator 11. The radiator 11 is provided on the right side of the engine E. A dust cover 12 is provided that covers the radiator 11 and the right side of the engine room ER from the right side in a state that allows ventilation and prevents the passage of dust.

[0043] [About the exhaust pipe] As shown in FIG. 1 and FIG. 2, an exhaust pipe 13 is provided to discharge exhaust gas after purification processing by the exhaust purification device 10. The exhaust pipe 13 is passed between the threshing device 5 and the grain tank 6 in a plan view. The exhaust pipe 13 extends upward from the exhaust purification device 10 and then extends rearward while inclining upward toward the rear. The exhaust pipe 13 extends in the front-rear direction from a position corresponding to the front of the threshing device 5 to a position corresponding to the rear of the threshing device 5, and is located above the threshing device 5 from a position corresponding to the front of the threshing device 5 to a position corresponding to the rear of the threshing device 5. The central portion of the exhaust pipe 13 in the front-rear direction is located below the bulging portion 6a of the grain tank 6 and overlaps with the bulging portion 6a in a plan view.

[0044] [Driver frame structure] 3 and 4, a driver's section frame 41 is provided upright on the vehicle body frame 1. The driver's section frame 41 includes a radiator frame 42, an engine bonnet frame 43, a dust cover frame 44, a first vertical frame 45, a second vertical frame 46, a third vertical frame 47, and a horizontal frame 48.

[0045] 7 and 8, the engine bonnet frame 43 has a rear frame 43a extending in the left-right direction of the vehicle body at the rear of the engine bonnet frame 43, a first upper frame 43b extending in the front-rear direction of the vehicle body and provided at the right end of the rear frame 43a, a second upper frame 43c extending forward in the front-rear direction of the vehicle body from the left-right central part of the rear frame 43a, and a third upper frame 43d extending in the front-rear direction of the vehicle body from a position between the first upper frame 43b and the second upper frame 43c of the rear frame 43a. The first upper frame 43b, the second upper frame 43c, and the third upper frame 43d cover the engine room ER from above, and support from below the top plate 34 (see FIG. 1) on which the driver's seat 31 is placed and supported.

[0046] 3, the radiator frame 42 is provided upright on the body frame 1 between the radiator 11 and the dustproof cover frame 44. A first upper frame 43b (see FIG. 7) provided on the right end portion of the engine bonnet frame 43 is connected to the upper portion of the radiator frame 42 via a stay (not shown).

[0047] The horizontal frame 48 is provided to extend in the left-right direction of the vehicle body at the rear of the driver's section 7. The horizontal frame 48 supports the cabin 8 via a cabin rear frame 58 provided at the rear side of the cabin 8.

[0048] The dustproof cover frame 44 is erected on the body frame 1 to the right of the radiator frame 42. The dustproof cover frame 44 extends to a height position corresponding to the upper surface of the horizontal frame 48. The upper end of the dustproof cover frame 44 is connected to the right end of the horizontal frame 48.

[0049] 3, 4, 7, and 8, the first vertical frame 45 supports the driver's section 7 and the rear of the cabin 8, and is erected on the aircraft frame 1 behind the driver's seat 31. The first vertical frame 45 is erected on the aircraft frame 1 at a position between the second vertical frame 46 and the dustproof cover frame 44, on the side where the dustproof cover frame 44 is located.

[0050] The first vertical frame 45 includes a rear vertical frame portion 45a, a front-rear frame 45b, and a support portion 45c. The rear vertical frame portion 45a is erected on the vehicle frame 1 and extends to a height position slightly lower than the lower surface of the horizontal frame 48. The front-rear frame 45b extends forward from the upper end of the rear vertical frame portion 45a and is provided between the upper end of the rear vertical frame portion 45a and the support portion 45c. The support portion 45c extends upward from the front portion of the front-rear frame 45b.

[0051] A connecting bracket 57a is fixed to an upper portion of the support portion 45c, and a connecting bracket 57b is fixed to the right side of the cabin rear frame 58, and the connecting bracket 57a on the support portion 45c side is bolted to the connecting bracket 57b on the cabin rear frame 58 side in a state of being abutted from the left side. With this configuration, the first vertical frame 45 supports the driver's section 7 and the cabin 8. A reinforcing frame 49 is provided across the rear vertical frame portion 45a and the longitudinal frame 45b.

[0052] The second vertical frame 46 is provided on one side in the left-right direction of the machine body (the left side) behind the driver's section 7 with respect to the first vertical frame 45. Specifically, the second vertical frame 46 is erected on the machine body frame 1 behind the left side portion of the side panel 33, and extends upward to a height position above the horizontal frame 48.

[0053] The second vertical frame 46 includes a lower vertical frame portion 46a and an upper vertical frame portion 46b. The lower vertical frame portion 46a is erected on the vehicle frame 1 and extends to a height position slightly above the upper plate 33a of the side panel 33. The upper vertical frame portion 46b is located on the left front side of the lower vertical frame portion 46a. The lower portion of the upper vertical frame portion 46b is supported on the upper portion of the lower vertical frame portion 46a via a connecting plate 46c. Specifically, the connecting plate 46c has a first plate 46c1 and a second plate 46c2. The first plate 46c1 is formed in an L-shape in a plan view and has two surfaces. One of the two surfaces of the first plate 46c1 is fixed to the left side surface of the lower vertical frame portion 46a. The other of the two surfaces of the first plate 46c1 extends in the left-right direction of the vehicle and supports the front surface of the upper vertical frame portion 46b. The second plate 46c2 is provided to extend in the left-right direction of the aircraft body, and its right end is fixed to the first plate 46c1. The second plate 46c2 supports the rear surface of the upper vertical frame portion 46b. In other words, the first plate 46c1 and the second plate 46c2 support the upper vertical frame portion 46b by sandwiching the front and rear of the upper vertical frame portion 46b between them.

[0054] The upper vertical frame portion 46b extends upward on the outer lateral side of one side (left side) in the left-right direction of the machine body of the driving unit 7 in a front view. A receiving portion 16 that supports the grain discharge device 9 in the storage position is supported on the upper portion of the upper vertical frame portion 46b.

[0055] The rear portion of the upper plate 33a of the side panel 33 is fixed with a bolt to a stay 52 provided on the upper portion of the lower vertical frame portion 46a.

[0056] A connecting frame 50 is provided to connect the first vertical frame 45 and the second vertical frame 46 at a height position above the horizontal frame 48. The connecting frame 50 is provided to extend in the left-right direction of the aircraft rearward of the cabin 8, and connects the first vertical frame 45 and the second vertical frame 46 at a height position above the side panel 33. An end of the connecting frame 50 on the first vertical frame 45 side is fixed to an upper end of the support portion 45c of the first vertical frame 45 with a bolt. An end of the connecting frame 50 on the second vertical frame 46 side is fixed to a stay 51 provided on the upper vertical frame portion 46b of the second vertical frame 46 with a bolt.

[0057] The connecting frame 50 has a bent portion 50a between a connecting portion with the first vertical frame 45 and a connecting portion with the second vertical frame 46, which is bent so as to bypass the driver's section 7. Specifically, the bent portion 50a is configured to be bent from a position corresponding to the rear of the driver's section 7 and the left side of the cabin 8 so as to be positioned toward the front of the aircraft as it approaches the left side of the aircraft.

[0058] An oblique frame portion 54 is provided between the second vertical frame 46 and the vehicle frame 1, connecting them. The oblique frame portion 54 is provided from a position laterally outward on one side (left side) in the vehicle left-right direction from the erected position of the lower vertical frame portion 46a on the vehicle frame 1 to an upper portion of the lower vertical frame portion 46a. An upper end portion of the oblique frame portion 54 is fixed with a bolt to a stay 53 provided on the upper portion of the lower vertical frame portion 46a.

[0059] The third vertical frame 47 is located behind the driver's station 7, between the first vertical frame 45 and the second vertical frame 46 in a front view, and is erected on the vehicle frame 1. The third vertical frame 47 extends upward to a height position corresponding to the upper plate 33a of the side panel 33. The upper end of the third vertical frame 47 is fixed to the rear part of the upper plate 33a of the side panel 33 with bolts. With this configuration, the side panel 33 is supported by the third vertical frame 47.

[0060] The third vertical frame 47 supports a left portion of the rear frame 43a of the engine bonnet frame 43. A connecting bracket 55a fixed to an upper portion of the third vertical frame 47 is provided on the third vertical frame 47, and a connecting bracket 55b fixed to a left portion of the rear frame 43a is provided on the engine bonnet frame 43. The third vertical frame 47 and the rear frame 43a are fixed with bolts in a state in which the connecting bracket 55a on the third vertical frame 47 side is abutted against the connecting bracket 55b on the engine bonnet frame 43 side from behind.

[0061] The first vertical frame 45 is provided with a connecting bracket 56a fixed to the vertical middle portion of the first vertical frame 45, and the engine bonnet frame 43 is provided with a connecting bracket 56b fixed to the right portion of the rear frame 43a. The first vertical frame 45 and the rear frame 43a are fixed with bolts in a state in which the connecting bracket 56a on the first vertical frame 45 side is abutted against the connecting bracket 56b on the engine bonnet frame 43 side from the rear. With this configuration, the rear frame 43a is provided across the third vertical frame 47 and the first vertical frame 45.

[0062] Here, a precleaner 15 is provided above the air cleaner 14. As shown in Figs. 3, 7, and 8, the precleaner 15 is supported by the connecting frame 50. The precleaner 15 is provided so as to overlap the front part of the bulging portion 6a in front and side views (see Figs. 3 and 4). The air cleaner 14 is connected by a rubber air intake pipe 61. The precleaner 15 and the air intake pipe 61 are connected via a metal connecting pipe 62. With this configuration, the air cleaner 14 and the precleaner 15 are connected in communication with each other by the air intake pipe 61. The connecting pipe 62 is provided with a connecting bracket 63a fixed to a right part of the connecting pipe 62, and the connecting frame 50 is provided with a connecting bracket 63b fixed to the center side in the left-right direction. The precleaner 15 and the connecting frame 50 are fixed by bolts with the connecting bracket 63a on the connecting pipe 62 side abutted against the connecting bracket 63b on the connecting frame 50 side from the front.

[0063] The first vertical frame 45, the second vertical frame 46, the third vertical frame 47, the horizontal frame 48, and the connecting frame 50, etc. are located behind the operating section 7 and can be easily accessed by swinging the grain tank 6 to the maintenance position, making it easy to perform bolt fastening and unlocking operations.

[0064] [Regarding the receiving part] The receiving portion 16 supported by the upper portion of the second vertical frame 46 includes a main body portion 16A formed in a U-shape at the upper end portion, and a connecting portion 16B that connects to the upper end portion of the second vertical frame 46. A tip portion 16Aa of the main body portion 16A formed in a U-shape on the side where the cabin 8 is located is attached at an angle to the left-right direction of the aircraft so as to be located closer to the front of the aircraft than a tip portion 16Ab on the opposite side.

[0065] Of the U-shaped main body portion 16A, the tip portion 16Aa on the side where the cabin 8 is located extends upward to a height position higher than the tip portion 16Ab on the opposite side, and extends to a height position slightly lower than the height position of the upper end portion of the cabin 8.

[0066] [Another embodiment] The following are examples of other embodiments in which the above-described embodiment has been modified. The following embodiments may be combined with each other and applied to the above-described embodiment, provided that no contradiction occurs. Note that the scope of the present invention is not limited to the contents of each embodiment.

[0067] (1) In the above embodiment, a configuration has been described in which the threshing device 5 is provided behind the driving unit 7, i.e., on the left side of the machine body in the left-right direction, and the grain tank 6 is provided adjacent to the right of the threshing device 5, i.e., on the right side of the machine body in the left-right direction. However, the present invention is not limited to the above embodiment, and for example, a configuration in which the threshing device 5 is provided on the right side of the machine body in the left-right direction, and the grain tank 6 is provided on the left side of the machine body in the left-right direction, is also acceptable.

[0068] (2) In the above embodiment, the receiving portion 16 is described as being supported by the second vertical frame 46, but the present invention is not limited to the above embodiment. For example, the receiving portion 16 may be supported by the cabin 8.

[0069] (3) In the above embodiment, the front planar portion 6b and the rear planar portion 6c are configured to be at the same distance from the center position of the grain tank 6 in the left-right direction of the body. However, the present invention is not limited to the above embodiment. For example, the front planar portion 6b and the rear planar portion 6c may be configured to be at different distances from the center position of the grain tank 6 in the left-right direction of the body.

[0070] (4) In the above embodiment, the front plane portion 6b is provided with the first inspection opening 21a formed in a rectangular shape, and the first cover body 21b switchable between a closed state for closing the first inspection opening 21a and an open state for opening the first inspection opening 21a, and the rear plane portion 6c is provided with the second inspection opening 22a formed in a rectangular shape, and the second cover body 22b switchable between a closed state for closing the second inspection opening 22a and an open state for opening the second inspection opening 22a. However, the present invention is not limited to the above embodiment. For example, the first inspection opening 21a and the second inspection opening 22a may be formed in a shape other than a rectangular shape (for example, a circular shape, etc.). Also, a configuration in which either the first inspection opening 21a or the second inspection opening 22a is not provided may be used.

[0071] (5) In the above embodiment, a configuration has been described in which the bending start point 9Aa on the upstream side of the bending portion 9A of the grain discharge device 9 in the conveying direction is located at the connection point with the rear wall portion 6B. However, the present invention is not limited to the above embodiment. For example, the bending start point 9Aa on the upstream side of the bending portion 9A in the conveying direction may be configured to be located forward or rearward in the fore-and-aft direction of the machine body relative to the rear wall portion 6B.

[0072] (6) In the above embodiment, the precleaner 15 is configured to overlap the front portion of the bulge 6a in front and side views. However, the present invention is not limited to the above embodiment. For example, the downstream end of the exhaust pipe 13, instead of the precleaner 15, may be configured to overlap the front portion of the bulge 6a in front and side views.

[0073] (7) In the above embodiment, the air cleaner 14 and the precleaner 15 are connected to each other by a rubber air intake pipe 61, and the precleaner 15 is supported by the connecting frame 50. However, the present invention is not limited to the above embodiment. For example, as shown in FIG. 9, the air cleaner 14 and the precleaner 15 may be connected to each other by a resin air intake pipe 65, and the precleaner 15 may be supported by the threshing device 5. In this case, the precleaner 15 and the air intake pipe 65 are connected to each other by a metal connecting pipe 66. The air intake pipe 65 is provided with a connecting bracket 67a integrally formed on the left side of the air intake pipe 65, and a connecting bracket 67b fixed to the right side of the threshing device 5 is provided. The connecting bracket 67a on the connecting pipe 66 side and the connecting bracket 67b on the threshing device 5 side are fixed to each other by bolts with a rubber mount 67c sandwiched therebetween. With this configuration, the air intake pipe 65 can be made of generally inexpensive resin instead of rubber, thereby reducing costs. Furthermore, by providing a rubber mount 67c between the connecting bracket 67a and the connecting bracket 67b, the vibrations of the threshing device 5, which have a different period from the vibrations of the engine E, are reduced from being transmitted to the air intake pipe 65, thereby making it possible to reduce damage to the air intake pipe 65 caused by two vibrations of different periods being transmitted to the air intake pipe 65. [Industrial Applicability]

[0074] The present invention can be used not only in head-feeding combine harvesters but also in normal combine harvesters. [Explanation of symbols]

[0075] 5: Threshing equipment 6: Grain tank 6B: Rear wall part 6L: Left side wall (side wall) 6a: Swelling part (first part) 6b: Front plane part (second part) 6c: Rear plane part (third part) 9: Grain discharge device 9A: Bent part 9Aa: Beginning of bend 9B: Vertical conveying section 15: Precleaner 17: Grain frying equipment 21a: First inspection gate 21b: First lid body 22a: Second inspection hatch 22b: Second lid body Q: Vertical recess E: Engine

Claims

1. A threshing device for threshing the harvested crops; A grain tank arranged side by side with the threshing device and storing the grains obtained by the threshing device; A lifting device is provided in the space between the threshing device and the grain tank in a vertical direction, and transports the grain obtained by the threshing device from the lower part of the threshing device to the upper part of the grain tank. The grain tank is provided with a first portion provided in a front upper portion of the side wall portion on the side where the threshing device is located, the first portion being provided adjacent to the first portion and the second portion being provided adjacent to the first portion. The first portion is configured to bulge toward the threshing device relative to the second portion, The side of the threshing device at the front of the first section and the front of the second section is configured to be farther away from the threshing device toward the front of the aircraft only at the front of the first section, A precleaner is provided to purify the outside air supplied to the engine. A combine harvester, wherein the precleaner is provided so as to overlap a front portion of the first portion in a front view and a side view.

2. A threshing device for threshing the harvested crops; A grain tank is provided next to the threshing device and stores the grain obtained by the threshing device. The grain tank is provided with a first portion provided at the front upper portion of the side wall portion on the side where the threshing device is located, and a second portion provided adjacent to and below the first portion, The first portion is configured to bulge toward the threshing device relative to the second portion, The side of the threshing device at the front of the first section and the front of the second section is configured to be farther away from the threshing device toward the front of the aircraft only at the front of the first section, A lifting device is provided to transport the grains obtained by the threshing device from the lower part of the threshing device to the upper part of the grain tank, A vertical recessed portion is provided in the front-rear intermediate portion of the side wall portion, extending from the lower portion to the upper portion of the side wall portion and recessed toward the inside of the grain tank, The lifting device is provided in the space between the threshing device and the grain tank in a state along the vertical direction and in a state of entering the vertical recess, A third portion is provided on the side wall portion rearward of the vertical recess, A combine harvester in which the third portion is configured so that the distance from the center position of the grain tank in the left-right direction of the body to the third portion is the same as the distance from the center of the grain tank to the second portion in the left-right direction of the body.

3. The second portion is provided with a first inspection opening and a first lid body switchable between a closed state that closes the first inspection opening and an open state that opens the first inspection opening, The combine harvester according to claim 1 or 2, wherein the first inspection opening is formed so as to extend from the front to the rear of the second portion and from the top to the bottom of the second portion.

4. The third portion is provided with a second inspection opening and a second lid body switchable between a closed state for closing the second inspection opening and an open state for opening the second inspection opening, The combine harvester according to claim 2 , wherein the second inspection opening is formed so as to extend from the front to the rear of the third portion and from the top to the bottom of the third portion.

5. A grain discharge device is provided to discharge the grains stored in the grain tank, The grain tank has a rear wall portion extending along the vertical direction of the machine body, The grain discharge device has a bending portion connected to a lower portion of the rear wall portion and bending from the horizontal direction to an upward direction from the rear wall portion toward the downstream side in the conveying direction, and a vertical conveying portion connected to a conveying end point of the bending portion and extending upward along the vertical direction of the machine body, The combine harvester according to claim 1 , wherein a bending start point of the bending portion on an upstream side in the conveying direction is located at a connection point with the rear wall portion.

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