Combine

Abstract

To provide a combine that allows maintenance and inspection work of a reaping device to be performed safely by preventing contact with a conveyance device for conveying grain culms.SOLUTION: A spindle 31 extending in a vertical direction is provided in a machine body frame. A transmission cylinder extending in a right-left direction, which contains a rotation shaft to which output rotation of an engine is transmitted, is provided in the rear part of a reaping frame of a reaping device. A conveyance device for conveying grain culms along a threshing port of a thresher is provided on the left part of the thresher. A reaping arm for supporting the left part of the transmission cylinder and a conveyance arm for supporting the front part of the conveyance device are provided rotatably at the spindle 31. An arc-shaped groove 48 extending in a circumferential direction is formed at a position separated by a predetermined radius from a shaft center of the spindle 31 in a lower arm 42A of the conveyance arm. A pin 47 extending in a vertical direction that is inserted into the groove 48 is provided in an arm 32B of the reaping arm. In a plane view, when the reaping arm 32 is rotated anti-clockwise most around the shaft center of the spindle 31, the pin 47 abuts against an anti-clockwise end part of the groove 48.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a combine harvester having a conveying device that conveys stalks along the threshing opening of a harvesting device and a threshing device. [Background technology]

[0002] A technique is known in which the rear of the reaping device is rotatably fixed to a vertically extending shaft provided on the left side of the machine frame, and during maintenance and inspection work, the reaping device is rotated around the axis of the shaft to ensure a maintenance and inspection work space behind the reaping device (Patent Document 1). A technology is known in which a transport device that transports stalks along the rear of the harvesting device and the threshing device's threshing opening is rotatably fixed to a vertically extending support shaft provided on the left side of the machine frame, and during maintenance and inspection work on the harvesting device, the harvesting device is rotated around the axis of the support shaft to ensure a maintenance and inspection work space behind the harvesting device, and during maintenance and inspection work on the transport device, the transport device is rotated around the axis of the support shaft to ensure a maintenance and inspection work space to the right of the transport device (Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-243996 A [Patent Document 2] JP 2018-14937 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the techniques of Patent Documents 1 and 2, there is a risk that during maintenance and inspection work on the harvesting device, the conveying device rotates about the axis of the support shaft, causing the front part of the conveying device to come into contact with the operator.

[0005] Therefore, the present invention aims to provide a combine harvester that can safely perform maintenance and inspection work on the harvesting equipment by preventing contact between the operator and the conveying device that transports the stalks along the threshing device's threshing opening during maintenance and inspection work on the harvesting equipment. [Means for solving the problem]

[0006] The present invention which has solved the above problems is as follows.

[0007] That is, the invention described in claim 1 is a combine harvester having a harvesting device (3) for harvesting stalks on the front side of a machine frame (1) on which an engine is mounted, and a threshing device (4) for threshing the stalks on the rear side of the harvesting device (3), A vertically extending support shaft (31) is provided on the machine frame (1), a left-right extending transmission tube (11) is provided at the rear of the reaping frame (10) of the reaping device (3) and a conveying device (50) is provided at the left of the threshing device (4) for conveying stalks along the threshing opening of the threshing device (4). The transmission tube (11) is provided on the support shaft (31). A reaping arm (32) supporting the left portion of the transmission tube (11) and a transport arm (33) supporting the front portion of the transport device (50) are rotatably provided, and the reaping arm (32) is formed of a cylindrical body (32A) fitted onto the support shaft (31), an arm (32B) extending from the cylindrical body (32A) toward the left portion of the transmission tube (11), and a support portion (32C) at the tip of the arm (32B) supporting the left portion of the transmission tube (11). the conveying arm (33) is formed of a lower arm (42A) located below the cylindrical body (32A) and fitted onto the shaft (31), an upper arm (42B) located above the cylindrical body (32A) and fitted onto the shaft (31), and a connecting member (42C) connecting the tip ends of the lower arm (42A) and the upper arm (42B), a circular arc-shaped groove (48) extending circumferentially is formed in the lower arm (42A) at a position spaced a predetermined radius from the axis of the shaft (31), and a pin (47) extending in the vertical direction and inserted into the groove (48) is provided in the arm (32B), and when the harvesting arm (32) is rotated most counterclockwise around the axis of the shaft (31) in a plan view, the pin (47) abuts against the counterclockwise end of the groove (48).

[0008] The invention described in claim 2 is a combine described in claim 1, in which, when viewed in a plan view, when the transport arm (33) is rotated most clockwise around the axis (31), the pin (47) abuts against the counterclockwise end of the groove (48).

[0009] The invention described in claim 3 is the combine described in claim 1 or 2, wherein the arm (32B) is provided with a biasing means (47B) for biasing the pin (47) in a counterclockwise direction of the groove (48).

[0010] The invention described in claim 4 is a combine described in claim 1 or 2, in which, in a plan view, the support shaft (31) is provided on the left side of the front-rear frame (1A) that is located at the leftmost side of the body frame (1), and the axis of the support shaft (31) is positioned on an extension line of the axis of the transmission cylinder (11).

[0011] The invention described in claim 5 is a combine harvester of claim 1 in which, in a side view, a drive sprocket (52) that drives the feed chain (51) of the conveying device (50) is positioned above the counter shaft (60) to which the output rotation of the engine is transmitted, and a plate-shaped oil guard (62) is provided between the drive sprocket (52) in the vertical direction, and in a plan view, an upper part of a counter pulley (61) supported on the left part of the counter shaft (60) is covered with the oil guard (62).

[0012] The invention described in claim 6 is the combine harvester described in claim 5, wherein the oil guard (62) is provided with an upward rear incline in side view. Effect of the Invention

[0013] According to the present invention, when the mowing device (3) is placed in an open position via the mowing arm (32) to perform maintenance and inspection work on the mowing device (3), the rotation of the transport arm (33) is restricted, so that the maintenance and inspection work on the mowing device (3) can be performed safely. [Brief description of the drawings]

[0014] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 4 is a plan view of the essential parts of the reaping device in a stored position. [Figure 4] FIG. 4 is a plan view of the essential parts of the reaping device in an open position. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 4 is a front view illustrating a pin and a groove that regulate the movement of the reaping device. [Figure 9] FIG. 13 is a bottom view illustrating the pins and grooves that regulate the movement of the reaping device. [Figure 10] 4 is a perspective view of a main part with the mowing arm in a stored position. FIG. [Figure 11] FIG. 4 is a plan view of the main parts with the mowing arm in a stored position. [Figure 12] 4 is a perspective view of a main part with the mowing arm in an open position. FIG. [Figure 13] FIG. 4 is a plan view of the main parts with the mowing arm in an open position. [Figure 14] This is an oblique view of the main parts of the threshing device with the conveying device in the stored position. [Figure 15] This is a plan view of the main parts of the threshing device with the conveying device in the stored position. [Figure 16] This is an oblique view of the main parts of the threshing device with the conveying device in the open position. [Figure 17] This is a plan view of the main parts of the threshing device with the conveying device in the open position. [Figure 18] A side view of the front part of the threshing and conveying device. [Figure 19] FIG. 2 is a plan view of the front part of the threshing and conveying device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] As shown in Figures 1 and 2, a combine harvester has a traveling device 2 consisting of a pair of left and right crawlers that travels on the soil surface on the underside of a body frame 1, a harvesting device 3 that harvests grain stalks in the field is provided on the front side of the body frame 1, a threshing device 4 that threshes and sorts the harvested grain stalks is provided on the rear left side of the harvesting device 3, and a control unit 5 on which an operator rides is provided on the rear right side of the harvesting device 3.

[0016] Below the control unit 5 is an engine room 6 in which an engine is mounted, and behind the control unit 5 is a grain tank 7 in which threshed and sorted grains are stored, and behind the grain tank 7 is a discharge auger 8 consisting of a vertically extending grain lifting section and a horizontal discharge section extending back and forth to discharge grains to the outside.

[0017] The reaping frame 10 of the reaping device 3 is formed of a transmission tube 11 extending in the left-right direction to transmit the output rotation of the engine, a transmission tube 12 extending forward from the right part of the transmission tube 11, a transmission tube 13 extending in the left-right direction from the lower part of the transmission tube 12, a transmission tube 14 extending in the up-down direction from the left part of the transmission tube 13, and a transmission tube 15 extending in the left-right direction from the upper part of the transmission tube 14. The transmission tubes 11 to 15 are provided with a filling port for filling with crust that smoothly rotates the rotating shaft that transmits the output rotation of the engine.

[0018] The harvesting frame 10 is fitted with a harvesting body 16 for harvesting the culms planted in the field, a lifting device 17 for raising the harvested culms, a cutting blade device 18 for cutting the base of the raised culms, and a transport device 19 for clamping the harvested culms and transporting them to the threshing device 4.

[0019] As shown in Figures 3 and 4, a support device 20 that supports the transmission tube 11 of the mowing frame 10 is provided on the front left side of the machine body frame 1. The support device 20 is formed of a left support device 21 that supports the left part of the transmission tube 11, and a right support device 22 that supports the right part of the transmission tube 11. Note that the mowing device 3 in Figure 3 is illustrated in a stored position in which the mowing arm 32 is rotated clockwise around the axis of the support shaft 31 of the left support device 21 to move the mowing device 3 to the front side of the machine body frame 1, and the mowing device 3 in Figure 4 is illustrated in an open position in which the mowing arm 32 is rotated counterclockwise around the axis of the support shaft 31 of the left support device 21 to move the mowing device 3 to the front left side of the machine body frame 1.

[0020] As shown in Figures 5 to 7, the left support device 21 is formed from a fixed part 30 attached to the machine frame 1, a support shaft 31 extending upward from the upper surface of the fixed part 30, a cutting arm 32 rotatably attached to the support shaft 31, and a transport arm 33 rotatably attached to the support shaft 31.

[0021] In a plan view, the support shaft 31 is provided to the left of the front-rear frame 1A extending in the front-rear direction and provided at the leftmost part of the machine body frame 1 in the left-right direction, and is provided on an axis extending in the left-right direction of the transmission tube 11 of the mowing device 3 in the front-rear direction. This makes it possible to remove the right part of the transmission tube 11 from the right support device 22 and rotate the mowing arm 32 about the axis of the support shaft 31 to ensure a wide working space behind the mowing device 3, and to easily perform maintenance and inspection work on the mowing device 3.

[0022] The harvesting arm 32 is formed of a cylindrical body 32A fitted onto the support shaft 31, an arm 32B extending upward to the right from the body 32A, and a support part 32C supporting the outer periphery of the left part of the transmission tube 11 provided on the upper part of the arm 32B. The body 32A is provided with a filling port for filling with grease for smoothly rotating the body 32A around the support shaft 31.

[0023] The arm 32B is formed of a lower arm 40A extending from the lower part of the support shaft 31 toward the upper right side, an upper arm 40B extending from the upper part of the cylinder 32A toward the upper right side, a vertical connecting member 40C connecting the lower part of the lower arm 40A and the upper arm 40B in the vertical direction, a vertical connecting member 40D connecting the upper part of the lower arm 40A and the upper arm 40B in the vertical direction, a horizontal connecting member 40E connecting the cylinder 32A and the vertical connecting member 40C in the left-right direction, and a horizontal connecting member 40F connecting the upper part of the lower arm 40A and the upper arm 40B in the left-right direction. This reduces the weight of the arm 32B and increases its rigidity, thereby suppressing deformation during opening and closing.

[0024] The support portion 32C is formed by a right support portion 41R provided on an upper portion of the lower arm 40A, and a left support portion 41L provided on an upper portion of the upper arm 40B.

[0025] The left support part 41L is divided into a substantially semicircular arc shape in the front-rear direction and is connected by a left connecting member 41A provided in the vertical direction of the left support part 41L. The right support part 41R is divided into a substantially semicircular arc shape in the front-rear direction and is connected by a right connecting member 41B provided in the vertical direction of the right support part 41R. This allows the left part of the transmission tube 11 to be firmly gripped, and also allows the left part of the transmission tube 11 to be easily attached and detached. In addition, the left connecting member 41A and the right connecting member 41B are connected by a horizontal connecting member 41C extending in the left-right direction. This allows the left support part 41L and the right support part 41R to be easily aligned, and also increases rigidity to suppress deformation during opening and closing.

[0026] When viewed from the front, the left support part 41L and the right support part 41R are provided offset to the right of the support shaft 31. This allows the cutting arm 32 to rotate about the axis of the support shaft 31, ensuring a large working space behind the cutting device 3, making it easy to perform maintenance and inspection work on the cutting device 3.

[0027] The transport arm 33 is formed of a lower arm 42A having a substantially triangular shape in plan view that is fitted onto the lower part of the support shaft 31, an upper arm 42B having a substantially triangular shape in plan view that is fitted onto the upper part of the support shaft 31, and a connecting member 42C extending in the vertical direction that connects the left parts of the lower arm 42A and the upper arm 42B. The front part of a transport device 50 that transports the stalks along the threshing opening of the threshing device 4 is attached to the connecting member 42C.

[0028] The right support device 22 is formed from a fixed part 35 that is attached to the body frame 1, an arm 36 that extends upward from the upper surface of the fixed part 35, and a support part 37 that supports the outer periphery of the right part of the transmission tube 11 provided on the upper part of the arm 36.

[0029] The support portion 37 is divided into a generally semicircular arc shape in the front-rear direction, and is connected by a connecting member 44 provided in the up-down direction of the support portion 37. A connecting handle 45 extending rearward beyond the upper connecting member 44 is attached to the upper connecting member 44. This allows the upper connecting member 44 to be pressed against the lower connecting member 44, so that the right portion of the transmission tube 11 can be firmly gripped by the upper connecting member 44 and the lower connecting member 44, and also makes it easy to attach and detach the right portion of the transmission tube 11.

[0030] The upper portions of the rib 30A erected at the rear of the fixing portion 30 of the left support device 21 and the rib 35A erected at the rear of the fixing portion 35 of the right support device 22 are connected by a pipe member 38 extending in the left-right direction. The left portion of the pipe member 38 is fixed to the machine frame 1 via the left fixing portion 38L, and the right portion of the pipe member 38 is fixed to the machine frame 1 via the right fixing portion 38R. This increases the rigidity of the left support device 21 and the right support device 22, thereby suppressing deformation of the left support device 21 and the right support device 22. The left surface of the rib 30A is provided with a plate-shaped stopper 46 that comes into contact with the upper arm 42B in order to suppress excessive rotation of the transport arm 33.

[0031] An L-shaped pin 47 is provided in the opening of the lower arm 40A of the harvesting arm 32 so that it can slide vertically, and an arc-shaped groove 48 is formed opposite the pin 47 on the lower arm 42A of the transport arm 33, at a position spaced a predetermined radius from the axis of the support shaft 31.

[0032] 8 and 9, the lower part of pin 47 is inserted from the top to the bottom through groove 48 of lower arm 42A. The lower part of pin 47 is formed with thin-diameter portion 47A that is thinner than the upper part, and a ring member 49 such as a washer is attached to the bottom of thin-diameter portion 47A. This makes it possible to prevent the lower part of pin 47 from moving along groove 48 and coming out of groove 48 when reaping arm 32 is rotated around the axis of support shaft 31 from the stored position to the open position, etc.

[0033] The groove 48 is formed at a central angle of 60 degrees around the axis of the support shaft 31. This makes it possible to prevent the reaping arm 32 from rotating excessively around the axis of the support shaft 31. It is also preferable to form an opening 48A on the counterclockwise side of the groove 48, the opening 48A having a diameter larger than the width of the groove 48, and to provide a biasing means 47B, such as a leaf spring, on the upper part of the pin 47 for biasing the pin 47 in the counterclockwise direction. It is also preferable to form the central angle of the groove 48 at 45 to 75 degrees.

[0034] In this specification, the position of the cutting arm 32 when it is rotated most clockwise around the axis of the support shaft 31 as shown in Figures 10 and 11 is referred to as the stored position, and the position of the cutting arm 32 when it is rotated most counterclockwise around the axis of the support shaft 31 as shown in Figures 12 and 13 is referred to as the open position.

[0035] 14 and 15, the position of the transfer arm 33 when it is rotated most counterclockwise around the axis of the support shaft 31 is called the stored position, and as shown in Figures 16 and 17, the position of the transfer arm 33 when it is rotated most clockwise around the axis of the support shaft 31 is called the open position. The front part of the support pipe 58 of the transfer device 50 is attached to the left surface of the connecting member 42C of the transfer arm 33.

[0036] When the reaping arm 32 is rotated to the open position, the pin 47 moves counterclockwise along the groove 48 and abuts against one end of the groove 48 on the counterclockwise side. This restricts the transfer arm 33 from rotating from the stored position to the open position, and moves the transfer device 50 attached to the transfer arm 33 from the stored position to the open position. Also, when the reaping arm 32 is rotated to the stored position, the pin 47 moves clockwise along the groove 48 and abuts against the other end of the groove 48 on the clockwise side. This releases the restriction described above, allowing the transfer arm 33 to rotate from the stored position to the open position, and the transfer device 50 to move from the stored position to the open position.

[0037] When the transport arm 33 is rotated to the open position, the lower arm 42A rotates clockwise around the support shaft 31 and one end portion on the counterclockwise side of the groove 48 abuts against the pin 47. This restricts the rotation of the mowing arm 32 from the stored position to the open position, and restricts the movement of the mowing device 3 supported by the mowing arm 32 from the stored position to the open position. Also, when the transport arm 33 is rotated to the stored position, the lower arm 42A rotates counterclockwise around the support shaft 31 and one end portion on the clockwise side of the groove 48 abuts against the pin 47. This releases the above-mentioned restriction, and the mowing arm 32 can be rotated from the stored position to the open position, and the mowing device 3 supported by the mowing arm 32 can be moved from the stored position to the open position.

[0038] As shown in FIG. 18, the feed chain 51 of the conveying device 50 is wound around the driving sprocket 52, the front tensioning wheel 53, and the rear tensioning wheel (not shown). When the feed chain 51 moves from the front tensioning wheel 53 to the rear tensioning wheel, it moves from the front to the rear on the upper surface of the upper chain rail 54, and when it moves from the rear tensioning wheel to the front tensioning wheel 53, it moves from the rear to the front on the upper surface of the lower chain rail 55. Also, as shown in FIG. 1, a clamping rod 4B, which is biased downward by a biasing means 4A such as a spring, is pressed on the upper part of the feed chain 51. This allows the clamping rod 4B and the feed chain 51 to clamp the stalk and transport the stalk along the threshing mouth of the threshing device 4. Also, a curved portion 55A extending toward the driving sprocket 52 is formed at the front part of the lower chain rail 55. This allows the feed chain 51 moving on the upper surface of the lower chain rail 55 to be efficiently guided to the drive sprocket 52.

[0039] The upper chain rail 54 and the lower chain rail 55 are connected by a rail connecting member 56, and the lower chain rail 55 is attached to the rear of a support pipe 58 via a connecting member 57. The front of the support pipe 58 is attached to the left surface of the connecting member 42C of the transfer arm 33. The support pipe 58 extends rearward from the front and is formed with an upward tilt at the rear, and the middle part of the upward tilt at the rear is disposed on the left side of the counter shaft 60 to which the output rotation of the engine is transmitted. As a result, when the transfer arm 33 is rotated clockwise about the axis of the support shaft 31 to move from the stored position to the open position, the rear of the transfer device 50 moves to the left as shown in FIG. 17, making it easy to perform maintenance and inspection work on the feed chain 51, etc.

[0040] A counter pulley 61 is supported on the left side of the counter shaft 60. A rectangular oiling card 62 is provided between the drive sprocket 52 and the counter pulley 61. This makes it possible to prevent oil applied to the feed chain 51 from dropping and adhering to the counter shaft 60. The counter pulley 61 is provided below the drive sprocket 52. The output rotation of the counter shaft 60 is transmitted to the drive sprocket 52, and is also transmitted to a grain lifting device (not shown) that transports grains threshed and sorted by the threshing device 4 to the grain tank 7 via the counter pulley 61 and a belt wound around the counter pulley 61. The oil card 62 is formed with a gentle upward incline towards the rear. A hanging portion is formed at the front portion of the oil card 62 located forward of the counter shaft 60. This makes it possible to further prevent oil injected into the feed chain 51 from dropping and adhering to the counter shaft 60. A rising portion is formed at the rear portion of the oil card 62 located rearward of the curved portion 55A of the lower chain rail 55. This makes it possible to prevent oil adhering to the lower chain rail 55 from dropping and adhering to the counter shaft 60.

[0041] Reference numeral 65 denotes a tension sprocket that adjusts the tension of the feed chain 51, reference numeral 66 denotes a pulley supported on the output shaft of a continuously variable transmission that increases or decreases the output rotation of the engine, and reference numeral 67 denotes a tension pulley that adjusts the tension of the belt.

[0042] 19, the oil card 62 is formed to extend further forward and backward and left and right than the drive sprocket 52, and further forward and left and right than the counter pulley 61. This covers the upper side of the counter pulley 61, and further prevents oil lubricated to the feed chain 51 from dropping and adhering to the counter shaft 60. When the transport arm 33 is in the stored position, it is preferable to abut the right surface of the outer cover (not shown) of the transport device 50 against the upper chain rail 54 via an elastic member. This makes it possible to suppress vibrations occurring in the transport device 50. [Explanation of symbols]

[0043] 1 Aircraft frame 3 Reaping device 4. Threshing Equipment 10. Reaping Frame 11 Transmission tube 31 Spindle 32 Harvesting arm 32A cylinder 32B Arm 32C Support part 33 Transport arm 42A Lower Arm 42B Upper arm 42C Connecting member 47 pin 47B Actuating means 48 Groove 50 Transport device 51 Feed Chain 52 Drive sprocket 60 Counter shaft 62 Oil Guard

Claims

1. A combine harvester having a harvesting device (3) for harvesting stalks on the front side of a machine frame (1) on which an engine is mounted, and a threshing device (4) for threshing the stalks on the rear side of the harvesting device (3), A support shaft (31) extending in the vertical direction is provided on the machine body frame (1), A transmission cylinder (11) extending in the left-right direction and housing a rotating shaft to which the output rotation of the engine is transmitted is provided at the rear of the mowing device (3) of the mowing frame (10), A conveying device (50) is provided on the left side of the threshing device (4) to convey the stalks along the threshing opening of the threshing device (4), A reaping arm (32) supporting a left portion of the transmission tube (11) and a conveying arm (33) supporting a front portion of the conveying device (50) are rotatably provided on the support shaft (31); The reaping arm (32) is formed of a cylindrical body (32A) fitted onto the support shaft (31), an arm (32B) extending from the cylindrical body (32A) toward the left part of the transmission tube (11), and a support part (32C) at the tip of the arm (32B) for supporting the left part of the transmission tube (11), the transport arm (33) is formed of a lower arm (42A) positioned below the cylindrical body (32A) and fitted onto the support shaft (31), an upper arm (42B) positioned above the cylindrical body (32A) and fitted onto the support shaft (31), and a connecting member (42C) connecting tip ends of the lower arm (42A) and the upper arm (42B), a groove (48) having a circular arc shape extending in a circumferential direction is formed in the lower arm (42A) at a position spaced a predetermined radius from the axis of the support shaft (31); The arm (32B) is provided with a pin (47) extending in the vertical direction and inserted into the groove (48), A combine harvester characterized in that, when viewed in a plan view, when the cutting arm (32) is rotated most counterclockwise around the axis (31), the pin (47) abuts against the counterclockwise end of the groove (48).

2. A combine harvester as described in claim 1, wherein, in a plan view, when the transport arm (33) is rotated most clockwise around the axis (31), the pin (47) abuts against the counterclockwise end of the groove (48).

3. 3. A combine harvester according to claim 1 or 2, wherein the arm (32B) is provided with a biasing means (47B) for biasing the pin (47) in a counterclockwise direction of the groove (48).

4. A combine harvester as described in claim 1 or 2, wherein, in a plan view, the support shaft (31) is provided on the left side of the front / rear frame (1A) located at the leftmost side of the body frame (1), and the axis of the support shaft (31) is positioned on an extension line of the axis of the transmission cylinder (11).

5. In a side view, a drive sprocket (52) for driving a feed chain (51) of the conveying device (50) is disposed above a counter shaft (60) to which the output rotation of the engine is transmitted, and a drive sprocket (52) is disposed between the drive sprockets (52) in the vertical direction. A plate-shaped oil guard (62) is provided, 2. The combine harvester of claim 1, wherein an upper portion of a counter pulley (61) supported on a left portion of the counter shaft (60) is covered with an oil guard (62) in a plan view.

6. 6. The combine harvester according to claim 5, wherein the oil guard (62) is provided with an upwardly sloping rearward angle in a side view.

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