Combine

The combine harvester's innovative tension mechanism with a swingable arm and handle simplifies belt removal, enhancing operational efficiency by allowing one-handed tension application and release, thus improving maintenance workability.

JP2025005913AActive Publication Date: 2025-01-17KUBOTA CORP
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Patent Information

Application Number
JP2023106344
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-06-28
Publication Date
2025-01-17
Estimated Expiration
2043-06-28

AI Technical Summary

Technical Problem

The existing combine harvester designs require inefficient manual handling of power transmission belts due to the placement of handles on the opposite side of the tension roller, necessitating separate hand operations for belt removal, which affects work efficiency.

Method used

A combine harvester design with a tension mechanism featuring a swingable tension arm, a tension roller, and a handle positioned close to the transmission belt, allowing for one-handed operation to apply or release tension, facilitating easy removal of the belt.

Benefits of technology

Enhances the workability of removing power transmission belts by enabling one-handed operation, improving efficiency and reducing the need for complex hand coordination during maintenance.

✦ Generated by Eureka AI based on patent content.

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Abstract

To improve workability of transmission belt removing work in a combine in which a waste straw cutting device is provided behind a thresher.SOLUTION: A combine includes: a transmission mechanism 19 for transmitting power of a thresher 5 to a waste straw cutting device 7 by an endless rotation body 23; and a tension mechanism 31. The tension mechanism 31 includes: a swingable tension arm 32; a tension roller 33 rotatably supported at one end of the tension arm 32; a tension spring 34 connected to the other end of the tension arm 32; and a handle 35 provided at the one end of the tension arm 32.SELECTED DRAWING: Figure 3
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Description

[Technical field]

[0001] The present invention relates to the configuration of a straw cutting device in a combine harvester, which finely cuts the straw coming out of the threshing device. [Background technology]

[0002] Patent Document 1 discloses a combine harvester in which a straw discharge / cutting device is provided behind a threshing device. In Patent Document 1, a transmission belt (corresponding to an endless rotating body) is provided across the left side of the threshing device and the left side of the straw cutting device, and power is transmitted to the straw cutting device via the transmission belt. A swingable tension arm, a tension roller supported on the upper part of the tension arm, and a tension spring connected to the lower part of the tension arm are provided for the transmission belt.

[0003] In a combine harvester in which the straw cutting device is installed behind the threshing device, as disclosed in Patent Document 2, by removing the transmission belt, the straw cutting device can be moved rearward away from the threshing device and operated using the right side of the straw cutting device opposite the transmission belt as a fulcrum. This enables workers to perform maintenance work on the inside of the threshing device and maintenance work on the straw removal and cutting device.

[0004] In Patent Document 1, the lower part of the tension arm extends downward, and the extending part of the tension arm serves as a handle. As a result, when an operator removes the transmission belt, the operator extends one hand downward to hold the handle of the tension arm, and operates the handle of the tension arm upward against the tension spring to move the tension roller away from the transmission belt, while removing the transmission belt with the other hand. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2005-40086 A (see FIG. 3) [Patent Document 2] JP 2008-301773 A (see FIG. 3) Summary of the Invention [Problem to be solved by the invention]

[0006] In Patent Document 1, the handle of the tension arm is provided on the opposite side of the tension roller that contacts the transmission belt, and the handle is separated downward from the transmission belt. This means that the worker must hold the handle of the tension arm separated from the transmission belt with one hand while removing the separated transmission belt with the other hand, leaving room for improvement in operability.

[0007] The present invention aims to improve the ease of removing a transmission belt in a combine harvester in which a straw discharge cutting device is provided behind a threshing device. [Means for solving the problem]

[0008] The combine harvester of the present invention comprises a threshing device which threshes harvested stalks, a straw waste cutting device which is provided behind the threshing device and which cuts straw waste, a transmission mechanism which is provided across one side of the threshing device in the left-right direction of the machine body and one side of the straw waste cutting device in the left-right direction of the machine body and transmits the power of the threshing device to the straw waste cutting device by an endless rotating body, and a tensioning mechanism which is switchable between a tensioning state in which tension is applied to the endless rotating body and a tensioning release state in which tension is not applied to the endless rotating body, and the tensioning mechanism is arranged along the left-right direction of the machine body. a tension arm that can swing about a swing axis extending from the endless rotating body, a tension roller that is rotatably supported on one end of the tension arm and can come into contact with the endless rotating body, a tension spring that is connected to the other end of the tension arm and biases the tension arm to swing about the swing axis toward the side where the tension roller comes into contact with the endless rotating body, and a handle that is provided on the one end of the tension arm and is used to swing the tension arm about the swing axis toward the side where the tension roller moves away from the endless rotating body.

[0009] According to the present invention, a tension mechanism is provided for an endless rotating body that transmits power to a straw cutting device, and the tension mechanism has a swingable tension arm, a tension roller supported on one end of the tension arm, and a tension spring connected to the other end of the tension arm. A handle is provided on one end of the tension arm on the same side as the tension roller that contacts the endless rotating body, and the handle is provided close to the endless rotating body.

[0010] This allows the operator to easily hold the handle of the tension arm with one hand without having to stretch the other hand out too far. Even if an operator operates the handle of the tension arm with one hand in a direction that moves the tension roller away from the endless rotating body, the handle of the tension arm does not move very far away from the endless rotating body, so that the operator can easily remove the transmission belt with one hand while holding the handle of the tension arm with the other hand.

[0011] As described above, the worker can easily hold the handle of the tension arm with one hand, and can easily remove the transmission belt with one hand while holding the handle of the tension arm with the other hand, thereby improving the workability of removing the transmission belt.

[0012] In the present invention, it is preferable that the handle is located above the pivot axis when the tension mechanism is in the tensioned state.

[0013] According to the present invention, when tension is applied, the handle of the tension arm is positioned closer to the upper body of the operator and closer to the operator's hands, which is advantageous in terms of improving the operability of removing the transmission belt.

[0014] In the present invention, it is preferable that the handle is positioned rearward of the boundary between the threshing device and the straw removing and cutting device in the fore-and-aft direction of the machine body.

[0015] According to the present invention, when an operator stands next to the straw cutting device to remove the transmission belt, the handle of the tension arm is positioned close to the operator, which is advantageous in terms of improving the workability of removing the transmission belt.

[0016] In the present invention, it is preferable that the straw removal and cutting device is provided with a side cover covering the one side of the straw removal and cutting device from the outside in the left-right direction of the body, and the handle is arranged between the one side of the straw removal and cutting device and the side cover.

[0017] According to the present invention, since the handle of the tension arm is covered by the side cover during the mowing operation, the handle of the tension arm does not affect the mowing operation. When the operator wants to remove the transmission belt, he or she only needs to open or remove the side cover.

[0018] In the present invention, it is preferable that the handle extends outward in the left-right direction of the machine body from the tension arm.

[0019] According to the present invention, the handle of the tension arm can be easily held by an operator, which is advantageous in terms of improving the workability of removing the power transmission belt.

[0020] In the present invention, it is preferable that the handle has a first portion connected to one end of the tension arm and extending along the tension arm on the side opposite the swing axis, and a second portion connected to a tip of the first portion and extending outward from the tip of the first portion in the left-right direction of the aircraft.

[0021] According to the present invention, since the handle of the tension arm has a first part and a second part, a configuration in which the handle of the tension arm extends outward from the tension arm in the left-right direction of the aircraft can be easily obtained, which is advantageous in terms of simplifying the structure. [Brief description of the drawings]

[0022] [Figure 1] FIG. [Diagram 2] This is a plan view of the area around the straw removal and cutting device. [Diagram 3] FIG. [Figure 4] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Figures 1 to 4 show a head-feeding combine harvester, and in Figures 1 to 4, F indicates the forward direction, B indicates the rearward direction, U indicates the upward direction, D indicates the downward direction, R indicates the rightward direction, and L indicates the leftward direction.

[0024] (Overall configuration of the combine) As shown in Fig. 1, right and left crawler-type traveling devices 2 are attached to a machine body 1, and the machine body 1 is supported by the traveling devices 2. A reaping unit 3 and a driving unit 4 are provided at the front of the machine body 1, a threshing device 5 and a grain tank 6 are provided at the rear of the machine body 1, and a straw discharge / cutting device 7 is attached to the rear of the threshing device 5.

[0025] As the machine body 1 advances, the culms in the field are cut by the cutting unit 3, and the cut culms are conveyed rearward while being changed into a sideways position. The bases of the culms are then handed over to the feed chain 8 of the threshing device 5 and conveyed rearward. While the bases of the culms are conveyed rearward by the feed chain 8, the tips of the culms are threshed by the threshing device 5, and the grains are collected and stored in the grain tank 6.

[0026] As shown in Figures 1 and 2, the stalks after threshing are transported from the threshing device 5 to the straw cutting device 7 in a horizontally lying position by the straw transport device 9, where they are cut into small pieces and released into the field. Alternatively, the stalks after threshing pass above the straw cutting device 7 in a horizontally lying position and released into the field.

[0027] A grain discharge device 10 extends upward from the rear lower part of the grain tank 6. When the grain tank 6 becomes full, the grains stored in the grain tank 6 are discharged and transferred to another truck (not shown) or the like by the grain discharge device 10.

[0028] (Straw removal and cutting device configuration) As shown in Figures 2 and 3, the straw discharge cutting device 7 has a cutting rotor 12 and a supply rotor 13 rotatably provided inside a box-shaped case 11.

[0029] The case 11 has a right side section 14, a left side section 15 (corresponding to one side section in the left-right direction of the straw removal and cutting device 7), a rear section 16, and a top plate section 17, and the front and bottom sections of the case 11 are open. The rear section of the top plate section 17 is attached to the upper part of the rear section 16 so as to be swingable up and down around an axis P1 along the left-right direction of the machine, and the top plate section 17 can be operated to a closed position (see FIG. 3) and an open position swung upward from the closed position.

[0030] The cutting rotor 12 has multiple disk-shaped cutting blades 12a attached to a shaft 12b. The shaft 12b of the cutting rotor 12 is attached across a right side 14 and a left side 15 of the case 11 so as to be rotatable around an axis P2 along the left-right direction of the machine body, and the cutting rotor 12 is driven to rotate in the counterclockwise direction in FIG.

[0031] The supply rotor 13 has a number of disk-shaped supply bodies 13a attached to a shaft portion 13b. The shaft portion 13b of the supply rotor 13 is attached across the right side portion 14 and the left side portion 15 of the case 11 so as to be rotatable around an axis P3 along the left-right direction of the machine body, and the supply rotor 13 is rotated clockwise in FIG. 3 at a slower speed than the cutting rotor 12.

[0032] When the top plate 17 of the case 11 of the straw waste cutting device 7 is operated to the open position, the straw waste transported by the straw waste transport device 9 falls from the end of the straw waste transport device 9 and is supplied to the inside of the straw waste cutting device 7. While being sent downward by the supply rotor 13, the straw waste is cut into small pieces by the cutting rotor 12 and discharged into the field.

[0033] In the straw waste cutting device 7, when the top plate 17 of the case 11 is operated to the closed position, the straw waste transported by the straw waste conveying device 9 falls from the end of the straw waste conveying device 9 onto the top plate 17 of the case 11, and slides rearward and downward along the top plate 17 of the case 11 to be released into the field.

[0034] (Working and non-working positions of the straw removal and cutting device) As shown in Fig. 2, a frame 18 supporting the lower part of the grain discharge device 10 is provided along the vertical direction of the machine body, and the right side part 14 of the case 11 is attached to the frame 18 so as to be swingable about an axis P4 along the vertical direction of the machine body. The state shown in Figs. 2 and 3 is a state in which the straw discharge cutter 7 is operated to a working position connected to the rear side part of the threshing device 5.

[0035] As described below, the straw discharge cutting device 7 is swung rearward around the axis P4 and moved rearward away from the rear side of the threshing device 5 to a non-working position, allowing maintenance work to be performed on the inside of the threshing device 5 and on the straw discharge cutting device 7.

[0036] (Outline of the transmission mechanism that transmits power to the straw removal and cutting device) As shown in Figures 2, 3, and 4, the transmission mechanism 19 is provided across the left side 5a of the threshing device 5 (corresponding to one side of the threshing device 5 in the left-right direction of the body) and the left side 15 of the straw removal and cutting device 7 (case 11).

[0037] The transmission mechanism 19 includes transmission pulleys 21, 22, a transmission belt 23 (corresponding to an endless rotating body), a cylindrical shaft 25, transmission sprockets 26, 27, a transmission chain 28, transmission gears 29, 30, and the like.

[0038] A side cover 36 is attached across the left side 5a of the threshing device 5 and the left side 15 of the straw cutting device 7 (case 11). The side cover 36 covers the transmission mechanism 19, which is provided between the left side 15 of the straw cutting device 7 (case 11) and the side cover 36 in plan view.

[0039] (Details of the transmission mechanism that transmits power to the straw removal and cutting device) 2, 3 and 4, a drive mechanism 20 for driving the feed chain 8 is provided at the rear of the left side part 5a of the threshing device 5. A transmission pulley 21 that is rotationally driven by the power that drives the feed chain 8 is provided in the drive mechanism 20, and the transmission pulley 21 is rotationally driven in the counterclockwise direction in FIG.

[0040] In the straw-cleaning device 7, a transmission pulley 22 having approximately the same diameter as the transmission pulley 21 is connected to the shaft portion 12b of the cutting rotor 12, and a transmission belt 23 is attached between the transmission pulley 21 and the transmission pulley 22.

[0041] A fulcrum shaft 24 is connected to a portion below the shaft portion 13b of the supply rotor 13 on the left side portion 15 of the case 11, and a cylindrical shaft 25 is rotatably attached to the fulcrum shaft 24. A transmission sprocket 26 is connected to the shaft portion 12b of the cutting rotor 12, and a transmission sprocket 27 having a larger diameter than the transmission sprocket 26 is connected to the cylindrical shaft 25. A transmission chain 28 is attached between the transmission sprockets 26 and 27.

[0042] A transmission gear 29 is connected to the cylindrical shaft 25, and a transmission gear 30 having a larger diameter than the transmission gear 29 is connected to the shaft portion 13b of the supply rotor 13, and the transmission gear 29 and the transmission gear 30 are in mesh with each other.

[0043] The power of the transmission pulley 21 is transmitted to the shaft portion 12b of the cutting rotor 12 via the transmission belt 23 and the transmission pulley 22, and the cutting rotor 12 is rotated counterclockwise in Fig. 3. The power transmitted to the shaft portion 12b of the cutting rotor 12 is reduced in speed and transmitted to the cylindrical shaft 25 via the transmission sprockets 26, 27 and the transmission chain 28.

[0044] The power transmitted to the cylindrical shaft 25 is decelerated and reversed via the transmission gears 29 and 30 and transmitted to the shaft portion 13b of the supply rotor 13, so that the supply rotor 13 is rotated clockwise in FIG. 3 at a slower speed than the cutting rotor 12.

[0045] (Correspondence to claims regarding a transmission mechanism that transmits power to a straw removal and cutting device) The above-mentioned configuration provides a threshing device 5 for threshing the harvested stalks. A straw waste cutting device 7 is provided behind the threshing device 5 for cutting the straw. A transmission mechanism 19 is provided across one side (left side 5a) of the threshing device 5 in the left-right direction of the body and one side (left side 15) of the straw waste cutting device 7 in the left-right direction of the body, and transmits the power of the threshing device 5 to the straw waste cutting device 7 via an endless rotating body (transmission belt 23).

[0046] (Configuration of tension mechanism for transmission belt) 2, 3 and 4, a tension mechanism 31 is provided for the transmission belt 23 of the transmission mechanism 19. The tension mechanism 31 includes a tension arm 32, a tension roller 33, a tension spring 34, a handle 35, and the like.

[0047] The tension mechanism 31 is provided below the lower part of the transmission belt 23 of the transmission mechanism 19. The tension mechanism 31 is covered by a side cover 36, and is provided between the left side part 15 of the straw cutting device 7 (case 11) and the side cover 36 in a plan view.

[0048] A tension arm 32 is attached to the fulcrum shaft 24 so as to be swingable about an axis P5 (corresponding to a swing axis) along the left-right direction of the vehicle body. The tension arm 32 has an upper portion 32a extending obliquely upward and forward from the axis P5, and a lower portion 32b extending obliquely downward and rearward from the axis P5.

[0049] A tension roller 33 is rotatably attached to an end portion (corresponding to one end portion of the tension arm 32) of the upper portion 32a of the tension arm 32. A tension spring 34 is attached across an end portion (corresponding to the other end portion of the tension arm 32) of the lower portion 32b of the tension arm 32 and the lower portion of the front portion of the left side portion 15 of the case 11. The tension spring 34 biases the tension arm 32 in the clockwise direction in FIG.

[0050] (Configuration of handle in tension mechanism) 3 and 4, the handle 35 is connected to the upper portion 32a of the tension arm 32. The handle 35 has a first portion 35a and a second portion 35b and is formed in an angle shape.

[0051] The first part 35a of the handle 35 is connected to the end of the upper part 32a of the tension arm 32, and extends from the upper part 32a of the tension arm 32 diagonally downward and forward, on the opposite side to the axis P5, along the upper part 32a of the tension arm 32.

[0052] The second part 35b of the handle 35 extends from the tip of the first part 35a of the handle 35, passing below the lower part of the transmission belt 23 of the transmission mechanism 19, and toward the left, which is the outer side in the left-right direction of the aircraft body.

[0053] (Tension mechanism tension state) 3 is a tension applying state of the tension mechanism 31 in which the tension arm 32 is biased in the clockwise direction in FIG. 3 by the tension spring 34, and the tension roller 33 is pressed upward from below against the lower portion of the transmission belt 23. In the tension applying state of the tension mechanism 31, tension is generated in the transmission belt 23, and the power of the transmission pulley 21 is transmitted to the transmission pulley 22 via the transmission belt 23.

[0054] When the tension mechanism 31 is in a tensioned state, the upper portion 32a of the tension arm 32 extends obliquely upward and forward from the axis P5, and the tension roller 33 and the handle 35 are positioned above the axis P5 in a side view.

[0055] When viewed from the side, the tension roller 33 and the handle 35 are located rearward of the rear end of the left side 5a of the threshing device 5 (corresponding to the boundary between the threshing device 5 and the straw cutting device 7 in the fore-and-aft direction of the machine body), and are located rearward of the front end of the left side 15 of the straw cutting device 7 (case 11) (corresponding to the boundary between the threshing device 5 and the straw cutting device 7 in the fore-and-aft direction of the machine body).

[0056] Since the first portion 35a of the handle 35 extends obliquely downward and forward from the upper portion 32a of the tension arm 32, the handle 35 (second portion 35b) does not come into contact with the transmission belt 23.

[0057] (Tension mechanism in released state) By removing the side cover 36 shown in Figures 1 to 4 and removing the transmission belt 23 from the transmission pulley 22, the straw removal cutting device 7 can be swung rearward around the axis P4 from the working position shown in Figure 2, and can be operated to a non-working position separated rearward from the rear side of the threshing device 5.

[0058] When the operator operates the straw cutting device 7 to the non-operating position, he or she removes the side cover 36 from the threshing device 5 and the straw cutting device 7. 3 and 4, while holding the second portion 35b of the handle 35 with one hand, the operator operates the handle 35 downward by applying his / her body weight from above, and operates the tension arm 32 to swing counterclockwise in Fig. 3, and moves the tension roller 33 downward and away from the lower portion of the transmission belt 23 (see the dashed line in Fig. 3). This causes the tension mechanism 31 to enter a tension-released state.

[0059] By operating the tension mechanism 31 to the tension release state, the tension of the transmission belt 23 disappears, and the worker removes the transmission belt 23 from the transmission pulley 22 with the other hand. This allows the worker to operate the straw cutting device 7 to the non-operating position.

[0060] When the tension mechanism 31 is in a tension-released state (see the dashed line in FIG. 3), the upper portion 32a of the tension arm 32 extends forward from the axis P5 in a substantially horizontal position. The tension roller 33 is located at approximately the same height as the axis P5 in side view, and the handle 35 (second part 35b) is located at a position slightly lower than the axis P5 in side view. The tension roller 33 and the handle 35 are located behind the rear end of the left side part 5a of the threshing device 5 and the front end of the left side part 15 of the straw removing and cutting device 7 (case 11) in side view.

[0061] (Correspondence to claims regarding tension mechanism) With the above configuration, a tension mechanism 31 is provided that can be switched between a tension applied state in which tension is applied to the endless rotating body (transmission belt 23) and a tension released state in which tension is not applied to the endless rotating body (transmission belt 23).

[0062] The tension mechanism 31 includes a tension arm 32 that can swing around a swing axis (axis P5) that extends in the left-right direction of the body, a tension roller 33 that is rotatably supported on one end of the tension arm 32 and can come into contact with the endless rotating body (transmission belt 23), a tension spring 34 that is connected to the other end of the tension arm 32 and biases the tension arm 32 to swing around the swing axis (axis P5) in a direction that brings the tension roller 33 into contact with the endless rotating body (transmission belt 23), and a handle 35 that is provided at one end of the tension arm 32 and is used to swing the tension arm 32 around the swing axis (axis P5) in a direction that moves the tension roller 33 away from the endless rotating body (transmission belt 23).

[0063] When the tension mechanism 31 is in a tensioned state, the handle 35 is located above the pivot axis (axis P5). The handle 35 is located rearward of the boundary between the threshing device 5 and the straw removing and cutting device 7 in the fore-and-aft direction of the machine body.

[0064] A side cover 36 is provided to cover one side (left side 15) of the straw removal and cutting device 7 from the outside in the left-right direction of the body. The handle 35 is disposed between one side (left side 15) of the straw removal and cutting device 7 and the side cover 36. The handle 35 extends from the tension arm 32 outward in the left-right direction of the machine body.

[0065] The handle 35 has a first portion 35a connected to one end of the tension arm 32 and extending along the tension arm 32 on the side opposite the swing axis (axis P5), and a second portion 35b connected to the tip of the first portion 35a and extending outward from the tip of the first portion 35a in the left-right direction of the aircraft.

[0066] (First Alternative Embodiment of the Invention) When the threshing device 5 is provided on the right side of the rear of the body 1 and the feed chain 8 is provided on the right side of the threshing device 5, the straw discharge / cutting device 7 is configured to be operated to a non-working position away from the rear of the threshing device 5 around an axis P4 set on the left side 15 of the straw discharge / cutting device 7 (case 11).

[0067] According to the above-mentioned configuration, the transmission mechanism 19 is provided across the right side of the threshing device 5 and the right side 14 of the straw cutting device 7 (case 11), and the tension mechanism 31 is provided on the right side 14 of the straw cutting device 7 (case 11). The right side of the threshing device 5 is one side of the threshing device 5 in the left-right direction of the machine body, and the right side 14 of the straw cutting device 7 (case 11) is one side of the straw cutting device 7 in the left-right direction of the machine body.

[0068] (Second Alternative Embodiment of the Invention) The fulcrum shaft 24 (axis center P5) may be provided on the left side portion 15 of the straw removal and cutting device 7, further forward than the position shown in FIG.

[0069] According to the above-mentioned configuration, when the tension mechanism 31 is in a tensioned state, the upper portion 32a of the tension arm 32 extends obliquely upward and rearward from the axis P5, and when the tension mechanism 31 is in a tension-released state, the upper portion 32a of the tension arm 32 extends rearward in a substantially horizontal position from the axis P5. The tension arm 32 may be biased by the tension spring 34 in the counterclockwise direction in FIG.

[0070] (Third Alternative Embodiment of the Invention) In the handle 35, the first portion 35a and the second portion 35b may be configured as separate members, and the first portion 35a and the second portion 35b may be configured to be connected by welding, bolts, or the like.

[0071] (Fourth Alternative Embodiment of the Invention) In the transmission mechanism 19, instead of the transmission belt 23, a transmission chain (not shown) may be used as an endless rotating body. [Industrial Applicability]

[0072] The present invention can be applied to a head-feeding combine harvester. [Explanation of symbols]

[0073] 5. Threshing Equipment 5a Left side (one side) 7 Straw cutting device 15 Left side (one side) 19 Transmission Mechanism 23 Endless rotating body 31 Tension mechanism 32 Tension Arm 32a first part 32b Second part 33 Tension roller 34 Tension spring 35 Handle 36 Side cover P5 Swing axis center

Claims

1. a threshing device for threshing the harvested stalks; A straw cutting device provided behind the threshing device for cutting straw; A transmission mechanism is provided across one side of the threshing device in the left-right direction of the machine body and one side of the straw cutting device in the left-right direction of the machine body, and transmits the power of the threshing device to the straw cutting device by an endless rotating body; a tension mechanism that is switchable between a tension applying state in which tension is applied to the endless rotating body and a tension release state in which tension is not applied to the endless rotating body, The tension mechanism includes a tension arm that can swing around a swing axis extending in the left-right direction of the machine body, a tension roller that is rotatably supported on one end of the tension arm and can contact the endless rotating body, a tension spring that is connected to the other end of the tension arm and biases the tension arm to swing around the swing axis toward the side where the tension roller contacts the endless rotating body, and a handle that is provided on the one end of the tension arm and is used to swing the tension arm around the swing axis toward the side where the tension roller moves away from the endless rotating body.

2. The combine harvester according to claim 1 , wherein the handle is positioned above the pivot axis when the tensioning mechanism is in the tensioned state.

3. The combine harvester according to claim 1 or 2, wherein the handle is arranged rearward of a boundary between the threshing device and the straw removing and cutting device in the fore-and-aft direction of the machine body.

4. A side cover is provided to cover the one side of the straw cutting device from the outside in the left-right direction of the machine body, 3. The combine harvester according to claim 1, wherein the handle is disposed between the one side of the straw removal and cutting device and the side cover.

5. The combine harvester according to claim 1 or 2, wherein the handle extends outward in a left-right direction of the machine body from the tension arm.

6. The combine harvester of claim 5, wherein the handle has a first portion connected to the one end of the tension arm and extending along the tension arm on the opposite side to the swing axis, and a second portion connected to a tip of the first portion and extending outward from the tip of the first portion in the left-right direction of the body.

Citation Information

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