Harvester

Abstract

To construct a harvester so as to be able to rake in crops near a lateral wall of a reaping part and rake in backward by a reel with less damage.SOLUTION: A harvester includes: left and right support frames whose upper side positions to a lateral wall 14 are disposed along a front-back direction; a raking reel 11 supported by the support frames rotatably around a shaft core P1 along a left-right direction and rotatably driven so as to rake in crops on a field backward; and a cover 40 for covering the support frames from the outside. A bottom portion 43 of the cover 40 is recessed upward to an upper end portion 14a of the lateral wall 14 so that a gap A1 reaching from a front end of the cover 40 to an elevating cylinder 20 is generated between the bottom portion 43 of the cover 40 and the upper end portion 14a of the lateral wall 14 when the raking reel 11 is operated to a lower most descending position.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to the configuration of a cutting unit in a harvester.

Background Art

[0002] As disclosed in Patent Document 1, in a conventional combine, which is an example of a harvester, a cutting unit having a cutting frame provided with left and right side walls, a reel, a cutting device, and a lateral conveyor is provided. Thereby, the vicinity of the base of the crop in the field is cut by the cutting device, the crop is scraped backward by the reel, conveyed along the lateral direction by the lateral conveyor, and harvested by the cutting unit. The crop harvested by the cutting unit is conveyed backward by the conveying device and supplied to the threshing device for threshing.

[0003] In Patent Document 1, in the cutting unit, left and right support frames are arranged at upper positions with respect to the side walls along the front-rear direction, and the reel is rotatably supported at the front part of the support frame around an axis along the left-right direction. The height of the reel is changed by vertically operating the support frame around the fulcrum at the rear part of the support frame. In this case, a cover for covering the support frame from the outside may be provided.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When the side wall of the cutting unit passes through a portion in the field where, for example, tall crops exist, if the crops fall outward of the cutting unit, the crops may enter between the bottom portion of the cover of the reel (support frame) and the upper end portion of the side wall.

[0006] In this case, if the raking reel is set at a low position, the space between the bottom part of the cover and the upper end part of the side wall becomes narrow, so the crop may be pinched between the cover and the side wall, and the pinched crop may be raked backward by the raking reel, which may lead to crop damage.

[0007] An object of the present invention is to configure a harvester so that crops near the side walls of the cutting unit can be raked backward with less damage by a raking reel.

Means for Solving the Problems

[0008] The present invention is a harvester including a cutting unit for harvesting crops in a field and a conveying device for conveying the crops harvested by the cutting unit from the cutting unit, wherein the cutting unit includes a cutting frame having left and right side walls and connected to the conveying device, left and right support frames provided at upper positions with respect to the side walls along the front-rear direction, a raking reel rotatably supported by the support frames around an axis along the left-right direction and driven to rotate to rake crops in a field backward, a cutting device for cutting the roots of the crops in the field, a lateral feeding conveyor for conveying the harvested crops toward the conveying device, a lifting cylinder capable of changing the height of the raking reel by operating the support frame up and down around a fulcrum at the rear part of the support frame, and a cover for covering the support frame from the outside, and the bottom part of the cover is recessed upward with respect to the upper end part of the side wall so that a gap from the front end part of the cover to the lifting cylinder is formed between the bottom part of the cover and the upper end part of the side wall when the raking reel is operated to the lowest position Moreover, the bottom portion of the cover is provided from the front end portion to the front-back intermediate portion of the bottom portion of the cover, and when the raking reel is operated to the lowest position, in a side view, it has a front half portion that assumes a posture along the upper end portion of the side wall, and is provided from the rear portion of the front half portion to the rear end portion of the bottom portion of the cover. When the raking reel is operated to the lowest position, in a side view, it has a rear half portion that assumes a posture extending from the rear portion of the front half portion toward the upper end portion of the side wall.

[0009] According to the present invention, even if the side wall of the cutting unit passes through a portion in the field where, for example, tall crops are present and the crops fall outward from the cutting unit and enter between the bottom portion of the cover of the raking reel (support frame) and the upper end portion of the side wall, there is a gap between them, so the crops are less likely to be pinched between the cover and the side wall. As a result, even if the crops that have entered between the bottom portion of the cover and the upper end portion of the side wall are raked backward by the raking reel, the crops come out from between the bottom portion of the cover and the upper end portion of the side wall with little damage and are harvested by the cutting unit, so the harvesting efficiency of harvesting the crops with little damage in the harvester can be improved. According to the present invention, when the raking reel is operated to the lowest position, the front half portion of the bottom portion of the cover assumes a posture along the upper end portion of the side wall in a side view. Thereby, the crop that has entered between the bottom portion of the cover and the upper end portion of the side wall is raked backward by the raking reel and moves backward with less damage. According to the present invention, when the raking reel is operated to the lowest position, the rear half portion of the bottom portion of the cover assumes a posture extending from the rear portion of the front half portion of the bottom portion of the cover toward the upper end portion of the side wall in a side view. Thereby, the crop that has entered between the bottom portion of the cover and the upper end portion of the side wall is raked backward by the raking reel and exits from between the bottom portion of the cover and the upper end portion of the side wall toward the left-right center portion of the cutting unit with less damage. Therefore, it is advantageous in terms of harvesting the crop with less damage.

[0010] In the present invention, it is preferable that left and right crop dividers extending forward from the side wall are provided.

[0011] According to the present invention, the crops in the field reach the side wall while being divided by the crop dividers into the crops within the left and right width of the cutting unit and the crops outside the left and right width of the cutting unit. As a result, the state in which the crops outside the left and right width of the cutting unit enter between the bottom portion of the cover and the upper end portion of the side wall can be reduced, which is advantageous in terms of harvesting the crops with little damage.

[0012]

[0013]

[0014]

[0015] In the present invention, it is preferable that when the raking reel is operated to the lowest position, the front portion of the cover is in a posture in which, in a side view, the lower portion of the front portion of the cover is located behind the upper portion of the front portion of the cover.

[0016] According to the present invention, when, for example, in a field, the side wall of the cutting part passes through a part where tall crops are present, and the crops fall outward from the cutting part and enter between the bottom part of the cover and the upper end part of the side wall, the crops enter between the bottom part of the cover and the upper end part of the side wall while being guided by the front part of the cover. Therefore, it is advantageous in terms of cutting and harvesting the crops with less damage.

[0017] In the present invention, it is preferable that a transmission belt for transmitting rotational power to the raking reel is provided along the support frame so as to be covered by the cover, and a guide rotating body is provided to guide the lower part of the winding path of the transmission belt to protrude upward.

[0018] According to the present invention, the transmission belt for transmitting rotational power to the raking reel is provided along the support frame, and the transmission belt is covered by the cover. Since the guide rotating body guides the lower part of the winding path of the transmission belt to protrude upward, it is less affected by the lower part of the winding path of the transmission belt, and it is easy to make the bottom part of the cover recess upward.

[0019] In the present invention, it is preferable that a position changing part is provided for changing the mounting position of the raking reel on the support frame back and forth along the support frame, and a tension adjusting part for adjusting the tension of the transmission belt accompanying the change of the mounting position of the raking reel is provided with respect to the upper part of the winding path of the transmission belt.

[0020] According to the present invention, the position changing part is configured such that the mounting position of the raking reel on the support frame can be changed back and forth along the support frame. According to the present invention, since the tension adjusting part for adjusting the tension of the transmission belt accompanying the change of the mounting position of the raking reel is provided with respect to the upper part of the winding path of the transmission belt, the tension adjusting part and the guide rotating body provided with respect to the lower part of the winding path of the transmission belt are arranged without interfering with each other and without difficulty.

[0021] In the present invention, it is preferable that the upper end portion of the cover is formed so as to protrude upward in a side view.

[0022] According to the present invention, since the upper end portion of the cover is formed so as to protrude upward in a side view, the tension adjusting portion is arranged without interfering with the upper end portion of the cover and without difficulty.

[0023] In the present invention, it is preferable that the guide rotating body is located in front of the tension adjusting portion.

[0024] According to the present invention, since the guide rotating body is located in front of the tension adjusting portion, the tension adjusting portion is provided with respect to the upper portion of the winding path of the transmission belt, and the guide rotating body is provided with respect to the lower portion of the winding path of the transmission belt. In combination, the tension adjusting portion and the guide rotating body are arranged without interfering with each other and without difficulty.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0026] Figures 1 to 10 show a conventional combine, which is an example of a harvester. F indicates the forward direction, B indicates the rear direction, U indicates the upward direction, D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

[0027] (Overall configuration of the combine) As shown in FIGS. 1 and 2, the body 1 is supported by a crawler-type traveling device 2, and a cutting unit 3 and an operation unit 4 are provided at the front of the body 1. A threshing device 5 is provided on the left side of the body 1, a grain tank 6, which is a storage unit, is provided on the right side of the body 1, and a crop discharge device 7 is connected to the lower part of the rear of the grain tank 6.

[0028] A conveying device 8 is supported at the front of the threshing device 5 so as to be swingable up and down around an axis along the left-right direction, and extends forward from the threshing device 5. The cutting unit 3 is connected to the front of the conveying device 8, and the cutting unit 3 for harvesting the crops in the field is provided at the front of the body 1. A lifting cylinder (not shown) is connected across the body 1 and the conveying device 8, and the cutting unit 3 and the conveying device 8 are lifted and lowered by the lifting cylinder.

[0029] With the above configuration, as the body 1 moves forward, the crops in the field are introduced into the cutting unit 3 for harvesting, and the crops are conveyed from the cutting unit 3 through the conveying device 8 and supplied to the threshing device 5. The crops are threshed by the threshing device 5, and the crops threshed and collected by the threshing device 5 are stored in the grain tank 6. When the grain tank 6 is full, the crops in the grain tank 6 are discharged by the discharge device 7.

[0030] (Configuration of the cutting unit) As shown in FIGS. 1 and 2, the cutting unit 3 is provided with a cutting frame 9, a weeding tool 10, a raking reel 11, a cutting device 12, a lateral feed screw 13 (corresponding to a lateral feed conveyor), and the like. The cutting frame 9 serves as the framework of the cutting unit 3, is provided across the entire width of the cutting unit 3 in the left-right direction, and the rear part of the cutting frame 9 is connected to the front part of the conveying device 8.

[0031] The left and right side walls 14 are connected to the right and left end portions of the cutting frame 9. The left and right weed separating tools 10 are connected to the front end portions of the left and right side walls 14 and extend forward from the side walls 14. The upper end portion 10a of the weed separating tool 10 and the upper end portion 14a of the side wall 14 are connected so as to be continuous with each other and are inclined in a rearwardly rising (forwardly descending) shape that becomes higher towards the rear side (see FIGS. 3 and 4).

[0032] The raking reel 11 is provided so as to be positioned above the cutting frame 9, and the clipper-type cutting device 12 is provided at the front portion of the cutting frame 9. The lateral feed screw 13 is rotatably supported across the left and right side walls 14 around an axis extending in the left-right direction.

[0033] With the above configuration, as the machine body 1 moves forward, the crops in the field are weeded by the left and right weed separating tools 10, raked towards the cutting frame 9 rearward by the raking reel 11, and the roots of the crops are cut by the cutting device 12. When the crops are introduced into the cutting frame 9, the crops are conveyed towards the left and right central portion of the cutting frame 9 by the lateral feed screw 13, sent from the lateral feed screw 13 to the conveying device 8, and supplied from the conveying device 8 to the threshing device 5.

[0034] (Configuration of the raking reel) As shown in FIGS. 3, 4, and 5, the raking reel 11 is provided with left, right, and central rotating frames 15, a plurality of frames 16 attached across the left and right rotating frames 15, a large number of tines 17 attached downward to the frames 16, and the like.

[0035] The fulcrum shaft 18 is rotatably supported along the left-right direction at the upper portion of the rear part of the cutting frame 9, and the left and right support frames 19 are connected to the right and left end portions of the fulcrum shaft 18. The support frame 19 is arranged at an upper position with respect to the weed separating tool 10 and the side wall 14 along the front-rear direction.

[0036] The left and right support brackets 23 (corresponding to the position changing part) are attached to the front part of the support frame 19 so as to be position changeable back and forth along the support frame 19 and fixable in position by bolts. The raking reel 11 is attached to the left and right support brackets 23 so as to be rotatable around the axis P1 along the left - right direction.

[0037] Thereby, the raking reel 11 is attached to the front part of the left and right support frames 19 so as to be rotatable around the axis P1 along the left - right direction. When the attachment position of the support bracket 23 on the support frame 19 is changed back and forth along the support frame 19, the attachment position of the raking reel 11 on the support frame 19 is changed back and forth along the support frame 19.

[0038] The left and right elevating cylinders 20 are attached across the side wall 14 and the support frame 19. By operating the support frame 19 up and down around the axis P2 of the fulcrum shaft 18 (corresponding to the fulcrum at the rear part of the support frame 19) by the elevating cylinder 20, the height of the raking reel 11 is changed.

[0039] (Configuration of the transmission system of the cutting part) As shown in FIGS. 2 to 5, the transmission shaft 21 is supported along the left - right direction at the lower part of the rear part of the cutting frame 9, and the power from the machine body 1 is transmitted to the transmission shaft 21 via the transmission chain 22 arranged along the outer surface part of the conveying device 8. A sprocket 21a and a cam mechanism 21b are attached to the right end part of the transmission shaft 21.

[0040] A sprocket 13a connected to the cross - feed screw 13 is arranged outside with respect to the right side wall 14, and a transmission chain 24 is attached across the sprocket 21a of the transmission shaft 21 and the sprocket 13a of the cross - feed screw 13. The power of the transmission shaft 21 is transmitted to the cross - feed screw 13 via the transmission chain 24, and the cross - feed screw 13 is rotationally driven in the clockwise direction in FIGS. 3 and 4.

[0041] The drive shaft 25 is supported on the outside along the front - rear direction with respect to the right side wall 14. The rear part of the drive shaft 25 is connected to the cam mechanism 21b of the transmission shaft 21, and an arm 25a connected to the front part of the drive shaft 25 is connected to the right end of the cutting device 12. When the transmission shaft 21 is rotationally driven, the cam mechanism 21b of the transmission shaft 21 rotationally drives the drive shaft 25 forward and backward, and the arm 25a of the drive shaft 25 is reciprocally driven left and right, thereby driving the cutting device 12.

[0042] The sprocket 26 and the pulley 27 are connected to each other and are supported on the right part of the fulcrum shaft 18 so as to be rotatable around the axis P2. A sprocket 13b is connected to the sprocket 13a of the cross - feed screw 13, and a transmission chain 28 is attached across the sprocket 26 and the sprocket 13b of the cross - feed screw 13.

[0043] The power transmitted to the cross - feed screw 13 is transmitted to the sprocket 26 and the pulley 27 via the transmission chain 28. The power is transmitted from the pulley 27 to the winding reel 11 as described in (the configuration of the drive system of the winding reel) below, and the winding reel 11 is rotationally driven in the clockwise direction in FIGS. 3 and 4.

[0044] (Configuration of the drive system of the winding reel) As shown in FIGS. 3, 4, and 5, a pulley 29 connected to the right part of the winding reel 11 is arranged at the position of the axis P1 of the right support frame 19. Between the pulleys 27 and 29 in the right support frame 19, a guide pulley 30 is supported so as to be rotatable around an axis P3 along the left - right direction.

[0045] An adjustment arm 31 (corresponding to the tension adjustment part) is supported so as to be swingable around the axis P3 and extends upward from the right support frame 19. A guide pulley 31a is rotatably supported on the upper part of the adjustment arm 31.

[0046] A bracket 32 is connected to the rear part of the right support frame 19, and a mounting member 33 (corresponding to the tension adjustment part) is attached to the bracket 32, and a spring 34 is attached across the adjustment arm 31 and the mounting member 33. The spring 34 biases the adjustment arm 31 to swing rearward.

[0047] The mounting member 33 is attached to the bracket 32 by nuts, and the mounting position of the mounting member 33 on the bracket 32 can be changed in the front-rear direction by the nuts. Thereby, the posture of the adjustment arm 31 can be changed in the front-rear direction.

[0048] A bracket 35 is connected to the portion between the adjustment arm 31 (guide pulley 30) and the pulley 29 in the right support frame 19, and the bracket 35 extends downward from the right support frame 19. A guide pulley 36 (corresponding to the guide rotating body) is rotatably supported by the bracket 35.

[0049] The transmission belt 37 is attached across the guide pulley 30, the guide pulley 31a of the adjustment arm 31, and the guide pulley 36, between the pulley 27 and the pulley 29, and the transmission belt 37 is provided along the right support frame 19.

[0050] With the above configuration, the power (rotational power) of the pulley 27 is transmitted to the pulley 29 via the transmission belt 37 and then transmitted to the scraping reel 11, and the scraping reel 11 is rotationally driven in the clockwise direction shown in FIGS. 3 and 4.

[0051] The states shown in FIGS. 3 and 4 are the states where the mounting position of the scraping reel 11 (support bracket 23) on the support frame 19 is set to the rear position. As described in the above (configuration of the scraping reel), when the mounting position of the scraping reel 11 (support bracket 23) on the support frame 19 is changed forward, accordingly, the mounting position of the mounting member 33 on the bracket 32 is changed forward, and the posture of the adjustment arm 31 is changed forward, whereby the tension of the transmission belt 37 is adjusted to an appropriate state.

[0052] Thereby, an adjustment arm 31 (corresponding to the tension adjustment part) for adjusting the tension of the transmission belt 37 accompanying the change in the mounting position of the scraping reel 11 is provided with respect to the upper part 37a of the winding path of the transmission belt 37.

[0053] The guide pulley 36 (corresponding to the guide rotating body) is provided with respect to the lower part 37b of the winding path of the transmission belt 37 and is located on the front side of the adjustment arm 31 (corresponding to the tension adjustment part). The lower part 37b of the winding path of the transmission belt 37 is guided so as to protrude upward by the guide pulley 36 (corresponding to the guide rotating body).

[0054] (Configuration of the cover covering the support frame and the transmission belt in the scraping reel) As shown in FIGS. 3, 4, and 5, a cover 40 that covers the right support frame 19 and the transmission belt 37 from the outside is provided. The cover 40 is provided with a right horizontal part 41, an upper end part 42, a bottom part 43, a front part 44, a rear part 45, etc., and the left side of the cover 40 is open.

[0055] Stays 38 and 39 are attached to the right support frame 19. The upper end part 42 of the cover 40 is bolt-connected to the stay 38, and the front part 44 of the cover 40 is bolt-connected to the stay 39, whereby the cover 40 is attached to the right support frame 19.

[0056] The cover 40 covers the upper, lower, front, rear, and right lateral sides of the right support frame 19. The cover 40 covers the upper, lower, front, rear, and right lateral sides of the sprocket 26, transmission belt 37, pulleys 27, 29, guide pulleys 30, 36, adjustment arm 31, and guide pulley 31a.

[0057] As shown in FIGS. 1 and 4, a cover 46 covering the outer portion of the side wall 14 is attached to the side wall 14, and the upper end portion of the cover 46 is located slightly below the upper end portion 14a of the side wall 14 in a side view.

[0058] (Specific shape of the cover) As shown in FIG. 3, in the cover 40, the upper end portion 42 of the cover 40 has a front half portion 42a provided from the front end portion to the front-rear intermediate portion of the upper end portion 42, and a rear half portion 42b provided from the rear portion of the front half portion 42a to the rear end portion of the upper end portion 42.

[0059] The state shown in FIG. 3 is a state where the scraping reel 11 is operated to the lowest position. In the cover 40 in this state, the front half portion 42a of the upper end portion 42 is inclined in a rear-rising (front-dropping) posture in a side view, where the rear portion of the front half portion 42a of the upper end portion 42 is higher than the front portion of the front half portion 42a of the upper end portion 42.

[0060] In the cover 40 in a state where the scraping reel 11 is operated to the lowest position, the rear half portion 42b of the upper end portion 42 is inclined in a rear-dropping (front-rising) posture in a side view, where the rear portion of the rear half portion 42b of the upper end portion 42 is lower than the front portion of the rear half portion 42b of the upper end portion 42. As a result, the upper end portion 42 of the cover 40 is formed to protrude upward in a side view.

[0061] The bottom portion 43 of the cover 40 has a front half portion 43a provided from the front end portion to the front-rear intermediate portion of the bottom portion 43, and a rear half portion 43b provided from the rear portion of the front half portion 43a to the rear end portion of the bottom portion 43.

[0062] In the cover 40 in a state where the raking reel 11 is operated to the lowest position, the front half portion 43a of the bottom portion 43 is in a posture along the upper end portion 10a of the weeding tool 10 and the upper end portion 10a of the side wall 14 in a side view. The rear half portion 43b of the bottom portion 43 is in a posture extending from the rear portion of the front half portion 43a toward the upper end portion 14a of the side wall 14 in a side view.

[0063] Thereby, when the raking reel 11 is operated to the lowest position, a gap A1 from the front end portion (front portion 44) of the cover 40 to the lifting cylinder 20 is formed between the bottom portion 43 of the cover 40 and the upper end portion 10a of the weeding tool 10 and the upper end portion 14a of the side wall 14, and the bottom portion 43 of the cover 40 is recessed upward with respect to the upper end portion 10a of the weeding tool 10 and the upper end portion 14a of the side wall 14.

[0064] The front portion 44 of the cover 40 has an upper portion 44a provided from the upper end portion to the upper and lower middle portion of the front portion 44, and a lower portion 44b provided from the lower portion of the upper portion 44a to the lower end portion of the front portion 44.

[0065] As shown in FIG. 3, in the cover 40 in a state where the raking reel 11 is operated to the lowest position, the lower portion 44b of the front portion 44 is in an inclined posture such that the lower portion of the lower portion 44b of the front portion 44 is located rearward (frontward rising) of the upper portion of the lower portion 44b of the front portion 44 in a side view.

[0066] (State of crops near the cover) As described in the above (Configuration of the cutting unit), when the crops in the field are cut and harvested by the cutting unit 3, it is assumed that the right weeding tool 10 and the right side wall 14 pass through a portion in the field where, for example, tall crops exist, and the crops fall outward to the right of the cutting unit 3 (the right weeding tool 10 and the right side wall 14).

[0067] In this case, while the crop is guided by the upper end portion 10a of the weeding tool 10 and the front portion 44 (lower portion 44b) of the cover 40, it enters the space (gap A1) between the bottom portion 43 (front half portion 43a) of the cover 40, the upper end portion 10a of the weeding tool 10, and the upper end portion 14a of the side wall 14.

[0068] The crop that has entered the space (gap A1) between the bottom portion 43 (front half portion 43a) of the cover 40, the upper end portion 10a of the weeding tool 10, and the upper end portion 14a of the side wall 14 is scraped backward by the scraping reel 11, and thus moves backward through the space (gap A1) between the bottom portion 43 (front half portion 43a) of the cover 40, the upper end portion 10a of the weeding tool 10, and the upper end portion 14a of the side wall 14.

[0069] Next, the crop is scraped backward by the scraping reel 11 and conveyed toward the left and right central portions of the cutting frame 9 by the lateral feed screw 13, and thus exits from the space (gap A1) between the bottom portion 43 (rear half portion 43b) of the cover 40, the upper end portion 10a of the weeding tool 10, and the upper end portion 14a of the side wall 14, and moves toward the left and right central portions of the cutting frame 9.

[0070] (Configuration of the operation unit) As shown in FIGS. 1 and 6, the operation unit 4 is provided with a bonnet 47 that houses the engine 57, a front operation portion 48 provided in front of the bonnet 47, a lateral operation portion 49 provided across the left portion of the bonnet 47 and the left portion of the front operation portion 48, a floor portion 58 provided below these, a roof portion 50 that covers the upper part of these, and the like.

[0071] The driver's seat 51 is provided on the upper part of the bonnet 47. An operation lever 52 for performing the steering operation of the left and right traveling devices 2 and the lifting operation of the cutting unit 3, and a fixed handle 53 are provided on the front operation portion 48. A shift lever 54 for operating a hydrostatic continuously variable transmission for traveling (not shown), a threshing clutch lever 55, and a cutting clutch lever 56 are provided on the lateral operation portion 49.

[0072] As shown in FIGS. 6 and 7, a reinforcing frame 59 is connected to a body frame 60 constituting the body 1 and extends upward. The upper part of the reinforcing frame 59 is connected to the upper part of the left rear part of the bonnet 47 and the upper part of the rear part of the lateral control part 49, and the upper part of the reinforcing frame 59 is connected to the front part of the threshing device 5. Vibration of the bonnet 47 and the driver's seat 51 is suppressed by the reinforcing frame 59.

[0073] (Configuration of threshing clutch lever and mowing clutch lever) As shown in FIGS. 7 and 8, a threshing clutch 61 for transmitting and interrupting the power of the engine 57 to the threshing device 5 is provided. A mowing clutch (not shown) is provided on the downstream side of the threshing clutch 61, and the power branched from between the threshing clutch 61 and the threshing device 5 is transmitted and interrupted to the mowing unit 3 and the conveying device 8 via the mowing clutch.

[0074] Bearing parts 62 and 63 are provided on the upper surface part 49a and the left lateral surface part 49b of the lateral control part 49. An operation shaft 64 is rotatably supported by the bearing parts 62 and 63 around an axis P4 along the left-right direction, and a threshing clutch lever 55 is attached to the right end part of the operation shaft 64.

[0075] An arm 64a is connected to the left end part of the operation shaft 64, and a linking member 65 and a spring 66 are connected across the arm 64a of the operation shaft 64 and the threshing clutch 61. When the threshing clutch lever 55 is operated around the axis P4, the threshing clutch 61 is operated to a transmission state and an interruption state.

[0076] A cylindrical operation shaft 67 is rotatably attached to the outer surface of the operation shaft 64, and a mowing clutch lever 56 is attached to the right end part of the operation shaft 67. An arm 67a is connected to the operation shaft 67 between the left lateral surface part 49b of the lateral control part 49 and the bearing part 63, and a linking member 68 and a wire 69 are connected across the arm 67a of the operation shaft 67 and the mowing clutch. When the mowing clutch lever 56 is operated around the axis P4, the mowing clutch is operated to a transmission state and an interruption state.

[0077] (Configuration of the Cover Body Covering the Threshing Clutch Lever and the Reaping Clutch Lever) As shown in FIGS. 6, 7, and 8, a box-shaped cover body 70 is attached to the left lateral surface portion 49b of the lateral control portion 49. The cover body 70 is provided with an upper surface portion 70a, a lateral surface portion 70b, a front surface portion 70c, and a rear surface portion 70d.

[0078] The lateral surface portion 70b, the front surface portion 70c, and the rear surface portion 70d of the cover body 70 are along the vertical direction. The upper surface portion 70a of the cover body 70 is formed on an inclined surface extending obliquely downward to the left from the left lateral surface portion 49b of the lateral control portion 49. Thereby, the cover body 70 covers the bearing portion 63, the left end portion of the operating shaft 64 and the arm 64a, the left end portion of the operating shaft 67 and the arm 67a, the linking members 65, 68, etc.

[0079] A cover body 72 is attached to the left lateral surface portion 49b of the lateral control portion 49 so as to be continuous with the rear surface portion 70d of the cover body 70, and a muffler 71 of the engine 57 is disposed below the cover bodies 70 and 72. The cover body 72 is provided with an upper surface portion 72a, a lateral surface portion 72b, a front surface portion 70c, and a rear surface portion 70d, and the upper surface portion 72a of the cover body 72 is formed on an inclined surface extending obliquely downward to the left from the left lateral surface portion 49b of the lateral control portion 49.

[0080] The muffler 71 is disposed along the front-rear direction across the position below the cover body 70 and the position below the cover body 72, and the space between the lower end portion of the front surface portion 70c of the cover body 70 and the front end portion of the muffler 71 allows the linking members 65, 68, the wire 69, etc. to pass through.

[0081] (Conventional Technology, Problems, and Effects Regarding the Cover Body) When the operating shafts 64 and 67 of the threshing clutch lever 55 and the reaping clutch lever 56 protrude from the lateral surface portion 49b of the lateral control portion 49, in order to prevent straw debris, etc. from adhering to the operating shafts 64 and 67, a box-shaped cover body covering the operating shafts 64 and 67 may be attached to the lateral surface portion 49b of the lateral control portion 49. Accordingly, when the box-shaped cover is attached to the lateral surface portion 49b of the lateral control portion 49, there is room for improvement because straw waste or the like may accumulate on the cover.

[0082] When the above-mentioned (configuration of the cover covering the threshing clutch lever and the cutting clutch lever) and the cover 70 shown in FIGS. 7 and 8 are provided, since the upper surface portion 70a where straw waste or the like is likely to accumulate in the cover 70 is formed as an inclined surface, even if straw waste or the like rides on the upper surface portion 70a of the cover 70, the straw waste or the like easily slides off from the upper surface portion 70a of the cover 70. Since the lateral surface portion 70b, the front surface portion 70c, and the rear surface portion 70d of the cover 70 are along the vertical direction, it is difficult for straw waste or the like to accumulate on the lateral surface portion 70b, the front surface portion 70c, and the rear surface portion 70d of the cover 70. As described above, it is possible to obtain the cover 70 on which straw waste or the like hardly accumulates, and it is possible to reduce the problems caused by the accumulation of straw waste or the like on the cover 70.

[0083] Since the covers 70 and 72 are arranged above the muffler 71, it is possible to reduce the accumulation of straw waste or the like on the muffler 71, and it is possible to reduce the problems caused by the accumulation of straw waste or the like on the muffler 71.

[0084] (Configuration of the hydraulic oil tank) As shown in FIGS. 7, 9, and 10, a front frame 73, a lateral frame 74, and a lateral panel 75 along the vertical direction are connected to the body frame 60, and a frame-shaped frame 76 is supported by the front frame 73, the lateral frame 74, and the lateral panel 75, and a front panel 77 is attached across the body frame 60 and the frame 76. The front control portion 48 and the floor portion 58 are attached to the frame 76, and a relatively large space is formed between the front control portion 48 and the floor portion 58 and the body frame 60.

[0085] The hydraulic oil tank 78 is attached to the body frame 60 so as to be arranged along the left - right direction at the front part of the space between the front control part 48, the floor part 58 and the body frame 60. The hydraulic oil used in the lifting cylinder (refer to the above - mentioned (overall configuration of the combine)) for lifting and lowering the cutting part 3 and the conveying device 8 and the hydrostatic continuously variable transmission for traveling (refer to the above - mentioned (configuration of the operation part)) is stored in the hydraulic oil tank 78.

[0086] The separator 79 is attached to the left part of the frame 76, the hose 80 is connected to the separator 79, and a hose 81 is connected across the separator 79 and the inlet part 78a at the lower right part of the front of the hydraulic oil tank 78. The return hydraulic oil from the above - mentioned lifting cylinder and hydrostatic continuously variable transmission etc. is supplied to the separator 79 via the hose 80, air is removed in the separator 79, and it is returned to the hydraulic oil tank 78 from the inlet part 78a of the hydraulic oil tank 78 via the hose 81.

[0087] An outlet part 78b is provided at the lower part of the left part of the hydraulic oil tank 78, and a hose 82 extends from the outlet part 78b of the hydraulic oil tank 78. The hydraulic oil in the hydraulic oil tank 78 is supplied from the outlet part 78b of the hydraulic oil tank 78 via the hose 82 to the above - mentioned lifting cylinder and hydrostatic continuously variable transmission etc.

[0088] A supply port part 78c is provided at the upper part of the hydraulic oil tank 78. The operator can remove the floor part 58 from the frame 76 and open the supply port part 78c of the hydraulic oil tank 78 to replenish the hydraulic oil tank 78 with hydraulic oil from the supply port part 78c of the hydraulic oil tank 78. Since the front panel 77 and the front frame 73 are detachable, the operator can remove the hydraulic oil tank 78 by moving it forward by removing the front panel 77 and the front frame 73.

[0089] (Configuration of the battery) As shown in FIGS. 6 and 9, the battery 83 is arranged along the left - right direction at the front part of the space between the front - control part 48 and the floor part 58 and the airframe frame 60, is arranged on the rear side with respect to the hydraulic - oil tank 78, and is attached to the airframe frame 60 by the mounting fitting 84. An opening 75a is opened in the part of the horizontal panel 75 facing the battery 83, and a flat - plate - shaped lid part 85 is detachably bolt - connected to the opening 75a of the horizontal panel 75.

[0090] A stepped step 86 is provided on the right part of the airframe frame 60 so as to be swingable around the axis along the front - rear direction. In the working state, the operator operates the step 86 upward and places it in the storage position adjacent to the lid part 85 (see the two - dotted - chain line in FIG. 10). The operator can get on and off the driving part 4 using the step 86 by operating the step 86 from the storage posture to the lower use posture (see the solid lines in FIGS. 6, 9, and 10).

[0091] As shown in FIGS. 6 and 9, when the step 86 is operated to the use posture, the lateral side of the lid part 85 is opened, so that the operator can remove the lid part 85. In the state where the lid part 85 is removed, the operator can put a hand through the opening 75a of the horizontal panel 75, remove the mounting fitting 84, and pull out the battery 83 outward from the opening 75a of the horizontal panel 75, so that the replacement of the battery 83 and the like can be performed.

[0092] (Conventional technology, problems, and effects related to the hydraulic - oil tank) In some combine harvesters, the hydraulic - oil tank 78 is arranged at a position on the front side with respect to the threshing device 5. In this case, as described above (the configuration of the threshing clutch lever and the cutting clutch lever) and as shown in FIGS. 7 and 8, when the threshing clutch 61 is provided at a position on the front side with respect to the threshing device 5 and the transmission system from the threshing clutch 61 to each part of the threshing device 5 is arranged, it may be difficult to provide a hydraulic - oil tank 78 having a sufficient capacity. Therefore, there is room for improvement in terms of enabling the provision of a hydraulic - oil tank 78 having a sufficient capacity.

[0093] As described above (configuration of the hydraulic oil tank) and as shown in FIGS. 6, 7, 9, and 10, since a relatively large space is formed between the front control unit 48 and the floor unit 58 and the airframe frame 60, by arranging the hydraulic oil tank 78 in this space, a hydraulic oil tank 78 having a sufficient capacity can be provided.

[0094] Since the inlet portion 78a and the outlet portion 78b of the hydraulic oil tank 78 are sufficiently separated, even if the hydraulic oil returned to the inlet portion 78a of the hydraulic oil tank 78 contains air, it is expected that the air will escape to the upper part inside the hydraulic oil tank 78 before this hydraulic oil reaches the outlet portion 78b of the hydraulic oil tank 78.

[0095] Since a relatively large space is formed between the front control unit 48 and the floor unit 58 and the airframe frame 60, in addition to being able to provide the hydraulic oil tank 78 in this space, as described above (configuration of the battery) and as shown in FIGS. 6 and 9, the battery 83 can be provided.

[0096] (First alternative embodiment of the invention) The transmission belt 37 and the cover 40 may be provided on the left support frame 19. The transmission belt 37 may be provided on one of the left and right support frames 19, and the cover 40 may be provided on both of the left and right support frames 19.

[0097] (Second alternative embodiment of the invention) The front end portion of the side wall 14 (the portion to which the weeding tool 10 is connected) may be configured to be located in front of the front portion 44 of the cover 40.

[0098] (Third alternative embodiment of the invention) A cover (not shown) may be provided on the lifting cylinder 20 so that the lifting cylinder 20 is protected from the crop and damage to the crop is suppressed.

Industrial applicability

[0099] The present invention can be applied not only to rice harvesters but also to harvesters for other crops.

Explanation of Signs

[0100] 3 Cutting unit 8 Conveyor 9 Cutting frame 10 Weeding tool 11 Rake reel 12 Cutting device 13 Cross conveyor screw (cross conveyor) 14 Side wall 14a Upper end portion 19 Support frame 20 Lifting cylinder 23 Support bracket (position changing part) 31 Adjusting arm (tension adjusting part) 33 Mounting member (tension adjusting part) 36 Guide pulley (guide rotating body) 37 Transmission belt 37a Upper part 37b Lower part 40 Cover 42 Upper end portion 43 Bottom portion 43a Front half portion 43b Rear half portion 44 Front portion A1 Gap P1 Axis P2 Axis (fulcrum)

Claims

1. A harvester including a cutting unit for harvesting crops in a field and a conveying device for conveying the crops harvested by the cutting unit from the cutting unit, wherein the cutting unit is provided with a cutting frame having left and right side walls and connected to the conveying device, left and right support frames provided at upper positions with respect to the side walls along the front-rear direction, a raking reel rotatably supported by the support frames around an axis along the left-right direction and driven to rotate to rake the crops in the field backward, a cutting device for cutting the base of the crops in the field, a lateral feeding conveyor for conveying the harvested crops toward the conveying device, a lifting cylinder capable of changing the height of the raking reel by operating the support frame up and down around a fulcrum at the rear of the support frame, and a cover for covering the support frame from the outside, wherein the bottom portion of the cover is recessed upward with respect to the upper end portion of the side wall so that a gap from the front end portion of the cover to the lifting cylinder is formed between the bottom portion of the cover and the upper end portion of the side wall when the raking reel is operated to the lowest position, the bottom portion of the cover is provided from the front end portion to the front-rear intermediate portion of the bottom portion of the cover, and when the raking reel is operated to the lowest position, in a side view, a front half portion having a posture along the upper end portion of the side wall, and a rear half portion provided from the rear portion of the front half portion to the rear end portion of the bottom portion of the cover, and when the raking reel is operated to the lowest position, in a side view, having a posture extending from the rear portion of the front half portion toward the upper end portion of the side wall. The harvester is provided.

2. The harvester according to claim 1, further comprising left and right weed dividers extending forward from the side walls.

3. The harvester according to claim 1 or 2, wherein the front portion of the cover has a posture in which, when the raking reel is operated to the lowest position, in a side view, the lower portion of the front portion of the cover is located rearward of the upper portion of the front portion of the cover.

4. A transmission belt for transmitting rotational power to the raking reel is provided along the support frame so as to be covered by the cover, and the harvester according to any one of claims 1 to 3, further comprising a guide rotating body for guiding the lower portion of the winding path of the transmission belt to protrude upward.

5. ​ ​ The support frame of the raking reel is provided with a position changing portion that can change the mounting position along the support frame back and forth. The harvesting machine according to claim 4, further comprising a tension adjusting portion that adjusts the tension of the transmission belt accompanying the change in the mounting position of the raking reel, provided for the upper portion of the winding path of the transmission belt.

6. The harvesting machine according to claim 5, wherein the upper end portion of the cover is formed to protrude upward in a side view.

7. The harvesting machine according to claim 5 or 6, wherein the guide rotating body is located in front of the tension adjusting portion.

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