Combine harvester

Abstract

The present application provides a combine harvester, in the combine harvester provided with an engine arranged below a driver's seat and a threshing clutch capable of conducting on-off of power transmission from the engine to a threshing device, the maintenance work of the threshing clutch lever and the power transmission system for the threshing device can be easily conducted. A side panel (40) is arranged laterally to the driver's seat (7). The threshing clutch lever (42) is arranged on the side panel (40). The threshing clutch (32) is arranged at a position in front of the output shaft (9a) of the engine (9).

Description

Technical Field

[0001] This invention relates to combine harvesters. Background Technology

[0002] A combine harvester includes: a harvesting section located at the front of the traveling body for harvesting crops in a field; a threshing device for threshing the crops harvested by the harvesting section; a driver's section having a driver's seat and a side panel located to the side of the driver's seat; and an engine located below the driver's seat. For example, the combine harvester shown in Patent Document 1 is an example of such a combine harvester.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-108692 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] The aforementioned combine harvesters typically include: a threshing clutch capable of switching power transmission from the engine to the threshing unit; a threshing clutch lever located on the side panel and capable of operating the threshing clutch; and a threshing coupling mechanism that connects the threshing clutch lever to the threshing clutch. However, it is desirable to have a combine harvester that facilitates maintenance of the threshing coupling mechanism or the power transmission system of the threshing unit.

[0008] The present invention provides a combine harvester that enables easy maintenance of the threshing linkage mechanism or the power transmission system of the threshing device.

[0009] Solution for solving the problem

[0010] The combine harvester of the present invention comprises: a harvesting section disposed at the front of a traveling body for harvesting crops in a field; a threshing device for threshing the crops harvested by the harvesting section; a driving section having a driver's seat and a side panel disposed on the lateral side of the driver's seat; an engine disposed below the driver's seat; a threshing clutch capable of switching power transmission from the engine to the threshing device; a threshing clutch lever disposed on the side panel for operating the threshing clutch; and a threshing coupling mechanism for connecting the threshing clutch lever to the threshing clutch, the threshing clutch being disposed at a position forward of the output shaft of the engine.

[0011] According to this structure, since the threshing clutch is located on the driver's seat side relative to the engine's output shaft, the distance from the threshing clutch lever to the threshing clutch can be shortened, and the structure of the threshing coupling mechanism can be easily simplified. Furthermore, since the threshing coupling mechanism can be easily reached by hand or tools from the front of the machine, maintenance work on the threshing coupling mechanism can be easily performed. By positioning the power transmission system from the threshing clutch to the threshing device in the same position as the driver's seat in the longitudinal direction of the machine body, the structure of the power transmission system from the threshing clutch to the threshing device can be easily simplified, thus enabling easy maintenance work on the power transmission system to the threshing drum.

[0012] In this invention, preferably, it comprises: a harvesting clutch capable of switching power transmission from the engine to the harvesting unit; a harvesting clutch lever disposed on the side panel and capable of operating the harvesting clutch; and a harvesting coupling mechanism that connects the harvesting clutch lever to the harvesting clutch, the harvesting clutch being disposed at a position forward of the output shaft.

[0013] According to this structure, since the harvesting clutch is located on the operator's seat side relative to the output shaft, the distance from the harvesting clutch lever to the harvesting clutch can be shortened, and the structure of the harvesting coupling mechanism can be easily simplified. Furthermore, since the harvesting coupling mechanism can be easily accessed by hand or tools from the front of the machine, maintenance work on the harvesting coupling mechanism can be easily performed.

[0014] In this invention, preferably, a support shaft extending along the transverse width of the machine body and a cylinder support shaft externally embedded in the support shaft are provided. The threshing clutch rod is supported on one of the support shaft and the cylinder support shaft, and the harvesting clutch rod is supported on the other of the support shaft and the cylinder support shaft. The threshing connection mechanism has a first operating cable that extends forward and downward from the side of the support shaft or the cylinder support shaft supporting the threshing clutch rod. The harvesting connection mechanism has a second operating cable that extends forward and downward from the side of the support shaft or the cylinder support shaft supporting the harvesting clutch rod.

[0015] According to this structure, the structure of the threshing linkage mechanism can be simplified by using the first operating cable, and the structure of the harvesting linkage mechanism can be simplified by using the second operating cable. Furthermore, the first operating cable and the second operating cable can be easily reached from the front of the machine body by hand or tools, thus making it easy to perform maintenance work on the threshing linkage mechanism and the harvesting linkage mechanism.

[0016] In this invention, preferably, a secondary shaft is provided, which is located in front of the output shaft, and transmits the power transmitted from the engine to the harvesting section relative to the threshing device to the side opposite to the side where the engine is located. The first operating cable and the second operating cable extend to a position in front of the secondary shaft.

[0017] According to this structure, the first and second operating cables can be more easily reached from the front of the machine body by hand or tools, thus making it easier to perform maintenance work on the threshing and harvesting linkage mechanisms.

[0018] In this invention, it is preferred that the threshing drive belt is wound across the output shaft and the secondary shaft, and the threshing clutch is configured to switch the threshing drive belt to a tensioned state and a slack state.

[0019] According to this structure, a combine harvester can be obtained with a simple structure that only allows the threshing clutch to switch between the tensioned and slack states of the threshing drive belt.

[0020] In this invention, preferably, the harvesting clutch is located on the side opposite to the side where the threshing device is located and above the secondary shaft.

[0021] According to this structure, the harvesting clutch is located laterally outside the threshing device, but it can be positioned at a height where it is difficult for soil or other objects splashed up from the driving ground to catch on it.

[0022] In this invention, preferably, it includes a second auxiliary shaft disposed above the auxiliary shaft, which transmits power from the auxiliary shaft to the threshing drum and the harvesting section; a drive shaft disposed above the auxiliary shaft and below the second auxiliary shaft in a parallel manner, which transmits power to the harvesting section; and a harvesting drive belt wound across the second auxiliary shaft and the drive shaft. The harvesting clutch is configured to switch the harvesting drive belt between a tensioned state and a slack state.

[0023] According to this structure, a combine harvester can be obtained with a simple structure that only allows the harvesting clutch to switch between the tensioned and slack states of the harvesting drive belt.

[0024] In this invention, it is preferred that the harvesting connection mechanism and the threshing connection mechanism have an arc-shaped connecting rod that extends in an arc shape around the core of the support shaft.

[0025] According to this structure, if the harvesting clutch lever and the threshing clutch lever are switched to the engaged and disengaged positions, the bow-shaped connecting rod is activated by the switching operation. The harvesting clutch lever and the threshing clutch lever are held in the engaged and disengaged positions by the bow-shaped connecting rod. Therefore, no special operation is required to hold the harvesting clutch lever and the threshing clutch lever in the engaged and disengaged positions, and the threshing clutch and the harvesting clutch can be easily held in the engaged and disengaged states.

[0026] In this invention, preferably, the threshing clutch lever is disposed on the side where the driver's seat is located relative to the harvesting clutch lever, and is supported by the support shaft and the support shaft of the drum support shaft. The harvesting clutch lever is disposed on the side opposite to the side where the driver's seat is located relative to the threshing clutch lever, and is supported by the support shaft and the drum support shaft of the drum support shaft.

[0027] According to this structure, the harvesting clutch lever will not become an obstacle to operating the threshing clutch lever from the driver's seat. The support structure for the threshing clutch lever and the harvesting clutch lever can be formed by a simple structure consisting of a support shaft and a cylinder support shaft, and the threshing clutch lever can be operated easily. Attached Figure Description

[0028] Figure 1 This is a left view showing the overall structure of the combine harvester.

[0029] Figure 2 This is a right view showing the overall structure of the combine harvester.

[0030] Figure 3 This is a top view showing the combine harvester as a whole.

[0031] Figure 4 This is a top view of the driver's cab.

[0032] Figure 5 This is a left view showing the threshing clutch, the threshing clutch lever, and the threshing connection mechanism.

[0033] Figure 6 This is a front view showing the support structure of the threshing clutch lever and the harvesting clutch lever, as well as the threshing connection mechanism and the harvesting connection mechanism.

[0034] Figure 7 This is a top view showing the power transmission device.

[0035] Figure 8 This is a front view showing the threshing and harvesting linkage mechanisms.

[0036] Figure 9 This is the left view of the harvesting clutch.

[0037] Figure 10 This is a left view showing the threshing clutch and threshing linkage mechanism.

[0038] Figure 11 This is a left view showing the harvesting clutch and harvesting linkage mechanism.

[0039] Figure 12 It is a left view showing the engine, threshing clutch, and harvesting clutch in the perspective of the threshing device.

[0040] Explanation of reference numerals in the attached figures

[0041] 2. Running machine body

[0042] 4 Driver's Section

[0043] 6A Harvesting Section

[0044] 6b drive shaft (input shaft)

[0045] 7-seater driver's seat

[0046] 9 engines

[0047] 9a output shaft

[0048] 15 Threshing Unit

[0049] 15c threshing cylinder

[0050] 31 sub-shaft

[0051] 32 threshing clutch

[0052] 32c threshing drive belt

[0053] 35 Second Auxiliary Shaft

[0054] 37 Harvesting Clutch

[0055] 37c harvester drive belt

[0056] 40 side panel

[0057] 42 Threshing Clutch Rod

[0058] 43 Harvesting Clutch Lever

[0059] 44 support shaft

[0060] 45mm cylindrical support shaft

[0061] 50 Threshing Linkage Mechanism

[0062] 52 bow-shaped connecting rod

[0063] 54 First Operation Cable

[0064] 55 Harvesting Linkages

[0065] 57 Bow-shaped connecting rod

[0066] 58 Second Operation Cable Detailed Implementation

[0067] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0068] It should be noted that in the following description, the running gear of the combine harvester will be... Figure 1 , 2 As shown in Figure 3, arrow F points in the direction of "front of the aircraft" and arrow B points in the direction of "rear of the aircraft". Figure 1 , 2 The direction of arrow U is set to "above the body", and the direction of arrow D is set to "below the body". Figure 3 The direction of arrow L is set to "left side of the aircraft", and the direction of arrow R is set to "right side of the aircraft".

[0069] [The overall structure of a combine harvester]

[0070] like Figure 1 , 2As shown in Figure 3, the combine harvester has a traveling body 2 supported by a pair of left and right tracked traveling devices 1. The traveling body 2 has a body frame 3 constructed of multiple steel members, such as square tubing. The tracked traveling devices 1 are located at the lower part of the body frame 3. A driver's unit 4, a power unit 5, and a harvesting and conveying unit 6 are located at the front of the traveling body 2. The driver's unit 4 and the power unit 5 are located at one lateral end of the front of the traveling body 2, and the harvesting and conveying unit 6 is located on the opposite side of the front of the traveling body 2. The driver's unit 4 has a driver's seat 7 and a sunshade 8 covering the passenger space. The power unit 5 has an engine 9. The harvesting and conveying unit 6 has a harvesting section 6A located at the front of the harvesting and conveying unit 6, and a feeding device 10 extending rearward from the rear of the harvesting section 6A. In the harvesting section 6A, the tops of crops such as rice and wheat in the field are pulled backward by a rotating reel 11, and the roots of the pulled crops are cut by a shear-type harvesting device 12 to harvest the crops. The harvested crops are then transported laterally by a transverse conveying auger 13 to the supply section relative to the feeding device 10. The feeding device 10 receives the crops from the transverse conveying auger 13 and transports the received crops backward and upward. The feeding device 10 is equipped with a dust removal device 10A that uses a rotating fan to draw out and discharge dust such as straw mixed in with the transported crops. The harvesting and conveying section 6A swings between a lowering working state and an upward non-working state by the extension and retraction of a lifting cylinder 14 connected to the lower part of the feeding device 10. A threshing device 15 and a grain bin 16 are supported in a transverse arrangement at the rear of the machine frame 3. The threshing device 15 is located behind the feeding device 10. The grain bin 16 is located behind the driver's unit 4. A threshing hood 17 is provided on the lateral outer side of the threshing device 15. The threshing hood 17 is configured to be divided into multiple dividing hoods. A bin cover 18 is provided on the lateral outer side of the lower part of the grain bin 16. The threshing device 15 receives crops from the feeding device 10 and performs threshing processing, separating the grains obtained by threshing from dust such as straw fragments. The threshing device 15 is configured as a whole-stalk feeding type, in which the entire stalk from the root to the tip of the ear is fed into the threshing chamber. The grain bin 16 collects and stores the grains that have been sorted by the threshing device 15. A grain discharge device 19 is connected to the rear of the grain bin 16 to discharge the grains stored in the grain bin 16. The grain bin 16 is supported so that it can swing between a maintenance open position extending laterally outward of the traveling body 2 and a work closed position located behind the driving unit 4 in the longitudinal direction, with the shaft of the longitudinal conveying section 19A of the grain discharge device 19 as the pivot point.

[0071] [Structure of the grain discharge device]

[0072] like Figure 1 , 2As shown in Figure 3, the grain discharge device 19 includes: a longitudinal conveying section 19A extending vertically along the body of the machine and disposed behind the grain bin 16; and a transverse conveying section 19B extending vertically from the upper end of the longitudinal conveying section 19A. The lower part of the longitudinal conveying section 19A and the lower rear part of the grain bin 16 are connected via a connecting box 20. The longitudinal conveying section 19A receives grains discharged from the grain bin 16 to the connecting box 20 and conveys the received grains. The discharge of grains from the grain bin 16 is performed by a bottom spiral device (not shown) disposed in the bottom of the grain bin 16. The transverse conveying section 19B receives the grains conveyed by the longitudinal conveying section 19A and conveys the received grains laterally, discharging them from a discharge cylinder 22 provided at the extended end of the transverse conveying section 19B.

[0073] like Figure 1 , 2 As shown, a rotary drive mechanism 23 is connected at the midpoint of the longitudinal conveying section 19A. The rotary drive mechanism 23 is covered by a cover 24. The transverse conveying section 19B rotates the longitudinal conveying section 19A relative to the connecting box 20 via the rotary drive mechanism 23, rotating around the shaft of the longitudinal conveying section 19A as the center of rotation. Figure 2 , 3 As shown, an undulating cylinder 25 is connected to the base of the transverse conveying section 19B. The transverse conveying section 19B swings up and down relative to the longitudinal conveying section 19A by the extension and retraction of the undulating cylinder 25.

[0074] [Regarding power transmission in the harvesting conveyor and threshing unit]

[0075] like Figure 1 As shown, the engine 9 is located below the driver's seat 7, and the power from the engine 9 is transmitted to the power transmission device 30 of the harvesting conveyor 6 and the threshing device 15. Figure 7 As shown in the diagram.

[0076] like Figure 7 As shown, in the power transmission device 30, a secondary shaft 31 is provided at a position forward of the engine 9. The secondary shaft 31 is arranged to extend along the width direction of the machine body, spanning the side of the machine body opposite to the side where the engine 9 is located. Power from the output shaft 9a, which protrudes laterally from the engine 9 to the inner side of the machine body on the side where the engine 9 is located, is transmitted to the secondary shaft 31 via the threshing drive belt 32c. A threshing clutch 32 is provided to switch the power transmission from the engine 9 to the threshing device 15 on and off by operating the threshing drive belt 32c.

[0077] On the side of the machine body opposite to the side where the engine 9 is located, the power of the secondary shaft 31 is transmitted via the first belt drive mechanism 33 to the input shaft 15b of the sorting section 15a in the threshing device 15. The input shaft 15b of the sorting section 15a is composed of the drive shaft of the air classifier (not shown).

[0078] On the side of the machine body opposite to where the engine 9 is located, the power of the secondary shaft 31 is transmitted to the second secondary shaft 35 via the second belt drive mechanism 34, and from the second secondary shaft 35 to the rotating support shaft 15d of the threshing cylinder 15c in the threshing device 15 via the bevel gear mechanism 36. The second belt drive mechanism 34 is connected to the secondary shaft 31 at a position laterally outer of the machine body than the first belt drive mechanism 33.

[0079] On the side of the machine body opposite to where the engine 9 is located, power transmitted from the secondary shaft 31 to the second secondary shaft 35 via the second belt drive mechanism 34 is transmitted to the input shaft 6b of the harvesting conveyor 6, and from the input shaft 6b to the harvesting section 6A (rotating reel 11, harvesting device 12, and transverse conveying auger 13) via the third belt drive mechanism 38, etc. The input shaft 6b of the harvesting conveyor 6 is composed of the drive shaft of the feeding device 10. A harvesting clutch 37 is provided to switch the power transmission to the harvesting section 6A by operating the harvesting drive belt 37c wound around the second secondary shaft 35 and the input shaft 6b.

[0080] A reversing transmission mechanism 39 is provided across the second auxiliary shaft 35 and the input shaft 6b, capable of transmitting the reversing power that drives the feeding device 10 in the opposite direction to the conveying direction to the input shaft 6b. The reversing transmission mechanism 39 includes: a bevel gear 39a that meshes with a bevel gear 36a located on the rotating support shaft 15d in a bevel gear mechanism 36 that transmits power from the second auxiliary shaft 35 to the threshing cylinder 15c, and is driven in a rotational direction opposite to the rotational direction of the second auxiliary shaft 35; a rotating shaft 39b on which the bevel gear 39a is provided; and a tensioned reversing clutch 39c that transmits power from the rotating shaft 39b to the input shaft 6b.

[0081] [Structure of the threshing clutch]

[0082] like Figure 5 , 12 As shown, the threshing clutch 32 is positioned forward of the output shaft 9a of the engine 9. It is configured to switch the power transmission from the engine 9 to the threshing device 15 on and off. Furthermore, in... Figure 12 The image shows the engine 9 and the threshing clutch 32 viewed from the left lateral side in the state of the threshing device 15.

[0083] Specifically, such as Figure 5 , 7 As shown in Figure 10, a threshing drive belt 32c is wound around a pulley 32a located on the output shaft 9a of the engine 9 and a pulley 32b located on the countershaft 31. Three threshing drive belts 32c are wound together.

[0084] like Figure 5 , 7 As shown in Figure 10, the threshing clutch 32 includes a tension arm 32d as a support arm. The tension arm 32d extends oscillatingly from the boss portion provided on the traveling body 2 in a manner that supports the secondary shaft 31. The threshing clutch 32 is supported on the boss portion in a state that allows it to swing up and down with the shaft core of the secondary shaft 31 as the pivot point.

[0085] The threshing clutch 32 is engaged by a downward oscillation, switching the threshing drive belt 32c to a tensioned state, thereby activating power transmission from the engine 9 to the countershaft 31 and consequently power transmission to the threshing drum 15c in the threshing device 15. The threshing clutch 32 is disengaged by an upward oscillation, switching the threshing drive belt 32c to a slack state, thereby disengaging power transmission from the engine 9 to the countershaft 31 and consequently power transmission to the threshing drum 15c in the threshing device 15. The threshing clutch 32 is held in the disengaged state by a spring 32e connected to the tensioning arm 32d.

[0086] [Structure of the harvesting clutch]

[0087] like Figure 7 , 9 As shown in Figure 12, the harvesting clutch 37 is positioned forward of the output shaft 9a of the engine 9. Specifically, the harvesting clutch 37 is positioned forward of the output shaft 9a of the engine 9 on the side opposite to the side where the threshing device 15 is located. The harvesting clutch 37 is positioned forward of the threshing device 15, above the secondary shaft 31 and below the second secondary shaft 35. It is configured to control the switching on and off of power transmission from the engine 9 to the harvesting unit 6A. Figure 12 The image shows the engine 9 and the harvesting clutch 37 viewed from the left lateral side in the state of the threshing device 15.

[0088] Specifically, such as Figure 7 , 9 As shown in Figure 11, the input shaft 6b of the harvesting section 6A, which serves as the drive shaft for transmitting power to the harvesting section 6A, is positioned above the secondary shaft 31 and below the second secondary shaft 35, parallel to the second secondary shaft 35. A harvesting drive belt 37c is wound across the pulley 37a of the second secondary shaft 35 and the pulley 37b of the input shaft 6b. Two harvesting drive belts 37c are wound together.

[0089] like Figure 7 , 9 As shown in Figure 11, the harvesting clutch 37 includes a tension arm 37d as a support arm. The tension arm 37d extends oscillatingly from the input shaft 6b. The harvesting clutch 37 is supported on the input shaft 6b in a state that allows it to swing back and forth about the shaft center of the input shaft 6b as a pivot point.

[0090] The harvesting clutch 37 is engaged by swinging rearward, switching the harvesting drive belt 37c to a tensioned state. By engaging power transmission from the second auxiliary shaft 35 to the input shaft 6b, power transmission from the engine 9 to the harvesting unit 6A is activated. The harvesting clutch 37 is disengaged by swinging forward, switching the harvesting drive belt 37c to a slack state. By disengaging power transmission from the second auxiliary shaft 35 to the input shaft 6b, power transmission from the engine 9 to the harvesting unit 6A is cut off.

[0091] When the threshing clutch 32 is engaged, the output of the engine 9 is transmitted via the threshing clutch 32 to the countershaft 31 and from the countershaft 31 to the threshing cylinder 15c and the sorting section 15a, driving the threshing device 15. When the reversing clutch 39c is disengaged and the harvesting clutch 37 is engaged, the power transmitted from the engine 9 to the countershaft 31 is transmitted via the second belt drive mechanism 34, the second countershaft 35, and the harvesting clutch 37 to the input shaft 6b, thereby driving the feeding device 10 and the harvesting section 6A in the forward rotation direction.

[0092] Even when the threshing clutch 32 is engaged, when the harvesting clutch 37 and the reversing clutch 39c are switched to disengaged state, the power transmission from the second auxiliary shaft 35 to the input shaft 6b is also cut off by the harvesting clutch 37 and the reversing clutch 39c, causing the feeding device 10 and the harvesting section 6A to stop.

[0093] When the threshing clutch 32 is switched to the disengaged state, the power transmission from the engine 9 to the secondary shaft 31 is cut off by the threshing clutch 32, causing the threshing device 15 to stop. When the threshing clutch 32 is switched to the disengaged state, even if the harvesting clutch 37 and the reversing clutch 39c are engaged, the power transmission to the input shaft 6b is also cut off by the threshing clutch 32, causing the feeding device 10 and the harvesting section 6A to stop.

[0094] [Operating structure of threshing clutch and harvesting clutch]

[0095] like Figure 4 , 6As shown, in the driver's unit 4, a side panel 40 is provided on the lateral side of the driver's seat 7. The side panel 40 is located on the upper part of the panel box 41, which is erected on the lateral side of the driver's unit 4. The side panel 40 is configured to have a threshing clutch lever 42 and a harvesting clutch lever 43. The threshing clutch lever 42 is used to engage and disengage the threshing clutch 32, and the harvesting clutch lever 43 is used to engage and disengage the harvesting clutch 37.

[0096] Specifically, such as Figure 4 , 6 As shown, the threshing clutch lever 42 and the harvesting clutch lever 43 are arranged on the side panel 40 with the threshing clutch lever 42 positioned on the side where the driver's seat 7 is located, relative to the harvesting clutch lever 43.

[0097] A support shaft 46, having a dual-shaft structure consisting of a support shaft 44 extending along the transverse width of the machine body and a drum support shaft 45 externally embedded in the support shaft 44, is supported on the panel box 41 via a support member 47. A threshing clutch rod 42 is supported on one of the support shaft 44 and the drum support shaft 45, and a harvesting clutch rod 43 is supported on the other of the support shaft 44 and the drum support shaft 45. In this embodiment, the threshing clutch rod 42 is supported on the support shaft 44, and the harvesting clutch rod 43 is supported on the drum support shaft 45. Both the threshing clutch rod 42 and the harvesting clutch rod 43 are supported on the panel box 41 in a state where they can swing in the longitudinal direction with the pivot point P of the support shaft 44 as the pivot point.

[0098] [Structure of the threshing linkage mechanism]

[0099] like Figure 5 , 6 As shown in Figure 10, the threshing coupling mechanism 50, which connects the threshing clutch lever 42 to the threshing clutch 32, extends forward and downward from the end of the support shaft 44 on the side opposite to the threshing clutch lever 42 and connects to the operating arm 32f of the threshing clutch 32. In this embodiment, the threshing coupling mechanism 50 extends to a position forward of the countershaft 31 and connects to the operating arm 32f. The operating arm 32f extends forward from the boss portion of the tensioning arm 32d.

[0100] like Figure 6 , 8 As shown in Figure 10, the threshing linkage mechanism 50 includes a first operating cable 54, which extends forward and downward from the support shaft 44 side supporting the threshing clutch lever 42. In this embodiment, the first operating cable 54 extends to a position forward of the countershaft 31. In this embodiment, the first operating cable 54 is made of metal wire.

[0101] like Figure 10As shown, the threshing linkage 50 has an arc-shaped connecting rod 52 that extends in an arc shape around the shaft core P of the support shaft 44.

[0102] Specifically, the threshing linkage 50 includes: a swing link 51 disposed on the support shaft 44 outside the panel box 41; an arc-shaped link 52 extending forward from the free end of the swing link 51; a rod 53 extending forward and downward from the arc-shaped link 52; and a first operating cable 54 extending forward and downward from the rod 53 to a position further forward than the sub-shaft 31. A helical spring portion 53a is provided in the middle of the first operating cable 54.

[0103] When the threshing clutch lever 42 is swung in the forward and backward direction and operated to the cutting operation position, the tensioning operation of the operating arm 32f is released by the threshing linkage mechanism 50, and the tensioning arm 32d is swung by the spring 32e, so that the threshing clutch 32 is in the cut-off state by the spring 32e. In this case, by the operation of the bow-shaped link 52, which is swung by the swinging link 51 operated to the cutting operation position, the bow-shaped link 52 is switched to a cutting-holding state beyond the dead point on the cutting side, and the threshing clutch lever 42 is held in the cutting operation position by the bow-shaped link 52, so the threshing clutch 32 is held in the cut-off state.

[0104] When the threshing clutch lever 42 is swung back and forth to the engaged position, the operating arm 32f is stretched by the threshing coupling mechanism 50, and the tension arm 32d is stretched against the spring 32e, thus engaging the threshing clutch 32. In this case, through the operation of the bow-shaped link 52 by the swinging link 51, which is swung to the engaged position, the bow-shaped link 52 is switched to an engaged holding state beyond the dead point on the engaged side. The threshing clutch lever 42 is held in the engaged position by the bow-shaped link 52, and the threshing clutch 32 remains engaged.

[0105] [Structure of the harvesting linkage mechanism]

[0106] like Figure 6 , 8 As shown in Figure 11, the harvesting coupling mechanism 55, which connects the harvesting clutch lever 43 to the harvesting clutch 37, extends forward and downward from the end of the cylinder support shaft 45 on the side opposite to the harvesting clutch lever 43 and connects to the operating arm 37f of the harvesting clutch 37. In this embodiment, the harvesting coupling mechanism 55 extends to a position forward of the sub-shaft 31 and connects to the operating arm 37f. The operating arm 32f extends rearward from the boss portion of the tensioning arm 37d.

[0107] like Figure 6 , 8As shown in Figure 11, the harvesting linkage mechanism 55 includes a second operating cable 58, which extends forward and downward from the side of the cylinder support shaft 45 supporting the harvesting clutch lever 43. In this embodiment, the second operating cable 58 extends to a position further forward than the secondary shaft 31.

[0108] like Figure 11 As shown, the harvesting linkage 55 has an arc-shaped connecting rod 57 that extends in an arc shape around the shaft core P of the support shaft 44.

[0109] Specifically, the harvesting linkage mechanism 55 includes: a swing link 56 disposed outside the panel box 41 on the cylinder support shaft 45; an arc-shaped link 57 extending forward from the free end of the swing link 56; a second operating cable 58 extending forward and downward from the arc-shaped link 57 to a position further forward than the sub-shaft 31; and a helical spring portion 58a connecting the second operating cable 58 to the operating arm portion 37f.

[0110] like Figure 8 , 11 As shown, the second operating cable 58 is configured as follows: it extends forward and downward from the bow-shaped connecting rod 57, extends backward from a position closer to the front of the secondary shaft 31, extends from below the end of the secondary shaft 31 on the threshing clutch side, extends laterally outward along the width of the machine body below the secondary shaft 31, extends backward from below the end of the secondary shaft 31 on the side opposite to the threshing clutch side, and extends upward from a position closer to the rear of the secondary shaft 31 to reach the helical spring section 58a.

[0111] When the harvesting clutch lever 43 is swung back and forth and operated to the engaged position, the operating arm 37f is stretched by the harvesting coupling mechanism 55, the tension arm 37d is operated to the engaged position, and the harvesting clutch 37 is engaged. In this case, through the operation of the bow-shaped link 57 by the swinging link 56, which is swung by operating the harvesting clutch lever 43 to the engaged position, the bow-shaped link 57 is switched to an engaged holding state beyond the dead point on the engaged side, the harvesting clutch lever 43 is held in the engaged position by the bow-shaped link 57, and the harvesting clutch 37 is held in the engaged state.

[0112] When the harvesting clutch lever 43 is swung in the forward and backward direction and operated to the cutting position, the tensioning operation of the operating arm 37f by the harvesting coupling mechanism 55 is released, and the tensioning arm 37d swings down due to gravity and becomes the cutting position, thus the harvesting clutch 37 is in the cut-off state. In this case, through the operation of the bow-shaped link 57 by the swinging link 56, which is swung by operating the harvesting clutch lever 43 to the cutting position, the bow-shaped link 57 is switched to a cutting holding state beyond the dead point on the cutting side, and the harvesting clutch lever 43 is held in the cutting position by the bow-shaped link 57, thus the harvesting clutch 37 is held in the cut-off state.

[0113] [Other Implementation Methods]

[0114] (1) In the above embodiment, an example is shown in which the threshing linkage mechanism 50 and the harvesting linkage mechanism 55 are configured as mechanical mechanisms, but this is not a limitation. For example, an electrical threshing linkage mechanism and a harvesting linkage mechanism may be configured by a switch operated by the threshing clutch lever 42 and the harvesting clutch lever 43, an electric actuator that operates the threshing clutch 32 and the harvesting clutch 37, and a cable that connects the switch and the electric actuator.

[0115] (2) In the above embodiment, a structure is adopted in which the threshing clutch rod 42 is supported on the support shaft 44 and the harvesting clutch rod 43 is supported on the drum support shaft 45. However, a structure in which the threshing clutch rod 42 is supported on the drum support shaft 45 and the harvesting clutch rod 43 is supported on the support shaft 44 can also be adopted. In addition, two support shafts with the shaft cores in different states can be adopted.

[0116] (3) In the above embodiment, an example is shown in which the threshing clutch lever 42 is located on the side of the driver's seat 7 relative to the harvesting clutch lever 43, but it is not limited to this. It is also possible that the threshing clutch lever 42 is located on the opposite side of the driver's seat 7 relative to the harvesting clutch lever 43.

[0117] (4) In the above embodiment, an example with a secondary shaft 31 is shown, but it is not limited to this. The harvesting clutch 37 may also be provided on the side of the machine body where the threshing clutch 32 is located, without the secondary shaft 31.

[0118] (5) In the above embodiments, an example is shown that a threshing clutch 32 that switches the threshing drive belt 32c to a tensioned state and a slack state and a harvesting clutch 37 that switches the harvesting drive belt 37c to a tensioned state and a slack state are used, but it is not limited to this, and a meshing threshing clutch and a harvesting clutch may also be used.

[0119] (6) An example is shown in which the harvesting clutch 37 is positioned above the secondary shaft 31, but this is not a limitation. For example, the harvesting clutch 37 may also be positioned below the secondary shaft 31 or at the location of the secondary shaft 31 in the vertical direction of the machine body.

[0120] (7) In the above embodiment, an example of a structure in which power is transmitted from the second secondary shaft 35 to the input shaft 6b is shown, but power can also be transmitted from the secondary shaft 31 to the input shaft 6b without passing through the second secondary shaft 35.

[0121] (8) In the above embodiments, an example is shown in which the threshing linkage 50 and the harvesting linkage 55 are equipped with bow-shaped connecting rods 52 and 57, but the bow-shaped connecting rods 52 and 57 may not be provided.

[0122] Industrial applicability

[0123] This invention can be applied to a combine harvester having a harvesting section located at the front of the traveling body, a threshing device for threshing crops harvested by the harvesting section, and an engine located below the driver's seat.

Claims

1. A combine harvester, wherein, The combine harvester has the following features: The harvesting section is located at the front of the traveling machine body and is used to harvest crops in the field; A threshing device for threshing crops harvested by the harvesting unit; The driving unit has a driver's seat and a side panel disposed on the lateral side of the driver's seat; An engine, which is located below the driver's seat; A threshing clutch, capable of switching on and off the power transmission from the engine to the threshing device; A threshing clutch lever is disposed on the side panel and is capable of operating the threshing clutch. as well as A threshing connection mechanism that connects the threshing clutch lever to the threshing clutch. The threshing clutch is located forward of the engine's output shaft. The combine harvester has the following features: A harvesting clutch, which is capable of switching on and off the power transmission from the engine to the harvesting unit; A harvesting clutch lever is disposed on the side panel and is capable of operating the harvesting clutch. as well as A harvesting linkage mechanism that connects the harvesting clutch lever to the harvesting clutch. The harvesting clutch is positioned forward of the output shaft. It is equipped with a support shaft extending along the transverse width direction of the body and a cylindrical support shaft externally embedded in the support shaft. The threshing clutch rod is supported on one of the support shaft and the cylinder support shaft. The harvesting clutch rod is supported on one of the support shaft and the cylinder support shaft. The threshing and connecting mechanism includes a first operating cable. The first operating cable extends forward and downward from the support shaft or the cylinder support shaft side that supports the threshing clutch rod. The harvesting linkage mechanism is equipped with a second operating cable. The second operating cable extends forward and downward from the support shaft or the cylinder support shaft side that supports the harvesting clutch lever. The combine harvester has a secondary shaft positioned forward of the output shaft. This secondary shaft transmits power from the engine to the harvesting section in a direction opposite to the side where the engine is located, relative to the threshing device. The first operating cable and the second operating cable extend to a position further forward than the secondary shaft.

2. The combine harvester as described in claim 1, wherein, The combine harvester has a threshing drive belt wound across the output shaft and the auxiliary shaft. The threshing clutch is configured to switch the threshing drive belt between a tensioned state and a slack state.

3. The combine harvester as described in claim 1 or 2, wherein, The harvesting clutch is located on the side opposite to the side where the threshing device is located and above the secondary shaft.

4. The combine harvester as described in claim 1, wherein, The combine harvester has a second auxiliary shaft, which is positioned above the main shaft and transmits power from the auxiliary shaft to the threshing drum and the harvesting section. The combine harvester includes a drive shaft, which is positioned above the secondary shaft and below the second secondary shaft, parallel to the second secondary shaft, and transmits power to the harvesting section. The combine harvester has a harvesting drive belt wound across the second auxiliary shaft and the drive shaft. The harvesting clutch is configured to switch the harvesting drive belt between a tensioned state and a slack state.

5. The combine harvester as described in claim 1 or 2, wherein, The harvesting linkage and the threshing linkage are provided with an arc-shaped connecting rod that extends in an arc shape around the core of the support shaft.

6. The combine harvester as described in claim 1 or 2, wherein, The threshing clutch lever is positioned relative to the harvesting clutch lever on the side where the driver's seat is located, and is supported by the support shaft and the support shaft in the drum support shaft. The harvesting clutch lever is positioned on the side opposite to the side where the driver's seat is located, relative to the threshing clutch lever, and is supported by the support shaft and the cylinder support shaft.

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