combine

Abstract

To realize a combine-harvester that simplifies an operation mechanism of a feed chain clutch.SOLUTION: A combine-harvester includes: a thresher 6; a feed chain 15 which conveys reaped grain culms to the thresher; a feed chain clutch which can be switched between a transmission state that transmits power to the feed chain 15 and a shutdown state that does not transmit the power to the feed chain 15; an actuator 100; a first mechanism A which is activated by the first action of the actuator 100 to switch the feed chain clutch to the transmission state or shutdown state; and a second mechanism B which is activated by a second operation that is the operation of the actuator 100 and is different from the first operation and switches the feed chain clutch from the transmission state to the shutdown state.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a combine harvester. [Background technology]

[0002] The combine harvester of Patent Document 1 is equipped with a lifting and lowering interlocking operation mechanism that operates the feed chain clutch in conjunction with the raising and lowering of the cutting part to disconnect and lower the feed chain clutch, as well as a forced disconnection operation mechanism that operates the feed chain clutch in conjunction with the manual operation of the stop switch.

[0003] The forced cutoff operating mechanism is operated by a cutoff motor installed on the side of the threshing machine. The interlock stop operating mechanism is a mechanical mechanism that, when the reaping unit rises to the non-reaping level, the tension in the interlock wire increases in conjunction with this rise, operating the clutch operating arm to the off position. When the reaping unit descends to the reaping level, the tension in the interlock wire decreases, operating the clutch operating arm 37 to the on position. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-065472 Summary of the Invention [Problem to be solved by the invention]

[0005] The reaping unit is located at the front of the machine body, and the feed chain clutch is located at the rear of the machine body. This requires that the interlocking wire of the forced cutoff operating mechanism be installed long from the front to the rear of the machine body. In addition, the interlocking stop operating mechanism is a mechanical mechanism that is interlocked with the elevation of the reaping unit, and therefore has a complex structure. In other words, there is room for simplification of the configuration of the conventional feed chain clutch operating mechanism.

[0006] An object of the present invention is to realize a combine harvester with a simplified feed chain clutch operating mechanism. [Means for solving the problem]

[0007] As a means for solving the above-mentioned problems, a combine harvester of the present invention includes a threshing device, a feed chain for transporting reaped stalks to the threshing device, a feed chain clutch switchable between a transmission state in which power is transmitted to the feed chain and a disconnection state in which power is not transmitted to the feed chain, an actuator, and a power supply unit that is actuated by a first operation of the actuator to switch the feed chain clutch to the transmission state. and The feed chain clutch is characterized by comprising a first mechanism that switches to the disconnected state, and a second mechanism that operates by a second operation of the actuator that is different from the first operation, thereby switching the feed chain clutch from the transmitted state to the disconnected state.

[0008] According to the above features, a combine harvester is provided with a first mechanism and a second mechanism that are operated by an actuator to switch the state of the feed chain clutch, thereby enabling a combine harvester with a simplified feed chain clutch operating mechanism. For example, if the actuator is located near the feed chain clutch, there is no need to run a long interlocking wire from the cutting unit at the front of the machine body to the feed chain clutch at the rear of the machine body, as in conventional combine harvesters. Furthermore, there is no need to provide a mechanical mechanism that interlocks with the raising and lowering of the cutting unit, as in conventional combine harvesters. Thus, the above configuration enables a combine harvester with a simplified feed chain clutch operating mechanism.

[0009] In the present invention, it is preferable that the first operation is one of a forward rotation operation and a reverse rotation operation of the actuator, and the second operation is the other of the forward rotation operation and the reverse rotation operation of the actuator.

[0010] According to the above feature, the feed chain clutch is operated by the forward and reverse rotation of the actuator, so that the control mode can be simplified.

[0011] In the present invention, it is preferable that the first mechanism comprises an operating wire that transmits an operating force to the feed chain clutch, a biasing member that biases the operating wire toward the feed chain clutch, a first member that moves in conjunction with the first operation of the actuator, and a second member to which the operating end of the operating wire is connected and which is pushed by the first member to move in rotation.

[0012] According to the above feature, the operating wire is operated by the second member that rotates, so that the feed chain clutch can be smoothly engaged and disengaged.

[0013] The combine harvester of the present invention comprises a threshing device, a feed chain for transporting harvested stalks to the threshing device, a feed chain clutch switchable between a transmission state in which power is transmitted to the feed chain and a disconnection state in which power is not transmitted to the feed chain, an actuator, a first mechanism that is actuated by a first operation of the actuator to switch the feed chain clutch between the transmission state and the disconnection state, and a second mechanism that is actuated by a second operation of the actuator that is different from the first operation to switch the feed chain clutch from the transmission state to the disconnection state, wherein the first operation is , is one of the forward and reverse rotation operations of the actuator, and the second operation is the other of the forward and reverse rotation operations of the actuator, and the first mechanism comprises an operating wire that transmits an operating force to the feed chain clutch, a biasing member that biases the operating wire toward the feed chain clutch, a first member that moves in conjunction with the first operation of the actuator, and a second member to which an operating end of the operating wire is connected and which is pushed by the first member to rotate and move, and the first member rotates and moves around the same axis as the axis of rotation of the second member.

[0014] According to the above characteristics, Since the combine harvester is provided with a first mechanism and a second mechanism that are operated by an actuator to switch the state of the feed chain clutch, it is possible to realize a combine harvester with a simplified feed chain clutch operating mechanism. For example, if the actuator is located near the feed chain clutch, it is not necessary to lay a long interlocking wire from the cutting section at the front of the machine to the feed chain clutch at the rear of the machine, as in conventional combine harvesters. Also, it is not necessary to provide a mechanical mechanism that is interlocked with the raising and lowering of the cutting section, as in conventional combine harvesters. In this way, with the above configuration, it is possible to realize a combine harvester with a simplified feed chain clutch operating mechanism. Furthermore, since the operating wire is operated by the second member that rotates and moves, the feed chain clutch can be smoothly switched on and off. And, Since the first member and the second member rotate about the same axis, the first mechanism can be configured compactly.

[0015] The combine harvester of the present invention comprises a threshing device, a feed chain for transporting harvested stalks to the threshing device, a feed chain clutch switchable between a transmission state in which power is transmitted to the feed chain and a disconnection state in which power is not transmitted to the feed chain, an actuator, a first mechanism that is actuated by a first operation of the actuator to switch the feed chain clutch between the transmission state and the disconnection state, and a second mechanism that is actuated by a second operation of the actuator that is different from the first operation to switch the feed chain clutch from the transmission state to the disconnection state, The second mechanism includes a ratchet mechanism that rotates freely during the first operation and transmits power downstream during the second operation. It is characterized by:

[0016] According to the above characteristics, Since the combine harvester is provided with a first mechanism and a second mechanism that are operated by an actuator to switch the state of the feed chain clutch, it is possible to realize a combine harvester with a simplified feed chain clutch operating mechanism. For example, if the actuator is located near the feed chain clutch, it is not necessary to lay a long interlocking wire from the cutting section at the front of the machine body to the feed chain clutch at the rear of the machine body, as in conventional combine harvesters. Also, it is not necessary to provide a mechanical mechanism that interlocks with the raising and lowering of the cutting section, as in conventional combine harvesters. In this way, with the above configuration, it is possible to realize a combine harvester with a simplified feed chain clutch operating mechanism. Also, Since the ratchet mechanism rotates idly during the first operation, the influence of the first operation of the actuator on the first mechanism can be suppressed.

[0017] In the present invention, it is preferable that the second mechanism includes an operating member that operates the feed chain clutch, a biasing mechanism that biases the operating member in a predetermined direction, and a position holding mechanism that holds the operating member in a predetermined position and releases the holding of the operating member in response to the second operation of the actuator.

[0018] According to the above feature, the second operation releases the holding of the operating member, and the operating member operates the feed chain clutch due to the biasing force of the biasing mechanism. Therefore, the feed chain clutch is quickly operated by the second mechanism.

[0019] In the present invention, it is preferable that the first mechanism and the second mechanism are arranged on the left side of the threshing device.

[0020] According to the above features, the first mechanism and the second mechanism are arranged near the feed chain clutch, which is often arranged on the left side of the threshing device, thereby simplifying the operating mechanism of the feed chain clutch.

[0021] In the present invention, it is preferable that the actuator is arranged below the feed chain on the left side of the threshing device.

[0022] According to the above feature, the actuator is arranged near the feed chain clutch, which is often arranged on the left side of the threshing device, thereby simplifying the operating mechanism of the feed chain clutch.

[0023] In the present invention, it is preferable that the device comprises a first operating tool, a second operating tool, and a control device that controls the actuator, and that the control device causes the actuator to perform the first operation in response to operation of the first operating tool, and causes the actuator to perform the second operation in response to operation of the second operating tool.

[0024] According to the above feature, the feed chain clutch can be operated by the first operating tool and the second operating tool.

[0025] In the present invention, it is preferable that the first operating tool is disposed in a driver's section in which a driver sits.

[0026] According to the above feature, the operator in the driver's section can switch the feed chain clutch between the transmission state and the disconnection state.

[0027] In the present invention, it is preferable that the second operating tool be disposed on the left side of the aircraft body.

[0028] According to the above feature, the operator on the left side of the machine body can easily switch the feed chain clutch to the disengaged state. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 is an overall side view of a combine harvester. [Figure 2] FIG. 1 is an overall plan view of a combine harvester. [Figure 3] FIG. [Figure 4] FIG. 2 is a cross-sectional view of a transmission mechanism for a feed chain. [Figure 5] FIG. 10 is a side view showing a mechanism for operating the feed chain clutch. [Figure 6] FIG. 4 is a plan view showing the cutoff switching operation mechanism in a transmitted state. [Figure 7] 10 is a plan view showing the cutoff switching operation mechanism in a state where it has been switched to the cutoff state by the command stop operation mechanism. FIG. [Figure 8] 10 is a plan view showing the cutoff switching operation mechanism in a state switched to the cutoff state by the interlock stop operation mechanism. FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. 2 is a side view showing a main part of the operating mechanism. [Figure 12] FIG. 10 is a side view showing the main parts of the operating mechanism when the first action is performed. [Figure 13] FIG. 10 is a side view showing the main parts of the operating mechanism when the first action is performed. [Figure 14] FIG. 10 is a side view showing the main parts of the operating mechanism when the second action is performed. [Figure 15] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0030] A head-feeding combine harvester, which is an example of a combine harvester according to the present invention, will be described below with reference to the drawings. Note that the present invention is not limited to the following embodiment, and various modifications are possible without departing from the spirit and scope of the present invention.

[0031] [Overall structure] As shown in Figs. 1 and 2, the head-feeding combine harvester is provided with a reaping unit 3 for reaping planted stalks at the front of a traveling body 2 that is self-propelled by a pair of left and right crawler traveling devices 1,1. A driving section 5 surrounded by a cabin 4 is provided on the front right side of the traveling body 2. Behind the driving section 5, a threshing device 6 that threshes the stalks harvested by the harvesting section 3 and a grain tank 7 that stores the grains obtained by the threshing process are arranged side by side. An engine 9 serving as a power source for driving each part of the machine body is provided below an operator's seat 8 in the operator's section 5. A threshing clutch 6a (FIG. 15) is provided to turn on and off the power transmission to the threshing device 6.

[0032] In this embodiment, the longitudinal direction of the machine body is defined along the traveling direction of the machine body in the working state, and the left-right direction of the machine body is defined as viewed from the traveling direction of the machine body. That is, in the drawings, the direction indicated by the symbol (FW) is the front side of the machine body, and the direction indicated by the symbol (BW) in Figures 1 and 2 is the rear side of the machine body. The direction indicated by the symbol (LH) is the left side of the machine body, and the direction indicated by the symbol (RH) is the right side of the machine body. The direction indicated by the symbol (UP) is up, and the direction indicated by the symbol (DW) is down.

[0033] The harvesting section 3 is equipped with a weeding tool 10 that guides the base of the planted culms to be harvested, a plurality of lifting devices 11 that lift the planted culms that have been harvested into a vertical position, a clipper-type harvesting device 12 that cuts the base of the lifted planted culms, and a conveying device 13 that gradually changes the position of the harvested culms from a vertical position to a horizontal position while transporting them backward and supplying them to the threshing device 6. The upper side of the conveying device 13 is covered with a dust cover 14 .

[0034] The reaping unit 3 is configured to be able to move up and down by a hydraulic lifting cylinder 3a (Fig. 15). Also, a reaping clutch 3b (Fig. 15) that turns on and off the power transmission to the reaping unit 3 is provided.

[0035] On the left side of the threshing device 6, there is provided a feed chain 15 that transports the harvested stalks to the threshing device 6, and a clamping rail 16 that is provided above and opposite the feed chain 15. Behind the threshing device 6, there is provided a straw discharge cutter 17 that cuts the straw discharged from the threshing device 6. The grain tank 7 is provided with a grain discharge device 18 that discharges the grain stored in the grain tank 7 outside the machine.

[0036] The threshing device 6 threshes the tip side of the harvested stalks in a threshing chamber 19 while clamping and transporting the base side of the harvested stalks with a feed chain 15 and a clamping rail 16. A threshing drum 20 is provided in the threshing chamber 19.

[0037] [Feed chain transmission structure] 3, the feed chain 15 is wound around a drive sprocket 47 located on the rear side and a driven sprocket 48 located on the front side. A feed chain clutch 49 is provided which can be switched between a transmission state in which power is transmitted to the feed chain 15 and a disconnection state in which power to the feed chain 15 is disconnected. The feed chain clutch 49 is provided on a drive shaft 50 which rotatably supports the drive sprocket 47.

[0038] As shown in Fig. 4, power from the engine 9 is transmitted to the feed chain clutch 49 via a transmission case 54. Describing the transmission case 54 in more detail, the power from the engine 9 is transmitted to an intermediate shaft 53 via a transmission belt 51 and an input pulley 52, and is then transmitted from the intermediate shaft 53 to a rotating shaft 57 of the dust exhaust fan 22 via gears 55 and 56. Furthermore, the power from the rotating shaft 57 is transmitted via a two-stage reduction gear mechanism 58 to a drive gear 59 that is externally fitted to the drive shaft 50 so as to be rotatable relative to the drive shaft 50. The power from the drive gear 59 is transmitted intermittently to the drive sprocket 47 of the feed chain 15 via the feed chain clutch 49.

[0039] A driven-side shift member 60 is spline-fitted onto the drive shaft 50 so as to be rotatable integrally with the drive shaft 50 and movable in the axial direction. A drive-side meshing portion 61 made up of meshing pawls is formed on the surface of the drive gear 59 facing the driven-side shift member 60. A driven-side meshing portion 62 made up of meshing pawls is formed on the surface of the driven-side shift member 60 facing the drive gear 59. The feed chain clutch 49 is made up of the drive-side meshing portion 61 and the driven-side meshing portion 62. Power from the reduction gear mechanism 58 is transmitted to the drive gear 59, and power from the drive gear 59 is transmitted via the feed chain clutch 49, the drive shaft 50, and the drive sprocket 47 to the feed chain 15.

[0040] The feed chain clutch 49 can be switched between a transmission state in which the driven shift member 60 moves toward the drive gear 59 and engages a drive-side meshing portion 61 with a driven-side meshing portion 62, and a disengagement state in which the driven shift member 60 moves toward the drive sprocket 47 and disengages the drive-side meshing portion 61 from the driven-side meshing portion 62. A coil spring 63 that biases the driven shift member 60 toward the drive gear 59 is fitted around the drive shaft 50. In other words, the driven shift member 60 is biased toward the clutch-engaged position.

[0041] A multi-plate friction brake mechanism 64 is provided on the drive shaft 50 at a location on the drive sprocket 47 side of the driven shift member 60. The brake mechanism 64 is configured to apply a braking force to the driven shift member 60 when the driven shift member 60 is operated to the OFF position by an external operating force, as described below.

[0042] [Configuration related to operation of the feed chain clutch] The combine harvester of this embodiment includes an electric motor 100 (an example of an actuator), a first mechanism A, and a second mechanism B. The first mechanism A is actuated by a first operation of the electric motor 100 to switch the feed chain clutch between a transmission state and a disengagement state. The second mechanism B is actuated by a second operation of the electric motor 100 that is different from the first operation to switch the feed chain clutch from the transmission state to the disengagement state.

[0043] The first mechanism A and the second mechanism B are connected to an operating unit 65 that can be switched between an ON position corresponding to the transmission state of the feed chain clutch 49 and an OFF position corresponding to the disconnected state. The first mechanism A includes an interlocking stop operation mechanism 109, which will be described later. The second mechanism B includes a command stop operation mechanism 66 that operates an operation unit 65 to switch the feed chain clutch 49 to a disconnected state based on an artificial stop command. The operation unit 65 and the command stop operation mechanism 66 together constitute a disconnection switching operation mechanism 67 that can switch the feed chain clutch 49 to a disconnected state.

[0044] [Operation unit] The operating unit 65 will now be described. As shown in FIGS. 4 to 6, the operating unit 65 is equipped with a shifter member 68 as a shift fork-type operating member that can be operated to separate the drive gear 59 and the driven shift member 60, and a clutch operating arm 69 that can rotate integrally with the shifter member 68 around the rotation axis of the shifter member 68. The shifter member 68 is housed in the transmission case 54. The shifter member 68 has a support shaft portion 68a that is supported by the transmission case 54 so as to be rotatable about axis Y4 that extends in the rearward-upward tilt direction, and an engagement operating portion 68b that engages with the outer periphery of the driven shift member 60.

[0045] A clutch operating arm 69 is connected to the support shaft 68a at a location that protrudes outward from the transmission case 54 so as to be able to rotate integrally with it. The clutch operating arm 69 is formed in the shape of a linearly extending strip, and its longitudinal middle portion is connected to the support shaft 68a. The clutch operating arm 69 is arranged so that its longitudinal direction roughly follows the side wall 6A of the threshing device 6, thereby making the installation space in the left-right direction more compact.

[0046] The biasing force of coil spring 63 biases driven shift member 60 toward drive gear 59, so clutch operating arm 69 is rotated toward the engaged position (transmitted state). When clutch operating arm 69 is rotated in a predetermined direction, specifically, leftward in the plan view shown in FIG. 6, by an external operating force, engagement operating portion 68b is configured to shift driven shift member 60 in the direction to release the engagement.

[0047] [Command stop operation mechanism] Next, the command stop operation mechanism 66 will be described. As shown in Figures 5 and 6, the command stop operation mechanism 66 includes a breaking coil spring 70 as a biasing mechanism that biases the operation unit 65 to switch it to the OFF position, a position holding mechanism 71 that holds the operation unit 65 in the ON position, and a linking mechanism 72 that links the operation unit 65 and the position holding mechanism 71 and receives the biasing force of the breaking coil spring 70.

[0048] The breaking coil spring 70 has a biasing force greater than the biasing force of the coil spring 63 that biases the driven-side shift member 60 toward the clutch-engaged position. The position retention mechanism 71 that retains the operating part 65 in the engaged position is released by an operating mechanism 73, which will be described later.

[0049] The linking mechanism 72 will now be described. As shown in Figures 5 and 6, the linking mechanism 72 is configured to link the operating unit 65 to the on position using a position holding mechanism 71, and to press the clutch operating arm 69 using the biasing force of the breaking coil spring 70 when the position holding is released by an actuation mechanism 73.

[0050] The linkage mechanism 72 is provided with a linear horizontal link 74 that is slidable in the horizontal direction, and a pressure link 75 that presses the clutch operating arm 69 by the sliding movement of the horizontal link 74. The pressure link 75 is linked to one end of the horizontal link 74, and the position holding mechanism 71 is linked to the other end of the horizontal link 74.

[0051] The horizontal link 74 is provided extending in the front-to-rear direction along the side wall 6A of the threshing device 6. A groove-shaped guide member 76 is provided to support the horizontal link 74 so that it can slide in the front-to-rear direction. The guide member 76 is fixed to the side wall 6A of the threshing device 6. Spindles 77a, 77b that penetrate vertically are fixedly attached to both sides of the horizontal link 74 in the longitudinal direction (front-to-rear direction). Guide rollers 78 are provided at the bottom of each of the front and rear spindles 77a, 77b. The guide rollers 78 are located inside the guide member 76 and guide the movement of the guide member 76 while rolling on the inner surface of the guide member 76. An end of the pressure link 75 is pivotally connected to the top of the front spindle 77a. An end of the position holding mechanism 71 is pivotally connected to the top of the rear spindle 77b.

[0052] The pressure link 75 is provided with three pressure arms 80, 81, 82 that can rotate integrally with an up-down rotating support shaft 79. The rotating support shaft 79 is supported rotatably around the up-down axis X1 by a boss portion 83 fixed to the side wall 6A of the threshing device 6. One end of the cutoff coil spring 70 is engaged with the swinging end of the first pressure arm 80. The swinging end of the second pressure arm 81 is provided with a command stop operation pin 84 that applies pressure to the clutch operation arm 69.

[0053] A vertically oriented connecting shaft 85 is provided at the swing end of the third pressing arm 82, and a boss portion 87 provided at one end of an interlocking link 86 is rotatably connected to this connecting shaft 85. A boss portion 88 on the other end of the interlocking link 86 is rotatably connected to a support shaft 77 on the front side of the horizontal link 74 .

[0054] 6, when the first pressing arm 80 is urged to swing forward by the urging force of the breaking coil spring 70, a force acts in a direction in which the command stop operation pin 84 provided on the second pressing arm 81 presses the clutch operation arm 69, and a force acts on the third pressing arm 82 to push the support shaft 77 on the front side of the horizontal link 74 diagonally rightward. This pushing force acts on the horizontal link 74 so as to slide it rearward.

[0055] However, the horizontal link 74 is prevented from moving rearward and is held in the front slide position by the position holding mechanism 71. In this position holding state, the command stop operation pin 84 does not press and operate the clutch operating arm 69, and the clutch operating arm 69 is held in the engaged position.

[0056] The position retention mechanism 71 will now be described. As shown in Figures 5 and 6, the position retention mechanism 71 retains the position of the horizontal link 74, which is being forced to slide rearward by the biasing force of the breaking coil spring 70 as described above, at the front side, thereby retaining the clutch operating arm 69 in the engaged position. The position retention mechanism 71 includes a first retention arm 89 connected to the rear side of the horizontal link 74, and a second retention arm 90 connected to the operating mechanism 73 side.

[0057] A boss 91 is provided at one end of the first holding arm 89, and this boss 91 is connected to the support shaft 77b on the rear side of the horizontal link 74 so as to be swingable about the vertical axis X2. A boss 92 is provided at the other end of the first holding arm 89, and this boss 92 is connected to a connecting shaft 93 provided at one end of the second holding arm 90 so as to be swingable relative to the support shaft 77b. A spring 94 is stretched between the first holding arm 89 and the second holding arm 90, and biases the first holding arm 89 and the second holding arm 90 so as to bend and swing forward.

[0058] A support shaft 96 is supported in a fixed position on a bracket 95 fixed to the side wall 6A of the threshing device 6. A boss portion 97 is integrally provided at the other end of the second holding arm 90, and is rotatably fitted onto the support shaft 96. A connecting arm 98, to which the operating mechanism 73 is connected, is integrally provided with the boss portion 97.

[0059] The second holding arm 90 is provided with a contact restriction portion 99 that contacts the end edge of the first holding arm 89 to restrict relative swinging forward. The contact restriction portion 99 contacts the end edge of the first holding arm 89 at a position where the pivot connection point X3 between the first holding arm 89 and the second holding arm 90 is slightly closer to the front than an imaginary line connecting the swing axis X2 of one end of the first holding arm 89 and the swing axis X4 of the other end of the second holding arm 90, restricting further bending and swinging forward. With the relative swinging forward restricted by the contact restriction portion 99, the horizontal link 74, which is biased to move rearward, is restricted in position and enters a position-maintaining state.

[0060] [Interlocked stop operation mechanism] An interlocking stop operating mechanism 109 is provided which switches the feed chain clutch 49 to a disengaged state by operating the operating part 65. As shown in Figures 5 and 6, the interlocking stop operating mechanism 109 includes a pushing part 111 which applies a pushing force to the clutch operating arm 69, an interlocking operating wire 112 which connects the operating mechanism 73 and the pushing part 111, and the like.

[0061] As shown in Figure 6, the pushing portion 111 is provided in a position close to the opposite side of the clutch operating arm 69 in the longitudinal direction from the side on which the command stop operating pin 84 acts. The pushing portion 111 is provided with a support shaft 113 fixedly supported on the side wall 6A of the threshing device 6, a boss portion 114 rotatably fitted onto the support shaft 113, two arms 115 and 116 extending radially outward in a generally L-shaped configuration in plan view at different positions in the circumferential direction from the outer periphery of the boss portion 114, and a return spring 117.

[0062] One of the two arms, a first arm 115, extends integrally from a boss portion 114 toward the left side. An interlocking operation wire 112 is connected to the swinging end of the first arm 115 via a stroke absorbing spring 119. The other of the two arms, a second arm 116, extends integrally from the boss portion 114 toward the rear side. An interlocking stop operation pin 120 that can come into contact with the clutch operation arm 69 and be pressed is provided at the swinging end of the second arm 116.

[0063] In the pushing portion 111, when the interlocking operation wire 112 is pulled, the first arm 115 and the second arm 116 swing clockwise in a plan view around the axis X6 of the support shaft 113. Accordingly, the interlocking stop operation pin 120 swings in a direction that applies pressure to the clutch operation arm 69. As a result, the shifter member 68 rotates to shift the driven shift member 60 and switch the feed chain clutch 49 to the disengaged state.

[0064] In this case, as with the command stop operation mechanism 66, the driven-side shift member 60 switches to the disconnected state, and is pressed against the braking mechanism 64 by the large biasing force of the disconnecting coil spring 70, thereby applying a braking force. By braking, rotation due to the inertial force of the feed chain 15 can be suppressed, and the feed chain 15 can be stopped quickly.

[0065] When the interlocking operation wire 112 is not being pulled, the interlocking stop operation pin 120 moves in a direction away from the clutch operation arm 69 due to the biasing force of the return spring 117, and the clutch operation arm 69 is returned to the in position by the biasing force of the coil spring 63.

[0066] [Buffer mechanism] The buffer mechanism for linking the command stop operation mechanism 66 and the interlocking stop operation mechanism 109 with the operation unit 65 will be described. A first buffer mechanism K1 that links the command stop operation mechanism 66 with the operation unit 65 and a second buffer mechanism K2 that links the interlocking stop operation mechanism 109 with the operation unit 65 are provided, and the first buffer mechanism K1 and the second buffer mechanism K2 are configured so that when one of the command stop operation mechanism 66 and the interlocking stop operation mechanism 109 switches to the disconnected state, the operating force of the one mechanism is not transmitted to the other of the command stop operation mechanism 66 and the interlocking stop operation mechanism 109.

[0067] To explain further, as described above, the first buffer mechanism K1 is a mechanism in which the command stop operation pin 84 in the command stop operation mechanism 66 abuts against and pushes the clutch operation arm 69 in the operation unit 65. Also, the second buffer mechanism K2 is a mechanism in which the interlocking stop operation pin 120 in the interlocking stop operation mechanism 109 abuts against and pushes the clutch operation arm 69 in the operation unit 65.

[0068] When a switching operation is performed by the interlocking stop operating mechanism 109, the first buffer mechanism K1 separates the command stop operating mechanism 66 from the clutch operating arm 69 as shown in Fig. 8, so as not to transmit the operating force of the command stop operating mechanism 109 to the command stop operating mechanism 66. Furthermore, when a switching operation is performed by the command stop operating mechanism 66, the second buffer mechanism K2 separates the interlocking stop operating mechanism 109 from the clutch operating arm 69 as shown in Fig. 7, so as not to transmit the operating force of the command stop operating mechanism 66 to the interlocking stop operating mechanism 109.

[0069] The operating unit 65 is configured to switch the feed chain clutch 49 to a disengaged state by rotating the clutch operating arm 69 in a predetermined direction (leftward in FIG. 6). When the command stop operating pin 84 abuts against the clutch operating arm 69 and pushes it to rotate in the predetermined direction, the interlock stop operating pin 120 moves away from the clutch operating arm 69, so that no operating force is transmitted to the interlock stop operating pin 120.

[0070] When the interlocking stop operating pin 120 comes into contact with the clutch operating arm 69 and is pushed and moved so as to rotate in a predetermined direction, the command stop operating pin 84 moves away from the clutch operating arm 69, so that no operating force is transmitted to the command stop operating pin 84.

[0071] [Operating mechanism]

[0072] The operating mechanism 73 will now be described. As shown in Figures 3 and 5, the operating mechanism 73 is provided with an electric motor 100 (an example of an actuator), a release operation wire 101 that links the electric motor 100 with the position holding mechanism 71, an interlocking operation wire 112 that links the electric motor 100 with the interlocking stop operation mechanism 109, and a potentiometer 102 that detects the amount of operation of the electric motor 100. The electric motor 100 and the potentiometer 102 are attached to a mounting plate 103 that is supported on the side wall 6A of the threshing device 6.

[0073] The actuation mechanism 73 will now be described in detail with reference to FIGS.

[0074] A drive gear 121 is fixed to the output shaft 100 a of the electric motor 100 .

[0075] A protruding member 121a is provided on the side surface (the left surface in the left-right direction of the machine body, the surface facing the viewer) of the drive gear 121. The protruding member 121a can come into contact with a push-down lever 128, which will be described later. The protruding member 121a is a ball bearing and can rotate freely.

[0076] A swinging member 122 is provided so as to be able to swing freely relative to the output shaft 100a of the electric motor 100. That is, the output shaft 100a, the drive gear 121, and the swinging member 122 can rotate or swing around the same axis X7. The swinging member 122 is disposed on the right side of the drive gear 121 in the left-right direction of the machine body (toward the back of the page).

[0077] The release operation wire 101 is connected to the upper end of the swinging member 122. The biasing member tension spring is connected to the front end of the swinging member 122. The biasing member tension spring biases the swinging member 122 clockwise. The biasing member tension spring is supported by the mounting plate 103.

[0078] The release operation wire 101 includes an inner wire 101a and an outer wire 101b. Both ends of the outer wire 101b are fixed to the machine body. One end of the inner wire 101a is connected to the connecting arm 98. The other end of the inner wire 101a is connected to the upper end of the swinging member 122.

[0079] In this embodiment, clockwise rotation is defined as the clockwise direction when viewed from the right side of the aircraft body in the left-right direction. Clockwise rotation is indicated by an arrow CW in the drawings. Counterclockwise rotation is defined as the counterclockwise direction when viewed from the right side of the aircraft body in the left-right direction. Counterclockwise rotation is indicated by an arrow CCW in the drawings.

[0080] A ratchet mechanism D is provided at the lower end of the swinging member 122. The ratchet mechanism D rotates freely when the drive gear 121 rotates clockwise, and swings the swinging member 122 counterclockwise when the drive gear 121 rotates counterclockwise.

[0081] 11 shows the ratchet mechanism D in detail. The ratchet mechanism D is composed of a shaft portion 124, a ratchet member 125, a torsion spring 126, and a pin 127.

[0082] The shaft portion 124 is a shaft-shaped portion that protrudes to the right from the swinging member 122 .

[0083] The ratchet member 125 is a member that is supported by the shaft portion 124 so as to be able to swing about the axis X8. The ratchet member 125 is biased by a torsion spring 126 in a clockwise direction.

[0084] The pin 127 is a pin-shaped member that protrudes to the right from the swinging member 122.

[0085] The upper part of the ratchet member 125 is fitted into the tooth groove of the drive gear 121. The lower part of the ratchet member 125 is in contact with the pin 127.

[0086] A push-down lever 128 is provided above the drive gear 121. The push-down lever 128 is supported by the mounting plate 103 in a state in which it can swing around an axis X9. A biasing member tension spring is provided to bias the push-down lever 128 counterclockwise.

[0087] The pressing lever 128 comes into contact with the upper surface of the protruding member 121a of the driving gear 121 and presses the protruding member 121a downward.

[0088] The detection member 102a of the potentiometer 102 is in contact with the rear surface of the push-down lever 128. As the drive gear 121 rotates, the protruding member 121a moves, causing the push-down lever 128 to swing. As the push-down lever 128 swings, the detection member 102a moves. The potentiometer 102 detects the amount of swing of the push-down lever 128, thereby detecting the amount of operation of the electric motor 100.

[0089] A driven gear 130 that meshes with the drive gear 121 and rotates in response to the drive gear 121 is provided on the front side of the drive gear 121. The driven gear 130 is supported by the mounting plate 103 in a state that allows it to freely rotate around the axis X10.

[0090] The configuration around the driven gear 130 will be described with reference to Figure 11. A fixed shaft member 131 is provided so as to protrude from the mounting plate 103 to the left.

[0091] The rotating member 132 is supported by the fixed shaft member 131 via a bearing in a state in which it can freely rotate around the axis X10. The rotating member 132 has a cylindrical portion 132a, which is a cylindrical portion, and a protruding portion 132b that protrudes radially outward from the cylindrical portion 132a. An end portion 112a (an example of an operating end) of the inner wire of the interlocking operation wire 112 is connected to the protruding portion 132b.

[0092] A driven gear 130 is provided via a bearing on the outside of a cylindrical portion 132a of the rotating member 132. The driven gear 130 and the rotating member 132 can each freely rotate around the axis X10.

[0093] An operating member 130a is provided on the side (the left side in the left-right direction of the machine body, the surface facing the viewer) of the driven gear 130. The member 130a moves in conjunction with the rotation of the driven gear 130, and comes into contact with the protruding portion 132b to rotate the rotating member 132.

[0094] [Operation of the actuation mechanism] 11-14, the operation of the actuation mechanism 73 will be described. In this embodiment, when the electric motor 100 operates in the forward direction, the output shaft 100a rotates clockwise, and when the electric motor 100 operates in the reverse direction, the output shaft 100a rotates counterclockwise.

[0095] When the electric motor 100 rotates in the forward direction (hereinafter referred to as "first operation"), the operating mechanism 73 pulls the interlocking operation wire 112 and releases the pulling operation.

[0096] The actuation mechanism 73 performs a pulling operation on the release operation wire 101 when the electric motor 100 performs a reverse operation (hereinafter referred to as a "second operation").

[0097] [First action] The operation of the operating mechanism 73 when the electric motor 100 performs the first operation (forward rotation, clockwise rotation of the output shaft 100a) will be described. The electric motor 100 is controlled by the control device 43 (described later).

[0098] Assume that the operating mechanism 73 is in the state shown in Fig. 11. The pulling operations of the interlocking operation wire 112 and the release operation wire 101 have been released.

[0099] When the electric motor 100 performs the first operation and the output shaft 100a rotates clockwise, the driven gear 130 rotates counterclockwise. The member 130a pushes the protruding portion 132b counterclockwise, causing the rotating member 132 to rotate counterclockwise, and the interlocking operation wire 112 connected to the protruding portion 132b is pulled. This causes the feed chain clutch 49 to switch to the disengaged state.

[0100] When the drive gear 121 and the driven gear 130 rotate to the state shown in Fig. 12, the control device 43 stops the electric motor 100. More specifically, when the output of the potentiometer 102 reaches a value corresponding to the state shown in Fig. 12, the control device 43 stops the electric motor 100.

[0101] The above-described pulling operation of the interlocking operation wire 112 (change from the state in FIG. 11 to the state in FIG. 12) is performed against the biasing forces of the coil spring 63 and the return spring 117. Here, the push-down lever 128, biased counterclockwise by the biasing member tension spring, presses the protruding member 121a downward. This pressing force assists the clockwise rotation of the drive gear 121 and the counterclockwise rotation of the driven gear 130, thereby assisting the pulling operation of the interlocking operation wire 112.

[0102] 12, the driven gear 130 and the rotating member 132 rotate counterclockwise, causing the protruding portion 132b and the end portion 112a of the interlocking operation wire 112 to rotate about the axis X10. When the end portion 112a passes the bottom dead center (the intersection of the straight line Li connecting the fixed outer wire end portion of the interlocking operation wire 112 to the axis X10 and the circular orbit of the end portion 112a), the rotating member 132 rotates due to the pull of the coil spring 63 and the return spring 117, and the end portion 112a and the protruding portion 132b move to the top dead center (the intersection of the straight line Li and the circular orbit of the end portion 112a, the position in FIG. 14). In this way, the pulling operation of the interlocking operation wire 112 is released, the clutch operating arm 69 is returned to the engaged position by the biasing force of the coil spring 63, and the feed chain clutch 49 switches to the transmission state.

[0103] [Ratchet mechanism spinning freely] When the drive gear 121 rotates clockwise due to the first operation of the electric motor 100, the ratchet member 125 is pushed forward by the teeth of the drive gear 121. The ratchet member 125 swings counterclockwise against the biasing force of the tension spring of the biasing member, and enters into the adjacent tooth groove that has approached due to the rotation of the drive gear 121. Because the ratchet mechanism D rotates idly in this way, the swinging member 122 does not swing, and the release operation wire 101 is not pulled. The swinging member 122 remains in the position shown in FIG. 11 with the pin 122a protruding from the mounting plate 103 in contact from behind.

[0104] [Second action, ratchet mechanism operation] The operation of the operating mechanism 73 when the electric motor 100 performs the second operation (reverse operation, counterclockwise rotation of the output shaft 100a) will be described.

[0105] Assume that the operating mechanism 73 is in the state shown in Fig. 11. The pulling operations of the interlocking operation wire 112 and the release operation wire 101 have been released.

[0106] When the electric motor 100 performs the second operation and the output shaft 100a rotates counterclockwise, the teeth of the drive gear 121 push the ratchet member 125 rearward. The ratchet member 125 attempts to oscillate clockwise around the axis X8, but the presence of the pin 127 prevents the ratchet member 125 from oscillating relative to the oscillating member 122. As a result, the oscillating member 122 is pushed by the teeth of the drive gear 121 and oscillates counterclockwise. In other words, when the electric motor 100 performs the second operation, the ratchet mechanism D transmits power downstream to oscillate the oscillating member 122.

[0107] The counterclockwise swing of the swing member 122 pulls the release operation wire 101. The swing member 122 swings to a position where it contacts the pin 122a from above, and remains in the position shown in FIG.

[0108] By pulling the release operation wire 101, the second holding arm 90 swings to the side where the contact restriction state with the first holding arm 89 is released.

[0109] When the pivotal connection point X3 between the first and second holding arms 89 and 90 is positioned rearward of an imaginary line connecting the pivot axis X2 at one end of the first holding arm 89 and the pivot axis X4 at the other end of the second holding arm 90 due to the swing of the second holding arm 90, the first and second holding arms 89 and 90 bend rearward, allowing the horizontal link 74 to slide rearward. Because the horizontal link 74 is constantly subjected to a force by the biasing force of the breaking coil spring 70 in a direction that moves it rearward, even if the pivotal connection point X3 moves rearward even slightly. As a result, the positional holding by the position holding mechanism 71 is released.

[0110] When the position holding mechanism 71 is released from position holding, the second pressing arm 81, i.e., the command stop operation pin 84, swings in a direction that presses the clutch operation arm 69. As a result, the shifter member 68 rotates to shift the driven shift member 60 and switch the feed chain clutch 49 to the disengaged state.

[0111] The driven-side shift member 60 is switched to the disconnected state, and is pressed against the braking mechanism 64 by the biasing force of the disconnecting coil spring 70, thereby applying a braking force. Rotation of the feed chain 15 due to inertial force can be suppressed, and the feed chain 15 can be stopped quickly.

[0112] When the feed chain clutch 49 is stopped by the command stop operation mechanism 66 in this way, the stopped state is maintained until the operator manually returns the position holding mechanism 71 to the position holding state.

[0113] The control device 43 causes the electric motor 100 to perform the second operation (reverse operation), and then causes the electric motor 100 to perform the first operation (forward rotation operation) to return the electric motor 100 to its original state (the state before the second operation). During the first operation, the ratchet mechanism D rotates idly, so the swinging member 122 does not move.

[0114] After the position holding mechanism 71 is operated to return to the position holding state, the first holding arm 89 and the second holding arm 90 are bent forward and returned to a swinging state by the biasing force of the spring 94. Accordingly, the release operation wire 101 and the swing member 122 are returned to a state in which the pulling operation is released (FIGS. 6 and 11).

[0115] As shown in Figure 6, the release operation wire 101 is arranged parallel to the horizontal link 74 in a plan view, and the transmission belt 51, which serves as an endless rotating body that transmits power to the drive shaft 50, is passed up and down using the space between the horizontal link 74 and the release operation wire 101.

[0116] [Control configuration] The configuration relating to the control of the head-feeding combine harvester of this embodiment will be described with reference to FIG.

[0117] The driving unit 5 is provided with a reaping lifting lever 5a that commands the raising and lowering of the reaping unit 3. In response to an operation received by the reaping lifting lever 5a, the control device 43 activates the lifting cylinder 3a to raise or lower the reaping unit 3.

[0118] A clutch motor 140 is provided to operate the reaping clutch 3b and the threshing clutch 6a. The clutch motor 140 may include two motors, one for operating the reaping clutch 3b and the other for operating the threshing clutch 6a.

[0119] When the reaping unit 3 rises to a preset height, the control device 43 causes the electric motor 100 to perform the first operation (forward rotation operation) and switches the feed chain clutch 49 to the disconnected state. The control device 43 also operates the clutch motor 140 to switch the reaping clutch 3b and the threshing clutch 6a to a disengaged state at a predetermined timing.

[0120] Furthermore, when the reaping unit 3 descends to a preset height, the control device 43 causes the electric motor 100 to perform a second operation (reverse operation) and switches the feed chain clutch 49 to a transmission state. The control device 43 also operates the clutch motor 140 to switch the reaping clutch 3b and the threshing clutch 6a to an on state at a predetermined timing.

[0121] As shown in Figure 1, a stop switch 108 that can be manually pressed from the outside of the machine body is provided on the exterior cover 23 of the threshing device 6 near the conveying start end of the feed chain 15. In other words, the stop switch 108 is located on the left side of the machine body.

[0122] When the operator operates the stop switch 108 while the feed chain 15 is rotating and the threshing device 6 is operating, the control device 43 causes the electric motor 100 to perform the second operation (reverse operation) to switch the feed chain clutch 49 to the disconnected state, and issues control information to the engine control unit 43a to stop the operation of the engine 9. The engine control unit 43a stops the operation of the engine 9 by, for example, operating a fuel shutoff valve provided in the fuel supply line to stop the supply of fuel to the engine 9, or by other processing.

[0123] When a predetermined time has elapsed since the second action, the control device 43 executes the first action to return the electric motor 100 to the state it was in before the second action was executed.

[0124] In this way, the control device 43 causes the electric motor 100 to perform a first operation (forward rotation operation) in response to operation of the reaping lift lever 5a (an example of a first operating tool), and causes the electric motor 100 to perform a second operation (reverse rotation operation) in response to operation of the stop switch 108 (an example of a second operating tool). The reaping lift lever 5a (first operating tool) is disposed in the driver's section 5 on which the operator sits. The stop switch 108 (second operating tool) is disposed on the left side of the machine body.

[0125] The head-feeding combine harvester of this embodiment includes an electric motor 100 (an example of an actuator), a first mechanism A, and a second mechanism B.

[0126] The first mechanism A is actuated by the first operation of the electric motor 100 to switch the feed chain clutch 49 between a transmission state and a disconnection state.

[0127] The first mechanism A includes an interlocking operation wire 112 (an example of an operation wire) that transmits an operating force to the feed chain clutch 49, a return spring 117 (an example of a biasing member) that biases the operation wire toward the feed chain clutch, a member 130a (an example of a first member) that moves in conjunction with the first operation (forward rotation operation) of the electric motor 100, and a rotating member 132 (an example of a second member) to which the operating end of the interlocking operation wire 112 is connected and which is pushed by the member 130a to rotate and move.

[0128] The member 130a (first member) rotates around the axis X10, which is the same as the axis of rotation of the rotating member 132 (second member).

[0129] More specifically, the first mechanism A includes a drive gear 121 , a driven gear 130 , a rotating member 132 , an interlocking operation wire 112 , and an interlocking stop operation mechanism 109 .

[0130] The second mechanism B is actuated by a second operation of the electric motor 100 that is different from the first operation, and switches the feed chain clutch 49 from the transmission state to the disengagement state.

[0131] The second mechanism includes a ratchet mechanism D that rotates freely during a first operation (forward rotation operation) and transmits power downstream during a second operation (reverse rotation operation).

[0132] The second mechanism includes a command stop operating pin 84 (an example of an operating member) that operates the feed chain clutch 49, a cut-off coil spring 70 (an example of a biasing mechanism) that biases the command stop operating pin 84 in a predetermined direction, and a position holding mechanism 71 that holds the command stop operating pin 84 in a predetermined position and releases the hold on the command stop operating pin 84 in response to the second operation (reverse operation) of the electric motor 100.

[0133] More specifically, the second mechanism B includes a drive gear 121, a ratchet mechanism D, a swinging member 122, a release operation wire 101, and a command stop operation mechanism 66.

[0134] In the head-feeding combine harvester of this embodiment, one electric motor 100 can operate both the first mechanism A and the second mechanism B.

[0135] As shown in Figure 3, the first mechanism A and the second mechanism B are arranged on the left side of the threshing device 6. The electric motor 100 is arranged below the feed chain 15 on the left side of the threshing device 6. In other words, all mechanisms required to turn the feed chain clutch 49 on and off (the electric motor 100, the first mechanism A, and the second mechanism B) are arranged on the left side of the threshing device 6.

[0136] In the self-feeding combine of this embodiment configured in this manner, the feed chain clutch 49, the harvesting clutch 3b, and the threshing clutch 6a are turned on and off by actuators (electric motor 100, clutch motor 140) controlled by the control device 43, making it easy to appropriately control the timing of operation / stop of the feed chain 15, the harvesting section 3, and the threshing device 6.

[0137] Furthermore, the first mechanism A quickly engages the feed chain clutch 49 using the mechanism described above. That is, when the electric motor 100 performs the first operation from the state shown in FIG. 12 in which the interlocking operation wire 112 is pulled, the protruding portion 132b rotates around the axis X10. When the end 112a of the interlocking operation wire 112 passes the bottom dead center, the end 112a is pulled upward by the coil spring 63 and the return spring 117, and the pulling operation of the interlocking operation wire 112 is released. This quickly engages the feed chain clutch 49, making it possible to prevent malfunctions such as loose meshing of the feed chain clutch 49.

[0138] The second mechanism B disengages the feed chain clutch 49 by releasing the position holding mechanism 71, causing the command stop operation pin 84 of the second pressing arm 81, which is biased by the disconnecting coil spring 70, to operate the clutch operation arm 69. This allows the clutch operation arm 69 to be operated quickly, and the feed chain clutch 49 can be quickly switched to the disconnected state.

[0139] [Another embodiment] The present invention is not limited to the configurations exemplified in the above-described embodiments. Other representative embodiments of the present invention will be described below.

[0140] (1) In the above embodiment, forward rotation of the electric motor 100 is the first operation, and the first mechanism A is actuated by the forward rotation. Reverse rotation of the electric motor 100 is the second operation, and the second mechanism B is actuated by the reverse rotation. The opposite configuration is also possible. That is, the actuating mechanism 73 may be configured so that reverse rotation of the electric motor 100 is the first operation, and the first mechanism A is actuated by the reverse rotation. The actuating mechanism 73 may be configured so that forward rotation of the electric motor 100 is the second operation, and the second mechanism B is actuated by the forward rotation.

[0141] (2) The push lever 128 may be omitted.

[0142] (3) The rotational position of the electric motor 100 may be controlled by other configurations (such as a rotational position sensor or a stepping motor) instead of the potentiometer 102.

[0143] (4) In the above-described embodiment, the reaping lifting lever 5a corresponds to the first operating tool, and the stop switch 108 corresponds to the second operating tool. The first operating tool and the second operating tool may be operating tools of other types.

[0144] (5) In the above-described embodiment, the electric motor 100 corresponds to the actuator. The actuator may be in another form, such as a hydraulic motor. [Industrial Applicability]

[0145] The present invention can be applied to a combine harvester that is equipped with a feed chain that transports harvested stalks to a threshing device and is configured so that power to the feed chain can be interrupted by a feed chain clutch. [Explanation of symbols]

[0146] 5: Driving section 5a: Mowing lift lever (first operating tool) 6: Threshing equipment 15: Feed chain 43: Control device 49: Feed chain clutch 65: Operation section 70: Cut-off coil spring (biasing mechanism) 71:Position holding mechanism 84: Command stop operation pin (operation member) 100: Electric motor (actuator) 108: Stop switch (second operating tool) 112: Interlocking operation wire (operation wire) 112a: End (operating end) 117: Return spring (biasing member) 130a: Component (first component) 132: Rotating member (second member) A: 1st mechanism B:Second mechanism D: Ratchet mechanism X10: Axial center

Claims

1. threshing equipment; a feed chain for transporting the harvested stalks to the threshing device; a feed chain clutch switchable between a transmission state in which power is transmitted to the feed chain and a disconnection state in which power is not transmitted to the feed chain; An actuator; a first mechanism that is actuated by a first operation of the actuator to switch the feed chain clutch between the transmitted state and the disengaged state; a second mechanism that is actuated by a second operation of the actuator that is different from the first operation, and switches the feed chain clutch from the transmitted state to the disengaged state.

2. the first operation is one of a forward rotation operation and a reverse rotation operation of the actuator, The combine harvester according to claim 1 , wherein the second operation is the other of the forward rotation operation and the reverse rotation operation of the actuator.

3. The first mechanism is an operating wire that transmits an operating force to the feed chain clutch; a biasing member that biases the operating wire toward the feed chain clutch; a first member that moves in response to the first operation of the actuator; The combine harvester according to claim 2 , further comprising: a second member to which an operating end of the operating wire is connected and which is pushed by the first member to rotate and move.

4. A threshing device; a feed chain for transporting the harvested stalks to the threshing device; a feed chain clutch switchable between a transmission state in which power is transmitted to the feed chain and a disconnection state in which power is not transmitted to the feed chain; An actuator; a first mechanism that is actuated by a first operation of the actuator to switch the feed chain clutch between the transmitted state and the disengaged state; a second mechanism that is actuated by a second operation of the actuator that is different from the first operation, and that switches the feed chain clutch from the transmitted state to the disengaged state, the first operation is one of a forward rotation operation and a reverse rotation operation of the actuator, the second operation is the other of the forward rotation operation and the reverse rotation operation of the actuator, The first mechanism is an operating wire that transmits an operating force to the feed chain clutch; a biasing member that biases the operating wire toward the feed chain clutch; a first member that moves in response to the first operation of the actuator; a second member to which an operating end of the operating wire is connected and which is pushed by the first member to rotate; A combine harvester in which the first member rotates about the same axis as the axis of rotation of the second member.

5. A threshing device; a feed chain for transporting the harvested stalks to the threshing device; a feed chain clutch switchable between a transmission state in which power is transmitted to the feed chain and a disconnection state in which power is not transmitted to the feed chain; An actuator; a first mechanism that is actuated by a first operation of the actuator to switch the feed chain clutch between the transmitted state and the disengaged state; a second mechanism that is actuated by a second operation of the actuator that is different from the first operation, and that switches the feed chain clutch from the transmitted state to the disengaged state, The second mechanism includes a ratchet mechanism that rotates freely during the first operation and transmits power downstream during the second operation.

6. The second mechanism is an operating member for operating the feed chain clutch; a biasing mechanism that biases the operating member in a predetermined direction; The combine harvester according to claim 5 , further comprising: a position holding mechanism that holds the operating member at a predetermined position and releases the holding of the operating member in response to the second operation of the actuator.

7. 2. The combine according to claim 1, wherein the first mechanism and the second mechanism are disposed on the left side of the threshing device.

8. The combine according to claim 7, wherein the actuator is disposed below the feed chain on the left side of the threshing device.

9. A first operating tool; A second operating tool; a control device for controlling the actuator, A combine harvester as described in any one of claims 1 to 8, wherein the control device causes the actuator to perform the first operation in response to operation of the first operating device, and causes the actuator to perform the second operation in response to operation of the second operating device.

10. The combine harvester according to claim 9, wherein the first operating tool is disposed in a driver's section on which an operator sits.

11. The combine harvester according to claim 10, wherein the second operating tool is disposed on the left side of the body.

Images