JP2008199909A - Clutch operation device of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch operation device of a combine harvester, which can obtain a state in which a threshing clutch and a reaping clutch are engaged and a state in which the threshing clutch is engaged and the reaping clutch is disengaged, by a small electric motor in a simple structure. <P>SOLUTION: A threshing clutch-operating member 31 connected to a threshing clutch-operating portion 14b through a threshing clutch connection mechanism 32, and a reaping clutch-operating member 33 connected to a reaping clutch-operating portion 17b through a reaping clutch connection mechanism 34 are integrally rotated by an electric motor 22. When the threshing clutch-operating member 31 and the reaping clutch-operating member 33 are rotated from a disengaging region in the normal rotation direction X to position the threshing clutch-operating member 31 at a place in front of a dead point D, the threshing clutch-operating member 31 is positioned in an engaging region, and the reaping clutch-operating member 33 is positioned in the disengaging region. When the threshing clutch-operating member 31 and the reaping clutch-operating member 33 are further rotated in the normal rotation direction to pass the threshing clutch-operating member 31 through the dead point D, both the threshing clutch-operating member 31 and the reaping clutch-operating member 33 are positioned in the engaging region. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a combine clutch operating device configured to switch between a threshing clutch and a mowing clutch by the same electric motor.

Conventionally, for example, the one disclosed in Patent Document 1 has been developed as the clutch operating device.
A clutch operating device disclosed in Patent Document 1 includes a clutch operating unit that is linked to a tension arm of a threshing clutch via an operation cable and an interlocking link, a threshing clutch cam that operates the clutch operating unit, and a reaping clutch. A clutch operating unit that is linked to the tension arm via an operation cable and an interlocking link, a mowing clutch cam that operates the clutch operating unit, an electric clutch motor that operates the threshing clutch cam and the mowing clutch cam It has.
A rotating boss portion that supports the threshing clutch cam and the mowing clutch cam so as to be integrally rotatable is provided with a gear portion so as to be integrally rotatable. An output gear meshed with the gear portion is provided in the electric clutch motor, and the electric clutch motor rotates the threshing clutch cam and the mowing clutch cam integrally to operate the non-working position, the pillow handling position, and the working position. Switch to.

  When the threshing clutch cam and the mowing clutch cam are switched to the non-working position, the threshing clutch cam removes the portion of the outer peripheral surface of the threshing clutch cam that has been removed from the arc-shaped cam surface. The threshing clutch is operated in the disengaged state by causing the clutch operating part to loosen the operating cable and operating it. At this time, the cutting clutch cam is separated from the cam follower of the clutch operating portion, and the clutch operating portion is operated to loosen the operating cable to operate the cutting clutch in the disengaged state.

  When the threshing clutch cam and the reaping clutch cam are switched to the pillow handling position, the threshing clutch cam contacts the cam follower of the clutch operating portion with the arc-shaped cam surface of the outer periphery of the threshing clutch cam. The operation unit is operated to pull the operation cable to operate the threshing clutch in the engaged state. At this time, the cutting clutch cam is configured such that a portion of the outer peripheral surface of the cutting clutch cam that is separated from the arc-shaped cam surface corresponds to the cam follower of the clutch operating unit, and the operating cable is loosened and operated by the clutch operating unit. Maintain the cut state.

  When the threshing clutch cam and the mowing clutch cam are switched to the working position, the threshing clutch cam makes its arc-shaped cam surface contact the cam follower of the clutch operating part, and is operated by the clutch operating part. Pull the cable to operate the threshing clutch. At this time, the cutting clutch cam causes the arc-shaped cam surface thereof to correspond to the cam follower of the clutch operating portion, and pulls the operation cable to the clutch operating portion to operate the cutting clutch in the engaged state.

  This type of clutch operating device has a normal working state in which the mowing unit and the threshing device are driven to perform the mowing operation, and a special threshing device that is driven while the mowing unit is stopped to perform the pillow handling operation. It is possible to show the working state. Furthermore, the operation can be easily performed by simply operating the switch of the electric motor.

JP 2002-262463 A (paragraphs [0023]-[0033], FIGS. 3-7, FIG. 11)

In the case of adopting the above-described conventional technology, even if the electric motor can be completed with a small motor having an output as small as possible, it is disadvantageous in terms of structure.
In other words, the special work state appears by operating the threshing clutch in the engaged state and operating the mowing clutch in the disengaged state, and the normal work state appears by operating the threshing clutch and the mowing clutch in the engaged state. Is done. Thereby, in order to switch from the special work state to the normal work state, it is necessary to perform an operation of switching the mowing clutch from the cut state to the engaged state while maintaining the threshing clutch in the engaged state. The threshing clutch interlocking mechanism that interlocks the threshing clutch operating part for switching the threshing clutch and the threshing clutch operating body operated by the electric motor is provided with an interlocking spring, and is operated to switch from the special work state to the normal work state. The electric motor can be configured by switching the mowing clutch to the clutch engaged state while elastically deforming the interlocking spring and maintaining the threshing clutch in the engaged state. In this case, the restoring force provided by the elastic deformation of the interlocking spring is applied to the electric motor as a clutch operating load. On the other hand, if the above-described conventional technology is adopted and the cam surface provided so that the clutch operation cam acts on the cam follower of the clutch operation portion is formed into an arc shape centering on the rotation axis of the clutch operation cam, an electric motor When switching the mowing clutch to the engaged state, even if the clutch operating cam is rotated, the clutch operating portion is not swung because of the arc shape of the cam surface, as in the case where the interlocking spring is used. No special clutch operating load is applied to maintain the threshing clutch in the electric motor.

  However, it is necessary to provide a threshing clutch cam and a mowing clutch cam, and the structure is complicated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a combined clutch operating device in which an electric motor can be reduced in size and can be obtained with a simple structure.

This 1st invention is the clutch operating device of the combine comprised so that a threshing clutch and a mowing clutch may be switched by the same electric motor,
The threshing clutch operating unit linked to the threshing clutch operating unit for switching the threshing clutch via the threshing clutch interlocking mechanism, and the chopping clutch operating unit for switching to the chopping clutch linked to the threshing clutch operating mechanism via the cutting clutch interlocking mechanism A mowing clutch operating body is provided so as to be freely rotatable in the forward rotation direction and the reverse rotation direction integrally by the electric motor,
When the electric motor rotates the threshing clutch operating body and the reaping clutch operating body in the forward rotation direction from the cutting area, and the threshing clutch operating body is positioned before the dead point, the threshing clutch operating body is positioned in the entering area. The threshing clutch interlocking mechanism operates the threshing clutch operating part to the clutched attitude, and the reaping clutch operating body is located in the cutting area, and the reaping clutch interlocking mechanism operates to maintain the cutting clutch operating part in the clutch disengaging position, When the electric motor further rotates the threshing clutch operating body and the mowing clutch operating body in the forward rotation direction, and the threshing clutch operating body exceeds the dead point, the threshing clutch operating body is located in the above-mentioned range and interlocked with the threshing clutch. The mechanism maintains the threshing clutch operating part in the clutch-engaged position, and the mowing clutch operating body is located in the entering area, Mechanism have configured with the clutch interlock mechanism and the threshing clutch interlock mechanism so as to operate the clutch operation portion clutch engaging position cutting.

  According to the configuration of the first aspect of the invention, when the electric motor is driven, the electric motor rotates the threshing clutch operating body and the mowing clutch operating body integrally in the forward rotation direction or in the reverse rotation direction. Or When the threshing clutch operating body and the mowing clutch operating body are rotated in the normal rotation direction from the cutting area, and the threshing clutch operating body is positioned before the dead point, the threshing clutch operating body is positioned in the entering area and the threshing clutch interlocking mechanism Operates the threshing clutch operating part into the entering posture, and the threshing clutch enters the engaged state. At this time, the cutting clutch operating body is positioned in the cutting area, and the cutting clutch interlocking mechanism operates to maintain the cutting clutch operating portion in the cutting posture, and the cutting clutch is in the disconnected state. When the threshing clutch operating body and the clutch operating body are further rotated in the forward rotation direction and the threshing clutch operating body exceeds the dead center, the threshing clutch operating body is located in the area and the threshing clutch interlocking mechanism is operated as the threshing clutch operating unit. The threshing clutch is in the engaged state by maintaining the in the entering posture. At this time, the mowing clutch operating body is located in the in-range, and the mowing clutch interlocking mechanism operates the mowing clutch operating portion to the in-position so that the mowing clutch is engaged.

Further, according to the configuration of the first invention, the electric motor is used to maintain the threshing clutch in the engaged state when the harvesting clutch operating body is operated from the cut region to the engaged region and the harvesting clutch switches from the cut state to the engaged state. The threshing clutch can be maintained in the engaged state so as to minimize the load applied to.
That is, when the reaping clutch operating body is operated from the cutting area to the entering area, the threshing clutch operating body is operated beyond the dead point from the position before the dead center and maintained in the entering area. Then, the operation amount of the threshing clutch operation part generated by the movement of the operated threshing clutch operating body is minimized. As a result, when the electric motor operates the reaping clutch operating body from the cutting area to the entering area, the load applied to the electric motor due to the threshing clutch operating section interlocking with the threshing clutch operating body rotating together with the reaping clutch operating body It becomes small because the operation amount of the clutch operation unit is small.

  Therefore, the normal operation state in which the mowing unit and the threshing device are driven and the special operation state in which the threshing device is driven while stopping the mowing unit can be easily displayed by simply operating the switch of the electric motor. However, it is only necessary to adopt a simple structure that allows the threshing clutch operating body and the mowing clutch operating body to be rotated by an electric motor, and it is possible to employ an electric motor with a relatively small output. Can be obtained inexpensively.

According to a second aspect of the present invention, in the configuration of the first aspect of the invention, the reaping clutch interlocking mechanism includes an operating body side interlocking member coupled to the mowing clutch operating body and a clutch side interlocking member coupled to the mowing clutch operating portion. An interchangeable portion with interchangeability that can be switched between an interchangeable state for relative movement and an interchangeable release state for integrally moving the operating body side interlocking member and the clutch side interlocking member;
The interlocking interlocking unit is configured so that the mowing clutch operating unit is engaged with the clutch after the threshing clutch operating unit is switched to the clutched attitude in accordance with the rotation operation of the mowing clutch operating body in the forward rotation direction by the electric motor. So as to switch from the accommodation state to the accommodation release state.

  According to the configuration of the second aspect of the invention, when the threshing clutch operating body is operated from the cutting area to the entering area and the threshing clutch operating part is operated to the entering position, the interchangeable interlocking part is in an accommodative state, and the cutting clutch operating body is Moves relative to the mowing clutch operating section. As a result, the electric motor operates the threshing clutch by rotating the threshing clutch operating body in a state of a small load that does not receive a load from the mowing clutch operation unit.

  Therefore, it can be obtained at a lower cost by employing a smaller output electric motor.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall side view of a combine according to an embodiment of the present invention. As shown in this figure, the combine according to the present embodiment is self-propelled by a pair of left and right crawler type traveling devices 1, 1 and has a driving unit equipped with a driver seat 2, and this traveling A cutting part 4 connected to the front part of the machine body frame 3 of the machine body, a threshing device 5 and a grain tank 6 provided side by side in the lateral direction of the traveling machine body on the rear side of the machine frame 3 are provided.

  This combine harvests rice, wheat and the like. That is, the cutting unit 4 is configured such that the cutting unit frame 4 a is swinged up and down with respect to the machine body frame 3 by the hydraulic cylinder 7, so that a plurality of the cutting unit 4 are arranged in the cutting portion lateral direction at the front end of the cutting unit 4. The weeding tool 4b moves up and down into a descending work state in which the weeding tool 4b is lowered near the ground, and an ascending non-working state in which the weeding tool 4b is lifted from the ground. When the cutting unit 4 is in the descending work state and the traveling vehicle is traveling, the cutting unit 4 transplants the adjacent planting line by the weeding tool 4b corresponding to the planted cereals located on the plurality of planting lines to be harvested. Weed the cereal grains and weed and process the planted grains from each weeding tool 4a by the corresponding elevating device 4c and mowed by one clipper-shaped mowing device 4d. The harvested cereal meal is transported toward the rear of the traveling machine body by the transport device 4e and supplied to the start end of the threshing feed chain 5a of the threshing device 5. The threshing device 5 feeds the tip side to a handling room (not shown) while holding the stock side of the harvested cereal by the threshing feed chain 5a and transporting it backward in the traveling machine body, and rotates the harvested cereal. Threshing treatment is performed by a barrel (not shown). The grain tank 6 collects and stores the threshed grains conveyed from the threshing device 5. The grain tank 6 includes an auger-shaped discharge device 8 that discharges stored threshing grains.

  The traveling machine body includes an engine 10 provided below the driver seat 2. FIG. 2 is a schematic diagram of a transmission device that transmits the driving force of the engine 10. As shown in this figure, the transmission device transmits the output from the output shaft 10 a of the engine 10 to the input shaft 5 b of the threshing device 5 via the threshing clutch 14. The transmission device transmits the output from the output shaft 10a of the engine 10 to the input shaft 13 of the traveling mission 12 via the main clutch 11 formed of a belt tension clutch, and the driving force of the input shaft 13 is cut and the auxiliary transmission is cut. 15, and the output from the output shaft 16 of the mowing subtransmission 15 is transmitted to the input shaft 4 f of the mowing unit 4 via the mowing clutch 17.

  The traveling mission 12 includes a hydrostatic continuously variable transmission 18 (hereinafter abbreviated as HST 18) in which the input shaft 13 serves as a pump shaft, and outputs from the HST 18 in two stages of high speed and low speed. And an auxiliary transmission 19 for shifting. The auxiliary transmission 19 transmits the output to the pair of left and right crawler traveling devices 1, 1. The auxiliary transmission 19 and the cutting auxiliary transmission 15 are located inside the same mission case 20.

  As shown in FIGS. 2 and 5, the threshing clutch 14 includes a transmission belt 14 a wound around an output shaft 10 a of the engine 10 and an input shaft 5 b of the threshing device 5, and a tension arm 14 b. is there. The mowing clutch 17 includes a transmission belt 17a wound around the output shaft 16 of the mowing subtransmission 15 and the input shaft 4f of the mowing portion 4, and a tension arm 17b.

  The threshing clutch 14 and the mowing clutch 17 are configured such that when the tension arms 14b and 17b are swung to a clutch engagement posture (hereinafter referred to as an engagement posture), the tension arms 14b and 17b are moved to their free ends. When the transmission belts 14a and 17a are pressed to the tensioned state by the tension ring bodies 14c and 17c provided, the tensioned belts 14c and 17c are switched to the engaged state, and the tension arms 14b and 17b are switched to the clutch disengagement posture (hereinafter referred to as the disengagement posture). When the swinging operation is performed, the tension arms 14b and 17b are switched to the cut state by releasing the tensioning operation of the transmission belts 14a and 17a. The threshing clutch 14 and the mowing clutch 17 are belt tension clutches. The tension arm 14b of the threshing clutch 14 is swingably supported by the input shaft 5b of the threshing device 5. The tension arm 17b of the mowing clutch 17 is swingably supported on the output shaft 16 of the mowing subtransmission 15. The tension arm 17b of the mowing clutch 17 is received and supported in a cutting posture by a stopper 21 (see FIG. 5).

  The threshing clutch 14 and the mowing clutch 17 are operated by a clutch operating device C having a speed change lever 24 and a work selection means 25 disposed on an operation panel 35 located on the side of the driver's seat 2 of the driver. Is done. The clutch operating device C includes a clutch switching unit 23 having an electric motor 22 and a control unit 26 having the shift lever 24 and the work selection means 25.

  FIG. 5 is a side view of the clutch switching unit 23. As shown in the figure, the clutch switching portion 23 includes the electric motor 22 and an arm rotatably supported by a boss portion 30a (see FIG. 10) provided in a support frame 30 to which the electric motor 22 is attached. Shaped threshing clutch operating body 31, a threshing clutch interlocking mechanism 32 for interlocking the threshing clutch operating body 31 with the tension arm 14b of the threshing clutch 14, and an arm-shaped trimming rotatably supported by the boss portion 30a. A clutch operating body 33 and a cutting clutch interlocking mechanism 34 that interlocks the cutting clutch operating body 33 with the tension arm 17 b of the cutting clutch 17 are provided. The support frame 30 is disposed below the operation panel 35 and is attached to a driving unit frame (not shown).

  As shown in FIG. 5, the electric motor 22 includes an electric motor main body 22a, a deceleration output case 22b connected to the electric motor main body 22a, and an output gear 22c rotatably supported by the deceleration output case 22b. I have. The deceleration output case 22b transmits the output of the electric motor main body 22a to the output gear 22c by a gear reduction mechanism (not shown) in the case.

  As shown in FIGS. 5 and 10, the threshing clutch operating body 31 and the mowing clutch operating body 33 are connected to a single rotating support shaft 37 rotatably supported by the boss portion 30 a so as to be integrally rotatable. . The rotation support shaft 37 includes a sector gear 38 provided at one end of the rotation support shaft 37 so as to be integrally rotatable. The sector gear 38 meshes with the output gear 22c, and is rotationally driven in the normal rotation direction by the electric motor 22 to rotate the rotation support shaft 37, whereby the threshing clutch operating body 31 and the reaping clutch operating body 33 are operated. Are rotated in the forward rotation direction integrally around the axis of the rotation support shaft 37. The sector gear 38 is rotationally driven in the reverse rotation direction by the electric motor 22 to rotate the rotation support shaft 37, thereby causing the threshing clutch operation body 31 and the mowing clutch operation body 33 to rotate around the axis of the rotation support shaft 37. To rotate in the reverse direction.

  As shown in FIG. 5, the threshing clutch interlocking mechanism 32 is integrally formed with an interlocking rod 32a having one end connected to the free end portion of the threshing clutch operating body 31, and the other end of the interlocking rod 32a integrally formed with the tension arm 14a. And an interlocking spring 32b connected to the operating arm portion 14d. The interlocking bar 32a and the threshing clutch operating body 31 are connected to each other via a connecting pin 31a so as to be relatively rotatable.

  As shown in FIG. 5, the mowing clutch interlocking mechanism 34 has an interlocking rod 34a whose one end is coupled to the free end of the mowing clutch operating body 33, and the other end of the interlocking rod 34a is coupled to the tension arm 17b. And an interlocking spring 34b. The interlocking rod 34a and the cutting clutch operating body 33 are connected to each other through a connecting pin 33a so as to be relatively rotatable.

  The mowing clutch interlocking mechanism 34 includes an interlocking interlocking part 39 provided across the interlocking spring 34b and the tension arm 17b. This interchangeable interlocking portion 39 is formed in a hook-shaped end portion 34c of the interlocking spring 34b and a long groove 34d provided in the interlocking spring 34b, and is slidably engaged in the long groove 34d and is attached to the tension arm 17b. An interlocking pin 40 provided is provided. According to the operating position of the mowing clutch operating body 33, the interlocking interlocking portion 39 has an accommodation state in which the interlocking pin 40 moves inside the long groove 34d and relatively moves the interlocking spring 34b and the interlocking pin 40, and the interlocking pin 40 is a long groove. By switching to the end of the inner portion and coming into contact with the interlocking spring 34b, the interchangeable spring 34b and the interlocking pin 40 are switched to the interchangeable release state in which they are moved together.

  FIG. 8 is an explanatory diagram showing an operation range between the threshing clutch operating body 31 and the reaping clutch operating body 33. FIG. 5 is a side view of the clutch switching unit 23 in a state in which the threshing clutch 14 and the mowing clutch 17 are turned off. FIG. 6 is a side view showing a state in which the threshing clutch 14 of the clutch switching unit 23 is turned on and the cutting clutch 17 is turned off. FIG. 7 is a side view showing a state where the threshing clutch 14 and the mowing clutch 17 of the clutch switching unit 23 are engaged and operated.

  As shown in these figures, the threshing clutch operating body 31 and the reaping clutch operating body 33 are integrated with each other around the axis of the rotating support shaft 37 by the electric motor 22 via the sector gear 38 and the rotating support shaft 37. The threshing clutch operating body 31 is rotated into the cutting area 31A and the entering area 31B, and the mowing clutch operating body 33 is moved into the cutting area 33A and the entering area 33B. It is rotated. The entering area 31B of the threshing clutch operating body 31 is in an arrangement state in which the dead center D is located inside the entering area 31B with respect to the dead center D of the threshing clutch operating body 31. The dead point D of the threshing clutch operation body 31 corresponds to the operation position where the pulling operation stroke of the threshing clutch interlocking mechanism 32 by the threshing clutch operation body 31 is the maximum among the operation positions of the threshing clutch operation body 31.

  When the threshing clutch operating body 31 is operated to the cutting area 31A, the threshing clutch interlocking mechanism 32 releases the pulling operation by the threshing clutch operating body 31 and operates the tension arm 14b to the cutting posture. At this time, the cutting clutch operating body 33 is positioned in the cutting area 33A, and the cutting clutch interlocking mechanism 34 releases the pulling operation by the cutting clutch operating body 33 and operates the tension arm 17b to the cutting position.

  When the threshing clutch operating body 31 is rotated in the normal rotation direction from the cutting area 31A, the threshing clutch operating body 31 is positioned at the start end position S of the entering area 31A located in front of the dead point D. Then, the threshing clutch interlocking mechanism 32 operates the tension arm 14b to the entering posture for the pulling operation by the threshing clutch operating body 31. At this time, the cutting clutch operating body 33 is positioned on the terminal side of the cutting area 33A, and the cutting clutch interlocking mechanism 34 operates the tension arm 17b to the cutting posture.

  When the threshing clutch operating body 31 is further rotated in the forward rotation direction, the threshing clutch operating body 31 moves through the entry area 31B, exceeds the dead point D, and is located at the terminal position E of the entry area 31B. The interlocking mechanism 32 keeps the tension arm 14b in the entering posture for the pulling operation by the threshing clutch operating body 31. When the threshing clutch operating body 31 is positioned at the end position E of the entering area 31B, the cutting clutch operating body 33 is positioned in the entering area 33B, and the cutting clutch interlocking mechanism 34 is tensioned for the pulling operation by the cutting clutch operating body 33. The arm 17b is operated to enter the posture. While the threshing clutch operating body 31 is located in the entering area 31B, the threshing clutch interlocking mechanism 32 receives a pulling operation by the threshing clutch operating body 31, and maintains the tension arm 14b in the entering posture.

  When the threshing clutch operating body 31 and the reaping clutch operating body 33 are rotated in the normal rotation direction X from the cutting areas 31A, 33A, the threshing clutch operating body 31 is positioned on the start end side of the cutting area 31A, and the reaping clutch When the operating body 33 is positioned on the start end side of the cut area 33A, the interlocking interlocking portion 39 is in a flexible state, and when the cutting clutch operating body 33 is positioned on the terminal end side of the cutting area 33A, the interlocking interlocking portion 39 is Switch to the incompatible state.

  That is, the interlocking interlocking unit 39 allows the electric motor 22 to move the tensioning clutch 14 to the electric motor 22 even when a load is applied to the electric motor 22 to operate the tension arm 14b of the threshing clutch 14 until the cutting clutch operating body 33 reaches the entry region 33B. A load for operating the tension arm 17b is not applied, and after the tension arm 14b of the threshing clutch 14 is switched to the engaged position, the tension arm 17b of the mowing clutch 17 is switched to the engaged position.

  FIG. 3 is a block diagram of the control unit 26. As shown in this figure, the control unit 26 includes the shift lever 24 and the work selection means 25, and further includes a shift detection means 41 linked to the shift lever 24, and further includes the shift detection means 41. Control means 42 linked to the work selection means 25 and the electric motor 22 is provided. The control means 42 is linked to an operating body position detecting means 43 that is linked to the threshing clutch operating body 31.

  The speed change lever 24 is supported by the neutral position N, the forward range F, and the reverse range R so as to be swingable. The speed change lever 24 is linked to the operation portion of the HST 18 via a link mechanism (not shown) using an interlocking rod or a swing link, and performs a speed change operation on the HST 18 via the link mechanism.

  The shift detection means 41 is constituted by a rotary potentiometer linked to the shift lever 24. The shift detection means 41 detects the operation position of the shift lever 24 and outputs the detection result to the control means 42.

  The work selection means 25 is constituted by a changeover switch that can be switched between an entry position “ON” and a cut position “OFF”. When the operation selection means 25 is switched to the on position “on”, the work selection means 25 outputs an on command to cause the control means 42 to perform the clutch operation. An off command is outputted to the means 42 so as to stop the clutch operation.

  As shown in FIG. 10, the operating body position detecting means 43 is constituted by a rotary potentiometer attached to the support frame 30 in a state interlocked with the rotary support shaft 37. The operating body position detecting means 43 detects the operating position of the threshing clutch operating body 31 based on the rotational position of the rotating support shaft 37 and feeds back the detection result to the control means 42.

  The control means 42 is configured using a microcomputer. FIG. 4 is a flowchart of clutch operation by the control means 42. As shown in this figure, the control means 42 controls the electric motor 22 based on a command from the work selection means 25 and detection results from the shift detection means 41 and the operating body position detection means 43. Then, the clutch switching unit 23 is operated, thereby switching the threshing clutch 14 and the reaping clutch 17 to bring the reaping unit 4 and the threshing device 5 into a driving state or a stopped state corresponding to non-work or work.

  The engine 10 is speed controlled by an engine speed control device G having an accelerator operating tool 60 disposed on the operation panel 35. FIG. 9 is a side view of the engine speed control device G. FIG. 10 is a longitudinal sectional view of the engine speed control device G. As shown in these drawings, the engine speed control device G includes the accelerator operating tool 60 and is mounted on a support shaft 61 that connects the base of the accelerator operating tool 60 to the support frame 30. A friction plate 68, a swing operation body 69 provided on one end side of the rotation support shaft 37, and an operation unit 70 provided on one end portion of the support shaft 61 are provided.

  The accelerator operating tool 60 is supported so as to swing around the axis of the support shaft 61. The accelerator operating tool 60 includes an output arm portion 60a formed integrally with the base portion thereof. The output arm portion 60 a is interlocked with a speed control arm 64 of an accelerator device 63 provided in the engine 10 via a spring 66 and an accelerator cable 62. The friction plate 68 is brought into pressure contact with the base of the accelerator operating tool 60 by tightening with the mounting screw 71 and imparts frictional resistance to the accelerator operating tool 60.

  The swing operating body 69 is connected to an oval shaped portion 37a provided on the rotary support shaft 37 so as to be integrally rotatable by a mounting cylinder portion 69a. In other words, the swing operation body 69 is interlocked with the threshing clutch operation body 31 via the rotary support shaft 37 so as to be integrally swingable.

  The operation unit 70 is configured by a plate body that is configured separately from the accelerator operation tool 60 and the swing operation body 69 and is supported on the support shaft 61 so as to be freely rotatable. Oscillates relative to the accelerator operating tool 60 around the axis of the axis. The operation unit 70 includes a passive unit 70a and a transmission unit 70b formed by a roller 73 attached to the free end of the operation unit 70 via a support shaft 72 so as to freely rotate. The roller 73 is inserted through the long hole 74 so as to move along an arc-shaped long hole 74 provided in the support frame 30.

  The passive portion 70 a abuts against an end 69 b of the swing operation body 69 and receives an operation force from the swing operation body 69 to swing the operation portion 70 around the axis of the support shaft 61. The transmission part 70b abuts on the output arm part 60a of the accelerator operation tool 60, and allows the operation part 70 to push and swing in the acceleration direction of the accelerator operation tool 60.

As shown in FIG. 11, the operation portion 70 includes a spring receiving portion 70c formed integrally with the base portion thereof. The operating portion 70 is oscillated and biased to a standby position T shown in FIGS. 12C and 12B by a winding spring 75 acting on the spring receiving portion 70c.
That is, as shown in FIGS. 9 and 10, the winding spring 75 is attached to the support shaft 61. A pair of end portions 75 a and 75 a of the winding spring 75 are arranged so as to sandwich the spring receiving portion 70 c and a spring stopper 76 provided on the support frame 30. FIGS. 12C and 12D show a state in which the operation unit 70 is located at the standby position T. FIG. FIG. 12B shows a state where the operation unit 70 is swung from the standby position T in the action direction a1. As shown in these drawings, when the operating portion 70 is swung in the acting direction a1 from the standby position T, the spring receiving portion 70c is swung together with the operating portion 70 and one of the winding springs 75 is moved. The end portion 75a is pressed. At this time, the other end 75 a of the winding spring 75 is received and supported by the spring stopper 76. When the operating portion 70 is swung in the release direction b1 from the standby position T, the spring receiving portion 70c swings together with the operating portion 70 and presses the other end 75a of the winding spring 75. Go. At this time, one end 75a of the winding spring 75 is received and supported by the spring stopper 70c. As a result, the winding spring 75 is elastically deformed with the rotation of the operation unit 70 even when the operation unit 70 is swung in either the acting direction a1 or the release direction b1, and waits for the operation unit 70. A swinging bias is applied to return to the position T.

That is, the engine speed control device G is operated by the operation of the accelerator operation tool 60 by human operation or by the operation of the accelerator operation tool 60 by the clutch operation device C to adjust the rotation speed of the engine 10.
That is, when the accelerator operating tool 60 is manually operated, the output arm 60a swings around the axis of the support shaft 61, and the accelerator cable 62 is pulled or loosened. The pulled accelerator cable 62 swings the speed control arm 64 against its restoring force, and speeds up the engine 10 so that the rotational speed increases. The loosely operated accelerator cable 62 swings the speed control arm 64 with the restoring force of the speed control arm 64 to adjust the speed of the engine 10 so as to reduce the rotational speed. When the speed control operation of the engine 10 is performed in this way, the accelerator operating tool 60 is held at an arbitrary operation position against the restoring force of the speed control arm 64 by the friction plate 68, and the rotational speed of the engine 10 is reduced. Maintain regulated speed.

  FIG. 9 is a side view showing a state where the accelerator operating tool 60 of the engine speed control device G is operated to the set low speed position L and the swing operation body 69 is operated to the clutch disengagement region. FIGS. 12A and 12B are side views in the process in which the swing operation body 69 is operated from the clutch disengagement area to the clutch engagement area. FIG. 12C is a side view showing a state where the swing operation body 69 of the engine speed control device G is operated in the clutch engagement area. FIG. 12 (d) is a side view showing a state where the swing operation body 69 of the engine speed control device G is operated to return to the clutch disengagement region.

  As shown in these figures, when the electric motor 22 swings the threshing clutch operating body 31 so that the threshing clutch 14 is switched to the engaged state, the threshing clutch operating body 31 is swung via the rotary support shaft 37. 69 is swung in the forward rotation direction a2 from the clutch disengagement region. As the swing operation body 69 swings, the end portion 69b of the swing operation body 69 comes into contact with the passive portion 70a of the operation section 70 located at the standby position T. Then, the passive portion 70a receives the operating force of the swing operation body 69, and the operation portion 70 swings from the standby position T in the action direction a1. At this time, if the accelerator operating tool 60 is at the set low speed position L, that is, if the rotational speed of the engine 10 is in a set low speed range corresponding to the operating position of the accelerator operating tool 60 (set low speed position L), The transmission part 70 b of the part 70 contacts the output arm part 60 a of the accelerator operation tool 60. Then, the operating unit 70 moves and operates the accelerator operating tool 60 by the transmission unit 70b. As a result, the engine speed control device G operates to control the engine 10 to the speed increasing side.

  The operation unit 70 operates the accelerator operating tool 60 to the set high speed position H as the swing operation body 69 reaches the start end side of the clutch engagement area. After the accelerator operating tool 60 reaches the set high speed position H, the passive portion 70a of the operating portion 70 is separated from the end portion 69b of the swing operating body 69, and the electric motor 22 further rotates to enter and operate the mowing clutch 17. Even if the swing operation body 69 is further moved to swing the clutch engagement area, the operation operation of the accelerator operation tool 60 by the operation unit 70 is not performed, and the accelerator operation tool 60 is moved to the set high speed position H by the friction plate 68. The engine 10 is held at a set high speed corresponding to the set high speed position H of the accelerator operating tool 60.

  After the engine 10 reaches the set high speed, the free end portion 69a of the swing operation body 69 is disengaged from the passive portion 70a of the operation portion 70, and the operation portion 70 is moved to the standby position T by swinging bias by the winding spring 75. Return. As a result, the accelerator operation tool 60 is not subjected to the swing restriction by the operation unit 70 and the swing operation body 69.

  When the electric motor 22 swings the threshing clutch operating body 31 so that the threshing clutch 14 is switched to the disengaged state after the engine 10 is adjusted to the set high speed, the swing operating body 69 together with the threshing clutch operating body 31. Swing. That is, the swing operation body 69 swings in the reverse rotation direction b2. At this time, even if the end portion 69b of the swing operation body 69 comes into contact with the passive portion 70a of the operation unit 70 located at the standby position T, and the operation unit 70 swings from the standby position T in the release direction b1, The operation unit 70 does not press the accelerator operation tool 60. Thereby, the accelerator operating tool 60 is maintained at the set high speed position H, and the engine 10 maintains the set high speed.

  When the electric motor 20 swings the cutting clutch operating body 33 so as to operate the cutting clutch 17 in the disengaged state, the swing operating body 69 further swings in the reverse rotation direction b2. Then, the end portion 69 b of the swing operation body 69 is disengaged from the passive portion 70 a of the operation unit 70, and the operation unit 70 returns to the standby position T by the swinging bias by the winding spring 75, and then the swing operation body 69. Is swung in the forward rotation direction a2, the end portion 69b of the swing operation body 69 and the passive portion 70a of the operation unit 70 come into contact with each other. That is, the operation unit 70 is swung in the action direction a1 by the swing operation body 69.

In other words, when work is not performed such as traveling, the threshing device 5 and the mowing unit 4 are stopped when the work selection means 25 is switched to the cut position “cut”.
That is, when the work selection means 25 is switched to the cut position “OFF”, the control means 42 controls the electric motor 22 based on the OFF command from the work selection means 25. Then, the electric motor 22 operates the threshing clutch operating body 31 to the cutting area 31 </ b> A, and operates the threshing clutch 14 to the disconnected state via the threshing clutch interlocking mechanism 32. Furthermore, by the control of the electric motor 22 by the control means 42, the electric motor 22 operates the reaping clutch operating body 33 to the cutting area 33 </ b> A and operates the reaping clutch 17 to the disconnected state via the reaping clutch interlocking mechanism 34. Thereby, the threshing device 5 and the cutting unit 4 are stopped.

  At the time of work, when the work selection means 25 is switched to the on position “on” and the shift lever 24 is operated to the operation position corresponding to the work or running, the threshing device 5 and the mowing unit 4 drive corresponding to the work or running. It becomes a state and a stop state.

  That is, when performing the pillow handling work, the speed change lever 24 is operated to the neutral position N so as to stop the self-propelled machine body. When the self-propelled machine body travels backward for turning, the speed change lever 24 is operated in the reverse region R. Then, the control means 42 controls the electric motor 22 based on the ON command from the work selection means 25 and the detection information from the shift detection means 41. Thereby, the electric motor 22 operates the cutting clutch operating body 33 to the cut area 33A, and operates the cutting clutch 17 to the cut state via the cutting clutch interlocking mechanism 34. Furthermore, by the control of the electric motor 22 by the control means 42, the electric motor 22 operates the threshing clutch operating body 31 to the entering area 31 </ b> B, and operates the threshing clutch 14 to the engaged state via the threshing clutch interlocking mechanism 32. Thereby, the cutting part 4 stops and the threshing apparatus 5 is driven.

  When cutting and traveling, the shift lever 24 is operated to the forward region F so that the self-propelled machine body travels forward. Then, the control means 42 controls the electric motor 22 based on the ON command from the work selection means 25 and the detection information from the shift detection means 41. As a result, the electric motor 22 operates the cutting clutch operating body 33 to the entering area 33B, and operates the cutting clutch 17 to the engaged state via the cutting clutch interlocking mechanism 34. Furthermore, by the control of the electric motor 22 by the control means 42, the electric motor 22 operates the threshing clutch operating body 31 to the entering area 31 </ b> B, and operates the threshing clutch 14 to the engaged state via the threshing clutch interlocking mechanism 32. As a result, the mowing unit 4 and the threshing device 5 are driven.

  As described above, when the threshing clutch 14 is switched to the engaged state, the engine 10 is operated at a high rotational speed even if the engine 10 has a low rotational speed in the set low rotational speed range set for stopping the machine body. The speed is naturally adjusted.

  That is, when the electric motor 22 swings the threshing clutch operating body 31 into the entry area 31b, if the accelerator operating tool 60 is located at the set low speed position L, the swinging operation swings together with the threshing clutch operating body 31. The free end portion 69b of the body 69 abuts on the passive portion 70a of the operation portion 70 located at the standby position T, and the swing operation body 69 swings the operation portion 70 in the action direction a1. Then, the transmission part 70 of the operation part 70 contacts the output arm part 60a of the accelerator operation tool 60, and the operation part 70 swings the accelerator operation tool 60. As a result, the engine speed control device G operates to operate the accelerator device 63 to the speed increasing side. When the accelerator operating tool 60 reaches the set high speed position H, the swing operating body 69 is detached from the operation unit 60, and the friction plate 68 holds the accelerator operating tool 60 at the set high speed position H. As a result, the engine 10 has a rotation speed corresponding to the set high speed position H of the accelerator operating tool 60, that is, the set high rotation speed set as the work rotation speed.

  As described above, after the engine 10 is adjusted to the set high speed by the operation of the engine speed control apparatus G by the clutch operating device C, the engine 10 is artificially reduced to a lower speed than the set high speed. It can be controlled.

  That is, after the operating unit 60 operates the accelerator operating tool 60 to the set high speed position H, the free end 69a of the swing operating body 69 is disengaged from the passive unit 70a of the operating unit 60, and the operating unit 60 returns to the standby position T. As a result, the output arm portion 60a of the accelerator operating tool 60 is separated. Further, the swing operation body 69 is separated from the operation unit 60. As a result, the accelerator operating tool 60 is in a state where it can be manually operated from the set high-speed position H to the deceleration side without being subjected to the swing restriction by the operation unit 60 and the swing operating body 69.

  Moreover, even if the threshing device 5 is stopped after the engine 10 is adjusted to the set high speed by the operation of the engine speed control apparatus G by the clutch operating device C, the engine 10 maintains the set high speed. .

  That is, when the electric motor 22 operates the threshing clutch operating body 31 to the cutting area 31A with the accelerator operating tool 60 positioned at the set high speed position H, the swing operating body 69 swings together with the threshing clutch operating body 31. And swings in the release direction b1. Along with this, even if the tip 69a of the swing operation body 69 abuts on the passive portion 70a of the operation unit 60 located at the standby position T and the swing operation body 69 swings the operation unit 60, The operation unit 60 swings in the release direction b <b> 1 and does not press the accelerator operation tool 60. As a result, the accelerator operating tool 60 is held at the set high speed position H by the friction plate 68, and the engine 10 maintains the set high speed corresponding to the set high speed position H of the accelerator operating tool 60.

  FIG. 13 is a plan view of a portion of the operation panel 35 where the speed change lever 24 is provided. FIG. 14 is a cross section of the operation panel 5. As shown in these drawings, the operation panel 35 includes a guide groove 50 that forms an operation path of the speed change lever 24 and a rubber plate 52 attached to a rubber support portion 51 provided on the back side of the operation panel 35. I have.

  The rubber plate 52 includes a lid portion 53 that is positioned below the guide groove 50 so as to close the guide groove 50, and a slit 54 that is provided so that the transmission lever 24 is inserted into the lid portion 53. The operation panel 35 includes a bent end portion 35a disposed around the guide groove 50, and a pressing plate 56 attached to the rubber plate support portion 51 by co-tightening the rubber plate 52 with a mounting screw 55. I have.

  The bent end portion 35a presses the base portion of the rubber piece portion 53a located on the lateral side of the slit 54 in the lid portion 53 from above. The pressing plate 56 receives and supports the rubber plate 52 from below on the laterally outer side of the bent end portion 35a than the bent end portion 35a, and the rubber piece portion 53a guides the guide groove 50 toward the inner side of the guide groove. It is in a downwardly inclined arrangement state in which the distance from the groove 50 is increased. As a result, the rubber piece 53a is lifted into the guide groove 50 by friction with the speed change lever 24 and is sandwiched between the speed change lever 24 and the operation panel 35, thereby avoiding a situation in which the rubber piece 53a is cut. It has become easier.

FIG. 15 is a side view of an automatic engine speed governor having another implementation structure.
As shown in this figure, the engine automatic speed governor having another embodiment structure includes a rotating cam 78 provided on the rotating support shaft 37 so as to be integrally rotatable, and a connecting pin 79 provided on the accelerator operating tool 60. ing. The rotating cam 78 includes a speed control cam surface 78a provided on the peripheral surface thereof and a maintenance cam surface 78b. The connecting pin 79 connects the accelerator operating tool 60 and the spring 66.

  FIG. 15 (a) is a side view of the automatic engine speed governor immediately before the engine speed increasing operation. FIG. 15B is a side view after the engine speed increasing operation of the automatic engine speed governor. As shown in these drawings, when the electric motor 22 swings the threshing clutch operating body 31 so that the electric motor 22 enters and operates the threshing clutch 14, the accelerator operating tool 60 is set to the set low speed position L. The accelerator operating tool 60 from the set low speed position L to the set high speed position H by pressing the connecting pin 79 by the speed adjusting cam surface 78a of the rotating cam 78 rotating together with the threshing clutch operating body 31. Swing operation. After the accelerator operating tool 60 swings to the set high-speed position H, when the rotary cam 78 further rotates for the operation of engaging the mowing clutch 17 by the electric motor 22, the maintenance cam surface 78b is brought into sliding contact with the connecting pin 79 and maintained. The accelerator operating tool 60 is maintained at the set high speed position H by the arc shape of the cam surface 78b.

[Another Example]
The object of the present invention can be achieved even if various types of clutches such as a friction clutch are employed instead of employing the belt tension clutch as the threshing clutch 14 and the mowing clutch 17 as in the above embodiment. The object of the present invention can also be achieved by adopting a configuration in which various interlocking members such as interlocking rods are employed instead of providing the interlocking spring 34b in the mowing clutch interlocking mechanism 34 as in the above embodiment. . The object of the present invention can also be achieved by adopting a configuration in which the interlocking interlocking portion 39 is provided in the tension arm 17b instead of the mowing clutch operating body 33 or the intermediate portion of the interlocking spring 34b. Therefore, the tension arm 14b is referred to as a threshing clutch operation unit 14b, and the tension arm 17b is referred to as a mowing clutch operation unit 17b. The interlocking spring 14b is referred to as the operating body side interlocking member 14b, and the interlocking pin 40 is referred to as the clutch side interlocking member 40.

Combine side view Schematic diagram of the transmission Block diagram of control unit Clutch operation flow chart Side view in a state in which the threshing clutch and the mowing clutch of the clutch switching unit are turned off. Side view with the threshing clutch of the clutch switching unit turned on and the mowing clutch turned off Side view in a state where the threshing clutch and the mowing clutch of the clutch switching unit are engaged and operated. Explanatory drawing which shows the operation range of a threshing clutch operating body and a mowing clutch operating body Side view when the accelerator operating tool of the engine speed control device is operated to the set low speed position Longitudinal cross section of engine speed control device Perspective view of the operation unit (A) is a side view in the process of operating the swing operating body of the engine speed control device, (B) is a side view in the operation process of the swing operating body of the engine speed control device, and (C) is The side view in the state where the swing operation body of the engine speed control device is operated in the clutch engagement region, (d) is the state in which the swing operation body of the engine speed control device is operated in the clutch disengagement region Side view Plan view of operation panel Cross section of operation panel (B) Side view of the engine automatic governor immediately before the engine speed increasing operation, (b) Side view of the engine automatic speed governor after the engine speed increasing operation

Explanation of symbols

14 Threshing Clutch 14b Threshing Clutch Operating Unit 17 Mowing Clutch 17b Mowing Clutch Operating Unit 22 Electric Motor 31 Threshing Clutch Operating Body 31A Cutting Area 31B for Threshing Clutch Operating Body 32 Entering Area for Threshing Clutch Operating Body 33 33A Cutting region of cutting clutch operating body 33B Entering region of cutting clutch operating body 34 Cutting clutch interlocking mechanism 34b Operating body side interlocking member 39 Interlocking interlocking portion 40 Clutch side interlocking member X Forward rotation direction Y Reverse rotation direction

Claims (2)

A clutch operating device for a combine configured to switch a threshing clutch and a mowing clutch with the same electric motor,
The threshing clutch operating unit linked to the threshing clutch operating unit for switching the threshing clutch via the threshing clutch interlocking mechanism, and the chopping clutch operating unit for switching to the chopping clutch linked to the threshing clutch operating mechanism via the cutting clutch interlocking mechanism A mowing clutch operating body is provided so as to be freely rotatable in the forward rotation direction and the reverse rotation direction integrally by the electric motor,
When the electric motor rotates the threshing clutch operating body and the reaping clutch operating body in the forward rotation direction from the cutting area, and the threshing clutch operating body is positioned before the dead point, the threshing clutch operating body is positioned in the entering area. The threshing clutch interlocking mechanism operates the threshing clutch operating part to the clutched attitude, and the reaping clutch operating body is located in the cutting area, and the reaping clutch interlocking mechanism operates to maintain the cutting clutch operating part in the clutch disengaging position, When the electric motor further rotates the threshing clutch operating body and the mowing clutch operating body in the forward rotation direction, and the threshing clutch operating body exceeds the dead point, the threshing clutch operating body is located in the above-mentioned range and interlocked with the threshing clutch. The mechanism maintains the threshing clutch operating part in the clutch-engaged position, and the mowing clutch operating body is located in the entering area, Mechanism the clutch operating device combine to have configured as the threshing clutch interlock mechanism so as to operate the clutch engaging position and the clutch interlock mechanism of the clutch operation portion cutting. An accommodating state in which the operating body side interlocking member coupled to the mowing clutch operating body and the clutch side interlocking member coupled to the mowing clutch operating portion are relatively moved to the mowing clutch interlocking mechanism, the operating body side interlocking member and the In addition to having a flexible interlocking portion that can be switched to a flexible release state for integrally moving the clutch-side interlocking member,
The interlocking interlocking unit is configured so that the mowing clutch operating unit is engaged with the clutch after the threshing clutch operating unit is switched to the clutched attitude in accordance with the rotation operation of the mowing clutch operating body in the forward rotation direction by the electric motor. A clutch operating device for a combine that is configured to switch from the accommodation state to the accommodation release state so as to be switched.

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