JP5792505B2 - Combine - Google Patents

Description

  The present invention includes a swing operation type shift lever that sets a traveling speed of a traveling machine body, and a swing operation type mowing clutch lever that intermittently drives driving force to a mowing unit, and the mowing clutch lever is in an in-position. It is related with the combine provided with the check mechanism which checks operation to the high-speed position side of the said shift lever in the state in.

  As a combine configured as described above, in Patent Document 1, a shift lever (sub shift lever in the literature) and a cutting clutch lever are arranged at the front and rear positions, and these are linked by a check mechanism (a check device in the reference). The configuration is shown. The check mechanism has a check rod connected to the second arm of the cutting clutch lever and a pin formed on the second arm of the speed change lever, and by inserting the pin into a long hole formed in the check rod, The operation amount of the speed change lever and the mowing clutch lever is controlled.

  In Patent Document 1, by providing a check mechanism, when the shift lever is in the high speed position, the operation of the cutting clutch lever is disabled, and when the cutting clutch lever is in the closing position, The shifting lever cannot be operated to the high speed position. Further, when the shift lever is in the high speed position, the shift lever is moved to the standard travel position when the cutting clutch lever is operated to the clutch engagement position.

JP 2010-124664 A

  When performing a harvesting operation with a combine, the cutting clutch is set to the on position and the traveling vehicle body is caused to travel. However, for the purpose of avoiding the operation in a state where the traveling aircraft body travels at a high speed, Patent Document 1 discloses. A check mechanism is also provided.

  In the check mechanism having the configuration described in Patent Document 1, the check mechanism is provided on the lower side of the speed change lever and the reaping clutch lever. Therefore, only a space including the check rod is required on the lower side of these levers. Since the pin inserted into the long hole formed at the end of the check rod is in contact with the end of the long hole, the operation limit between the transmission lever and the cutting clutch lever is determined. Requires relative position adjustment.

  As described above, the configuration shown in Patent Document 1 requires a space for arranging the members constituting the check mechanism, and also requires a predetermined accuracy in order to properly operate the check mechanism. There is room for improvement.

  An object of the present invention is to configure a restraining mechanism that restrains the mutual operation of the transmission lever and the mowing clutch lever so that it can be operated with relatively low accuracy and can be arranged in a small space.

A feature of the present invention is that it includes a swing operation type shift lever that sets a traveling speed of a traveling machine body, and a swing operation type cut clutch lever that intermittently drives a cutting force. A combine provided with a check mechanism for checking the operation of the speed change lever to the high speed position side in the state where the speed change lever is in the operation position, the operation direction of the speed change lever to the high speed position and the cutting position of the cutting clutch lever Is set in the same direction, and the cutting clutch lever is disposed in an extended region of the operating direction of the speed change lever to the high speed position, and the swinging shaft core is placed in a state where the cutting clutch lever is in the cutting position. A base end portion extending in a direction away from the speed change lever with respect to a reference, and a main lever portion extending from the extension end of the base end portion in a direction intersecting the extension direction of the base end portion. mechanism And a check member that moves in accordance with the operation of the shift lever. The check member is configured to move the clutch clutch when the shift lever is operated to the high speed position side with the cut clutch lever in the cut position. By moving along the extending direction of the base end portion of the lever, the shift lever is allowed to operate at a high speed position, and the shift lever is moved to the high speed position side with the cutting clutch lever in the engaged position. If it is operated, that said restraining member is brought into contact with the base end portion, relative positional relationship between the base end portion so as to check the operation of the high speed position of the shift lever is set, the When the speed change lever is operated to the high speed position, the restraining member enters the swing locus of the base end portion between the cutting position and the entering position of the cutting clutch lever, and the cutting clutch lever is moved. It lies in the fact that the operation to enter the position of the over is checks and balances.

According to this configuration, when the speed change lever is operated to the high speed position with the cutting clutch lever in the cut position, the check member moves along the extending direction of the base end portion of the cutting clutch lever as the speed change lever is operated. It moves and the shift lever is allowed to operate to the high speed position. In addition, when the shifting lever is to be operated to the high speed position side with the cutting clutch in the engaged position, the check member contacts the base end of the cutting clutch lever, so that the operation of the shifting lever to the high speed position is Be restrained.
In particular, in this configuration, since the check member moves in accordance with the operation of the speed change lever, a large arrangement space is not required, and the check is performed by the contact between the check member and the base end portion of the cutting clutch lever. High accuracy is not required for the member and the base end.
Therefore, the restraining mechanism that restrains the mutual operation of the transmission lever and the mowing clutch lever can be operated with relatively low accuracy and can be arranged in a small space.

A feature of the present invention is that it includes a swing operation type shift lever that sets a traveling speed of a traveling machine body, and a swing operation type cut clutch lever that intermittently drives a cutting force. A combine provided with a check mechanism for checking the operation of the speed change lever to the high speed position side in the state where the speed change lever is in the operation position, the operation direction of the speed change lever to the high speed position and the cutting position of the cutting clutch lever Is set in the same direction, and the cutting clutch lever is disposed in an extended region of the operating direction of the speed change lever to the high speed position, and the swinging shaft core is placed in a state where the cutting clutch lever is in the cutting position. A base end portion extending in a direction away from the speed change lever with respect to a reference, and a main lever portion extending from the extension end of the base end portion in a direction intersecting the extension direction of the base end portion. mechanism And a check member that moves in accordance with the operation of the shift lever. The check member is configured to move the clutch clutch when the shift lever is operated to the high speed position side with the cut clutch lever in the cut position. By moving along the extending direction of the base end portion of the lever, the shift lever is allowed to operate at a high speed position, and the shift lever is moved to the high speed position side with the cutting clutch lever in the engaged position. When operated, the restraining member abuts on the base end portion, so that the relative positional relationship with the base end portion is set so as to restrain the operation of the shift lever to the high speed position, and A horizontal guide plate formed with a transmission lever guide hole through which the transmission lever penetrates in the vertical direction and a cutting clutch lever guide hole through which the cutting clutch lever penetrates in the vertical direction The restraining member is supported on the lower side of the guide plate so as to be movable along the guide plate and prevent upward displacement, and the cutting clutch lever is in the cut position, The base end portion is formed in a posture extending in the horizontal direction below the guide plate, the main lever portion is formed in a posture extending upward from the extending end of the base end portion, and the cutting clutch lever is in the cut position. When the shift lever is operated to the high speed position in this state, the restraining member is inserted between the base end portion and the guide plate.

According to this configuration, when the speed change lever is operated to the high speed position with the cutting clutch lever in the cut position, the check member moves along the extending direction of the base end portion of the cutting clutch lever as the speed change lever is operated. It moves and the shift lever is allowed to operate to the high speed position. In addition, when the shifting lever is to be operated to the high speed position side with the cutting clutch in the engaged position, the check member contacts the base end of the cutting clutch lever, so that the operation of the shifting lever to the high speed position is Be restrained.
In particular, in this configuration, since the check member moves in accordance with the operation of the speed change lever, a large arrangement space is not required, and the check is performed by the contact between the check member and the base end portion of the cutting clutch lever. High accuracy is not required for the member and the base end.
Therefore, the restraining mechanism that restrains the mutual operation of the transmission lever and the mowing clutch lever can be operated with relatively low accuracy and can be arranged in a small space.
In addition, when the cutting clutch lever is operated to the entering position side while the speed change lever is operated at the high speed position, the base end portion of the cutting clutch lever is displaced in a direction approaching the guide plate. Since the restraining member is inserted between the base end portion and the guide plate, the restraining member restrains the upward displacement of the base end portion, and the operation of the cutting clutch lever to the entering position is restrained. The Further, by arranging the restraining member on the lower surface of the guide plate, the guide plate can prevent the restraining member from being displaced upward, so that the guide plate can be used as the guide member, and the number of parts can be reduced.

According to the present invention, when the shift lever is operated to the high speed position and the reaping clutch lever is operated from the cut position to the entry position side, the predetermined surface having a posture along the movement direction of the restraining member; The one side surface of the base end portion of the reaping clutch lever may be in contact with each other in a posture along which the operation to the position where the reaping clutch lever is engaged may be restrained .

According to this, when an attempt is made to operate the reaping clutch to the engaged position while the speed change lever is being operated at the high speed position, the predetermined surface of the restraining member and one side surface of the proximal end portion of the reaping clutch lever are along each other. Since the contact is made in the posture, the mowing clutch lever can be held at the cut position while the shift lever is held at the high speed position without generating a component force that moves the shift lever to the low speed position side.

It is a whole side view of a combine. It is a top view of an operation part. It is a top view which shows an operation panel. It is a side view which shows the operation system of a subtransmission lever and a cutting clutch lever. It is a side view which shows the positional relationship of a cutting clutch lever and a check member. It is a top view of a check member. It is a figure which shows the transmission system of a combine typically. It is a side view which shows a brake pedal and a lock plate. It is a front view which shows a switching lever and a holding plate. It is a top view which shows a switching lever and a holding plate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Overall structure of the combine]
As shown in FIG. 1, the front end of a traveling machine body A traveling by a pair of left and right crawler traveling devices 1 is provided with a cutting part B that can be moved up and down by the operation of the lifting cylinder 10, and a driver boardes the front part of the traveling machine body A. A threshing device D that includes a driving unit C that performs the operation and supplies a harvested cereal meal from the reaping unit B to the traveling machine A, and a grain tank E that stores the grains selected by the threshing device D. Self-detaching combine is configured.

  In this combine, when the harvesting part B and the threshing device D are driven during the harvesting operation, the traveling machine body A is advanced to cut the stock of the culm by the reaping part B and to harvest the culm. The cereal is transported to the threshing device D to perform the threshing process, and the grain obtained by the threshing process of the threshing apparatus D is stored in the grain tank E.

  As shown in FIG. 2, the driver C is provided with a step 11 on which the driver gets on and a driver seat 12 on which the driver is seated, and a control lever operated by the driver at a position in front of the driver seat 12. 13, a main transmission lever 14, an auxiliary transmission lever 15, a mowing clutch lever 16, and a threshing clutch lever 17 are provided in a lateral position of the driver seat 12, and a brake pedal 18 is provided in Step 11. ing.

  The combine includes a drive mechanism (not shown) that moves the left and right crawler travel devices 1 up and down independently by the operation of an actuator, and a rolling control device that controls the drive mechanism. Further, the harvesting part B is provided with a culm transporting mechanism 8 for transporting the harvested sorghum (harvested sorghum). A handling depth adjusting mechanism 8A is provided. This handling depth adjusting mechanism 8A changes the pinching position of the harvested culm in the feed chain FC by changing the pinching position of the culm conveyed by the culm transporting mechanism 8, and inserts the tip side in the threshing device D Realize the depth control to adjust the amount. Thus, the operation panel 21 for performing artificial setting of rolling control and artificial setting of handling depth control is provided on the front left side of the driver seat 12.

  On the left side of the operation panel 21, as shown in FIG. 3, a depth control switch 22 for selecting whether to start and stop the depth control by pressing, and a start and stop for rolling control are selected by pressing. A rolling control switch 23 is provided. When the rolling control is started by the rolling control switch 23, the control for moving the left and right crawler traveling devices 1 up and down so as to maintain the traveling machine body A in a horizontal posture is performed by rolling. A reference selection switch 24, an inclination angle setting switch 25, and an elevation amount setting switch 26 are provided.

  The reference selection switch 24 is set to the ON position by operating in the left-right direction, thereby setting the control reference (the ground height of the traveling machine body A) in the rolling control to a high level, and the OFF position. By setting to, a toggle switch type is configured to select “lowering reference control” that sets the control reference in rolling control to a low level. The tilt angle setting switch 25 has a structure in which the horizontal posture is maintained in a non-operating state and the right or left side can be pushed. When the right side is pushed, the traveling machine body A has priority over rolling control. When the right side of the vehicle is lowered and the left side is pushed, control for lowering the left side of the traveling machine body A is realized in preference to the rolling control. The lifting / lowering amount setting switch 26 has a structure in which the horizontal posture is maintained in a non-operating state and can be pushed upward or downward, and when the upper side is pushed, the traveling body A is lowered in the horizontal posture. When the lower side is pushed, control is performed to simultaneously operate both of the crawler traveling devices 1 so as to raise the traveling machine body A in a horizontal posture.

  The operation panel 21 may be a toggle switch type that operates in the front-rear direction as the reference selection switch 24. The operation depth control switch 22, the rolling control switch 23, the reference selection switch 24, The arrangement of the inclination angle setting switch 25 and the lift amount setting switch 26 may be other than that shown in the drawing.

  An engine 2 is provided at a lower position of the driver seat 12, and a transmission case 3 for transmitting driving force to the left and right crawler traveling devices 1 is disposed at the center position in the left-right direction at the front position of the traveling machine body A, and FIG. As shown, a hydrostatic continuously variable transmission 4 (HST) is connected to the upper part of the transmission case 3. The transmission system between the engine 2 and the continuously variable transmission 4 is provided with a main belt transmission mechanism 5 that interrupts the driving force, and the transmission system that transmits the driving force from the transmission case 3 to the cutting part B has a belt. A tension type mowing clutch 6 is provided, and a belt tension type threshing clutch 7 is provided in a transmission system for transmitting a driving force from the engine 2 to the threshing device D.

  The transmission case 3 has a built-in gear-type sub-transmission mechanism 3T that shifts the driving force transmitted from the continuously variable transmission 4 in two steps, high and low. The driving force shifted by the sub-transmission mechanism 3T is driven left and right. A traveling drive system that transmits from the sprocket 3 </ b> S to the left and right crawler traveling devices 1 is built in the transmission case 3. In addition, the transmission case 3 includes a steering clutch mechanism 3A that intermittently interrupts the driving force transmitted to the left and right drive sprockets 3S, and a brake mechanism 3B that simultaneously applies a braking force to the left and right drive sprockets 3S. Yes. Although not shown in the drawing, the left and right steering clutch mechanism 3A is operated by left and right steering cylinders that are hydraulically operated.

  The control lever 13 maintains a neutral posture in a non-operating state, and operates a steering control valve (not shown) when operated in any of the left and right directions, and controls the left and right steering clutch mechanisms 3A. Of these, the hydraulic oil is supplied from the steering control valve to the one corresponding to the operation (for example, the right steering clutch mechanism 3A when operated to the right side) to cut off the power to realize the steering of the traveling machine body A. In addition, when the control lever 13 is operated in the front-rear direction, a lifting control valve (not shown) is operated to supply and discharge hydraulic oil to and from the lifting cylinder 10 so as to raise and lower the cutting part B.

  The main transmission lever 14 is located between a neutral position N at which the traveling machine body A stops, a forward shift range between the neutral position N and the forward advance position F, and a reverse position R from the neutral position N to the rearward position. The main transmission lever 14 and the continuously variable transmission 4 are linked and linked by a rod, a wire, or the like, so that a stepless speed change operation by the operation of the main transmission lever 14 can be performed. Realize. The auxiliary transmission lever 15 is configured to be freely operated at a high speed position “H” and a low speed position “L”, and the auxiliary transmission lever 15 and the auxiliary transmission mechanism 3T are linked and linked by a transmission rod 41 (see FIG. 4). Thus, switching between high-speed traveling and low-speed traveling is realized by operating the auxiliary transmission lever 15.

  As shown in FIG. 4, the cutting clutch lever 16 is configured to be switchable between an on position “on” and a cutting position “off” by a swing operation, and the cutting clutch lever 16 and the cutting clutch 6 are connected to a clutch rod. The interlocking connection by 44 enables the cutting clutch 6 to be turned on and off by operating the cutting clutch lever 16. The threshing clutch lever 17 is configured to be freely switchable between an on position “on” and a cutting position “off” by a swing operation, and the threshing clutch lever 17 and the threshing clutch 7 are interlocked and connected by an operation wire 49. The threshing clutch 7 can be turned on and off by operating the threshing clutch lever 17.

  The brake pedal 18 works in conjunction with the brake mechanism 3B built in the transmission case 3 to apply a braking force to the left and right crawler travel devices 1 in conjunction with the depression operation of the brake pedal 18.

  As shown in FIG. 2, a side panel as a side control tower and a horizontal guide plate 30 constituting the upper surface of the side panel are disposed on the left side of the driver seat 12. A main transmission guide hole G14 through which the transmission lever 14 penetrates up and down, an auxiliary transmission guide hole G15 through which the auxiliary transmission lever 15 penetrates up and down, a cutting clutch guide hole G16 through which the cutting clutch lever 16 passes up and down, and a threshing clutch lever A threshing clutch guide hole G17 through which 17 vertically penetrates is formed. Further, the main transmission lever 14 and the auxiliary transmission lever 15 are arranged in parallel on the left and right, and the cutting clutch lever 16 and the threshing clutch lever 17 are arranged in parallel on the left and right at the rear position.

[Sub-shift lever and mowing clutch lever]
In this combine, as shown in FIGS. 4 to 6, when the cutting clutch lever 16 is in the cutting position “OFF”, the auxiliary transmission lever 15 can be operated to the high speed position “H”, and the cutting clutch lever 16 When the is in the on position “on”, a plate-like restraining member 31 is provided as a restraining mechanism for restraining the operation of the auxiliary transmission lever to the high speed position “H”.

  The operation direction of the auxiliary transmission lever 15 to the high speed position “H” and the operation direction of the cutting clutch lever 16 to the cutting position “OFF” are set to the same direction, and the auxiliary transmission lever 15 is moved to the high speed position “H”. The cutting clutch lever 16 is disposed in the extended region in the operation direction. The sub-transmission lever 15 is supported by the support frame 35 of the traveling machine body A so as to be swingable in the front-rear direction around the first swing axis X1 in the horizontal posture, and the cutting clutch lever 16 is the second swing in the horizontal posture. It is supported in a swingable manner on a guide frame 36 on the lower surface side of the guide plate 30 in the front-rear direction around the axis X2.

  In addition, the cutting clutch lever 16 is supported in such a manner that it can swing in the front-rear direction around the second swing axis X2 in the lateral orientation, for example, the second swing axis X2 in an oblique orientation or By adopting a vertical orientation, the mowing clutch lever 16 may be configured to be operated on a tilting virtual plane, or may be configured to be operated on a horizontal virtual plane. In this case, the posture of the first swing axis X1 that supports the auxiliary transmission lever 15 is preferably parallel to the posture of the second swing axis X2, but may be in a non-parallel state.

  An operating arm 15A that swings integrally with the sub-transmission lever 15 is provided at the lower end position of the sub-transmission lever 15. A swinging end of the operating arm 15A and a speed change operation member (not shown) of the sub-transmission mechanism 3T. Are linked to each other via a speed change rod 41.

  The base end portion of the operating arm 43 is connected to the shaft end of the operating shaft 42 that rotates about the second swinging shaft core X2 during the swinging operation of the harvesting clutch lever 16, and the clutch arm is connected to the swinging end of the working arm 43. The upper end of the rod 44 is supported, a coil spring 45 is connected to the lower end of the clutch rod 44, and the operating arm 43 and the cutting clutch 6 are interlocked and connected via the clutch rod 44 and the coil spring 45.

  The base end portion of the threshing clutch lever 17 described above is connected to a cylindrical shaft 46 that is rotatably fitted to the operating shaft 42, and the base end portion of the operation arm 47 is connected to the cylindrical shaft 46. One end of an arc-shaped operation link 48 is swingably connected to the swing end of the operation arm 47, and the other end of the operation link 48 and the threshing clutch 7 are interlocked and connected by an operation wire 49.

  Although not shown in the drawings, when the cutting clutch lever 16 is operated to the entering position “ON” while the cutting clutch lever 16 and the threshing clutch lever 17 are in the cutting position “OFF”, this operation is linked. The threshing clutch lever 17 is also provided with a mechanical interlocking mechanism that is operated to the entering position “ON”. When the cutting clutch lever 16 is operated to the cutting position “OFF” in a state where the cutting clutch lever 16 and the threshing clutch lever 17 are in the ON position “ON”, the interlocking mechanism moves the threshing clutch lever 17 to the input position “ The cutting operation of the reaping clutch 6 is realized while maintaining “on”. Further, this interlocking mechanism is configured such that when the threshing clutch lever 17 is operated to the on position “on” while the reaping clutch lever 16 and the threshing clutch lever 17 are in the off position “off”, the cutting clutch lever 16 Only the threshing clutch 7 can be entered and operated while maintaining the cutting position “cut”.

[Checking member]
The check member 31 is disposed on the lower surface side of the guide plate 30, and is linked to the auxiliary transmission lever 15 by a linkage pin 32, and the cutting pin 31 is inserted into a long hole 31 </ b> A formed in the check member 31. It is slidably supported so as to be able to perform an operation of approaching and separating from the direction of the lever 16. The guide pin 33 is provided so as to penetrate from the upper surface to the lower surface of the guide plate 30, and a protruding portion of the guide pin 33 protruding from the lower surface of the guide plate 30 is inserted into the long hole 31 </ b> A of the check member 31, A washer 34 is provided at a position below the check member 31 at the protruding portion. With this configuration, the guide pin 33 sets the moving direction of the check member 31, and the washer 34 prevents the check member 31 from being displaced (dropped) downward.

  The guide plate 30 and the washer 34 function as a guide member that allows sliding movement of the check member 31 while preventing the check member 31 from being lifted upward. A rail-like member or the like that allows sliding movement while restricting displacement in the vertical direction may be used.

  The sub transmission lever 15 has a neutral position (N) between the high speed position “H” and the low speed position “L”, but is configured so that the sub transmission lever 15 cannot be held at the neutral position (N). In addition, when the cutting clutch lever 16 is operated to the on position “on”, the sub-shift lever 15 can be operated in the region from the low speed position “L” to the neutral position (N). The check form by the check member 31 is set so that it cannot be operated in the direction of the high speed position “H” beyond the position (N).

  The reaping clutch lever 16 has a base end portion 16A extending in a direction away from the auxiliary transmission lever 15 with the second swing axis X2 as a reference in a state of being in the cut position “cut”, and an extension of the base end portion 16A. A main lever portion 16B extending upward from the end (an example of a direction intersecting the extending direction), and a grip is formed at the protruding end of the main lever portion 16B. In particular, when the cutting clutch lever 16 is set to the cutting position “off”, the base end portion 16A is in a posture parallel to the guide plate 30 below the guide plate 30 and set to the insertion position “on”. The positional relationship between the base end portion 16 </ b> A and the guide plate 30 is set so that a part of the base end portion 16 </ b> A is exposed above the guide plate 30.

  Next, a specific operation mode of the check member 31 will be described. As shown in FIG. 5A, when the auxiliary transmission lever 15 is operated to the high speed position “H” with the cutting clutch lever 16 in the cutting position “OFF”, the base end of the cutting clutch lever 16 is reached. The check member 31 moves along the extending direction of the portion 16A, and the check member 31 is inserted into the space below the guide plate 30 above the base end portion 16A. That is, the operation of the auxiliary transmission lever 15 to the high speed position “H” is allowed. Further, as shown in FIG. 5B, when the auxiliary transmission lever 15 is operated to the high speed position “H” side with the cutting clutch lever 16 in the engaged position “on”, the end of the check member 31 is stopped. The portion 31B comes into contact with the base end portion 16A of the cutting clutch lever 16, and the operation of the auxiliary transmission lever 15 to the high speed position “H” is restrained.

  In particular, as shown in FIG. 5A, the mowing clutch lever 16 is operated from the cut position “OFF” to the input position “ON” side while the auxiliary transmission lever 15 is operated to the high speed position “H”. In this case, as shown by the phantom line in the figure, the bottom surface of the restraining member 31 (an example of a predetermined surface in a posture along the moving direction) and the upper surface (an example of one side surface) of the base end portion 16A of the cutting clutch lever 16 Are brought into contact with each other in a posture (close to parallel), and the operation of the cutting clutch lever 16 to the entering position “ON” is restrained.

  In this configuration, the bottom surface of the check member 31 and the top surface of the base end portion 16 </ b> A of the cutting clutch lever 16 are in contact with each other, so that the guide plate 30 prevents the check member 31 from being lifted and the cutting position of the cutting clutch lever 16 is “ In addition to preventing the operation to “ON”, the bottom surface of the restraining member 31 and the top surface of the base end portion 16A of the harvesting clutch lever 16 are in contact with each other in a posture (a posture parallel to each other). Even when the switch is strongly operated, a component force for moving the check member 31 is not generated from the operation force, and the operation to return the auxiliary transmission lever 15 to the low speed position “L” is not performed by this operation force.

  Further, when the auxiliary transmission lever 15 is operated to the high speed position “H” side with the cutting clutch lever 16 in the on position “on”, the end 31 B of the check member 31 is the base end of the cutting clutch lever 16. The operation of the auxiliary transmission lever 15 is restrained by contacting the portion 16A. However, only in this operation, the restraining member 31 is operated by strongly operating the auxiliary transmission lever 15 to the high speed position “H” side. The operating force from the end portion 31B of the rear end is made to act strongly so that the cutting clutch lever 16 is operated to the cutting position “OFF”, and as a result, the auxiliary transmission lever 15 can be operated to the high speed position “H”. ing.

〔break pedal〕
The brake pedal 18 can be stepped on from a non-operating position indicated by a phantom line in FIG. 8A to an area exceeding a braking position indicated by a solid line in the figure, and is built in the transmission case 3 by being stepped on. The braking mechanism 3B is braked to apply a braking force to the left and right crawler traveling devices 1.

  As shown in FIG. 8, the body frame 51 on the lower surface side of the step 11 is provided with a support shaft 52 on a coaxial support core Y and a support shaft Y in a lateral orientation, and can rotate freely in a state of being externally fitted to the support shaft 52. A cylindrical shaft portion 53 is provided, and a pedal arm 18 </ b> A of the brake pedal 18 is connected to the cylindrical shaft portion 53. One end of a return spring 54 for obtaining an urging force for returning the brake pedal 18 to the non-operating position is connected to the rear end side of the support shaft 52 in the pedal arm 18A, and the swing arm connected to the cylindrical shaft portion 53. The swing end of 55 and the brake mechanism 3 </ b> B are interlocked and connected via a brake rod 56.

  Further, a lock plate 58 that allows the brake mechanism 3B to function as a parking brake by maintaining the depressed state of the brake pedal 18 is provided in the vicinity of the brake pedal 18. The lock plate 58 is swingably supported via a shaft body 59 in a lateral orientation with respect to the body frame 51, and is biased by a spring 60 so that the upper end side is close to the brake pedal 18. A stopper 61 for determining the rocking limit is projected from the body frame 51. Further, a switching lever 62 is connected to the upper end of the lock plate 58 so as to extend upward.

  An engagement pin 63 projecting sideways is provided near the upper end of the pedal arm 18A of the brake pedal 18, and an engagement recess 58A that engages with the engagement pin 63 when the brake pedal 18 is operated beyond the braking position. Is formed on the lock plate 58, and the guide of an inclined posture that swings the upper end of the lock plate 58 forward by the engagement pin 63 coming into contact with the upper end side of the lock plate 58 when the brake pedal 18 is depressed. A surface 58B is formed. As shown in FIGS. 8 to 10, a holding plate 64 that engages and holds the switching lever 62 is provided on the side wall portion of the operating portion C so as to prevent the brake pedal 18 from returning to the non-operation position. It has been.

  The switching lever 62 is made of a material that can be elastically bent and deformed. When the switching lever 62 is operated forward, the lock lever 58 is engaged with and held by the holding plate 64 so that the lock recess 58A is engaged with the engagement recess 58A. Is set to a non-acting posture in which the engaging pin 63 is not engaged. On the contrary, when the switching lever 62 is not engaged and held with the holding plate 64, the lock plate 58 is set to an action posture in which the engagement pin 63 can be engaged with the engagement recess 58A. .

  Due to such a configuration, in a situation where a temporary braking operation is performed, such as during harvesting work or traveling on the road, the switching lever 62 is held by the holding plate as shown in FIGS. 8 (b), 9 and 10. The brake mechanism 3B is operated only when the brake pedal 18 is depressed, and the braking force is applied to the left and right crawler traveling devices 1 by engaging and holding 64 and setting the lock plate 58 to the non-operating posture. Is possible.

  On the contrary, when the vehicle is left in the garage or the like for a long period of time, as shown in FIG. 8A, the switching lever 62 is set to a free state (a state where the holding plate 64 is not held) and the lock plate is set. When the brake pedal 18 is depressed by setting 58 to the action posture, the engagement pin 63 abuts against the guide surface 58B of the lock plate 58 against the biasing force of the spring 60 and The upper end is swung forward, and thereafter the engagement pin 63 engages with the engagement recess 58A of the lock plate 58, and the engagement state is maintained by the biasing force of the spring 60. Thus, the brake mechanism 3B can be maintained in a braking state against the urging force of the return spring 54, and the brake mechanism 3B can be used as a parking brake.

[Operation / Effect of Embodiment]
As described above, when the auxiliary transmission lever 15 is operated to the high speed position “H” in a state where the cutting clutch lever 16 is in the cutting position “OFF”, the check member 31 is moved along with the operation of the auxiliary transmission lever 15. 16 is inserted into the lower side of the guide plate 30 above the base end portion 16A. In this state, when the mowing clutch lever 16 is to be operated to the on position “on” side, the upper surface of the base end portion 16 </ b> A of the mowing clutch lever 16 and the lower surface of the restraining member 31 are in a posture along each other, and the restraining member 31. 16 A of base end parts contact | abut on the lower surface side of this. This contact does not generate a component force that pushes back the check member 31, and even when the cutting clutch lever 16 is strongly operated, this operation is reliably prevented, and the operation of the cutting clutch 6 to the on position “on” is performed. Is restrained.

  Further, when the auxiliary transmission lever 15 is to be operated to the high speed position “H” side while the cutting clutch lever 16 is in the input position “ON”, the check member 31 is placed on the base end portion 16 A of the cutting clutch lever 16. Therefore, the operation of the auxiliary transmission lever 15 to the high speed position “H” is restrained. In such a restrained state, when the auxiliary transmission lever 15 is operated strongly, a force for operating the cutting clutch lever 16 from the restraining member 31 in the direction of the cutting position “OFF” acts. The operation of the cutting clutch lever 16 to the cutting position “cut” by the operation of the lever 15 is allowed.

  In particular, in this configuration, a plate-like member is used as the restraining member 31 and is slidably supported on the lower surface side of the guide plate 30. Therefore, the restraining member 31 is arranged in a small space and restrained in a space-saving manner. In addition to constituting the mechanism, it is not necessary to configure with high precision in order to realize the check of the reaping clutch lever 16 and the auxiliary transmission lever 15 with a simple operation form, and the check member 31 can be manufactured at a low cost with a small number of parts.

  In addition, a lock plate 58 that holds the brake pedal 18 that operates the brake mechanism 3B by a depressing operation is held at the depressing position, and the posture of the lock plate 58 can be switched by the switching lever 62 and the holding plate 64. By setting the lock plate 58 to the non-operating posture, it is possible to temporarily operate the brake mechanism 3B during traveling to apply the braking force, and to set the lock plate 58 to the active posture. Thus, the brake mechanism 3B can be used as a parking brake.

  The present invention can also be used for ordinary type combine harvesters.

15 Shift lever (sub-shift lever)
16 Mowing clutch lever 16A Base end portion 16B Main lever portion 30 Guide plate 31 Checking mechanism / controlling member A Traveling machine body B Cutting portion G15 Shift lever guide hole (sub shift guide hole)
G16 Cutting clutch lever guide hole (cutting clutch guide hole)
H High-speed position X2 Oscillation axis (second oscillation axis)
Cutting position Entering position Entering position

Claims (3)

A swing operation type shift lever for setting the traveling speed of the traveling machine body, and a swing operation type cutting clutch lever for interrupting the driving force to the cutting unit, wherein the cutting clutch lever is in the engaged position. A combine equipped with a check mechanism for checking the operation of the shift lever toward the high-speed position;
The operation direction to the high speed position of the shift lever and the operation direction to the cut position of the cutting clutch lever are set in the same direction, and the cutting clutch lever is located in an extended region of the operation direction to the high speed position of the transmission lever. Arranged,
A base end portion extending in a direction away from the speed change lever with the cutting clutch lever in the cut position as a reference, and a base end in a direction intersecting the extending direction of the base end portion A main lever portion extending from the extended end of the portion,
The check mechanism includes a check member that moves in response to the operation of the shift lever, and the check member is operated when the shift lever is operated to the high speed position side in a state where the cutting clutch lever is in the cut position. The shift lever moves in the extending direction of the base end portion to allow the shift lever to be operated to a high speed position, and the shift lever is in a state where the cut clutch lever is in the engaged position. When operated to the high speed position side, the restraining member comes into contact with the base end portion, so that the relative positional relationship with the base end portion is controlled so as to restrain the operation of the speed change lever to the high speed position. Set ,
When the speed change lever is operated to the high speed position, the restraining member enters the swinging locus of the base end portion between the cutting position and the entering position of the cutting clutch lever, and moves to the entering position of the cutting clutch lever. Combines where the operation of is controlled . A swing operation type shift lever for setting the traveling speed of the traveling machine body, and a swing operation type cutting clutch lever for interrupting the driving force to the cutting unit, wherein the cutting clutch lever is in the engaged position. A combine equipped with a check mechanism for checking the operation of the shift lever toward the high-speed position;
The operation direction to the high speed position of the shift lever and the operation direction to the cut position of the cutting clutch lever are set in the same direction, and the cutting clutch lever is located in an extended region of the operation direction to the high speed position of the transmission lever. Arranged,
A base end portion extending in a direction away from the speed change lever with the cutting clutch lever in the cut position as a reference, and a base end in a direction intersecting the extending direction of the base end portion A main lever portion extending from the extended end of the portion,
The check mechanism includes a check member that moves in response to the operation of the shift lever, and the check member is operated when the shift lever is operated to the high speed position side in a state where the cutting clutch lever is in the cut position. The shift lever moves in the extending direction of the base end portion to allow the shift lever to be operated to a high speed position, and the shift lever is in a state where the cut clutch lever is in the engaged position. When operated to the high speed position side, the restraining member comes into contact with the base end portion, so that the relative positional relationship with the base end portion is controlled so as to restrain the operation of the speed change lever to the high speed position. Set,
A horizontal guide plate formed with a transmission lever guide hole through which the transmission lever penetrates in a vertical direction and a cutting clutch lever guide hole through which the cutting clutch lever penetrates in a vertical direction;
The check member is supported on the lower side of the guide plate in a state of being movable along the guide plate and preventing upward displacement,
With the cutting clutch lever in the cut position, the base end portion is formed in a posture extending horizontally below the guide plate, and the main lever portion extends upward from the extended end of the base end portion. in is formed, when said shift lever is operated to the high speed position in the state in this cutting clutch lever is cut position, the restraining member between the proximal end and the guide plate is inserted Turkey Nbain. In a state where the shift lever is operated at the high speed position, when the cutting clutch lever is operated from the cutting position to the entering position side, a predetermined surface in a posture along the moving direction of the check member, and the cutting clutch lever The combine according to claim 1 or 2 , wherein one side surface of the base end portion comes into contact with each other in a posture along which the operation of the cutting clutch lever is prevented.

Images