JP2016065636A - Harvesting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfy a requirement of a harvesting machine capable of returning a slant plate positively to a neutral position by a brake operation of a parking brake operating tool.SOLUTION: There are provided a stepless speed variator 13 having a trunnion shaft 22 for handling a slant plate angle of a slant plate; a main shift lever 14 for operating the stepless speed variator 13; a parking brake 10 capable of braking a running device; a parking brake pedal 11 for operating the parking brake 10; the first linkage rod 24 for linking the main shift lever 14 to the trunnion shaft 22; the second linkage cable wire 17 for linking the parking brake pedal 11 to the parking brake 10; and the third linkage mechanism 25 constituted in different from the first linkage rod 24 and the second linkage cable wire 17, arranged over the parking brake pedal 11 and the trunnion shaft 22 to return back the trunnion shaft 22 to its neutral position through braking action of the parking brake pedal 11.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a continuously variable transmission having a swash plate capable of changing a swash plate angle, a transmission operating tool for operating the continuously variable transmission, a parking brake capable of braking the traveling device, and a parking brake operating the parking brake. And an operation tool.

  As the harvesting machine as described above, for example, the one described in Patent Document 1 is already known. The combine described in Patent Document 1 includes a continuously variable transmission having a swash plate ("movable swash plate" in the document) that can change the swash plate angle, a parking brake that can brake the traveling device, and a continuously variable transmission. A shift operation tool to be operated (“main shift lever” in the literature) and a parking brake operation tool to operate the parking brake (“parking brake pedal” in the literature) are provided. The parking brake operation tool and the speed change operation tool are linked by a neutral operation member, and the speed change operation tool and the adjustment arm of the continuously variable transmission are linked by a speed control rod.

  According to this configuration, when the parking brake operation tool is operated, the traveling device is braked by the parking brake, and the speed change operation tool is returned to the neutral position by the operation force of the neutral operation member. Then, the adjustment arm of the continuously variable transmission is operated by the operation force of the governing rod in conjunction with the return operation tool being returned to the neutral position. Thus, the continuously variable transmission is braked by returning the swash plate to the neutral position.

JP 2012-62973 A

  In the combine described in Patent Document 1, the parking brake operating tool and the adjustment arm of the continuously variable transmission are linked via the transmission operating tool. When the position changes, the linkage distance between the parking brake operation tool and the transmission operation tool and the linkage distance between the transmission operation tool and the adjustment arm of the continuously variable transmission are affected. If these linkage distances change, even if the parking brake operation tool is operated, there is a possibility that the swash plate may not return to the neutral position when the speed change operation tool is tilted from the neutral position.

  In view of the above situation, there is a demand for a harvester that can reliably return the swash plate to the neutral position by the braking operation of the parking brake operating tool.

The feature of the present invention is that
A continuously variable transmission comprising: a swash plate capable of changing a swash plate angle; and a swash plate operating shaft provided on the swash plate and operating a swash plate angle of the swash plate;
A transmission operating tool for operating the continuously variable transmission;
A parking brake capable of braking the traveling device;
A parking brake operating tool for operating the parking brake;
A first linkage mechanism that links the shift operation tool and the swash plate operation shaft;
A second linkage mechanism that links the parking brake operation tool and the parking brake;
It is configured separately from the first linkage mechanism and the second linkage mechanism, and is provided across the parking brake operation tool and the swash plate operation shaft, and the swash plate operation shaft is moved by a braking operation of the parking brake operation tool. And a third linkage mechanism for returning to the neutral position.

  According to this characteristic configuration, since the third linkage mechanism different from the first linkage mechanism and the second linkage mechanism is provided across the parking brake operation tool and the swash plate operation shaft, the parking brake operation tool and Even if the position of the speed change operation tool with respect to the swash plate operation shaft is changed, the linkage distance between the parking brake operation tool and the swash plate operation shaft is not affected. Therefore, the swash plate can be reliably returned to the neutral position by the braking operation of the parking brake operating tool.

Furthermore, in the present invention,
The third linkage mechanism preferably links the parking brake operating tool and the swash plate operating shaft by braking the parking brake operating tool.

  According to this configuration, the parking brake operating tool and the swash plate operating shaft are linked only when the parking brake operating tool is braked. When the parking brake operating tool is not braked, the parking brake is operated. The brake operating tool and the swash plate operating shaft are not linked. Therefore, when operating the swash plate operation shaft with the speed change operation tool, the third linkage mechanism obstructs the operation of the swash plate operation shaft, or the operation of the swash plate operation shaft is stopped via the third linkage mechanism. The parking brake control tool does not move without permission.

Furthermore, in the present invention,
The third linkage mechanism includes a first engagement portion on the parking brake operation tool side and a second engagement portion on the swash plate operation shaft side, and the parking brake operation tool is braked. Thus, it is preferable that the first engagement portion and the second engagement portion are engaged to link the parking brake operation tool and the swash plate operation shaft.

  According to this feature configuration, the parking brake operating tool and the swash plate operating shaft are simply linked by simply engaging the parking brake operating tool to engage the first engaging portion and the second engaging portion. Can be made. In addition, the use of a linkage mechanism by mechanical engagement eliminates the need for maintenance such as adjustment of the length of the wire, such as a linkage mechanism using a cable wire.

Furthermore, in the present invention,
It is preferable that the third linkage mechanism releases the engagement between the first engagement portion and the second engagement portion when the parking brake operation tool is not braked.

  According to this configuration, when the parking brake operation tool is not braked, the first engagement portion and the second engagement portion are not engaged, and the parking brake operation tool and the swash plate operation shaft are not engaged. The linkage can be surely cut off. That is, when the swash plate operation shaft is operated by the speed change operation tool, the first engagement portion and the second engagement portion obstruct the operation of the swash plate operation shaft, or the operation of the swash plate operation shaft is the first engagement. There is no possibility that the parking brake operating tool will be moved without permission by being transmitted to the parking brake operating tool via the portion and the second engaging portion.

Furthermore, in the present invention,
The parking brake operation tool is connected to a support shaft that is rotatable about an axis along the left-right direction of the machine body, and is configured to be swingable around the axis integrally with the support shaft.
The first engaging portion is formed by an engaging member that is provided on the support shaft so as to protrude in a radially outward direction, and is capable of swinging around the shaft center integrally with the support shaft.
The second engaging portion includes an arm member having an intermediate portion fixed to the swash plate operation shaft, and a pair of operation members connected to positions located on both sides of the arm member with the swash plate operation shaft interposed therebetween. And having
It is preferable that the engaging member and the pair of operating members are configured to be engageable.

  According to this characteristic configuration, the engagement member can be easily engaged with or released from the operation member simply by swinging the parking brake operation tool. Further, the pair of operation members can be operated by one engagement member, and it is not necessary to provide a pair of engagement members for the pair of operation members, and the third linkage mechanism can be simplified.

Furthermore, in the present invention,
One operation member of the pair of operation members is swingably supported on a portion of the arm member on one side with respect to the swash plate operation shaft,
The other operating member of the pair of operating members is swingably supported by the other side of the arm member with respect to the swash plate operating shaft,
A first elongated hole extending along the longitudinal direction is formed in the one operation member,
A second elongated hole extending along the longitudinal direction is formed in the other operation member,
In a state where the first long hole and the second long hole are overlapped, the engagement member is inserted into the first long hole and the second long hole,
By the braking operation of the parking brake operating tool, either the end of the first long hole opposite to the arm member and the end of the second long hole opposite to the arm member, The engagement member is engaged and the arm member is operated, and the engagement member is an end of the first long hole opposite to the arm member and the arm member of the second long hole. The swash plate operating shaft is in a neutral position,
When the parking brake operating tool is not braked, the engaging member, the first elongated hole, and the second elongated hole are relatively movable, and the first interlock mechanism is operated by operating the speed change operating tool. It is preferable that the arm member is operated through the position of the swash plate operating shaft.

  According to this configuration, the arm member is supported by the pair of operation members so as to be swingable, and the engagement member is inserted into the two long holes. An engagement structure can be realized.

Furthermore, in the present invention,
The parts on the opposite side of the arm member of the pair of operation members are connected so as to form a recessed portion that is recessed on the side away from the swash plate operation shaft,
The engaging member is disposed in the recessed portion,
By the braking operation of the parking brake operating tool, the engagement member is slidably guided to the operation member along the recessed shape of the recessed portion, and the arm member is operated, and the engaging member is moved to the recessed portion. Of these, it is preferable that the swash plate operating shaft be in the neutral position when positioned in the deepest portion.

  According to this characteristic configuration, a simple structure in which a pair of operation members are connected to form a recessed portion, and the engaging member is disposed in the recessed portion, the engagement structure of the engagement member and the pair of operation members is provided. Can be realized.

Furthermore, in the present invention,
The third linkage mechanism is preferably constituted by a cable wire.

  According to this feature configuration, the change in the linkage distance between the parking brake operating tool and the swash plate operating shaft can be absorbed by the bending of the cable wire, which is inconvenient for the linkage between the parking brake operating tool and the swash plate operating shaft. It is difficult to come. Further, since the cable wire can be deformed, the parking brake and the continuously variable transmission are not easily restricted by the third linkage mechanism, and the degree of freedom in arranging the parking brake operating tool and the continuously variable transmission is improved.

Furthermore, in the present invention,
The first series engaging mechanism is preferably composed of a rod.

  According to this characteristic configuration, by operating the speed change operation tool, the swash plate operating shaft can be changed to either the speed change range on one side or the other side by the push / pull operating force of the rod. In addition, regardless of whether the swash plate operating shaft is located in one of the shifting ranges on the other side, the swash plate operating shaft is returned to the neutral position, and the speed is changed by the push / pull operating force of the rod. The operating tool can be reliably returned to the neutral position.

Furthermore, in the present invention,
A cam mechanism attached to the swash plate operating shaft and guiding the swash plate operating shaft to a neutral position;
It is preferable that the third linkage mechanism is connected to the cam mechanism.

  According to this characteristic configuration, since the neutral position of the swash plate operation shaft is defined by the cam shape of the cam mechanism, the swash plate operation shaft can be reliably returned to the neutral position.

Furthermore, in the present invention,
The cam mechanism has a recessed portion that is recessed toward the swash plate operation shaft and is attached to the swash plate operation shaft, and the swash plate operation shaft is placed in the neutral position by entering the recessed portion. A second arm member that has a roller to be returned to and can swing around an axis parallel to the swash plate operation axis, and
It is preferable that the third linkage mechanism is connected to the second arm member.

  According to this characteristic configuration, when the second guide member is swung by the operating force of the third linkage mechanism, the roller enters the recessed portion of the first guide member, so that the swash plate operating shaft returns to the neutral position. With such a simple mechanism, the swash plate operating shaft can be reliably returned to the neutral position.

Furthermore, in the present invention,
The third linkage mechanism is composed of a cable wire,
The inner wire in the third linkage mechanism is preferably connected to the second arm member via a spring.

  According to this characteristic configuration, the operating force required to swing the second guide member can be simplified by adjusting the inner wire so that the spring has a specified length while the inner wire is pulled to the maximum extent. Can be managed.

Furthermore, in the present invention,
The second linkage mechanism is composed of a cable wire,
The third linkage mechanism is composed of a cable wire,
It is preferable that a support member is provided that supports a part on the parking brake operation tool side of the outer wire in the second linkage mechanism and a part on the parking brake operation tool side of the outer wire in the third linkage mechanism.

  According to this configuration, the end on the parking brake operating tool side of the outer wire in the second linkage mechanism and the end on the parking brake operating tool side of the outer wire in the third linkage mechanism are supported by the same support member. Therefore, the behaviors of the second linkage mechanism and the third linkage mechanism by the braking operation of the parking brake operating tool are easily matched. That is, it is easy to match the braking of the traveling device by the parking brake with the timing when the swash plate returns to the neutral position.

It is a left view which shows a self-desorption type combine. It is a top view which shows a self-desorption type combine. It is a figure which shows a transmission. It is a figure which shows a 1st linkage rod, a 2nd linkage cable wire, and a 3rd linkage mechanism, Comprising: It is a figure which shows the state by which the parking brake pedal is not depressed. It is a top view which shows a parking brake pedal and a 3rd linkage mechanism. (A) It is an enlarged front view which shows the 3rd linkage mechanism in the state of FIG. (B) It is an enlarged side view which shows the 3rd linkage mechanism in the state of FIG. (A) It is a figure which shows the state by which the trunnion axis | shaft is operated to the advance position. (B) It is a figure which shows the state by which the trunnion axis | shaft is operated to the reverse drive position. (C) It is a figure which shows the state by which the trunnion axis | shaft is returned to the neutral position. It is a figure which shows a 1st linkage rod, a 2nd linkage cable wire, and a 3rd linkage mechanism, Comprising: It is a figure which shows the state in which the parking brake pedal is depressed. (A) It is an enlarged front view which shows the 3rd linkage mechanism in the state of FIG. (B) It is an enlarged side view which shows the 3rd linkage mechanism in the state of FIG. It is a figure which shows the gauge attached to the 2nd linkage cable wire. It is sectional drawing which shows the state in which the drive sprocket is being fixed to the axle. It is a side view which shows the state which the crimping part is fitting in the groove part. It is an exploded sectional view showing the state where a nut is attached to an axle. It is a disassembled perspective view which shows the state in which a nut is attached to an axle shaft. (A) It is an enlarged front view which shows a 3rd linkage mechanism. (B) It is an enlarged side view which shows a 3rd linkage mechanism. (A) It is a figure which shows the state by which the trunnion axis | shaft is operated to the advance position. (B) It is a figure which shows the state by which the trunnion axis | shaft is operated to the reverse drive position. (C) It is a figure which shows the state by which the trunnion axis | shaft is returned to the neutral position. It is a figure which shows a 1st series connection rod, a 2nd connection cable wire, and a 3rd connection cable wire, Comprising: It is a figure which shows the state by which the parking brake pedal is not depressed. It is a figure which shows a 1st linkage rod, a 2nd linkage cable wire, and a 3rd linkage cable wire, Comprising: It is a figure which shows the state in which the parking brake pedal is depressed. (A) It is a figure which shows the state by which the trunnion axis | shaft is operated to the advance position. (B) It is a figure which shows the state by which the trunnion axis | shaft is operated to the reverse drive position. (C) It is a figure which shows the state by which the trunnion axis | shaft is returned to the neutral position. It is a figure which shows the gauge attached to the 2nd linkage cable wire.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated based on drawing.

[Overall configuration of self-removing combine]
1 and 2 show a self-removing combine as an example of a harvesting machine. This self-removable combiner includes a pair of left and right crawler type traveling devices 1 and a body frame 2 supported by the traveling device 1. At the front end of the machine body frame 2, there is provided a cutting unit 3 for cutting the planted cereal. An operation cabin 4 is provided behind the cutting unit 3. An engine 5 is provided below the operation cabin 4. Behind the driving cabin 4, a threshing device 6 for threshing the harvested cereal culm and a Glen tank 7 for storing the grain are provided adjacent to each other in the left-right direction.

  The traveling device 1 includes a drive sprocket 1a, a tension roller 1b, a wheel 1c, and a crawler belt 1d. Between the pair of left and right traveling devices 1, a transmission 8 for shifting the power from the engine 5 is provided.

  A driving seat 9 is provided in the driving cabin 4. A parking brake pedal 11 (corresponding to the “parking brake operation tool” according to the present invention) for operating the parking brake 10 (see FIG. 3) is provided below the driver's seat 9. The parking brake pedal 11 is configured to be held by a lock mechanism at a fully depressed position.

  A side panel 12 is provided on the left side of the driver seat 9. The side panel 12 is provided with a main transmission lever 14 (corresponding to a “main transmission operation tool” according to the present invention) for operating the continuously variable transmission 13 and various operation tools.

〔transmission〕
As shown in FIG. 3, the transmission 8 includes a hydraulic continuously variable transmission 13 for main transmission and a transmission case 15. The transmission case 15 includes a gear-type sub-transmission mechanism for sub-transmission, a steering transmission mechanism that can switch the airframe between a straight traveling state and a turning state, a parking brake 10 that can brake the traveling device 1, and various transmission shafts. Is housed. A pair of left and right axles 16 are provided at the lower portion of the mission case 15 so as to protrude outward from the lateral side surface of the mission case 15. A drive sprocket 1 a is fixed to the tip of the axle 16. After the power from the engine 5 is shifted by the continuously variable transmission 13 and the auxiliary transmission mechanism, the traveling device 1 is driven by being transmitted from the axle 16 to the drive sprocket 1a via the steering transmission mechanism.

[Parking brake]
The parking brake 10 is accommodated in the right side portion of the mission case 15. The parking brake 10 is configured to exert a braking force when the friction plate is pressed by a ball cam type pressing plate. When the parking brake 10 exhibits a braking force, the transmission shaft in the transmission case 15 to which the parking brake 10 is attached is braked.

  The parking brake 10 is provided with a parking brake arm 10a for operating the pressing plate. The parking brake arm 10a is configured to be swingable about an axis X1 extending in the left-right direction. The parking brake arm 10a is linked to the parking brake pedal 11 by a second linkage cable wire 17 (corresponding to a “second linkage mechanism” according to the present invention).

[Continuously variable transmission]
The continuously variable transmission 13 is attached to the upper right side of the mission case 15. The continuously variable transmission 13 includes a variable displacement hydraulic pump 18, a fixed displacement hydraulic motor 19, and a continuously variable transmission case 20 that houses the hydraulic pump 18 and the hydraulic motor 19.

  The hydraulic pump 18 includes a swash plate 21 that can change the swash plate angle, and a trunnion shaft 22 that is provided on the swash plate 21 and operates the swash plate angle of the swash plate 21 (corresponding to the “swash plate operating shaft” according to the present invention). ) And. By operating the swash plate angle of the swash plate 21 by the trunnion shaft 22, the rotation direction and the rotation speed of the hydraulic motor 19 are changed steplessly.

  As shown in FIG. 4, the trunnion shaft 22 is supported by the continuously variable transmission case 20 so as to be rotatable about an axis Y1 extending in the front-rear direction. The trunnion shaft 22 is provided so as to protrude forward from the front surface of the continuously variable transmission case 20. An intermediate portion of a trunnion lever 26 (corresponding to an “arm member” according to the present invention) is fixed to the tip end portion of the trunnion shaft 22 so as not to be relatively rockable. The trunnion shaft 22 is urged to a neutral position by a neutral urging mechanism 23. The trunnion shaft 22 is linked to the main transmission lever 14 by a first linkage rod 24 (corresponding to a “first linkage mechanism” according to the present invention), and linked to the parking brake pedal 11 by a third linkage mechanism 25. Yes.

[Main transmission lever]
The main transmission lever 14 is configured to be swingable forward and backward about the axis X2 extending in the left-right direction across the neutral position. The main transmission lever 14 is supported on the driving cabin 4 side, for example, a frame that supports the side panel 12. A main transmission lever arm 14 a is fixed to the base end portion of the main transmission lever 14 so as not to be relatively rockable.

[Parking brake pedal]
As shown in FIGS. 4 and 5, the parking brake pedal 11 is connected to a support shaft 11b that can be rotated about an axis X3 along the left-right direction of the machine body, and is integrated with the support shaft 11b around the axis X3. Is configured to be swingable. The parking brake pedal 11 is supported by the body frame 2. A parking brake pedal arm 11 a is fixed to the base end portion of the parking brake pedal 11 so as not to be relatively rockable. The left end portion of the support shaft 11 b is supported by the transmission case 15 via the stay 38, and the right end portion of the support shaft 11 b is supported by the floor deck of the operation cabin 4.

[First series rod]
As shown in FIG. 4, the end of the first transmission rod 24 on the main transmission lever 14 side is connected to the tip of the main transmission lever arm 14a. The end of the first series of connecting rods 24 on the trunnion shaft 22 side is connected to the tip of the trunnion lever 26.

[Second linkage cable wire]
The end of the inner wire 17a of the second linkage cable wire 17 on the parking brake pedal 11 side is attached to the tip of the parking brake pedal arm 11a via a fixture 17c. Of the outer wire 17 b in the second linkage cable wire 17, the end on the parking brake pedal 11 side is supported by the support stay 29. The support stay 29 is fixed to the body frame 2, for example.

  The end of the inner wire 17a of the second linkage cable wire 17 on the parking brake 10 side is connected to the tip of the parking brake arm 10a via a spring 17d. The end portion on the parking brake 10 side of the outer wire 17 b in the second linkage cable wire 17 is supported by the support stay 30. The support stay 30 is fixed to the transmission 8, for example.

[Third linkage mechanism]
As shown in FIGS. 4 and 6, the third linkage mechanism 25 includes an engagement claw 35 (corresponding to “first engagement portion” and “engagement member” according to the present invention) on the parking brake pedal 11 side, The first operation member 36 and the second operation member 37 on the trunnion shaft 22 side, and the trunnion lever 26 (corresponding to the “arm member” according to the present invention) are provided. A combination of the first operating member 36 and the second operating member 37 and the trunnion lever 26 corresponds to a “second engaging portion” according to the present invention.

  The engaging claw 35 is fixed to the support shaft 11b so as to protrude toward the continuously variable transmission 13 (rear side) in the radially outward direction, and can swing around the shaft center X3 integrally with the support shaft 11b. It is configured. The engagement claw 35 is constituted by, for example, a round bar. A bending portion 35 a that bends upward is formed at the tip of the engaging claw 35.

  The first operating member 36 and the second operating member 37 are connected to locations on both sides of the trunnion lever 26 with the trunnion shaft 22 in between. The first operation member 36 and the second operation member 37 have a symmetric structure with respect to the trunnion shaft 22.

  The first operating member 36 includes a first plate portion 36a on the engagement claw 35 side and a first rod portion 36b on the trunnion lever 26 side, and the first plate portion 36a and the first rod portion 36b are connected to each other. Has been configured. The 1st plate part 36a and the 1st rod part 36b may be connected so that length adjustment is possible by screw structure. A first long hole 36c extending along the longitudinal direction is formed in the first plate portion 36a. The first rod portion 36b is supported on a portion of the trunnion lever 26 on one side with respect to the trunnion shaft 22 so as to be swingable via a first swing shaft 36d.

  The second operation member 37 has a second plate portion 37a on the engagement claw 35 side and a second rod portion 37b on the trunnion lever 26 side, and the second plate portion 37a and the second rod portion 37b are connected to each other. Has been configured. The 2nd plate part 37a and the 2nd rod part 37b may be connected so that length adjustment is possible by screw structure. A second long hole 37c extending along the longitudinal direction is formed in the second plate portion 37a. The second rod portion 37b is supported on the other side of the trunnion lever 26 with respect to the trunnion shaft 22 so as to be swingable via a second swing shaft 37d.

  The engaging claw 35 is inserted into the first long hole 36c and the second long hole 37c in a state where the first long hole 36c and the second long hole 37c are overlapped. When the parking brake pedal 11 is not braked, the engaging claw 35, the first long hole 36c, and the second long hole 37c are relatively movable, and the operation of the trunnion lever 26 and the like is hindered. Absent.

[Linking operation with the first series of connecting rods]
In FIG. 4, when the main transmission lever 14 is swung forward, the first series connecting rod 24 is pushed down by the main transmission lever arm 14 a that rocks constantly with the main transmission lever 14. As a result, as shown in FIG. 7A, the trunnion lever 26 is swung to the forward side integrally with the trunnion shaft 22. At this time, since the first long hole 36c moves relative to the engaging claw 35, the operation of the trunnion lever 26 and the like is not hindered. Thus, the trunnion lever 26 is operated to the forward side via the first series of connecting rods 24 by the operation of the main transmission lever 14 to the forward side, and the position of the trunnion shaft 22 is changed to the forward side. Thereby, the swash plate angle of the swash plate 21 of the hydraulic pump 18 is operated forward by the trunnion shaft 22.

  In FIG. 4, when the main transmission lever 14 is swung backward, the first transmission rod 24 is pulled up by the main transmission lever arm 14 a that swings integrally with the main transmission lever 14. As a result, as shown in FIG. 7B, the trunnion lever 26 swings backward with the trunnion shaft 22 integrally. At this time, since the second long hole 37c moves relative to the engaging claw 35, the operation of the trunnion lever 26 and the like is not hindered. Thus, the trunnion lever 26 is operated to the reverse side via the first series of connecting rods 24 by the operation of the main transmission lever 14 to the reverse side, and the position of the trunnion shaft 22 is changed to the reverse side. Thereby, the swash plate angle of the swash plate 21 of the hydraulic pump 18 is operated backward by the trunnion shaft 22.

[Linkage operation with the second linkage cable wire]
As shown in FIG. 8, when the parking brake pedal 11 is depressed, the inner wire 17 a in the second linkage cable wire 17 is pulled by the parking brake pedal arm 11 a that swings integrally with the parking brake pedal 11. At that time, since the engaging claw 35 moves relative to the first long hole 36c and the second long hole 37c, the braking operation of the parking brake pedal 11 is not hindered (see FIG. 9). Thus, when the parking brake arm 10a is swung to the braking side, the parking brake 10 exhibits a braking force.

  When the depression of the parking brake pedal 11 is released, the inner wire 17a in the second linkage cable wire 17 is loosened by the parking brake pedal arm 11a that swings integrally with the parking brake pedal 11. Thus, the parking brake arm 10a is swung to the release side, whereby the braking force of the parking brake 10 is released.

  Here, in a state where the parking brake pedal 11 is held by the lock mechanism at the maximum depressed position, that is, the inner wire 17a in the second linkage cable wire 17 is pulled to the maximum, the spring 17d has a specified length. Thus, by adjusting the inner wire 17a in the second linkage cable wire 17, the operation force required to swing the parking brake arm 10a to the braking side can be easily managed.

  As shown in FIG. 10, a gauge 39 is fixed to an end of the inner wire 17 a of the second linkage cable wire 17 on the spring 17 d side. The gauge 39 is formed separately from the spring 17d. A stay 40 that supports the gauge 39 is fixed to an end of the spring 17d on the parking brake arm 10a side. The stay 40 is formed with an insertion hole 40a through which the gauge 39 is inserted, and the tip of the gauge 39 protrudes from the insertion hole 40a. Thereby, even without a measuring tool such as a caliper or a scale, the inner wire 17a in the second linkage cable wire 17 can be adjusted while visually checking that the stay 40 is positioned within the range of the mark 39a of the gauge 39. .

[Cooperation by third linkage mechanism]
As shown in FIG. 7A, in the state where the trunnion shaft 22 is located at the forward movement position, the engaging claw 35 is located at the end of the first long hole 36c opposite to the trunnion lever 26. Yes. Then, when the parking brake pedal 11 is braked and the engaging claw 35 swings upward around the axis X3 integrally with the support shaft 11b, the engaging claw 35 moves to the trunnion lever 26 in the first long hole 36c. Engage from the lower side to the opposite end to move upward along the second long hole 37c.

  As a result, the first operating member 36 is pulled up, pulls on one side of the trunnion lever 26 with respect to the trunnion shaft 22, and the trunnion lever 26 swings from the forward position to the neutral position. Finally, as shown in FIG. 7 (c), the engaging claw 35 is opposite to the trunnion lever 26 in the second elongated hole 37c and the end of the first elongated hole 36c on the side opposite to the trunnion lever 26. When located at the end on the side, the trunnion shaft 22 is in a neutral position.

  Then, as the trunnion shaft 22 is returned to the neutral position, the first series engaging rod 24 is pushed up by the trunnion lever 26. As a result, the main transmission lever 14 swings integrally with the main transmission lever arm 14a toward the neutral side. Thus, the main transmission lever 14 is returned from the forward side to the neutral position.

  Further, as shown in FIG. 7B, in the state where the trunnion shaft 22 is located at the reverse movement position, the engagement claw 35 is located at the end of the second long hole 37c opposite to the trunnion lever 26. doing. Then, when the parking brake pedal 11 is braked and the engaging claw 35 swings upward around the axis X3 integrally with the support shaft 11b, the engaging claw 35 moves to the trunnion lever 26 in the second long hole 37c. Engage from the lower side to the opposite end to move upward along the first long hole 36c.

  As a result, the second operating member 37 is pulled up and pulls on the other side of the trunnion lever 26 with respect to the trunnion shaft 22, and the trunnion lever 26 swings from the reverse position to the neutral position. Finally, as shown in FIG. 7 (c), the engaging claw 35 is opposite to the trunnion lever 26 in the second elongated hole 37c and the end of the first elongated hole 36c on the side opposite to the trunnion lever 26. When located at the end on the side, the trunnion shaft 22 is in a neutral position.

  Then, as the trunnion shaft 22 is returned to the neutral position, the first series engaging rod 24 is pulled down by the trunnion lever 26. As a result, the main transmission lever 14 swings integrally with the main transmission lever arm 14a toward the neutral side. Thus, the main transmission lever 14 is returned to the neutral position from the reverse side.

  As described above, when the parking brake pedal 11 is not braked, the engagement between the engagement claw 35 and the first operation member 36 and the second operation member 37 is released. When the parking brake pedal 11 is braked, the engaging claw 35 and the first operating member 36 (or the second operating member 37) are engaged, and the parking brake pedal 11 and the trunnion shaft 22 are linked. Will do.

  Further, as described above, since the curved portion 35a is formed at the tip of the engagement claw 35, the engagement claw 35 is difficult to be removed from the first long hole 36c and the second long hole 37c, and the first The end of the one long hole 36c opposite to the trunnion lever 26 and the end of the first long hole 36c opposite to the trunnion lever 26 are equally applied.

[Neutral biasing mechanism]
As shown in FIG. 6, the neutral biasing mechanism 23 includes a positioning arm 27 and a biasing spring 41.

  The positioning arm 27 is configured to be swingable about an axis Y2 extending in the front-rear direction parallel to the trunnion shaft 22 (axis Y1). The positioning arm 27 is provided with a roller 27a that can enter the recessed portion 26a on the trunnion lever 26 side.

  The urging spring 41 urges the positioning arm 27 to swing around the axis Y2 toward the trunnion lever 26. One end of the biasing spring 41 is locked to the positioning arm 27, and the other end of the biasing spring 41 is locked to the continuously variable transmission case 20.

  As a result, the positioning arm 27 is swung toward the trunnion lever 26 around the axis Y2 by the biasing force of the biasing spring 41, and the roller 27a enters the recess 26a, whereby the trunnion shaft 22 is positioned at the neutral position. The

  Here, as shown in FIG. 6, the base end portion of the positioning arm 27 is supported by the continuously variable transmission case 20 via the neutral position adjusting mechanism 32. The neutral position adjusting mechanism 32 is configured to be able to adjust the position of the axis Y2 of the positioning arm 27.

  As described above, when the roller 27a enters the recessed portion 26a, the trunnion shaft 22 is positioned at the neutral position, and the trunnion shaft 22 is shifted from the neutral position to the neutral position defined by the roller 27a and the recessed portion 26a. May occur. Therefore, by adjusting the position of the axis Y2 of the positioning arm 27 by the neutral position adjusting mechanism 32, the entry position of the roller 27a with respect to the recessed portion 26a can be changed. Thereby, the shift | offset | difference of the neutral position of the trunnion shaft 22 and the neutral position prescribed | regulated by the roller 27a and the recessed part 26a can be corrected.

[Fixing the drive sprocket to the axle]
As shown in FIGS. 11 and 12, the drive sprocket 1 a is fixed by a nut 33 in a state in which the drive sprocket 1 a is fitted to the tip end portion of the axle 16 so as not to be relatively rotatable.

  A thin-walled annular plate portion 34 is provided at the tip of the nut 33. The annular plate portion 34 is formed in a substantially annular shape whose inner diameter matches the inner diameter of the nut 33. A plurality of crimping portions 34 a are formed in the annular plate portion 34 by slits. The plurality of crimping portions 34 a are formed with twelve crimping portions 34 a at equal angular intervals around the axis of the nut 33, for example, at intervals of 30 degrees.

  A male screw portion 16 b corresponding to the nut 33 is formed at the tip of the axle 16. A plurality of, for example, two grooves 16 a are formed on the front end surface of the axle 16. The two groove portions 16a are formed, for example, in a state where the crossing angle is 75 degrees (in other words, 105 degrees). The groove portion 16 a is formed in a state in which the center thereof passes through the axis of the axle 16 in a side view and extends to one side and the other side of the outer peripheral surface of the axle 16. The width of the groove 16a is set so as to match the width of the caulking portion 34a.

  As shown in FIGS. 13 and 14, the nut 33 is fastened to the front end portion of the axle 16 in a state where the drive sprocket 1 a is fitted to the front end portion of the axle 16 so as not to be relatively rotatable. Of the twelve crimping portions 34a, the crimping portion 34a that is in phase with the groove portion 16a on the axle 16 side is bent so as to fit into the groove portion 16a. Thereby, the nut 33 can be prevented from loosening. At that time, by using only one caulking part 34a for the current locking, out of the caulking part 34a in phase with the one end part of the groove part 16a and the caulking part 34a in phase with the other end part of the groove part 16a, The other caulking portion 34a can be used for the next loosening prevention.

  Here, there is a conventional method of locking with two nuts. In this case, the nut needs to be fastened twice, and the length of the male screw portion on the axle 16 side is also a length corresponding to the two nuts. It is necessary to. In this respect, according to the above configuration, the nut 33 can be fastened once and the length of the male screw portion on the axle 16 side can be shortened. Further, since it is possible to grasp at a glance whether or not the loosening has been made depending on whether the caulking portion 34a is bent or not, visual management is easy.

  Further, as described above, the crossing angle of the groove 16a is set to 75 degrees, and the caulking portions 34a are formed at intervals of 30 degrees, but the crossing angle 75 degrees of the groove 16a is the interval between the caulking portions 34a. It is a 15 degree difference for a multiple of 30 degrees. Therefore, even if the caulking portion 34a is displaced with respect to the groove portion 16a, there is always a caulking portion 34a in which the deviation is within a range of 7.5 degrees, and thus adjustment is easy.

[Second Embodiment]
Next, 2nd embodiment is described using FIG.15 and FIG.16. In addition, since the member of the same code | symbol as 1st embodiment is a structure substantially the same as 1st embodiment, detailed description is abbreviate | omitted.

[Third linkage mechanism]
As shown in FIG. 15, the third linkage mechanism 125 includes a first operating member 136 and a second operating member 137, an end of the first operating member 136 opposite to the trunnion lever 26, and a second The end of the operation member 137 opposite to the trunnion lever 26 is connected so as to form a recessed portion 125 a that is recessed on the side away from the trunnion shaft 22. A combination of the first operating member 136 and the second operating member 137 and the trunnion lever 26 corresponds to the “second engaging portion” according to the present invention.

  The first operation member 136 and the second operation member 137 are configured by combining a plurality of plate-like members, and form a substantially diagonal shape with the trunnion lever 26 in front view. A recessed portion 125 a is formed in the upper part of the inner side formed by the first operating member 136, the second operating member 137, and the trunnion lever 26. The first operating member 136 and the second operating member 137 are connected to portions of the trunnion lever 26 located on both sides of the trunnion shaft 22. The first operating member 136 and the second operating member 137 have a symmetrical structure with respect to the trunnion shaft 22.

  The first operating member 136 has a first inclined portion 136a and a first extending portion 136b. The first extending portion 136b is fixed to a portion of the trunnion lever 26 on one side with respect to the trunnion shaft 22 through a first fixed shaft 136c so as not to be relatively rockable. The first extending portion 136b extends so as to be perpendicular to a straight line L1 passing through the axis of the first fixed shaft 136c and the axis Y1 when viewed from the front.

  The 1st inclination part 136a is being fixed to the edge part on the opposite side to the trunnion lever 26 among the 1st extension parts 136b. The first inclined portion 136a is inclined so as to approach the second operating member 137 side toward the end opposite to the first extending portion 136b in a front view.

  The second operating member 137 has a second inclined portion 137a and a second extending portion 137b. The second extending portion 137b is fixed to the other side portion of the trunnion lever 26 with respect to the trunnion shaft 22 through a second fixed shaft 137c so as not to be relatively swingable. The second extending portion 137b extends so as to be perpendicular to a straight line L1 passing through the axis of the second fixed shaft 137c and the axis Y1 when viewed from the front.

  The 2nd inclination part 137a is being fixed to the edge part on the opposite side to the trunnion lever 26 among the 2nd extension parts 137b. The second inclined portion 137a is inclined so that the end opposite to the second extending portion 137b is closer to the first operating member 136 side in a front view.

  The end of the first inclined portion 136a opposite to the first extending portion 136b and the end of the second inclined portion 137a opposite to the second extending portion 137b are fixed by the bolts 42. ing. A recessed portion 125a that is recessed on the side away from the trunnion shaft 22 is formed, and the engaging claw 35 is disposed in the recessed portion 125a. The deepest portion of the recessed portion 125a is positioned on the center portion between the first operating member 136 and the second operating member 137, that is, on the straight line L2 that passes through the axis Y1 and is perpendicular to the straight line L1. Is set to

[Cooperation by third linkage mechanism]
As shown in FIG. 16A, when the trunnion lever 26 is swung forward by the first connecting rod 24, the first operation member 136 and the second operation member 137 are integrally moved forward with the trunnion lever 26. Is swung. In the state where the trunnion shaft 22 is located at the forward movement position, the engaging claw 35 is located near the connecting portion between the second inclined portion 137a and the second extending portion 137b in the recessed portion 125a.

  When the parking brake pedal 11 is braked and the engaging claw 35 swings upward around the axis X3 integrally with the support shaft 11b, the engaging claw 35 is engaged with the second inclined portion 137a from the lower side. In combination, the second inclined portion 137a is slidably guided along the recessed shape of the recessed portion 125a. As a result, the trunnion lever 26 swings from the forward position to the neutral position side. Finally, as shown in FIG. 16C, when the engaging claw 35 is located at the deepest portion of the recessed portion 125a, the trunnion shaft 22 becomes the neutral position.

  Further, as shown in FIG. 16B, when the trunnion lever 26 is swung back by the first connecting rod 24, the first operation member 136 and the second operation member 137 are integrated with the trunnion lever 26. It is swung backward. In the state where the trunnion shaft 22 is located at the reverse movement position, the engaging claw 35 is located near the connection portion between the first inclined portion 136a and the first extending portion 136b in the recessed portion 125a.

  When the parking brake pedal 11 is braked and the engaging claw 35 swings upward around the axis X3 integrally with the support shaft 11b, the engaging claw 35 engages with the first inclined portion 136a from below. Together, the first inclined portion 136a is slidably guided along the recessed shape of the recessed portion 125a. As a result, the trunnion lever 26 swings from the reverse position to the neutral position side. Finally, as shown in FIG. 16C, when the engaging claw 35 is located at the deepest portion of the recessed portion 125a, the trunnion shaft 22 becomes the neutral position.

[Third embodiment]
Next, a third embodiment will be described with reference to FIGS. In addition, since the member of the same code | symbol as 1st embodiment is a structure substantially the same as 1st embodiment, detailed description is abbreviate | omitted.

[Cam mechanism]
As shown in FIG. 17, a cam mechanism 223 that guides the trunnion shaft 22 to the neutral position is provided at the tip of the trunnion shaft 22. The cam mechanism 223 includes a trunnion lever 226 (corresponding to a “first arm member” according to the present invention) and a neutral return arm 227 (corresponding to a “second arm member” according to the present invention).

  The trunnion lever 226 is fixed to the tip end portion of the trunnion shaft 22 so as not to be relatively rockable. A cam portion 28 that can come into contact with the neutral return arm 227 (roller 227a) is provided on a portion of the trunnion lever 226 that faces the neutral return arm 227. The cam portion 28 is formed with a recessed portion 28a that is recessed toward the trunnion shaft 22, and a first guide portion 28b and a reverse guide portion 28c with the recessed portion 28a interposed therebetween.

  The neutral return arm 227 is configured to be swingable about an axis Y2 extending in the front-rear direction parallel to the trunnion shaft 22 (axis Y1). The neutral return arm 227 is provided with a roller 227a that can enter the recess 28a. When the roller 227a enters the recessed portion 28a, the trunnion shaft 22 is returned to the neutral position.

[Third linkage cable wire]
As shown in FIG. 17, the parking brake pedal 11 and the trunnion shaft 22 are linked by a third linkage cable wire 225 (corresponding to a “third linkage mechanism” according to the present invention). The third linkage cable wire 225 is configured separately from the first linkage rod 24 and the second linkage cable wire 17. The end portion on the parking brake pedal 11 side of the inner wire 225a in the third linkage cable wire 225 is attached to the distal end portion of the parking brake pedal arm 11a via the fixture 225c. Of the outer wire 225b of the third linkage cable wire 225, the end on the parking brake pedal 11 side is supported by a support stay 29 (corresponding to a “support member” according to the present invention). That is, the end portion on the parking brake pedal 11 side of the outer wire 225 b in the third linkage cable wire 225 and the end portion on the parking brake pedal 11 side in the outer wire 17 b of the second linkage cable wire 17 are the same support stay 29. It is supported by.

  The end of the inner wire 225a of the third linkage cable wire 225 on the trunnion shaft 22 side is connected to the tip of the neutral return arm 227 via a spring 225d. Of the outer wire 225 b in the third linkage cable wire 225, the end portion on the trunnion shaft 22 side is supported by the support stay 31. For example, the support stay 31 is fixed to the continuously variable transmission case 20.

  Here, in a state where the parking brake pedal 11 is held by the lock mechanism at a position where the parking brake pedal 11 is fully depressed, that is, in a state where the inner wire 225a of the third linkage cable wire 225 is pulled to the maximum, the spring 225d has a predetermined length. Thus, by adjusting the inner wire 225a in the third linkage cable wire 225, the operating force required to swing the neutral return arm 227 to the ON side can be easily managed.

[Linkage operation with third linkage cable wire]
When the parking brake pedal 11 is depressed as shown in FIG. 18 with the main transmission lever 14 being swung forward, a parking brake pedal arm 11a that swings integrally with the parking brake pedal 11 is operated. As a result, the inner wire 225a of the third linkage cable wire 225 is pulled. Then, the state shown in FIG. 19 (a) is changed to the state shown in FIG. 19 (b). At this time, the roller 227a is moved to the first guide portion as the neutral return arm 227 is swung to the ON side. The cam portion 28 is pushed while moving from above 28b into the recessed portion 28a. As a result, the trunnion lever 226 swings integrally with the trunnion shaft 22 toward the neutral side, and the roller 227a enters the recessed portion 28a, whereby the trunnion shaft 22 is returned to the neutral position.

  Then, as the trunnion shaft 22 is returned to the neutral position, the first series engaging rod 24 is pushed up by the trunnion lever 226. As a result, the main transmission lever 14 swings integrally with the main transmission lever arm 14a toward the neutral side. Thus, the main transmission lever 14 is returned from the forward side to the neutral position.

  Further, when the parking brake pedal 11 is depressed as shown in FIG. 18 with the main transmission lever 14 being swung to the reverse side, the parking brake pedal that swings integrally with the parking brake pedal 11 is operated. The inner wire 225a in the third linkage cable wire 225 is pulled by the arm 11a. Then, the state shown in FIG. 19B is changed to the state shown in FIG. 19C. At this time, the roller 227a is moved backward as the neutral return arm 227 is swung to the ON side. The cam portion 28 is pushed while moving from above 28c into the recessed portion 28a. As a result, the trunnion lever 226 swings integrally with the trunnion shaft 22 toward the neutral side, and the roller 227a enters the recessed portion 28a, whereby the trunnion shaft 22 is returned to the neutral position.

  Then, as the trunnion shaft 22 is returned to the neutral position, the first series engaging rod 24 is pulled down by the trunnion lever 226. As a result, the main transmission lever 14 swings integrally with the main transmission lever arm 14a toward the neutral side. Thus, the main transmission lever 14 is returned to the neutral position from the reverse side.

[Another embodiment]
(1) In the above embodiment, the “parking brake operating tool” is configured by the parking brake pedal 11, but may be configured by a parking brake lever.

(2) In the above embodiment, the gauge 39 is formed separately from the spring 17d. However, as shown in FIG. 20, the gauge 17e may be formed integrally with the spring 17d. As shown in FIG. 20, the gauge 17 e is formed such that an end of the spring 17 d on the inner wire 17 a side is bent toward the parking brake arm 10 a side and is extended so as to protrude from the insertion hole 40 a of the stay 40. Yes.

(3) In the first and second embodiments, the first operating member 36 (136) and the second operating member 37 (137) have a symmetric structure with respect to the trunnion shaft 22. It is not limited to. That is, if the trunnion shaft 22 can be returned to the neutral position by the braking operation of the parking brake pedal 11, the first operation member 36 (136) and the second operation member 37 (137) And an asymmetric structure.

(4) Although the neutral urging mechanism 23 is provided in the first and second embodiments, it may not be provided.

(5) In the first embodiment, the engaging claw 35 engages from the lower side with the end of the first long hole 36c (or the second long hole 37c) opposite to the trunnion lever 26 from the lower side. Although the lever 26 is configured to be operated, the present invention is not limited to this. That is, the engaging claw 35 is configured to be engaged with the end portion of the first long hole 36c (or the second long hole 37c) on the trunnion lever 26 side from above so that the trunnion lever 26 is operated. Also good.

(6) In the second embodiment, the deepest portion of the recessed portion 125a is set to be positioned on the center portion between the first operation member 136 and the second operation member 137, that is, on the straight line L2. However, the present invention is not limited to this. That is, if it is possible to return the trunnion shaft 22 to the neutral position by the braking operation of the parking brake pedal 11, the deepest portion of the recessed portion 125a is the center between the first operating member 136 and the second operating member 137. Part, i.e., the straight line L <b> 2, may be set at a position offset to either one of the first operation member 136 and the second operation member 137.

(7) In the third embodiment, the inner wire 225a in the third linkage cable wire 225 is connected to the neutral return arm 227 via the spring 225d, but may be directly connected to the neutral return arm 227.

(8) In the third embodiment, the end portion on the parking brake pedal 11 side of the outer wire 225b of the third linkage cable wire 225 and the end portion on the parking brake pedal 11 side of the outer wire 17b of the second linkage cable wire 17 Is supported by the same support stay 29, but these may be supported by separate support stays.

  The present invention can be used not only for a self-removing combine, but also for an ordinary combine, a corn harvester, a carrot harvester and the like.

1 traveling device 10 parking brake 11 parking brake pedal (parking brake operating tool)
11b Support shaft 13 Continuously variable transmission 14 Main transmission lever (transmission operation tool)
17 Second linkage cable wire (second linkage mechanism)
21 Swash plate 22 Trunnion shaft (swash plate operation shaft)
24 1st engagement rod (1st engagement mechanism)
25 Third linkage mechanism 26 Trunnion lever (arm member)
27 Neutral return arm 27 (second arm member)
27a Roller 28a Recessed portion 29 Support stay (support member)
35 engaging claw (first engaging portion, engaging member)
36 1st operation member 36c 1st long hole 37 2nd operation member 37c 2nd long hole 123 Cam mechanism 125 3rd linkage mechanism 125a Recessed part 136 1st operation member 137 2nd operation member 225 3rd linkage cable wire (3rd Linkage mechanism)
225d Spring 226 Trunnion lever (first arm member)
Y2 axis

Claims (13)

A continuously variable transmission comprising: a swash plate capable of changing a swash plate angle; and a swash plate operating shaft provided on the swash plate and operating a swash plate angle of the swash plate;
A transmission operating tool for operating the continuously variable transmission;
A parking brake capable of braking the traveling device;
A parking brake operating tool for operating the parking brake;
A first linkage mechanism that links the shift operation tool and the swash plate operation shaft;
A second linkage mechanism that links the parking brake operation tool and the parking brake;
It is configured separately from the first linkage mechanism and the second linkage mechanism, and is provided across the parking brake operation tool and the swash plate operation shaft, and the swash plate operation shaft is moved by a braking operation of the parking brake operation tool. And a third linkage mechanism for returning to the neutral position.   The harvesting machine according to claim 1, wherein the third linkage mechanism links the parking brake operating tool and the swash plate operating shaft when the parking brake operating tool is braked.   The third linkage mechanism includes a first engagement portion on the parking brake operation tool side and a second engagement portion on the swash plate operation shaft side, and the parking brake operation tool is braked. The harvesting machine according to claim 2, wherein the first engagement portion and the second engagement portion are engaged to link the parking brake operation tool and the swash plate operation shaft.   The harvester according to claim 3, wherein the third linkage mechanism releases the engagement between the first engagement portion and the second engagement portion when the parking brake operation tool is not braked. The parking brake operation tool is connected to a support shaft that is rotatable about an axis along the left-right direction of the machine body, and is configured to be swingable around the axis integrally with the support shaft.
The first engaging portion is formed by an engaging member that is provided on the support shaft so as to protrude in a radially outward direction, and is capable of swinging around the shaft center integrally with the support shaft.
The second engaging portion includes an arm member having an intermediate portion fixed to the swash plate operation shaft, and a pair of operation members connected to positions located on both sides of the arm member with the swash plate operation shaft interposed therebetween. And having
The harvester according to claim 3 or 4, wherein the engaging member and the pair of operating members are configured to be engageable with each other. One operation member of the pair of operation members is swingably supported on a portion of the arm member on one side with respect to the swash plate operation shaft,
The other operating member of the pair of operating members is swingably supported by the other side of the arm member with respect to the swash plate operating shaft,
A first elongated hole extending along the longitudinal direction is formed in the one operation member,
A second elongated hole extending along the longitudinal direction is formed in the other operation member,
In a state where the first long hole and the second long hole are overlapped, the engagement member is inserted into the first long hole and the second long hole,
By the braking operation of the parking brake operating tool, either the end of the first long hole opposite to the arm member and the end of the second long hole opposite to the arm member, The engagement member is engaged and the arm member is operated, and the engagement member is an end of the first long hole opposite to the arm member and the arm member of the second long hole. The swash plate operating shaft is in a neutral position,
When the parking brake operating tool is not braked, the engaging member, the first elongated hole, and the second elongated hole are relatively movable, and the first interlock mechanism is operated by operating the speed change operating tool. The harvesting machine according to claim 5, wherein the position of the swash plate operating shaft is changed by operating the arm member. The parts on the opposite side of the arm member of the pair of operation members are connected so as to form a recessed portion that is recessed on the side away from the swash plate operation shaft,
The engaging member is disposed in the recessed portion,
By the braking operation of the parking brake operating tool, the engagement member is slidably guided to the operation member along the recessed shape of the recessed portion, and the arm member is operated, and the engaging member is moved to the recessed portion. The harvesting machine according to claim 5, wherein the swash plate operating shaft is in a neutral position when positioned at the deepest portion.   The harvesting machine according to claim 1, wherein the third linkage mechanism is configured by a cable wire. A cam mechanism attached to the swash plate operating shaft and guiding the swash plate operating shaft to a neutral position;
The harvesting machine according to claim 8, wherein the third linkage mechanism is connected to the cam mechanism. The cam mechanism has a recessed portion that is recessed toward the swash plate operation shaft and is attached to the swash plate operation shaft, and the swash plate operation shaft is placed in the neutral position by entering the recessed portion. A second arm member that has a roller to be returned to and can swing around an axis parallel to the swash plate operation axis, and
The harvesting machine according to claim 9, wherein the third linkage mechanism is connected to the second arm member. The third linkage mechanism is composed of a cable wire,
The harvester according to claim 10, wherein the inner wire in the third linkage mechanism is connected to the second arm member via a spring. The second linkage mechanism is composed of a cable wire,
The third linkage mechanism is composed of a cable wire,
Any of Claims 8-11 provided with the supporting member which supports the part by the side of the parking brake operation tool among the outer wires in the 2nd linkage mechanism, and the part by the side of the parking brake operation tool among the outer wires in the 3rd linkage mechanism. A harvesting machine according to claim 1.   The harvester according to any one of claims 1 to 12, wherein the first series engagement mechanism is configured by a rod.

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