JP2003291677A - Shift operating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shift operating device whereby shift operation is lightly performed, and operation capacity or an operation position of a shift lever can be easily sensed while a continuously variable transmission is maintained at the operation position against neutral returning force by giving moving resistance to the shift lever by a positioning mechanism. <P>SOLUTION: The shift lever 13 swings to a direction different from a shift direction from a stopping state wherein a fitting member 36 is fitted in positioning recessed parts 33 and 35 of a positioning member 31, and a shifting state wherein the fitting member 36 comes out of the positioning recessed parts 33 and 35. When the shift lever 13 is operated to be in the shifting state, the shift lever 13 is operated to the shift direction and shift operation of the continuously variable transmission is allowed. As the shift lever 13 is operated to the shift direction, a fixed side click member 41 and a movable side click member 43 rub against each other and are vibrated and operated. When the shift lever 13 is switched to the stopping state, the shift lever 13 is fitted into the operation position by the positioning member 31 so that the continuously variable transmission is not returned to the neutral state. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear shift operating device including a gear shift lever which is interlocked with an operating portion of a continuously variable transmission.

[0002]

2. Description of the Related Art In a hydrostatic continuously variable transmission, an operating force for returning an operating portion to a neutral position is generated due to a driving reaction force of a hydraulic pump. In this way, in the continuously variable transmission, regardless of the type such as hydraulic type or belt type,
It has a restoring force to return the operation part to the neutral position. Therefore, in the above-described speed change operation device, conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-173779, a positioning mechanism including a positioning member having a plurality of recesses and a locking body engaging with and disengaging from the recesses. Or a friction-type position holding means as a positioning mechanism including a positioning member as a fixed-side friction member and a movable-side friction member attached to a speed change lever. The stop type position holding means provides movement resistance to the shift lever by engaging the locking body with the recess of the positioning member, or the friction type position holding means connects the movable side friction member and the positioning member. By applying a movement resistance to the shift lever by friction, the operating portion of the continuously variable transmission is maintained in the operating position against the restoring force thereof. It had.

[0003]

In the above-mentioned conventional locking type position holding means, the gear shift lever is operated in the operating direction for operating the operating portion of the continuously variable transmission when performing the gear shifting operation. Then, the locking body is disengaged from the concave portion of the positioning member for the lever operation for the gear shift operation, thereby enabling the operation portion of the continuously variable transmission to be operated. Further, in the above-mentioned conventional frictional position holding means, when the gear shift lever is operated in the operation direction for operating the operating portion of the continuously variable transmission, the gear change operation is performed. When the movable side friction member slides with respect to the fixed side friction member for the lever operation, the operation portion of the continuously variable transmission can be operated. Therefore, regardless of whether the positioning mechanism is of the locking type or the friction type, conventionally, at the time of gear shifting operation, the gear shift lever must be operated against the operation resistance given by the positioning mechanism. Was getting heavy.

It is an object of the present invention to allow a continuously variable transmission to be switched and maintained simply by operating a gearshift lever, yet to perform a light gearshift operation and to easily recognize a gearshift operation amount. To provide.

[0005]

The constitution, action and effect of the invention according to claim 1 are as follows.

[Structure] In a gear shift operating device including a gear shift lever interlockingly connected to an operating portion of a continuously variable transmission, the gear shift lever is in a gear shifting state for operating the operating portion, and the operating portion. Is configured to be freely switchable to a stop state for maintaining the operating position, and the shift lever is provided with movement resistance so as to maintain the operating portion of the continuously variable transmission device in the operating position against the restoring force thereof. The positioning mechanism is provided so as to be freely switchable between an on-state in which a resistance is applied to the speed change lever and a cut state in which resistance is not applied to the speed change lever, and when the speed change lever is operated to the stop state, When the positioning mechanism is switched to the ON state by operating the lever and the shift lever is operated to the shifting state, the positioning mechanism is moved forward by the shift lever operation. It oscillates when the fixed side click member and the movable side click member move relative to each other and rub against each other as the speed change lever is operated in the speed change direction for operating the operation portion. It has a click mechanism that operates.

[Operation] When the gear shift lever is switched from the stop state to the gear shift state, the positioning mechanism is switched to the cut state due to the operation of the gear shift lever, and the gear shift lever is operated without receiving operational resistance by the positioning mechanism. The operation portion of the continuously variable transmission can be operated. When the operation of the operating portion is completed, the gear shift lever is switched from the gear shift state to the stop state to switch the positioning mechanism to the on state for the lever operation, and the positioning mechanism allows the operating portion of the continuously variable transmission to be operated. The shift lever is provided with a movement resistance for maintaining the shift lever in the operating position.

Further, since the positioning mechanism does not act as an operation resistance during the gear shifting operation, the oscillation of the click mechanism can be easily and accurately sensed, and the stroke of the gear shifting lever can be manipulated depending on the operating position. It is possible to shift gears while recognizing whether it has become accurate and easy.

[Effect] Therefore, the continuously variable transmission can be operated by operating the speed change lever so as to switch between the speed change state and the stop state and to move in the speed change direction, and the operated speed. The state can be maintained against the restoring force of the continuously variable transmission, and the shift operation can be easily performed by only handling the shift lever. In addition, the gear shift lever can be operated lightly without being subject to the operational resistance of the positioning mechanism.

Further, when repeating the acceleration and deceleration, the shift operation is performed while recognizing the operation amount and the operation position of the shift lever easily and accurately by the oscillation operation of the click mechanism, and the shift lever is operated based on the operation amount and the operation position. The shift operation can be advantageously performed, for example, by easily recognizing that the operation position is the operation target operation position and accurately and quickly reproducing the continuously variable transmission in the speed change target gear change state.

The structure, operation and effect of the invention according to claim 2 are as follows.

[Structure] In the structure of the invention according to claim 1, the positioning mechanism includes a positioning member having a plurality of recesses arranged in the gear shift direction of the speed change lever, and a locking member that is engageable with and disengageable from the recesses. And the locking member is engaged with the recess to impart the movement resistance to the shift lever.

[Operation] Since the locking member is engaged with the recess and the locking member and the positioning member are engaged with each other, movement resistance is imparted to the speed change lever. Therefore, a restoring force of the continuously variable transmission is provided. Even if the gear shift lever vibrates due to strong vibrations or vibrations caused by driving and traveling of the continuously variable transmission, the gear shift lever is firmly provided with movement resistance so that the gear shift lever is not displaced. Thus, the continuously variable transmission can be firmly maintained at the operated speed state.

[Effect] Therefore, even if the driving force of the continuously variable transmission increases or the restoring force or vibration of the operation unit or the gear shift lever becomes strong due to traveling on an uneven terrain or the like, the continuously variable transmission can be performed. The device can be firmly maintained in a predetermined speed change state.

The structure, operation, and effect of the invention according to claim 3 are as follows.

[Structure] In the structure of the invention according to claim 2, the positioning mechanism is switched to the ON state by switching the shift lever to the stop state at the operating position when the click mechanism oscillates. It is configured to be replaced.

[Operation] When the click mechanism is oscillated by operating the shift lever in the shifting direction, the positioning mechanism is put in the closed state by switching the shift lever from the shift state to the stop state at the operation position at that time. By switching, the movement resistance is imparted to the speed change lever so that the continuously variable transmission can be maintained in its speed state.

[Effect] Therefore, when the oscillating operation of the click mechanism is detected when the acceleration / deceleration is repeated, the gear shift lever is the operation target and the operating position where the positioning mechanism should be acted is detected. Recognize,
The speed change operation can be advantageously performed by accurately and easily switching to a speed state in which the continuously variable transmission can be reproduced.

The constitution, action and effect of the invention according to claim 4 are as follows.

[Structure] In the structure of the invention according to claim 1, the positioning mechanism includes a fixed-side friction member supported by a fixed portion and a movable-side friction member that is interlocked with a speed change lever. The movement resistance is imparted to the speed change lever by the friction between the fixed side friction member and the movable side friction member.

[Operation] When the gear shift lever is switched from the stop state to the gear shift state, the positioning mechanism is switched to the cut state due to the lever operation, and the friction between the fixed side and movable side friction members is released. The continuously variable transmission can be operated by operating the speed change lever without receiving the operation resistance of the positioning mechanism. When this gear shifting operation is completed, the gear shifting lever is switched from the gear shifting state to the stopping state, so that the positioning mechanism switches to the on state for this lever manipulation, and due to the friction between the fixed side and movable side friction members, Movement resistance for maintaining the position of the continuously variable transmission at the operated speed is imparted to the speed change lever.

[Effect] Therefore, the continuously variable transmission can be operated by operating the speed change lever so as to switch between the speed change state and the stop state and to move in the speed change direction, and the operated speed state. It can be maintained against the restoring force, and the shift operation can be performed easily by simply handling the shift lever. Moreover, the gear shift lever can be lightly operated by operating the gear shift lever without receiving the operation resistance of the positioning mechanism.

The constitution, action and effect of the invention according to claim 5 are as follows.

[Structure] In the structure of the invention according to any one of claims 1 to 4, a cushioning material is interposed between the fixed side click member and a member supporting the fixed side click member.

[Operation] Even if a sound is generated in addition to vibration when the click mechanism oscillates, it is easy to be transmitted to the speed change lever, but it is easy to transmit to the member supporting the fixed side click member. The cushioning material makes it difficult to transmit.

[Effect] Therefore, the oscillation by the click mechanism is transmitted to the gear shift lever, and it is easy to recognize the operation amount and the operating position of the gear shift lever by sensing this, but vibration and sound are difficult to be transmitted to the support member. It is easy to operate, such as making less noise.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] As shown in FIG. 1, a pair of left and right front wheels 1 and a pair of left and right rear wheels 2 which can be steerably operated are driven by a driving force of an engine 3 to drive the vehicle. The lift arms 6 are located inside the mission case 5 on both sides of the mission case 5 which constitutes the rear part of the vehicle body frame of the vehicle body which runs and which has the driving cabin 4. A lift cylinder (not shown) is provided so as to swing up and down, and a power take-off shaft 7 is provided at the rear of the mission case 5.
A tractor is constructed. This tractor is connected to a rear part of a self-propelled vehicle so that a rotary tiller can be moved up and down by the pair of left and right lift arms 6, and the rotary tiller can be connected to the engine 3 from the power take-off shaft 7.
The driving force is transmitted to form a riding-type rotary tiller, and various working devices are connected to be movable up and down and driven to form various working machines.

A clutch (not shown) from the engine 3
The drive force transmitted via the
After being transmitted to the traveling mission (not shown) located inside the mission case 5 via the continuously variable transmission 10 located at the front of the vehicle, the output of this traveling mission is located inside the mission case 5. A rotary shaft 8 extending from the transmission case 5 to the left and right rear wheels 2 via a wheel differential mechanism (not shown) and a front wheel differential mechanism (not shown) located inside the front wheel drive case 9. ) Via left and right front wheel 1
It is configured to transmit to each.

The continuously variable transmission 10 is driven by a variable displacement axial plunger pump whose output shaft is linked to a transmission shaft (not shown) from the engine 3, and pressure oil from the axial plunger pump. In addition, the output shaft is configured as a hydrostatic continuously variable transmission including an axial plunger motor that is interlocked with the input portion of the traveling mission. Thereby, the continuously variable transmission 10
Changes the swash plate angle of the axial plunger pump by swinging the arm-type operation unit 11 attached to the outside of the transmission case around the axis 11a, so that the driving force from the engine 3 is changed to the forward side. The forward transmission state in which the driving force is transmitted to the front and rear wheels 1 and 2, the reverse transmission state in which the driving force from the engine 3 is transmitted to the front and rear wheels 1 and 2 in the backward traveling side, and the driving of the motor is stopped. To a neutral state in which power transmission to the front and rear wheels 1 and 2 is stopped, and the driving force from the engine 3 is steplessly changed in both the forward transmission state and the reverse transmission state. Communicate to.

The gear shift operating device for operating the continuously variable transmission 10 includes a gear shift lever 13 and a rear wheel fender 1 provided on the side of a driver's seat 4a located inside the driver's cabin 4.
Positioning member 31 (FIG. 3) fixed to the back side of No. 4
And a click mechanism 40 including a fixed-side click member 41 (FIG. 3) fixed to the rear surface side of the rear wheel fender 14, and are described in detail below. It is configured like this.

As shown in FIG. 2, the gear shift lever 13 has a tip end side of a rocking lever 16 in which a base end side mounting cylinder portion 16a is supported by a support body 15 fixed to a lateral side portion of the transmission case 5. It is supported by a lever support 17 fixed to. The mounting cylinder portion 16a of the swing lever 16
Is relatively rotatably fitted onto the rotation support shaft 18a of the traveling auxiliary shift lever 18 which is rotatably supported by the support 15. As shown in FIG. 4 and the like, the lever support 17 rotatably supports a boss portion 13 a on the base end side of the speed change lever 13 via a support pin 19. As shown in FIGS. 1 and 2, the mounting cylinder portion 16a of the swing lever 16 has a base end side integrated with the end portion of the mounting cylinder portion 16a opposite to the side to which the swing lever 16 is connected. A swing arm 21 that is rotatably connected, and this swing arm 2
Interlocking rod 2 whose one end side is connected to 1 so that relative rotation is possible
2 is connected to the operation portion 11 of the continuously variable transmission 10.

As a result, the speed change lever 13 swings around the axis X of the rotary support shaft 18a, which is oriented laterally of the vehicle body.
The rear wheel fender 1 is supported so as to swing with respect to the vehicle body in the vehicle front-rear direction and swing around the axis Y of the support pin 19 in the vehicle lateral direction with respect to the vehicle body.
The sheet metal member that is fixed to the rear surface side of 4 and constitutes the positioning member 31 and the fixed-side click member 41 is provided with a bent shape in which the rear end side portion is displaced laterally outward of the vehicle body from the front end side portion. By operating to move in the lateral direction of the vehicle body inside the guide groove 23 (FIG. 3), switching is performed between the gear shifting state closer to the fixed side click member 41 and the stop state closer to the positioning member 31. With such a configuration, the operation portion 11 is oscillated by the operation force by moving the vehicle along the guide groove 23 in the longitudinal direction of the vehicle body while maintaining the shift state. The part 11 is interlockingly connected via a rocking lever 16, a rocking arm 21, and an interlocking rod 22.

As shown in FIG. 4, the speed change lever 13 is automatically switched from the speed change state to the stop state by a positioning spring 32, which is a winding spring having a coil portion externally fitted to the boss portion 13a. It is oscillated.

As shown in FIG. 5, the positioning mechanism 30 is arranged in the longitudinal direction of the vehicle body, which is the gear shifting direction for moving the gear shifting lever 13 for gear shifting operation of the continuously variable transmission 10, and faces the guide groove 23. The positioning member 31 provided with a plurality of open engaging recesses 33, 34, 35, the locking member 36 formed of a tongue piece fixedly provided on the rod portion of the speed change lever 13, and the positioning. And a spring 32.

When the speed change lever 13 is operated in the forward movement area F (FIG. 5) located on the front end side of the guide groove 23 and the forward speed area F is switched from the speed change state to the stop state, the speed change lever is changed. The engaging member 36 of 13 engages with any one of the plurality of engaging recesses 33, 34, 35 which are arranged facing each other in the advance region F and is engaged with the engaging recess 33. The positioning spring 32 is turned on.
Maintained by The speed change lever 13 is the guide groove 2
3 is operated to the reverse travel region R (FIG. 5) located on the rear end side, and when the shift state is switched to the stop state in the reverse travel region R, the locking member 36 of the shift lever 13 is operated.
Of the plurality of engaging recesses 33, 34, 35 are engaged with any one of the engaging recesses 35 facing the backward travel region R and the positioning spring 32 is brought into this engaged state. Maintained by Then, in any case, the positioning member 31 acts as a stopper with respect to the speed change lever 13 by the engagement with the locking member 36, and the positioning mechanism 30 has a restoring force provided for returning the operating portion 11 to the neutral position. Against this, a shift resistance for maintaining the operation portion 11 at the operation position corresponding to the operation position of the speed change lever 13 is given to the speed change lever 13 to enter the entering state.

When the speed change lever 13 is operated to the neutral area N (FIG. 3) located in the center of the guide groove 23 and the speed change state is switched to the stop state in the neutral area N, the speed change lever 13 Of the plurality of engaging recesses 33, 34, 35 engages with the engaging recess 34 facing the neutral zone N and is maintained in this engaged state by the positioning spring 32. It Then, the positioning member 31 is engaged with the locking member 36 so that the shift lever 1
3, the positioning mechanism 30 operates the operation unit 1
Regardless of the vibration that occurs in No. 1, the shift lever 13 is held in the neutral position so that the operating portion 11 is positioned in the neutral position.

When the speed change lever 13 is operated to switch from the stop state to the speed change state, the locking member 36 causes the recess 3 of the positioning member 31 to operate the speed change lever.
When the positioning mechanism 30 is disengaged from the gears 3, 34 and 35, the positioning mechanism 30 is in a cut state so as to release the stopper action and the holding action with respect to the speed change lever 13 so as to allow the movement operation of the speed change lever 13.

As shown in FIG. 5, the click mechanism 40 comprises a plurality of through-holes which are long in the lateral direction of the vehicle body and are arranged on the rear surface side of the rear wheel fender 14 in the shifting direction of the shifting lever 13. The pin provided on the lever support 17 by bending and forming the fixed-side click member 41 having the oscillation recess 42 and a part of the metal plate member forming the lever support 17 as shown in FIG. Support part 1
The movable side click member 43, which is a click pin slidably supported by 7a, and the movable side click member 43 so that the tip side of the movable side click member 43 enters the oscillation recess 42 of the fixed side click member 41. It is constituted by a click spring 44 which is biased by sliding.

Since the lever support 17 moves together with the speed change lever 13 around the axis X, the movable side click member 43 is operated in the longitudinal direction of the vehicle body to operate the continuously variable transmission 10. When the speed change lever 13 is operated in the speed change direction, the movable side click member 43 and the fixed side click member 41 move relative to each other and rub against each other. Each time the click member 43 matches the oscillation concave portion 42 of the fixed side click member 41, the tip side of the movable side click member 43 enters the oscillation concave portion 42 due to the sliding bias of the click spring 44 and is fixed to the movable side click member 43. The side click member 41 is in contact with each other to oscillate.

As shown in FIG. 3 and the like, a cushioning member 45 made of a rubber sheet is interposed between the sheet metal member forming the fixed side click member 41 and the positioning member 31 and the rear wheel fender 14. is there.

As a result, the click mechanism 40 oscillates due to the friction between the movable side click member 43 and the fixed side click member 41 as the speed change lever 13 is operated along the guide groove 23 in the longitudinal direction of the vehicle body. Then, while the sound generated by the oscillation is transmitted to the inside of the driving cabin by the cushioning member 45, the click is made via the speed change lever 13 so that the operated amount and the operated position of the speed change lever 13 can be easily sensed. Communicate the feeling to the driver.

As shown in FIG. 5, the engaging recesses 33, 34, 35 of the positioning mechanism 30 and the oscillating recess 42 of the click mechanism 40 have the same arrangement pitch of the recesses 33, 34, 35, 42. In addition, the engagement recesses 33, 34, 35 and the oscillation recess 42, which face each other with the guide groove 23 in between, and the oscillation recess 42 are arranged on a straight line orthogonal to the shift direction of the shift lever 13. As a result, the shift lever 1
3 is operated in the front-rear direction of the vehicle body to reach the operating position where the click mechanism 40 oscillates, the switching lever 13 is switched from the shifting state to the stopping state at the operating position to lock the locking member. 36 is the engaging recess 33,
The positioning mechanism 30 is put in the engaged state by engaging with 34 and 35.

That is, in order to operate the continuously variable transmission 10, the speed change lever 13 is moved around the axis Y against the positioning spring 32 toward the driver's seat 4a so as to move from the stop state to the above-mentioned state. Switch to the shifting state. When the positioning mechanism 30 is switched from the operation state to the operation release state by this lever operation, the transmission lever 13 is moved in the vehicle longitudinal direction along the guide groove 23 around the axis X while maintaining the transmission lever 13 in the transmission state. Operate in the forward range F, the neutral range N, or the reverse range R. When operating in the forward range F, the operation unit 11
Is in the forward drive position, the continuously variable transmission 10 is in the forward drive state, and when operating in the reverse drive range R, the operating portion 11 is in the reverse drive position and the continuously variable transmission 10 is in the reverse drive state. In both the forward drive range F and the reverse drive range R, as the operation amount from the neutral range N of the speed change lever 13 increases, the continuously variable transmission 10 increases.
Is on the high speed side. Further, in both the forward drive range F and the reverse drive range R, when the gear shift lever 13 is moved around the axis Y away from the driver seat 4a to switch from the gear shift state to the stop state, the positioning mechanism 30 is in the cut state. The shift state is switched to the on state and the movement resistance is given to the speed change lever 13. As a result, the operation portion 11 can be maintained at the operation position corresponding to the operation position of the speed change lever 13 against the neutral restoring force, and the continuously variable transmission 10 can be maintained at the speed state in which the speed change operation is performed.

When the speed change lever 13 is operated to the neutral range N,
The operation unit 11 is in the neutral position and the continuously variable transmission 10 is in the neutral state. At this time, when the shift lever 13 is moved around the axis Y away from the driver's seat 4a to switch from the shift state to the stop state, the positioning mechanism 30 switches from the cut state to the on state and the shift lever 13 moves. Hold. As a result, the operation unit 11 can be positioned in the neutral position so as not to move from the neutral position, and the continuously variable transmission 10 can be maintained in the neutral state.

When the continuously variable transmission 10 is shifted by operating the shift lever 13 in the front-back direction, the click mechanism 40 is used.
Oscillates, and oscillates every time the shift lever 13 reaches an operating position where the positioning mechanism 30 can hold the position, so that this oscillation is sensed and the operation amount of the shift lever 13 becomes Lever 1
The shift operation can be performed while easily recognizing which operation position the 3 is in.

[Second Embodiment] FIG. 6 shows a gear shift operating device having a different embodiment. This gear shift operating device has an embodiment similar to that of the gear shift operating device of the first embodiment. The shift lever 13 and the click mechanism 40,
The positioning mechanism 50 is provided with an embodiment different from that of the gear shift operating device of the first embodiment, and only the positioning mechanism 50 will be described below.

The positioning mechanism 50 is provided with the speed change lever 13
A fixed friction member 51 made of rubber, which is formed in the shape of a rail that is long in the direction of movement around the shaft center X of the rear wheel and is fixed to the rear surface side of the rear wheel fender 14, and a mounting member 5 for the speed change lever 13.
One end side is rotatably connected via 2 and a connecting pin 53, and a wedge-shaped movable side friction member 54 that moves together with the speed change lever 13 that is operated in the vehicle front-rear direction around the axis X, It is constituted by the positioning spring 32.

When the speed change lever 13 is switched to the stop state, the tip end side of the movable side friction member 54 is pushed between the pair of holding plate portions 51a of the fixed side friction member 51 for the positioning spring 32. Operated.
Then, the movable-side friction member 54 is sandwiched by the pair of sandwiching plate portions 51 a, and the fixed-side friction member 51 acts as a stopper on the shift lever 13 due to the friction generated between the stationary-side friction member 51 and the movable-side friction member 54. As a result, the positioning mechanism 5
0 enters the shift state in which the shift lever 13 is provided with a movement resistance for maintaining the operating portion 11 in the operating position against the neutral restoring force.

When the speed change lever 13 is switched from the stop state to the speed change state, the movable side friction member 54 moves toward the speed change lever 13 with respect to the fixed side friction member 51 due to the operation of the speed change lever. The movable side friction member 54 is released from the fixed side friction member 51, and the positioning mechanism 5
0 is in a cut state so as to release the stopper action and the holding action for the shift lever 13 to allow the movement operation of the shift lever 13.

In the detection switch 60 shown in FIG. 4, when the shift lever 13 is operated in the reverse range R, the operation portion is pressed by the switch operation piece 61 fixed to the swing lever 16. It is detected that the shift lever 13 has been operated in the reverse travel region R and a lift command for operating the lift arm 6 to the lift side of the linked work device is output to the lift arm operation mechanism.

[Other Embodiment] Fixed side click member 41,
The positioning member 31 and the fixed-side friction member 51 may be configured to be supported by the rear wheel fender 14 or may be configured to be supported by a bracket fixed to the vehicle body frame. In short, the fixed click member 41, the positioning member 31, and the fixed friction member 51 are
It may be fixed so as not to move regardless of the movement of the shift lever 13. Therefore, the rear wheel fender 1
4, brackets and the like are collectively referred to as a fixed portion 14.

In addition to the hydrostatic continuously variable transmission 10 as in the above embodiment, a belt type continuously variable transmission using a split pulley and a belt and a continuously variable transmission using a taper cone are operated. The present invention can also be applied to a shift operating device. Therefore, these transmissions are collectively referred to as the continuously variable transmission 10.

[Brief description of drawings]

FIG. 1 is a side view of the entire tractor.

FIG. 2 is a front view of a shift lever support structure.

FIG. 3 is a vertical sectional front view of a click mechanism and a positioning mechanism.

FIG. 4 is a side view of the shift lever.

FIG. 5 is a plan view showing a fixed click member and a positioning member.

FIG. 6 is a front view of a gear shift operating device including a second embodiment.

[Explanation of symbols]

10 continuously variable transmission 11 Operation part 13 Gear shift lever 14 Fixed part 30,50 Positioning mechanism 31 Positioning member 33,35 recess 36 Locking member 40 click mechanism 41 Fixed side click member 43 Movable side click member 45 cushioning material 51 Fixed side friction member 54 Movable side friction member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshiaki Niimoto             64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubo Co., Ltd.             Ta Sakai Factory F-term (reference) 3D040 AA24 AB04 AC13 AC14 AC20                       AC48 AC58 AC59 AC60 AC65                       AD07

Claims (5)

[Claims] 1. A gear shift operating device comprising a gear shift lever interlockingly coupled to an operating portion of a continuously variable transmission, wherein the gear shift lever is set to a gear shifting state for operating the operating portion, and the operating portion. Positioning configured to be freely switchable to a stop state for maintaining the operating position and giving a movement resistance to the shift lever so as to maintain the operating portion of the continuously variable transmission against the restoring force of the operating portion. The mechanism is provided so as to be switchable between an on-state in which a resistance is applied to the speed change lever and a cut-off state in which resistance is not applied to the speed change lever. When the speed change lever is operated to the stop state, the speed change lever The positioning mechanism is switched to the entry state by an operation,
When the shift lever is operated to the shift state, the positioning mechanism is switched to the switching state by the shift lever operation, and the shift lever is operated in the shift direction to operate the operation portion. In addition, the shift operating device includes a click mechanism that oscillates when the fixed-side click member and the movable-side click member relatively move and rub against each other. 2. The positioning mechanism includes a positioning member having a plurality of recesses arranged in the gear shift direction of the speed change lever, and a locking member that is engageable with and disengageable from the recesses. The gear shift operation device according to claim 1, wherein the gear shift operation device is configured to impart the movement resistance to the gear shift lever by being engaged with the recess. 3. The positioning mechanism is configured to switch to the ON state by switching the shift lever to the stop state at an operating position when the click mechanism oscillates. The described gear shift operation device. 4. The positioning mechanism includes a fixed-side friction member supported by a fixed portion and a movable-side friction member that is interlocked with a speed change lever. The fixed-side friction member and the movable-side friction member. The gear shift operation device according to claim 1, wherein the shift resistance is applied to the gear shift lever by the friction of the. 5. The gear shift operating device according to claim 1, wherein a cushioning material is interposed between the fixed click member and a member supporting the fixed click member.