JPH08337130A - Speed change operation device for vehicular controller - Google Patents

Abstract

PURPOSE: To enable a single operation lever to make selection between a hydraulic continuously variable transmission and a gear sub-transmission, and easily and stably position a operation lever. CONSTITUTION: One end of a rod 27 is connected to a shift lever 13 at a neutral position and the other end thereof is provided with a slider 28. This slider 28 can move back and forth on a detent bar 30 fixed to a frame 29, and is caught with recesses formed on the detent bar 30 at the prescribed pitch. Thus, the shift lever 13 can be arbitrarily positioned via engagement of the slider 28 with the recesses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift operating device for a passenger management machine, and more particularly to a shift operating device for performing a switching operation of a hydraulic continuously variable transmission and an auxiliary transmission by a single shift lever. It is a thing.

[0002]

2. Description of the Related Art In a traveling transmission system using a hydraulic continuously variable transmission, there are many forms in which an auxiliary transmission having a gear structure is provided to perform a different gear shifting operation. In such a form, both the main gear shift lever and the sub gear shift lever need to be shifted, which is complicated.

In order to simplify the gear shifting operation, there has been proposed a gear shifting operating device which is capable of switching between a hydraulic continuously variable transmission and a sub transmission by a single gear shift lever. (Japanese Patent Application No. 7-31901).

In the gear shifting operation device of the above-mentioned application, the auxiliary gear shift can be switched between the high speed side and the low speed side by operating the speed change lever to the left and right at the neutral position of the hydraulic continuously variable transmission. Further, on the high speed side or the low speed side, by operating the shift lever forward or backward, the hydraulic continuously variable transmissions are continuously shifted to perform main shift switching.

Further, a spring wound in a spiral shape is provided around the lever shaft, which is a fulcrum of rotation of the speed change lever, and the speed change lever is positioned by holding the rotation position of the speed change lever. Is formed.

[0006]

In the gear shift operation device of the above-mentioned application, since the rotation fulcrum of the gear shift lever is clamped and positioned by the spring, it may not be positioned correctly depending on the pressure of the spring. However, the adjustment is difficult, and the position is apt to be displaced due to the vibration of the machine body and the stability is not good. Further, when the sub-shift changeover operation for shifting in the lateral direction is performed, the arm elastically urged by the spring due to the lateral swing of the lever is easily twisted and damaged.

Therefore, a technique to be solved in order to switch both the hydraulic continuously variable transmission and the auxiliary transmission having a gear structure with one shift lever and to position the shift lever easily and stably. Therefore, the present invention aims to solve this problem.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and is a traveling transmission device using a hydraulic continuously variable transmission, in which a sub-transmission is made to a high speed side and a low speed side. In a speed change operation device having a neutral position of a speed change lever for switching and guiding to, a one end of a rod is connected to an intermediate position of the speed change lever, a slider is provided at the tip of the rod, and resistance is imparted to the slider, A shift operating device for a passenger management machine for positioning the shift lever is provided.

[0009]

A slider is provided at the tip of the rod connected to the intermediate position of the shift lever, and resistance is applied to this slider to hold the shift lever at an arbitrary position. Since the slider is connected to the gear shift lever via the rod, the rod is inclined to absorb the twist even when the gear shift lever is operated to the left and right, and the resistance imparted to the slider is not hindered.

Further, since the rod is connected to a position apart from the rotation fulcrum of the speed change lever, the resistance can be adjusted more easily than the structure in which the resistance is applied to the rotation fulcrum, and the speed change lever is stably held. it can.

[0011]

An embodiment of the present invention will be described in detail below with reference to the drawings. 1 and 2 show a shift operating device of a passenger management machine, in which a hydraulic continuously variable transmission (HST) 11 and a transmission case 12 are integrally connected, and power from an engine is sent to the hydraulic continuously variable transmission 11. By inputting and turning the trunnion shaft 14 by operating the speed change lever 13,
The speed is continuously changed from the neutral stop position to the forward rotation high speed position or the reverse rotation high speed position. After that, the auxiliary transmission of the gear mechanism provided in the transmission case 12 is switched to the low speed position or the high speed position to perform the speed change operation.

The lower end of the speed change lever 13 is supported by a left and right lever shaft 15 and a front and rear swing shaft 16, and a bell crank 17 is rotatably pivoted around the lever shaft 15. ing. Bell crank 17 rear upper edge 17
A is pivotally attached to the swing shaft 16, and the shift lever 13 is swingable right and left around the swing shaft 16.

A trunnion arm 18 is fixed to the trunnion shaft 14, the trunnion arm 18 and the lower end of the bell crank 17 are connected by a rod 19, and a roller 20 is pivotally attached to the lower end of the trunnion arm 18. . Then, the front end of the arm 22 pivotally attached to the support shaft 21 is urged upward by the tensile force of the spring 23 to bring the roller 20 into contact with the V-shaped neutral cam 24.

As will be described later, when the hydraulic continuously variable transmission 11 is in the shift state in either forward or reverse mode by operating the shift lever 13, the driver side pedal is depressed to pull the rod 25. Then, the arm 22 is pulled up, the roller 20 moves to the center of the neutral cam 24, the tilted trunnion arm 18 returns to the vertical state, and the hydraulic continuously variable transmission 11 returns to the neutral position.

Further, the upper end of the shift lever 13 is projected upward from the shift guide hole 26 so that the operator can shift gears from the driver's seat. The shift guide hole 26 is formed in a substantially H shape in a plan view, and includes a neutral guide N in the left-right direction, a high speed side guide H for auxiliary shifting extending from the right end of the neutral guide N to the front and back, and a left end of the neutral guide N. A low-speed guide L for auxiliary shift that extends in the front-rear direction is provided.

If the operator tilts the speed change lever 13 to the right of the neutral guide N and further presses the speed change lever 13 forward or rearward, the bell crank 17 and the rod crank 17 and the rod crank 17 are moved when the auxiliary speed change device is switched to the high speed position. The trunnion arm 18 is tilted via 19 and the trunnion shaft 1
4 rotates, and the hydraulic continuously variable transmission 11 shifts continuously from low speed to high speed in either forward or reverse mode.

On the other hand, when the operator tilts the speed change lever 13 to the left of the neutral guide N and further presses the speed change lever 13 forward or backward, the auxiliary speed change device is switched to the low speed position and the hydraulic stepless operation is performed as described above. The transmission 11 shifts continuously from low speed to high speed in either forward or reverse mode. In this way, it is possible to easily switch the sub-shift and the continuously variable shift with the single shift lever 13.

Here, one end of a rod 27 is swingably connected to an intermediate position of the speed change lever 13, and the rod 2
A slider 28 is swingably provided at the tip of 7. The slider 28 is a detent bar 3 fixed to a frame 29.
It is fitted to 0 so that it can move back and forth.

FIG. 3 is a plan view of an essential part of the detent bar 30. The detent bar 30 is provided with V-shaped concave portions 31, 31 ... Continuously at a predetermined pitch. A steel ball 32 is enclosed inside the slider 28,
The steel ball 32 is pressed against the surface of the detent bar 30 by a coil spring (not shown) provided in the slider 28, and the steel ball 32 is placed in one of the recesses 31.
The slider 28 is locked to the detent bar 30 by pressing. That is, when the shift lever 13 is operated in the front-back direction, the slider 28 moves back and forth on the detent bar 30 via the rod 27, and the shift lever 13 is locked by the recesses 31, 31, ... Positioned step by step.

Here, a wide concave portion 33 having a flat bottom is provided at the central position of the detent bar 30.
The smooth portions 34, 34 are provided before and after. The slider 28 is located in the recess 33 when the speed change lever 13 is in the neutral position, and has a play in the front-rear direction when the steel ball 32 is pressed against the bottom of the recess 33, so that the slider 28 slightly moves in the front-rear direction. It is formed so that it can move.

Therefore, when the speed change lever 13 is in the neutral guide N of the shift guide hole 26, if the speed change lever 13 is pushed in the lateral direction from the center position, the slider 28 is pulled forward through the rod 27. Since the recess 33 has a play in the front-rear direction with respect to the steel ball 32, the slider 28 does not come out of the locked state at the neutral position. Further, the shift lever 13 is attached to the shift guide hole
3 is pushed forward or backward from the neutral position along the high speed side guide H or the low speed side guide L, the steel ball 32 of the slider 28 separates from the recess 33 as shown by the chain double-dashed line in FIG. Steel ball 32 is smooth part 3
.. are engaged with the respective concave portions 31, 31 ..., and the slider 28 is positioned in an arbitrary concave portion 31.

As described above, when the hydraulic lever 13 is pushed forward and backward to shift the hydraulic continuously variable transmission 11 forward or backward, the recess 31 of the detent bar 30 is formed.
The gear shift lever 13 can be positioned by locking the slider 28 every 31 ..., It becomes easy to maintain the vehicle speed at a constant state. On the other hand, even when the shift lever 13 is pushed in the left-right direction at the neutral position, the detent bar 3
The slider 28 does not come off from the recess 33 of 0,
The speed change lever 13 can be held in the neutral position.

Further, as compared with the structure in which the rotation fulcrum of the speed change lever is pressed into contact with a spring or the like for positioning, the steel ball 32 of the slider 28 and the recess 31 or 33 of the detent bar 30 are engaged with each other. Since the speed change lever 13 is positioned, the resistance for locking the slider can be easily adjusted and the speed change lever 13 can be stably held.

FIG. 4 shows another embodiment. Instead of the slider 28 described above, a rubber roller type slider 38 is provided at the tip of the rod 27, and both sides of the slider 38 are sandwiched by rubber guides 39 and 40. . When one guide 39 is pressed by the springs 41, 41, the slider 38 is locked at an arbitrary position by frictional force. Therefore, the shift lever 1
With No. 3, positioning can be performed steplessly regardless of whether the auxiliary shift is on the high speed side or the low speed side, and continuous shift operations can be performed.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[0026]

As described in detail in the above one embodiment, the present invention positions the gear shift lever by providing a slider at the intermediate position of the gear shift lever via a rod and applying resistance to the slider. Therefore, when the switching operation of both the hydraulic continuously variable transmission and the auxiliary transmission having a gear configuration is performed by one shift lever, the shift lever can be positioned easily and stably, and the operability is improved. In addition to being good, it can contribute to the improvement of the durability of the device.

[Brief description of drawings]

FIG. 1 is a side view of a shift operating device according to an embodiment of the present invention.

FIG. 2 is a plan view of a shift operation device.

FIG. 3 is a plan view of a main part of a detent bar.

FIG. 4 is a plan view of a gear shift operating device showing another embodiment.

[Explanation of symbols]

 11 hydraulic continuously variable transmission 13 speed change lever 27 rod 28 slider 30 detent bar 31, 33 recess 32 steel ball 38 slider 39, 40 guide 41 spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Miyauchi 1 Yakura, Tobe Town, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A travel transmission device using a hydraulic continuously variable transmission, comprising: a shift operation device having a neutral position of a shift lever for switching and guiding an auxiliary shift between a high speed side and a low speed side. A rod shift control device for a passenger management machine, characterized in that one end of a rod is connected to an intermediate position of the rod, a slider is provided at a tip of the rod, and resistance is applied to the slider to position the shift lever.