JPH0826934B2 - Remote control device for transmission - Google Patents

Description

The present invention relates to a remote control device for a transmission.

b. Conventional technology and its problems Conventionally, various remote control devices for remotely controlling a transmission have been proposed.

This remote control device is basically provided with a selecting means for moving a shift lever of a transmission in the selecting direction, a shifting means for moving the shift lever in the shifting direction, and a driving means arranged near the operator. The remote control unit includes an operation lever that is selected and shifted by the remote control unit, and a drive unit that drives the selection unit and the shift unit based on the selection signal and the shift signal output from the remote control unit.

By the way, there are three types of remote control devices: a pneumatic system, a hydraulic system, and a system using a motor.

However, these three methods have the following drawbacks.

That is, according to the pneumatic system, the cylinder diameter has to be increased in order to obtain the output required for the gear shift, resulting in a large size.

Further, according to the hydraulic system, since the hydraulic pressure is generally controlled using a solenoid valve that requires precision machining for hydraulic pressure, it becomes expensive,
Further, in such a configuration, although the cylinder diameter can be reduced, it becomes longer in the axial direction because it is necessary to provide the piston structure, stroke detection switch, and the like, and since a large number of solenoid valves are used, the size reduction and the I couldn't hope for weight reduction.

Furthermore, the motor system eliminates the need for a special piston structure, and the stroke detection switch described above can be replaced by the motor speed, which simplifies the structure but generates the force necessary for gear shifting. The motor to be driven becomes large in size, so that it is difficult to downsize the device even by this method.

c. Means for Solving the Problems The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a remote control device for a transmission that can be downsized.

In the present invention, in order to achieve the above-mentioned object, a select means formed by meshing a drive shaft of one motor with a select rod, a hydraulic drive unit for driving a shift rod, and an operation amount of the hydraulic drive unit are controlled. And a shift means including a control valve, the control valve being rotated by the other motor.
Second valve member and a second member rotated by the shift rod
And the second valve member is rotated relative to each other, and is caused between the first valve member and the second valve member. It is configured to be displaced from the neutral state, and the supply / discharge direction of the pressure oil to / from the hydraulic drive unit is controlled according to the direction of this displacement. Therefore, when the first valve member is rotated, Correspondingly, the shift rod is driven at the same time,
With the drive of the shift rod, the second valve member follows the first valve member, and the drive of the shift rod is stopped when the control valve returns to the neutral state.

d. Embodiment Hereinafter, an embodiment of a remote control device for a transmission according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show an embodiment of the present invention.

The remote control device 1 for a transmission according to the present embodiment includes a selector means 3 for moving a shift lever 2a of a transmission 2 in a select direction (direction of arrow A in FIG. 1) and a shift direction for the shift lever (in FIG. 1). A shift means 4 for moving in the direction of arrow B), a remote operation unit 5 provided with an operation lever 5a arranged in the vicinity of the operator, and selected and shifted by the operator, and output from the remote operation unit. Drive means 6 for driving the select means 3 and the shift means 4 based on the select signal and shift signal
And etc. Here, the selecting means 3 includes a select rod 7 having a rack 7a on a part thereof and a rack 7a on the drive shaft 9.
Stepping motor 8 with pinion 9a meshed with
It consists of and. Further, the shift means 4 is partially provided with the rack 10a.
A shift rod (10), a hydraulic drive unit (11) for hydraulically driving the shift bar, a rotor (12) and a sleeve (13), which are relatively rotated to change the throttle amount, whereby the hydraulic drive unit (11). Control valve 14 for controlling the operation amount of the control valve 14, a pinion 15 arranged on the sleeve 13 of the control valve and meshed with the rack 10a of the shift rod 10, and a stepping motor 16 for rotating the rotor 12 of the control valve 14. It consists of and.

The hydraulic drive unit 11 includes a piston 11a fixed to the shift rod 10 and two high pressure chambers 1 defined by the piston.
It consists of 1b and 11c.

The control valve 14 has a rotor 12 at the center thereof, and passage grooves 20a, 20b, ..., 20f are equally arranged on the outer peripheral portion 20 of the rotor at six locations at predetermined intervals in the circumferential direction. As well as
A return passage 21 connected to the tank 18 is formed in the central portion along the axial direction, and the return passage 21 is connected to the rotor.
12 Return ports 22a, 22b, 22c extending to the outer periphery are provided so as to open in every other passage groove 20b, 20d, 20f among the passage grooves.

On the other hand, in the inner peripheral portion of the sleeve 13 that encloses and surrounds the rotor 12, the passage grooves 23a, 23b, and the passage grooves 23a, 23b, which are out of phase with the passage grooves 20a to 20f on the rotor 12 side in the circumferential direction, are similarly formed.
..., 23f are equally distributed, and these passage grooves 23a to 2f are formed.
3f faces the land portion between the passage grooves 20a to 20f on the rotor 12 side. Then, the passage groove 23 on the sleeve 13 side
In a to 23f, first and second supply ports 24a, 24b, 24c and 25a, 25b, 25c connected to the high pressure chamber 11b and the high pressure chamber 11c of the hydraulic drive unit 11 are alternately bored from the sleeve outer peripheral portion. It has been opened. Further, suction ports 26a, 26b, 26c connected to the pump 17, respectively, are similarly bored and opened from the outer peripheral portion of the sleeve in the land portions that are located between the ports (24, 25). Return ports 22a, 22b, 22c
Faces the inside of the passage grooves 20a, 20c, 20e on the rotor 12 side that are not open.

Therefore, according to the above-described configuration, the suction ports 26, the first and the second ports are provided between the rotor 12 and the sleeve 13 at the respective passage grooves 20, 23 and the land portion at three circumferential positions.
The flow paths on the supply side and the return side that communicate between the supply ports 24 and 25 and the return port 22 are formed, and the relative rotation between the rotor 12 rotated by the stepping motor 16 and the sleeve 13 around it. The above-mentioned flow path with different displacement
As shown in FIGS. 4 and 5, by appropriately connecting or disconnecting, the pressure oil from the pump 17 is supplied to the high pressure chambers 11b, 11c of the hydraulic drive unit to move the piston 11a in a desired direction. Is possible.

The stepping motors 8 and 16 are feedback-controlled by the controller 27 of the driving means 6, respectively.

The select rod 7 and the shift rod 10 are slidably accommodated and supported in an integral housing 28 in a manner orthogonal to each other.

 Next, the operation of this embodiment will be described.

When the operator moves the operation lever 5a in the select direction C and the shift direction D to indicate the gear shift position, the remote operation unit 5 outputs a select signal and a shift signal corresponding to the gear shift position to the controller 27.

Here, for example, when the gear shift position is instructed from the illustrated position to the one-step position, first, the stepping motor 8 is activated to rotate the pinion 9a on the rack 7a, which causes the select rod 7 to move to the first position. It is moved upward in the figure. At this time, the controller 27 receives the feedback signal of the stepping motor rotation amount from the detection means (not shown) for detecting the rotation amount of the stepping motor 8, detects the movement amount of the select rod 7, and detects the rotation amount of the stepping motor. Adjust by slightly increasing or decreasing. When this selecting operation is completed, the controller 27 then operates the stepping motor 16. Then, the rotor 12 of the control valve 14 rotates in the direction of arrow E from the neutral state as shown in FIG. 3, and the ports 26a and 24a (the ports 26b and 24b,
Ports 26c and 24c) are communicated with each other, and ports 25a and 22a (ports 25b and 22b, ports
25c and port 22c) are connected respectively. This allows
While the pressure oil is supplied from the pump 17 to the high pressure chamber 11c,
The hydraulic oil is returned from the high pressure chamber 11b to the tank 18, and the shift rod 10 is moved leftward in FIG. This movement of the shift rod 10 causes the pinion 1 that meshes with the rack 10a.
5 is rotated and the sleeve 13 is also rotated. When the stepping motor 8 is stopped, the shift rod 10 is stopped because the control valve 14 is returned to the neutral position by the restoring force of a reaction force member such as a torsion bar or a C-shaped spring (not shown). That is, the shift rod 10 moves by a distance corresponding to the rotation amount of the stepping motor 16 by the hydraulic force. Therefore, the amount of movement of the shift bar 10 can be adjusted by feeding back the amount of rotation of the stepping motor 16 to the controller 27.

When the operator returns the operation lever 5a to the neutral position or the original position, the rotor 12 of the control valve 14 moves the arrow F as shown in FIG.
It rotates in the direction and operates in the opposite direction.

The control valve is not limited to the rotary valve of the above embodiment, but may be a flapper valve and a disc type control valve described in JP-A-58-156458, in short, by rotating them relative to each other. Any structure may be used as long as it can switch the supply of pressure oil to the two high pressure chambers of the hydraulic drive unit.

Further, an operation switch may be used in place of the operation lever of the above-described embodiment, and the gear may be automatically changed by depressing the accelerator pedal.

d. Effect of the Invention As described above, according to the remote control device for a transmission according to the present invention, the shift rod that requires a large force particularly for gear shift uses hydraulic force only in an amount corresponding to the rotation amount of the motor. And a structure for moving it, a so-called hydraulic boost mechanism,
The select rod, which does not require much force, is directly moved by the motor, so a small motor can be used, and the movement amount of the shift rod and select rod can be adjusted without using the stroke detection switch. Since it can be confirmed based on the rotation amount of each motor, the movement amount thereof can be easily adjusted, and the device can be downsized.

[Brief description of drawings]

1 to 4 show an embodiment of a remote control device for a transmission according to the present invention. FIG. 1 is a diagram conceptually showing the overall structure thereof, and FIG. 2 is a control valve and hydraulic pressure. Sectional views conceptually showing the drive unit, FIGS. 3 and 4 are views for explaining the operation of the control valve. DESCRIPTION OF SYMBOLS 1 ... Remote control device, 2 ... Transmission, 3 ... Selection means, 4
... shift means, 5 ... remote control unit, 5a ... operating lever, 6 ... drive means, 7 ... select rod, 7a ... rack,
8 ... Stepping motor, 9 ... Drive shaft, 9a ... Pinion,
10 ... Shift rod, 10a ... Rack, 11 ... Hydraulic drive unit, 12
… Rotor, 13… Sleeve, 14… Control valve, 15… Pinion,
16 ... Stepping motor, 17 ... Pump, 18 ... Tank.

Claims (1)

[Claims] 1. A shift means comprising a select means formed by meshing a drive shaft of one motor with a select rod, a hydraulic drive section for driving a shift rod, and a control valve for controlling an operation amount of the hydraulic drive section. The control valve includes a first valve member that is rotated by the other motor and a second valve member that is rotated by the shift rod. By relatively rotating the second valve member, the second valve member is displaced from the neutral state caused between the first valve member and the second valve member,
The supply / discharge direction of the pressure oil to / from the hydraulic drive unit is controlled according to the direction of the displacement, and accordingly, when the first valve member is rotated, the shift rod corresponds to the rotation direction. When the shift rod is driven, the second valve member follows the first valve member, and when the control valve returns to the neutral state, the drive of the shift rod is stopped. A remote control device for a transmission, characterized in that