JP2001153223A - Transmission operating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a stroke of a shift lever to that as in a passenger can without increasing a cylinder bore. SOLUTION: A booster device 10 for assisting the shifting force of a transmission is equipped with a cylinder chamber 13 formed in a body 11, a piston 14 fitted in the cylinder chamber 13, an output shaft 20 fixed to the piston 14 and connected to a shift and select shaft 2, an input shaft 21 connected to a change lever, and a pair of control valves 30, 30R for controlling the supply and discharge of air to the cylinder chamber 13 by the operation of the input shaft 21. The output shaft 20 and the input shaft 21 are disposed substantially parallel to each other and connected to each other by a link bar 23, and a connecting rod 27 of the change lever is connected to the middle part of the link bar 23. Thus, the change lever is connected to the middle part of the link bar so that the stroke Si of the input shaft can be set shorter to the stroke So of the output shaft at a lever ratio of the link lever.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission operating device for reducing the operating force of a transmission used in a vehicle, for example, an operating device for a transmission mounted on a large vehicle such as a bus or a truck. About effective technology to use.

[0002]

2. Description of the Related Art A large force is required for shifting operations of a transmission mounted on a large vehicle such as a bus or a truck.
For this reason, a transmission operating device configured to assist a driver's operating force by associating a booster device with a change lever may be used. That is, the booster device includes an air cylinder device that drives the output shaft, and a control valve that supplies and discharges air in accordance with the operation of the input shaft in the air cylinder device. The input shaft is connected to the change lever. And the output shaft is connected to the shift and select shaft. The control valve supplies air to the air cylinder device by an input shaft that is interlocked with the operation of the driver's change lever at the time of gear shifting, and the output shaft is moved by the operating force of the air cylinder device, thereby shifting the shift and select shaft. It is configured to be driven.

In a conventional transmission operating device, a stroke of an input shaft and a stroke of an output shaft are set to be one-to-one in order to transmit an appropriate operation feeling to a driver when operating a change lever.

[0004]

By the way, there is a need in the market for a transmission operating device for a large vehicle such as a bus or a truck to reduce the stroke of the shift lever to the same level as a passenger vehicle. In the conventional transmission operating device, the stroke between the input shaft and the output shaft connected to the shift lever is set to one-to-one. Therefore, when the stroke of the shift lever is reduced, the stroke of the output shaft is also reduced. Will do.

[0005] However, if the stroke of the output shaft is simply shortened, the output of the output shaft becomes insufficient. Therefore, there is a problem that the diameter of the air cylinder device for driving the output shaft must be set large.

An object of the present invention is to provide a transmission operating device capable of shortening the stroke of a shift lever without setting a large diameter of a cylinder device for driving an output shaft.

[0007]

A transmission operating device according to the present invention is a transmission operating device provided with a booster device for assisting a shifting operation force of a transmission, wherein the booster device comprises:
A cylinder chamber formed in the body, a piston slidably fitted in the cylinder chamber, an output shaft fixed to the piston and connected to a shift and select shaft, and an input coupled to a change lever. A transmission operating device including a shaft, and a control valve operated by the input shaft to control supply and discharge of fluid to and from the cylinder chamber, wherein the output shaft and the input shaft are disposed substantially parallel to each other. And a link bar, and the change lever is linked to an intermediate portion of the link bar.

According to the above-described means, since the change lever is connected to the intermediate portion of the link bar, when the stroke of the output shaft is the same, the input stroke of the input shaft is equal to the lever ratio of the link bar. Can only be set shorter.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the transmission operating device according to the present invention is configured as a transmission operating device mounted on a large vehicle such as a bus or a truck. As shown in FIG. 1, the transmission operating device is a shift and select shaft (hereinafter, referred to as a shift and select shaft) operated by a change lever 1.
It is called a shaft. 2). The shaft 2 is configured to execute a select operation by an operation in the axial direction A and to execute a shift operation by a rotation in the circumferential direction B, and is connected to the change lever 1 via a link mechanism. In the vicinity of the shaft 2, a plurality of shift rods 6 respectively corresponding to a predetermined transmission gear of the transmission are arranged in a direction orthogonal to the shaft 2, and are aligned in the axial direction of the shaft 2 to form a transmission case (not shown). It is slidably mounted on a shaft. A shift fork 5 and an engagement member (shift head) 4 are fixed to each shift rod 6, and the shift member 3 fixed to the shaft 2 can be selectively engaged with the engagement member 4. Has become. The shaft 2 performs a shift operation by rotating in the circumferential direction B with the shift member 3 engaged with the engagement member 4.

A booster device 10 is provided at one end of the shaft 2.
Are arranged in a direction orthogonal to the shaft 2 and mounted on the transmission case.
Is connected to one end of the shaft 2 via the lever 7 and the output-side connecting bar 8. Then, when the booster device 10 operates following the operation of the change lever 1 and the output shaft 20 operates in the axial direction C in FIG. 1, the shaft 2 rotates in the circumferential direction B, and the shift rod 6 already selected. Is actuated in the axial direction D, the shift fork 5 switches the sleeve (not shown) to execute the shift operation of the shift.

As shown in FIG. 1 and FIG. 2, the booster device 10 includes a body 11 formed in a shape in which two substantially cylindrical bodies are vertically arranged in parallel and connected to each other. Reference numeral 11 is mounted on a transmission case of a vehicle by a bracket 12. As shown in FIG. 2, a cylinder chamber 13 is formed in a cylindrical portion on the upper side of the body 11 in a substantially cylindrical hollow shape over the entire length. A piston 14 is slidably fitted in the cylinder chamber 13 in the cylinder center direction (the left-right direction in FIG. 2; hereinafter, referred to as the left-right direction). It is partitioned into a chamber 13b. Left supply and discharge ports 15 communicating with the left pressure chamber 13a are provided at both left and right ends of the body 11.
And a supply / discharge port 16 communicating with the right pressure chamber 13b.

A bearing member 17 formed in a cylindrical shape with a flange is fitted into a left end portion of the cylinder chamber 13 and fixed by a stopper ring 18. A left end of the output shaft 20 is inserted into a hollow portion of the bearing member 17. The part is slidably fitted in the left-right direction. The output shaft 20 passes through the center of the piston 14 and is fixed at an intermediate portion. The right end of the output shaft 20 protrudes rightward from the cylinder chamber 13 and is connected to the output-side connecting bar 8. A dustproof cover 19 is mounted between the right end of the output shaft 20 and the outer wall of the cylinder chamber 13 of the body 11 so as to cover a through hole of the output shaft 20 in the cylinder chamber 13.

An input shaft 21 is inserted through the lower end of the body 11 so as to be slidable in the left-right direction, and an input-side connecting bar 9 is mounted on a mounting screw portion 22 formed at the right end of the input shaft 21. ing. One end of a link bar 23 is rotatably connected to the input-side connecting bar 9 by a pin 24, and is fixed to the output-side connecting bar 8 in a slot 25 formed in the other end of the link bar 23. The pin 26 is fitted. A connecting rod 27 connected to the change lever 1 is located at a position near the input side connecting bar 9 in the middle of the link bar 23.
Are rotatably connected by a connection shaft 28.

The cylinder chamber 13 of the body 11 and the input shaft 21
A control valve device constituted by a pair of right and left control valves 30 and 30R is incorporated between the control valves 30 and 30R. As shown in FIG. 3, the left and right control valves 30 and 30R are configured to be substantially the same. And are arranged symmetrically. Therefore, in the following description, the structure will be described using the left control valve 30 as a representative. When it is necessary to distinguish between the left and right control valves, the right control valve is represented by adding R to the reference numeral of each component such as “30R”.

As shown in FIG. 3, the control valve 30 has a cylindrical support frame 33 whose left end opening is closed by a lifter support member 32 and whose right end surface is closed. The lifter support member 32 and the support frame 33 are stored in a storage chamber 31 formed in the body 11 and are fixed by a stopper ring 34. The other end of the storage chamber 31 is the left pressure chamber 13a.
Is connected to one end of the left supply / discharge port 15 connected to the support frame 33.
Has been established.

A cylindrical hole-shaped valve chamber 36 is formed coaxially between the left storage chamber 31 and the right storage chamber 31R in the body 11. A valve port 37 is formed in the closing wall at the right end of the support frame 33, and a valve seat 38 is formed around the valve port 37 on the end surface of the support frame 33 on the valve chamber 36 side. A valve body 39 is slidably fitted in the valve chamber 36 in the left-right direction, and the left end face of the valve body 39 is detachably seated on a valve seat 38. Left valve body 39 and right valve body 39
A spring 40 is interposed between the left valve body 39 and the left valve body 39R.
0 urges in a direction to close the left valve port 37 and the right valve port 37R. Note that the support frame is omitted in the right control valve 30R, and the valve port 37R and the valve seat 3 are not provided.
8R is formed on the right end wall of the valve chamber 36.

On the center line of the lifter support member 32, a cylindrical lifter 41 having a flange at an intermediate portion is slidably supported in the left-right direction.
And are opposed to each other. An exhaust passage 42 is formed by the hollow portion of the lifter 41. A spring 43 is provided between the intermediate flange portion of the lifter 41 and the left end wall of the support frame 33 in a stored state, and the lifter 41 is pressed against the left end surface of the lifter support member 32 by the spring 43. . One end of a push bar 44 fixed at a right angle to the left end of the input shaft 21 is in contact with the left end surface of the lifter 41, and the lifter 41 is connected to the input shaft 21 via the push bar 44.
Is to be pushed by. Push bar 44
An exhaust hole 45 is opened at a position opposed to the exhaust path 42 of the air conditioner.

At the left end of the body 11, a left dust cover 4 is provided.
6 is attached so as to cover the left opening of the left storage chamber 31 and the insertion hole 47 of the input shaft 21. Also, body 1
The right dustproof cover 46R is provided at the right end of the storage chamber 31 on the right.
It is mounted so as to cover the right opening of the insertion hole 47 of the R and the input shaft 21. The insertion hole 47 of the input shaft 21 communicates with an exhaust port 48 opened in the body 11. Further, a supply port 49 is opened at a position of the body 11 facing the valve chamber 36 so as to communicate with the valve chamber 36.

Next, the operation of the transmission operating device according to the above configuration will be described. In the following description, a shift operation in which the output shaft moves to the right will be described. However, a shift operation in which the output shaft moves to the left works in the same manner.

In FIG. 1, when the change lever 1 is operated to select, the shaft 2 is moved in the axial direction A, and the shift member 3 is engaged with the engagement member 4 of the desired shift rod 6. Subsequently, when the shift lever 1 is shifted, the operating force is transmitted to the link bar 23 by the connecting rod 27. By this operation force, as shown by the imaginary line in FIG. 2, the link bar 23 is slightly rotated about the pin 26 of the output-side connecting bar 9 and the input shaft 21 of the booster device 10 is moved to the input shaft. It is slightly moved rightward by the stroke Si.

As shown in FIG. 4, when the input shaft 21 is moved rightward following the operation of the change lever 1, the lifter 41 of the left control valve 30 moves rightward through the push bar 44. , And pushes rightward while contacting the valve body 39. When the lifter 41 contacts the valve body 39, the lifter 41
The exhaust path 42 is closed by the valve body 39. Further, when pushed rightward by the lifter 41, the valve element 39 is separated from the valve seat 38, and the valve port 37 is opened. When the valve port 37 is opened, the air supplied from the supply port 49 to the valve chamber 36 is changed from the valve chamber 36 to the valve chamber 36 as indicated by a broken line arrow in FIG.
It is introduced into the left pressure chamber 13a of the cylinder chamber 13 shown in FIG.

At this time, as shown in FIG. 4, in the right control valve 30R, the valve body 39R remains in a state of being seated on the valve seat 38R, so that the cylinder chamber 13 shown in FIG. Of the right pressure chamber 13b is supplied / discharged port 16 → storage chamber 31R → exhaust passage 42R of lifter 41R → input shaft 21
Is exhausted to the outside via the insertion hole 47 → the exhaust port.

By the operation of the control valves 30 and 30R,
As shown in FIG. 5, the piston 14 is moved rightward in the cylinder chamber 13, and the output shaft 20 fixed to the piston 14 is largely moved rightward by the output shaft stroke So. The rightward movement of the output shaft 20 is controlled by the output-side connecting bar 8 and the lever 7 to move the shaft 2.
1, the shaft 2 is rotated in the circumferential direction B in FIG. The rotation of the shaft 2 is transmitted to the shift rod 6 by the shift member 3 and the engagement member 4, and the shift operation is performed by moving the shift rod 6 in the axial direction D. That is, change lever 1
Is increased by the booster device 10.

As shown in FIG. 5, when the lever 7 is rotated by the output shaft 20 via the output-side connecting bar 8, the link bar 23 is rotated about the pin 24 of the input-side connecting bar 9. Since the input shaft 21 rotates, the input shaft 21 is not pushed back to the left.
0, 30R can maintain the operation described above. Therefore, even if the link bar 23 is installed between the output shaft 20 and the input shaft 21, the above-described shift operation can be properly maintained.

Thereafter, when the change lever 1 is returned from the shift position to the neutral position, the connecting rod 27 is moved in a direction opposite to the above, and the operating force is transmitted to the link bar 23. With this operation force, the link bar 23
Is slightly rotated about the pin 26 of the output-side connecting bar 8 in the opposite direction by the input shaft stroke Si, and the input shaft 21 of the booster device 10 is moved leftward as shown in FIGS. Return to the original position shown.

As shown in FIG. 3, when the input shaft 21 follows the operation of the change lever 1, the input shaft stroke S
When the push bar 44 is moved back to the original position by moving i leftward, the lifter 41 of the left control valve 30 is pushed back to the original position by the spring 43. When the lifter 41 retreats, the valve body 39 is seated on the valve seat 38 by the spring 40, and closes the valve port 37. When the valve body 39 is seated, the exhaust path 42 of the lifter 41 is separated from the valve body 39, so that the exhaust path 42 is opened. As described above, the control valve 3
0 and 30R return to the original state.

According to the above embodiment, the following effects can be obtained.

1) As shown in FIG.
Since one stroke Si can be shortened compared to the stroke So of the output shaft 20, the stroke of the shift lever can be reduced to the same level as a passenger vehicle even in a transmission operating device for a large vehicle such as a bus or a truck.

2) Even if the stroke Si of the input shaft 21 is shorter than the stroke So of the output shaft 20,
Since the output of the shaft 2 does not decrease, the diameter of the cylinder chamber 13 does not need to be set to be larger than in the related art.
The transmission operation device can be prevented from becoming large.

3) By arranging the control valve at a position separated from the input shaft in the body, the structure and mounting structure of the control valve can be simplified, thereby suppressing an increase in the cost of the transmission operating device. can do.

FIG. 6 is a front sectional view showing a booster device of a transmission operating device according to another embodiment of the present invention.
FIG. 2 is a front sectional view of a part of the control valve.

This embodiment is different from the above embodiment in that
The point is that a pair of control valves 30 and 30R are arranged around the input shaft 21. According to the present embodiment, the size of the booster device 10 in the vertical direction can be reduced.

[0034]

As described above, according to the present invention,
The stroke of the shift lever can be shortened without setting the diameter of the air cylinder device that drives the output shaft large.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a transmission operating device according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing a booster device.

FIG. 3 is a front sectional view showing a main part thereof.

FIG. 4 is a front sectional view showing the operation.

FIG. 5 is a partially cutaway front view for explaining the operation of the booster device.

FIG. 6 is a front sectional view showing a booster device of a transmission operating device according to another embodiment of the present invention.

FIG. 7 is an enlarged front sectional view of a portion of the control valve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Change lever, 2 ... Shaft (shift and select shaft), 3 ... Shift member, 4 ... Engagement member (shift head), 5 ... Shift fork, 6 ... Shift rod, 7 ... Lever, 8 ... Output side connecting Bar, 9 ...
Input-side connecting bar, 10 ... Booster device, 11
... body, 12 ... bracket, 13 ... cylinder chamber, 13
a: left pressure chamber, 13b: right pressure chamber, 14: piston, 1
5 left supply / discharge port, 16 right supply / discharge port, 17 bearing member, 18 stopper, 19 dustproof cover, 20 output shaft, 21 input shaft, 22 mounting screw part, 23 link bar, 24 ... Pin, 25 ... Long hole, 26 ... Pin, 27 ... Connecting rod, 28 ... Connection shaft, 30, 30R ... Control valve, 31 ... Storage chamber, 32 ... Lifter support member, 33 ... Support frame, 34 ... Stopper ring, 35 ... communication hole, 36 ... valve chamber, 37 ... valve port, 38 ... valve seat, 39 ... valve body, 40 ... spring, 41 ... lifter, 42 ... exhaust path, 43 ... spring, 44 ... push bar, 45 ... exhaust Holes, 46: dustproof cover, 47: insertion hole, 48: exhaust port, 49: supply port.

Claims (3)

[Claims] 1. A transmission operating device provided with a booster device for assisting a shifting operation force of a transmission, wherein the booster device is slidably movable in a cylinder chamber formed in a body thereof and the cylinder chamber. A fitted piston, an output shaft fixed to the piston and connected to a shift and select shaft, an input shaft associated with a change lever, and supply of fluid to the cylinder chamber operated by the input shaft And a control valve for controlling the discharge, wherein the output shaft and the input shaft are disposed substantially parallel to each other, and are connected by a link bar. A transmission operating device, wherein the change lever is linked to a part. 2. The transmission operating device according to claim 1, wherein the control valve is disposed at a position of the body separated from the input shaft. 3. The transmission operating device according to claim 1, wherein the control valve is disposed around the input shaft.