JP2000027990A - Speed change operation booster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move a cylinder body togetherwith a shift lever but not to move a piston rod and besides to relax an impact due to a shift operation force. SOLUTION: In a speed change boosting device formed that by boosting a speed change command operation force transmitted from a change lever (a speed change command operation means) through a link (a speed change command operation force transmitting means), the shift lever 4 of a transmission T is operated, the cylinder body of the power cylinder 2 of the booster is formed integrally with the shift lever 4, a damper lever is arranged at an internal part extending between a housing and a damper housing 48 independently from the shift lever 4 of the transmission T and mounted on a shift shaft Ta. With the damper lever interposed between a transmission body Tb and a damper mechanism, a damper mechanism 45 is arranged. and during shift operation, the rotation speed of a the shift shaft Ta is limited by the damper mechanism 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift operation booster mounted on a vehicle such as an automobile, and is particularly suitable for reducing an impact force based on the operating force of the shift operation booster.

[0002]

2. Description of the Related Art In conventional vehicles, particularly buses and trucks having a large transmission, an actuator that uses fluid pressure (particularly air pressure) is incorporated in a gear shift operation booster, and a smooth gear shift is performed with a light operating force of a change lever. You can operate it.

FIG. 14 shows an example of this type of speed change operation booster. In FIG. 1, a speed change operation booster 101 generally includes a power cylinder unit 102,
The control valve mechanism 103 includes an operation rod 104 whose end is connected to the change lever side.

[0004] The power cylinder unit 102 is slidably disposed in the cylinder main body 106 and two pressure chambers 107 in the cylinder main body 106.
The piston 108 includes a hollow piston rod 110 having a striker 109 attached to the outer peripheral surface of the piston 108 and having an end connected to a shift lever side of the transmission. The control valve mechanism 103 is provided in a hollow piston rod 110, and is opened and closed by an operation rod 104 slidably provided in the piston rod 110.

[0005] The relative displacement between the operating rod 104 and the piston rod 110 by operating the change lever causes the pressure chambers 107 a, 1 via the valve mechanism 103.
07b is introduced with high-pressure air on one side and low-pressure air on the other side,
By causing the piston rod 110 to follow the displacement caused by the operation of the operating rod 104 together with the piston 108, the light operating force of the change lever is boosted, and the shift lever of the transmission is rotated via the striker 109 to rotate the shift lever. , A device for performing a shift operation.

[0006]

However, the conventional transmission operating booster 101 has the following problems. (A) Since the housing of the booster 101 and the shift lever of the transmission are separate bodies, the structure is complicated.
It becomes large.

(B) The operating points of the operating force (output) of the booster 101 to the shift lever of the transmission and the shift command operating force (input) from the change lever are the same. However, the operation stroke of the change lever cannot be changed. Therefore, the operability is poor. There is no flexibility in mounting the booster 101 to the transmission, and the vehicle mountability is poor.

(C) Since the housing of the power cylinder unit 102 and the control valve mechanism 103 of the booster 101 has an integral structure, the operation stroke of the speed change operation lever cannot be changed as described above. Therefore, the operability is poor. There is no flexibility in mounting the booster 101 to the transmission, and the vehicle mountability is poor.

[0009] The present invention has been made in view of such a point,
The object of the present invention is to solve the above-mentioned problem, to have a variable operation stroke of the speed change operation lever, to have a degree of freedom of attachment to the transmission, and to reduce a shock based on a shift operation force by a damper mechanism. SUMMARY OF THE INVENTION It is an object of the present invention to provide a speed change operation booster that can be used.

Another object of the present invention is to improve the operability of the speed change operation lever and the ease of mounting on a vehicle, and move the cylinder body together with the shift lever to move the piston and the piston rod in their axial directions. SUMMARY OF THE INVENTION It is an object of the present invention to provide a speed change operation booster that does not move the piston rod and the piston rod is not worn or damaged.

[0011]

According to a first aspect of the present invention, there is provided a vehicle control system comprising: a shift command operating force transmitted from a shift command operating means via a shift command operating force transmitting means; A shift operation booster operated by a shift lever of a transmission is as follows.

An output shaft of a power piston, wherein a cylinder body of a power cylinder of the speed change operation booster is integrally formed with or disposed on the shift lever, and is slidably disposed in the cylinder body. An end is connected to the body of the transmission, or a vehicle body that fixes the body of the transmission,
A damper mechanism for limiting the shift speed is provided.

The damper mechanism may limit the rotation speed of a shift shaft, and the damper mechanism may be provided between a shift lever of the transmission and the transmission body. A damper lever may be provided on the shift shaft separately from the shift lever of the transmission, and the damper mechanism may be provided with the damper lever interposed between the transmission shaft and the transmission body.
The damper lever may be provided at an end of the transmission opposite the shift lever.

Further, the damper mechanism may have a restricting means for restricting a fluid movement accompanying rotation of the shift shaft, and the restricting means includes a damper cylinder fixed to the transmission body. And a damper piston that engages with a damper lever provided on the shift shaft, and it is also possible to restrict fluid movement by a gap between the inner surface of the damper cylinder and the outer surface of the damper piston.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. A shift operation booster of the present invention includes a cylinder body, a piston slidably disposed in the cylinder body, and dividing the cylinder body into two pressure chambers, and an output shaft connected to the piston. A power cylinder portion comprising a piston rod as a component, a valve body integrally formed with the cylinder body, or interlocked with the cylinder body, and slidably disposed in the valve body, and a valve A control valve having a mechanism, and an end of which is connected to a change lever side, and wherein the valve mechanism includes a control valve which is opened and closed by operation of the operation spool; Cylinder body is formed integrally with the shift lever of the transmission,
Alternatively, one end of the piston rod is fixed to a main body of the transmission or a vehicle body to which the transmission main body is fixed. Then, high-pressure air is introduced into one of the pressure chambers and low-pressure air (atmospheric pressure) is introduced into the other of the pressure chambers through the control valve by a relative displacement between the operation spool and the valve body. An apparatus for causing a main body to follow the displacement of the operation spool and to increase the operating force of the operation spool.

FIGS. 1 to 6 show a first embodiment of a speed change operation booster of the present invention. FIG. 1 is a schematic structural view when the speed change operation booster is mounted on a transmission. FIG. 3 is a longitudinal sectional view showing the structure of the booster, FIG. 3 is a bottom view of FIG.
Fig. 5 is a left side view of Fig. 2 when the booster is attached to the transmission, Fig. 5 is a right side view of Fig. 2, and Fig. 6 is a cross-sectional view of a main part taken along line VI-VI of Fig. 5. It is a figure and all show the time of non-operation.

In FIG. 1, a speed change operation booster 1 mounted on a transmission T includes a power cylinder 2 and a control valve 3.
And a shift lever 4 having one end thereof connected to a shift shaft Ta of the transmission T. The piston 5 of the power cylinder unit 2 is connected to the transmission T via its piston rod 6. Of the control valve 3
The operation spool 7 is connected to a change lever 9 via a link mechanism 8.

Then, by operating the change lever 9,
When the operation spool 7 is displaced, the compressed air is supplied to and discharged from the power cylinder unit 2 by the operation of the control valve 3 to which the compressed air is supplied, and the operation spool is moved through the cylinder body 10 of the power cylinder unit 2. 7, while operating the shift lever 4, the shift shaft Ta of the transmission T is operated.
Is rotated.

In FIG. 2 to FIG.
A cylinder hole 10a is formed in the cylinder body 10 of the first embodiment, and the cylinder hole 10a is formed between a pressure chamber (A) 11a and a pressure chamber (B) 11b by a piston 5 slidably disposed therein. It is partitioned. The piston 5 has
A piston rod 6 as an output shaft slidably penetrating through the cylinder body 10 is fixed. A control valve 3 is provided above the power cylinder unit 2 (on the shift shaft Ta side of the transmission T).
However, the spool axis is arranged so as to be parallel to the cylinder axis of the power cylinder unit 2.

In the valve body 20 of the control valve 3, an operation spool 7 having a small diameter at both ends and having a two-stage diameter is slidably supported while being guided at both ends by a guide member (not shown). And an exhaust chamber 21 is provided at a position corresponding to the center of the operation spool 7.
1 communicates with the atmosphere via an atmosphere chamber 23 formed by the cover 22.

The valve body 2 at both ends of the operation spool 7
0 is an air passage 2 formed inside the shift lever 4.
4, an air chamber (A) 25 a, which communicates with a compressed air source connected to a supply port 24 a at a side end of the shift lever 4.
An air chamber (B) 25b is formed. Of the valve body 20;
The operation of the operation spool 7 causes a space between each of the air chambers (A) 25 a and the air chambers (B) 25 b and the exhaust chamber 21.
Compressed air is supplied and discharged, and a working pressure chamber (A) 26a and a working pressure chamber (B) 26b are formed respectively, which communicate with the pressure chamber (A) 11a and the pressure chamber (B) 11b of the power cylinder unit 2. I have.

Both sides of the operation spool 7 of the control valve 3 are formed in two stages of large and small diameters, respectively.
Supply valve (A) having a ring-shaped seat member with a small seat diameter
27a, a supply valve (B) 27b, an exhaust valve (A) 28a having a large seat diameter ring-shaped seat member in a large diameter portion,
An exhaust valve (B) 28b is provided for each.

That is, the supply valve (A) 2 which is closed when not operated
7a is provided between the air chamber (A) 25a and the working chamber (A) 26a, and the exhaust valve (A) 28a which is open when not operating is provided between the working chamber (A) 26a and the exhaust chamber 21. The supply valve (B) 27b, which is closed during operation, is provided between the air chamber (B) 25b and the operation chamber (B) 26b.
8b are formed between the working chamber (B) 26b and the exhaust chamber 21, respectively.

Further, as shown in FIG. 2, near the end of the operation spool 7 on the air chamber (B) 25b side, between two spring receiving members 29a and 29b movably disposed on the outer periphery thereof. A spring 30 is provided, and both spring receiving members 29a, 2
9b, when the opposite side of the abutment surface of the spring 30 is not operated, the abutment surfaces of the operation spool 7
Slides to either side from the neutral position, the spring receiving member 29
a or 29b is engaged with the operation spool 7 and the other is kept in contact with the stepped portion of the valve body 20. According to the stroke of the operation spool 7, the spring 30
And a so-called neutral position holding mechanism (or reaction force mechanism) of the operation spool 7 is formed.

As shown in FIG. 6, in the exhaust chamber 21 formed in the valve body 20 corresponding to the center of the operation spool 7, the operation spool 7 is fitted to the operation spool 7 and guide members 41, 41 are provided. Is provided, and an input operated via the link mechanism 8 from the change lever 9 is transmitted to the operation spool 7 via the input transmission member 40. I have.

The booster 1 has a power piston position holding means 14 for holding the power piston at a non-operating position. As shown in FIG. 3, the power piston position holding means 14 is configured such that the end portion 6a of the piston rod 6 of the power cylinder portion 2 has two ball joints 15a, 15b.
And a rotation lever 16 having a screw mechanism whose length can be adjusted so that the lever rotation center point is located on the swinging neutral axis 17 of the shift shaft Ta of the transmission T. Machine body (or the vehicle body to which the transmission body is fixed) Tb
It is configured to be connected to.

Next, the operation of the speed change operation booster 1 will be described. In the inoperative position shown in FIG. 2, the air from the compressed air source is supplied to the air chamber (A) 25 a and the air chamber (B) 25 b of the valve body 20. The pressure chamber (A) 11a and the pressure chamber (B) 11b include an exhaust valve (A) 28a and an exhaust valve (B) 2
8b, which is open to the atmosphere via the exhaust chamber 21 and is in a non-operating state.

When the operation spool 7 is moved rightward in FIG. 2 via the input transmission member 40 by operating the change lever 9, first, the exhaust valve (B) 28b is closed, and then the supply valve (B) 27b Is opened. Then, the air chamber (B) 25
The air supplied to b is supplied to the pressure chamber (B) 11b of the power cylinder unit 2 via the supply valve (B) 27b and the working pressure chamber (B) 26b. Then, the air pressure tries to push the piston 5 to the left. The piston 5
Since the end 6a of the piston rod 6 is fixed to the transmission body Tb at the rotation lever rotation center point via the rotation lever 16, the piston 5 is
, The cylinder body 10 moves rightward in FIG. 2 by the introduced air pressure.

At this time, the pressure chamber (A) 11a of the power cylinder section 2 has a small volume, but the air in the pressure chamber (A) 11a is exhausted by the exhaust valve (A) 28a and the exhaust chamber 21. , Through the atmosphere chamber 23 by the exhaust cover 22,
Since the gas is discharged to the atmosphere, no pressure is generated in the pressure chamber (A) 11a. (At this time, the supply valve (A) 27a is closed and the exhaust valve (A) 28a remains open.)

When the cylinder body 10 of the power cylinder section 2 moves rightward, the valve body 20 of the control valve 3 closes the supply valve (B) 27b and the exhaust valve (B) with respect to the operation spool 7.
Since the valve body 20 moves in the opening direction, the valve body 20 rotates so as to follow the stroke of the operation spool 7 by the operation from the change lever 9, and the supply valve (B) 27b,
The exhaust valves (B) 28b are both kept closed. The shift shaft Ta is rotated by the rotation of the cylinder body 10 of the power cylinder portion 2 and the shift lever 4, so that the shift operation of the transmission T is performed.

At this time, the air pressure introduced into the working chamber (B) 26b of the valve main body 20 of the control valve 3 causes the operating spool 7 to move leftward due to the difference between the large and small diameters formed in two stages. , So that the acting force acts as a reaction force to the operation input.

As the cylinder body 10 of the power cylinder unit 2 rotates, the axial direction of the cylinder unit 2 tilts, and accordingly, the axial direction of the piston 5 also tilts. At this time, the rotation lever 16 pivotally connected to the end 6a of the piston rod 6 of the piston 5 rotates about a lever rotation center point attached to the transmission body Tb. 5
Of the transmission body Tb relative to the transmission body Tb
At that position, the power cylinder 2 simply rotates in accordance with the inclination of the power cylinder 2 in the axial direction.

When the shift operation of the transmission T is completed and the hand is released from the change lever 9 at the shift position, the command operation input to the operation spool 7 becomes zero. Spring 30 disposed on the end side of spool 7
Is held in the non-operation position by the urging force of the supply valve (B).
27b is in the closed position, and the exhaust valve (B) 28b is in the open position. Then, the air that has been introduced into the pressure chamber (B) 11b of the power cylinder unit 2 becomes the exhaust valve (B) 28b, the exhaust chamber 21,
Although the exhaust gas is exhausted to the atmosphere through the atmosphere chamber 23 by the exhaust cover 22, the force is not applied to return the transmission T to the neutral position, so that the transmission T is held at the shift position.

Next, in order to return the transmission T to the neutral position, the operation spool 7 is operated by operating the change lever 9.
Is moved to the left, the exhaust valve (A) 28a closes and the supply valve (A) 27a opens. Then, the air introduced into the air chamber (A) 25a of the valve body 20 is supplied to the supply valve (A) 2.
7a, is introduced into the pressure chamber (A) 11a of the power cylinder unit 2 through the working pressure chamber (A) 26a,
0 rotates to the left and returns to the neutral position. Even when the change lever 9 is operated from the neutral position and the operation spool 7 is moved to the left via the input transmission member 40, the same operation as described above is performed.

In FIG. 2, the operation stroke of the control valve 3 to the input transmission member 40 is different from the stroke of the power cylinder portion 2 from the shift axis Ta of the transmission T between the power cylinder portion 2 and the input transmission member 40. Can be changed in proportion to the ratio of the respective distances L1 and L2. That is, according to the figure, the operation stroke to the input transmission member 40 can be reduced to L2 / L1 with respect to the stroke of the power cylinder unit 2.

In the above embodiment of the present invention, the position where the input transmission member 40 acts on the shift lever 4 and the position where the power cylinder portion 2 acts on the shift lever 4 are different. If the distances L1 and L2 of the input transmission member 40 and the input transmission member 40 from the shift shaft Ta of the transmission T are made equal to each other, the respective operating positions on the shift lever 4 can be the same.

7 and 8 show a second embodiment of the speed change operation booster of the present invention. FIG. 7 is a longitudinal sectional view showing the structure of the booster, and FIG. 2 is a connection structure diagram of the operation spool of the control valve and the input transmission member as viewed from the line VIII-VIII, showing a non-operating state, and the same members as those in FIG. 2 are denoted by the same reference numerals and description thereof is omitted. In FIG. 7, on the upper part of the power cylinder unit 2 (on the shift shaft Ta side of the transmission T),
The control valve 53 is arranged such that its spool axis is
2 are arranged in parallel with the cylinder axis.

In the valve body 60 of the control valve 53 of the booster 1a, an operation spool 57 having a small diameter at both ends and having a two-step diameter is slid while being guided at both ends by guide members 62a and 62b. An air chamber 65 is provided in the valve body 60 movably supported and opposed to the center of the operation spool 57, and the air chamber 65 is provided with an air passage 64 formed inside the shift lever 4. Through a compressed air source connected to the upper end of the shift lever 4. An exhaust through hole 61 is provided on the spool axis of the operation spool 60, and the exhaust through hole 61 communicates with the atmosphere via the atmosphere chamber 23 formed by the cover 22.

On both ends of the operation spool 57, an exhaust passage (A) 61a and an exhaust passage (B) 61b communicating with the exhaust through hole 61 are formed. The air chamber 65, the exhaust passage (A) 61a, and the exhaust passage (B) 61b of the valve body 60.
Compressed air is supplied and discharged by the operation of the operation spool 57, and the operating pressure chamber (A) communicates with the pressure chamber (A) 11a and the pressure chamber (B) 11b of the power cylinder unit 52. ) 66a and a working pressure chamber (B) 66b are formed respectively.

Both sides of the operation spool 57 of the control valve 53
The exhaust valve (A) 68a and the exhaust valve (B) 68b each having a small-diameter ring-shaped seat member are provided in the small-diameter portion of the large-diameter portion. A supply valve (A) 67a and a supply valve (B) 67b each having a ring-shaped sheet member having a large seat diameter are provided.

That is, the air chamber 65 and the working chamber (A) 66
a between the working chamber (A) 66a and the exhaust passage (A) 61a.
A supply valve (B) 67b which is closed when not in operation and an exhaust valve (A) 68a which is open when not in operation and a supply valve (B) 67b which is closed when not in operation is provided between the air chamber 65 and the operation chamber (B) 66b. Passage (B)
61b, the exhaust valve (B) 68b which is open when not in operation.
Are formed respectively.

Further, as shown in FIG. 7, near the end of the operation spool 57 on the exhaust passage (B) 61b side, as shown in FIG. 7, a spring 3 is provided between the two retainers 29a and 29b.
0, a so-called neutral position holding mechanism (or a reaction force mechanism) of the spool is formed.

Also, as shown in FIG.
The input transmission member 42 is parallel to the axis of the operation spool 57,
It is slidably disposed while being guided by the guide member 43, and its end 42 a is fixed to the end 57 a of the operation spool 57 by the connecting member 44 and is linked to each other. Via the input transmission member 42, an input operated from the change lever 9 via the link mechanism 8 is transmitted to the operation spool 57.

The operation is performed in accordance with the description of the operation in the first embodiment, and the shift lever 4 is moved through the cylinder body 10 of the power cylinder section 52 while following the displacement of the operation spool 57. When operated, the shift shaft Ta of the transmission T is rotated.

FIG. 9 is a side view corresponding to FIG. 4 and shows a speed change operation booster according to a third embodiment of the present invention. FIG. 10 is a sectional view taken along line IX-IX of FIG. is there. The booster 1b includes a power cylinder unit 2,
There is a control valve 3 and a shift lever 4, and a damper mechanism 45 for limiting the shift speed at a position slightly away from the control valve 3 in the transmission T.

The damper mechanism 45 is provided with a bolt 47 on a flange 46a formed integrally with the housing 46 of the transmission T.
, A damper piston 49 slidably housed in the damper housing 48, and a damper lever 5 attached to the shift shaft Ta.
0, damper chambers 51a and 51b are formed on both sides of the damper piston 49 to limit the rotation speed of the shift shaft Ta in the shift operation by the damper action.

The damper housing 48 has an engagement hole 48a in which the damper piston 49 slides, and the both ends of the engagement hole 48a are formed by an integrally formed closing plate portion 48b on one end and a plug 37 fitted on the other end. Are sealed, and both damper chambers 51a,
A communication chamber 55 is provided at a position between the damper chambers 51a and 51b so as to communicate with the damper chambers 51a and 51b via the communication passages 54a and 54b. Have been.

The damper piston 49 has a length in the sliding direction shorter than the communication chamber 55, an outer diameter smaller than the inner diameter of the engagement hole 48a, and a gap C between the outer circumference and the inner circumference of the engagement hole 48a. Are formed so as to form a concave portion 49a having a U-shaped cross section at the center, and the spherical portion 50a at the tip of the damper lever 50 is inserted into the concave portion 49a, and the shift shaft Ta and the shift lever 4 It slides in conjunction with the rotation.

Then, the damper piston 49 moves leftward from the neutral position shown in FIG. 10 and, when its left end reaches a position outside the communication chamber 55, the damper piston 51 moves from the left damper chamber 51a to the communication chamber 5
The movement of the damper oil O to 5 is restricted by the gap C, and the leftward movement is suppressed. The damper piston 49 is
When the vehicle moves rightward from the position shown in FIG. 10 and the right end reaches a position outside the communication chamber 55, the flow of the damper oil O from the right damper chamber 51b to the communication chamber 55 is suppressed, and the rightward movement is restricted. .

The booster 1 according to the third embodiment.
The damper mechanism 45 b exerts its damper action as follows. When the transmission T is engaged (when the position is changed from the neutral position to the shift position), the damper lever 50 is moved together with the shift shaft Ta, for example, as shown in FIG.
, When rotated clockwise, the damper piston 49
Slides leftward from the neutral position, the damper oil O in the left damper chamber 51a passes through the left communication path 54a, the communication chamber 55, and the right communication path 54b, so that the right damper chamber 51
b, when the left end of the damper piston 49 reaches a position deviating from the communication chamber 55, the flow of the damper oil O from the left damper chamber 51a to the communication chamber 55 is suppressed, and a damper action is performed. Due to this damper action, the shift axis Ta
Is rotated by a predetermined amount from the neutral position, a damper force is applied to the shift shaft Ta via the damper lever 50.
This damper force acts as a reaction force to the shift operation force and acts in the direction opposite to the shift direction of the shift lever 4 and cancels the shift operation force after the synchronization is completed. An operation is performed.

When the transmission T is disengaged (moved from the shift position to the neutral position), the damper piston 49 slides rightward, so that the shift shaft Ta moves counterclockwise through the damper lever 50. It rotates and returns to the neutral position. At this time, the oil O in the right damper chamber 51b flows through the communication chamber 55 to the left damper chamber 51a, and the damper piston 49 smoothly moves to the right.

FIG. 11 is a side view corresponding to FIG. 4, and shows a main part of a booster according to a fourth embodiment of the present invention.
Since the shift lever 4 and the cylinder body 10 are the same as those of the second embodiment, the same parts are denoted by the same reference numerals. In the case of this booster 1c, a damper connecting portion 70 is provided to protrude laterally on the cylinder body 10 of the power cylinder integrated with the shift lever 4, and a damper is provided between the shift lever 4, the cylinder body 10 and the transmission body Tb. A damper housing 48 of the mechanism 45 is arranged and fixedly provided on the transmission body Tb.

As in the third embodiment, the damper mechanism 45 has a damper piston slidably housed in an engagement hole in the damper housing 48 and moves together with the damper piston. There is a damper projection 45a, and the damper connection portion 70 is engaged with the damper projection 45a.
Then, the movement of the shift lever 4 and the cylinder body 10 of the power cylinder integrated therewith are regulated by the damper mechanism 45 via the damper connecting portion 70. Damper mechanism 45
Of the third embodiment is the same as that of the third embodiment, and a description thereof will be omitted.

FIG. 12 is a longitudinal sectional view showing a damper mechanism of a booster according to a fifth embodiment of the present invention. In addition to the damper lever 50, the damper mechanism 45 of the booster 1d includes a damper housing 48 and a damper cylinder 7, which are connected to the housing 46 of the transmission T in a liquid-tight manner to the outside.
1, a damper piston 72, a receiving member 73, and both orifices 74 and 75 formed at both ends of the damper cylinder 71.

The damper housing 48 is filled with damper oil O, a damper lever 50 is inserted into the upper center thereof, a plug 37 is screwed into an opening at one end, and the other end is closed by a closing plate 48b. Have been. Further, inside the plug 37 and the closing plate portion 48b, cylinder supporting members 77, 78 for supporting the damper cylinder 71 in a liquid-tight manner on the axis of the damper housing 48 are provided. Since the outer diameter of the damper cylinder 71 is smaller than the inner diameter of the damper housing 48, the damper cylinder 48
An oil passage 80 communicating with an oil chamber 79 defined at the center of the damper housing 48 is formed between the oil passage 80 and the inner peripheral surface of the damper housing 48.

The damper piston 72 is connected to the damper lever 50.
The damper chamber 71a and 51b are slidably disposed in the damper cylinder 71 in association with the above, and are made of a synthetic resin, for example, a nylon material. On the other hand, a vertical hole 72a is formed substantially at the center of the damper piston 72 in the axial direction, and the tip spherical portion 50a of the damper lever 50 is inserted into the vertical hole 72a, and a contact portion with the damper piston 72 is formed. To
The convex portion 73a is fitted in fitting holes 72b and 72c formed in the axial direction of the damper piston 72, respectively, so as to interpose a receiving member 73 made of metal, for example, carbon steel. By interposing such a receiving member 73, the damper piston 72 and the damper lever 50 are connected while being in contact with each other.

The material of the receiving member 73 is preferably a low-alloy carbon steel material (for example, SCM415 material). Carburizing and quenching are applied to prevent and secure its durability. Note that each damper chamber 5 is provided in the damper piston 72.
1a, 51b and an oil chamber 7 communicating with an oil passage 80.
9 are formed, and check valves 86 and 87 are provided in the communication passages 72d and 72e, respectively, and the check valves 86 and 87 are respectively provided.
Means that the damper oil O is moved from the oil chamber 79 to the damper chamber 51
The valve is opened in the direction flowing to a and 51b, and is closed in the opposite direction.

When the gear of the transmission T is engaged (when the position is changed from the neutral position to the shift position), when the damper lever 50 is rotated together with the shift shaft Ta, for example, clockwise in FIG. 72 slides leftward from the neutral position with the left check valve 86 closed, so that the damper oil O in the left damper chamber 51a passes through the orifice 74 and the oil passage 80, and the oil chamber 7
9 and a damper action is performed. Due to this damper action, after the shift shaft Ta rotates a predetermined amount from the neutral position, the damper force is applied to the shift shaft T via the damper lever 50.
a. This damper force acts as a reaction force of the shift operation force and acts in a direction opposite to the shift direction of the shift lever 4 to cancel the shift operation force after the synchronization is completed.
There is no gear collision when the gear is engaged, and a smooth shift operation is performed.

When the transmission T is disengaged (moved from the shift position to the neutral position), the damper piston 72 slides rightward, so that the shift shaft Ta moves counterclockwise through the damper lever 50. It rotates and returns to the neutral position. At this time, the oil O in the oil chamber 79 passes through the communication passage 80 to open the check valve 86. For this reason, the oil chamber 79 and the damper chamber 51a communicate with each other via the communication passage 72d of the damper piston 72, and the damper piston 7
2 smoothly moves to the right.

Note that the present invention is not limited to the technology in the above-described embodiment, and various modifications, changes, and additions are possible. For example, in the above embodiment of the present invention, the control valve is a spool valve. However, the control valve may be a poppet valve or another means having a similar function. Further, the damper lever 50 is connected to the transmission T
May be provided at an opposite end (not shown) of the shift shaft Ta to which the shift lever 4 is attached. Further, the present invention can be applied to a case where the shift axis Ta is arranged along the up-down direction as shown in FIG.
In this case, a damper lever 50 that engages with a damper piston 72 slidable in a hole of the damper housing 48 is mounted laterally at the lower end of the shift shaft Ta, and the damper oil O
Can be injected from the upward injection port 90a of the injection cylinder 90.

[0061]

As is apparent from the above description, according to the speed change operation booster of the present invention, the cylinder body of the power cylinder of the speed change operation booster is integrally formed or disposed on the shift lever. At the same time, the output shaft end of the power piston slidably disposed in the cylinder main body is connected to the transmission main body or the vehicle body fixing the transmission main body, so that the operation stroke of the transmission operation lever is reduced. In addition, the required stroke is variable, and the degree of freedom of attachment to the transmission is increased, and the simplification and size reduction of the booster can be achieved. As it improves, and the arrangement of the control valve can be changed freely, it is possible to improve the mountability to the vehicle,
For this reason, according to the booster of the present invention, the productivity and the maintainability can be improved, and the damper mechanism for limiting the shift speed is provided. Can be eased. Further, according to the present invention, the damper mechanism may limit the rotation speed of the shift shaft, and a damper mechanism may be provided between the shift lever of the transmission and the transmission main body. Separately, a damper lever may be provided on the shift shaft, and a damper mechanism may be provided by interposing the damper lever between the shift shaft and the transmission body, or a damper lever may be provided at an end of the transmission opposite to the shift lever. The same effect as described above can be obtained. Further, the damper mechanism may have a restricting means for restricting a fluid movement accompanying rotation of the shift shaft. The restricting means includes a damper cylinder fixed to the transmission body and a shift shaft. The same effect can be obtained by providing a damper piston that engages with the damper lever and restricting fluid movement by a gap between the inner surface of the damper cylinder and the outer surface of the damper piston.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating a speed change operation booster according to a first embodiment of the present invention, and the booster is mounted on a transmission.

FIG. 2 is a longitudinal sectional view showing the structure of the booster of FIG.

FIG. 3 is a bottom view of FIG. 2;

FIG. 4 is a left side view of FIG. 2 when the booster is attached to a transmission.

FIG. 5 is a right side view of FIG. 2;

6 is a sectional view of a main part taken along line VI-VI in FIG. 5;

FIG. 7 is a longitudinal sectional view showing a speed change operation booster according to a second embodiment of the present invention and showing the structure of the booster.

8 is a connection structure diagram of the operation spool of the control valve and the input transmission member as viewed from the line VIII-VIII in FIG. 7;

FIG. 9 is a side view corresponding to FIG. 4, showing a speed change operation booster according to a third embodiment of the present invention.

FIG. 10 is a sectional view taken along line IX-IX of FIG. 9;

FIG. 11 is a side view illustrating a main part of a speed change operation booster according to a fourth embodiment of the present invention and corresponding to FIG. 4;

FIG. 12 is a sectional view showing a damper mechanism of a speed change operation booster according to a fifth embodiment of the present invention.

FIG. 13 is a cross-sectional view illustrating a damper mechanism of a speed change operation booster and related parts according to another embodiment of the present invention.

FIG. 14 is a longitudinal sectional view showing a conventional speed change operation booster.

[Explanation of symbols]

 1, 1a, 1b, 1c, 1d Transmission operation booster 2, 52 Power cylinder unit 3, 53 Control valve 4 Shift lever 5 Piston 6 Piston rod 7, 57 Operation spool 8 Link mechanism 9 Change lever 10 Cylinder body 11a, 11b Pressure chambers 12a, 12b Atmosphere chambers 13a, 13b Communication paths 15a, 15b Ball joint 16 Rotating lever 20, 60 Valve body 40 Input transmission member 41 Guide member 45 Damper mechanism 48 Damper housing 49, 72 Damper piston 50 Damper lever 51a, 51b Damper Chamber 55 Communication chamber 70 Damper connection part 74, 75 Orifice 79 Oil chamber 80 Oil passage C Gap O Damper oil (fluid) T Transmission Ta Shift shaft Tb Transmission body

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Abe 2-11-6 Shinmeicho, Higashimatsuyama-shi, Saitama Automobile Equipment Co., Ltd. Matsuyama Plant (72) Inventor Jun Kanno 2-chome, Shinmeicho, Higashimatsuyama-shi, Saitama 11-6 F-term in the Matsuyama Plant of Automotive Equipment Co., Ltd. (Reference) 3J067 AA01 AB13 AB14 DA24 DB06 DB13 FA18 FA82 FB21 FB61 FB63 FB81 FB83 GA01

Claims (7)

[Claims] 1. A shift operation booster for operating a shift lever of a transmission by boosting a shift command operating force transmitted from a shift command operating means via a shift command operating force transmitting means. A cylinder body of a power cylinder of the operating booster is integrally formed or disposed on the shift lever, and an output shaft end of a power piston slidably disposed in the cylinder body is provided with the gear shift. A shift operation booster, which is provided with a damper mechanism that is connected to a main body of the machine or a vehicle body that fixes the transmission body and that limits a shift speed. 2. The speed change operation booster according to claim 1, wherein the damper mechanism limits a rotation speed of a shift shaft. 3. The speed change operation booster according to claim 1, wherein the damper mechanism is provided between a shift lever of the transmission and the transmission main body. 4. The transmission according to claim 1, wherein a damper lever is provided on a shift shaft separately from a shift lever of the transmission, and the damper mechanism is provided with the damper lever interposed between the transmission shaft and the transmission body. The speed change operation booster as described in the above. 5. The speed change operation booster according to claim 4, wherein the damper lever is provided at an end of the transmission opposite to the shift lever. 6. The speed change operation booster according to claim 2, wherein the damper mechanism has a restricting means for restricting a fluid movement accompanying the rotation of the shift shaft. 7. A damper cylinder fixed to the transmission body and a damper piston engaged with a damper lever provided on the shift shaft, wherein the limiting means has an inner surface of the damper cylinder and the damper piston. The speed change operation booster according to claim 6, wherein fluid movement is restricted by a gap with an outer surface of the speed change operation.