JPH1054459A - Transmission operating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily achieve size reduction and reduction of cost by reducing the required number of parts, simplifying a structure, and reducing the weight. SOLUTION: An actuator 23 provided with a cylinder housing 40 provided with cylinder holes 32a, 32b, a pair of large-diameter pistons 52, 52 to be fitted in the cylinder holes so as to be freely slid and for forming pressure chambers 22a, 22b on both ends, small-diameter pistons 51, 51 to be fitted to cylindrical parts 31, 31 formed on the large-diameter pistons and for forming pressure chambers 21a, 21b in the cylindrical parts, and a receiving lever 35 for receiving operating force from the small-diameter pistons is provided. The receiving lever is provided with a receiving part 35a positioned in the intermediate position in the axial direction of the small-diameter pistons and for directly receiving operating force from the small-diameter pistons, solenoid valves MVA to MVC for supplying and discharging compressed air in relation to respective pressure chambers are attached to the cylinder housing 40, and passages 27a, 27b, 28a, 28b for compressed air are provided on the cylinder housing.

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, and is particularly suitable for improving a select operating actuator of a transmission operating device, but is also applicable to an improvement of a shift operating actuator.

[0002]

2. Description of the Related Art In a bus or a truck having a large transmission, an actuator is incorporated in a transmission operation device so that a smooth transmission operation can be performed with a small force.

FIG. 17 is a longitudinal sectional view showing a select operation actuator of a conventional transmission operating device. In the actuator 1, an intermediate cylinder hole 3a and both end cylinder holes 3b having a larger inner diameter than the intermediate cylinder hole 3a are formed in a cylinder housing 2. In the middle cylinder hole 3a,
The main piston 4 is slidably housed, and the main piston 4 is attached to the piston rod 5. A pair of free pistons 6, 7 arranged outside the both ends of the piston rod 5 are housed in the cylinder holes 3b at both ends one by one.

A main piston 4 is provided in a cylinder hole 3a.
And two partition walls 2a and 2b, two pressure chambers 8 in the cylinder 3.
a, 8b are defined. The pressure chambers 9a and 9b are also defined by a pair of free pistons 6 and 7 having a larger pressure receiving area than the main piston 4.
Further, a pair of stoppers 10a and 10b are fixed in the cylinder housing 2 corresponding to the pair of free pistons 6 and 7, respectively.

In the actuator 1, a joint member 12 is fixed to the piston rod 5, and a receiving lever 13 rotatable about a lever shaft 14 is operated from the piston rod 5 via the joint member 12. Upon receiving the force, the received operation force is transmitted to an operation lever (not shown).

The actuator 1 has ports 15 at both ends,
16 to a pressure chamber 9 at both ends from a common tank (not shown).
The compressed air is supplied to the free pistons 6 and 7 so that the free pistons 6 and 7 respectively correspond to the corresponding stoppers 10a and 10b.
By supplying compressed air to the right pressure chamber 8b through the right intermediate port 18, the piston rod 5 comes into contact with the left free piston 6, as shown in FIG. Thus, receiving the lever 13 so that the posture corresponding to the position N ₃ shift pattern C receives the operating force. Further, from a state where all the pressure chambers 8a, 8b, 9a, 9b are opened to the atmosphere,
The free piston 6 and 7 in the same position as above, when supplying compressed air to the left side of the pressure chamber 8a through the left side of the intermediate port 17, receiving the lever 13 so is the posture corresponding to the position N ₂ shift pattern C Receive operating force. At this time, the piston rod 5 comes into contact with the right free piston 7 and is positioned.

Further, all the pressure chambers 8a, 8b, 9a,
When the compressed air is supplied only to the left pressure chamber 8a from a state in which the free piston 9b is opened to the atmosphere and the two free pistons 6 and 7 are in contact with the respective inner end walls, the main piston 4 slides rightward and receives lever 13 is in a corresponding position to the position N ₁ of the shift pattern C receives the operation force. Further, when all the pressure chambers are opened to the atmosphere and the compressed air is supplied only to the right pressure chamber 8b from a state in which the two free pistons 6 and 7 are in contact with the respective inner end walls, the main piston 4 moves to the left. sliding and receive lever 13 is positioned N ₄ shift pattern C
The posture corresponding to.

[0008]

However, the conventional actuator 1 uses the piston rod 5, the joint member 12, and the like, requires a large number of parts, has a complicated structure, is heavy, and is difficult to miniaturize. There was a disadvantage that the cost was high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional drawbacks, and has as its object to reduce the number of required parts, simplify the structure, reduce the weight, and reduce the size and cost of the transmission operation. It is to provide a device.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a cylinder housing having a cylinder hole and a cylinder housing slidably fitted to the cylinder hole and having a pressure at least at one end. A large-diameter piston defining a chamber, a small-diameter piston slidably fitted to a cylinder formed in the large-diameter piston to define a pressure chamber in the cylinder, and operation from the small-diameter piston An actuator having a receiving lever for receiving a force is provided, and the receiving lever has a receiving portion at an intermediate position in the axial direction of the small-diameter piston and directly receiving an operating force from the small-diameter piston. A transmission operating device, or a cylinder housing having a small-diameter cylinder hole and a large-diameter cylinder hole formed in series, and And an actuator including a small-diameter piston and a large-diameter piston that define a pressure chamber on at least one end side, and a receiving lever that receives an operating force from the small-diameter piston. A transmission operating device which has a receiving portion which is located at an intermediate position in the axial direction of the piston and directly receives an operating force from the small-diameter piston.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A transmission operating device according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing a main part of a transmission operating device according to a first embodiment of the present invention, FIG. 2 is a plan sectional view showing the select operation actuator of FIG. 1, and FIG. 4 is a side sectional view showing the select operation actuator, and FIG. 4 is a transverse sectional view of FIG.

As shown in FIG. 1, the transmission operating device includes an improved select operation actuator 23 and a shift operation actuator 24. The shift operation actuator 24 has only one free piston 6. The same one as shown in FIG. 17 is adopted. The select operation actuator 23 and the shift operation actuator 24 are operated by compressed air supplied from a common air tank 25.

The compressed air from the common air tank 25 is
In the case of the select operation actuator 23, the common path 2
6 and respective communication passages 27a, 27b, 28a, 28
b, the pressure is supplied to each of the pressure chambers 21a, 21b, 22a, 22b via the respective solenoid-operated switching valves MVA, MVB, MVC. In the shift operation actuator 24, the common path 19 and the respective communication paths 19a, 19b, 19
The pressure is supplied to each of the pressure chambers 8a, 8b, 9a via the respective solenoid-operated switching valves MVa, MVb, MVc.
Each of the electromagnetic switching valves opens the corresponding pressure chamber to the atmosphere in a non-excited state (OFF), and connects the corresponding pressure chamber to the air tank 25 in an excited state (ON). The control of each electromagnetic switching valve is performed by the controller 34. The shift operation actuator 24 is almost the same as that shown in FIG. 17 except that the free piston 6 is provided only on one end side, and therefore the same reference numerals are given to the same portions and the description of those portions is omitted.

As shown in FIG. 1, a select operation actuator 23 and a shift operation actuator 24 are provided.
Are arranged so as to correspond to the shift pattern C. Therefore, the select operation actuator 23 can be operated only when the main piston 4 of the shift operation actuator 24 is at the intermediate position of the first cylinder hole 3a. The receiving lever 35 receiving the operating force from the select operation actuator 23 is moved to the position N
_The shift operation actuator 24 can operate only when it is located at a position corresponding to any _one of N ₁ , N ₂ , N ₃ , and N ₄ .

The transmission operating device includes a receiving lever 3
5, the relay lever 36 attached to the other end of the lever shaft 14 simultaneously rotates as shown in FIG.
The select operation is performed by moving the operation lever 37 along the spline teeth 38a of the shaft 38 shown in FIG.

As shown in FIGS. 2 to 4, the select operation actuator 23 includes a cylinder housing 40 in which cylinder holes 32a and 32b are formed symmetrically, and a pair of large-diameter pistons 52 sliding in the cylinder holes. , 52, and a pair of small-diameter pistons 51, 51 slidably fitted to each other to define pressure chambers 21a, 21b at both ends;
a, 32b, and a pair of large-diameter pistons 52, 52 defining pressure chambers 22a, 22b at both ends, and an operating force directly received from the small-diameter pistons 51, 51 to apply the operating force to the operating lever 37. And a receiving lever 35 for transmitting the force to the receiving lever 35.

The cylinder housing 40 has a third block intermediate the first block 41 and the second block 42 at both ends.
The first block 41 and the second block 42 are fixed to the outer surfaces of both partition walls 44a, 44b of the third block 43 and are combined with each other, and the cylindrical portion 31 of the large-diameter piston 52 is provided. Blind holes 46a and 46b are respectively formed in the first block 41 and the second block 42 at positions corresponding to the blind holes 4a and 4b.
Communication passages 27a and 27b for communicating the pressure chambers 6a and 46b with the corresponding pressure chambers 21a and 21b are opened in the first block 41 and the second block 42. Then, the compressed air in the air tank 25 is supplied to the respective pressure chambers 21a and 21b via the respective solenoid-operated switching valves MVA and MVB inserted and attached to the blind holes 46a and 46b.

In the cylinder housing 40, a similar blind hole 47 is formed in the first block 41 at one end of the large-diameter cylinder hole 32a.
A communication passage 28a for communicating the pressure chamber 22a of the large-diameter cylinder hole 32a with the first block 41 is opened,
The communication path 28b for communicating the blind hole 47 with the pressure chamber 22b on the other end is formed by the first block 41 and the second block 42.
And through a third block 43. Common electromagnetic switching valve MV inserted and installed in blind hole 47
When C is turned on, the compressed air in the air tank 25 is simultaneously supplied to the pressure chambers 22a and 22b at both ends through the respective communication passages 28a and 28b.

Further, in the cylinder housing 40, Hall elements H _{1 to} H ₄ are arranged at _four intervals on the inner surface of the third block 43 at a position facing a magnet (not shown) fixed to the end of the receiving lever 35. Has been established.

The cylindrical portions 31, 3 of the large-diameter pistons 52, 52
Inside 1 are small-diameter cylinder holes 31a and 31b.
The large-diameter cylinder holes 32a and 32b are formed symmetrically in the first block 41 and the second block 42, respectively. Each of the small-diameter pistons 51, 51 and the large-diameter pistons 52, 52 is made of a synthetic resin material so as to form a substantially symmetric pair.
31b, 32a, and 32b are slidably fitted. The small-diameter pistons 51, 51 penetrate the corresponding partition walls 44 a, 44 b of the third block 43, and have inner ends that are both partition walls 44 a, 4.
4b, a pressing surface 51c for pressing the receiving lever 35 is provided at the inner end protruding between the two partition walls, and an annular seal member 53 is fitted on the outer periphery near the pressure chambers 21a, 21b. I'm wearing it.

The large-diameter piston 52 has a cylindrical portion 31 and a piston main body 52a integrally, and a part of the outer periphery of the cylindrical portion 31 is deleted to form a small-diameter portion 31c. A through hole 52c is formed in the boundary portion of the small diameter portion 31c along the diameter direction, and a gap 52d communicating with the through hole 52c is formed on the outer surface of the small diameter portion 31c. Then, the large-diameter piston 52 is connected to the distal end surface of the cylindrical portion 31 or the piston body 52a.
Selectively stops at a position where the outer end surface of each of them abuts the corresponding partition walls 44a, 44b or the inner end surfaces of the large-diameter cylinder holes 32a, 32b, and also serves as a stopper for positioning the receiving lever 35. In addition, the large-diameter piston 52
Is the axial middle position of the cylindrical portion 31 and the piston body 5
Annular seal members 56 and 57 are fitted around the outer periphery of 2a, and the pressure receiving area is set larger than the small-diameter piston 51, and the overall length is set shorter than the small-diameter piston 51.

The receiving lever 35 has a base fixed to the lever shaft 14, is rotatable about the lever shaft 14, engages with the small-diameter piston 51, and presses both pressing surfaces 51c, 51c.
It has a receiving portion 35a between the receiving portions 51c, and receives an operating force directly from the small-diameter piston 51 that comes into contact with the receiving portion 35a. The receiving portion 35a has a disk shape, and receives an operating force from the piston 51 on the outer peripheral receiving surface.

FIGS. 6 to 9 relate to the above embodiment of the present invention.
FIG. 5 is a cross-sectional view for explaining the operation of the transmission operating device. Each electromagnetic
The switching valves MVA, MVB, MVC are demagnetized and the pressure chambers 2
1a, 21b, 22a, 22b open to the atmosphere
Then, depress the clutch pedal and push the shift lever 39
Position N of the shift pattern C₁In FIG. 6,
The large solenoid valve MVC is kept in the demagnetized state.
The pressure chambers 22a, 22b at both ends of the
Being released, the large diameter piston has its pressure chamber 22a,
It stops at the inner end surface of 22b. Left electromagnetic switch
The exchange valve MVA is set in an excited state and compressed from the air tank 25.
Air is supplied to the small-diameter pressure chamber 21a on the left side,
The small-diameter piston 51 presses the receiving portion 35a rightward,
The receiving surface 35 a is a pressing surface 51 of the right-side small-diameter piston 51.
The receiving lever 35 stops at the position where it hits c. This stop
Is the position N of the shift pattern C.₁Corresponding to
Place S₁It is. This position S₁Is the Hall element of the position sensor
H₁And this position S₁At position F₁Or rank
Place R₁Shift operation to is possible. Hall element H ₁To
The detection signal detected by the controller enters the controller 34,
The magnetic switching valve MVA is demagnetized and the small-diameter pressure chamber 21a
Is open to the atmosphere.

[0024] Depress the clutch pedal, when moving the shift lever 39 to the shift pattern position F ₂ through the position N ₂ from the position N ₁ of C is 7, the common electromagnetic switching valve MVC is excited state Compressed air is simultaneously supplied from the air tank 25 to the pressure chambers 22a and 22b at both ends of the large-diameter piston 52. After a predetermined short time, the left electromagnetic switching valve MVA is turned on, and the left small-diameter pressure chamber 21a is turned on. Is supplied with compressed air. By the action of the compressed air, first, the left and right large-diameter pistons 52 slide in the direction approaching each other, and the right large-diameter piston 52
The right-side small-diameter piston 51 that moves with the movement pushes the receiving portion 35a to rotate the receiving lever 35 clockwise, and stops when the right-side large-diameter piston 52 hits the partition wall 44b. During this time, the torque generated by the leftward pressing force of the large-diameter piston 52 is greater than the pressing force of the left-side small-diameter piston 51 based on the compressed air in the small-diameter pressure chamber 21a. It turns in the direction. The position S ₂ where the receiving lever 35 thus rotated stops is the position N of the shift pattern C.
Corresponds to ₂ .

The position S ₂ is detected by the Hall element H _{2 of the} position sensor, and the detection signal enters the controller 34. The output signal from the controller 34 causes the shift operation actuator 24 to shift the shift pattern C to the position F ₂ . An operation is performed. That is, in FIG. 1, the electromagnetic switching valve MVa is turned on, and the air tank 25 is stored in the pressure chamber 8a.
Compressed air is supplied from the main piston 4 to the pressure chamber 8
shifting operation to the position F ₂ slides in the direction to reduce the b is performed. After that, each of the electromagnetic switching valves MVA, MVB, MV
C is demagnetized, and each pressure chamber is opened to the atmosphere. The reason why the electromagnetic switching valve MVA on the left side is turned on after a predetermined short time has elapsed since the common electromagnetic switching valve MVC is excited is to prevent the receiving lever 35 from overrun.

Next, the clutch pedal is depressed, and the shift lever 39 is moved from the position F ₂ of the shift pattern C to the position N _2.
And when moved to position F ₃ via position N ₃ ,
The shift operation from the position F ₂ of the shift pattern C to the position N ₂ is performed by the shift operation actuator 24.
That is, the electromagnetic switching valve MVc is turned on and the air tank 25
, Compressed air is supplied to the pressure chamber 9a, the free piston 6 comes into contact with the stopper 10a, is positioned, and the electromagnetic switching valve MVb is turned on while the electromagnetic switching valve MVa is turned off, so that the piston 4 slides to the neutral position. Next, in FIG. 8, the common electromagnetic switching valve MVC is in an excited state, and compressed air is simultaneously supplied from the air tank 25 to the pressure chambers 22a and 22b at both ends of the large-diameter piston 52.
After a predetermined short time, the right electromagnetic switching valve MVB is turned on, and compressed air is supplied to the right small-diameter pressure chamber 21b. Thereby, the left and right large diameter pistons 52 slide in the direction approaching each other by the action of the compressed air, and
a, 44b, stops when the right-side small-diameter piston 51 presses the receiving portion 35a to rotate the receiving lever 35 clockwise, and stops when the receiving portion 35a hits the left-side small-diameter piston 51.

In this case, the torque due to the rightward pressing force of the left large diameter piston 52 is greater than the torque due to the pressing force of the right small diameter piston 51 based on the compressed air in the small diameter pressure chamber 21b. The receiving lever 35 stops when the receiving portion 35a hits the left small-diameter piston 51. Thus the position S ₃ which receives the lever 35 is stopped of being rotated by corresponding to the position N ₃ shift pattern C. Position S ₃ is detected by the Hall element H ₃ of the position sensor, the detection signal enters the controller 34, the output signal from the controller 34, the position F of the shift pattern C by the shift operating actuator 24 that operates in the same manner as described above A shift operation to ₃ is performed. Thereafter, each of the electromagnetic switching valves MVA, MVB, MVC is demagnetized, and each pressure chamber is opened to the atmosphere.

When the clutch pedal is depressed, the shift lever 39 is moved from the position F ₃ of the shift pattern C to the position N _3.
And it is moved in the F ₄ through the position N _4, firstly, the shift operation is performed to the position N ₃ from the position F ₃ shift pattern C by the shift operating actuator 24 that operates in the same manner as described above. Next, in FIG. 9, while the common electromagnetic switching valve MVC remains in the demagnetized state, the right electromagnetic switching valve MVB
Is turned on, and compressed air is supplied to the small-diameter pressure chamber 21b on the right side. Thus, the right-side small-diameter piston 51 presses the receiving portion 35a to rotate the receiving lever 35 clockwise, and stops when the receiving portion 35a hits the left-side small-diameter piston 51. The position S ₄ where the receiving lever 35 rotated in this way stops corresponds to the position N ₄ of the shift pattern C. Position S ₄ is the Hall element H of the position sensor
₄ and the detection signal is
To the position F of the shift pattern C by the shift operation actuator 24 based on the output signal from the controller 34.
A shift operation to ₄ is performed. Each electromagnetic switching valve MVA, M
VB and MVC are demagnetized, and each pressure chamber is opened to the atmosphere.

According to the transmission operating device of this embodiment, the small-diameter piston 51 and the large-diameter piston 52 are each paired, and the pressure chambers 21a, 21 are provided at both ends.
Since b, 22a, and 22b are defined, it is possible to cope with a select operation between four positions, and there is an advantage that the structure is simplified and the manufacture is easy. Further, there is an advantage that the piston rod 5, the joint member 12, and the like become unnecessary, and the number of required parts is greatly reduced. further,
The electromagnetic switching valves MVA, MVB, MVC are directly mounted on the cylinder housing 40, and the pressure chambers 21a, 21b, 2
Communication passages 27a, 27b, 28a, 28 to 2a, 22b
Since b is opened in the cylinder housing 40, piping components can be omitted. Since the small-diameter piston 51 and the large-diameter piston 52 are made of synthetic resin, weight reduction is easy.

FIGS. 10 and 11 show a select operation actuator according to a second embodiment of the present invention. This select operation actuator 23A includes small-diameter cylinder holes 31a and 31b and large-diameter cylinder holes 32a and 32b.
b, a pair of small-diameter pistons 51, 51 slidably fitted in the small-diameter cylinder holes 31a, 31b to define pressure chambers 21a, 21b at both ends; A pair of large-diameter pistons 52, 52 slidably fitted in the large-diameter cylinder holes 32a, 32b and defining pressure chambers 22a, 22b at both ends are provided.
And, between the small-diameter cylinder holes 31a, 31b and the large-diameter cylinder holes 32a, 32b, the inner flange 41a,
42a are formed.

The small-diameter cylinder holes 31a and 31b and the large-diameter cylinder holes 32a and 32b are formed symmetrically in the first block 41 and the second block 42, respectively. Small-diameter pistons 51, 51 and large-diameter piston 5
Each of the cylinder holes 31a, 3 is made of a synthetic resin material so as to form a substantially symmetric pair.
1b, 32a and 32b are slidably fitted.

The large-diameter piston 52 is
a and an inward projection 52b penetrating the corresponding inner flange 41a, 42a of the first block 41 and the second block 42, and the piston body 52a has a corresponding inner flange 41a, 42a or large diameter. Cylinder bore 32
a, 32b, selectively stops at the position where it hits the inner end face,
It also serves as a stopper for positioning the receiving lever 35.

FIGS. 12 to 15 are sectional views for explaining the operation of the transmission operating device according to the second embodiment of the present invention. Each electromagnetic switching valve MVA, MVB, MVC is demagnetized the pressure chambers 21a, 21b, 22a, in a state in which 22b is opened to the atmosphere, depressing the clutch pedal, placing the shift lever 39 to position N ₁ of the shift pattern C And FIG.
, The common electromagnetic switching valve MVC remains demagnetized and the pressure chambers 22a, 22 at both ends of the large-diameter pistons 52, 52
b is open to the atmosphere, and the large-diameter piston hits the inner end surfaces of the pressure chambers 22a and 22b and stops. The electromagnetic switching valve MVA on the left side is in an excited state, and the air tank 2
5, compressed air is supplied to the left small-diameter pressure chamber 21a, the left small-diameter piston 51 presses the receiving portion 35a rightward, and the receiving portion 35a hits the pressing surface 51c of the right small-diameter piston 51. The receiving lever 35 stops at the depressed position. This stopped position corresponds to the position N _{1 of the} shift pattern C.
Is a position S ₁ corresponding to. This position S ₁ is detected by the Hall elements H ₁ of the position sensor, a shift operation to the position F ₁ or position R ₁ in the position S ₁ is made possible. Controller 3 detected signal detected by the Hall elements H ₁
In step 4, the electromagnetic switching valve MVA is demagnetized, and the small-diameter pressure chamber 21a is opened to the atmosphere.

[0034] Depress the clutch pedal, when moving the shift lever 39 to the shift pattern position F ₂ through the position N ₂ from the position N ₁ of C is 13, the common electromagnetic switching valve MVC is excited state And the air tank 25
And the pressure chambers 22a, 22b at both ends of the large-diameter piston 52
At the same time, compressed air is supplied, and after a predetermined short time,
The left electromagnetic switching valve MVA is turned on, and compressed air is supplied to the left small-diameter pressure chamber 21a. As a result, the left and right large diameter pistons 5 are first actuated by the action of the compressed air.
2 and 52 slide in the direction approaching each other, and the right-side small-diameter piston 51 moving with the movement of the right-side large-diameter piston 52 presses the receiving portion 35a to rotate the receiving lever 35 clockwise. When the large-diameter piston 52 on the right side hits the inner flange 41a, it stops. During this time, the left small-diameter piston 51 based on the compressed air in the small-diameter pressure chamber 21a
Since the torque due to the leftward pressing force of the large-diameter piston 52 is larger than the torque due to the pressing force, the receiving lever 35 rotates clockwise. Thus receives lever 35 which is pivoted to the position S ₂ which stops corresponds to the position N ₂ shift pattern C.

The position S ₂ is detected by the Hall element H _{2 of the} position sensor, and the detection signal enters the controller 34. The output signal from the controller 34 causes the shift operation actuator 24 to shift the shift pattern C to the position F ₂ . An operation is performed. After that, each electromagnetic switching valve MV
A, MVB, and MVC are demagnetized, and each pressure chamber is opened to the atmosphere. After a predetermined short time has elapsed since the common electromagnetic switching valve MVC was excited, the left electromagnetic switching valve MVA
Is turned on in order to prevent overrun of the receiving lever 35.

Next, the clutch pedal is depressed, and the shift lever 39 is moved from the position F ₂ of the shift pattern C to the position N _2.
And when moved to position F ₃ via position N ₃ ,
The shift operation from the position F ₂ of the shift pattern C to the position N ₂ is performed by the shift operation actuator 24.
Next, in FIG. 14, the common electromagnetic switching valve MVC is in an excited state, and the large-diameter piston 52
Compressed air is simultaneously supplied to the pressure chambers 22a and 22b at both ends of the right solenoid valve MVB after a predetermined short time has passed.
Is turned on, and compressed air is supplied to the small-diameter pressure chamber 21b on the right side. As a result, the left and right large-diameter pistons 52 slide in the direction approaching each other due to the action of the compressed air and stop when they hit the inner flanges 41a and 42a, and the right small-diameter piston 51 presses the receiving portion 35a. The receiving lever 35 is rotated clockwise, and stops when the receiving portion 35a hits the left small-diameter piston 51.

In this case, the torque due to the rightward pressing force of the large diameter piston 52 is greater than the torque due to the pressing force of the right small diameter piston 51 based on the compressed air in the small diameter pressure chamber 21b. Lever 35 is receiving part 35
This is because a hits the small-diameter piston 51 on the left and stops. Thus the position S ₃ which receives the lever 35 is stopped of being rotated by corresponding to the position N ₃ shift pattern C. Position S ₃ is detected by the Hall element H ₃ of the position sensor, the detection signal enters the controller 34, the output signal from the controller 34, shift operation by the shift operating actuator 24 to shift pattern position C F ₃ of Done. Then, each of the electromagnetic switching valves MVA, MVB,
The MVC is demagnetized, and each pressure chamber is opened to the atmosphere.

When the clutch pedal is depressed, the shift lever 39 is moved from the position F ₃ of the shift pattern C to the position N _3.
And is moved in the F ₄ through the position N _4, firstly, the shift operation from the position F ₃ shift pattern C by the shift operating actuator 24 to the position N ₃ is made. Next, in FIG. 15, while the common electromagnetic switching valve MVC remains in the demagnetized state, the right electromagnetic switching valve MVB is turned on, and compressed air is supplied to the right small-diameter pressure chamber 21b. Thus, the right-side small-diameter piston 51 presses the receiving portion 35a to rotate the receiving lever 35 clockwise, and the receiving portion 3
It stops when 5a hits the small-diameter piston 51 on the left side. The position S ₄ where the receiving lever 35 rotated in this way stops corresponds to the position N ₄ of the shift pattern C.
The position S ₄ is detected by the Hall element H _{4 of the} position sensor, and the detection signal enters the controller 34, and the shift operation of the shift operation actuator 24 to the position F ₄ of the shift pattern C is performed by the output signal from the controller 34. You. Each of the electromagnetic switching valves MVA, MVB, and MVC is demagnetized, and each pressure chamber is opened to the atmosphere.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made without adding new matter. For example, a small-diameter piston 51
As shown in FIG. 16, a notch 54 may be provided integrally at an intermediate position in the longitudinal direction, the receiving lever 35 may be passed through the notch 54, and the inner end face of the notch 54 may be a pressing surface 54c. . Further, the present invention can be applied not only to the actuator for select operation but also to the actuator for shift operation, and one of the paired large-diameter pistons 52, 52 or the pressure chamber at one end can be omitted.

[0040]

The present invention has the following effects. A cylinder housing having a cylinder hole, a large-diameter piston slidably fitted in the cylinder hole and defining a pressure chamber on at least one end side, and slidably fitted in a cylindrical portion formed in the large-diameter piston; An actuator having a small-diameter piston that defines a pressure chamber in the cylindrical portion and a receiving lever that receives an operating force from the small-diameter piston is provided, and the receiving lever is provided at an intermediate position in the axial direction of the small-diameter piston. By having the receiving portion that directly receives the operating force from the small-diameter piston, the receiving portions of the receiving lever directly receive the operating forces of the plurality of pistons, respectively. It is easy to reduce the weight. A small-diameter piston and a large-diameter piston slidably fitted into each of the small-diameter cylinder hole and the large-diameter cylinder hole formed in series with the cylinder housing to define a pressure chamber on at least one end side; An actuator having a receiving lever receiving an operating force from the small-diameter piston is provided, and the receiving lever has a receiving portion at an intermediate position in the axial direction of the small-diameter piston and directly receiving the operating force from the small-diameter piston. Accordingly, miniaturization and weight reduction can be easily performed similarly. At least one of the pistons also serves as a stopper for positioning the receiving lever, and a switching valve for supplying and discharging compressed air to and from each pressure chamber is mounted on the cylinder housing. Since the compressed air passage is provided, the size and weight can be further reduced easily, piping components can be omitted, and the number of required components can be reduced. The actuator is provided with a position sensor for detecting the position of the receiving lever, and the position sensor is provided with sensing means disposed at a plurality of positions on the cylinder housing side and a sensor attached to the receiving lever, so that the transmission operation can be performed. Can be automatically, smoothly and accurately performed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a main part of a transmission operating device according to a first embodiment of the present invention.

FIG. 2 is a plan sectional view showing the select operation actuator of FIG. 1;

FIG. 3 is a side sectional view showing the select operation actuator of FIG. 1;

FIG. 4 is a cross-sectional view of FIG.

FIG. 5 is a front sectional view of the transmission operating device according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view for explaining the operation of the transmission operating device according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view for explaining an operation of the transmission operating device according to the first embodiment of the present invention.

FIG. 8 is a cross-sectional view for explaining an operation of the transmission operating device according to the first embodiment of the present invention.

FIG. 9 is a cross-sectional view for explaining the operation of the transmission operating device according to the first embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a main part of a transmission operation device partially improved as a second embodiment of the present invention.

FIG. 11 is a side sectional view showing a select operation actuator used in the transmission operating device of FIG. 10;

FIG. 12 is a sectional view for explaining the operation of the transmission operating device shown in FIG. 10;

FIG. 13 is a sectional view for explaining the operation of the transmission operating device shown in FIG. 10;

FIG. 14 is a sectional view for explaining the operation of the transmission operating device shown in FIG. 10;

FIG. 15 is a sectional view for explaining the operation of the transmission operating device shown in FIG. 10;

FIG. 16 is a partial side view illustrating a modification of the embodiment of the present invention and corresponding to FIG. 3;

FIG. 17 is a longitudinal sectional view showing a select operation actuator of a conventional transmission operating device.

[Explanation of symbols]

MVA to MVC Electromagnetic switching valves H _{1 to} H ₄ Hall elements (sensing means constituting a position sensor) 21 a, 21 b, 22 a, 22 b Pressure chambers 23, 23 A Select operation actuator 24 Shift operation actuator 25 Air tank 26 Common path 27 a, 27b, 28a, 28b Communication passage 31 Cylindrical part 31a, 31b Small-diameter cylinder hole 32a, 32b Large-diameter cylinder hole 34 Controller 35 Receiving lever 35a Receiving part 40 Cylinder housing 46a, 46b, 47 Dead hole 51 Small-diameter piston 52 Large-diameter Piston

Claims (5)

[Claims] 1. A cylinder housing having a cylinder hole, a large-diameter piston slidably fitted in the cylinder hole and defining a pressure chamber on at least one end side, and a cylindrical portion formed in the large-diameter piston. An actuator having a small-diameter piston slidably fitted to the cylinder portion to define a pressure chamber in the cylindrical portion, and a receiving lever receiving an operating force from the small-diameter piston, wherein the receiving lever has the small-diameter A transmission operating device comprising a receiving portion at an intermediate position in the axial direction of the piston and directly receiving an operating force from the small-diameter piston. 2. A cylinder housing having a small-diameter cylinder hole and a large-diameter cylinder hole formed in series, and at least one end side slidably fitted into each of the small-diameter cylinder hole and the large-diameter cylinder hole. An actuator having a small-diameter piston and a large-diameter piston defining a pressure chamber, and a receiving lever receiving an operating force from the small-diameter piston, wherein the receiving lever has an intermediate position in the axial direction of the small-diameter piston. A transmission operating device having a receiving portion at a position for directly receiving an operating force from the small-diameter piston. 3. The transmission operating device according to claim 1, wherein at least one of the pistons also serves as a stopper for positioning the receiving lever. Transmission operating device. 4. The transmission operating device according to claim 1, wherein a switching valve for switching between supplying and discharging compressed air to and from each of the pressure chambers is attached to the cylinder housing. A transmission operating device, wherein a passage for compressed air is provided in a housing. 5. The transmission operating device according to claim 1, wherein the actuator is provided with a position sensor for detecting a position of the receiving lever, and the position sensor is provided on the cylinder housing side. A transmission operating device comprising: a plurality of sensing means disposed at a plurality of locations; and a sensing body attached to the receiving lever.