JP3748701B2 - Transmission operating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a plurality of solenoid valves for supplying and discharging fluid pressure to and from a pressure chamber defined by a piston of an actuator, and a switching valve disposed in a communication passage that allows the plurality of solenoid valves to communicate with each other. The present invention relates to a transmission operation device that operates a transmission by rotating a lever with an operation force accompanying sliding of a piston.
[0002]
[Prior art]
In buses and trucks having a large transmission, an actuator is incorporated in the transmission operation device so that the transmission can be smoothly operated with a light force.
[0003]
FIG. 9 is a conceptual diagram showing a conventional transmission operating device employed in a large vehicle. This transmission operation device includes a shift operation actuator 1 and a select operation actuator 2. Both actuators 1 and 2 have pistons 1b and 2b formed integrally with the piston rods 1a and 2a, and free pistons 1c and 2c, respectively, thereby three pressure chambers 1d, 1e, 1f, 2d and 2e, respectively. , 2f are fluid-tightly defined, and compressed air is selectively supplied to and discharged from these pressure chambers to operate the transmission.
[0004]
Supply / discharge of compressed air is performed by solenoid valves MVA. Performed by MVB, MVC, MVa, MVb, and MVc. For example, in order to operate the actuators 1 and 2 at the neutral position N2 to the first speed position F1, the electromagnetic valve MVA is excited to supply compressed air to the pressure chamber 2d of the actuator 2, and the electromagnetic valve MVa is further excited. Then, the compressed air is supplied to the pressure chamber 1e of the actuator 1. Further, in order to operate the actuators 1 and 2 at the neutral position N2 to the reverse position R1, the solenoid valve MVA is excited to supply compressed air to the pressure chamber 2d of the actuator 2, and the solenoid valve MVb is further excited. Compressed air is supplied to the pressure chamber 1 d of the actuator 1.
[0005]
And in order to make it possible to move the vehicle even when a malfunction occurs in the solenoid valve, the solenoid valve is a dual type consisting of a pair, and one of the pair is When a failure occurs, both the actuators 1 and 2 can be operated by operating the other solenoid valve to move the vehicle.
[0006]
FIG. 10 is a cross-sectional view showing a transmission operating device provided with a pair of conventional dual type solenoid valves. In this device, each electromagnetic valve is composed of a similar pair. The electromagnetic valve MVA will be described. The housing hole H1 into which the left retainer 7 is inserted and the right retainer 7 are inserted. The hole H2 can be communicated with each other through the communication passage Hg, and the communication passage Hg and the pressure chamber Hc can communicate with each other through the passage Hh. A switching valve 11 is provided at the meeting portion between the passage Hg and the passage Hh. This switching valve 11 has a shuttle-type switching valve body 11a, which is arranged to be slidable left and right below the passage Hh, and when it is on the left side with respect to the passage Hh as shown in the figure. The right hole H2 is communicated with the pressure chamber Hc, and when it is on the right side with respect to the passage Hh, the left hole H1 is communicated with the pressure chamber Hc.
[0007]
Further, in this electromagnetic valve MVA, when the left solenoid valve MV1 is in a non-excited state and the solenoid SO of the right solenoid valve MV2 is excited, the solenoid valve body 14 moves downward and the seat 14a is separated from the retainer 7. At the same time, the sheet 14 b comes into contact with the core 15. Accordingly, the compressed air in the air tank 25 reaches the pressure chamber He through the inlet port 16, the passage 12, and the right pilot passage 7b, and is supplied to the hole H2 through the passage 7a. The body 11a is moved leftward as shown in FIG. 10 to close the space between the hole H1 and the pressure chamber Hc, and to connect the hole H2 and the pressure chamber Hc. Therefore, the compressed air is supplied to the pressure chamber Hc, pushes up the valve lifter 4, and opens the valve body 3 away from the valve seat 9 against the urging force of the spring SP <b> 1 disposed between the retainer 6. With this opening, the compressed air in the air tank 25 is supplied from the input chamber Ha to the output chamber Hb, and further supplied to the pressure chamber 2 d of the actuator 2 via the output port 17.
[0008]
When the solenoid SO of the right solenoid valve MV2 is demagnetized, the solenoid valve body 14 is returned to the position shown in FIG. 10 by the spring SP3, and the exhaust passage 15a is opened. Therefore, the compressed air in the hole H2 is discharged to the atmosphere, and the valve lifter 4 is restored by the urging force of the spring SP2 along with the discharge. Thereby, the compressed air in the pressure chamber 2d of the actuator 2 is released to the atmosphere via the outlet port 17, the output chamber Hb, the exhaust passage 4a, and the exhaust passage 10. When only the solenoid SO of the left solenoid valve MV1 is excited, compressed air is sent to the hole H1 through the left solenoid valve MV1 having the same structure as that of the solenoid valve MV2, and the shuttle type valve element 11a of the switching valve 11 is illustrated. Contrary to what is shown in FIG. 10, it is moved to the right and compressed air is supplied to the pressure chamber 2d of the actuator 2 through the electromagnetic valve MV1.
[0009]
[Problems to be solved by the invention]
However, the conventional transmission operating device is a double check valve having a shuttle-type switching valve body 11a in which the switching valve 1 slides in the direction of the passage Hg, and the switching valve body 11a is easily caught in the passage. It was difficult to use, complicated to process, and required a large space.
[0010]
The present invention has been made in view of such conventional drawbacks, and the object of the present invention is that there is no catch of the switching valve disposed between the solenoid valves, it is easy to use, easy to process, and has a large space. An object of the present invention is to provide a transmission operating device that is not required and can be easily assembled.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention includes an actuator having a piston that slidably fits in a cylinder hole of a cylinder housing to define a pressure chamber, and for supplying and discharging fluid pressure to and from the pressure chamber. A plurality of solenoid valves including a spare, and a switching valve disposed in a communication path for communicating the plurality of solenoid valves with each other, and a lever is rotated by an operating force accompanying the sliding of the piston to operate the transmission. In the transmission operating device, the switching valve communicates with an output passage communicating with the pressure chamber, a switching valve chamber formed in the communication passage, a disk-shaped switching valve body housed in the switching valve chamber, The switch valve chamber is formed with a pair of valve seats arranged opposite to each other, and the switch valve body is formed with both seat surfaces opposed to the pair of valve seats arranged opposite to each other and supplied to each other. The switching valve body is connected to the pair of valve seats by fluid pressure. Also characterized in that a selectively seated les.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A transmission operation 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 an embodiment of the present invention, and FIG. 2 is a partially broken plan view showing a select operation actuator and a shift operation actuator of FIG. 3 is an exploded plan view showing the select operation actuator of FIG.
[0013]
The transmission operation device includes a shift operation actuator 1 and a select operation actuator 23. The shift operation actuator 1 is substantially the same as the conventional one shown in FIG. The shift operation actuator 1 and the select operation actuator 23 are operated by compressed air supplied from a common air tank 25.
[0014]
In the shift operation actuator 1, the compressed air from the common air tank 25 passes through the common passage 19 and the respective output passages 19a, 19b, 19c to the respective pressure chambers 1e, 1d, 1f. , MVb, MVc, and the select operation actuator 23 via the common path 26 and the respective output paths 27a, 27b, 28a, 28b to the respective pressure chambers 21a, 21b, 22a, 22b. Supplied via solenoid valves MVA, MVB, MVC. Each solenoid valve opens the corresponding pressure chamber to the atmosphere when the solenoid is not excited (off), and communicates the corresponding pressure chamber with the air tank 25 when the solenoid is turned on (on). Each solenoid valve is controlled by the controller 34.
[0015]
Further, as shown in FIG. 1, the shift operation actuator 1 and the select operation actuator 23 are arranged so as to correspond to the shift pattern C. Accordingly, the select operation actuator 23 can be operated only when the main piston 1b of the shift operation actuator 1 is in the middle position of the cylinder hole. The shift operation actuator 1 can operate only when the lever 35 that receives the operation force from the select operation actuator 23 is at a position corresponding to one of the neutral positions N1, N2, N3, and N4 of the shift pattern C. .
[0016]
As shown in FIGS. 3 and 4, the select operation actuator 23 includes a cylinder housing 40 in which first cylinder holes 31a and 31b and second cylinder holes 32a and 32b are formed in parallel, and the first cylinder. A first piston 51 that slidably fits into the holes 31a and 31b and defines pressure chambers 21a and 21b at both ends, and a second cylinder hole 32a and 32b that slidably fits at both ends. A pair of second pistons 52, 52 that define the pressure chambers 22 a, 22 b, and a lever 35 that receives the operating force from both the pistons 51, 52 and transmits the operating force to an operating lever (not shown), The distance from the lever shaft 24, which is the rotation center of the lever 35, to the first piston 51 is made larger than the distance from the second piston 52.
[0017]
The cylinder housing 40 includes a first block 41 and a second block 42 at both ends and a third block 43 in the middle, and the first block 41 is provided on the outer surface of both partition walls 44 a and 44 b of the third block 43. The first block 41 and the second block 42 have inlet ports 16 and 16 connected to the air tank 25, as shown in FIG. A supply passage 12 for communicating these inlet ports 16, 16 with the respective electromagnetic valves MVA, MVB, MVC is opened through the first block 41, the second block 42 and the third block 43. A pair of blind holes 46a and 46b are formed in the first block 41 and the second block 42 on both ends of the first cylinder holes 31a and 31b, respectively, and a pressure corresponding to each of the blind holes 46a and 46b. Output passages 27 a and 27 b that communicate with the chambers 21 a and 21 b 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 electromagnetic valves MVA and MVB attached by being inserted into the blind holes 46a and 46b.
[0018]
The cylinder housing 40 is also provided with a pair of similar blind holes 47 in the portion of the first block 41 at a position deviated from one end side of the cylinder holes 31a and 32a. The blind holes 47 and the second cylinder holes An output passage 28a for communicating with the pressure chamber 22a of 32a is opened in the first block 41 portion, and an output passage 28b for communicating the blind hole 47 and the pressure chamber 22b on the other end side is provided for the first block 41 and the second block 41a. The second block 42 and the third block 43 are opened. By turning on the common solenoid valve MVC inserted and installed in the blind hole 47, the compressed air in the air tank 25 is simultaneously supplied to the pressure chambers 22a and 22b at both ends via the respective output passages 28a and 28b. It is like that.
[0019]
Further, as shown in FIG. 5, the cylinder housing 40 has a counterbore 40 a along the inner periphery of the first cylinder hole 31 a on the mutual contact surface side between the first block 41 and the third block 43. There is a similar counterbore in the cylinder hole 31b of the second block 42, and an annular packing 56 and a retainer 57 having a Y-shaped cross section are fitted into each counterbore 40a. The outer periphery of the piston 51 is sealed, and the annular packing 56 is pressed by the wall surface of the third block 43 and the retainer 57.
[0020]
The first cylinder holes 31a and 31b and the second cylinder holes 32a and 32b are formed symmetrically and substantially parallel to the first block 41 and the second block 42, respectively. Both the first piston 51 and the second pistons 52 and 52 are substantially symmetrically made of mechanical structural carbon steel or synthetic resin material, and are slidable in the respective cylinder holes 31a, 31b, 32a and 32b. And a part of the partition wall 44a, 44b passes through the corresponding partition walls 44a, 44b of the third block 43, and the lever 35 is pressed against the part protruding between the partition walls. A pressing surface is provided.
[0021]
The base of the lever 35 is fixed to the lever shaft 24, and is rotatable about the lever shaft 24. The lever 35 engages with the first piston 51 and is between the pressing surfaces 51c, 51c (see FIG. 5). A first piston 51 having a first receiving portion 35a and a second receiving portion 35b that engages with the second piston 52 and is between both pressing surfaces 52c, 52c, and contacts both receiving portions. And, it receives a pressing force directly from the second piston 52. The 1st receiving part 35a and the 2nd receiving part 35b are carrying out disk shape, and receive pressing force from each piston 51,52 by the outer peripheral receiving surface. A position sensor 54 is fixed between the first receiving portion 35a and the second receiving portion 35b.
[0022]
The first piston 51 integrally has a constricted portion 51a at a central position in the longitudinal direction. The constricted portion 51a has a notch (not shown), and the first receiving portion 35a of the lever 35 enters the notch. The end surface of the notch contacts the first receiving portion 35a to rotate the lever 35.
[0023]
The second piston 52 integrally includes a piston main body 52a and an inward projection 52b that passes through a corresponding one of the partition walls 44a and 44b, and the piston main body 52a corresponds to the corresponding partition walls 44a and 44b or the second partition 52a. It stops selectively at the position where it hits the end face of the cylinder holes 32a, 32b, and also serves as a stopper for positioning the lever 35. The second piston 52 has an inner end of the protrusion 52b as a pressing surface 52c, a pressure receiving area larger than that of the first piston 51, and a total length shorter than that of the first piston 51.
[0024]
Further, the second piston 52 has a bent hole 52d that is bent in the radial direction at the intermediate position through the center, and the bent hole 52d is opened at the front end surface and the outer periphery of the protrusion 52b. When the compressed air is supplied to the pressure chambers 22 a and 22 b and the second piston 52 slides, the bent holes 52 d and the outer peripheral surfaces of the second cylinder holes 32 a and 32 b and the outer periphery of the second piston 52 are formed. The air in the gap between the surfaces is released to smoothly slide the second piston 52.
[0025]
Further, in this transmission operating device, as shown in FIG. 6, as solenoid valves MVA for supplying and discharging fluid pressure to and from the pressure chamber 21a, paired solenoid valves MV1 and MV2 are used, and other solenoid valves MVB are used. The electromagnetic valve MVA is provided with a switching valve 61 disposed in a communication path 60 that allows the pair of electromagnetic valves MV1 and MV2 to communicate with each other, and the electromagnetic valve MVA corresponds to the switching valve 61. An output passage 27 a communicating with the pressure chamber 21 a is communicated, and a switching valve chamber 62 formed in the communication passage 60 and a disk-shaped switching valve body 63 accommodated in the switching valve chamber 62 are provided.
[0026]
In addition, the electromagnetic valve MVA has a pair of valve seats 62a and 62b arranged opposite to each other in the switching valve chamber 62, and the switching valve body 63 faces both of the pair of valve seats 62a and 62b and is arranged opposite to each other. The seat surfaces 63a and 63b are formed, and the switching valve body 63 can be selectively seated on either of the pair of valve seats 62a and 62b by the supplied fluid pressure. As shown in FIGS. 5 and 6, the electromagnetic valve MVA is supported by an individual plate-like mounting member 58, and a plurality of bolts 59 are screwed to attach the individual plate-like mounting member 58 to the housing 40. Since there is no particular difference inside compared with the conventional one shown in FIG. 10, detailed description thereof will be omitted. A communication passage 60 is provided between the output holes 27 of the pair of electromagnetic valves MVA1 and MVA2, and a switching valve 61 is disposed in the middle of the communication passage 60.
[0027]
FIG. 7 is a plan view showing a switching valve body used in the transmission operating device according to the embodiment of the present invention, and FIG. 8 is a sectional view taken along line XX of FIG. The switching valve body 63 is configured by using a circular iron plate 64 as a core material, and covering both surfaces of the iron plate 64 with a rubber material 65, and a plurality of iron protrusions 64a projecting in a semicircular outline in the radial direction on the outer periphery. And a rubber protrusion 65a, which is in the switching valve chamber 62 and moves up and down to form a fluid passage between adjacent protrusions at equal angular intervals.
[0028]
In addition, the switching valve body 63 is formed so that both seat surfaces 63a and 63b made of a rubber material 65 are symmetrical with each other. The iron plate 64 integrally has iron protrusions 64a protruding radially at equiangular intervals at three locations on the outer periphery, and a central through hole 64b is formed, and the through hole 64b is filled with the rubber material 65. ing. The iron protrusion 64a is smaller than the rubber protrusion 65a and is dimensioned so that the protrusion dimension in the radial direction of the switching valve body 63 is smaller than that of the rubber protrusion 65a.
[0029]
6, when the switching valve body 63 is in contact with the lower valve seat 62b of the switching valve chamber 62 in FIG. 6, the electromagnetic valve MV2 on the side far from the output passage 27a is connected to the output passage 27a. When the switching valve body 63 is in contact with the upper valve seat 62a of the switching valve chamber 62, the electromagnetic valve MV1 close to the output passage 27a communicates with the output passage 27a, and in any case, the pressure chamber 21a. Allows supply of compressed air to
[0030]
The operation of the transmission operating device according to the above embodiment of the present invention will be described. When the solenoid valves MVA, MVB, MVC are demagnetized and the pressure chambers 21a, 21b, 22a, 22b are opened to the atmosphere, the clutch pedal is depressed and the shift lever 39 is placed at the position N1 of the shift pattern C. 2 to 4, the common solenoid valve MVC remains in a demagnetized state, the pressure chambers 22a and 22b at both ends of the second pistons 52 and 52 are opened to the atmosphere, and the second pistons 52 and 52 are in the first state. The two pressure chambers 22a and 22b are in contact with the end surfaces and stopped. The left solenoid valve MVA is energized, compressed air is supplied from the air tank 25 to the first pressure chamber 21a on the left side, and the first piston 51 presses the first receiving portion 35a to the right, The lever 35 stops at a position where the second receiving portion 35b hits the pressing surface 52c of the right second piston 52 in a state where the first receiving portion 35a hits the pressing surface 51c of the first piston 51. This stopped position is a position S1 corresponding to the position N1 of the shift pattern C. This position S1 is detected by the position sensor 54, and the shift operation to the position F1 or the position R1 becomes possible at this position S1. The detection signal detected by the position sensor 54 enters the controller 34, the electromagnetic valve MVA is demagnetized, and the first pressure chamber 21a is opened to the atmosphere.
[0031]
When the clutch pedal is depressed and the shift lever 39 is moved from the position N1 of the shift pattern C to the position F2 via the position N2, the common solenoid valve MVC is energized, and the second piston 52 is moved from the air tank 25 to the excited state. Compressed air is simultaneously supplied to the pressure chambers 22a and 22b at both ends, and after a predetermined short period of time, the electromagnetic valve MVA is turned on, and the compressed air is supplied to the second pressure chamber 22a on the left side. As a result, first, the left and right second pistons 52, 52 slide in a direction approaching each other by the action of the compressed air, and the right second piston 52 presses the second receiving portion 35b to move the lever. 35 is turned clockwise and stops when it hits the partition wall 44b. During this time, the torque due to the pressing force to the left of the second piston 52 is larger than the torque due to the pressing force of the first piston 51 based on the compressed air in the first pressure chamber 21a. It turns to. The position S2 at which the lever 35 thus rotated corresponds to the position N2 of the shift pattern C.
[0032]
The position S2 is detected by the position sensor 54, the detection signal enters the controller 34, and the shift operation actuator 24 shifts the shift pattern C to the position F2 by the output signal from the controller 34. Thereafter, each solenoid valve MVA, MVB, MVC is demagnetized, and each pressure chamber is opened to the atmosphere. The reason why the left solenoid valve MVA is turned on after a predetermined short time has elapsed since the common solenoid valve MVC is in an excited state is to prevent the lever 35 from being overrun.
[0033]
Next, when the clutch pedal is depressed and the shift lever 39 is moved from the position F2 of the shift pattern C to the position F3 through the position N2 and the position N3, first, the position from the position F2 of the shift pattern C by the shift operation actuator 24 is changed. A shift operation to N2 is performed. Next, the common solenoid valve MVC is energized, and compressed air is simultaneously supplied from the air tank 25 to the pressure chambers 22a and 22b at both ends of the second piston 52. After a predetermined short period of time, the right solenoid valve MVB is Turned on, and compressed air is supplied to the first pressure chamber 21b on the right side. As a result, the left and right second pistons 52 slide in a direction approaching each other by the action of compressed air and stop when they hit against the partition walls 44a and 44b, and the first piston 51 presses the first receiving portion 35a. Then, the lever 35 is rotated clockwise, and stops when the second receiving portion 35b hits the second piston 52 on the left side.
[0034]
In this case, since the torque due to the rightward pressing force of the second piston 52 is larger than the torque due to the pressing force of the first piston 51 based on the compressed air in the first pressure chamber 21b, the lever 35 is The second receiving portion 35a hits the second piston 52 on the left side and stops. The position S3 where the lever 35 thus rotated stops corresponds to the position N3 of the shift pattern C. The position S3 is detected by the position sensor 54, the detection signal enters the controller 34, and the shift operation actuator 24 shifts the shift pattern C to the position F3 using the output signal from the controller 34. Thereafter, each solenoid valve MVA, MVB, MVC is demagnetized, and each pressure chamber is opened to the atmosphere.
[0035]
When the clutch pedal is depressed and the shift lever 39 is moved from the position F3 of the shift pattern C to F4 through the positions N3 and N4, the shift operation actuator 24 first shifts the position from the position F3 to the position N3. A shift operation is performed. Next, in FIG. 9, the common solenoid valve MVC remains in a demagnetized state, the solenoid valve MVB is turned on, and compressed air is supplied to the first pressure chamber 21b on the right side. Accordingly, the first piston 51 on the right side presses the first receiving portion 35a to rotate the lever 35 in the clockwise direction, and the first receiving portion 35a is moved to the first piston 51 and the second receiving portion. It stops when 35b hits the second piston 52 on the left side. The position S4 where the lever 35 thus rotated stops is the position N of the shift pattern C. _Four Corresponding to The position S4 is detected by the position sensor 54, the detection signal enters the controller 34, and the shift operation actuator 24 shifts the shift pattern C to the position F4 by the output signal from the controller 34. Each solenoid valve MVA, MVB, MVC is demagnetized and each pressure chamber is opened to the atmosphere.
[0036]
According to the transmission operating device according to the above-described embodiment, each electromagnetic valve MVA, MVB, MVC is composed of a pair of electromagnetic valves MV1, MV2, and any one of them becomes defective. However, when the other is operated, the passage is automatically switched by the switching valve 61 by the pressure of the compressed air, the transmission can be operated without any trouble, and the inner periphery of the first cylinder holes 31a and 31b can be operated. Counterbore holes 40a are formed, and annular packings 56 having a Y-shaped cross section are fitted into the counterbore holes 40a, and the outer periphery of the first piston 51 is sealed by the annular packings 56, so that the first piston When inserting 51 into the first cylinder holes 31a and 31b, the lip of the annular packing 56 can be prevented from being opened toward the insertion direction, and there is an advantage that assembly is easy.
[0037]
Further, since the pressure chambers 21a, 21b, 22a, and 22b are defined at both ends of the first piston 51 and the second piston 52, it is possible to cope with a selection operation between four positions, and the electromagnetic valve MVA. , MVB, MVC are directly attached to the cylinder housing 40, and output passages 27a, 27b, 28a, 28b to the pressure chambers 21a, 21b, 22a, 22b are opened in the cylinder housing 40. Parts can be omitted. If the first piston 51 and the second piston 52 are made of synthetic resin, the weight can be easily reduced.
[0038]
Further, since the iron plate 64 having the three iron projections 64a is used as the core material of the switching valve body 63, the iron projections 64a serve as a support when the rubber material 65 is molded, and the valve seat 62a in the switching valve chamber 62 is provided. , 62b is flat and easy to process, and the protrusion dimension of the iron protrusion 64a is smaller than the protrusion dimension of the rubber protrusion 65a, so that damage to the wall surface in the switching valve chamber 62 can be avoided.
[0039]
In addition, this invention is not limited by the said embodiment, A various deformation | transformation is possible in the range which does not add a new matter. For example, the present invention can be applied not only to the select operation actuator 23 but also to the shift operation actuator 1, and one of the paired second pistons 52, 52 may be omitted, or the pressure chamber on one end side may be omitted. it can. Further, by providing a third piston in parallel in addition to the first piston 51 and the second piston 52, it is possible to cope with a selection operation between five or six positions.
[0040]
【The invention's effect】
The present invention has the following effects. The switching valve is provided with a switching valve chamber having an output passage communicating with the pressure chamber and formed in the communication passage, and a disk-shaped switching valve body accommodated in the switching valve chamber, and is disposed opposite to the switching valve chamber. A pair of valve seats are formed, and the switching valve body is formed with both seat surfaces facing the pair of valve seats and arranged opposite to each other, and the switching valve body is placed in any of the pair of valve seats by the supplied fluid pressure. Since it can be selectively seated, there is no catch of the switching valve disposed between the solenoid valves, it is easy to use, easy to process, does not require a large space, and is easy to assemble. Further, since both seat surfaces of the switching valve body are formed symmetrically with each other, there is no mistake when the switching valve body is assembled, and a plurality of protrusions are provided around the switching valve body, and adjacent protrusions are provided. By forming the fluid passage between them, the fluid passage is surely formed.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a main part of a transmission operating device according to an embodiment of the present invention.
2 is a partially cutaway plan view showing the select operation actuator and the shift operation actuator of FIG. 1; FIG.
3 is an enlarged plan view of the select operation actuator shown in FIG.
4 is an enlarged plan view showing the select operation actuator of FIG. 2 in an enlarged manner. FIG.
FIG. 5 is a partially enlarged cross-sectional view of FIG.
FIG. 6 is a cross-sectional view for explaining the relationship between a pair of electromagnetic valves used in the transmission operating device according to the embodiment of the present invention.
FIG. 7 is a plan view showing a switching valve body used in the transmission operating device according to the embodiment of the present invention.
8 is a cross-sectional view taken along line XX in FIG.
FIG. 9 is a schematic configuration diagram of a conventional transmission operation device.
FIG. 10 is a cross-sectional view of a main part of a conventional transmission operating device.
[Explanation of symbols]
MVA to MVC solenoid valve
1 Actuator for shift operation
21a, 21b, 22a, 22b pressure chamber
23 Actuator for select operation
25 Air tank
26 common road
27a, 27b, 28a, 28b Output passage
31a, 31b First cylinder hole
32a, 32b Second cylinder hole
34 Controller
35 lever
35a first receiving part
35b second receiving part
40 Cylinder housing
51 First piston
52 second piston
60 communication path
61 Switching valve
62 Switching valve chamber
62a, 62b Valve seat
63 Switching valve
63a, 63b Sheet surface
64 Iron plate
65 Rubber material
64a Iron protrusion
65a Rubber protrusion

Claims (2)

  A plurality of solenoid valves including an actuator having a piston slidably fitted into a cylinder hole of a cylinder housing and defining a pressure chamber, and including a reserve for supplying and discharging fluid pressure to and from the pressure chamber; A switching valve disposed in a communication path for communicating the solenoid valves with each other, and a transmission operating device that operates a transmission by rotating a lever with an operating force accompanying sliding of the piston. Is provided with a switching valve chamber formed in the communication passage through which an output passage communicating with the pressure chamber communicates, and a disk-shaped switching valve body accommodated in the switching valve chamber, and disposed opposite to the switching valve chamber. A pair of valve seats is formed, and the switching valve body is formed with both seat surfaces facing the pair of valve seats and arranged opposite to each other, and the switching valve body is configured to be the pair of valves by the fluid pressure supplied. Features that can be selectively seated on any of the seats Transmission operation device to.   2. The transmission operating device according to claim 1, wherein both seat surfaces of the switching valve body are formed symmetrically to each other.

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