JP2005048924A - Hydraulic clutch operating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the leg-power in a clutch pedal operation in a hydraulic clutch operating device capable of connecting and disconnecting a clutch by the clutch pedal operation and a motor. <P>SOLUTION: This clutch operating device 5 connects and disconnects the clutch by supplying oil hydraulics to a slave cylinder 6 for connecting and disconnecting the clutch on the basis of the operation of a clutch pedal device 14 and the operation of the motor 16 driven by a clutch control signal, and comprises a hydraulic circuit 27 for manual operation and a hydraulic circuit for automatic operation. The hydraulic circuit 27 for manual operation has a second valve mechanism 45 opened by the operation of the clutch pedal device 14, and supplies the oil hydraulics to the slave cylinder 6. The hydraulic circuit 28 for automatic operation has first and second pistons 31, 41 operated by driving the motor, and closes the second valve mechanism 45 by their operations to supply the oil hydraulics to the slave cylinder 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hydraulic clutch operating device, in particular, a hydraulic type that connects and disconnects a clutch by supplying hydraulic pressure to a clutch connecting / disconnecting slave cylinder in response to operation of a clutch pedal device and operation of a motor driven by a clutch control signal. The present invention relates to a clutch operating device.

  In large vehicles such as buses and trucks, manual transmissions are still mainly used today. In this manual transmission, a clutch is provided between the engine and the transmission, and the shift lever of the driver's seat and the transmission are mechanically connected by a link mechanism such as a control rod. When shifting, it is necessary to disengage the clutch by depressing the clutch pedal (cut off the power between the engine and the transmission) and operate the shift lever. For this reason, when frequent shifts are required, a series of operations becomes a heavy burden on the driver.

  Therefore, in order to solve this problem, a transmission provided with a transmission ECU (Electronic Control Unit) for performing transmission shift control by an electric signal has been developed. In this case, since the link mechanism is not provided, the shift can be performed with a small force simply by operating the shift lever, and the burden on the driver regarding the shift operation is reduced.

Furthermore, in order to further reduce the burden on the driver regarding the shift operation, an automatic transmission is also provided which can be provided with a clutch actuator that automatically connects and disconnects the clutch and can perform a shift operation without stepping on the clutch pedal. Further, as disclosed in Patent Document 1, a transmission configured to be able to selectively switch between automatic shift and manual shift is also provided.
JP 2002-213497 A

  The apparatus disclosed in the publication is configured to supply hydraulic pressure to a slave cylinder for clutch engagement / disconnection by driving a motor or operating a clutch pedal, and includes a first cylinder having one piston therein, And a second cylinder having one large piston and one small piston. And a first hydraulic circuit that supplies hydraulic pressure to the slave cylinder by operating the clutch pedal, a second hydraulic circuit that supplies hydraulic pressure from the second cylinder to the slave cylinder, and a third hydraulic circuit that operates during automatic gear shifting. ing.

  In such a conventional apparatus, when the clutch connection / disconnection operation is performed by operating the clutch pedal, the piston of the master cylinder on the clutch pedal side, the two large pistons in the second cylinder, and the piston of the slave cylinder respectively In particular, the sliding resistance of the two large pistons in the second cylinder is large. For this reason, there exists a malfunction that the depression force of a clutch pedal becomes heavy. Further, since the entire apparatus has three hydraulic circuits, the air venting operation of the hydraulic circuit is troublesome.

  SUMMARY OF THE INVENTION An object of the present invention is to reduce the pedaling force for clutch pedal operation in a hydraulic clutch operation device that allows clutch clutch operation and clutch connection / disconnection by a motor.

  Another object of the present invention is to facilitate air bleeding work of a hydraulic circuit in a hydraulic clutch operating device.

  A hydraulic clutch operating device according to claim 1 is a device for connecting and disconnecting a clutch by supplying hydraulic pressure to a clutch connecting / disconnecting slave cylinder in response to operation of a clutch pedal device and operation of a motor driven by a clutch control signal. In this case, a manual operation hydraulic circuit and an automatic operation hydraulic circuit are provided. The manual operation hydraulic circuit has a valve mechanism that is opened by operation of the clutch pedal device, and supplies hydraulic pressure to the slave cylinder. The automatic operation hydraulic circuit has a hydraulic mechanism having a piston that is operated by driving of a motor, and closes a valve mechanism by the operation of the hydraulic mechanism to supply hydraulic pressure to the slave cylinder.

  In this device, when the clutch pedal device is operated, the valve mechanism of the manual operation hydraulic circuit is opened, and hydraulic pressure is supplied to the slave cylinder to operate the clutch. In this case, in the conventional device, the two hydraulic circuits of the hydraulic circuit that connects the clutch pedal device and the cylinder and the hydraulic circuit that connects the cylinder and the slave cylinder are composed of one hydraulic circuit for manual operation. The work for air bleeding becomes easier as compared with the conventional apparatus. Further, when the clutch pedal device is operated, the hydraulic pressure is supplied to the slave cylinder simply by opening the valve mechanism, so that it is not necessary to slide the two large pistons as in the conventional device, and the sliding resistance is reduced. It is greatly reduced. Therefore, the pedaling force of the clutch pedal device is reduced and the operation feeling is improved.

  According to a second aspect of the present invention, in the hydraulic clutch operating device according to the first aspect, the hydraulic mechanism of the hydraulic circuit for automatic operation includes a first piston operated by a motor, and a second piston operated by the operation of the first piston. And a communication oil passage provided between the first piston and the second piston.

  The hydraulic clutch operating device according to a third aspect is the device according to the second aspect, wherein the second piston is set at the initial position and moved from the initial position in a predetermined direction by the operation of the first piston, The valve mechanism is opened when the second piston is located at the initial position, and is closed as the second piston moves from the initial position.

  A hydraulic clutch operating device according to a fourth aspect of the present invention is the hydraulic clutch operating device according to any one of the first to third aspects, wherein the clutch operation is released when the clutch pedal device is operated while the clutch is operated by the automatic operation hydraulic circuit. And a clutch operation releasing means.

  Here, even when the clutch is operated by the automatic operation hydraulic circuit, the clutch operation can be released by operating the clutch pedal device. For this reason, even if the clutch operation becomes impossible due to a motor abnormality or the like during the automatic operation, the clutch operation can be released by operating the clutch pedal device.

  A hydraulic clutch operating device according to a fifth aspect is the device according to the fourth aspect, wherein the clutch operation releasing means returns the second piston to the initial position by operating the clutch pedal device.

  According to a sixth aspect of the present invention, there is provided the hydraulic clutch operating device according to the fifth aspect, wherein the clutch operation releasing means is operated by the operation of the clutch pedal device, and the second piston is operated by the operation of the third piston. And a check valve for releasing the hydraulic pressure being operated, and the third piston and the check valve are provided inside the second piston.

  In the present invention as described above, in the hydraulic clutch operating device capable of manual operation and automatic operation, the pedaling force of the clutch pedal operation can be reduced, and the operation feeling is improved. Further, since the hydraulic circuit is reduced as compared with the conventional apparatus, the air bleeding operation is facilitated.

(1) First embodiment
[Overall structure]
FIG. 1 shows an automatic transmission system including a hydraulic clutch operating device according to an embodiment of the present invention. In the figure, a clutch 3 including a dry single disc clutch disk is disposed between an engine 1 and a transmission 2. A gear transmission 4 is provided as an actuator for driving the transmission 2. A hydraulic clutch operating device 5 is provided as an actuator for driving the clutch 3. The clutch operating device 5 is connected to a slave cylinder 6 provided in the vicinity of the clutch 3 via a pipe.

  This system is provided with an engine ECU 8 and a transmission ECU 9 that can communicate with each other. For example, both can transmit and receive engine speed information and accelerator opening information. The engine ECU 8 controls the engine 1 and receives an accelerator opening signal from the accelerator pedal 10. The transmission ECU 9 mainly performs clutch connection / disconnection control and transmission 2 shift control, and outputs a clutch control signal to the clutch operating device 5 and a shift control signal to the gear transmission 4. Yes. Specifically, these control signals are signals for driving various motors. The transmission ECU 9 receives signals from various sensors. Specifically, an accelerator signal from the accelerator pedal 10, a shift position signal from the shift lever 11, a clutch stroke signal from the clutch pedal 12, a clutch stroke signal and a hydraulic signal from the clutch actuator 5, a clutch rotation signal from the clutch 3, and a vehicle speed from the transmission 2 A signal and a shift / select stroke signal from the gear transmission 4 are input to the transmission ECU 9.

  In the above-described system, an automatic operation in which the clutch ECU 9 automatically controls the clutch connection / disconnection operation and the gear shift operation by the transmission ECU 9 and a manual operation using the clutch pedal device 14 including the clutch pedal 12 and the cylinder 13 are possible. . The auto operation is used during normal travel, and the manual operation is used for slow speed travel, jogging travel in a pit, or travel for overcoming a step. In this manual operation travel, when the driver operates the clutch pedal 12, the hydraulic pressure is supplied from the cylinder 13 to the slave cylinder 6, and the clutch is connected and disconnected.

[Clutch operating device]
The structure of the clutch operating device 5 will be described in detail with reference to FIG. The clutch operating device 5 is configured to connect and disconnect the clutch 3 in response to an operation of the clutch pedal device 14 or an operation of the control motor mechanism 15, and the slave cylinder 6 of the clutch 3 is operated by the operation of the clutch pedal device 14. And a manual operation function for supplying hydraulic pressure to the slave cylinder 6 of the clutch 3 by driving the control motor mechanism 15 in accordance with a clutch control signal from the transmission ECU 9.

  The control motor mechanism 15 has a motor 16. The motor 16 may be a direct current motor, an alternating current motor, an SR motor, a stepping motor, or the like. The control motor mechanism 15 further includes a motion conversion mechanism 17 for converting the rotation of the motor 16 into a linear motion. The motion conversion mechanism 17 includes a rod 18, a worm wheel 19 that is engaged with one end of the rod 18 to form a crank mechanism, and a worm gear 20 that meshes with the worm wheel 19. When the worm gear 20 rotates, the worm wheel 19 rotates and the rod 18 linearly moves in the longitudinal direction. The motor 16 is disposed in the vicinity of the worm gear 20, and the rotating shaft 16 a is fixed to one end of the worm gear 20. As a result, the torque of the motor 16 is input to the worm gear 20. The rotation of the motor 16 is controlled by the clutch control signal from the transmission ECU 9 described above.

  The clutch operating device 5 has a cylinder 25 for automatic operation and a switching cylinder 26 for switching between automatic operation and manual operation. By these two cylinders 25, 26, a hydraulic circuit 27 for manual operation is provided. And a hydraulic circuit 28 for automatic operation.

<Auto operation cylinder>
The automatic operation cylinder 25 includes a cylindrical cylinder body 30, a first piston 31 slidably inserted into the cylinder body 30, and the first piston 31 at an initial position (the left end of the cylinder body 30 in FIG. 2). ) And a return spring 32 that urges. Further, a first valve mechanism 33 that is partially interlocked with sliding of the first piston 31 is provided in the cylinder body 30.

  In the cylinder body 30, an oil chamber A is formed, and the volume of the oil chamber A changes as the first piston 31 moves. The oil chamber A communicates with a reservoir tank (not shown) through an oil passage 34 formed at the end of the cylinder body 30.

  The first piston 31 can be moved against the spring force of the return spring 32 by the rod 18 of the control motor mechanism 15. When the rod 18 returns (moves in the left direction in FIG. 2), the return is returned. The spring 32 moves to the opposite side. The return spring 32 is disposed between a spring receiver 35 attached to the first piston 31 and a spring receiver 36 disposed at the right end of the oil chamber A of the cylinder body 30.

  The first valve mechanism 33 includes a rod 33a extending along the longitudinal direction of the cylinder body 30, and a seal portion 33b provided at one end of the rod 33a (the end on the oil passage 34 side). The other end of the rod 33a is slidably inserted into a hole 31a formed in the first piston 31. Further, a large diameter portion having a diameter larger than that of the other portion is formed at the other end of the rod 33a, and this large diameter portion is engaged with a spring receiver 35 attached to the first piston 31. It is possible. Further, a spring 37 is provided between the seal portion 33 b and the spring receiver 36.

  With such a configuration, when the first piston 31 is located on the initial position side, the rod 33a is moved in the same direction, and the seal portion 33b communicates between the oil chamber A and the oil passage 34 (reservoir tank). However, when the first piston 31 is moved to the oil chamber A side by the control motor mechanism 15, the movement restriction to the left side of the rod 33 a is released, so that the rod 33 a is moved to the oil passage 34 side by the spring 37. The oil chamber A and the oil passage 34 are blocked by the seal portion 33b. Note that a notch is formed in a part of the spring receiver 36, and in the state shown in FIG. 2, the oil chamber A and the oil passage 34 can communicate with each other.

<Switching cylinder>
The switching cylinder 26 includes a cylindrical cylinder body 40, a split-type second piston 41 slidably inserted into the cylinder body 40, and the second piston 41 at an initial position (on the right side of the cylinder body 40 in FIG. 2). A return spring 42 biased toward the end), a third piston 43 slidably provided inside the second piston 41, and a check ball 44 pressed by the third piston 43. In the cylinder body 40, a second valve mechanism 45 that is partially interlocked with the sliding of the second piston 41 is provided.

  In the cylinder body 40, an oil chamber B is formed on the left side portion of the second piston 41, and an oil chamber C is formed on the right side portion, and the volumes of the oil chambers B and C are moved by the movement of the second piston 41. Is changing. The oil chamber B communicates with the cylinder 13 of the clutch pedal device 14 via the oil passage 50 and communicates with the slave cylinder 6 via the oil passage 51.

  The second piston 41 is divided into a right part 411 and a left part 412. The right side portion 411 is formed in a cylindrical shape, and a support collar 52 for supporting the check ball 44 is provided inside. A concave portion into which the check ball 44 is fitted is formed at the distal end portion of the support collar 52. An oil chamber D is formed between the front end portion of the support collar 52 and the inner peripheral portion of the right side portion 411. The support collar 52 is formed in a cylindrical shape, and a coil spring 53 for urging the support collar 52 to the left side together with the check ball 44 is disposed inside. Further, the right portion 411 is formed with a plurality of holes 411a and 411b for communicating the outer peripheral side with the internal space, and the support collar 52 also has a position corresponding to the hole 411b of the right portion 411. A hole 52a is formed. These holes 411 a, 411 b and 52 a communicate with each other by a space S 1 formed on the outer periphery of the right portion 411 and a space S 2 formed on the outer periphery of the support collar 52. As a result, the oil chamber A of the automatic operation cylinder 25 passes through the oil passage 55 formed between the two cylinders 25 and 26, the holes 411a, 411b, and 52a, and the spaces S1 and S2. D and C communicate. The oil chamber C and the oil chamber D are always in communication.

  The return spring 42 is disposed between a spring receiver 60 attached to one end of the second piston 41 and a spring receiver 61 provided at the left end portion of the cylinder body 41. As in the spring receiver 36, the spring receiver 61 is partially cut out. In the state shown in FIG. 2 (the second valve mechanism 45 is open), the oil chamber B and the oil passage are provided. 50 can communicate.

  The third piston 43 is slidably inserted into a hole formed in the second piston 41. The tip end of the third piston 43 has a small diameter, and an oil chamber E is formed between the inner periphery of the right side portion 411 of the second piston 41. The tip of the third piston 43 can be in contact with and pressed against the check ball 44. Therefore, in a state where the check ball 44 is urged to the left side by the coil spring 53 together with the support collar 52 and pressed against the wall of the right side portion 411, the oil chamber D is similar to the oil chamber E in which the third piston 43 is disposed. In the state where the check ball 44 is pressed by the third piston 43 and moved to the right side, the oil chamber D and the oil chamber E are in communication with each other. The left piston 412 of the second piston 41 is provided with a hole 412a that allows the oil chamber E to communicate with the outer periphery, and a space S3 is formed between the outer periphery and the inner wall of the cylinder body 40. Yes. Thus, the oil chamber E communicates with the reservoir tank via the hole 412a, the space S3, and the oil passage 65 formed in the cylinder body 40.

  The second valve mechanism 45 has basically the same configuration as the first valve mechanism 33. That is, it has the rod 45a extended along the longitudinal direction of the cylinder main body 40, and the seal | sticker part 45b provided in the end (end part by the side of the oil path 50) of the rod 45a. The other end of the rod 45 a is slidably inserted into a hole 41 a formed in the left side portion 412 of the second piston 41, and the other end is large enough to be locked to the spring receiver 35. A diameter portion is formed. Further, a spring 66 is provided between the seal portion 45 b and the spring receiver 61. With such a configuration, in a state where the second piston 41 is located at the initial position (the position shown in FIG. 2), the rod 45a is moved in the same direction, and the seal portion 45b has the oil passage 50, the oil chamber B, and Although the oil passage 51 is communicated, when the second piston 41 is moved to the oil chamber B side, the movement restriction of the rod 45a is released, and the rod 45a is moved to the oil passage 50 side by the spring 66, The oil passage 50, the oil chamber B, and the oil passage 51 are blocked by the seal portion 45b.

<Hydraulic circuit>
With the configuration as described above, the hydraulic circuit 27 for manual operation and the hydraulic circuit 28 for automatic operation are configured. The hydraulic circuit 27 for manual operation includes a cylinder 13 of the clutch pedal device 14, oil passages 50 and 51 of the switching cylinder 26, a second valve mechanism 45 provided between the oil passage 50 and the oil passage 51, The pipe is provided between the cylinder 13 and the oil passage 50 and the pipe provided between the oil passage 51 and the slave cylinder 6. The hydraulic circuit 28 for automatic operation is provided between the automatic operation cylinder 25, the switching cylinder 26, the communication oil passage 55 that communicates both the cylinders 25, 26, and the switching cylinder 26 and the slave cylinder 6. It consists of piping.

[Auto operation]
In normal driving, an automatic operation is generally performed. During this automatic operation, the transmission ECU 9 shifts the transmission 2 in accordance with signals from various sensors.

  Specifically, the transmission ECU 9 outputs a clutch control signal to the control motor mechanism 15. As a result, the motor 16 rotates and the worm gear 20 rotates. For this reason, as shown in FIG. 3, the rod 18 moves to the right in the figure and pushes the first piston 31. When the first piston 31 moves to the right, the movement restriction of the rod 33a in the first valve mechanism 33 is released, the rod 33a moves to the right side by the spring 37, and the oil chamber A and the oil passage 34 are shut off by the seal portion 33b. Is done. Accordingly, the hydraulic oil in the oil chamber A is supplied to the switching cylinder 26 side through the communication oil passage 55. This hydraulic oil is supplied to the oil chamber C through the space S1, the hole 411b, the space S2, and the hole 52a. For this reason, the 2nd piston 41 moves to the left side of FIG. The movement of the rod 45a of the second valve mechanism 45 is released by the movement of the second piston 41 to the left, and the rod 45a moves to the left by the spring 66. As a result, the oil passage 50 and the oil passage 1 are blocked by the seal portion 45b. That is, the circuit on the clutch pedal device 14 side and the circuit on the slave cylinder 6 side are disconnected. Then, the hydraulic oil in the oil chamber B is supplied to the slave cylinder 6 side through the oil passage 51. As a result, the slave cylinder 6 operates and the clutch 3 is disconnected (disconnected).

  Next, in this state, the transmission ECU 9 outputs a shift control signal to the gear transmission 4 and drives a motor (not shown) to perform a gear shift of the transmission 2. Thereafter, the transmission ECU 9 outputs a clutch control signal to the control motor mechanism 15. As a result, the motor 16 rotates in the opposite direction, causing the worm gear 20 to rotate. For this reason, the rod 18 moves in the opposite direction, and the first piston 31 also moves in the same direction by the return spring 32. In this case, the hydraulic oil in the oil chamber C returns to the oil chamber A along the reverse path. For this reason, the second piston 41 moves to the right side, and the hydraulic oil supplied to the slave cylinder 6 returns to the oil chamber B. Therefore, the piston of the slave cylinder 6 is returned by a return spring (not shown), and the clutch 3 is in a connected state.

  At this time, the first valve mechanism 33 is pulled up to the left, and the seal of the seal portion 33b is released. Therefore, the oil chamber A communicates with the oil passage 34, and the oil chamber A communicates with the reservoir tank. During the above operation, the check ball 44 is urged by the coil spring 53 and the oil chamber D and the oil chamber E are shut off.

[Manual operation]
When performing the slow speed driving or the jogging driving in the pit, the transmission is set to the low speed side (for example, the first speed) and the clutch pedal 12 is operated. At the time of such manual operation, the control motor mechanism 15 is not operated, and the pistons 31 and 41 are located at the initial positions as shown in FIG. If the clutch pedal 12 is depressed in this state, hydraulic oil is supplied from the cylinder 13 to the switching cylinder 26 via the oil passage 50. At this time, since the second valve mechanism 45 communicates the oil passage 50 and the oil chamber B, that is, the oil passage 51, the hydraulic oil from the clutch pedal device 14 is directly supplied to the slave cylinder 6. For this reason, the clutch 3 is disconnected as described above. If the depression of the clutch pedal 12 is released, the hydraulic oil returns to the cylinder 13 side from the slave cylinder 6 via the oil passages 51 and 50, and the clutch 3 is in a connected state.

[When an error occurs]
Next, a description will be given of a procedure in the case where the clutch 3 is not returned due to an abnormality of the motor 16 or the like during the automatic operation. In this case, as shown in FIG. 3, the first piston 31 moves to the right side and the second piston 41 stops to the left side. Note that the cause of the stop of the motor 16 may be seizure or disconnection of the motor itself.

  In this case, the driver depresses the clutch pedal 12. Then, the seal portion 45b of the second valve mechanism 45 is forcibly moved to the right side by the hydraulic pressure from the clutch pedal device 14, and the oil passages 50 and 51 communicate with each other to increase the pressure. As a result, a force larger than the force urging left by the spring 53 acts on the third piston 43, and the oil chamber D and the oil chamber E communicate with each other. The oil chamber E always communicates with the reservoir tank via the space S3 and the hole 65, and the oil chamber D and the oil chamber C always communicate with each other, so that the oil chamber D and the oil chamber E communicate with each other. Thus, the oil chamber C communicates with the reservoir tank. For this reason, the hydraulic oil in the oil chamber C is returned to the reservoir tank.

  When the driver further depresses the clutch pedal 12, the oil pressure in the oil chamber B is higher than the oil pressure in the oil chamber C. Therefore, the second piston 41 moves to the right side, and the second piston 41 eventually reaches the initial position shown in FIG. Return to. Thereafter, when the driver releases the depression of the clutch pedal 12, the hydraulic pressure in the oil chamber B is lowered, and the hydraulic oil supplied to the slave cylinder 6 returns to the oil chamber B of the switching cylinder 26. Thereby, the clutch 3 will be in a connection state. In this state, since the second switching valve mechanism 45 communicates the oil passage 50 and the oil passage 51, the clutch pedal 12 can be engaged and disengaged.

(2) Second Embodiment The second embodiment differs from the first embodiment only in the clutch operating device, and the other configurations are completely the same. Hereinafter, a clutch operation device 5 ′ having a configuration different from that of the first embodiment will be described with reference to FIG.

[Clutch operating device]
Similarly to the above, the clutch operating device 5 ′ is connected to the clutch 3 in response to an operation of the clutch pedal device 14 or an operation of the control motor mechanism 15. 3 has a manual operation function for supplying hydraulic pressure to the slave cylinder 6 and an automatic operation function for supplying hydraulic pressure to the slave cylinder 6 of the clutch 3 in accordance with a clutch control signal from the transmission ECU 9. The clutch operating device 5 ′ has a cylinder 25 ′ for automatic operation and a switching cylinder 26 ′ for switching between automatic operation and manual operation.

<Auto operation cylinder>
As shown in FIG. 4, the auto-operation cylinder 25 ′ has basically the same configuration as that of the first embodiment, and only the position of the communication passage with the switching cylinder 26 ′ is different. That is, the automatic operation cylinder 25 ′ includes a cylindrical cylinder main body 30 ′, a first piston 31 slidably inserted into the cylinder main body 30 ′, and the first piston 31 at an initial position (in FIG. A return spring 32 that biases toward the left end of the main body 30 ′ and a first valve mechanism 33 are provided. In the cylinder body 30 ′, a communication oil passage 55 ′ with the switching cylinder 26 ′ is formed at the end (right end) of the oil chamber A.

<Switching cylinder>
The switching cylinder 26 ′ has a cylindrical cylinder main body 40 ′, a split-type second piston 41 ′ slidably inserted into the cylinder main body 40 ′, and a second piston 41 ′ in the initial position (in FIG. 4). A return spring 42 urging the cylinder body 40 ′ to the right end) side, a third piston 43 slidably provided inside the second piston 41 ′, and a check ball 44 pressed by the third piston 43. And the second valve mechanism 45.

  Here, the configurations of the cylinder body 40 'and the second piston 41' are different from those of the switching cylinder of the first embodiment, and the other configurations are the same.

  In the cylinder body 40 ′, an oil chamber B is formed on the left side portion of the second piston 41 ′, and an oil chamber C is formed on the right side portion, and the oil chamber B and the oil chamber B are moved by moving the second piston 41 ′. The volume of C changes. The oil chamber B communicates with the cylinder 13 of the clutch pedal device 14 via the oil passage 50 and communicates with the slave cylinder 6 via the oil passage 51.

  The second piston 41 'is divided into a right part 411' and a left part 412 '. The right portion 411 ′ is formed in a cylindrical shape, and a support member 52 ′ for supporting the check ball 44 is provided inside. A recess for supporting the check ball 44 is formed at the tip of the support member 52 '. A coil spring 53 ′ is disposed on the outer periphery of the support member 52 ′, and this coil spring 53 ′ urges the support member 52 ′ together with the check ball 44 to the left side. Further, the right portion 411 'is formed with a plurality of holes 411a' and 411b 'for communicating the outer peripheral side with the internal space. The hole 411a 'is provided to communicate the oil chamber E, in which the third piston 43 is disposed, with the reservoir tank via the space S1. The hole 411b 'is provided to communicate the oil chamber C with the oil chamber A of the automatic operation cylinder 25' via the communication oil passage 55 '. The oil chamber E and the oil chamber C are normally shut off by the check ball 44 (at the time of auto operation). Further, the left side portion 412 ′ is formed in a cylindrical shape except for the central portion in the axial direction, and the third piston 43 is inserted into the right side internal space, so that the oil chamber E and the oil chamber F described above are inserted. I know. Further, the rod 45a of the second valve mechanism 45 is slidably inserted into the left inner space, as in the first embodiment. The left portion 412 ′ is formed with a hole 412 a ′ that communicates the outer peripheral side with the oil chamber F. In addition, an oil passage 80 that communicates the internal space with the outside is formed in the central portion of the cylinder body 40 ′ in the longitudinal direction, and the oil chamber F is connected via the oil passage 80, the space S3, and the hole 412a ′. And a cylinder 13 of the clutch pedal device 14 are connected.

[Auto operation]
When the motor 16 is rotated during the automatic operation, the worm gear 20 is rotated and the first piston 31 is pushed to the right by the rod 18. Then, as shown in FIG. 5, the first valve mechanism 33 is activated, and the oil chamber A and the oil passage 34 are shut off. Accordingly, the hydraulic oil in the oil chamber A is supplied to the oil chamber C of the switching cylinder 26 'via the communication oil passage 55'. For this reason, 2nd piston 41 'moves to the left side (oil path 50 side) of FIG. Due to the movement of the second piston 41 ′ to the left side, the second valve mechanism 45 is activated and the oil passage 50 and the oil passage 51 are blocked. That is, the circuit on the clutch pedal device 14 side and the circuit on the slave cylinder 6 side are disconnected. Then, the hydraulic oil in the oil chamber B is supplied to the slave cylinder 6 side through the oil passage 51. As a result, the slave cylinder 6 operates and the clutch 3 is disengaged.

  Next, in this state, the transmission ECU 9 outputs a shift control signal to the gear transmission 4 and drives a motor (not shown) to perform a gear shift of the transmission 2. Thereafter, the motor 16 is rotated in the opposite direction by a signal from the transmission ECU 9, and the worm gear 20 is rotated to move the rod 18 in the opposite direction. Thereby, the first piston 31 is moved in the same direction by the return spring 32, and the hydraulic oil in the oil chamber C returns to the oil chamber A. For this reason, the second piston 41 ′ moves to the right, and the hydraulic oil supplied to the slave cylinder 6 returns to the oil chamber B. Therefore, the piston of the slave cylinder 6 is returned by a return spring (not shown), and the clutch 3 is in a connected state. At this time, the first valve mechanism 33 is pulled up to the left, the oil chamber A and the oil passage 34 are communicated, and the oil chamber A and the reservoir tank are communicated. During the above operation, the check ball 44 is urged by the coil spring 53 'and the oil chamber C and the oil chamber E (that is, the reservoir tank) are shut off.

[Manual operation]
During manual operation, the pistons 31 and 41 'are located at initial positions as shown in FIG. When the clutch pedal 12 is depressed in this state, hydraulic oil is supplied from the cylinder 13 to the switching cylinder 26 ′ via the oil passages 50 and 80. At this time, since the second valve mechanism 45 communicates the oil passage 50 and the oil passage 51, the hydraulic oil from the clutch pedal device 14 is directly supplied to the slave cylinder 6. For this reason, the clutch 3 is disconnected as described above. If the depression of the clutch pedal 12 is released, the hydraulic oil returns to the cylinder 13 side from the slave cylinder 6 via the oil passages 51 and 50, and the clutch 3 is in a connected state. During the manual operation, the hydraulic oil from the clutch pedal device 14 is also supplied to the oil chamber F via the oil passage 80 and the hole 412a ′. As a result, the third piston 43 is pushed to the right, and the check ball 44 is pushed in the same direction. As a result, the oil chamber C and the oil chamber E communicate with each other, and the oil chamber C (and thus the oil chamber A) communicates with the reservoir tank.

[When an error occurs]
Next, a description will be given of a procedure in the case where the clutch 3 is not returned due to an abnormality of the motor 16 or the like during the automatic operation. In this case, as shown in FIG. 5, the first piston 31 moves to the right side and the second piston 41 ′ moves to the left side and stops. In this case, the driver depresses the clutch pedal 12. Then, hydraulic oil is supplied from the cylinder 13 of the clutch pedal device 14 to the oil chamber F through the oil passage 80 and the hole 412a ′. As a result, the third piston 43 is pushed to the right, the check ball 44 is pushed in the same direction, and the oil chamber C and the oil chamber E communicate with each other. For this reason, the hydraulic oil accumulated in the oil chamber C is returned to the reservoir tank via the oil chamber E and the hole 411a ′. For this reason, 2nd piston 41 'moves to the right side, and 2nd piston 41' returns to the initial position shown in FIG. 4 soon. Thereafter, when the driver releases the depression of the clutch pedal 12, the hydraulic oil supplied to the slave cylinder 6 returns to the oil chamber B of the switching cylinder 26. Thereby, the clutch 3 will be in a connection state. In this state, since the second switching valve mechanism 45 communicates the oil passage 50 and the oil passage 51, the clutch pedal 12 can be engaged and disengaged.

(3) Effects of each embodiment In each of the above embodiments, in manual operation, the hydraulic pressure is directly supplied from the cylinder 13 of the clutch pedal device 14 to the slave cylinder via the second valve mechanism. Therefore, it is not necessary to operate the piston provided in the hydraulic mechanism as in the conventional device, and the pedaling force of the clutch pedal is reduced and the operation feeling is improved.

  Further, since the hydraulic circuit constituting the apparatus of each embodiment is composed of two circuits, a hydraulic circuit 27 for manual operation and a hydraulic circuit 28 for automatic operation, the air venting operation of the hydraulic circuit is performed by these circuits. These two hydraulic circuits may be executed, and the work for air bleeding becomes easier as compared with the conventional apparatus.

(4) Modifications The configuration of the valve mechanisms 33 and 45 in each of the above embodiments is not limited to the configuration shown in the embodiments, and various modifications are possible. For example, the opening / closing control of each valve mechanism is mechanically interlocked with the movement of the piston, but the valve mechanism may be controlled to open / close independently of the piston, or may be configured to be interlocked electrically. Also good.

1 is a schematic configuration diagram of a transmission system. The cross-sectional block diagram of the clutch operation apparatus by 1st Embodiment. Cross-sectional configuration diagram of the clutch operating device according to the first embodiment (during automatic operation) The cross-sectional block diagram of the clutch operating device by 2nd Embodiment. Sectional configuration diagram of clutch operating device according to second embodiment (during automatic operation)

Explanation of symbols

5 Clutch operating device 6 Slave cylinder 12 Clutch pedal 13 Cylinder 14 Clutch pedal device 16 Motor 25, 25 ′ Automatic operation cylinder 26, 26 ′ Switching cylinder 27 Manual operation hydraulic circuit 28 Automatic operation hydraulic circuit 31 First piston 41, 41 'second piston 45 second valve mechanism 55, 55' communication oil passage

Claims (6)

A hydraulic clutch operating device that receives and operates a clutch pedal device and a motor driven by a clutch control signal, supplies hydraulic pressure to a clutch connecting / disconnecting slave cylinder and connects / disconnects the clutch;
A manual operation hydraulic circuit that has a valve mechanism that is opened by operation of the clutch pedal device and supplies hydraulic pressure to the slave cylinder;
A hydraulic mechanism having a piston that is operated by driving of the motor; and an automatic operation hydraulic circuit that supplies hydraulic pressure to the slave cylinder by closing the valve mechanism by the operation of the hydraulic mechanism;
A hydraulic clutch operating device. The hydraulic mechanism of the hydraulic circuit for automatic operation is
A first piston actuated by the motor;
A second piston actuated by actuation of the first piston;
A communication oil passage provided between the first piston and the second piston;
The hydraulic clutch operating device according to claim 1, comprising: The second piston is set at an initial position and moved in a predetermined direction from the initial position by the operation of the first piston,
The valve mechanism is in an open state when the second piston is located at the initial position, and is in a closed state as the second piston moves from the initial position.
The hydraulic clutch operating device according to claim 2.   The clutch operation release means for releasing the clutch operation when the clutch pedal device is operated in a state where the clutch is operated by the automatic operation hydraulic circuit. Hydraulic clutch operating device.   The hydraulic clutch operating device according to claim 4, wherein the clutch operation releasing means returns the second piston to an initial position by operating the clutch pedal device. The clutch operation release means includes a third piston that is operated by operation of the clutch pedal device, and a check valve that is operated by the operation of the third piston to release the hydraulic pressure that operates the second piston,
The third piston and the check valve are provided inside the second piston,
The hydraulic clutch operating device according to claim 5.

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