Pull-type separation device of clutch

Abstract

The invention discloses a pull-type separation device of a clutch, relates to the technical field of clutches, and solves the problems that according to an existing clutch separation device, after a clutch friction plate is abraded, the free stroke of a pedal needs to be manually adjusted, the workload of a driver is increased, and if adjustment is not timely, the clutch is extremely likely to be seriously ablated. A guide shaft tube and a connecting flange are arranged on the separation seat, the separation cylinder is mounted on the connecting flange, the separation piston is slidably mounted on the guide shaft tube and located in the separation cylinder, the separation seat, the separation cylinder and the separation piston form an air cylinder mechanism, at least one rotation stopping cavity is formed in the separation piston, and at least one hydraulic oil cylinder is arranged on the separation cylinder. Each hydraulic oil cylinder is installed in the corresponding rotation stopping cavity in a sliding mode. According to the separation device of the clutch, in the separation control process of the clutch, a separation shifting fork, a shifting fork sleeve, a separation lever and a push rod do not need to be arranged, and the working stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of clutches, and particularly to a pull-type separation device for a clutch. Background Art

[0002] At present, automobile clutch control devices include two forms: mechanical operation and hydraulic air-assisted operation. The above two forms of clutch control devices both include a release fork, a fork sleeve and a bearing seat, and both have the problems of complex structure, unstable operation, and the need for manual adjustment of the pedal free travel after the clutch friction plate wears. If the adjustment is not timely, it will cause serious ablation of the clutch. Moreover, no matter which of the above separation devices, they are inseparable from the release fork, the release bearing seat, the push rod and the adjustment pull rod. Due to the large elastic force of the compression spring of the automobile clutch, the release fork, fork sleeve, bearing seat, push rod and adjustment pull rod of the clutch are extremely easy to wear, resulting in faults such as incomplete separation and unstable engagement of the clutch.

[0003] In summary, the existing clutch separation device requires manual adjustment of the pedal free travel after the clutch friction plate wears, which increases the workload of the driver. If the adjustment is not timely, it is also extremely easy to cause serious ablation of the clutch. Summary of the Invention

[0004] Aiming at the problem that the existing clutch separation device requires manual adjustment of the pedal free travel after the clutch friction plate wears, which increases the workload of the driver and is extremely easy to cause serious ablation of the clutch if the adjustment is not timely, the purpose of the present invention is to provide a pull-type separation device for a clutch.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A pull-type separation device for a clutch, including: a separation seat 1, a separation cylinder 2 and a separation piston 4. A guide shaft tube 22 and a connection flange 23 are provided on the separation seat 1. The separation seat 1, the separation cylinder 2 and the separation piston 4 are coaxially arranged. The separation cylinder 2 is installed on the connection flange 23. The separation piston 4 is slidably installed on the guide shaft tube 22 and is located inside the separation cylinder 2. A sliding hole is provided at the front end of the separation cylinder 2. The front end of the separation piston 4 extends out through the sliding hole. An air chamber 20 is formed by enclosing the separation piston 4 and the separation cylinder 2;

[0007] At least one anti-rotation cavity 16 is provided on the separation piston 4, and at least one hydraulic cylinder 21 is provided on the separation cylinder 2. Each hydraulic cylinder 21 is slidably installed in an anti-rotation cavity 16;

[0008] It further includes: a hydraulic piston 3. Each hydraulic piston 3 is slidably installed in a hydraulic cylinder 21. The rear end of the hydraulic piston 3 abuts against the bottom of the anti-rotation cavity 16. An oil chamber 19 is formed by enclosing the front end of the hydraulic piston 3 and the hydraulic cylinder 21;

[0009] An air passage 5 and an oil passage 6 are provided on the separating cylinder 2. The outlet of the air passage 5 communicates with the air cavity 20, and each outlet of the oil passage 6 communicates with an oil cavity 19.

[0010] It further includes a piston return spring 18. The piston return spring 18 is sleeved on the guide shaft tube 22. One end of the piston return spring 18 abuts against the connecting flange 23, and the other end of the piston return spring 18 abuts against the separating piston 4.

[0011] For the above pull-type separating device of the clutch, it further includes an oil seal 12. An oil seal 12 is installed at the front end of each hydraulic piston 3, and the hydraulic piston 3 and the inner wall of the hydraulic cylinder 21 are sealed by the oil seal 12.

[0012] For the above pull-type separating device of the clutch, it further includes a first air seal 11 and a second wear-resistant ring 10. The first air seal 11 and the second wear-resistant ring 10 are installed on the outer periphery of the rear end of the separating piston 4. The first air seal 11 is arranged on the front side of the second wear-resistant ring 10, and the outer wall of the rear end of the separating piston 4 and the inner wall of the separating cylinder 2 are sealed by the first air seal 11.

[0013] For the above pull-type separating device of the clutch, it further includes a second air seal 13. The second air seal 13 is installed on the inner periphery of the sliding hole of the separating cylinder 2, and the outer wall of the front end of the separating piston 4 and the sliding hole of the separating cylinder 2 are sealed by the second air seal 13.

[0014] For the above pull-type separating device of the clutch, it further includes a release bearing 8 and a first snap ring 14. The release bearing 8 is installed on the outer wall of the front end of the separating piston 4 and is limited by the first snap ring 14.

[0015] For the above pull-type separating device of the clutch, it further includes a first wear-resistant ring 9 and a second snap ring 15. The first wear-resistant ring 9 is installed on the inner wall of the front end of the separating piston 4 and is limited by the second snap ring 15.

[0016] For the above pull-type separating device of the clutch, it further includes a dust cover 7. The dust cover 7 surrounds the front end of the separating piston 4 and is located between the release bearing 8 and the separating cylinder 2. The front end of the dust cover 7 is connected to the outer wall of the front end of the separating piston 4, and the rear end of the dust cover 7 is connected to the separating cylinder 2.

[0017] For the above pull-type separating device of the clutch, at least one air hole 17 for communicating the inside and the outside is provided on the separating cylinder 2. The air hole 17 is located between the connecting flange 23 and the separating piston 4 and is arranged close to the connecting flange 23.

[0018] The pull-type separation device of the clutch described above, wherein the axis of each hydraulic piston 3 is parallel to the axis of the separation seat 1, and a plurality of hydraulic pistons 3 are arranged at equal intervals around the circumference of the axis of the separation seat 1.

[0019] The pull-type separation device of the clutch described above, wherein the inlet of the air circuit 5 is communicated with the external air circuit, and the inlet of the oil circuit 6 is communicated with the external oil circuit.

[0020] Due to the adoption of the above technology, the positive effects of the present invention compared with the prior art are as follows:

[0021] (1) The separation piston of the present invention can slide horizontally and freely along the guide shaft tube. After the clutch friction plate wears, there is no need to manually adjust the free travel of the pedal, reducing the wear caused by the lack of free travel of the clutch, greatly extending the service life of the clutch friction plate, improving driving safety, and reducing the vehicle operation cost;

[0022] (2) There is no direct contact between the separation piston and the guide shaft tube of the present invention. The separation piston is sleeved on the guide shaft tube through a wear-resistant ring, and the outer wall of the guide shaft tube is not worn. At the same time, a rotation prevention cavity is machined on the separation piston, and the separation piston and the guide shaft tube are positioned in the rotation prevention cavity through a hydraulic cylinder, ensuring that the separation piston only slides along the length direction of the guide shaft tube, greatly extending the service life of the air seal and the oil seal;

[0023] (3) An oil cavity is formed between the hydraulic piston and the hydraulic cylinder of the present invention. The magnitude of the oil pressure in the oil cavity allows the driver to perceive the magnitude of the resistance during the clutch separation process through the reaction force of the oil pressure in the clutch master cylinder, and the driver can thereby judge the engagement state of the clutch;

[0024] (4) When the separation device of the clutch of the present invention controls the separation of the clutch, there is no need to set a separation fork, a fork sleeve, a release lever, and a push rod, thereby reducing the easily worn components, improving the working stability, and the present invention has the advantages of simple structure and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a pull-type separation device of a clutch of the present invention.

[0026] Figure 2 is Figure 1 a partial enlarged view of the position where the air circuit and the oil circuit are opened on the separation cylinder in

[0027] Figure 3 is Figure 1 a partial enlarged view of the assembly position of the hydraulic piston in

[0028] Figure 4 is Figure 1Partial enlarged view of the assembly position of the first wear-resistant ring.

[0029] Figure 5 It is a schematic structural diagram of a control device.

[0030] In the drawings: 1, separating seat; 2, separating cylinder; 3, hydraulic piston; 4, separating piston; 5, gas circuit; 6, oil circuit; 7, dust cover; 8, separating bearing; 9, first wear-resistant ring; 10, second wear-resistant ring; 11, first air seal; 12, oil seal; 13, second air seal; 14, first snap ring; 15, second snap ring; 16, anti-rotation cavity; 17, air hole; 18, piston return spring; 19, oil cavity; 20, gas cavity; 21, hydraulic cylinder; 22, guide shaft tube; 23, connecting flange; 100, end cover; 101, first return spring; 102, intake valve; 103, first air passage; 104, intake valve cavity; 105, annular intake valve seat; 106, second return spring; 107, exhaust passage; 108, relay valve piston; 109, first sealing ring; 110, second air passage; 111, third oil seal; 112, oil passage; 113, relay valve piston cavity. Detailed implementation manners

[0031] The present invention will be further described below with reference to the drawings and specific embodiments, but it is not intended to limit the present invention.

[0032] Please refer to Figures 1 to 5 As shown, a pull-type separating device for a clutch is shown. Among them, a guide shaft tube 22 and a connecting flange 23 are provided on a separating seat 1. The separating cylinder 2 is installed on the connecting flange 23 by means of flange connection, and other connection methods such as threaded connection can also be used. The separating piston 4 is slidably installed on the guide shaft tube 22 and is located inside the separating cylinder 2. As Figure 1 shown, the separating seat 1, the separating cylinder 2 and the separating piston 4 form a cylinder mechanism. The separating piston 4 and the separating cylinder 2 enclose to form a gas cavity 20. By adjusting the pressure in the gas cavity 20, the reciprocating movement of the separating piston 4 in the separating cylinder 2 can be realized. When the pressure in the gas cavity 20 increases, the separating piston 4 moves backward.

[0033] Further, in a preferred embodiment, a first air seal 11 is installed on the outer periphery of the rear end of the separating piston 4. The outer wall of the rear end of the separating piston 4 and the inner wall of the separating cylinder 2 are sealed by the first air seal 11 to ensure the stable operation of the piston cylinder mechanism.

[0034] Further, in a preferred embodiment, a second wear-resistant ring 10 is installed on the outer periphery of the rear end of the separating piston 4 to protect the separating piston 4 and the separating cylinder 2 and reduce the wear between the two during the operation of the piston cylinder mechanism.

[0035] Further, in a preferred embodiment, an air hole 17 communicating with the inside and outside is formed in the separation cylinder 2. When the distance between the separation piston 4 and the connecting flange 23 changes, the air hole 17 can adjust the pressure change between the separation piston 4 and the connecting flange 23 by discharging or inhaling air.

[0036] Further, in a preferred embodiment, at least one anti-rotation cavity 16 is provided on the separation piston 4, and at least one hydraulic cylinder 21 is provided on the separation cylinder 2. Each hydraulic cylinder 21 is slidably installed in an anti-rotation cavity 16; the hydraulic cylinder 21 and the hydraulic piston 3 enclose an oil cylinder mechanism, and an oil cavity 19 is formed by enclosing the front end of the hydraulic piston 3 and the hydraulic cylinder 21. The reciprocating movement of the hydraulic piston 3 in the hydraulic cylinder 21 can be realized by adjusting the pressure in the oil cavity 19. The rear end of the hydraulic piston 3 abuts against the bottom of the anti-rotation cavity 16. When the pressure in the oil cavity 19 increases, the hydraulic piston 3 pushes the separation piston 4 to displace backward.

[0037] Further, in a preferred embodiment, a plurality of anti-rotation cavities 16 are provided on the separation piston 4, and each hydraulic cylinder 21 is located in an anti-rotation cavity 16. The rotation of the separation piston 4 around the guide shaft tube 22 during displacement is restricted by the plurality of hydraulic cylinders 21, playing an anti-rotation role and effectively reducing the wear on the separation piston 4.

[0038] Further, in a preferred embodiment, the piston return spring 18 is sleeved on the guide shaft tube 22. One end of the piston return spring 18 abuts against the connecting flange 23, and the other end of the piston return spring 18 abuts against the separation piston 4. When the pressure in the air cavity 20 and the pressure in the oil cavity 19 decrease, the separation piston 4 is pushed by the piston return spring 18 to displace forward until it is reset.

[0039] Further, in a preferred embodiment, an air path 5 and an oil path 6 are formed in the separation cylinder 2. The outlet of the air path 5 is communicated with the air cavity 20, and each outlet of the oil path 6 is communicated with an oil cavity 19; the inlet of the air path 5 is communicated with an external air path, and the inlet of the oil path 6 is communicated with an external oil path. The control device is as Figure 5 shown, the oil path 6 at the front end of the separation cylinder 2 is of an annular structure and is arranged around the guide shaft tube 22, so that the oil cavities 19 in the plurality of circumferentially arranged hydraulic cylinders 21 are communicated with the oil path 6;

[0040] When the separation device of the present invention is applied to a vehicle, before the clutch pedal is stepped on, the external oil circuit, oil circuit 6, and multiple oil cavities 19 are all filled with clutch oil. When the driver steps on the clutch pedal, the pressure in the external oil circuit changes, and the clutch oil is pressed into the oil cavity 19 through the oil circuit 6 from the external oil circuit, pushing the multiple hydraulic pistons 3 to move backward, and then pushing the separation piston 4 to move backward; at the same time, the gas in the air storage tank enters the external air circuit and enters the air cavity 20 through the air circuit 5, pushing the separation piston 4 to move backward. The release bearing 8 is installed on the separation piston 4 and realizes the clutch function with the displacement of the separation piston 4.

[0041] Further, in a preferred embodiment, after the driver releases the clutch pedal, the pressure in the external oil circuit returns to the state before stepping on, the air circuit connected to the air storage tank is closed, and under the reaction force of the clutch release lever, the release bearing 8 moves forward. At the same time, the release bearing 8 drives the separation piston 4 to move forward. At the same time, under the action of the piston return spring 18, the separation piston 4 returns to its original position and pushes the multiple hydraulic pistons 3 to return to their original positions. The clutch oil in the oil cavity 19 flows back into the external oil circuit, and the gas in the air cavity 20 flows back into the external air circuit and is discharged.

[0042] Further, in a preferred embodiment, the stroke of the clutch pedal is small. When the driver steps on the clutch pedal, the clutch oil cannot directly push the separation piston 4 to displace to the position required for clutch engagement. It is necessary to cooperate with the air storage tank and the external air circuit, and the gas in the air cavity 20 is used to push the separation piston 4 to displace to the position required for clutch engagement. In the separation device of the present invention, the clutch oil plays a role in controlling the opening and closing of the air storage tank and the external air circuit.

[0043] Further, in a preferred embodiment, the dust cover 7 is arranged around the front end of the separation piston 4 and is located between the release bearing 8 and the separation cylinder 2. The front end of the dust cover 7 is connected to the outer wall of the front end of the separation piston 4, and the rear end of the dust cover 7 is connected to the separation cylinder 2. The connection between the separation piston 4 and the separation cylinder 2 is sealed by the dust cover 7. During the reciprocating movement of the separation piston 4, the dust cover 7 prevents dust and other foreign objects from entering the separation cylinder 2 along with the separation piston 4, affecting the operation of the equipment.

[0044] Further, in a preferred embodiment, the separation piston 4 reciprocates forward and backward in the separation cylinder 2. By installing a second wear-resistant ring 10 between the separation piston 4 and the separation cylinder 2, the wear between the separation piston 4 and the separation cylinder 2 can be effectively reduced; by installing a first wear-resistant ring 9 between the separation piston 4 and the guide shaft tube 22, the wear between the separation piston 4 and the guide shaft tube 22 can be effectively reduced.

[0045] Further, in a preferred embodiment, the second air seal 13 is installed on the inner circumference of the sliding hole of the separation cylinder 2, and the outer wall of the front end of the separation piston 4 and the sliding hole of the separation cylinder 2 are sealed by the second air seal 13.

[0046] Further, in a preferred embodiment, the first air seal 11 is provided on the front side of the second wear-resistant ring 10, and the outer wall of the rear end of the separation piston 4 and the inner wall of the separation cylinder 2 are sealed by the first air seal 11.

[0047] Further, in a preferred embodiment, the assembly positions of the first snap ring 14 and the second snap ring 15 are as Figure 4 shown. The first snap ring 14 is used to limit the position of the separation bearing 8 to prevent relative displacement between the separation bearing 8 and the separation piston 4, so as to avoid affecting the operation of the equipment; the second snap ring 15 is used to limit the position of the first wear-resistant ring 9 to prevent relative displacement between the first wear-resistant ring 9 and the separation piston 4, so as to avoid affecting the operation of the equipment.

[0048] Further, in a preferred embodiment, at least one air hole 17 for communicating the inside and the outside is formed in the separation cylinder 2. The air hole 17 is located between the connecting flange 23 and the separation piston 4 and is close to the connecting flange 23, as Figure 1 shown. During the reciprocating movement of the separation piston 4, air is introduced or exhausted through the air hole 17, so that the pressure between the separation piston 4 and the connecting flange 23 will not change greatly, avoiding affecting the operation of the equipment.

[0049] The above are only preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention accordingly.

[0050] The present invention further has the following implementation manners on the above basis:

[0051] In a further embodiment of the present invention, the control device is as Figure 5As shown in the figure, it includes: a housing, an end cover 100, a first return spring 101, an intake valve 102, and a relay valve piston 108. Inside the housing, there is an annular intake valve seat 105 with a reduced inner diameter. The end cover 100 is installed at the left end of the housing. The annular intake valve seat 105 and the end cover 100 enclose an intake valve chamber 104. The intake valve 102 is slidably installed in the intake valve chamber 104. The first return spring 101 is arranged in the intake valve chamber 104. One end of the first return spring 101 abuts against the end cover 100, and the other end of the first return spring 101 abuts against the intake valve 102. The annular intake valve seat 105 is sealed by the intake valve 102. The housing is provided with a first air passage 103 communicating with the intake valve chamber 104. The air storage cylinder fills the intake valve chamber 104 with gas through the first air passage 103; on the right side of the annular intake valve seat 105, there is a relay valve piston chamber 113. The relay valve piston 108 is slidably installed in the relay valve piston chamber 113. An exhaust passage 107 is arranged in the relay valve piston 108. The second return spring 106 is arranged in the relay valve piston chamber 113. One end of the second return spring 106 abuts against the annular intake valve seat 105, and the other end of the second return spring 106 abuts against the relay valve piston 108. The relay valve piston 108 and the inner wall of the relay valve piston chamber 113 are sealed by a first sealing ring 109. The housing is provided with a second air passage 110 and an oil passage 112. The oil passage 112 is located on the right side of the second air passage 110. The second air passage 110 is communicated with the exhaust passage 107. There is a section of the outer wall of the housing between the second air passage 11 and the oil passage 112. The relay valve piston 108 and this section of the outer wall of the housing are sealed by a third oil seal 111. The right end of the relay valve piston 108 abuts against the inner wall of the right end of the housing. The second air passage 11 communicates with the outside. The oil passage 112 communicates with the oil circuit of the clutch pedal. The housing is also provided with an external air circuit and an external oil circuit. The external oil circuit is communicated with the oil passage 112, and the external air circuit is communicated with the relay valve piston chamber 113.

[0052] When the driver steps on the clutch pedal, the pressure in the oil passage 112 increases, pushing the relay valve piston 108 to move leftward. The second return spring 106 is compressed. After the relay valve piston 108 abuts against the intake valve 102, the exhaust passage 107 is closed. Subsequently, the relay valve piston 108 continues to move leftward, pushing the intake valve 102 to move leftward. The first return spring 101 is compressed. The first air passage 103 and the external air circuit are communicated through the annular intake valve seat 105. The gas in the air storage cylinder enters the separation device through the external air circuit;

[0053] When the driver steps on the clutch pedal, the pressure in the oil passage 112 increases, pushing the relay valve piston 108 to move leftward. The second return spring 106 is compressed. The clutch oil in the oil passage 112 directly enters the separation device through the external oil circuit;

[0054] When the driver releases the clutch pedal, the pressure in the oil passage 112 decreases. The second return spring 106 pushes the relay valve piston 108 to move rightward and reset. The first return spring 101 pushes the intake valve 102 to move rightward and reset. The intake valve 102 abuts against the annular intake valve seat 105, disconnecting the first air passage 103 from the external air circuit. Since the pressure in the relay valve piston chamber 113 decreases, the high-pressure gas in the separating device flows back into the relay valve piston chamber 113 through the external air circuit and is discharged to the outside through the exhaust passage 107 and the second air passage 110.

[0055] When the driver releases the clutch pedal, the pressure in the oil passage 112 decreases. The second return spring 106 pushes the relay valve piston 108 to move rightward until the pressure in the oil passage 112 stops changing. At this time, the clutch oil that enters the separating device by stepping on the clutch pedal flows back into the oil passage 112. The right end of the relay valve piston 108 abuts against the inner wall of the right end of the housing, and the oil passage 112 is disconnected from the external oil circuit.

[0056] Working principle:

[0057] When the clutch pedal is depressed, the high-pressure oil from the master cylinder of the clutch operating mechanism enters the oil chamber 19 through the oil passage 112 and applies pressure to the hydraulic piston 3 and the relay valve piston 108. The relay valve piston 108 moves toward the intake valve 102 under the drive of the oil pressure until the relay valve piston 108 contacts the intake valve 102, thereby closing the exhaust passage 107. Then the relay valve piston 108 continues to move leftward, thereby pushing the intake valve 102 to open. The compressed gas in the air storage tank sequentially passes through the first air passage 103 and the external air circuit and enters the air chamber 20. Under the action of the compressed gas in the air chamber 20, the separating piston 4 is pushed to move backward. The backward movement of the separating piston 4 drives the release bearing 8 on the separating piston 4 to move backward, thus realizing the separation process of the clutch.

[0058] When the clutch pedal is released, the oil pressure from the master cylinder of the clutch operating mechanism disappears. Under the action of the second return spring 106, the relay valve piston 108 moves rightward. At the same time, the intake valve 102 also moves rightward under the action of the first return spring 101. When the intake valve 102 contacts the annular intake valve seat 105 on the housing, the gas entering from the first air passage 103 is blocked at this time. The compressed gas that has flowed into the air chamber 20 is discharged sequentially through the external air circuit, the exhaust passage 107, and the second air passage 110. Under the reaction force of the clutch release lever, the release bearing 8 moves forward. At the same time, the release bearing 8 drives the separating piston 4 to move forward until the separating piston 4 returns to its initial position, and the clutch is re-engaged to transmit power.

[0059] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the equivalent substitutions and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A pull-type release device for a clutch, characterized in that: include: A separation seat (1), a separation cylinder (2) and a separation piston (4); the separation seat (1) is provided with a guide shaft tube (22) and a connection flange (23); the separation seat (1), the separation cylinder (2) and the separation piston (4) are coaxially arranged; the separation cylinder (2) is mounted on the connection flange (23); the separation piston (4) is slidably mounted on the guide shaft tube (22) and is located in the separation cylinder (2); a sliding hole is provided at the front end of the separation cylinder (2); the front end of the separation piston (4) extends out from the sliding hole; the separation piston (4) and the separation cylinder (2) are enclosed to form an air cavity (20); The separation piston (4) is provided with at least one anti-rotation chamber (16), the separation cylinder (2) is provided with at least one hydraulic cylinder (21), and each hydraulic cylinder (21) is slidably installed in a anti-rotation chamber (16); It also includes: a hydraulic piston (3), each hydraulic piston (3) is slidably mounted in a hydraulic oil cylinder (21), the rear end of the hydraulic piston (3) abuts against the bottom of the anti-rotation cavity (16), and the front end of the hydraulic piston (3) and the hydraulic oil cylinder (21) together form an oil cavity (19); The separation cylinder (2) is provided with an air circuit (5) and an oil circuit (6), the outlet of the air circuit (5) is communicated with an air cavity (20), and each outlet of the oil circuit (6) is communicated with an oil cavity (19); It also includes: a piston return spring (18), wherein the piston return spring (18) is sleeved on the guide shaft tube (22), one end of the piston return spring (18) abuts against the connecting flange (23), and the other end of the piston return spring (18) abuts against the separation piston (4).

2. The pull-type release device of the clutch according to claim 1, characterized in that: Also includes: Oil seal (12), an oil seal (12) is installed at the front end of each hydraulic piston (3), and the hydraulic piston (3) and the inner wall of the hydraulic cylinder (21) are sealed by the oil seal (12).

3. The pull-type release device of the clutch according to claim 1, characterized in that: Also includes: A first gas seal (11) and a second wear-resistant ring (10) are installed on the outer periphery of the rear end of the separation piston (4), the first gas seal (11) is arranged on the front side of the second wear-resistant ring (10), and the outer wall of the rear end of the separation piston (4) and the inner wall of the separation cylinder (2) are sealed by the first gas seal (11).

4. The pull-type release device of the clutch according to claim 1, characterized in that: Also includes: A second gas seal (13), wherein the second gas seal (13) is installed on the inner periphery of the sliding hole of the separation cylinder (2), and the front end outer wall of the separation piston (4) and the sliding hole of the separation cylinder (2) are sealed by the second gas seal (13).

5. The pull-type release device of the clutch according to claim 1, characterized in that: Also includes: A release bearing (8) and a first retaining spring (14), wherein the release bearing (8) is mounted on the outer wall of the front end of the release piston (4) and is limited by the first retaining spring (14).

6. The pull-type release device of the clutch according to claim 1, characterized in that: Also includes: A first wear-resistant ring (9) and a second retaining spring (15), wherein the first wear-resistant ring (9) is mounted on the inner wall of the front end of the separation piston (4) and is limited by the second retaining spring (15).

7. The pull-type release device of the clutch according to claim 5, characterized in that: Also includes: A dust cover (7), wherein the dust cover (7) is arranged around the front end of the separation piston (4) and is located between the separation bearing (8) and the separation cylinder (2); the front end of the dust cover (7) is connected to the front end outer wall of the separation piston (4), and the rear end of the dust cover (7) is connected to the separation cylinder (2).

8. The pull-type release device of the clutch according to claim 1, characterized in that: The separation cylinder (2) is provided with at least one air hole (17) for connecting the inside and the outside. The air hole (17) is located between the connection flange (23) and the separation piston (4) and is arranged close to the connection flange (23).

9. The pull-type release device of the clutch according to claim 1, characterized in that: The axis of each hydraulic piston (3) is parallel to the axis of the separation seat (1), and a plurality of hydraulic pistons (3) are arranged at equal intervals around the circumference of the axis of the separation seat (1).

10. The pull-type release device of the clutch according to claim 1, characterized in that: The inlet of the gas circuit (5) is connected to an external gas circuit, and the inlet of the oil circuit (6) is connected to an external oil circuit.

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