Clutch booster and clutch system

Abstract

The present application relates to clutch system technical field, provide a kind of clutch booster and clutch system, including shell, top rod and the oil cavity, drive gas cavity and high-pressure gas cavity being arranged in shell;Wherein, hydraulic piston is provided in oil cavity, the outer circumferential surface of hydraulic piston is equipped with first return spring;Drive piston and second return spring are provided in drive gas cavity, drive piston is used to drive top rod to move;High-pressure gas cavity is sequentially equipped with valve seat, valve spring and valve, and valve is annular, and the outer circumferential surface of valve is equipped with first limit ring and air hole, and the end of valve seat is opened and inner circumferential surface is equipped with second limit ring;Hydraulic piston is equipped with exhaust cavity, the side wall of exhaust cavity is equipped with exhaust hole communicated with outside, exhaust spring is equipped in exhaust cavity, and the end of exhaust spring is equipped with valve piece.The above-mentioned clutch booster adopts single oil cavity, and the exhaust of drive gas cavity is realized by the setting of mechanical structure.Compared with the design of traditional double oil cavity, oil leakage of oil cavity can be avoided, and failure rate is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the clutch system technical field, especially to a kind of clutch booster and clutch system. BACKGROUND

[0002] Clutch booster is one of important components of hydraulic control clutch vehicle, when the separation or combination of clutch, clutch booster can help to increase output force, to facilitate the operation of clutch.

[0003] At present, commercial vehicle and heavy truck usually adopt hydraulic control gas booster clutch booster, in the process of shifting and starting, clutch booster assists to complete the separation and combination of clutch. At present, hydraulic control gas booster clutch booster usually includes two oil cylinders, main oil cylinder and control oil cylinder respectively;But the structural design of such clutch booster has deficiencies, in working state, oil in oil cylinder is in high pressure state, in the case of improper use of high pressure sealing element, oil and lubricating grease, it is easy to cause oil leakage of oil cylinder, greatly increase the failure rate of clutch booster, affect the normal work of clutch.

[0004] Therefore, how to improve clutch booster, avoid oil leakage of oil cylinder, reduce failure rate, is the difficult problem to be solved in the field at present. SUMMARY

[0005] The present application provides a kind of clutch booster, can avoid oil leakage of oil cylinder, reduce failure rate, solve the difficult problem in the field at present.The present application also provides a kind of clutch system, including the clutch booster described above, therefore, can avoid oil leakage of oil cylinder, reduce failure rate, solve the difficult problem in the field at present.

[0006] The first aspect of the present application provides a kind of clutch booster, including shell, top rod and oil cavity, drive gas cavity and high pressure gas cavity arranged in the shell;Hydraulic piston is provided in the oil cavity, the outer circumferential surface of the hydraulic piston is provided with first return spring;Drive piston and second return spring are provided in the drive gas cavity, the drive piston is used to drive the top rod moves;

[0007] Valve seat, valve spring and valve are sequentially provided in the high pressure gas cavity, the valve is annular, the outer circumferential surface of the valve is provided with first limit ring and air hole, the end of the valve seat is opened and the inner circumferential surface is provided with second limit ring;

[0008] Exhaust cavity is provided in the hydraulic piston, the side wall of the exhaust cavity is provided with exhaust hole communicated with the outside, exhaust spring is provided in the exhaust cavity, the end of the exhaust spring is provided with valve piece;

[0009] Under the action of the valve spring, the first limit ring is abutted with the second limit ring, can isolate the high pressure gas cavity and the drive gas cavity;

[0010] Under the action of oil pressure, the hydraulic piston drives the valve plate to move, and the valve plate blocks the end of the valve under the action of the exhaust spring; the end of the hydraulic piston pushes the first limiting ring to separate the valve from the valve seat, so as to connect the high-pressure gas cavity and the driving gas cavity;

[0011] When the oil pressure is withdrawn, the hydraulic piston is reset, the valve abuts against the valve seat, the valve plate is separated from the valve, and the gas in the driving gas cavity enters the exhaust cavity through the air hole.

[0012] According to the clutch booster provided by the application, the high-pressure gas cavity is further provided with a valve sleeve.

[0013] The valve sleeve is arranged in the valve seat and sleeved on the outer circumferential surface of the valve.

[0014] The outer circumferential surface of the valve sleeve is provided with a third limiting ring, and the valve spring is sleeved between the first limiting ring and the third limiting ring.

[0015] According to the clutch booster provided by the application, the two ends of the second reset spring abut against the driving piston and the inner wall of the driving gas cavity, respectively.

[0016] According to the clutch booster provided by the application, the driving piston is provided with a mounting seat, and the top rod is arranged on the mounting seat.

[0017] According to the clutch booster provided by the application, the opening of the driving gas cavity is provided with an end cover, and the top rod penetrates through the end cover.

[0018] The outer circumferential surface of the top rod is sleeved with an elastic dust cover, one end of the dust cover is connected with the top rod, and the other end is connected with the end cover.

[0019] According to the clutch booster provided by the application, the inner wall of the exhaust cavity is provided with a spring seat, and the valve spring is arranged on the spring seat.

[0020] According to the clutch booster provided by the application, the housing is provided with an air inlet connector, and the high-pressure gas cavity is located in the air inlet connector.

[0021] The air inlet connector, the valve seat and the housing are connected in sequence.

[0022] According to the clutch booster provided by the application, a first sealing ring is arranged between the outer circumferential surface of the hydraulic piston and the inner wall of the oil cavity.

[0023] According to the clutch booster provided by the application, a second sealing ring is arranged between the outer circumferential surface of the driving piston and the inner wall of the driving gas cavity.

[0024] A second aspect of the application provides a clutching system comprising a clutching booster as claimed in any one of the preceding claims.

[0025] The clutch booster provided by the application comprises a shell, a top rod, an oil cavity, a driving gas cavity and a high-pressure gas cavity arranged in the shell; wherein the oil cavity is provided with a hydraulic piston, and the outer circumferential surface of the hydraulic piston is sleeved with a first reset spring; the driving gas cavity is provided with a driving piston and a second reset spring, and the driving piston is used to drive the top rod to move; further, the high-pressure gas cavity is sequentially sleeved with a valve seat, a valve spring and a valve, the valve is annular, the outer circumferential surface of the valve is provided with a first limiting ring and a vent hole, and the end of the valve seat is opened and the inner circumferential surface of the valve seat is provided with a second limiting ring; the hydraulic piston is provided with an exhaust cavity, the side wall of the exhaust cavity is provided with an exhaust hole communicated with the outside, the exhaust cavity is provided with an exhaust spring, and the end of the exhaust spring is provided with a valve piece; during operation, under the action of the valve spring, the first limiting ring abuts against the second limiting ring, so as to isolate the high-pressure gas cavity from the driving gas cavity; under the action of oil pressure, the hydraulic piston drives the valve piece to move, and the valve piece forms a seal on the end of the valve under the action of the exhaust spring; the end of the hydraulic piston pushes the first limiting ring to separate the valve from the valve seat, so as to connect the high-pressure gas cavity with the driving gas cavity; when the oil pressure is withdrawn, the hydraulic piston is reset, the valve abuts against the valve seat, the valve piece is separated from the valve, and the gas in the driving gas cavity enters the exhaust cavity through the vent hole. The clutch booster comprises the oil cavity, the driving gas cavity and the high-pressure gas cavity, adopts a single oil cavity, and realizes the exhaust of the driving gas cavity through the arrangement of a mechanical structure. During use, when the clutch pedal is stepped on, high-pressure oil enters the oil cavity, the hydraulic piston moves along the inner wall of the oil cavity under the action of oil pressure, and drives the valve piece to move, and the valve piece forms a seal on the end of the valve under the action of the exhaust spring; then, the end of the hydraulic piston pushes the first limiting ring to move and separates the valve from the valve seat; at this time, the high-pressure gas cavity is connected with the driving gas cavity, the gas in the high-pressure gas cavity enters the driving gas cavity, and drives the driving piston to move, so as to make the top rod extend. When the clutch pedal is partially released, the hydraulic piston is partially reset under the action of the first reset spring, the valve abuts against the valve seat again, the valve piece is separated from the valve when the pressure in the driving gas cavity is greater than the pressure of the exhaust spring, the gas in the driving gas cavity enters the exhaust cavity through the vent hole and is discharged through the exhaust hole, until the pressure in the driving gas cavity is less than the pressure of the exhaust spring, the valve piece forms a seal on the valve again, and the top rod is partially retracted under the drive of the driving piston, that is, in a half-clutch state. When the clutch pedal is completely released, the hydraulic piston is completely reset under the action of the first reset spring and drives the valve piece to separate from the valve, at this time, the gas in the driving gas cavity continues to enter the exhaust cavity through the vent hole and is completely discharged through the exhaust hole, and the top rod is completely retracted under the drive of the driving piston. The clutch booster adopts a single oil cavity, realizes the exhaust of the gas in the driving gas cavity through the design of a mechanical structure, compared with the traditional design of double oil cavities, can avoid oil leakage of the oil cylinder and reduce the failure rate of the clutch booster. Therefore, the clutch booster provided by the application can avoid oil leakage of the oil cylinder, reduce the failure rate and solve the problems in the field at present. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0027] Figure 1 is a sectional view of the clutch booster in the specific embodiment of the present application;

[0028] Figure 2 is an enlarged view of the local part A in the specific embodiment of the present application; Figure 1

[0029] Figure 3 is a schematic view of the internal structure of the oil cavity and the high-pressure gas cavity in the specific embodiment of the present application;

[0030] Figure 4 is an exploded view of the internal structure of the oil cavity and the high-pressure gas cavity in the specific embodiment of the present application;

[0031] Figure 5 is a sectional view of the assembly of the valve seat, the valve, the valve plate and the hydraulic piston in the specific embodiment of the present application.

[0032] Reference signs:

[0033] 1, housing; 2, ejector rod; 3, oil cavity; 4, driving gas cavity; 5, high-pressure gas cavity; 6, hydraulic piston; 7, first return spring; 8, driving piston; 9, second return spring; 10, valve seat; 11, valve spring; 12, valve; 13, first limiting ring; 14, air vent hole; 15, second limiting ring; 16, exhaust cavity; 17, exhaust hole; 18, exhaust spring; 19, valve plate; 20, valve sleeve; 21, third limiting ring; 22, mounting seat; 23, end cover; 24, spring seat; 25, air inlet joint; 26, first sealing ring; 27, second sealing ring; 28, first Y-shaped sealing ring; 29, second Y-shaped sealing ring; 30, dust cover; 31, bolt. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0035] ​In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0039] The following will be described in conjunction with Figures 1 to 5The clutch booster and the clutch system in the embodiment are described; it should be understood that the following is only a schematic embodiment of the present application and does not constitute any particular limitation on the present application.

[0040] The clutch booster provided by the embodiment mainly comprises a shell 1, a top rod 2, an oil cavity 3, a driving gas cavity 4 and a high-pressure gas cavity 5 arranged in the shell 1.

[0041] It should be noted that, Figure 1 The two arrows in the figure respectively indicate the direction of the high-pressure gas cavity air inlet and the direction of the oil cavity oil inlet.

[0042] The oil cavity 3 is provided with a hydraulic piston 6, and the outer periphery of the hydraulic piston 6 is sleeved with a first reset spring 7, please refer to Figure 1 and Figure 2 .

[0043] The driving gas cavity 4 is provided with a driving piston 8 and a second reset spring 9, and the driving piston 8 is used to drive the top rod 2 to move.

[0044] The high-pressure gas cavity 5 can be sequentially sleeved with a valve seat 10, a valve spring 11 and a valve 12, please refer to Figure 2 , wherein the valve 12 is annular, the outer periphery of the valve 12 is provided with a first limiting ring 13 and an air hole 14, the end of the valve seat 10 is open, and the inner periphery of the valve seat 10 is provided with a second limiting ring 15.

[0045] Further, the hydraulic piston 6 is provided with an exhaust cavity 16, the side wall of the exhaust cavity 16 is provided with an exhaust hole 17 communicating with the outside, please refer to Figure 1 and Figure 2 , the exhaust cavity 16 is provided with an exhaust spring 18, and the end of the exhaust spring 18 is provided with a valve piece 19, that is, one end of the exhaust spring 18 is connected with the inner wall of the exhaust cavity 16, and the other end is connected with the valve piece 19.

[0046] Under the action of the valve spring 11, the first limiting ring 13 of the valve 12 abuts against the second limiting ring 15 of the valve seat 10, which can isolate the high-pressure gas cavity 5 from the driving gas cavity 4; under the action of oil pressure, the hydraulic piston 6 drives the valve piece 19 to move, and the valve piece 19 forms a blockage on the end of the valve 12 under the action of the exhaust spring 18; the end of the hydraulic piston 6 pushes the first limiting ring 13 to make the valve 12 separate from the valve seat 10, so as to communicate the high-pressure gas cavity 5 with the driving gas cavity 4; when the oil pressure is withdrawn, the hydraulic piston 6 resets, the valve 12 abuts against the valve seat 10, the valve piece 19 separates from the valve 12, and the gas in the driving gas cavity 4 enters the exhaust cavity 16 through the air hole 14.

[0047] The above clutch booster comprises the oil cavity 3, the driving gas cavity 4 and the high-pressure gas cavity 5, adopts a single oil cavity 3, and realizes the exhaust of the driving gas cavity 4 through the setting of the mechanical structure.

[0048] The three working processes of the clutch booster are described in detail below, namely, the clutch pedal is stepped on, the clutch pedal is partially released, and the clutch pedal is completely released.

[0049] When the clutch pedal is stepped on, high-pressure oil enters the oil chamber 3, and under the action of oil pressure, the hydraulic piston 6 moves along the inner wall of the oil chamber 3 and drives the valve plate 19 in the exhaust chamber 16 to gradually approach the valve 12; until the valve plate 19 blocks the end of the valve 12 under the action of the exhaust spring 18; then, the end of the hydraulic piston 6 abuts against the first limiting ring 13 of the valve 12 and pushes the valve 12 to move away from the valve seat 10; at this time, the high-pressure gas chamber 5 is in communication with the drive gas chamber 4, and the high-pressure gas in the high-pressure gas chamber 5 enters the drive gas chamber 4 and drives the drive piston 8 to move, thereby extending the top rod 2. Please see Figure 1 .

[0050] When the clutch pedal is partially released, the hydraulic piston 6 is partially reset under the action of the first reset spring 7, at this time, the valve 12 abuts against the valve seat 10 again; when the pressure in the drive gas chamber 4 is greater than the pressure of the exhaust spring 18, the valve plate 19 is separated from the valve 12 under the action of the high-pressure gas in the drive gas chamber 4, the gas in the drive gas chamber 4 enters the exhaust chamber 16 through the air hole 14 on the valve 12 and is discharged through the exhaust hole 17 on the exhaust chamber 16, until the pressure in the drive gas chamber 4 is less than or equal to the pressure of the exhaust spring 18, at this time, the valve plate 19 blocks the valve 12 again, and the top rod 2 is partially retracted under the drive of the drive piston 8, that is, in a half-clutch state.

[0051] When the clutch pedal is completely released, the hydraulic piston 6 is completely reset under the action of the first reset spring 7 and drives the valve plate 19 to separate from the valve 12, at this time, the gas in the drive gas chamber 4 continues to enter the exhaust chamber 16 through the air hole 14 on the valve 12 and is completely discharged through the exhaust hole 17, and the top rod 2 is completely retracted under the drive of the drive piston 8, that is, the top rod 2 is retracted to the initial state.

[0052] The clutch booster described above adopts a single oil chamber 3 and uses the design of mechanical structure to realize the discharge of the gas in the drive gas chamber 4, compared with the traditional design of double oil chambers 3, can avoid oil leakage of the oil chamber 3 and reduce the failure rate of the clutch booster. Therefore, the clutch booster provided by the present application can avoid oil leakage of the oil cylinder, reduce the failure rate, and solve the problems in the field at this stage.

[0053] The clutch booster provided by the present embodiment can further be provided with a valve sleeve 20 in the high-pressure gas chamber 5; please see Figure 5The valve sleeve 20 is arranged in the valve seat 10 and sleeved on the outer circumferential surface of the valve 12; the outer circumferential surface of the valve sleeve 20 is further provided with a third limiting ring 21, and the valve spring 11 is sleeved between the first limiting ring 13 and the third limiting ring 21; under the pushing of the hydraulic piston 6, the valve 12 can move along the inner wall of the valve sleeve 20, and under the reset of the hydraulic piston 6, the valve 12 can be reset under the action of the valve spring 11, so that the valve 12 abuts against the valve seat 10.

[0054] The clutch booster provided in the embodiment can be used to make the two ends of the second reset spring 9 abut against the driving piston 8 and the inner wall of the driving air cavity 4 respectively. Figure 1 The second reset spring 9 is arranged between the driving piston 8 and the inner wall of the driving air cavity 4, and when the clutch booster is assembled, the top rod 2 needs to be pressed and the second reset spring 9 needs to have a certain pressure, that is, in the initial state, the driving piston 8 is located at the middle position of the driving air cavity 4; in actual work, the driving piston 8 moves between the middle position and the right end of the driving air cavity 4; please refer to Figure 1 , Figure 1 The position of the driving piston 8 is the right end of the driving air cavity 4.

[0055] The clutch booster provided in the embodiment can be used to make the two ends of the second reset spring 9 abut against the driving piston 8 and the inner wall of the driving air cavity 4 respectively. Figure 1

[0056] Further, the opening of the driving air cavity 4 of the clutch booster is provided with an end cover 23, and the top rod 2 passes through the end cover 23; in order to avoid dust entering the driving air cavity 4 through the top rod 2, a flexible dust cover 30 can be sleeved on the outer circumferential surface of the top rod 2; please refer to Figure 1 In actual setting, one end of the dust cover 30 is connected with the protruding part of the top rod 2, and the other end is connected with the end cover 23, so as to avoid dust from entering while ensuring the normal extension and retraction of the top rod 2.

[0057] The clutch booster provided in the embodiment can be used to make the two ends of the second reset spring 9 abut against the driving piston 8 and the inner wall of the driving air cavity 4 respectively.

[0058] The clutch booster provided in the embodiment can be used to make the two ends of the second reset spring 9 abut against the driving piston 8 and the inner wall of the driving air cavity 4 respectively.The shell 1 can be provided with an air inlet joint 25, and the high-pressure gas cavity 5 is located in the air inlet joint 25; the air inlet joint 25, the valve seat 10 and the shell 1 can be sequentially connected by bolts 31. In actual work, high-pressure gas enters the high-pressure gas cavity 5 through the air inlet joint 25, so as to drive the top rod 2 to complete the extension action.

[0059] The clutch booster provided by the embodiment can be provided with a first sealing ring 26 between the outer circumferential surface of the hydraulic piston 6 and the inner wall of the oil cavity 3, please refer to Figure 5 ; further, the outer circumferential surface of the hydraulic piston 6 can be further provided with a first Y-shaped sealing ring 28, so as to better realize sealing and avoid oil leakage of the oil cavity 3.

[0060] The clutch booster provided by the embodiment can be provided with a second sealing ring 27 between the outer circumferential surface of the driving piston 8 and the inner wall of the driving gas cavity 4; please refer to Figure 1 , further, the outer circumferential surface of the driving piston 8 can be further provided with a second Y-shaped sealing ring 29, so as to better realize sealing and avoid gas leakage of the driving gas cavity 4.

[0061] The embodiment further provides a clutch system comprising the clutch booster, and the clutch system is also within the protection scope of the present application.

[0062] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A clutch booster, characterized in that, It includes a housing (1), a push rod (2), and an oil chamber (3), a driving air chamber (4), and a high-pressure air chamber (5) disposed within the housing (1); a hydraulic piston (6) is provided in the oil chamber (3), and a first return spring (7) is sleeved on the outer circumference of the hydraulic piston (6); a driving piston (8) and a second return spring (9) are provided in the driving air chamber (4), and the driving piston (8) is used to drive the push rod (2) to move; The high-pressure air chamber (5) is sequentially fitted with a valve seat (10), a valve spring (11) and a valve (12). The valve (12) is annular. The outer circumferential surface of the valve (12) is provided with a first limiting ring (13) and a vent hole (14). The valve seat (10) is open at the end and has a second limiting ring (15) on its inner circumferential surface. The hydraulic piston (6) is provided with an exhaust chamber (16), the side wall of the exhaust chamber (16) is provided with an exhaust hole (17) communicating with the outside, the exhaust chamber (16) is provided with an exhaust spring (18), and the end of the exhaust spring (18) is provided with a valve plate (19). Under the action of the valve spring (11), the first limiting ring (13) abuts against the second limiting ring (15), which can isolate the high-pressure air chamber (5) from the driving air chamber (4); Under the action of oil pressure, the hydraulic piston (6) drives the valve plate (19) to move. Under the action of the exhaust spring (18), the valve plate (19) forms a blockage on the end of the valve (12). The end of the hydraulic piston (6) pushes the first limiting ring (13) to disengage the valve (12) from the valve seat (10) so as to connect the high-pressure air chamber (5) and the driving air chamber (4). When the oil pressure is withdrawn, the hydraulic piston (6) resets, the valve (12) abuts against the valve seat (10), the valve plate (19) disengages from the valve (12), and the gas in the drive air chamber (4) enters the exhaust chamber (16) through the vent (14).

2. The clutch booster according to claim 1, characterized in that, The high-pressure air chamber (5) is also equipped with a valve sleeve (20); The valve sleeve (20) is disposed inside the valve seat (10) and sleeved on the outer circumferential surface of the valve (12); The outer circumferential surface of the valve sleeve (20) is provided with a third limiting ring (21), and the valve spring (11) is sleeved between the first limiting ring (13) and the third limiting ring (21).

3. The clutch booster according to claim 1, characterized in that, The two ends of the second reset spring (9) abut against the inner walls of the drive piston (8) and the drive air chamber (4), respectively.

4. The clutch booster according to claim 1, characterized in that, The drive piston (8) is provided with a mounting seat (22), and the push rod (2) is disposed on the mounting seat (22).

5. The clutch booster according to claim 1, characterized in that, The opening of the driving air chamber (4) is provided with an end cap (23), and the push rod (2) passes through the end cap (23); The outer periphery of the top rod (2) is fitted with an elastic dust cover (30), one end of which is connected to the top rod (2) and the other end is connected to the end cap (23).

6. The clutch booster according to claim 1, characterized in that, The inner wall of the exhaust chamber (16) is provided with a spring seat (24), and the valve spring (11) is disposed on the spring seat (24).

7. The clutch booster according to claim 1, characterized in that, The housing (1) is provided with an air inlet connector (25), and the high-pressure air chamber (5) is located inside the air inlet connector (25); The air inlet connector (25), the valve seat (10), and the housing (1) are connected in sequence.

8. The clutch booster according to any one of claims 1-7, characterized in that, A first sealing ring (26) is provided between the outer peripheral surface of the hydraulic piston (6) and the inner wall of the oil chamber (3).

9. The clutch booster according to any one of claims 1-7, characterized in that, A second sealing ring (27) is provided between the outer peripheral surface of the driving piston (8) and the inner wall of the driving air chamber (4).

10. A clutch system, characterized in that, Includes the clutch booster as described in any one of claims 1-9.

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