Automobile clutch slave cylinder

Abstract

The invention relates to the technical field of automobile clutches, and provides an automobile clutch slave cylinder which comprises a cylinder body, a common piston and a standby piston, and the common piston is movably arranged in the cylinder body in the axial direction of the cylinder body; the standby piston is detachably connected to the inner wall of one end of the pump body; the standby piston can move in the axial direction of the pump body. Wherein the standby piston is used for disconnecting the connection with the inner wall of the pump body when the common piston leaks and moving towards the other end of the pump body in the axial direction of the pump body so as to push the common piston to move under the action of hydraulic pressure. According to the automobile clutch slave cylinder, the reliability of the automobile clutch slave cylinder is improved through redundant arrangement of the piston, the maintenance time is bought for sudden failure of a clutch, and the safety of an automobile in the running process is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile clutch, and in particular to an automobile clutch slave cylinder. Background Art

[0002] The automobile clutch is a device that transmits or cuts off the engine power by controlling the contact or separation between the pressure plate and the driven plate. The automobile clutch slave cylinder is a component that realizes the separation and engagement of the clutch through hydraulic transmission.

[0003] The automobile clutch slave cylinder in the related technology, under the condition of frequent use and aging of the seals, the piston of the automobile clutch slave cylinder will leak during driving, resulting in insufficient pressure in the hydraulic system, which will cause the clutch to be unable to disengage and the vehicle to be unable to shift gears normally, affecting the safety of vehicle driving. Summary of the invention

[0004] The embodiment of the present application provides a vehicle clutch sub-cylinder, which can improve the technical problem in the related art that the vehicle clutch sub-cylinder leaks during driving, resulting in the vehicle being unable to shift gears normally.

[0005] In a first aspect, an embodiment of the present application provides a clutch cylinder for an automobile, comprising: Pump body; a common piston, the common piston being movably disposed inside the pump body along the axial direction of the pump body; and A spare piston, the spare piston being detachably connected to the inner wall of one end of the pump body; the spare piston being able to move along the axial direction of the pump body; Wherein, when the common piston leaks, the spare piston is used to disconnect from the inner wall of the pump body and move along the axial direction of the pump body toward the other end of the pump body to push the common piston to move under the action of hydraulic pressure.

[0006] The above technical solutions in the embodiments of the present application have at least the following technical effects: The automobile clutch slave cylinder provided in the embodiment of the present application drives the push rod through the common piston to push the clutch pressure plate to disengage the clutch. When the common piston leaks internally, the spare piston is released to move the spare piston to abut against the common piston, and the hydraulic pressure in the pump body acts on the spare piston to make the spare piston push the common piston to move. With this arrangement, the reliability of the automobile clutch slave cylinder is improved through the redundant setting of the piston, which buys maintenance time for sudden failure of the clutch, improves the safety of the automobile during driving, effectively protects the safety of the driver, and reduces the maintenance time and cost of the automobile.

[0007] In some embodiments, the common piston, the spare piston and the inner wall of the pump body together form a first space; the spare piston and the inner wall of the pump body together form a second space; further comprising: a first oil inlet, the first oil inlet being disposed on the pump body; an output end of the first oil inlet being connected to the first space; and A second oil inlet is provided on the pump body; an output end of the second oil inlet is connected to the second space.

[0008] In some embodiments, it also includes: a reversing valve, the reversing valve having an input end, a first output end and a second output end; the first output end is connected to the input end of the first oil inlet; the second output end is connected to the input end of the second oil inlet; and A main oil pipe, wherein the output end of the main oil pipe is connected to the input end of the reversing valve.

[0009] In some embodiments, a manual adjustment switch is further included, and the manual adjustment switch is arranged on the vehicle operating console; the manual adjustment switch is electrically connected to the reversing valve; and the manual adjustment switch is used to control the reversing valve.

[0010] In some embodiments, a leakage detection device is also included, which is arranged on the common piston; the leakage detection device is electrically connected to the reversing valve; the leakage detection device is used to send a signal to make the reversing valve reverse when the common piston leaks, so that the fluid enters the second space through the second oil inlet to push the spare piston out.

[0011] In some embodiments, it also includes an adsorption device, which is arranged at one end of the pump body; the adsorption device is used to adsorb the spare piston to the inner wall of one end of the pump body.

[0012] In some embodiments, the common piston and the inner wall of the pump body together form a third space; the automobile clutch slave cylinder further includes: An oil discharge port, the oil discharge port being arranged at the other end of the pump body; the oil discharge port being connected to the third space; a one-way valve, the input end of the one-way valve being connected to the output end of the oil discharge port; and An oil drain pipe, one end of which is connected to the output end of the one-way valve; and the other end of which is connected to the input end of the second oil inlet.

[0013] In some embodiments, a displacement sensor is also included, which is arranged on the inner wall of the pump body; the displacement sensor is located in the second space; the displacement sensor is electrically connected to the reversing valve; the displacement sensor is used to detect the displacement distance of the spare piston, and then obtain the fluid volume in the third space.

[0014] In some embodiments, it also includes: A piston rod, the piston rod being arranged at an end of the common piston away from the spare piston; at least a portion of the piston rod protrudes from the pump body; A dust cover, the dust cover is arranged at one end of the pump body; the dust cover is sleeved on the portion of the piston rod protruding from the pump body; and The oil blocking ring is provided at an end of the dust cover away from the pump body; the inner wall of the oil blocking ring slides and rubs against the outer wall of the piston rod.

[0015] In some embodiments, a return spring is also included, one end of which is arranged at the end of the common piston away from the spare piston; the other end of the return spring abuts against the inner wall of the other end of the pump body; the return spring is used to push the common piston to move the common piston toward one end of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of a clutch cylinder for an automobile provided in an embodiment of the present application; Figure 2 A structural schematic diagram of a clutch slave cylinder for an automobile provided in an embodiment of the present application from another perspective; Figure 3 A cross-sectional view of a clutch cylinder for an automobile provided in an embodiment of the present application; Figure 4 for Figure 3 The schematic diagram of the structure of the common piston and spare piston of the automobile clutch cylinder is shown.

[0018] Among them, the reference numerals in the figure are: 1000, automobile clutch slave cylinder; 10, pump body; 101, first oil inlet; 102, second oil inlet; 103, first space; 104, second space; 105, third space; 20, common piston; 30, spare piston; 40, reversing valve; 50, main oil pipe; 60, manual adjustment switch; 70, leakage detection device; 80, adsorption device; 90, oil drain port; 100, one-way valve; 110, oil drain pipe; 120, displacement sensor; 130, piston rod; 140, dust cover; 150, oil blocking ring; 160, reset spring; 170, guide rod; 180, first movable groove; 190, second movable groove; 200, ventilation port. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0025] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] The automobile clutch is a device that transmits or cuts off the engine power by controlling the contact or separation between the pressure plate and the driven plate. The automobile clutch slave cylinder is a component that realizes the separation and engagement of the clutch through hydraulic transmission.

[0027] The automobile clutch slave cylinder in the related technology, under the condition of frequent use and aging of the seals, the piston of the automobile clutch slave cylinder will leak during driving, resulting in insufficient pressure in the hydraulic system, which will cause the clutch to be unable to disengage and the vehicle to be unable to shift gears normally, affecting the safety of vehicle driving.

[0028] Based on this, in order to improve the technical problem in the related art that the vehicle clutch cylinder leaks during driving, causing the vehicle to be unable to shift gears normally, the embodiment of the present application provides the following solution.

[0029] Please also read Figure 1 and Figure 3The embodiment of the present application provides an automobile clutch slave cylinder 1000, which includes a pump body 10, a common piston 20 and a spare piston 30. The common piston 20 is movably arranged inside the pump body 10 along the axial direction of the pump body 10; the spare piston 30 is detachably connected to the inner wall of one end of the pump body 10; the spare piston 30 can move along the axial direction of the pump body 10; wherein the spare piston 30 is used to disconnect the spare piston 30 from the inner wall of the pump body 10 when the common piston 20 leaks, and move along the axial direction of the pump body 10 toward the other end of the pump body 10, so as to push the common piston 20 to move under the action of hydraulic pressure.

[0030] It can be understood that the pump body 10 is a component used as a mounting base, providing structural support and bearing internal hydraulic pressure. The pump body 10 has a hollow cavity. The pump body 10 can be made of metal material, or plastic to reduce the weight of the pump body 10, but is not limited thereto. The common piston 20 is a component used to move along the axial direction of the pump body 10 under the push of hydraulic oil, convert hydraulic energy into mechanical thrust, and drive the push rod to push the clutch pressure plate. The piston is a cylinder and can be made of the same material as the pump body 10. At least one annular sealing ring made of rubber or polyurethane is provided on the common piston 20 to prevent hydraulic oil leakage, maintain system pressure, and ensure hydraulic transmission efficiency. The spare piston 30 is a component used to maintain the function of the automobile clutch cylinder 1000 when the normal piston 20 has internal leakage. The spare piston 30 can adopt the same structure as the normal piston 20, and the spare piston 30 can be adsorbed to the inner wall of one end of the pump body 10 by a magnet, or a clip can be provided on the inner wall of the pump body 10 to clip the spare piston 30 to the inner wall of one end of the pump body 10 through the clip, but it is not limited to this.

[0031] From the above, it can be seen that the automobile clutch slave cylinder 1000 provided in the embodiment of the present application drives the push rod to push the clutch pressure plate through the common piston 20 to disengage the clutch. When the common piston 20 leaks internally, the spare piston 30 is released, so that the spare piston 30 moves to abut against the common piston 20, and the hydraulic pressure in the pump body 10 acts on the spare piston 30, so that the spare piston 30 pushes the common piston 20 to move. In this way, the reliability of the automobile clutch slave cylinder 1000 is improved through the redundant setting of the piston, which buys maintenance time for the sudden failure of the clutch, improves the safety of the automobile during driving, effectively protects the safety of the driver, and reduces the maintenance time and cost of the automobile.

[0032] In some embodiments, please refer to Figures 1 to 3The common piston 20, the spare piston 30 and the inner wall of the pump body 10 together form a first space 103; the spare piston 30 and the inner wall of the pump body 10 together form a second space 104; the automobile clutch slave cylinder 1000 also includes a first oil inlet 101 and a second oil inlet 102, the first oil inlet 101 is arranged on the pump body 10; the output end of the first oil inlet 101 is connected to the first space 103; the second oil inlet 102 is arranged on the pump body 10; the output end of the second oil inlet 102 is connected to the second space 104.

[0033] It can be understood that the end surface of the common piston 20 facing one end of the spare piston 30, the end surface of the spare piston 30 facing one end of the common piston 20, and the arc side surface of the inner wall of the pump body 10 jointly form a first space 103, and oil is injected into the first space 103 through the first oil inlet 101, which can push the common piston 20 to move. The end surface of the spare piston 30 away from the common piston 20, the arc side surface of the inner wall of the pump body 10, and the end surface of one end of the inner wall of the pump body 10 jointly form a second space 104, and oil is injected into the second space 104 through the second oil inlet 102, which can push the spare piston 30 to move to be spaced from the inner wall of the pump body 10 and move toward the other end of the pump body 10.

[0034] In this arrangement, oil is injected into the first space 103 through the first oil inlet 101, so that the common piston 20 can move along the axis direction of the pump body 10 without moving the spare piston 30; oil is injected into the second space 104 through the second oil inlet 102, so that the spare piston 30 moves toward the common piston 20 until it abuts against the common piston 20, and pushes the common piston 20 to move. Before the spare piston 30 abuts against the common piston 20, the common piston 20 will not move relative to the pump body 10. In this way, the common piston 20 and the spare piston 30 can be controlled independently, the wear of the spare piston 30 can be reduced, the service life of the spare piston 30 can be extended, the maintenance frequency of the automobile clutch sub-cylinder 1000 can be reduced, the maintenance cost can be reduced, and the reliability of the automobile clutch sub-cylinder 1000 can be improved.

[0035] Optionally, in some embodiments, see Figures 1 to 3 The automobile clutch slave cylinder 1000 also includes a reversing valve 40 and a main oil pipe 50. The reversing valve 40 has an input end, a first output end and a second output end; the first output end is connected to the input end of the first oil inlet 101; the second output end is connected to the input end of the second oil inlet 102; the output end of the main oil pipe 50 is connected to the input end of the reversing valve 40.

[0036] It can be understood that the reversing valve 40 is a component that controls the flow direction of the fluid by changing the position of the valve core. The reversing valve 40 can be an electromagnetic reversing valve 40, which moves the valve core by controlling the on and off of the electromagnet; it can also be a manual reversing valve 40, which pulls the handle of the reversing valve 40 through a traction line to make the manual reversing valve 40 perform an action, but it is not limited to this. The main oil pipe 50 is a component used to connect the clutch master cylinder and transmit fluid. The main oil pipe 50 can be a steel pipe or a high-pressure rubber pipe, but it is not limited to this.

[0037] With such arrangement, the flow direction of the fluid is controlled by the reversing valve 40, so that the fluid input by the clutch master pump flows into the first space 103 or the second space 104, thereby controlling the movement of the normal piston 20 or the spare piston 30. This can optimize the utilization of the hydraulic system, control the movement of the normal piston 20 or the spare piston 30 according to actual needs, improve the utilization efficiency of the hydraulic system, reduce energy loss, effectively reduce fluid leakage, and improve the overall efficiency of the system.

[0038] Optionally, see Figure 1 and Figure 2 The automobile clutch cylinder 1000 further includes a manual adjustment switch 60 , which is disposed on the automobile operating console; the manual adjustment switch 60 is electrically connected to the reversing valve 40 ; and the manual adjustment switch 60 is used to control the reversing valve 40 .

[0039] It can be understood that the manual adjustment switch 60 is a device for sending a signal to the reversing valve 40. For example, when the reversing valve 40 adopts an electromagnetic reversing valve 40, the manual adjustment switch 60 may include a knob switch and a wire, which is electrically connected to the electromagnetic reversing valve 40 through the wire, and the knob switch is turned to different gears to control the valve core of the electromagnetic reversing valve 40 to move to different positions; or when the reversing valve 40 adopts a manual reversing valve 40, the manual adjustment switch 60 may adopt a lever and a connecting rope, by connecting the connecting rope to the manual reversing valve 40, the lever is moved to pull the manual reversing valve 40, and then the valve core of the reversing valve 40 is controlled to change direction, but it is not limited to this.

[0040] With such arrangement, the driver can actively control the reversing valve 40 to switch direction through the manual adjustment switch 60 so that the fluid enters the first space 103 or the second space 104. In this way, when the automobile clutch sub-cylinder 1000 leaks and causes a long idle stroke, the driver can step on the clutch pedal to allow the fluid to enter the first space 103, keep the clutch pedal and control the reversing valve 40 to switch direction through the manual adjustment switch 60, and step on the clutch pedal again to allow the fluid to enter the second space 104, pushing the spare piston 30. The fluid stored in the first space 103 prevents the spare piston 30 from abutting against the common piston 20, shortening the stroke of the common piston 20 and the spare piston 30, improving the driving controllability and comfort, effectively strengthening the emergency protection function of the automobile clutch sub-cylinder 1000, improving driving safety, and temporarily restoring the clutch function without immediately replacing the clutch sub-cylinder, thereby reducing maintenance costs and time.

[0041] In some embodiments, see Figures 1 to 3 The automobile clutch slave cylinder 1000 also includes a leakage detection device 70, which is arranged on the common piston 20; the leakage detection device 70 is electrically connected to the reversing valve 40; the leakage detection device 70 is used to send a signal to change the direction of the reversing valve 40 when the common piston 20 leaks, so that the fluid enters the second space 104 through the second oil inlet 102 to push out the spare piston 30.

[0042] It can be understood that the leakage detection device 70 is a device for detecting whether the automobile clutch sub-cylinder 1000 is leaking. The leakage of the automobile clutch sub-cylinder 1000 may be a leakage of the pump body 10, or it may be an internal leakage of the common piston 20. The leakage detection device 70 may include a camera, which collects images of the inside and outside of the pump body 10 through the camera, and uses image processing technology to detect whether liquid drops formed by the internal fluid at one end of the pump body 10 appear on the surface of the outside of the pump body 10 and the seams, and the inner wall of the other end of the pump body 10 in the image. If liquid drops appear on the surface or seams of the outside of the pump body 10, it can be determined that the outer wall of the pump body 10 is leaking. If liquid drops appear on the inner wall of the other end of the pump body 10, it can be determined that the common piston 20 is leaking. Leakage occurs, otherwise, the pump body 10 does not leak; or the leakage detection device 70 may include a microphone. When the automobile clutch sub-cylinder 1000 leaks, a whistle, a low-frequency vibration sound or a bubble burst sound may occur, which is significantly different from the sound with a stable frequency during normal operation. The sound inside and outside the pump body 10 can be collected by the microphone, and the collected sound segments are input into the leakage judgment model to determine whether there is a leak inside or outside the pump body 10, wherein the leakage judgment model is obtained by machine learning training using the working data of multiple automobile clutch sub-cylinders 1000, and the working data used for training include the working audio of the automobile clutch sub-cylinder 1000 and the corresponding leakage situation, but is not limited thereto. The leakage detection device 70 may also include a buzzer or a warning light to remind the driver that the automobile clutch sub-cylinder 1000 is leaking.

[0043] With such arrangement, the leakage detection device 70 is used to detect whether the automobile clutch sub-pump 1000 is leaking, and when the automobile clutch sub-pump 1000 is leaking, a signal is sent to the reversing valve 40 to make the reversing valve 40 perform reversal, introduce the fluid into the second space 104, and push the spare piston 30 to abut against the common piston 20 to avoid internal leakage of the common piston 20 and then leakage to the outside of the pump body 10. The leakage of the automobile clutch sub-pump 1000 can be monitored in real time and automatically responded, emergency measures can be taken, the pressure of the hydraulic system can be maintained, and the automobile clutch sub-pump 1000 can be ensured to work normally, thereby improving driving safety, reducing vehicle losses caused by clutch failure, and extending the service life of the automobile clutch sub-pump 1000.

[0044] Optionally, in some embodiments, see Figures 1 to 3 The automobile clutch slave cylinder 1000 further includes an adsorption device 80 , which is disposed at one end of the pump body 10 ; the adsorption device 80 is used to adsorb the spare piston 30 to the inner wall of one end of the pump body 10 .

[0045] It can be understood that the adsorption device 80 is a device for detachably connecting the spare piston 30 to the inner wall of one end of the pump body 10. For example, the adsorption device 80 may include an electromagnet, and the spare piston 30 is made of iron material or includes an iron core. By arranging the electromagnet on the outer wall of one end of the pump body 10, the electromagnet is electrically connected to the reversing valve 40, and the electromagnet is energized to generate magnetic force to adsorb the spare piston 30. When the valve core of the reversing valve 40 moves to introduce the fluid into the second space 104, the reversing valve 40 sends a signal to the electromagnet to cut off the power of the electromagnet to release the spare piston 30; or the adsorption device 80 may include multiple elastic members and multiple top blocks, and multiple grooves are provided on the inner wall of one end of the pump body 10 to connect the multiple elastic members to one end of the pump body 10. One is correspondingly arranged at the bottom of the groove, the length direction of the elastic member is the same as the depth direction of the groove, and multiple top blocks are correspondingly arranged at the other end of the multiple elastic members, and at least part of the top block protrudes from the groove. A plurality of slots are opened on the spare piston 30, and the number of the slots is the same as the number of the grooves. When one end of the spare piston 30 abuts against the inner wall of one end of the pump body 10, the multiple elastic members are compressed so that the ends of the multiple top blocks away from the elastic members are correspondingly arranged in the slots, thereby fixing the spare piston 30. When the valve core of the reversing valve 40 moves to introduce the fluid into the second space 104, as the pressure in the second space 104 increases, the spare piston 30 compresses the multiple elastic members, and the fluid is able to push the spare piston 30 out, but is not limited to this.

[0046] In this way, the spare piston 30 is adsorbed to the inner wall of one end of the pump body 10 through the adsorption device 80. When the common piston 20 leaks internally, the spare piston 30 is released to activate this emergency measure, effectively avoiding false triggering and affecting the normal use of the automobile clutch, improving the stability and reliability of the automobile clutch cylinder 1000, improving the safety of automobile driving, extending the service life of the spare piston 30, reducing the number of times the spare piston 30 is maintained, and reducing the cost of maintaining the spare piston 30.

[0047] Optionally, see Figure 3 The common piston 20 and the inner wall of the pump body 10 jointly form a third space 105; the automobile clutch slave cylinder 1000 also includes an oil discharge port 90, a one-way valve 100 and an oil discharge pipe 110, the oil discharge port 90 is arranged at the other end of the pump body 10; the oil discharge port 90 is connected to the third space 105; the input end of the one-way valve 100 is connected to the output end of the oil discharge port 90; one end of the oil discharge pipe 110 is connected to the output end of the one-way valve 100; the other end of the oil discharge pipe 110 is connected to the input end of the second oil inlet 102.

[0048] It can be understood that the end face of the common piston 20 away from the spare piston 30 and the arc side face of the inner wall of the pump body 10 and the end face of the other end together form a third space 105, and the third space 105 is a low-pressure chamber relative to the first space 103. The oil drain port 90 is a component for discharging the fluid leaked into the third space 105, and the oil drain port 90 is arranged on the side of the pump body 10 close to the ground along the gravity direction. The automobile clutch sub-cylinder 1000 also includes a ventilation port 200, and the ventilation port 200 is arranged on the side of the pump body 10 opposite to the oil drain port 90 along the gravity direction. The fluid in the third space 105 is discharged through the oil drain port 90, and the pressure in the third space 105 is balanced through the ventilation port 200, so that the common piston 20 and the spare piston 30 can be reset. The one-way valve 100 is a valve that allows fluid to pass only in one direction along a preset direction. The one-way valve 100 is arranged between the oil discharge port 90 and the oil discharge pipe 110, and only allows the fluid in the third space 105 to be discharged, but cannot flow back into the third space 105. The oil discharge pipe 110 is a pipe used to connect the output end of the one-way valve 100 and the input end of the second oil inlet 102. The oil discharge pipe 110 can be integrally formed on the pump body 10, or can be an external steel pipe or plastic pipe, but is not limited thereto.

[0049] In this way, by setting an oil discharge port 90 at one end of the pump body 10, the input end of the one-way valve 100 is connected to the output end of the oil discharge port 90, one end of the oil discharge pipe 110 is connected to the output end of the one-way valve 100, and the other end of the oil discharge pipe 110 is connected to the input end of the second oil inlet 102. When the common piston 20 has an internal leakage, the fluid in the first space 103 leaks into the third space 105, and the fluid in the third space 105 can be discharged into the second space 104 as the common piston 20 moves. This effectively avoids the situation in which the fluid is retained in the first space 103 and the third space 105 when the automobile clutch sub-pump 1000 has an internal leakage, resulting in insufficient hydraulic oil and pressure in the automobile clutch system, thereby effectively improving the stability of the automobile clutch sub-pump 1000, improving the resilience of the automobile clutch sub-pump 1000 to faults, improving driving safety, and extending the service life of the automobile clutch system.

[0050] In some embodiments, see Figure 3 The automobile clutch slave cylinder 1000 also includes a displacement sensor 120, which is arranged on the inner wall of the pump body 10; the displacement sensor 120 is located in the second space 104; the displacement sensor 120 is electrically connected to the reversing valve 40; the displacement sensor 120 is used to detect the displacement distance of the spare piston 30, and then obtain the fluid volume in the third space 105.

[0051] It can be understood that the displacement sensor 120 is a sensor for detecting the displacement distance of the standby piston 30. When the common piston 20 leaks internally, the fluid enters the third space 105 from the first space 103, and the common piston 20 continues to move, and the fluid in the third space 105 is introduced into the second space 104 through the oil drain pipe 110. The fluid enters the second space 104 and pushes the standby piston 30 to the other end of the pump body 10. According to the displacement distance of the standby piston 30, the volume of the fluid in the third space 105 can be calculated. When the volume of the fluid in the third space 105 reaches a preset value, a signal is sent to the reversing valve 40, so that the reversing valve 40 changes the flow direction of the fluid to enter the second space 104 and push the standby piston 30. The displacement sensor 120 can be a resistive displacement sensor 120 or a photoelectric displacement sensor 120, but is not limited thereto.

[0052] In this arrangement, when internal leakage occurs in the clutch cylinder 1000 of the automobile, the fluid enters the third space 105 from the first space 103 through the common piston 20, and the common piston 20 continues to move to discharge the fluid in the third space 105 into the second space 104 through the drain pipe 110. When the displacement sensor 120 detects that the movement distance of the spare piston 30 reaches a preset value, it means that the volume of the fluid leaked from the first space 103 to the third space 105 reaches a preset value, and the displacement sensor 120 sends a signal to the reversing valve 40 to move the valve core of the reversing valve 40. , and then the fluid is diverted to the second space 104, pushing the spare piston 30 to move to prevent the fluid from continuing to enter the third space 105, which can prevent the continuous internal leakage of the automobile clutch sub-pump 1000 and cause clutch failure, and guide the leaked fluid back to the hydraulic system for reuse, thereby reducing the loss of the automobile clutch sub-pump 1000 when it fails, reducing the maintenance cost of the automobile clutch sub-pump 1000, and improving the response speed of the spare piston 30 when the automobile clutch sub-pump 1000 fails, thereby improving the reliability and safety of the automobile clutch sub-pump 1000.

[0053] In some embodiments, see Figures 1 to 3 The automobile clutch slave cylinder 1000 also includes a piston rod 130, a dust cover 140 and an oil blocking ring 150. The piston rod 130 is arranged at the end of the common piston 20 away from the spare piston 30; at least part of the piston rod 130 protrudes from the pump body 10; the dust cover 140 is arranged at one end of the pump body 10; the dust cover 140 is sleeved on the part of the piston rod 130 protruding from the pump body 10; the dust cover 140 is arranged at the end of the dust cover 140 away from the pump body 10; the inner wall of the oil blocking ring 150 slides and rubs against the outer wall of the piston rod 130.

[0054] It can be understood that the piston rod 130 is a structure for connecting the common piston 20 and the clutch push rod. The piston rod 130 can be made of the same material as the common piston 20. The dust cover 140 is a component used to cover the part of the piston rod 130 protruding from the pump body 10 to prevent foreign matter from adhering to the surface of the piston rod 130 and affecting the movement of the piston rod 130. The dust cover 140 can be extended and retracted along the axial direction of the pump body 10. The dust cover 140 can be made of rubber material or plastic material, but is not limited to this. The oil blocking ring 150 is fixedly arranged at one end of the dust cover 140 away from the pump body 10. The oil blocking ring 150 can be made of the same material as the dust cover 140. The oil blocking ring 150 is used to block the leaked fluid from flowing along the piston rod 130 to the clutch when the automobile clutch sub-cylinder 1000 leaks.

[0055] In this way, by sleeved the dust cover 140 on the piston rod 130, and setting an oil-blocking ring 150 at the end of the dust cover 140 away from the pump body 10, when the clutch sub-cylinder 1000 of the automobile leaks, it can avoid the fluid flowing along the piston rod 130 to the clutch, resulting in incomplete power transmission of the clutch, thereby effectively improving the safety of automobile driving, and the piston rod 130 can be lubricated by a small amount of seeping fluid, thereby reducing the friction between the piston rod 130 and the pump body 10, thereby enhancing the driving experience of the vehicle.

[0056] Optionally, see Figure 4 The common piston 20 is provided with a first movable groove 180 along its own axis; the piston rod 130 is provided with a second movable groove 190 along its own axis direction; the automobile clutch slave cylinder 1000 also includes a guide rod 170, one end of which is connected to the end of the spare piston 30 facing the common piston 20; the guide rod 170 can move along the axis direction of the common piston 20; at least part of the guide rod 170 is penetrated in the first movable groove 180; the outer wall of the guide rod 170 slides and rubs with the inner wall of the movable groove.

[0057] It can be understood that the guide rod 170 is a component used to move the spare piston 30 in a preset direction, and can be made of the same material as the common piston 20. One end of the guide rod 170 can be provided with a thread, and a threaded hole is provided at one end of the spare piston 30 facing the common piston 20, so that the guide rod 170 and the spare piston 30 are connected by threads; or one end of the guide rod 170 can be welded to the spare piston 30, but is not limited thereto. The guide rod 170 can move along the first moving groove 180 to the second moving groove 190.

[0058] With such arrangement, one end of the guide rod 170 is connected to the spare piston 30, and the guide rod 170 can be moved into the movable groove along the length direction of the piston rod 130, so that the moving direction of the spare piston 30 can be clearly determined, thereby preventing the spare piston 30 from tilting or flipping in the pump body 10, and further preventing the spare piston 30 from internal leakage, thereby improving the reliability of the spare piston 30, effectively improving the safety of the automobile clutch cylinder 1000, reducing the maintenance frequency of the automobile, and reducing the cost required for maintenance.

[0059] In some embodiments, refer to 3, the automobile clutch slave cylinder 1000 also includes a return spring 160, one end of the return spring 160 is arranged at the end of the common piston 20 away from the spare piston 30; the other end of the return spring 160 abuts against the inner wall of the other end of the pump body 10; the return spring 160 is used to push the common piston 20 to move the common piston 20 toward one end of the pump body 10.

[0060] It can be understood that the return spring 160 is arranged in the pump body 10 to return the common piston 20 or the spare piston 30 to the end of the pump body 10 away from the dust cover 140. The return spring 160 can be made of carbon spring steel or silicon manganese spring steel, but is not limited thereto.

[0061] In this way, the return spring 160 is arranged in the pump body 10, and at the end of the common piston 20 away from the spare piston 30, the clutch is pressed to move the common piston 20 toward the dust cover 140, compressing the return spring 160. After the clutch is released, the return spring 160 is retracted to push the common piston 20 back to one end of the pump body 10, which is beneficial to restore the pressure of the hydraulic system and ensure the safety of the vehicle during driving. In addition, the return spring 160 is located in the pump body 10 and is not easily exposed to impurities to hinder its extension and retraction, thereby improving the reliability of the automobile clutch sub-cylinder 1000 and reducing the time and cost of maintaining the automobile clutch sub-cylinder 1000.

[0062] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A clutch cylinder for an automobile, characterized in that: include: Pump body; A common piston, wherein the common piston is movably disposed inside the pump body along the axial direction of the pump body; as well as A spare piston, the spare piston being detachably connected to the inner wall of one end of the pump body; the spare piston being able to move along the axial direction of the pump body; Wherein, when the common piston leaks, the spare piston is used to disconnect from the inner wall of the pump body and move along the axial direction of the pump body toward the other end of the pump body to push the common piston to move under the action of hydraulic pressure.

2. The automobile clutch slave cylinder according to claim 1, characterized in that: The common piston, the spare piston and the inner wall of the pump body together form a first space; the spare piston and the inner wall of the pump body together form a second space; and further comprising: a first oil inlet, the first oil inlet being disposed on the pump body; an output end of the first oil inlet being connected to the first space; and A second oil inlet is provided on the pump body; an output end of the second oil inlet is connected to the second space.

3. The automobile clutch slave cylinder according to claim 2, characterized in that: Also includes: A reversing valve, the reversing valve having an input end, a first output end and a second output end; the first output end is connected to the input end of the first oil inlet; The second output end is connected to the input end of the second oil inlet; as well as A main oil pipe, wherein the output end of the main oil pipe is connected to the input end of the reversing valve.

4. The automobile clutch slave cylinder according to claim 3, characterized in that: It also includes a manual adjustment switch, which is arranged on the automobile operating console; the manual adjustment switch is electrically connected to the reversing valve; and the manual adjustment switch is used to control the reversing valve.

5. The automobile clutch slave cylinder according to claim 3, characterized in that: It also includes a leakage detection device, which is arranged on the common piston; the leakage detection device is electrically connected to the reversing valve; the leakage detection device is used to send a signal to make the reversing valve reverse when the common piston leaks, so that the fluid enters the second space through the second oil inlet to push out the spare piston.

6. The automobile clutch slave cylinder according to claim 1, characterized in that: It also includes an adsorption device, which is arranged at one end of the pump body; the adsorption device is used to adsorb the spare piston to the inner wall of one end of the pump body.

7. The automobile clutch slave cylinder according to claim 3, characterized in that: The common piston and the inner wall of the pump body together form a third space; the automobile clutch slave cylinder also includes: An oil discharge port, the oil discharge port being arranged at the other end of the pump body; the oil discharge port being connected to the third space; a one-way valve, the input end of the one-way valve being connected to the output end of the oil discharge port; and An oil drain pipe, one end of which is connected to the output end of the one-way valve; and the other end of which is connected to the input end of the second oil inlet.

8. The automobile clutch slave cylinder according to claim 7, characterized in that: It also includes a displacement sensor, which is arranged on the inner wall of the pump body; the displacement sensor is located in the second space; the displacement sensor is electrically connected to the reversing valve; the displacement sensor is used to detect the displacement distance of the spare piston, and then obtain the fluid volume in the third space.

9. The automobile clutch slave cylinder according to claim 1, characterized in that: Also includes: A piston rod, the piston rod being arranged at an end of the common piston away from the spare piston; at least a portion of the piston rod protrudes from the pump body; A dust cover, the dust cover is arranged at one end of the pump body; the dust cover is sleeved on the portion of the piston rod protruding from the pump body; as well as The oil blocking ring and the dust cover are arranged at one end of the dust cover away from the pump body; the inner wall of the oil blocking ring slides and rubs with the outer wall of the piston rod.

10. The automobile clutch slave cylinder according to claim 1, characterized in that: It also includes a return spring, one end of which is arranged at the end of the common piston away from the spare piston; the other end of the return spring abuts against the inner wall of the other end of the pump body; the return spring is used to push the common piston to move the common piston toward one end of the pump body.

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