Remote clutch pump

Abstract

The invention relates to the technical field of automobile parts, and provides a remote clutch pump which comprises a pump body and a valve element unit, the pump body is provided with a mounting cavity, a first oil duct, a second oil duct and a third oil duct, the first oil duct, the second oil duct and the third oil duct are communicated with the mounting cavity, the first oil duct is communicated with a master cylinder, the second oil duct is communicated with a clutch booster cylinder, and the third oil duct is communicated with a clutch booster cylinder. The third oil duct is communicated with a high-pressure medium source; the valve element unit is movably arranged in the installation cavity so that the installation cavity can be movably divided into a first cavity and a second cavity which are relatively sealed, the first cavity is communicated with the first oil channel and the second oil channel, the second cavity is communicated with the third oil channel, and part of the valve element unit is movably plugged in the first oil channel. The vehicle can remotely operate the clutch to be separated, the pedal clutch separation function in the cab can also be achieved, the functions are considered, and the structure is simple.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to a remote clutch pump. Background Art

[0002] With the continuous development of special vehicles, the demand is constantly increasing, and the types of vehicles are gradually increasing. Many special vehicles need to operate the clutch separation and engagement from outside the cab to achieve the power separation and engagement of various power take-off equipment and upper equipment.

[0003] Currently, the clutches of medium and heavy-duty special-purpose vehicles are mostly hydraulically assisted. The clutch pedal in the cab compresses the hydraulic oil in the master cylinder, which enters the clutch slave cylinder (or power cylinder) through the pipeline, thereby pushing the clutch fork to move and achieve clutch disengagement. The clutch cannot be separated or engaged outside the cab. Summary of the invention

[0004] The invention provides a remote clutch pump, which is used to solve the defect in the prior art that the clutch cannot be separated and engaged outside the cab, and realizes the functions of both foot clutch and remote clutch.

[0005] The present invention provides a remote clutch pump, comprising: A pump body, the pump body having a mounting cavity and a first oil passage, a second oil passage and a third oil passage communicating with the mounting cavity, the first oil passage communicating with a master pump, the second oil passage communicating with a clutch booster cylinder, and the third oil passage communicating with a high-pressure medium source; A valve core unit is movably arranged in the installation cavity to movably separate the installation cavity into a relatively sealed first chamber and a second chamber, the first chamber is connected to the first oil passage and the second oil passage, the second chamber is connected to the third oil passage, and part of the valve core unit is movably blocked in the first oil passage.

[0006] According to a remote clutch pump provided by the present invention, the valve core unit includes a first piston assembly and a second piston assembly, the first piston assembly is movably arranged in the second chamber, one end of the second piston assembly is penetrated into the first piston assembly, and the other end is arranged in the first chamber, and is movably abutted with the first oil channel.

[0007] According to a remote clutch pump provided by the present invention, the second piston assembly includes an inner spring, an inner piston, a piston head and a plug; the first piston assembly is provided with a through hole extending along the axial direction of the mounting cavity; the plug is sealed at one end of the through hole away from the first chamber; one end of the inner piston is limitedly connected to the through hole; a piston head is provided on the other end of the inner piston; the piston head is movably abutted against the first oil channel; the inner spring is provided in the through hole and is located between the inner piston and the plug.

[0008] According to a remote clutch pump provided by the present invention, a first limiting step is protruding from the inner wall of one end of the through hole away from the plug, and a first matching boss is protruding from the end of the inner piston extending into the through hole, and the first limiting boss is movably abutted against the first matching boss to limit the axial movement of the inner piston.

[0009] According to a remote clutch pump provided by the present invention, the first piston assembly includes an outer piston and an outer spring, the outer piston has an inner end and an outer end arranged opposite to each other along its own radial direction, the inner end extends into the first chamber and is slidably arranged, and the outer end is slidably arranged in the second chamber, the outer spring is sleeved on the outer piston, and the outer spring abuts between the inner wall of the mounting chamber and the outer piston.

[0010] According to a remote clutch pump provided by the present invention, a second limiting step is provided on the inner wall of the mounting cavity, the second limiting step extends along the axis of the mounting cavity in a direction away from the first oil channel, the second limiting step cooperates with the outer piston to seal and separate the first chamber and the second chamber, the second limiting step is spaced apart from the inner wall of the second chamber, a second mating boss is formed between the outer end and the inner end, the second limiting step and the second mating boss are movably abutted to limit the axial movement of the outer piston.

[0011] According to a remote clutch pump provided by the present invention, at least one sealing ring is provided between the inner end and the inner wall of the first chamber.

[0012] According to a remote clutch pump provided by the present invention, at least one sealing ring is provided between the outer end and the inner wall of the second chamber.

[0013] According to a remote clutch pump provided by the present invention, the pump body includes a shell and an end cover, the installation cavity is arranged in the shell, an opening communicating with the inner cavity is opened on the shell, the end cover covers the opening, and the third oil channel is opened on the end cover.

[0014] According to a remote clutch pump provided by the present invention, a side of the end cover facing the installation cavity is recessed outward to form a relief portion, and the relief portion is used to relieve one end of the valve core unit facing the end cover.

[0015] The remote clutch pump provided by the present invention, when the clutch separation function is remotely operated, controls the third oil channel in the remote clutch pump to communicate with a high-pressure medium source (such as high-pressure air or high-pressure oil). When the high-pressure medium enters the pump body through the third oil channel, it acts on the valve core unit to push the valve core unit to move in the installation cavity. The movement of the valve core unit will change the pressure distribution of the first chamber and the second chamber. In particular, when the high-pressure medium enters the second chamber, it will push part of the structure of the valve core unit to block the first oil channel. Thereby, the oil flow path between the first oil channel (connected to the master pump) and the second oil channel (connected to the clutch booster cylinder) is effectively cut off. At the same time, due to the movement of the valve core unit and the incompressibility of the oil in the first chamber, the oil in the first chamber will be compressed and pushed into the clutch booster cylinder through the second oil channel, thereby realizing remote separation of the clutch.

[0016] When the driver steps on the clutch pedal in the cab, the master pump generates high-pressure oil. This oil enters the first chamber of the remote clutch pump through the first oil channel. Since there is no high-pressure medium acting on the third oil channel at this time, the valve core unit remains in the initial position or is reset by the action of the reset mechanism such as the internal spring, and the flow path between the first oil channel and the second oil channel remains unobstructed. The high-pressure oil smoothly enters the second oil channel from the first oil channel, and is finally pushed into the clutch booster cylinder to achieve the pedal separation of the clutch.

[0017] The remote clutch pump of the present application combines the functions of foot clutch and remote clutch. By controlling the high-pressure medium input of the third oil channel, the driver can flexibly switch the clutch operation mode inside and outside the cab, achieving both functional considerations and a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is an overall structural diagram of a remote clutch pump provided by the present invention.

[0020] Figure 2 This is an initial position diagram of a working piston of a remote clutch pump provided by the present invention.

[0021] Figure 3 The present invention provides a diagram of the end position of movement of a working piston of a remote clutch pump.

[0022] Reference numerals: 1. Shell; 11. First chamber; 12. Second chamber; 13. Second limiting step; 14. First oil passage; 15. Second oil passage; 2. Inner piston; 3. Piston head; 4. End cover; 41. Third oil passage; 5. Inner spring; 6. Plug; 7. outer piston; 71. inner end; 72. outer end; 73. first sealing ring; 74. second sealing ring; 75. third sealing ring; 76. through hole; 77. first limiting step; 8. External spring. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean 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 being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] Combine the following Figures 1 to 3 , a remote clutch pump provided by an embodiment of the present invention is described in detail through specific embodiments and application scenarios.

[0029] In the embodiment of the present invention, Figures 1 to 3 As shown, the remote clutch pump includes a pump body and a valve core unit, the pump body has an installation cavity and a first oil passage 14, a second oil passage 15 and a third oil passage 41 connected to the installation cavity, the first oil passage 14 is connected to the master pump, the second oil passage 15 is connected to the clutch booster cylinder, and the third oil passage 41 is connected to the high-pressure medium source; the valve core unit is movably arranged in the installation cavity to movably separate the installation cavity into a relatively sealed first chamber 11 and a second chamber 12, the first chamber 11 is connected to the first oil passage 14 and the second oil passage 15, the second chamber 12 is connected to the third oil passage 41, and part of the valve core unit is movably blocked in the first oil passage 14.

[0030] The installation cavity serves as the activity space of the valve core unit. The installation cavity provides the valve core unit with a necessary range of motion, ensuring that the valve core unit can move smoothly in the cavity, thereby achieving opening and closing control of the oil channel.

[0031] The first oil passage 14 is connected to the master pump and is responsible for introducing the high-pressure oil generated by the master pump into the first chamber 11 inside the pump body. When the foot clutch is operated, the first oil passage 14 is the main path for the oil to circulate.

[0032] The second oil passage 15 is connected to the clutch booster cylinder and is the final passage for the oil to push the clutch release fork and realize clutch release. Whether it is a foot-operated clutch or a remote clutch operation, the oil needs to be transported to the clutch booster cylinder through this oil passage.

[0033] The third oil passage 41 is connected to a high-pressure medium source and is used to introduce a high-pressure medium (such as high-pressure air or high-pressure oil) during remote clutch operation. The opening and closing of the third oil passage 41 directly determines whether the remote clutch function is enabled.

[0034] The valve core unit is movably arranged in the installation cavity. The valve core unit can move freely in the installation cavity, which is the basis for realizing the opening and closing control of the oil channel. The position change of the valve core unit directly affects the pressure distribution of the first chamber 11 and the second chamber 12, as well as the on-off state of the oil channel.

[0035] The installation cavity is movably divided into a relatively sealed first chamber 11 and a second chamber 12, which ensures that the oil can flow along a preset path under specific conditions and avoids leakage and mixed flow of the oil.

[0036] The first chamber 11 is connected to the first oil channel 14 and the second oil channel 15. When the foot clutch is operated, the first chamber 11 serves as the main receiving area for the oil, receives the high-pressure oil generated by the master pump through the first oil channel 14, and transports the oil to the clutch booster cylinder through the second oil channel 15.

[0037] The second chamber 12 is connected to the third oil passage 41. When the remote clutch is operated, the second chamber 12 serves as a receiving area for the high-pressure medium and receives the high-pressure medium provided by the high-pressure medium source through the third oil passage 41. The introduction of the high-pressure medium will push the valve core unit to move, thereby changing the pressure distribution of the first chamber 11 and the second chamber 12, and realizing the opening and closing control of the oil passage.

[0038] Part of the valve core unit is movably blocked in the first oil passage 14. When the high-pressure medium enters the second chamber 12, it will push the valve core unit to move to the position of blocking the first oil passage 14. This action cuts off the oil flow path between the first oil passage 14 and the second oil passage 15, ensuring the independence of the remote clutch operation. At the same time, due to the incompressibility of the oil in the first chamber 11, the oil will be compressed and pushed into the clutch booster cylinder through the second oil passage 15, realizing the remote separation of the clutch.

[0039] The remote clutch pump of the present application, when remotely operating the clutch separation function, controls the third oil channel 41 in the remote clutch pump to communicate with the high-pressure medium source (such as high-pressure air or high-pressure oil). When the high-pressure medium enters the pump body through the third oil channel 41, it will act on the valve core unit to push the valve core unit to move in the installation cavity. The movement of the valve core unit will change the pressure distribution of the first chamber 11 and the second chamber 12. In particular, when the high-pressure medium enters the second chamber 12, it will push part of the structure of the valve core unit to block the first oil channel 14. Thereby, the oil flow path between the first oil channel 14 (connected to the master pump) and the second oil channel 15 (connected to the clutch booster cylinder) is effectively cut off. At the same time, due to the movement of the valve core unit and the incompressibility of the oil in the first chamber 11, the oil in the first chamber 11 will be compressed and pushed into the clutch booster cylinder through the second oil channel 15, thereby realizing the remote separation of the clutch.

[0040] When the driver steps on the clutch pedal in the cab, the master pump generates high-pressure oil. This oil enters the first chamber 11 of the remote clutch pump through the first oil passage 14. Since there is no high-pressure medium acting on the third oil passage 41 at this time, the valve core unit remains in the initial position or is reset by the action of the reset mechanism such as the inner spring 5, and the flow path between the first oil passage 14 and the second oil passage 15 remains unobstructed. The high-pressure oil smoothly enters the second oil passage 15 from the first oil passage 14, and is finally pushed into the clutch booster cylinder to achieve the pedal separation of the clutch.

[0041] The remote clutch pump of the present application combines the functions of foot clutch and remote clutch. By controlling the high-pressure medium input of the third oil channel 41, the driver can flexibly switch the clutch operation mode inside and outside the cab, achieving both functional considerations and a simple structure.

[0042] Reference Figure 2 and Figure 3 According to a remote clutch pump provided by the present invention, the valve core unit includes a first piston assembly and a second piston assembly. The first piston assembly is movably arranged in the second chamber 12. One end of the second piston assembly is inserted into the first piston assembly, and the other end is arranged in the first chamber 11, and is movably abutted against the first oil channel 14.

[0043] It can be understood that the first piston assembly is movably disposed in the second chamber 12. When the third oil passage 41 is connected to the high-pressure medium source, the high-pressure medium enters the second chamber 12 and acts on the first piston assembly, pushing it to move to the left (assuming that the forward direction is from right to left). The movement of the first piston assembly will drive the second piston assembly to move together, thereby changing the pressure distribution of the first chamber 11 and the second chamber 12, and realizing the control of the oil circuit.

[0044] One end of the second piston assembly is inserted into the first piston assembly, and the other end is located in the first chamber 11 and is movably abutted against the first oil channel 14. When the first piston assembly is pushed by the high-pressure medium, it will drive the second piston assembly to move together. The end of the second piston assembly can block the first oil channel 14, cut off the oil flow path between the master pump and the first chamber 11, and prevent the oil from flowing back to the master pump. Since the second piston assembly is partially located in the first chamber 11, when the first piston assembly moves, it will also compress the oil in the first chamber 11, and transmit the pressure to the clutch booster cylinder through the second oil channel 15, prompting the clutch release fork to move. When the external pressure disappears, the built-in spring or other reset mechanism will push the first piston assembly back to the initial position, and the second piston assembly will also reset accordingly, releasing the blockage of the first oil channel 14, ready for the next round of operation.

[0045] Reference Figure 2 and Figure 3 According to a remote clutch pump provided by the present invention, the second piston assembly includes an inner spring 5, an inner piston 2, a piston head 3 and a plug 6. The first piston assembly is provided with a through hole 76 extending along the axial direction of the installation cavity. The plug 6 is blocked at one end of the through hole 76 away from the first chamber 11. One end of the inner piston 2 is limitedly connected in the through hole 76. The other end of the inner piston 2 is provided with a piston head 3. The piston head 3 is movably abutted against the first oil channel 14. The inner spring 5 is arranged in the through hole 76 and is located between the inner piston 2 and the plug 6.

[0046] It can be understood that the inner spring 5 is located in the through hole 76 of the first piston assembly, between the inner piston 2 and the plug 6. When the external pressure (such as high-pressure air or hydraulic oil) disappears, the inner spring 5 will push the inner piston 2 and the piston head 3 thereon to move away from the first oil passage 14, so that the piston head 3 moves away from the first oil passage 14 and returns to the initial state, ready for the next round of operation.

[0047] Under normal conditions, the inner spring 5 pushes the inner piston 2 to the far left (assuming the forward direction is from right to left), and the piston head 3 is kept separated from the first oil passage 14 to ensure that the oil can flow freely. When remote control is required, the presence of the inner spring 5 also ensures that even if the outer piston 7 continues to move left, the piston head 3 will be close to the first oil passage 14 to prevent oil from flowing back.

[0048] One end of the inner piston 2 is limitedly connected to the through hole 76 of the first piston assembly, and the other end is provided with a piston head 3. When the first piston assembly is pushed by the high-pressure medium introduced into the third oil passage 41, it drives the inner piston 2 to move together. The movement of the inner piston 2 not only changes the pressure distribution in the first chamber 11, but also blocks the first oil passage 14 through the piston head 3 at its end, cutting off the oil flow path.

[0049] The piston head 3 is mounted at one end of the inner piston 2 and is in active contact with the first oil passage 14. When the clutch needs to be remotely controlled to be disengaged, the piston head 3 will move to the left under the drive of the inner piston 2 and tightly seal the first oil passage 14, preventing the oil from flowing into the master pump, thus ensuring the stable operation of the system.

[0050] The plug 6 blocks the end of the through hole 76 of the first piston assembly away from the first chamber 11. The plug 6 fixes one end of the through hole 76, provides a limit point for the inner piston 2, ensures that the inner piston 2 will not be separated from the through hole 76, and maintains the structural integrity of the system. The close fit between the plug 6 and the through hole 76 further enhances the sealing performance of the system, prevents leakage of oil or high-pressure medium, and improves the overall reliability.

[0051] The inner spring 5, inner piston 2, piston head 3 and plug 6 in this embodiment work together to ensure that the system can identify the current operating mode - pedal mode or remote mode according to whether high-pressure medium acts on the third oil channel 41, and accurately perform the corresponding clutch action.

[0052] Specifically, in the remote control mode, as the first piston assembly moves, the piston head 3 first blocks the first oil channel 14, and then the first piston assembly compresses the oil in the first chamber 11 and pushes it into the clutch booster cylinder through the second oil channel 15, thereby achieving clutch disengagement.

[0053] Reference Figure 2 and Figure 3 According to a remote clutch pump provided by the present invention, a first limiting step 77 is protrudingly provided on the inner wall of one end of the through hole 76 away from the plug 6, and a first matching boss is protrudingly provided on the end of the inner piston 2 extending into the through hole 76, and the first limiting boss is movably abutted against the first matching boss to limit the movement of the inner piston 2 in the axial direction.

[0054] It can be understood that the cooperation between the first limiting step 77 and the first matching boss provides a clear limit for the movement of the inner piston 2 in the through hole 76. This ensures that the inner piston 2 can only move to a predetermined position in the axial direction, avoiding structural damage or functional failure caused by excessive movement. At the same time, through the precise design of the first limiting step 77 and the first matching boss, the movement range of the inner piston 2 can be strictly controlled, improving the operational stability and accuracy of the remote clutch pump.

[0055] Reference Figure 2 and Figure 3According to a remote clutch pump provided by the present invention, the first piston assembly includes an outer piston 7 and an outer spring 8. The outer piston 7 has an inner end 71 and an outer end 72 which are arranged opposite to each other along its own radial direction. The inner end 71 extends into the first chamber 11 and is slidably arranged. The outer end 72 is slidably arranged in the second chamber 12. The outer spring 8 is sleeved on the outer piston 7, and the outer spring 8 abuts between the inner wall of the mounting cavity and the outer piston 7.

[0056] It is understandable that the outer piston 7 has an inner end 71 and an outer end 72 which are arranged opposite to each other along its radial direction. The inner end 71 extends into the first chamber 11 and can slide therein, so that the outer piston 7 can respond to the pressure change in the first chamber 11 and affect the flow of oil in the first chamber 11.

[0057] The outer end 72 is slidably disposed in the second chamber 12 , and can respond to pressure changes of a high-pressure medium (such as high-pressure air or hydraulic oil) in the second chamber 12 , thereby pushing the outer piston 7 to move as a whole.

[0058] When the high-pressure medium is introduced into the third oil passage 41, the pressure in the second chamber 12 will act on the outer end 72 of the outer piston 7, pushing the outer piston 7 to move to the left as a whole (assuming that the forward direction is from right to left). The system is allowed to control the action of the clutch through external pressure. The movement of the outer piston 7 changes the pressure distribution between the first chamber 11 and the second chamber 12, thereby affecting the on-off state of the oil circuit. For example, in the remote operation mode, the movement of the outer piston 7 can cause the second piston assembly to block the first oil passage 14, cutting off the oil flow path between the master pump and the booster cylinder.

[0059] The outer spring 8 is mounted on the outer piston 7 and abuts against the inner wall of the mounting cavity and the outer piston 7. When the external pressure disappears, the outer spring 8 pushes the outer piston 7 to the right to restore it to its initial position. This ensures that the system can return to normal after each operation and is ready for the next round of operation instructions. Under normal conditions, the outer spring 8 pushes the outer piston 7 to the far right, allowing the oil in the first chamber 11 to flow freely without unnecessary obstruction. This ensures the normal operation of the foot clutch.

[0060] Reference Figure 2 and Figure 3 According to a remote clutch pump provided by the present invention, a second limiting step 13 is provided on the inner wall of the mounting cavity, and the second limiting step 13 extends along the axis of the mounting cavity in a direction away from the first oil passage 14. The second limiting step 13 cooperates with the outer piston 7 to seal and separate the first chamber 11 and the second chamber 12. The second limiting step 13 is spaced apart from the inner wall of the second chamber 12, and a second matching boss is formed between the outer end 72 and the inner end 71. The second limiting step 13 and the second matching boss are movably abutted to limit the movement of the outer piston 7 in the axial direction.

[0061] It is understandable that the second limiting step 13 is located on the inner wall of the installation cavity and extends along the axis of the installation cavity away from the first oil passage 14. The second limiting step 13 cooperates with the outer piston 7 to seal and separate the first chamber 11 and the second chamber 12.

[0062] The second limiting step 13 also limits the moving range of the outer piston 7 to prevent the outer piston 7 from excessively moving, thereby ensuring the stability and safety of the system.

[0063] The second mating boss is formed between the inner end 71 and the outer end 72 of the outer piston 7. The second mating boss is movably abutted against the second limiting step 13, and is used to limit the axial movement of the outer piston 7, ensuring that the outer piston 7 can accurately move to a predetermined position when acted upon by a high-pressure medium, and can reliably reset when no high-pressure medium acts. In this embodiment, the movement distance of the outer piston 7 can be precisely controlled through the interaction between the second mating boss and the second limiting step 13, thereby improving the clutch operation accuracy.

[0064] Reference Figure 2 and Figure 3 According to a remote clutch pump provided by the present invention, at least one sealing ring is provided between the inner end 71 and the inner wall of the first chamber 11 .

[0065] Specifically, a first sealing ring 73 and a second sealing ring 74 are arranged between the inner end 71 and the inner wall of the first chamber 11. The first sealing ring 73 and the second sealing ring 74 prevent the oil from leaking from the gap between the inner end 71 and the inner wall of the first chamber 11. This ensures that the oil can flow along a predetermined path during the operation of the remote clutch pump, maintains the stability of the internal pressure of the pump, and avoids performance degradation or failure.

[0066] Reference Figure 2 and Figure 3 According to a remote clutch pump provided by the present invention, at least one sealing ring is provided between the outer end 72 and the inner wall of the second chamber 12 .

[0067] Specifically, a third sealing ring 75 is provided between the outer end 72 and the inner wall of the second chamber 12. The third sealing ring 75 is sealed against the outer end 72 and the inner wall of the second chamber 12. The main function of the third sealing ring 75 is to ensure close contact between the outer end 72 and the inner wall of the second chamber 12, thereby preventing oil leakage, maintaining the stability of the internal pressure of the pump, preventing oil loss, and ensuring the output performance and efficiency of the pump.

[0068] Reference Figure 2 and Figure 3According to a remote clutch pump provided by the present invention, the pump body includes a shell 1 and an end cover 4, the installation cavity is arranged in the shell 1, the shell 1 is provided with an opening communicating with the inner cavity, the end cover 4 covers the opening, and the third oil passage 41 is opened on the end cover 4.

[0069] It is understood that the housing 1, as the main structural component of the pump body, includes a mounting cavity and provides a solid external frame for the entire remote clutch pump, ensuring that the internal components (such as the first chamber 11, the second chamber 12, the valve core unit, etc.) can operate stably.

[0070] A mounting cavity is provided in the housing 1 for accommodating and fixing the valve core unit and other components, thereby ensuring the compactness and integration of the system.

[0071] The housing 1 is provided with an opening communicating with the inner cavity, so as to facilitate installation of the valve core unit in the installation cavity.

[0072] The end cover 4 covers the opening on the housing 1. The end cover 4 tightly fits the opening on the housing 1 to ensure the sealing of the installation cavity, prevent leakage of oil or high-pressure medium, and improve the reliability of the system. The end cover 4 is provided with a third oil passage 41, which is connected to a high-pressure medium source (such as high-pressure air or hydraulic oil), so that the external pressure can act on the second chamber 12 to drive the outer piston 7 to move.

[0073] Reference Figure 2 and Figure 3 According to a remote clutch pump provided by the present invention, a side of the end cover 4 facing the installation cavity is recessed outward to form a avoidance portion, and the avoidance portion is used to avoid one end of the valve core unit facing the end cover 4.

[0074] It is understandable that the avoidance portion is located on the side of the end cover 4 facing the installation cavity, forming an outwardly concave structure. The main function of the avoidance portion is to provide sufficient movement space for the end of the valve core unit facing the end cover 4 to ensure that it will not interfere with or collide with the end cover 4 during movement. The design of the avoidance portion can also prevent the valve core unit from hitting the end cover 4 due to excessive movement in extreme cases (such as sudden release of high-pressure medium), protect internal components from damage, and extend the service life of the system.

[0075] When the external pressure disappears, the spring or other reset mechanism can smoothly push the valve core unit back to the initial position without being hindered by the end cover 4, ensuring that the system can be accurately reset after each operation.

[0076] In one embodiment, under normal conditions, Figure 1, the outer spring 8 pushes the outer piston 7 to move to the left end, which is limited by the end cover 4. The first limiting step 77 drives the inner piston 2 to move right, so that the piston head 3 is out of contact with the first oil channel 14. At the same time, the inner spring 5 pushes the inner piston 2 to the far left; the third oil channel 41 is not ventilated or oiled; the first oil channel 14 is connected to the clutch pedal master cylinder, the second oil channel 15 is connected to the clutch booster cylinder (slave cylinder), and the first chamber 11, the first oil channel 14, the second oil channel 15, the master cylinder, the slave cylinder, etc. are all filled with oil.

[0077] When the driver steps on the clutch pedal, the high-pressure oil of the master cylinder can enter the first chamber 11 through the first oil channel 14, and enter the clutch booster cylinder (slave cylinder) through the second oil channel 15. The booster cylinder pushes the clutch release fork to realize clutch release; when the pedal returns to its original position, the high-pressure oil of the booster cylinder passes through the second oil channel 15, the first chamber 11, and the first oil channel 14, and returns to the clutch master cylinder; that is, conventional clutch separation and engagement are realized.

[0078] When the clutch needs to be released by remote control, high-pressure air (or high-pressure oil) is introduced into the third oil passage 41 to push the outer piston 7 to move left, and the inner spring 5 pushes the inner piston 2 and the piston head 3 to move left. The piston head 3 first blocks the first oil passage 14 to prevent the oil from entering the master pump. Figure 2 When the outer piston 7 continues to move left, the oil in the first chamber 11 is compressed and enters the clutch booster cylinder (slave pump) through the second oil passage 15. The booster cylinder pushes the clutch release fork to realize clutch release. At the same time, due to the existence of the inner spring 5, the inner piston 2 and the piston head 3 are pushed to always block the first oil passage 14, and the oil pressure in the first chamber 11 will also push the piston head 3 to further block the first oil passage 14. The higher the oil pressure, the tighter the blockage. Figure 3 When the clutch needs to be engaged, the high-pressure air (or high-pressure oil) in the third oil channel 41 is discharged, and the outer spring 8 pushes the outer piston 7 to move to the right. The high-pressure oil in the power-assisting cylinder returns to the first chamber 11 along the second oil channel 15, and due to the existence of the inner spring 5, the piston head 3 still blocks the first oil channel 14 to prevent oil from entering the clutch master pump. When the outer piston 7 moves to the right to the limit position of the end cover 4, the first limit step 77 drives the inner piston 2 and the piston head 3 to move right, so that the piston head 3 is out of contact with the first oil channel 14 and returns to the initial state.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A remote clutch pump, characterized in that: include: A pump body, the pump body having a mounting cavity and a first oil passage, a second oil passage and a third oil passage communicating with the mounting cavity, the first oil passage communicating with a master pump, the second oil passage communicating with a clutch booster cylinder, and the third oil passage communicating with a high-pressure medium source; A valve core unit is movably arranged in the installation cavity to movably separate the installation cavity into a relatively sealed first chamber and a second chamber, the first chamber is connected to the first oil passage and the second oil passage, the second chamber is connected to the third oil passage, and part of the valve core unit is movably blocked in the first oil passage.

2. The remote clutch pump according to claim 1, characterized in that: The valve core unit includes a first piston assembly and a second piston assembly. The first piston assembly is movably arranged in the second chamber. One end of the second piston assembly passes through the first piston assembly, and the other end is arranged in the first chamber and movably abuts against the first oil channel.

3. The remote clutch pump according to claim 2, characterized in that: The second piston assembly includes an inner spring, an inner piston, a piston head and a plug. The first piston assembly is provided with a through hole extending along the axial direction of the installation cavity. The plug is sealed at one end of the through hole away from the first chamber. One end of the inner piston is limitedly connected to the through hole. A piston head is provided on the other end of the inner piston. The piston head is movably abutted against the first oil channel. The inner spring is arranged in the through hole and is located between the inner piston and the plug.

4. The remote clutch pump according to claim 3, characterized in that: A first limiting step is protruding from the inner wall of one end of the through hole away from the plug, and a first matching boss is protruding from the end of the inner piston extending into the through hole. The first limiting boss is movably abutted against the first matching boss to limit the axial movement of the inner piston.

5. The remote clutch pump according to claim 2, characterized in that: The first piston assembly includes an outer piston and an outer spring. The outer piston has an inner end and an outer end which are arranged radially opposite to each other. The inner end extends into the first chamber and is slidably arranged. The outer end is slidably arranged in the second chamber. The outer spring is sleeved on the outer piston and abuts between the inner wall of the mounting chamber and the outer piston.

6. The remote clutch pump according to claim 5, characterized in that: A second limiting step is provided on the inner wall of the mounting cavity, and the second limiting step extends along the axis of the mounting cavity in a direction away from the first oil channel. The second limiting step cooperates with the outer piston to seal and separate the first chamber and the second chamber. The second limiting step is spaced apart from the inner wall of the second chamber, and a second mating boss is formed between the outer end and the inner end. The second limiting step and the second mating boss are movably abutted to limit the axial movement of the outer piston.

7. The remote clutch pump according to claim 5, characterized in that: At least one sealing ring is provided between the inner end and the inner wall of the first chamber.

8. The remote clutch pump according to claim 5, characterized in that: At least one sealing ring is provided between the outer end and the inner wall of the second chamber.

9. The remote clutch pump according to any one of claims 1 to 8, characterized in that: The pump body comprises a shell and an end cover, the installation cavity is arranged in the shell, an opening communicating with the inner cavity is opened on the shell, the end cover covers the opening, and the third oil passage is opened on the end cover.

10. The remote clutch pump according to claim 9, characterized in that: A side of the end cover facing the installation cavity is recessed outward to form a relief portion, and the relief portion is used to relieve one end of the valve core unit facing the end cover.

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