Clutch master cylinder

Abstract

The clutch master cylinder comprises a pump body, an oil inlet pipe is arranged on the surface of the pump body, a piston assembly is arranged at one end of the pump body in a limited sliding mode, an oil outlet is formed in the other end of the pump body, an auxiliary reset assembly is arranged on the surface, close to the oil inlet pipe, of the pump body, and the auxiliary reset assembly comprises a cavity which is connected with the pump body and internally forms a cavity. A sliding rod is arranged in the cavity in a limited sliding mode, one end of the sliding rod is provided with a pressing cylinder extending out of the cavity, the pressing cylinder is arranged in a pipeline in a limited sliding mode, the other end of the pipeline is arranged in a spring cylinder, the spring cylinder is arranged in an inner cover plate of the oil outlet, a reset push rod is arranged in the spring cylinder in a limited sliding mode, and one end of the reset push rod is connected with a first reset spring. The other end of the reset spring I is extruded at the end part of the inner wall of the spring barrel; according to the oil pump, the auxiliary reset assembly is arranged to assist in pushing the piston to move and reset, and then the pressure of oil pressure on the pump body and the oil outlet is reduced.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of clutches, and in particular to a clutch master cylinder. Background Art

[0002] The clutch master cylinder is the part connected to the clutch pedal and connected to the clutch booster through the oil pipe. Its function is to collect pedal stroke information and release the clutch through the booster. When the driver steps on the clutch pedal, the push rod pushes the master cylinder piston to increase the oil pressure, which enters the slave cylinder through the hose, forcing the slave cylinder pull rod to push the release fork and push the release bearing forward; when the driver releases the clutch pedal, the hydraulic pressure is released, the release fork gradually returns to its original position under the action of the return spring, and the clutch is in the engaged state again.

[0003] Through long-term observation and use, we found that when the traditional clutch master pump brakes, the hydraulic oil needs to flow back. During the reflux process, the piston cannot be reset in time due to long-term wear or failure of the return spring, affecting the normal use of the clutch master pump. At the same time, since the piston cannot be reset in time, it is easy to cause high oil pressure in the oil outlet pipeline and the hydraulic cylinder. Excessive oil pressure can easily cause problems such as cracking of the pipeline and oil leakage at the interface. On this basis, a clutch master pump is proposed. Summary of the invention

[0004] 1. Technical problems to be solved by the invention: The present invention provides a clutch master cylinder to solve the technical problems existing in the above-mentioned background technology.

[0005] 2. Technical solution: In order to achieve the above object, the technical solution of the present invention is: A clutch master pump, comprising a pump body, an oil inlet pipe is provided on the surface of the pump body, a piston assembly is limitedly slidably provided at one end of the pump body, an oil outlet is provided at the other end of the pump body, an auxiliary reset assembly is provided on the surface of the pump body close to the oil inlet pipe, the auxiliary reset assembly comprises a cavity connected to the pump body and forming a cavity inside, a sliding rod is limitedly slidably provided in the cavity, a pressure cylinder extending to the outside of the cavity is provided at one end of the sliding rod, the pressure cylinder is limitedly slidably provided in a pipeline, the other end of the pipeline is arranged in a spring cylinder, the spring cylinder is arranged in an inner cover plate of the oil outlet, a reset push rod is limitedly slidably provided in the spring cylinder, one end of the reset push rod is connected to a reset spring 1, and the other end of the reset spring 1 is pressed and arranged at the end of the inner wall of the spring cylinder; The other end of the slide rod is connected to the second reset spring, and the second reset spring is extruded and arranged on the inner wall of the cavity. The reset push rod assists in pressing the piston to reset when the piston assembly is reset.

[0006] In a preferred embodiment of the present invention, the sliding rod is limitedly slidable at two ends of the radial inner wall of the cavity.

[0007] In a preferred embodiment of the present invention, the pump body and the cavity are connected via a conduit.

[0008] In a preferred embodiment of the present invention, the piston assembly includes a piston slidably disposed in the pump body, one end of the piston is provided with a push rod extending to the outside of the pump body, a return spring three is provided between the piston and the inner wall of the pump body near one end of the push rod, and the return push rod assists in pressing the piston to reset when the piston assembly is reset.

[0009] In a preferred embodiment of the present invention, the piston assembly further comprises a sealing unit disposed on the surface of the piston, the sealing unit comprising friction blocks disposed at both ends of the piston, the friction blocks being connected to a movable rod disposed in the piston, and the ends of the two groups of movable rods are respectively hinged with pressure rods; A sealing rubber ring is arranged on the surface of the piston, a push piece is arranged inside the sealing rubber ring, and two groups of pressure rods are connected to the push piece.

[0010] In a preferred embodiment of the present invention, the push piece is arranged at the center of the outer end surface of the piston.

[0011] In a preferred embodiment of the present invention, it also includes an outer cover plate adapted to be arranged with the inner cover plate of the oil outlet.

[0012] In a preferred embodiment of the present invention, fixing plates are installed at both ends of the pump body, and a plurality of mounting holes are provided on the fixing plates.

[0013] 3. Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The clutch master pump provided by the present invention has a novel structure. When braking is required, the piston assembly is pushed. At this time, the oil pressure inside the pump body increases. The oil pressure entering the cavity will cause the sliding rod to move to the right, and the pressure cylinder will squeeze the pipeline. The air generated by the squeezing is transported to the spring cylinder through the pipeline, thereby pushing the reset push rod to compress the reset spring 1, so that the reset push rod will not block the oil pressure operation of the piston assembly; when the hydraulic oil needs to flow back at the end of braking, the oil pressure inside the oil inlet pipe and the cavity is reduced, and the reset spring 2 drives the pressure cylinder to retract, and then the pressure inside the spring cylinder is reduced. The reset spring 1 will rebound and push the reset push rod to move to the left, thereby assisting in pushing the piston to move and reset, thereby reducing the pressure of the oil pressure on the pump body and the oil outlet. This arrangement can increase the service life and sealing effect of the entire clutch master pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the auxiliary reset assembly of the present invention; Figure 3For the present invention Figure 2 A magnified schematic diagram of part A; Figure 4 It is a schematic diagram of the structure of the piston assembly of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of part B in the middle.

[0015] Reference numerals: 1- pump body; 2- oil inlet pipe; 3- piston assembly; 31- piston; 32- push rod; 33- reset spring three; 34- sealing unit; 341- friction block; 342- movable rod; 343- pressure rod; 344- sealing rubber ring; 345- push plate; 4- oil outlet; 5- auxiliary reset assembly; 51- cavity; 52- slide rod; 53- pressure cylinder; 54- pipeline; 55- spring cylinder; 56- reset push rod; 57- reset spring one; 58- reset spring two; 6- guide tube; 7- outer cover plate; 8- fixed plate. DETAILED DESCRIPTION

[0016] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0017] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", etc. 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 it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] It should be noted that the structures not introduced in the present invention adopt the existing technology because they do not involve the design points and improvement directions of the present invention. At the same time, the content of the above background technology belongs to the technical cognition scope of the inventor. Since the technical content in this field is vast and too complicated, the above content of this application does not necessarily constitute the prior art. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] Reference Figure 1-5The present invention provides a clutch master pump, comprising a pump body 1, wherein an oil inlet pipe 2 is provided on the surface of the pump body 1, a piston assembly 3 is limitedly slidably provided at one end of the pump body 1, an oil outlet 4 is provided at the other end of the pump body 1, and an auxiliary reset assembly 5 is provided on the surface of the pump body 1 near the oil inlet pipe 2, wherein the auxiliary reset assembly 5 comprises a cavity 51 connected to the pump body 1 and forming a cavity inside, a slide rod 52 is limitedly slidably provided in the cavity 51, a pressure cylinder 53 extending to the outside of the cavity 51 is provided at one end of the slide rod 52, the pressure cylinder 53 is limitedly slidably provided in a pipeline 54, the other end of the pipeline 54 is arranged in a spring cylinder 55, the spring cylinder 55 is arranged in an inner cover plate of the oil outlet 4, and a reset push rod 56 is limitedly slidably provided in the spring cylinder 55, one end of the reset push rod 56 is connected to a reset spring 57, and the other end of the reset spring 57 is pressed and arranged at the end of the inner wall of the spring cylinder 55; The pressure cylinder 53 is arranged in the radial direction of the cavity 51, and the cavity 51 and the pipe 54 are sealed; The other end of the slide rod 52 is connected to the second reset spring 58 , and the second reset spring 58 is extruded and arranged on the inner wall of the cavity 51 . The reset push rod 56 assists in pressing the piston 31 to reset when the piston assembly 3 is reset.

[0020] When braking is required, the piston assembly 3 is pushed. At this time, the oil pressure inside the pump body 1 increases. The oil pressure enters the cavity 51, which causes the slide bar 52 to move rightward. The pressure cylinder 53 squeezes the pipe 54. The air generated by the squeezing is transported to the spring cylinder 55 through the pipe 54, and then the reset push rod 56 is pushed to compress the reset spring 1 57, so that the reset push rod 56 will not block the rightward oil pressing operation of the piston assembly 3. When the hydraulic oil needs to flow back at the end of braking, the oil pressure inside the oil inlet pipe 4 and the cavity 51 is reduced, and the return spring 2 58 drives the pressure cylinder 53 to retract, thereby reducing the internal pressure of the spring cylinder 55, and the return spring 1 57 will rebound and push the return push rod 56 to move to the left, thereby assisting in pushing the piston 31 to move and reset, thereby reducing the oil pressure on the pump body 1 and the oil outlet 4. This setting can increase the service life and sealing effect of the entire clutch master pump.

[0021] In a preferred embodiment, the slide rod 52 is limited to slide at two ends of the radial inner wall of the cavity 51 , and sliding grooves for limiting the sliding of the slide rod 52 are provided on the radial end walls of the cavity 51 .

[0022] In a preferred embodiment, the pump body 1 is connected to the cavity 51 via a conduit 6, so as to facilitate the introduction of the oil in the pump body 1 into the cavity 51 and buffer the excessive oil pressure in the early and late stages.

[0023] In a preferred embodiment, the piston assembly 3 includes a piston 31 slidably disposed in the pump body 1, and one end of the piston 31 is provided with a push rod 32 extending to the outside of the pump body 1, and a reset spring 33 is provided between the piston 31 and the inner wall of the pump body 1 near one end of the push rod 32, and the reset push rod 56 assists in pressing the piston 31 to reset when the piston assembly 3 is reset.

[0024] In this embodiment, when braking is finished, the piston 31 is driven to reset by the rebound action of the return spring 33 .

[0025] In a preferred embodiment, the piston assembly 3 further comprises a sealing unit 34 disposed on the surface of the piston 31, wherein the sealing unit 34 comprises friction blocks 341 disposed at both ends of the piston 31, wherein the friction blocks 341 are connected to movable rods 342 disposed in the piston 31, and the ends of the two sets of movable rods 342 are respectively hinged with pressure rods 343; The surface of the piston 31 is provided with a sealing rubber ring 344 , the interior of the sealing rubber ring 344 is provided with a push piece 345 , and the two groups of pressure rods 343 are connected to the push piece 345 .

[0026] When the piston assembly 3 is not working, the pressure between the sealing rubber ring 344 and the inner wall of the pump body 1 is relatively small, which relatively increases the service life of the piston assembly 3. When working, the friction block 341, the movable rod 342, the pressure rod 343, the push piece 345 and the sealing rubber ring 344 can cooperate to increase the sealing performance of the piston assembly 3 when working, and can better cope with the working environment of high oil pressure in the pump body 1; When the piston assembly 3 is working, the friction block 341 pushes the movable rod 342 and the pressure rod 343, so that the push piece 345 squeezes the sealing rubber ring 344, thereby increasing the sealing performance of the piston assembly 3 when pressing and returning oil.

[0027] In this embodiment, the push piece 345 is arranged at the center of the outer end surface of the piston 1. The push piece 345 is movably connected to the corresponding two groups of pressure rods 343, which increases the relative movement space between the push piece 345 and the sealing rubber ring 344 and improves the sealing effect.

[0028] The present embodiment further comprises an outer cover plate 7 adapted to be arranged with the inner cover plate of the oil outlet 4. The inner cover plate and the outer cover plate 7 are arranged with corresponding holes and are fixed by bolts, thereby ensuring the structural stability of the oil outlet 4.

[0029] In this embodiment, fixing plates 8 are installed at both ends of the pump body 1. The fixing plates 8 are provided with a plurality of mounting holes. The fixing plates 8 facilitate the installation and fixing of the clutch master cylinder.

[0030] The clutch master cylinder provided by the present invention pushes the piston assembly 3 during the braking process. At this time, the oil pressure inside the pump body 1 increases. The oil pressure entering the cavity 51 will cause the slide rod 52 to move to the right, and the pressure cylinder 53 will squeeze the pipe 54. The air generated by the squeezing is transported to the spring cylinder 55 through the pipe 54, thereby pushing the reset push rod 56 to compress the reset spring 57, so that the reset push rod 56 will not block the oil pressure operation of the piston assembly 3. Specifically, the piston assembly 3 will move toward the oil outlet 4. During the oil delivery process of the piston assembly 3, the friction block 341 in the forward direction of the piston 31 will push the movable rod 342 and the pressure rod 343 through the friction with the inner wall of the pump body 1, so that the push piece 345 squeezes the sealing rubber ring 344, which can increase the oil pressure. In order to improve the sealing performance of the piston 31 during oil delivery and oil return, the design of multiple friction blocks 341, movable rods 342, pressure rods 343 and push plates 345 enables sealing operations to be performed in multiple directions. At this time, the oil will flow from the inside of the pump body 1 through the oil outlet 4 to the slave cylinder for braking. At the end of braking, the hydraulic oil needs to flow back to the oil inlet pipe 2. At this time, the oil pressure inside the oil inlet pipe 2 and the cavity 51 is reduced, and the return spring 2 58 drives the pressure cylinder to retract, thereby reducing the internal pressure of the spring cylinder 55, and the return spring 1 57 will rebound and push the return push rod 56 to move to the left, thereby assisting in pushing the piston 31 to move and reset, thereby reducing the pressure of the oil pressure on the pump body 1 and the oil outlet 4. This setting can increase the service life and sealing effect of the entire clutch master pump.

[0031] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A clutch master cylinder, comprising a pump body (1), characterized in that: An oil inlet pipe (2) is provided on the surface of the pump body (1), a piston assembly (3) is limitedly slidably disposed at one end of the pump body (1), an oil outlet (4) is provided at the other end of the pump body (1), an auxiliary reset assembly (5) is provided on the surface of the pump body (1) near the oil inlet pipe (2), the auxiliary reset assembly (5) comprising a cavity (51) connected to the pump body (1) and forming a cavity therein, a slide rod (52) is limitedly slidably disposed in the cavity (51), and one end of the slide rod (52) is provided with a piston assembly (3) extending into the cavity (51). 51) an external pressure cylinder (53), the pressure cylinder (53) is limitedly slid in the pipe (54), the other end of the pipe (54) is arranged in the spring cylinder (55), the spring cylinder (55) is arranged in the inner cover plate of the oil outlet (4), and a reset push rod (56) is limitedly slid in the spring cylinder (55), one end of the reset push rod (56) is connected to the reset spring 1 (57), and the other end of the reset spring 1 (57) is pressed and arranged on the inner wall end of the spring cylinder (55); The other end of the slide rod (52) is connected to a second return spring (58), and the second return spring (58) is extruded and arranged on the inner wall of the cavity (51). When the piston assembly (3) is reset, the return push rod (56) assists in pressing the piston (31) to reset.

2. A clutch master cylinder according to claim 1, characterized in that: The sliding rod (52) is limitedly slidable at two ends of the radial inner wall of the cavity (51).

3. A clutch master cylinder according to claim 1, characterized in that: The pump body (1) and the cavity (51) are connected via a conduit (6).

4. A clutch master cylinder according to claim 1, characterized in that: The piston assembly (3) comprises a piston (31) slidably disposed in the pump body (1); one end of the piston (31) is provided with a push rod (32) extending to the outside of the pump body (1); and a return spring (33) is provided between the piston (31) and an inner wall of the pump body (1) near one end of the push rod (32).

5. A clutch master cylinder according to claim 4, characterized in that: The piston assembly (3) further comprises a sealing unit (34) arranged on the surface of the piston (31), the sealing unit (34) comprising friction blocks (341) arranged at both ends of the piston (31), the friction blocks (341) being connected to movable rods (342) arranged in the piston (31), and the ends of the two groups of movable rods (342) are respectively hinged with pressure rods (343); A sealing rubber ring (344) is provided on the surface of the piston (31), a push piece (345) is provided inside the sealing rubber ring (344), and the two groups of pressure rods (343) are connected to the push piece (345).

6. A clutch master cylinder according to claim 5, characterized in that: The push piece (345) is arranged at the center position of the outer end surface of the piston (31).

7. A clutch master cylinder according to claim 1, characterized in that: It also includes an outer cover plate (7) adapted to be arranged with the inner cover plate of the oil outlet (4).

8. A clutch master cylinder according to claim 1, characterized in that: Both ends of the pump body (1) are mounted with fixing plates (8), and the fixing plates (8) are provided with a plurality of mounting holes.

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