CN215521730U

CN215521730U - Main pump for clutch booster

Info

Publication number: CN215521730U
Application number: CN202121615362.3U
Authority: CN
Inventors: 李�根; 李启岳
Original assignee: Wenzhou Zhenghua Auto Parts Co ltd
Current assignee: Wenzhou Zhenghua Auto Parts Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-01-14
Anticipated expiration: 2031-07-15

Abstract

The utility model relates to a main pump for a clutch booster, which comprises a pump body, a piston, a connecting rod and a return spring, wherein an oil cavity is arranged in the pump body, the piston is arranged in the oil cavity in a sliding manner, the connecting rod is arranged at one end in the sliding direction of the piston, the return spring is compressed between the piston and the pump body, a first oil inlet and an oil outlet are arranged on the pump body, a second oil inlet is arranged on the pump body, the piston is provided with a first sealing end, the first oil inlet is positioned on the sliding track of the first sealing end, the oil cavity comprises a first cavity and a second cavity which are positioned at two sides of the first sealing end, the second oil inlet is communicated with the first cavity, the oil outlet is communicated with the second cavity, a pressure relief channel for communicating the first cavity with the second cavity is arranged in the piston, and a floating valve for opening and closing the pressure relief channel is arranged on the piston. Adopt above-mentioned scheme, provide one kind can be after the connecting rod loses thrust, the floating valve can communicate first cavity and second cavity fast and the pressure release realizes a clutch booster main pump that resets fast.

Description

Main pump for clutch booster

Technical Field

The utility model relates to a main pump for a clutch booster.

Background

The clutch booster is an intermediate connecting mechanism for connecting the clutch pedal and the clutch, wherein the clutch booster is divided into a main pump connected with the clutch pedal and a slave cylinder connected with the clutch, hydraulic oil which drives the main pump to generate certain hydraulic pressure by stepping on the clutch pedal is pumped into the slave cylinder, and then the slave cylinder is driven to work by the hydraulic oil to drive the clutch through the slave cylinder.

Wherein, the main pump generally includes the pump body, a piston, connecting rod and reset spring, be provided with the oil pocket in the pump body, the piston slides and installs in the oil pocket, the connecting rod sets up in the one end of piston glide direction, make connecting rod and separation and reunion footboard linkage, and slide through connecting rod drive piston, in addition, reset spring compresses between piston and the pump body, make and reset the piston through reset spring, and drive the separation and reunion footboard and reset, in addition, be provided with oil inlet and oil-out on the pump body, through being connected the fuel feeding with oil inlet and hydro-cylinder, and will drive in letting in the branch pump through the hydraulic oil of piston compression through the oil-out.

The problem that current main pump exists lies in: because the clutch pedal needs to cut off the oil inlet and the oil outlet to ensure stable pressure supply to the split pump when in a half-clutch state to a full-clutch state, in addition, the main pump adopts a reset spring mode to realize the reset of the clutch pedal, so that the reset spring not only needs to overcome the sliding resistance of the piston but also needs to overcome the oil pressure in the oil cavity when in the half-clutch state to the full-clutch state, and finally the reset speed of the clutch pedal is slow.

Therefore, how to increase the returning speed to make the vehicle operate more smoothly becomes a problem to be solved by those skilled in the art.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a main pump for a clutch booster, which can realize quick reset by quickly communicating a first cavity and a second cavity through a floating valve to release pressure after a connecting rod loses thrust.

In order to achieve the purpose, the utility model provides the following technical scheme: including the pump body, piston, connecting rod and reset spring, be provided with the oil pocket in the pump body, the piston slides and installs in the oil pocket, the connecting rod sets up in the one end of piston glide direction, and the connecting rod is used for promoting the piston and slides, reset spring compresses between piston and the pump body, and reset spring is used for reseing to the piston, be provided with on the pump body with the first oil inlet and the oil-out of oil pocket intercommunication, its characterized in that: the oil cavity comprises a first cavity and a second cavity, the first cavity and the second cavity are located on two sides of the first sealing end, the second oil inlet is communicated with the first cavity, the oil outlet is communicated with the second cavity, a pressure relief channel for communicating the first cavity with the second cavity is arranged in the piston, and a floating valve for opening and closing the pressure relief channel is arranged on the piston.

The utility model is further configured to: and one end of the pump body, which is positioned in the sliding direction of the piston and faces the connecting rod, is provided with a mounting opening, and the piston is provided with a second sealing end which is positioned on the side of the mounting opening and is in sealed contact with the peripheral wall of the oil cavity.

The utility model is further configured to: the pump body is located the installation department and is provided with the holding ring, and the holding ring is located the motion trail of piston.

The utility model is further configured to: the connecting rod is provided with the thrust end that is used for promoting the piston, the piston is provided with the counterpoint groove that supplies thrust end male towards the connecting rod side, the counterpoint groove is the flaring setting along the connecting rod direction.

The utility model is further configured to: the piston periphery is provided with 2 at least guide rings along the direction of sliding, the outer peripheral shape size of each guide ring and the inner peripheral wall looks adaptation of oil pocket.

The utility model is further configured to: the pressure relief channel is provided with a pressure relief hole communicated with the second cavity, the floating valve comprises a valve cover, a rubber valve core and a valve sleeve, the valve cover is fixedly installed on the piston, the rubber valve core is installed in the valve cover in a sliding mode, the pressure relief hole is located on the motion track of the rubber valve core, the valve sleeve is arranged on the side, facing the pressure relief hole, of the rubber valve core, and the valve sleeve is inserted into the pressure relief hole in a gap mode.

The utility model is further configured to: the pressure release channel is provided with accuse and flows the section, it flows the piece to be provided with in the accuse section, the periphery that the piece was flowed in the accuse and the internal perisporium threaded connection who controls the section, the piece that flows is followed the passageway direction of accuse section and is run through and be provided with accuse discharge hole, accuse discharge hole is hexagonal prism shape.

By adopting the technical scheme, 1, when the connecting rod drives the piston to move and hydraulic oil with certain pressure generated in the first cavity is pumped into the branch pump, the floating valve is subjected to the hydraulic pressure of the hydraulic oil in the first cavity to effectively seal the pressure relief channel, so that oil supply to the second cavity is effectively cut off, and the second cavity is ensured to stably supply pressure to the branch pump through the oil outlet; 2. after the external force is removed by the connecting rod, the piston can reset under the action of the reset spring, and in the resetting process, the second cavity loses the pressure of the piston, so that the floating valve floats to open the pressure relief channel, the first cavity and the second cavity are communicated to ensure the balance pressure in the second cavity, the reset speed is eliminated due to the change of the pressure difference in the second cavity, therefore, the reset spring only needs to overcome the flow resistance of the piston moving in the hydraulic oil, and the reset speed is greatly improved to ensure that the vehicle is operated more smoothly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the present invention;

FIG. 3 is an enlarged view of A in FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 2;

fig. 5 is an enlarged view of B in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-5, the utility model discloses a main pump for a clutch booster, comprising a pump body 1, a piston 2, a connecting rod 3 and a return spring 4, wherein the pump body 1 is internally provided with an oil cavity 11 extending left and right, the piston 2 is slidably arranged in the oil cavity 11 along left and right directions, the connecting rod 3 is arranged at the right side of the piston 2, after the connecting rod 3 is connected with a clutch pedal, the connecting rod 3 is driven to move towards left by stepping on the clutch pedal and drives the piston 2 to move towards left, wherein the return spring 4 is compressed between the piston 2 and the pump body 1, and the return spring 4 is positioned at the left side of the piston 2, so that the piston 2 can move towards left under the return acting force of the return spring 4 to realize return and synchronously drive the clutch pedal to return, in addition, the pump body 1 is provided with a first oil inlet 111, a second oil inlet 112 and an oil outlet 113 which are communicated with the oil cavity 11, and the pump body 1 is provided with an oil receiving head 12, wherein the first oil inlet 111 and the second oil inlet 112 are respectively communicated with the oil receiving head 12 so as to be connected with the cylinder through the oil receiving head 12, and hydraulic oil is injected into the oil chamber 11 through the first oil inlet 111 and the second oil inlet 112, further, the left end of the piston 2 is provided with a first sealing end 21 which is in close contact with the peripheral wall of the oil chamber 11 (a sealing ring is fixedly arranged on the outer periphery of the first sealing end 21 so as to be in close contact with the peripheral wall of the cylinder through the outer periphery of the first sealing ring), and the first oil inlet 111 is located on the sliding track of the first sealing end 21, specifically, when the clutch pedal passes a half clutch state, the first oil inlet 111 is located on the right side of the first sealing end 21, and when the clutch pedal does not pass the half clutch state, the first oil inlet 111 is located on the left side of the first sealing end 21, furthermore, the oil chamber 11 includes a first cavity 114 located on the right side of the first sealing end 21 and a second cavity 115 located on the left side of the first sealing end 21, when the clutch pedal does not cross the half-clutch state, the first oil inlet 111 can feed oil to the second cavity 115, and after the clutch pedal crosses the half-clutch state, the first oil inlet 111 cannot feed oil to the second cavity 115, wherein the second oil inlet 112 is communicated with the first cavity 114, the oil outlet 113 is communicated with the second cavity 115, in addition, a pressure relief channel 22 for communicating the first cavity 114 with the second cavity 115 is arranged in the piston 2, and a floating valve 5 for opening and closing the pressure relief channel 22 is arranged in the first cavity 114 of the piston 2.

Therefore, when the connecting rod 3 drives the piston 2 to move and hydraulic oil with certain pressure generated in the first cavity 114 is pumped into the wheel cylinder, the floating valve 5 is subject to the hydraulic pressure of the hydraulic oil in the first cavity 114 to effectively seal the pressure relief channel 22, so as to effectively cut off the oil supply to the second cavity 115, ensure that the second cavity 115 stably supplies pressure to the split pump through the oil outlet 113, when the external force of the connecting rod 3 is removed, under the action of the return spring 4, the piston 2 will be reset, and during the resetting, since the second chamber 115 loses the pressure of the piston 2, thereby the floating valve 5 floats to open the pressure relief channel 22, the first cavity 114 and the second cavity 115 are communicated to ensure the balance pressure in the second cavity 115, therefore, the influence on the reset speed caused by the change of the pressure difference in the second cavity 115 is eliminated, and the reset spring 4 only needs to overcome the flow resistance of the piston 2 moving in the hydraulic oil, so that the reset speed is greatly improved, and the vehicle operation is smoother.

Wherein, the pressure relief channel 22 in this embodiment is T-shaped, such that one end of the pressure relief channel 22 is provided with a pressure relief hole 221 communicating with the second cavity 115 towards the left, in addition, the floating valve 5 includes a valve cap 51, a rubber valve core 52 and a valve sleeve 53, the valve cap 51 is fixedly mounted at the left end of the piston 2 in a clamping manner, the rubber valve core 52 is disposed in the valve cap 51, in addition, the left end of the valve cap 51 is provided with a through hole penetrating from the left to the right, the left end of the rubber valve core 52 is provided with a guiding section 521 extending into the through hole of the valve cap 51 and in clearance fit, thereby realizing that the rubber valve core 52 is slidably mounted in the valve cap 51 along the left and right direction, and the pressure relief hole 221 is located on the movement track of the rubber valve core 52 towards the right, in addition, the valve sleeve 53 is sleeved at the right side of the rubber valve core 52, and the valve sleeve 53 is inserted in the through hole 521 to realize the second pressure relief guidance, therefore, the floating valve 5 guides the through the guiding section 521 and the through-hole of the valve core 52 and the valve core 53 and the pressure relief hole 221, and the clearance guide of the pressure relief hole 221 The opening and closing of the pressure relief channel 22 are realized, wherein when the second cavity 115 is pushed to the left by the piston 2 to generate higher hydraulic pressure, the rubber valve core 52 is driven to move to the right by the hydraulic pressure generated by the second cavity 115 and abuts against the piston 2 to seal the pressure relief hole 221, and when the piston 2 loses the driving acting force to the left, the acting force to the right of the rubber valve core 52 can be relieved, so that the pressure relief channel 22 is opened, and the quicker resetting is realized.

In addition, the pressure release channel 22 in this embodiment is provided with a flow control section 222 at the right end of the pressure release hole 221, wherein a flow control member 6 is provided in the flow control section 222, the outer periphery of the flow control member 6 is in threaded connection with the inner peripheral wall of the flow control section 222, the flow control member 6 is provided with a flow control hole 61 in a left-right direction in a penetrating manner, and the flow control hole 61 is hexagonal prism-shaped, so that the flow control holes 61 with different sizes can be selected to adjust the pressure release cross-sectional area to adjust the pressure release rate, and the flow control hole is used for adapting and adjusting the reset of the clutch pedal, thereby adapting to different drivers to achieve the optimal driving feeling, in addition, the flow control hole 61 is hexagonal prism-shaped, and the flow control member 6 can be disassembled and assembled through an outer hexagonal tool, and the convenience of disassembly and assembly is realized.

Preferably, the right end of the pump body 1 in this embodiment is provided with a mounting port 13 so that the floating valve 5, the piston 2, and the like can be mounted into the oil chamber 11 through the mounting port 13, and the right end of the piston 2 is provided with a second sealing end 23 which is in close contact with the peripheral wall of the oil chamber 11 (the second sealing end 23 is provided in the same manner as the first sealing end 21), so that oil leakage is prevented by the second sealing end 23.

Preferably, the pump body 1 in this embodiment is provided with the positioning ring 7 at the mounting opening 13, and the positioning ring 7 is located on the movement track of the piston 2, and the right side of the positioning ring 7, which is located in the pump body 1, is clamped with the clamping ring 8, so that the resetting stroke of the piston 2 can be limited by the positioning ring 7, the piston 2 is prevented from being excessively reset, and the stability of the fixed mounting of the positioning ring 7 is ensured by the clamping ring 8.

Wherein, the connecting rod 3 left end in this embodiment is provided with the thrust end 31 that is used for promoting piston 2, and piston 2 right-hand member is offered and is supplied thrust end 31 male counterpoint groove 24, and counterpoint groove 24 is the flaring setting towards the right side, consequently, thrust end 31 is inserted towards the left side and is located to promote piston 2 in counterpoint groove 24 and realize the thrust direction, make thrust improve the smoothness nature more accurately, and the setting of counterpoint groove 24 flaring, make the more smooth and easy counterpoint of thrust end 31 get into counterpoint groove 24, further improve driven smoothness nature.

In addition, the piston 2 in this embodiment is provided with the guide rings 9 on the right sides of the first sealing end 21 and the second sealing end 23, wherein the outer shape and size of each guide ring 9 are matched with the inner circumferential wall of the oil chamber 11, so that the piston 2 is guided and slidably mounted in the oil chamber 11 through the two guide rings 9 arranged left and right, and the smoothness of sliding is improved.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a main pump for clutch booster, includes the pump body, piston, connecting rod and reset spring, be provided with the oil pocket in the pump body, the piston slides and installs in the oil pocket, the connecting rod sets up in the one end of piston glide direction, and the connecting rod is used for promoting the piston and slides, reset spring compresses between the piston and the pump body, and reset spring is used for reseing to the piston, be provided with on the pump body with the first oil inlet and the oil-out of oil pocket intercommunication, its characterized in that: the oil cavity comprises a first cavity and a second cavity, the first cavity and the second cavity are located on two sides of the first sealing end, the second oil inlet is communicated with the first cavity, the oil outlet is communicated with the second cavity, a pressure relief channel for communicating the first cavity with the second cavity is arranged in the piston, and a floating valve for opening and closing the pressure relief channel is arranged on the piston.

2. The main pump for a clutch booster as set forth in claim 1, wherein: and one end of the pump body, which is positioned in the sliding direction of the piston and faces the connecting rod, is provided with a mounting opening, and the piston is provided with a second sealing end which is positioned on the side of the mounting opening and is in sealed contact with the peripheral wall of the oil cavity.

3. The main pump for a clutch booster as set forth in claim 2, wherein: the pump body is located the installation department and is provided with the holding ring, and the holding ring is located the motion trail of piston.

4. A main pump for a clutch booster as set forth in claim 3, wherein: the connecting rod is provided with the thrust end that is used for promoting the piston, the piston is provided with the counterpoint groove that supplies thrust end male towards the connecting rod side, the counterpoint groove is the flaring setting along the connecting rod direction.

5. The main pump for a clutch booster as set forth in claim 1, wherein: the piston periphery is provided with 2 at least guide rings along the direction of sliding, the outer peripheral shape size of each guide ring and the inner peripheral wall looks adaptation of oil pocket.

6. The main pump for a clutch booster as set forth in claim 1, wherein: the pressure relief channel is provided with a pressure relief hole communicated with the second cavity, the floating valve comprises a valve cover, a rubber valve core and a valve sleeve, the valve cover is fixedly installed on the piston, the rubber valve core is installed in the valve cover in a sliding mode, the pressure relief hole is located on the motion track of the rubber valve core, the valve sleeve is arranged on the side, facing the pressure relief hole, of the rubber valve core, and the valve sleeve is inserted into the pressure relief hole in a gap mode.

7. The main pump for a clutch booster as set forth in claim 1, wherein: the pressure release channel is provided with accuse and flows the section, it flows the piece to be provided with in the accuse section, the periphery that the piece was flowed in the accuse and the internal perisporium threaded connection who controls the section, the piece that flows is followed the passageway direction of accuse section and is run through and be provided with accuse discharge hole, accuse discharge hole is hexagonal prism shape.