CN211715309U - Compensation hole type master pump with central valve - Google Patents
Compensation hole type master pump with central valve Download PDFInfo
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- CN211715309U CN211715309U CN202020241387.0U CN202020241387U CN211715309U CN 211715309 U CN211715309 U CN 211715309U CN 202020241387 U CN202020241387 U CN 202020241387U CN 211715309 U CN211715309 U CN 211715309U
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Abstract
A compensating hole type master pump with a central valve. The main problem of current compensation cellular type master cylinder structure oil filling speed slow, the oil feed requirement that can't satisfy big discharge capacity product of solving. The method is characterized in that: a central groove is formed in the center of the front end of the piston, an oil inlet groove is annularly formed in the side wall of the piston, and a plurality of through holes communicating the central groove with the oil inlet groove are uniformly formed in the piston in the circumferential direction; an oil inlet is formed in the side wall of the pump body, and an oil inlet hole is formed between the oil inlet and the oil inlet groove; a diaphragm type central valve is arranged at the central groove. The diaphragm type central valve and the corresponding oil supplementing channel structure are arranged on the piston, so that the oil inlet speed is further increased, the piston returns faster, the oil inlet requirement of large-displacement products can be met, and the purpose of quickly and secondarily establishing brake hydraulic pressure can be achieved.
Description
Technical Field
The utility model relates to a hydraulic pressure master cylinder, concretely relates to take compensation cellular type master cylinder of center valve.
Background
The clutch master cylinder and the brake master cylinder are common structures of hydraulic systems of automobiles or engineering machinery, and are devices for converting force and displacement transmitted by pedal movement into volume of hydraulic oil to be discharged through piston movement and establishing certain hydraulic output through compression of the hydraulic oil.
If chinese utility model patent (CN 202188043U) discloses a compensation cellular type hydraulic clutch master cylinder, all there is the through-hole that distributes on its piston and the terminal surface of main leather collar, after accomplishing the braking and withdrawing the push rod power, the piston return produces the vacuum, supply the brake fluid in the liquid chamber to flow into the braking intracavity through the through-hole on the piston and the clearance of piston and pump body through main leather collar periphery, but main leather collar itself need bear the high pressure at the action in-process, its lip thickness often can be than thicker, receive its size restriction of itself simultaneously, consequently, lead to it at this oil supplementation in-process, the lip deformation of main leather collar is smaller, the oil supplementing passageway that corresponds the formation is also smaller, the oil supplementing speed is slow, lead to power not enough, can't satisfy the oil feed requirement of big discharge capacity product.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of background art, the utility model provides a take compensation cellular type master cylinder of central valve solves current compensation cellular type master cylinder structure and mends that the oil speed is slow, can't satisfy the problem of the oil feed requirement of big discharge capacity product.
The utility model discloses the technical scheme who adopts: a compensation hole type master cylinder with a central valve comprises a pump body, a piston and a push rod, wherein an oil cavity is formed in the pump body; a central groove is formed in the center of the front end of the piston, an oil inlet groove is annularly formed in the side wall of the piston, and a plurality of through holes communicating the central groove with the oil inlet groove are uniformly formed in the piston in the circumferential direction; an oil inlet is formed in the side wall of the pump body, and an oil inlet hole is formed between the oil inlet and the oil inlet groove; and a diaphragm type central valve is arranged at the central groove.
The piston pump further comprises a spring and a spring seat, wherein the spring seat is installed at the front end of the piston, one end of the spring is abutted against the pump body, and the other end of the spring is abutted against the spring seat.
The diaphragm type central valve comprises a main body and a sealing diaphragm arranged on the outer side of the main body, the front end of the main body is abutted against a spring seat, and the rear end face of the sealing diaphragm inclines backwards and can be attached to the piston in a sealing mode.
The side wall of the front end of the central groove is obliquely arranged and is of a V-shaped structure, and the rear end face of the sealing membrane is in sealing fit with the side wall of the front end of the central groove.
The piston is also provided with a main leather cup outside, the main leather cup is positioned on the front side of the oil inlet groove, and the main leather cup is in sealing fit with the inner wall of the oil cavity.
And an auxiliary leather cup is arranged outside the piston and is positioned at the rear side of the oil inlet groove, and the auxiliary leather cup is in sealing fit with the inner wall of the oil cavity.
And a compensation hole is formed between the oil inlet and the oil cavity and is positioned on the front side of the oil inlet.
The utility model has the advantages that: scheme more than adopting sets up diaphragm formula center valve and the oily access structure of benefit that corresponds on the piston to further improve oil feed speed, the piston return is faster, can satisfy the big product oil feed requirement of discharging and can establish the purpose of brake fluid pressure fast the secondary.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a point a in fig. 1.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1-2, a compensation hole type master cylinder with a center valve comprises a pump body 1, a piston 2 and a push rod 3.
An oil cavity with an opening at the rear end is formed in the pump body 1, an oil outlet 14 is formed in the front end of the oil cavity, and when the piston 2 pushes in, hydraulic oil in the oil cavity can be pushed out from the oil outlet 14; an oil inlet 11 is formed in the side wall of the pump body 1, an oil inlet joint is arranged at the position of the oil inlet 11 and can be connected with an oil inlet device, and an oil inlet hole 12 is formed between the oil inlet 1 and an oil cavity and used for supplementing hydraulic oil.
The piston 2 extends into the oil cavity from an opening at the rear end of the oil cavity, and the piston 2 is matched with the oil cavity and is in sealing sliding fit with the oil cavity. The rear end of the piston 2 is connected with one end of a push rod 3, and the piston 2 can be pushed to move back and forth through the push rod 3.
The front end of the piston 2 is provided with a spring 5 and a spring seat 6, the spring seat is arranged at the front end of the piston 2, one end of the spring 5 abuts against the pump body 1, the other end of the spring abuts against the spring seat 6, and after the thrust of the push rod 3 is removed, the piston 2 can reset to an initial state under the action of the spring 5.
The side wall of the piston 2 is annularly provided with an oil inlet groove 22, the oil cavity of the piston 2 is at least divided into a pressure cavity and an oil inlet cavity, the pressure cavity is a cavity at the front side of the piston 2, the oil inlet cavity is a cavity at the position of the oil inlet groove 22, an outlet of the oil inlet hole 12 corresponds to the oil inlet groove 22, hydraulic oil can be continuously supplemented to the oil inlet cavity through the oil inlet 11 and the oil inlet hole 12, and sufficient hydraulic oil in the oil inlet cavity is guaranteed.
The center of the front end of the piston 2 is provided with a central groove 21, a plurality of through holes 23 for communicating the central groove 21 with an oil inlet groove 22 are evenly distributed in the circumferential direction of the piston 2, the pressure cavity and the oil inlet cavity can be communicated with each other through the central groove 21 and the through holes 23, and a diaphragm type central valve 4 capable of sealing the central groove 21 is arranged at the position of the central groove 21.
The diaphragm type central valve 4 comprises a main body 4 and a sealing diaphragm 42 arranged on the outer side of the main body 41, the front end of the main body 41 is abutted against a spring seat 6, and the rear end face of the sealing diaphragm 42 is inclined backwards and can be in sealing fit with the piston 2. Furthermore, the front end side wall of the central groove 21 is obliquely arranged and is in a V-shaped structure, and the rear end face of the sealing membrane 42 can be better sealed and attached with the front end side wall of the central groove 21.
The working process of the master pump is as follows:
in an initial state, the pressure cavity and the oil inlet cavity are filled with hydraulic oil, and the pressure in the oil cavity is kept balanced;
when the hydraulic oil pump works, the push rod 3 drives the piston 2 to move forwards, and hydraulic oil in the pressure cavity is pushed out from the oil outlet 14 under the action of the piston to complete hydraulic action;
after the action is completed, the driving force of the push rod 3 is cancelled, the piston 2 resets under the action of the spring 5, vacuum can be generated in the resetting process, the vacuum can suck the sealing diaphragm 42 of the diaphragm type central valve 4, hydraulic oil in the oil inlet cavity flows into the pressure cavity through the through hole 23 and the central groove 21, and quick oil supplement of the pressure cavity is realized.
Scheme more than adopting, set up diaphragm formula center valve 4 and through-hole 23 on piston 2, the relative leather cup of sealed diaphragm 42 thickness of diaphragm formula center valve 4 can be thinner, and radial extension size is also bigger moreover, and when producing the vacuum, the oil supplementing channel that diaphragm formula center valve 4 was opened also can be bigger, and consequently the oil feed speed is faster, and the piston return is faster, can satisfy the big volume of discharging product oil feed requirement and can establish the purpose of brake fluid pressure fast the secondary.
In addition, the piston 2 is matched with the inner wall of the oil cavity in a sealing sliding mode through a leather cup, the piston 2 comprises a main leather cup 7 located on the front side of the oil inlet groove 22 and an auxiliary leather cup 8 located on the rear side of the oil inlet groove 22, when the piston 2 is reset to generate vacuum after actions are completed, the main leather cup 7 can be deformed, hydraulic oil in the oil inlet cavity can enter the pressure cavity through a gap between the piston 2 and the inner wall of the oil cavity and then enter the pressure cavity through the main leather cup, and the oil inlet speed of the piston 2 is further improved.
Furthermore, a compensation hole 13 is formed between the oil inlet 11 and the oil cavity, the compensation hole 13 is located on the front side of the oil inlet 12, the position of the main leather cup 7 is located on the rear side of the compensation hole 13 in the initial state of the piston, and hydraulic oil can be further supplemented through the compensation hole 13, so that further supplement of hydraulic oil in the oil cavity is ensured, and balance is established.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.
Claims (7)
1. A compensation hole type master cylinder with a central valve comprises a pump body (1) formed with an oil cavity, a piston (2) arranged in the oil cavity and capable of sliding back and forth along the oil cavity, and a push rod (3) connected with the rear end of the piston (2) and capable of pushing the piston to slide in the oil cavity; the method is characterized in that: a central groove (21) is formed in the center of the front end of the piston (2), an oil inlet groove (22) is formed in the side wall of the piston (2) in a surrounding mode, and a plurality of through holes (23) for communicating the central groove (21) with the oil inlet groove (22) are uniformly formed in the piston (2) in the circumferential direction; an oil inlet (11) is formed in the side wall of the pump body (1), and an oil inlet hole (12) is formed between the oil inlet (11) and the oil inlet groove (22); and a diaphragm type central valve (4) is arranged at the central groove (21).
2. A compensated port master pump with a center valve as defined in claim 1 wherein: the pump is characterized by further comprising a spring (5) and a spring seat (6), wherein the spring seat (6) is installed at the front end of the piston (2), one end of the spring (5) abuts against the pump body (1), and the other end of the spring abuts against the spring seat (6).
3. A compensated port master pump with a center valve as defined in claim 2 wherein: the diaphragm type central valve (4) comprises a main body (41) and a sealing diaphragm (42) arranged on the outer side of the main body (41), the front end of the main body (41) is abutted to a spring seat (6), and the rear end face of the sealing diaphragm (42) inclines backwards and can be attached to the piston (2) in a sealing mode.
4. A compensated port master pump with a center valve as defined in claim 3 wherein: the side wall of the front end of the central groove (21) is obliquely arranged and is of a V-shaped structure, and the rear end face of the sealing membrane (42) is in sealing fit with the side wall of the front end of the central groove (21).
5. A compensated port master pump with a center valve as defined in claim 1 wherein: the piston (2) is also provided with a main leather cup (7) outside, the main leather cup (7) is positioned on the front side of the oil inlet groove (22), and the main leather cup (7) is in sealing fit with the inner wall of the oil cavity.
6. The compensated port master pump with center valve as claimed in claim 5, wherein: the piston (2) is also provided with an auxiliary leather cup (8) outside, the auxiliary leather cup (8) is positioned on the rear side of the oil inlet groove (22), and the auxiliary leather cup (8) is in sealing fit with the inner wall of the oil cavity.
7. A compensated port master pump with a center valve as defined in claim 1 wherein: and a compensation hole (13) is formed between the oil inlet (11) and the oil cavity, and the compensation hole (13) is positioned on the front side of the oil inlet hole (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020241387.0U CN211715309U (en) | 2020-03-03 | 2020-03-03 | Compensation hole type master pump with central valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020241387.0U CN211715309U (en) | 2020-03-03 | 2020-03-03 | Compensation hole type master pump with central valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211715309U true CN211715309U (en) | 2020-10-20 |
Family
ID=73396643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020241387.0U Active CN211715309U (en) | 2020-03-03 | 2020-03-03 | Compensation hole type master pump with central valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211715309U (en) |
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2020
- 2020-03-03 CN CN202020241387.0U patent/CN211715309U/en active Active
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