CN205859002U - Clutch master cylinder - Google Patents
Clutch master cylinder Download PDFInfo
- Publication number
- CN205859002U CN205859002U CN201620510668.5U CN201620510668U CN205859002U CN 205859002 U CN205859002 U CN 205859002U CN 201620510668 U CN201620510668 U CN 201620510668U CN 205859002 U CN205859002 U CN 205859002U
- Authority
- CN
- China
- Prior art keywords
- piston
- cavity
- master cylinder
- pump housing
- centre valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 210000003709 heart valve Anatomy 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Landscapes
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
A clutch master cylinder comprises a pump body, a piston, a central valve and a return spring, wherein the piston, the central valve and the return spring are axially and sequentially arranged in a cavity of the pump body; the piston is arranged in a cavity of the pump body in a sliding mode, and the cavity of the pump body is divided into a working cavity and a hydraulic cavity by a first sealing ring and a second sealing ring which are sleeved on the piston; the annular groove on the side wall of the piston and the inner wall of the body 1 form a hydraulic cavity, the hydraulic cavity is communicated with the oil can through the oil inlet hole, and the pressure cavity is communicated with the working cavity through an oil hole arranged in the piston and an oil passing channel of the central valve; the central valve and the return spring 8 are positioned in a working cavity, and the working cavity is communicated with the clutch booster through a pipeline; the piston is sleeved with two supporting rings with outer ring side walls in sliding fit with the inner wall of the pump body. The utility model discloses can effectively improve the piston and easily take place the condition of eccentric wear with the pump body in the motion process, effectively prolong the life of clutch master cylinder, promote the travelling comfort that the clutch master cylinder was controlled.
Description
Technical field
This utility model relates to a kind of clutch master cylinder, particularly relates to the clutch master cylinder of a kind of band supporting ring structure, belongs to
In automobile clutch technical field.
Background technology
Clutch master cylinder is arranged between clutch foot plate and clutch booster, and its effect is by gathering pedal
Travel information controls the oil inlet quantity in booster, air inflow, and then controls locking and the separation of clutch.
Existing clutch master cylinder is as it is shown in figure 1, include the pump housing 1 ' and be placed in the centre valve 2 ' in the pump housing 1 ' cavity, live
Plug 5 ', return spring 8 ', the cavity of the pump housing 1 ' is split by the first sealing ring 3 ' being sheathed on piston 5 ' and the second sealing ring 6 '
Becoming working chamber 7 ' and hydraulic cavities 10 ', working chamber 7 ' is connected with clutch booster by pipeline, and hydraulic cavities 10 ' passes through overflow
Hole 4 ' connects with oil can, is provided with for piston 5 ' is carried out spacing stop screw 9 ' in the cavity of the pump housing 1 '.When stepping on clutch
During device pedal, the push rod fixing with pedal promotes piston 5 ' motion, and return spring 8 ' is compressed, and that treats in the pump housing 1 ' cavity is axial
After idle stroke is completely eliminated, centre valve 2 ' cuts out, and sets up oil pressure in working chamber 7 ', and (return spring 8 ' is continued to continue pedal
Continuous compression), the fluid in working chamber 7 ' is flowed in clutch booster oil cylinder by pipeline；When releasing the clutch pedal,
Piston 5 ' is return under the oil pressure effect with return spring power 8 ', until centre valve 2 ' is opened, fluid passes through piston 5 ' and center
Gap between valve 2 ' and the oil duct on centre valve 2 ' are back to oil can.
Above-mentioned clutch master cylinder and Chinese utility model patent " Authorization Notice No.: CN 202719043 U, Granted publication
Day: on 02 06th, 2013, entitled: clutch master cylinder " principle the most similar, existing structure has following defects that a, limit
Position screw and piston cutting edge can produce iron filings because of friction, and iron filings can cause the breakage of rubber seal in master cylinder；B, piston are at pump
Internal unbraced structure, piston in the course of the work can because of by unbalanced radial force with pump housing generation eccentric wear, cause piston
Sealing member, pump housing premature failure.
Summary of the invention
The purpose of this utility model is for existing clutch master cylinder sealing member broken invalid and the problem of piston eccentric wear, carries
Having supplied a kind of clutch master cylinder, it can not only solve abrasive dust and cause the problem of sealing member broken invalid, also can significantly improve work
Plug eccentric wear problem, reduces oil circuit air inlet risk, improves the service life of clutch master cylinder.
For achieving the above object, technical solution of the present utility model is:
A kind of clutch master cylinder, including the pump housing and is axially sequentially placed in the piston in pump housing cavity, centre valve, return
Spring；Described piston is slidably arranged in the cavity of the pump housing, the first sealing ring that the cavity of the described pump housing is sheathed on piston
It is divided into working chamber and hydraulic cavities with the second sealing ring；Annular groove on described piston side wall forms hydraulic pressure with the inwall of the pump housing
Chamber, described hydraulic cavities is connected with oil can by fuel feed hole, and institute's hydraulic cavities is by being arranged at the oilhole of internal piston and centre valve
Oil duct is connected with working chamber；Described centre valve and return spring are positioned at working chamber, described working chamber by pipeline with from
Clutch booster is connected；The support ring that the inwall of two outer ring sidewalls and the pump housing is slidably matched it is arranged with on described piston.
Preferably, two described support rings are placed in head and the afterbody of piston respectively.
Preferably, described support ring is fabricated by by wear resistant nylon material.
Preferably, described centre valve is resisted against at the oilhole of piston crown end face by return spring, described piston tail
End face on pad be provided with circlip.
Preferably, between described centre valve and piston, pad is provided with flexible member；When pushes pedals makes piston compress return bullet
During spring, this flexible member is compressed, the compensation bore closure between piston and centre valve, and centre valve cuts out；Trample when pedal removes
Power, when return spring recovers length, this flexible member resilience extends, and the compensation hole between piston and centre valve is opened, centre valve
Open.
Compared with prior art, the beneficial effects of the utility model are:
1. this utility model is respectively arranged with support ring at head and the afterbody of piston rod, the sidewall of this support ring outer ring with
Pump housing inwall is slidably matched, and piston can effectively be positioned by this support ring, can be effectively improved piston easy in motor process
With pump housing generation eccentric wear, piston seal, the situation of pump housing premature failure, effectively extend the service life of clutch master cylinder；With
Time, the design of support ring also efficiently solves the steerable system Block failure caused because of eccentric wear problem, improves clutch total
The comfortableness that pump is handled；
2. the centre valve in this utility model and piston are by being resisted against on centre valve return spring and being resisted against piston tail part
Circlip on end surface achieves the arrangement location in pump housing cavity, eliminates the design of stop screw, not only has
Simple in construction, the advantage that manufacture maintenance cost is low, also avoid stop screw with piston because friction produces iron filings simultaneously, causes living
The defect that plug sealing member is damaged, effectively extends the service life of sealing member, has prominent practicality.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing clutch master cylinder；
Fig. 2 is structural representation of the present utility model；
In Fig. 1: the pump housing 1 ', centre valve 2 ', the first sealing ring 3 ', spout hole 4 ', piston 5 ', sealing ring 6 ', working chamber 7 ',
Return spring 8 ', stop screw 9 ', hydraulic cavities 10 '；
In Fig. 2: the pump housing 1, centre valve 2, compensate, 3, fuel feed hole 4, oil can 5, support ring 6, working chamber 7, return spring 8, the
One sealing ring 9, hydraulic cavities 10, piston 11, the second sealing ring 12, circlip 13.
Detailed description of the invention
Illustrate with specific embodiment, this utility model to be described in further detail below in conjunction with accompanying drawing.
See Fig. 2, a kind of clutch master cylinder, including the pump housing 1 and be axially sequentially placed in the piston in the pump housing 1 cavity
11, centre valve 2, return spring 8；Piston 11 is slidably arranged in the cavity of the pump housing 1, and the cavity of the pump housing 1 is sheathed on piston 11
On the first sealing ring 9 and the second sealing ring 12 be divided into working chamber 7 and hydraulic cavities 10；Annular groove on piston 11 sidewall with
The inwall of the pump housing 1 forms hydraulic cavities 10, and hydraulic cavities 10 is connected with oil can 5 by fuel feed hole 4, and hydraulic cavities 10 is by being arranged at piston
Oilhole within 11 is connected with working chamber 7 with the oil duct of centre valve 2；Centre valve 2 and return spring 8 are positioned at working chamber 7, work
Make chamber 7 to be connected with clutch booster by pipeline；The inwall slip of two outer ring sidewalls and the pump housing 1 it is arranged with on piston 11
The support ring 6 coordinated.
Preferably technical scheme, two support rings 6 are placed in head and the afterbody of piston 11 respectively.
Preferably technical scheme, support ring 6 is fabricated by by wear resistant nylon material.
Preferably technical scheme, centre valve 2 is resisted against at the oilhole of piston 11 head end by return spring 8, piston
Padding on the end face of 11 afterbodys and be provided with circlip 13, centre valve 2 and piston 11 are closely supported by return spring 8 and circlip 13
It is close together.
Preferably technical scheme, between centre valve 2 and piston 11, pad is provided with flexible member；When pushes pedals makes piston 11 press
During contracting return spring 8, this flexible member is compressed, and the compensation hole 3 between piston 11 and centre valve 2 closes up, and centre valve 2 cuts out；
When pedal removes pedal force, and return spring 8 recovers length, this flexible member resilience extends, between piston 11 and centre valve 2
Compensating hole 3 to open, centre valve 2 is opened.
Principle of the present utility model: under free state, oil can 5 by the oilhole in fuel feed hole 4, hydraulic cavities 10, piston, in
Oilhole and the compensation hole 3 of heart valve are connected with working chamber 7；Under original state (when pedal is not applied to piston 11 pressure),
First sealing ring 9 and the dead stroke that axial distance is clutch master cylinder piston (general 0.5 millimeter～1 milli that compensate between hole 3
Rice), push rod is about millimeter with the gap of piston.Idle stroke=dead stroke+push rod clearance.
Clutch master cylinder work time, let slip the clutch, clutch master cylinder push rod promote piston 11 to left movement, first
Compensation hole 3 between sealing ring 9 more overcompensation hole 3(piston 11 and centre valve 2 closes up), centre valve 2 pressurized is closed, working chamber 7
In set up oil pressure, continue pedal, the brake fluid in working chamber 7 is pressed in the oil pocket of clutch booster by pipeline,
Promote clutch separation.Releasing the clutch pedal, the active force lower piston 11 at oil pressure with return spring 8 moves right, now
Piston return speed is faster than the back-flow velocity of brake fluid in pipeline, and oil circuit forms negative pressure, and centre valve 2 opens (piston 11 and center
Compensation hole 3 between valve 2 is opened), the brake fluid in working chamber 7 is back in oil can [5] by hydraulic cavities 10.
Above content is to combine the further description that this utility model is done by detailed description of the invention, it is impossible to think this
Being embodied as of utility model is confined to these explanations, comes for this utility model person of an ordinary skill in the technical field
Say, without departing from the concept of the premise utility, the simple replacement made, all should be considered as belonging to of the present utility model
Protection domain.
Claims (5)
1. a clutch master cylinder, the piston (11) including the pump housing (1) and being axially sequentially placed in the pump housing (1) cavity, in
Heart valve (2), return spring (8)；Described piston (11) is slidably arranged in the cavity of the pump housing (1), the cavity quilt of the described pump housing (1)
The first sealing ring (9) being sheathed on piston (11) and the second sealing ring (12) are divided into working chamber (7) and hydraulic cavities (10)；Institute
The inwall stating annular groove on piston (11) sidewall and the pump housing (1) forms hydraulic cavities (10), described hydraulic cavities (10) pass through into
Oilhole (4) connects with oil can (5), and described hydraulic cavities (10) is by being arranged at the internal oilhole of piston (11) and centre valve (2)
Oil duct is connected with working chamber (7)；Described centre valve (2) and return spring (8) are positioned at working chamber (7), described working chamber
(7) it is connected with clutch booster by pipeline；It is characterized in that: be arranged with on described piston (11) two outer ring sidewalls with
The support ring (6) that the inwall of the pump housing (1) is slidably matched.
A kind of clutch master cylinder the most according to claim 1, it is characterised in that: two described support rings (6) are pacified respectively
It is placed in head and the afterbody of piston (11).
A kind of clutch master cylinder the most according to claim 1 and 2, it is characterised in that: described support ring (6) is by wear-resisting Buddhist nun
Dragon material is fabricated by.
A kind of clutch master cylinder the most according to claim 1, it is characterised in that: described centre valve (2) passes through return spring
(8) being resisted against at the oilhole of piston (11) head end, on the end face of described piston (11) afterbody, pad is provided with circlip (13).
A kind of clutch master cylinder the most according to claim 4, it is characterised in that: described centre valve (2) and piston (11) it
Between pad be provided with flexible member；When pushes pedals makes piston (11) compression retracteding position spring (8), this flexible member is compressed, piston
(11) the compensation hole (3) and between centre valve (2) closes up, and centre valve (2) cuts out；When pedal removes pedal force, return spring (8)
When recovering length, this flexible member resilience extends, and the compensation hole (3) between piston (11) and centre valve (2) is opened, centre valve
(2) open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620510668.5U CN205859002U (en) | 2016-05-30 | 2016-05-30 | Clutch master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620510668.5U CN205859002U (en) | 2016-05-30 | 2016-05-30 | Clutch master cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205859002U true CN205859002U (en) | 2017-01-04 |
Family
ID=57639106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620510668.5U Active CN205859002U (en) | 2016-05-30 | 2016-05-30 | Clutch master cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205859002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989920A (en) * | 2017-11-29 | 2018-05-04 | 威伯科汽车控制系统（中国）有限公司 | Clutch master cylinder |
| CN109505887A (en) * | 2018-12-07 | 2019-03-22 | 上海上汽马瑞利动力总成有限公司 | A kind of anti-leak piston formula clutch |
-
2016
- 2016-05-30 CN CN201620510668.5U patent/CN205859002U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989920A (en) * | 2017-11-29 | 2018-05-04 | 威伯科汽车控制系统（中国）有限公司 | Clutch master cylinder |
| CN107989920B (en) * | 2017-11-29 | 2019-06-28 | 威伯科汽车控制系统（中国）有限公司 | Clutch master cylinder |
| CN109505887A (en) * | 2018-12-07 | 2019-03-22 | 上海上汽马瑞利动力总成有限公司 | A kind of anti-leak piston formula clutch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |