CN104176029A - Brake pump provided with limit check hole - Google Patents
Brake pump provided with limit check hole Download PDFInfo
- Publication number
- CN104176029A CN104176029A CN201410345737.7A CN201410345737A CN104176029A CN 104176029 A CN104176029 A CN 104176029A CN 201410345737 A CN201410345737 A CN 201410345737A CN 104176029 A CN104176029 A CN 104176029A
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- China
- Prior art keywords
- piston rod
- valve rod
- rod
- valve
- hole
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Abstract
The invention relates to a brake pump provided with a limit hole. The brake pump comprises a pump body, wherein a working chamber is formed in the lower part of the pump body, an oil storage chamber is formed in the upper part of the pump body, a piston rod is arranged in the working chamber, a spring is arranged on the left side of the piston rod, a check valve is arranged in the oil storage chamber, a valve rod is arranged in the check valve, and the limit hole is formed in the working chamber. According to the brake pump, the limit hole for limiting the piston rod is added in the conventional working chamber, the extreme position of the piston rod is simply and effectively controlled by the limit hole in an annular step shape, and the compression degree of the valve rod by the piston rod is reduced, so that the impact bearing strength of the valve rod is reduced, the service life of the valve rod is prolonged, the requirement for the production strength of the valve rod is reduced, and the production cost is saved; the structural design of an annular groove in the left side of the piston rod is adopted, and accordingly, wear of the piston rod or the valve rod due to downward bulging of the lower end of the valve rod is avoided in a process that the piston rod shifts the valve rod to rotate.
Description
Technical field
The present invention relates to vehicular spare parts technical field, specifically a kind of brake pump that stops hole with limited location.
Background technology
Master brake cylinder is also referred to as braking main oil (gas) cylinder, and its Main Function is to promote piston among promotion braking liquid (or gas) transfers to each brake cylinder.
Clutch master cylinder is the part that is connected to clutch foot plate and is connected with clutch booster by oil pipe, and its effect is to gather pedal stroke information exchange to cross the effect of servo-unit that power-transfer clutch is realized is separated.
The Fill valve of existing master brake cylinder or clutch master cylinder (check valve), when not working, by spring, be fixed on initial position, piston rod is against a side of valve rod away from one end of pedal, make valve rod skew, Fill valve is opened, in this process, piston rod is supported to end position by spring, piston rod also supports valve rod to end position, under this state, valve rod is subject to the very large pressure of piston rod, valve rod is all the time under stressed state, damage to valve rod is larger, also be greatly affected the service life of valve rod, and this compressing structure is had relatively high expectations to the build guality of valve rod, therefore, this kind controls by piston rod the control that structure that Fill valve opens and closes is unfavorable for productive costs and quality, also the use safety of the pump housing and user's the security of the lives and property is caused to certain hidden danger.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of brake pump that stops hole with limited location.
The present invention solves its technical matters and realizes by the following technical solutions:
A kind of brake pump that stops hole with limited location, comprise the pump housing, the bottom of the described pump housing is provided with epitrochoidal chamber, described pump housing top is provided with shoe cream room, in described epitrochoidal chamber, be provided with piston rod, described piston rod left side is provided with spring, in described shoe cream room, be provided with check valve, in described check valve, be provided with valve rod, when work, pedal promotes piston rod and is moved to the left, the oil pressure in epitrochoidal chamber left side raises, fluid flow to brake cylinder or clutch slave cylinder by discharge outlet, unclamp after pedal, spring promotes piston rod and resets, piston rod is pushed valve rod aside, one-way valve opens, fluid in shoe cream room is again full of epitrochoidal chamber under Action of Gravity Field, described epitrochoidal chamber middle part is provided with spacing only hole, the described spacing hole of stopping is step-like ringwise, when described valve rod under the stirring of piston rod to a lateral deviation when oblique, due to the spacing only position-limiting action of hole to piston rod, piston rod can not shifted onto end position by spring, also be that piston rod can not be allocated to end position by valve rod, valve rod is also no longer subject to larger pressure, valve rod extends service life greatly, reduced the production requirement to valve rod mechanical strength, process this spacing only hole and only need change original single cutter into combined tool, processing work chamber on same station, epitrochoidal chamber and the spacing only concentricity in hole have been guaranteed, epitrochoidal chamber and the spacing only relative dimensions in hole are directly controlled by cutter, easy to operate, and technique is without larger change, production efficiency and the quality of production all can better be controlled.
Described spacing only hole with the line of centers of shoe cream room in same plane, take shoe cream room line of centers as benchmark convenient to the spacing control that stops hole machining accuracy.
The left side of described piston rod is provided with circular groove, when piston rod, stir valve rod to the right during deflection, valve rod rotates around the valve rod upper right corner, and the lower left corner of valve rod is outstanding downwards, the setting of described circular groove, has avoided the lower left corner of valve rod to be pressed on piston rod when giving prominence to downwards.
The invention has the beneficial effects as follows: the present invention has added the spacing only hole spacing to piston rod in existing epitrochoidal chamber, the end position of piston rod has been controlled in the spacing only hole of annular table scalariform simply and effectively, slowed down the compression degree of piston rod to valve rod, thereby reduced the intensity that valve rod withstands shocks, extended the service life of valve rod, reduce the production intensity requirement to valve rod, saved productive costs; Employing arranges the structure design of a ring annular groove in the left side of piston rod, avoided piston rod in stirring the process that valve rod rotates, because of valve rod lower end downwards outstanding cause piston rod or valve rod even at the cost of one's life or wearing and tearing.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the inner structure schematic diagram of prior art middle pump body;
Fig. 2 is inner structure schematic diagram of the present invention;
Fig. 3 is the enlarged drawing of I in Fig. 1;
Fig. 4 is the enlarged drawing of II in Fig. 2.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figures 1 to 4, a kind of brake pump that stops hole with limited location, comprise the pump housing 1, the bottom of the described pump housing 1 is provided with epitrochoidal chamber 8, the described pump housing 1 top is provided with shoe cream room 7, in described epitrochoidal chamber 8, be provided with piston rod 4, described piston rod 4 left sides are provided with spring 5, in described shoe cream room 7, be provided with check valve 2, in described check valve 2, be provided with valve rod 3, when work, pedal promotes piston rod 4 and is moved to the left, the oil pressure in epitrochoidal chamber 8 left sides raises, fluid flow to brake cylinder or clutch slave cylinder by discharge outlet, unclamp after pedal, spring 5 promotes piston rod 4 and resets, piston rod 4 is pushed valve rod 3 aside, check valve 2 is opened, fluid in shoe cream room 7 is again full of epitrochoidal chamber 8 under Action of Gravity Field, described epitrochoidal chamber 8 middle parts are provided with spacing only hole, described spacing only hole is annular table scalariform, when described valve rod 3 under the stirring of piston rod 4 to a lateral deviation when oblique, due to the spacing only position-limiting action of the 6 pairs of piston rods 4 in hole, piston rod 4 can not shifted onto end position by spring 5, also be that piston rod 4 can not be allocated to end position by valve rod 3, valve rod 3 is also no longer subject to larger pressure, valve rod extends for 3 service lifes greatly, reduced the production requirement to valve rod 3 mechanical strengths, processing this 6, spacing only hole needs to change original single cutter into combined tool, processing work chamber 8 on same station, epitrochoidal chamber 8 and the spacing only concentricity in hole 6 have been guaranteed, epitrochoidal chamber 8 and the spacing only relative dimensions in hole 6 are directly controlled by cutter, easy to operate, and technique is without larger change, production efficiency and the quality of production all can better be controlled.
Described spacing only hole 6 with the line of centers of shoe cream room 7 in same plane, take shoe cream room 7 line of centers as benchmark convenient to the spacing only control of hole 6 machining accuracies.
The left side of described piston rod 4 is provided with circular groove, when piston rod 4, stir valve rod 3 to the right during deflection, valve rod 3 rotates around valve rod 3 upper right corner, and the lower left corner of valve rod 3 is outstanding downwards, the setting of described circular groove, has avoided the lower left corner of valve rod 3 to be pressed on piston rod 4 when giving prominence to downwards.
More than show and described groundwork of the present invention, principal character and advantage of the present invention.The technical personnel of the industry should be understood; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. a brake pump that stops hole with limited location, comprise the pump housing, the bottom of the described pump housing is provided with epitrochoidal chamber, pump housing top is provided with shoe cream room, in described epitrochoidal chamber, is provided with piston rod, and described piston rod left side is provided with spring, it is characterized in that: in described shoe cream room, be provided with check valve, in described check valve, be provided with valve rod, be provided with spacing only hole in described epitrochoidal chamber, the described spacing hole of stopping is step-like ringwise.
2. a kind of brake pump that stops hole with limited location according to claim 1, is characterized in that: the line of centers of described spacing only hole and shoe cream room is in same plane.
3. a kind of brake pump that stops hole with limited location according to claim 1, is characterized in that: the left side of described piston rod is provided with circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410345737.7A CN104176029A (en) | 2014-07-19 | 2014-07-19 | Brake pump provided with limit check hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410345737.7A CN104176029A (en) | 2014-07-19 | 2014-07-19 | Brake pump provided with limit check hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104176029A true CN104176029A (en) | 2014-12-03 |
Family
ID=51957476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410345737.7A Pending CN104176029A (en) | 2014-07-19 | 2014-07-19 | Brake pump provided with limit check hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104176029A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0302629A2 (en) * | 1987-08-06 | 1989-02-08 | LUCAS INDUSTRIES public limited company | Master cylinder assembly |
| WO2005051743A1 (en) * | 2003-11-25 | 2005-06-09 | Carlisle Brake Products (Uk) Limited | Twin master cylinder assembly |
| CN201682809U (en) * | 2010-04-08 | 2010-12-29 | 丹东市辽东液压件厂 | Harvester hydraulic brake pump |
| CN202783176U (en) * | 2012-08-17 | 2013-03-13 | 湖北航天技术研究院特种车辆技术中心 | Sealing assembly for main brake cylinder |
| CN203172614U (en) * | 2013-03-25 | 2013-09-04 | 玉环奥恒机械有限公司 | Hydraulic brake master pump structure of agricultural harvester |
| CN203172612U (en) * | 2013-01-10 | 2013-09-04 | 玉环奥恒机械有限公司 | Hydraulic brake master cylinder structure for tractor |
-
2014
- 2014-07-19 CN CN201410345737.7A patent/CN104176029A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0302629A2 (en) * | 1987-08-06 | 1989-02-08 | LUCAS INDUSTRIES public limited company | Master cylinder assembly |
| WO2005051743A1 (en) * | 2003-11-25 | 2005-06-09 | Carlisle Brake Products (Uk) Limited | Twin master cylinder assembly |
| CN201682809U (en) * | 2010-04-08 | 2010-12-29 | 丹东市辽东液压件厂 | Harvester hydraulic brake pump |
| CN202783176U (en) * | 2012-08-17 | 2013-03-13 | 湖北航天技术研究院特种车辆技术中心 | Sealing assembly for main brake cylinder |
| CN203172612U (en) * | 2013-01-10 | 2013-09-04 | 玉环奥恒机械有限公司 | Hydraulic brake master cylinder structure for tractor |
| CN203172614U (en) * | 2013-03-25 | 2013-09-04 | 玉环奥恒机械有限公司 | Hydraulic brake master pump structure of agricultural harvester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141203 |