CN101239618A - Brake master cylinder of car hydraulic brake - Google Patents
Brake master cylinder of car hydraulic brake Download PDFInfo
- Publication number
- CN101239618A CN101239618A CNA2007101150449A CN200710115044A CN101239618A CN 101239618 A CN101239618 A CN 101239618A CN A2007101150449 A CNA2007101150449 A CN A2007101150449A CN 200710115044 A CN200710115044 A CN 200710115044A CN 101239618 A CN101239618 A CN 101239618A
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- brake
- cylinder body
- piston
- positioning spacer
- cylinder
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- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
The present invention provides a brake master cylinder of auto hydraulically actuated brake, the mainly technical points is that: a first ring gap is between bore surface of cylinder and peripheral surface of piston, the front end of a location casing extends in the first ring gap, the front of the location casing is set with a axially extending bore connected with a fluid reservoir, a primary cup is set in the first ring gap, a valve plate is set in the first ring gap, the valve plate is located between the front end of the location casing and the primary cup. The brake fluid in the reservoir compartment achieves to the back of the primary cup via the outer of the location casing, and achieves the back of the primary cup from axially extending bore of the location casing, greatly enhances speed of recharging oil, shortens recharging oil time. Moreover, when brake liquid is quickly injected from the axially extending bore of the location casing, the primary cup is not impacted because of the baffle of the valve plate, ensures that the wholly using life of the brake cylinder is not impacted.
Description
Technical field
The present invention relates to the car hydraulic brake technical field, relate in particular to a kind of brake master cylinder of car hydraulic brake.
Background technology
Master brake cylinder is the main brake component in the hydraulic braking system for automobile, by the braking liquid of its output through oil outlet by the brake wheel cylinder on the brake piping input brake disc, thereby realize the purpose of braking automobile braking.
Common master brake cylinder directly supports primary cup by positioning spacer, when finishing braking, when cancelling thrust, piston is rapid return under the effect of pull back spring, produce negative pressure in the brake chamber, under the effect of negative pressure, braking liquid enters brake chamber through the primary cup periphery again by the rear portion of reservoir compartment through the outer peripheral face arrival primary cup of positioning spacer.Because of the outer peripheral face of positioning spacer needs match with cylinder body and piston, and tolerance clearance is very little, and braking liquid arrives the speed at rear portion of primary cup through the outer peripheral face of positioning spacer from reservoir compartment slower, and the repairing time is longer relatively.
Summary of the invention
Technical matters to be solved by this invention is: brake master cylinder of car hydraulic brake, this master brake cylinder has improved repairing speed, has shortened the repairing time.
For solving the problems of the technologies described above, technical scheme of the present invention is: brake master cylinder of car hydraulic brake, comprise cylinder body, be installed on the oil sealing end cap of the open end of described cylinder body, piston, be installed on the positioning spacer that is used to support described piston in the cavity of described cylinder body, described positioning spacer cooperates with described piston play, described positioning spacer is separated into brake chamber and liquid storage cylinder with the cavity of described cylinder body, described the axis of the piston is to passing described oil sealing end cap and stretching in the brake chamber of described cylinder body, described piston is provided with the compensation orifice that the brake chamber and the liquid storage cylinder of described cylinder body can be communicated with, be installed on the described cylinder body and the fuel inlet fitting that is communicated with described liquid storage cylinder, be arranged at the oil outlet that is communicated with described brake chamber on the described cylinder body, be installed on the interior pull back spring of brake chamber of described cylinder body, has first circular clearance between the inner hole surface of described cylinder body and the outer peripheral face of described piston, the front end of described positioning spacer stretches in described first circular clearance, be provided with primary cup in described first circular clearance, has second circular clearance between the inner hole surface of described oil sealing end cap and the outer peripheral face of described piston, the rear end of described positioning spacer is stretched in described second circular clearance, be provided with secontary cup in described second circular clearance, the front end of described positioning spacer is provided with the axially extending bore that is communicated with described liquid storage cylinder.
As a kind of specific embodiment, in described first circular clearance valve block is installed, described valve block is between the front end face and described primary cup of described positioning spacer.
After having adopted technique scheme, the invention has the beneficial effects as follows: because the front end of described positioning spacer is provided with the axially extending bore that is communicated with described liquid storage cylinder, so, when finish braking, when cancelling thrust, piston is rapid return under the effect of pull back spring, produce negative pressure in the brake chamber, under the effect of negative pressure, braking liquid in the reservoir compartment not only arrives the rear portion of primary cup through the periphery of positioning spacer, but also the axially extending bore from the positioning spacer arrives the rear portion of primary cup, improve repairing speed greatly, shortened the repairing time.
Owing in described first circular clearance valve block is installed, described valve block is between the front end face and described primary cup of described positioning spacer, when the axially extending bore of braking liquid from positioning spacer penetrates fast, because stopping of valve block, can not impact, guarantee that the whole service life of master brake cylinder is unaffected primary cup.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Accompanying drawing is the longitudinal sectional view of the embodiment of the invention.
The specific embodiment
As shown in drawings, a kind of brake master cylinder of car hydraulic brake, comprise cylinder body 01, be installed on the oil sealing end cap 07 of the open end of described cylinder body 01, piston 08, be installed on the positioning spacer 10 that is used to support described piston 08 in the cavity of described cylinder body 01, described positioning spacer 10 and described piston 08 free-running fit, described positioning spacer 10 is separated into brake chamber 03 and liquid storage cylinder 06 with the cavity of described cylinder body 01, described piston 08 axially passes described oil sealing end cap 07 and stretches in the brake chamber 03 of described cylinder body 01, described piston 08 is provided with the compensation orifice 12 that the brake chamber 03 and the liquid storage cylinder 06 of described cylinder body can be communicated with, be installed on the described cylinder body 01 and the fuel inlet fitting 05 that is communicated with described liquid storage cylinder 06, be arranged at the oil outlet 02 that is communicated with described brake chamber 03 on the described cylinder body 01, be installed on the pull back spring 14 in the brake chamber 03 of described cylinder body, has first circular clearance between the outer peripheral face of the inner hole surface of described cylinder body 01 and described piston 08, the front end of described positioning spacer 10 stretches in described first circular clearance, the front end of described positioning spacer 10 is provided with the axially extending bore 11 that is communicated with described liquid storage cylinder 06, be provided with primary cup 13 in described first circular clearance, has second circular clearance between the outer peripheral face of the inner hole surface of described oil sealing end cap 07 and described piston 08, the rear end of described positioning spacer 10 is stretched in described second circular clearance, be provided with secontary cup 09 in described second circular clearance, in described first circular clearance valve block 04 is installed, described valve block 04 is between the front end face and described primary cup 13 of described positioning spacer 10, and valve block 04 is preferably the manganese steel material.
Principle of work is as follows:
When initial state (output of brakeless liquid), the braking liquid of brake chamber 03 is connected with reservoir compartment 06 by the compensation orifice on the piston 08 12, and reservoir compartment 06 links to each other with receiver by fuel inlet fitting 05, and this moment, brake chamber 03 hydraulic pressure was zero.
As input thrust F, promote piston 08 reach, when the compensation orifice 12 on the piston 08 was blocked by primary cup 13, brake chamber 03 no longer was communicated with reservoir compartment 06, brake chamber 03 begins to produce hydraulic pressure, and the oil outlet 02 of braking liquid on cylinder body 01 enters brake wheel cylinder and produce braking through brake piping.
After finishing braking, cancel thrust F, piston 08 is rapid return under the effect of pull back spring 14, produce negative pressure in the brake chamber 03, under the effect of negative pressure, braking liquid enters brake chamber 03 through primary cup 13 peripheries again by the rear portion of the axially extending bore 11 arrival primary cups 13 of reservoir compartment 06 on positioning spacer, and the braking liquid in brake wheel cylinder and the pipeline partly returns brake chamber 03 simultaneously.During the complete return of piston 08, under the effect of drg, the braking liquid in the brake wheel cylinder enters brake chamber 03 through oil outlet 02, and the compensation orifice 12 of unnecessary braking liquid on piston 08 directly enters reservoir compartment 06.After the brake wheel cylinder motion finished, unnecessary braking liquid flow back into reservoir compartment 06 through the compensation orifice 12 of piston 08, flow back into through fuel inlet fitting 05 and set up new balance in the receiver.
When the axially extending bore 11 of braking liquid from positioning spacer penetrated fast, valve block 04 had stopped this impact, thereby primary cup 13 has been played protective effect.
Under the effect of negative pressure, the braking liquid in the reservoir compartment 06 not only arrives the rear portion of primary cup 13 through the periphery of positioning spacer 10, but also the axially extending bore 11 from the positioning spacer arrives the rear portion of primary cups 13, has improved repairing speed greatly, has shortened the repairing time.Moreover, owing in described first circular clearance valve block 04 is installed, when the axially extending bore 11 of braking liquid from positioning spacer penetrates fast, owing to stopping of valve block 04, can not impact, guarantee that the whole service life of master brake cylinder is unaffected primary cup 13.
Claims (3)
1. brake master cylinder of car hydraulic brake comprises
Cylinder body (01),
Be installed on the oil sealing end cap (07) of the open end of described cylinder body (01),
Piston (08),
Be installed on the positioning spacer (10) that is used to support described piston (08) in the cavity of described cylinder body (01), described positioning spacer (10) and described piston (08) free-running fit, described positioning spacer (10) is separated into brake chamber (03) and liquid storage cylinder (06) with the cavity of described cylinder body (01)
Described piston (08) axially passes described oil sealing end cap (07) and stretches in the brake chamber (03) of described cylinder body (01), and described piston (08) is provided with the compensation orifice (12) that the brake chamber (03) and the liquid storage cylinder (06) of described cylinder body can be communicated with,
Be installed on the fuel inlet fitting (05) that described cylinder body (01) is gone up and is communicated with described liquid storage cylinder (06),
Be arranged at described cylinder body (01) and go up the oil outlet (02) that is communicated with described brake chamber (03),
Be installed on the interior pull back spring (14) of brake chamber (03) of described cylinder body,
Have first circular clearance between the outer peripheral face of the inner hole surface of described cylinder body (01) and described piston (08), the front end of described positioning spacer (10) stretches in described first circular clearance, is provided with primary cup (13) in described first circular clearance,
Has second circular clearance between the outer peripheral face of the inner hole surface of described oil sealing end cap (07) and described piston (08), the rear end of described positioning spacer (10) is stretched in described second circular clearance, be provided with secontary cup (09) in described second circular clearance, it is characterized in that:
The front end of described positioning spacer (10) is provided with the axially extending bore (11) that is communicated with described liquid storage cylinder (06).
2. brake master cylinder of car hydraulic brake as claimed in claim 1 is characterized in that: valve block (04) is installed in described first circular clearance, and described valve block (04) is positioned between the front end face and described primary cup (13) of described positioning spacer (10).
3. brake master cylinder of car hydraulic brake as claimed in claim 2 is characterized in that: described valve block (04) is made of the manganese steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101150449A CN101239618A (en) | 2007-12-05 | 2007-12-05 | Brake master cylinder of car hydraulic brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101150449A CN101239618A (en) | 2007-12-05 | 2007-12-05 | Brake master cylinder of car hydraulic brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101239618A true CN101239618A (en) | 2008-08-13 |
Family
ID=39931547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101150449A Pending CN101239618A (en) | 2007-12-05 | 2007-12-05 | Brake master cylinder of car hydraulic brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101239618A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941849A (en) * | 2012-11-27 | 2013-02-27 | 日照市北业制动泵有限公司 | Brake master cylinder of automobile hydraulic brake |
| CN103373333A (en) * | 2012-04-30 | 2013-10-30 | 株式会社万都 | Master cylinder for brake systems |
| CN103826948A (en) * | 2011-09-30 | 2014-05-28 | 罗伯特·博世有限公司 | Master brake cylinder for a vehicle brake system and production method for a master brake cylinder |
| CN105339223A (en) * | 2013-07-02 | 2016-02-17 | 罗伯特·博世有限公司 | Master cylinder primary piston |
-
2007
- 2007-12-05 CN CNA2007101150449A patent/CN101239618A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826948A (en) * | 2011-09-30 | 2014-05-28 | 罗伯特·博世有限公司 | Master brake cylinder for a vehicle brake system and production method for a master brake cylinder |
| CN103826948B (en) * | 2011-09-30 | 2016-08-17 | 罗伯特·博世有限公司 | Main braking cylinder for motor vehicle braking system and the manufacture method for main braking cylinder |
| US9896077B2 (en) | 2011-09-30 | 2018-02-20 | Robert Bosch Gmbh | Master brake cylinder for a braking system of a vehicle, and manufacturing method for a master brake cylinder |
| CN103373333A (en) * | 2012-04-30 | 2013-10-30 | 株式会社万都 | Master cylinder for brake systems |
| CN103373333B (en) * | 2012-04-30 | 2015-10-28 | 株式会社万都 | For the master cylinder of brake system |
| CN102941849A (en) * | 2012-11-27 | 2013-02-27 | 日照市北业制动泵有限公司 | Brake master cylinder of automobile hydraulic brake |
| CN105339223A (en) * | 2013-07-02 | 2016-02-17 | 罗伯特·博世有限公司 | Master cylinder primary piston |
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|---|---|---|---|
| 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 |
Open date: 20080813 |