CN109027065A - Drum brake wheel cylinder structure - Google Patents
Drum brake wheel cylinder structure Download PDFInfo
- Publication number
- CN109027065A CN109027065A CN201810946460.1A CN201810946460A CN109027065A CN 109027065 A CN109027065 A CN 109027065A CN 201810946460 A CN201810946460 A CN 201810946460A CN 109027065 A CN109027065 A CN 109027065A
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- CN
- China
- Prior art keywords
- wheel cylinder
- wheelcylinder piston
- piston
- wheelcylinder
- leather cup
- 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.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a kind of drum brake wheel cylinder structures, belong to automobile brake technical field.Wheelcylinder piston one and wheelcylinder piston two are respectively assembled at the two sides of wheel cylinder cylinder holes, wheel cylinder is respectively clearance fit with wheelcylinder piston one and wheelcylinder piston two, sealing function part one is connect with wheelcylinder piston one and wheel cylinder respectively, sealing function part two is connect with wheelcylinder piston two and wheel cylinder respectively, wheel cylinder inner hole has two leather cup mounting grooves, leather cup one and leather cup two are separately mounted on the leather cup mounting groove of wheel cylinder, wheelsylinder spring is mounted between wheelcylinder piston one and wheelcylinder piston two, and wheelcylinder piston one and wheelcylinder piston two are external cylindrical surface.The present invention has the advantages that structure novel, increase wheelcylinder piston axially engages length with wheel cylinder cylinder holes, keep wheel cylinder cylinder holes to the guiding performance of wheelcylinder piston, slow down friction phenomenon of the wheelcylinder piston in braking process, therefore the roughness grade number of wheelcylinder piston outer surface is higher, and dynamic sealing performance is better.
Description
Technical field
The invention belongs to automobile brake technical fields, refer in particular to the improvement of a kind of pair of drum brake wheel cylinder.
Background technique
Drum brake is the braking executive device in braking system, is the critical component in brake system of car.Its work
It as principle is conducted by brake piping total to the wheel cylinder in rear drum brake using the hydraulic of brake master cylinder assy generation
At after wheelcylinder piston pushes braking shoe assembly under hydraulic action, braking shoe assembly generates frictional resistance with brake drum to prevent
The trend of rotation or the rotation of wheel.The element of drum brake is fewer than disk brake, and structure is simple, and manufacturing cost compares
It is low.
When normal vehicle operation, clearance adjustment mechanism, resetting-mechanism comprehensive work of the brake-shoe in drum brake inside
Under, brake-shoe rubbing surface keeps certain gap with brake drum always, when driver's brake pedal is braked, pipe
Two wheelcylinder pistons in hydraulic drive wheel cylinder in road are displaced outwardly, and wheelcylinder piston pushes two braking shoe assemblies close to system again
Dynamic drum, braking shoe assembly and brake drum generate frictional resistance to prevent the trend of rotation or the rotation of wheel.After releasing braking,
Pedal return, hydraulic release in pipeline brake shoe assembly and are detached from brake drum to initial bit under resetting-mechanism effect in brake
Movement is set, wheelcylinder piston moves under the thrust of braking shoe assembly into wheel cylinder, until braking shoe assembly adjusts in gap
It is fixed on initial position under the support force effect of mechanism, wheelcylinder piston is also in the frictional force of wheelcylinder cup and wheel cylinder, wheelsylinder spring
Thrust under, primary braking, release process are completed in also stop motion.
Wheel cylinder assembly is the key components and parts mechanism of drum brake.
Conventional wheel cylinder assembly by former sealing function part one 1 ' and former sealing function part 28 ', former leather cup one 2 ' and former leather cup
27 ', former wheelcylinder piston one 3 ' and former wheelcylinder piston 26 ', former wheelsylinder spring 4 ', former wheel cylinder 5 ' form, wheel cylinder internal junction configuration
Formula (see Fig. 1 wheel cylinder assembly cross-sectional view) is the two sides that two pistons are assemblied in wheel cylinder cylinder holes, former wheelcylinder piston one 3 ' and former wheel cylinder
Piston 26 ' above process annular groove, for assemble former leather cup 1 ' and former leather cup 27 ', wheel cylinder and piston are clearance fit, and leather cup
All it is interference fit with wheel cylinder and two pistons, forms seal chamber after assembly.Former wheelcylinder piston 1 ' and former wheelcylinder piston 26 '
Centre is equipped with former wheelsylinder spring 4 ', and wheelcylinder piston can be pushed to the braking hoof of two sides by the spring resistance of former wheelsylinder spring 4 '
Part guarantees that two-piston is located at a fixed position in wheel cylinder in non-braking state.With the friction material on braking shoe assembly
Expect abrasion during vehicle braking, two pistons are gradually mobile to wheel cylinder outside relative to wheel cylinder, until the mobile pole of piston
Extreme position (the maximum of former wheelcylinder piston one 3 ' and former wheelcylinder piston 26 ' with former leather cup one 2 ' and former leather cup 27 ' when being interference fitted
Overhang), leather cup still is able to play sealing function at this time, but piston is excessive with respect to wheel cylinder oral area overhang, outside piston
Cylindrical surface and wheel cylinder inner hole cylindrical surface length of fit are very small (regulation is no less than 3mm), and piston is in hydraulic coupling and braking hoof
Easily deflection (piston axis and wheel cylinder axis angle increase), causes piston to add with wheel cylinder bore wear under the action of part pressure
Play, cup packing is deteriorated or even piston return clamping stagnation.
Summary of the invention
The present invention provides a kind of drum brake wheel cylinder structure, to solve the opposite wheel cylinder of piston in existing wheel cylinder structure
Oral area overhang is excessive, and outside piston cylinder and wheel cylinder inner hole cylindrical surface length of fit are very small, and piston is in hydraulic coupling and braking
It is easily deflected under the action of shoe assembly pressure, causes piston and wheel cylinder bore wear to aggravate, cup packing is deteriorated or even piston
The problem of return clamping stagnation.
The technical scheme is that the present invention is by sealing function part one, leather cup one, wheelcylinder piston one, wheelsylinder spring, wheel
Cylinder, wheelcylinder piston two, leather cup two, sealing function part two form, and wheelcylinder piston one and wheelcylinder piston two are respectively assembled at wheel cylinder cylinder
The two sides in hole, wheel cylinder are respectively clearance fit with wheelcylinder piston one and wheelcylinder piston two, and sealing function part one is living with wheel cylinder respectively
Plug one is connected with wheel cylinder, and sealing function part two is connect with wheelcylinder piston two and wheel cylinder respectively, and wheel cylinder inner hole has two leather cup installations
Slot, leather cup one and leather cup two are separately mounted on the leather cup mounting groove of wheel cylinder, and wheelsylinder spring is mounted on wheelcylinder piston one and wheel cylinder
Between piston two, wheelcylinder piston one and wheelcylinder piston two are external cylindrical surface.
The present invention has the advantages that structure novel, increases axially engage length of the wheelcylinder piston with wheel cylinder cylinder holes, keeps wheel
Cylinder cylinder holes slows down friction phenomenon of the wheelcylinder piston in braking process to the guiding performance of wheelcylinder piston, reduces wheelcylinder piston in pole
The risk of clamping stagnation when extreme position return increases the service life of wheel cylinder assembly；Wheelcylinder piston external cylindrical surface and wheelcylinder cup are by shape
At dynamic sealing state, i.e., wheelcylinder piston will be produced relative sliding with leather cup in braking process, therefore wheelcylinder piston outer surface
Roughness grade number is higher, and dynamic sealing performance is better, relative to traditional wheel cylinder assembly sealing structure, wheel cylinder inner cylinder face and skin
Bowl-type exists at dynamic sealing state, raising of the raising than wheel cylinder inner cylinder face roughness of wheelcylinder piston external cylindrical surface surface roughness
It will be easier to realize in craftsmanship.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of background of invention；
In figure, former sealing function part 1 ', former leather cup 1 ', former wheelcylinder piston 1 ', it is former wheelsylinder spring 4 ', former wheel cylinder 5 ', former
Wheelcylinder piston 26 ', former leather cup 27 ', former sealing function part 28 '；
Fig. 2 is structural schematic diagram of the invention；
In figure, sealing function part 1, leather cup 1, wheelcylinder piston 1, wheelsylinder spring 4, wheel cylinder 5, wheelcylinder piston 26, leather cup two
7, sealing function part 28.
Specific embodiment
The present invention is by sealing function part 1, leather cup 1, wheelcylinder piston 1, wheelsylinder spring 4, wheel cylinder 5, wheelcylinder piston two
6, leather cup 27, sealing function part 28 form, and wheelcylinder piston 1 and wheelcylinder piston 26 are respectively assembled at the two of 5 cylinder holes of wheel cylinder
Side, wheel cylinder 5 are clearance fit with wheelcylinder piston 1 and wheelcylinder piston 26 respectively, sealing function part 1 respectively with wheelcylinder piston
1 and wheel cylinder 5 connect, sealing function part 28 connect with wheelcylinder piston 26 and wheel cylinder 5 respectively, and 5 inner hole of wheel cylinder has two leather cups
Mounting groove, leather cup 1 and leather cup 27 are separately mounted on the leather cup mounting groove of wheel cylinder 5, and wheelsylinder spring 4 is mounted on wheelcylinder piston
Between one 3 and wheelcylinder piston 26, wheelcylinder piston 1 and wheelcylinder piston 26 are external cylindrical surface.
The present invention has redesigned wheel cylinder internal structure, the contour structures of wheelcylinder piston one and wheelcylinder piston two, by wheel cylinder
Inner hole processes two leather cup mounting grooves, and for assembling leather cup one and leather cup two, wheelcylinder piston one and wheelcylinder piston two fill respectively
Fitting over the two sides of wheel cylinder cylinder holes, for two plunger designs at complete external cylindrical surface, wheel cylinder and two pistons are clearance fit, two
Leather cup and wheel cylinder and two pistons are all interference fits, seal chamber are formed after assembly, in wheelcylinder piston one and wheelcylinder piston two
Between be equipped with wheelsylinder spring, wheelcylinder piston can be pushed to the braking shoe assembly of two sides by the spring resistance of wheelsylinder spring, guarantee that two is living
Plug is located at a fixed position in wheel cylinder in non-braking state.As the friction material on braking shoe assembly is in vehicle braking
Abrasion in the process, two pistons are gradually mobile to wheel cylinder outside relative to wheel cylinder, until piston moving limit position.Such knot
Structure can ensure wheelcylinder piston periphery integrality, and wheel cylinder assembly increases wheel cylinder in the state of meeting identical function size
The length of fit of piston one and wheelcylinder piston two and wheel cylinder inner hole, especially at working limit position, one He of wheelcylinder piston at this time
Wheelcylinder piston two and wheel cylinder still have biggish length of fit (theoretical calculation can achieve 10mm or more), can prevent due to wheel
Wheelcylinder piston and the aggravation of wheel cylinder surface abrasion, sealing caused by the cylinder piston one and the stretching wheel cylinder displacement of wheelcylinder piston two are excessive
Property be deteriorated or the case where wheelcylinder piston return clamping stagnation occurs, ensure that wheel cylinder cylinder holes to the guiding performance of wheelcylinder piston, makes drum-type
Brake safety is improved.
Claims (1)
1. a kind of drum brake wheel cylinder structure, it is characterised in that: by sealing function part one, leather cup one, wheelcylinder piston one,
Wheelsylinder spring, wheel cylinder, wheelcylinder piston two, leather cup two, sealing function part two form, and wheelcylinder piston one and wheelcylinder piston two fill respectively
The two sides of wheel cylinder cylinder holes are fitted over, wheel cylinder is respectively clearance fit with wheelcylinder piston one and wheelcylinder piston two, and sealing function part one divides
It is not connect with wheelcylinder piston one and wheel cylinder, sealing function part two is connect with wheelcylinder piston two and wheel cylinder respectively, and wheel cylinder inner hole has two
Leather cup mounting groove, leather cup one and leather cup two are separately mounted on the leather cup mounting groove of wheel cylinder, and it is living that wheelsylinder spring is mounted on wheel cylinder
Between plug one and wheelcylinder piston two, wheelcylinder piston one and wheelcylinder piston two are external cylindrical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946460.1A CN109027065A (en) | 2018-08-20 | 2018-08-20 | Drum brake wheel cylinder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946460.1A CN109027065A (en) | 2018-08-20 | 2018-08-20 | Drum brake wheel cylinder structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109027065A true CN109027065A (en) | 2018-12-18 |
Family
ID=64631295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810946460.1A Withdrawn CN109027065A (en) | 2018-08-20 | 2018-08-20 | Drum brake wheel cylinder structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109027065A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446337A (en) * | 2021-07-13 | 2021-09-28 | 浙江亚太机电股份有限公司 | Plunger type wheel cylinder assembly |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0235994A1 (en) * | 1986-03-01 | 1987-09-09 | LUCAS INDUSTRIES public limited company | Improvements in self-energising disc brakes |
| US20040007431A1 (en) * | 2002-07-11 | 2004-01-15 | Manuel Barbosa | Wheel cylinder |
| KR20060064101A (en) * | 2004-12-08 | 2006-06-13 | 주식회사 만도 | Wheel cylinder for vehicle |
| CN201432654Y (en) * | 2009-06-18 | 2010-03-31 | 宫建 | Multi-functional plunger type automobile brake master cylinder |
| DE102012017643A1 (en) * | 2011-09-16 | 2013-03-21 | Mando Corporation | Wheel cylinder and drum brake with the same |
| CN103133559A (en) * | 2011-11-25 | 2013-06-05 | 北京市进联国玉制动泵有限责任公司 | Clutch main cylinder |
| CN204083000U (en) * | 2014-08-16 | 2015-01-07 | 吉林东光奥威汽车制动***有限公司 | The plunger-type brake master cylinder of piston integration |
| CN209196014U (en) * | 2018-08-20 | 2019-08-02 | 吉林东光奥威汽车制动***有限公司 | Drum brake wheel cylinder structure |
-
2018
- 2018-08-20 CN CN201810946460.1A patent/CN109027065A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0235994A1 (en) * | 1986-03-01 | 1987-09-09 | LUCAS INDUSTRIES public limited company | Improvements in self-energising disc brakes |
| US20040007431A1 (en) * | 2002-07-11 | 2004-01-15 | Manuel Barbosa | Wheel cylinder |
| KR20060064101A (en) * | 2004-12-08 | 2006-06-13 | 주식회사 만도 | Wheel cylinder for vehicle |
| CN201432654Y (en) * | 2009-06-18 | 2010-03-31 | 宫建 | Multi-functional plunger type automobile brake master cylinder |
| DE102012017643A1 (en) * | 2011-09-16 | 2013-03-21 | Mando Corporation | Wheel cylinder and drum brake with the same |
| CN103133559A (en) * | 2011-11-25 | 2013-06-05 | 北京市进联国玉制动泵有限责任公司 | Clutch main cylinder |
| CN204083000U (en) * | 2014-08-16 | 2015-01-07 | 吉林东光奥威汽车制动***有限公司 | The plunger-type brake master cylinder of piston integration |
| CN209196014U (en) * | 2018-08-20 | 2019-08-02 | 吉林东光奥威汽车制动***有限公司 | Drum brake wheel cylinder structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446337A (en) * | 2021-07-13 | 2021-09-28 | 浙江亚太机电股份有限公司 | Plunger type wheel cylinder assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181218 |