CN1528626A - Self-adjusting drum brake at parking - Google Patents
Self-adjusting drum brake at parking Download PDFInfo
- Publication number
- CN1528626A CN1528626A CNA031349226A CN03134922A CN1528626A CN 1528626 A CN1528626 A CN 1528626A CN A031349226 A CNA031349226 A CN A031349226A CN 03134922 A CN03134922 A CN 03134922A CN 1528626 A CN1528626 A CN 1528626A
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- China
- Prior art keywords
- self
- brake
- plate
- parking
- brake shoe
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Abstract
The invention relates to a self-adjusting drum brake to halt vehicle, adopting self-adjusting plectrum plate to hinge the bolt, the hook on one end of self-adjusting plectrum plate is hooked on the vehicle-halting draw arm, and the hook head on the other end of self-adjusting plectrum plate and the ratchet wheel of the self-adjusting device assembly are engaged. When halting vehicle, the vehicle-halting draw arm rotates around the pivot under the action of slope drawing force, one end of self-adjusting plectrum plate rotates with the vehicle-halting draw arm, the other end pokes the ratchet wheel to rotate, realizing automatic gap compensation through the screw and screw cover in the self-adjusting device assembly. It heightens reliability and life of the self-adjusting device.
Description
Technical field
The present invention relates to automobile drum brake.It specifically is a kind of function drum brake mechanism of when Parking, realizing clearance self-regulating.
Background technology
At present, known drum brake mechanism includes back-plate, brake wheel cylinder, brake shoe brake cheek band friction lining assembly, allots plate, self-reacting device assembly, pull back spring, brake shoe brake cheek hold-down mechanism etc. certainly.Wherein, common self-reacting device is in the driving braking procedure, and the gap between device, drum is during greater than design gaps, and the wheel cylinder hydraulic coupling promotes brake shoe brake cheek, drives from alloting plate, realizes automatic play compensation.But because service brake is frequent, when the actual gap between device, the drum during less than design gaps, the gap can not be compensated, and still moves and allot plate certainly, so just makes from alloting the plate premature fatigue, has shortened service life.
Summary of the invention
Existing in order to overcome from alloting plate at the numerous non-productive work of driving time-frequency, premature fatigue, the deficiency that shorten service life, technical matters to be solved by this invention is: a kind of drum brake mechanism of realizing the clearance self-regulating function when Parking is provided, because the frequency of braking during standstill obviously is less than the service brake frequency, avoided alloting certainly plate at the numerous non-productive work of driving time-frequency.
The technical solution adopted for the present invention to solve the technical problems is: plate one end of alloting certainly of self-reacting device assembly is placed on the pin of a brake shoe brake cheek, one end hook portion hook is in the Parking torque arm, the ratchet engaged of other end gib head and self-adjusting mechanism is alloted plate certainly and is connected with another brake shoe brake cheek by an extension spring.
The principle of work of said structure is such: during Parking, the Parking torque arm is rotated around fulcrum under the wire-pulling force effect, allots plate certainly and the Parking torque arm is linked to be an integral body by spring, and then rotate, drive the ratchet rotation from alloting the plate hook head,, realize clearance automatic compensation by screw rod, swivel nut.
The invention has the beneficial effects as follows, avoided from alloting plate the driving numerous non-productive work of time-frequency and alloting certainly plate premature fatigue, the reliability and the service life of having improved self-reacting device of causing.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structure principle chart of the present invention.
1. back-plates among the figure, 2. brake shoe brake cheek band friction lining assembly, 3. brake wheel cylinder, 4. self-reacting device assembly, 5. pin is 6. from alloting plate, 7. Parking torque arm, 8. brake shoe brake cheek hold-down mechanism, 9. extension spring
The specific embodiment
In Fig. 1, brake wheel cylinder 3, brake shoe brake cheek band friction lining assembly 2 is installed on the back-plate 1, and self-reacting device assembly 4 is installed in the groove of brake shoe brake cheek band friction lining assembly 2, brake shoe brake cheek band friction lining assembly 2 usefulness brake shoe brake cheek hold-down mechanisms 8 are back-plate 1 fixedly, and strains with pull back spring 9.Be articulated on the pin 5 on the brake shoe brake cheek from alloting plate 6, an end hook portion hook in Parking torque arm 7, the ratchet engaged of other end gib head and self-reacting device assembly 4.Be connected with another brake shoe brake cheek by extension spring 9 from alloting plate.During Parking, Parking torque arm 7 is rotated around fulcrum under the wire-pulling force effect, and alloting plate 6 certainly is an integral body with Parking torque arm 7, and then rotate, stir ratchet from the other end gib head of alloting plate and rotate,, realize clearance automatic compensation by screw rod, the swivel nut in the self-reacting device assembly 4.
Claims (2)
1, the drum brake mechanism of self-regulated during a kind of Parking, comprise back-plate (1), brake wheel cylinder (3), brake shoe brake cheek band friction lining assembly (2), Parking torque arm (7) and self-reacting device assembly (4), wherein brake shoe brake cheek band friction lining assembly (2) is installed on the back-plate (1), self-reacting device assembly (4) is installed in the groove of brake shoe brake cheek band friction lining assembly (2), brake shoe brake cheek band friction lining assembly (2) fixedly back-plate (1) of brake shoe brake cheek hold-down mechanism (8), and by pull back spring (9) tension; It is characterized in that: the alloting certainly on the pin (5) that plate (6) is articulated in a brake shoe brake cheek of self-reacting device assembly (4), an end hook portion hook forms an integral body with the Parking torque arm in Parking torque arm (7), the ratchet engaged of other end gib head and self-reacting device assembly (4).
The drum brake mechanism of self-regulated during 2, according to the described Parking of claim is characterized in that: allot plate (6) certainly and be connected with another brake shoe brake cheek by extension spring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031349226A CN1528626A (en) | 2003-09-28 | 2003-09-28 | Self-adjusting drum brake at parking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031349226A CN1528626A (en) | 2003-09-28 | 2003-09-28 | Self-adjusting drum brake at parking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1528626A true CN1528626A (en) | 2004-09-15 |
Family
ID=34286213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031349226A Pending CN1528626A (en) | 2003-09-28 | 2003-09-28 | Self-adjusting drum brake at parking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1528626A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101460759B (en) * | 2006-06-01 | 2012-10-10 | 汽车产品意大利（Sv）有限责任公司 | Drum brakes |
| CN103899685A (en) * | 2014-04-22 | 2014-07-02 | 重庆市璧山宏向汽配有限公司 | Self-gap-adjusting assembly of draw-arm-type brake |
| CN103899690A (en) * | 2014-04-22 | 2014-07-02 | 重庆市璧山宏向汽配有限公司 | Pull-arm-type brake with gap self-adjusting function |
-
2003
- 2003-09-28 CN CNA031349226A patent/CN1528626A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101460759B (en) * | 2006-06-01 | 2012-10-10 | 汽车产品意大利（Sv）有限责任公司 | Drum brakes |
| CN103899685A (en) * | 2014-04-22 | 2014-07-02 | 重庆市璧山宏向汽配有限公司 | Self-gap-adjusting assembly of draw-arm-type brake |
| CN103899690A (en) * | 2014-04-22 | 2014-07-02 | 重庆市璧山宏向汽配有限公司 | Pull-arm-type brake with gap self-adjusting function |
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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 |