CN203009655U - Automobile drum brake - Google Patents
Automobile drum brake Download PDFInfo
- Publication number
- CN203009655U CN203009655U CN 201220596726 CN201220596726U CN203009655U CN 203009655 U CN203009655 U CN 203009655U CN 201220596726 CN201220596726 CN 201220596726 CN 201220596726 U CN201220596726 U CN 201220596726U CN 203009655 U CN203009655 U CN 203009655U
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- CN
- China
- Prior art keywords
- arc
- brake
- shaped
- friction linings
- friction
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses an automobile drum brake. The automobile drum brake comprises a brake soleplate (1) and two brake shoes (2) which are symmetrically arranged on the brake soleplate bilaterally, wherein the brake shoes (2) comprise arc-shaped shoe plates (2a) and arc-shaped web plates (2b) which are connected with the inner surfaces of the arc-shaped shoe plates (2a); friction linings (3) which have similar shapes as the arc-shaped shoe plates are fixed on the outer surfaces of the arc-shaped shoe plates (2a); the arc-shaped friction linings (3) have different thicknesses; and the middles of the arc-shaped friction linings (3) are the thickest, and the arc-shaped friction linings (3) gradually become thinner towards the two end parts thereof. When the automobile drum brake brakes, the friction linings are uniformly stressed, so that the brake shoes are not likely to deflect and the braking process is relatively steady; and the friction linings have relatively high utilization ratio and relatively long service life.
Description
Technical field
The utility model belongs to the automobile brake technical field, relates in particular to a kind of drum brake.
Background technique
Drum brake is a kind of comparatively traditional break, and because it has low price, braking ability is good etc., and advantage still is widely used.Traditional drum brake generally comprises base plate, two brake shoes, the compositions such as camshaft and Returnning spring; End at brake shoe is provided with roller.Drum brake is in braking during work, and the roller that is promoted the brake shoe end by camshaft expands outwardly brake shoe, and compressing support rise brake hub inboard produces the friction facing in brake hub internal surface and the brake shoe outside and rubs, and forces wheel to stop operating.The friction facing of the outer round surface of traditional drum brake brake shoe is all uniform thickness.Because brake shoe is expanded outwardly by the strong point, the uniform thickness friction facing that is arranged on brake shoe external arc surface does not fit with the brake drum internal surface simultaneously.During braking, the internal surface area of contact of friction facing and wheel hub is less, friction facing discontinuity, the easy sideslip of brake shoe; Friction facing near outermost edge position, left and right easily is depleted simultaneously, can cause the premature failure of friction facing, and working life is lower.
Summary of the invention
The purpose of this utility model is the shortcoming that overcomes prior art, and a kind of higher automobile drum brake of good braking ability, working life that possesses is provided.
For solving the problems of the technologies described above, concrete technological scheme of the present utility model is as follows:
A kind of automotive brake comprises braking bottom board and two brake shoes that are symmetrically arranged on described braking bottom board; Described brake shoe comprises arc hoof plate and the arc-shaped webs that is connected with described arc hoof plate internal surface;
It is characterized in that: be fixed with the friction facing with the profiling of described arc hoof plate phase on described arc hoof plate outer surface, the variable thickness of described arc friction facing; Described arc friction facing intermediate portion thickness is maximum, and successively decreases to two end part.
Further, the friction facing on described brake shoe arc hoof plate outer surface is two independently friction facings, leaves the gap between described two friction facings; The end thickness that described two friction facings join is larger, and successively decreases to the other end.
The utility model has the advantage of: (1) brake bush stress equalization, brake shoe is difficult for sideslip, and is comparatively steady during brake; (2) friction facing has higher utilization ratio, and working life is longer.
Description of drawings
Fig. 1 is general structure schematic diagram of the present utility model.
Fig. 2 is the utility model preferred structure friction plate schematic layout pattern.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Shown in Fig. 1 and 2, the utility model comprises braking bottom board 1 and two brake shoes 2 that are symmetrically arranged on described braking bottom board; Described brake shoe 2 comprises arc hoof plate 2a and the arc-shaped webs 2b that is connected with described arc hoof plate 2a internal surface; Be fixed with the friction facing 3 with the profiling of described arc hoof plate phase on described arc hoof plate 2a outer surface, the variable thickness of described arc friction facing 3; Described arc friction facing 3 intermediate portion thickness are maximum, and successively decrease to two end part.
As a kind of preferred structure of the present utility model, the friction facing 3 on described brake shoe arc hoof plate outer surface is two independently brake pad 3a and 3b, leaves the gap between described two friction facing 3a and 3b; The end thickness that described two friction facings join is larger, and successively decreases to the other end.Because friction facing is at when work stress deformation, the gap between two friction facings can effectively prevent between friction facing extruding mutually and damage, extend the working life of friction facing.
The utility model in use, brake shoe expands outwardly along supporting point, because the friction facing on brake shoe arc hoof plate 2a surface is not uniform thickness, the friction facing thickness of edge, break left and right is larger, and gradually up and down two ends reduce; When such layout can make the break braking, friction plate can not contact with the break hub inner surface partly; During braking, friction facing and wheel hub area of contact are larger; The friction facing stress equalization, friction is even, and brake shoe is difficult for sideslip; Friction facing has higher utilization ratio, and arranged long working life.
Claims (2)
1. automobile drum brake comprises braking bottom board (1) and two brake shoes (2) on described braking bottom board of being symmetrically arranged; Described brake shoe (2) comprises arc hoof plate (2a) and the arc-shaped webs (2b) that is connected with described arc hoof plate (2a) internal surface; It is characterized in that: be fixed with the friction facing (3) with the profiling of described arc hoof plate phase on described arc hoof plate (2a) outer surface, the variable thickness of described arc friction facing (3); Described arc friction facing (3) intermediate portion thickness is maximum, and successively decreases to two end part.
2. automobile drum brake according to claim 1, it is characterized in that: the friction facing (3) on described brake shoe arc hoof plate outer surface is two independently friction facings (3a, 3b), leaves the gap between described two friction facings (3a, 3b); The end thickness that described two friction facings join is larger, and successively decreases to the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220596726 CN203009655U (en) | 2012-11-14 | 2012-11-14 | Automobile drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220596726 CN203009655U (en) | 2012-11-14 | 2012-11-14 | Automobile drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203009655U true CN203009655U (en) | 2013-06-19 |
Family
ID=48601252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220596726 Expired - Lifetime CN203009655U (en) | 2012-11-14 | 2012-11-14 | Automobile drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203009655U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927173A (en) * | 2012-11-14 | 2013-02-13 | 江苏汤臣汽车零部件有限公司 | Vehicle drum brake |
-
2012
- 2012-11-14 CN CN 201220596726 patent/CN203009655U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927173A (en) * | 2012-11-14 | 2013-02-13 | 江苏汤臣汽车零部件有限公司 | Vehicle drum brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |