CN203009658U - Drum brake - Google Patents
Drum brake Download PDFInfo
- Publication number
- CN203009658U CN203009658U CN 201220724674 CN201220724674U CN203009658U CN 203009658 U CN203009658 U CN 203009658U CN 201220724674 CN201220724674 CN 201220724674 CN 201220724674 U CN201220724674 U CN 201220724674U CN 203009658 U CN203009658 U CN 203009658U
- Authority
- CN
- China
- Prior art keywords
- brake
- drum
- support block
- brake shoe
- brake shoes
- 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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- Braking Arrangements (AREA)
Abstract
The utility model relates to a drum brake which comprises a brake drum and a pair of brake shoes. Reset springs are respectively connected between upper portions of the brake shoes and between lower portions of the brake shoes. Brake branch pumps are arranged between upper ends of the brake shoes, and support blocks are arranged between lower ends of the brake shoes. Work surfaces of the left and right ends of the support blocks, contacting with the brake shoes, are symmetric oblique surfaces, namely the left and right end faces are splayed. The drum brake can effectively alleviate wear of the brake shoes.
Description
Technical field
The utility model relates to a kind of break, is specifically related to drum brake.
Background technique
Drum brake is generally as the car rear brake, and the advantage of comparing it with disk type braker is that brake petal is applied the braking force that certain power produces is larger.Drum brake is generally with the wedging action, thereby the braking force that produces than disk type braker is larger.
Existing drum brake, first brake drum and wheel rate are linked together, realize brake drum and wheel synchronous rotary, be rigidly connected brake backing plate and back axle fixing again, when needs were braked, the break wheelcylinder piston promoted brake shoe, at this moment, the upper end of brake shoe first contacts with the brake drum of rotation, and shoe plate down moves and makes whole shoe plate rubbing surface and brake drum applying produce braking force subsequently.When needs releasing brake power, the break wheelcylinder piston is by the hydraulic drive brake petal, and at this moment, brake shoe is return under break up and down returning pull-spring effect, and brake shoe and brake drum are separated, move on brake shoe, thus brake off.
Existing drum brake and patent publication No. are that the hand brake that is used for automobile of CN2132029Y is similar, when wanting releasing brake power, in the return process of brake shoe under break up and down returning pull-spring effect, because of the support block left and right end face elongation line of brake shoe bottom vertical with the horizontal center line of brake shoe, thereby do not make the effect that moves on brake shoe, moving past journey on brake shoe is to rotate to force by brake drum to move separation on brake shoe fully, and this situation can cause brake shoe wearing and tearing quickening, brake shoe partial wear, the unequal problem of wearing and tearing.
The model utility content
The purpose of this utility model is to provide a kind of drum brake that can effectively slow down the brake shoe wearing and tearing.
A kind of drum brake described in the utility model, comprise brake drum, a pair of brake shoe, be connected with respectively return spring between the top of described brake shoe and between the bottom, the break wheel cylinder is set between the upper end, be provided with support block between the lower end, the working surface that the two ends, left and right of described support block contact with brake shoe is symmetrical inclined-plane, and namely two end faces in left and right are splayed shape.
Described support block is seen as the trapezoidal block structure that is provided with chamfering from the plane, the middle part of this support block is provided with two riveted holes that are connected with brake backing plate, and the bottom of described support block also is provided with semicircular auxiliary hole.
The utlity model has following advantage:
1) because support block is the trapezoidal block structure that is provided with chamfering, when brake off, the trend that support block moves brake shoe on having, thus delay brake shoe wearing and tearing in use, reduce brake shoe partial wear and the uneven problem of wearing and tearing.
When 2) using the utility model, more convenient.
Description of drawings
Fig. 1 is the structural representation that the utility model omits brake drum;
Fig. 2 is the structural representation of support block in Fig. 1.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
Referring to drum brake illustrated in figures 1 and 2, it comprises brake drum, a pair of brake shoe 2, be connected with respectively return spring 3,4 between the top of described brake shoe 2 and between the bottom, the break wheel cylinder is set between the upper end, be provided with support block 1 between the lower end, the working surface that the two ends, left and right of described support block 1 contact with brake shoe 2 is symmetrical inclined-plane, and namely two end faces in left and right are splayed shape
Described support block 1 is seen as the trapezoidal block structure that is provided with chamfering from the plane, the middle part of this support block 1 is provided with two riveted holes 5 that are connected with brake backing plate, and the bottom of described support block 1 also is provided with semicircular auxiliary hole.
Working principle of the present utility model:
When braking was removed, in brake shoe return process, thereby brake shoe up moved along the support block inclined-plane brake shoe is separated with brake drum more smoothly, thus brake off.
Claims (2)
1. drum brake, comprise brake drum, a pair of brake shoe (2), be connected with respectively return spring (3,4) between the top of described brake shoe (2) and between the bottom, the break wheel cylinder is set between the upper end, be provided with support block (1) between the lower end, it is characterized in that: the working surface that the two ends, left and right of described support block (1) contact with brake shoe (2) is symmetrical inclined-plane, and namely two end faces in left and right are splayed shape.
2. drum brake according to claim 1, it is characterized in that: described support block (1) is seen as the trapezoidal block structure that is provided with chamfering from the plane, the middle part of this support block (1) is provided with two riveted holes (5) that are connected with brake backing plate, and the bottom of described support block (1) also is provided with semicircular auxiliary hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220724674 CN203009658U (en) | 2012-12-25 | 2012-12-25 | Drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220724674 CN203009658U (en) | 2012-12-25 | 2012-12-25 | Drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203009658U true CN203009658U (en) | 2013-06-19 |
Family
ID=48601255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220724674 Expired - Lifetime CN203009658U (en) | 2012-12-25 | 2012-12-25 | Drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203009658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819224A (en) * | 2015-05-18 | 2015-08-05 | 安徽江淮汽车股份有限公司 | Drum brake assembly |
-
2012
- 2012-12-25 CN CN 201220724674 patent/CN203009658U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819224A (en) * | 2015-05-18 | 2015-08-05 | 安徽江淮汽车股份有限公司 | Drum brake assembly |
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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 |