CN203161907U - Automobile drum brake - Google Patents
Automobile drum brake Download PDFInfo
- Publication number
- CN203161907U CN203161907U CN 201320118349 CN201320118349U CN203161907U CN 203161907 U CN203161907 U CN 203161907U CN 201320118349 CN201320118349 CN 201320118349 CN 201320118349 U CN201320118349 U CN 201320118349U CN 203161907 U CN203161907 U CN 203161907U
- Authority
- CN
- China
- Prior art keywords
- brake
- return
- automobile drum
- boss
- bosses
- 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 - Fee Related
Links
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- Braking Arrangements (AREA)
Abstract
The utility model relates to an automobile drum brake, and aims to provide an automobile drum brake which is accurate in brake shoe return and convenient in brake gap adjustment. The automobile drum brake comprises a brake bottom plate, an expander arranged on the brake bottom plate, two brake shoes and a return support saddle; one end of each brake shoe is clamped in a clamping groove in the end part of the expander; a return spring is connected between the two brake shoes; and a boss is formed at the other end of each brake shoe, and corresponding grooves matched with the shapes of the bosses are formed in the end part of the return support saddle. Preferably, the bosses are semicircular bosses, the grooves are semicircular grooves, and the radiuses of the semicircular bosses are 10 mm to 25 mm. According to the utility model, the bottom supports of the brake shoes are in the structures of semicircular bosses, and a semicircular hinged support structure is adopted to connect the brake shoes and the return support saddle on the brake bottom plate, so that the brake shoes can return to theoretical positions after being stretched, the gap adjustment is reliable, and the brake performance is stable.
Description
Technical field
The utility model relates to a kind of brake structural, particularly a kind of automobile drum brake structure.
Background technique
At present, the automobile drum brake structure mostly is floating shoe type (brake shoe has relative slip with the strong point), this structure as shown in Figure 1, this kind break generally includes braking bottom board 1, the expander 2(that is arranged on the braking bottom board also claims brake cylinder), two brake shoes 3, one end of brake shoe and expander butt, the other end and return bearing 4 butts that are arranged on the braking bottom board, this return bearing shape is similar to expander 2, perhaps directly replace (the return bearing among the figure is an idle expander) with idle expander, connect by return spring 5 between two brake shoes.During brake shoe, the two-end structure of brake shoe is identical, is the rectangle end face in design, and an end is embedded in the draw-in groove of expander end, and the other end directly and the end butt of return bearing.Because this kind structural feature and foozle, after opening, brake shoe is difficult to get back to theoretical initial position, and brake clearance is adjusted difficulty, and the product performance instability causes easily that braking is dawdled, problem such as seized, has a strong impact on quality of product.
The model utility content
At deficiency of the prior art, it is accurate that the utility model aims to provide a kind of brake shoe return, the automobile drum brake that brake clearance is easy to adjust.
In order to address the above problem, this kind automobile drum brake comprises: braking bottom board, be arranged on expander on the braking bottom board, two brake shoes and return bearing; One end of brake shoe is connected in the draw-in groove on the expander end, connects by return spring between two brake shoes,
This automobile drum brake is characterised in that: the other end of brake shoe forms boss, and the end of return bearing is provided with and the corresponding groove of boss shape.
Preferably, described boss is semicircle boss, and described groove is semi-circular recesses.The radius of described semicircle boss is 10mm～25mm.
The beneficial effects of the utility model are: the boss structure of semi-circle is made at brake shoe bottom support place, and the return bearing place on brake shoe and the braking bottom board adopts the form of semicircle hinged support.Like this, in the break working procedure, brake shoe is only done around the strong point and is relatively rotated, and does not slide relatively.Can get back to theoretical position after brake shoe opens, the gap adjustment is reliable, and braking ability is stable.
Description of drawings
Fig. 1 is the structural representation of automobile drum brake of the prior art;
Fig. 2 is the structural representation of automobile drum brake of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 2, this kind automobile drum brake comprises braking bottom board 1, is arranged on expander 2 on the braking bottom board, two brake shoes 3 and return bearing 4.Connect by two return springs 5 between two brake shoes, an end of each brake shoe 3 is connected in the draw-in groove on the expander end, and the other end forms semicircle boss 31, and the end of return bearing 4 is provided with and the corresponding semi-circular recesses 41 of boss shape.When this brake drum was not worked, the boss on the brake shoe bottom was embedded in the groove on the return bearing.Preferably, the radius of this semicircle boss is 10mm～25mm, and corresponding, the radius of this semi-circular recesses also is 10mm～25mm.
The boss structure of semi-circle is made at brake shoe bottom support place, and the return bearing place on brake shoe and the braking bottom board adopts the form of semicircle hinged support.Like this, in the break working procedure, brake shoe is only done around the strong point and is relatively rotated, and does not slide relatively.Can get back to theoretical position after brake shoe opens, the gap adjustment is reliable, and braking ability is stable.
Claims (3)
1. automobile drum brake comprises: braking bottom board (1), be arranged on expander (2), two brake shoes (3) and return bearing (4) on the braking bottom board; One end of brake shoe (3) is connected in the draw-in groove on the expander end, connects by return spring (5) between two brake shoes,
This automobile drum brake is characterised in that: the other end of brake shoe (3) forms boss (31), and the end of return bearing (4) is provided with and the corresponding groove of boss shape (41).
2. automobile drum brake according to claim 1, it is characterized in that: described boss (31) is semicircle boss, and described groove (41) is semi-circular recesses.
3. automobile drum brake according to claim 2, it is characterized in that: the radius of described semicircle boss is 10mm～25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320118349 CN203161907U (en) | 2013-03-15 | 2013-03-15 | Automobile drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320118349 CN203161907U (en) | 2013-03-15 | 2013-03-15 | Automobile drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161907U true CN203161907U (en) | 2013-08-28 |
Family
ID=49023093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320118349 Expired - Fee Related CN203161907U (en) | 2013-03-15 | 2013-03-15 | Automobile drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203161907U (en) |
-
2013
- 2013-03-15 CN CN 201320118349 patent/CN203161907U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20190315 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |