CN200985972Y

CN200985972Y - Vehicle drum brake

Info

Publication number: CN200985972Y
Application number: CN 200620141226
Authority: CN
Inventors: 任天伟; 任秀军
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-20
Filing date: 2006-12-20
Publication date: 2007-12-05
Anticipated expiration: 2016-12-20

Abstract

The utility model relates to a vehicle part, in particular to a drum brake which is suitable for medium type vehicle or a heavy duty vehicle, which is essentially composed of a drum body (1), a horseshoe (3) as well as a friction lining belt (2) and a cam (4), the standing parts of the two semicircle arc shape horseshoes (3) are respectively rotatedly matched with a fixed axle (7) which is arranged on a shaft housing block, the leading parts are contradicted with the cam (4) by the force of an offsetting spring (5), the position of an axle hole of the horseshoe (3) which is rotatedly matched with the fixed axle (7) can be changed. When the brake of the utility model is used for a time, the friction ling belt will be fretted thereby resulting in the ineffective brake, the horseshoe can be unloaded and replaced by a backup shaft housing block with a down moved axle hole thereby upward moving the whole horseshoe, providing more rubbing surfaces for inside walls of the friction lining belt and the drum body for a sequentially use, extending the service of the friction lining belt more than one time and lowering the integrated cost.

Description

A kind of automobile drum brake

Technical field:

The utility model relates to a kind of automobile component, in particularly a kind of being suitable for, the drum brake of heavy-duty car.

Background technique:

In traditional, heavy-duty car generally adopts drum brake, its typical structure as shown in Figure 1, mainly reaching the ferodo 2, the cam 4 that tightly are overlying on the shoes appearance by drum body 1, shoes 3 forms, two relative shoes 3 one ends that are the semicircle arcuation respectively are rotatably assorted with being loaded on bulging body 1 stationary axle 7, and the other end is contacted by Returnning spring 5 application of forces and cam 4.Automobile is when brake, and cam 4 rotates shoes 3 is opened, and ferodo 2 forces wheel decelerates or stall with drum body 1 madial wall friction.Because radial displacement does not take place and does not produce friction in the quiet end of shoes 3, has only 2 pairs of brakes of ferodo generation effect of moved end, thereby ferodo 2 has only the moved end to be worn, the radial thickness of ferodo 2 wearing and tearing does not wait, exist wasting phenomena, the replacement cycle of ferodo 2 is shortened, and cost of transportation improves.

Summary of the invention:

The purpose of this utility model provides a kind of automobile drum brake that prolongs the ferodo replacement cycle.

The technical solution of the utility model is: automobile drum brake, mainly reaching the ferodo, the cam that tightly are overlying on the shoes appearance by drum body, shoes forms, two be relatively the semicircle arcuation shoes quiet end each be loaded on axle sleeve piece stationary axle and be rotatably assorted, the moved end is contacted by the Returnning spring application of force and cam, it is characterized in that the variable position of the axis hole of the shoes that is rotatably assorted with stationary axle changes.

The axle sleeve that above-mentioned shoes and stationary axle are rotatably assorted is made a plurality of independent axle sleeve piece that the position, hole moves down gradually.

Above-mentioned axle sleeve is packaged in sleeve block, is shaped on two cavity volumes that cooperate with the axle sleeve piece of being separated by in the sleeve block, sleeve block and axle sleeve piece is fixed by screw by cover plate behind the axle sleeve piece of packing into.

Above-mentioned independent axle sleeve piece has the 2-3 piece, and the axis hole position of each axle sleeve piece is moved on successively, and the quiet end of shoes has the edge hole identical with axle sleeve piece peripheral shape, and the axle sleeve piece is embedded in the hole.

Owing to adopt said structure, the utility model is compared with original break, has following beneficial effect: after break uses a period of time, the ferodo moved end is worn and causes brake failure, shoes can be pulled down, the standby axle sleeve piece that the axis hole position that changes the outfit moves down moves shoes on the whole, at this moment ferodo has more rubbing surface with drum body madial wall, can continue to use a period of time; After this standby axle sleeve piece that the axis hole position further moves down that also can change the outfit once more, make near the ferodo of quiet end also with the friction of drum body madial wall, be worn until whole ferodo, can prolong the working life of ferodo more than one times, overall cost reduces.

Description of drawings:

Fig. 1 is the structural representation of existing break;

Fig. 2 is the utility model example structure schematic representation;

Fig. 3 is the structural representation of the quiet end of another embodiment's shoes of the utility model;

Fig. 4～Fig. 6 be respectively with Fig. 3 in edge hole shape cooperates, differ in the axis hole position axle sleeve piece plan view.

Embodiment:

Embodiment 1: referring to Fig. 2, a kind of automobile drum brake, mainly reaching the ferodo 2 and the cam 4 that tightly are overlying on the shoes appearance by drum body 1, shoes 3 forms, two relative shoes 3 one ends (quiet end) that are the semicircle arcuation respectively are rotatably assorted with being loaded on bulging body 1 stationary axle 7, and the other end (moved end) is contacted by Returnning spring 5 application of forces and cam 4.Be shaped on sleeve block 6 at quiet end, be shaped on two cavity volumes that cooperate with axle sleeve piece 8 of being separated by in this sleeve block, axle sleeve piece 8 is inserted in the sleeve block cavity volume of packing into behind the stationary axle 7, sleeve block 6 and axle sleeve piece 8 is fixing by cover plate 11 then by screw 9 and screw 10.Axle sleeve piece 8 can prepare polylith, and every axis hole position is different up and down; Pull down the axle sleeve piece of replaceable different axis holes position, cover plate 11 back.

Embodiment 2: referring to Fig. 3～Fig. 6, quiet end at shoes 3 has the edge hole 3.1 identical with axle sleeve piece 8 peripheral shapes, 3 of axle sleeve piece 8 preparations, every axis hole 8.1 positions are different up and down, axle sleeve piece 8 is embedded in the interior drive fit in hole (3.1) but is replaceable, and the order of the replacing of axle sleeve piece 8 is Fig. 6, Fig. 5, Fig. 4.

Embodiment 3: directly the quiet end at shoes 3 has 2～3 axis holes that are rotatably assorted with stationary axle 7 up and down, can change the axis hole position from bottom to top.

Embodiment 4: based on embodiment 1, and axle sleeve piece 8 preparation polyliths, every axis hole position is identical, but axle sleeve piece 8 long to size less than the length of sleeve block content cavity to size, pad is inserted for pad in its remaining gap, can be as required, and pad inserted fill up in axle sleeve piece upper end or lower end or upper and lower end.

Claims

1, a kind of automobile drum brake, mainly reaching the ferodo (2), the cam (4) that tightly are overlying on the shoes appearance by drum body (1), shoes (3) forms, two be relatively the semicircle arcuation shoes (3) quiet end each be loaded on axle sleeve piece stationary axle (7) and be rotatably assorted, the moved end is contacted by Returnning spring (5) application of force and cam (4), it is characterized in that the variable position of the axis hole of the shoes (3) that is rotatably assorted with stationary axle (7) changes.

2, automobile drum brake according to claim 1 is characterized in that axle sleeve that shoes (3) and stationary axle (7) are rotatably assorted makes a plurality of independent axle sleeve piece (8) that the position, hole is moved on gradually.

3, automobile drum brake according to claim 2, it is characterized in that axle sleeve piece (8) is loaded in the sleeve block (6), be shaped on two cavity volumes that cooperate with axle sleeve piece (8) of being separated by in the sleeve block (6), axle sleeve piece (8) back of packing into is fixing with sleeve block (6) and axle sleeve piece (8) by screw by cover plate (11).

4, automobile drum brake according to claim 2, it is characterized in that described independent axle sleeve piece (8) has the 2-3 piece, the axis hole of each axle sleeve piece (8.1) position is moved on successively, the quiet end of shoes (3) has the edge hole (3.1) identical with axle sleeve piece (8) peripheral shape, and axle sleeve piece (8) is embedded in the hole (3.1).

5, automobile drum brake according to claim 3, it is characterized in that preparing the identical axle sleeve piece 8 in every axis hole position of polylith, axle sleeve piece 8 long to size less than the length of sleeve block content cavity to size, pad is inserted for pad in its remaining gap, as required, pad is inserted filled up in axle sleeve piece upper end or lower end or upper and lower end.

6, automobile drum brake according to claim 1 is characterized in that direct quiet end at shoes 3 has 2～3 axis holes that are rotatably assorted with stationary axle 7 up and down.