CN101021239B

CN101021239B - Drum type brake for prolonging friction lining service life

Info

Publication number: CN101021239B
Application number: CN200710066640A
Authority: CN
Inventors: 任天伟; 任秀军
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-09
Filing date: 2007-01-09
Publication date: 2010-05-26
Anticipated expiration: 2027-01-09
Also published as: CN101021239A

Abstract

The present invention relates to an automotive component. In particular, it relates to a method for prolonging service life of brake friction lining tape and its automotive drum-type brake made up byusing said method. It is characterized by that its friction lining tape is tightly covered by external surfaces of two opposite semi-curved shoes, the static end of every shoe is movable fit with fixed shaft mounted in the drum body, its moving end is formed by reset spring and contacted with cam, the rotation of said cam can be used for driving shoes and making them be opened or closed. The position of shaft hole of shoe movable fit with fixed shaft can be changed or the shaft hole position of shoe is fixed, the position of fixed shaft can be changed. The invented method can prolong the service life of friction lining tape by at least above once.

Description

Prolong the ferodo automobile drum brake in working life

Technical field:

The present invention relates to automobile component, particularly prolong the brake friction lining automobile drum brake in working life.

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, the replacement cycle of ferodo 2 is shortened, exist wasting phenomena, the vehicle maintenance expense improves.

Summary of the invention:

The objective of the invention is to overcome the defective of prior art, a kind of brake friction lining automobile drum brake in working life that prolongs is provided.

Technological scheme of the present invention is:

The automobile drum brake in above-mentioned prolongation ferodo working life, mainly reaching the ferodo, the cam that tightly are overlying on the shoes appearance by drum body, shoes forms, two moved ends that are the shoes of semicircle arcuation are relatively contacted by the Returnning spring application of force and cam, the variable position that it is characterized in that the axis hole of the quiet end of shoes that is rotatably assorted with stationary axle changes, and the axle sleeve that is rotatably assorted with stationary axle that is loaded on the quiet end of shoes is made a plurality of independent axle sleeve piece that the position, hole progressively is shifted; Or the quiet end of shoes each be rotatably assorted with the stationary axle that is loaded on removable axle bed, promptly the variable position of the stationary axle that is rotatably assorted with the axis hole of the quiet end of shoes changes.

Described 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.

Described independent axle sleeve piece has the 2-4 piece, and the axis hole position of each axle sleeve piece is outer successively to be moved, 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 present invention compares 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 moves down that changes the outfit, or make on the stationary axle and move, the quiet end of shoes is moved outward, at this moment ferodo has more rubbing surface with drum body madial wall, can continue to use a period of time; After this also can adjust once more the quiet end of shoes is moved outward, make near the ferodo of quiet end also with the friction of drum body madial wall, be worn until whole ferodo, can prolong at least 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 embodiment of the invention 1 structural representation;

Fig. 3 is the structural representation of the quiet end of the embodiment of the invention 2 shoes;

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.

Fig. 7, Fig. 8 are the structural representation of the quiet end of the embodiment of the invention 3 shoes;

The structural representation that Fig. 9 changes for the embodiment of the invention 5 stationary axle variable positions.

Embodiment:

Prolong the automobile drum brake ferodo method in working life, two relative shoes 3 outer surfaces that are the semicircle arcuation tightly cover ferodo 2 in the drum brake drum body 1, shoes 3 quiet ends each be loaded on bulging body 1 stationary axle 7 and be rotatably assorted, the moved end is contacted by Returnning spring 5 application of forces and cam 4, and cam 4 rotates and can order about the 3 moved end b opening and closing of two shoes.So that can be progressively outer the moving in the position of shoes 3 quiet end a is purpose, the variable position of the axis hole of the shoes 3 quiet end a that are rotatably assorted with stationary axle 7 changes, the perhaps axis hole fixed-site of shoes 3 quiet end a, and the variable position that is loaded on bulging body 1 stationary axle 7 changes.When ferodo 2 moved ends are worn and cause brake failure, shoes is pulled down, change axis hole or stationary axle position, shoes 3 quiet ends are moved outward, so that ferodo has more rubbing surface with drum body madial wall, this process can repeat repeatedly, just scraps till the quiet end of ferodo also is worn.

Automobile drum brake of the present invention can have multiple enforcement structure and since shoes 3 in drum body 1 for being symmetrical arranged, following only with direction as shown on the description of shoes structure.

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 quiet end a that are the semicircle arcuation are rotatably assorted with being loaded on bulging body 1 stationary axle 7 fully, and moved end b is contacted by Returnning spring 5 application of forces and cam 4.Be shaped on sleeve block 6 at quiet end a, 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 drive fit in the hole 3.1 but is replaceable, and the order that axle sleeve piece 8 is changed is Fig. 6, Fig. 5, Fig. 4.

Embodiment 3: directly have 2～4 axis holes 3.1 that are rotatably assorted with stationary axle 7 up and down at the quiet end a of shoes 3, these axis holes can separate, and also intersect, and can change the axis hole position from bottom to top, as Fig. 7, shown in Figure 8.

Embodiment 4: based on embodiment 1, 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, pad inserted fill up in axle sleeve piece upper end or lower end or upper and lower end, make the quiet end a of shoes 3 move on to correct position outward.

Embodiment 5: the bulging body corresponding position at shoes 3 quiet end a axis holes has the edge hole, other makes axle bed 7.1 polyliths, differ in stationary axle 7 positions that every axle bed installs, axle bed 7.1 is embedded in drive fit in the bulging body 1 edge hole, also can axle bed 7.1 and drum body 1 be fixed by screw 9.The axis hole fixed-site of shoes 3 like this, the adjustable positions of stationary axle.When the ferodo 2 of moved end b is worn and when causing brake failure, shoes is pulled down, change the stationary axle position, shoes 3 quiet ends are moved outward.

Claims

1. one kind prolongs the ferodo automobile drum brake in working life, mainly reaching the ferodo (2), the cam (4) that tightly are overlying on the shoes appearance by drum body (1), shoes (3) forms, two moved ends that are the shoes (3) of semicircle arcuation are relatively contacted by Returnning spring (5) application of force and cam (4), the variable position that it is characterized in that the axis hole of the quiet end of shoes (3) that is rotatably assorted with stationary axle (7) changes, and the axle sleeve that is rotatably assorted with stationary axle (7) that is loaded on the quiet end of shoes (3) is made a plurality of independent axle sleeve piece (8) that the position, hole progressively is shifted; Or the quiet end of shoes (3) each be rotatably assorted with the stationary axle that is loaded on removable axle bed (7), promptly the variable position of the stationary axle (7) that is rotatably assorted with the axis hole of the quiet end of shoes (3) changes.

2. automobile drum brake according to claim 1, 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).

3. automobile drum brake according to claim 1 and 2, it is characterized in that described independent axle sleeve piece (8) has the 2-4 piece, the axis hole of each axle sleeve piece (8.1) position is outer successively to be moved, 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).

4. automobile drum brake according to claim 2, 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.

5. automobile drum brake according to claim 1, it is characterized in that having the edge hole at the bulging body corresponding position of the quiet end axis hole of shoes (3), other makes axle bed (7.1) polylith, differ in stationary axle (7) position that every axle bed installs, axle bed (7.1) is embedded in drive fit in bulging body (1) the edge hole, or by screw (9) that axle bed (7.1) and drum body (1) is fixing.