CN101723048B - Brake block - Google Patents

Abstract

A brake block comprises a first base material body formed by plastic injection molding, wherein one end of the first base material body is provided with a fixing part which is assembled with a clamping seat, and the other end of the first base material body is provided with a combining part which is used for being correspondingly processed with a second base material body made of rubber; the second base material body covers the combining part to form the first and the second base material bodies into a whole, and a brake part for friction deceleration is formed at the other end of the second base material body opposite to the first base material body. The brake pad is made of rubber, and the fixing seat is made of plastic, so that the brake pad is easy to demould, is convenient to assemble, and is not easy to fall off or break.

Description

brake pads

technical field

The invention relates to a brake block for a bicycle, in particular to a composite brake block which uses rubber as a brake block and plastic as a fixing seat, which is easy to remove from the film, facilitates assembly, and is not easy to fall off or break.

Background technique

The bicycle brake system is the key to slow down the speed of the bicycle and maintain the safety of driving. The development and design of the brake system should not only pay attention to the controllability and driving performance of the brake handle, the layout and arrangement of the pipeline, the real-time response of the brake arm and the smoothness of the action. , because the brake pads on the clamp seat are directly rubbed against the wheel frame, the quality of the brake pads maintains the performance of deceleration, so the brake pads are also not to be underestimated.

As shown in Figure 9, the current brake block is integrally formed of rubber material, and its structure is roughly divided into a brake end surface 41 and a combination end surface 42, and a groove 43 is arranged around the brake end surface 41 and the combination end surface 42. The brake block 4 is set into the clip seat 5 with the combined end surface 42, so that the card edge 51 on the clip seat 5 and its own groove 43 are embedded with each other, so that the brake block 4 is fixed on the clip seat 5, and the brake block 4 is fixed on the clip seat 5. 41 friction with the wheel frame;

This kind of brake shoe is made of rubber material through integral molding. However, because the structural appearance of the brake shoe has many depressions and corners, the corresponding barbs and chamfers must be set on the mold, which leads to the production of the mold. It becomes complicated, and the development of integrated molds requires higher costs;

Furthermore, the tolerance of brake pads formed by rubber compression molding is relatively large (the general tolerance is about +-0.3), not only the size of the product is not easy to control, but also it is not easy to assemble with the clamp seat of the current specification; plus the texture of the rubber material It is soft, and it will stick to the master mold when the brake pad is produced and demolded, resulting in product damage and increasing the difficulty of demoulding. In use, the rubber-molded brake pad is also softer and more elastic, and it is easy to be damaged when braking. The deformation caused by the pressing with the wheel frame leads to weakening of the braking force, and the wear of the rubber brake pads in the brake is relatively high. frame contact, damage the brake device;

In addition, during the process of replacing the brake block with a new one, it will be broken due to bending, or gradually deformed after being pressed, and the combination with the clip seat will be weakened, and it will become easy to fall off. This situation often occurs when replacing tires. .

It can be seen that the current one-piece rubber brake pads require high mold manufacturing costs in production, and the tolerance of the product itself is large, resulting in difficult size control and difficult assembly. In addition, the texture is too soft and difficult to demold. It is easy to wear, deform and fall off excessively, so it is still necessary to improve it.

Contents of the invention

The main technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, and provide a brake pad, which uses rubber as the brake pad and plastic as the fixing seat, which is easy to remove the film, facilitates assembly, and is not easy to fall off or break .

The technical solution adopted by the present invention to solve its technical problems is:

A brake block, characterized in that it comprises a first base material formed by plastic injection molding, a fixing part is formed at one end of the first base material, and the fixing part is assembled with a clip seat, and the first base material The other end forms a joint, which is used for corresponding processing with a second base material made of rubber; the second base body covers the joint, so that the first and second base bodies are integrally formed , the other end of the second base body opposite to the first base body is formed with a brake portion for frictional deceleration.

In the aforementioned brake block, the joint portion includes at least one neck section connected to the fixing portion, and a joint end surface connected to the neck section, and the joint end surface is covered by the second base material.

In the aforementioned brake block, the joint portion is provided with several neck sections, and each of the neck sections leaves an empty slot for the second base material to be filled into the coating.

In the above-mentioned brake block, the fixing part is annularly formed with a slot for assembly with the clip seat.

In the aforementioned brake block, the appearances of the first and second base bodies are in sharp contrasting colors.

In the aforementioned brake block, the joint end surface forms an end surface with a high coefficient of friction.

The present invention is composed of the first base material made of plastic and the second base material made of rubber. In the first stage of production, since the plastic is harder than the rubber, it is easy to demould without sticking and undercutting. However, after the first base material is molded, the rubber material is coated on the joint part with mold processing, and by means of two moldings, the mold making of the first and second base materials can be made more efficient. In order to be simple and easy, at the same time, the tolerance of plastic injection molding can be greatly reduced to +-0.05. Therefore, compared with rubber products, the present invention can produce precise dimensions, maintain product quality, and facilitate assembly with clamp holders of established specifications. , and the present invention with more precise tolerance can make a better tight fit with the holder to avoid falling off;

Furthermore, the present invention is compounded of rubber and plastic, and the hard plastic material is used as the fixing part so that it is not easy to be deformed under pressure. In addition to maintaining the combination with the clamp seat and increasing the anti-off effect, the fixing part can prevent The new and old brake pads were broken due to bending when replacing them;

In terms of use, the rubber brake part is not easily deformed or compressed under the support of the fixed part, so it can be in contact with the wheel frame to maintain the effect of friction deceleration, and when the brake part is worn out due to braking , the fixed part can still form a certain protective effect on the clamp seat, and avoid the direct contact between the wheel frame and the clamp seat. If the joint end surface forms a high friction coefficient state, the joint end surface can also produce obvious noise when rubbing against the wheel frame. It can attract users' attention and find that the brake pads need to be replaced. If the appearance of the first and second base materials is made into two distinct colors, the color difference can be used to indicate the wear status of the brake pads, which is more conducive to users' attention The usage status of the brake pads can be replaced in real time.

The beneficial effect of the invention is that the rubber is used as the brake pad, and the plastic is used as the fixing seat, which is easy to remove the film, facilitates assembly, and is not easy to fall off and break.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a three-dimensional exploded schematic diagram of the structure of the brake shoe of the present invention.

Fig. 2 is a perspective view of the structure of the present invention at a lateral angle.

FIG. 3 is a schematic cross-sectional view of the structure of the line segment AB shown in FIG. 2 .

Fig. 4 is a schematic perspective view of the appearance of the present invention.

Fig. 5 is a schematic perspective view of the appearance of another angle of the present invention.

Fig. 6 is a three-dimensional exploded schematic diagram of the structure of the present invention and the clip holder.

Fig. 7 is a schematic perspective view of the appearance of the combination of the present invention and the holder.

FIG. 8 is a schematic cross-sectional view of the structure of the line CD shown in FIG. 7 .

Fig. 9 is a three-dimensional exploded schematic diagram of the structure of the conventional brake shoe and clamp seat.

Explanation of symbols in the figure:

this invention:

First substrate body 1 fixed part 10 socket 101

Joint 11 Neck section 111 Joint end face 112

Empty groove 113 Second substrate body 2 Braking part 20

Holder 3 card edge 31

current technology:

Brake block 4 Brake end face 41 Combined end face 42

Groove 43 Clip seat 5 card edge 51

Detailed ways

The present invention relates to a brake shoe, as shown in Fig. 1 to Fig. 5 (Fig. 3 is a sectional view of line AB shown in Fig. 2), which includes a first base material 1 formed by plastic injection molding. One end of a substrate body 1 forms a fixing portion 10, which is assembled with the holder 3, and the other end of the first substrate body 1 forms a joint portion 11, which is used for connecting with rubber A second substrate body 2 of material corresponds to processing, wherein:

The ring-shaped outer edge of the fixing part 10 is conducive to a socket 101 assembled with the clamp seat 3. The joint part 11 includes at least one neck section 111 connected to the fixing part 10, and a joint end surface connected to the neck section 111. 112. In this embodiment, the joint end surface 112 is formed to have a high friction coefficient. Several neck sections 111 are provided between the fixing part 10 and the joint end surface 112, and there are gaps between the neck sections 111 for the second The substrate body 2 is filled into a covered cavity 113;

The second base body 2 is molded after the first base body 1 is molded, and then molded with the joint portion 11 at the front end of the first base body 1, so that the rubber material is filled into the hollow grooves 113 of the neck sections 111, And the joint end surface 112, the neck section 111 are completely coated, so that the first and second base body 2 are formed into one body, and the other end of the second base body 2 relative to the first base body 1 then forms a friction A brake part 20 for deceleration;

Please refer to Fig. 6 to Fig. 8 (wherein Fig. 8 is a sectional view of the CD line segment shown in Fig. 7), the present invention is to assemble the fixing part 10 and the holder 3, and the slot 101 of the fixing part 10 is Correspondingly embedded with the card edge 31 bent from the outer edge of the clip seat 3, the fixing part 10 is fixed in the clip seat 3;

The present invention is composed of the first substrate body 1 made of plastic and the second substrate body 2 made of rubber. During production, since the texture of plastic is harder than that of rubber, it is easy to demould without sticking and undercutting. However, after the first base body 1 is molded, the rubber material is coated on the joint part 11 by mold processing, and by means of two moldings, the first and second base bodies 1, 2 mold making is simpler and easier, and at the same time, the tolerance of plastic injection molding can be greatly reduced to +-0.05. Therefore, compared with rubber products, the present invention can produce precise dimensions, maintain product quality, and facilitate integration with established The standard clamp seat 3 is assembled, and the present invention with more precise tolerance can make a better tight fit with the clamp seat 3 to avoid falling off;

Furthermore, the present invention is compounded with rubber and plastic, and the hard plastic material is used as the fixed part 10 so that it is not easy to be deformed under pressure. In addition to maintaining the combination with the clip seat 3 and increasing the anti-off effect, the fixed part 10 It can also prevent the old and new brake blocks from being broken due to bending;

In terms of use, the brake part 20 made of rubber is not easily deformed or compressed under the support of the fixed part 10, so it can be in contact with the wheel frame to maintain the effect of friction deceleration, and when the brake part 20 is worn due to braking When it is exhausted, the fixed part 10 can still form a certain protective effect on the clamp seat 3, avoiding the direct contact between the wheel frame and the clamp seat, and the joint end surface 112 with a high friction coefficient will produce obvious noise when rubbing against the wheel frame, which can cause Users pay attention and find that the brake pads need to be replaced. If the appearance of the first and second base materials 1 and 2 are made into two distinct colors, the color difference can be used to indicate the wear status of the brake pads, which is more beneficial to users Pay attention to the usage status of the brake pads to replace them in real time.

Claims (4)

1. brake shoe, it is characterized in that, it comprises one first substrate body of plastics ejection formation, this first substrate body, one end forms a fixed part, this fixed part and holder group are established, the other end of this first substrate body then forms a joint portion, this joint portion be in order to the corresponding processing of one second substrate body of rubber material;

This second substrate body coats the joint portion, makes first, second substrate body be shaped to one, and the other end of relative first substrate body of this second substrate body is formed with the brake portion that friction eceleration is used.

2. brake shoe according to claim 1 is characterized in that: described joint portion comprises at least one cervical part of esophagus of linking to each other with fixed part and combines end face with cervical part of esophagus bonded assembly one that this is coated by second substrate body in conjunction with end face.

3. brake shoe according to claim 2 is characterized in that: described joint portion is provided with several cervicals part of esophagus, respectively leaves a dead slot of inserting coating for second substrate body between those cervicals part of esophagus.

4. brake shoe according to claim 1 is characterized in that: described fixed part ring-type forms for a caulking groove of establishing with the holder group.

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