CN102011816A - Disc brake with friction block return structure - Google Patents

Abstract

The invention discloses a disc brake with a friction block return structure, which comprises a brake disc, friction blocks positioned on two side surfaces of the brake disc, a caliper body bracket for supporting the friction blocks, a caliper body for pushing the friction blocks along the axial direction of the brake disc and a friction block pressing plate positioned on one side of the friction blocks, wherein the middle part of the friction block pressing plate is provided with an elastic element which inclines towards the axial line of the brake disc and can elastically deform along the direction vertical to the axial line of the brake disc. The disc brake can lead the friction block to return to the initial position in time after the brake is released, improve the heat dissipation condition and avoid the friction block and the brake disc from being dragged and abraded.

Description

A disc brake with friction block return structure

technical field

The invention relates to a disc brake, in particular to a disc brake with a friction block return structure. the

Background technique

With the advancement of automobile technology and the improvement of public safety awareness, more and more disc brakes are used in automobiles, including heavy-duty tractors, trucks and construction vehicles are equipped with disc brakes. The friction block of the disc brake cooperates with the brake disc. When the vehicle is braked, the disc brake caliper pushes the inner and outer friction blocks supported by the caliper bracket to move towards the brake disc. Squeeze friction produces braking force. the

Generally speaking, after the brake is released, the thrust of the caliper body is canceled, and the force of the friction block pressing the brake disc is also reduced, and the contact between the friction block and the brake disc should be out of contact. But at present, the friction block is actually separated by the rotation of the brake disc to separate the friction block from the brake disc. However, due to the friction between the caliper bracket and the friction block, the separation effect is not obvious, and the vehicle is released. After braking, there is still dragging between the friction block and the brake disc, and the contact between the friction block and the brake disc will also affect its heat dissipation, which will make the temperature of the friction block continue to rise, aggravate the wear of the friction block and brake disc, and cause damage to the brake system. Detrimental effects on dynamic performance. the

Therefore, there is an urgent need to provide an improved disc brake with a friction block return structure to overcome the above-mentioned defects. the

Contents of the invention

The technical problem to be solved by the present invention is to provide a disc brake with a friction block return structure, which can make the friction block return to the initial position in time after the brake is released, improve heat dissipation conditions, and avoid friction between the friction block and the brake disc. grind. the

In order to solve the above technical problems, the present invention provides a disc brake with a friction block return structure, which includes a brake disc, friction blocks located on both sides of the brake disc, and a caliper bracket supporting the friction block 1. The caliper that pushes the friction block along the axis of the brake disc and the friction block pressing plate located on one side of the friction block. The middle part of the friction block pressing plate is provided with a The elastic element is elastically deformable in a direction perpendicular to the axis of the brake disc. the

Compared with the prior art, the middle part of the friction block pressure plate of the disc brake with asymmetric friction block of the present invention is provided with an elastic element inclined towards the axis of the brake disc, and the elastic element can move along the direction perpendicular to the brake disc. The direction of the disc axis is elastically deformed. When braking, the elastic element will be compressed and deformed radially outward along the brake disc. When the brake is released, the elastic element will return and the upper end of the friction block will be taken away from the brake disc. , which is conducive to the separation of the brake disc and the friction block. Because the friction block pressing plate can make the friction block return to the initial position in time after the brake is released, and maintain a certain gap between the friction block and the brake disc, thereby avoiding the dragging of the friction block and the brake disc and improving the heat dissipation conditions, and then can play a role To prevent the peeling of the friction lining caused by long-term high temperature, prolong the service life of the brake disc and friction lining, and improve the performance of the disc brake at the same time. the

Preferably, the elastic element is a reed, which has a simple structure and is easy to manufacture. the

Preferably, the supporting surface where the caliper bracket is in contact with the friction block forms an included angle with the axis direction of the brake disc, and the middle part of the surface where the friction block matches the caliper frame 6 and the A gap is provided between the supporting surfaces of the caliper bracket, and this structure can reduce the contact area between the friction block and the caliper frame, reduce the friction force, and further facilitate the separation of the friction block and the brake disc. The included angle is preferably 3°-15°. the

The present invention will become clearer through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. the

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of a disc brake with a friction block return structure according to the present invention. the

FIG. 2 is an enlarged structural schematic diagram of the friction block pressing plate of the disc brake shown in FIG. 1 . the

Fig. 3 is a schematic diagram of cooperation between the friction block and the caliper bracket of the disc brake shown in Fig. 1 . the

Detailed ways

Embodiments of the present invention will now be described with reference to the drawings in which like reference numerals represent like elements. As mentioned above, the present invention provides a disc brake with a friction block return structure, which can make the friction block return to the initial position in time after the brake is released, improve the heat dissipation conditions, and avoid friction between the friction block and the brake disc. . the

The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. As shown in Figure 1, the disc brake with the friction block return structure of this embodiment includes a brake disc 7, friction blocks 3, 5 located on both sides of the brake disc 7, and supporting the friction blocks 3, 5. The caliper body bracket 6, the caliper body 2 pushing the friction blocks 3, 5 along the axis direction of the brake disc 7, and the friction block pressing plate 4 located on one side of the friction blocks 3, 5. Referring to FIG. 2 , the middle part of the friction block pressing plate 4 is provided with an elastic element 8 inclined toward the axis of the brake disc 7 , and the elastic element 8 can be elastically deformed in a direction perpendicular to the axis of the brake disc 7 . In this embodiment, the elastic element 8 is a reed. The caliper body bracket 6 is rigidly connected to the vehicle axle through bolts, and the friction block pressure plate 4 can be fixed on the caliper body 2 through bolts. Other structures and working principles of the disc brake are well known to those skilled in the art, so a detailed description is omitted here. the

As shown in Figure 3, as a preferred embodiment of the present invention, the supporting surface of the caliper body bracket 6 in contact with the friction blocks 3, 5 forms an included angle A with the axis direction of the brake disc 7, and the A gap 9 is provided between the middle part of the surface of the friction blocks 3 , 5 that cooperate with the pliers bracket 6 and the supporting surface of the pliers bracket 6 . The included angle A is preferably 3°˜15°. Apparently, the surface of the friction block 3 in contact with the pliers support 6 can also be arc-shaped or other similar shapes, as long as the contact area between the friction blocks 3, 5 and the pliers support 6 is reduced. the

When braking, the two friction blocks 3 and 5 move relatively on the supporting surface through the thrust of the caliper body 6, and the inclination angle of the reed in the middle of the friction block pressure plate 4 is compressed and becomes smaller. After the brake is released, the friction block has no caliper body 6 The thrust, under the action of the reed, its upper end is taken away from the brake disc 7. At this time, the contact area between the lower ends of the friction blocks 3 and 5 and the caliper bracket 6 decreases, and the friction force on the contact surface decreases accordingly. In this way, the friction The blocks 3, 5 slide down from the slope, thereby realizing the separation of the brake disc 7 from the friction blocks 3, 5. the

Claims (4)

1. A disc brake with a friction block return structure, comprising a brake disc, friction blocks located on both sides of the brake disc, a caliper bracket supporting the friction block, and The caliper body that pushes the friction block is characterized in that it also includes a friction block pressing plate located on one side of the friction block, and the middle part of the friction block pressing plate is provided with a slant towards the axis of the brake disc, which can be perpendicular to the brake disc. An elastic element that deforms elastically in the direction of the axis of the brake disc. 2. The disc brake according to claim 1, wherein the elastic element is a reed. 3. The disc brake according to claim 1 or 2, characterized in that, the supporting surface of the caliper bracket in contact with the friction block forms an included angle with the axial direction of the brake disc, and the friction A gap is provided between the middle part of the face where the block matches the pliers bracket 6 and the supporting surface of the pliers bracket. 4. The disc brake according to claim 3, characterized in that, the included angle is 3°-15°.

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