CN220924087U - Brake bottom plate and air pressure disc brake - Google Patents

Abstract

The utility model relates to a brake bottom plate, which comprises a bottom plate body, wherein two screw rod perforations are formed in the bottom plate body; a middle boss is formed on the bottom plate body between the two screw rod perforation holes, and a positioning protrusion used for limiting the bottom of the return spring to move is formed on the middle boss. The pneumatic disc brake comprises a brake caliper body, a bottom plate, a return spring and a supporting seat, wherein a skirt edge bulge of the bottom plate is fixedly connected with the brake caliper body, and the upper end of a guide cylinder of the bottom plate is connected with a check ring; connecting screws are arranged at two ends of the supporting seat, and the lower ends of the connecting screws penetrate through the bottom plate and then are connected with the pushing block; the lower end of the return spring is positioned in the inner groove of the bottom plate, and the upper end of the return spring is abutted against the supporting seat. Through the concave inner groove protruding outwards and concave inwards on the bottom plate body, the integral deformation resistance of the bottom plate is improved, and the deformation of the bottom plate can be reduced under the high-strength working condition. The stress of the connecting screw is reduced, and the connecting screw and the brake caliper body are prevented from loosening.

Description

Brake bottom plate and air pressure disc brake

Technical Field

The utility model relates to the field of brakes, in particular to a brake bottom plate and a pneumatic disc brake.

Background

With the related regulations of the national traveling vehicle matched with the brakes, the pneumatic disc brake is applied to more and more axles and vehicle types, and meanwhile, the functions and the requirements of the whole vehicle are increased, and the corresponding requirements on the performance and the application range of the disc brake are higher.

Currently, in order to facilitate the inner cavity processing of a brake caliper body, a bottom plate and a brake caliper body are commonly connected by screws to form a sealing mode for a pneumatic disc brake; as shown in fig. 1, screw perforations are formed around the bottom plate 1, two screw perforations are formed on the bottom plate, a supporting part is positioned at the lower end of the return spring between the two screw perforations, and a plurality of connecting screws penetrate through the screw perforations to connect the bottom plate and the brake caliper body in a sealing manner; however, as the air pressure of the whole vehicle is increased, the stress of the brake is larger, when the brake works, the supporting seat is pressed down to compress the return spring, and the force is transmitted to the bottom plate assembly to deform the bottom plate; thereby make the connecting screw atress increase between brake caliper body and the bottom plate, connecting screw exists not hard up and drops the risk, influences the performance of stopper to the bottom plate takes place to form and still can lead to increasing supporting seat and air chamber ejector pin stroke, increases the gas consumption of whole car when braking.

In summary, the bottom plate structure in the traditional brake is unreasonable, and the bottom plate is easy to deform during high-strength working, so that the problems of loosening between the bottom plate and the brake caliper body, increasing the stroke of the supporting seat and the air chamber ejector rod and increasing the air consumption of the whole brake are caused.

Disclosure of Invention

The utility model aims to solve the technical problems that: the brake bottom plate and the air pressure disc brake are provided, and the problems that the strength of the bottom plate is not easy to deform, and the connecting screw between the bottom plate and the brake caliper body is easy to loosen in the past are solved.

The technical scheme adopted for solving the technical problems is as follows:

First aspect

The bottom plate of the brake comprises a bottom plate body, wherein two screw rod through holes are formed in the bottom plate body; a middle boss is formed on the bottom plate body between the two screw rod perforation holes, and a positioning protrusion used for limiting the bottom of the return spring to move is formed on the middle boss.

Further, an inner groove is formed on the middle boss, the positioning protrusion is located in the inner groove, and the lower end of the return spring is located in the inner groove.

Further, a circle of skirt edge bulges are formed around the bottom plate body, and a plurality of screw perforation holes are distributed on the skirt edge bulges.

Further, a guide cylinder is formed on the screw perforation, and a circle of clamping ring matched with the check ring is formed at the upper end of the guide cylinder.

Second aspect

The air pressure disc brake comprises a brake caliper body, a bottom plate, a return spring and a supporting seat; the bottom plate adopts the brake bottom plate; the skirt edge bulge of the bottom plate is fixedly connected with the brake caliper body, the upper end of the guide cylinder of the bottom plate is connected with a check ring, and the check ring is suitable for being abutted with the lower end of the supporting seat; the support seat is positioned above the bottom plate, connecting screws are arranged at two ends of the support seat, and the lower ends of the connecting screws penetrate through the bottom plate and then are connected with the pushing block; the return spring is arranged between the supporting seat and the bottom plate, the lower end of the return spring is positioned in the inner groove of the bottom plate, and the upper end of the return spring is abutted against the supporting seat.

The beneficial effects of the utility model are as follows: according to the brake bottom plate, the inner grooves which are convex and concave on the bottom plate body improve the integral deformation resistance of the bottom plate, and the deformation of the bottom plate can be reduced under the high-strength working condition.

After the bottom plate of the pneumatic disc brake is adopted, the deformation resistance of the bottom plate is enhanced, so that the stress of the connecting screw is reduced, and the looseness between the connecting screw and the brake caliper body is prevented.

Meanwhile, the strokes of the supporting seat assembly and the air chamber ejector rod are reduced, the air consumption of the whole vehicle during braking is reduced, and the cost is saved.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of a conventional backplane;

FIG. 2 is a schematic illustration of a brake spider of the present utility model;

FIG. 3 is a schematic illustration of the return spring engaging the base plate;

FIG. 4 is a schematic view of a base plate with six screw holes;

FIG. 5 is a perspective view of the pneumatic disc brake of the present utility model;

FIG. 6 is a semi-sectional view of an air disc brake of the present utility model;

Wherein,

1. The bottom plate, 11, the bottom plate body, 12, the screw perforation, 13, the middle boss, 14, the positioning protrusion, 15, the inner groove, 16, the skirt edge protrusion, 17, the screw perforation, 18, the guide cylinder, 19 and the snap ring;

2. The device comprises a supporting seat, a connecting screw, a return spring, a retainer ring, a pushing block, a sealing element and a pushing block, wherein the supporting seat, the connecting screw, the return spring, the retainer ring, the pushing block and the sealing element are arranged in sequence;

Detailed Description

The utility model will now be further described with reference to the accompanying drawings. These drawings are simplified schematic views illustrating the basic structure of the present utility model by way of illustration only, and thus show only the constitution related to the present utility model.

Example 1

As shown in fig. 2 and 3, the brake bottom plate comprises a bottom plate body 11, wherein two screw through holes 12 are formed in the bottom plate body 11; a middle boss 13 is formed on the base plate body 11 between the two screw through holes 12, and a positioning protrusion 14 for limiting the bottom movement of the return spring 4 is formed on the middle boss 13.

In this embodiment, the middle boss 13 is formed on the base plate body 11 by a punching process.

Specifically, an inner groove 15 is formed on the middle boss 13, the positioning protrusion 14 is located in the inner groove 15, and the lower end of the return spring 4 is located in the inner groove 15.

In this embodiment, the inner groove 15 has a circular structure, and the inner groove 15 is also formed by a stamping process.

As shown in fig. 3, the lower end of the return spring 4 abuts in the inner groove 15.

Specifically, a circle of skirt edge protrusions 16 is formed around the bottom plate body 11, and a plurality of screw through holes 17 are distributed on the skirt edge protrusions 16.

Skirt boss 16 is formed by a stamping process.

In the brake bottom plate of the embodiment, the strength of the bottom plate is ensured due to the addition of the middle convex table 13 and the inner groove 15, so that the number of screw through holes 17 on the skirt bulge 16 can be reduced by 1-2.

Specifically, as shown in fig. 1, the number of screw perforations on the conventional bottom plate is 8, but in the bottom plate of the utility model, due to the addition of the middle convex table 13 and the inner groove 15, the bottom plate can be ensured not to deform at the lower end of the clamp body under the condition that the number of screw perforations 17 on the skirt bulge 16 of the bottom plate 1 is changed to 6, and the bottom plate with six screw perforations is shown in fig. 4.

Specifically, a guide tube 18 is formed on the screw perforation 12, and a ring 19 for matching with the retainer ring 5 is formed at the upper end of the guide tube 18.

Specifically, the cross section of the snap ring 19 is in an L-shaped structure. The snap ring 19 is adapted to cooperate with the retainer ring 5 to limit the disengagement of the retainer ring 5 from the guide 18.

In this embodiment, the snap ring 19 is integrally formed with the guide tube 18 by press molding, and the guide tube 18 is integrally formed with the base plate body 11 by press molding.

According to the brake bottom plate, the deformation resistance of the whole bottom plate 1 is improved through the concave inner groove 15 protruding outwards and concavely on the bottom plate body 11, and the deformation of the bottom plate 1 can be reduced under the high-strength working condition.

Example two

As shown in fig. 5 and 6, a pneumatic disc brake comprises a brake caliper body (not shown), a base plate 1, a return spring 4 and a support base 2; the bottom plate 1 adopts the brake bottom plate 1; the skirt edge bulge 16 of the bottom plate 1 is fixedly connected with the brake caliper body, the upper end of the guide tube 18 of the bottom plate 1 is connected with the retainer ring 5, and the retainer ring 5 is suitable for being abutted against the lower end of the supporting seat 2; the supporting seat 2 is positioned above the bottom plate 1, connecting screws 3 are arranged at two ends of the supporting seat 2, and the lower ends of the connecting screws 3 penetrate through the bottom plate 1 and then are connected with pushing blocks 6; the return spring 4 is arranged between the supporting seat 2 and the bottom plate 1, the lower end of the return spring 4 is positioned in the inner groove 15 of the bottom plate 1, and the upper end of the return spring is abutted against the supporting seat 2.

The connecting screw passes through the screw perforation 17 on the skirt bulge 16 of the bottom plate 1 and then is fixedly connected with the brake caliper body.

Specifically, a sealing element 7 is arranged between the push block 6 and the guide cylinder 18 of the bottom plate 1, and the sealing element 7 is used for improving the tightness between the push block 6 and the bottom plate 1.

The connecting screw rod 3 and the supporting seat 2 form threaded fit, the push block 6 is fixed at the lower end of the connecting screw rod 3, when in operation, the supporting seat 2 moves downwards under the force, the two connecting screw rods 3 drive the push block 6 to move downwards together, the brake lining is pushed to work, the retainer ring 5 is used for abutting the supporting seat 2, the downward movement position of the supporting seat 2 is limited, and the return spring 4 pushes the supporting seat 2 to reset upwards.

According to the air pressure disc brake of the embodiment, due to the adoption of the bottom plate 1, the deformation resistance of the bottom plate 1 is improved, and the bottom plate 1 is not deformed under a high-strength working condition, so that the stress of the connecting screw is reduced, and the connecting screw is prevented from loosening.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (8)

1. The brake bottom plate is characterized by comprising a bottom plate body, wherein two screw rod perforations are formed in the bottom plate body; a middle boss is formed on the bottom plate body between the two screw rod perforation holes, and a positioning protrusion used for limiting the bottom of the return spring to move is formed on the middle boss.

2. The brake spider of claim 1, wherein the intermediate boss defines an internal recess, the locating boss being located in the internal recess, the lower end of the return spring being located in the internal recess.

3. A brake pad according to claim 1 or claim 2, wherein a ring of skirt projections is formed around the pad body, the skirt projections being provided with a plurality of screw perforations.

4. A brake shoe according to claim 3 wherein the screw bore is formed with a guide barrel, the upper end of the guide barrel defining a collar for engagement with a retainer ring.

5. The brake spider of claim 4, wherein the snap ring is L-shaped in cross-section.

6. The brake spider of claim 2, wherein the boss, the inner recess and the locating boss are formed by stamping.

7. A brake shoe according to claim 3, wherein the skirt projection is provided with 6 screw perforations.

8. The pneumatic disc brake is characterized by comprising a brake caliper body, a bottom plate, a return spring and a supporting seat; the brake pad of claim 4 is used for the pad; the skirt edge bulge of the bottom plate is fixedly connected with the brake caliper body, the upper end of the guide cylinder of the bottom plate is connected with a check ring, and the check ring is suitable for being abutted with the lower end of the supporting seat; the support seat is positioned above the bottom plate, connecting screws are arranged at two ends of the support seat, and the lower ends of the connecting screws penetrate through the bottom plate and then are connected with the pushing block; the return spring is arranged between the supporting seat and the bottom plate, the lower end of the return spring is positioned in the inner groove of the bottom plate, and the upper end of the return spring is abutted against the supporting seat.