CN219299833U

CN219299833U - Brake device

Info

Publication number: CN219299833U
Application number: CN202320811967.2U
Authority: CN
Inventors: 赵洋洋; 娄俊岭; 朱松; 董士龙
Original assignee: Jiongyi Electronic Technology Suzhou Co ltd
Current assignee: Jiongyi Electronic Technology Suzhou Co ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-07-04
Anticipated expiration: 2033-04-13

Abstract

The utility model belongs to the technical field of automobile braking, and discloses a brake, which comprises a brake block and a piston, wherein the piston is arranged with the brake block along the axial direction of the piston, one end of the piston, which is close to the brake block, is provided with a pressing plate, the piston can move along the axial direction of the piston so as to enable the pressing plate to push against the brake block, and the area of the outer contour of the contact part of the pressing plate and the brake block is larger than the area of the end face of the piston. The utility model discloses a brake, which changes the braking force which is originally directly applied to a brake block into the braking force which is firstly applied to the pressure plate by arranging a pressure plate between a piston and the brake block, and then the pressure plate applies the dispersed braking force to the brake block, so that the braking force applied to the brake block with a larger area can be more uniform.

Description

Brake device

Technical Field

The utility model relates to the technical field of automobile braking, in particular to a brake.

Background

A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member (or a moving machine). Different types of vehicles require different braking forces provided by the brakes, and conventional hydraulic brakes often produce greater pressure by increasing the piston bore in order to provide greater braking forces, or a plurality of hydraulic cylinders are provided.

With the rise of electric vehicles, the development of electric control technology is faster and faster, and the development of electronic brake (EMB) in brake-by-wire technology is also accompanied. The traditional hydraulic system is not needed any more to apply hydraulic pressure on the brake disc through the piston and the brake block by compressing brake fluid, so that braking force is generated, but the electric motor is used for providing power, and mechanical force is transmitted to the brake disc through the transmission mechanism by the piston, so that braking force is generated by wheels.

In order to obtain larger braking force, the electronic brake pushes the brake block to act on the brake disc by lifting the power, current or transmission parameters of the motor so that the transmission mechanism inside the electronic brake obtains larger mechanical pressure. And the electronic brake does not need to generate larger pressure by increasing the diameter of the piston cylinder like the traditional hydraulic brake, so that braking forces with different requirements can be obtained under the condition of keeping the transmission mechanism and the piston inside the brake unchanged, and the parts specification and development cost and period are reduced, so that the product has better platform application.

However, when the electronic brake provides larger braking force, the friction force between the brake block and the brake disc is increased, relatively speaking, the deflection force of the brake disc to the brake block is increased, the screw is damaged due to the increase of the deflection force, the area of the brake block is required to be increased in order to avoid the increase of the braking force deflection force, and the geometric center of the replaced brake block is offset from the axis of the piston. This results in that, with the piston specification unchanged, the braking force of the piston does not act at the geometric centre of the brake pad, resulting in an uneven braking force to which the brake pad surface is subjected. The brake pad is subjected to serious problems of eccentric wear and noise, and driving safety and comfort are affected, so that the improvement of the pressure distribution of the brake pad of the electronic brake becomes more important.

Therefore, the above technical problems are to be solved.

Disclosure of Invention

The utility model aims to provide a brake capable of transmitting piston pressure to a brake block in a dispersed manner under different braking forces.

To achieve the purpose, the utility model adopts the following technical scheme:

the brake comprises a brake block and a piston, wherein the brake block and the piston are arranged along the axial direction of the piston, a pressing plate is arranged at one end, close to the brake block, of the piston, the piston can move along the axial direction of the piston so as to enable the pressing plate to push against the brake block, and the area of the outer contour of the contact part of the pressing plate and the brake block is larger than the area of the end face of the piston.

Preferably, the outer contour of the pressure plate is centered with respect to the piston axis.

Preferably, the outer contour of the pressing plate is circular.

Preferably, the pressing plate comprises a mounting part and a protruding part, the mounting part is sleeved at the end part of the piston, and the protruding parts are arranged on two sides of the mounting part along the radial direction of the piston.

Preferably, the outer contour shape of the pressure plate is identical to the outer contour shape of the brake pad.

Preferably, a first groove is formed in the surface of the pressing plate facing the brake pad, and the first groove is centrally symmetrical with respect to the axis of the piston.

Preferably, the pressing plate is horn-shaped, wherein the small end part of the pressing plate is fixedly connected with the piston.

Preferably, the pressing plate is provided with a mounting hole, and the piston is in interference fit with the mounting hole.

Preferably, the contact part of the circumferential surface of the piston and the mounting hole is provided with a rolling tooth.

Preferably, the mounting hole is a through hole, the piston penetrates out of the through hole, knurling is arranged at the end part of the piston, and the contact part of the knurling surface and the brake block is flush with the side wall of the pressure plate, which faces the brake block.

The utility model has the beneficial effects that:

the utility model discloses a brake, which changes the braking force which is originally directly applied to a brake block into the braking force which is firstly applied to the pressure plate by arranging a pressure plate between a piston and the brake block, and then the pressure plate applies the dispersed braking force to the brake block, so that the braking force applied to the brake block with a larger area can be more uniform.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of the present utility model;

FIG. 4 is a first embodiment of a platen of the present utility model;

FIG. 5 is a second embodiment of a platen of the present utility model;

FIG. 6 is a third embodiment of the platen of the present utility model.

In the figure: 1. the device comprises a piston, 11, rolling teeth, 2, a pressing plate, 21, a first groove, 211, a second groove, 22, a mounting part, 221, a mounting hole, 23, a protruding part, 3 and a brake block; 4. a brake disc; 5. a clamp body; 6. a piston dust cover; 7. ball screw.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", etc., azimuth or positional relationship are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of operations, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Embodiment one:

the present embodiment discloses a brake, as shown in fig. 1 to 4, which includes a motor transmission mechanism (not shown in the drawings), the motor transmission mechanism is used as a power output unit of an electronic brake, mechanical energy for converting electric energy into rotational torque acts on a cylinder hole ball screw 7 located inside a caliper body 5, a nut in the ball screw 7 is coupled with a piston 1 and is disposed in the caliper body 5, the nut moves along the axis of the screw under the rotation of the screw, and further drives the piston 1 to approach a brake pad 3, and the two brake pads 3 clamp and release a brake disc 4 under the action of the piston 1. The electronic brake can ensure that braking forces with different magnitudes are provided for vehicles with different models, when the braking force output by the electronic brake is increased, the friction force of the brake disc 3 to the brake disc 4 is increased, correspondingly, the deflection force of the brake disc 4 to the brake disc 3 is increased, the ball screw 7 is easily damaged due to the increase of the deflection force, so that the area of the brake disc needs to be increased for reducing the deflection force, but the geometric center of the brake disc is misplaced with the axis of a screw (or the axis of the piston 1) due to the increase of the area of the brake disc, so that the braking force of the piston 1 is not applied to the geometric center of the brake disc 3 under the condition that the specification of the piston 1 is unchanged, and the braking force born by the surface of the brake disc 3 is uneven.

In order to solve the above-mentioned problem, the brake proposed in the present embodiment further includes a pressure plate 2, one end of the piston 1 near the brake pad 3 is provided with the pressure plate 2, the piston 1 can move in its axial direction to push the pressure plate 2 against the brake pad 3, and the area of the outer contour of the contact portion of the pressure plate 2 and the brake pad 3 is larger than the end surface area of the piston 1. The contact area between the piston 1 and the brake pad 3 is increased, and the braking force provided by the piston 1 is uniformly distributed and transmitted to the brake pad 3 through the pressure plate 2. By providing the pressure plate 2 between the piston 1 and the brake pad 3, the braking force which is originally directly applied to the brake pad 3 is changed into the braking force which is firstly applied to the pressure plate 2, and then the pressure plate 2 applies the dispersed braking force to the brake pad 3, so that the braking force applied to the brake pad 3 with a large area after replacement can be more uniform. And the heat insulation effect can be achieved by the aid of the pressure plate 2, so that heat generated by friction between the brake block 3 and the brake disc is prevented from being transferred to the piston dust cover 6, and the service life of the piston dust cover is prolonged.

Further, the outer contour of the pressure plate 2 is preferably centered on the axis of the piston 1, so that the braking force dispersed by the piston 1 can be uniformly transmitted to the brake pad 3.

Of course, in other alternative embodiments, the outer contour shape of the platen 2 may be a non-centrosymmetric pattern or some other irregular pattern, which is not particularly limited in this embodiment.

Further, for the platen 2, a plate-like structure is selected, and in order to strengthen the plate, a reinforcing rib (not shown) may be provided on the opposite side of the contact portion of the platen 2 with the brake pad 3.

Preferably, a first groove 21 is provided in the surface of the pressure plate 2 facing the brake pad 3, the first groove 21 being centrally symmetrical about the axis of the piston 1. The second grooves 211 may be formed at the bottom of the first groove 21, and when the number of the second grooves is plural, the second grooves 211 located at two sides of the geometric center of the first groove 21 are centrosymmetric.

In this embodiment, the mounting portion 22 on the pressing plate 2 is provided with a mounting hole 221, and the mounting hole 221 may be a blind hole or a through hole, and the end portion of the piston 1 is mounted in the mounting hole 221 in an interference manner. The connection between the piston 1 and the pressing plate 2 is preferably in interference fit, and has the advantages of simple structure, good neutrality, high bearing capacity, small strength weakening of the piston 1 and the pressing plate 2 and good impact resistance.

In order to further improve the connection strength between the piston 1 and the pressing plate 2, the rolling teeth 11 are arranged on the corresponding circumferential surfaces of the end part of the piston 1 and the mounting hole, and the rolling teeth 11 can increase the friction force between the piston 1 and the pressing plate 2, so that the pressing plate 2 is mounted more firmly.

Further, when the mounting hole is a through hole, a knurling (not shown in the figure) may be provided on the end surface of the piston 1, and the contact portion between the knurling surface and the brake pad 3 is flush with the side wall of the pressure plate 2 facing the brake pad, so that the friction force between the piston 1 and the brake pad 3 can be increased when the piston 1 contacts the brake pad 3.

Of course, in other alternative embodiments, other fixing connection manners may be selected, for example, the fixing may be performed by riveting or welding, which is not particularly limited in this embodiment.

Embodiment two:

the difference between this embodiment and the first embodiment is that the shape of the pressing plate is different, as shown in fig. 5, the pressing plate 2 includes a mounting portion 22 and a protruding portion 23, the mounting portion 22 is sleeved on the end portion of the piston 1, and both sides of the mounting portion 22 along the radial direction of the piston 1 are provided with protruding portions 23. The projections 23 on both sides are centrally symmetrical about the geometric center of the pressure plate 2, and the total area of the pressure plate 2 is larger than the end surface area of the piston 1.

Further, the outer contour shape of the pressing plate 2 is the same as the outer contour shape of the brake pad 3.

Of course, in other alternative embodiments, a strip shape or other central symmetrical shape may be selected, the overall structure may be a plate shape or an outwardly convex structure, as shown in fig. 6, the pressure plate 2 is a horn shape, wherein the small end of the pressure plate 2 is fixedly connected with the piston 1, and the large end of the pressure plate 2 is contacted with the brake block 3 under the action of the piston 1. It is particularly noted that the outer contour area of the pressure plate 2 at the contact position with the brake pad 3 is ensured to be larger than the end surface area of the piston 1.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The utility model provides a stopper, includes brake shoe (3) and piston (1), along its axial with brake shoe (3) range, its characterized in that, piston (1) is close to one end of brake shoe (3) is provided with clamp plate (2), piston (1) can be followed its axial displacement so that clamp plate (2) pushes away and supports brake shoe (3), clamp plate (2) with the area of the outline of the contact site of brake shoe (3) is greater than the terminal surface area of piston (1).

2. Brake according to claim 1, characterized in that the outer contour of the pressure plate (2) is centrosymmetric with respect to the piston (1) axis.

3. Brake according to claim 2, characterized in that the outer contour of the pressure plate (2) is circular.

4. Brake according to claim 2, characterized in that the pressure plate (2) comprises a mounting portion (22) and a protruding portion (23), the mounting portion (22) is sleeved at the end of the piston (1), and the protruding portion (23) is arranged on both sides of the mounting portion (22) along the radial direction of the piston (1).

5. Brake according to claim 4, characterized in that the outer contour shape of the pressure plate (2) is identical to the outer contour shape of the brake pad (3).

6. Brake according to claim 1, characterized in that a first groove (21) is provided in the surface of the pressure plate (2) facing the brake pad (3), the first groove (21) being centrally symmetrical with respect to the axis of the piston (1).

7. Brake according to claim 1, characterized in that the pressure plate (2) is horn-shaped, wherein the small end of the pressure plate (2) is fixedly connected with the piston (1).

8. Brake according to one of claims 1 to 7, characterized in that the pressure plate (2) is provided with a mounting hole (221), the piston (1) being interference fit in the mounting hole (221).

9. Brake according to claim 8, characterized in that the piston (1) is provided with rollers (11) at its circumferential surface in contact with the mounting hole.

10. Brake according to claim 9, characterized in that the mounting hole is a through hole, the piston (1) passes through the through hole, and knurling is provided at the end of the piston (1), the contact point of the knurling surface with the brake pad (3) is flush with the side wall of the pressure plate (2) facing the brake pad (3).