Integrated drum brake for front wheel of electric vehicle

Abstract

The utility model relates to the technical field of electric vehicles, in particular to an electric vehicle front wheel integrated drum brake which comprises a front wheel body, a brake drum is arranged in the front wheel body, a brake shoe is arranged in the brake drum, and a left drum cover and a right drum cover are arranged at the left end and the right end of the brake drum respectively. Sealing mechanisms are arranged between the left drum cover and the brake drum as well as between the right drum cover and the brake drum, and through the arrangement of the integrated drum brake for the front wheel of the electric vehicle, by means of the structural design in the sealing mechanisms, under the cooperation of the sealing protruding blocks and the grooves, the sealing protruding blocks make contact with the sealing ring blocks; and the supporting spring can adapt to expansion caused by heat and contraction caused by cold when the brake drum works and support the sealing ring block, so that the sealing effect between the sealing convex block and the sealing ring block is maintained, the sealing performance between the drum cover and the brake drum is further ensured, dust and impurities are effectively prevented from entering the brake drum, and the brake performance and reliability of the drum brake are improved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, specifically to an integrated drum brake for the front wheel of an electric vehicle. Background Technology

[0002] In electric vehicle braking systems, drum brakes are a common braking method and a good braking device for motor vehicles. When braking, hydraulic pressure pushes the brake pads to contact the inner edge of the brake drum, and the friction generated by the contact inhibits the rotation of the tire to achieve the purpose of braking.

[0003] The currently used type of integrated drum brake for electric vehicles is prone to thermal expansion and contraction of the brake drum during operation. This leads to a decrease in the sealing performance between the drum cover and the brake drum, allowing dust and impurities to enter the brake drum and reducing the braking performance and reliability of the drum brake.

[0004] In summary, this utility model solves the problems in the background art by designing an integrated drum brake for the front wheel of an electric vehicle. Utility Model Content

[0005] The purpose of this invention is to provide an integrated drum brake for the front wheel of an electric vehicle to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An integrated drum brake for the front wheel of an electric vehicle includes a front wheel body, a brake drum inside the front wheel body, brake shoes inside the brake drum, a left drum cover and a right drum cover at the left and right ends of the brake drum, and a sealing mechanism between the left drum cover and the right drum cover and the brake drum.

[0008] The sealing mechanism includes sealing protrusions and grooves. The sealing protrusions are fixedly installed on the opposing side surfaces of the left and right drum covers, respectively. The grooves are opened on the left and right end surfaces of the brake drum, and support springs and sealing ring blocks are respectively provided inside them.

[0009] As a preferred embodiment of this utility model, the brake pads are in contact with the right side surface of the left drum cover via a fixing member.

[0010] As a preferred embodiment of this utility model, a gap is left between the outer surface of the brake shoe and the inner wall of the brake drum, and it is made of carbon fiber ceramic composite material.

[0011] As a preferred embodiment of this utility model, the front wheel body and the brake drum are integrally formed.

[0012] As a preferred embodiment of this utility model, the vertical cross-sectional shape of the groove matches the sealing protrusion.

[0013] As a preferred embodiment of this utility model, one end of the support spring is fixed to the inner wall of the groove, and the other end is fixed to one side surface of the sealing ring block. There are multiple support springs, and the multiple support springs are distributed in a ring at equal intervals about the inner wall of the groove.

[0014] As a preferred embodiment of this utility model, the outer surface of the sealing ring block is in sealed contact with the inner wall of the groove, and it is made of wear-resistant rubber material.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, an integrated drum brake for the front wheel of an electric vehicle is designed. The sealing mechanism utilizes a structural design where the sealing protrusion and groove work together to bring the sealing protrusion into contact with the sealing ring. The supporting spring adapts to the thermal expansion and contraction of the brake drum during operation and supports the sealing ring, maintaining the sealing effect between the sealing protrusion and the sealing ring. This ensures the sealing performance between the drum cover and the brake drum, effectively preventing dust and impurities from entering the brake drum and improving the braking performance and reliability of the drum brake. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partially exploded structural diagram of the drum brake of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the sealing ring block and the groove of this utility model when they are separated.

[0020] In the diagram: 1. Front wheel body; 2. Brake drum; 3. Brake shoes; 4. Left drum cover; 5. Right drum cover; 6. Sealing mechanism; 601. Sealing protrusion; 602. Groove; 603. Support spring; 604. Sealing ring block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] For examples, please refer to Figure 1-3 This utility model provides a technical solution:

[0026] An integrated drum brake for the front wheel of an electric vehicle includes a front wheel body 1, a brake drum 2 inside the front wheel body 1, a brake shoe 3 inside the brake drum 2, a left drum cover 4 and a right drum cover 5 at the left and right ends of the brake drum 2 respectively, and a sealing mechanism 6 between the left drum cover 4 and the right drum cover 5 and the brake drum 2.

[0027] Specifically, the brake pad 3 contacts the right side surface of the left drum cover 4 through a fixing member, and there is a gap between the outer surface of the brake pad 3 and the inner wall of the brake drum 2. It is made of carbon fiber ceramic composite material.

[0028] In this embodiment, the brake pads 3 made of carbon fiber ceramic composite material have high wear resistance and thermal stability, which can reduce the wear between the brake pads 3 and the brake drum 2 and extend the service life of the braking system.

[0029] It should be noted that the front wheel body 1 and the brake drum 2 are manufactured as a single piece;

[0030] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3The sealing mechanism 6 includes a sealing protrusion 601 and a groove 602. The sealing protrusion 601 is fixedly installed on the opposing side surfaces of the left drum cover 4 and the right drum cover 5 respectively. The groove 602 is opened on the left and right end surfaces of the brake drum 2, and a support spring 603 and a sealing ring block 604 are respectively provided inside it.

[0031] Specifically, the vertical cross-sectional shape of the groove 602 matches the sealing protrusion 601. One end of the support spring 603 is fixed to the inner wall of the groove 602, and the other end is fixed to one side surface of the sealing ring block 604. There are multiple support springs 603, which are distributed in a ring at equal intervals about the inner wall of the groove 602. The outer surface of the sealing ring block 604 is in sealing contact with the inner wall of the groove 602, and it is made of wear-resistant rubber material.

[0032] In this embodiment, the groove 602 is mainly used to form a positioning contact with the sealing protrusion 601, which facilitates the contact between the sealing protrusion 601 and the sealing ring block 604. The support spring 603 is mainly used to provide elastic support for the sealing ring block 604, so that the sealing ring block 604 and the sealing protrusion 601 remain tightly sealed, thus meeting the sealing requirements of the drum brake.

[0033] The working process of this utility model is as follows: When using an integrated drum brake for the front wheel of an electric vehicle, the left drum cover 4 and the right drum cover 5 come into contact with the sealing protrusion 601 in the groove 602, causing them to be close to the brake drum 2. Subsequently, the sealing protrusion 601 moves along the inner wall of the groove 602 and comes into contact with the sealing ring block 604. During the contact process, the sealing ring block 604 gradually compresses the support spring 603, and the support spring 603 slowly contracts and generates an elastic force. This force makes the sealing ring block 604 and the sealing protrusion 601 form a tight contact, effectively preventing dust and impurities from entering the brake drum 2, providing a sealing effect for the drum brake, and benefiting subsequent use.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated drum brake for the front wheel of an electric vehicle, comprising a front wheel body (1), characterized in that: The front wheel body (1) is provided with a brake drum (2) inside, and a brake shoe (3) is provided inside the brake drum (2). A left drum cover (4) and a right drum cover (5) are provided at the left and right ends of the brake drum (2). A sealing mechanism (6) is provided between the left drum cover (4) and the right drum cover (5) and the brake drum (2). The sealing mechanism (6) includes a sealing protrusion (601) and a groove (602). The sealing protrusion (601) is fixedly installed on the opposing side surfaces of the left drum cover (4) and the right drum cover (5), respectively. The groove (602) is opened on the left and right end surfaces of the brake drum (2), and a support spring (603) and a sealing ring block (604) are respectively provided inside it.

2. The integrated drum brake for the front wheel of an electric vehicle according to claim 1, characterized in that: The brake pads (3) are in contact with the right side surface of the left drum cover (4) via a fixing member.

3. The integrated drum brake for the front wheel of an electric vehicle according to claim 1, characterized in that: The outer surface of the brake shoe (3) is separated from the inner wall of the brake drum (2), and it is made of carbon fiber ceramic composite material.

4. The integrated drum brake for the front wheel of an electric vehicle according to claim 1, characterized in that: The front wheel body (1) and the brake drum (2) are integrally formed.

5. The integrated drum brake for the front wheel of an electric vehicle according to claim 1, characterized in that: The vertical cross-sectional shape of the groove (602) matches that of the sealing protrusion (601).

6. The integrated drum brake for the front wheel of an electric vehicle according to claim 1, characterized in that: One end of the support spring (603) is fixed to the inner wall of the groove (602), and the other end is fixed to one side surface of the sealing ring block (604). There are multiple support springs (603), and the multiple support springs (603) are distributed in a ring at equal intervals about the inner wall of the groove (602).

7. The integrated drum brake for the front wheel of an electric vehicle according to claim 1, characterized in that: The outer surface of the sealing ring block (604) is in sealed contact with the inner wall of the groove (602), and it is made of rubber wear-resistant material.

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