Split type brake drum

Abstract

The utility model discloses a split type brake drum, and belongs to the technical field of automobiles. The problem that in the prior art, an automobile brake drum is poor in heat dissipation performance is solved. The brake drum mainly comprises a brake drum body, the brake drum body comprises an annular protection plate, an annular brake plate is arranged in the protection plate, the protection plate and the brake plate are detachably connected, and a middle partition plate is installed between the protection plate and the brake plate.

Description

Technical Field

[0001] This utility model belongs to the field of automotive technology, and more specifically, it relates to a split-type brake drum. Background Technology

[0002] Drum brakes have been used in automobiles for nearly a century. Due to their reliability and powerful braking force, drum brakes are still used in many vehicle models (mostly on the rear wheels). Currently in the Chinese market, due to price differences in brakes, drum brakes remain the preferred choice for rear brakes on commercial vehicles, and brake drum products, as the main braking component, are constantly emerging. However, the failure rate of widely used brake drum products remains consistently high, and a major reason for this high failure rate is poor heat dissipation. Summary of the Invention

[0003] The purpose of this invention is to provide a split-type brake drum to overcome the problem of poor heat dissipation in existing automotive brake drums.

[0004] This utility model is achieved by the following technical solution: a split brake drum, including a brake drum body, the brake drum body including an annular protective plate, the inside of the protective plate being provided with an annular brake plate, the protective plate and the brake plate being detachably connected, and an intermediate partition plate being installed between the protective plate and the brake plate.

[0005] Furthermore, a mounting platform is provided on the lower side of the inner wall of the protective plate, the bottom of the brake plate is mounted on the mounting platform, and an inwardly extending inner flange is installed on the bottom of the protective plate, with fixing holes provided on the inner flange.

[0006] Furthermore, the protective plate has multiple ventilation holes.

[0007] Furthermore, the protective plate and the brake plate are connected by rivets.

[0008] Furthermore, the protective plate and the brake plate are respectively provided with rivet holes for rivets to pass through. The rivet holes on the protective plate are countersunk holes, and the rivet head of the rivet is in the countersunk hole.

[0009] Furthermore, the intermediate partition includes multiple layers of air guide rings distributed vertically at intervals, each layer of air guide ring includes multiple air guide blocks distributed at intervals along the circumferential direction, and the air guide blocks on adjacent layers of air guide rings are arranged alternately along the circumferential direction.

[0010] Furthermore, the intermediate partition includes five layers of air guide rings distributed vertically at intervals.

[0011] Furthermore, in the five-layer air guide ring, the air guide blocks in the middle three layers are all cylindrical; in the five-layer air guide ring, the inner end face of the air guide block in the uppermost layer is an arc-shaped surface, and the inner end face of the air guide block in the lowermost layer is an arc-shaped surface.

[0012] Furthermore, the air guide block is fixedly connected to the outer wall of the brake plate.

[0013] Furthermore, hoop rings are installed on the upper and lower sides of the protective plate respectively.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention, by designing the brake plate and protective plate as separate units, offers several advantages. First, it facilitates ventilation and heat dissipation. A heat dissipation cavity is formed between the brake plate and the protective plate. During the high-speed rotation of the brake drum, this cavity creates an airflow channel that quickly carries away heat from the cavity, improving the brake drum's heat dissipation capacity and significantly extending its fatigue life. Second, it improves the wear resistance of the brake drum. The brake plate's wear resistance parameters can be designed to be higher than those of the protective plate. Third, it facilitates brake plate replacement. When the brake drum is excessively worn, only the brake plate needs to be replaced, eliminating the need to replace the entire brake drum and reducing replacement costs. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a perspective view of the brake plate described in this utility model;

[0019] Figure 4 This is a perspective view of the present invention when the hoop is installed.

[0020] In the diagram: 1. Brake drum body; 2. Protective plate; 3. Brake plate; 4. Intermediate partition plate; 5. Mounting platform; 6. Inner flange; 7. Ventilation hole; 8. Rivet hole; 9. Air guide ring; 10. Air guide block; 11. Hoop ring; 12. Countersunk hole. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the scope of protection of this utility model.

[0022] A split-type brake drum includes a brake drum body 1, the brake drum body 1 includes an annular protective plate 2, the bottom of the protective plate 2 is fitted with an inwardly extending inner flange 6, the inner flange 6 is provided with fixing holes; the protective plate 2 is provided with a plurality of ventilation holes 7.

[0023] The protective plate 2 has an annular brake plate 3 inside, and a mounting platform 5 is provided on the lower side of the inner wall of the protective plate 2. The bottom of the brake plate 3 is mounted on the mounting platform 5. This utility model has several advantages by making the brake plate 3 and the protective plate 2 separate. First, it can facilitate the improvement of the wear resistance of the brake drum. In the design, the wear resistance parameters of the brake plate 3 can be designed to be higher than those of the protective plate 2. Second, it can facilitate the replacement of the brake plate 3. When the wear of the brake drum is too large, the brake plate 3 can be replaced directly without replacing the entire brake drum, reducing replacement costs. Third, it can facilitate ventilation and heat dissipation. A heat dissipation cavity is formed between the brake plate 3 and the protective plate 2. During the high-speed rotation of the brake drum, the heat dissipation cavity between the protective plate 2 and the brake plate 3 forms an air duct. The air duct carries away the heat in the heat dissipation cavity quickly, which greatly improves the fatigue life of the brake drum.

[0024] The protective plate 2 and the brake plate 3 are connected by rivets. The protective plate 2 and the brake plate 3 each have corresponding rivet holes 8 for the rivets to pass through. The rivet holes 8 on the protective plate 2 are countersunk holes 12, and the rivet head is located in the countersunk hole 12. When installing the rivets, the rivets are passed through the rivet holes 8 of the brake plate 3 and the protective plate 2 sequentially from the inside out, so that the rivet head is inserted into the countersunk hole 12 of the brake plate 3, and the rivet end protrudes from the protective plate 2. Finally, the end of the rivet is struck.

[0025] A middle partition 4 is installed between the protective plate 2 and the brake plate 3. The middle partition 4 includes multiple layers of air guide rings 9 spaced vertically, and each layer of air guide ring 9 includes multiple air guide blocks 10 spaced circumferentially. The air guide blocks 10 on adjacent layers of air guide rings 9 are staggered circumferentially. By designing the middle partition 4 with the above structure, heat dissipation of the heat dissipation cavity between the protective plate 2 and the brake plate 3 can be facilitated, the air ducts in the heat dissipation cavity can be interconnected, the airflow of the heat dissipation cavity can be enhanced, thereby improving the heat dissipation capacity and making the heat dissipation in the entire heat dissipation cavity more uniform.

[0026] The air guide block 10 is fixedly connected to the outer wall of the brake plate 3. The brake plate 3 with the air guide block 10 installed is press-fitted with the protective plate 2. During installation, the protective plate 2 can be heated first, and then the brake plate 3 with the air guide block 10 installed can be inserted into the protective plate 2. The brake plate 3 and the protective plate 2 can be designed with a positioning structure during assembly so that the rivet holes 8 on the brake plate 3 and the protective plate 2 can be aligned with each other after the brake plate 3 is inserted into the protective plate 2. The positioning structure can have a variety of structural designs, such as designing opposite sliding grooves on the inner wall of the protective plate 2 and opposite sliding blocks on the outer wall of the brake plate 3.

[0027] The intermediate partition 4 includes five layers of air guide rings 9 arranged vertically at intervals. In the five layers of air guide rings 9, the air guide blocks 10 in the middle three layers are all cylindrical, while the inner end faces of the air guide blocks 10 in the uppermost and lowermost layers are arc-shaped. This invention enhances the airflow within the heat dissipation cavity between the protective plate 2 and the braking plate 3 by designing the air guide blocks 10 in the middle three layers of air guide rings 9 as cylindrical, the inner end faces of the air guide blocks 10 in the uppermost layer of air guide ring 9 as arc-shaped, and the inner end faces of the air guide blocks 10 in the lowermost layer of air guide ring 9 as arc-shaped.

[0028] The upper and lower sides of the protective plate 2 are respectively equipped with hoop rings 11. Both the upper and lower hoop rings 11 are interference-fitted with the protective plate 2, and both the upper and lower hoop rings 11 are fixedly connected to the protective plate 2 by screws. By setting the upper and lower hoop rings 11, this utility model can significantly improve the structural strength of the brake drum. Currently, the upper and lower end faces of the brake drum are prone to deformation and failure due to the force and force transmission. The hoop rings 11 can effectively suppress the deformation of the brake drum.

Claims

1. A split brake drum comprising a brake drum body (1) comprising a ring-shaped protection plate (2), characterized in that, The inner part of the protection plate (2) is provided with a ring-shaped brake plate (3), the protection plate (2) and the brake plate (3) are detachably connected, and an intermediate partition plate (4) is arranged between the protection plate (2) and the brake plate (3).

2. The split brake drum of claim 1, wherein, The lower side of the inner wall of the protection plate (2) is provided with a mounting table (5), the bottom of the brake plate (3) is mounted on the mounting table (5), and the bottom of the protection plate (2) is provided with an inwardly extending inner flange (6), and the inner flange (6) is provided with a fixing hole.

3. The split brake drum of claim 1, wherein, A plurality of ventilation holes (7) are formed in the protection plate (2).

4. The split brake drum of claim 1, wherein, The protection plate (2) and the brake plate (3) are connected through rivets.

5. The split brake drum of claim 4, wherein, Corresponding rivet holes (8) for the rivets are formed in the protection plate (2) and the brake plate (3), the rivet holes (8) in the protection plate (2) are countersunk holes (12), and the rivet heads of the rivets are in the countersunk holes (12).

6. The split brake drum of claim 1, wherein, The intermediate partition plate (4) comprises a plurality of layers of wind guide rings (9) vertically spaced apart, each layer of wind guide rings (9) comprises a plurality of wind guide blocks (10) spaced apart in the circumferential direction, and the wind guide blocks (10) on the adjacent two layers of wind guide rings (9) are arranged in the circumferential direction.

7. The split brake drum of claim 6, wherein, The intermediate partition plate (4) comprises five layers of wind guide rings (9) vertically spaced apart.

8. The split brake drum of claim 7, wherein, In the five layers of wind guide rings (9), the wind guide blocks (10) in the middle three layers of wind guide rings (9) are all cylindrical; in the five layers of wind guide rings (9), the inner end faces of the wind guide blocks (10) in the uppermost layer of wind guide rings (9) are arc faces, and the inner end faces of the wind guide blocks (10) in the lowermost layer of wind guide rings (9) are arc faces.

9. The split brake drum of claim 6, wherein, The wind guide blocks (10) are fixedly connected with the outer wall of the brake plate (3).

10. The split brake drum of claim 1, wherein, The upper and lower sides of the protection plate (2) are respectively provided with a hoop (11).

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