Novel combined anti-cracking brake drum

Abstract

The utility model relates to a novel combined anti-cracking brake drum, which comprises a brake drum body and an alloy reinforcing ring, and is characterized in that the alloy reinforcing ring is sleeved on the peripheral surface of a rim part of the brake drum body, an annular limiting boss is arranged on the peripheral surface of the rim part, and the alloy reinforcing ring is axially clamped and positioned by utilizing the annular limiting boss and a plurality of L-shaped pressing blocks. A plurality of circles of ring grooves are formed in the inner circumferential face of the alloy reinforcing ring at intervals, and a plurality of radial heat dissipation holes are evenly formed in the bottom faces of the ring grooves. The reinforcing structure solves the problems that an existing reinforcing structure of the combined brake drum is poor in positioning performance and heat dissipation performance, under the high-temperature working condition, cracking and deformation are avoided, the service life is prolonged, and driving safety and stability are guaranteed.

Description

Technical Field

[0001] The utility model relates to parts of a vehicle brake assembly, and particularly to a novel combined anti-cracking brake drum. Background Art

[0002] A brake drum is a device fixed on a wheel hub and jointly acting with a brake caliper to achieve braking, and belongs to a key part in a brake assembly. Currently, commonly used brake drums are made by pure casting. During the actual driving process of a vehicle, the brake drum is used very frequently. When the vehicle is heavily loaded and brakes for a long time downhill, a large amount of heat and a large braking force are generated on the braking surface, and cracks are easily generated in the axial direction of the braking surface, and the brake drum body is deformed. On the one hand, the service life of the brake drum is shortened, and on the other hand, it will cause a large gap between the brake pads and the braking surface when the vehicle brakes, and the brakes cannot be applied, and the safety of people and vehicles cannot be guaranteed.

[0003] In order to overcome the above defects, a combined brake drum has emerged at present, that is, a strengthening structure is added on the basis of the brake drum body to increase the use strength, but there are still the following problems: 1. The positioning of the strengthening structure is poor, it is easy to fall off, and the service life is short; 2. The heat dissipation performance of the brake drum becomes worse, which restricts the use of the strengthening structure. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a novel combined anti-cracking brake drum with reasonable structure and reliable use, solve the problems of poor positioning and poor heat dissipation performance of the strengthening structure of the existing combined brake drum, avoid cracking and deformation under high-temperature working conditions, extend the service life, and ensure the safety and stability of driving.

[0005] The technical solution of the utility model is as follows:

[0006] A novel combined anti-cracking brake drum includes a brake drum body and an alloy strengthening ring. The brake drum body includes a flange part and a rim part connected to the flange part. The technical key points are: the alloy strengthening ring is sleeved on the outer peripheral surface of the rim part. An annular limiting boss is arranged on the outer peripheral surface of the rim part near its edge side. The alloy strengthening ring is axially clamped and positioned by the annular limiting boss and a plurality of L-shaped pressing blocks. Grooves corresponding to the L-shaped pressing blocks one by one are evenly arranged at the joint of the flange part and the rim part. The L-shaped pressing block is composed of a fixing part connected to the bottom of the groove and an extrusion part that is attached to the outer peripheral surface of the rim part and abuts against the alloy strengthening ring. The front end surface of the alloy strengthening ring is provided with first positioning grooves corresponding to the ends of the extrusion parts one by one. A plurality of second positioning grooves are arranged on the rear end surface of the alloy strengthening ring. Positioning claws corresponding to the second positioning grooves one by one are arranged on the annular limiting boss. A plurality of rings of annular grooves are arranged at intervals on the inner peripheral surface of the alloy strengthening ring. A plurality of radial heat dissipation holes are evenly arranged on the bottom surface of the annular groove.

[0007] In the above-mentioned novel combined crack-proof brake drum, screw holes are provided at the bottom of the groove, through holes corresponding to the screw holes are provided on the fixing part of the L-shaped pressing block, and the shank part of the screw passes through the through hole and then is screwed into the screw hole.

[0008] In the above-mentioned novel combined crack-proof brake drum, the radial heat dissipation holes in two adjacent rings of grooves are arranged staggeredly to ensure the service strength.

[0009] In the above-mentioned novel combined crack-proof brake drum, the bottom of the groove communicates with the inner side of the rim part, further enhancing the heat dissipation performance.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. The axial positioning of the alloy reinforcing ring is realized by using a plurality of L-shaped pressing blocks and annular limiting bosses. The first positioning groove and the second positioning groove of the alloy reinforcing ring are respectively matched with the L-shaped pressing block and the positioning claw, avoiding the circumferential creep of the alloy reinforcing ring, ensuring good positioning of the alloy reinforcing ring on the brake drum body, avoiding axial and circumferential displacement, and avoiding falling off, thereby prolonging the service life.

[0012] 2. Since multiple rings of grooves are arranged at intervals on the inner circumferential surface of the alloy reinforcing ring, and a plurality of radial heat dissipation holes are evenly arranged at the bottom of the grooves, good heat dissipation is ensured without affecting the service strength of the brake drum body. Under high-temperature working conditions, cracking and deformation are avoided, the service life is prolonged, and the driving safety and stability are ensured. Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of the present utility model;

[0014] Figure 2 is a structural schematic diagram of the brake drum body of the present utility model;

[0015] Figure 3 is a structural schematic diagram of the alloy reinforcing ring of the present utility model.

[0016] In the figure: 1. flange part, 2. groove, 3. screw, 4. L-shaped pressing block, 401. fixing part, 402. extrusion part, 5. alloy reinforcing ring, 6. radial heat dissipation hole, 7. ring groove, 8. annular limiting boss, 9. rim part, 10. second positioning groove, 11. first positioning groove, 12. screw hole, 13. positioning claw. Detailed Embodiments

[0017] The present utility model will be described in detail according to the accompanying drawings of the specification.

[0018] As Figures 1 to 3 shown, the novel combined crack-proof brake drum includes a brake drum body and an alloy reinforcing ring 5. The brake drum body includes a flange part 1 and a rim part 9 connected to the flange part 1.

[0019] Among them, the alloy reinforcing ring 5 is sleeved on the outer peripheral surface of the rim portion 9. An annular limiting boss 8 is provided on the outer peripheral surface of the rim portion 9 near its edge side. The alloy reinforcing ring 5 is axially clamped and positioned by the annular limiting boss 8 and three L-shaped pressing blocks 4. The flange portion 1 is evenly provided with grooves 2 corresponding one-to-one with the L-shaped pressing blocks 4 at the joint with the rim portion 9. The L-shaped pressing block 4 is composed of a fixing portion 401 connected to the bottom of the groove 2 and a pressing portion 402 that is attached to the outer peripheral surface of the rim portion 9 and abuts against the alloy reinforcing ring 5. A screw hole 12 is provided at the bottom of the groove 2. A through hole corresponding to the screw hole 12 is provided on the fixing portion 401 of the L-shaped pressing block 4. The shank portion of the screw 3 passes through the through hole and is screwed into the screw hole 12.

[0020] The front end surface of the alloy reinforcing ring 5 is provided with first positioning grooves 11 corresponding one-to-one with the ends of the pressing portions 402. A plurality of second positioning grooves 10 are provided on the rear end surface of the alloy reinforcing ring 5. Positioning claws 13 corresponding one-to-one with the second positioning grooves 10 are provided on the annular limiting boss 8.

[0021] A plurality of rings of annular grooves 7 are provided at intervals on the inner peripheral surface of the alloy reinforcing ring 5. A plurality of radial heat dissipation holes 6 are evenly provided on the bottom surface of the annular groove 7. The radial heat dissipation holes 6 in two adjacent rings of annular grooves 7 are arranged staggeredly to ensure the use strength. The bottom of the groove 2 communicates with the inside of the rim portion 9 to further enhance the heat dissipation performance.

[0022] During production, the number of L-shaped pressing blocks 4 can be determined according to the size of the brake drum. During assembly, first, the alloy reinforcing ring 5 is sleeved on the outside of the rim portion 9 of the brake drum body, so that the second positioning groove 10 of the alloy reinforcing ring 5 is buckled with the positioning claw 13 on the annular limiting boss 8 to achieve pre-positioning. Then, each L-shaped pressing block 4 is buckled at the corresponding groove 2. The end of the pressing portion 402 of the L-shaped pressing block 4 is buckled with the first positioning groove 11 of the alloy reinforcing ring 5 to achieve pressing positioning. Finally, the L-shaped pressing block 4 and the brake drum body are connected and fixed by the screw 3.

[0023] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equal changes and improvements made within the scope of the creation of the present invention shall still fall within the scope covered by this patent.

Claims

1. A new type of combined anti-cracking brake drum, comprising a brake drum body and an alloy reinforcing ring. The brake drum body includes a flange portion and a rim portion connected to the flange portion, and is characterized in that: The alloy reinforcing ring is sleeved on the outer peripheral surface of the rim part. An annular limiting boss is provided on the outer peripheral surface of the rim part near its edge side. The alloy reinforcing ring is axially clamped and positioned by the annular limiting boss and a plurality of L-shaped pressing blocks. Grooves corresponding to the L-shaped pressing blocks one by one are evenly provided at the joint of the flange part and the rim part. The L-shaped pressing block is composed of a fixing part connected to the bottom of the groove and a pressing part that is attached to the outer peripheral surface of the rim part and abuts against the alloy reinforcing ring. The front end surface of the alloy reinforcing ring is provided with first positioning grooves corresponding to the ends of the pressing parts one by one. A plurality of second positioning grooves are provided on the rear end surface of the alloy reinforcing ring. Positioning claws corresponding to the second positioning grooves one by one are provided on the annular limiting boss. Multiple rings of annular grooves are spaced on the inner peripheral surface of the alloy reinforcing ring. A plurality of radial heat dissipation holes are evenly provided on the bottom surface of the annular groove.

2. The novel combined anti-cracking brake drum according to claim 1, wherein: A screw hole is provided at the bottom of the groove. A through hole corresponding to the screw hole is provided on the fixing part of the L-shaped pressing block. The shank part of the screw passes through the through hole and then is screwed into the screw hole.

3. The novel combined anti-cracking brake drum according to claim 1, characterized in that: The radial heat dissipation holes in two adjacent rings of annular grooves are arranged staggeredly.

4. The novel combined anti-cracking brake drum according to claim 1, characterized in that: The bottom of the groove communicates with the inner side of the rim part.

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