Self-heating wheel brake drum and manufacturing method thereof

Abstract

The present invention relates to a brake wheel hub for automobiles, in particular to a self-heating wheel brake drum and a manufacturing method thereof; the technical solution of the present invention to solve the technical problem thereof is: to improve the structure of the automobile wheel brake drum, preferably incorporate materials with excellent heat dissipation performance into the structure, solve the heat dissipation problem of the automobile wheel brake drum, thereby stabilizing the braking performance of the automobile, achieving the goal of reducing the potential safety hazards and unnecessary economic losses of the automobile, and bringing good news to the safe driving of the automobile; the self-heating wheel brake drum is composed of a friction drum and a heat dissipation hoop; it is characterized in that the heat dissipation hoop and the friction drum are pressed together to form a self-heating wheel brake drum; it can solve the heat dissipation problem of the automobile wheel brake drum, stabilize the braking performance of the automobile, reduce the potential safety hazards and unnecessary economic losses of the automobile, and achieve the purpose of bringing good news to the safe driving of the automobile.

Description

Technical Field

[0001] The invention relates to a brake wheel hub for automobiles, in particular to a self-heat dissipating wheel brake drum and a manufacturing method thereof. Background Art

[0002] The wheel brake drum, also known as the brake drum and brake hub, is a cast iron part shaped like a tambourine. It is fixed to the tire and rotates synchronously. When the car brakes, oil pressure is used to push the brake shoe to contact the inner wall of the brake drum. The friction generated by the contact suppresses the rotation of the wheel to achieve the purpose of braking.

[0003] When the car brakes, the friction between the brake shoe and the inner wall of the brake drum is very large, causing the brake drum to convert kinetic energy into heat energy. When the car is heavily loaded and brakes frequently, the temperature of the brake drum is extremely high, which can easily burn the brake shoe, causing the car to be unable to brake, which can easily cause traffic safety accidents. Therefore, solving the heat dissipation problem of the car wheel brake drum is an important measure to stabilize the car's braking performance, which will bring good news to the car's safety and reduce car safety hazards and unnecessary economic losses. Therefore, solving the heat dissipation problem of the car wheel brake drum is a wonderful task that is very worthy of our study. Summary of the invention

[0004] The invention provides a self-heat dissipating wheel brake drum and a manufacturing method thereof, which can effectively solve the heat dissipation problem of the automobile wheel brake drum.

[0005] In order to solve the problems of the above-mentioned background technology, we invented a self-heating wheel brake drum and a manufacturing method thereof through technical research, experiments, tests and analytical research.

[0006] The technical solution of the present invention to solve its technical problem is: to improve the structure of the automobile wheel brake drum, preferably incorporate materials with excellent heat dissipation performance into the structure, solve the heat dissipation problem of the automobile wheel brake drum, thereby stabilizing the braking performance of the automobile, reducing automobile safety hazards and unnecessary economic losses, and bringing good news to the safe driving of the automobile.

[0007] The self-heating wheel brake drum is composed of a friction drum and a heat dissipation hoop; the characteristics are: the friction drum includes the outer surface of the disc, the axial hole, the conical ring surface, the conical top, the disc body, the connecting and mounting hole, the locking hoop buckle groove, the friction ring surface, the friction cavity, the conical ring body A, and the inner surface of the disc; the heat dissipation hoop includes a heat sink, a conical ring body B, a conical hole, an inner conical ring surface, an outer conical ring surface, a heat dissipation groove, and a riveting ring.

[0008] The friction drum is composed of a disc body and a conical ring body A; the disc body of the friction drum is provided with an axial hole and a connecting and mounting hole; the axial hole is provided with an axial pin groove; a plurality of connecting and mounting holes are distributed in an array around the axial hole, and the number of the mounting holes is 3-12; the conical ring body A is an annular wall body; the inner wall of the conical ring body A is a friction ring surface, and the friction ring surface is perpendicular to the inner surface of the disc of the disc body; the conical ring body A and the axial hole of the disc body have the same axis; the friction ring surface and the axis of the axial hole in the disc body are parallel to each other; the outer wall surface of the conical ring body A is a tapered conical ring surface, and the conical ring surface and the axial hole on the disc body have the same axis; the conical ring surface and the axis of the axial hole in the disc body are tapered. The angle of the cone ring body A is 1:7-12; the right end of the cone ring body A is a cone top; the top surface of the cone top is parallel to the outer surface of the disk body, and the top surface of the cone top is perpendicular to the axis of the axial hole in the disk body; the cone ring body A and the cone ring surface are used to facilitate the fitting and pressing of the heat dissipation hoop; the left end of the cone ring body A and the periphery of the disk body are provided with a locking hoop buckle groove, the left angle of the bottom of the locking hoop buckle groove is a right angle, the right angle of the bottom of the locking hoop buckle groove is 75-136 degrees, and the number of the locking hoop buckle grooves is 1-4; the locking hoop buckle groove of the friction drum is used to lock the heat dissipation hoop after the friction drum and the heat dissipation hoop (2) are combined, so that the friction drum and the heat dissipation hoop will not separate after being combined, thereby stabilizing the heat dissipation performance.

[0009] The production method of the present invention includes a production method of components and a production method of combining components.

[0010] The production method of the assembly includes a production method of a heat dissipation hoop and a production method of a friction drum.

[0011] The beneficial effects of the present invention are: it can solve the heat dissipation problem of the automobile wheel brake drum, stabilize the automobile's braking performance, reduce the automobile's safety hazards and unnecessary economic losses; achieve the purpose of bringing good news to the safe driving of the automobile; promote the driver's sense of security, be beneficial to traffic safety, reduce safety accidents, bring economic benefits to the user unit, save maintenance costs, save energy, protect the environment, and bring immeasurable beneficial effects to families, collectives, society and the country. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural front view of a self-heat dissipating wheel brake drum of the present invention.

[0013] Figure 2 The present invention Figure 1 AA section view.

[0014] Figure 3 It is a structural front view of a friction drum of a self-heat dissipating wheel brake drum of the present invention.

[0015] Figure 4 The present invention Figure 3 BB section view.

[0016] Figure 5 It is a structural front view of a heat dissipation hoop of a self-heat dissipating wheel brake drum of the present invention.

[0017] Figure 6 The present invention Figure 5 CC section view.

[0018] Figure 7 The present invention Figure 4 Enlarged view of part I1.

[0019] Figure 8 The present invention Figure 2 Enlarged view of part I2.

[0020] Fig. 9 It is a schematic diagram of the pressing direction of the combined components of the present invention.

[0021] In the figure, 1. friction drum; 2. heat sink; 10. outside of the disc; 11. axial hole; 12. conical ring surface; 13. conical top; 14. disc body; 15. connecting and mounting hole; 16. locking hoop buckle groove; 17. friction ring surface; 18. friction cavity; 19. conical ring body A; 20. inner surface of the disc; 21. heat sink; 22. conical ring body B; 23. conical hole; 24. inner conical ring surface; 25. outer conical ring surface; 26. heat dissipation groove; 27. riveting ring. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings.

[0023] exist Figure 1 , Figure 2 The self-heating wheel brake drum is composed of a friction drum (1) and a heat dissipation hoop (2); the characteristics are as follows: the friction drum (1) includes an outer surface of a disc (10), an axial hole (11), a conical ring surface (12), a conical top (13), a disc body (14), a connecting mounting hole (15), a locking hoop buckle groove (16), a friction ring surface (17), a friction cavity (18), a conical ring body A (19), and an inner surface of a disc (20); the heat dissipation hoop (2) includes a heat sink (21), a conical ring body B (22), a conical hole (23), an inner conical ring surface (24), an outer conical ring surface (25), a heat dissipation groove (26), and a riveting ring.

[0024] exist Figure 3 , Figure 4 , Figure 7In the embodiment, the friction drum (1) is mainly composed of a disc body (14) and a cone ring body A (19); the disc body (14) of the friction drum (1) is provided with an axial hole (11) and a connecting and mounting hole (15); the axial hole (11) is provided with an axial pin groove; a plurality of connecting and mounting holes (15) are distributed in an array around the axial hole (11), and the number of the mounting holes (15) is 3-12; the cone ring body A (19) is an annular wall body; the inner wall of the cone ring body A (19) is a friction ring surface (17); The friction ring surface (17) and the inner surface (20) of the disk body (14) are perpendicular to each other; the conical ring body A (19) and the axial hole (11) of the disk body (14) have the same axis; the friction ring surface (17) and the axis of the axial hole (11) in the disk body (14) are parallel to each other; the outer wall surface of the conical ring body A (19) is a conical ring surface (12) with a taper, and the conical ring surface (12) and the axial hole (11) on the disk body (14) have the same axis; the conical ring surface (12) and the The taper of the axis of the axial hole (11) in the disk body (14) is 1:7-12; the right end of the cone ring body A (19) is the cone top (13); the top surface of the cone top (13) is parallel to the outer surface (10) of the disk body (14), and the top surface of the cone top (13) is perpendicular to the axis of the axial hole (11) in the disk body (14); the cone ring body A (19) and the cone ring surface (12) are used to facilitate the fitting and pressing of the heat dissipation hoop (2); the cone ring body A (19 ) and the periphery of the disc body (14) are provided with a locking hoop buckle groove (16), the left angle of the groove bottom of the locking hoop buckle groove (16) is a right angle, the right angle of the groove bottom of the locking hoop buckle groove (16) is 75-136 degrees, and the number of the locking hoop buckle grooves (16) is 1-4; the locking hoop buckle groove (16) of the friction drum (1) is used to lock the heat dissipation hoop (2) after the friction drum (1) and the heat dissipation hoop (2) are combined, so that the friction drum (1) and the heat dissipation hoop (2) will not separate after being combined, thereby stabilizing the heat dissipation performance.

[0025] exist Figure 5 , Figure 6The heat dissipation hoop (2) is mainly composed of a conical ring body B (22) and a heat sink (21); and has a central conical hole (23); the inner wall surface of the conical ring body B (22) is a conical inner conical ring surface (24), and the conicity of the inner conical ring surface (24) is 1:9-20; the outer wall surface of the conical ring body B (22) is a conical outer conical ring surface (25), and the conicity of the outer conical ring surface (25) is 1:9-20; the conical ring body B (2 2) has an inner conical ring surface (24) and an outer conical ring surface (25) of the same taper and the same axis; the inner conical ring surface (24) and the outer conical ring surface (25) of the conical ring body B (22) have an equal taper, and the function of the same taper is to reduce the thickness of the conical ring body B (22) to the maximum extent, thereby achieving the maximum weight reduction and increased heat dissipation performance; the left end of the conical ring body B (22) has a protruding riveting ring (27), and the riveting ring (27) functions to heat the heat hoop ( 2) The heat sink hoop (2) is locked by riveting when combined with the friction drum (1), so that the heat sink hoop (2) and the friction drum (1) will not separate after being combined; the outer conical ring surface (25) of the heat sink hoop (2) is arrayed with 16-280 heat sinks (21), and heat sink grooves (26) are provided between the heat sinks (21), and the number of the heat sink grooves (26) is proportional to the number of the heat sinks (21); the heat sink (21) is a quadrilateral strip; the upper side of the heat sink (21) is perpendicular to the left and right sides respectively; the bottom side of the heat sink (21) has an inclination, and the inclination of the bottom side of the heat sink (21) is synchronized with the outer conical ring surface (25) of the conical ring body B (22); the height of the left side of the heat sink (21) is less than the height of the right side; the purpose of the left side of the heat sink (21) being smaller and the right side being larger is to make full use of the effective surface and maximize the heat dissipation performance with a limited height.

[0026] The production method of the present invention includes a production method of components and a production method of combining components.

[0027] The production method of the assembly comprises a production method of a heat dissipation hoop (2) and a production method of a friction drum (1).

[0028] The production method of the friction drum (1) is: A1. Figure 3 , Figure 4 Structural casting blank; the blank material is: gray iron; A2. According to Figure 4 The cast blank is turned on a lathe to use the outer surface (10) of the disk as a reference surface, and the edge of the outer surface (10) of the disk is pressed Figure 3 , Figure 4 Structural processing lock hoop buckle groove (16); A3. Fix the blank on the boring machine for rough boring, the rough boring is: cutting in sequence Figure 3 , Figure 4 The conical ring surface (12), the inner surface of the disk (20), and the cone top (13) of the structure are formed. Figure 3, Figure 4 The primary outline of the structure includes a disk body (14) and a cone ring body A (19); A4. The workpiece is fixed in position and the rough machining tool is replaced with a finishing tool; the cone ring surface (12), the inner surface of the disk (20), and the cone top (13) are further machined; A5. The workpiece is fixed in position and the Figure 3 , Figure 4 The structure is processed by machining an axial hole (11) and a connecting mounting hole (15); the axial pin groove of the axial hole (11) is machined by a wire cutting machine tool.

[0029] The production method of the heat dissipation hoop (2) is as follows: B1. Figure 5 , Figure 6 The structure is formed by one-step casting; the material of the heat dissipation hoop (2) is: aluminum.

[0030] One of the production methods of combining the components: Fig. 9 In the pressing direction, a die is used to press the heat dissipation hoop (2) and the friction drum (1) into a self-heat dissipating wheel brake drum; the pressing die is formed according to Figure 1 , Figure 2 Structural processing and manufacturing.

[0031] The second production method for merging the components: using a cold pressing mold to cold press the heat sink hoop (2) and the friction drum (1) together; the cold pressing mold is based on Figure 1 , Figure 2 structural processing and manufacturing; the working temperature of the cold pressing mold is between minus 36 and minus 28 degrees; the pre-cooling storage temperature of the heat dissipation hoop (2) and the friction drum (1) is between minus 36 and minus 28 degrees; the pre-cooling storage time of the heat dissipation hoop (2) and the friction drum (1) is: 120-150 minutes; the pre-cooled heat dissipation hoop (2) and the friction drum (1) are pressed Fig. 9 A self-heat dissipating wheel brake drum of the present invention is formed by cold pressing in the pressing direction using a cold pressing die.

[0032] The third production method for merging the components: using a cold pressing mold to cold press the heat sink hoop (2) and the friction drum (1) together; the cold pressing mold is based on Figure 1 , Figure 2 structural processing and manufacturing; the working temperature of the cold pressing mold is between minus 65 and minus 50 degrees; the pre-cooling storage temperature of the heat dissipation hoop (2) and the friction drum (1) is between minus 65 and minus 50 degrees; the pre-cooling storage time of the heat dissipation hoop (2) and the friction drum (1) is: 160-280 minutes; the pre-cooled heat dissipation hoop (2) and the friction drum (1) are pressed Fig. 9 A self-heat dissipating wheel brake drum of the present invention is formed by cold pressing in the pressing direction using a cold pressing die.

[0033] The fourth production method for merging the components: using a hot pressing mold to hot press the heat sink hoop (2) and the friction drum (1) together; the hot pressing mold is based on Figure 1 , Figure 2 Structural processing and manufacturing; the working temperature of the hot pressing mold is set at 200-300 degrees; the heat dissipation hoop (2) and the friction drum (1) are preheated before hot pressing; the preheating temperature of the heat dissipation hoop (2) is: 280-360 degrees, and the preheating time is: 20-40 minutes; the preheating temperature of the friction drum (1) is: 200-300 degrees, and the preheating time is: 32-64 minutes; the preheating temperature of the friction drum (1) is lower than the preheating temperature of the heat dissipation hoop (2); the preheating temperature difference between the heat dissipation hoop (2) and the friction drum (1) is 80-120 degrees; after the heat dissipation hoop (2) and the friction drum (1) are preheated, they are hot-pressed with a hot pressing mold to form a self-heating wheel brake drum of the present invention.

[0034] The fifth production method for merging the components: using a hot pressing mold to hot press the heat sink hoop (2) and the friction drum (1) together; the hot pressing mold is based on Figure 1 , Figure 2 Structural processing and manufacturing; the working temperature of the hot pressing mold is set at 300-400 degrees; the heat dissipation hoop (2) and the friction drum (1) are preheated before hot pressing; the preheating temperature of the heat dissipation hoop (2) is: 360-480 degrees, and the preheating time is: 30-60 minutes; the preheating temperature of the friction drum (1) is: 280-360 degrees, and the preheating time is: 45-85 minutes; the preheating temperature of the friction drum (1) is lower than the preheating temperature of the heat dissipation hoop (2); the preheating temperature difference between the heat dissipation hoop (2) and the friction drum (1) is 80-120 degrees; after the heat dissipation hoop (2) and the friction drum (1) are preheated, they are hot-pressed with a hot pressing mold to form a self-heating wheel brake drum of the present invention.

[0035] exist Figure 1 , Figure 2 , Figure 8 In the embodiment, the heat dissipation hoop (2) and the friction drum (1) are pressed together to form a structure in which the right end of the heat dissipation fin (21) and the right end of the cone ring body B (22) of the heat dissipation hoop (2) are aligned with the right end of the cone ring body A (19) and the cone top (13) of the friction drum (1) in the same plane; after the pressing together, the riveting ring (27) of the heat dissipation fin (21) is compressed to fill the locking hoop buckle groove (16) of the friction drum (1).

Claims

1. A method for manufacturing a self-heat dissipating wheel brake drum, the self-heat dissipating wheel brake drum comprising a friction drum (1) and a heat dissipating hoop (2); characterized in that: The heat dissipation hoop (2) and the friction drum (1) are pressed together to form the self-heat dissipating wheel brake drum; The friction drum (1) comprises a disc outer surface (10), an axial hole (11), a conical ring surface (12), a conical top (13), a disc body (14), a connecting and mounting hole (15), a locking hoop buckle groove (16), a friction ring surface (17), a friction cavity (18), a conical ring body A (19), and a disc inner surface (20); The heat dissipation hoop (2) comprises a heat dissipation fin (21), a conical ring body B (22), a conical hole (23), an inner conical ring surface (24), an outer conical ring surface (25), and a heat dissipation groove (26); The friction drum (1) is mainly composed of a disc body (14) and a cone ring body A (19); the disc body (14) of the friction drum (1) is provided with an axial hole (11) and a connecting and mounting hole (15); the axial hole (11) is provided with an axial pin groove; a plurality of connecting and mounting holes (15) are arranged in an array around the axial hole (11), and the number of the connecting and mounting holes (15) is 3-12; the cone ring body A (19) is an annular wall body; the inner wall of the cone ring body A (19) is a friction ring surface (17), and the friction ring surface (17) and the inner surface (20) of the disc of the disc body (14) are perpendicular to each other; the cone ring body A (19) and the axial hole (11) of the disc body (14) have the same axis; ... body (14) are perpendicular to each other; the cone ring body A (19) and the axial hole (11) of the disc body (14) have the same axis; the friction ring surface (17) and the inner surface (20) of the disc body (14) are perpendicular to each other; the cone ring body A (19) and the axial hole (11) of the disc body (14) have the same axis; the friction ring surface (17) and the inner surface (20) of the disc body (14) are perpendicular to each other; the cone ring body A (19) and the inner surface (20) of the cone ring body (19) are perpendicular to each other; the cone ring body (19) and the inner surface (20) of the cone ring body (19) are perpendicular to each other; the cone ring body The axes of the axial holes (11) are parallel to each other; the outer wall surface of the cone ring body A (19) is a cone ring surface (12) with a taper, and the cone ring surface (12) and the axial hole (11) on the disk body (14) have the same axis; the taper of the cone ring surface (12) and the axis of the axial hole (11) in the disk body (14) is 1:7-12; the right end of the cone ring body A (19) is a cone top (13); the top surface of the cone top (13) is parallel to the outer surface (10) of the disk body (14), and the top surface of the cone top (13) and the axis of the axial hole (11) in the disk body (14) are perpendicular to each other; the functions of the cone ring body A (19) and the cone ring surface (12) are to facilitate the fitting and pressing of the heat dissipation hoop (2); the cone ring body A The left end of the friction drum (19) and the periphery of the disc body (14) are provided with a locking hoop buckle groove (16), the left angle of the groove bottom of the locking hoop buckle groove (16) is a right angle, the right angle of the groove bottom of the locking hoop buckle groove (16) is 75-136 degrees, and the number of the locking hoop buckle grooves (16) is 1-4; the locking hoop buckle groove (16) of the friction drum (1) is used to lock the heat dissipation hoop (2) after the friction drum (1) and the heat dissipation hoop (2) are combined, so that the friction drum (1) and the heat dissipation hoop (2) will not separate after being combined, thereby stabilizing the heat dissipation performance; The production method of the friction drum (1) is as follows: A1. Casting a blank according to the structure of the friction drum (1); the blank material is: gray iron; A2. According to the structure of the friction drum (1), the cast blank is turned by a lathe to use the outer surface (10) of the disc as a reference surface, and the edge of the outer surface (10) of the disc is processed to form a locking groove (16) according to the structure of the friction drum (1); A3. The blank is fixed on a boring machine for rough boring, and the rough boring is: cutting the conical ring surface (12), the inner surface (20) of the disc, and the cone top (13) of the friction drum (1) structure in sequence to form a primary outline of the friction drum (1) structure: a disc body (14) and a conical ring body A (19); A4. The workpiece is fixed in a position that remains unchanged, and the rough machining tool is replaced with a fine machining tool; and the conical ring surface (12), the inner surface (20) of the disc, and the cone top (13) are further processed; A5. The workpiece is fixed in a position that remains unchanged, and the shaft hole (11) and the connecting and mounting hole (15) are processed according to the structure of the friction drum (1).

2. The method for manufacturing a self-heat dissipating wheel brake drum according to claim 1, characterized in that: The production method of the heat dissipation hoop (2) is as follows: B1. The heat dissipation hoop (2) is cast once according to its structure; the material of the heat dissipation hoop (2) is: aluminum.

3. The method for manufacturing a self-heat dissipating wheel brake drum according to claim 2, characterized in that: A production method for merging components: a heat sink hoop (2) and a friction drum (1) are heat-pressed together by using a hot pressing mold; the hot pressing mold is manufactured according to the structure of a brake drum; the working temperature of the hot pressing mold is set at 300-400 degrees; the heat sink hoop (2) and the friction drum (1) are preheated before hot pressing; the preheating temperature of the heat sink hoop (2) is 360-480 degrees, and the preheating time is 30-60 minutes; the preheating temperature of the friction drum (1) is 280-360 degrees, and the preheating time is 45-85 minutes; the preheating temperature of the friction drum (1) is lower than the preheating temperature of the heat sink hoop (2); the preheating temperature difference between the heat sink hoop (2) and the friction drum (1) is 80-120 degrees; after the heat sink hoop (2) and the friction drum (1) are preheated, they are hot-pressed into the brake drum by using a hot pressing mold.

4. The method for manufacturing a self-heat dissipating wheel brake drum according to claim 1, characterized in that: After the pressing, the riveting ring (27) of the heat sink (21) is compressed to fill the locking hoop buckle groove (16) of the friction drum (1).

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