An automobile brake drum capable of preventing overheating

Abstract

The present invention discloses an overheat-resistant automobile brake drum, which relates to the technical field of automobile brake drums. The drum drum comprises a drum body, a positioning hole and a mounting hole formed on the outer wall of one side of the drum body, the outer wall of the drum body being respectively provided with a heat dissipation assembly, a positioning assembly, and reinforcing ribs for increasing the strength of the drum body. The heat dissipation assembly and the reinforcing ribs are evenly distributed in a circular pattern on the outer wall of the drum body, one end of the heat dissipation assembly is housed within the positioning assembly, and the positioning assembly and the reinforcing ribs are staggered on the outer wall of the drum body. In the present invention, the arc shape of the top of the heat sink can reduce air resistance, which is conducive to the rapid flow of air during heat exchange. The wavy first heat dissipation groove formed on one side of the heat sink not only extends the contact path between the air and the heat sink during heat exchange, but also increases the contact area between the heat sink and the air, significantly improving the heat dissipation efficiency of the heat sink on the drum body.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile brake drums, in particular to an automobile brake drum that is anti-overheating. Background Art

[0002] As a key component of the vehicle's braking system, the brake drum plays a vital role in the braking process. When braking, the brake shoes rub against the inner wall of the drum, slowing or stopping the vehicle through friction. However, under conditions such as frequent braking or prolonged downhill driving, the friction between the brake drum and the brake shoes generates a significant amount of heat. If this heat cannot be dissipated promptly, the brake drum temperature will rise sharply. Excessive temperatures can degrade the mechanical properties of the brake drum material, causing deformation of the drum and triggering thermal degradation of the brake shoes, resulting in reduced braking performance and a serious threat to driving safety.

[0003] After searching, the Chinese invention patent with announcement number CN108374853B discloses a high-efficiency heat dissipation brake drum, whose brake part is symmetrically provided with two arc-shaped grooves along its central axis, and each arc-shaped groove is provided with a high-temperature resistant heat dissipation layer fitted with its bottom end surface and a fastening plate fitted with the high-temperature resistant heat dissipation layer, a plurality of first ventilation holes are provided on the high-temperature resistant heat dissipation layer and the fastening plate, a plurality of second ventilation holes corresponding to and connected with the first ventilation holes are provided on the brake drum, and the first ventilation holes and the second ventilation holes form an integrated ventilation structure, wherein an air convection channel is formed between the integrated ventilation structure corresponding to one arc-shaped groove and the integrated ventilation structure corresponding to the other arc-shaped groove.

[0004] A review of existing technologies reveals the following deficiencies in the aforementioned patent: While the aforementioned patent dissipates heat by providing first and second ventilation holes in the brake drum, these holes reduce the effective bearing area of the brake drum, thereby reducing the overall structural strength of the brake drum. This makes the brake drum more susceptible to deformation and cracking during braking, threatening braking safety. Furthermore, the first and second ventilation holes expose the interior of the brake drum to direct air, accelerating the intrusion of moisture, dust, and corrosive gases, increasing the risk of corrosion and shortening the service life of the brake drum. Therefore, there is an urgent need for an automotive brake drum that prevents overheating to address the aforementioned issues. Summary of the Invention

[0005] In view of the problems in the related art, the present invention proposes an overheating-proof automobile brake drum to overcome the above-mentioned technical problems existing in the existing related art.

[0006] The technical solution of the present invention is achieved as follows:

[0007] An overheat-proof automobile brake drum comprises a drum body, a positioning hole and a mounting hole provided on an outer wall of one side of the drum body, wherein a heat dissipation component, a positioning component and reinforcing ribs for increasing the strength of the drum body are respectively provided on the circumferential outer wall of the drum body;

[0008] The heat dissipation components and the reinforcing ribs are evenly and circularly distributed on the circumferential outer wall of the drum body;

[0009] One end of the heat dissipation component is received in the interior of the positioning component;

[0010] The positioning components and the reinforcing ribs are staggeredly distributed on the circumferential outer wall of the drum body;

[0011] One end of the drum body is fixedly connected to a sealing ring plate, the cross section of the sealing ring plate is trumpet-shaped, and the sealing ring plate and the circumferential outer wall of the drum body form a sealing groove.

[0012] Furthermore, the heat dissipation assembly includes a heat sink arranged on the outer wall of the drum body, the top of the heat sink is arc-shaped, a first heat dissipation groove is provided on one side of the heat sink, the cross-section of the first heat dissipation groove is wavy, the bottom of the heat sink is fixedly connected to a vertical plate, and the outer walls on both sides of the vertical plate are provided with second heat dissipation grooves distributed at equal distances, and the cross-section of the second heat dissipation groove is semicircular.

[0013] Furthermore, a counterweight block is fixedly connected to the top of the heat sink, and a first arc-shaped groove is formed on the circumferential outer wall of the counterweight block.

[0014] Furthermore, the positioning assembly includes a circular frame fixedly connected to the circumferential outer wall of the drum body, the circumferential outer wall of the circular frame is provided with a movable groove, one end of the heat sink passes through the inside of the movable groove, the circumferential inner wall of the circular frame is fixedly connected to the limit frame, the bottom outer wall of the vertical plate is fixedly connected with an arc plate, the top of the arc plate is in contact with the circumferential inner wall of the circular frame, and the bottom of the arc plate is in contact with the top of the limit frame.

[0015] Furthermore, a card slot is provided on the bottom inner wall of the circular frame, a card plate is fixedly connected to the bottom outer wall of the arc plate, a through slot is provided on the top outer wall of the limit frame, one end of the card plate passes through the inside of the through slot, the card plate cooperates with the card slot, and elliptical holes distributed at equal distances are provided on the outer walls on both sides of the limit frame.

[0016] Furthermore, a circular groove is provided inside the heat sink, a spring is fixedly connected to the top inner wall of the circular groove, and the bottom end of the spring is fixedly connected to the top outer wall of the limit frame.

[0017] Furthermore, a friction block is fixedly connected to the inner wall of one side of the movable groove, a rectangular groove is opened on the outer wall of one side of the heat sink, and a friction pad is fixedly connected to the inner wall of one side of the rectangular groove, and friction resistance is generated between the friction pad and the friction block.

[0018] Furthermore, the outer walls on both sides of the circular frame are provided with ventilation slots which are equidistantly distributed in a circular pattern, the cross section of the ventilation slots is S-shaped, and the ventilation slots on both sides of the circular frame are staggered.

[0019] Furthermore, both ends of the reinforcing rib are fixedly connected to the circular frame, and the reinforcing rib includes a fan-shaped portion and a reinforcement portion. The number of the fan-shaped portions is two groups, and two fan-shaped portions are fixedly connected to the two ends of the reinforcement portion. The cross-section of the reinforcement portion is S-shaped, and the fan-shaped portion is fixedly connected to the circular frame.

[0020] Furthermore, a second arc-shaped groove is formed on the top outer wall of the reinforcement portion, and the second arc-shaped grooves are staggeredly distributed on the top outer wall of the reinforcement portion.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides an overheat-resistant automotive brake drum. By providing a heat dissipation assembly, when the vehicle brakes, the brake shoes rub against the inner wall of the drum, generating a large amount of heat. This heat is rapidly transferred to the heat dissipation assembly, which is tightly connected to the drum. Through the heat sink, sufficient heat exchange occurs with the air, accelerating heat dissipation within the drum and improving heat dissipation for the entire brake drum. The arc-shaped top of the heat sink reduces air resistance, facilitating rapid air flow during heat exchange. Furthermore, a wavy first heat dissipation groove on one side of the heat sink not only extends the contact path between the air and the heat sink during heat exchange, but also increases the contact area between the heat sink and the air, significantly improving the heat dissipation efficiency of the heat sink to the drum.

[0023] The present invention provides an automobile brake drum that prevents overheating. Through the arrangement of a positioning assembly, since ventilation grooves with staggered distribution and S-shaped cross-sections are provided on both sides of a circular ring frame in the positioning assembly, when the automobile is driving, air enters from the ventilation grooves on one side, changes its flow direction through the S-shaped channel, and after sufficient contact and heat exchange with the heat sink, flows out from the ventilation grooves on the other side, forming an efficient air circulation, further enhancing the heat dissipation effect. At the same time, the staggered layout of the ventilation grooves disrupts the air flow path, avoids the formation of dead zones for air flow, and promotes air to flow more evenly through the heat dissipation area, thereby improving the heat dissipation efficiency. Moreover, the elliptical holes on both sides of the limit frame can also promote air circulation and coordination with the ventilation grooves, and can quickly discharge the heat accumulated in the circular ring frame, thereby playing a good auxiliary role in the overall heat dissipation of the brake drum.

[0024] The present invention provides an automobile brake drum that prevents overheating. Through the cooperation of the heat dissipation component and the positioning component, more heat is generated when the automobile is traveling too fast and braking. During this process, when the automobile travels to a certain speed, the centrifugal force exerted on the heat sink overcomes the elastic force and friction resistance of the spring, thereby enabling the heat sinks on the outer wall of the drum body to spread to four groups. At this time, the part of the heat sink located in the circular frame will pass through the movable groove until the arc plate is pressed against the circumferential inner wall of the circular frame. At this time, as the heat sink spreads, the air resistance exerted on the entire brake drum is increased for a short time in exchange for increasing the area of exchange between the heat sink and the air, thereby enabling It can increase the heat exchange area of the heat sink while increasing the braking intensity of the car (i.e. high-speed braking), and realize the adaptive adjustment of the heat dissipation component to the brake drum. During the high-speed braking process of the car, the heat sink will lose its strong centrifugal force in an instant. At this time, the spring will immediately restore its deformation and pull the heat sink to reset it. In this process, the friction resistance generated between the friction block and the friction pad can greatly delay the reset efficiency of the heat sink, thereby effectively extending the heat exchange time between the heat sink and the air, improving the heat dissipation efficiency of the entire brake drum, and avoiding the situation where the heat sink is reset instantly and cannot fully dissipate the heat of the drum.

[0025] The present invention provides an automobile brake drum that prevents overheating. The fan-shaped portion of the reinforcement rib is fixed to the circular ring frame. Since the diameter of the fan-shaped portions at both ends is larger than the reinforcement portion in the middle, a larger contact area and supporting force can be provided, making the connection between the reinforcement rib and the circular ring frame more secure, effectively preventing displacement, deformation or falling off when subjected to force. At the same time, the stress distribution during braking can be more uniform, reducing stress concentration. When subjected to cyclic loads, the risk of premature fatigue cracking of the components can be reduced, and the service life of the components can be extended. The S-shaped reinforcement portion not only enhances the structural strength of the drum body, but also plays a good role in guiding air flow, reducing the air resistance encountered by the entire brake drum when rotating with the axle. The second arc-shaped grooves staggered on the top of the reinforcement portion increase the surface area to achieve auxiliary heat dissipation without reducing the structural strength. The staggered positioning components and reinforcement ribs can ensure efficient heat dissipation inside the drum body while reducing the wind resistance encountered by the brake drum when rotating, achieving a certain energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the overall front structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the overall back structure of the present invention.

[0029] Figure 3 It is a schematic diagram of the overall half-section three-dimensional structure of the present invention.

[0030] Figure 4 It is a schematic diagram of the overall half-section planar structure of the present invention.

[0031] Figure 5 It is an enlarged structural diagram of the heat dissipation component and positioning component of the present invention.

[0032] Figure 6 It is a schematic diagram of a partially cutaway enlarged structure of the circular ring frame of the present invention.

[0033] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0034] Figure 8 This is a schematic diagram of the structure of the heat dissipation component and the circular frame after being disassembled.

[0035] Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at point B in the middle.

[0036] Figure 10 This is a schematic diagram of the overall structure of the heat dissipation component and the positioning component of the present invention after being separated from the drum body surface.

[0037] Figure 11 For the present invention Figure 10 Schematic diagram of the enlarged structure at point C in the middle.

[0038] In the picture:

[0039] 1. Drum body; 2. Sealing ring plate; 3. Heat dissipation assembly; 301. Heat sink; 302. First heat dissipation groove; 303. Counterweight; 304. First arc-shaped groove; 305. Circular groove; 306. Arc-shaped plate; 307. Second heat dissipation groove; 308. Spring; 309. Friction block; 310. Vertical plate; 311. Clamping plate; 312. Friction pad; 313. Rectangular groove; 4. Reinforcement rib; 401. Fan-shaped part; 402. Reinforcement part; 403. Second arc-shaped groove; 5. Positioning assembly; 501. Circular frame; 502. Ventilation groove; 503. Movable groove; 504. Limiting frame; 505. Elliptical hole; 506. Clamping slot; 6. Positioning hole; 7. Mounting hole. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0041] According to an embodiment of the present invention, see Figures 1-11 An overheat-proof automobile brake drum includes a drum body 1, a positioning hole 6 and a mounting hole 7 formed on an outer wall of one side of the drum body 1, and a heat dissipation component 3, a positioning component 5, and a reinforcing rib 4 for increasing the strength of the drum body 1.

[0042] The heat dissipation components 3 and the reinforcing ribs 4 are evenly distributed in a circular shape on the circumferential outer wall of the drum body 1;

[0043] One end of the heat dissipation component 3 is received inside the positioning component 5;

[0044] The positioning components 5 and the reinforcing ribs 4 are staggeredly distributed on the circumferential outer wall of the drum body 1;

[0045] One end of the drum body 1 is fixedly connected to a sealing ring plate 2. The cross-section of the sealing ring plate 2 is trumpet-shaped. The sealing ring plate 2 and the circumferential outer wall of the drum body 1 form a sealing groove. When the brake drum is installed on the car, the drum body 1 is used to cooperate with the brake shoe to realize the braking function. The positioning hole 6 and the mounting hole 7 facilitate the precise installation and positioning of the brake drum. At the same time, the heat dissipation component 3, the positioning component 5 and the reinforcing rib 4 are distributed on the circumferential outer wall of the drum body 1. The heat dissipation component 3 realizes efficient heat dissipation. The positioning component 5 positions the heat dissipation component 3 and assists in heat dissipation, and the reinforcing rib 4 can enhance the strength of the drum body 1. The sealing ring plate 2 and the drum body 1 form a sealing groove to prevent dust, moisture and other impurities from entering the inside of the brake drum, thereby ensuring the normal working environment of the brake drum and extending its service life.

[0046] Preferably, the heat dissipation assembly 3 includes a heat sink 301 disposed on the outer circumferential wall of the drum body 1. The top of the heat sink 301 is arc-shaped, and a first heat sink 302 is defined on one side of the heat sink 301. The first heat sink 302 has a wavy cross-section. A vertical plate 310 is fixedly connected to the bottom of the heat sink 301. The outer walls of both sides of the vertical plate 310 each have equally spaced second heat sinks 307. The second heat sinks 307 have a semicircular cross-section. During operation of the brake drum, the heat sink 301 increases the contact area between the drum body 1 and the air, accelerating heat dissipation. The arc-shaped top design reduces air resistance during vehicle operation, promotes rapid air flow over the surface of the heat sink 301, and improves heat dissipation efficiency. The wavy shape of the first heat sink 302 extends the contact path between the air and the heat sink 301, increasing the contact area and significantly improving heat dissipation. The second heat sink 307 on the vertical plate 310 also increases the heat dissipation area, further enhancing heat dissipation capability.

[0047] Preferably, a counterweight 303 is fixedly connected to the top of the heat sink 301, and a first arc-shaped groove 304 is provided on the circumferential outer wall of the counterweight 303. The counterweight 303 can adjust the center of gravity distribution of the heat sink 301 so that the brake drum maintains balance when rotating at high speed, reducing vibration and noise. The first arc-shaped groove 304 can guide air flow to a certain extent to assist in heat dissipation.

[0048] Preferably, the positioning assembly 5 includes a circular frame 501 fixedly connected to the outer circumferential wall of the drum body 1, a movable groove 503 is opened on the outer circumferential wall of the circular frame 501, one end of the heat sink 301 passes through the inner circumferential wall of the movable groove 503, the inner circumferential wall of the circular frame 501 is fixedly connected to the limiting frame 504, the bottom outer wall of the vertical plate 310 is fixedly connected to the curved plate 306, the top of the curved plate 306 is in contact with the inner circumferential wall of the circular frame 501, and the bottom of the curved plate 306 is in contact with the limiting frame 504. The tops are fitted together, and the circular frame 501 is fixed to the outer wall of the drum body 1 to provide support and positioning for the heat sink 301, while the movable groove 503 allows one end of the heat sink 301 to pass through, thereby realizing the movable adjustment of the heat sink 301. At the same time, the limit frame 504 limits the moving range of the arc plate 306. The arc plate 306 is fitted with the sealing ring plate 2 and the limit frame 504. On the one hand, it ensures the stable installation of the heat sink 301, and on the other hand, it enables the arc plate 306 and the limit frame 504 to fully exchange heat.

[0049] Preferably, a card slot 506 is provided on the bottom inner wall of the circular frame 501, and a card plate 311 is fixedly connected to the bottom outer wall of the arc plate 306. A through slot is provided on the top outer wall of the limit frame 504, and one end of the card plate 311 passes through the inside of the through slot. The card plate 311 cooperates with the card slot 506. Elliptical holes 505 distributed at equal distances are provided on the outer walls on both sides of the limit frame 504. The card plate 311 cooperates with the card slot 506 to further fix the position of the arc plate 306 and enhance the installation stability of the heat dissipation component 3. The elliptical holes 505 on the limit frame 504 promote air circulation, accelerate the discharge of heat inside the circular frame 501, and assist in heat dissipation.

[0050] Preferably, a circular groove 305 is provided inside the heat sink 301, and a spring 308 is fixedly connected to the top inner wall of the circular groove 305. The bottom end of the spring 308 is fixedly connected to the top outer wall of the limit frame 504. The spring 308 connects the heat sink 301 and the limit frame 504. When the heat sink 301 expands outward due to centrifugal force, the spring 308 can pull the heat sink 301 to its original position when the centrifugal force disappears, thereby realizing automatic adjustment of the heat sink 301.

[0051] Preferably, a friction block 309 is fixedly connected to the inner wall of one side of the movable groove 503, a rectangular groove 313 is opened on the outer wall of one side of the heat sink 301, and a friction pad 312 is fixedly connected to the inner wall of one side of the rectangular groove 313. Friction resistance is generated between the friction pad 312 and the friction block 309. The friction block 309 and the friction pad 312 cooperate with each other to generate friction resistance during the resetting process of the heat sink 301, slowing down the resetting speed of the heat sink 301, extending the heat exchange time between the heat sink 301 and the air, and improving the heat dissipation efficiency.

[0052] Preferably, ventilation slots 502 are provided on both sides of the outer walls of the annular frame 501 at equal distances and in a circular distribution. The cross-section of the ventilation slots 502 is S-shaped. The ventilation slots 502 on both sides of the annular frame 501 are staggered. The ventilation slots 502 on both sides of the annular frame 501 are S-shaped and staggered. When the car is driving, the air forms a special flow path through the ventilation slots 502, fully contacts the heat sink 301, takes away heat, enhances the heat dissipation effect, and at the same time disrupts the air flow path to avoid the occurrence of air flow dead zones.

[0053] Preferably, both ends of the reinforcing rib 4 are fixedly connected to the annular frame 501. The reinforcing rib 4 includes a fan-shaped portion 401 and a reinforcement portion 402. The number of the fan-shaped portions 401 is two groups. The two fan-shaped portions 401 are fixedly connected to the two ends of the reinforcement portion 402. The cross-section of the reinforcement portion 402 is S-shaped. The fan-shaped portion 401 is fixedly connected to the annular frame 501. The fan-shaped portion 401 of the reinforcing rib 4 is fixedly connected to the annular frame 501, which increases the connection area and improves the connection stability. The S-shaped design of the reinforcement portion 402 enhances the structural strength of the drum body 1, and at the same time plays a diversion role, reducing the air resistance when the brake drum rotates.

[0054] Preferably, a second arc-shaped groove 403 is provided on the top outer wall of the reinforcement part 402, and the second arc-shaped grooves 403 are staggered on the top outer wall of the reinforcement part 402. The second arc-shaped grooves 403 on the top of the reinforcement part 402 are staggered, which increases the surface area without reducing the structural strength, realizes auxiliary heat dissipation, and works together with the heat dissipation component 3 and the positioning component 5 to improve the overall heat dissipation performance of the brake drum.

[0055] In summary, with the aid of the above-mentioned technical solution of the present invention, the brake drum is fixed to the wheel axle by screws and bolts. When the vehicle brakes, the brake shoe rubs against the inner wall of the drum body 1, thereby generating a large amount of heat. This heat is quickly transferred to the heat dissipation component 3 closely connected to the drum body 1, and sufficient heat exchange is carried out with the air through the heat sink 301, thereby accelerating the dissipation of heat inside the drum body 1 and improving the heat dissipation effect of the entire brake drum. The arc shape of the top of the heat sink 301 can reduce air resistance, which is conducive to the rapid flow of air during the heat exchange process. The wavy first heat dissipation groove 302 provided on one side of the heat sink 301 not only extends the contact path between the air and the heat sink 301 during heat exchange, but also increases the contact area between the heat sink 301 and the air, significantly improving the heat dissipation efficiency of the heat sink 301 on the drum body 1.

[0056] At the same time, since the circular frame 501 in the positioning component 5 is provided with staggered ventilation slots 502 with S-shaped cross sections on both sides, when the car is driving, air enters from the ventilation slots 502 on one side, changes its flow direction through the S-shaped channel, and after sufficient contact and heat exchange with the heat sink 301, flows out from the ventilation slots 502 on the other side, forming an efficient air circulation, further enhancing the heat dissipation effect. At the same time, the staggered layout of the ventilation slots 502 disrupts the air flow path, avoids the formation of dead zones for air flow, and promotes air to flow more evenly through the heat dissipation area, thereby improving the heat dissipation efficiency. Moreover, the elliptical holes 505 on both sides of the limiting frame 504 can also promote air circulation and cooperate with the ventilation slots 502 to quickly discharge the heat accumulated in the circular frame 501, thereby playing a good auxiliary role in the overall heat dissipation of the brake drum.

[0057] When the car brakes while traveling too fast, more heat is generated. During this process, when the car reaches a certain speed, the centrifugal force acting on the heat sink 301 overcomes the elastic force and frictional resistance of the spring 308, thereby causing the heat sink 301 on the outer wall of the drum body 1 to spread out to the four groups. At this time, the portion of the heat sink 301 located within the annular frame 501 passes through the movable groove 503 until the arc-shaped plate 306 abuts against the circumferential inner wall of the annular frame 501. At this time, as the heat sink 301 spreads out, the air resistance acting on the entire brake drum increases for a short period of time, thereby increasing the area of air exchange between the heat sink 301 and the air. This allows the heat exchange area of the heat sink 301 to be increased while the car's braking intensity is increased (i.e., high-speed braking), thereby achieving adaptive adjustment of the heat dissipation of the brake drum by the heat dissipation assembly 3.

[0058] During high-speed braking of the vehicle, the heat sink 301 will instantly lose its strong centrifugal force. At this time, the spring 308 will immediately recover its deformation and pull the heat sink 301 to reset. During this process, the friction resistance generated between the friction block 309 and the friction pad 312 can greatly delay the reset efficiency of the heat sink 301, thereby effectively extending the heat exchange time between the heat sink 301 and the air, improving the heat dissipation efficiency of the entire brake drum, and avoiding the situation where the heat sink 301 is instantly reset and cannot fully dissipate heat from the drum body 1.

[0059] The fan-shaped portions 401 of the reinforcing rib 4 are fixed to the annular frame 501, and the diameter of the fan-shaped portions 401 at both ends is larger than the reinforcing portion 402 in the middle, thereby providing a larger contact area and supporting force, making the connection between the reinforcing rib 4 and the annular frame 501 more secure, effectively preventing displacement, deformation or falling off when subjected to force, and at the same time making the stress distribution during braking more uniform, reducing stress concentration. When subjected to cyclic loads, it can reduce the risk of premature fatigue cracking of the components and extend the service life of the components. The S-shaped reinforcing portion 402 not only enhances the structural strength of the drum body 1, but also serves as an excellent air guide, reducing the air resistance encountered by the entire brake drum when rotating with the axle. The staggered second arcuate grooves 403 on the top of the reinforcing portion 402 increase the surface area for auxiliary heat dissipation without reducing the structural strength. The staggered positioning components 5 and reinforcing ribs 4 can ensure efficient heat dissipation inside the drum body 1 while reducing the wind resistance encountered by the brake drum during rotation, achieving a certain energy-saving effect.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automobile brake drum for preventing overheating, comprising a drum body (1), a positioning hole (6) and a mounting hole (7) provided on an outer wall of one side of the drum body (1), characterized in that: The circumferential outer wall of the drum body (1) is respectively provided with a heat dissipation component (3), a positioning component (5), and a reinforcing rib (4) for increasing the strength of the drum body (1); The heat dissipation components (3) and the reinforcing ribs (4) are evenly distributed in a circular pattern on the circumferential outer wall of the drum body (1); One end of the heat dissipation component (3) is received inside the positioning component (5); The positioning components (5) and the reinforcing ribs (4) are distributed in a staggered manner on the circumferential outer wall of the drum body (1); One end of the drum body (1) is fixedly connected to a sealing ring plate (2), the cross section of the sealing ring plate (2) is trumpet-shaped, and the sealing ring plate (2) and the circumferential outer wall of the drum body (1) form a sealing groove. The heat dissipation component (3) includes a heat sink (301) arranged on the circumferential outer wall of the drum body (1), the top of the heat sink (301) is arc-shaped, and a first heat dissipation groove (302) is opened on one side of the heat sink (301), and the cross section of the first heat dissipation groove (302) is wavy. The bottom of the heat sink (301) is fixedly connected to a vertical plate (310), and the outer walls of both sides of the vertical plate (310) are each provided with a second heat dissipation groove (307) distributed at equal distances, and the cross section of the second heat dissipation groove (307) is semicircular. The positioning component (5) includes a circular frame (501) fixedly connected to the circumferential outer wall of the drum body (1). ), a movable groove (503) is provided on the circumferential outer wall of the annular frame (501), one end of the heat sink (301) passes through the inside of the movable groove (503), the circumferential inner wall of the annular frame (501) is fixedly connected to the limit frame (504), a circular groove (305) is provided on the inside of the heat sink (301), a spring (308) is fixedly connected to the top inner wall of the circular groove (305), the bottom end of the spring (308) is fixedly connected to the top outer wall of the limit frame (504), a friction block (309) is fixedly connected to the inner wall of one side of the movable groove (503), a rectangular groove (313) is provided on the outer wall of one side of the heat sink (301), a friction pad (312) is fixedly connected to the inner wall of one side of the rectangular groove (313), and friction resistance is generated between the friction pad (312) and the friction block (309).

2. The overheat-proof automobile brake drum according to claim 1, characterized in that: A counterweight (303) is fixedly connected to the top of the heat sink (301), and a first arc-shaped groove (304) is provided on the circumferential outer wall of the counterweight (303).

3. The overheat-proof automobile brake drum according to claim 2, characterized in that: The bottom outer wall of the vertical plate (310) is fixedly connected to a curved plate (306), the top of the curved plate (306) is in contact with the circumferential inner wall of the annular frame (501), and the bottom of the curved plate (306) is in contact with the top of the limiting frame (504).

4. The overheat-proof automobile brake drum according to claim 3, characterized in that: A card slot (506) is provided on the bottom inner wall of the circular frame (501), a card plate (311) is fixedly connected to the bottom outer wall of the arc plate (306), a through slot is provided on the top outer wall of the limit frame (504), one end of the card plate (311) passes through the inside of the through slot, the card plate (311) cooperates with the card slot (506), and elliptical holes (505) distributed at equal distances are provided on the outer walls on both sides of the limit frame (504).

5. The overheat-proof automobile brake drum according to claim 4, characterized in that: The outer walls of both sides of the annular frame (501) are provided with ventilation slots (502) distributed in a circular pattern at equal distances. The cross-section of the ventilation slots (502) is S-shaped. The ventilation slots (502) provided on both sides of the annular frame (501) are staggered.

6. The overheat-proof automobile brake drum according to claim 5, characterized in that: Both ends of the reinforcing rib (4) are fixedly connected to the annular frame (501). The reinforcing rib (4) comprises a fan-shaped portion (401) and a reinforcement portion (402). The fan-shaped portions (401) are provided in two groups. The two fan-shaped portions (401) are fixedly connected to the two ends of the reinforcement portion (402). The cross section of the reinforcement portion (402) is S-shaped. The fan-shaped portions (401) are fixedly connected to the annular frame (501).

7. The overheat-proof automobile brake drum according to claim 6, characterized in that: The top outer wall of the reinforcement portion (402) is provided with second arc-shaped grooves (403), and the second arc-shaped grooves (403) are distributed in a staggered manner on the top outer wall of the reinforcement portion (402).

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