Hub bearing with efficient heat dissipation structure

Abstract

The utility model discloses a hub bearing with a high-efficiency heat dissipation structure, which belongs to the technical field of hub bearings, and is characterized by comprising an outer ring and two inner rings, the two inner rings are respectively positioned on the front side and the rear side in the outer ring, the two inner rings and the outer ring are coaxially arranged, a retainer is arranged on the outer side of each inner ring, and the retainer is arranged on the outer side of each inner ring. Through the arrangement of the inner heat dissipation assembly, the unique spiral heat dissipation channel and the communicating circulation opening, a penetrating type heat dissipation path is constructed between the two inner rings, and the inlet and the outlet in the outer sides of the two inner rings are combined to form a complete air circulation channel, so that air flows in from one inlet and outlet, and the heat dissipation efficiency is improved. After being guided by the spiral heat dissipation channel and the circulation opening of the inner ring, the air is discharged through the other inlet and outlet, so that the heat dissipation area and the air flow path are effectively increased, heat of the inner ring and a ball contact area is quickly taken away, heat accumulation is reduced, and lubricating grease failure or bearing structure damage caused by high temperature is avoided.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub bearing technology, and in particular to a wheel hub bearing with a high-efficiency heat dissipation structure. Background Technology

[0002] As a key automotive component, wheel bearings are used to support wheels, bear vehicle loads, and provide precise guidance for wheel rotation. They must withstand both axial and radial loads simultaneously. During operation, they generate heat due to friction, and their heat dissipation performance has a significant impact on service life and driving safety.

[0003] The existing method of injecting lubricating oil into automotive wheel hub bearings requires removing the seal ring, injecting lubricating oil, and then reinstalling the seal ring to prevent the lubricating oil from being splashed out during bearing rotation. However, repeatedly removing and reinstalling the seal ring not only increases the time required for injecting lubricating oil, but also causes damage to the seal ring during the process.

[0004] An existing patent (publication number: CN220151720U) discloses an automobile wheel hub shaft. This utility model uses a syringe inserted into an injection hole. The syringe is gradually rotated and penetrates deeper through the threaded groove. After the syringe contacts the rotating disk, the rotating disk rotates, thereby causing the sealing plate to unfold outward and opening the feed groove. This allows lubricating oil to smoothly enter the bearing to lubricate the balls, preventing lubricating oil from leaking out when the bearing rotates. It also saves time on the repeated disassembly and reassembly of the sealing ring and prevents the sealing ring from being damaged during disassembly.

[0005] To address the aforementioned issues, existing patents have provided solutions. However, existing wheel hub bearings suffer from insufficient heat dissipation, making it difficult to quickly dissipate heat from high-temperature areas such as the inner ring and ball contact points. This results in significant heat accumulation, which can easily cause bearing failure due to overheating under high-load conditions.

[0006] Therefore, a hub bearing with a high-efficiency heat dissipation structure is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a wheel hub bearing with a high-efficiency heat dissipation structure, which can solve the problem of insufficient heat dissipation in existing wheel hub bearings. This makes it difficult to quickly dissipate heat from high-temperature areas such as the inner ring and ball contact area, resulting in significant heat accumulation and easy for the bearing to fail due to overheating under high load conditions.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hub bearing with a high-efficiency heat dissipation structure, comprising an outer ring and an inner ring, wherein two inner rings are provided, located on the front and rear sides inside the outer ring respectively, and both inner rings are coaxially arranged with the outer ring. A cage is provided on the outer side of the inner ring, and a ball is rotatably connected to the outer side of the cage. The inner side of the ball contacts the outer side of the inner ring, and the outer side of the ball contacts the inner wall of the outer ring. An internal heat dissipation component is provided on both the inner and outer sides of the inner ring, and an external heat dissipation structure is provided on the outer side of the outer ring.

[0009] The internal heat dissipation assembly includes a spiral heat dissipation channel formed inside the inner ring. An inlet and outlet are formed on the outer side of the inner ring, and the inner side of the inlet and outlet is connected to the outer side of the spiral heat dissipation channel. A flow port is formed on the inner side of the inner ring, and the outer side of the flow port is connected to the inner side of the spiral heat dissipation channel. Adjacent flow ports are connected to each other. A closed ventilation structure is provided on the outer side of the inner ring.

[0010] Preferably, the external heat dissipation structure includes a heat-conducting ring fixedly connected to the outside of the outer ring, and the heat-conducting ring is made of aluminum alloy or copper alloy.

[0011] Preferably, a support ring is welded to both the front and rear sides of the outer side of the heat-conducting ring, and a fixing rod is fixedly connected to the inner side of the support ring.

[0012] Preferably, a heat dissipation fin ring is provided on the outer side of the fixing rod, and the inner end face of the heat dissipation fin ring is in contact with the outer end face of the heat conduction ring.

[0013] Preferably, the enclosed ventilation structure includes a ventilation and dustproof net fixedly connected to the outer side of the inner ring. The ventilation and dustproof net is located outside the inlet and outlet, and the mesh diameter of the ventilation and dustproof net is less than 0.5 mm.

[0014] Preferably, a rubber sealing ring is provided on the outer side of the inner ring, the rubber sealing ring is located in the groove of the inner wall of the outer ring, and dustproof sealing caps are snapped on the front and rear sides between the inner ring and the outer ring, and the inner edge of the dustproof sealing cap is in sealing contact with the outer end face of the rubber sealing ring.

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

[0016] 1. This application sets up an internal heat dissipation component, with a unique spiral heat dissipation channel and a connecting flow port to build a through heat dissipation path between the two inner rings. Combined with the inlet and outlet ports on the outer side of the two inner rings, a complete air circulation channel is formed. Air flows in from one of the inlet and outlet ports, is guided by the spiral heat dissipation channel and the flow port of the inner ring, and then is discharged through the other inlet and outlet port. This effectively increases the heat dissipation area and airflow path, quickly removes heat from the inner ring and the area in contact with the ball bearing, reduces heat accumulation, and avoids grease failure or bearing structure damage due to high temperature.

[0017] 2. This application sets up an external heat dissipation structure, which works in conjunction with the internal heat dissipation components to form a dual heat dissipation system. After the heat from the inner ring is transferred to the outer ring, the external heat dissipation structure quickly diffuses the heat to the outside, significantly improving the heat dissipation capacity of the wheel hub bearing under high load conditions, extending the bearing's service life, and providing reliable protection for driving safety. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the wheel hub bearing with a high-efficiency heat dissipation structure according to this utility model.

[0019] Figure 2 This is a structural diagram of the outer ring of this utility model;

[0020] Figure 3 This is a structural diagram of the internal heat dissipation component of this utility model;

[0021] Figure 4 This is a structural diagram of the closed ventilation structure of this utility model;

[0022] Figure 5 This is a structural diagram of the external heat dissipation structure of this utility model;

[0023] Figure 6 This is a structural diagram of the inner ring of this utility model.

[0024] In the diagram, 1. Outer ring; 2. Inner ring; 3. Cage; 4. Ball bearing; 5. Inner heat dissipation assembly; 51. Spiral heat dissipation channel; 52. Inlet and outlet; 53. Flow port; 54. Enclosed ventilation structure; 541. Ventilation and dustproof mesh; 542. Rubber sealing ring; 543. Dustproof sealing cover; 6. Outer heat dissipation structure; 61. Heat conduction ring; 62. Support ring; 63. Fixing rod; 64. Heat dissipation fin ring; 7. Ventilation hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 The present invention provides the following technical solution:

[0027] A hub bearing with a high-efficiency heat dissipation structure includes an outer ring 1 and an inner ring 2. There are two inner rings 2, located on the front and rear sides inside the outer ring 1, respectively. The two inner rings 2 are coaxially arranged with the outer ring 1. A cage 3 is provided on the outer side of the inner ring 2. A ball 4 is rotatably connected to the outer side of the cage 3. The inner side of the ball 4 contacts the outer side of the inner ring 2, and the outer side of the ball 4 contacts the inner wall of the outer ring 1. An internal heat dissipation component 5 is provided on both the inner and outer sides of the inner ring 2, and an external heat dissipation structure 6 is provided on the outer side of the outer ring 1.

[0028] The internal heat dissipation component 5 includes a spiral heat dissipation channel 51 opened inside the inner ring 2. An inlet and outlet 52 is opened on the outer side of the inner ring 2. The inner side of the inlet and outlet 52 is connected to the outer side of the spiral heat dissipation channel 51. A flow port 53 is opened on the inner side of the inner ring 2. The outer side of the flow port 53 is connected to the inner side of the spiral heat dissipation channel 51, and adjacent flow ports 53 are connected to each other. A closed ventilation structure 54 is provided on the outer side of the inner ring 2.

[0029] In this embodiment: by setting up an inner heat dissipation component 5 and an outer heat dissipation structure 6, when the hub bearing is in operation, the heat generated by the friction between the inner ring 2 and the ball 4 is first absorbed by the inner heat dissipation component 5. Specifically, outside cold air enters the spiral heat dissipation channel 51 from the inlet and outlet 52. The spiral structure of the spiral heat dissipation channel 51 extends the airflow path and increases the heat exchange area. After absorbing the heat of the inner ring 2 during the flow, the air enters the spiral heat dissipation channel 51 of the other inner ring 2 through the connected flow port 53, further enhancing the heat exchange. Finally, the hot air exits from the other inlet and outlet. The heat is discharged from the inner ring 2 and the balls 4, forming a continuous heat dissipation cycle. At the same time, the heat emitted by the inner ring 2 and the balls 4 is transferred to the outer ring 1. The outer heat dissipation structure 6 absorbs the heat from the outer ring 1 through its high thermal conductivity material and expanded heat dissipation surface area, and then quickly diffuses the heat to the external environment. The inner heat dissipation component 5 and the outer heat dissipation structure 6 work together to ensure that the heat of the wheel hub bearing can be dissipated in a timely and efficient manner under high load conditions, effectively reducing the bearing temperature and avoiding the decline in grease performance and structural damage caused by heat accumulation, thereby significantly improving the reliability and service life of the bearing.

[0030] Specifically, such as Figure 5As shown, the external heat dissipation structure 6 includes a heat-conducting ring 61 fixedly connected to the outside of the outer ring 1. The heat-conducting ring 61 is made of aluminum alloy or copper alloy.

[0031] Specifically, such as Figure 5 As shown, support rings 62 are welded to both the front and rear sides of the outer side of the heat-conducting ring 61, and a fixing rod 63 is fixedly connected to the inner side of the support ring 62.

[0032] Specifically, such as Figure 5 As shown, a heat dissipation fin ring 64 is provided on the outer side of the fixing rod 63, and the inner end face of the heat dissipation fin ring 64 is in contact with the outer end face of the heat conduction ring 61.

[0033] In this embodiment: by setting an external heat dissipation structure 6, the heat conduction ring 61 is made of aluminum alloy or copper alloy high thermal conductivity material, which quickly absorbs the heat transferred by the outer ring 1 and efficiently conducts it to the surface. The support ring 62 and the fixing rod 63 form a stable support frame to ensure the installation strength and stability of the heat dissipation fin ring 64. The heat dissipation fin ring 64 significantly improves the heat exchange efficiency by increasing the contact area with the air. When the vehicle is running, the flowing air can quickly carry away the heat on the surface of the heat dissipation fin ring 64, accelerating the heat diffusion to the outside. Together with the internal heat dissipation component 5, it forms a complete heat dissipation system, effectively reducing the overall temperature of the bearing and improving the reliability under high load conditions.

[0034] Specifically, such as Figure 4 As shown, the closed ventilation structure 54 includes a ventilation and dustproof net 541 fixedly connected to the outside of the inner ring 2. The ventilation and dustproof net 541 is located outside the inlet and outlet 52, and the mesh diameter of the ventilation and dustproof net 541 is less than 0.5 mm.

[0035] Specifically, such as Figure 4 As shown, a rubber sealing ring 542 is provided on the outer side of the inner ring 2. The rubber sealing ring 542 is located in the groove of the inner wall of the outer ring 1. Dustproof sealing covers 543 are snapped on the front and rear sides between the inner ring 2 and the outer ring 1. The inner edge of the dustproof sealing cover 543 is in sealing contact with the outer end face of the rubber sealing ring 542.

[0036] In this embodiment: by setting up a closed ventilation structure 54, the ventilation and dustproof mesh 541 is designed with a mesh size of less than 0.5mm. While ensuring that air can pass normally through the inlet and outlet 52 into and out of the spiral heat dissipation channel 51 and maintain the circulation of heat dissipation airflow, it effectively blocks the entry of external dust, sand and other foreign objects, preventing the spiral heat dissipation channel 51 from becoming blocked. The rubber sealing ring 542 and the dustproof sealing cover 543 fit tightly together, forming a double sealing structure between the inner ring 2 and the outer ring 1, further isolating external pollutants, preventing foreign objects from entering the interior, reducing the wear of components such as the ball bearing 4 and the cage 3, and preventing grease leakage, ensuring stable bearing lubrication performance and extending service life.

[0037] Specifically, such as Figure 5 As shown, ventilation holes 7 are provided on the outer side of the heat dissipation fin ring 64, and the ventilation holes 7 are circular slots.

[0038] In this embodiment: By setting ventilation holes 7, which are evenly distributed on the outer side of the heat dissipation fin ring 64, on the one hand, the air stagnation layer on the surface of the heat dissipation fin ring 64 is broken, allowing air to flow more smoothly over the surface of the heat dissipation fin ring 64, enhancing the air convection effect and increasing the heat dissipation speed. On the other hand, the ventilation holes 7 can reduce the overall weight of the heat dissipation fin ring 64, reducing the additional load without affecting the structural strength, and also helping to form air vortices, promoting the mixing of hot air and cold air from the outside, further improving the heat dissipation efficiency.

[0039] Working Principle: In the actual use of a wheel hub bearing with a high-efficiency heat dissipation structure, the inner ring 2 generates a large amount of heat through friction with the balls 4 during bearing operation. Meanwhile, cool air from the outside enters the spiral heat dissipation channel 51 through the inlet / outlet 52 on the outer side of the inner ring 2. The spiral design extends the airflow path, allowing for thorough heat exchange with the inner ring 2. After absorbing heat, the air enters the spiral heat dissipation channel 51 of the other inner ring 2 through the connecting outlet 53, further enhancing heat dissipation. Finally, the hot air is discharged from the other inlet / outlet 52, achieving efficient heat removal. The heat conducted to the outer ring 1 is quickly absorbed and conducted to the surface by the heat-conducting ring 61 on the outer side of the outer ring 1, thanks to the high thermal conductivity of aluminum or copper alloy. The support ring 62 and the fixing rod 63 form a stable frame, ensuring the installation strength of the heat dissipation fin ring 64. By increasing the contact area with air, the heat dissipation fin ring 64 quickly carries away surface heat with the help of flowing air during vehicle operation. Accelerating the diffusion to the outside, the closed ventilation structure 54 operates synchronously. Its ventilation and dustproof net 541, with a mesh size of less than 0.5mm, ensures the circulation of heat dissipation airflow while blocking external dust, gravel, and other foreign objects from entering the spiral heat dissipation channel 51, thus preventing channel blockage. The rubber sealing ring 542 and the dustproof sealing cover 543 form a double seal, isolating external pollutants and preventing foreign objects from intruding and wearing the ball bearing 4 and cage 3 between the inner ring 2 and the outer ring 1. At the same time, it prevents grease leakage and maintains the bearing lubrication performance. In addition, the circular ventilation holes 7 on the outer side of the heat dissipation fin ring 64 further optimize the heat dissipation effect. The evenly distributed ventilation holes 7 break the air stagnation layer, enhance air convection, and increase the heat dissipation speed. At the same time, it reduces the weight of the heat dissipation fin ring 64 and reduces the additional load. The air vortex it forms can also promote the mixing of hot and cold air, further improving the overall heat dissipation efficiency. The whole system works in synergy to achieve efficient heat dissipation and stable operation of the wheel hub bearing.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wheel hub bearing with high-efficiency heat dissipation structure, comprising an outer ring (1) and an inner ring (2), characterized in that: Two inner rings (2) are provided, located on the front and rear sides inside the outer ring (1) respectively. The two inner rings (2) and the outer ring (1) are coaxially arranged. A retainer (3) is provided on the outer side of the inner ring (2). A ball (4) is rotatably connected to the outer side of the retainer (3). The inner side of the ball (4) contacts the outer side of the inner ring (2). The outer side of the ball (4) contacts the inner wall of the outer ring (1). An internal heat dissipation component (5) is provided inside and outside the inner ring (2). An external heat dissipation structure (6) is provided on the outer side of the outer ring (1). The internal heat dissipation assembly (5) includes a spiral heat dissipation channel (51) opened inside the inner ring (2). An inlet and outlet (52) is opened on the outer side of the inner ring (2). The inner side of the inlet and outlet (52) is connected to the outer side of the spiral heat dissipation channel (51). A flow port (53) is opened on the inner side of the inner ring (2). The outer side of the flow port (53) is connected to the inner side of the spiral heat dissipation channel (51), and adjacent flow ports (53) are connected to each other. A closed ventilation structure (54) is provided on the outer side of the inner ring (2).

2. The wheel hub bearing with a high-efficiency heat dissipation structure according to claim 1, characterized in that: The external heat dissipation structure (6) includes a heat-conducting ring (61) fixedly connected to the outside of the outer ring (1), and the heat-conducting ring (61) is made of aluminum alloy or copper alloy.

3. A hub bearing with a high-efficiency heat dissipation structure according to claim 2, characterized in that: Support rings (62) are welded to the front and rear sides of the outer side of the heat-conducting ring (61), and a fixing rod (63) is fixedly connected to the inner side of the support ring (62).

4. A hub bearing with a high-efficiency heat dissipation structure according to claim 3, characterized in that: A heat dissipation fin ring (64) is provided on the outer side of the fixing rod (63), and the inner end face of the heat dissipation fin ring (64) is in contact with the outer end face of the heat conduction ring (61).

5. A hub bearing with a high-efficiency heat dissipation structure according to claim 1, characterized in that: The closed ventilation structure (54) includes a ventilation and dustproof net (541) fixedly connected to the outside of the inner ring (2). The ventilation and dustproof net (541) is located outside the inlet and outlet (52), and the mesh diameter of the ventilation and dustproof net (541) is less than 0.5 mm.

6. A hub bearing with a high-efficiency heat dissipation structure according to claim 5, characterized in that: A rubber sealing ring (542) is provided on the outer side of the inner ring (2). The rubber sealing ring (542) is located in the groove of the inner wall of the outer ring (1). Dustproof sealing caps (543) are snapped on the front and rear sides of the inner ring (2) and the outer ring (1). The inner edge of the dustproof sealing cap (543) is in sealing contact with the outer end face of the rubber sealing ring (542).

7. A hub bearing with a high-efficiency heat dissipation structure according to claim 4, characterized in that: Ventilation holes (7) are provided on the outer side of the heat dissipation fin ring (64), and the ventilation holes (7) are circular slots.

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