Long-service-life hub bearing unit with outer dustproof cover

Abstract

The long-service-life hub bearing unit with the outer dust cover comprises a flange plate, a steering knuckle and a driving shaft, the steering knuckle is connected to one side of the flange plate, wheel bolts are arranged at the two ends of the flange plate, a locking nut is arranged in the center of the flange plate, the driving shaft is arranged on one side of the locking nut, and the driving shaft is arranged on the other side of the locking nut. A hub bearing is arranged on one side of the driving shaft, roller paths are arranged on the two sides of the steering knuckle, rollers are arranged in the roller paths, a clamping spring is connected to one side of each roller path, a static magnetic ring is arranged on one side of the steering knuckle, and a dustproof cover is connected to one side of each static magnetic ring. A sealing ring is arranged at the joint of the dustproof cover and the static magnetic ring, the dustproof cover is fixed through magnetic force, meanwhile, the operation stability and safety of the hub unit are improved through the sealing ring arranged at the joint, internal air pressure balance can be kept through the design of the sawtooth-shaped surface of the dustproof cover and vent holes, invasion of dust and pollutants can be effectively prevented, and the service life of the hub unit is prolonged. The service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub units, in particular to a long-life wheel hub bearing unit with an external dust cover. Background Art

[0002] The wheel hub unit is one of the important components that drives the tires on a car. It can drive the tires to move and turn through the drive of the mechanical structure. In daily use, the wheel hub structure is close to the ground, so it is easy for dust to enter through the gaps in the wheel hub unit, causing damage to parts and reducing their service life.

[0003] According to the patent authorization announcement number CN219505780U, a car hub unit with a dust cover includes a flange, an outer ring is provided on the outer diameter surface of the flange, an inner ring is provided between the flange and the outer ring, a first sealing ring is provided between the edges of the flange and the outer ring, a sealing groove is provided at the inner end of the outer ring, an end cover is transversely provided in the middle of the flange, a dust cover is provided on the inner side of the end cover, one side of the first sealing ring is fixed on the flange, a second sealing ring and a third sealing ring are respectively provided between the flange and the outer ring, and an inflatable sealing ring is provided on one side of the dust cover. By inflating the inflatable sealing ring, the diameter of the inflatable sealing ring becomes larger, and the inflatable sealing ring is tightly fitted with the sealing groove to ensure that the end cover of the device is tightly fitted with the wheel hub, thereby ensuring the sealing between the end cover and the wheel hub, preventing pollutants such as dust and powder from entering the bearing from the gap, causing the pollutants to seriously affect the service life of various components inside the bearing.

[0004] However, the above-mentioned device uses an inflatable sealing ring to tightly connect the dust cover and the hub unit during use, which has poor adaptability to the environmental temperature. When exposed to ultraviolet rays for a long time, the material of the inflatable ring may age, resulting in a decrease in its elasticity and sealing performance and a reduction in its service life. Therefore, in view of this, research and improvement are conducted on the existing structure and deficiencies, and a long-life hub bearing unit with an external dust cover is proposed to achieve a more practical purpose. Utility Model Content

[0005] The purpose of the utility model is to provide a long-life wheel hub bearing unit with an external dust cover, so as to solve the problem proposed in the above-mentioned background technology that the above-mentioned dust cover uses an inflatable sealing ring to tightly connect the dust cover and the wheel hub unit during use, has poor adaptability to the temperature of the environment, and is exposed to ultraviolet rays for a long time, and the material of the inflatable ring may age, resulting in a decrease in its elasticity and sealing performance and a reduction in its service life.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a long-life wheel hub bearing unit with an external dust cover, comprising a flange, a steering knuckle and a drive shaft, characterized in that: a steering knuckle is connected to one side of the flange, wheel bolts are arranged at both ends of the flange, a locking nut is arranged at the center of the flange, a drive shaft is arranged on one side of the locking nut, a wheel hub bearing is arranged on one side of the drive shaft, raceways are arranged on both sides of the steering knuckle, rollers are arranged inside the raceways, two groups of rollers are arranged, and the two groups of rollers are evenly arranged along the horizontal direction of the raceways, a retaining spring is connected to one side of the raceway, a static magnetic ring is arranged on one side of the steering knuckle, a dust cover is connected to one side of the static magnetic ring, and a sealing ring is arranged at the connection between the dust cover and the static magnetic ring.

[0007] Furthermore, the dust cover is a circular structure, and its surface is a serrated shape formed by a plurality of groups of 30-60 degree edges and corners evenly arranged along the outer surface of the dust cover, and a dynamic magnetic ring is arranged at the bottom of the dust cover.

[0008] Furthermore, the outer surface of the dust cover is provided with ventilation holes, and the interior of the dust cover is connected with a filter screen.

[0009] Furthermore, the vent holes are provided in a plurality of groups, and the vent holes are all located at the bottom of the corners of the outer surface of the dust cover and are evenly arranged along the outer surface of the dust cover.

[0010] Furthermore, a fixing bracket is connected to one side of the static magnetic ring, the fixing bracket is a cylindrical structure, and an opening direction of the fixing bracket corresponds to the dust cover.

[0011] Furthermore, a metal foil is provided on the outer surface of the wheel hub bearing, the metal foil is in a circular ring shape, and the metal foil is arranged around the contact surface between the fixing bracket and the wheel hub bearing.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the long-life wheel hub bearing unit with an external dust cover adopts a magnetic fixing method to fix the dust cover, and a sealing ring is arranged at the connection to improve the running stability and safety of the wheel hub unit. The serrated surface and vent design of the dust cover can maintain the internal air pressure balance, and can also effectively block the intrusion of dust and pollutants, thereby extending the service life. The specific contents are as follows:

[0013] The static ring is made of permanent magnetic material, and the dust cover is fixed in the hub unit, which not only provides a stable magnetic connection, but also improves the operation safety and stability of the hub unit through its good sealing performance. The outer surface of the dust cover is set as a serrated structure arranged at an angle of 30-60 degrees. This design reduces the deposition and mounting of sediment on the dust cover by increasing the roughness and aerodynamic characteristics of the dust cover surface. The serrated surface structure makes it difficult for sediment to find a flat surface to stay stably, thereby reducing the contact area between the sediment and the dust cover. It can effectively divide the airflow, reduce air resistance, and optimize the airflow on the dust cover surface. At the same time, vents are arranged on the serrated surface, and a filter is arranged under the vents. This design can not only maintain the internal air pressure balance, but also effectively block the invasion of dust and pollutants through the synergistic effect of the filter and the vents. The static magnetic ring is arranged in a fixed bracket and connected to the hub unit. At the same time, a metal foil is arranged between the fixed bracket and the hub unit. Through such a design, the magnetic field of the static magnetic ring at work can reduce the impact of the operation of the electronic components of the hub unit, and at the same time, the magnetic field strength can be more accurately controlled, so that the connection of the dust cover is more firmly prevented to prevent the invasion of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of a long-life hub bearing unit with an external dust cover according to the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of a static magnetic ring of a long-life hub bearing unit with an external dust cover according to the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the three-dimensional structure of a dust cover of a long-life hub bearing unit with an external dust cover.

[0017] In the figure: 1. flange; 2. steering knuckle; 3. wheel bolt; 4. locking nut; 5. drive shaft; 6. wheel hub bearing; 7. raceway; 8. roller; 9. retaining ring; 10. static magnetic ring; 11. dust cover; 12. sealing ring; 13. vent; 14. filter; 15. dynamic magnetic ring; 16. fixing bracket; 17. metal foil. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 - Figure 3 The utility model provides a technical solution: a long-life wheel hub bearing unit with an external dust cover, comprising a flange 1, a steering knuckle 2 and a drive shaft 5. The flange 1 is made of metal material and plays a role of connection and fixing. The steering knuckle 2 is connected to one side of the flange 1, and the wheel hub unit can be rotated through the steering knuckle 2. Wheel bolts 3 are arranged at both ends of the flange 1. The wheel bolts 3 are made of cemented carbide and play a role in stabilizing the connection between the wheel hub unit and other components. A locking nut 4 is arranged at the center of the flange 1, and a drive shaft 5 is arranged on one side of the locking nut 4. A wheel hub bearing 6 is arranged on one side of the drive shaft 5. These parts provide power to the wheel hub unit through linkage. The outer surface of the wheel hub bearing 6 is provided with a metal foil 17, and the metal foil 17 is a nickel-cobalt eutectic alloy. It can effectively absorb and reflect the magnetic field, thereby reducing the interference of the static magnetic ring 10 on the electronic components, so that the electronic components are not affected in the magnetic field. The metal foil 17 is annular, and the metal foil 17 is arranged around the contact surface between the fixed bracket 16 and the wheel hub bearing 6. Raceways 7 are arranged on both sides of the steering knuckle 2. The raceways 7 are made of stainless steel. The raceways 7, as the part in contact with the rollers 8, must have extremely high hardness and wear resistance to withstand the high stress and friction when the vehicle is running. Rollers 8 are arranged inside the raceways 7. The rollers 8 are made of bearing steel, have fatigue resistance and high hardness. There are two groups of rollers 8, and the two groups of rollers 8 are evenly arranged along the horizontal direction of the raceways 7. A retaining spring 9 is connected to one side of the raceway 7. The retaining spring 9 stabilizes the structure and provides shock absorption.

[0020] A static magnetic ring 10 is arranged on one side of the steering knuckle 2. The static magnetic ring 10 is made of neodymium iron boron (NdFeB) permanent magnetic material. This material has a high magnetic energy product and can still maintain good magnetic properties in a high temperature environment. At the same time, its price is relatively reasonable, which makes it have significant advantages in cost-effectiveness. A fixed bracket 16 is connected to one side of the static magnetic ring 10. The fixed bracket 16 is a cylindrical structure made of antimagnetic material, which can ensure the stability of the entire system during operation and reduce the magnetic influence on the electronic components of the hub unit. The fixed bracket 16 is The opening direction corresponds to the dust cover 12. The dust cover 12 is connected to one side of the static magnetic ring 10. The dust cover 11 is a disc-shaped structure made of metal material. Its surface is a serrated surface formed by a plurality of groups of 30-60 degree edges and corners evenly arranged along the outer surface of the dust cover 12. The serrated surface structure makes it difficult for the sediment to find a flat surface to stay stably, thereby reducing the contact area between the sediment and the dust cover. At the same time, it can effectively divide the airflow, reduce air resistance, and optimize the separation point of the airflow on the surface of the dust cover 11, reducing the generation of eddy currents.

[0021] A moving magnetic ring 15 is provided at the bottom of the dust cover 11. The moving magnetic ring 15 is connected to the dust cover 11 and fixed on the wheel hub unit by magnetic force to prevent dust from entering the inside of the wheel hub unit from the surface to damage the electronic components. A sealing ring 12 is provided at the connection between the dust cover 11 and the static magnetic ring 10. The sealing ring 12 is a 3.0 mm thick annular gasket made of rubber material, which seals the connection gap while fixing the magnetic connection, thereby strengthening the sealing of the dust cover 11 and the wheel hub unit. A vent 13 is provided on the outer surface of the dust cover 11. A filter screen 14 is connected to the inside of the dust cover 12. The vent 13 is provided on the outer surface of the dust cover 11. A filter screen 14 is connected to the inside of the dust cover 12. There are several groups of vents 13, and all of them are located at the bottom of the corners of the outer surface of the dust cover 12, and are evenly arranged along the outer surface of the dust cover 12. The filter 14 is a mesh structure made of metal material. This design can not only maintain the internal air pressure balance through the synergistic effect of the filter 14 and the vents 13, but also effectively block the invasion of dust and pollutants. The filter 14 can effectively block most of the dust and impurities and prevent them from entering the hub unit through the vents 13. The vents 13 help to adjust the internal and external air pressure, avoid deformation or damage of the dust cover caused by the air pressure difference, and effectively extend the service life of the device.

[0022] Working principle: When using a long-life wheel hub bearing unit with an external dust cover, the static magnetic ring 10 placed in the fixed bracket 16 is connected to the wheel hub unit, and a layer of metal foil 17 is added at the connection. The fixed bracket 16 and the metal foil 17 work together to prevent the static magnetic ring 10 from generating magnetic influence on the electronic components of the wheel hub unit during operation, thereby affecting the use. Then the dust cover 11 is taken out, and the dynamic magnetic ring 15 at the bottom is connected to the static magnetic ring 10 accordingly. A sealing ring 12 is provided between the dynamic magnetic ring 15 and the static magnetic ring 10. The filling of the sealing ring 12 can make the connection surface between the dust cover 11 and the wheel hub unit completely sealed, preventing dust from entering and affecting the service life of the wheel hub.

[0023] The surface of the dust cover 11 is serrated, and there are several groups of evenly arranged vents 13. A filter screen 14 is provided at the bottom of the vent 13. The serrated surface structure makes it difficult for the mud and sand to find a flat surface to stay stably, thereby reducing the contact area between the mud and sand and the dust cover 11. The setting of the vent 13 can effectively divide the airflow, reduce air resistance, optimize the separation point of the airflow on the surface of the dust cover 11, and reduce the generation of vortices. At the same time, the vent 13 can maintain the balance of air pressure inside and outside the cover to prevent structural deformation due to excessively high or low internal pressure. Or damaged, the vent 13 also helps to regulate the temperature and reduce condensation, ensuring a good working environment for the internal components. The filter 14 can effectively block most of the dust and impurities and prevent them from entering the hub unit through the vent 13. The combination of the filter 14 and the vent 13 provides double protection, which can not only prevent dust from entering, but also maintain the stability of air pressure and temperature, and at the same time optimize the heat dissipation performance of the hub unit. Through the effective cooperation of the vent 13 and the filter 14, the internal heat can be discharged in time, effectively extending the service life of the device.

Claims

1. A long-life wheel hub bearing unit with an external dust cover, comprising a flange (1), a steering knuckle (2) and a drive shaft (5), characterized in that: A steering knuckle (2) is connected to one side of the flange (1), wheel bolts (3) are arranged at both ends of the flange (1), a locking nut (4) is arranged at the center of the flange (1), a drive shaft (5) is arranged on one side of the locking nut (4), a wheel hub bearing (6) is arranged on one side of the drive shaft (5), raceways (7) are arranged on both sides of the steering knuckle (2), rollers (8) are arranged inside the raceways (7), two groups of rollers (8) are arranged, and the two groups of rollers (8) are evenly arranged along the horizontal direction of the raceways (7), a retaining spring (9) is connected to one side of the raceway (7), a static magnetic ring (10) is arranged on one side of the steering knuckle (2), a dust cover (11) is connected to one side of the static magnetic ring (10), and a sealing ring (12) is arranged at the connection between the dust cover (11) and the static magnetic ring (10).

2. A long-life hub bearing unit with an external dust cover according to claim 1, characterized in that: The dust cover (11) is a circular structure, and its surface is a sawtooth shape formed by a plurality of groups of 30-60 degree edges and corners evenly arranged along the outer surface of the dust cover (11). A moving magnetic ring (15) is provided at the bottom of the dust cover (11).

3. The long-life hub bearing unit with an external dust cover according to claim 1, characterized in that: The outer surface of the dust cover (11) is provided with a vent hole (13), and the interior of the dust cover (11) is connected to a filter screen (14).

4. A long-life hub bearing unit with an external dust cover according to claim 3, characterized in that: The vent holes (13) are provided in a plurality of groups, and the vent holes (13) are all located at the bottom of the corners of the outer surface of the dust cover (11) and are evenly arranged along the outer surface of the dust cover (11).

5. The long-life hub bearing unit with an external dust cover according to claim 1, characterized in that: A fixing bracket (16) is connected to one side of the static magnetic ring (10); the fixing bracket (16) is a cylindrical structure, and the opening direction of the fixing bracket (16) corresponds to the dust cover (11).

6. A long-life hub bearing unit with an external dust cover according to claim 5, characterized in that: The outer surface of the wheel hub bearing (6) is provided with a metal foil (17), the metal foil (17) is annular, and the metal foil (17) is arranged around the contact surface between the fixing bracket (16) and the wheel hub bearing (6).

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