Lightweight hub bearing unit assembly

Abstract

This utility model relates to the field of vehicle wheel hub bearings and discloses a lightweight wheel hub bearing unit assembly, including an outer ring sleeve (1) and an inner ring shaft (2). The lower end of the shaft (2) is integrally formed with a flange (3). Rollers are arranged between the outer ring of the shaft (2) and the inner ring of the sleeve (1) to form a bearing structure. A cover (4) is provided at the upper end of the sleeve (1), and the sleeve (1) extends to the root (5) of the shaft (2). The rollers include two sets, one set at the upper end of the shaft (2) and the other set at the root (5) of the shaft (2). The flange (3) has multiple fixing wings (6), and fixing holes (7) are provided on the fixing wings (6). The fixing wings (6) are distributed circumferentially along the shaft (2), and a weight reduction opening (8) is formed between the fixing wings (6). This bearing unit assembly has the advantages of reliable sealing, high load-bearing capacity, and long service life.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub bearings, and mainly to lightweight wheel hub bearing unit assemblies. Background Technology

[0002] Chinese patent CN201056137Y discloses a wheel hub bearing assembly for passenger cars. This wheel hub assembly is a conventional wheel hub assembly, which has the following disadvantages: firstly, poor sealing and short lifespan; secondly, the entire flange is heavy, costly, and has a low degree of integration. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a lightweight wheel hub bearing unit assembly.

[0004] The lightweight wheel hub bearing unit assembly includes an outer ring sleeve and an inner ring shaft. The lower end of the shaft is integrally formed with a flange. Rollers are arranged between the outer ring of the shaft and the inner ring of the sleeve to form a bearing structure. A cover is provided at the upper end of the sleeve, which extends to the root of the shaft. The rollers include two sets, one set at the upper end of the shaft and the other set at the root of the shaft. The flange has multiple fixing wings with fixing holes. The fixing wings are distributed circumferentially along the shaft, and weight reduction openings are formed between the fixing wings.

[0005] Preferably, the root of the shaft is provided with an arc opening, and the roller assembly located below is supported in the arc opening. The lower side of the arc opening forms a step with the flange. A lower seal is provided between the side of the step and the inner ring surface of the sleeve. The inner ring of the lower seal is in sealing contact with the side of the step, the outer ring of the lower seal is in sealing contact with the inner ring surface of the sleeve, and the lower end of the lower seal abuts against the flange.

[0006] Preferably, the edge of the step is provided with a limiting edge, and the lower seal is supported on the lower side of the limiting edge; the lower side of the lower seal is provided with two sealing lips, namely an inner sealing lip and an outer sealing lip, the inner sealing lip abuts against the side of the step, and the outer sealing lip abuts against the step surface of the flange; the angle between the outer sealing lip and the end face of the flange is an acute angle.

[0007] Preferably, the length of the inner sealing lip is shorter than the length of the outer sealing lip.

[0008] Preferably, the upper ring edge of the lower seal is provided with a support lip extending outward, and the lower seal is provided with a connecting lip on the lower side of the support lip. The inner sealing lip and the outer sealing lip are connected to the lower side of the connecting lip. The outer ring of the connecting lip extends with an L-shaped retaining ring, which is axially positioned and seals against the inner wall of the lower edge of the sleeve.

[0009] Preferably, a reinforcing rib is provided at the location of the fixing hole, and the reinforcing rib extends to the root of the shaft.

[0010] Preferably, the upper outer ring surface of the shaft is provided with an assembly groove, an assembly ring is provided in the assembly groove, a first limiting arc groove with the opening facing downward is provided on the assembly ring, a second limiting arc groove is provided at the corresponding position on the inner wall of the sleeve, the opening of the second limiting arc groove faces upward, and the first limiting arc groove and the second limiting arc groove form a rolling groove for limiting the roller.

[0011] Preferably, the upper end of the shaft is provided with a slot one, and the lower end is provided with a slot two. A sensor is provided in slot one. The upper ends of the cover and the sleeve are sealed together. The cover is provided with a wire harness hole for wire harness lead-out.

[0012] Preferably, the sleeve and shaft are made of aluminum alloy or high-strength steel; lubricating material is filled between the cover and the lower seal.

[0013] Compared with existing technologies, this solution offers the following advantages: First, it employs an integrated design, incorporating wheel hub bearings, ABS sensors, sealing rings, and flanges, reducing the number of components and lowering the risk of failure. Second, it enhances durability: using high-strength steel or lightweight aluminum alloy optimizes load distribution and extends service life. Finally, it improves sealing and lubrication: the multi-lip seal design, combined with long-lasting grease, effectively prevents dust and water damage, adapting to harsh environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the device;

[0015] Figure 2 yes Figure 1 Top view;

[0016] Figure 3 yes Figure 2 A sectional view;

[0017] Figure 4 This is a cross-sectional view of the lower seal.

[0018] The technical names of the reference numerals in the figure are as follows: 1—sleeve body, 2—shaft, 3—flange, 4—cover, 5—root, 6—fixed wing, 7—fixed hole, 8—weight reduction port, 9—arc port, 10—step, 11—side, 12—lower seal, 13—limiting edge, 14—inner sealing lip, 15—outer sealing lip, 16—supporting lip, 17—connecting lip, 18—retaining ring, 19—reinforcing rib, 20—assembly groove, 21—assembly ring, 22—first limiting arc groove, 23—second limiting arc groove, 24—mounting part, 25—mounting hole. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] Example 1

[0021] The lightweight wheel hub bearing unit assembly includes an outer ring sleeve 1 and an inner ring shaft 2. The sleeve 1 has an arc-shaped cross-section, and the shaft 2 is a circular shaft. A flange 3 is integrally formed at the lower end of the shaft 2. Rollers are arranged between the outer ring of the shaft 2 and the inner ring of the sleeve 1 to form a bearing structure. Specifically, in this design, the rollers are ball bearings, and grooves are provided on the shaft 2 and the sleeve 1 to form raceways for the rollers. The rollers are restrained by a cage.

[0022] Specifically, in this design, a cover 4 is provided at the upper end of the sleeve 1. The upper cover 4 corresponds to the lower sealing element, thereby forming a sealed space between the sleeve 1 and the shaft 2, which is used to fill grease. The sleeve 1 extends to the root 5 of the shaft 2. The rollers include two sets, one set at the upper end of the shaft 2 and the other set at the root 5 of the shaft 2. The flange 3 has multiple fixing wings 6, and fixing holes 7 are provided on the fixing wings 6. The fixing wings 6 are distributed circumferentially along the shaft 2, and weight-reducing openings 8 are formed between the fixing wings 6. The upper rollers are defined as upper rollers, and the lower rollers are defined as lower rollers. The arrangement of the two sets of rollers greatly improves the bearing capacity of the hub bearing unit and extends its service life. The structure at both ends ensures a more balanced stress distribution.

[0023] The shaft 2 and flange 3 are integrally formed. Flange 3 is not a complete disc; it can be defined as a complete disc with the portion around the fixing hole 7 removed to form a starfish structure. The root 5 of the shaft 2 is provided with an arc vent 9, and the roller assembly located below is supported within the arc vent 9. The lower side of the arc vent 9 forms a step 10 with the flange 3. A lower seal 12 is provided between the side 11 of the step 10 and the inner annular surface of the sleeve 1. The inner ring of the lower seal 12 is in sealing contact with the side 11 of the step 10, and the outer ring of the lower seal 12 is in sealing contact with the inner annular surface of the sleeve 1. The lower end of the lower seal 12 abuts against the flange 3.

[0024] In this embodiment, to prevent the lower seal 12 from moving upwards during installation, a limiting edge 13 is provided at the edge of the step 10, and the lower seal 12 is supported on the lower side of the limiting edge 13. Two sealing lips are provided on the lower side of the lower seal 12: an inner sealing lip 14 and an outer sealing lip 15. The inner sealing lip 14 abuts against the side surface 11 of the step 10, and the outer sealing lip 15 abuts against the surface of the step 10 of the flange 3. The angle between the outer sealing lip 15 and the end face of the flange 3 is acute. The length of the inner sealing lip 14 is less than the length of the outer sealing lip 15. Due to its inclined design, the outer sealing lip 15 has a larger contact area with the flange 3 during sealing, ensuring a good sealing effect.

[0025] The lower seal 12 has an outwardly extending support lip 16 on the upper edge of the lower ring. The lower seal 12 has a connecting lip 17 on the lower side of the support lip 16. The inner sealing lip 14 and the outer sealing lip 15 are connected to the lower side of the connecting lip 17. The outer ring of the connecting lip 17 extends with an L-shaped retaining ring 18. The retaining ring 18 is axially arranged and seals against the inner wall of the lower edge of the sleeve 1.

[0026] In this design, since there is a weight-reducing opening 8 between the fixed wings 6, a reinforcing rib 19 is provided at the location of the fixing hole 7, and the reinforcing rib 19 extends to the root 5 of the shaft 2. The root 5 of the fixed wing 6 is connected by an arc-shaped connecting part, and the arc-shaped connecting part, the fixed wing 6, the reinforcing rib, and the shaft 2 are all integrally formed structures.

[0027] The upper outer ring surface of the shaft 2 is provided with an assembly groove 20, and an assembly ring 21 is provided in the assembly groove 20. The assembly ring 21 is provided with a first limiting arc groove 22 with the opening facing downward. A second limiting arc groove 23 is provided at a corresponding position on the inner wall of the sleeve 1. The opening of the second limiting arc groove 23 faces upward. The first limiting arc groove 22 and the second limiting arc groove 23 form a groove for limiting the roller.

[0028] The upper end of the shaft 2 is provided with a slot 1, and the lower end is provided with a slot 2. A sensor is provided in the slot 1. The cover 4 is sealed to the upper end of the sleeve 1. The cover 4 is provided with a wire harness hole 26 for wire harness lead-out.

[0029] Compared with existing technologies, this solution offers the following advantages: Firstly, it employs an integrated design, incorporating the wheel hub bearing, ABS sensor, sealing ring, and flange, reducing the number of components and lowering the risk of failure. Secondly, it enhances durability by using high-strength steel or lightweight aluminum alloy, optimizing load distribution, and extending service life. Finally, it improves sealing and lubrication through a multi-lip seal design combined with long-lasting grease, effectively preventing dust and water damage and adapting to harsh environments.

[0030] Example 2

[0031] Based on Example 1, the sleeve 1 and shaft 2 are made of aluminum alloy or high-strength steel; a lubricating material is filled between the cover 4 and the lower seal 12; the sleeve 1 extends to the outside of a mounting part 24, and a mounting hole 25 is provided on the mounting part 24.

[0032] Example 3

[0033] Based on Example 1, the sensor is further specified as a wheel speed sensor, an ABS sensor, or an ESP sensor.

Claims

1. A lightweight wheel hub bearing unit assembly, characterized in that: The bearing includes an outer ring sleeve (1) and an inner ring shaft (2). The lower end of the shaft (2) is integrally formed with a flange (3). Rollers are arranged between the outer ring of the shaft (2) and the inner ring of the sleeve (1) to form a bearing structure. A cover (4) is provided at the upper end of the sleeve (1). The sleeve (1) extends to the root (5) of the shaft (2). The rollers include two sets, one set at the upper end of the shaft (2) and the other set at the root (5) of the shaft (2). The flange (3) has multiple fixing wings (6). Fixing holes (7) are provided on the fixing wings (6). The fixing wings (6) are distributed circumferentially along the shaft (2). Weight reduction openings (8) are formed between the fixing wings (6).

2. The lightweight wheel hub bearing unit assembly according to claim 1, characterized in that: The root (5) of the shaft (2) is provided with an arc mouth (9), and the roller group located below is supported in the arc mouth (9). The lower side of the arc mouth (9) forms a step (10) with the flange (3). A lower seal (12) is provided between the side (11) of the step (10) and the inner ring surface of the sleeve (1). The inner ring of the lower seal (12) is in sealing contact with the side (11) of the step (10), and the outer ring of the lower seal (12) is in sealing contact with the inner ring surface of the sleeve (1). The lower end of the lower seal (12) abuts against the flange (3).

3. The lightweight wheel hub bearing unit assembly according to claim 1, characterized in that: The edge of the step (10) is provided with a limiting edge (13), and the lower seal (12) is supported on the lower side of the limiting edge (13). The lower side of the lower seal (12) is provided with two sealing lips, namely an inner sealing lip (14) and an outer sealing lip (15). The inner sealing lip (14) abuts against the side (11) of the step (10), and the outer sealing lip (15) abuts against the step (10) surface of the flange (3). The angle between the outer sealing lip (15) and the end face of the flange (3) is an acute angle.

4. The lightweight wheel hub bearing unit assembly according to claim 3, characterized in that: The length of the inner sealing lip (14) is less than the length of the outer sealing lip (15).

5. The lightweight wheel hub bearing unit assembly according to claim 3, characterized in that: The upper ring edge of the lower seal (12) is provided with a support lip (16) extending outward. The lower seal (12) is provided with a connecting lip (17) on the lower side of the support lip (16). The inner sealing lip (14) and the outer sealing lip (15) are connected to the lower side of the connecting lip (17). The outer ring of the connecting lip (17) extends with an L-shaped retaining ring (18). The retaining ring (18) is axially arranged and seals with the inner wall of the lower edge of the sleeve (1).

6. The lightweight wheel hub bearing unit assembly according to claim 1, characterized in that: A reinforcing rib (19) is provided at the location of the fixing hole (7), and the reinforcing rib (19) extends to the root (5) of the shaft (2).

7. The lightweight wheel hub bearing unit assembly according to claim 1, characterized in that: The upper outer ring surface of the shaft (2) is provided with an assembly groove (20), and an assembly ring (21) is provided inside the assembly groove (20). The assembly ring (21) is provided with a first limiting arc groove (22) with its opening facing downward. The inner wall of the sleeve (1) is provided with a second limiting arc groove (23) at the corresponding position. The opening of the second limiting arc groove (23) faces upward. The first limiting arc groove (22) and the second limiting arc groove (23) form a groove for limiting the roller.

8. The lightweight wheel hub bearing unit assembly according to claim 1, characterized in that: The upper end of the shaft (2) is provided with a slot one, and the lower end is provided with a slot two. A sensor is provided in the slot one. The upper end of the cover (4) is sealed to the upper end of the sleeve (1). The cover (4) is provided with a wire harness hole for wire harness lead-out.

9. The lightweight wheel hub bearing unit assembly according to claim 1, characterized in that: The sleeve (1) and shaft (2) are made of aluminum alloy or high-strength steel; the cover (4) and the lower seal (12) are filled with lubricating material, and the sleeve (1) has an external extension of a mounting part (24), on which a mounting hole (25) is provided.

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