Hub bearing unit subjected to oxidation treatment

Abstract

The utility model relates to the technical field of automobile parts, in particular to an oxidized hub bearing unit which comprises an outer flange and an inner flange, a half inner ring is arranged at the right end of the inner flange, arc-shaped raceways are arranged on the left side and the right side of an inner hole of the outer flange, and raceways are arranged on the half inner ring and the inner flange. Rolling pieces are arranged between the arc-shaped raceways and the raceways, a plurality of high-lip sealing rings are arranged between the outer flange and the inner flange, a plurality of conventional sealing rings and a plurality of magnetic rings are arranged between the outer flange and the half inner ring, expanding grooves are formed in the sides, close to the rolling pieces, of the conventional sealing rings, and expanding rings are arranged in the expanding grooves; a concave groove is formed between the conventional sealing ring and the inner wall of the outer flange; the expanding groove is formed in the side, close to the rolling piece, of the conventional sealing ring, the expanding ring is arranged in the expanding groove, the magnetic ring attracts the expanding ring, the conventional sealing ring extrudes the inner flange and the outer flange at the same time and is tightly attached to the side walls of the inner flange and the outer flange, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to an oxidized wheel hub bearing unit. Background Art

[0002] At present, the inner and outer flanges of this type of wheel hub bearing units are manufactured by forging process; after forging, the billets are shot blasted; after most products are machined, the processed parts retain the original color of the material, and the non-processed parts retain the original shot blasting state; there are also some products that are electrophoretically treated, and their base outer diameters, riveting positions, and raceway parts are not convenient for electrophoresis protection, and their raceways need to be ground and super-processed after electrophoresis; therefore, rust inhibitors are used for rust prevention during the processing and on-site turnover areas, and atomized rust-proof oil is used for rust prevention after assembly of the finished products; and this type of rust prevention process has a short rust prevention time under the natural environment of normal vehicle installation and use of the product, and it is easy for the exposed parts of the product to rust and extend to other surfaces of the product, making it inconvenient to disassemble the product and causing premature damage due to rust.

[0003] The sealing ring in the existing wheel hub and the joints between the inner and outer flanges are prone to wear, resulting in poor sealing effect, which can easily lead to problems such as tire leakage and steering wheel shaking. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the existing technology. By opening an expansion groove on the side of a conventional sealing ring close to a rolling element, an expansion ring is arranged in the expansion groove, and the expansion ring is attracted by a magnetic ring, the conventional sealing ring is squeezed toward the inner and outer flanges at the same time and fits tightly to the side walls of the inner and outer flanges, thereby improving the sealing effect. It solves the problems of the sealing ring in the existing wheel hub being prone to wear at the joints between the inner and outer flanges, resulting in poor sealing effect, which can easily lead to tire leakage, steering wheel shaking, and other problems.

[0005] In view of the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] A wheel hub bearing unit treated with oxidation treatment comprises an outer flange and an inner flange, a half inner ring is provided at the right end portion of the inner flange, arc-shaped raceways are provided on the left and right sides of the inner hole of the outer flange, raceways corresponding to the arc-shaped raceways are provided on the half inner ring and the inner flange, an equal number of rolling elements are provided between the arc-shaped raceways and the raceways, a plurality of high lip sealing rings are provided between the outer flange and the inner flange, a plurality of conventional sealing rings and a plurality of magnetic rings are provided between the outer flange and the half inner ring, an expansion groove is provided on the side of the conventional sealing ring close to the rolling element, an expansion ring is provided in the expansion groove for the conventional sealing ring to be close to the side walls of the inner and outer flanges, and a concave groove is provided between the conventional sealing ring and the inner wall of the outer flange.

[0007] As a preference, the side wall of the expansion groove is configured as a slope with an inclination angle of 60 degrees.

[0008] As a preferred embodiment, the inner hole portion of the inner flange axis is provided with an involute internal spline that passes through and evenly divides a plurality of teeth.

[0009] As a preferred embodiment, the inner and outer surfaces of the outer flange and the inner flange, the arc-shaped raceway and the raceway are all protected by high-temperature oxidation blackening.

[0010] As a preference, the high lip sealing ring is arranged between the left inner hole of the outer flange and the sealing arc of the inner flange.

[0011] As a preference, the conventional sealing ring and the magnetic ring are combined with each other and are jointly arranged between the inner hole on the right side of the outer flange and the outer diameter of the large end of the semi-inner ring.

[0012] As a preference, a plurality of nylon cages are provided between the arc-shaped raceways and the raceways, and the rolling elements are evenly distributed in the ball pockets of the nylon cages.

[0013] As a preference, a plurality of hub bolts are provided on the inner flange, and a plurality of mounting threaded holes are opened on the outer flange.

[0014] As another preferred embodiment, the semi-inner ring is installed at the journal position at the right end of the inner flange by interference fit, and the semi-inner ring and the inner flange are locked together by riveting.

[0015] Beneficial effects of the utility model:

[0016] 1. In the utility model, an expansion groove is provided on the side of a conventional sealing ring close to the rolling element, an expansion ring is arranged in the expansion groove, and the expansion ring is attracted by a magnetic ring, so that the conventional sealing ring is squeezed toward the inner and outer flanges at the same time and fits tightly to the inner and outer flange side walls, thereby improving its sealing effect.

[0017] In summary, the device has the advantage of improving the performance and safety of battery modules and is particularly suitable for the field of energy storage equipment technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of 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 creative work.

[0019] Figure 1 A schematic diagram of the structure of a hub bearing unit treated with oxidation;

[0020] Figure 2 A cross-sectional schematic diagram of an oxidized wheel hub bearing unit;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle

[0022] Figure 4 This is the working status diagram of the expansion ring.

[0023] 1. Outer flange; 2. Half inner ring; 3. Inner flange; 4. Rolling element; 5. Nylon cage; 6. High lip seal; 7. Hub bolt; 8. Conventional seal; 9. Magnetic ring; 10. Involute internal spline; 11. Mounting threaded hole; 12. Concave groove; 20. Support ring; 81. Support groove. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present utility model are clearly and completely described below with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figures 1 to 3 As shown, an oxidized wheel hub bearing unit includes an outer flange 1 and an inner flange 3, a half inner ring 2 is provided at the right end of the inner flange 3, arc-shaped raceways are provided on both sides of the inner hole of the outer flange 1, raceways corresponding to the arc-shaped raceways are provided on the half inner ring 2 and the inner flange 3, and an equal number of rolling elements 4 are provided between the arc-shaped raceways and the raceways, a plurality of high-lip sealing rings 6 are provided between the outer flange 1 and the inner flange 3, a plurality of conventional sealing rings 8 and a plurality of magnetic rings 9 are provided between the outer flange 1 and the half inner ring 2, an expansion groove 81 is provided on the side of the conventional sealing ring 8 close to the rolling element 4, an expansion ring 20 is provided in the expansion groove 81 for the conventional sealing ring 8 to adhere to the side walls of the inner and outer flanges 1, and a concave groove 12 is provided between the conventional sealing ring 8 and the inner wall of the outer flange 1.

[0027] It is worth mentioning here that by opening an expansion groove 81 on the side of the conventional sealing ring 8 close to the rolling element 4, an expansion ring 20 is arranged in the expansion groove 81, and the expansion ring 20 is attracted by the magnetic ring 9, the conventional sealing ring 8 is squeezed toward the inner and outer flanges at the same time and tightly fits against the inner and outer flange side walls, thereby improving its sealing effect; the expansion ring 20 is made of iron material.

[0028] like Figure 3 As shown, the side wall of the expansion groove 81 is configured to be an inclined surface with an inclination angle of 60 degrees.

[0029] In this example, the expansion ring 20 moves into the conventional sealing ring 8 under the attraction of the magnetic ring 9, and the inclined surface is squeezed so that the conventional sealing ring 8 fits tightly against the inner and outer flange side walls.

[0030] like Figure 1 As shown, the inner hole portion of the inner flange 3 is provided with an involute internal spline 10 that penetrates and evenly divides a number of teeth.

[0031] In this example, the inner axial hole of the inner flange 3 is provided with a through, evenly spaced, 30-34-tooth involute internal spline.

[0032] The inner and outer surfaces of the outer flange 1 and the inner flange 3, the arc-shaped raceway and the raceway are all protected by high-temperature oxidation blackening.

[0033] In this example, the outer flange and inner flange of the hub bearing unit are subjected to a high-temperature oxidation blackening process, and the oxidation blackening temperature is set in the range of 130-160°C, so that a dense oxide film is generated on all the inner and outer surfaces to ensure the bonding strength and thickness of the oxide film layer; and the heating during the oxidation process helps to reduce the internal stress of the workpiece and ensure that the hardness of the induction quenching area of the hub bearing unit still meets the standard requirement of HRC59-64; the outer surfaces and raceway parts of the outer flange 1 and the inner flange 3 can be directly assembled after oxidation treatment; at the same time, it can effectively reduce the use of rust inhibitors in the manufacturing process, which has a positive effect on the organization's environmental protection; and effectively enhance the product's corrosion resistance and improve its anti-skid performance. In the natural environment after installation, it can effectively improve the product's rust resistance, ensure that within the service life of the product, reduce premature damage caused by rust, thereby improving the safety performance of the product's installation and use; and in the later maintenance process, avoid disassembly and assembly difficulties or damage to related components due to rust between the docking parts.

[0034] like Figure 2 As shown, the high lip sealing ring 6 is arranged between the left inner hole of the outer flange 1 and the sealing arc of the inner flange 3.

[0035] like Figure 2 As shown, the conventional sealing ring 8 and the magnetic ring 9 are combined with each other and are jointly arranged between the right inner hole of the outer flange 1 and the outer diameter of the large end of the semi-inner ring 2.

[0036] like Figure 2 As shown, a plurality of nylon retainers 5 are provided between the arc-shaped raceways, and the rolling elements 4 are evenly distributed in the ball pockets of the nylon retainers 5 .

[0037] In this example, the rolling element 4 steel balls are evenly distributed in the ball pocket, and each raceway is provided with 16-18 rolling element 4 steel balls with a diameter of 11.1125.

[0038] like Figure 1 、 Figure 2 As shown, a plurality of hub bolts 7 are provided on the inner flange 3 , and a plurality of mounting threaded holes 11 are provided on the outer flange 1 .

[0039] In this example, the inner flange 3 is provided with 4-6 M12*1.5 high-strength hub bolts 7, and the outer flange is provided with 3-5 M10*1.5 mounting threaded holes 11.

[0040] like Figure 2 As shown, the half inner ring 2 is installed at the journal position at the right end of the inner flange 3 through interference fit, and the half inner ring 2 and the inner flange 3 are locked together by riveting.

[0041] In this example, the semi-inner ring 2 is installed at the shaft neck position at the right end of the inner flange 3 by interference fit, and is locked together by riveting, effectively implementing integration; the rolled edge after riveting follows the inner arc of the semi-inner ring 2 until it is close to its end face.

[0042] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art based on the technical teachings of the present invention are within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A hub bearing unit subjected to oxidation treatment, comprising an outer flange (1) and an inner flange (3), wherein a half inner ring (2) is provided at the right end portion of the inner flange (3), arc-shaped raceways are provided on both the left and right sides of the inner hole of the outer flange (1), raceways corresponding to the arc-shaped raceways are provided on the half inner ring (2) and the inner flange (3), an equal number of rolling elements (4) are provided between the arc-shaped raceways and the raceways, and a plurality of high-lip sealing rings (6) are provided between the outer flange (1) and the inner flange (3), characterized in that: A plurality of conventional sealing rings (8) and a plurality of magnetic rings (9) are arranged between the outer flange (1) and the semi-inner ring (2); an expansion groove (81) is provided on the side of the conventional sealing ring (8) close to the rolling element (4); an expansion ring (20) is provided in the expansion groove (81) for the conventional sealing ring (8) to be closely attached to the side wall of the outer flange (1); and a concave groove (12) is provided between the conventional sealing ring (8) and the inner walls of the inner and outer flanges.

2. The oxidized wheel hub bearing unit according to claim 1, characterized in that: The side wall of the expansion groove (81) is configured as an inclined surface with an inclination angle of 60 degrees.

3. The oxidized wheel hub bearing unit according to claim 1, characterized in that: The inner hole portion of the inner flange (3) is provided with an involute internal spline (10) that penetrates and evenly divides a plurality of teeth.

4. The oxidized wheel hub bearing unit according to claim 1, characterized in that: The inner and outer surfaces, the arc-shaped raceway and the raceway of the outer flange (1) and the inner flange (3) are all protected by high-temperature oxidation blackening.

5. The oxidized wheel hub bearing unit according to claim 1, characterized in that: The high lip sealing ring (6) is arranged between the left inner hole of the outer flange (1) and the sealing arc of the inner flange (3).

6. The oxidized wheel hub bearing unit according to claim 1, characterized in that: The conventional sealing ring (8) and the magnetic ring (9) are combined with each other and are arranged together between the inner hole on the right side of the outer flange (1) and the outer diameter of the large end of the semi-inner ring (2).

7. The oxidized wheel hub bearing unit according to claim 1, characterized in that: A plurality of nylon retainers (5) are provided between the arc-shaped raceways, and the rolling elements (4) are evenly distributed in the ball pockets of the nylon retainers (5).

8. The oxidized wheel hub bearing unit according to claim 1, characterized in that: The inner flange (3) is provided with a plurality of hub bolts (7), and the outer flange (1) is provided with a plurality of mounting threaded holes (11).

9. The oxidized wheel hub bearing unit according to claim 1, characterized in that: The semi-inner ring (2) is installed at the right end journal position of the inner flange (3) through interference fit, and the semi-inner ring (2) and the inner flange (3) are locked together by riveting.

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