Anti-corrosion automobile hub bearing

Abstract

The utility model provides an anti-corrosion automobile hub bearing, and belongs to the technical field of automobile accessories. The problems that in the using process of an existing automobile hub bearing, sealing is not tight enough, muddy water easily enters the rolling surface of a product, and the stability of the service life of the product is affected are solved. The anti-corrosion automobile hub bearing comprises an inner ring and an outer ring, the left side of the surface of the inner ring is sleeved with a first sealing lip and a second sealing lip, the surface of the outer ring is covered with the first sealing lip, the left side of the second sealing lip extends into the first sealing lip, and a third sealing lip is arranged between the inner ring and the outer ring. The third sealing lip fixedly sleeves the surface of the inner ring, the right side of the surface of the outer ring is sleeved with a sealing cover, a sealing gasket is arranged in the inner ring, a transmission shaft is inserted into the left side of the inner ring, and the sealing gasket is located on the right side of the transmission shaft. The sealing lip can be attached to the inner ring more tightly, the sealing effect is improved, muddy water can be prevented from entering the rolling surface, and the service life is long.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology and relates to a rust-resistant automotive wheel hub bearing. Background Technology

[0002] Automotive wheel hub bearings are one of the key components of a car. They are mainly installed inside the wheel hub and are used to evenly transfer the weight of the car body, passengers, and cargo to the wheel to ensure stable vehicle operation.

[0003] For example, the applicant designed an automotive wheel hub bearing and applied for a patent [Application No.: 202421133583.0; Authorization Announcement No.: CN222208657U], which includes an inner ring and an outer ring. The outer ring is movably fitted on the surface of the inner ring. A sealing cover is fitted on the right side of the outer ring surface. A positioning mechanism is fixedly connected through the top and bottom of the sealing cover. A positioning groove is opened on the right side of the top and the right side of the bottom of the outer ring surface. A sealing groove is opened on the right side of the outer ring surface. A sealing ring is fitted on the right side of the outer ring surface. A groove is opened on the inner wall of the sealing cover. An air bladder is placed in the inner cavity of the groove. An air nozzle is connected to the top of the air bladder.

[0004] The aforementioned automotive wheel hub bearings can prevent sensors from being corroded by moisture and can fix the sealing cover. However, the sealing lip does not fit tightly enough with the inner ring, resulting in poor sealing performance. Mud and water can easily enter the rolling surface of the product, affecting the stability of the product's lifespan. In addition, the lack of effective sealing measures at the joint between the drive shaft and the wheel hub bearing makes it prone to corrosion. Mud and water may also enter the bearing from the drive shaft. At the same time, the spline joint between the drive shaft and the spline of the wheel hub bearing unit may also be poorly sealed, allowing mud and water to enter and cause rust, leading to difficulties in disassembly. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a rust-resistant automotive wheel hub bearing that allows the sealing lip to fit more tightly with the inner ring, improving the sealing effect, thereby preventing mud and water from entering the rolling surface and extending its service life.

[0006] The objective of this utility model can be achieved through the following technical solution: A rust-resistant automotive wheel hub bearing includes an inner ring and an outer ring. Rollers are movably connected between the inner ring and the outer ring via a cage. A first sealing lip and a second sealing lip are respectively fitted on the left side of the inner ring surface. The first sealing lip covers the surface of the outer ring. The left side of the second sealing lip extends into the interior of the first sealing lip. A third sealing lip is provided between the inner ring and the outer ring. The third sealing lip is fixedly fitted on the surface of the inner ring. A sealing cover is fitted on the right side of the outer ring surface. A sealing gasket is provided inside the inner ring. A drive shaft is inserted into the left side of the inner ring. The sealing gasket is located on the right side of the drive shaft. An O-ring is fitted on the right side of the drive shaft surface. The outer surface of the O-ring is in close contact with the inner wall of the inner ring. A protective sleeve is fixedly fitted on the left side of the outer ring surface. A drying component is fixedly connected through the top and bottom of the protective sleeve. The drying component includes a housing, and a desiccant is placed in the inner cavity of the housing.

[0007] This rust-resistant automotive wheel hub bearing mainly features a first sealing lip, a second sealing lip, a third sealing lip, a sealing cover, a sealing gasket, a drive shaft, an O-ring, a protective sleeve, and a drying component on the surfaces of the inner and outer rings. These components allow for a tighter fit between the sealing lip and the inner ring, improving the sealing effect and providing dry protection to prevent moisture from corroding the sealing lip.

[0008] In the aforementioned rust-resistant automotive wheel hub bearing, a cover plate is bolted to the top of the housing, and feed holes are provided on both sides of the top of the housing. In practical applications, the cover plate is used to seal the housing, preventing the desiccant from spilling out, while also facilitating the replacement or addition of the desiccant, ensuring that the drying component continues to perform its drying function.

[0009] In the aforementioned rust-resistant automotive wheel hub bearing, a drying hole is provided at the bottom of the housing, the diameter of which is smaller than the diameter of the desiccant. In practical applications, by providing the drying hole, air can pass through it and come into contact with the desiccant. Moisture is absorbed by the desiccant, and the desiccant will not fall out of the drying hole, ensuring the normal operation of the drying function.

[0010] In the aforementioned rust-resistant automotive wheel hub bearing, limit grooves are formed on both sides of the top of the housing, and limit blocks are riveted to both sides of the bottom of the cover plate, with the bottom of the limit blocks extending into the inner cavity of the limit grooves. In practical applications, by setting the limit blocks, the cover plate is positioned to ensure accurate installation and increase the stability of the connection between the cover plate and the housing, preventing displacement of the cover plate during use.

[0011] In the aforementioned rust-resistant automotive wheel hub bearing, the first and second sealing lips are both located on the left side of the roller, and the third sealing lip is located on the right side of the roller.

[0012] In the aforementioned rust-resistant automotive wheel hub bearing, a limiting ring is fitted on the left side of the first sealing lip surface, and a retaining ring is fitted on the right side of the first sealing lip surface. In practical applications, by setting the limiting ring, the correct position of the first sealing lip can be ensured during installation and use, improving the sealing effect. By setting the retaining ring, the loosening or displacement of the first sealing lip during operation can be prevented, ensuring the stability and sealing performance of the sealing structure.

[0013] Compared with existing technologies, the advantages of this anti-corrosion automotive wheel hub bearing are: it allows the sealing lip to fit more tightly with the inner ring, improving the sealing effect; the addition of a double-lip end face design forms a contact seal with the mudguard, preventing mud and water from entering the rolling surface, and extending its service life. Attached Figure Description

[0014] Figure 1 This is a front view of a rust-resistant automotive wheel hub bearing.

[0015] Figure 2 This is a cross-sectional view of a rust-resistant automotive wheel hub bearing.

[0016] Figure 3 This is a left view of the anti-rust automotive wheel hub bearing.

[0017] Figure 4 This is a rust-resistant automotive wheel hub bearing. Figure 2 A magnified view of A in the middle.

[0018] Figure 5 This is a rust-resistant automotive wheel hub bearing. Figure 2 A magnified view of B in the middle.

[0019] Figure 6 This is a rust-resistant automotive wheel hub bearing. Figure 2 A magnified view of C.

[0020] Figure 7 This is a cross-sectional view of the drying assembly of this rust-resistant automotive wheel hub bearing.

[0021] In the diagram, 1. Inner ring; 2. Outer ring; 3. Roller; 4. First sealing lip; 5. Second sealing lip; 6. Third sealing lip; 7. Sealing cover; 8. Sealing gasket; 9. Drive shaft; 10. O-ring seal; 11. Protective sleeve; 12. Drying assembly; 1201. Housing; 1202. Desiccant; 1203. Cover plate; 1204. Feed hole; 1205. Drying hole; 1206. Limiting block; 13. Limiting ring; 14. Snap ring. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, this anti-corrosion automotive wheel hub bearing includes an inner ring 1 and an outer ring 2. Rollers 3 are movably connected between the inner ring 1 and the outer ring 2 via a cage. A first sealing lip 4 and a second sealing lip 5 are respectively fitted onto the left side of the inner ring 1 surface. The first sealing lip 4 covers the surface of the outer ring 2, and the left side of the second sealing lip 5 extends into the interior of the first sealing lip 4. A third sealing lip 6 is provided between the inner ring 1 and the outer ring 2, and the third sealing lip 6 is fixedly fitted onto the surface of the inner ring 1. A sealing cap 7 is fitted onto the right side of the outer ring 2 surface. A sealing gasket 8 is provided inside the inner ring 1. A drive shaft 9 is inserted into the left side of the inner ring 1. The sealing gasket 8 is located on the right side of the drive shaft 9. An O-ring 10 is fitted on the right side of the surface of the drive shaft 9. The outer surface of the O-ring 10 is in close contact with the inner wall of the inner ring 1. A protective sleeve 11 is fixedly fitted on the left side of the surface of the outer ring 2. A drying component 12 is fixedly connected through the top and bottom of the protective sleeve 11. The drying component 12 includes a housing 1201. A desiccant 1202 is placed in the inner cavity of the housing 1201.

[0024] In actual manufacturing, a cover plate 1203 is bolted to the top of the housing 1201, and feed holes 1204 are provided on both sides of the top of the housing 1201. A drying hole 1205 is provided at the bottom of the housing 1201, and the diameter of the drying hole 1205 is smaller than the diameter of the desiccant 1202.

[0025] Limiting grooves are provided on both sides of the top of the housing 1201, and limiting blocks 1206 are riveted to both sides of the bottom of the cover plate 1203. The bottom of the limiting block 1206 extends into the inner cavity of the limiting groove.

[0026] The first sealing lip 4 and the second sealing lip 5 are both located on the left side of the roller 3, and the third sealing lip 6 is located on the right side of the roller 3. A limiting ring 13 is fitted on the left side of the surface of the first sealing lip 4, and a retaining ring 14 is fitted on the right side of the surface of the first sealing lip 4.

[0027] This anti-corrosion automotive wheel hub bearing has a second sealing lip 5 and a first sealing lip 4 installed on the left side of the inner ring 1 surface. The second sealing lip 5 is fixed by a retaining ring 14, and the first sealing lip 4 is fixed by a limiting ring 13. Then, a protective sleeve 11 is fitted onto the surface of the outer ring 2. Under the action of the first sealing lip 4 and the second sealing lip 5, a multi-layer sealing structure is formed, making the first sealing lip 4 fit more tightly with the inner ring 1, effectively preventing mud and water from entering the bearing rolling surface from the left. The third sealing lip 6 is located on the right side of the roller 3 and can cooperate with the outer ring 2 to further prevent mud and water from entering from the right side, ensuring sealing performance. The sealing cover 7 can limit the third sealing lip 6. During daily use, the desiccant 1202 inside the housing 1201 dries the inside of the protective sleeve 11 through the drying hole 1205 to prevent moisture from corroding the sealing lip, thereby maintaining the performance of the sealing structure.

[0028] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A rust-resistant automotive wheel hub bearing, comprising an inner ring (1) and an outer ring (2), characterized in that: A roller (3) is movably connected between the inner ring (1) and the outer ring (2) via a retainer. A first sealing lip (4) and a second sealing lip (5) are respectively fitted on the left side of the surface of the inner ring (1). The first sealing lip (4) covers the surface of the outer ring (2). The left side of the second sealing lip (5) extends into the interior of the first sealing lip (4). A third sealing lip (6) is provided between the inner ring (1) and the outer ring (2). The third sealing lip (6) is fixedly fitted on the surface of the inner ring (1). A sealing cap (7) is fitted on the right side of the surface of the outer ring (2). A sealing gasket is provided inside the inner ring (1). The inner ring (1) is connected to a drive shaft (9) on the left side. The sealing gasket (8) is located on the right side of the drive shaft (9). An O-ring (10) is fitted on the right side of the surface of the drive shaft (9). The outer surface of the O-ring (10) is in close contact with the inner wall of the inner ring (1). A protective sleeve (11) is fixedly fitted on the left side of the surface of the outer ring (2). A drying component (12) is fixedly connected through the top and bottom of the protective sleeve (11). The drying component (12) includes a housing (1201). A desiccant (1202) is placed in the inner cavity of the housing (1201).

2. The anti-corrosion automotive wheel hub bearing according to claim 1, characterized in that, The top of the housing (1201) is bolted to a cover plate (1203), and feed holes (1204) are provided on both sides of the top of the housing (1201).

3. The anti-corrosion automotive wheel hub bearing according to claim 1, characterized in that, The bottom of the housing (1201) is provided with a drying hole (1205), the diameter of which is smaller than the diameter of the desiccant (1202).

4. The anti-corrosion automotive wheel hub bearing according to claim 2, characterized in that, The housing (1201) has limit grooves on both sides of the top, and the cover plate (1203) has limit blocks (1206) riveted to both sides of the bottom. The bottom of the limit block (1206) extends into the inner cavity of the limit groove.

5. The anti-corrosion automotive wheel hub bearing according to claim 1, characterized in that, The first sealing lip (4) and the second sealing lip (5) are both located on the left side of the roller (3), and the third sealing lip (6) is located on the right side of the roller (3).

6. The anti-corrosion automotive wheel hub bearing according to claim 1, characterized in that, A limiting ring (13) is fitted on the left side of the surface of the first sealing lip (4), and a retaining ring (14) is fitted on the right side of the surface of the first sealing lip (4).

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