Inner lip type combined seal for hub bearing

Abstract

The utility model relates to the technical field of hub bearings, in particular to an inner lip type combined seal for a hub bearing, which comprises an outer ring and an inner ring which are oppositely arranged, a concave framework I and a concave framework II are arranged on the opposite sides of the inner circumferential surface of the outer ring and the outer circumferential surface of the inner ring, and the concave framework I and the concave framework II are oppositely arranged. Sealing structures used for improving sealing performance are arranged on the first concave framework and the second concave framework, each sealing structure comprises a first sealing lip making contact with the first concave framework, a second sealing lip making contact with the second concave framework, a third sealing lip is fixedly installed on the opposite sides of the first sealing lip and the second sealing lip, and a mounting groove is formed in the third sealing lip; and an elastic check ring is fixedly embedded in the mounting groove. Compared with hub bearing sealing in the prior art, the sealing structure is arranged, so that the sealing performance is improved, unstable sealing performance caused by slipping and loosening of a sealing material is prevented, and the reliability of the whole system is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub bearings, in particular to an inner lip type combined seal for a wheel hub bearing. Background Art

[0002] The primary function of a wheel hub bearing is to bear weight and provide precise guidance for the rotation of the wheel hub. It bears both axial and radial loads, making it a key component in the automotive industry. The dense structure within the integrated wheel hub bearing is crucial for protecting the internal grease injection and preventing the ingress of external contaminants.

[0003] In the current technological landscape, sealed bearings are typically constructed by selecting a suitable sealing material (such as rubber or polyurethane) and then precisely installing it to ensure the desired sealing effect. However, due to the inability of the sealing material to form good contact with the bearing surface, sealing performance deteriorates and lubricant leaks occur. Furthermore, during operation, the sealing material can easily slip and loosen, resulting in unstable sealing performance and, in turn, affecting the reliability of the entire system. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that the sealing material fails to form good contact with the bearing surface, resulting in a decrease in sealing performance and leakage of lubricating oil; at the same time, during the operation of the bearing, the sealing material is prone to slipping and loosening, resulting in unstable sealing performance, thereby affecting the reliability of the entire system. An inner lip combination seal for a wheel hub bearing is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An inner lip combined seal for a hub bearing comprises an outer ring and an inner ring arranged opposite to each other, wherein a first concave frame and a second concave frame are provided on opposite sides of the inner circumferential surface of the outer ring and the outer circumferential surface of the inner ring, and the first concave frame and the second concave frame are arranged opposite to each other;

[0007] The concave frame 1 and the concave frame 2 are provided with sealing structures for improving sealing performance.

[0008] Preferably, the sealing structure includes a sealing lip 1 in contact with a concave frame 1, a sealing lip 2 in contact with a concave frame 2, and a same sealing lip 3 fixedly installed on opposite sides of the sealing lip 1 and the sealing lip 2. The sealing lip 3 is provided with a mounting groove, and an elastic retaining ring is fixedly embedded in the mounting groove.

[0009] Preferably, a wrapping pad is attached to the concave frame 1, and sealing lips 4 and 5 are in contact with the concave frame 2.

[0010] Preferably, the first sealing lip and the second sealing lip are symmetrically arranged with the elastic retaining ring as the center point.

[0011] Preferably, the wrapping pad is wrapped and attached to a top portion of the concave frame.

[0012] Preferably, the sealing lip five is wrapped and attached to the bottom of the concave frame two.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model sets up the sealing structure, wherein the sealing lip 1 and the sealing lip 2 are in contact with the concave frame 1 and the concave frame 2 respectively, and the same sealing lip 3 is installed on the opposite sides of the sealing lip 1 and the sealing lip 2. Through the synergistic effect of the sealing lip 1 and the sealing lip 2 and other components, the sealing performance is improved, and the leakage of lubricating oil is effectively prevented. At the same time, the sealing material is prevented from slipping and loosening, which may cause the sealing performance to be unstable, thereby ensuring the reliability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a concave frame of an inner lip type combined seal for a hub bearing proposed by the present invention installed on a hub bearing;

[0016] Figure 2 The utility model is a structural schematic diagram of an inner lip combined seal for a hub bearing.

[0017] In the figure: 1. Outer ring; 2. Inner ring; 3. Concave frame 1; 4. Concave frame 2; 5. Elastic retaining ring; 6. Sealing lip 1; 7. Sealing lip 2; 8. Sealing lip 3; 9. Wrapping pad; 10. Sealing lip 4; 11. Sealing lip 5. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-Figure 2 A wheel hub bearing inner lip combination seal includes an outer ring 1 and an inner ring 2 arranged opposite to each other. A concave frame 1 3 and a concave frame 2 4 are provided on opposite sides of the inner circumferential surface of the outer ring 1 and the outer circumferential surface of the inner ring 2, and the concave frame 1 3 and the concave frame 2 4 are arranged back to back. The back-to-back arrangement not only enhances the rigidity and stability of the sealing structure, but also provides strong support for the subsequent sealing structure.

[0020] The concave frame 1 3 and the concave frame 2 4 are provided with a sealing structure for improving the sealing performance.

[0021] The sealing structure includes a sealing lip 1 (6) in contact with the concave frame 1 (3), and a sealing lip 2 (7) in contact with the concave frame 2 (4). The two sealing lips fit tightly against the frame, forming a first line of defense that effectively prevents the intrusion of external impurities and moisture. The same sealing lip 3 (8) is fixedly installed on the opposite side of the sealing lip 1 (6) and the sealing lip 2 (7). The design of the sealing lip 3 (8) allows the three sealing lips to cooperate with each other, forming a multiple sealing effect, greatly improving the reliability and durability of the seal. A mounting groove is provided on the sealing lip 3 (8), and an elastic retaining ring 5 is fixedly embedded in the mounting groove. The provision of the elastic retaining ring 5 not only increases the elasticity and adaptability of the sealing structure, but also provides a certain buffering effect when subjected to external forces, thereby protecting the sealing structure from damage, further improving the overall performance of the combined seal, and enabling it to maintain a stable working state in various harsh environments.

[0022] A wrapping pad 9 is attached to the concave frame 1 (3). This design not only enhances the sealing performance of the concave frame 1 (3), but also improves its wear resistance and aging resistance, thereby extending the service life of the entire seal assembly. Seal lips 4 (10) and 5 (11) are attached to the concave frame 2 (4). The provision of seal lips 5 (11) strengthens the sealing structure, ensuring a stable seal under various operating conditions.

[0023] The first sealing lip 6 and the second sealing lip 7 are symmetrically arranged with the circlip 5 as the center point. This arrangement not only makes the entire sealing structure more beautiful and elegant, but also improves its balance and stability. When subjected to external forces, the two sealing lips can be evenly stressed, avoiding deflection or deformation, thereby ensuring the reliability and durability of the seal.

[0024] The wrapping pad 9 is wrapped and attached to the top of the concave frame 3. The wrapping pad 9 is in contact with the inner circumference of the outer ring 1.

[0025] The sealing lip 5 11 is wrapped and attached to the bottom of the concave frame 2 4. The sealing lip 5 11 is in contact with the outer circumference of the inner ring 2.

[0026] The functional principle of this utility model can be explained through the following operation modes:

[0027] Sealing lip one 6, sealing lip two 7, and sealing lip three 8 work together to form multiple sealing lines of defense, effectively preventing leakage of fluids or gases under high pressure differentials. The setting of the elastic retaining ring 5 brings additional elasticity and adaptability to the entire sealing structure, which enables the sealing structure to maintain stable performance under different temperature and pressure conditions and adapt to various complex working conditions. The wrapping pad 9 improves the wear resistance and aging resistance of the skeleton, helps to extend the service life of the seal, and reduces the replacement frequency and maintenance costs. The sealing lip four 10 and the sealing lip five 11 in contact with the concave skeleton two 4 further strengthen the sealing structure and enhance its overall stability and durability.

[0028] In summary, this combined seal achieves efficient and reliable sealing effects through careful design and optimization, ensuring that the wheel hub bearing works stably in various environments.

[0029] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An inner lip type combined seal for a hub bearing, comprising an outer ring (1) and an inner ring (2) arranged opposite to each other, characterized in that: A concave frame 1 (3) and a concave frame 2 (4) are provided on opposite sides of the inner circumferential surface of the outer ring (1) and the outer circumferential surface of the inner ring (2), and the concave frame 1 (3) and the concave frame 2 (4) are arranged in back-to-back relationship; The concave frame 1 (3) and the concave frame 2 (4) are provided with a sealing structure for improving the sealing performance; the sealing structure includes a sealing lip 1 (6) in contact with the concave frame 1 (3), and a sealing lip 2 (7) in contact with the concave frame 2 (4); the sealing lip 1 (6) and the sealing lip 2 (7) are fixedly installed on opposite sides of the sealing lip 3 (8), and the sealing lip 3 (8) is provided with a mounting groove, and an elastic retaining ring (5) is fixedly embedded in the mounting groove.

2. The inner lip combined seal for a hub bearing according to claim 1, characterized in that: A wrapping pad (9) is attached to the concave frame one (3), and a sealing lip four (10) and a sealing lip five (11) are in contact with the concave frame two (4).

3. The inner lip combined seal for a hub bearing according to claim 1, characterized in that: The sealing lip 1 (6) and the sealing lip 2 (7) are symmetrically arranged with the elastic retaining ring (5) as the center point.

4. The inner lip combined seal for a hub bearing according to claim 2, characterized in that: The wrapping pad (9) is wrapped and attached to the top of the concave frame (3).

5. The inner lip combined seal for a hub bearing according to claim 2, characterized in that: The sealing lip five (11) is wrapped and attached to the bottom of the concave frame two (4).

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