Single-lip oil seal

Abstract

The utility model discloses a single-lip oil seal which comprises an oil seal body and a rubber body, the oil seal body is in a circular ring shape, a shaft hole is formed in the center of the oil seal body, the rubber body is arranged on the shaft hole in a protruding mode, the rubber body is provided with a through hole corresponding to the shaft hole, and a first annular groove is formed between the oil seal body and the rubber body. The outer wall of the oil seal body extends outwards to be provided with a step sealing layer. According to the oil seal, the rubber body is arranged on the shaft hole of the oil seal body in the protruding mode, so that the sealing effect of the oil seal is improved, the phenomenon of loose contact between the oil seal and a shaft is not prone to occurring when an engine or various machines vibrate in the operation process, the situation of poor sealing or oil leakage is better avoided, and the service life of the oil seal is prolonged. The maintenance cost of the machine is reduced; in addition, the outer wall of the oil seal body extends outwards to be provided with a step sealing layer, and the step sealing layer can improve the connection sealing performance of the single-lip oil seal assembled on oil seal installation pieces such as a bearing chamber.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing elements, in particular to a single-lip oil seal. Background Art

[0002] At present, oil seals are often used on the shafts of engines or various machines. The oil seals are usually installed in the bearing chamber to play a sealing role. A shaft hole is arranged at the center of the oil seal. The shaft of the engine or various machines is penetrated in the shaft hole. The inner wall of the shaft hole is in close contact with the shaft to seal the shaft to prevent oil leakage and the like.

[0003] However, since engines or various machines often vibrate during operation, when the shaft vibrates too much, the connection between the inner wall of the oil seal shaft hole and the shaft is prone to loose contact, which will cause poor sealing or oil leakage. Therefore, the oil seal needs to be replaced frequently. If it is not replaced in time, the entire machine will be scrapped, causing unnecessary losses. In addition, the sealing performance of the oil seal and the bearing chamber assembly is poor. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a single-lip oil seal, which can solve the above technical problems.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a single-lip oil seal, comprising: an oil seal body and a rubber body, the oil seal body is in a circular ring shape, an axial hole is provided at the center of the oil seal body, a rubber body protrusion is provided on the axial hole, the rubber body is provided with a through hole corresponding to the axial hole, a first annular groove is formed between the oil seal body and the rubber body, and a stepped sealing layer is extended outward from the outer wall of the oil seal body.

[0008] Preferably, the rubber body is in an arch bridge shape.

[0009] Preferably, the oil seal body is made of metal.

[0010] Preferably, a second annular groove is provided at the bottom of the oil seal body.

[0011] Preferably, the diameter of the axial hole is 8 mm.

[0012] Preferably, the outer diameter of the step sealing layer is 22 mm.

[0013] Preferably, the diameter of the through hole is smaller than or equal to the diameter of the axial hole.

[0014] Preferably, a sealing ring is provided on the inner wall of the rubber body extending toward the center of the shaft hole.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a single-lip oil seal, which has the following beneficial effects: the single-lip oil seal of the utility model comprises an oil seal body and a rubber body, the oil seal body is in a circular ring shape, a shaft hole is arranged at the center of the oil seal body, the rubber body is convexly arranged on the shaft hole, the rubber body is provided with a through hole corresponding to the shaft hole, a first annular groove is formed between the oil seal body and the rubber body, and a stepped sealing layer is extended outwardly from the outer wall of the oil seal body; the utility model is provided with a rubber body convexly arranged on the shaft hole of the oil seal body, so that in addition to being able to tighten the shaft through the inner wall of the shaft hole In addition to close contact, the inner wall of the through hole of the rubber body is in close contact with the shaft, that is, the sealing contact area with the shaft can be increased, thereby improving the sealing effect of the oil seal, so that when the engine or various machines vibrate during operation, the connection between the oil seal and the shaft is not prone to loose contact, so as to better avoid poor sealing or oil leakage and reduce the maintenance cost of the machine; in addition, the outer wall of the oil seal main body of the utility model extends outward to be provided with a stepped sealing layer, which can improve the connection sealing of the single-lip oil seal assembled on the oil seal mounting parts such as the bearing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a first stereoscopic diagram of a single-lip oil seal of the utility model;

[0018] Figure 2 This is a second stereoscopic view of a single-lip oil seal of the utility model;

[0019] Figure 3 It is a cross-sectional view of a single-lip oil seal of the utility model.

[0020] The numbers in the figure are: 1 oil seal body, 2 rubber body, 3 shaft hole, 4 first annular groove, 5 step sealing layer, 6 second annular groove, 7 sealing ring. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1-Figure 3As shown, the single-lip oil seal of the utility model comprises an oil seal body 1 and a rubber body 2. The oil seal body 1 is in a circular ring shape, the center of the oil seal body 1 is provided with an axial hole 3, the rubber body 2 is convexly arranged on the axial hole 3, the rubber body 2 is provided with a through hole corresponding to the axial hole 3, a first annular groove 4 is formed between the oil seal body 1 and the rubber body 2, and the outer wall of the oil seal body 1 is extended outward to provide a stepped sealing layer 5.

[0023] It can be understood that the shaft of the engine or various machines is inserted into the through hole of the rubber body 2 and the shaft hole 3 of the oil seal body 1, so that the shaft can be closely contacted not only through the inner wall of the shaft hole 3, but also through the inner wall of the through hole of the rubber body 2, that is, the sealing contact area with the shaft can be increased, the sealing effect of the oil seal is improved, and the connection between the oil seal and the shaft is not prone to loose contact when the engine or various machines vibrate during operation.

[0024] In addition, the single-lip oil seal of the utility model can be assembled on oil seal mounting parts such as bearing chambers. By providing the above-mentioned stepped sealing layer 5, the connection sealing performance between the single-lip oil seal and the bearing chamber can be improved, further improving the sealing effect of the single-lip oil seal.

[0025] Preferably, the horizontal plane where the top surface of the rubber body 2 is located is higher than the horizontal plane where the top surface of the oil seal body 1 is located. In addition, the rubber body 2 can be specifically in the shape of an arch bridge, and of course other shapes can also be used, which is not too limited here.

[0026] The oil seal body 1 is preferably made of metal. In addition, a second annular groove 6 may be provided at the bottom of the oil seal body 1 .

[0027] Preferably, the diameter of the shaft hole 3 is 8 mm, and the outer diameter of the stepped sealing layer 5 is 22 mm. The diameter of the through hole of the rubber member 2 is smaller than or equal to the diameter of the shaft hole 3. Of course, the shaft hole 3 and the stepped sealing layer 5 of other sizes may be provided according to the size of the shaft, the size of the oil seal mounting parts such as the bearing chamber, etc.

[0028] In addition, in order to further improve the sealing performance of the single lip oil seal, a sealing ring 7 is provided on the inner wall of the rubber body 2 extending toward the center of the shaft hole 3, so as to improve the close contact between the rubber body and the shaft.

[0029] Compared with the prior art, the utility model provides a single-lip oil seal, which has the following beneficial effects: the single-lip oil seal of the utility model comprises an oil seal body and a rubber body, the oil seal body is in a circular ring shape, a shaft hole is arranged at the center of the oil seal body, the rubber body is convexly arranged on the shaft hole, the rubber body is provided with a through hole corresponding to the shaft hole, a first annular groove is formed between the oil seal body and the rubber body, and a stepped sealing layer is extended outwardly from the outer wall of the oil seal body; the utility model is provided with a rubber body convexly arranged on the shaft hole of the oil seal body, so that in addition to being able to tighten the shaft through the inner wall of the shaft hole In addition to close contact, the inner wall of the through hole of the rubber body is in close contact with the shaft, that is, the sealing contact area with the shaft can be increased, thereby improving the sealing effect of the oil seal, so that when the engine or various machines vibrate during operation, the connection between the oil seal and the shaft is not prone to loose contact, so as to better avoid poor sealing or oil leakage and reduce the maintenance cost of the machine; in addition, the outer wall of the oil seal main body of the utility model extends outward to be provided with a stepped sealing layer, which can improve the connection sealing of the single-lip oil seal assembled on the oil seal mounting parts such as the bearing chamber.

[0030] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single lip oil seal, characterized in that: include: An oil seal body and a rubber body, wherein the oil seal body is in a circular ring shape, an axial hole is provided at the center of the oil seal body, the rubber body protrusion is arranged on the axial hole, the rubber body is provided with a through hole corresponding to the axial hole, a first annular groove is formed between the oil seal body and the rubber body, and a stepped sealing layer is extended outward from the outer wall of the oil seal body.

2. The single lip oil seal according to claim 1, characterized in that: The rubber body is in an arch bridge shape.

3. The single lip oil seal according to claim 1, characterized in that: The oil seal body is made of metal.

4. The single lip oil seal according to claim 1, characterized in that: A second annular groove is provided at the bottom of the oil seal body.

5. The single lip oil seal according to claim 1, characterized in that: The diameter of the axial hole is 8 mm.

6. The single lip oil seal according to claim 1, characterized in that: The outer diameter of the step sealing layer is 22 mm.

7. The single lip oil seal according to claim 1, characterized in that: The aperture of the through hole is smaller than or equal to the aperture of the axial hole.

8. The single lip oil seal according to claim 1, characterized in that: A sealing ring is provided on the inner wall of the rubber body extending toward the center of the shaft hole.

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