Novel shaft-grinding-free self-rotating framework oil seal

Abstract

The utility model discloses a novel shaft-grinding-free self-rotating type framework oil seal which comprises an outer oil seal framework, an outer sealing body, an inner oil seal framework and an inner sealing body. The outer oil seal framework is arranged on one side of the inner oil seal framework, the outer oil seal framework is embedded in one side of the outer sealing body, and the inner oil seal framework is embedded in the inner sealing body; a dustproof lip set and a main sealing lip are sequentially arranged on the side, close to the inner oil seal framework, of the outer sealing body, and an oil seal is formed between the dustproof lip set and the main sealing lip. According to the utility model, the rotating shaft is not rubbed, so that the service life of the rotating shaft is prolonged; the dustproof lip set effectively prevents external muddy water and sand dust from entering the sealing cavity of the oil seal, most engine oil is sealed through the arrangement of the main sealing lip, the oil leakage condition is reduced, and the sealing effect of the oil seal is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing seals, and more specifically relates to a new type of non-shaft-abrasive self-rotating skeleton oil seal. Background Art

[0002] The function of an oil seal is to isolate the components that need lubrication in the transmission components from the external environment to avoid lubricating oil leakage. Generally speaking, an oil seal refers to a skeleton oil seal. At present, in the part where the rotating shaft is in long-term contact with the oil seal, due to long-term friction, damage is caused, forming grooves, which causes irreparable damage to the shaft, and the replacement and maintenance costs are high. Moreover, the skeleton oil seal is also easily worn and oil leakage occurs. If the skeleton is not replaced in time, the lubricating oil will be reduced, and even accidents will occur. Content of the Utility Model

[0003] In view of this, the utility model aims to solve at least one of the above problems in the background art, and provides a new type of non-shaft-abrasive self-rotating skeleton oil seal, which does not generate friction on the rotating shaft, thereby improving the service life of the rotating shaft; the dust-proof lip group effectively prevents external mud, water and sand from entering the sealing cavity of the oil seal, and the main sealing lip seals the vast majority of engine oil, reducing the occurrence of oil leakage and greatly improving the sealing effect of the oil seal.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A new type of non-shaft-abrasive self-rotating skeleton oil seal, comprising: an outer oil seal skeleton, an outer seal body, an inner oil seal skeleton and an inner seal body; the outer oil seal skeleton is arranged on one side of the inner oil seal skeleton, and the outer oil seal skeleton is embedded in one side of the outer seal body, and the inner oil seal skeleton is embedded in the inner seal body; a dust-proof lip group and a main sealing lip are sequentially arranged on the side of the outer seal body close to the inner oil seal skeleton, and an oil seal is formed between the dust-proof lip group and the main sealing lip.

[0006] Further, both the inner oil seal skeleton and the outer oil seal skeleton are in an "L" shape.

[0007] Further, the dust-proof lip group includes a plurality of first dust-proof lips and second dust-proof lips. One end of the first dust-proof lip is connected to the outer seal body, and the other end abuts against the inner oil seal skeleton; one end of the outer seal body extends to the top side of the inner oil seal skeleton, and it is connected to the second dust-proof lip, and the end of the second dust-proof lip abuts against the inner oil seal skeleton.

[0008] Further, a secondary sealing lip is connected to the position of the inner seal body close to the end of the outer oil seal skeleton, and the end of the secondary sealing lip abuts against the inner oil seal skeleton.

[0009] Further, a first slot is provided on one side of the main sealing lip, and an oil seal spring is arranged in the first slot.

[0010] Further, a second groove is provided on one side of the auxiliary sealing lip, and a locking spring is arranged in the second groove.

[0011] Further, it further includes a support ring. A convex edge is provided on the outer side of the outer sealing body. One end of the support ring abuts against the outer side of the outer oil seal skeleton, and the other end abuts against the convex edge.

[0012] Further, a polytetrafluoroethylene film layer is coated on the side of the inner oil seal skeleton close to the main sealing lip and on the side of the outer oil seal skeleton close to the auxiliary sealing lip.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The structure of the present utility model is simple and does not cause friction to the rotating shaft, thereby improving the service life of the rotating shaft; the dust-proof lip group effectively prevents external mud, water and sand from entering the sealing cavity of the oil seal. The main sealing lip seals the vast majority of engine oil, reduces the occurrence of oil leakage, and greatly improves the sealing effect of the oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0016] Figure 1 It is a structural schematic diagram of the present utility model.

[0017] Among them, in the figure:

[0018] 1 - outer oil seal skeleton; 2 - outer sealing body; 3 - inner oil seal skeleton; 4 - inner sealing body; 5 - main sealing lip; 6 - oil seal; 7 - first dust-proof lip; 8 - second dust-proof lip; 9 - auxiliary sealing lip; 10 - oil seal spring; 11 - locking spring; 12 - support ring; 13 - polytetrafluoroethylene film layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in combination with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Reference Figure 1 The utility model provides a novel non - shaft - grinding self - rotating skeleton oil seal, including: an outer oil - seal skeleton 1, an outer seal body 2, an inner oil - seal skeleton 3 and an inner seal body 4; the outer oil - seal skeleton 1 is arranged on one side of the inner oil - seal skeleton 3, and the outer oil - seal skeleton 1 is embedded in one side of the outer seal body 2, and the inner oil - seal skeleton 3 is embedded in the inner seal body 4; on the side of the outer seal body 2 close to the inner oil - seal skeleton 3, a dust - proof lip group and a main seal lip 5 are sequentially arranged, and an oil seal 6 is formed between the dust - proof lip group and the main seal lip 5. Using the skeleton oil seal of the utility model increases the flow resistance of the leaked lubricating oil, reduces the flow pressure of the lubricating oil, avoids the leakage of the lubricating oil, and greatly reduces the shaft wear.

[0021] In a further optimized scheme, both the inner oil - seal skeleton 3 and the outer oil - seal skeleton 4 are in an "L" shape, with a relatively regular shape, which is convenient for processing.

[0022] In a further optimized scheme, the dust - proof lip group includes a plurality of first dust - proof lips 7 and a second dust - proof lip 8. One end of the first dust - proof lip 7 is connected to the outer seal body 2, and the other end abuts against the inner oil - seal skeleton 3; one end of the outer seal body 2 extends to the top side of the inner oil - seal skeleton 3 and is connected to the second dust - proof lip 8, and the end of the second dust - proof lip 8 abuts against the inner oil - seal skeleton 3. In this embodiment, two first dust - proof lips are provided, which ensure the dust - proof effect while reducing the cost of the oil seal. The setting of the second dust - proof lip further improves the protection effect against mud, water and dust.

[0023] In a further optimized scheme, a secondary seal lip 9 is connected to the position of the inner seal body 4 close to the end of the outer oil - seal skeleton 1, and the end of the secondary seal lip 9 abuts against the inner oil - seal skeleton 3, further improving the sealing performance of the skeleton oil seal.

[0024] In a further optimized scheme, a first slot is arranged on one side of the main seal lip 5, and an oil - seal spring 10 is arranged in the first slot. Applying a force to the main seal lip to approach the rotating shaft can effectively solve the problem that the main seal lip cannot continue to seal due to wear, and increase the service life of the skeleton oil seal.

[0025] In a further optimized scheme, a second groove is arranged on one side of the secondary seal lip 9, and a locking spring 11 is arranged in the second groove. Applying a force to the secondary seal lip to approach the rotating shaft can effectively solve the problem that the secondary seal lip cannot continue to seal due to wear, and increase the service life of the skeleton oil seal.

[0026] In a further optimized scheme, it further includes a support ring 12. A convex edge is arranged on the outer side of the outer seal body 2. One end of the support ring 12 abuts against the outer side of the outer oil - seal skeleton 1, and the other end abuts against the convex edge, ensuring the balance of the press - fitting of the skeleton oil seal and reducing the generation of the eccentricity of the inclined installation.

[0027] For a further optimized solution, a polytetrafluoroethylene film layer 13 is coated on one side of the inner oil seal skeleton 3 close to the main sealing lip 5 and one side of the outer oil seal skeleton 1 close to the secondary sealing lip 9. By using the polytetrafluoroethylene film layer, the friction heat generation coefficient with the main sealing lip and the secondary sealing lip can be reduced, thereby improving the service life of the main sealing lip and the secondary sealing lip.

[0028] For a further optimized solution, return lines are provided at positions corresponding to the main sealing lip of the inner oil seal skeleton and at positions corresponding to the secondary sealing lip of the outer oil seal skeleton, and the return lines are designed as oil return grooves formed by a single-direction spiral, i.e., left-handed or right-handed.

[0029] The structure of the utility model is simple and does not cause friction to the rotating shaft, thereby improving the service life of the rotating shaft; the dust-proof lip group effectively prevents external mud, water and sand from entering the sealed cavity of the oil seal, and the main sealing lip seals the vast majority of engine oil, reducing the occurrence of oil leakage and greatly improving the sealing effect of the oil seal.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new type of non-wearing shaft self-rotating skeleton oil seal, characterized in that: include: An outer oil seal skeleton, an outer sealing body, an inner oil seal skeleton and an inner sealing body; the outer oil seal skeleton is arranged on one side of the inner oil seal skeleton, and the outer oil seal skeleton is embedded in one side of the outer sealing body, and the inner oil seal skeleton is embedded in the inner sealing body; a dustproof lip group and a main sealing lip are sequentially arranged on one side of the outer sealing body close to the inner oil seal skeleton, and an oil seal is formed between the dustproof lip group and the main sealing lip.

2. A novel non-wearing self-rotating skeleton oil seal according to claim 1, characterized in that: The inner oil seal frame and the outer oil seal frame are both in an "L" shape.

3. A novel non-wearing self-rotating skeleton oil seal according to claim 1, characterized in that: The dust lip group includes multiple first dust lips and second dust lips, one end of the first dust lip is connected to the outer sealing body, and the other end abuts against the inner oil seal frame; one end of the outer sealing body extends to the top side of the inner oil seal frame, and is connected to the second dust lip, and the end of the second dust lip abuts against the inner oil seal frame.

4. A novel non-wearing self-rotating skeleton oil seal according to claim 3, characterized in that: The inner sealing body is connected with a secondary sealing lip at a position close to the end of the outer oil seal frame, and the end of the secondary sealing lip abuts against the inner oil seal frame.

5. A novel non-wearing self-rotating skeleton oil seal according to claim 4, characterized in that: A first slot hole is arranged on one side of the main sealing lip, and an oil seal spring is arranged in the first slot hole.

6. A novel non-wearing self-rotating skeleton oil seal according to claim 5, characterized in that: A second groove is arranged on one side of the secondary sealing lip, and a locking spring is arranged in the second groove.

7. A novel non-wearing self-rotating skeleton oil seal according to claim 6, characterized in that: It also includes a support ring. The outer side of the outer sealing body is provided with a convex edge. One end of the support ring abuts against the outer side of the outer oil seal skeleton, and the other end abuts against the convex edge.

8. A novel non-wearing self-rotating skeleton oil seal according to claim 7, characterized in that: A side of the inner oil seal frame close to the main sealing lip and a side of the outer oil seal frame close to the auxiliary sealing lip are both coated with a polytetrafluoroethylene film layer.

Images