Efficient muddy water prevention oil seal

Abstract

The utility model relates to an efficient muddy water-proof oil seal which comprises a first oil sealing part, the first oil sealing part is fixed by a first tightening spring and wraps a first reinforcing framework, the first oil sealing part is further provided with a first lip, the efficient muddy water-proof oil seal further comprises a second oil sealing dustproof part, the second oil sealing dustproof part is provided with a second lip and a third lip, and the third lip is provided with a third lip. The first oil sealing dustproof part wraps a first reinforcing framework and is fixed through a second tightening spring and a third tightening spring, the second oil sealing dustproof part wraps a second reinforcing framework, and the first oil sealing part and the second oil sealing dustproof part are connected to a third reinforcing framework through the first reinforcing framework and the second reinforcing framework in an interference fit mode respectively. The third reinforcing framework is in a step shape, the outer portion of the step shape is coated with an anti-skid portion, the anti-skid portion is made of rubber materials, and the third reinforcing framework is made of metal materials. By arranging the dustproof lip made of rubber and the reinforcing framework made of metal, the oil seal is effectively prevented from axially moving, the oil seal groove is protected, and the service life of the oil seal is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil seal, in particular to an oil seal with high efficiency of preventing mud and water. BACKGROUND

[0002] In the traditional oil seal structure design, the outer side is often fully wrapped by rubber. As the main material of the outer side of the oil seal, the rubber will inevitably age due to the continuous effect of various complex environmental factors in the long-term use process. This aging will cause significant changes in the physical and chemical properties of the rubber, such as the rubber gradually losing its original elasticity and flexibility, becoming stiff and brittle. As the degree of aging deepens, the close-fitting degree between the outer side rubber of the oil seal and the side wall it contacts will be greatly reduced. The originally close and gapless joint surface begins to have gaps, and the friction and adhesion between the two will also be greatly reduced. In this way, the oil seal is prone to axial movement during operation. Once axial movement occurs, the oil seal is difficult to accurately maintain at its originally designed optimal working position, thereby causing the sealing performance of the oil seal to deteriorate seriously, failing to effectively prevent the leakage of liquids or gases, and ultimately having a very adverse effect on the quality of the entire oil seal and the normal operation of related mechanical equipment, and even possibly causing a series of safety hazards and equipment failures. SUMMARY

[0003] In view of the problems in the prior art, the utility model provides an oil seal with high efficiency of preventing mud and water, which comprises a first oil sealing part, the first oil sealing part is fixed by a first clamping spring, covers a first reinforcing framework, and has a first lip on the first oil sealing part; the oil seal further comprises a second oil sealing and dustproof part, the second oil sealing and dustproof part has a second lip and a third lip, is fixed by a second clamping spring and a third clamping spring, and covers a second reinforcing framework; the first oil sealing part and the second oil sealing and dustproof part are connected to a third reinforcing framework in interference fit through the first reinforcing framework and the second reinforcing framework respectively, the third reinforcing framework is of a stepped type, and the outer part of the stepped type is covered with an anti-skid part. The anti-skid part has a fifth lip. The radial included angle between the fourth lip and the fifth lip and the third reinforcing framework is 15°-35°. The setting of the angle can prevent the lip from turning inward during installation, thereby greatly reducing the oil sealing and dustproof effects. The third reinforcing framework is of metal material, and the anti-skid part is of rubber material, so that the combination of the two can simultaneously achieve the functions of fixation and sealing. The product is not prone to axial movement under this design, and the sealing degree and service life of the oil seal are improved.

[0004] Further, a third dustproof part is filled between the third reinforcing framework and the second oil sealing and dustproof part. The dustproof part is of polyurethane material. On the one hand, the third dustproof part has a fourth lip. The lip of this material has a higher hardness, so the dustproof effect is better than that of rubber. On the other hand, the filling of the polyurethane material can support the second oil sealing and dustproof part and the first oil sealing part.

[0005] Preferably, the first oil sealing part, the second oil sealing and dustproof part and the anti-skid part are made of rubber, and the covering mode is vulcanization combination.

[0006] The utility model has the following advantages:

[0007] 1. The semi-rubber and semi-iron structure is adopted, the semi-iron plays a fixing role, and the semi-rubber plays a sealing role, the product is not prone to axial movement under this design, the oil sealing groove after finishing machining can be effectively protected, and the service life of the oil seal is prolonged;

[0008] 2. The radial included angle between the fourth lip and the fifth lip and the third reinforcing framework is 15°~35°, the lip inversion during installation can be effectively prevented, the oil sealing and dustproof effects are not affected, normal work of the oil seal is ensured, a plurality of lips are arranged, and the protection level can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a sectional view of the oil seal (half).

[0010] Figure 2 It is a sectional view of the oil seal after installation (half). DETAILED DESCRIPTION

[0011] The utility model will be described in detail below in combination with the drawings.

[0012] As shown in the drawings, Figure 1 An oil seal capable of effectively preventing mud and water, comprising a first oil sealing part 1, the first oil sealing part 1 is fixed by a first clamping spring 10 and covered on a first reinforcing framework 9, and a first lip 101 is arranged on the first oil sealing part 1; the oil sealing part 1 further comprises a second oil sealing and dustproof part 3, the second oil sealing and dustproof part 3 is provided with a second lip 102 and a third lip 103 and is fixed by a second clamping spring 2 and a third clamping spring 5, and the second oil sealing and dustproof part 3 is covered on a second reinforcing framework 4; the first oil sealing part 1 and the second oil sealing and dustproof part 3 are connected to a third reinforcing framework 8 in an interference fit mode through the first reinforcing framework 9 and the second reinforcing framework 4 respectively, the third reinforcing framework 8 is in a stepped type, the outer part of the stepped type is covered with an anti-skid part 7, the anti-skid part 7 is provided with a fifth lip 105, and the covering mode is vulcanization combination.

[0013] A third dustproof part 6 is filled between the third reinforcing framework 8 and the second oil sealing and dustproof part 3, and the third dustproof part 6 is provided with a fourth lip 104.

[0014] The radial included angle between the fourth lip 104 and the fifth lip 105 and the third reinforcing framework 8 is 15°~35°.

[0015] The first oil sealing part 1, the second oil sealing and dustproof part 3 and the anti-skid part 7 are made of rubber.

[0016] The oil seal provided by the utility model is of annular structure, and is connected to the shell 200 in interference fit with the third reinforcing framework 8 and the anti-skid part 7 Figure 2 The first lip 101, the second lip 102 and the third lip 103 are tightly pressed on the rotating shaft 201 through the first clamping spring, the second clamping spring and the third clamping spring respectively, and the fourth lip 104 and the fifth lip 105 abut against the rotating shaft 201. The material hardness of the third reinforcing framework 8 is preferably less than that of the shell 200, so that the abrasion of the shell 200 during use and installation can be reduced.

[0017] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0018] Although the specific embodiments of the utility model have been described above, the utility model is not limited by the above description, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A highly efficient mud- and water-resistant oil seal, characterized in that, include: The first oil sealing part (1) is fixed by the first clamping spring (10) and covers the first reinforcing frame (9). The first oil sealing part (1) also has a first lip (101). It also includes a second oil-sealing and dust-proof part (3), which has a second lip (102) and a third lip (103) and is fixed by a second clamping spring (2) and a third clamping spring (5). The second oil-sealing and dust-proof part (3) covers the second reinforcing frame (4). The first oil sealing part (1) and the second oil sealing and dustproof part (3) are respectively connected to the third reinforcing frame (8) through the first reinforcing frame (9) and the second reinforcing frame (4) with an interference fit. The third reinforcing frame (8) is stepped and the outside of the stepped type is covered with an anti-slip part (7). The anti-slip part (7) is made of rubber, and the third reinforcing frame (8) is made of metal.

2. The high-efficiency mud- and water-resistant oil seal as described in claim 1, characterized in that, The third dustproof part (6) is filled between the third reinforcing frame (8) and the second sealing and dustproof part (3).

3. The high-efficiency mud- and water-resistant oil seal as described in claim 2, characterized in that, The third dustproof part (6) has a fourth lip (104).

4. The oil seal with high efficiency and mud and water resistance as described in claim 3, characterized in that, The anti-slip part (7) has a fifth lip (105).

5. The high-efficiency mud- and water-resistant oil seal as described in claim 4, characterized in that, The radial angle between the fourth lip (104) and the fifth lip (105) and the third reinforcing skeleton (8) is 15°~35°.

6. The high-efficiency mud-proof oil seal as described in claim 1, characterized in that, The first sealing oil part (1) and the second sealing oil dustproof part (3) are made of rubber.

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