Oil seal allowing rotation and axial movement

Abstract

The utility model relates to an oil seal allowing rotation and axial movement. Comprising a bearing, an inner framework, an oil sealing dustproof part and the like, an outer ring of the bearing is in interference fit with the inner framework, the oil sealing dustproof part is fixedly connected with the inner framework and located in a containing groove of the oil sealing dustproof framework, a tightening spring enables an oil sealing lip and an oil sealing dustproof lip to abut against the oil sealing dustproof framework, a bent part of an outer sealing part is made of flexible materials, and the inner framework is fixedly connected with the outer sealing part. The oil seal is arranged in the oil seal, the position is limited through embedding, interference fit and the reinforcing framework, the sealing performance is not affected during axial movement, and machine parts and finish machining positions can be prevented from being damaged. And the bending part of the outer sealing part allows certain axial movement, and the oil seal is convenient to replace. According to the oil seal, when the rotating shaft rotates or axially moves, the reliability of the sealing position between the oil sealing dustproof part and the oil sealing dustproof framework can be guaranteed, the good oil sealing dustproof effect is achieved, the service life is long, and the application prospect is wide.

Description

TECHNICAL FIELD

[0001] The utility model discloses an oil seal, especially an oil seal allowing rotation and axial movement. BACKGROUND

[0002] The existing oil seal will inevitably move axially, and this movement will cause the oil seal to deviate from its original position, which is mostly finely processed. When the oil seal deviates from the processed position, it will cause the sealing quality to decrease, and even damage the machine parts and the finely processed position. The utility model provides an oil seal, which sets the oil seal position in the oil seal. Even if the oil seal as a whole moves axially, it will not cause the oil seal position to deviate from the finely processed position, thereby preventing damage to the machine parts and the finely processed position. The oil seal can also rotate with the central shaft. SUMMARY

[0003] To solve the above technical problems, the utility model provides an oil seal allowing rotation and axial movement, which is as follows:

[0004] The oil seal comprises a bearing, an inner framework, an oil sealing and dustproof part, a clamping spring, an oil sealing and dustproof framework, an outer sealing part, a first outer framework and a second outer framework. The outer ring of the bearing is in interference fit with the inner framework. The oil sealing and dustproof part is fixedly connected with the inner framework. The oil sealing and dustproof part has an oil sealing lip and a first oil sealing and dustproof lip. The oil sealing and dustproof part is located in a containing groove formed by the oil sealing and dustproof framework and cooperates with the oil sealing and dustproof framework. The clamping spring clamps the oil sealing and dustproof part, so that the oil sealing lip is pressed on the oil sealing and dustproof framework, and the first oil sealing and dustproof lip abuts against the oil sealing and dustproof framework. The first outer framework and the second outer framework are wrapped on the inner and outer sides of the outer sealing part. The bending part of the outer sealing part is made of flexible material. The inner framework is fixedly connected with the outer sealing part. For example, the inner framework and the outer sealing part can be fixedly connected by interference fit. The first outer framework provides support.

[0005] Since the bending part of the outer sealing part is made of flexible material, when axial movement occurs, the second outer framework on the left side of the bending part will adhere to the shell, and the right side as a whole will move together. When moving, the oil sealing lip will still be pressed on the oil sealing and dustproof framework, and will not displace relative to the oil sealing and dustproof framework, thereby ensuring the sealing effect.

[0006] When rotating, the bearing and the second outer framework will rotate with the rotating shaft, and other parts will remain in place. Therefore, various lips will not deviate from their original working positions due to rotation.

[0007] Further, the oil sealing and dustproof part further has a second oil sealing and dustproof lip, which is arranged on a different side of the inner framework from the first oil sealing and dustproof lip.

[0008] Preferably, the inner skeleton has a groove, and the outer sealing part is partially embedded in the groove, so that the inner skeleton and the outer sealing part are more closely matched, and the shearing force between them during axial movement can be overcome.

[0009] Further, the outer sealing part has a dustproof lip, and the dustproof lip is tightly abutted against the oil sealing and dustproof skeleton. The multiple and multi-position oil sealing and dustproof lips can enhance the oil sealing and dustproof effect, and can greatly prolong the service life of the oil seal.

[0010] Preferably, the first outer skeleton is bent to form a stop part, which can strengthen the first outer skeleton and the stop bearing.

[0011] The oil seal has a U-shaped cross section.

[0012] The present application has the following advantages:

[0013] 1. The oil seal position is arranged in the oil seal, and the oil seal position is fixed by means of fitting and interference fit, and the position of the oil seal is limited by the radial protrusion of the reinforcing skeleton. Even if the oil seal moves axially, since the oil seal position is inside the oil seal, the sealing property will not be affected, and the damage to the parts or the finish position of the machine can be effectively prevented.

[0014] 2. The oil seal has a soft bending part, which allows the oil seal to move axially to a certain extent, and facilitates replacement of the oil seal. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional side view (half) of the oil seal.

[0016] Figure 2 is a schematic view of the installation and use of the oil seal (half). DETAILED DESCRIPTION

[0017] The present application will be further described below with reference to the accompanying drawings.

[0018] As Figure 1As shown, the present application provides an oil seal that can allow rotation and axial movement, an oil seal that can allow rotation and axial movement, including bearing 1, inner skeleton 5, oil seal dustproof part 3, tight spring 4, oil seal dustproof skeleton 2, outer sealing part 7, first outer skeleton 6 and second outer skeleton 9. The outer ring of bearing 1 is interference fit with inner skeleton 5, oil seal dustproof part 3 is fixed with inner skeleton 5, oil seal dustproof part 3 has oil seal lip 30 and first oil seal dustproof lip 31, oil seal dustproof part 3 is located in the accommodating groove formed by oil seal dustproof skeleton 2 and cooperates with oil seal dustproof skeleton 2, tight spring 4 is tightly clamped on oil seal dustproof part 3 so that oil seal lip 30 is pressed on oil seal dustproof skeleton 2, first oil seal dustproof lip 31 is tightly pressed on oil seal dustproof skeleton 2, first outer skeleton 6 and second outer skeleton 9 are wrapped on the inner and outer sides of outer sealing part 7, the bending part 70 of the outer sealing part 7 is made of flexible material, and the inner skeleton 5 is fixed with the outer sealing part 7. The oil seal dustproof part 3 also has a second oil seal dustproof lip 32, and the second oil seal dustproof lip 32 is arranged on different sides of the inner skeleton 5. The inner skeleton 5 has a groove 50, and the outer sealing part 7 is partially embedded in the groove 50. The outer sealing part 7 has a dustproof lip 71, which is tightly pressed on the oil seal dustproof skeleton 2.

[0019] The first outer skeleton 6 is bent to form a stop part 60, which can strengthen the first outer skeleton 6 and stop the bearing 1.

[0020] The cross section of the oil seal dustproof skeleton 2 is U-shaped, which can also be similar shape, used to accommodate the oil seal dustproof part 3 and the reserved position of the extended lip.

[0021] The oil seal is annular as a whole, and when installed Figure 2 As shown, the inner ring of bearing 1 and oil seal dustproof skeleton 2 are interference fit and assembled on rotating shaft 101, outer sealing part 7 and second outer skeleton 9 are tightly attached to housing 100.

[0022] Working principle:

[0023] In use, one of the working scenarios is that the outer oil seal 7 is interference fit with the inner hole of the housing 100, the inner ring of the bearing 1 and the oil seal dustproof skeleton 2 are interference fit with the rotating shaft 101, when the rotating shaft 101 rotates, the inner ring of the bearing 1 and the oil seal dustproof skeleton 2 rotate with the rotating shaft 101, the outer ring of the bearing 1, the oil seal dustproof part 3, the inner skeleton 5 and the outer oil seal 7 are stationary;

[0024] When the rotating shaft 101 axially moves relative to the shell 100, the bearing 1, the oil sealing and dustproof framework 2, the oil sealing and dustproof part 3, the inner framework 5 and the inner side of the outer oil seal 7 axially move together with the rotating shaft 101, the outer side of the outer oil seal 7 is fixed, and the deformation occurs at the bending part 70 of the outer oil seal 7, so that even if the rotating shaft 101 moves, since the oil sealing and dustproof part 3 and the oil sealing and dustproof framework 2 axially move synchronously, the contact positions of the three sealing parts, the oil sealing lip 30, the first oil sealing and dustproof lip 31 and the second oil sealing and dustproof lip 32, and the oil sealing and dustproof framework 2 do not relatively slide, thereby ensuring the reliability of the oil seal and the dust seal.

[0025] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0026] Although the specific embodiments of the present application are described above, the present application is not limited to the above description. Those skilled in the art should understand that various modifications or changes can be made to the technical scheme of the present application without creative labor, and still fall within the protection scope of the present application.

Claims

1. An oil seal which allows rotation and axial movement, characterized by, The bearing (1), inner skeleton (5), oil seal dustproof part (3), clamping spring (4), oil seal dustproof skeleton (2), outer sealing part (7), first outer skeleton (6) and second outer skeleton (9), the outer ring of the bearing (1) is interference fit with the inner skeleton (5), the oil seal dustproof part (3) is fixedly connected with the inner skeleton (5), the oil seal dustproof part (3) has an oil seal lip (30) and a first oil seal dustproof lip (31), the oil seal dustproof part (3) is located in the accommodating groove formed by the oil seal dustproof skeleton (2) and cooperates with the oil seal dustproof skeleton (2), the clamping spring (4) is clamped on the oil seal dustproof part (3) so that the oil seal lip (30) is pressed on the oil seal dustproof skeleton (2), the first oil seal dustproof lip (31) is tightly pressed on the oil seal dustproof skeleton (2), the first outer skeleton (6) and the second outer skeleton (9) are wrapped on the inner and outer sides of the outer sealing part (7), the bending part (70) of the outer sealing part (7) is made of flexible material, and the inner skeleton (5) is fixedly connected with the outer sealing part (7).

2. A rotatable and axially movable oil seal as claimed in claim 1, characterized in that The oil seal dustproof part (3) further has a second oil seal dustproof lip (32), and the second oil seal dustproof lip (32) and the first oil seal dustproof lip (31) are arranged on different sides of the inner skeleton (5).

3. A rotatable and axially movable oil seal as claimed in claim 1, wherein, The inner skeleton (5) is provided with a groove (50), and the outer sealing part (7) is partially embedded in the groove (50).

4. The oil seal of claim 1 wherein, The outer sealing part (7) has a dustproof lip (71), and the dustproof lip (71) is tightly pressed on the oil seal dustproof skeleton (2).

5. A rotatable and axially movable oil seal as claimed in claim 1, wherein, The first outer skeleton (6) is bent to form a stop part (60).

6. A rotatable and axially movable oil seal as claimed in claim 1, wherein, The cross section of the oil seal dustproof skeleton (2) is U-shaped.

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