Oil seal capable of realizing reciprocating and rotating

Abstract

The invention relates to an oil seal capable of realizing reciprocating and rotating, a bearing, an inner oil seal framework and an outer oil seal are connected through interference fit, a tightening spring tightens an oil sealing lip on a bottom framework, and the oil sealing lip, a first dustproof lip and a second dustproof lip are integrated different parts. And a first groove is formed between the first dustproof lip and the second dustproof lip. The position where the oil sealing lip is in contact with the bottom framework forms the oil sealing position, the oil sealing position is arranged in the oil seal, and even if the oil seal axially moves, the sealing performance of the oil seal cannot be affected or a finish machining part cannot be damaged. And the oil seal can also rotate along with the middle shaft.

Description

Technical Field

[0001] The present invention relates to an oil seal, in particular to an oil seal capable of realizing reciprocating and rotating operation. Background Art

[0002] The existing oil seal will inevitably move axially, and this movement will deviate from its original oil seal position. The oil seal position is mostly finely processed. When the oil seal is separated from the processing position, its sealing quality will be reduced, and even machine parts and fine processing positions will be damaged. The present invention provides an oil seal, which sets the oil seal position inside 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 fine processing position, thereby preventing damage to machine parts and fine processing positions, and the oil seal can also rotate with the central shaft. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes an oil seal that can realize reciprocating and rotating, as follows: It includes a bearing, an inner frame, an oil-sealing and dust-proof part, a tightening spring, an oil-sealing and dust-proof frame, an outer sealing part, a first outer frame and a second outer frame. The outer ring of the bearing is interference-fitted with the inner frame, the oil-sealing and dust-proof part is fixedly connected to the inner frame, the oil-sealing and dust-proof part is provided with an oil-sealing lip and a first oil-sealing and dust-proof lip, the oil-sealing and dust-proof part is located in a receiving groove formed by the oil-sealing and dust-proof frame and is matched with the oil-sealing and dust-proof frame, the tightening spring is tightened on the oil-sealing and dust-proof part so that the oil-sealing lip is pressed against the oil-sealing and dust-proof frame, the first oil-sealing and dust-proof lip is pressed against the oil-sealing and dust-proof frame, the first outer frame and the second outer frame are wrapped at the inner and outer sides of the outer sealing part, the bending part of the outer sealing part is made of flexible material, and the inner frame and the outer sealing part are fixedly connected. For example, the inner frame and the outer sealing part can be fixedly connected by interference fit, and the first outer frame provides support.

[0004] Since the bending part of the outer sealing part is made of flexible material, when axial movement occurs, the second outer frame on the left side of the bending part will be attached to the shell, and the right side will move as a whole. During movement, the oil sealing lip will still be tightly pressed against the oil sealing and dust-proof frame, and will not be displaced relative to the oil sealing and dust-proof frame, thereby ensuring the oil sealing effect.

[0005] During rotation, the bearing and the second exoskeleton will rotate along with the rotating shaft, while other parts will remain in place. Therefore, the various lips will not be displaced from their original working positions due to rotation.

[0006] Furthermore, the oil sealing and dust proof part is provided with a second oil sealing and dust proof lip, and the second oil sealing and dust proof lip and the first oil sealing and dust proof lip are arranged on different sides of the inner frame.

[0007] Preferably, the second exoskeleton is bent to form a planar positioning portion, which serves to strengthen the second exoskeleton and facilitate the positioning of the oil seal during installation.

[0008] Preferably, the inner frame is provided with a groove, and the outer sealing part is partially embedded in the groove, so that the inner frame and the outer sealing part are more closely matched, and the shear force between the two during axial movement can be overcome.

[0009] Furthermore, the outer sealing part is provided with a dustproof lip, which is tightly pressed against the oil sealing and dustproof frame. The oil sealing and dustproof lips arranged in multiple positions enhance the oil sealing and dustproof effects, and can greatly extend the service life of the oil seal.

[0010] Preferably, the first exoskeleton is bent to form a stopper, which can play a role in strengthening the first exoskeleton and the stopper bearing.

[0011] As mentioned above, the cross section of the oil sealing and dust preventing frame of the oil seal is U-shaped.

[0012] The present invention has the following advantages: 1. The oil seal is located inside the oil seal, and the oil seal is fixed by means of interlocking and interference fit, and the position of the oil seal is limited by strengthening the radial protrusion of the skeleton. Even if the oil seal moves axially, its sealing performance will not be affected because the oil seal is located inside the oil seal, which can effectively prevent damage to the machine parts or finishing positions; 2. The oil seal has a soft bending part, which allows the oil seal to move axially to a certain extent and facilitates the replacement of the oil seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cut-away side view (half) of the oil seal.

[0014] Figure 2 This is a schematic diagram (half) of the installation and use of the oil seal. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] like Figure 1As shown, the present invention provides a reciprocating and rotating oil seal, which includes a bearing 1, an inner frame 5, an oil-sealing and dust-proof part 3, a clamp spring 4, an oil-sealing and dust-proof frame 2, an outer sealing part 7, a first outer frame 6 and a second outer frame 9. The outer ring of the bearing 1 is interference-fitted with the inner frame 5, the oil-sealing and dust-proof part 3 is fixedly connected with the inner frame 5, the oil-sealing and dust-proof part 3 is provided with an oil-sealing lip 30 and a first oil-sealing and dust-proof lip 31, the oil-sealing and dust-proof part 3 is located in a receiving groove formed by the oil-sealing and dust-proof frame 2 and cooperates with the oil-sealing and dust-proof frame 2, the clamp spring 4 is clamped on the oil-sealing and dust-proof part 3 so that the oil-sealing lip 30 is pressed against the oil-sealing and dust-proof frame 2, the first oil-sealing and dust-proof lip 31 is pressed against the oil-sealing and dust-proof frame 2, the first outer frame 6 and the second outer frame 9 are wrapped at the inner and outer sides of the outer sealing part 7, the bending part 70 of the outer sealing part 7 is made of a flexible material, and the inner frame 5 is fixedly connected with the outer sealing part 7. The oil-sealing and dust-proof part 3 is also provided with a second oil-sealing and dust-proof lip 32, which is arranged on different sides of the inner frame 5 from the first oil-sealing and dust-proof lip 31. The second outer frame 9 is bent to form a flat positioning portion 90. The inner frame 5 is provided with a groove 50, and the outer sealing part 7 is partially embedded in the groove 50. The outer sealing part 7 is provided with a dust-proof lip 71, which is tightly pressed against the oil-sealing and dust-proof frame 2.

[0017] The first exoskeleton 6 is bent to form a stopper 60 , which can play a role in strengthening the first exoskeleton 6 and the stopper bearing 1 .

[0018] The cross section of the oil-sealing and dust-proof frame 2 is U-shaped, or may be a similar shape, for accommodating the reserved position of the oil-sealing and dust-proof portion 3 and the extended lip.

[0019] The oil seal is annular in shape. Figure 2 As shown, the inner ring of the bearing 1 and the oil-sealing and dust-proof skeleton 2 are interference-fitted onto the rotating shaft 101 , and the outer sealing portion 7 and the support through the second outer skeleton 9 are tightly fitted onto the housing 100 and positioned by the positioning portion 90 .

[0020] Working principle: When in use, one of the working scenarios is: 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-sealing and dust-proof 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-sealing and dust-proof skeleton 2 rotate together with the rotating shaft 101, and the outer ring of the bearing 1, the oil-sealing and dust-proof part 3, the inner skeleton 5, and the outer oil seal 7 do not move; When the rotating shaft 101 moves axially relative to the housing 100, the bearing 1, the oil sealing and dust proof skeleton 2, the oil sealing and dust proof part 3, the inner part of the inner skeleton 5 and the outer oil seal 7 move axially together with the rotating shaft 101, the outer part of the outer oil seal 7 does not move, and the deformation occurs at the bending part 70 of the outer oil seal 7. Therefore, even if the rotating shaft 101 moves, since the oil sealing and dust proof part 3 and the oil sealing and dust proof skeleton 2 move axially synchronously, the sealing positions therebetween: the contact positions between the oil sealing lip 30, the first oil sealing and dust proof lip 31 and the second oil sealing and dust proof lip 32 and the oil sealing and dust proof skeleton 2 will still not produce relative slippage, thereby ensuring the reliability of the oil seal and the dust seal.

[0021] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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.

[0022] Although the above describes the specific implementation methods of the present invention, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. An oil seal capable of reciprocating and rotating, characterized in that: The invention comprises a bearing (1), an inner frame (5), an oil-sealing and dust-proof part (3), a clamp spring (4), an oil-sealing and dust-proof frame (2), an outer sealing part (7), a first outer frame (6) and a second outer frame (9), wherein the outer ring of the bearing (1) is interference-fitted with the inner frame (5), the oil-sealing and dust-proof part (3) is fixedly connected with the inner frame (5), the oil-sealing and dust-proof part (3) is provided with an oil-sealing lip (30) and a first oil-sealing and dust-proof lip (31), and the oil-sealing and dust-proof part (3) is located in a receiving groove formed by the oil-sealing and dust-proof frame (2) and is connected to the oil-sealing and dust-proof frame (2). ), the tightening spring (4) is tightened on the oil sealing and dustproof part (3) so that the oil sealing lip (30) is pressed against the oil sealing and dustproof frame (2), the first oil sealing and dustproof lip (31) is pressed against the oil sealing and dustproof frame (2), the first outer frame (6) and the second outer frame (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, the inner frame (5) is fixedly connected to the outer sealing part (7), and the second outer frame (9) is bent to form a flat positioning part (90).

2. The oil seal according to claim 1, characterized in that: The oil sealing and dust proof portion (3) is further provided with a second oil sealing and dust proof lip (32), and the second oil sealing and dust proof lip (32) and the first oil sealing and dust proof lip (31) are arranged on different sides of the inner frame (5).

3. The oil seal according to claim 1, characterized in that: The inner frame (5) has an upper groove (50), and the outer sealing portion (7) is partially embedded in the groove (50).

4. The oil seal according to claim 1, characterized in that: The outer sealing portion (7) is provided with a dustproof lip (71), and the dustproof lip (71) is tightly pressed against the oil-sealing and dust-proof frame (2).

5. The oil seal according to claim 1, characterized in that: The first outer frame (6) is bent to form a stopper (60).

6. The oil seal according to claim 1, characterized in that: The cross-section of the oil-sealing and dust-proof frame (2) is U-shaped.

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