Multi-stage corrosion-resistant oil seal part

Abstract

The utility model discloses a multi-stage type corrosion-resistant oil seal piece which comprises a rotating shaft and an oil seal ring provided with a framework and a spring, and further comprises a lip arranged on the end face of the oil seal ring, an elastic plate is arranged in the oil seal ring, a movable channel is formed in the lip, and a branch plate in sliding fit with the movable channel is arranged on the elastic plate. According to the multi-stage type corrosion-resistant oil seal part, the lip can be actively attached to the side wall of the rotating shaft through the branch plate extending into the movable channel, and when the rotating shaft deviates in the radial direction and extrudes or is far away from the lip, the lip can be kept in adaptive contact with the rotating shaft through the branch plate, so that the oil seal ring is kept sealed, and the service life of the oil seal ring is prolonged. And the problem that sealing is affected due to permanent deformation of the oil seal ring is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seals, in particular to a multi-stage corrosion-resistant oil seal. Background Art

[0002] Oil seals used on rotating shafts are often equipped with a metal skeleton to increase the seal's pressure resistance, reduce stress and deformation damage, and cooperate with the lip to prevent dust.

[0003] According to the publication (announcement) number: CN104358880A, the publication (announcement) date: 2015-02-18, a rotary motion oil seal is disclosed, which is composed of an elastic sealing body, a support frame, a main sealing lip, a dust lip and a spring. The dust lip forms an annular sealing surface, and is provided with raised or recessed stripes or a plurality of raised or recessed pits on the annular sealing surface. These raised or recessed pits form longitudinal and transverse grooves on the annular sealing surface of the dust lip. At the same time, a PTFE lip sheet can be attached to the dust lip to reduce the friction coefficient. The present invention has the characteristics of good dustproof performance, reduced dry friction between the dust lip and the sealing shaft, improved dry wear resistance and wear resistance of the dust lip, and long service life.

[0004] In the prior art including the above-mentioned patent, the skeleton can radially offset the torque generated by the rotation of the shaft, reducing the possibility of oil seal failure. However, after the shaft is radially offset during the transmission process, the offset force will always exist and will still cause squeezing of the oil seal, causing uneven force on the skeleton in the oil seal and causing permanent deformation of the oil seal rubber, thereby affecting the sealing effect of the oil seal. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-stage corrosion-resistant oil seal, aiming to solve the above-mentioned problems.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A multi-stage corrosion-resistant oil seal comprises a rotating shaft and an oil seal ring provided with a skeleton and a spring, and further comprises a lip provided on the end surface of the oil seal ring, wherein the oil seal ring is provided with an elastic plate;

[0008] A movable channel is provided in the lip, and a branch plate which is slidably matched with the movable channel is provided on the elastic plate.

[0009] Preferably, the end of the elastic plate is provided with an end plate that contacts the frame.

[0010] Preferably, the elastic plate is further provided with an arc piece that contacts and cooperates with the spring.

[0011] Preferably, an inner channel is provided in communication with the movable channel, and the end portion of the branch plate in the deformed state is embedded in the inner channel.

[0012] Preferably, the arc piece in the deformed state moves synchronously with the branch plate.

[0013] In the above technical solution, the utility model provides a multi-stage corrosion-resistant oil seal with the following beneficial effects: the branch plate extending into the movable channel can actively fit the lip to the side wall of the rotating shaft, and when the rotating shaft is radially offset, squeezed or moved away from the lip, the branch plate can keep the lip adaptively resisting the rotating shaft, so that the oil seal ring remains sealed, avoiding the problem of permanent deformation of the oil seal ring affecting the sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the assembly of the rotating shaft and the oil seal ring provided in an embodiment of the present utility model;

[0016] Figure 2 A schematic side cross-sectional view of a rotating shaft and an oil seal ring provided in an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the side cross-sectional structure of the rotating shaft and oil seal ring provided in an embodiment of the utility model.

[0018] Description of reference numerals:

[0019] 1. Rotating shaft; 2. Oil seal ring; 20. Lip; 21. Frame; 22. Spring; 3. Elastic plate; 31. End plate; 32. Arc plate; 33. Branch plate; 331. Movable channel; 332. Inner channel. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-3 As shown, a multi-stage corrosion-resistant oil seal comprises a rotating shaft 1 and an oil seal ring 2 provided with a skeleton 21 and a spring 22, and further comprises a lip 20 provided on the end surface of the oil seal ring 2, and an elastic plate 3 is provided in the oil seal ring 2;

[0022] A movable channel 331 is defined in the lip 20 , and a branch plate 33 is provided on the elastic plate 3 to slide in cooperation with the movable channel 331 .

[0023] Specifically, the lip 20 is provided on the end surface of the oil seal ring 2 in contact with the outside, and the oil seal ring 2 is made of rubber material, which is a prior art and will not be described in detail here.

[0024] Furthermore, the elastic plate 3 is specifically an elastic metal plate, and the remaining components on the elastic plate 3 are all elastic metal plates. The branch plate 33 maintains deformation in the default state and can complete the work of continuing deformation and restoring deformation. The branch plate 33 is inserted into the movable channel 331, and there is a gap in the movable channel 331 for the branch plate 33 to move.

[0025] The branch plate 33 extending into the movable channel 331 can actively fit the lip 20 to the side wall of the rotating shaft 1. When the rotating shaft 1 is radially offset, squeezed or moved away from the lip 20, the branch plate 33 can keep the lip 20 adaptively resisting the rotating shaft 1, so that the oil seal ring 2 remains sealed, avoiding permanent deformation of the oil seal ring 2 that affects the sealing.

[0026] As an embodiment further provided by the present invention, an end plate 31 is provided at the end of the elastic plate 3 to abut against the frame 21 .

[0027] Specifically, the end plate 31 is arranged perpendicular to the elastic plate 3 , and the end plate 31 is embedded in the rubber inside the oil seal ring 2 , so that the skeleton 21 and the end plate 31 can transmit force to each other.

[0028] The force applied to the skeleton 21 can be transmitted to the elastic plate 3 via the end plate 31 , thereby increasing the force effect on the outer ring of the oil seal ring 2 and improving the pressure resistance.

[0029] As another embodiment further provided by the present invention, the elastic plate 3 is further provided with an arc piece 32 that contacts and cooperates with the spring 22 .

[0030] The arc piece 32 can transmit the force exerted on the spring 22 and transfer the force to the elastic plate 3, so that the elastic plate 3 can perform pressure resistance treatment on the inner and outer rings of the oil seal ring 2, further improving the installation and use efficiency of the oil seal ring 2.

[0031] As another embodiment further provided by the present invention, an inner channel 332 is provided in communication with the movable channel 331 , and the end of the branch plate 33 in the deformed state is embedded in the inner channel 332 .

[0032] Specifically, the inner channel 332 is located inside the lip 20 , that is, toward the inside of the transmission body.

[0033] By moving the lip 20 away from the side during the deviation of the rotating shaft 1, the lip 20 is flipped toward the inside of the transmission body, so that the angle between the lip 20 and the oil seal ring 2 (the end face in contact with the outside world) increases, and the contact surface between the lip 20 and the side wall of the rotating shaft 1 decreases. The branch plate 33 actively embeds into the inner channel 332, and causes the rubber of the lip 20 on one side of the inner channel 332 to bulge and deform, and the bulged and deformed rubber is adhered to the side wall of the rotating shaft 1, which is used to compensate for the problem of the reduced contact surface of the lip 20, thereby ensuring the sealing effect of the oil seal ring 2.

[0034] As another embodiment further provided by the present invention, the arc piece 32 in the deformed state moves synchronously with the branch plate 33 .

[0035] When the lip 20 on this side is offset by the rotating shaft 1, the arc piece 32 and the branch plate 33 are deformed, and the angle between them is reduced, so that the rubber of the oil seal ring 2 on the side of the spring 22 also increases the contact area with the side wall of the rotating shaft 1, thereby making the oil seal ring 2 have a good sealing effect under the condition of double-layer adaptive sealing.

[0036] Working principle: The branch plate 33 extending into the movable channel 331 can actively fit the lip 20 to the side wall of the rotating shaft 1, and when the rotating shaft 1 is radially offset, when it is squeezed or moved away from the lip 20, the branch plate 33 can make the lip 20 maintain adaptive resistance to the rotating shaft 1, so that the oil seal ring 2 remains sealed, and during the offset of the rotating shaft 1, it moves away from the lip 20 on that side, so that the lip 20 flips toward the inside of the transmission body, so that the angle between the lip 20 and the oil seal ring 2 increases, and the contact surface between the lip 20 and the side wall of the rotating shaft 1 decreases, and the branch plate 33 actively embeds into the inner channel 332, and causes the rubber of the lip 20 on one side of the inner channel 332 to bulge and deform, and causes the bulged and deformed rubber to fit the side wall of the rotating shaft 1, which is used to compensate for the problem of the reduced contact surface of the lip 20.

[0037] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-stage corrosion-resistant oil seal, comprising a rotating shaft (1) and an oil seal ring (2) provided with a skeleton (21) and a spring (22), characterized in that: It also includes a lip (20) provided on the end surface of the oil seal ring (2), wherein the oil seal ring (2) is provided with an elastic plate (3); A movable channel (331) is provided in the lip (20), and a branch plate (33) that is slidably matched with the movable channel (331) is provided on the elastic plate (3).

2. A multi-stage corrosion-resistant oil seal according to claim 1, characterized in that: An end plate (31) is provided at the end of the elastic plate (3) and contacts the frame (21).

3. The multi-stage corrosion-resistant oil seal according to claim 2, characterized in that: The elastic plate (3) is also provided with an arc piece (32) that contacts and cooperates with the spring (22).

4. A multi-stage corrosion-resistant oil seal according to claim 3, characterized in that: An inner channel (332) is provided in communication with the movable channel (331), and the end of the branch plate (33) in a deformed state is embedded in the inner channel (332).

5. The multi-stage corrosion-resistant oil seal according to claim 4, characterized in that: The arc piece (32) in the deformed state moves synchronously with the branch plate (33).

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