Reciprocating sealing ring oil seal for lifting seat

Abstract

The utility model discloses a reciprocating sealing ring oil seal for a lifting seat, which comprises a middle ring sealing layer fixedly connected to the upper surface of a middle ring framework, a lower ring framework movably connected to the lower surface of the middle ring sealing layer, a lower ring sealing layer fixedly connected to the lower surface of the lower ring framework, an upper ring sealing layer movably connected to the side inner wall of the middle ring sealing layer, and a lower ring sealing layer movably connected to the side inner wall of the upper ring sealing layer. The inner wall of the upper ring sealing layer is fixedly connected with an upper ring framework, the side inner wall of the upper ring framework is fixedly connected with a telescopic rod, the side inner wall of the upper ring framework is fixedly connected with a rebound spring, the ends, away from the side inner wall of the upper ring framework, of the telescopic rod and the rebound spring are fixedly connected with a supporting pad, and the side inner wall of the middle ring sealing layer is movably connected with a spring ring. By means of the device, it can be ensured that the sealing lip and the lower ring framework always keep tight contact through the elastic force of the spring, and the sealing effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing elements, in particular to a reciprocating sealing ring oil seal for a lifting seat. Background Art

[0002] An oil seal is a mechanical component used to seal oil. It isolates the parts that need lubrication in the transmission components from the output components to prevent the lubricating oil from leaking. Traditional oil seals are usually double-lip oil seals with self-tightening springs and skeletons. The skeleton inside a traditional oil seal sealing ring is usually steel with an L-shaped cross-section. Its structural strength is relatively low. When the skeleton is subjected to force, it is easy to undergo irreversible deformation, thereby affecting the sealing effect of the oil seal sealing ring. For example, a Chinese patent discloses "an oil seal sealing ring" with application number: "202223283423.8". It increases the structural strength of the skeleton by setting the inner ring and the outer ring to a bent shape, ensures that the skeleton can automatically reset after deformation, and ensures the sealing effect of the oil seal sealing ring. However, the device is a single-layer ring, and the overall structural strength may change in shape due to excessive external force, thereby affecting the sealing effect. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a reciprocating sealing ring oil seal for a lifting seat. By setting up an upper, middle and lower three-ring skeleton and setting a sealing layer on the contact surface of each ring, it is possible to prevent the leakage of lubricating oil or working medium and enhance the structural strength of the oil seal, which is beneficial to ensuring the stable operation of the seat. By setting a telescopic rod, a spring and a support pad inside the upper ring skeleton, the elastic force of the spring can ensure that the sealing lip and the lower ring skeleton always maintain close contact, which is beneficial to improving the sealing effect.

[0004] The utility model also provides a reciprocating sealing ring oil seal for a lifting seat as mentioned above, comprising: a middle ring skeleton, the upper surface of the middle ring skeleton is fixedly connected with a middle ring sealing layer, the lower surface of the middle ring sealing layer is movably connected with a lower ring skeleton, the lower surface of the lower ring skeleton is fixedly connected with the lower ring sealing layer, the side inner wall of the middle ring sealing layer is movably connected with an upper ring sealing layer, the inner wall of the upper ring sealing layer is fixedly connected with the upper ring skeleton, the side inner wall of the upper ring skeleton is fixedly connected with a telescopic rod, the side inner wall of the upper ring skeleton is fixedly connected with a rebound spring, the telescopic rod and the rebound spring are fixedly connected with a support pad at one end away from the side inner wall of the upper ring skeleton, and the side inner wall of the middle ring sealing layer is movably connected with a spring ring. Through the above device, the elastic force of the spring can ensure that the sealing lip and the lower ring skeleton always keep in close contact, which is beneficial to improving the sealing effect.

[0005] According to the reciprocating sealing ring oil seal for a lifting seat described in the utility model, a limiting groove is arranged on the side inner wall of the middle ring sealing layer, and the spring ring is located inside the limiting groove. The above device is helpful to prevent the spring ring from being displaced or falling off.

[0006] According to the reciprocating sealing ring oil seal for a lifting seat described in the utility model, the upper ring skeleton and the upper ring sealing layer are both located directly above the spring ring, and the middle ring skeleton is located outside the lower ring skeleton. The above device is beneficial to optimize the sealing structure.

[0007] According to the reciprocating sealing ring oil seal for a lifting seat described in the utility model, the telescopic rod is located at the center of the rebound spring, and the support pad covers the telescopic rod and the rebound spring. The above device is helpful to ensure a close connection with the middle ring sealing layer.

[0008] According to the reciprocating sealing ring oil seal for a lifting seat described in the utility model, the side of the support pad away from the telescopic rod and the rebound spring is in contact with the side inner wall of the middle ring sealing layer, and the inner ring surface of the middle ring sealing layer is provided with a sealing lip. The above device is beneficial to enhancing the sealing effect.

[0009] According to the reciprocating sealing ring oil seal for a lifting seat described in the utility model, the spring ring and the support pad are parallel to the sealing lip, and the sealing lip is in contact with the side inner wall of the lower ring frame. The above device is beneficial to cooperate with the spring ring 10 and the support pad 9 to maintain a stable sealing effect.

[0010] Beneficial Effects

[0011] 1. Compared with the prior art, the reciprocating sealing ring oil seal for the lifting seat can prevent the leakage of lubricating oil or working medium by setting up the upper, middle and lower three-ring skeletons and setting a sealing layer on the contact surface of each ring, and strengthen the structural strength of the oil seal, which is beneficial to ensure the stable operation of the seat.

[0012] Compared with the prior art, the reciprocating sealing ring oil seal for the lifting seat, by arranging a telescopic rod, a rebound spring and a support pad inside the upper ring frame, can ensure that the sealing lip and the lower ring frame always maintain close contact through the elastic force of the spring, which is beneficial to improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 It is a three-dimensional structural diagram of the reciprocating seal ring oil seal for the lifting seat of the utility model;

[0015] Figure 2 This is the internal structure diagram of the reciprocating seal ring oil seal for the lifting seat of the utility model;

[0016] Figure 3 It is a cross-sectional structural diagram of a reciprocating seal ring oil seal for a lift seat of the utility model;

[0017] Figure 4 The utility model is a reciprocating seal ring oil seal for lifting seats Figure 3 Enlarged view of point C in the middle.

[0018] Legend:

[0019] 1. Middle ring frame; 2. Lower ring frame; 3. Middle ring sealing layer; 4. Lower ring sealing layer; 5. Upper ring sealing layer; 6. Upper ring frame; 7. Telescopic rod; 8. Rebound spring; 9. Support pad; 10. Spring ring; 11. Sealing lip. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-4 The utility model embodiment is a reciprocating sealing ring oil seal for a lifting seat, which includes: a middle ring skeleton 1, which is one of the main supporting structures for the oil seal and provides fixation and support for the middle ring sealing layer 3. The upper surface of the middle ring skeleton 1 is fixedly connected with the middle ring sealing layer 3, which is used to ensure the sealing effect of the oil seal between the middle ring skeleton 1 and the lower ring skeleton 2 to prevent leakage of lubricating oil or working medium. The lower surface of the middle ring sealing layer 3 is movably connected with the lower ring skeleton 2, which is used as the bottom supporting structure of the oil seal and is connected with the middle ring skeleton 1 and the lower ring sealing layer 4. The middle ring skeleton 1 is located on the outside of the lower ring skeleton 2, and the lower surface of the lower ring skeleton 2 is fixedly connected with the lower ring sealing layer 4 to ensure the sealing performance of the inner ring surface of the oil seal.

[0022] The side inner wall of the middle ring sealing layer 3 is movably connected with the upper ring sealing layer 5, which is used for enhancing the sealing effect between the upper ring skeleton 6 and the contact surface together with the middle ring sealing layer 3. The inner wall of the upper ring sealing layer 5 is fixedly connected with the upper ring skeleton 6, which is used for the top supporting structure of the oil seal. The side inner wall of the upper ring skeleton 6 is fixedly connected with the telescopic rod 7, which is used to prevent the support pad 9 from shaking. The side inner wall of the upper ring skeleton 6 is fixedly connected with a rebound spring 8, which is used to ensure the support stability of the support pad 9. The telescopic rod 7 is located at the center of the rebound spring 8, and the end of the telescopic rod 7 and the rebound spring 8 away from the side inner wall of the upper ring skeleton 6 is fixedly connected with the support pad 9 to enhance the sealing effect. The support pad 9 covers the telescopic rod 7 and the rebound spring 8.

[0023] The side of the support pad 9 away from the telescopic rod 7 and the rebound spring 8 is in contact with the side inner wall of the middle ring sealing layer 3. The side inner wall of the middle ring sealing layer 3 is movably connected with a spring ring 10 for tightening the sealing lip 11 to ensure the sealing effect. A limiting groove is provided on the side inner wall of the middle ring sealing layer 3 to prevent the spring ring 10 from falling off. The spring ring 10 is located inside the limiting groove. The upper ring skeleton 6 and the upper ring sealing layer 5 are both located directly above the spring ring 10. A sealing lip 11 is provided on the inner ring surface of the middle ring sealing layer 3 for working together with the spring ring 10 and the support pad 9 to ensure the sealing performance of the oil seal. The spring ring 10 and the support pad 9 are both parallel to the sealing lip 11, and the sealing lip 11 is in contact with the side inner wall of the lower ring skeleton 2.

[0024] Working principle: A sealing structure is formed by the middle ring skeleton 1, the middle ring sealing layer 3, the lower ring skeleton 2, the lower ring sealing layer 4, the upper ring sealing layer 5, and the upper ring skeleton 6. The multi-layer structure enhances the strength of the right side, wherein the spring ring 10 is located inside the side inner wall of the middle ring sealing layer 3, and cooperates with the limiting groove of the middle ring sealing layer 3 to ensure that it remains stable during movement. In addition, a rebound spring 8 and a telescopic rod 7 are arranged inside the upper ring skeleton 6 to support the support pad 9. The spring ring 10, the support pad 9 and the sealing lip 11 are all kept parallel. At the same time, the sealing lip 11 is tightly fitted with the side inner wall of the lower ring skeleton 2 to prevent leakage of lubricating oil or working medium. During the reciprocating motion of the lifting seat, due to the synergistic effect of the telescopic rod 7, the rebound spring 8, the support pad 9 and the spring ring 10, the sealing lip 11 can always maintain close contact with the lower ring skeleton 2, thereby ensuring the stability of the sealing effect.

[0025] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A reciprocating seal ring oil seal for a lifting seat, characterized in that: include: A middle ring skeleton (1), wherein the upper surface of the middle ring skeleton (1) is fixedly connected to a middle ring sealing layer (3), the lower surface of the middle ring sealing layer (3) is movably connected to a lower ring skeleton (2), the lower surface of the lower ring skeleton (2) is fixedly connected to a lower ring sealing layer (4), the side inner wall of the middle ring sealing layer (3) is movably connected to an upper ring sealing layer (5), the inner wall of the upper ring sealing layer (5) is fixedly connected to an upper ring skeleton (6), the side inner wall of the upper ring skeleton (6) is fixedly connected to a telescopic rod (7), the side inner wall of the upper ring skeleton (6) is fixedly connected to a rebound spring (8), the telescopic rod (7) and the rebound spring (8) are fixedly connected to a support pad (9) at one end away from the side inner wall of the upper ring skeleton (6), and the side inner wall of the middle ring sealing layer (3) is movably connected to a spring ring (10).

2. The reciprocating seal ring oil seal for a lift seat according to claim 1, characterized in that: A limiting groove is provided on the inner side wall of the middle ring sealing layer (3), and the spring ring (10) is located inside the limiting groove.

3. The reciprocating seal ring oil seal for a lift seat according to claim 1, characterized in that: The upper ring skeleton (6) and the upper ring sealing layer (5) are both located directly above the spring ring (10), and the middle ring skeleton (1) is located outside the lower ring skeleton (2).

4. The reciprocating seal ring oil seal for a lift seat according to claim 1, characterized in that: The telescopic rod (7) is located at the center of the rebound spring (8), and the support pad (9) covers the telescopic rod (7) and the rebound spring (8).

5. The reciprocating seal ring oil seal for a lift seat according to claim 1, characterized in that: A side of the support pad (9) away from the telescopic rod (7) and the rebound spring (8) is in contact with the inner wall of the middle ring sealing layer (3), and a sealing lip (11) is provided on the inner ring surface of the middle ring sealing layer (3).

6. A reciprocating seal ring oil seal for a liftable seat according to claim 5, characterized in that: The spring ring (10) and the support pad (9) are both parallel to the sealing lip (11), and the sealing lip (11) is in contact with the side inner wall of the lower ring frame (2).

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