Oil seal structure with slotted sealing lip
By designing functional grooves and vulcanized rubber body sealing lips in the oil seal structure, combined with the tightening spring and angle design, the existing oil seals have been solved, and cost savings and overflow prevention effects are achieved.
Patent Information
- Application Number
- CN202420630258.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The oil seal on existing shock absorbers has shortcomings in dust protection and sealing, and the dustproof lip glue is wasted and the seal is not strict, resulting in oil overflow.
Design an oil seal structure with slotted sealing lip, including a rubber sealing lip with a functional groove and vulcanization on the dustproof lip, improve sealing performance using functional grooves and hoop springs, and prevent oil from overflowing through an angle design. .
Save glue materials, reduce costs, and effectively prevent oil from overflowing through functional slots and angle design, improving dust resistance.
Smart Images
Figure CN222163565U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an oil seal structure, in particular to an oil seal structure with a grooved sealing lip. Background Art
[0002] The existing oil seal installed on the shock absorber is as follows Figure 4 As shown in the figure, this type of oil seal generally has two parts for sealing. Figure 4 Part A is the dust lip, and its main function is to prevent external dust and other impurities from entering the shock absorber; Part B is the sealing lip, and its main function is to prevent the oil inside the shock absorber from overflowing.
[0003] In actual production or use, it is found that the above oil seals have the following disadvantages: (1) there is too much rubber at the dust lip, which wastes raw materials and has high costs; (2) the sealing lip is not tightly sealed, and oil always overflows during the repeated movement of the shock absorber push rod.
[0004] Based on the above shortcomings, it is necessary to improve the existing shock absorber oil seal. Utility Model Content
[0005] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides an oil seal structure with a grooved sealing lip to improve the dustproof performance of the oil seal structure.
[0006] Technical solution: To achieve the above-mentioned purpose, the utility model discloses an oil seal structure with a grooved sealing lip, comprising at least one dustproof lip and at least one sealing lip; at least one circle of functional grooves is arranged on the dustproof lip, and the side where the dustproof lip contacts the sealed component is defined as the inner side, and the functional groove is provided with an opening connected to the functional groove toward the inner side, and foreign matter can enter the functional groove through the opening.
[0007] Further, the axial direction of the component to be sealed is defined as the main direction, and the functional groove separates the dust lip into at least two lip petals.
[0008] Further, the non-sealing side of the oil seal is defined as the upper side, the sealing side of the oil seal is defined as the lower side, the angle between the upper surface of the lip and the upper side in the main direction is defined as the first angle, and the angle between the lower surface of the lip and the lower side in the main direction is defined as the second angle, and the first angle is greater than the second angle.
[0009] Furthermore, a plurality of the functional slots may be arranged in an array along the main direction.
[0010] Further, the non-sealing side of the oil seal is defined as the upper side, the sealing side of the oil seal is defined as the lower side, the axial direction of the component to be sealed is defined as the main direction, the dust lip extends to the upper side of the main direction, and the sealing lip extends to the lower side of the main direction.
[0011] Furthermore, the sealing lip is provided with at least one lip opening.
[0012] Furthermore, the dust lip and the sealing lip are vulcanized into one rubber body.
[0013] Furthermore, a circle of tightening spring is respectively arranged around the dustproof lip and around the sealing lip.
[0014] Furthermore, the rubber body has a built-in supporting skeleton.
[0015] The utility model has the following beneficial effects:
[0016] (1) The device adds a functional groove at the dust lip. The design of the functional groove can save the rubber raw materials of the entire oil seal structure, thereby reducing costs.
[0017] (2) The oil or other medium overflowing from the shock absorber adheres to the push rod of the shock absorber. As the push rod moves, the oil or medium will be scraped into the functional groove by the lip. At the same time, since the first angle is greater than the second angle, the pressure on the upper side of the lip is greater than the pressure on the lower side of the lip, and the oil or medium will flow to the sealing side (i.e., the inside of the shock absorber), forming a backflow to prevent the oil or other medium from overflowing. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the installation of the utility model;
[0019] Figure 2 It is a cross-sectional view of the utility model (the cross-sectional view of the device is bilaterally symmetrical, and this figure shows the left half structure of the cross-sectional view);
[0020] Figure 3 for Figure 2 A magnified view of the structure at center Ι;
[0021] Figure 4 It is a schematic diagram of the existing oil seal structure mentioned in the background technology.
[0022] In the figure, 1. dustproof lip; 2. sealing lip; 4. functional groove; 5. part to be sealed; 6. opening; 7. lip; 8. first angle; 9. second angle; 10. lip; 11. rubber body; 12. tightening spring; 13. supporting frame; 14. outer cylinder; 15. push rod. DETAILED DESCRIPTION
[0023] The following is combined with Figure 1 To Attachment Figure 4 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention.
[0024] An oil seal structure with a grooved sealing lip comprises a dust lip 1 and a sealing lip 2, wherein the dust lip 1 and the sealing lip 2 are formed into an integrated rubber body 11 by vulcanization or other processes. For the convenience of description, the following terms are defined: "Oil seal non-sealing side" refers to the external environment of the sealed component 5, as shown in the attached manual. Figure 1 C in the middle; "Oil seal sealing side" refers to the internal environment of the sealed component 5, as shown in the attached manual. Figure 1 D in the figure; “upper side” is the part of the instruction manual Figure 1 The X direction in the figure is the non-sealing side of the oil seal; the “lower side” is the side indicated in the instruction manual. Figure 1 The Y direction in the figure is the sealing side of the oil seal; the main direction is the axial direction of the component 5 to be sealed; the side where the dust lip 1 contacts the component 5 to be sealed is defined as the inner side. The dust lip 1 extends to the upper side of the main direction (i.e. the X direction), and the sealing lip 2 extends to the lower side of the main direction (i.e. the Y direction). The component 5 to be sealed is composed of an outer cylinder 14 and a push rod 15. The inner sides of the dust lip 1 and the sealing lip 2 abut against the push rod 15. Two lip openings 10 are provided on the sealing lip 2. A circle of tightening springs 12 are respectively provided around the dust lip 1 and around the sealing lip 2, and the tightening springs 12 can hold the dust lip 1 and the sealing lip 2 tightly on the push rod 15. The rubber body 11 has a built-in support skeleton 13.
[0025] The dust lip 1 is provided with at least one or more functional grooves 4. In this embodiment, there are two functional grooves 4 in total, and the plurality of functional grooves 4 are arranged in an array along the main direction. An opening 6 communicating with the functional groove 4 is provided on the inner side of the dust lip 1, and foreign matter can enter the functional groove 4 through the opening 6. Each functional groove 4 can divide the dust lip 1 into two lip petals 7, and two functional grooves 4 can divide the dust lip 1 into three lip petals 7. The design of the functional groove 4 can reduce the material used in the rubber body 11, thereby reducing the production cost.
[0026] The non-sealing side of the oil seal is defined as the upper side, the sealing side of the oil seal is defined as the lower side, the angle between the upper surface of the lip 7 and the upper side in the main direction is defined as the first angle 8, and the angle between the lower surface of the lip 7 and the lower side in the main direction is defined as the second angle 9, and the first angle 8 is greater than the second angle 9. Since the first angle 8 is greater than the second angle 9, the pressure on the upper side of the lip 7 is greater than the pressure on the lower side of the lip 7, and the oil or medium will flow to the sealing side (i.e., inside the shock absorber), forming a backflow to prevent the oil or other medium from overflowing.
[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. An oil seal structure with a grooved sealing lip, characterized in that: The invention comprises at least one dustproof lip (1) and at least one sealing lip (2); at least one circle of functional grooves (4) are arranged on the dustproof lip (1), and the side of the dustproof lip (1) in contact with the sealed component (5) is defined as the inner side; the functional groove (4) is provided with an opening (6) connected to the functional groove (4) toward the inner side, and foreign matter can enter the functional groove (4) through the opening (6).
2. The oil seal structure with a grooved sealing lip according to claim 1, characterized in that: The axial direction of the sealed component (5) is defined as the main direction, and the functional groove (4) separates the dust lip (1) into at least two lip petals (7).
3. The oil seal structure with a grooved sealing lip according to claim 2, characterized in that: The non-sealing side of the oil seal is defined as the upper side, the sealing side of the oil seal is defined as the lower side, the angle between the upper surface of the lip (7) and the upper side in the main direction is defined as the first angle (8), and the angle between the lower surface of the lip (7) and the lower side in the main direction is defined as the second angle (9), and the first angle (8) is greater than the second angle (9).
4. The oil seal structure with a grooved sealing lip according to claim 2, characterized in that: A plurality of the functional slots (4) may be arranged in an array along the main direction.
5. The oil seal structure with a grooved sealing lip according to claim 1, characterized in that: The non-sealing side of the oil seal is defined as the upper side, the sealing side of the oil seal is defined as the lower side, the axial direction of the sealed component (5) is defined as the main direction, the dust lip (1) extends to the upper side of the main direction, and the sealing lip (2) extends to the lower side of the main direction.
6. The oil seal structure with a grooved sealing lip according to claim 5, characterized in that: The sealing lip (2) is provided with at least one lip opening (10).
7. The oil seal structure with a grooved sealing lip according to claim 6, characterized in that: The dustproof lip (1) and the sealing lip (2) are a vulcanized rubber body (11) formed as one body.
8. The oil seal structure with a grooved sealing lip according to claim 7, characterized in that: A circle of tightening spring (12) is respectively arranged around the dustproof lip (1) and around the sealing lip (2).
9. The oil seal structure with a grooved sealing lip according to claim 7, characterized in that: The rubber body (11) has a built-in supporting skeleton (13).