CN211525413U - Gas spring seal - Google Patents
Gas spring seal Download PDFInfo
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- CN211525413U CN211525413U CN201922263838.0U CN201922263838U CN211525413U CN 211525413 U CN211525413 U CN 211525413U CN 201922263838 U CN201922263838 U CN 201922263838U CN 211525413 U CN211525413 U CN 211525413U
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Abstract
The utility model discloses an air spring seal, which comprises a sealing body and a framework arranged in the sealing body; the sealing body comprises an outer connecting part, a middle bridging part and an inner lip part, wherein the outer connecting part is connected with the outer end part of the middle bridging part, and the inner lip part is connected with the inner end part of the middle bridging part; the inner end face of the inner lip portion is provided with at least one lip protruding inwards and suitable for embracing the shaft, the ratio of the vertical distance E between the inner end face and the outer end face of the inner lip portion to the distance F between the upper surface of the inner lip portion and the upper surface of the middle bridging portion in the axial direction is = 0.7-1.3, and the vertical distance E is larger than 1.5 mm. The utility model discloses can realize sealed guide effect well, can guarantee moreover that the sealed pneumatics of air spring cavity is at 300~1500N within ranges, avoids inert gas or oil-gas mixture's leakage.
Description
Technical Field
The utility model relates to an air spring seal.
Background
At present, the gas spring is an industrial accessory which can play a role in supporting, buffering, braking, height adjustment, angle adjustment and the like. The device comprises a pressure cylinder, a piston rod, a piston, a sealing guide sleeve, a filler (inert gas or oil-gas mixture), an in-cylinder control element, an out-cylinder control element (a controllable gas spring), a joint and the like. The principle is that inert gas or oil-gas mixture is filled in a closed pressure cylinder, the pressure in a cavity is several times or dozens of times higher than the atmospheric pressure, and the motion of a piston rod is realized by utilizing the pressure difference generated by the cross section area of the piston rod smaller than that of the piston. Because of the fundamental difference in principle, the gas spring has the obvious advantages of relatively slow speed, small dynamic force change (generally within 1: 1.2) and easy control compared with the common spring; the seal guide sleeve, i.e., the gas spring seal, is an important component of the gas spring, which is related to the service life and effectiveness of the gas spring.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect, provide an air spring seal, it can realize sealed guide effect well, can guarantee moreover that air spring cavity's sealed pneumatics is at 300~1500N within ranges, avoids inert gas or oil-gas mixture's leakage.
In order to solve the technical problem, the technical scheme of the utility model is that: a gas spring seal comprises a seal body and a framework arranged in the seal body; wherein the content of the first and second substances,
the sealing body comprises an outer connecting part, a middle bridging part and an inner lip part, the outer connecting part is connected with the outer end part of the middle bridging part, and the inner lip part is connected with the inner end part of the middle bridging part;
the inner end face of the inner lip portion is provided with at least one lip protruding inwards and suitable for embracing the shaft, the ratio of the vertical distance E between the inner end face and the outer end face of the inner lip portion to the distance F between the upper surface of the inner lip portion and the upper surface of the middle bridging portion in the axial direction is = 0.7-1.3, and the vertical distance E is larger than 1.5 mm.
Further, a concrete structure of skeleton is provided, the skeleton includes axial skeleton section and radial skeleton section, axial skeleton section with radial skeleton section connects the structure that forms the longitudinal section for the L type, axial skeleton section is located in the outer joint portion, radial skeleton section part is located in the well bridging portion, and at least part of radial skeleton section extends to in the lip.
Further, in order to improve the axial strength of the gas spring seal, the vertical distance J between the upper end face of the outer connecting portion and the upper end face of the axial skeleton section and/or the vertical distance K between the middle bridging portion and the lower end face of the radial skeleton section are smaller than 0.3 mm.
Further, the lip is including the main lip and the support lip that from top to bottom set gradually, main lip with be equipped with the oil film chamber between the support lip.
Further, the lip tip of the main lip and/or the support lip is of an arc-shaped structure in longitudinal section.
Further, in order to enable the air spring seal to have good abrasion resistance and hardness and guarantee sealing holding force and abrasion resistance for long-time use, the seal body is made of butadiene-acrylonitrile rubber with Shore hardness of 70-90 degrees.
Furthermore, the lip tip of the main lip and the fit interference magnitude of the shaft hole between the shafts are 0.5-1.5 mm.
Furthermore, the interference of the lip tip of the supporting lip and the fit of the shaft hole between the shafts is 0.3-1.0 mm.
Further, the front lip angle A of the main lip is larger than the rear lip angle B of the main lip, the front lip angle A ranges from 45 degrees to 80 degrees, and the rear lip angle B ranges from 10 degrees to 35 degrees.
And/or the anterior lip angle C of the support lip is greater than the posterior lip angle D of the support lip.
Furthermore, for the location stability, improve sealed effect, make inert gas or oil-gas mixture be difficult to leak, be equipped with an at least convex arc portion on the outer wall of outer joint portion.
After the technical scheme is adopted, the utility model discloses following beneficial effect has:
1. the utility model controls the ratio of the vertical distance E between the inner end surface and the outer end surface of the inner lip part (namely the thickness of the inner lip part) to the axial distance F between the upper surface of the inner lip part and the upper surface of the middle bridging part (namely the length of the inner lip part) between 0.7-1.3, and limits the vertical distance E to be more than 1.5 mm, thus the holding force of the inner lip part and the shaft can be well ensured, the sealing and guiding effect is well realized, the sealing air pressure of the air spring cavity is ensured to be within the range of 300-1500N, and the leakage of inert gas or oil-gas mixture is avoided;
2. the utility model is provided with at least one section of convex arc part on the outer diameter of the sealing body (the outer wall of the outer connecting part), and the arc part can ensure the stable positioning of the air spring seal and improve the density effect, so that the inert gas or the oil-gas mixture is not easy to leak;
3. the utility model has the advantages that the gas spring seal comprises a framework and a sealing body, adopts the design of a spring-free structure, has continuous and stable lip holding force, and can not reduce the holding force due to the fatigue of the spring after long-time use;
4. the supporting lip of the utility model plays an auxiliary sealing role for the main lip, and simultaneously can store an oil film between the supporting lip and the main lip, and plays a lubricating role for the main lip;
5. the utility model discloses a size through reasonable control J, K to make the skeleton terminal surface adopt thin seal body to cover, improved the axial strength of air spring oil blanket.
Drawings
Fig. 1 is a structural sectional view of the gas spring seal of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in fig. 1, a gas spring seal comprises a sealing body 1 and a skeleton 2 arranged in the sealing body 1; wherein the content of the first and second substances,
the sealing body 1 comprises an outer connecting part 11, a middle bridging part 12 and an inner lip part 13, wherein the outer connecting part 11 is connected with the outer end part of the middle bridging part 12, and the inner lip part 13 is connected with the inner end part of the middle bridging part 12;
the inner end face of the inner lip portion 13 is provided with at least one lip protruding inwards and adapted to embrace the shaft, the ratio of the vertical distance E between the inner end face and the outer end face of the inner lip portion 13 to the distance F in the axial direction between the upper surface of the inner lip portion 13 and the upper surface of the middle bridge portion 12 is = 0.7-1.3, and the vertical distance E is greater than 1.5 mm.
The ratio of the vertical distance E between the inner end surface and the outer end surface of the inner lip 13 (namely the thickness of the inner lip 13) to the distance F in the axial direction between the upper surface of the inner lip 13 and the upper surface of the middle bridging part 12 (namely the length of the inner lip) is controlled to be 0.7-1.3, and the vertical distance E is limited to be more than 1.5 mm, so that the holding force of the inner lip 13 and the shaft can be well ensured, the sealing and guiding effects are well realized, the sealing air pressure of the air spring cavity is ensured to be within the range of 300-1500N, and the leakage of inert gas or oil-gas mixture is avoided;
specifically, as shown in fig. 1, the skeleton 2 includes axial skeleton section 21 and radial skeleton section 22, axial skeleton section 21 with radial skeleton section 22 connects and forms the structure that the longitudinal section is the L type, axial skeleton section 21 locates in the outer joint portion 11, radial skeleton section 22 part is located in well bridging portion 12, and radial skeleton section 22 at least part extends to in the lip 13.
Specifically, as shown in fig. 1, a vertical distance J between an upper end surface of the outer connecting portion 11 and an upper end surface of the axial skeleton section 21 and a vertical distance K between the middle bridge portion 12 and a lower end surface of the radial skeleton section 22 are less than 0.3 mm.
Specifically, as shown in fig. 1, the lips include a main lip 31 and a support lip 32 that are sequentially arranged from top to bottom, and an oil film cavity is arranged between the main lip 31 and the support lip 32.
Specifically, as shown in fig. 1, the lip tips of the main lip 31 and the support lip 32 are arc-shaped in longitudinal section; in this embodiment, the arc radius R of the arc structure is 0.05-0.15 mm.
In order to enable the gas spring seal to have good wear resistance and hardness and guarantee sealing holding force and long-time use wear resistance, the sealing body 1 is made of butadiene-acrylonitrile rubber with Shore hardness of 70-90 degrees, but not limited to.
The interference of the lip tip of the main lip 31 and the fit of the shaft hole between the shafts is 0.5-1.5 mm.
The interference of the lip tip of the supporting lip 32 and the fit of the shaft hole between the shafts is 0.3-1.0 mm.
The front lip angle A of the main lip 31 is larger than the rear lip angle B of the main lip 31, the front lip angle A ranges from 45 degrees to 80 degrees, and the rear lip angle B ranges from 10 degrees to 35 degrees.
The anterior lip angle C of the support lip 32 is greater than the posterior lip angle D of the support lip 32.
The lip angle and the shaft hole matching interference are limited mainly to improve the holding force and the sealing effect.
Specifically, as shown in fig. 1, the outer wall of the outer connecting portion 11 is provided with at least one convex arc portion 11 a. This arc portion 11a can guarantee that the location of air spring seal is stable, improves its density effect for inert gas or oil gas mixture are difficult to leak more.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (10)
1. A gas spring seal is characterized by comprising a seal body (1) and a framework (2) arranged in the seal body (1); wherein the content of the first and second substances,
the sealing body (1) comprises an outer connecting part (11), a middle bridging part (12) and an inner lip part (13), wherein the outer connecting part (11) is connected with the outer end part of the middle bridging part (12), and the inner lip part (13) is connected with the inner end part of the middle bridging part (12);
the inner end face of the inner lip portion (13) is provided with at least one lip protruding inwards and suitable for holding a shaft, the ratio of the vertical distance E between the inner end face and the outer end face of the inner lip portion (13) to the distance F between the upper surface of the inner lip portion (13) and the upper surface of the middle bridge portion (12) in the axial direction is = 0.7-1.3, and the vertical distance E is larger than 1.5 mm.
2. A gas spring seal according to claim 1,
skeleton (2) are including axial skeleton section (21) and radial skeleton section (22), axial skeleton section (21) with radial skeleton section (22) are connected and are formed the structure of longitudinal section for the L type, axial skeleton section (21) are located in outer connecting portion (11), radial skeleton section (22) part is located in well bridging portion (12), and the at least part of radial skeleton section (22) extends to in interior lip (13).
3. A gas spring seal according to claim 2,
the vertical distance J between the upper end face of the outer connecting portion (11) and the upper end face of the axial skeleton section (21) and/or the vertical distance K between the middle bridging portion (12) and the lower end face of the radial skeleton section (22) are smaller than 0.3 mm.
4. A gas spring seal according to claim 1,
the lip is including main lip (31) and support lip (32) that from top to bottom set gradually, main lip (31) with be equipped with the oil film chamber between support lip (32).
5. A gas spring seal according to claim 4,
the main lip (31) and/or the lip tip of the support lip (32) are of an arc-shaped structure in longitudinal section.
6. A gas spring seal according to claim 1,
the sealing body (1) is made of butadiene-acrylonitrile rubber with Shore hardness of 70-90 degrees.
7. A gas spring seal according to claim 4,
the lip tip of the main lip (31) and the fit interference of the shaft hole between the shafts are 0.5-1.5 mm.
8. A gas spring seal according to claim 4,
the lip tip of the supporting lip (32) and the fit interference magnitude of the shaft hole between the shafts are 0.3-1.0 mm.
9. A gas spring seal according to claim 4,
the front lip angle A of the main lip (31) is larger than the rear lip angle B of the main lip (31), the front lip angle A ranges from 45 degrees to 80 degrees, the rear lip angle B ranges from 10 degrees to 35 degrees,
and/or the front lip angle C of the support lip (32) is greater than the rear lip angle D of the support lip (32).
10. A gas spring seal according to claim 1,
the outer wall of the outer connecting part (11) is provided with at least one convex arc-shaped part (11 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922263838.0U CN211525413U (en) | 2019-12-16 | 2019-12-16 | Gas spring seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922263838.0U CN211525413U (en) | 2019-12-16 | 2019-12-16 | Gas spring seal |
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| Publication Number | Publication Date |
|---|---|
| CN211525413U true CN211525413U (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922263838.0U Active CN211525413U (en) | 2019-12-16 | 2019-12-16 | Gas spring seal |
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| CN (1) | CN211525413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115289220A (en) * | 2022-08-18 | 2022-11-04 | 潍坊埃克特密封科技有限公司 | Pressure-adjustable pressure-resistant oil seal |
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2019
- 2019-12-16 CN CN201922263838.0U patent/CN211525413U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115289220A (en) * | 2022-08-18 | 2022-11-04 | 潍坊埃克特密封科技有限公司 | Pressure-adjustable pressure-resistant oil seal |
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