CN209818738U - Sealing unit for telescopic end of electric push rod - Google Patents
Sealing unit for telescopic end of electric push rod Download PDFInfo
- Publication number
- CN209818738U CN209818738U CN201920464167.1U CN201920464167U CN209818738U CN 209818738 U CN209818738 U CN 209818738U CN 201920464167 U CN201920464167 U CN 201920464167U CN 209818738 U CN209818738 U CN 209818738U
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- sealing
- ring
- lip
- sealing ring
- inner tube
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Abstract
The utility model discloses a flexible end sealing unit of electric putter belongs to electric putter technical field, including the outer tube, the inner tube of establishing of each other cover, the one end of outer tube is provided with the end cover, be provided with the through-hole that is used for the inner tube to pass on the end cover, the through-hole includes that the one end that is close to the outer tube on the end cover extends the one end of keeping away from the outer tube and the aperture increases one by one through-hole portion one and through-hole portion two, through-hole portion one communicates with through-hole portion two and forms the ladder face in the junction, be provided with in the through-hole portion one and be used for first sealing washer and the second sealing washer sealed to inner tube. The utility model discloses a combined sealing piece seals between to inner tube and the end cover, can guarantee the sealed effect between inner tube and the end cover, prevents that the inside grease of outer tube from oozing in the middle of the gap to prevent that external dust from entering into the inside of outer tube, improve electric putter's use leakproofness.
Description
Technical Field
The utility model relates to an electric putter technical field especially relates to an electric putter flexible end seal unit.
Background
When the telescopic link is at the during operation, the inner tube needs carry out axial slip along the outer tube, need guarantee the leakproofness of telescopic link in order to guarantee the normal operating of telescopic link, prevents that dust impurity from entering into the inside of telescopic link, needs to seal the processing to the telescopic link. In order to guarantee the sealing performance between the end cover and the outer pipe, the end cover can be fixedly connected to one end of the outer pipe in a threaded connection mode, the threads are sealed in a mode of filling thread sealing glue, and the processing mode can guarantee good sealing performance.
In order to ensure the sealing performance between the inner pipe and the end cover, a sealing element is required to be arranged between the inner pipe and the end cover for sealing, the inner ring of the sealing element is in interference fit with the outer ring of the inner pipe, the outer ring of the sealing element is in interference fit with the inner wall of the end cover, the inner pipe and the end cover can be sealed, the tightness between the sealing element and the end cover and between the sealing element and the inner pipe are reflected by the interference magnitude of the sealing element and the inner pipe, the sealing degree of the telescopic rod is reflected, and the sealing performance of the.
At present, only a single oil seal is arranged between an inner pipe and an outer pipe of an electric push rod for sealing, although the inner pipe and the outer pipe can be sealed, the oil seal sealing piece is easy to age and wear after being used for a certain time, and the whole sealing performance of the electric push rod is affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem in the background art, and the sealed effectual flexible end seal unit of electric putter who provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a telescopic end sealing unit of an electric push rod comprises an outer pipe and an inner pipe which are sleeved with each other, wherein one end of the outer pipe is provided with an end cover, a through hole used for the inner pipe to pass is formed in the end cover, the through hole comprises a first through hole part and a second through hole part, the first through hole part and the second through hole part are communicated with each other and form a step surface at the joint, the first through hole part is internally provided with a first sealing ring and a second sealing ring which are used for sealing the inner pipe and the first through hole part, the first through hole part is provided with a blocking part used for blocking the first sealing ring and the second sealing ring from moving towards the outer pipe direction, the first sealing ring and the second sealing ring are sleeved outside the inner pipe, the end surfaces of the first sealing ring and the second sealing ring are mutually attached, and the step surface in the second through hole part is provided with a third sealing ring used for sealing the inner pipe and the second through hole part, be equipped with the fender lid that is used for blockking the third sealing washer on the end cover, first sealing washer, second sealing washer and third sealing washer all with inner tube interference fit, the second sealing washer is established between first sealing washer and third sealing washer, the second sealing washer is the dust ring, first sealing washer and third sealing washer are the oil blanket, the interference degree of second sealing washer and inner tube, the interference degree of third sealing washer and inner tube all are less than the interference degree of first sealing washer and inner tube.
Preferably, the method comprises the following steps: the inner ring of the first sealing ring is provided with a first sealing lip and a second sealing lip, and the interference degree of the first sealing lip and the inner pipe and the interference degree of the second sealing lip and the inner pipe are equal.
Preferably, the method comprises the following steps: the inner ring of the second sealing ring is provided with a third sealing lip close to the first sealing ring and a first dust lip far away from the first sealing ring, the interference degree of the third sealing lip and the inner tube is smaller than that of the first dust lip and the inner tube, and the interference degree of the first dust lip and the inner tube is smaller than that of the second dust lip and the inner tube.
Preferably, the method comprises the following steps: the inner ring of the third sealing ring is provided with a sealing lip four close to the second sealing ring and a dust lip two far away from the second sealing ring, and the interference degrees of the sealing lip four, the dust lip two and the inner pipe are all smaller than the interference degree of the sealing lip one and the inner pipe.
Preferably, the method comprises the following steps: the baffle cover is in threaded connection with the end cover, an external thread is arranged on the end cover, and an internal thread matched with the external thread is arranged on the baffle cover.
Preferably, the method comprises the following steps: the thickness of the third sealing ring is larger than the depth of the second through hole part.
Preferably, the method comprises the following steps: the outer side of the first dust lip is a conical surface, and one side, close to the first dust lip, of the fourth sealing lip is provided with a cutting and trimming surface matched with the conical surface.
Preferably, the method comprises the following steps: the end face, close to the first sealing ring, of the second sealing ring is provided with a groove, and the end face, close to the second sealing ring, of the first sealing ring is provided with a connecting ring used for being inserted into the groove.
Preferably, the method comprises the following steps: the blocking part is an annular bulge.
Preferably, the method comprises the following steps: the outer pipe is in threaded connection with the end cover.
Compared with the prior art, the utility model has the advantages of:
when the electric push rod stretches, the inner pipe needs to reciprocate relative to the outer pipe, and a sealing element needs to be arranged between the outer pipe and the inner pipe for sealing in order to seal the outer pipe and the inner pipe; the end cover is connected to one end of the outer pipe, the outer pipe and the end cover can be connected in a threaded connection mode, and sealant is filled in the connection position for sealing, so that the sealing performance between the outer pipe and the end cover can be kept; through being provided with first sealing washer, second sealing washer, the sealing member of third sealing washer intercombination formula between end cover and inner tube and sealing up between inner tube and the end cover, can guarantee the sealed effect between inner tube and the end cover, prevent that the inside grease of outer tube from oozing in the middle of the gap to prevent that external dust from entering into the inside of outer tube, influence electric putter's performance.
The second sealing ring is a dustproof ring, the first sealing ring and the third sealing ring are oil seals, a mode that two oil seals and one dustproof ring are clamped mutually is adopted, the interference degree of the first sealing ring and the inner pipe is larger than the interference degree of the second sealing ring and the inner pipe, and the interference degree of the third sealing ring and the inner pipe Impurity moisture between the inner tubes is further blocked.
Drawings
Fig. 1 is a schematic structural diagram of a sealing unit for a telescopic end of an electric putter of the present invention.
Fig. 2 is a schematic structural diagram of a sealing unit for a telescopic end of an electric putter of the present invention.
Fig. 3 is a schematic structural diagram of the first sealing ring, the second sealing ring and the third sealing ring of the present invention.
Fig. 4 is a schematic structural view of the electric putter of the present invention.
In the figure: 1. an outer tube; 2. an inner tube; 3. an end cap; 4. a through hole; 5. a first through hole part; 6. a second through hole part; 7. a blocking portion; 8. a step surface; 9. a first seal ring; 10. a second seal ring; 11. a third seal ring; 12. a blocking cover; 13. a first sealing lip; 14. a second sealing lip; 15. a third sealing lip; 16. a first dust lip; 17. a fourth sealing lip; 18. a second dust lip; 19. a trench; 20. and (7) connecting rings.
Detailed Description
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-4, an electric push rod telescopic end sealing unit comprises an outer tube 1 and an inner tube 2 which are sleeved with each other, one end of the outer tube 1 is provided with an end cover 3, the end cover 3 is provided with a through hole 4 for the inner tube 2 to pass through, the through hole 4 comprises a first through hole part 5 and a second through hole part 6 which extend from one end of the end cover 3 close to the outer tube 1 to one end far from the outer tube 1 and increase the caliber one by one, the first through hole part 5 is communicated with the second through hole part 6 and form a step surface 8 at the joint, the first through hole part 5 is internally provided with a first sealing ring 9 and a second sealing ring 10 which are used for sealing the inner tube 2 and the first through hole part 5, the first through hole part 5 is provided with a blocking part 7 which is used for blocking the first sealing ring 9 and the second sealing ring 10 from moving towards the outer tube 1, the first sealing ring 9 and the second sealing ring 10 are both sleeved, the 8 departments of the ladder face in through-hole portion two 6 are equipped with and are used for the third sealing washer 11 sealed to inner tube 2 and through-hole portion two 6, be equipped with on the end cover 3 and be used for blockking off the fender lid 12 of third sealing washer 11, first sealing washer 9, second sealing washer 10 and third sealing washer 11 all with inner tube 2 interference fit, second sealing washer 10 is established between first sealing washer 9 and third sealing washer 11, second sealing washer 10 is the dust ring, first sealing washer 9 and third sealing washer 11 are the oil blanket, the interference degree of second sealing washer 10 and inner tube 2, the interference degree of third sealing washer 11 and inner tube 2 all is less than the interference degree of first sealing washer 9 and inner tube 2.
By adopting the technical scheme, when the electric push rod stretches, the inner tube 2 needs to reciprocate relative to the outer tube 1, and in order to seal the outer tube 1 and the inner tube 2, a sealing element needs to be arranged between the outer tube 1 and the inner tube 2 for sealing; the end cover 3 is connected to one end of the outer tube 1, the outer tube 1 and the end cover can be connected in a threaded connection mode, and sealant is filled in the connection position for sealing, so that the sealing performance between the outer tube 1 and the end cover 3 can be kept; through being provided with first sealing washer 9, second sealing washer 10, the sealing member of the mutual combination formula of third sealing washer 11 between end cover 3 and inner tube 2 to seal between inner tube 2 and the end cover 3, can guarantee the sealed effect between inner tube 2 and the end cover 3, prevent that the inside grease of outer tube 1 from oozing from the gap in the middle of to prevent that external dust from entering into the inside of outer tube 1, influence electric putter's performance.
The blocking part 7 is an annular bulge and can block the first sealing ring 9 and the second sealing ring 10 to limit, so that the first sealing ring 9 and the second sealing ring 10 can be assembled conveniently. The second sealing ring 10 is a dustproof ring, the first sealing ring 9 and the third sealing ring 11 are oil seals, a form that the two oil seals and the dustproof ring are clamped mutually is adopted, the interference degree between the first sealing ring 9 and the inner pipe 2 is larger than the interference degree between the second sealing ring 10 and the inner pipe 2, and the interference degree between the third sealing ring 11 and the inner pipe 2, different protection effects can be achieved due to different interference degree matching between the first sealing ring 9, the second sealing ring 10 and the third sealing ring 11 and the inner pipe 2, the second sealing ring 10 is a dustproof ring, external dust can be prevented from being mixed between the outer pipe 1 and the inner pipe 2 which do reciprocating motion, the third sealing ring 11 can preliminarily remove dust impurities and moisture entering between the outer pipe 1 and the inner pipe 2, the surface of the second sealing ring 10 is prevented from being damaged by the dust impurities, the first sealing ring 9 and the inner pipe 2 are attached most tightly, on one hand, grease between the outer pipe 1 and the inner pipe 2 can be, on the other hand, the device can further obstruct impurity moisture entering between the outer pipe 1 and the inner pipe 2.
In another embodiment, the inner ring of the first seal ring 9 is provided with a first seal lip 13 and a second seal lip 14, and the interference degree of the first seal lip 13 and the interference degree of the second seal lip 14 and the inner pipe 2 are equal.
Through adopting above-mentioned technical scheme, set up seal lip one 13 and seal lip two 14 simultaneously on first sealing washer 9's inner circle, can play dual sealing effect, and the slope orientation of seal lip one 13 and seal lip two 14 is different, can seal outer tube 1, inner tube 2 two-way motion, has increased the sealed effect between them.
In another embodiment, the inner ring of the second seal ring 10 is provided with a third seal lip 15 close to the first seal ring 9 and a first dust lip 16 far from the first seal ring 9, the interference degree of the third seal lip 15 with the inner tube 2 is smaller than the interference degree of the first dust lip 16 with the inner tube 2, and the interference degree of the first dust lip 16 with the inner tube 2 is smaller than the interference degree of the second seal lip 14 with the inner tube 2.
Through adopting above-mentioned technical scheme, because the interference degree between seal lip three 15, dust lip one 16 and the inner tube 2 is less relatively, can reduce the friction of inner tube 2 and second sealing washer 10 on guaranteeing its dust seal's basis nature, reduce the friction loss.
In another embodiment, the inner ring of the third seal ring 11 is provided with a fourth seal lip 17 close to the second seal ring 10 and a second dust lip 18 far from the second seal ring 10, and the interference degrees of the fourth seal lip 17 and the second dust lip 18 with the inner pipe 2 are all smaller than the interference degrees of the first seal lip 13 with the inner pipe 2.
Through adopting above-mentioned technical scheme, the interference degree of four 17, two 18 and the inner tube of seal lips all is less than the interference degree of one 13 and inner tube 2 of seal lips, and the interference degree between third sealing washer 11 and the inner tube 2 is less relatively, can play the prevention dust sealing effect between inner tube 2 and the outer tube 1, reduces the friction of inner tube 2 and second sealing washer 10, reduces the friction loss.
In another embodiment, the blocking cover 12 is screwed on the end cover 3, the end cover 3 is provided with an external thread, and the blocking cover 12 is provided with an internal thread matched with the external thread.
Through adopting above-mentioned technical scheme, threaded connection between shield 12 and the end cover 3 can turn into axial removal with axial screw thread rotation to adjust the position of shield 12 and block first sealing washer 9, second sealing washer 10 and third sealing washer 11 and compress tightly.
In another embodiment, the thickness of the third seal 11 is greater than the depth of the second through hole portion 6.
Through adopting above-mentioned technical scheme, because the thickness of third sealing washer 11 is greater than the degree of depth of through-hole portion two 6, third sealing washer 11 has good elasticity, and the accessible is screwed up fender lid 12 to the end cover 3 screw thread and is made third sealing washer 11 to produce certain pressure on fender lid 12, plays the locking effect between the screw thread.
In another embodiment, the outer side of the first dust lip 16 is a tapered surface, and the side of the fourth sealing lip 17 close to the first dust lip 16 is provided with a cut-off surface matched with the tapered surface.
Through adopting above-mentioned technical scheme, set up conical inclined plane through the junction at 16 at dust lip and four 17 of seal lip, when assembling one 16 to dust lip, four 17 of seal lip, can play the effect of location, and when having certain extrusion between 16 at dust lip, four 17 of seal lip can produce micro extrusion deformation for it is more stable, inseparable between two sealing members.
In another embodiment, a groove 19 is provided on the end surface of the second seal ring 10 close to the first seal ring 9, and a connection ring 20 for inserting into the groove 19 is provided on the end surface of the first seal ring 9 close to the second seal ring 10.
Through adopting above-mentioned technical scheme, through set up slot 19 on second sealing washer 10, during the assembly, can insert in the middle of slot 19 with go-between 20 for first sealing washer 9, second sealing washer 10 have better stability between them, make both form an overall structure, increase the inseparable type and the stability of connecting between the sealing member.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a flexible end seal unit of electric putter which characterized in that: the inner pipe comprises an outer pipe and an inner pipe which are sleeved with each other, an end cover is arranged at one end of the outer pipe, a through hole used for the inner pipe to pass through is arranged on the end cover, the through hole comprises a first through hole part and a second through hole part, the first through hole part and the second through hole part are communicated from one end, close to the outer pipe, of the end cover to one end far away from the outer pipe, the caliber of the first through hole part and the caliber of the second through hole part are increased one by one, a step surface is formed at the joint of the first through hole part and the second through hole part, a first sealing ring and a second sealing ring which are used for sealing the inner pipe and the first through hole part are arranged in the first through hole part, a blocking part used for blocking the first sealing ring and the second sealing ring from moving towards the outer pipe is arranged on the first through hole part, the first sealing ring and the second sealing ring are all, be equipped with the fender lid that is used for blockking the third sealing washer on the end cover, first sealing washer, second sealing washer and third sealing washer all with inner tube interference fit, the second sealing washer is established between first sealing washer and third sealing washer, the second sealing washer is the dust ring, first sealing washer and third sealing washer are the oil blanket, the interference degree of second sealing washer and inner tube, the interference degree of third sealing washer and inner tube all are less than the interference degree of first sealing washer and inner tube.
2. The electric putter telescopic end sealing unit of claim 1 wherein: the inner ring of the first sealing ring is provided with a first sealing lip and a second sealing lip, and the interference degree of the first sealing lip and the inner pipe and the interference degree of the second sealing lip and the inner pipe are equal.
3. The electric putter telescopic end sealing unit of claim 2 wherein: the inner ring of the second sealing ring is provided with a third sealing lip close to the first sealing ring and a first dust lip far away from the first sealing ring, the interference degree of the third sealing lip and the inner tube is smaller than that of the first dust lip and the inner tube, and the interference degree of the first dust lip and the inner tube is smaller than that of the second dust lip and the inner tube.
4. The electric putter telescopic end sealing unit of claim 3 wherein: the inner ring of the third sealing ring is provided with a sealing lip four close to the second sealing ring and a dust lip two far away from the second sealing ring, and the interference degrees of the sealing lip four, the dust lip two and the inner pipe are all smaller than the interference degree of the sealing lip one and the inner pipe.
5. The electric putter telescopic end sealing unit of claim 1 wherein: the baffle cover is in threaded connection with the end cover, an external thread is arranged on the end cover, and an internal thread matched with the external thread is arranged on the baffle cover.
6. The electric putter telescopic end sealing unit of claim 1 wherein: the thickness of the third sealing ring is larger than the depth of the second through hole part.
7. The electric putter telescopic end sealing unit of claim 4 wherein: the outer side of the first dust lip is a conical surface, and one side, close to the first dust lip, of the fourth sealing lip is provided with a cutting and trimming surface matched with the conical surface.
8. The electric putter telescopic end sealing unit of claim 1 wherein: the end face, close to the first sealing ring, of the second sealing ring is provided with a groove, and the end face, close to the second sealing ring, of the first sealing ring is provided with a connecting ring used for being inserted into the groove.
9. The electric putter telescopic end sealing unit of claim 1 wherein: the blocking part is an annular bulge.
10. The electric putter telescopic end sealing unit of claim 1 wherein: the outer pipe is in threaded connection with the end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920464167.1U CN209818738U (en) | 2019-04-08 | 2019-04-08 | Sealing unit for telescopic end of electric push rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920464167.1U CN209818738U (en) | 2019-04-08 | 2019-04-08 | Sealing unit for telescopic end of electric push rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818738U true CN209818738U (en) | 2019-12-20 |
Family
ID=68878940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920464167.1U Expired - Fee Related CN209818738U (en) | 2019-04-08 | 2019-04-08 | Sealing unit for telescopic end of electric push rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209818738U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022037270A1 (en) * | 2020-08-19 | 2022-02-24 | 宁波帕瓦莱斯智能科技有限公司 | Waterproof structure for electric push rod |
-
2019
- 2019-04-08 CN CN201920464167.1U patent/CN209818738U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022037270A1 (en) * | 2020-08-19 | 2022-02-24 | 宁波帕瓦莱斯智能科技有限公司 | Waterproof structure for electric push rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 |