CN206830815U - A kind of piston seal of automobile Horizontal hydraulic jack - Google Patents
A kind of piston seal of automobile Horizontal hydraulic jack Download PDFInfo
- Publication number
- CN206830815U CN206830815U CN201720610677.6U CN201720610677U CN206830815U CN 206830815 U CN206830815 U CN 206830815U CN 201720610677 U CN201720610677 U CN 201720610677U CN 206830815 U CN206830815 U CN 206830815U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- ring
- shaped sealing
- sealing ring
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
- Actuator (AREA)
Abstract
The utility model discloses a kind of piston seal of automobile Horizontal hydraulic jack, including U-shaped sealing ring and back-up ring.Jack forms the piston rod step of the diameter greater diameter than piston bar body in one end of piston bar body, space is maintained between piston rod step and the inwall of cylinder barrel, extend to form piston rod packing seat of the diameter less than the diameter of piston rod step along the other end of piston rod step, U-shaped sealing ring is set on piston rod packing seat, the end of cylinder barrel is provided with stopper slot, the outer edge of one end of back-up ring forms a ladder structure of right angle, the inside edge of the oblique girdle plane of ladder structure of right angle and one end of back-up ring forms an obtuse angle, lip the first cavity of direction and lip of U-shaped sealing ring are height bead structure, the shape of the other end of U-shaped sealing ring is adapted with the inside edge of one end of back-up ring and the shape of oblique girdle plane.Seal of the present utility model can bear high pressure and prevent unbalance loading, and can avoid seal by being chewed during stopper slot.
Description
Technical field
The utility model belongs to hydraulic packing technical field, more particularly to a kind of piston of automobile Horizontal hydraulic jack is close
Sealing.
Background technology
With the popularization of domestic sedan car, the use with car jack as auto parts machinery is also more and more.Hydraulic pressure thousand
Jin top is a kind of using the liquid being sealed in oil cylinder as medium, hydraulic energy is converted to mechanical energy, so as to which weight be pushed up upwards
The jack risen.Hydraulic jack is simple in construction, small volume, in light weight, lifting force is big, for ease of maintenaince, just because of small volume, institute
So that, without configuration guide ring, and cylinder diameter is small, and load is again big (pressure is more than 60Mpa), so unbalance loading is big, plus in jack on piston
End limited location groove, seal will pass through stopper slot, easily be chewed.The Y-shaped ring of in general single-acting, or Y-shaped ring add
Back-up ring can all be chewed.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of piston seal of automobile Horizontal hydraulic jack, its
High pressure can be born and prevent unbalance loading, and avoided by being chewed during stopper slot.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of piston seal of automobile Horizontal hydraulic jack, including U-shaped sealing ring and back-up ring；Jack is in piston rod
One end of body forms the piston rod step of the diameter greater diameter than piston bar body, the piston rod step and cylinder barrel it is interior
Space is maintained between wall, extends that to form a diameter straight less than the piston rod step along the other end of the piston rod step
The piston rod packing seat in footpath, the U-shaped sealing ring is set on the piston rod packing seat, for making piston bar body and cylinder barrel
Inwall between formed seal and the cylinder chamber of cylinder barrel is divided into the first cavity and the second cavity, positioned at second cavity
End is provided with stopper slot, and the back-up ring is used to limit the U-shaped sealing ring, and the outer edge of one end of the back-up ring forms one
The inside edge of ladder structure of right angle, the oblique girdle plane of the ladder structure of right angle and one end of back-up ring forms an obtuse angle, described U-shaped close
The lip of seal towards first cavity and the lip be height bead structure, the shape of the other end of the U-shaped sealing ring
It is adapted with the inside edge of one end of the back-up ring and the shape of the oblique girdle plane.
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the U-shaped sealing
Circle includes external lip and inner lip, and the inner lip is higher than the external lip.
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the inner lip ratio
The high 0.5mm of external lip.
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the inner lip with
Gap be present between the side wall of the piston rod packing seat.
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the gap away from
From for 0.5mm.
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the external lip and
The procheilon of the inner lip is identical with root diameter (RD).
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the depth of the lip
Degree accounts for the 30% to 50% of the whole U-shaped sealing ring width.
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the back-up ring is by gathering
Formaldehyde materials are made and/or the U-shaped sealing ring is made up of polyurethane material.
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the U-shaped sealing
Circle uses polyurethane material of the hardness for ShoreA95.
As a kind of improvement of the piston seal of automobile Horizontal hydraulic jack of the present utility model, the back-up ring it is straight
Footpath is more than the diameter of the piston rod step.
Compared with prior art, the advantageous effects that technical scheme is brought used by the utility model are：
Polyformaldehyde has the hardness, intensity and rigidity of metalloid, has good self lubricity, good fatigue durability
And oil resistance, and springiness, therefore support well can be played to U-shaped sealing ring using back-up ring made of polyformaldehyde and made
With.The ladder structure of right angle of back-up ring adds Area of bearing of the back-up ring to U-shaped sealing ring, can effectively bear high pressure and prevent
Cross unbalance loading.U-shaped sealing ring is designed for height lip, and the groove in lip is deeper than conventional design so that pressure energy is more added
Enter and reduce U-shaped sealing ring and cross the probability chewed during stopper slot.In addition, external lip and inner lip design abundant can also be prevented
Only the phenomenon of high pressure flange occurs.
Certainly, implement any product of the present utility model to it is not absolutely required to reach all the above advantage simultaneously.
Brief description of the drawings
Fig. 1 is a kind of sectional drawing face of the piston seal of automobile Horizontal hydraulic jack of the embodiment of the utility model one；
Fig. 2 is a kind of installation signal of the piston seal of automobile Horizontal hydraulic jack of the embodiment of the utility model one
Figure.
In figure, 1- back-up rings；2- ladder structure of right angle；3- oblique girdle planes；4- inside edges；5-U type sealing rings；6- external lips；7-
Inner lip；8- lips；9- cylinder barrels；10- stopper slots；11- piston bar bodies；12- piston rod steps；13- piston rod packing seats；
14- gaps.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Each embodiment of type is explained in detail.
As illustrated in fig. 1 and 2, a kind of piston seal of automobile Horizontal hydraulic jack, including U-shaped sealing ring 5 and back-up ring
1.The piston rod step 12 of the diameter greater diameter than piston bar body 11, piston rod platform are formed in one end of piston bar body 11
Space is maintained between the inwall of rank 12 and cylinder barrel 9, extends to form a diameter and be less than piston along the other end of piston rod step 12
The piston rod packing seat 13 of the diameter of bar step 12, seal is set on piston rod packing seat 13, for making piston rod and cylinder
Formed between the inwall of cylinder 9 and seal and the cylinder chamber of cylinder barrel 9 is divided into the first cavity and the second cavity.Wherein, the one of back-up ring 1
The outer edge at end forms a ladder structure of right angle 2, the oblique girdle plane 3 of ladder structure of right angle 2 and the shape of inside edge 4 of one end of back-up ring 1
Into an obtuse angle, the lip 8 of U-shaped sealing ring 5 towards the first cavity and lip 8 be height bead structure, the other end of U-shaped sealing ring 5
It is close to the inside edge 4 of one end of back-up ring 1 and oblique girdle plane 3.Specifically, back-up ring 1 is used to be supported fixation to U-shaped sealing ring 5,
U-shaped sealing ring 5 forms sealing between the inwall for making piston rod and cylinder barrel 9.The end of cylinder barrel 9 is circumferentially evenly arranged
Three stopper slots 10, when seal passes through stopper slot 10 under hydraulic action, stopper slot 10 plays a part of pressure release, makes sealing
Part is returned to original position again.Wherein ladder structure of right angle 2 adds the width of back-up ring 1, can effectively prevent U-shaped close
Seal 5 is because occurring unbalance loading and the gap flange between cylinder barrel 9 and piston rod step 12.The oblique girdle plane 3 of ladder structure of right angle 2
The contact area of back-up ring 1 and U-shaped sealing ring 5 is added, therefore also increases the ability that U-shaped sealing ring 5 bears high pressure.It is U-shaped close
The height bead structure design of seal 5, is advantageous to pressure and rapidly enters.
In the present embodiment, U-shaped sealing ring 5 includes external lip 6 and inner lip 7, and inner lip 7 is higher than external lip 6, phase gap
From preferably 0.5mm, but it is not limited.Further, gap be present between the side wall of inner lip 7 and piston rod packing seat 13
14, and the distance in gap 14 is preferably 0.5mm, but be not limited.Pressure rapidly can enter in lip 8 from external lip 6
Portion, and the overall producing balanced forces that gap 14 is advantageous to U-shaped sealing ring 5 are preserved between inner lip 7 and piston rod packing seat 13.
In the present embodiment, the gash depth of lip 8 accounts for the 30% to 50% of the whole U-shaped width of sealing ring 5.In the design,
Gash depth is deeper than conventional design so that pressure can faster enter, and U-shaped sealing ring 5 can bear bigger pressure and have
Bigger resilience scope, so as to reduce the probability that U-shaped sealing ring 5 is chewed by stopper slot 10.
In the present embodiment, external lip 6 is identical with root diameter (RD) with the procheilon of inner lip 7.In the design, it is not intended to increase
Add limitation of the present invention, but to illustrate that conventional design is compared in the procheilon part of the external lip 6 of U-shaped sealing ring 5 and inner lip 7
Must be abundant, high pressure flange can be prevented.
In the present embodiment, back-up ring 1 is made up of polyformaldehyde material and/or U-shaped sealing ring 5 is made up of polyurethane material, considers
To under the working condition of high pressure, polyurethane hardness is preferably ShoreA95.Polyformaldehyde have the hardness of metalloid, intensity and
Rigidity, there is good lubricity, good fatigue durability and oil resistance, and springiness, therefore back-up ring 1 can be to U-shaped
Sealing ring 53 plays support fixation well, avoids U-shaped sealing ring 53 that unbalance loading occurred.Polyurethane wear resistant performance is good；Machine
Tool intensity is big；Elasticity is good, has excellent restoration, available for dynamic juncture；Oil resistivity is good and moderate, therefore U-shaped close
Seal 53 can play good sealing and high voltage bearing effect.
In the present embodiment, the diameter of back-up ring 1 is more than the diameter of piston rod step 12.Jack is doing the process of piston movement
In, due to the supporting role of back-up ring 1, make to have remained space between the inwall of piston rod step 12 and cylinder barrel 9, avoid work
The friction of stopper rod and the inwall of cylinder barrel 9, so that effectively protection cylinder barrel 9 and the service life for extending hydraulic jack.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should
It is defined by scope of the claims.
Claims (10)
1. a kind of piston seal of automobile Horizontal hydraulic jack, including U-shaped sealing ring and back-up ring；Jack is in piston rod sheet
One end of body forms the piston rod step of the diameter greater diameter than piston bar body, the inwall of the piston rod step and cylinder barrel
Between maintain space, extend along the other end of the piston rod step to be formed a diameter be less than the piston rod step diameter
Piston rod packing seat, the U-shaped sealing ring is set on the piston rod packing seat, for making piston bar body and cylinder barrel
Formed between inwall and seal and the cylinder chamber of cylinder barrel is divided into the first cavity and the second cavity, positioned at the end of second cavity
Stopper slot is provided with end, the back-up ring is used to limit the U-shaped sealing ring, it is characterised in that：Outside one end of the back-up ring
Edge forms a ladder structure of right angle, and the inside edge formation one of the oblique girdle plane of the ladder structure of right angle and one end of back-up ring is blunt
Angle, the lip of the U-shaped sealing ring towards first cavity and the lip be height bead structure, the U-shaped sealing ring
The shape of the other end is adapted with the inside edge of one end of the back-up ring and the shape of the oblique girdle plane.
A kind of 2. piston seal of automobile Horizontal hydraulic jack as claimed in claim 1, it is characterised in that：It is described U-shaped
Sealing ring includes external lip and inner lip, and the inner lip is higher than the external lip.
A kind of 3. piston seal of automobile Horizontal hydraulic jack as claimed in claim 2, it is characterised in that：The epipharynx
Portion is higher 0.5mm than the external lip.
A kind of 4. piston seal of automobile Horizontal hydraulic jack as claimed in claim 3, it is characterised in that：The epipharynx
Gap be present between the side wall of portion and the piston rod packing seat.
A kind of 5. piston seal of automobile Horizontal hydraulic jack as claimed in claim 4, it is characterised in that：The gap
Distance be 0.5mm.
A kind of 6. piston seal of automobile Horizontal hydraulic jack as claimed in claim 2, it is characterised in that：The outer lip
Portion is identical with root diameter (RD) with the procheilon of the inner lip.
A kind of 7. piston seal of automobile Horizontal hydraulic jack as claimed in claim 1, it is characterised in that：The lip
Depth account for the 30% to 50% of the whole U-shaped sealing ring width.
A kind of 8. piston seal of automobile Horizontal hydraulic jack as claimed in claim 1, it is characterised in that：The back-up ring
It is made up of polyformaldehyde material and/or the U-shaped sealing ring is made up of polyurethane material.
A kind of 9. piston seal of automobile Horizontal hydraulic jack as claimed in claim 8, it is characterised in that：It is described U-shaped
Sealing ring uses polyurethane material of the hardness for ShoreA95.
A kind of 10. piston seal of automobile Horizontal hydraulic jack as claimed in claim 1, it is characterised in that：The gear
The diameter of circle is more than the diameter of the piston rod step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720610677.6U CN206830815U (en) | 2017-05-27 | 2017-05-27 | A kind of piston seal of automobile Horizontal hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720610677.6U CN206830815U (en) | 2017-05-27 | 2017-05-27 | A kind of piston seal of automobile Horizontal hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206830815U true CN206830815U (en) | 2018-01-02 |
Family
ID=60772895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720610677.6U Active CN206830815U (en) | 2017-05-27 | 2017-05-27 | A kind of piston seal of automobile Horizontal hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206830815U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682384A (en) * | 2020-12-29 | 2021-04-20 | 徐州金鼎恒立液压件有限公司 | Low-abrasion sealing device for piston hole of oil cylinder barrel |
-
2017
- 2017-05-27 CN CN201720610677.6U patent/CN206830815U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682384A (en) * | 2020-12-29 | 2021-04-20 | 徐州金鼎恒立液压件有限公司 | Low-abrasion sealing device for piston hole of oil cylinder barrel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206830815U (en) | A kind of piston seal of automobile Horizontal hydraulic jack | |
| CN202280687U (en) | Plunger oil cylinder | |
| CN107152456A (en) | Porous ultrasonic bearing | |
| CN102720167B (en) | Supporting device used for supporting oil cylinder | |
| CN206886588U (en) | A kind of piston seal of automobile Horizontal hydraulic jack | |
| CN202251956U (en) | Floating gap seal with high speed, high frequency and high abrasion resistance | |
| CN203685757U (en) | Hydraulic cylinder | |
| CN202756337U (en) | Hydraulic cylinder for car dumper | |
| CN112555226B (en) | Low-friction sealing device for hydraulic cylinder piston rod shaft | |
| CN212356128U (en) | Hydraulic buffer roller cage shoe | |
| CN205350057U (en) | Outer three row tooth -like cylindrical roller slewing bearing | |
| CN202789837U (en) | Variable oil cylinder with glyd ring | |
| CN113431771A (en) | Radial plunger pump | |
| CN203051299U (en) | Front-mounted hydraulic cylinder lifting mechanism of heavy dump truck | |
| CN205331115U (en) | Take cylinder or hydro -cylinder of novel bearing | |
| CN206555084U (en) | Mud piston | |
| CN203009155U (en) | Oil distribution disc of hydraulic motor | |
| CN206266157U (en) | A kind of pressing machine hydraulic jack | |
| CN204663868U (en) | A kind of profile control and water plugging pump adopting novel sealing structure | |
| CN215762527U (en) | Static seal of high-low pressure resistant guide sleeve | |
| CN206309524U (en) | A kind of plunger with bearing shell being applied in plunger hydraulic motor | |
| CN101725713A (en) | Self-adapting medium pressure reciprocating dynamic sealing device | |
| CN202597075U (en) | Variable piston engraved with pressure balancing groove | |
| CN201575149U (en) | Reciprocating dynamic sealing apparatus of self-adapting medium pressure | |
| CN203868024U (en) | Sealing bearing structure for cab flip oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Building 1, No. 373 Renqing Road, Pudong New Area, Shanghai, 200319 Patentee after: Shanghai Weiwan Sealing Technology Co., Ltd Address before: 200319, No. 1300, Lane 3, Cambridge East Road, Cambridge Town, Shanghai, Pudong New Area Patentee before: VONESEALS TECHNOLOGY (SHANGHAI) Co.,Ltd. |