CN208221576U - A kind of built-up piston assembly - Google Patents
A kind of built-up piston assembly Download PDFInfo
- Publication number
- CN208221576U CN208221576U CN201820387818.7U CN201820387818U CN208221576U CN 208221576 U CN208221576 U CN 208221576U CN 201820387818 U CN201820387818 U CN 201820387818U CN 208221576 U CN208221576 U CN 208221576U
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- China
- Prior art keywords
- piston
- ring
- piston assembly
- built
- piston body
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- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 239000004677 Nylon Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000004519 grease Substances 0.000 description 7
- 230000001050 lubricating effect Effects 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Traditional piston assembly is generally sealed using single O-ring seal, piston body unbalance stress often occurs, and cylinder generates eccentric wear, sealing ring earlier period damage, so occur cylinder collaborate, the seal failures phenomenon such as gas leakage.The utility model relates to the built-up piston field of speed changer, specially a kind of built-up piston assembly, including piston body, support ring and y-shaped ring；Support ring and y-shaped ring are sleeved on the side wall of piston body.When piston assembly does piston motion in the cylinder, support ring provides support to piston assembly, and y-shaped ring provides sealing and certain supporting role to piston body；Since support ring and y-shaped ring are on the side wall for be sleeved on piston body, be it is detachable, convenient for being checked sealing ring and being replaced in use, avoid replacing entire piston assembly, reduce waste, be conducive to later maintenance.
Description
[technical field]
The utility model relates to the built-up piston fields of speed changer, and in particular to a kind of built-up piston assembly.
[background technique]
In combined type automobile speed changer, forward and backward odd-side is all made of air-operated control, the quality of cylinder and piston assembly design
Very big on the influence of the service life of secondary box of gearbox, traditional piston assembly is generally sealed using single O-ring seal, often
The failure of appearance mainly has a piston body unbalance stress, and cylinder generates eccentric wear, sealing ring earlier period damage, so occur cylinder collaborate,
The seal failures phenomenon such as gas leakage.
The improvement in some structures was had also been made to cylinder and piston in recent years, to improve the support of piston in the cylinder.It is right
The improvement of piston assembly, which is mainly shown as to use, is embedded in piston body for the sealing element press fitting with skeleton in a manner of non-removable
Both ends, or seal rubber is directly vulcanized and is coated on piston body both ends, improve what piston body force unbalance generated to reach
Seal failure phenomenon.However sealing element belongs to quick-wear part, uses and be easy to produce in transporting abrasion or scratch, when sealing
When part damages, generally requires together to replace entire piston assembly, cause greatly to waste, be unfavorable for lean production and management.
[utility model content]
The utility model relates to a kind of built-up piston assemblies, including piston body, support ring and y-shaped ring.Y shape sealing
Circle is in the sealed groove of piston body sidewall two sides, and opening supports ring is loaded in the annular groove in the middle part of piston body sidewall, after assembly
Support ring outer diameter is higher by piston body sidewall, support is provided to piston assembly from middle part during piston motion, outside y-shaped ring
Bilabial goes out the periphery of piston body and support ring, provides sealing and certain support to piston from piston two sides.Y shape circle and work
Cock body is installed using detachable interference fit, convenient for being checked sealing ring and being replaced in use.
In order to achieve the above objectives, the utility model is achieved using following technical scheme.
A kind of built-up piston assembly, including piston body, support ring and y-shaped ring, support ring and y-shaped ring cover
On the side wall of piston body.
Further improvement of the utility model is:
The piston body sidewall offers two for being set with y-shaped ring sealed groove, opens between two sealed grooves
Equipped with the annular groove for being set with support ring.
The y-shaped ring includes outer lip, epipharynx and root；The top of root is valley；The length of outer lip is less than epipharynx
Length；The vertical range of epipharynx top to root bottom end is L, the radius R of outer lip2With the radius R of epipharynx1Difference is M, L/M >=
2。
The radius R of the epipharynx1Less than the radius of sealed groove, the radius R of outer lip2Greater than for assembling built-up piston
The half of assembly cylinder bore diameter.
When the y-shaped ring is sleeved on sealed groove, epipharynx is contacted with sealed groove bottom, and outer lip and valley are sealing
Outside groove.
The support ring is sleeved on annular groove and when y-shaped ring is sleeved on sealed groove, the outer diameter D of support ring2Greatly
In the diameter of piston body, the outer diameter D of outer lip1Greater than the outer diameter of support ring；
Rounded corner form is used at the sidewall edge of the sealed groove.
The support ring is opening form, selects nylon material.
Compared with prior art, the utility model has the following beneficial effects:
The utility model relates to a kind of built-up piston assemblies, including piston body, support ring and y-shaped ring；Support ring
It is sleeved on y-shaped ring on the side wall of piston body.When piston assembly does piston motion in the cylinder, support ring is to piston
Assembly provides support, and y-shaped ring provides sealing and certain supporting role to piston body；Due to support ring and y-shaped ring
It is to be sleeved on the side wall of piston body, to be detachable, convenient for being checked sealing ring and being replaced in use, avoids
Entire piston assembly is replaced, waste is reduced, is conducive to later maintenance.
Further, support ring and y-shaped ring are set in the sealing ditch that piston body opens up middle part annular groove and two sides
In slot, support ring is made to provide support to piston body in the middle part of piston body, y-shaped ring provides branch from the both ends of piston body sidewall
Support when doing piston motion in the cylinder, makes the side wall uniform force of piston body, reduces the abrasion to piston body.
Further, y-shaped ring selects not contour lip shape shape and exoskeletal form, and the length of outer lip is less than the length of epipharynx
Degree can prevent Y shape cirque portion from cracking, and y-shaped cross-section height, wide ratio >=2 make y-shaped ring be not easy to overturn in sealed groove.
Further, the radius of epipharynx is less than the radius of sealed groove, and the radius of outer lip is greater than for assembling combined live
The half for filling in assembly cylinder bore diameter, makes inside and outside lip have certain magnitude of interference with piston body and cylinder coupling surface respectively；When piston is total
When at being axially moved in cylinder, being close to coupling surface by the inside and outside lip that sealing ring opens, reaching good sealing effect.
Further, when y-shaped ring is sleeved on sealed groove, epipharynx is contacted with sealed groove bottom, outer lip and valley
Outside sealed groove, make piston assembly in cylinder motion, there are lubricant grease in the two sides of y-shaped ring outer lip, sealing
Circle is chronically at the state of lubricating grease package, and sealing ring has good lubrication, reduces the abrasion to sealing ring.
Further, the outer diameter D of rear support ring is assembled2Greater than the diameter of piston body, to piston during piston motion
Assembly provides support, deflection is generated when preventing piston from moving in the cylinder, while can avoid outside cylinder inner wall and piston body straight
Contact generates premature wear.The outer diameter D of outer lip1Greater than the outer diameter of support ring, when piston assembly is run in the cylinder, from piston
Two sides provide sealing and certain support to piston, keep operational process more stable, sealing performance is more excellent, high reliablity.
Further, rounded corner form is used at the sidewall edge of sealed groove, convenient for the assembly of y-shaped ring, simultaneously
Piston body sharp edge be can avoid since the cutting edge and burr of machining generation generate scuffing to piston component.
Further, support ring is open-type, is easily installed and dismantles；It selects nylon material wear-resistant and has self-lubricating function
Energy.
[Detailed description of the invention]
Fig. 1 is piston assembly cross-sectional view；
Fig. 2 is piston assembly schematic three dimensional views；
Fig. 3 is piston body cross-sectional view；
Fig. 4 is piston body schematic three dimensional views；
Fig. 5 is y-shaped ring cross-sectional view；
Fig. 6 is y-shaped ring sectional view；
Fig. 7 is y-shaped ring schematic three dimensional views；
Fig. 8 is support ring schematic three dimensional views；
Wherein: 1- piston body；2- support ring；3-Y shape sealing ring；4- outer lip；5- epipharynx；6- valley；The root 7-；8- sealing
Groove；9- annular groove.
[specific embodiment]
Referring to Fig. 1 and Fig. 2, the utility model relates to a kind of built-up piston assembly, including piston body 1, support ring 2 and Y
Shape sealing ring 3；Piston body 1 is opened up in side wall there are two sealed groove 8, and portion offers annular groove 9 in the sidewall；Y-shaped ring 3 is pacified
In sealed groove 8, support ring 2 is mounted in annular groove 9；Y-shaped ring 3 is not contour lip shape shape, including outer lip 4, epipharynx
5, the top valley 6 of root 7 and root 7.
Referring to Fig. 3 and Fig. 4, piston body 1 both sides sealing groove, 8 depth are shallower, make the outer lip 4 and valley 6 of y-shaped ring 3
It is completely in the outside of sealed groove 8, sealing ring is made to be chronically at the state of lubricating grease package, sealing ring has good lubrication；
The sidewall edge of sealed groove 8 is by round corner treatment, in favor of the installation of sealing ring.
Referring to Fig. 5, Fig. 6 and Fig. 7, y-shaped ring 3 is designed using Synergistic type, selects not contour lip y-shaped ring, outer lip 4
Short, epipharynx 5 is long, can prevent y-shaped ring 3 from valley cracking occurs, improve the service life of y-shaped ring 3；Y-shaped ring 3 is adopted
With asymmetric, narrow section, exoskeletal form；The vertical range of 5 top of y-shaped cross-section epipharynx to 7 bottom end of root is L, the half of outer lip 4
Diameter R2With the radius R of epipharynx 51Difference is M, and L/M >=2 make y-shaped ring 3 be not easy to overturn in sealed groove 8；Y-shaped ring
5 radius R of epipharynx1Less than the radius of sealed groove 8, the radius R of outer lip 42Greater than for assembling in built-up piston assembly cylinder
The half of diameter, when making assembly, outer lip 4 has certain magnitude of interference with piston body 1 and cylinder coupling surface respectively, opens by it
Inside and outside lip is close to coupling surface, reaches excellent sealing effect.
Referring to Fig. 8, support ring 2 is opening form, wear-resistant and have self-lubricating function using nylon material.
It can be seen that in conjunction with Fig. 1, piston body 1 is processed sealed groove 8 and annular groove 9 according to design drawing by the utility model,
Support ring 2 is assemblied in annular groove 9, and y-shaped ring 3 is assemblied in the sealed groove 8 of 1 side wall two sides of piston body, forms piston assembly.
Wherein the periphery of support ring 2 is higher by 1 side wall of piston body, make support ring 2 during piston motion from middle part to piston assembly
Support is provided, prevents piston body 1 from generating deflection when moving in the cylinder, while avoidable cylinder inner wall and 1 side wall of piston body are straight
Contact generates premature wear；Y shape rubber seal outer lip 4 is higher by the periphery of piston body 1 and support ring 2, from 1 liang of piston
Side provides sealing and certain support to piston 1.Because piston body 1 both sides sealing groove, 8 depth are shallower, make the outer of y-shaped ring
Lip 4 and valley 6 are completely in the outside of sealed groove 8, make 4 two sides of outer lip that can store a certain amount of lubricating grease, keep outer lip 4 long
Phase is in the state of lubricating grease package, and sealing ring has good lubrication, Y shape circle lesser sliding-frictional resistance when ensure that work
With longer service life；Epipharynx 5 is contacted with 8 bottom of sealed groove, and with contact surface without relative motion, the design of epipharynx 5 has larger
Pre compressed magnitude, prevent Y shape circle from groove deviate from；In cylinder, the sealing contact surface of outer lip 4 and cylinder has relative motion, gives
Smaller pre compressed magnitude out guarantees that the resistance that piston assembly is moved in cylinder can be reduced while sealing effect.
After piston assembly is packed into cylinder, one will form between the root 7 of y-shaped ring 3, Y shape sealing lip 3 and slidingsurface
Fixed annular cavity space, in can store a certain amount of lubricating grease, while the annular groove 9 of opening supports ring 2 and piston body 1 is formed
Groove can also store certain lubricating grease, ensure that piston body 1 during axially moving, has good between piston 1 and cylinder
Good lubrication, prevents dry friction from making ring wear and aging, and can reduce sliding-frictional resistance.
The utility model piston assembly structure is simple, by using support ring 2 from the middle part of piston body 1 and sealing ring from work
1 two sides of cock body provide sealing and certain support to piston body 1, piston assembly are made to support balance in cylinder block, run more flat
Surely；The use of new construction y-shaped ring ensure that the good lubrication in piston operational process, and leakproofness is more excellent, and reliability is more
It is high；Meanwhile exoskeletal y-shaped ring 3 and piston body 1 are the installation of detachable interference fit, convenient in use to close
Seal is checked and is replaced, and later maintenance is conducive to.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (8)
1. a kind of built-up piston assembly, which is characterized in that including piston body (1), support ring (2) and y-shaped ring (3), branch
Pushing out ring (2) and y-shaped ring (3) are sleeved on the side wall of piston body (1).
2. a kind of built-up piston assembly according to claim 1, which is characterized in that piston body (1) side wall offers two
It is a for being set with the sealed grooves (8) of y-shaped ring (3), offer between two sealed grooves (8) for being set with support ring
(2) annular groove (9).
3. a kind of built-up piston assembly according to claim 2, which is characterized in that y-shaped ring (3) includes outer lip
(4), epipharynx (5) and root (7)；The top of root (7) is valley (6)；The length of outer lip (4) is less than the length of epipharynx (5)；It is interior
The vertical range of lip (5) top to root (7) bottom end is L, the radius R of outer lip (4)2With the radius R of epipharynx (5)1Difference is M, L/
M≥2。
4. a kind of built-up piston assembly according to claim 3, which is characterized in that the radius R of epipharynx (5)1Less than sealing
The radius of groove (8), the radius R of outer lip (4)2Greater than the half for assembling built-up piston assembly cylinder bore diameter.
5. a kind of built-up piston assembly according to claim 3, which is characterized in that y-shaped ring (3) is sleeved on sealing
When groove (8), epipharynx (5) is contacted with sealed groove (8) bottom, and outer lip (4) and valley (6) are external in sealed groove (8).
6. a kind of built-up piston assembly according to claim 3, which is characterized in that support ring (2) is sleeved on annular groove (9)
And y-shaped ring (3) is when being sleeved on sealed groove (8), the outer diameter D of support ring (2)2Greater than the diameter of piston body (1), outer lip
(4) outer diameter D1Greater than the outer diameter of support ring (2).
7. according to right want 2 described in a kind of built-up piston assembly, which is characterized in that at the sidewall edge of sealed groove (8)
Using rounded corner form.
8. a kind of built-up piston assembly described in -7 any one according to claim 1, which is characterized in that support ring (2) is
Opening form selects nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820387818.7U CN208221576U (en) | 2018-03-21 | 2018-03-21 | A kind of built-up piston assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820387818.7U CN208221576U (en) | 2018-03-21 | 2018-03-21 | A kind of built-up piston assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208221576U true CN208221576U (en) | 2018-12-11 |
Family
ID=64502895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820387818.7U Expired - Fee Related CN208221576U (en) | 2018-03-21 | 2018-03-21 | A kind of built-up piston assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208221576U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667742A (en) * | 2019-01-31 | 2019-04-23 | 西北工业大学 | A kind of powder storage tank inner piston sealing device |
| CN115182944A (en) * | 2022-06-10 | 2022-10-14 | 陕西法士特齿轮有限责任公司 | Intermediate shaft brake sealing and positioning structure and intermediate shaft brake |
-
2018
- 2018-03-21 CN CN201820387818.7U patent/CN208221576U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667742A (en) * | 2019-01-31 | 2019-04-23 | 西北工业大学 | A kind of powder storage tank inner piston sealing device |
| CN115182944A (en) * | 2022-06-10 | 2022-10-14 | 陕西法士特齿轮有限责任公司 | Intermediate shaft brake sealing and positioning structure and intermediate shaft brake |
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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: 20181211 |