CN201474955U - Automobile oil cylinder piston structure - Google Patents
Automobile oil cylinder piston structure Download PDFInfo
- Publication number
- CN201474955U CN201474955U CN2009201569743U CN200920156974U CN201474955U CN 201474955 U CN201474955 U CN 201474955U CN 2009201569743 U CN2009201569743 U CN 2009201569743U CN 200920156974 U CN200920156974 U CN 200920156974U CN 201474955 U CN201474955 U CN 201474955U
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- piston
- groove
- hydraulic oil
- sealing
- pressure
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Abstract
The utility model relates to an automobile oil cylinder piston structure, which belongs to the field of hydraulic pumps. Two end surfaces of the piston of the utility model are provided with check valve bores; the excircle of the piston is at least provided with five grooves; the grooves are provided with unilateral bores; the unilateral bores of the second groove and the fourth groove are communicated with the check valve bores of the two end surfaces; and sealing elements are arranged in the first groove, the third groove and the fifth groove. Due to the fact that the two end surfaces of the piston are provided with the check valve bores, and the grooves of the excircle of the piston and the inner wall of a cylinder barrel enclose an annular cushion space, when the system pressure suddenly rises and the first sealing element can not bear the suddenly rising pressure, hydraulic oil enters the annular cushion space through the first sealing element; the pressure of the hydraulic oil opens the check valve bores, and then the hydraulic oil is discharged, and thereby, the pressure born by the second sealing element is reduced, the service life of the sealing elements is prolonged and the hydraulic oil blowby of the piston sealing elements is avoided. The utility model has simple and compact structure and convenient use and effectively prolongs the service life of the sealing elements.
Description
One, technical field
The utility model relates to a kind of automobile oil cylinder piston structure, belongs to the oil hydraulic pump field.
Two, background technique
The automobile oil cylinder piston structure of selling in the market and using is: select the Sealing form for use according to operating conditions such as pressure, speed, temperature, the Sealing form is determined the groove of back installation and processing Sealing on piston.When this kind structure raise suddenly when system pressure, Sealing bore pressure and increases, because of there not being pressure buffer, be in the high pressure working state always, cause Sealing to damage seal failure, cause piston seal hydraulic oil " blowby ", even cause the serious suddenly of whole cylinder to be leaked.
Three, summary of the invention
The purpose of this utility model is to provide a kind of can avoid piston seal hydraulic oil " blowby ", prolongs seal durability, and performance is good, and is simple in structure, compact automobile oil cylinder piston structure.
Technological scheme is: the utility model is in the hole of side face of piston ring installation and processing one-way valve; At least process five grooves on the outside piston, monolateral boring communicates with the unidirectional valve opening of end face on the second, the 4th groove.Wherein the first, the 3rd, the 5th groove is installed Sealing; The second, the 4th groove is not installed Sealing, surrounds two ring-type buffer spaces with inner wall of cylinder.The both ends of the surface valve opening is respectively installed a non-return valve.
The utility model is owing to be provided with two one-way valves on side face of piston ring; There are two grooves and inner wall of cylinder to surround two ring-type buffer spaces in five grooves of outside piston.So when system pressure raises suddenly, the first road Sealing holds when can't stand unexpected elevated pressure, hydraulic oil is by the first road Sealing, enter the ring-type buffer space, the pressure of hydraulic oil is discharged one-way valve opens hydraulic oil, thereby has been reduced the pressure that the second road Sealing bears, improve the working life of Sealing, avoided piston seal hydraulic oil " blowby ".The utility model is simple in structure, compact, working life easy to use, as to effectively raise Sealing.
Four, description of drawings
Fig. 1 is the utility model structural representation.
Five, embodiment
The utility model is processed five grooves at least on piston 1 cylindrical, wherein install respectively in Sealing 6, the second and the 4th groove 4 in first, the 3rd and the 5th groove 4 and be provided with monolateral boring 5, and surround a ring-type buffer space with cylinder barrel 2 inwalls.Monolateral boring 5 communicates with the unidirectional valve opening 3 of piston 1 both ends of the surface.The unidirectional valve opening 3 of piston 1 both ends of the surface is respectively installed a non-return valve.
The utility model is when work, move to the B chamber when piston 1 is stressed, when system pressure raises suddenly, if holding, the Sealing of installing in the groove 46 can't stand unexpected elevated pressure, hydraulic oil enters first ring-type buffer space that groove 4 and cylinder barrel 2 inwalls surround, the pressure of hydraulic oil is opened the non-return valve in the unidirectional valve opening 3 in the ring-type buffer space, and hydraulic oil is discharged to the A chamber, has reduced the pressure that Sealing 6 is born in the groove 4.Move to the A chamber when piston 1 is stressed, when system pressure raises suddenly, the Sealing of installing in the groove 46 holds can't stand unexpected elevated pressure, hydraulic oil enters second ring-type buffer space that groove 4 and cylinder barrel 2 inwalls surround, the pressure of hydraulic oil is opened non-return valve in the ring-type buffer space, hydraulic oil is discharged to the B chamber, has reduced the pressure that Sealing 6 is born in the groove 4, improved the working life of Sealing 6.
Claims (2)
1. automobile oil cylinder piston structure, comprise: piston (1), cylinder barrel (2), it is characterized in that: piston (1) both ends of the surface are provided with unidirectional valve opening (3), at least be provided with five grooves (4) on piston (1) cylindrical, in the second, the 4th groove, be provided with monolateral boring (5), the second, the monolateral boring of the 4th groove (5) communicates with the unidirectional valve opening (3) of both ends of the surface, is provided with Sealing (6) in the first, the 3rd, the 5th groove.
2. automobile oil cylinder piston structure according to claim 1 is characterized in that: the second, the 4th groove (4) surrounds two ring-type buffer spaces with cylinder barrel (2) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201569743U CN201474955U (en) | 2009-06-09 | 2009-06-09 | Automobile oil cylinder piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201569743U CN201474955U (en) | 2009-06-09 | 2009-06-09 | Automobile oil cylinder piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474955U true CN201474955U (en) | 2010-05-19 |
Family
ID=42411201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201569743U Expired - Lifetime CN201474955U (en) | 2009-06-09 | 2009-06-09 | Automobile oil cylinder piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201474955U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608985A (en) * | 2020-06-02 | 2020-09-01 | 香河凯华齿轮有限公司 | Gear punching oil cylinder |
-
2009
- 2009-06-09 CN CN2009201569743U patent/CN201474955U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608985A (en) * | 2020-06-02 | 2020-09-01 | 香河凯华齿轮有限公司 | Gear punching oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
|
| CX01 | Expiry of patent term |