CN105782157A - Hydraulic cylinder with buffer function - Google Patents
Hydraulic cylinder with buffer function Download PDFInfo
- Publication number
- CN105782157A CN105782157A CN201410805201.9A CN201410805201A CN105782157A CN 105782157 A CN105782157 A CN 105782157A CN 201410805201 A CN201410805201 A CN 201410805201A CN 105782157 A CN105782157 A CN 105782157A
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- Prior art keywords
- valve pocket
- valve
- positive stop
- piston
- hydraulic cylinder
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Abstract
The invention provides a hydraulic cylinder with a buffer function. The hydraulic cylinder comprises a piston rod, a cylinder head, a cylinder barrel, a piston, a valve cavity, a cylinder bottom and a buffer assembly, wherein the valve cavity is formed in the piston and penetrates through the piston in the axial direction, and the buffer assembly is arranged in the valve cavity. The valve cavity minor diameter of the middle section of the valve cavity is smaller than the valve cavity major diameter of the two ends of the valve cavity. The buffer assembly comprises a valve rod and two limiting structures arranged at the two ends of the valve rod. Each limiting structure comprises a limiting stopping block, a fixing bolt and a spring. A sealing gasket is arranged in the position, close to the end surface of the valve rod, of each limiting stopping block. Each fixing bolt penetrates through the corresponding limiting stopping block and is connected to the valve rod. The limiting stopping blocks can freely slide on the fixing bolts. A nut of each fixing bolt abuts against the outer side of the corresponding limiting stopping block. Each spring is arranged between the corresponding limiting stopping block and the valve rod. The hydraulic cylinder with the buffer function is reasonable in structure, convenient to produce and machine, easy to install, good in sealing performance, capable of automatically compensating abrasion of a buffer piece and stable in performance.
Description
Technical field
The invention relates to a kind of hydraulic cylinder, particularly relates to a kind of band buffering hydraulic cylinder.
Background technology
Traditional buffering structure of hydraulic cylinder, has higher requirements to the axiality of buffer plunger Yu piston, production and processing difficulty, if axiality is bad, piston and buffer plunger single-edge grinding will be occurred inclined.Arranging the buffering hydraulic cylinder of valve pocket and Buffer Unit on existing piston, can affect buffering effect due to the long term wear at Buffer Unit two ends, simultaneous buffering components sealing is difficult to be guaranteed.
Summary of the invention
The problem that the invention to solve is a kind of band buffering hydraulic cylinder, it is possible to stable work, will not affect buffering effect, simultaneous buffering part good airproof performance because of the abrasion of Buffer Unit.
For solving above-mentioned technical problem, the invention the technical scheme is that a kind of band buffering hydraulic cylinder, including piston rod, and cylinder head, cylinder barrel, piston, axially through the valve pocket of piston on piston, cylinder bottom, the Buffer Unit in valve pocket；The valve pocket path in described valve pocket stage casing is less than the big footpath of the valve pocket at valve pocket two ends；Described Buffer Unit includes valve rod and two position limiting structures of valve rod two ends setting, described position limiting structure includes positive stop, fixing bolt, spring, the sealing gasket that positive stop is provided with near the end face of valve rod, fixing bolt passes from positive stop and is connected to valve rod, and positive stop can on fixing bolt slidably, the nut of fixing bolt props up outside positive stop, is provided with spring between positive stop and valve rod.
Further, described positive stop is cylindrical.
Further, described positive stop diameter is less than the big footpath of the valve pocket of valve pocket and more than the valve pocket path of valve pocket.
Further, the length that described positive stop thickness is axial less than the big footpath of valve pocket.
The invention has the advantage that and has the benefit effect that rational in infrastructure, and production and processing is convenient, installs simple, good airproof performance, it is possible to automatically compensate the abrasion of bolster, stable performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the invention；
Fig. 2 is that the invention A goes out structure enlarged diagram.
In figure: 1-piston rod；2-cylinder head；3-cylinder barrel；4-piston；5-valve pocket；6-cylinder bottom；7-Buffer Unit；51-valve pocket path；The big footpath of 52-valve pocket；71-valve rod；72-position limiting structure；73-positive stop；74-fixes bolt；75-spring；76-sealing gasket；77-nut；78-spring.
Detailed description of the invention
A kind of band buffering hydraulic cylinder, as it is shown in figure 1, include piston rod 1, cylinder head 2, cylinder barrel 3, piston 4, axially through the valve pocket 5 of piston 4 on piston 4, cylinder bottom 6, the Buffer Unit 7 in valve pocket 5；The valve pocket path 51 in described valve pocket 5 stage casing is less than the big footpath 52 of the valve pocket at valve pocket two ends；Described Buffer Unit 7 includes valve rod 71 and two position limiting structures 72 of valve rod 71 two ends setting, as shown in Figure 2, described position limiting structure 72 includes positive stop 73, fixing bolt 74, spring 75, the sealing gasket 76 that positive stop 73 is provided with near the end face of valve rod 71, fixing bolt 74 passes and is connected to valve rod 71 from positive stop 73, positive stop 73 can on fixing bolt 74 slidably, the nut 77 of fixing bolt 74 props up outside positive stop 73, is provided with spring 78 between positive stop 73 and valve rod 71.Described positive stop 72 is cylindrical.Described positive stop 72 diameter is less than the big footpath 52 of the valve pocket of valve pocket 5 and the valve pocket path 51 more than valve pocket 5.The length that described positive stop 72 thickness is axial less than footpath 51, valve pocket 5 valve pocket big footpath.
When piston 4 contacts with cylinder bottom 6, Buffer Unit 7 is propped up by cylinder bottom 6, sealing gasket 76 is compacted plays sealing function, valve pocket 5 is blocked, when the big chamber oil-feed of hydraulic cylinder, piston 4 is pushed off cylinder bottom 6 by hydraulic oil, now Buffer Unit still keeps initial position under hydraulic fluid pressure effect, when piston 4 is pushed to cylinder head 2, Buffer Unit 7 other end first contacts cylinder head 2, Buffer Unit 7 is propped up by cylinder head 2 and moves to cylinder bottom 6 direction, now sealing gasket 76 is inoperative, piston 4 two ends cavity communicates, high pressure side hydraulic oil moment flows to low pressure side, play cushioning effect, when piston 4 contacts with cylinder head 2, valve pocket 5 is blocked again by Buffer Unit 7 sealing gasket 76.When, after positive stop 73 with cylinder head 2 or cylinder bottom 6 contact wear, the spring 78 of pre-pressing can extend the wear extent compensating positive stop 73, and integrated buffer effect will not change.
Above the embodiment of the invention is described in detail, but described content has been only the preferred embodiment of the invention, it is impossible to be considered the practical range for limiting the present invention.All equalizations made according to the invention scope change and improvement etc., all should still belong within this patent covering scope.
Claims (4)
1. a band buffering hydraulic cylinder, including piston rod (1), cylinder head (2), cylinder barrel (3), piston (4), axially through the valve pocket (5) of piston (4) on piston (4), cylinder bottom (6), the Buffer Unit (7) in valve pocket (5)；The valve pocket path (51) in described valve pocket (5) stage casing is less than the big footpath of the valve pocket at valve pocket two ends (52)；It is characterized in that: described Buffer Unit (7) includes valve rod (71) and two position limiting structures (72) of valve rod (71) two ends setting, described position limiting structure (72) includes positive stop (73), fixing bolt (74), spring (75), the sealing gasket (76) that the end face of the close valve rod (71) of positive stop (73) is provided with, fixing bolt (74) is from positive stop (73) traverse and is connected to valve rod (71), positive stop (73) can on fixing bolt (74) slidably, the nut (77) of fixing bolt (74) props up positive stop (73) outside, spring (75) it is provided with between positive stop (73) and valve rod (71).
2. a kind of band buffering hydraulic cylinder according to claim 1, it is characterised in that: described positive stop (72) is cylindrical structural.
3. a kind of band buffering hydraulic cylinder according to claim 1 and 2, it is characterised in that: described positive stop (72) the diameter big footpath of valve pocket (52) less than valve pocket (5) and the valve pocket path (51) more than valve pocket (5).
4. a kind of band buffering hydraulic cylinder according to claim 1, it is characterised in that: the length that described positive stop (72) thickness is axial less than the big footpath of valve pocket (5) valve pocket (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410805201.9A CN105782157A (en) | 2014-12-20 | 2014-12-20 | Hydraulic cylinder with buffer function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410805201.9A CN105782157A (en) | 2014-12-20 | 2014-12-20 | Hydraulic cylinder with buffer function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105782157A true CN105782157A (en) | 2016-07-20 |
Family
ID=56386387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410805201.9A Pending CN105782157A (en) | 2014-12-20 | 2014-12-20 | Hydraulic cylinder with buffer function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105782157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340216A (en) * | 2018-12-10 | 2019-02-15 | 江苏恒立液压股份有限公司 | Cushion cylinder |
-
2014
- 2014-12-20 CN CN201410805201.9A patent/CN105782157A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340216A (en) * | 2018-12-10 | 2019-02-15 | 江苏恒立液压股份有限公司 | Cushion cylinder |
| CN109340216B (en) * | 2018-12-10 | 2024-03-26 | 江苏恒立液压股份有限公司 | Buffer oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160720 |
|
| WD01 | Invention patent application deemed withdrawn after publication |