CN203627378U - Decompression valve for lift cylinder of bulldozer - Google Patents
Decompression valve for lift cylinder of bulldozer Download PDFInfo
- Publication number
- CN203627378U CN203627378U CN201320886369.8U CN201320886369U CN203627378U CN 203627378 U CN203627378 U CN 203627378U CN 201320886369 U CN201320886369 U CN 201320886369U CN 203627378 U CN203627378 U CN 203627378U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve seat
- spool
- bulldozer
- 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.)
- Expired - Lifetime
Links
- 230000006837 decompression Effects 0.000 title claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- Fluid-Driven Valves (AREA)
Abstract
The utility model provides a decompression valve for a lift cylinder of a bulldozer. The decompression valve is mainly composed of a piston, a valve seat and a valve core, wherein interference fit is performed on a contact place between the piston and the valve seat, and one end of an interference fit surface adjacent to the valve hole of the valve seat is 3-5- mm away from a section where the valve hole is, so that the valve hole is avoided; the valve core and the guide hole of the valve seat are subjected to clearance fit; and the two ends of the valve core are in solid structures. The decompression valve provided by the utility model is simple in structure, convenient to process, and high in production efficiency; the interference part structure is avoided by adopting the valve hole of the valve seat, so that the assembling and press fitting yield is 100%; furthermore, the two ends of the valve core are in solid structures, so that the reliability can be improved; in addition, the design precisions of the valve core and the valve seat are reduced, the functions can be improved, the processing difficulty of the valve seat can be reduced, and the functions can be guaranteed to realize.
Description
Technical field
The utility model belongs to technical field of hydraulic oil cylinder, is specifically related to a kind of bulldozer lifting oil cylinder pressure-relief valve structure.
Background technique
The hydraulic actuator that does straight reciprocating motion that hydraulic jack is is mechanical energy by hydraulic energy transfer, it is simple in structure, and reliable operation is used widely in the hydraulic system of various machineries.For the work of bulldozer scraper bowl during to high-low limit, system releasing pressure automatically, this just requires bulldozer lifting oil cylinder on piston, to design Decompression valves.Bulldozer lifting oil cylinder all adopts spool and valve seat is installed on piston at present, the General Construction of spool and valve seat uses on bulldozer lifting oil cylinder always, but there are a lot of drawbacks: the one, valve seat and piston adopt interference fit seal, in the time of assembling, easily cause valve mouth (sealing strip of spool and valve seat) distortion, spool and valve base sealing were lost efficacy, while causing bulldozer scraper bowl to be parked in middle arbitrary position, sink, easily cause security incident, and can not meet the demand of bulldozer function; The 2nd, center hole is left at spool two ends, and spool hardness is higher, when work, opens pressure release by spool two ends, and in long-term work, fragmentation is easily clashed in spool end, causes that hydraulic system of bulldozer lost efficacy; The 3rd, spool and valve seat required precision are high, need to adopt grinding machine processing, and work efficiency is low, and cost of production is increased.
Summary of the invention
The utility model provides a kind of bulldozer lifting oil cylinder Decompression valves, to solve the problems of the technologies described above.
The utility model is mainly made up of piston, valve seat, spool, solving the technological scheme that its problem adopts is that piston and valve seat contacting point are interference fit, interference fit face is 3-5 ㎜ near one end of valve seat valve mouth and the distance in cross section, valve seat valve mouth place, avoids valve mouth; Spool and valve seat pilot hole are Spielpassung; Spool two ends are solid construction.
The utility model is simple in structure, easy to process, and manufacturing efficiency is very high; Owing to adopting valve seat valve mouth place to avoid interference portion structure, assembling press-fits up-to-standard rate 100%; Spool two ends are solid construction, and reliability improves; Spool and seat design precision reduce, and function improves, and reduce the difficulty of processing of valve seat, have guaranteed the realization of function.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated;
Fig. 1 is structural representation of the present utility model (press-fiting to the position on piston);
Fig. 2 is the structural representation of the utility model valve seat;
1 piston, 2 spools, 3 valve seats, 4 interference fit faces, 5 valve mouths, 6 pilot holes in figure.
Embodiment
As shown in the figure, piston 1 is interference fit with valve seat 3 contacting points, and interference fit face 4 is 3-5 ㎜ near one end of valve mouth 5 and the distance in valve mouth 5 cross sections, place, and the cylindrical place in cross section, valve mouth place is away from interference fit face 4, effectively avoid press-fiting distortion, guarantee valve mouth precision.Spool 2 is Spielpassung with valve seat pilot hole 6, reduces the coaxial accuracy of valve seat 3 and spool 2; Spool 2 two ends do not allow to stay center hole, are solid construction, reduce required precision, improve reliability.The 5 Vehicle Processing once-throughs of valve seat valve mouth, cut down finished cost, and improve valve mouth 5 machining accuracies.
Claims (1)
1. a bulldozer lifting oil cylinder Decompression valves, mainly be made up of piston, valve seat, spool, it is characterized in that, piston and valve seat contacting point are interference fit, interference fit face is 3-5 mm near one end of valve seat valve mouth and the distance in cross section, valve seat valve mouth place, avoids valve mouth; Spool and valve seat pilot hole are Spielpassung; Spool two ends are solid construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320886369.8U CN203627378U (en) | 2013-12-31 | 2013-12-31 | Decompression valve for lift cylinder of bulldozer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320886369.8U CN203627378U (en) | 2013-12-31 | 2013-12-31 | Decompression valve for lift cylinder of bulldozer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627378U true CN203627378U (en) | 2014-06-04 |
Family
ID=50813861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320886369.8U Expired - Lifetime CN203627378U (en) | 2013-12-31 | 2013-12-31 | Decompression valve for lift cylinder of bulldozer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203627378U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806457A (en) * | 2016-09-08 | 2018-03-16 | 湖北江山液压科技有限公司 | A kind of pressure release buffering hydraulic cylinder |
| US10738802B2 (en) | 2016-06-16 | 2020-08-11 | Qingdao Acme Innovation Technology Co., Ltd. | Hydraulic buffer and cylinder combined with the same |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
-
2013
- 2013-12-31 CN CN201320886369.8U patent/CN203627378U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10738802B2 (en) | 2016-06-16 | 2020-08-11 | Qingdao Acme Innovation Technology Co., Ltd. | Hydraulic buffer and cylinder combined with the same |
| CN107806457A (en) * | 2016-09-08 | 2018-03-16 | 湖北江山液压科技有限公司 | A kind of pressure release buffering hydraulic cylinder |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
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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: 20140604 |
|
| CX01 | Expiry of patent term |