CN204533029U - Bidirectional self-locking oil hydraulic cylinder - Google Patents
Bidirectional self-locking oil hydraulic cylinder Download PDFInfo
- Publication number
- CN204533029U CN204533029U CN201520001867.9U CN201520001867U CN204533029U CN 204533029 U CN204533029 U CN 204533029U CN 201520001867 U CN201520001867 U CN 201520001867U CN 204533029 U CN204533029 U CN 204533029U
- Authority
- CN
- China
- Prior art keywords
- oil duct
- oil
- rodless cavity
- rod chamber
- hydraulic cylinder
- 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 - Fee Related
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Abstract
The utility model discloses a kind of bidirectional self-locking oil hydraulic cylinder, rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port are disposed side by side on front end housing, the go side end face of a pair one-way valve is relatively fixed on the two ends of horizontal oil duct, and horizontal oil duct two ends are separated into rod chamber oil duct and rodless cavity oil duct by the separation spool in middle cross-drilled hole.Oil pipe one end is fixed on front end housing side and communicates with the rodless cavity oil duct in front end housing, and the other end is fixedly connected with cylinder bottom side and communicates with rodless cavity, and rod chamber oil duct communicates with rod chamber.The utility model compact structure, be convenient to install, improve installation and maintenance efficiency.By separating spool, a pair one-way valve is transformed into a pair Pilot operated check valve, when making to cut off oil-feed to oil hydraulic cylinder, the lock piston bar because of a pair closed check valve, guarantees the use safety of oil hydraulic cylinder.The utility model improves piston rod locking and the sensitivity unlocked, and extends the working life of oil hydraulic cylinder.
Description
Technical field
The utility model relates to a kind of double-acting hydraulic cylinder, and especially a kind of double-acting hydraulic cylinder that can pin piston rod in the arbitrary position of hydraulic cylinder travel, belongs to technical field of hydraulic pressure.
Background technique
The advantages such as double-acting hydraulic cylinder has compact structure, High power output, inertia is little, speed governing is convenient, overload protection, are widely used in all kinds of machinery, engineering machinery and farm machinery.Lifting hydraulic cylinder is usually used in raising weight, as the supporting cylinder of crane arm, loader or the moved arm lifting oil hydraulic cylinder of excavator or the rear-mounted facility lifting hydraulic cylinder etc. of tractor, this type of oil hydraulic cylinder is in operation or when travelling, the piston rod of oil hydraulic cylinder needs to remain on the state reaching a certain position, therefore, need a kind of oil hydraulic cylinder possessing self-lock ability could meet above-mentioned functions needs, guarantee safe handling.The existing pattern with the oil hydraulic cylinder of auto-lock function is as follows: set up a little cylinder of locking in the axis of the front end housing of oil hydraulic cylinder, piston rod is set up a position limit socket, when oil hydraulic cylinder backhaul is to desired position, position limit socket promotes the little cylinder piston rod of locking and retreats confining liquid cylinder pressure rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port, and the piston rod of oil hydraulic cylinder is locked in required position.The oil hydraulic cylinder complex operation of this structure, hydraulic lifting position is difficult to control, and there is potential safety hazard.Often complete a self-locking to be equivalent to the little cylinder piston of locking and to ressemble once simultaneously, affect the working life of Glais ring on piston; Small piston part exposes in atmosphere, is vulnerable to oxidation corrosion of etc.ing, shortening locking little cylinder working life, thus the working life of shortening oil hydraulic cylinder.
Model utility content
The purpose of this utility model overcomes the deficiencies in the prior art, provides the bidirectional self-locking oil hydraulic cylinder of a kind of self-locking device integral installation in front end housing.
The utility model is achieved by the following technical programs:
A kind of bidirectional self-locking oil hydraulic cylinder, comprise the cylinder bottom of band hinge ear, cylinder barrel, piston, piston rod and front end housing, cylinder barrel two ends are fixedly connected with front end housing with cylinder bottom respectively, the piston be arranged in cylinder barrel is fixedly connected with piston rod one end, the piston rod the other end stretches out front end housing, and the inner cavity of cylinder of piston both sides is respectively rod chamber and rodless cavity; Rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port are disposed side by side on front end housing, and rod chamber hydraulic fluid port lower end and rodless cavity hydraulic fluid port lower end are vertical with the horizontal oil duct traversing front end housing respectively to communicate; The go side end face of a pair one-way valve is relatively fixed on the two ends of horizontal oil duct, is provided with middle cross-drilled hole in the middle part of described horizontal oil duct, and horizontal oil duct two ends are separated into rod chamber oil duct and rodless cavity oil duct by the separation spool be arranged in middle cross-drilled hole; Oil pipe one end is fixed on front end housing side and is communicated with the rodless cavity oil duct in front end housing by front end housing oil duct, and the oil pipe the other end is fixedly connected with cylinder bottom side and is communicated with rodless cavity by cylinder bottom oil duct, and rod chamber oil duct communicates with rod chamber.
The purpose of this utility model can also be realized further by following technical measures.
Aforesaid bidirectional self-locking oil hydraulic cylinder, wherein said one-way valve comprises valve seat, movable spool, stage clip and press spring base, described valve seat is fixed on termination, horizontal oil duct one end, press spring base is fixed in valve seat outer end, movable spool is inlaid in valve seat movably, stage clip is supported between press spring base cavity and movable spool cavity, and movable spool frustum outer end is resisted against on valve seat through-hole step.
Aforesaid bidirectional self-locking oil hydraulic cylinder, wherein the valve seat cross-drilled hole two ends of one-way valve communicate with corresponding rod chamber oil duct or rodless cavity oil duct respectively.
Aforesaid bidirectional self-locking oil hydraulic cylinder, wherein separate center, spool two ends and extend frizzen respectively, two frizzen terminations are relative with the movable spool frustum outer end of rod chamber one-way valve of oil duct or the movable spool frustum outer end end face of rodless cavity one-way valve of oil duct respectively.The gap of separating between spool cylindrical and middle cross-drilled hole is 0.008 ~ 0.016mm.
Rod chamber hydraulic fluid port of the present utility model and rodless cavity hydraulic fluid port are disposed side by side on front end housing, compact structure, be convenient to install, improve installation and maintenance efficiency.The utility model is provided with the relative one-way valve of a pair go side end face at the horizontal oil duct two ends of front end housing, and in the middle cross-drilled hole of front end housing, be provided with the separation spool having and cut off rod chamber oil duct and rodless cavity oil duct function cleverly, a pair one-way valve is transformed into a pair Pilot operated check valve.Pressure oil enters rod chamber hydraulic fluid port or the rodless cavity hydraulic fluid port of front end housing during by selector valve, promote to separate spool to move to opposite side, the corresponding movable spool frustum of one-way valve is backed down by the frizzen separating spool one end, thus the rod chamber of oil hydraulic cylinder and rodless cavity are all communicated with corresponding oil duct, piston rod moves; When piston rod moves to the position of setting, meta changed to by selector valve, cut off the rod chamber of oil hydraulic cylinder or the oil-feed of rodless cavity, now, the one-way valve at the horizontal oil duct two ends of front end housing is all in closed condition, to separate spool forced back near the movable spool frustum separating spool one end one-way valve by frizzen, piston rod is locked in the position of setting.The utility model improves piston rod locking and the sensitivity unlocked, and extends the working life of oil hydraulic cylinder.The burst accident avoiding generation piston rod to retract suddenly, guarantees the use safety of the oil hydraulic cylinder moving up and down piston rod.
Advantage and disadvantage of the present utility model, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below, these embodiments, only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the A-A cutaway view Amplified image of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing with for the lift cylinder embodiment of tractor rear-mounted implement lift, the utility model is described in further detail.
As Fig. 1 and as shown in Figure 2, the present embodiment comprises cylinder bottom 1, cylinder barrel 2, piston 3, piston rod 4 and the front end housing 5 of being with hinge ear, cylinder barrel 2 two ends are welded and fixed with cylinder bottom 1 and front end housing 5 respectively, the piston 3 be arranged in cylinder barrel 2 is fixedly connected with by nut 6 with piston rod left end, piston rod 4 right-hand member stretches out front end housing 5, inner cavity of cylinder on the left of piston 3 is rodless cavity 21, and right side is rod chamber 22.
Rod chamber hydraulic fluid port 51 on the upside of front end housing 5 and rodless cavity hydraulic fluid port 52 are arranged side by side, rod chamber hydraulic fluid port 51 lower end is communicated with the horizontal oil duct 53 traversing front end housing 5 is vertical by the vertical oil duct of rodless cavity 521 respectively by the vertical oil duct of rod chamber 511, rodless cavity hydraulic fluid port 52 lower end, and the go side end face of a pair one-way valve 6 is relatively fixed on horizontal oil duct 53 two ends.One-way valve 6 comprises valve seat 61, movable spool 62, stage clip 63 and press spring base 64, valve seat 61 is threaded connection the right-hand member or left end termination that are fixed on horizontal oil duct 53, press spring base 64 is threaded connection and is fixed in valve seat 61 outer end, movable spool 62 is inlaid in the step-like valve seat through-hole 611 of valve seat 61, stage clip 63 is supported between the press spring base cavity 641 of indent and the movable spool cavity 621 of indent, under the effect of stage clip 63 elastic force, movable spool frustum 622 outer end is resisted against closing one-way valve 6 on valve seat through-hole 611 step.
The middle cross-drilled hole 531 that diameter is less than horizontal oil duct 53 diameter is provided with in the middle part of horizontal oil duct 53, horizontal oil duct 53 two ends are separated into the rod chamber oil duct 532 of right-hand member and the rodless cavity oil duct 533 of left end by the separation spool 7 be arranged in middle cross-drilled hole 531, middle cross-drilled hole 531 right-hand member communicates with rod chamber oil duct 532, and left end communicates with rodless cavity oil duct 533.Separate center, spool about 7 two ends and extend frizzen 71 respectively, two frizzen 71 terminations, left and right are relative with the movable spool frustum 622 outer end end face of movable spool frustum 622 outer end of rod chamber oil duct 532 one-way valve 6 or the one-way valve 6 of rodless cavity oil duct respectively, when separation spool 7 moves under pressure oil effect in middle cross-drilled hole 531, its frizzen 71 just can back down corresponding movable spool frustum 622 respectively, get through corresponding oil duct, make pressure oil enter rodless cavity 21 or rod chamber 22, promote piston rod 4 and move.The gap of separating between spool 7 cylindrical and middle cross-drilled hole is 0.008 ~ 0.016mm, and such gap can guarantee that separating spool 7 can move left and right in middle cross-drilled hole 531, can separate again rod chamber oil duct 532 and rodless cavity oil duct 533.Even if there is the seepage of trace, the leakage of oil of trace can be stored in the oil storage annular groove 72 separated in the middle part of spool 7, rod chamber oil duct 532 and rodless cavity oil duct 533 can not occur and go here and there the phenomenon of oil.Valve seat cross-drilled hole 612 two ends of one-way valve 6 communicate with corresponding rod chamber oil duct 532 or rodless cavity oil duct 533 respectively, guarantee that the pressure oil inputted from rod chamber hydraulic fluid port 51 or rodless cavity hydraulic fluid port 52 can enter corresponding rodless cavity 21 or rod chamber 22, promote piston rod 4 and move.
Oil pipe 8 right-hand member to be weldingly fixed on the left of front end housing 5 and to be communicated with the rodless cavity oil duct 533 in front end housing by the left oil duct 54 of front end housing, oil pipe 8 left end be welded and fixed on the upside of cylinder bottom 1 and communicated with rodless cavity 21 by cylinder bottom oil duct 11, rod chamber oil duct 532 is communicated with rod chamber 22 by the right oil duct 55 of front end housing.
In addition to the implementation, the utility model can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (5)
1. a bidirectional self-locking oil hydraulic cylinder, comprise the cylinder bottom of band hinge ear, cylinder barrel, piston, piston rod and front end housing, cylinder barrel two ends are fixedly connected with front end housing with cylinder bottom respectively, the piston be arranged in cylinder barrel is fixedly connected with piston rod one end, the piston rod the other end stretches out front end housing, and the inner cavity of cylinder of piston both sides is respectively rod chamber and rodless cavity; It is characterized in that: rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port are disposed side by side on front end housing, rod chamber hydraulic fluid port lower end and rodless cavity hydraulic fluid port lower end are vertical with the horizontal oil duct traversing front end housing respectively to communicate; The go side end face of a pair one-way valve is relatively fixed on the two ends of horizontal oil duct, is provided with middle cross-drilled hole in the middle part of described horizontal oil duct, and horizontal oil duct two ends are separated into rod chamber oil duct and rodless cavity oil duct by the separation spool be arranged in middle cross-drilled hole; Oil pipe one end is fixed on front end housing side and is communicated with the rodless cavity oil duct in front end housing by front end housing oil duct, and the oil pipe the other end is fixedly connected with cylinder bottom side and is communicated with rodless cavity by cylinder bottom oil duct, and rod chamber oil duct communicates with rod chamber.
2. bidirectional self-locking oil hydraulic cylinder as claimed in claim 1, it is characterized in that: described one-way valve comprises valve seat, movable spool, stage clip and press spring base, described valve seat is fixed on termination, horizontal oil duct one end, press spring base is fixed in valve seat outer end, movable spool is inlaid in valve seat movably, stage clip is supported between press spring base cavity and movable spool cavity, and movable spool frustum outer end is resisted against on valve seat through-hole step.
3. bidirectional self-locking oil hydraulic cylinder as claimed in claim 2, is characterized in that: the valve seat cross-drilled hole two ends of one-way valve communicate with corresponding rod chamber oil duct or rodless cavity oil duct respectively.
4. bidirectional self-locking oil hydraulic cylinder as claimed in claim 1, it is characterized in that: separate center, spool two ends and extend frizzen respectively, two frizzen terminations are relative with the movable spool frustum outer end of rod chamber one-way valve of oil duct or the movable spool frustum outer end end face of rodless cavity one-way valve of oil duct respectively.
5. bidirectional self-locking oil hydraulic cylinder as claimed in claim 1, is characterized in that: the gap of separating between spool cylindrical and middle cross-drilled hole is 0.008 ~ 0.016mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520001867.9U CN204533029U (en) | 2015-01-05 | 2015-01-05 | Bidirectional self-locking oil hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520001867.9U CN204533029U (en) | 2015-01-05 | 2015-01-05 | Bidirectional self-locking oil hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204533029U true CN204533029U (en) | 2015-08-05 |
Family
ID=53747038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520001867.9U Expired - Fee Related CN204533029U (en) | 2015-01-05 | 2015-01-05 | Bidirectional self-locking oil hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204533029U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533873A (en) * | 2015-01-05 | 2015-04-22 | 江苏真绩机械制造有限公司 | Two-way self-locking hydraulic cylinder |
| CN106499691A (en) * | 2015-09-08 | 2017-03-15 | 卢西亚诺特林达德·德·索萨蒙泰罗 | For actuating the locking system of cylinder and actuating cylinder |
-
2015
- 2015-01-05 CN CN201520001867.9U patent/CN204533029U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533873A (en) * | 2015-01-05 | 2015-04-22 | 江苏真绩机械制造有限公司 | Two-way self-locking hydraulic cylinder |
| CN106499691A (en) * | 2015-09-08 | 2017-03-15 | 卢西亚诺特林达德·德·索萨蒙泰罗 | For actuating the locking system of cylinder and actuating cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160105 |