CN204082764U - A kind of oil hydraulic cylinder with self-locking device - Google Patents
A kind of oil hydraulic cylinder with self-locking device Download PDFInfo
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- CN204082764U CN204082764U CN201420626363.1U CN201420626363U CN204082764U CN 204082764 U CN204082764 U CN 204082764U CN 201420626363 U CN201420626363 U CN 201420626363U CN 204082764 U CN204082764 U CN 204082764U
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- piston
- self
- hydraulic cylinder
- locking device
- oil hydraulic
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Abstract
The utility model discloses a kind of oil hydraulic cylinder with self-locking device, relate to hydraulic machinery technical field.Oil hydraulic cylinder with self-locking device comprises cylinder body and self-locking device, and described self-locking device comprises: first piston bar, and it is hollow closed barrel; Second piston rod, it is provided with the second piston end and is arranged in described first piston bar and is divided into Liang Ge airtight chamber, and described second piston rod free end stretches out and is fixedly held in described cylinder body; Connecting tube, it is arranged in described first piston bar along described first piston bar axial direction, and runs through described second piston; First through hole and the second through hole on the two ends sidewall of described connecting tube; The lower end of described connecting tube is provided with valve, controls described second through hole and opens or close.The utility model is by realizing oil hydraulic cylinder automatic unlocking and automatic locking to oil pressure and oil-break pressure, and without the need to external control, reliability is good, has higher usability.
Description
Technical field
The utility model relates to and belongs to hydraulic machinery technical field, particularly a kind of oil hydraulic cylinder with self-locking device.
Background technique
Oil hydraulic cylinder is executive component hydraulic energy being changed into mechanical energy.Piston-type hydraulic cylinder is made up of the part such as cylinder body, piston rod, and its good manufacturability, reliable operation, therefore have extensive use in the hydraulic system of various engineering machinery.In engineering machinery, often can need the oil hydraulic cylinder with position latch functions, realize that action locking, elevator are static, workpiece is fixed and transported and puts in place.
As long as oil hydraulic cylinder fluid is closed and does not discharge in theory, keep oil pressure in oil hydraulic cylinder, piston rod would not automatic telescopic.At present, the locking of hydraulic cylinder piston rod adopts external hydraulic control unit to realize.The hydraulic operating system that the oil hydraulic cylinder locking realizing this mode needs some supporting, mechanism is more complicated.Also have a class built-in lock locking mechanism, by closed hydraulic fluid port, keep oil pressure in cylinder to realize piston rod locking.This mode still needs peripheral operation to start lockable mechanism, also must carry out lock-off operation before oil hydraulic cylinder operation.Further, due to will oil pressure be kept, the draining being difficult to avoid must be supplemented during long-time locking in good time, to avoid mechanism action to slip up, even cause security incident.
Summary of the invention
For solving existing technical problem, the utility model provides a kind of oil hydraulic cylinder with self-locking device, only realizes hydraulic cylinder self locking by the break-make of oil supply.Technological scheme that the utility model adopts is as follows:
With an oil hydraulic cylinder for self-locking device, it is characterized in that, comprise cylinder body and the self-locking device of tubular structure; Self-locking device comprises: first piston bar, and it is hollow closed barrel, and described first piston bar is provided with first piston end and is arranged in described cylinder body cylinder body is divided into two the first airtight chamber; Second piston rod, it is provided with in described hollow closed barrel that the second piston end is arranged on described first piston bar and is divided into two the second airtight chamber, and described second piston rod free end stretches out and is fixedly held in described cylinder body; Connecting tube, it is arranged in the hollow closed barrel of described first piston bar along described first piston bar axial direction, and runs through described second piston described connecting tube; First through hole and the second through hole, it is separately positioned on the sidewall of the described connecting tube of described second piston both sides; Containing groove, its opening was arranged on described first piston towards described connecting tube.
Oil hydraulic cylinder with self-locking device also comprises: valve, and it can be arranged on up or down in described containing groove and to extend upwardly to described second through hole place, is in unlatching or closed state to make described second through hole; 3rd through hole and the 4th through hole, be spaced apart therebetween on described second piston, and described containing groove inner chamber is connected with described two the first airtight chamber by described 3rd through hole and the 4th through hole respectively, moves up and down in described containing groove to make valve.
Further, described containing groove also comprises fixing part, and it is that longitudinal section is rectangular configuration by being formed to its side walls collapse in the middle part of described containing groove.
Further, described valve also comprises: control oilhole, it is arranged on one end that described valve extended to described connecting tube, to make when valve stretches into described connecting tube extreme length, the inner chamber of described connecting tube is connected with described second chamber between first piston and the second piston by control oil pipe and described second through hole; Lug boss, it is arranged on the sidewall of described valve, and described lug boss engages with the fixing part of described containing groove, moves up and down in containing groove to make valve.
Further, on the longitudinal section of described valve, the height of described fixing part is greater than the height of described lug boss.
Further, described first piston bar inner chamber is filled with high-pressure oil gas mixture.
Further, oil hydraulic cylinder with self-locking device also comprises multiple seal ring, and it is separately positioned on the contacting point of described first piston bar and described cylinder body front end, described second piston rod and described first piston contacting point, described first piston and described inboard wall of cylinder block contacting point and the second piston and first piston bar contacting point.
Further, the oil hydraulic cylinder with self-locking device also comprises upper hydraulic fluid port and lower hydraulic fluid port, and it is separately positioned on described cylinder side wall, and is communicated to described two the first airtight chamber respectively.
Further, the oil hydraulic cylinder with self-locking device also comprises dust cap, and it is arranged on described first piston bar and extends described cylinder body place, to cut off impurity, avoids affecting hydraulic cylinder sealing performance.
Further, the oil hydraulic cylinder with self-locking device also comprises two hinging holes, and it is separately positioned on described first piston bar and extends one end of described cylinder body and the other end of described cylinder body.
Further, the inside of described hinging hole is provided with bearing, ensures to have good pivot joint between oil hydraulic cylinder and bindiny mechanism, makes action executing smooth and easy, extends oil hydraulic cylinder working life.
The utility model realizes the automatic locking of piston-type hydraulic cylinder, and working principle is as follows: be full of high-pressure oil gas mixture in first piston bar, and the high pressure of two the second airtight chamber is all to the second piston generation active force in opposite directions of the second piston rod end.When two the second airtight chamber are not communicated with, if when applied external force is constant, after the second piston rod stress balance, can not there is relative change in the volume of two the second airtight chamber, now the second piston rod is by locking.
Oil hydraulic cylinder not fuel feeding time, valve is released by the high pressure in first piston bar, second through hole closes, two the second airtight chamber cut off, the active force that second piston of high pressure to the second piston rod end of its inside applies needs balance, then the second piston rod can not move freely, thus realizes first piston bar automatic locking.When oil hydraulic cylinder needs action, the oil pressure first jack-up valve of supply oil hydraulic cylinder, two the second airtight chamber are connected, and relative change can occur its volume, and namely the second piston can move freely, and now, oil hydraulic cylinder unlocks, and first piston bar is free action under oil pressure effect.
Compared with the prior art comparatively, the utility model has outstanding beneficial effect: the utility model realizes the automatic locking of oil hydraulic cylinder, does not rely on maintenance medium pressure to ensure oil hydraulic cylinder state, also without any need for external control devices, there is higher usability, broaden application scope.The utility model is satisfied the demand the engineering machinery hydraulic cylinder service condition of locking, and also the routine of alternative existing oil hydraulic cylinder uses, the mechanism action imbalance caused after avoiding unexpected oil-break.
Accompanying drawing explanation
Fig. 1 is the structural representation with the oil hydraulic cylinder of self-locking device in the utility model.
Fig. 2 is the structural representation that the second through hole in the utility model after oil hydraulic cylinder partial enlargement is opened.
Fig. 3 is the structural representation that the second through hole in the utility model after oil hydraulic cylinder partial enlargement is closed.
Embodiment
Below in conjunction with accompanying drawing, the oil hydraulic cylinder with self-locking device in the utility model is described further:
As shown in Figure 1, the cylinder body (2) of tubular structure is comprised with the oil hydraulic cylinder of self-locking device; Cylinder body (2) lower end is provided with hinging hole (7), is provided with bearing (8) in hinging hole (7); The front end of cylinder body (2) is provided with dust cap (1).First piston bar (3) is through dust cap (1) and to extend to cylinder body (2) inner; First piston bar is provided with hinging hole (7) equally in the one end in cylinder body (2) outside, and the inside of hinging hole is provided with bearing (8).
First piston bar (3) bottom is provided with first piston (6), and cylinder body (2) is divided into two the first airtight chamber.Cylinder body (2) sidewall is respectively arranged with hydraulic fluid port under upper hydraulic fluid port (11) and lower hydraulic fluid port (15), its respectively correspondence be communicated to two the first airtight chamber.
First piston bar (3) hollow, two ends close, and form the cavity of airtight tubular.Also be provided with the second piston rod (4) in oil hydraulic cylinder, its one end is fixed on the inner bottom part of cylinder body (2), and the other end extends in the closed cavity of first piston bar (3); And having the second piston (12) in end, is two the second airtight chamber by piston rod (3) interior separation.Connecting tube (5) is provided with in first piston bar (3), it runs through the second piston, be fixed on the two ends that first piston bar (3) is inner, and near two ends side offer the first through hole (9) and the second through hole (13) respectively, make two the second airtight chamber can conducting.
The inner chamber of first piston bar (3), comprises in two the second airtight chamber and connecting tube (5) and is all filled with high-pressure oil gas mixture.
As shown in accompanying drawing 2 and accompanying drawing 3, first piston (6) is provided with containing groove (16), and its opening towards connecting tube (5), and forms fixing part (19) to its side walls collapse in the middle part of containing groove.The valve (14) be provided with in containing groove (16), it extends upwardly to the second through hole place (13), can move up and down, to control the second through hole opening and closing (13).
Valve (14) is offered in the one end extended to connecting tube (5) and is controlled oilhole (18), make when valve (14) stretches into connecting tube (5), the inner chamber of connecting tube (5) is connected with the second chamber with the second through hole (13) by control oil pipe (18).The sidewall of valve (14) has lug boss (20), and it engages with the fixing part (19) of containing groove (16); On longitudinal section, the height of fixing part (19) is greater than the height of lug boss (20), moves up and down in containing groove (16) to make valve (14).
First piston (6) is also provided with the 3rd through hole (17) and the 4th through hole (21), containing groove inner chamber is connected with two the first airtight chamber by respectively.
Oil hydraulic cylinder is provided with multiple seal ring (10), comprises the contacting point, front end of first piston bar (3) and cylinder body (2), the second piston rod (4) and first piston (6) contacting point, the contact internal walls place of first piston (6) and cylinder body (2) and the second piston (12) and first piston bar (3) contact internal walls place etc.
The self-locking principle of oil hydraulic cylinder:
Because the second piston rod (4) is fixed on cylinder body (2), when the second piston rod (4) can not be free to slide relative to first piston bar (3), be equivalent to first piston bar (3) by locking.When two the second airtight chamber are not communicated with, there is not relative change in its volume, and namely the second piston rod (4) is relative fixing with first piston bar (3), and now first piston bar (3) is by locking; Corresponding, when two the second airtight chamber are communicated with, first piston bar (3) unlocks, can free action.
Pressure due to the hydraulic oil pumping into oil hydraulic cylinder is greater than the pressure that gas mixture produces, so when oiling valve (14) by jack-up, two the second airtight chamber are by connecting tube (5) conducting, can be there is relative change in its volume, thus now first piston bar (3) can free action.After oil-break, outside oil pressure is eliminated, valve (14) is released by the high pressure of the gas mixture in first piston bar (3), second through hole (13) is closed, connecting tube (5) can not conducting two the second airtight chamber, and first piston bar (3) is by locking.
The routine of the alternative existing oil hydraulic cylinder of the oil hydraulic cylinder with self-locking device uses, as at the jib of routine at pump truck, or in the engineering machinery such as excavator jib, when causing unexpected oil-break due to reasons such as mechanical failures, oil hydraulic cylinder is automatic locking immediately, prevents mechanism action from lacking of proper care, avoids accident.
To satisfy the demand with the oil hydraulic cylinder of self-locking device the engineering machinery hydraulic cylinder service condition of locking simultaneously.If needs oil hydraulic cylinder is in situations such as certain position lock for a long time, continues fuel feeding power consumption large, also produce noise etc.Namely airframe hatch door is handled needs to use this kind of oil hydraulic cylinder.Use the oil hydraulic cylinder with self-locking device, after action executing to precalculated position, get final product emptying, oil hydraulic cylinder automatically locks position; When need change state, DFF Direct Fuel Feed can unlock.
The utility model passes through can realize oil hydraulic cylinder automatic unlocking and automatic locking to oil pressure and oil-break pressure with the oil hydraulic cylinder of self-locking device, do not rely on maintenance medium pressure to ensure oil hydraulic cylinder state, also without any need for external control devices, reliability is good, has higher usability.
More than describe just embodiment of the present utility model, respectively illustrate and be not construed as limiting flesh and blood of the present utility model, person of ordinary skill in the field makes an amendment aforesaid embodiment or is out of shape, and does not deviate from essence of the present utility model.
Claims (10)
1. with an oil hydraulic cylinder for self-locking device, it is characterized in that, comprising:
Cylinder body, it is for there being tubular structure;
Self-locking device, it comprises: first piston bar, and it is hollow closed barrel, and described first piston bar is provided with first piston end and is arranged in described cylinder body cylinder body is divided into two the first airtight chamber; Second piston rod, it is provided with in described hollow closed barrel that the second piston end is arranged on described first piston bar and is divided into two the second airtight chamber, and described second piston rod free end stretches out and is fixedly held in described cylinder body; Connecting tube, it is arranged in the hollow closed barrel of described first piston bar along described first piston bar axial direction, and runs through described second piston described connecting tube; First through hole and the second through hole, it is separately positioned on the sidewall of the described connecting tube of described second piston both sides; Containing groove, its opening is towards being arranged on described connecting tube on described first piston;
Valve, it can be arranged on up or down in described containing groove and to extend upwardly to described second through hole place, is in unlatching or closed state to make described second through hole;
3rd through hole and the 4th through hole, be spaced apart therebetween on described second piston, and described containing groove inner chamber is connected with described two the first airtight chamber by described 3rd through hole and the 4th through hole respectively, moves up and down in described containing groove to make valve.
2. as claimed in claim 1 with the oil hydraulic cylinder of self-locking device, it is characterized in that, described containing groove also comprises: fixing part, and it is that longitudinal section is rectangular configuration by being formed to its side walls collapse in the middle part of described containing groove.
3., as claimed in claim 2 with the oil hydraulic cylinder of self-locking device, it is characterized in that, described valve also comprises:
Control oilhole, it is arranged on one end that described valve extended to described connecting tube, to make when valve stretches into described connecting tube extreme length, the inner chamber of described connecting tube is connected with described second airtight chamber between first piston and the second piston by control oil pipe and described second through hole;
Lug boss, it is arranged on the sidewall of described valve, and described lug boss engages with the fixing part of described containing groove, moves up and down in containing groove to make valve.
4., as claimed in claim 3 with the oil hydraulic cylinder of self-locking device, it is characterized in that, on the longitudinal section of described valve, the height of described fixing part is greater than the height of described lug boss.
5., as claimed in claim 1 with the oil hydraulic cylinder of self-locking device, it is characterized in that, in the hollow closed barrel of described first piston bar, be filled with high-pressure oil gas mixture.
6. as claimed in claim 1 with the oil hydraulic cylinder of self-locking device, it is characterized in that, also comprise: multiple seal ring, it is separately positioned on the contacting point of described first piston bar and described cylinder body front end, described second piston rod and described first piston contacting point, described first piston and described inboard wall of cylinder block contacting point and the second piston and first piston bar contacting point.
7. as claimed in claim 1 with the oil hydraulic cylinder of self-locking device, it is characterized in that, also comprise: upper hydraulic fluid port and lower hydraulic fluid port, it is separately positioned on described cylinder side wall, and is communicated to described two the first airtight chamber respectively.
8., as claimed in claim 1 with the oil hydraulic cylinder of self-locking device, it is characterized in that, also comprise: dust cap, it is arranged on described first piston bar and extends described cylinder body place.
9., as claimed in claim 1 with the oil hydraulic cylinder of self-locking device, it is characterized in that, also comprise: two hinging holes, it is separately positioned on described first piston bar and extends one end of described cylinder body and the other end of described cylinder body.
10., as claimed in claim 9 with the oil hydraulic cylinder of self-locking device, it is characterized in that, also comprise bearing, it is arranged in described hinging hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420626363.1U CN204082764U (en) | 2014-10-27 | 2014-10-27 | A kind of oil hydraulic cylinder with self-locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420626363.1U CN204082764U (en) | 2014-10-27 | 2014-10-27 | A kind of oil hydraulic cylinder with self-locking device |
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| Publication Number | Publication Date |
|---|---|
| CN204082764U true CN204082764U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420626363.1U Expired - Fee Related CN204082764U (en) | 2014-10-27 | 2014-10-27 | A kind of oil hydraulic cylinder with self-locking device |
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| Country | Link |
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| CN (1) | CN204082764U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265731A (en) * | 2014-10-27 | 2015-01-07 | 广西睿源科技有限公司 | Hydraulic cylinder with self-locking device |
-
2014
- 2014-10-27 CN CN201420626363.1U patent/CN204082764U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265731A (en) * | 2014-10-27 | 2015-01-07 | 广西睿源科技有限公司 | Hydraulic cylinder with self-locking device |
| CN104265731B (en) * | 2014-10-27 | 2017-01-11 | 宁波远志立方能源科技有限公司 | Hydraulic cylinder with self-locking device |
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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: 20150107 Termination date: 20151027 |
|
| EXPY | Termination of patent right or utility model |