CN201407227Y - Mechanical self-locking hydraulic cylinder - Google Patents
Mechanical self-locking hydraulic cylinder Download PDFInfo
- Publication number
- CN201407227Y CN201407227Y CN2009200442590U CN200920044259U CN201407227Y CN 201407227 Y CN201407227 Y CN 201407227Y CN 2009200442590 U CN2009200442590 U CN 2009200442590U CN 200920044259 U CN200920044259 U CN 200920044259U CN 201407227 Y CN201407227 Y CN 201407227Y
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- lock
- piston
- cylinder body
- fork
- entad
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Abstract
A mechanical self-locking hydraulic cylinder comprises a cylinder body (1), a piston (2) and a piston rod (3); the cylinder body (1) is divided into a rod cavity and a rodless cavity; the mechanical self-locking hydraulic cylinder is characterized in that a lock holder (4) is mounted in the rodless cavity, the lock holder (4) is nested on a guide sleeve (5), the guide sleeve (5) is fixedly mountedin the cylinder body (1), a spring with one end thereof supported on the lock holder (4) is mounted in the guide sleeve (5), the other end of the spring (6) is supported on the wall of the cylinder body or the base of the guide sleeve (5), a step (8) matched with the inner cylindrical surface on one end of an elastic centripetal fork-shaped lock sleeve (7) with an conical end part is arranged onthe outer surface of the lock holder (4), the other end of the centripetal fork-shaped lock sleeve (7) is connected with the piston capable of driving the centripetal forked-shaped lock sleeve to move, the outer conical step surface of the centripetal forked-shaped lock sleeve (7) is supported on the inner conical step surface of an outer lock ring (9), and the outer lock ring (9) is fixed in thecylinder body (1). The mechanical self-locking hydraulic cylinder has simple structure, is safe, reliable and can completely replace the hydraulic lock or can be used together with the hydraulic lockto realize double fail-safe.
Description
Technical field
The utility model relates to a kind of component of machine, especially a kind of hydraulic jack, and commonly used being used to makes component remain on the mechanical self-locking hydraulic cylinder of a certain state in specifically a kind of main equipment.
Background technique
As everyone knows, in many machinery,, after the Hydraulic Power Transmission System power cut-off, need to regain fully and stop reliably for a long time on its recovery position as hoist, press machine etc.During this period, consider that the mechanism that requires oil hydraulic cylinder to drive remains on original position can not any moving from security standpoint.Way in the past is that Pilot operated check valve of serial connection stops the displacement of hydraulic cylinder piston rod as hydraulic lock in the return line of oil hydraulic cylinder, makes mechanism remain on the purpose of original position to reach.
This locking method exists obviously not enough: because hydraulic lock (Pilot operated check valve) in fact can not accomplish to seal fully in use for some time, more or less have some leakages, so mechanism also more or less can some skew.The endurance of system's stop state is longer, and side-play amount just more greatly.Therefore,, only rely on hydraulic lock (Pilot operated check valve) to realize the locking and the location of system, can not meet the demands for the workplace that device security is had strict demand.
Summary of the invention
The purpose of this utility model is the problem that can't guarantee the work of oil hydraulic cylinder long-term safety at existing hydraulic lock, designs the reliable mechanical self-locking hydraulic cylinder of a kind of locking.
The technical solution of the utility model is:
A kind of mechanical self-locking hydraulic cylinder, comprise cylinder body 1, piston 2 and piston rod 3, piston 2 is installed in the cylinder body 1, one end of piston rod 3 links to each other with piston 2, the other end of piston rod 2 stretches out outside the cylinder body 1, piston 2 is divided into rod chamber and rodless cavity with cylinder body 1, described rod chamber and rodless cavity are equipped with the opening of corresponding turnover hydraulic oil, it is characterized in that being equipped with in the described rodless cavity lock 4, lock 4 is sleeved on the guide pin bushing 5, guide pin bushing 5 is fixedly mounted in the cylinder body 1, the spring 6 that one end and lock 4 offset is installed in the guide pin bushing 5, the base of the other end of spring 6 and cylinder wall or guide pin bushing 5 offsets, the outer surface of lock 4 is provided with and the elasticity of the head band taper step 8 that matches of the inner cylindrical surface of fork-shaped lock tube 7 one ends entad, entad the other end of fork-shaped lock tube 7 links to each other with its piston that moves 2 of drive, and entad the inner conical step surface of the external conical shape step surface of fork-shaped lock tube 7 and outer lock rings 9 offsets, and outer lock rings 9 is fixed in the cylinder body 1.
Described step 8 is provided with annular groove, and inner lock rings 10 is installed in the described annular groove, and the outer surface of inner lock rings 10 matches with the inner cylindrical surface of entad diverging lock tube 7.
Described entad fork-shaped lock tube 7 has two compositions at least.
The beneficial effects of the utility model:
The utility model relies on mechanical structure to realize self-locking from according to a difficult problem that has solved needs such as shear leg, press machine dependence hydraulic lock hold mode fully, can keep for a long time in case lock, can be because of former thereby inefficacies such as leakages.
The utility model is simple in structure, and is safe and reliable, can replace hydraulic lock fully, also can use simultaneously with hydraulic lock, realizes dual fail-safe.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1.
A kind of mechanical self-locking hydraulic cylinder, comprise cylinder body 1, piston 2 and piston rod 3, piston 2 is installed in the cylinder body 1, one end of piston rod 3 links to each other with piston 2, the other end of piston rod 2 stretches out outside the cylinder body 1, piston 2 is divided into rod chamber and rodless cavity with cylinder body 1, described rod chamber and rodless cavity are equipped with the opening (seeing B mouth and A mouth among Fig. 1) of corresponding turnover hydraulic oil, lock 4 is installed in the described rodless cavity, lock 4 is sleeved on the guide pin bushing 5, guide pin bushing 5 is fixedly mounted in the cylinder body 1, the spring 6 that one end and lock 4 offset is installed in the guide pin bushing 5, the base of the other end of spring 6 and cylinder wall or guide pin bushing 5 offsets, the outer surface of lock 4 is provided with and the elasticity of the head band taper step 8 that matches of the inner cylindrical surface of fork-shaped lock tube 7 one ends entad, step 8 can be with lock 4 are unitary whole formula structures, also can form by groove and the inner lock rings 10 that is installed in the groove, the outer surface of inner lock rings 10 matches with the inner cylindrical surface of fork-shaped lock tube 7 entad, entad the other end of fork-shaped lock tube 7 links to each other with its piston that moves 2 of drive, entad the inner conical step surface of the external conical shape step surface of fork-shaped lock tube 7 and outer lock rings 9 offsets, outer lock rings 9 is fixed in the cylinder body 1, during concrete enforcement entad fork-shaped lock tube 7 by being two chip architectures, also can be 3,4, structure more than 5 and 5, will be entad fork-shaped lock tube 7 to be designed to sheet structure be to shrink or open for it can be out of shape.
Working principle of the present utility model is:
When oil hydraulic cylinder reclaimed, pressure oil (also can be water or other medium) entered rod chamber from the B mouth, promoted piston 2 and return.When piston 2 is about to rollback and will put in place, the elasticity of head band taper entad fork-shaped lock tube 7 is passed through outer lock rings 9 inside trumpet mouths, when putting in place entad the inner cylindrical surface of fork-shaped lock tube 7 match with inner lock rings 10 on being fixed on lock 4, and inclined-plane seam face is realized mechanical positioning locking near the inner conical surface of outer lock rings 9.When system starts working, when needing piston rod 3 to stretch out, pressure oil enters rodless cavity from the A mouth, promotes the elastic force that lock 4 overcomes spring 6 on the one hand and moves to afterbody, and inner lock rings 10 and fork-shaped lock tube 7 are entad disengaged; Promote piston on the other hand and connect 3 and travel forward with fixed entad fork-shaped lock tube 7 thereon, entad fork-shaped lock tube 7 inclined-plane seams are subjected to the effect of the inner conical surface of outer lock rings 9, produce an entad component.This moment, so entad fork-shaped lock tube 7 can entad shrink, final and outer lock rings 9 disengaged, thereby realizes release because inner lock rings 10 breaks away from it.
The leveling oil hydraulic cylinder of being furnished with this mechanical self-latching mechanism, fine through test run effect on the car hoisting apparatus, leaving standstill the actual measurement of having a surplus January any displacement does not take place.As this mechanism is generalized to the Hoisting Machinery landing leg hydraulic cylinder, on the equipment such as large tonnage pressing machine, hydraulic elevating platform, the Security and the reliability of these equipment will be strengthened greatly.
The utility model can use separately during concrete enforcement, also can with the supporting use of existing hydraulic lock, realize dual fail-safe, therefore, it both can be used in the new oil cylinder, also can be used for existing oil cylinder is transformed.
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.
Claims (3)
1, a kind of mechanical self-locking hydraulic cylinder, comprise cylinder body (1), piston (2) and piston rod (3), piston (2) is installed in the cylinder body (1), one end of piston rod (3) links to each other with piston (2), the other end of piston rod (2) stretches out outside the cylinder body (1), piston (2) is divided into rod chamber and rodless cavity with cylinder body (1), described rod chamber and rodless cavity are equipped with the opening of corresponding turnover hydraulic oil, it is characterized in that being equipped with in the described rodless cavity lock (4), lock (4) is sleeved on the guide pin bushing (5), guide pin bushing (5) is fixedly mounted in the cylinder body (1), the spring (6) that one end and lock (4) offset is installed in the guide pin bushing (5), the base of the other end of spring (6) and cylinder wall or guide pin bushing (5) offsets, the outer surface of lock (4) is provided with and the elasticity of the head band taper step (8) that matches of the inner cylindrical surface of fork-shaped lock tube (7) one ends entad, entad the other end of fork-shaped lock tube (7) links to each other with its piston that moves (2) of drive, entad the inner conical step surface of the external conical shape step surface of fork-shaped lock tube (7) and outer lock rings (9) offsets, and outer lock rings (9) is fixed in the cylinder body (1).
2, mechanical self-locking hydraulic cylinder according to claim 1, it is characterized in that described step (8) is provided with annular groove, inner lock rings (10) is installed in the described annular groove, and the outer surface of inner lock rings (10) matches with the inner cylindrical surface of entad diverging lock tube (7).
3,, it is characterized in that described entad fork-shaped lock tube (7) has two compositions at least according to claim 1 mechanical self-locking hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200442590U CN201407227Y (en) | 2009-06-08 | 2009-06-08 | Mechanical self-locking hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200442590U CN201407227Y (en) | 2009-06-08 | 2009-06-08 | Mechanical self-locking hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201407227Y true CN201407227Y (en) | 2010-02-17 |
Family
ID=41678161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200442590U Expired - Fee Related CN201407227Y (en) | 2009-06-08 | 2009-06-08 | Mechanical self-locking hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201407227Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367823A (en) * | 2011-11-03 | 2012-03-07 | 中航飞机起落架有限责任公司 | Automatically reversible air cylinder device with built-in mechanical lock |
-
2009
- 2009-06-08 CN CN2009200442590U patent/CN201407227Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367823A (en) * | 2011-11-03 | 2012-03-07 | 中航飞机起落架有限责任公司 | Automatically reversible air cylinder device with built-in mechanical lock |
| CN102367823B (en) * | 2011-11-03 | 2014-05-28 | 中航飞机起落架有限责任公司 | Automatically reversible air cylinder device with built-in mechanical lock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20120608 |