CN102003433A - Mechanical locking device for hydraulic cylinder - Google Patents
Mechanical locking device for hydraulic cylinder Download PDFInfo
- Publication number
- CN102003433A CN102003433A CN2010105727902A CN201010572790A CN102003433A CN 102003433 A CN102003433 A CN 102003433A CN 2010105727902 A CN2010105727902 A CN 2010105727902A CN 201010572790 A CN201010572790 A CN 201010572790A CN 102003433 A CN102003433 A CN 102003433A
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- CN
- China
- Prior art keywords
- piston rod
- locking sleeve
- hydraulic cylinder
- locking
- locking device
- 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.)
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Abstract
The invention provides a mechanical locking device for a hydraulic cylinder, which is technically characterized in that: a protruding part at the front end of a piston rod is provided with a locking sleeve fixed on an end cover of the hydraulic cylinder; the inner hole of the locking sleeve is in interference fit with the excircle of the piston rod so as to lock the piston rod at any position; the inner hole of the locking sleeve is provided with a spiral groove; the two ends of the groove are provided with sealing rings; the locking sleeve is thin and has certain elasticity; and when high-pressure oil enters the locking sleeve, the interference fit of the locking sleeve is changed into clearance fit, and the piston rod is loosened and can freely move like in the common oil cylinder at the moment, but when high pressure is withdrawn, the piston rod is locked in the locking sleeve again. The mechanical locking device has the advantages of novel structure and simple process, can stably bear load for a long time without any displacement, and is suitable for occasions with high requirement on locking and positioning.
Description
Technical field
The invention belongs to a kind of mechanical locking device, particularly a kind of hydraulic machinery locking device.
Background technique
Oil hydraulic cylinder is a kind of executive component that drives and bear big load, requires it can bear load long-term and stably usually when motion stops, and does not have any displacement.Both needed locking function.Common method adopts hydraulic pressure commutation line, and unidirectional line, Pilot operated check valve realize, because of oil hydraulic circuit can't solve the oil hydraulic cylinder internal leakage, and the piston displacement problem that produces, so can only use the less demanding occasion of locking and positioning.
Summary of the invention
The objective of the invention is to provide a kind of mechanical locking device of oil hydraulic cylinder at the deficiency that exists in the above-mentioned technology,
The object of the present invention is achieved like this: comprise oil hydraulic cylinder, locking sleeve, it is characterized in that front end sponson at piston rod, install one and be fixed on cylinder ends and cover a locking sleeve, its endoporus and piston rod cylindrical have interference fit, and piston rod is locked on the arbitrary position.The endoporus of locking sleeve has spiral chute, and seal ring is equipped with at the two ends of groove, and locking sleeve is thinner, has certain elasticity.After high pressure oil enters, make the interference fit of locking sleeve to have become Spielpassung, unclamp piston rod, piston rod at this moment can action freely as common oil cylinder, but in a single day cancels when high pressure, and then piston rod is locked in the locking sleeve again.
Advantage of the present invention is, novel structure, and technology is simple, can bear load long-term and stably, and not have any displacement.Be suitable for and the demanding occasion of locking and positioning.
Description of drawings:
Fig. 1 structural drawing of the present invention.
Embodiment:
Below in conjunction with accompanying drawing present embodiment is described further
By shown in Figure 1, in cylinder block 1, piston rod 2 is installed, the front end of piston rod 2 is fixed on a mechanical locking device 5 on the cylinder block 1, sealing 4 is housed in the forward flange of the front end of mechanical locking device 5 and cylinder body 1, and the cooperating of front end of the endoporus of mechanical locking device 5 and piston rod be interference fit, piston rod is locked on the arbitrary position.And locking sleeve have a spiral chute, and Sealing 4 is equipped with at the two ends of groove respectively, and locking sleeve is thinner, and have certain elasticity, after high pressure oil enters spiral chute, under the effect of high pressure oil, locking sleeve outwards expands, make original interference fit to have become Spielpassung, unclamped piston rod, at this moment piston rod again can be as common oil cylinder, act on one's own, in case let out down high pressure oil, then locking sleeve is locked piston rod.
Claims (1)
1. oil hydraulic cylinder mechanical locking device, comprise oil hydraulic cylinder, locking sleeve, it is characterized in that front end sponson at piston rod, installing one is fixed on cylinder ends and covers a locking sleeve, its endoporus and piston rod cylindrical have interference fit, and piston rod is locked on the arbitrary position, and the endoporus of locking sleeve has spiral chute, seal ring is equipped with at the two ends of groove, locking sleeve is thinner, has certain elasticity, after high pressure oil enters, make the interference fit of locking sleeve, become Spielpassung, unclamped piston rod, piston rod at this moment can be taken action as common oil cylinder freely, but in a single day cancel when high pressure, then piston rod is locked in the locking sleeve again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105727902A CN102003433A (en) | 2010-12-04 | 2010-12-04 | Mechanical locking device for hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105727902A CN102003433A (en) | 2010-12-04 | 2010-12-04 | Mechanical locking device for hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102003433A true CN102003433A (en) | 2011-04-06 |
Family
ID=43811057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105727902A Pending CN102003433A (en) | 2010-12-04 | 2010-12-04 | Mechanical locking device for hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102003433A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644633A (en) * | 2012-05-02 | 2012-08-22 | 西安交通大学 | Optional-position locking balancing oil cylinder |
| CN103272347A (en) * | 2013-06-28 | 2013-09-04 | 秦利明 | Rescue device for small-bore deep well |
| CN112606345A (en) * | 2020-12-30 | 2021-04-06 | 李元义 | Cooling device of injection mold |
-
2010
- 2010-12-04 CN CN2010105727902A patent/CN102003433A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644633A (en) * | 2012-05-02 | 2012-08-22 | 西安交通大学 | Optional-position locking balancing oil cylinder |
| CN103272347A (en) * | 2013-06-28 | 2013-09-04 | 秦利明 | Rescue device for small-bore deep well |
| CN112606345A (en) * | 2020-12-30 | 2021-04-06 | 李元义 | Cooling device of injection mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110406 |