CN203051301U - Hydraulic cylinder piston loose-preventing device - Google Patents
Hydraulic cylinder piston loose-preventing device Download PDFInfo
- Publication number
- CN203051301U CN203051301U CN 201220741160 CN201220741160U CN203051301U CN 203051301 U CN203051301 U CN 203051301U CN 201220741160 CN201220741160 CN 201220741160 CN 201220741160 U CN201220741160 U CN 201220741160U CN 203051301 U CN203051301 U CN 203051301U
- Authority
- CN
- China
- Prior art keywords
- piston
- piston rod
- hydraulic cylinder
- loose
- steel balls
- 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 hydraulic cylinder piston loose-preventing device which comprises a piston rod, a piston, steel balls and fastening screws. A wide annular groove is arranged in the piston rod, and a threaded hole eccentric to the axis of the piston rod is formed in the piston. After the piston is assembled with the piston rod, the steel balls are placed between the eccentric threaded hole and the annular groove, and the fastening screws abut against the steel balls. When the piston is impacted, the steel balls in the eccentric threaded hole and the fastening screws exert restoring torque on the piston to counteract thread-loose torque of the piston so as to prevent the piston from retreating in a rotating mode, and the purpose of preventing loose is achieved.
Description
Technical field
The utility model belongs to the hydraulic element field, particularly the oil hydraulic cylinder used of a kind of engineering machinery.
Background technique
At present, the action of equipment in the engineering machinery adopts the reciprocating double-action oil hydraulic cylinder that hydraulic pressure can be transformed into mechanical energy mostly, the frequent and power that withstands shocks of cylinder action.Since the effect of impact force frequently, the oil hydraulic cylinder rate of fault height that piston work relax causes, reliability and the working life of reducing oil hydraulic cylinder.
Summary of the invention
The purpose of this utility model provides a kind of hydraulic cylinder piston locking device with regard to being at the defective of above-mentioned prior art.
Its technical solution is as follows:
The utility model discloses a kind of hydraulic cylinder piston locking device, it comprises piston rod, piston, steel ball and Cock screw four parts, one wide circular groove is arranged on the piston rod, tapped hole with piston rod axis off-centre is arranged on the piston, after piston and the piston rod assembling, ball is placed between eccentric threaded bore and the circular groove, and Cock screw withstands ball.
Locking principle: when piston ran into impact, ball and Cock screw were offset the loosening moment of piston thread for moment of reaction of piston and are prevented that piston rotation from withdrawing from the eccentric opening, reach and loosen purpose.Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is the structural representation of the utility model mode of execution.
Fig. 2 is the A-A cross sectional view of Fig. 1.
Embodiment
As shown in the figure, the utility model mainly comprises piston rod 1, and a circular groove is arranged on the piston rod; Piston 2 has an eccentric threaded bore on the piston; Steel ball (ball) 3, part 3 are placed between circular groove and the eccentric threaded bore; Cock screw 4, Cock screw compresses steel ball.When piston 2 was subjected to impacting, steel ball (ball) 3 and the Cock screw 4 that are contained in eccentric threaded bore and the circular groove applied an opposing torque in piston rod radial direction off-centre, and offset can calculate according to its stressing conditions.This structure is typical wedge-shaped structure.The reaction force that this mechanism produces can be offset the power that screw thread is subjected to, and reaches locking purpose.
The utility model includes but are not limited to above real-time mode, and other apparent variations all should not exceed protection domain of the present utility model.
Claims (1)
1. hydraulic cylinder piston locking device, it comprises piston rod, piston, steel ball and Cock screw four parts, one wide circular groove is arranged on the piston rod, tapped hole with piston rod axis off-centre is arranged on the piston, after piston and the piston rod assembling, ball is placed between eccentric threaded bore and the circular groove, and Cock screw withstands ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220741160 CN203051301U (en) | 2012-12-30 | 2012-12-30 | Hydraulic cylinder piston loose-preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220741160 CN203051301U (en) | 2012-12-30 | 2012-12-30 | Hydraulic cylinder piston loose-preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051301U true CN203051301U (en) | 2013-07-10 |
Family
ID=48734259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220741160 Expired - Fee Related CN203051301U (en) | 2012-12-30 | 2012-12-30 | Hydraulic cylinder piston loose-preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051301U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257626A (en) * | 2015-11-09 | 2016-01-20 | 无锡市长江液压缸厂 | Piston connection anti-looseness structure used for hydraulic cylinder |
| CN105715612A (en) * | 2016-04-26 | 2016-06-29 | 合肥长源液压股份有限公司 | Throttling buffer cylinder with integrated buffer cylinder bottom |
-
2012
- 2012-12-30 CN CN 201220741160 patent/CN203051301U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257626A (en) * | 2015-11-09 | 2016-01-20 | 无锡市长江液压缸厂 | Piston connection anti-looseness structure used for hydraulic cylinder |
| CN105715612A (en) * | 2016-04-26 | 2016-06-29 | 合肥长源液压股份有限公司 | Throttling buffer cylinder with integrated buffer cylinder bottom |
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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: 20130710 Termination date: 20131230 |