CN202152771U - Hydraulic cylinder - Google Patents
Hydraulic cylinder Download PDFInfo
- Publication number
- CN202152771U CN202152771U CN 201120277825 CN201120277825U CN202152771U CN 202152771 U CN202152771 U CN 202152771U CN 201120277825 CN201120277825 CN 201120277825 CN 201120277825 U CN201120277825 U CN 201120277825U CN 202152771 U CN202152771 U CN 202152771U
- Authority
- CN
- China
- Prior art keywords
- piston
- piston rod
- cylinder body
- end cover
- rear end
- 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, which comprises a cylinder body, a front end cover, a rear end cover, a piston and a piston rod. The front end of the piston rod is in the shape of stairs, a threaded hole is disposed on the front end face of the piston rod, the piston is connected to the front end of the piston rod in sleeved mode and fixed with the threaded hole through a matched bolt, a vent valve is fixed on the rear end cover, and a passage is arranged on the vent valve to be communicated with the cylinder body. The piston and the piston rod of the cylinder are connected with high strength, connection is more reliable, a large tensile force can be transmitted, phenomena of damage like fatigue are not prone to occur during working process, service life of the piston is prolonged, and sealing effect is good. The vent valve is disposed on the rear end cover, and air in the cylinder body can be discharged so as to avoid affecting working performance of the cylinder.
Description
Technical field
The utility model relates to a kind of oil cylinder, particularly a kind of hydraulic jack.
Background technique
Hydraulic jack is the actuator in the hydraulic system; Generally form by cylinder body, front cover, rear end cover, piston and piston rod; Because the compression ratio of liquid is very little, so when one of them oilhole oil-feed, piston will be pushed and make another oilhole fuel-displaced; Piston drive piston rod do stretch out, retraction movement, otherwise still.In hydraulic transmission; Its actuator generally is hydraulic jack or oil hydraulic motor; Can convert hydraulic pressure into mechanical energy, in the time of for needs hydraulic pressure being converted into the machinery swing or reverses power, then often need adopt hydraulic jack to realize through corresponding mechanical structure.In the existing technology, the piston of oil cylinder generally adopts FERRULETYPE to be connected with the Placement of piston rod, and there is number of drawbacks in this Placement, oil cylinder in use, cutting ferrule very easily causes fracture owing to overtired, influences the overall operation life-span of oil cylinder; The employing FERRULETYPE connects, and it is unreliable to connect, and cutting ferrule can't satisfy the requirement of big pulling force, occurs strain phenomenons such as fatigue in the course of the work easily; The employing FERRULETYPE connects, and its sealability is relatively poor; Hydraulic jack has air in the general cylinder body when beginning to insert oil circuit, directly connect oil pipe, and the air in the cylinder body can be sneaked in the hydraulic oil, influences the service behaviour of hydraulic system.
Summary of the invention
The purpose of the utility model just is to provide a kind of connection more reliable, longer service life, and have the hydraulic jack of degassing function.
To achieve these goals, the technological scheme of the utility model employing is such: the hydraulic jack of the utility model comprises cylinder body, front cover, rear end cover, piston and piston rod; The front end of said piston rod is stepped; The front end end face of piston rod is provided with tapped hole, and piston sleeve is connected on the piston rod front end, and fixes through the bolt and the tapped hole of coupling; A fixing outlet valve on the said rear end cover, outlet valve is provided with a passage and communicates with cylinder body.
As preferably, said piston face is provided with annular seal groove, is provided with seal ring in the seal groove, and the inner circumference of seal ring and said cylinder body is sealed and matched.
As preferably, the inner peripheral surface of said end cap is provided with groove, is provided with sealing gasket in the groove, and sealing gasket cooperates with said rod seal.
Compared with prior art, the advantage of the utility model is: the piston of this oil cylinder is connected with piston rod high tenacity, connects more reliable; The phenomenon that causes rod fracture because of overtired can not appear; Piston rod is connected through bolt with piston, can transmit bigger pulling force, but in the work engineering, is not prone to strain phenomenons such as fatigue; Increased the working life of piston, and good sealing effect; Rear end cover is provided with outlet valve, can discharge the air in the cylinder body, prevents to influence the service behaviour of oil cylinder.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1, rear end cover; 2, cylinder body; 3, piston; 4, bolt; 5, piston rod; 6, passage; 7, outlet valve; 8, seal ring; 9, sealing gasket.
Embodiment
To combine accompanying drawing that the utility model is described further below.
Referring to Fig. 1, the hydraulic jack of the utility model comprises cylinder body 2, front cover, rear end cover 1, piston 3 and piston rod 5; The front end of said piston rod 5 is stepped, and the front end end face of piston rod 5 is provided with tapped hole, and piston 3 is socketed in piston rod 5 front ends; And the bolt 4 through coupling is fixed with tapped hole, a fixing outlet valve 7 on the said rear end cover 1, and outlet valve 7 is provided with a passage 6 and communicates with cylinder body 2; Said piston 3 surfaces are provided with annular seal groove, are provided with seal ring 8 in the seal groove, and seal ring 8 is sealed and matched with the inner circumference of said cylinder body 2; The inner peripheral surface of said end cap is provided with groove, is provided with sealing gasket 9 in the groove, and sealing gasket 9 is sealed and matched with said piston rod 5.
The piston 3 of this oil cylinder is connected with piston rod 5 high tenacity; Connect more reliably, the phenomenon that causes rod fracture because of overtired can not occur, piston rod 5 is connected through bolt 4 with piston 3; Can transmit bigger pulling force; But in the work engineering, be not prone to strain phenomenons such as fatigue, increased the working life of piston 3, and good sealing effect; Rear end cover 1 is provided with outlet valve 7, can discharge the air in the cylinder body 2, prevents to influence the service behaviour of oil cylinder.
Claims (3)
1. hydraulic jack; Comprise cylinder body, front cover, rear end cover, piston and piston rod, it is characterized in that: the front end of said piston rod is stepped, and the front end end face of piston rod is provided with tapped hole; Piston sleeve is connected on the piston rod front end; And bolt and tapped hole through coupling are fixed, a fixing outlet valve on the said rear end cover, and outlet valve is provided with a passage and communicates with cylinder body.
2. a kind of hydraulic jack according to claim 1 is characterized in that: said piston face is provided with annular seal groove, is provided with seal ring in the seal groove, and the inner circumference of seal ring and said cylinder body is sealed and matched.
3. a kind of hydraulic jack according to claim 1 is characterized in that: the inner peripheral surface of said end cap is provided with groove, is provided with sealing gasket in the groove, and sealing gasket cooperates with said rod seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120277825 CN202152771U (en) | 2011-08-02 | 2011-08-02 | Hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120277825 CN202152771U (en) | 2011-08-02 | 2011-08-02 | Hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202152771U true CN202152771U (en) | 2012-02-29 |
Family
ID=45693268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120277825 Expired - Fee Related CN202152771U (en) | 2011-08-02 | 2011-08-02 | Hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202152771U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821791A (en) * | 2014-03-14 | 2014-05-28 | 郑敏 | Novel hydraulic oil cylinder |
| CN105298976A (en) * | 2015-10-12 | 2016-02-03 | 江苏恒立高压油缸股份有限公司 | Crusher cylinder |
| CN105673766A (en) * | 2016-03-25 | 2016-06-15 | 嘉兴职业技术学院 | Oil cylinder device dissipating heat automatically |
-
2011
- 2011-08-02 CN CN 201120277825 patent/CN202152771U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821791A (en) * | 2014-03-14 | 2014-05-28 | 郑敏 | Novel hydraulic oil cylinder |
| CN105298976A (en) * | 2015-10-12 | 2016-02-03 | 江苏恒立高压油缸股份有限公司 | Crusher cylinder |
| CN105673766A (en) * | 2016-03-25 | 2016-06-15 | 嘉兴职业技术学院 | Oil cylinder device dissipating heat automatically |
| CN105673766B (en) * | 2016-03-25 | 2019-02-26 | 嘉兴职业技术学院 | From heat dissipation cylinder apparatus |
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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: 20120229 Termination date: 20120802 |