CN203420966U - Hydraulic opening and closing machine oil cylinder with self-locking device - Google Patents
Hydraulic opening and closing machine oil cylinder with self-locking device Download PDFInfo
- Publication number
- CN203420966U CN203420966U CN201320499877.0U CN201320499877U CN203420966U CN 203420966 U CN203420966 U CN 203420966U CN 201320499877 U CN201320499877 U CN 201320499877U CN 203420966 U CN203420966 U CN 203420966U
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- Prior art keywords
- locking sleeve
- piston rod
- locking
- self
- oil
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Abstract
The utility model provides a hydraulic opening and closing machine oil cylinder with a self-locking device, and relates to the field of structures of hydraulic opening and closing machines. The hydraulic opening and closing machine oil cylinder comprises a cylinder barrel, a front cover, a piston rod and a piston, wherein a locking sleeve is arranged on the front side of the front cover, the locking sleeve, the front cover and the cylinder barrel are connected through bolts, a locking end cover is connected to the front side of the locking sleeve, the piston rod is sleeved with the locking sleeve and the locking end cover, the locking sleeve is in interference fit with the piston rod, and an oil hole is formed in the locking sleeve in the radial direction. When the locking sleeve is assembled, the locking sleeve is heated through oil so that the inner diameter of the locking sleeve is enlarged, when the inner diameter of the locking sleeve exceeds the outer diameter of the piston rod, the piston rod is inserted into the locking sleeve, the interference requirement is met after cooling is conducted, large friction self-locking force is produced through interference elastic deformation of the locking sleeve and the piston rod, and therefore a normally-closed self-locking function is achieved. When unlocking needs to be conducted, high-pressure oil is injected into the oil hole of the locking sleeve so that the locking sleeve can be expanded open in an elastic mode and high-pressure oil lubricate the contact face between a shaft and the locking sleeve, and automatic unlocking is achieved. Free and flexible opening and closing of the piston rod of the opening and closing machine are recovered, and the opening and closing machine enters the self-locking state after oil pressure is eliminated or under the power-losing state.
Description
Technical field
The utility model relates to the structure field of hydraulic hoist.
Background technique
Hydraulic hoist is the drive unit of various water conservancies, water station and municipal engineering gate, is to be organically combined and formed by hydraulic system and hydraulic jack two-part.Under electrical equipment control, realize hydraulic jack and do axially reciprocating, drive gate to move reciprocatingly, reach the object of unlatching, closed shutter.
The defect of prior art: hydraulic hoist is long-time, hold operation under heavy shock loads complex working condition, and self-locking property is poor, especially has deadweight to need long-term suspension, can not lock for a long time gate.Must rely on the pressurize of electrical equipment Fraquent start motor fuel feeding, or to gate location, not allow downslide by external force.
Model utility content
The purpose of this utility model is in order to overcome the deficiencies in the prior art, provides a kind of and can fix a point for a long time, the oil cylinder of hydraulic headstock gear with self-locking device of multi-point fastening.
The purpose of this utility model is achieved in that the oil cylinder of hydraulic headstock gear with self-locking device, comprise cylinder barrel, protecgulum, piston rod and piston, protecgulum is arranged on the front side of cylinder barrel, piston rod is set in cylinder barrel and protecgulum, piston is fixedly connected on the rear end of piston rod, piston is equipped with in cylinder barrel, the front side of described protecgulum arranges lock sleeve, lock sleeve, protecgulum, cylinder barrel is bolted, the front side of lock sleeve connects locking end cap, lock sleeve and locking end cap are nested with on piston rod, lock sleeve and piston rod interference fit, oilhole is radially set on lock sleeve.
When assembling lock sleeve, it is taked to oil heating, its internal diameter heat is expanded, while surpassing piston rod external diameter, pack piston rod into, after cooling, reach interference requirement, utilize the interference resiliently deformable of lock sleeve and piston rod to produce very big friction self-locking power, play the function of normally closed self-locking.When needing release, at lock sleeve oilhole, pass into high pressure oil, make lock sleeve elasticity distending, and the surface of contact between axle and lock sleeve is carried out to high pressure oil and lubricate, realize automatic unlocking, the free-extension that recovers hoist piston rod opens and closes, and hoist enters self-locking state after removing oil pressure or under power failure state.
The oil groove being connected with oilhole is set in lock sleeve of the present utility model.
The first seal arrangement is set between lock sleeve of the present utility model and piston rod.
Between locking end cap of the present utility model and piston rod, the second seal arrangement is set.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is A portion enlarged view in Fig. 1.
Embodiment
As shown in Figure 1, for having the oil cylinder of hydraulic headstock gear of self-locking device, mainly comprise cylinder barrel 1, piston rod 2 and piston 3, piston 3 is fixedly connected on the rear end of piston rod 2, and piston 3 is equipped with in cylinder barrel 1.The front side of cylinder barrel 1 arranges protecgulum 4, the front side of protecgulum 4 arranges lock sleeve 6, lock sleeve 6, protecgulum 4, cylinder barrel 1 are bolted, the front side of lock sleeve 6 is bolted locking end cap 8, piston rod 2 is set in cylinder barrel 1, protecgulum 4, lock sleeve 6 and locking end cap 8, lock sleeve 6 and piston rod 2 interference fit, radially arrange oilhole 5 on lock sleeve 6, the oil groove 10(that the interior setting of lock sleeve 6 is connected with oilhole 5 as shown in Figure 2).The first seal arrangement 7 is set between lock sleeve 6 and piston rod 2, between locking end cap 8 and piston rod 2, the second seal arrangement 9 is set.
Claims (4)
1. the oil cylinder of hydraulic headstock gear with self-locking device, comprise cylinder barrel, protecgulum, piston rod and piston, protecgulum is arranged on the front side of cylinder barrel, piston rod is set in cylinder barrel and protecgulum, piston is fixedly connected on the rear end of piston rod, piston is equipped with in cylinder barrel, it is characterized in that: the front side of described protecgulum arranges lock sleeve, lock sleeve, protecgulum, cylinder barrel are bolted, the front side of lock sleeve connects locking end cap, lock sleeve and locking end cap are nested with on piston rod, and lock sleeve and piston rod interference fit, radially arrange oilhole on lock sleeve.
2. the oil cylinder of hydraulic headstock gear with self-locking device according to claim 1, is characterized in that: the oil groove being connected with oilhole is set in described lock sleeve.
3. the oil cylinder of hydraulic headstock gear with self-locking device according to claim 1, is characterized in that: the first seal arrangement is set between described lock sleeve and piston rod.
4. the oil cylinder of hydraulic headstock gear with self-locking device according to claim 1, is characterized in that: between described locking end cap and piston rod, the second seal arrangement is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499877.0U CN203420966U (en) | 2013-08-16 | 2013-08-16 | Hydraulic opening and closing machine oil cylinder with self-locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499877.0U CN203420966U (en) | 2013-08-16 | 2013-08-16 | Hydraulic opening and closing machine oil cylinder with self-locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203420966U true CN203420966U (en) | 2014-02-05 |
Family
ID=50020065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320499877.0U Expired - Lifetime CN203420966U (en) | 2013-08-16 | 2013-08-16 | Hydraulic opening and closing machine oil cylinder with self-locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203420966U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265349A (en) * | 2016-04-07 | 2017-10-20 | 中集海洋工程研究院有限公司 | The locking device and locking method of bolt-type jack up drilling platform and its jacking system |
| CN114508519A (en) * | 2022-03-04 | 2022-05-17 | 烟台星辉航空液压有限公司 | Locking oil cylinder with composite bushing and capable of holding pole in interference manner at any position |
-
2013
- 2013-08-16 CN CN201320499877.0U patent/CN203420966U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265349A (en) * | 2016-04-07 | 2017-10-20 | 中集海洋工程研究院有限公司 | The locking device and locking method of bolt-type jack up drilling platform and its jacking system |
| CN107265349B (en) * | 2016-04-07 | 2019-09-13 | 中集海洋工程研究院有限公司 | The locking device and locking method of bolt-type jack up drilling platform and its jacking system |
| CN114508519A (en) * | 2022-03-04 | 2022-05-17 | 烟台星辉航空液压有限公司 | Locking oil cylinder with composite bushing and capable of holding pole in interference manner at any position |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |