CN202671110U - Hollow hydraulic jack - Google Patents
Hollow hydraulic jack Download PDFInfo
- Publication number
- CN202671110U CN202671110U CN 201220382430 CN201220382430U CN202671110U CN 202671110 U CN202671110 U CN 202671110U CN 201220382430 CN201220382430 CN 201220382430 CN 201220382430 U CN201220382430 U CN 201220382430U CN 202671110 U CN202671110 U CN 202671110U
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- Prior art keywords
- oil
- cylinder
- hollow cylinder
- hollow
- high pressure
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- Expired - Fee Related
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Abstract
The utility model relates to a hollow hydraulic jack. The hollow hydraulic jack comprises an oil cylinder, a top block piston, high pressure quick change joints and a spring safety valve, wherein the top block piston is of hollow structure, a bottom shape of a top block piston lower layer is matched with nuts, a first oil chamber is formed by the upper portion of a lower layer hollow cylinder and the bottom of the oil cylinder, and a second oil chamber is formed by an upper layer hollow cylinder and the inner wall of the hollow cylinder body. The connection relations are as follows: the top block piston is positioned inside the oil cylinder and is matched with the oil cylinder in a sliding mode, two high pressure quick change joints are arranged on the upper portion and the lower portion of the same side of the oil cylinder outer wall, and in addition, the first oil chamber is connected with the high pressure quick change joint arranged on the lower portion by an oil tube, the second oil chamber is connected with the high pressure quick change joint arranged on the upper portion by the oil tube and the spring safety valve is disposed between the second oil chamber and the high pressure quick change joint. By the aid of a set of hydraulic system, the hollow hydraulic jack can not only achieve a lifting effect, but also pre-fasten transmission parts.
Description
Technical field
The utility model belongs to the hydraulic efficiency equipment technical field, relates to a kind of hydraulic jack, particularly a kind of hydraulic jack of hollow.
Background technology
The use of hydraulic efficiency pressure system is very extensive, although in addition electric, the pneumatic or available utilization of mechanical system, hydraulic efficiency pressure system is applied more and more.Selecting the most important reason of hydraulic efficiency pressure system is exactly that hydraulic efficiency pressure system has in transmission of power that purposes is wide, efficient is high and simple characteristics.Hydraulic efficiency pressure system generally is used to transmit mechanical energy from one to another place.
Jack is a kind of lifting the simplest highly little weight-lifting equipment.It has two kinds of mechanical type and fluid pressure types.Mechanical jack is because hoisting capacity is little, general of operation effort is used for flight-line maintenance work.Hydraulic jack is owing to compact conformation, stable working are widely used.
Hydraulic jack is applicable to the highly little various hoisting operations of lifting.Inside at hydraulic jack forms two oil pockets, the corresponding valve piston of oil pocket, the corresponding large piston of another one oil pocket.Constantly the increasing of oil pressure in oil cylinder corresponding to valve piston, the mechanical energy on the valve piston just is delivered on the large piston of another one oil pocket, thereby just forces together upward movement of large piston and the weight above the large piston.But the hydraulic jack of this spline structure can only be realized thrust in the process of using.
Some at a high speed or focus on and require the bolted driving parts must pretension.Turn bolt and nut can't reach required predetermincd tension by traditional with spanner.Present stage is all satisfied engineering demand with bolt tensioning jack in addition.
The utility model content
The purpose of this utility model is to provide a kind of can either realize that upwards thrust can realize the hydraulic jack of pulling force again, thereby realizes that a cover hydraulic efficiency pressure system can either realize that the lifting effect has and can carry out pretension to the bolted driving parts of ask for something.
For reaching described purpose, the utility model discloses a kind of hollow hydraulic jack, comprise oil cylinder, jacking block piston, high pressure quick change connector, spring safety valve, it is characterized in that: described oil cylinder comprises cylinder body and hollow cylinder, and the inwall of described cylinder body extends upward the outer wall that forms described hollow cylinder; The hollow structure that described jacking block piston is hollow cylinder and the internal diameter of its external diameter and described hollow cylinder are complementary; Be provided with between the inner and outer wall of described hollow cylinder to intercept hollow cylinder is divided into upper strata hollow cylinder and lower floor's hollow cylinder; Bottom shape and the nut of described lower floor hollow cylinder are complementary; The first oil pocket is formed on the top of described lower floor hollow cylinder and the bottom of described oil cylinder, and the inwall of described upper strata hollow cylinder and described hollow cylinder forms the second oil pocket; Described the first oil pocket and the second oil pocket all are accompanied with oil pipe;
Its annexation is: described jacking block piston is located in the described oil cylinder and described oil cylinder bearing fit; The outer wall homonymy of described oil cylinder is upper and lower to be placed with two high pressure quick change connectors, and the first oil pocket by oil pipe with join at the high pressure quick change connector of arranging down, the second oil pocket by oil pipe with join at the high pressure quick change connector of arranging, be provided with spring safety valve between the second oil pocket and the high pressure quick change connector.
Described hollow hydraulic jack also comprises lock nut, and the outer wall of described hollow cylinder is provided with outside thread, and described lock nut is connected with described hollow cylinder by screw thread.
Also be provided with protective valve between described the first oil pocket and the described high pressure quick change connector.
Compare with prior art, adopt hydraulic jack of the present utility model, can realize the lifting effect, also can realize the pretension to driving parts simultaneously.
Detailed content of the present utility model can obtain by explanation described later and institute's accompanying drawing.
Description of drawings
Fig. 1 is schematic diagram of the present utility model;
Among the figure, 1-oil cylinder, 2-jacking block piston, 3-high pressure quick change connector, 4-lock nut.
The specific embodiment
Below in conjunction with drawings and Examples the specific embodiment of the present utility model is further described, following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1, the utility model discloses a kind of hollow hydraulic jack, comprise oil cylinder 1, jacking block piston 2, high pressure quick change connector 3, spring safety valve, it is characterized in that: described oil cylinder 1 comprises cylinder body and hollow cylinder, and the inwall of described cylinder body extends upward the outer wall that forms described hollow cylinder; Described jacking block piston 2 is complementary for the internal diameter of the hollow structure of hollow cylinder and its external diameter and described hollow cylinder; Be provided with between the inner and outer wall of described hollow cylinder to intercept hollow cylinder is divided into upper strata hollow cylinder and lower floor's hollow cylinder; Bottom shape and the nut of described lower floor hollow cylinder are complementary; The first oil pocket is formed on the top of described lower floor hollow cylinder and the bottom of described oil cylinder 1, and the inwall of described upper strata hollow cylinder and described hollow cylinder forms the second oil pocket; Described the first oil pocket and the second oil pocket all are accompanied with oil pipe;
Its annexation is: described jacking block piston 2 is located in the described oil cylinder 1 and described oil cylinder 1 bearing fit; The outer wall homonymy of described oil cylinder 1 is upper and lower to be placed with two high pressure quick change connectors, and the first oil pocket by oil pipe with join at the high pressure quick change connector 3 of arranging down, the second oil pocket by oil pipe with join at the high pressure quick change connector of arranging, be provided with spring safety valve between the second oil pocket and the high pressure quick change connector.
Described hollow hydraulic jack also comprises lock nut 4, at the outer wall of described hollow cylinder outside thread is set, and described lock nut 4 is connected with described hollow cylinder by screw thread.
Between described the first oil pocket and the described high pressure quick change connector 3 protective valve can also be set.
The above only is preferential embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. a hollow hydraulic jack comprises oil cylinder, jacking block piston, high pressure quick change connector, spring safety valve, and it is characterized in that: described oil cylinder comprises cylinder body and hollow cylinder, and the inwall of described cylinder body extends upward the outer wall that forms described hollow cylinder; The hollow structure that described jacking block piston is hollow cylinder and the internal diameter of its external diameter and described hollow cylinder are complementary; Be provided with between the inner and outer wall of described hollow cylinder to intercept hollow cylinder is divided into upper strata hollow cylinder and lower floor's hollow cylinder; Bottom shape and the nut of described lower floor hollow cylinder are complementary; The first oil pocket is formed on the top of described lower floor hollow cylinder and the bottom of described oil cylinder, and the inwall of described upper strata hollow cylinder and described hollow cylinder forms the second oil pocket; Described the first oil pocket and the second oil pocket all are accompanied with oil pipe;
Its annexation is: described jacking block piston is located in the described oil cylinder and described oil cylinder bearing fit; The outer wall homonymy of described oil cylinder is upper and lower to be placed with two high pressure quick change connectors, and the first oil pocket by oil pipe with join at the high pressure quick change connector of arranging down, the second oil pocket by oil pipe with join at the high pressure quick change connector of arranging, be provided with spring safety valve between the second oil pocket and the high pressure quick change connector.
2. a kind of hollow hydraulic jack according to claim 1, it is characterized in that: also comprise lock nut, the outer wall of described hollow cylinder is provided with outside thread, and described lock nut is connected with described hollow cylinder by screw thread.
3. a kind of hollow hydraulic jack according to claim 1 and 2 is characterized in that: also be provided with protective valve between described the first oil pocket and the described high pressure quick change connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220382430 CN202671110U (en) | 2012-08-03 | 2012-08-03 | Hollow hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220382430 CN202671110U (en) | 2012-08-03 | 2012-08-03 | Hollow hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202671110U true CN202671110U (en) | 2013-01-16 |
Family
ID=47492027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220382430 Expired - Fee Related CN202671110U (en) | 2012-08-03 | 2012-08-03 | Hollow hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202671110U (en) |
-
2012
- 2012-08-03 CN CN 201220382430 patent/CN202671110U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20180803 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |