CN204938830U - A kind of Quick lifting device of hydraulic jack - Google Patents
A kind of Quick lifting device of hydraulic jack Download PDFInfo
- Publication number
- CN204938830U CN204938830U CN201520695701.1U CN201520695701U CN204938830U CN 204938830 U CN204938830 U CN 204938830U CN 201520695701 U CN201520695701 U CN 201520695701U CN 204938830 U CN204938830 U CN 204938830U
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- CN
- China
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- hydraulic
- steel pipe
- actuating cylinder
- hydraulic jack
- check valve
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- Expired - Fee Related
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- Fluid-Pressure Circuits (AREA)
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Abstract
The utility model discloses a kind of Quick lifting device be installed in hydraulic jack, comprise the steel pipe of a hollow, steel pipe to be placed in the hydraulic stem inner chamber of large hydraulic actuating cylinder and coaxial with described hydraulic stem, steel pipe top is fixed with a piston be tightly connected with hydraulic stem, the side-walls of steel pipe bottom has oil outlet, and the check valve being positioned at large hydraulic actuating cylinder inside is equipped with at oil outlet place; The cross-sectional area of steel pipe equals the cross-sectional area of the small cylinder of hydraulic jack; When hydraulic jack zero load or underloading, hydraulic oil flows to bottom steel pipe from the base of large hydraulic actuating cylinder, and when hydraulic jack bears weight, hydraulic oil flows in large hydraulic actuating cylinder through check valve; Push rod one end leans on check valve, the other end connects tightening screw one end, and the tightening screw other end is fixedly connected with the base of large hydraulic actuating cylinder; The fast lifting hydraulic stem when hydraulic jack zero load or underloading, can also regulate load threshold value that is unloaded and underloading.
Description
Technical field
The utility model is installed in hydraulic jack, is a kind of device that can promote hydraulic stem when hydraulic jack zero load and underloading quickly.
Background technology
Hydraulic jack is made up of parts such as large hydraulic actuating cylinder, large piston, small cylinder, valve piston, spanner, hydraulic stem, fuel tanks, when spanner upwards promotes, drive the valve piston upward movement in the hydraulic stem of small cylinder and small cylinder, the oil in fuel tank is sucked into valve piston bottom by oil pipe and one-way cock; Spanner is toward driving valve piston downward when pressing down, the oil of valve piston bottom is pressed into the large piston lower portion in large hydraulic actuating cylinder by internal oil passages, make the large piston upwards in large hydraulic actuating cylinder, drive the hydraulic stem of large hydraulic actuating cylinder upwards simultaneously; Because of leverage, valve piston low pressure increases decades of times, and large piston area is again the decades of times of valve piston area, and power, by spanner to valve piston increases more than ten times, produces top lifting force.Namely give the power that the hydraulic stem one of the small cylinder in same hydraulic medium is less, then the hydraulic stem place of the large hydraulic actuating cylinder of load place, by having a larger hydraulic coupling, can push up and lift heavier weight.Existing this hydraulic jack in use Problems existing is: because small cylinder area is less, according to the principle of constancy of volume, large and small hydraulic actuating cylinder part miles of relative movement is inversely proportional to the area ratio of large and small hydraulic actuating cylinder, therefore cause driving efficiency low, like this, at hydraulic jack without the need to during by heavy lift, such as when zero load and underloading, but with need by heavy lift time lifting velocity the same slow, the hoisting speed when hoisting speed namely when zero load, underloading and carrying heavy lift is the same, cannot realize top fast and lift the work of hydraulic jack.
Summary of the invention
The utility model object is to solve existing hydraulic jack Problems existing, provides a kind of Quick lifting device of hydraulic jack, improves lifting velocity when hydraulic jack withstands on zero load or underloading, and work is lifted on the top that can complete hydraulic jack quickly.
For achieving the above object, the technical solution adopted in the utility model is: the steel pipe comprising a hollow, steel pipe to be placed in the hydraulic stem inner chamber of large hydraulic actuating cylinder and coaxial with described hydraulic stem, steel pipe top is fixed with a piston be tightly connected with hydraulic stem, the side-walls of steel pipe bottom has oil outlet, and the check valve being positioned at large hydraulic actuating cylinder inside is equipped with at oil outlet place; The cross-sectional area of steel pipe equals the cross-sectional area of the small cylinder of hydraulic jack; When hydraulic jack zero load or underloading, hydraulic oil flows to bottom steel pipe from the base of large hydraulic actuating cylinder, and when hydraulic jack bears weight, hydraulic oil flows in large hydraulic actuating cylinder through check valve.
Further, push rod one end leans on check valve, the other end connects tightening screw one end, and the tightening screw other end is fixedly connected with the base of large hydraulic actuating cylinder.
Advantage after the utility model adopts technique scheme is: the utility model is the composite cylinder existing traditional single plunger piston fluid pressure cylinder having been made into two epitrochoidal chambers, can at hydraulic jack fast lifting hydraulic stem during unloaded or underloading, accelerate ascending velocity, thus improve the work efficiency of hydraulic jack, simultaneously, load threshold value that is unloaded and underloading can also be regulated, thus effectively raise the work efficiency of this hydraulic jack.
Accompanying drawing explanation
Fig. 1 is profile block diagram of the present utility model;
Fig. 2 is main cutaway view of the present utility model;
In figure: 1. tightening screw; 2. push rod; 3. check valve; 4. flange; 5. steel pipe; 6. piston.
Detailed description of the invention
See Fig. 1, the utility model comprises the steel pipe 5 of a hollow, and the central coaxial of the hydraulic stem of the large hydraulic actuating cylinder of steel pipe 5 center and hydraulic jack is placed in the hydraulic stem inner chamber of large hydraulic actuating cylinder, and the external diameter of steel pipe 5 is less than hydraulic stem internal diameter.Be fixed with a piston 6 on steel pipe 5 top, seal between piston 6 and hydraulic stem, utilize piston 6 to play sealing function, operationally jack-up hydraulic stem, make large hydraulic actuating cylinder have the composite cylinder structure of two epitrochoidal chambers.
The bottom of steel pipe 5 is fixedly connected on the base of large hydraulic actuating cylinder by flange 4, connect inlet valve below the base of large hydraulic actuating cylinder, and this inlet valve connects the small cylinder of large hydraulic actuating cylinder by oil pipe.The side-walls of steel pipe 5 bottom has oil outlet, installs check valve 3 at oil outlet place, and it is inner that check valve 3 is positioned at large hydraulic actuating cylinder, is fixed on by check valve 3 on the base of large hydraulic actuating cylinder.
The center shaft of push rod 2 and the center shaft of steel pipe 5 perpendicular, push rod 2 center and check valve 3 central coaxial, push rod 2 one end leans at check valve 3, and push rod 2 other end connects tightening screw 1 one end, the effect of push rod 2 operationally withstands check valve 3 to steel pipe 5 direction, prevents its leakage of oil.
Tightening screw 1 is coaxial with push rod 2, the other end of tightening screw 1 is fixedly connected on the base of large hydraulic actuating cylinder, act on push rod 2 by tightening and unscrewing tightening screw 1, regulating action in the hydraulic fluid pressure of check valve 3, thus plays the effect regulating underloading load threshold value.
The cross-sectional area of steel pipe 5 equals the cross-sectional area of the small cylinder of hydraulic jack, enters the speed of the oil-feed of large hydraulic actuating cylinder far above existing traditional hydraulic jack.
During utility model works, when hydraulic jack zero load or light condition, hydraulic oil flows to bottom steel pipe 5 from the base of large hydraulic actuating cylinder and enters in steel pipe 5, relative to the area ratio between the cross-sectional area of large hydraulic actuating cylinder and the cross-sectional area of small cylinder, the cross-sectional area of steel pipe 5 and the cross-section variation of small cylinder less, such oil-feed speed is fuel-displaced substantially identical with small cylinder, and check valve 3 is in off condition, and now hydraulic stem lifting speeds is very fast.And when hydraulic jack needs to bear weight, the hydraulic oil pressure of steel pipe 5 inside becomes large, after exceeding the operation threshold of check valve 3, check valve 3 is opened, hydraulic oil flows in large hydraulic actuating cylinder through check valve 3 simultaneously, just become the mode of operation of existing traditional hydraulic jack, now the hydraulic stem lifting speeds of large hydraulic actuating cylinder is slack-off.
The utility model is after using for a long time, the spring of check valve 3 inside can change, also impurity etc. can be increased in hydraulic oil, the proterties of hydraulic oil can be changed, cause the operation threshold of the check valve 3 of hydraulic jack underloading and heavy duty to change, use tightening screw 1 to change change threshold when hydraulic jack heavy duty and underloading.After adjustment, change threshold value, conveniently accelerate work efficiency.
Tightening screw 1 and push rod 2 will design according to the spring change of check valve 3 inside and operation threshold change.
Claims (5)
1. the Quick lifting device of a hydraulic jack, it is characterized in that: the steel pipe (5) comprising a hollow, steel pipe (5) to be placed in the hydraulic stem inner chamber of large hydraulic actuating cylinder and coaxial with described hydraulic stem, steel pipe (5) top is fixed with a piston be tightly connected with hydraulic stem (6), the side-walls of steel pipe (5) bottom has oil outlet, and the check valve (3) being positioned at large hydraulic actuating cylinder inside is equipped with at oil outlet place; The cross-sectional area of steel pipe (5) equals the cross-sectional area of the small cylinder of hydraulic jack; When hydraulic jack zero load or underloading, hydraulic oil flows to steel pipe (5) bottom from the base of large hydraulic actuating cylinder, and when hydraulic jack bears weight, hydraulic oil flows in large hydraulic actuating cylinder through check valve (3).
2. the Quick lifting device of hydraulic jack according to claim 1, is characterized in that: push rod (2) one end leans, the other end upper at check valve (3) and connects tightening screw (1) one end, and tightening screw (1) other end is fixedly connected with the base of large hydraulic actuating cylinder.
3. the Quick lifting device of hydraulic jack according to claim 1, is characterized in that: steel pipe (5) center and described hydraulic stem central coaxial, and steel pipe (5) bottom is fixedly connected with the base of large hydraulic actuating cylinder by flange (4).
4. the Quick lifting device of hydraulic jack according to claim 1, is characterized in that: check valve (3) is fixedly connected with the base of large hydraulic actuating cylinder.
5. the Quick lifting device of hydraulic jack according to claim 2, is characterized in that: push rod (2) center shaft and steel pipe (5) center shaft perpendicular, push rod (2) center and check valve (3) central coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520695701.1U CN204938830U (en) | 2015-09-10 | 2015-09-10 | A kind of Quick lifting device of hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520695701.1U CN204938830U (en) | 2015-09-10 | 2015-09-10 | A kind of Quick lifting device of hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204938830U true CN204938830U (en) | 2016-01-06 |
Family
ID=55006273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520695701.1U Expired - Fee Related CN204938830U (en) | 2015-09-10 | 2015-09-10 | A kind of Quick lifting device of hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204938830U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534209A (en) * | 2018-11-28 | 2019-03-29 | 徐州圣旺达液压机械有限公司 | A kind of pressure device of hydraulically extensible machine |
| CN112479075A (en) * | 2020-11-26 | 2021-03-12 | 安徽盛世开元装备科技有限公司 | Jacking device for mounting steel structure net rack and using method thereof |
-
2015
- 2015-09-10 CN CN201520695701.1U patent/CN204938830U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534209A (en) * | 2018-11-28 | 2019-03-29 | 徐州圣旺达液压机械有限公司 | A kind of pressure device of hydraulically extensible machine |
| CN112479075A (en) * | 2020-11-26 | 2021-03-12 | 安徽盛世开元装备科技有限公司 | Jacking device for mounting steel structure net rack and using method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20180910 |