CN201276403Y

CN201276403Y - Hydraulic jack

Info

Publication number: CN201276403Y
Application number: CNU2008201406506U
Authority: CN
Inventors: 邓永祺
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-10
Filing date: 2008-10-10
Publication date: 2009-07-22
Anticipated expiration: 2018-10-10

Abstract

The utility model provides a hydraulic jack, comprising a base, an oil tank, an oil pump, an outer cylinder, an inner cylinder, a piston, an adjustment screw rod and a secondary oil inlet pipe; wherein, the outer cylinder is positioned in the oil tank and is connected with the base; the inner cylinder is positioned in the outer cylinder, and the lower end of the inner cylinder is inserted in the base and can move up and down; the piston is inserted in the inner cylinder; the adjustment screw rod is connected with the piston; the secondary oil inlet pipe is connected with an oil chamber at the bottom of the piston; an inner-cylinder lifting oil pipe communicated with the secondary oil inlet pipe is arranged on the base, and the upper end of the inner-cylinder lifting oil pipe is positioned at the bottom of the inner cylinder; a secondary stroke one-way valve is connected with the base by screw thread, and the front end of the secondary stroke one-way valve is positioned at the junction of the secondary oil inlet pipe and the inner-cylinder lifting oil pipe. The hydraulic jack has secondary hoisting stroke, can fast and conveniently adjust the hoisting tonnage required in each jack starting stage, and can be suitable for different hoisting spaces; in addition, the working efficiency is high, the hoisting speed is fast, and the application scope is wide, therefore, the hydraulic jack is not only suitable for civilian use, but also suitable for military use.

Description

Hydraulic jack

Technical field:

The utility model relates to a kind of hydraulic jack that is used as power with hand.

Background technology:

Domestic and international in recent years employed hydraulic jack withstands on does not all do big improvement on the technical pattern, the outmoded backwardness so prior art seems, and the development of modern industry that is far from suitable demand, the modernized requirement of incompatibility military equipment especially, its obvious disadvantage is as follows:

1. has only one-level lifting stroke, make it can not be in limited lifting space, reach due lifting height on demand, so in a lot of operating environments, cause operation repeatedly for several times, this has not only strengthened labour intensity, main is to have delayed production time, this drawback is the modernization operation of life between apparent time when needs are robbed the worker and robbed, and just seems more outstanding.

2. the starting stage of any top lifting operation, because of the factors such as antagonistic force of setting of ground, spring are arranged, so the heavy load that the initial top lifting stage needs is far below the assumed load of use jack, and existing jack can only use in whole lifting process with a kind of tonnage and comes operation, so hoisting speed can only maintain work in the constant speed, inefficiency.

3. the applicable area in hoisting operation space is little, and is special when bigger lifting job space, needs pick up by craft to amass some sleepers and fill its spatial altitude, and this traditional operational method is promptly taken a lot of work and time-consuming also dangerous.

4. can not adapt to the ground-surface sharp work in ramp.The use that military trucks, armored motor car, tank etc. are equipped, a lot of times all are in the field, and the many places, ground that need the top lifting operation are in the hillside fields, if go the lifting effect behind elder generation's repairing plane earth again, the quick requirement that this obvious incompatibility modern war item is raced against time.

The utility model content:

In view of the deficiency of above-mentioned existing jack on technical pattern, the purpose of this utility model is for a kind of two-stage lifting stroke that possesses is provided, can adjust required lifting tonnage of each top lifting stage quickly and easily, can adapt to various lifting space, high efficiency, fast, the wide accommodation of hoisting speed, not only be applicable to civilianly, and be specially adapted to the army-accepted hydraulic jack.

The purpose of this utility model is achieved like this:

The utility model hydraulic jack, comprise base, the lower end is stretched in the base and base bonded assembly fuel tank, the oil pump that is communicated with fuel tank, be arranged in the lower end and the base bonded assembly outer shell of fuel tank, place the gland at fuel tank and outer shell top, being arranged in the outer shell lower end inserts on the groove energy of base, move down and the inner casing in the hole on the gland is stretched out in the upper end, the lower end is stretched in the inner casing and there is the piston of the nut that is positioned at the inner casing upper surface upper end, adjust screw mandrel with the piston thread bonded assembly, there are two ends to be communicated with oil pump and piston base oil pocket respectively on the base and the inflow pipeline of unidirectional oil sucting valve are housed on it and the oil returning tube of unidirectional delivery valve and unidirectional fuel-return valve is arranged, secondary stroke check valve mounting hole is arranged on base, the secondary inflow pipeline that two ends link to each other with secondary stroke check valve mounting hole with the piston base oil pocket respectively, there is the inner casing that communicates with the secondary inflow pipeline and the upper end is positioned at inner casing bottom to promote oil duct on the base, secondary stroke check valve is threaded in the secondary stroke check valve mounting hole and front end is positioned at secondary inflow pipeline and inner casing and promotes the oil duct intersection, is positioned at feedback oil duct that the two ends on the base communicate with inner casing riser tubing and piston base oil pocket respectively and is positioned at piston base oil pocket place unidirectional feedback valve is housed.

The movable base that is threaded is with it arranged on the above-mentioned base.

Above-mentioned movable base thread root has relief groove.

Hillside fields, the dual-purpose pick seat in level land are equipped with in above-mentioned movable base bottom.

The upper plate that band symmetrical screw slip chute is arranged in above-mentioned hillside fields, the dual-purpose pick seat in level land, upper end and upper plate pivotally attached swash plate, the going up that the upper end of being with nut is stretched into respectively in the screw rod slip chute on the upper plate of two screw rods and lower end and swash plate lower end sphere are hinged.

When making oil pump reciprocating,, realize the top lifting operation because opening and closing automatically of coordinating mutually of unidirectional oil sucting valve and unidirectional delivery valve makes the oil of fuel tank constantly be depressed into piston base with hand-drive.When needs increase the lifting tonnage, when maybe needing to increase the lifting stroke, open secondary stroke check valve, then can make pressure oil promote oil duct and secondary stroke check valve flow to the inner casing bottom through secondary inflow pipeline and inner casing from the piston base oil pocket, inner casing is risen synchronously together with nut and piston, realize the two-stage hoisting operation.This structure is different from the multistage sleeve oil cylinder in the general hydrostatic drive, its feature is arbitrarily to control the lifting height of strokes at different levels, and different required lifting tonnages of hoisting operation stage can be to operation the time, adjust quickly and easily, improve the work efficiency of facility: close secondary stroke check valve, be used for initial top lifting sessions, what use is the less relatively first order stroke of tonnage, but top lifting speed speeds, when the user feels to require great effort, can open secondary stroke check valve, make the piston of the stroke first time and the synchronous top lifting of inner casing of second stage stroke, both are simultaneously stressed, thereby increase the lifting tonnage, also increased the lifting height simultaneously, made operator's physical quality and finish the top lifting operation fast, the two is able to cooperation by the utility model.Because the two-stage stroke that possesses has promoted the lifting height exponentially, even in narrow and small working space, also can obtain bigger lifting height, whole hoisting operation height is reached settle at one go, stop general jack because of having only the one-level stroke, the repetition job status that the lifting insufficient height is occurred.When falling jack because feedback valve can self-opening, make the Residual oil of inner casing bottom, drain into the chamber below the piston fully, realize that inner casing can be seated on the base of jack fully, make the inner seal ring performance insulating effect of inner casing, like this, first order stroke (main piston) just disconnects fully with second stage stroke (inner casing) path between the two.Owing to the vital function of opening and closing in good time automatically of feedback valve is arranged, could realize that strokes at different levels use the random control of height, the quick adjusting of each lifting tonnage, thereby improve the work efficiency of this hydraulic jack.The space of the operation place hoisting operation that has is very big, and when needing the top lifting operation, existing method is to take by craft to amass some sleepers and fill its spatial altitude, carries out operation with jack is placed on it again.This traditional method is time-consuming takes a lot of work and dangerous.The utility model has been set up movable base, and this base can be civilian according to each or the top lifting needs of military hardware, is designed to a joint or number joint different in size, combine as required, so not only alleviated labour intensity, shortened man-hour, effective lifting stroke of jack is given full play to.Because the thread root at base two ends is provided with the relief groove of proper width, so after base connected, its screw thread only played interconnect function and is not subjected to vertical pressure.When needing combination, the one end is connected with jack pad assembly, and end is connected with the dual-purpose pick seat board in level land, hillside fields in addition.Carry with car (machine) for convenient, each parts of its base all can Rapid Combination become dismounting.

The utility model possesses two-stage lifting stroke, can adjust required lifting tonnage of each top lifting stage quickly and easily, can adapt to various lifting space, high efficiency, fast, the wide accommodation of hoisting speed, not only be applicable to civilianly, and be specially adapted to military.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is the birds-eye view of Fig. 1.

Fig. 3 is that A among Fig. 1 is to view.

Fig. 4 is movable base and base and hillside fields, level land dual-purpose original text seat connection diagram.

Fig. 5 is hillside fields among Fig. 4, level land dual-purpose pick seat birds-eye view.

The specific embodiment:

The utility model hydraulic jack, comprise base 1, the lower end is stretched in the base and base bonded assembly fuel tank 2, the oil pump 3 that is communicated with fuel tank, be arranged in the lower end and the base bonded assembly outer shell 4 of fuel tank, place the gland 5 at fuel tank and outer shell top, being arranged in that the outer shell lower end inserts behind the groove 6 of base can upper and lower moving and the inner casing 8 in the hole 7 on the gland is stretched out in the upper end, and the lower end is stretched in the inner casing and there is the piston 10 of the nut 9 that is positioned at the inner casing upper surface upper end, adjusts screw mandrel 11 with the piston thread bonded assembly.There are two ends to be communicated with oil pump and piston base oil pocket 12 respectively on the base and the inflow pipeline 14 of unidirectional oil sucting valve 13 are housed on it and the oil returning tube 17 of unidirectional delivery valve 15 and unidirectional fuel-return valve 16 is arranged.Secondary stroke check valve mounting hole 18 is arranged, the secondary inflow pipeline 19 that two ends link to each other with secondary stroke check valve mounting hole with the piston base oil pocket respectively on base.Have the inner casing that communicates with the secondary inflow pipeline and the upper end is positioned at inner casing bottom to promote oil duct 20 on the base, secondary stroke check valve 21 is threaded in the secondary stroke check valve mounting hole and front end is positioned at the secondary oil inlet and inner casing promotes the oil duct intersection.Being positioned at two ends on the base is positioned at piston base oil pocket place with the feedback oil duct 22 of inner casing riser tubing and piston base oil pocket respectively unidirectional feedback valve 23 is housed.

Referring to Fig. 4, the movable base 24 that is threaded is with it arranged on the base.Movable base thread root has relief groove 25.Hillside fields, the dual-purpose pick seat 26 in level land are equipped with in movable base bottom.

Referring to Fig. 4, Fig. 5, the upper plate 29 that band symmetrical screw slip chute 28 is arranged in hillside fields, the dual-purpose pick seat 26 in level land, upper end and upper plate pivotally attached swash plate 30, the upper end of band nut 27 is stretched into respectively in the screw rod slip chute on the upper plate and lower end and swash plate lower end sphere are hinged on the two screw rods 31.

Claims

1, hydraulic jack, it is characterized in that comprising base, the lower end is stretched in the base and base bonded assembly fuel tank, the oil pump that is communicated with fuel tank, be arranged in the lower end and the base bonded assembly outer shell of fuel tank, place the gland at fuel tank and outer shell top, being arranged in the outer shell lower end inserts on the groove energy of base, move down and the inner casing in the hole on the gland is stretched out in the upper end, the lower end is stretched in the inner casing and there is the piston of the nut that is positioned at the inner casing upper surface upper end, adjust screw mandrel with the piston thread bonded assembly, there are two ends to be communicated with oil pump and piston base oil pocket respectively on the base and the inflow pipeline of unidirectional oil sucting valve are housed on it and the oil returning tube of unidirectional delivery valve and unidirectional fuel-return valve is arranged, secondary stroke check valve mounting hole is arranged on base, the secondary inflow pipeline that two ends link to each other with secondary stroke check valve mounting hole with the piston base oil pocket respectively, there is the inner casing that communicates with the secondary inflow pipeline and the upper end is positioned at inner casing bottom to promote oil duct on the base, secondary stroke check valve is threaded in the secondary stroke check valve mounting hole and front end is positioned at secondary inflow pipeline and inner casing and promotes the oil duct intersection, is positioned at feedback oil duct that the two ends on the base communicate with inner casing riser tubing and piston base oil pocket respectively and is positioned at piston base oil pocket place unidirectional feedback valve is housed.

2, hydraulic jack as claimed in claim 1 is characterized in that having on the base the movable base that is threaded with it.

3, hydraulic jack as claimed in claim 2 is characterized in that movable base thread root has relief groove.

4,, it is characterized in that bottom the movable base hillside fields, the dual-purpose pick seat in level land being housed as claim 2 or 3 described hydraulic jacks.

5, hydraulic jack as claimed in claim 4, it is characterized in that having in hillside fields, the dual-purpose pick seat in level land the upper plate of band symmetrical screw slip chute, upper end and upper plate pivotally attached swash plate, the upper end of going up the band nut of two screw rods are stretched into respectively in the screw rod slip chute on the upper plate and lower end and swash plate lower end sphere are hinged.