CN2288167Y - Electric hydraulic jack - Google Patents

Abstract

The utility model relates to an electric hydraulic jack, which comprises a bottom board 14 and a power unit and a motion unit tightly fixed on the bottom board 14. The power unit mainly adopts a direct current motor, a big belt and a small belt to conduct speed change and the double speed change of a worm speed reducer 4. The motion unit mainly adopts a plunger fuel pump 7 to drive the hydraulic cylinder and the hydraulic system of a big piston and a small piston. The electric hydraulic jack can provide large power output in an energy input condition. Meanwhile, the lifting speed can be automatically adjusted. A power supply is directly plugged into a vehicle cigar lighter. The utility model has the characteristics of convenient operation, small size, safe utilization, beautiful appearance, etc. The utility model adopts a push rod with two pistons with higher pushing height.

Description

The electric hydaulic jack

The utility model relates to instrument class mechanical device, more particularly, relates to a kind of electric hydaulic jack that can be used as the automobile specified lifting gear.

Existing electric hydaulic jack exists power little, the low deficiency that waits of efficient.

The purpose of this utility model is to provide a kind of electric hydaulic jack, and this electric hydaulic jack can overcome the shortcoming of prior art, has big, the efficient advantages of higher of power.The purpose of this utility model is to realize like this, construct a kind of electric hydaulic jack, comprise base plate 14, fastening worm reducer 4 and the hydraulic actuating cylinder seat 15 that is contained on the base plate 14, the fastening DC machine 1 that is installed on the worm reducer 4, be located at the small belt pulley 2 on 1 in the motor, be located at the big belt pulley 3 on worm reducer 4 worm screws, be coupling in the belt between small belt pulley 2 and the big belt pulley 3, be contained in the eccentric wheel 5 on the worm-wheel shaft of described worm reducer 4, be fixed on the described base plate 14 can by described eccentric wheel 5 promote directed slide plate 6, being located at hydraulic actuating cylinder seat 15 sides can be by the plunger fuel pump 7 of directed slide plate 6 promotions, described plunger fuel pump 7 has a high pressure fuel pipe 10 that enters fuel tank 11 and communicate with flow distribution apparatus 25 that communicates with fuel tank 24, on described hydraulic actuating cylinder seat 15, hydraulic actuating cylinder 18 is housed, described hydraulic actuating cylinder 18 comprises coaxial mounted from outside to inside slip big piston 17, slip valve piston 16, be equipped with on the described slip big piston 17 and can limit the gland 20 that valve piston rises in described big piston 17 inner chambers, the inner chamber of described big piston 17 communicates with high pressure fuel pipe 10 by flow distribution apparatus 25 and check valve 13, also comprise and be fastened on that an end and high pressure fuel pipe 10 is communicated with the automatic pressure valve 9 that the other ends communicate with described hydraulic actuating cylinder 18 inner chambers on the hydraulic actuating cylinder seat 15, also comprise the top cap that is fastened on the valve piston 16 22 and be contained in universal top 21 on the top cap 22, fasteningly be installed on the hydraulic actuating cylinder seat 15 and the electromagnetic hydraulic valve 8 that links to each other with high pressure fuel pipe 10.

Implement electric hydaulic jack of the present utility model, its advantage comprises: under equal consumption condition, can provide big power, but the automatic speed regulation of lifting simultaneously, automobile cigarette lighter is directly inserted in power supply, and is easy to operate, and adopts the double-piston push rod, and higher jack-up height is arranged.Also have little, the safe in utilization and characteristics such as have attractive appearance of volume.

In conjunction with the accompanying drawings and embodiments, further specify characteristics of the present utility model, in the accompanying drawing:

Fig. 1 is the structure cutaway view of electric hydaulic jack of the present utility model.

In Fig. 1, the 1st, DC machine, the 2nd, small belt pulley, the 3rd, big belt pulley, the 4th, worm reducer, the 5th, eccentric wheel, the 6th, slide plate, the 7th, column piston pump, the 8th, electromagnetic valve, the 9th, load pressure valve, the 10th, high pressure fuel pipe, the 11st, oil inlet, the 12nd, seal ring, the 13rd, check valve, the 14th, base plate, the 15th, hydraulic actuating cylinder seat, the 16th, valve piston, the 17th, big piston, the 18th, hydraulic actuating cylinder, 19 and 20 is glands, the 21st, universal top, the 22nd, top cap, the 23rd, spring, the 24th, fuel tank, the 25th, flow distribution apparatus.

In Fig. 1, electric hydaulic jack of the present utility model, motor 1 is through the deceleration system of small belt pulley 2 and big belt pulley 3 worm reducers 4 compositions, the elder generation that the oil pump power drive system that eccentric wheel 5 blade fins 6, plunger fuel pump 7 are formed, flow distribution apparatus 25, check valve 13, load pressure valve 9 are formed rises valve piston 16, the back rises big piston 17 automated conversion systems, universal top 21 and high-pressure solenoid valve etc.Small belt pulley 2 is contained on the axle of DC machine 1, and DC machine 1 fastening being contained on the worm reduction gear 4, small belt pulley 2 is coupled to the big belt pulley 3 on worm reducer 4 worm screws that are fastened on the base plate 14 by belt.Be equipped with eccentric wheel 5 on the worm gear output shaft of worm reducer 4, this eccentric wheel 5 utilizes eccentric motion to promote to be fixed on directed slide plate 6 on the base plate 14, promote to be fastened on the plunger fuel pump 7 of hydraulic actuating cylinder seat 15 sides by directed slide plate 6, the hydraulic oil of the fuel tank 23 in the hydraulic actuating cylinder seat outside will be fastened on, suck plunger pump 7, by plunger pump 7 oil pressure is gone into to be contained in to be fastened on the inner chamber of the slip big piston 17 in the hydraulic actuating cylinder 18 on the hydraulic actuating cylinder seat 15 again, the slip valve piston 16 that is enclosed in big piston 17 inner chambers is risen, after valve piston 16 is raised to the limit, by the gland 20 that is assemblied on the big piston 17 valve piston 16 limits are lived inaccurate its continuation rising, at this moment, the pressure of hydraulic oil increases, open being fastened on the automatic pressure valve 9 that links with oil inlet 10 on the hydraulic actuating cylinder seat 15, hydraulic oil flows into the inner chamber of the hydraulic actuating cylinder 18 that is fastened on the hydraulic actuating cylinder seat, slip big piston 17 is risen, by roof being risen the universal top 21 that is fastened on the top cap 22 on the valve piston 16 and be contained on the top cap 22, during falling, as long as give to be fastened on the hydraulic actuating cylinder seat 15 and the electromagnetic hydraulic valve 8 that links to each other with chargine line 10 send electricity, with the oil of hydraulic actuating cylinder 18 and big piston 17 inner chambers.Under the extension spring effect of fastening base plate 15 and top 22, with oil pressure oil sump tank 24, big piston 17 and valve piston 16 fall back to the end, and whole process finishes.

Double piston-rod is to be packed in the hydraulic actuating cylinder by two piston rod covers of size, when by rise button top car, hydraulic oil is by flow distribution apparatus 25, be introduced in the big piston bar, with valve piston 16 jack-up, after valve piston 16 pushes up automobile, its load reaches 1/2 o'clock of jack rated load, when having risen fully (or small piston rod 16), load pressure valve 9 is opened automatically, and hydraulic oil is flowed into hydraulic actuating cylinder, big piston 17 begins to rise, simultaneously to valve piston 16 stops control lever, valve piston 16 is out of service, until with automobile jack-up.During falling, by falling button after rise, to two cover solenoid valve, because of the spool sectional area difference of two cover electromagnetic valves, when jack had load, the little electromagnet in cross section was opened at once simultaneously.Through metering hole control recirculating oil quantity, piston rod is slowly fallen after rise.When motor tire one lands, when the load of jack reduces, the electromagnetic valve action that sectional area is big, recirculating oil quantity increases, and piston rod falls back at the end fast.All adopt the two-stage speed change owing to rise and fall after rise, so rise not only soon but also steady.

The plunger pump of the electric hydaulic jack that the utility model provides is to promote the plunger core back and forth movement by the eccentric wheel of worm reducer to reach high-pressure oil feed, thereby worm gear reducer is an intermittently used, electrical motor is again a high-speed electric expreess locomotive, surge of current is bigger, the noise of retarder is also bigger, and the worm reducer of the electric hydaulic jack that the utility model provides is designed to double reduction, the first order is flexible coupling the high speed of motor again after by pulley decelerates and slows down to worm reducer, be easy to blown out problem greatly with regard to having solved surge of current like this, the noise when having improved the worm gear reducer operation again.At the top of jack,, when top automobile, can guarantee the closed contact of top 22 and car bottom girder, and the landing phenomenon can not occur owing to adopting universal movable top 22.At the joining part of retarder and plunger pump, be designed to blade fin 6 and connect, solved the stuck phenomenon that occurs when big because of loading because of eccentric wheel deflection extruding oil pump core like this.

During operation, only need the power supply of jack is inserted the Cigarette lighter of automobile, by rising button, give DC machine 1 power supply, small belt pulley 2 on motor shaft is connected with big belt pulley 3 through belt pulley and carries out the first order and slow down, drive worm reducer 4 by big belt pulley 3 again and carry out speed change, promote blade fin 6 by the eccentric wheel on the worm reducer 4 and promote the operation of the round pressure oil of plunger pump 7 works again, hydraulic oil sucks plunger pump 7 through fuel tank 24 by entering oil pipe 11, by plunger pump high pressure oil is pressed into high pressure fuel pipe 10 again, through flow distribution apparatus 25, check valve 13 enters in big piston 17 bodies, valve piston 16 is boosted rising, when valve piston 16 is raised to head or after universal top 21 pushes up car, because the increase of pressure is opened load pressure valve 9, high pressure oil enters in hydraulic actuating cylinder 18 bodies, promote big piston 17 and rise, while check valve 13 closures are until roof is risen, at this moment, can unclamp the rise button, motor 1 is had a power failure, jack is no longer running just.When after hours, when needing to fall after rise, press, give electromagnetic valve 8 power supplies as long as will fall button after rise, electromagnetic valve 8 is opened, hydraulic oil in the hydraulic actuating cylinder 18 flows back to fuel tank 24 through electromagnetic valve 8, and big piston bar 17 falls after rise, when big piston bar 17 falls back to the bottom, check valve 13 is opened, hydraulic oil in big piston 17 bodies flows back to fuel tank 24 through flow distribution apparatus 25, electromagnetic valve 8, and small piston rod 16 falls back to ground, the end of whole service process under the effect of the pressure of car or spring 23.

Claims (3)

1. electric hydaulic jack, comprise base plate 14, be located at the power unit that comprises DC machine 1 on the base plate 14, motor unit by described power unit driving, it is characterized in that described power unit comprises the hydraulic actuating cylinder seat 15 that is located on the described base plate 14, be located at the hydraulic actuating cylinder 18 on the hydraulic actuating cylinder seat 15, being located at hydraulic actuating cylinder seat 15 sides can be by the plunger fuel pump 7 of described power unit output driving, the high pressure fuel pipe 10 that described plunger fuel pump 7 has an oil inlet 11 that communicates with fuel tank 24 and communicates with flow distribution apparatus 25, described hydraulic actuating cylinder 18 comprises coaxial mounted from outside to inside slip big piston 17, slip valve piston 16, be equipped with on the described slip big piston 17 and can limit the gland 20 that valve piston rises in described big piston 17 inner chambers, the inner chamber of described big piston 17 communicates with high pressure fuel pipe 10 by flow distribution apparatus 25 and check valve 13, also comprise and be fastened on that an end and high pressure fuel pipe 10 is communicated with the automatic pressure valve 9 that the other ends communicate with described hydraulic actuating cylinder 18 inner chambers on the hydraulic actuating cylinder seat 15, also comprise the top cap that is fastened on the valve piston 16 22 and be contained in top 21 on the top cap 22, fasteningly be installed on the hydraulic actuating cylinder seat 15 and the electromagnetic hydraulic valve 8 that links to each other with high pressure fuel pipe 10.

2. electric hydaulic jack according to claim 1, it is characterized in that described power unit comprises worm reducer 4, describedly be to flow motor 1 fastening being installed on the worm reducer 4, also comprise the small belt pulley 2 that is located on 1 in the motor, be located at big belt pulley 3 on worm reducer 4 worm screws, be coupling in belt between small belt pulley 2 and the big belt pulley 3, be contained in eccentric wheel 5 on the worm-wheel shaft of described worm reducer 4, be fixed on the described base plate 14 can by described eccentric wheel 5 promote directed pulley 6 as the output of power unit.

3. electric hydaulic jack according to claim 1, its feature are that also described top 21 is universal tops.