CN2555265Y

CN2555265Y - Electric jack

Info

Publication number: CN2555265Y
Application number: CN 02265261
Authority: CN
Inventors: 鲁才略
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-02
Filing date: 2002-07-02
Publication date: 2003-06-11
Anticipated expiration: 2012-07-02

Abstract

The utility model relates to an electric jack. A self-power supply automatically provided for the car or other conveying trucks is used for driving a micro DC motor, and the power is transmitted to an eccentric shaft adopting the crank convex wheel principle through a worm wheel and worm rod secondary speed reducing transmission. The revolving of the eccentric wheel promotes the reciprocation of a connecting rod and then drives a small piston to conduct reciprocation, which achieves the oil sucking and pressing of the small piston and then sends continuously the pressure into a work piston cylinder to push a top elevation piston rod to elevate to the top or fall down. The utility model changes the jack operation method that the operator gets into the space under the car or other conveying trucks for manual operation, which reduces the labor intensity and achieves the safe and convenient operation and high work efficiency.

Description

Electronic jack

Technical field

The utility model relates to a kind of lifting device of transport vehicle, particularly belongs to a kind of electronic jack field with new-type electronic, mechanical, hydraulic combined transmission.

Background technology

At present the jack of widespread use has the jack of hand-hydraulic and armstrong's patent transmission in automobile repair and maintenance, though its volume is little, in light weight, easy to carry, operating wastes time and energy, and labour intensity is big, work under hard conditions.CN2116001U discloses a kind of motorcar electric hydraulic jack, as shown in Figure 2, it adopts DC motor 8 to drive 6 work of servo variable displacement pump again by retarder 7, to hydraulic pressure self booster 2 delivery pressure oil, compression indicator 5 shows the numerical value of oil pressure, by 3-position 4-way solenoid directional control valve 4 and hydraulic control two-position four-way solenoid directional control valve 3 modulated pressure self boosters 2 and hydraulic control one-way valve 9 work, make the jacking apparatus 1 that is fixed on the electronic jack on the base 10 produce the operating function of jacking and whereabouts again.Its hydrostatic drive and hydraulic control system are comparatively complicated, and integral structure is bigger, and also higher with oily filtering accuracy requirement to fluid control, otherwise system is easy to generate fault.

Summary of the invention

The electronic jack of the utility model is exactly to provide a kind of and can alleviate operator's labour intensity in order to overcome the deficiency of existing jack of all kinds, can provide a kind of safe, convenient, lifting device that is suitable for extensive use that work efficiency is high for the operator again.

The electronic jack of the utility model comprises the miniature cocurrent electromotor of horizontal arrangement, first worm screw is housed on the output shaft of electrical motor, and be meshing with each other with first worm gear, when being fixed as one by screw and second worm screw, first worm gear drives second worm screw rotation, second worm screw is meshing with each other with second worm gear again, form " transmission of worm and wormwheel double reduction " like this with after increasing driving torque, transmission of power is given the eccentric shaft that utilizes the crank cam principle by set pin, rotatablely moving of eccentric shaft generates the crank motion of connecting rod, connecting rod promotes the valve piston crank motion, thereby the oil suction and the oily process of pressure of valve piston have been realized: when the valve piston oil suction, oil in the oil cylinder housing backs down the ball of valve piston cylinder body one side by the oilhole of base, and oil is sucked in the valve piston cylinder body; When pressing oil, the ball that valve piston is pushed the oil in the valve piston cylinder body open the big piston cylinder base by the oilhole of band check valve with pressure oil enters in the big piston cylinder body, thereby the piston rod that jack-up and big piston interference fit fuse, the bottom-to-top-height of jack-up is decided by the overflow weir position that is arranged on big piston cylinder body top.

Big piston cylinder body lower end is fixed with screw thread and base, and cylinder shell is fixed in by screw thread and cylinder cap in the upper end of big piston cylinder body, thereby realizes overall fixed.Ejecting screw rod and be bolted in the piston rod by screw thread, is the elemental height when being used to regulate the electronic jack work of the utility model.

When the electronic jack of the utility model was deactivated (realize descend) when needs, the pin of draining the oil need only outwarded winding get final product, and the interior pressure oil of big piston cylinder body this moment is released.

Compared with prior art, advantage of the present utility model is the integral structure advantages of simple, good reliability, and the energy is provided by automobile or other transport vehicle self-supply power source, uses safety of operation, convenience, work efficiency high.

Description of drawings

Fig. 1 is the structural representation of the electronic jack of the utility model;

Fig. 2 is a kind of prior art constructions scheme drawing;

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Fig. 1 is illustrated as most preferred embodiment.The miniature cocurrent electromotor 1 of the electronic jack of the utility model is horizontal arrangement, first worm screw 2 is housed on the output shaft 101 of electrical motor 1, and be meshing with each other with first worm gear 3, first worm gear 3 is fixed as one by screw 31 and second worm screw 4 and drives 4 rotations of second worm screw simultaneously, second worm screw 4 is meshing with each other with second worm gear 5 again, form " transmission of worm and wormwheel double reduction " like this with after increasing driving torque, transmission of power is given the eccentric shaft 7 that utilizes the crank cam principle by set pin 6, be that eccentric shaft 7 and second worm gear 5 be fixed together be as output shaft drivening rod 8, described eccentric shaft 7 usefulness jump rings 71 are connected with connecting rod 8, rotatablely moving of eccentric shaft 7 generated the crank motion of connecting rod 8, and described connecting rod 8 usefulness pins 81 are connected with valve piston 12; Connecting rod 8 promotes valve piston 9 crank motions, thereby the oil suction and the oily process of pressure of valve piston 9 have been realized: when valve piston 9 oil suctions, oil in oil cylinder housing 10 backs down the ball 13 of valve piston cylinder body 12 1 sides by the oilhole 11 of base, and oil is sucked in the valve piston cylinder body 12; When pressing oil, the ball 15 that valve piston 9 is pushed the oil in the valve piston cylinder body 12 open big piston cylinder body 14 bottoms by the oilhole (not shown) of band check valve with pressure oil enters in the big piston cylinder body 14, thereby the piston rod 17 that jack-up and big piston 16 interference fit fuse, the bottom-to-top-height of jack-up is limited by the overflow weir (not shown) position that is arranged on big piston cylinder body 14 tops.

The lower end of big piston cylinder body 14 is fixing with base 19 with screw thread 18, and cylinder shell 10 is fixed in by screw thread 20 and cylinder cap 21 in the upper end of big piston cylinder body 14, thereby realizes overall fixed.Ejecting screw rod 22 and be bolted in the piston rod 17 by screw thread 23, is the elemental height when being used to regulate the electronic jack work of the utility model.

The utility model using method is earlier electronic jack to be positioned over below the jacked object body, and the plug that lights a cigarette with automobile or other transport vehicle self-supply power source inserts in the socket that lights a cigarette of auto body then, with switch connection, promptly can begin jacking; When needs were deactivated (realize descend), the pin 24 of draining the oil need only outwarded winding get final product, and this moment, big piston cylinder body 14 interior pressure oils were released.

Claims

1, a kind of electronic jack, the power drive and the hydraulic jacking device that comprise base (19), constitute by DC motor (1) and reduction gear apparatus etc., it is characterized in that: described hydraulic jacking device comprises the large and small piston (16,9) in large and small piston/cylinder (14,12) and the cylinder body, big piston (16) is provided with the piston rod (17) that constitutes one with big piston, is bolted with in the interior cylindrical cavity of piston rod (17) and ejects screw rod (22); Described power drive comprises that also being located at valve piston (9) and reduction gear apparatus exports interaxle one and can drive the reciprocating transmission device of valve piston (9).

2, electronic jack as claimed in claim 1 is characterized in that: described large and small piston/cylinder (14,12) axially is and is arranged vertically, and the oil port that two cylinder body oil circuits communicate is respectively equipped with ball (13,15).

3, electronic jack as claimed in claim 1 is characterized in that: described transmission device comprises that as the eccentric shaft of reduction gear apparatus output shaft (7) eccentric shaft (7) is connected with a connecting rod (8), and connecting rod (8) is connected with valve piston (9).

4, electronic jack as claimed in claim 1, it is characterized in that: the reduction gear apparatus of described reduction gear apparatus for constituting by worm screw, worm gear, first worm screw (2) of this device is fixing with the output shaft (101) of the miniature cocurrent electromotor of horizontal setting, and be meshed with first worm gear (3), be meshed with second worm gear (5) on being fixed on eccentric shaft (7) with second worm screw (4) of the coaxial setting of first worm gear (3).

5, as any one described electronic jack of claim 1 to 4, it is characterized in that: described miniature cocurrent electromotor (1) is driven by the automobile self-supply power source.

6, electronic jack as claimed in claim 2 is characterized in that: the lower end of described big piston cylinder body (14) and base (19) are spirally connected fixing, and the upper end of big piston cylinder body (14) and cylinder cap (21) bolt also are fixed in the cylinder shell (10).