An electric scissor jack

Abstract

The invention discloses an electric scissor jack which is convenient to operate, good in stability and high in safety, and belongs to the technical field of jacks. The electric scissor jack comprisesa top plate, a base, a supporting assembly and a driving assembly, wherein the supporting assembly comprises four groups of supporting arms connected with the top plate and the base in a rotating mode, each group of the supporting arms is formed by hinging an upper supporting arm to a lower supporting arm, and a fixing plate is arranged at the hinging position; the driving assembly is located in the middle of the supporting assembly and comprises a driving motor, four wire collecting boxes, four pulling wires, a lifting plate and a rubber spring, the driving motor is fixedly arranged in the center of the lifting plate, the wire collecting boxes are fixedly arranged at the periphery of the driving motor, the lifting plate is fixedly connected with the base through the rubber spring; and each wire collecting box is provided with a driven gear and a wire collecting column, the outputting gear of the driving motor meshes with the driven gear of the wire collecting box, the wire collectingcolumn is fixed on the center shaft of the driven gear, and the two ends of each pulling wire are fixedly connected with the wire collecting column and the fixing plate.

Description

technical field [0001] The invention relates to a jack, in particular to an electric scissor jack with convenient operation, good stability and high safety. Background technique [0002] Jack refers to the light and small lifting equipment that uses a rigid top lifting part as a working device, and the weight is lifted in a small stroke by a top bracket or a bottom claw. The jack is mainly used in factories, mines, transportation and other departments as vehicle repair and other lifting, support and other work. Its structure is light and strong, flexible and reliable, and can be carried and operated by one person. [0003] Existing jacks are roughly divided into four categories: rack jacks, screw jacks, hydraulic jacks and scissor jacks. Among them, the scissor jack is a kind of mechanical jack, which mainly reduces the distance between the screw rods between the support rods through the reciprocating shaking of the handle, and then makes the top move up and down to realiz...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing scissor jacks increase the height of the top plate by mechanically changing the distance between the center screw rod, which has the following defects: first, the jacking effect is greatly affected by the operator by mechanically shaking the screw rod, not only It consumes a lot of manpower and is time-consuming; secondly, most of the existing scissor jacks have load-carrying capacity scattered on two opposite support arms, and the force-bearing area is limited. Rollover accidents are prone to occur, endangering the life safety of the operator; third, the screw will continue to bear axial pressure during long-term work, and the long-term impact on the thread of the screw will cause the thread to wear slowly and even the stress concentration of the screw, As a result, the sliding wire or the breakage of the screw rod is caused, and the safety is difficult to guarantee

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