Automobile micro electric jack

Abstract

The invention discloses an automobile micro electric jack which comprises a direct current 12V motor with an electromagnetic drive brake, a four-level reduction gear system, a lifting screw, a bottom plate and an outer shell, wherein the lifting screw is a screw structure which is formed through mounting screws of three levels in a sleeving manner; and the lifting screws of the three levels are ball screw structures. The automobile micro electric jack is small in volume, has the advantages of highly smooth operation, precise locating, low torque, high rigidity, super silence, and the like, during lifting, and is labor-saving and rapid, and the motor lifts to jack up an object.

Description

technical field [0001] The invention relates to a miniature electric jack for automobiles, in particular to a miniature electric jack adopting a multi-stage ball screw labor-saving device, driven by a motor and equipped with a permanent magnet brake, belonging to the technical field of mechanical equipment. Background technique [0002] The jack is an essential tool for the car, and it is often used to jack up and keep part of the car body at a certain height when repairing the car or changing tires. Commonly used for small cars are: diamond-shaped hand jack, manual or hydraulic jack, diamond-shaped hand jack to achieve lifting through the rotation of the screw, easy to carry, easy to use and occupy a small space, this kind of jack Generally, it is only used when tires need to be replaced or repaired. If it is idle for a long time, it will easily cause the screw to rust and make it difficult to turn the screw. Great physical strength. [0003] The jacking mechanism of the ...

AI Technical Summary

Problems solved by technology

Its advantage is that the volume is small, and the motor drives the lifting; its disadvantage is: in order to facilitate the self-locking of the screw, the thread lift angle on each screw is smaller than the equivalent friction angle of each screw material, so that the rated power required for the motor to jack up is relatively large , especially due to infrequent use, when the screw is corroded, the starting torque of the motor is large, and even the phenomenon of stalling occurs

[0004] The invention patent "Jack for Small Cars" (CN201510902109.9) includes a support base, a base, a ball screw and a screw nut, a motor, and the first to fourth connecting rods. When the ball screw at the output end of the motor rotates, the The connecting rod mechanism drives the jack to lift up and down. The disadvantages are: 1. Due to the structure of the connecting rod, 1. The material and strength requirements of this kind of jack are very strict on the ball screw. The ball screw is easily damaged when it is working; 2. 3. The lifting speed is slow; 4. At the same time, there is no record in the description and claims of the invention that the motor is connected to the nut seat, so the motor will rotate around the ball screw during work and cannot drive the ball. screw

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