Qingdao Yijiaan Industry And Trade Co.,Ltd

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Basic structure,operating principle and Safety protection device for heavy duty four post truck lift

Author:Martin Chen Date:7/2/2019 2:35:58 AM

Basic structure,operating principle and Safety protection device for heavy duty four post truck lift


Basic structure and operating principle:

These models adopt motor driven mode and the mobile beam supporting the auto chassis frame. The lifter is composed of under carriage, upright post, reduction gear, lead screw, screw nut, beam, supporting frame, electromagnetic clutch and electric control cabinet, etc. When the lifter operates under the electric control, the reduction gear drives the lead screw turn and the screw nut drives the bracket up and down. The supporting frame can be adjusted according to the width of the auto chassis frame to fit for the lifting of different car models. 

Safety protection device:

1. The safety nut made by nanotechnology is set under the operating screw nut (see operating nut safety mechanism diagram). When the operating nut is broken suddenly due to wear or other reasons, the safety nut under the operating nut will hold up it. With the steel ball rolling device, when the operating nut breaks down and falls on the safety nut, the operating nut and elevating screw nut body will run idle with the play of steel ball and doesn't go up or down to give a safety lock and keep the lead screw free from damage.

2. The rising & descending travel limit switches are set on both the upper and lower ends of each upright posts to guarantee the automatic stop of the motor in case the travel range is exceeded.

3.The electromagnetic clutch is installed on the top of the motor shaft of the speed reducer to ensure the quick braking when the lifter shuts down in the rising or descending. 

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