Truck scale limit automatic adjustment device and method

Abstract

A truck scale limit automatic adjustment device and a method are provided. The device includes a limit collision block, a limit screw, a box body, a reducer, a servo motor, a catcher, proximity switches, and relays. A normally open proximity switch and a normally closed proximity switch respectively connected with the relays J1 and J2 are installed on the two sides of the limit collision block. The limit screw is provided with a disk at the front end, and the rear end is connected with the square shaft of the reducer through a square groove. The reducer is connected with the servo motor through the catcher. The servo motor is connected with the relays J1 and J2. The size of the limit gap is measured using the two proximity switches installed on a scale. The coils of the relays are powered on or off under control through on-off of the two proximity switches. The closing and opening of the contacts of the two relays is controlled to make the servo motor rotate forwardly or reversely. The servo motor drives the limit screw to move back and forth through the reducer. Thus, the limit gap is adjusted. A truck scale limit device can be adjusted quickly and automatically. The adjustment time for spot inspection is reduced. The adjustment precision is improved. The failure rate of truck scales is reduced.

Description

technical field [0001] The invention belongs to the field of measuring machinery and equipment, and in particular relates to a fast automatic adjustment device and an adjustment method for a truck scale limit. Background technique [0002] At present, when adjusting the limit device of the truck scale, the maintenance personnel need to loosen the locking part, turn the screw rod, adjust the limit gap, and then use the locking part to lock the screw rod after the measured gap is qualified. A truck scale has 8 limit positions, and it takes a long time to check and adjust. A truck scale with frequent weighing may even affect the production rhythm. With the continuous improvement of the efficiency of truck scale users, the reduction of maintenance personnel, and the need for modern production and continuous mass production, it is required that truck scales have less and less failure time during use, or even no, to meet the modernization and continuity of production. The weighin...

AI Technical Summary

Problems solved by technology

Truck scale weighing platforms are generally long, many of which are 18m or even longer. Due to thermal expansion and contraction and other reasons, the limit gap often changes, requiring frequent inspection and adjustment by maintenance personnel.

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