A hydraulic lift truck contactor stick protection device

By designing a contactor adhesion protection device for hydraulic lifting vehicles, and using both an emergency stop switch and a wireless remote control switch to cut off the main contactor's power, the safety hazards caused by contactor adhesion or circuit faults in hydraulic lifting vehicles are solved, achieving both equipment safety and ease of maintenance.

CN115037047BActive Publication Date: 2026-06-26BINZHOU BEIHAI HUIHONG NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BINZHOU BEIHAI HUIHONG NEW MATERIAL CO LTD
Filing Date
2022-06-10
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Hydraulic lifting trucks may malfunction during use if the contactor sticks or the electrical circuit fails, causing the lifting to become uncontrollable and posing a safety hazard.

Method used

A contactor adhesion protection device for a hydraulic lifting vehicle was designed, including a protection box, an adjustment mechanism, a locking mechanism, and a heat dissipation mechanism. It provides dual protection through an emergency stop switch and a wireless remote control switch. The main contactor is de-energized by the remote control and the emergency stop switch to prevent the lifting vehicle from continuing to lift. The protection box and heat dissipation mechanism improve the safety of the contactor and facilitate maintenance.

Benefits of technology

It effectively prevents the lifting vehicle from becoming uncontrollable due to contactor sticking or circuit failure, improves equipment safety, reduces the risk of equipment and personnel injury, and facilitates contactor maintenance and inspection.

✦ Generated by Eureka AI based on patent content.

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    Figure CN115037047B_ABST
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Abstract

The application relates to the technical field of hydraulic lifting trucks, and discloses a hydraulic lifting truck contactor sticking protection device, which comprises a protection box, a mounting block is fixedly connected to the bottom of the left side of the protection box, a protection cover is hingedly connected to the top of the protection box, an adjusting mechanism is arranged at the top of the front of the protection box, and a clamping mechanism is arranged in the adjusting mechanism. The hydraulic lifting truck contactor sticking protection device is provided with a main contactor (KM) in front of the control lifting contactor (KM1, KM2) of the main circuit in the power distribution cabinet of the lifting truck, the main contactor (KM) is controlled by an emergency stop switch (SA) to be attracted and disconnected, and a wireless remote control switch (QS) is additionally arranged in the coil control circuit of the main contactor (KM) to realize double protection; when the ground monitor cannot discover the equipment fault in time or is slow in response, the operator on the lifting truck can use the wireless remote control switch (QS) to turn off the power supply, so that the lifting truck stops moving, and accidents caused by the lifting truck are prevented.
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