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Up-down overload auto-power-off device for electric hoist

An automatic power-off and electric hoist technology, applied in portable lifting devices, hoisting devices, etc., can solve the problems of damaged parts, poor reliability, non-stop accidents, etc.

Inactive Publication Date: 2008-10-15
孙佩杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are low sensitivity and poor reliability. When the lifting exceeds the limit value or the contacts of the AC contactor of the motor are stuck, it is easy to cause non-stop accidents and damage the machine parts.

Method used

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  • Up-down overload auto-power-off device for electric hoist

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Experimental program
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Embodiment Construction

[0007] The structure of the present invention is as shown in the accompanying drawings. It is to connect a double-head support 5 vertically upwards at the outer end of the rope guide clamp 1 of the existing electric hoist. Two concentric mounting holes are provided at the double-head support upper end. A lift sensor push plate 2 is vertically connected outwards with bolts 3 and nuts 4 in the concentric mounting holes. The outer end of the lifting sensor push plate is larger than the inner end and is arc-shaped, such as the shape of an opened folding fan. This shape can be adapted to the use of lifting sensors of various models and functions.

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PUM

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Abstract

The invention discloses a lifting overrun automatic current breaker for an electric hoist, which includes a rope guide card. One end of the rope guide card is vertically and upwards connected with a double-ended bracket, two concentric mounting holes are formed on the upper end of the double-ended bracket, and a lifting sensor push plate is connected between the mounting holes via a bolt and a nut vertically and outwards. The outer end of the lifting sensor push plate is larger than the inner end and is arc-shaped. The current breaker replaces the prior rope guide card during the installation; when lifting reaches the designated position, the sensor push plate is contacted with raising and falling sensors on the left and the right ends of the drum of the electric hoist, and a diagonal-tension-preventing and current-breaking limit controller arranged on the electric hoist cuts off the power of a main motor via signal transmission, thereby preventing the motor and other devices from being damaged.

Description

Technical field: [0001] The invention relates to lifting equipment, in particular to an over-limit automatic power-off device for an electric hoist that has a high degree of automation and can effectively control accidents caused by over-limit lifting or lowering. Background technique: [0002] At present, the lifting, lowering, and power-off functions of the electric hoist are all composed of mechanical transmission parts, which are controlled by manual operation. The disadvantages are low sensitivity and poor reliability. When the lifting exceeds the limit value or the contacts of the AC contactor of the motor are stuck, it is easy to cause non-stop accidents and damage the machine parts. Invention content: [0003] The object of the present invention is to provide an automatic and reliable electric hoist lifting control automatic power-off device. [0004] The technical solution of the present invention is accomplished in this way, it comprises a rope guide clamping pl...

Claims

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Application Information

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IPC IPC(8): B66D3/18
Inventor 孙佩杰孙方博
Owner 孙佩杰