Travel switch apparatus used for accumulation type suspension conveying trolley group

Abstract

The invention relates to a travel switch apparatus used for an accumulation type suspension conveying trolley group. The travel switch apparatus, arranged on a front trolley of the accumulation type suspension conveying trolley group, comprises a mounting bracket, a sensor, a trigger plate and a limiting block; the sensor consists of a senor body fixed on the mounting bracket and a moving contactwhich is arranged at the bottom of the sensor body and can act in the vertical direction; the trigger plate is rotationally connected with the mounting bracket, a groove is formed in the top, a stop part is arranged on the front side of the top, the top back side is arc-shaped by taking the rotational center of the trigger plate as the center of a circle, and a weight balancing part is arranged onthe back side of the bottom; the limiting block is arranged on the mounting bracket and positioned above the stop part; when the top of the stop part is in contact with the limiting block, the rotational centers of the moving contact, the groove and the trigger plate are on the same vertical line; and the bottom end of the moving contact props against the groove. Compared with the prior art, thetravel switch apparatus is skillful in structure, reliable in working, and has the over-travel and automatic setting functions.

Description

technical field [0001] The invention belongs to the field of limit devices, and relates to a travel switch, in particular to a travel switch device with an over-travel function. Background technique [0002] Travel switch, a kind of position switch (also known as limit switch), is a commonly used small current master electrical appliance. Use the collision of the moving parts of the production machinery to make the contact move to realize the connection or break of the control circuit to achieve a certain control purpose. Usually, this type of switch is used to limit the position or stroke of the mechanical movement, so that the moving machinery will automatically stop, reverse movement, variable speed movement or automatic reciprocating movement according to a certain position or stroke. The travel switch can be installed on a relatively stationary object (such as a fixed frame, a door frame, etc., referred to as a still life) or a moving object (such as a vehicle, a door,...

AI Technical Summary

Problems solved by technology

But when this kind of travel switch is used for the stop control of the product-and-release suspension conveying trolley group, the contact of the travel switch often collides with the bumper when it is used for a long time, which reduces the reliability of use, and the product-and-release suspension conveying trolley group has relatively low inertia. Large, stop braking requires a braking distance, and the existing direct-acting limit switch has a short contact movement stroke, which cannot meet the needs of use

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