Long-stroke displacement restrictor

Abstract

The invention discloses a long-stroke displacement restrictor. A driving rod is arranged in a cylindrical main shell; the internal end of the driving rod stretches out of the main shell; a conical head is arranged at the external end of the driving rod; an external end upper shell is arranged at the external end of the main shell in a butt joint manner; an external end lower shell is arranged below the external end upper shell through a fixing plate; a wire holder is arranged in the external end lower shell; a vertical moving hole is formed in the middle of the wire holder; two binding posts are arranged on two sides of the wire holder; binding post contacts are arranged on the lower sides of the binding posts; the conical head is positioned in the external end upper shell; an idler wheel is arranged below the conical head in a reclining manner and is arranged at the upper end of a moving rod through an idler wheel shaft; the lower end of the moving rod penetrates through the moving hole in the middle of the wire holder; a spring seat is arranged on the moving rod on the lower side of the fixing plate; a pressure spring is arranged on the moving rod between the spring seat and the wire holder; a conductive strip is fixedly arranged on the moving rod on the lower side of the wire holder; and conductive strip contacts are arranged on left and right sides of the conductive strip. The long-stroke displacement restrictor improves reliability and durability, reduces the maintenance cost, and improves the working efficiency.

Description

technical field [0001] The invention relates to a long stroke limiter. Background technique [0002] The stroke limiter is a safety device to protect the machine and its users, prevent the crane from crashing or restricting it to travel within a certain range. At present, the traditional limit switch type is commonly used in cranes. The principle is to rotate under force and cut off the control power supply. However, this structure is easily damaged, has a short service life, and has high maintenance costs. Contents of the invention [0003] The invention provides a long stroke limiter, which is more reliable and durable. [0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a long-stroke limiter, including a cylindrical main housing, a transmission rod is arranged inside the main housing, the inner end of the transmission rod protrudes from the main housing, and the transmission rod The outer end is prov...

AI Technical Summary

Problems solved by technology

[0002] The stroke limiter is a safety device to protect the machine and its users, prevent the crane from crashing or restricting it to travel within a certain range. At present, the traditional limit switch type is commonly used in cranes. The principle is to rotate under force and cut off the control power supply. However, this structure is easily damaged, has a short life and high maintenance costs

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