Spring type speed limiter tensioning device constant in tensioning force

Abstract

A spring type speed limiter tensioning device constant in tensioning force comprises a base, a guiding assembly fixed to the base, and a tensioning wheel assembly. The tensioning wheel assembly comprises a tensioning wheel, a rope wheel installing base and a main compression spring assembly, and is characterized in that the parts, located on the two sides of the rope wheel installing base, of the base are symmetrically provided with two auxiliary compression spring assemblies; each auxiliary compression spring assembly comprises an auxiliary compression spring and an adjusting mechanism used for adjusting the stress direction and degree of the auxiliary compression spring during stretching of a steel wire rope; the two auxiliary compression spring assemblies are connected with the two sides of the rope wheel installing base correspondingly for compensating for the tensioning force, attenuated in the vertical direction, of the main compression spring assembly along with stretching of the steel wire rope. The spring type speed limiter tensioning device constant in tensioning force can compensate for tensioning force attenuation in the steel wire rope stretching range.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to a spring-type overspeed governor tensioning device with constant tension force. Background technique [0002] Existing spring-type overspeed governor tensioning device, its structure is as follows figure 1 As shown, it includes a tensioning wheel 1a, a rope wheel mounting seat 2a for installing the tensioning wheel 1a, a guide assembly 3a and a compression spring 4a. The rope wheel mounting seat 2a is installed on the guide assembly 3a and moves up and down along the guide assembly 3a Sliding, one end of the compression spring 4a is fixed on the guide assembly 3a, and the other end abuts against the sheave mounting seat 2a to provide tension in the vertical direction for the sheave mounting seat 2a. [0003] But there is following technical problem in existing spring-type overspeed governor tensioning device: because the wire rope on the tensioning pulley 1a that is installed ...

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Problems solved by technology

[0003] But there is following technical problem in existing spring-type overspeed governor tensioning device: because the wire rope on the tensioning pulley 1a that is installed on the sheave mount 2a can be extended gradually after being affected by factors such as external force, humidity, once the wire rope stretches long, the compression spring 4a will lose a certain amount of compression, which will inevitably lead to the attenuation of the tension force, which will easily cause the wire rope to slip due to insufficient tension force, which not only seriously affects the life of the wire rope itself, but may also fail to trigger the safety gear, causing passengers loss of the last security barrier

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