A direction-changing constant force speed limiter

Abstract

The invention discloses a direction-changing constant-force speed governor, which comprises a base, a first side plate and a second side plate vertically fixed on the base and parallel to each other, and a sheave shaft is assembled between the first side plate and the second side plate , the sheave shaft is matched with the first side plate and the second side plate through a bearing respectively, the sheave shaft rotates through the second bearing to match the sheave, and the sheave bypasses the wire rope; the sheave is provided with a centrifugal connecting rod amplification mechanism, and the centrifugal connecting rod The amplifying mechanism is hinged with the direction-changing amplifying mechanism, and the direction-changing amplifying mechanism is rotatably assembled on the sheave shaft; the direction-changing amplifying mechanism is linked with the adjusting mechanism, and the adjusting mechanism can move axially along the sheave shaft, and the two lugs of the adjusting mechanism are under the top contact The upper end of the trigger mechanism and the lower end of the trigger mechanism are hinged to the clamping mechanism, which can clamp the sheave or the wire rope after the clamping mechanism is actuated. The direction-changing constant force speed limiter of the present invention has fast high and low speed trigger response time, obvious centrifugal force amplification effect, stable overspeed detection and control, and can generate relatively constant pulling force.

Description

technical field [0001] The invention belongs to the technical field of speed limiting devices, and in particular relates to a direction-changing constant force speed limiter, which is used in the technical field of machinery. Background technique [0002] The mechanical speed limiter for elevators is a measuring and executing mechanism that triggers the electrical switch when the elevator is overspeed, and the mechanical action generates a pulling force to trigger the safety braking device. At present, there are mainly two types: pendulum type and centrifugal type. The pendulum type or rigid clamping instantaneous trigger type speed limiter is easy to realize automatic reset, and it is mostly used in elevators without machine rooms or with speeds lower than 1m / s. For overspeed governors whose speed is greater than 1m / s, centrifugal elastic clamping is often used. This kind of overspeed governor is mostly triggered by a ratchet. The overspeed trigger mechanism acts on the cir...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a direction-changing constant-force speed limiter, which solves the difficulties of low-speed and over-speed measurement, long response time and large lag, poor stability control of pulling force, difficulty in automatic reset, and speed Practical problems such as inconvenient debugging and high risk of misoperation

[0006] The mechanism of the present invention uses centrifugal weights and connecting rods to convert rotational motion into axial motion through steel balls, which can reduce the impact of vibration and make it easier to realize the adjustment limit of overspeed triggering. It amplifies the centrifugal force through the connecting rod and then passes the The secondary amplification of the V-shaped surface of the angle solves the problem of low-speed overspeed and speed limit. The axial displacement capture method is used to improve the trigger response time. The constant lifting force is solved by using laser processing technology and structural design or by clamping steel wire. In order to realize the functions of high and low speed control stability, continuous triggering, constant force lifting and automatic reset

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