An automatic reset wire rope brake

Abstract

The invention discloses an automatic resetting steel wire rope brake, which comprises two side plates, a fixed brake plate, a moving brake plate, a motor lead screw and push block resetting mechanism, an electromagnet resetting mechanism and an electromagnetic triggering mechanism, wherein the fixed brake plate and the moving brake plate are arranged in parallel, and an interval is kept between the opposite clamping surfaces of the fixed brake plate and the moving brake plate; two sides of the moving brake plate are respectively and rotatably matched with one end of a link arm, and the moving brake plate can do translational motion towards or away from the fixed brake plate under the drive of the two link arms; the other end of each of the two link arms is rotatably matched with one end of a sliding axle; two ends of the sliding axle are respectively in sliding fit with arc-shaped grooves of the two side plates; a hooking part is formed on a swing-type latch hook, and is used for hooking and locking the sliding axle; the swing end of the swing-type latch hook is triggered by the electromagnetic or mechanical triggering mechanism to enable the swing end to release the sliding axle; the electromagnetic triggering mechanism, the latch hook, the sliding axle and the moving brake plate are promoted to reset by the motor lead screw and push block resetting mechanism through the electromagnet resetting mechanism. According to the automatic resetting steel wire rope brake disclosed by the invention, elevator ascending and descending over-speed protection and car accidental movement protection can be realized simultaneously.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and relates to an elevator safety braking device, in particular to an automatic reset wire rope brake. Background technique [0002] At present, wire rope brakes for elevators are mainly protection devices for upward overspeeding of elevators. They adopt the mode of power-on trigger action and manual mechanical reset when a fault occurs. The relevant requirements of the standard for the accidental movement protection device of the cabin; moreover, in terms of the reset method, the reset by manual operation cannot meet the normal use needs of customers; At the same time, it meets the braking life requirements of the unexpected movement of the car. For this reason, it is necessary to improve the design of the existing wire rope brake to make it more in line with the standard, with more perfect functions, more optimized performance and more stable control. [0003] After searching...

AI Technical Summary

Problems solved by technology

[0003] After searching the existing technical literature, it is found that the current wire rope brake is designed based on the uplink overspeed protection, and the mechanical manual reset method is the main method, which brings a lot of problems to the limited operating space, high floors and machine room-less elevators. It is very inconvenient; in addition, when it is triggered by electricity, an intermediate control mechanism is added, the control delay is long, the current of the electromagnet is relatively large, the capacity of the backup power supply is large, and the power consumption is high

Therefore, its control principle, braking force and brake lining life are not suitable for car accidental movement protection

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