Broken rope protective device of upright lift gate

Abstract

The invention discloses a broken rope protective device of an upright lift gate. The broken rope protective device comprises a bearing shaft, one end of the bearing shaft is connected with the upright lift gate, and the other end is equipped with a mounting substrate, two surfaces of the mounting substrate are respectively equipped with a broken rope triggering mechanism and a track clamping executive mechanism. The invention adopts a bearing shaft as a protected object to connect with the device, the gravity of the lift gate is used for braking, and the spring force is mainly used for triggering the broken rope; and therefore, the braking force is in proportion to the gravity of the lift gate directly, that is, the heavier the lift gate is, the greater the braking force is. The broken rope protective device is reliable in braking, and compact in structure. By adopting a pair of lever mechanisms in the broken rope triggering mechanism in the invention, the broken rope protective device is flexible in action and reliable. A rack mechanism and a gear mechanism are applied to the track clamping executive mechanism to convert the linear motion into the rotary motion; and the clamping force is amplified by using a method for reducing a clamping cam force arm, so that the broken rope protective device has a compact structure, and high action reliability.

Description

technical field [0001] The invention relates to a broken rope protection device, in particular to a broken rope protection device for a vertical lifting door. It is mainly used in the fall protection of heavier doors. Background technique [0002] In the prior art, there are many types of rope breakage protection devices. The Internet Baidu Library "Structure Analysis of SS Type Construction Hoist Rope Breakage Protection Devices" introduces "an eccentric wheel type rope breakage protection device". like Figure 8 As shown, it is mainly composed of a spring 100, a link mechanism 300, and a pair of slide rails clamping the eccentric block 400, wherein the link mechanism 300 and the eccentric block 400 are fixedly connected and can rotate around the axis of the eccentric block 400 together. Lifting force should be added on the link mechanism 300 by a conversion mechanism of a straight line and rotation. When the wire rope is tightened, the spring is in a state of compressed ...

AI Technical Summary

Problems solved by technology

From the principle of this action, it can be seen that its braking is clamped and braked by spring force, and the gravity of the elevator is not used. If a larger braking force is to be obtained, the volume of the spring and the link mechanism must increase. The size of the protective device is larger and the structure is not easy to layout

Furthermore, this article only gives the mechanical principle of the device, without giving the specific structure. In fact, the design of the specific structure is the key to ensure the sensitive and reliable action of the broken rope protection device.

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