Progressive rope gripper and progressive overspeed protection safety device for dragging type lifting device

Abstract

The invention discloses a progressive rope gripper. The progressive rope gripper comprises a frame body which is provided with two energy storage spring mechanisms, a fixing plate and an unhooking mechanism, wherein a fixed brake plate is arranged on the fixing plate, a wedge-shaped slideway is formed between the fixed brake plate and the frame body, and is provided with a wedge-shaped movable brake plate; and the fixed brake plate is arranged on the inner side surface of the fixing plate by an elastic sliding assembly. The invention also discloses a progressive overspeed protection safety device for a dragging type lifting device adopting the progressive rope gripper. The clamping force of the rope gripper disclosed by the invention can be adjusted in a floating manner by an elastic piece, the progressive positive pressure is applied on a dragging type steel wire rope, and the damage of the steel wire rope caused by the sudden brake and the grand impact to the frame body with the steel structure can be avoided; and the overspeed protection safety device rapidly and directly stops the dragging type steel wire rope, avoids the falling or top rushing of a lifting cage in the construction, and plays the well role of safety protection.

Description

technical field [0001] The invention belongs to the technical field of safety protection equipment for traction-driven lifting equipment, and more specifically relates to a progressive rope clamp and an overspeed protection safety device for traction lifting equipment using the progressive rope clamp. Background technique [0002] A two-way overspeed protection device for elevators disclosed in Chinese patent 2005200549231 and an overspeed protection safety device for traction construction elevators disclosed in Chinese patent 200620059553.5 are both composed of a speed limiting device commonly used in elevators and a rope clamp. The working principle is as follows: Use the speed limiting device to measure the linear speed of the traction wire rope. When the speed of the hoisting wire rope exceeds the set safe speed, the eccentric ratchet on the speed limiting device will turn off the power supply of the drive motor through the connecting rod. If the speed continues, the conn...

AI Technical Summary

Problems solved by technology

The rope grippers in the above two technical solutions rely on the adjusting pads to adjust the braking distance. When the traction lifting equipment is used to prevent falling at a high speed, the braking distance is very unstable, and the braking distance is almost instantaneous. Without cushioning, it is easy to cause damage to transmission parts and main stressed structural parts

Images