Instantaneous type safety gear for elevator

Abstract

The invention discloses an instantaneous type safety gear for an elevator, which comprises a gear body which is provided with a channel with a trapezoidal section, wherein the channel is wide at the bottom and narrow at the top; double pin roller groups and a wedge block are mounted on two sides in the gear channel respectively; the double pin roller groups and the wedge block can move up and down along a corresponding gear body inclined surface; one side surface, corresponding to the gear body inclined surface, of the wedge block forms a step, and correspondingly, a step is formed on the inclined surface of the gear body; and when the safety gear is triggered to act until the action is completed, the step of the wedge block is contacted with the step on the gear body inclined surface. According to the instantaneous type safety gear, the matched steps are arranged on the wedge block and the corresponding gear body inclined surface to replace a steel plate in the prior art; and in comparison, the instantaneous type safety gear provided by the utility model has the advantages of larger braking force and simple structure, simplifies the elevator structure, and reduces the elevator load bearing and elevator manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of elevator safety device manufacture, and in particular relates to an elevator instantaneous safety gear. Background technique [0002] Early momentary elevator safety gear, such as the safety gear disclosed in Chinese Patent No. ZL97219405.3, when the actual safety gear is in action, the double roller set and the wedge will move upwards, and it is necessary to install a very small piece at the bottom of the elevator car. Thick steel plates are used to prevent the one-sided wedge from moving upwards beyond the limit and detaching from the tong body, otherwise the energy absorbed by the safety tongs will be greatly reduced, which will affect the safe operation of the elevator. The reality is that although the addition of steel plates can meet the needs of actual use, this has led to a substantial increase in the manufacturing cost of the elevator. In addition, adding steel plates also complicates the struct...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an instantaneous safety gear with high braking force and low elevator manufacturing cost for the elevator industry, to overcome the problems caused by the low braking force and the need to install a thick steel plate at the bottom of the elevator car in the existing instantaneous safety gear. Disadvantages of higher manufacturing costs

Images