Multi-stage buffer for elevator

Abstract

The invention discloses a multi-stage buffer for an elevator, and relates to the technical field of buffer devices of elevator cars. The multi-stage buffer for the elevator comprises a bottom plate, wherein the upper end face of the bottom plate is provided with a one-stage buffer assembly, a two-stage buffer assembly, a conversion assembly; the one-stage buffer assembly comprises a main cylinderseat, a plurality of oil outlets are formed in the bottom end of the main cylinder seat, a main plunger is arranged in the top end of the main cylinder seat in a vertical and sliding mode, and one end, facing to the main cylinder seat, of the main plunger is provided with a throttle; the two-stage buffer assembly comprises a plurality of minor cylinder seats, the bottom ends of the minor cylinderseats are provided with oil inlets, and minor plungers are arranged in the top end of the minor cylinder seats in a vertical and sliding mode; and the conversion assembly comprises a conversion seat connected to oil outlets and oil inlets, and a one-way valve and a direct current channel are arranged in the conversion seat in a staggered mode. When the car falls, the one-stage buffer assembly andthe two-stage buffer assembly play a buffering role one after another. According to the multi-stage buffer, the overall buffer ability is improved, and the supporting to the car is more stable; and the overall height is low, the movement distance is short, the installation is convenient, the linkage buffering effect is good, and the adaptability to a bottom pit of a well path is stronger.

Description

technical field [0001] The present invention relates to the technical field of buffer devices for elevator cars, more specifically, it relates to a multi-stage buffer for elevators. Background technique [0002] During the operation of the elevator, due to the failure of the safety gear, insufficient friction force of the traction wheel groove, insufficient braking force of the brake, mechanical failure of the traction machine, failure of the control system, etc., the car will surpass the bottom floor of the terminal landing and take a higher falling into the pit of the hoistway at a high speed, causing damage to the elevator. Therefore, buffers need to be installed in the pit of the hoistway, and the installation is required to be firm and reliable, with strong impact bearing capacity, so as to prevent the elevator car from directly hitting the bottom or top, and protect the safety of passengers or cargo and elevator equipment. [0003] In view of the above problems, the C...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that the depth of the shaft pit affects the use of high-performance buffers, the present invention provides a multi-stage buffer for elevators, which has the advantages of low height, short stroke, multi-stage buffering, and automatic reset

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