Elevator buffering system with variable damping force

Abstract

The invention discloses an elevator buffering system with variable damping force. The elevator buffering system comprises a buffering assembly which is fixedly arranged at the bottom of an elevator shaft and used for preventing an elevator car from making rigid contact with the bottom. The buffering assembly comprises a buffering spring arranged on a foundation and a buffering plate supported by the top of the buffering spring, wherein the buffering plate directly faces the bottom of the elevator car, and the buffering spring is a variable-pitch spring. The damping force of the elevator buffering system is gradually increased in the process of buffering the contact between the car and the bottom, increasing of the damping force is faster and gentler compared with a common spring, and therefore descent buffering smoothness and sufficient damping force are achieved. Thus, compared with the prior art, the buffering stroke and the gradual variation elastic coefficient can be increased, and a technical scheme for automatically adjusting the key performance parameter of spring force can be obtained. The elevator buffering system can be applied to a high-speed elevator, can be dynamically applied at any time, effectively improves the comfort and reliability before the car makes contact with the bottom or at the movement when the car makes contact with the buffering assembly, and improves the safety performance of the elevator.

Description

technical field [0001] The invention relates to a safety system for special equipment, in particular to a safety system for a box elevator bottoming out. Background technique [0002] The van elevator is a means of transportation for vertical transportation, which is closely related to people's daily life; the existing van elevator is mainly composed of a traction machine, a control cabinet, a car, guide rails, etc., to achieve relatively rapid up and down ; In order to achieve uplink and downlink and install related equipment, elevator shafts will be built in buildings or other places where van elevators are used to achieve smooth operation. [0003] The uplink and downlink of van elevators are generally achieved by mechanical traction, and the structure is relatively complex. Due to problems such as the use environment, cycle, equipment aging, and quality, it will cause the elevator car to fall without restraint or limited restraint, which is more serious. security issues...

AI Technical Summary

Problems solved by technology

[0003] The uplink and downlink of van elevators are generally achieved by mechanical traction, and the structure is relatively complex. Due to problems such as the use environment, cycle, equipment aging, and quality, it will cause the elevator car to fall without restraint or limited restraint, which is more serious. security issues

In the prior art, in order to solve the serious danger to the passengers caused by the car rigidly touching the bottom (directly falling to the bottom of the hoistway), a buffer device is installed at the bottom of the hoistway; the buffer device is a hydraulic buffer for high-speed elevators, and generally adopts The structure of the buffer spring, and this consideration is mainly the relationship between the elastic coefficient of the spring, the stroke and the car. Therefore, high-speed elevators cannot use springs with a large elastic coefficient, otherwise there will be obvious rigid bottoming feeling, resulting in ACCIDENT

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