DING Fangfang,LI Xun（1 .Hangzhou XIZI Trust Tech Co., Ltd., Hangzhou 310022, China; 2.Wanxiang Qianchao Transmission Shaft Co., Ltd., Hangzhou 311200, China ）

Mechanical Engineer

Abstract:A three-dimensional model of stretcher elevator car frame is built in software Solid Works. To validate the strength and stiffness of the 3D model,the finite element model is analyzed in ANSYS. The suggestion for car frame structure can be proposed based on the finite element results. Therefore the final valid car frame model is obtained,which could meet the design requirements of stretcher elevator car frame.

Key words：SolidWorks；car frame：finite element analysis：ANSYS

0 Introduction

In recent years, with the improvement of economic growth and people's living standard, which is used to transport a stretcher stretcher ladder lift, has not only limited to the configuration in most hospitals, a growing number of residential areas has also increased stretcher ladder It equipped to prepare for contingencies. With the growing demand for stretcher ladder, elevator product quality requirements have been increased. Compared with ordinary elevator, pay more attention to indicators such elevator safety and comfort, and therefore higher strength and stiffness of the elevator structure requirements.

From stretcher ladder starting actual design requirements, establish a solid model with the actual structure stretcher ladder match for the car frame model finite element analysis, and recommendations for improvement for the analysis results, optimize the structure of the car frame to achieve the design requirements stretcher ladder . Through this finite element analysis to ensure the safety and rationality stretcher ladder structure, while saving design costs for the future design stretcher ladder accumulated experience.

l stretcher frame ladder car model

Since the component parts are more lift the whole staircase, elevator structure is relatively complex, so that the whole staircase elevator finite element analysis can not take into account all the factors, and therefore finite element analysis for the elevator when the whole staircase, without affecting the elevator Under the premise of the whole staircase strength and stiffness of the elevator structure some components necessary to simplify and reasonable assumptions, not only can reduce the amount of calculation of finite element analysis, but also a true reflection of the elevator in the forces of the actual conditions .

The elevator car is the main component, is a device to accommodate passengers or cargo. The main load-bearing structure of the car frame of the elevator car is the work of running, so in the process of solid modeling of the elevator car, the car frame must contain the following main load-bearing structure: the beams, straight beams, platforms and brackets, etc. components. The model is compared with the actual model of the elevator car main load-bearing structures such as the Central African Car wall, car roof, doors and other parts has been simplified, the weight of these components has been simplified to a uniform load is applied in the form of car car floor above.

Finite element analysis of the object, the stretcher bearing the weight of the ladder of design requirements for the lt, effective space inside the car 1.1m * 2.11m * 2.3m.