In recent years, with economic growth and improvement of people's living standards, the staircase ladder for the transport stretcher elevator, has not only limited to the configuration of most hospitals, more and more residential areas have also increased the staircase ladder Of the equipment to prepare for contingencies. With the increasing demand for staircase ladder, the elevator product quality requirements also increased accordingly. Compared with ordinary elevators, such elevators pay more attention to safety and comfort indicators, so the strength of the elevator structure and stiffness requirements are higher.

Based on the actual design requirements of the stretcher ladder, a solid model is built to match the structure of the actual stretcher ladder, the finite element analysis of the car frame model is carried out, and the improvement proposal is put forward to optimize the car frame structure. . Through this finite element analysis and calculation, the safety and rationality of the stretcher structure is guaranteed, and the design cost is saved, which accumulates the experience for the later design of the stretcher structure.

As the components of the elevator ladder more, the elevator structure is relatively complex, so in the entire elevator ladder for finite element analysis can not take all the factors into account, so in the elevator for the whole ladder for finite element analysis, without affecting the elevator The strength and rigidity of the whole ladder under the premise of the elevator structure of some of the components necessary to simplify and reasonable assumptions, both to reduce the amount of finite element analysis, but also a true reflection of the elevator in the actual conditions of the force .

Car is the main part of the elevator, is to accommodate passengers or cargo equipment. The main load-bearing structure of the elevator car during operation is the car frame. Therefore, in the process of modeling the elevator car, the following main load-bearing structure should be included: upper beam, straight beam, platform and bracket Component. Compared with the actual model, this model simplifies the non-main load-bearing structures such as car wall, car top, door machine and so on in the elevator car, and the weight of these simplified components is applied in the form of uniform load Car bottom floor.

In the finite element analysis, the weight of the stairway ladder is designed to be lt, and the effective space inside the car is 1.1m × 2.11m × 2.3m.