Composite solid wheel for rail transit vehicles and its stiffness design method

Abstract

The combined solid wheel for rail transit vehicles is characterized in that it includes a wheel vulcanized body formed by vulcanizing the inner metal and the outer rubber and a flange connection plate that can be installed in cooperation with the axle, and the number of the wheel vulcanized body is two and Coaxially aligned, the flange connection plate is sandwiched between two wheel vulcanized bodies, and is detachably connected with the wheel vulcanized body. The outer diameter of the flange connection plate is smaller than the outer diameter of the wheel vulcanized body, and the flange connection The disc projects between the rubber layers of the two wheel vulcanized bodies. The invention provides a simple and reliable combined structure, easy to assemble and replace, can realize the non-linear radial stiffness of the wheel in the load-bearing process, improve the comfort of the vehicle, and has the function of stop and limit, and can realize the radial deformation of the wheel limit, improve the safety and reliability of vehicle operation. The invention also provides a method for designing the stiffness of a combined solid wheel for a rail transit vehicle.

Description

technical field [0001] The invention relates to a combined solid wheel for rail transit vehicles and a stiffness design method thereof, belonging to the field of manufacturing combined solid wheels for rail transit vehicles. Background technique [0002] With the three-dimensional development of rail transit, more and more companies are investing in the research and development of vehicles such as straddle monorail, empty rail car, and magnetic levitation. The traditional steel wheel structure can no longer meet the development needs of rail transit. Low wear, low noise, Low-failure and low-cost solid wheels will receive more and more attention from the industry. During the operation of rail transit vehicles, solid wheel products can realize the functions of load bearing, vibration reduction and guidance according to different installation positions and design functions. In order to ensure the reliability and comfort of vehicle operation, solid wheels are required to have a...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing solid wheel technical solutions are designed for light loads and low speeds such as electric scooters, bicycles, and toy cars. Solid wheels used in rail transit require heavy loads and can achieve medium or high speed requirements. There are mainly two current implementation methods : 1. Although the ordinary rubber-hub bonded structure can realize load-carrying, shock-absorbing and guiding functions, for large-scale products, the requirements for vulcanizing molds and forming machine equipment are very high, and product development costs are at risk Big

Moreover, since the hub and the rubber are bonded together, as long as any part of the hub or rubber is damaged (such as glue removal, bulging), the entire product will be scrapped, the product will be difficult to disassemble and replace, and the maintenance cost will be high.

2. The rubber of the outer wheel and the hub are assembled. Since the rubber (or non-metallic material) has stress relaxation and creep characteristics, it is easy to cause the rubber of the outer wheel to separate from the hub during repeated heavy-duty rotation, resulting in gaps, resulting in poor operation of the vehicle. Stable, after the rubber is damaged or loosened, the mounting bolts can easily become a factor that destroys the track and the bolts become loose, which brings unsafe factors to the operation of the vehicle, and when the wheel is subjected to lateral loads, the connecting bolts are easy to withstand shear force, and the lateral load is reliable Low sex

The skeleton structure of the rubber tire in this scheme is relatively complex, the development cost and cycle cost are high, and the replacement and maintenance cost in the later stage is high

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