Secondary quasi-zero dynamic stiffness suspension and bogie for low-floor trams

Abstract

The invention relates to a secondary quasi-zero dynamic stiffness suspension device for a low-floor tramcar and a bogie.The suspension device comprises at least two transverse springs (2), perpendicular springs (4) and a tramcar body connecting piece (5) used for being connected with a tramcar body, one end of each transverse spring (2) and one end of each perpendicular spring (4) are connected with the tramcar body connecting piece (5), the other end of each transverse spring (2) and the other end of each perpendicular spring (4) are connected with a bogie body, and the transverse springs (2) are in a pre-compression state.The bogie comprises the suspension device and the bogie body, the transverse springs (2) are connected with the side wall of a U-shaped side beam (1) of the bogie body, and the perpendicular springs (4) are connected with the bottom of the U-shaped side beam (1) of the bogie body.Compared with the prior art, the suspension device and the bogie have the advantages of high static stiffness and low dynamic stiffness, have a good low-frequency vibration isolation feature, and can effectively reduce tramcar vibration, improve running stability and improve riding comfortableness.

Description

technical field [0001] The invention relates to a secondary spring, in particular to a secondary quasi-zero dynamic stiffness suspension device and a bogie for a low-floor tram. Background technique [0002] Low-floor tram is a new type of rail transit device, which has the advantages of medium capacity, low noise, environmental protection, convenience, stability, comfort, low cost, and less land occupation. It is the new favorite of urban rail transit devices. At present, low-floor trams are widely used in Europe and have developed well. The development of low-floor trams in China is in its infancy. Beijing, Shanghai, Nanjing, Guangzhou, Suzhou and other cities have plans for low-floor trams with a lot of mileage. . Secondary suspension is an important vertical support and vibration isolation component of low-floor trams. Due to the low floor of low-floor trams and limited space under the car, the air springs commonly used in subways and high-speed rails are difficult in l...

AI Technical Summary

Problems solved by technology

However, ordinary steel springs or rubber springs have relatively large dynamic stiffness, and the low-frequency vibration isolation effect is not good, resulting in poor vehicle operation comfort. If the dynamic stiffness of ordinary steel springs or rubber springs is reduced, the static stiffness will also decrease, which will cause If the static deflection is too large, the bearing capacity will decrease

[0003] The Chinese patent application number 201010520639.4 discloses a 100% low-floor light rail vehicle independent wheel trailer bogie, including frame, axle and bridge components, primary springs, secondary springs, secondary vertical, transverse shock absorbers, double tie rods Traction mechanism and hydraulic brake unit, among which four secondary vertical shock absorbers are installed on the four corners of the frame, and secondary horizontal shock absorbers are installed at both ends of the frame. The vertical and lateral shock absorbers are separated, occupying a large space , complex structure, inconvenient installation

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