A low-floor rail vehicle bogie

Abstract

The invention relates to a low-floor railway vehicle bogie which comprises a framework, axles, a primary suspension, a secondary suspension, wheels and motor gear cases. The framework comprises side beams, cross beams and girders. Each cantilever beam protrudes outwards from the center of the corresponding side beam. The motor gear cases are hung on the outer sides of the side beams. The two sides of each cantilever beam are provided with upper hanging seats. The girder located on the same side of the corresponding cantilever beam is provided with a lower hanging seat. An upper part composed of the motor gear cases is provided with two upper installation seats relative to the two upper hanging seats. A side part composed of the motor gear cases is provided with a lower installation seat relative to the lower hanging seat. The upper installation seats and the upper hanging seats are fixedly connected through first connecting structures. The lower installation seat and the lower hanging seat are fixedly connected through a second connecting structure. A three-point hanging mode is adopted in the bogie, stress of the cantilever beams can be effectively reduced, the overall bearing state of the framework is improved, and the use space of a passenger chamber in a vehicle can be effectively increased.

Description

technical field [0001] The invention relates to a bogie, in particular to a low-floor rail vehicle bogie, and belongs to the technical field of rail vehicle manufacturing. Background technique [0002] In order to realize the low-floor of the vehicle, the traction drive system of the traditional bogie cannot be arranged between the wheels, and must be re-arranged, generally using longitudinal installation or other methods. The longitudinal traction motor-gearbox unit is suspended on the outside of the frame, for which a cantilever structure for hanging the motor must be provided on the outside of the frame. [0003] In the Chinese patent "100% low-floor light rail vehicle independent wheel power bogie" with the patent number of 201010520644.5, a bogie is disclosed, including a frame, an axle bridge, a series of springs, a series of springs, a series of vertical and horizontal Shock absorber, double pull rod traction mechanism, elastic suspension motor longitudinal drive mec...

AI Technical Summary

Problems solved by technology

[0004] With the above-mentioned four-point hanging method, the load of the driving device composed of the motor and the gearbox all acts on the cantilever outside the frame, the local stress is high, and the overall bearing capacity of the frame is weak

In addition, the structure of the four-point suspension will have the problem of uneven load bearing, and because the two inner suspension seats of the four-point suspension are close to the center of the car body, the contour line of the passenger compartment above the bogie must extend inward. Then it is connected with the floor surface, which compresses the effective use space of the passenger compartment in the car

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