Flexible direct-drive type steering rack

Abstract

The invention relates to a flexible direct-drive type steering rack, which uses a flexible beam to enable a structure to be flexible. Left and right lateral racks easily do relative nodding movement, so as to be applicable to a triangular pit with a larger rail. The structure is flexible so that a series of suspension can be simplified to a very thin layer of rubber cushion, and the production cost is reduced; an elasticity transmission device is elastically suspended through a permanent magnet motor, so that the torque can be transmitted, the transmission efficiency can be improved, and the weight of a transmission mechanism can be reduced; a traction force and a braking force can be directly transmitted to a car body instead of the structure of the steering rack, and the stress condition of the structure of the steering rack is optimized; meanwhile, the length of a traction rod is not limited by the structure, so that the traction rod can be longer, the secondary addition rigidity brought by the traction rod can be reduced, and the riding comfort degree of a vehicle can be improved. A motor is suspended between wheel pairs, so that a shaft distance can be reduced. Therefore, the steering rack not only can have higher critical speed through a smaller curve, but also has good submissiveness on route irregularity.

Description

Technical field [0001] The invention relates to a flexible direct-drive bogie, belonging to the technical field of rail vehicle bogies. Background technique [0002] Traditional bogies generally use H-shaped frames, rigid beams, and rely on a series of vertical flexible suspensions to overcome the torsion and unevenness of the line. When the wheel sets travel to a gentle curve, the rigid frame will locally bear relatively large torque due to the super high curve track. When the vehicle speed is high, the connection between the frame and the first series of vertical flexible suspension will also receive a greater impact; in the traditional bogie structure design, the motor is installed on the frame to allow the motor and wheelset The dynamic disturbance and the transmission torque need to be set up with complicated couplings and gearboxes. This kind of bogie has a complex structure and low production efficiency, and the wheelbase of the bogie is large and heavy, which makes the bo...

AI Technical Summary

Problems solved by technology

It can be seen that the comparison document realizes the flexibility of the bogie through the rubber joints at the hinges. Different rubber joints are designed according to the bogies of different models. This structure uses rubber joints to realize the torsion. Due to temperature changes, the performance parameters of the rubber joints often differ greatly from the design values. At the same time, the rubber is prone to aging and cracking, with poor reliability and relatively short service life.

Moreover, the motor is still installed on the bogie, and the wheelbase has a large wheelbase, which fails to significantly improve the performance of the bogie

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