Hollow shaft type railway vehicle permanent magnetic direct drive traction transmission device

Abstract

The invention discloses a hollow shaft type railway vehicle permanent magnetic direct drive traction transmission device. The device comprises a permanent magnetic traction motor, a connecting shaft,a wheel set assembly, an elastic suspension device, an elastic coupler, a shaft box, a supporting spring and a framework, wherein a power output shaft adopts a hollow shaft type structure, is supported by bearings at the two ends and adopts a structure of simultaneous output at the two ends; and the connecting shaft penetrates through the interior of the power output shaft, the two ends of the connecting shaft are inserted into protection bearings in wheel moving axes, and the two wheel moving axes are connected into a whole. The device disclosed by the invention has the advantages that a bentbeam structure is eliminated, wheel sets at the two ends are connected into a whole by virtue of the connecting shaft, the bending strength of the wheel sets is improved, and the permanent magnetic traction motor becomes one individual component, so that assembling and later maintenance are facilitated; and the overall transmission efficiency of a railway vehicle is further improved, unsprung mass is more effectively reduced, the requirement of the railway vehicle on road conditions is reduced, and the application range of the railway vehicle permanent magnetic direct drive traction transmission device is expanded.

Description

technical field [0001] The invention relates to a permanent magnet direct drive traction transmission device applicable to rail vehicles, in particular to a permanent magnet direct drive traction transmission device applicable to locomotives, bullet trains, urban rails and subways. Background technique [0002] At present, the traction drive of my country's rail vehicles generally uses a three-phase AC asynchronous traction motor as the power output source, and transmits the power to the wheelset through the gearbox. The gear box is generally directly pressed on the moving shaft to which the wheel set belongs, which not only increases the unsprung mass of the bogie, seriously affects the wheel-rail relationship, running performance and overall performance of the vehicle, but also the gear box is still in operation. There are many disadvantages such as many mechanical failures and high maintenance costs; in addition, the gearbox will also produce problems such as oil leakage ...

AI Technical Summary

Problems solved by technology

Although the structure proposed in this patent is also a permanent magnet traction motor direct drive type, the curved beam structure is complex, the bending strength is poor, and it is an unsprung mass, which affects the running performance of the rail vehicle; in addition, due to the curved beam structure Existence, the distance between the lowest point of the bogie and the rail surface is reduced, which not only leads to higher requirements on the operating road conditions, but also limits the radial and axial dimensions of the traction motor, reduces the output power of the traction motor, and makes the It can only be used in urban rail and subway

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