Rotor core axial fixing structure and riveting device

Abstract

The invention discloses a rotor core axial fixing structure, which comprises a bracket (1) used for fixing a rotor core and a rotor pressing plate, wherein the end, which is close to the rotor pressing plate, of the bracket (1) is provided with a convex block (11), and the convex block (11) can be deformed under the action of an external force and tighten the rotor pressing plate through expansionso as to fix the rotor core. The invention further provides a riveting device used for providing an external force for the rotor core axial fixing structure. The rotor core axial fixing structure andthe riveting device provided by the invention not only can save the axial and radial space of a rotor to the maximum extent and reduce the size of motor, but also are simple, reliable, firm in structure, high in operability and efficiency, low in cost and suitable for mass production of permanent magnet driving motors.

Description

technical field [0001] The present application relates to the technical field of electric equipment, in particular to a rotor core axial fixing structure and a riveting device. Background technique [0002] With the development and popularization of domestic electric vehicles, permanent magnet drive motors are being used more and more widely due to their advantages of small size, high power density, and wide speed range. The axial fixing method of the rotor core of a permanent magnet motor is generally related to the inner diameter of the rotor core. For a motor with a small inner diameter of the rotor core and a higher speed, after the rotor core is inserted into the shaft, arc keys are mostly used to add a protective ring, or The round nut and the round nut stop washer are used to fix the axial direction; for the motor with a large inner diameter of the rotor core, the rotor bracket is used to transition between the shaft and the rotor core, and the rotor is fixed by the r...

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