Motor and motor stator cooling structure

Abstract

The invention relates a motor and a motor stator cooling structure. The motor stator cooling structure comprises a water sleeve and an elastic pin, wherein the water sleeve sleeves an outer ring surface of a motor stator and is in interference fit with the motor stator, a water sleeve groove is formed in an inner ring surface of the water sleeve and extends axially, an intermediate medium is arranged in the water sleeve groove, a positioning hole is formed in the intermediate medium and the outer ring surface of the motor stator, the elastic pin is integrally of an annular structure and is fixed in the positioning hole, the shape of the positioning hole is matched with the shape of the elastic pin, a radial opening is formed in the elastic pin and communicates with the inner ring surface of the elastic pin, and an axial end, along the elastic pin, of the radial opening extends to the other axial end. With the motor and the motor stator cooling structure, provided by the embodiment of the invention, the stress concentrated effect of the water sleeve groove can be reduced, the situation that the water sleeve is deformed caused by the stress at the water sleeve groove exceeds extremeyield strength is prevented, and normal transferring of torque between the motor stator and the water sleeve under a low-temperature environment is favorably ensured.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of motors, and in particular to a motor and a cooling structure for a stator of the motor. Background technique [0002] Thermal design and thermal management are one of the major challenges facing new energy vehicles. For the drive motors of new energy vehicles, due to the limitation of the motor installation space and its own weight, the size and structure of the motor are getting smaller and smaller, but the output power However, the requirements for output torque and output torque are getting higher and higher, which makes the cooling design of the motor face greater technical problems. [0003] Most water-cooled motors use water-cooled technology outside the stator, that is, a water-jacket structure. The water jacket is a structure in which the cavity is sleeved on the outside of the stator winding of the motor, and the temperature of the motor is cooled by the liquid flowing ...

AI Technical Summary

Problems solved by technology

However, in a low temperature environment (for example, -40°C), the introduction of the elastic pin will cause the water jacket to deform, and even cause the water jacket to fail to transmit torque.

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