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Electric motor

A technology of electric motors and motors, applied in the direction of electric components, electromechanical devices, electrical components, etc., can solve the problems of difficult cooling of motors, shortened service life of bearings, and high cost

Inactive Publication Date: 2021-12-03
德萨动力有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Maintenance - which is expensive and undesirable - is also expedited by another typical problem in these motors: namely, the bearings are in the center of the motor where it is very difficult to achieve proper cooling
Thermal stress also shortens bearing life

Method used

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Embodiment Construction

[0035] figure 1 Partially shown is an electric motor 10 comprising a shaft 14 integral with a rotor (not shown) and rotatable about an axis X. As shown in FIG. A shaft 14 runs coaxially through the stator 12 . The shaft 14 is coupled to the stator 12 by sliding on a sliding bearing 16 arranged between the stator 12 and the shaft 14 .

[0036] In order to carry a lubricating fluid, such as oil, and to wet with this fluid the contact surface S between the stator 12 and the shaft 14 , the shaft 14 comprises at least one internal channel 18 with an outlet 20 on the surface S. For example, channel 18 includes a central axial section and one or more radial sections from the central section to the lateral surfaces of shaft 14 .

[0037] Fluid may pass from the outlet 20 onto and / or return from the surface S and form a lubricant film 24 in the surface S. As shown in FIG.

[0038] The plain bearing 16 includes an internal channel 22 radially traversing its thickness. The channel 22...

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Abstract

An electric motor (MC) is described comprising a rotor (66), a shaft (70) integral with the rotor to transfer torque to a load, a stator (62) coaxially crossed by the shaft. To improve the thermal resistance, a plain bearing (90) placed between the stator and the shaft, and a lubricating fluid circuit (80, 76, 74, 72, 92) configured to transport lubricating fluid and wet a contact surface (S) between the stator and the shaft with the fluid.

Description

technical field [0001] The present invention relates to electric motors, and in particular to axial flow electric motors. The invention also relates to an electric vehicle equipped with the motor. Background technique [0002] Electric vehicles, especially high-performance electric vehicles, have very powerful electric motors. Typically, the motor shaft is coupled to the stator via ball or roller bearings, which are not lubricated and are subject to high stress. This is why bearings must be replaced after a certain mileage. [0003] Maintenance - which is expensive and undesirable - is also expedited by another typical problem in these motors: namely, that the bearings are in the center of the motor where proper cooling is very difficult to achieve. Thermal stress also shortens the service life of the bearings. Contents of the invention [0004] The main purpose of the present invention is to improve the prior art. [0005] Another object of the invention is to make a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/167F16C17/18F16C33/66
CPCF16C17/18F16C33/6681F16C2380/26H02K5/167H02K5/1677F16C2380/00F16C37/00F16C17/02F16C33/1055F16C33/1045H02K7/003H02K7/08H02K9/19
Inventor B·维亚内洛
Owner 德萨动力有限公司