Electric pump

Abstract

The present invention provides an electric pump preferable for a vacuum pump for an electric vehicle, for example, as being capable of reliably reducing noise caused by motor vibration. The electric pump includes an attachment mount 51 supporting a pump 31 and a motor 1 in a state of being arranged between the pump 31 and a front end portion of the motor 1 to be a motor shaft 2 side and being penetrated by the motor shaft 2, a motor cover having a close-end cylindrical shape to cover the motor 1 while the opened end side is fixed to the attachment mount 51, a first elastic member 21 provided between a rear end portion of the motor 1 and a bottom portion 10 of the motor cover 8 in a state of being compressed along the axial direction of the motor shaft 2, and a second elastic member 41 in a state of being compressed along the radial direction having the motor shaft 2 as an approximate center, so that the motor 1 is urged to the attachment mount side along the axial direction of the motor shaft by the first elastic member and the motor is urged to the motor shaft side along the radial direction by the second elastic member.

Description

technical field [0001] The present invention relates to an electric pump configured by connecting a pump to a motor shaft of an electric motor. Background technique [0002] For example, in an electric vehicle, when operating the same brake booster as that of a gasoline engine, in an electric vehicle, a vacuum pump (for example, Refer to Patent Document 1). [0003] As such a vacuum pump, there is provided a pump (for example, a vane vacuum pump) connected to the motor shaft on the side where the motor shaft protrudes from the motor. [0004] In addition, although not a vacuum pump, an electric pump configured by directly connecting a pump to a motor shaft of a motor has been proposed (for example, refer to Patent Document 2). [0005] In the pump assembly disclosed in Patent Document 2, the pump assembly including the motor unit and the pump unit directly connected to the motor shaft of the motor unit is housed in one cylindrical case. [0006] In the casing, at the pump...

AI Technical Summary

Problems solved by technology

[0010] However, in Patent Document 2, the pump assembly composed of the pump and the motor is supported on the casing through the buffer rubber, preventing vibration from being transmitted from the pump and the motor to the casing, and reducing vibration and noise. There is a limit to the absorption of vibration by rubber

In addition, it is necessary to use a rubber-like vibration-absorbing member that can absorb vibration, and there are problems of deterioration and durability due to the use environment

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