Electric vacuum pump for automobile

Abstract

The invention discloses an electric vacuum pump for an automobile. The pump comprises a motor assembly, a shell, a stator component, a rotor and a pressing cover, wherein the shell is provided with an air inlet and an air outlet; the stator component and an output shaft of the motor assembly form radial off-center; the rotor is in sliding connection with blades which can be driven to rotate in the stator component by the motor assembly; the shell and the pressing cover form a closed buffer cavity, and air enters the closed buffer cavity through the air inlet and is discharged from the air outlet; the stator component comprises a stator seat, a stator and a stator cover in sequence, the stator seat is provided with an air inlet slot communicated with the air inlet of the shell, and the stator cover is provided with an air outlet slot communicated with the closed buffer cavity and the air outlet of the shell; and the axial width of the stator corresponds to the blades. The pump can meetthe vacuum degree needed when the automobile brakes; and the motor assembly is connected with an external induction power supply, in braking, the power supply is connected so as to generate vacuum absorption force when the needed vacuum degree is reduced to a certain value, so that the pump is used for compensation when the vacuum degree needed to brake the automobile is not enough, and can make the automobile achieve the best braking effect.

Description

technical field [0001] The invention relates to an electric vacuum pump for automobiles. Background technique [0002] The vacuum pump is directly connected with the drive shaft of the engine (or with the alternator). When the vacuum suction is lower than a certain value, the drive shaft of the engine drives the rotor of the vacuum pump to run, and the air inhaled by the air inlet is compressed in the inner cavity of the pump. The air port is exhausted, thereby generating vacuum suction to provide for the work of automobile brakes. Such as Figure 12 Shown is the structural schematic view of the existing vane rotary vacuum pump, the inner wall of which is a cylindrical cylinder 91 is equipped with a cylindrical rotor 92, the cylinder is provided with an air inlet 93 and an air outlet 94, the rotor 92 The central axis is separated from the central axis of the cylinder 91 by a predetermined amount. Several vane grooves 95 are provided in the rotor 92 toward the central axis,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an electric vacuum pump for automobiles, which can effectively solve the problem that the front end of the blade of the vacuum pump is easily damaged due to friction with the air inlet and outlet, and the service life of the vacuum pump is reduced.

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