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Automotive auxiliary unit with electric motor

A technology for automobile auxiliary and electric motors, applied in the direction of electrical components, electric components, electromechanical devices, etc., can solve problems such as large assembly workload or additional components, etc., to improve and increase friction characteristics, reduce costs, and avoid progressive wear and tear. Effect

Pending Publication Date: 2021-11-26
PIERBURG PUMP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, prior art devices require considerable assembly effort or additional parts

Method used

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  • Automotive auxiliary unit with electric motor
  • Automotive auxiliary unit with electric motor
  • Automotive auxiliary unit with electric motor

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Experimental program
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Embodiment Construction

[0026] Such as figure 1 As shown, the vehicle auxiliary unit 10 according to the invention comprises an electric motor 16 driving a pump rotor 14 . The pump rotor 14 is preferably part of a positive displacement pump, such as a vane pump, which pumps air to create a vacuum. The mechanical connection between the electric motor 16 and the pump rotor 14 takes place via the rotor shaft 12 . The electric motor 16 includes a motor stator 18 , a motor rotor 11 and a rotor shaft 12 .

[0027] The motor stator 18 is arranged in a motor case not shown in the drawings, and includes ten permanent magnetic poles 29 . Since the fixed part of the electric motor 16, the motor stator 18, is stationary and fixed to the motor housing, the electric motor 16 of the present invention is designed and operated as a so-called internal rotor motor.

[0028] The motor rotor 11 comprises a sheet metal group 22 consisting of a number of identical metal sheets 22'. Each ferromagnetic metal sheet 22&apo...

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Abstract

The invention is directed to an automotive auxiliary unit (10) with an electric motor (16) comprising a motor stator (18), a rotatable metallic rotor shaft (12) defining a rotor fixation section (34) provided with material bulgings (26; 26') at the shaft surface (32), and a motor rotor (11) co-rotatably fixed to the rotor shaft (12) by pressing at the rotor fixation section (34), wherein the material bulgings (26; 26') at the shaft surface (32) are provided by laser engraving. The proposed automotive auxiliary unit provides a reliable and cost-effective fixation arrangement for mounting the motor rotor at the rotor shaft so that high torque transmission for displacement pumps is realized.

Description

technical field [0001] The invention relates to a vehicle auxiliary unit, preferably a vehicle vacuum pump for generating a vacuum. Background technique [0002] For example, such an auxiliary unit in a car may be a vane unit vacuum pump for providing an absolute pressure of about 100 mbar to other devices such as a brake booster. Conventional automotive auxiliary units are mechanically driven by the internal combustion engine of the motor vehicle. In order to be independent of the rotational speed of the internal combustion engine, electric auxiliary units, for example as vacuum pumps driven electrically by an electric motor, are becoming more and more common. The electric motor is provided with a rotor shaft and a separate motor rotor fixed to the shaft. [0003] DE 10 2005 046 285 A1 and DE 10 2016 216 476 A1 disclose two different devices for securely mounting the motor rotor with the rotor shaft. In DE 10 2005 046 285 A1 the rotor shaft is provided with a gear-shaped...

Claims

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Application Information

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IPC IPC(8): H02K1/28
CPCH02K1/28F04B35/04F04B37/14H02K7/003F04D25/06F04D29/20
Inventor S.施努尔N.S.阿尔-哈桑S.鲁斯T.格伦P.哈根M.皮欧特罗夫斯基S.伊尔默
Owner PIERBURG PUMP TECH