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Electric motors for actuating drives or wiper drives of motor vehicles

A technology for electric motors and motor vehicles, which is applied to the cleaning of electromechanical devices, electric components, vehicles, etc., can solve the problems of reducing the efficiency of the worm drive mechanism, the wear of the free end of the armature shaft, and reducing the diameter of the worm tooth root circle. Easy to make, compensate for shape error, good effect of meshing characteristics

Inactive Publication Date: 2015-11-25
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This inevitably leads to a reduction in tooth strength and to poorer action
In addition, this limits the possibility of reducing the diameter of the root circle of the worm, thereby reducing the efficiency of the worm drive, which is determined by the pitch angle of the worm.
[0005] In addition, the support on the cylindrical shaft end presents the risk that the free end of the armature shaft becomes stuck in the receptacle of the transmission housing when the armature shaft is tilted, due to the so-called edge running (Kantenlüfer) May cause significant wear on the free end of the armature shaft

Method used

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  • Electric motors for actuating drives or wiper drives of motor vehicles
  • Electric motors for actuating drives or wiper drives of motor vehicles
  • Electric motors for actuating drives or wiper drives of motor vehicles

Examples

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Embodiment Construction

[0020] figure 1 Shown is an electric motor for an adjustment drive or wiper drive of a motor vehicle, which has an armature shaft 1 , one end of which is rotatably mounted in a transmission housing 2 , and its other free end 3 There is a worm 4 for driving a worm or helical gear (likewise not shown) arranged in the gear housing 2 . In order to achieve support in the case of large deflections (which in particular lead to a coaxial deviation between the transmission housing 2 and the armature shaft 1 ), the free end 3 of the armature shaft 1 is arranged in a housing formed in the transmission housing 2 . Body 5 and supported therein. Here, the free end 3 of the armature shaft 1 is formed cylindrically. In this exemplary embodiment, the receiving body 5 is also designed cylindrically, which has the result that the free end 3 becomes stuck in the receiving body 5 when the axes of the armature shaft 1 and the receiving body 5 are strongly inclined relative to one another. So-cal...

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Abstract

The motor has an armature shaft (1) whose end is rotatably housed in a gearbox (2). A free end (3) of the armature shaft carries a screw (4) to drive a worm wheel installed in the gearbox. The free end is arranged in a housing (5) formed in the gearbox to support displacements. The armature shaft and / or the housing include a shim element (7) arranged at the free end or in the housing. The free end is supported against the housing by using the shim element when the free end is shifted, where the shim element is in a shape of barrel or cap.

Description

technical field [0001] The invention relates to an electric motor for an adjustment drive or a wiper drive of a motor vehicle, which has an armature shaft, one end of which is rotatably mounted in a transmission housing and the other free end of which has a worm for driving a drive arranged in a transmission Worm wheel or helical gear in the housing, wherein the free end of the armature shaft is arranged in a receptacle formed in the transmission housing for support in the event of greater deflection. Background technique [0002] Such electric motors with corresponding armature shafts are generally known. The armature shafts of electric motor vehicle adjustment drives and wiper drives not only serve to accommodate and support the armature, but also serve as transmission elements, since the free end of the armature shaft is formed with a non-cutting or cutting worm screw or inserted into the free shaft end. on the corresponding worm. Forces are introduced into the armature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K5/167
CPCB60S1/166
Inventor J·莫恩希H-P·多姆施
Owner ROBERT BOSCH GMBH
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