Drive with position-dependent switching device for signal evaluation of falling signals

A technology for a driving device and a switching device, which is used in vehicle cleaning, transportation and packaging, vehicle maintenance, etc., can solve problems such as unfavorable current consumption, undesired current consumption, and unreliable stop signals, so as to increase reliability and reduce current. consumption, the effect of reducing current consumption

Inactive Publication Date: 2017-10-17
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result would be unreliable generation of a stop signal
[0006] In addition, there is a permanent electrical contact in the stationary state, which leads to an undesired current consumption in the stationary state of the drive of the wiper arm
The current consumption of such a drive is particularly disadvantageous when, for example, a motor vehicle with such a drive for the wiper arm is not running, especially when the motor of the vehicle is in a parked or stationary position.

Method used

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  • Drive with position-dependent switching device for signal evaluation of falling signals
  • Drive with position-dependent switching device for signal evaluation of falling signals
  • Drive with position-dependent switching device for signal evaluation of falling signals

Examples

Experimental program
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Embodiment Construction

[0023] figure 1 A drive 100 for actuating a wiper arm of a windshield wiper system on a motor vehicle is shown. The drive device 100 is particularly suitable for driving a rear window wiper of a passenger car.

[0024] Drive 100 includes an electric motor 105 , which drives a transmission 110 via a drive shaft 115 . The electric motor 105 is typically a DC motor. The transmission 110 is not shown in detail; in the preferred embodiment it is a worm gear. As an alternative or in addition, the transmission 110 can comprise, for example, elements of a spur gear or a planetary gear. The drive shaft 115 is in figure 1 The center extends upwardly from the transmission 110 . In this region, the drive shaft 115 traverses the space formed by the cover plate 120 . The cover 120 is connected to the transmission 110 and serves to protect the components accommodated in the interior of the cover 120 . A recess is inserted into the cover plate 115 at the top, through which recess the d...

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PUM

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Abstract

The drive device (100) has an electric motor (105), a gearbox (110) with a drive shaft (115) for connection with the wiper arm, and a switching device for generating a signal with falling signal flank. The switching device has a switching recess (135) coupled with the drive shaft, and a contact spring (155), which is removed from a contact surface (150) through the switching recess. The electrical connection between a contact portion (165) of the contact spring and the contact surface is interrupted depending on the position of the drive shaft.

Description

technical field [0001] The invention relates to a drive for a wiper arm. In particular, the invention relates to a drive having a drive shaft for a wiper arm and a switching device for controlling the drive as a function of the position of the drive shaft. Background technique [0002] Small electric drives, for example for operating the wiper arms of vehicle windshield wiper devices, generally comprise an electric motor with a downstream supporting gear comprising a drive shaft for driving the wiper arm. In order for the drive device to ensure that the wiper arm is in the rest position and does not obstruct the view of the vehicle occupants when it is stopped, the drive device includes a switching device which can emit an electrical signal from which it can be deduced that the wiper arm is in the rest position. in the stop position. If the drive is stopped, for example by the driver of the vehicle, the electric motor is not switched off until the wiper arm has reached the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60S1/08
CPCB60S1/166
Inventor M.赖特
Owner ROBERT BOSCH GMBH
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