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Linear actuator for a rear axle steering device on a motor vehicle

A linear actuator, linear technology, applied in the use of electric/magnetic devices to transmit the direction of sensing components, measuring devices, converting sensor outputs, etc., can solve the problems of expensive magnets, demagnetization, etc.

Pending Publication Date: 2022-07-22
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Magnets for inductive linear position sensors required for position transmitters are expensive
At high ambient temperatures, there is a risk of undesired demagnetization, for example in the case of motor vehicles where the exhaust pipe is close to the linear actuator and the magnets are heated to an impermissible level

Method used

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  • Linear actuator for a rear axle steering device on a motor vehicle
  • Linear actuator for a rear axle steering device on a motor vehicle
  • Linear actuator for a rear axle steering device on a motor vehicle

Examples

Experimental program
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Effect test

Embodiment Construction

[0046] figure 1 A longitudinal section through a linear actuator of a rear axle steering device on a motor vehicle is shown. The linear actuator has a housing 1 in which a push rod 2 is guided displaceably along a longitudinal axis. The pushrod 2 passes through the housing 1 at the end of the housing to which a head or fork head 7 is screwed to accommodate a wheel control arm, not shown.

[0047] The electric motor 3 drives the screw drive 4 by means of a toothed belt, not shown in more detail here, the nut 5 of which is driven in rotation by the toothed belt. The nut 5 engages with a threaded spindle 6 which is part of the push rod 2 . When the nut 5 is rotated, the threaded spindle 6, ie the push rod 2, is displaced relative to the housing 1 along its longitudinal axis.

[0048] An inductive linear travel sensor 8 ( figure 2 and image 3 ). The housing-side position receiver 9 is provided with a receiver section 10 along the longitudinal axis. The pushrod-side position...

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PUM

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Abstract

The invention relates to a linear actuator, the housing (1) of which encloses a tappet (2), which is guided in a displaceable manner along a longitudinal axis, and which has a linear travel sensor (8) for determining the position of the tappet (2), the housing-side position receiver (9) of the sensor comprises a receiver section (10) extending along the longitudinal axis, and the tappet-side position transmitter (11, 18, 21, 25, 28) of the sensor interacts with the position receiver (9) in a contactless manner. The inductive linear travel sensor (8) has a position emitter (11, 18, 21, 25, 28) made of an electrically conductive material, the emitter contour (16) of which is curved about at least one dimensional axis.

Description

technical field [0001] The present invention relates to a linear actuator, in particular for a rear axle steering device on a motor vehicle, which linear actuator has a push rod which is displaceable within a housing along a longitudinal axis way to be guided. Background technique [0002] A linear actuator according to the features of the preamble of claim 1 is known from DE 10 2017 208 101 A1 for a rear axle steering device on a motor vehicle. The push rod, which is guided displaceably along the longitudinal axis in the housing, is driven by an electric motor. In this application, the pushrod engages the wheel carrier. [0003] The magnetic-inductive linear travel sensor for determining the position of the push rod is provided with a position receiver arranged on the housing side, which position receiver comprises a receiver section extending along the longitudinal axis. The receiver section covers the actuation range of the linear actuator. The linear travel sensor is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/20
CPCG01D5/2026G01D5/202B62D5/0427B62D5/0445
Inventor 本杰明·凯撒马里奥·阿诺德
Owner SCHAEFFLER TECH AG & CO KG
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