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Angle-measuring device for a rotationally driven linear actuator

A technology of angle measurement device and linear actuator, which is applied in the direction of linear/angular velocity measurement, measurement device, transmission device, etc., can solve the problems of high running quality, high mechanical requirements, high stop strength, etc., and achieve the effect of low cost

Active Publication Date: 2018-03-27
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here too, it is disadvantageous that the mechanical demands on such an actuator are particularly high, since high running qualities and high stop strengths are required for the reference stop

Method used

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  • Angle-measuring device for a rotationally driven linear actuator
  • Angle-measuring device for a rotationally driven linear actuator
  • Angle-measuring device for a rotationally driven linear actuator

Examples

Experimental program
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Embodiment Construction

[0065] exist figure 1 The angle measuring device 1 in the linear actuator 2 is shown in , and here it is shown in section. In this case, a drive spindle which forms the linear actuator element 6 translates in translation along the axis of rotation 4 of the drive 5 , ie can move from left to right and back in this view. In this case, the drive 5 has a stator 19 which is fixed in rotation and by means of which a rotor 20 can be rotated in a controlled manner about the axis of rotation 4 . The rotor element 3 is rotatably fixed to the rotor 20 , ie co-rotatably. This rotation of the rotor 20 can be converted into a translational movement of the linear actuator element 6 , here the drive spindle, for example by means of a planetary roller gear. The angle measuring device 1 here comprises a ring magnet 12 , a first counter-magnet 13 and a second counter-magnet 14 , which together form the measuring magnet arrangement 7 . The ring magnet 12 here preferably has a polarity, ie a ma...

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Abstract

The invention relates to an angle-measuring device for a rotationally driven linear actuator, in particular for a clutch actuator, which has at least the following components: - a rotor element whichhas an axis of rotation and rotates concentrically with a rotor of a rotatory drive for an axially movable linear actuator element; - a first measurement magnet arrangement which is fixed relative tothe rotor element and has a polarization, the polarization being oriented in such a way that the magnetic field lines can change with a rotation of the rotor element so as to enable the angle to be precisely determined from at least one measurement position; - at one of the measuring positions, a 360-degree sensor for measuring angular positions based on the measurement magnet arrangement; at oneof the measurement positions, a revolution-counting sensor for counting an absolute number of revolutions carried out based on the measurement magnet arrangement. The angle-measuring device proposed here ensures fail-safe reading out of the absolute travel position of, for example, a master piston of a hydrostatic clutch actuator and has low space requirements.

Description

technical field [0001] The invention relates to an angle measuring device for a rotationally driven linear actuator and a rotationally driven linear actuator, in particular for a clutch actuator, a clutch actuator and a friction actuator, in particular for a motor vehicle clutch. Background technique [0002] Linear actuators, in particular spindle actuators, are known from the prior art for actuating devices of hydrostatic output units, in particular for friction clutches of motor vehicles. For example, hydrostatic output units are known as clutch actuators for hydraulically actuating friction clutches, which include master cylinders of hydrostatic operating systems for this purpose. In hydrostatic clutch actuators, an active cylinder is usually provided for receiving the hydraulic fluid, wherein the receiving volume can be changed by means of the active piston. The active piston moves in translation in the active cylinder, so that the accommodation volume of the active c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/14G01P3/487F16D48/00
CPCG01D5/145F16D48/064F16D2500/1024F16D2500/3021F16D2300/18F16D2025/081F15B7/08F16D23/12F16D2023/123F16H25/2015F16H2025/2078
Inventor 马库斯·迪特里希拉斯洛·曼彼得·格雷布
Owner SCHAEFFLER TECH AG & CO KG
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