US 12,072,258 B2
Torque sensor unit comprising a magnetic shield
Roman Ayer, Uster (CH); Peter Knoll, Lindau (DE); Sándor Kovács, Vecsés (HU); Peter Szabo, Budapest (HU); and Tivadar Kristóf Tóth, Páty (HU)
Assigned to thyssenkrupp Presta AG, Eschen (LI); and thyssenkrupp AG, Essen (DE)
Appl. No. 17/435,179
Filed by thyssenkrupp Presta AG, Eschen (LI); and thyssenkrupp AG, Essen (DE)
PCT Filed Feb. 25, 2020, PCT No. PCT/EP2020/054904
§ 371(c)(1), (2) Date Aug. 31, 2021,
PCT Pub. No. WO2020/178078, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10 2019 105 234.3 (DE), filed on Mar. 1, 2019.
Prior Publication US 2022/0146347 A1, May 12, 2022
Int. Cl. G01L 3/10 (2006.01); B62D 3/12 (2006.01); B62D 15/02 (2006.01); G01L 5/22 (2006.01)
CPC G01L 3/104 (2013.01) [B62D 3/12 (2013.01); B62D 15/022 (2013.01); G01L 5/221 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A torque sensor unit comprising:
a ring magnet that is connectable in a rotationally fixed manner to a first partial shaft and is disposed concentrically relative to a longitudinal axis;
two first magnetic flux conductors that are connectable to a second partial shaft, that are disposed in a magnetic field emanating from the ring magnet, and that conduct magnetic fluxes;
a spatially fixed sensor unit having two second magnetic flux conductors and a magnetic sensor that is disposed on a printed circuit board, wherein the two second magnetic flux conductors and the magnetic sensor are received in a sensor housing of the spatially fixed sensor unit, wherein the spatially fixed sensor unit is configured to detect a change in a rotational angle between the first and second partial shafts by measuring magnetic flux density between the two first magnetic flux conductors;
a second housing that surrounds the ring magnet, the two first magnetic flux conductors, and the spatially fixed sensor unit; and
a magnetic shield that surrounds at least part of the torque sensor unit at least partially circumferentially relative to the longitudinal axis, the magnetic shield being disposed between a housing cover, which closes the second housing, and the second housing in a direction of the longitudinal axis, wherein the magnetic shield includes two limbs that each have first and second sides, wherein the second sides extend parallel to the longitudinal axis and the first sides are generally perpendicular to the longitudinal axis, wherein the two limbs are connected to one another exclusively by way of one of the first sides or one of the second sides.