US 11,680,956 B2
Rotation detection device
Kazuhiko Tomita, Tokyo (JP)
Assigned to PROTERIAL, LTD., Tokyo (JP)
Filed by Hitachi Metals, Ltd., Tokyo (JP)
Filed on Jul. 20, 2021, as Appl. No. 17/380,463.
Claims priority of application No. JP2020-125899 (JP), filed on Jul. 23, 2020.
Prior Publication US 2022/0026458 A1, Jan. 27, 2022
Int. Cl. G01P 3/44 (2006.01)
CPC G01P 3/44 (2013.01) 7 Claims
OG exemplary drawing
 
1. A rotation detection device, comprising:
a detected member being mounted to a rotating member and being configured to rotate integrally with the rotating member; and
a sensor section being arranged to face the detected member,
wherein the sensor section comprises two magnetic sensors comprising a first magnetic sensor including a first detection section and a second magnetic sensor including a second detection section, each of the first detection section and the second detection section comprising a magnetism detection element for detecting a magnetic field from the detected member, and a housing portion comprising a resin mold provided to collectively cover the two magnetic sensors and having a facing surface facing the detected member,
wherein the first and second detection sections of the two magnetic sensors are separated from each other,
wherein a minimum distance between the first and second detection sections of the two magnetic sensors is 0.05 mm or more and 2.00 mm or less,
wherein the resin mold enters into a space between the first and second detection sections of the two magnetic sensors,
wherein the first detection section and the second detection section are arranged side-by-side along a rotational axis line direction of the rotating member, and
wherein the first detection section is tilted with respect to the second detection section.