US 12,074,501 B2
Motor-specific electromagnetic braking device
Masahiro Yamaguchi, Tokyo (JP)
Assigned to SANYO DENKI CO., LTD., Tokyo (JP)
Filed by SANYO DENKI CO., LTD., Tokyo (JP)
Filed on Jul. 21, 2022, as Appl. No. 17/870,482.
Claims priority of application No. 2021-123664 (JP), filed on Jul. 28, 2021.
Prior Publication US 2023/0036610 A1, Feb. 2, 2023
Int. Cl. F16D 59/02 (2006.01); B60T 13/74 (2006.01); H02K 7/102 (2006.01)
CPC H02K 7/1023 (2013.01) [B60T 13/748 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A motor-specific electromagnetic braking device comprising:
a housing configured to rotatably house a rotating shaft portion of a motor;
a hub attached to an outer perimeter of the rotating shaft portion;
a friction member configured to be rotatable together with the hub and movable in a direction of a rotation axis,
wherein the friction member includes a plate-shaped portion, and a friction portion provided to an outer-diameter portion of the plate-shaped portion,
the hub is provided, on both sides in the direction of the rotation axis, with a pair of holding plates covering at least a part of the friction member,
inner-diameter portions of the pair of holding plates are fixed to the hub, and
each of the holding plates has a saucer shape with a hole in the center through which the rotating shaft portion and the hub are inserted;
an elastic member configured to bring the friction member and a contact portion of the housing into contact with each other and separate the friction member and the contact portion from each other; and
an electromagnet,
wherein the electromagnet separates the friction member and the contact portion from each other when the elastic member brings the friction member and the contact portion into contact with each other, whereas the electromagnet brings the friction member and the contact portion into contact with each other when the elastic member separates the friction member and the contact portion from each other.