US 12,103,632 B2
Personal mobility and control method thereof
Ilsun Song, Seongnam-si (KR); Donghee Seok, Suwon-si (KR); Duck Young Kim, Seongnam-si (KR); Hee Jin Ro, Seoul (KR); and Yocheol Jang, Suwon-si (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Sep. 1, 2021, as Appl. No. 17/464,129.
Claims priority of application No. 10-2020-0173314 (KR), filed on Dec. 11, 2020.
Prior Publication US 2022/0185421 A1, Jun. 16, 2022
Int. Cl. B62K 21/14 (2006.01); B62K 3/00 (2006.01); B62K 21/16 (2006.01); B62K 21/20 (2006.01)
CPC B62K 21/14 (2013.01) [B62K 3/002 (2013.01); B62K 21/16 (2013.01); B62K 21/20 (2013.01); B62K 2202/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A personal mobility comprising:
a main body;
a steering shaft rotatably coupled to the main body;
a steering limiting device configured to limit rotation of the steering shaft;
a posture sensor provided to detect a change in posture of the main body; and
a controller configured to selectively generate a control signal to control an operation of the steering limiting device to limit the rotation of the steering shaft when the controller determines that the posture of the main body changes at a speed exceeding a predetermined speed,
wherein the steering limiting device includes:
a housing provided on a shaft support portion connected to the main body for rotatably supporting the steering shaft and enclosing a circumference of the steering shaft, wherein the housing includes a fluid accommodating groove opened toward an external surface of the steering shaft;
a magneto-rheological (MR) fluid accommodated in the fluid accommodating groove;
one or more protrusions protruding from the external surface of the steering shaft and positioned in the fluid accommodating groove; and
an excitation coil provided in the housing to selectively provide a magnetic field to the MR fluid according to the control signal of the controller.