US 11,890,906 B2
Vehicle suspension spring device and vehicle suspension system having the same
Hyun Soo Kim, Anyang-si (KR); Jae Hun Kim, Hwaseong-si (KR); Young Ha Kim, Yongin-si (KR); Woo Bin Song, Yongin-si (KR); Dong Won Kim, Gimpo-si (KR); and Jun Sung Goo, Suwon-si (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); KOLONGLOTECH. INC, Seoul (KR); and HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); KOLONGLOTECH. INC, Seoul (KR); and HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed on Nov. 14, 2022, as Appl. No. 17/986,599.
Claims priority of application No. 10-2021-0170337 (KR), filed on Dec. 1, 2021.
Prior Publication US 2023/0166573 A1, Jun. 1, 2023
Int. Cl. B60G 11/08 (2006.01); F16F 1/368 (2006.01); B60G 7/00 (2006.01); B60G 3/10 (2006.01)
CPC B60G 11/08 (2013.01) [B60G 3/10 (2013.01); B60G 7/001 (2013.01); F16F 1/3683 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A vehicle suspension spring device comprising:
a leaf spring unit including a plurality of leaf springs disposed and connected in a lateral direction of a vehicle, and a connection part provided to connect the plurality of leaf springs;
a pair of first coupling parts provided at opposite ends of the leaf spring unit in a longitudinal direction and rotatably coupled to a pair of axles on which opposite wheels of the vehicle are mounted; and
a pair of second coupling parts provided at two points between the opposite ends of the leaf spring unit in the longitudinal direction to be rotatably coupled to a subframe of the vehicle,
wherein a first coupling part of the pair of first coupling parts is provided at an outer end of an outermost leaf spring of the plurality of leaf springs,
wherein a second coupling part of the pair of second coupling parts is provided between the plurality of leaf springs,
wherein the connection part includes a pair of connection members provided at ends of the plurality of leaf springs corresponding to each other and coupled to each other, and a fastening member for coupling the connection members,
wherein the fastening member is fastened in a front-rear direction of the vehicle to couple the connection members,
wherein an elastic body is provided to elastically support the connection members in the front-rear direction of the vehicle, and includes a first rubber bushing installed in the connection part to support the fastening member,
wherein a rotation shaft is coupled to the subframe in the front-rear direction of the vehicle,
wherein the second coupling part includes a second rubber bushing provided to rotatably support the rotation shaft, and a bushing coupling hole provided on the leaf spring unit so that the second rubber bushing is coupled, and
wherein the second rubber bushing elastically supports the leaf spring unit around the bushing coupling hole and the subframe.