公开(公告)号：US20220412420A1

公开(公告)日：2022-12-29

申请号：US17779660

申请日：2020-11-27

Applicant: NHK SPRING Co., Ltd.

Inventor： Takashi EGUCHI ,  Yusuke TANAKA

IPC: F16F1/18 ,  F16F3/02

Abstract: A leaf spring device includes a plurality of leaf springs, in which a restricting protrusion is provided on one leaf spring, a recessed part is formed on the other leaf spring, a first side surface of the restricting protrusion and a third side surface of the recessed part face each other in a plate width direction, a second side surface of the restricting protrusion and a fourth side surface of the recessed part face each other in the plate width direction, a first inclined surface is formed on one of the first and third side surfaces to be further away from the other thereof from a central portion toward a first direction, and a second inclined surface is formed on one of the second and fourth side surfaces to be further away from the other thereof from the central portion toward a second direction.

公开(公告)号：US20220212512A1

公开(公告)日：2022-07-07

申请号：US17610687

申请日：2020-05-25

Applicant: NHK SPRING CO., LTD.

Inventor： Shinji IINO ,  Yusuke TANAKA ,  Yosuke KAWAI

IPC: B60G11/08 ,  B60G11/10

Abstract: The suspension device according to the present invention is provided with a leaf spring extending in a belt shape, a first arm, a second arm, and a coupling member for rotatably coupling the first arm and the second arm, wherein: a first holding part for holding one end of the leaf spring and a second holding part for holding the other end of the leaf spring are provided; and the first and second arms each support the leaf spring by at least one portion that is different from the one end or the other end of the leaf spring.

公开(公告)号：US20240424848A1

公开(公告)日：2024-12-26

申请号：US18708112

申请日：2022-11-01

Applicant: NHK SPRING Co., Ltd.

Inventor： Yusuke TANAKA ,  Takanori HAYASHI ,  Shinji IINO ,  Takamichi SANO

IPC: B60G11/04 ,  B60G11/12

Abstract: A leaf spring device includes a leaf spring main body, a first eye portion, a second eye portion provided, and a connection piece, the first eye portion is connected to a vehicle body to be rotatable around a first axis, the second eye portion is connected to the connection piece to be rotatable around a second axis, a central region of the leaf spring main body supports an axle, the leaf spring main body is provided to be flexibly deformable upward, and a connection portion of the leaf spring main body, at which the leaf spring main body is connected to the second eye portion, is urged by an elastic restoring force of the connection piece in a direction in which the connection portion is displaced along the longitudinal direction at an initial stage of a process in which the leaf spring main body is flexibly deformed upward.

公开(公告)号：US20240326535A1

公开(公告)日：2024-10-03

申请号：US18739486

申请日：2024-06-11

Applicant: NHK SPRING CO., LTD.

Inventor： Yusuke TANAKA ,  Takanori HAYASHI ,  Shinji IINO ,  Takamichi SANO

IPC: B60G11/44

CPC classification number: B60G11/44

Abstract: A suspension device includes a pair of leaf springs and a torsion bar, one of a front end portion and a rear end portion of the torsion bar is supported by the axle in a state where movement in the front-rear direction and the left-right direction is restricted, one of a front end portion and a rear end portion of the leaf spring is connected to the vehicle body to be rotatable around a first axis extending in the left-right direction, the other thereof is connected to the vehicle body to be swingable in the front-rear direction around an axis extending in the left-right direction, and the other of the front end portion and the rear end portion of the torsion bar is supported by the vehicle body to be movable in the front-rear direction in a state where movement in the left-right direction is restricted.

公开(公告)号：US20240066936A1

公开(公告)日：2024-02-29

申请号：US18494235

申请日：2023-10-25

Applicant: NHK SPRING CO., LTD.

Inventor： Shinichi NISHIZAWA ,  Takeshi FURUSE ,  Senri MORIYAMA ,  Yusuke TANAKA

IPC: B60G7/04 ,  B60G7/00 ,  F16F1/12

CPC classification number: B60G7/04 ,  B60G7/001 ,  F16F1/12 ,  B60G2202/12

Abstract: A coil spring includes a wire rod including a round section portion and a flat section portion. The round section portion includes a first cross section whose cross section is round. The flat section portion includes a second cross section that is flat. The second cross section has a width greater than or equal to the diameter of the first cross section and a thickness less than the width. A polar moment of inertia of area of the second cross section is smaller than that of the first cross section. A variable section portion is formed between the round section portion and the flat section portion. The variable section portion changes its cross section from circular to flat from the round section portion towards the flat section portion.