Mazda Motor Corporation

Molten Corporation

Haruaki Iseri

Masaya Hiramatsu

Hiroyuki Okamoto

Susumu Sano

Eiji Okada

Kazuhiro Okuyama

Tadashi Yoshimura

Hiroki Kimura

Hiromi Miwade

Takahiko Shigyo

Naoki Kurata

Ryo Ogawa

Tomohiro Tuji

Masayuki Mochizuki

Tetsuya Shirosaka

The bushing includes an outer cylinder, an inner cylinder, and an elastic body therebetween. The outer cylinder has a central recess portion formed in a curved shape. The inner cylinder has a central convex portion being formed in a curved shape. A distance between a vertex of the central recess portion and the vertex of the central convex portion is smaller than a distance between a point other than the vertex of the central recess portion and a point at which a straight line extending from the point other than the vertex of the central recess portion to an intersection point of the perpendicular line and the axis of the inner cylinder intersects the central convex portion.

Bushing and vehicle suspension device

The bushing includes an outer cylinder, an inner cylinder, and an elastic body therebetween. The outer cylinder has a central recess portion recessed from the inner peripheral surface in the radial direction at the central portion in the axial direction, and the thickness of both end portions is thicker than the thickness of the central portion. The central recess portion is formed in a curved shape or having a curved and a straight shape. The inner cylinder has a central convex portion swelling from the outer peripheral surface in the radial direction at a position corresponding to the central recess portion. The maximum outer diameter of the central convex portion is larger than the minimum inner diameter of the inner peripheral surface of the outer cylinder.

Provided is a vehicle suspension device capable of obtaining excellent steering stability and good riding comfort in conformity to a tire longitudinal spring constant. The suspension device () comprises: an upper arm (); a lower arm (); a wheel support (); and a shock absorber () having an upper end attached to a vehicle body (B) of a vehicle and a lower end attached to the lower arm, wherein the upper arm and the lower arm are arranged such that a ratio &#x3b6;of a scuff change-based apparent damping coefficient Cto a critical damping coefficient Cof the suspension device becomes equal to or greater than a lower limit, under the condition that the vehicle is traveling straight ahead on a flat road at a given vehicle speed, wherein the scuff change-based apparent damping coefficient Cis obtained by dividing, by a stroke speed of a wheel, an up-down directional component of a vehicle width-directional force arising on a ground contact surface of the wheel due to a vehicle width-directional displacement of the wheel occurring along with a stroke of the wheel, and the lower limit is set such that it becomes larger as a tire longitudinal spring constant of the wheel becomes smaller.

Vehicle suspension device

Growing community of inventors

Hiroshima, Japan

Haruaki Iseri