초록 ▼

In a rear suspension system of an automobile having a general construction of the double wishbone type including a lower arm pivotably connected with an axle hub at a position below an axle axis via front and rear outboard pivot joints and with a vehicle frame via front and rear inboard pivot joints

In a rear suspension system of an automobile having a general construction of the double wishbone type including a lower arm pivotably connected with an axle hub at a position below an axle axis via front and rear outboard pivot joints and with a vehicle frame via front and rear inboard pivot joints, with the rear inboard pivot joint being positioned substantially inboard relative to the front inboard pivot joint, with each of the pivot joints including an elastic bush allowing a slight elastic resiliency of the joint in three dimensional directions, at least one of the bushes of the front inboard and front and rear outboard pivot joints has a non-uniformity of modulus of elasticity as viewed in a cross section perpendicular to its pivot axis such that the modulus of elasticity is lower along a first inclination against horizontality of ascending toward outboard than along a second against horizontality of descending toward outboard.

대표청구항 ▼

[ What is claimed is:] [1.] A rear suspension system of an automobile, comprising:an axle hub including a rotatable axle for supporting either a rear right or a rear left wheel and a brake means for selectively braking rotation of said axle;a substantially horizontal lower arm having front and rear

[ What is claimed is:] [1.] A rear suspension system of an automobile, comprising:an axle hub including a rotatable axle for supporting either a rear right or a rear left wheel and a brake means for selectively braking rotation of said axle;a substantially horizontal lower arm having front and rear outboard ends each pivotably connected with said axle hub at a position below said axle via a pivot joint so as to allow a relative pivotal movement therebetween around a substantially horizontal common pivot axis connecting central points of said front and rear outboard pivot joints, and front and rear inboard ends each pivotably connected with a vehicle frame via a pivot joint so as to allow a relative pivotal movement therebetween around a substantially horizontal common pivot axis connecting central points of said front and rear inboard pivot joints, said rear inboard pivot joint being positioned substantially inboard relative to said front inboard pivot joint, said front inboard pivot joint having a pivot axis substantially aligned with said common pivot axis connecting the central points of said front and rear inboard pivot joints, while said rear inboard pivot joint having a pivot axis substantially extending in the longitudinal direction of the automobile, with each of said pivot joints including an elastic bush allowing a slight elastic resiliency in three dimensional directions; anda substantially horizontal upper arm having an outboard end pivotably connected with said axle hub via a pivot joint so as to allow a relative pivotal movement therebetween around a substantially horizontal pivot axis and an inboard end pivotably connected with the vehicle frame via a pivot joint so as to allow a relative pivotal movement therebetween around a substantially horizontal pivot axis;wherein at least one of said bushes of said front inboard pivot joint and said front and rear outboard pivot joints of said lower arm has a non-uniformity of modulus of elasticity as viewed in a cross section perpendicular to the pivot axis thereof such that the modulus of elasticity is lower along a first inclination against horizontality of ascending toward outboard than along a second inclination against horizontality of descending toward outboard.