Vehicle suspension system

• US 4,451,054 A
• Filed: 05/11/1982
• Issued: 05/29/1984
• Est. Priority Date: 05/11/1982
• Status: Expired due to Fees

• Current Assignee: William D. Allison
• Original Assignee: William D. Allison
• Inventors: Allison, William D.
• Primary Examiner(s): Peters, Jr., Joseph F.
• Assistant Examiner(s): Weaver, Ross
• Application Number:
  US06/377,084
• Time in Patent Office: 749 Days
• Field of Search: 280/719, 280/104, 280/680, 280/686, 280/781, 280/788, 267/47, 267/48, 267/52
• US Class Current: 280/104
• CPC Class Codes: B60G 21/04 mechanically
• CPC Class Codes: B60G 2202/11 Leaf spring
• CPC Class Codes: B60G 2206/605 Flexible constructions

Abstract

A vehicle suspension system which includes longitudinally extending suspension rails supporting the wheels of the vehicle with the rails being interconnected by a transverse beam and with transversley extending leaf spring assemblies. The leaf spring assemblies also are connected to the body or frame of a vehicle and loads imposed on any one of the wheels is transmitted through the rails, the transverse beam and the leaf spring assemblies to the remaining wheels of the vehicle.

Claims

1. A suspension system for the body of a wheeled vehicle comprising:

a pair of elongated longitudinally extending and spaced apart rails, said pair of rails each supporting ground engaging wheels at opposite ends, a transverse beam having opposite ends supported relative to said rails for oscillation of said rails about the axis of said transverse beam separately of each other, leaf spring means extending transversely of and having end parts extending outwardly of said rails, means connecting spaced portions intermediate of the ends of said leaf spring means to said rails, additional means connecting opposite ends of said spring means to opposite sides of said body whereby ground engaging loads and movement imposed on said wheels at one end of one of said rails is transmitted to wheels at the other end of said one of said rails and through said leaf spring means and said transverse beam to the wheels associated with said other rail, said wheels being simultaneously moveable in substantially parallel planes in response to displacement of any one of said wheels and said body being resiliently supported relative to said rails by said end parts of said leaf spring means.

2. The suspension system of claim 1 wherein said leaf spring means comprise leaf spring assemblies longitudinally spaced from each other.

3. The suspension system of claim 2 wherein said pair of leaf springs are disposed between said wheels disposed at opposite ends of said rails.

4. A suspension system of claim 1 wherein rails oscillate about said transverse beam in generally parallel vertical planes.

5. The suspension system of claim 4 wherein said transversely extending beam is disposed at a point substantially midway between said wheels.

6. The suspension system of claim 1 wherein a pair of wheels are supported adjacent each end of each one of said beams.

7. The suspension system of claim 6 wherein said pairs of wheels are supported by walking beam assemblies pivotally connected to said rails.

8. The suspension system of claim 1 wherein said means connecting said leaf spring means to said body and said beams include resilient bushing assemblies.

9. A suspension system for a vehicle comprising:

an unsprung portion including forward and rearward pairs of ground engaging wheels, a pair of elongated longitudinally extending and spaced apart rails each supporting a forward and rear ground engaging wheel at opposite ends thereof, said rails being disposed between said pairs of wheels and below the upper level of said wheels, and a transverse beam having opposite ends pivotally supported relative to said rails for osillation of said rails separately of each other about the axis of said transverse beam, a sprung portion in the form of a body having opposite side portions between forward and rearward wheels and substantially coextensive with the outer edges of wheels that are associated with each one of said rails and below the upper level of said wheels, leaf spring means operatively disposed between said sprung and unsprung portions and comprising a pair of leaf springs extending substantially horizontally and transversely of both of said rails and said body, means connecting each of said leaf spring means to said rails inboard of said body, and additional means connecting opposite ends of said leaf spring means to opposite side portions of said body whereby ground engaging loads and movement imposed on any one of said wheels is transmitted to the other wheels through said rails, said spring means and said beam and wherein said sprung portion is supported from said unsprung portion by the portions of said springs between said rails and said side portions of said body.

10. The suspension system of claim 9 wherein said means connecting said leaf spring means to said rails include a bracket connected to said rail and means engaging the underside and top of said spring means to confine the latter against vertical movement.

11. The suspension system of claim 9 wherein opposite ends of said rails are provided with beam extensions extending outwardly at an angle to said beams and to each other and said pairs of wheels are supported to the outer ends of said beam extentions.