Abstract:
An axle/suspension system for a wheeled vehicle, in which the vehicle has a frame, includes an integral arm structure that includes an attachment member for connecting the integral arm structure to the vehicle frame. A flexible transition member is connected to and extends from the attachment member and a truss structure is connected to and extends from the transition member. The flexible transition member may be generally curved or angular and enables pivotal movement of the integral arm structure and cooperates with the truss structure to distribute forces encountered by the axle/suspension system. The truss structure may include a truss member that replaces a conventional axle tube. Optionally, two axle/suspension integral arm structures may be used to capture a conventional axle tube.
Abstract:
An axle/suspension system for the trailer of a tractor-trailer vehicle combination includes a device for leveling the trailer floor. A selected one of a pair of suspension assemblies of the system is pivotally attached to a vehicle frame bracket or hanger having vertically-oriented oval sidewall openings and vertically-spaced horizontally extending eccentric collar guide tabs. The frame hanger, upon a certain manual rotational adjustment of an eccentric alignment collar with a breaker bar, causes a bolt which pivotally attaches the suspension assembly beam to the hanger to be vertically adjusted, which in turn causes vertical adjustment of the beam and the axle attached to the beam, resulting in the raising or lowering of a sidewardly leaning trailer floor to a generally horizontally level position.
Abstract:
A movable subframe or slider for semi-trailers includes a pair of spaced-apart, parallel and longitudinally extending main members. The main members are interconnected by a pair of longitudinally spaced, parallel and transversely extending horizontal cross members, a horizontally-disposed cross-brace structure, and a pair of longitudinally-spaced, parallel and vertically-disposed cross-brace structures. One or more axle/suspension systems are suspended from hangers which are mounted on and depend from the slider structure, and a retractable pin mechanism enables selective positioning of the slider relative to the trailer body for optimum load distribution and trailer versatility during vehicle operation. The integral slider structure supports the one or more axle/suspension systems, so that concentrated loads imposed on the slider via the axle/suspension systems during operation of the vehicle generally are dissipated throughout the entire slider structure.
Abstract:
A sensor system for actuating the lifting of a steerable axle (20) of a wheeled vehicle (10) includes at least one proximity switch (62) mounted on a first structure of the wheeled vehicle and at least one magnet (66) mounted on a second structure of the wheeled vehicle, wherein at least one of the first ( 54, 82) and second (58, 90) structures pivots relative to the other structure. When at least one of the first (54, 82) and second (58, 90) structures moves to a predetermined position relative to the other structure, the at least one proximity switch (62, 94) and the at least one magnet (66, 102) are aligned in close proximity, thereby activating the proximity switch (62, 94) to, in turn, actuate a lift mechanism for the steerable axle (20) .
Abstract:
A distributed compliance air-ride axle/suspension system includes an integral structure preferably formed of a lightweight composite material, replacing traditional beams and an axle. The composite structure includes a plurality of plates of various sizes and shapes, with the size, shape and arrangement of the plates being determined by the load capacity model of a specific vehicle application. Traditional axle spindle ends are mounted on the integral plate structure, together with pivot bushings, air springs, and shock absorbers, to complete the air-ride axle/suspension system. The system in turn is pivotally mounted on frame brackets of a heavy-duty vehicle such as a semi-trailer or dump truck. Forces, loads and/or stresses imposed on the axle/suspension system during vehicle operation are distributed generally throughout the composite structure to achieve the desired structural roll compliance of the axle/suspension system for the particular application.
Abstract:
A steerable lift axle/suspension system (10) for a heavy-duty vehicle such as a semi-trailer or a straight truck, includes a pair of steering dampers (22) and a backup lock (23). The steering dampers (22) minimize shimmy of the steerable wheels during over-the-road operation of the vehicle, and straighten the wheels on such steerable axle/suspension systems having a lift feature (21) when the system is raised. The backup lock (23) secures the wheels in a straightened position when such liftable systems are raised and the vehicle is backing up, to minimize vehicle handling problems. The steering dampers (22) and backup lock (23) are mounted at a location off the axle tube (41) of the axle (14) and on the axle/suspension system beams (12), to eliminate stress on the axle (14) that would otherwise be caused by welded attachment of such components to the axle tube (41), thereby enabling use of a less robust, more lightweight axle tube (41).
Abstract:
A vehicle suspension system (21) features lower control rods (31) pivotally connected at their leading ends to hangers (29) attached to side frame members (27). The rearward ends of the lower control rods (31) are attached to axle seats (33) at each end of the axle (25), which are connected to the axle (25). Air springs (43) and shock absorbers (49) are mounted between axle seats (33) and side frame members (27). The lower control rods (31) are inclined with their forward ends above their trailing ends. Some embodiments of the suspension feature upper control rods (53) with their forward ends pivotally attached to the two opposing truck side frame members (27). The rearward ends of the upper control rods (53) are attached to the top center of the axle (25) by either a bolt and bushing mount or a ball and socket mount so that the upper control rods (53) form a "V". The upper control rods (53) lay in a nearly horizontal plane.
Abstract:
A frame for a heavy-duty vehicle includes a pair of spaced-apart, parallel, elongated, and longitudinally-extending main members. At least a pair of transverse cross members extend between and are attached to the main members, and each one of at least a pair of hangers is attached to and depends from a respective one of the main members and/or the cross members. A component is disposed between each one of the hangers and its respective main member, or alternatively is incorporated into the hangers, for absorbing the energy that is created by an extreme event during vehicle operation, to reduce the possibility of damage to the main members and/or the cross members caused by movement of at least one of the hangers during the extreme event.
Abstract:
A frame or subframe for a tractor-trailer for supporting one or more axle/suspension systems includes a pair of spaced-apart, parallel, elongated, and longitudinally extending main members. At least one cross member structure extends between and is connected to the longitudinal main members using structural nodes. A bonding adhesive, or other suitable means of attachment, connects the cross member structure and the structural nodes to one another and to the main members. The structural nodes distribute loads encountered during vehicle operation generally over a relatively large area thereby generally reducing the concentration of such loadings at the connections, and assist in generally evenly distributing loads between the cross member structure and the main members to effectively react lateral, longitudinal, vertical, and racking loads. The combination of greater load distribution and reduced loading concentrations allows the structure to be constructed from lighter weight materials.
Abstract:
A movable subframe or slider box for tractor-trailers includes a pair of elongated, longitudinally-extending, spaced-apart, parallel main members, and a plurality of cross members which extend between and are attached to the main members to form a rigid slider box structure. The slider box includes a retractable pin mechanism for selectively positioning the slider box beneath the trailer. The slider box supports one or more axle/suspension systems which in turn support the vehicle wheels and tires. The slider box is free of hangers for pivotally mounting beams of the axle/suspension systems on the slider box. The beams instead are pivotally mounted directly on the main members. Each main member has an inverted generally U-shaped configuration which forms a channel, so that a bushing assembly end of each beam nests within the channel of its respective main member and is pivotally attached thereto.