Abstract:
A non-torque reactive air suspension exhibiting excellent roll stability characteristics is shown to include frame hangers (26) mounted to frame rails (20) extending longitudinally on opposite sides of a vehicle; wherein, the suspension includes longitudinally extending beams (28) are connected to the frame hangers (26) at one end and extend parallel to the frame rails (20), other ends of the beams (28) are joined by a crossbrace (32) extending laterally across the vehicle centerline; wherein each of the beams (28) having an axle pivot bore (36) to which an axle clamp assembly (38) is connected, the axle clamp assembly (38) clamping a drive axle housing (22) for the vehicle; wherein the axle pivot bore (36) is generally aligned with the drive axle (22); a control rod assembly (40) is connected to suspension; the control rod assembly (40) and the beams (28) formed a parallelogram configuration.
Abstract:
A vehicle alignment measurement apparatus includes a first reference member removably mountable on a kingpin of a trailer and a second reference member removably mountable on selected ones of the trailer frame rails typically used to lock a movable slider having front and rear axles in place beneath the trailer. A third reference member is removably mountable on selected ones of wheels mounted on the axles. A distance between the first reference member and the second reference member, which is perpendicular to the rail, is measured to determine the alignment of the frame rails relative to the kingpin. A distance between the first reference member and the third reference member, which is aligned with the axle centerline, is measured to determine the alignment of the front axle relative to the kingpin. A pair of the third reference members can be used to align the rear axle to the front axle.
Abstract:
A non-torque reactive air suspension exhibiting excellent roll stability characteristics is shown to include frame hangers mounted to frame rails extending longitudinally on opposite sides of a vehicle. Longitudinally extending beams are connected to the frame hangers at one end and extend parallel to the frame rails. At their other ends, the beams are joined by a crossbrace extending laterally across the vehicle centerline. In a central portion thereof, the beams have an axle pivot bore to which an axle clamp assembly is connected, the axle clamp assembly clamping a drive axle housing for the vehicle. The axle pivot bore is generally aligned with the drive axle. A control rod assembly is connected to suspension or frame components. Together with the beams, the control rod assembly forms a parallelogram configuration wherein the beams form the lower linkages of that configuration and the control rods included within the control rod assembly form the upper linkages of that configuration.
Abstract:
An axle/suspension system (40) for a wheeled vehicle, in which the vehicle has a frame (12), includes an integral arm structure (42) that includes an attachment member (50) for connecting the integral arm structure (42) to the vehicle frame (12). A flexible transition member (54) is connected to and extends from the attachment member (50) and a truss structure (56) is connected to and extends from the transition member (54). The flexible transition member (54) may be generally curved or angular and enables pivotal movement of the integral arm structure (42) and cooperates with the truss structure (56) to distribute forces encountered by the axle/suspension system (40). The truss structure (56) may include a truss member (72) that replaces a conventional axle tube. Optionally, two axle/suspension integral arm structures (92) may be used to capture a conventional axle tube.
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 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.
Abstract:
A control system 30 for a heavy-duty vehicle such as a dump-type straight truck 10 includes a portable radio frequency transmitter 34 and a radio frequency receiver 33. The radio frequency receiver 33 is operatively connected to a vehicle device or assembly which performs a function such as operation of the vehicle dump bed or raising and lowering of the vehicle axle/suspension system 20,21, so that the function can be controlled from the cab of the vehicle 11 by the radio frequency transmitter 34, and whereby the function occurs substantially instantaneously due to the use of radio frequency and eliminates the need for a custom hard-wired control system.
Abstract:
A tire inflation system includes an air supply source in selective fluid communication with a tire via a pneumatic conduit. A first valve is in fluid communication with the pneumatic conduit in between a first portion and a second portion of the conduit. A second valve that includes a vent channel is in fluid communication with the pneumatic conduit between the second portion and a third portion of the conduit. A rotary union is in fluid communication with the third portion of the conduit adjacent the tire. A first pressure indicator is in fluid communication with the first portion of the pneumatic conduit and a second pressure indicator is in fluid communication with the third portion of the pneumatic conduit. An inflation pressure of the tire is measured with a step-up procedure and the tire is inflated with an extended-pulse procedure.
Abstract:
A frame hanger for suspending an axle/suspension system from an aluminum vehicle frame also is formed of aluminum. The hanger is directly attached to the other components of the frame by welds. The hanger is an integral structure that successfully reacts loads encountered by the axle/suspension system during operation of the vehicle, and which are transmitted into the other components of the vehicle frame through the hangers. The hanger reacts such loads and especially side or lateral loads, despite being formed from the lightweight metal aluminum, and together with the other components of the vehicle frame is free of add-on support structures such as gussets or the like. The aluminum hanger achieves such efficient load reacting capabilities due to its structural design which substantially completely and continuously surrounds and laterally supports its respective beam bushing assembly of the axle/suspension system suspended from the hanger.
Abstract:
A vehicle steering knuckle assembly (304) for use in association with a vehicle steering axle assembly (305) is shown to include an upper piece (306) having a first king pin bore (316) extending through it and a backbone piece (308) removably connected to the first piece (306). The backbone (308) has a second king pin bore extending through it. The upper piece (306) has an integral steering arm (310) and a pad (312) through which is machined a steering ball taper. The lower piece (308) has an integral tie rod (330) and a pad (332) through which is machined a tie rod ball taper. Because the two pieces are removable from each other, the steering knuckle can be assembled and serviced while a king pin is retained in place in an axle beam.