Provided is a tandem lift auxiliary axle suspension assembly for vehicles which can be selectively raised and lowered to adjust the overall vehicle weight to axle ratio. A tandem wheel mount is connected with a pair of torsion rods to a hanger depending from the vehicle frame. An air spring mounted between the beam and the frame dampen axle movement during use. A lift spring is mounted between the hanger and the torsion rods, or other components of the assembly to selectively raise and lower the tandem axles for ground engagement as needed to decrease the weight to axle ratio.

A vehicle suspension having a frame attachment portion attached to a saddle, first and second bolster springs mounted to spring mounts on an outboard side of the saddle and mounted on walls of a spring mount on an outboard side of an equalizing beam, and third and fourth bolster springs mounted to walls of a spring mount on an inboard side of the saddle and mounted to spring mounts on an inboard side of the equalizing beam, wherein upwardly extending flanges on the bottom of the first and second bolster springs are mounted to each other using a common fastener, and wherein upwardly extending flanges on the bottom of the third and fourth bolster springs are mounted to each other with a common fastener.

A vehicle suspension having a frame attachment portion attached to a saddle, first and second bolster springs mounted to spring mounts on an outboard side of the saddle and mounted on walls of a spring mount on an outboard side of an equalizing beam, and third and fourth bolster springs mounted to walls of a spring mount on an inboard side of the saddle and mounted to spring mounts on an inboard side of the equalizing beam, wherein upwardly extending flanges on the bottom of the first and second bolster springs are mounted to each other using a common fastener, and wherein upwardly extending flanges on the bottom of the third and fourth bolster springs are mounted to each other with a common fastener.

A walking beam assembly mounts onto the main frame of an agricultural trailer in place of a single axle assembly. The walking beam assembly has a main axle beam serving as the only connection to the main frame. Two walking beams, with a pair of wheels on each, are supported at opposing ends of the main axle beam. Two hubs are pivotally supported on the main axle beam at respective hub locations spaced inward axially of the main axle beam relative to the ends of the main axle beam. A pair of brace members are coupled between each hub and the respective walking beam at diametrically opposing sides of the walking beam pivot. The hubs and the brace members are pivotal relative to the main axle beam about the same walking beam axis as the walking beams.

A walking beam assembly mounts onto the main frame of an agricultural trailer in place of a single axle assembly. The walking beam assembly has a main axle beam serving as the only connection to the main frame. Two walking beams, with a pair of wheels on each, are supported at opposing ends of the main axle beam. Two hubs are pivotally supported on the main axle beam at respective hub locations spaced inward axially of the main axle beam relative to the ends of the main axle beam. A pair of brace members are coupled between each hub and the respective walking beam at diametrically opposing sides of the walking beam pivot. The hubs and the brace members are pivotal relative to the main axle beam about the same walking beam axis as the walking beams.

An aircraft landing gear assembly (112) including a shock absorber strut (114), a bogie (120), a link assembly (124), and a movement detector (132). The shock absorber strut includes an upper and a lower telescoping parts (118, 116), the upper part being connectable to the airframe of an aircraft and the lower part being connected to the bogie. The link assembly extends between the upper and lower telescoping parts. The movement detector detects movement of the link assembly relative to the bogie. The movement detector includes: a piston (138) arranged such that relative movement between the link assembly and the bogie causes relative movement of the piston within a cylinder (136); fluid which flows as a result of relative movement between the piston and the cylinder; and a flow sensor (184) arranged to sense a change in flow due to movement of the piston within the cylinder.

A gear arm assembly for a vehicle includes gear arm housing having a first end, a second end, and an intermediate portion, the gear arm housing from the intermediate portion to the first end defining a first arm segment, and the gear arm housing from the intermediate portion to the second end defining a second arm segment. The assembly further includes a plurality of gears meshed together in series and housed within the gear arm housing, the plurality of gears including an intermediate gear within the intermediate portion of the gear arm housing. The assembly further includes a first wheel hub connected to a first gear of the plurality of gears at the first end of the gear arm housing, and a second wheel hub connected to a second gear of the plurality of gears at the second end of the gear arm housing. The assembly further includes a primary drive shaft extending into the gear arm housing at the intermediate portion and configured to connect a drive input to the intermediate gear, a spindle housing configured to connect the gear arm assembly to the frame, and a spindle rotatably coupled to and within the spindle housing and configured to allow for rotation of the gear arm housing relative to the spindle housing.

An object of the present invention is to obtain an electromagnetic suspension apparatus capable of quickly reducing an influence of a mechanical frictional force generated in each part of an electromagnetic actuator. The electromagnetic suspension apparatus includes an electromagnetic actuator that generates a driving force related to a damping operation and an expansion and contraction, an information acquisition unit that acquires vehicle state information including a stroke speed of the electromagnetic actuator, an equivalent frictional force calculation unit that calculates an equivalent frictional force of the electromagnetic actuator based on the vehicle state information, and an ECU that calculates a target driving force of the electromagnetic actuator and controls the driving force of the electromagnetic actuator using the calculated target driving force. The ECU corrects the target driving force based on the equivalent frictional force calculated by the equivalent frictional force calculation unit.

A vehicle suspension having a frame attachment portion attached to a saddle, first and second bolster springs mounted to spring mounts on an outboard side of the saddle and mounted on walls of a spring mount on an outboard side of an equalizing beam, and third and fourth bolster springs mounted to walls of a spring mount on an inboard side of the saddle and mounted to spring mounts on an inboard side of the equalizing beam, wherein upwardly extending flanges on the bottom of the first and second bolster sprints are mounted to each other using a common fastener, and wherein upwardly extending flanges on the bottom of the third and fourth bolster springs are mounted to each other with a common fastener.

A vehicle suspension having a frame attachment portion attached to a saddle, first and second bolster springs mounted to spring mounts on an outboard side of the saddle and mounted on walls of a spring mount on an outboard side of an equalizing beam, and third and fourth bolster springs mounted to walls of a spring mount on an inboard side of the saddle and mounted to spring mounts on an inboard side of the equalizing beam, wherein upwardly extending flanges on the bottom of the first and second bolster sprints are mounted to each other using a common fastener, and wherein upwardly extending flanges on the bottom of the third and fourth bolster springs are mounted to each other with a common fastener.