A system configured to raise and lower a chassis of a vehicle. The system includes a damper with a first end connected to the chassis and a second end that is opposite to the first end. An actuation assembly includes a rotatable arm and a motor configured to rotate the rotatable arm, the rotatable arm is connected to both the second end of the damper and a control arm of the vehicle. Rotation of the rotatable arm by the motor moves the damper between a raised position to raise the chassis and a lowered position to lower the chassis.

A clamp group for a vehicle leaf spring suspension is disclosed. The clamp group secures a longitudinally disposed, leaf spring at separate and distinct locations, between which the leaf spring is undamped and spaced away from the top and bottom pads of the clamp group. Shear stress is reduced and the spring remains active throughout its length.

An off-road vehicle includes a chassis, an axle carriage, a rigid axle and a pair of suspension cylinders. The axle carriage is attached to or forms a part of the chassis, and includes a generally vertically arranged slot. The rigid axle is mounted to the axle carriage with a wheel hub at each end thereof, and is vertically movable relative to the axle carriage. The suspension cylinders are connected between the axle carriage and axle, and are operable to move the axle in vertical directions relative to the axle carriage. The off-road vehicle is characterized in that the axle includes a first pair of roll angle stops which engage the axle carriage when the axle is at or near a fully lowered position relative to the axle carriage, and a second pair of roll angle stops which engage the axle carriage when the axle is at or near a fully raised position relative to the axle carriage.

An axle suspension system and a method of manufacture. The axle suspension system may have an axle, an axle wrap, and a weld seam. The axle wrap may have first and second wrap portions that mechanically interlock with each other and that have overlapping ends that may receive a weld seam.

A three-wheeled vehicle is disclosed having a vehicle frame supported by front ground engaging members and a single rear ground engaging member. The vehicle includes an engine positioned forward of an operator area and a swing arm coupled to the single rear ground engagement member. The operator area of the vehicle may include seating for a driver and a passenger.

An off-road vehicle includes a chassis, an axle carriage, a rigid axle and a pair of suspension cylinders. The axle carriage is attached to or forms a part of the chassis, and includes a generally vertically arranged slot. The rigid axle is mounted to the axle carriage with a wheel hub at each end thereof, and is vertically movable relative to the axle carriage. The suspension cylinders are connected between the axle carriage and axle, and are operable to move the axle in vertical directions relative to the axle carriage. The off-road vehicle is characterized in that the axle includes a first pair of roll angle stops which engage the axle carriage when the axle is at or near a fully lowered position relative to the axle carriage, and a second pair of roll angle stops which engage the axle carriage when the axle is at or near a fully raised position relative to the axle carriage.

The present application discloses an air suspension system, including a frame for mounting a vehicle body, a bridge housing for mounting wheels, and air springs, shock absorbers, a connecting rod frame and a thrust module connected between the frame and the bridge housing. Since the thrust module is standardized, a suitable thrust module can be matched according to different working conditions, thereby making the complex suspension adjustment work lightweight.

A system configured to raise and lower a chassis of a vehicle. The system includes a damper with a first end connected to the chassis and a second end that is opposite to the first end. An actuation assembly includes a rotatable arm and a motor configured to rotate the rotatable arm, the rotatable arm is connected to both the second end of the damper and a control arm of the vehicle. Rotation of the rotatable arm by the motor moves the damper between a raised position to raise the chassis and a lowered position to lower the chassis.

A control apparatus for heavy-duty vehicle lift axle/suspension systems, the control apparatus comprising a source of fluid pressure, a primary controller, and a secondary controller. The primary controller is located remote from the lift axle/suspension system. The secondary controller is located proximate to the lift axle/suspension system and the source of fluid pressure and is in fluid communication with the primary controller, the source of fluid pressure, and at least one lift bag and at least one air spring of the lift axle/suspension system. The secondary controller includes a pilot-operated poppet assembly and a discrete or integrated relay valve assembly wherein the primary controller transmits at least a pneumatic pilot signal to the secondary controller in order to selectively inflate and deflate the at least one air spring and the at least one lift bag to selectively control and maintain the extension and retraction of the lift axle/suspension system.

A control apparatus for heavy-duty vehicle lift axle/suspension systems, the control apparatus comprising a source of fluid pressure, a primary controller, and a secondary controller. The primary controller is located remote from the lift axle/suspension system. The secondary controller is located proximate to the lift axle/suspension system and the source of fluid pressure and is in fluid communication with the primary controller, the source of fluid pressure, and at least one lift bag and at least one air spring of the lift axle/suspension system. The secondary controller includes a pilot-operated poppet assembly and a discrete or integrated relay valve assembly wherein the primary controller transmits at least a pneumatic pilot signal to the secondary controller in order to selectively inflate and deflate the at least one air spring and the at least one lift bag to selectively control and maintain the extension and retraction of the lift axle/suspension system.