Powered trailer jacking system
OwnerDarryl W. Baird, Geoffrey R. Watsoninventors
Life of this patent
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Abstract
A demountable drive mechanism for the landing gear of a semi-trailer, the landing gear including legs that are extendable and retractable by rotation of a drive shaft through a gear mechanism, the drive shaft being axially displaceable to change the ratio of the gear mechanism, the drive mechanism comprising an electric motor having an output shaft adapted to be coupled to the drive shaft of the landing gear assembly, the electric motor being coupled to the landing gear through a torque arm so that the electric motor can impart torque to the drive shaft, means to axially displace the drive shaft to change the gear ratio, and means to control operation of the electric motor and axial displacement of the drive shaft.
Claims24
A demountable drive mechanism for landing gear of a semi-trailer, the landing gear including legs that are extendable and retractable by rotation of a drive shaft through a gear mechanism having a changeable ratio, the drive shaft being axially displaceable to change the ratio of the gear mechanism, the drive mechanism being directly secured to the drive shaft and comprising an electric motor having an output shaft adapted to be coupled to the drive shaft, the drive mechanism further including an adjustable torque arm for engaging the landing gear so that the electric motor can impart torque to the drive shaft, drive means acting between the electric motor and the landing gear for axially displacing the drive shaft to change the gear ratio, and control means for controlling operation of the electric motor and drive means.
A demountable drive mechanism for landing gear of a semi-trailer, the landing gear including legs that are extendable and retractable by rotation of a drive shaft through a gear mechanism having a changeable ratio, the drive shaft being axially displaceable to change the ratio of the gear mechanism, the drive mechanism being adapted to be directly secured to and supported by the drive shaft, the drive mechanism comprising an electric motor adapted to be coupled to the drive shaft, the drive mechanism including an axially adjustable torque arm for engaging the landing gear so that the electric motor can impart torque to the drive shaft, the drive mechanism being axially displaceable to axially displace the drive shaft to change the ratio of the gear mechanism, and the drive mechanism further including control means to control operation of the electric motor.
A demountable drive mechanism for landing gear of a semi-trailer, the landing gear including legs that are extendable and retractable by rotation of a drive shaft through a gear mechanism having a changeable ratio, the drive shaft being axially displaceable to change the ratio of the gear mechanism, the drive mechanism comprising a two speed electric motor adapted to be demountably coupled to and supported by the drive shaft of the landing gear via a gearbox, the drive mechanism including an axially extendable torque arm for engaging the landing gear so that the electric motor can impart torque to the drive shaft, and control means to control operation of the electric motor, the drive mechanism being axially displaceable to axially displace the drive shaft to change the ratio of the gear mechanism.
Dependencies are inferred from the claim text.