Powered trailer jacking system
OwnerDarryl W. Baird, Geoffrey R. Watsoninventors
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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.
Claims26
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.
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 adapted to be coupled to the drive shaft of the landing gear, the drive mechanism being coupled to the landing gear through a torque arm so that the electric motor can impart torque to the drive shaft, the mechanism being axially displaceable to axially displace the drive shaft to change the ratio of the gear mechanism, and means to control operation of the electric motor.
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 a two speed electric motor adapted to be demountably coupled to the drive shaft of the landing gear via a gearbox, the drive mechanism being coupled to the landing gear through an axially extendable torque arm so that the electric motor can impart torque to the drive shaft, 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.