Conveyance cart
AssigneeKayaba Industry Co., Ltd.
InventorsShinichi Sekine, Osamu Miyatani
Life of this patent
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Abstract
A conveyance cart includes: a body frame; a deck provided liftably against the body frame to load a burden; an electric actuator electrically driven to expand or contract to lift or lower the deck; a current detection element that detects an electric current value supplied to the electric actuator; and a PWM control element that drives the electric actuator in a pulse width modulation (PWM) control manner. The PWM control element increases an on-duty ratio input to the electric actuator if the electric current value detected by the current detection element exceeds a setting value when the deck is lifted.
Claims4
A conveyance cart that can convey a loaded burden, comprising:
- a body frame supported by a wheel;
- a deck provided liftably against the body frame to load a burden;
- an electric actuator electrically driven to expand or contract to lift or lower the deck;
- a current detection element that is configured to detect an electric current value supplied to the electric actuator;
- and
- a PWM control element that is configured to drive the electric actuator in a pulse width modulation (PWM) control manner,
- wherein the PWM control element increases an on-duty ratio input to the electric actuator if the electric current value detected by the current detection element exceeds a setting value when the deck is lifted.
Dependencies are inferred from the claim text.