System for automatically opening and closing doors of vehicles
First Claim
1. A system for automatically opening and closing a door of a vehicle, comprising:
- a hydraulic pump for pressurizing oil supplied from an oil reservior connected thereto;
a pressure accumulator connected to said hydraulic pump for removing a pressure pulsation generated in the pressurized oil outputted thereto from said hydraulic pump, said pressure accumulator thereby being disposed on an output side of the hydraulic pump;
a pressure control valve, connected to said hydraulic pump and pressure accumulator for controlling a flow direction of the pressurized oil which is applied thereto from the hydraulic pump in communication with said pressure accumulator;
a controller electrically connected to said pressure control valve for controlling same in response to input signals;
an intermittent gearing assembly means for transmitting a rotational motion, induced by the pressurized oil supplied from said control valve, to open and close said door, said intermittent gearing assembly means comprising a cylindrical drive intermittent gear rotatable about a drive shaft fixed to a vehicle frame and a cylindrical driven intermittent gear engaging said drive intermittent gear for co-rotation therewith, said driven gear being mounted on a driven shaft fixed to the door which driven shaft is rotatable with the driven gear;
a hydraulic rotator formed by the drive gear and drive shaft for converting the hydraulic power of the pressurized oil into the rotational motion of said intermittent gearing assembly means through rotation of said drive gear, said hydraulic rotator comprising a pair of variable oil chambers which are formed in said drive intermittent gear and communicate with said pressure control valve to receive pressurized oil therefrom; and
a longitudinal lock bar for locking the door to the vehicle frame, said longitudinal lock bar being connected at an end thereof to a connection ring provided at an outer surface of the driven intermittent gear.
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Accused Products
Abstract
A system for automatically opening and closing a door of a vehicle is disclosed. The system comprises an oil-hydraulic pump for generating hydraulic power for the system and a pressure accumulator for removing pressure pulsations generated in the pressurized oil outputted from the oil-hydraulic pump. A pressure control valve controls a flow direction of the pressurized oil applied from the oil-hydraulic pump thereto, and a controller controls the pressure control valve in response to input signals. An intermittent gearing assembly transmits rotational motion caused by the pressurized oil acting thereon to the door to automatically open or close the door. A hydraulic rotator converts the hydraulic power of the pressurized oil into rotational motion of the intermittent gearing assembly. A longitudinal lock bar movable in response to intermittent gearing motion locks and unlocks the door relative to the vehicle frame.
52 Citations
7 Claims
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1. A system for automatically opening and closing a door of a vehicle, comprising:
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a hydraulic pump for pressurizing oil supplied from an oil reservior connected thereto; a pressure accumulator connected to said hydraulic pump for removing a pressure pulsation generated in the pressurized oil outputted thereto from said hydraulic pump, said pressure accumulator thereby being disposed on an output side of the hydraulic pump; a pressure control valve, connected to said hydraulic pump and pressure accumulator for controlling a flow direction of the pressurized oil which is applied thereto from the hydraulic pump in communication with said pressure accumulator; a controller electrically connected to said pressure control valve for controlling same in response to input signals; an intermittent gearing assembly means for transmitting a rotational motion, induced by the pressurized oil supplied from said control valve, to open and close said door, said intermittent gearing assembly means comprising a cylindrical drive intermittent gear rotatable about a drive shaft fixed to a vehicle frame and a cylindrical driven intermittent gear engaging said drive intermittent gear for co-rotation therewith, said driven gear being mounted on a driven shaft fixed to the door which driven shaft is rotatable with the driven gear; a hydraulic rotator formed by the drive gear and drive shaft for converting the hydraulic power of the pressurized oil into the rotational motion of said intermittent gearing assembly means through rotation of said drive gear, said hydraulic rotator comprising a pair of variable oil chambers which are formed in said drive intermittent gear and communicate with said pressure control valve to receive pressurized oil therefrom; and a longitudinal lock bar for locking the door to the vehicle frame, said longitudinal lock bar being connected at an end thereof to a connection ring provided at an outer surface of the driven intermittent gear. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification