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US 11,248,409 B2Granted
Door driving device
AssigneeNabtesco Corporation
InventorsIkuo Makihira, Shinsuke Uchida
Life of this patent
Estimating the term…
Abstract
A door driving device includes a driving unit driving a door that opens and closes an entrance of a vehicle having a door case, and a control unit controlling the driving unit such that the door moves with a discontinuous acceleration during a period from when the door starts to open to when the door moves at a constant speed in an opening direction in which the door is retracted into the door case.
Claims6
A door driving device, comprising:
- a driving unit driving a door that opens and closes an entrance of a vehicle having a door case;
- and
- a control unit controlling the driving unit such that, during a period from when the door starts to open to when the door is retracted into the door case, the door moves in an opening direction in which the door is retracted into the door case with a discontinuous acceleration as a preliminary action instead of moving at a constant speed, and thereafter controlling the driving unit such that the door moves at a constant speed in the opening direction,
- wherein the control unit controls the driving unit such that the door is moved in the opening direction as a first action, and thereafter the control unit controls the driving unit such that the movement of the door is decelerated, stopped, or decelerated and stopped as a second action to thereby move the door with the discontinuous acceleration in the preliminary action.
1 more element
A door driving device, comprising:
- a driving unit driving a door that opens and closes an entrance of a vehicle having a door case;
- and
- a control unit controlling the driving unit such that the door moves with a discontinuous acceleration during a period from when the door starts to open to when the door moves at a constant speed in an opening direction in which the door is retracted into the door case,
- wherein the control unit controls the driving unit such that the door is moved in the opening direction as a first action, and thereafter the control unit controls the driving unit such that the movement of the door is decelerated, stopped, or decelerated and stopped as a second action thereby the door moves with the discontinuous acceleration, and
- wherein the control unit controls the driving unit such that an acceleration of the door in the opening direction in the first action is larger than an acceleration of the door in the opening direction after the second action is performed.
2 more elements
A door driving device, comprising:
- a driving unit driving a door that opens and closes an entrance of a vehicle having a door case;
- and
- a control unit controlling the driving unit such that the door moves with a discontinuous acceleration during a period from when the door starts to open to when the door moves at a constant speed in an opening direction in which the door is retracted into the door case,
- wherein the control unit controls the driving unit such that the door is moved in the opening direction as a first action, and thereafter the control unit controls the driving unit such that the movement of the door is decelerated, stopped, or decelerated and stopped as a second action thereby the door moves with the discontinuous acceleration,
- wherein the driving unit includes:
- a cylinder including a piston that drives the door to be opened or closed, a first pressure chamber that drives the piston such that the door is moved in the opening direction, and a second pressure chamber that drives the piston such that the door is moved in a closing direction opposite to the opening direction;
- a first switching valve through which air is supplied to the first pressure chamber;
- and
- a second switching valve through which air is supplied to the second pressure chamber,
- wherein the control unit controls the driving unit such that the second switching valve discharges the air from the second pressure chamber while the first switching valve supplies the air to the first pressure chamber in order to move the door in the opening direction as the first action, and thereafter the control unit controls the driving unit such that the second switching valve supplies the air to the second pressure chamber in order to decelerate, stop, or decelerate and stop the movement of the door as the second action.
7 more elements
Dependencies are inferred from the claim text.