An overhead door system including a frame, a door leaf and a first hydraulic cylinder. The door leaf is pivotally mounted to the frame. The first hydraulic cylinder has a first cylinder end and a second cylinder end. The first cylinder end is operably attached to the frame. The second cylinder end is operably attached to the door leaf. The first hydraulic cylinder is capable of moving the door leaf between a closed configuration and an open configuration. At least one of the frame and the upper door panel has a slot formed therein. When the door leaf is in the closed configuration, the first hydraulic cylinder is substantially recessed in the slot.

The invention relates to a linear motor structure for a sliding door, comprising a rotor assembly, wherein the rotor assembly includes a fixed part and a movable part, the fixed part is provided with a permanent magnet, a slot hole is formed in a bottom part of the permanent magnet, the movable part is provided with a telescopic rod that is slidably inserted into the slot hole from one end of the slot hole, and a motion transmission part capable of transmitting a motion of the rotor assembly, and the movable part and the fixed part are fixed by a fastener. The linear motor structure is novel in design, reasonable in structure and favorable in adaptability due to the capability of flexibly adjustment of the rotor assembly according to a width of a door frame.

An assistance apparatus for opening and closing a scissor door for a vehicle includes: a door hinge having one side installed at a vehicle body to be rotated vertically through a hinge shaft, and having a door mounted at an opposite side thereof; a gas lifter having a first side installed at the vehicle body, and having a second side installed at the door hinge to assist a rotational force of the door hinge or keep a posture thereof through compression and elongation; and an opening and closing assistance unit for providing the rotational force to the door hinge in interlocking with the pressing operation of a vehicle passenger.

Link for a rigid chain, comprising at least one flange, of rectangular overall shape, with a substantially constant thickness perpendicularly to its main plane. The flange comprises a first part and a second part. Each of the parts comprises a heel designed to bear against a corresponding heel of a similar flange of an adjacent link of the rigid chain, and a base designed to form a bearing about a rotary pin with respect to said adjacent link. The heel and the base each extend on either side of the main plane and parallel to said main plane.

Link for a rigid chain, comprising at least one flange, of rectangular overall shape, with a substantially constant thickness perpendicularly to its main plane. The flange comprises a first part and a second part. Each of the parts comprises a heel designed to bear against a corresponding heel of a similar flange of an adjacent link of the rigid chain, and a base designed to form a bearing about a rotary pin with respect to said adjacent link. The heel and the base each extend on either side of the main plane and parallel to said main plane.

A structure for preventing opposite sliding doors from swaying is provided. The structure includes a lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a lower rail roller unit rollably connected to the lower rail, a lower rail swing arm rotatably connected to the lower rail roller unit and a door, a guide roller unit fixedly connected to the lower rail, the guide roller unit including a guide roller rotatably connected to the lower rail, and a guide stopper fixedly connected to the door. The guide stopper includes a guide route formed inside the guide stopper and configured to serve as a rolling movement route for the guide roller, an exit/entrance portion formed at a first end of the guide route, and a stop portion formed at a second end of the guide route.

A guide mechanism for a sliding door includes a rail configured to be mounted on the sliding door, a roller carriage configured to move along the rail, and including a roller bracket and a roller configured to be rotatably mounted on the roller bracket, a hinge arm configured to be pivotally connected to a vehicle body, a first shaft configured to pivotally connect the roller carriage to the hinge arm, and a second shaft configured to pivotally connect the hinge arm to the vehicle body.

An apparatus comprises a base plate configured to be coupled to a door, the door configured to be positioned in an open position and a closed position; a closing mechanism coupled to the base plate and configured to be coupled to a hinge of the door and having an unprimed state and a primed state, the closing mechanism configured to be transitioned between the unprimed state and the primed state by a user; wherein in the unprimed state the closing mechanism is decoupled from operation of the door; and in the primed state the closing mechanism is configured to move the door into the closed position responsive to receipt of a signal, and the closing mechanism is configured to allow movement of the door between the open position and the closed position in absence of the signal.

An opening and closing body drive device for a vehicle includes a belt frame, plural driven pulleys, a belt wounded around the plural driven pulleys and fixed with a connector with respect to an opening and closing body, a drive unit provided with an output shaft including a rotary axis which extends in a different direction from a rotary axis of each of the plural driven pulleys, and a drive pulley connected to the output shaft of the drive unit. The drive pulley includes a rotary axis extending in the different direction from the rotary axis of each of the plural driven pulleys while extending in the same direction as the rotary axis of the output shaft. The drive pulley is wound with the belt which is twisted between the driven pulleys arranged at opposing sides of the drive pulley in a circumferential direction of the belt.

An opening/closing body control device for vehicles that comprises a lock device and a control device. The control device comprises: a reverse control unit that executes reverse control that rotates a rotating member in reverse, after closing control has been completed; and a position detection unit that detects the rotation position of the rotating member, on the basis of the on/off state of a neutral switch. The position detection unit is capable of detecting whether the rotation position of the rotating member is in a closed area, a release area, or a neutral area. The reverse control unit does not execute reverse control if the rotation position of the rotating member is in the neutral area, when the closing control has been completed.