Door operator assembly with motorized rollers

An elevator system comprising:

• an elevator cab having doors that are movable between open and closed positions;
• a rail mounted to said cab;
• at least one roller mounted for movement along said rail and operably connected to the doors, said roller defining an axis of rotation;
• a motor assembly mounted for movement with said roller along said rail and having an output for providing a rotational driving force to said roller to rotate said roller about said axis of rotation and along said rail to move the doors between open and closed positions;
• a planetary drive assembly having a plurality of planetary members mounted within said roller wherein said output from said motor is in driving engagement with said members to drive said roller along said rail;
• and
• a controller that controls said motor assembly to control opening and closing speeds for said doors.

An elevator system comprising:

• an elevator cab having doors that are movable between open and closed positions;
• a rail mounted to said cab;
• at least one roller mounted for movement along said rail and operably connected to the doors, said roller defining an axis of rotation;
• a motor assembly mounted for movement with said roller along said rail and having an output for providing a rotational driving force to said roller to rotate said roller about said axis of rotation and along said rail to move the doors between open and closed positions;
• a worm gear assembly having a worm coupled to said output from said motor and in driving engagement with a worm gear formed about the circumference of said roller;
• and
• a controller that controls said motor assembly to control opening and closing speeds for said doors.

A door operator assembly for opening elevator doors comprising:

• a rail mounted to an elevator cab;
• at least one roller mounted for movement along said rail and operably connected to the doors, said roller defining an axis of rotation;
• a motor having an output for providing a rotational driving force to rotate said roller about said axis of rotation and along said rail;
• and
• a gear arrangement interconnecting said motor and said roller for transmitting the rotational driving force from said motor to said roller to move the doors between open and closed positions wherein said gear arrangement is comprised of a planetary drive assembly having a plurality of planetary members mounted within said roller wherein said output from said motor is in driving engagement with said members to drive said roller along said rail.

A door operator assembly for opening elevator doors comprising:

• a rail mounted to an elevator cab;
• at least one roller mounted for movement along said rail and operably connected to the doors, said roller defining an axis of rotation;
• and
• at least one tree-axis torque motor having a stator supporting a winding and a rotor with an internal surface for supporting a plurality of magnets and an external surface formed as said roller for riding along said rail wherein said motor generates a rotating magnetic field that is non-perpendicular to said axis of rotation for driving said roller along said rail to move the doors between open and closed positions.