Abstract: A drive mechanism includes a stacked motor assembly. The stacked motor assembly includes a first motor, a first rotatable driver member rotationally fixed to the first motor, a second motor vertically spaced from the first motor, and a second rotatable driver member rotationally fixed to the second motor. The drive mechanism also includes an output shaft spaced from the first motor and the second motor and a flexible drive member rotatably coupling the first rotatable driver member, the second rotatable driver member, and the output shaft together such that rotation of the first rotatable drive member by the first motor and rotation of the second rotatable driver member by the second motor impart rotational torque to the output shaft. The drive mechanism further includes an output belt fixed to the output shaft and configured to be wound about the output shaft upon rotation of the output shaft.

Abstract: A mobile robot includes a lift assembly, a low-profile drive mechanism, and a plurality of wheels such that the mobile robot is moveable. The lift assembly includes a base and a platform moveable between a lowered state where the platform is proximal to the base and an elevated state where the platform is distal to the base. The low-profile drive mechanism includes a plurality of electric motors arranged in series along an axis to define an initial electric motor, one or more intermediate electric motors, and a final electric motor. The low-profile drive mechanism also includes a gear mounted to each of the electric motors and an output member driven by the gear mounted to the final electric motor to receive the combined rotational torque from the gears. The output member is coupled to the platform to move the platform between the lowered state and the elevated state.

Abstract: A drive mechanism includes a mount block extending along an axis and a plurality of electric motors supported by the mount block. The electric motors are arranged in series along the axis to define an initial electric motor, one or more intermediate electric motors, and a final electric motor. The drive mechanism also includes a gear mounted to each of the electric motors, and an output member driven by the gear mounted to the final electric motor to receive the combined rotational torque from the gears of the series of electric motors.

Abstract: A lift assembly includes a base, a platform coupled to the base and moveable between a lowered state and an elevated state, a first pair of scissor arms including a first arm and a second arm pivotably connected to one another, and a second pair of scissor arms including a third arm and a fourth arm pivotably connected to one another. The lift assembly also includes a carriage coupled to the first pair of scissor arms and to the second pair of scissor arms. The carriage includes a shaft extending transverse to the first arm, the second arm, the third arm, and the fourth arm, and a centering wheel rotatably coupled to the shaft. The first arm includes a cam surface engageable with the centering wheel to guide travel of the platform between the lowered state and the elevated state.

Abstract: A lift assembly including a platform movable to a raised position, a lowered position, and an intermediate position between the raised and lowered positions. A scissor arm system defines a cavity beneath the platform. The scissor arm system includes a pair of scissor arms pivotably connected to each other. The scissor arm system has opposed first and second ends with the first ends of the scissor arm system being coupled to the platform. A stanchion guides the platform between the raised and lowered positions. The stanchion extends from a first stanchion end to a second stanchion end above the first stanchion end. A drive mechanism is mounted to the platform to move with the platform. A flexible member is coupled to the stanchion and the drive mechanism. The drive mechanism winds and unwinds the flexible member to move the platform between the raised and lowered positions.

Abstract: A lift assembly including a platform movable to a raised position, a lowered position, and an intermediate position between the raised and lowered positions. A scissor arm system defines a cavity beneath the platform. The scissor arm system includes a pair of scissor arms pivotably connected to each other. The scissor arm system has opposed first and second ends with the first ends of the scissor arm system being coupled to the platform. A stanchion guides the platform between the raised and lowered positions. The stanchion extends from a first stanchion end to a second stanchion end above the first stanchion end. A drive mechanism is mounted to the platform to move with the platform. A flexible member is coupled to the stanchion and the drive mechanism. The drive mechanism winds and unwinds the flexible member to move the platform between the raised and lowered positions.