Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1995-06-02
1996-09-10
Marmor, Charles A.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
7449004, 74665L, 4147442, 474 65, 474 66, 474 84, 901 15, 901 21, 901 23, B25J 904
Patent
active
055535097
ABSTRACT:
A three degree-of-freedom robotic manipulator is constructed from three rotary drives. The rotary drive consists of a relatively small diameter cylindrical driving member coupled to a larger diameter cylindrical driven member. The driven member of a second rotary drive is mounted perpendicularly to the driven member of a first drive. The driven member of a third drive is mounted to the periphery of the driven member of the second drive with its axis of rotation parallel to the driven member of the second drive. The driving member of the third drive is located with its axis of rotation coincident with the axis of rotation of the driven member of the second drive. Motors powering the second and third driving members are mounted to the driven member of the first drive roughly centered over its axis of rotation. An extension arm for mounting the end effector is fixed to the driven member of the third drive. This arrangement reduces the number of required components and minimizes motor movement to reduce inertia. Performance is higher and the cost is reduced over conventional designs.
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Conceptual Drawing For Roto-Lok.RTM. Driven Scara Robot, 7 Jun. 91.
Jensen Nathan O.
Marmor Charles A.
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