Platform link wrist mechanism
First Claim
1. A robotic surgical tool comprising:
- a distal member configured to support an end effector;
a plurality of rods mechanically coupled to the distal member and movable generally along an axial direction to adjust an orientation of the distal member with respect to the axial direction; and
a tool base including a first rotational actuation mechanism mechanically coupled to at least one of the plurality of rods so as to control movement of the at least one rod generally along the axial direction, and a roll actuation mechanism mechanically coupled to the distal member to control rotation of the distal member about the axial direction, wherein first and second rods of the plurality of rods are coupled to the first rotational actuation mechanism so that rotation of the first rotational actuation mechanism in a first direction causes advancement of the first rod and retraction of the second rod, the first rotational actuation mechanism includes a first sector gear and a first pitch/yaw gear, the first sector gear having an axis of rotation and two pivot pins positioned on opposite sides of the axis of rotation, the first and second rods are respectively connected to the two pivot pins so as to advance and retract the first and second rods when the first sector gear is rotated about the axis of rotation, the first pitch/yaw gear engaged with the first sector gear so as to controllably rotate the first sector gear.
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Accused Products
Abstract
The present invention provides a robotic surgical tool for use in a robotic surgical system to perform a surgical operation. The robotic surgical tool includes a wrist mechanism disposed near the distal end of a shaft which connects with an end effector. The wrist mechanism includes a distal member configured to support the end effector, and a plurality of rods extending generally along an axial direction within the shaft and movable generally along this axial direction to adjust the orientation of the distal member with respect to the shaft. Advancement or retraction of a first rod generally along the axial direction tips the base through a first angle. The addition of a second angle allows the distal member to direct the end effector in essentially a compound angle. The robotic surgical tool may also include provisions for roll movement.
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Citations
14 Claims
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1. A robotic surgical tool comprising:
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a distal member configured to support an end effector; a plurality of rods mechanically coupled to the distal member and movable generally along an axial direction to adjust an orientation of the distal member with respect to the axial direction; and a tool base including a first rotational actuation mechanism mechanically coupled to at least one of the plurality of rods so as to control movement of the at least one rod generally along the axial direction, and a roll actuation mechanism mechanically coupled to the distal member to control rotation of the distal member about the axial direction, wherein first and second rods of the plurality of rods are coupled to the first rotational actuation mechanism so that rotation of the first rotational actuation mechanism in a first direction causes advancement of the first rod and retraction of the second rod, the first rotational actuation mechanism includes a first sector gear and a first pitch/yaw gear, the first sector gear having an axis of rotation and two pivot pins positioned on opposite sides of the axis of rotation, the first and second rods are respectively connected to the two pivot pins so as to advance and retract the first and second rods when the first sector gear is rotated about the axis of rotation, the first pitch/yaw gear engaged with the first sector gear so as to controllably rotate the first sector gear. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification