End effector including wrist assembly and monopolar tool for robotic surgical systems

1. An end effector for use with a robotic system, the end effector comprising:

a proximal hub including two opposing upright supports;

a distal hub pivotally coupled to the two opposing upright supports of the proximal hub about a first pivot axis, the distal hub including two opposing upright supports;

a support hub pivotally coupled to the two opposing upright supports of the distal hub about a second pivot axis transverse to the first pivot axis, the support hub configured to couple to a monopolar tool;

a first drive member and a second drive member operably coupled to the support hub; and

a third drive member operably coupled to the distal hub, wherein:

simultaneous proximal translation of the first drive member and the second drive member causes the distal hub to pivot about the first pivot axis; and

proximal translation of only one of the first drive member or the second drive member causes the support hub to pivot about the second pivot axis.

2. The end effector according to claim 1 , wherein:

simultaneous proximal translation of the first drive member and the second drive member causes the distal hub to pivot about the first pivot axis in a first direction; and

proximal translation of the third drive member causes the distal hub to pivot about the first pivot axis in a second direction opposite the first direction.

3. The end effector according to claim 1 , wherein:

proximal translation of the first drive member and distal translation of the second drive member cause the support hub to pivot about the second pivot axis in a first direction; and

distal translation of the first drive member and proximal translation of the second drive member cause the support hub to pivot about the second pivot axis in a second direction opposite the first direction.

4. The end effector according to claim 1 , further comprising:

a monopolar tool received within an opening defined by the support hub; and

a power cable electrically coupled to the monopolar tool and configured to electrically couple the monopolar tool to an electrosurgical generator.

5. The end effector according to claim 1 , further comprising:

a monopolar tool coupled to the support hub;

a power cable electrically coupled to the monopolar tool and configured to electrically couple the monopolar tool to an electrosurgical generator; and

a first pulley, a second pulley, a third pulley, and a fourth pulley, each of the first pulley, second pulley, third pulley, and fourth pulley operably coupled to the proximal hub via a proximal pulley pin and rotatable along the first pivot axis, wherein the first drive member wraps around at least a portion of the first pulley, the second drive member wraps around at least a portion of the second pulley, the third drive member wraps around at least a portion of the third pulley, and the power cable wraps around at least a portion of the fourth pulley.

6. The end effector according to claim 5 , further comprising:

a fifth pulley, a sixth pulley, and a seventh pulley, each of the fifth pulley, the sixth pulley, and the seventh pulley operably coupled to the proximal hub via a distal pulley pin, wherein the first drive member wraps around at least a portion of the fifth pulley, the second drive member wraps around at least a portion of the sixth pulley, and the power cable wraps around at least a portion of the seventh pulley.

7. An electromechanical surgical instrument for use with a robotic system, the electromechanical surgical instrument comprising:

a drive assembly comprising:

a first drive screw having a first threaded shaft portion and a first nut threadingly coupled thereto, the first drive screw configured to be rotated by a first motor;

a second drive screw having a second threaded shaft portion and a second nut threadingly coupled thereto, the second drive screw configured to be rotated by a second motor; and

a third drive screw having a third threaded shaft portion and a third nut threadingly coupled thereto, the third drive screw configured to be rotated by a third motor; and

an end effector operably coupled to the drive assembly, the end effector comprising:

a proximal hub including two opposing upright supports;

a distal hub pivotally coupled to the two opposing upright supports of the proximal hub about a first pivot axis, the distal hub including two opposing upright supports;

a support hub pivotally coupled to the two opposing upright supports of the distal hub about a second pivot axis transverse to the first pivot axis, the support hub configured to couple to a monopolar tool;

a first drive member, wherein a proximal portion of the first drive member is coupled to the first drive nut and a distal portion of the first drive member is coupled to the support hub;

a second drive member, wherein a proximal portion of the second drive member is coupled to the second drive nut and a distal portion of the second drive member is coupled to the support hub; and

a third drive member, wherein a proximal portion of the third drive member is coupled to the third drive nut and a distal portion of the third drive member is coupled to the distal hub.

8. The electromechanical surgical instrument according to claim 7 , wherein:

simultaneous proximal translation of the first drive member and the second drive member causes the distal hub to pivot about the first pivot axis; and

proximal translation of only one of the first drive member or the second drive member causes the support hub to pivot about the second pivot axis.

9. The electromechanical surgical instrument according to claim 7 , wherein:

simultaneous proximal translation of the first drive member and the second drive member causes the distal hub to pivot about the first pivot axis in a first direction; and

proximal translation of the third drive member causes the distal hub to pivot about the first pivot axis in a second direction opposite the first direction.

10. The electromechanical surgical instrument according to claim 7 , wherein:

proximal translation of the first drive member and distal translation of the second drive member cause the support hub to pivot about the second pivot axis in a first direction; and

distal translation of the first drive member and proximal translation of the second drive member cause the support hub to pivot about the second pivot axis in a second direction opposite the first direction.

11. The electromechanical surgical instrument according to claim 7 , further comprising:

a monopolar tool received within an opening defined by the support hub; and

a power cable electrically coupled to the monopolar tool and configured to electrically couple the monopolar tool to an electrosurgical generator.

12. The electromechanical surgical instrument according to claim 7 , further comprising:

a monopolar tool coupled to the support hub;

a power cable electrically coupled to the monopolar tool and configured to electrically couple the monopolar tool to an electrosurgical generator; and

a first pulley, a second pulley, a third pulley, and a fourth pulley, each of the first pulley, second pulley, third pulley, and fourth pulley operably coupled to the proximal hub via a proximal pulley pin and rotatable along the first pivot axis, wherein the first drive member wraps around at least a portion of the first pulley, the second drive member wraps around at least a portion of the second pulley, the third drive member wraps around at least a portion of the third pulley, and the power cable wraps around at least a portion of the fourth pulley.

13. The electromechanical surgical instrument according to claim 7 , further comprising:

a fifth pulley, a sixth pulley, and a seventh pulley, each of the fifth pulley, the sixth pulley, and the seventh pulley operably coupled to the proximal hub via a distal pulley pin, wherein the first drive member wraps around at least a portion of the fifth pulley, the second drive member wraps around at least a portion of the sixth pulley, and the power cable wraps around at least a portion of the seventh pulley.

14. A robotic electrosurgical system comprising:

an electrosurgical generator configured to generate electrosurgical energy; and

an electromechanical surgical instrument having a monopolar tool configured to couple to the electrosurgical generator and transmit the generated electrosurgical energy, the electromechanical surgical instrument comprising:

a drive assembly comprising:

a first drive screw having a first threaded shaft portion and a first nut threadingly coupled thereto, the first drive screw configured to be rotated by a first motor;

a second drive screw having a second threaded shaft portion and a second nut threadingly coupled thereto, the second drive screw configured to be rotated by a second motor; and

a third drive screw having a third threaded shaft portion and a third nut threadingly coupled thereto, the third drive screw configured to be rotated by a third motor; and

an end effector operably coupled to the drive assembly, the end effector comprising:

a proximal hub including two opposing upright supports;

a distal hub pivotally coupled to the two opposing upright supports of the proximal hub about a first pivot axis, the distal hub including two opposing upright supports;

a support hub pivotally coupled to the two opposing upright supports of the distal hub about a second pivot axis transverse to the first pivot axis, the support hub configured to couple to the monopolar tool;

a first drive member, wherein a proximal portion of the first drive member is coupled to the first drive nut and a distal portion of the first drive member is coupled to the support hub;

a second drive member, wherein a proximal portion of the second drive member is coupled to the second drive nut and a distal portion of the second drive member is coupled to the support hub; and

a third drive member, wherein a proximal portion of the third drive member is coupled to the third drive nut and a distal portion of the third drive member is coupled to the distal hub.

15. The robotic electrosurgical system according to claim 14 , further comprising:

a first motor operably coupled to the first drive screw;

a second motor operably coupled to the second drive screw;

a third motor operably coupled to the third drive screw; and

a control device configured to control actuation of at least one of the first motor, the second motor, or the third motor.

16. The robotic electrosurgical system according to claim 15 , wherein the control device is configured to coordinate control of the first motor with control of the second motor by actuating the first motor in a first direction when actuating the second motor in a second direction opposite the first direction.

17. The robotic electrosurgical system according to claim 15 , wherein the control device is configured to coordinate control of the first motor and the second motor with control of the third motor by actuating the first motor and the second motor in a first direction when actuating the third motor in a second direction opposite the first direction.

18. The robotic electrosurgical system according to claim 14 , wherein:

simultaneous proximal translation of the first drive member and the second drive member causes the distal hub to pivot about the first pivot axis; and

proximal translation of only one of the first drive member or the second drive member causes the support hub to pivot about the second pivot axis.

19. The robotic electrosurgical system according to claim 14 , wherein:

simultaneous proximal translation of the first drive member and the second drive member causes the distal hub to pivot about the first pivot axis in a first direction; and

proximal translation of the third drive member causes the distal hub to pivot about the first pivot axis in a second direction opposite the first direction.

20. The robotic electrosurgical system according to claim 14 , further comprising:

a power cable electrically coupling the monopolar tool to the electrosurgical generator; and

a first pulley, a second pulley, a third pulley, and a fourth pulley, each of the first pulley, second pulley, third pulley, and fourth pulley operably coupled to the proximal hub via a proximal pulley pin and rotatable along the first pivot axis, wherein the first drive member wraps around at least a portion of the first pulley, the second drive member wraps around at least a portion of the second pulley, the third drive member wraps around at least a portion of the third pulley, and the power cable wraps around at least a portion of the fourth pulley.