Actuator with buckling member stability

Patent metadata

Field	Value
Publication number	US-11560919-B2
Application number	US-202016842962-A
Country	US
Kind code	B2
Filing date	Apr 8, 2020
Priority date	Apr 8, 2020
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

A device includes a frame including a first end and a second end; a mechanism including a first side that faces the first end of the frame, and a second side that faces the second end of the frame; a first buckling member attached to the first side of the mechanism and the first end of the frame; a second buckling member attached to the second side of the mechanism and the second end of the frame; and at least one actuator that engages the mechanism, the first buckling member, and the second buckling member in a selective sequence causing the mechanism to articulate between the first end and the second end of the frame. Engagement of the first buckling member and the second buckling member by the at least one actuator causes the first buckling member and the second buckling member to buckle and unbuckle in the selective sequence.

First claim

What is claimed is:

1. A device comprising:
a frame comprising a first end and a second end;
a mechanism comprising a first side that faces the first end of the frame, and a second side that faces the second end of the frame;
a first buckling member attached to the first side of the mechanism and the first end of the frame;
a second buckling member attached to the second side of the mechanism and the second end of the frame; and
at least one actuator that comprises a first actuator that applies a first force to the mechanism causing the mechanism to move from a first position to a second position and a second actuator that applies a second force to the second buckling member causing the second buckling member to buckle and the first buckling member to unbuckle and that engages the mechanism, the first buckling member, and the second buckling member in a selective sequence causing the mechanism to articulate between the first end and the second end of the frame,
wherein engagement of the first buckling member and the second buckling member by the at least one actuator causes the first buckling member and the second buckling member to buckle and unbuckle in the selective sequence.

2. The device of claim 1 , wherein the first actuator and the second actuator simultaneously apply the first force and the second force, respectively.

3. The device of claim 1 , wherein the at least one actuator comprises:
a third actuator that applies a third force to the mechanism causing the mechanism to move from the second position to the first position; and
a fourth actuator that applies a fourth force to the first buckling member causing the first buckling member to buckle and the second buckling member to unbuckle.

4. The device of claim 3 , wherein the third actuator and the fourth actuator simultaneously apply the third force and the fourth force, respectively.

5. The device of claim 4 , wherein the first force and the third force comprise axial forces applied to the mechanism.

6. The device of claim 4 , wherein the second force and the fourth force comprise transverse forces applied to the second buckling member and the first buckling member, respectively.

7. The device of claim 1 , wherein the first buckling member and the second buckling member each comprises a length longer than a width or thickness thereof.

8. The device of claim 1 , wherein the first buckling member and the second buckling member each comprises a predetermined failure strain to allow the first buckling member and the second buckling member to buckle without fracturing.

9. A switch comprising:
at least one mechanism configured to move;
a first buckling member attached to the at least one mechanism;
a second buckling member attached to the at least one mechanism; and
a first actuator system that comprises a first actuator that applies a first force to the mechanism causing the mechanism to move from a first position to a second position and a second actuator that applies a second force to the second buckling member causing the second buckling member to buckle and the first buckling member to unbuckle and that selectively (i) engages the first buckling member and disengages the second buckling member, and (ii) disengages the first buckling member and engages the second buckling,
wherein selective engagement and disengagement of the first buckling member and the second buckling member results in movement of the at least one mechanism.

10. The switch of claim 9 , comprising a second actuator system that selectively engages the at least one mechanism causing the at least one mechanism to move from a first position to a second position and back to the first position.

11. The switch of claim 9 , wherein the first actuator system and the second actuator system are individually controlled.

12. The switch of claim 9 , wherein the first actuator system and the second actuator system are linked to each other.

13. The switch of claim 9 , comprising a frame housing the at least one mechanism, wherein the frame attaches to the first buckling member and the second buckling member.

14. A method of actuation comprising:
positioning an articulating mechanism along a path in a frame comprising a first buckling member and a second buckling member and at least one actuator that comprises a first actuator that applies a first force to the mechanism causing the mechanism to move from a first position to a second position and a second actuator that applies a second force to the second buckling member causing the second buckling member to buckle and the first buckling member to unbuckle; and
selectively articulating the first buckling member and the second buckling member causing the articulating mechanism to move from a first position to a second position or vice versa along the path by selectively applying and removing a first transverse force to/from a first buckling member and selectively applying and removing a second transverse force to/from a second buckling member.

15. The method of claim 14 , comprising:
selectively applying a first axial force to the articulating mechanism causing the articulating mechanism to move from the first position to the second position along the path; and
selectively applying a second axial force to the articulating mechanism causing the articulating mechanism to move from the second position to the first position along the path.

16. The method of claim 14 , comprising selectively moving the articulating mechanism laterally along the path.

17. The method of claim 14 , comprising selectively moving the articulating mechanism rotationally along the path.

18. The method of claim 14 , comprising applying the first transverse force to the first buckling member and the second transverse force to the second buckling member, wherein the first buckling member and the second buckling member are not in a state of compression simultaneously.

19. The method of claim 14 , comprising applying the first transverse force to the first buckling member and the second transverse force to the second buckling member, wherein the first buckling member and the second buckling member are in a state of compression simultaneously.

Assignees

• U S Army Combat Capabilities Development Command Army Res Laboratory
• Us Army

Inventors

• Haynes Robert A
• Henry Todd C
• Coatney Michael D

Classifications

• B81B3/0018

  Structures acting upon the moving or flexible element for transforming energy into mechanical movement or vice versa, i.e. actuators, sensors, generators · CPC title

• B81B2201/01

  Switches · CPC title

• F16C1/106

  Plurality of transmitting means, e.g. two or more parallel "Bowden cables" · CPC title

• H01H2001/0084

  with perpendicular movement of the movable contact relative to the substrate · CPC title

• H01H1/0036

  Switches making use of microelectromechanical systems [MEMS] (for electromagnetic relays H01H50/005; for electrostatic relays H01H59/0009) · CPC title