Joints and connections – Particular configuration or material of member
Patent
1995-11-20
1997-10-07
Knight, Anthony
Joints and connections
Particular configuration or material of member
403327, 403322, 403106, 403 83, 403 81, 403 28, 16297, 16385, 16 485, H01L 3105, F16B 100, F16C 1110, F16C 1100
Patent
active
056740271
ABSTRACT:
The implementation of smart materials (shape-memory alloys (SMA) or piezoceramics) as integral actuating devices for single degree-of-freedom (DOF) hinges, thereby providing mobility as well as actuation to a wide range of mechanisms used in industrial, automotive and aircraft systems. A single DOF hinge is used in which smart materials are used both for actuation and for performance enhancement. The hinge consists of a tang and clevis, two conical inserts, one push block, one bolt and nut, and two washers. Assembly takes place by first putting the push block inside the clevis and putting the tang in place, then inserting the cones, inserting a bolt in the cones and finally tightening the bolt in this arrangement together with the nut to a specified torque. The amount of torque applied is related to the amount of preload in the undisturbed configuration of the hinge and the expansion of the conical inserts required to initiate rotation of the hinge. The smart material of the conical inserts is used to provide rotational mobility to the hinge. Applying a current causes the conical inserts, which are fabricated out of a smart material, to expand, thereby creating a gap between the conical inserts and the clevis. The existence of the free-play caused by the gap allows the clevis to rotate about the hinge's rotational axis. Once the hinge rotation is complete, the free-play in the hinge is eliminated by restoring the smart material of the conical inserts to the original (undisturbed) configuration, thereby pre-loading the hinge components.
REFERENCES:
patent: 3450372 (1969-06-01), de Lange
patent: 4512699 (1985-04-01), Jackson
patent: 4617448 (1986-10-01), Goldowsky
patent: 4654092 (1987-03-01), Melton
patent: 4700541 (1987-10-01), Gabriel et al.
patent: 4753465 (1988-06-01), Dalby
patent: 4797085 (1989-01-01), Chiang et al.
patent: 4869585 (1989-09-01), Romanet
patent: 5058239 (1991-10-01), Lee
patent: 5095595 (1992-03-01), Stella et al.
patent: 5114104 (1992-05-01), Cincotta et al.
patent: 5150770 (1992-09-01), Secci
patent: 5272486 (1993-12-01), Dickinson
patent: 5395193 (1995-03-01), Krumme et al.
patent: 5408932 (1995-04-01), Hesse et al.
Kubel, "Shape Memory Metals," Materials Engineering, pp. 27-30. Jun. 1984 .
Stella et al., "SMA Applications In An Innovative Multishot Deployment Mechanism," 25th Aerospace Mechanism Symposium, pp. 275-290. May 1991 .
Brook, "Boom Latch And release Mechanism For Space Satellites Actuated By A Shape Memory Alloy Trigger," Phase Transformations, pp. VI-1 to VI-3. Apr. 1979 .
Seidel, A., Schwabbauer, P., Hilmer, K.H., 1994 "Novel Orbital Disconnect Support for Cryogenic Tanks," Cryogenics, pp. 389-392.
Zhen WU, X.B., Vijay, K.V., and Vasundara, V.V., "A Study on Control of a Light Weight Robotic System Using Piezoelectric Motor, Sensor and Actuator," Proceedings of the ADPA/AIAA/ASME/SPIE Conference on Active Materials and Adaptive Structures, Alexandria Virginia, pp. 161-166, 1991.
Wayman, C.M., "Shape Memory and Related Effects," Proceedings of The ADPA/AIAA/ASME/SPIE Conference on Active Materials and Adaptive Structures, Alexandria, Virginia, pp. 161-166, 1991.
Stoeckel, D., and Simpson, J., "Actuation and Control with Ni-Ti Shape Memory Alloys,", Alexandria, Virginia, pp. 135-143, 1994.
Lynch, T., "Smart Suspension Controls Table Motion," Design News, pp. 63-66, 1992.
McCarty, L.H., "Shape-Memory Alloy Drives Rotary Actuator," Design News, pp. 180-181, 1990.
McCarty, L.H., "Shape-Memory Alloy Actuates Separation Device," Design News, pp. 78-79, 1991.
Kloepel, J.E., "Shaping the Future with Smart Materials," Materials Performance, pp. 92-93, 1993.
Savage, S.J., "Engineering Aspects of Shape-Memory Alloys," Materials and Science Technology, p. 973, 1991.
Lu, L, Lai, M. O., and Zhang, S., "Preparation of Copper Based Shape Memory Alloy Via Mechanical Alloying Technique," Material Science and Technology, pp. 319-322, 1994.
Chamberlain, G., "Memory Metal Makes Its Mark" Design News, pp. 26-27, 1986.
McCarty, L.H., "Shape-Memory Metal Actuates Disc Drive Head" Design News, pp. 188-189, 1986.
Monkman, G.J., "Robotic Compliance Control Using Memory Foams," The Industrial Robot, No. 4, pp. 31-32, 1991.
Isalgue, A., Torra, V., "High-Resolution Equipment for Martensitic Transformation in Shape Memory Alloys: Local Studies in Stress-Strain-Temperature," Measurement Science and Technology, pp. 456-461, 1993.
Schetky, L. McD., "Shape Memory Effect Alloys for Robotic Devices," Robotics Age, V6, pp. 13-17, 1984.
Boggs, R.N., "How Memory Metals Shape Product Designs," Design News, pp. 72-74, 1993.
Adnyana, D.N., "A Copper-Based Alloy for Shape Memory Wires and Springs," Wire Journal International, pp. 52-61, 1984.
Jean, R.D., Hu, C.T., 1994 "Shape Memory Effect by Constant Stress Ageing in Ti--Ni Alloy," Journal of Materials Science, pp. 449-455.
Tanaka, K., Hayashi, T. and Nishimura, F., "Hysteretic Behavior in an Fe--Cr--Ni--Mn--Si Polycrystalline Shape Memory Alloy During Thermomechanical Cyclic Loading," Journal of Materials Engineering and Performance, pp. 135-143, 1994.
Stoeckel, D., "Shape-Memory Alloys Prompt New Actuator Designs," Advanced Materials and Processes, V138, pp. 33-38, 1990.
McNichols, J.L., Jr. and Cory, J.S., "Thermodynamics of Nitinol" Journal of Applied Physics, pp. 972-984, 1987.
Kuribayashi, K., "Improvement of the Response of an SMA Actuator Using a Temperature Sensor," International Journal of Robotics Research, pp. 13-20, 1991.
Inaba, S., Hane, K., "Miniature Actuator Driven Photothermally Using a Shape-Memory Alloy," Review of Scientific Instruments, pp. 1633-1635, 1993 .
Applied Research Associates, Inc.
Knight Anthony
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