Rotary actuator

Details Rotary actuator Rotary actuator

1989-03-02

1990-04-10

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310208, 310 36, 360106, 74573R, H02K 524, H02K 300, G11B 555, F16F 1522

Patent

active

049163426

ABSTRACT:
In a rotary actuator including a voice coil motor having a coil fitted to the other end portion of a carriage fixed to a rotary shaft and having a load at one of the end portions thereof, the rotary actuator of the present invention is characterized in that the rotation on the coil side and the rotation on the load side with respect to the rotary shaft are balanced. The weight of the coil is adjusted by forming the coil by at least two kinds of coil wires having different specific gravities, and where a plurality of coils are disposed on the outer side of the rotary shaft, the weight of the coil on the load side is made smaller than that of the coil on the opposite side.

REFERENCES:
patent: 4346416 (1982-08-01), Riggle
patent: 4658313 (1987-04-01), Takahashi
patent: 4864447 (1989-09-01), Takekado et al.
J. S. Heath, "Design of a Swinging Arm Actuator for a Disk File", IBM Journal of Research and Development, Jul., 1976, pp. 389-397.
Yoshifumi Mizoshita and Nakahiko Matsuo, "Mechanical and Servo Design of a 10 Inch Disk Drive", IEEE Transactions on Magnetics, vol. MAG-17, No. 4, Jul., 1981, pp. 1387-1391.

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