Counterbalance assembly for rotatable robotic arm and the like

Details Counterbalance assembly for rotatable robotic arm and the like Counterbalance assembly for rotatable robotic arm and the like

1987-02-11

1989-02-14

Kashnikow, Andres

Spring devices

Vehicle

Torsion

267281, 267285, 901 48, F16F 138, F16F 148, B25J 1900

Patent

active

048041700

ABSTRACT:
There is provided a counterbalance assembly for use in combination with a rotatable robotic arm and the like in a robotic manipulator, where the robotic arm is rotated about an axis by a torque-producing device having a relatively stationary base. The assembly further includes a torsional spring comprising a pair of concentric tubes connected to each other by rubber, with one tube connected to the arm and the other tube connected to the base. In general, any torque created by the influence of gravity acting on the robotic arm, as it is rotated, is counterpoised by torsional wind-up in the spring due to proportional resistance of the rubber to torsional shear. This spring/arm combination thereby reduces the load on the torque-producing device.

REFERENCES:
patent: 2477107 (1949-07-01), Lanchner
patent: 3717231 (1973-02-01), Kaufeldt
patent: 4130027 (1978-12-01), Leighton
patent: 4275614 (1981-06-01), Okubo et al.
patent: 4300198 (1981-10-01), Davini
patent: 4403977 (1983-09-01), Bergles
patent: 4589639 (1986-05-01), Peifer et al.
patent: 4690069 (1987-09-01), Willetts
B. F. Goodrich Catalog entitled "B. F. Goodrich Torsilastic Springs" (1986).
Promotional material from B. F. Goodrich entitled "Velvet Ride Suspension Systems from B. F. Goodrich" (1984).
B. F. Goodrich Catalog entitled "B. F. Goodrich Torsilastic Springs" (1986).

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