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Browse Prior Art Database

Program Design of Counterbalance Mechanisms

IP.com Disclosure Number: IPCOM000079426D
Original Publication Date: 1973-Jul-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Sokol, GD: AUTHOR

Abstract

This program facilitates the problem of designing the required shape of a cam-contour for torsion bar counterbalancing mechanisms, used in such operations as raising covers. The program uses mathematical expressions based on an energy principle, which equates the strain energy released by the torsion bar to the work required to lift the cover to any given angle, and the resulting printout is used as a cutting schedule for manufacturing purposes.

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Program Design of Counterbalance Mechanisms

This program facilitates the problem of designing the required shape of a cam-contour for torsion bar counterbalancing mechanisms, used in such operations as raising covers. The program uses mathematical expressions based on an energy principle, which equates the strain energy released by the torsion bar to the work required to lift the cover to any given angle, and the resulting printout is used as a cutting schedule for manufacturing purposes.

After this program is compiled, the operator enters variable input data. This input data includes: length of the torsion bar arm; location of torsion bar pivot point; location of origin of cutting schedule coordinate system; initial angle between a horizontal line and the torsion bar arm; total angle of twist initially in the torsion bar; spring constant of the torsion bar; weight of cover; location of the center of gravity of the cover; maximum amount of under and over compensation that is to occur; maximum angular travel of cover; vector direction of torque in the torsion bar; and the desired range for the distance between cutting schedule points. Once this data is entered, the program will operate as indicated in the flow chart.

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