Browse Prior Art Database

Motion Generator

IP.com Disclosure Number: IPCOM000049189D
Original Publication Date: 1982-May-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 3 page(s) / 99K

Publishing Venue

IBM

Related People

Beattie, HS: AUTHOR

Abstract

Motion-generating devices must contend with acceleration forces and attempt to minimize such acceleration forces to control wear as well as minimize the mass and strength of parts in the devices.

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Motion Generator

Motion-generating devices must contend with acceleration forces and attempt to minimize such acceleration forces to control wear as well as minimize the mass and strength of parts in the devices.

Disclosed in Fig. 1 is a device which will, upon the pulsing of magnets to activate clutches, provide a relatively constant acceleration force up to an operational or maximum velocity and a constant deceleration force from that velocity. By a synchronized control of electrical pulses to magnets actuating clutches, a constant running velocity may be attained.

Input to the device may be provided by belt 10 engaging pulley 12. Pulley 12 will pass the motion thereof through shaft 14 to bevel gears 16 and 18. Bevel gear 18 will, in turn, drive gear 20 and gear 22. Gear 22 is rigidly coupled through a sleeve or hollow shaft to bracket 24. Bracket 24, in turn, supports walking beam 26 connected through link 28 to arms 30 and 32. Arms 30 and 32 are, in turn, connected back to gear 34 and gear 36, respectively. The connection between arm 32 and gear 36 is shaft 38. The device described so far is a speed reduction mechanism coupled to a device for creating harmonic motion. The movement of walking beam 26 is controlled by eccentric cam 40 operating within cage 42. Cage 42 is attached to a shaft 44, illustrated in Fig. 2, which, in turn, is positioned coaxially with gears 22, 34 and shaft 38. Shaft 44 is capable of translating this said axis and contains an engaging notch 46 to engage a lever 48 rigidly attached to walking beam 26.

The motion of shaft 14 will rotate cam 40, causing cage 42 to oscillate together with shaft 44. The movement of shaft 44 will create a rocking motion for walking beam 26, and that walking motion will be transmitted through link 28 to gear 34 and gear 36. The entire bracket 24 and walking beam and link assembly 26, 28 rotate around the axis of shaft 44 as bracket 24 is rigidly attached to sleeve 50 which is likewise rigidly attached to gear 22. As walking beam 26 rocks, it will provide an accelerative or decelerative force to gear 34 and gear 36, depending upon what portion of the cycle the mechanism is in. This will generate a harmonic velocity for gear 34 and...