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Periodically Reversing Input Shaft Rotation Converted to Continuously Unidirectional Output Shaft Rotation

IP.com Disclosure Number: IPCOM000041256D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Hedrick, DR: AUTHOR

Abstract

Dual combination bevel gear and pawl units driven by a common input bevel gear, which periodically reverses direction of rotation, transmit continuous motion to an output shaft in one direction only. The figure shows an exploded view of the present embodiment. It is seen that output shaft 1 is equipped with two ratchets 2 and 3, both facing the same way, which are engaged by pawls 4 integral to two bevel gears 5 and 6. It is seen that gears 5 and 6 mesh with and are driven by a beveled gear portion 7 of combination input gear 8. Gear 8 is driven by spur gear portion 9 being meshed with spur gear 10 mounted on input shaft 11. Input shaft 11 periodically alternates direction of rotation between A and B. It is apparent that when gear 10 rotates in direction A, gears 9, 6 and 5 also rotate in direction A.

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Periodically Reversing Input Shaft Rotation Converted to Continuously Unidirectional Output Shaft Rotation

Dual combination bevel gear and pawl units driven by a common input bevel gear, which periodically reverses direction of rotation, transmit continuous motion to an output shaft in one direction only. The figure shows an exploded view of the present embodiment. It is seen that output shaft 1 is equipped with two ratchets 2 and 3, both facing the same way, which are engaged by pawls 4 integral to two bevel gears 5 and 6. It is seen that gears 5 and 6 mesh with and are driven by a beveled gear portion 7 of combination input gear 8. Gear 8 is driven by spur gear portion 9 being meshed with spur gear 10 mounted on input shaft 11. Input shaft 11 periodically alternates direction of rotation between A and B. It is apparent that when gear 10 rotates in direction A, gears 9, 6 and 5 also rotate in direction
A. It is seen that as gears 5 and 6 rotate in direction A, pawls 4 of gear 5 slip over the teeth of ratchet 2, and pawls 4 of gear 6 engage the teeth of ratchet 3. It is seen that gear 6 thus drives shaft 1 in direction C. It is apparent that when input shaft 11 reverses and rotates in direction B, all the gears also rotate in direction
B. This results in gears 5 and 6 exchanging roles. Rotating in direction B, pawls 4 of gear 6 slip over the teeth of ratchet 3, and pawls 4 of gear 5 engage the teeth of ratchet 2. It is seen that it is now gear 5 that drives shaft...