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PLANETARY GEAR MECHANISM

IP.com Disclosure Number: IPCOM000025719D
Original Publication Date: 1987-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 77K

Publishing Venue

Xerox Disclosure Journal

Abstract

A lanetary gear mechanism enabling the engagement and disengagement of a B rive between two subsystems comprises a drive gear 1 having a release arm 2 pivoted about the axis of drive gear 1. The release arm 2 supports an idler gear 3 which is urged into engagement with a driven gear 6 by a return spring 4. The release arm 2 has at its end remote from the drive gear 1 a cam 7 the center line of which is coincident with the axis of the idler gear 3. The driver gear 6 has an actuating cam 5 fixed to its shaft 8, the center line of cam 5 being coincident with the axis of shaft 8. The inter-axis distance between the idler gear 3 and driver gear 6 is determined by the radius of the release arm 2 or cam 7 and the actuator cam 5. When the shaft 8 is moved axially so that the actuating cam 5 and driver gear 6 assembly move towards the release arm cam 7 the actuating cam 5 engages cam 7 and the release arm 2 is pivoted anti-clockwise thereby disengaging the idler gear 3 from the drive gear 6 as shown in Figure 2. As the actuating cam 5 passes over the crest of release arm cam 7 to release arm 2 pivots clockwise to bring the idler gear 3 and driver gear 6 back into engagement. The direction of rotation maintains meshing by cramming, but over cramming is prevented by the correct center distance being maintained by the radii of the release arm 2 and actuating cam 5.

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XEROX DISCLOSURE JOURNAL

PLANETARY GEAR MECHANISM Proposed Classification
R. A. Fink U.S. Cl. 74/750 R Int. C1. F16h 3/44

Volume 12 Number 4 July/August 1987 16 7

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PLANETARY GEAR MECHANISM (Cont'd)

A lanetary gear mechanism enabling the engagement and disengagement of a

B rive between two subsystems comprises a drive gear 1 having a release arm
2 pivoted about the axis of drive gear 1. The release arm 2 supports an idler gear 3 which is urged into engagement with a driven gear 6 by a return spring


4. The release arm 2 has at its end remote from the drive gear 1 a cam 7 the center line of which is coincident with the axis of the idler gear 3. The driver gear 6 has an actuating cam 5 fixed to its shaft 8, the center line of cam 5 being coincident with the axis of shaft 8. The inter-axis distance between the idler gear 3 and driver gear 6 is determined by the radius of the release arm 2 or cam 7 and the actuator cam 5. When the shaft 8 is moved axially so that the actuating cam 5 and driver gear 6 assembly move towards the release arm cam 7 the actuating cam 5 engages cam 7 and the release arm 2 is pivoted anti-clockwise thereby disengaging the idler gear 3 from the drive gear 6 as shown in Figure 2. As the actuating cam 5 passes over the crest of release arm cam 7 to release arm 2 pivots clockwise to bring the idler gear 3 and driver gear 6 back into engagement. The direction of rotation maintains m...