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IMPROVED FORWARD REVERSE GEARBOX

IP.com Disclosure Number: IPCOM000027673D
Original Publication Date: 1998-Oct-31
Included in the Prior Art Database: 2004-Apr-08
Document File: 4 page(s) / 182K

Publishing Venue

Xerox Disclosure Journal

Abstract

A prior art forward reverse gearbox 10 is shown in Figure 1. The gearbox 10 is to provide output in both a forward rotating direction as for example, shown by arrow 12, as well as a reverse direction as shown in the direction of arrow 14, with an input in the direction of arrow 16. The gearbox 10 thus provides both forward rotational motion as well as reverse rotational motion. Such a gearbox may be used in a multitude of machinery applications,

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XEROX DISCLOSURE JOURNAL

IMPROVED FORWARD REVERSE GEARBOX
Daniel L. Carter

Proposed Classification
U. S. C1. 074/640 Int. C1. F16h 33/00

78

I

20

FIG. 7

XEROX DISCLOSURE JOURNAL - Vol. 23, No. 5 September/October 1998 193

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IMPROVED FORWARD REVERSE GEARBOX (CONT'D)

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IMPROVED FORWARD REVERSE GEARBOX (CONT'D)

for example, in copy and printing machines. The gearbox may be used to invert sheets in a copy handling module. In a copy handling module, a sheet is fed into the inverter and stopped for a short period of time. The sheet is then fed out in the reverse direction. The standard gearbox 10 uses two electrically controlled frictional clutches and a drag brake to stop the assembly in a short time.

The gearbox 10 includes a first electrically controlled frictional clutch 18 as well as a second electrically controlled frictional clutch 20. The forward and reverse direction are accomplished by connecting the first and second shaft assemblies 26 and 28 with an electrical clutch and a gearset at one end of the gearbox and with an electrical clutch and a belt and pulley set at the other end of the gearbox. Gears 30 and 31 spin in the direction of arrows 32 and 34, respectively, and the belt 25 and pulley 36 spin in the direction of arrow
37. The forward direction of rotation 12 is accomplished by engaging the electrical clutch 20 on the gearset causing the second shaft 28 to rotate in the direction of arrow 32. The reverse direction of rotation is accomplished by engaging the electrical clutch 18 on the pulley 36 causing the second shaft of 26 to rotate in the direction of arrow 14.

Now referring to Figure 2, in gearbox 38, the first clutch 18 is replaced by a slipclutch 40. The slipclutch 40 provides for positive rotation in the first direction of arrow 44 and a slip in the direction of arrow 42 when a force of greater than 15 ounces is applied. The slipclutch 40 is furedly attached to first shaft 46 and first gear 48 as likewise secured to first shaft 46. On second shaft 50, which serves as the output shaft, second pulley 52 is fixedly attached to the shaft 50 and the clutch 54 is fmedly attached to the shaft 50.

To provide for forward rotation, the first shaft 46 which rotates in the direction of arrow 55 causes the first gear 48 to rotate in the direction of arrow 56. The second gear 58 rotates in the direction of arrow 60 opposed to the direction of the first gear 48. The second gear 60 is secured to the clut...