Browse Prior Art Database

UNIVERSAL POWDER METAL PULLEY INSERT FOR LOW QUANTITIES USAGE

IP.com Disclosure Number: IPCOM000027747D
Original Publication Date: 1999-Apr-30
Included in the Prior Art Database: 2004-Apr-09
Document File: 4 page(s) / 130K

Publishing Venue

Xerox Disclosure Journal

Abstract

Referring to Figures 1 and lA, a universal powder metal pulley insert assembly 10 for use in low quantity production of plastic gears and pulleys is shown. The insert assembly 10 includes an insert 14 and a tolerance ring 16. The insert assembly 10 provides for a pulley assembly which with minor modifications may serve a variety of shaft diameter sizes. In this configuration, a plastic gear or pulley 18 may mate with a variety of different inserts 14 each of the varying inserts 14 having a different central hole for accommodating a

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

UNIVERSAL POWDER METAL PULLEY INSERT FOR LOW QUANTITIES USAGE Duane H. Fisk

Proposed Classification
U. S. C1.4741094 Int. C1. F16d 3/00

FIG. 7

FIG. 7A

XEROX DISCLOSURE JOURNAL - Vol. 24, No. 2 MarcMApril 1999 101

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IJNIVERSAL POWDER METAL PULLEY INSERT FOR LOW QUANTITIES USAGE (Cont'd)

FIG. 2

FIG. 2A

-76

\

74

- 70

- 70

FIG. 3

FIG. 4

Referring to Figures 1 and lA, a universal powder metal pulley insert assembly 10 for use in low quantity production of plastic gears and pulleys is shown. The insert assembly 10 includes an insert 14 and a tolerance ring 16. The insert assembly 10 provides for a pulley assembly which with minor modifications may serve a variety of shaft diameter sizes. In this configuration, a plastic gear or pulley 18 may mate with a variety of different inserts 14 each of the varying inserts 14 having a different central hole for accommodating a

102 XEROX DISCLOSURE JOURNAL - Vol. 24, No. 2 MarcMApril 1999

[This page contains 1 picture or other non-text object]

Page 3 of 4

UNIVERSAL POWDER METAL PULLEY INSERT FOR LOW QUANTITIES USAGE (Cont'd)

particular size shaft. A common plastic gear or pulley can thus be used regardless of the shaft size.

The insert 14 includes a central hole or bore to which a shaft 20 is fitted. The insert 14 is preferably made of an alloy metal carbon steel and is manufactured by powder metal technology. The mold in which the powder metal insert 14 is manufactured includes a interchangeable core rod (not shown). A series of interchangeable core rods with different diameters may be placed in a common powder metal mold best providing for a wide variety of powder metal inserts accommodating a wide variety of shafts with little tooling change.

The insert 14 includes a tubular portion 22 and a shoulder portion 24. The tubular portion 22 includes an outer periphery 26 upon which the tolerance ring 16...