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SHAFT MOUNTING AND ELECTRICAL GROUNDING DEVICE

IP.com Disclosure Number: IPCOM000026033D
Original Publication Date: 1989-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 4 page(s) / 181K

Publishing Venue

Xerox Disclosure Journal

Abstract

Figure 1 illustrates an elevational view of a shaft 10 supported by a pair of mountings 12 and 14. Mountings 12 and 14 are identical to one another. Both mountings are mounted on a frame 16 which is electrically grounded. Frame 16 may be electrically grounded by a ground strap or by any other suitable device. An electrical grounding brush, indicated generally by the reference numeral 18, is mounted on mounting 12. Grounding brush 18 electrically connects shaft 10 with mounting 12. Both shaft 10 and mounting 12 are electrically conductive. Mounting 12 is mounted on electrically grounded frame 16. Thus, an electrical path is provided for electrically grounding shaft 10. Grounding brush 18 includes a support 20 having a multiplicity of fibers 22 extending outwardly therefrom. The free end region of fibers 22 contact shaft 10. Support 20 and fibers 2 are electrically conductive. Further details of mounting 12 and ground brush 18 will be discussed hereinafter with reference to Figures 2 and 3.

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Page 1 of 4

EROX DISCLOSURE JOURNAL

SHAFT MOUNTING AND ELECTRICAL GROUNDING DEVICE
Richard F. Scarlata

Proposed Classification

U.S. c1.439195 Int. C1. HOlr

i'

30

34

FIG. 2

32

12

FlG.3 38

Volume 14 Number 5 September/October 1989 267

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Page 2 of 4

SHAFT MOUNTING AND ELECTRICAL GROUNDING DEVICE

(Cont'd)

Figure 1 illustrates an elevational view of a shaft 10 supported by a pair of mountings 12 and 14. Mountings 12 and 14 are identical to one another. Both mountings are mounted on a frame 16 which is electrically grounded. Frame 16 may be electrically grounded by a ground strap or by any other suitable device. An electrical grounding brush, indicated generally by the reference numeral 18, is mounted on mounting 12. Grounding brush 18 electrically connects shaft 10 with mounting 12. Both shaft 10 and mounting 12 are electrically conductive. Mounting 12 is mounted on electrically grounded frame 16. Thus, an electrical path is provided for electrically grounding shaft
10. Grounding brush 18 includes a support 20 having a multiplicity of fibers 22 extending outwardly therefrom. The free end region of fibers 22 contact shaft 10. Support 20 and fibers 2 are electrically conductive. Further details of mounting 12 and ground brush 18 will be discussed hereinafter with reference to Figures 2 and 3.

Referring now to Figure 2, there is shown a perspective view of the mounting, indicated generally by the reference numeral 12, and grounding brush 18. A bearing, indicated generally by the reference numeral 24, is mounted in aperture or circular hole 26 of mounting 12. The outer race of bearing 24 is in molded non-rotative engagement with mounting 12. Mounting 12 and bearing 24 are formed integrally with one another. Bearing 24 is automatically inserted into a mold and the mounting material is injected therein. Upon curing, the mounting, with the bearing molded integrally therewith, is removed from the mold. In this way, mounting 12 is molded around the outer race of bearing 24 in such a way as to capture it. This prevents axial movement of the bearing relative to the mounting. Without this design feature, the mounting would creep under induced stress. This would, in time, result in axial separation of the bearing from the mounting. Mounting 12 is mounted in the frame of a machine. The inner race of bearing 24 supports shaft 20 rotatably. The shaft is press fit into the inner race of bearing 24 to rotate in unison therewith. One surface of mounting 12 has a cylindrical region 28 extending outwardly therefrom. The other surface, opposed from cylindrical region 28, has a D-shaped region 30 extending outwardly therefrom. This enables mounting 12 to be mounted either in a circular opening in the frame by using cylindrical region 28 as the mounting region, or in a D-shaped opening in the frame by using D-shaped region 30 as the mounting region. In addition, mounting 12 has a slot 32 on surface 34 and a slot (not...