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Motor Encoder

IP.com Disclosure Number: IPCOM000039764D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Siders, LT: AUTHOR

Abstract

Ease of assembly of a motor encoder is improved along with decreasing the complexity of the parts. A motor 1 (Fig. 1) has a mounting plate 2 attached to its end 3 by screws 4. The screws 4 extend through holes 5 in the mounting plate 2 and into threaded holes 6 in the end 3 of the motor 1. A hub 7 has an encoder disc 8 attached thereto by screws 9 extending through holes 10 in the disc 8 and into holes (not shown) in the hub 7. The hub 7 is positioned in a desired axial position on a shaft 11 of the motor 1 after the mounting plate 2 is attached to the motor 1 (Image Omitted) and held in position by a Tinnerman clip 12 (Fig. 2). The disc 8 has a plurality of slots 13 around the circumference of the same size and equally angularly spaced from each other.

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Motor Encoder

Ease of assembly of a motor encoder is improved along with decreasing the complexity of the parts. A motor 1 (Fig. 1) has a mounting plate 2 attached to its end 3 by screws 4. The screws 4 extend through holes 5 in the mounting plate 2 and into threaded holes 6 in the end 3 of the motor 1. A hub 7 has an encoder disc 8 attached thereto by screws 9 extending through holes 10 in the disc 8 and into holes (not shown) in the hub 7. The hub 7 is positioned in a desired axial position on a shaft 11 of the motor 1 after the mounting plate 2 is attached to the motor 1

(Image Omitted)

and held in position by a Tinnerman clip 12 (Fig. 2). The disc 8 has a plurality of slots 13 around the circumference of the same size and equally angularly spaced from each other. A socket 14 has sensor pairs with each sensor pair including a light source 15 and a light detector 16. For example, the light source 15 may be an infrared emitting diode sold by TRW Optoelectronics as OP140IED, and the light detector 16 may be an infrared sensitive sensor sold by TRW Optoelectronics as OPL550 photologic sensor. The socket 14 is mounted on a circuit board 17 to which a connector 18 having a plug 19 is connected. The socket 14 is inserted into a sensor mask 20. The socket 14 has portions 21 and 22 positioned on outer sides of substantially parallel walls 23 and 24 of the mask
20. The portion 21 of the socket 14 has projections 25 on its end for passing over cam surfaces 26 on the mask 20 for retaining the socket 14 in position.

(Image Omitted)

The mask 20 has a first set of aperture slits 27 (Fig. 3) in the wall 23 and a second set of aperture slits 28 (Fig. 4) i...