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Browse Prior Art Database

D-Cut Taper Gear

IP.com Disclosure Number: IPCOM000113130D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Hada, T: AUTHOR [+3]

Abstract

This article relates to a gear drive, timing belt drive, and other means which enable precise rotational movement. Conversion and efficient torque transfer usually have the velocity conversion and torque transfer mechanical parts (gear, pulleys, etc.) fixed onto a drive shaft.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 95% of the total text.

D-Cut Taper Gear

      This article relates to a gear drive, timing belt drive, and
other means which enable precise rotational movement.  Conversion and
efficient torque transfer usually have the velocity conversion and
torque transfer mechanical parts (gear, pulleys, etc.) fixed onto a
drive shaft.

      Conventional methods to fix the mechanical part onto the shaft
uses either 1) Screw or Set Screw, 2) Spring Pin, or 3) Key.

      The subject invention introduces a new method of affixing the
mechanical part onto the shaft which further reduces the parts cost,
improves the ease of assembly, and improves the ease of replacement.

      These improvements and cost reduction are realized through
special shape of the hole in the mechanical part.  The shaft is cut
along the axis of the shaft so that the cross section at any point
will have a uniform "D" shape or a truncated circle.  The hole of the
mechanical part is shaped so that the inner wall of the hole is
tapered to form a part of a cone which is truncated along the conical
axis.

      The pressure between inner wall of the hole and the shaft will
gradually increase as the mechanical part is fitted onto the shaft.
This method eliminates the need of screws, etc., to keep the
mechanical part in place and is virtually free from mechanical play.

      This D-cut taper gear (pulley ...etc.) can be used by any
machine which utilizes a paper feed mechanism.  Some examples are
printers, scanners,...