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Positioning Tab in Hub-To-Shaft Fastening

IP.com Disclosure Number: IPCOM000046943D
Original Publication Date: 1983-Sep-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Holland, EC: AUTHOR [+2]

Abstract

For fastening and positioning to a shaft 1 a hub 2, the latter is provided with an incorporated leaf spring 3 carrying a positioning tab 4 on its end. The tab 4 rests in a matching groove 5 formed on shaft 1. Upon assembling hub 2 to shaft 1 by shifting it from its end part to its inner part, the flexible leaf spring 3 deflects away from the shaft axis and its tab 4 snaps into groove 5, thus fixing and positioning hub 2 relative to shaft 1. Using this design, no setscrews are needed and assembling is simplified, making it extremely well applicable for automated assembling techniques. Fig. 1 depicts, in side and end views, shaft 1 having a flat 7. The groove 5 is formed in this flat so that tab 4 of leaf spring 3 matches in it.

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Positioning Tab in Hub-To-Shaft Fastening

For fastening and positioning to a shaft 1 a hub 2, the latter is provided with an incorporated leaf spring 3 carrying a positioning tab 4 on its end. The tab 4 rests in a matching groove 5 formed on shaft 1. Upon assembling hub 2 to shaft 1 by shifting it from its end part to its inner part, the flexible leaf spring 3 deflects away from the shaft axis and its tab 4 snaps into groove 5, thus fixing and positioning hub 2 relative to shaft 1. Using this design, no setscrews are needed and assembling is simplified, making it extremely well applicable for automated assembling techniques. Fig. 1 depicts, in side and end views, shaft 1 having a flat 7. The groove 5 is formed in this flat so that tab 4 of leaf spring 3 matches in it. In this design, the axial position as well as the radial position of hub 3 relative to shaft 1 is fixed. Fig. 2 depicts, in side and end views, a round shaft 1 having a circular groove 5 formed around its circumference. Tab 4 of leaf spring 3 rides in this groove 5 such that hub 2 is fixed in the axial direction of shaft 1 but may be rotated around it. This design is advantageous for idler rolls or the like fastened to hub 2. Fig. 3 depicts, in side and end views, shaft 1 having a flat 7A and a flat 7B opposite to each other.

The groove 5 in this design has the form of a sawtooth, and several such sawtooth-like grooves 5 are formed adjacent to each other in each flat 7A and 7B extending in the axial...