Browse Prior Art Database

Fixing an Arm or Lever to a Shaft

IP.com Disclosure Number: IPCOM000074613D
Original Publication Date: 1971-May-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Markley, RF: AUTHOR

Abstract

The attachment fixes an arm or lever 10 with respect to a shaft 12 without pinning, welding, or the use of set screws.

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Fixing an Arm or Lever to a Shaft

The attachment fixes an arm or lever 10 with respect to a shaft 12 without pinning, welding, or the use of set screws.

The attachment comprises two collars 14 and 16. Collar 14 has a sliding fit over shaft 12 and has an exterior surface 14a which is coned at a small angle b. Collar 16 fits into an opening 10a in lever 10 and has an inner conical surface 16a with the same taper as the external surface 14a.

With lever 10 positioned on collar 16, and collar 14 positioned on shaft 12, collars 14 and 16 are forced together with sufficient force to cause plastic flow of the metal of collars 14 and 16 so that collar 14 is compressed to grip shaft 12, and collar 16 is expanded to grip lever 10, thus making a permanent assembly of parts 10, 12, 14, and 16. With angle b being six degrees or less, collars 14 and 16 are self locking with respect to each other. Additional strength of the attachment can be obtained by knurling shaft 12 and collars 14 and 16. The addition of an anaerobic adhesive to the contacting surfaces of parts 10, 12, 14, and 16 also increases the torque capacity of the attachment.

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