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Rotation Restraint for Small Electrical Motor End Bells

IP.com Disclosure Number: IPCOM000087764D
Original Publication Date: 1977-Mar-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Wheeler, SE: AUTHOR

Abstract

The rotation restraint for the end bells 1 and 7 with respect to the case 2 of electric motor 8 includes dimpled areas 5 of case 2, which are punched inwardly into depressions 4 in bells 1 and 7 so as to lock end bells 1 and 7 permanently in place with respect to case 2.

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Rotation Restraint for Small Electrical Motor End Bells

The rotation restraint for the end bells 1 and 7 with respect to the case 2 of electric motor 8 includes dimpled areas 5 of case 2, which are punched inwardly into depressions 4 in bells 1 and 7 so as to lock end bells 1 and 7 permanently in place with respect to case 2.

Motor 8 is fixed by end bells 1 and 7 with respect to sheet metal plates 6 and 12. Pivot rods 13 and 14 are fixed to plates 6 and 12 and may pivotally mount motor 8 with respect to a stationary machine frame. Motor 8 and plates 6 and 12 may pivot in direction 10.

During shipment, plate 12 is held stationary by pin 15 extending through plate 12. If, during shipment, an impact or shock load in direction 9 is applied to motor 8, this then causes a twisting moment 11 to exist which can cause one mount plate 6 to tend to rotate with respect to the other mount plate 12. In this case, unless the end bells 1 and 7 are permanently attached to case 2, such rotation of one mount plate with respect to the other may occur, even though the usual screws 3 are used that extend through bells 1 and 7 and through case 2. A rotation of the mount plates caused by loading in direction 9 will misalign the motor shaft center line with respect to the pivot center line about rods 13 and 14 and can cause problems, such as poor belt tracking, to occur, assuming that the output shaft of motor 8 is used for driving a belt.

Deformed case portions 5 which should be used in...