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High Speed Coupling

IP.com Disclosure Number: IPCOM000037007D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Chellgren, JJ: AUTHOR [+3]

Abstract

The figures illustrate a coupling that is effective in minimizing axial vibration transmitted from a motor shaft to a spindle shaft rotating at high speed. The device provides low axial vibration, high torsional stiffness, low axial stiffness, and electrical isolation.

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High Speed Coupling

The figures illustrate a coupling that is effective in minimizing axial vibration transmitted from a motor shaft to a spindle shaft rotating at high speed. The device provides low axial vibration, high torsional stiffness, low axial stiffness, and electrical isolation.

In Fig. 1, a coupling 1 connects a shaft 2 of drive motor 3 to a shaft 4 of spindle assembly 5. It transmits torque from motor 3 to spindle 5 and rotates around axis X-X at its angular velocity.

(Image Omitted)

In Fig. 2, the torque is carried by steel pins 6 mounted in the male half of a coupling 7. The steel pins are engaged with a polymer nest 8 in the female half of a coupling 9. Driving pins 6 are free to float axially in polymer nests 8, minimizing the axial transmission of vibration. The polymer provides both the electrical and mechanical isolation of the connected shafts.

Both halves of the device use a split hub design 11 to engage the shaft. Cap screws 10, arranged symmetrically, provide the clamping force to lock both halves in axial and angular alignment with the shafts.

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