Browse Prior Art Database

Compliant Spring Coupler

IP.com Disclosure Number: IPCOM000046162D
Original Publication Date: 1983-Jun-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Knepper, JA: AUTHOR [+2]

Abstract

This article describes a flexible spring coupling with a larger outside diameter at one end and a sliding adapter located within the spring coils to enable the coupler to engage a shaft in a sliding manner. The result is a spring coupler with design flexibility since stress sensitivity is minimized. Also, assembly time is reduced and ease of assembly on the manufacturing line and in the field is improved.

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Compliant Spring Coupler

This article describes a flexible spring coupling with a larger outside diameter at one end and a sliding adapter located within the spring coils to enable the coupler to engage a shaft in a sliding manner. The result is a spring coupler with design flexibility since stress sensitivity is minimized. Also, assembly time is reduced and ease of assembly on the manufacturing line and in the field is improved.

Fig. 1 shows a flexible spring coupler 10 with a small outside diameter 11 wound on a shaft 12 of roller 13 located in bearing block 14. The spring coupler also includes a large outside diameter 15 at the opposite end of the spring wound upon a sliding adapter 16 which slides into position on drive shaft 17. Fig. 2 is a sectional view showing the D-shaped configuration of adapter 16 on shaft 17.

This device minimizes stress sensitivity which is inversely proportional to the diameter of the coupler at the drive shaft and, since the adapter allows the coupler to move axially along the drive shaft, the radius of curvature, Rc, in Fig. 1, is not dictated by the drive shaft end position. This allows the spring to seek a position which minimizes bending shear stress and also reduces thrust loads on the bearing block.

Assembly is improved since the coupler, bearing block and adapter may be assembled off-line and simply slipped to place on-line.

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