Browse Prior Art Database

Switching Pivot-Point Mechanism for a Clutch

IP.com Disclosure Number: IPCOM000044414D
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Craft, JA: AUTHOR [+2]

Abstract

The need for adjustment for compensation for part tolerances of a clutch mechanism is eliminated through switching the pivot point of a clutch arm from one portion of the clutch arm to another after the clutch is fully engaged. This avoids the previous requirement of adjustment by a screw and nut. As shown in Fig. 2, a clutch mechanism 1 is biased to an open position by a spring 2 so that a plate 3 of the clutch mechanism 1 engages ends 4 of a clutch-actuating arm 5 to urge an end 6 of the clutch actuating arm 5 against a cam 7. The clutch actuating arm 5 is mounted on a horizontally disposed pivot shaft 8 so that it pivots thereabout when the clutch mechanism is in its open position of Fig. 2. The pivot shaft 8 is supported by a pair of fingers 9 of a spring 10, which is secured by a screw 11 to a fixed motor plate 12.

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Switching Pivot-Point Mechanism for a Clutch

The need for adjustment for compensation for part tolerances of a clutch mechanism is eliminated through switching the pivot point of a clutch arm from one portion of the clutch arm to another after the clutch is fully engaged. This avoids the previous requirement of adjustment by a screw and nut. As shown in Fig. 2, a clutch mechanism 1 is biased to an open position by a spring 2 so that a plate 3 of the clutch mechanism 1 engages ends 4 of a clutch-actuating arm 5 to urge an end 6 of the clutch actuating arm 5 against a cam 7. The clutch actuating arm 5 is mounted on a horizontally disposed pivot shaft 8 so that it pivots thereabout when the clutch mechanism is in its open position of Fig. 2. The pivot shaft 8 is supported by a pair of fingers 9 of a spring 10, which is secured by a screw 11 to a fixed motor plate 12. The motor plate 12 has a slot 13 (Fig. 1) therein to enable a portion 14 of the clutch-actuating arm 5 to extend therethrough to contain movement of the clutch-actuating arm 5. As the cam 7 rotates, its cam rise causes the clutch actuating arm 5 to pivot clockwise about the shaft 8 until the clutch mechanism 1 is closed, as shown in the position of Fig. 3, through the spring 2 (Fig. 2) being compressed by the plate 3 being lifted by the ends 4 of the clutch-actuating arm 5. When the clutch mechanism 1 is closed as shown in Fig. 3, there is still some rise left on the profile of the cam 7 because of the...