Self Compensation Setscrew Lock
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
When setscrews holding cams to shafts vibrate loose, it is desirable to have some technique by which the cam will not rotate relative to the shaft. The device disclosed above illustrates a cam member 10 which is encircling shaft 12. A conventional key 14 is located in keyway 16 of shaft 12. Cam 10 is threaded to accept a setscrew 18 to engage key 14. At a position roughly 90 Degrees from key 14 and setscrew 18 is a second opening 20 to admit a second setscrew 22. Setscrew 22 is threadedly engaged with the threads 24 formed into spring member 26. Spring member 26 is contained within a cavity 28 within the confines of the cam 10. As setscrew 18 is tightened, the key 14 is forced into keyway 16. This removes any cam-to-shaft clearance in the region 30.