| 摘要 |
982,817. Slip couplings. ERICKSON TOOL CO. April 3, 1963 [Jan. 10, 1963], No. 13213/63. Heading F2U. [Also in Division B3] A slipping clutch tapping attachment comprises a chuck body 1, Fig. 1, a housing 4, having portions 4a and 4b of different diameters, which is keyed to body 1 to allow relative axial movements, an adjustable clutch drive formed by plates 10, 13, and a chuck 5. Plates 10 which may be of brass, have projections 11 which are carried in grooves 9 in portion 4b, and plates 13 which may be of steel have projections 14 which are carried in grooves 12 formed in the shank 7 of chuck 5. The torque at which the clutch slips is adjusted by a nut 15, which tightens the clutch plates against a spring washer 16, and is locked by a set screw 17. Portion 4a is axially slidably keyed to body 1 by a pin 19 in a bush 20 which is keyed to shank 2 for rotation therewith, and the pin is held in place by a rod 25. In a modification, Fig. 6, housing 4 is keyed for rotation with the chuck body at 60. U.S.A. Specification 2,778,648 is referred to. |
