| 摘要 |
<p>592,701. Tapping; inserting studs. DODD, J. Aug. 29, 1945, Nos. 22222 and 27698. [Class 83 (iii)] In a machine attachment for tapping holes or screwing up studs &c. and embodying a slipping clutch, the members of the clutch are held in engagement by a cushion of rubber or like resilient material which is deformed to regulate the pressure between the clutch members. The driving element 7 of the clutch is axially slidable in a housing 2 and on the driving spindle 5, the rubber &c. cushion being packed between the back of the clutch member and the end of the housing, such cushion being cylindrical in form or, as shown, in the form of a series of rings 9. The driven clutch member 11 is rotatably mounted and secured against relative axial movement in a flanged screwed sleeve 13 engaging the housing 2. Adjustment of the sleeve varies the compression of the rings 9 and therefore the pressure between the clutch teeth 8. Similar cushioning means 28 is provided between the end of a centring stud 30 and a counterbore in the extension 12 of the driven clutch member to prevent damage to screw-threads on the withdrawal of a tap. The housing 2 may be calibrated to indicate the pressure on the clutch teeth. Sockets.-Tke tool adaptor 18 is keyed to the holder 22 and is secured by rotating an outer sleeve 23 to wedge steel balls against the adaptor.</p> |
