| 摘要 |
A shearing handpiece rear section for connection between a drive tube assembly and a handpiece front section which includes a cutter and driving fork, and comprising an outer casing, a tubular bushing threaded therein and connected with a partly encircled tubular joint by a circlip to permit relative rotation and prevent axial displacement between the bushing and the joint, a drive shaft extending through the casing and journalled at opposite end portions in bearings supported in respective ones of the bushing and the joint, a crank head upon a forward end of the shaft and provided with clearance from a forward end of the bushing, and a drive cog upon a rearward end of the shaft and abutting the bearing in said joint, so that with axial thrust on the handpiece contact of said crank head with said bushing is avoided. |
