2results about How to "Avoid sliding wear" patented technology

The utility model discloses a kind of impact drill bits of quick replacement, including drill bit positioning seat, the flange of one end of drill bit positioning seat is connected on impact electric drill, the other end of drill bit positioning seat is rotatably connected with drill bit mounting seat, the part of drill bit mounting seat exposing drill bit positioning seat is inserted with drill bit body, the part of drill bit mounting seat in drill bit positioning seat is fixed with driving shaft, the output end of driving shaft is connected with impact electric drill, limit component is installed on drill bit mounting seat, locking assembly for driving limit component limit drill bit body is installed on drill bit positioning seat, screw sleeve, sleeve is moved in the process of thread rotation along drill bit positioning seat outer wall, drive connecting block to move downwards, so that inclined plane extrudes inclined block, locking block can be embedded in outer concave ring, can hinder connecting column to come out of drill bit mounting seat, reverse rotation sleeve, under the elastic force of reset spring, locking block will automatically separate from outer concave ring.

The present application relates to the technical fields of precision machining, and discloses a precision elastic self-centering clamp with a steel ball bushing, which comprises a clamp connecting disc, a first air inlet channel being formed in the middle of the clamp connecting disc, a chuck steel sleeve connected with an elastic chuck, a clamp piston connected with the elastic chuck, a steel ball bushing being arranged between the clamp piston and the chuck steel sleeve, the clamp piston being slidably connected with the chuck steel sleeve through the steel ball bushing in the axial direction, and the clamp piston being used for clamping or loosening the elastic chuck; a gas conveying channel being defined in the clamp connecting disc and being communicated with the first air inlet channel, and a gas cavity being defined between the clamp piston and a piston gland and being communicated with the gas conveying channel. The clamp piston is slidably connected with the chuck steel sleeve through the steel ball bushing, and then drives the elastic chuck to clamp or loosen the workpiece. There is no friction between the elastic chuck and the workpiece, and there is no gap after the elastic chuck clamps the workpiece, so that the workpiece clamping stability can be improved, and clamping errors and elastic chuck abrasion can be avoided.