3results about How to "Omit structure" patented technology

The utility model relates to a kind of breathable plugs, including outer sleeve and breathable plug, outer sleeve is hollow cylindrical structure, the top of outer sleeve is equipped with top cover, there are multiple breathable holes on the top cover, breathable plug is detachably installed in outer sleeve, breathable plug includes cavity, multiple outer clamping strips are set on the outer wall of cavity top end, outer clamping strip and the inner wall of outer sleeve realize clamping joint, first inner cavity and second inner cavity are equipped in cavity, first inner cavity is located below and is communicated with second inner cavity, the middle of first inner cavity is equipped with through-hole, through-hole diameter is less than the inner diameter of first inner cavity, breathable membrane is equipped above through-hole, breathable membrane is attached on second inner cavity;The bottom of first inner cavity extends annular groove downward, circular breathable liquid-blocking membrane is equipped in annular groove, the diameter of breathable liquid-blocking membrane is greater than the diameter of through-hole, slightly less than the inner diameter of annular groove, annular limiting piece is equipped below breathable liquid-blocking membrane, annular limiting piece is cylindrical hollow structure and annular groove embeddedly connected.

The utility model provides a roller screw bidirectional staggered pre-pressing structure with a built-in elastic sheet, the outer peripheral surface of a screw is provided with a thread structure, a nut is sleeved on the screw, and the inner peripheral surface of the screw is provided with an annular groove section and two limiting grooves. The roller set is arranged between the screw and the nut and comprises a first roller and a second roller which are arranged in a staggered mode, the periphery of each roller is provided with annular teeth, and the annular teeth are meshed with the threaded structure and the annular groove section respectively. The two retaining pre-pressing units are respectively arranged at two opposite ends of the roller group, each retaining pre-pressing unit comprises a retainer and an elastic sheet, the two retainers are respectively provided with a plurality of retaining holes for respectively accommodating the positioning ends of the rollers, and the elastic sheet is provided with elastic upwarp feet which are radially staggered relative to the retaining holes and are respectively propped against the tips of the rollers. Therefore, axial pre-pressing forces in opposite directions are respectively applied to the first roller and the second roller, a bidirectional staggered pre-pressing effect is formed, a gap is compensated, and the transmission precision and the movement stability are improved.

The utility model discloses a kind of milling cutter positioning frame for aluminium, including mounting seat, the lower end of mounting seat is provided with milling cutter, the fixed mechanism for fixing milling cutter is provided between milling cutter and mounting seat, the fixed mechanism includes chuck, threaded sleeve, connecting ring, extrusion ring, tool shank, slot, bolt, the lower end outside surface of mounting seat is provided with chuck, the outside surface of mounting seat is provided with threaded sleeve by screwing, the lower end of threaded sleeve is fixed with connecting ring. The utility model applies synchronous with bolt lock dead to friction lock dead, the relative position accuracy between milling cutter and workpiece can be guaranteed by elastic friction clamping force, the elastic deformation clamping of elastic element can compensate the machining error of mechanical lock dead, and mechanical bolt lock dead ensures that milling cutter will not produce the possibility of tool breakage in processing process, so it can significantly improve the milling cutter positioning and fixing effect of the device.