Grab and cover mechanism

The utility model provides a grab and cover mechanism, include: casing, piston slidable ground set up in the stroke chamber, the upper end at the connecting rod is fixed to the piston, cutting somebody's hair to the rotary -table in the top, cuts somebody's hair and fix the lower extreme at the connecting rod in the top, the lower extreme of pull rod has the third stop ring, and pull rod sleeve establishes on the connecting rod, fixed establishment, the fixed establishment cover fixes on on the pull rod between a thread turns groove and the third stop ring, adjusting nut, adjusting nut threaded connection is on a thread turns groove, reset spring, the reset spring cover is established on the pull rod, and adjusting nut is supported in reset spring's upper end, and the lower extreme supports fixed establishment, a plurality of calvuss, a plurality of calvuss constitute disc claw utensil, have first scrobicular ring on the inner wall of disc claw utensil, and third stop ring card is established in first scrobic