Electric screw driver

Electric screw driver

CN
  • CN 103,381,584 A
  • Filed: 07/04/2013
  • Published: 11/06/2013
  • Est. Priority Date: 07/04/2013
  • Status: Active Application
First Claim
Patent Images

1. an electric screw driver, comprise handle casing (1), handle cap (2), motor (3) and control circuit, slow down to become and turn round case, main shaft (4), screwdriver bits (5), described motor (3) and control circuit, slow down to become and turn round case, main shaft (4) all is installed in described handle casing (1), and described main shaft (4) passes handle cap (2) and is connected with screwdriver bits (5), it is characterized in that:

  • described deceleration change is turned round case and is comprised casing (20), push rod (201), collar (202), trim ring (203), torque spring (204), torsion seat (205), torsion regulating sleeve (206), lock sleeve (207), lock sleeve spring (208), ring gear (209), planetary wheeling assembly (210), the rear end of casing (20) is a cylindrical cavity, on the tank wall of casing (20) front end, two circumferential axially extending bores is arranged, and through hole extends through in cavity outside casing (20), two push rods (201) penetrate in two through holes, trim ring (203), torque spring (204), collar (202), be enclosed within successively casing (20) front end neck, trim ring (203) is pressed in push rod (201) front end, torsion seat (205) rear portion is pressed on collar (202), torsion regulating sleeve (206) is enclosed within torsion seat (205) front end neck and is locked by lock sleeve (207), main shaft (4) is arranged in the neck of casing (20) by bearing, ring gear (209) embeds the cavity of casing (20), there is semicircle concave surface the rear end of push rod (201), the front end face of ring gear (209) has two rollers (211) tangent with the concave surface on push rod (201), ring gear (209) is connected with the output gear of motor (3) by two-stage planetary wheeling assembly (210).

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