Tap holder
AssigneeSugino Machine Limited
InventorMinoru Ihara
Life of this patent
Estimating the term…
Abstract
A tap holder having a simple structure and high runout accuracy is provided. A tap holder includes: a body having a collet holder hole having an opening toward distal end; a tap collet received in the collet holder hole, the tap collet having a tap mounting hole located at a distal end portion, and a sleeve hole located at a basal end portion; a torque transmission mechanism that transmits rotation of the body to the tap collet; a first elastic body disposed between the body and the tap collet to urge the tap collet toward distal end; a sleeve disposed to the body by received in the sleeve hole to prevent the tap collet from slipping off toward distal end; and a second elastic body disposed between the sleeve and the tap collet to urge the tap collet toward basal end.
Claims14
A tap holder, comprising:
- a body having a collet holder hole having an opening toward distal end;
- a tap collet received in the collet holder hole, the tap collet configured to advance and retract, the tap collet having
- a tap mounting hole located at a distal end portion, and
- a sleeve hole located at a basal end portion;
- a torque transmission mechanism configured to transmit rotation of the body to the tap collet;
- a first elastic body disposed between the body and the tap collet, the first elastic body configured to urge the tap collet toward distal end;
- a sleeve disposed in the body by being received in the sleeve hole, the sleeve configured to prevent the tap collet from slipping off toward distal end;
- and
- a second elastic body disposed between the sleeve and the tap collet, the second elastic body configured to urge the tap collet toward basal end;
- wherein the sleeve hole is a stepped through-hole, the sleeve hole has
- a large-diameter portion located at a distal end portion, and
- a small-diameter portion located at a basal end portion,
- the sleeve includes
- a flange having a larger diameter than the small-diameter portion, the flange disposed inside the large-diameter portion, and
- a cylindrical portion received in the small-diameter portion, and
- the second elastic body is disposed between the flange and the large-diameter portion.
Dependencies are inferred from the claim text.