Self-tightening rotary tool holding system
AssigneesRobert Bosch Tool Corporation, Robert Bosch GmbH
InventorsJeremy Rubens, Chris Dvorak
Life of this patent
Estimating the term…
Abstract
A tool holding system for a rotary power tool is configured to clamp around a working tool when the working tool is inserted in the tool holding system. The tool holding system includes a sleeve having a frustroconical inner surface portion, a collet having frustoconical outer surface portion complementary to the inner surface portion, a spring mount operably connected to a motor for rotation by the motor, and a spring. The spring includes a first end portion operably connected to the collet to bias the collet toward a first position whereat the outer surface portion engages the inner surface portion, and a second end portion rotationally fixed with respect to the spring mount.
Claims7
A rotary power tool comprising:
- a first collar rotationally fixed with respect to an output shaft of a power tool and including a first shank receiving opening having a longitudinal axis;
- a second collar rotationally movable about the longitudinal axis with respect to the output shaft and including at least one inclined outer surface;
- and
- at least one lever pivotably connected to the first collar and rotationally movable about the longitudinal axis relative to the second collar, the at least one lever including a first end portion configured to engage the at least one inclined outer surface and a cam located at a second end portion, the cam extending into the first shank receiving opening such that upon rotation of the output shaft in a first rotational direction, the at least one inclined outer surface is forced against the first end portion thereby forcing the cam toward the longitudinal axis.
Dependencies are inferred from the claim text.