Mandrel assembly for use with a rotary tool
AssigneesRobert Bosch Tool Corporation, Robert Bosch GmbH
InventorsAndres David Salazar Tello, Kevin Wasielewski
Life of this patent
Estimating the term…
Abstract
A mandrel assembly may be used with a rotary power tool to provide a reliable and stable connection between the rotary tool and a tool accessory. The mandrel assembly provides a quick-connect/quick-release connection between the tool output shaft and the accessory via a clamping action. In particular, the mandrel assembly is movable between first and second configurations. In the first configuration, the accessory may clamped between a clamping element formed on one end of the mandrel and a collar which surrounds the mandrel. In the second configuration, the accessory may be loaded onto or detached from the mandrel assembly.
Claims16
A mandrel assembly, comprising:
- a mandrel including
- a mandrel first end having a mandrel clamping element,
- a mandrel second end that is opposite the mandrel first end,
- a longitudinal axis that extends through the mandrel first end and the mandrel second end, and
- a slot provided in an outer surface of the mandrel;
- a collar that surrounds the mandrel, the collar including
- a collar first end,
- a collar second end that is opposite the first end, and
- a sidewall that extends between the collar first end and the collar second end, the sidewall including an inner surface that defines a bore, the bore opening at the collar first end and the collar second end, the bore having a step change in diameter that defines a collar inner shoulder, and
- a pin that protrudes from a surface of the bore and is received in the slot;
- a retention washer fixed to the mandrel between the slot and the mandrel second end;
- and
- a spring that surrounds the mandrel, the spring extending between the retention washer and the collar inner shoulder,
- wherein
- when the collar is moved relative to the mandrel in a first direction, the slot is configured to permit the mandrel to move relative to the collar in both rotation through a first angle about the longitudinal axis and translation in a second direction, the second direction being opposite the first direction, and
- when the collar is moved relative to the mandrel in the second direction, the slot is configured to permit the mandrel to move relative to the collar in both rotation through a second angle about the longitudinal axis and translation in the first direction, the second angle being opposite the first angle.
Dependencies are inferred from the claim text.