A quick tensioning device for a portable machine tool, in particular for an angle grinding machine, includes at least one output shaft which can be rotated, at least one clamping unit that is at least partly arranged in the output shaft and has at least one clamping element, which is movably mounted at least about and/or along a movement axis of the clamping unit, for fixing an insert tool unit to the output shaft without tools, and at least one torque transmission unit for transmitting a torque to the insert tool unit when the insert tool unit is arranged on the output shaft, said torque transmission unit having at least one torque transmission element which is formed separately from the output shaft. The quick tensioning device includes at least one securing unit at least for securing the torque transmission element to the output shaft in a rotationally fixed manner.

The invention relates to a tool device which is suitable for use with a machine tool, in particular a hand guided machine tool, having a driving device moving, in particular in an oscillating manner, around a driving axis. The tool device has an attachment device which allows it to be fastened on a machine tool such that its driving axis and an axis of rotation of the tool substantially coincide. The attachment device, for absorbing the driving force, has at least two driving area regions, which are spaced apart from said tool axis of rotation and each has a plurality of surface points. The tangent planes to said surface-area points are inclined in regard to an axial plane, which encloses the tool axis of rotation. Furthermore, said tangent planes are inclined regard to a radial plane which extends perpendicularly to the tool axis of rotation. This means that the torque introduced into the tool device by the machine tool, via the driving device, is reliably absorbed.

An accessory for coupling to an attachment mechanism of an oscillating power tool includes a working end, an opposite rear end, and a fitment portion adjacent the rear end portion. The fitment portion includes a central opening having a central portion and a rearward portion open to the rear end, and configured to receive a post of a tool clamping mechanism. The fitment portion further includes a first plurality of openings in communication with and extending radially outward from the central portion, a second plurality of openings not in communication with and positioned radially outward from the central portion. The central portion, the first plurality of openings, and the second plurality of openings are configured to couple the fitment portion to a plurality of different configurations of attachment mechanisms for oscillating power tools.

An accessory for coupling to an oscillating power tool includes a working end portion and an attachment portion. The working end portion defines and extends along a working axis. The attachment portion is coupled to the working end portion and includes a top wall, a bottom wall spaced apart from the top wall, and a peripheral wall extending from the top wall to the bottom wall at least partially around the top wall to form at least a portion of a polygonal shape. A generally U-shaped opening is defined in the top wall, extends along an attachment axis at an angle to the working axis, has a central portion at a center of the attachment portion, and is open to a gap in the peripheral wall. A plurality of radial openings is defined in the top wall and arranged between the U-shaped opening and the peripheral wall. The peripheral wall, the U-shaped opening, and the plurality of radial openings are configured to couple the attachment portion to at least two different configurations of accessory attachment mechanisms on different oscillating power tools.

An accessory for coupling to an oscillating power tool includes a working end portion and an attachment portion. The working end portion defines and extends along a working axis. The attachment portion is coupled to the working end portion and includes a top wall, a bottom wall spaced apart from the top wall, and a peripheral wall extending from the top wall to the bottom wall at least partially around the top wall to form at least a portion of a polygonal shape. A generally U-shaped opening is defined in the top wall, extends along an attachment axis at an angle to the working axis, has a central portion at a center of the attachment portion, and is open to a gap in the peripheral wall. A plurality of radial openings is defined in the top wall and arranged between the U-shaped opening and the peripheral wall. The peripheral wall, the U-shaped opening, and the plurality of radial openings are configured to couple the attachment portion to at least two different configurations of accessory attachment mechanisms on different oscillating power tools.

It is an object of the invention to increase the degree of freedom in designing a power tool. A representative power tool has a spindle that transmits a driving force of a motor to a tool accessory, a tool accessory holding member that is configured to be movable in a direction of a spindle rotation axis direction between a holding position for holding the tool accessory and a releasing position for releasing the tool accessory, a lock mechanism that locks the tool accessory holding member in the holding position, and a body housing. The lock mechanism is disposed between a second end of the spindle and a wall of the body housing in the spindle rotation axis direction.

The invention relates to a machine tool, in particular a hand held machine tool, which has a tool-accommodating device which can be moved, in particular in oscillating fashion, about a drive axis, in order to retain a tool device on the machine tool. The tool-accommodating device has at least one clamping device, at least one retaining device and at least one locking device. The retaining device can be moved from at least one first, open position into at least one second, closed position. It is also the case that the retaining device can be forced by a clamping force, by way of the clamping device, preferably in the closing direction from said first, open position in the direction of said second, closed position. The locking device can be moved between at least one first, locking position and at least one second, unlocking position. It is possible here for said locking device to block movement of the retaining device in at least one locking position. A force applied to the locking device directly or indirectly by the tool device moves said locking device from one of said locking positions into one of said unlocking positions. This allows the tool device to be inserted particularly quickly and straightforwardly into the machine tool.

A latching mechanism for a tool spindle or mandrel that latches by pivotally extending a plurality of tensioned arms from a tensioned seated state to a tensioned locked state through rotation of a lock ring pivotally deploying the arms from their nested seated state into a blade engaging position of a larger radius than the radius of the lock ring with the arms in their nested position.

An oscillating power tool system in one embodiment includes a motor, an output power shaft extending along an axis and operably connected to the motor, the output power shaft driven in an oscillatory manner by the motor about the axis, a flange supported by the output power shaft and fixedly positioned with respect to the output power shaft so as to oscillate with the output power shaft when driven by the motor, the flange including a lower surface defining a first plane, and a plurality of mounting pins extending from the flange to a location beneath the first plane, the plurality of mounting pins configured such that when an accessory is mounted to the flange, a mounting force is applied directly to the plurality of mounting pins from the accessory.

It is an object of the invention to increase the degree of freedom in designing a power tool. A representative power tool has a spindle that transmits a driving force of a motor to a tool accessory, a tool accessory holding member that is configured to be movable in a direction of a spindle rotation axis direction between a holding position for holding the tool accessory and a releasing position for releasing the tool accessory, a lock mechanism that locks the tool accessory holding member in the holding position, and a body housing. The lock mechanism is disposed between a second end of the spindle and a wall of the body housing in the spindle rotation axis direction.