The preferred embodiment of a rotary hand tool attachment is intended for coupling to a rotary power hand tool of the type that has a housing with a substantially cylindrical nose portion and a motor having an output shaft with a mounting coupling for receiving a drive shaft extending forwardly therefrom. The attachment includes a housing having an output shaft configured to drive a rotating tool, and an input shaft configured to couple with the drive shaft so that the motor output shaft, drive shaft and input shaft are aligned on a common axis. The housing also includes a mounting collar with a substantially cylindrical inside surface that is sized to slidably and snugly engage the nose portion. Additionally, a thin annular cylindrical layer of resilient material is disposed between the cylindrical inside surface of the housing and the nose portion.
In order to provide an effective technique in simplifying the vibration-proof structure of a handle equipped in a rotary power tool, a representative rotary power tool 101 is provided with a tool body 103, a rotary-disk shaped tool bit 115, a handle 109, a pivot region 121 and an elastic element 129. The handle 109 coupled to the tool body 103 is disposed in a predetermined initial position in which the handle 109 longitudinally extends parallel to the longitudinal direction of the tool body 103. The handle 109 can rotate with respect to the tool body 103 around the pivot region 121 in any direction crossing the longitudinal direction of the tool body 103. The elastic element 129 is disposed between the tool body 103 and the handle 109 to apply a biasing force to the handle 109 such that the elastic element 129 biases the handle 109 to return to the initial position.
An angle drive attachment having an adjustable handle is provided. The angle drive includes an input shaft, an input shaft housing, a transmission, a handle mount, a handle, and an output socket. The handle allows the angle drive attachment to be adaptable to working environments having limited space or odd configurations. The input shaft rotates about the input axis of rotation and carried by the input shaft housing and drives the transmission. The output socket is connected to the transmission and rotates about an output axis of rotation and connects to a working bit. The handle mount mounts the handle to the input shaft housing. The handle, in cooperation with the handle mount, may be rotated about the input shaft housing, angled relative to the input shaft housing, and positioned axially linear along the input shaft housing.
Embodiments of an accessory attachment for a rotary power hand tool are disclosed wherein the hand tool is of the type which has a tool housing with a preferably cylindrical nose portion, a motor having a motor drive shaft with a mounting coupling extending forwardly from the nose portion for receiving a drive shaft, the attachment comprising a housing having a first end portion configured to be mounted to the tool housing nose portion and an input shaft for coupling to the motor drive shaft, and having an enlarged second end portion oriented at a right angle relative to the first end portion and also having an output shaft coupled to the input shaft at a right angle relative thereto, a rotary cutting wheel mounted to the output shaft and substantially disposed within said enlarged second end portion, excepting an exposed portion of the rotary cutting wheel for engaging a work surface, an adjustable guide foot pivotally connected to the enlarged second end portion and having a front surface configured to abut the work surface, the guide foot being configured to permit the wheel to extend beyond the front surface, where a position of the guide foot limits a depth of cut of the wheel into the work surface.
