An electric working machine capable of efficiently cooling components disposed inside, as well as simplifying assembling work and reducing man-hours and production cost. A motor, control board for controlling the motor, rod fixture secured to the front side of the motor, and air guiding partitioning member secured to the rear side of the motor form a motor assembly. The air guiding partitioning member includes a partitioning plate hermetically partitioning between air exhaust and intake ports provided with a predetermined interval longitudinally in the body casing. The partitioning plate has an air guiding window for delivering cooling air taken in from the air intake port to an opening for sucking air on the front side of the motor through a space between the motor and body casing. The control board is disposed on the rear side of the partitioning plate.

A power tool includes an elongated shaft forming a handle constructed of a non-conductive material and a tool head located at one end of the handle. The tool head includes a working element and a driven shaft configured to drive the working element. A powerhead located at an opposite end of the handle and includes an input shaft. A driveshaft extends between the tool head and the powerhead. The driveshaft is rotatably coupled to the input shaft and the driven shaft to transfer torque from the powerhead to the working element of the tool head. At least a portion of the driveshaft extending between the powerhead and the working element is constructed of a non-conductive material to inhibit transmission of electricity from the working element to the powerhead.

A hand-held electrical power tool includes a working device for performing working function of the hand-held electrical power tool, a power device including a motor for driving the working device, a power supplying unit for supplying power to the power device, and an operating device through which a user can operate. The operating device includes an operating handle and a speed regulating device arranged beside the operating handle. The speed regulating device includes a speed regulating switch and a speed regulating operating member connected to the speed regulating switch and driving the speed regulating switch. When the rotating speed of the motor increases from zero to the maximum, the rotating angle of the speed regulating operating member is 0-360 degrees.

A powered device includes a powerhead unit and an attachment unit selectively attachable to and powered by the powerhead unit. The powerhead unit includes a motor, a first shaft segment having a first driveshaft segment coupled to the motor, and a first connecting portion attached to the first shaft segment. The attachment unit includes an operational unit configured to be driven by the motor, a second shaft segment having a second driveshaft segment coupled to the operational unit, and a second connecting portion attached to the second shaft segment for coupling to the first connecting portion. One of the first connecting portion and the second connecting portion defines an axial opening having a keyway and includes a button having a hook portion. The other of the first connecting portion and the second connecting portion defines a slot and includes a key.

Disclosed herein is a power tool that includes a direct current power source, motor, and motor controller. In some embodiments, the power source comprises a battery pack configured to supply current at a nominal voltage in excess of 100 VDC. Embodiments of the tool are configured to operate at a high power at least comparable to tools operating at lower voltages, and to produce noise levels in operation that are less than 65 decibels.

A control assembly for selectively controlling actuation of an electric motor arranged to power a hand-held power tool based on combined performance of two dissimilar operator actions and a hand-held power tool including such a control assembly. A switch member may be closed responsive to an enabling action including a first of the two dissimilar operator actions. A throttle control member becomes operable responsive to actuation of the throttle control member past a first movement threshold, i.e. a second dissimilar operator action, while the switch member is in the actuated state. The throttle control member remains repeatedly operable above a second movement threshold, even if the switch member is opened. Actuation of the throttle control member to below the second movement threshold will render the throttle control member non-operable until renewed combined performance of the first and second dissimilar operator actions.

A work tool and transmission system thereof. The transmission system comprises: a first shaft (250) and a second shaft (350), a near end (351) of the second shaft having a first mating part; a shaft coupler (600), a far-side part (620) of the shaft coupler having a second mating part matched in shape to the first mating part; and a coupling mechanism capable of directly or indirectly applying a coupling force to at least one of the first shaft, the second shaft and the shaft coupler; when the far-side part of the shaft coupler is aligned with the near end of the second shaft in the circumferential direction, the coupling force forces the first mating part to engage with the second mating part, so that the shaft coupler transmits rotational movement of the first shaft to the second shaft. The work tool comprises: a transmission system; a motive power head transmission-connected to the first shaft (250); and a working head transmission-connected to the second shaft (350).

An apparatus is disclosed that is connectable to a conventional chain saw to extend the operable reach of the chain saw. This apparatus includes a support assembly to provide support against a user's leg or body portion when cutting an elevated item. The apparatus helps to elevate and control a chain saw, while cutting or trimming objects with the chain saw. The apparatus includes operationally secure mounting means to firmly engage the handles of the chain saw, and to maintain the saw in proper operative alignment and position. The apparatus reliably and securely engages a chain saw handle without requiring modification of the original chain saw equipment. The apparatus provides a mounting assembly which does not engage or otherwise adversely contact fragile plastic parts of the chain saw, such as the engine housing. The apparatus provides an assembly for remotely operating a throttle or a trigger of the chain saw.

Provided is an electric power work device which includes: a body case; a work tool protruding forward from a front side with respect to the body case; a motor; and a battery supplying power to the motor. The motor is accommodated in the body case and the battery is detachably attached to a rear side with respect to the body case. A top handle is extended in a longitudinal direction at an upside with respect to the body case. The top handle includes, on an upper surface of a front part thereof, a thumb rest and a power switch. The power switch is arranged on a side in a lateral direction of the thumb rest.

A vegetation pruning device includes a pair of pivotably coupled handles and a motor having a rotary output drive for driving an endless flexible cutting chain. A guard is moved relative to the chain by pivoting of the handles relative to each other to grip vegetation between the guard and the chain. The motor is actuated by pressing each of a pair of elongate triggers at any position along the length of the triggers.