A working machine may include a pipe, a body unit, a tool unit, a shaft, and a speed increaser. The body unit may be disposed at a rear end of the pipe and include a prime mover. The tool unit may be disposed at a front end of the pipe and include a front tool. The shaft may be disposed inside the pipe and be configured to transmit power of the prime mover to the front tool. The speed increaser may be disposed between the shaft and the front tool. The speed increaser may be configured to make a rotational speed of the front tool higher than a rotational speed of the shaft.

A method operates a hand-guided processing device having a user-activated operating sensor device with a plurality of different detection positions. The method involves the steps: a) detecting a sequence of activations of the operating sensor device at different detection positions of the plurality of detection positions, and b) when the detected sequence corresponds to a given sequence, calibrating the operating sensor device for at least one detection position of the plurality of detection positions based on at least one of the activations of the detected activations.

A power tool includes a motor, a speed reducer and a speed-reducing-ratio change mechanism. The speed reducer includes planetary gear mechanisms arranged in multiple stages. The speed-reducing-ratio change mechanism is configured to change a speed reducing ratio of the speed reducer in response to a change of a rotating direction of a motor shaft. At least two stages of the planetary gear mechanisms are configured such that an internal gear in each stage selectively functions as a fixed element. The speed-reducing-ratio change mechanism includes a one-way clutch and a lock mechanism configured to non-rotatably lock the internal gears of the at least two stages when the one-way clutch does not transmit rotation, and to rotate the internal gears of the at least two stages when the one-way clutch transmits rotation. The at least two stages include a speed-increasing planetary gear mechanism and a speed-reducing planetary gear mechanism.

A power tool includes a motor, a speed reducer and a speed-reducing-ratio change mechanism. The speed reducer includes planetary gear mechanisms arranged in multiple stages. The speed-reducing-ratio change mechanism is configured to change a speed reducing ratio of the speed reducer in response to a change of a rotating direction of a motor shaft. At least two stages of the planetary gear mechanisms are configured such that an internal gear in each stage selectively functions as a fixed element. The speed-reducing-ratio change mechanism includes a one-way clutch and a lock mechanism configured to non-rotatably lock the internal gears of the at least two stages when the one-way clutch does not transmit rotation, and to rotate the internal gears of the at least two stages when the one-way clutch transmits rotation. The at least two stages include a speed-increasing planetary gear mechanism and a speed-reducing planetary gear mechanism.

A handheld garden tool includes a housing, a control member, and a battery pack. The housing extends in the front and rear direction and is formed with an accommodation space. The control member is at least partially disposed in the accommodation space. The battery pack is detachably connected to the housing. In a projection plane perpendicular to the left and right direction, the projection of the control member in the projection plane in the left and right direction is a first projection, and the projection of the battery pack in the projection plane in the left and right direction is a second projection. The first projection at least partially overlaps the second projection.

A handheld garden tool includes a housing, a control member, and a battery pack. The housing extends in the front and rear direction and is formed with an accommodation space. The control member is at least partially disposed in the accommodation space. The battery pack is detachably connected to the housing. In a projection plane perpendicular to the left and right direction, the projection of the control member in the projection plane in the left and right direction is a first projection, and the projection of the battery pack in the projection plane in the left and right direction is a second projection. The first projection at least partially overlaps the second projection.

A method of refurbishing a handheld landscape power tool includes separating an original motor of the power tool from a tool head of the power tool. The tool head includes a tool shaft extending proximate to the original motor. A replacement power head and a shaft coupler are provided. The replacement power head includes a motor and a power shaft mechanically coupled to the motor. The shaft coupler includes a power shaft connecter coupled to a shaft-specific connecter. The replacement power head is coupled to the shaft coupler by connecting the power shaft connecter to the power shaft of the replacement power head. The tool head is coupled to the shaft coupler by connecting the shaft-specific connecter to the tool shaft of the tool head.

A trimming machine capable of releasing cutting edges from branches or the like, by reversing motor rotation without requiring additional operation (with normal operation) by a user, such as operating a forward-reverse switching lever, when blades are locked. The trimming machine includes: an electric motor; a blade drive gear rotationally driven by the electric motor; an eccentric cam provided in the gear; a pair of blades relatively slidably facing and contacting each other, which are reciprocated, by the eccentric cam, in relatively opposite directions along a longitudinal direction of the blades, thereby grinding cutting edges provided in a protruding manner with gaps therebetween in the pair of blades against each other; a trigger lever for driving the blades; and a control circuit (controller) that controls a rotational driving of the electric motor based on input from the trigger lever and switches a rotational direction of the electric motor at each time of the input from the trigger lever.

A trimming machine capable of releasing cutting edges from branches or the like, by reversing motor rotation without requiring additional operation (with normal operation) by a user, such as operating a forward-reverse switching lever, when blades are locked. The trimming machine includes: an electric motor; a blade drive gear rotationally driven by the electric motor; an eccentric cam provided in the gear; a pair of blades relatively slidably facing and contacting each other, which are reciprocated, by the eccentric cam, in relatively opposite directions along a longitudinal direction of the blades, thereby grinding cutting edges provided in a protruding manner with gaps therebetween in the pair of blades against each other; a trigger lever for driving the blades; and a control circuit (controller) that controls a rotational driving of the electric motor based on input from the trigger lever and switches a rotational direction of the electric motor at each time of the input from the trigger lever.

A trimming machine capable of suppressing damage to a gear when blades are locked, with a simple structure without increasing weight and cost. The trimming machine includes: an electric motor; a blade drive gear rotationally driven by the electric motor; an eccentric cam provided in the gear; and a pair of blades relatively slidably facing and contacting each other, in which the eccentric cam is adapted to reciprocate the pair of blades in relatively opposite directions along the longitudinal direction of the blades, thereby grinding cutting edges against each other, the cutting edges provided in a protruding manner with gaps therebetween in the pair of blades, and a shock absorbing portion is provided between a connecting portion connected to the eccentric cam and the cutting edges in each of the blades.