A cutter blade for a mower is disposed inside a housing of the mower and rotatably driven about a vertical axis. The cutter blade includes a blade body a blade portion provided at least at a part of a rotational direction-wise front end portion of the blade body, and a wind generating portion provided at least at a part of a rotational direction-wise rear end portion of the blade body, the wind generating portion extending more upwards than the blade portion. A thickness of the wind generating portion at the rotational direction-wise rear end portion is smaller at least partially than a thickness of the remaining part of the wind generating portion.

A high-efficiency blade for a lawn maintenance tool includes a central axis and a mounting portion located on the central axis. The high-efficiency blade includes a cutting blade and a cutting blade sharpened leading edge. A cleaning blade is vertically offset from the cutting blade and is configured to mulch the associated clippings from vegetation and reduce an associated accumulation of clippings on an underside of an associated mower deck. The lawn maintenance tool can also include a deck having a separation distance between the cleaning blade and an underside of the deck. The deck can include an elevation change to vary the separation distance. The deck and high-efficiency blade can also include a forward or rearward tilt.

A high-efficiency blade for a lawn maintenance tool includes a central axis and a mounting portion located on the central axis. The high-efficiency blade includes a cutting blade and a cutting blade sharpened leading edge. A cleaning blade is vertically offset from the cutting blade and is configured to mulch the associated clippings from vegetation and reduce an associated accumulation of clippings on an underside of an associated mower deck. The lawn maintenance tool can also include a deck having a separation distance between the cleaning blade and an underside of the deck. The deck can include an elevation change to vary the separation distance. The deck and high-efficiency blade can also include a forward or rearward tilt.

A lawn mower (10) includes a rotating shaft (16) that is connected to a lawn mowing motor (17) and extends in a substantially vertical direction; a blade (15) that rotates integrally with the rotating shaft (16); and a housing (18) that rotatably accommodates the blade (15) and has an open bottom. The housing (18) is provided with a grindstone (32) capable of coming into contact with the blade (15) from below the blade (15), and the grindstone (32) is capable of moving between a maintenance position where the grindstone is capable of coining into contact with the blade (15) and a standby position where the grindstone is not capable of coming into contact with the blade (15).

A mowing disc for rotary mowers is provided, which has a mowing plate with a central drive region and an upper casing surface. The mowing plate is equipped with mower blades at its periphery. The mowing disc further includes a wear protection device consists of a single-component or multi-component protective cover which can be fastened on the upper casing surface.

A grounding body may be mounted on a cutting blade shaft of a grass cutter. The grounding body may include a mounting part for mounting the grounding body on the cutting blade shaft, wherein a cutting blade is mounted on the cutting blade shaft to be positioned above the grounding body; and a main body coupled to the mounting part and configured to contact a ground. The main body may include a first main body constituted of a first resin; and a second main body constituted of a second resin different from the first resin.

One aspect of the present disclosure provides an electric working machine. The electric working machine includes a driver, a motor, and a control circuit. Attached to the driver is a selected tool. The motor drives the selected tool attached to the driver. The control circuit sets a target rotational frequency based on the selected tool. The control circuit controls the motor to rotate at the target rotational frequency.

One aspect of the present disclosure provides an electric working machine. The electric working machine includes a driver, a motor, and a control circuit. Attached to the driver is a selected tool. The motor drives the selected tool attached to the driver. The control circuit sets a target rotational frequency based on the selected tool. The control circuit controls the motor to rotate at the target rotational frequency.

A lawn mower includes a blade, a motor connected to the blade, and a housing storing the blade in the housing and is configured to mow grass underneath the housing. The lawn mower includes a grass container to contain the mowed grass and a connecting member that connects the housing to the grass container. The housing is provided with a ceiling opening communicating with a flow path inside the connecting member. The ceiling opening overlaps with a region corresponding to a rotation range, of the blade, projected upward along a drive shaft.

A lawn mower includes a blade, a motor connected to the blade, and a housing storing the blade in the housing and is configured to mow grass underneath the housing. The lawn mower includes a grass container to contain the mowed grass and a connecting member that connects the housing to the grass container. The housing is provided with a ceiling opening communicating with a flow path inside the connecting member. The ceiling opening overlaps with a region corresponding to a rotation range, of the blade, projected upward along a drive shaft.