An electric lawnmower control system can include a battery, an electric motor configured to rotatably drive a blade, a fan rotatably driven by the electric motor, a printed circuit board, a motor controller, and a housing. The printed circuit board can be fastened to the battery and include a heat sink that is located adjacent to the fan. The motor controller can be mounted on the circuit board, in electrical communication with the battery and the electric motor, thermally coupled to the heat sink, and configured selectively drive the electric motor with electric power supplied by the battery. The housing can include a first side, a second side, and a ventilation passage extending from the first side to the second side. The ventilation passage can be in fluid communication with the fan, and at least a portion of the heat sink is exposed to air flowing through the ventilation passage.

A battery management system for a lawnmower that can include a first switch configured to issue a wake-up signal in response to a wake-up input, issue a battery status request signal in response to a battery status input, and issue a shut-down signal in response to a shut-down input. A first controller can be configured to, switch the second switch to an ON state to electrically connect the battery to the electrically powered device when the first controller receives the wake-up signal, cause the display to display information indicative of a status of the battery when the first controller receives the battery status request signal, and switch the second switch to an OFF state to terminate output from the battery to the electrically powered device when the first controller receives the shut-down signal.

A low impact turf wheel for significantly reducing the adverse effects of frequent travel over turf by a lawn mower includes a wheel rim having an inner and outer surface, a hub arranged within the wheel rim, wherein the hub includes a central portion for mounting the turf wheel, and a plurality of spaced apart stems extending perpendicularly outward from the outer surface of the wheel rim. The stem includes a stem surface extending perpendicularly to the stem and a lug extending radially outward from the stem surface. The lug includes a lug face parallel to the stem surface, wherein the combination of the stem surface and lug face provide a ground contacting tread.

A mower including a handle assembly, a grip moveable relative to the handle assembly, a sensor operable to generate an output signal based on a position of the grip relative to the handle assembly, a drive assembly, and a controller coupled to the sensor and the drive assembly. The controller receives the output signal and controls the drive assembly according to the output signal.

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 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 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).

The present invention is directed to a battery powered mower with a low profile design that minimizes the height of the mower to make the mower easier to operate and store. The low profile design places the cutting blade motor in the center of the deck volute so that it doesn't extend above the volute. Additionally, the batteries do not include a cover and so holes are located within the housing to drain away any water that collects. The invention also covers a simplified manufacturing process for the terminal blocks for the battery and a rear door. Lastly, the invention includes a cable guide to prevent the electrical cable from pinching when the handle is folded for storage.

A turf maintenance apparatus having folding handles facilitating compact storage is presented herein. The folding handles can be compressed or extended to adjust overall length and can rotate between an extended operator position and a folded storage position. Depending on implementation, the folding handles can be locked in the folded storage position and can also lock in the extended operator position. One or more operator presence devices can disable operation of a motor or engine when deactivated. A first operator presence device can deactivate operation of the motor or engine when the folding handles are not locked in the extended operator position, and a second operator presence device can deactivate operation of the motor or engine absent an operator maintaining activation of the second operator presence device.

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.