A walk-behind, self-propelled machine includes a clutch having a driving state where a motor drives wheels to rotate and an unlocked state where the wheels freely rotate relative to the motor. The clutch includes a movable member and a driving member. The movable member is capable of moving between a locked position where the clutch is in the driving state and an unlocked position where the clutch is in the unlocked state. The driving member transfers power to the wheels by means of friction. When the clutch is in the driving state, the motor drives the wheels to rotate in a first direction, when the motor stops rotating, the wheels rotate in a second direction opposite to the first direction and can drive the driving member to move by frictional force so that the driving member pushes the movable member to move from the locked position to the unlocked position, and after the motor (40) is turned off, the wheels rotate without driving a motor shaft to rotate, so that a relatively small force can push or pull the walk-behind, self-propelled machine.

A cutting tool includes: an electric motor with a stator having multiple windings and a rotor; a driver circuit electrically connected to the electric motor to drive the electric motor to run; and a controller configured to estimate the angular position of the rotor based on a working parameter of the electric motor and output a drive signal to the driver circuit based on the angular position of the rotor to control the rotation of the electric motor. At a start stage, the controller is configured to: when an abnormal start of the electric motor is detected, output a first control instruction to control the electric motor to restart, where the first control instruction includes at least the instruction to input a high-frequency signal into the driver circuit so as to acquire the angular position of the rotor.

An electric starting system for an internal combustion engine is provided. The starting system includes a rechargeable battery, a battery receiver, and a starter motor. The rechargeable battery including a battery housing, internal circuitry housed within the battery housing, two voltage output terminals, and an enable terminal. The battery receiver includes a battery receptacle configured to receive the rechargeable battery, two voltage output terminals, and the enable terminal. The starter motor is configured to start the internal combustion engine. The internal circuitry is coupled to the enable terminal and configured to enable and disable an internal switch to provide power to one of the two voltage output terminals, the internal circuitry monitoring at least one internal condition of the rechargeable battery for a fault condition. The internal circuitry disables the internal switch upon detection of the fault condition.

Apparatus and methodology for lawn mower security systems provide the ability to safeguard ride-on style lawn mowers against unauthorized cranking of its engine if the mowers have push/pull mower deck or power-takeoff (PTO) switch technology. Security components secured to a PTO or mower deck switch to prevent the ability to position such switch in a disengaged position. Therefore, existing safety and interlock features of the existing ride-on mower otherwise prevent someone from being able to crank the mower, which helps to guard against unauthorized use and/or theft of the equipment.

A garden tool includes an upper push rod, a lower push rod and a control mechanism connected to the upper push rod and the lower push rod. The control mechanism includes a safety switch, an expansion-retraction locking assembly and an operation handle, a trigger configured to trigger the safety switch. The expansion-retraction locking assembly includes a limiting member capable of being operated to enter between the upper push rod and the lower push rod to limit an expansion and retraction of the upper push rod relative to the lower push rod, and a stopping member for holding the limiting member in the limiting state. The operating handle is configured to rotate around a pivot shaft between a first position and a second position. The trigger member and the stopping member are connected to the pivot shaft and driven by the operating handle.

An internal combustion engine includes an engine block, a crankshaft configured to rotate about a crankshaft axis, a flywheel coupled to the crankshaft and positioned above the engine block, an outer housing positioned above the engine block and the flywheel, and an electric starting system. The electric starting system includes an electric motor and an energy storage device positioned above the flywheel and below the outer housing. The energy storage device is electrically coupled to the electric motor to power the electric motor. When the electric starting system is configured to rotate the crankshaft to start the engine when the electric starting system is activated.

A starter battery system for an air cooled engine rated at less than 50 horsepower. The system includes four lithium iron phosphate cells and a charging circuit configured to be powered by rotation of an air cooled engine. A voltage developed by the charging circuit is applied to the four lithium iron phosphate cells without battery management circuitry provided between the charging circuitry and the four lithium iron phosphate cells. An engine which includes at least one piston, a rotatable crankshaft coupled to the at least one piston, a starter motor configured to selectively initiate rotation of the crankshaft, a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having at least one cell, and a charging system configured to be powered by motion of at least one component of the engine. The charging system is configured to continuously apply a voltage potential to the at least one cell while the engine is in a running condition. An engine including at least one piston, a rotatable crankshaft coupled to the at least one piston, a starter motor configured to selectively initiate rotation of the crankshaft, a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having four lithium iron phosphate cells, and a charging system configured to be powered by the engine. The charging system is electrically coupled to the lithium-ion battery and configured to charge the lithium-ion battery and no battery management circuitry is provided between the charging system and the lithium-ion battery.

A control panel, a self-propelled switch apparatus, and a power device (13). The control panel comprises a push rod (1) connected to a machine body and a panel assembly (2) reciprocatingly sliding on the push rod. The control panel further comprises lock assemblies (41, 42) connected to the panel assembly. The lock assemblies (41, 42) are adapted to lock the panel assembly on the push rod and unlock the control panel and the push rod, so that a device in which the control panel is disposed can be switched between a manual-power driving mode and a self-propelled driving mode. By means of the solution, a garden tool can walk in a self-propelled manner, and can also be pushed to walk.

A walk-behind, self-propelled machine includes a clutch having a driving state where a motor drives wheels to rotate and an unlocked state where the wheels freely rotate relative to the motor. The clutch includes a movable member and a driving member. The movable member is capable of moving between a locked position where the clutch is in the driving state and an unlocked position where the clutch is in the unlocked state. The driving member transfers power to the wheels by means of friction. When the clutch is in the driving state, the motor drives the wheels to rotate in a first direction, when the motor stops rotating, the wheels rotate in a second direction opposite to the first direction and can drive the driving member to move by frictional force so that the driving member pushes the movable member to move from the locked position to the unlocked position, and after the motor (40) is turned off, the wheels rotate without driving a motor shaft to rotate, so that a relatively small force can push or pull the walk-behind, self-propelled machine.

An electric work vehicle includes a carrier provided separately from a vehicle body for mounting/dismounting a battery, a carrier storage section provided in the vehicle body for attaching the carrier to the vehicle body, and an attachment mechanism for attaching/detaching the carrier to/from the carrier storage section.