A string trimmer includes a handle unit including a handle unit housing that defines a grip portion and a battery receptacle. The string trimmer also includes a head unit including a head unit housing, an electric motor, and a rotatable trimmer head. The string trimmer further includes a shaft assembly coupling the handle unit to the head unit. The string trimmer also includes a circuit board assembly supported within the head unit housing. The circuit board assembly includes a heat sink and a circuit board that comprises a controller configured to control the electric motor.

A garden tool includes a cutting assembly, a first driving device and a height adjustment assembly. The first driving assembly includes a prime mover fixedly mounted on a tool body and a transmission mechanism that transmits power output by the prime mover to the cutting assembly. The transmission mechanism is used to transmit the power output by the prime mover to the cutting assembly to drive the cutting assembly to work. The height adjustment assembly is used to drive the cutting assembly to move in a direction perpendicular to a working plane, so as to adjust a distance of the cutting assembly from the ground. The garden tool of the disclosure directly adjusts a height of a mower from the ground through the height adjustment assembly without adjusting a position of a heavy motor.

A garden tool includes a cutting assembly, a first driving device and a height adjustment assembly. The first driving assembly includes a prime mover fixedly mounted on a tool body and a transmission mechanism that transmits power output by the prime mover to the cutting assembly. The transmission mechanism is used to transmit the power output by the prime mover to the cutting assembly to drive the cutting assembly to work. The height adjustment assembly is used to drive the cutting assembly to move in a direction perpendicular to a working plane, so as to adjust a distance of the cutting assembly from the ground. The garden tool of the disclosure directly adjusts a height of a mower from the ground through the height adjustment assembly without adjusting a position of a heavy motor.

A robotic garden tool having a deck, a blade, a motor, and a blade height adjustment mechanism. The blade is movably coupled to the deck. The motor is configured to move the blade about an axis of rotation, and the axis of rotation defines an axial direction. The blade height adjustment mechanism includes a manual actuator configured to move in response to manual actuation by an operator. The manual actuator is operably coupled to a cam interface. The cam interface is disposed within a cylindrical volume defined circumferentially by the cam interface and bounded axially by upper and lower distal ends of the cam interface. The axis of rotation of the blade intersects the cylindrical volume. The blade is configured to move at least partially in the axial direction in response to movement of the manual actuator.

A robotic garden tool having a deck, a blade, a motor, and a blade height adjustment mechanism. The blade is movably coupled to the deck. The motor is configured to move the blade about an axis of rotation, and the axis of rotation defines an axial direction. The blade height adjustment mechanism includes a manual actuator configured to move in response to manual actuation by an operator. The manual actuator is operably coupled to a cam interface. The cam interface is disposed within a cylindrical volume defined circumferentially by the cam interface and bounded axially by upper and lower distal ends of the cam interface. The axis of rotation of the blade intersects the cylindrical volume. The blade is configured to move at least partially in the axial direction in response to movement of the manual actuator.

A gang reel mower has a hybrid engine, generator and battery pack electric power system driving a pair of electric wheel motors for propelling the mower and for driving individual reel motors for powering a plurality of reel cutting units. A master controller is programmable with a selected clip and maintains the selected clip whether the mower travels straight ahead or is turning. The output power of the generator is damped and is gradually increased during high electrical loads to prevent step responses in the engine and thereby limit engine droop. During regenerative braking of the mower, the generator can be driven as a motor to use the engine as a load. This limits the voltage produced by the traction motors during regenerative braking from damaging the electrical system or overcharging the battery pack. Moreover, maximum transport and mowing ground speeds are automatically reduced during some turns of the mower.

A gang reel mower has a hybrid engine, generator and battery pack electric power system driving a pair of electric wheel motors for propelling the mower and for driving individual reel motors for powering a plurality of reel cutting units. A master controller is programmable with a selected clip and maintains the selected clip whether the mower travels straight ahead or is turning. The output power of the generator is damped and is gradually increased during high electrical loads to prevent step responses in the engine and thereby limit engine droop. During regenerative braking of the mower, the generator can be driven as a motor to use the engine as a load. This limits the voltage produced by the traction motors during regenerative braking from damaging the electrical system or overcharging the battery pack. Moreover, maximum transport and mowing ground speeds are automatically reduced during some turns of the mower.

A mowing cylinder cutter and a lawn care tool driven by a built-in outer rotor motor are provided. The cylinder cutter includes an outer rotor motor, blades and a reel. The blades are fixedly connected to the reel through support plates. At least one end of the reel is provided with the outer rotor motor. The outer rotor motor includes a stator assembly and an outer rotor. The stator assembly is connected to a frame through a connecting member, and the outer rotor is fixedly connected to the reel. The lawn care tool includes a working part, a main shaft, a motor shaft and an outer rotor motor. The motor shaft passes through the main shaft. One end of the main shaft is connected to the motor shaft through a bearing assembly. The outer rotor motor is located in the main shaft.

A horizontal shaft electric powerhead includes an electric motor, a battery, a housing, and a base plate. The electric motor includes a horizontal output shaft configured to rotate about a horizontal axis of rotation and has a power rating of 2,500 or fewer watts. The battery includes a plurality of lithium-ion battery cells and is coupled to the electric motor. The housing has a standard cross-sectional footprint so that the electric powerhead has substantially the same volume as a comparable small internal combustion engine. The base plate is configured to be fastened to a mounting surface and includes a plurality of openings arranged in a standard horizontal shaft engine support pattern.

The disclosure provides a string trimmer. The string trimmer includes a protective shield, a first motor, a blade and a fan. The first motor is arranged on one side of the protective shield, and a first rotation shaft of the first motor penetrates the protective shield to the other side of the protective shield. The blade is arranged on the other side of the protective shield, and the blade is connected with the first rotation shaft. The fan is arranged on the same side as the first motor, and the fan is mounted on the protective shield through a second rotation shaft. Wherein, a rotation speed ratio between the second rotation shaft and the first rotation shaft ranges from 0.5 to 4. With the string trimmer of the disclosure, the rotation speed of the blade and the fan are different.