Provided is a portable brush cutter with reduced weight and size due to its simple structure with a small number of components that is capable of improving durability and the like as well as effectively suppressing torsional vibration of a transmission shaft. In the portable brush cutter, a one-way clutch to prevent generation of torsional vibration in a rotation transmission path is interposed between an output shaft and a transmission shaft, and bearings are adjacently mounted on the opposite sides of the one-way clutch.

An electric working machine includes an attachment portion, a motor, and a controller. Multiple types of tip tools are alternatively attached to the attachment portion. The motor drives the tip tool attached to the attachment portion. The controller has first start control and second start control. The controller is configured to execute the first start control so as to determine the type of the tip tool when not having tool type information, and configured to execute the second start control when having the tool type information.

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 backpack system for use with a power tool, the system including a harness system configured to extend at least over a user's shoulders, and a carrier portion configured to be coupled to the harness system. At least one battery pack is housed within the carrier portion, and at least one electrical connector is coupled to the at least one battery pack, with the at least one battery pack being configured to provide power to the power tool. The carrier portion may further include at least one opening formed therein to allow the passage of air at least partially through the carrier portion. The power tool may be a string trimmer or a blower. Additionally, one or more carrier portions may be recharged in a recharging station which is configured to allow for hands-free connection of a carrier portion to a user's harness system.

A rotary head for brush cutters with a lower shell on which cutting means and a ring nut are hinged, the latter being coupled to the lower shell and movable in relation to the lower shell from a first working configuration to a second blade-change working configuration, and vice versa; the rotary head having positioning means for interference fitting said ring nut in a predetermined angular position relative to said lower shell.

A rotary head for brush cutters with a lower shell on which cutting means and a ring nut are hinged, the latter being coupled to the lower shell and movable in relation to the lower shell from a first working configuration to a second blade-change working configuration, and vice versa; the rotary head having positioning means for interference fitting said ring nut in a predetermined angular position relative to said lower shell.

A garden tool includes a power assembly and a handle assembly. The handle assembly has a start key electrically connected with the power assembly and a cover capable of at least partially shielding the start key. The cover is configured to be moved from a closed position to an opened position under driving of external force so as to operate the start key. A reset member is located between the cover and the handle assembly, the reset member being capable of driving the cover to the closed position.

A garden tool includes a connecting rod assembly, a working head, a power source, a first rod connected to the working head, a second rod connected to the power source, and a connection structure for mechanical and electrical connection between the first and second rods. A first terminal is arranged on the first rod and a second terminal arranged on the second rod, the first terminal being connected to a first wire, the second terminal being connected to a second wire, the first terminal and the second terminal connectable to transmit power of the power source to the working head through the first wire and the second wire. A second base is mounted in the second rod, the second base including at least two jacks independent of each other. At least two second terminals are respectively mounted in respective jacks.

A garden tool includes a connecting rod assembly, a working head, a power source, a first rod connected to the working head, a second rod connected to the power source, and a connection structure for mechanical and electrical connection between the first and second rods. A first terminal is arranged on the first rod and a second terminal arranged on the second rod, the first terminal being connected to a first wire, the second terminal being connected to a second wire, the first terminal and the second terminal connectable to transmit power of the power source to the working head through the first wire and the second wire. A second base is mounted in the second rod, the second base including at least two jacks independent of each other. At least two second terminals are respectively mounted in respective jacks.