A chainsaw includes a main machine, a battery pack, and a connection assembly. The battery pack is configured to supply energy to the main machine. Moreover, the battery pack and the main machine are separated from each other. The connection assembly is configured to connect the main machine and the battery pack so that the battery pack is electrically connected to the main machine. The main machine includes a chain, a guide plate, a motor, and a housing. The chain is configured to perform a cutting function. The guide plate is configured to support the chain. The motor is configured to drive the chain to move. The housing is configured to accommodate at least part of the motor. The connection assembly is detachably connected to the main machine or the battery pack.

A handheld portable cutting apparatus has a cutter unit with a cutter unit longitudinal axis. In a central housing section of the cutting apparatus, a drive connection is arranged between an electric drive motor and the cutter unit, wherein a motor housing having a motor housing longitudinal axis extends from the central housing section. A handle extends from the central housing section in a handle longitudinal axis. The cutter unit includes a guide bar with a saw chain circulating thereon, wherein, in a side view onto the cutting apparatus, the point of intersection between the handle longitudinal axis and the motor housing longitudinal axis and also the point of intersection between the handle longitudinal axis and the cutter unit longitudinal axis lie in the central housing section.

A chainsaw includes a handle with a handgrip; an electric motor for endlessly moving a saw chain; a control unit for controlling rotation of the motor; and a main power switch switchable between an ON state and an OFF state. The handgrip is provided with a gripping detection device for detecting whether the handgrip is gripped by the worker, and the chainsaw is configured to, when the control unit is manipulated to deactivate the electric motor in a state in which the gripping detection device detects that the handgrip is gripped, maintain the main power switch in the ON state, and to, when the control unit is manipulated to deactivate the electric motor in a state in which the gripping detection device detects that the handgrip is not gripped, switch the main power switch to the OFF state.

The present disclosure relates to a tree harvesting machine (120) having a crane arm (118), wherein the crane arm (118) comprises a tree harvesting head (100; 200) arranged at a free end of the crane arm (118). The tree harvesting head (100) comprises a saw (104) and at least two feed wheels (102). The tree harvesting head (100) further comprises an electric motor (106a) arranged to drive the saw (104), and at least one electric motor (106b) arranged to drive the feed wheels (102). The present disclosure also relates to associated tree harvesting monitoring systems, tree harvesting heads, methods and computer programs.

An outdoor tool includes a powerhead, a tool unit powered by the powerhead, and a shaft assembly extending between the powerhead and the tool unit. The tool unit includes a transmission housing, a support plate, a guide bar adjustably supported by the support plate, a drive gear, and a chain circumscribing a portion of the drive gear and a portion of the guide bar, the drive gear operatively coupled to the powerhead. The tool unit further includes a tension adjustment mechanism for adjusting a position of the guide bar relative to the drive gear to increase and decrease a tension in the chain. The tension adjustment mechanism includes an adjustment screw, a threaded adjustment bolt, at least one adjustment gear, and a member coupled to the adjustment bolt and the guide bar. Rotation of the adjustment screw causes translation of the guide bar relative to the drive gear.

An electric tool (20) allowing an external battery pack (26) to detachably connect thereto is disclosed. The electric tool (20) includes a housing and a motor (22) installed in the housing, and in addition the electric tool (20) includes a supporting part fixedly coupled to the housing; and a terminal holder (38). The terminal holder (38) is adapted to contact with terminals on an external battery pack (26) in order to form a consistent electrical connection. The terminal holder (38) is confined by the supporting member (56,58) and in the meantime adapted to move relative to the supporting part. The terminal holder (38) has a hollow shape and is adapted to contact with the support member (56,58) at an exterior surface of the terminal holder (38). As the terminal holder (38) is tightly fitted with the battery pack (26) but at the same time loosely fitted with the tool housing, chances of generating sparks or electric arc between the metal terminals can be minimized.

An electric tool (20) allowing an external battery pack (26) to detachably connect thereto is disclosed. The electric tool (20) includes a housing and a motor (22) installed in the housing, and in addition the electric tool (20) includes a supporting part fixedly coupled to the housing; and a terminal holder (38). The terminal holder (38) is adapted to contact with terminals on an external battery pack (26) in order to form a consistent electrical connection. The terminal holder (38) is confined by the supporting member (56,58) and in the meantime adapted to move relative to the supporting part. The terminal holder (38) has a hollow shape and is adapted to contact with the support member (56,58) at an exterior surface of the terminal holder (38). As the terminal holder (38) is tightly fitted with the battery pack (26) but at the same time loosely fitted with the tool housing, chances of generating sparks or electric arc between the metal terminals can be minimized.

A chainsaw includes a main machine, a battery pack, and a connection assembly. The battery pack is configured to supply energy to the main machine. Moreover, the battery pack and the main machine are separated from each other. The connection assembly is configured to connect the main machine and the battery pack so that the battery pack is electrically connected to the main machine. The main machine includes a chain, a guide plate, a motor, and a housing. The chain is configured to perform a cutting function. The guide plate is configured to support the chain. The motor is configured to drive the chain to move. The housing is configured to accommodate at least part of the motor. The connection assembly is detachably connected to the main machine or the battery pack.

The disclosure provides a power tool, a detection circuit and a detection method of a load state thereof. The detection circuit of the power tool includes: a main control unit, a sampling resistor, a voltage sampling unit and an alarm display unit. The sampling resistor is arranged on a driving loop of a motor. The voltage sampling unit is used to sample a voltage across the sampling resistor. The alarm display unit is connected with the main control unit. The main control unit is configured to control the alarm display unit to execute a preset display state according to a voltage signal across the sampling resistor sampled by the voltage sampling unit.

A handheld portable cutting apparatus has a cutter unit with a cutter unit longitudinal axis. In a central housing section of the cutting apparatus, a drive connection is arranged between an electric drive motor and the cutter unit, wherein a motor housing having a motor housing longitudinal axis extends from the central housing section. A handle extends from the central housing section in a handle longitudinal axis. The cutter unit includes a guide bar with a saw chain circulating thereon, wherein, in a side view onto the cutting apparatus, the point of intersection between the handle longitudinal axis and the motor housing longitudinal axis and also the point of intersection between the handle longitudinal axis and the cutter unit longitudinal axis lie in the central housing section.