A power tool and method of detecting impacts of a power tool that includes a motor driving a hammer to impact an anvil. A motor control unit is configured to determine a motor characteristic indicative of a speed of the motor. When the motor characteristic indicates that the speed of the motor is below a speed threshold, the motor control unit employs an acceleration-based technique to detect a first impact based on a change in motor acceleration and generate a first impact indication in response to detecting the first impact. When the motor characteristic indicates that the speed is above the speed threshold, the motor control unit employs a time-based technique to detect a second impact based on an elapsed time and generates a second impact indication in response to detecting the second impact.

A power tool and method of detecting impacts of a power tool that includes a motor driving a hammer to impact an anvil. A motor control unit is configured to determine a motor characteristic indicative of a speed of the motor. When the motor characteristic indicates that the speed of the motor is below a speed threshold, the motor control unit employs an acceleration-based technique to detect a first impact based on a change in motor acceleration and generate a first impact indication in response to detecting the first impact. When the motor characteristic indicates that the speed is above the speed threshold, the motor control unit employs a time-based technique to detect a second impact based on an elapsed time and generates a second impact indication in response to detecting the second impact.

A power tool and method of detecting impacts of a power tool that includes a motor driving a hammer to impact an anvil. A motor control unit is configured to determine a motor characteristic indicative of a speed of the motor. When the motor characteristic indicates that the speed of the motor is below a speed threshold, the motor control unit employs an acceleration-based technique to detect a first impact based on a change in motor acceleration and generate a first impact indication in response to detecting the first impact. When the motor characteristic indicates that the speed is above the speed threshold, the motor control unit employs a time-based technique to detect a second impact based on an elapsed time and generates a second impact indication in response to detecting the second impact.

A power tool and method of detecting impacts of a power tool that includes a motor driving a hammer to impact an anvil. A motor control unit is configured to determine a motor characteristic indicative of a speed of the motor. When the motor characteristic indicates that the speed of the motor is below a speed threshold, the motor control unit employs an acceleration-based technique to detect a first impact based on a change in motor acceleration and generate a first impact indication in response to detecting the first impact. When the motor characteristic indicates that the speed is above the speed threshold, the motor control unit employs a time-based technique to detect a second impact based on an elapsed time and generates a second impact indication in response to detecting the second impact.

A working machine includes a working part; a motor configured to drive the working part; a motor housing covering at least a part of the motor; an outer housing covering at least a part of the motor and at least a part of the motor housing; and a light emitter disposed at a part of the motor housing that is covered by the outer housing. The outer housing includes an opening at a part of the outer housing that faces the light emitter. The opening allows light emitted from the light emitter to pass through the opening.

A power tool is arranged to operate in at least a first operating mode and a second operating mode. The power tool is operative to provide a first type of light signal from a light emitting device arranged to light up an object to be processed when the power tool is set in the first operating mode and to provide a second type of light signal when the power tool is set in the second operating mode.

A power tool includes a housing, a motor, a power output member, a transmission assembly, and a light source device. The power output member extends substantially along an axis and is connected to an operating accessory, and the operating accessory is provided with a working portion. The light source device includes a light guide plate, a light-emitting element, and a circuit board. The light guide plate is formed with a light exit surface for emitting light and a first light incident surface and a second light incident surface for guiding light into the light guide plate. The circuit board is used for installing the light-emitting element. A maximum distance L between the first light incident surface and the second light incident surface along a left-and-right direction is greater than or equal to 0 mm and less than or equal to 7 mm.

A power tool includes a housing, a motor, a power output member, a transmission assembly, and a light source device. The power output member extends substantially along an axis and is connected to an operating accessory, and the operating accessory is provided with a working portion. The light source device includes a light guide plate, a light-emitting element, and a circuit board. The light guide plate is formed with a light exit surface for emitting light and a first light incident surface and a second light incident surface for guiding light into the light guide plate. The circuit board is used for installing the light-emitting element. A maximum distance L between the first light incident surface and the second light incident surface along a left-and-right direction is greater than or equal to 0 mm and less than or equal to 7 mm.

In a working device, a cover added outside an enclosure portion is used to utilize vibration of the working device during an operation thereof to cool the enclosure portion. The working device has: a motor; a speed reduction mechanism for decelerating rotation of the motor; a striking mechanism; an enclosure portion (main body housing, hammer case 5) accommodating them; and a cover covering at least a portion of an outer surface of the enclosure portion. An airflow passage is formed between an outer surface of the hammer case and the cover and is configured so as to allow inflow and outflow of outside air. The cover is held so as to be slightly movable by sandwiching an elastic member in an axial line direction and, by the cover being moving forward and backward during its operation, air goes into or comes out of the airflow passage to cool the hammer case.

In a working device, a cover added outside an enclosure portion is used to utilize vibration of the working device during an operation thereof to cool the enclosure portion. The working device has: a motor; a speed reduction mechanism for decelerating rotation of the motor; a striking mechanism; an enclosure portion (main body housing, hammer case 5) accommodating them; and a cover covering at least a portion of an outer surface of the enclosure portion. An airflow passage is formed between an outer surface of the hammer case and the cover and is configured so as to allow inflow and outflow of outside air. The cover is held so as to be slightly movable by sandwiching an elastic member in an axial line direction and, by the cover being moving forward and backward during its operation, air goes into or comes out of the airflow passage to cool the hammer case.