A nail gun structure includes a body portion including a punch portion; an air cylinder between the body portion and a swaying clamp arm, and having a telescopic rod pivotally connected with the clamp arm, the air cylinder having a piston, a first bore and a second bore disposed along an axial direction of the telescopic rod, the piston connected with the telescopic rod and reciprocating to control the communication of the second bore; and a control valve disposed between the air cylinder and the body portion, and having a tube set connected with an air source and also between the air cylinder and the body portion. When the air source and the tube set communicate with the first bore, the piston moves to allow the communication of the second bore. After the clamp arm clamping a wooden board, the punch portion punches to launch the nail.

A method for controlling a motor of a power tool including performing a load test on a battery pack of the power tool, determining, via a first controller, a first mechanism control scheme based on the load test, receiving, via the first controller, a user input indicative of beginning an operation cycle of the power tool, and isolating the first controller from a second controller. The method further including controlling, via the first controller, the motor based on the first mechanism control scheme, sensing a dataset indicative of a result of the operation cycle based on the first mechanism control scheme, receiving, via the second controller, the dataset, connecting the first controller to the second controller upon completion of the operation cycle, transmitting, via the second controller, the dataset to the first controller, and determining, via the first controller, a second mechanism control scheme based on the dataset.

A fastener driver includes a housing, a cylinder disposed within the housing, a piston positioned and moveable within the cylinder, and a driver blade. The driver blade includes a body defining a first end having an aperture defined therein and a second end opposite the first end. The aperture is sized to receive a fastener to attach the driver blade to the piston. The driver blade is moveable with the piston from a first position toward a second position along a longitudinal axis during a fastener driving operation. A nosepiece at least partially defining a fastener driving track through which fasteners are driven. A total length of the fastener driver as measured between a distal end of the nosepiece and a distal end of the cylinder is less than 11.4 inches (289.6 mm).

A gas spring-powered fastener driver includes an outer cylinder, an inner cylinder positioned within the outer cylinder, and a moveable piston positioned within the inner cylinder. The gas spring-powered fastener driver further includes a driver blade attached to the piston and movable therewith between a top-dead-center (TDC) position and a driven or bottom-dead-center (BDC) position. The outer cylinder and the inner cylinder define a first total volume in which gas is located when the driver blade is in the TDC position. The outer cylinder and the inner cylinder define a second total volume, in which gas is located when the driver blade is in the BDC position. A compression ratio of the second total volume to the first total volume is 1.7:1 or less. And, a force acting on the driver blade when located in the TDC position is at least 90 pound-force (lbf) but no more than 450 pound-force (lbf).

A portable linear fastener driving tool is provided that drive staples, nails, or other linearly driven fasteners. The tool uses a gas spring principle, in which a cylinder filled with compressed gas is used to quickly force a piston through a driving stroke movement, while a driver also drives a fastener into a workpiece. The piston/driver is then moved back to its starting position by use of a rotary-to-linear lifter, and the piston again compresses the gas above the piston, thereby preparing the tool for another driving stroke. The driver has protrusions along its edges that contact the lifter, which lifts the driver during a return stroke. A pivotable latch is controlled to move into either an interfering position or a non-interfering position with respect to the driver protrusions, and acts as a safety device, by preventing the driver from making a full driving stroke at an improper time.

A driving device for a nail gun includes a striking unit and an air storage unit. The striking unit includes a striking cylinder connected to the nail gun and defining a cylinder chamber having an opening, and a piston disposed in and making an air-tight contact with the striking cylinder. The air storage unit includes an air storage cylinder including a protrusion that protrudes toward the opening and cooperating with the striking cylinder to define an air storage chamber that is in fluid communication with the cylinder chamber via the opening. When the piston moves in a pressure-generating direction, air in the air storage chamber is pressurized. The air storage unit further includes a lubricant disposed in the cylinder chamber and the air storage chamber, and flowing along the protrusion into the cylinder chamber to lubricate the piston.

A powered fastener driver includes a driver blade movable from a top-dead-center (TDC) position to a bottom-dead-center (BDC) position for driving a fastener into a workpiece and a drive unit for providing torque to move the driver blade from the BDC position toward the TDC position. A rotary lifter is engageable with the driver blade and configured to receive torque from the drive unit for returning the driver blade from the BDC position toward the TDC position. The lifter has a body, a drive pin coupled to the body, and a roller positioned on the drive pin. The roller includes an engagement section configured to receive an end portion of a tooth of the driver blade. The lifter includes a means for aligning the engagement section with the end portion of the tooth on the driver blade to facilitate meshing between the end portion and the roller.

A portable linear fastener driving tool is provided that drive staples, nails, or other linearly driven fasteners. The tool uses a gas spring principle, in which a cylinder filled with compressed gas is used to quickly force a piston through a driving stroke movement, while a driver also drives a fastener into a workpiece. The piston/driver is then moved back to its starting position by use of a rotary-to-linear lifter, and the piston again compresses the gas above the piston, thereby preparing the tool for another driving stroke. The driver has protrusions along its edges that contact the lifter, which lifts the driver during a return stroke. A pivotable latch is controlled to move into either an interfering position or a non-interfering position with respect to the driver protrusions, and acts as a safety device, by preventing the driver from making a full driving stroke at an improper time.

A pneumatic or hydraulic mechanism has a housing defining a piston chamber and having a fluid inlet port. A piston is slidable in the piston chamber. The piston partitions the piston chamber into a front chamber and a rear chamber. The piston has one or more passages for fluid communication between the rear chamber and the front chamber, the one or more passages being sealed by a sealing mechanism. The sealing mechanism has a sealing state in which the sealing mechanism substantially inhibits fluid communication between the rear chamber and the front chamber, and a non-sealing state in which the sealing mechanism allows fluid communication between the rear chamber and the front chamber. The piston is slidable between a first position and a second position. When the piston is positioned in the first position, the sealing mechanism is in the sealing state. Upon supply of a fluid to the inlet port, the fluid urges the piston to its second position and then causes the sealing mechanism to change to the non-sealing state until the pressure in the rear chamber and the front chamber equalises, allowing the sealing mechanism to return to the sealing state. Upon removal of fluid from the rear chamber, the fluid in the front chamber urges the piston to return to its first position.

A portable linear fastener driving tool is provided that drive staples, nails, or other linearly driven fasteners. The tool uses a gas spring principle, in which a cylinder filled with compressed gas is used to quickly force a piston through a driving stroke movement, while a driver also drives a fastener into a workpiece. The piston/driver is then moved back to its starting position by use of a rotary-to-linear lifter, and the piston again compresses the gas above the piston, thereby preparing the tool for another driving stroke. The driver has protrusions along its edges that contact the lifter, which lifts the driver during a return stroke. A pivotable latch is controlled to move into either an interfering position or a non-interfering position with respect to the driver protrusions, and acts as a safety device, by preventing the driver from making a full driving stroke at an improper time.