Abstract: A motorized gear reducer is provided with a hollow motor in the housing and including an annular rotor having a through hole, and a shaft passing through the through hole; and a planetary gear train in the through hole and placed on the shaft, the planetary gear train including a sun gear assembly having a first sun gear in the housing, and a second sun gear on the shaft; planet gear assemblies equally spaced apart around the sun gear assembly, each including a first planet gear meshing with the first sun gear, and a second planet gear coaxially disposed with the first planet gear and meshing with the second sun gear; and a ring gear on an inner surface of the rotor. A speed reduction ratio of a first stage and a speed reduction ratio of a second stage are rendered.

Abstract: A torque sensing device includes an idle wheel disposed between a force input shaft and a force output shaft, the idle wheel receives a tangential force from the force input shaft and the force output shaft to generate a counterforce as a loading, the center of the idle wheel is pivotally disposed on a positioning beam or a basis nearby, the positioning beam has a beam central line where a strain gauge installed. The positioning beam transforms the loading of the idle wheel along the beam central line to a normal force on the cross section of the positioning beam along the beam central line, the positioning beam generates a strain due to the normal force on the cross section of the positioning beam, the strain gauge detects the strain as the torsion sensing value of the output shaft on the region between the force input shaft and the force output shaft. A rotational driving tool is combined with the torque sensing device to improve the detecting precision of the torsion.

Abstract: A motorized gear reducer is provided with a hollow motor in the housing and including an annular rotor having a through hole, and a shaft passing through the through hole; and a planetary gear train in the through hole and placed on the shaft, the planetary gear train including a sun gear assembly having a first sun gear in the housing, and a second sun gear on the shaft; planet gear assemblies equally spaced apart around the sun gear assembly, each including a first planet gear meshing with the first sun gear, and a second planet gear coaxially disposed with the first planet gear and meshing with the second sun gear; and a ring gear on an inner surface of the rotor. A speed reduction ratio of a first stage and a speed reduction ratio of a second stage are rendered.

Abstract: A torque sensing device includes an idle wheel disposed between a force input shaft and a force output shaft, the idle wheel receives a tangential force from the force input shaft and the force output shaft to generate a counterforce as a loading, the center of the idle wheel is pivotally disposed on a positioning beam or a basis nearby, the positioning beam has a beam central line where a strain gauge installed. The positioning beam transforms the loading of the idle wheel along the beam central line to a normal force on the cross section of the positioning beam along the beam central line, the positioning beam generates a strain due to the normal force on the cross section of the positioning beam, the strain gauge detects the strain as the torsion sensing value of the output shaft on the region between the force input shaft and the force output shaft. A rotational driving tool is combined with the torque sensing device to improve the detecting precision of the torsion.

Abstract: A dynamic clutch apparatus for an electrical nail gun includes a pair of symmetric direct stroke apertures formed on a gun body support; a firing pin set slidably installed on a side of the gun body support; a guiding base movably installed inside the gun body support; a pair of symmetric oblique stroke apertures formed on the guiding base. Aperture walls of the oblique and direct stroke apertures encircle and form an interconnected through aperture. Two pivot bearings are slidably installed inside the through aperture. A flywheel for accumulating kinetic energy is installed between the pivot bearings coaxially. An electromagnetic driver drives the guiding base to move, causing the through aperture to restrict the pivot bearings and the flywheel to move and press the firing pin set. Then, the firing pin set passes nail-percussion kinetic energy along a nail-percussion axial direction.

Abstract: A fastener driver comprises a housing and a magazine configured to retain a plurality of fasteners. A driver assembly is positioned within the housing and is configured to provide an expulsion force that expels one of the plurality of fasteners from the magazine. The device further includes a lockout member configured to pivot about a pivot axis between an unlocked position and a lockout position. The pivot axis is configured to move relative to the housing when a work contact element is depressed. The driver assembly is prevented from providing the expulsion force when the lockout arm is in the lockout position. The pivot arm moves from the unlocked position to the lockout position when a low level of fasteners remains in the magazine.

Abstract: A driving device for resetting a hitting nail bar of the pneumatic nail gun, which is mounted in a gun body including a main air chamber, a trigger valve, a hitting nail bar and a bottom cylinder chamber disposed therein is provided. The driving device includes a main gas channel and a sensing valve component slidably disposed in the main gas channel. The main gas channel communicates with the main air chamber and the bottom cylinder chamber via the trigger valve. The sensing valve component is controlled by the position of the hitting nail bar to be either opened or closed. The sensing valve component is opened on the condition that a reset state of the hitting nail bar is excluded, and the high-pressure air is introduced from the main air chamber into the bottom cylinder chamber to drive the hitting nail bar to move upwardly to reset rapidly.

Abstract: A dynamic clutch apparatus for an electrical nail gun is disclosed and includes a pair of symmetric direct stroke apertures formed on a gun body support; a firing pin set slidably installed on a side of the gun body support; a guiding base movably installed inside the gun body support; a pair of symmetric oblique stroke apertures formed on the guiding base. Aperture walls of the oblique and direct stroke apertures encircle and form an interconnected through aperture. Two pivot bearings are slidably installed inside the through aperture. A flywheel for accumulating kinetic energy is installed between the pivot bearings coaxially. An electromagnetic driver drives the guiding base to move, causing the through aperture to restrict the pivot bearings and the flywheel to move and press the firing pin set. Then, the firing pin set passes nail-percussion kinetic energy along a nail-percussion axial direction.

Abstract: A device for driving a plurality of fasteners includes a driver assembly having a drive block, a flywheel and a driver mount. The driver mount is configured to move between a first position where the flywheel is removed from the drive block and a second position where the flywheel engages the drive block. The device also includes a work contact element configured to move between an extended position and a depressed position. A blocking arm is connected to the work contact element and configured to move with the work contact element. The blocking arm is positioned in a path of movement of the driver mount when the work contact element is in the extended position. The blocking arm is removed from the path of movement of the driver mount when the work contact element is in the depressed position.

Abstract: A shock proof structure of a battery pack for receiving a battery cell is formed in an electrical tool. The battery pack includes a base having a space for receiving the battery cell and a lid for opening or closing the space. The space has a plurality of first buckling portions separated by a gap disposed at a bottom side thereof. A plurality of second buckling portions with shock absorbance is formed at an inner sidewall of the lid. The plate sets include two plates separated by a gap are symmetrically positioned. The plates of each plate set have a second buckling portion with a stretching gap formed in between. The second buckling portion is positioned at the opposite end of the first buckling portion to provide the battery cell to be steadily buckled between the first and the second buckling portions.

Abstract: A latching mechanism for a battery pack of an electrical tool includes a button slidingly positioned in the battery pack, and the battery pack can be received in a groove formed on an end of the handle of the electrical tool. The button has a latching element positioned on each side of the path, and a pushing element is positioned between the button and the latching element; the pushing element can move back and forth along the button to further drive the latching element to move back and forth, and enable the latching element to buckle to the inner sidewall of the groove outside the two sides of the base and release from the inner sidewall of the groove thereby, as well to position and release the battery pack in the groove.

Abstract: A nail-pushing rod restoring apparatus for a pneumatic nail gun includes a return air passage connected between a high-pressure main air chamber inside a gun body and a bottom cylinder chamber of a cylinder. A magnetic valve is disposed inside the gun body above the cylinder and located on the return air passage. An end of the magnetic valve is exposed inside a top cylinder chamber of the cylinder. The magnetic valve is lead by the piston to close the return air passage when the piston moves to the top of the cylinder. The magnetic valve is driven by the high-pressure air inside the top cylinder chamber to open the return air passage when the piston moves downward, so as to lead the high-pressure air inside the main air chamber to the bottom cylinder chamber to restore a nail-pushing rod after nail-pushing.

Abstract: A tool for driving fasteners includes a work contact element configured to move between a first position and a second position. The tool is prevented from driving fasteners when the work contact element is in the first position. The tool further includes an extension member rigidly connected to the work contact element in a releasable connection arrangement. The releasable connection arrangement is configured to maintain a rigid connection between the work contact element and the extension member during normal operation of the tool. The releasable connection arrangement is further configured to release the rigid connection between the work contact element and the extension member during high impact events that are not associated with normal operation of the tool.

Abstract: A nailing depth adjusting device of a palm-type nail gun, installed in a containing recess, which is for the hammer rod to go through, at the bottom of the nail gun body. In side of the containing recess is provided with at least one guiding indentation and an adjusting sleeve. One end of the adjusting sleeve adjacent to the guiding indentation is slidably engaged in an outside wall of a guiding piece by threads. The guiding piece includes at least one guiding pillar slidably engaged in the guiding indentation. Users may rotate the adjusting sleeve to control the position of the guiding piece. Inside the adjusting sleeve is provided with an telescopic conduit. One end of the conduit is exposed outside of the adjusting sleeve. The conduit can touch the surface of the work piece, which causes the conduit to move until touching the guiding piece and thereby, adjust the nailing depth of the hammer rod.

Abstract: A pneumatic nailer includes a main compressed air reservoir, a bottom cylinder chamber, a nail driving rod, an air compressor, a safety rod, and a trigger valve. A resetting and driving mechanism includes a main passage, a first valve member, a startup switch, a power off switch, and an auxiliary passage. The main passage is connected between the main compresses air reservoir and the bottom cylinder chamber. The first valve member is slidably disposed in the main passage and includes an inner end portion for driving the compressed air and an outer end portion for pushing the safety rod. The startup switch is capable of starting the air compressor when the safety rod moves to trigger the startup switch. The power off switch can shut down the air compressor. The auxiliary passage communicates with the main compressed air reservoir and extends to a proximal side of the power off switch.

Abstract: A tool for driving fasteners includes a work contact element configured to move between a first position and a second position. The tool is prevented from driving fasteners when the work contact element is in the first position. The tool further includes an extension member rigidly connected to the work contact element in a releasable connection arrangement. The releasable connection arrangement is configured to maintain a rigid connection between the work contact element and the extension member during normal operation of the tool. The releasable connection arrangement is further configured to release the rigid connection between the work contact element and the extension member during high impact events that are not associated with normal operation of the tool.

Abstract: A driving device for resetting a hitting nail bar of the pneumatic nail gun, which is mounted in a gun body including a main air chamber, a trigger valve, a hitting nail bar and a bottom cylinder chamber disposed therein is provided. The driving device includes a main gas channel and a sensing valve component slidably disposed in the main gas channel. The main gas channel communicates with the main air chamber and the bottom cylinder chamber via the trigger valve. The sensing valve component is controlled by the position of the hitting nail bar to be either opened or closed. The sensing valve component is opened on the condition that a reset state of the hitting nail bar is excluded, and the high-pressure air is introduced from the main air chamber into the bottom cylinder chamber to drive the hitting nail bar to move upwardly to reset rapidly.

Abstract: A device for driving a plurality of fasteners includes a driver assembly having a drive block, a flywheel and a driver mount. The driver mount is configured to move between a first position where the flywheel is removed from the drive block and a second position where the flywheel engages the drive block. The device also includes a work contact element configured to move between an extended position and a depressed position. A blocking arm is connected to the work contact element and configured to move with the work contact element. The blocking arm is positioned in a path of movement of the driver mount when the work contact element is in the extended position. The blocking arm is removed from the path of movement of the driver mount when the Work contact element is in the depressed position.

Abstract: A fastener driver comprises a housing and a magazine configured to retain a plurality of fasteners. A driver assembly is positioned within the housing and is configured to provide an expulsion force that expels one of the plurality of fasteners from the magazine. The device further includes a lockout member configured to pivot about a pivot axis between an unlocked position and a lockout position. The pivot axis is configured to move relative to the housing when a work contact element is depressed. The driver assembly is prevented from providing the expulsion force when the lockout arm is in the lockout position. The pivot arm moves from the unlocked position to the lockout position when a low level of fasteners remains in the magazine.

Abstract: An actuator is arranged in a housing of an electrical nail gun. The actuator includes a sliding base, an external-running brushless direct current motor, a swing base and an electric driver. The sliding base is slidably disposed on an end of a located supporter which is positioned in the housing. The sliding base loads a spring and forms a hitting nail bar thereon. The motor has a stator and a rotator attached on an outer wall of the stator. A flywheel is driven by the motor and is configured to engage or disengage with/from the sliding base. The swing base is pivotally mounted on the housing. The swing base is adjacent to the sliding base and the supporter. The motor is installed in the swing base. The electric driver is attached to the housing and is adjacent to an end side of the swing base. The electric driver has a rod member driven by electricity.