Abstract: The invention relates to a power tool with an electrically controlled commutating assembly comprising: an electrically controlled commutating assembly and a control unit; the electrically controlled commutating assembly has an electromagnetic unit; the electromagnetic unit is capable of performing a change in displacement due to electromagnetic action; the control unit has a control member, the control member is capable of changing a working direction of a power tool, and displacement of the electromagnetic unit is capable of actuating the control member of the control unit to make the power tool switch the working direction.

Abstract: The invention is an electric commutating ratchet tool comprising: a head; a ratchet mechanism with a rotating member and a latch member; the rotating member is capable of rotating, the latch member is capable of displacing and controlling rotation direction of the rotating member; and a commutating device with a commutating member, a magnetic driving member and a magnetic actuating unit; the commutating member is capable of displacing to abut against the latch member; the magnetic actuating unit is opposite to the magnetic driving member, either the magnetic actuating unit or the magnetic driving member is disposed on the commutating member; the magnetic actuating unit is at least one electromagnet; magnetic direction is changed through each of the electromagnets, so that the magnetic driving member is magnetically driven to change a position of the latch member.

Abstract: A stator of a brushless motor has an iron core, a bobbin, and a winding assembly. The iron core has multiple stator poles mounted on an interior annular surface of a core body and spaced apart from each other. The bobbin is mounted on one of two open ends of the core body and has a substrate, at least one neutral connector mounted on an upper surface of the substrate, and at least one neutral solder pad mounted in the at least one neutral connector. The winding assembly is formed by one wire wound on multiple stator poles and the connectors. The winding assembly is electrically connected to the at least one neutral solder pad.

Abstract: The present invention relates to an electric motor and an electric tool equipped with the electric motor. The electric motor includes a rotor, a stator, a coil module wound around the stator, a Hall unit and a wiring circuit unit. The Hall unit includes a Hall circuit board disposed around a rotating shaft of the rotor, and a Hall module for sensing rotation of the rotor. The wiring circuit unit is independent of the Hall circuit board and includes a three-phase power source interface. The wiring circuit unit electrically connects coils of the coil module to the power source interfaces respectively by groups. By separately disposing the Hall unit and the wiring circuit unit independently, a volume of the Hall circuit board can be reduced, and an area blocking an airflow path of a heat dissipation unit can be reduced, so heat dissipation effect of the electric motor and the electric tool can be improved.

Abstract: An electric vehicle transmission mechanism which is applied to drive a chain wheel of an electric vehicle is provided. The electric vehicle transmission mechanism includes a transmission shaft, an output shaft, a lower bearing and an upper bearing. The transmission shaft is connected to the chain wheel and has a transmission axial direction, and the transmission shaft includes a transmission portion. The output shaft includes an output portion engaged with the transmission portion, and the output shaft has an output axial direction substantially perpendicular to the transmission axial direction. The lower bearing is sleeved on the output shaft. The upper bearing is sleeved on the output shaft and located between the lower bearing and the output portion.

Abstract: An electric torque wrench capable of sensing a manual operating torque includes: an outer housing having an accommodating space at an internal thereof, a motor and a reduction device arranged therein; the reduction device having a reduction gear assembly with a hollow ring gear member; a front end of the ring gear member having at least one extension arm and at least one sensing plane formed thereon; a torque sensing unit arranged on the sensing plane; a driving device installed at the front end of the outer housing and having a working head arranged at the front end thereof; the extension arm of the ring gear member secured and attached onto the driving device. With the torque sensing unit installed on the extension arm, the electric torque wrench can be rotated manually with hand and is able to measure the torque value.

Abstract: An electric rivet nut machine comprises a motor having a first output shaft and a second output shaft; the first output shaft is connected with a first gear set, and the second output shaft is connected with a second gear set; and a rivet nut drive unit having a rivet nut shaft, a coupling gear and a moving gear; the coupling gear is engaged with the second gear set; the moving gear is engaged with the first gear set; through the first gear set and the second gear set of the motor respectively engaging with the rivet nut drive unit, and through the first output shaft and the second output shaft at two ends of the motor respectively engaging with the first gear set and the second gear set, different gear ratios can be formed, and better gear drive ratio can be produced for the rivet nut drive unit.

Abstract: An electric tool includes a motor section, a head section, a handle section, a coupling section, a battery, and a fragment ejecting mechanism. The head section is configured to twist off the fragment portion of a shear bolt. The coupling section detachably couples the head section to the motor section and allows the pointing direction of the front end of the head section to be changed along the radial direction of the motor shaft in the motor section. The fragment ejecting mechanism has a pushing portion and a driving portion. The pushing portion is provided in the head section and is configured to push out the twist-off fragment portion. The driving portion is provided at the coupling section and is configured to drive the pushing portion. The electric tool can twist off and then eject the fragment portion of a shear bolt even after the head section has changed direction.

Abstract: A torsional strain sensing device comprises a cylindrical hub and a frame. The frame surrounds the cylindrical hub and includes a first sidewall, an opposite second sidewall, a first connecting wall extended between the first sidewall and the second wall at one end, and a second connecting wall extended between the first sidewall and the second sidewall at the opposite end. The first sidewall has a first flat lateral outer surface, and the second sidewall has a second flat lateral outer surface. The first and second lateral outer surfaces are adapted for attachment of strain sensors thereon. A first cavity and a second cavity oppositely defined between the cylindrical hub and the frame.

Abstract: An electric bike having an improved effect of heat dissipation has a body, a driving device, and a battery. The body has a frame, a rear wheel, and a front wheel, wherein the rear wheel and the front wheel are mounted to the frame. The driving device is mounted to the body and has a motor and a shell. The motor is connected with the frame and has a front end near the front wheel and a rear end near the rear wheel. The shell covers the motor and has multiple inlets and multiple outlets disposed therethrough. The multiple inlets are located near the front end of the motor. The multiple outlets are located near the rear end of the motor. The battery is electrically connected to the motor. The front wheel, the battery, the motor, and the rear wheel are serially aligned.

Abstract: A brushless motor stator includes a stator core and a stator winding. The stator core has a stator frame, a coil carrier and multiple pole shoes. The coil carrier is mounted on one of the two openings of the stator frame and has a tooth base and multiple teeth. The teeth are formed on a top surface of the tooth base. The pole shoes are formed on the inner annular surface of the stator frame. The stator winding is formed by using a single wire to wind around the tooth base, the multiple teeth and the multiple pole shoes, and passing through three of the multiple slots of the coil carrier to extend beyond the outer annular surface of the stator frame to form three extended segments to correspond to U-phase, V-phase and W-phase output terminals of a motor, thereby reducing the number of spot-welding on a wiring board.

Abstract: A power tool has a clamping mechanism having an assembling mount and two clamping blocks. The assembling mount has a main body, a receiving recess defined in the main body, two first limiting troughs communicating with the receiving recess, and a through hole defined through a bottom of the receiving recess. The two clamping blocks are disposed in the receiving recess. Each one of the two clamping blocks has an abutting face corresponding to the bottom of the receiving recess in shape and facing to the bottom of the receiving recess. One of the two clamping blocks has two limiting ribs respectively inserted in the two first limiting troughs. The two limiting ribs respectively guided and blocked by the two first limiting troughs to prevent the clamping block from sliding downward along the bottom of the receiving recess.

Abstract: A power wrench includes an output spindle and a socket member. The output spindle has an axial through hole that extends through the output spindle and that open at two axially opposite ends of the output spindle. The socket member is connected to one of the axially opposite ends and has a first socket hole aligned with the axial through hole and configured to engage a nut or the like. The axial through hole is configured to permit passage of a bolt when the nut is tightened by the socket member.

Abstract: A twin hammer impact tool includes a hammer spindle, an inner ring hammer sleeved on the hammer spindle, an outer ring hammer disposed around the inner ring hammer, and rolling beads. The inner ring hammer has bead grooves each having a ball half-shape, and angularly spaced-apart hammer projections. The inner ring hammer is reciprocally movable relative to the hammer spindle while rotating together with the hammer spindle. The outer ring hammer has guiding grooves. The bead grooves respectively face and open toward the guiding grooves. Each rolling bead is received within one of the bead grooves and one of the guiding grooves. An output hammer has angularly spaced engagement projections to engage the hammer projections.

Abstract: A torsional strain sensing device comprises a cylindrical hub and a frame. The frame surrounds the cylindrical hub and includes a first sidewall, an opposite second sidewall, a first connecting wall extended between the first sidewall and the second wall at one end, and a second connecting wall extended between the first sidewall and the second sidewall at the opposite end. The first sidewall has a first flat lateral outer surface, and the second sidewall has a second flat lateral outer surface. The first and second lateral outer surfaces are adapted for attachment of strain sensors thereon. A first cavity and a second cavity oppositely defined between the cylindrical hub and the frame.

Abstract: A hand-held belt sander includes a head, an arm, a retaining unit, and a positioning unit. The head includes a mounting seat surrounding an axis. The arm has a sleeve segment mounted to the mounting seat. The retaining unit has an annular groove formed in the mounting seat, and multiple protrusions disposed on the sleeve segment and engaging the annular groove. The positioning unit includes multiple engaging grooves formed in the mounting seat, and an engaging member disposed on the sleeve segment. When the engaging member engages one of the engaging grooves, the arm is positioned relative to the head at an operating position. When the engaging member is disengaged from the one of the engaging grooves, the arm is rotatable about the axis relative to the head.

Abstract: A power operated dispensing tool includes a housing having a material packing receiving space, and a rod disposed within and movable relative to the housing and having a plunger head that is disposed in the material packing receiving space. The rod is operably coupled to a power transmitting mechanism so as to make a forward movement driven by a power of a motor through the power transmitting mechanism to discharge a dispensing material in the material packing receiving space. The rod has an initiating portion disposed to actuate a sensing member in the housing to deactivate the motor when the rod is moved forwardly to a first stop position. The rod can be moved manually to a second stop position to project the plunger head outwardly so as to permit a plunger kit to be attached thereto.

Abstract: A medical electric tool has a grip portion and a driving portion. The grip portion has a combining protrusion, two combining channels, and a locking device. The combining channels are defined respectively in two sides of the combining protrusion. The locking device is mounted in the combining protrusion and has two locking blocks and two recoil springs. Each locking block has an engaging segment. The engaging segment is formed on one end of the locking block and extends into one of the combining channels. The driving portion is detachably mounted on the combining protrusion on the grip portion and has a bottom face and two engaging ribs. Each engaging rib has an end provided with an engaging hook selectively engaging with the engaging segment of a corresponding one of the locking blocks.

Abstract: A handheld abrader has a body, a driving device, an eccentric device, and a grinding tray. The body has a handle and a gun body. The driving device is mounted in the gun body and has a driving shaft. The eccentric device is connected to the driving device and has a transmitting sheath, a transmitting shaft, and an eccentric sleeve. The transmitting sheath is connected to the driving shaft and has two positioning recesses and a receiving chamber. The transmitting shaft has at least one engaging face. The eccentric sleeve is movably mounted around the transmitting sheath and has at least one positioning slice abutting against the transmitting sheath in one of the positioning recesses and an engaging ring mounted in the eccentric sleeve, mounted around the transmitting shaft, and having at least one pressing arm selectively pressed against the transmitting shaft at the at least one engaging face.

Abstract: An electric rivet nut tool has a motor, a torque adjuster and a control device. The control device drives the motor to rotate a driving shaft so as to set a rivet nut. The torque adjuster serves to adjust a preset torque value. When a torque generated by the driving shaft exceeds the preset torque value of the torque adjuster and it represents that the rivet nut setting job is completed, the torque adjuster then displace for the control device to detect the displacement and drive the motor to reversely rotate. Given the torque adjuster and the control device, the problems of being time-consuming, inefficient, increasing in cost and damage prone to rivet nut or motor upon setting rivet nut because of the manual switch of forward or reverse rotation of an electric rivet nut tool can be effectively resolved.