An electric power tool includes an electrical motor adapted to drive a rotating shaft. The electric motor is adapted to be fed with a pulsed current where the pulsed current includes a main current pulse (A) in a first direction driving the rotating shaft in a first direction and adapted to provide a current (C) in an opposite direction following the main current pulse to retract the electrical power tool. The pulsed current prior to the current (C) in the opposite direction includes a first pre-pulse current pulse (B) in the same direction as the current in the opposite direction and of a magnitude lower than the current (C). The pulsed current prior to the main pulse includes a second pre-pulse current pulse (D) which is in the same direction as the main current pulse and of a magnitude lower than the main current pulse.

A torque transfer assembly for a bit holder includes an axial movement limiting subassembly and a rotation limiting subassembly. The axial movement limiting subassembly is configured to retain a drive body of the bit holder in proximity to a driven body of the bit holder. The rotation limiting subassembly is configured to cause torque applied to the drive body to be transferred to the driven body. The rotation limiting subassembly includes a first cam body at a distal end of the drive body and a second cam body at a distal end of the driven body. The first and second cam bodies are configured to transfer a majority of the torque between the drive body and the driven body indirectly via the torque transfer assembly by limiting rotation of the first cam body relative to the second cam body.

A torque connector includes a first body provided with a pivot seat, at least one first receiving recess, and at least one second receiving recess, a second body provided with a pivot slot, a plurality of locking portions, and a plurality of projections, at least one drive member received in the at least one first receiving recess, and at least one elastic member received in the at least one second receiving recess and resting on the at least one drive member. When one of the locking portions aligns with the at least one first receiving recess, the at least one drive member is pushed by the at least one elastic member and locked in one of the locking portions, such that the second body drives and rotates the at least one drive member and the first body.

Systems, methods and apparatus for automated vehicle wheel removal and replacement are provided. One system includes a computer system with applications for scheduling the replacement of tires for the vehicle. An electronically controlled lift device and robotic apparatus is configured for interaction with the computer system. The lift device mechanically adjusts arms for placement on lift points of vehicles. The robotic apparatus detects positioning of lug nut configuration for a wheel, removes lug nuts, and then removes the wheel from the wheel hub with gripping arms. The wheel and tire are then handed off to a separate tire changing machine. When a new tire is replaced the robotic apparatus then mounts the wheel to the original wheel hub, and then secures the lug nuts to the lug nut bolts.

The present invention relates to torque application tools, such as a torque screwdriver and ratchet tools, with one or more light indicators disposed in a ring shape around the tool. The light indicators are adapted to indicate amounts of torque values and/or angle values as the tool is used to tighten or install a work piece. For example, the light indicators may flash at a first flashing rate, when about 40% of a target torque or angle value is applied; flash at a second flashing rate (greater or faster than the first flashing rate) when about 60% of the target torque or angle value is applied; and illuminate at a solid state when about 80% of the target torque or angle value is applied.

The present invention relates to torque application tools, such as a torque screwdriver and ratchet tools, with one or more light indicators disposed in a ring shape around the tool. The light indicators are adapted to indicate amounts of torque values and/or angle values as the tool is used to tighten or install a work piece. For example, the light indicators may flash at a first flashing rate, when about 40% of a target torque or angle value is applied; flash at a second flashing rate (greater or faster than the first flashing rate) when about 60% of the target torque or angle value is applied; and illuminate at a solid state when about 80% of the target torque or angle value is applied.

The disclosure relates to a method for operating a handheld power tool having an electric motor, the method comprising: S1 providing at least one model signal waveform that is associated with a work progress of the handheld power tool; S2 determining a signal of an operating variable of the electric motor; S3 comparing the signal of the operating variable with the model signal waveform and determining a conformity evaluation on the basis thereof; S4 identifying the work progress at least partially using the conformity evaluation; S5 executing a first routine of the handheld power tool at least partially on the basis of the work progress identified in method step S4. The disclosure also relates to a handheld power tool, in particular an impact driver, comprising an electric motor and a control unit, wherein the control unit is designed to carry out a method according to the disclosure.

A control method of an impact wrench for setting an expansion anchor carries out a first sequence in response to a button being pressed. In a first phase, a rotary impact is repeatedly exerted on a screw element of the expansion anchor and a torque transmitted from the rotary impact to the screw head is estimated. The first phase S1 is continued until the estimated transmitted torque exceeds a threshold value specified for the expansion anchor. In a second phase, a number of rotary impacts specified for the expansion anchor are exerted on the screw head. If the button is released before the end of the first sequence, a premature release of the button and the phase in which the button was released is stored in a memory. In response to the button being pressed when a premature release is stored in the memory, a second sequence is carried which depends on the phase in which the button was previously released.

A torque transfer assembly for a bit holder includes an axial movement limiting subassembly and a rotation limiting subassembly. The axial movement limiting subassembly is configured to retain a drive body of the bit holder in proximity to a driven body of the bit holder. The rotation limiting subassembly is configured to cause torque applied to the drive body to be transferred to the driven body. The rotation limiting subassembly includes a first cam body at a distal end of the drive body and a second cam body at a distal end of the driven body. The first and second cam bodies are configured to transfer a majority of the torque between the drive body and the driven body indirectly via the torque transfer assembly by limiting rotation of the first cam body relative to the second cam body.

An electric power tool includes: a driving shaft that is rotated by a motor; an output shaft on which a front-end tool is attachable; and a torque transmission mechanism that transmits a torque produced by the rotation of the driving shaft to the output shaft. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of the driving shaft and a driven magnet member coupled to a side of the output shaft, and the driving magnet member and the driven magnet member are provided such that respective magnetic surfaces face each other, S-poles and N-poles being alternately arranged on each of the magnetic surfaces.