A tool housing and method for making the same are disclosed. The tool housing can include upper and middle portions that are fully machined and coupled to one another. The tool housing can also include a lower housing that is partially machined, coupled to the remaining housing portions, and then fully machined. In doing so, the machining operation is eased and the portions of the housing are better aligned with one another.

A powered ratchet tool including a housing and a drive mechanism for driving an output member. The drive mechanism includes a yoke through which the output member extends. The ratchet tool further comprises a first selective pawl, a second selective pawl, and a non-selective pawl in the yoke that are biased toward an outer toothed surface of the output member. The outer toothed surface includes first and second selectively-toothed sections. When the first selectively-toothed section and second selectively-toothed sections are rotationally aligned with the with the first selective pawl and the second selective pawl, the first and second selective pawls are incapable of transferring torque to the output member.

An electric ratchet wrench as one example of the ratchet wrench includes an electric motor, a holder that rotatably holds a socket via a one-way clutch mechanism, and a spindle configured to convert a driving force from the motor into a reciprocating rotation motion of the holder. A space is provided between the socket and the holder. The space includes large interval portions and small interval portions. The small interval portions are adjacent to the large interval portions in a rotation direction (lock direction) of the socket and have distances smaller than distances of the large interval portions. Additionally, the one-way clutch mechanism includes columnar locking pins disposed between the spaces and have a diameter with a size equal to or less than the distances of the large interval portions and exceeding the distances of the small interval portions.

A computer implemented method for controlling commutation of a brushless DC (BLDC) motor. The method includes controlling a switching array to drive the BLDC motor at a first commutation, receiving and monitoring power consumption signals indicating power consumption of the BLDC motor, determining whether the power consumption exceeds a first threshold value, and controlling the switching array to drive the BLDC motor at a second commutation when the power consumption exceeds the first threshold value.

In order to provide an electric tool with good operability that can extend the life of and suppress breakage of a switching element for controlling energization of a brushless motor, a control unit (50), after an operation switch (5) is turned off, does not immediately turn off an inverter circuit (43) (does not set the duty of a PWM signal to 0), and instead normally operates the inverter circuit (43) with a low-duty PWM signal and waits until a rotation speed of a brushless motor (6) reaches a predetermined rotation speed or less to turn off the inverter circuit (43) (to set the duty of the PWM signal to 0).

An electric ratchet wrench includes a driving member rotatably mounted in a body. A pawl device is pivotably mounted to the driving member. A ring gear is rotatably mounted around the driving member. A flexible transmission shaft includes a first end connected to a motor and a second end configured to switch between a meshing state meshed with the ring gear and a disengagement state disengaging from the ring gear. The motor drives the transmission shaft to rotate the driving member. The body can be manually driven to overcome a resistance which is larger than the torque outputted by the motor and which causes a tooth slippage phenomenon between the transmission shaft and the ring gear.

The invention relates to a tool connection for arranging a riveting tool on a riveting tool receptacle, having a contact surface arranged on the riveting tool for supporting the riveting tool on a supporting surface arranged on the riveting tool receptacle. In order to provide a tool connection for arranging a riveting tool on a riveting tool receptacle, by means of which a repetitive riveting operation can be carried out without damage and it is particularly simple to replace the riveting tool, it is provided that a journal is arranged on one of the riveting tool or riveting tool receptacle and a journal receptacle is arranged on the other of the riveting tool or riveting tool receptacle, the journal can be introduced into and removed from the journal receptacle and the riveting tool can be releasably locked to the riveting tool receptacle by a magnetic force.

A preferred embodiment of the present invention is directed to a rotary tool and, more specifically, to a pneumatic wrench that can be used as both a standard socket wrench and as a fastening tool for setting HI-LOK-type fasteners commonly used in the aviation industry. In a preferred embodiment, the wrench comprises a handle and a rotational member connected to the handle, said rotational member configured for exerting torque about an axis of rotation in one direction only. The wrench further comprises a hole extending through the rotational member along the axis of rotation. The hole has two ends each having female threads. One end has right-hand threads and the second end has left-hand threads. The tool further comprises socket adaptors having right-hand and left-hand male threads for attaching the adaptors to the wrench. Each socket adaptor also has a through hole that aligns with the hole in the rotational member. The holes allow a hex key to be inserted through the wrench so that the wrench can be used to fasten HI-LOK fasteners. The simple design of the tool results in a wrench that is easy to use and relatively inexpensive to manufacture. A preferred embodiment of the invention further comprises a method of using the wrench.

An angle tool having an output shaft part the height of which is low is provided. The angle tool includes an output shaft having a chuck part capable of holding a bit, a shaft that is provided so as to intersect the output shaft and that transmits drive force to the output shaft, and a gear housing that accommodates the shaft. The entirety of the chuck part is disposed in the gear housing. The output shaft includes a bevel gear that receives drive force from the shaft, and the chuck part is disposed inside the bevel gear. The chuck part is disposed in front of the shaft so as to intersect an extended line of a center axis of the shaft.

The present invention relates broadly to commutation control of a BLDC motor for use with, for example, a power tool. The method uses a controller to control a BLDC motor in the event of a position sensor failure. Rather than ceasing operation of the motor and indicating a fault or error message to the user, the present invention determines when the next transition should occur based on the time between past hall transitions using a timer. Thus, if one or two position sensors are no longer providing position information to the controller, the controller can determine when the transitions would be changing based on past transitions to continue controlling the motor and prevents the motor from ceasing operation.