A torque wrench includes a wrench body, a deformable rod, a torque adjustment mechanism, a switch and an alarm. The wrench body includes a working section and a gripping section. Two ends of the deformable rod are fixed to the working section and the gripping section respectively, and a middle section is formed in-between. The torque adjustment mechanism is installed in the gripping section and includes a knob and an abutting member. The knob adjusts the abutting member to be proximate to or away from the middle section. The switch is disposed between the middle section and the torque adjustment mechanism. The alarm is electrically connected to the switch, and the middle section is in a bending deformation toward the abutting member, when load of the working section is greater than a set torque, to touch the switch and trigger the alarm to generate a warning signal.

A torque wrench including a head, a handle, a primary beam, a secondary beam, and a torque adjustment mechanism. The primary beam couples the head and the handle for co-rotation about the rotational axis and the primary beam includes a first end adjacent the head and a second end adjacent the handle. The secondary beam is coupled to the head for rotation with the head about the rotational axis and the secondary beam is movable relative to the primary beam and the handle. The torque adjustment mechanism adjusts a torque setting of the primary beam relative to the secondary beam. The torque adjustment mechanism includes a thumb adjustment wheel that a user rotates about a first axis to adjust the torque setting by moving the second end of the primary beam relative to the handle along a second axis offset from the first axis.

A ratchet wrench (1) has a flexible clutch ring (500) that forms the mid part of a laminate-like structure comprising a wrench head (200), the clutch ring (500) and a drive element (40). When under load, the compression forces applied to the clutch ring (500) are substantially dissipated around its circumference (508) and inner surface (509), this inward force clamping upon the inherently strong drive outer surface (45). The laminate-like construction enables a reduction in the width or depth of the wrench head without a loss in strength.

A powered ratcheting wrench includes a main housing defining a grip portion, a motor having a motor drive shaft, a drive assembly coupled to the motor drive shaft and driven by the motor, and an output assembly coupled to the drive assembly. The output assembly includes an output member that receives torque from the drive assembly, causing the output member to rotate about an axis. The powered ratcheting wrench further includes a head housing coupled to the main housing and supporting at least a portion of the drive assembly. The head housing is composed of an aluminum alloy resulting in a center of gravity for the power tool to be proximate the grip portion.

A power ratchet wrench head has a gear set, a crank set, and a ratchet set. The crank set is connected to the gear set and has an outer casing and a crankshaft. The ratchet set is connected to the crank set and has a ratchet yoke, a transmission shaft, and a control knob. The transmission shaft engages with the ratchet yoke and has a pushing rod, an elastic element, a ratchet pawl, and two fixing pins. The pushing rod is disposed in the transmission shaft. The elastic element is disposed in the transmission shaft and abuts against the pushing rod. The ratchet pawl engages with the ratchet yoke and abuts against the pushing rod. The control knob is rotatably connected to the transmission shaft.

A ratchet wrench comprises: a handle; a first member having an annular surface provided thereon with a plurality of teeth parallel to an axial direction thereof; a second member configured to rotate circumferentially with respect to the annular surface, the second member having at least two recesses arranged circumferentially around it; and at least two first drive transmission members disposed in the respective recesses of the second member, each of the first drive transmission members comprising at least one ratchet tooth, the first drive transmission members configured to be engaged with the teeth to transmit movement in a first direction between the first member and the second member, wherein each of the first drive transmission members is in a different engagement configuration with the teeth, wherein one of the first member and the second member is coupled to the handle and configured to be driven by the handle to rotate.

A socket wrench with a reversible structure includes a rod, a sleeve, a first ratchet block and a second ratchet block. The rod has a columnar surface, and includes a first slot and a second slot. The first slot and the second slot are disposed on different positions along an axis direction of the rod. The sleeve is slidably sleeved on the rod, and includes an accommodating end and a driving end. The accommodating end includes a toothed segment which is protruded radially inward from an inner wall of the accommodating end. The first ratchet block is movably disposed in the first slot and includes a first ratchet portion. The second ratchet block is movably disposed in the second slot and includes a second ratchet portion. The toothed segment of the sleeve is selectively engaged with one of the first ratchet block and the second ratchet block.

One example of the present disclosure relates to a method of applying torque to an object, which threadably engages a part. The torque is applied with a wrench, comprising a first handle, a second handle, a planetary gear mechanism, a drive that comprises an internal gear and an external gear, and a first pawl, movably coupled to the first handle and biased to contact the external gear of the drive. When the drive is coupled to the object, the method comprises transmitting an input torque to the drive by rotating at least one of the first handle and the second handle relative to the part. The first pawl is movable between a first position and a second position relative to the first handle may or may not operatively engage the external gear of the drive.

A power tool comprises a housing defining a grip portion, a motor having a motor drive shaft, a drive assembly including a crankshaft configured to receive torque from the motor drive shaft, an output assembly having an output member configured to receive torque from the crankshaft, a bearing rotatably supporting the crankshaft, a retainer configured to prevent translation of the bearing along the crankshaft past the retainer, and a transducer assembly disposed between the grip portion and the output member to measure the amount of torque applied through the output member.

A ratchet screwdriver includes a mounting seat, a control member, a driving shaft, two pawls and two springs. The mounting seat has a receiving space, a first slot and a second slot. A passage is defined through the mounting seat. The first and second slots have a hole respectively. The driving shaft has a ratchet portion located in the receiving space. Each pawl is biased by one spring so as to be engaged with the ratchet portion. The control member is rotatably mounted to the mounting seat and the driving shaft. The control member has two control plates to pivot the pawls to disengage from the ratchet portion of the driving shaft.