Abstract: A torque wrench has a hollow tubular body. A long rod and a short rod are provided in the hollow tubular body. The hollow tubular body is formed with a first through hole and a second through hole respectively corresponding to the long rod and the short rod. A first limiting unit is provided in the first through hole, and a second limiting unit is provided in the second through hole. The first limiting unit enables to slide into a first gap spaced apart between the long rod and the hollow tubular body to limit the swing range of the long rod, and the second limiting unit enables to slide into a second gap spaced apart between the short rod and the hollow tubular body to limit the swing range of the short rod, thereby improving the accuracy of the tripping torque and making the torque wrench easy to calibrate.

Abstract: An electro-mechanical torque wrench has a main body. A trip mechanism is provided in the main body. The trip mechanism includes a long rod and a short rod arranged side-by-side. A release member is connected between the long rod and the short rod. When in operation, the long rod and the short rod are subject to torque to cause flex. When the torque reaches a preset torque value, the release member is released to generate a mechanical sound and vibration to prompt a user to stop operation. The long rod is provided with at least one strain sensor, and the strain sensor is connected with a display module for sensing the amount of deformation of the long rod and transmitting sensing information to the display module, so that the display module outputs a corresponding torque value in a digital display manner.

Abstract: A torque wrench includes a tubular body. One end of the tubular body is connected to a driving head, and the other end has a grip. The tubular body includes a retaining unit, an elastic unit, a push rod, and an adjusting unit therein. One side of the retaining unit comprises a blind hole corresponding to the push rod for accommodation of an extension portion, and the other side is formed with a through hole for insertion of a thin rod portion, furthermore, the through hole has a diameter less than that of the blind hole, the retaining unit enables to bear the elastic unit. The retaining unit can be fixed at an end opening of the tubular body by a welding means or integrally formed with the tubular body, so as to achieve the effects of facilitating production assembly and reducing production cost.

Abstract: A slip type torque wrench has a driving head. The driving head includes a fixing seat and a guiding seat therein. The fixing seat is provided with a rolling member. The guiding seat is provided with a press member. The press member is biased by an elastic unit to abut against the rolling member. A peripheral side of the guiding seat is formed with a guiding slope. The driving head has a tightening hole. A tightening member is locked to the tightening hole. One end of the tightening member abuts against the guiding slope and pushes the guiding seat for tightening the fixing seat. Thereby, the rolling member and the press member stably operate to achieve the purpose of stabilizing the output torque.

Abstract: A torque wrench provided with illumination structure and indicated graduations includes a tubular body bored with an insert hole and an illumination hole. The tubular body is provided therein with a graduated ring having its outer circumferential wall provided with a graduation marked portion, with an interval kept between the graduation marked portion and the inner tube wall of the tubular body. A lens is disposed at a location corresponding to the insert hole, and a light-emitting element is installed at a location corresponding to the illumination hole. Thus, light emitted by the light-emitting element will first illuminate the graduation marked portion and thereafter the reflected light of the graduation marked portion will pass through the insert hole and pass out the lens, enabling a user to clearly read the graduation marked portion.

Abstract: A hand tool adapter capable of increasing output torque or rotational speed has a main body. The main body has a through hole. The through hole is provided with a first rotary seat and a second rotary seat. The through hole of the main body is provided with an annular toothed portion. The first rotary seat is provided with a plurality of gears to mesh with the annular toothed portion. The second rotary seat is provided with a gear axle to mesh with the gears. By the speed-changing principle of the planetary gear, the first rotary seat is selected as the input axle to increase the output rotational speed of the second rotary seat, or the second rotary seat is selected as the input axle to increase the output torque of the first rotary seat.

Abstract: An adjusting structure of a torque wrench includes an adjusting bolt orderly installed with a first nut, a second nut, a connecting ring and a third nut. The second nut has a polygonal groove correspondingly engaged with a polygonal projected ring of the connecting ring, so that the connecting ring has a thicker wall, compared to a conventional one, to step up its strength. Therefore, the connecting ring has a stronger structure to avoid disadvantage of easily breaking down happening in the conventional one.

Abstract: A safe and quick release device for a tool adapter includes a main body and a combination head. The main body has its front end axially bored with a combination groove with an open end. The combination groove has its opposite sides respectively bored with at least one position-limiting hole having its opposite ends respectively and annularly formed with a first position-limiting portion and a second position-limiting portion. A spherical position-limiting member is slidably disposed in the position-limiting hole and restrictedly positioned therein by the first and the second position-limiting portion. Thus, the position-limiting member is ready made, needless to be especially processed, can easily be in stalled for facilitating assembly and disassembly of the combination head, reducing processing cost.