Patent ID: 7765900

Claim:
A torque wrench, comprising: an operation bar having a first end provided with a mounting sleeve and a second end provided with a drive portion; a hollow handle mounted on the mounting sleeve of the operation bar and having an end portion having an inner wall provided with a first toothed portion and a plurality of positioning grooves; a first bushing located in the mounting sleeve; a second bushing located in the mounting sleeve; a linking rod located in the mounting sleeve; and an adjusting unit mounted on the handle and including: an adjusting knob connected to the linking rod, movable relative to the end portion of the handle and having an outer wall provided with a second toothed portion detachably engaged with the first toothed portion of the handle, an inner wall including a through hole defined therein and a receiving chamber in communication with the through hole, and a positioning block detachably locked in one of the positioning grooves of the handle to releasably lock the adjusting knob of the adjusting unit onto the end portion of the handle; a threaded retaining member screwed onto the linking rod; an elastic member located on the linking rod and biased between the threaded retaining member and the adjusting knob to push the adjusting knob toward the mounting sleeve and the end portion of the handle; a washer located on the linking rod and located between the threaded retaining member and the elastic member; and an end cap located on the adjusting knob to cover the threaded retaining member, the washer, the elastic member and the linking rod; wherein the threaded retaining member, the washer and the elastic member are located in the receiving chamber of the adjusting knob; wherein the end cap is located on an end portion of the receiving chamber to close the receiving chamber; wherein the linking rod includes: a first end extending into the receiving chamber via the first bushing and the through hole for positioning the elastic member and the washer; and a second end extending through the second bushing.