| 摘要 |
PURPOSE: A hitting torque regulating device of a hydraulic torque wrench is provided to improve the accuracy of magnitude of hitting torque in forward and reverse rotations and reducing a generating frequency. CONSTITUTION: A hitting torque regulating device of a hydraulic torque wrench comprises an operating oil path(11b), a valve body(11d), an oil chamber. A liner(7) becomes a high-pressure chamber(H) and low-pressure chamber(L) when a hitting torque generates. The operating oil path is passed through the inner part of the liner. The valve body is arranged in the operation oil path, thereby biasing in a direction where the operating oil path is opened toward. The oil chamber is interconnected by flow paths formed in a blade insertion portion of a spindle(8) and a liner cover(7a). |
