| 摘要 |
A hydraulic torque impulse mechanism comprising a rotatively driven drive member (10) which has a concentric fluid chamber (12) as well as radially acting cams (25, 26, 28), an output shaft (16) which extends into the fluid chamber (12) and which has two radially extending cylinder bores (18, 19) communicating with each other via a central high pressure chamber (23), two oppositely disposed piston elements (20, 21) reciprocable in the cylinder bores (18, 19) by the cams (25, 26, 28), and two valve chambers (45, 46) each comprising a number of fluid communicating openings (50) interconnecting the high pressure chamber (23) and the drive member fluid chamber (12), and a pressure responsive leaf spring valve element(51) for blocking fluid communication through these openings (50) as the pressure difference between the high pressure chamber (23) and the fluid chamber (12) exceeds a certain level.
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