| 摘要 |
A hydraulic torque impulse generator comprises a drive member (10) drivingly connected to rotation motor and including a cylindrical fluid chamber (11) which is partly defined by a circumferential wall (23) of a non-constant radius, an output spindle (12) rotatably supported in a coaxial relationship with said drive member (10) and comprising a rear portion (13) which extends into said fluid chamber (11) and which has two radial slots (29, 30) in which seal rollers (27, 28) are radially movable. The drive member (10) has a rear end wall (20) which is formed with a forwardly extending hub portion (25) on which is rigidly attached a cam element (26) for positive engagement with the seal rollers (27,28) to move the latters outwardly toward the fluid chamber wall (23) during rotation of said drive member (10) relative to said output spindle (12).
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