| 摘要 |
A rotary impacting apparatus comprises rotary member (2) drivingly rotated about a rotational axis (O) within a casing (1). An impact member (11) is loosely held by the rotary member so as to be movable toward and away from the rotational axis within a limited range. A holder (14) mounted to the casing slidably supports a reciprocative member (16) to allow movement thereof toward and away from the rotational axis within a limited range. The reciprocative member has a contact surface (16c) which interferes with the impact member rotating about the rotational axis when the reciprocative member is positioned closest to the rotational axis. |
