| 摘要 |
<p>A striking body (16), which is often called a "tup", is mounted in a housing (10) so as to be capable of reciprocation therein to transmit successive impacts to a tool, such as a chisel (20) or a hammer, optionally by way of an anvil (18). A cam form (14, 24) rotated by a motor (12) or other drive mechanism serves repeatedly to displace the striking body (16) in a direction away from the tool (20) against bias of elastic means (30). Each time, upon release of the striking body (16) from active cam displacement, its striking blow is powered by release of energy from the elastic means (20) along with acceleration of the striking body itself.</p> |
