| 摘要 |
<p>A tool assembly (10), for example a hydraulic or pneumatic hammer assembly, comprises a housing (11) defining a chamber (16), a removable reciprocating work tool (20) arranged in the chamber, and a tool retention member (80) having an aperture through which the work tool extends. The housing (11) includes an engaging means (50) which permits the engagement of the tool retention member (80) with the housing by relative rotation of the tool retention member and housing. The work tool (20) is provided with retention means (44) such as a retaining flange which prevents the removal of the work tool from the housing when the tool retention member is engaged with the housing. The invention eliminates the need for a retainer pin, thereby allowing the work tool to rotate, avoiding wear, increasing tool life and simplifying tool replacement.</p> |
