| 摘要 |
A support assembly ( 62 ) for an output shaft ( 20 ) of a jigsaw is disclosed. The support assembly ( 62 ) comprises a support housing ( 64 ), a lower bearing ( 102 ) arranged in the support housing and adapted to support an output shaft ( 20 ) of the jigsaw for reciprocating movement of the output shaft along a first axis relative to the lower bearing and to substantially prevent movement of the output shaft ( 20 ) relative to the lower bearing ( 102 ) in a direction transverse to the first axis, and a blade support roller ( 110 ) adapted to abut a jigsaw blade ( 18 ). A support arm 108 supporting the blade support roller ( 110 ) is adapted to pivot to a limited extent relative to the lower bearing ( 102 ) about at least one second axis transverse to the first axis to minimise the extent to which a force applied by the jigsaw blade ( 18 ) to the blade support roller ( 110 ) during cutting action causes the lower bearing ( 102 ) to apply a turning moment to the output shaft ( 20 ) about an axis transverse to the first axis.
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