| 摘要 |
An arrangement for decreasing the strain on a rivet joint of the top wheel in a motor saw. Lateral forces in consequence of unvoluntary jamming or twisting of the saw chain by its surrounding of the top of the sword cannot be totally avoided, which often gets the rivet joint (17) of the top wheel loose. In order to avoid such a thing it is suggested to provide a releasing slot (19) which separates the chain guiding portion of the outer sheets (10,11) of the saw sword from the riveted portion forming the inner roll bearing surface of the top wheel, which slot is extending through at least 180 DEG thereof.
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