| 摘要 |
A rotary blower (26) including a pair of shafts (70,56) on which are mounted a pair of rotors (28,29), input to the first shaft (70) being by way of an input pulley (76;108;201). The first shaft (70) has a forward terminal portion (72) extending forwardly of a first timing gear (60) to a location disposed within the input pulley. A torsion damping means is associated with the input pulley (76;108;201) and includes a resilient means (94;124;213) which resists relative rotation between the input pulley and the terminal portion (72) of the first shaft. The torsion damper also includes means (88,90,92;118,122;207,211) for limiting the relative rotation of the input pulley and the first shaft. The disclosed arrangement provides a more compact, less expensive input portion of the blower which eliminates the need for the conventional "third shaft" and its associated bearings.
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