| 摘要 |
<p>A versatile apparatus (2) for controlling the transmission of rotational forces between first and second rotatable members preferably takes the form of a clutch that can be activated by axially shifting an internal actuation member (140) through the introduction of either liquid or gaseous mediums. The clutch includes first and second transmission members (177, 281) which are rotatably mounted within a housing (5) and adapted to be attached to the first and second rotatable members respectively. A coupling assembly (226), preferably including first and second sets of axially spaced interface elements (252-254 and 274, 275), is interposed between the transmission members (177, 284) within the housing and axial movement of the actuation member (140) causes the interface elements (252-254 and 274, 275) to be frictionally engaged. In the preferred embodiment, the first and second sets of axially spaced friction interface elements (252-254 and 274, 275) are biased to a disengaged position by back-to-back arranged belleville washers (264-268), which maintain a constant disengagement force regardless of wear on the frictional surfaces thereof. To minimize associated manufacturing costs, the housing (5) is cast from aluminum. To assure that the clutch can work effectively with various fluid mediums, internal surfaces (19, 58) of the housing (5), against which seals (155, 170) of the actuation member (140) slideably abut, are coated with a hard coat anodize having a TEFLONTM and epoxy filler.</p> |
