| 摘要 |
A rotary fluid coupling device is provided of the type including a first rotatable coupling assembly (13) comprising a housing member (15) and a die cast cover member (17). An input coupling member (11) is disposed in a fluid operating chamber (33) and cooperates with an adjacent surface of the cover member (17) to define a viscous shear space therebetween. When the shear space is filled with viscous fluid, torque can be transmitted from the input to the output, such torque transmission resulting in the generation of a substantial amount of heat. The cover member (17) includes a plurality of cooling fins which are divided into a plurality of regions (61). Within each of the regions (61) is a radially-extending cooling fin (63) and a plurality of full-length, parallel cooling fins (65). Also included within each region (61) is a plurality of shorter cooling fins (67) and (69) which are also parallel to the radially-extending cooling fins (63). The parallel fin pattern results in greater total cooling fin length within a given finned area, thus substantially improving the heat dissipation capability of the cover member (17) and the torque-transmitting capability of the coupling device.
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