Temperature sensitive type fluid fan coupling apparatus

Details Temperature sensitive type fluid fan coupling apparatus Temperature sensitive type fluid fan coupling apparatus

1991-06-18

1992-06-30

Braun, Leslie A.

192 clutches and power-stop control

Clutches

Fluent material

192 82T, F16D 3100

Patent

active

051254913

ABSTRACT:
Herein disclosed is a temperature sensitive type fluid fan coupling apparatus which comprises: a sealed container including a casing and a cover, the container being borne through a bearing on a rotating shaft, which has a drive disc fixed to its leading end, and having a cooling fan attached to its outer circumference; a partition dividing the inside of the sealed container into an oil sump and a torque transmission chamber housing the drive disc, a dam formed in a portion of such an inner circumference of the sealed container as faces the outer circumference of the drive disc, on which the oil is collected at the time of rotation; a circulation passage communicating with the dam and leading from the torque transmission chamber to the oil sump; a valve member fitted in the oil sump for opening an outflow adjusting orifice leading to the torque transmission chamber, if the ambient temperature exceeds a preset value, and closing the same if below the preset value; and a temperature sensing element mounted on the front face of the cover and associated with the valve member if deformed in accordance with the temperature change. Thus, the effective contact area of the oil at a torque transmission gap, which is formed between the opposed wall faces of the drive disc and the sealed container in the vicinity of the outside, is increased or decreased to control the torque transmission from the rotating shaft at the drive side to the sealed container at the driven side. The opening of the output adjusting orifice to be opened or closed by the valve member is formed to intersect the partition generally at a right angle.

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