Machine element or mechanism – Mechanical movements – Grip units and features
Patent
1979-01-22
1981-07-28
Braun, Leslie
Machine element or mechanism
Mechanical movements
Grip units and features
74208, F16H 1516, F16H 1300
Patent
active
042803691
ABSTRACT:
A ball/ramp force producing system is provided for use in infinitely variable ratio torque transmissions of the type which transmit torque by means of rolling friction contact between pairs of traction surfaces. The ball/ramp system applies a thrust force to a pair of conical traction elements to force the elements into frictional engagement with their respective other traction surfaces. The system includes a collar assembly splined to a support shaft with conical traction elements mounted on the shaft on each side of the collar assembly. Complementary helical ball/ramps are formed on each side of the collar assembly and on the respective cone bases with force transmitting balls located in the ramp sets. Rotation of the collar assembly or the traction elements with respect to one another causes the traction elements to advance in opposite axial directions along the shaft to initiate and maintain engagement between the respective traction surface pairs. The thrust force generated by the ball/ramp system is proportional to the torque transmitted by the transmission.
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Braun Leslie
Vadetec Corporation
Ziems Robert F.
LandOfFree
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