초록 ▼

A bidirectional brake for use in a drive train to permit a rotary driving element to drive a rotary driven element but not the reverse including a rotary input shaft and a rotary output shaft coaxial with the input shaft. At least one rotatable brake element is carried by the output shaft and is rot

A bidirectional brake for use in a drive train to permit a rotary driving element to drive a rotary driven element but not the reverse including a rotary input shaft and a rotary output shaft coaxial with the input shaft. At least one rotatable brake element is carried by the output shaft and is rotatable therewith and at least one non-rotatable brake element is mounted in proximity to the rotatable brake element and engageable therewith. A spring normally urges the rotatable brake element away from the non-rotatable brake element and a limited lost motion connection is established between the shafts. A cam is responsive to relative rotary movement between the shafts for moving the rotatable brake element against the spring towards the non-rotatable brake element and a drag brake is operative associated with the input shaft.

대표청구항 ▼

A bi-directional brake for use in a drive train to permit a rotary driving element to drive a rotary driven element but not vice versa comprising: a rotary input shaft including a recess at one end; a rotary output shaft coaxial with said input shaft and having an end journalled in said recess; firs

A bi-directional brake for use in a drive train to permit a rotary driving element to drive a rotary driven element but not vice versa comprising: a rotary input shaft including a recess at one end; a rotary output shaft coaxial with said input shaft and having an end journalled in said recess; first axially extending splines associated with said input shaft; second axially extending splines associated with said output shaft; first and second, axially spaced, cam elements slidably received on said first splines and including ball ramp cam means at their interface; means coupling said second cam element to said rotary output shaft; a first fixed brake element in proximity to said first cam element oppositely of said second cam element; a first rotary brake element carried by said first cam element oppositely of said second cam element defining an interface and engageable with said first fixed brake element for providing a drag on said input shaft via said first cam element and said first spline; a brake pack associated with said second cam element including a plurality of second rotary brake elements; slidably received on said second splines and interleaved with a plurality of second fixed brake elements, said brake pack adapted to be compressed by axial movement of said second cam element; said first spline and said first and second cam elements defining a limited lost motion connection between said shafts; and means for biasing said second cam element toward said first cam element, and thus said first brake elements into engagement with each other.