Differential-speed-dependent coupling
AssigneeGKN Viscodrive GmbH
InventorGeorg Kwoka
Life of this patent
Estimating the term…
Abstract
An automatic coupling has two parts supported inside one another, and which are rotatable around a common longitudinal axis. The parts form an annular chamber. An annular piston axially divides the annular chamber into two compartments. The annular piston is connected to one of the parts in a rotationally fast and axially movable way and there is formed a shear channel which extends helically relative to the longitudinal axis. The shear channel connects the two compartments separated by the annular piston to one another. The end faces of the annular chamber are formed by the other one of the parts, with the annular piston being able to support itself on the end faces of the annular chamber while generating braking forces.
Claims12
An automatic coupling comprising:
- two parts supported one inside the other, said two parts rotatable around a common longitudinal axis and which form an annular chamber filled with a highly viscous fluid, for the purpose of generating a locking effect between the two parts when said two parts rotate relative to one another;
- wherein,
- said annular chamber has an annular piston which divides said annular chamber into two compartments and which, in said annular chamber is connected to one of said parts in a rotationally fast and axially displaceable way by means of driving elements, and which, by means of a cylindrical outer face closely fits into a cylindrical counter face of the other one of said parts and wherein between said outer face and said counter face there is provided at least one shear channel which extends helically relative to said longitudinal axis and which connects said two compartments to one another;
- and wherein end faces of said annular chamber are formed by the other one of the parts and said annular piston by means of end faces is able to engage at least indirectly the end faces of said annular chamber for the purpose of generating braking forces.
Dependencies are inferred from the claim text.