F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/264
F16H 7/12 (2006.01)
Patent
CA 1258782
ABSTRACT In a belt tensioning device comprising a fixed structure, a pivoted structure mounted with respect to the fixed structure for pivotal movement about a first axis between first and second limiting positions, a belt engaging pulley rotatably carried by the pivoted structure for rotational movement about a rotatational axis parallel with the pivotal axis, a spring acting between the fixed and pivoted structures for resiliently biasing the pivoted structure to move in a direction away from the first limiting position toward the second limiting position so as to tension a belt engaged by the pulley, and a damping mechanism for damping the pivotal movements of the pivoted structure about the pivotal axis; the improvement which comprises the damping mechanism including: 1) a stack of damping elements having interengaging pairs of surfaces disposed transversely with respect to the pivotal axis so as to be slidable with respect to one another in spaced planes of revolution about the pivotal axis; 2) the stack including a first plurality of damping elements and a second plurality of damping elements which are disposed within the stack in alternate positions with respect to the damping elements of the first plurality; 3) a mechanism for connecting the first plurality of damping elements with the fixed structure, (a) against movement in the rotational planes of the interengaging surfaces thereof and (b) for movement relative to one another in the axial direction of the pivotal axis; 4) a mechanism for connecting the second plurality of damping elements (a) for movement with the pivoted structure about the pivotal axis so that the interengaging surfaces thereof will move in the rotational planes thereof with the pivoted structure and (b) for movement relative to one another in the axial direction of the pivotal axis; and 5) a mechanism for supporting one end element of the stack against movement in an axial direction away from the stack so that an axial force component acting in the direction applied to the opposite end element of the stack will cause the pairs of interengaging surfaces of the stack elements to move together and create a predetermined sliding friction therebetween when the pivoted structure is moved with respect to the fixed structure about the pivotal axis so as to provide a predetermined damping of such movement.
512312
Gowling Lafleur Henderson Llp
Litens Automotive Partnership
LandOfFree
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