Timing belt tensioner with damped constant spring tensioning and

Details Timing belt tensioner with damped constant spring tensioning and Timing belt tensioner with damped constant spring tensioning and

1984-12-07

1986-04-22

Leppink, James A.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Guide roll mounted for movement of its axis along arcuate...

474135, F16H 712

Patent

active

045839620

ABSTRACT:
A timing belt tensioning device comprising a fixed structure having a spring pressed pivoted structure mounted thereon for pivotal movement about a first axis between first and second limiting positions. The pivoted structure carries a timing belt engaging pulley for rotational movement about a second axis parallel with the first axis. A one-way clutch mechanism is provided for permitting pivotal movement of the pivoted structure in a direction toward a second limiting position and for limiting the pivotal movement of the pivoted structure in an opposite direction toward the first limiting position beyond a predetermined distance measured from the nearest position of the pivoted structure to the second limiting position. The predetermined distance has a maximum dimension such as to prevent loosening of the timing belt engaged by the pulley sufficient to allow disengagement of a tooth thereof with a tooth of a timing pulley and a minimum dimension such as to accommodate normal operating low amplitude movements and thermal expansion during operation. A damping system is provided for damping the operating movements of the pivoted structure permitted by the one-way clutch mechanism.

REFERENCES:
patent: 4392840 (1983-07-01), Rodocaj
patent: 4472162 (1984-09-01), Hitchcock
patent: 4473362 (1984-09-01), Thomey et al.
patent: 4521208 (1985-06-01), Doveri

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