| 摘要 |
Methods and means for testing toothed flexible power transmission members, such as positive drive belts and flexible couplings, by simulating the effects of torsional vibrations on the teeth, are disclosed. In a test, the teeth at one part of the member being tested are anchored against movement while the teeth at another part are transversely vibrated. A belt-testing device designed for this purpose includes a rotatable toothed pulley and at least one stationary toothed pulley around all of which the belt being tested is trained under tension, and motor-driven cam or crank means for oscillating the rotatable pulley about its axis. Correspondingly, a coupling-testing device includes a stationary toothed hub and a rotatable toothed hub onto which the respective opposite end regions of the coupling being tested are fitted, and motor-driven cam or crank means for oscillating the rotatable hub about its axis. Indications of belt or coupling quality may be obtained with the aid of strain gages affixed to the test specimen at suitable locations, by counting the number of oscillations or the time to failure, or otherwise, in ways well known to the art. This abstract is not to be taken either as a complete exposition or as a limitation of the present invention, however, the full nature and extent of the invention being discernible only by reference to and from the entire disclosure.
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