Belden Universal Joints - 26 Pages
Quality, Precision+Reliability Belden Universal Joints for Military Applications Needle Bearing Drive Shaft Assembly for Multi Role Military Vehicles Belden Inc. was contacted to supply a universal joint drive shaft assembly to connect the diesel engine and the compressor for the air conditioning unit of a multi-role armored vehicle. The customer originally specified a standard 32mm OD needle bearing drive shaft with stainless steel yokes and a quick release hub feature for the initial testing. The entire vehicle was placed in to a climate chamber to replicate the possible environmental elements the armored vehicle could encounter in the various regions of the world. The tests proved to be extremely demanding on the universal joint drive shaft resulting in premature failure. Belden evaluated the application in the field and suspected that a combination of an undersized joint that could not handle the torque and rpm of the diesel engine and the harsh temperature and operating environment inside the vehicle's engine compartment contributed to the drive shaft failure. Belden was further challenged by the space limitations for a more robust joint. The distance was very short and a telescoping feature was mandatory for the assembly. The severe space constraints limited the possible bearing size. The redesigned drive shafts now include a larger, heavy duty bearing that is sealed and equipped with a lubricant that can handle a greater range of operating temperatures. The bearing seal was improved to better retain the lubrication during longer periods of extreme operation. The stainless steel yokes incorporate a custom profile and hub, and the Quick Release feature.
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