Abstract
Links play an important role in hitching of implement to a tractor. They must withstand forces that are transmitted between tractor and implement. In modern heavy duty tractors, some type of lower link mounted force transducer is used to measure draft force. Therefore, the lower link needs to have such dimensions that stresses developed by draft force be well below of its material yield strength to safeguard any permanent set, in the meantime, avoiding high material as well as manufacturing costs might encounter due to the unnecessary large dimensions of the link. In this study, the lower link of a three-point hitch of new heavy duty ITM1500 tractor developed in Iran Tractor Manufacturing Co., was analyzed with regards to both static and dynamic conditions using finite element method. The 3-D link was modeled in Solid Works environment while Cosmos Works software was used for finite element analysis. Finally, optimum dimensions of the lower link was found with respect to available raw material and draft forces involved.
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