| Popis: |
It is impossible to accomplish the task set by the development strategy of the timber complex of the Russian Federation until 2020 to increase timber harvesting up to 294 mln. m 3. without providing the timber harvesting enterprises with a complex of machines and equipment ensuring efficient timber harvesting, including in the severe weather conditions which prevail in most forest areas (weak soil, heavily waterlogged area, deep snow, etc.). It is advisable to use tracked machines on the waterlogged cutting areas, steep slopes, in deep snow, multi-storeyed wood, cross-country full of obstacles in the form of stubs, stones and fallen trees, where the performance and traction power of the wheeled vehicles are insufficient. The advantage of the tracked running gear is even more evident on the ice surface. This paper offers a model of loading of the transmission elements at controlled curvilinear motion of the tracked timber harvesting machine. This model is based on evaluation of the effect of the external and internal factors on the loading of the tracked machine transmission. The main loads in the transmission result from the external action of the ground contacting area during the vehicle movement. The caterpillar band tracks interact with the ground contacting area and translate force to the track drive sprockets. As a basis of a model to calculate loading of transmission elements at controlled curvilinear motion of the tracked timber harvesting machine was taken model of interaction between elements of the timber harvesting machine track ground contacting area. |
