Caculation And Research On Some Issues Of Crawler Driving Mechanism

Crawler unit has been widely used in the military vehicle and engineering machinery. Crawler unit, which is one of the most significant parts of the vehicle, is the load-bearing and driving chassis of the automotive. As a result, the property of the crawler unit is in relation to the service performance and travelling behavior of the vehicle. It requires that the crawler unit has reliable working behavior to ensure that the whole vehicle has the superb stability, low unit pressure of ground and well trafficability and maneuverability. It is quite significant to research the crawler unit.Based on elaborating the working principle of the crawler unit, the paper analyses every part structure and selection ground, and then analyses and compares the characteristic of the transmission type and arrangement fashion of the tradition system. According to the practical work feature, the paper applies the track driving theory to calculate the force power parameter of the travelling system in order to supply reasonable data for design.In order to obtain the maximum value of gravity shift, it needs to make sure the calculation expression of track unit pressure of ground in different gravity shift. Furthermore, this paper analyses the each factor affecting the track subsidence depth, and the relationship of the track unit pressure of ground and subsidence depth. It is better to consider the unit pressure of ground and subsidence depth at the same time to assure the machine has the superb trafficability.Based on the upon analyzing and researching and practical work feature and correlation theory of some machine, this paper aims at different driving condition and proposes calculation mode of the maximum pressure of track border on the basis of the theory that is the distribution of track reaction force is similar with the distribution of unit pressure. And it is the first time to apply three moment equation to reckon the reaction force of each track support roller. That provides foundation for strength calculation of track in various work condition.