Abstract
The work highlights the issues of operation of a replaceable caterpillar propeller for a tractor of traction class 5, an analysis of the design of wheeled-caterpillar mobile power facilities is carried out, its positive and negative aspects during operation are described, its detailed justification is given in comparison with wheel propellers, the definitions of normal reactions are drawn up equations of moments, acting relative to the points of application of these reactions on the front and rear propellers, the results of calculating the distribution of pressures along the support branch of the caterpillar bypass are presented.
Highlights
The position of the pressure center determines the point of application of normal reactions to the track unit. The distribution of these reactions depends on the design of the track unit and soil conditions in which the tractor operates
When the tractor is moving on a horizontal section (a=0) with a nominal traction load (Rcr=6750) on the stubble, the normal reactions on the front and rear track units are occurred, respectively
Since the track unit is connected to the tractor frame with hinges and has no other connections with it, and the reaction is always perpendicular to the support base in this hinge, with a symmetrical position of the rollers relative to the specified hinge, the load on each roller will be the same and will be for the front and rear track units, respectively: in static under load
Summary
- since the crawler unit has a hinged connection with the tractor frame and has no other connections with it, the reaction in this hinge is always perpendicular to the supporting section of the track, with a symmetrical track, the load on all the supporting rollers is the same, which ensures a uniform distribution of specific pressures on the supporting base; - the center of pressure always coincides with the center of the supporting surface of the crawler chain, since this unit is connected to the tractor body with hinges and the reaction is perpendicular to the support base;
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