Group of shaft-planetary transmission schemes for transport and traction vehicles

The relevance of using shaft-planetary transmissions as part of the chassis of transport-technological, road-building and forestry wheeled and tracked vehicles is substantiated. The concept of the shaft-planetary transforming mechanism G33CM, currently used on Scania trucks, was adopted as a prototype. The prospects for the use of such transmissions are considered, areas of transport engineering that have the necessary technological base and have accumulated experience in the design, production and operation of related structures are indicated. A typical transmission circuit is proposed, on the basis of which it is possible to construct a tree of family circuits that differ in the number of operating modes. Principles for constructing kinematic diagrams of a family of transforming mechanisms for such transmissions and calculation formulas for estimating the gear ratios of the shaft and planetary blocks of the transforming mechanism are proposed. Attention is paid to the principles of slip control in disc friction control elements based on the technology of pulse-width modulation of pressure in the hydraulic route of the disc friction control element drive and links to publicly available scientific publications on this issue are provided. Using the example of one of the options for combining the kinematic diagrams of the main (shaft) and additional (planetary) gearboxes, the possibility of implementing a range of gear ratios characteristic of the transforming mechanisms of modern Russian tractors of the Kirovets family is considered. It is shown that the principle of constructing circuits and assessing the possibility of implementing given gear ratios can be extended to other transport and transport-traction machines. A bibliographic list is provided that allows you to analyze the key techniques and technologies necessary for the practical implementation of the considered concept.