Hydraulic mechanical stepless transmission and steering device for multi-section tracked vehicle

The invention relates to a hydraulic mechanical stepless transmission and steering device for a multi-section tracked vehicle. The hydraulic mechanical stepless transmission and steering device comprises an input system, a hydraulic system, a speed change system, a differential system, an output system and a section position switching system. The advantages of hydraulic transmission and mechanical transmission are combined into a whole, and the tracked vehicle transmission and steering system which is compact in structure, capable of achieving a large transmission ratio, large in transmission power, high in efficiency and capable of achieving stepless speed regulation is provided. In the in-situ steering working condition, multiple modes such as hydraulic steering, mechanical steering and hydraulic and mechanical double-flow steering can be achieved. 本发明涉及一种多段式履带车辆液压机械无级传动与转向装置，包括输入系统、液压系统、变速系统、差速系统、输出系统和段位切换系统。本发明将液压传动和机械传动的优点结合为一体，提供了一种结构紧凑、可实现较大传动比、传动功率大效率高且可以无极调速的履带车辆传动与转向系统；在原地转向工况中，本发明可实现液压转向、机械转向、液压机械双