LOGGER RUNNING GEAR Russian patent published in 2013 - IPC B62D55/08 B60B35/10 B62D21/14 

FIELD: transport.

SUBSTANCE: invention relates to logger running gear, primarily, with crawler propulsors to be used in forestry. Proposed system comprises bearing frame 1 to carry rotary support round table 2. Crawler propulsor bearing beams 3, 4 are articulated with bearing frame by device designed to change the running gear track. Drive sprockets with their drives, wheels and track assemblies 5, 6 with their tensioners are coupled with sad beams 3, 4. Said device designed to change the running gear track comprises hinges 7, 8 to connect one ends of bearing beams 3, 4 with frame 1 and opposite ends with guides 11, 12 by sliders 15, 16. The latter are fitted in said guides 11, 12. One end of said sliders is articulated with beams 3, 4 while opposite end is articulated with beam drives 13, 14, for example, hydraulic cylinders. Axes of symmetry 19, 20 of guides 11, 12 are directed in radii the length which equals the spacing between axles 9, 10 and 21, 22, respectively.

EFFECT: better cross-country capacity and higher efficiency.

2 cl, 1 dwg