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PROMISING DESIGN OF A RECUPERATIVE SPRING-HYDRAULIC FIFTH WHEEL TRAILER TRUCK WITH A SEMITRAILER

The relevance of the development and use of new promising designs of fifth wheel coupling devices for forestry tractors with semitrailers, aimed at ensuring the simplicity of the design of fifth wheel coupling devices, their high reliability, safety in work, reducing metal consumption and the possibility of accumulating and using energy that is not efficiently dissipated into the environment, is substantiated. The operating conditions of timber tractors with semitrailers for timber removal are described. The main transients occurring in the fifth wheel coupling and contributing to the emergence in it of large dynamic loads from the inertia of the mass of the semitrailer are given. A promising design of a recuperative spring-hydraulic fifth wheel trailer truck with a semitrailer is proposed, which allows to reduce the energy losses that occur in the fifth wheel trailer, to accumulate and is useful to use in the hydraulic drive of the manipulator during the loading and unloading of timber. The device and operation of the regenerative spring-hydraulic fifth wheel coupling are described. It was revealed that the use of the proposed device will improve ride smoothness and reduce fuel consumption of the forest tractor with a semitrailer, as well as provide more favorable conditions for the driver to work.