| 摘要 |
FIELD: agricultural engineering. ^ SUBSTANCE: bush cutter has basic tractor, telescopic boom with telescope, hydraulic cylinder for extending said telescope, and working tool formed as disk saw fixed at end of telescope. Telescopic boom is fixed on handle of hydraulic manipulator mounted on basic tractor. Working tool of bush cutter is driven through hydraulic motor and is equipped with cutting height adjusting device comprising cylindrical body and flange, between which body and flange disk saw is fixed. Upper part of body is rigidly joined with cover fixed on shaft of hydraulic motor. Two symmetrically arranged slots are formed in cylindrical body. Guiding retainers located within said slots are rigidly connected to base positioned for movement within cylindrical body. Return spring is placed between base and cover. On the outside of cylindrical body there is ring fixed on guiding retainers for engagement with electric end switch fixed for movement by means of bolted connection within slot provided in column rigidly connected to telescope. Indicator is fixed at electric end switch, and ruler is located at column. Hydraulic cylinder is rigidly fixed on telescopic boom. Plate-like base with indicator is fastened on stem of hydraulic cylinder. Such construction prevents disk saw from contacting with ground surface. ^ EFFECT: increased efficiency and quality of work performed using bush cutter owing to and improved cutting conditions. ^ 3 dwg
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