| 摘要 |
FIELD: transport.SUBSTANCE: tiller comprises frame with trailer supported by two rear pneumatic wheels. Fenders are articulated with the frame while packing sections are staggered with frontal overlap. Packing sections consists of frames with bearing assemblies and shafts. Two pneumatic wheels are fitted on the frame via levers secured to the frame from below and interconnected by the beam. Fenders are arranged at the frame to displace upward. Wheels are fitted at outer ends of the fenders. Fenders are connected with the frame via suspensions and lifting levers. Lifting levers are connected via hydraulic cylinders with levers of the wheels. Frame lifting relative to pneumatic wheels is limited by posts with the frame retaining pins at transport position. Packing section shafts are equipped with helical strips of width a secured at spacing C and pitch t to make angle ? with generatrix describing the cylindrical surface of packing section in diameter D. Inclination of helical strip projection on whatever surface extending through section axis to their axes makes ?. Section frames are mounted on the frame and fenders via parallelogram mechanisms and turn-buckles and crossbars to make packing sections located behind the fenders to cover the wheels fitted at edges of said fenders. All packing sections are located at angle ? between tiller direction and perpendicularly to section axes diverted to the side of angle ? for complete compaction of field under crop. Angle ? is defined by relationship:where n is the number of helical strips in packing section. H=H-H, where His maximum depth of packed soil above crops; His minimum admissible depth of soil packing. Maximumand minimumthickness of additionally ground and loosened soil above packed soil are defined by expressions:where His sawing depth while.EFFECT: higher quality of tillage.5 dwg |
