| 摘要 |
FIELD: agricultural engineering, in particular, cultivation of stubbly soil. SUBSTANCE: working tool has tine, conical chisel with rounded apex and rods oriented to chisel axis. Chisel base and tine junction portion has concave-curved surface. Chisel is formed from two detachable parts and provided with rods having working and mounting portions. Rods are positioned at an angle to chisel axis in plane of joining of detachable parts. Conical front detachable part of chisel is made in the form of wear-resistant point and rear part of chisel is formed as truncated elliptical cone. Base of chisel front part has threaded shank, supporting cone, shaped annular channel and supporting portion formed as part of conical surface. Chisel rear part disposed on smaller base of elliptical cone has threaded opening, conical face and inclined channels for retaining rods in predetermined position. Channels are inclined to chisel axis at an angle equal to that of cores. Contact portions of rods are disposed in inclined channels of chisel rear part and in annular channel of base of chisel front part and fixed by its supporting cone. Annular channel in base of chisel front part has cylindrical wall joined with cylinder base and conical surface of supporting cone. Threaded rod is disposed on supporting cone. Angle of inclination of rod relative to chisel axis is preferably 35-45 deg. Sharpening angle of rod working part is 20-40 deg. Rod diameter is 6-8 mm. Width of inclined channels is equal to diameter of rod. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 7 cl, 8 dwg
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