| 摘要 |
FIELD: agriculture. ^ SUBSTANCE: draft hitch for gathering of brush wood contains rotary frame from hydrocylinders with directing with shock-absorbers fixed on it, collecting teeth with clamps, board-protection. Collecting teeth and guide are executed by straight lines, cylindrical and are located to soil surface under an angle alpha<alphalim, where alphalim - limit angle. Contact roller is pivotally connected on free end of each collecting tooth, with radius size r corresponding to condition: where RK - resistance to rolling coefficient of contact roller on stub, mm; fn - resistance to rolling coefficient of collecting tooth which does not have contact roller touching stub; rineff - inefficient radius of contact roller, mm. The collecting teeth having contact roller on the end are located at an angle to the soil surface: where r - radius of contact roller, mm; RK - resistance to rolling coefficient of contact roller on stub, mm; fn - resistance to rolling coefficient of collecting tooth with the guide; alphalim - a limit angle. Longitudinal groove of the semicircular form is executed on the back side of each collecting tooth for prevention of collecting teeth rollover in the guide. From the back side of each guide the aperture with carving which is combined with groove on collecting tooth is executed. Blocking ball which part is placed in the given aperture and other part in groove of collecting tooth is fixed by means of fixing bolt in an aperture made in the guide. ^ EFFECT: facilitation of a device operating mode at avoidance of obstacles by collecting teeth and increase of durability and reliability of collecting teeth. ^ 9 dwg |
