H3-SV-19-A neupex Helical speed reduction gearboxes H3

Flender/Flender Gear Units/Helical speed reduction gearboxes H3

ch cutters with /H1.2-mmstroke are used in mowers, whereas those with /H1.6-mmstroke are used in trailed combines. But in the medium-cuttype cutter-bar, the distance between the adjacent guards is more thanthat of low-cut type, but less than that of standard type. This type of cutter with /H1.2- mmstroke is used in mowers of foreign manufacture. The reciprocating-action cutters with stationary countercutting edges make to- and-fro motions between the successive guards when the cutting of crop stems occurs.The included angle between the cutting edges is near 3 , and this angle is less than normal for wheat crop and increases for serrated edges (3,. The knife edges of sucha cutter-bar derive reciprocating motion through crank mechanism and make forward movement during eld operation. Relative to ground level, any point on the knife edge will, therefore, make curvilinear path. It is possible to obtain the knife edges path of any selected point on the edge graphically if the crank radius ror the knife edge stroke sand distance ltraveled by the machine in half revolution of crank, are known. The curvilinear path traced by the knife edges is steep for standard type, followed by low-cut and medium-cuttype cutter-bar because of the wide spacings of consecutive knife edges of the latter. This phenomenon suggests use of the low value of forward 7 Datta travel per cut (feed rate) to stroke length ratio for standard type to reduce the uncut zone. 2.5.2.1 Cutter-Bar Components and Operation Harvesting machines employing any of the three types of cutter-bar; namely, conventional, low-cut, and medium-cuttype with countercutting edge, are provided with the following essential components. 1. Reciprocating motion . Trapezoidal-shaped knife/sliderb. Knife back riveted with knife section . Part length of pitman 2. Rotary motion . Crank and crankpinb. Balancing counterweightc. Telescopic shaft and PTOd. Part length of pitman 3. Stationary . Main bar (beam). Wearing platec. Knife gua