RU189280U1 - Cutter blade segment - Google Patents

Abstract

The knife segment of the cutting apparatus relates to the field of agricultural engineering and can be used in the design of the cutting apparatus of the combine harvesters and mowers. The segment is made in the form of a rectangular plate with a semicircular cut in the middle part, which forms curved blades located in the same plane. The proposed design of the knife segment of the cutting unit allows to reduce the power to drive the device and improve the quality of the cutting unit. 6 Il.

Description

The utility model relates to agricultural engineering, in particular to the segment-finger cutting devices of mowers and reapers of agricultural harvesting equipment and can be used in cutting machines of harvesting machines.

Many agricultural machines use a segment-finger cutting unit design with segments in the form of trapezoidal plates with sharp side edges, described in the book by V.M. Khalansky and I.V. Gorbachev “Agricultural Machines”, Moscow: Kolos, 2004, p. 250. A significant disadvantage of this segment is the poor-quality cut of the plants and the loss of the uncut mass of the harvested crop. This disadvantage applies to all knife segments of a triangular (trapezoidal) shape.

The design of the cutting apparatus was taken as a prototype (patent No. 169876 of the cutting machine of the harvesting machine, IPC: A01D 34/13, publ. 04/04/2017, Bull. No. 10. The design of the cutting unit provides that the body of the segment is made in the form of a rectangular plate with a triangular plate or trapezoidal) cut in the middle part, which forms cutting straight edges located in the same plane. Neighboring knife segments are in contact with each other along the entire side surface and are arranged with the orientation of the cutting edges alternately up and down.

The proposed design of the knife segment of the cutting unit allows to unify the details in the design of the cutting unit with open fingers and increase the reliability of its work.

The disadvantages of this design include the high energy intensity of the cutting process of plant stems.

From the analysis of the current level of technology, it is revealed that a technical problem in this area is an insufficient arsenal of tools used in cutting machines of harvesting machines to reduce the energy intensity of the process of cutting plant stalks.

The technical result of the proposed device is to reduce energy costs for the drive of the cutting unit while ensuring the quality of cutting by improving the process of pinching the stems when they are cut.

This result is achieved due to the fact that the knife segment of the cutting apparatus, consisting of a body with holes for attachment to the knife strip, and a cutout with cutting edges, the middle part of which is made in the shape of a semicircle, forming curvilinear cutting edges.

The claimed utility model is illustrated by drawings.

FIG. Figure 1 shows a knife segment of a cutting apparatus with a semicircular cut in the middle part, which forms the cutting edges of a curvilinear shape and the velocity diagram of the beginning and end of cutting.

FIG. 2 is a diagram of the forces acting on the proposed knife segment.

FIG. 3 is a diagram of the power required for the drive of the proposed cutting apparatus.

FIG. 4 shows a prototype of the cutting apparatus, which forms the cutting edges of a rectilinear form and the velocity diagram of the beginning and end of cutting.

FIG. 5 is a diagram of the forces acting on the prototype knife segment.

FIG. 6 is a diagram of the power required for the drive of the prototype of the cutting apparatus.

The proposed design of the knife segment of the cutting unit of the harvesting machine consists of the body of the segment 1, made in the form of a rectangle with a semicircular notch 2, which forms the left 3 and right 4 edges of the segment. At the base of the body of the segment 1 there are holes 5 for attaching it to the knife strip (not shown).

The device works as follows. The knife segment 1 is attached to the knife strip (not shown) with bolts (or rivets) forming a knife. In the process of work, the knife of the cutting apparatus reciprocates. When the segment moves, for example, to the right, the plants are pinched and cut between the blade 3 of segment 1 and the shearing edge of the finger 6.

Description of the work of a separate segment 1 when moving the knife, for example, to the right along the x axis. The pinching and cutting of the plant between the blade 3 and the shearing edge of the finger 6 is accompanied by a change in the speed of the beginning and end of the cutting, expressed in the В ₂ В ₃ curve. The knife is affected by the shear resistance forces P _cf , the friction F _tr and the inertia P _j , which, when summed, give the force T. also when operating the knife in the same conditions, it decreases by 20% for the proposed cutting apparatus in comparison with the prototype. In addition, due to the small angles of inclination between the cutting edge of the segment, the shearing edge of the finger and their axial lines, the pushing of the stems from the place of pinching and cutting does not occur.

Conclusion. The proposed design of the knife segment allows you to reduce energy costs for the drive of the cutting unit and to ensure the required quality of the device.

Claims (1)

The knife segment of the cutting apparatus, consisting of a body with holes for attachment to the knife strip, and a cut-out with cutting edges, characterized in that the middle part of the cut-out of the knife segment is made in the shape of a semicircle, forming curvilinear cutting edges.

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