RU2453099C1 - Segment of cutting device - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to the agricultural machinery and can be used in cutting devices of agricultural machinery for mowing grain crops. The segment of the cutting device consists of a back, a track for contact with the clamp and the base. On the back of the segment there is a cutout to reduce its weight. On the base of the segment the holes are made for attaching it to the blade strip. On the sides of the segment the blades are formed. On the back part of the blades a wear-resistant diamond-like coating is applied. Between the base and the back of the segment the cutouts are made with an ability to exclude the bending under the action of vertical forces.

EFFECT: segment of the cutting device has a reduced consumption of materials, which increases the operating efficiency of the cutting device.

5 dwg

Description

FIELD OF THE INVENTION

The invention relates to agriculture, in particular to segments of a cutting apparatus, and can be used in cutting apparatuses of agricultural machines mowing crops, including in a laid state.

State of the art

A known segment of the cutting apparatus, consisting of a base, holes for attachment to the knife strip and protrusions on the sides of which there is a blade (see Claas, Germany, www.claas).

The disadvantage of this segment of the cutting apparatus is the low resource of the blade and excessive metal consumption.

Known segment of the cutting apparatus, made in the form of two symmetrical trapezoidal parts with cutting edges, the sharpening of which is made in the form of successive segmented bores along the entire blade of the cutting edges at an acute angle to the plane of the segment. At the junction of two symmetrical trapezoidal segments, a groove is made that smoothly mates with both blades in the form of a round hole (see patent RU No. 2287255, IPC A01D 34/14, published November 20, 2006).

The disadvantage of this segment is the increased mass and, as a result, the increased energy intensity of the cutting process. You should also point out the low reliability of the design due to the presence of two trapezoidal parts.

The closest in technical essence and the achieved positive effect and accepted by the author for the prototype is a segment of the cutting apparatus, consisting of a base, holes for attachment to the knife strip and a protrusion on which the notched blade is located (see GOST 158-74, IPK PUBLISHING HOUSE STANDARDS, Moscow )

The disadvantage of this segment of the cutting apparatus is the small resource of the blade and the large mass.

Disclosure of invention

The objective of the invention is to reduce the loss of working time due to a segment malfunction and increase the productivity of the machine involved in harvesting, as well as to reduce crop losses due to standing up. This result is achieved by applying a wear-resistant coating to the surface of the blade and reducing the weight of the segment.

The technical result that can be obtained using the present invention is to increase the productivity of harvesting equipment, reduce crop losses by applying a wear-resistant coating to the blade segment of the cutting device, and also reduce its weight.

The technical result is achieved by the fact that the cutting device segment has a base on which holes for fastening to the knife strip are located, blades are formed on the sides, a wear-resistant diamond-like coating is applied to the occipital part of the blade, cutouts are made on the back and also between the base and back with the possibility of exclusion bending under the action of vertical forces.

Brief Description of the Drawings

Figure 1 - segment of the cutting apparatus, top view.

Figure 2 - segment of the cutting apparatus, bottom view.

Figure 3 - segment of the cutting apparatus Assembly with a knife strip, top view.

Figure 4 is a segment of the cutting apparatus Assembly with a knife strip, in a section.

5 is a diagram of the interaction of the segment of the cutting apparatus with the stem.

The implementation of the invention

The segment of the cutting apparatus consists of a back 1, on which there is a cutout 2, for example, of a triangular shape, contributing to a decrease in its weight by 8-10%, of the blade 3, while a wear-resistant diamond-like coating 4 is applied to the occipital part of the blade 3, tracks 5 for contact with clip 6, the latter is installed together with the finger 7 on the beam 8, and on the finger 7 there is an insert 9, which prevents the stem 10 from deflecting when interacting with the blade 3, the base 11, on which there are holes 12 for attachment to the knife strip 13, between the base 11 and spin 1 segment there is a cutout 14, for example, of an oblong-oval shape, excluding the possibility of its bending under the action of vertical forces.

Operated segment of the cutting apparatus as follows.

The cutting apparatus segment is fastened with the base 11 to the knife strip 13 with rivets 15, which, in turn, are installed in the holes 12. In order for the segment not to leave the insert 9, a clamp 6 is provided in the cutting apparatus (not shown), the latter contacts the segment through track 5 . In operation, the segment of the cutting apparatus performs a reciprocating motion in which the interaction of the blade 3 with a stem segment 10 plants, at last a force W, which may be decomposed into P _cr, destroys stem 10 and force Tp Nia stem 10 on the blade edge 3 F _tr. In turn, from the side of the stem 10, the force Q acts, which is a reaction to the shear, it can be decomposed into P _cut , shear resistance forces and the force F _c pushing the stem 10 out of the cutting zone. The value of the force P _cr exceeds P _rez , which results in compaction and movement of the plant mass along the surface of the blade 3. Due to the wear-resistant diamond-like coating 4, the upper part of the blade 3 wears out more intensively than the lower one, as a result of which the self-sharpening effect is achieved.

In the case when a foreign object (metal, wood products, stones, etc.) gets into the cutting zone when the sweeper moves, the force P _res sharply increases. In this case, the drive of the cutting apparatus (not shown) continues to move the blade strip 13, as a result of which the backrest of segment 1 is deformed. The segment turned and bent in the vertical plane during reciprocating movement meets the details of the finger 7, which destroy it, collapsing at the same time. When mowing, the cutting edges of the blade 3 become dull and crumble quickly. The fingers 7 of the cutting apparatus suffer no less damage as a result of meeting with the segments. The liners 9 are quickly dull and sometimes crumble along the edge; the fastening of the fingers 7 is loosened, and they often move out of place. Very frequent are the phenomena of deformation and breakage of the feathers of the finger 7, with which the segments are encountered. All these phenomena cause large stresses in the details of the cutting apparatus and its drive. To exclude the possibility of damage to other organs of the cutting apparatus due to the bending of the segment, the invention provides a cutout 2.

Since the power to drive the cutting apparatus (not shown) due to friction significantly exceeds the power for cutting, the energy consumption for work without a large error can be determined by the power (kW) spent on overcoming inertia:

where N is the power consumed by the cutting apparatus, kW;

m _n - the mass of the knife, kg;

r is the radius of the crank, m;

ω is the angular velocity of the crank, s ^-1 .

The proposed design of the segment due to cutouts 2 and 14 is lighter than standard samples by 15%, which will reduce the power consumed by the cutting device.

The segment according to the invention shown in FIGS. 1 and 2 can be used in cutting apparatuses of grain harvesting machines for their specialization in harvesting crops, including useful and moistened ones, as well as for temporary conversion of their cutting apparatuses to harvesting healthy and moistened breads.

Technical and economic efficiency from the use of segments according to the invention will consist of increasing the efficiency of grain harvesting machines and reducing crop losses associated with this.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- improving the efficiency of the cutting apparatus;

- reduction of metal segment;

- reducing the load on the drive of the cutting apparatus by reducing the mass of the segment;

- improving the quality of the cut crop.

Claims (1)

A segment of the cutting apparatus, consisting of a base on which there are holes for attachment to the knife strip, and blades are formed on the sides, characterized in that a wear-resistant diamond-like coating is applied to the occipital part of the blade, cutouts are made on the back and between the base and back exclusion of bending under the action of vertical forces.

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