RU2113344C1 - Blade of shearing machine - Google Patents

Abstract

FIELD: animal-breeding accessories. SUBSTANCE: this is intended for shearing wool from animals. Blade of shearing machine is of box configuration and it has teeth with spaces which are formed by back side, side surfaces, load-bearing cutting edges, and base. Spaces of teeth are packed with filling agent which contains antifriction material. Used as antifriction material is graphite or plastic. Filling of tooth spaces with filling agent reduces power consumption of shearing machine, enhances wear resistance of cutting edge and improves quality of sheared wool. EFFECT: higher efficiency. 3 cl, 4 dwg

Description

 The invention relates to means of mechanization of livestock and can be used in machines for cutting animals.

 Closest to the claimed knife in technical essence and the achieved result is the well-known knife shearing machine box-shaped, which contains teeth with cavities formed by the back, side surfaces bearing cutting edges, and the base [1].

 A disadvantage of the known design is that the box-shaped tooth of the knife with a forward stroke (to the right) along the comb deflects the hairs to the opposing edge of the comb tooth, pinches them and cuts them. Since the knife stroke is equal to the three steps of placing the teeth of the comb, the cut hairs are melted into the internal cavity of the tooth, rising above the cutting plane. In addition, with the translational movement of the machine, the distance between the edges of adjacent teeth of the comb decreases, so when the knife moves back (to the left), the straightened hairs significantly protrude above the cutting plane even at the moment of jamming with the back edge of the knife. The back edge of the knife, in contrast to the cutting edge, has a negative installation angle to the cutting plane. Wool lifts the knife above the cutting plane. This phenomenon is compensated by the excessively strong pressing of the knife to the comb so that the back edge of the knife can cut the hairs in extremely disadvantageous modes of cutting theory. This leads to a multiple increase in the energy intensity of the cutting process, enhances wear, increases the number of small particles - "cuts" in the total mass of wool.

 In addition, gears with dirt, sand and grease flow entering the internal cavities of a box-shaped knife clog this space and act as an abrasive cushion, wearing out the cutting pair and creating a gap between the knife and comb, which also requires additional clamping force, increases the friction force on the cutting pair and as a result, the effort to drive the knife.

 The technical result, the solution of which the invention is directed, is to reduce the energy intensity of the machine drive, increase the wear resistance of the cutting pair and improve the quality of the sheared wool.

 The specified technical result in the described solution is achieved by the fact that in the knife of the shearing machine is box-shaped, containing teeth with cavities formed by the back, side surfaces bearing cutting edges and a base, according to the invention, the tooth cavities are filled with a filler comprising an antifriction substance, which is used as graphite or plastic.

 In FIG. 1 shows the described knife top view; in FIG. 2 is a cross section AA in FIG. one; in FIG. 3 - described knife, top view; in FIG. 4 is a transverse section of a tooth according to BB in FIG. 3 with filler.

 The described knife of a shearing machine for animals contains teeth 1 with cavities 2, formed by the back 3, side surfaces 4, bearing edges 5, and base 6. The cavities of 2 teeth 1 are filled with filler 7. The filler includes an antifriction substance, which is used as graphite or plastic ( kapron, diphlon, etc.).

 The described knife works as follows.

 The knife is a movable, active part of the cutting pair of a washing machine for animals and works in conjunction with a passive stationary opposite comb. The shearing machine moves the shearer's hand over the skin of the animal. The comb, penetrating into the wool massif, divides it with teeth 1 into bunches. The knife brings the beam lateral surface 4 of the tooth 1 from the base 3 of the tooth to the cutting edge 5 of the comb, pinches and cuts the cutting edge of the 5 tooth.

 With the reverse stroke of the knife due to the fact that the internal cavities 2 of the teeth 1 are excluded, the cut hairs cannot rise above the cutting cavity and are not subjected to a rotary cut. The energy intensity of the cutting process is reduced. The amount of "chopping" is reduced. The effect of raising the knife by pinched gears above the cut cavity is excluded. Therefore, the clamping force on the base 3 of the knife is reduced to a minimum value, burning the wear rate and increasing the resource of machine parts.

 A knife, the internal cavities at the base 6 of which are excluded by filling them with a filler 7 with antifriction material, for example graphite, moving along the surface of the comb, evenly distributes antifriction material in the zone of movement of the knife.

 This reduces the coefficient of friction and reduces energy costs for the movement of parts of the entire machine.

Claims (4)

 1. A knife of a box-shaped shearing machine containing teeth with cavities formed by the back, side surfaces bearing cutting edges and a base, characterized in that the tooth cavities are filled with filler.  2. The knife according to claim 1, characterized in that the filler includes an anti-friction substance.  3. The knife according to claim 2, characterized in that graphite is used as an antifriction substance.  4. The knife according to claim 2, characterized in that plastic is used as an antifriction substance.

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