RU160529U1 - STRAWER HARVESTER - Google Patents

Abstract

A combine straw walker containing flexible balers fixed inside the keys of the straw walker, characterized in that it is equipped with loads fixed to the balers, while the balers are fixed inside the straw walker keys on opposite side surfaces.

Description

The proposed utility model relates to agricultural engineering and is intended to increase the efficiency of the combine harvester equipped with a straw walker.

Known keyboard straw walkers used in combines [Klenin N.I., Sakun V.A. Agricultural and reclamation machines - M .: Kolos, 1974. - 751 p., Fig. 6.33a], in which the key bodies perform plane-parallel movement in a vertical plane, and are made with the lattice surface of the upper part of the body. In the known construction, there is clogging of the openings of the trellised surface with straw-grain heaps, which impairs the separation of threshed grain, in addition, when harvesting spinous crops or crops at high humidity, the moving mass sticks to the lower surface of the straw walker keys.

We take for the prototype the closest in technical essence and the achieved result invention No. 2183055 a straw walker of a combine harvester, which is equipped with flexible balers fixed by means of a threaded joint on an inclined bottom inside the straw walker buttons. The known device helps to increase the efficiency of separation of grain from straw due to the impact of beaters on the trellised surface.

Signs of a known mechanism (prototype) that match the claimed utility model are as follows. It contains flexible balers fixed inside the keys of the straw walker.

In the known device, flexible beaters have a small mass and are fixed at the bottom of the keys, that is, far enough from the trellised surface. This design reduces the effectiveness of impacts on the trellised surface during the operation of the straw walker due to the insignificant kinetic energy of the impact of the balers. At the same time, the attachment of the balers at the bottom of the keys of the straw walker prevents the free movement of mass on the lower surface of the keys and contributes to packing a heap in the area of the binder attachment.

The objective of the proposed utility model is to reduce the clogging of the holes of the trellised surface of the keys of the straw walker. The technical result is an increase in the efficiency of separation of the grain mass due to the impact of beaters.

The proposed combine straw walker has the following essential features. It contains flexible balers with loads attached to the balers, while the balers are mounted inside the straw walker keys on opposite side surfaces.

In FIG. 1-3 given a variant of the proposed device; in FIG. 1 is a diagram of a straw walker; in FIG. 2 is a diagram of the interaction of the hammer with the trellised surface (section AA of FIG. 1); in FIG. 3 shows the vertical movement of the points of the device.

The proposed mechanism (Fig. 1 and 2) comprises two parallel cranks 2 of radius R mounted in the housing 1 of the combine connected to the housing of the keys of the straw walker 3; 4 - trellised surface (upper part of the straw walker key body), 5 - flexible baler fixed at points “a” and “b” on the side surface of the straw walker casing, 6 - load fixed on the flexible baler.

The device operates as follows. When turning the cranks 2 (α is the angle of rotation), the button body of the straw walker 3 performs plane-parallel movement, while all points of the body move along circles of radius R. The load 6, attached to the flexible knocker 5, makes a complex movement due to the flexible fastening. The trajectories of the lattice surface 4 and the load 6 at some point in time t _K intersect, and a collision occurs. Due to the impact, the clogged holes of the trellised surface 4 are cleaned, as well as the sticky mass is shaken at the bottom of the straw walker keys 3.

The vertical displacements for the lattice surface 4 from the point “c ₀ ” and the attachment points “a” and “b” of the knocker 5 are determined by the expression

- время, Т - время оборота кривошипа (период). При

=0 нижняя точка решетчатой поверхности «c₀», как и точки крепления «a ₀» и «b₀» подбивальщика находятся в крайнем верхнем положении.Where

- time, T - crank revolution time (period). At

= 0, the lower point of the lattice surface “c ₀ ”, as well as the attachment points “ a ₀ ” and “b ₀ ” of the knocker are in the highest position.

Gravity force mg (g = 9.81 m / s ² ) acts on load 6 with mass m, and when the straw walker body moves, the free movement of the load down is

z (t) = s + Δ + 0.5gt ² .

The collision time t _{To the} load with a lattice surface is determined from the equality

Take (based on the kinematic mode and operation parameters of the straw walker of the Don-1500B combine) R = 0.08 m; T = 0.4 s, s = 0.03 m; Δ = 0.04 m.

From the graphs of the vertical displacements of the points (Fig. 3) - t _K = 0.07 s.

In the proposed device, flexible beaters can be made both inelastic and elastic, for example, made of rubber or spring loaded.

Output.

The proposed design of the straw walker keyboard walker allows to increase the efficiency of grain separation by cleaning the trellised surface of the straw walker keys due to the impact of flexible balers with a load attached to the opposite side surfaces of the keys.

Claims (1)

A combine straw walker containing flexible balers fixed inside the keys of the straw walker, characterized in that it is equipped with loads fixed to the balers, while the balers are fixed inside the straw walker keys on opposite side surfaces.

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