RU2382538C2 - Cultivator on resilient posts - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: cultivator includes a frame with S-shaped spring posts installed on it. The cultivator is equipped with restrictors rigidly fixed on the frame and located inside spring parts of S-shaped posts. The restrictors have a curved surface made at equal distance of the post spring part.

EFFECT: expansion of uniformity of depth of stroke of the cultivator working unit, expansion of serviceability of the cultivator on soils with different physical and mechanical properties.

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Description

The invention relates to agricultural machinery, in particular to tillage implements, namely cultivators.

Known cultivators with S-shaped elastic (spring) struts attached to the frame of the cultivator, i.e. cultivators with oscillatory working bodies [Khalansky V.M., Gorbachev P.V. Agricultural machines, M .: Kolos, 2003, p. 74].

Cultivators with oscillating working bodies can reduce traction resistance by 25-30% compared with rigidly fixed, and the elastic stand reduces the sticking of the paws in the soil compared to hard.

However, despite the advantages, the legs on an elastic stand (S-shaped pendants) during operation have a deviation from the set processing depth by 10-15% more than with a rigid suspension.

These disadvantages are partially eliminated in the cultivator, including a frame with S-shaped uprights installed on it, where a beam is mounted on the frame inside the front spring legs, on which the stops are rigidly fixed [SU 1683507 A1, 10/15/1991]. In this cultivator, plant residues on the S-shaped legs are reduced, but problems remain to ensure traction resistance reduction and preservation of the given processing depths.

The aim of the invention is to increase the uniformity of the depth of stroke of the working body of the cultivator, as well as expanding the operational capabilities (versatility) of using a cultivator with S-shaped elastic struts on soils with different physical and mechanical properties.

To achieve this goal in a cultivator having a frame with S-shaped elastic struts mounted on it, the cultivator working bodies contain limiters for changing the stiffness of the spring part of the S-shaped strut, which allows changing the rigidity of the strut depending on the applied horizontal load (on the depth of soil cultivation and its physical and mechanical properties), thereby ensuring stabilization of the processing depth within agrotechnical requirements. The limiter has a curved surface made equidistant to the spring part of the rack, and is rigidly mounted on the frame inside the spring part of the S-shaped racks.

Figure 1 shows a diagram of the cultivator, figure 2 - profile of the limiter with reference points, figure 3 is a side view of the limiter.

The cultivator contains a frame 1 with S-shaped elastic (spring) struts 2 rigidly mounted on it, a limiter 3 mounted rigidly on the strut by means of a bolt connection inside the spring part of the strut 4.

The cultivator works as follows. When cultivating the soil with a cultivator, the spring resistance 2 acts on the soil resistance force P, depending on its physical and mechanical properties and on the depth of processing. The working body of the cultivator on an elastic stand begins to make oscillatory movements as a result of the uneven nature of the destruction of the soil when cutting the soil and pushing the paws. The spring part of the rack, as an elastic element, begins to bend under the action of soil resistance forces. With low soil resistance as a result of deflection, the spring part 4 of the rack begins to come into contact (contact) with the curved surface of the limiter 3, for example, with the AB section. In this case, the stiffness of the rack changes (increases) due to a change (decrease) in the length of the spring part of the rack, i.e. the site works to the 2nd reference point, figure 2, figure 3.

With a further increase in the soil resistance force, the following sections of the limiter profile are alternately switched on: A-C, A-D, A-E. In Fig.2, this is a section up to the 3rd, to the 4th, to the 5th reference points.

When the load on the paw of the spring strut changes, the strut bends as an elastic element and the working end of the strut 2 rises, trying to reduce the cultivation depth.

The reference points of the limiter provide an automatic change in the stiffness of the rack at different physical and mechanical properties of the soil and keep the deviation from the set value of the processing depth within the agrotechnical tolerance.

Claims (1)

A cultivator comprising a frame with S-shaped spring struts installed on it, characterized in that it is equipped with limiters with a curved surface, made equidistant to the spring part of the strut, rigidly fixed to the frame and located inside the spring parts of the S-shaped struts.

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