RU28801U1 - Working body of a frame hoe - Google Patents

Description

FRAME RAKE WORKING BODY

The utility model relates to agricultural machinery, in particular to hand tools, and can be used for weeding and loosening the earth.

For the manual weeding of small land plots, various types of motives are used, including frame motives. The working body of these motp is a ribbon-shaped blade, mounted between two supports. The plane of the blade moves parallel to the soil surface in its depth or on the surface, shaving weeds or pruning their roots. In this case, conflicting requirements are presented to the blade. On the one hand, for productive light work, you need a blade with a thin, narrow and long horizontal part that does not lose sharpness during operation. But, on the other hand, a thin and narrow blade that has little resistance to movement in the soil is not strong enough for its long length, and therefore the blade should be thickened and short.

In well-known designs, the question is solved in favor of either ease of operation, or productivity, or reliability of the product.

Known working body of the frame motor, made in the form of a hardened steel tape 0.5 mm thick, 10 mm wide, 60 mm long. The tape is stretched between two racks. The main disadvantage of this moti is the low labor productivity due to the small length of the cutting horizontal part and the small depth of immersion of the blade in the soil due to the large dimensions of the attachment point of the hardened tape with uprights. This working body does not need sharpening due to the low maintenance. TAPES of the tape.

Known working body of the frame hoes, made in the form of a hardened tape with a crowd of 0.5 mm wide, 15 mm wide, 120 mm long. Main disadvantage

low reliability of the blade is due to insufficient stability of movement in the soil and, as a consequence, a tendency to breakage.

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МЩ7А01В 1/08

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07/09/95 (prototype). The horizontal part of the blade has a thickness of 1.5 mm, a width of 20 mm, a length of 120 mm. To ensure self-sharpening during operation, the blade is made of bimetal with different hardness of metal layers or of hardened

laser-treated metal. The blade provides sufficient ease of operation, productivity, reliability and depth of tillage.

The main disadvantage of this blade is the need to use complex and expensive technology to ensure self-sharpening.

The aim of the invention is to eliminate this drawback while maintaining the technical characteristics of the product.

This goal is achieved by the fact that the working body of the frame motya-i, made in the form of a flat blade of a U-shape, has on both sides along the contour of the blade a zone with a constant across the blade THICKNESS less than thick; other than the central part of the blade. The thickness of the "thin zone of the blade is 0.5-0.1 mm. A relatively thick, for example 1.5 mm, central power portion of the blade ensures that the shape of the blade is maintained during operation, and a “thin zone 26 mm wide is the cutting part of the blade. Such a working body does not need sharpening, has the technical characteristics of a prototype, and in the manufacture does not require the use of powerful lasers and large grinding machines for sharpening. “A thin zone can be made, for example, by milling or rolling the edges of the blade blank.

The surface of the central part of the blade facing the ground and the lower surfaces of the edge “thin zones” are in the same plane. This makes it easier to work with a hoe, since it takes less effort to immerse the blade in the soil due to the favorable 5t of the sharp part of the blade to the surface of the earth. Mismatch of the indicated planes is acceptable, but it is harder to work with such a blade.

The thin zone has a periodically varying thickness along the cutting edge, which can be completed by knurling. As a result of this, in the process of wear of the blade along the cutting edge, “teeth” are formed, which, as is known, improves the cutting properties of the blade.

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The hardening of the blade is carried out after bending the workpiece in order to avoid breakage of the blade during its manufacture.

The drawing shows the proposed working body frame motp and.

The working body consists of a blade of a U-shape 1, which has a thick central part 2 and two thin zones 3.

Claims (6)

1. The working body of the frame hoes, containing a flat blade of a U-shape, characterized in that the blade has on both sides, along its contour, zones thinner than the central part of the blade with a constant thickness across the blade. 2. The working body according to claim 1, characterized in that the thickness of the thin zone is 0.1-0.5 mm 3. The working body according to claims 1 and 2, characterized in that the width of the thin zone is 2-6 mm. 4. The working body according to claims 1 to 3, characterized in that one of the surfaces of the thin zone lies in the same plane with the Central part of the blade. 5. The working body according to claims 1 to 3, characterized in that the planes of the surfaces of the thin and central zones do not coincide. 6. The working body according to claims 1 to 5, characterized in that the thin zone has periodically variable thickness along the cutting edge.