RU2011759C1 - Working tool of plow-type trenching machine - Google Patents

Abstract

FIELD: earth-moving machines. SUBSTANCE: horizontal sections of body are drawn by lines of alternating curvature, concave along motion in lower part of body and convex in its upper part. Zero-curvature section is disposed on a height larger than the depth of recess, the curvature of each section being maximum on blade jointing line and diminishing towards side edges. Elimination of soil wedging between blade and monolith reduces draft resistance with resultant saving of fuel. EFFECT: lower draft resistance. 2 cl, 2 dwg

Description

 The invention relates to earthmoving machines, and in particular to plow diggers.

 Known working body of the plow canal digger [1], including a ploughshare connected to the right- and left-turning bodies, which are joined along a common curve.

 Known for the plow-dump surface of the plow body of the channel digger [2], horizontal sections of which are triangles located with their vertices in the direction of movement of the body. At the same time, the vertices of the triangular sections lie on a common curve along which the left- and right-turning parts of the body are joined.

 Cases known plow canal diggers have increased traction resistance. This is due to the fact that the loosened soil is jammed between the right- and left-turning dumps of the hull and the undestroyed monolith of soil. This is because the pressure created by the casing is transmitted to the undestroyed soil monolith. Jamming of the soil is also facilitated by the fact that when loosening, the volume of soil increases, and the volume enclosed between the body and the wall of the excavation remains unchanged. For the displacement of jammed soil along the dumps, additional effort is required, which increases the traction resistance.

 The purpose of the invention is the reduction of traction resistance.

 This goal is achieved by performing horizontal sections of the hull with lines of alternating curvature concave in the direction of movement in the lower part of the hull and convex in the upper part of the hull, and the cross section with zero curvature is located at a height greater than the depth of the excavation, while the curvature of each section is made maximum at the junction of the dumps and decreases to side trimmings.

 Comparative analysis shows that the inventive working body of a plow-type canal digger differs in a new shape of the surfaces of right- and left-turning dumps, horizontal sections of which are concave in the direction of movement of the working body in the lower part of the body and convex in the upper part of the body, and the cross section with zero curvature is located at a height , greater depth of the excavation, while the curvature of each section is made maximum at the junction line of the dumps and decreases to the side edges.

 Comparison of the claimed technical solution with others shows that the claimed working body exhibits new properties, which leads to a decrease in traction resistance. This allows us to conclude that the technical solution meets the criterion of "significant differences".

 In FIG. 1 shows a proposed working body, side view; in FIG. 2 - the same, top view.

The working body includes a ploughshare 1, right- and left-turning dumps 2, 3, which are joined along a common curve 4 lying in a vertical plane. Horizontal sections 5 - 9 are made of alternating curvature: convex (5, 6) in the upper part of the dumps and concave (8, 9) in the direction of movement. Section 7 with zero curvature (straight line) lies at a height h, which is above the depth h _{in the} recesses. The working body has side cuts 10, 11. Horizontal sections 5, 6, 8, 9 are made of variable curvature, which is maximum on the line 4 of the junction of the dumps and decreases towards the side cuts 10, 11.

 Plow digger works as follows.

Cleaved by a share 1, a layer of soil enters the left- and left-turning dumps 2, 3. Since sections 8, 9 in the lower part of the dumps are concave in the direction of movement, the surface of the dumps 2, 3 forms a groove along which soil is transported from the share 1 to the side edges 10, 11. This prevents jamming of the soil between the monolith and the surface of the dumps. In this case, the pressure created by the dumps is directed inside the loosened soil and contributes to its promotion. This is also facilitated by the fact that section 7, which has a rectilinear shape, lies at a height h greater than the depth h _{in the} recesses. Having risen from the recess and coming down from the side cut-offs 10, 11, the soil makes a dumping, forming a dam. The convexity of sections 5, 6 in the upper part of the blade facilitates the descent of the soil from the side edges 10, 11 and the formation of a dam.

 The exclusion of jamming of the soil between the dump and the monolith will reduce traction resistance, which leads to fuel economy.

Claims (2)

 1. THE WORKING BODY OF THE CHANNEL DIGGER OF A PLAIN TYPE, including a ploughshare, right- and left-turning dumps connected along a curve located in a vertical plane, characterized in that, in order to reduce traction resistance, horizontal sections of the surfaces of the dumps are made of alternating curvature concave in the direction of movement of the working body in the lower part of the dumps and convex in the direction of movement of the working body in the upper part of the dumps, and the cross section of zero curvature is located at a height greater than the depth of excavation a.  2. The working body according to claim 1, characterized in that each horizontal section of the dumps is made of variable curvature, which is maximum at the junction line of the dumps and decreases towards furrowed cuts.

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