SU628244A1 - Ditch excavator working member - Google Patents

Description

The invention relates to earthmoving machines and, in particular, to machines with a chain working body for trench fragments.

It is known to use a trench excavator cutting device, consisting of a traction chain, to which links the working elements containing the cutting and transporting parts ril are hinged and with the help of an earring. Work elements must be unloaded from the ground when the angle of inclination changes. However, the sticky soil is kept on the working surface of the elements, and it is impossible to unload them. The resistance to digging by the worker organ thus increases significantly.

The closest technical solution to the invention is a trencher for narrow slotted arenas, including a frame and endless cutting blade 21. On an endless chain are fixed in alternate order blade-blades and blade-blades. However, the shape and working surface of the cutting elements do not reduce the digging resistance of the sticky plastic soil, because the soil sticks to their working surface and is held onto it. The unloading is worsened and the machine productivity is reduced.

In order to increase productivity by reducing the resistance to digging when developing sticky plastic soils in the proposed device, the working surface of each element is made convex in the form of alternating protrusions with different steepness of slopes, with the slopes facing the cutting edge and the steep ones towards the cutting edge of the cutting element. The last protrusion at the rear edge of the cutting. element is arcuate.

FIG. 1 shows the proposed working body of the excavator-draining machine, bottom view; in fig. 2 - the same, side view; in fig. 3 - shzhk part of the cutting element in cooperation with a sticky. Plastic soil, side view; in fig. 4This is the plan. The working body consists of a traction chain 1, a mounting plate 2 and a cutting element fixed on it consisting of a supporting plate 3 with a vertical stand 4 and a flat knife 5 installed at an angle oi to the direction of its movement V, .... In the process of the working body of the excavator-draining machine, the flat knife 5 cuts the sticky plastic soil {see, FIG. 3 and 4), which is divided by a vertical upright 4 into two arms that move along the working surface of the cutting element in directions from its cutting edge c (d to the rear 6b. A convex arcuate working surface O cdeb of the cutting element creates workability, which reduces Resistance to digging of sticky plastic soil, due to the smoothness of cutting during lifting and gathering of soil chips from the cutting element. The working surface of the cutting element is made in the form of alternating slots c, d, ev b with different steepness of the slopes. ((X), flat ac, Cd from two sides on a vertical upright 4 c (C, c (| and d C on a flat knife 5 and steep C С nd (y on a vertical rack 4 and ss. On a flat knife 5. At the beginning of the process of cutting the cutting element, the plastic soil slides on the working surface Q C and then along the tops of the alternating protrusions C, d, e and b from the slopes, without contacting the entire working surface of the vertical rack 4 and knife 5. At the same time, the contact area of the working surface / cutting element with sticky soil will significantly reduce eats behind the protrusions on it.

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Claims (2)

: :::: i: The reduction in the contact area provides a reduction in the resistance to digging, hence the productivity of the machine increases. A bevel on the 3–5 end face of the cutting element (see Figs. 1 and 4) also provides a reduction in the overall resistance to the sticky soil by the working body. The proposed working body increases the productivity of the pied pelt at the passage of trenches in sticky plastic soils by 5-15%. Claim 1. Worker body excavator-draining machine, which includes a frame, a pull chain with fixed on it cutting elements with a working surface, cutting and trailing edges, and so that, in order to increase performance by reducing the resistance to digging in the development of sticky plastic soils, the working surface of each element is made convex in the form of alternating protrusions with different steepness of slopes, with sloping slopes facing the cutting edge and steep towards the rear edge Oms of the cutting element, 2. Working body in accordance with claim 1, 1, O TL, and due to the fact that. the last protrusion at the rear edge of the cutting element is arcuate. Sources of information taken into account in the examination: 1. USSR author's certificate number 194007, cl. E 02 F 3/14, 1967, 2. USSR author's certificate number 111628, cl. E 02 F 5/06, 1957.