RU21404U1 - GRADER BLADE KNIFE - Google Patents

Abstract

1. The blade of the grader blade, comprising a prefabricated block of corner and central knife plates equipped with mounting holes and weld-in reinforcing material in the form of strips on the working edges of the knife plates, characterized in that the central and corner knife plates are made of all-welded assembly, while the thickness of the latter is greater and the surfacing of the reinforcing material is made along the entire perimeter of the working edges of the all-welded unit. 2. The grader blade knife according to claim 1, characterized in that the central knife plates are made in height less than the corner plates with the possibility of installing the working edges of the latter on the blade below the level of the working edges of the central knife plates. The grader blade knife according to claim 1, characterized in that the corner knife plates are 20-35% thicker than the central knife plates. The blade of the grader blade according to claim 1, characterized in that the total width of the block of knife plates is greater than the width of the blade with the possibility of the exit of the corner knife plates beyond the side contour of the blade.

Description

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GRADER BLADE KNIFE

The utility model relates to the working bodies of earth moving vehicles in particular graders and can be used in the construction of roads with rocky soil.

During road construction works, the wear of knives at the edges of the blade is most intense, because these work areas are under the most difficult working conditions. When replacing a blade knife, wear at the edges of the blade is marginal, and the central part with less wear remains operational. Variation of knife wear resistance at the edges of the blade will increase the life of the knife as a whole and optimize the manufacturing costs and durability of the blade

A device for attaching knives of road machines to a blade equipped with mounting holes through which fasteners having a threaded rod mounted outside the contour of the knives, the device is equipped with plates for pressing the knife to the blade, curled on an intermediate element made in the form of a bar , the disch of which is equal to the thickness of the knife, and on the blade on the opposite side of the plates, support strips are fixed and the blade is equipped with hoppers having holes for 1 x element and fixed with to the knife side of the blade; between each yustine and the heap of deception, an elastic element whose thickness in the initial STATE is greater than the thickness of the knife. (Certificate No. 5413, PMPO No. 11, 1997)

E02F3 / 76 E 02 F 3/815

The known solution does not provide high wear resistance of the blade knife when working on mowing soil and does not provide bilateral use of the working edges of the knife.

Closest to the claimed is the working body of a road construction machine, including a blade knife and a reinforcing element fixed to it, made with a variable length thickness, determined by the formula

T To4-K-B, where; That is the thickness in the central plane B is the distance from the axis of symmetry of the knife K 100 - 600 is a coefficient determined by the strength of the processed masses.

At the same time, the reinforcing element is made of a high-chromium alloy microalloyed by rare elements, forming a damping layer during operation, which is equidistant to the compact working surface and is made integral or composite in length with welding and / or mechanical fastening on the knife. (Certificate No. 10190, PMPO No. 6, 1999)

The known device does not provide the necessary durability of the knife with limited possibilities for bilateral use of the knife, does not provide uniform and simultaneous wear of the working edges of the knives along the perimeter of the blade.

The problem solved by the utility model is to increase the overall abrasive wear resistance of the blade knife, the ability to use knife plates on both sides with re-fastening after wear of the knife edge, optimizing the cost of filing the reinforcing material with the overall wear resistance of the blade blade.

The problem is solved in that the grader blade knife, comprising a prefabricated block of corner and central knife plates equipped with fastening holes and weld-in reinforcing material in the form of strips on the working edges of the knife plates, is made with all-welded assemblies of central knife and corner knife shafts, while the thickness of the latter is greater, and the surfacing of the reinforcing material is made around the entire perimeter of the working edges, of the all-welded assembly, while the central knife blades are made at a height less than the angular the possibility of installing the working edges of the latter on the blade below the level of the working edges of the central knife plates, in addition, the corner knife plates are made 20 to 35% thicker than the integral knife plates, and the total width of the knife plate block is greater than the blade width with the possibility of the exit of the corner knife plates beyond the side contour dump .. Distinctive from the closest analogue state signs are:

- the central and corner knife plastshvd are made of an all-welded unit, (which allows the increased rigidity of the block of knife plates, manufacturability of manufacture and installation on the blade, compliance with the requirements of strength and durability of each working area of the all-welded unit with optimization of material costs for each zone)

- the thickness of the corner knife plates is greater than the central knife plates by 20 - 35% (which ensures the durability of the most worn parts of the knife)

- surfacing of the reinforcing material is made along the entire perimeter of the working edges of the all-welded unit (which allows for wear

working edges to replace with new ones by simple rearrangement of the all-welded unit with rotation)

-central knife plates are made in height less than knife angles with the possibility of installing the working edges of the latter on the blade below the level of the working edges of the central knife plates (which allows partially unloading the central knife plates and differentiate the wear of the blade knife to obtain knife components that are equally resistant to abrasion).

-the total pfpina of the blade unit is larger than the blade width with the possibility of the exit of the corner blade plates beyond the side contour of the blade (which prevents wear of the side edges of the blade, especially Ttpn working with a significant angle of rotation of the blade) Thus, the claimed solution meets the criterion of "novelty.

Comparison with analogues and other well-known solutions did not allow us to identify prefixes in them that adhere to the claimed solution from u) from 1 to 9, which allows us to conclude that the criterion of "invented level."

The utility model is illustrated by drawings, where in FIG. 1 shows a knife mounted on an oval in plan, in figure 2 is an enlarged fragment of the cross section of the blade knife.

The blade of the grader blade contains two all-welded assemblies w of corner knife plates 1 and central knife plates 2, equipped with holes 3 for fastening on the blade 4, strips of deposited reinforcing material 5 on the central side and strips of deposited reinforcing material 6 on the corner, located around the perimeter of the working edges of the all-welded assembly.

The device operates (is used) as follows. The all-welded blocks from the central 2 and the corner 1 of the knife plates fixed on the blade of the 4 grader are wider than the width of the blade, and during the movement of the grader they protect the lateral edges of the blade. Corner blade inserts 1, working under more severe conditions, wear more abrasively, but because of the greater thickness and volume of the deposited reinforcing material, the time of complete wear coincides with the complete wear of the central blade inserts operating in less severe conditions. After the complete abrasive wear of the workers, 1 knock-off of the knife plate block, the latter is reinstalled, turning each all-welded assembly with the other side to the working position and re-secured through the mounting holes 3. iwikia is repeated.

The inventive utility model provides an increase in the overall aphasic wear resistance of the blade knife, the possibility of using knife yalastins on both sides with re-fastening after wear of the working edges of the knife, optimization of the tool rolls for surfacing of the reinforcing material with the overall wear resistance of the blade knife.

Claims (4)

1. The blade of the grader blade, comprising a prefabricated block of corner and central knife plates equipped with mounting holes and weld-in reinforcing material in the form of strips on the working edges of the knife plates, characterized in that the central and corner knife plates are made of all-welded assembly, while the thickness of the latter is greater and the surfacing of the reinforcing material is made along the entire perimeter of the working edges of the all-welded assembly.  2. The blade of the grader blade according to claim 1, characterized in that the central knife plates are made in height less than the corner plates with the possibility of installing the working edges of the latter on the blade below the level of the working edges of the central knife plates.  3. The blade blade of the grader according to claim 1, characterized in that the corner knife plates are 20-35% thicker than the central knife plates. 4. The blade blade of the grader according to claim 1, characterized in that the total width of the block of knife plates is greater than the width of the blade with the possibility of exit of the corner knife plates beyond the side contour of the blade.