FI114654B - Flexibly mounted sectional blade assembly for reduced snow plough wear - has series of snow cutting blades covering plough width and flexibly fixed by resilient member to plate bolted to bottom edge of plough - Google Patents

Abstract

Three mounting plates (2) are attached by bolting (5) to the bottom edge of the main plough member (1). Each plate (2) includes an assembly of two hardened steel or similar snow cutting blades (4) fixed through an intermediate flexible member (3). The full assembly of six blades (4) covers the full plough width. The flexible intermediate member (3) permits the cutting blades (4) to have a degree of upward movement parallel to the mounting plate (2), in the event of the plough striking small projections or unevenness in the road surface.

Description

114654

AURA BLADE CONVENTION

The present invention relates to a plow blade assembly, preferably in a snow plow for attachment to a driving advisory, preferably to a tractor or truck, the blade assembly comprising a detachable and planar portion body, blade disc and mounting eyelets for attaching the blade disc to the body. The plow steel arrangement according to the invention is used in particular in connection with the plowing of asphalt-coated roads 10 with the purpose of purifying the asphalt coating.

It is already known in the plows to use separate vertical and width rigid blades to be attached to the plow, whereby the wear caused by friction is not applied to the plow itself, but to a separate replaceable blade part made of, for example, steel, carbide or the like. These blade parts are typically flat iron, for example, 300 mm high and 8 mm thick, varying in width according to the width of the plow, so that several blades can be mounted in parallel on one plow. During plowing, the angle between the blade and the road is generally about 55 ° to 70 °, with the lower part of the blade in the forward direction: relative to the upper part of the blade. The blade is then pressed against the road; with a force equivalent to about 1000 kg. The major problem with known plows • \ 25 is their rapid wear ·. ·, ·. which was greatly accelerated by unevenness in the road! manners. Experience has shown that even • carbide plow blades wear very quickly, especially if there is a lot of roughness on the plowed road. In addition, the road surface will naturally wear out. Consumption is primarily due

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•::: When a stiff plow blade hits an unevenness in the road <* * v: and the plow blade is pressed down with a corresponding force. approximately 1000 kg, either the plow blade or the road surface will be damaged and • worn before the plow has risen sufficiently for the blade to cross the unevenness. In addition, the well-known '' · rigid blades have an unsatisfactory performance, especially on grooved, '·· roads, which also makes use of plows with, for example, a large rigid steel blade plow and a small rubber blade plow behind it for final cleaning 40.

2 114654 It is an object of the present invention to provide a plow blade arrangement which has a better plowing footprint, and in which road irregularities consume much less blades compared to known blades, and which respectively consume less plow blade 5 known to plow. These objects are achieved by the steel plow arrangement of the invention, the characteristic features of which are set forth in the appended claims.

The invention is based on the idea that the blade portion in contact with the road is resiliently attached to the plow, whereupon the blade portion is resiliently upward as it strikes an unevenness in the road. The major advantage of the invention is, therefore, that the plow part and the road to be plowed wear considerably less than the known plow blade arrangements. The plow blade arrangement according to the invention further provides the advantage that when the plow hits an unevenness in the road that covers only part of the plowing width, the plow blade part does not rise up to its entire width but only at its unevenness and / or at 20 are momentarily at a certain angle relative to each other ', *. The plow blade arrangement of the invention, which utilizes a plurality of separate blade sections that follow the road surface, achieves a significantly better cleaning result compared to known plows, especially on grooved roads.

The plow according to the invention will now be described by means of two preferred embodiments with reference to the accompanying drawing,. wherein '30 in Fig. 1 is a front view of a first embodiment of a plow blade; Figure 2 is a side view of the plow of Figure 1, *. Fig. 3 is a front view of another embodiment of a plow blade, '35,' Fig. 4 is a sectional view of the plow of Fig. 3 taken along line IV-IV in Fig. 3, 114654 Fig. 5 shows one independently resilient member; Fig. 7 shows another elastic steel member of Fig. 5; Fig. 9 and 10 show in detail the skate member 10 of Fig. 5.

Figure 1 is a front view of a plow blade according to the invention. The plow blade comprises three bodies 2 fixed to the plow 1 by bolts 15 passing through holes 5 in planar bodies 2. At the lower part of each body 2, two separate blade discs 4 are attached via a part 3 made of a resilient material, preferably rubber, polyurethane or similar resilient material. The blade discs 4 are made of a wear-resistant material such as steel or carbide. The blades 4 may have gaps between them, whereby grooves are formed after plowing.

* Each blade blade 4 can flex vertically regardless of whether the blade blade hits the road.

The bodies 2 shown in Figure 1 can, of course, be replaced by a single unit body.

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Figure 2 is a side view of the blade attached to the plow 1 of Figure 1. The plow shown in the figure moves to the right during plowing. The blade body 2 is bolted to the plow, · 30 1 (not shown). Attached to the body 2 is a plate 3 made of flexible material 3. The blade plate 4, made of a material which is very wear-resistant, is fixed to the flexible plate 3. The blade plate 4 is thus resiliently attached to the body 2. It is essential to the invention that [35 plow blade cannot bend or rotate rearward when viewed in the plowing direction, even if the plow blade touches the road surface. If this were to happen, the plow blade would cut even harder to the road surface. as a result of backward bending or rotation, the plow blade moves downwardly from its normal position, since the angle between the plow blade and the road is about 55 "to 70". almost as low as the blade blade 4, which Thus, the elasticity of the blade 4 takes place mainly in the vertical direction and more precisely in the plane of the body 2 as indicated by the arrow in Fig. 2.

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Figures 3 and 4 show another reversible plow blade assembly according to the invention. In the figures, the same reference numerals as above are operatively used for the same parts. Fig. 3 is a front view of the plow blade, and Fig. 4 is a sectional view 15 taken along line IV-IV in Fig. 3. In the case of Fig. 3, the three frames shown in Fig. 1 are replaced by four separate bodies 2, which are secured to each of the 20 separate bodies 2 by means of a part made of resilient material. , then the bodies 2 are detached from the plow and ', fixed in the opposite direction so that the previously raised blade disc 4 is lowered.

Γ *; Also in Figures 5 to 10 of functionally identical parts I have the same reference numerals as above. In the embodiments of Figs. 1-4, the blade plate itself functions as a consumable blade, but in the embodiments shown below, the blade plate 4 is fastened with a quick-release fastener. . for the separately worn part. The flexible member shown in Figure 5 ♦ # 30 enables quick installation by attaching it to the * 5 \ holes 5 in the mounting holes 7 and to the motherboard of the plow 1 and:: attaching the corresponding quick-mounting bolts • *: different options illustrated 6-8. In Fig. 6, the wearable blade is formed by a second »» · 35 resilient member 6 ', such as the elastic member 6, thereby providing a greater overall elasticity. Fig. 7 shows a conventional cutting blade 4 'for attachment to the elastic member 6. Because the separate elastic members 6 allow the individual blades 4 'to adapt to the road surface, these wear considerably more slowly than before. Fig. 8 shows the spike blades 4 'for attachment to the elastic member 6. The figure also shows a cross-section of the elastic member 6 at the mounting openings. The elastic member 6 comprises, as above, a blade plate 4 of the body 2 and a resilient material 3 which binds them. The body 2 is fastened to the mother plate of the plow 1 by means of quick-mounting bolts 8. To this end, the body 2 has holes 5 This mounting opening 7 extends through the blade plate 4 into the resilient material, freeing up the space required for mounting the bolt 8 10. The opening 5 is square as well as the bolt arm, which makes it easy to fasten the fixing nut. On the opposite side, there is a similar mounting opening 7 'which extends through the body 2 and the resilient material up to the blade plate 4 having a square hole 15' of the same type. The wearable blade section, here the spike blade 4 ', is fastened with a bolt 8' to the blade disc 4. As shown, the thickness of the resilient material 3 is small compared to its height to prevent the blade disc 4 from rotating with respect to the body 2. Such a construction forces the blade plate 4 to move substantially upwards in the body 2. The thickness of the flexible material should be no more than 1/4, but most preferably 1/10 to 1/5 of its height. '·· 1 Thinking about four meters apart, the working width is individually; the width of the elastic members should not exceed 1 m, but preferably 40-80 cm. With a 20 cm high elastic piece; : 25 gives 15mm total elasticity when flexible rubber vulcanization; thickness is about 20 mm.

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The loading of the resilient material can be reduced, in particular, the high loads by the use of a slide member to which a '30 motion limiting stop can be attached. The slide member 4 of Figs. 9 and 10 is positioned in the elastic member 6. In Fig. 9, the blade disc 4 as well as the resilient material is thought to have been removed so that the skate member 10 is fully visible. The skate device 10 comprises a rail 11 attached to the frame 2 and a skate 12 fitted thereon. 35 which is attached to the blade plate 4. The stops 13 and 13 'are likewise attached to the body 2. The former includes a rubber elastic member 14 which softens the stop. The stops 13 and 13 'limit the displacement of the slide 12 and thus the blade disc 4 and prevent overloading of the resilient material 3.

The accompanying figures and the description related thereto are intended only to illustrate the present invention. The details of the plow according to the invention may vary within the scope of the appended claims. The plow blade assembly according to the invention can therefore also be used, for example, in plows, blades, washers, graders and the like, although the plow blade assembly according to the invention has been described above for use mainly in plowing snow on roads. Furthermore, it should be noted that although it has been described above that there is only one part made of resilient material between the bar and the body, this part can, of course, be replaced by several separate resilient parts. Also, the number of individual blades and body parts may vary as needed to obtain the desired work pattern, such as a groove for polishing (planing) of a polant.

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Claims (7)

A plow blade arrangement, preferably in a snow plow, which plow (1) is intended to be mounted on a vehicle, preferably a tractor or truck, wherein the plow blade arrangement comprises a frame (2) consisting of a pian part detachably fixed to the plow (1), several leaf plates (4) covering the desired working width divided into separate and independent parts, and flexible fastening elements (3) for fixing the leaf plates (4) to the frame (2) and the retention of vulcanized or other flexible material between the frame and the leaf plates; characterized by the flexible:; the elements (3) are one-sided layers on each leaf plate and raised. . sending substantially uniform thickness of at most 1/4, most preferred. 25 l / 10 - 1/5 of their height, which layers are arranged to allow movement of the blade plates (4) substantially only in one direction in *! ! the direction of the surface of the frame (2), when the blade plate (4) hits an obstacle or pit. »» » Plow blade arrangement according to claim 1, characterized in that the arrangement includes a stop (13) which restricts the movement of the leaf plate component (4). > · « 3. Plow blade arrangement according to claim 2, characterized in that the stop (13) is designed flexibly in such a way that when the blade plate (4) approaches the outer position its movement requires increasing force. . 9 114654 Blade arrangement according to claim 1 or 2, characterized in that the arrangement comprises a plurality of separate flexible elements (6), each comprising a frame (2), a flexible element (3) and a leaf plate ( 4). 5 5. Blade Arrangement In accordance with any of claims 1-4, characterized in that it comprises wear elements (10) which force the blade plate (4) to move only along a desired path. 6. Blade arrangement In accordance with one of claims 1-5, characterized in that the frame (2) and / or the blade plate (4) comprises a fastening arrangement consisting of fastening heels (5, 5. with bolts or other fastening elements, and tions apertures (7, 7 ') 1 in opposition plate and in the flexible element (3). Blade arrangement 1 according to claims 1-6, characterized in that the working width of the independent flexible blade plates is at most 1 m, most preferably 40-80 cm. 20! ! · T i m * * * • · • • • · · »it I f * · • a I ·» • · a • a a a • a