FI112688B - snowplow - Google Patents

Description

112688

FIELD OF THE INVENTION

The invention relates to a snow plow as defined in the preamble of claim 15.

BACKGROUND OF THE INVENTION

A snow plow is known from DE 3914423. The snow plow includes a first frame 10 attached to the plow vehicle frame in the forward direction and a second frame connected to the plow blade. There is an arm arrangement between the first and second frame members to allow the second frame member to pivot about the first frame member 15 about a horizontal pivot axis. The spring is arranged to resist the downward rotation of the second body relative to the first body. The spring force of the spring can be adjusted. According to DE 3914423, the adjustment of the spring force is effected by adjusting the spring elongation by attaching the spring-20 to its various positions with pin-hole attachment.

The problem with the known solution is that the adjustment of the spring force by the pin hole mounting is; ; very cumbersome and time consuming.

'* 25 PURPOSE OF THE INVENTION

«; The object of the invention is to eliminate the above disadvantages.

In particular, it is an object of the invention to provide a snow plow having a spring force of a relief spring that is infinitely adjustable and easier; simpler.

SUMMARY OF THE INVENTION

The snow plow according to the invention is characterized by what is set forth in claim 1.

2 112688

According to the invention, the snow plow includes a boom device articulated at its lower end to a first body pivotable about a horizontal axis and having an upper end of the boom device extending over the second body.

5 The spring is fixed at the top end to the boom unit and at the bottom end to the other frame or to a part attached thereto. In addition, the snow plow includes a pivot limiter for adjusting the boom device to different positions relative to the first frame for adjusting the spring tension.

An advantage of the invention is that it makes stepless adjustment of the spring force of the spring easier and simpler. By adjusting the angular position of the boom device, the spring can be adjusted to provide a suitable elongation, i.e., a spring force that supports the second frame and its attachments 15 so as to reduce strain on the plow and vice versa by suitably selected relief such as blade wear, plow fuel consumption, noise levels and wear on road markings are reduced. 20 The cost savings to be achieved are considerable.

In one embodiment of a snow blade, the spring force of the spring is adapted so that the weight exerted by the blade on the road surface is not more than about 70%, preferably not more than 50% of the weight that 25 blades would exert on the road surface without of the total weight.

: In one embodiment, the snow plow is a conventional type of standard snow plow 30 having a blade road surface weight without spring in the range of about 1,100 to 1,200 kg, the spring spring force being adapted to provide a blade road surface weight of about 800 kg, preferably up to 600 kg.

: ·: 35 In one embodiment of a snow plow, the arm arrangement comprises a pair of pivot arms 3126888, which are pivotally pivotable from one end to the first body at a distance from one another and pivotally from one end to another.

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LIST OF FIGURES

In the following, the invention will be described in detail by way of an exemplary embodiment with reference to the accompanying drawing, which is a schematic view from 10 sides of a first embodiment of a Snow plow according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

Figure 1 shows the so-called. a front snow plow comprising a first frame 1 mounted on a plow vehicle front body. A plow blade 4 with a blade 3 is connected to the second frame 2 and the second frame 2 is connected to the first frame by an arm arrangement 5 which allows the second frame part 2 to pivot about the first frame part 1 about horizontal pivot axes a, b. The arm assembly 5 includes a pair of pivot arms 14, 15, an upper first pivot arm 14 and a lower second pivot arm 15 forming a pivot mechanism, each pivotally pivoted from one end to the first body • 1 at a distance from one another and pivotally pivoted to the second body away from each other.

In the embodiment of Figure 1, the snow plow includes a boom-30 device 7 that is pivotable to the first frame 1 to pivot about a horizontal axis c. The position of the boom device 7 can be adjusted by means of a pivoting stop 12 to different positions. At the upper end of the boom device 7 is a spring 6, which is a tension spring and preferably 35, for example a coil spring, as shown in Fig. 1. The lower end 11 of the spring 6 is connected to the second body 2.

4, 112688

By adjusting the position of the boom device 7, a suitable elongation, i.e. a spring force, is applied to the spring 6 which carries the second body 2 and the devices attached thereto.

In the snow plow of Figure 1, the spring force of the spring 6 is adjusted so that the weight exerted by the blade 3 on the road surface is not more than 70%, preferably not more than 50% of the total weight of the second body, plow, blade 10 and other devices in the second body. . When the snow plow is a conventional type front snow plow having a blade 3 impact on the road surface without a spring 6 of the order of about 1,100 to 1,200 kg, the spring 6 has a spring force adjusted to allow the blade 3 to hit the road surface up to about 800 kg, preferably up to 600 kg. A suitable weight is about 400 to 500 kg.

The spring 6 may be any suitable spring known per se, such as mechanical, hyd-20 roller, pneumatic or a combination thereof. A simple mechanical spring, such as a coil spring, is advantageous, not only because of its cheapness, but also because it is able to adapt quickly to strikes from a plow steel, unlike a hydraulic spring.

From the measurements made for the snow plow according to the invention, it can be deduced about a 40% reduction in blade wear when compared with a conventional blade in a light plow versus a non-light plow. With lighter plowing and conventional blades 30, compared to current practice, a carbide blade achieves approximately € 275 in cutting costs per treatment period with one road maintenance truck. Throughout the winter season, Tieliikelaitos would save about € 70,000 on blade cost dolls. With 35 lighter blades, a savings of about € 430 per treatment truck per road maintenance truck is achieved. Throughout the winter season, Tieliikelaitos would achieve savings of approximately € 108,000 at 112688 5 blade costs. By using skids in the plow, you save about 58% on your blade costs when you include your shaving costs in your blade costs. Excluding skids, the cost of cutting 5 is reduced by about 38%.

Volume reduction in light plow was measured on a dry road surface at plowing speeds of 60 km / h and 80 km / h. Sound pressure level in the lorry truck cab during light plowing decreased from 10 to 5.5 dB (A). The plow according to the invention, using conventional blades, would safely reach below the dangerous sound pressure level in all plowing operations.

The reduction in fuel consumption was estimated based on measurements taken. With lighter plowing, you save about € 150 on fuel costs per treatment truck per day. A savings of approximately € 37,000 would be achieved throughout the winter service during the winter season. Fuel-20 real estate savings are estimated to be low due to the large dispersion of measurement results. In practice, it is likely that fuel savings will be significantly higher.

Plowing consumes and breaks road markings. Lightening of the Au-25 also affects the durability of road markings. The surface pressure on the road is • directly proportional to the plow relief. As the surface pressure decreases,. road markings remain in good condition for longer.

The invention is not limited to the above exemplary embodiments, but many other embodiments are possible within the scope of the inventive idea defined by the claims.

Claims (4)

A snow plow, comprising: - a first frame (1) which is fixed to the front of the frame by a plowing vehicle advanced in the direction of travel, - a second frame (2), being a plow vane (4), provided with a bite, is joined; and - an arm assembly (5) which is between the first and second frame members to allow pivoting relative to the first frame portion around a horizontal pivot shaft (a, b), and - a spring (6) whose spring force is arranged to oppose downward oscillation of the second frame in relation to the first frame, characterized in that the snow plow comprises a boom device (7) which is adapted from its lower end (8) to the first frame (1). ) to pivot about a horizontal shaft (c) and the upper end (9) of the boom assembly 20 extending on the second frame (2); that the spring (6) is attached from the upper end (10) to the boom assembly (7) and from the lower end (11) to the second frame (2) or to any of the attached members; and that the snow plow includes a pivot limiter (12) for adjusting the boom assembly to various positions relative to the first frame for regulating the tension of the spring (6). Snow plow according to claim 1, characterized in that the spring force of the spring (6) is> arranged so that the weight which the bite (3) points to the road surface is at most 70%, preferably at most 50% of the weight which, without the influence of the spring, would be directed from the bite to the road surface by the total weight of the second frame, the plow wing, the bite and other devices on the other, the frame. Snow plow according to claim 1 or 2, characterized in that where the snow plow is a standard snow plow of the usual type, the weight of which its bite (3) points to the road surface without a spring (6) would be of the size class 1,100 - 1,200 kg, is the spring force of the spring (6) arranged so that the weight that the bite 5 (3) points to the road surface is at most about 800 kg, preferably at most 600 kg. Snow plow according to any one of claims 1 to 3, characterized in that the arm device (5) comprises a pair of pivoting arms (14, 15) forming a articulation-latching mechanism, preferably a articulated parallel log frame mechanism, which from one end is pivotally adapted to it. the first frame (1) spaced from one another, and from the other end pivotally adapted to the second frame (2) spaced from each other. 15