FI128494B - Plough for road maintenance - Google Patents

Abstract

The road maintenance plow (1) comprises a pin blade arranged in connection with or partially connected to the dozer blade (9) and the dozer blade (9), having a number of pins (13) attached to the pin blade body (10) deviating from each other so that the longitudinal axes of the pins (13) form at least two different angles (a1, a2) so that the pins (13, a2) facing the working direction of the dozer blade (9) make contact with the road surface to be treated earlier than the pins (13, a1) facing further away from the working direction.

Description

FIELD OF THE INVENTION The invention relates to devices and methods used in road maintenance, in particular for removing debris and leveling soils. Technical background Car traffic in particular is causing a frenzy that is still a challenge for road maintenance today. Polante refers to a layer of snow condensed under weight and at least partially frozen, which in practice manifests itself as an icy ridge on the road. In particular, deeper rims can cause unexpected dangers when the car may start throwing or not turn as desired when a tire is left in a turn such as passing the wrong side of a ridge. Removing polant is heavy for road maintenance equipment. Road maintenance plows, more generally sand and snow plows, more particularly area plows, throwing plows, widening plows, articulated plows, butter plows, side plows, base blades, stern blades or snow throwers are now generally equipped with a wear plate to remove the furrow. The road maintenance plow comprises a dozer blade, the wear plate attached to the lower edge of which receives shocks gradually during wear. When the wear plate starts to be worn, it is replaced with a new one before the consuming drive starts to eat the actual dozer blade. A straight blade or groove blade is often used as the wear plate. However, there may be irregularities in the road, N which, when collided, may damage the wear plate to N replaceable conditions from even one collision.

I x One alternative to the wear plate is the so-called using a pin blade. I The pins of the pin blade are attached to the dozer blade with a so-called & 30 pin blade frame. The operating principle of the pins is disclosed in European patent application EP 0 179 034 22.

O> Road maintenance plows have to apply a relatively strong vertical force component to the road. In this case, for example, asphalt irregularities in the road can easily damage the wear plate, especially when driving at road speeds.

The advantage of a pin blade is that if one or a few pins are damaged, it is sufficient to replace the damaged pin instead of replacing the entire wear plate. In very difficult conditions, rotating spike blades are used to remove the spindle. Sah-Ko Oy's Finnish patent 115782 describes a trailed road maintenance device behind a tractor, in which a rotating spike blade breaks the polant. The Raiko & polan breaker of the same company (http://polannepois.fi/esite-pdf/Raiko-esite-2011-eng.pdf) is used in front of a truck or wheel loader, in which case the rotating spike blade breaks the burr and the road blade in a separate snow plow or chassis blade finishes the burr. removal.

However, the Raiko & spreader takes up quite a lot of space, making it virtually impossible to attach it to a tractor with a snow plow (eg area plow) in front, a blade underneath and a snow thrower at the rear. Likewise, attaching such a splitter to a truck with a snow plow in front (e.g., a field plow) and a base blade below is virtually impossible. That's why the video introducing the Raiko & splitter uses a pair of machines, in which the splitter is driven by a tractor that pulls or pushes, followed by a tractor with a road maintenance plow. However, this binds machines and labor.

Therefore, when working with one vehicle, such as a tractor or a truck, it is still necessary to have recourse to a road maintenance plow with N wear plates or a pin blade.

OBJECT OF THE INVENTION The object of the invention is to improve the polanthene release ability of a road maintenance plow I with a pin blade. x a N 30 This problem can be solved with a road maintenance plow according to independent claim 3. > o Advantages of the Invention N than the pins facing further away from the working direction. The inventor has found that this significantly improves the detachability of the road maintenance plow. As one theoretical possible explanation for the improvement in the detachability of the polant, to which the applicant would not like to commit, it can be assumed that the impulses due to vehicle momentum and weight are more uniformly temporally and spatially distributed over the road maintenance plow pin steel over a longer period. In this case, the impulse transmitted to it by the pins first hitting the road surface becomes larger than it would be if all the pins were at the same angle to the road surface. The road maintenance plow is preferably attached to the vehicle by means of support members. In addition, the road maintenance plow preferably further comprises hydraulic turning means for adjusting the angle or vertical position of the pins by changing the angle or height of the dozer blade.

The pin blade body preferably comprises at least two rows of holes or bores in which the pins are mounted, which holes or bores are made in rows at different angles so that the rows run in the longitudinal direction of the elongate pin blade body. In this way, the impulses transmitted to the road surface through the pins can be divided into two cycles. The inventor has found that the detachability of the polant Q is thus significantly better than that of a road maintenance plow with a pin blade according to the prior art N.

0? Preferably, the pins at different angles alternate S in the longitudinal direction of the elongate pin blade body. In this way, the working track of the E 30 road maintenance plow can be improved.

The road maintenance plow is preferably an area plow, a spreading plow, an expanding plow, an articulated plow, a fly plow, a side plow, a blade, a stern plate or a snow thrower or a dozer blade for earthmoving.

DETAILED DESCRIPTION The road maintenance plow 1 shown in the exemplary embodiment of the drawing comprises a pin blade 9 arranged in connection with or partially connected to the block plate 9 and a number of pins 13 attached to the pin blade body 10 deviating from each other so that the longitudinal axes of the pins 13 are at least two the pins 13, a2 facing the working direction of the dozer blade 9 make contact with the road surface to be treated earlier than the pins 13, a1 facing away from the working direction. The road maintenance plow 1 shown in the drawing is fixed to the vehicle by means of support members 8. The road maintenance plow 1 preferably also comprises hydraulic turning means 11 such as at least one hydraulic cylinder or hydraulic cylinder assembly for adjusting the angle or vertical position of the pins 13 by changing the angle or height of the dozer blade 9. The pin blade body 10 shown in the drawing comprises at least two rows of holes or bores in which the pins 13 are mounted. The holes or bores are made in rows at different angles α1, α2 so that the rows run in the longitudinal direction of the elongate pin blade body 10. The pins 13 are fastened in a manner known per se, for example with a washer and a nut, through a part N extending to the opposite side of the pin blade body 10 of the pin 13. The pin blade body 10 can be implemented particularly advantageously, e.g. with a convex or partial rotating surface? so that, for example, the washer and nut can be tightened S.

The pins at different angles α1, α2 can alternate in the longitudinal direction of the elongate pin body 10.

The invention is not to be construed as limited to the appended claims, but is to be construed as including all legal equivalents thereof and combinations of the disclosed embodiments.

Reference number list: 1 polane plow 2 ring 3 frame beam 5 4 hydraulic swivel means 5 base plate 6 hydraulic hose 7 hydraulic hose cover 8 support member 9 dozer blade 10 pin blade body 11 bolt 12 nut 13 pin blade

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Claims (6)

g Patent claims: Road maintenance plow (1), which comprises a push blade (9) and a pin insert arranged in connection with or as part of the push blade (9), is characterized in that the pin insert has a number of pins (13) deflected attached to the pin cut body (10). in relation to each other, so that the longitudinal axes of the pins (13) form at least two different large angles (a1, a2) in relation to the working direction of the push blade (9), because the pins (13, a2) point further forward in relation to the push blade (9 ) working direction makes contact with the road surface to be maintained earlier than the pins (13, al) directed further back in relation to the working direction. Road maintenance plow (1) according to claim 1, which is attached by means of support means (8) in a vehicle (3). Road maintenance plow (1) according to claim 2, which further comprises hydraulic rotating means (11) for adjusting the angle or vertical position of the pins (13) by changing the angle or height of the sliding blade (9). Road maintenance plow (1) according to any one of the preceding claims, wherein the pin cutting body (10) comprises at least two rows of holes or bores, in which the pins (13) are mounted, the holes or bores being made in rows at different angles (a1, a2) , said that the rows run in the longitudinal direction of the elongate pin cutting body (10). Road maintenance plow (1) according to one of the preceding N claims, wherein the pins (10) at different angles (a1, a2) N alternate in the elongate pin cutting body (10)? longitudinal direction. SI 30 6. Road maintenance plow (1) according to any one of the preceding & claims, which is an area plow, a throwing plow, an S expandable plow, a folding plow, a butterfly plow, a side plow, a planer blade, a dozer blade or a snow thrower, or a device> with sliding blade intended for excavation.