The invention relates to a mudguard for motor vehicles, particularly for mobile working machines, having a dirt catcher that partly covers the running surfaces of wheels, and having attachment means for fixing the dirt catcher in place on a location of the working machine that is fixed on the chassis.
Mudguards of this type stated initially are particularly intended for mobile concrete pumps, pump mixers, and mobile conveyor belts that are mounted on truck chassis. In the case of mobile working machines, important aspects are, in particular, ease of installation, weight, the surface treatment, and corrosion behavior. Known mudguards of this type predominantly consist of sheet aluminum. They are structured as complicated welded constructions, which require complex surface coating with powder priming and a subsequent varnishing process. In addition, there is the not insignificant installation effort on the chassis.
Proceeding from this, the invention is based on the task of developing a mudguard of the type indicated initially, which is characterized by low weight and by relatively little effort in production and installation.
To accomplish this task, the combination of characteristics indicated in claim 1 is proposed. Advantageous embodiments and further developments of the invention result from the dependent claims.
The solution according to the invention is essentially seen as being that the mudguard is configured as a self-supporting hollow-chamber component made of plastic, which has a dirt catcher part and a flange part connected with it in one piece, whereby the flange part has multiple crosswise perforations disposed in raster-like manner relative to one another. It is advantageous if the crosswise perforations are configured as hollow crosspieces that extend between two hollow-chamber walls that are parallel to one another. In order to allow easier installation and equalization of tolerances, it is practical if the crosswise perforations are configured in the manner of an oblong hole, in their outline. Fundamentally, it is possible that the flange part is configured to be solid in the region of the crosswise perforations.
A preferred embodiment of the invention provides that the flange part has an essentially rectangular installation surface, through which the crosswise perforations penetrate, and that the dirt catcher part follows the flange part at a longitudinal edge, and is angled away, relative to it, at an obtuse or right angle, whereby the flange part and the dirt catcher part are reinforced on their underside, with rib chambers that extend beyond the longitudinal edge and are formed into the hollow-chamber component, doming out towards the underside. Using these measures, it is possible to absorb great bending forces between the flange part and the dirt catcher part, without the risk of breakage. To further increase the shape stability, according to a preferred embodiment of the invention, the flange part and/or the dirt catcher part are provided with edge chambers on their outer edges, projecting towards the underside, in each instance, formed into the hollow-chamber component. In addition, reinforcement beads can be formed into the upper delimitation walls of the flange part and/or of the dirt catcher part.
In order to allow stable and breakage-safe installation, the attachment means have at least one pressure plate equipped with spacer sleeves, whereby the spacer sleeves pass through at least one part of the crosswise perforations situated in the flange part, in the fixed state, pressing the pressure plate against the flange part, and are fixed in place on the chassis by means of threaded pins and threaded nuts. To achieve an additional shape fit, it is practical if the flange plate, on its underside, has recesses formed into the related hollow-chamber delimitation wall, adapted to the contour of the pressure plates, whereby the crosswise perforations penetrate the lower hollow-chamber delimitation wall in the region of the recesses.
According to a further advantageous embodiment of the invention, threaded inserts for attaching a mud flap are let into an edge zone of the dirt catcher part.
The invention furthermore relates to a mobile working machine, particularly a mobile concrete pump, having a chassis and platforms affixed to the chassis, whereby the platforms consist of hollow-profile rails that have undercut longitudinal grooves, open towards the bottom, for accommodating T-nuts provided with threaded bores or pins (EP 1 355 820 B1). It is advantageous if the mudguards according to the invention are connected with the threaded bores or pins of the T-nuts disposed in the longitudinal grooves, with their attachment means. In this case, installation of the mudguards proves to be particularly simple. It is possible to use existing attachment means in the region of the hollow-profile platforms of the working machine.
The measures according to the invention ensure that the mudguards can be used as standard components of mobile working machines, which are optimized with regard to standardization, modularity, production and installation effort, ease of installation, weight, surface treatment, corrosion behavior, and design. The mudguards, which consist of solid-color plastic, do not require any kind of surface treatment. The prepared crosswise perforations in the flange parts, which are configured as oblong holes, allow position-precise installation. When using similar hollow-profile platforms on different types of working machines, the same mudguards can be used on different machine models. In this way, a high degree of standardization is obtained, with the lowest possible inventory.
In order to allow right-side and left-side installation of the mudguards, the flange part and the dirt catcher part are structured with mirror symmetry with reference to a vertical center plane.
In the following, the invention will be explained in greater detail using an exemplary embodiment shown schematically in the drawing. This shows:
a and b a top view and a bottom view of the mudguard, in a schematic representation, in each instance;
a to d a broad-side view, a bottom view, a top view, and a narrow-side view of the mudguard according to
a and b sections along the section lines A-A and B-B of
a to c a broad-side view, a narrow-side view, and a top view of an attachment plate equipped with spacers, as an attachment means for the mudguard; and
a to c two sections, perpendicular to one another, through the attachment flange, as well as an enlarged detail from
In the drawing, the mudguards according to the invention are shown for the example of a mobile concrete pump. The mobile concrete pump shown in
In the case of the exemplary embodiment shown in the drawing, the mudguards 38 are furthermore fixed in place on the hollow-profile rails 30 with attachment means 40 and the T-nuts 35 (cf.
The mudguard 38 shown in
To fix the mudguard in place on the hollow-profile rails 30 of the platforms 22, attachment means 40 are provided, which, according to
Multiple threaded inserts 72, disposed in a row, which are intended for fixing a mud flap 74 in place, are let into a lower edge zone 70 of the dirt catcher part (
In summary, the following should be stated: The invention relates to a mudguard 38 for motor vehicles, particularly for mobile concrete pumps. The mudguard 38 has a dirt catcher 42 that partly covers the running surfaces of wheels of the mobile working machine, as well as attachment means 40 for fixing the dirt catcher in place on a location of the working machine that is fixed on the chassis. According to the invention, the mudguard 38 is configured as a self-supporting hollow-chamber component made of plastic, which has a dirt catcher part 42 and a flange part 44 connected with it in one piece, whereby the flange part 44 has multiple crosswise perforations 46 disposed in raster-like manner, for accommodating the attachment means 40.
Number | Date | Country | Kind |
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10 2006 017 766.5 | Apr 2006 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2007/002230 | 3/14/2007 | WO | 00 | 9/19/2008 |