Patent Application
20130069353
The invention relates to a mobile work device, particularly a mobile concrete pump, having a chassis, having two front and two rear support booms that can be moved out from a transport position into at least one working position relative to the chassis and have a support leg that can be supported on a substratum, in each instance, raising the chassis, and having a drive unit for controlling work assemblies and/or the support booms.
In the case of mobile concrete pumps, the work assemblies comprise, among other things, a mast block having a distributor mast, as well as a core pump with a material application container. The core pump opens into a feed line, which is guided by way of the distributor mast. Depending on the pump model, the drive unit comprises one or more hydraulic pumps, as well as other ancillary pumps, for example for drive of the stirrer mechanism in the material application container of the core pump. The support booms primarily have the task of supporting the work device in its work position, on the substratum, in all positions of the work assemblies, in reliable and non-tipping manner. Accordingly, the demands on the strength of the support booms are relatively great. For their production, solid beam profiles or hollow-chamber profiles made of steel are usually used. On the other hand, the support booms take up a lot of space on the chassis, at the expense of the effective loading surface.
Proceeding from this, the invention is based on the task of configuring at least a part of the support booms to be lighter, while maintaining their strength and stability, and of structuring them with a space-saving additional benefit.
To accomplish this task, the combination of characteristics indicated in claim 1 is proposed. Advantageous embodiments and further developments of the invention are evident from the dependent claims.
The solution according to the invention proceeds from the idea that at least one of the support booms having a beam profile or hollow chamber profile can be provided with a transverse perforation. It has proven to be particularly advantageous if at least one transverse perforation is disposed in each of the rear support booms. A material saving is achieved by means of the transverse perforation, for one thing. For another, the transverse perforation has a reinforcement function in the support boom, with its perforation walls.
An advantageous embodiment of the invention provides that at least one transverse perforation is configured as a housing that is open on one or both sides and can be closed off by means of a cover, if necessary. An ancillary assembly of the drive unit can be disposed on the housing, for example. The ancillary assembly is preferably configured as a hydraulic cooler of the drive unit, which is predominantly activated hydraulically. It can be connected with a central control fixed in place on the chassis or with the drive unit by way of hydraulic lines, hydraulic hoses and/or electrical cables. Another additional benefit can be achieved in that at least one of the support booms configured as a hollow-chamber profile and having a transverse perforation has a liquid tank formed by the hollow chamber.
According to another preferred embodiment of the invention, the support booms, which are in part provided with transverse perforations, and the work assemblies are disposed on a superstructure frame fixed in place on the chassis.
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 diagrammatic representation of a mobile concrete pump, with a retracted and an extended rear support boom;
The mobile concrete pump shown in
A particular feature of the invention consists in that the two rear support booms 40 are configured as hollow-chamber profile parts, which have a transverse perforation 48 in their front region, having a circumferential perforation wall 50. In this connection, the transverse perforation 48 has not only a weight-reducing function but also a reinforcing function. In the right rear support boom 40, the transverse perforation 48 forms a housing, in which an ancillary assembly 52 is disposed, which is connected with the drive unit 47 by way of hydraulic lines, hydraulic hoses and/or electrical cables, for example. The ancillary assembly 52 is configured as a hydraulic cooler, for example. In the exemplary embodiment shown, the transverse perforation 48 that contains the hydraulic cooler is open on one side, toward the inside, and closed off by a cover 54 on the outside. Fundamentally, one of the transverse perforations 48 can also be used as stowage space, for example for accommodating tool boxes, couplings, two by fours, or the like.
In summary, the following should be stated: The invention relates to a mobile work device, particularly a mobile concrete pump. The work device comprises essentially a chassis 12, two front and two rear support booms 38, 40 that can be moved out from a transport position into at least one working position relative to the chassis 12 and have a support leg 42 that can be supported on a substratum, in each instance, raising the chassis, as well as a drive unit 47 for controlling work assemblies and/or the support booms. A particular feature of the invention consists in that at least one of the support booms 40 having a beam profile or hollow-chamber profile has a transverse perforation 48 that can be configured as a housing for an ancillary assembly 52 of the drive unit, for example.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2010 043 957.6 | Nov 2010 | DE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP2011/068068 | 10/17/2011 | WO | 00 | 11/30/2012 |
