Receptacles – Sectional – Electrical housing
Reexamination Certificate
1999-07-14
2001-04-10
Pollard, Steven (Department: 3727)
Receptacles
Sectional
Electrical housing
C220S004210, C220S004260
Reexamination Certificate
active
06213327
ABSTRACT:
The invention relates to a container for a rail vehicle for the installation of electrical and electronic equipment according to the preamble of claim
1
. The container according to the invention may be used in particular for accommodating converter equipment.
In the case of rail vehicles, in particular in the case of short-distance vehicles, it is generally known to install converter equipment and associated components in a container, which is fitted in the underfloor region, in the roof region or in a machinery space of the vehicle. The generally known containers are composed of individual metal sheets, in which case costly constructions are necessary in order to ensure the requisite mechanical stability and tightness against moisture and dust.
DE 2424722 B2 discloses a casing for equipment in electrical metrology and telecommunications engineering, in which casing a shell, consisting of the side parts, the casing base and the top side, or a part of the shell is formed from strip. The strip has transverse slots, which reduce the strip thickness down to a small material web and subdivide the strip into strip sections. The strip can be angled in the region of the transverse slots, so that the material webs form casing edges. Furthermore, the strip has continuous longitudinal slots in order to accommodate and retain plate-shaped subracks at the margins, the subracks being arranged between a front plate and a rear panel of the casing. A disadvantage with this known casing is the poor dissipation of the heat which is generated by the electronic components and which in turn impairs the operability of the components. Furthermore, the cabling of the plate-shaped subracks is difficult, since only a little space is available for the cables.
DE 19709460 A1 discloses an outdoor casing for accommodating electronic components, which outdoor casing is composed of an inner casing structure, which encloses the components in a hermitically tight manner, and an outer csing structure, which, with a cavity being formed, is arranged on the inner casing structure. The outer casing structure is formed by hollow-section rails, which are detachably fastened to the inner casing structure. Even though the cavity helps to cool the components, the heat dissipation is still insufficient. In addition, the requisite compactness or small overall size which is necessary for the fitting of the casing in the underfloor or roof region of a rail vehicle is not achieved with the known outdoor casing. In addition, the known type of construction leads to low mechanical stability of the entire casing.
The object of the invention is therefore to specify a container for a rail vehicle for the installation of electrical and electronic equipment of the type mentioned at the beginning which permits improved heat dissipation and nonetheless has the requisite compactness and mechanical stability and tightness against moisture and dust, in which case simple wiring of the electronic components located in the container is to be made possible at the same time.
In combination with the features of the preamble, this object is achieved according to the invention by the features specified in the defining part of claim
1
.
The advantages achievable with the invention consist in particular in the fact that, by the integration of a coolant duct of closed cross section in the extruded section, a very compact construction of the container with at the same time cooling of the components is achieved. The container according to the invention may be installed both in the underfloor region of the rail vehicle and in the roof region as well as in the machinery space and can be handled in an extremely flexible manner with regard to the desired dimensioning (length/breadth/height).
Furthermore, a closed cooling duct which encompasses the container is obtained after the bending of the extruded section. A cooling circuit within the equipment is formed by means of the cooling ducts, in which case the coolant may be pressurized, so that the heat dissipation is intensified.
A further advantage achievable with the invention consists in the fact that additional welding or screwing pionts are omitted due to the bending of the extruded section in the edge regions, which additional welding or screwing points entail the risk of leakages from the interior space of the casing to the environment, as a result of which contaminants are introduced and corrosion is promoted. In addition, the desired high mechanical strength of the container on account of the use of the extruded section having closed cross sections can be achieved at comparatively low cost, in particular when a welded casing composed of individual conventional sheet-metal parts is used by way of comparison. Even in the case of a very flat type of construction, very high mechanical rigidity is obtained. Since only a few welding points are necessary or since welding work may be largely dispensed with if suitable angle pieces are used In the edge region, only very little distortion results during assembly.
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patent: 3950603 (1976-04-01), Brefka
patent: 4111328 (1978-09-01), Eggert et al.
patent: 4202457 (1980-05-01), Tansi
patent: 4944420 (1990-07-01), Adkins et al.
patent: 5303823 (1994-04-01), Niles et al.
patent: 5398833 (1995-03-01), Klauss et al.
patent: 5660297 (1997-08-01), Liu
patent: 24 24 722 B2 (1974-05-01), None
patent: 86 11 965 (1986-03-01), None
patent: 195 45 448 (1995-06-01), None
patent: 197 09 460 (1997-03-01), None
DaimlerChrysler Rail Systems (Technology) GmbH
Pollard Steven
Woodcock Washburn Kurtz Mackiewicz & Norris LLP
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