SUPPORT DE PARTIE ARRIERE POUR VEHICULE POUR CHARGES LOURDES POURVU D'UN DISPOSITIF DE CHARGEMENT AUTOMATIQUE

REAR SUPPORT FOR A HEAVY GOODS VEHICLE WITH AN AUTOMATIC LOADING DEVICE

Abrégé français

L'invention concerne un véhicule pour charges lourdes comprenant un dispositif de chargement automatique pour charges lourdes, disposé sur un châssis de véhicule, dont l'extrémité dépasse au-dessus d'une roue arrière et présente, sur le dessous, un dispositif de support servant au support de la partie arrière sur une plaque de fond (20) pouvant être sortie hydrauliquement. Le véhicule selon l'invention se caractérise en ce que le dispositif de support comporte deux carters stables (4, 5), à savoir un carter extérieur (4), qui est intégré au châssis du véhicule, et un carter intérieur (5), fermé, qui entoure un vérin hydraulique à l'aide duquel ce carter intérieur (5) peut être déplacé dans le sens de son axe (A).

Abrégé anglais

The invention relates to a heavy goods vehicle with an automatic loading
device for heavy loads, which is arranged on the frame of said vehicle, whose
end protrudes above a rear wheel and which is provided with a support device
underneath to support the rear part of the vehicle on a hydraulically
extendible base plate (20). The invention is characterized in that the support
device has two stable casings (4, 5). One external casing (4) is built into
the frame of the motor vehicle, and an inner closed casing (5) surrounds a
hydraulic cylinder with which the inner casing can be moved in the direction
of the axis (A) of the casing.

Revendications

-5-
Claims
1. Heavy-duty vehicle with an automatic loading device (22) for heavy loads
which is arranged on a vehicle frame whose end (13) projects out over a rear
wheel
(23) and has, at its underside, a supporting device (2, 2a) with two stable
housings (4,
5) for supporting the rear on a bottom plate (20) which can be moved out
hydraulically,
characterized in that an outer housing is integrated in the vehicle frame (13)
and an
inner, closed housing (5) encloses a hydraulic cylinder (7) by means of which
the inner
housing is movable in the direction of the housing axis (A).
2. Heavy-duty vehicle according to claim 1, characterized in that the inner
housing (5) is closed at the bottom by means of a welded-on bottom plate (20).
3. Heavy-duty vehicle according to claim 1 or 2, characterized in that the
bottom plate (20) has front and rear skids (16) at least in the longitudinal
direction of the
vehicle.
4. Heavy-duty vehicle according to one of the preceding claims,
characterized in that the piston rod {9) is supported in the inner housing (5)
so as to be
swivelably movable by means of an integrated articulated bearing (10).
5. Heavy-duty vehicle according to one of the preceding claims,
characterized in that the inner housing (5) is guided in the outer housing (4)
by sliding
plates (6).
6. Heavy-duty vehicle according to one of the preceding claims,
characterized in that the cylinder (7) is held inside the vehicle frame (13)
by pins (8) in
the outer housing (4).

Description

CA 02294302 1999-12-14
REAR SUPPORT FOR A HEAVY GOODS VEHICLE WITH AN AUTOMATIC
LOADING DEVICE
Description
The invention is directed to a heavy-duty vehicle with an automatic loading
device for heavy loads which is arranged on a vehicle frame whose end projects
out
over a rear wheel and has, at its underside, a supporting device for
supporting the rear
on a bottom plate which can travel out hydraulically.
DE 36 05 665 C2 discloses a vehicle of the generic type which is provided for
lifting, transporting and tipping a slag vessel or the like provided with side
trunnions and
has a swiveling frame at the rear, by which the slag vessel can be raised or
lowered in a
swiveling manner on the vehicle over the rear and which has a hydraulic
actuating
member behind the rear wheel below the frame for a jib base which can be
supported
on the ground.
These two rear supporting devices under both lateral ends of the vehicle are
required to ensure the stability of the vehicle during the movement of the
heavy load. In
the device of the generic type, the piston rod, when in the moved out state,
is exposed
to the hostile influences in the metallurgical plant, e.g., slag sprays, acid
rain and the
like, and can therefore be severely damaged to the point of blockage. The
bottom plate
is fastened to the piston rod eye so as to be movable in a swiveling manner
and can
therefore tilt.
The construction of the supporting device as a separate structural component
part which is welded on or screwed on to the vehicle frame makes it necessary
in most
cases to switch off the vehicle drive or traveling mechanism of the vehicle
when the
support is moved out in order to prevent damage when advanced unintentionally.
However, as a result of switching off the traveling mechanism, the vehicle can
no longer
be driven away with the support extended, even in emergencies.
Therefore, the invention is based on the problem of providing an improved
supporting device which is adapted to operating conditions.

a
CA 02294302 1999-12-14
-2-
According to the invention, this problem is solved by the features of
protective
claim 1. Further features of the invention are indicated in the subclaims.
The solution according to the invention provides a supporting device which has
two stable housings which are displaceable one inside the other in a
telescoping
manner, wherein the outer housing is integrated directly in the vehicle frame
and
accordingly achieves a very high stability. An inner housing with sliding
plates which
can be arranged on the inner housing as closing plates slides in the outer
housing, but
is constructed as a stable welded construction or is formed of correspondingly
joined
steel plates. The inner housing encloses the hydraulic cylinder which enables
the
movability of the inner housing relative to the outer housing in the
longitudinal direction
of the two housings. A hydraulic cylinder which is protected in this way
remains
operational over a long period and its weakest part, the piston rod, can not
be bent by
external force.
According to a further feature of the invention, the inner housing is closed
at the
bottom by means of a pre-welded bottom plate which is arranged horizontal to
the
undercarriage frame. Therefore, the bottom plate cannot be tilted away by a
small
obstacle such as a rock, but is pressed onto the ground in the predetermined
position.
In the longitudinal direction of the vehicle, the bottom plate has front and
rear
skids, so that the bottom plate and/or the cylinder cannot be torn off when
the vehicle is
advanced unintentionally; rather, the support base can slide over obstacles.
In order to take into account assembly errors or bending loads in the event of
overloading, the piston rod is supported by its eye as a swivelably movable
element in
the inner housing with correspondingly stable eye bolts.
The cylinder itself is held inside the vehicle frame, that is, at the stiffest
part, by a
stable, integrated bolt which can also be constructed as an integrated double-
bolt. The
hydraulic lines can also be reliably guided in the vehicle frame by means of
the
integration of the housing in the vehicle frame.
The invention will be explained more fully with reference to the schematic
drawings.

CA 02294302 1999-12-14
-3-
Figure 1 shows a side view with a partial section through the supporting
device;
Figure 2 shows a section along the longitudinal axis of the supporting device
according to Figure 1;
Figure 3 shows a supporting device according to the invention which is
integrated in the vehicle frame of a slag transporter.
Figure 3 shows a heavy-duty vehicle, in this case a slag transporter with a
driving
head 21 and a loading platform 3 on an undercarriage 23 for transporting a
slag vessel
1. The drawing shows the state before the vessel has been loaded by the
vehicle by
means of the automatic loading device 22 in that the swiveling device 22 is
moved
about the swivel joint 15 and can accordingly deposit the vessel 1 behind the
vehicle. A
supporting device is moved out of the driving position 2 into the unloading
position 2a
on the ground before the swiveling movement is initiated, so that the rear of
the vehicle
is supported and the vehicle cannot be tilted about the axis of the wheel 23.
Figure 1 is an enlarged view of the supporting device 2. An outer housing 4 of
steel plates is integrated in the vehicle frame end 13 and, in addition, is
fixedly
connected with a gusset plate 12 and the solid bearing plate 14 for the swivel
bearing
15 of the swiveling device 22. An inner stable housing 5 of steel plate which
is movable
in the direction of the housing axis A by means of a cylinder 7 (Figure 2) is
integrated in
the outer housing 4. The inner housing 5 is closed toward the ground by a
bottom plate
20 which has skids 16 at the front and back. Sliding plates 6 are screwed to
the inner
rectangular housing, so that the inner housing 4 is supported in the outer
housing 5 in a
sliding manner. The hydraulic lines 18 for the cylinder 7 and the automatic
loading
device 22 are guided in the vehicle frame and are accessible through an
inspection flap
19 in the vehicle frame and in the outer housing 4.
Figure 2 shows a section along the longitudinal axis A through the two
housings.
The piston rod 9 has an integrated articulated bearing 10 which is supported
via a pin
AMENDED SHEET

CA 02294302 1999-12-14
-4-
11 in the inner movable box-like housing 5. The cylinder 7 is held at the
vehicle end via
pins 8 in the outer box girder or outer housing 4. The cylinder is protected
in its position
on all sides against environmental influences even when the inner housing is
moved out
into position 2a (Figure 3).

Dessin représentatif