WO2011009692A1

WO2011009692A1 - Converter transport vehicle

Info

Publication number: WO2011009692A1
Application number: PCT/EP2010/059017
Authority: WO
Inventors: Jürgen KELLER
Original assignee: Hubtex Maschinenbau Gmbh & Co. Kg
Priority date: 2009-07-24
Filing date: 2010-06-24
Publication date: 2011-01-27
Also published as: EP2456711B1; DE202009005058U1; EP2456711A1

Abstract

The invention relates to a converter transport vehicle (100, 200) having a motorized chassis (1) and a lifting unit (4) arranged on the chassis (1) comprising a converter carrier (8), wherein the lifting unit (4) is designed as a pivot hoist (5) that is preferably arranged in the rear region on the chassis (1) viewed in the forward travel direction (V).

Description

Converter transport vehicle

The invention relates to a converter transport vehicle.

For the purposes of this document, the term "converter" refers to a container which is used in the metal industry, in particular steelmaking, and which is transported filled with liquid metal The converter transport vehicle is exposed to a high level of heat.

For the transport of the converter usually find use of forklift trucks, which include a mast and a movable along this fork carriage.

A problem with the use of these forklifts is that the thermal load that is exposed to the forklift, especially in the provision of the converter and the filling of the same, can lead to increased wear or even damage. In addition, when filling the converter always resulting splashes of liquid metal can settle on the mast and so obstruct the displacement of the fork carriage or even impossible. The invention is therefore based on the object to provide a converter transport vehicle, which is better suited for the transport and the provision of converters. This object is achieved by the reproduced in claim 1 converter transport vehicle.

It comprises a motor-driven chassis and arranged on the chassis lifting unit, which includes a converter carrier. The converter carrier can correspond approximately to a fork carriage of a prior art forklift truck. However, it is also possible to use specially adapted to the converter to be transported converter carrier.

The lifting unit is inventively designed as Schwenkhubwerk. When lifting or lowering the converter, unlike in the prior art, the converter carrier no longer slides on sliding surfaces of the lifting mast, but instead

Lifting motion is primarily by pivoting components around

Swivel axes caused, but can be shielded without great technical effort against the ingress of impurities, especially molten metal splashes.

The Schwenkhubwerk is preferably arranged in the rearward direction on the chassis seen in the forward direction. In this way, on the one hand, a lifting operation can be carried out just in front of the front wheels of the vehicle in a manner similar to a conventional forklift, on the other hand, the force can be introduced into the chassis approximately in the area of the rear wheels, whereby on the opposite side of the vehicle only lower counterweights to avoid that the rear wheels lift off the ground, must be provided. As a result, the converter transport vehicle according to the invention can be designed to be lighter than a conventional forklift truck with the same payload, which has a positive effect on the driving characteristics, the energy consumption and the tire / axle loads of the vehicle. In a preferred embodiment, the swivel lifting mechanism comprises a mast, which is pivotably connected to the chassis about a first horizontal axis, and on which the converter carrier is pivotably arranged about a second axis parallel to the first axis. To raise and lower the converter, the mast is then pivoted about the first horizontal axis.

In order to avoid that during the pivoting of the mast, the converter with tilted, in other words tilted, the converter transport vehicle according to the invention preferably erecting means which synchronously the converter carrier during pivoting of the mast about the first axis and by the same angular amount, but in opposite Rotate the direction of rotation.

In order to make the first and second axes of Schwenkhubwerks particularly insensitive to external influences, in particular against temperature stress and impurities, the first and second axes are preferably defined by pin / sleeve bearings known type. Clamping sets may be provided to compensate for e-play.

In order to effect the pivoting movement of the mast, a linear motor is preferably provided between the chassis and the mast, which may be designed in particular as a hydraulic cylinder.

A variant of the converter transport vehicle according to the invention has a mast with a fixed length. During lifting and lowering, the converter then describes a circular arc whose radius corresponds to the distance of the converter from the first axis. The alignment means, which prevent tilting of the converter when lifting or lowering, then comprise a running between the chassis and the converter carrier parallel to the mast train / push rod assembly, which is pivotally connected to the chassis and with the converter carrier connected.

In a further, particularly preferred embodiment of the converter transport vehicle according to the invention, the mast is variable in length. The mast can for this purpose in particular at least two in the longitudinal direction of the mast having relatively displaceable mast parts, wherein the first mast part is pivotally articulated to the chassis, and pivotally connected to the second mast part of the converter carrier. In order to effect a relative movement between the mast parts and a pivoting movement of the converter carrier, a displacement motor acting between the two mast parts and an alignment motor are preferably provided. Is beyond - as particularly preferred - a control or regulating device provided which controls the linear, the displacement and the alignment during pivoting of the mast about the first axis such that the converter carrier in a stationary chassis substantially on a vertical Straight line, the path that the converter describes when lifting and lowering corresponds, at least almost exactly, to that which he would follow with the help of a forklift in the usual way when lifting and lowering. A familiarization of familiar with a conventional forklift operator is due to this measure is not required.

In order to further improve the operational reliability of the converter transport vehicle according to the invention, shield arrangements are provided which protect the motors against heat and contaminants. When the motors are hydraulic cylinders, these shield assemblies comprise in cross-section substantially circular sleeves of heat radiation-reflecting material, for example reflecting sheets, which are pushed individually or telescopically into engagement with each other on the respective hydraulic cylinder and at least substantially shield it. Very particularly preferred is a development of the converter transport vehicle according to the invention, in which the rear wheels are steered. The steering movements of the rear wheels can be mechanically decoupled from each other by a respective rear wheel associated steering motors are effected, as is also known from other trucks. Thus, the invention Converter transport vehicle is particularly agile and thus suitable for use in confined spaces, the rear wheels can be steered so that the steering center is located approximately between two unguided front wheels of the converter transport vehicle. As a result of this measure, it is possible to turn about a vertical axis which intersects the common axis of rotation of the front wheels approximately centrally therebetween. This development of the converter transport vehicle according to the invention is characterized in particular by a very high maneuverability. Due to the greater maneuverability, the length of the converter transport vehicle can be increased, if the local conditions of the area of application allow it, which in turn has a positive effect on the center of gravity shift when lifting and lowering a converter.

In the drawing, two embodiments of the converter transport vehicle according to the invention - are shown schematically. Show it:

Figures 1 to 5 are side views of the first embodiment in different lifting stages of a converter.

6 shows a schematic view of this vehicle from below in a position of the rear wheels, which makes it possible to rotate the vehicle about an axis lying between the front wheels, as well as FIG

7 and 8, a second embodiment of the converter transport vehicle according to the invention, once with lowered converter (Fig. 7), the other times with raised converter (Fig. 8).

The illustrated in Figures 1 to 6, the first embodiment of the converter transport vehicle 100 according to the invention comprises a motor-driven chassis 1 with a cab 2, in which the vehicle can be operated by a traveling person 3 person.

On the chassis 1, a lifting unit 4 is arranged. It is designed as Schwenkhubwerk 5, which is seen in the forward direction of travel V arranged in the rear region on the chassis 2. The swivel lifting mechanism 5 comprises a mast 6, which is articulated about a first horizontal axis A pivotably via a base 7 on the chassis 1. A converter carrier 8, which serves to transport a converter 9, is pivotable about a second axis B parallel to the first axis A (see in particular FIG.

For lifting the converter support 8, a linear motor 11 (see in particular FIG. 4) designed as a hydraulic cylinder 10 is provided. The hydraulic cylinder 1 1 is at one end about a parallel to the first and second axes A, B extending axis C pivotally mounted on the chassis 1, the other end about a likewise parallel to the first and second axes A, B extending axis D to the mast 6.

In order to accomplish an at least almost vertical Hublinie H, the mast 6 is formed in two parts. It comprises an outer part 12 and an inner part 13 which engages telescopically in the outer part 12. Between the two mast parts 12, 13 acts a displacement motor 14, indicated only in FIG. 2, by means of which the mast part 13 moves in and out with respect to the mast part 12 can be.

In addition, the converter carrier 8 comprises a not recognizable in the drawing in detail alignment motor 15 by means of which the converter carrier 8 can be displaced about the second axis B. The linear motor 11, the displacement motor 14 and the alignment motor 15 are controlled by a control device not visible in the drawing such that upon pivoting of the mast 6 about the first axis A of the converter carrier 8 synchronously about the second axis B by the same angular amount, but in the reverse Turning sense is pivoted, so that the converter 9 always remains in its upright position. Synchronously, the displacement motor 14 is acted upon in such a way that the movement component generated by a circular arc-shaped movement is compensated parallel to the ground, symbolized by the double arrow X in FIG. 4. To make the converter transport vehicle 100 less sensitive to heat and dirt, the outer hydraulic cylinder 10 is surrounded by a shield arrangement 17 designed as a splash guard tube 16. The chassis 1 of the converter transport vehicle 100 has two unguided, only revolving front wheels 18. These are surrounded over part of their extent by a heat shield 19.

Furthermore, the converter transport vehicle 100 comprises two rear wheels 20, which are guided mechanically decoupled from one another and which are driven by wheel motors 21. Due to the displacement of the wheel motors 21 to the rear wheels 20, a large distance to the converter 9 side facing the vehicle is accomplished. The thermal load of the drive motors 21 is thereby reduced.

As can be seen in FIG. 6, the steered rear wheels 20 can be brought into a position in which the steering center L lies approximately centrally between the two front wheels 18. The converter transport vehicle 100 is characterized by a particularly great maneuverability due to this measure.

The exemplary embodiment of a converter transport vehicle 200 according to the invention which is illustrated by way of example in FIGS. 7 and 8 differs substantially from the previously described converter transport vehicle 100 in the construction of the mast 6. This has a fixed length, so that the converter carrier 8 during lifting not a straight line H, but a circular arc K (see Fig. 8) follows. In order for the converter carrier 8 to always remain in its upright position, the mast 6 comprises a pull / push rod arrangement 22 which is spaced apart from the first axis A by a distance Z from the base 7 and by a pivot lever 23 at a distance from the second axis B from the converter carrier 8 is articulated. LIST OF REFERENCES:

100, 200 converter transport vehicle

1 chassis

2 cab

3 person

4 lifting unit

5 swivel lifting mechanism

6 mast

7 sockets

8 converter carrier

9 converters

10 hydraulic cylinders

11 linear motor

12 part

13 part

14 displacement motor

15 alignment motor

16 splash guard tube

17 shield arrangement

18 front wheels

19 heat protection

20 rear wheels

21 drive motors

22 stroke / push rod arrangement

23 pivot lever

A first axis

B second axis

C axis

D axis

H hub line

K circular arc

L steering center

V Forward direction

X double arrow

Z distance

Claims

claims:

1. converter transport vehicle (100, 200),

with a motor-driven chassis (1),

and with a lifting unit (4) arranged on the chassis (1) and comprising a converter carrier (8),

wherein the lifting unit (4) is designed as a swivel lifting mechanism (5) which, viewed in the forward direction of travel (V), is preferably arranged on the chassis (1) in the rear region.

2. converter transport vehicle according to claim 1, characterized in that the Schwenkhubwerk (5) comprises a mast (6) which is hinged about a first horizontal axis (A) pivotally mounted on the chassis (1), and at which a to first axis (A) parallel second axis (B) of the converter carrier (8) is pivotally articulated.

3. Converter transport vehicle according to claim 1 or 2, characterized in that alignment means are provided, which during pivoting of the mast (6) about the first axis (A) the converter carrier (8) synchronously by the same angular amount, but in opposite rotational sense to the pivot the second axis (B).

4. converter transport vehicle according to one of claims 1 to 3, characterized in that the first and second axes (A, B) are defined by bolt / bushings bearings.

5. converter transport vehicle according to one of claims 2 to 4, characterized in that between the chassis (1) and the mast (6), a linear motor (11) is provided.

6. converter transport vehicle according to claim 5, characterized in that the linear motor (11) is a hydraulic cylinder (10).

7. converter transport vehicle according to one of claims 2 to 6, characterized in that the mast (6) has a fixed length.

8. converter transport vehicle according to claim 7, characterized in that the means of suspension between the chassis (1) and the converter carrier (8) parallel to the mast extending train / push rod assembly (22) articulated to the chassis (1) and with the converter carrier (8) is connected.

9. converter transport vehicle according to one of claims 2 to 6, characterized in that the mast (6) is variable in length.

10. converter transport vehicle according to claim 9, characterized in that the mast (6) at least two in the longitudinal direction of the mast (6) relative to each other displaceable mast parts (12, 13), wherein the first mast part

(12) pivotally connected to the chassis (1) is articulated, and on the second mast part (13) of the converter carrier (8) is pivotally mounted.

11. converter transport vehicle according to claim 10, characterized in that between the two mast parts (12, 13) acting displacement motor (14) is provided and the alignment means comprise an alignment motor (15).

12. converter transport vehicle according to claim 11, characterized in that a control or regulating device is provided which the linear, the displacement and the alignment motor (1 1, 14, 15) during pivoting of the mast (6) to the first Axis (A) controls or regulates such that the converter carrier (8) with stationary chassis (1) is displaced substantially on a vertical Hublinie (H).

13. Converter transport vehicle according to one of claims 5 to 12, characterized in that shield assemblies (17) are provided which protect the motors against heat and impurities.

14. Converter transport vehicle according to one of claims 1 to 13, characterized in that two steered and preferably rotationally driven rear wheels (20) are provided.

15. Converter transport vehicle according to one of claims 1 to 14, characterized in that the rear wheels (20) are steerable such that the steering center (L) is located approximately between two unguided front wheels (18).