Rack replacement bracket

Abstract

The utility model relates to a rack replacement bracket (10), which is used for simultaneously receiving and conveying a plurality of racks of a rolling machine, the rolling machine is used for rolling metal rods, wires or pipelines, the rack replacement bracket (10) comprises a plurality of rack seats (16), one of the racks can be individually received in each of the rack seats (16), and the rack seats (16) are arranged on the rack seats (16). The stand change carriage (10) comprises a plurality of steerable wheels (20) for transporting the stand on a guide rail or along a guide-less rolling mill floor, and comprises at least one hydraulic motor (21) operatively connected to at least one of the wheels (20) for driving the wheels.

Description

Field of the Invention

[0001] The utility model relates to a frame replacement carriage for simultaneously receiving and transporting a plurality of frames of a rolling mill for rolling metal bars, wires or pipes. Background Art

[0002] For rolling metal bars, wires or pipes, rolling mills are generally used, which include a plurality of frames arranged one above the other in the rolling direction. The frames in turn contain actual rollers that apply the rolling force to the material to be rolled in order to form metal bars, wires or pipes from the material.

[0003] During operation, the rollers wear out and must therefore be refurbished at regular intervals. For this purpose, the frames including the rollers to be refurbished must be removed from the rolling mill and transported to the frame shop. After refurbishing the rollers, the respective frames must then be transported back to the rolling mill from the frame shop and inserted into the rolling mill. In addition, for rolled products of different thicknesses, different frames are required, the calibers of which have been preset to the desired thickness of the respective rolled product.

[0004] To exchange frames in a rolling mill, frame replacement carriages are used in a known manner, which can simultaneously receive a plurality of frames and reliably transport the frames between the rolling mill and the frame shop. As described, for example, in DE 102014015 963A1, in this case, in principle, a distinction can be made between two different types of frame replacement systems in which different frame replacement carriages are used.

[0005] In a well-known first frame replacement system, the frame replacement carriage does not have its own drive device but is moved by means of one or more external control cable systems. For this purpose, the control cables and the traveling trolleys fastened thereto are introduced under the mill floor, which forms the base on which the wheels of the frame replacement carriage travel. The replacement carriage can be attached to the traveling trolley by means of a coupling rod and can be moved by the control cables. In this system, the frame replacement carriage is rail-mounted, and it is known that in addition to a first rail extension section extending parallel to the rolling mill, a second rail extension section is provided that is positioned perpendicular to the rolling mill. At the switch connecting the two extension sections, the frame replacement carriage can be switched between the extension sections by pivoting the wheels by approximately 90°. Thus, for example, if the frame replacement carriage is temporarily parked on the transverse track, the sequence of the frame replacement carriages in front of the rolling mill can be changed. In this system, the choice of which frame replacement carriage should be returned to the frame shop or moved to the rolling mill is relatively free.

[0006] In this type of situation, since the stand replacement carriage does not have any drive axes, the control cable system recessed into the mill floor allows for a lower mounting height of the stand replacement carriage. In particular, wheels pivotable by approximately 90° can also be easily implemented. However, this is at the cost of increased space requirements under the mill floor, as a plurality of required components of the control cable system (such as coupling and decoupling stations, cable tensioners, and switch actuator) must be accommodated here. In particular, this is disadvantageous when the rolling mill is located in the upper level of the rolling mill, as the ceiling height of the lower level must be significantly reduced in the area of the control cable system, which results in structural-technical complexity. In addition, in this concept, the complexity of the control cable system increases very rapidly with the number of stand replacement carriages to be moved and the guide rail extension sections, and it is less adaptable to structural changes in the rolling mill or the stand workshop.

[0007] In the second type of stand replacement system, the stand replacement carriage has a direct electric drive for one or more wheels. A stand replacement system including such a stand replacement carriage can in principle be better expanded, as the control cable system in the rolling mill can be omitted. However, the power supply lines are still connected to these "self-propelled devices" with cable carriers to ensure the supply of necessary control signals and power to the electric motors. Due to the cable carriers, such stand replacement carriages are also only used for cable installation, with only one cable carrier provided per track extension section, and thus only one carriage has its own drive device. In addition, the need for very long lines makes it actually very difficult to move the stand replacement carriage directly to the remote stand workshop. Therefore, the removed stand must be carefully and time-consuming reloaded from the stand replacement carriage onto a different transport member already near the rolling mill, as the space near the rolling mill is usually small due to other structural reasons.

[0008] In addition, in practice, only those second-type rack replacement carriages are used, which can only move in the forward and backward directions and cannot move laterally. Therefore, the sequence of the rack replacement carriages along the rolling mill cannot be changed, and it is impossible to park this type of rack replacement carriage in the second row in front of the rolling mill until the second row is used. The reason why there is no electrically driven rack replacement carriage that can change its traveling direction is due to the available installation space. Due to the size of the electric motor and its drive unit being large enough, the wheel arches of the second-type rack replacement carriage require more space compared to the first type. Nevertheless, in order to design the rack replacement carriage to be as compact as possible overall, the wheels are therefore placed in the intermediate space provided between the rack seats. However, it is no longer possible to position the electric drive device with bevel gears in this limited space, and the gears can pivot with the wheels in order to thus allow an immediate change in the traveling direction. In other words, the space requirement for the wheel arches of the rack replacement carriage would be too large. A lateral clearance must also be provided around the rack replacement carriage, and when the wheels are pivoted, the drive unit consisting of the electric motor and the gearbox can extend into the lateral clearance. However, it would be disadvantageous if the distance between the rack replacement carriage and the rolling mill is too large when the rack is inserted into the rolling mill. Another reason is the need for electrical supply lines. As in the control cable system, after being transferred to another track extension section, the rack replacement carriage would have to be immediately connected to a different cable carrier, which is associated with additional technical complexity. In addition, it must be ensured that the cable carriers of the individual track extension sections are not damaged when crossing the rack replacement carriage. Summary of the Utility Model

[0009] In this context, an object of the present utility model is to provide a rack replacement carriage with a drive concept in the above technical field, which can be used more flexibly than those in the prior art. Specifically, an object of the present utility model is to provide a rack replacement carriage that can change its traveling direction. Specifically, an object of the present utility model is to provide a rack replacement carriage that can be used in as many different workshops as possible in as multifunctional a manner as possible. Specifically, an object of the present utility model is to provide a rack replacement carriage that can be used as autonomously as possible.

[0010] A rack replacement carriage for simultaneously receiving and transporting a plurality of racks of a rolling mill for rolling metal rods, wires or pipes includes: a plurality of rack seats, in each of which one of the racks can be individually received; and a plurality of steering wheels for transporting the racks along a guide rail or a rail-less rolling mill floor plate.

[0011] The rack replacement carriage includes at least one hydraulic motor, which is operatively connected to at least one of the wheels to drive the wheels.

[0012] The hydraulic motor is characterized by its high drive torque. Thus, in particular, the hydraulic motor is suitable for moving a heavy frame replacement carriage. In addition, compared to an electric motor with a similar torque, the hydraulic motor provides a more compact design. Thus, the use of a hydraulic motor has the potential to keep the size of the wheel arch relatively small. For example, if it is possible to pivot the wheel by means of bevel gears mounted on the wheel, then compared to a non-pivotable wheel driven by an electric motor, the space requirement of the wheel arch will not increase further despite the additional components.

[0013] In addition, the small space requirement of the hydraulic motor has the potential to make the assembly height of the frame replacement carriage according to the present utility model above the rolling mill floor comparable to that of a known frame replacement carriage driven by control cables. Thus, the present utility model has the potential to provide a steerable and self-propelled frame replacement carriage. Thus, the frame replacement carriage does not depend on an external drive device and also does not depend on a guide rail system, and can thus be used in a more functional way than the frame replacement carriages known in the prior art.

[0014] In an advantageous embodiment, the hydraulic motor is a radial piston motor or an axial piston motor. These types of motors and especially the radial piston motor among the two have a particularly compact design and allow the steerable frame replacement carriage to have a particularly low assembly height. In particular, a radial piston motor operating at low speed has a very compact design and especially has a very small extension in the longitudinal direction. The extension is preferably less than 0.2 m. In this context, the longitudinal direction means the direction extending along the axis of rotation of the radial piston motor. If such a motor is used, the pivotable drive unit can be implemented by a hydraulic motor and a wheel, which requires a small wheel arch and small clearances around the frame carriage for pivoting.

[0015] Preferably, each of the wheels is associated with and operatively connected to one of its own at least one hydraulic motors. For the sake of a compact design, it is possible to provide a separate hydraulic motor for each wheel. This in turn multiplies the driving force on the frame replacement carriage. It is also conceivable to replace a single large motor with a relatively large space requirement and which makes the minimum assembly height of the frame replacement carriage necessary, with a plurality of smaller hydraulic motors having the same overall driving force, each of the hydraulic motors having a small space requirement. Thus, the minimum assembly height can be reduced. Due to the small size of the hydraulic motor, in particular the radial piston motor, in this preferred embodiment it is possible to make each of the drive wheels steerable without requiring a large amount of space. However, as an alternative, it can also be arranged that not each of the wheels is provided with its own hydraulic motor.

[0016] Preferably, all of the wheels are designed to be steerable so as to change by at least 30° or more, and more preferably by 90° or more, in the direction of travel. The stand changing carriage including such wheels can not only move along the forward and backward directions, but can immediately take a different direction, specifically a direction perpendicular to the original direction of travel. As a result, the stand changing carriage can be maneuvered in a particularly simple and space-saving manner and can also be operated in a very tight environment. Thus, a plurality of stand changing carriages can be located in front of the rolling mill in any desired arrangement in a very tight space. However, as another option, it is also possible that only some of the wheels are steerable or can be steered through a smaller steering angle. Thus, the alignment of the rolling mill with respect to the stand changing carriage can be set.

[0017] In this case, the contact surface of the stand base on which the stand stays after being received in the stand changing carriage is spaced 50 cm or less, preferably 40 cm or less, more preferably 30 cm or less, and even more preferably 20 cm or less, from the rolling mill floor plate. In this way, in the case of a conventional stand, it is possible to ensure that the lowest point of the stand just moves above the rolling mill floor plate. However, as another option, in order to convey the stand at a low height, the rolling mill floor plate can also be provided with a depression, or the stand can be lifted to a higher contact surface by means of a crane or the like and conveyed at this height.

[0018] In a conventional bar rolling mill, the rolling line extends at a height of approximately 0.9 m to 1.1 m above the mill floor, and sometimes even lower. Accordingly, the lower side of the housing is typically only located approximately 0.2 m to 0.3 m above the mill floor. Therefore, in the region of its housing receiving position, it is desirable that the mounting height of the replacement carriage not be higher. According to this preferred feature, since the contact surface of the housing with the mill floor, where the housing rests after being received in the housing replacement carriage, is spaced 40 cm or less, the housing replacement carriage can advantageously be used in existing rolling mills without the need for laborious adjustment of the rolling mill or the mill floor. In some cases, the lowest point of the housing is a downwardly projecting coupling part. The coupling part determines the lowest point. According to the above advantageous feature, the housing replacement carriage is designed such that the coupling part is located at only a small safety distance from the ground. However, not all housing designs have the downwardly projecting coupling part, and thus for these housings, a lower contact surface than in the case of housings having this kind of downwardly projecting coupling part is also possible. A low contact surface is advantageous, particularly if it is intended to replace a control cable-based housing replacement system, and here, due to structural circumstances, the height of the rolling mill above the mill floor is small. However, as an alternative, the contact surface of the housing placed thereon can also be designed to be higher.

[0019] Preferably, the housing replacement carriage includes a steering drive for steering at least two, preferably all, of the wheels. A housing replacement carriage of this kind can operate in a rail-mounted manner or without rails. Thus, in the case of operation without rails, it is possible to manoeuvre the housing replacement carriage and fix its travel direction by corresponding positioning of the steering drive. In the case of a rail-mounted housing replacement carriage, the steering drive is advantageous because a switch between two track extensions no longer needs to be provided with its own switch actuator to effect steering of the wheels. However, the wheels of the housing replacement carriage can also be steered passively without a steering drive, for example by the rails.

[0020] Preferably, the steering drive includes a chain drive. In this way, a central input for the steering drive can be easily distributed to each steerable wheel of the housing replacement carriage. However, as an alternative, the steering drive can also be designed in a different way - in particular, a plurality of drive devices can be provided, each of which steers one wheel.

[0021] Further preferably, the steering drive includes a spindle. The spindle can be incorporated into the chain drive. The spindle can ensure that self-locking of the steering drive becomes possible.

[0022] In an advantageous embodiment, the at least one hydraulic motor together with its associated wheel is deflectable about a steering axis. Thus, the motor and the wheel form a steerable drive unit in this way. The ring gear is non-rotatably mounted on the drive unit, and the ring gear (for example, the gear of the steering drive device) can be engaged into the drive unit to form a gearbox. In this way, the wheel can be steered immediately without applying a large force.

[0023] Preferably, when viewed from above, during the operation of the stand replacement carriage, one of the stand seats is arranged between at least two of the wheels. As a result, the assembly height of the stand replacement carriage in the region of the stand seats can be kept particularly low because the assembly height is not restricted by the space requirements of the wheel arches. Thus, it is possible to push the stand from a very low stand base of the rolling mill onto the stand seats of the stand replacement carriage without having to overcome a significant height difference.

[0024] Preferably, the stand replacement carriage includes an energy source, specifically a battery, in order to supply energy to the at least one hydraulic motor. This kind of configuration makes the stand replacement carriage independent of an external energy source. Thus, it is possible to completely omit providing supply lines on the stand replacement carriage, specifically cable carriers for cables and the like, and the stand replacement carriage is thereby unrestricted in its radius of movement. However, external energy supply is also possible in principle.

[0025] Advantageously, the at least one hydraulic motor is part of a closed hydraulic circuit including a pump, and the hydraulic circuit is preferably designed without a reservoir. If the hydraulic motor is present in a closed circuit including a pump, then pressure can be applied to the hydraulic fluid circulating in the hydraulic circuit within the closed system in order to operate the hydraulic motor. Then, for example, it is not necessary to provide a pressure vessel on the stand replacement carriage that has to be constantly inflated from the outside. Thus, an autonomously operating stand replacement carriage can be achieved. Omitting the reservoir allows for a particularly compact design. However, providing a reservoir is also advantageous.

[0026] Preferably, a battery-operated electric motor is mounted on the stand replacement carriage in order to supply hydraulic pressure to the at least one hydraulic motor and thus drive the motor. This particularly preferred embodiment constitutes a powerful, emission-free and autonomously operating variant of the stand replacement carriage. In this case, the electric motor can be mounted at a point on the stand replacement carriage that does not impair the assembly height of the stand seats. This also applies to the battery.

[0027] Preferably, the stand replacement carriage is provided with an inductive charging mechanism. If a rechargeable battery is used as the energy carrier for powering its electrical components, then the battery can thus be charged in a contactless manner. For example, it is conceivable to manipulate the stand replacement carriage equipped in this way in the charging zone strip of the rolling mill or the stand workshop, in which the mating part of the inductive charging mechanism is present in or on the ground when the stand replacement carriage is to be charged. This charging zone strip can also be provided directly on the rolling mill in order to use points with particularly high energy requirements and at the same time relatively long residence times. As a result, the battery can be of small size.

[0028] The stand replacement carriage preferably includes a wireless data gearbox device for controlling the stand replacement carriage. As a result, commands and parameters for its operation can be transmitted from an external control system to the stand replacement carriage. For example, it is conceivable that the stand replacement carriage moves in a remotely controlled manner and as required between different positions in the rolling mill, in the stand workshop and / or between the rolling mill and the stand workshop. In this case, the control can be carried out fully or partially autonomously. For example, it is conceivable that in an automated process, when the monitoring system identifies a stand replacement or finds it necessary to replace, a stand replacement carriage is provided in the stand workshop or the rolling mill.

[0029] Further preferably, the data gearbox device is configured such that it preferably transmits one or more operating states of the stand replacement carriage to the control system and / or other stand replacement carriages. Without being limited to this, the operating states can include the charging state of the battery, the state of the stand loaded, and the position of the stand replacement carriage. This allows the stand replacement carriage to operate fully autonomously as an "automated guided vehicle" or "autonomous mobile robot". Thus, multiple stand replacement carriages can directly and / or indirectly exchange their operating states with each other via the control system so that the states can also be taken into account during control.

[0030] Preferably, the stand replacement carriage includes at least four stand seats.

[0031] Therefore, many rolling mills are designed such that they include four stands arranged one behind the other along the rolling direction. Thus, it is particularly advantageous to also provide four stand seats for the stand replacement carriage so that in the case of such stand bases, the stand replacement carriage can be used to simultaneously exchange all the stands.

[0032] Preferably, the stand seats are designed for receiving stands having a hexagonal outer shape when viewed along the rolling direction of the stand. However, as an alternative, the stand seats can also be designed for receiving stands of different shapes, such as conventional stands having a square outer shape.

[0033] Specifically, in the case of a hexagonal housing, but in principle also in the case of a square housing, the coupling portion of the roll shaft (by means of which the rolling torque is introduced onto the roll shaft) extends obliquely downwards and extends to the side from which the housing is exchanged. For this arrangement, the housing replacement carriage described above can make an additional contribution to machine safety, because if the housing replacement carriage remains in the housing base during the operation of the rolling mill, then the housing replacement carriage covers these coupling portions during the operation of the rolling mill.

[0034] Further advantages and developments of the present utility model appear in the description of the following figures and all the claims. Description of the Drawings

[0035] Figure 1 is a perspective side view of a preferred housing replacement carriage.

[0036] Figure 2 The preferred housing replacement carriage shown from the opposite side Figure 1 thereof.

[0037] Figure 3 The preferred housing replacement carriage is shown from above.

[0038] Figure 4 The preferred housing replacement carriage is shown from below.

[0039] Figure 5 is a side view of a preferred housing replacement carriage with a housing seat occupied by a housing. Detailed Description of the Preferred Embodiment

[0040] Figure 1 The preferred housing replacement carriage 10 for receiving four housings is shown. For this purpose, the housing replacement carriage 10 is equipped with four housing seats 16 which are designed to individually receive a housing. Figure 1The view shows one side of the stand replacement carriage facing the rolling mill during stand replacement. Each of the stand bases 16 includes a recess 18 in the body 11 of the stand replacement carriage 10 and a sliding guide 17 on either side of the recess 18 in each case. On the sliding guides 17, the respective stand can be pushed into or lifted onto the stand replacement carriage 10. These pairs of sliding guides 17 thus form the contact surfaces for the stand housing of the received stand, and the recess 18 provides space for the part of the stand protruding from the stand housing (e.g., the coupling part of the rolling shaft). Between the stand bases 16, the stand replacement carriage 10 includes (i.e., a total of three) intermediate spaces 28 in each case. As will be described further below, additional components (especially the wheels 20) are arranged in the intermediate spaces 28 on the underside of the stand replacement carriage 10. On the upper side, the outer intermediate spaces 28 further accommodate components of the steering drive under the cover 27, as will be explained in more detail below.

[0041] Figure 2 The stand replacement carriage 10 is shown from its opposite side. The recess 18 is closed towards this side, such that the stand replacement carriage has a substantially uniform assembly height except for the structures on the intermediate spaces 28 and in its rear and front regions. In this embodiment, a hydraulic pump 32 is attached at one side, which is driven by an electric motor 33. In principle, the hydraulic pump 32 and / or the electric motor 33 can be accommodated at other points of the stand replacement carriage 10. However, the attachment on the side shown is advantageous because these components do not cause an obstruction when approaching the rolling mill. The hydraulic pump 32 supplies pressurized hydraulic fluid to the hydraulic system of the stand replacement carriage 10.

[0042] Furthermore, a chain drive 22 is provided on one side. The chain drive 22 is part of the steering system that will be described in more detail below and is used to distribute the central input of the steering drive to all the steerable wheels of the stand replacement carriage.

[0043] Figure 3 The stand replacement carriage 10 is shown from above. In this view, the cover 27 above the two outer intermediate spaces 28 is removed. Thus, the view of the spindle rod 25 is free, which is arranged in the intermediate space 28 in each case. The spindle rod 25 includes a spindle 26 divided into two parts. A sprocket 34 is non-rotatably mounted on the spindle rod 25 towards the side of the chain drive 22, and the chain drive 22 engages into the sprocket. The spindle 26 meshes with an upper gear 29 in each case, which in turn drives a shaft 31 positioned perpendicular to the plane of the drawing.

[0044] Figure 4The rack replacement carriage 10 is shown from below. In this view, the recess 18 is now a raised portion of the body 11 of the rack replacement carriage 10. There is sufficient space in the intermediate space 28 to accommodate the drive units 24, each of which includes a wheel 20 and a hydraulic motor 21. The hydraulic motor 21 is incorporated into the hydraulic system of the rack replacement carriage 10 in a conventional manner in the art. For the sake of clarity, the necessary hydraulic lines are not shown. Generally speaking, the rack replacement carriage 10 includes four structurally identical drive units 24, and in each case, two drive units share one of the intermediate spaces 28. In this embodiment, the hydraulic motor 21 of the drive unit 24 is designed as a radial piston motor, and the radial piston motor is less than 20 cm in size in the longitudinal direction. Therefore, the drive unit 24 is generally very compact. In addition, a ring gear 23 is mounted on the drive unit 24. Each drive unit 24 can rotate about a steering axis perpendicular to the plane of the drawing together with its ring gear 23. Due to the compact design, the drive unit 24 can rotate about 360° around the steering axis, and although there is a small intermediate space 28, the drive unit will not collide with the body 11 of the rack replacement carriage 10. Therefore, the travel direction of each wheel 20 can be set as required, and as a result, the rack replacement carriage 10 can immediately execute any desired change in the travel direction. In Figure 3 the position shown, all the wheels 20 are perpendicular to the longitudinal direction of the rack replacement carriage, along which the rack is arranged. In the position shown, the rack replacement carriage can thus move from one side towards the rolling mill. The lower gear 30 meshes with the ring gear 23 of each drive unit, so that the corresponding drive unit 24 rotates about its steering axis through the rotation of the lower gear 30. Therefore, a total of four such lower gears 30 are provided, and the lower gears are part of the steering drive of the rack replacement carriage 10. Each lower gear 30 is connected to the associated upper gear 29 via a shaft 31 and is thus connected to the chain drive 22. The mechanism is adapted to synchronously steer the wheels 20 in the aligned direction during the operation of the chain drive 22. However, embodiments are also conceivable in which, additionally or alternatively, in each case only the two wheels 20 that share the intermediate space 28 or are arranged on one side of the rack replacement carriage 10 can be steered independently of the other two wheels 20. Therefore, the rack replacement carriage 10 can be rotated in an effective manner, for example. Preferably, for this purpose, the rotation directions of the individual hydraulic motors can also be set differently from each other. The chain drive 22 can be hydraulically driven, and for this purpose, the chain drive 22 is incorporated into the hydraulic system, but it is also possible to use an electric motor for driving.

[0045] A battery 35 or a battery pack is arranged in the central intermediate space 28, and the battery or battery pack supplies power to the electric motor 33 and other components. The rack replacement carriage 10 shown can thus travel completely autonomously.

[0046] Figure 5 The preferred housing replacement carriage 10 in the case of housing replacement is shown from the side facing the rolling mill. In the viewing direction, the housing 13 is received on the left - hand side housing seat 16. Obviously, the coupling part 15 of the housing 13 protruding from the housing shell 14 finds space in the recess 18 of the housing seat 16. In this view, the rolling - mill base plate H including the guide rail S embedded therein is also outlined, on which the wheels 20 of the housing replacement carriage roll. In this embodiment, the assembly height B of the housing seat 16 (i.e., the distance between the contact surface of the housing seat 16 and the rolling - mill base plate H) is 39 cm.

[0047] List of reference signs

[0048] 10 Housing replacement carriage

[0049] 11 Body

[0050] 13 Housing

[0051] 14 Housing shell

[0052] 15 Coupling part

[0053] 16 Housing seat

[0054] 17 Slide guide

[0055] 18 Recess

[0056] 20 Wheel

[0057] 21 Hydraulic motor

[0058] 22 Chain drive

[0059] 23 Ring gear

[0060] 24 Drive unit

[0061] 25 Spindle rod

[0062] 26 Spindle

[0063] 27 Cover

[0064] 28 Intermediate space

[0065] 29 Upper gear

[0066] 30 Lower gear

[0067] 31 Shaft part

[0068] 32 Hydraulic pump

[0069] 33 Electric motor

[0070] 34 Sprocket wheel

[0071] 35 Battery

[0072] H Rolling mill base plate

[0073] S Guide rail

[0074] B Assembly height.

Claims

1. A stand changing bracket (10) for simultaneously receiving and conveying a plurality of stands (13) of a rolling mill for rolling metal rods, wires or pipes, characterized in that: The rack replacement bracket (10) includes a plurality of rack seats (16), wherein one of the racks (13) is individually receivable in each of the rack seats (16), The rack changing carriage (10) comprises a plurality of steerable wheels (20) for transporting the rack (13) on rails (S) or along a railless rolling mill floor (H), The rack change bracket comprises at least one hydraulic motor (21) operatively connected to at least one of the wheels (20) for driving the wheel.

2. The rack replacement bracket (10) according to claim 1, Features The hydraulic motor (21) is a radial piston motor or an axial piston motor.

3. The rack replacement bracket (10) according to claim 1 or claim 2, Features Each of the wheels (20) is associated with its own at least one hydraulic motor (21) and is thus operatively connected to the at least one hydraulic motor.

4. The rack replacement bracket (10) according to claim 1 or 2, Features At least two of the wheels (20) are steerable so as to perform a change in direction of travel of at least 30° or more.

5. The rack replacement bracket (10) according to claim 4, Features The wheels (20) are all steerable.

6. The rack change bracket (10) according to claim 4, Features The change in direction of travel is at least 90° or more.

7. The rack replacement bracket (10) according to claim 1 or 2, Features The contact surface of the frame base (16) has an installation height (B) of 50 cm or less above the rolling mill floor (H).

8. The rack replacement bracket (10) according to claim 7, Features The contact surface of the frame base (16) has an installation height (B) of 40 cm or less above the rolling mill floor (H).

9. The rack replacement bracket (10) according to claim 1 or 2, Features The rack change bracket (10) comprises a steering drive for steering at least two of the wheels (20), The steering drive device comprises a chain drive device (22).

10. The rack change bracket (10) according to claim 9, Features All the wheels (20) are turned.

11. The rack change bracket according to claim 9, Features The at least one hydraulic motor (21) together with its associated wheel (20) forms a drive unit (24) which is pivotable about a steering axis and on which the ring gear (23) is non-rotatably mounted.

12. The rack change bracket (10) according to claim 1 or 2, Features At least one of the rack seats (16) is arranged between at least two of the wheels (20) during operation of the rack change bracket (10), viewed from above.

13. The rack change bracket (10) according to claim 1 or 2, Features The rack change bracket (10) comprises an energy source, in particular a battery (35), in order to supply energy to the at least one hydraulic motor (21).

14. The rack change bracket (10) according to claim 1 or 2, Features The at least one hydraulic motor (21) is part of a closed hydraulic circuit comprising a pump (32), The hydraulic circuit is designed without a tank.

15. The rack change bracket (10) according to claim 1 or 2, Features A battery-operated electric motor (33) is mounted on the frame change bracket (10) to supply hydraulic pressure to the at least one hydraulic motor (21) and thereby drive the motor.

16. The rack change bracket (10) according to claim 1 or 2, Features The rack replacement bracket is provided with an inductive charging mechanism.

17. The rack change bracket (10) according to claim 1 or 2, Features The rack change bracket includes a wireless data gearbox device for controlling the rack change bracket (10), wherein the data gearbox device is further configured to transmit an operational status of the rack change bracket (10).

18. The rack change bracket (10) according to claim 1 or 2, Features The rack replacement bracket (10) includes at least four rack seats (16).

19. The rack change bracket (10) according to claim 1 or 2, Features The stand seat (16) is designed to receive a stand (13) which has a hexagonal outer shape when viewed along the rolling direction of the stand (13).

Images