Conveyor system, in particular construction elevator

Abstract

The invention relates to a conveyor system, in particular a construction elevator, the conveyor system comprising a frame and a mobile part which is movable along the frame, wherein: the mobile part having an electrical load, a cable carrier formed by modules is fastened to the frame, a primary conductor is accommodated in the cable carrier, the mobile part has a secondary winding which is inductively coupled to the primary conductor and from which a DC link can be fed that supplies the electrical load, the modules are arranged one behind the other, and each module is interlockingly connected to the next adjacent module.

Description

[0001] Conveyor system, especially construction hoist

[0002] Description:

[0003] The invention relates to a conveying system, in particular a construction hoist.

[0004] It is generally known that a construction hoist has a mobile unit which can be moved along a frame.

[0005] From DE 102006 055253 A1, a conveyor system is known as the closest state of the art.

[0006] A rack and pinion elevator is known from DE 202014 009 760 U1.

[0007] The invention is therefore based on the objective of further developing a conveyor system, whereby the construction of the conveyor system should be simple and quick to implement.

[0008] According to the invention, the problem is solved in the conveyor system according to the features specified in claim 1.

[0009] Key features of the invention in the conveyor system, particularly in the construction hoist, are that the conveyor system comprises a frame and a mobile unit movable along the frame, wherein the mobile unit has an electrical load, wherein a cable carrier formed from modules is attached to the frame, wherein a primary conductor is received in the cable carrier, wherein the mobile unit has a secondary winding which is inductively coupled to the primary conductor and from which an intermediate circuit supplying the electrical load can be fed, wherein the modules are arranged one behind the other, particularly in the direction of movement of the mobile unit, wherein each module is positively connected to the nearest adjacent module.

[0010] A key advantage is the quick and easy assembly of the conveyor system. The modules simply need to be arranged one behind the other, particularly in a vertical direction, to form the cable tray. The primary conductor is housed within the cable tray. This primary conductor is laid out as an elongated current loop and carries a medium-frequency current, allowing the mobile unit, especially its traction motor, to be electrically powered via inductive coupling. An energy storage system, provided by the mobile unit's management unit, can be used for buffering.

[0011] The modular design of the cable tray allows the primary system to be extended as needed. The primary conductor is guided and held within the cable tray.

[0012] In an advantageous embodiment, adjacent modules are connected to each other by means of a tongue-and-groove system, in particular wherein the actuation direction of the tongue-and-groove system is oriented perpendicular to the direction of movement of the mobile unit. The advantage here is that a secure, easily manufactured, positive-locking connection can be achieved.

[0013] In an advantageous embodiment, each module, particularly in the direction of movement of the handset, has a spring designed as a tab and a groove designed as a recess on both sides. The advantage here is that the positive-locking connection is simple and cost-effective to manufacture.

[0014] In an advantageous embodiment, the spring of each module is inserted into a groove, designed as a recess, of the module nearest to that module, with the insertion direction being perpendicular to the direction of movement of the mobile unit. An advantage of this is that the positive-locking connection is easy to establish. In another advantageous embodiment, each module has two springs and two grooves, each designed as a recess. An advantage of this is that a symmetrical connection can be established.

[0015] In a preferred design, each module is manufactured as a plate and / or as an injection-molded plastic part. This design offers the advantage of cost-effective module production.

[0016] In an advantageous embodiment, a capacitor is connected in series or parallel to the secondary winding such that the resonant frequency of the resulting resonant circuit matches the frequency of the alternating current impressed into the primary conductor. An advantage of this is that the inductively transferred power is robust against variations in the distance between the primary conductor and the secondary winding.

[0017] In a preferred embodiment, the resonant circuit is connected to the AC-side terminal of the AC / DC converter, and the intermediate circuit is connected to the DC-side terminal of the DC / AC converter. An advantage of this configuration is that the AC / DC converter allows for voltage adjustment, ensuring that the intermediate circuit maintains a constant target voltage value.

[0018] In an advantageous embodiment, an energy management device makes a braking resistor and / or an energy storage device connectable to the DC link, in particular so that electrical power is passed from the DC link to the energy storage device and / or to the braking resistor, or alternatively, electrical power is passed from the energy storage device to the DC link. It is advantageous that the DC link voltage can be regulated to a setpoint by means of the energy storage device and the braking resistor.

[0019] In an advantageous embodiment, the handset's direction of movement is vertical. It is advantageous that the frame can be extended incrementally by adding another module to the upper end of the cable carrier, thereby extending both the primary conductor and the handset's range of motion. In an advantageous embodiment, the primary conductor is configured as an elongated current loop. It is advantageous that the primary conductor has a forward conductor and a return conductor, which are mounted parallel to each other within the cable carrier. Thus, the secondary winding can be provided on a corresponding flat or E-shaped core, with the central leg of the E directed towards the area between the forward and return conductors.

[0020] In an advantageous embodiment, a feed-in induces the medium-frequency current into the primary conductor, wherein the feed-in comprises a single-phase inverter which includes a gyrator, in particular a four-terminal network constructed from inductors and capacitors. The advantage here is that the medium-frequency current enables a high efficiency in the inductive transmission of electrical power.

[0021] In an advantageous embodiment, each module has a forward conductor section extending in the direction of movement of the handset and a return conductor section running parallel to it, wherein a connecting conductor is attached to the first, forward end in the direction of movement of each module and can be positioned in different ways, which in a first position electrically connects the forward conductor section to the return conductor section and in a second position is spaced apart and / or electrically separated from the forward conductor section and the return conductor section, wherein when a second module is positively connected to a first module, the connecting conductor of the first module is moved from the first position to the second position or is pressed from the first position to the second position by the second module, in particular wherein the connecting conductor is held by means of a deformable plastic section of the module.In particular, which acts as a swivel joint for the connecting conductor. An advantage of this is that when an additional module is attached to the cable carrier, i.e., when the cable carrier is extended, the primary conductor is automatically extended as well, and the end of the primary conductor's current loop is automatically shifted by establishing the positive connection. This is because the previously existing end is severed by disconnecting the first connecting conductor, so that the newly effective end of the current loop, created by the connecting conductor of the second module, is shifted in the direction of movement.

[0022] In an advantageous embodiment, two grooves are arranged at the first end of each module and two springs are arranged at the second end of each module. The advantage here is that sliding the springs onto the module causes a uniform separation of the connecting conductor. Thus, the connecting conductor of the second module then effectively becomes the end and / or termination of the current loop.

[0023] In an alternative advantageous embodiment, two springs are arranged at the first end of each module and two grooves are arranged at the second end of each module. The advantage here is that, when the two grooves of the second module are slid into place, the connecting conductor of the first module is displaced by the material areas of the second module located between the two grooves of the second module and is thus electrically isolated, particularly against the restoring spring force caused by the deformation of the module's plastic.

[0024] In a preferred design, the modules are screwed and / or glued to the frame of the conveyor system. The advantage here is that the cable carrier, which is modularly constructed from the modules, can be attached stably and securely to the frame of the conveyor system, particularly the construction hoist.

[0025] Further advantages arise from the dependent claims. The invention is not limited to the combination of features in the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent, particularly from the problem statement and / or the problem arising from a comparison with the prior art. The invention will now be explained in more detail with reference to schematic illustrations.

[0026] Figure 1 shows a schematic side view of a conveying system according to the invention, in particular a construction hoist, with the mobile unit 20 of the conveying system not shown.

[0027] Figure 2 shows a schematic representation of a module 20 of a cable carrier 1.

[0028] Figure 3 shows the conveyor system together with secondary windings 30 of the handset 20 in a side view.

[0029] Figure 4 shows one of the secondary windings 30 in oblique view.

[0030] Figure 5 shows a schematic sketch of the electrical circuit arrangement of the conveyor system.

[0031] As shown in the figures, the conveying system, preferably designed as a construction hoist, has a cable carrier 1, in particular a vertically oriented cable carrier, in particular a cable carrier composed of modules, in which a primary conductor is inserted and received, in particular in a vertically elongated direction.

[0032] The primary conductor is designed as an elongated conductor loop. Preferably, the cable carrier 1 provides an elongated recess for inserting the primary conductor 3, particularly for inserting the primary conductor 3, which can be supplied from the power supply unit 2. The power supply unit 2 injects a medium-frequency alternating current into the primary conductor 3. The alternating current has a frequency between 10 kHz and 1 MHz, and the power supply unit 2 acts as the current source.

[0033] The cable carrier 1 is made up of modules 20 arranged in a row, each of which is positively connected. A tongue-and-groove system is provided for this purpose.

[0034] Each of these modules has, on both sides in the direction of the cable, a spring 21 designed as a tab and a groove 22 designed as a recess, into which the respective spring 21 of the next adjacent module engages. Likewise, the spring 21 of the module engages in the respective recess of the next adjacent module. The modules are preferably flat and / or plate-like, in particular each as an injection-molded plastic part.

[0035] The cable carrier can therefore be easily attached to a frame of a conveyor system, in particular a construction hoist, and then holds the primary conductor 3.

[0036] A mobile unit arranged to be movable along the frame, particularly in the vertical direction as the direction of movement, has one or more secondary windings which are inductively coupled to the primary conductor 3 laid in the cable carrier 1 in an elongated manner.

[0037] Preferably, a capacitor is connected in series or parallel to the respective secondary winding such that the resonant frequency of the resulting resonant circuit matches the frequency of the alternating current impressed into the primary conductor 3. This enables robust transmission of electrical energy, even with respect to changes in the distance between the primary conductor and the secondary winding.

[0038] The electrical voltage drop across the resonant circuit is supplied to an AC / DC converter 54, in particular a rectifier, from which an intermediate circuit can then be supplied, in particular consisting of DC lines 50.

[0039] On the one hand, a consumer 55 is supplied from the intermediate circuit, and on the other hand, an energy storage device 51 and a braking resistor 53 can be connected to the intermediate circuit via an energy management device 53.

[0040] If sufficient power is available from the secondary winding, the energy management device 53 enables the charging of the energy storage device 51, in particular the ultracapacitor, and the energy storage device 51 is charged. After the energy storage device 51 is charged, any remaining excess power is dissipated to the braking resistor 53, thus preventing a critical voltage threshold in the DC link from being exceeded.

[0041] However, if the consumer 55 requires more power than can be supplied by the secondary winding 30, the energy management device supplies power from the energy storage device 51 to the intermediate circuit, whereby the braking resistor 53 remains switched off. The energy storage device 51 is preferably designed as an ultracapacitor and is therefore capable of storing a large amount of energy.

[0042] In further embodiments of the invention, the modules are screwed to a frame of the conveyor system with a screw. Thus, the modules 20 are attached to the frame. Optionally, the modules 20 are additionally glued to the frame.

[0043] In further embodiments of the invention, the primary conductor is integrated into the cable carrier. Each module 20 has a forward conductor section inserted in a first groove 22 of the module 20, in particular overmolded with plastic, and a return conductor section inserted in a second groove 22 of the module 20, spaced apart from the first groove 22 and running parallel to it, and in particular overmolded with plastic.

[0044] At the first end of each module 20, the end closest to the direction of movement, a connecting conductor is attached to the respective module 20, which electrically connects the forward conductor section to the return conductor section. The connecting conductor is oriented transversely to the direction of movement of the handset and thus also transversely to the direction of extension of the forward conductor section and transversely to the direction of extension of the return conductor section.

[0045] Each module has only grooves 22 at its first end, which is forward in the direction of movement, and only springs 21 at its other end, which is rear in the direction of movement.

[0046] As soon as the second module 20, which is the nearest adjacent module 20, is connected by inserting its springs 21 into the grooves 22 of the first module 20, the connecting conductor of the first module 20 is pushed away from the forward and return conductor sections of the first module 20 and is thus electrically isolated. For example, the connecting conductor is received and held in the plastic of the module 20. However, when the springs 21 of the second module 20 are inserted into the grooves 22 of the first module 20, the plastic is deformed and acts as a pivot joint, so that the connecting conductor is spaced away from the forward and return conductor sections. Reference numeral list

[0047] 1 Cable carrier, in particular a cable carrier composed of modules 2 Power supply unit

[0048] 3 Primary conductors

[0049] 20 Module

[0050] 21 spring

[0051] 22 Slot 30 Secondary winding

[0052] 50 DC lines

[0053] 51 Energy storage devices, especially ultracapacitors

[0054] 52 energy management tools

[0055] 53 Braking resistor 54 AC / DC converter, in particular rectifier

[0056] 55 consumers

Claims

Patent claims:

1. Conveyor system, in particular construction hoist, wherein the conveyor system comprises a frame and a mobile unit movable along the frame, wherein the mobile unit comprises an electrical load (55), characterized in that a cable carrier (1) formed from modules (20) is attached to the frame, wherein a primary conductor (3) is received in the cable carrier (1), wherein the mobile unit has a secondary winding (30) which is inductively connected to the primary conductor (3) is coupled and from which an intermediate circuit supplying the electrical consumer (55) can be supplied, wherein the modules (20) are arranged one behind the other, in particular in the direction of movement of the mobile unit, wherein each module (20) is positively connected to the next adjacent module (20), wherein the next adjacent modules (20) are connected to each other by means of a tongue and groove system.

2. Conveyor system according to one of the preceding claims, characterized in that the actuation direction of the spring-groove system is aligned perpendicular to the direction of movement of the mobile part.

3. Conveyor system according to one of the preceding claims, characterized in that each module (20), in particular in the direction of movement of the mobile part, has on both sides a spring (21) designed as a tab and a groove (22) designed as a recess.

4. Conveyor system according to one of the preceding claims, characterized in that the respective spring (21) of a module (20) is inserted into a groove (22) designed as a recess of the module (20) nearest to this module (20), wherein the insertion direction is oriented perpendicular to the direction of movement of the mobile part.

5. Conveyor system according to one of the preceding claims, characterized in that each module (20) has two springs (21) and two grooves designed as recesses. (22) are trained.

6. Conveyor system according to one of the preceding claims, characterized in that each module (20) is designed as a plate and / or as a plastic injection molded part.

7. Conveyor system according to one of the preceding claims, characterized in that a capacitor is connected in series or parallel to the secondary winding (30) such that the resonant frequency of the resonant circuit thus formed corresponds to the frequency of the alternating current impressed into the primary conductor (3).

8. Conveyor system according to one of the preceding claims, characterized in that the resonant circuit is connected to the AC-side terminal of the AC / DC converter (54) and the intermediate circuit is connected to the DC-side terminal of the DC / AC converter (54).

9. Conveyor system according to one of the preceding claims, characterized in that an energy management means (52) makes a braking resistor (53) and / or an energy storage device (51) connectable to the intermediate circuit, in particular so that electrical power is passed from the intermediate circuit to the energy storage device (51) and / or to the braking resistor (53) or alternatively passes or forwards electrical power from the energy storage device (51) to the intermediate circuit.

10. Conveyor system according to one of the preceding claims, characterized in that the direction of movement of the mobile part is vertical.

11. Conveyor system according to one of the preceding claims, characterized in that the primary conductor (3) is aligned as an elongated current loop.

12. Conveyor system according to one of the preceding claims, characterized in that a feed-in induces a medium-frequency current into the primary conductor (3), wherein the feed-in comprises a single-phase inverter which has a gyrator, in particular a four-terminal network constructed from inductors and capacitors.

13. Conveyor system according to one of the preceding claims, characterized in that each module (20) has a forward conductor section extending in the direction of movement of the mobile unit and a return conductor section running parallel thereto, wherein a connecting conductor is attached to the first, forward end in the direction of movement of each module (20) and can be moved into different positions, which in a first position electrically connects the forward conductor section to the return conductor section and in a second position is spaced apart and / or electrically separated from the forward conductor section to the return conductor section, wherein when a second module (20) is positively connected to a first module (20), the connecting conductor of the first module (20) is moved from the first position to the second position or is pushed by the second module (20) from the first position to the second position.in particular wherein the connecting conductor is held by means of a deformable plastic section of the module (20), in particular which acts as a swivel joint for the connecting conductor.

14. Conveyor system according to one of the preceding claims, characterized in that two grooves (22) are arranged at the first end of each module (20) and two springs (21) are arranged at the second end of each module (20) or that two springs (21) are arranged at the first end of each module (20) and two grooves (22) are arranged at the second end of each module (20).

15. Conveyor system according to one of the preceding claims, characterized in that the modules (20) are screwed and / or glued to the frame of the conveyor system.

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