Feed-in system for electrical wire, in particular charging cable for electric vehicle

Abstract

The invention relates to a feed-in system (1) for an electric wire, in particular a cable (3) for charging an electric vehicle, comprising at least one cable store comprising a plurality of rollers (140) which are arranged in at least two roller trains (109, 110) such that the cable (3) can be inserted in a plurality of turns into the roller trains (109, 110), the first roller train (109) and the second roller train (110) can be moved relative to each other, at least one of the first and second roller trains (109, 110) is arranged on a linearly guided, movable roller train carrier (113), and the first and second roller trains can be moved towards each other against a return force, characterized in that the first roller train (109) and the second roller train (110) can be moved relative to each other against the return force. The roller train carrier (113) is guided on and / or in the at least one guide profile (134) in such a way that the roller train carrier (113) is designed as a guide rail or forms at least one guide rail, the roller train carrier (113) is designed as a profile complementary to the guide profile (134), and the guide profile and the profile of the roller train carrier (113) engage in one another in a form-fitting manner in such a way that the roller train carrier (13; 113) is linearly guided in the direction of movement in an inclined and torsion-proof manner.

Description

Technical Field

[0001] The present invention relates to a feed-in system with a retrieval function or a retrieval device for pipelines, in particular electric wires or cables, in particular cables for charging electric vehicles, the feed-in system comprising at least one cable storage, wherein the cable storage comprises a plurality of rollers, the rollers being arranged in at least two roller groups or roller blocks (English: "pulley blocks") so that the cables can be inserted into the roller groups in a plurality of turns, wherein a first roller group and a second roller group are adjustable or movable relative to each other, at least one of the first and second roller groups is arranged on a linearly guided, movable roller group support, and the first and second rollers can be moved toward each other against a return force. Background Art

[0002] A feed-in system of the type described above is known, for example, from EP 3 271 983 B1. This document describes an electrical connection system for charging a battery of a motor vehicle having a storage device for an electrically conductive cable, the connection system comprising at least three rollers distributed in two rows and a chain of spring elements which are connected to the lower row and exert a retaining force which increases with the length of the cable and a restoring force which decreases with the bearing of the cable, wherein helical springs arranged in a row and having different stiffnesses are provided as spring elements. This arrangement is intended to ensure that an increasing retaining force is generated with increasing extension of the cable and a decreasing restoring force is exerted when the cable is returned.

[0003] For example, another prior art is known from JP 2014230298 A, which includes a cable feed system with a cable storage, in which rollers are arranged in two roller groups, in which the cable can be unfolded under tension, wherein the two roller groups are spring-elastically supported and can be moved relative to each other against the force of the tension spring. From EP 2 813 455 A1, a further cable feed system is known, but it is mainly designed for network cables with small cross-sections. It is intended to enable simple installation or replacement of cables, but is hardly suitable for cables for charging electric vehicles.

[0004] Known feed-in systems are designed so that they are provided to the user completely equipped with the cables belonging to them. In the known systems, the necessary replacement or repair of wires or cables, for example, is not taken into account in terms of construction. Depending on the charging technology and the provision of a grid connection or grid connection point, it may be necessary to provide the feed-in system with wires designed for different voltages and / or different currents. This requires the installation of cables with different wire cross-sections. In addition, depending on the installation location, there may be other electrical safety requirements or other plugs must be provided. It is therefore basically desirable that the user can simply install the wires or cables himself.

[0005] Furthermore, compact and stable and in particular cantilevered mounting of such feed-in systems is an important aspect, primarily because not all given structural conditions permit, for example, wall mounting. Summary of the invention

[0006] A first sub-object of the invention is therefore to provide a feed-in system for electrical lines which is designed to be particularly simple and user-friendly with regard to maintenance and repair as well as with regard to assembly and in particular also with regard to ease of assembly.

[0007] In known feed-in systems and in the feed-in system according to the invention, a defined restoring force is generated when the cable is unrolled so that the cable can be pulled back again autonomously when it is laid out. This can happen: the free end of the cable accelerates as it is pulled into the cable storage with decreasing length or over the duration of the unrolling process, so that when the user lets go of the cable, the plug fastened to the end of the cable is roughly blocked by the confluence of the cable outlet. Basically, in such a simple configuration of the feed-in system, it is required that the cable be held during the unrolling process by a pulling force applied by the user, so that an unrolling process that is as gentle as possible for the cable can be performed. In the process of operating the feed-in system with the average attention of the user, it can be assumed that the user does not pay attention to holding the cable during the entire unrolling process during each operation.

[0008] Basically, it is therefore desirable to provide a feed-in system of the type mentioned in the introduction which has increased operating safety and has increased operating convenience for the user.

[0009] The invention is therefore based on the further sub-task of providing a feed-in system which ensures a safe, comfortable and user-friendly deployment process of the cable.

[0010] The first sub-object is achieved by providing a feed-in system having the features of claim 1 (first aspect of the invention).

[0011] A further, second sub-object is achieved by the features of the independent claim 11 (second aspect of the invention).

[0012] Further advantageous embodiments of the invention are respectively covered by the dependent claims, which can also be combined with one another for all aspects of the invention and can also be understood in combination as being disclosed within the scope of the invention.

[0013] First aspect (single-sided support structure)

[0014] A first aspect of the invention relates to a feed-in system with a retracting function or a retracting device for a cable, in particular for charging an electric vehicle, comprising at least one cable storage, wherein the cable storage comprises a plurality of rollers, which are arranged in at least two roller assemblies such that the cable can be inserted into the roller assemblies in a plurality of turns, wherein the first roller assembly and the second roller assembly are movable or displaceable relative to one another. At least one of the first and second roller assemblies is arranged on a linearly guided, movable roller assembly support, and the first and second roller assemblies can be moved toward one another counter to a retracting force, wherein the feed-in system according to the first aspect of the invention is characterized in particular in that the roller assembly support is guided on and / or in at least one guide profile, the at least one guide profile being designed as a guide rail, the roller assembly support being designed as a profile that is complementary and / or compatible with the guide profile, and the guide profile and the profiles of the roller assembly support are engaged in a form-fitting manner therein, so that a linear guidance of the roller assembly support in the direction of movement is achieved that is secured against tilting and twisting.

[0015] “Form-fitting” in the sense of the invention means that the ability of the profiles to interact is limited in at least one degree of freedom transversely to the direction of movement of the roller assembly.

[0016] In particular, in the case of a one-sided mounting of the roller assembly, a compact and stable and in particular cantilevered mounting of the feed system can thereby be achieved, wherein the profile of the guide rail ensures that the corresponding moments and forces can be safely absorbed.

[0017] The roller set carrier is preferably guided in at least one guide profile which is preferably arranged centrally and moreover preferably vertically in the installed position and which is designed as a guide rail or forms at least one guide rail. This embodiment of the feed-in system according to the invention has the advantage that the housing is not necessary for functionality and in particular for functionality as a supporting structural element of the feed-in system.

[0018] The guide rail can be provided with at least one foot so that the feed-in system can be freely mounted. Alternatively, a wall mounting can naturally also be provided within the framework of the invention. Ideally, the feed-in system according to the invention is designed so that the user has a choice between free mounting and wall mounting.

[0019] Finally, the guide rail can also be additionally arranged in a housing, wherein in this case the housing is not necessary for the function of the feed-in system but merely provides a protective function and, if necessary, anti-theft protection.

[0020] The guide rail can be configured, for example, in the form of a C-shaped profile or a U-shaped profile. Alternatively, the guide rail can include one or more T-shaped or I-shaped guide tabs, which can preferably be surrounded by a compatible or complementary contour of the roller set support in a form-locking manner.

[0021] The guide profile is preferably designed as a central, cantilevered guide column.

[0022] In general and within the meaning of the present invention, “cantilevering” means that a central structural element is designed when it is sufficient to fulfill its function without further external elements for load absorption.

[0023] The guide profile can be designed or constructed as a support-bearing component, in particular for the two roller assembly supports, the cables placed thereon and the return mechanism and optionally also for any further components.

[0024] Preferably, the first roller set is arranged in a fixed position. In such a case, it is advantageous if the second roller set is movable relative to the first roller set on the roller set support, for example supported so as to be relatively movable. The roller set support can be designed, for example, as a slide guided by means of rollers or sliding bearings. It is basically sufficient that only the second roller set is relatively movable, which simplifies the structure.

[0025] The housing can receive electrotechnical devices and / or components for charging the electric vehicle and for this purpose can have, for example, a partitioned and / or sealed receiving area or a partitioned and / or sealed compartment, which preferably has a suitable IP protection class.

[0026] In a preferred embodiment of the invention, it is provided that the roller set and / or the roller set support is supported or mounted or supported on one side and in a cantilevered manner.

[0027] The situation in which the roller block support is supported on one side and cantilevered is therefore particularly advantageous, since the roller block support is thus accessible from one side, so that cables can be put on from one side without having to be led through them in a laborious manner, as would be the case with a closed roller block. Due to this design, the first roller block can be fastened to a wall on one side, for example, while the second roller block can be supported on an axle fastened on one side and cantilevered to the roller block support, which is preferably designed as a slide. In this way, it is possible not only to put on cables on one side but also to replace or put on individual roller discs or rollers. Likewise, the rollers or roller discs can be ball-mounted or slide-mounted, wherein polymer bearings can also be provided for this purpose.

[0028] Cantilevered means in particular that the roller assembly is supported or held only on one side (with an unsupported opposite area), for example in the sense of a cantilever or cantilever beam. The roller assembly can thus be easily accessed from the free side, since no fastenings or the like need to be loosened.

[0029] The term "insert" (English: "to thread into" or "reeving") or "insertable" in relation to a roller block is understood to mean an arrangement in which the cable is placed on the roller block or inserted into the roller block or can be placed on the roller block or can be inserted into the roller block in a plurality of loops, similar to a pulley block or a tackle (English: "block and tackle" or simply "tackle").

[0030] In a variant, the roller block support can have a C-shaped or U-shaped cross-sectional profile which is open in the direction of extension of the axis so that the roller block or the roller disk can be easily accessed from one side in any case. The roller block support can be designed as a plastic profile having two end faces which each form a lateral leg of the roller block support and on which guide rollers, for example, can be arranged.

[0031] Preferably, the roller assembly carrier is designed as a slide which is supported via guide rollers and / or via sliding guides on guide webs or guide strips of a guide profile.

[0032] The shafts can each receive a plurality of individual rollers which are mounted so as to be rotatable independently of one another and which can, for example, consist of identically designed roller disks which are each designed as a plastic injection-molded part.

[0033] Particularly practically and advantageously, the housing has a housing part that can be removed by the user and is designed so that the user can place the connected charging cable with the connected charging plug onto the roller when the housing is open. This ensures that the feed-in system according to the invention can be retrofitted to domestic installations, for example, without the user having to intervene in the conductive parts of the charging station.

[0034] The housing can have at least one cable feed-in and at least one cable pull-out which are designed such that a cable connected at least on one side and provided with a charging plug can be placed on the roller without removing the charging plug or plugs of the cable.

[0035] In this case, it is advantageous and practical that the housing can be opened by a user through a simple hand operation. In such a configuration of the housing, it is meaningful to provide anti-theft protection and / or pull-out protection for the cable.

[0036] Preferably, the second roller assembly is fastened to the roller assembly support on one side and cantilevered, wherein preferably at least one roller assembly each has a plurality of rollers arranged in an arc-shaped distribution on a circular arc around the steering axis, and at least one of the first and second roller assemblies is arranged and held on a movable roller assembly support. In particular, when the roller assemblies are each arranged on a partial circular arc, which each extends over an angular range not much greater than 180 degrees, this has the advantage that a larger displacement stroke can be achieved for the roller assembly support.

[0037] In a particularly preferred variant of the feed-in system according to the invention, it can be provided that the guide profile has at least one hole grid and / or tooth grid extending at least in the displacement direction of the roller block carrier as part of a return stop acting against the restoring force. In this way, a return stop for cables is achieved which can absorb relatively large forces.

[0038] The retainer is preferably designed as a ratchet lock which, for example, also ensures the pulling out of the cable and its fixing or locking in a plurality of discrete positions with the lowest possible effort.

[0039] In an advantageous embodiment, the backstop is designed such that it comprises a plurality of discrete locking positions in the displacement direction of the roller set carrier and a plurality of discrete load-relieving positions arranged between the locking positions for at least one locking pawl deflectable against a spring force, the locking pawl preferably being supported on the roller set carrier so as to be deflectable against a spring force. In the sense of the invention, "discrete" refers to a finitely countable number of positions.

[0040] This embodiment has the advantage in particular that the user can specifically control or select a load-relieving position or a locking position for returning the cable by exerting a greater or lesser pulling force on the cable.

[0041] To this end, the guide profile can include at least one hole grid extending in the movement direction of the roller assembly support, wherein the hole grid includes a plurality of smaller first holes, which respectively constitute locking positions for locking claws embedded therein, wherein the hole grid includes a plurality of larger second holes, which respectively constitute load-relieving positions for locking claws sunk therein.

[0042] The backstop may include, for example, at least one locking pawl having at least one locking tooth and at least one sliding tooth, wherein the locking tooth is configured to engage with the hole grid, and the sliding tooth is arranged staggered parallel to the swing axis of the locking pawl and configured as a swing-limiting stop for the locking pawl. The locking pawl can be configured as a one-piece or integrally constructed plastic component with the sliding tooth, for example a plastic component made of a filled and / or fiber-reinforced thermoplastic plastic. The teeth of the locking pawl are preferably arranged parallel to each other with respect to the swing axis and staggered with respect to each other in the circumferential direction.

[0043] Practically, the larger holes are dimensioned so that they have a width transversely to the direction of movement of the roller assembly support that allows the locking pawl to return in an intermediate position, in which the cable can be returned and pulled out. The holes can be designed, for example, as rectangular slots or recesses in the guide profile.

[0044] The locking pawl is preferably held in the middle position with spring load. When the locking pawl is disengaged by means of the larger holes of the hole grid, the sliding tooth abuts against the face of the guide profile and thus practically limits the swiveling movement of the locking pawl.

[0045] The intermediate position of the locking pawl corresponds to a load-free position in which the locking pawl can be freely deflected in each pivoting direction, depending on the direction in which the roller set carrier is displaced.

[0046] Second aspect (backstop)

[0047] The second aspect of the invention, for which independent protection is claimed, relates to a feed-in system with a particularly advantageous backstop for cables. The feed-in system is subject to the superordinate problem or task of ensuring a compact and stable and in particular cantilevered installation of the feed-in system.

[0048] According to a second aspect, a feed-in system for electrical wires, in particular cables for charging electric vehicles, is provided, wherein the feed-in system comprises at least one cable storage, wherein the cable storage comprises a plurality of rollers, which are arranged in at least two roller groups so that the cable can be inserted into the roller groups in a plurality of turns, wherein a first roller group and a second roller group are movable relative to each other, at least one of the first and second roller groups is arranged on a linearly guided, movable roller group support, and the first and second roller groups can move toward each other against a return force, wherein the feed-in system is characterized in particular in that the roller group support is guided on and / or in at least one guide profile, the guide profile is configured as a guide rail, and at least one backstop acting against the return force is provided for at least one roller group support, the backstop acts between at least one guide profile and the roller group support and the backstop is preferably configured as a ratchet lock.

[0049] In particular, due to the fact that the backstop acts directly between the roller assembly carrier and the guide profile, a compact, space-saving backstop is achieved which can absorb large forces and moments.

[0050] The backstop can be constructed according to the backstop described above in connection with the first aspect of the invention. In this regard, the features of the two aspects of the invention are interchangeable and combinable. With regard to their advantages, reference is also made to the above embodiments.

[0051] In a particularly advantageous variant of the invention, the retainer comprises a plurality of discrete locking positions in the displacement direction of the roller set support and a plurality of discrete load-relieving positions arranged between the locking positions for at least one locking pawl, which is preferably supported on the roller set support so as to be pivotable against a spring force.

[0052] The guide profile can have at least one hole grid and / or tooth grid extending in the displacement direction of the roller set carrier as part of the backstop. Preferably, the guide profile has at least one hole grid extending in the displacement direction of the roller set carrier, wherein the hole grid comprises a plurality of smaller first holes, each forming a locking position for a locking pawl inserted therein, wherein the hole grid comprises a plurality of larger second holes, each forming a load-free position for a locking pawl inserted therein.

[0053] In a practical variant of the invention, it is provided that the guide profile, for example in the form of a U-profile or C-profile, has at least two preferably parallel hole grid tracks extending in the longitudinal direction of the guide profile, each of which forms a plurality of locking positions and load-relieving positions defined by the size of the holes, wherein preferably a load-relieving position is provided between a plurality of locking positions or possible locking engagements for the locking pawls. For each hole grid track, an associated locking pawl is provided at a corresponding position of the roller set carrier.

[0054] According to the invention, it can be provided that the backstop comprises at least one locking pawl, preferably at least two locking pawls, wherein the at least two locking pawls have at least one locking tooth and at least one sliding tooth, wherein the locking tooth is configured to cooperate with the hole grid, and the sliding tooth is arranged in a staggered manner parallel to the swing axis of the locking pawl and is configured as a swing-limiting stop for the locking pawl. At least one locking pawl is preferably elastically held in an intermediate position or preloaded into an intermediate position.

[0055] Preferred features of the first and second aspects can be advantageously combined with one another and can be considered essential to the invention for each of the aspects.

[0056] Overview

[0057] The feed-in system has the function of automatically retrieving or pulling back the guided pipeline (English: retracting) and can also be referred to as a retrieving system in this regard. Here, preferably at least 2 meters of the cable, but preferably at least 3 meters of the retractable length are provided.

[0058] The feed-in system is used essentially without a cable, but can be used particularly advantageously in combination with a cable, in particular a cable for charging electric vehicles. As cables for charging electric vehicles, for example with a purely electric drive (battery electric vehicle) or with a partially electric drive (plug-in hybrid vehicle), cables that are particularly suitable for this and conform to common standards can be considered. These cables are usually configured, for example, in Europe, with a plug according to the IEC 62196 standard or as a so-called Type 2 plug or, for example, as a so-called combined Type 2 plug or coupling for charging at a DC voltage of 200-600 V and a DC current of up to 400 A with a DC current of up to 240 kW. In addition, there are other standards for plug-in connectors and charging cables. The charging cable is designed for a corresponding typical load of at least 10 kW and preferably has a corresponding charging plug for an electric vehicle at the extendable end, in particular a charging plug according to the IEC 62196-1 standard (2016) or the IEC 62196-2 standard (2016) (e.g. Type 1 / Type 2 / Type 3).

[0059] Since charging cables are to transmit high powers of typically at least 11 kW, in most cases at least 22 kW, corresponding cable core cross sections (e.g. typical 5G 6 mm^2), cable core insulation and a shield with the necessary mechanical protection are required. This makes such charging cables with a typical total cable cross section of ≥15 mm correspondingly heavy and stiff, and thus difficult to wind manually. Here, the present invention, in all aspects of the invention, in particular for such charging cables or with such charging cables, provides a significant facilitation of manual handling for the user and also simplification or cost reduction in the production of charging posts or charging stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The present invention is explained below with reference to and according to the embodiment shown in the accompanying drawings, which embodies one of the various possible specific variations of the present invention. It shows:

[0061] Figure 1a A perspective view of a feed-in system according to the invention,

[0062] Figure 1b according to Figure 1a Front view of the feed system,

[0063] FIG. 1c is a diagram of a view according to FIG. 1b rotated 90°,

[0064] Figure 2 View of the feed system from the front without the roller assembly with the cables placed,

[0065] Figure 3a-3d Different views of the roller assembly or roller block according to the invention,

[0066] Figure 4a Front view of a feed-through system according to the invention, in which the position of the roller assembly corresponds to the cable being almost completely pulled out of the feed-through device,

[0067] Figure 4b Along the Figure 4a A cross-sectional view along line AA in FIG. 1 , in which the return stop of the feed system is in a locked position preventing the cable from returning,

[0068] Figure 4c-4d and Figure 4a and 4b The corresponding view of the view, where, according to Figure 4d The backstop in detail D is in the middle position;

[0069] Figure 4e-4f and Figure 4a and 4bThe corresponding view, where Figure 4f The backstop of detail F in is in a position in which the cable can be withdrawn;

[0070] Figure 5a exist Figure 4b An enlarged view of detail B in FIG.

[0071] Figure 5b exist Figure 4d An enlarged view of detail D,

[0072] Figure 5c exist Figure 4f An enlarged view of detail F, and

[0073] Figure 6a-6d Different views of the locking pawl are shown;

[0074] Figure 7 A front view of another embodiment of a feed-in system according to the present invention,

[0075] Figure 8 according to Figure 7 A stereoscopic view of the feed system,

[0076] Fig. 9 according to Figure 7 A three-dimensional rear view of the feed system.

[0077] Fig.10 AAccording to Figure 7 A cross section of the feed system of an embodiment, and

[0078] Fig.10 B comes from Fig.10 A three-dimensional view of the roller group bracket. DETAILED DESCRIPTION

[0079] The feed system 1 according to the invention comprises a cable storage for a cable 3 (as a charging cable for an electric vehicle). The cable storage of the feed system 1 comprises a first roller set 109 arranged in a fixed position at the top and a second roller set 110 at the bottom, which is movable relative to the first roller set 109, over which the cable 3 can be inserted in multiple turns or can be placed on them. The first roller set 109 at the top is screwed to the central support and guide profile 134 in a fixed position. The second roller set 110 is supported vertically movably relative to the first roller set 109. The second roller set 110 is arranged vertically movably or adjustably on or in the guide profile 134 by means of a roller set support 113 constructed as a slide.

[0080] The cable 3 is placed on the roller sets 109, 110 in a plurality of turns and is deflected in each case about an imaginary axis which extends transversely to the direction of movement of the second or lower roller set 110. The cable comprises a free end 17, to which a charging plug (not shown) can be connected, and a connector end 8 which is fixed in a clamping block 9 and leads from the clamping block to a voltage source.

[0081] The clamping block 9 and the pull-out guide 10 with the smooth roller assembly 16 are arranged on a holding arm 11, which is in turn fastened to the guide profile 134. The clamping block 9 comprises two plastic homogeneous parts, which form a lead-through, the diameter of which is smaller than the cable diameter, so that the cable 3 can be clamped smoothly in the lead-through. The smooth roller assembly 16 comprises three U-shaped, rotatably mounted smooth rollers 37.

[0082] The roller sets 109, 110 each include a plurality of rollers 140 that are distributed in an arc around an imaginary steering axis, wherein the roller set with a plurality of rollers 140 (here four rollers) is distributed in an arc. Here, the second roller set 110 together with all its rollers 140 that are distributed in an arc are arranged on a linearly guided, movable roller set support 113 and can be adjusted together with it.

[0083] Each of the two roller groups 109, 110 comprises roller subgroups or rollers 140 which are arranged distributed on a circular arc whose arc is slightly less than 180°. In each of the two roller groups 109, 110, at least four, here five roller subgroups are arranged distributed with equal angular size around an imaginary steering axis which is perpendicular to a guide plane which is defined by a guide profile 134 for the roller carrier 113.

[0084] Especially from Figures 3a to 3d It can be seen that each of the two roller sets 109, 110, which are designed to be essentially identical in structure, comprises a semicircular base 142 with roller axes 141 that are evenly distributed over a circular arc section. Each roller axis 141 carries four rollers 140 that are arranged coaxially with respect to one another.

[0085] All rollers 140 are preferably constructed as cable-protecting plastic rollers with a substantially semicircular cross-sectional profile for holding and guiding the cable 3. The roller axes 140 of the roller grouping are respectively held and fastened in two axially opposed, identically structured support elements 150 of a frame structure type or skeleton structure type, which define a circular arc for the roller axis 141.

[0086] As this point especially Figure 3d As can be seen in the figure, the rollers 140 arranged one after another in the direction of the arc are supported on the roller axis 141 offset relative to each other in the axial direction, so that the offset of the cable 3 at the transition from one roller group 109, 110 to the next roller group 109, 110 is minimized. Each roller group is positioned offset by a few millimeters relative to the next roller group, so that the cable does not have to overcome an offset or only a very small offset at the transition from one roller group to the next roller group 109, 110.

[0087] Each base 142 is designed so that it forms a roller cover or roller block for securely holding a single loop of the cable 3 on the roller 140. Each roller assembly 109, 110 includes a protective strip 151 that is offset radially outward relative to the roller axis 141, which is arranged at regular angular intervals from each other and is fastened to one of the two support elements 150 so that it can be folded upward or swung outward.

[0088] Figure 3a The protective web 151 is shown in the closed and inwardly pivoted state. Figure 3b The protective tab is shown in the open or folded-up state.

[0089] The roller blocks 109, 110 together with the cable 3 placed thereon and inserted in a plurality of turns form a tackle block, wherein pulling on the free end 17 of the cable (for reasons of simplicity, the plug is not shown) causes the cable 3 to be pulled out, so that the roller block support 113 is lifted in the direction of the first roller block 109, wherein the cable section between the roller blocks 109, 110 is shortened and the pull-out length of the cable 3 is increased. Naturally, the distance by which the cable 3 can be pulled out is a multiple of the distance between the roller blocks 109, 110 from one another, wherein the force to be applied is a very small fraction of the force acting on each individual section of the cable 3.

[0090] From this especially from Figure 2 The longitudinal section through the feed system 1 shown in FIG. 1 shows that the roller block support 113 is designed as a retaining plate profiled in a U-shape in cross section, to whose legs 18 the guide rollers 19a, 19b are fastened, and are supported within the guide profile 134 between the guide web 2 and the rear wall of the guide profile 134. The guide profile 134 is designed as a C-shaped profile in cross section, whose profile legs 12 overlap the roller block support 113.

[0091] exist Figure 2In the example shown in , two groups of four guide rollers 19a, 19b are provided, which are supported on the inside on the guide profile 134 in two perpendicular directions to prevent tilting. The guide rollers 19a are supported around an imaginary steering axis of the roller group 110 to prevent tilting, and the guide rollers 19b are supported around a horizontal axis perpendicular to the imaginary steering axis to prevent tilting. Instead of guiding with rollers that act on the guide profile 134 internally, an opposite arrangement is also possible, which has a guide on the outside on the corresponding profile. However, the inner guide provides better protection for the guide.

[0092] The roller block support 113 and the guide profile 134 fit into one another in a form-fitting manner, so that a rotational and tilting movement about an axis perpendicular to the displacement direction of the roller block support 113 is prevented. The cross-sectional profiles of the guide profile 134 on the one hand and the roller block support 113 on the other hand are each designed as U-shaped profiles, but these cross-sectional profiles can also be designed as C-shaped profiles that fit into one another. In addition, instead of roller guides, sliding guides can also be provided between the profiles.

[0093] The roller block support 113 can be moved in the direction of the first fixed upper roller block 109 against the spring force of the two expansion cables 21a. The expansion cables 21a are fastened on the one hand to the roller block support 113 at the rear and on the other hand to the guide profile 134. Two deflection rollers 20 for the expansion cables 21a are arranged on the guide profile 34 at its upper end and at its lower end. The expansion cables 21a act as spring elements, which generate a restoring force for the roller block support 113. These are guided in a plurality of mutually parallel sections, respectively, at the upper and lower sides via deflection rollers 20.

[0094] The movement of the roller assembly support 113 in the direction of the upper first roller assembly 109 takes place counter to the spring force of the expansion cord 21 a , which generates a restoring force that increases in proportion to the extension distance of the cable 3 .

[0095] Alternatively, the restoring force for the roller set carrier 113 can be generated by other spring elements, for example by a gas spring, a helical spring or the like.

[0096] The guide profile 134 can be designed as a central guide column, which includes, for example, a footrest 36 for free mounting on a flat base. Alternatively, the guide profile 134 can be designed with corresponding fastening means (not shown) for wall mounting.

[0097] Basically, the feed system 1 may include a housing (not shown), which, however, does not assume a load-bearing function but is merely used to cover the feed system 1 .

[0098] Furthermore, the feed-in system 1 according to the invention comprises a retainer which acts between the roller set support 113 and the guide profile 134 and by means of which the movable lower second roller set 110 can be locked in a plurality of discrete (ie countable) positions. This locking or blocking can be released by the user by pulling on the cable and moving the lower second roller set 110 into a certain predetermined position of the roller set support 113.

[0099] The following is based on Figures 5a to 5c To explain the backstop.

[0100] The roller assembly support 113 comprises two pivotably mounted locking pawls 4 which are pressed into position by means of springs. Figure 5b in the unloaded position shown in the figure or loaded. Figures 6a to 6d One of the locking pawls 4 is shown in FIG.

[0101] The locking pawls 4, which are pivotably mounted on the roller set carrier 113, each interact with a hole grid 135 of the guide profile 134. The hole grid 135 comprises two hole grid rails 136 extending in parallel at a distance from one another, which extend in the longitudinal direction of the guide profile 134 and comprise a plurality of rectangular smaller holes 137 and a plurality of rectangular larger holes 138. In the illustrated embodiment, four smaller holes 137, which are arranged directly one behind the other, are respectively provided in each hole grid rail 136 between two larger holes 138. The smaller holes 137 each define a locking position for the roller set carrier 113, while the larger holes 138 each form a load-free position for the locking pawl 4, in which the roller set carrier 113 can be freely moved in all directions at this height.

[0102] Available from Figures 5a to 5c The interaction of the locking pawl 4 with the hole grid 135 can be seen in views B, D and F in FIG. Figure 4b In FIGS. 4d and 4f , details B, D and F are shown in association with the position of the second roller assembly 110 or the roller assembly bracket 113 below, respectively.

[0103] In particular, Figures 6a to 6dThe structure of the locking pawl 4 can be seen in FIG. Each of the locking pawls 4 includes a locking tooth 6 and a sliding tooth 7, which are arranged parallel to each other in the direction of the swing axis of the locking pawl 4 and staggered in the circumferential direction. The sliding tooth 7 is slightly narrower than the locking tooth 6 in the direction of the swing axis, and the locking tooth is larger in size due to the weight of the roller group 110 below to be received by it. The locking tooth 6 cooperates with the smaller holes 137 of the hole grid 136, while the sliding tooth 7 lies flat on the surface of the guide profile 134 that is not penetrated by the holes 137, 138 in both the locking position and the release position and acts as a swing-limiting stop for the locking pawl 4. Each locking pawl 4 includes holes 13 arranged at the same angular spacing from each other on its outer periphery 3, and the holes are used to fasten the spring 5.

[0104] The larger holes 138 are wider than the smaller holes 137, that is, they have a greater extension in a direction transverse to the displacement direction of the roller set carrier 113 than the smaller holes 137. The width of the larger holes 138 is slightly greater than the total width of the locking pawl 4, so that the locking pawl 4 can be completely immersed in the larger holes 138 in the unloaded position or in the intermediate position.

[0105] The unloaded position of the locking pawl 4 is as follows: Figure 5b The spring 5 (which can be configured as a spiral spring, for example) acting on the locking pawl 4 holds the locking pawl 4 in place. Figure 5b , i.e., in the 15:00 o'clock position when viewed from the side. A deflection of the locking pawl 4 (with respect to the side view in FIG. 5 ) in the clockwise and counterclockwise direction causes the locking pawl 4 to be deflected against the restoring force of the spring 5. Starting from the unloaded position shown in FIG. 5 , in which the relevant locking pawl 4 is completely immersed in the larger hole 138, the roller assembly support 113 with the lower roller assembly 110 can be moved upward in the direction of the upper roller assembly 109 or downward away from the upper roller assembly 108. If the roller assembly support 113 of the lower roller assembly 110 is moved upward due to the tension on the cable 3, the locking pawl 4 is deflected counterclockwise to the position shown in FIG. Figure 5a (Detail B). The locking tooth 6 and the smaller sliding tooth 7 are out of engagement with the large hole 138 and the locking pawl 4 slips on the hole grid 136 when the roller set carrier 113 moves upward, wherein the sliding tooth 7 lies flat on the uninterrupted surface of the guide profile 134 and acts as a pivot limit stop for the locking pawl 4. If the roller set carrier 113 moves in the opposite direction to the lower roller set 110, i.e. away from the upper roller set 109, the locking tooth 6 engages in the smaller hole 137, so that the downward movement of the roller set carrier is blocked.

[0106] From Figure 5b Starting from the unloaded position or intermediate position of the locking pawl 4 shown in (detail D), the tension relief of the cable 3 causes the locking pawl 4 to deflect in the counterclockwise direction, wherein the locking pawl is disengaged from the larger hole 138. This swiveling movement also takes place against the spring force of the spring 5. In this case, the roller set support 113 with the roller set 110 below can be moved to the position in which the locking pawl 4 is in the counterclockwise direction. Figure 1a , in which the sliding tooth 7 lies on the uninterrupted, smooth surface of the guide profile 134 and the locking tooth 6 remains out of engagement with the hole grid 136 .

[0107] Now, refer to Figures 7 to 10 A-10B, the Figures 7 to 10 A-10B shows a second embodiment according to the invention. One major difference is the simpler construction type of the roller assembly, which, however, requires a greater construction height than the first example.

[0108] The feed system 201 comprises a cable storage for a cable 3 (as a charging cable for an electric vehicle). The cable storage of the feed system 201 comprises an upper, fixedly arranged first roller set 209 and a lower, movable second roller set 210 relative thereto. The first roller set 209 is supported on a first shaft 211 which is cantilevered and fastened to a guide profile 234 of a base 235, while the second roller set 210 is supported on a second shaft 212 which is cantilevered and fastened to a roller set support 213 which can be guided and moved on the guide profile 234. As shown in FIG. Fig.10 As can be seen from A-10B, the guide profile 234 is constructed as a profile rail that is C-shaped in cross section and is supported against and fastened to the base by means of a footrest 236. The movable roller set 210 is fastened to a roller set support 213, which can be arranged displaceably inside the guide profile 234 so that the roller sets 209, 210 can move toward and away from each other.

[0109] The roller groups 209, 210 each include four individually independently rotatable rollers 214, which in turn are composed of individual roller disks. The rollers 214 are each supported on ball bearings 216, which are seated on shafts 211, 212.

[0110] The roller blocks 209, 210, together with the cable 3 placed on them and inserted in a plurality of turns, form a tackle block, wherein a pulling force on the free end 217 of the cable 3 (the plug is not shown for reasons of simplicity) leads to the pulling out of the cable 3, so that the roller block support 213 is lifted in the direction of the first roller block 209, wherein the cable section between the roller blocks 209, 210 is shortened and the elongated length of the cable 3 is increased. Naturally, the distance by which the cable 3 can be pulled out is a multiple of the distance between the roller blocks 209, 210 from one another, wherein the force to be applied is a very small fraction of the force acting on each individual section of the cable 3.

[0111] The roller assembly support 213 is designed as a retaining plate with a U-shaped topographic profile in cross section, to whose legs 218 guide rollers 219a, 219b are fastened, said guide rollers being guided within the guide profile 234 between the guide tabs and the rear wall of the guide profile 234. Figure 7-10 In the example, Fig.10 As shown in FIG. 2 , two groups of four guide rollers 219a, 219b are provided, which are supported on the inside on the guide profile 234 in two perpendicular directions to prevent tilting. The guide rollers 219a are supported around the axis of rotation of the roller group 210 to prevent tilting, and the guide rollers 219b are supported around a horizontal axis perpendicular to the axis of rotation to prevent tilting. Instead of guiding with rollers that act on the guide profile 234 internally, an opposite arrangement is also possible, which has guides on the outside on the corresponding profile. However, the guides on the inside provide better protection for the guidance.

[0112] The roller block support 213 can be moved in the direction of the first fixed upper roller block 209 against the spring force of two expansion cables 221a. The expansion cables 221a are fastened on the one hand to the roller block support 213 at the rear side and on the other hand to the guide profile 234. Two deflection rollers 220 for the expansion cables 221a are arranged on the guide profile 234 at its upper end and at its lower end. The spring element, as the expansion cables 221a, which are used as the spring element to generate the restoring force for the roller block support 213, are guided in a plurality of mutually parallel sections via deflection rollers at the upper and lower sides, respectively.

[0113] The movement of the roller assembly support 213 in the direction of the upper first roller assembly 209 is carried out against the spring force of the expansion cord 221a, which generates a restoring force that increases in proportion to the distance the cable is pulled out. Since the expansion cord 221a is guided through the upper and lower rollers 220, respectively, it is possible to provide a relatively long spring element with a relatively low spring constant in a space-saving manner. The resulting spring characteristic curve is relatively flat and gives the user the feeling that he can pull the cable 3 out of the cable storage with an almost constant force.

[0114] Due to the guide profiles 134 or 234, housings of any design, not shown, can be used with the feed-in system proposed here, which preferably consists of a plurality of housing parts. Naturally, the invention is understood to mean that the type of cable 3 used for the feed-in system is not important. Furthermore, other designs with mutually complementary guide profiles and roller assembly supports also fall within the scope of the invention.

[0115] Reference numerals list

[0116] Figure 1-6

[0117] 1 Feeding system

[0118] 2 Guide tabs

[0119] 3 Cables

[0120] 4 Locking claws

[0121] 5 Spring

[0122] 6 Locking tooth

[0123] 7 Sliding teeth

[0124] 8 Connector end

[0125] 9 Clamping block

[0126] 10 Exit guide

[0127] 11 Holding arm

[0128] 12 Profile legs

[0129] 13 Eyelets

[0130] 16 Smooth roller assembly

[0131] 17 Free end of cable

[0132] 18 Legs of roller bracket

[0133] 19a First guide roller

[0134] 19b Second guide roller

[0135] 20 Steering roller

[0136] 21a Expansion rope

[0137] 36 Pedals

[0138] 37 Smooth roller

[0139] 109 First roller group

[0140] 110 Second roller set

[0141] 113 Roller bracket

[0142] 134 Guide profile

[0143] 135 hole grid

[0144] 136 hole grid track

[0145] 137 Smaller hole

[0146] 138 Larger hole

[0147] 140 Roller

[0148] 141 Roller axis

[0149] 142 Semicircular base

[0150] 150 Bracket elements

[0151] 151 Protective tab (foldable upwards)

[0152] Figure 7-10

[0153] 3 Cables

[0154] 201 Feeding system

[0155] 204 End profile

[0156] 205 Side parts

[0157] 209 First roller group

[0158] 210 Second roller set

[0159] 211 First Axis

[0160] 212 Second Axis

[0161] 213 Roller bracket

[0162] 214 Roller

[0163] 215 Roulette

[0164] 216 Ball Bearings

[0165] 217 Free end of cable

[0166] 218 Roller bracket legs

[0167] 219a First guide roller

[0168] 219b Second guide roller

[0169] 220 Steering roller

[0170] 221a Expansion rope

[0171] 221b (tensile) rope

[0172] 222 First fastening point

[0173] 223 Second fastening point

[0174] 234 Guide profiles

[0175] 235 Base

[0176] 236 Pedals

Claims

1. A feed-in system (1) for electrical lines, in particular cables (3) for charging electric vehicles, comprising at least one cable storage, wherein: The cable storage comprises a plurality of rollers (140), which are arranged in at least two roller groups (109, 110) so that the cable (3) can be inserted into the roller groups (109, 110) in a plurality of turns, wherein the first roller group (109) and the second roller group (1110) are movable relative to each other, at least one of the first and second roller groups (109, 110) is arranged on a linearly guided, movable roller group support (113), and the first and second roller groups (109, 110) are movable towards each other against a return force, The invention is characterized in that the roller assembly support (113) is guided on and / or in at least one guide profile (134), the guide profile is constructed as a guide rail or constitutes at least one guide rail, the roller assembly support (13) is constructed as a profile complementary to the guide profile (134), and the guide profile (134) and the roller assembly support (113) are fitted into each other in a shape-locking manner, so that the roller assembly support (113) is linearly guided in a direction of movement in a manner that prevents tilting and torsion.

2. The feed-in system (1) according to claim 1, characterized in that The guide profile (134) is designed as a central, cantilevered guide column.

3. The feed-in system (1) according to any one of claims 1 or 2, characterized in that The first roller set (109) is arranged in a fixed position, and the second roller set (110) is movable on the roller set support (113) relative to the first roller set (109).

4. The feed-in system (1) according to any one of claims 1 to 3, characterized in that The roller assembly support (113) is designed as a slide which is supported via guide rollers (19a, 19b) and / or via sliding guides on guide webs (2, 18) or profile strips of the guide profile (134).

5. The feed-in system (1) according to any one of claims 1 to 4, characterized in that The second roller group (110) is fastened on one side and cantilevered on the roller group bracket (113), wherein preferably, at least one roller group (109, 110) respectively has a plurality of rollers (140) arranged in an arc shape distributed on an arc around a steering axis, and at least one of the first and second roller groups (109, 110) is arranged and retained on the movable roller group bracket (113).

6. The feed-in system (1) according to any one of claims 1 to 5, characterized in that The guide profile (134) has at least one perforated grid (135) and / or toothed grid extending at least in the displacement direction of the roller set carrier (113) as a return stop acting against the restoring force.

7. The feed-in system (1) according to claim 6, characterized in that The backstop is designed as a ratchet lock.

8. The feed-in system (1) according to claim 6 or 7, characterized in that The backstop comprises a plurality of discrete locking positions and a plurality of discrete load-relieving positions arranged between the locking positions in the moving direction of the roller assembly support (113), for at least one locking pawl (4) that can be deflected against a spring force, and the locking pawl is preferably supported on the roller assembly support (113) so as to be deflected against a spring force.

9. The feed-in system (1) according to any one of claims 1 to 8, characterized in that The guide profile (134) comprises at least one hole grid (135) extending in the moving direction of the roller assembly support (113), the hole grid respectively comprising a plurality of smaller first holes (137), the first holes respectively constituting a locking position, the locking position being used to engage with the locking claw (4) in the locking position, and the hole grid (135) comprising a plurality of larger second holes (138), the second holes respectively constituting a load-releasing position, the load-releasing position being used to sink the locking claw (4) in the load-releasing position.

10. The feed-in system (1) according to any one of claims 6 to 9, characterized in that The backstop comprises at least one locking pawl (4), which has at least one locking tooth (6) and at least one sliding tooth (7), wherein the locking tooth (6) is configured to engage in a blocking manner in the hole grid (135), and the sliding tooth (7) is arranged offset parallel to the swing axis of the locking pawl (4) and is configured as a swing-limiting stop for the locking pawl (4).

11. A feed-in system (1) for an electrical line, in particular a cable (3) for charging an electric vehicle, wherein: The feed-in system comprises at least one cable storage device, wherein the cable storage device comprises a plurality of rollers (140), which are arranged in at least two roller groups (109, 110) so that the cable (3) can be inserted into the roller groups (109, 110) in a plurality of turns, wherein the first roller group (109) and the second roller group (110) are movable relative to each other, at least one of the first and second roller groups is arranged on a linearly guided, movable roller group support (113), and the first and second roller groups are movable towards each other against a return force, It is characterized in that the roller set support (113) is guided on and / or in a guide profile, the guide profile is constructed as a guide rail, and at least one return stop acting against the return force is provided for at least one roller set support, the return stop acts between the guide profile and the roller set support and the return stop is preferably constructed as a ratchet lock.

12. The feed-in system (1) according to claim 11, characterized in that The backstop comprises a plurality of discrete locking positions and a plurality of discrete load-relieving positions arranged between the locking positions in the moving direction of the roller assembly support (113), for at least one locking pawl, which is preferably supported on the roller assembly support (113) in a deflectable manner against a spring force.

13. The feed-in system (1) according to claim 11 or 12, characterized in that The guide profile (134) has at least one perforated grid (135) and / or toothed grid as part of the backstop, which grid extends and continues in the displacement direction of the roller set carrier (134).

14. The feed-in system (1) according to any one of claims 11 to 13, characterized in that The guide profile (134) comprises at least one hole grid (135) extending and continuing in the direction of movement of the roller assembly support, the hole grid (135) comprising a plurality of smaller first holes (137), each of which constitutes a locking position for a locking claw (4) embedded in the locking position, and the hole grid (135) comprises a plurality of larger second holes (138), each of which constitutes a load-relieving position for a locking claw (4) sunk into the load-relieving position.

15. The feed-in system (1) according to any one of claims 11 to 14, characterized in that The retainer comprises at least one locking pawl (4), which has at least one locking tooth (6) and at least one sliding tooth (7), wherein the locking tooth (5) is configured to engage in a blocking manner in the hole grid (135), and the sliding tooth (7) is arranged offset parallel to the pivot axis of the locking pawl (4) and is configured as a pivot-limiting stop for the locking pawl (4).

16. Feed-in system (1) according to any one of claims 11 to 15, characterised in that One or more of the characterizing features of any one of claims 1 to 10 , in particular any one of claims 1 to 5 .

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