Supply system for an electrical line, in particular for a charging cable for an electric vehicle

Abstract

The invention relates to a supply system (1) for an electrical line, in particular for a cable (3) for charging electric vehicles, comprising at least one cable store, wherein the cable store has a plurality of pulleys (140) which are arranged in at least two pulley blocks (109, 110) in such a manner that a cable (3) can be threaded into the pulley blocks (109, 110) in several windings, wherein a first pulley block (109) and a second pulley block (110) can be displaced relative to one another, at least one of the first and second pulley blocks (109, 110) is arranged on a linearly guided, displaceable pulley block carrier (113), and the first and the second pulley blocks can be moved on top of one another against a restoring force, wherein the supply system (1) is in particular characterised in that the pulley block carrier (113) is guided on and / or in at least one guide profile (134) which is designed as a guide rail or forms at least one guide rail, the pulley block carrier (113) is designed as a profile that is complementary to the guide profile (134), and the guide profile and the profile of the pulley block carrier (113) engage in one another in a form-fitting manner such that an anti-tilt and anti-turn linear guiding of the pulley block carrier (13; 113) is effected in the direction of displacement.

Description

[0001] Feed system for an electrical cable, in particular for a charging cable for an electric vehicle

[0002] The invention relates to a feed system with a retrieval function or retrieval device for a line, in particular electrical lines or cables, in particular for cables for charging electric vehicles, comprising at least one cable storage device, wherein the cable storage device comprises a plurality of rollers which are arranged in at least two roller packages or roller blocks (English, "pulley blocks") in such a way that a cable can be retracted into the roller packages in several turns, wherein a first roller package and a second roller package are adjustable or displaceable relative to one another, at least one of the first and second roller packages is arranged on a linearly guided, displaceable roller package carrier, and the first and second roller packages are movable towards one another against a restoring force.

[0003] A feed 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 motor vehicle battery, having a storage device for an electrical cable, comprising at least three rollers arranged in two rows, and a chain of spring elements connected to the lower row, which exert a holding force that increases with the length of the cable and a restoring force that decreases with the storage of the cable, wherein spiral springs of different stiffness arranged in a row are provided as spring elements. This arrangement is intended to ensure that an increasing holding force is generated as the cable is unwound, and a decreasing restoring force is exerted as the cable is returned.

[0004] Further prior art is known, for example, from JP 2014230298 A, which comprises a cable feed system with a cable storage device in which rollers are arranged in two roller packages, from which the cable can be unwound under tension, with both roller packages being spring-mounted and each being displaceable against the force of a tension spring. Another cable feed system is known from EP 2 813 455 A1, but this is primarily designed for network cables with a small cross-section. It is intended to allow easy installation and replacement of the cable, but is hardly suitable for cables for charging electric vehicles.

[0005] The known supply systems are designed in such a way that they are provided to the user fully assembled with the corresponding cable. Any necessary replacement or repair of the electrical lines or cables is not taken into account in the design of the known systems. Depending on the charging technology and the provision of mains connections or mains connection points, it may be necessary to equip the supply system with electrical lines designed for different voltages and / or different currents. This requires the installation of cables with different cross-sections. Furthermore, depending on the installation location, different electrical safety requirements apply or different plugs must be provided. It is therefore generally desirable for the user to be able to easily install electrical lines or cables themselves.

[0006] Furthermore, a compact and stable, and in particular self-supporting, installation of such a supply system is an essential aspect, especially since structural conditions do not always permit wall mounting, for example. A first sub-object of the present invention therefore concerns the provision of a supply system for electrical cables that is particularly simple and user-friendly with regard to maintenance and repair, as well as with regard to assembly, and in particular with regard to installation.

[0007] In the known feeding systems, as well as in the feeding system according to the invention, a certain restoring force is generated when the cable is unwound so that the cable can be automatically retracted when stowed away. In this case, it can happen that the free end of the cable is accelerated as its length decreases when it is pulled into the cable storage unit or over the duration of the winding-up process, so that a plug attached to the end of the cable is abruptly stopped by the mouth of a cable outlet when the user releases the cable. In principle, with such a simple configuration of the feeding system, it would be necessary for the user to hold the cable in place while pulling on it during the winding-up process in order to be able to carry out a winding-up process that is as gentle as possible on the cable.When operating the feed system with average user attention, it can be assumed that the user will not pay attention to holding the cable during the entire winding process during every operating procedure.

[0008] In principle, it would therefore be desirable to provide a feeding system of the type mentioned above with increased operating safety and increased operating comfort for the user.

[0009] The invention is therefore based on the further sub-object of providing a feeding system which ensures a safe, convenient and user-friendly winding process of the cable.

[0010] The first sub-object is achieved by providing a feeding system having the features of claim 1 (first aspect of the invention). The further, second sub-object is achieved by the features of the independent claim 11 (second aspect of the invention).

[0011] Further advantageous embodiments of the invention are each covered by the subclaims, which can in principle be combined with one another for all aspects of the invention and are to be understood in combination as being disclosed within the scope of the invention.

[0012] FIRST ASPECT (one-sided storage)

[0013] A first aspect of the invention relates to a feed system with a retracting function or retracting device for cables, in particular for cables for charging electric vehicles, comprising at least one cable storage device, the cable storage device comprising a plurality of rollers which are arranged in at least two roller packages in such a way that a cable can be retracted into the roller packages in several turns, a first roller package and a second roller package being movable or retractable relative to one another.are displaceable, at least one of the first and second roller packages is arranged on a linearly guided, displaceable roller package carrier, and the first and the second roller package are movable towards one another against a restoring force, wherein the feed system according to the first aspect of the invention is characterized, among other things, in that the roller package carrier is guided on and / or in at least one guide profile which is designed as a guide rail, that the roller package carrier is designed as a profile which is complementary to and / or compatible with the guide profile and that the guide profile and the profile of the roller package carrier engage in such a form-fitting manner that a tilt- and twist-proof linear guidance of the roller package carrier in the direction of displacement is brought about.

[0014] "Form-fitting" in the sense of the invention means that at least one degree of freedom transverse to the direction of displacement of a roller assembly is restricted by the interaction of the profiles. In particular, this allows for a compact and stable, and in particular self-supporting, installation of the feed system with one-sided mounting of the roller assemblies, whereby the profile of the guide rail ensures that corresponding moments and forces can be safely absorbed.

[0015] The roll package carrier is preferably guided in at least one guide profile, preferably arranged centrally and furthermore preferably vertically in the installed position, which is designed as a guide rail or at least forms a guide rail. This embodiment of the feed system according to the invention has the advantage that a housing is not required for the functionality and, in particular, as a supporting structural element of the feed system.

[0016] The guide rail can be provided with at least one base, allowing the feed system to be freely positioned. Alternatively, wall mounting is also provided within the scope of the invention. Ideally, the feed system according to the invention is designed so that the user has the choice between free-standing installation and wall mounting.

[0017] Finally, the guide rail can also be arranged within a housing, in which case the housing is not required for the functionality of the feeding system, but only provides a protective function and, if necessary, an anti-theft device.

[0018] The guide rail can be designed, for example, in the form of a C-profile or a U-profile. Alternatively, the guide rail can comprise one or more T-shaped or I-shaped guide webs, which can be encompassed, preferably in a form-fitting manner, by a compatible or complementary contour of the roller assembly carrier.

[0019] Preferably, the guide profile is designed as a central, self-supporting guide column. "Self-supporting" generally refers, and in the context of the invention, to the design of a central structural element that fulfills its function without the need for additional external elements for load bearing.

[0020] The guide profile can be designed or constructed as a load-bearing component, in particular for both roller package supports, the cable placed on it and the return mechanism, and optionally also for any other components.

[0021] Preferably, the first roller assembly is arranged in a stationary manner. In such a case, it is advantageous if the second roller assembly is displaceable on the roller assembly carrier relative to the first roller assembly, e.g., if it is mounted so that it can move relative to the first roller assembly. The roller assembly carrier can, for example, be designed as a carriage guided by rollers or plain bearings. It is generally sufficient if only the second roller assembly is movable relative to the first roller assembly, which simplifies the design.

[0022] The housing can accommodate electrical equipment and / or components for charging electric vehicles and for this purpose can have, for example, a separate and / or sealed receiving area or a separate and / or sealed compartment, preferably with a suitable IP protection class.

[0023] In a preferred embodiment of the invention, it is provided that the roller packages and / or the roller package supports are mounted or attached or supported on one side and in a cantilever manner.

[0024] The fact that the roller package supports are mounted on one side in a cantilever manner is particularly advantageous because the roller packages are thus accessible from one side in such a way that a cable can be laid on from one side without the cable having to be laboriously threaded through, as would otherwise be the case with closed roller blocks. Thanks to this construction, for example, the first roller package can be fastened to a wall on one side, whereas the second roller package can be mounted on an axle fastened on one side in a cantilever manner on a roller package support that is preferably designed as a carriage. In this way, it is possible to lay the cable on one side and to replace or install individual roller disks or rollers. The rollers or roller disks can also be mounted on ball bearings or plain bearings, and polymer bearings can also be provided for this purpose.

[0025] Cantilevered mounting in this case means, in particular, that the roller assemblies are supported or held on one side only, with an unsupported opposite area, such as a cantilever arm or cantilever beam. This allows for easy access to the roller assemblies from the free side, as no fastening or similar devices need to be removed.

[0026] The term "to thread into" or "reeving" or "reevingable" in relation to the pulley packages refers to an arrangement in which the cable is placed or inserted onto or into the pulley packages in several turns, similar to a pulley or cable pulley (English: "block and tackle" or just "tackle").

[0027] In one variant, the roller assembly support can have a C- or U-shaped cross-sectional profile that is open in the direction of the axis, so that the roller assembly or roller discs are easily accessible from one side. The roller assembly support can be designed as a plastic profile that has two end faces, each forming a lateral leg of the roller assembly support, on which, for example, guide rollers can be arranged.

[0028] Preferably, the roller package carrier is designed as a carriage which is supported by guide rollers and / or sliding guides on guide webs or profile belts of the guide profile.

[0029] The axles can each accommodate a plurality of individual, independently rotatable rollers, which can, for example, consist of identically designed roller discs, each of which is designed as a plastic injection-molded part.

[0030] It is particularly expedient and advantageous if the housing has user-removable housing parts designed so that the user can place the connected charging cable with the connected charging plug onto the rollers when the housing is opened. This ensures that the supply system according to the invention can be retrofitted, for example, to domestic installations without the user having to intervene in the live parts of the charging station.

[0031] The housing can have at least one cable inlet and at least one cable outlet, which are designed such that a cable connected at least on one side and provided with a charging plug can be placed on the rollers by the user without dismantling the charging plug(s) of the cable.

[0032] In this context, it is advantageous and practical if the housing can be opened easily by the user. With this type of housing configuration, an anti-theft device and / or a cable pull-out protection device are advisable.

[0033] The second roller package is preferably fastened to the roller package carrier on one side and in a cantilever manner, wherein preferably at least one roller package each has a plurality of rollers arranged in an arc around a deflection axis and at least one of the first and second roller packages is arranged and held on the displaceable roller package carrier. In particular, if the roller packages are each arranged on a partial arc which each extends over an angular circumference of not significantly more than 180 degrees, this has the advantage that a greater displacement path can be achieved for the roller package carriers. In a particularly preferred variant of the feed system according to the invention, it can be provided that the guide profile has at least one hole pattern and / or tooth pattern which continues at least in the displacement direction of the roller package carrier as part of a return stop which acts against the restoring force.In this way, a return stop for the cable is realized which can absorb relatively high forces.

[0034] The non-return device is preferably designed as a ratchet mechanism, which also ensures, for example, that the cable can be pulled out and locked or secured in a variety of discrete positions with the least possible effort.

[0035] In an advantageous embodiment, the backstop is designed such that it comprises, in the direction of displacement of the roller assembly carrier, a plurality of discrete locking positions and a plurality of discrete release positions provided between the locking positions for at least one locking pawl deflectable against a spring force, which pawl is preferably mounted on the roller assembly carrier so that it can be deflected against a spring force. Discrete in the sense of the invention means a finite, countable number of positions.

[0036] This embodiment has the particular advantage that the user can specifically control or select a relief position or a blocking position for the cable return by applying more or less tension to the cable.

[0037] For this purpose, the guide profile can comprise at least one hole pattern extending in the direction of displacement of the roll pack carrier, wherein the hole pattern comprises a plurality of first smaller holes, each of which forms a blocking position for a pawl engaging therein, and wherein the hole pattern comprises a plurality of second larger holes, each of which forms a relief position for a pawl engaging therein.

[0038] The backstop can, for example, comprise at least one pawl which has at least one locking tooth and at least one sliding tooth, wherein the locking tooth is designed to engage with the hole pattern and the sliding tooth is arranged offset parallel to a pivot axis of the pawl and is designed as a pivot limiting stop for the pawl. The pawl can be designed with the sliding tooth as a one-piece or integrally formed plastic component, for example from a filled and / or fiber-reinforced thermoplastic. The teeth of the pawl are preferably arranged parallel to one another with respect to a pivot axis and offset from one another with respect to a circumferential direction.

[0039] The size of the larger holes is preferably dimensioned such that they have a width transverse to the direction of travel of the roller assembly support that allows the locking pawl to return to a neutral position, in which both a return movement and a cable extension movement are possible. The holes can be designed, for example, as rectangular openings or recesses in the guide profile.

[0040] The pawl is preferably held in the neutral position by spring loading. If the pawl is displaced to the point where it disengages from the larger holes in the hole pattern, the sliding tooth rests against a surface of the guide profile, thus effectively limiting the pivoting movement of the pawl.

[0041] The neutral position of the pawl corresponds to a relief position in which the pawl can be freely deflected in any pivoting direction, depending on the direction in which the roller package carrier is displaced.

[0042] Second aspect (backstop)

[0043] A second aspect of the invention, for which independent protection is claimed, concerns a feed system with a particularly advantageous cable anti-return device. This aspect is subordinate to the overarching problem or task of ensuring a compact and stable, and in particular self-supporting, installation of a feed system.

[0044] According to the second aspect, a feed system for an electrical cable, in particular for a cable for charging electric vehicles, is provided, wherein the feed system comprises at least one cable storage device, wherein the cable storage device comprises a plurality of rollers arranged in at least two roller packages such that a cable can be wound into the roller packages in several turns, wherein a first roller package and a second roller package are displaceable relative to one another, at least one of the first and second roller packages is arranged on a linearly guided, displaceable roller package carrier, and the first and second roller packages are movable towards one another against a restoring force, wherein the feed system is characterized in particular in that the roller package carrier is guided on and / or in at least one guide profile,which is designed as a guide rail and at least one return stop acting against the restoring force is provided for at least one roller package carrier, which acts between the at least one guide profile and the roller package carrier and which is preferably designed as a ratchet lock.,

[0045] In particular, the fact that the backstop acts directly between the roller package carrier and the guide profile results in a compact, space-saving backstop that can absorb high forces and moments.

[0046] The backstop can be designed corresponding to the backstop described above in connection with the first aspect of the invention. The features of both aspects of the invention are interchangeable and combinable in this respect. With regard to their advantages, reference is also made to the above explanations. In a particularly advantageous variant of the invention, the backstop comprises a plurality of discrete locking positions in the direction of displacement of the roller assembly carrier and a plurality of discrete relief positions provided between the locking positions for at least one locking pawl, which is preferably mounted on the roller assembly carrier so as to be deflectable against a spring force.

[0047] The guide profile can have at least one hole pattern and / or tooth pattern as part of the non-return device, extending in the direction of displacement of the roller pack carrier. Preferably, the guide profile has at least one hole pattern extending in the direction of displacement of the roller pack carrier, wherein the hole pattern comprises a plurality of first smaller holes, each forming a locking position for a pawl engaging therein, and wherein the hole pattern comprises a plurality of second larger holes, each forming a release position for a pawl engaging therein.

[0048] In an expedient variant of the invention, the guide profile, which is designed, for example, as a U-profile or C-profile, has at least two preferably parallel hole pattern tracks extending in the longitudinal direction of the guide profile, each of which forms a plurality of locking positions and release positions defined by the size of the holes. Preferably, a release position is provided between a plurality of locking positions or possible locking engagements for a locking pawl. A corresponding locking pawl is provided for each hole pattern track at a corresponding location on the roller assembly carrier.

[0049] According to the invention, it can be provided that the return stop has at least one pawl, preferably at least two

[0050] The locking pawls comprise at least one locking tooth and at least one sliding tooth, wherein the locking tooth is designed to engage with the hole pattern, and the sliding tooth is arranged offset parallel to a pivot axis of the locking pawl and is designed as a pivot limit stop for the locking pawl. The at least one locking pawl is preferably resiliently held in a neutral position or preloaded into a neutral position.

[0051] The preferred features of the first and second aspects can be advantageously combined with one another and can be considered relevant to the invention for each of the aspects.

[0052] GENERAL

[0053] The feed system has the function of automatically retracting or retracting the guided cable and can therefore also be referred to as a retraction system. It preferably provides an extendable cable length of at least 2 meters, but preferably at least 3 meters.

[0054] The supply system is generally used without a cable, but is particularly advantageous in combination with a cable, in particular a cable for charging electric vehicles. As a cable for charging electric vehicles, e.g. with purely electric drive (battery electric vehicles) or with partially electric drive (plug-in hybrid vehicles), suitable cables according to the usual standard are particularly suitable. In Europe, for example, these cables are often designed with a plug that complies with the IEC 62196 standard or as a so-called Type 2 plug or, for example, as a so-called Combo 2 plug or coupling for DC charging with up to 240 kW at 200-600 V DC and up to 400 A DC. There are also other standards for connectors and charging cables.The charging cable is designed for a corresponding typical load of at least 10kW and preferably has a corresponding charging plug for an electric vehicle at the extendable end, in particular a charging plug according to standard IEC 62196-1 (2016) or standard IEC 62196-2 (2016) (e.g. Type 1 / Type 2 / Type 3).

[0055] Since the charging cable has to transmit a high electrical output of typically at least 11 kW, usually at least 22 kW, appropriate wire cross-sections (e.g. typically 5 G 6mnM2), wire insulation and a sheath with the necessary mechanical protection are required. This makes such a charging cable, with a typical total cable cross-section of 15 mm, correspondingly heavy and stiff, so that winding it up by hand is laborious. The invention, in all its aspects, offers considerable ease of handling for the user, as well as simplification and / or

[0056] Reducing costs in the production of a charging column or charging station.

[0057] The invention is explained below with reference to and with reference to an embodiment shown in the accompanying drawings, which embodies one of several possible concrete variants of the invention. They show:

[0058] Figure la a perspective view of the

[0059] Feeding system according to the invention,

[0060] Figure lb is a front view of the feeding system according to

[0061] Figure la ,

[0062] Figure lc is a view rotated by 90 ° of the representation according to Figure lb ,

[0063] Figure 2 shows a representation of the feeding system without the

[0064] Reel packages with the cables laid out from the front,

[0065] Figures 3a-3d show different representations of a

[0066] Roller package or roller block according to the invention,

[0067] Figure 4a is a front view of the feeding system according to the invention, in which the position of the roller packages corresponds to an almost complete withdrawal of the cable from the feeding device, Figure 4b is a sectional view along the lines AA in Figure 4a, in which the return stop of the feeding system is in a blocked position preventing the return of the cable,

[0068] Figures 4c 4d Views corresponding to those of Figures 4a and

[0069] 4b, with the backstop in a neutral position according to detail D in Figure 4d,

[0070] Figures 4e 4f corresponding to Figures 4a and 4b

[0071] Views, with the backstop according to detail F in Figure 4f in a position in which a return of the cable is permitted,

[0072] Figure 5a is an enlarged view of detail B in Figure 4b,

[0073] Figure 5b is an enlarged view of detail D in Figure 4d,

[0074] Figure 5c is an enlarged view of detail F in Figure 4f and

[0075] Figures 6a 6d different views of a pawl;

[0076] Figure 7 is a front view of another embodiment of the feeding system according to the invention,

[0077] Figure 8 is a perspective view of the feeding system according to FIG.7,

[0078] Figure 9 is a perspective rear view of the feeding system according to FIG.7,

[0079] Figure 10A shows a cross section through the feeding system according to the embodiment of FIG.7, and Figure 10B shows a perspective view of the roll package-

[0080] Carrier from FIG.10A.

[0081] The feed system 1 according to the invention comprises a cable storage unit for a cable 3 as a charging cable for an electric vehicle. The cable storage unit of the feed system 1 comprises a first, upper, stationary roller assembly 109 and a second, lower roller assembly 110, which is displaceable relative thereto and over which the cable 3 can be wound in several turns or placed onto them. The first, upper roller assembly 109 is screwed in a stationary manner to a central support and guide profile 134. The second roller assembly 110 is mounted so as to be vertically displaceable relative to the first roller assembly 109. The second roller assembly 110 is arranged so as to be vertically displaceable or adjustable on or in the guide profile 134 by means of a roller assembly carrier 113 designed as a slide.

[0082] The cable 3 is wound onto the roller assemblies 109, 110 with a plurality of windings and is deflected around an imaginary axis extending transversely to the direction of displacement of the second or lower roller assembly 110. The cable comprises a free end 17, to which a charging plug (not shown) can be connected, and a connection end 8, which is secured in a clamping block 9 and led from there to a voltage source.

[0083] The clamping block 9 and an outlet guide 10 with a protective roller arrangement 16 are arranged on a support arm 11, which in turn is attached to the guide profile 134. The clamping block 9 comprises two identical plastic parts that form a passage whose diameter is smaller than the cable diameter, so that the cable 3 can be gently clamped in this passage. The protective roller arrangement 16 comprises three U-shaped, rotatably mounted protective rollers 37.

[0084] The roller assemblies 109, 110 each comprise a plurality of arc-shaped rollers 140 distributed over a circular arc around an imaginary deflection axis, with roller groups comprising a plurality of rollers 140, here four rollers, arranged in an arc-shaped manner distributed over a circular arc. The second roller assembly 110, together with all of its rollers 140 distributed over a circular arc, is arranged on the linearly guided, displaceable roller assembly carrier 113 and is adjustable with it.

[0085] Each of the two roller assemblies 109, 110 comprises roller groups or rollers 140, which are arranged distributed over a circular arc whose arc measure is slightly less than 180°. In each of the two roller assemblies 109, 110, at least four, here five, roller groups are arranged at the same angular distance around an imaginary deflection axis, which is perpendicular to a guide plane that defines the guide profile 134 for the roller assembly carrier 113.

[0086] As can be seen in particular from Figures 3a to 3d, each of the two essentially identically constructed roller packages 109, 110 comprises a semicircular frame 142 with roller axes 141 evenly distributed over the circular arc section. Each roller axis 141 supports four coaxially arranged rollers 140.

[0087] All rollers 140 are preferably designed as cable-protecting plastic rollers with an approximately semicircular cross-sectional profile for holding and guiding the cable 3. The roller axes 140 of the roller group are each held and fastened to two axially opposite, structurally identical support elements 150 in a lattice or skeleton construction, which define the circular arc for the roller axes 141.

[0088] As can be seen in particular from Figure 3d, rollers 140 arranged one behind the other in the arc direction are mounted on the roller axes 141 so as to be axially offset from one another, so that any offset of the cable 3 during the transition from one roller pack 109, 110 to the next roller pack 109, 110 is minimized. Each roller pack is positioned offset by a few millimeters from the following roller pack, so that the cable has to overcome no or only a very slight offset at the transition from one roller pack 109, 110 to the other.

[0089] Each frame 142 is designed such that it forms a roller cage or roller block for securely holding the individual windings of the cable 3 on the rollers 140. Each roller assembly 109, 110 comprises securing webs 151, offset radially outwardly from the roller axes 141, which are arranged at a regular angular distance from one another and which are attached to one of the two support elements 150 in a hinged or pivotable manner.

[0090] Figure 3a shows the safety bars 151 in the closed and pivoted-in state. Figure 3b shows the safety bars in the open or folded-up state.

[0091] The roller assemblies 109, 110, together with the cable 3 placed thereon and wound in several turns, form a pulley block, wherein a pull on the free end 17 of the cable (a plug is not shown for the sake of simplicity) causes the cable 3 to be pulled out in such a way that the roller assemblies support 113 is raised in the direction of the first roller assemblies 109, whereby the cable sections located between the roller assemblies 109, 110 are shortened and the pull-out length of the cable 3 is increased. The distance by which the cable 3 can be pulled out is naturally a multiple of the distance between the roller assemblies 109, 110 from one another, wherein the force which must be applied in this case is a fraction of the force which acts on each individual section of the cable 3.

[0092] As can be seen in particular from the longitudinal section through the feed system 1 shown in Figure 2, the roll package carrier 113 is designed as a holding plate with a U-shaped profile in cross-section, to the legs 18 of which guide rollers 19a, 19b are fastened, which are supported within the guide profile 134 between guide webs 2 and the rear wall of the guide profile 134. The guide profile 134 is designed in cross-section as a C-shaped profile, the profile legs 12 of which overlap the roll package carrier 113.

[0093] In the example shown in Figure 2, two groups each with four guide rollers 19a, 19b are provided, which are supported in two vertical directions against tilting on the inside of the guide profile 134. The guide rollers 19a are supported against tilting about the imaginary deflection axis of the roller package 110, and the guide rollers 19b are supported against tilting about a horizontal axis perpendicular to the imaginary deflection axis. Instead of a guide with rollers that engage the inside of the guide profile 134, a reverse arrangement is also possible, with a guide on the outside of a corresponding profile. However, the inside guide offers better protection for the guide.

[0094] The roller assembly support 113 and the guide profile 134 engage with each other in a form-fitting manner, such that any rotational or tilting movement about an axis perpendicular to the direction of displacement of the roller assembly support 113 is prevented. The cross-sectional profiles of the guide profile 134, on the one hand, and of the roller assembly support 113, on the other hand, are each designed as U-profiles; however, these could also be designed as interlocking C-profiles. Furthermore, instead of a roller guide, a sliding guide can also be provided between the profiles.

[0095] The roller assembly carrier 113 is displaceable against the spring force of two expander cables 21a in the direction of the stationary upper first roller assembly 109. The expander cables 21a are fastened on the one hand to the rear of the roller assembly carrier 113 and on the other hand to the guide profile 134. On the guide profile 34, two deflection rollers 20 for the expander cables 21a are arranged at its upper and lower ends. The expander cables 21a each act as spring elements which generate a restoring force for the roller assembly carrier 113. These are guided above and below over the deflection rollers 20 in several mutually parallel sections. A displacement of the roller assembly carrier 113 in the direction of the first upper roller assembly 109 takes place against the spring force of the

[0096] Expander ropes 21 a , which generate a restoring force increasing proportionally to the extension path of the cable 3 .

[0097] Alternatively, the restoring force for the roller package carrier 113 can be generated via other spring elements, for example via gas springs, spiral springs or the like.

[0098] The guide profile 134 can be designed as a central guide column, which, for example, includes a base plate 36 for free installation on a flat surface. Alternatively, the guide profile 134 can be designed with appropriate fastening means (not shown) for wall mounting.

[0099] In principle, the feeding system 1 can comprise a housing (not shown), which, however, does not have a supporting function but only serves to cover the feeding system 1.

[0100] The feed system 1 according to the invention further comprises a return stop which acts between the roller assembly carrier 113 and the guide profile 134 and with which the displaceable lower, second roller assembly 110 can be blocked in a plurality of discrete, i.e., countable, positions. This blocking or locking can be released by a user by pulling on the cable and displacing the lower, second roller assembly 110 in certain predetermined positions of the roller assembly carrier 113.

[0101] The backstop is explained below using Figures 5a to 5c.

[0102] The roller assembly carrier 113 comprises two pivotally mounted locking pawls 4, which are forced or loaded by a spring into a relief position shown in Figure 5b. One of the locking pawls 4 is shown in various views 6a to 6d. The pivotally articulated on the roller assembly carrier 113

[0103] Each pawl 4 interacts with a hole pattern 135 of the guide profile 134. The hole pattern 135 comprises two parallel, spaced-apart hole pattern tracks 136, which extend in the longitudinal direction of the guide profile 134 and comprise a plurality of smaller, rectangular holes 137 and a plurality of larger, rectangular holes 138. In the described embodiment, each hole pattern track 136 contains four smaller holes 137 arranged directly one behind the other between two larger holes 138. The smaller holes 137 each define locking positions for the roller assembly carrier 113, whereas the larger holes 138 each form release positions for the pawls 4, in which the roller assembly carrier 113 can be freely displaced vertically in any direction.

[0104] The interaction of the locking pawls 4 with the hole pattern 135 can be seen in views B, D, and F in Figures 5a to 5c, respectively. Details B, D, and F are shown in Figures 4b, 4d, and 4f, respectively, in connection with a position of the second lower roller assembly 110 and the roller assembly carrier 113, respectively.

[0105] The design of the pawls 4 can be seen in particular in Figures 6a to 6d. Each of the pawls 4 comprises a locking tooth 6 and a sliding tooth 7, which are arranged parallel to one another in the direction of a pivot axis of the pawls 4 and offset from one another in the circumferential direction. The sliding tooth 7 is somewhat narrower in the direction of the pivot axis than the locking tooth 6, which is larger due to the weight of the lower roller assembly 110 that it has to absorb. The locking tooth 6 interacts with the smaller holes 137 of the hole pattern 136, whereas the guiding tooth 7 rests on the surface of the guide profile 134 not traversed by holes 137, 138, both in a locked position and in a released position, and acts as a pivot limit stop for the pawl 4. Each pawl 4 comprises on its outer circumference 3 eyelets 13 arranged at the same angular distance from one another, which serve to fasten the springs 5.

[0106] The larger holes 138 are wider than the smaller holes 137, i.e., they have a greater extent in a direction transverse to the direction of displacement of the roller assembly carrier 113 than the smaller holes 137. The width of the larger holes 138 is slightly larger than the entire width of the locking pawl 4, so that the locking pawls 4 can fully engage in the larger holes 138 in the relief position or neutral position.

[0107] The unloaded position of the pawl 4 is shown in Figure 5b (Detail D). The springs 5 ​​acting on the pawls 4, which can be designed, for example, as spiral springs, hold the pawls 4 in the unloaded position shown in Figure 5b, i.e., in the 3:00 p.m. position when viewed from the side. Pivoting the pawls 4 clockwise and counterclockwise (relative to the side view in Figure 5) causes the pawl 4 to deflect against the restoring force of the spring 5. Starting from the relief position shown in Figure 5, in which the relevant pawl 4 is fully immersed in the larger hole 138, the roller pack carrier 113 with the lower roller pack 110 can be displaced both upwards in the direction of the upper roller pack 109 and downwards away from the upper roller pack 109.If the roller assembly carrier 113 of the lower roller assembly 110 is displaced upwards by pulling on the cable 3, the locking pawl 4 is deflected counterclockwise into a position as shown in Figure 5a (Detail B). The locking tooth 6 and the smaller sliding tooth 7 disengage from the large hole 138 and, upon an upward movement of the roller assembly carrier 113, the locking pawl 4 slides over the hole pattern 136, with the sliding tooth 7 resting on the unperforated surface of the guide profile 134 and acting as a pivot limit stop for the locking pawl 4. If the roller pack carrier 113 with the lower roller pack 110 moves in the opposite direction, i.e. away from the upper roller pack 109, the locking element 6 engages in the smaller holes 137 in such a way that a downward movement of the roller pack carrier is blocked.

[0108] Starting from the relief position or neutral position of the pawl 4 shown in Figure 5b (Detail D), strain relief of the cable 3 causes the pawl 4 to deflect counterclockwise, disengaging it from the larger hole 138. This pivoting movement also takes place against the spring force of the spring 5. In this case, the roller assembly carrier 113 with the lower roller assembly 110 can be moved into the lower position shown in Figure 1a, with the sliding tooth 7 resting on the uninterrupted, smooth surface of the guide profile 134 and holding the locking tooth 6 out of engagement with the hole pattern 136.

[0109] Reference is now made to Figures 7 to 10A-10B, which show a second embodiment according to the invention. A significant difference is the simpler construction of the roller assemblies, which, however, require more height compared to the first example.

[0110] The feed system 201 comprises a cable storage unit for a cable 3 used as a charging cable for an electric vehicle. The cable storage unit of the feed system 201 comprises a first, upper, stationary roller assembly 209 and a second, lower roller assembly 210 that is movable relative thereto. The first roller assembly 209 is mounted on a first axis 211 that is cantilevered on a guide profile 234 of a frame 235, whereas the second roller assembly 210 is mounted on a second axis 212 that is cantilevered on a roller assembly support 213 that is movable along the guide profile 234. As can be seen from Figures 10A-10B, the guide profile 234 is designed as a profile rail with a C-shaped cross section that is supported against the ground by means of a base plate 236 and is attached to the ground.The roller assembly carrier 213, to which the movable roller assembly 210 is fastened, is arranged displaceably within the guide profile 234 so that the roller assemblies 209, 210 can be moved towards and away from each other.

[0111] The roller sets 209, 210 each comprise four individually rotatable rollers 214, which in turn are composed of individual roller discs. The rollers 214 are each mounted on ball bearings 216, which are located on the axles 211, 212.

[0112] The roller assemblies 209, 210, together with the cable 3 placed thereon and wound in several turns, form a pulley block, wherein pulling on the free end 217 of the cable 3 (a connector is not shown for simplification) causes the cable 3 to be pulled out in such a way that the roller assemblies support 213 is raised toward the first roller assemblies 209, whereby the cable sections located between the roller assemblies 209, 210 shorten and the pull-out length of the cable 3 increases. The distance by which the cable 3 can be pulled out is naturally a multiple of the distance between the roller assemblies 209, 210, whereby the force applied is a fraction of the force acting on each individual section of the cable 3.

[0113] The roller assembly carrier 213 is designed as a holding plate with a U-shaped cross-section, to the legs 218 of which guide rollers 219a, 219b are fastened, which are guided within the guide profile 234 between guide webs and the rear wall of the guide profile 234. In the example according to Figures 7-10, as Figure 10b shows, two groups of four guide rollers 219a, 219b are provided, which are supported in two vertical directions on the inside of the guide profile 234 to prevent tilting. The guide rollers 219a provide support against tilting about the axis of rotation of the roller assembly 210, and the guide rollers 219b provide support against tilting about a horizontal axis perpendicular to the axis of rotation. Instead of a guide with rollers that engages the inside of the guide profile 234, a reverse arrangement is also possible, with a guide on the outside of a corresponding profile. However, the inside guide offers better protection for the guide.

[0114] The roller assembly support 213 can be displaced against the spring force of two expander cables 221a in the direction of the stationary upper first roller assembly 209. The expander cables 221a are fastened on the one hand to the rear of the roller assembly support 213 and on the other hand to the guide profile 234. Two deflection pulleys 220 for the expander cables 221a are arranged on the guide profile 234 at its upper and lower ends. The expander cables 221a, as spring elements which generate a restoring force for the roller assembly support 213, are guided above and below over the deflection pulleys in several mutually parallel sections.

[0115] A displacement of the roller assembly support 213 toward the first upper roller assembly 209 occurs counter to the spring force of the expander cables 221a, which generate a restoring force that increases proportionally to the cable extension path. Due to the fact that an expander cable 221a is guided over an upper and a lower deflection pulley 220, it is possible to provide relatively long spring elements 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 they can pull the cable 3 out of the cable storage unit with almost constant force.

[0116] Thanks to the guide profile 134 or 234, a housing of any design (not shown) can be used with the feed system proposed here, which is preferably composed of several housing parts. The invention is, of course, to be understood in such a way that the type of cable 3 is not important for the feed system. Other designs with guide profiles and roller package supports that are complementary to one another are also within the scope of the invention. List of reference symbols

[0117] FIGS. 1-6

[0118] 1 feeding system

[0119] 2 guide bridges

[0120] 3 cables

[0121] 4 pawls

[0122] 5 springs

[0123] 6 locking teeth

[0124] 7 sliding tooth

[0125] 8 connection send

[0126] 9 Terminal block

[0127] 10 Outlet guide

[0128] 11 Holding arm

[0129] 12 Prof il schenke!

[0130] 13 eyelets

[0131] 16 protective roller arrangement

[0132] 17 free end of the cable

[0133] 18 Legs of the roller package carrier

[0134] 19a first leadership roles

[0135] 19b second leadership roles

[0136] 20 pulleys

[0137] 21a Expander rope

[0138] 36 base plate

[0139] 37 protective rolls

[0140] 109 first roll package

[0141] 110 second roll package

[0142] 113 Roll package carrier

[0143] 134 Guide profile 135 Hole pattern

[0144] 136 breadboard tracks

[0145] 137 smaller holes

[0146] 138 larger holes

[0147] 140 rolls

[0148] 141 roller axle

[0149] 142 semicircular frame

[0150] 150 support element

[0151] 151 Safety bar (foldable)

[0152] FIGS. 7-10

[0153] 3 cables

[0154] 201 Feeding system

[0155] 204 front profiles

[0156] 205 side panels

[0157] 209 first roll package

[0158] 210 second roll package

[0159] 211 first axle

[0160] 212 second axle

[0161] 213 roll package carriers

[0162] 214 rolls

[0163] 215 roller discs

[0164] 216 ball bearings

[0165] 217 free end of the cable

[0166] 218 Legs of the roller package carrier

[0167] 219a first leadership roles

[0168] 219b second leadership roles

[0169] 220 pulleys

[0170] 221a expander rope

[0171] 221b (tensile) rope

[0172] 222 first attachment point

[0173] 223 second attachment point

[0174] 234 Leadership Profile

[0175] 235 frame

[0176] 236 base plate

Claims

Claims Feeding system (1) for an electrical line, in particular for a cable (3) for charging electric vehicles, comprising at least one cable storage unit, wherein the cable storage unit comprises a plurality of rollers (140) arranged in at least two roller packs (109, 110) such that a cable (3) can be sheared into the roller packs (109, 110) in several turns, wherein a first roller pack (109) and a second roller pack (1110) are displaceable relative to each other, at least one of the first and second roller packs (109, 110) is arranged on a linearly guided, displaceable roller pack carrier (113), and the first and the second roller pack (109, 110) are movable towards each other against a restoring force, characterized in that the roller pack carrier (113) is guided on and / or in at least one guide profile (134) which is designed as a guide rail or forms at least one guide rail.that the roller pack carrier (113) is designed as a profile complementary to the guide profile (134) and that the guide profile (134) and the profile of the roller pack carrier (113) interlock in such a positive-locking manner that tilt- and rotation-proof linear guidance of the roller pack carrier (113) in the displacement direction is achieved. Feeding system (1) according to claim 1, characterized in that the guide profile (134) is designed as a central, self-supporting, adjustable guide column. Feeding system (1) according to one of claims 1 or 2, characterized in that the first roller assembly (109) is fixed in position and that the second roller assembly (110) is displaceable on the roller assembly carrier (113) relative to the first roller assembly (109). Feeding system (1) according to one of claims 1 to 3, characterized in that the roller assembly carrier (113) is designed as a slide which is supported on guide rollers (19a, 19b) and / or on sliding guides on guide webs (2, 18) or profiled belts of the guide profile (134).Feeding system (1) according to any one of claims 1 to 4, characterized in that the second roller assembly (110) is attached to the roller assembly carrier (113) on one side and cantilevered, wherein preferably at least one roller assembly (109, 110) has several rollers (140) arranged in an arc around a deflection axis and at least one of the first and second roller assemblies (109, 110) is arranged and held on the displaceable roller assembly carrier (113). Feeding 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 assembly carrier (113) as part of a return stop acting against the restoring force. Feeding system (1) according to claim 6, characterized in that the backstop is designed as a pawl lock.Feeding system (1) according to claim 6 or 7, characterized in that the return lock in the displacement direction of the roller pack carrier (113) has a plurality of discrete locking positions and a plurality of. The feed system (1) comprises discrete relief positions for at least one pawl (4) deflectable against a spring force, provided between the locking positions and preferably mounted on the roller pack carrier (113) so as to deflect against a spring force. The feed system (1) according to one of claims 1 to 8 is characterized in that the guide profile (134) has at least one [position] that is oriented in the displacement direction of the roller pack carrier. (113) The perforated grid (135) comprises a plurality of first smaller holes (137), each forming a locking position for a pawl (4) engaging therein, and a plurality of second larger holes (138), each forming a release position for a pawl (4) dipping into them. Feeding system (1) according to one of claims 6 to 9, characterized in that the return lock comprises at least one pawl (4) having at least one locking tooth (6) and at least one sliding tooth (7), wherein the locking tooth (6) is designed to engage the perforated grid (135) in a blocking manner and the sliding tooth (7) is arranged offset parallel to a pivot axis of the pawl (4) and is designed as a pivot limit stop for the pawl (4).Feeding system (1) for an electrical line, in particular for a cable (3) for charging electric vehicles, wherein the feeding system comprises at least one cable storage unit, wherein the cable storage unit comprises a plurality of rollers (140) arranged in at least two roller packs (109, 110) such that a cable (3) can be sheared into the roller packs (109, 110) in several turns, wherein a first roller pack (109) and a second roller pack (110) are displaceable relative to each other, at least one of the first and. a second roller package (109, 110) is arranged on a linearly guided, displaceable roller package carrier (113), and the first and the second roller package can be moved towards each other against a restoring force, characterized in that the roller package carrier (113) is guided on and / or in a guide profile, which is designed as a guide rail, and that at least one return lock acting against the restoring force is provided for at least one roller package carrier, which acts between the guide profile and the roller package carrier and which is preferably designed as a ratchet lock.Feeding system (1) according to claim 11, characterized in that the return stop comprises, in the displacement direction of the roller pack carrier (113), a plurality of discrete locking positions and a plurality of discrete release positions provided between the locking positions for at least one pawl, which is preferably mounted on the roller pack carrier (113) so as to be deflectable against a spring force. Feeding 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 extending and continuing in the displacement direction of the roller pack carrier (134) as part of the return stop.Feeding system (1) according to one of claims 11 to 13, characterized in that the guide profile (134) comprises at least one perforation grid (135) extending and continuing in the displacement direction of the roller pack carrier, that the perforation grid (135) comprises a plurality of first smaller holes (137), each forming a locking position for a pawl (4) engaging therein, and that the perforation grid (135) comprises a plurality of second larger holes. (138) comprises, each forming a relief position for a pawl (4) dipping into it. Feed system (1) according to one of claims 11 to 14, characterized in that the return stop comprises at least one The pawl (4) comprises at least one locking tooth (6) and at least one sliding tooth (7), wherein the locking tooth (6) is designed to engage the grid of holes (135) in a blocking manner and the sliding tooth (7) is arranged offset parallel to a pivot axis of the pawl (4) and is designed as a pivot limit stop for the pawl (4). Feeding system (1) according to one of claims 11 to 15, characterized by one or more of the characterizing Features from any one of claims 1 to 10, in particular any one of claims 1 to 5.

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