DE202019102323U1 - Retractable cord system - Google Patents

Abstract

Cable retraction system (1) for retracting a charging cable for an electric vehicle, comprising a housing (2) with
a cable (3) having a first cable end (4) and a second cable end (5), a first deflection roller (6) and a lever arm (7), wherein
the lever arm (7) is pivotably attached to the housing (2) at a hinge point (8) and is arranged substantially horizontally in a basic position,
the first deflection roller (6) is fastened to the housing (2) above the lever arm (7),
the cable (3) is connectable to the charging cable at the first cable end (4), from the first cable end (4) via the first deflection roller (6) to the lever arm (7) and at the second cable end (5) at an anchor point (9) is attached, and
the lever arm (7) is pivotally connected to the cable (3) between the second cable end (5) and the first deflecting roller (6) from the basic position at a traction point (10) and the traction point (10) is spaced from a first lever length (11). is arranged to the pivot point (8).

Description

Technical field

The invention relates to a cable feed system for pulling in a charging cable for an electric vehicle comprising a housing with a cable having a first cable end and a second cable end and a first guide roller. The invention further relates to a charging station having a cable entry system for retracting a charging cable for an electric vehicle.

Technological background

Charging devices for electric vehicles are known from the prior art and are also referred to as charging stations, charging stations or charging points. A charging device often has a plurality of charging ports, which are configured in the simplest case as a socket and into which a charging cable for "fueling" an electric vehicle can be inserted or have such a charging cable for connection to the electric vehicle. According to the widespread Standard IEC 6185-1 the charging cable can be firmly connected to the electric vehicle, be provided on both sides with a connector or be firmly connected to the charging port. Connectors for connecting the charging cable are often in Europe after the Standard IEC 62196 configured, for example, as a so-called Combo 2 connector or DC charging connector with up to 240 kW at 200-600 V DC and up to 400 A DC. In addition, there are other standards for connectors, such as the common in Japan standard CHAdeMO or common in North America standard SAE J1772. High-voltage contactor switches are provided in the charging connections, for example according to the standard ISO 6469-3 to turn on and off the DC power to refuel the EV.

So that an electric vehicle can be charged to a charging device regardless of the positioning of the charging plug on the electric vehicle and regardless of the parking direction of the electric vehicle to the charging device, the charging cables provided often have a length of, for example, over 4 meters. However, such a long charging cable can be unwieldy and should therefore be run while charging so that they do not have to be pulled over the floor, for example. In addition, when not in use, the charging cables should be properly and easily accessible on the charging device and should not touch the ground.

Often, such charging cables are therefore connected at one point to a retractable rope which holds the charging cable in an initial position and can be pulled out while charging by pulling on the charging cable so that the full length of the charging cable can be used. For this purpose known from the prior art solutions use for such cable retraction spring return, spring drums or balancers, also known as counterbalance.

A problem of such cable retraction systems, however, is that the restoring force of the aforementioned spring returns, spring drums or balancers can not be adapted well to the application as a cable entry system. Insofar there is room for improvement in the reliability and manufacturability of such cable entry systems.

Summary of the invention

Based on this situation, it is an object of the invention to provide an improved cable entry system for retracting a charging cable for an electric vehicle.

The object is solved by the features of the independent claims. Advantageous embodiments are specified in the subclaims.

Accordingly, the object is achieved by a cable pull-in system for pulling in a charging cable for an electric vehicle, comprising a housing with a cable having a first cable end and a second cable end, a first guide roller and a lever arm, wherein the lever arm pivotally attached to a pivot on the housing and is arranged substantially horizontally in a basic position, the first pulley is attached to the housing above the lever arm, the cable is connectable to the charging cable at the first end of the rope, from the first end of the rope over the first guide pulley to the lever arm and at the second end of the rope is attached to an anchor point, and the lever arm at a traction point with the rope between the second end of the rope and the first guide pulley from the basic position pivotally connected and the pulling point is arranged at a distance of a first lever length to the pivot point.

An essential point of the invention is therefore that a charging cable can be connected to a rope, which can be pulled out at the first end of the rope. Due to the course of the rope on the first pulley, the rope is directed in the direction of the lever arm, which is connected to the tow point with the rope. The second end of the rope is attached to the anchor point. By pulling the rope, the lever arm is pivoted from a substantially horizontal basic position. The lever arm pivots about the hinge point where it is attached to the housing. For the pivoting of the lever arm while a force be overcome, which counteracts the pulling out of the rope. By this force, the rope is retracted accordingly when the charging cable is no longer needed, so that the lever arm pivots back to the basic position. In this case, a comparatively large restoring force is generated by the substantially horizontally disposed lever arm in the basic position, which is why an optionally attached to the first end of the cable charging cable is securely held in a starting position.

If the charging cable for charging an electric vehicle in the direction of the electric vehicle pulled, a corresponding force is applied, by which the cable is pulled out and the lever arm is pivoted accordingly. In this case, the restoring force with increasing angle of pivoting is always smaller when pivoting the lever, because the leverage of the lever arm in an oblique orientation is less than the leverage of the lever arm in a horizontal orientation. Thus, after initially overcoming a comparatively large restoring force, the charging cable can be easily pulled from the charging station to the electric vehicle. In addition, the charging cable can be gently brought back into the normal position after charging. It is, by the lowering of the pivoted lever arm back to the normal position, the restoring force when retracting continuously increased again. Thus, the charging cable does not jerk quickly back to the starting position, but is gently led back to the charging station and held there with the comparatively large initial restoring force.

Compared to known from the prior art cable entry systems can be achieved with the proposed Kabeleinzugssystems in an advantageous manner that a restoring force acting against pulling out of the rope, depending on the extension length can be adjusted. This results in customization options that are not possible with known cable entry systems. In addition, the proposed cable entry system is particularly reliable and easy to produce, since it has, for example, no springs and is made entirely of components, which is inherently high reliability.

The housing of the cable entry system may be the housing of an entire charging station or even a frame which has at least sufficient attachment points for the attached parts of the cable entry system. The housing may be made of plastic and / or metal, for example. In particular, it can be provided that the housing is as stable as possible and as possible not deformed when force is applied by the use of the cable entry system. The rope can be made of plastic, natural fiber or steel, for example. In particular, the rope should be designed for a force provided by the application. In addition, it can be provided that the rope does not have too great elasticity, so that an attached charging cable can not be undesirably withdrawn abruptly. The lever arm may also be made of plastic or metal, for example. The charging station, the housing and / or the cable entry system is preferably part of or designed as a charging station for electric vehicles, which is modeled in its design of a dispenser for conventional fuels. Colloquially, a charging station is called a charging station, charging station and in regulatory documents charging point. Charging stations may be public or non-public.

According to a preferred embodiment, it is provided that the lever arm has a lever weight at a distance of a second lever length to the pivot point and the second lever length is preferably variable by moving the lever weight between the pivot point and the towing point. This can be achieved in an advantageous manner that the restoring force is increased. In particular, the restoring force can be adjusted by the mass of the lever weight. In addition, the restoring force can be variably adapted to the application by moving the lever weight. For example, in a proposed cable entry system at a charging station an existing charging cable exchanged for another, for example, heavier, charging cable, the restoring force can be easily adjusted to the needs of the new charging cable with the proposed cable entry system. In addition, the proposed cable entry system can thus be prepared the same for a variety of different applications. An adaptation to the specific application can then take place during the installation. Thus, the proposed cable entry system is particularly flexible. The shifting of the lever weight can for example be achieved in that the lever arm has a rail, wherein the lever weight can be moved along the rail. In addition, it can be provided that the lever weight can be locked at the desired location on the lever arm. Depending on the position of the lever weight can therefore be selected the mass of the lever weight. If the lever weight is to be close to the traction point, a smaller lever weight can be selected in comparison with a lever weight closer to the pivot point in order to achieve the same restoring force.

It is provided according to a preferred development that the rope between the first guide pulley and the second end of the rope runs over a pulley block, the pulley a has first pulley and the first pulley roller connects the tow point with the rope. As a result, it can be achieved in an advantageous manner that it is adjustable how much the restoring force changes during extension as a function of a pull-out length. In particular, can be achieved by the fact that the rope can be pulled out by a multiple of the distance that covers the tow point when pivoting the lever arm. For example, the extraction length can be doubled with a first pulley roller.

The pulley may, according to a preferred embodiment, at least a second pulley roller and the second pulley is attached above the first pulley on the housing. This can be achieved in an advantageous manner that the rope is deflected several times between the first pulley and the second pulley, so that an even greater extension length can be achieved.

According to a preferred development, it is provided that the anchor point above the lever arm is preferably arranged at the level of the first deflection roller. This can be achieved in an advantageous manner that an increase in the restoring force with the extension length is substantially linear.

It may be provided according to a preferred development that the anchor point is arranged at the traction point or the housing. It is particularly preferred that the anchor point is arranged on the housing.

According to a preferred development, it is provided that the cable feed system has at least one second and / or third deflection roller, wherein the second deflection roller is fixed at the same height as the first deflection roller horizontally offset on the housing and / or the third deflection roller is arranged below the first deflection roller Preferably, the cable between the second and third deflection roller preferably runs substantially vertically. This can be achieved in an advantageous manner that the rope can be deflected particularly stable to the lever arm. In particular, this can also be achieved that the rope does not jump from the pulleys in use. In addition, the restoring force and the course of the restoring force can be influenced as a function of the pull-out length of the rope by the position of the last deflection roller in front of the lever arm.

According to a preferred development, it is provided that at least the cable, the first deflection roller and the lever arm are arranged substantially in the same vertical plane. This can be achieved in an advantageous manner that the different parts can work very well together.

According to a preferred development of the cable entry system, it is provided that the first lever length is ≥ the second lever length. This can be achieved in an advantageous manner, that the lever weight between the first lever length and the pivot point can be displaced without having to loosen the rope from the tow point.

According to a preferred embodiment, it is provided that the anchor point, in the basic position of the lever arm, is arranged horizontally in the longitudinal direction of the lever arm between the pull point and the pivot point. This can be achieved in an advantageous manner that a particularly linear course of the restoring force can be adjusted depending on the extension length.

The rope can be pulled out according to a preferred development at the first end of the rope to a Ausziehlänge from the housing against a caused by pivoting of the lever arm restoring force. By pivoting the lever arm can be achieved that the restoring force falls against the pull-out of the rope with the extension length.

According to a preferred development, it is provided that the restoring force with a pull-out length of 0 cm is a force of ≥ 60 N to ≦ 100 N, preferably ≥ 75 N to ≦ 85 N, in particular 80 N. This can be achieved in an advantageous manner that conventional charging cable are held strong enough in a starting position and at the same time can be easily pulled out by a user.

According to a preferred development, the restoring force at a pull-out length of 80 cm can be a force of ≥ 20 N to ≦ 60 N, preferably of ≥ 35 to ≦ 45 N, in particular 40 N. This can be achieved in an advantageous manner that conventional charging cable can be used in loading with its full length without the rope pulls too much on the charging cable, at the same time the charging cable after use by gently lifting.

According to a preferred embodiment of the cable entry system described above, it is provided that the restoring force drops substantially linearly with the extension length. As a result, a particularly uniform extension can be achieved in an advantageous manner, whereby a particularly good applicability and a particularly valuable impression can be achieved. A linear course of the restoring force also offers the advantage that the rope does not snap back too much when pulling, but in the extended state by the weight of the charging cable remains extended, as long as the charging cable is not raised. If the charging cable is then raised, the low restoring force is sufficient to gently pull in the rope. In this case, the restoring force increases continuously when retracting, so that the retracted charging cable can still be kept well in the normal position.

According to a preferred embodiment, it is provided that the first end of the rope has a roller for guiding the charging cable. This can be achieved in an advantageous manner that the charging cable does not have to be firmly attached to the rope and thus an even greater flexibility in the mobility of the charging cable can be achieved.

The object is further achieved by a charging station having a proposed cable entry system and the charging cable, wherein the charging cable is connected to the first end of the cable and the cable is preferably guided by a roller at the first end of the rope. With a proposed charging station, electric vehicles can be charged particularly well, since the charging cable can be easily inserted with controlled effort regardless of the position of the charging plug on the electric vehicle.

The cable entry system can be installed, for example, in an upper region of a housing of the charging station. It can be provided that the housing of the cable entry system is the housing of the charging station.

list of figures

The invention will be explained in more detail with reference to the accompanying drawings with reference to preferred embodiments.

• 1 ein Kabeleinzugssystem zum Einziehen eines Ladekabels für ein Elektrofahrzeug gemäß einem ersten bevorzugten Ausführungsbeispiel der Erfindung in einer schematischen Ansicht in Grundstellung, und
• 2 das Kabeleinzugssystem gemäß 1 in einer schematischen Ansicht nach Ausziehen des Kabeleinzugssystems.

Show it:

• 1 a cable retraction system for retracting a charging cable for an electric vehicle according to a first preferred embodiment of the invention in a schematic view in basic position, and
• 2 the cable entry system according to 1 in a schematic view after pulling out of the cable entry system.

Description of the embodiments

1 and 2 show a cable entry system for retracting a charging cable for an electric vehicle according to a preferred embodiment in a schematic, not to scale view. The cable entry system 1 has a housing 2 , a rope 3 with a first rope end 4 and a second end of the rope 5 , a first pulley 6 and a lever arm 7 on. The lever arm 7 is at a pivot 8th on the housing 2 attached pivotally. The first pulley 6 is above the lever arm 7 on the housing 2 attached and the rope 3 is at the first end of the rope 4 connectable to the charging cable. The rope 3 runs from the first end of the rope 4 over the first pulley to the lever arm 7 and is at the second end of the rope 5 attached to an anchor point. The lever arm 7 is at a train point 10 with the rope 3 between the second end of the rope 5 and the first pulley 6 connected. The pull point is at a distance of a first lever length 11 arranged to the pivot.

1 shows the basic position, ie the position in the retracted state in which the lever arm 7 is arranged substantially horizontally. 2 shows a position in the extended state, in which the lever arm 7 from the essentially horizontal basic position around the pivot point 8th was pivoted.

In the embodiment shown, the lever arm 7 also a lever weight 12 at a distance of a second lever length 13 to the pivot 8th on. Here is the second lever length 13 by moving the lever weight 12 between the pivot 8th and the tow point 10 variable. The first lever length 11 is larger than the second lever length 13 , In addition, the embodiment has a pulley with a first pulley 14 on, with the first pulley roller 14 the tow point 10 connects to the rope by pulling the rope between the first pulley 6 and the second end of the rope 5 runs over the pulley.

The anchor point 9 is above the lever arm at the height of the first pulley 6 on the housing 2 arranged. Here is the anchor point, in the basic position of the lever arm 7 , horizontally in the longitudinal direction of the lever arm 7 between the tow point 10 and the pivot 8th arranged.

In addition, the cable entry system 1 a second pulley 15 on, at the same height as the first pulley 6 horizontally offset on the housing 2 is attached. A third pulley 16 is below the first pulley 6 arranged, wherein the third deflection roller 16 so on the case 2 attached is that the rope 3 between the second pulley 15 and the third pulley 16 runs vertically. The rope 3 , the first, second and third pulley 6 . 15 and 16 , the lever arm 7 and the first pulley roller 14 are arranged in the same vertical plane.

At the first end of the rope 4 is the rope 3 about a pull-out length 17 against one by pivoting the lever arm 7 caused Restoring force 18 Extendable. In 1 is the cable entry system 1 in a home position, with the extension length 17 for example, 0 cm. When pulling out, the lever arm 7 through the rope 3 at the train point 10 raised and pivoted. By the mass of the lever arm 7 and in particular by the lever weight 12 acts a restoring force 18 for example, 80 N against the pull-out of the rope 3 ,

2 shows the cable entry system 1 in the extended state, the extension length 17 for example, 80 cm. The pivoted lever arm causes this 7 a restoring force 18 for example 40 N.

By the restoring force 18 will be pulling in the rope 3 causes. This is the lever arm 7 swung back into its essentially horizontal basic position. By the above-described embodiment is thus the restoring force 18 in a retracted ground state, for example, twice as large as the restoring force 18 in an extended state with a pull-out length 17 for example, 80 cm. It is by the above-described arrangement of the various pulleys and thus in particular by the course of the rope 3 and its interaction with the lever arm 3 a substantially linear course of the restoring force 18 depending on the extension length 17 possible, which results in advantages for the application.

The exemplary embodiments described are merely examples which can be modified and / or supplemented in many ways within the scope of the claims. Each feature described for a particular embodiment may be used alone or in combination with other features in any other embodiment. Each feature described for one embodiment of a particular category may also be similarly employed in an embodiment of another category.

LIST OF REFERENCE NUMBERS

1

Retractable cord system

2

casing

3

rope

4

first rope end

5

second rope end

6

first pulley

7

lever arm

8th

crucial point

9

anchor point

10

Pulling point

11

first lever length

12

lever weight

13

second lever length

14

first pulley roller

15

second deflection roller

16

third pulley

17

Retraction

18

Restoring force

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• Standard IEC 6185-1 [0002]
• Standard IEC 62196 [0002]
• ISO 6469-3 [0002]

Claims (16)

Cable retraction system (1) for retracting a charging cable for an electric vehicle, comprising a housing (2) with a cable (3) having a first cable end (4) and a second cable end (5), a first deflection roller (6) and a lever arm (7), wherein the lever arm (7) is pivotably attached to the housing (2) at a hinge point (8) and is arranged substantially horizontally in a basic position, the first deflection roller (6) is fastened to the housing (2) above the lever arm (7), the cable (3) is connectable to the charging cable at the first cable end (4), from the first cable end (4) via the first deflection roller (6) to the lever arm (7) and at the second cable end (5) at an anchor point (9) is attached, and the lever arm (7) is pivotally connected to the cable (3) between the second cable end (5) and the first deflecting roller (6) from the basic position at a traction point (10) and the traction point (10) is spaced from a first lever length (11). is arranged to the pivot point (8). Cable retraction system (1) according to the preceding claim, wherein the lever arm (7) has a lever weight (12) at a distance of a second lever length (13) to the hinge point (8) and the second lever length (13) preferably by shifting the lever weight (12) between the pivot point (8) and the tow point (10) is variable. Cable pulling system (1) according to one of the preceding claims, wherein the cable (3) between the first guide roller (6) and the second cable end (5) via a pulley, the pulley has a first pulley roller (14) and the first pulley roller (14 ) connects the tow point (10) with the rope (3). Cable pulling system (1) according to the preceding claim, wherein the pulley has at least a second pulley roller and the second pulley roller above the first pulley (14) is attached to the housing (2). Cable entry system (1) according to one of the preceding claims, wherein the anchor point (9) above the lever arm (7) is preferably arranged at the level of the first deflection roller (6). Cable entry system (1) according to one of the preceding Claims 1 to 4 , wherein the anchor point (9) at the draw point (10) or the housing (2) is arranged. Cable feed-in system (1) according to one of the preceding claims, wherein the cable feed system (1) has at least one second and / or third deflection roller (15, 16), the second deflection roller (15) being offset horizontally at the same height as the first deflection roller (6) is attached to the housing (2) and / or the third deflection roller (16) below the first deflection roller (6) is arranged, wherein preferably the cable (3) between the second and third deflection roller (15, 16) preferably extends substantially vertically , Cable retraction system (1) according to one of the preceding claims, wherein at least the cable (3), the first guide roller (6) and the lever arm (7) are arranged substantially in the same vertical plane. Cable entry system (1) according to one of the preceding Claims 2 to 8th wherein the first lever length (11) ≥ the second lever length (13). Cable retraction system (1) according to one of the preceding claims, wherein the anchor point (9), in the basic position of the lever arm (7), is arranged horizontally in the longitudinal direction of the lever arm (7) between the traction point (10) and the hinge point (8). Cable retraction system (1) according to one of the preceding claims, wherein the cable (3) at the first end of the cable (4) by a Ausziehlänge (17) from the housing (2) against a by pivoting of the lever arm (7) effected restoring force (18) extendable is. Cable retraction system (1) according to the preceding claim, wherein the restoring force (18) at a Ausziehlänge (17) of 0 cm, a force of ≥ 60 N to ≤ 100 N, preferably ≥75 N to ≤ 85 N, in particular 80 N. Cable entry system (1) according to one of the preceding Claims 11 or 12 , wherein the restoring force (18) at a Ausziehlänge (17) of 80 cm is a force of ≥ 20 N to ≤60 N, preferably from ≥35 to ≤45 N, in particular 40 N. Cable entry system (1) according to one of the preceding Claims 11 to 13 , wherein the restoring force (18) with the extension length (17) drops substantially linearly. Cable entry system (1) according to one of the preceding claims, wherein the first cable end (4) has a roller for guiding the charging cable. Charging station comprising a cable entry system (1) according to one of the preceding claims and the charging cable, wherein the charging cable is connected to the first cable end (4) and the cable preferably by a roller on the first end of the rope (4) is guided.

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