WO2007101449A1

WO2007101449A1 - Apparatus for winding an electrical cable

Info

Publication number: WO2007101449A1
Application number: PCT/EP2006/001940
Authority: WO
Inventors: Jürgen KLÖPFER; Jürgen Erdmann
Original assignee: Alfred Kärcher Gmbh & Co. Kg
Priority date: 2006-03-03
Filing date: 2006-03-03
Publication date: 2007-09-13
Also published as: EP1992054B1; EP1992054A1; ATE466394T1; PL1992054T3; ES2341670T3; DK1992054T3; DE502006006874D1

Abstract

The invention relates to an apparatus for winding an electrical cable having a cable drum (20), onto which the electrical cable can be wound, and having a bearing body (30), wherein the bearing body has a bearing plate (34), from which a bearing journal (32) protrudes, on which the cable drum is mounted such that it can rotate about an axis of rotation, and wherein at least one slipring (61, 62) and at least one sliding contact (63, 64, 65, 66), which makes contact with said slipring, are arranged between the bearing plate and the cable drum, which slipring and sliding contact are capable of rotating about the axis of rotation in relation to one another and are electrically connected to the electrical cable and a connection cable, respectively. In order to develop the apparatus such that it can be used in high-power high-pressure purification devices without there being the risk of the cable drum overheating, the invention proposes that the bearing plate and the cable drum between them define a contact space, which accommodates the at least one slipring and the at least one sliding contact and is sealed off from spraywater (47, 55, 56, 49, 93) with the aid of a sealing device. In addition, a high-pressure purification device with such an apparatus is proposed.

Description

Device for winding an electric cable

The invention relates to a device for winding an electric cable with a cable drum to which the electric cable can be wound, and having a support body, wherein the support body has a support plate from which projects a support pin on which the cable drum is rotatably mounted about an axis of rotation, and wherein between the support plate and the cable drum at least one slip ring and at least one contact sliding contact are arranged, which are rotatable relative to each other about the axis of rotation and which are electrically connected to the electric cable or a connecting cable.

Such winding devices are used for storing an electric cable, which can be wound onto the cable drum. At the free end of the electric cable usually a connector is held, so that the electric cable can be connected to a power outlet. The connector facing away from the end of the electric cable is connected via the at least one slip ring and the sliding contact, which contacts the slip ring, with a connecting cable in electrical connection, which can be connected, for example, to the motor pump unit of a high-pressure cleaner. This makes it possible to wind the electric cable for storing the high-pressure cleaning device. If the high-pressure cleaner is to be used, then the electric cable can be unwound in the desired length from the cable drum to connect the high-pressure cleaner to the socket. High-pressure cleaning devices with a winding device are known for example from DE 198 51 847 Al. This winding device has no slip rings and no associated sliding contacts, but the electric cable is integrally connected to the connecting cable and is wound around a bobbin by means of a rotating drum.

Winding devices with sliding contacts are known from US Pat. No. 1,288,511. Here, the cable drum is rotatably mounted in a closed housing which completely surrounds the cable drum. This has the advantage that the cable drum and the support body are protected from splash water. However, using the cable drum to power powerful high-pressure cleaning equipment may overheat the cable drum. This is especially to be feared if the electrical cable is unwound from the cable drum during operation of the high-pressure cleaner only incomplete.

The object of the invention is to develop a winding device of the type mentioned in such a way that it can be used to power powerful high-pressure cleaning equipment without the risk of overheating of the cable drum.

This object is achieved in a device of the aforementioned type according to the invention that the support plate and the cable drum define a contact space between them, which receives the at least one slip ring and the at least one sliding contact and which is sealed splash-proof with the aid of a sealing device. By providing the protected from splash water contact space in which the at least one slip ring and the at least one sliding contact is arranged, the cable drum completely surrounding housing omitted, without the risk that the at least one slip ring and the at least one sliding contact by splashing be affected. This has the advantage that waste heat, which develops when using the winding device according to the invention in high-performance high-pressure cleaning devices in the cable drum, can be removed in a simple manner. The risk of overheating the cable drum can be kept low.

The winding device according to the invention is particularly suitable for use in high-pressure cleaning devices, wherein the winding device can be arranged within the housing of the high-pressure cleaning device.

The contact space, which accommodates the at least one slip ring and the at least one sliding contact, is protected from splash water by means of a sealing device. The sealing device preferably has a labyrinth seal. This allows effective splash protection, without the need for additional sealing elements, such as O-rings must be used.

In an advantageous embodiment, the labyrinth seal is formed by at least two annular sealing elements arranged concentrically with respect to the axis of rotation and engaging one another, wherein a first sealing member is integrally formed on the cable drum and a second sealing member is formed on the support plate. Cable drum or support plate and associated sealing are thus connected in one piece with each other. As a result, the assembly of the winding device according to the invention can be simplified.

It is advantageous if one of the two sealing members is designed as an annular groove and the other sealing member as immersed in the annular groove ring collar. The annular groove has two mutually spaced groove walls, which receive the ring collar between them. It is advantageous if at least one groove wall rests flat against the annular collar, because this can be achieved in a structurally simple manner, a particularly effective splash protection.

A particularly simple assembly of the winding device is achieved in an advantageous embodiment, characterized in that the annular collar and the annular groove are aligned coaxially to the axis of rotation. The annular collar can thus be used in the axial direction with respect to the axis of rotation of the cable drum in the annular groove.

Preferably, the labyrinth seal surrounds the contact space in the circumferential direction, so that it is protected against splash water radially on the outside by the labyrinth seal.

It can also be provided that the contact space is bounded radially inwardly by a labyrinth seal. In addition, it can be provided that a labyrinth seal is arranged both radially on the outside and radially on the inside of the contact space. In a preferred embodiment, the labyrinth seal comprises a concentric with the rotational axis aligned first annular wall, which is surrounded by a second annular wall form-fitting manner.

It is advantageous if the first annular wall is integrally formed on the support plate and the second annular wall on the cable drum. Support plate and cable drum may for example be designed as injection molded parts, which are each integrally connected to an annular wall.

As an alternative or in addition to a labyrinth seal, the sealing device may also have at least one elastomeric sealing ring, which rests on a sealing surface splash-proof, wherein the sealing ring and the sealing surface are rotatable relative to each other about the axis of rotation of the cable drum. For example, it may be provided that the contact space is bounded radially on the outside by a sealing ring.

Sealing ring and sealing surface can be rotated relative to each other. It is advantageous if the sealing ring is clamped in the radial direction between the sealing surface and a holding surface. In particular, it can be provided that the sealing surface surrounds the sealing ring in the circumferential direction.

In an advantageous embodiment, the sealing ring has a sealing lip which bears in a sliding manner against the sealing surface. This makes it possible to rotate the sealing surface relative to the sealing ring, without having to overcome large frictional forces, but a splash-proof system of the sealing ring is ensured on the sealing surface. The sealing surface can be arranged for example on the cable drum and the sealing ring can be held on the support plate.

About the structural design of the cable drum so far no details have been made. In a preferred embodiment, the cable drum has a first and a second drum disc, which are connected to one another via a coaxially aligned with the axis of rotation drum sleeve and defining a winding area for receiving the Elektroka- bels between them, wherein the contact space on the side facing away from the winding area of the first drum disc is arranged. The winding area is thereby externally accessible for the discharge of waste heat, in particular it can be exposed to an air flow in order to effectively dissipate the waste heat which may occur. Despite the accessibility of the winding area, it is ensured by the splash-proof design of the contact space arranged next to the winding area that the at least one slip ring and the at least one sliding contact are protected against spray water.

In order to achieve a particularly effective cooling of the winding area, in an advantageous embodiment, at least one drum disk is provided with at least one cooling air opening. This makes it possible, for example, to supply cooling air in the radial direction to the winding area and then to guide it out of the winding area in the axial direction relative to the axis of rotation of the cable drum.

Alternatively or additionally, it may be provided that the drum sleeve, which limits the winding area radially inwardly, has at least one cooling air opening so that cooling air can be led out of the winding area via the drum sleeve.

In an advantageous embodiment, the drum sleeve surrounds a bearing sleeve which is rotatably mounted on the support pin and connected to at least one drum disc, wherein between the drum sleeve and the bearing sleeve, an annular space is arranged, which receives an end portion of the electric cable. Preferably, the bearing sleeve is formed on at least one drum disc.

In the annular space between the drum sleeve and the bearing sleeve usually more wires having electrical cables can be separated, so that for example two wires can each be connected to a slip ring, which is positioned in the contact space and contacted by at least one sliding contact. The sliding contacts can be connected to the wires of the connecting cable.

It is advantageous if the drum sleeve surrounds an electrical connection element which can be connected at one end to a wire of the electric cable and at the other end to a coaxially aligned with the axis of rotation pin. A protective conductor of the connection cable can be connected to the contact pin. The contact pin can for example run within the trunnion. The support pin can be designed to be hollow.

In an advantageous embodiment, the connecting element is designed as a spiral spring. The coil spring may be connected on the one hand to the contact pin and on the other hand to a wire of the electric cable. The coil spring can be wound or unwound by twisting the cable drum be, without affecting the electrical connection between the one core of the electric cable and the centrally disposed contact pin is affected.

It is particularly advantageous if the winding device has a spring element which acts on the cable drum when unwinding the Elektrokabeis with a restoring force. This allows the electric cable to be wound up automatically. When unwinding the electric cable this can be deducted against the action of the spring element of the cable drum, wherein the cable drum is rotated.

The spring element is preferably designed as a scroll spring. This allows a particularly compact design he winding device.

It is advantageous if the roll spring is wound on a rotatably mounted on the support plate bobbin. The scroll spring can be fixed with a first end to the bobbin and with a second end to the cable drum. If the cable drum set in rotation, the scroll spring is unwound from the bobbin against the spring force of the scroll spring and wound on a spring position of the cable drum. If the cable drum is released again, then the scroll spring rolls automatically on the bobbin, wherein the cable drum is rotated and thereby the electric cable is wound.

In an advantageous embodiment, the support plate carries on its side facing away from the cable drum an end plate, wherein the spring element between the support plate and the end plate is arranged. Support plate and front plate define in such a configuration between them a spring chamber, which receives the spring element, in particular the scroll spring.

The invention also relates to a high-pressure cleaner with a housing which accommodates a motor pump unit with a fan and has inlet openings for sucking in cooling air and outlet openings for discharging the cooling air. In order to design the high-pressure cleaning device in such a way that a powerful motor pump unit can be used and that nevertheless an electric cable connected to the motor pump unit can be wound up in a simple manner, it is proposed according to the invention that the high-pressure cleaning device has a winding device of the above-described type, wherein the device within the Housing of the high pressure cleaning device is arranged.

As already explained, it is ensured in the case of the winding device according to the invention that the at least one slip ring and the at least one sliding contact are protected from spray water, and that waste heat occurring in the area of the cable drum can nevertheless be dissipated in a simple manner. This gives the possibility to arrange the winding device within the housing of the high-pressure cleaner. The high-pressure cleaner according to the invention is characterized by a compact design and the winding device is protected against mechanical damage. The free end of the electric cable to which a connector may be placed may be led out of the housing of the high-pressure cleaner through an opening, and inside the housing the electric cable may be stored by being wound on the cable drum. It is particularly advantageous if the winding device according to the invention is arranged in the flow path of the cooling air between the motor pump unit and the outlet openings. In particular, the winding region of the cable drum can be exposed to the cooling air in order to reliably dissipate any waste heat occurring.

It can be provided, for example, that the winding device is arranged laterally next to the high-pressure pump of the motor pump unit. Cooling air, which is supplied to the motor pump unit via the inlet openings of the housing, can first be guided along the electric motor of the motor pump unit, in particular it can be passed through a motor housing, and then the cooling air can be guided along the high-pressure pump, so that they on the arranged laterally next to the high-pressure pump winding device and can cool this. Subsequently, the cooling air can be led out of the housing via the outlet openings. In this case, it is in each case advantageous if outlet openings are arranged below the winding device.

The following description of preferred embodiments of the invention is used in conjunction with the drawings for further explanation. Show it:

FIG. 1 shows a sectional view of a high-pressure cleaning device according to the invention with a winding device according to the invention;

FIG. 2 shows a sectional view of a first embodiment of the winding device from FIG. 1; FIG. 3 shows a partially separated front view of the winding device from FIG. 1;

FIG. 4 shows a rear view of the winding device from FIG. 1;

Figure 5: an enlarged view of detail A of Figure 2 and

Figure 6: an enlarged view corresponding to Figure 5 of a second embodiment of a winding device according to the invention.

FIG. 1 schematically shows a high-pressure cleaning device 10 according to the invention with a housing 11 which surrounds a motor pump unit 12 with an electric motor 13 and a high-pressure pump 14. The high-pressure pump 14 can be supplied in a customary manner via a suction inlet cleaning liquid, preferably water, which can be pressurized by the high-pressure pump and discharged via a pressure outlet 16. This makes it possible to direct the pressurized cleaning liquid to a surface to clean it.

In order to connect the electric motor 13 with a voltage wave, for example a socket, the high-pressure cleaning device 10 comprises an electric cable 18 which can be wound onto a cable drum 20 of a winding device 19 arranged inside the housing 11 according to the invention.

The housing 11 has, adjacent to the electric motor 13, a multiplicity of inlet openings 22, via which cooling air is introduced into the interior of the housing 11. can flow. In addition, the housing 11 has outlet openings 23, which are arranged below the cable drum 20.

The motor pump unit 12 has a known per se and therefore not shown in the drawing fan, so that via the inlet openings 22 cooling air can be sucked into the housing interior. The cooling air is then passed through a motor housing 25 of the electric motor 13 and then flows along the high pressure pump 14 along. In this case, it encounters the winding device 19, in particular the cable drum 20, so that waste heat occurring in the region of the cable drum can be reliably dissipated. Via the outlet openings 23, the cooling air is then led out of the housing 11. In Figure 1, the flow direction of the cooling air is illustrated by the arrows 26.

The winding device 19 is shown schematically in Figures 2 to 5. In addition to the cable drum 20, it comprises a support body 30 with a support pin 32 and a support plate 34. The cable drum 20 is rotatably mounted about a rotation axis 36 on the support pin 32. It comprises a first drum disk 38 and a second drum disk 39, which are integrally connected to one another via a coaxially aligned with the axis of rotation 36 drum sleeve 40. The drum sleeve 40 surrounds a bearing sleeve 41, which bears against the support pin 32, and is surrounded by an outer sleeve 44. The latter is integrally connected to the two drum discs 38, 39. Between the outer sleeve 44 and the bearing sleeve 41 extend radially aligned webs 48th

The two drum discs 38, 39 define between them a winding region 42, which is freely accessible radially on the outside and is bounded radially on the inside by the outer sleeve 44. Between the drum sleeve 40 and the gerhülse 41 an inner annular space 43 is arranged, which receives an end portion of the electric cable 18 which can be wound in the winding region 42. Between the outer sleeve 44 and the drum sleeve 40 extends an outer annular space 45,

The support pin 32 protrudes on the side facing away from the winding region 42 outside of the first drum disk 38 on this. A central region 46 of the support plate 34 aligned parallel to the first drum disk 32 adjoins the support pin 32 in the radial direction. The central region 46 is surrounded on the outside by a first annular wall 47, which is aligned concentrically with the axis of rotation 36 and projects away from the central region 46 in the direction away from the first drum disk 38.

At a radial distance from the first annular wall 47, the support plate 34 has a coaxially with the first annular wall 47 aligned annular collar 49, which faces the first drum plate 38. The support plate 34 also has in the area outside the annular collar 49 on a pivot pin 51 on which a bobbin 52 is rotatably mounted about a parallel to the axis of rotation 36 aligned coil axis 53.

The first annular wall 47 is positively surrounded by a second annular wall 55, which is integrally formed on the first drum disc 38. At a radial distance from the second annular wall 55, the first drum disk 38, on its outer side facing away from the winding region 42, carries an annular groove 56 concentrically aligned with the second annular wall 55 into which the free end of the annular collar 49 dips. The annular groove 56 and the annular collar 49 form a first labyrinth seal, which has a contact space 58 between the central region 46 of the support plate 34 and the first drum disc 38 in the circumferential direction surrounds. A second labyrinth seal is formed by the first annular wall 47 and the second annular wall 52, which also surround the contact space 58 in the circumferential direction.

The contact space 58 receives two concentric to the axis of rotation 36 aligned slip rings 61, 62, and the slip rings 61, 62 contacting sliding contacts 63, 64, 65, 66. The slip rings 61 and 62 are fixed to the outside of the first drum disc 38 and the sliding contacts 63rd , 64, 65 66 are held on the side of the central area 46 of the support plate 34 facing the first drum disk 38. The sliding contacts 63, 64 slide on rotation of the cable drum 20 along the slip ring 61 along and the sliding contacts 65, 66 slide upon rotation of the cable drum 20 along the slip ring 62 along. To the slip rings 61, 62 each one not shown in the drawing wire of the electric cable 18 is connected. The corresponding wires are thereby passed through the inner annular space 43 and (not shown) by means of Zugentlastungen in the inner annular space 43 set. The connection of the wires with the slip rings 61 and 62 takes place in such a way that the first drum disc 38 has two passage openings, not shown in the drawing, via which the contact space 58 is connected to the inner annular space 43. The passage openings are each penetrated by a contact lug which is connected to a slip ring 61 or 62 and which dips into the inner annular space 43. Within the inner annular space 43, a plug is plugged onto the respective contact lug, which connects a wire of the electric cable 18 with the contact lug. The passage openings are sealed by means of a cable sleeve (heat shrink tubing) which protects the plug, the end piece of the respective core of the electric cable 18 adjoining the plug, and a connecting piece which delimits the respective passage opening in the circumferential direction first drum disc 38 protrudes into the inner annular space 43, surrounds. The splash-proof connection between inner annular space 43 and contact space 58 ensures that the sliding contacts 61, 62 can be connected in a simple manner to the wires of the electric cable 18 without the risk that spray water can penetrate into the contact space via the inner annular space 43 ,

The support plate 34 is covered on its side facing away from the cable drum 20 by a front plate 68, and between the end plate 68 and the support plate 34, a connecting cable 70 is passed, which is connected to the electric motor 13. A first wire 71 of the connection cable 70 is connected to a contact pin 72, which is passed through the support pin 32 and aligned coaxially with the axis of rotation 36. Two further, not shown in the drawing wires of the connection cable 70 are connected to the sliding contacts 63, 64 and 65, 66 in electrical connection. For this purpose, a corresponding splash-proof connection is used, as is also provided between the inner annular space 43 and the contact space 58 for connecting the wires of the electric cable 18 to the slip rings 61, 62. For this purpose, the central region 46 of the support plate 34 has two passage openings, not shown in the drawing, which are each penetrated by a contact lug connected to the sliding contacts 63, 64 and 65, 66, respectively. On the tabs in each case a plug is plugged, which is connected to a wire of the connecting cable 70, and the through holes are each sealed by means of a the end region of the wire, the Stekker and the passage opening bounding nozzle grommet (shrink tubing) splash-proof. The respective nozzle (not shown) projects from the central region 46 in the direction of the end plate 68. On its side facing away from the support plate 34, the support pin 32 carries a back plate 74 which comprises a cup-shaped inner part 75 and an annular outer part 76 surrounding the inner part 75 in the circumferential direction. The inner part 75 receives the free end of the support pin 32, and the outer part 76 is surrounded by the second drum plate 39, which has a rear plate 74 receiving the central opening 77.

The bearing sleeve 41 rests against the end face of the cup-shaped inner part 75, and in this bearing region an intermediate wall 79 aligned parallel to the outer part 76 is arranged, which extends in the radial direction as far as the drum sleeve 40.

Between the intermediate wall 79 and the outer part 76, an electrical connecting element in the form of a coil spring 81 is arranged, which is connected radially inwardly via a not shown in the drawing connecting part with the contact pin 72, and at the outer end of a wire of the electric cable 18 is connected. The coil spring 81 thus produces, in combination with the contact pin 72, an electrically conductive connection between a wire of the electric cable 18 and the first wire 71 of the connection cable 70. Two further wires of the electric cable 18 are connected via the slip rings 61, 62 and their associated sliding contacts 63, 64 and 65, 66 each with a further strand of the connecting cable 70. When winding and unwinding the electric cable 18, the cable drum 20 can thus be rotated about the axis of rotation 36, without the electrical connection between the electric cable 18 and the connecting cable 70 being impaired. For automatic winding of the electric cable 18, the winding device 19 comprises a spring element in the form of a scroll spring 83 which is wound onto the bobbin 52. One end of the scroll spring 83 is fixed to the bobbin 2, and the other end of the scroll spring 83 is fixed radially on the outside of the second annular wall 55 of the cable drum 20. If the cable drum 20 is rotated about the axis of rotation 36 for unwinding the electric cable 18 in a first rotational direction about the axis of rotation 36, the scroll spring 83 is unwound from the bobbin 52 against a spring force exerted by it and wound onto the second annular wall 55. Of the scroll spring 83 thus an elastic restoring force is exerted on the cable drum 20, so that it can be set for winding the electric cable 18 by means of the scroll spring 83 against the first direction of rotation.

The second drum disk 39 has a plurality of cooling air openings 85. The outer sleeve 44 has cooling air openings 86. This makes it possible to supply the winding region 42 with cooling air in the radial direction, which can then be led out of the winding region 42 in the axial direction via the cooling air openings 85. In addition, cooling air can enter from the winding region 42 in the radial direction via the cooling air openings 86 into the outer annular space 45 and be discharged therefrom in the axial direction via the cooling air openings 85. Thus, waste heat occurring within the cable drum 20 can be reliably released to the outside.

Despite the good accessibility of the cable drum 20 for cooling air there is no risk that the sliding contacts 63, 64, 65, 66 and / or the slip rings 61, 62 are affected by splashing. For this purpose, in the embodiment illustrated in FIGS. 2 to 5, the labyrinth seals come in Shape of the annular collar 49 and the associated annular groove 56 and in the form of the first and second annular walls 47, 55 are used.

FIG. 6 schematically shows a second embodiment of a winding device, which is designated as a whole by the reference numeral 89. This is largely identical to the previously described winding device 19. For identical components, therefore, the same reference numerals are used in Figure 6 as in Figures 2 to 5 and with respect to these components reference is made to avoid repetition of the above explanations.

The winding device 89 differs from the winding device 19 in that a second annular wall 91 is used, which is arranged at a radial distance from the first annular wall 47. The rotation axis 36 facing the inside of the second annular wall 91 forms a sealing surface 92 and the axis of rotation 36 remote from the outside of the first annular wall 47 forms a holding surface 95 from. Between the second annular wall 91 and the first annular wall 47, an elastomeric sealing ring 93 is arranged, which has a sealing lip 94. The sealing ring 93 is fixed to the holding surface 95, and the free end of the sealing lip 94 slides upon rotation of the cable drum 20 about the axis of rotation 36 on the sealing surface 92 along. The sealing ring 93 thus forms, in combination with the sealing surface 92, a sealing device which protects the contact space 58 of the winding device 89 from splash water. In addition, in the Wϊckelvorrichtung 89 a labyrinth seal is used in the form of the annular collar 49 and the associated annular groove 56, which also protect the contact space 58 of the winding device 89 from splashing.

Claims

PATENT APPLICATIONS

1. A device for winding an electric cable with a cable drum on which the electric cable is wound, and with a support body, wherein the support body has a support plate from which projects a support pin on which the cable drum is rotatably mounted about a rotation axis, and wherein between the support plate and the cable drum at least one slip ring and at least one contact sliding contact are arranged, which are rotatable relative to each other about the axis of rotation and which are electrically connected to the electric cable or a connecting cable, characterized in that the support plate (34) and the cable drum (20) define therebetween a contact space (58) which receives the at least one slip ring (61, 62 and the at least one sliding contact (63, 63, 63, 66) and which is secured by means of sealing means (47, 52; 49, 56 ; 93, 93) is sealed splash-tight.

2. Apparatus according to claim 1, characterized in that the sealing device has a labyrinth seal (49, 56, 47, 52).

3. A device according to claim 2, characterized in that the labyrinth seal at least two annular, concentric with the axis of rotation (36) arranged and intermeshing sealing members (49, 56), wherein a first sealing member (56) to the cable drum (20) and a second sealing member (49) to the support plate (34) is integrally formed.

4. Apparatus according to claim 3, characterized in that one of the two sealing members (56) is designed as an annular groove and the other sealing member as in the annular groove (56) dipping ring collar (49).

5. Apparatus according to claim 4, characterized in that the annular collar (49) and the annular groove (56) are aligned coaxially to the axis of rotation (36).

6. Device according to one of claims 2 to 5, characterized in that the labyrinth seal comprises at least one concentric with the axis of rotation (36) aligned first annular wall (47) which is surrounded by a second annular wall (55) form fit.

7. Apparatus according to claim 6, characterized in that the first annular wall (47) on the support plate (34) and the second annular wall (55) is integrally formed on the cable drum (20).

8. Device according to one of the preceding claims, characterized in that the sealing device has at least one elastomeric sealing ring (93) which is splash-tight against a sealing surface (92), wherein the sealing ring (93) and the sealing surface (92) relative to each other about the axis of rotation (36) of the cable drum (20) are rotatable.

9. Apparatus according to claim 8, characterized in that the sealing ring (93) in the radial direction between the sealing surface (92) and a holding surface is clamped.

10. The device according to claim 8 or 9, characterized in that the sealing ring (93) has a Dichtiippe (94) which bears slidably on the sealing surface (92)

11. The device according to claim 8, 9 or 10, characterized in that the sealing surface (92) on the cable drum (20) is arranged, and that the sealing ring (93) on the support plate (34) is held.

12. Device according to one of the preceding claims, characterized in that the cable drum (20) has a first and a second drum disc (38, 39) which are connected via a coaxial with the axis of rotation (36) aligned drum sleeve (49) and the between them define a winding region (42) for receiving the Elektroka- lever (18), wherein the contact space (58) on the winding region (42) facing away from the outer side of the first drum disc (38) is arranged.

13. The apparatus according to claim 12, characterized in that at least one drum disc (39) cooling air openings (85).

14. The apparatus of claim 12 or 13, characterized in that the drum sleeve (40) surrounds a bearing sleeve (41) which is rotatably mounted on the support pin (32) and connected to at least one drum disc (38), wherein between the drum sleeve (40 ) and the bearing sleeve (41) an annular space (43) is arranged, which receives an end portion of the electric cable (18).

15. The apparatus of claim 12, 13 or 14, characterized in that the drum sleeve (40) surrounds an electrical connection element (81) having one end to a wire of the electric cable (18) and with the other end to a coaxial with the axis of rotation (36) arranged contact pin (72) is connectable.

16. The apparatus according to claim 15, characterized in that the connecting element is designed as a spiral spring (81).

17. Device according to one of the preceding claims, characterized in that the device (19; 89) has a spring element (83) which acts on the cable drum (20) during unwinding of the electric cable (18) with a restoring force.

18. The apparatus according to claim 17, characterized in that the spring element is designed as a scroll spring (83).

19. The apparatus according to claim 18, characterized in that the scroll spring (83) is wound on a rotatably mounted on the Tragpiatte (34) bobbin (52).

20. The apparatus of claim 17, 18 or 19, characterized in that the support plate (34) on the cable drum (20) facing away from an end plate (68) carries, wherein the spring element (83) between the support plate (34) and the Face plate (68) is arranged.

21. High-pressure cleaning device comprising a housing (11) which accommodates a motor pump unit (12) with a fan and inlet openings (22) for sucking in cooling air and outlet openings (23) for discharging the cooling air, and with a device (19; one of the preceding claims for winding an electrical cable (18) connected to the motor pump unit (12), the device (19; 89) being disposed within the housing (11).

22. High-pressure cleaning device according to claim 21, characterized in that the device (19; 89) is arranged in the flow path of the cooling air between the motor pump unit (12) and the outlet openings (23).

23. High-pressure cleaning device according to claim 22, characterized in that the device (19; 89) is arranged laterally next to the high-pressure pump (14) of the motor pump unit (12).