Transmission device for transmitting electrical current to a rotor of an electrical machine

Abstract

A transmission device for transmitting electrical current to a rotor of an electrical machine, comprising two contact carriers (2, 3), each carrying electrical sliding contacts (4, 5), and comprising at least one base carrier (1) arranged between the contact carriers (2, 3), against which the contact carriers (2, 3) bear at least in sections and which supports them, characterized in that, for cooling at least one contact carrier (2, 3), at least one cooling structure (11, 12) which is open on one side and through which coolant can flow is provided on the surface (9, 10) of the base carrier (1), wherein, for sealing on the open side (19, 20) of the cooling structure (11, 12) with respect to the abutting contact carrier (2, 3), sealing material (37-40, 43-46, 51, 52) is arranged at least in sections and is materially connected to the cooling structure (11, 12) and / or to the contact carrier (2, 3).The invention further relates to a method for producing a seal of a cooling structure (11, 12) open on one side through which coolant can flow in such a transmission device.

Description

[0001] The invention relates to a transmission device for transmitting electrical current to a rotor of an electrical machine and to a method for producing a seal for a cooling structure open on one side through which coolant can flow in such a transmission device according to the type defined in more detail in the preamble of claim 1 or 8.

[0002] DE 10 2019 100 729 B4 discloses a brush module for a slip ring system of a current-excited electric machine for a motor vehicle for supplying current to a rotor of the electric machine. A heat-conducting core enclosed in a holding device for holding the brush holder is provided for heat dissipation from the brush module.

[0003] The invention is therefore based on the object of proposing a transmission device and a method of the aforementioned type which, in a structurally simple manner, ensure reliable cooling of the electrical sliding contacts for power transmission to an electrical machine.

[0004] The problem is solved by the features of claim 1 and alternatively by the features of claim 8. Further advantageous and claimed embodiments emerge from the respective subclaims, the description, and the drawings.

[0005] Thus, a transmission device for transmitting electrical current to a rotor of an electrical machine is proposed. The transmission device comprises two contact carriers, each carrying electrical sliding contacts, and at least one base carrier arranged between the contact carriers, against which the contact carriers rest at least partially and which supports them. For cooling at least one contact carrier, at least one cooling structure open on one side through which coolant can flow is provided on the surface of the base carrier. For sealing on the open side of the cooling structure, at least in sections, an additional sealant is arranged, bonded to the cooling structure and the contact carrier, adjacent to the contact carrier. It is also conceivable that, for sealing purposes, at least in sections, an additional sealant is arranged, bonded to the cooling structure or to the contact carrier.

[0006] The integral connection with the additional sealant ensures a secure seal between the open side of the cooling structure and the adjacent contact carrier. The seal can be easily created on both the cooling structure and the contact carrier. Localized coolant leaks and operational malfunctions are thus reliably avoided. The secure sealing of the cooling structure enables active cooling of the contact carrier and sliding contacts with high cooling performance. Furthermore, a constant flow of coolant is ensured, which also makes it suitable for defined lubrication and cooling, particularly of metallic sliding contacts on the rotor.

[0007] In a particularly preferred embodiment of the invention, the sealant consists of an elastic and simultaneously adhesive material. This elastic effect enables a particularly high level of sealing and, in particular, easy compensation of component tolerances on the base support and a contact support adjacent to it, which allows the base support with the cooling structure to be manufactured easily and cost-effectively, for example, by injection molding. The adhesive effect ensures a highly sealed connection between the cooling structure and the adjacent contact support.

[0008] A particularly simple production of the seal is made possible if the sealant is preferably sprayed on or glued on with a removable carrier film.

[0009] The sealant can be, for example, elastomer or another rubber-like compound.

[0010] In another particularly preferred embodiment of the invention, the sealant forms a double-sided, elastic sealing layer. This elastic sealing layer compensates for, in particular, unevenness and component tolerances, and provides a reinforced sealing effect on the cooling structure and, at the same time, on the contact carrier adjacent to it.

[0011] In a further particularly preferred embodiment of the invention, the cooling structure is formed by two ribs projecting from the surface of the base support, which ribs delimit a circumferential coolant channel open on one side, wherein the contact support rests against the open side to seal the latter and the sealant forms a double-sided adhesive elastic sealing strip, which is adhesively connected on the one hand to the ribs and on the other hand to the adjacent contact support.

[0012] In a further development of the invention, the cooling structure is formed by two ribs protruding from the surface of the base support, which define a circumferential coolant channel open on one side. The contact support rests against this channel to seal the open side, and the sealant forms a double-sided, elastic sealing layer that is adhesively bonded, on the one hand, entirely or partially to the inside of the contact support and, on the other hand, to the ribs. In this way, the sealant can be applied, in particular, over a large area on the adjacent inside of the contact support.

[0013] Preferably, the area on the adjacent contact carrier corresponding to the coolant channel is kept free of sealant. This enables heat transfer in the sealant-free area through direct contact between the contact carrier and the coolant guided in the coolant channels on the base carrier.

[0014] In a further particularly preferred embodiment of the invention, two cooling structures are provided on the base support for cooling both contact carriers. Preferably, a cooling structure open on one side through which coolant can flow is provided on the surface of the base support, wherein, for sealing on the respective open side of the cooling structure to the respective adjacent contact carrier, sealant is arranged at least in sections with the cooling structures or with the contact carriers in a materially bonded manner. It is also conceivable to arrange sealant at least in sections with the cooling structures or with the contact carriers in a materially bonded manner for sealing.

[0015] The object of the invention is also achieved by a method for producing a seal for a cooling structure, open on one side and through which coolant can flow, in a transmission device as described above. It is provided that, to seal the open side of the cooling structure against an adjacent contact carrier of the transmission device, sealant is sprayed onto at least some sections of the cooling structure or the contact carrier. It is also conceivable that sealant is sprayed onto at least some sections of both the cooling structure and the contact carrier. This results in the advantages already described above.

[0016] Alternatively, to seal the open side of the cooling structure against an adjacent contact carrier of the transmission device, sealant is bonded to a carrier film at least in sections on the cooling structure or the contact carrier, and this carrier is then peeled off the sealant. It is also conceivable to bond sealant to a carrier film at least in sections on both the cooling structure and the contact carrier, and then peel this film off the sealant. This results in the advantages already described above.

[0017] Before bonding, the sealant is preferably applied to the carrier film as a double-sided adhesive contour.

[0018] In a preferred variant of the proposed method, the sealant is sprayed onto the open side of the cooling structure as a sealing tape and the contact carrier is placed on the sealing tape for sealing.

[0019] A further variant of the proposed method provides that the sealant is glued to the contact carrier as a sealing tape or as a sealing layer with a carrier film, which is then removed from the sealant and the contact carrier with the sealing tape or the sealing layer is applied to the open side of the cooling structure for sealing.

[0020] Further claimed features of the invention will become apparent from the following description and the drawings, which further explain the present invention. They show: Fig. 1 a perspective side view of a transmission device according to the invention for transmitting electrical current to a rotor of an electrical machine, Fig. 2 and Fig. 3 a perspective side view of the front and rear of the transmission device with cooling structures indicated by concealed body edges on the base support in a first embodiment, Fig. 4 and Fig. 5 a perspective side view of the front and rear of the base support of the transmission device from Fig. 2 and Fig. 3, Fig. 6 an enlarged section of Fig. 4 and Fig. 5, Fig. 7 a perspective view of the transmission device in a second embodiment, Fig. 8 an enlarged section of Fig. 7, Fig. 9 a perspective side view of a contact carrier of the transmission device from Fig. 7, Fig. 10 and Fig. 11 a single view of a removable carrier film with the sealant for application to the contact carrier in Fig. 9, Fig. 12 a perspective view of the transmission device in a third embodiment, Fig. 13 an enlarged section of Fig. 12, Fig. 14 and Fig. 15 a detailed view of a contact carrier of the transmission device from Fig. 12 without sliding contacts, Fig. 16 an enlarged section of Fig. 15, Fig. 17 and Fig. 18 a single view of a removable carrier film with the sealant for application to the contact carrier in Fig. 14 and Fig. 15.

[0021] The figures illustrate various views and embodiments of a transmission device for transmitting electrical current to a rotor of an electrical machine. These illustrations also illustrate the method according to the invention.

[0022] The Fig. The transmission device shown in Figures 1 to 3 comprises a one-piece base support 1 and two identical contact supports 2, 3, each carrying three electrical sliding contacts 4, 5 for transmitting electrical current to the rotor (not shown). The base support 1 is arranged coaxially between the contact supports 2, 3, supporting them and electrically insulating them. The base support 1 and the contact supports 2, 3 form a central through-opening 6 on the stationary transmission device for the axial passage of a shaft 56 of the electrical machine, which carries the rotor (not shown).

[0023] The base support 1 and the contact supports 2, 3 are each plate-shaped. The latter are preferably designed as circular contact plates and are fastened with their flat inner sides 7, 8 axially facing the base support 1 to opposite axial sides 9, 10 of the base support 1, for example via axial screw connections. The transmission device can be fastened to a stationary component, for example the stator housing of the electrical machine, via further axial screw connections 57. On the opposite axial outer sides of the contact supports 2, 3, three electrical sliding contacts 4, 5 are arranged, for example, evenly distributed over the circumference and fastened in holders 58, 59 on the contact supports 2, 3.

[0024] After Fig. 2 to 4, two identical cooling structures 11, 12 open on one side are formed on the axial sides 9, 10 of the base support 1 in one piece with the latter and projecting axially therefrom for cooling the contact supports 2, 3 and dissipating the heat generated at the electrical sliding contacts 4, 5 during operation.

[0025] The cooling structures 11, 12 are each formed by two ribs 13, 14 and 15, 16 projecting axially on the respective axial side 9, 10 of the base support 1. The ribs 13, 14 and 15, 16 are arranged opposite one another at a distance from one another, so that the ribs 13, 14 and 15, 16 define a coolant channel 17 and 18, respectively, circulating as a cooling circuit and open on one side between them on each side 9, 10 of the base support 1. On the respective open side 19, 20 of the cooling structures 11, 12, the ribs 13, 14 and 15, 16 each form an axial, flat sealing surface 21, 22 and 23, 24 on the front sides of their free ends, which sealing surface runs around the ribs 13, 14 and 15, 16, respectively. The sealing surfaces 21, 22 and 23, 24 are each arranged in a plane on the axial sides 9 and 10, respectively, so that a contact carrier 2 or 23, 24 is arranged on the sealing surfaces 21, 22 and 23, 24, respectively.3 each covers the respective coolant channel 17, 18 on the open side 19, 20 with its flat axial inner side 7, 8 (. Fig. 8, Fig. 13). The sealing surfaces 21, 22 and 23, 24 are spaced apart from each other by the coolant channels 17 and 18 arranged between them.

[0026] The cooling structures 11, 12, together with the coolant channels 17, 18, each form a cooling circuit with a plurality of cooling loops 25, 26 arranged one behind the other. The cooling loops 25, 26 run inwards towards one another on the axial sides 9, 10 of the base support 1, while the sections 27, 28 connecting them further outwards extend essentially in a ring shape.

[0027] The cooling loops 21, 22 are each arranged such that they run along the axial sides 9, 10 of the base support 1 for cooling the axial inner sides 7, 8 of the contact supports 2, 3 in the region of the sliding contacts 4, 5 mounted on the respective axial outer sides thereof. For cooling the three sliding contacts 4, 5 on the contact supports 2, 3, the coolant channels 17, 18 are each designed, for example, with three cooling loops 25, 26.

[0028] As a result, the heat generated on the outside of the respective contact carrier 2, 3 by the respective sliding contact 4, 5 can be dissipated directly on the respective inside 7, 8 of the respective contact carrier 2, 3 through the respective cooling loop 25, 26 on the base carrier 1. In this way, direct active cooling at the point of heat generation with high cooling performance is achieved.

[0029] For connection to the coolant supply of the base support 1, the coolant channels 17, 18 each have a coolant inlet opening 29, 30 and a coolant outlet opening 31, 32, each designed as an axial bore extending from the base of the coolant channels 13, 14. Oil from the cooling oil circuit of the electric machine is preferably used as the coolant.

[0030] In a first embodiment according to Fig. 2 to 6, additional sealant 37, 38 or 39, 40 is applied to the open axial side 19, 20 of the cooling structure 11, 12, to the sealing surfaces 21, 22 or 23, 24 of the ribs 13, 14 or 15, 16, respectively, for coolant-tight sealing. The sealant 37, 38 or 39, 40 consists of a double-sided adhesive material, for example, an elastomer. It forms a double-sided adhesive elastic sealing strip circumferentially around the sealing surfaces 21, 22 or 23, 24, limited to the ribs 13, 14 or 15, 16. These are adhesively connected both to the axial sealing surfaces 21, 22 and 23, 24 of the cooling structure 11, 12 on the base support 1 and to the axial inner sides 9, 10 of the respective adjacent contact supports 2, 3.

[0031] To create the seal, the sealant 37, 38 or 39, 40 is used as a sealing tape according to Fig. 4 to 6 are sprayed onto the sealing surfaces 21, 22 and 23, 24 of the ribs 13, 14 and 15, 16 of the cooling structure 11, 12 on the base support. Subsequently, the contact supports 2, 3 are applied with the sealing strips formed on the inner sides 7, 8 by the sealant 37, 38 and 39, 40 on the sealing surfaces 21, 22 and 23, 24, respectively.

[0032] Due to the double-sided adhesive effect of a sprayed-on sealing tape 37, 38 or 39, 40, an increased sealing effect due to adhesion can be achieved on the sealing surfaces 21, 22 or 23, 24 and at the same time on the contact carriers 2, 3 adjacent to them.

[0033] Due to the elastic effect of the sealant 37, 38, 39, 40, it is adaptable and flexible, whereby in particular unevenness and component tolerances between the base carrier 1 and the contact carriers 2, 3 which are axially adjacent to it in a so-called sandwich construction can be achieved.

[0034] The open area 41, 42 of the cooling structure 11, 12 located between the sealing surfaces 21, 22 and 23, 24 formed on the ribs 13, 14 and 15, 16, respectively, is covered by the respective adjacent contact carrier 2, 3, so that heat transfer is achieved in direct contact of the inner sides 7, 8 of the contact carriers 2, 3 with the coolant guided in the coolant channels 17, 18.

[0035] Fig. 7 to 9 show a second embodiment in which additional sealant 43, 44 or 45, 46 is applied in a material-to-material manner to the inner sides 7, 8 of the respective contact carrier 2, 3 as a double-sided adhesive elastic sealing layer. With this layer, the respective contact carrier 2 is applied to the sealing surfaces 21, 22 or 23, 24 of the cooling structure 11, 12 on the base carrier 1. In this way, the sealant 43, 44 forms two double-sided adhesive sealing strips on each axial inner side 9, 10 of the contact carrier 2, 3, corresponding to the respective sealing surfaces 21, 22 or 23, 24 on the base carrier 1 on the inner sides 7, 8 of the respective contact carrier 2, 3. These are adhesively bonded to the sealing surfaces 21, 22 and 23, 24 of the cooling structure 11, 12 on the base support 1, as well as to the axial inner surfaces 9, 10 of the respective adjacent contact supports 2, 3. For a further description of the sealing material 43, 44 and 45, 46, please refer to the explanations for the first embodiment.

[0036] The area 47, 48 free of sealant 43, 44 or 45, 46 serves for heat transfer in direct contact of the inner sides 7, 8 of the contact carriers 2, 3 with the coolant guided in the coolant channels 17, 18.

[0037] The area 47, 48 corresponding to the coolant channels 17, 18 and located between the sealing strips 43, 44 and 45, 46, respectively, is kept free of sealant 43, 44 and 45, 46 on the inner sides 7, 8 of the adjacent contact carriers 2, 3. The kept-free area 47, 48 on the inner sides 7, 8 of the contact carriers 2, 3 serves for heat transfer in direct contact with the coolant guided in the coolant channels 17, 18.

[0038] To produce the seal, the sealant 43, 44 or 45, 46 is initially applied as a sealing tape as a double-sided adhesive contour on a carrier film 49 according to Fig. 10 and Fig. 11. Using the carrier film 49, the sealant 43, 44 or 45, 46 is bonded as a sealing tape to the inner sides 7, 8 of the contact carriers 2, 3. The carrier film 49 is then peeled off the sealant 43, 44 or 45, 46, and the contact carriers 2, 3 are placed against the sealing surfaces 21, 22 or 23, 24, respectively, with the sealing tapes formed on the inner sides 7, 8 by the sealant 43, 44 or 45, 46.

[0039] In Fig. 12 to 16 show a third embodiment in which, as a variant of the second embodiment, sealant 51, 52 is applied in a material-to-material manner to the axial inner sides 7, 8 of the contact carriers 2, 3 as a double-sided adhesive elastic sealing layer. This is adhesively bonded on the one hand to the sealing surfaces 21, 22 and 23, 24 formed on the ribs 13, 14 and 15, 16, respectively, and on the other hand to the inner sides 7, 8 of the adjacent contact carriers 2, 3. The sealing layer 51, 52 extends along the entire inner sides 7, 8 of the contact carriers 2, 3 up to the recesses 53, 54 provided thereon due to their design ( Fig. 12 to 14).

[0040] In addition, the area 47, 48 corresponding to the coolant channels 17, 18 on the inner sides 7, 8 of the contact carrier 2, 3 in each case is kept free of sealant 51, 52 in order to again enable heat transfer in direct contact of the coolant guided in the coolant channels 17, 18 with the inner sides 7, 8 of the contact carrier 2, 3.

[0041] To produce the seal, the sealing layers formed by the sealant 51, 52 are first applied as a double-sided adhesive contour on a carrier film 55 according to Fig. 17 and Fig. 18. With the latter, it is bonded to the inner sides 7, 8 of the contact carriers 2, 3. Subsequently, the respective carrier foil 55 is removed from the sealant 51, 52. Subsequently, the contact carriers 2, 3, each with the respective sealing layer formed on the inner sides 7, 8 by the sealant 51, 52, are placed on the sealing surfaces 21, 22 or 23, 24 of the ribs 13, 14 or 15, 16 on the base carrier 1.

[0042] The electrical sliding contacts 4, 5 arranged in the holders 58, 59 on the outer sides of the contact carriers 2, 3 are preferably designed as electrically conductive so-called brushes ( Fig. 1 to 3), which establish electrical contact with the slip ring 50 arranged on the rotor shaft for supplying electrical power to the rotor. Pressure means 62 and 63, respectively, in particular spring means, preferably torsion springs, are provided on the outer sides of the contact carriers 2, 3 to press the sliding contacts 4 and 5 together.

[0043] For the lubrication and cooling of the electrical sliding contacts 4 and 5, in particular for contact with the respective slip ring 50, as shown in Fig. 7 to 9, 12, 14 and 15, spray openings 60, 61 are provided on the axial inner sides 7, 8 of the contact carriers 2, 3 radially on the inside at the edge of the central through-opening 6 in the area of ​​the respective sliding contact 4, 5. These each form the open end of a recess 64, 65 running radially on the respective inner side 7, 8 of the contact carriers 2, 3, which overlap with the coolant channels 17, 18 on the base carrier 1 or extend into them. The recesses 64, 65 are preferably designed as a bead on the respective inner side 7, 8 of the contact carriers 2, 3 with a preferably wedge-shaped cross-sectional profile, which is covered on the open axial side 19, 20 by the respective adjacent base carrier 1. At the spray openings 62 and 63, similar to a spray nozzle, spray oil from the coolant circuit can be distributed in a targeted and controlled manner onto the electrical sliding contacts 4 and 5, respectively, for lubrication and cooling of the contact to the respective slip ring 50.

[0044] Corresponding to the recesses or beads 64, 65 on the inner sides 7, 8 of the contact carriers 2, 3, in the first embodiment according to Fig. 4 to 6 each have an area 33 on the base support 1 kept free of sealant 37 or 39 on the respective sealing tape and in the third embodiment according to Fig. 12 to 18, an area 34 is provided on the respective contact carrier 2, 3 which is kept free of sealant 51 or 52 on the respective sealing layer.

[0045] In the second embodiment according to Fig. 7 to 9, in the area of ​​the recesses or beads 64, 65 on the inner sides 7, 8 of the contact carriers 2, 3, the sealant or sealing strip 43 or 45 is designed to be continuous on the respective sealing surface 21, 23 of the radially inner rib 13, 15. Such a continuous design of the sealant 51 or 52 on the sealing layers is also alternatively possible in the third embodiment according to Fig. 12 to 18 possible.

[0046] The contact carriers 2, 3 are Fig. 1 to 3, each of which is integrally formed with an electrical connection lug with electrical contacts, can be connected to an electrical supply (not shown), in particular to the electrical system of a vehicle. Accordingly, the contact carriers 2, 3 are current-carrying, so that the electrical sliding contacts 4, 5 can be electrically connected in a simple manner, preferably by means of a material bond, for example, by soldering or welding, via connecting strands 64 and 65 connected to the respective contact carriers 2, 3. List of reference symbols 1 base support 2 contact carriers 3 contact carriers 4 sliding contact 5 sliding contact 6 passage opening 7 Inside contact carrier 8 Inside contact carrier 9 Surface, side of the base support 10 Surface, side of the base support 11 Cooling structure 12 Cooling structure 13 rib 14 rib 15 ribs 16 ribs 17 Coolant channel 18 Coolant channel 19 open page 20 open pages 21 Sealing surface 22 Sealing surface 23 Sealing surface 24 Sealing surface 25 Cooling loop 26 Cooling loop 27 Section of the cooling structure / coolant channel 28 Section of the cooling structure / coolant channel 29 Coolant inlet opening 30 Coolant inlet opening 31 Coolant outlet opening 32 Coolant outlet opening 33 free area on the base support 34 free area on the contact carrier 37 Sealant, sealing layer, sealing tape 38 Sealant, sealing layer, sealing tape 39 Sealant, sealing layer, sealing tape 40 Sealant, sealing layer, sealing tape 41 open area 42 open area 43 Sealant, sealing layer, sealing tape 44 Sealant, sealing layer, sealing tape 45 Sealant, sealing layer, sealing tape 46 Sealant, sealing layer, sealing tape 47 free area on the contact carrier 48 free area on the contact carrier 49 Carrier film 50 slip ring 51 Sealant, sealing layer 52 Sealant, sealing layer 53 Recess on the contact carrier 54 Recess on the contact carrier 55 carrier film 56 Wave 57 Screw connection 58 bracket 59 Bracket 60 spray opening 61 Spray opening 62 Pressure element, torsion spring 63 Pressure element, torsion spring 64 recess, bead 65 recess, bead 66 connecting wires 67 connecting wire QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2019 100 729 B4

[0002]

Claims

[1] Transmission device for transmitting electrical current to a rotor of an electrical machine, with two contact carriers (2, 3), each carrying electrical sliding contacts (4, 5), and with at least one base carrier (1) arranged between the contact carriers (2, 3), against which the contact carriers (2, 3) rest at least in sections and which carries them, characterized by in that for cooling at least one contact carrier (2, 3) at least one cooling structure (11, 12) which is open on one side and through which coolant can flow is provided on the surface (9, 10) of the base carrier (1), wherein for sealing on the open side (19, 20) of the cooling structure (11, 12) to the adjacent contact carrier (2, 3), sealing material (37-40, 43-46, 51, 52) is arranged at least in sections and is materially connected to the cooling structure (11, 12) and / or to the contact carrier (2, 3). [2] Transmission device according to claim 1, characterized bythat the sealant (37-40, 43-46, 51, 52) consists of elastic and at the same time adhesive material. [3] Transmission device according to one of claims 1 or 2, characterized by that the sealant (37-40, 43-46, 51, 52) forms a double-sided adhesive elastic sealing layer. [4] Transmission device according to one of claims 1 to 3, characterized by in that the cooling structure (11, 12) is formed by two ribs (13, 14, 15, 16) projecting from the surface (9, 10) of the base support (1), which ribs delimit a circumferential coolant channel (17, 18) open on one side, wherein the contact support (2, 3) bears against the open side (19, 20) to seal it, and the sealing material (37, 38, 39, 40) forms a double-sided adhesive elastic sealing strip which is adhesively connected on the one hand to the ribs (13, 14, 15, 16) and on the other hand to the adjacent contact support (2, 3). [5] Transmission device according to one of claims 1 to 4, characterized byin that the cooling structure (11, 12) is formed by two ribs (13, 14, 15, 16) projecting from the surface (9, 10) of the base support (1), which ribs delimit a circumferential coolant channel (17, 18) open on one side, wherein the contact support (2, 3) bears against the open side (19, 20) to seal it, and the sealant (51, 52) forms a double-sided adhesive elastic sealing layer which is adhesively connected, on the one hand, wholly or partially, to the inside (7, 8) of the adjacent contact support (2, 3) and, on the other hand, to the ribs (13, 14, 15, 16). [6] Transmission device according to one of claims 1 to 5, characterized by that the cooling structure (11, 12) delimits a coolant channel (17, 18) which is open on one side, wherein the area (47, 48) on the adjacent contact carrier (2, 3) corresponding to the coolant channel (17, 18) is kept free of sealing material (37-40, 43-46, 51, 52). [7] Transmission device according to one of claims 1 to 6, characterized byin that, for cooling both contact carriers (2, 3), two cooling structures (11, 12) which are open on one side and through which coolant can flow are provided on the surface (9, 10) of the base carrier (1), wherein, for sealing on the respectively open side (19, 20) of the cooling structures (11, 12) to the respectively adjacent contact carrier (2, 3), sealing material (37-40, 43-46, 51, 52) is arranged at least in sections and is materially connected to the cooling structure (11, 12) and / or to the contact carrier (2, 3). [8] Method for producing a seal of a cooling structure (11, 12) which is open on one side and through which coolant can flow in a transmission device according to one of the preceding claims, wherein, for sealing on the open side (19, 20) of the cooling structure (11, 12) to an adjacent contact carrier (2, 3) of the transmission device, at least in sections on the cooling structure (11, 12) and / or on the contact carrier (2, 3) sealant (37-40, 43-46, 51, 52) is sprayed onto or adhered to a carrier film (49, 55) and this is then peeled off from the sealant (37-40, 43-46, 51, 52). [9] Method according to claim 8, characterized by that the sealant (37, 38, 39, 40) is sprayed onto the open side (19, 20) of the cooling structure (11, 12) as a sealing tape and the contact carrier (2, 3) is placed on the sealing tape for sealing. [10] Method according to one of claims 8 or 9, characterized bythat the sealant (43-46, 51, 52) is glued as a sealing tape or as a sealing layer to the contact carrier (2, 3) with a carrier film (49, 55) and this is then removed from the sealant (43-46, 51, 52) and the contact carrier (2, 3) is applied with the sealing tape or with the sealing layer for sealing on the open side (19, 20) of the cooling structure (11, 12).

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