MXPA06008897A - Gear motor in particular for motor vehicle wiper mechanism - Google Patents

Abstract

The invention concerns a gear motor (1) in particular for a motor vehicle wiper mechanism, comprising a support housing (2) whereon are mounted an electric motor (3) connected to a reduction gear, a closure housing (5) covering the support housing (2), and connection means electrically connecting among them the different electrical components of the gear motor (1). The invention is characterized in that the connecting means comprise at least one strip conductor which is overmoulded inside the closure housing (5), and which is provided with at least one indentation adapted to co-operate by close-fit with a connection plug of one of the electrical components of the gear motor, the strip conductor portions delimiting longitudinally each indentation being respectively adapted to exert a contact pressure by elastic deformation on each surface of the associated connection plug.

Description

PARTICULAR GEAR ENGINE FOR MOTOR VEHICLE WIPER CLEANING MECHANISM DESCRIPTIVE MEMORY The present invention relates to a motor unit and gearbox, that is to say, to a device made essentially of an electric motor, which is coupled to a gearbox that serves to reduce the speed of said motor. The present invention can be applied particularly advantageously although not exclusively to the field of windshield wiper mechanisms for motor vehicles. The motor and gearbox units have a variety of electrical components. In addition to the essential electric motor and the power supply connector, said motor unit and gearbox also typically includes an electronic card that allows to operate the operation of the motor unit and gearbox accurately, one or more positions and / or speed sensors, etc. It should be noted that, through this text, the concept of "electrical component" refers both to electrical devices in the strict sense of the term, as well as to electronic devices that are only considered to be systems that are technically more advanced.

In any case, it is known that the various electrical components of a motor unit and gearbox can be electrically interconnected by welding lead wires and / or conductive tracks between their respective connection terminals. However, that solution currently and gradually tends to disappear today, essentially because it is not ecological because it uses heavy metals that are particularly harmful to the environment. In order to remedy this difficulty, it is currently common to use connection boxes, which can generally be removed and in which the conductor tracks are connected together, the ends of these tracks are suitable to be assembled reversibly to the terminals connection of the various electrical components of the motor unit and gearbox. Unfortunately, this type of connection group suffers from the disadvantage of having a high cost because it requires, above all, the presence of an additional part that is also relatively voluminous, particularly, the connection box. This also requires complex shaped tracks and / or special connectors in the connection zones between the conductive tracks and the connection terminals, in order to have the capacity to achieve the function of reversible coupling inherent to the removable feature of the box. Therefore, when the ends of the conductor tracks are in the form of plugs, the use of bulky and expensive plugs becomes mandatory. On the other hand, when the terminal connection of the electrical components is that which is constituted by plugs, the ends of the conductor tracks are generally bent in lyre forms, which requires numerous bending operations and / or cutting operations, which are always complicated to implement. Accordingly, the technical problem to be solved by the present invention is to propose a motor unit and gearbox in particular for a windscreen wiper mechanism of a motor vehicle, wherein said motor unit and gearbox comprises a support cover, on which is mounted an electric motor coupled to a gearbox, a cover cover that covers the support cover and connection means that electrically interconnect the various electrical components of the motor unit and gearbox, whose unit of motor and gearbox allows to avoid the problems of the state of the matter by offering a connection set that is significantly less expensive, while also having a good connection quality. The solution to the technical problem exposed, acing to the present invention in which the connecting means comprise at least one conductive track, which is molded inside the closing cover and which are provided with at least one notch suitable for cooperating by interacting with a power socket. connection of one of the electrical components of the motor unit and the gearbox, the track portions define longitudinally each notch, being suitable to exert contact pressure by elastic deformation on the respective faces of the associated connecting plug. The present invention, as defined, offers the advantage of proposing connection means which, from a structural point of view, are considerably simpler than their counterparts of the state of matter, and therefore, are considerably less expensive to implement. The molded conductive tracks inside the closure cover allow omitting the additional part constituted by the connection box. They also make it possible to adopt conductive track profiles which are relatively linear, and therefore, are easy to manufacture and integrate. Naturally, all this assumes that the closure cover is made of an electrically insulating material, for example, of plastic. The principle of interaction used to connect each connecting plug and the conductive track that is associated with it does not require a special connector, or any complex bending or cutting operations. This additionally contributes to reducing the cost of the connection means. The molding also makes it possible to achieve a much greater precision in the relative positioning of the conductor tracks in relation to the connection plugs of the various electrical components of the motor unit and gearbox, to achieve the benefit of a connection quality improved The precision inherent in the principle of interaction used to implement the connections also participates in obtaining significantly improved rigor during the assembly of the conductor tracks and connection plugs. It should be noted that, in addition to making the conductor tracks particularly easy to mold, the simplicity of shape of said conductor tracks also makes it possible, particularly advantageously, not to complicate or prevent demolding of the closure cover once the conductor tracks have been integrated into the molding. The present invention also provides the features that are evident from the following description and that should be considered in isolation or in any technically possible combination. The present description, given by way of non-limiting example, imparts a clearer understanding of how the present invention can be implemented, the present description being made with the accompanying drawings as a reference, in which: Figure 1 is a view in perspective of a motor unit and gearbox of the present invention; Figure 2 shows the motor unit and gearbox without its closing cover; Figure 3 is a bottom view of the closing cover of the motor unit and gearbox; Figure 4 is a view similar to the view of Figure 2, but also shows the electronic card of the motor unit and gearbox; Figure 5 shows in detail that portion of the motor unit and gearbox in which the connection plugs of the electric motor are located; Figure 6 is a perspective view of an insert designed to constitute the conductive tracks that serve to electrically interconnect the electronic card and the electric motor; Figure 7 is a perspective view of an insert designed to constitute the conductive tracks that serve to electrically connect the electrical connector and the electronic card; Figure 8 shows the contact areas between the electrical motor connection plugs and their power supply conductive tracks; Figure 9 shows in detail that portion of the closing cover, which supports the ends of the conductive tracks that serve to energize the electric motor; and Figure 10 shows the relative placement of the electrical motor connection plugs in relation to that portion of the closure cover, which is shown in Figure 7.

For reasons of clarity, similar elements are designated by similar references. Likewise, only those elements that are essential for the understanding of the present invention are shown without being drawn to scale and in diagram form. Figure 1 shows a motor unit and gearbox 1, which is designed to equip a windscreen wiper device of a motor vehicle. Because this type of application is well known, the operation of this is not described in more detail later. From a purely structural point of view, the motor unit and gearbox 1, conventionally has a support cover 2 on which an electric motor 3 is mounted, coupled to a gearbox 4 which serves to reduce the speed of said motor. The support cover 2 is covered by a closure cover 5 to which it is secured by means of a plurality of assembly screws 6. Although it also serves as an anchor base for anchoring the electric motor 3, the support cover 2 is above all, designed to support all the internal components of the gearbox 4, as can be seen in Figure 2. It is possible to observe, in particular, the presence of a worm 7, which is suitable for being screwed into axial rotation directly by the electric motor 3, and the presence of a sprocket 8 that is secured to an axis that is substantially perpendicular to the axis of rotation of the worm 7. The complete assembly is arranged in such a way that the worm 7 cooperates with the gear wheel 8, in such a way that the output shaft 9 has the ability to be driven indirectly in axial rotation by the electric motor 3. In addition to act As a protective element, the locking bracket 5 shown in Figure 3 also serves as a support for securing the motor unit and gearbox 1 to the bodywork of the motor vehicle. To this end, two spaces 10, 11, are provided in two different tongues 12, 13, in order to receive conventional clamping dampers (not shown in the present description for obvious reasons of clarity). In this particular embodiment, chosen solely by way of example, the motor unit and gearbox 1 is provided with an electronic card 14, which, in particular, serves to manage the current among its various structural components. Figure 4 shows the positioning of said electronic card 14 in relation to the support cover 2, although in practice, it is generally secured so that it can be removed inside the closure cover 5., by means of a blocking element that can be elastically deformed 15. The object of showing in this form, is to show in an essential way the connection terminals 16, 17 of the electronic card 14, whose terminals are in the sockets in this example. Figure 3 also shows that the motor unit and gearbox 1 is provided with a connector 18 which serves to connect the various electrical components to a power source and / or external control. In a particularly advantageous manner, said electrical connector 18 is, in this example, molded directly into the interior of the electrically insulating plastic. As can be seen partially in Figure 3, the motor unit and gearbox 1 also have connection means 20 which are suitable for electrically interconnecting the various electrical components of the motor unit and gearbox 1, i.e. , in the present example, the connector 18, the electronic card 14 and the electric motor 3. As shown in Figure 5, the electric motor 3 is provided with two connection plugs 21, 22, which form the supply terminals of Energy. Said power supply terminals are projected more particularly from the side of the closure support 5, in the junction plane located between the housing 19 of the electric motor 3 and the support cover 2. Said terminals can be accessed in this way from the upper portion of the motor unit and gearbox 1. According to the present invention, the connection means 20 of this particular embodiment comprise two conductor tracks 23, 24, which are molded in the closure cover 5, and which are provided with a notch 25, 26 suitable for cooperation by interacting with one of the connection plugs 21, 22 of the electric motor 3. In addition, the track portions 27a, 27b, 28a, 28b longitudinally define each notch 25, 26 suitable to exert contact pressure by elastic deformation on the respective faces of the associated connecting plug 21, 22. Figure 6 also shows a first insert 37 made of a conductive material, whose insert is designed to be integrated by molding within the insulating material of the closure cover 5, such that, once it is cut, it constitutes the future conductive tracks 23, 24 which they are shown in part in Figure 3. It can be seen that the ends 38, 39 have conventional single socket shapes because they are designed to fit within the sockets 16 of the electronic card 14. As a comparison, Figure 7 shows a second insert 80 made of a conductive material, whose insert is also designed to be integrated by the molding within the insulating material of the closure cover 5. Although the purpose at this point is to constitute the future conductive tracks 81 which serve to connect in electrical form the connector 18, by means of the ends 82, to the sockets 17 of the electronic card 14, by means of the ends 83. In a characteristic of the present invention, the minimum width of each notch 25, 26 is significantly less than the thickness of the associated connection plug 21, 22. Combined with the intrinsic elasticity of the material of which each conductive track 23, 24 is elaborated, this feature makes it possible to generate the necessary pressure to ensure that contact was established between each track portion 27a, 27b, 28a, 28b and the respective face of the corresponding connecting plug 21, 22. As shown in Figure 8, each notch 25 , 26 is provided through the conductive track 23, 24, substantially perpendicular to the faces of said conductive track. Each notch 25, 26 is also provided with a "lateral" opening 29, 30, which opens at the lateral edge of the conductive track 23, 24. This feature means that the interaction coupling between each connecting plug 21, 22 and its notch 25, 26 occurs in the substantially orthogonal planes. In this embodiment, each notch 25, 26 is also longitudinally provided at one end of the conductive track 23, 24 and its side opening 29, 30 is opened in the portion that is additional or more distal to said end of the track. As can also be seen in Figure 8, the wall defining each notch 25, 26 is provided with four convex portions 31, 32, which are suitable to cooperate by contact with the associated connection plug 21, 22. In other words , this means that the cross section of each notch 25, 26 is not constant, and that the projection portions of the existing wall have the ability to ensure that contact is established with the corresponding face of the associated connection plug 21, 22 , even if the contact is only local. It was also noted that the wall portion defining the end wall 33, 34 of each notch 25, 26 has a profile that is surrounded, and preferably, that is substantially circular. This feature makes it possible to increase the tearing force of each conductor track 23, 24 in an area in which the mechanical stresses can become relatively high. This is applied precisely when the track portions 27a, 27b, 28a, 28b are separated by inserting a connecting plug 21, 22 into the corresponding notch 25, 26. It was also noted that each wall portion defining the side opening 29 , 30 inside a notch 25, 26 is provided with a bevel 35a, 35b, 36a, 36b which make it possible to facilitate the insertion of the associated connecting plug 21, 22. Finally, each notch 25, 26 substantially has a keyhole shape. As shown in Figure 9, the motor unit and gearbox 1 have guide means 40, which are suitable for guiding the coupling of each connection plug 21, 22 into the corresponding notch 25, 26 of the conductive track associated 23, 24. This feature makes it possible to guarantee the effective connection when a connecting plug 21, 22 and its notch 25, 26 are brought together, even if a perfect co-linearity was not established. In a feature of the present invention, the guide means 40 of the same connection plug 21, 22 comprise two projection elements 41, 42 which are integral with or secured to the closure cover . As shown in Figure 10, each of said two projecting elements 41, 42 is also suitable for cooperating by sliding with one edge of a respective face of the connecting plug 21, 22, simultaneously with said connecting plug 21. , 22 being coupled in the corresponding notch 25, 26 of the associated conductor track 23, 24. As can be seen in Figures 9 and 10, the two guide elements 41, 42 for guiding the same connection plug 21, 22 are placed facing each other, at a distance substantially corresponding to the thickness of said connecting plug 21, 22, and in the vicinity of the corresponding notch 25, 26 of the steerable conductor track 23, 24. The space that resides between the two guide elements 41, 42 then extends towards the notch 25, 26, in such a way that one of the longitudinal edges of the connection plug 21, 22 is suitable to be coupled at that site during a connection. Each of the oriented faces of the two guiding elements 41, 42 is then suitable to cooperate by sliding contact with the inner edge of a respective face of the connecting plug 21, 22. Particularly advantageously, each guide element 41, 42 to guide the same connection plug 21, 22 is provided in its distal portion with a bevel 43, 44, which is formed facing the other guide element 41, 42. Each of said bevels 43, 44 is also suitable for guiding the insertion of a respective edge of the connecting plug 21, 22 between said guide elements 41, 42, simultaneously with said connecting plug 21, 22 being axially coupled within the corresponding notch 25, 26 of the associated conductor track 23, 24. In this particular embodiment, the two guide elements 41, 42 are placed between the two conductor tracks 23, 24, and are suitable for simultaneously guiding the couplings of the two plugs connection 21, 22 of the electric motor 3 in the notches 25, 26 which are respectively associated with these. This means that the two guiding elements 41, 42 are simultaneously suitable for cooperating by sliding contact with both connection plugs 21, 22. Figure 9 also shows that the motor unit and gearbox 1 which is provided with means of positioning 50 making it possible to place each notch 25, 26 of a conductive track 23, 24 by orienting the corresponding connecting plug 21, 22 before coupling. Because this is mounted along the output shaft 9, the closure cover 5 can, a priori, rotate about that axis. Therefore, it is important to position them in an angularly correct manner before attempting to connect the conductor tracks 23, 24 to the connection plugs 21, 22, in order to ensure that the connection problems do not arise subsequently. This prior arrangement consists in a practical way in arranging the notches 25, 26 vertically in register with, although at a certain distance from the connection plugs 21, 22. In a feature of the present invention, the positioning means 50 is provided with at minus one projection element 51, 52, which is integral with or secured to the closure cover 5, and which is suitable to cooperate by interacting with a groove 53, 54 in a substantially complementary manner, provided in one of the other component elements of the unit. motor and gearbox 1 (Figure 5). Said element can, for example, be the electric motor 3 or the support cover 2. In a particularly advantageous manner, each positioning element 51, 52 is provided with at least one bevel 55, 56 which is formed at its distal end and which is suitable for facilitating the insertion thereof in the corresponding slot 53, 54. In this particular embodiment, the positioning means 50 comprises two positioning elements 51, 52, which are suitable for cooperating by interaction with those respective of two Slots 53, 54 in a substantially complementary manner, provided through the housing 19 of the electric motor 3. Figure 9 also shows that the motor unit and gearbox 1 is provided with splice means 60 which are suitable for blocking the insertion of the motor. each connecting plug 21, 22 within the corresponding notch 25, 26 of the associated conductive track 23, 24, when the distal end of said connecting plug 21, 22 reaches the vicinity of the end wall 33, 34 of said notch 25, 26. This feature makes it possible to limit the relative interaction between the two portions of each connection, and consequently, prevent the plug 21, 22 from coming into contact within the projection against the end wall of the groove 25, 26. The object is to avoid any deformation that may arise from a loss of electrical contact, regardless of whether said deformation occurs in the connection socket 21, 22 or in the notch 25, 26. In a of the present invention, the connecting means 60 comprise at least one projecting rivet 61 which is integral with or secured to the closure cover 5, and which is suitable for cooperating by blocking contact with one of the elements of the invention. component of the motor unit and gearbox, such as, for example, the electric motor 3 or the support cover 2. In this particular embodiment, the connecting means 60 comprise a single rivet 61 projecting between the two elements 51, 52. Said rivet 61 is also suitable for cooperating by blocking contact with that area of the housing 19 of the electric motor 3, which is placed between the two slots 53, 54, serving to receive said positioning elements 51, 52. Figure 9 also shows that the motor unit and gearbox 1 is provided with insulation means 70, which are suitable for the electrical isolation of each cone. This connection is formed by a connecting plug 21, 22 being fitted within a notch 25, 26 of a conductive track 23, 24 in relation to the other conductive elements of the motor unit and gearbox 1, in particular, the housing 19. of the electric motor 3. In any case, the purpose of this feature is to avoid the electric arcs produced by the tapping between each connection and its immediate or direct surrounding metallic environment. In one feature of the present invention, the insulation means 70 has at least one electrically insulating wall 71, 72, 73, which are integral with or secured to the closure cover 5 and form a continuous screen around of at least a portion of conductive track 23, 24 provided with a notch 25, 26. In this particular embodiment, the insulating means 70 comprises a first electrically insulating wall 71, which joins the positioning element 51. to the guide element 42, a second electrically insulating wall 72, which connects the same guide element 42 to the positioning element 52, and a third electrically insulating wall 73, which connects said connecting elements 51, 52 together as they pass around the portions of conductive track 23, 24 which are provided with those respective of the two notches 25, 26. In a particularly advantageous manner, the means of isolation These are also suitable for protecting the structural integrity of each portion of conductive track 23, 24 which is provided with a notch 25, 26. As can be seen in the embodiment shown in the Figure , the connection plugs 21, 22 of the electric motor 3 are mounted on an elaborate bakelite support 90 which was secured to the interior of the housing 19 and which can be referred to as a "carbon brush holding plate". It should be noted that a support made of plastic could be used in an equivalent way. Naturally, the present invention also refers to any windshield wiper device that includes at least one motor unit and gearbox 1 as described above. It should also be noted that, in this type of application, a motor unit and gearbox of the present invention can equip a windshield wiper device either rear or front. However, the present invention can be applied to different fields of windshield wipers. In fact, the present invention relates more generally to any motor vehicle equipped with at least one motor unit and gearbox as described above.

Claims (26)

NOVELTY OF THE INVENTION CLAIMS

1. - A motor unit and gearbox (1) in particular for a motor vehicle windshield wiper mechanism, said motor unit and gearbox comprising a support cover (2) on which an electric motor (3) is mounted. ) coupled to a gearbox (4), a closing cover (5) covering the support cover (2), and connection means (20) that electrically interconnect the various electrical components of the motor unit and gearbox (1), said motor unit and gearbox is characterized in that the connection means (20) comprise at least one conductive track (23, 24), which is molded inside the closing cover (5), and which is provided with at least one notch (25, 26) suitable for cooperating by interacting with a connecting plug (21, 22) of one of the electrical components of the motor unit and the control box. gears (1), track portions (27a, 27b, 28a, 28b) define each notch (25, 26) longitudinally, being suitable for exerting pressure contact by elastic deformation on the respective faces of the associated connection plug (21, 22).

2. The motor unit and gearbox (1) according to claim 1, further characterized in that the minimum width of each notch (25, 26) is significantly less than the thickness of the associated connection plug (21, 22). ).

3. The motor unit and gearbox (1) according to claim 1 or claim 2, further characterized in that each notch (25, 26) is provided through the conductive track (23, 24) in a form substantially perpendicular to the faces of said track, and is provided with a "lateral" opening (29, 30) that opens in said side wall of said conductive track (23, 24).

4. The motor unit and gearbox (1) according to any of claims 1 to 3, further characterized in that each notch (25, 26) is provided longitudinally at one end of the conductive track (23, 24) , and that its lateral opening (29, 30) opens in the portion that is additional or distal to said track end.

5. The motor unit and gearbox (1) according to any of claims 1 to 4, further characterized in that the wall defining each notch (25, 26) has at least one convex portion (31, 32). ) suitable for cooperating by contact with the associated connecting plug (21, 22).

6. The motor unit and gearbox (1) according to any of claims 1 to 5, further characterized in that the wall portion defining the end wall (33, 34) of the notch (25, 26) has a profile that is rounded and preferably, which is substantially circular.

7. - The motor unit and gearbox (1) according to any of claims 1 to 6, further characterized in that each wall portion defining the side opening (29, 30) within a notch (25, 26) is provides a bevel (35a, 35b, 36a, 36b) suitable to facilitate the insertion of the associated connection plug (21, 22). 8.- The motor unit. and gearbox (1) according to any of claims 1 to 7, further characterized in that it further comprises guiding means (40) suitable for guiding the coupling of each connection plug (21, 22) within the corresponding notch (25). , 26) of the associated conductive track (23, 24). 9. The motor unit and gearbox (1) according to claim 8, further characterized in that the guide means (40) for guiding any of the connection plugs (21, 22) comprises two projection elements (41). , 42), which are integral with or secured to the closure cover (5) and each of which is suitable for cooperating by sliding with one edge of a respective face of the connecting plug (21)., 22), simultaneously with said connecting plug (21, 22) being axially coupled within the corresponding notch (25, 26) in the associated conductive track (23, 24). 10. The motor unit and gearbox (1) according to claim 9, further characterized in that the two guiding elements (41, 42) for guiding any of the connection plugs (21, 22) are placed oriented between yes, at a distance substantially corresponding to the thickness of said connection plug (21, 22) and in the vicinity of the corresponding notch (25, 26) in the associated conductive track (23, 24), the space between said guide elements ( 41, 42) extending oriented to said notch (25, 26). 11. The motor unit and gearbox (1) according to claim 9 or claim 10, further characterized in that each guide element (41, 42) for guiding any of the connection plugs (21, 22) is provides in its distal portion with a bevel (43, 44), which are formed oriented to the other guide element (41, 42) and which is suitable for guiding the insertion of an edge of the connection plug (21, 22) between said guide elements (41, 42), simultaneously with the axial coupling of said connection plug (21, 22) in the corresponding notch (25, 26) in the associated conductive track (23, 24). 12. The motor unit and gearbox (1) according to any of claims 1 to 11, further characterized in that it additionally comprises positioning means (50) suitable for placing each notch (25, 26) of a conductive track (23, 24) oriented to the corresponding connection plug (21, 22) before these are coupled together. 13. The motor unit and gearbox (1) according to claim 12, further characterized in that the positioning means (50) comprise at least one projection element (51, 52), which is integral with or secured to the closure cover (5), and which is suitable to cooperate by interacting with a groove (53, 54) in a substantially complementary manner that is provided in one of the other component elements of the motor unit and housing. gears (1). 14. The motor unit and gearbox (1) according to claim 13, further characterized in that each of the positioning elements (51, 52) is provided with at least one bevel (55, 56), which is formed at its distal end, and which is suitable to facilitate its insertion into the corresponding slot (53, 54). 15. The motor unit and gearbox (1) according to any of claims 1 to 14, further characterized in that it additionally comprises splice means (60) suitable for locking insertion of each connection plug (21, 22). ) within the corresponding notch (25, 26) of the associated conductive track (23, 24), when the distal end of said connecting plug (21, 22) reaches the vicinity of the end wall (33, 34) of said notch (25, 26). 16. The motor unit and gearbox (1) according to claim 15, further characterized in that the splice means (60) comprise at least one projection rivet (61) that is integral with or secured to the closing cover (5), and which is suitable for cooperating by blocking contact with one of the other component elements of the motor unit and gearbox (1). 17. The motor unit and gearbox (1) according to any of claims 1 to 16, further characterized in that it additionally comprises insulation means (70) suitable for electrically isolating each connection constituted by the coupling of a connecting plug (21, 22) in a notch (25, 26) in a conductive track (23, 24) in relation to the other conductive elements of the motor unit and gearbox (1). 1

8. The motor unit and gearbox (1) according to claim 17, further characterized in that the insulation means (70) comprise at least one electrically insulating wall (71, 72, 73), which is integral with or secured to the closure cover (5), and which forms a continuous screen around at least a portion of the conductive track (23, 24) that is provided with a notch (25, 26) . 1

9. The motor unit and gearbox (1) according to claim 17 or claim 18, further characterized in that the insulation means (70) are also suitable to protect the structural integrity of each portion of the conductive track. (23, 24) that is provided with a notch (25, 26). 20. The motor unit and gearbox (1) according to any of claims 1 to 19, further characterized in that the electric motor (3) is provided with two connection plugs (21, 22) forming the terminals of power supply, and that the connection means (20) comprise two conductive tracks (23, 24), which are molded in the closure cover (5) and each of which is provided with a notch (25, 26) suitable for cooperating by interacting with one of said connection plugs (21, 22). 21. The motor unit and gearbox (1) according to any of claims 8 to 20, further characterized in that the guide means (40) comprise two guide elements (41, 42) which are placed between the two conductor tracks (23, 24), and which are suitable for guiding simultaneously the couplings of the two connection plugs (21, 22) of the electric motor (3) into the notches (25, 26) in said tracks ( 23, 24) that are associated in a respective way with them. 22. The motor unit and gearbox (1) according to any of claims 12 to 21, further characterized in that the positioning means (50) comprise two positioning elements (51, 52) which are suitable for cooperating by interaction with those of the respective two grooves (53, 54) of substantially complementary shapes that are provided through the housing (19) of the electric motor (3). 23. The motor unit and gearbox (1) according to any of claims 15 to 22, further characterized in that the connecting means (60) comprise a rivet (61) that projects between the two positioning elements (51, 52) and that are suitable for cooperating by blocking contact with that area of the housing (19) of the electric motor (3), which is located between the two slots (53, 54) serving to receive said positioning elements (51). , 52). 24. The motor unit and gearbox (1) according to any of claims 1 to 23, further characterized in that the closing cover (5) is made of an electrically insulating material. 25. A windshield wiper device, characterized in that it includes at least one motor unit and gearbox (1) according to any of the preceding claims. 26.- A motor vehicle, characterized in that it includes at least one motor unit and gearbox (1) according to any of Claims 1 to 24.