Printed circuit board assembly, method for manufacturing a printed circuit board assembly and cooling fan module

Abstract

Printed circuit board arrangement (1), comprising a printed circuit board (2) which has a printed circuit board overmolding (3), a motor carrier (5) which has at least one positioning recess (6) and an axis (8), wherein the motor carrier (5) is formed by overmolding the axis (8), and at least one positioning pin (4) formed on the printed circuit board overmolding (3), which is raised from the printed circuit board overmolding (3) and is arranged with respect to the positioning recess (6) in such a way as to position the printed circuit board (2) with respect to the motor carrier (5) when the positioning pin (4) engages in the positioning recess (6).

Description

AREA OF INVENTION

[0001] The present invention relates to a printed circuit board assembly. The present invention further relates to a method for manufacturing such a printed circuit board assembly and to a cooling fan module. TECHNICAL BACKGROUND

[0002] Radiator fan modules are well-known and generally feature a motor mount that holds motor components on one side and the electronics for controlling the motor on the other. The electronic components are typically arranged on a printed circuit board (PCB), which is in turn supported by the motor mount. The PCB may, for example, contain a die-cut grid.

[0003] The printed circuit board (PCB) is typically attached and positioned relative to the motor mount using mounting bosses and holes formed on and / or in the motor mount. Fasteners are inserted into these bosses and holes, extending through the PCB and connecting to the motor mount.

[0004] WO 2007 / 077066 A1 describes a printed circuit board arrangement comprising a printed circuit board and a thermally and electrically conductive housing to which the printed circuit board is attached, and an electrically insulating and thermally conductive sieve-like body that mechanically and thermally couples the printed circuit board to the housing.

[0005] DE 10 2005 017 838 A1 describes a circuit arrangement comprising a housing and a printed circuit board populated with electrical components. The printed circuit board forms part of a wall of the housing.

[0006] Correct positioning of the circuit board in the motor mount is essential for a functioning cooling fan module. However, centering the circuit board using mounting bosses and holes in the motor mount is not trivial, as tolerances of the circuit board and the motor mount are difficult to match and are subject to significant process variations.

[0007] Furthermore, the fastening and positioning of the circuit board in relation to the motor carrier using mounting bosses and holes in the motor carrier is very labor-intensive and therefore costly. SUMMARY OF THE INVENTION

[0008] Against this background, the present invention aims to provide a printed circuit board arrangement which has a simple yet functional design and also positions a printed circuit board in a simple manner with respect to a motor carrier.

[0009] According to the invention, this problem is solved by a printed circuit board arrangement with the features of claim 1 and / or by a method with the features of claim 13 and / or by a cooling fan module with the features of claim 14.

[0010] Accordingly, the following is planned: – A printed circuit board assembly comprising a printed circuit board having a printed circuit board overmolding, a motor carrier having at least one positioning recess, and at least one positioning pin formed on the printed circuit board overmolding, which is raised from the printed circuit board overmolding and is arranged with respect to the positioning recess in such a way as to position the printed circuit board with respect to the motor carrier when the positioning pin engages in the positioning recess. – A method for manufacturing a printed circuit board assembly, comprising: holding an axis on one of its end faces by means of a retaining pin; forming a motor carrier such that a positioning recess is formed in the area of ​​the retaining pin; overmolding a printed circuit board such that a positioning pin is formed on the printed circuit board overmolding during overmolding; positioning the printed circuit board with respect to the motor carrier by arranging the positioning pin in the positioning recess. – A cooling fan module, comprising a fan wheel, an electric motor for driving the fan wheel, a motor carrier which carries the electric motor and a circuit board, and a circuit board arrangement according to the invention.

[0011] The underlying idea of ​​the present invention is to design a printed circuit board (PCB) and a motor mount in such a way that the secure and reliable positioning of the PCB relative to the motor mount is simplified. For this purpose, the PCB has a positioning pin, which is part of an overmold. When the positioning pin engages in the positioning recess, it positions the PCB relative to the motor mount virtually automatically, thus enabling very simple positioning of the PCB relative to the motor mount.

[0012] The positioning pin engages, for example, in a form-fit and / or force-fit manner or alternatively with play in the positioning recess, thus positioning the circuit board relative to the motor carrier.

[0013] The positioning recess is advantageously formed directly during the overmolding of an axis to create the motor mount, making it very cost-effective to manufacture. Since the axis is overmolded during the injection molding process, it must be held in place by a tool, such as a hold-down pin, which effectively creates the positioning recess as part of the process. Because the positioning recess is advantageously located centrally in the motor mount, material shrinkage due to cooling of the overmolded material has very little impact on the position and shape of the recess. Therefore, the positioning recess and the positioning pin can be manufactured with very tight form and position tolerances. This ensures very high positional accuracy of the circuit board relative to the other interfaces. Furthermore, eliminating screw bosses and holes in the motor mount reduces costs.Furthermore, the tolerance chain is kept very small.

[0014] Advantageous embodiments and further developments are described in the dependent claims and in the description with reference to the figures of the drawing. In a particularly preferred embodiment of the present invention, the positioning pin engages in the positioning recess in a positive-locking and / or force-locking manner. For example, the positioning pin and the positioning recess have corresponding circular shapes. In this way, the positioning pin is positively locked into the positioning recess and automatically positions the circuit board relative to the motor carrier. Furthermore, according to an advantageous further development, the positioning pin could, for example,The positioning pin can have a triangular, square, or polygonal cross-section, or, for example, a cross-section corresponding to an irregular triangle, with the positioning recess having a cross-section corresponding to the positioning pin. This further simplifies the positioning of the circuit board relative to the motor mount. Furthermore, the positioning pin can also have an interference fit with the positioning recess, so that a force-fit connection is created when the positioning pin engages the recess. This ensures that the circuit board is mounted very securely and firmly relative to the motor mount. Alternatively, the positioning pin engages the positioning recess with some play.

[0015] According to a further preferred embodiment of the present invention, the positioning pin is at least partially elastic. For example, the positioning pin can be made of a material that has elastic properties, e.g., an elastomeric and / or thermoplastic polymer. This design allows for further cost savings, as the positioning pin can be manufactured with larger tolerances.

[0016] According to a further preferred embodiment of the present invention, the positioning pin has a notch, which can be formed, for example, on the end face of the positioning pin. The notch can, for example, have a semicircular shape and extend into the positioning pin. The elasticity of the positioning pin can be adjusted, for example, by the size and position of the notch.

[0017] According to another preferred embodiment, the positioning pin has an interference fit with respect to the positioning recess. For example, the positioning pin has a transition fit or an interference fit with respect to the positioning recess. In this way, a very secure and long-lasting positioning of the printed circuit board with respect to the motor carrier is ensured.

[0018] According to a further advantageous embodiment, the engine mount is designed as an injection-molded part. For example, the engine mount can be made of a light metal, a plastic, and / or a glass fiber-reinforced plastic and manufactured using an injection molding process. This reduces costs, as the injection-molded design offers particular cost advantages for high production volumes.

[0019] According to a further advantageous embodiment, the motor mount has an axle. The motor mount is formed by overmolding the axle. For this purpose, an axle is held by a holding device and arranged in an injection mold. During the overmolding process, the motor mount is formed, with the positioning recess being created in the area of ​​the holding device. In this way, costs for forming the positioning recess can be saved, as it is an integral part of the motor mount's production. Advantageously, the axle has a centering bore into which a hold-down pin engages during the overmolding process. Since the centering bore of the axle is very precise, the positioning recess of the motor mount is also very accurate in its position and shape.

[0020] According to a further advantageous embodiment, the printed circuit board has at least one second positioning pin. Furthermore, the motor carrier has at least one second positioning recess, wherein the second positioning pin is designed to additionally position the printed circuit board relative to the motor carrier when the second positioning pin engages in the second positioning recess. For example, the second positioning recess and the second positioning pin have a circular shape. In this way, a positive-locking connection is formed between the second positioning pin and the second positioning recess. The second positioning pin can have a clearance fit relative to the second positioning recess.This creates a fixed-floating bearing arrangement for the printed circuit board (PCB) relative to the motor mount. The fixed bearing is formed by the first positioning pin and the first positioning recess, while the floating bearing is formed by the second positioning pin and the second positioning recess. This ensures very precise positioning of the PCB relative to the motor mount. Furthermore, this arrangement effectively compensates for thermal expansion of the PCB and / or the motor mount. Third and fourth positioning pins can also be incorporated into the PCB, and corresponding third and fourth positioning recesses can be incorporated into the motor mount. This further enhances the precision of the PCB's positioning relative to the motor mount.

[0021] According to a further advantageous embodiment, the printed circuit board is designed as a stamped grid, e.g., made of sheet metal. However, the stamped grid can also be made of a copper alloy and / or an iron alloy and / or a light metal alloy. In this way, the costs for the printed circuit board assembly can be further reduced, since such a stamped grid is very inexpensive to manufacture.

[0022] According to a further embodiment of the present invention, the engine mount is made of a lightweight metal, e.g., an aluminum alloy. For example, the engine mount is manufactured using an injection molding process. This further reduces the cost of the engine mount. Furthermore, this increases the performance of the radiator fan module because the engine mount has a very low weight.

[0023] According to another embodiment, the printed circuit board overmolding is made of a plastic. For example, the overmolding is made of a plastic that is insensitive to heat, acids, and / or bases. For example, the overmolding is made of an elastomeric plastic and / or a thermoplastic. It is also possible to form the overmolding from a two-component injection-molded part, wherein the overmolding is formed from the first component and the positioning pin from a second component. In this way, the positioning pin can be designed with a different elasticity than the rest of the overmolding.

[0024] The above embodiments and further developments can be combined with one another as appropriate. Further possible embodiments, further developments, and implementations of the invention also include combinations of features of the invention described previously or subsequently with regard to the exemplary embodiments, even if not explicitly mentioned. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention. CONTENT OF THE DRAWING

[0025] The present invention will be explained in more detail below with reference to the exemplary embodiments shown in the schematic figures of the drawings. These show:

[0026] Fig. 1 a sectional view of a printed circuit board arrangement according to a first embodiment;

[0027] Fig. 2 a sectional view of a section of a printed circuit board arrangement according to a second embodiment;

[0028] Fig. 3 a sectional view of a printed circuit board arrangement according to a third embodiment;

[0029] Fig. 4 a flowchart illustrating a process for manufacturing a printed circuit board assembly;

[0030] Fig. 5 a cooling fan module according to one embodiment;

[0031] Fig. 6 a top-side perspective of an electrical drive arrangement which includes a printed circuit board arrangement according to the invention;

[0032] Fig. 7 the electrical drive arrangement accordingly Fig. 6 in a bottom-up perspective;

[0033] Fig. 8 the electrical drive arrangement accordingly Fig. 6 in an exploded view;

[0034] Fig. 9 another application example of the electric drive arrangement accordingly Fig. 6;

[0035] Fig. 10 a detailed representation of the electrical drive arrangement in the area of ​​the interface between the circuit board arrangement according to the invention and the cable connection attached thereto;

[0036] Fig. 11 a detail of a connector module for the interface between the printed circuit board arrangement according to the invention and the cable connection.

[0037] The accompanying drawings are intended to provide a further understanding of the embodiments of the invention. They illustrate embodiments and, in conjunction with the description, serve to explain the principles and concepts of the invention. Other embodiments and many of the advantages mentioned will become apparent with reference to the drawings. The elements of the drawings are not necessarily shown to scale.

[0038] In the figures of the drawing, identical, functionally equivalent and similarly acting elements, features and components – unless otherwise stated – are each provided with the same reference symbols. DESCRIPTION OF EXAMPLES OF EXECUTION

[0039] Fig. Figure 1 shows a schematic sectional view of a printed circuit board arrangement 1 according to one embodiment of the present invention. The printed circuit board arrangement 1 a circuit board 2 on, which is a printed circuit board overmolding 3 includes the circuit board 2 It can, for example, be designed as a stamped grid made of sheet metal material, which is then overmolded on a printed circuit board. 3 It is overmolded from a plastic material. The overmolding of printed circuit boards. 3 features a positioning pin 4 on, which differs from the printed circuit board overmolding 3 extends or lifts off.

[0040] The positioning pin 4 It is located approximately in the middle of the circuit board. 2 arranged, and in the illustrated embodiment extends downwards. For example, the positioning pin protrudes 5 mm to 30 mm from the circuit board. 2 ab. In the illustrated embodiment, the positioning pin 4 a circular shape.

[0041] Below the circuit board 2 is an engine mount 5 arranged, which has a positioning recess 6 It features the positioning recess. 6 indicates a positioning pin 4 The corresponding shape is formed when the positioning pin engages. 4 into the positioning recess 6 will the circuit board 2 regarding the engine mount 5 correctly, i.e., positioned in its intended position. Both the positioning pin 4as well as the positioning recess 6 are advantageously located approximately in the middle of the circuit board 2 and the engine mount 5 arranged. In this way, material shrinkage has a very small impact on the shape and position of the positioning pin. 4 and the positioning recess 6 The engine mount 5 This is advantageously achieved by overmolding an axle. 8 formed. Preferably the engine mount 5 made of a lightweight metal, for example an aluminum alloy.

[0042] The positioning pin 4 preferably engages in the positioning recess by force-fit and / or form-fit connection 6 of the engine mount 5 one. In this way, a very safe and precise positioning of the printed circuit board is achieved. 2 regarding the engine mount 5 guaranteed.

[0043] The positioning pin4 It is advantageously designed to be at least partially elastic. This design allows for a lower form tolerance in the positioning pin design. 4 be larger.

[0044] As in Fig. As shown in 1, phase connections extend 12 through the circuit board 2 and through the engine mount 5 through. Due to the correct positioning of the circuit board 2 regarding the engine mount 5 can the phase connections 12 It can be positioned very easily for connection to the motor.

[0045] On the right side of the circuit board arrangement 1 in Fig. 1 is a second positioning pin 10 and a second positioning recess 11 shown. Also the second positioning pin. 10 and the second positioning recess 11are coupled to each other by positive locking and / or force locking. The second positioning pin 10 and the second positioning recess 11 position the circuit board 2 additionally regarding the engine mount 5 The second positioning pin 10 and the second positioning recess 11 can the first positioning pin 4 and the first positioning recess 6 be appropriately trained.

[0046] The circuit board arrangement 1 It also features an electrical interface 17 on, which control and electrical supply of the components on the circuit board 2 This interface serves existing electrical components and / or an electric motor (not shown here). The exact design and function of this electrical interface are described below. 17 will be discussed below with reference to the Fig. 5 to Fig. 10 explained in more detail.

[0047] The electrical interface 17 has a plug 18 with several connectors, via which the circuit board arrangement 1 It can be coupled to a correspondingly designed socket of a connecting cable (not shown here). In the circuit board arrangement according to the invention, the connector has 18 a spring-like contour over which this plug 18 It can be plugged into the circuit board assembly. This results in a removable, yet very secure and sealed plug connection between the electrical interface. 17 and the circuit board arrangement 1 .

[0048] Fig. Figure 2 shows a schematic sectional view of a section of a printed circuit board arrangement. 1 according to one embodiment of the present invention. In Fig. 2 is the positioning advantage 4 and the positioning recess 6 compared to the Fig. 1 shown enlarged. How to in Fig. 2 detects, the positioning pin engages 4 directly into the positioning recess 6 of the engine mount 5 one. The positioning recess 6 This is advantageously done during the overmolding process of the axle. 8 to form the engine mount 5 formed. The axis 8 of the engine mount 5 features a centering bore 9 up. Into this centering hole 9 A holding device engages to hold the axle 8 one, if the engine mount 5 by overmolding the axle 8 is formed.

[0049] Since the centering hole 9 the axis 8 The positioning recess is also positioned very precisely. 6 during overmolding of the axle 8formed with very tight tolerances. Furthermore, it can be seen in Fig. 2, that the position pin 4 a notch 7 in the illustrated embodiment, the notch has 7 a spherical segment-shaped design. In this way, the positioning pin 4 elastically designed.

[0050] Fig. Figure 3 shows a schematic sectional view of a printed circuit board arrangement according to a further embodiment of the present invention. As can be seen in Fig. Once 3 is detected, the positioning pin engages. 4 into the positioning recess 6 form-fitting. As one can see in Fig. 3 recognizes, extend through the circuit board 2 and the printed circuit board overmolding 3 Phase connections 12 These phase connections 12 extend through the circuit board 2 and are in contact with the circuit board 2Advantageously, the circuit board 2 designed as a stamped grid. Due to the correct positioning of the circuit board. 2 regarding the engine mount 5 can the phase connections 12 must be positioned very precisely so that they are connected to a motor located on the lower side of the motor mount. 5 is arranged without further assembly steps being able to be contacted.

[0051] Fig. Figure 4 shows a schematic flowchart illustrating the process for manufacturing a printed circuit board assembly. 1According to an embodiment of the present invention. In the first process step S1, an axle is held on one of its end faces by means of a retaining pin. In a second process step S2, the axle is overmolded to form a motor carrier, whereby a positioning recess is formed in the area of ​​the retaining pin during the overmolding process. In a third process step, a printed circuit board is overmolded, whereby a positioning pin is formed on the overmolding during the overmolding process. In a fourth process step S4, the printed circuit board is positioned relative to the motor carrier by inserting the positioning pin into the positioning recess.

[0052] Fig. 5 shows a cooling fan module 15 according to one embodiment of the present invention. The cooling fan module 15 a fan wheel 13 up. The fan wheel 13 is powered by an electric motor 14powered. Advantageously, the electric motor 14 and the fan wheel 13 It is designed integrally as an external rotor motor. This means that the axis 8 is stationary, and the rotor is in the fan wheel 13 is arranged. Furthermore, the cooling fan module has 15 an engine mount 5 on which the axis 8 of the electric motor 14 carries. On the other side of the engine mount 5 is a printed circuit board 2 arranged. The circuit board 2 features a printed circuit board overmolding 3 up. To the circuit board 13 and on the engine mount 5 is a case 16 It is designed to protect the circuit board from environmental influences. Furthermore, the cooling fan module features 15 a printed circuit board arrangement 1 according to the invention. This design of the cooling fan module 15 can a printed circuit board 2very simple and inexpensive with regard to the engine mount 5 be positioned.

[0053] The Fig. 6 to Fig. 9 each show with reference marks 20 designated an electrical drive arrangement, for example for a cooling fan module, which includes a printed circuit board arrangement according to the invention. Fig. Figure 6 shows the electric drive arrangement. 20 in a perspective top view, Fig. 7 in a perspective bottom view and Fig. 8 in an exploded view.

[0054] The electric drive arrangement 20 features a two-part housing 21 , 22 on, which consists of an essentially flat case base 20 and a hollow cylindrical housing tray 22 consists of. Inside the housing 21 , 22 are the circuit board arrangement according to the invention 1 as well as the electric motor 23housed the electric motor 23 It essentially consists of one component attached to the inner housing walls of the housing part. 22 ring-shaped stator 24 as well as one therein across the axis 8 rotatably mounted rotors 25 The electric motor 23 is also on the engine mount 5 arranged, for example, by the housing part 22 with the stator attached therein 24 on one side of the engine mount 5 , which the circuit board 2 It is positioned opposite, rests on it, and is attached there. On the other side of the engine mount. 5 is the circuit board 2 attached, as can already be seen from the Fig. 1 to Fig. Section 5 was explained. The corresponding phase connections protrude there for this purpose. 12 , which are from the circuit board 2 or the overmolding of printed circuit boards 3protrude through corresponding contact holes within the motor mount 5 through to the engine-side side of the engine mount 5 corresponding contact areas 26 to contact the rotor. In this way, the rotor 25 via the phase connections 12 and the contact areas 26 supplied, i.e., supplied with an operating current.

[0055] The various elements of the electric drive arrangement 20 , for example the electric motor 23 , the circuit board arrangement 1 The housing components, as well as the other parts, can be connected to each other using appropriate fasteners such as screws and nuts. Preferably, corresponding threaded sections are already present in the motor mount for this purpose. 5 available.

[0056] In the Fig. 6 and Fig. 7 is an electrical drive arrangement according to the invention. 20depicted, in which a socket 29 with a three-core cable 27 on the plug 18 the interface 17 is plugged in.

[0057] Fig. Figure 9 shows an application example of the electric drive arrangement 20 , which is coupled here with an electrical cable for control and power supply. A flexible cable connection 27 It features respective connection sockets on both sides. 28 , 29 on. The vehicle-side socket 29 is designed to be coupled with a corresponding interface of the motor vehicle in order to supply electrical power to the electric drive system 20 to ensure. Furthermore, this socket can 29 it may also be coupled with a control unit to control the electric drive system accordingly. 20 to enable the other, motor-side bushing 28is designed to work with the interface 17 the circuit board arrangement 1 to be coupled by the plug 18 into the socket 28 is inserted.

[0058] Fig. Figure 10 shows an exploded view of the socket using a detailed illustration. 28 as well as a section of the circuit board layout 1 The socket 28 This contains two interconnectable housing parts. 30 , 31 , which are used for holding and fixing the cable 27 serve. The cable 27 It consists of two wires. 27A , 27B , e.g., the energy supply for the electric motor 23 serve this purpose. Furthermore, a control cable can be used. 27C be provided for, via which the function of the electric drive arrangement 20 is controlled. In the present example, the control cable includes 27C Three control wires for three-phase control of the electric motor.

[0059] Fig. Figure 11 shows a detailed illustration of a plug module. 32 , which the plug 18 This plug module includes... 32 is electrically connected to the circuit board on the conductor side 2 and mechanically with the printed circuit board overmolding 3 coupled. The plug module 32 It also has four connection pins or connecting studs on the socket side. 33 on. At a conductor-side interface 36 is the plug module 32 into a specially provided recess in the printed circuit board overmolding 3 Plug-in. When inserting the plug module... 32 The connecting pins make contact 33 automatically corresponding conductor tracks on the circuit board 2 .

[0060] The plug module 32 It has a spring-like contour, so that when the plug module is inserted 32into a corresponding recess in the printed circuit board overmolding 3 A sealing effect is achieved through this spring action. The spring-like contour of the connector module 32 This results from an approximately U-shaped profile. 34 of the connector module 32 , which also has a corresponding groove-shaped indentation in the middle 35 features that the plug module 32 This provides the desired spring-like flexibility in the insertion direction, thus ensuring a spring effect. In this way, a very tight and very secure contact connection between the connector module is achieved. 32 and circuit board arrangement 1 This enables it. Furthermore, it makes it possible to use different plug modules in this way. 32 , which are adapted, for example, to corresponding socket shapes and socket types, in the printed circuit board arrangement according to the invention 1to use and, if necessary, to replace. The printed circuit board arrangement according to the invention is thus very flexibly adapted to the different requirements in different countries.

[0061] Although the present invention has been fully described above with reference to preferred embodiments, it is not limited thereto, but can be modified in a variety of ways. For example, the printed circuit board can also be formed from an insulating substrate material, e.g. phenolic resin, on which one or two copper layers are applied, and from which the positioning pin extends.

[0062] Although the present invention is described using a printed circuit board arrangement or an electrical drive arrangement for a cooling fan module, it is self-evident that other applications are also possible. Furthermore, a three-phase electric motor is not necessarily required. Rather, it is also conceivable to use a two-phase or more than three-phase electric motor with an essentially similar or identical design. Reference symbol list 1 Printed circuit board arrangement 2 circuit boards 3 PCB overmolding 4 (first) positioning pins 5 engine mounts 6 (first) positioning recess 7 Notch 8-axis 9 centering bore 10 (second) positioning pin 11 (second) positioning recess 12 phase connections 13 Fan wheel 14 Electric motor 15 Cooling fan module 16 cases 17 Interface 18 plugs 20 electric drive arrangement 21 lower housing part, housing base 22 upper housing part, housing cover 23 Electric motor 24 Stator 25 Rotor 26 contact areas, sliding contacts 27 cables, cable connection 27A–27C conductors of the cable connection 28 vehicle-side socket 29 PCB-side socket 30 Housing part 31 Housing part 32 plug module 33 connection pins 34 U-shaped section of the connector module 35 groove-shaped notch in the U-shaped section of the connector module 36 Interface S1–S4 manufacturing steps QUOTES INCLUDED IN THE DESCRIPTION

[0063] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0064] WO 2007 / 077066 A1

[0004] DE 102005017838 A1

[0005]

Claims

[1] Printed circuit board arrangement ( 1 ), with a circuit board ( 2 ), which is a printed circuit board overmolding ( 3 ) shows, with an engine mount ( 5 ), which at least has a positioning recess ( 6 ) shows, with at least one on the printed circuit board overmolding ( 3 ) trained positioning pins ( 4 ), which differs from the printed circuit board overmolding ( 3 ) stands out in this way and with regard to the positioning recess ( 6 ) is arranged in such a way as to prevent interference with the positioning pin ( 4 ) into the positioning recess ( 6 ) the circuit board ( 2 ) regarding the engine mount ( 5 to position. [2] Arrangement according to claim 1, characterized by that the positioning pin ( 4 ) positively and / or force-fit into the positioning recess ( 6 ) intervenes. [3] Arrangement according to claim 1, characterized by that the positioning pin ( 4 ) with play into the positioning recess ( 6 ) intervenes. [4] Arrangement according to any of the foregoing claims, characterized by that the positioning pin ( 4 ) is at least partially elastic. [5] Arrangement according to any of the foregoing claims, characterized by that the positioning pin ( 4 ) a notch ( 7 ) exhibits. [6] Arrangement according to any of the foregoing claims, characterized by that the positioning pin ( 4 ) an excess with respect to the positioning recess ( 6 ) exhibits. [7] Arrangement according to any of the foregoing claims, characterized by that the engine mount ( 5 ) is designed as an injection-molded part. [8] Arrangement according to any of the foregoing claims, characterized by that the engine mount ( 5 ) an axis (8 ) has, wherein the engine mount ( 5 ) by overmolding the axle ( 8 ) is formed. [9] Arrangement according to claim 8, characterized by that the positioning recess ( 6 ) when holding the axis ( 8 ) is formed by means of a hold-down pin during the overmolding process. [10] Arrangement according to one of the preceding claims 8 or 9, characterized by that the axis ( 8 ) a centering bore ( 9 ) in which a hold-down pin engages during the overmolding process. [11] Arrangement according to any of the foregoing claims, characterized by that the circuit board ( 2 ) is designed as a punched grid. [12] Arrangement according to any of the foregoing claims, characterized by that the engine mount ( 5 ) is made of a lightweight metal. [13] Arrangement according to any of the foregoing claims, characterized by that the printed circuit board overmolding ( 3) is made of a plastic. [14] Method for manufacturing a printed circuit board assembly ( 1 ), in particular a printed circuit board arrangement ( 1 ) according to any one of claims 1 to 13, comprising: Holding an axle on one of its end faces by means of a hold-down pin; Forming a motor carrier such that a positioning recess is formed in the area of ​​the retaining pin; Overmolding a printed circuit board in such a way that a positioning pin is formed on the overmolding during the overmolding process; Positioning the circuit board relative to the motor carrier by inserting the positioning pin into the positioning recess. [15] Cooling fan module ( 15 ), – with a fan wheel ( 13 ), – with an electric motor ( 14 ) to drive the fan wheel ( 13 ), – with an engine mount ( 5), which powers the electric motor ( 14 ) and a circuit board ( 2 ) carries, – with printed circuit board arrangement ( 1 ) according to any one of claims 1 to 12.

Images