CN110011464B

CN110011464B - Brush holder component for an electric machine and electric machine

Info

Publication number: CN110011464B
Application number: CN201811556542.1A
Authority: CN
Inventors: M.弗兰克; P.博德纳; P.昂格瓦里; S.朔伊里希
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2017-12-20
Filing date: 2018-12-19
Publication date: 2023-05-23
Anticipated expiration: 2038-12-19
Also published as: DE102017223379A1; CN110011464A

Abstract

A brush holder component (17) for electrical contact of a commutator (55) of an electrical machine (10) and an electrical machine (10), wherein the brush holder component (17) has a base plate (32) extending transversely to a rotor shaft (20), which has a recess (34) for the center of the rotor shaft (20), wherein a brush holder (19) is connected to an electrical carbon brush (26) for contact with the commutator (55) and at least one tamper-resistant component (9) is arranged on a first axial side (31) of the base plate (32), and an electrical connection element (107) of the tamper-resistant component (9) is guided through a through-hole (108) in the base plate (32) having a wrapping edge (109) to an opposite axial side (33) of the base plate (32), wherein the connection element (107) is arranged at a distance from the wrapping edge (109) in all directions in a plane transverse to the rotor shaft (20).

Description

Brush holder component for an electric machine and electric machine

Technical Field

The invention relates to a brush holder component and an electric machine having such a brush holder component.

Background

Electric motor drives are known from the prior art, which can be used, for example, for driving seat adjusters, window lifters and/or glass wipers in motor vehicles. These electric motor drives have an electric motor arranged in a motor housing, which is in operative connection with a transmission arranged in a transmission housing, wherein the motor housing and the transmission housing are fixed to each other, for example screwed or riveted to each other. A brush holder component is arranged axially between the motor housing and the gear housing, in which a carbon brush for contacting the commutator is fixed.

A brush carrier component of this type of electric motor is known from DE 103,35,001 A1, in which an anti-interference choke is arranged in an axial receiving recess, which has an axially closed bottom. The two connecting cable ends of the choke coil are led out of the receiving recess above the open side thereof and are connected on the one hand to the carbon brushes and on the other hand to conductors which are configured for electrical contact of the plug pins in the plug collar of the external current supply.

For the design in a modular motor module component (Baukasten), the brush holder component should now always be constructed as a standard component, and only the plug modules with the corresponding electronics are adapted to the corresponding requirements. The electrical contact between the choke of the brush holder component and the different plug modules must now be designed such that, after the axial installation of the plug modules, the choke can be soldered easily and reliably to the corresponding conductors of the plug modules.

Disclosure of Invention

In contrast, the brush holder component and the electric machine according to the invention, which have the features of the independent claims, have the advantage that by constructing the through-hole with a larger diameter than the diameter of the connecting cable of the tamper-resistant component, a degree of freedom is provided for the positioning of the connecting cable in the through-hole. Thereby, the connection cables can be arranged with a sufficient spacing from the surrounding edge of the through-hole, whereby the surrounding edge of the through-hole is prevented from melting when soldering the connection cables to the respective conductors. Here, the connection cable may be bent toward the conductor within the through hole so as to perform the soldering process. As a result, the connecting cable does not rest against the surrounding edge of the through-hole at any point even after the soldering process, whereby a soldered connection can be produced without stress. As a result, the welding contact can be reliably constructed over the entire life even under high thermal stresses or high vibration loads.

Advantageous refinements and improvements of the design specified in the independent claims can be achieved by the measures listed in the dependent claims. It is particularly advantageous if the through-hole is configured in a triangular manner, wherein the corners of the triangle are rounded and thus have a radius. The through-holes are formed in the base plate of the brush holder component, which can be produced very inexpensively as a plastic injection-molded part. The triangular shape of the through-holes is particularly suitable for conductor elements having flat soldering surfaces, wherein the straight sides (gerade Seite) of the triangle extend approximately parallel to the flat soldering surfaces of the conductors. The connecting cable of the interference-free component can thus be moved in the triangular through-opening toward the flat soldering surface of the conductor. Here, the connection cable can move along the conductor along one of the flat sides of the triangle (ebene suite) within certain limits without the connection cable contacting the surrounding edge of the through hole. Thereby, tolerances in positioning the connecting cable or the welding tool can be compensated. The cable diameter of the connection cable of the interfering member is for example in the range between 0.5 and 1.0 mm. In order that the surrounding edge of the through-hole does not melt during the soldering process, the connecting cables in the soldering position have a spacing of at least 0.1mm, in particular at least 0.2 mm, relative to the surrounding edge in each direction.

If the through-hole has a bevel or taper on at least a part of the circumference with respect to the axial direction, said bevel or taper serves as a lead-in aid for the free end of the connecting element, which in the axial direction engages into its interfering member. Thereby, the mounting of the tamper-resistant member is simplified, in particular if the through hole is not arranged in the centre of the tamper-resistant member.

In this case, for example, the tamper-resistant element is arranged in a pocket-like receptacle which is open in the axial direction. Such receptacles can also advantageously be formed together in the injection molding (Spritzgie beta en) of the brush holder component. The bottom of the pocket-like receptacle is particularly advantageously formed here directly by the base plate of the brush holder component, which extends approximately transversely to the axial direction. In this case, the through-hole can be easily formed as an axial hole in the bottom of the receiving recess during injection molding.

In a preferred embodiment, the tamper element is designed as a tamper choke, which has a substantially cylindrical shape. The choke cable end is designed as a connecting cable with a circular cable cross section, which is guided axially through a through-hole in the bottom of the pocket-like receptacle. In this case, for example, the connecting cable is not centered but is arranged on one side of the pocket-like receptacle, so that the through-hole is also arranged correspondingly not in the center of the receptacle recess but on its edge. In this arrangement of the through-holes, it is particularly advantageous to construct an introduction bevel for accessing the connecting cable. Furthermore, a step can additionally be formed on the circumferential wall of the pocket-like receptacle as a recess, so that the connecting cable can be more easily inserted into the through-hole along the inner wall of the pocket-like receptacle. The interference-resistant choke is advantageously wound around a choke core, which is arranged in the center of the pocket-like receptacle.

In the installed state, the tamper-resistant component has a further connection end (Anschlucs) axially opposite the through-opening, which connection end is advantageously connected directly to the contact element of the brush holder. The brush holder preferably has a contact element, to which a spring arm for the carbon brush is fastened. At the same time, contact pieces are integrally formed, to which the connection ends of the tamper-resistant members are electrically connected. For example, the contact is configured as a welded connection or as a clip connection or as a soldered contact. For this purpose, the contact lugs of the brush holder are, for example, fork-shaped, into which the connecting cables of the choke coil are inserted.

The brush holder advantageously has axially opposite fixing tabs on the contact element, which are axially engaged by the recesses in the base plate of the brush holder component. By bending the fixing piece along the surface of the base plate, a form-locking can thus be produced, with which the brush holder is firmly fixed in the brush holder component. In this case, the contact element with contact tab and securing tab is particularly advantageously arranged adjacent to the tamper element, so that the electrical connection between the tamper element and the contact element of the brush holder can be achieved with a very short stroke. Since the electrical contact is located axially opposite the bottom face of the interference-resistant component and of the receiving recess of the contact element, the contact piece of the brush holder is freely accessible even after the brush holder and the interference-resistant component have been mounted axially, in order to form, for example, a welded connection.

In a preferred embodiment, the brush holder component according to the invention is installed in an electric machine, as it is used, for example, for comfort drives in motor vehicles. In this case, the plug module is placed axially on the brush holder component, said plug module being adaptable to the user's requirements for electrical contact of the electric machine. Such a plug module has electrical conductors for electrical contact, which are connected to the connection elements of the tamper-resistant component after axial installation of the plug module. The electrical conductor is in this case particularly inexpensive in the form of a stamped and bent part, which has a rectangular cross section, for example. In order to form a welded connection between the electrical conductor and the connecting element of the tamper-resistant component, the flat sides of the rectangular profile form a welding surface to which the connecting element is welded. The connecting element is designed, for example, as a circular connecting cable, which is pressed against and welded to a flat welding surface by means of a welding clamp. In this case, not only the flat soldering surfaces but also the connecting cables are oriented approximately parallel to one another in the axial direction.

In a variant of the invention, the electrical conductor is configured such that the curved region extends approximately parallel to the base plate of the brush holder component. The free end of the conductor extends in the axial direction approximately parallel to the connecting element of the tamper-resistant component in a curved manner thereon. In order to reliably bring the connecting element into electrical contact with the free end of the conductor in a narrow spatial relationship, an axial through-hole is formed in a curved region extending transversely to the connecting element. For example, the axial through-holes are punched simultaneously with the punching of the (ausstanzen) conductor. The axial bore has a larger diameter than the diameter of the connecting cable so that the latter can deflect within the bore transversely to the axial direction. The connection cable can thereby be pressed against a flat soldering surface which extends in the axial direction over the free end of the conductor.

The electrical conductors can be inserted in a very simple manner into a plug module which is embodied as an injection molded part. For this purpose, a fastening region is formed on the conductor element, said fastening region having, for example, a latching hook. Advantageously, the fastening region is pressed into the conductor receptacle of the plug module, so that it is reliably fastened in the plug module. Alternatively, the conductors can also be injection molded as inserts with a plug module (umgiessen).

The conductor further has a contact element, which is connected to an external current supply. Such contact elements can be configured, for example, directly as plug pins in a plug collar into which a corresponding external plug for supplying current can be inserted. In an alternative embodiment, the contact element can also be configured as a plug-in connection in the interior region of the motor housing of the electric machine, for example, a corresponding plug-in element of the plug-in electronics being plugged in or plugged into the plug-in connection. For this purpose, fork contacts are formed, for example, on plug-in electronics, which are pushed onto contact elements, which are formed, for example, as contact tongues. The plug-in electronics are preferably inserted into the motor housing transversely to the rotor shaft. This has the following advantages: different plug-in electronics may be combined with the motor.

It is particularly advantageous if the brush holder component is designed as a standard part, which is always identically configured for different electric machines. In this case, the brush holder with the carbon brushes is arranged in the brush holder component and the interference-free component is likewise electrically connected directly to the brush holder. The brush holder component is preferably inserted into the open pole housing in the axial direction, so that it is arranged completely in the radial direction within the pole housing. In order to construct the electric motor module component, different plug modules can now be placed axially on the brush holder component and electrically connected thereto. In this case, both the brush holder component and the plug module have a central recess through which the rotor shaft passes in the axial direction. Thereafter, a gear housing is axially mounted to the plug module, in which gear housing the torque of the rotor shaft is transmitted to the driven element. The plug module is preferably arranged in an axial direction in a sandwich-type configuration and is fixed between the pole housing and the transmission housing. Depending on the design of the plug module, its outer circumferential region may form part of the outer wall of the motor housing. The plug module and/or the gear housing can be configured as an electronics housing, into which, for example, the plug-in electronics can be plugged in the radial direction.

Such an electric machine according to the invention can be manufactured very advantageously in terms of process technology and on the other hand can be produced very flexibly using the manufacturing method according to the invention. In this case, the brush holder, in particular the two brush holders, and the interference-resistant component, in particular the two interference-resistant components, are initially inserted axially into the open side (offene Seite) of the brush holder component and mechanically fixed. In the axial installation of the tamper-resistant component, the connecting element thereof is positioned in the through-hole by the base plate in such a way that it is sufficiently spaced from the surrounding edge of the through-hole. Thereafter, the plug module is placed onto the brush holder component in the axial direction, so that the electrical conductors of the plug module are arranged adjacent to the free ends of the connecting elements. In order to form the soldering contact, the connecting element is pressed by the soldering pliers directly onto the flat soldering surface of the conductor and soldered to it. The through-hole is advantageously so large that the connecting element does not contact the inner surrounding edge of the through-hole during the soldering process and has such a large radial distance from it that the base plate of the brush holder component does not melt. In this case, it is particularly advantageous if the through-holes are configured approximately in the form of a triangle, since the connection cables, which are preferably of circular configuration, are then arranged in the region of the corners before the plug module is installed and are moved after the plug module has been installed toward the conductors and toward the straight sides of the triangle, which in particular extend approximately parallel to the flat soldering surfaces of the conductors. In this way, the connection cable is reliably secured against the welding surface, rather than being brought into contact with the surrounding edge of the through-hole. Manufacturing tolerances and assembly tolerances of the individual components can thus advantageously be compensated for, and a stress-free welded connection can be produced.

The brush holder according to the invention is particularly preferably mounted in an electric motor, which is embodied, for example, as an adjusting motor for movable components in a motor vehicle, for example, for adjusting window panes, sliding roofs or seat parts. The brush holder is fitted into a brush holder component which can be designed as a standardized, permanent part of the electric machine. A plug module is then plugged in, which can be adapted to the user-specific requirements. In this case, the comparatively complex tolerance-sensitive brush holder system is not dependent on the installation of the plug module, so that it is not necessary to redesign the complex brush holder system every time in order to adapt the motor to the user requirements. In this case, it is particularly advantageous if the plug module is inserted directly into the pole housing, without being influenced by manufacturing tolerances of the brush holder component.

Drawings

The invention is explained in more detail in the following description with the aid of embodiments shown in the drawings. Wherein:

fig. 1 shows an overall view of an electric machine according to a first embodiment;

FIG. 2 shows a brush holder-member mounted in a pole housing;

FIG. 3 illustrates another embodiment of a brush holder-member;

fig. 4-6 show detail views of different designs for connecting tamper-resistant components with different plug modules.

Detailed Description

Fig. 1 shows an electric motor 10, as is used for adjusting a movable component in a motor vehicle, preferably a window pane, a sliding roof or a seat assembly. In this case, the stator 13 is arranged in the pole housing 12, the rotor 15 is arranged in the stator, and the rotor shaft 20 of the rotor extends in the axial direction 24 from the pole housing 12 into the axially adjoining gear housing 14. In this case, the drive torque is transmitted from the rotor shaft 20 to a transmission arranged in the transmission housing 14, which has a driven element 22 which interacts with a mechanism, not shown, for example, a component of a vehicle seat or window glass in a motor vehicle. In the axial direction 24, a plug module 16 is arranged between the pole housing 12 and the gear housing 14, which plug module is electrically connected to the brush holder component 17 for electrical contact of a commutator 55 arranged on the rotor shaft 20. The brushes are here embodied as hammer brushes 27, whose carbon brushes 26 are each arranged at a first end 51 of the spring arm 50. The opposite second end 52 of the spring arm 50 is fixed to the brush-holder member 17 such that the hammer brushes 27 are resiliently pressed against the commutator 55. The plug module 16 has a connection plug 18 which is arranged radially outside the pole housing 12 with respect to the rotor shaft 20 in a radial direction 23 and preferably also radially outside the gear housing 14. The connector plug 18 is connected to the plug module 16 by means of radial webs 30. The brush holder component 17 is produced separately from the plug module 16, for example, and is arranged radially completely within the pole housing 12. The plug module 16 has a base plate 32 with a central recess 34 through which the rotor shaft 20 extends into the gear housing 14 in the axial direction 24. The connector plug 18 has a plug collar (Steckerkragen) 40, in which a connector pin 42 is arranged for electrical contact of the motor 10. Alternatively, a sensor magnet 104 may be arranged on the rotor shaft 20, which sensor magnet provides a signal for the rotor position on the sensor pin 43 via a rotational speed sensor 105. In the embodiment of fig. 1, the plug collar 40 extends with a connecting pin 42 and an optional sensor pin 43 in the axial direction 24, so that a corresponding plug can be inserted into the plug collar 40 also in the axial direction 24. As can be seen from fig. 1, the plug module 16 is clamped in the axial direction between the two

flanges

94, 92 of the pole housing 12 and of the gear housing 14, wherein the outer circumferential edge 44 of the plug module 16 in this exemplary embodiment simultaneously forms part of the outer wall 45 of the electric machine 10. For example, the gear housing 14 is connected to the pole housing 12 by means of bolts or other connecting elements 48, whereby the plug module 16 is firmly tensioned (verspannen) and fixed between the pole housing 12 and the gear housing 14. For this purpose, the connecting element 48 engages through a screw hole 91 in a flange 94 of the pole housing 12 into a corresponding mating receptacle 90 in the gear housing 14.

In fig. 2, a further embodiment of the motor 10 is shown, wherein a brush holder component 17 is coupled to the rotor 15 in the pole housing 12. The brush holder component 17 is inserted into the pole housing 12 to a large extent in the axial direction 24, so that it is closed approximately in the axial direction by the flange 94 of the pole housing 12. The brush holder component 17 is surrounded by the pole housing wall 60 over its entire circumference. Disposed within the brush holder component 17 is a hammer brush 27 which bears radially against a commutator 55 which is secured to the rotor shaft 20 in a rotationally fixed manner. Commutator 55 is connected to windings 56 of rotor 15 such that energized rotor 15 rotates in the magnetic field of stator magnets 62. The brush holder component 17 has a positioning surface 67 on its outer circumference, which centers the brush holder component 17 in the radial direction in the pole housing 12 (zentrieren), so that the hammer brushes 27 are precisely positioned relative to the commutator 55. The positioning surface 67 bears radially directly against the inner side 77 of the pole housing wall 60. The positioning surface 67 extends over a large part of the axial extension 72 of the brush holder component 17 in order to prevent tilting thereof in the pole housing 12. In the exemplary embodiment, the pole housing 12 has an oblate circular cross section, so that the pole housing wall 60 has a circular segmented section 75 and two parallel, opposite sections 76. The brush holder component 17 is respectively attached with at least one positioning surface 67, preferably with two positioning surfaces 67, to one of the four mentioned

sections

75, 76 of the pole housing wall 60. The brush holder component 17 is preferably secured in the pole housing 12 by means of a force fit by means of radial centering by axial pressing in of the positioning surface 67. In this case, an axial stop 97 is formed on the pole housing 12, against which the brush holder component 17 bears in the axial direction. The axial stop 97 can be formed on the inner wall 77 or in the region of the flange 94. The brush holder component 17 has an axial recess 80 on the outer circumference 64, into which the axial projection 11 formed thereon engages in the axial direction when the plug module 16 is mounted. The axial recess 80 of the brush holder component 17 is arranged in each of the four

segments

75, 76 of the pole housing wall 60. For example, two diametrically opposed axial recesses 80 extend over the entire axial extension 72 of the brush holder component 17. However, two further diametrically opposed axial recesses 80 extend only over a partial region of the axial extension 72. Formed in the middle of the brush-holder element 17 is a central column (Rohrstumpf) 36 which accommodates a bearing 38 for the rotor shaft 20. The tubular string 36 has a circumferential wall in the tangential direction 25. For example, the bearing 38 of the rotor shaft 20 is pressed into the tubular string 36. The commutator 55 is thereby positioned precisely on the rotor shaft 20 relative to the carbon brushes 26. The brush-holder member 17 has a first axial side 31 and a second axial side 33 on both sides of the base plate 32. A notch 96 is formed in the base plate 32 in the axial direction 24 for axially threading the stator 101 of the brush holder 19. And then bent at a bending angle for firmly fixing the brush holder 17 in the brush-holder-member 17. For this purpose, recesses 116 are formed in the stator 101, for example, which reduce the material cross section of the stator 101. Whereby it can be bent with a smaller force and a smaller radius. The brush holder 19 is in electrical contact with an anti-interference component 9, in particular an anti-interference choke 99, which is likewise arranged in the brush holder component 17. The tamper-resistant component 9 is inserted into the pocket-like receptacle 106 in the circumferential wall 44, wherein the connecting element 107 of the tamper-resistant component 9 is arranged on the bottom face 66 of the receptacle 106 through a through-hole 108 in the base plate 32. The connecting element 107 extends here as a choke cable end 122 in the axial direction 24 and is in electrical contact with the electrical conductors 110 of the plug module 16 in a further production step. The through hole 108 has a larger diameter than the diameter of the connecting element 107, so that the connecting element does not contact the circumferential edge 109 of the through hole 108. This prevents the circumferential edge 109 from melting during the welding of the connecting element 107 to the conductors 110 of the plug module 16. Furthermore, the position of the connection element 107 may be adapted to the exact position of the conductor 110.

In fig. 3, a further brush holder component 17 is shown, into which two brush holders 19 are inserted and fixed on the inner side 31. Such a brush holder component 17 may be inserted into the pole housing 12 via the rotor 15 according to fig. 2. Here, the rotor shaft 20 passes through a central recess 34 in a (durchdringen) pipe string 36. Fig. 3 schematically shows a commutator 55, against which the carbon brushes 26 rest in the radial direction, in the interior of the brush holder component 17. The two brush holders 19 are inserted in the axial direction 24 through axial recesses 96 in the base plate 32 of the brush holder component 17. In fig. 3, the fixing piece 101 is bent approximately at right angles such that the free end of the fixing piece 101 extends along the base plate 32 on the upper side 33. In this embodiment, a recess (veriefung) 121 is formed for this purpose on the upper side 33 of the base plate 32, in which recess the free end of the fixing piece 101 is accommodated. A recess 116 is formed in the fixing piece 101 such that bent tabs 120 are arranged at both sides of the recess 116. By means of the recess 116, the material cross section of the fixing piece 101 is reduced to the material cross section of the two bending tabs 120, so that the fixing piece 101 can be bent more easily and can be pressed (Anschmiegen) against the base plate 32 more simply with a narrower bending radius. Thus, the brush holder 19 can be prevented from being separated from the notch 96 (Losl fosen). In this embodiment, the curved free end of the fixing piece 101 is substantially closed with the surface of the base plate 32 of the brush holder-member 17. Thus, the securing piece 101 does not interfere when the plug module 16 is subsequently placed on the brush holder component 17 in the axial direction. In the brush holder component 17, a plurality of axial recesses 80 for the respective axial projections 11 of the plug module 16 are cut out (ausschneiden). The spring arm 50, which is connected to the contact element 59, on which the securing tab 101 is formed, can be recognized through the recess 80. In the axial direction 24, opposite the securing piece 101, the contact piece 100 is formed on the contact element 59. The contact lug 100 has a fork 102, into which the first choke cable end 98 of the choke coil 99 is inserted as a connecting cable 98. The choke 99 is inserted here adjacent to the contact element 59 into a corresponding pocket-like receptacle 106 in the brush holder component 17. The choke 99 has as second choke wire end 122 a straight wire end which protrudes as connecting element 107 in the axial direction 24 through a through-hole 108 in the base plate 32 of the brush holder component 17. The through-hole 108 is configured approximately in the shape of a keyhole, whereby the connecting element 107 is not arranged centrally in the circumferential hole 108 before contact with the conductor 110. Since the first choke cable end 98 is electrically connected to the brush holder 19, the second choke cable end 122 forms an electrical connection for the supply of current to the outside of the carbon brush 26. For example, the second choke cable end 122 is soldered to the conductor element 110 of the plug module 16, which is connected to the external connecting pin 42 or the internal contact tab 81.

Fig. 4 shows a detail according to fig. 2 or 3, in which the plug module 16 has been placed onto the brush holder component 17 in the axial direction 24. On the plug module 16, electrical conductors 110 are arranged, the ends of which have solder pads 111 extending approximately parallel to the connection element 107. The plug module 16 is preferably likewise formed as a plastic injection molding, wherein the electrical conductors 110 are inserted into corresponding conductor receptacles 112 of the plug module 16 by means of the fastening regions 114. In this embodiment, the through-holes 108 for the connecting elements 107 are configured approximately in the shape of triangles. All three corners have an inner radius 113 along the circumferential edge 109, which is in particular about 0.4-0.5. 0.5 mm. In the starting position before welding, the connecting element 107 is arranged without contact in the region of the rounded corner. The solder pads 111 of the conductor 110 extend substantially along the triangular base surface 118 opposite the connection elements 107 located in the region of the corner. For welding the connecting element 107, the connecting element can therefore be bent over the conductor 110 until the connecting element 107 rests against the conductor 110. In the "welded-in position" of the connecting element 107, said connecting element is still always spaced apart from the circumferential edge 109 in all directions and is preferably located in the middle region of the triangular through-opening 108. If the connection element 107 is now fixedly welded to the weld-pad 111 of the conductor 110, the circumferential edge 109 will not melt due to the heat input. Thereby, a stress-free soldered connection between the connection element 107 and the conductor 110 can be constructed. The connecting element 107 has a diameter of, for example, 0.6-0.7. 0.7 mm, wherein the dimension from the base surface 118 to the oppositely disposed corner is then approximately 1.5-2.5 mm. The through-hole 108 is preferably not configured as an equilateral triangle, but the connecting element 107 is arranged in a corner section having an angle of about 30-45 ° prior to the fixing weld. In the embodiment according to fig. 4, the plug module 16 has a recess 115 in which the through-hole 108 is arranged. In this embodiment, the conductor 110 is connected to a connecting pin 42, which is arranged axially outside the pole housing 12 in the plug collar 40, for example, according to fig. 1.

Another embodiment is shown in fig. 5, wherein the plug module 116 is configured to receive an electronics-plug-in module. The conductor 110 has a contact tab 81, which is arranged radially inside the pole housing 12. Such contact webs 81 can be configured, for example, with plug-in connections having plug-in modules. For this purpose, for example, fork contacts (gablkontakt) are formed on the insert module, which enclose the contact webs 81. The electrical conductor 110 is in turn clamped in its fastening region 114 into a conductor receptacle 112 of the electronic module (elektronikmodule) 16 and is thus firmly fastened in the electronic module 16. The conductor 110 also has a solder pad 111 which extends along the connecting element 107 in the axial direction 24. In this design, however, conductor 110 is configured to bend for space reasons such that bent region 83 extends generally along substrate 32. In this curved region 83, a hole 85 is cut through which the connecting element 107 passes through the curved region 83 in the axial direction 24. The plug module 16 in turn has a recess 115 in which the curved region 83 is arranged directly on the base plate 32 having the through-opening 108. The hole 85 extends as far as the solder-pad 111 so that the connecting element 107 can be bent so far onto the solder-pad 111 that it rests against said solder-pad.

Fig. 6 shows a welding jaw 86 which, according to the arrangement in fig. 5, welds a connecting element 107 to a weld pad 111 of a conductor 110. In this case, the connecting element 107 is bent transversely to the axial direction 24 toward the soldering pad 111 and soldered thereto when the welding tongs 86 are clamped. In fig. 6 a cross section is shown transversely through the through hole 108, from which it can be seen that the connecting element 107 does not contact the circumferential edge 109. The through-hole 108 has a bevel 87 on at least one side in the axial direction 24, which facilitates the insertion of the connecting element 107 into the through-hole 108. The inclined surface 87 may be configured, for example, as a cone (Konus) extending over a part of the circumference or the entire circumference of the through-hole 108. In fig. 6, the through hole 108 has a step (Stufe) 89. The steps 89 are formed in the wall region 88 of the pocket-like receptacle 106 for the tamper-evident component 9. The interference-resistant component 9 is embodied here as an interference-resistant choke 99, the second choke cable end 122 of which is guided along the wall region 88 along the edge region of the pocket 106 through the through-opening 108. On the one hand, the connection element 107 is made easier to insert into the through hole 108 by the step 89 and the bevel 87. On the other hand, it is ensured that in the inserted state, even when it is applied against the weld-pad 111, there is still a sufficient spacing from the circumferential edge 109. For example, a ferrite core (Ferritkern) 95 glued into the choke 99 is formed in the choke 99. The choke 99 is clamped in the pocket 106 by means of a compression rib (pressfitting). The plug module 16 according to fig. 5 and 6 has a circumferential edge 44, which is sealed both from the pole housing 12 and from the gear housing 14. The circumferential edge 44 preferably rests on the one hand against a flange 94 of the pole housing 12 and on the other hand against a flange 92 of the gear housing. In this embodiment, the conductor 110 and the curved region 83 are completely formed in the pole housing 12 in a very compact manner in the radial direction. In a preferred embodiment, both two brush holders 19 and two choke coils 99 are arranged in the brush holder component 17, which are each connected to a contact tab 81 for external current supply. After the connecting element 107 has been welded to the plug module 16, the gear housing 14 is then placed axially on the plug module 16 and connected to the pole housing 12, for example.

It should be noted that various combinations of features with each other are possible with respect to the embodiments shown in the drawings and in the description. For example, the shape of the conductors 110 and their solder pads 111 may thus vary from one plug module 16 to another. The specific shape of the through hole 109 and the chamfer 87 and the step 89 and the spacing 117 of the connection element 107 relative to the surrounding edge 109 can likewise be adapted to the cross section of the connection element 107 and the type of soldered connection with the conductor 110. As an alternative to the connection to the contact element 100, the choke cable end 98 can also be welded directly to the spring plate of the spring arm 50 opposite the fastening surface 57. Preferably, the electric machine 10 is used as an adjustment drive in a transmission drive unit of a motor vehicle, for example for adjusting movable components, such as a window pane, a seat assembly, a sliding roof or a drive assembly in a motor space, but is not limited to these applications.

Claims

1. A brush holder component (17) having a brush holder (19) for electrical contact of a commutator (55) of an electric machine (10), wherein the brush holder component (17) has a base plate (32) extending transversely to a rotor shaft (20), which has a recess (34) for the center of the rotor shaft (20), wherein at least one electrical carbon brush (26) for contact with the commutator (55) is arranged in the brush holder (19) and at least one interference-resistant component (9) is arranged on a first axial side (31) of the base plate (32), and an electrical connection element (107) of the interference-resistant component (9) is guided through a through-hole (108) in the base plate (32) having a wrapping edge (109) to an opposite axial side (33) of the base plate (32), wherein the connection element (107) is arranged spaced apart from the wrapping edge (109) in all directions in a plane transverse to the rotor shaft (20).

2. The brush holder member (17) according to claim 1, wherein the through hole (108) has a substantially triangular shape.

3. The brush holder member (17) according to claim 2, wherein the substantially triangular shape has rounded corners (113).

4. A brush holder member (17) according to claim 1, 2 or 3, characterized in that the minimum spacing (117) between the connecting element (107) and the wrapping edge (109) is at least 0.1mm in the state in which the connecting element (107) is fixedly welded.

5. A brush holder member (17) according to any one of claims 1-3, characterized in that the through hole (108) has a tapering taper in the axial direction (24) in a direction towards an opposite axial side (33) of the base plate (32).

6. The brush holder member (17) according to claim 5, characterized in that the steps (89) are configured in a wall region (88) of the pocket-like receptacle (106).

7. A brush holder member (17) according to any one of claims 1 to 3, characterized in that the tamper resistant member (9) is arranged in a pocket-like receptacle (106), a bottom face (66) of which is formed by the base plate (32), and the through hole (108) is configured on the bottom face (66) of the pocket-like receptacle (106).

8. A brush holder member (17) according to any one of claims 1-3, characterized in that the tamper resistant member (9) is configured as a tamper resistant choke (99) and the connecting element (107) is configured as a rounded choke cable end (122).

9. A brush holder member (17) according to any one of claims 1-3, characterized in that the tamper resistant member (9) is electrically connected to the contact piece (100) of the brush holder (19) at its side facing away from the base plate (32) by welding.

10. A brush holder member (17) according to any one of claims 1 to 3, characterized in that the brush holder (19) has a spring arm (50) on a first end of which the carbon brush (26) is fixed and on an opposite second end (52) the spring arm (50) is fixed to the brush holder member (17) with a fixing tab (101), wherein the fixing tab (101) is inserted through a cutout (96) in the brush holder member (17) and then bent in order to form a form-fit with the brush holder member (17).

11. An electric machine (10) having a brush holder member (17) according to any one of claims 1 to 10, wherein a plug module (16) is placed axially onto the brush holder member (17), the plug module having at least one electrical conductor (110) which is in electrical contact with a connection element (107) of the tamper resistant member (9).

12. The electric machine (10) of claim 11, wherein the electrical conductor (110) is configured as a stamped bent piece.

13. The electrical machine (10) according to claim 11, characterized in that the electrical conductor (110) has a flat soldering pad (111) extending in an axial direction (24) substantially along the connecting element (107) and soldered thereto.

14. The electrical machine (10) of claim 13, wherein the electrical conductor (110) has a curved region (83) relative to the bond pad (111), the curved region extending along the base plate (32) and an axial bore (85) being configured in the curved region (83), the connecting element (107) protruding through the axial bore for connection with the bond pad (111).

15. The electrical machine (10) according to claim 11, characterized in that the electrical conductor (110) has a fastening region (114), with which the conductor (110) is accommodated in a conductor receptacle (112) of the plug module (16), and in that the conductor (110) has contact elements (42, 81) for an external current supply for a plug connection.

16. The electric machine (10) according to claim 15, characterized in that the contact element (42) is arranged in an external plug collar (40) and is configured as a plug pin (42), and/or the contact element (81) is configured as a contact tab (81) for contacting the interior of a plug-in electronic device.

17. The electric machine (10) according to claim 11, characterized in that the brush holder member (17) is manufactured as a plastic injection-molded part and is arranged radially in a metallic pole housing (12) of the electric machine (10), and that a separately manufactured plug module (16) is arranged axially between the pole housing (12) and a gear housing (14), into which the rotor shaft (20) protrudes.

18. The electrical machine (10) of claim 17, wherein the plug module (16) is directly radially against an inner wall (77) of the pole housing (12).

19. Method for manufacturing an electrical machine (10) according to any one of claims 11 to 18, having the steps of:

-inserting the tamper resistant member (9) and the brush holder (19) into the brush holder member (17) and electrically connecting each other;

-upon access to the tamper resistant member (9), its connection element (107) is plugged through a through hole (108) in a base plate (32) of the brush holder member (17) and positioned contactlessly with respect to a surrounding edge (109) of the through hole (108);

-a plug module (16) with an electrical conductor (110) is joined to the brush holder member (17) and the connecting element (107) is arranged on a soldering pad (111) of the conductor (110);

-welding the connection element (107) with the conductor (110).

20. The method according to claim 19, characterized in that the connecting element (107) is bent from a corner (113) of the through hole (108) towards an oppositely arranged base (118) of a triangular shape when being placed onto the soldering pad (111).