Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/40—Structural association with grounding devices
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/30—Structural association with control circuits or drive circuits
  • H02K11/33—Drive circuits, e.g. power electronics
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
  • H02K2211/03—Machines characterised by circuit boards, e.g. pcb
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/08—Structural association with bearings
  • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor

Definitions

• Electric drive unit with a pole housing and an electronics housing
• the invention relates to an electric drive unit with a pole housing and an electronics housing and a method for producing such a unit according to the preamble of the independent claims.
• an electrical machine which has a pole pot made of metal.
• a plug component made of plastic is arranged axially, on which a cover made of electrically conductive material is in turn arranged.
• the cover with the pole pot is braced by several steel spring clips so that the three components are fixed against each other.
• the steel spring clips with the pole housing and the metal cover act as EMC shielding, which shields radiation from interfering electromagnetic waves.
• the assembly of such external Matallfe countries is relatively complex and space-consuming.
• a shielding plate can be arranged around the connector component, which is electrically connected to the cover and / or the pole pot.
• the production and assembly of such a shielding plate also represents a considerable additional expense.
• a drive unit has become known from DE 10 2017 207 165 A1 in which contact elements are integrated in the interior of an electronics housing in order to connect the electronics housing to the electrical ground of the pole housing.
• the electric drive unit according to the invention with the features of the independent claims has the advantage that for a reliable ground connection of the circuit board and / or the electronics housing to the pole housing, the ground pins are pressed radially against the inside of the pole housing with an additional spring force.
• This resilient contact pressure is applied by a separately manufactured contact pressure element, which ensures reliable ground contact between the ground pins and the pole housing over the entire service life and over large temperature ranges and at high shaking loads.
• the pressure element prevents the formation of oxide at the contact point - and thus reduces the contact resistance.
• the pressing element By designing the pressing element as a circumferential ring, this separately manufactured component can simultaneously press all ground pins radially outwards against the inner wall of the pole housing.
• the radial contact forces can be well balanced by the ring-shaped design.
• the ring-shaped pressure element can be inserted axially onto the electronics housing part or into the pole housing in a simple manner - in particular pressed in.
• the ring is particularly advantageously formed on the radial inside of the pressing element, so that the pressing element can be placed on a cylinder jacket.
• the circumferential surface of the bearing seat for the rotor shaft which is formed in one piece with the end shield, and extends in the axial direction.
• the pressing element can be pressed axially onto the radially outer circumferential surface of the bearing seat before the mounting of the bearing cover, whereby the pressing element is securely fixed.
• latching elements such as a speed groove, can also be formed on the inner ring, which when pushed onto the circumferential surface of the load gersitz claw at this.
• the pressing element can also be placed on another axial extension of the electronics housing part or the stator within the pole housing.
• individual radial webs preferably extend outwards, which then rest with their radially outer ends on the ground pins and / or the peripheral wall of the pole housing.
• the radial webs can be designed to be springy, so that the radial ends of the radial webs exert a radial spring force on the ground pins and / or the circumferential wall of the Polgecher ses.
• the individual ground pins are electrically connected to one another. By connecting the individual ground pins in parallel, the total resistance between the pole housing and the contact elements can be reduced considerably. If further radial webs of the pressing element are also in direct contact with the inner wall of the pole housing, the electrical contact resistance is thereby further reduced overall.
• a more targeted contact surface can be realized towards the ground pins and the pole housing.
• a high surface pressure can be achieved between the ground pins and the pole housing.
• receptacles for the ground pins can be formed at the radial outer ends in order to guide the latter more securely and to prevent the radial webs from slipping off the ground pins.
• arcuate compensating elements can be formed in a simple manner at the radially outer ends, to which the contact surfaces for the ground pins or for the peripheral wall adjoin. With these curved compensating elements, the contact surfaces act as axial spring tongues that can compensate for radial tolerances over a wide temperature range and even when there are large external vibrations.
• a press-on element can be manufactured particularly inexpensively as a bent stamped part from sheet metal, with the material properties with regard to the electrical line and the spring force to be applied being able to be optimized.
• the inner ring is punched out as an uninterrupted closed ring, it can be used directly for a press fit for a corresponding cylinder jacket-shaped receptacle.
• the inner ring can be designed directly as a speed groove ring which, for example, can be pressed directly onto the radial outer surface of the bearing seat.
• the pressing element has four or five or more radial webs, of which, for example, two or three rest on a corresponding ground pin. The remaining radial webs are then directly on the inner wall of the pole housing in order to form an electrical parallel circuit to the ground pins.
• the ground pins are connected to the contact elements, preferably made in one piece with them.
• the con tact elements are then electrically connected to the circuit board and / or to the second electronics housing part in order to form an electromagnetic shield.
• At least one electronics board for controlling the drive unit is arranged inside the electronics housing. To suppress interference on this electronic board, it is connected to at least one ground pin via at least one contact element.
• a metal cover of the electronics housing can be electrically connected to the circuit board and / or the ground pin via further contact elements.
• electrical contact is made directly with the at least one contact element, so that the circuit board is electrically suppressed.
• electrical contact can be made with an additional contact element or with the circuit board.
• the entire housing can be designed as an EMC shield for the electric drive unit in a very simple manner, without additional assembly processes.
• the contact elements can be are preferably designed as insert parts which are inserted into the mold during the injection molding of the first plastic housing part in order to then be injected with the plastic of the housing wall at least at the fastening areas.
• the contact elements are fixed in one work step with the production of the first housing part, the ground pins preferably being formed in one piece with the free ends of the contact elements.
• separately manufactured ground pins can be connected to the contact elements by a welded or soldered connection, by hot stacking or by means of an insulation displacement connection (SCV) - and in particular in one work step with the contacting of the coil wire ends with the corresponding Conductor elements of the interconnection plate are carried out.
• SCV insulation displacement connection
• receptacles for the ground pins are formed on the outer radial ends of the pressing element. It can be cut from savings in the spring tongues into which the ground pins engage radially.
• sleeve-shaped receptacles are arranged at the radially outer ends, which receive the ground pin, for example as a cable lug or speed groove.
• the ground pin preferably has a rectangular cross section, but can also be round or keel-shaped. After axially inserting the ground pin into the sleeve-shaped receptacle, the ground pin is pressed radially outward against the inner wall of the pole housing by the resilient pressure force.
• the sleeve-shaped receptacle In the case of the embodiment with the sleeve-shaped receptacle, it is preferably in direct radial contact with the inner wall of the pole housing in order to produce a highly conductive electrical contact.
• the ground pin is completely enclosed transversely to the axial direction by the sleeve-shaped receptacle, so that good electrical contact between the receptacle sleeve and the ground pin is formed. In such an embodiment, for example, the ground pin does not lie directly on the inner wall of the pole housing.
• the sleeve-shaped receptacle as a cable lug or speed groove
• these can be made from a different material than the ground pins, which means that the material properties can be optimized for friction contact and contact resistance to the pole housing can be optimized.
• the speed nuts or the cable lugs can be manufactured as separate components, which are subsequently attached to the radial webs of the pressing element.
• the radial webs can be made from different materials than the sleeve-shaped receptacles, and their spring properties can be optimized.
• the cable lugs or the speed nuts are preferably made of copper or aluminum in order to ensure high electrical conductivity and good contact with the pole housing.
• the ground pins can be pressed securely against the inner wall of the pole housing over a short radial path.
• the pressing element is designed, for example, as a plastic ring, the inside of which rests radially on the axial extensions of the insulating mask, whereas the outer circumference of the pressing element rests radially on the ground pins. Since the pressing element is designed as a plastic ring, for example, which is wedge-shaped in the axial direction. The plastic material has an elasticity that causes a radial contact pressure on the ground pins.
• the pole housing in a preferred embodiment has a first radial step which has a larger diameter than the second radial step.
• a circular, axial extension of the electronics housing engages in the pole housing in order to seal it tightly to the outside.
• the ring seal is preferably arranged between the electronics housing and the pole housing.
• a bearing seat for mounting the rotor is formed from a manufacturing point of view.
• the housing wall is preferably produced as a bearing plate made of plastic by means of injection molding, with a ball bearing, for example, being used in the bearing seat, which takes up the rotor shaft.
• the rotor shaft preferably protrudes axially through the rotor bearing into the interior of the electronics housing.
• the free ends of the stator coils are passed through axial holes in the housing wall of the electronics housing in order to be contacted with the interconnection plate. Both the through openings for the ground pins and the holes for the coils wire ends radially within a sealing ring which is arranged between the pole housing and the electronics housing.
• the second housing part is designed as a heat sink for the electric drive unit
• electronic components can be arranged in the interior of the first housing part directly in thermal contact with the inside of the housing cover.
• the contact elements can also serve as heat conductors at the same time.
• the housing cover is cast from aluminum, for example, or deep-drawn as sheet metal. The heat generated by the electronics can be quickly released via the cooling fins formed on the outside.
• the first electronics housing part made of plastic is arranged according to a sandwich construction between the housing cover and the pole housing made of metal. Its connector preferably extends away from the rotor shaft in the radial direction.
• a signal transmitter can advantageously be arranged at one end of the rotor shaft, which works together with a corresponding sensor of the electronics unit.
• the rotor position can be detected by the electronics unit, for example to control the electronic commutation of the electric motor or to determine the rotational speed of the rotor shaft or the position of a part driven by the rotor shaft.
• the signal transmitter emits signals in the axial direction that can be detected by an axially directly opposite sensor element.
• the sensor element is arranged directly on the circuit board, which can for example detect the orientation of a magnetic field.
• a through opening can be formed in the bottom of the pole pot on the opposite side of the pole pot, through which the rotor shaft protrudes to the outside.
• an output element can be formed or arranged on the second free axial end of the rotor shaft, which, for example, adjusts a movable part in the motor vehicle or drives a pump or fan.
• the pressing element can be pressed axially onto the bearing receptacle before the assembly of the first electronics housing part, and then placed axially onto the open pole housing together with the first electronics housing part.
• the ground pins are inserted axially along the inside of the pole housing, the pressing element simultaneously pressing the ground pins radially outward against the pole housing during axial insertion.
• the ground pins are reliably in contact with the radially outer ends of the pressing element, before they are then blindly joined into the pole housing.
• the separately manufactured pressing element can be installed in one process step with the assembly of the first electronics housing part on the pole housing.
• Fig. 1 shows a first embodiment of an electrical according to the invention
• 5 and 6 show two further exemplary embodiments of an electric drive unit according to the invention.
• an electric drive unit 10 which is designed as an electric motor 9 with a housing 11.
• a stator 60 having a plurality of stator poles is arranged in a pole housing 12 of the housing 11 and cooperates with a rotor 62 arranged on a rotor axis 20.
• the Polgefeldu se 12 is a motor housing made of metal, in which stator poles are received.
• the stator poles each have, for example, a T-shaped lamellar base body for receiving electrical coils 76, the magnetic
• the return path runs in the circumferential direction 21 over the lamellar base body. The magnetic return does not therefore have to run over the pole housing 12.
• the pole housing is preferably made of steel as a deep-drawn part.
• the rotor 62 has a rotor shaft 64 on which a rotor body 66 is arranged, which is preferably composed of individual laminations 67 before.
• the rotor shaft 64 is mounted on the base 14 of the pole housing 12 by means of a first bearing 68.
• the pole housing 12 has an axial extension 16 which is designed as a bearing seat for the first bearing 68.
• the Polge housing 12 is designed as a pole pot 13, which is Herge, for example, as a deep-drawn part.
• the rotor shaft 64 protrudes with a second axial end 63 through an opening 70 of the pole housing 12 from the latter in order to transmit a torque of the electric motor 9 to a gear or pump or fan, not shown in detail.
• the opening 70 is formed on the axial extension 16, an output element 74 being arranged on the rotor shaft 64 outside of the pole housing 12, or being formed on the rotor shaft 64.
• the pole housing 12 consists of metal and is optionally designed as a magnetic yoke for the electromagnetic poles of the stator 60.
• the electric coils 76 are arranged on stator teeth in the stator 60 in the ra-media outer region of the pole housing 12, which generate a magnetic field to set permanent magnets 78 in rotation in the rotor 62.
• the pole housing 12 is formed in this embodiment as an approximately cylindrical pole pot 13, which is axially open.
• a bearing plate 50 is arranged, in which a second bearing 58 of the rotor shaft 64 is attached.
• the end shield 50 is, for example, part of a first axial housing part 31 of an electronics housing 30 made of plastic. The first housing part 31 is inserted with the end shield 50 at the open edge 81 of the pole housing 12.
• a wiring device 77 is arranged in the first housing part 31, which connects the individual coils 76 with one another and forms electrical phase connections 75 in the electronics housing 30.
• the pole housing 12 with the rotor 62 completely supported therein represents a preassembled structural unit 18 to which the first axial housing component 31 can be axially flanged. This is on the open Edge 81 of the pole housing 12 is formed with a flange 22 on which the electronics housing 30 rests axially in the exemplary embodiment, which is composed of the first axial housing part 31 and a second axial housing part 32.
• the pole housing 12 and the electronics housing 30 together form the housing 11 of the drive unit 10.
• the first axial housing part 31 rests axially on the pole housing 12.
• the first axial housing part 31 has a cylindrical extension 26 which engages axially in the pole housing 12.
• a first radial step 108 is formed on the open edge 81 of the pole housing 12, which is followed in the axial direction 25 by a cylindrical circumferential wall 23 on which a ground pin 115 rests.
• a sealing ring 24 is arranged, with which the pole housing 12 is sealed against the Elektronikgephase se 30.
• the open edge 81 and the cylindrical axial extension 26 are approximately circular, the base surface of the first axial housing part 31 being approximately rectangular in a plan view corresponding to FIG.
• the first axial housing part 31 has, on the side facing away from the Polge housing 12 axially, a mounting opening 40 which is completely closed by the second axial housing part 32.
• the electronics housing 30 has a parting plane 34 transverse to the rotor axis 20, on which the two separately manufactured axial housing parts 31, 32 are connected to one another.
• the first axial housing part 31 axially opposite the axial cylindrical extension 26 has an axial contact surface 35 which rests against a mating surface 36 of the second housing part 32.
• a circumferential sealing element 39 is arranged between the contact surface 35 and the mating surface 36 before given.
• the second housing part 32 is connected to the first housing part 31 by means of clamps 48, for example.
• centering pins 33 are arranged, which engage in corresponding centering receptacles 37.
• the first housing part 31 is preferably connected to the flange 22 of the pole housing 12 by means of screws 38.
• the Montageöff opening 40 in the parting plane 34 is approximately rectangular.
• the contact surface 35 and the counter surface 36 enclose the assembly opening 40 and are therefore also approximately rectangular.
• the first Housing part 31 is made of plastic
• the second housing part 32 is made in the form of a cover for better heat dissipation from aluminum or sheet steel.
• heat-conducting elements 28 are integrally formed on the outer wall of the second housing part 32 and are designed, for example, as cooling ribs 29 or cooling knobs.
• a circuit board 88 is arranged as the electronics unit 89, which extends transversely to the axial direction 25, preferably in the radial direction 27.
• the contact elements 100 are arranged in the first housing part 31, and form a conductive connection between the pole housing 12 and the circuit board 88 and / or the second housing part 32 made of metal.
• the contact elements 100 are designed as insert parts, which are encapsulated by the first electronics housing part 31 during injection molding.
• the contact elements 100 At a first free end 102, the contact elements 100 have the ground pins 115, which are electrically connected to the pole housing 12.
• the ground pins 115 can be designed in one piece with the contact elements 100 (see left-hand side in FIG.
• the contact elements 100 are formed as stamped and bent parts which have a fastening area 106 on which the contact element 100 is preferably encapsulated with the plastic of the electronics housing 30.
• the fastening area 106 preferably extends in a plane transverse to the rotor shaft 64.
• the first free end 102 protrudes from the housing wall 49 of the electronics housing part 31 in order to make direct contact with the pole housing as a ground pin 115. Alternatively, the first free end 102 is then connected to the separately manufactured ground pin 115, for example in the area of a through opening 116 in the housing wall 49 of the first electronics housing part 31.
• the ground pins 115 are located radially on the cylindrical peripheral wall 23 of the pole housing at. For better contact, the ground pins 115 are pressed from the inside radially outwards against the peripheral wall 23 by a pressing element 120.
• the pressing element 120 has, for example, an inner ring 121 which is joined to an outer wall 122 of the bearing seat 57 of the bearing 58. The pressing element 120 is thus supported radially on the inside on the first housing part 31, wherein it is preferably pressed onto the outer wall 122 or latched onto it.
• the pressing element 120 has radial webs 96, the radial outer ends 97 bear radially on the ground pins 115.
• the pressing element 120 is preferably designed to be resilient, so that it can be ensured that the contacting of the ground pins 115 by the pressing element 120 creates a reliable electrical connection between the pole housing 12 and the even when the electric drive 10 is subjected to shaking loads and large temperature fluctuations Electronics housing 30 forms.
• a second end 104 of the contact element 100 is in direct electrical contact with the circuit board 88 - for example by means of soldering, pressing a or an insulation displacement connection.
• the second end 104 protrudes from the plastic wall of the first housing part 31 and, for example, into a bore in the printed circuit board 88.
• At least one contact spring 110 which forms a ground connection to the inside of the second housing part 32, is electrically contacted on the printed circuit board 88.
• the ground connection between the pole housing 12 and the second housing part 32 via the ground pin 115, the contact element 100, the printed circuit board 88 and the contact spring 110 is completely formed within the housing 11.
• exactly three such contact elements 100 are inserted within the first housing part 31, which are connected to the circuit board 88 and / or the electronics housing 30 at three different points.
• FIG. 1 On the right-hand side of FIG. 1, another variant of a contact element 100 is shown, which electrically connects the pole housing 12 directly - in particular without contacting the printed circuit board 88 - with the second housing part 32 of the electronics housing 30.
• the contact element 100 is contacted at the first end 102 via the ground pin 115 by means of the pressing element 120 on the pole housing 12, and runs within the plastic wall of the first housing part 31 directly to the inside of the second housing part 32.
• the second end 104 again emerges from the plastic wall of the first housing part 31 and makes direct contact with the second housing part 32 during the axial assembly of the second housing part 32.
• the second end 104 can rest resiliently directly against the inner wall of the second housing part 32, or it can be contacted by means of a speed groove element 112.
• the prefabricated Mo tor assembly 18 is first connected to the first axial housing part 31, preferably screwed to this.
• the ground pins 115 are simultaneously pressed via the pressing element 120 against the peripheral wall 23 of the pole housing 12 in order to contact it electrically.
• the first housing part 31 can be fitted axially with the printed circuit board 88 and optionally with further components via the assembly opening 40.
• the circuit board 88 is fastened to the inside of the first housing part 31.
• the second ends 104 of the contact elements 100 can also be electrically connected - in particular soldered - to the circuit board 88.
• the second housing part 32 before it is placed on the first housing part 31, can be fitted with corresponding components.
• a connector plug 42 for making electrical contact with the drive unit 10 is integrally formed on the first housing part 31.
• the connection plug 42 has a plug collar 45 in which the individual pins 46 for the power supply and the sensor signals are arranged.
• the connector collar 45 is here radially outward from the first housing part 31.
• a first interference suppression element 52 is arranged on the circuit board 88, which, for example, has an interference suppression capacitor 53.
• a first contact element 100 is preferably arranged in the immediate vicinity of the connection plug 42 and a second contact element 100 in the immediate vicinity of the interference element 52.
• a sensor element 94 which can evaluate the signals from the signal transmitter 83, is arranged on the circuit board 88 on the side facing the pole housing 12.
• the signal transmitter 83 is designed as a sensor magnet 84 whose axial magnetic field can be detected by a sensor element 94 designed as a magnet sensor 95.
• This can be designed as a GMR or GMX sensor, for example, which can directly detect the rotational position of the sensor magnet 84.
• the electronic unit 89 can evaluate this signal in order to use it to control the electronic commutation of the EC motor 8, for example.
• the rotational position signal can also be used for the Movement of the output element 74 can be used for various applications.
• FIG. 2 shows a pressing element 120 as it is installed, for example, in FIG. 1.
• the pressing element 120 has the inner ring 121, which is preferably pressed onto the cylindrical outer wall 122 of the bearing seat 57.
• nenring 121 extend several radial webs 96, which have at their outer ra-media ends 97 contact surfaces 119 which are supported radially on the ground pins 115 and / or on the cylindrical peripheral wall 23 of the pole housing 12 when installed.
• the outer radial ends 97 are bent over in the axial direction 25, for example, so that they rest against the ground pins 115 or against the cylindrical peripheral wall 23 over a larger axial area.
• the radial webs 96 are designed to be resilient so that they exert a sufficient radial contact pressure on the ground pins 115 even when the ambient conditions change.
• the pressing element 115 is preferably designed as a bent stamped part, the inner ring 121 being stamped out in particular as a closed ring.
• exactly 5 radial webs 96 are formed, of which, for example, exactly two or exactly three are supported on corresponding ground pins 115, and the remaining radial webs 96 rest on the peripheral wall 23 of the pole housing 12.
• Fig. 3 shows a side view of the pressing element 120 of FIG. 2.
• the inner ring 121 is designed here as a sleeve 118, which comes to rest radially on the outer wall 122 of the bearing seat.
• the radial webs 96 extend approximately perpendicular to the sleeve 118 outward.
• the outer ends 97 are then angled approximately at right angles in the axial direction 25.
• At the äuße ren radial end 97 is z. B. forms a circular press ball geometry 198 out, which presses against the ground pin 115 with a small contact area and a large area.
• receptacles 98 for the ground pins can be formed on the radial outer ends in order to guide the latter more securely and to prevent the radial webs 96 from slipping off the ground pins.
• a variant of the pressing element 120 is shown in which the inner ring 121 locking elements 123 are formed with which the pressing element 120 on the electronics housing part 31 claws.
• the inner ring 121 can also be designed as a type of speed groove ring.
• the pressing surfaces 119 are arranged on axial spring tabs 91, which are connected to the radial webs 96 via U-shaped compensating elements 92. As a result, a greater radial spring travel is available for temperature compensation.
• FIG. 5 shows a section through a further exemplary embodiment in which the electronics housing 30 is already electrically connected to the pole housing 12.
• the ground pins 115 engage in a second radial step 109 of the pole housing 12.
• the axial cylindrical extension 26 of the first electronics housing part 31 engages in the first radial step 108.
• the seal 24 between the pole housing 12 and the cylindrical forestry set 26 is shown schematically, it encompassing all the ground pins 115.
• the pressing element 120 is clamped radially between the insulating mask 73 and the ground pins 115.
• the insulating mask 73 has on the radial outside of the coils 76 an axial extension 72 on which the inner ring 121 of the pressing element 120 is supported radially inward.
• the pressing element 120 is designed, for example, as a plastic ring - in particular as an injection molded part - and has no radial webs 96 here.
• the plastic material has a certain elasticity which exerts a radial pressing force on the ground pins 115 against the pole housing 12.
• the contact element 100 is injected or clamped into the housing part 31 and protrudes axially from the housing wall 49 with the second free end 104.
• the second end 104 engages, for example, in a contact opening in the printed circuit board 88 are passed through. Thereafter, the coil wire ends 79 are bent over, for example, along the housing wall 49 and clamped in forked contact tabs 47 of the interconnection device 77.
• FIG. 6 shows a further exemplary embodiment in which the pressing element 120 is arranged at its radially outer ends 97 as receptacles 98, cable lugs 85 or speed nuts 86.
• the ground pins 115 are inserted axially into the sleeve-shaped receptacles 98 in an electrically contacting manner.
• the Ka- shoes 85 and / or speed nuts 86 press the ground pins 115 radially outward against the peripheral wall 23 of the pole housing.
• the ⁇ cable lugs 85 or speed nuts 86 lie directly on the circumferential wall 23, so that the electrical contact from the pole housing runs over the cable lugs 85 or speed nuts 86, which are made of a material that has good electrical contact and high Allow contact pressure (preferably comprising copper and / or steel).
• the cable lugs 85 or speed nuts 86 are connected via the radial webs 96 to the inner ring 121, which is again designed as a sleeve 118, for example.
• the cable lugs 85 or the speed nuts 86 are formed in one piece with the radial webs 96, or alternatively attached to the outer axial ends 97 as separate components.
• the radial webs 96 again exert an elastic radial pressing force on the cable shoes 85 or speed nuts 86 in order to press them against the peripheral wall.
• the design of the two housing parts 31, 32 can also deviate from a rectangular shape and, for example, like the pole housing 12, can also be round or oval.
• the electronics housing 30 can be constructed in several parts, in particular with a metal cover. Depending on the design of the drive unit 10, the electronics housing
• the number and the specific shape of the ground pins 115 and the contact elements 100 can be adapted to the respective application.
• the pressing surfaces 119 of the pressing element 120 are adapted to the number and shape of the ground pins 115, with the number optionally being greater than the number of ground pins 115 in order to make direct electrical contact with the peripheral wall 23.
• the support of the pressing element 120 can be on the electronics housing part
• the drive unit 10 is particularly suitable as an embodiment of an EC motor 8 for the adjustment of movable ones Components, or for rotary drives in motor vehicles.
• a sol cher inventive electric motor 9 can be used particularly inexpensively outdoors, such as in the engine compartment, where it is exposed to extreme weather conditions and vibrations.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Motor Or Generator Frames (AREA)

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Citations (7)

Family Cites Families (2)

• 2019
  • 2019-07-22 DE DE102019210820.2A patent/DE102019210820A1/de active Pending
• 2020
  • 2020-07-15 WO PCT/EP2020/069945 patent/WO2021013644A1/de active Application Filing
  • 2020-07-15 CN CN202080053075.XA patent/CN114128108B/zh active Active

Patent Citations (7)

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