EP3109951B1 - Elektrische baueinheit, verbindungseinheit mit mindestens einer elektrischen baueinheit, fahrzeug damit und verfahren zum herstellen einer elektrischen baueinheit - Google Patents

Elektrische baueinheit, verbindungseinheit mit mindestens einer elektrischen baueinheit, fahrzeug damit und verfahren zum herstellen einer elektrischen baueinheit Download PDF

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Publication number
EP3109951B1
EP3109951B1 EP16174232.5A EP16174232A EP3109951B1 EP 3109951 B1 EP3109951 B1 EP 3109951B1 EP 16174232 A EP16174232 A EP 16174232A EP 3109951 B1 EP3109951 B1 EP 3109951B1
Authority
EP
European Patent Office
Prior art keywords
electrical
electrically conductive
contact
leadframe
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16174232.5A
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German (de)
English (en)
French (fr)
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EP3109951A1 (de
Inventor
Karsten RUNGE
Andreas Teichmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF CV Systems Hannover GmbH
Original Assignee
Wabco GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wabco GmbH filed Critical Wabco GmbH
Publication of EP3109951A1 publication Critical patent/EP3109951A1/de
Application granted granted Critical
Publication of EP3109951B1 publication Critical patent/EP3109951B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles

Definitions

  • the invention relates to an electrical unit with at least two electrical components, in particular sensors and / or actuators, according to the preamble of claim 1, a connection unit with at least one electrical unit and at least one further electrical unit, a vehicle, in particular a commercial vehicle, and a method for Production of an electrical unit according to the preamble of claim 11.
  • DE 10 2007 052 697 A1 shows a solenoid valve unit for an electropneumatic control, which is particularly useful in a pressure modulator of a commercial vehicle.
  • the magnetic coils and the pressure sensor are contacted via a common leadframe and led individual leads or lines to an electrical interface.
  • An electrically conductive plug connection with an electronic control unit can then be produced via the electrical interface.
  • the production of a plug connection is complicated and expensive in the production of electrical units, such as control units.
  • DE 10 2012 014 407 A1 shows an apparatus for detecting and processing sensor readings and / or for controlling actuators.
  • the sensors and / or actuators are arranged in a base housing and an electronic control unit in a cover, wherein the cover is coverable connected to the base housing.
  • the sensors and / or actuators have electrically conductive contact springs, which are in contact with contact surfaces on a printed circuit board of the control electronics.
  • connection requires at least two contact springs for each sensor and / or actuator and is therefore correspondingly expensive.
  • DE 10 2007 009 006 A1 discloses a key switch for a motor vehicle, which has at least three contact points to be joined together for a current path, which can be electrically connected to one another by a contact element can be pressed against the contact points, wherein the contact points are formed by conductor strips of a plastic-coated stamped grid.
  • DE 10 2007 009 006 A1 discloses the preamble of claim 1.
  • DE 10 2007 038 534 A1 discloses a contact assembly for electrically contacting two assemblies with a plurality of contact spring elements, which are held by a support member, wherein the individual contact spring elements each have a first contact region and an axially spaced second contact region, wherein after contacting the two assemblies of the first contact region on a corresponding first Contact surface of a first assembly rests and the second contact region rests on a second contact surface of a second assembly and wherein the axial distance between corresponding first Kontkat Schemee and second contact regions of the contact spring elements is changed in the contacting, and an associated fluid aggregate.
  • the individual contact spring elements are each made in one piece, wherein the first contact region is connected via a spring element directly to the second contact region.
  • the invention is based on the object to provide a simple and cost-effective electrical connection with which at least two electrical components of an electrical unit can be electrically connected to a further electrical unit.
  • the invention solves this object with an electrical unit having the features according to claim 1, with a connection unit having the features according to claim 8, with a vehicle having the features according to claim 10 and with a method for producing an electrical unit with the features according to claim 11 ,
  • the electrical assembly according to the invention in particular solenoid valve unit, has at least two electrical components, in particular sensors and / or actuators, and at least three electrically conductive connection contacts.
  • the electrical assembly can be connected to a further electrical unit. This may for example be a connection between a solenoid valve unit and an electrical control unit.
  • the actuators are preferably designed such that they can control and regulate fluid flows, such as solenoid valves.
  • servomotors, electromagnets or the like come as actuators into consideration.
  • the electrically conductive connection contacts are electrically conductively connected to the at least two electrical components via a line grid, also called a leadframe.
  • the electrically conductive connection contacts of the electrical assembly are designed as electrically conductive contact springs.
  • the spring force of the contact springs advantageously results in a reliable electrical contact.
  • the line grid common electrical lines of the at least two electrical components are combined in an electrically conductive manner.
  • the combined electrical line is preferably a ground line (GND line) or a zero-volt potential line of the electrical components or another line always at the same potential.
  • This common line of the line grid has a common electrically conductive contact spring as an electrically conductive connection contact for an electrically conductive connection with a further electrical unit. This advantageously reduces the number of contact springs used and thus saves space and costs compared to a conventional conductive connection between an electrical unit and a further electrical unit according to the prior art.
  • the common line of the line grid can also be connected via more than one electrically conductive contact spring with another electrical unit.
  • the line grid or leadframe on electrically conductive pads which are designed so as to form an electrically conductive connection with the electrical components.
  • a connecting wire of the electrical component for example, a coil wire of the solenoid valve, placed between two pads and the pads connected to each other, in particular soldered or welded.
  • the connection between the wire grid and the electrical component is advantageously particularly resistant to vibration, which increases the service life of the electrical connection.
  • the contact springs are arranged in an insulating part.
  • the insulating part is preferably integrally formed, in particular as a plastic injection molded part, and serves as a holder for the contact springs. This advantageously simplifies the Assembly of the contact springs, as they are only inserted into the insulation part.
  • the insulating part is fastened by means of fastening means on the line grid or leadframe.
  • the attachment advantageously ensures a persistently accurate positioning of the contact springs, which are arranged in the insulating part, so that via the contact springs, a reliable conductive connection can be made with the wire grid.
  • the fastening means are arranged in the immediate vicinity of the contact springs in order to absorb the pressure forces exerted by the contact springs on the wire grid and to advantageously avoid a deflection of the wire grid.
  • the fastening means for fixing the insulating part on the wire grid or leadframe are sawtooth-shaped.
  • the associated recess in the insulating part is also sawtooth-shaped.
  • the fastening means are part of the line grid to be connected to the insulating part and are punched out with the line structure during the production process of the line grid.
  • these fastening means are bent up so that they are substantially perpendicular to the line structure.
  • the insulating part has a spring receptacle formed as an open receptacle at two opposite ends, wherein this spring receptacle has at least one spring receptacle Has cross-sectional taper. This cross-sectional taper protrudes into the spring receptacle in such a way that it forms a projection on which a contact spring can be supported.
  • the contact spring is designed such that the contact spring is adapted to the shape of the spring receptacle.
  • the contact spring has different diameters, wherein the contact spring end directed towards the conductor track or leadframe has a larger cross-section than the contact spring end serving to connect a further unit.
  • the contact spring is held by the projection within the spring retainer so that the contact spring can not fall out, if the electrical unit does not make electrical connection with another unit, i. is in the unmounted state.
  • the insulation part has at least one support projection, which is designed in such a way as to crash the insulation part against the electrical components.
  • the forces acting on the insulating part by the contact springs are dissipated via the supporting projection. There is a lower deflection of the insulating part, whereby the contact springs are advantageously hardly excitable to adverse vibrations.
  • the insulating part covers the line grid or leadframe, so that the line grid is integrated in the insulating part.
  • the line structures of the line grid similar to an encapsulation, insulated from the environment and thus the line grid advantageously has a higher stability.
  • the contact springs are mechanically fixed by means of a spring holder on the wire grid.
  • a spring holder on the wire grid.
  • the wire grid has a through hole for contacting the wire grid with the contact spring.
  • the spring holder is already part of the encapsulation of the line grid.
  • connection unit in particular mechatronics unit, with at least one electrical unit and at least one further electrical unit.
  • the electrical unit is preferably a solenoid valve unit and the further electrical unit is an electrical control unit.
  • the connection unit according to the invention is also formed by a simple connection between the solenoid valve unit and a plug as another electrical unit, as is the case for example in simple ABS solenoid valves in a vehicle brake system.
  • connection unit in particular the contacting of the electrical components, in particular sensors and / or actuators, advantageously takes place simultaneously by placing the further electrical unit.
  • the further electrical unit has contact surfaces, which are designed in such a way as to communicate with the electrically conductive contact springs of the electrical unit to make electrically conductive connection.
  • the contact surfaces can be arranged directly on a circuit board or on a SMD component (Surface Mounted Device) formed contact plate.
  • the contact plate is preferably made thicker than the conductor tracks arranged on the board, in order to obtain the electrical contact capability in the event of possible abrasion by the seated contact spring.
  • the contact plates can also be constructed in multiple layers, in particular have a silver or gold layer.
  • the o.g. The object is also achieved by means of a vehicle, in particular a commercial vehicle, wherein the vehicle has at least one electrical unit described above and / or at least one o.g. Having connection unit.
  • the o.g. Task by means of a method for producing an electrical assembly, in particular solenoid valve unit, with at least two electrical components, in particular sensors and / or actuators, and at least three electrically conductive connection contacts solved, wherein the electrical assembly is electrically conductively connected by means of the connection contacts with another electrical unit ,
  • the electrically conductive connection contacts are electrically conductively connected via a line grid or leadframe to the at least two electrical components and designed as electrically conductive contact springs.
  • common electrical lines of the at least two electrical components are combined in an electrically conductive manner by means of the conductor grid and electrically conductively connected to an electrically conductive contact spring.
  • the merging of the common lines is generated via a suitable line structure or line layout of the line grid and is particularly easy to produce, since the line grid is punched or laser cut.
  • the contact springs can be arranged arbitrarily, regardless of the electrical connections of the electrical components.
  • the contact springs are preferably spatially spaced and arranged against each other electrically isolated and adapted in their arrangement of the connected further electrical unit.
  • connection via electrically conductive contact springs also has the advantage that the electrical connection of the electrical unit with the other unit even with strong vibrations, such as those that occur in vehicles, works reliably.
  • the contact springs advantageously allow a tolerance compensation of manufacturing tolerances of the individual components and a compensation of thermal expansion.
  • n electrical components in particular sensors and / or actuators
  • 2 * n contact springs are necessary in order to produce an electrically conductive connection with a further unit.
  • the structural unit according to the invention requires only n + 1 contact springs, which advantageously reduces costs and assembly costs compared to the prior art.
  • Fig. 1 shows a schematic representation of a plan view of a designed as a solenoid valve unit electrical assembly 2 with three solenoid valves not shown as electrical components.
  • the electrically conductive connection contacts are formed as electrically conductive contact springs 4, 6, 8, 10 and arranged spatially spaced from one another on a wire grid or leadframe 12 so as to be electrically conductive therewith.
  • the line grid 12 has, for each electrical component, two connection surfaces 14, on which the contact wires of the electrical components, in this case solenoid valves, are fastened in an electrically non-illustrated manner, in particular by means of arc welding.
  • the line grid 12 has a line structure that is adapted to the spatial extent of the electrical components, and the pads 14 positioned in the immediate vicinity of the contact wires of the electrical components.
  • portions of the conductor grid 12 are preferably bent in such a way that these portions extend substantially perpendicular to the conductor structure of the conductor grid 12.
  • the invention provides that by means of the line structure of the line grid 12 common lines of the electrical components are combined to form a line.
  • the ground lines of the solenoid valves are combined to form a common ground line 16 on the line grid 12.
  • the common line 16 is electrically conductively connected to the solenoid valves via three connection surfaces 14 and has a common contact spring 4 as an electrically conductive connection contact.
  • the other contact springs 6, 8, 10 are each electrically conductive with one of the electrical components, in particular Solenoid valves, each connected by a pad 14 and form the positive pole of the applied supply voltage.
  • the common line 16 may also have more than one electrically conductive contact spring as electrically conductive connection contacts, which is not shown here.
  • a connection via more than one electrically conductive contact spring is particularly advantageous if a larger current flows on the common line 16 than on the other lines of the line grid 12.
  • the line grid 12 is preferably punched out of a sheet or laser cut, wherein the individual lines are all initially connected. If the line grid 12 installed so far that it is mechanically fixed, the individual lines are severed according to the desired line structure. The severing of such shorting bridges is in Fig. 1 shown in dashed line as line separation 17.
  • the contact springs 4, 6, 8, 10 are arranged in an insulating member 18, wherein the insulating member 18 with a dashed line in Fig. 1 is shown.
  • FIG. 1 shown line grid 12 almost completely covered by the insulating member 18 and thus protected from environmental influences.
  • the line grid 12 is fastened by means of suitable fastening means 20 to the insulating member 18, wherein the fastening means 20 are preferably formed like a sawtooth and are pressed as bent portions of the conductor grid 12 in recesses provided for this purpose in the insulating member 18.
  • the contact springs 4, 6, 8, 10 in the unmounted state of the electrical assembly 2 i. If the electrical unit 2 does not receive electrical connection to another unit, do not fall out of the insulating member 18, the insulation member 18 for each contact spring 4, 6, 8, 10 a spring receiving a cross-sectional taper, wherein the cross-sectional taper projecting into the spring receiving Projection 22 forms, on which the contact spring 4, 6, 8, 10 is supported.
  • Fig. 2 shows a schematic representation of a sectional view by way of example by a contact spring 4, which is inserted in a spring receptacle 24 of the insulating member 18.
  • the contact spring 4 is conical or cylindrical and mechanically biased installed.
  • the contact spring 4 is further dimensioned in its length and spring constant such that the contact spring 4 can press in the installed state with sufficiently large pressure against an opposite contact surface 26 to ensure the smallest possible and constant electrical contact resistance and thus advantageously for a high contact reliability to care.
  • the contact spring 4 has sections with different diameters.
  • the contact spring 4 preferably has a larger diameter at the contact spring end facing the line grid 12 than at the other contact spring end. This larger diameter is adapted to the shape of the spring receptacle 24 of the insulating member 18 such that the contact spring 4 is supported with the larger diameter of the projection 22 within the spring receptacle 24. With the projection 22 and a suitable dimensioning of the lengths and spring constants of the individual sections of the contact spring 4, a different preferred pressure force can be generated in each case for both contact spring ends.
  • the sawtooth-shaped fastening means 20 are pressed into corresponding recesses of the insulating part 18, wherein the fastening means 20 are preferably arranged in close proximity to the contact spring 4 in order to avoid a deflection of the line grid 12.
  • the line grid 12 has electrically conductive pads 14 for contacting the electrical components of the electrical unit 2.
  • the electric coils of the solenoid valves with the lead frame 12th electrically contacted via the connection surfaces 14.
  • the contact surface 26 has a quadrangular, circular, elliptical or oval peripheral geometry or a combination of said circumferential geometries.
  • the contact surface 26 projects beyond the diameter of the contact spring 4.
  • the contact surface 26 may have a recess for receiving the contact spring 4.
  • the contact surface 26 is formed as the surface of a contact plate 32, which has a single or multilayer structure.
  • the contact plate 32 is designed as an SMD component, which can be soldered directly onto connection pads or connection pads of the circuit board 28, the same manufacturing process, in particular the reflow soldering method, can advantageously be used for the attachment of the contact plates 32 ("Reflow" soldering) are used, which is also used for soldering the other SMD components.
  • the contact surface 26 having contact pad 32 is substantially thicker than the conductor tracks of the board 28 is formed.
  • the electrical assembly or connection unit is exposed to strong vibrations, which leads to abrasion of the contact material of contact spring 4 and opposite contact surface 26.
  • the copper or nickel-containing contact plates 32 are provided with a silver layer or gold layer, which advantageously leads to a better conductivity and / or to an increased resistance to wear compared to the conductor tracks located on the board. This advantageously improves the contact ability of a seated contact spring.
  • Fig. 3 shows a block diagram for explaining the inventive method for producing an electrical assembly 2 with the essential stages of production.
  • a layout phase 34 of the method according to the invention takes place in which the line structure or the line layout of the line grid 12 is determined in order to adapt the line grid 12 to the electrical components to be connected in such a way that the components are electrically conductively connected to the connection areas 14 of the line grid 12 can and common lines of the electrical components are combined with the line grid 12.
  • the line grid 12 punched out of a sheet or removed by laser cutting from a sheet.
  • a connecting phase 36 the components of the electrical unit 2 are assembled and the contact springs 4, 6, 8, 10 are electrically conductively connected to the line grid 12. These contact springs 4, 6, 8, 10 then form the electrical connection contacts of the electrical unit 2.
  • a fixing phase 38 of the method according to the invention provides for a fixation of the contact springs 4, 6, 8, 10 on the line grid 12.
  • the fixation is preferably carried out via an insulating member 18 with corresponding spring mounts 24 with which the contact springs 4, 6, 8, 10 are held or by means of a spring holder.
  • a separation phase 39 the short-circuit connections on the line grid 12 are severed.
  • the line grid 12 thus receives the necessary line structure in order to produce an electrical connection of the electrical components to a further electrical unit 30.
  • Fig. 4 shows a schematic representation of the detailed explanation of a first and second method step for producing an electrical assembly 2 according to an embodiment of the invention by way of example to two contact springs 4, 6th
  • a first method step 40 the insulating part 18 is inserted into a mounting bracket 42.
  • the insulating member 18 is oriented such that the spring receivers 24 point out with its largest cross-sectional opening of the mounting bracket 42.
  • the contact springs 4, 6 are inserted into the spring receptacles 24.
  • the contact springs 4, 6 are used with their contact spring end with the smaller diameter in the spring receptacle 24 so that the contact springs 4, 6 can be supported with its larger diameter on the projection 22.
  • Fig. 4 is also indicated that the line grid 12 is set with the downwardly facing fasteners 20 and the pads 14 on the contact springs 4, 6.
  • Fig. 5 shows a schematic representation of the detailed explanation of the third, fourth and fifth method step for producing an electrical assembly 2 according to an embodiment of the invention by way of example to two contact springs 4, 6.
  • a third method step 46 the line grid 12 is pressed into the insulation part 18 and fixedly connected to the insulation part 18 by the fastening means 20.
  • a fourth method step 48 the electrical connection of the contact springs 4, 6 is checked with the line grid 12 by a control unit 50 connects a first electrically conductive contact 52 with the line grid 12 and in each case a second electrical contact 54 with the contact spring 4, the sixth
  • a fifth method step 56 the short-circuit connections on the line grid 12 are severed.
  • the line grid 12 receives the necessary for electrical connection of the electrical components, such as solenoid valves, with another electrical unit 30, such as control unit, line structure.
  • the fully assembled electrical unit 2 can then be removed from the mounting bracket 42 and electrically connected by placing a further unit 30 thereto.

Landscapes

  • Regulating Braking Force (AREA)
  • Motor Or Generator Frames (AREA)
EP16174232.5A 2015-06-27 2016-06-13 Elektrische baueinheit, verbindungseinheit mit mindestens einer elektrischen baueinheit, fahrzeug damit und verfahren zum herstellen einer elektrischen baueinheit Active EP3109951B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015008334.1A DE102015008334A1 (de) 2015-06-27 2015-06-27 Elektrische Baueinheit, Verbindungseinheit mit mindestens einer elektrischen Baueinheit, Fahrzeug damit und Verfahren zum Herstellen einer elektrischen Baueinheit.

Publications (2)

Publication Number Publication Date
EP3109951A1 EP3109951A1 (de) 2016-12-28
EP3109951B1 true EP3109951B1 (de) 2019-02-20

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EP16174232.5A Active EP3109951B1 (de) 2015-06-27 2016-06-13 Elektrische baueinheit, verbindungseinheit mit mindestens einer elektrischen baueinheit, fahrzeug damit und verfahren zum herstellen einer elektrischen baueinheit

Country Status (3)

Country Link
EP (1) EP3109951B1 (tr)
DE (1) DE102015008334A1 (tr)
TR (1) TR201906395T4 (tr)

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DE102018122302A1 (de) * 2018-09-12 2020-03-12 Fte Automotive Gmbh Aktoreinheit für ein Fahrzeuggetriebe
DE102018122301A1 (de) * 2018-09-12 2020-03-12 Fte Automotive Gmbh Aktoreinheit für ein Fahrzeuggetriebe
DE102018123993B4 (de) 2018-09-28 2022-05-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Kontaktiereinrichtung zum elektrischen Kontaktieren einer Stromführungseinrichtung mit einem Modul für ein Fahrzeugsystem für ein Fahrzeug, Kontaktvorrichtung mit einer Kontaktiereinrichtung und Verfahren zum Herstellen einer Kontaktiereinrichtung
DE102018123995A1 (de) * 2018-09-28 2020-04-02 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Kontaktiereinrichtung zum elektrischen Kontaktieren einer Leiterplatte mit einem Spulenkörper für ein Magnetventil für eine Bremseinrichtung für ein Fahrzeug, Magnetventil mit einer Kontaktiereinrichtung und Verfahren zum Herstellen einer Kontaktiereinrichtung
DE102020105298A1 (de) 2020-02-28 2021-09-02 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Leiterplatte mit einer Kontaktstelle

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Publication number Publication date
DE102015008334A1 (de) 2016-12-29
TR201906395T4 (tr) 2019-05-21
EP3109951A1 (de) 2016-12-28

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