WO2016045831A1 - Module actionneur pourvu d'un empilement de céramiques piézo-électriques - Google Patents

Module actionneur pourvu d'un empilement de céramiques piézo-électriques Download PDF

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Publication number
WO2016045831A1
WO2016045831A1 PCT/EP2015/067503 EP2015067503W WO2016045831A1 WO 2016045831 A1 WO2016045831 A1 WO 2016045831A1 EP 2015067503 W EP2015067503 W EP 2015067503W WO 2016045831 A1 WO2016045831 A1 WO 2016045831A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuator module
stack
piezoceramics
outer electrode
connection
Prior art date
Application number
PCT/EP2015/067503
Other languages
German (de)
English (en)
Inventor
Andreas Gruenberger
Udo Schaich
Daniel Hammer
Tobias Steffens
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2016045831A1 publication Critical patent/WO2016045831A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/87—Electrodes or interconnections, e.g. leads or terminals
    • H10N30/875—Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/87—Electrodes or interconnections, e.g. leads or terminals
    • H10N30/872—Connection electrodes of multilayer piezoelectric or electrostrictive devices, e.g. external electrodes

Definitions

  • the present invention relates to an actuator module with a stack of
  • Piezoceramics wherein between the individual piezoceramics mutually guided out of the stack inner electrodes are arranged, which are each connected to an outer electrode, and wherein each of the outer electrode is connected to a connecting wire.
  • Such an actuator module is known from DE 199 45 267 Cl.
  • This actuator module has a stack of piezoceramics, between which mutually guided out of the stack inner electrodes are arranged. These internal electrodes are applied to the piezoceramics, for example, by screen printing technology.
  • the internal electrodes are directly or indirectly connected to external electrodes at opposite outer sides of the stack. At the opposite two outer electrodes are each a lead wire soldered either in the transverse direction or longitudinal direction or through
  • connection wires and plug contacts can be attached to the outer electrodes, where then then the connecting wires are attached.
  • the invention has for its object to provide an actuator module in which the force acting on the piezoceramic load through a connecting wire or vice versa that of the piezoceramics on the
  • Terminal wire is reduced buzzing load. Disclosure of the invention
  • Decoupling element is arranged. This arranged so
  • Decoupling element has several advantages. First of all, this will affect the piezoceramics during manufacture or assembly
  • connection element and the connection element adjoins the decoupling element off the stack. This is a preferred one
  • Decoupling element can be attached.
  • connection element in the region of an insulating element between the stack and a Aktormodulfappel the
  • the insulating element is made of plastic, for example, and prevents a short circuit between the opposing outer electrodes and the Aktormodulfuß preferably made of a metallic, electrically conductive material.
  • the isolation element also allows a fixation and alignment of components in the actuator module.
  • the connection wire is fastened to the connection element with an end freed from insulation, and the further isolated insulated connection wire is led out of the actuator module through a passage opening through the actuator module bus.
  • connection element is fixed to the insulation element. This embodiment prevents, for example, initiated by the lead wire loads on the decoupling element to get redirected. In addition, this achieves a fixation of the components connected or interacting with the connection element.
  • the fixing takes place by means of at least one engaging in the insulating element tab.
  • This tab can be impressed for example by a heated tool in the insulation element.
  • connection wire is fastened to the connection element mechanically or by means of a thermal connection method.
  • a mechanical fastening method can be produced, for example, by a crimping connection, in which the connecting element is bent around the insulation-free end of the connecting wire.
  • Connection method is, for example, by a soldering, a
  • Laser welding or a resistance welding can be displayed.
  • Connection element integrally formed The component thus formed may be formed as a stamped and bent part.
  • the outer electrode has a meandering structure.
  • This meander structure makes it possible to fasten the decoupling element, which is formed integrally with the connection element, by a clip fastening on the outer electrode with the meandering structure.
  • the outer electrode In a further embodiment of the invention, the outer electrode, the
  • the component thus formed can be produced as a stamped and bent part.
  • the punched-bent part thus installed combines the functions of mechanical decoupling of the stack of piezoceramics from the connecting wires, the electrical connection in the connecting wire and the fixing of the components via the engaging in the insulating element tab in the mounted state.
  • FIG. 1 shows a longitudinal section through a schematically illustrated injector with an inventively designed actuator module
  • Figure 2 is a schematic view of an inventively designed
  • FIG. 3 shows a detail view with a decoupling element and subsequent connecting element adjoining an outer electrode
  • FIG. 4 shows a detail view with an outer electrode which has a meander structure and a clipped-in decoupling element and
  • FIG. 1 shows a longitudinal section through an injector 1 of an injection device in which the actuator module according to the invention is installed.
  • Injectors are attached to an internal combustion engine as part of a
  • Fitted fuel injection system and the respective injector 1 is for
  • the injector 1 has a holding body 2, in which a recess 3 for receiving the actuator module 4 is embedded. Below the holding body 2 is a
  • Injector body 5 is arranged and by means of a screw 6 with the
  • Bolted body 2 In an injector needle guide of the injector body 5, an injector needle 7 is longitudinally movably guided, the spray openings 8 dominates the end side of the injector body 5. Sits the Injektornadel 5 in a
  • Spray openings 8 adjacent valve seat is a flow connection for fuel from a schematically illustrated feed 9 to the
  • Spray openings 8 interrupted. Is the Injektornadel 5, however, from the
  • Valve seat moves toward the actuator module 4 out, which is
  • Flow connection is released and it gets over the feeder For example, injected from a high-pressure accumulator fuel injected via the spray openings 8 in an associated combustion chamber of the internal combustion engine.
  • the longitudinal adjustment of the injector needle 5 is controlled by the actuator module 4 with the inclusion of a coupler 10.
  • the actuator module 4 has a stack 11 of piezoceramics, wherein between the individual piezoceramics mutually guided out of the stack 11 inner electrodes 12a, 12b are arranged, which are each connected to an outer electrode 13a, 13b.
  • inner electrodes 12a, 12b are arranged, which are each connected to an outer electrode 13a, 13b.
  • Outer electrode 13a, 13b lying opposite opposite sides of the stack 11 of piezoceramics is - as will be explained in more detail below - connected to a connecting wire 14a, 14b.
  • a voltage is sent to the actuator module 4 for actuating the same by a control device.
  • the stack 11 of piezoceramics undergoes an elongation by utilizing a suitable crystal structure which is used for adjusting the injector needle 7. If the electrical voltage is switched off, the elongation of the stack 11 is released and the injector needle 7 is moved back to the starting position.
  • the stack 11 of piezoceramics is supported directly or indirectly on an actuator module base 16. For example, between the stack 11 of piezoceramics
  • Piezoceramics and the Aktormodulfuß 16 an insulation element 15, which is made for example of plastic, be arranged and / or the
  • Aktormodulfuß 16 at least partially surrounded.
  • the Aktormodulfuß 16 is defined in the recess 3 in the holding body 2, and at a current to the insulating element 15 opposite end of the stack 11 of the piezoceramics is moved by a defined path and thereby performs the switching function in the injector 1.
  • the Anuschlußdrumblete 14a, 14b are passed through the Aktormodulfuß 16 and connected to a connector part 17. An electrical connection to the control device is made via the plug part 17.
  • Connection wire 14a, 14b is arranged. In this case, the connecting wire 14a, 14b directly to the decoupling element 18 or as in the illustrated
  • Embodiments is shown to be attached to a connecting element 19, which in turn cooperates with the interaction of the decoupling element 18 with the outer electrode 13a, 13b.
  • the resulting possibilities are described in detail in the embodiments described in Figures 3 and 4 in more detail.
  • FIG. 2 shows that the decoupling element 18 and the connecting element 19 are arranged on the outside of the insulating element 15 and the respective connecting wire 14a, 14b connected thereto is guided through the actuator module base 16.
  • the connecting wire 14a, 14b in the field of implementation by the Aktormodulfuß 16 is of course isolated from this, if the
  • Aktormodulfuß 16 is made of a conductive material.
  • the decoupling element 18 is U-shaped and is integrally formed, for example, with the outer electrode 13a and the
  • Connection element 19 is formed in the illustrated embodiment as a stamped and bent part.
  • the U-shaped decoupling element 18 prevents vibrations of the stack 11 of piezoceramics from transferring to the contact point on the connection element 19 with the respective connection wire 14a, 14b and stimulating the contact point to vibrate.
  • the decoupling element 18 protects the piezocontacting from acting forces in the production or assembly of the actuator module 4.
  • the width of the decoupling element 18 and also of the connection element 19 are reduced with respect to the width of the outer electrode 2. This ensures that, in particular, the U-shaped region of the decoupling element 18 is elastic.
  • the connecting element 19 has lateral crimping portions 20a, 20b which correspond at most to the width of the outer electrode 13a and which can be bent by means of a crimping tool around a stripped end region of the connecting wire 14a for a permanent and reliable contacting.
  • each of the connecting wires 14a, 14b but also by means of a thermal connection method to be connected to the connection element 19.
  • crimping sections 20a, 20b need not be provided.
  • connection element 19 mechanically to the
  • Isolation element 15 connect, at least one tab 21 on the
  • Connection element 19 is provided, which can be impressed for example by a heated tool in the isolation of the decoupling element 15.
  • each of the outer electrodes 13a, 13b has a meandering structure 22 and is correspondingly wave-shaped.
  • the decoupling element 18 and the connecting element 19 are made flat, the decoupling function is ensured by a suitable punch geometry.
  • a connecting tab 23 is mechanically and electrically connected in an end region 24 of the stack 11 of piezoceramics and can produce a possible offset of the two planes, namely ceramic and insulation.
  • the connection element 19 can in turn be suitably connected to the insulation element 15, in the illustrated embodiment by a positive connection between the crimp sections 20a, 20b formed here as bending tabs.
  • the connection wire 14a is soldered to the connection element 19, for example.

Abstract

L'invention concerne un module actionneur 4 comprenant un empilement 11 de céramiques piézo-électriques, des électrodes internes 12a, 12b qui émergent de l'empilement 11 en étant disposées alternativement entre les différentes céramiques piézo-électriques et qui sont respectivement reliées à une électrode externe 13a, 13b, et chacune des électrodes externes (13a, 13b) étant reliée à un fil de sortie 14a, 14b. L'invention concerne un module actionneur 4 dont la charge agissant sur les céramiques piézo-électriques est respectivement inversement réduite par les fils de sortie 13a, 13b. A cet effet, un élément de découplage 18 en U est disposé entre l'électrode externe 13a, 13b respective et le fil de sortie 14a, 14b associé.
PCT/EP2015/067503 2014-09-23 2015-07-30 Module actionneur pourvu d'un empilement de céramiques piézo-électriques WO2016045831A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014219147.5 2014-09-23
DE102014219147.5A DE102014219147A1 (de) 2014-09-23 2014-09-23 Aktormodul mit einem Stapel von Piezokeramiken

Publications (1)

Publication Number Publication Date
WO2016045831A1 true WO2016045831A1 (fr) 2016-03-31

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Application Number Title Priority Date Filing Date
PCT/EP2015/067503 WO2016045831A1 (fr) 2014-09-23 2015-07-30 Module actionneur pourvu d'un empilement de céramiques piézo-électriques

Country Status (2)

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DE (1) DE102014219147A1 (fr)
WO (1) WO2016045831A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107830998B (zh) * 2017-10-31 2019-04-30 北华大学 重型数控龙门刨床移动工作台可靠性试验装置
CN107894332B (zh) * 2017-11-29 2019-07-30 北华大学 牛头刨床横向工作台可靠性试验系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004015574A1 (de) * 2003-03-31 2004-11-11 Denso Corp., Kariya Geschichtetes piezoelektrisches Element mit zuverlässiger elektrischer Verbindung
US20060055288A1 (en) * 2002-06-07 2006-03-16 Pi Ceramic Gmbh Keramische Tech, Und Dauelemente Method for the production of monolithic multilayer actuator monolithic multilayer actuator made of a piezoceramic or electrostrictive material and external electrical contact for a monolithic multilayer actuator
EP2043172A2 (fr) * 2007-09-27 2009-04-01 Siemens Aktiengesellschaft Dispositif de mise en contact de tiges de contact de piézoactionneurs avec des éléments de raccordement
DE202014100666U1 (de) * 2014-02-14 2014-02-24 Epcos Ag Piezoelektrisches Aktorbauelement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19945267C1 (de) 1999-09-21 2001-04-19 Bosch Gmbh Robert Verfahren zur Anbringung von flächigen Außenelektroden auf einem piezokeramischen Vielschichtaktor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060055288A1 (en) * 2002-06-07 2006-03-16 Pi Ceramic Gmbh Keramische Tech, Und Dauelemente Method for the production of monolithic multilayer actuator monolithic multilayer actuator made of a piezoceramic or electrostrictive material and external electrical contact for a monolithic multilayer actuator
DE102004015574A1 (de) * 2003-03-31 2004-11-11 Denso Corp., Kariya Geschichtetes piezoelektrisches Element mit zuverlässiger elektrischer Verbindung
EP2043172A2 (fr) * 2007-09-27 2009-04-01 Siemens Aktiengesellschaft Dispositif de mise en contact de tiges de contact de piézoactionneurs avec des éléments de raccordement
DE202014100666U1 (de) * 2014-02-14 2014-02-24 Epcos Ag Piezoelektrisches Aktorbauelement

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