EP2932581A2 - Actuator - Google Patents

Actuator

Info

Publication number
EP2932581A2
EP2932581A2 EP13805856.5A EP13805856A EP2932581A2 EP 2932581 A2 EP2932581 A2 EP 2932581A2 EP 13805856 A EP13805856 A EP 13805856A EP 2932581 A2 EP2932581 A2 EP 2932581A2
Authority
EP
European Patent Office
Prior art keywords
characterized
heat sink
actuator according
electronics
actuator
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.)
Withdrawn
Application number
EP13805856.5A
Other languages
German (de)
French (fr)
Inventor
Joachim Von Willich
Christian Reimann
Vinzent Kremina
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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
Priority to DE102012223297 priority Critical
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to PCT/EP2013/076378 priority patent/WO2014090946A2/en
Publication of EP2932581A2 publication Critical patent/EP2932581A2/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30Structural association with control circuits or drive circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D11/00Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1065Mechanical control linkage between an actuator and the flap, e.g. including levers, gears, springs, clutches, limit stops of the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30Structural association with control circuits or drive circuits
    • H02K11/33Drive circuits, e.g. power electronics
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/08Insulating casings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/22Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D11/00Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D2011/101Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
    • F02D2011/102Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1075Materials, e.g. composites
    • F02D9/108Plastics

Abstract

The invention relates to an actuator comprising a metal housing (1) that consists of multiple housing parts (1, 9), an electric motor (8), an actuating member (2), a transmission mechanism (4-7) that adapts the movement of the electric motor (8) to the actuating member (2) and an electronic system (10) for controlling the electric motor (8). At least one housing part (9) consists of plastic, a heat sink (13) being situated in the region of the housing part (9) that consists of plastic. The heat sink (3) has thermal connecting surfaces (16, 19) for the electronic system (10) and is connected to a metal housing part (1).

Description

description

actuator

The invention relates to an actuator with a metal housing consisting of several housing parts, an electric motor, an actuator, a movement of the electric motor to the actuator adjusting the transmission mechanism and electronics for controlling the electric motor.

Such actuators have an electric motor-driven actuator in the form of a flap, a pin or are used as actuators or valves in motor vehicles and are thus known. The metal housing used are usually cast aluminum housing, since such housing have sufficient strength at relatively low weight. In order to bring the components into the housing, this consists of two or more housing parts. Since actuators in motor vehicles are generally exposed to high temperatures, the multi-part aluminum housing is used because of its good thermal conductivity for cooling the components arranged in the housing, in particular the electronics. When using the actuator in the high temperature range, it is also known to provide active cooling in the form of water cooling in the housing. The disadvantage is that the arrangement of a water cooling greatly increases the cost of the aluminum housing. For housings without water cooling, the housing parts for a sufficient heat capacity must have relatively thick walls in order to achieve a good cooling. As a result, such a housing has a relatively high weight.

The invention is therefore an object of the invention to provide an actuator that is simple and inexpensive. In addition, the actuator should have a low weight. The object is achieved in that at least one housing part is made of plastic, that in the region of the housing made of plastic, a heat sink is arranged, that the heat sink has thermal bonding surfaces for the electronics and that the heat sink is connected to a metallic housing part.

The arrangement of a separate heat sink allows the cooling of certain areas and / or components in the housing. This has a particularly advantageous effect on heat-producing components, in particular electronics. Due to the cooling components with lower heat resistance and thus less expensive components can be used. By the cooling no longer has to be taken over exclusively by the housing, the corresponding housing part may be made of a plastic, which also can be dispensed with the use of high temperature resistant plastics and instead less expensive plastics are used. The main advantage, however, is that the actuator has a significantly lower weight through the use of plastic.

If the housing part is a plastic cover, this configuration makes it possible for the electronics to be fastened to the plastic cover due to the insulating properties of plastic. A separate attachment of the electronics can be saved with it. The KunstStoffdeckel may have appropriate recordings or domes, in the appropriately designed holding elements, eg. B. holes, rest stops, the electronics are clipped. Such recordings can be produced in a simple manner during the production of the lid by means of injection molding. Additional retaining elements on the electronics can be dispensed with according to a further embodiment if individual strip conductors are designed to be clipped into the receptacles of the plastic cover. Good cooling is achieved when a metal body is used as a heat sink. Due to the thermal conductivity of metals, these substances are better than other materials. An improved cooling or the use of a smaller metal body as a heat sink is achieved in that the metal body contains at least one metal with good thermal conductivity, preferably copper or aluminum.

According to a further embodiment, an improved heat dissipation from the electronics is achieved in that the electronics has heat transfer surfaces which are connected to the thermal bonding surfaces of the heat sink.

Unnecessary heating of the electronics is avoided by arranging the heat transfer surfaces in the vicinity of highly heat-producing electrical components of the electronics. In this way, the heat is dissipated in a short path to the heat sink without heating other areas of the electronics.

An influencing of the electronics can be avoided in another embodiment in that the thermal connection surfaces have an electrically non-conductive coating, preferably made of plastic or a lacquer. In certain circumstances, however, such interference may be intentional, particularly if the housing is to be brought to a defined electrical level, which has advantages, for example, in electromagnetic compatibility. In these cases, the transfer surfaces are electrically conductive, for example, by the metal body and the transfer surfaces are uncoated. Such a defined electrical level can be, for example, the electrical connection of the housing via the heat sink with parts of the electronics which are at ground potential. A particularly simple connection of the electronics to the heat sink is achieved via the thermal connection surfaces, if these are designed as convex areas in the direction of the electronics. Due to this design, the connection surfaces create a certain bias, whereby an intimate contact between the heat sink and electronics is achieved. An additional fixed mounting of the heat sink to the electronics can therefore be dispensed with. Another advantage of this design is that convex curved areas can be relatively easily produced by means of embossing.

The thermal bonding surfaces can be formed in a further embodiment as in the direction of the electronics bent tabs. These areas to be produced by means of punching are easy to produce. Due to their design, they also have a bias to ensure reliable contact with the electronics.

For large amounts of heat to be dissipated, the heat capacity of the heat sink can be increased in a simple manner by virtue of the fact that the thermal bonding surfaces are solid metal bodies, preferably cuboids or cylinders. With this configuration, the heat transfer between a component to be cooled and the heat sink can be increased.

The solid metal body can be connected with little effort by gluing or soldering with the heat sink.

By pressing the massive metal body in recesses of the heat sink, the metal body can be connected without additives to the heat sink.

According to another embodiment, the heat sink is relatively simple if the heat sink has recesses for components of the actuator. Through these recesses, the Heat sink is guided around the components and can maintain a substantially flat shape, which allows a simple structure and easier production.

The function as a heat sink is further improved when the metal body has webs, which are in contact with the metallic housing part so as to dissipate the heat in housing parts. The webs can be angled at any angle to the heat sink. The housing may also have recordings, in which engage the webs.

In order to ensure a reliable heat dissipation into the housing even under harsh operating conditions, the webs are formed according to an advantageous embodiment such that they are under bias to the housing in contact. A bias voltage is already achieved when the end of the webs L-, U- or V-shaped is bent. The bias is generated by the spring action of the end. The bias can be done in another embodiment by the shape of the receptacle of the housing. For this purpose, the recording can be configured, for example with insertion bevels. Such a shape is also easy to produce.

In one embodiment, the invention will be described in more detail. It shows in

1 is a partial section of an actuator according to the invention,

Fig. 2, 3 further sections of the actuator of FIG. 1 and

4 shows the heat sink according to FIG. 1.

1 shows a part of a housing 1 made of aluminum of an actuator in a motor vehicle with an actuator 2, wel Ches via a shaft 3, gears 4 - 6, by a pinion 7 of an electric motor 8 is driven. The electric motor 8 is arranged in a chamber of the housing 1. An artificial material cover 9 is connected to the housing 1, the synthetic material cover 9 covering the area of the electric motor 8 and the toothed wheels 4-6. For controlling the electric motor 8 as a function of the position of the actuator 2, an electronics 10 is present. The electronics 10 consists of a printed circuit board 11 with electrical components 12 arranged thereon. Between the gears 4 - 6 and the electronics 10, a metal body acting as a heat sink 13 is arranged. In the area of the shafts of the gears 4 - 6, the heat sink 13 has recesses 14, 15. A tab 16 of the heat sink 13 is in contact with the electronics 10 as a thermal connection surface under prestress.

Figure 2 shows the housing 1 with the plastic cover 9. To attach the electronics 10 in the plastic cover 9 9 dome 17, 18 are molded onto the plastic cover, with which the electronics 10 is connected or clipped. The thermal connection of the heat sink 13 to the electronics 10 via the tab 16 and convex in the direction of the electronics 11 curved area 19. Figure 3 shows the heat sink 13 with webs 20, 21, which in

Angled 90 ° angle of the heat sink 13 and are guided to the housing 1 of the actuator. The ends of the webs 20, 21 are bent in a U-shape to produce a wide support surface for the heat transfer and at the same time a bias voltage with which the heat sink 13 presses with its convex portion 19 against the heat transfer surfaces 22.

All embodiments of FIGS. 1-3 is common that the heat sink 13 arranged at lower thermal stresses in the plastic cover 9, preferably encapsulated, be can. The connection of the electronics 10 via the tab 16 and / or the curved portion 19th

Finally, FIG. 4 shows the heat sink 13 in a perspective view from above. The heat sink 13 is a metal body made by punching from a metal sheet. The heat sink 13 has two webs 20, 21 angled downward by 90 ° for connection to the metal housing. An upwardly bent tab 16 and convexly upwardly curved portions 19 form the thermal bonding surfaces. The heat sink 13 further has two recesses 14, 15 in which components of the actuator can engage. As a result of the recesses 14, 15, the heat sink can have a substantially planar shape, whereby the heat sink 13 can be easier to produce as a stamped part.

Claims

Actuator comprising a metal housing consisting of a plurality of housing parts, an electric motor, an actuator, a transmission mechanism adapting the movement of the electric motor to the actuator, and electronics for controlling the electric motor, characterized in that at least one housing part (9) is made of plastic in that area the plastic housing part (9) is a heat sink (13) is arranged, that the heat sink (13) thermal Anbin- surfaces (16, 19) for the electronics (10) has and that the heat sink (13) with a metallic housing part ( 1) is connected.
Actuator according to claim 1, characterized in that the housing part is a plastic cover (9).
Actuator according to claim 1, characterized in that the heat sink (13) is a metal body.
Actuator according to claim 3, characterized in that the metal body (13) contains at least one metal with good thermal conductivity, preferably copper or aluminum.
Actuator according to at least one of the preceding claims, characterized in that the electronics (10) heat transfer surfaces which are connected to the thermal bonding surfaces (16, 19) of the heat sink (13).
6. Actuator according to claim 5, characterized in that the heat transfer surfaces are arranged in the vicinity of highly heat-producing electrical components of the electronics (10).
7. Actuator according to at least one of the preceding claims, characterized in that the thermal bonding surfaces (16, 19) have an electrically non-conductive coating.
8. Actuator according to at least one of the preceding claims, characterized in that the thermal bonding surfaces are formed as convex in the direction of the electronics curved areas (19).
9. Actuator according to at least one of the preceding claims 1 to 7, characterized in that the thermal bonding surfaces are in the direction of the electronics curved tabs (16).
10. The actuator according to claim 1, wherein the thermal bonding surfaces are solid metal bodies, preferably cuboids or cylinders.
11. Actuator according to claim 10, characterized in that the solid metal body with the heat sink (13) are connected by means of gluing or soldering.
12. Actuator according to claim 10, characterized in that the solid metal bodies are pressed into recesses of the heat sink (13).
13. Actuator according to at least one of the preceding claims, characterized in that the Heat sink (13) webs (20, 21) has, which are in contact with the me-metallic housing part (1).
14. Actuator according to claim 13, characterized in that the webs (20, 21) are formed such that they are in pretension with the metallic housing part in contact.
15. Actuator according to at least one of the preceding claims, characterized in that the heat sink (13) recesses (14, 15), in the construction parts of the actuator intervene.
16. Actuator according to at least one of the preceding claims, characterized in that the heat sink (13) in the plastic cover (9) is arranged.
EP13805856.5A 2012-12-14 2013-12-12 Actuator Withdrawn EP2932581A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102012223297 2012-12-14
PCT/EP2013/076378 WO2014090946A2 (en) 2012-12-14 2013-12-12 Actuator

Publications (1)

Publication Number Publication Date
EP2932581A2 true EP2932581A2 (en) 2015-10-21

Family

ID=49766079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13805856.5A Withdrawn EP2932581A2 (en) 2012-12-14 2013-12-12 Actuator

Country Status (4)

Country Link
US (1) US20150333603A1 (en)
EP (1) EP2932581A2 (en)
CN (1) CN104838569A (en)
WO (1) WO2014090946A2 (en)

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FR3032314B1 (en) * 2015-02-04 2017-01-20 Mmt Sa Positioning actuator and method of manufacturing
CN107923546A (en) * 2015-08-31 2018-04-17 日立汽车系统株式会社 driver and driver integrated electric actuator
DE102016212668A1 (en) 2016-07-12 2018-01-18 Mahle International Gmbh locking device
CN106523766A (en) * 2016-12-29 2017-03-22 天津特克执行器有限公司 High-strength anticorrosive all-plastic casing actuator

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JP2668919B2 (en) * 1988-03-11 1997-10-27 松下電器産業株式会社 Blower motor
DE20117795U1 (en) * 2001-10-31 2002-03-07 Trw Automotive Electron & Comp Drive unit for actuating a parking brake in a vehicle
JP2003182606A (en) * 2001-12-17 2003-07-03 Toyoda Mach Works Ltd Electric power steering system
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JP4275614B2 (en) * 2004-12-10 2009-06-10 三菱電機株式会社 Rotating electric machine for vehicles
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Also Published As

Publication number Publication date
WO2014090946A3 (en) 2015-03-19
US20150333603A1 (en) 2015-11-19
WO2014090946A2 (en) 2014-06-19
CN104838569A (en) 2015-08-12

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