EP4291793A1 - Unité d'entraînement électromotrice pour applications de véhicule automobile - Google Patents

Unité d'entraînement électromotrice pour applications de véhicule automobile

Info

Publication number
EP4291793A1
EP4291793A1 EP22708289.8A EP22708289A EP4291793A1 EP 4291793 A1 EP4291793 A1 EP 4291793A1 EP 22708289 A EP22708289 A EP 22708289A EP 4291793 A1 EP4291793 A1 EP 4291793A1
Authority
EP
European Patent Office
Prior art keywords
output shaft
drive unit
webs
unit according
section
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.)
Pending
Application number
EP22708289.8A
Other languages
German (de)
English (en)
Inventor
Frank Kunst
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.)
Kiekert AG
Original Assignee
Kiekert AG
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 Kiekert AG filed Critical Kiekert AG
Publication of EP4291793A1 publication Critical patent/EP4291793A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • 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
    • H02K7/003—Couplings; Details of shafts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/02—Power-actuated vehicle locks characterised by the type of actuators used
    • E05B81/04—Electrical
    • E05B81/06—Electrical using rotary motors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/24—Power-actuated vehicle locks characterised by constructional features of the actuator or the power transmission
    • E05B81/32—Details of the actuator transmission
    • E05B81/34—Details of the actuator transmission of geared transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/104—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting only by friction
    • 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
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/12—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators
    • E05B81/14—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators operating on bolt detents, e.g. for unlatching the bolt

Definitions

  • the invention relates to an electromotive drive unit for motor vehicle applications, with an electric motor with an output shaft that is essentially circular in cross section, and with a drive element mounted on the output shaft, preferably made of plastic, for example as part of a transmission, the output shaft being inserted into a receiving bore of the drive element by definition engages at least one vent hole.
  • Such electromotive drive units for motor vehicle-technical applications are used by way of example and not restrictively as actuators in or on motor vehicle locks, for adjusting motor vehicle seats, headlights, mirrors or in connection with window regulators. Consequently, the electric motor of the relevant electromotive drive unit is typically operated with a low direct current of 12 V, 24 V or also 48 V.
  • rotary movements of the fast-running output shaft of the electric motor are translated using the usually provided and downstream gearbox, which usually includes the drive element.
  • the drive element as such can be, for example, a worm which, together with a worm wheel, forms and defines the gear mechanism in question.
  • Such worm gears are generally known in connection with motor vehicle applications, for which reference is only made to DE 10 2009 036 834 A1 or DE 103 60 419 A1 as an example.
  • output shafts that have a D-shape in cross section have proven beneficial here.
  • Such a design is also known as a D-cut, as explained in DE 10 2013 010 461 A1, among others.
  • the output shaft is equipped with at least one recess in the form of a groove.
  • the drive element in the form of a worm or a worm wheel with a projection engages in the groove, realizing a form-fitting connection.
  • the groove extends parallel to the axis of rotation of the output shaft.
  • the worm wheel or the worm as a plastic drive element engages in the grooves in question with the help of three projections. In this way, higher forces can also be transmitted overall if the worm or the worm wheel is made of plastic. In addition, this is intended to prevent the output shaft from shifting into the drive element or worm wheel made of plastic during actuation.
  • the electromotive drive unit is used in connection with a CD player mounted inside a motor vehicle.
  • a ventilation hole has also been implemented. In this way, any deformation of the drive element or the worm made of plastic in the engagement area can be reliably prevented. This has basically worked.
  • the state of the art allows for further improvements.
  • the ventilation holes in the generic teaching are relatively small, so that deformations in the drive element or the worm are still and unchanged made of plastic are possible in operation.
  • the coupling between the output shaft and the drive element is realized by a press fit. Under certain circumstances, such a press fit can shear off under high torque stresses or the output shaft can “peel” into the drive element in the engagement area, as already described in DE 102013010461 A1. This is where the invention aims to remedy the situation overall.
  • the invention is based on the technical problem of further developing such an electromotive drive unit for motor vehicle applications in such a way that a perfect non-rotatable coupling is provided without the risk of mechanical damage and at the same time any temperature effects that occur during operation are properly controlled.
  • the invention proposes in a first variant of a generic electromotive drive unit for motor vehicle applications that the output shaft, at least in the engagement area of the receiving bore, has two spaced-apart webs that extend axially and run like a chord in cross section, between which a Projection of the drive element engages in the rotary coupling and the outer edge side each describe or limit a vent hole.
  • a special configuration of the output shaft is used, at least in the engagement area of the receiving bore of the drive element.
  • the drive element is usually a worm or a worm wheel comparable to the embodiment described and illustrated in DE 10 2013 010 461 A1.
  • the drive element is usually made of plastic, but can also be made of metal.
  • the two webs running along a chord can be spaced apart from one another and form a receptacle between them, into which the projection of the drive element engages for rotary coupling.
  • the two webs can run at an angle to one another. As a rule, however, a parallel course of the two webs to one another is observed.
  • the two webs run in the axial direction at the same distance from the center point of the output shaft, which is designed to be essentially circular in cross section.
  • the chord-like extension of the webs is also manifested in the fact that the webs end at the head end on a circumference of the output shaft, which is essentially circular in cross section.
  • the two webs can be connected to one another by an arch. As a result, the two webs together with the arch form a composite U-web.
  • the projection on the drive element now engages in this U-web of the output shaft in the engagement area of the receiving bore. This is usually done with a force fit to implement the slewing ring and mostly even with a force fit and form fit. Accordingly, the projection has a shape complementary to the U-web or the receptacle formed in the interior, in the form of a U-shaped projection. In this way, a particularly secure rotary coupling is provided between the U-shaped projection on the drive element on the one hand and the U-shaped design of the output shaft in the receiving area on the other hand.
  • This venting bore appears practically automatically, namely starting from the outer edge of the respective web up to the inner edge of the receiving bore in the engagement area that accommodates the output shaft or the U-web running in the axial direction.
  • These two ventilation bores formed on the outer edge of the webs are generally designed in the form of a segment of a circle in cross section.
  • the two ventilation holes usually have the same size in cross section.
  • the ventilation bores are regularly arranged mirror-symmetrically to an axis running through the center point of the output shaft, which is essentially circular in cross section.
  • Comparable vent holes are also observed in a further second variant of the invention.
  • the output shaft has a D-shaped extension, at least in the engagement area of the receiving bore, with ventilation bores on the outer wall in each case.
  • the vent holes can be constructed in a similar way as before and offer similar advantages.
  • ther moplastics are used, such as PMMA (polymethyl methacrylate), PA (polyamide), PBT (polybutylene terephthalate), POM (polyoxymethylene) or also PC (polycarbonate).
  • PMMA polymethyl methacrylate
  • PA polyamide
  • PBT polybutylene terephthalate
  • POM polyoxymethylene
  • PC polycarbonate
  • the invention also relates to a motor vehicle lock and in particular a motor vehicle door lock which is advantageously equipped with an electromotive drive unit of the design described at the outset.
  • the drive unit can be used to realize and implement individual functional positions such as "locked” or "anti-theft".
  • electromotive drive units can be used and used as closing devices in connection with motor vehicle locksmiths. They can also be used as locking drives in conjunction with locking actuators in electric charging devices for electric or hybrid vehicles and are used.
  • Fig. 1 an electric motor drive unit for automotive engineering
  • FIG. 3 shows a section through the object according to FIG. 2,
  • Fig. 5 shows a section through the object according to Fig. 4.
  • the electromotive drive unit for motor vehicle technical applications is shown.
  • the electromotive drive unit is used in connection with a motor vehicle lock and in particular a motor vehicle door lock.
  • the electromotive drive unit is designed as an opening drive for a locking mechanism 1 , 2 made up of rotary latch 1 and pawl 2 , shown schematically there.
  • the electromotive drive unit works on a release lever 3.
  • the release lever 3 is applied using the electromotive drive unit in such a way that the release lever 3 pivots clockwise about its axis.
  • the electromotive drive unit has an electric motor 4 and, in cross section, an essentially circular output shaft 5, which is provided on the output side of the electric motor 4 and is set with its help in high-speed rotations.
  • a drive element 6 is mounted on the output shaft 5 .
  • the drive element or the worm 6 made of plastic is not just a part of the transmission 6 , 7 , 8 .
  • the drive element or the worm 6 is also mounted on the output shaft 5, according to the exemplary embodiment slipped onto the output shaft 5 and optionally additionally secured axially thereon. This can be done, for example, by additionally applying adhesive or in some other way.
  • the output shaft 5 engages in a receiving bore 9 inside the drive element or the worm 6 .
  • the mounting hole 9 is arranged according to the embodiment in the center of the cylindrical worm formed from 6 and extends in the axial direction.
  • FIGS. 2 and 4 show that the output shaft 5 engages in the worm 6 over a certain axial length, namely with the definition of an engagement area E.
  • ventilation holes 10 on both sides are defined, which can best be understood from the illustration in FIGS.
  • the projection 13 generally engages in the U-web 11 , 12 in a non-positive and positive manner.
  • the projection 13 is designed to be complementary to the U-web 11 , 12 and is consequently designed as a U-shaped projection 13 .
  • the ventilation bores 10 are designed in the form of a segment of a circle in cross section.
  • the two ventilation bores 10 have the same cross section and are otherwise arranged mirror-symmetrically with respect to an axis A running through the center point M of the output shaft 5 .
  • the drive element or the worm 6 (and also the worm wheel 7) is generally made of a thermoplastic material. Plastics such as polyamide and in particular homopolyamide have proven to be particularly favorable here.
  • the output shaft 5 of the electric motor 4 is generally made of metal. To combine the worm 6 with the output shaft 5, the latter is pushed onto the output shaft 5 in such a way that there is a positive connection in the direction of rotation of the output shaft 5. The two webs 11 or the U-web 11, 12 in the engagement area E of the receiving bore 9 of the worm 6 is produced on the output shaft 5, as a rule, by reshaping the output shaft 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne une unité d'entraînement électromotrice pour des applications de véhicule automobile, ladite unité d'entraînement étant équipée d'un moteur électrique (4) comprenant un arbre de sortie (5), qui présente une section transversale sensiblement circulaire, et d'un élément d'entraînement (6), qui est de préférence en matière plastique et qui est assemblé sur l'arbre de sortie (5). L'arbre de sortie (5) vient en prise dans un alésage de réception (9) de l'élément d'entraînement (6), définissant ainsi au moins un alésage de ventilation (10). Selon l'invention, une variante de l'arbre de sortie (5) présente deux bandes (11) mutuellement espacées qui s'étendent axialement à la manière d'une corde au moins dans la zone de mise en prise (E) de l'alésage de réception (9). Une saillie (13) de l'élément d'entraînement (6) vient en prise entre les bandes (11) pour produire un accouplement rotatif. Chacune des deux bandes (11) décrit en outre un alésage de ventilation (10) respectif sur le bord extérieur.
EP22708289.8A 2021-02-15 2022-01-26 Unité d'entraînement électromotrice pour applications de véhicule automobile Pending EP4291793A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021103444.2A DE102021103444A1 (de) 2021-02-15 2021-02-15 Elektromotorische Antriebseinheit für kraftfahrzeug-technische Anwendungen
PCT/DE2022/100065 WO2022171233A1 (fr) 2021-02-15 2022-01-26 Unité d'entraînement électromotrice pour applications de véhicule automobile

Publications (1)

Publication Number Publication Date
EP4291793A1 true EP4291793A1 (fr) 2023-12-20

Family

ID=80683110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22708289.8A Pending EP4291793A1 (fr) 2021-02-15 2022-01-26 Unité d'entraînement électromotrice pour applications de véhicule automobile

Country Status (7)

Country Link
US (1) US20240125153A1 (fr)
EP (1) EP4291793A1 (fr)
JP (1) JP2024507175A (fr)
KR (1) KR20230144043A (fr)
CN (1) CN117062995A (fr)
DE (1) DE102021103444A1 (fr)
WO (1) WO2022171233A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2745609B1 (fr) * 1996-03-04 1998-05-29 Ecia Equip Composants Ind Auto Attache rapide de type a baionnette
DE10360419A1 (de) 2003-12-19 2005-07-21 Brose Schließsysteme GmbH & Co.KG Motorbaugruppe eines elektromotorischen Stellantriebs
JP2005265169A (ja) 2004-03-22 2005-09-29 Matsushita Electric Ind Co Ltd ウォームギヤ
US7070357B2 (en) * 2004-06-07 2006-07-04 Eastman Kodak Company D-shaped slot having a relief
DE102006015695A1 (de) 2006-03-28 2007-10-18 Areva Energietechnik Gmbh Schaltwelle für eine elektrische Schalteinrichtung
DE102009036834A1 (de) 2009-08-10 2011-02-17 Kiekert Ag Stelleinheit für kraftfahrzeugtechnische Anwendungen
IT1397779B1 (it) * 2010-01-15 2013-01-24 Comparato Nello S R L Sistemi Idrotermici Accoppiamento tra camma e albero di uscita di un motoriduttore ad ingranaggi per controllare l'apertura e la chiusura di valvole in impianti idraulici e/o idrotermici
DE102011089083A1 (de) 2011-12-19 2013-06-20 Continental Automotive Gmbh Kraftstoffpumpe
DE102013010461A1 (de) 2013-06-22 2014-12-24 Kiekert Aktiengesellschaft Motor mit Schneckenrad und Verfahren
DE102014202909A1 (de) 2014-02-18 2015-08-20 Robert Bosch Gmbh Laufrad und Welle einer Benzinpumpe
DE102015102137A1 (de) 2015-02-13 2016-08-18 Dorothea Becker Positionieren von Hülsensegmenten

Also Published As

Publication number Publication date
CN117062995A (zh) 2023-11-14
US20240125153A1 (en) 2024-04-18
WO2022171233A1 (fr) 2022-08-18
JP2024507175A (ja) 2024-02-16
DE102021103444A1 (de) 2022-08-18
KR20230144043A (ko) 2023-10-13

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