EP4118735A1 - Dispositif d'entraînement pour un dispositif de freinage d'un véhicule automobile - Google Patents

Dispositif d'entraînement pour un dispositif de freinage d'un véhicule automobile

Info

Publication number
EP4118735A1
EP4118735A1 EP21709957.1A EP21709957A EP4118735A1 EP 4118735 A1 EP4118735 A1 EP 4118735A1 EP 21709957 A EP21709957 A EP 21709957A EP 4118735 A1 EP4118735 A1 EP 4118735A1
Authority
EP
European Patent Office
Prior art keywords
drive device
rotor
carrier element
electrical machine
latching
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
EP21709957.1A
Other languages
German (de)
English (en)
Inventor
Eduard Maiterth
Lothar Detels
Klaus Lerchenmueller
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.)
Robert Bosch GmbH
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 EP4118735A1 publication Critical patent/EP4118735A1/fr
Pending legal-status Critical Current

Links

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
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/22—Optical devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • 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
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • 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
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • 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
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • 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

Definitions

  • the invention relates to a drive device for a braking device of a motor vehicle, with an electrical machine having a housing, which has a rotor rotatably mounted in the housing, and with a rotor position sensor device, which has a circuit board with at least one sensor element assigned to the rotor, the circuit board being shaped like a circular ring and is arranged coaxially to an axis of rotation of the rotor.
  • the drive device with the features of claim 1 has the advantage that a particularly simple installation of the rotor position angle sensor on the electrical machine is provided in a cost-effective and advantageous manner, which also enables different expansion coefficients to be compensated in a simple manner.
  • the circuit board of the drive device is fastened in or on the electrical machine by at least one latching connection, in particular comprising plastic.
  • the latching connection enables a particularly simple assembly of the printed circuit board on the drive device or the electrical machine, which can also be detached if necessary.
  • the locking connection is designed as a non-destructive detachable locking connection.
  • the latching connection is designed as a latching connection which can only be released by destruction and which ensures a particularly high level of security against unintentional loosening.
  • the locking connection preferably creates a play between the printed circuit board and the electrical machine, which ensures that changes in length that occur in the event of temperature fluctuations due to different coefficients of thermal expansion do not lead to mechanical stresses in the electrical machine.
  • the circuit board is preferably preassembled on an annular carrier element and the carrier element forms the latching connection together with the electrical machine.
  • the pre-assembly enables simple and secure attachment of the circuit board to the carrier element and the latching connection enables simple assembly of the carrier element with the circuit board in or on the electrical machine.
  • the circuit board is screwed, glued or clamped to the carrier element, for example, which takes place in particular outside the electrical machine, which further simplifies assembly.
  • the carrier element preferably has at least one axially protruding and elastically deformable latching nose which, in the assembled state, engages behind a holding section of the electrical machine.
  • the Latching lug pushed through an opening of the holding section with elastic deformation of the latching lug, so that it returns to its original shape after penetrating the opening due to its inherent elasticity and thereby engages behind the holding section of the electrical machine, whereby the carrier element is positively attached to the electrical machine.
  • the electrical machine preferably has a bearing plate, by means of which the rotor of the electrical machine is rotatably mounted in the housing, and which forms the holding section.
  • a bearing plate by means of which the rotor of the electrical machine is rotatably mounted in the housing, and which forms the holding section.
  • one or more end shields are fastened in the housing of the electrical machine, for example braced or screwed, and thereby create a wall in the housing that is in particular aligned perpendicular to the axis of rotation of the rotor.
  • an opening is formed in the end shield, through which the rotor shaft is passed, and in which rolling element bearing is usually held, the inner ring of which is held non-rotatably with the rotor shaft and the outer ring of which is held fixed to the housing on the end shield.
  • the holding section is preferably designed to be integrated into such a bearing plate, so that the latching connection acts between the carrier element and the bearing plate. This enables the rotor position sensor device to be advantageously arranged close to the electrical machine directly on the end shield.
  • the carrier element has three latching lugs which are arranged distributed uniformly over the circumference of the carrier element, the end shield having three holding sections which interact with the latching lugs.
  • the respective holding section for the respective latching lugs has a depression or a recess into which the latching lug can be inserted under elastic deformation in order to engage behind the respective holding section.
  • the carrier element preferably has only three latching lugs, which are arranged distributed uniformly over the circumference of the carrier element.
  • the carrier element optionally has more than three latching lugs.
  • the latching lugs are preferably mounted on the respective holding section, in particular each in a recess of the respective holding section, so as to be radially displaceable, relative to the axis of rotation of the rotor.
  • the locking lugs can thus be displaced radially in the bearing plate, which is arranged coaxially with respect to the rotor shaft.
  • the respective latching lug can move radially outward if, for example, the material of the carrier element experiences a greater increase in size than the bearing plate due to the coefficient of thermal expansion of the carrier element.
  • the latching lugs and holding sections are arranged distributed uniformly over the bearing plate or the carrier element, so that they are each aligned at an angle of 120 ° to one another.
  • the carrier element can thus experience an increase in diameter or change without it being displaced or twisted as a result in the circumferential direction.
  • the rotor position sensor device always remains optimally aligned with respect to the rotor of the electrical machine.
  • the respective holding section preferably has a recess which is designed in the form of an elongated hole and which extends radially or is radially aligned in its longitudinal extent.
  • the locking lugs are guided so that they can be moved radially through the elongated hole shape.
  • the radial guide ensures that twisting or tilting of the carrier element and thus of the rotor position sensor device is reliably prevented.
  • the latching lugs preferably have a rectangular or circular cross section for radial displacement at the respective recess, the cross section having a long side and a short side, and the long side being aligned parallel to a radial.
  • the locking lugs thus work together with the recesses as a centering device which has radial play.
  • the diameter of the carrier element change without changing the alignment of the rotor position sensor to the electrical machine.
  • the carrier element is preferably made of plastic. This enables an inexpensive implementation of the carrier element, which in particular allows the latching lugs to be formed in one piece with the carrier element and thereby further simplifies assembly.
  • the respective holding section of the end shield, in particular the end shield as a whole, is preferably made of metal in order to ensure a particularly robust design.
  • each latching lug is slotted in its radial longitudinal extension so that each latching lug has two latching lug sections which, when inserted into the holding section, can be moved towards one another with elastic deformation.
  • the latching nose sections are supported on one another, which ensures a particularly secure latching connection.
  • each locking lug is thereby held in a self-supporting manner on the respectively associated holding section.
  • FIG 1 is a simplified representation of an advantageous
  • FIG. 2 shows a bearing plate of the drive device with a carrier element in a perspective exploded view
  • Figure 3 shows a detailed view of the end shield and support element
  • Figure 4 is a schematic plan view of the end shield.
  • Figure 1 shows a simplified representation of an advantageous drive device 1 for a consumer, not shown here Braking device of a motor vehicle.
  • the braking device is, for example, a parking brake of the motor vehicle and the consumer is an axially displaceable brake piston which interacts with a brake disc of a wheel of the motor vehicle.
  • the drive device 1 has an electrical machine 2 with a drive shaft 3, a rotor 4 being non-rotatably arranged on the drive shaft and the drive shaft 3 being rotatably mounted in a housing 5, which is only indicated here.
  • Stator 6 or rotor 5 have a particularly multi-phase drive winding to which an electrical voltage can be applied by power electronics (not shown here) in order to generate a rotating magnetic field through which the electrical machine 2 generates a torque that is transmitted from the drive shaft 3 to the consumer 2 is transmitted.
  • the drive shaft 3 is permanently coupled to the consumer, for example, or can be coupled for a desired period of time.
  • a rotor position sensor device 7 is assigned to the rotor 4 of the electrical machine 2 and continuously monitors a rotor angular position of the rotor 4 during operation by means of induction.
  • the rotor position sensor device 7 has a printed circuit board 8 which, according to the present exemplary embodiment, is designed in the form of a circular ring disk and is assigned to an end face of the rotor 4 coaxially with the drive shaft 3.
  • the printed circuit board 8 carries a rotor angle position sensor 12 on its front side 9 facing the rotor 4 electronic evaluation unit 11, such as an analog ASIC, which operates the coils.
  • the evaluation unit 11 is also arranged on the front side 9 of the printed circuit board 8 facing the rotor 4, next to the coils of the rotor angle position sensor 12.
  • a modulated signal is applied to the transmitter coil, which signal is induced in the rotor 4 and conducted back from the rotor 4 to the receiver coil.
  • the received signal is processed by the evaluation unit 11 demodulated and evaluated in order to determine a current rotor angle position.
  • the rotor position sensor 8 is thus designed in the manner of a resolver.
  • the printed circuit board 8 is fastened to a carrier element 13 which is designed in the shape of a circular ring.
  • the carrier element 13 is assigned to an end face of the rotor 4 coaxially to the drive shaft 3 and is held on a bearing plate 14.
  • the end shield 14 extends from a casing jacket wall 15 of the housing 5 radially inward in the direction of the drive shaft 3.
  • the drive shaft 3 is advantageously rotatably mounted on the housing 5.
  • the carrier element 13 is fastened to the bearing plate 14.
  • FIG. 2 shows a perspective exploded view of the bearing plate 14 and the carrier element 13.
  • the carrier element 13 On its end face 3 facing the bearing plate 14, the carrier element 13 has axially protruding locking lugs 18 spaced evenly over the circumference of the carrier element 13.
  • the end plate 14 has three holding sections 20 in an end face 19, which are designed to correspond to the latching lugs 18 in the end plate 14.
  • a recess 21 is formed in each holding section 20, which recess serves to receive one of the latching lugs 18 in each case.
  • FIG. 3 shows, in a simplified detailed view, the operating principle of the respective latching connection 17.
  • FIG. 3 shows a sectional view of one of the latching connections 17 in the not yet connected state.
  • Each latching lug 18 of the carrier element 13 has a rectangular cross section and two laterally protruding latching projections 22 on its free end side.
  • the respective latching lug 18 is slotted so that a longitudinal cut 23 lies between the latching projections 22.
  • This slot 23 is made so wide that the latching nose sections produced by the slot 23 can be moved towards one another, as shown by arrows 24 in FIG.
  • the distance between the locking projections 22 is greater than the clear width of the respective recess 21 in the end shield 14.
  • the locking projections 22 are supported by their respective run-up bevels 25, which are attached to the holding section 20 of the end shield 14 hits, moved towards each other with elastic deformation, so that the locking lug 18 can penetrate completely into the recess 21 until the locking projections 22 have completely penetrated the recess 21 in order to spring radially outward again behind it, whereby the end shield 14 on the holding section 20 is positively engaged from behind by the respective latching lug 18.
  • a further exemplary embodiment as shown in FIG. 2, provides that the latching lugs have a circular cross section or a circular contour.
  • FIG. 4 shows a plan view of the bearing plate 14, specifically of the end face facing away from the carrier element 13.
  • the recesses 21 are each formed in the shape of an elongated hole or rectangular, their longitudinal extension extending radially to the center Z of the end shield 14 or to the axis of rotation of the drive shaft 3. Because the recess 21 is also arranged distributed uniformly over the circumference of the end face of the bearing plate 14, they are each at an angle of 120 ° to one another, corresponding to the locking projections 18.
  • the locking lug 18 is mounted in the associated recess 21 so as to be radially displaceable, as indicated by double arrows 26 in FIG. Even in the locked state of the carrier element 18 on the bearing plate 14, there is radial play through which the orientation of the carrier element 13 on the bearing plate 14 does not change despite the different thermal expansion coefficients of the carrier element 13 and the bearing plate 14. In particular, rotation about the center Z is advantageously avoided by the advantageous latching device.
  • the rotor position sensor 8 is held in position in such a way that it permanently has a stable and precisely positioned position with respect to the electrical machine 2 and sufficient tolerance compensation is ensured in the radial direction.
  • the carrier element 13 is preferably made of plastic and the bearing plate 14 is made of metal, with the plastic carrier element 13 reliably preventing an electrically conductive connection between the rotor position sensor and the bearing plate 14.
  • the latching device also offers a permanent tight fit over the entire service life of the drive device 1 under the most varied of temperature conditions.
  • the advantageous alignment of the recesses 21 and locking projections 18 ensures that the carrier element 13 is held in the center of rotation of the drive shaft 3 or of the rotor 3 over the entire temperature range.
  • the drive device 1 is mounted simply by bringing the carrier element 18 together on the bearing plate 14 with elastic deformation of the
  • Locking projections ensure that, given different thermal expansions of the materials used, a slight radial sliding of the locking lugs 18 in the respective recess 21 is made possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transportation (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

L'invention concerne un dispositif d'entraînement (1) pour un dispositif de freinage d'un véhicule automobile, ledit dispositif d'entraînement comprenant : une machine électrique (2) qui comporte un boîtier (5) et un rotor (4) monté rotatif dans le boîtier (5); et un dispositif de capteur de position de rotor (7) qui comporte une carte de circuit imprimé (8) comportant au moins un élément capteur associé au rotor (4), la carte de circuit imprimé (8) se présentant sous la forme d'un disque circulaire et étant positionnée de manière coaxiale par rapport à un axe de rotation du rotor (4). Selon l'invention, la carte de circuits imprimés (8) est fixée dans ou sur la machine électrique (2) au moyen d'au moins une liaison de verrouillage (17).
EP21709957.1A 2020-03-13 2021-03-03 Dispositif d'entraînement pour un dispositif de freinage d'un véhicule automobile Pending EP4118735A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020203274.2A DE102020203274A1 (de) 2020-03-13 2020-03-13 Antriebseinrichtung für eine Bremsvorrichtung eines Kraftahrzeugs
PCT/EP2021/055306 WO2021180534A1 (fr) 2020-03-13 2021-03-03 Dispositif d'entraînement pour un dispositif de freinage d'un véhicule automobile

Publications (1)

Publication Number Publication Date
EP4118735A1 true EP4118735A1 (fr) 2023-01-18

Family

ID=74858436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21709957.1A Pending EP4118735A1 (fr) 2020-03-13 2021-03-03 Dispositif d'entraînement pour un dispositif de freinage d'un véhicule automobile

Country Status (7)

Country Link
US (1) US20230033633A1 (fr)
EP (1) EP4118735A1 (fr)
JP (1) JP7488907B2 (fr)
KR (1) KR20220154718A (fr)
CN (1) CN115191076A (fr)
DE (1) DE102020203274A1 (fr)
WO (1) WO2021180534A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021211367A1 (de) 2021-10-08 2023-04-13 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Elektromotor eines Nebenaggregats eines Kraftfahrzeugs
US20240223042A1 (en) * 2022-12-30 2024-07-04 Black & Decker Inc. Compact outer-rotor brushless motor for a power tool

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01116566U (fr) * 1988-01-29 1989-08-07
JPH02119553A (ja) * 1988-10-27 1990-05-07 Mitsubishi Electric Corp モータの検知装置
DE3842588A1 (de) * 1988-12-17 1990-06-21 Mulfingen Elektrobau Ebm Kollektorloser aussenlaeufermotor mit halbleiter-kuehlungsanordnung
EP0645875B2 (fr) * 1993-09-08 2001-01-03 Siemens Aktiengesellschaft Groupe moto-pompe, en particulier dispositif d'antiblocage de frein pour véhicules automobiles
JPH09182403A (ja) * 1995-12-22 1997-07-11 Nippon Seiko Kk ブラシレスモータ
US6020660A (en) * 1997-12-10 2000-02-01 General Electric Company Dynamoelectric machine
JP2016512948A (ja) * 2013-03-25 2016-05-09 ピアーブルグ パンプ テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツングＰｉｅｒｂｕｒｇ Ｐｕｍｐ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ 車両用電子流体ポンプ
JP7051621B2 (ja) * 2018-07-06 2022-04-11 株式会社ミツバ ブラシレスモータ

Also Published As

Publication number Publication date
CN115191076A (zh) 2022-10-14
JP7488907B2 (ja) 2024-05-22
WO2021180534A1 (fr) 2021-09-16
US20230033633A1 (en) 2023-02-02
JP2023518166A (ja) 2023-04-28
DE102020203274A1 (de) 2021-09-16
KR20220154718A (ko) 2022-11-22

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