EP2520009A2 - Entraînement électrique à transmission à vis sans fin - Google Patents

Entraînement électrique à transmission à vis sans fin

Info

Publication number
EP2520009A2
EP2520009A2 EP10778950A EP10778950A EP2520009A2 EP 2520009 A2 EP2520009 A2 EP 2520009A2 EP 10778950 A EP10778950 A EP 10778950A EP 10778950 A EP10778950 A EP 10778950A EP 2520009 A2 EP2520009 A2 EP 2520009A2
Authority
EP
European Patent Office
Prior art keywords
shaft
rotor
electric drive
worm
motor
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Withdrawn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
EP10778950A
Other languages
German (de)
English (en)
Inventor
Guenter Kastinger
Mario Huesges
Andreas Saum
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 EP2520009A2 publication Critical patent/EP2520009A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
    • H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
    • 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
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • 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
    • H02K7/08—Structural association with bearings
    • H02K7/081—Structural association with bearings specially adapted for worm gear drives

Definitions

  • Electric drives for example for use in motor vehicles, often include an electric drive motor and a reduction or Vorlegegetriebe.
  • By appropriate adaptation of the drive motor and gearbox to each other can be electrical drives in different power ranges, with different usable speeds and torques and in different external dimensions produced.
  • a rotor of the electric drive motor and a worm shaft of a worm gear run on a common shaft.
  • the common shaft is usually mounted on both sides of the electric drive motor with shaft bearings.
  • a third bearing exists at the end of the common shaft facing the worm shaft.
  • an electric drive comprises a worm gear with a worm shaft and an electric drive motor with a rotor.
  • the rotor and the worm shaft are arranged on axial sections of a shaft.
  • the electric drive comprises two shaft bearings bearing shaft, of which only one is arranged in the vicinity of the rotor on the shaft.
  • the shaft bearing which is not in the vicinity of the rotor, may be arranged on a side of the worm shaft facing away from the rotor. This results in two alternative distribution options for the shaft bearing arranged on the shaft in the vicinity of the rotor.
  • this shaft bearing is located between the rotor and the worm shaft. The end of the worm shaft, on which the rotor is arranged, is thereby supported only on one side (also: "flying" or "free”), so that a space required for the electric drive can be reduced.
  • the bearing may be arranged on a side of the rotor remote from the worm shaft.
  • the electric drive motor may be a brushless DC motor.
  • Such a motor requires less space along the shaft, which can lead to a further space reduction for the electric drive.
  • the electric drive may further comprise a housing in which the shaft bearings and a stator of the electric drive motor are mounted.
  • a housing in which the shaft bearings and a stator of the electric drive motor are mounted.
  • a sensor for determining a rotational position of the rotor can be mounted in the housing.
  • a sensor can be used in particular in connection with a brushless DC motor as an electric drive motor to perform an electrical control of the brushless DC motor.
  • the sensor is protected against harmful environmental influences, such as heat, vibration and dust.
  • Figure 1 shows an electric drive with brushless electric motor
  • Figure 2 shows a variant of the electric drive of Figure 1
  • Figure 3 show an electric drive with commutated electric motor.
  • FIG. 1 shows an electric drive 100 with a brushless electric motor.
  • the electric drive 100 comprises a housing 1 10, in which the components of the electric drive 100 are accommodated.
  • a worm shaft 120 and a worm wheel 130 together form a worm gear 140.
  • a rotor 150 and a stator 160 together form an electric drive motor 170.
  • On a shaft 175, the rotor 150 and the worm shaft 120 are arranged axially one behind the other.
  • a first shaft bearing 180 is disposed on the shaft 175 between the rotor 150 and the worm shaft 120.
  • a second shaft bearing 185 is located at the right end of the shaft, on one side of the worm shaft 120, which faces away from the rotor 150 of the electric drive motor 170.
  • a first position sensor 190 and a second position sensor 195 take a rotational position, a rotational speed and / or a direction of rotation of the rotor 150.
  • the shaft 175 is usually made of steel.
  • the first shaft bearing 180 and the second shaft bearing 185 may, for example, rolling bearings, in particular
  • the worm shaft 120 may be integral with the shaft 175 and the worm thread may be rolled onto the shaft 175 or cut into the shaft 175.
  • the worm thread may be a separate, with the shaft 175 axially or radially composite element.
  • the worm shaft 120 can also consist of a different material than the shaft 175, in particular made of plastic.
  • the material of the worm wheel 130 is selected as a function of the material properties of the worm shaft 120 and the expected forces during operation of the electric drive 100.
  • the worm wheel 130 may also be made of plastic.
  • the electric drive motor 170 is a brushless DC motor with internal rotor 150. This type of electric motor may require less space compared to a commutated DC motor of comparable power, especially in the axial direction. The space requirement in the radial direction can be increased simultaneously compared to the commutated DC motor.
  • the rotor 150 of the electric drive motor 170 may be pressed, shrunk, or otherwise connected to the shaft 175.
  • the rotor 150 carries a number of permanent magnets and optionally a return ring and the stator 160 carries a number of coil windings for generating cooperating magnetic fields.
  • the permanent magnets of the rotor endeavor to align themselves in a specific rotational position with respect to the stator. With proper electrical control of the coils of the stator 160, the rotor 150 rotates about a rotational axis of the shaft 175 in a predetermined direction at a predetermined speed.
  • the rotational position of the rotor 150 can be determined. For example, the first
  • Position sensor 190 and / or the second position sensor 195 are used the. Other than the illustrated mounting positions of the position sensors 190 and 195 between the rotor 150 and the housing 1 10 are also possible and not shown in Figure 1.
  • the coils of the stator 160 are driven in operation of the electric drive 100 based on the determined rotational position of the rotor 150 such that the rotor 150 rotates and drives the shaft 175. Radial and axial forces on the shaft 175 are supported by the shaft bearings 180 and 185 on the housing 1 10.
  • the shaft 175 drives the worm shaft 120, which then moves the worm wheel 130 about its axis of rotation.
  • the electric drive 100 is self-locking, so that when the electric drive motor 170 is switched off, an external torque acting on the worm wheel 130 is not suitable for causing the rotor 150 to rotate.
  • FIG. 2 shows a variant of the electric drive from FIG. 1.
  • the essential difference between the electric drive 100 of FIG. 2 and the electric drive of FIG. 1 is that the first shaft bearing 180 in FIG. 2 is disposed at a left end of the shaft 175 instead of between the worm shaft 120 and FIG
  • the arrangement of the first shaft bearing 180 shown in FIG Shaft 175 by the extended distance between the first shaft bearing 180 and the second shaft bearing 185 to store more accurate and resilient.
  • bending vibrations in the shaft 175 are not passed through the first shaft bearing 180 in this way, so that a resonance frequency of the shaft 175 is reduced with respect to bending vibrations.
  • FIG. 3 shows an electric drive 100 with a commutated electric motor.
  • the embodiment of the electric drive 100 shown in FIG. 3 is used for comparison with the electrical drives 100 from FIGS. 1 and 2.
  • the electric drive motor 170 is commutated, that is, brushes 310 are provided in order to control coils in the interior of the motor electric drive motor 170 in response to a rotational position of the shaft 175 to Taxes.
  • Position sensors 190 and 195 of Figures 1 and 2 are not required for this purpose.
  • the first shaft bearing 180 is located at a left end of the shaft 175 and is supported on an outer casing 320 of the electric drive motor 170.
  • the second shaft bearing 185 is disposed on the shaft 175 between the electric drive motor 170 and the brushes 310.

Landscapes

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

Abstract

L'invention concerne un entraînement électrique, destiné notamment à entraîner un système d'essuie-glace de véhicule et comportant une transmission à vis sans fin dotée d'un arbre hélicoïdal et un moteur électrique pourvu d'un rotor. Le rotor et l'arbre hélicoïdal sont montés sur des parties axiales d'un arbre. En outre, le moteur électrique comprend deux paliers d'arbre supportant l'arbre, dont un seul est disposé sur l'arbre, à proximité du rotor.
EP10778950A 2009-12-30 2010-11-03 Entraînement électrique à transmission à vis sans fin Withdrawn EP2520009A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009055396A DE102009055396A1 (de) 2009-12-30 2009-12-30 Elektrischer Antrieb mit Schneckengetriebe
PCT/EP2010/066686 WO2011079982A2 (fr) 2009-12-30 2010-11-03 Entraînement électrique à transmission à vis sans fin

Publications (1)

Publication Number Publication Date
EP2520009A2 true EP2520009A2 (fr) 2012-11-07

Family

ID=44070517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10778950A Withdrawn EP2520009A2 (fr) 2009-12-30 2010-11-03 Entraînement électrique à transmission à vis sans fin

Country Status (5)

Country Link
US (1) US20130015739A1 (fr)
EP (1) EP2520009A2 (fr)
CN (1) CN102668339A (fr)
DE (1) DE102009055396A1 (fr)
WO (1) WO2011079982A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562949B (zh) * 2011-11-29 2015-07-15 配天(安徽)电子技术有限公司 蜗杆减速器、机器人关节及机器臂
CN106663991B (zh) 2014-07-15 2019-09-06 株式会社美姿把 无刷雨刮电机
WO2016010022A1 (fr) * 2014-07-15 2016-01-21 株式会社ミツバ Moteur d'essuie-glace sans balais, et procédé d'assemblage de celui-ci
DE102015202031A1 (de) * 2015-02-05 2016-08-11 Robert Bosch Gmbh Antriebseinheit für ein Wischersystem
DE102015220900A1 (de) * 2015-10-27 2017-04-27 Robert Bosch Gmbh Wischerdirektantrieb
FR3043967B1 (fr) * 2015-11-25 2019-04-19 Valeo Systemes D'essuyage Plaque de fermeture et dispositif de motorisation d’entrainement d’essuie-glace de vehicule automobile
CN109167482B (zh) * 2018-09-29 2024-07-02 卓越(昆山)自动化技术有限公司 一种电机旋变调零机构
NO345547B1 (en) * 2019-06-27 2021-04-12 Wheel Me As Wormscrew for displacement of wheel
US11993972B2 (en) * 2021-03-05 2024-05-28 Albany Magneto Equipment, Inc. Universal rotary actuators

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH293764A (de) * 1950-08-23 1953-10-15 Cav Ltd Motorgetriebe mit Schneckengetriebe und elektrischem Antriebsmotor.
GB9615316D0 (en) * 1995-11-16 1996-09-04 Lucas Ind Plc Improvements in electric actuators for vehicle powered steering systems
JP4121262B2 (ja) * 2001-10-02 2008-07-23 カヤバ工業株式会社 動力伝達装置の製造方法および電動パワーステアリング装置の製造方法
JP4320587B2 (ja) * 2003-11-28 2009-08-26 株式会社ジェイテクト 電動パワーステアリング装置およびその製造方法
US20090266640A1 (en) * 2005-11-10 2009-10-29 Nsk Ltd. Electric power steering apparatus
DE102008001041A1 (de) * 2008-04-08 2009-10-15 Robert Bosch Gmbh Welleneinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011079982A2 *

Also Published As

Publication number Publication date
WO2011079982A2 (fr) 2011-07-07
WO2011079982A3 (fr) 2012-04-19
CN102668339A (zh) 2012-09-12
US20130015739A1 (en) 2013-01-17
DE102009055396A1 (de) 2011-07-07

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