EP2576244A1 - Elektrischer radantrieb - Google Patents
Elektrischer radantriebInfo
- Publication number
- EP2576244A1 EP2576244A1 EP11730229.9A EP11730229A EP2576244A1 EP 2576244 A1 EP2576244 A1 EP 2576244A1 EP 11730229 A EP11730229 A EP 11730229A EP 2576244 A1 EP2576244 A1 EP 2576244A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wheel drive
- spring
- wheel
- inner part
- designed
- 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.)
- Ceased
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
- F16C19/185—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0005—Hubs with ball bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0047—Hubs characterised by functional integration of other elements
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/002—Conductive elements, e.g. to prevent static electricity
-
- 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
- H02K11/40—Structural association with grounding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2380/00—Bearings
- B60B2380/10—Type
- B60B2380/12—Ball bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2380/00—Bearings
- B60B2380/70—Arrangements
- B60B2380/73—Double track
Definitions
- the invention relates to an electric wheel drive of a road vehicle, in particular a motor vehicle or a two-wheeled vehicle with electric drive or electric auxiliary drive.
- An electric wheel drive of a motor vehicle can be designed either as a direct drive, such as known from DE 10 2006 040 223 A1, or as an electric drive with a transmission, as known in principle for example from EP 1 382 476 B1.
- a direct drive such as known from DE 10 2006 040 223 A1
- an electric drive with a transmission as known in principle for example from EP 1 382 476 B1.
- regulations regarding electromagnetic compatibility must be met.
- the electromagnetic radiation emitted during operation of the motor vehicle must not exceed certain limit values.
- the invention has for its object to minimize the emission of electromagnetic waves in an electric wheel drive of a road vehicle by simple means.
- the electric wheel drive comprises a wheel bearing, the two parts rotatable relative to each other, namely an inner part and an outer part, wherein the outer part of a potential equalization element is attached, which contacts the inner part at the end face.
- An electrically conductive connection between a stator housing and a rotor shaft of an electric motor is known in principle from DE 101 62 818 A1.
- Various variants of the electrically conductive devices (FIGS. 1-7; 9-12) disclosed herein can in principle be used as an equipotential bonding element in the wheel bearing of the wheel drive according to the invention.
- the equipotential bonding element of the wheel bearing is designed as a cap.
- the equipotential bonding element can be designed, for example, as a metal bracket.
- an electrically conductive contact between the outer part and the inner part of the wheel bearing is preferably made via an elastic contact element of the equipotential bonding element.
- the depending on the embodiment with the potential equalization element identical or a part of the potential equalization element forming contact element may have a total of resilient properties or comprise a spring which is formed for example as a helical spring or a spring tongue.
- the contact element comprises a ball contacting the inner part of the wheel bearing in the region of its axis of rotation. This ball can in turn be roller-mounted by a plurality of smaller balls, as is the case for example in a known from DE 41 03 465 A1 locking device.
- the spring of the contact element directly contacts the inner part of the wheel bearing in the region of its axis of rotation.
- Steel spring or steel ball can also be a carbon pin or a coal element other geometry to equip the potential between the inner part and the outer part of the wheel bearing can be used.
- an electrically conductive connection with a resistance of the order of 10 3 to 10 6 ohms is sufficient to ensure the equipotential bonding.
- Such a resistance can also be achieved with a conductive grease.
- the wheel bearing of the device according to the invention is preferably designed as a double-row roller bearing, in particular a double-row angular contact ball bearing.
- This type of bearing is known for example from DE 43 39 847 C2.
- the invention is applicable to passenger cars or trucks as well as, for example, scooters or bicycles with an auxiliary engine.
- FIG. 1 is a fragmentary view of a first embodiment of a wheel bearing of an electric wheel drive of a motor vehicle
- FIG. 2 shows a representation analogous to FIG. 1 of a second exemplary embodiment of a wheel bearing of an electric wheel drive
- Fig. 3 shows a third embodiment of a wheel bearing of an electric wheel drive
- FIG. 4 shows a detail from FIG. 3
- FIG. 5 is a fragmentary plan view of another embodiment of a wheel bearing of an electric wheel drive, Fig. 5 shows the arrangement of FIG. 5 in a sectional view.
- a wheel bearing 2 is visible in sections. This comprises two relatively rotatable parts 3,4, which are generally referred to as inner part 3 and outer part 4.
- the axis of rotation of the wheel bearing 2 is denoted by R.
- a roller bearing 5 is provided, which will be explained in more detail below.
- the inner part 3 has a hub 6, on which two inner rings 7, 8 are held, wherein one of the inner rings 7, 8 can be formed integrally with the hub 6.
- On the inner rings 7,8 roll two rows of rolling elements 9, namely balls, from.
- the associated raceways of the rolling elements 9 on the outer part 4 are provided by an outer sleeve 10 which merges integrally into a flange 1 1 and in a sleeve extension 12 in the direction of an end face 13 of the hub 6.
- the flange 1 1 has mounting holes 14, depending serve according to the overall construction of the connection of the wheel bearing 2 to a suspension element or the attachment of a wheel.
- a Potentialaus Diselennent 15 is attached or otherwise secured, which is designed as a cap that covers the end face 13 of the hub 6.
- this has a contact element 16 which is elastically yielding and thus ensures a reliable potential equalization between the parts 3,4 of the wheel bearing 2 and thus various components of the electric wheel drive 1 overall ,
- the contact element 16 comprises a spring 17 formed as a helical spring and a ball 18, the ball 18 being pressed by the spring 17 into a blind hole 19 concentric with the axis of rotation R in the end face 13 of the hub 6.
- the spring 17 is also formed as a helical spring.
- a ball as part of the contact element 16 is not provided in this case; Rather, the spring 17 contacts the hub 6 directly.
- the embodiment of Figures 3 and 4 is comparable to the embodiment of Figure 2 insofar as the contact element 16 does not comprise a ball.
- the spring 17 is formed in this case as a spring tongue.
- Figures 5 and 6 show a possible design of the potential equalization element 15:
- the potential equalization element 15 is formed as a one-piece sheet metal part, which can be produced efficiently by deep drawing.
- a pot portion 21 connects at the front, in which the contact element 16 is guided, which is similar to the embodiment of Figure 1 composed of a spring 17 and a ball 18.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010022320A DE102010022320A1 (de) | 2010-06-01 | 2010-06-01 | Elektrischer Radantrieb |
PCT/EP2011/057846 WO2011151161A1 (de) | 2010-06-01 | 2011-05-16 | Elektrischer radantrieb |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2576244A1 true EP2576244A1 (de) | 2013-04-10 |
Family
ID=44509197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11730229.9A Ceased EP2576244A1 (de) | 2010-06-01 | 2011-05-16 | Elektrischer radantrieb |
Country Status (5)
Country | Link |
---|---|
US (1) | US20130071057A1 (de) |
EP (1) | EP2576244A1 (de) |
CN (1) | CN102958709A (de) |
DE (1) | DE102010022320A1 (de) |
WO (1) | WO2011151161A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012204795A1 (de) | 2012-03-26 | 2013-09-26 | Schaeffler Technologies AG & Co. KG | Radnabenmotor mit Potenzialausgleich |
DE102013217980B4 (de) * | 2013-09-09 | 2015-04-02 | Schaeffler Technologies Gmbh & Co. Kg | Wälzlager |
CN104037985B (zh) * | 2014-06-04 | 2017-01-25 | 湖南海捷主轴科技有限公司 | 电机转子防静电放电装置及装配方法 |
CN104553613A (zh) * | 2015-01-30 | 2015-04-29 | 张琦 | 一种电动车用轮轴装置 |
CN109314443B (zh) | 2016-06-07 | 2020-08-11 | 特斯拉公司 | 用于加热电池的电马达废热模式 |
US10967702B2 (en) | 2017-09-07 | 2021-04-06 | Tesla, Inc. | Optimal source electric vehicle heat pump with extreme temperature heating capability and efficient thermal preconditioning |
JP2019192491A (ja) * | 2018-04-25 | 2019-10-31 | 三菱自動車工業株式会社 | 車両の軸アース装置 |
US11932078B2 (en) | 2021-03-31 | 2024-03-19 | Tesla, Inc. | Electric vehicle heat pump using enhanced valve unit |
DE102022105768A1 (de) | 2022-03-11 | 2023-09-14 | Schaeffler Technologies AG & Co. KG | Elektrische Axialflussmaschine, elektrisches Antriebssystem und Getriebemotoreinheit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009243695A (ja) * | 2009-07-31 | 2009-10-22 | Ntn Corp | 通電軸受 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4103465C2 (de) * | 1991-02-06 | 1996-09-05 | Schaeffler Waelzlager Kg | Arretiervorrichtung |
US5661356A (en) * | 1993-10-22 | 1997-08-26 | Fisher; Rodney R. | Motor shaft discharge device |
DE4339847C2 (de) | 1993-11-23 | 2000-09-14 | Kugelfischer G Schaefer & Co | Lagereinheit |
JPH0893755A (ja) * | 1994-09-22 | 1996-04-09 | Ntn Corp | 自動車用ホイールの軸受ユニット |
IT1293461B1 (it) * | 1997-07-17 | 1999-03-01 | Skf Ind Spa | Cuscinetto di rotolamento con dispositivo di tenuta e di scarico di correnti elettrostatiche. |
DE10162818A1 (de) | 2001-12-14 | 2003-06-26 | M & W Zander Facility Eng Gmbh | Elektromotor |
FR2842147A1 (fr) | 2002-07-15 | 2004-01-16 | Conception & Dev Michelin Sa | Chaine de traction comportant un mecanisme de changement de rapport integre dans une roue |
CN1759322A (zh) * | 2003-03-10 | 2006-04-12 | 光洋精工株式会社 | 车轴支承装置 |
CN2749721Y (zh) * | 2004-07-13 | 2006-01-04 | 杨恒道 | 离合式可控汽车节油半轴 |
US7332843B2 (en) * | 2004-10-14 | 2008-02-19 | Asmo Co., Ltd. | Motor |
JP2007022386A (ja) * | 2005-07-19 | 2007-02-01 | Ntn Corp | 電動式車輪駆動装置 |
JP4798659B2 (ja) * | 2006-06-08 | 2011-10-19 | 株式会社不二越 | 電動モータ付き車輪駆動装置 |
JP2007331555A (ja) * | 2006-06-14 | 2007-12-27 | Ntn Corp | 駆動車輪用軸受ユニット |
DE102006040223A1 (de) | 2006-08-28 | 2008-03-20 | Franc Just | Elektrische Maschine mit eisenlosen Feldspulen |
CN201264707Y (zh) * | 2008-10-07 | 2009-07-01 | 陈友德 | 一种电力助动车的驱动装置 |
-
2010
- 2010-06-01 DE DE102010022320A patent/DE102010022320A1/de not_active Withdrawn
-
2011
- 2011-05-16 WO PCT/EP2011/057846 patent/WO2011151161A1/de active Application Filing
- 2011-05-16 CN CN2011800272462A patent/CN102958709A/zh active Pending
- 2011-05-16 EP EP11730229.9A patent/EP2576244A1/de not_active Ceased
- 2011-05-16 US US13/698,180 patent/US20130071057A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009243695A (ja) * | 2009-07-31 | 2009-10-22 | Ntn Corp | 通電軸受 |
Also Published As
Publication number | Publication date |
---|---|
US20130071057A1 (en) | 2013-03-21 |
WO2011151161A1 (de) | 2011-12-08 |
DE102010022320A1 (de) | 2011-12-01 |
CN102958709A (zh) | 2013-03-06 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20130102 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG |
|
17Q | First examination report despatched |
Effective date: 20140324 |
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REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
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18R | Application refused |
Effective date: 20141227 |