EP4173115A1 - Schraubverbindung, elektrische maschine und kraftfahrzeug-antriebseinheit - Google Patents
Schraubverbindung, elektrische maschine und kraftfahrzeug-antriebseinheitInfo
- Publication number
- EP4173115A1 EP4173115A1 EP21734786.3A EP21734786A EP4173115A1 EP 4173115 A1 EP4173115 A1 EP 4173115A1 EP 21734786 A EP21734786 A EP 21734786A EP 4173115 A1 EP4173115 A1 EP 4173115A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw connection
- screw
- sleeve
- spacer
- motor vehicle
- 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- Withdrawn
Links
Classifications
-
- 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
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/002—Measures against loss of bolts, nuts or pins
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/08—Insulating casings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2410/00—Constructional features of vehicle sub-units
- B60Y2410/10—Housings
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
Definitions
- the invention relates to a screw connection between a stator of an electrical machine's rule and a housing.
- the invention also relates to an electrical machine with such a screw connection, as well as a drive unit for a motor vehicle with such an electrical machine.
- the patent application FR 2 115 648 A5 describes a structure for an electrically driven pump.
- the electric motor of the pump has a stator which is fastened to a housing by means of screws.
- the screws are surrounded by a tubular body to electrically isolate the stator from the housing.
- a screw connection between a stator of an electrical machine and a housing is proposed.
- the screw connection comprises a screw with a screw head, with a shank adjoining the screw head and with a thread adjoining the shank.
- the shaft is at least partially surrounded by an electrically insulating sleeve.
- a diameter of the thread is greater than an inner diameter of the sleeve. Due to the larger thread diameter in relation to the inner diameter of the sleeve, the thread forms a loss protection for the sleeve.
- the screw connection of the stator to the housing is thus significantly simplified, since the sleeves are already secured on the screws so that they cannot be lost.
- the sleeve preferably has an open cross section. As a result, the sleeve can only be attached to the shaft after the thread has been produced. In this way, it can be prevented in a simple manner that chips produced during thread production remain between the shaft and the sleeve.
- the screw with the finished thread can be heat-treated in order to improve the strength of the screw. If the sleeve is only attached to the shaft after the heat treatment, the sleeve does not have to be made of a high-temperature-resistant material.
- An electrically insulating spacer washer is preferably assigned to the screw head.
- the spacer washer has a through hole, the shaft being passed through the through hole. The spacer ensures electrical insulation between the screw head and the contact surface of the screw connection associated with the screw head.
- spacer and sleeve are separate components, wel che are preferably made of different materials.
- the sleeve can be made of polyamide or polyphenylene sulfide. These plastics are easy to manufacture and are characterized by a high temperature resistance, and are therefore well suited for use in the stator screw connection.
- the spacer disc is preferably made of ceramic or a high-pressure-resistant plastic. These materials have good electrical insulation and only have a minor impact on the setting behavior of the screw connection due to their compressive strength.
- the spacer has an axially aligned projection which is aligned in the direction of the screw head.
- the spacer can be attached to the screw head so that the spacer is secured against loss.
- a further sleeve can be provided which surrounds the screw head and the spacer washer at least in sections. Even with one In such a configuration, the spacer disk can be attached to the screw head in order to ensure that the spacer disk is secured against loss.
- an outer diameter of the sleeve surrounding the shaft is greater than an inner diameter of the through hole of the spacer disc.
- the screw connection described at the beginning can be part of an electrical machine with a housing.
- the electric machine comprises a rotatable stator and a rotatably mounted rotor, the stator being arranged within the housing.
- the stator is connected to the housing via the screw connection described at the beginning.
- the screw connection is preferably aligned axially parallel to an axis of rotation of the rotor.
- the electric machine can be part of a drive unit for a motor vehicle, the electric machine being set up to drive the vehicle.
- the electrical machine can be part of an axis with Elektroan drive.
- the electric machine can be part of a hybrid module which is arranged in the motor vehicle drive train between the internal combustion engine and the transmission, or between the transmission and the drive axle.
- the electrical machine can be part of a transmission in the motor vehicle drive train.
- FIGS. 1 a to 1d show various configurations of a motor vehicle drive train
- Fig. 2 is a schematic sectional view of a motor vehicle drive unit
- 3a shows a view of a screw
- 3b shows a cross section of a sleeve
- 4a to 4c each show a detailed view of various exemplary embodiments of a screw connection.
- the drive train has an internal combustion engine VM.
- the drive train has a transmission G to adapt the speed and torque output characteristics of the internal combustion engine VM to the driving resistances of the motor vehicle.
- the transmission G can be an automatic transmission, an automated transmission with a single starting clutch, a dual clutch transmission, a CVT transmission or a manual transmission, for example.
- the gear G is connected to a differential gear AG, which distributes the drive power to drive wheels DW.
- a hybrid module HY is arranged between the internal combustion engine VM and the transmission G.
- the hybrid module HY has an electrical cal machine EM, by means of which the motor vehicle can be driven purely electrically or hybridically together with the internal combustion engine VM.
- the hybrid module HY can have a separating clutch, not shown in FIG. 1a, by means of which a torque transmission between the internal combustion engine VM and the electrical machine EM can be switched.
- FIG. 1 b shows a further configuration of a motor vehicle drive train.
- a hybrid module HY2 is provided therein, which, in contrast to the drive train according to FIG. 1a, is arranged on the output side of the transmission G.
- the hybrid module HY2 also has an electrical machine EM, by means of which the motor vehicle can be driven purely electrically or in a hybrid manner together with the internal combustion engine VM.
- 1c shows a further configuration of a motor vehicle drive train.
- the electric machine EM is part of the transmission G.
- Such a transmission G is also referred to as a hybrid transmission.
- 1d shows a further configuration of a motor vehicle drive train which, in contrast to the drive trains according to FIGS. 1a to 1c, is a purely electric drive train without an internal combustion engine.
- An electric axle drive EA has an electric machine EM, the drive power of which is distributed to drive wheels DW of the motor vehicle via the Differentialge gear AG.
- Such a drive train could also have a transmission between the axle drive EA and the differential gear AG, for example a 2-speed transmission.
- Such an electric axle drive EA could also be combined with a second axle driven by an internal combustion engine.
- the hybrid modules HY, HY2, the hybrid transmission G and the axle drive EA form drive units for the motor vehicle.
- Fig. 2 shows a schematic sectional view of such a drive unit HY, HY2, G, EA.
- the electrical machine EM is arranged in a metallic housing GG and has a non-rotatable stator S and a rotor R.
- the rotor R is connected to a rotor shaft RW, which is mounted on the housing GG via a bearing WL. In this way, the rotor R can rotate together with the rotor shaft RW about an axis RA.
- the stator S has a stator lamination stack SB on which at least one stator winding SW is arranged.
- the laminated stator stack SB is fastened to the housing GG via a screw connection SV, for example using three screws SS.
- the laminated stator stack SB has through openings SB1 through which the screws SS are passed in the axial direction.
- threaded holes GG1 are arranged, which interact with a thread SS3 of the screws SS.
- a shaft SS2 of the screw SS is surrounded by an electrically insulating sleeve SH.
- the diameter of the thread SS3 is larger than an inner diameter of the sleeve SH, so that the sleeve SH is secured on the screw SS.
- the stator S is electrically isolated from the housing GG in order to reduce the transmission of interference currents originating from the stator S via the housing GG and via the bearing WL to the rotor shaft RW.
- electrically insulating spacers SD2 are arranged between the stator lamination packet SB and the housing GG. These spacers SD consist, for example, of ceramic or a high-pressure-resistant one Plastic. Electrically insulating spacers SD are arranged between a screw head SS1 of the screws SS and the stator lamination stack SD.
- FIG 3a shows a perspective view of the screw SS.
- the screw head SS1 the shaft SS2 and the thread SS3 of the screw SS can be seen.
- the diameter of the thread SS3 is larger than the diameter of the shaft SS3.
- Fig. 3b shows a cross section of the sleeve SH.
- the sleeve SH has an open cross-section and can thus be pushed onto the shaft SS2 even after the thread SS3 has been produced.
- Fig. 4a shows a detailed view of the screw connection SV according to a first exemplary embodiment, which differs from the screw connection shown in Fig. 2 un.
- the spacer disk SD has an axially aligned projection SDX which is aligned in the direction of the screw head SS1.
- the spacer washer SD is secured to the screw head SS1 via this projection SDX, so that the spacer washer SD cannot slip unhindered from the screw SS.
- FIG. 4b shows a detailed view of the screw connection SV according to a second exemplary embodiment, which differs from the screw connection shown in FIG. 2.
- a further sleeve SH2 is provided therein, which surrounds the screw head SS1 and the spacer disk SD at least in sections.
- the spacer washer SD is secured to the screw head SS1 via this further sleeve SH2, so that the spacer washer SD cannot slide unhindered from the screw SS.
- Fig. 4c shows a detailed view of the screw connection SV according to a third exemplary embodiment from which differs from the screw connection shown in Fig. 2 un.
- the sleeve SH does not extend to the screw head SS1.
- a through hole in the spacer SD is smaller than an outer diameter of the sleeve SH, so that the spacer SD cannot slip off the screw SS.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020207815.7A DE102020207815A1 (de) | 2020-06-24 | 2020-06-24 | Schraubverbindung, elektrische Maschine und Kraftfahrzeug-Antriebseinheit |
| PCT/EP2021/066327 WO2021259741A1 (de) | 2020-06-24 | 2021-06-17 | Schraubverbindung, elektrische maschine und kraftfahrzeug-antriebseinheit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4173115A1 true EP4173115A1 (de) | 2023-05-03 |
Family
ID=76624023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21734786.3A Withdrawn EP4173115A1 (de) | 2020-06-24 | 2021-06-17 | Schraubverbindung, elektrische maschine und kraftfahrzeug-antriebseinheit |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20230253840A1 (de) |
| EP (1) | EP4173115A1 (de) |
| CN (1) | CN115699515A (de) |
| DE (1) | DE102020207815A1 (de) |
| WO (1) | WO2021259741A1 (de) |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3447010A (en) * | 1966-06-08 | 1969-05-27 | Emerson Electric Co | Hermetic motor stator with insulated mounting bolts |
| US3693035A (en) * | 1970-09-15 | 1972-09-19 | Black & Decker Mfg Co | Double insulated field mounting for universal motor |
| FR2115648A5 (de) | 1970-11-27 | 1972-07-07 | Thomson Houston Hotchkis | |
| JPH11266555A (ja) * | 1998-03-16 | 1999-09-28 | Toshiba Corp | 回転電機の回転子 |
| DE19924502C2 (de) | 1999-05-28 | 2003-08-07 | Elringklinger Ag | Schraube mit Hülse |
| US20030071528A1 (en) * | 2001-10-12 | 2003-04-17 | Shields Steve J. | Vehicle AC generator through-bolt |
| WO2003084025A1 (en) * | 2002-04-01 | 2003-10-09 | Nissan Motor Co., Ltd. | Stator mounting for a double rotor electric motor |
| JP2004332845A (ja) * | 2003-05-08 | 2004-11-25 | Wakai & Co Ltd | スクリューねじ |
| AT10411U1 (de) * | 2007-05-31 | 2009-02-15 | Acc Austria Gmbh | Kältemittelverdichter |
| CN201146083Y (zh) * | 2007-12-14 | 2008-11-05 | 艾默生网络能源有限公司 | 低压绝缘子 |
| DE102012210886A1 (de) | 2012-06-26 | 2014-01-02 | Robert Bosch Gmbh | Gleichrichter, elektrische Maschine |
| CN203992866U (zh) * | 2014-07-14 | 2014-12-10 | 广东精工钢结构有限公司 | 一种新型栓钉枪绝缘体 |
| CN204755535U (zh) * | 2015-06-23 | 2015-11-11 | 深圳市好利时实业有限公司 | 一种通讯器材用绝缘螺钉 |
| CN109417318A (zh) * | 2016-07-06 | 2019-03-01 | 松下电器产业株式会社 | 磁性板的层叠体及其制造方法、使用该层叠体的电机 |
| JP6637927B2 (ja) * | 2017-06-13 | 2020-01-29 | 本田技研工業株式会社 | 回転電機のステータ |
| US11165291B2 (en) * | 2017-08-08 | 2021-11-02 | Kabushiki Kaisha Toshiba | Stator core support device and rotating electrical machine |
| DE102018004217A1 (de) * | 2018-05-25 | 2019-11-28 | Nexans | Energieversorgungsanschluss mit unverlierbarer Befestigung |
| CN208386258U (zh) * | 2018-08-06 | 2019-01-15 | 大唐甘肃发电有限公司碧口水力发电厂 | 定子穿心螺杆绝缘结构 |
| JP7502587B2 (ja) * | 2019-03-12 | 2024-06-19 | ダイキン工業株式会社 | 圧縮機 |
| CN210318073U (zh) * | 2019-05-11 | 2020-04-14 | 温州市洲泰五金制造有限公司 | 一种带垫片的螺钉 |
| JP7347197B2 (ja) * | 2019-12-19 | 2023-09-20 | トヨタ自動車株式会社 | 回転電機コアの製造方法および製造装置 |
-
2020
- 2020-06-24 DE DE102020207815.7A patent/DE102020207815A1/de active Pending
-
2021
- 2021-06-17 CN CN202180040391.8A patent/CN115699515A/zh active Pending
- 2021-06-17 EP EP21734786.3A patent/EP4173115A1/de not_active Withdrawn
- 2021-06-17 US US18/011,967 patent/US20230253840A1/en not_active Abandoned
- 2021-06-17 WO PCT/EP2021/066327 patent/WO2021259741A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021259741A1 (de) | 2021-12-30 |
| US20230253840A1 (en) | 2023-08-10 |
| DE102020207815A1 (de) | 2021-12-30 |
| CN115699515A (zh) | 2023-02-03 |
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