EP4434146A1 - Verfahren zur montage eines entkopplungselements in einer durchgangsbohrung eines stators einer elektromaschine, stator für eine elektromaschine sowie elektromaschine umfassend einen solchen stator - Google Patents
Verfahren zur montage eines entkopplungselements in einer durchgangsbohrung eines stators einer elektromaschine, stator für eine elektromaschine sowie elektromaschine umfassend einen solchen statorInfo
- Publication number
- EP4434146A1 EP4434146A1 EP22801985.7A EP22801985A EP4434146A1 EP 4434146 A1 EP4434146 A1 EP 4434146A1 EP 22801985 A EP22801985 A EP 22801985A EP 4434146 A1 EP4434146 A1 EP 4434146A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- hole
- sleeve
- decoupling element
- electric machine
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- 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
-
- 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
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/028—Fastening stator or rotor bodies to casings, supports, shafts or hubs
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
Definitions
- the invention relates to a method for installing a decoupling element in a through hole in a stator of an electric machine, the decoupling element comprising a sleeve and an elastic covering made of a damping material which is attached to the sleeve and surrounds the sleeve and via which the stator can be separated from a housing of the electric machine in the installed position is vibration-decoupled, has.
- the stator itself is provided with several through holes, in each of which a decoupling element is inserted.
- the decoupling element has an inner cylindrical sleeve which, when the stator is installed, is supported axially on the housing of the electric machine on the one hand and on which a head of a fastening screw is seated on the other hand, which passes through the sleeve and is screwed into a corresponding internally threaded bore on the housing.
- This cylindrical inner sleeve is surrounded by an elastic covering made of a damping material, which in turn is accommodated in a cylindrical outer sleeve.
- This 3-piece decoupling element is pressed with the outer sleeve into the stator-side bore, after which both ends of the outer sleeve are flanged, resulting in a radial collar that is used to secure the stator axially.
- the stator itself is connected to the housing via the screw connection, but this respective mechanical attachment is vibrationally decoupled via the elastic casing made of the damping material, which means that high-frequency vibrations of the stator are not transmitted to the housing or only to a significantly reduced extent or with a reduced amplitude be radiated.
- the assembly or formation of such a decoupling element is very complex.
- the outer sleeve and the inner sleeve must be cut into a suitable tool stuff are inserted and positioned relative to each other, after which the elastic damping material is introduced between the two sleeves and vulcanized, for example.
- the corresponding three-part decoupling element is formed, which, however, is subsequently to be reworked in a laborious manner.
- the outer diameter of the outer sleeve must correspond as exactly as possible to the inner diameter of the stator bore, so that there is as little play as possible. This play must ultimately be reduced to zero by the subsequent flanging, which also serves to secure the axial axis. Both the production and the assembly is therefore expensive.
- the invention is based on the problem of specifying a method for assembling such a decoupling element that is improved in comparison thereto.
- the invention provides that the decoupling element, the elastic covering of which has a larger outer diameter than the inner diameter of the through-hole, is pressed into the through-hole through an insertion opening that widens like a funnel and, in the assembly position, is connected directly to the Inner wall of the through hole rests.
- a two-part decoupling element comprising the cylindrical inner sleeve as well as the likewise cylindrical casing made of the elastic damping material which is fastened to and surrounds it.
- the outer diameter of the casing is larger than the inner diameter of the through hole, which means that there is a corresponding overlap or oversize.
- the decoupling element which as mentioned has a larger outside diameter than the inside diameter of the bore, into the through bore, the decoupling element is pressed into the through-hole through an insertion opening that widens outwards in a funnel-like manner or narrows in a funnel-like manner towards the through-hole and is pushed into the assembly position in which, after the assembly work has been completed, the elastic covering rests against the inner wall of the hole with corresponding radial tension.
- the fastening screw is passed through the inner sleeve and screwed into the housing-side internally threaded bore, the inner sleeve preferably projecting axially out of the stator being pressed into the housing-side bore at the same time.
- the decoupling element has a simpler design, since it consists only of the inner sleeve and the cover attached to it and vulcanized, for example.
- the assembly is also simplified, since the decoupling element only has to be pressed into the through hole through the funnel-like insertion opening, no flanging processes or the like are necessary.
- the respective through holes can be provided at different positions or different elements of the stator. It is conceivable to form the through-holes directly in a laminated stator core, which consists of a large number of individual, thin electrical laminations. Alternatively, such a laminated stator core can also be arranged in a stator carrier, with the through-holes then being formed on the stator carrier.
- a mounting sleeve which has the insertion opening that widens like a funnel, is inserted into the through-hole, after which the decoupling element is pressed through the insertion opening into the mounting sleeve and thus into the through-hole is, after which the mounting sleeve is pulled out of the through hole and the elastic sheath rests against the inner wall of the through hole.
- a laminated stator core consists of a large number of thin electrical laminations stacked on top of one another. For example, about 80 such electrical sheets are stacked on top of each other, each with a thickness of about 0.3 mm.
- each electrical sheet with a mostly round perforation is punched, the perforations then complementing each other to form a through hole, although small, there can be sharp edges or the like on the inner wall of the hole, as well as at the entrance to the hole. If the elastic cover were to be pressed in directly, these sharp edges would cut into the cover and, in the worst case, destroy it.
- This is countered by first inserting a thin mounting sleeve, which has a wall thickness of 0.3 1.0 mm, for example, into the through-hole.
- the mounting sleeve has a section positioned outside of the through hole with the funnel-like insertion opening.
- the decoupling element is now first pressed into the mounting sleeve via this insertion opening until the end position is reached.
- the mounting sleeve is then pulled out of the through hole again, while of course the decoupling element is supported so that it is not pulled out with it.
- the elastic covering is then radially prestressed against the inner wall of the bore.
- the assembly sleeve can have a cylindrical sleeve body and a stop collar that is connected to it and has an enlarged outer diameter, on which the insertion opening that widens like a funnel is provided, with the sleeve body being inserted with little play in the through hole until the stop collar is seated axially on the stator lamination stack, after which the decoupling element is pressed.
- This stop collar allows the mounting sleeve to be reversibly brought into a defined mounting position.
- this stop collar is also used at the same time to couple the mounting sleeve to a corresponding tool, via which the mounting sleeve can be pulled out of the through hole at least after the decoupling element has been set.
- the stop collar should therefore be designed to be correspondingly stable and be equipped with a corresponding connection interface to the pulling tool.
- the stator can also have a stator carrier on which the laminated core of the stator is arranged.
- the or the through-holes are provided on the stator support, on which the respective insertion opening, which widens like a funnel, is provided.
- the funnel-like insertion opening is tion directly on the stator itself as an extension of the actual through-hole accommodating the elastic casing. In this case, it is not necessary to use an assembly sleeve, since the stator carrier itself is already equipped with the corresponding insertion opening.
- a particularly expedient development of the invention provides that a lubricating fluid is used during pressing. Irrespective of whether an insertion sleeve is used, when the through-holes are formed in the stator core itself, or with a stator support, the pressing-in is carried out using an appropriate sliding fluid, which reduces the friction between the elastic damping material and the cylindrical inner wall against which it is pressed during the Pressing slides along, reduced. It may be that the elastic damping material, for example rubber, has a correspondingly high coefficient of friction, so that it would be difficult to slide along the corresponding cylindrical wall, in particular due to the given oversize. However, if a lubricating fluid is used, the friction between the damping material and the wall can be greatly reduced, which makes pressing in much easier.
- the lubricating fluid can either be applied to the outside of the casing, or to the corresponding wall, ie the mounting sleeve or the wall of the bore itself, or to both.
- the use of either an oil or a corresponding pasty fat or the like is conceivable.
- the invention also relates to a stator for an electric machine, comprising a plurality of through-bores, in each of which a decoupling element is inserted according to the method described above.
- the invention generally relates to a stator for an electric machine, comprising a plurality of through-holes into which a fastening screw connecting the stator to a housing of the electric machine is to be inserted, with a decoupling element being accommodated in each through-hole, comprising a sleeve, which in the assembled position on the one hand is supported axially on the housing and on the other hand a head of the fastening screw is supported, as well as a sheath surrounding the sleeve made of an elastic material, via which the stator is vibration-decoupled from the housing in the assembled position, this stator being characterized in that the elastic material bears directly against the inner wall of the through-hole.
- each through-bore can be formed either in a laminated stator core, penetrating its laminations.
- each through hole can also be formed on a stator support on which the insertion opening is formed.
- the damping material itself is preferably an elastomer, in particular with a Shore hardness in the range from 60 Sh(a) to 100 Sh(a).
- the spring or damping effect of the elastic material is ultimately dependent on the Shore hardness of the material as well as the degree of compression, which is why the oversize in diameter must be designed in such a way that the compression of the elastic material and thus its radial prestress is on the one hand in a desired target range and on the other hand but is so high that a secure axial fixation takes place over it.
- the invention also relates to an electric machine, comprising a stator of the type described above, which is fastened to a housing of the electric machine via fastening screws penetrating the sleeve of the respective decoupling element.
- FIG. 1 shows a partial view of an electrical machine according to the invention with a stator according to the invention in a sectional view, according to a first embodiment as a schematic representation
- FIG. 1 shows a partial view of an electric machine 1 according to the invention, comprising a housing 2 to which a stator 3 is attached.
- the stator 3 consists of a laminated core 4 of the stator, which consists of a multiplicity of individual electrical laminations 5 which are stacked on top of one another and which are only shown in principle here.
- a plurality of through-holes 6 are formed in the laminated core, which are offset around the stator circumference, only one such through-hole 6 being shown in FIG. 1 .
- the through hole 6 has an inner wall 7 .
- the decoupling element 8 has an internal cylindrical sleeve 11 which is surrounded on the outside by an elastic covering 12 on a damping material, preferably an elastomer with a Shore hardness of between 60 and 100 Sh(a).
- the damping material is preferably vulcanized.
- the casing 12 extends axially over approximately 2/3 of the length of the inner sleeve 11 , which means that the sleeve 11 protrudes axially beyond the casing 12 . In the assembly position, as shown in Fig.
- the sleeve 11 engages with its end 13 in a radial extension 14 of the internally threaded bore 10, the sleeve 11 being pressed into this extension 13 when the fastening screw 9 is screwed in after the screw head 15 rests axially against the sleeve 11 and presses it in axially.
- the elastic covering 12 in turn rests against the inner wall 7 of the through hole 6 under radial prestress, the radial prestress being produced by a corresponding diametral overlap or an oversize of the outside diameter of the covering 12 relative to the smaller inside diameter of the through hole 6 .
- This radial compression in the course of which the elastic damping material is radially compressed, also simultaneously secures it axially.
- the through hole 6 is formed directly in the stator sheet 4, which consists of the plurality of individual electrical sheets 5, of which, for example, up to 80 or more can be layered and have a thickness of about 0.3 mm, on the one hand Entrance of the through hole, but on the other hand possibly also within the through hole 6 even if small, but given sharp burrs that cut into the elastic damping material when pressed and, in the worst case, can destroy it.
- Fig. 2 shows the situation in which the decoupling element 8 is not yet used.
- the decoupling element 8 is a prefabricated element with the sleeve 11 and the elastic covering 12 attached thereto, for example vulcanized on at the same time also serves to hold a corresponding pulling tool for the subsequent extraction of the assembly sleeve 16 .
- the sleeve body 17 is pushed into the through hole 6, the stop collar 18 is seated axially on the laminated core 4.
- the sleeve section 16 is as thin as possible, it preferably has a thickness of 0.3 1.0 mm, so that the damping material is not overly compressed when it is pressed in.
- the outer diameter of the sleeve section 16 is dimensioned such that the sleeve section 16 has as little play in the through-bore 6 as possible.
- the mounting sleeve 16 or the stop collar has an insertion opening 19 that widens outwards in a funnel shape, which means that the inner diameter of the stop collar 18 widens towards its free end.
- a lubricating fluid is expediently used, with which the outside of the casing 12 is coated, for example, which lubricating fluid reduces the friction between the outside of the casing 12 and the inside of the mounting sleeve 16, so that both friction partners can slide easily along one another until the decoupling element 8 is in the final position.
- FIG. 3 shows the situation in which the decoupling element 8 is pressed into the through hole 6 or into the mounting sleeve 16 .
- the pressing process is shown in Figures 2 and 3 by the arrow P1.
- the decoupling element 8 is pushed until the casing 12 is completely accommodated in the through hole 6 or the sleeve section 17 .
- the end 13 of the inner sleeve 11 protrudes axially and protrudes from the through hole 6 .
- the mounting sleeve 16 is pulled out of the through bore 6, as indicated by the arrow P2, for which purpose a corresponding pulling tool which engages with the stop collar 18 is used.
- the decoupling element 8 is held down and fixed so that it is not pulled out again when the mounting sleeve 16 is pulled. Due to the lubricating fluid, it is also pulled out with relatively little friction.
- FIG. 5 shows the finished end position of the assembled decoupling element 8 , in which the elastic covering 12 bears directly against the inner wall 7 of the through hole 6 .
- the free end 13 of the sleeve 11 projects axially out of the through hole 6 so that it can be pressed into the radial extension 14 of the internally threaded hole 10 by means of the fastening screw 9 as part of the stator attachment.
- 6 shows a further embodiment of a stator 3 according to the invention, which can also be part of an electric machine 1 according to the invention instead of the stator 3 shown in the preceding figures.
- the stator 3 has a stator support 21 on which the through-holes 6 are formed.
- the laminated core 4 consisting of a large number of individual electrical laminations 5 , is arranged on the stator carrier 21 .
- the through-holes 6 are formed here on the stator support 21 but not in the laminated core 4 itself, it is possible to form a corresponding insertion geometry directly on the stator support 21 itself, as FIG. 6 shows.
- the through bore 6 itself has an insertion opening 19 that widens like a funnel, through which the decoupling element 8, again consisting of the sleeve 11 and the elastic covering 12, can be inserted, during which pressing-in movement the elastic covering 12 is automatically reduced in diameter and compressed until it is pushed to the end position shown in fig.
- This pressing-in takes place in turn using a corresponding sliding fluid, for example an oil or a grease.
- the free end 13 of the sleeve 11 projects out of the through hole 6 or out of the stator support 21, so that it can be pressed into the radial widening 14 of the internally threaded hole 10 in the same way as already described.
- the fastening screw 9 is positioned in the same way so that it can be screwed into the internally threaded bore 10 and at the same time the sleeve end 13 is pressed in, while the screw head 15 is seated axially on the other end of the sleeve 11 .
- the through bores 6, which can also be referred to as eyes, are formed either on correspondingly shaped sections of the stator support 21, or by means of sections correspondingly welded to the stator support. Reference character list
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021130130.0A DE102021130130A1 (de) | 2021-11-18 | 2021-11-18 | Verfahren zur Montage eines Entkopplungselements in einer Durchgangsbohrung eines Stators einer Elektromaschine, Stator für eine Elektromaschine sowie Elektromaschine umfassend einen solchen Stator |
| PCT/DE2022/100809 WO2023088514A1 (de) | 2021-11-18 | 2022-11-03 | Verfahren zur montage eines entkopplungselements in einer durchgangsbohrung eines stators einer elektromaschine, stator für eine elektromaschine sowie elektromaschine umfassend einen solchen stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4434146A1 true EP4434146A1 (de) | 2024-09-25 |
Family
ID=84332250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22801985.7A Pending EP4434146A1 (de) | 2021-11-18 | 2022-11-03 | Verfahren zur montage eines entkopplungselements in einer durchgangsbohrung eines stators einer elektromaschine, stator für eine elektromaschine sowie elektromaschine umfassend einen solchen stator |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12676517B2 (de) |
| EP (1) | EP4434146A1 (de) |
| KR (1) | KR102941161B1 (de) |
| CN (1) | CN118251826A (de) |
| DE (1) | DE102021130130A1 (de) |
| WO (1) | WO2023088514A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023209997A1 (de) * | 2023-10-12 | 2025-04-17 | Zf Friedrichshafen Ag | Vorrichtung zum Herstellen einer Statoreinheit und Fügeeinheit für die Vorrichtung |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1111479A (en) | 1976-12-03 | 1981-10-27 | James R. Postema | Elastomeric submersible motor seals |
| DE3539298A1 (de) | 1985-11-06 | 1987-07-09 | Bosch Gmbh Robert | Vorrichtung zur lagerung des staenders eines drehstromgenerators |
| DE19813984C5 (de) | 1998-03-28 | 2010-02-11 | Robert Bosch Gmbh | Entkopplungsvorrichtung für einen Elektromotor |
| JP2008199845A (ja) * | 2007-02-15 | 2008-08-28 | Toyota Motor Corp | ステータの取り付け構造 |
| DE102009028745A1 (de) | 2009-08-20 | 2011-02-24 | Robert Bosch Gmbh | Entkopplung eines Antriebsmotors |
| FR2983262B1 (fr) | 2011-11-30 | 2016-09-02 | Valeo Systemes Thermiques | Support-moteur a manchon de refroidissement amorti et groupe moto-ventilateur integrant un tel support-moteur |
| JP5657085B1 (ja) | 2013-11-08 | 2015-01-21 | 三菱電機株式会社 | 回転電機および回転電機用ステータの製造方法 |
| JP6699475B2 (ja) | 2016-09-14 | 2020-05-27 | 株式会社デンソー | 車載電動機器、および車載電気機器の製造方法 |
| 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 |
| JP6670863B2 (ja) | 2018-01-25 | 2020-03-25 | 本田技研工業株式会社 | 回転電機 |
| DE102018114790A1 (de) | 2018-06-20 | 2019-12-24 | Schaeffler Technologies AG & Co. KG | Elektrische Antriebseinrichtung, Antriebseinheit und Antriebsanordnung |
| JP7197335B2 (ja) | 2018-11-14 | 2022-12-27 | トヨタ自動車株式会社 | 車両用電動機 |
| DE102019209672A1 (de) | 2019-07-02 | 2021-01-07 | Zf Friedrichshafen Ag | Rohrleitung, Antriebsstrang-Einheit mit einer solchen Rohrleitung, sowie Montageverfahren |
-
2021
- 2021-11-18 DE DE102021130130.0A patent/DE102021130130A1/de active Pending
-
2022
- 2022-11-03 WO PCT/DE2022/100809 patent/WO2023088514A1/de not_active Ceased
- 2022-11-03 US US18/710,708 patent/US12676517B2/en active Active
- 2022-11-03 EP EP22801985.7A patent/EP4434146A1/de active Pending
- 2022-11-03 CN CN202280075946.7A patent/CN118251826A/zh active Pending
- 2022-11-03 KR KR1020247011894A patent/KR102941161B1/ko active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240055100A (ko) | 2024-04-26 |
| US20250023402A1 (en) | 2025-01-16 |
| US12676517B2 (en) | 2026-07-07 |
| KR102941161B1 (ko) | 2026-03-18 |
| CN118251826A (zh) | 2024-06-25 |
| DE102021130130A1 (de) | 2023-05-25 |
| WO2023088514A1 (de) | 2023-05-25 |
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