EP2411658A1 - Electrical machine having integrated dampening for a transmission component - Google Patents
Electrical machine having integrated dampening for a transmission componentInfo
- Publication number
- EP2411658A1 EP2411658A1 EP10709524A EP10709524A EP2411658A1 EP 2411658 A1 EP2411658 A1 EP 2411658A1 EP 10709524 A EP10709524 A EP 10709524A EP 10709524 A EP10709524 A EP 10709524A EP 2411658 A1 EP2411658 A1 EP 2411658A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- webs
- electrical machine
- machine according
- housing
- torque
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000007858 starting material Substances 0.000 claims abstract description 28
- 230000003313 weakening effect Effects 0.000 claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 239000004033 plastic Substances 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 description 16
- 238000013016 damping Methods 0.000 description 15
- 239000002184 metal Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N15/062—Starter drives
- F02N15/063—Starter drives with resilient shock absorbers
Definitions
- FR2 639.701 refers to a reduction gear, which is a planetary gear.
- the ring gear of the planetary gear is supported by means of elastic elements in a housing.
- the planetary gear comprises at least two planetary gears which mesh with an external toothing of a sun gear and the internal toothing of the ring gear supported via the elastic elements.
- the starter according to US 2003/0177852 A1 also comprises a planetary gear.
- DE 43 02854 C1 relates to a starting device for internal combustion engines.
- a starting device for internal combustion engines which has a starter motor and a one-way clutch in the drive train of the direction of rotation.
- a spring accumulator is provided in the drive train.
- the spring accumulator has a preload torque of 15% to 50% of the short-circuit torque of the Anxmotors.
- the ratio of the torsional stiffnesses of the linear spring accumulator to the torsional stiffness of the drive train without spring accumulator and based on the short-circuit torque forms a factor F> 4.
- the spring accumulator is disposed between a ring gear of a planetary gear. arranged tengetriebes and a fixed part of the housing of the starter.
- the spring accumulator consists of several distributed on the circumference of the ring gear arranged spring elements, which are supported on the fixed housing part.
- the spring elements press the ring gear with at least one projection formed thereon to form a bias against the drive direction of the starter against at least one fixed housing fixed stop.
- the projections on the ring gear are directed radially outward and arranged the spring elements on the outer circumference of the ring gear.
- the spring elements are, for example, helical compression springs or else curved leaf springs.
- the starters which are used in internal combustion engines used today, include an internal planetary gear for reasons of available space. Together with the pinion of the starter and the vehicle sprocket can set an optimal gear ratio for starting an internal combustion engine.
- On the planetary gear strong torque fluctuations act. At each compression, in case the freewheel closes, a shock load in the planetary gear becomes effective. Otherwise, the torque acts by turning the internal combustion engine in a continuous manner on the ring gear.
- Due to shape and position tolerance of the drive train and the electric motor of the starter, the planetary gear, in particular the ring gear heavily loaded and is exposed to high wear. In order to protect particularly loaded ring gears and to extend their service life, they are not made of plastic, as is common in the AII common practice, but of sintered metal.
- damping is realized by means of resilient additional elements made of rubber, as disclosed above by the example of FR 2 639, 701, US 2003/0177852 A1 and DE 43 02854 C1.
- the solution proposed according to the invention makes it possible to dispense with the use of hollow metal hollow wheels with additional rubber spring elements on electrical machines, in particular starters for internal combustion engines, as known from the prior art.
- a ring gear made of plastic for use in a planetary gear can be used, in which the damping is formed directly at the interface to a drive bearing for the realization of a torque support.
- the damping can be adjusted by simple modification to be made.
- Inexpensive to manufacture in particular made of plastic ring gears in planetary gearboxes, in particular planetary gears can be used in an advantageous manner to starters or other electrical machines.
- the degree of damping which can be brought about in the form of nose-shaped projections by the torque support acting in the circumferential direction on a cover plate, is influenced by its shape and can be advantageously adapted to the torque to be supported.
- the solution proposed according to the invention makes use of metal which has hitherto been produced by way of the sintering process
- the proposed solution according to the invention makes the use of additional damping elements made of rubber-elastic material or rubber superfluous.
- the torque support with respect to the ring gear remains integrated in it, so that no structural changes, in particular to a starter for internal combustion engines or other electric machines, on which epicyclic gears are used, are provided.
- the damping is achieved by a shaping and geometric design or a targeted weakening of the torque support of the ring gear in the drive bearing taking advantage of the Relaxationsver- like plastic. It is initiated a targeted tangential movement.
- slits be it symmetrical Einzelschiitzungen, symmetrical Doppelschlitzonne or asymmetric Doppelschlitzonne or deliberate weakenings in the material due to the geometry of the individual remaining webs or between them resulting free spaces become.
- the proposed solution according to the invention provides that the torque support due to the slits act as resilient elements in which a damping capacity can be specified by the geometry and number of slits. Due to the tangential resilient elements formed torque supports torque peaks are reduced, so that the mechanical stress acting on the now made of plastic ring gear, can be significantly reduced.
- the torque support for a transmission component of a planetary gear on a housing is advantageously provided as a symmetrical or asymmetrical torque support with material weakenings that absorb load peaks.
- a plurality of torque supports distributed in the circumferential direction are executed on a cover plate and have webs. The webs are separated. The webs are formed so that these support surfaces which bear against the housing, in particular on an end face of the housing.
- the webs act in contact with the housing as leaf springs or bending beams.
- supported transmission component is a ring gear and the planetary gear to a planetary gear.
- the symmetrical material weakening is designed as a single or multi-slot with at least two webs and at least one free space lying between them.
- the asymmetrically formed material weakening comprises webs of different widths.
- the narrower of the two webs arranged corresponding to the direction of rotation of the epicyclic gear and the wider of the two webs is the narrower of the webs with respect to the direction of rotation arranged trailing.
- the torque support comprises separate, the housing inner wall assigning surface sections.
- the proposed torque support also includes in a variant in the wider of the webs a notch-shaped depression, which serves as a material weakening.
- the manufacturing method for producing the inventively proposed torque support for a transmission component of a planetary gear is characterized in that distributed to a manufactured in plastic injection molding cover plate in the circumferential direction, torque supports are molded, which include a symmetrical or asymmetrical running material weakening.
- FIG. 1 shows the basic representation of the structure of the electrical circuit of an electrical machine, in particular of a starter for internal combustion engines
- FIG. 2 shows a perspective view of a support of a cover plate accommodating a ring gear of a planetary gear in the housing according to the prior art
- FIG. 3 shows a cover plate accommodated on the housing in FIG. 2 with supports according to the prior art
- FIG. 4 shows a first embodiment of a torque support on a cover plate, which accommodates a ring gear with asymmetric slitting
- FIG. 5 shows a further embodiment of the cover plate with symmetrically designed single slot in the area of the torque support
- Figure 6 shows a variant of the torque support on the cover plate with symmetrical double slots
- Figure 7 shows a further variant of the torque support with integrated damping on a cover plate formed in an asymmetric see slotting with material weakening.
- FIG. 1 shows a schematic diagram of the structure and electrical circuit of a starter for internal combustion engines.
- FIG. 1 shows that a starter 10 for an internal combustion engine has a pinion 12 accommodated on an armature shaft of an armature 26. This can be brought into engagement with a ring gear 2 of the internal combustion engine. The meshing of the pinion 1 in the pinion
- the planetary gear 20 has the general advantage that this has a very compact design with high achievable gear ratios. With the favorable meshing geometry of the planetary gear 20, high torques can be transmitted with low noise. Outwardly, the planetary gear 20 is free of transverse forces, so that the bearings of the shaft of the armature 26 and the drive shaft are loaded even at high power only with low shear forces.
- the planetary gear 20 includes a ring gear 44. Its drive via a sun gear 46, which is connected to the shaft of the armature 26 of the electric drive of the starter 10. At least two planet gears 48 are engaged with both the sun gear 46 and the internal teeth of the ring gear 44. During their rotation, the planet gears 48 drive the drive shaft via their bearing journals, on which the roller freewheel 16 is accommodated.
- the electric drive of the starter 10 further includes a pole piece 22, which is associated with a field winding 24.
- the pole pieces 22 enclose an armature 26.
- the electric drive of the starter 10 comprises a commutator 28, on the periphery of which a plurality of carbon brushes are employed.
- Above the electric drive of the starter 10 is the already mentioned engagement relay 30, which is actuated by means of a start switch 32.
- a start switch 32 By means of the start switch 32 is an electrical connection to a battery 34, which is also indicated in the schematic diagram of Figure 1, closed or opened.
- Figure 2 shows a variant according to the prior art, in which a cover plate is supported on a housing.
- a cover plate 42 comprises on its inner side a number of circumferentially arranged torque supports 50, hereinafter also referred to simply as supports 50. Of these, only one can be seen in the perspective view according to FIG. 2, since the other supports 50 formed on the circumference of the cover plate 42 on the end face facing the housing 62 are concealed by the housing 62.
- the transmission component in particular the ring gear 44 of the schematically indicated in Figure 1 epicyclic gear 20, for example, a planetary gear 20 is added.
- the protruding beyond the end face of the cup-shaped cover plate 42 extend in ways a closed support surface 60, and a first web 56 and a second web 58.
- the closed support surfaces 60, supported by the webs 56, 58 extend into receptacle - menuten 52, which are executed on a housing inner wall 54 of the housing 62.
- FIG. 3 shows a perspective view of the cover plate fastened to the housing in FIG.
- Circular gear 20 shown in FIG. 1 planetary gears 48 are received, which mesh with a sun gear 46.
- FIG. 4 is an embodiment variant of the solution proposed according to the invention for supporting a transmission component of a
- Supports 50 which are separated from each other are also formed in a 60 "graduation, unlike the solution according to FIG. 3, these supports 50 are shown in FIG An asymmetrical weakening of the material 64, in particular a single slit, results in a narrow web, see reference numeral 66, and a wider web, see position 68.
- the webs 66, 68 are asymmetric Material weakening 64 support surfaces 72, with which the Support 50 or the supports 50 on the front z. B. a drive bearing 40 abut.
- this transmission component 44 can also be made of plastic material with a lower mechanical strength.
- the cover plate 42 has a central passage opening 82. Due to the asymmetrically formed material weakening 64, in particular a slit of the support 50, formed on this separate Abstütz vomabitese 86.
- the position of the narrow web 66 and the wide web 68 is chosen so that this arrangement especially for loads is provided by planetary gears 48 of a planetary gear 20, seen from the starting pinion 12, seen in the direction of the starter motor, counterclockwise in the ring gear 44, which is to be supported in the cover plate 42 move.
- the wider of the two bridges, d. H. the web 68 is the trailing edge of the narrow web 66 in the rotation of the planet gears 48 counterclockwise.
- FIG. 5 shows a further embodiment of the torque support proposed according to the invention for a transmission component of a planetary gear.
- FIG. 5 shows that, at the end face, by means of the preferred way in the way of
- Plastic injection molding process manufactured cover plate 42 a number of supports is injection-molded, which is a symmetrical material weakening 70, preferably formed as a slit.
- a symmetrical material weakening 70 preferably formed as a slit.
- Each slot 70 has a first web 71 and another second web 73. Due to the slit arise the grooves 52 on the housing inner wall 54, each zu josde Abstütz vomabismee, see. Position 86.
- a free space which separates the first web 71 and the second web 73 from each other is indicated by reference numeral 80.
- each support surfaces 72 are formed at the end faces of the first web 71 and the second web 73, with the webs 71, 73, which are separated from each other by the free space 80, on the Abut the end face of the drive bearing 40.
- the webs 71 and 73 have the function of bending beams or leaf springs and offer due to the internal friction with respect to the end face of the drive bearing 40 an excellent damping potential.
- each separate surfaces 86 which abut each other in the circumferential direction spaced apart in receiving grooves 52 of the housing wall 54 of the housing 62 due to the separation.
- the number of receiving grooves 52 formed in the housing inner wall 54 of the housing 62 advantageously corresponds to the number of supports 50 having either an asymmetrical material weakening 64 or a symmetrical material weakening 70.
- FIG. 6 shows a further third embodiment variant of the torque support proposed according to the invention for a transmission component of a planetary gear.
- supports 50 which have a symmetrical material weakening 74, which is designed as a double slit in this third embodiment, are provided on the end face of the cover plate 42-separated from one another in the circumferential direction.
- the individual supports 50 each have two outer webs
- Figure 6 formed by symmetrically formed material weakening 74 as a double slit on the top of the supports 50 three separate Abstütz vomabroughe 86 which abut when mounting the cover plate 42 according to the embodiment in Figure 6 on the housing 62 on the surface of the grooves 52 of the housing inner wall 54.
- the symmetrical weakening of material 74 in the area of the supports 50 shown in the third embodiment variant according to FIG. 6 also achieves a targeted weakening of the support points of the ring gear 44 accommodated in the cover plate 42, which can now be made of plastic.
- the inventively proposed solution eliminates additional spring elements made of rubber-elastic material.
- the inventively proposed solution the relaxation of the plastic material from which the cover plate 42 is preferably made by way of plastic injection molding, from.
- the individual bars, cf. Position 66, 68 in Figure 4, positions 71, 73 in Figure 5 and the positions 76, 78 in Figure 6, serve as resilient elements, such as leaf springs or bending beam with a very high damping potential, so that jerking occurring torque loads and their Support by way of internal friction on the front side of the Antriebsla- 40 gers - to give an example - can be absorbed.
- FIG. 7 shows a further fourth embodiment variant of the torque support proposed according to the invention.
- the supports 50 which are formed in 60 "division on the front side of the cover plate 42, next to the narrow web 66 a wide web 68, in which a notch-shaped recess 84 extends. About this notch-shaped recess 84 of the wider slot 68 is weakened.
- the fourth variant of the solution proposed in accordance with FIG. 7 is likewise an asymmetrically designed material weakening 64, with the difference that the wider of the webs 66, 68 has a notch-shaped depression 84.
- the notch-shaped recess 84 does not extend to the support surface portions 86 at the top of the supports 50.
- the cover plate 42 includes a through hole 82 through which the armature shaft of the starter 10 extends.
- Reference numeral 88 denotes a shell of the cover plate 42, which is preferably manufactured by means of the plastic injection molding process.
- the supports 50 configured in different embodiment variants according to FIGS. 4, 5 and 6 can be formed directly on the cover plate 42 in one operation, without the need for further reworking of the same.
- the fourth embodiment of the proposed solution according to the invention shown in Figure 7 are located on the front side of the drive bearing 40 facing side of the webs 66, 68, the support surfaces 72 which abut against the end face of the drive bearing 40 and are biased against them.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Retarders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009001835A DE102009001835A1 (en) | 2009-03-25 | 2009-03-25 | Electric machine with integrated damping for a transmission component |
PCT/EP2010/053544 WO2010108849A1 (en) | 2009-03-25 | 2010-03-18 | Electrical machine having integrated dampening for a transmission component |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2411658A1 true EP2411658A1 (en) | 2012-02-01 |
EP2411658B1 EP2411658B1 (en) | 2017-01-18 |
Family
ID=42340675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10709524.2A Active EP2411658B1 (en) | 2009-03-25 | 2010-03-18 | Electrical machine having integrated dampening for a transmission component |
Country Status (7)
Country | Link |
---|---|
US (1) | US20120083377A1 (en) |
EP (1) | EP2411658B1 (en) |
JP (1) | JP2012521510A (en) |
CN (1) | CN102362065B (en) |
DE (1) | DE102009001835A1 (en) |
HU (1) | HUE033591T2 (en) |
WO (1) | WO2010108849A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010003431B4 (en) * | 2010-03-30 | 2019-05-16 | Seg Automotive Germany Gmbh | Starting device with ring gear and intermediate bearing damping |
DE102012203490A1 (en) | 2012-03-06 | 2013-09-12 | Robert Bosch Gmbh | Starter for an internal combustion engine |
CN103485956B (en) * | 2012-06-12 | 2016-02-10 | 罗伯特·博世有限公司 | For the starting arrangement of internal-combustion engine |
DE102012219044A1 (en) * | 2012-10-18 | 2014-04-24 | Robert Bosch Gmbh | Starting device for an internal combustion engine |
DE102013207875B4 (en) * | 2013-04-30 | 2021-03-18 | Seg Automotive Germany Gmbh | Starting device for an internal combustion engine |
DE102014209315B4 (en) * | 2014-05-16 | 2016-09-01 | Robert Bosch Gmbh | Starting device for an internal combustion engine |
DE102016220233A1 (en) | 2016-10-17 | 2018-04-19 | Seg Automotive Germany Gmbh | Epicyclic gearbox with integrated friction clutch for an electric machine |
KR102565988B1 (en) * | 2021-08-25 | 2023-08-09 | 두산에너빌리티 주식회사 | Exhaust diffuser system and gas turbine including the same |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2224525A (en) * | 1938-02-03 | 1940-12-10 | Bendix Aviat Corp | Engine starter drive |
US2237816A (en) * | 1938-07-25 | 1941-04-08 | Getz Benjamin | Engine starting device |
IT1223952B (en) | 1988-11-30 | 1990-09-29 | Magneti Marelli Spa | EPICYCLOIDAL REDUCER PARTICULARLY FOR STARTER MOTORS FOR INTERNAL COMBUSTION ENGINES |
DE4302854C1 (en) * | 1993-02-02 | 1994-06-09 | Bosch Gmbh Robert | Starting device for IC engine - has starter motor and free run coupling with spring accumulator for damping thrust-form torque variations |
EP1433977B1 (en) * | 1999-10-22 | 2006-06-21 | Denso Corporation | Shock absorber and overload protection device |
EP1347171A1 (en) | 2002-03-22 | 2003-09-24 | Valeo Mando Electrical Systems Korea Limited | Apparatus for absorbing impact of starter |
CN1448629A (en) * | 2002-04-02 | 2003-10-15 | 瓦莱奥万都电子系统(韩国)株式会社 | Actuator impact absorption apparatus |
US6993989B2 (en) * | 2002-04-26 | 2006-02-07 | Denso Corporation | Starting apparatus |
JP2005098252A (en) * | 2003-09-26 | 2005-04-14 | Denso Corp | Starter |
JP4165362B2 (en) * | 2003-10-08 | 2008-10-15 | 株式会社デンソー | Starter |
FR2902840B1 (en) * | 2006-06-27 | 2013-03-29 | Valeo Equip Electr Moteur | STARTING DEVICE FOR THERMAL ENGINE |
JP2008008225A (en) * | 2006-06-29 | 2008-01-17 | Denso Corp | Starter |
JP2008255949A (en) * | 2007-04-06 | 2008-10-23 | Denso Corp | Starter |
-
2009
- 2009-03-25 DE DE102009001835A patent/DE102009001835A1/en not_active Withdrawn
-
2010
- 2010-03-18 EP EP10709524.2A patent/EP2411658B1/en active Active
- 2010-03-18 CN CN201080013772.9A patent/CN102362065B/en not_active Expired - Fee Related
- 2010-03-18 WO PCT/EP2010/053544 patent/WO2010108849A1/en active Application Filing
- 2010-03-18 US US13/260,390 patent/US20120083377A1/en not_active Abandoned
- 2010-03-18 JP JP2012501252A patent/JP2012521510A/en active Pending
- 2010-03-18 HU HUE10709524A patent/HUE033591T2/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2010108849A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2411658B1 (en) | 2017-01-18 |
JP2012521510A (en) | 2012-09-13 |
WO2010108849A1 (en) | 2010-09-30 |
HUE033591T2 (en) | 2017-12-28 |
CN102362065A (en) | 2012-02-22 |
DE102009001835A1 (en) | 2010-09-30 |
CN102362065B (en) | 2014-07-30 |
US20120083377A1 (en) | 2012-04-05 |
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