• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a group transmission, comprising two transmission groups (1, 2) which lie so as to adjoin one another, are surrounded in each case in respectively associated housing parts (23, 24) of a common transmission housing (4), and between which a retarder (3) is arranged. In order to then integrate the retarder (3) into the group transmission with as little outlay on production as possible, at least one housing part (24) of the two transmission groups (1, 2) which lie so as to adjoin one another is at the same time involved in the configuration of a retarder housing.Fig. 1
    公开号:SE1550398A1
    申请号:SE1550398
    申请日:2015-04-02
    公开日:2015-10-08
    发明作者:Bernd Woelfle
    申请人:Zahnradfabrik Friedrichshafen；
    IPC主号:
    专利说明:

    lOGroup transmissionThe invention relates to a transmission,groupcomprising two transmission groups which lie so as toadjoin one another, are surrounded in each case inrespectively associated housing parts of a commontransmission housing, and between which a retarder isarranged.
    Retarders are used in motor vehicles and, in particularhere, in commercial vehicles and serve to relieve arespective service brake of the respective vehicle, forexample when driving along relatively long downhillsections. Here, retarders are usually configured in theform of hydrodynamic retarders which comprise a rotorand a stator. Here, the rotor is connected fixedly tothe respective shaft to be braked of the drive train soas to rotate with it and, has abladeinto a working space which is defined between the rotorjust like the stator,system. If a quantity' of liquid. is introducedand the stator,blademovement with the shaft and accelerates the said liquidTheliquid is subsequently supported on the blade system ofthe rotor drives the introduced liquidvia its system during its common rotationalin the direction of the blade system of the stator.the stator and is guided back to the blade system ofthe rotor again, this having a retarding action on therotor and therefore also the shaft.of theHere, the magnitudebraking torque to be brought about can beregulated via the introduced quantity of liquid. Here,within a drive train, a hydrodynamic retarder is alsopartially integrated into the transmission of therespective commercial vehicle, as a result of which theretarder is protected. as far as possible fromenvironmental influences and, in addition, lower noiseemissions can be achieved.lOA transmission of a motor vehicle is apparent from EP O635 413 Al, which grouptransmissions, two transmission groups which lie so astransmission has, asto adjoin one another in the form of a main group and arange group which is connected downstream of it. Here,the transmission groups are surrounded in a commontransmission housing which is assembled from aplurality of housing parts. Here, the transmissionhousing is split, inter alia, between the transmissiongroups, with the result that firstly the main group issurrounded by associated housing parts and secondly therange group is also enclosed by an associated housingpart.
    Furthermore, a hydrodynamic retarder is providedbetween the two transmission groups, which hydrodynamicretarder is arranged in a retarder housing which lieswithin the transmission housing and is thereforeintegrated into the group transmission. Here, theretarder housing is split in two, a stator of theretarder being configured in one piece with one housinghalf which is incorporated fixedly in terms of movementwith an assembly housing which is fastened on the sideof the of the Thesecond half of the retarder housing is then likewisehousing part main transmission.connected. fixedly' in terms of movement to the firsthalf and,the hydrodynamic retarder.together with it, encloses the inner rotor ofProceeding' from. the above-described. prior* art, it isthen the object of the present invention to provide agroup transmission, into which a retarder is integratedwith as little production outlay as possible.
    This object is achieved proceeding from theprecharacterizing clause of Claim l in conjunction withits characterizing features. The dependent claims whichfollow it in each case represent advantageousdevelopments of the invention.lOAccording to the invention, a group transmissioncomprises two transmission. groups which. lie so as toadjoin one another, are surrounded in each case inrespectively associated housing parts of a commonand between which a retarder isthetransmission housing,transmission isof thearranged. A housing ofgrouptherefore of split configuration, a divisionsaid transmission housing then being provided betweenthe transmission groups in the region of the positionof the retarder.
    In the context of the invention, the retarder ispreferably a hydrodynamic retarder which is composed ofa stator and a rotor, the rotor and stator beingprovided in each case with blade systems in a nmnnerskilleddefining a working space between them.is then arranged. on one of the shaftswith the result that, if athe of thewhich is known to a person in the art andHere, the rotorof the grouptransmission, liquid isintroduced into working space retarder,which liquid can be oil or else also water, a brakingaction is generated on the said shaft. In principle,however, the retarder can also be an electrodynamicretarder.
    The invention then comprises the technical teachingthat at least one housing part of the two transmissiongroups which lie so as to adjoin one another is at thesame time also involved in a configuration of aretarder housing. In other words, at least one of thehousing parts of the two transmission groups, betweenwhich the retarder is positioned, is therefore at thesame time also part of a retarder housing of theretarder.
    Here, a configuration of this type of a grouptransmission has the advantage that the productionoutlay of the group transmission according to theinvention can be reduced, by at least one housing partlOalso at the same time serving to configure a retarderhousing of a retarder which lies in between. A retarderhousing' part which would otherwise have to beadditionally provided can be dispensed with because thesaid at least one housing part performs a doublefunction, that is to say serves to enclose theassociated transmission group and the retarder. Ingeneral, the positioning of the retarder within atransmission housing has the advantage that theretarder is protected against environmental influencesand, in addition, noise emissions are reduced. Finally,a modular construction can be realised which, in themanner of a kit principle, makes the configuration of agroup transmission with a retarder or else without aretarder possible without problems. This is becausemerely the further retarder housing parts have to bearranged on the at least one housing part in order toconfigure the retarder housing.
    Although. a retarder is also integrated. into a grouptransmission in the case of EP O 635 413 Al, a retarderhousing is formed by separate retarder housing parts inthis case. To this extent,thenone of the housing parts ofat thewith. the result thattransmission groups serves same time toconfigure the retarder* housing,the production outlay is correspondingly increased.
    In accordance with one embodiment of the invention, inaddition to the at least one housing part, at least oneretarder housing part is involved in the formation ofthe retarder housing. In one development of thisembodiment, a transmissionthehousing part of a groupretarder housing together with an annularwhichresult, aformsretarder housing part and a statorof thehousingsupports a stator retarder. As aconfiguration of the retarder housing can be realizedwith low production outlay. As an alternative to theabovementioned development, however, a housing part ofa transmission group can also define the housing of thelOretarder together with a single, further retarderstator then likewisethe furthercase thethehousing' part, in thisbeing configured on side of oneretarder housing part. Furthermore, a retarder housingcan also be defined by interaction of the housing partsof the two transmission groups which lie so as toadjoin one another with an annular retarder housingpart.
    According to a further refinement of the invention, thestator housing additionally supports a stationary partof a shifting element of the transmission group whichlies in each case next to it. The stator housingtherefore additionally forms a part of a shiftingelement, via which a rotating component of thetransmission group which lies so as to adjoin it can bebrought to a standstill. As a result, a compactconstruction can be realized in the correspondingregion. Furthermore, it is additionally conceivablewithin the scope of the invention that the statorhousing additionally serves to receive a bearing of oneof the shafts of the group transmission.
    According to a further embodiment of the invention, ait can beof thetherotor of the retarder is guided such thatdisplaced axially with respect to a statorretarder. In a development of this embodiment,rotor is then guided via a helical toothing systemwhich brings about a displacement of the rotor in thedirection. of the stator during filling of a workingspace which lies between the rotor and the stator, therotor being prestressed by means of a spring element inan opposite direction to this. In other words, a rotorof the retarder can therefore be moved axially relativeto a stator of the retarder, the said rotor beingelement in anthevia atheprestressed oppositethespringdirection to stator in course ofdevelopment of the embodiment. Furthermore, the rotoris guided on a helical toothing system which converts alOrotation of the rotor into its movement with respect tothe stator during filling of the working space betweenthe the thetherotor and stator. Fan losses ofhydrodynamic retarder are low on account ofrelatively' great axial spacing' between. the rotor andthe stator which is set in the unfilled state. At thesame time, a movement of the rotor in the direction ofthe stator is automatically initiated by means of theguidance of the rotor on the helical toothing system,as soon as the working space is filled with liquid.
    Here, an axial travel of the rotor on the helicaltoothing system is particularly preferably limited viasecuring rings. Furthermore, the helical toothingsystem is provided, in particular, by a sleeve whichconnects shafts of the two transmission groups, whichlie so as to adjoin one another, to one another.
    However, guidance of the rotor on a helical toothingsystem can also be realized by an individual shaft ofone of the two transmission groups.
    It is a further refinement of the invention that arotor of the retarder is incorporated into the forceflow via a step-up stage. As a result, a rotationalspeed of the motor and therefore also a braking effectwhich can be produced can advantageously be increased.in the context of the invention,Here, a step-up stagecan be realized. as a spur gear stage or else as aplanetary stage.In one development of the invention, the retarder isarranged. spatially' between. a main group and. a rangegroup. Here, the main group is preferably configured asa spur gear multi-step transmission with a plurality ofspur gear stages which define individual transmissionratios, whereas the range group is present, inparticular, as a planetary transmission.lOAccording to a further, advantageous embodiment of theinvention, a rotor of the retarder is coupled. to adriven shaft or to a shaft which connects thetransmission groups to one another. In the second-mentioned case, a braking action of the retarder cantherefore also be transmitted via the transmissiongroup which follows in the force flow direction,whereas, in the first-mentioned case, a braking actioncan be caused even when the following transmissiongroup is shifted into neutral. To this extent, in thelast-mentioned case, braking can be carried out via theretarder even when a shift operation is being carriedout in the following transmission group.
    In one development of the invention, a rotor of theretarder is provided axially on both sides with in eachcase one blade system, opposite which in each case oneThecan beassociated blade lies.whichincreased significantly as a result of a double rotorof thisstator with an systembraking action can be brought abouttype with. stators which. lie axially' on bothsides.
    Furthermore, it is conceivable within. the context ofthe invention to provide a heat exchanger in the regionof the receptacle of the retarder on the housing of thegroup transmission, via which heat exchanger heat whichis produced. during' operation. of the retarder can bedischarged. As a result, an excessively hightemperature in this region can be prevented.The invention is not restricted to the specifiedcombination of the features of the main claim or of theclaims which are dependent thereon. Moreover, optionsarise to combine individual features with one another,even in so far as they are apparent from the claims,the following description of preferred embodiments ordirectly from the drawings. The reference of the claimsto the drawings by way of using reference numerals islOnot intended to restrict the scope of protection of theclaims.
    Advantageous refinements of the invention which will beexplained in the following text are shown in thedrawings, in which:Fig. l shows a diagrammatic illustration of a grouptransmission in accordance with a firstembodiment of the invention,Fig. 2 shows a sectional view of the grouptransmission from Fig. l,Fig. 3 shows a diagrammatic view of a grouptransmission in accordance with a secondpossible refinement of the invention,Fig. 4 shows a diagrammatic illustration of a grouptransmission according to a third embodimentof the invention,Fig. 5 shows a diagrammatic view of a grouptransmission in accordance with a fourthpossible refinement of the invention, andFig. 6 shows a diagrammatic illustration of a grouptransmission in accordance with a fifthembodiment of the invention.transmission inA diagrammatic view of agroupaccordance with a first embodiment of the invention isapparent from Fig. l, the said group transmission beingl and 2,just like thecomposed. of two transmission. groups betweenwhich a retarder 3 is accommodated. Here,transmission groups l and 2, the retarder 3 is likewiseaccommodated in a transmission housing 4 of the grouptransmission and is intoaccordingly' also integratedthe group transmission.
    In the present case,thethe transmission group 1 is a maingroup of group transmission, whereas thetransmission group 2 is configured. as a range groupthereof. Asthewhich is connected downstreamadditionally beCanseen from Fig. 1, transmissiongroup 2 is configured here in a planetary design with aplanetary stage 5, the sun gear 6 of which is coupledto the output of that transmission. group 1. which isconnected. upstrean1 of it and. the planet spider' 7 ofwhich. is connected. to a stage 5transmission.thestill remaining' internal gear* 9 ofplanetary can either be brought to astandstill via a shifting device 10 or else can becoupled fixedly to the planet spider 7 so as to rotatewith it, in order to produce two different transmissionratios of the transmission group 2.
    The retarder 3 which is seated between the transmissiongroups 1 and 2 is configured as a hydrodynamic retarderand accordingly has a stator 11 and a rotor 12 which isconnected to the output of the transmission group 1 andthe sun gear 6 of the transmission group 2 andtherefore its drive. As can be seen, in particular,from. the sectional view in Fig. 2, the rotor 12 isplaced. here on a sleeve 13 which. connectsshaft 14input shaft 15 of the transmission group 2an outputof the transmission group 1 fixedly' to anso as torotate with it. Here, the sleeve 13 guides the rotor 12axially displaceably on a helical toothing system 16,on which the rotor 12 can be moved axially relative tothe stator 11. Here, a displacement of the rotor 12 inthe direction of the stator 11 takes place counter to aspring element 17 which lies in between and prestressesthe rotor 12 into a first position. Fan losses whichare caused by circulation of air between blade systems19 and 20 of the stator 11 and the rotor 12 are low onaccount of the spacing between the stator 11 and therotor 12 in this first position.
    If, however, a liquid is then introduced into theworking' space 18, the said. liquid. is driven. via theblade system 20 of the rotor 12 and is conveyed in thedirection of the stationary blade system. 19 of thestator 11, where it is supported and is in turn guidedback to the blade system. 20 of the rotor 12. Fromfilling of the working space 18, the rotor 12 isrotated on account of the support of the liquid on thebladetoothing system 16 into an axial movement of the rotorsystem. 20, which is converted. via the helical12 counter to the spring element 17. As a consequence,the rotor 12 is moved towards the stator 11 counter tothe spring element 17, and the spacing between thestator 11 and the rotor 12 is reduced in this way. Thetwo possible axial positions of the rotor 12 aredefined by two securing rings 21 and 22 on the sleeve13.
    As a special feature, the transmission. housing 14 isthen formed by two housing parts 23 and 24 and aretarder housing' part 25, the housing' part 23substantially' enclosing' the transmission group 1 andthe housing part 24 enclosing the transmission group 2.Here, the housing part 24 is at the same time also partof a retarder housing 26, in which the retarder 3 isencapsulated within the group transmission. As can beseen in Fig. 2, the said retarder housing 26 is thusformed. by the housing' part 24, the retarder housingpart 25 and a stator housing 27, of which the latter atthe same time also forms the stator blade system 19.The housing part 24 therefore assumes a double functionwithin the transmission housing 4, namely the enclosingof the transmission group 2 and also of the retarder 3.transmissionFurthermore, a formation of agroupin between can inthewithout a retarder 3 which liesprinciple also be realized on account ofpositioning of the retarder housing part 25 between thehousing parts 23 and 24; optionally either' a housinglOllpart which bridges the spacing is then to be providedbetween the housing parts 23 and 24 or else the twohousing parts 23 and 24 are fastened directly to oneanother.
    Apart from. the configuration of the stator ll, thestator housing 27 also serves to receive a bearing 28,which theFurthermore,via sleeve l3 is mounted. rotatably.the stator housing 27 guides a clutch body29 as a stationary part of a shifting element of thewhicha heat exchanger 30 is also arranged in thetransmission group l lies adjacently. Inaddition,region of the retarder housing part 25, via which heatexchanger 30 the heat which is produced duringoperation of the retarder 3 can be discharged.Furthermore, a diagrammatic illustration of a grouptransmission in accordance with a second possiblerefinement of the invention is apparent from Fig. 3.
    Here, this refinement corresponds substantially to thevariant according to Figs l and 2, a difference beingthat the rotor 3l of a retarder 32 is not incorporateddirectly, but rather via a step-up stage 33 between thetransmission groups l and 2. Here, the step-up stage 33is realized as a planetary stage 34,the stage 34stator 36 of the retarder 32,a sun gear 35 ofplanetary being coupled rigidly to awhereas the rotor 3l isconnected to a planet spider 37 of the planetary stage34 and an internal gear 38 is connected to the outputof the transmission group l and the input of thetransmission group 2 which is connected downstream.Otherwise, the refinement according to Fig. 3corresponds to the variant according to Figs l and 2,with the result that reference is made to what has beendescribed in this regard.
    Furthermore, a third embodiment of a group transmissionis apparent from Fig. 4, this variant corresponding asfar as possible to the embodiment according to Fig. 3.12In contrast thereto, the internal gear 38 of the step-to the output oftheup stage 33 is not attached, however,the transmission group 1 and the input oftransmission group 2, but rather is connected fixedlyto the planet spider 7 and therefore also the drivenshaft 8 so as to rotate with them. As a consequence, abraking' action can be generated. via the retarder 32even when a shift operation is being performed in thetransmission group 2. Otherwise, the refinement thencorresponds to the variant according to Fig. 3, withthe result that reference is made to what has beendescribed in this regard.
    Furthermore, Fig. 5 shows a diagrammatic view of agroup transmission in accordance with a fourth possiblerefinement of the invention. in contrast to the1 and 2,equipped with two stators 40 and 41,Here,variant according to Figs a retarder 39 isbetween which arotor 42 runs which is provided axially on both sideswith bladeaction can be generated in interaction with the stators40 and 41 by thetherefore configured as a double rotor than is possiblesystems. A considerably higher brakingway of said rotor 42 which isin the case of a rotor and a stator with in each caseonly one blade system.
    Finally, a diagrammatic illustration of a grouptransmission in accordance with a fifth embodiment ofthe invention is also apparent from Fig. 6. Here, thisembodiment corresponds substantially to the variantaccording to Fig. 4, a step-up stage 43 being formed by44 and 45Whereas the spur gear stage 44 couples a rotor 46 ofthe retarder 47 to a shaft 48, the said shaft 48 is intwo spur gear stages in contrast thereto.turn connected by means of the spur gear stage 45 tothe driven shaft 8 of the group transmission. To thisextent, a rotational movement of the driven shaft 8 isstepped out via the two spur gear stages 44 and 45 intoa rotational movement of the rotor 46.13A retarder with low production outlay can be integratedinto a housing of the respective transmission by meansof the refinements according to the invention of agroup transmission.
    权利要求:
    Claims (10)
    [1] 1. Group transmission, comprising two transmission groups (1, 2) which lie so as to adjoin one another,are surrounded in each case in respectively associated(23, 24) housing parts of a common transmission housing (4), and between which a retarder (3; 32; 39; 47) isarranged, characterized. in that at least one housingpart (24) of the two transmission groups (1, 2) whichlie so as to adjoin one another is at the same timeinvolved in a configuration of a retarder housing (26).
    [2] 2. Group transmission according to Claim 1, characterized in that, in addition to the at least one housing part (24), at least one retarder housing part(25) is involved in the formation of the retarderhousing (26).
    [3] 3. Group transmission according to Claim 2,characterized in that a housing part (24) of atransmission group (2) forms the retarder housing (26)together with an annular retarder housing part (25) anda stator housing (27) which supports a stator (11; 36;40) of the retarder (3; 32; 39; 47).
    [4] 4. Group transmission according to Claim 3,characterized in that the stator housing (27) additionally supports a stationary part of a shiftingelement of the transmission group (1) which lies in each case next to it. transmissioncharacterized in that aretarder (3; 32; 47) is
    [5] 5. Group according to Claim 1, rotor (12; 31; 46) of theguided. such. that it can bedisplaced axially with respect to a stator (11; 36) of the retarder (3; 32; 47). _l5_
    [6] 6. Group transmission according to Claim 5,characterized in that the rotor (12; 31; 46) is guidedvia a helical toothing system (16) which brings about a displacement of the rotor (12; 31; 46) in the directionof the stator (11; 36) during filling of a workingspace which lies between the rotor (12; 31; 46) and thestator (11; 36), the rotor (12; 31; 46) beingprestressed. by' means of a spring' element (17) in anopposite direction to this.
    [7] 7. Group transmission according to Claim 1,characterized in that a rotor (31; 46) of the retarder(32; 47) is incorporated. into the force flow via astep-up stage (33; 43).
    [8] 8. Group transmission according to Claim 1, characterized in that the retarder (3; 32; 39; 47) isarranged between a main group and a range group.
    [9] 9. Group transmission according to Claim 1,(12; 31; 42; 46) of the is coupled to a driven shaft characterized in that a rotorretarder (3; 32; 39; 47) (8) or to a shaft which connects the transmissiongroups to one another.
    [10] 10. Group transmission according to Claim 1, (42) (39) is provided axially on both sides with in each case one characterized in that a rotor of the retarder blade system, in each case one stator (40, 41) opposite which with an associated blade system lies.
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    同族专利:
    公开号 | 公开日
    DE102014206680A1|2015-10-08|
    CN204628506U|2015-09-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4324460C1|1993-07-21|1994-11-24|Daimler Benz Ag|Change-speed gearbox for motor vehicles with a sustained-action brake |DE102016223016A1|2016-11-22|2018-05-24|Zf Friedrichshafen Ag|Method for switching control of an automated group transmission|
    法律状态:
    2017-01-31| NAV| Patent application has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014206680.8A|DE102014206680A1|2014-04-07|2014-04-07|group transmission|
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