• 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 permanent brake device for a drive train of a motor vehicle, comprising a pump (2) which is provided as a hydrostatic retarder (1) and is coupled to a shaft of a transmission (3) . In order to make a compact construction of the permanent brake device possible, the pump (2) is integrated into the transmission (3) .Fig. 1
    公开号:SE1550397A1
    申请号:SE1550397
    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:

    lO1520253035distinguished at the same time, however, by a compactconstruction.
    This object is achieved proceeding from theprecharacterizing clause of Claim l in conjunction withits characterizing features. The dependent claims whichfollow it in each case show advantageous developmentsof the invention.
    According to the invention, a permanent brake devicefor a drive train of a motor vehicle comprises a pumpwhich is provided. as a hydrostatic retarder and isconnected to a shaft of a transmission.theThe pump whichis coupled to transmission therefore serves togenerate a braking torque which has its origin in thetorque which is tapped off by the pump when conveyingfluid.pressure accumulator,Here, the pump preferably conveys fluid into afrom which the fluid can escapeback via a throttle point into a storage vessel forfluid.pressure accumulator can possibly also be utilized bywith theHowever, the fluid which is conveyed into theother systems of the respective motor vehicle,result that a recuperation of braking energy isperformed as it were.
    The invention then comprises the technical teachingthat the pump is integrated into the transmission. Inother words, the pump which operates as a hydrostaticretarder is therefore arranged within a housing of thetransmission, with the result that a compactarrangement thereof is possible and at the same timereliable protection against environmental influencescan also be realized. Furthermore, it is possible as areducetheresult to production since certainpump, feedcan possibly also be configured by theoutlay,components of such as lines anddischarge lines,transmission housing of the transmission.lO1520253035In contrast to this, the pump in the case of DE 197 35287 Al is provided separately from the transmission onthe drive train. To this extent, the pump is subjectedto environmental influences in some circumstances andthe installation space is enlarged correspondingly onaccount of the arrangement.
    According to one embodiment of the invention, thetransmission. is a group transmission, the pump beingarranged between a main group and a range group of thegroup transmission in one development of saidembodiment. Here, the range group is preferablyconfigured as a planetary gear mechanism with aplanetary stage which is then composed in a way whichis known to a person skilled in the art of an internalandgear, a planet spider which guides planetary gears,a sun gear, a configuration as a negative planetary setor as a positive planetary set being possible here inprinciple.refinement of theto which theAccording to one developinginvention, that shaft of the transmission,pump is coupled, connects the main group and the rangegroup to one another. As an alternative, the shaft isan output shaft of the transmission. Whereas a brakingaction which can be caused by the pump can thereforestill be stepped up correspondingly by the range groupin the first-mentionedwhich. is connected. downstreamcase, a braking torque can also be caused at wheels ofthe motor vehicle in the second-mentioned case when ain theshifting operation is currently taking placerange group.
    It is a further embodiment of the invention that adelivery volume of the pump is variable. Here, the pumpthen delivers liquid only in braking phases, with theresult that a braking torque is generated only at theTheconfigured as adesired times. particularly preferablywhichpump ispendulum-slider pump, inlO1520253035different delivery volumes can be produced withoutproblems by way of corresponding deflections. In orderto keep losses as low as possible in the process, anouter ring of the pendulum-slider pump is nwunted inits housing such that it can be rotated via an anti-friction bearing in one development of the invention.theThe restricted tocombination of features of the main claim or the claimsinvention is not specifiedwhich are dependent thereon. Moreover, possibilitiesarise to combine individual features with one another,even in so far as they are apparent from the claims,the following description of preferred embodiments ofthe the Thereference of the claims to the drawings by way of theinvention or directly from drawings.use of designations is not intended to restrict thescope of protection of the claims.
    Advantageous refinements of the invention which will beexplained in the following text are shown in thedrawings, in which:Fig. 1 shows a diagrammatic view of a permanentbrake device in accordance with a firstembodiment of the invention, andFig. 2 shows a diagrammatic illustration of apermanent brake device according to a secondpossible refinement of the invention.
    Fig. 1 shows a diagrammatic view of a permanent brakedevice in accordance with a first embodiment of theinvention, which permanent brake device has ahydrostatic retarder] _ in the fonn of za pump 2, thepump 2 being a pendulum-slider pump. An outer ring ofsaid pendulum-slider pump ii; mounted iJ1 a housing ofit can be rotated via an anti-thethe pump 2 such thatfriction bearing. Here, pump 2 is additionallyintegrated into a transmission 3 which is designed as a101520253035group transmission with a main group 4 and a rangegroup 5 which is connected downstream of the main group4.
    As can be seen fron1 Fig. 1, the pump 2 is arrangedbetween the main group 4 and the range group 5 and isdriven here via a shaft 6 which connects the main group4 on the output side to the input side of the rangegroup 5.
    Away from braking operation, the pump 2 is actuated insuch a way that no delivery or virtually no delivery ofa liquid takes place and accordingly only very smalltorque losses are also introduced into the shaft 6 as aresult of the coupled motion of the pump 2. If brakingof the motor vehicle is then to be realized with theaid of the theactuatedhydrostatic retarder 1, pump 2 isits increasedthewhichdelivery of the liquid takes place here into a pressureand delivery quantity isdelivery quantity defining thethe shaft 6 here. Acorrespondingly,braking torque acts onaccumulator (not shown in further detail in the presentcase) and counter to a throttle point.
    In the present case, the range group 5 which isconnected downstream. of the pump 2 is formed by aplanetary stage 7 which is composed of the componentsinternal gear 8, planetary carrier 9 and sun gear 10.gear 10 is arranged fixedly on the shaftwith it, theHere, the sun6 so as to rotate whereas planetarycarrier 9 is connected. to an output shaft 11 of thetransmission 3. In order to produce differenttransmission ratios of the range group 5, the internalgear 8 can firstly 'be fixed. on. a housing '13 of thetransmission 3 by næans of a shifting device 12, andsecondly can be coupled fixedly to the planetarycarrier 9 and therefore also the output shaft 11 so asto rotate with it. On account of the arrangement of thepump 2 in the force flow, braking of the motor vehicle10152025can be produced. via the hydrostatic retarder ~ l onlywhen one of the two transmission ratios is selected inthe range group 5.
    Furthermore, a diagrammatic illustration of a permanentbrake device in accordance with a second possiblerefinement of the invention is apparent from Fig. 2.
    Here, this refinement corresponds as far as possible tothe variant according to Fig. 1, in contrast to this apump 14 being connected to the planetary carrier 9 ofthe range group 5 and therefore also the output shaftll. In order to connect the range group 5 to the maingroup 4 which is upstream of it, a shaft 15 is thenguided axially through the pump 14 here. Otherwise, therefinement according to Fig. 2 corresponds to thevariant according to Fig. 1, with the result thatreference is made to what has been described in thisregard.
    By means of the refinements according to the inventionhigh braking torques cantheof a permanent brake device,already be produced even at low rotational speeds,devices being distinguished in each case by a compactconstruction.
    权利要求:
    Claims (8)
    [1]
    Permanent brake device for a drive train of a motor vehicle, comprising a pump (2) which is provided as a hydrostatic retarder (l) and is coupled to a shaft (3), (2) is integrated into the transmission characterized in that the pump (3). of a transmission
    [2]
    2. Permanent brake device according to Claim l, characterized in that the transmission (3) is a group transmission.
    [3]
    3. Permanent brake device according to Claim 2, characterized in that the pump (2) is arranged between a main group (4) and a range group (5) of the group transmission.
    [4]
    4. Permanent brake device according to Claim 3, characterized in that the shaft (6) connects the main group (4) and the range group (5) to one another.
    [5]
    5. Permanent brake device according to Claim 3, characterized in that the shaft is an output shaft (ll) of the transmission (3).
    [6]
    6. Permanent brake device according to Claim l, characterized in that a delivery volume of the pump (2) is variable.
    [7]
    7. Permanent brake device according to Claim 6, characterized in that the pump (2) is a pendulum-slider pump. 8. Permanent brake device according to Claim 7, characterized in that an outer ring of the pendulum- slider pump is mounted in its housing such that it can be rotated via an anti-friction bearing. 9. Drive train of a motor vehicle, comprising a permanent brake device according to one of Claims l to
    [8]
    8.
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    同族专利:
    公开号 | 公开日
    DE102014206679A1|2015-10-08|
    CN204845898U|2015-12-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3536928A1|1984-10-24|1986-04-30|Zahnradfabrik Friedrichshafen|DRIVE ARRANGEMENT FOR COMMERCIAL VEHICLES|
    DE19735287A1|1997-08-14|1999-02-18|Zahnradfabrik Friedrichshafen|Hydrostatic retarder|
    DE102006046965A1|2006-06-02|2007-12-06|Bosch Rexroth Ag|Drive with brake energy recovery|
    DE102012208244A1|2012-05-16|2013-11-21|Zf Friedrichshafen Ag|Vehicle transmission with a hydrodynamic retarder|
    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
    DE102014206679.4A|DE102014206679A1|2014-04-07|2014-04-07|Durable braking device for a drive train of a motor vehicle|
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