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WO 2015/097631 Al 2 July 2015 (02.07.2015) P O P C T

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WO 2015/097631 Al 2 July 2015 (02.07.2015) P O P C T (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2015/097631 Al 2 July 2015 (02.07.2015) P O P C T (51) International Patent Classification: BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, B60K 17/04 (2006.01) B60K 7/00 (2006.01) DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, (21) International Application Number: KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, PCT/IB20 14/067 195 MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, (22) International Filing Date: PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, 2 1 December 2014 (21 .12.2014) SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (25) Filing Language: English (84) Designated States (unless otherwise indicated, for every (26) Publication Language: English kind of regional protection available): ARIPO (BW, GH, (30) Priority Data: GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, P1300754 23 December 201 3 (23. 12.2013) HU TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, (71) Applicant: RABA FUTOMU KFT. [HU/HU]; Martin it DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, 1., H-9027 Gyor (HU). LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, (72) Inventors: LELKES, Mark; Bornemissza u. 7., H-1 119 GW, KM, ML, MR, NE, SN, TD, TG). Budapest (HU). PATAI, Patrik; Tarogato u. 83/a, H-9028 Gyor (HU). Published: (74) Agent: KRAJNYAK, Andras; Dr. Krajnyak & Partner — with international search report (Art. 21(3)) Law and Patent Office, Logodi u. 5-7., H-1012 Budapest — before the expiration of the time limit for amending the (HU). claims and to be republished in the event of receipt of (81) Designated States (unless otherwise indicated, for every amendments (Rule 48.2(h)) kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, (54) Title: PORTAL AXLE ARRANGEMENT 19 14 13 14 18 16 15 T Fig. 4 l (57) Abstract: A portal axle arrangement, comprising an input axle shaft (22), an input spiral bevel gear (23), in connection with a © differential drive (24), output transverse shafts (25) in connection with said differential drive (24), for each output transverse shaft (25), a gear unit having a transmission gear ratio, a wheel axle formed by a half shaft (33) having a longitudinal axis positioned high er than the longitudinal axis of the transverse shaft (25) associated with the gear unit, wherein a further gear (30) is formed at the in o ner end of each of the output half shafts (33), each gear unit is equipped with a further transmission gear (27) having internal tooth - ing (28) in geared connection with the relating transverse shaft (25). The transmission gear (27) is associated with a gear (26) formed at the end of the transverse shaft (25) through its internal toothing (28), and the gear (30) formed at the end of the output half shaft (33) is connected to the gear (27) outside of a plane (PI) defined by the longitudinal axes of the transverse shaft (25) output half shaft (33) and the output half shaft (33). Portal axle arrangement The invention relates to a portal axle arrangement, comprising an input axle shaft, an input spiral bevel gear, a differential drive in connection with said input spiral bevel gear, output transverse shafts in connection with said differential drive, for each output transverse shaft, a gear unit having a transmission gear ratio and associated with the transverse shaft, a wheel axle formed by a half shaft having a longitudinal axis posi tioned higher than the longitudinal axis of the transverse shaft associated with the gear unit. It is necessary for the driven axles of low-floor vehicles (buses, trolley buses) to have a portal axle arrangement. Due to highly different gear ratio requirements of the driven- gear transmission of drive trains of vehicles with internal combustion (Diesel, CNG etc.) engines or electric drive (trolley-buses) - most often a gear ratio of 1:5 for internal combustion engines and a gear ratio of 1:10 for electrically driven ones - , the design of the respective running gears is completely different, and the various build-ups have few common components. In electric drives, due to their increased space requirement, only the drum brake design is feasible, instead of that of the up-to-date disc brake. US 20110259657 A l discloses several hybrid vehicle drive trains that have the common feature of applying one or several electric motors essentially assigned to various com ponents of the drive chain, but no specific designs, structural considerations are dis- closed that would make the feasibility of the proposed solution likely and that would provide those skilled in the art adequate guidance for its implementation and further de velopment. Considering the above, there is a strong need for a portal axle arrangement that makes a hybrid drive feasible without the need to fully redesign the running gears of the various transport devices and/or makes it economical to convert the existing vehicle pool into one with a hybrid drive without the need for any special tools, knowledge and personnel requirements. The object of the present invention is to disclose a solution that is suitable for being in tegrated into vehicles driven by an internal combustion engine or an electric drive due to its modular structure. Our object is, moreover, to make the up-to-date disc-brake de sign feasible in both cases. The task set has been solved by a portal axle arrangement comprising an input axle shaft, an input spiral bevel gear, a differential drive in connection with said input spiral bevel gear, output transverse shafts in connection with said differential drive, for each output transverse shaft, a gear unit having a transmission gear ratio and associated with the transverse shaft, a wheel axle formed by a half shaft having a longitudinal axis posi tioned higher than the longitudinal axis of the transverse shaft associated with the gear unit. A further gear is formed at the inner end of each of the output half shafts, the gear units are equipped with a further transmission gear having internal toothing in geared connection with the transverse shaft, said further transmission gear is associated with a gear formed at the end of the transverse shaft through its internal toothing, wherein the gear formed at the end of the output half shaft is connected to the gear having internal toothing outside of a plane defined by the longitudinal axes of the transverse shaft and the output half shaft. In a preferred embodiment of the portal axle arrangement according to the invention the gear unit is associated with an electric motor. In a further preferred embodiment the gear provided with internal toothing is associated with the electric motor. In a further preferred embodiment of the portal axle arrangement according to the in vention the rotor of the electric motor is formed on the outer mantle of the gear having internal toothing. In a further preferred embodiment the rotor of the electric motor is formed uniaxially with the mantle of the gear having internal toothing, as a projection in a direction along the longitudinal axis of said gear. In a further preferred embodiment electric motors are associated with the gears of the gear unit connected to the output half shaft. The electric motors are preferably connected to a common electric control unit. The characteristics and advantages of the present invention will be more apparent from the following description given by way of example of the new portal-type design and with reference to the appended figures, where: show schematically currently known hybrid drive train variants, illustrates an entire drive train of the portal axle arrangement accord ing to the invention, illustrates schematically a possible embodiment of the portal axle ar rangement according to the invention integrated into a vehicle hav ing a so called mild hybrid drive system, illustrates unvarying and vehicle- specific parts of the drive train of the portal axle arrangement according to the invention, illustrates the implementation of a possible modification of the revo lution number and the torque in several discrete stages, illustrates a possible embodiment of the first gear ratio stage of the gearing drive train responsible for the modification of the rotational speed and the driving torque according to Figure 5, illustrates a possible embodiment of the second gear ratio stage of the gearing drive train responsible for the modification of the rota tional speed and the driving torque according to Figure 5, illustrates a possible embodiment of the arrangement of the elements constituting the second gear ratio stage shown in Fig. 7, illustrates a possible embodiment of the third gear ratio stage of the gearing drive train responsible for the modification of the rotational speed and the driving torque according to Figure 5, illustrates a possible embodiment of the third gear ratio stage of the gearing drive train responsible for the modification of the rotational speed and the driving torque in a diesel driven motor vehicle, illustrates a possible embodiment of the third gear ratio stage of the gearing drive train responsible for the modification of the rotational speed and the driving torque in an electrically driven motor vehicle, and Figure 12 illustrates schematically a possible embodiment of the portal axle ar rangement according to the invention integrated into a low-floor ve hicle having a hybrid drive system.
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