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(11)    Patent No :    AP 2737    (73) Applicant(s)       
(21)    Application No :    AP/P/2010/005125    YAMAHA HATSUDOKI KABUSHIKI KAISHA, 2500 Shingai,       
            Iwata-shi, Shizuoka 4388501,       
(22)    Filing Date :    13.08.2008    Japan       
(24)    Date of Grant &    02.09.2013           
(45)    Publication :

(30)    Priority Data                    (72) Inventors   
    (33) Country    (31)    Number    (32) Date    MURAYAMA Takuji, Japan   
    JP            2007    -214314    21.08.2007    OISHI Akifumi, Japan   
    JP            2008    -204925    08.08.2008       
                            (74) Representative   
(84)    Designated State                   
    BW    GM    GH    KE    LS    MW    MZ   NA   SL    HONEY & BLANCKENBERG   
    SD    SZ    T Z    UG    ZM    ZW           
(51)    International    Classification    F16H 3/093 (2006.01)   

(54)    Title

Stepped automatic transmission device, power unit with the transmission device, and motorcycle with the power unit

(57)    Abstract

To provide a transmission, which is compact in an axial direction of an input shaft and in which a distance between the input shaft and an output shaft is relatively short.

A transmission 31 includes a first rotating shaft 53, a second rotating shaft 54, and a third rotating shaft 64, each of which is arranged in a direction perpendicular to an axial direction of an input shaft 52, a first clutch 55, a first

change gear pair 86 including a first gear 58 and a second gear 63, which rotate together with an output side clutch member 57, a first transmission gear pair 84 including a third gear 87, which rotates together with the first rotating shaft 53, and a fourth gear 75, a second transmission gear pair 85 including a fifth gear 74, which rotates together with the second rotating shaft 54, and a sixth gear 78, a second clutch 70, and a second change gear pair 91 including a seventh gear 73, which rotates together with an output side clutch member 72, and an eighth gear 77. At le ast one of an axis C2 and

(56)    Documents Cited :    GB-921868    JP-57022448    JP-U-58107927


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