US 8,474,566 B2Granted

Shaft drive type motorcycle

AssigneeHonda Motor Co., Ltd.

InventorsTaisuke Nimura, Hidetoshi Toyoda, Yusaku Yamashita

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Abstract

A shaft drive type motorcycle includes a drive shaft for permitting a reduction in the vehicle weight. The shaft drive type motorcycle includes a gear box provided at a rear part of a swing arm with a bearing provided between the gear box and a rear wheel axle. The bearing includes an outer race and balls and an inner race operative provided to rotatably support the rear wheel axle. A presser flange is provided between the rear wheel axle and a rear wheel that includes a hollow cylindrical part pressing the inner race in the axial direction of the rear wheel axle. A flange part is provided as part of the presser flange to which a brake disc is mounted. A labyrinth structure is provided for making it difficult for oil from leaking out of the gear box.

Claims20

Dependent claims

A shaft drive type motorcycle comprising:

a body frame;
a swing arm provided on said body frame and operative to swingably support a rear wheel;
a drive shaft provided in said swing arm or adjacently to said swing arm for supplying a driving force of an engine to be transmitted to a rear wheel axle operatively connected to said rear wheel;
a pinion gear provided at one end of said drive shaft and meshed with a final gear provided on said rear wheel axle;
a gear box provided at a rear part of said swing arm and accommodating said final gear;
and
a bearing provided between said gear box and said rear wheel axle, said bearing including an outer race and balls and an inner race, and said bearing is operative to rotatably support said rear wheel axle;
wherein a presser flange includes a hollow cylindrical part, said hollow cylindrical part engages the inner race to press the inner race in an axial direction of said rear wheel axle, said presser flange being provided between said rear wheel axle and said rear wheel;
and
said presser flange is provided with a flange part in a radial direction of said rear wheel axle and to which a brake disc is mounted.

7 more elements

A shaft drive type motorcycle comprising:

a body frame;
a swing arm provided on said body frame and operative to swingably support a rear wheel;
a drive shaft provided in said swing arm or adjacently to said swing arm and by which a driving force of an engine is transmitted to a rear wheel axle provided in said rear wheel;
a pinion gear provided at one end of said drive shaft and meshed with a final gear provided on said rear wheel axle;
a gear box provided at a rear part of said swing arm and accommodating said final gear;
wherein said gear box is provided with an opening part through which to pass said rear wheel axle;
said rear wheel axle is equipped with a pulser ring for measurement of wheel speed of said rear wheel;
and
a labyrinth wall part extending to an inner side of said opening part in the vehicle width direction is integrally provided on a radially inner side of said pulser ring.

6 more elements

Dependencies are inferred from the claim text.