DRIVING DEVICE FOR MOTOR CYCLE

• Main Authors: YAMAMOTO KOHEI, HAYASHI TSUNEMORI
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2016
• Subjects: AXLES FOR WHEELS OR CASTORS; CASTORS; CYCLES; INCREASING WHEEL ADHESION; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; PERFORMING OPERATIONS; POWERED PROPULSION OF SLEDGES OR; RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES; TRANSPORTING; VEHICLE WHEELS; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To provide a driving device for a motor cycle in which an endless drive chain which transmits power from a power source is wound around a driven sprocket to be fixed to a rear wheel, which prevents the drive chain from getting caught between nuts and between hubs while avoiding deterioration in workability when mounting the driven sprocket on a flange part and increase in weight of the wheel.SOLUTION: In hubs 40 of a wheel 38 are formed flange parts 40f expanded outward in a radial direction of the hubs 40; through a driven sprocket 51 which contacts the flange parts 40f from outward in a width direction of a motor cycle and the flange parts 40f are inserted a plurality of bolts 56 from outward in the width direction; the bolts 56 are screwed with a plurality of nuts 57 which contact the flange parts 40f from inward in the width direction; and a plurality of protruding parts 40h which approximate the nuts 57 from inward along a radial direction of the hubs 40 are protruded on outer peripheries of the hubs 40 at positions corresponding to the plurality of nuts 57 respectively.SELECTED DRAWING: Figure 3 【課題】動力源からの動力を伝達する無端状のドライブチェーンが、後輪のホイールに固定されるドリブンスプロケットに巻き掛けられる自動二輪車用駆動装置において、ドリブンスプロケットをフランジ部に組み付ける際の作業性の低下およびホイールの重量増加を回避しつつ、ナットおよびハブ間へのドライブチェーンの噛み込みを防止する。【解決手段】ホイール３８のハブ４０に、該ハブ４０の半径方向外方に張り出すフランジ部４０ｆが形成され、車幅方向外方からフランジ部４０ｆに当接するドリブンスプロケット５１およびフランジ部４０ｆに、複数個のボルト５６が車幅方向外方から挿通され、フランジ部４０ｆに車幅方向内方から当接する複数個のナット５７がボルト５６にそれぞれ螺合され、ハブ４０の半径方向に沿う内方からナット５７に近接する複数個の突部４０ｈが、複数個のナット５７にそれぞれ対応した位置でハブ４０の外周に突設される。【選択図】 図３