To provide a steering dumper device for a saddle-riding type vehicle in which a pump unit is provided between a steering component and a vehicle body frame and an attenuation force adjustment mechanism is interposed between a first oil chamber and a second oil chamber, the steering dumper device being designed to avoid an increase in the axial length of the pump unit and, at the same time, to obtain satisfactory dumper performance by appropriately adjusting circulation of the dumper oil, resulting from movement of a piston.SOLUTION: A pump case 23 and a piston rod 27 disposed in a first oil chamber 24 and extending through one end of the pump case 23 so as to be liquid-tight are correspondingly provided in a vehicle body frame F and a steering component 11. A main conduit 34 between the first oil chamber 24 and a second oil chamber 25 and an auxiliary oil chamber 37 in a pressurized state are connected via flow rate adjustment means 38 configured such that a quantity of dumper oil flowing in the second oil chamber 25 when the volume of the first oil chamber 24 decreases is larger than a quantity of dumper oil flowing in the first oil chamber 24 when the volume of the second oil chamber 25 decreases.SELECTED DRAWING: Figure 3
【課題】ポンプユニットがステアリング構成要素および車体フレーム間に設けられ、減衰力調整機構がポンプユニットの第1油室および第2油室間に介設される鞍乗り型車両用ステアリングダンパ装置において、ポンプユニットが軸方向に長くなることを回避しつつ、ピストンの移動に伴うダンパオイルの流通を適切に調整して良好なダンパ性能を得る。【解決手段】第1油室24内に配置されてポンプケース23の一端部を液密に貫通するピストンロッド27およびポンプケース23が車体フレームFおよびステアリング構成要素11にそれぞれ取付けられ、第1および第2油室24,25間のメイン管路34と、加圧状態にある補助油室37とが、第1油室24の容積減少時に第2油室25に流入するダンパオイル量が第2油室25の容積減少時に第1油室24に流入するダンパオイル量よりも多くなるようにした流量調整手段38を介して接続される。【選択図】 図3
STEERING DAMPER DEVICE FOR SADDLE-RIDING TYPE VEHICLE
鞍乗り型車両用ステアリングダンパ装置
2019-04-25
Patent
Elektronische Ressource
Japanisch
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