To provide a swing mechanism for a tricycle, which excels in maneuverability by which both stability of a front frame and traveling stability during curve traveling can be achieved.SOLUTION: A tricycle comprises: a vehicle body frame 52 divided into a front frame 52 and a rear frame 54; and a swing mechanism 66 allowing relative swing of the front frame 52 and rear frame 54. The swing mechanism 66 has a plurality of swing sections respectively oriented toward an either side in a swing direction of the front frame from a vertical neutral position of the front frame 52, and also has a swing restoration device 10 that causes a reaction force relative to swing of the front frame 52. The swing restoration device 10 has: a resistance part 16 formed from a plurality of elastic bodies coupled in series; and an initial limiting device 17 that limits an operation range of one of the elastic bodies of the resistance part 16 to an initial swing section of the front frame. An initial spring constant for the resistance part 16 in the initial swing section is set smaller than a subsequent spring constant of the resistance part 16 in a subsequent swing section.SELECTED DRAWING: Figure 1
【課題】前フレームの安定性とカーブ走行時の走行安定性を共に実現できる操縦性に優れた三輪自転車のスイング機構を提供する。【解決手段】前フレーム52と後フレーム54とに分割された車体フレーム52と、前フレーム52と後フレーム54との相対的な揺動を許容する揺動機構66を備え、揺動機構66は、前フレーム52の鉛直中立位置から前フレーム揺動方向の両側方向に向けてそれぞれ複数の揺動区間を有し、かつ前フレーム52の揺動に対する反力を生じる揺動復元装置10を有し、揺動復元装置10は、直列に連結した複数の弾性体からなる抵抗部16と、抵抗部16の一つの弾性体の作動範囲を前フレームの初期揺動区間に制限する初期制限装置17を有し、初期揺動区間における抵抗部16の初期ばね定数を次期揺動区間における抵抗部16の次期ばね定数よりも小さく設定した。【選択図】図1
SWING MECHANISM FOR TRICYCLE
三輪自転車のスイング機構
2019-06-06
Patent
Electronic Resource
Japanese
IPC: | B62K Fahrräder , CYCLES |