JP7481005B2 - Tricycle - Google Patents

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JP7481005B2
JP7481005B2 JP2020195159A JP2020195159A JP7481005B2 JP 7481005 B2 JP7481005 B2 JP 7481005B2 JP 2020195159 A JP2020195159 A JP 2020195159A JP 2020195159 A JP2020195159 A JP 2020195159A JP 7481005 B2 JP7481005 B2 JP 7481005B2
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link
fixed
steering
parallel
rotatable
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JP2022083686A (en
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軍三 武田
文啓 神田
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SANGYOKIDEN CO., LTD.
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SANGYOKIDEN CO., LTD.
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Priority to JP2020195159A priority Critical patent/JP7481005B2/en
Priority to PCT/JP2020/044200 priority patent/WO2022113262A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
    • B62J45/412—Speed sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
    • B62K5/02—Tricycles
    • B62K5/05—Tricycles characterised by a single rear wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
    • B62K5/08—Cycles with handlebars, equipped with three or more main road wheels with steering devices acting on two or more wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
    • B62K5/10—Cycles with handlebars, equipped with three or more main road wheels with means for inwardly inclining the vehicle body on bends

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Cycles, And Cycles In General (AREA)

Description

本発明は、前２輪の三輪自転車に関する。 The present invention relates to a three-wheeled bicycle with two front wheels.

特許文献１には、前２輪の三輪自転車において、フレームのフレームポストと、前記フレームポストに操向回転可能に支持されているハンドル軸と、左右の前輪をそれぞれ回転可能に支持する左右ホークバーと、前記左右ホークバーを連結して平行リンクを形成する上下リンクと、前記上下リンクを前記ハンドル軸に、前記フレームポストの下方で、揺動可能に連結する連結部と、前記平行リンクと前記ハンドル軸間に設けられた左右の前輪軸間の高さ位置の変化を防止する方向に復元力を与えるばね手段と、を含む前２輪の三輪自転車が開示されている。 Patent document 1 discloses a three-wheeled bicycle with two front wheels, which includes a frame post of a frame, a handle shaft supported on the frame post so as to be steerable and rotatable, left and right hawk bars supporting the left and right front wheels so as to be rotatable, upper and lower links connecting the left and right hawk bars to form a parallel link, a connecting part connecting the upper and lower links to the handle shaft below the frame post so as to be swingable, and a spring means provided between the parallel link and the handle shaft for applying a restoring force in a direction to prevent a change in the height position between the left and right front wheel axles.

特許文献２には、車体フレームが前端に備えるハンドルポストに、操向ハンドルに連なる操向軸が回転可能に支承され、左および右前輪をそれぞれ回転自在に支持する左側および右側フロントフォークが、前記ハンドルポストの左右両側で上下に延びるように配置されて該ハンドルポストに支持される左側および右側サイドポストにそれぞれ回転可能に支承され、前記操向軸が、該操向軸の回転作動に応じて前記両前輪を転向させることを可能として前記両フロントフォークに連結され、左側および右側サイドポストに両端が連結される上リンクの中央部、ならびに上リンクよりも下方に配置されて左側および右側サイドポストに両端が連結される下リンクの中央部が、前記ハンドルポストに回転可能に連結され、車体フレームの後部に駆動輪が支持される三輪自転車において、前記左側および右側サイドポストが、上方に向かうにつれて両サイドポスト間の間隔が小さくなるように傾斜して配置された前２輪の三輪自転車が開示されている。 Patent Document 2 discloses a three-wheeled bicycle with two front wheels, in which a steering shaft connected to a steering handle is rotatably supported on a handle post provided at the front end of the body frame, left and right front forks that rotatably support the left and right front wheels, respectively, are rotatably supported on left and right side posts that are arranged to extend up and down on both the left and right sides of the handle post and supported by the handle post, the steering shaft is connected to the front forks so that the front wheels can be turned in response to the rotation of the steering shaft, and the center of an upper link, both ends of which are connected to the left and right side posts, and the center of a lower link, which is arranged below the upper link and both ends of which are connected to the left and right side posts, are rotatably connected to the handle post, and a drive wheel is supported at the rear of the body frame.

特許第４２９７９６７号公報Patent No. 4297967 特開２００２－３３７７７９号公報JP 2002-337779 A

特許文献１の発明は、ハンドルと平行リンクとを一体的に曲げる構造であるので、ハンドルを大きく切ると正面視における前２輪の左右方向の幅が大きく縮小され、３点支持の特徴が薄らぎ転倒しやすいという問題があった。 The invention in Patent Document 1 has a structure in which the handlebars and parallel links are bent as a single unit, so when the handlebars are turned sharply, the width of the front two wheels in the left-right direction when viewed from the front is greatly reduced, weakening the three-point support characteristic and making the vehicle prone to tipping over.

特許文献２の発明は、ハンドルポストに平行リンクが上下方向に揺動自在に取り付けられ、操舵軸の下端部に取り付けられたピットマンアームやナックルアームの伝達機能により前２輪を転向させる構造であるので、正面視における前２輪の左右方向の幅は広くて一定であるので、ハンドルの切れ角が浅くなり前２輪の三輪自転車を小回りさせることが難しいという問題があった。また、平行リンク、及び、ピットマンアームやナックルアームの伝達機能が前２輪の上端の高さより高い位置に取り付けているので、重心が高くなり三輪自転車が転倒しやすいという問題があった。 The invention in Patent Document 2 has a structure in which parallel links are attached to the handle post so that they can swing up and down freely, and the two front wheels are turned by the transmission function of the pitman arm and knuckle arm attached to the lower end of the steering shaft. As a result, the width of the two front wheels in the left-right direction when viewed from the front is wide and constant, which causes the steering angle to be shallow and makes it difficult to make small turns on the three-wheeled bicycle with two front wheels. In addition, because the parallel links and the transmission function of the pitman arm and knuckle arm are attached at a position higher than the height of the top ends of the two front wheels, the center of gravity is high and the three-wheeled bicycle is prone to tipping over.

本発明はこうした問題に鑑み創案されたもので、三輪自転車の自立のために、地面との３点支持の前２輪の正面視からの間隔を常時狭くしすぎず三輪自転車の転倒を防止し自立させ、かつ三輪自転車の小回りを容易にでき、さらに重心を低くできる三輪自転車を提供することを課題とする。 The present invention was devised in light of these problems, and its objective is to provide a three-wheeled bicycle that can stand on its own without constantly narrowing the distance between the two front wheels, which are supported at three points on the ground when viewed from the front, so that the three-wheeled bicycle can stand on its own without tipping over, can easily maneuver, and has a lower center of gravity.

請求項１に記載の三輪自転車は、前２輪を備えた三輪自転車であって、上端部をハンドルの中央部に固定し、筒状ハンドルフレーム体内に回転自在に挿通させたハンドル軸と、上端部を前記ハンドル軸の下端部に固定して垂設させた、下端部の内周壁部に内歯が形成された略筒状体の操舵筒状体と、前記操舵筒状体の前側に固定され、前方に上下で２つのピンを突設させた平行リンク支承部と、前記平行リンク支承部に上下方向に回転可能に支承され、左右方向は前記平行リンク支承部と一体的に回転可能に取り付けられた上リンク及び下リンク、前記上リンク及び前記下リンクの右端部とそれぞれ上下方向に回転可能に連結され、右側の前輪の車輪軸を固定した右リンク、並びに、前記上リンク及び前記下リンクの左端部とそれぞれ上下方向に回転可能に連結され、左側の前輪の車輪軸を固定した左リンクを備えた平行リンクと、上端部を前記ハンドルフレーム体の外周壁部に固定させて垂設させた２本の板状部、及び、前記２本の板状部の下端に架設した平板部を有する略コ字状の底部支持体と、前記底部支持体の平板部に設けた孔に挿通させたピンの上端部に回転中心部を固定し、かつ前記平板部の上面側に配設した、前記操舵筒状体の内歯に噛み合う外歯平歯車と、前記平板部の下方に突出した前記ピンの下端部に一端側を固定した駆動リンク、前記左リンクに一端側を固定した左従動リンク、前記右リンクに一端側を固定した右従動リンク、並びに、前記駆動リンクと一端側を左右方向に回転可能に連結し他端側を前記右従動リンク又は左従動リンクと左右方向に回転可能に連結した２つの連結棒を備えた操舵リンクと、を備え、前記前２輪が、前記ハンドル軸と一体的に左右方向に回転可能に連結された前記平行リンクによる曲がり角度と、前記ハンドル軸とは前記外歯平歯車と前記内歯とのギア比によって異なる回転角度をする前記操舵リンクによる曲がり角度とを加えた曲がり角度で曲がることを特徴とする。 The three-wheeled bicycle described in claim 1 is a three-wheeled bicycle with two front wheels, comprising a handle shaft whose upper end is fixed to the center of the handle and rotatably inserted into a cylindrical handle frame body, a steering cylinder-shaped body of an approximately cylindrical body with internal teeth formed on the inner peripheral wall of the lower end, whose upper end is fixed to the lower end of the handle shaft and vertically installed, a parallel link support part fixed to the front side of the steering cylinder-shaped body and having two pins protruding forward, one above the other, an upper link and a lower link that are rotatably supported in the vertical direction on the parallel link support part and are attached so as to be rotatable integrally with the parallel link support part in the left-right direction, a right link that is rotatably connected to the right end of the upper link and the lower link, respectively, in the vertical direction, and has a wheel axle of a right front wheel fixed thereto, and a left link that is rotatably connected to the left end of the upper link and the lower link, respectively, in the vertical direction, and has a wheel axle of a left front wheel fixed thereto, and two plate-shaped parts whose upper ends are fixed to the outer peripheral wall of the handle frame body and vertically installed. A bottom support body having a generally U-shaped flat plate portion bridged on the lower ends of the two plate portions, an externally toothed spur gear having a rotation center fixed to the upper end of a pin inserted into a hole provided in the flat plate portion of the bottom support body and disposed on the upper surface side of the flat plate portion, which meshes with the internal teeth of the steering cylinder-shaped body, a drive link having one end fixed to the lower end of the pin protruding downward from the flat plate portion, a left driven link having one end fixed to the left link, a right driven link having one end fixed to the right link, and the drive link. and a steering link with two connecting rods, one end of which is connected to the right driven link and the other end of which is connected to the right driven link or the left driven link and is rotatable in the left and right directions, and the two front wheels turn at a turning angle that is the sum of the turning angle of the parallel link that is connected to the handle shaft and rotatable in the left and right directions, and the turning angle of the steering link that rotates at a different angle with respect to the handle shaft depending on the gear ratio between the external spur gear and the internal gear.

請求項２に記載の三輪自転車は、請求項１において、前記外歯平歯車と前記内歯とのギア比を変えることによって、及び／又は、前記駆動リンクの長さを変えることによって、前記ハンドル軸を曲げる角度に対する前輪の曲がる角度の深を調整可能とすることを特徴とする。 The three-wheeled bicycle described in claim 2 is characterized in that, in claim 1, the depth of the turning angle of the front wheel relative to the turning angle of the handle shaft can be adjusted by changing the gear ratio between the external spur gear and the internal gear and/or by changing the length of the drive link.

請求項３に記載の三輪自転車は、請求項１又は２において、前記平行リンクの姿勢を維持可能な平行リンクロック手段であって、前記平行リンクロック手段が、前記上リンクに固定した略半円盤状体と、前記操舵筒状体の前側に固定した、前記略半円盤状体を挟持可能な把持部と、３輪のうちのいずれかの車輪の回転速度を測定する速度測定手段と、制御部と、を備え、前記制御部が、前記速度測定手段からの速度が予め設定した速度以下のときに前記把持部が前記略半円盤状体を挟持し前記平行リンクの姿勢をロックし、前記速度が予め設定した速度超のときに前記把持部をロック解除させ前記平行リンクを上下方向に回転自在とする制御をすることを特徴とする。 The three-wheeled bicycle of claim 3 is a parallel link locking means capable of maintaining the posture of the parallel links in claim 1 or 2, the parallel link locking means comprising an approximately semi-disc-shaped body fixed to the upper link, a gripping portion fixed to the front side of the steering cylinder-shaped body and capable of clamping the approximately semi-disc-shaped body, a speed measuring means for measuring the rotational speed of any of the three wheels, and a control unit, wherein the control unit controls the gripping portion to clamp the approximately semi- disc-shaped body and lock the posture of the parallel links when the speed from the speed measuring means is equal to or lower than a preset speed, and to unlock the gripping portion and allow the parallel links to rotate freely in the vertical direction when the speed exceeds the preset speed.

請求項１に記載の発明は、前２輪を、ハンドル軸と一体的に回転可能に連結された平行リンクによる曲がり角度と、前記ハンドル軸とは外歯平歯車と内歯とのギア比によって異なる回転角度をする操舵リンクによる曲がり角度とを加えた曲がり角度で曲がることができる。すなわち、ハンドルの切り角度より前２輪の曲がり角度を大きくすることができるので、ハンドルの切れを向上させることができ、小回りができる。このため、例えば駐輪時に容易に三輪自転車を操作することができ狙った範囲に容易に駐輪させることができる。また、正面視からの前２輪の左右間の間隔を、ハンドルの切れ角度と同じ角度で曲がる形態の三輪自転車に比較して広くできるので、三輪自転車としての特徴である転倒しにくいという安定性を保持できる。 The invention described in claim 1 allows the two front wheels to turn at an angle that is the sum of the turning angle of the parallel links that are rotatably connected to the handle shaft and the turning angle of the steering link that rotates at a different angle from the handle shaft depending on the gear ratio between the external spur gear and the internal gear. In other words, the turning angle of the two front wheels can be made larger than the steering angle, improving the steering and allowing for tighter turning. This makes it easy to operate the three-wheeled bicycle when parking, for example, and to park it in the desired range. In addition, the distance between the left and right of the two front wheels when viewed from the front can be made wider compared to a three-wheeled bicycle that turns at the same angle as the steering angle, so the stability of a three-wheeled bicycle that is less likely to tip over can be maintained.

また、斜面におけるバンク走行、段差又は障害物がある路面の走行等、前２輪の左右の高さが異なる路面を走行するときに、前２輪が傾いてもハンドル軸を垂直方向に維持できるので、直進安定性に優れ、三輪自転車をこぐ人の身体の姿勢を平面状の路面同じように垂直方向で維持できるという効果を奏する。 In addition, when riding on a sloped bank, or on a road surface with steps or obstacles, where the left and right sides of the front two wheels are at different heights, the handlebar axis can be maintained vertically even if the front two wheels are tilted, resulting in excellent straight-line stability and the effect of allowing the body posture of the person pedaling the tricycle to be maintained vertically in the same way as on a flat road surface.

また、曲がるときには、二輪自転車と同じように前２輪もハンドル軸と同一方向に同時に傾けるバンク走行ができるので、二輪自転車運転感覚で容易に旋回できるという効果を奏する。 In addition, when turning, the two front wheels can be banked in the same direction as the handlebar axis, just like on a two-wheeled bicycle, making it easy to turn in the same way as if you were driving a two-wheeled bicycle.

また、平行リンク及び操舵リンクの取付位置を前２輪の高さ以内に低く抑えているので重心を低くできることから、走行安定性に優れるという効果を奏する。 In addition, the mounting positions of the parallel link and steering link are kept low, within the height of the two front wheels, allowing the center of gravity to be lowered, resulting in excellent driving stability.

請求項２の発明は、操作筒状体の内歯と、操舵リンク7に連結した外歯平歯車とのギア比を変えることによって、ハンドルの切り角度と前２輪の曲がり角度との比率を可変できる。よって、好みのハンドルの切れを実現させることができる。 The invention of claim 2 allows the ratio between the steering angle and the turning angle of the two front wheels to be changed by changing the gear ratio between the internal teeth of the operating cylinder and the external spur gear connected to the steering link 7. This allows the steering angle to be adjusted to suit your needs.

請求項３の発明は、例えば５ｋｍ／Ｈ以下の低速で三輪自転車を運転するときは平行リンクの傾斜が大きくなって前２輪が傾くと三輪自転車が不安定状態になるという問題を解消させるため、予め定めた速度以下のときには平行リンクの動きをロックさせ車体を垂直方向に維持、固定させることによって、こぐ人が地面から足を離しても三輪自転車が自立するため、三輪自転車の走行し始める時の走行不安定状態を解消させ直進安定性が増し、安定して運転できる状態にすることができるという効果を奏する。 The invention of claim 3 solves the problem that when a tricycle is ridden at low speeds, for example at 5km/h or less, the inclination of the parallel links becomes large and the front two wheels tilt, causing the tricycle to become unstable. When the speed is below a predetermined value, the movement of the parallel links is locked to maintain and fix the body in a vertical position, so that the tricycle can stand on its own even if the pedaler takes his feet off the ground. This solves the unstable state of the tricycle when it starts to move, increases its straight-line stability, and enables it to be ridden stably.

本発明の三輪自転車の１例の平面概要図である。1 is a schematic plan view of an example of a three-wheeled bicycle of the present invention; 本発明の三輪自転車の１例の右側面概要図である。1 is a schematic right side view of an example of a three-wheeled bicycle of the present invention. FIG. 図１のハンドル軸下方のＡ―Ａ断面の操舵リンク関連の説明図である。2 is an explanatory diagram of a steering link and related parts taken along the line AA in FIG. 1 below the handle shaft. 図３のＢ－Ｂ断面の操舵リンクの説明図である。FIG. 4 is an explanatory diagram of a steering link taken along the line BB in FIG. 3 . 図１における正面視からの平行リンクの１例の概要説明図である。FIG. 2 is a schematic explanatory diagram of an example of a parallel link in FIG. 1 as viewed from the front; ハンドルを真っ直ぐにしたときにおける、操舵リンクを水平方向で断面を切ったときの平面視の概要説明図である。1 is a schematic explanatory diagram showing a plan view of a steering link when the steering wheel is straightened and the cross section is taken in the horizontal direction; FIG. ハンドルを左に切ったときにおける、操舵リンクを水平方向で断面を切ったときの平面視の概要説明図である。1 is a schematic explanatory diagram of a plan view of a steering link taken in cross section in the horizontal direction when the steering wheel is turned to the left; FIG. 左リンク周辺の構成説明図で図６におけるＤ部の拡大説明図である。FIG. 7 is an explanatory diagram of the configuration around the left link, and is an enlarged explanatory diagram of a portion D in FIG. 6 . 左リンク周辺の構成説明図で図５におけるＣ部の右側面図である。FIG. 6 is a right side view of part C in FIG. 5 for explaining the configuration of the left link and its periphery. 左リンク下部周辺の構成説明図で図５におけるＣ部の左側面図である。FIG. 6 is a left side view of part C in FIG. 5 for explaining the configuration of the lower part of the left link and its surroundings. 左リンク下部周辺の構成説明図で図９におけるＬ―Ｌ断面図である。10 is a cross-sectional view taken along the line L-L in FIG. 9, illustrating the configuration of the periphery of the lower part of the left link. 左リンク下部と下リンクとの連結部周辺の構成説明図で図９におけるＨ部のＥ－Ｅ断面図である。10 is an explanatory diagram of the configuration of the periphery of the connection portion between the lower part of the left link and the lower link, and is an E-E cross-sectional view of part H in FIG. 9. 左リンク下部と下リンクとの連結部周辺の構成説明図で図９におけるＨ部のＦ－Ｆ断面図である。10 is an explanatory diagram of the configuration of the periphery of the connection portion between the lower part of the left link and the lower link, and is an F-F cross-sectional view of part H in FIG. 9. 左リンク下部と下リンクとの連結部周辺の、図９におけるＨ部の構成説明図で、（ａ）は図１２におけるＪ－Ｊ断面図であり、（ｂ）は図５におけるＫ矢視図である。12A is a cross-sectional view taken along the line J--J in FIG. 12, and FIG. 12B is a view taken along the line K in FIG. 5. FIG. 本発明のハンドルの切れ角度と前輪の曲がり角度の説明模式図で、（ａ）はハンドルの切れ角度０度の状態図の説明模式図で、（ｂ）はハンドルを左に２０度切ったときの状態の説明模式図である。1A is a schematic diagram illustrating the state when the steering angle is 0 degrees and the front wheel turning angle of the present invention, and FIG. 1B is a schematic diagram illustrating the state when the steering angle is turned 20 degrees to the left. 三輪自転車の正面視における平行リンクの説明図で、（ａ）平坦な路面を走行中の三輪自転車の状態の説明図であり、（ｂ）は段差のある路面を走行中の三輪自転車の状態の説明図であり、（ｃ）は曲がるときの三輪自転車の状態の説明図である。FIG. 1 is an explanatory diagram of parallel links of a three-wheeled bicycle viewed from the front, in which (a) is an explanatory diagram of the state of the three-wheeled bicycle when traveling on a flat road surface, (b) is an explanatory diagram of the state of the three-wheeled bicycle when traveling on a road surface with bumps, and (c) is an explanatory diagram of the state of the three-wheeled bicycle when turning. 三輪自転車のハンドルの切れ角度と前輪の曲がり角度の説明模式図で、（ａ）は本発明の三輪自転車のハンドルの切れ角度０度の状態図の説明模式図で、（ｂ）は前２輪の車軸とハンドルが固定され本発明の操舵リンクを備えていない形態の場合のハンドルを５０℃切ったときの説明模式図で、（ｃ）は前２輪の車軸とハンドルが固定され本発明の操舵リンクを備えていない形態の場合のハンドルを２０度切ったときの説明模式図で、（ｄ）は本発明の三輪自転車のハンドルを２０度切ったときの説明模式である。FIG. 1 is a schematic diagram explaining the turning angle of the handlebars of a three-wheeled bicycle and the turning angle of the front wheel; (a) is a schematic diagram explaining the state diagram of the three-wheeled bicycle of the present invention when the handlebars are turned at 0 degrees, (b) is a schematic diagram explaining the state diagram of the three-wheeled bicycle of the present invention when the handlebars are turned at 50 degrees in a configuration in which the axles of the front two wheels and the handlebars are fixed and the steering link of the present invention is not provided, (c) is a schematic diagram explaining the state diagram of the handlebars when the axles of the front wheels and the handlebars are fixed and the steering link of the present invention is not provided, and (d) is a schematic diagram explaining the state diagram of the three-wheeled bicycle of the present invention when the handlebars are turned at 20 degrees.

本発明である三輪自転車１は前２輪の三輪自転車であり、本発明の三輪自転車１には電動アシスト自転車、一般用自転車又は電動自転車が含まれる。 The three-wheeled bicycle 1 of the present invention is a three-wheeled bicycle with two front wheels, and the three-wheeled bicycle 1 of the present invention includes an electrically assisted bicycle, a general bicycle, or an electric bicycle.

前記三輪自転車１は、図１～図６に示すように、前２輪を備えた三輪自転車１であって、上端部をハンドル６４の中央部に固定し、筒状のハンドルフレーム体６内に回転自在に挿通させたハンドル軸５と、上端部を前記ハンドル軸５の下端部に固定して垂設させた、下端部の内周壁部に内歯３０が形成された略筒状体の操舵筒状体７と、前記操舵筒状体７の前側に固定され、前方に上下で２つのピン４１ａ、４１ｂを突設させた平行リンク支承部８と、図３や図５に示すように前記平行リンク支承部８に上下方向に回転可能に支承され、左右方向は前記平行リンク支承部８と一体的に回転可能に取り付けられた上リンク１１及び下リンク１２、前記上リンク１１及び前記下リンク１２の右端部とそれぞれ上下方向に回転可能に連結され、右側の前輪６１の車輪軸６６を固定した右リンク１３、並びに、前記上リンク１１及び前記下リンク１２の左端部とそれぞれ上下方向に回転可能に連結され、左側の前輪６２の車輪軸６６を固定した左リンク１４を備えた平行リンク２と、図３や図４に示すように上端部を前記ハンドルフレーム体６の外周壁部に固定させて垂設させた２本の板状部９ａ、及び、前記２本の板状部９ａの下端に架設した平板部９ｂを有する略コ字状の底部支持体９と、前記底部支持体９の平板部９ｂに設けた孔に挿通させたピン５１の上端部に回転中心部を固定し、かつ前記平板部９ｂの上面側に配設した、前記操舵筒状体７の内歯３０に噛み合う外歯平歯車４０と、図３や図６に示すように前記平板部９ｂの下方に突出した前記ピン５１の下端部に一端側を固定した駆動リンク２１、前記左リンク１４に一端側を固定した左従動リンク２３ｂ、前記右リンク１３に一端側を固定した右従動リンク２３ａ、並びに、前記駆動リンク２１と一端側を左右方向に回転可能に連結し他端側を前記右従動リンク２３ａ又は左従動リンク２３ｂと左右方向に回転可能に連結した２つの連結棒２４を備えた操舵リンク３と、を備え、図１７（ｄ）に示すように前記前２輪６１、６２が、前記ハンドル軸５と一体的に左右方向に回転可能に連結された前記平行リンク２による曲がり角度θ１と、前記ハンドル軸５とは前記外歯平歯車４０と前記内歯３０とのギア比によって異なる回転角度をする前記操舵リンク３による曲がり角度θ２とを加えた曲がり角度θ３で曲がる三輪自転車１である。 As shown in Figures 1 to 6, the three-wheeled bicycle 1 is a three-wheeled bicycle 1 with two front wheels, and includes a handle shaft 5 whose upper end is fixed to the center of the handle 64 and inserted rotatably into a cylindrical handle frame body 6, a steering cylinder-shaped body 7 whose upper end is fixed to the lower end of the handle shaft 5 and vertically arranged, and whose inner peripheral wall portion of the lower end is formed with internal teeth 30, a parallel link support part 8 fixed to the front side of the steering cylinder-shaped body 7 and having two pins 41a, 41b protruding upward and downward from the front, and a parallel link support part 8 which is supported so as to be rotatable in the vertical direction and in the left-right direction as shown in Figures 3 and 5. a parallel link 2 including an upper link 11 and a lower link 12 attached rotatably integrally with the parallel link support portion 8, a right link 13 connected rotatably in the vertical direction to right ends of the upper link 11 and the lower link 12, respectively, and having a wheel axle 66 of a right front wheel 61 fixed thereto, and a left link 14 connected rotatably in the vertical direction to left ends of the upper link 11 and the lower link 12, respectively, and having a wheel axle 66 of a left front wheel 62 fixed thereto; and two plate-like portions 9a having upper ends fixed to an outer circumferential wall portion of the handle frame body 6 as shown in Figures 3 and 4, and The bottom support 9 is substantially U-shaped and has a flat plate portion 9b that is spanned between the lower ends of the two plate-like portions 9a, an externally toothed spur gear 40 that has a rotation center fixed to the upper end of a pin 51 that is inserted into a hole in the flat plate portion 9b of the bottom support 9 and is disposed on the upper surface side of the flat plate portion 9b and engages with the internal teeth 30 of the steering cylinder body 7, and a driving link 21 that has one end fixed to the lower end of the pin 51 that protrudes downward from the flat plate portion 9b as shown in Figures 3 and 6, a left driven link 23b that has one end fixed to the left link 14, a right driven link 23a that has one end fixed to the right link 13, and the driving link 21. The three-wheeled bicycle 1 has a steering link 3 with two connecting rods 24, one end of which is connected to the right driven link 23a or the left driven link 23b so that it can rotate in the left-right direction, and the other end of which is connected to the right driven link 23a or the left driven link 23b so that it can rotate in the left-right direction. As shown in FIG. 17(d), the two front wheels 61, 62 turn at a turning angle θ3, which is the sum of the turning angle θ1 made by the parallel link 2, which is connected to the handle shaft 5 so that it can rotate in the left-right direction as one unit, and the turning angle θ2 made by the steering link 3, which has a different turning angle with respect to the handle shaft 5 depending on the gear ratio between the external spur gear 40 and the internal gear 30.

本発明の三輪自転車１は、図１又は図２に示すように、ハンドル６４、サドル６７、左右に配設した２つの前輪６１、６２、後輪６３、フレーム体４、ハンドル軸５、ハンドルフレーム体６等を備え、さらに平行リンク２及び操舵リンク３を備える。 As shown in FIG. 1 or FIG. 2, the three-wheeled bicycle 1 of the present invention is equipped with a handlebar 64, a saddle 67, two front wheels 61, 62 arranged on the left and right, a rear wheel 63, a frame body 4, a handlebar shaft 5, a handlebar frame body 6, etc., and further equipped with a parallel link 2 and a steering link 3.

前記ハンドルフレーム体６は、図３に示すように前記ハンドル軸５を挿通させ、前記ハンドル軸５はベアリング４２を介して回転可能にしている。そして前記ハンドルフレーム体６は、図２に示すように、前２輪６１、６２から後１輪６３までの、略車輪の高さで極めて低い高さで略水平方向に直線状にしているフレーム体４に固定させるように連結させている。このようにハンドル６４とペダル６９の間のフレーム体４を低くすることは、跨ぐために足を高く上げることが難しい高齢者などの自転車の運転者によって足をほとんど上げなくても左右にペダル６９に足を楽に載せることができる。なお、本発明の三輪自転車１としては、図２に示すような形態のフレーム体４に限らない。 The handle frame body 6 has the handle shaft 5 inserted therethrough as shown in FIG. 3, and the handle shaft 5 is rotatable via a bearing 42. The handle frame body 6 is fixedly connected to the frame body 4, which is linear and approximately horizontally from the two front wheels 61, 62 to the single rear wheel 63 as shown in FIG. 2. Lowering the frame body 4 between the handle 64 and the pedals 69 in this way allows bicycle riders, such as elderly people who have difficulty raising their feet high to straddle the bicycle, to easily place their feet on the pedals 69 on the left and right sides without having to lift their feet very much. Note that the three-wheeled bicycle 1 of the present invention is not limited to the frame body 4 in the form shown in FIG. 2.

前記ハンドル軸５は、図１又は図２に示すように上端部をハンドル６４の中央部に固定し、図３に示すように筒状のハンドルフレーム体６内に回転自在に挿通させ、下端部に操舵筒状体７を軸心が一直線状になるように固定させている。これにより、ハンドル６４を切ればハンドル軸５が回転し、該ハンドル軸５と一体的に該操舵筒状体７が回転する。 The upper end of the handle shaft 5 is fixed to the center of the handle 64 as shown in Fig. 1 or 2, and is rotatably inserted into the cylindrical handle frame body 6 as shown in Fig. 3. The steering cylinder body 7 is fixed to the lower end so that the axis of the steering cylinder body 7 is in a straight line. As a result, when the handle 64 is turned, the handle shaft 5 rotates, and the steering cylinder body 7 rotates integrally with the handle shaft 5.

前記操舵筒状体７は、図３に示すように、上端部を前記ハンドル軸５の下端部に、該ハンドル軸５の軸心と軸心が一直線状になるように連結させて固定し、下端部の内周壁部に内歯３０が形成され、前側に平行リンク支承部８を取付けている。前記操舵筒状体７と前記平行リンク支承部８は一体化されている。該平行リンク支承部８は、前面に上下方向で離隔させて２本のピン４１ａ、４１ｂを突出させており、上側の該ピン４１ａに上リンク１１を上下方向に回転自在に支承させ、下側の該ピン４１ｂに下部部リンク１２を上下方向に回転自在に支承させている。また、上リンク１１及び下リンク１２は、前記平行リンク支承部８に左右方向には一体的に回転可能に取り付けられている。 As shown in FIG. 3, the upper end of the steering cylinder 7 is connected and fixed to the lower end of the steering shaft 5 so that the axis of the steering shaft 5 is aligned with the axis of the steering shaft 5, and internal teeth 30 are formed on the inner peripheral wall of the lower end, and a parallel link support part 8 is attached to the front side. The steering cylinder 7 and the parallel link support part 8 are integrated. The parallel link support part 8 has two pins 41a, 41b protruding from the front side at a distance in the vertical direction, and the upper link 11 is supported by the upper pin 41a so as to be rotatable in the vertical direction, and the lower link 12 is supported by the lower pin 41b so as to be rotatable in the vertical direction. The upper link 11 and the lower link 12 are attached to the parallel link support part 8 so as to be rotatable together in the left-right direction.

また、前記操舵筒状体７は、図３に示すように、下端を底部支持体９の平板部９ｂの上面に当接又は微小の隙間を設けて配設している。 As shown in FIG. 3, the steering cylinder 7 is disposed so that its lower end abuts against the upper surface of the flat plate portion 9b of the bottom support 9 or with a small gap therebetween.

前記底部支持体９は、図２～図４に示すように、上端部を前記ハンドルフレーム体６の外周壁部に固定させて垂設させた２本の板状部９ａ、及び、前記２本の板状部９ａの下端に架設した平板部９ｂを有する略コ字状の形態を有する。そして、左右で２本の長板状部９ａの上端側を前記ハンドルフレーム体６の外周壁部に締結手段で固定させている。 As shown in Figures 2 to 4, the bottom support 9 has a roughly U-shaped configuration with two plate-shaped sections 9a that are fixed at their upper ends to the outer peripheral wall of the handle frame body 6 and a flat plate section 9b that is suspended from the lower ends of the two plate-shaped sections 9a. The upper ends of the two long plate-shaped sections 9a on the left and right are fixed to the outer peripheral wall of the handle frame body 6 by fastening means.

前記左右で２本の長板状部９ａの上端部は前記ハンドルフレーム体６の外周壁面に締結手段で固定しているので、前記底部支持体９はハンドル６４を切っても回転しないようにしている。そして、図３に示すように、前記平板部９ｂには上下方向で貫通孔が設けられており、該貫通孔にピン５１を回転自在に挿通させている。 The upper ends of the two long plate-shaped parts 9a on the left and right are fixed to the outer wall surface of the handle frame body 6 by fastening means, so that the bottom support 9 does not rotate even when the handle 64 is turned. As shown in Figure 3, the flat plate part 9b has a through hole in the vertical direction, and a pin 51 is inserted through the through hole so as to be freely rotatable.

前記ピン５１の上端側は前記平板部９ｂの上方に突出させ外歯平歯車４０とキー等で固定され、下端側は前記平板部９ｂの下方に突出させ駆動リンク２１とキー等で固定させている。よって、前記操舵筒状体７に螺刻した前記内歯３０が回転すれば噛み合った前記外歯平歯車４０が内歯３０と外歯平歯車４０のギア比による回転角度で回転し前記駆動リンク２１も前記外歯平歯車４０に同期して回転する。なお、ハンドル６４の切れ過ぎを規制するために、前記駆動リンク２１の回転角度を規制する回転角度規制手段（図示なし）を設けてもよい。 The upper end of the pin 51 protrudes above the flat plate portion 9b and is fixed to the external spur gear 40 with a key or the like, and the lower end protrudes below the flat plate portion 9b and is fixed to the drive link 21 with a key or the like. Therefore, when the internal teeth 30 threaded into the steering cylinder 7 rotates, the meshed external spur gear 40 rotates at a rotation angle determined by the gear ratio between the internal teeth 30 and the external spur gear 40, and the drive link 21 also rotates in synchronization with the external spur gear 40. In addition, a rotation angle regulating means (not shown) for regulating the rotation angle of the drive link 21 may be provided to regulate excessive turning of the handle 64.

前記外歯平歯車４０は、前記底部支持体９の平板部９ｂに設けた孔に挿通させたピン５１の上端側に回転中心部を固定し、かつ前記平板部９ｂの上面側に配設した、前記操舵筒状体７の内歯３０に噛み合うように配設している。よって、前記ハンドル６４を切ればハンドル軸５が回転し、該ハンドル軸５と一体的に該操舵筒状体７が回転し、前記操舵筒状体７に形成した内歯３０と噛み合う外歯平歯車４０が回転し、前記外歯平歯車４０とピン５１を介して一体的に回転するように連結された前記駆動リンク２１が回転する。 The external spur gear 40 has a rotation center fixed to the upper end side of a pin 51 inserted through a hole provided in the flat plate portion 9b of the bottom support 9, and is arranged so as to mesh with the internal teeth 30 of the steering cylinder body 7 arranged on the upper surface side of the flat plate portion 9b. Therefore, when the handle 64 is turned, the handle shaft 5 rotates, the steering cylinder body 7 rotates integrally with the handle shaft 5, the external spur gear 40 that meshes with the internal teeth 30 formed on the steering cylinder body 7 rotates, and the drive link 21 connected to the external spur gear 40 via the pin 51 so as to rotate integrally with it rotates.

ここで、前記内歯３０と前記外歯平歯車４０とのギア比が、例えば３：２とすると前記内歯３０が２０度回転する間に前記外歯平歯車は３０度回転することになり、ハンドル６４の切れ角度に対して前記駆動リンク２１は３０度回転するので、ハンドル６４の切れがよくなる。 If the gear ratio between the internal teeth 30 and the external spur gear 40 is, for example, 3:2, the external spur gear rotates 30 degrees while the internal teeth 30 rotates 20 degrees, and the drive link 21 rotates 30 degrees relative to the turning angle of the handle 64, improving the turning angle of the handle 64.

また、前記外歯平歯車と前記内歯とのギア比を変えることによって、及び／又は、前記駆動リンクの長さを変えることによって、前記ハンドル軸を曲げる角度に対する前輪の曲がる角度の深を調整可能とすることができる。 Furthermore, by changing the gear ratio between the external spur gear and the internal gear and/or by changing the length of the drive link, it is possible to adjust the depth of the turning angle of the front wheel relative to the angle at which the handle shaft is turned.

次に、前記平行リンク２について説明する。前記平行リンク２は、図５に示すように、前記平行リンク支承部８に上下方向に回転可能に支承された上リンク１１及び下リンク１２、前記上リンク１１及び前記下リンク１２の右端部とそれぞれ上下方向に回転可能に連結され、右側の前輪６１の車輪軸６６の一端部を固定した右リンク１３、並びに、前記上リンク１１及び前記下リンク１２の左端部とそれぞれ上下方向に回転可能に連結され、左側の前輪６２の車輪軸６６の一端部を固定した左リンク１４を備えている。 Next, the parallel link 2 will be described. As shown in FIG. 5, the parallel link 2 includes an upper link 11 and a lower link 12 supported by the parallel link support 8 so as to be rotatable in the vertical direction, a right link 13 connected to the right ends of the upper link 11 and the lower link 12 so as to be rotatable in the vertical direction and to which one end of the wheel axle 66 of the right front wheel 61 is fixed, and a left link 14 connected to the left ends of the upper link 11 and the lower link 12 so as to be rotatable in the vertical direction and to which one end of the wheel axle 66 of the left front wheel 62 is fixed.

上リンク１１は、該上リンク１１の略中央部に設けた貫通孔に、前記平行リンク支承部８に突設された上側のピン４１ａを挿通させて上下方向に回転自在に支承させている。そして、上リンク１１の両端部は、下リンク１２と同じ構造であり、図１３、図１４に示すように、四角形の軸受プレート３５を前後方向から挟むようにしてボルトナット等の締結手段６９により固定して、２つの前記軸受プレート３５に設けた貫通孔に支点軸５０の軸を挿通させる構成としている。 The upper link 11 is supported so as to be rotatable in the vertical direction by inserting the upper pin 41a protruding from the parallel link support portion 8 into a through hole provided in the approximate center of the upper link 11. Both ends of the upper link 11 have the same structure as the lower link 12, and as shown in Figures 13 and 14, the square bearing plates 35 are sandwiched from the front and rear and fixed with fastening means 69 such as bolts and nuts, and the shaft of the fulcrum shaft 50 is inserted into the through holes provided in the two bearing plates 35.

次に、下リンク１２は、図１３、図１４に示すように、下リンク１２の両端部は上リンク１１と同じように四角形の軸受プレート３５を前後方向から挟むようにしてボルトナット等の締結手段６９で固定して、２つの前記軸受プレート３５に設けた貫通孔に支点軸５０の軸を挿通させる構成としている。また、中央部には前後方向に貫通孔を設けて、前記平行リンク支承部８に突設された下側のピン４１ｂを挿通させて上下方向に回転自在に支承させている。 As shown in Figures 13 and 14, both ends of the lower link 12 are fixed with fastening means 69 such as bolts and nuts so as to sandwich the rectangular bearing plates 35 from the front and rear in the same manner as the upper link 11, and the shaft of the fulcrum shaft 50 is inserted through the through holes provided in the two bearing plates 35. Also, a through hole is provided in the center in the front and rear direction, and the lower pin 41b protruding from the parallel link support part 8 is inserted through the through hole to support the link so as to be rotatable in the vertical direction.

次に、左リンク１４について説明する。右リンク１３と左リンク１４とは前記平行リンク支承部８のピン４１ａとピン４１ｂを結ぶ線を中心として左右対称の形成をしている。前記左リンク１４は、図９に示すように、前記上リンク１１と上下方向に回転可能に連結されたリンク用ロッド体１５ａと、前記下リンク１２と上下方向に回転可能に連結されたリンク用ロッド体１５ｂと、前記リンク用ロッド体１５ｂと底壁部５５とを該底壁部５５内部に設けたベアリング軸受（図示なし）により左右方向に回転可能に連結させ、前記リンク用ロッド体１５ａと天壁部５７とを該天壁部５７内部に設けたベアリング軸受（図示なし）により左右方向に回転可能に連結させ、図８～図１０に示すように３面からなる外周壁部５６の前輪６２側の面に前輪６２の車輪軸６６の一端部を固設し、かつ図１０に示すように外周壁部５６の後方側の面に左従動リンク２３ｂの一端部を固設した５面を有する略箱状体の操舵用回転体１６とを備える。なお、右リンク１３に関する構成も前記左リンク１４に関する構成と左右対称で同じ構成である。 Next, we will explain the left link 14. The right link 13 and the left link 14 are formed symmetrically with respect to the line connecting the pins 41a and 41b of the parallel link support portion 8. As shown in FIG. 9, the left link 14 includes a link rod body 15a connected to the upper link 11 so as to be rotatable in the vertical direction, a link rod body 15b connected to the lower link 12 so as to be rotatable in the vertical direction, a link rod body 15b connected to the bottom wall portion 55 so as to be rotatable in the left-right direction by a bearing (not shown) provided inside the bottom wall portion 55, a link rod body 15a connected to the top wall portion 57 so as to be rotatable in the left-right direction by a bearing (not shown) provided inside the top wall portion 57, and a steering rotor 16 having a box shape and five sides, in which one end of the wheel shaft 66 of the front wheel 62 is fixed to the surface of the outer peripheral wall portion 56 on the front wheel 62 side as shown in FIG. 10, and one end of the left driven link 23b is fixed to the rear surface of the outer peripheral wall portion 56 as shown in FIG. The configuration of the right link 13 is symmetrical to the configuration of the left link 14 and has the same configuration.

前記リンク用ロッド体１５ａ、１５ｂは、図９、図１０、図１２、図１４（ａ）、（ｂ）に示すように、前記操舵用回転体１６の上側と下側にそれぞれ配設され、前記リンク用ロッド体１５ａの上端部、又は、前記リンク用ロッド体１５ｂの下端部をそれぞれ、前記上リンク１１又は前記下リンク１２のそれぞれの両端部に締結手段６９で固定した２つの前記軸受プレート３５に設けた貫通孔に嵌通させた前後方向の支点軸５０に設けた有底孔に嵌設状態にしている。 As shown in Figures 9, 10, 12, 14(a) and 14(b), the link rod bodies 15a and 15b are disposed on the upper and lower sides of the steering rotor 16, respectively, and the upper end of the link rod body 15a or the lower end of the link rod body 15b is fitted into a bottomed hole in the fore-and-aft fulcrum shaft 50, which is fitted into a through hole in the two bearing plates 35 fixed to both ends of the upper link 11 or the lower link 12 by fastening means 69.

そして、前記操舵用回転体１６は、図８、図９又は図１０に示すように、前面、後面及び外側の側面の３面を有する外周壁部５６と、天壁部５７及び底壁部５５の５面を有し、天壁部５７及び底壁部５５には前記リンク用ロッド体１５ａ又は１５ｂの端部とベアリング軸受で左右方向に回転可能に取付られている。これにより、前記操舵用回転体１６は、左従動リンク２３ａ又は右従動リンク２３ｂの左右方向Ｘの回転に一体的に回転でき、前記リンク用ロッド体１５ａ及び１５ｂ並びに前記操舵用回転体１６は、前記下リンク１２及び上リンク１１の傾斜により図９に示すように軸受プレート３５と支点軸５０との上下方向Ｓに回転可能により上下方向Ｓに移動することができる。前記操舵用回転体１６は、右リンク１３と左リンク１４とは左右対称で同じ構成である。 The steering rotor 16 has an outer peripheral wall 56 having three surfaces, the front, rear and outer side, and five surfaces, the top wall 57 and the bottom wall 55, and the top wall 57 and the bottom wall 55 are attached to the end of the link rod body 15a or 15b by bearings so that they can rotate in the left and right direction. As a result, the steering rotor 16 can rotate integrally with the left driven link 23a or the right driven link 23b in the left and right direction X, and the link rod bodies 15a and 15b and the steering rotor 16 can move in the up and down direction S by rotating in the up and down direction S between the bearing plate 35 and the fulcrum shaft 50 as shown in FIG. 9 due to the inclination of the lower link 12 and the upper link 11. The steering rotor 16 is symmetrical to the right link 13 and the left link 14 and has the same configuration.

また、前記操舵用回転体１６は、図３、図８～図１１に示すように、後側の外周壁部５６に左従動リンク２３ｂを締結手段で固定している。これにより、ハンドル６４を回すと、操舵リンク３を介して前記操舵用回転体１６が左右方向に回り、前輪６２が曲がる。同時に右従動リンク２３ａも回転し前輪６１も曲がる。 As shown in Figures 3, 8 to 11, the steering rotor 16 has the left driven link 23b fixed to the rear outer peripheral wall portion 56 by a fastening means. As a result, when the handlebars 64 are turned, the steering rotor 16 rotates left and right via the steering link 3, causing the front wheel 62 to turn. At the same time, the right driven link 23a also rotates, causing the front wheel 61 to turn.

さらに、前記操舵用回転体１６は、図５、図６、図８～図１０に示すように、左側の前輪６２側で説明するが、右側の前輪６１側も同じ構造及び作動をする。前輪６２側の外周壁面５６に前輪６２の車輪軸６６の一端部が締結手段６８で固定される。よって、ハンドル６４を回すと操舵リンク３を介して前記操舵用回転体１６が左右方向に回り、前輪６２の車輪軸６６の向きが変わり前輪６２が回転し曲がる。 Furthermore, as shown in Figures 5, 6, and 8 to 10, the steering rotor 16 will be described on the left front wheel 62 side, but the right front wheel 61 side has the same structure and operation. One end of the wheel axle 66 of the front wheel 62 is fixed to the outer peripheral wall surface 56 on the front wheel 62 side by a fastening means 68. Therefore, when the handle 64 is turned, the steering rotor 16 rotates left and right via the steering link 3, changing the direction of the wheel axle 66 of the front wheel 62, causing the front wheel 62 to rotate and turn.

三輪自転車１を略水平な路面Ｇを走行させているときは、図１６（ａ）の三輪自転車模式図１００ａに示すように上リンク１１及び下リンク１２は略水平方向の状態で走行する。そして、図１６（ｂ）に示すように三輪自転車１を段差のある路面Ｇ又は斜面（図示なし）を走行するときは、上リンク１１及び下リンク１２は傾斜状態に変わるが、右リンク１３及び左リンク１４は略垂直状態を維持するので前輪６１及び前輪６２は略垂直状態を維持するので重心は変わらず安定性が高いレベルで維持できるので倒れにくい。 When the tricycle 1 is traveling on a nearly horizontal road surface G, the upper link 11 and the lower link 12 travel in a nearly horizontal state, as shown in the schematic diagram 100a of the tricycle in FIG. 16(a). Then, when the tricycle 1 travels on a stepped road surface G or a slope (not shown), as shown in FIG. 16(b), the upper link 11 and the lower link 12 change to an inclined state, but the right link 13 and the left link 14 maintain a nearly vertical state, and the front wheels 61 and 62 maintain a nearly vertical state, so the center of gravity does not change and a high level of stability is maintained, making it less likely to tip over.

また、図１６（ｃ）に示すように、三輪自転車１を略水平な路面Ｇでハンドル６４を左右方向に切って曲がるときは、前輪６１、前輪６２及びハンドル軸５を同じ角度で傾斜させて曲がることができるので、二輪自転車の曲がりやすさを有しながら三輪自転車の倒れにくいという安定性を有することができる。 Also, as shown in FIG. 16(c), when turning the handlebars 64 left and right on a substantially horizontal road surface G, the front wheels 61, 62 and the handlebar shaft 5 can be tilted at the same angle to turn, so that the tricycle has the stability of a tricycle, which is less likely to tip over, while still having the ease of turning of a two-wheeled bicycle.

次に、操舵リンク３について説明する。前記操舵リンク３は、図３、図４、図６～図８に示すように、前記外歯平歯車４０に固定されたピン５１の下端部に一端側を固定した駆動リンク２１、前記左右のリンク１３、１４それぞれから突出された右従動リンク２３ａ、左従動リンク２３ｂ、並びに、前記駆動リンク２１と一端側を回転可能に連結し他端側を右従動リンク２３ａ又は左従動リンク２３ｂと回転可能に連結した２つの連結棒２４を備える。 Next, the steering link 3 will be described. As shown in Figures 3, 4, and 6 to 8, the steering link 3 includes a driving link 21, one end of which is fixed to the lower end of a pin 51 fixed to the external spur gear 40, a right driven link 23a and a left driven link 23b protruding from the left and right links 13 and 14, respectively, and two connecting rods 24, one end of which is rotatably connected to the driving link 21 and the other end of which is rotatably connected to the right driven link 23a or the left driven link 23b.

図３に示すように、ハンドル６４に上端を固定されたハンドル軸５の下端部に固定された操舵筒状体７の内歯３０に噛み合う外歯平歯車４０に固定されたピン５１に、駆動リンク２１の一端側が固定され、ハンドル６４を左右方向に切ることにより駆動リンク２１が前記内歯３０と前記外歯歯車４０とのギア比により同時に左右方向に回転する。そして、駆動リンク２１の他端側はボールジョイントにより連結棒２４と回転可能に連結されている。 As shown in FIG. 3, one end of the drive link 21 is fixed to a pin 51 fixed to an external spur gear 40 that meshes with the internal teeth 30 of a steering cylinder 7 that is fixed to the lower end of a handle shaft 5 whose upper end is fixed to a handle 64. When the handle 64 is turned left or right, the drive link 21 simultaneously rotates left or right due to the gear ratio between the internal teeth 30 and the external gear 40. The other end of the drive link 21 is rotatably connected to a connecting rod 24 by a ball joint.

また、図８～図１０に示すように、前記右リンク１３又は左リンク１４の構成要素である前記操舵用回転体１６には右従動リンク２３ａ又は左従動リンク２３ｂの一端側が固定されている。 As shown in Figures 8 to 10, one end of the right driven link 23a or the left driven link 23b is fixed to the steering rotor 16, which is a component of the right link 13 or the left link 14.

よって、平行リンク２と操舵リンク３を記載した図６又は三輪自転車模式１０１ａを表した図１７（ａ）に示すように、前輪６１、６２がまっすぐな状態で直進状態から、図７又は図１５（ｂ）に示すようにハンドル６４を左右方向に切ることにより駆動リンク２１が同時に左右方向に回転し、連結棒２４を介して右従動リンク２３ａ及び左従動リンク２３ｂが回り、これにより前記右リンク１３及び左リンク１４が左右方向に回転し前輪６１、６２が左右方向に曲がる。 As shown in FIG. 6, which depicts the parallel link 2 and steering link 3, or FIG. 17(a), which depicts the three-wheeled bicycle model 101a, when the front wheels 61, 62 are in a straight-ahead position and the handlebars 64 are turned left or right as shown in FIG. 7 or FIG. 15(b), the driving link 21 simultaneously rotates left or right, and the right driven link 23a and left driven link 23b rotate via the connecting rod 24, causing the right link 13 and left link 14 to rotate left or right, causing the front wheels 61, 62 to turn left or right.

次に、前記平行リンク２及び操舵リンク３を備えた場合のハンドル６４の切れ角度、前輪の曲がり角度、左右の前輪間の間隔について説明する。 Next, we will explain the steering angle of the handlebars 64, the turning angle of the front wheels, and the distance between the left and right front wheels when the parallel link 2 and steering link 3 are installed.

まず、前記平行リンク２及び操舵リンク３等のハンドルの切れに応じて動く部位と、各部位間の連結方法が回転自在、固定又は噛み合いであるかを説明する。図１５（ａ）に示すように、平行リンク２の上リンク１１及び下リンク１２の中央部は操舵筒状体７の前側に固定された平行リンク支承部８から突出したピン４１ａ、４１ｂと上下方向に回転自在に支承され、かつ前記操舵筒状体７の回転と一体的に旋回するように取り付けられている。また、前記操舵筒状体７の内歯３０は外歯平歯車４０と噛み合っている。そして、前記外歯平歯車４０はピン５１と固定され、かつピン５１は駆動リンク２１とも固定されている。よって、前記外歯平歯車４０が回転すれば前記駆動リンク２１は同期して同じ回転角度分ほど回転する。 First, the parts such as the parallel link 2 and the steering link 3 that move in response to the turning of the steering wheel and the method of connection between each part, whether they are rotatable, fixed, or meshed, will be explained. As shown in FIG. 15(a), the center parts of the upper link 11 and the lower link 12 of the parallel link 2 are supported by pins 41a and 41b protruding from the parallel link support part 8 fixed to the front side of the steering cylinder body 7 so as to be rotatable in the vertical direction, and are attached so as to rotate integrally with the rotation of the steering cylinder body 7. In addition, the internal teeth 30 of the steering cylinder body 7 mesh with the external teeth spur gear 40. The external teeth spur gear 40 is fixed to a pin 51, which is also fixed to the driving link 21. Therefore, when the external teeth spur gear 40 rotates, the driving link 21 rotates synchronously by the same rotation angle.

そして、上リンク１１と下リンク１２の左右方向の両端部には左右方向に回転自在に操舵用回転体１６が設けられている。そして、前記操舵用回転体１６の後方側の壁面にはそれぞれ右従動リンク２３ａ又は左従動リンク２３ｂが固定され、前記操舵用回転体１６の外方向側の壁面にはそれぞれ左右の車輪軸６６が固定されている。よって、駆動リンク２１が回転すると右従動リンク２３ａと左従動リンク２３が回転し、これによって前記操舵用回転体１６が回転し、これによって前記車輪軸６６が回転し前輪６１、６２が曲がる。 The steering rotor 16 is provided at both left and right ends of the upper link 11 and the lower link 12 so as to be rotatable left and right. The right driven link 23a and the left driven link 23b are fixed to the rear wall surface of the steering rotor 16, and the left and right wheel axles 66 are fixed to the outer wall surface of the steering rotor 16. Therefore, when the drive link 21 rotates, the right driven link 23a and the left driven link 23 rotate, which rotates the steering rotor 16, which rotates the wheel axle 66 and turns the front wheels 61, 62.

したがって、図１５（ｂ）に示すように、ハンドル６４を切ると操舵筒状体７が回転して平行リンク２を回転させ、同時に操舵筒状体７が回転して内歯３０と外歯平歯車４０とのギア比で駆動リンク２１を回転させ操舵用回転体１６を回転させる。すると、前輪６１、６２は、図１５（ｂ）及び図１７（ｄ）に示すように、ハンドルの切り角度θ１に加えて前記外歯平歯車４０の回転角度θ２を加算させた曲がり角度θ３で前２輪を曲げることができる。 As shown in FIG. 15(b), when the steering wheel 64 is turned, the steering cylinder 7 rotates to rotate the parallel link 2, and at the same time, the steering cylinder 7 rotates to rotate the drive link 21 with the gear ratio between the internal teeth 30 and the external teeth spur gear 40, thereby rotating the steering rotor 16. Then, as shown in FIG. 15(b) and FIG. 17(d), the front two wheels 61, 62 can turn at a turning angle θ3 obtained by adding the turning angle θ1 of the steering wheel to the rotation angle θ2 of the external teeth spur gear 40.

本発明の三輪自転車１のハンドルの切り角度と前輪の曲がり角度、左右の前輪間の間隔について、説明する。図１７（ａ）、（ｄ）に本発明の操舵筒状体７に係る機構、操舵用回転体を設けた平行リンク２、操舵筒状体７にかみ合う外歯平歯車４０と一体的に回転する操舵回転体１６を構成する操舵リンク３を備えた三輪自転車１０１ｂを示し、比較例として、図１７（ｂ）及び（ｃ）に本発明の操舵筒状体７に係る機構、操舵用回転体を設けた平行リンク２、操舵筒状体７にかみ合う外歯平歯車４０と一体的に回転する操舵回転体１６を構成する操舵リンク３を備えない場合の三輪自転車１０１ｂを示している。図１７（ａ）はハンドルを切っていない状態を示し、正面視Ｑからみて左右の前輪間の間隔Ｌ１は最も広く安定性を有する。なお、内歯３０と外歯平歯車４０とのギア比は３：２とする。 The steering angle, front wheel turning angle, and distance between the left and right front wheels of the three-wheeled bicycle 1 of the present invention will be described. Figures 17(a) and (d) show a three-wheeled bicycle 101b equipped with the mechanism related to the steering cylinder 7 of the present invention, the parallel link 2 with the steering rotor, and the steering link 3 constituting the steering rotor 16 that rotates integrally with the external spur gear 40 that meshes with the steering cylinder 7. As a comparative example, Figures 17(b) and (c) show a three-wheeled bicycle 101b that does not have the mechanism related to the steering cylinder 7 of the present invention, the parallel link 2 with the steering rotor, and the steering link 3 constituting the steering rotor 16 that rotates integrally with the external spur gear 40 that meshes with the steering cylinder 7. Figure 17(a) shows a state where the steering is not turned, and the distance L1 between the left and right front wheels is the widest and most stable when viewed from the front Q. The gear ratio between the internal teeth 30 and the external spur gear 40 is 3:2.

図１７（ｂ）に示すように、ハンドル切り角度θ３を大きく、例えば５０度にすると小回りができるが、正面視Ｑからみて左右の前輪間の間隔Ｌ２が狭くなり二輪自転車並みに近づくので安定性が低下する。一方、図１７（ｃ）に示すように、ハンドル切り角度θ１を小さく、例えば２０度にすると正面視Ｑからみて左右の前輪間の間隔Ｌ３は広くなり三輪自転車としての三角形が大きくできるので安定性を確保できるが小回りができない。 As shown in Figure 17(b), if the steering angle θ3 is made large, for example 50 degrees, the vehicle can turn in a small circle, but the distance L2 between the left and right front wheels when viewed from the front Q becomes narrower, approaching that of a two-wheeled bicycle, reducing stability. On the other hand, as shown in Figure 17(c), if the steering angle θ1 is made small, for example 20 degrees, the distance L3 between the left and right front wheels when viewed from the front Q becomes wider, and the triangle of a three-wheeled bicycle becomes larger, ensuring stability but reducing maneuverability.

本発明の三輪自転車は、図１７（ｄ）に示すように、ハンドル切り角度θ１を小さく、例えば２０度にすると、平行リンク２は角度θ１の２０度回転し、さらに内歯３０と外歯歯車４０のギア比によって操舵リンク３は角度θ２の３０度回転することから、前輪６１、６２は角度θ３の５０度曲がる。これにより、本発明の三輪自転車１は、ハンドルの切れが抜きんでて良く、かつ正面視Ｑからみて左右の前輪間の間隔Ｌ３は前輪の同じ曲がり角度に比較して広いので安定性を確保できるという有利な効果がある。 As shown in Figure 17(d), when the steering angle θ1 of the three-wheeled bicycle of the present invention is small, for example 20 degrees, the parallel link 2 rotates at an angle θ1 of 20 degrees, and the gear ratio between the internal gear 30 and the external gear 40 causes the steering link 3 to rotate at an angle θ2 of 30 degrees, so that the front wheels 61, 62 turn at an angle θ3 of 50 degrees. As a result, the three-wheeled bicycle 1 of the present invention has an excellent steering ability, and since the distance L3 between the left and right front wheels when viewed from the front Q is wider than the same turning angle of the front wheels, it has the advantageous effect of ensuring stability.

前記平行リンク２及び操舵リンク３をともに前輪６１、６２の車輪軸６６の高さ近傍に設けることができたので、重心が低くて転倒し難く、構造が簡易で製造コストが安価化できることを実現できた。 The parallel link 2 and steering link 3 can both be installed near the height of the wheel axle 66 of the front wheels 61, 62, which makes it possible to achieve a low center of gravity, a less prone to tipping over, a simple structure, and low manufacturing costs.

また、平行リンクロック手段は、図３、図５、図１７に示すように、前記平行リンク２の姿勢を維持可能な平行リンクロック手段であって、前記平行リンクロック手段が、前記上リンク１１に固定した略半円盤状体５２と、前記操舵筒状体７、言い換えると平行リンク支承体８の前側に固定した、前記略半円盤状体５２を前後方向で挟持可能な把持部５３と、３輪のうちのいずれかの車輪の回転速度を測定する速度測定手段（図示なし）と、制御部（図示なし）と、を備え、前記制御部が、前記速度測定手段からの速度が予め設定した速度以下のとき、例えば５ｋｍ／Ｈ以下のときに前記把持部５３が前記略円盤状体５２を挟持し前記平行リンク２の姿勢をロックし、前記速度が予め設定した速度超のときに、例えば５ｋｍ／Ｈ超のときに前記把持部５３をロック解除させ前記平行リンクを上下方向に回転自在とする制御を行う。 As shown in Figures 3, 5, and 17, the parallel link locking means is a parallel link locking means capable of maintaining the posture of the parallel link 2, and the parallel link locking means includes an approximately semi-disc-shaped body 52 fixed to the upper link 11, a gripping portion 53 fixed to the front side of the steering cylinder-shaped body 7, in other words, the parallel link support body 8, capable of clamping the approximately semi-disc-shaped body 52 in the front-rear direction, a speed measuring means (not shown) for measuring the rotational speed of any one of the three wheels, and a control portion (not shown). When the speed from the speed measuring means is equal to or lower than a preset speed, for example, 5 km/H or lower, the gripping portion 53 clamps the approximately disc-shaped body 52 to lock the posture of the parallel link 2, and when the speed exceeds the preset speed, for example, 5 km/H, the gripping portion 53 is unlocked to allow the parallel link to rotate freely in the vertical direction.

これにより、予め定めた速度以下のときには平行リンク２の傾きをロックするので、三輪自転車１を走行し始めた時の走行不安定状態を解消させ安心して運転できる状態にすることができる。 This locks the inclination of the parallel link 2 when the speed is below a predetermined speed, eliminating the unstable state that occurs when the tricycle 1 starts to move, allowing the rider to ride safely.

１ 三輪自転車
２ 平行リンク
３ 操舵リンク
４ フレーム体
５ ハンドル軸
６ ハンドルフレーム
７ 操舵筒状体
８ 平行リンク支承部
９ 底部支持体
１１ 上リンク
１２ 下リンク
１２ａ 貫通孔
１３ 右リンク
１４ 左リンク
１５ リンク用ロッド体
１６ 操舵用回転体
２１ 駆動リンク
２３ａ 右従動リンク
２３ｂ 左従動リンク
２４ 連結棒
３０ 内歯
４０ 外歯平歯車
４１ ピン
４２ ベアリング
５０ 支点軸
５１ ピン
５２ 略半円盤状体
５３ 把持部
５５ 底壁部
５６ 外周壁部
５７ 天壁部
６１ 前輪
６２ 前輪
６３ 後輪
６４ ハンドル
６６ 車輪軸
６７ サドル
６８ 締結手段
６９ ペダル
１００ 三輪自転車模式図 Reference Signs List 1 Three-wheeled bicycle 2 Parallel link 3 Steering link 4 Frame body 5 Handle shaft 6 Handle frame 7 Steering cylinder-shaped body 8 Parallel link support portion 9 Bottom support body 11 Upper link 12 Lower link 12a Through hole 13 Right link 14 Left link 15 Link rod body 16 Steering rotor 21 Driving link 23a Right driven link 23b Left driven link 24 Connecting rod 30 Internal teeth 40 External teeth spur gear 41 Pin 42 Bearing 50 Fulcrum shaft 51 Pin 52 Approximately semi-disk-shaped body 53 Grip portion 55 Bottom wall portion 56 Outer peripheral wall portion 57 Top wall portion 61 Front wheel 62 Front wheel 63 Rear wheel 64 Handle 66 Wheel shaft 67 Saddle 68 Fastening means 69 Pedal 100 Three-wheeled bicycle schematic diagram

Claims (3)

前２輪を備えた三輪自転車であって、
上端部をハンドルの中央部に固定し、筒状のハンドルフレーム体内に回転自在に挿通させたハンドル軸と、
上端部を前記ハンドル軸の下端部に固定して垂設させた、下端部の内周壁部に内歯が形成された略筒状体の操舵筒状体と、
前記操舵筒状体の前側に固定され、前方に上下で２つのピンを突設させた平行リンク支承部と、
前記平行リンク支承部に上下方向に回転可能に支承され、左右方向は前記平行リンク支承部と一体的に回転可能に取り付けられた上リンク及び下リンク、前記上リンク及び前記下リンクの右端部とそれぞれ上下方向に回転可能に連結され、右側の前輪の車輪軸を固定した右リンク、並びに、前記上リンク及び前記下リンクの左端部とそれぞれ上下方向に回転可能に連結され、左側の前輪の車輪軸を固定した左リンクを備えた平行リンクと、
上端部を前記ハンドルフレーム体の外周壁部に固定させて垂設させた２本の板状部、及び、前記２本の板状部の下端に架設した平板部を有する略コ字状の底部支持体と、
前記底部支持体の平板部に設けた孔に挿通させたピンの上端部に回転中心部を固定し、かつ前記平板部の上面側に配設した、前記操舵筒状体の内歯に噛み合う外歯平歯車と、
前記平板部の下方に突出した前記ピンの下端部に一端側を固定した駆動リンク、前記左リンクに一端側を固定した左従動リンク、前記右リンクに一端側を固定した右従動リンク、並びに、前記駆動リンクと一端側を左右方向に回転可能に連結し他端側を前記右従動リンク又は左従動リンクと左右方向に回転可能に連結した２つの連結棒を備えた操舵リンクと、を備え、
前記前２輪が、前記ハンドル軸と一体的に左右方向に回転可能に連結された前記平行リンクによる曲がり角度と、前記ハンドル軸とは前記外歯平歯車と前記内歯とのギア比によって異なる回転角度をする前記操舵リンクによる曲がり角度とを加えた曲がり角度で曲がることを特徴とする三輪自転車。 A three-wheeled bicycle with two front wheels,
A handle shaft having an upper end fixed to a center portion of the handle and rotatably inserted into a cylindrical handle frame body;
a steering cylinder-like body having an upper end portion fixed vertically to a lower end portion of the handle shaft and an inner peripheral wall portion of a lower end portion formed with internal teeth;
A parallel link support part is fixed to the front side of the steering cylinder-shaped body and has two pins protruding forward, one above the other;
a parallel link including an upper link and a lower link supported on the parallel link support portion so as to be rotatable in the vertical direction and attached so as to be rotatable integrally with the parallel link support portion in the horizontal direction, a right link connected to right ends of the upper link and the lower link so as to be rotatable in the vertical direction and to which an axle of a right front wheel is fixed, and a left link connected to left ends of the upper link and the lower link so as to be rotatable in the vertical direction and to which an axle of a left front wheel is fixed;
a bottom support body having a generally U-shape and including two plate-like portions vertically fixed at upper ends to an outer peripheral wall portion of the handle frame body and a flat plate portion bridged between lower ends of the two plate-like portions;
an externally toothed spur gear, the rotation center of which is fixed to the upper end of a pin inserted through a hole provided in the flat plate portion of the bottom support, and which is disposed on the upper surface side of the flat plate portion and engages with the internal teeth of the steering cylinder body;
a driving link having one end fixed to a lower end of the pin protruding below the flat plate portion, a left driven link having one end fixed to the left link, a right driven link having one end fixed to the right link, and a steering link including two connecting rods, one end of which is connected to the driving link so as to be rotatable in the left-right direction and the other end of which is connected to the right driven link or the left driven link so as to be rotatable in the left-right direction,
said two front wheels turn at an angle equal to the sum of a turning angle made by said parallel link which is connected to said handle shaft so as to be rotatable in the left and right direction integrally with said handle shaft, and a turning angle made by said steering link which rotates at different angles with respect to said handle shaft depending on a gear ratio between said external spur gear and said internal gear. 前記外歯平歯車と前記内歯とのギア比を変えることによって、及び／又は、前記駆動リンクの長さを変えることによって、前記ハンドルの切れ角度に対する前輪の曲がり角度の比率を変られることを特徴とする請求項１に記載の三輪自転車。 The three-wheeled bicycle according to claim 1, characterized in that the ratio of the front wheel turning angle to the handlebar turning angle can be changed by changing the gear ratio between the external spur gear and the internal gear and/or by changing the length of the drive link. 前記平行リンクの姿勢を維持可能な平行リンクロック手段であって、前記平行リンクロック手段が、
前記上リンクに固定した略半円盤状体と、
前記操舵筒状体の前側に固定した、前記略半円盤状体を前後方向で挟持可能な把持部と、
３輪のうちのいずれかの車輪の回転速度を測定する速度測定手段と、制御部と、を備え、
前記制御部が、前記速度測定手段からの速度が予め設定した速度以下のときに前記把持部が前記略半円盤状体を挟持し前記平行リンクの姿勢をロックし、前記速度が予め設定した速度超のときに前記把持部をロック解除させ前記平行リンクを上下方向に回転自在とする制御をすることを特徴とする請求項１又は２に記載の三輪自転車。 A parallel link locking means capable of maintaining the attitude of the parallel link, the parallel link locking means comprising:
A substantially semi-disk-shaped body fixed to the upper link;
a gripping portion fixed to a front side of the steering cylinder-shaped body and capable of holding the substantially semi-disk-shaped body in a front-rear direction;
The vehicle is provided with a speed measuring means for measuring the rotation speed of any one of the three wheels, and a control unit,
The three-wheeled bicycle according to claim 1 or 2, characterized in that the control unit controls the gripping portion to clamp the approximately semi- disk-shaped body and lock the posture of the parallel links when the speed from the speed measuring means is equal to or lower than a preset speed, and releases the gripping portion from being locked when the speed exceeds the preset speed, allowing the parallel links to freely rotate in the vertical direction.
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Citations (3)

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JP2002337779A (en) 2001-05-21 2002-11-27 Abanteku:Kk Tricycle
CN1391374A (en) 2001-06-06 2003-01-15 皇家菲利浦电子有限公司 Selective grouping retransmission with time control on transmitter terminal
FR3088296A1 (en) 2018-11-09 2020-05-15 Eurl Lagar Concept TRICYCLE

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JP5314176B1 (en) * 2012-07-18 2013-10-16 克子 小林 Tricycle
CN109383673B (en) * 2017-08-08 2020-07-14 黄宽龙 Steering and tilting system for vehicle

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JP2002337779A (en) 2001-05-21 2002-11-27 Abanteku:Kk Tricycle
CN1391374A (en) 2001-06-06 2003-01-15 皇家菲利浦电子有限公司 Selective grouping retransmission with time control on transmitter terminal
FR3088296A1 (en) 2018-11-09 2020-05-15 Eurl Lagar Concept TRICYCLE

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