JP2010023815A - Bottom bracket shaft of bicycle - Google Patents

Bottom bracket shaft of bicycle Download PDF

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Publication number
JP2010023815A
JP2010023815A JP2008208773A JP2008208773A JP2010023815A JP 2010023815 A JP2010023815 A JP 2010023815A JP 2008208773 A JP2008208773 A JP 2008208773A JP 2008208773 A JP2008208773 A JP 2008208773A JP 2010023815 A JP2010023815 A JP 2010023815A
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bottom bracket
chainring
bracket shaft
shaft
bicycle
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JP4999011B2 (en
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Norihiko Ito
則彦 伊藤
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Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that there is burden to obtain propulsive force as a result that a bottom bracket shaft is constituted to integrally rotate right and left cranks and a chain ring, in a structure of a propulsion device of a conventional bicycle. <P>SOLUTION: The bottom bracket shaft 1 to be a propulsion device of the bicycle is constituted to be rotated integrally with the right and left cranks. Alternatively, the bottom bracket shaft 1 becomes a transmission device by inserting a bolt with a connecting screw into the chain ring 7 capable of originally rotating in a portion in a right direction of a main shaft of the bottom bracket shaft 1 and mounting the bolt in an outer screw hole of the right side crank 14, and becomes a rotating lever structure by rotation to obtain propulsive force. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、自転車の推進装置の開発を目的としたボトムブラケットシャフトに関する。  The present invention relates to a bottom bracket shaft for the purpose of developing a bicycle propulsion device.

従来の自転車の推進装置にはボトムブラケットシャフトは左右のクランクとチェーンリングは一体構造で回転する構造である。
そのボトムブラケットシャフトの主軸を左右のクランクによって軸心を回転して推進力を得るには大きな負担となる。In the conventional bicycle propulsion device, the bottom bracket shaft has a structure in which the left and right cranks and the chain ring rotate as an integral structure.
It becomes a heavy burden to obtain propulsive force by rotating the axis of the main shaft of the bottom bracket shaft by the left and right cranks.

以上に述べた従来の自転車のボトムブラケットシャフトの構造に問題があり推進力を得ることができないものであった。
その自転車の推進装置であるボトムブラケットシャフトの構造の変化を求められている。There has been a problem with the structure of the bottom bracket shaft of the conventional bicycle described above, and it has been impossible to obtain a propulsive force.
There is a demand for a change in the structure of the bottom bracket shaft, which is the propulsion device for the bicycle.

本発明は、このような従来の構成が有していた問題を解決しょうとするものであり、自転車の推進装置ボトムブラケットシャフトの技術開発は一定のまま進歩がなく現在に至る。そのボトムブラケットシャフトはチェーンリングを分離回転することによって新しい技術開発を前進させることを目的とするものである。  The present invention is intended to solve the problems of such a conventional configuration, and the technical development of the bottom bracket shaft of the bicycle propulsion device remains constant and does not progress. The bottom bracket shaft is intended to advance new technology development by rotating the chainring separately.

そして、本発明は上記目的を達成するために自転車のボトムブラケットシャフトの主軸の両側にベアリング、その主軸の中央より右方向の位置に位置決めツバ付きブッシュ大を装着する、及び六角内径ネジ付きブッシュ大の部品を取り付けたことを特徴とする。  In order to achieve the above object, the present invention has bearings on both sides of the main shaft of the bottom bracket shaft of the bicycle, and a large bush with a positioning collar at a position to the right of the center of the main shaft. It is characterized by attaching parts.

また、ボトムブラケットシャフトの主軸に六角内径ネジ付きブッシュ大の外径にチェーンリング本体の埋め込みブッシュ大を挿入することによって、チェーリング本体がボトムブラケットシャフトの主軸の部分で独自に回転できる構造になる。  Further, by inserting the embedded bushing size of the chainring body into the outer diameter of the bushing with a hexagonal inner diameter screw on the main shaft of the bottom bracket shaft, the chaining body can be rotated independently on the main shaft portion of the bottom bracket shaft.

その、チェーンリング本体はアルミダイカスト鋳造品である、そのチェーンリング本体にチェーンリングをボルト付きナットで固定する、チェーンリング本体の中心にボス大、その中心より外テコの原理を応用できる距離の位置に外ボス小がある、その中に埋め込みブッシュ小が挿入されている。  The chainring body is an aluminum die-cast casting. The chainring is fixed to the chainring body with a nut with a bolt, the boss is large at the center of the chainring body, and the position where the outside lever principle can be applied from the center. There is a small outer boss, and a small embedded bush is inserted in it.

また、埋め込みブッシュ小に連結ネジ付きボルトを挿入して片方向のネジ部を右側クランクの外ネジ穴に締め付けて固定する、右ペダルの右側クランクは外テコとなり、左ペダルの左側クランクは内テコとなる、回転することによって回転テコ構造となる。  Also, insert a bolt with a connecting screw into the small embedded bush and fasten and fix the screw part in one direction to the outer screw hole of the right crank.The right crank of the right pedal becomes an outer lever and the left crank of the left pedal becomes an inner lever. It becomes a rotating lever structure by rotating.

また、第２の課題解決手段は、連結ネジ付きボルトを装着する構成としたものである。  Further, the second problem solving means is configured to attach a bolt with a connecting screw.

上記第１の課題解決手段による作用は次の通りである。自転車の推進装置ボトムブラケットシャフトは左右のクランクと一体で回転することができる。  The operation of the first problem solving means is as follows. The bicycle propulsion device bottom bracket shaft can rotate integrally with the left and right cranks.

また、第２の課題解決手段による作用は、ボトムブラケットシャフトの主軸の右方向の部分で独自に回転することができるチェーンリング本体に装着された連結ネジ付きボルトを右側クランクの外ネジ穴に装着することによって回転テコの構成となり推進力という効果を発揮する。  In addition, the second problem solving means operates by attaching a bolt with a connecting screw attached to a chain ring body that can independently rotate at the right portion of the main shaft of the bottom bracket shaft to the outer screw hole of the right crank. As a result, it becomes a structure of a rotating lever and demonstrates the effect of propulsion.

上述したように本発明は自転車の推進装置に回転テコ構造を応用した自転車を提供できる。  As described above, the present invention can provide a bicycle in which a rotating lever structure is applied to a bicycle propulsion device.

また、自転車の回転テコ構造によって構成された推進装置は推進力に効果を発揮するものである。  Further, the propulsion device configured by the rotating lever structure of the bicycle exhibits an effect on the propulsive force.

以下、本発明の実施の形態を図２に基づいて説明する。  Hereinafter, an embodiment of the present invention will be described with reference to FIG.

図においては、１はボトムブラケットシャフトの主軸の両側にベアリング２、その主軸の中央より右方向の位置に位置決めツバ付きブッシュ大３を装着する、及び六角内径ネジ付きブッシュ大４の部品を取り付けたことを特徴とする。  In the figure, reference numeral 1 indicates that bearings 2 are mounted on both sides of the main shaft of the bottom bracket shaft, a bush 3 with a positioning collar is mounted on the right side of the center of the main shaft, and a large bush 4 with a hexagonal bore screw is attached. It is characterized by.

また、ボトムブラケットシャフト１の主軸に六角内径ネジ付きブッシュ大４の外径にチェーンリング本体５の埋め込みブッシュ大６を挿入することによって、チェーンリング本体５がボトムブラケットシャフト１の主軸の右方向の部分で独自に回転できる構造になる。  Further, by inserting the large embedded bushing 6 of the chainring body 5 into the outer diameter of the bushing 4 with a hexagonal inner diameter screw on the main shaft of the bottom bracket shaft 1, the chainring main body 5 is positioned at the right portion of the main shaft of the bottom bracket shaft 1. The structure can be rotated independently.

ここでチェーンリング本体５はアルミダイカスト鋳造品である、そのチェーンリング本体５にチェーンリング７をボルト付きナット８で固定する、チェーンリング本体５の中心部にボス大９、その中心より外テコの原理を応用できる距離の位置に外ボス１０がある、その中に埋め込みブッシュ小１１が挿入されている。  Here, the chain ring body 5 is an aluminum die-cast product, and the chain ring 7 is fixed to the chain ring body 5 with a nut 8 with a bolt. An outer boss 10 is located at a distance where the principle can be applied, and a small embedded bush 11 is inserted therein.

また、埋め込みブッシュ小１１に連結ネジ付ボルト１２を挿入して片方向のネジ部を右側クランク１４の外ネジ穴１３に締め付けて固定する、右ペダル１５の右側クランク１４は外テコとなり、左ペダル１７の左側クランク１６は内テコとなる、回転することによって回転テコ構造となる。  Further, a bolt 12 with a connecting screw is inserted into the small embedded bush 11 and a unidirectional screw portion is fastened and fixed to the outer screw hole 13 of the right crank 14. The right crank 14 of the right pedal 15 becomes an outer lever, and the left pedal The left side crank 16 of 17 becomes an internal lever, and becomes a rotating lever structure by rotating.

以下、上記構成の動作を説明する。自転車の推進装置であるボトムブラケットシャフト１の主軸の片側で独自に回転できるチェーンリング本体５に回転テコ構造を構成することによって、そこに挿入した連結ネジ付きボルト１２を右側クランク１４の外ネジ穴１３に装着すると回転テコ構造となり、回転テコの力という効果を発揮する。以上のように、本実施形態によれば推進力の効果が得られるものである。  The operation of the above configuration will be described below. By constructing a rotating lever structure in the chain ring body 5 that can independently rotate on one side of the main shaft of the bottom bracket shaft 1 that is a bicycle propulsion device, the bolt 12 with a connecting screw inserted therein is inserted into an outer screw hole 13 of the right crank 14. When it is attached, it becomes a rotating lever structure and demonstrates the effect of rotating lever power. As described above, according to the present embodiment, the effect of the propulsive force can be obtained.

上述の発明は、自転車の推進装置として推進力を求められている、自転車に回転テコ構造を応用することが利用可能である。  The above-described invention can be used to apply a rotating lever structure to a bicycle, for which a propulsive force is required as a bicycle propulsion device.

本図面の実施形態を示す推進装置の平面図  The top view of the propulsion apparatus which shows embodiment of this drawing 同推進装置の図１におけるＡ−Ａ断面図  AA sectional view of the propulsion device in FIG. 同推進装置の図１におけるＢ−Ｂ断面図  BB sectional view of the propulsion device in FIG. 同推進装置の右側面図  Right side view of the propulsion device 同推進装置の左側面図  Left side view of the propulsion device

符号の説明Explanation of symbols

１ ボトムブラケットシャフト
２ ベアリング
３ 位置決めツバ付きブッシュ大
４ 六角内径ネジ付きブッシュ大
５ チェーンリング本体
６ 埋め込みブッシュ大
７ チェーンリング
８ ボルト付きナット
９ ボス大
１０ 外ボス小
１１ 埋め込みブッシュ小
１２ 連結ネジ付きボルト
１３ 外ネジ穴
１４ 右側クランク
１５ 右ペダル
１６ 左側クランク
１７ 左ペダル1 Bottom bracket shaft 2 Bearing 3 Bushing with positioning collar 4 Bushing with hexagonal bore screw 5 Chainring body 6 Embedded bushing 7 Chainring 8 Nut with bolt 9 Boss large 10 Outer boss small 11 Embedded bushing small 12 Connecting screw bolt 13 External screw hole 14 Right crank 15 Right pedal 16 Left crank 17 Left pedal

Claims (4)

自転車のボトムブラケットシャフトの主軸の両側にベアリング、その主軸の中央より右方向の位置に位置決めツバ付きブッシュ大を装着する、及び六角内径ネジ付きブッシュ大の部品を取り付けたことを特徴とする。  It is characterized in that bearings are mounted on both sides of the main shaft of the bottom bracket shaft of the bicycle, bushes with positioning flanges are mounted on the right side of the center of the main shaft, and bushes with hexagonal inner diameter screws are mounted. 請求項１記載のボトムブラケットシャフトの主軸の右方向に六角内径ネジ付きブッシュ大の外径にチェーンリング本体の埋め込みブッシュ大を挿入することによって、チェーンリング本体がボトムブラケットシャフトの主軸の右方向の部分で独自に回転できる構造になる。  By inserting the embedded bushing size of the chainring body into the outer diameter of the large hexagonal threaded bushing in the right direction of the main shaft of the bottom bracket shaft according to claim 1, the chainring main body is positioned at the right portion of the main shaft of the bottom bracket shaft. The structure can be rotated independently. 請求項２記載のチェーンリング本体はアルミダイカスト鋳造品である、そのチェーンリング本体にチェーンリングをボルト付きナットで固定する、チェーンリング本体の中心部にボス大、その中心より外テコの原理を応用できる距離の位置に外ボス小があるその中に埋め込みブッシュ小が挿入されている。  The chainring main body according to claim 2 is an aluminum die-casting product. The chainring is fixed to the chainring main body with a nut with a bolt, the boss is large at the center of the chainring main body, and the principle of outer lever is applied from the center. There is a small outer boss at a position where the distance is possible, and a small embedded bush is inserted therein. 請求項３記載の埋め込みブッシュ小に連結ネジ付きボルトを挿入して片方向のネジ部を右側クランクの外ネジ穴に締め付けて固定する、右ペダルの右側クランクは外テコとなり、左ペダルの左側クランクは内テコとなる、回転することによって回転テコ構造となる。  A bolt with a connecting screw is inserted into the small embedded bushing according to claim 3 and a screw part in one direction is fastened and fixed to an outer screw hole of the right crank. The right crank of the right pedal is an outer lever, and the left crank of the left pedal Becomes an inner lever. By rotating, it becomes a rotating lever structure.
JP2008208773A 2008-07-16 2008-07-16 Bicycle propulsion device and bicycle Expired - Fee Related JP4999011B2 (en)

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JP4999011B2 JP4999011B2 (en) 2012-08-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013095412A (en) * 2011-10-31 2013-05-20 Toshio Suzuki Change of bicycle crankshaft and improvement of shell

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104176190A (en) * 2013-05-23 2014-12-03 捷安特（昆山）有限公司 Waterproof mechanism for spindle of bicycle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5312159U (en) * 1976-07-15 1978-02-01
JPS53108054U (en) * 1977-02-05 1978-08-30
JPS54183860U (en) * 1978-06-16 1979-12-26
JPS5949590U (en) * 1982-09-24 1984-04-02 打本　友二 bicycle crankshaft
JPS59146286U (en) * 1983-03-23 1984-09-29 栄輪業株式会社 bicycle crank
JPS6260493U (en) * 1985-10-05 1987-04-15

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5312159U (en) * 1976-07-15 1978-02-01
JPS53108054U (en) * 1977-02-05 1978-08-30
JPS54183860U (en) * 1978-06-16 1979-12-26
JPS5949590U (en) * 1982-09-24 1984-04-02 打本　友二 bicycle crankshaft
JPS59146286U (en) * 1983-03-23 1984-09-29 栄輪業株式会社 bicycle crank
JPS6260493U (en) * 1985-10-05 1987-04-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013095412A (en) * 2011-10-31 2013-05-20 Toshio Suzuki Change of bicycle crankshaft and improvement of shell

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