JP3856502B2

JP3856502B2 - RC model chassis

Info

Publication number: JP3856502B2
Application number: JP24383696A
Authority: JP
Inventors: 滋川田
Original assignee: 株式会社川田模型
Priority date: 1996-09-13
Filing date: 1996-09-13
Publication date: 2006-12-13
Anticipated expiration: 2016-09-13
Also published as: JPH1085463A

Description

【０００１】
【発明の属する技術分野】
本発明は、ラジコン模型用のシャーシに関し、特に、プラスチック製模型自動車（いわゆるプラモデルカー）をラジコン模型として使用できるシャーシに関するものである。
【０００２】
【従来の技術】
従来より、ラジコン模型は、一台につき一体のシャーシが組み込まれており、ボディの交換をすることは予定されておらず、しかも、プラモデルカーとは大きさが異なるため、通常のラジコン模型用のシャーシにプラモデルカーのボディを載せることはできなかった。
【０００３】
その理由としては、ラジコン模型に限らずプラモデルカーもボディの大きさが様々であるため、同一のシャーシがこれらのボディに合致しないことが挙げられるとともに、ラジコン模型のボディとプラモデルカーのボディとは強度がことなり、ラジコン模型と同じ条件でプラモデルカーを走行させるときには、衝突の際にプラモデルカーのボディが容易に破損することが予想されるからであった。
【０００４】
【発明が解決しようとする課題】
しかしながら、周知のとおり、ラジコン模型は完成された模型を遠隔操作することによって楽しむものであり、一方、プラモデルカーは部品を組み合わせて制作することによって楽しむものであるところ、制作したプラモデルカーをラジコン模型のように遠隔操作によって走行させて楽しむことは予定されていないが、プラモデルファンからは、時間をかけて制作したプラモデルカーの遠隔操作による走行を可能にすることが切望されていた。
【０００５】
本発明は、上記諸点にかんがみ、制作したプラモデルカーをラジコン模型として遠隔操作で走行させることができるように、プラモデルカーのボディに合わせて大きさの変化できるシャーシを提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明は、一端に一方の後輪を連結し回転させる駆動軸と、この駆動軸の他端に連結しつつ駆動モータの回転力が伝達されるとともに他方の後輪に連結される伝達部と、この伝達部のうち他方の後輪に対向する表面に設けられた複数の嵌合凹部と、この嵌合凹部に嵌合できる第一の嵌合突起を有する後輪用のホイールと、この後輪用のホイールと上記伝達部との中間に介在されて、伝達部の駆動力を他方の後輪に伝達する中間部材とを備え、上記伝達部の複数の嵌合凹部は、上記伝達部の表面中央を中心とする単一の円周上を中心角４５度のピッチで配置された８個の嵌合凹部であり、上記中間部材は、片面に上記伝達部の嵌合凹部に嵌合できる第二の嵌合突起を有するとともに、他面から上記後輪用のホイールを取り付けるために該ホイールの第一の嵌合突起が嵌合できる嵌合孔を設けてなる中間部材であり、上記第二の嵌合突起は、上記中間部材を回転させるときの回転中心を中心として上記嵌合凹部が配置された円と同じ径の円周上を中心角９０度のピッチで配置された４個の第二の嵌合突起であり、上記嵌合孔は、上記第二の嵌合突起が設けられる位置から上記円周上を中心角４５度回転した位置に配設された４個の嵌合孔であることを特徴とするラジコン模型用シャーシを要旨とする。
【０００７】
また、本発明は、前輪ステアリングモータを搭載する前部シャーシと、バッテリ及び後輪駆動用モータを搭載する後部シャーシとからなり、前部シャーシの側部に設けられたレール部と、このレール部内に設けられた被係合手段と、後部シャーシから突出して上記レール部内に嵌合する嵌合部材と、この嵌合部材に突設されて上記被係合手段に係合できる係合突起とを備え、一端に一方の後輪を連結し回転させる駆動軸と、この駆動軸の他端に連結しつつ駆動モータの回転力が伝達されるとともに他方の後輪に連結される伝達部と、この伝達部のうち他方の後輪に対向する表面に設けられた複数の嵌合凹部と、この嵌合凹部に嵌合できる第一の嵌合突起を有する後輪用のホイールと、この後輪用のホイールと上記伝達部との中間に介在されて、伝達部の駆動力を他方の後輪に伝達する中間部材とを備え、上記伝達部の複数の嵌合凹部は、上記伝達部の表面中央を中心とする単一の円周上を中心角４５度のピッチで配置された８個の嵌合凹部であり、上記中間部材は、片面に上記伝達部の嵌合凹部に嵌合できる第二の嵌合突起を有するとともに、他面から上記後輪用のホイールを取り付けるために該ホイールの第一の嵌合突起が嵌合できる嵌合孔を設けてなる中間部材であり、上記第二の嵌合突起は、上記中間部材を回転させるときの回転中心を中心として上記嵌合凹部が配置された円と同じ径の円周上を中心角９０度のピッチで配置された４個の第二の嵌合突起であり、上記嵌合孔は、上記第二の嵌合突起が設けられる位置から上記円周上を中心角４５度回転した位置に配設された４個の嵌合孔であることを特徴とするラジコン模型用シャーシをも要旨としている。
【０００８】
さらに、本発明は、前輪を支持する支持部と、この支持部の本体部分が収容できる溝部分と、この溝部分の側面に設けられた被係合手段と、上記支持部の本体部分に突設されて溝部分の被係合手段に係合できる係合突起とを備え、一端に一方の後輪を連結し回転させる駆動軸と、この駆動軸の他端に連結しつつ駆動モータの回転力が伝達されるとともに他方の後輪に連結される伝達部と、この伝達部のうち他方の後輪に対向する表面に設けられた複数の嵌合凹部と、この嵌合凹部に嵌合できる第一の嵌合突起を有する後輪用のホイールと、この後輪用のホイールと上記伝達部との中間に介在されて、伝達部の駆動力を他方の後輪に伝達する中間部材とを備え、上記伝達部の複数の嵌合凹部は、上記伝達部の表面中央を中心とする単一の円周上を中心角４５度のピッチで配置された８個の嵌合凹部であり、上記中間部材は、片面に上記伝達部の嵌合凹部に嵌合できる第二の嵌合突起を有するとともに、他面から上記後輪用のホイールを取り付けるために該ホイールの第一の嵌合突起が嵌合できる嵌合孔を設けてなる中間部材であり、上記第二の嵌合突起は、上記中間部材を回転させるときの回転中心を中心として上記嵌合凹部が配置された円と同じ径の円周上を中心角９０度のピッチで配置された４個の第二の嵌合突起であり、上記嵌合孔は、上記第二の嵌合突起が設けられる位置から上記円周上を中心角４５度回転した位置に配設された４個の嵌合孔であることを特徴とするラジコン模型用シャーシを要旨としている。
【０００９】
また、本発明は、前輪ステアリングモータを搭載する前部シャーシと、バッテリ及び後輪駆動用モータを搭載する後部シャーシとからなり、前部シャーシの側部に設けられたレール部と、このレール部内に設けられた第一の被係合手段と、後部シャーシから突出して上記レール部内に嵌合する嵌合部材と、この嵌合部材に突設されて上記第一の被係合手段に係合できる第一の係合突起とを備え、前輪を支持する支持部と、この支持部の本体部分が収容できる溝部分と、この溝部分の側面に設けられた第二の被係合手段と、上記支持部の本体部分に突設されて溝部分の第二の被係合手段に係合できる第二の係合突起とを備え、一端に一方の後輪を連結し回転させる駆動軸と、この駆動軸の他端に連結しつつ駆動モータの回転力が伝達されるとともに他方の後輪に連結される伝達部と、この伝達部のうち他方の後輪に対向する表面に設けられた複数の嵌合凹部と、この嵌合凹部に嵌合できる第一の嵌合突起を有する後輪用のホイールと、この後輪用のホイールと上記伝達部との中間に介在されて、伝達部の駆動力を他方の後輪に伝達する中間部材とを備え、上記伝達部の複数の嵌合凹部は、上記伝達部の表面中央を中心とする単一の円周上を中心角４５度のピッチで配置された８個の嵌合凹部であり、上記中間部材は、片面に上記伝達部の嵌合凹部に嵌合できる第二の嵌合突起を有するとともに、他面から上記後輪用のホイールを取り付けるために該ホイールの第一の嵌合突起が嵌合できる嵌合孔を設けてなる中間部材であり、上記第二の嵌合突起は、上記中間部材を回転させるときの回転中心を中心として上記嵌合凹部が配置された円と同じ径の円周上を中心角９０度のピッチで配置された４個の第二の嵌合突起であり、上記嵌合孔は、上記第二の嵌合突起が設けられる位置から上記円周上を中心角４５度回転した位置に配設された４個の嵌合孔であることを特徴とするラジコン模型用シャーシを要旨とする。
【００１１】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。図１に示すように、本実施形態のラジコン模型用のシャーシ１は、プラモデルカーのボディ７０を乗せることができる程度の大きさに構成されていて、さらに長さの微妙な調整は、縦方向調整部２ａ，２ｂにより、前輪３ａ，３ｂを支持すべき位置の調整は、横方向調整部４ａ，４ｂにより、それぞれ可能に構成する。また、後輪５ａ，５ｂの位置に関しては、駆動軸６を交換することのほか、後輪の設置場所を変更できるように構成するとともに、駆動力の伝達させる伝達部と後輪との間にスペーサを設けるように構成されている。このように、これらの各寸法を変化させることによれば、シャーシ１の全体の大きさを変更させることができ、種々の異なるボディを載せることができるのである。また、シャーシ１は、前側を構成する前部シャーシ２０と、後側を構成する後部シャーシ３０とに分離しており、前部シャーシ２０には、前輪３ａ，３ｂの角度を変化させるカントサーボモータを搭載するためのスペース７が、後部シャーシ３０には後輪５ａ，５ｂを駆動するモータを搭載するためのスペース８と、バッテリが搭載できるだけのスペース９とが設けられ、走行時には所定のスペース７，８，９に各装置が配設することによって、前部シャーシ２０と後部シャーシ３０との重量のバランスを良くしている。さらに、シャーシ１の前端にバンパー１０が設けられており、走行時に衝突した際、その衝撃からシャーシを保護するとともに、ひいてはボディを保護することができるようになっているのである。
【００１２】
次に、縦方向調整部２ａ，２ｂの詳細を説明する。なお、シャーシ１の両側において同一の構造であるので、一方のみを中心に説明する。図２に示すように、前部シャーシ２０の両側にはシャーシ１の前後方向に延びるレール部２１ｂが設けられており、このレール部２１ｂの内部は、長手方向に沿った溝状に構成されており、このレール部２１ｂの溝状内部には、後部シャーシ３０から突出する嵌合部材３１ｂが嵌合できるようになっている。さらに、この溝状内部の片方も側面は歯形に成形され、被係合部２２ｂが構成されている。一方、嵌合部材３１ｂのうち被係合部２２ｂに当接する側面には、山形の係合突起３２ｂが設けられていて、レール部２１ｂ内に嵌合部材３１ｂを嵌入するとき、この係合突起３２ｂが被係合部２２ｂのいずれかの谷部分に係合できるようになっている。また、レール部２１ｂの内部において構成されている溝状部分の底面には、長手方向に沿って貫通する長穴２３が設けられ、一方、嵌合部材３１ｂの適宜箇所には、貫通孔３３が設けられており、前記のように嵌合した状態で、ネジ３５を挿通することができるようになっている。従って、このネジ３５を挿通することによって、嵌合部材３１ｂをレール部２１ａ，２１ｂ内部に嵌合する位置が確定し、この状態でナット３６を締めつけることによって固定することができるのである。
【００１３】
従って、嵌合部材３１ｂは、側面に設けた山形の係合突起３２ｂが、レール部２１ｂの被係合部２２ｂに係合させるとき、歯形の１個単位で段階的に調整することができるものである。そして、調整された状態においてネジ３５及びナット３６によって、嵌合する位置を変化させずにしっかり鋲着できるのである。
次に、横方向調整部４ａ，４ｂの詳細を説明する。図３に示すように、この横方向調整部４ａ，４ｂは、前輪３ａ，３ｂ（図１）の幅を増減させるためのものであることから、前輪３ａ，３ｂを支持するための支持部４１ａ，４１ｂが設けられている。そして、この支持部４１ａ，４１ｂは、前輪３ａ，３ｂのホイールに接続する部分４２ａ，４２ｂと、シャーシ１に連結される本体部分４３ａ，４３ｂとで構成され、ホイール接続部分４２ａ，４２ｂには、さらにカントサーボモータ（図示せず）に接続されるカント調整バー（図示せず）が設けられ、このサーボモータの作動によってカント角が操作できるようになっている。また、シャーシ１１表面のうち、支持部４１ａ，４１ｂの本体部分４３ａ，４３ｂを連結すべき箇所には、当該本体部分４３ａ，４３ｂが収容できる溝部分４５ａ，４５ｂが構成されていて、さらに、この溝部分４５ａ，４５ｂの内側面には歯形の被係合部４６ａ，４６ｂが構成されている。そして、この内側面に当接する本体部分４３ａ，４３ｂの両側には、同じ歯形の係合突起４７ａ，４７ｂが構成されていて、この係合突起４７ａ，４７ｂを被係合部４６ａ，４６ｂに係合させるようにしつつ、本体部分４３ａ，４３ｂを溝部分４５ａ，４５ｂ内に収容させるように構成されている。また、溝部分４５ａ，４５ｂの底面には、その手方向に沿った長穴４８ａ，４８ｂが設けられ、本体部分４３ａ，４３ｂには単一の貫通孔４９ａ，４９ｂが設けられていて、前記縦方向調整部３ａ，３ｂと同様に、調整された状態の本体部分４３ａ，４３ｂと溝部分４５ａ，４５ｂとをネジ３７ａ，３７ｂとナット３８ａ，３８ｂによって鋲着できるように構成されている。
【００１４】
次に、後輪位置の調整について説明する。まず、一方の後輪５ｂにおいては、後部シャーシ３０に搭載される駆動モータ（図示せず）からの回転力が伝達される伝達部５１と一方の後輪５ｂとの間において調整するものである（図１参照）。即ち、図４に示すように、伝達部５１の表面には複数の嵌合凹部５２，５３が設けられており、この伝達部５１と後輪５ｂとの間には板状の中間部材５４が用意され、この中間部材５４の表面（図中右側表面）には上記嵌合凹部５２，５３に嵌合する第二の嵌合突起５５が突設されている。従って、第二の嵌合突起５５を所定の嵌合凹部５２に嵌合させることによって、この中間部材５４を伝達部５１の表面に取り付けることができるようになっているのである。さらに、この中間部材５４の他方表面（図中左側表面）には、前記の中間部材５４に設けた嵌合凹部５２と同一形状の貫通した嵌合孔５６が穿設されていて、一方、後輪５ｂを装着しているホイール５７には、この嵌合孔５６に嵌合できるように第一の嵌合突起５８が設けられており、この中間部材５４の嵌合孔５６内に第一の嵌合突起５８を嵌合させて取り付けることができる。このようにして、後輪５ｂは、中間部材５４及びホイール５７を介して、伝達部５１の回転力を伝えられるのである。上記のような構成であるので、中間部材５４を取り除くことによって、ホイール５７を伝達部５１に直接に取り付けることもでき、それによって、伝達部５１からホイール５７までの距離を変化させることができる。また、肉厚を変化させた種々の中間部材５４を用意すれば、中間部材５４を変更することによって伝達部５１からホイール５７までの距離を変えることができる。なお、中間部材５４に設ける嵌合孔５６は、ホイール５７の嵌合突起５８が、中間部材５４の肉厚に関係なく嵌合できるように構成したものであり、十分に嵌合できる肉厚を有する中間部材５４であれば、貫通させなくてもよいものである。また、このようにホイール５７の嵌合突起（第一の嵌合突起）５８が嵌合孔５６を通過して、伝達部５１に当接しないような構成とするために、伝達部５１の表面には８個の嵌合凹部５２が設けられるのに対し、中間部材５４には４個の第二の嵌合突起５５が設けられており、中間部材５４を伝達部５１に取り付けたとき、伝達部５１には、中間部材５４の嵌合突起（第二の嵌合突起）５５が嵌合した嵌合凹部５２のほかに、嵌合凹部５３が残余することとなっている。そして、中間部材５４の嵌合孔５６に嵌合する第一の嵌合突起５５の先端が伝達部５１の嵌合凹部５２に嵌り込むこととなり、伝達部５１との当接を回避することとなる。その際、伝達部５１に設けられる８個の嵌合凹部５２・・・は、当該嵌合凹部５２・・・が設けられる伝達部５１の表面の中央を中心とする円周上に中心角が４５度のピッチで設けられ、中間部材５４及びホイール５７の嵌合突起５５，５８は、それぞれの表面において上記と同じ径の円周上に中心角が９０度のピッチで４個だけ設けるようにすることが考えられる。また、嵌合凹部５２，５３及び嵌合孔５６に、それぞれ嵌合突起５５，５８を嵌合させた状態で、ホイール５７が離脱しないように、伝達部５１の内部を貫通している取付軸５９の先端に、ナット６０を螺合されている。この取付軸５９の先端の雄ネジ部分は、ナット６０の厚みよりも長く刻設されており、ホイール５７が最も伝達部５１に近接するとき、取付軸５９の先端がナット６０から突出できるようになっている。そして、ナット６０から取付軸５９の先端が突出するときには、図示するように、ホイール５７の空洞内に納まるように構成されている。なお、中間部材５４による微調整を越えて後輪５ｂの位置を調整するときには、長さの異なる取付軸５９に交換することもできる。
【００１５】
他方の後輪５ａにおいては、図５に示すように、後輪５ｂを装着しているホイール（図示せず）と、前記伝達部５１（図１）から回転力が伝えられる駆動軸６１との間を連結する連結部材６２が設けられており、駆動軸６１の先端が、この連結部材６２の内部に挿入できるとともに、その挿入した状態で鋲着できる構造になっているのである。従って、駆動軸６１の先端部分を連結部材６２に挿入して、後輪５ａの位置を調整した状態で、ネジ部材６３を締めつけることにより、駆動軸６１と後輪５ａが強固に連結できるのである。
【００１６】
なお、本発明の趣旨を逸脱しない範囲において、種々なる実施の態様をとることができることは無論である。
【００１７】
【発明の効果】
以上のように、本発明によれば、レール部内に嵌合部材を嵌合させることによって、前部シャーシと後部シャーシが連続することとなり、しかも、レール部内の被係合手段に嵌合部材の係止突起を係入させることによって、前部シャーシと後部シャーシとを一体化することができる。このとき、係止突起は被係入手段の範囲内において任意の位置に係入可能であって、この係入位置を変更することによって、レール部と嵌合部材との重なる範囲が異なることとなり、よってシャーシ全体の長さを変更できるのである。
【００１８】
そして、前記レールが、長手方向に沿った長穴を有するレールであって、前記嵌合部材が、鋲着のための貫通孔を有する嵌合部材であることによれば、重なったレール部と嵌合部材とを強固に固定することができ、ラジコン模型として使用する際の走行に十分耐えることができる。また、ネジなどによる締着の方法によれば、ドライバーによって簡単に固定及びその解除ができることとなる。
【００１９】
また、本発明によれば、支持部の本体部分を収容する溝部分に沿って、当該本体部分の収容位置を移動できるのであるから、前輪を支持している支持部の本体部分をシャーシの中央に寄せて、又は、中央から離して取り付けることができ、両方の前輪間の幅を広く又は狭くすることができる。そして、その際、溝部分の被係合手段に係合突起を係合させることによって、支持部の本体部分を収容する位置を確定的なものにすることができる。
【００２０】
そして、前記溝部分が、長手方向に沿った長穴を底面に有する溝部分であって、前記支持部の本体部分が、鋲着のための貫通孔を有する支持部の本体部分であれば、支持部の本体部分とシャーシの溝部材とを貫通しながら鋲着できるので、支持部はシャーシに強固に固定されることとなる。
【００２１】
さらに、本発明によれば、駆動モータから伝達される伝達部の回転力は、一方の後輪に対しては駆動軸によって駆動力が伝達されるものの、他方の後輪に対しては駆動軸によらずに嵌合突起によって中間部材を介して後輪に伝達されることとなる。従って、当該後輪に対する駆動力は駆動軸によって伝達しないことから、駆動軸の長さを変化することなく伝達部と後輪との間隔を変化させることも可能となるのである。そして、前記中間部材が、嵌合突起を有する側の反対に、伝達部と同じ係入凹部を有する中間部材であり、複数の中間部材を重ねて使用できるように構成すれば、伝達部と後輪との間に重ねて嵌合する中間部材をスペーサとして作用させることができる。また、本発明によれば、中間部材を重ねて嵌合したとき、一方の中間部材の嵌合凹部に嵌合させた他方の中間部材の嵌合突起は、一方の中間部材の嵌合突起と４５度だけ回転した状態となる。即ち、嵌合凹部を貫通した孔にしたとすれば、他方の中間部材の嵌合突起は、貫通した孔を通過して伝達部に到達することになる。その場合、伝達部には４５度の角度を有する嵌合凹部が設けられているので、他方の嵌合突起は、一方の嵌合突起が嵌合していない残余の嵌合凹部に挿入されることとなるのである。また、この伝達部に設ける嵌合凹部の深さを異ならせれば、同一の中間部材の嵌合突起を嵌合させるべき嵌合凹部をかえることによっても、伝達部と後輪との間隙を変化させることもできる。
【００２２】
しかも、上記各構成要素を全て備えたものであれば、シャーシの前後方向の長さを変化でき、前輪の間の幅を広く又は狭くすることができ、さらに、後輪の間の幅をも変化できるので、様々な種類のボディであっても乗せることができる程度にシャーシの大きさを調整できることとなる。
なお、本発明の趣旨を逸脱しない範囲において、種々なる実施の態様をとることができることは無論である。例えば、駆動モータからの駆動力を伝達される伝達部５１は、通常はデファレンシャルであるが、デファレンシャルであっても簡易な平歯車であっても同様である。
【図面の簡単な説明】
【図１】ラジコン模型のシャーシを中心とした平面図である。
【図２】縦方向調整部の詳細を示す説明図である。
【図３】横方向調整部の詳細を示す説明図である。
【図４】後輪の位置の調整構造を示す説明図である。
【図５】他方の後輪の位置の調整構造を示す説明図である。
【符号の説明】
１シャーシ
２ａ，２ｂ縦方向スライド
３ａ，３ｂ前輪
４ａ，４ｂ横方向スライド
５ａ，５ｂ後輪
６駆動軸
１０バンパー
２０前部シャーシ
２１ａ，２１ｂレール部
２２ａ，２２ｂ被係合部
２３長穴
３０後部シャーシ
３１ａ，３１ｂ嵌合部材
３２ａ，３２ｂ係合突起
３３，３４貫通孔
４１ａ，４１ｂ支持部
４３ａ，４３ｂ本体部分
４５ａ，４５ｂ溝部材
４６ａ，４６ｂ被係合部
４７ａ，４７ｂ嵌合突起
４８ａ，４８ｂ長穴
４９ａ，４９ｂ貫通孔
５１伝達部
５２，５３嵌合凹部
５４中間部材
５５，５８嵌合突起
５６嵌合孔
５７ホイール
６０駆動軸[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chassis for a radio control model, and more particularly to a chassis that can use a plastic model car (so-called plastic model car) as a radio control model.
[0002]
[Prior art]
Conventionally, each RC model has a built-in chassis, and there is no plan to replace the body. In addition, because the size of the model is different from that of a plastic model car, The body of a plastic model car could not be placed on the chassis.
[0003]
The reason is that not only the radio control model but also the plastic model car has various body sizes, so the same chassis does not match these bodies, and the radio control model body and the model car body This is because when the plastic model car is run under the same conditions as the radio controlled model, the body of the plastic model car is expected to be easily damaged during a collision.
[0004]
[Problems to be solved by the invention]
However, as is well known, the radio controlled model is enjoyed by remotely operating the completed model, while the plastic model car is enjoyed by combining parts, and the produced model car is like a radio controlled model. Although it is not planned to be enjoyed by driving remotely, plastic model fans have been anxious to enable remote control of a model car that they have made over time.
[0005]
In view of the above points, an object of the present invention is to provide a chassis whose size can be changed according to the body of a plastic model car so that the produced plastic model car can be remotely controlled as a radio controlled model.
[0006]
[Means for Solving the Problems]
The present invention includes a drive shaft that connects and rotates one rear wheel at one end, and a transmission unit that transmits the rotational force of the drive motor while being connected to the other end of the drive shaft and is connected to the other rear wheel. A wheel for a rear wheel having a plurality of fitting recesses provided on the surface of the transmission portion facing the other rear wheel, a first fitting protrusion that can be fitted into the fitting recess, and the rear wheel An intermediate member that is interposed between the wheel for the wheel and the transmission unit and transmits the driving force of the transmission unit to the other rear wheel, and the plurality of fitting recesses of the transmission unit include 8 fitting recesses arranged on a single circumference centered on the center of the surface at a pitch of 45 degrees, and the intermediate member can be fitted into the fitting recess of the transmission portion on one side. The wheel has a second fitting projection and is used to attach the wheel for the rear wheel from the other side. Of a first intermediate member fitting projection is provided with a fitting hole capable of fitting, the second fitting projection is the above fitting recess around the rotation center when rotating the intermediate member Four second fitting protrusions arranged at a pitch of a central angle of 90 degrees on a circumference having the same diameter as the arranged circle, and the fitting hole is provided with the second fitting protrusion. The gist is a radio control model chassis characterized by four fitting holes arranged at a position rotated by a central angle of 45 degrees on the circumference from the position .
[0007]
The present invention also includes a front chassis on which a front wheel steering motor is mounted, a rear chassis on which a battery and a motor for driving rear wheels are mounted, a rail portion provided on a side portion of the front chassis, Engaging means provided on the fitting, a fitting member that protrudes from the rear chassis and fits into the rail portion, and an engaging protrusion that projects from the fitting member and can be engaged with the engaged means. A drive shaft that connects one rear wheel to one end and rotates, a transmission unit that transmits the rotational force of the drive motor while being connected to the other end of the drive shaft, and is connected to the other rear wheel, A wheel for a rear wheel having a plurality of fitting recesses provided on the surface of the transmission portion facing the other rear wheel, a first fitting protrusion that can be fitted in the fitting recess, and for the rear wheel Between the wheel and the transmission part And an intermediate member for transmitting the driving force of the transfer portion to the other rear wheel, a plurality of fitting recesses of the transmission portion, center angle 45 on the single circumference around the center of the front side of the transfer unit and eight of the fitting recess arranged at a pitch of degrees, the intermediate member, and having a second fitting projection which can be fitted into the fitting recess of the transfer unit on one side, the rear wheel from the other side An intermediate member provided with a fitting hole in which the first fitting protrusion of the wheel can be fitted to attach a wheel for use, and the second fitting protrusion is rotated when the intermediate member is rotated. Four second fitting protrusions arranged at a pitch of a central angle of 90 degrees on the circumference having the same diameter as the circle in which the fitting concave portion is arranged around the center, and the fitting holes are Arranged at a position rotated 45 degrees on the circumference from the position where the second fitting protrusion is provided Are the subject matter also wireless remote-control model chassis, which is a number of fitting holes.
[0008]
Furthermore, the present invention provides a support portion that supports the front wheel, a groove portion that can accommodate the main body portion of the support portion, an engaged means provided on a side surface of the groove portion, and a main body portion of the support portion. A drive shaft that is provided with an engagement protrusion that can be engaged with the engaged means of the groove portion, and that connects one rear wheel to one end and rotates the drive shaft while being connected to the other end of the drive shaft. A transmission portion that transmits force and is coupled to the other rear wheel, a plurality of fitting recesses provided on a surface of the transmission portion that faces the other rear wheel, and the fitting recess can be fitted. A wheel for a rear wheel having a first fitting protrusion, and an intermediate member interposed between the wheel for the rear wheel and the transmission portion to transmit the driving force of the transmission portion to the other rear wheel. comprising, a plurality of fitting recesses of the transfer section, on a single circumference around the center of the front side of the transfer unit And eight of the fitting recess arranged at a pitch of central angle of 45 degrees, the intermediate member, and having a second fitting projection which can be fitted into the fitting recess of the transfer unit on one side, from the other surface In order to attach the wheel for the rear wheel, it is an intermediate member provided with a fitting hole into which the first fitting protrusion of the wheel can be fitted, and the second fitting protrusion rotates the intermediate member. Four second fitting protrusions arranged at a pitch of a central angle of 90 degrees on the circumference of the same diameter as the circle in which the fitting concave portion is arranged around the rotation center. Is a radio controlled model chassis characterized by four fitting holes arranged at a position rotated 45 degrees on the circumference from the position where the second fitting protrusion is provided. It is said.
[0009]
The present invention also includes a front chassis on which a front wheel steering motor is mounted, a rear chassis on which a battery and a motor for driving rear wheels are mounted, a rail portion provided on a side portion of the front chassis, A first engaged means provided on the fitting, a fitting member protruding from the rear chassis and fitting into the rail portion, and protruding from the fitting member to engage with the first engaged means. A first engaging protrusion capable of supporting the front wheel, a groove portion capable of accommodating the main body portion of the supporting portion, and a second engaged means provided on a side surface of the groove portion, A drive shaft that protrudes from the main body portion of the support portion and can be engaged with the second engaged means of the groove portion, and connects and rotates one rear wheel at one end; When the rotational force of the drive motor is transmitted while being connected to the other end of the drive shaft A transmission portion coupled to the other rear wheel, a plurality of fitting recesses provided on a surface of the transmission portion facing the other rear wheel, and a first fitting that can be fitted into the fitting recess. A wheel for a rear wheel having a protrusion, and an intermediate member that is interposed between the wheel for the rear wheel and the transmission unit and transmits the driving force of the transmission unit to the other rear wheel, and the transmission unit The plurality of fitting recesses are eight fitting recesses arranged at a pitch of a central angle of 45 degrees on a single circumference centered on the center of the surface of the transmission portion, and the intermediate member is formed on one side. A second fitting projection that can be fitted in the fitting recess of the transmission portion, and a fitting that can be fitted with the first fitting projection of the wheel for attaching the wheel for the rear wheel from the other surface. an intermediate member formed by providing a hole, the second mating protrusion, when rotating the intermediate member Four second fitting protrusions arranged at a central angle of 90 degrees on the circumference of the same diameter as the circle in which the fitting concave portion is arranged around the rolling center, and the fitting hole is A radio control model chassis comprising four fitting holes arranged at a position rotated by a central angle of 45 degrees on the circumference from a position at which the second fitting protrusion is provided. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the chassis 1 for the radio control model of the present embodiment is configured to have a size that allows the body 70 of the plastic model car to be placed thereon. Adjustment of the position at which the front wheels 3a and 3b should be supported by the adjusting units 2a and 2b is configured by the horizontal adjusting units 4a and 4b, respectively. As for the positions of the rear wheels 5a and 5b, in addition to exchanging the drive shaft 6, the rear wheel installation location can be changed, and the drive force can be transmitted between the transmission and the rear wheel. A spacer is provided. Thus, by changing these dimensions, the overall size of the chassis 1 can be changed, and various different bodies can be mounted. The chassis 1 is separated into a front chassis 20 constituting the front side and a rear chassis 30 constituting the rear side. The front chassis 20 has a cant servo motor that changes the angles of the front wheels 3a and 3b. The rear chassis 30 is provided with a space 8 for mounting a motor for driving the rear wheels 5a and 5b, and a space 9 for mounting a battery. , 8 and 9, the balance of the weight of the front chassis 20 and the rear chassis 30 is improved. Further, a bumper 10 is provided at the front end of the chassis 1, so that when the vehicle collides during traveling, the chassis can be protected from the impact and the body can be protected.
[0012]
Next, details of the vertical direction adjustment units 2a and 2b will be described. In addition, since it is the same structure in the both sides of the chassis 1, it demonstrates focusing on only one side. As shown in FIG. 2, rail portions 21b extending in the front-rear direction of the chassis 1 are provided on both sides of the front chassis 20, and the inside of the rail portion 21b is formed in a groove shape along the longitudinal direction. In addition, a fitting member 31b protruding from the rear chassis 30 can be fitted into the groove-shaped inside of the rail portion 21b. Furthermore, one side of the inside of the groove shape is formed into a tooth shape to constitute an engaged portion 22b. On the other hand, a chevron-shaped engaging protrusion 32b is provided on the side surface of the engaging member 31b that contacts the engaged part 22b. When the engaging member 31b is inserted into the rail part 21b, the engaging protrusion 31b is provided. 32b can be engaged with any valley portion of the engaged portion 22b. In addition, a slot 23 penetrating along the longitudinal direction is provided on the bottom surface of the groove-shaped portion formed inside the rail portion 21b. On the other hand, a through hole 33 is provided at an appropriate position of the fitting member 31b. It is provided, and the screw 35 can be inserted in the fitted state as described above. Therefore, by inserting the screw 35, the position where the fitting member 31b is fitted into the rail portions 21a and 21b is determined, and in this state, the nut 36 can be fastened and fixed.
[0013]
Therefore, the fitting member 31b can be adjusted step by step in the unit of the tooth profile when the mountain-shaped engaging protrusion 32b provided on the side surface is engaged with the engaged portion 22b of the rail portion 21b. It is. Then, in the adjusted state, the screw 35 and the nut 36 can be firmly attached without changing the fitting position.
Next, details of the horizontal direction adjustment units 4a and 4b will be described. As shown in FIG. 3, the lateral adjustment portions 4a and 4b are for increasing and decreasing the widths of the front wheels 3a and 3b (FIG. 1), and therefore support portions 41a for supporting the front wheels 3a and 3b. , 41b are provided. And these support parts 41a and 41b are comprised by the parts 42a and 42b connected to the wheel of the front wheels 3a and 3b, and the main-body parts 43a and 43b connected with the chassis 1, and the wheel connection parts 42a and 42b include Further, a cant adjustment bar (not shown) connected to a cant servo motor (not shown) is provided, and the cant angle can be operated by the operation of the servo motor. Further, on the surface of the chassis 11, groove portions 45 a and 45 b that can accommodate the main body portions 43 a and 43 b are formed at locations where the main body portions 43 a and 43 b of the support portions 41 a and 41 b are to be connected. Tooth-shaped engaged portions 46a and 46b are formed on the inner side surfaces of the groove portions 45a and 45b. Further, engaging projections 47a and 47b having the same tooth shape are formed on both sides of the main body portions 43a and 43b contacting the inner surface, and the engaging projections 47a and 47b are engaged with the engaged portions 46a and 46b. The main body portions 43a and 43b are configured to be accommodated in the groove portions 45a and 45b while being combined. The bottom surfaces of the groove portions 45a and 45b are provided with elongated holes 48a and 48b along the hand direction, and the main body portions 43a and 43b are provided with single through holes 49a and 49b. Similarly to the direction adjusting portions 3a and 3b, the main body portions 43a and 43b and the groove portions 45a and 45b in an adjusted state can be attached by screws 37a and 37b and nuts 38a and 38b.
[0014]
Next, adjustment of the rear wheel position will be described. First, in one rear wheel 5b, adjustment is performed between the transmission portion 51 to which the rotational force from a drive motor (not shown) mounted on the rear chassis 30 is transmitted and the one rear wheel 5b. (See FIG. 1). That is, as shown in FIG. 4, a plurality of fitting recesses 52 and 53 are provided on the surface of the transmission portion 51, and a plate-like intermediate member 54 is provided between the transmission portion 51 and the rear wheel 5b. A second fitting projection 55 is provided on the surface of the intermediate member 54 (the right side surface in the drawing) so as to be fitted into the fitting recesses 52 and 53. Therefore, the intermediate member 54 can be attached to the surface of the transmission portion 51 by fitting the second fitting protrusion 55 into the predetermined fitting recess 52. Further, a through-fitting hole 56 having the same shape as the fitting recess 52 provided in the intermediate member 54 is formed on the other surface (the left surface in the figure) of the intermediate member 54. The wheel 57 to which the wheel 5b is attached is provided with a first fitting protrusion 58 so that the wheel 57 can be fitted into the fitting hole 56, and the first fitting projection 58 is provided in the fitting hole 56 of the intermediate member 54 . The fitting protrusion 58 can be fitted and attached. In this way, the rear wheel 5 b can transmit the rotational force of the transmission portion 51 via the intermediate member 54 and the wheel 57. Since it is the above structure, the wheel 57 can also be directly attached to the transmission part 51 by removing the intermediate member 54, and thereby the distance from the transmission part 51 to the wheel 57 can be changed. In addition, if various intermediate members 54 having different thicknesses are prepared, the distance from the transmission unit 51 to the wheel 57 can be changed by changing the intermediate member 54. The fitting hole 56 provided in the intermediate member 54 is configured such that the fitting protrusion 58 of the wheel 57 can be fitted regardless of the thickness of the intermediate member 54, and has a thickness that can be sufficiently fitted. If it has the intermediate member 54 which has, it is not necessary to penetrate. The thus fitting protrusion (first fitting projection) 58 of the wheel 57 passes through the fitting hole 56, in order to adopt a configuration so as not to contact the transfer unit 51, the surface of the transfer unit 51 8 is provided with eight fitting recesses 52, whereas the intermediate member 54 is provided with four second fitting projections 55. When the intermediate member 54 is attached to the transmission portion 51, transmission is performed. the unit 51, in addition to the engagement of the intermediate member 54 projecting (second fitting projection) fitting recess 52 55 is fitted, the fitting recess 53 is decided to rest. And the front-end | tip of the 1st fitting protrusion 55 fitted to the fitting hole 56 of the intermediate member 54 will fit in the fitting recessed part 52 of the transmission part 51, and contact with the transmission part 51 is avoided. Become. At that time, the eight fitting recesses 52 provided in the transmission portion 51 have a central angle on the circumference centering on the center of the surface of the transmission portion 51 provided with the fitting recess 52. The intermediate member 54 and the fitting protrusions 55 and 58 of the wheel 57 are provided at a pitch of 45 degrees on the circumference of the same diameter as the above on the respective surfaces so that only four are provided at a pitch of 90 degrees. It is possible to do. In addition, in a state where the fitting protrusions 55 and 58 are fitted in the fitting recesses 52 and 53 and the fitting hole 56, respectively, an attachment shaft that penetrates the inside of the transmission portion 51 so that the wheel 57 does not come off. A nut 60 is screwed onto the tip of 59. The male thread portion at the tip of the mounting shaft 59 is cut longer than the thickness of the nut 60 so that the tip of the mounting shaft 59 can protrude from the nut 60 when the wheel 57 is closest to the transmission portion 51. It has become. And when the front-end | tip of the attachment shaft 59 protrudes from the nut 60, it is comprised so that it may fit in the cavity of the wheel 57 so that it may show in figure. When the position of the rear wheel 5b is adjusted beyond the fine adjustment by the intermediate member 54, it can be replaced with a mounting shaft 59 having a different length.
[0015]
In the other rear wheel 5a, as shown in FIG. 5, a wheel (not shown) on which the rear wheel 5b is mounted and a drive shaft 61 to which the rotational force is transmitted from the transmission portion 51 (FIG. 1). A connecting member 62 is provided to connect them, and the tip of the drive shaft 61 can be inserted into the connecting member 62 and can be attached in the inserted state. Therefore, the drive shaft 61 and the rear wheel 5a can be firmly connected by inserting the front end portion of the drive shaft 61 into the connecting member 62 and tightening the screw member 63 with the position of the rear wheel 5a adjusted. .
[0016]
Of course, various embodiments can be employed without departing from the spirit of the present invention.
[0017]
【The invention's effect】
As described above , according to the present invention, by engaging the fitting member in the rail portion, the front chassis and the rear chassis are continuous, and the engagement member in the rail portion is connected to the engaged member. By engaging the locking protrusion, the front chassis and the rear chassis can be integrated. At this time, the locking projection can be engaged at any position within the range of the engaged means, and the overlapping range between the rail portion and the fitting member is different by changing the engagement position. Thus, the length of the entire chassis can be changed.
[0018]
And the rail is a rail having a long hole along the longitudinal direction, and the fitting member is a fitting member having a through hole for attachment, The fitting member can be firmly fixed, and can sufficiently withstand running when used as a radio control model. Further, according to the fastening method using screws or the like, it can be easily fixed and released by a driver.
[0019]
Further , according to the present invention, since the housing position of the main body portion can be moved along the groove portion for housing the main body portion of the support portion, the main body portion of the support portion supporting the front wheel is moved to the center of the chassis. Or can be mounted away from the center and the width between both front wheels can be widened or narrowed. At that time, by engaging the engagement protrusion with the engaged means of the groove portion, the position where the main body portion of the support portion is accommodated can be determined.
[0020]
Then, the groove portion, a long hole along the longitudinal direction a groove portion having a bottom surface, the body portion of the support portion, if the body portion of the support portion having a through hole for rivets wear, since a groove member of the body portion of the support and the chassis can tack wear while penetrating the support portion that Do and be firmly fixed to the chassis.
[0021]
Further, according to the present invention, the rotational force transmitted from the drive motor is transmitted to the one rear wheel by the drive shaft, but to the other rear wheel. Regardless of this, it is transmitted to the rear wheel via the intermediate member by the fitting protrusion. Accordingly, since the driving force for the rear wheel is not transmitted by the driving shaft, the distance between the transmitting portion and the rear wheel can be changed without changing the length of the driving shaft. If the intermediate member is an intermediate member having the same engaging recess as the transmission portion on the opposite side to the side having the fitting protrusion, and configured so that a plurality of intermediate members can be used in an overlapping manner, An intermediate member that is overlapped and fitted between the rings can act as a spacer. According to the present invention, when the intermediate member is overlapped and fitted, the fitting protrusion of the other intermediate member fitted into the fitting recess of the one intermediate member is the same as the fitting protrusion of the one intermediate member. It will be in the state rotated only 45 degree | times. In other words, if the fitting recess is made to be a hole penetrating, the fitting protrusion of the other intermediate member passes through the penetrating hole and reaches the transmitting portion. In that case, since the fitting recess having an angle of 45 degrees is provided in the transmission portion, the other fitting projection is inserted into the remaining fitting recess in which one fitting projection is not fitted. It will be. In addition, if the depth of the fitting recess provided in the transmission portion is changed, the gap between the transmission portion and the rear wheel can be changed by changing the fitting recess in which the fitting protrusion of the same intermediate member should be fitted. It can also be made.
[0022]
Moreover, if all of the above components are provided, the length of the chassis in the front-rear direction can be changed, the width between the front wheels can be increased or decreased, and the width between the rear wheels can be increased. Since it can be changed, the size of the chassis can be adjusted to such an extent that various types of bodies can be mounted.
Of course, various embodiments can be employed without departing from the spirit of the present invention. For example, the transmission unit 51 to which the driving force from the drive motor is transmitted is usually a differential, but the same applies to a differential or a simple spur gear.
[Brief description of the drawings]
FIG. 1 is a plan view centering on a chassis of a radio-controlled model.
FIG. 2 is an explanatory diagram showing details of a vertical adjustment unit.
FIG. 3 is an explanatory diagram showing details of a horizontal adjustment unit.
FIG. 4 is an explanatory diagram showing a structure for adjusting the position of a rear wheel.
FIG. 5 is an explanatory view showing a structure for adjusting the position of the other rear wheel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Chassis 2a, 2b Vertical direction slide 3a, 3b Front wheel 4a, 4b Horizontal direction slide 5a, 5b Rear wheel 6 Drive shaft 10 Bumper 20 Front chassis 21a, 21b Rail part 22a, 22b Engagement part 23 Slot 30 Rear chassis 31a, 31b Fitting members 32a, 32b Engaging projections 33, 34 Through holes 41a, 41b Support portions 43a, 43b Main body portions 45a, 45b Groove members 46a, 46b Engaged portions 47a, 47b Fitting projections 48a, 48b 49a, 49b Through-hole 51 Transmission portion 52, 53 Fitting recess 54 Intermediate member 55, 58 Fitting projection 56 Fitting hole 57 Wheel 60 Drive shaft

Claims

A drive shaft that connects one rear wheel to one end and rotates, a transmission portion that transmits the rotational force of the drive motor while being connected to the other end of the drive shaft, and is connected to the other rear wheel, and this transmission portion A wheel for a rear wheel having a plurality of fitting recesses provided on a surface facing the other rear wheel, a first fitting protrusion that can be fitted into the fitting recess, and a wheel for the rear wheel And an intermediate member that is interposed between the transmission portion and transmits the driving force of the transmission portion to the other rear wheel, and the plurality of fitting recesses of the transmission portion are centered on the center of the surface of the transmission portion. The second fitting that can be fitted into the fitting recess of the transmission portion on one side is eight fitting recesses arranged on a single circumference at a pitch of a central angle of 45 degrees. And a first protrusion of the wheel for attaching the wheel for the rear wheel from the other side. The intermediate member is provided with a fitting hole into which the mating protrusion can be fitted, and the second fitting protrusion includes a circle in which the fitting concave portion is disposed around a rotation center when the intermediate member is rotated. Four second fitting protrusions arranged on the circumference of the same diameter at a pitch of 90 degrees in the central angle, and the fitting hole extends from the position where the second fitting protrusion is provided to the circumference. A radio control model chassis comprising four fitting holes arranged at a position rotated 45 degrees above the central angle.

A front chassis for mounting a front wheel steering motor and a rear chassis for mounting a battery and a rear wheel drive motor. A fitting means, a fitting member that protrudes from the rear chassis and fits into the rail portion, and an engagement protrusion that is projected from the fitting member and can be engaged with the engaged means,
A drive shaft that connects one rear wheel to one end and rotates, a transmission portion that transmits the rotational force of the drive motor while being connected to the other end of the drive shaft, and is connected to the other rear wheel, and this transmission portion A wheel for a rear wheel having a plurality of fitting recesses provided on a surface facing the other rear wheel, a first fitting protrusion that can be fitted in the fitting recess, and a wheel for the rear wheel And an intermediate member that is interposed between the transmission portion and transmits the driving force of the transmission portion to the other rear wheel, and the plurality of fitting recesses of the transmission portion are centered on the center of the surface of the transmission portion. The second fitting that can be fitted into the fitting recess of the transmission portion on one side is eight fitting recesses arranged at a pitch of a central angle of 45 degrees on a single circumference. And a first protrusion of the wheel for attaching the wheel for the rear wheel from the other side. An intermediate member provided with a fitting hole into which the mating projection can be fitted, and the second fitting projection is a circle in which the fitting concave portion is arranged around a rotation center when the intermediate member is rotated. Four second fitting protrusions arranged on the circumference of the same diameter at a pitch of a central angle of 90 degrees, and the fitting hole extends from the position where the second fitting protrusion is provided to the circumference. A radio control model chassis comprising four fitting holes arranged at a position rotated 45 degrees above the central angle.

A support portion that supports the front wheel, a groove portion that can accommodate the main body portion of the support portion, engaged means provided on a side surface of the groove portion, and a protruding portion provided on the main body portion of the support portion, An engagement protrusion capable of engaging with the engaged means,
A drive shaft that connects one rear wheel to one end and rotates, a transmission portion that transmits the rotational force of the drive motor while being connected to the other end of the drive shaft, and is connected to the other rear wheel, and this transmission portion A wheel for a rear wheel having a plurality of fitting recesses provided on a surface facing the other rear wheel, a first fitting protrusion that can be fitted into the fitting recess, and a wheel for the rear wheel And an intermediate member that is interposed between the transmission portion and transmits the driving force of the transmission portion to the other rear wheel, and the plurality of fitting recesses of the transmission portion are centered on the center of the surface of the transmission portion. The second fitting that can be fitted into the fitting recess of the transmission portion on one side is eight fitting recesses arranged at a pitch of a central angle of 45 degrees on a single circumference. And a first protrusion of the wheel for attaching the wheel for the rear wheel from the other side. An intermediate member provided with a fitting hole into which the mating projection can be fitted, and the second fitting projection is a circle in which the fitting concave portion is arranged around a rotation center when the intermediate member is rotated. Four second fitting protrusions arranged on the circumference of the same diameter at a pitch of a central angle of 90 degrees, and the fitting hole extends from the position where the second fitting protrusion is provided to the circumference. A radio control model chassis comprising four fitting holes arranged at a position rotated 45 degrees above the central angle.

It consists of a front chassis on which a front wheel steering motor is mounted, and a rear chassis on which a battery and a motor for driving rear wheels are mounted.
A rail portion provided on a side portion of the front chassis, a first engaged means provided in the rail portion, a fitting member protruding from the rear chassis and fitting in the rail portion, and the fitting A first engaging projection that is projected from the member and engageable with the first engaged means,
A support portion that supports the front wheel, a groove portion that can accommodate the main body portion of the support portion, a second engaged means provided on a side surface of the groove portion, and a main body portion of the support portion. A second engaging projection capable of engaging with the second engaged means of the groove portion,
A drive shaft that connects one rear wheel to one end and rotates, a transmission portion that transmits the rotational force of the drive motor while being connected to the other end of the drive shaft, and is connected to the other rear wheel, and this transmission portion A wheel for a rear wheel having a plurality of fitting recesses provided on a surface facing the other rear wheel, a first fitting protrusion that can be fitted in the fitting recess, and a wheel for the rear wheel And an intermediate member that is interposed between the transmission portion and transmits the driving force of the transmission portion to the other rear wheel, and the plurality of fitting recesses of the transmission portion are centered on the center of the surface of the transmission portion. The second fitting that can be fitted into the fitting recess of the transmission portion on one side is eight fitting recesses arranged at a pitch of a central angle of 45 degrees on a single circumference. And a first protrusion of the wheel for attaching the wheel for the rear wheel from the other side. An intermediate member provided with a fitting hole into which the mating projection can be fitted, and the second fitting projection is a circle in which the fitting concave portion is arranged around a rotation center when the intermediate member is rotated. Four second fitting protrusions arranged on the circumference of the same diameter at a pitch of a central angle of 90 degrees, and the fitting hole extends from the position where the second fitting protrusion is provided to the circumference. A radio control model chassis comprising four fitting holes arranged at a position rotated 45 degrees above the central angle.