リンク機構の作り方

asapyon1226
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リンク機構の作り方

asapyon1226
Participant
Participant

自転車の後ろ変速機の調整について解説するために簡易的なモデルでアニメーションを制作しようと考えています。

平行四辺形のリンクの軸AおよびBには引きバネが掛かっていて、ネジが二本刺さった部品を起点に赤矢印の方向へ回転しようとする力がかかっています。平行四辺形のリンク自体に可動範囲の制限があります。調整ボルトCを目一杯緩めると可動範囲まで赤矢印の方向へ回転します。ここから調整ボルトCを締めていくとD部でリンクに当たり、さらに締めると今度は青い矢印の方向へリンクが動きます。

というのを作ろうと試行錯誤していますが、なかなかうまく行きません。アドバイスをお願いします。

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adachitech7
Consultant
Consultant

@asapyon1226 さん、こんにちは。

 

まず最初にコンポーネントを「固定」拘束するのではなく、位置固定ジョイントで原点との間に剛性拘束を付加するようにしました。このアセンブリを他のファイルでコンポーネントとして使う場合はこうしておく方が色々と確実です。

01.PNG

 

 

次に回転ジョイントに最大値の制限を加え、同じ角度でレストするように設定します。

これでバネが効いている状態を表現できます。

02.jpg

 

三角形の突起の形状を修正しておきました。

03.PNG

 

 

ダミーのピンを作りこれをネジにくっつけて、このピンとの間に接触セットを追加しておきます。

04.PNG05.PNG

 

これで円柱状ジョイントの中で回転とのモーションリンクを付けて駆動させればリンク機構を動かすことができます。

 

 

もう少し洗練された方法があるとは思いますがひとまずここまで。

参考になれば幸いです。

asapyon1226
Participant
Participant

 adachitech7さん、回答ありがとうございます。
教えて頂いた内容で、回転ジョイントの最小値を-30としリンクのレスト位置を逆にして。もう一つのネジにもダミーピンを付け、接触セットとモーションリンクを追加してみましたが、レストがうまく動かない状態になってしまいます。

adachitech7
Consultant
Consultant

@asapyon1226 さん、

 

私の方でも現象を確認しました。

念のため別のアセンブリを組んで検証してみましたが同じ状態になりますね。

どうもダミーピンとの接触セットが有効な場合にレストが上手く機能しないようです。

 

@saito.kh オートデスク、斎藤様。この動きはちょっとおかしな感じです。ソフトの不具合ではないでしょうか。一度調査願えないでしょうか。

 

@asapyon1226 さん、他の方法がないか考えてみます。

adachitech7
Consultant
Consultant

@asapyon1226 さん、

 

接触セットを使うのをやめて、リンク用のダミーコンポーネントをもう一つ追加してピンのスライドの動きに追随するようにしてみました。

3つ動画を貼りますので一度ご覧ください。分からないところがあればまた質問してください。

 

 

 

asapyon1226
Participant
Participant
@adachitech7さん、再度の回答ありがとうございます。
最初にきちんと説明しておくべきだったのですが、このリンクはボルトの先とジョイントしてしまうとマズイのです。
画像のように、リンクを赤線で示したワイヤーで引っ張る事によって動作させるもので、ネジはリンクの可動範囲を制限
するだけのものなのです。せっかく考えていただいて申し訳ないのですが、ジョイントの使い方を練習するために一度
作っては見ますが、別のアイデアが必要なようです。
また良いアイデアがありましたらお知らせいただければ幸いです。RD2.png

hide-wada
Mentor
Mentor
解決済み

@asapyon1226 さんへ おはようございます。

 

こんな感じで作ってみました。(他にもあると思いますが)

 

接触セットは止めて、制限付き回転1のジョイントに制限を付けました。(-30/+30)
ワイヤーを作り、ワイヤー同士にモーションリンクを付け、ワイヤーを引く事でアームを
動かす様にしました。

これで、動きが合っていますでしょうか?

 

ビデオとファイルを添付致します。

 

@adachitech7 さん、ファイルをお借りしました。

 

RD.png

 

Hidetoshi Wada
Mechanical designer

EESignature

adachitech7
Consultant
Consultant

@asapyon1226 さん、

 

別のダミーピンを作ってアセンブリしてみましがが、ダミーピンの位置を変えて固定するとどうしてもレスト機能が効かなくなりますね。今のところこのあたりが限界のようです。また良い案を思い付いたら投稿させてもらいます。

 

 

@hide-wada さん、

ネジを締めこむことで回転角度を任意に変えられるようなモーションを作りたいということだと思います。

接触セット以外で回転角度の制限を変えられる方法があればいいのですが。。。

hide-wada
Mentor
Mentor

@adachitech7 さんへ こんにちは

 

>ネジを締めこむことで回転角度を任意に変えられるようなモーションを作りたいということだと思います。

私もそう思っていて、既に@adachitech7 さんが返答された事でレスト以外は出来ていると思いましたので!

 

>接触セット以外で回転角度の制限を変えられる方法があればいいのですが。。。

モーションリンクを使いましたが、厳密では無いのですが、こんな方法はどうでしょうか?

 

ファイルを添付致します。

 

RD-1.pngRD-2.png

 

Hidetoshi Wada
Mechanical designer

EESignature

adachitech7
Consultant
Consultant

@hide-wada さん、

 

赤丸の部分、調整ボルトとリンク部材は連動して動いてはいけないみたいですね。なかなか上手い方法が見つけられずにいますが。。。

キャプチャ.PNG

asapyon1226
Participant
Participant

@adachitech7さん、返信ありがとうございます。
先に回答を頂いた「リンクに対してスライドするサーフェスに対して回転するピン」はうまく動きました。ただ上記の通りネジとリンクの接触がなくなってもネジの移動に対してリンクが動いてしまうのは想定している動作とは異なるため、今回はそのアイデアを活かすことができませんでした。


@hide-wadaさん
回答ありがとうございます。@adachitech7 さんの仰る通り、リンクが-30から30まで回転できるように設定してある状態でレストが-30であっても、例えば-25の位置にボルトが飛び出していればリンクも-25までしか戻れない、という機構を想定しています。言葉で説明するのが下手くそで申し訳ないのですが、ドアとドア枠をゴム紐で結びつけて、ドアを開いて手を離すと自動で閉まるドアを、ドアストッパーを置くことで完全に閉まらないようにする、というような構造です。ドアを開閉する「手」をワイヤーの移動
(最初の投稿時点ではリンクを直接操作していますが)で
、ゴム紐をレストで、ドアストッパーをボルトとの接触セットで再現しようとしているのですが、接触セットを有効にするとそもそもレストが動かないという問題が発生しており、代替案としていくつか提案を頂いているところです。
伸び縮みするワイヤーに関しては釣り竿や指示棒のように重なりながらスライドするような構造になっているのですね。実はここも、ワイヤーを引っ張るとワイヤーの形状が変化するのをどうやって再現するか考えていた所でした。このアイデアはありがたく使わせていただきます。

hide-wada
Mentor
Mentor

@asapyon1226 さんへ おはようございます。

 

現状のモデルだと、リンクの振れる角度が決まっているので、もしストッパボルトを出したり引っ込めたりすると

リンクとストッパボルトの間に隙間が空いたり、逆に重なってしまったりしますよね。

ストッパボルトの位置によって、リンクの角度を都度変更するのは駄目なんですね。

 

リンクの振れる角度を大きめにとっておき、リンクとストッパボルトの間に接触セットが出来ると大丈夫と

言う事ですね。 

接触セットが上手く使えれば良かったのですが、何か他に方法があるのか考えてみます。

Hidetoshi Wada
Mechanical designer

EESignature

adachitech7
Consultant
Consultant

@asapyon1226 さん、

 

回転に制限を付けるのではなく、平面ジョイントを別に設けて上下の動きに制限を付け、レストで下側に貼り付くようにしました。

これでも完璧ではないのですが、それらしい動きはできるようになっています。

 

hide-wada
Mentor
Mentor

@adachitech7 さんへ こんにちは

 

私も考えていましたが、上手く行きませんでした。

パラメーターで何とか出来ないかとか、接触セットのコンポーネントを回転ジョイントを付けたコンポーネントと

別にするとかしてみましたが駄目でした。 調整ボルトと接触する△の部分だけ別コンポーネントにしました。

別にジョイント(平面)を付けたらレストと接触セットがOKと言う事は、ジョイント(回転)と

接触セットに問題があるのかな?

試した中で、ジョイント(回転)と接触セットを有効化して、コンポーネント同士が接触する迄はレストが効いています。

一度接触すると、そこからレストが機能しなくなります。

Hidetoshi Wada
Mechanical designer

EESignature

adachitech7
Consultant
Consultant
解決済み

@asapyon1226 さん、

 

できました。

 

結局接触セットを使うのはあきらめ、ダミーのパーツを3つ組み合わせて構成しました。

三角の突起部の斜面に沿ってダミーパーツをスライドさせ、そのダミーパーツの中心とダミーピンを回転ジョイントで繋いでいます。さらに同じダミーピンを追加してもう一つのピンとの間にスライドジョイントを設け、左側には同期して動くけれども右側はフリーに動くような制限を付けています。

動画とデータをご確認ください。

01.png

 

asapyon1226
Participant
Participant

@adachitech7 さん、@hide-wada さん、こんばんわ。

やっとそれらしい動きをするものができました。ジョイントやジョイントの原点、モーションリンクの扱いに関してとても勉強になりました。これを元に実際の自転車の変速機の調整に役立つアニメーション制作を頑張っていきます。いくつものアイデアの提示、ありがとうございました。

製品名を入力してください

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We use Twitter to deploy digital advertising on sites supported by Twitter. Ads are based on both Twitter data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Twitter has collected from you. We use the data that we provide to Twitter to better customize your digital advertising experience and present you with more relevant ads. Twitter Privacy Policy
Facebook
We use Facebook to deploy digital advertising on sites supported by Facebook. Ads are based on both Facebook data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Facebook has collected from you. We use the data that we provide to Facebook to better customize your digital advertising experience and present you with more relevant ads. Facebook Privacy Policy
LinkedIn
We use LinkedIn to deploy digital advertising on sites supported by LinkedIn. Ads are based on both LinkedIn data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that LinkedIn has collected from you. We use the data that we provide to LinkedIn to better customize your digital advertising experience and present you with more relevant ads. LinkedIn Privacy Policy
Yahoo! Japan
We use Yahoo! Japan to deploy digital advertising on sites supported by Yahoo! Japan. Ads are based on both Yahoo! Japan data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Yahoo! Japan has collected from you. We use the data that we provide to Yahoo! Japan to better customize your digital advertising experience and present you with more relevant ads. Yahoo! Japan Privacy Policy
Naver
We use Naver to deploy digital advertising on sites supported by Naver. Ads are based on both Naver data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Naver has collected from you. We use the data that we provide to Naver to better customize your digital advertising experience and present you with more relevant ads. Naver Privacy Policy
Quantcast
We use Quantcast to deploy digital advertising on sites supported by Quantcast. Ads are based on both Quantcast data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Quantcast has collected from you. We use the data that we provide to Quantcast to better customize your digital advertising experience and present you with more relevant ads. Quantcast Privacy Policy
Call Tracking
We use Call Tracking to provide customized phone numbers for our campaigns. This gives you faster access to our agents and helps us more accurately evaluate our performance. We may collect data about your behavior on our sites based on the phone number provided. Call Tracking Privacy Policy
Wunderkind
We use Wunderkind to deploy digital advertising on sites supported by Wunderkind. Ads are based on both Wunderkind data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Wunderkind has collected from you. We use the data that we provide to Wunderkind to better customize your digital advertising experience and present you with more relevant ads. Wunderkind Privacy Policy
ADC Media
We use ADC Media to deploy digital advertising on sites supported by ADC Media. Ads are based on both ADC Media data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that ADC Media has collected from you. We use the data that we provide to ADC Media to better customize your digital advertising experience and present you with more relevant ads. ADC Media Privacy Policy
AgrantSEM
We use AgrantSEM to deploy digital advertising on sites supported by AgrantSEM. Ads are based on both AgrantSEM data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that AgrantSEM has collected from you. We use the data that we provide to AgrantSEM to better customize your digital advertising experience and present you with more relevant ads. AgrantSEM Privacy Policy
Bidtellect
We use Bidtellect to deploy digital advertising on sites supported by Bidtellect. Ads are based on both Bidtellect data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Bidtellect has collected from you. We use the data that we provide to Bidtellect to better customize your digital advertising experience and present you with more relevant ads. Bidtellect Privacy Policy
Bing
We use Bing to deploy digital advertising on sites supported by Bing. Ads are based on both Bing data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Bing has collected from you. We use the data that we provide to Bing to better customize your digital advertising experience and present you with more relevant ads. Bing Privacy Policy
G2Crowd
We use G2Crowd to deploy digital advertising on sites supported by G2Crowd. Ads are based on both G2Crowd data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that G2Crowd has collected from you. We use the data that we provide to G2Crowd to better customize your digital advertising experience and present you with more relevant ads. G2Crowd Privacy Policy
NMPI Display
We use NMPI Display to deploy digital advertising on sites supported by NMPI Display. Ads are based on both NMPI Display data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that NMPI Display has collected from you. We use the data that we provide to NMPI Display to better customize your digital advertising experience and present you with more relevant ads. NMPI Display Privacy Policy
VK
We use VK to deploy digital advertising on sites supported by VK. Ads are based on both VK data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that VK has collected from you. We use the data that we provide to VK to better customize your digital advertising experience and present you with more relevant ads. VK Privacy Policy
Adobe Target
We use Adobe Target to test new features on our sites and customize your experience of these features. To do this, we collect behavioral data while you’re on our sites. This data may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, your IP address or device ID, your Autodesk ID, and others. You may experience a different version of our sites based on feature testing, or view personalized content based on your visitor attributes. Adobe Target Privacy Policy
Google Analytics (Advertising)
We use Google Analytics (Advertising) to deploy digital advertising on sites supported by Google Analytics (Advertising). Ads are based on both Google Analytics (Advertising) data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Google Analytics (Advertising) has collected from you. We use the data that we provide to Google Analytics (Advertising) to better customize your digital advertising experience and present you with more relevant ads. Google Analytics (Advertising) Privacy Policy
Trendkite
We use Trendkite to deploy digital advertising on sites supported by Trendkite. Ads are based on both Trendkite data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Trendkite has collected from you. We use the data that we provide to Trendkite to better customize your digital advertising experience and present you with more relevant ads. Trendkite Privacy Policy
Hotjar
We use Hotjar to deploy digital advertising on sites supported by Hotjar. Ads are based on both Hotjar data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Hotjar has collected from you. We use the data that we provide to Hotjar to better customize your digital advertising experience and present you with more relevant ads. Hotjar Privacy Policy
6 Sense
We use 6 Sense to deploy digital advertising on sites supported by 6 Sense. Ads are based on both 6 Sense data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that 6 Sense has collected from you. We use the data that we provide to 6 Sense to better customize your digital advertising experience and present you with more relevant ads. 6 Sense Privacy Policy
Terminus
We use Terminus to deploy digital advertising on sites supported by Terminus. Ads are based on both Terminus data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that Terminus has collected from you. We use the data that we provide to Terminus to better customize your digital advertising experience and present you with more relevant ads. Terminus Privacy Policy
StackAdapt
We use StackAdapt to deploy digital advertising on sites supported by StackAdapt. Ads are based on both StackAdapt data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that StackAdapt has collected from you. We use the data that we provide to StackAdapt to better customize your digital advertising experience and present you with more relevant ads. StackAdapt Privacy Policy
The Trade Desk
We use The Trade Desk to deploy digital advertising on sites supported by The Trade Desk. Ads are based on both The Trade Desk data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that The Trade Desk has collected from you. We use the data that we provide to The Trade Desk to better customize your digital advertising experience and present you with more relevant ads. The Trade Desk Privacy Policy
RollWorks
We use RollWorks to deploy digital advertising on sites supported by RollWorks. Ads are based on both RollWorks data and behavioral data that we collect while you’re on our sites. The data we collect may include pages you’ve visited, trials you’ve initiated, videos you’ve played, purchases you’ve made, and your IP address or device ID. This information may be combined with data that RollWorks has collected from you. We use the data that we provide to RollWorks to better customize your digital advertising experience and present you with more relevant ads. RollWorks Privacy Policy

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