1289965 (1) 玖、發明說明 【發明所屬之技術領域】 本發明是有關於一種將磁極形成用永久磁鐵組裝於轉 子鐵心的內部所構成的外轉型永久磁鐵電動機的轉子。 【先前技術】 作爲習知的外轉型永久磁鐵電動機有記載於如日本專 利第3 0 1 795 3號公報者。上述永久磁鐵電動機是具備：圓 板部及具有一體地設於上述圓板部的外周部的環狀壁的磁 性體製的機架，沿著上述機架的外周面的磁性體製的環構 件所構成的轉子。 上述永久磁鐵是朝徑向被磁化，並交互地配置成相鄰 接的永久磁鐵內周側的極性不相同。在上述轉子中，流在 相鄰接的永久磁鐵間的回流磁通是形成通過機架的環狀壁 及環構件之中。因此，環狀壁及環構件是成爲必須充分地 可確保永久磁鐵的磁路的厚度尺寸。 在上述永久磁鐵電動機中，藉由增大上述永久磁鐵的 磁力就可改善電動機特性’作爲該方法，採用增加上述永 久磁鐵的厚度，或高能量積的永久磁鐵。但是，當增加永 久磁鐵的磁力，則該分量’必須增加作爲後軛的環狀壁及 環構件的厚度尺寸。所以’有增加整體轉子的重量之同時 ，有大型化的問題。 【發明內容】 -5- (2) 1289965 本發明是鑑於上述事項而創作者，其目的是在於提供 一種一面抑制增加後軋的厚度尺寸一面可改善電動機特性 的外轉型永久磁鐵電動機的轉子。 本發明的申請專利範圍第1項的外轉型永久磁鐵電動 機的轉子，其係具有配設於定子的外周部的圓環形轉子鐵 心，及組裝於該內部的磁極形成用的複數永久磁鐵，其特 徵爲：上述永久磁鐵是設於上述轉子鐵心的內部成爲朝軸 方向延伸，被收納於斷面構成大約V形或大約圓弧形， 同時配設成該凸部朝上述轉子鐵心的外周側的***孔。 依照上述構成，出入各永久磁鐵的磁通方向傾向周方 向。所以，不必確保轉子鐵心中較永久磁鐵位在外周部形 成磁路所需的空間，又，可不需作爲後軛的環狀壁及環構 件。又，較永久磁鐵流在內周側的轉子鐵心的磁通是集中 在磁極中央部之故，因而可將磁通密度分布接近於正弦波 形狀而可減低鑲齒扭矩（Ogging torque)。 本發明的申請專利範圍第2項的外轉型永久磁鐵電動 機的轉子中，形成各磁極的永久磁鐵，是由配設在***孔 的周方向一方側半部及另一方側半部的兩個永久磁鐵所構 成，爲其特徵者。 配置於***孔的周方向中央部的永久磁鐵，是該磁氣 方向成爲徑向之故，因而該分量會導致增加後軛的厚度尺 寸。藉由將形成各磁極的永久磁鐵作成配置於***孔的周 方向一方側半部及另一方側半部的兩個永久磁鐵，可作成 在***孔的周方向中央部未存有永久磁鐵的構成。 1289965 (3) 這時候，若將各永久磁鐵構成標準性形狀的大約平板 狀，則可減低該構造成本（申請專利範圍第3項的發明） 〇 又，上述轉子鐵心是由層積鐵板所構成，則可將能耗 抑制成較小（申請專利範圍第4項的發明）。 又，上述轉子鐵心是環狀地配置複數分割轉子鐵心所 構成，則可提高材料採用的效率（申請專利範圍第5項的 發明）。 本發明的申請專利範圍第6項的外轉型永久磁鐵電動 機的轉子，是在上述***孔嵌入上述永久磁鐵，爲其特徵 者。依照上述構成，可將永久磁鐵牢固地組裝於轉子鐵心 的內部。 又，本發明的申請專利範圍第7項的外轉型永久磁鐵 電動機的轉子，是具備：在中心部具有軸支持部的圓形狀 主板部及豎設於上述主板部的外周緣部且具有沿著上述轉 子鐵心的外周面的環狀壁的機架；上述轉子鐵心與上述機 架是藉由.樹脂一體地構成，爲其特徵者。 依照上述構成，可提昇轉子鐵心的強度。又，藉由一 體化轉子鐵心與機架的樹脂，可牢固地固定被收納於*** 孔的永久磁鐵。 本發明的申請專利範圍第8項的外轉型永久磁鐵電動 機的轉子，是將上述***孔，構成開口在轉子鐵心的外周 面’爲其特徵者。 依照上述構成，可將永久磁鐵從上述***孔的外周面 -7- 1289965 (4) 的開口***在***孔內。又，將永久磁鐵***於***孔之 後，藉由一體化轉子鐵心與機架，上述開口是藉由機架的 環狀壁。所以，永久磁鐵也不會經上述開口脫落。又，可 將永久磁鐵從上述開口***在***孔之故，因而堵住*** 孔的軸向兩端面而可進行永久磁鐵的軸向定位。 本發明的申請專利範圍第9項的外轉型永久磁鐵電動 機的轉子是上述***孔的軸向兩端部中，封閉一方，爲其 特徵者。 依照上述構成，可將配設在轉子鐵心的內部的永久磁 鐵朝軸向定位。 本發明的申請專利範圍第1 〇項的外轉型永久磁鐵電 動機的轉子中，上述***孔是由對應於上述永久磁鐵的形 狀的收納部，及設於上述收納部的外周部，而上述永久磁 鐵被收納於上述收納部時，在上述永久磁鐵的外周部產生 空間部的凹部所構成，爲其特徵者。 依照上述構成，以樹脂一體化轉子鐵心與機架時，則 樹脂進入至上述空間部，藉由該樹脂使得永久磁鐵被推向 收納部內面中反凹部側的面，而被定位。 本發明的申請專利範圍第Π項的外轉型永久磁鐵電 動機的轉子，是在轉子鐵心，設置以樹脂一體化上述轉子 鐵心與機架時，使得上述樹脂流入的貫通孔，爲其特徵者 。依照上述構成，可將轉子鐵心對於機架的固定成爲更牢 固者。 然而’轉子鐵心中比永久磁鐵位於內周部的部分，是 -8- (5) 1289965 形成有與定子的磁路的部分之故，因而若在該部分設置貫 通孔，則導致降低電動機特性。又在本發明的申請專利範 圍第1 2項的外轉型永久磁鐵電動機的轉子中，上述貫通 孔是轉子鐵心中比永久磁鐵設於外周部。依照該構成，藉 由設置貫通孔使得電動機特性不會降低。 本發明的申請專利範圍第1 3項的外轉型永久磁鐵電 動機的轉子中，轉子鐵心的各磁極的內周面，是上述磁極 的中央部比周方向兩端部構成與固定鐵心之間的距離較小 ，爲其特徵者。 依照上述構成，鐵心間空隙的磁通密度是從磁極端部 平緩地變化，可將空隙磁通密度分布更接近於正弦波形狀 【實施方式】 以下，一面參照第1圖至第6圖一面說明本發明的第 一實施例。第1圖是表示構成本實施例的外轉型永久磁鐵 電動機的定子1的圖式，而第2圖至第5圖是表示轉子2 的圖式。首先，在第1圖中，定子1的定子鐵心3是形成 具有呈環狀的軛部4，及設成放射狀突出於該軛部4的外 周部的多數個齒5的構成。這時候，定子鐵心3是藉由朝 周方向地連結複數個分割鐵心（未圖示）形成呈環狀。各 分割鐵心是層積多數枚被沖切成所定形狀的矽鋼板所構成 〇 在定子鐵心3的軛部4及各齒5的外面的大約整體’ -9- (6) 1289965 藉由模塑成形設有絕緣樹脂製的覆蓋構件6。在覆蓋構件 6位於軛部4的內周側而一體地設有複數個安裝部7。該 安裝部7,是被利用在將定子鐵心安裝於如洗衣機的機構 部（未圖示）的時候。在各齒5捲繞有線圈8，藉由以上 構成定子1。 另一方面，如第2圖至第5圖所示地，轉子2是藉由 以合成樹脂1 1 一體地成形機架9與轉子鐵心1 0所構成。 機架9是藉由壓製加工磁性體之如電磁鐵板而形成扁平有 底圓筒狀者，在中心部具有軸支持體安裝孔12的主板部 1 3，及豎設在上述主板部1 3的外周緣部的環狀壁1 4所構 成。在上述軸支持體安裝孔12，成爲能安裝支持旋轉軸 的軸支持體（均未圖示）。上述旋轉軸是經由未圖示的軸 承而成爲旋轉自如地支持之狀態。 在上述主板部1 3的外周部所有全周設有段差部1 5 ; 上述轉子鐵心1 0是被配置在圍繞於段差部1 5及環狀壁 14的空間。此時，轉子鐵心10的內周面與段差部1 5的 內周面是構成大約同一面。在上述段差部15有複數孔16 形成於所有全周。 又，在上述主板部1 3中比上述段差部1 5更接近內周 部的部分，藉由豎起加工所形成的複數通風孔1 3a以軸支 持體安裝孔12爲中心配置成放射狀。又，在第2圖中， 相反地表示機架9的上下。 上述轉子鐵心10是藉由層積多數枚被沖切成大約圓 環狀的磁性體的如鐵板所構成。在上述轉子鐵心1 0的內 -10- (7) 1289965 部設有多數V形狀的***孔17’而在各***孔17分別配 設有磁極形成用的一對永久磁鐵1 8。在本實施例中，各 磁極是由一對永久磁鐵1 8所構成。 上述***孔1 7是中央折彎部位於轉子鐵心1 0的外周 側，而周方向兩端部配置在位於轉子鐵心1 〇的內周側方 向，在上述折彎部中開設於上述轉子鐵心1 〇的外周面。 在構成轉子鐵心10的層積鐵板中位於軸向兩端部的一至 複數枚鐵板形成有相對應於***孔17的孔。因此，上述 ***孔1 7的軸向兩端部是未開口。 上述一對永久磁鐵1 8是呈矩形狀的平板狀，分別配 設於上述***孔17中從折彎部至一端部的收納部17a、 及從折彎部至另一端的收納部1 7b。在各收納部1 7a、1 7b 的外周部中央，分別設有朝軸向全面地延伸的斷面半圓形 的凹部1 9。上述永久磁鐵1 8是形成從轉子鐵心1 0的外 周面經***孔1 7的開口 1 7 c被***在各收納部1 7 a、1 7b 。此時，在上述凹部1 9未設置永久磁鐵1 8而產生空間部 〇 上述永久磁鐵1 8是採用該磁力大約3 1 6 ( MA/m )以 上的高能量積者。各永久磁鐵1 8是朝厚度方向磁化，一 對永久磁鐵1 8是配設於各收納部1 7a、1 7b成爲內周側的 極性相同。 又，在上述轉子鐵心1 0中位於上述***孔1 7之間的 部分設有朝軸向貫通的圓形狀的貫通孔20。又，在上述 轉子鐵心1 0之外周面中位於上述***孔1 7之間的部分設 -11 - 1289965 (8) 有朝軸向貫通的半圓形缺口 21。 上述轉子2是在上述機架9的環狀壁14及段差部15 與上述轉子鐵心1 〇之間塡充合成樹脂1 1使之硬化而藉由 一體化機架9與轉子鐵心1 0所構成。此時，上述合成樹 月旨1 1是形成經孔1 6也位於機架9的外部。上述合成樹脂 11是形成也塡充在貫通孔20及缺口 21的內部。藉由以 上構成，轉子鐵心10是牢固地被固定在機架9。 又，上述合成樹脂11是形成經開口 17c也流進*** 孔17。由此，各永久磁鐵18是被推向收納部17a、17b 的內周側端部而被定位。又，流進***孔1 7的樹脂1 1是 經永久磁鐵1 8與收納部1 7a、1 7b之間的間隙而流進凹部 (室間部）1 9。由此，永久磁鐵1 8是推向收納部1 7a、 1 7b的內面中反凹部1 9側的面而被定位。 以下參照第6圖說明上述構成的作用。第6圖是表示 出入永久磁鐵18的磁通。又，在第6圖中表示轉子鐵心 1 〇下方爲內周側（定子1側）。 在本實施例中，各永久磁鐵1 8配置成傾斜地橫跨著 轉子鐵心1 0內部之故，因而出入永久磁鐵1 8的磁通Φ的 方向朝周方向傾斜。因此，相鄰接的磁極的回流磁通的磁 路是主要形成在轉子鐵心1 〇的內部，而成爲不需要將磁 路形成在機架9的環狀壁1 4的情形。所以，一將環狀壁 1 4的厚度尺寸，設定成可確保用以支持轉子鐵心1 〇所需 的機械性強度的尺寸就可以，而與習知相比較可更減小厚 度尺寸以得到輕量化。 -12- 1289965 (9) 又，流動在比永久磁鐵1 8更內周側的轉子鐵心1 〇的 磁通Φ是朝磁極中央部之故’因而磁通密度在磁極中央部 者高於端部者。因此，鐵心間空隙的磁通密度分布接近於 正弦波形狀，可減低鑲齒扭矩而可提高電動機特性。 如此地，在本實施例中，在轉子鐵心1 〇內部設置V 形***孔1 7，而由被收納於該***孔1 7的兩個永久磁鐵 1 8構成各磁極，使得各永久磁鐵1 8的磁性方向朝周方向 。因此，成爲在機架9的環狀壁14不需要作爲後軛的功 能，而該分量，可減小環狀壁1 4的厚度尺寸。 又，***孔1 7中分成周方向一方側的收納部1 7a及 另一方側的收納部1 7 b收納兩個永久磁鐵1 8。因此，在 磁性方向成爲徑向的***孔17的周方向中央部可作成未 存有永久磁鐵的構成，由此，也可減小機架9的厚度尺寸 〇 又，也可考量永久磁鐵1 8是採用磁性方向性成爲周 方向的極各向異性的永久磁鐵（塑膠磁鐵），來減小轉子 鐵心1 〇的徑向尺寸。但是，極各向異性的永久磁鐵是有 製造成本較高的缺點。對此在本實施例中，使用標準性形 狀的矩形板狀永久磁鐵1 8之故，因而可抑制製造成本。 又，由層積鐵板構成上述轉子鐵心1 〇。因此，可減 少能耗。 又，以合成樹脂1 1 一體化轉子鐵心1 〇與機架9。特 別是，在本實施例中，在轉子鐵心1 〇設置貫通孔20或缺 口 21，而在此些貫通孔20，缺口 21構成塡充著合成樹脂 •13- 1289965 (ίο) li之故，因而可牢固地一體化轉子鐵心ι〇與機架9。這 時候，上述貫通孔20或缺口 21是位在永久磁鐵1 8的外 周側之故，因而對電動機特性不會有不良影響。 又，將***孔1 7開設在轉子鐵心1 〇的外周面，同時 塞住該上下端部。所以’可防止永久磁鐵1 8朝軸向偏離 移動。 第7圖是表示本發明的第二實施例者，說明與第一實 施例不相同處。又，在與第一實施例相同部分賦於相同記 號。在該第二實施例中’藉由環狀地配置複數分割鐵心 3 1而構成轉子鐵心1 〇。上述分割鐵心3 1是每一複數磁極 地分割轉子鐵心1 〇者’而構成相鄰接的分割鐵心3 1的連 結部3 1 a位於磁極間。 所以可得到轉子鐵心1 〇的材料採用的效率化。而且 構成分割鐵心31的連結部位於磁極間之故，因而對於鐵 心間的磁通密度分布不會有不良影響。 又，在本實施例中，在上述轉子鐵心10的各磁極內 周面中除了周方向兩端部之部分以外設置圓弧面狀凸部 3 2，使得轉子鐵心1 〇的各磁極的周方向兩端部的徑向尺 寸短於磁極中央部的徑向尺寸。凸部32的形狀及配置， 各部尺寸是設成使得空隙磁通密度分布成爲大約正弦波形 狀，本案發明人經實驗所求得者。 由上述構成，可得到提高電動機特性。又，在本賓施 例中，構成將***孔1 7的收納部1 7 a、1 7 b的寬度尺寸設 定成與永久磁鐵1 8的厚度尺寸大約相同或稍小，並能將 -14 - 1289965 (11) 上述永久磁鐵18嵌入於上述收納部17a、17b。因此，在 本實施例中，在上述收納部17a、17b的外周部未設置凹 部19 〇 又，在本實施例中，未將貫通孔20及缺口 21設在轉 子鐵心1 0。在本實施例中，構成以合成樹脂Π —體化上 述轉子鐵心1 〇與機架9之際，上述樹脂1 1被塡充在轉子 鐵心10的內周面中位於凸部3 2與凸部3 2之間。所以， 雖省略了上述貫通孔20及缺口，也可將轉子鐵心10固定 在機架9成爲牢固者。 而且，藉由將合成樹脂11塡充在轉子鐵心1〇的內周 面中位於凸部3 2與凸部3 2之間，可減小轉子鐵心1 0內 周面的凹凸。因此，藉由將凸部32設在轉子鐵心10的內 周面，可抑制隨著轉子鐵心1 0的旋轉所發生的噪音的增 大。 第8圖是表示本發明的第三實施例者，說明與第一實 施例不相同的。在該第三實施例中，在***孔17的開口 1 7c附近設置突起4 1。上述突起4 1是設置成分別對應於 ***孔1 7的收納部1 7a、1 7b，而將永久磁鐵***在各收 納部17a、17b之前，朝外周側突出。之後，將永久磁鐵 18***在各收納部17a、17b之後，折彎而將永久磁鐵18 推向內周側。 在此種構件中，也可將永久磁鐵1 8定位在各收納部 17a、17b內的所定位置。 又，在上述實施例中，均將矩形板狀的永久磁鐵18 -15- 1289965 (12) 組裝於轉子鐵心1 〇，惟如表示於第9圖的第4實施例， 將呈大約圓弧板狀的複數永久磁鐵51組裝於轉子鐵心1 〇 也可以。這時候，由一個永久磁鐵5 1形成有一個磁極。 在上述構成中，永久磁鐵51的磁性方向朝周方向傾 斜之故，因而也可減少機架9的厚度尺寸。 又，本發明是並不被限定於上述實施例者，例如有如 下變形。 機架是塑膠製也可以。亦即，機架是具有支持轉子鐡 心的功能，並不需作爲後軛的功能。因此，藉由將機架作 爲塑膠製而可得到輕量化。 (發明效果） 由以上說明可知，本發明的外轉型永久磁鐵電動機的 轉子，係將磁極形成用的複數永久磁鐵組裝於配設在定子 外周部的轉子鐵心內部者，設於上述轉子鐵心的內部成爲 朝軸方向延伸，被收納於斷面構成大約V形或大約圓弧 形，同時配設成該凸部朝上述轉子鐵心的外周側的***孔 收納上述永久磁鐵之故，因而可將上述永久磁鐵的磁性方 向朝周方向傾斜，該分量可減少後軛的厚度尺寸。又，鐵 心間的磁通密度分布接近於正弦波形狀而可減低鑲齒扭矩 【圖式簡單說明】 第1圖是表示本發明的第一實施例的外轉型永久磁鐵 -16- (13) 1289965 電動機的定子的構成的立體圖。 第2圖是表示轉子的構成的立體圖。 第3圖是表示轉子的橫剖視圖。 第4圖是表示第3圖中沿著XI-XI線的轉子的縱1 視圖。 第5圖是表示第3圖中沿著X2-X2線的轉子的縱剖 視圖。 第6圖是表示用以說明磁通密度分布的圖式。 第7圖是表示本發明的第二實施例的第3圖相當圖。 第8圖是表示本發明的第三實施例的第3圖相當圖。 第9圖是表示本發明的第四實施例的第6圖相當圖。 (記號之說明） 1 :定子 2 :轉子 9 :機架 1 〇 :轉子鐵心 Π :合成樹脂 1 3 :主板部 14 :環狀壁 1 7 :***孔 1 8 :永久磁鐵 17a、17b :收納部 17c :開口 -17- 1289965 (14) 1 9 :凹部 2 Ο :貫通孔1289965 (1) Technical Field of the Invention The present invention relates to a rotor for an externally-transformed permanent magnet motor in which a permanent magnet for forming a magnetic pole is assembled inside a rotor core. [Prior Art] A conventionally-transformed permanent magnet motor is known as Japanese Patent No. 3 0 1 795 3 . The permanent magnet motor includes a disk portion and a magnetic frame having an annular wall integrally provided on an outer peripheral portion of the disk portion, and a magnetic ring member along an outer circumferential surface of the frame The rotor. The permanent magnets are magnetized in the radial direction and are alternately arranged such that the polarities of the inner peripheral sides of the adjacent permanent magnets are different. In the above rotor, the recirculating magnetic flux flowing between the adjacent permanent magnets is formed in the annular wall and the ring member passing through the frame. Therefore, the annular wall and the ring member are thickness dimensions that are necessary to sufficiently ensure the magnetic path of the permanent magnet. In the above permanent magnet motor, the motor characteristics can be improved by increasing the magnetic force of the permanent magnet. As this method, a permanent magnet in which the thickness of the permanent magnet or the high energy product is increased is used. However, when the magnetic force of the permanent magnet is increased, the component ' must increase the thickness of the annular wall and the ring member as the back yoke. Therefore, there is a problem of increasing the size of the overall rotor and increasing the size. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a rotor of an outer-transformed permanent magnet motor which can improve the characteristics of a motor while suppressing an increase in thickness of a post-rolling. The rotor of the outer-transformed permanent magnet motor according to the first aspect of the present invention has a toroidal rotor core disposed on an outer peripheral portion of the stator, and a plurality of permanent magnets for forming a magnetic pole incorporated therein. The permanent magnet is provided in the rotor core so as to extend in the axial direction, and is housed in a cross section that is formed in a substantially V shape or an approximately circular arc shape, and is disposed such that the convex portion faces the outer peripheral side of the rotor core. Insert the hole. According to the above configuration, the direction of the magnetic flux entering and exiting each of the permanent magnets tends to be in the circumferential direction. Therefore, it is not necessary to ensure a space required for the permanent magnet in the rotor core to form a magnetic circuit at the outer peripheral portion, and it is not necessary to use the annular wall and the ring member of the back yoke. Further, since the magnetic flux of the rotor core on the inner peripheral side of the permanent magnet flow is concentrated in the central portion of the magnetic pole, the magnetic flux density distribution can be made close to the sine wave shape, and the Ogging torque can be reduced. In the rotor of the outer-transformed permanent magnet motor according to the second aspect of the invention of the second aspect of the invention, the permanent magnets forming the magnetic poles are two permanent members disposed on one side half and the other half of the insertion hole in the circumferential direction. It is composed of magnets and is characterized by it. The permanent magnet disposed in the central portion of the insertion hole in the circumferential direction is such that the magnetic gas direction is radial, and this component causes an increase in the thickness dimension of the back yoke. By forming the permanent magnets forming the respective magnetic poles into two permanent magnets disposed on one side and the other half of the insertion hole in the circumferential direction, it is possible to form a permanent magnet in the center portion of the insertion hole in the circumferential direction. . 1289965 (3) At this time, if each of the permanent magnets has a flat shape of a standard shape, the construction cost can be reduced (the invention of claim 3). Further, the rotor core is made of laminated iron plates. In the case of the composition, the energy consumption can be suppressed to a small extent (the invention of claim 4). Further, since the rotor core is configured by arranging a plurality of divided rotor cores in a ring shape, the efficiency of material use can be improved (the invention of claim 5). The rotor of the outer-transformed permanent magnet motor of claim 6 of the present invention is characterized in that the permanent magnet is embedded in the insertion hole. According to the above configuration, the permanent magnet can be firmly assembled to the inside of the rotor core. Further, the rotor of the outer-transformed permanent magnet motor according to claim 7 of the present invention includes: a circular main plate portion having a shaft support portion at a center portion; and an outer peripheral edge portion erected on the main plate portion and having along The frame of the annular wall on the outer circumferential surface of the rotor core; the rotor core and the frame are integrally formed of a resin. According to the above configuration, the strength of the rotor core can be increased. Further, by integrally molding the rotor core and the resin of the frame, the permanent magnet accommodated in the insertion hole can be firmly fixed. The rotor of the outer-transformed permanent magnet motor of claim 8 of the present invention is characterized in that the insertion hole is formed to have an opening on the outer circumferential surface of the rotor core. According to the above configuration, the permanent magnet can be inserted into the insertion hole from the opening of the outer peripheral surface -7 - 1289965 (4) of the insertion hole. Further, after the permanent magnet is inserted into the insertion hole, the opening is formed by the annular wall of the frame by the integrated rotor core and the frame. Therefore, the permanent magnet does not fall off through the above opening. Further, since the permanent magnet can be inserted into the insertion hole from the opening, the axial end faces of the insertion hole can be blocked to axially position the permanent magnet. The rotor of the outer-transformed permanent magnet motor of claim 9 of the present invention is characterized in that one of the axial end portions of the insertion hole is closed. According to the above configuration, the permanent magnet disposed inside the rotor core can be positioned in the axial direction. In the rotor of the outer-transformed permanent magnet motor according to the first aspect of the invention, the insertion hole is a housing portion corresponding to a shape of the permanent magnet, and an outer peripheral portion of the housing portion, and the permanent magnet When it is accommodated in the said accommodating part, it is set as the recessed part which generate the space part in the outer peripheral part of the said permanent magnet. According to the above configuration, when the rotor core and the frame are integrated by the resin, the resin enters the space portion, and the permanent magnet is pushed toward the surface on the concave side of the inner surface of the accommodating portion by the resin, and is positioned. The rotor of the externally-transformed permanent magnet motor according to the ninth aspect of the invention is characterized in that the rotor core is provided with a through hole through which the resin flows when the rotor core and the frame are integrated with a resin. According to the above configuration, the fixing of the rotor core to the frame can be made stronger. However, in the portion of the rotor core which is located at the inner peripheral portion of the permanent magnet, -8-(5) 1289965 is formed with a portion of the magnetic path of the stator. Therefore, if a through hole is provided in this portion, the motor characteristics are lowered. Further, in the rotor of the outer-transformed permanent magnet motor according to the fifteenth aspect of the invention, the through-hole is provided in the rotor core than the permanent magnet in the outer peripheral portion. According to this configuration, the through hole is provided so that the motor characteristics are not lowered. In the rotor of the outer-transformed permanent magnet motor of the first aspect of the invention, the inner peripheral surface of each magnetic pole of the rotor core is such that the central portion of the magnetic pole forms a distance from the fixed iron core at both end portions in the circumferential direction. Smaller, characterized by it. According to the above configuration, the magnetic flux density of the inter-core gap is gently changed from the magnetic pole end portion, and the gap magnetic flux density distribution can be made closer to the sine wave shape. [Embodiment] Hereinafter, the first to sixth figures will be described with reference to FIGS. A first embodiment of the invention. Fig. 1 is a view showing a stator 1 constituting the outer-transformed permanent magnet motor of the present embodiment, and Figs. 2 to 5 are views showing a rotor 2. First, in the first embodiment, the stator core 3 of the stator 1 has a configuration in which a yoke portion 4 having an annular shape and a plurality of teeth 5 projecting radially from the outer peripheral portion of the yoke portion 4 are formed. At this time, the stator core 3 is formed in a ring shape by connecting a plurality of divided cores (not shown) in the circumferential direction. Each of the divided cores is formed by laminating a plurality of steel sheets which are punched into a predetermined shape, and is formed on the outer surface of the yoke portion 4 of the stator core 3 and the respective teeth 5 by a molding process. -9- (6) 1289965 A cover member 6 made of an insulating resin is provided. The cover member 6 is provided on the inner peripheral side of the yoke portion 4 to integrally provide a plurality of mounting portions 7. The mounting portion 7 is used when the stator core is attached to a mechanism (not shown) such as a washing machine. The coil 8 is wound around each of the teeth 5, and the stator 1 is constituted by the above. On the other hand, as shown in Figs. 2 to 5, the rotor 2 is integrally formed by integrally molding the frame 9 and the rotor core 10 with the synthetic resin 1 1 . The frame 9 is formed by pressing a magnetic body such as an electromagnet plate to form a flat bottomed cylindrical shape, and has a main plate portion 13 having a shaft support mounting hole 12 at a center portion, and is erected on the main plate portion 13 The annular wall 14 of the outer peripheral portion is formed. The shaft support mounting hole 12 is provided with a shaft support (none of which is shown) that can support the rotating shaft. The above-mentioned rotating shaft is rotatably supported via a bearing (not shown). A step portion 15 is provided on all of the outer peripheral portions of the main plate portion 13, and the rotor core 10 is disposed in a space surrounding the step portion 15 and the annular wall 14. At this time, the inner circumferential surface of the rotor core 10 and the inner circumferential surface of the step portion 15 constitute approximately the same surface. In the step portion 15 described above, a plurality of holes 16 are formed in all the entire circumferences. Further, in the portion of the main plate portion 13 which is closer to the inner peripheral portion than the step portion 15, the plurality of vent holes 13a formed by the erecting process are arranged radially around the shaft supporting body mounting hole 12. Further, in Fig. 2, the upper and lower sides of the chassis 9 are reversely shown. The rotor core 10 is composed of, for example, an iron plate in which a plurality of magnetic bodies which are punched into a substantially circular shape are laminated. In the inner -10- (7) 1289965 portion of the rotor core 10, a plurality of V-shaped insertion holes 17' are provided, and a pair of permanent magnets 18 for magnetic pole formation are disposed in the respective insertion holes 17. In the present embodiment, each of the magnetic poles is constituted by a pair of permanent magnets 18. The insertion hole 17 has a central bent portion on the outer peripheral side of the rotor core 10, and both end portions in the circumferential direction are disposed on the inner peripheral side of the rotor core 1A, and are opened in the rotor core 1 in the bent portion. The outer surface of the dragonfly. One or more of the plurality of iron plates located at both axial ends in the laminated iron plate constituting the rotor core 10 are formed with holes corresponding to the insertion holes 17. Therefore, the axial end portions of the above-mentioned insertion holes 17 are not opened. The pair of permanent magnets 18 are formed in a rectangular plate shape, and are disposed in the insertion hole 17 from the bent portion to the one end portion of the accommodating portion 17a and the accommodating portion 17b from the bent portion to the other end. In the center of the outer peripheral portion of each of the accommodating portions 17a and 17b, a concave portion 19 having a semicircular cross section extending in the axial direction is provided. The permanent magnet 18 is inserted into each of the accommodating portions 1 7 a and 17 b so as to form an opening 1 7 c from the outer peripheral surface of the rotor core 10 through the insertion hole 17 . At this time, the permanent magnet 18 is not provided in the concave portion 19 to generate a space portion. The permanent magnet 18 is a high energy product having a magnetic force of about 3 16 (MA/m) or more. Each of the permanent magnets 18 is magnetized in the thickness direction, and the pair of permanent magnets 18 are disposed to have the same polarity on the inner peripheral side of each of the housing portions 17a and 17b. Further, a portion of the rotor core 10 located between the insertion holes 17 is provided with a circular through hole 20 penetrating in the axial direction. Further, a portion of the outer peripheral surface of the rotor core 10 located between the insertion holes 17 is provided with a semicircular notch 21 penetrating in the axial direction. The rotor 2 is formed by filling the annular wall 14 of the frame 9 and the step portion 15 and the rotor core 1 塡 with a synthetic resin 1 1 to be cured, and is formed by the integrated frame 9 and the rotor core 10 . At this time, the above-described synthetic tree is also formed to form the via hole 16 and is also located outside the frame 9. The synthetic resin 11 is formed and filled inside the through hole 20 and the notch 21. With the above configuration, the rotor core 10 is firmly fixed to the frame 9. Further, the synthetic resin 11 is formed into the insertion hole 17 through the opening 17c. Thereby, each of the permanent magnets 18 is positioned to be pushed toward the inner peripheral side end portion of the accommodating portions 17a and 17b. Further, the resin 1 1 flowing into the insertion hole 17 flows into the concave portion (inter-chamber portion) 19 through the gap between the permanent magnet 18 and the accommodating portions 17a and 17b. Thereby, the permanent magnets 18 are positioned to be pushed toward the surface of the inner surface of the accommodating portions 17a and 17b on the side of the concave portion 19 side. The action of the above configuration will be described below with reference to Fig. 6. Fig. 6 is a view showing the magnetic flux entering and exiting the permanent magnet 18. Further, in Fig. 6, the lower side of the rotor core 1 〇 is the inner peripheral side (the stator 1 side). In the present embodiment, each of the permanent magnets 18 is disposed so as to slant across the inside of the rotor core 10, so that the direction of the magnetic flux Φ entering and exiting the permanent magnets 18 is inclined in the circumferential direction. Therefore, the magnetic circuit of the recirculating magnetic flux of the adjacent magnetic poles is mainly formed inside the rotor core 1 ,, and it is not necessary to form the magnetic circuit in the annular wall 14 of the frame 9. Therefore, the thickness of the annular wall 14 is set to a size that ensures the mechanical strength required to support the rotor core 1 , and the thickness can be further reduced to obtain a lighter weight than conventionally known. Quantify. -12- 1289965 (9) Further, the magnetic flux Φ flowing through the rotor core 1 更 on the inner circumferential side of the permanent magnet 18 is toward the central portion of the magnetic pole. Therefore, the magnetic flux density is higher than the end portion in the central portion of the magnetic pole. By. Therefore, the magnetic flux density distribution of the inter-core gap is close to the sine wave shape, and the chip torque can be reduced to improve the motor characteristics. Thus, in the present embodiment, the V-shaped insertion hole 17 is provided inside the rotor core 1 而, and the respective magnetic poles are formed by the two permanent magnets 18 accommodated in the insertion hole 17 such that the permanent magnets 18 The magnetic direction is towards the circumference. Therefore, the annular wall 14 in the frame 9 does not need to function as a back yoke, and this component can reduce the thickness dimension of the annular wall 14. Further, the insertion hole 17 is divided into a storage portion 17a on one side in the circumferential direction and a storage portion 17b on the other side, and accommodates two permanent magnets 18. Therefore, in the central portion in the circumferential direction of the insertion hole 17 in which the magnetic direction is formed in the radial direction, a configuration in which the permanent magnet is not present can be formed, whereby the thickness dimension of the frame 9 can be reduced, and the permanent magnet 18 can also be considered. A permanent magnet (plastic magnet) having a magnetic anisotropy in the circumferential direction is used to reduce the radial dimension of the rotor core 1 。. However, a very anisotropic permanent magnet has the disadvantage of being expensive to manufacture. In this embodiment, the rectangular plate-shaped permanent magnets 18 of a standard shape are used, so that the manufacturing cost can be suppressed. Further, the rotor core 1 构成 is formed of a laminated iron plate. Therefore, energy consumption can be reduced. Further, the rotor core 1 〇 and the frame 9 are integrated with the synthetic resin 1 1 . In particular, in the present embodiment, the through hole 20 or the notch 21 is provided in the rotor core 1 , and in the through holes 20, the notch 21 is filled with synthetic resin • 13-1289965 (ίο) li, thus The rotor core ι and the frame 9 can be firmly integrated. At this time, the through hole 20 or the notch 21 is located on the outer peripheral side of the permanent magnet 18, and thus does not adversely affect the motor characteristics. Further, the insertion hole 17 is opened on the outer peripheral surface of the rotor core 1 , while the upper and lower ends are plugged. Therefore, the permanent magnet 18 can be prevented from moving away from the axial direction. Fig. 7 is a view showing a second embodiment of the present invention, and is different from the first embodiment. Further, the same portions as those of the first embodiment are given the same reference numerals. In the second embodiment, the rotor core 1 构成 is constituted by arranging the plurality of split cores 3 1 in a ring shape. The split core 31 is divided into the rotor core 1 by a plurality of magnetic poles, and the connecting portion 3 1 a constituting the adjacent split cores 3 1 is located between the magnetic poles. Therefore, the efficiency of the material used for the rotor core 1 〇 can be obtained. Further, since the connecting portion constituting the split core 31 is located between the magnetic poles, there is no adverse effect on the magnetic flux density distribution between the cores. Further, in the present embodiment, the arcuate convex portion 3 2 is provided on the inner peripheral surface of each of the magnetic poles of the rotor core 10 except for the both end portions in the circumferential direction, so that the circumferential direction of each magnetic pole of the rotor core 1 〇 The radial dimension of the ends is shorter than the radial dimension of the central portion of the pole. The shape and arrangement of the convex portions 32 are set such that the gap magnetic flux density distribution is approximately sinusoidal, and the inventors of the present invention have experimentally obtained them. According to the above configuration, the motor characteristics can be improved. Further, in the present embodiment, the width of the accommodating portions 1 7 a and 1 7 b constituting the insertion hole 17 is set to be approximately the same as or slightly smaller than the thickness of the permanent magnet 18, and can be -14 - 1289965 (11) The permanent magnet 18 is fitted in the housing portions 17a and 17b. Therefore, in the present embodiment, the concave portion 19 is not provided in the outer peripheral portion of the accommodating portions 17a and 17b. In the present embodiment, the through hole 20 and the notch 21 are not provided in the rotor core 10. In the present embodiment, when the rotor core 1 〇 and the frame 9 are formed by synthesizing the synthetic resin, the resin 11 is entangled in the inner peripheral surface of the rotor core 10 at the convex portion 3 2 and the convex portion. Between 3 and 2. Therefore, the above-described through hole 20 and the notch are omitted, and the rotor core 10 can be fixed to the frame 9 to be strong. Further, by fitting the synthetic resin 11 between the convex portion 3 2 and the convex portion 3 2 on the inner circumferential surface of the rotor core 1 , the unevenness of the inner circumferential surface of the rotor core 10 can be reduced. Therefore, by providing the convex portion 32 on the inner circumferential surface of the rotor core 10, it is possible to suppress an increase in noise which occurs as the rotor core 10 rotates. Fig. 8 is a view showing a third embodiment of the present invention, and the description is different from the first embodiment. In this third embodiment, the projections 4 1 are provided in the vicinity of the opening 17c of the insertion hole 17. The projections 4 1 are provided so as to correspond to the accommodating portions 17a and 17b of the insertion holes 17, respectively, and the permanent magnets are inserted before the respective receiving portions 17a and 17b, and protrude toward the outer peripheral side. Thereafter, the permanent magnet 18 is inserted into each of the accommodating portions 17a and 17b, and is bent to push the permanent magnet 18 toward the inner peripheral side. In such a member, the permanent magnets 18 may be positioned at predetermined positions in the respective accommodating portions 17a and 17b. Further, in the above embodiment, the rectangular plate-shaped permanent magnets 18-15-2889965 (12) are assembled to the rotor core 1 〇, but as shown in the fourth embodiment of Fig. 9, the circular arc plate is formed. The plurality of permanent magnets 51 may be assembled to the rotor core 1 〇. At this time, a magnetic pole is formed by a permanent magnet 51. In the above configuration, since the magnetic direction of the permanent magnet 51 is inclined in the circumferential direction, the thickness of the frame 9 can be reduced. Further, the present invention is not limited to the above embodiment, and is modified as follows, for example. The frame is made of plastic. That is, the frame has the function of supporting the rotor core and does not need to function as a back yoke. Therefore, the weight can be reduced by using the frame as a plastic. (Effect of the Invention) As described above, the rotor of the externally-transformed permanent magnet motor of the present invention is incorporated in the rotor core disposed in the outer peripheral portion of the stator, and is provided in the rotor core. The permanent magnet is accommodated in the insertion hole of the outer peripheral side of the rotor core, and the permanent magnet is accommodated in the cross-sectional direction of the V-shaped or approximately circular arc shape. The magnetic direction of the magnet is inclined toward the circumferential direction, and this component can reduce the thickness dimension of the back yoke. Further, the magnetic flux density distribution between the cores is close to the sine wave shape, and the insert torque can be reduced. [Schematic Description] FIG. 1 is an externally transformed permanent magnet of the first embodiment of the present invention - 16 - (13) 1289965 A perspective view of the configuration of the stator of the motor. Fig. 2 is a perspective view showing the configuration of a rotor. Fig. 3 is a transverse sectional view showing the rotor. Fig. 4 is a vertical view showing the rotor taken along the line XI-XI in Fig. 3. Fig. 5 is a longitudinal sectional view showing the rotor taken along the line X2-X2 in Fig. 3. Fig. 6 is a view for explaining a magnetic flux density distribution. Fig. 7 is a view corresponding to Fig. 3 showing a second embodiment of the present invention. Fig. 8 is a view corresponding to Fig. 3 showing a third embodiment of the present invention. Fig. 9 is a view corresponding to Fig. 6 showing a fourth embodiment of the present invention. (Description of the symbol) 1 : Stator 2 : Rotor 9 : Rack 1 〇 : Rotor core Π : Synthetic resin 1 3 : Main plate portion 14 : Annular wall 1 7 : Insertion hole 1 8 : Permanent magnet 17a, 17b : Storage portion 17c : Opening -17- 1289965 (14) 1 9 : recess 2 Ο : through hole
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