經濟部智慧財產局員工消費合作社印製 584702 五、發明説明（1) 〔發明所屬之技術領域〕 本發明是關於圓筒蝸桿、蝸輪及該等圓筒蝸桿與蝸輪 所成的蝸桿傳動裝置。 〔習知技術〕 蝸桿傳軌機構係利用於直角且不交叉之雙軸間的動力 傳達，如第1 3圖所示，一般是以螺旋狀蝸桿2，及與此 咬合之蝸輪4所構成。 蝸桿傳動機構上，其蝸桿的外型有圓筒型物（single-enveloping worm gears)，及鼓型物（double-enveloping worm gears)，但是圓筒型蝸桿側較鼓型蝸桿，在設計、作業、組 裝等更爲容易，因此一般使用該圓筒型蝸桿的圓筒型蝸桿 傳動機構被廣爲利用。 習知蝸桿2之軸向S 1的剖面，或者齒直角方向S 2 的剖面齒型係如第1 4圖擴大表示，設定具有從節、線P L 僅傾斜α之斜面6的「梯形」。另一方面，蝸輪4是以具 有該梯形之齒型的蝸桿2作爲蝸桿滾齒切刀（基準齒型或 基準齒條）利用滾齒切削法形成所獲得。 〔發明所欲解決之課題〕 但是，上述軸向S 1剖面或者齒直角方向S 2剖面中 ，具有梯形齒型之蝸桿2，及以此蝸桿2作爲滾齒切刀（ 基準齒條）滾齒切削之蝸輪4係如第1 5圖所示，（於蝸輪 中央平面中）蝸桿2與蝸輪4的咬合係形成與平面F1與凸 I I I I I .裝 I I I I 訂 I I - ^ (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -4- 584702 A7 —___B7 ___ 五、發明説明（2 ) 面P 1的接觸，會產生種種的問題。 第16圖是槪念性表示該習知蝸桿2與蝸輪4之咬合 的相對曲率。亦即，利用該平面F 1與凸面P 1接觸的咬 合會形成大的面壓應力，同時潤滑油膜的形成困難，會導 致早期磨損或發熱、效率降低、噪音的增大等的原因。 此一問題係如第1 5圖所示，尤其在咬合的終始端， 形成相對於蝸輪4之蝸桿2之小的相對曲率，因此在該終 始端會有更爲明顯的傾向。 本發明係有鑑於上述習知問題所硏創而成，於蝸桿之 軸向剖面或者齒直角方向剖面中，改良習知當然之所謂的 「梯形」齒型，藉此使蝸桿與蝸輪的咬合形成凹面與凸面 ’提供可降低面壓應力的同時容易形成潤滑油膜，以針對 持久性的提昇、發熱的抑制、效率的提高及降低噪音的蝸 桿、與此咬合之蝸輪，或者該等成對所成的蝸輪傳動裝置 爲課題，尤其可有效地防止因設計諸條件所產生的可能性 之蝸桿與蝸輪間的干涉爲另外之課題。 〔解決課題用之手段〕 本發明係外型爲圓筒型，且軸向剖面或齒直角方向剖 面之齒型爲梯形的圓筒蝸桿中，上述梯形斜邊的直線部份 中，至少將節線至齒末端側的部分置換成使設定在該節線 之齒末端側的滾動圓沿著節線朝齒存在方向滾動所獲得的 擺線曲線，同時將該擺線曲線的起點至預定位置爲止的部 分修正爲相當於該預定位置之該等擺線曲線切線的直線， 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -5- 584702 A7 B7 五、發明説明（3 ) 且從該直線之節線上的交點連續上述節線的齒根側，藉此 解決上述之課題者（申請專利範圍第1項）。 (請先閲讀背面之注意事項再填寫本頁) 又本發明係外型爲圓筒形，且軸向剖面或齒直角方向 剖面的齒型爲梯形的圓筒蝸桿中，於上述梯形之斜邊的直 線部份中，至少將節線至齒根側的部分置換成使設定在該 節線齒根側的滾動圓沿著節線朝齒不存在方向所獲得的擺 線曲線，同時將該擺線曲線的起點以至預定位置爲止的部 分修正爲相當於該預定位置之該等擺線曲線切線的直線， 且從該直線之節線上的交點連續上述節線的齒頂側，藉以 解決上述之課題者（申請專利範圍第2項）。 經濟部智慧財產局員工消費合作社印製 此外，本發明係外型爲圓筒形，且軸向剖面或齒直角 方向剖面的齒型爲梯形的圓筒蝸桿中，於上述梯形之斜邊 的直線部份中，至少將節線至齒末端側的部分置換成使設 定在該節線齒末端側的滾動圓沿著節線朝齒存在方向所獲 得的擺線曲線，·同時將該擺線曲線的起點以至預定位置爲 止的部分修正爲相當於該預定位置之該等擺線曲線切線的 第1直線，另一方面，將節線至齒根側的部分置換成使設 定在該節線齒根側的滾動圓沿著節線朝齒不存在方向所獲 得的擺線曲線，同時將該擺線曲線的起點以至預定位置爲 止的.部分修正爲相當於該預定位置之該等擺線曲線的切線 ，且修正與第1直線平行的第2直線，且將齒末端側與齒 根側沿著節線相對分離，形成連續的第1直線與第2直線 ，藉此解決上述之課題者（申請專利範圍第3項）。 本發明係如上述，即使僅可以因應節線的齒末端側’ 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 584702 A7 ____B7_i__ 五、發明説明（4 ) 或者僅因應齒根側仍可獲得適當的效果。當然也可以運用 於雙方。 ’ (請先閱讀背面之注意事項再填寫本頁) 於開發本發明時，申請人首先以圓筒形的外型，其軸 向剖面或者齒直角方向剖面的齒型形成梯形之圓筒蝸桿中 ，硏創以該梯形斜邊之直線部分的齒末端側或者齒根側置 換成擺線曲線的構造（日本專利特願平1 1 - 1 22857 :現仍然 未公開）。 該構造基本上是利用凹面與凸面的接觸，並且爲「類 似圓與該圓最自然轉動之擺線曲線間的接觸」加以實現， 因此可確保接觸面之兩齒型間大的相對曲率。其結果，可 減小面壓應力的同時，容易形成潤滑油膜，實現持久性的 提昇、發熱的抑制、效率的提昇及噪音的降低等。 但是，該構造係如後述，由於設計各條件可重新確認 出具有發生若干問題的可能性。 經濟部智慧財產局員工消費合作社印製 本發明是爲了消除此一新確認之問題，針對先前未公 知之構造更加以改良者，其結果，如上述採用擺線曲線除 了可獲得原來持久性的提，高、發熱的抑制、效率的提昇及 噪音的降低等效果之外，並同時可避免蝸桿與蝸輪咬合時 的干涉。 此外，如申請專利範圍第3項所記載之發明，以節線 爲界，將本發明運用於齒末端側（齒頂側）及齒根側雙方 時，分別設定不同滾動圓半徑時，即使產生如組裝誤差或 加工誤差，或者動態位移時，仍可更爲順暢地進行蝸桿與 蝸輪間的咬合申請專利範圍第4項）。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） — 584702 A7 B7 五、發明説明（5 ) 申請專利範·圍第1〜4項記載之構成同樣可運用於錯 位系蝸桿申請專利範圍（第5〜8項）。 (請先閱讀背面之注意事項再填寫本頁) 再者，爲了避免上述「干涉」的問題，本發明中，以 切線的關係連續「擺線曲線」與「直線」是考慮咬合的順 暢度與連續性。因此，在擺線曲線的性質上，上述「預定 位置」之直線（切線）的傾斜角α與擺線曲線的滾動圓從 起點至轉動角度丁 h之間，成立Th = 2 · α (α的2倍 )的關係。 ’ 換言之，本發明雖是以（先前未公開習知技術中）節 線（基準線）爲界，以壓力角「零」之擺線曲線形成此一 附近，但是也可以將此修正爲賦予壓力角α的齒型。 根據發明人的追加試驗，該壓力角α，即上述「直線 」與軸平行面形成的角度一旦設定在5度〜40度的範圍 時，確認可獲得最佳的結果（申請專利範圍第9項）。 經濟部智慧財產局員工消費合作社印製 其係由於壓力角α角過小時，不能充分獲得咬合干涉 的抑制效果，且壓力角α過大時，干涉的問題可有效避免 的齒型之直線部分與擺線曲線部分比較相對地會形成較大 ，而採用擺線曲線之本發明原來的效果則會使其相對降低 的原因。並且，更理想的是在1 4度〜3 0度左右的範圍 ，最適當値爲2 0度附近。Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 584702 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a cylindrical worm, a worm gear, and a worm transmission device formed by the cylindrical worm and the worm gear. [Conventional Technology] The worm rail transmission mechanism is used for power transmission between right-angled and non-intersecting double shafts. As shown in Fig. 13, it is generally composed of a spiral worm 2 and a worm wheel 4 engaged with the worm. On the worm drive mechanism, the worms have single-enveloping worm gears and double-enveloping worm gears. However, the side of the worm is more than a drum-shaped worm. It is easier to assemble, etc., so the cylindrical worm transmission mechanism using the cylindrical worm is generally widely used. The conventional cross section of the axial S 1 of the worm 2 or the cross section tooth profile of the right angle S 2 of the worm 2 is shown enlarged in FIG. 14, and a “trapezoid” having an inclined surface 6 inclined only α from the node and line P L is set. On the other hand, the worm wheel 4 is obtained by forming the worm 2 having the trapezoidal tooth profile as a worm hobbing cutter (reference gear profile or reference rack) by a hobbing cutting method. [Problems to be Solved by the Invention] However, in the above-mentioned axial S1 cross section or tooth orthogonal direction S2 cross section, the worm 2 having a trapezoidal tooth shape and the worm 2 as a hobbing cutter (reference rack) hobbing The cutting worm gear 4 is shown in Figure 15 (in the center plane of the worm gear). The engraving system between the worm 2 and the worm gear 4 forms the plane F1 and the convex IIIII. Install IIII Order II-^ (Please read the precautions on the back first (Fill in this page again.) This paper size is in accordance with Chinese National Standard (CNS) A4 (210X 297 mm) -4- 584702 A7 —___ B7 ___ 5. Description of the invention (2) Contact with surface P 1 will cause various problems. Fig. 16 is a graph showing the relative curvature of the engagement between the worm 2 and the worm wheel 4 in a conventional manner. That is, the occlusal contact between the plane F 1 and the convex surface P 1 causes a large surface compressive stress, and at the same time, it is difficult to form a lubricating oil film, which may cause early wear or heat generation, decrease in efficiency, increase in noise, and the like. This problem is shown in FIG. 15. Especially at the end of the occlusion, a small relative curvature with respect to the worm 2 of the worm wheel 4 is formed. Therefore, there is a more obvious tendency at the end. The present invention was created in view of the above-mentioned conventional problems. In the axial section or right-angled section of the worm, the conventionally known "trapezoidal" tooth profile is improved, so that the worm and the worm gear are formed. Concave and convex surfaces provide worms that can easily reduce the surface compressive stress while forming a lubricating film to improve durability, suppress heat generation, improve efficiency and reduce noise, worm gears that engage with them, or these pairs. The worm gear transmission is a subject, and in particular it can effectively prevent the interference between the worm and the worm gear due to the possibility of design conditions. It is another subject. [Means for solving the problem] The present invention is a cylindrical worm with a cylindrical shape and a trapezoidal tooth profile in the axial section or the right-angled section of the tooth. In the straight part of the trapezoidal hypotenuse, at least The part from the line to the end of the tooth is replaced with a cycloid curve obtained by rolling a rolling circle set on the end of the tooth of the pitch line along the pitch line toward the tooth existence direction, and at the same time, the starting point of the cycloid curve reaches a predetermined position Part of the correction is a straight line equivalent to the tangent of the cycloid curve at the predetermined position. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page). Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -5- 584702 A7 B7 V. Description of the invention (3) The tooth root side of the above section line is continued from the intersection of the line section line to solve the above problem (application Patent Scope Item 1). (Please read the precautions on the back before filling this page.) The present invention is a cylindrical worm with a cylindrical shape and a trapezoidal tooth profile in the axial section or the right-angled section of the tooth. In the straight line part, at least the part from the pitch line to the root side of the tooth is replaced with a cycloid curve obtained by making the rolling circle set on the root side of the pitch line along the pitch line toward the tooth non-existent direction. The starting point of the line curve and the part up to the predetermined position are corrected into straight lines corresponding to the tangents of the cycloid curves at the predetermined position, and the tooth tip side of the above-mentioned pitch line is continued from the intersection of the line's pitch line to solve the above-mentioned problem. (Item 2 of the scope of patent application). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs In addition, the present invention is a cylindrical worm with a cylindrical shape and a trapezoidal tooth profile in the axial section or the right-angled section of the tooth. In the part, at least the part from the pitch line to the tooth end side is replaced with a cycloid curve obtained by making the rolling circle set on the tip end side of the pitch line along the pitch line toward the tooth existence direction, and at the same time the cycloid curve From the starting point to the predetermined position, the part is corrected to the first straight line corresponding to the tangent line of the cycloid curve at the predetermined position. On the other hand, the part from the pitch line to the tooth root side is replaced with the one set at the pitch line tooth root. The cycloid curve obtained by the rolling circle on the side along the pitch line toward the non-existence of teeth, and at the same time the starting point of the cycloid curve to a predetermined position. Partially amended to the tangents of the cycloid curves corresponding to the predetermined position And correct the second straight line parallel to the first straight line, and separate the tooth tip side and the tooth root side along the pitch line to form a continuous first straight line and a second straight line, thereby solving the above-mentioned problem (patent application Wai Item 3). The present invention is as described above, even if it can only respond to the tip end side of the pitch line. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 584702 A7 ____B7_i__ 5. The invention description (4) or only the tooth root The side can still get the proper effect. Of course, it can also be applied to both parties. '(Please read the notes on the back before filling this page) When developing the present invention, the applicant first formed a trapezoidal cylindrical worm with a cylindrical shape, the axial section or the tooth profile of the tooth in the right angle direction. To create a structure in which the tooth end side or the tooth root side of the straight part of the trapezoidal hypotenuse is replaced with a cycloid curve (Japanese Patent Application No. Hei 11-1222857: still unpublished). This structure basically uses the contact between the concave surface and the convex surface, and is implemented as "the contact between the similar circle and the cycloid curve of the most natural rotation of the circle", so the large relative curvature between the two tooth profiles of the contact surface can be ensured. As a result, it is possible to reduce the surface compressive stress and easily form a lubricating oil film, thereby achieving durability improvement, heat generation suppression, efficiency improvement, noise reduction, and the like. However, this structure is described later, and it is possible to re-confirm that some problems may occur due to the conditions of the design. The present invention is printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs to eliminate this newly confirmed problem, and to improve the previously unknown structure. As a result, using the cycloid curve as described above can obtain the original persistent improvement. In addition to high, heat suppression, efficiency improvement and noise reduction, it can also avoid interference when the worm and worm gear engage. In addition, as for the invention described in the third patent application scope, when the invention is applied to both the tooth tip side (tooth top side) and the tooth root side with the pitch line as the boundary, when different rolling circle radii are set, For example, during assembly or processing errors, or during dynamic displacement, the occlusion between the worm and the worm gear can be performed more smoothly. This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) — 584702 A7 B7 V. Description of the invention (5) The structure of the patent application and the items described in items 1 to 4 can also be applied to the application of dislocation worms Patent scope (items 5 to 8). (Please read the precautions on the back before filling this page.) Furthermore, in order to avoid the above-mentioned "interference" problem, in the present invention, the continuous "cycloidal curve" and "straight line" in the relationship of tangents are taken into account the smoothness of the occlusion and Continuity. Therefore, in terms of the nature of the cycloid curve, the inclination angle α of the straight line (tangent line) of the "predetermined position" and the rolling circle of the cycloid curve from the starting point to the rotation angle T h form the relationship Th = 2 · α (α 2 times). '' In other words, although the present invention is based on (in the previously-unknown conventional technology) a nodal line (reference line) as a boundary and a cycloid curve with a pressure angle of "zero" forming this vicinity, it can also be modified to give pressure Tooth profile at angle α. According to the inventor's additional test, once the pressure angle α, that is, the angle formed by the "straight line" and the plane parallel to the axis is set in the range of 5 to 40 degrees, it is confirmed that the best result can be obtained (item 9 of the scope of patent application) ). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs because the pressure angle α is too small, the suppression effect of occlusal interference cannot be fully obtained, and when the pressure angle α is too large, the straight part and the pendulum of the tooth profile that can be effectively avoided The reason why the line curve part is relatively large is formed, and the original effect of the present invention using the cycloid curve will cause it to be relatively reduced. In addition, it is more preferable to be in a range of about 14 degrees to 30 degrees, and the most suitable range is around 20 degrees.
此外，將本發明運用在齒末端側即齒根側雙方，且在 齒末端側與齒根側形成不同之擺動的滾動圓半徑時，必須 連接各側的直線，因此會導致節線或沿著基準線上之齒末 端側、齒根側的（從起點）分離距離（後述之d X 1、d X 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） ' -8- 584702 A7 B7 五、發明説明（6 ) 2 )的不一致。 另外，本發明從另一方法表現時，也可以獲得以下的 效果。即「外型爲圓筒形，且軸向剖面或齒直角方向剖面 的齒型形成梯形的圓筒蝸桿中，其特徵爲：上述梯形之斜 邊的直線部份中，剩餘節線（轉位齒輪時爲基準線）與齒 型的交點以至齒末端側（齒根側）之預定位置的部分，該 預定位置至齒末端側（齒根側）具有作爲切線的該預定位 置之上述斜邊的直線部分，將設定在該節線之齒末端側（ 齒根側）的滾動圓置換成沿著節線存在齒的方向上滾動所 獲得之擺線曲線」的效果。 但是，此時擺動的起點並非節線與齒型的交點，而是 形成從該點上升至節線上之齒存在側的位置上。 經濟部智慧財產局員工消費合作社印製 -^1. —.1 · -- - -..... 1 - m - - ii I -衣 ϋ— — 二-is - - 1"^ (請先閱讀背面之注意事項再填寫本頁} 另外，將本發明運用於齒末端側及齒根側雙方時，本 發明也可以獲得以下的結果。即「外型爲圓筒形，且軸向 剖面或齒直角方向剖面的齒型形成梯形的圓筒蝸桿中，其 特徵爲：上述梯形之斜邊的直線部份中，將節線（轉位齒 輪時爲基準線）至齒末端側的部分置換成使設定在該節線 之齒末端側的滾動圓沿著節線朝齒存在方向滾動所獲得的 擺線曲線，同時將節線至齒末端側的部分置換成使設定在 該節線之齒根側的滾動圓沿著節線朝著齒不存的方向滾動 所獲得之擺線曲線，並使分別形成於齒末端側與齒根側之 該擺線曲線沿著節線形成預定量相對分離，修正爲以分別 之共同切線連結兩擺線曲線之節線附近的直線」的效果。 此時，形成相當於此公切接線之傾斜所賦予的壓力角 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -9 - 584702 A7 B7 五、發明説明（7) 。其中皆僅是改變方法表現出本發明而已，實體上皆屬於 本發明技術之範疇。 (請先閱讀背面之注意事項再填寫本頁) 但是，與具有該等擺線曲線及連續此一直線（切線） 之齒型蝸桿成對的蝸輪是以該蝸桿本身作爲蝸桿輪轂，即 可滾齒切削具有基準齒型的基準齒條而獲得。. 如上述形成之蝸桿及蝸輪所成的傳動裝置（申請專利 範圍第1 1項）是至少在.形成擺線曲線的部份中，利用「 凹面與凸面的接觸」，也可以藉「近似於圓與該圓最自然 轉動之擺線曲線間的接觸」加以咬合。 其結果，可形成接觸面之大的相對曲率形成小的面壓 應力，同時可容易形成潤滑油膜，實現持久性的提昇、發 熱的抑制、效率的提高及噪音的降低。 並且，更將節線或基準線附近置換成滿足預定條件的 直線，因此如後述，不致發生咬合後半之干涉問題的發生 〇 經濟部智慧財產局員工消費合作社印製 本發明運用於齒末端側及齒根側雙方時，最具有顯著 的作用效果，但是如上述，僅單側時仍可獲得相對的作用 。本發明運用於齒根側時，（相對於單純的梯形齒型）更 可獲得增大抗負荷的作用效果。 另外，本發明同樣可運用在軸向剖面、齒直角方向剖 面雙方，可獲得大致相同的效果。 〔發明之實施型態〕 根據以下圖示詳細說明本發明之實施型態如下。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -10- 584702 A7 B7 五、發明説明（8 ) 首先，爲易於理解，針對構成本發明起始案之棊礎的 曰本專利特願平1 1 - 1 22857號所揭示之技術（未公開之習知 技術）說明之。 .第4圖是表示關於該特願平1 1 - 1 22857號所揭示技術之 圓筒蝸桿1 2之軸向S 1剖面（參閱第1 3圖）之齒型的 一部份。 該齒型是將上述第1 4圖之梯形齒型中，該梯形斜邊 6的直線部分置換成在節線P L上滾動滾動圓R 1、R 2 所獲得的擺線曲線S Y 1、S Y 2。 現在，設定於節線P L之齒末端側（齒頂側：紙面上 側）存在有滾動圓R 1。將此滾動圓R 1在節線P L上朝 齒存在的方向滾動時，該滾動圓R 1上的點A 1描繪出的 軌跡是例如滾動圓R 1從起點Ο 1僅轉動角度T h 1時形 成A 2的位置，如習知的結果構成擺線曲線S Y 1。 該例中.，習知梯形齒型之斜邊6的直線部份中，將節 線P L至齒末端側（齒 側）置換成該滾動圓R 1上的點 A 1所描繪的擺線曲線S Y 1 ，另一方面，習知之梯形齒 型斜邊6的直線部份中，節線P L至齒根側完全同樣地將 節線P L之齒根側（紙面下側）存在的滾動圓R 2沿著節 線P L上朝齒不存在方向滾動時，置換爲該滾動圓R 2上 之點B 1所蒱繪的軌跡（擺線曲線）S Y 2。並豈，圖中 的點B 2是當滾動圓R 2從起點〇2 (=〇1 )僅轉動角 度Th2 ( = Thl)時點B1移動的位置。In addition, when the present invention is applied to both the tooth tip side and the root tooth side, and the rolling circle radius of the tooth tip side and the tooth root side form different swinging radiuses, it is necessary to connect straight lines on each side. Separation distance (from the starting point) of the end of the tooth and the root of the tooth on the reference line (d X 1, d X described later) This paper size applies to China National Standard (CNS) A4 (210X 297 mm) '-8- 584702 A7 B7 V. Inconsistency of invention description (6) 2). In addition, when the present invention is expressed by another method, the following effects can be obtained. That is, "a cylindrical worm with a cylindrical shape and a trapezoidal tooth profile in the axial or right-angle tooth profile is characterized in that the remaining pitch line (inversion) The reference line when gears) intersects with the tooth profile to a predetermined position on the tooth tip side (tooth root side). The predetermined position to the tooth tip side (tooth root side) has the aforementioned hypotenuse as the tangent line. In the straight part, the rolling circle set on the tooth tip side (tooth root side) of the pitch line is replaced with the cycloid curve obtained by rolling in the direction in which the pitch line has teeth ". However, the starting point of the swing at this time is not the intersection of the nodal line and the tooth profile, but is formed from this point to the position where the tooth exists on the nodal line. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-^ 1. —.1 ·----..... 1-m--ii I-衣 ϋ — — 2 -is--1 " ^ (please first Read the notes on the back and fill out this page} In addition, when the present invention is applied to both the tooth tip side and the tooth root side, the present invention can also obtain the following results: "The shape is cylindrical, and the axial section or In the cylindrical worm with a trapezoidal tooth profile in the profile of the right angle of the tooth, it is characterized in that the straight line portion of the hypotenuse of the trapezoid is replaced with the pitch line (the reference line when indexing the gear) to the tooth tip side. The cycloid curve obtained by rolling the rolling circle set on the tip end side of the pitch line along the pitch line toward the tooth existence direction, and replacing the part of the pitch line to the tip end side of the tooth with the root set on the pitch line The rolling circle on the side is rolled along the pitch line toward the direction where the tooth does not exist, and the cycloid curve formed on the tooth end side and the root side of the tooth forms a predetermined amount of relative separation along the pitch line. Amended to a straight line near the nodal line connecting two cycloidal curves with separate common tangents At this time, the pressure angle given by the inclination of the tangent wiring is formed. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -9-584702 A7 B7 V. Description of the invention (7 ). All of them are just the methods of changing to show the present invention, and all of them belong to the technical scope of the present invention. (Please read the precautions on the back before filling this page.) However, with these cycloid curves and continuous this straight line (Tangent) worm gears with worm gears in pairs are obtained by using the worm itself as the worm hub, which can be obtained by hobbing and cutting a reference rack with a reference tooth profile .. The transmission device formed by the worm and worm gear as described above ( Item 11 of the scope of patent application) is at least in the part forming the cycloid curve, using "concave and convex contact", or "approximately the contact between the circle and the cycloid curve of the most natural rotation of the circle" As a result, a large relative curvature of the contact surface can be formed, a small surface compressive stress can be formed, and at the same time, a lubricant film can be easily formed, which can improve durability, suppress heat generation, The efficiency is improved and the noise is reduced. Furthermore, the vicinity of the nodal line or the reference line is replaced with a straight line that satisfies the predetermined conditions. Therefore, as described later, interference problems in the second half of the bite will not occur. The present invention has the most significant effect when applied to both the tooth tip side and the root side, but as mentioned above, the relative action can still be obtained only on one side. When the invention is applied to the root side, (compared to the simple Trapezoidal tooth type) can also increase the effect of increasing the load resistance. In addition, the present invention can also be applied to both the axial cross section and the tooth orthogonal direction cross section, and approximately the same effect can be obtained. [Implementation Mode of the Invention] According to the following figure The detailed description of the embodiments of the present invention is as follows. This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) -10- 584702 A7 B7 V. Description of the invention (8) First, for ease of understanding, the Japanese version that forms the basis of the initial case of the present invention The technology disclosed in Japanese Patent Application No. 1 1-1 22857 (unknown conventional technology) is described. Figure 4 shows a part of the tooth profile of the axial S 1 section (refer to Figure 13) of the cylindrical worm 12 of the technique disclosed in Japanese Patent Application No. 1 1-1 22857. This tooth profile is obtained by replacing the straight part of the trapezoidal hypotenuse 6 in the trapezoidal tooth profile of Fig. 14 above with the cycloidal curves SY 1 and SY 2 obtained by rolling the circles R 1 and R 2 on the pitch line PL. . Now, a rolling circle R 1 exists on the tip end side (tooth tip side: paper surface side) of the pitch line PL. When this rolling circle R 1 is rolled on the pitch line PL in the direction in which the teeth exist, the trajectory drawn by the point A 1 on the rolling circle R 1 is, for example, when the rolling circle R 1 is rotated by the angle T h 1 from the starting point 0 1. The position at which A 2 is formed constitutes a cycloid curve SY 1 as a conventional result. In this example, in the straight part of the hypotenuse 6 of the conventional trapezoidal tooth profile, the pitch line PL to the tooth tip side (tooth side) is replaced with a cycloid curve drawn by point A 1 on the rolling circle R 1 SY 1, on the other hand, in the straight part of the conventional trapezoidal toothed hypotenuse 6, the pitch line PL to the root side of the tooth is exactly the same as the rolling circle R 2 existing on the root side (the lower side of the paper surface) of the pitch line PL. When scrolling along the pitch line PL in the direction of non-existence of the teeth, it is replaced with a trajectory (cycloid curve) SY 2 drawn by a point B 1 on the scroll circle R 2. Moreover, the point B 2 in the figure is a position where the point B 1 moves when the rolling circle R 2 is rotated by an angle Th2 (= Thl) from the starting point 〇2 (= 〇1).
該例中，滾動圓R 1及R 2的半徑是以m爲模組、N 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） --------\衣-- (請先閱讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -11- 584702 A7 B7 五、發明説明（9 ) 爲正的常數時，同時設定N · m。因此，該第1實施型態 之齒型是相對於節線P L上的起點0 3 (二〇 1 = 〇 2 ) 形成點對稱。 另外，常數N係可對應模組本身的値及減速比於設計 時設定適當値。定性値係當模組m越大時則越大。 第7圖是表示齒末端側與齒根側不同的圓半徑之例。 該例中，設定齒根側之滾動圓R 4的半徑N 2 · m大 於齒末端側（齒頂側）之滾動圓R 3的半徑 Nl.m(Nl-m<N2-m)。即，N1<N2。 第8圖是組裝上述第4圖之蝸桿12及蝸輪14時， 產生組裝誤差e時之擴大誤差表示。 以節線P L爲界設定其齒末端側與齒根側之滾動圓 R 1、R 2的同一半徑値時，假設大於組裝誤差（含加工 誤差、或者運轉時的動態位移的槪念）e 1的範圍時，在 齒末端側（箭頭表示之D 1 )蝸桿1 2與蝸輪1 4會有產 生干涉之虞。 該第7圖的例中，由於齒根側之滾動圓R 4的半徑 N 2 · m與齒末端側之.滾動圓R 3的半徑N 1 · m比較設 定成較大，因此如第9圖所示，即使大於組裝誤差e 1的 設定範圍時，仍可以在相當的範圍內防止蝸桿2 2與蝸輪 2 4間之齒根側（箭頭表示之D 2 )的干涉。 • 但是，將本發明之蝸桿實際成品化的過程中，本案發 明人更加以進行試驗•硏究之中，更對上述第4圖或者第 7圖所示加以硏創，僅擺線曲線所形成的齒型在節線附近 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ——*-------;衣-- (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -12- 584702 A7 __B7 五、發明説明（1〇) 的壓力角大致是形成零，因此，根據設定的諸條件，如第 1 〇圖或第1 1圖所示，尤其在蝸桿1 2與蝸輪1 4之咬 合後半的領域SI(S2)中，重新確認出會有干涉產生 的疑慮。 此外，第1 0圖是表示沿第1 3圖箭頭X — X線之蝸 輪1 4的剖面。蝸桿（圖示省略）是從圖左側的箭頭W 1 側開始與蝸輪1 4的咬合而朝W 2側脫離，使該蝸輪1 4 朝與第1 0圖的紙面垂直方向移動若干。第1 〇圖是擴大 表示此時尤其在咬合後半所產生的干涉。又，第11圖是 表示利用未公開之習知技術（節線附近的壓力角度）的基 準齒條滾動之相當於第1 0圖箭頭X 1表示之剖面位置的 蝸輪齒型。 第1圖是表示解除此一問題用所硏創之本發明一實施 •例的齒型，第2圖爲其齒末端側之擴大圖。 本實施型態中，本發明可因應任意之齒末端側、齒根 側。即，上述第1 4圖表示之梯形斜邊的直線部分6之中 •，將節線P L至齒末端側部分置換成設定於該節線P L之 齒末端側的滾動圓R 1 (半徑r 1 )沿著節線P L朝齒存 在方向滾動所獲得的擺線曲線S Y 1，同時將此擺線曲線 SY 1的起點Ο 1至預定爲至Q 1爲止的部分，修正爲相 當於該預定位置Q 1之該等擺線曲線S Y 1切線的第1直 線L 1。又預定的位置Q 1在第2圖中是以座標（X η + d X，Υ η )表示。 另一方面，節線P L至齒根側，同樣置換成使設定在 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） , '哀-- (請先閱讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -13- 584702 A7 B7 五、發明説明（11) 節線P L之齒根側的滾動圓R 2 (半徑r 2 = r 1 )沿著 節線P 1朝著齒不存在的方向滾動所獲得的擺線曲線 S Y 2，同時將此擺線曲線S Y 2的起點Ο 2至預定爲至 Q 2爲止的部分，修正爲相當於該預定位置Q 2之該等擺 線曲線S Y 2的切線，同時修正與第1直線L 1平行的第 2直線L 2。此外，在節線P L與該直線L 1的交點〇3 上，將齒末端側與齒根側沿著節線P L相對分別以d X 1 (d X 2 )，合計僅2 d x 1量分離，使齒末端側的齒型 與齒根側的齒型連續，即連續該第1直線L 1與第2直線 L 2。 再者，直線L 1、L 2係相當於預定位置Q 1、Q 2 之切線，可藉擺動的性質使起點Ο 1、0 2的轉角T h 1 (二T h 2 )及直線L 1、L 2與軸平行面Y形成的角度 αΐ ( = α2)之間，成立 Thl=Th2 = 2*al = 2 · α 2的關係。當然，該角度α 1、α 2爲此一位置（ Q1〜〇3〜Q2)之壓力角。 具體的設計是連結齒末端側與齒根側用之分離距離 d X 1 (二d 2 )可以從以下關係式求得。 (rl-rl · cosThl) · tanal— Xnl〜 (1 )In this example, the radii of the rolling circles R 1 and R 2 are based on m as the module and N. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -------- \ clothing- (Please read the precautions on the back before filling out this page) Order printed by the Intellectual Property Bureau's Consumer Cooperatives of the Ministry of Economic Affairs-11- 584702 A7 B7 5. When the invention description (9) is a positive constant, set N · m at the same time. Therefore, the tooth profile of the first embodiment forms a point symmetry with respect to the starting point 0 3 (201 = 〇 2) on the pitch line PL. In addition, the constant N can be set to appropriate 对应 for the module's own 设定 and reduction ratio during design. Qualitatively, the larger the module m is, the larger it is. FIG. 7 shows an example of a circle radius different from the tooth tip side and the tooth root side. In this example, the radius N 2 · m of the rolling circle R 4 on the root side of the tooth is set to be larger than the radius N 1 .m (Nl-m < N2-m) of the rolling circle R 3 on the tip side (tooth top side) of the tooth. That is, N1 < N2. Fig. 8 is an enlarged error indication when an assembly error e occurs when the worm 12 and the worm wheel 14 of Fig. 4 are assembled. When the same radius 値 of the rolling circles R 1 and R 2 of the tooth tip side and the tooth root side is set with the pitch line PL as the boundary, it is assumed that it is greater than the assembly error (including machining error or the concept of dynamic displacement during operation) e 1 When the range is within the range of the tooth end (the D 1 indicated by the arrow), the worm 12 and the worm wheel 14 may interfere with each other. In the example of FIG. 7, the radius N 2 · m of the rolling circle R 4 on the root side and the radius N 1 · m of the rolling circle R 3 on the tooth tip side are set to be larger in comparison with each other. As shown, even when it is larger than the setting range of the assembly error e 1, it is possible to prevent interference between the root side (D 2 indicated by the arrow) between the worm 22 and the worm wheel 24 within a considerable range. • However, during the actual finished product of the worm of the present invention, the inventors of the present case have carried out more experiments and researches. In addition, they have made further innovations as shown in Figure 4 or 7 above, and only formed by the cycloid curve. The tooth shape is near the pitch line. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) —— * -------; clothing-(Please read the precautions on the back before filling this page ) Order printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-12- 584702 A7 __B7 V. The pressure angle of the description of the invention (10) is approximately zero. Therefore, according to the set conditions, such as Figure 10 or Figure 1 As shown in FIG. 1, especially in the area SI (S2) in the second half of the engagement between the worm 12 and the worm wheel 14, it is reconfirmed that there is a possibility of interference. Fig. 10 is a cross section of the worm wheel 14 taken along the arrow X-X line in Fig. 13. The worm (not shown) is engaged with the worm wheel 14 from the arrow W 1 side on the left side of the figure, and disengages toward the W 2 side, so that the worm wheel 14 moves slightly in a direction perpendicular to the paper surface in FIG. 10. Fig. 10 is an enlarged view showing the interference that occurs especially in the second half of the occlusion at this time. Fig. 11 is a worm gear profile corresponding to the cross-sectional position indicated by arrow X1 in Fig. 10, showing the rolling of a reference rack using an undisclosed conventional technique (pressure angle near the pitch line). Fig. 1 shows a tooth profile of an embodiment of the present invention created to solve this problem, and Fig. 2 is an enlarged view of a tooth tip side. In this embodiment, the present invention can be applied to any tooth tip side and tooth root side. That is, in the straight part 6 of the trapezoidal hypotenuse shown in FIG. 14 described above, the pitch line PL to the tooth tip side portion is replaced with a rolling circle R 1 (radius r 1) set on the tooth tip side of the pitch line PL ) Cycloidal curve SY 1 obtained by rolling along the pitch line PL in the direction of tooth existence, and at the same time, the portion from the starting point θ 1 of the cycloidal curve SY 1 to the predetermined to Q 1 is corrected to correspond to the predetermined position Q The first straight line L 1 of the tangent line SY 1 of the cycloid curve SY 1. The predetermined position Q 1 is represented by coordinates (X η + d X, Υ η) in FIG. 2. On the other hand, the pitch line PL to the root of the tooth is also replaced by setting the paper size to the Chinese National Standard (CNS) A4 specification (210X297 mm), 'wai-(Please read the precautions on the back before filling This page) Order printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-13- 584702 A7 B7 V. Description of the invention (11) Rolling circle R 2 (radius r 2 = r 1) along the root side of the pitch line PL The cycloid curve SY 2 obtained by rolling the line P 1 in a direction in which the teeth do not exist, and at the same time, correct the portion from the starting point θ 2 of the cycloid curve SY 2 to Q 2 to the predetermined position Q The tangents of the trochoidal curves SY 2 of 2 are corrected at the same time as the second straight line L 2 parallel to the first straight line L 1. In addition, at the intersection θ3 of the pitch line PL and the straight line L 1, the tooth tip side and the tooth root side are respectively separated along the pitch line PL by d X 1 (d X 2), and a total of only 2 dx 1 is separated. The tooth profile on the tooth tip side is continuous with the tooth profile on the tooth root side, that is, the first straight line L 1 and the second straight line L 2 are continuous. Moreover, the straight lines L 1 and L 2 are tangent lines corresponding to the predetermined positions Q 1 and Q 2. The turning angle T h 1 (two T h 2) of the starting points 0 1 and 0 2 and the straight lines L 1 and L 2 can be made by the nature of the swing. The relationship between the angle α α (= α2) formed by L 2 and the axis-parallel plane Y is Thl = Th2 = 2 * al = 2 · α 2. Of course, the angles α 1 and α 2 are pressure angles of this position (Q1 ~ 〇3 ~ Q2). The specific design is that the separation distance d X 1 (two d 2) for connecting the tip side and the root side of the tooth can be obtained from the following relationship. (rl-rl · cosThl) · tanal— Xnl ~ (1)
Xnl = rl *Thl-rl · sinThl …（2 ) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） I-------------衣 II (請先閲讀背面之注意事項再填寫本頁〕 -訂 經濟部智慧財產局員工消費合作社印製 -14- 經濟部智慧財產局員工消費合作社印製 584702 A7 __’___B7__ 五、發明説明（斤 rl-Thl=(Thl/2；r)*2；r:rl (3) 擺線曲線s Y 1、S Y 2係將切螺紋用圓錐工具或齒 型硏磨用磨石根據其形狀預先成型，藉此可以習知之加工 方法的應用獲得。 並且，將鍋桿1 2的齒末端部（齒頂部）1 2 Α與節 線f L平行切斷處理，或者可對齒根部1 2 B進行適當之 圓角處理。 本發明形成實質的齒型部分具有擺線曲線+預定直線 的特徵，尤其對於不影響咬合的齒末端部（齒頂部）及齒 根部的形狀/或者加工處理不加以限制。 如上述設定•製作蝸桿時，蝸輪是以此蝸桿爲滾齒切 •刀，即可以藉著與習知相同的方法滾齒切削製作基準齒型 (基準齒條12A:參閱第3圖）。Xnl = rl * Thl-rl · sinThl… (2) This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) I ------------- clothing II (please read first Note on the back, please fill out this page again]-Order printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-14-Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 584702 A7 __'___ B7__ V. Description of the invention (jin rl-Thl = ( Thl / 2; r) * 2; r: rl (3) Cycloid curve s Y 1 and SY 2 are pre-shaped according to the shape of the conical tool for cutting thread or the grinding stone for tooth honing according to its shape, so that you can learn about it The application of the processing method is obtained. In addition, the tooth end portion (tooth top portion) 1 2 A of the pot rod 12 is cut parallel to the pitch line f L, or the root portion 1 2 B can be appropriately rounded. The invention forms a substantial tooth profile that has the characteristics of a cycloid curve + a predetermined straight line. In particular, there is no restriction on the shape and / or processing of the tooth tip (tooth top) and tooth root that do not affect the bite. Set as above • When making a worm , The worm gear uses this worm as a hobbing cutter. The method of making a reference hob cutting tooth (reference rack 12A: see FIG. 3).
I 其次說明作用如下。 ‘ ‘ 首先，第5圖是表示（相當於習知的第1 5圖）以齒 型爲擺線曲線時之蝸輪中央平面的蝸桿12與蝸輪14間 的咬合狀態。如第5圖表示，該蝸桿1 2與蝸輪1 4的咬 合式形成凹面F 2與凸面P2、凹面F 3與凸面P 3的接 觸，因此相對於該蝸桿1 2之蝸輪1 4之相對曲率的槪念 圖（相當於第1 6圖的槪念圖）係如第6圖所示。 如第6圖所詳示，相對於此實施型態之蝸桿1 2之蝸 輪1 4的相對曲率半徑基本上與習知之第1 0圖所示，形 成非常的大，而兩者1 2、1 4的面壓應力與習知的面壓 本紙張尺度逍用中國國家標隼（CNS ) A4規格（210X297公釐） ----------^-------IX—-----i (請先閲讀背面之注意事項再填寫本頁) -15- 584702 A7 B7 五、發明説明（13) 應力比較則格外的小。 並且，由於設定相當於蝸桿1 2之實質的齒型部分爲 擺線曲線S Y 1、S Y 2 ’因此兩者1 2、1 4可以極爲 順應的狀態咬合，可非常順暢地滑動。 ' 其結果，（由於凹面與凸面的接觸）隨著潤滑油膜容 易形成，可格外提高抗磨損性，又可降能源損失的降低抑 制發熱，同時可提高相對量的效率。更可以降低震動與噪 音。 此外，該實施型態中，藉著相當於僅距離2 · d X分 離的2條擺線曲線S Y 1、S Y 2之公切接線的直線L 1 、L 2形成節線P L附近的齒型，因此從咬合開始至完成 爲止可避免干涉問題的產生。以第1 2圖表示作爲壓力角 2 0度滾齒切削之蝸桿的齒型可供參考。與上述第1 1圖 比較可確認其不致產生干涉。 •另外，上述實施型態中，以本發明作爲軸向之剖面上 的構成，本發明也可以作爲齒直角方向之剖面上的構成， 可獲得大致相同的效果。 經濟部智慧財產局員工消費合作社印製 I — - ·1 - ! I I .^^1 -- I -- 二 n m — 1^1 "、v" (請先閲讀背面之注意事項再填寫本頁) ' 又，上述實施型態中，皆是針對未轉位之蝸桿及蝸輪 所作之說明，但是本發明同樣可運用於錯位的蝸桿。 此時，例如設定與節線平行的基準線，只需考慮將上 述內容之「節線」置換成該「基準線」即可。 當然，此時可以同樣僅將基準線的齒末端側或者齒根 側設定爲擺線曲線+預定直線，同樣可以齒末端側及齒根 側改變滾動圓的半徑。 本^張尺度適用中國國家標準（CNS ) A4規格（210X297公楚) -16- 584702 經濟部智慈財產局員工消費合作社印製 Α7 Β7I Secondly, the function is as follows. ‘‘ First, FIG. 5 shows the state of engagement between the worm 12 and the worm wheel 14 in the center plane of the worm wheel when the tooth profile is a cycloid curve (corresponding to the conventional FIG. 15). As shown in FIG. 5, the worm 12 and the worm wheel 14 are engaged with each other to form the contact between the concave surface F 2 and the convex surface P2, and the concave surface F 3 and the convex surface P 3. Therefore, relative to the relative curvature of the worm wheel 14 of the worm wheel 12 The thought image (equivalent to the thought image of Fig. 16) is shown in Fig. 6. As shown in FIG. 6 in detail, the relative curvature radius of the worm wheel 12 and the worm wheel 14 of this embodiment is basically the same as that shown in the conventional FIG. 10, which forms a very large radius. 4 face pressure stress and the conventional face pressure This paper size is free from the Chinese National Standard (CNS) A4 specification (210X297 mm) ---------- ^ ------- IX— ----- i (Please read the notes on the back before filling out this page) -15- 584702 A7 B7 V. Description of the invention (13) The stress comparison is exceptionally small. In addition, since the substantial tooth profile corresponding to the worm 12 is set as the cycloid curves S Y 1 and S Y 2 ′, the two 1 2 and 1 4 can be engaged in an extremely compliant state and can slide very smoothly. As a result, (because of the contact between the concave surface and the convex surface), with the easy formation of the lubricating oil film, the abrasion resistance can be greatly improved, the energy loss can be reduced, the heat generation can be suppressed, and the relative amount of efficiency can be improved. It can also reduce vibration and noise. Furthermore, in this embodiment, the straight lines L 1 and L 2 of the tangent connection of the two trochoidal curves SY 1 and SY 2 which are separated by a distance of only 2 · d X form a tooth profile near the pitch line PL, Therefore, interference problems can be avoided from the beginning to completion of the occlusion. Figure 12 shows the tooth profile of the worm as a hob cutting with a pressure angle of 20 degrees for reference. It can be confirmed that it does not cause interference by comparison with Fig. 11 above. In addition, in the above-mentioned embodiment, the present invention is used as the configuration in the axial cross-section, and the present invention can also be used as the configuration in the cross-section of the tooth at right angles to obtain substantially the same effect. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs I —-· 1-! II. ^^ 1-I-Two nm — 1 ^ 1 ", v " (Please read the precautions on the back before filling this page ) 'Moreover, in the above embodiments, the descriptions are made with respect to the worm and the worm wheel which are not indexed, but the present invention can also be applied to the worm which is misaligned. In this case, for example, to set a reference line parallel to the nodal line, it is only necessary to consider replacing the "nodal line" with the "reference line" described above. Of course, at this time, only the tooth tip side or the tooth root side of the reference line can be set to a cycloid curve + a predetermined straight line, and the radius of the rolling circle can also be changed at the tooth tip side and the tooth root side. This standard is applicable to China National Standard (CNS) A4 specification (210X297). -16- 584702 Printed by the Consumer Cooperatives of the Intellectual Property Office of the Ministry of Economic Affairs Α7 Β7
五、發明説明（V 〔發明效果〕 根據本發明與以往比較可非常順暢地進行蝸桿與蝸輪 間的咬合，獲得面壓應力的降低、抗磨損性的提昇、發熱 的抑制、效果的提高或者噪音的降低等效果，且不論各種 諸條件的値爲何，具有可防止在蝸桿與蝸輪間干涉產生的 .效果。. 〔圖式之簡單說明〕 第1圖是表示本發明第1實施型態之蝸桿軸向剖面之 節線附近齒型的部分剖視圖。 第2圖是擴大第1圖的節線至齒末端側（齒頂側）表 示之部分擴大剖面圖。 第3圖是表示具有同一齒型之基準齒條一部份的部分 軸剖面圖。 第4圖是表示本發明未公開習知技術之蝸桿軸向剖面 的齒型之部分剖視圖。 第5圖是表示上述未公開習知技術之蝸桿及以該蝸桿 爲滾齒切刀所形成之蝸輪之蝸輪中央平面的咬合狀態，相 當於第15圖之軸向剖面圖。 第6圖係槪念表示上.述未公開習知技術之蝸桿與蝸輪 咬合時的相對曲率之相當於第1 6圖的槪念圖。 第7圖是表示上述未公開習知技術之變形例之蝸桿軸 向剖面的齒型相當於第4圖之部分剖面圖。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） ---------袭------------^ (請先閲讀背面之注意事項再填寫本頁) 584702 A7 B7 五、發明説明（15) 第8圖係於第4圖之未公開習知技術之蝸桿與蝸輪的 組合中，擴大表示當組裝誤差形成設定以上値時有發生之 虞的不當狀況之部分剖面圖。 第9圖係表示於第7圖之未公開習知技術之蝸桿與蝸 輪的組合中，即使組裝誤差形成設定以上値時也不容易發 生不當狀況之部分剖面圖。 第1 0圖係表示於未公開習知技術中有發生可能之「 干涉」之蝸輪的部分軸直角剖面。 第1 1圖是表示相同干涉狀態之蝸輪的齒型滾齒切削 圖。 第1 2圖是利用本發明第1圖之實施型態的蝸桿製成 之基準齒條（第3圖）滾齒切削的蝸輪之相當於第1 1圖 的齒型滾齒切削圖。 第1 3圖是表示習知蝸桿與蝸輪的咬合狀態之部分剖 面前視圖。 第1 4圖爲習知蝸桿軸向剖面之齒型（部分顯示）部 分剖視圖。 經濟部智慧財產局員工消費合作社印製 H· ·—I I —II I - · -衣 I : i I - n ! I (請先閱讀背面之注意事項再填寫本頁) 第1 5圖是表示習知梯形齒型的蝸桿與蝸輪咬合狀態 之部分剖視圖。 第16圖是表示習知蝸桿與蝸輪咬合時之相對曲率的 槪念圖。 〔符號說明〕 6 梯形齒型的斜邊 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -18- 584702 A7 B7 五、發明説明（16) 經濟部智慧財產局員工消費合作社印製 1 2 蝸 桿 1 4 蝸 輪 P L 節 線 R 1 〜R 4 滾 動 圓 S Y 1〜 S Y 4 擺 線 曲 線 Q 1 、Q 2 預 定位 置 L 1 、L 2 直 線 a 1 、a 2 壓 力 角 〇 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -19-V. Description of the invention (V [Effect of the invention] According to the present invention, the meshing between the worm and the worm wheel can be performed very smoothly compared with the past, and the reduction of the surface pressure stress, the improvement of the abrasion resistance, the suppression of heat generation, the improvement of the effect, or noise can be obtained. And other effects, regardless of the various conditions, it has the effect of preventing interference between the worm and the worm wheel. [Simplified description of the drawing] Fig. 1 shows the worm of the first embodiment of the present invention. Partial cross-sectional view of the tooth profile near the pitch line of the axial section. Figure 2 is a partially enlarged cross-sectional view showing the pitch line of Figure 1 enlarged to the tooth tip side (tooth top side). Figure 3 shows the same tooth profile. A partial axial cross-sectional view of a part of a reference rack. Fig. 4 is a partial cross-sectional view showing a tooth profile of an axial section of a worm according to a conventional technique not disclosed in the present invention. The engraved state of the worm gear center plane of the worm gear formed by using the worm as a hobbing cutter corresponds to the axial cross-sectional view of Fig. 15. Fig. 6 shows the meaning of the above description. The relative curvature when the rod and the worm gear are engaged corresponds to the schematic diagram of Fig. 16. Fig. 7 shows a tooth profile of the axial section of the worm corresponding to a modification of the above-mentioned unpublished conventional technique, which corresponds to a partial section of Fig. 4 Figure. This paper size applies to China National Standard (CNS) Α4 specification (210 × 297 mm) --------- Attack ------------ ^ (Please read the notes on the back first (Fill in this page again) 584702 A7 B7 V. Description of the invention (15) Figure 8 is the combination of the worm and the worm wheel of the undisclosed conventional technology shown in Figure 4, which expands to show that it will happen when the assembly error is more than the setting. Partial cross-sectional view of the improper situation of Yu. Fig. 9 is a partial cross-sectional view of the combination of a worm and a worm wheel of the undisclosed conventional technology shown in Fig. 7, which is unlikely to cause an improper condition even when the assembly error is set above the threshold. Fig. 10 is a partial axial right-angle cross section of a worm wheel that may cause "interference" in the undisclosed conventional technology. Fig. 11 is a cutting diagram of tooth hobbing of a worm wheel showing the same interference state. Fig. 2 is a worm using the embodiment of Fig. 1 of the present invention The finished reference rack (Fig. 3) is a worm gear that cuts gears and is equivalent to the tooth-shaped hobbing diagram of Fig. 11. Fig. 13 is a partial cross-sectional front view showing a conventional worm and worm gear meshing state. Figure 14 is a partial cross-sectional view of the tooth profile (partially shown) of the conventional axial section of the worm. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs H ·· —II —II I-· -yi I: i I-n! I (Please read the precautions on the back before filling out this page) Figures 1 and 5 are partial cross-sectional views showing the state of engagement between a worm and a worm wheel of a known trapezoidal tooth profile. Figure 16 shows the relative curvature of the worm when it is engaged with a worm wheel [Symbols] 6 The trapezoidal edges of the trapezoidal tooth profile The dimensions of this paper are applicable to the Chinese National Standard (CNS) A4 (210X 297 mm) -18- 584702 A7 B7 V. Description of the invention (16) Wisdom of the Ministry of Economic Affairs Printed by the employee's consumer cooperative of the property bureau 1 2 Worm 1 4 Worm gear PL pitch line R 1 to R 4 Rolling circle SY 1 to SY 4 Cycloid curve Q 1, Q 2 Predetermined positions L 1, L 2 Line a 1, a 2 Pressure Angle 〇 ( Matters to read the back of the note and then fill in this page) This paper scale applicable Chinese National Standard (CNS) A4 size (210X 297 mm) -19-