512087 經濟部中央標準局員工消費合作社印繁 A7 B7 五、發明説明（1 ) 發明背景 本發明係有關於一種工件機械加工系統用回轉台之夾 緊裝置，且更特別的，係有關於經由將油壓力產生之制動 力’施加至固定的承載該回轉台的一心軸上形成之盤，以 改良在機械加工作業時，用以夾緊一回轉台的一裝置之功 能。 供工件機械加工系統用的回轉台之全體構造係示於圖 1。一直立的心軸3經由軸承而嵌入一底座構架5的中央 孔內。該心軸3的外凸緣3 0，係被同心的容納於形成在 該底座構架5之頂部表面內之圓形凹部內。一回轉台1係 被固定在該心軸3的外凸緣3 0上。即爲，該回轉台1及 該心軸3，以一體的繞著在該底座構架5內的中央孔之軸 線而轉動。一夾緊裝置C P係被配合於該底座構件5內。 該種夾緊裝置的一範例，被揭示於日本專利號碼 He i — 8 — 8028中且示於圖6內。在該底座構架5 內的圓形凹部內，一邊緣形態環形盤3 1 ，自該心軸的外 凸緣3 0之底部區段向外的徑向突出。進一步的，由該回 轉台1之外部周邊區段的底部表面，該環形盤3 1之頂部 表面，該心軸3的外凸緣3 0之主體的外部周邊表面，該 心軸3的外凸緣3 0之主體的內部周邊表面，及在底座構 架-5內之圓形凹部的內部周邊表面，界定出一環形間隙6 。一環7被固定在環形間隙6內的底座構架5。一油室 7 1被形成在該環7內。更特別的’該環7包含了一薄凸 緣區段7 3，自其底部區段向外的徑向突出，及一薄管式 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐）_4 _ (請先閱讀背面之注意事項再域寫本頁) 丨 512087 A7 B7_ 五、發明説明（2 ) 區段7 5，連接該凸緣區段7 3至該環7的主體。該凸緣 區段7 3係適用以與該心軸3的環形盤3 1接觸’且該管 式區段7 5係適用以與該心軸3的外凸緣3 0之外部周邊 表面接觸。前述之油室7 1 ，係由該環7之主體的底部表 面，該凸緣區段7 3，該管式區段7 5，及在底座構架5 內的圓形凹部的內部周邊表面所共同界定。該油室7 1連 接至形成在底座構架5內之一油供應導管（未示於圖）。 每一該凸緣及管式區段73，75的厚度係被設定於一値 ，以容許這些區段由導入該油室7 1內的油之壓力所彈性 變形。在該環7之凸緣區段7 3之外部周邊表面’與在該 底座構架5內之圓形凹部的內部周邊表面之間的界面，係 被適當的密封，以防止高壓油意外的洩漏。 當高壓油被供應至該油室7 1 ，該壓力將該環7的凸 緣區段7 3向下的撓曲，以將該心軸3的盤3 1 ，夾緊於 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再續寫本頁) 其本身與在底座構架5內之圓形凹部的底部表面之間，以 使抑止該心軸3的軸向轉動。同時的，該壓力將該環7的 管式區段7 5向內的撓曲，以使與該外凸緣3 0的主體之 外部周邊表面壓力接觸，並進一步的抗拒該心軸3的軸向 轉動而夾緊該心軸3。 但是，此種傳統的夾緊裝置具有一些缺點。一個問題 是經由該環7的薄管式區段7 5來夾緊該心軸3。當實際 夾緊時，由於該作業元件之不可避免的產生錯誤，作用在 該心軸3上的徑向力在所有徑向方向中不能一致，其結果 被夾緊於軸線的心軸3，或多或少會偏離在該底座構架5 本紙張尺度適用中國國家標準（CNS)μ規格（2i〇x297公釐）-5- 512087 經濟部中央標準局員工消费合作社印製 A7 B7 五、發明説明（3 ) 內之中央孔的軸線。在夾緊時產生之該心軸的徑向偏離， 會造成由固定在心軸3上之回轉台1所支撐的一工作上之 機械加工錯誤。 如前所述，該心軸3之主要的夾緊操作，係由該環7 之薄凸緣區段7 3所進行。於此條件下，在該心軸3之環 形盤3 1與該油室7 1內的油壓力之間的物理關係，係相 對應於一懸臂與一致的作用至該懸臂上之一負載之間的物 理關係。即爲，該環形盤3 1相當於一懸臂，且該油壓力 相當於該負載。由油壓力產生之力，係分散於該環形盤 3 1之全體徑向方向中，該力之分散，造成了該環形盤 3 1之撓曲，因而導致在該心軸3上的不充分夾緊。其結 果’在回轉台1上的心軸3及工件，於機械加工作業時產 生位移’因而在工件上產生機械加工錯誤。爲使提供該凸 緣區段之完善的密封，其厚度必須增加，但該種厚的構造 ’在油壓力維持不變的情況下，造成該凸緣區段7 3的彈 性變形之減少。此種減少的變形，導致不足以抗拒該軸向 轉動，而不能夾緊在該心軸3上。 發明之槪要說明 由習知技術之目前狀態觀之，本發明之主要目的，係 在於一種夾緊系統，其中，經由夾緊一環形盤（形成在固 % 定的承載該回轉台的心軸上），而抗拒該軸向轉動以制動 一回轉台，並經由僅直立的夾緊該環形盤，而施加充分的 制動力於該回轉台上。- I — — -I (請先閱讀背面之注意事項再磺寫本頁) 、1Τ ··. 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -6 - 512087 A7 一 ___B7 五、發明説明（4 ) 依據本發明之基本相態，一底座構架被提供具有一中 央孔，一放大圓形凹部形成在該中央孔的一末端，一心軸 可轉動的嵌入該中央孔且固定的承載該回轉台，一薄的邊 緣形態環形盤，自該底座構架內之圓形凹部中之心軸向外 的徑向突出，一環被固定至該底座構架的圓形凹部內，且 沿著該心軸的環形盤向外的徑向突出，一油室被該底座構 架及該環界定在圓形凹部內，且與一被給予之高壓油來源 連通，一活塞被容納於該油室內，且其位置適用於將該環 夾緊於其本身與該環形盤之間，以使可在該底座構架內的 中央孔之軸線方向內移動，且供應高壓油至該油室內，以 推摘該活塞向著該環形盤而壓擠該環，以使將該環形盤夾 緊於該環與該底座構架之間，該活塞壓擠該環的外部末端 .，且在該活塞與該環之間的壓力接觸表面區域，小於該活 塞接收油壓力的表面區域。 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 經由供應高壓油進入該油室，該活塞被壓擠朝向該環 形盤而移動，該活塞之一縱向末端，經由該環的外部末端 壓擠該環形盤。於此條件下之作用的力之間的物理關係， 係相當於在一懸臂與作用在該懸臂之自由末端的一總負載 之間的物理關係。即爲，該環係相當於該懸臂，且活塞的 壓力係相當於該總負載。該活塞之總壓力僅作用在該環的 徑向外部末端上，且其結果，該環極大的撓曲。其結果， 該環強力的壓擠該環形盤，且該變形的環形盤被強力的夾 緊於該底座構架與該環之間，因而確保了作用在回轉台上 的一大的制動力。 本紙張尺度適用中國國家標準（CNS ) A4規格(210X*297公釐）:Ί · ^ 經濟部中央榡準局員工消費合作社印製 512087 A7 --B7 五、發明説明（5 ) 圖形之簡要說明 圖1係一剖面側視圖，顯示配合依據本發明之夾緊裝 置的供使用在機械加工作業用的回轉台， 圖2係一剖面側視圖，顯示依據本發明之夾緊裝置的 一實施例， 圖3係一剖面側視圖，顯示附屬有該夾緊裝置的一油 供應機構的範例， 圖4係一剖面側視圖，顯示依據本發明之夾緊裝置的 另一實施例， 圖5係一剖面側視圖，顯示依據本發明之夾緊裝置的 其他實施例，及 圖6係一剖面側視圖，顯示一典型的傳統夾緊裝置。 元件符號說明 1 回轉台 2 供應導管 3 垂直心軸 5 底座構架 6 環形間隙 .7 環 —— 、 9 環形活塞 2 1 空氣出口 2 2 柱塞 尺度適用中國國家標準（CNS ) A4規格（210X297公釐)7^: " 衣-- (請先閲讀背面之注意事項再#寫本頁) 訂 ·· 512087 A7 ——^_Ξ___ 五、發明説明（6 ) 3 〇 外凸緣 3 1 環形盤 5 2 底座外蓋 5 3 圓形凹部 7 1 油室 7 2 主體 7 3 凸緣區段 7 4 凸緣區段 7 5 管式區段 9 1 環形突起 9 3 環形突起 較佳實施例之詳細說明 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再楨寫本頁) 依據本發明之夾緊裝置的第一實施例示於圖2，其中 ’一外凸緣3 0係形成在一心軸3上，以使固定該回轉台 1的位置。在大約爲其軸向長度的中間位置，一薄的，邊 緣形態，易於變形之環形盤3 1，自該外凸緣3 0向外的 徑向突出。該環形盤3 1延伸至一緊密的面對一圓形凹部 5 3之內部周邊表面的位置（該圓形凹部5 3係形成在一 底座構架5的頂部表面內）。 —經由該外凸緣3 0的外部周邊表面圓形凹部5 3 之內部周邊表面，該圓形凹部5 3之底部表面與該環形盤 3 1 ，而於該圓形凹部5 3內界定一環形間隙6。一環7 被固定至底座構架5的該環形間隙6內。該環7被提供有 本紙張尺度適用中國國家標準（CNS ) Α4規格（2】〇Χ29*7公釐） 512087 A7 B7 五、發明説明（7 ) 固定至該圓形凹部5 3之底部表面的主體7 2 ，與可脫離 的固定至該主體7 2的頂部表面之凸緣區段7 4。該凸緣 區段7 4向外的徑向延伸至一緊密的面對該圓形凹部5 3 之內部周邊表面的位置。該環7之凸緣區段7 4，係被建 構以使至少局部的與該心軸3的環形盤3 1面接觸。一環 形活塞9被安排在一間隙內（該間隙係位於該環7的主體 7 2之外部周邊表面，與該底座構架5的圓形凹部5 3之 內部周邊表面之間），使可以在底座構架5的中央孔之軸 線方向移動。該環形活塞9的頂部表面具有階式組態。即 爲，該環形活塞9的頂部表面之外部末端，提供了 一環形 突起9 1 ，該突起9 1適用於與該環7之凸緣部份7 4的 外部末端局部的面接觸。該活塞9僅壓擠該環7之外部末 端。該環形活塞9之尺寸，係被選定以使在活塞9與該環 7之間的面接觸區域，變小於該活塞9接受油壓之表面區 域。可在該環7的凸緣區段7 4之底部表面外部末端處， 形成一類似的環形突起，以可選擇的替代在活塞9上的該 環形突起9 1。 經濟部中央標準局員工消费合作社印製 (請先閱讀背面之注意事項再楨寫本頁) J·. 因爲該環‘7由該主體7 2與該凸緣區段7 4可脫離的 互相聯結而製成，以方便於生產，這些元件因而可由不同 材料製成。例如，該凸緣區段7 4可較佳的由高摩擦阻力 之彈性材料製成- 在底座構架5內形成高壓油的一供應導管2 ’與置於 該活塞9之下方的一油室7 1連通。爲使平順的開始供應 該高壓油，在底座構架5內形成一空氣出口 2 1 ’與該油 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐）_ 1 〇 _ 512087 A7 B7 五、發明説明（8 ) 室7 1連通且其出口係由一螺栓形成柱塞2 2所關閉。於 開始供應該高壓油時，移除該柱塞2 2以使易於排出空氣 ，且在完全排出空氣之後’柱塞2 2再次的關閉該出口。 如示於圖2 ，當該高壓油被導入在系統內的油室7 1 時，該活塞9被推擠而向上移動’且壓擠該環7的凸緣區 段7 4之外部末端。由此導致之彈性變形的結果’該凸緣 區段7 4將環形盤3 1夾緊於其本身與一固定在底座構架 5之底座外蓋5 2之間，以制動該心軸3的軸向轉動。於 此，該活塞9的壓力，經由該環形突起9 1而僅作用在該 凸緣區段7 4的外部末端。於此條件下的物理關係，係相 當於作用在一懸臂的外部末端之總負載。因此，該環7之 凸緣區段7 4與該心軸3的環形盤3 1 ，均極大的撓曲， 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再磺寫本頁) 以產生作用在該心軸3上的充分的制動力。當停止該高壓 油的供應，且油室7 1內的壓力降低時，該凸緣區段7 4 與環形盤3 1均回復至其初始位置（由於其自然的彈性） ，且該活塞9被推回至其初始位置（由於該凸緣區段7 4 之自然彈性）。其結果，該環形盤3 1被自該夾緊狀態釋 放。 依據本發明之夾緊裝置的第二實施例示於圖4 ’其中 ，該環7係由一主體7 2與一凸緣區段7 4互相的形成爲 一本體而組成。進一步的，不只該活塞9，於凸緣區段7 4的頂部表面外部末端上亦提供了一環形突起，以供與心 軸3之環形盤31局部的接觸。在活塞9與該環7之凸緣 區段7 4之間的接觸模式，係爲可逆向的。其他之結構係 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）· _ 512087 A7 B7 經濟部中央標準局貧工消費合作社印製 五、發明説明（9 ) 實質上相同於示於圖2中的夾緊裝置。 依據本發明之夾緊裝置的第三實施例示於圖5，其中 ，供固定的承載一回轉台1之外凸緣3 0 ’係形成在心軸 3上。一薄的，易於變形，邊緣形態之環形盤3 1 ，係自 該外凸緣3 0之較低區段向外的徑向突出。該環形盤3 1 延伸至一緊密的面對在該底座構架5內之該圓形凹部5 3 之內部周邊表面的位置。 經由該心軸3的外凸緣3 0之外部周邊表面，在底座 構架5的圓形凹部5 3之內部周邊表面’該回轉台1之底 部表面，及該心軸3的環形盤3 1之頂部表面，而界定一 環形間隙6。一被固定至該底座構件5之頂部表面的一底 座外蓋5 2，被嵌入該環形間隙6，且該環7被固定至該 底座外蓋5 2的內部區段之較低表面。一薄的凸緣區段 7 4自該環7的較低區段向外的徑向延伸，且其外部末端 適用於與該心軸3的環形盤31之外部末端面接觸。 一環形油室7 1形成在該底座外蓋5 2的外部區段內 ，且一環形活塞9被容納於該油室7 1內以供垂直的動作 。該環形活塞9的底部表面，提供有一階式結構。更特別 的，一環形突起9 3係形成在該活塞9之底部表面的外部 末端，而僅接觸該環7的凸緣區段7 4之外部末端。在該 環7與該活塞9之間的局部接勝4莫式係爲可逆向的。即爲 ，可該環7的凸緣區段7 4之頂部表面上，製成一類似的 環形突起。 在該底座構架5內形成高壓油的一供應導管2，其於 本紙痕尺度適用中國國家標準（CNS )Ta4規格（210X297公釐）:12 . ' ^噃_丨 (請先閱讀背面之注意事項再績寫本頁)512087 Employees' Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs of the People's Republic of China A7 B7 V. Description of the Invention (1) Background of the Invention The present invention relates to a clamping device for a turntable for a workpiece machining system. The braking force generated by the oil pressure is applied to a disc formed on a fixed mandrel carrying the turntable to improve the function of a device for clamping a turntable during machining operations. The overall structure of the turntable for a workpiece machining system is shown in FIG. The upright mandrel 3 is inserted into a central hole of a base frame 5 via a bearing. The outer flange 30 of the mandrel 3 is received concentrically in a circular recess formed in the top surface of the base frame 5. A turntable 1 is fixed on the outer flange 30 of the mandrel 3. That is, the turntable 1 and the mandrel 3 rotate integrally around the axis of the central hole in the base frame 5. A clamping device C P is fitted in the base member 5. An example of such a clamping device is disclosed in Japanese Patent No. Hei-8-8028 and is shown in FIG. In the circular recess in the base frame 5, an edge-shaped annular disc 3 1 protrudes radially outward from the bottom section of the outer flange 30 of the mandrel. Further, from the bottom surface of the outer peripheral section of the turntable 1, the top surface of the annular disc 31, the outer peripheral surface of the main body of the outer flange 30 of the mandrel 3, and the convexity of the mandrel 3 The inner peripheral surface of the main body of the margin 30 and the inner peripheral surface of the circular recess in the base frame-5 define an annular gap 6. A ring 7 is fixed to the base frame 5 in the annular gap 6. An oil chamber 71 is formed in the ring 7. More special 'The ring 7 includes a thin flange section 73, which projects radially outward from its bottom section, and a thin tube type. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). _4 _ (Please read the notes on the back before writing this page) 丨 512087 A7 B7_ V. Description of the invention (2) Section 7 5 connects the flange section 7 3 to the body of the ring 7. The flange section 7 3 is adapted to contact the annular disc 31 of the mandrel 3 'and the tubular section 75 is adapted to contact the outer peripheral surface of the outer flange 30 of the mandrel 3'. The aforementioned oil chamber 7 1 is formed by the bottom surface of the main body of the ring 7, the flange section 7 3, the tubular section 7 5, and the inner peripheral surface of the circular recess in the base frame 5. Define. The oil chamber 71 is connected to an oil supply duct (not shown) formed in the base frame 5. The thickness of each of the flange and tubular sections 73, 75 is set at a range to allow the sections to be elastically deformed by the pressure of the oil introduced into the oil chamber 71. The interface between the outer peripheral surface 'of the flange section 73 of the ring 7 and the inner peripheral surface of the circular recess in the base frame 5 is properly sealed to prevent accidental leakage of high-pressure oil. When high-pressure oil is supplied to the oil chamber 7 1, the pressure flexes the flange section 7 3 of the ring 7 downward to clamp the disk 3 1 of the mandrel 3 to the Central Standard Bureau of the Ministry of Economic Affairs. Printed by the employee consumer cooperative (please read the precautions on the back before continuing on this page) between itself and the bottom surface of the circular recess in the base frame 5 so as to inhibit the axial rotation of the mandrel 3. At the same time, the pressure flexes the tubular section 75 of the ring 7 inward so as to make pressure contact with the outer peripheral surface of the body of the outer flange 30 and further resists the shaft of the mandrel 3 It rotates to clamp the mandrel 3. However, such conventional clamping devices have some disadvantages. One problem is the clamping of the mandrel 3 via the thin tube section 75 of the ring 7. When it is actually clamped, due to the inevitable error of the working element, the radial force acting on the mandrel 3 cannot be consistent in all radial directions, and as a result, the mandrel 3 clamped on the axis, or It will deviate more or less from the base frame. 5 This paper size is applicable to the Chinese National Standard (CNS) μ specification (2i0x297 mm) -5-512087 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 5. Invention Description ( 3) The axis of the center hole inside. The radial deviation of the mandrel generated during clamping will cause a machining error on a job supported by the turntable 1 fixed on the mandrel 3. As mentioned before, the main clamping operation of the mandrel 3 is performed by the thin flange section 73 of the ring 7. Under this condition, the physical relationship between the annular disc 31 of the mandrel 3 and the oil pressure in the oil chamber 71 corresponds to a cantilever and a load acting uniformly on the cantilever. Physical relationship. That is, the annular disk 31 is equivalent to a cantilever, and the oil pressure is equivalent to the load. The force generated by the oil pressure is dispersed in the entire radial direction of the annular disc 31, and the dispersion of the force causes the deflection of the annular disc 31, thereby causing insufficient clamping on the mandrel 3. tight. As a result, 'the spindle 3 and the workpiece on the turntable 1 are displaced during the machining operation', and a machining error occurs on the workpiece. In order to provide a perfect seal of the flange section, its thickness must be increased, but the thick structure ′ causes the elastic deformation of the flange section 73 to be reduced while the oil pressure is maintained. This reduced deformation is insufficient to resist the axial rotation and cannot be clamped on the mandrel 3. The invention is described by the current state of the art. The main object of the present invention is a clamping system in which a ring disc (formed at a fixed load bearing spindle) Top), and resist the axial rotation to brake a turntable, and apply sufficient braking force to the turntable by clamping the annular disc only upright. -I — — -I (Please read the precautions on the back before writing this page), 1T ... The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -6-512087 A7 ___B7 5. Description of the invention (4) According to the basic phase of the present invention, a base frame is provided with a central hole, an enlarged circular recess is formed at one end of the central hole, and a mandrel is rotatably embedded in the central hole and fixed. A thin edge-shaped annular disk that carries the turntable projects radially outward from the center of the circular recess in the base frame, and a ring is fixed to the circular recess of the base frame, along the The annular disk of the mandrel protrudes radially outward, an oil chamber is defined in the circular recess by the base frame and the ring, and communicates with a source of high-pressure oil given, and a piston is accommodated in the oil chamber. And its position is suitable for clamping the ring between itself and the annular disk so that it can move in the axial direction of the central hole in the base frame and supply high pressure oil into the oil chamber to push the The piston is pressed towards the annular disk The ring so that the ring disc is clamped between the ring and the base frame, the piston squeezes the outer end of the ring, and the pressure contact surface area between the piston and the ring is smaller than the piston The area of the surface that receives oil pressure. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). By supplying high-pressure oil into the oil chamber, the piston is squeezed and moved towards the annular disk. The ring disk is pressed through the outer end of the ring. The physical relationship between the forces acting under this condition is equivalent to the physical relationship between a cantilever and a total load acting on the free end of the cantilever. That is, the ring system corresponds to the cantilever, and the pressure system of the piston corresponds to the total load. The total pressure of the piston acts only on the radially outer end of the ring, and as a result, the ring is greatly deflected. As a result, the ring strongly presses the ring disk, and the deformed ring disk is strongly clamped between the base frame and the ring, thereby ensuring a large braking force on the turntable. This paper size applies to China National Standard (CNS) A4 (210X * 297mm): Ί · ^ Printed by the Central Consumers' Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 512087 A7 --B7 V. Brief description of the invention (5) Graphic Fig. 1 is a sectional side view showing a turntable for use in machining operations with a clamping device according to the present invention, and Fig. 2 is a sectional side view showing an embodiment of a clamping device according to the present invention. Fig. 3 is a sectional side view showing an example of an oil supply mechanism attached to the clamping device, Fig. 4 is a sectional side view showing another embodiment of the clamping device according to the present invention, and Fig. 5 is a section A side view showing another embodiment of the clamping device according to the present invention, and FIG. 6 is a sectional side view showing a typical conventional clamping device. Description of component symbols 1 Turntable 2 Supply duct 3 Vertical mandrel 5 Base frame 6 Ring gap. 7 Rings-, 9 Ring piston 2 1 Air outlet 2 2 Plunger dimensions apply Chinese National Standard (CNS) A4 specifications (210X297 mm) ) 7 ^: " Clothing-(Please read the precautions on the back before #write this page) Order ·· 512087 A7 —— ^ _ 发明 ___ V. Description of the invention (6) 3 〇Outer flange 3 1 Ring disk 5 2 Base cover 5 3 Circular recess 7 1 Oil chamber 7 2 Main body 7 3 Flange section 7 4 Flange section 7 5 Tubular section 9 1 Ring protrusion 9 3 Ring protrusion Detailed description of the preferred embodiment Printed by the Consumer Standards Cooperative of the Central Bureau of Standards (please read the precautions on the back before writing this page) The first embodiment of the clamping device according to the present invention is shown in Fig. 2, where 'an outer flange 30 is formed in one center The shaft 3 so that the position of the turntable 1 is fixed. At a middle position about its axial length, a thin, edge-shaped, easily deformed annular disc 3 1 projects radially outward from the outer flange 30. The annular disc 31 extends to a position that closely faces the inner peripheral surface of a circular recessed portion 53 (the circular recessed portion 53 is formed in the top surface of a base frame 5). -Through the outer peripheral surface of the outer flange 30, the inner peripheral surface of the circular recess 5 3, the bottom surface of the circular recess 5 3 and the annular disc 3 1, and a ring is defined in the circular recess 5 3 Gap 6. A ring 7 is fixed in the annular gap 6 of the base frame 5. The ring 7 is provided with the paper size applicable to the Chinese National Standard (CNS) A4 specification (2) 0 × 29 * 7 mm) 512087 A7 B7 V. Description of the invention (7) The bottom surface of the circular recess 5 3 is fixed The main body 7 2, and a flange section 74 that is detachably fixed to the top surface of the main body 7 2. The flange section 74 extends radially outward to a position facing the inner peripheral surface of the circular recess 5 3 closely. The flange section 74 of the ring 7 is constructed so as to make surface contact with the annular disk 31 of the mandrel 3 at least in part. An annular piston 9 is arranged in a gap (the gap is located between the outer peripheral surface of the main body 7 2 of the ring 7 and the inner peripheral surface of the circular recess 5 3 of the base frame 5) so that it can be placed on the base The central hole of the frame 5 moves in the axial direction. The top surface of this annular piston 9 has a stepped configuration. That is, the outer end of the top surface of the annular piston 9 is provided with an annular protrusion 9 1 which is adapted to be in partial surface contact with the outer end of the flange portion 74 of the ring 7. The piston 9 only presses the outer end of the ring 7. The size of the annular piston 9 is selected so that the surface contact area between the piston 9 and the ring 7 becomes smaller than the surface area where the piston 9 receives oil pressure. A similar annular protrusion may be formed at the outer end of the bottom surface of the flange section 74 of the ring 7 to replace the annular protrusion 91 on the piston 9 as an alternative. Printed by the Consumers 'Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the notes on the back before writing this page) J .. Because the ring' 7 is detachably interconnected by the main body 7 2 and the flange section 7 4 They are made for ease of production and these elements can therefore be made of different materials. For example, the flange section 7 4 may be preferably made of an elastic material with high friction resistance-a supply duct 2 ′ of high-pressure oil is formed in the base frame 5 and an oil chamber 7 placed below the piston 9 1 connected. In order to smoothly start supplying the high-pressure oil, an air outlet 2 1 ′ is formed in the base frame 5 and the oil paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) _ 1 〇_ 512087 A7 B7 V. Description of the invention (8) The chamber 7 1 communicates and its outlet is closed by a bolt forming plunger 2 2. When the supply of the high-pressure oil is started, the plunger 22 is removed to make it easier to discharge the air, and after the air is completely discharged, the 'plunger 22 closes the outlet again. As shown in Fig. 2, when the high-pressure oil is introduced into the oil chamber 7 1 in the system, the piston 9 is pushed to move upward 'and squeezes the outer end of the flange section 74 of the ring 7. As a result of the resulting elastic deformation, the flange section 7 4 clamps the annular disk 3 1 between itself and a base cover 5 2 fixed to the base frame 5 to brake the shaft of the mandrel 3. To turn. Here, the pressure of the piston 9 acts only on the outer end of the flange section 74 via the annular protrusion 91. The physical relationship under these conditions corresponds to the total load acting on the outer end of a cantilever. Therefore, the flange section 7 4 of the ring 7 and the annular disk 3 1 of the mandrel 3 are greatly deflected and printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before writing) (This page) to generate sufficient braking force on the mandrel 3. When the supply of the high-pressure oil is stopped and the pressure in the oil chamber 71 is reduced, the flange section 7 4 and the annular disc 31 are returned to their original positions (due to their natural elasticity), and the piston 9 is Push back to its original position (due to the natural elasticity of the flange section 7 4). As a result, the annular disk 31 is released from the clamped state. A second embodiment of the clamping device according to the present invention is shown in Fig. 4 '. The ring 7 is composed of a main body 72 and a flange section 74 formed as a body with each other. Further, not only the piston 9 but also an annular protrusion is provided on the outer end of the top surface of the flange section 74, for partial contact with the annular disc 31 of the mandrel 3. The contact pattern between the piston 9 and the flange section 74 of the ring 7 is reversible. Other structures are based on Chinese paper standard (CNS) A4 (210X297 mm). _ 512087 A7 B7. Printed by the Poor Workers Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. 5. The description of the invention (9) is substantially the same as shown in The clamping device in FIG. 2. A third embodiment of the clamping device according to the present invention is shown in FIG. 5, wherein the outer flange 3 0 'of a turntable 1 for fixing is formed on the mandrel 3. A thin, easily deformed, ring-shaped disc 3 1 is projected radially outwardly from the lower section of the outer flange 30. The annular disc 3 1 extends to a position that closely faces the inner peripheral surface of the circular recess 5 3 in the base frame 5. Via the outer peripheral surface of the outer flange 30 of the mandrel 3, the inner peripheral surface of the circular recessed portion 5 3 of the base frame 5 'the bottom surface of the turntable 1 and the annular disk 31 of the mandrel 3 The top surface defines an annular gap 6. A base cover 5 2 fixed to the top surface of the base member 5 is embedded in the annular gap 6, and the ring 7 is fixed to the lower surface of the inner section of the base cover 5 2. A thin flange section 74 extends radially outwards from the lower section of the ring 7 and its outer end is adapted to make surface contact with the outer end of the annular disc 31 of the mandrel 3. An annular oil chamber 71 is formed in the outer section of the base cover 52, and an annular piston 9 is accommodated in the oil chamber 71 for vertical movement. The bottom surface of the annular piston 9 is provided with a stepped structure. More specifically, an annular protrusion 9 3 is formed at the outer end of the bottom surface of the piston 9 and only contacts the outer end of the flange section 74 of the ring 7. The partial win 4 system between the ring 7 and the piston 9 is reversible. That is, a similar annular protrusion can be made on the top surface of the flange section 74 of the ring 7. A supply conduit 2 for high-pressure oil is formed in the base frame 5. The paper mark scale applies the Chinese National Standard (CNS) Ta4 specification (210X297 mm): 12. '^ 噃 _ 丨 (Please read the precautions on the back first Write this page again)
、1T 經濟部中央標準局員工消費合作社印袋 512087 A7 _ B7 五、發明説明（10 ) 接近該活塞9之頂部表面的位置，開啓於該油室7 1內。 類似於示於圖2中的安排方式，該供應導管2較佳的配合 一空氣出口機構。 當高壓油經由該供應導管2而供應至該油室7 1內時 ，該高壓油推擠該活塞9而向下移動，且壓擠該環7的凸 緣區段7 4之外部末端。其結果，該環7變形以將該心軸 3的環形盤3 1 ，夾緊於該凸緣區段7 4與在底座構架5 內之圓形凹部5 3的底部表面之間，以制動該心軸3的軸 向轉動。於此過程中，來自該活塞9的壓力係僅作用在該 凸緣區段7 4的外部末端。此一物理關係，係相當於作用 在一懸臂的自由末端上的總負載。其結果，該凸緣區段 7 4及該環形盤3 1 ，均極大的撓曲以提供一大的制動力 〇 依據本發明，該活塞9之軸向運動產生的制動力，僅 以該心軸3之軸向方向作用在該心軸3上，且沒有任何作 用在心軸3上的徑向力。其結果，在夾緊作業中，該心軸 3不會產生任何徑向偏離，因而可大爲減低工件上的生產 錯誤程度。 進一步的，因爲經由該環7之凸緣區段7 4的壓擠該 心軸3之環形盤3 1 ，係爲作用在一懸臂的自由末端之總 負載的模式，該環形盤極大的撓曲，產生了作用在該心軸 上的充分之制動力。 本紙張尺度適用中國國家標準（CNS ) A4規格（2】0X297公釐） -13- (請先閲讀背面之注意事項再楨寫本頁) 訂 丨·丨、 1T Printed bags for the cooperative of employees of the Central Standards Bureau of the Ministry of Economic Affairs 512087 A7 _ B7 V. Description of the invention (10) The position close to the top surface of the piston 9 is opened in the oil chamber 71. Similar to the arrangement shown in Fig. 2, the supply duct 2 preferably cooperates with an air outlet mechanism. When high-pressure oil is supplied into the oil chamber 71 through the supply duct 2, the high-pressure oil pushes the piston 9 to move downward, and presses the outer end of the flange section 74 of the ring 7. As a result, the ring 7 is deformed to clamp the annular disk 3 1 of the mandrel 3 between the flange section 74 and the bottom surface of the circular recess 5 3 inside the base frame 5 to stop the Axial rotation of the mandrel 3. During this process, the pressure from the piston 9 acts only on the outer end of the flange section 74. This physical relationship is equivalent to the total load acting on the free end of a cantilever. As a result, both the flange section 74 and the annular disk 3 1 are greatly deflected to provide a large braking force. According to the present invention, the braking force generated by the axial movement of the piston 9 is based only on the core. The axial direction of the shaft 3 acts on the mandrel 3 without any radial force acting on the mandrel 3. As a result, the mandrel 3 does not have any radial deviation during the clamping operation, so that the degree of production errors on the workpiece can be greatly reduced. Further, since the annular disk 3 1 of the mandrel 3 is pressed through the flange section 74 of the ring 7, it is a mode of total load acting on a free end of a cantilever, and the annular disk is greatly deflected. A sufficient braking force is generated on the mandrel. This paper size applies to Chinese National Standard (CNS) A4 specifications (2) 0X297 mm -13- (Please read the precautions on the back before writing this page) Order 丨 · 丨