200529948 玖、發明說明： 【發明所屬之技術領域】 特別是指一種彎管機的 本發明是有關於一種彎管機 變速送料裝置。 5 10 15 20 【先前技術】 目的，且為了符合 需較慢，而彎管後 上都設有變速送料 一般的彎管機是為了達到管件彎曲 加工的需求’是使得進料管時的速度 的送料速㈣需較快。且-般的弯管: 裝置以符合上述的加工需求。 U申請案號第9 2 2 0 2 8 3 1，幸™…，… 之頂而μ π 8 0 1唬案），是裝設在一機会200529948 (1) Description of the invention: [Technical field to which the invention belongs] In particular, the present invention relates to a pipe bending machine. The present invention relates to a variable speed feeding device for a pipe bending machine. 5 10 15 20 [Previous technology] Purpose, and in order to meet the need for slower, the pipe bender is equipped with variable speed feeding after the pipe bend to meet the demand of pipe bending process. The feeding speed should be faster. And-like elbow: device to meet the above processing requirements. U Application No. 9 2 2 0 2 8 3 1, fortunately ™…,… and μ π 8 0 1), is installed at a chance
、 ，且可驅動一管件>VL兮趟A 該變速送料裝置i包含—動：：口的長方向產生位移。 -動力軸2〇1的第二、動力Γ、—對應該動力源2之 離合哭3 电磁離合态3、-併設在該第-電墙 雕口為3 —側的第二電磁 哭 離合哭3 . 口 、一衣設在該第一電磁 时3 —側的第—游 齒輪單元5盥第Φ #輪早兀5及-裝設在第-游星 6。 3之間的第二游星齒輪單元 —環齒輪505、叙Γ…^穴巧一乐一太陽輪501、 輪505之門的设在該第一太陽輪5〇1與該第一: ϋ 4的弟—游星輪502、一受节簟笙匕 ，動的第-游星臂架5G3及—^二『―游星輪 底部的輪出輪5〇4。今第》〇5又在^ —游星臂架 該第1卿合* ^ 齒輪單元6具有一對』 。。3的第二太陽輪6〇1 '—第二環右 200529948 4、數㈣在該第二太陽輪⑷與該第二環 間的弟二游星輪㈤及-受該等第二游星輪6 = ^星臂架603，其中該第二游星臂架肩3係騎Γΐ 除輪501固接。 ，、落弟一太 呈⑽狀態，且第二電磁離合 即可透過:第源2之動力軸201輸出動力， 第二、-游星奸μΓ53之吸磁作用而將動力傳遞該 f 以驅動該輸出輪504產生_ ι〇 15 20 2轉動，且使該變速送料裝置帶動管件進行慢速之^ 相反地，當該第二電磁離合器4呈健狀態，且第_ =合器3呈。FF狀態時，該動力源2之動力 =力過一上傳動輪組7傳遞至該第二電磁離合 用該第二電磁離合器4之吸磁作用再利用； 將動力傳遞至該第二游星臂架6。3，因該第二 齒：：：與該第一太陽輪501固接，故藉該第一游星 輸出輪咖產生快速之轉動，且使該 枓衣置帶動管件進行快速之送料動作。 變兮利用該第一、二電磁離合器3、4的切換可改 失丫輪出輪504的轉速及送料速度，但是其仍存在下列缺 配二二t、下傳動輪組?、8分別是以-皮帶W 難=1輪702、802所構成，而該等皮帶7〇ι、謝的 差且具彈性，在動力傳輸時容易使得第一、二游星齒 200529948 輪單元5、6的該等齒輪產生背隙（back lash)，且出力 愈大、背隙就會相對放大，容易影.響送料精度，尤其在彎 5 10 ^乍業中，般的送料精度要求為± 〇. 1 mm，若精度不佳則 所’曾製的彎管尺寸就會不準確。 二、該變速送料裝置為了達到變速目的，是在該動力 動力軸201所對應的轴線上設置該第一電磁離合器3、第 游星齒輪單元5及該第二游星齒輪單元6，另外，又在 该動力軸201軸線一側平行地設有該第二電磁離合器*及 上、下傳動輪組7、8。整體之體積大、佔用空間亦大。 ▲三、該第-、二電磁離合器3、4價格昂貴、成本較 而，且緊㈣置在該第-電磁離合器3下方的第二游星齒 輪單元6不能作潤滑，否則容易影響該第-電磁離合器3 的吸磁效果，故零件的維護較麻煩。 15 四、該變速送料裝置只有【發明内容】 二段變速，功能並不佳。 因此，本發明之目的， 積小、造價便宜更可達到三 置。 即在提供一種可減少背隙且體 段變速之彎管機的變速送料裝 20 台、-設置在該機台頂面上的導滑單元、 沿一長方向送料位移的夹制單元及-固設在Γ機 且平行該導滑單元的齒條1㈣u 頂 滑單元上的底座及-固設在該底座上且、可將== 定位的套管件’該變速送料裝置是裝設在該失 200529948 座上並包含有—動力源、 動力源具有-動力輪出轴 換早70及一減速單元。該 —側，並I古—Μ切換單几是裝設在該動力源 該動力輪出轴連同轴間隔設置在該殼體内部且受 一丄::轉:輪、—與該等主™置且 產生滑動的切換件、一可連動該轉轴並可沿該轉軸 及一可可驅動該切換件產生滑動的掣動件 於：動㈣動件之驅動件，該等主動輪的齒數比不等 ίο 15 遞二=具有數對應該等主動輪的傳遞輪，該等傳 ^的^數比亦不等於―，該切換件在一第一位 盆 件驅動而移至_第二位合，该切換件受該掣動 置守，该傳遞輪與該主動輪分離， 且另一個傳遞輪則盥所斟 單元是裝設在該切換二主一。該減速 π側，亚具有一受該轉軸連動的 與該入力轴對應設置的出力軸，該出力軸呈有 一與該齒條。餐合的擎動輪。藉此，驅動該切換單元之掣動 件產生位移’即可撥動該切換件，且改變該轉軸及該入力 軸的轉速，且達到送料變速之目的。 【實施方式】 有關本發明之前述及其他技術内容、特點盥 以下配合參考圖式之二較佳實施例的詳細說明中，將可清 楚的明白0 月 如圖3、圖4與圖5所示，本發明弯管機2〇〇的變速 送料裝置100之第一較佳實施例，該彎管機2〇〇更包含一 機台21G、-設置在該機台21G頂面且沿—長方向^伸 20 200529948 的導滑單元2 2 0、一可帶勤一其瓜 g件230沿該長方向X送料 位移的夾制單元240及一固机少& 平別及固5又在該機台210頂面且平行該 導滑單元220的齒條250，該夹制單元24〇具有一跨置在 該導滑單元220上的底座26〇及1設在該底座26〇上且 可將該管件23〇束妓位的套管件27G。該導滑單元22〇 可為市售的線性滑軌組，該變速送«置_是裝設在該 夾制單元240之底座260上，並包含有—動力源1〇、一裝 設在該動力源1G-側的切換單元2()及_裝設在該切換單 元20 —側的減速單元3〇。 ίο 15 本實施例的動力源10是以馬達為例，並具有-轴線 垂直方；機台210頂面的動力輸出軸11。 該切換單元2G具有-殼體2卜_容設在該殼體21内 部且固設在該動力輸出軸u上的大主動輪22、一盥該動 力輸出軸11固接且與該大主動輪22同轴間隔設置的小主 動輪23、—與該動力輸出軸11平行設置且轴設在該殼體 内部的轉軸24、一對應該大、小主動輪22、23而沿該 轉軸24之一軸線產生滑動並可連動該轉轴24產生轉動的 切換件25、-可驅動該切換件25產生滑動的掣動件^及 一可驅動該掣動件2 6之·動件2 7。 該大、小主動輪22、23分別為-大、小正齒輪，且 齒數比不等於一。 該轉軸24具有數環設在一外周面的栓塊 該切換件25具有對應該大、小主動輪22、23的一小、 大傳遞輪251、252、-套設在該轉軸24外部且與該小、 20 200529948 大傳遞輪251、252固結成一體的軸套如及二設置在該 小、大傳遞輪251、252相對端面上的潤滑元件254。該小、 大傳遞輪251、252分別為一小、大正齒輪，其等齒數比 亦不等於-，且可適時與該大、小主動輪Μ產生傷 合。該軸套253 -内周面環設有可與該轉轴24之检塊241 欲合的栓槽255，-外周面與該小、大傳遞輪25i、251的 相對端面共同界定出—容置空間256,該潤滑元件254是 以平面軸承為例。 10 15 20 X箄動件26疋製成板塊狀，並具有一嵌套在該容置 空間256中且與該切換件連結的連結端部261及-伸設在 。亥谷置空間256外部的掣動端部gw。 本實施例的驅動件27是以壓力叙為例，且且有一穿 設在該殼體21外部的叙體271及—伸設在該殼體21内部 且可與_，件26之掣動端部撕連結的活塞桿272。 «速單it 30具有—受該轉軸24連動且軸設在該殼 :^部的人力軸31及—與該人力軸“相反設置的出 33 力軸&具有—與該齒條25G舊合的擎動輪 该減速早元30可採用游星式齒輪減速箱。 再如圖5所^當該切換件25在—第— 大傳遞輪252與所對應的小主動輪2 動= 10的動力輸出軸u輪屮“ 士 西。1田動力源 同牛被值叙 時，該大、小主動輪22、23 间步被傳動，且該大主動 驅動該大傳遞輪252及=24=^ 傳遞輪252固結成一 4產生減速轉動，且與該大 豆◊軸套253、小傳遞輪251則利用 10 200529948 該潤滑元件254的設置而可相對於 的轉動’且利用該轉軸24可將動力;$ =:產。生:順 一與該齒條—合，可進行慢速 二:2?示，當.f管後需快速進給送料時，即可啟動 二且桿272相對於該-體⑺作縮入之動 :=切換件25受該擎動件26驅動而移至—第二位 置，則大傳遞輪252與該小主動鈐 251則與所對應的大主動輪㈤二’且小傳遞輪 10 15 的動力輸出軸η輸出動力，=:時，該動力源10 μ大主動輪22則驅動該小傳 =;及轉轴24產生增速轉動，且利用該轉轴24可將 錢速皁元3〇’最後則利用掣動輪33與該齒 ㈣合’可進行快速進給送料目的。 因此，本發明利用該切換件25之切換操作，即可達 到減速彎管作業及增速送料之目的，且具有下列功效： -、該切換單元2G内部具有剛性佳的大、小主動輪 =23及小、大傳遞輪251、252，故在動力傳輸時較不 :易產生背隙’即使出力增加、背隙也不會受到影響，且 k不送料精度’所彎製的彎管尺寸較準確。 一、該切換粒2G未設置電磁離合H，且只以切換 件25之位移即可達到變速目的，不僅整體之體積小、佔 用空間亦小。 、 三、本發明未設置電磁離合器，故成本較低，且大、 小主動輪22、23及小、大傳遞輪251、252及其他部件可 20 200529948 順利進行潤滑操作，故零件的維護較簡易。 再如圖7所示，本發明笫-音# 弟一男轭例之變速送料裝置 100’包含有-動力源π、-裝設在該動力源1G，一侧的切 換單元20,及-裝設在該㈣單元2G，—側的減速單元 30’。該動力源10，與上述實施例相同，且該切換單元2〇, 的轉軸24,是與該減速單元30,的入力軸31， ίο 15 20 該切換單⑽，具有-具有較多齒數之大^輪22,、 一設於該大主動輪22,下方且具有較少齒數的小主動輪23, 及一介於該大、小主動輪22，、23,之間的中間主動輪231，。 該切換件25,也具有-可適時與該大主動輪&，產生嚷合且 具有較少齒數的小傳遞輪251，、—設於該小傳遞輪Μ 下方且可適時與該小主動輪23,產生嗜合的大傳遞輪况， 及一介於該小、大傳遞輪251，、252，之間且可適時與該中 間主動輪231’嚅合的中間傳遞輪257,。 如圖7所示，當該切換# 25，在一第一位置時，該大 傳遞輪252’與所對應的小主動輪23，屬合，即可且利用該 轉軸24’可直接將動力透過該人力軸31，而傳遞至該減速單 凡30’，且利用該小主動輪23，與該大傳遞輪π〗，之配合， 可達到減速目的，以進行重負荷彎管作業。 再如圖8所示，當啟動該驅動件27,之活塞桿272，相 對於該缸體271，作第—段的縮人動作，錢該切換件25, U拏動件26驅動而移至_第二位置時’則大傳遞輪脱， 與该小主動輪23’分離’且中間傳遞輪257’則與所對應的 中間主動輪23卜齧合。此時，該動力源1〇,的動力輪出轴 12 200529948 11輪出動力，該中間 及幸奎細9/1, 動軏231，則驅動該中間傳遞 及（轴24,產生減 輕負荷彎管作業或送料作業相—中間速度，以進行 :如圖9所示，當啟動該驅動件27，之活 對方；该缸體271，作第-p AA w 相 ^^一又的鈿入動作，且使該切換件25， 叉该掣動件26,驅動而移至— 午巧 257,㈣中…弟二位置時，财間傳遞輪 _ 動輪231，分離，且小傳遞輪251,則盘所對 應的大主動輪22,嚅合。此砗，1叙+ 斤對 U，於中w + 力源1〇,的動力輸出軸 ίο 15 20 ' °亥大主動輪22,則驅動該小傳遞輪251，及轉 =4 業產生增速轉動’亦可達到增速目的，可進行快速送 較， 因此，本發明第二實施例與習用之變速送料裝置相 具有三段變速功能。 " 歸納上述，本發明之彎管機的變速送料裝置，不僅構 造簡單、體積小，且整體成本較低，又可達到三段變速之 目的，故確實能達到發明之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請^利 範圍及發明說明書内容所作之簡單的等效變化與修斜，皆 應仍屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是現有一種彎管機之變速送料裝置的裝气示立 圖； 圖2是該變速送料裝置之剖面示意圖； 13 200529948 圖3是一平面組合圖，說明本發明彎管機的變速送料 裝置的一第一較佳實施例； 圖4是本發明上述較佳實施例之一俯视圖； 圖 圖5是本發明上述較佳實施例之一局部放大示意 說明該變速送裝置包含-動力源、-切換單元及-減 速單元； 圖6疋本發明上述較佳實施例之一操作示意圖，說明 -亥切換單元彳呆作切換至一快速送料之狀態； 10 15 圖7是本發明之彎管機的變速送料裝置之一第二較 佳實施例的一組合剖面示意圖； 圖8疋本發明第二較佳實施例之一操作示意圖，說明 該切換單元操作城至_巾間速度送料之狀態；及 上圖9是本發明第二較佳實施例之另一操作示意圖，說 /切換單元操作切換至一快速送料之狀態。 14 200529948 【圖式之主要元件代表符號簡單說明】 200 彎管機 255 栓槽 210 機台 256 容置空間 X 長方向 26 掣動件 220 導滑單元· 261 連結端部 230 管件 262 掣動端部 240 央制單元 27 驅動件 250 齒條 271 缸體 260 底座 272 活塞桿 270 套管件 30 減速單元 100 變速送料裝置 31 入力軸 10 動力源 32 出力轴 11 動力輸出轴 33 掣動輪 20 切換單元 100’ 變速送料裝置 21 殼體 10， 動力源 22 小主動輪 11， 動力輸出軸 23 大主動輪 20， 切換單元 24 轉轴 22， 大主動輪 241 栓塊 23， 小主動輪 25 切換件 231’ 中間主動輪 251 小傳遞輪 24， 轉軸 252 大傳遞輪 25， 切換件 253 軸套 25Γ 小傳遞輪 254 潤滑元件 252’ 大傳遞輪 15 200529948 257, 26, 27, 271， 中間傳遞輪 272’ 活塞桿 掣動件 30， 減速單元 驅動件 31， 入力轴 缸體 16, And can drive a tube > VL 兮 行 A The variable-speed feeding device i includes a movement: displacement in the longitudinal direction of the mouth. -The second, power Γ, of the power shaft 201,-the clutch cry 3 corresponding to the power source 2 3, the electromagnetic clutch state 3,-and the second electromagnetic cry clutch 3 located on the 3rd side of the-electric wall carving opening The first and second gears are located on the 3rd side of the first electromagnetic time. The first wheel gear unit 5 is the first wheel 5 and the first wheel 6 is installed on the first wheel. The second planetary gear unit between 3—the ring gear 505, the syllable ... ^ Xiao Qiaoyileyi Sun Wheel 501, the door of the wheel 505 is located on the first sun gear 501 and the first: ϋ 4 The younger brother—the Star Cruiser 502, a festival savage dagger, the first-Star Cruiser Arm 5G3 and the second wheel—the wheel-out wheel 504 at the bottom of the Star Cruiser. Today, "05" is again in the "Star Traveler Arm." The 1st gear unit 6 has a pair of gear units. " . 3 of the second sun wheel 601′—the second ring right 200529948 4. Number two star star wheel between the second sun wheel and the second ring, and—by the second star wheel 6 = ^ Star boom 603, wherein the shoulder of the second star boom 3 is fixed on the Γΐ except wheel 501. As soon as Luodi is in a sloppy state, and the second electromagnetic clutch can pass through: the power shaft 201 of the second source outputs power, and the second, the magnetic attraction effect of the travel star μΓ53 transmits the power to drive the f The output wheel 504 generates _ 15215 2 rotation, and causes the variable-speed feeding device to drive the pipe to slow speed. Conversely, when the second electromagnetic clutch 4 is in a healthy state, and the _ = three-way clutch 3 is shown. In the FF state, the power of the power source 2 = force is transmitted through the upper transmission wheel set 7 to the second electromagnetic clutch and the magnetic absorption of the second electromagnetic clutch 4 is reused; the power is transmitted to the second star arm 6.3. Because the second tooth :: is fixedly connected to the first sun gear 501, the first travelling star output wheel coffee is used to produce a fast rotation, and the jacket is driven to cause the pipe to perform a fast feeding action. . The change of the first and second electromagnetic clutches 3 and 4 can be used to change the rotation speed and feeding speed of the output wheel 504 of the Ya wheel, but it still has the following missing two t, the lower transmission wheel set ?, 8 respectively. -The belt W is difficult to be composed of 702 and 802 wheels, and these belts are poor and flexible, which makes it easy to make the first and second travel star teeth 200529948 wheel units 5 and 6 during power transmission. The gear produces a backlash (back lash), and the greater the output, the backlash will be relatively enlarged, which is easy to affect the feeding accuracy. Especially in the bending 5 10 ^ industry, the general feeding accuracy requirement is ± 〇. 1 mm, If the accuracy is not good, the size of the previously produced elbow will be inaccurate. 2. In order to achieve the purpose of speed change, the variable speed feeding device is provided with the first electromagnetic clutch 3, the first planetary gear unit 5 and the second planetary gear unit 6 on the axis corresponding to the power shaft 201. In addition, On the side of the axis of the power shaft 201, the second electromagnetic clutch * and the upper and lower transmission wheel sets 7, 8 are provided in parallel. The overall volume is large and the space occupied is also large. ▲ Third, the first and second electromagnetic clutches 3 and 4 are expensive and relatively costly, and the second planetary gear unit 6 located immediately below the first electromagnetic clutch 3 cannot be lubricated, otherwise it is easy to affect the first- Because of the magnetic absorption effect of the electromagnetic clutch 3, maintenance of parts is troublesome. 15 Fourth, the variable-speed feeding device has only [invention content] two-stage variable-speed, the function is not good. Therefore, the purpose of the present invention is to achieve a small size and a low manufacturing cost. That is, in providing a variable-speed feeding device capable of reducing a backlash and a section-variable pipe bending machine,-a guide sliding unit provided on the top surface of the machine, a clamping unit for feeding displacement in a long direction, and-a solid The base provided on the Γ machine and parallel to the rack 1㈣u top sliding unit of the guide sliding unit and the sleeve piece fixed on the base and capable of positioning == The variable speed feeding device is installed in the lost 200529948 The seat contains-a power source, a power source with-a power wheel out of the shaft to change early 70 and a reduction unit. The side and the ancient-M switching unit are installed in the power source. The output shaft of the power wheel is placed inside the housing together with the shaft interval and is subject to :: 转: 轮 、 — 与 等 主 ™ A sliding switching member is provided, a sliding member capable of interlocking with the rotating shaft and capable of sliding along the rotating shaft and a driving member capable of driving the switching member to generate the sliding member is: the driving member of the movable member, and the gear ratio of the driving wheels is not equal. Waiting for 15: 2nd pass = a transmission wheel with a number corresponding to the active wheels, and the number ratio of the transmission ^ is not equal to ―, the switching member is driven in the first position and moves to the second position, The switch is guarded by the trigger, the transmission wheel is separated from the driving wheel, and the other transmission wheel is installed in the switch two main one. On the decelerating π side, the sub-axis has an output shaft corresponding to the input shaft which is linked by the rotating shaft, and the output shaft is provided with the rack. Folding engine wheel. By this, driving the switching member of the switching unit to cause displacement 'can dial the switching member, and change the rotation speed of the rotating shaft and the input shaft, and achieve the purpose of variable speed of feeding. [Embodiment] In the detailed description of the above-mentioned and other technical contents and features of the present invention with reference to the second preferred embodiment of the reference drawing, it will be clearly understood that FIG. 3, FIG. 4 and FIG. 5 The first preferred embodiment of the variable speed feeding device 100 of the pipe bending machine 200 of the present invention, the pipe bending machine 2000 further includes a machine 21G, which is arranged on the top surface of the machine 21G and along the long direction. ^ Extension 20 200529948 guide unit 2 2 0, a clamping unit 240 that can take a lot of work and 230 pieces along the long direction X feeding displacement, and a fixed machine less & flat and solid 5 again in the machine The top surface of the table 210 is parallel to the rack 250 of the guide sliding unit 220. The clamping unit 24 has a base 26 and a base 26 on the guide sliding unit 220. Tube piece 23G tube piece 27G. The guide sliding unit 22 can be a commercially available linear slide group. The variable speed transmission device is installed on the base 260 of the clamping unit 240, and includes-a power source 10, one installed in the The switching unit 2 () on the power source 1G side and the reduction unit 30 installed on the switching unit 20 side. 15 The power source 10 of this embodiment is a motor as an example, and has a-axis perpendicular to the power source shaft 11 on the top surface of the machine 210. The switching unit 2G has a casing 2 and a large driving wheel 22 housed inside the casing 21 and fixed on the power output shaft u, and a power driving shaft 11 fixed to the power driving shaft 11 and connected to the large driving wheel. 22 Coaxially spaced small driving wheels 23, a rotating shaft 24 arranged parallel to the power output shaft 11 and the shaft is arranged inside the housing, a pair of large and small driving wheels 22, 23 and one of the rotating shafts 24 The switching element 25 is capable of sliding along the axis and can be linked with the rotating shaft 24 to generate rotation, a detent member ^ which can drive the detent member 25 to produce a slide, and a detent member 27 which can drive the detent member 26. The large and small driving wheels 22 and 23 are-large and small spur gears, respectively, and the gear ratio is not equal to one. The rotating shaft 24 has a number of bolts arranged on an outer peripheral surface. The switching member 25 has a small and large transmission wheel 251, 252, corresponding to the large and small driving wheels 22, 23, and is set on the outside of the rotating shaft 24 and is connected with The small, 20 200529948 large transmission wheels 251, 252 are consolidated into a single shaft sleeve, and two lubricating elements 254 are provided on opposite end faces of the small, large transmission wheels 251, 252. The small and large transmission wheels 251 and 252 are small and large spur gears, respectively, and their equal gear ratios are not equal to-, and they can be combined with the large and small driving wheels M in time. The sleeve 253-the inner peripheral surface ring is provided with a bolt groove 255 which can be fitted with the inspection block 241 of the rotating shaft 24,-the outer peripheral surface and the opposite end surfaces of the small and large transmission wheels 25i, 251 are jointly defined-accommodation Space 256, the lubricating element 254 is a flat bearing as an example. The 10 15 20 X-moving member 26 is formed in a plate shape, and has a connecting end portion 261 nested in the accommodating space 256 and connected to the switching member, and-extends at. The latching end gw outside the Haigu space 256 is provided. The driving member 27 of this embodiment is an example of pressure narration, and has a narrative body 271 penetrating outside the casing 21 and-extending inside the casing 21 and can be connected with the _, member 26 Partially tear the connected piston rod 272. «Speed sheet it 30 has—the human shaft 31 which is linked by the rotating shaft 24 and the shaft is provided in the shell: and the output shaft 33 which is opposite to the human shaft " has the same as the rack 25G The deceleration early wheel 30 can use a planetary gear reducer. As shown in Fig. 5 ^ when the switch 25 is in the-first-large transmission wheel 252 and the corresponding small driving wheel 2 power = 10 power output Axis u wheel 屮 "Taxi. When the Tiantian power source is equated with the ox, the large and small driving wheels 22 and 23 are driven in steps, and the large driving drives the large transmission wheel 252 and = 24 = ^ the transmission wheel 252 is consolidated into a 4 to generate deceleration rotation. And the soybean shaft sleeve 253 and the small transmission wheel 251 can be rotated relative to the setting of the lubricating element 254 using 10 200529948 ', and the rotation shaft 24 can be used to generate power; $ =: production. Health: Shunyi and the rack—combined, slow speed 2: 2 can be shown. When the .f tube needs fast feed and feed, you can start the second and the rod 272 retracts relative to the body. : = The switching member 25 is moved to the second position by the driving of the engine 26. Then, the power of the large transmission wheel 252 and the small driving wheel 251 and the corresponding large driving wheel 2 ′ and the small transmission wheel 10 15 When the output shaft η outputs power, =: the power source 10 μ large driving wheel 22 drives the small transmission =; and the rotating shaft 24 generates increased speed rotation, and using the rotating shaft 24, the money speed can be reduced to 3 ′. Then, the detent wheel 33 is engaged with the teeth to perform fast-feeding and feeding purposes. Therefore, in the present invention, the switching operation of the switching member 25 can be used to achieve the purpose of decelerating pipe bending and increasing the speed of feeding, and has the following effects:-The switching unit 2G has large and small driving wheels with good rigidity = 23 And small and large transfer wheels 251, 252, so it is less in power transmission: backlash is easy to produce 'even if the output is increased, the backlash will not be affected, and k does not feed accurately' The size of the bent pipe is more accurate . 1. The switching particle 2G is not provided with the electromagnetic clutch H, and the shifting purpose can be achieved only by the displacement of the switching member 25, which not only has a small overall volume but also takes up a small space. Third, the present invention is not provided with an electromagnetic clutch, so the cost is low, and the large and small driving wheels 22, 23 and the small and large transmission wheels 251, 252 and other components can be smoothly lubricated, and the maintenance of parts is relatively simple. . As shown in FIG. 7, the speed-change feeding device 100 ′ of the 笫-音 # younger yoke example of the present invention includes-a power source π,-a switching unit 20 installed on the power source 1G, and-installation In this grate unit 2G, the reduction unit 30 'on the-side. The power source 10 is the same as the above-mentioned embodiment, and the rotating shaft 24 of the switching unit 20 ′ is the input shaft 31 of the reduction unit 30 ′. 15 20 The switching unit has a large number of teeth. The wheel 22, a small driving wheel 23 provided below the large driving wheel 22 and having a small number of teeth, and an intermediate driving wheel 231 between the large and small driving wheels 22, 23. The switching member 25 also has a small transmission wheel 251 that can be combined with the large driving wheel & in a timely manner, and has a small number of teeth, and is provided below the small transmission wheel M and can be connected with the small driving wheel in a timely manner. 23. An affixed large transfer wheel condition is generated, and an intermediate transfer wheel 257, which is between the small and large transfer wheels 251, 252, and can be coupled with the intermediate driving wheel 231 'in a timely manner. As shown in FIG. 7, when the switch # 25 is in a first position, the large transmission wheel 252 ′ is matched with the corresponding small driving wheel 23, and the power can be directly transmitted through the rotation shaft 24 ′. The manpower shaft 31 is transmitted to the deceleration unit 30 ', and the small driving wheel 23 is used in conjunction with the large transmission wheel π to achieve deceleration for heavy-duty pipe bending. As shown in FIG. 8, when the driving member 27 is actuated, the piston rod 272 is retracted in the first step relative to the cylinder 271, and the switching member 25 and the driving member 26 are driven to move to In the second position, 'the large transmission wheel is disengaged, separated from the small driving wheel 23', and the intermediate transmission wheel 257 'is engaged with the corresponding intermediate driving wheel 23b. At this time, the power source of the power source 10, the power wheel out of the shaft 12 200529948 11 wheels power out, the intermediate and Xing Kui fine 9/1, 軏 231, then drive the intermediate transmission and (shaft 24, generating a load-reducing elbow Operation or feeding operation phase-intermediate speed to perform: as shown in Fig. 9, when the drive member 27 is activated, the other party is activated; the cylinder 271 performs the -p AA w phase ^^ one by one indentation action, And the switching member 25, the fork 26, and the driving member 26 are driven to move to — Wuqiao 257, Langzhong ... When the second position, the financial transmission wheel _ moving wheel 231, separated, and the small transmission wheel 251, then The corresponding large driving wheel 22 is combined. Here, 1 Syria + kg pair U, Yuzhong w + power source shaft 10, power output shaft 15 20 '° The large driving wheel 22 drives the small transmission wheel 251, and the rotation speed of the industry can increase the speed, and can also achieve the purpose of speed increase and fast feed comparison. Therefore, the second embodiment of the present invention and the conventional variable speed feeding device have a three-stage speed change function. The variable-speed feeding device of the pipe bender of the present invention is not only simple in structure, small in size, and low in overall cost, but also can reach three stages The purpose of speed change can indeed achieve the purpose of the invention. However, the above are only preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited by this, that is, the scope of application of the present invention and The simple equivalent changes and tilt corrections made in the description of the invention should still fall within the scope of the patent of the present invention. [Brief description of the drawings] FIG. 1 is a gas loading vertical view of a conventional variable speed feeding device of a pipe bender. Figure 2 is a schematic cross-sectional view of the variable-speed feeding device; 13 200529948 Figure 3 is a plan combination view illustrating a first preferred embodiment of the variable-speed feeding device of the pipe bender of the present invention; Figure 4 is the above-mentioned preferred implementation of the present invention A top view of one example; FIG. 5 is a partial enlarged schematic illustration of one of the above-mentioned preferred embodiments of the present invention. The transmission device includes a power source, a switching unit, and a reduction unit. FIG. 6 is the above-mentioned preferred embodiment of the present invention. One of the operation diagrams, illustrating the state of the switching unit to switch to a fast feeding state; 10 15 FIG. 7 is a second preferred embodiment of the variable speed feeding device of the pipe bender of the present invention A combined cross-sectional schematic diagram; FIG. 8 is an operation schematic diagram of one of the second preferred embodiments of the present invention, illustrating a state in which the switching unit operates the speed feeding between the towel and the towel; and FIG. 9 is a diagram of the second preferred embodiment of the present invention. Another operation diagram, said / switching unit operation is switched to a fast feeding state. 14 200529948 [Simplified explanation of the main symbols of the drawings] 200 pipe bender 255 bolt slot 210 machine 256 accommodating space X long direction 26 switch Actuator 220 Guide unit · 261 Connecting end 230 Pipe fitting 262 Actuating end 240 Control unit 27 Drive 250 Rack 271 Cylinder block 260 Base 272 Piston rod 270 Bushing 30 Reduction unit 100 Variable speed feeding device 31 Power input shaft 10 Power source 32 Output shaft 11 Power output shaft 33 Actuating wheel 20 Switching unit 100 'Variable speed feeding device 21 Housing 10, Power source 22 Small driving wheel 11, Power output shaft 23 Large driving wheel 20, Switching unit 24 Rotating shaft 22, Large Driving wheel 241 Bolt 23, Small driving wheel 25 Switching member 231 'Middle driving wheel 251 Small transmission wheel 24, Rotating shaft 252 Large transmission wheel 25, Switching piece 253 Shaft sleeve 25Γ Small transmission wheel 254 Lubricating element 252 'Large transmission wheel 15 200529948 257, 26, 27, 271, Intermediate transmission wheel 272' Piston rod stopper 30, Reduction unit driver 31, Pole shaft cylinder Body 16