201012599 九、發明說明： 【發明所屬之技術領域】 本發明係與電動工具有關，特別是指一種電動工具之 離合裝置 5【先前技術】 按，一般的電動工具在啟動後，馬達會帶動輪出輪旋 轉，進而帶動連接在輸出軸上的工具件，例如：起子頭， ❹ 旋轉。當進行鎖螺絲作業時，持續旋轉的起子頭將很難與 螺絲結合，而且很容易損壞螺絲。因此，每當鎖一個螺絲 10時，須先停止電動工具，待起子頭與螺絲結合後，再啟動。 然，這在連續鎖螺絲的作業中是相當不方便的操作，為解 決前述的問題，美國第5，138,916號專利提供了一種電動工 具其中設置有一離合裝置。該電動工具中設置有一第—離 合器以及一第一離合器，其中該第一離合器的週緣設置有 I5齒部，以與馬達輸出軸的齒輪嚙合，而其前側則設有離合 〇 齒。該第二離合器的後側同樣設置有一離合齒。一彈菁， 設置於該第一離合器與該第二離合器之間，在正常狀態 下’該第-離合器的離合齒與該第二離合器的離合齒是分 離的。該第二離合器連接於一輸出軸，其上可連接工具件， -2〇例如起子頭。當該電動工具啟動後，馬達會帶動該第一離 合器旋轉’但是該第二離合器、輸出轴與起子頭是不旋轉 的。當-外部壓力施加於起子頭後，會造成該起子頭 出軸與第二離合器後退，進而使得該第一離合器的離合齒 與該第二離合器的離合齒嗜合，此時馬達的動力即會透過 4 201012599 該第-離合器、第二離合器與輸出軸 旋轉。當該外部壓力消失後，該彈菁即會二:；，$其 ϋ ’以切斷馬達與起子頭之間的傳動關係。〃第-離合 我們發現前述發明所提供的離合 5 耗與強度的問題，該第:離 ί器需以㈣度材質所製成，而且二者須以相同的材料製 _ 為配口 °亥第離合器’馬達的輸出軸也須以與第一離 二盗相同的材料製作。如此會大幅提供製造的成本。另外， i〇 u彈簧的設置方式也會增加組裝的困難度。 【發明内容】 本發明之主要目的在於提供—種電動卫具之離合裝 置，其材料的選擇上會有較大的彈性。 15署^發明之_人一目的在於提供一種電動工具之離合裝 鲁、具有較低的製糾本雜料的組裝方法。 ^以達成上揭之發明目的，本發明之電動工具之離合 ^告认要包括馬達，具有—輸出轴，見該輸出軸上具有 ”，離合裝置，具有―與該馬達之齒輪唾合之輸入 20接於：傳動轴，連接於該輸入齒輪；〆第一離合器，連 具右Ιΐί動轴’其一側具有離合齒；以及一第二離合器， 齒，與該第一離合器之離合齒對應；-輸出軸， 該輸出=::Γ孔内端則連接該第二離合器;其中 的孔争。”有一孔，以及一彈簧，設置於該輸出軸 201012599 【實施方式】 為了詳細說明本發明之構造及特點所在， 較佳實施例並配合圖式說明如后： 下之 5 15 ❹ 20 請參閱第一圖所示，本發明一較佳實施例所提供 L包括有:一殼體10 ’其中裳設有-馬達2〇、-離 口裝置30以及一輸出軸4〇。該殼體1〇上設置 開關用來連接或切斷該馬達2G的電源。該馬達2〇 4〇的外透^離合装置3〇傳輸至該輸出軸40。該輸出軸 行相^業可連接一工具件5〇(圖中顯示為一起子頭），以進 Μ，參閱第二圖所示，該離合裝置3G包含有—輸入齒輪 C2、一第一離合器33、一第二離合器34、-又釋軸35以及一彈簧36。 該傳動軸32的-端樞設於該殼體1G，使其可沿其轴向 轉動。該輸入齒輪31固設於該傳動軸32上，以與該 姓，2〇之輸出軸21上的齒輪211喷合。該傳動轴32的前 崎具有一多角形孔32卜 °亥第一離合器33的後側具有一多角形柱部331，可插 =傳動軸32的多角形孔321中，令該第—離合器33與 ，傳動軸32結合在一起。該第一離合器33的後側具有一 礅形的離合齒332,而該離合齒332的中央具有一穿孔333。 該第二離合器34,與第一離合器33成對稱的型態，其 设側具有一環形離合齒342’該離合齒342的中央具有一穿 孔343 ’而其前側具有一多角形柱部341。該第二、離、合器％ 6 201012599 更具有一環形肩面344，環燒於該多角形柱部341的内端。 該支撐軸35的一端插入該第一離合器33的穿孔333 中’另-端則穿過該第二離合器34的穿孔如， 5 15 該第二離合ϋ 34的穿孔343的該端上設置有—板子如。 該輸出軸40的外端伸出該殼體1〇，具有一 4卜可供插接-工具件5G(第三圖顯示為—起子頭）。 的内端具有—多角形孔42，供該第二離合器的 夕^二柱341部插人而結合在—起，且該輸出轴4。的 2在該第二離合器34的肩面344上。該彈簧％則是設 置在该輸出軸40的多角形孔42中，一 oci L 端抵靠在該支撐軸 ，另一端則抵靠在該輸出軸40的多角形孔 42的内端。 月办札 在正常狀態下，請參㈣二圖與第三圖所示 36會將該輸出軸4〇與該支撐軸35的板子351向=簧 第二離合器34的離合齒342與該第—離合器幻的 合齒说是分離的。此時，馬達20雖然經由該輸= 以及該傳動軸32而帶動該第一離合宍q 酉輸31 出軸40仍是不旋轉的。 3㈣’但是該輸 請參閱第四圖與第五圖所示，當卫具件5 力後，即會推動該輸出軸40與該第二離人„ j疋壓 使該第二離合器34的離合齒342邀 〇态4後退，致 /、必弟一離么哭,,丄， 合齒332响合，此時，馬達2〇的動力即 ° ’ 40，而驅動該工具件50旋轉以進行預〜 運至该輪出軸 失後’該彈簧36即會向外推抵該傳動：業使力消 Ί文舔弟二離合 20 201012599 器34的離合齒342與該第一離合器33的離合齒332分離， 以切斷動力。 根據本發明的結構，離合裝置30與馬達20的連接(輸 入齒輪31與馬達輸出軸21的齒輪211)與離合器的連接（第 5 —離合器33的離合齒332與該第二離合器34的離合齒342) 之間是獨立不相關的。因此，雖然該第一離合器33與該第 二離合器34還是需要以高強度材料製造，該輸入齒輪31 與馬達輸出軸21的齒輪211則可以低強度的材料(例如：塑 膠)製造，如此可降低製造成本。另外，該彈簧36是裝設在 1〇 該輸出軸40的孔42中，可達到較為簡便的組裝程序。 201012599 【圖式簡單說明】 第一圖係本發明一較佳實施例之剖視圖； 第二圖為本發明一較佳實施例之部分剖視圖，顯示第 一離合器與第二離合器是分離的； 5 第三圖為本發明一較佳實施例之部分元件立體圖，顯 示第一離合器與第二離合器是分離的； 第四圖為本發明一較佳實施例之部分剖視圖，顯示第 • 一離合器與第二離合器是嚙合的；以及 第五圖為本發明一較佳實施例之部分元件立體圖，顯 10示第一離合器與第二離合器是嚙合的。 201012599 【主要元件符號說明】 電動工具1 殼體10 扳機11 馬達20 輸出轴21 5 齒輪211 離合裝置30 輸入齒輪31 傳動軸32 Φ 多角形孔321 第一離合器33 多角形柱部331 離合齒332 穿孔333 第二離合器34 10 多角形柱部341 離合齒342 穿孔343 環形肩面344 • 支撐軸35 板子351 彈簧36 輸出軸40 多角形孔41 多角形孔42 15 工具件50 參201012599 IX. Description of the invention: [Technical field of the invention] The present invention relates to a power tool, in particular to a clutch device for a power tool 5 [Prior Art] Press, after the general power tool is started, the motor will drive out The wheel rotates, which in turn drives the tool attached to the output shaft, for example: the screwdriver head, ❹ rotates. When the lock screw is operated, the continuously rotating screwdriver head will be difficult to bond with the screw and the screw will be easily damaged. Therefore, whenever a screw 10 is locked, the power tool must be stopped first, and then the starter and the screw are combined before starting. Of course, this is a relatively inconvenient operation in the operation of the continuous locking screw. In order to solve the aforementioned problems, U.S. Patent No. 5,138,916 provides an electric power tool in which a clutch device is provided. The power tool is provided with a first clutch and a first clutch, wherein the periphery of the first clutch is provided with I5 teeth for meshing with the gear of the motor output shaft, and the front side is provided with clutch teeth. The rear side of the second clutch is also provided with a clutch tooth. An elastic phase is disposed between the first clutch and the second clutch. In a normal state, the clutch teeth of the first clutch and the clutch teeth of the second clutch are separated. The second clutch is coupled to an output shaft to which a tool member can be attached, such as a driver bit. When the power tool is activated, the motor will drive the first clutch to rotate 'but the second clutch, the output shaft and the driver bit are not rotating. When the external pressure is applied to the driver's head, the driver's head output shaft and the second clutch are retracted, so that the clutch teeth of the first clutch are in harmony with the clutch teeth of the second clutch, and the power of the motor is Through 4 201012599, the first clutch, the second clutch and the output shaft rotate. When the external pressure disappears, the bullet will be two:;, $ ϋ ' to cut off the transmission relationship between the motor and the driver's head. 〃 --clutch We found the problem of the clutch 5 consumption and strength provided by the aforementioned invention, the first: the Ø device must be made of (four) degrees of material, and the two must be made of the same material _ for the mouth The output shaft of the clutch 'motor must also be made of the same material as the first two. This will greatly increase the cost of manufacturing. In addition, the arrangement of the i〇 u springs also increases the difficulty of assembly. SUMMARY OF THE INVENTION The main object of the present invention is to provide a clutch device for an electric harness having greater flexibility in material selection. The purpose of the invention is to provide a clutching method for a power tool, which has a low assembly method and a miscellaneous material. In order to achieve the object of the invention, the clutch of the power tool of the present invention comprises a motor having an output shaft, seeing that the output shaft has a "clutch device" having an input that is slid with the gear of the motor. 20 is connected to: a drive shaft connected to the input gear; a first clutch having a right-hand drive shaft having a clutch tooth on one side thereof; and a second clutch, a tooth corresponding to the clutch tooth of the first clutch; - an output shaft, the output =:: the inner end of the bore is connected to the second clutch; wherein the hole is contiguous." A hole, and a spring are disposed on the output shaft 201012599. [Embodiment] In order to explain the structure of the present invention in detail And the features, the preferred embodiment and the following description of the following: 5 15 ❹ 20 See the first figure, a preferred embodiment of the present invention provides L: a housing 10 ' There are a motor 2 〇, an off-port device 30 and an output shaft 4 。. A switch is provided on the housing 1 to connect or disconnect the power of the motor 2G. The external transmission device 3〇 of the motor 2〇 is transmitted to the output shaft 40. The output shaft can be connected to a tool member 5〇 (shown as a sub-head in the figure) to enter the Μ. Referring to the second figure, the clutch device 3G includes an input gear C2 and a first clutch. 33. A second clutch 34, a revolving shaft 35 and a spring 36. The end of the drive shaft 32 is pivotally mounted to the housing 1G so as to be rotatable in its axial direction. The input gear 31 is fixed to the transmission shaft 32 to be sprayed with the gear 211 on the output shaft 21 of the last name. The front side of the transmission shaft 32 has a polygonal hole 32. The rear side of the first clutch 33 has a polygonal column portion 331 which can be inserted into the polygonal hole 321 of the transmission shaft 32 to make the first clutch 33 and The drive shafts 32 are combined. The rear side of the first clutch 33 has a serpentine clutch tooth 332, and the center of the clutch tooth 332 has a through hole 333. The second clutch 34 is of a symmetrical type with the first clutch 33, and has a ring-shaped clutch tooth 342' on the side thereof. The clutch tooth 342 has a through hole 343' in the center and a polygonal column portion 341 on the front side. The second, disengaged device % 6 201012599 further has an annular shoulder surface 344 which is fired at the inner end of the polygonal column portion 341. One end of the support shaft 35 is inserted into the through hole 333 of the first clutch 33. The other end passes through the through hole of the second clutch 34. For example, 5 15 is provided on the end of the through hole 343 of the second clutch 34. Board like. The outer end of the output shaft 40 extends out of the housing 1 and has a plug-in tool member 5G (the third figure is shown as a starter head). The inner end has a polygonal hole 42 for the second clutch 341 of the second clutch to be inserted and coupled to the output shaft 4. 2 is on the shoulder surface 344 of the second clutch 34. The spring % is disposed in the polygonal hole 42 of the output shaft 40, with an oci L end abutting the support shaft and the other end abutting against the inner end of the polygonal hole 42 of the output shaft 40. In the normal state, please refer to (4) 2 and the third diagram 36. The output shaft 4〇 and the plate 351 of the support shaft 35 are turned to the clutch teeth 342 of the second clutch 34 and the first The clutch's phantom teeth are said to be separate. At this time, although the motor 20 drives the first clutch 经由q through the output shaft and the transmission shaft 32, the shaft 40 is still not rotated. 3 (4) 'But the loss is shown in the fourth and fifth figures. When the guard member 5 is forced, the output shaft 40 and the second person are pushed to make the second clutch 34 clutch. The tooth 342 invites the state 4 to retreat, causing /, and the younger brother is crying, and 丄, the tooth 332 is ringing. At this time, the power of the motor 2〇 is ° '40, and the tool member 50 is driven to rotate for pre-preparation. ~ When the wheel is lost to the wheel, the spring 36 will push outwards to the transmission: the force is dissipated and the second clutch 20 201012599 The clutch teeth 342 of the device 34 and the clutch teeth 332 of the first clutch 33 Separating to cut off the power. According to the structure of the present invention, the connection between the clutch device 30 and the motor 20 (the input gear 31 and the gear 211 of the motor output shaft 21) is connected to the clutch (the fifth clutch clutch 332 of the clutch 33 and the The clutch teeth 342) of the second clutch 34 are independently independent. Therefore, although the first clutch 33 and the second clutch 34 still need to be made of a high-strength material, the input gear 31 and the gear of the motor output shaft 21 211 can be made of low-strength materials (eg plastic), which can reduce the system In addition, the spring 36 is mounted in the hole 42 of the output shaft 40, which can achieve a relatively simple assembly procedure. 201012599 [Simplified Schematic] The first figure is a preferred embodiment of the present invention. 2 is a partial cross-sectional view showing a first clutch and a second clutch in a preferred embodiment of the present invention; 5 is a perspective view of a part of the components of the preferred embodiment of the present invention, showing the first clutch 4 is a cross-sectional view of a preferred embodiment of the present invention showing the first clutch and the second clutch engaged; and the fifth figure is a portion of a preferred embodiment of the present invention A perspective view of the component shows that the first clutch is engaged with the second clutch. 201012599 [Description of main components] Power tool 1 Housing 10 Trigger 11 Motor 20 Output shaft 21 5 Gear 211 Clutch device 30 Input gear 31 Drive shaft 32 Φ Polygonal hole 321 First clutch 33 Polygonal column portion 331 Clutching teeth 332 Perforation 333 Second clutch 34 10 Polygonal column portion 341 Clutching teeth 342 Perforation 343 Cylindrical shoulder surface 344 • Support shaft 35 Plate 351 Spring 36 Output shaft 40 Polygonal hole 41 Polygonal hole 42 15 Tool 50 Reference