M263204 八、新型說明： 【新型所屬之技術領域】 本新型是有關於一種散熱裝置，特別是指一種電動工 具之馬達的散熱裝置。 【先前技術】 參閱圖1所示，一傳統電動工具之馬達的散熱裝置， 該電動工具1包含一具有一中心軸線L且供該馬達u容 置的外殼12，及一通風蓋13。該馬達u為一直流馬達， 並包括一延著該中心軸線L固結在該外殼12内的定子iu 、一相對於該定子1U轉動的轉子112，及一相對設置在 該轉子112之-整流子1121外周側的電刷組合體（圖未 示）。該外殼12具有相反的第一開口 121與第二開口 122 。該通風蓋13具有多數通孔131，並可拆卸地封蓋該第二 開口 122 。 該轉子112具有相反的一外置桿部1122與一内置桿 部1123，該外置桿部1122之一末段可穿出該第一開口 一、、且…於工具頭14。該工具頭14可為刻磨工具頭 、研磨工具頭及其他工具頭，使該電動工具工可為刻磨機 、研磨機及其他相對應之用途。 該散熱裝置為一設置在該外殼12内且套設定位在該 外置桿部1122的扇葉片2。 使用時，藉由該馬達U運轉，將使該轉子112轉動 驅使4工具頭14動作，重要的是，該扇葉片2可同時轉 、送出4外设12内之熱氣流，再自該通風蓋丨3送出該 M263204 外殼12内之熱氣流，獲得散熱效果；但是，受到該轉子 112帶動而轉動的單-扇葉>^，於實務上，其散熱效果 極為有限’將使該外殼12内之高溫無法疏散，造成該轉 子112 t Μ子mi的鋼鱗片熱料起，使該電刷組 合體與該整流+ 1121接觸不良，時間-久，容易造成該 電刷組合體損壞’嚴重時’更會使該轉子Μ受損而縮短 垓馬達11之奇命，是以，如何改善該馬達U之散熱問題 業已成為相關業者所努力之目標。 【新型内容】 因此，本新型之目的，是提供一種將雙扇葉片分別設 置在-馬達之轉子的兩相反側上，供包覆該馬達之外殼内 可提高氣流擾動效果，有效帶走外殼内之熱氣流的散熱裝 置。 於疋，本新型之電動工具之馬達的散熱裝置，該電動 工具包含一具有一中心軸線且供該馬達容置的外殼，該馬 達包括-延著該中心軸線gj結在該外殼㈣定子，及一相 對於該定子轉動的轉子，該轉子具有相反的_外置桿部與 一内置桿部，該外置桿部之一末段可組結於一工具頭，該 散熱裝置包含-第一扇葉片與一第二扇葉片。該第一扇葉 片是套設定位在該轉子之外置桿部。該第二扇葉片是可拆 卸地連結在該轉子之内置桿部，藉由該轉子轉動，該第— 扇葉片與第二扇葉片將同步朝相同方向轉動，卩強力順向 氣流與送出該外殼外。 ° 【實施方式】 M263204 有關本新型之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一較佳實施例的詳細說明中，將可清 楚的明白。 參閱圖2、3、4所示，本新型電動工具之馬達的散熱 裝置之一較佳實施例，該電動工具3包含一具有一中心軸 線L1且供該馬達4容置的外殼5，及一可拆卸地鎖接在該 外殼5之一側的通風蓋6。 參閱圖3、4、5所示，該殼體5包括相反且相互連通 的一第一開口 51與一第二開口 52。 A馬達4包括一延著該中心軸線l丨固結在該外殼5内 的疋子41相對於該定子41轉動的轉子42，及一相對 。又置在4轉子42之-整流子42 i外周側的電刷組合體43。 4轉子42具有相反的_外置桿部似與—内置桿部似。 邊外置桿部422之-末段可伸出該第—開口 51連結於一工 /、員"亥工具頭7可為刻磨工具頭、研磨工具頭及其他工 具頭：使该電動工* 3可為刻磨機、研磨機及其他相對應 之用途因《亥工具頭7與該轉子42之組結結構，與該工具 頭7之使用情形皆為習知技術，且非本新型之請i重點ϊ 故在此不再贅述。 之第二開口 52 、該通風蓋6是可拆卸地封蓋該外殼 並具有多數通孔61。 該散熱裝置包含-第-扇葉片8、-第二扇葉片9、一 塾圈組合體⑽及一c字型定位環扣⑽。、片 該第一扇葉片8是設置在該外殼5内，並套設定位名 M263204 該轉子42之外置桿部422。 該第二扇葉片9是設置在該外殼5内，並可拆卸地鍵 結在該轉子42之内置桿部423，該第一扇葉片8與第二扇 葉片9之強力順向氣流方向相同，當該轉子42轉動，該第 一扇葉片8與第二扇葉片9將朝同一方向轉動以使氣流順 向強力送出及獲得扭力增大效果。該第二扇葉片9包括一 扇葉鍵槽91，該轉子42之内置桿部423包括一可與該扇葉 鍵槽91鍵結的桿部鍵槽423ι，該扇葉鍵槽91與該桿部鍵 槽4231藉由一鍵塊12〇達成鍵結。 該塾圈組合體1〇〇是壓抵在該第二扇葉片9之一外表 面92 ’包括依序抵接該外表面92的一波浪型墊圈ι〇1與一 墊圈102。該墊圈i 02具有一自其内環面凸隆形成，且可嵌 接限位在該内置桿部423之桿部鍵槽4231的限位部ι〇2ι。 该定位環扣11 〇是扣接在該轉子42之内置桿部423之 限位溝4232，藉以迫抵該墊圈組合體ι〇〇，使該第二扇 葉片9穩固連結該内置桿部423。 使用時，當該轉子42轉動時，該第一扇葉片8與第 二扇葉片9將同步轉動，以使單一方向之氣流呈順向強力 =出’並經該通風蓋6送出該外殼12内之熱氣流，獲得 散熱效果，其不同於如圖1所示之傳統散熱裝置僅藉由單 一扇葉片2送出該外殼12内之熱氣流，相對本新^利用 雙扇葉片（即第-扇葉片8與第二扇葉片9)誠可提供強力 員向氣抓與增大扭力效果’乃以強力氣流迅速帶走該外殼 5内之熱氣流’所以該外殼5不發熱，不會長時間使用2 M263204 而漏電，使該整好421之銅鱗片不會因 與該電刷組合體43保持良好接觸 _ 兮"…… 艮紆接觸降低損壞情形，終使 该馬達4吻作_(圖未示）、電 壽命較長之優點。 口禾…具有使用 t提的是，藉由該墊圈組合體⑽、該定位環扣 不可使5亥第二扇葉片9更加穩固鍵結於該轉子42 ’且可藉上述墊圈組W蚊位環扣m之拆卸簡 易特性，而使該第二扇葉片9可快速脫離於該轉子Μ，以 便利操作者自外殼5内取出該轉子42，而極具實用價值。 惟以上所述者，僅為本新型之一較佳實施例而已，當 不能以此限定本新型實施之範圍，即大凡依本新型申^ 利範圍及㈣說明書内容所作之簡單的等效變化與修饰， 皆應仍屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一傳統電動工具之馬達的散熱裝置之一未完整 的組合剖視圖； 圖2疋本新型之一較佳實施例的一立體外觀圖，說明 装心有本新型之散熱裝置的電動工具的外觀示意圖； 圖3疋圖2中沿線3-3之一未完整的組合剖視圖，說明 "亥馬達之轉子的前置桿部與内置桿部分別設置一扇葉片； 圖4是該較佳實施例之一未完整的平面分解圖，說明 一第二扇葉片、一墊圈組合體與一定位環扣之關係位置· 及 ， 圖5是圖2中沿線5-5之一未完整的組合剖視圖。 M263204 【主要元件符號說明】 3 電動工具 4 馬達 41 定子 42 轉子 421 整流子 422 外置桿部 423 内置桿部 4231 桿部鍵槽 4232 限位溝 43 電刷組合體 5 外殼 51 第一開口 52 第二開口 6 通風蓋 61 通孔 7 工具頭 8 第一扇葉片 9 第二扇葉片 91 扇葉鍵槽 100 墊圈組合體 101 波浪型墊圈 102 墊圈 1021 限位部 110 定位環扣 120 鍵塊 10M263204 8. Description of new model: [Technical field to which the new model belongs] The new model relates to a heat sink, especially a heat sink of a motor of an electric tool. [Previous Technology] Referring to FIG. 1, a conventional heat dissipation device for a motor of a power tool. The power tool 1 includes a housing 12 having a central axis L and a space for the motor u, and a ventilation cover 13. The motor u is a direct current motor, and includes a stator iu consolidated in the housing 12 along the central axis L, a rotor 112 rotating relative to the stator 1U, and a rectifier disposed opposite the rotor 112. Brush assembly (not shown) on the outer peripheral side of the sub-1121. The casing 12 has opposite first openings 121 and second openings 122. The ventilation cover 13 has a plurality of through holes 131, and the second opening 122 is detachably covered. The rotor 112 has an external rod portion 1122 and a built-in rod portion 1123 opposite to each other. One end portion of the external rod portion 1122 can pass through the first opening 1 and ... to the tool head 14. The tool head 14 can be a engraving tool head, a grinding tool head, and other tool heads, so that the power tool worker can use a engraving machine, a grinder, and other corresponding applications. The heat dissipating device is a fan blade 2 disposed in the casing 12 and sleeved on the external rod portion 1122. When in use, the motor U will rotate the rotor 112 to drive the 4 tool head 14 to move. It is important that the fan blade 2 can rotate at the same time and send out the hot air flow in the 4 peripheral device 12 from the ventilation cover.丨 3 sends out the hot air flow in the M263204 housing 12 to obtain the heat dissipation effect; however, the single-fan blades driven by the rotor 112 to rotate > ^, in practice, its heat dissipation effect is extremely limited 'will make the inside of the housing 12 The high temperature cannot be evacuated, causing the steel scales of the rotor 112 t μm to be heated, causing the brush assembly to have poor contact with the rectifier + 1121, and over time, it is easy to cause the brush assembly to be damaged 'in severe cases'. What's more, the rotor M can be damaged and the strange life of the motor 11 can be shortened. Therefore, how to improve the heat dissipation problem of the motor U has become the goal of the related industry. [New content] Therefore, the object of the present invention is to provide a double fan blade which is disposed on two opposite sides of a rotor of a motor, for covering the inside of the casing of the motor to improve the airflow disturbance effect and effectively take away the inside of the casing. Cooling device for hot air flow. Yu Li, a heat sink for a motor of a new type of electric tool, the electric tool comprising a housing having a central axis and housing the motor, the motor including a knotted stator and a housing extending along the central axis gj, and A rotor rotating relative to the stator, the rotor has an opposite external rod portion and a built-in rod portion. One end of the external rod portion can be combined with a tool head. The heat sink includes a first fan. The blade and a second blade. The first fan blade is sleeved on an outer shaft portion of the rotor. The second fan blade is detachably connected to a built-in rod portion of the rotor, and by the rotation of the rotor, the first fan blade and the second fan blade will synchronously rotate in the same direction, and a strong forward airflow will send out the casing. outer. ° [Embodiment] M263204 The foregoing and other technical contents, features, and effects of the present invention will be clearly understood in the following detailed description of a preferred embodiment with reference to the drawings. Referring to FIGS. 2, 3 and 4, a preferred embodiment of a heat dissipation device for a motor of the novel electric tool. The electric tool 3 includes a housing 5 having a central axis L1 and receiving the motor 4, and The ventilation cover 6 is detachably locked to one side of the casing 5. Referring to Figs. 3, 4, and 5, the casing 5 includes a first opening 51 and a second opening 52 which are opposite and communicate with each other. The A motor 4 includes a rotor 42 rotating with respect to the stator 41 and a rotor 41 which is fixed in the casing 5 along the central axis l1 and is opposed to each other. The brush assembly 43 is disposed on the outer periphery of the commutator 42 i of the fourth rotor 42. The 4-rotor 42 has the opposite _ external rod part looks like-internal rod part. The last section of the outer rod section 422 can extend the first section—the opening 51 is connected to a tool / tool. The tool head 7 can be a grinding tool head, a grinding tool head, and other tool heads: * 3 can be used for engraving machine, grinder, and other corresponding applications. Because of the combined structure of the tool head 7 and the rotor 42, the use of the tool head 7 and the use of the tool head 7 are conventional technologies, and are not the new type. Please focus on it, so I won't repeat it here. The second opening 52 and the ventilation cover 6 detachably cover the casing and have a plurality of through holes 61. The heat dissipating device includes a first fan blade 8, a second fan blade 9, a loop assembly ⑽, and a c-shaped positioning ring buckle ⑽. The first blade 8 is disposed in the casing 5 and sets a position name M263204 and the rotor 42 is an external rod portion 422. The second fan blade 9 is disposed in the casing 5 and is detachably bonded to the built-in rod portion 423 of the rotor 42. The first fan blade 8 and the second fan blade 9 have the same strong forward airflow direction. When the rotor 42 rotates, the first fan blade 8 and the second fan blade 9 will rotate in the same direction, so that the airflow is sent out in a strong direction and a torque increase effect is obtained. The second fan blade 9 includes a fan key slot 91. The built-in rod portion 423 of the rotor 42 includes a rod key slot 423 which can be coupled with the fan key slot 91. The fan key slot 91 and the rod key slot 4231 are borrowed from the fan blade key slot 91. Bonding is achieved by one key block 120. The ring assembly 100 is pressed against an outer surface 92 'of one of the second blades 9 and includes a wave-shaped washer ι01 and a washer 102 which are sequentially abutted against the outer surface 92. The washer i 02 has a protruding portion formed from an inner annular surface thereof, and can be engaged with a limiting portion ι02 2 of a position of the rod key groove 4231 of the built-in rod portion 423. The positioning ring buckle 110 is fastened to the limiting groove 4232 of the built-in rod portion 423 of the rotor 42, so as to force against the washer assembly ι〇, so that the second fan blade 9 is firmly connected to the built-in rod portion 423. In use, when the rotor 42 rotates, the first blade 8 and the second blade 9 will rotate synchronously, so that the airflow in a single direction is forward strong = out 'and sent out of the casing 12 through the ventilation cover 6 The heat flow obtained by the hot air flow is different from the traditional heat dissipation device shown in FIG. 1 which only sends out the heat air flow in the casing 12 through a single fan blade 2. Compared with the new one, the double fan blade (ie the first fan blade) is used. 8 and the second blade 9) It can provide powerful force to grasp the air and increase the torque effect. 'It is a strong airflow to quickly take away the hot air flow in the casing 5.' So the casing 5 does not generate heat and will not use for a long time. 2 M263204 The electric leakage prevents the 421 copper scales from being in good contact with the brush assembly 43. The contact will reduce the damage and eventually cause the motor 4 to kiss _ (not shown) 2, the advantages of longer electrical life. I want to mention that with the washer assembly ⑽, the positioning ring buckle can not make the second blade 9 of the Hai Hai more firmly bonded to the rotor 42 ′, and can be borrowed by the above washer group W mosquito bit ring The simple disassembly feature of the buckle m enables the second fan blade 9 to be quickly disengaged from the rotor M, so as to facilitate the operator to take out the rotor 42 from the casing 5, which is of great practical value. However, the above is only one of the preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited by this, that is, the simple equivalent changes made according to the scope of the present application and the contents of the description, Modifications should still fall within the scope of this new patent. [Brief description of the drawings] FIG. 1 is an incomplete combined sectional view of one of the heat dissipation devices of a conventional electric tool motor; FIG. 2 is a three-dimensional appearance view of a preferred embodiment of the present invention, illustrating that the present invention has Schematic diagram of the external appearance of the power tool of the heat sink; Fig. 3-Fig. 2 is an incomplete combined sectional view along line 3-3, illustrating that "the front rod portion and the built-in rod portion of the rotor of the Hai motor are provided with a blade, respectively; 4 is an incomplete plan exploded view of one of the preferred embodiments, illustrating the relationship between a second blade, a washer assembly, and a positioning ring; and, FIG. 5 is one of the lines 5-5 in FIG. 2 Incomplete combined sectional view. M263204 [Description of main component symbols] 3 Power tool 4 Motor 41 Stator 42 Rotor 421 Commutator 422 External lever 423 Built-in lever 4321 Rod keyway 4232 Limit groove 43 Brush assembly 5 Housing 51 First opening 52 Second Opening 6 Ventilation cover 61 Through hole 7 Tool head 8 First blade 9 Second blade 91 Fan key slot 100 Washer assembly 101 Wavy washer 102 Washer 1021 Stopper 110 Locating ring 120 Key block 10