200821108 九、發明說明： 【發明所屬之技術領域】 本發明係涉及一種氣動手工具的構造，尤指一種傳動 確實故障率低的氣動工具彎角傳動頭傳動裂置。 【先前技術】 其係設有 〇 1 )以 0 2)， ，並於長 2 )朝頭 既有的彎角傳動頭氣動工具如第六圖所示 一外殼（6 0 )、外殼（6 0 )設有一頭殼（ 及一由頭殼（6 0 1 ) —側向外延伸的長桿（ 於長桿（6 0 2 )後端結合一開關構造（6 1 桿（6 0 2 )内設有一汽缸（6 2 )，汽紅（ 殼（6 〇 1 )内伸設一傳動主軸（6 ? 、 0 J 1 )，於傳動主軸 (62 1)前端設有一傘形齒輪# 、〇 Z 2 )，於頭殼（6 〇 1 )内樞設一心軸（6 3 )，於心軸（6 3 )套< 軸傘形齒輪（64)並與傘形齒輪又 “ 乙z J 口齒合，心軸 (6 3 )前端穿出頭殼（6 0 1 )外並結合一 」運結刀呈 的傳動頭（6 5 ) 。 /、 上述的彎角傳動頭氣動工具係以汽缸 v J ) 的傳動 主軸（6 2 1 )藉由心軸傘形齒輪（6 4、丨、/ n人 ,〇 4)以及傘形齒於 (6 2 2 )的嚙合並帶動傳動頭（6 5 )旋轉，然 ^ 於汽缸（6 2 )驅動傳動頭（6 5 )係、間接傳動：：式由 其間連結的構造車父多’因此造成結構較為複 、 π曰^ '’並且組萝 不易而成本高，並且心軸傘形齒輪（6 4t^ ..0 )以及傘形齒於 (6 2 2 )之間係以嚙合方式驅動，長時π、富仏 u % 易損壞。 ^輪各 4 200821108 【發明内容] 由於既有彎角傳動頭氧 角乳動工具會有結構複雜成本高以 及間接傳動齒輪易受指的 、勺缺點。有鐘於此，本發明主要目 的在於，以直接傳t 辱動的構造設計，達到降低故障率並且組 瓜谷易的功效。 為達到上述目66，士 μ 本發明提供一種氣動工具彎角傳動 頭傳動裝置，該裝詈孫4 、 ^ 係匕括一外殼、分別結合於該外殼的200821108 IX. Description of the Invention: [Technical Field] The present invention relates to a construction of a pneumatic hand tool, and more particularly to a transmission of a pneumatic tool angular transmission head with a low failure rate. [Prior Art] It is provided with 〇1) with 0 2), and with a length of 2) facing the existing corner of the head. The pneumatic tool is shown in Figure 6 as a casing (60) and casing (6 0 ) is provided with a shell (and a long rod extending from the head shell (6 0 1 ) to the side) (the long rod (6 0 2 ) rear end is combined with a switch structure (6 1 rod (6 0 2 )) There is a cylinder (6 2 ), steam red (the casing (6 1 ) has a transmission main shaft (6 ? , 0 J 1 ), and a bevel gear # 〇, 〇 Z 2 is provided at the front end of the transmission main shaft (62 1)) , a mandrel (6 3 ) is pivoted in the head shell (6 〇 1 ), and the mandrel (6 3 ) sleeve < the shaft bevel gear (64) is coupled with the bevel gear and the teeth of the bevel gear. The front end of the shaft (6 3 ) passes outside the head casing (6 0 1 ) and is combined with a transmission head (6 5 ) which is conveyed by a knife. /, The above-mentioned angled transmission head pneumatic tool is driven by a cylinder v J ) The main shaft (6 2 1 ) is rotated by the mandrel bevel gear (6 4, 丨, / n person, 〇 4) and the umbrella tooth (6 2 2 ) and drives the transmission head (6 5 ) to rotate, then ^ Driving the drive head (6 5 ) to the cylinder (6 2 ), indirect transmission: The structure of the connected car is more than 'thereby making the structure more complex, π曰^ '' and the group is not easy and costly, and the mandrel bevel gear (6 4t^ ..0 ) and the umbrella tooth (6 2 2 ) The driving is driven by the meshing mode, and the long-term π, rich 仏u % is easy to be damaged. ^ Wheels 4 200821108 [Summary of the Invention] Because of the existing angled head oxygen angle eccentric tool, there will be complicated structure and high cost and indirect transmission gear The main purpose of the present invention is to reduce the failure rate and the effect of the group of Gu Guyi. Providing a pneumatic tool angular transmission head transmission device, the assembly 4, a system comprising a casing respectively coupled to the outer casing
氣動馬達以及-關關姓·、iL 開關構造，以及一結合於氣動馬達 動頭，其中： 口亥外叙δ又有一頭殼以及一由該頭殼一侧向外延伸的長 杯4頭双内形成一組裝槽，該組裝槽係圓筒形並且於前 端形成-前開。,該長桿内形成一氣室並且於末端形成一 後開U H氣室與該組裝槽的周圍之間穿設—進氣孔以 及一個以上的排氣孔； ”亥氣動馬達係固設於該組裝槽並於周圍設有一入氣口 '及CUX上的出氣口 ’該氣動馬達的人氣口係與進氣孔 才、。二且σ出氧口係與各排氣孔相通，該氣動馬達於軸 心位樞，又一心軸，該心軸的前端係由前開口伸出該頭殼； 5亥開關構造係結合於該長桿末端，該開關構造設有一 朝該進氣孔延伸的進氣管，以該進氣管與該進氣孔連接， 開關構&並穿设複數個力氣孔，n氣孔前端透過該氣室 與各排氣孔相通； 该傳動碩係結合於該心軸的前端並形成一連結構造。 進一步’本發明的頭殼設有一筒形的裝設部以及一由 5 200821108 该I設部周侧向外延彳φ的 山 申勺k伸^，組裝槽係形成於該裝設 部’於該延伸部於々卜# & & 丨於外為面内凹形成-固定螺孔，所述進氣 孔以及各排氣孔係穿設於該固定螺孔内端與組裝槽周壁之 間；所述長桿係直管體並且於内部形成氣室’長桿於前端 配合该固定螺孔形成一螺纹部 系、，、文4，以螺紋部螺合於該固定螺 孔° 更進一步，本發明於前開口周緣的組裝槽壁面形成一 固定螺牙’於組裝槽後端的中央内凹形成一軸承座容槽； 氣動馬達設有一汽缸，汽缸係嵌設於組裝槽，入氣孔以及 各出氣孔係形成於該汽紅周圍，於汽虹的後側罩合一後轴 承座，後軸承座係容設於軸承座容槽並於内部組裝一後轴 承二於汽缸的前側設有一前軸承座，前軸承座於内部嵌設 -前軸承，於汽缸内設有一轉子，該轉子周圍插設複數個 葉片，所述心軸係穿設於轉子的軸心位並框穿該前轴承與 該後軸承，設有-定位環，該定位環係螺鎖於該固定螺牙 並抵罪於别轴承座’將前轴承座定位。 、當本發明實施使用時，係以開關構造後端連接一風管 並且於傳動頭的連結構造結合一刀具。當使用日寺，係轉動 開關構造，將風管的氣體經由進氣管導引至進氣孔再透過 入氣孔進入氣動馬達内驅動作用’使心軸驅動傳動頭帶動 刀具旋轉。氣動馬達内驅動心軸旋轉的氣流經過後，會由 各出氣孔通過排氣孔並經由氣室由開闕構造的各個茂2孔 向外排出’猎此達到氣流循ί辰並驅動氣動馬達以使刀且（5 1 )轉動加工的功效。 6 200821108 由於本發明的氣動馬達係裝設於 動頭帶動刀具’因此能夠以直接的傳動構造二:: 的損耗亚降低故障率，且由於直接驅動的構 二 因此能夠達到組裝容易並降低成本的功效。 間’ 【實施方式】Pneumatic motor and - Guan Xing, iL switch structure, and a combination of pneumatic motor moving head, wherein: 亥 外 δ has a shell and a long cup of 4 heads extending from one side of the head shell An assembly groove is formed therein, and the assembly groove is cylindrical and formed at the front end - front opening. a gas chamber is formed in the long rod, and a rear opening UH gas chamber is formed at the end and an air inlet hole and one or more exhaust holes are formed between the circumference of the assembly tank; "The air motor is fixed in the assembly." The slot is provided with an air inlet port and an air outlet port on the CUX. The air port of the air motor is connected to the air inlet hole. The σ oxygen outlet port communicates with each air vent hole, and the air motor is at the shaft center. a pivoting shaft, a further mandrel, the front end of the mandrel extending from the front opening to the head casing; a 5H switch structure coupled to the end of the long rod, the switch structure being provided with an intake pipe extending toward the air inlet hole, The intake pipe is connected to the air inlet hole, the switch mechanism & and a plurality of force air holes are disposed, and the front end of the n air hole communicates with each of the air exhaust holes through the air chamber; the transmission master is coupled to the front end of the mandrel and Forming a joint structure. Further, the head shell of the present invention is provided with a cylindrical mounting portion and a mountain cover extending from the periphery of the I set portion to the outer side of the 设φ, and the assembly groove is formed in the package. The part 'in the extension is formed in the outer surface of the 々布# && a screw hole, the air inlet hole and each air vent hole are disposed between the inner end of the fixing screw hole and the peripheral wall of the assembly groove; the long rod is a straight tube body and forms a gas chamber inside the long rod at the front end A threaded portion is formed in cooperation with the fixing screw hole, and the threaded portion is screwed to the fixing screw hole. Further, the present invention forms a fixing screw on the assembly groove wall surface of the front opening periphery. The central recess of the end forms a bearing seat groove; the air motor is provided with a cylinder, the cylinder system is embedded in the assembly groove, the air inlet hole and the air outlet holes are formed around the steam red, and the rear side cover of the steam rainbow is combined with a rear bearing The rear bearing seat is accommodated in the bearing housing groove and is internally assembled. The rear bearing 2 is provided with a front bearing seat on the front side of the cylinder, the front bearing seat is internally embedded with a front bearing, and a rotor is arranged in the cylinder. Inserting a plurality of blades around the rotor, the mandrel is disposed at an axial center of the rotor and is framed by the front bearing and the rear bearing, and is provided with a positioning ring, and the positioning ring is screwed to the fixing screw Convicted of the other bearing housing 'positioning the front bearing housing When the invention is used in practice, a wind pipe is connected at the rear end of the switch structure and a tool is coupled to the joint structure of the drive head. When using the Japanese temple, the rotary switch structure is used to guide the gas of the air duct through the air intake pipe. Leading to the air inlet hole and then entering the air hole to enter the driving action of the air motor. The spindle drive driving head drives the tool to rotate. After the airflow of the driving mandrel in the air motor passes, the air outlet passes through the air outlet and passes through the air. The chamber is discharged outward from each of the 2 holes of the open structure, and the effect of the air motor is driven to drive the air motor to rotate the knife and (5 1 ). 6 200821108 Since the air motor of the present invention is installed in The moving head drives the tool's. Therefore, it is possible to reduce the failure rate in a direct transmission configuration of the second::, and because of the direct drive configuration, it is easy to assemble and reduce the cost. Between'
本發明係一種氣動工具彎角傳動頭傳動裝置，請表看 第一至四圖的較佳實施例，其係包括一外殼（丄〇 ^ γ八 別結合於外殼（i 〇 )的一氣動馬達（2 〇 )以及—開$ 構造（3 0 )，以及一結合於氣動馬達（2 〇 )的傳動頭 (4 0 )，其中： ' 外殼（1 0 )設有一頭殼（1 1 )以及一結合於頭殼 (1 1 )的長桿（1 2 )，其中，頭殼（1 1 )設有一圓 筒形的裝設部（1 1 1 )以及一由裝設部（1 1 1 )周側 向外延伸的延伸部（1 1 2 )，裝設部（1 1 1 )内部形 成一組裝槽（1 1 1 1 )，組裝槽（1 1 1 1 )係圓筒形 並且於前端形成一前開口（1 1 1 2)，於前開口（工工 1 2 )周緣的壁面形成一圓環狀的固定螺牙（1 1 1 3 )， 於組裝槽（1 1 1 1 )後端的中央内凹形成一圓形的轴承 座容槽（1 1 1 4 )，於組裝槽（1 1 1 1 )周側壁面的 前、後兩側並分別凹設形成一圓環狀的排氣凹溝（1 1丄 延伸部（1 1 2 )係圓桿體並於外端面内凹形成一固 定螺孔（1 1 2 1 )，於固定螺孔（1 1 2 1 )内端與兩 排氣凹溝（1 1 1 5 )中間的組裝槽（1 1 1 1 )壁面之 7 200821108 間穿设一進氣孔（1 1 2 2 )，於延伸部（1 1 2 )位於 進氣孔（1 1 2 2 )的兩侧分別穿設一對排氣孔（2丄2 3 )，各排氣孔（i丄2 3 ) —端與各排氣凹溝（丄工工 5 )相通，另一端與固定螺孔（丄丄2丄）相通； 長桿（1 2 )係直管體並且於内部形成一氣室（1 2 1 )，長桿（1 2 )於前端的外周面並配合固定螺孔（1 1 2 1 )形成一螺紋部（1 2 2 )，以螺紋部（1 2 2 ) 螺合於固定螺孔（1 1 2 1 )，並且進氣孔（1 1 2 2 ) 以及排氣孔（1 1 2 3 )與氣室（i 2 i )相通，於氣室 (1 2 1 )後端形成一後開口（ 2 2 3 )，於後開口（工 2 3 )周圍的壁面形成一環狀的螺鎖螺牙（丄2 4 )。 亂動馬達（2 0 )設有一汽紅（2 i )，汽红（2工） 係管體並嵌設於組裝槽（1111)，汽缸（21)係於 周圍係t a氣孔（2 1 1 )以及分別以環狀排列並位 於入氣孔（2 1 1 )前側以及後側的數個出氣孔（2丄2 )， 入氣孔（2 1 1 )係與進氣孔（1 1 2 2 )相通，各出氣 孔（2 1 2 )係配合各排m、、箠f、 r、 口排乳凹溝（；L丄i 5 )而與各排氣 孔（1 1 2 3 )相通，於汽缸（2 1 )的後側罩合設有一 後軸承座（2 2)，後車由承座（22)係容設於轴承座容 槽（1 1 1 4 )並於内部組裝-後軸承（2 2 1 )，於汽 缸（2 13的前側設有—前軸承座（2 3)，前軸承座（2 3)係以周圍抵靠纪袭槽（1 1 1 1 )前側的壁面而固定， 並於内部嵌設一前軸承（2 3丄）· 方。飞缸（2 1 )内設有一轉子（2 4 )，轉子（2 4 ) 8 200821108 周圍插設複數個荦# f 9 g 1 / 茶月（2 5 ) ’於轉子（2 4 )轴心位空 設一心軸（2 6 )，心 4rL f O P、 6 )後端係樞穿於後轴承 2 1)，前端係枢穿前軸承（2 q Ί 1廿ώ义山 M T T 9 ? Η 2 3 1 )亚由則端的前開口 於心軸（2 6 )的前端並形成連結螺 汶（2 6 1 )，設有—定位環（2 7 )，定位環（ 係環體並於周圍形成定位螺紋（2 7丄），以 71)螺鎖於岐料錢料料承座（22 3 )的丽側端緣將前軸承座（2 3 )組裝定位。 開關構造（3 0 )係設有—旋轉間（3 χ ) 轉間：31)螺鎖結合於長桿（⑴後開口（123 ::螺:請牙（1 “）’於旋轉㈤（3 1 )前端對應進氣 (丄1 2 2 )朝前伸設一進氣管（3 2 )，以汽 1) 前端緣抵靠料氣π (1122)後端周緣並連接， 於％轉閥（31)後端設有一風管接頭（33)，風管接 員（3 3 )藉由旋轉閥（3工）控制啟閉而與進氣管（3 2) 相通，於旋轉闊（31)周圍沿轴向穿設複數個茂氣 孔（3 1 1 ) ’各錢孔（3 i丄）前端係與氣室q 2 1 )相通並且後端穿出旋轉間（3 χ )後端的周壁。 傳動頭（4 0)係圓盤體並於後側的軸心位設有—傳 動螺2 ( 4 1 )’以傳動螺孔（4 1 )螺鎖結合於心軸（2 ㈠前端的連結螺紋（261)，於傳動帛（4〇)前侧 的軸心位朝前垂直伸設一作為連結構造的螺桿（4 2 )。 當本發明實施使用時，請參看第四、五圖的較佳實施 例，係以風管接頭（3 3)連接一風管（5 〇)並且於傳 9 200821108 動頭（4 0 )的螺桿（4 2 )螺鎖結合_刀呈(5丄）。 當使用時，係轉動開關構造（30)的旋轉閥（31)’ 的氣體經由進氣* (32)導引至進氣孔 22) ’再由進氣孔（1122)透過入氣孔（2 ⑴進入氣動馬川⑹内驅動心軸㈡㈡旋轉， 使其驅動傳動頭（40)帶動刀具（51)加工作用；氣 動馬達（20)内驅動心轴（26)後的氣流會由各出氣 1 2)經由排氣凹溝（1 1 1 5 )的導引，再通過 排氣孔（11 23)並經由氣室（12 "由開關構造（3 〇)的各個茂氣孔（311)向外排出，藉此達到氣流循 壤亚驅動氣動馬達（20)α使刀具（51)轉動加工的 功效。 由於本發明的氣動馬達（2 ◦)係裝設於頭殼（1 1 ) 内並直接結合傳動頭（4 〇 )帶動刀具（5丄），因此驅 動知作直接，能夠減少機械效率的損耗並降低故障率，並 由於直接驅動的構造精簡，因此能夠達到組裝容易的降低 成本功效。 上述所揭露的本發明之技術手段，係僅用以說明本發 明之較佳貫施狀態，但不代表本發明之實施態樣限於上述 所揭露的較佳實施例’對熟悉此項技術的人士，依據本發 明所作外型、大小或數量上的簡易改變而實質上卻與本發 明所揭露的技術手段相同的裝置，亦不應被排除於本發明 所欲請求保護的申請專利範圍之外。 【圖式簡單說明】 200821108 第一圖係本發明較佳實施例之立體圖。 第二圖係本發明較佳實施例頭部之剖面圖。 第三圖係本發明較佳實施例頭部之分解圖。 第四圖係本發明較佳實施例之側視圖。 第五圖係本發明較佳實施例頭部氣流方向之示意圖 第六圖係既有氣動工具之部分剖面示意圖。 【主要元件符號說明】 (1 0 )外殼 (1 1 )頭殼 (111)裝設部 (1 1 1 1 )組裝槽 (1112)前開口 (1 1 1 3 )固定螺牙 (1 1 1 4 )轴承座容槽 （1 1 1 5 )排氣凹溝 (112)延伸部 (1 1 2 1 )固定螺孔 (1 1 2 2 )進氣孔 (1 1 2 3 )排氣孔 (12)長桿 (1 2 1 )氣室 (1 2 2 )螺紋部 (1 2 3 )後開口 (1 2 4 )螺鎖螺牙 (2 0 )氣動馬達 (21)汽缸 (2 1 1 )入氣孔 (212)出氣孔 (2 2 )後軸承座 (2 2 1 )後軸承 (2 3 )前軸承座 (2 3 1 )前軸承 (2 4 )轉子 (2 5 )葉片 (2 6 )心軸 (2 6 1 )連結螺紋 (2 7 )定位環 (2 7 1 )定位螺紋 (3 0 )開關構造 (3 1 )旋轉閥 (3 1 1 )洩氣孔 200821108 (3 2 )進氣管 (3 3 )風管接頭 (4 0 )傳動頭 (4 1 )傳動螺孔 (4 2 )螺桿 (5 0 )風管 (5 1 )刀具 (6 0 )外殼 (6 0 1 )頭殼 (6 0 2 )長桿 (6 1 )開關構造 (6 2 )汽缸 (6 2 1 )傳動主軸 (6 2 2 )傘形齒輪 (6 3 )心軸 (6 5 )傳動頭 (6 4 )心軸傘形齒輪 12The present invention relates to a pneumatic tool angular transmission head transmission device. Please refer to the preferred embodiment of the first to fourth figures, which includes an outer casing (a pneumatic motor mounted on the outer casing (i 〇) (2 〇) and - open $ construction (3 0), and a drive head (40) combined with a pneumatic motor (2 〇), where: 'The outer casing (10) is provided with a head shell (1 1 ) and a a long rod (1 2 ) coupled to the head shell (1 1 ), wherein the head shell (1 1 ) is provided with a cylindrical mounting portion (1 1 1 ) and a mounting portion (1 1 1 ) An extension portion (1 1 2 ) extending outwardly from the side, an assembly groove (1 1 1 1 ) is formed inside the mounting portion (1 1 1 ), and the assembly groove (1 1 1 1 ) is cylindrical and forms a front end The front opening (1 1 1 2) forms a ring-shaped fixing screw (1 1 1 3 ) on the wall surface of the periphery of the front opening (worker 12), and is recessed in the center of the rear end of the assembly groove (1 1 1 1 ). Forming a circular bearing housing groove (1 1 1 4 ), and respectively forming a ring-shaped exhaust groove on the front and rear sides of the circumferential side wall surface of the assembly groove (1 1 1 1 ) (1 1丄 extension (1 1 2) is a round rod And a fixing screw hole (1 1 2 1 ) is formed in the outer end surface, and an assembly groove (1 1 1 ) between the inner end of the fixing screw hole (1 1 2 1 ) and the two exhaust groove grooves (1 1 1 5 ) 1) A gas inlet hole (1 1 2 2 ) is inserted between the wall surface 7 and 200821108, and a pair of vent holes are respectively arranged on both sides of the air inlet hole (1 1 2 2 ) at the extension portion (1 1 2 ) ( 2丄2 3 ), each vent hole (i丄2 3 )-end is connected to each exhaust groove (丄工5), and the other end is connected to the fixed screw hole (丄丄2丄); long rod (1 2) is a straight pipe body and forms a gas chamber (1 2 1 ) inside, and a long rod (12) is formed on the outer peripheral surface of the front end and is matched with a fixing screw hole (1 1 2 1 ) to form a threaded portion (1 2 2 ). The threaded portion (1 2 2 ) is screwed to the fixing screw hole (1 1 2 1 ), and the air inlet hole (1 1 2 2 ) and the exhaust hole (1 1 2 3 ) communicate with the air chamber (i 2 i ) A rear opening (2 2 3 ) is formed at the rear end of the air chamber (1 2 1 ), and a ring-shaped screw-threaded thread (丄 2 4 ) is formed on the wall surface around the rear opening (Work 2 3 ). (2 0 ) with a steam red (2 i ), steam red (2 work) system body and embedded in the assembly tank (1111), cylinder ( 21) is a venting hole (2 1 1 ) in the surrounding system and a plurality of air outlet holes (2丄2) arranged in a ring shape and located on the front side and the rear side of the air inlet hole (2 1 1 ), the air inlet hole (2 1 1 ) It is connected to the air inlet hole (1 1 2 2 ), and each air outlet hole (2 1 2 ) is matched with each row m, 箠f, r, and the mouth drain groove (L丄i 5 ) and each exhaust The holes (1 1 2 3 ) communicate with each other, and a rear bearing seat (2 2) is assembled on the rear side of the cylinder (2 1 ), and the rear vehicle is accommodated in the bearing housing groove by the bearing seat (22) (1 1 1 4) and internally assembled - rear bearing (2 2 1 ), on the front side of the cylinder (2 13 is provided - front bearing seat (2 3), the front bearing seat (23) is surrounded by the impact groove (1 1 1 1) The front side wall is fixed and a front bearing (2 3 丄) square is embedded inside. A rotor (2 4 ) is arranged in the flying cylinder (2 1 ), and a plurality of 荦# f 9 g 1 / tea month (2 5 ) 'in the axial position of the rotor (2 4 ) are interposed around the rotor (2 4 ) 8 200821108 Empty a mandrel (2 6 ), the core 4rL f OP, 6) the rear end pivots through the rear bearing 2 1), the front end pivots the front bearing (2 q Ί 1廿ώ Yishan MTT 9 ? Η 2 3 1 The front end of the sub-end is open at the front end of the mandrel (26) and forms a joint screw (2 6 1 ), and is provided with a positioning ring (27), and the positioning ring (the ring body is formed with a positioning thread around) 2 7丄), the front bearing housing (23) is assembled and positioned by 71) screwing on the side edge of the billet holder (22 3 ). The switch structure (30) is provided with a rotating room (3 χ). Turning room: 31) The screw is coupled to the long rod ((1) rear opening (123: snail: tooth (1 ")' in rotation (5) (3 1 The front end corresponds to the intake air (丄1 2 2 ) and an intake pipe (3 2 ) is extended forward, so that the front end edge abuts against the rear end edge of the feed gas π (1122) and is connected to the % rotary valve (31). The rear end is provided with a duct joint (33), and the air duct connector (3 3) is connected to the intake pipe (3 2) by a rotary valve (3), and is surrounded by the wide (31) A plurality of pores (3 1 1 ) are bored in the axial direction. The front end of each of the money holes (3 i丄) communicates with the gas chamber q 2 1 ) and the rear end passes through the peripheral wall of the rear end of the rotating chamber (3 χ ). 4 0) is the disc body and is provided at the axial center of the rear side - the drive screw 2 ( 4 1 )' is screwed to the mandrel with the drive screw hole (4 1 ) (2) A screw (4 2 ) as a joint structure is vertically extended toward the front of the shaft at the front side of the drive cymbal (4 〇). When the present invention is used, please refer to the preferred embodiment of the fourth and fifth figures. Connect a duct (5 〇) with a duct fitting (3 3) and Yu Chuan 9 200821108 The screw (4 2 ) screw of the moving head (4 0 ) is combined with the knife (5丄). When used, the gas of the rotary valve (31)' of the rotary switch configuration (30) is via the intake air. * (32) Guided to the air intake hole 22) 'The air intake hole (1122) passes through the air inlet hole (2 (1) into the pneumatic motor tube (6) to drive the spindle (2) (2) to rotate, so that the drive head (40) drives the tool ( 51) Processing effect; the air flow after driving the mandrel (26) in the air motor (20) is guided by the exhaust gas 1 2) through the exhaust groove (1 1 1 5), and then through the exhaust hole (11 23 And through the air chamber (12 " by the switch construction (3 〇) of each of the pores (311) outward discharge, thereby achieving the effect of the airflow tracking sub-drive air motor (20) α to rotate the tool (51) Since the air motor (2 ◦) of the present invention is installed in the head casing (1 1 ) and directly drives the cutter (5 丄) in conjunction with the transmission head (4 〇), the drive is directly known to reduce the loss of mechanical efficiency. And reduce the failure rate, and because of the compact structure of the direct drive, it is easy to achieve cost-effective assembly. The technical means of the present invention are disclosed only to illustrate the preferred state of the present invention, but it is not intended to limit the embodiments of the present invention to the preferred embodiments disclosed above. The device of the present invention, which is substantially the same as the technical means disclosed in the present invention, should not be excluded from the scope of the claimed invention as claimed in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS 200821108 The first drawing is a perspective view of a preferred embodiment of the present invention. The second drawing is a cross-sectional view of the head of a preferred embodiment of the invention. The third figure is an exploded view of the head of the preferred embodiment of the present invention. The fourth drawing is a side view of a preferred embodiment of the invention. Figure 5 is a schematic view of the head airflow direction of the preferred embodiment of the present invention. Figure 6 is a partial cross-sectional view of a pneumatic tool. [Description of main component symbols] (1 0 ) Housing (1 1 ) Head housing (111) mounting part (1 1 1 1 ) Assembly slot (1112) Front opening (1 1 1 3 ) Fixing screw (1 1 1 4 ) bearing housing groove (1 1 1 5 ) exhaust groove (112) extension (1 1 2 1 ) fixing screw hole (1 1 2 2 ) air inlet hole (1 1 2 3 ) vent hole (12) Long rod (1 2 1) air chamber (1 2 2) threaded portion (1 2 3 ) rear opening (1 2 4) screw lock screw (2 0 ) air motor (21) cylinder (2 1 1 ) air inlet ( 212) Outlet (2 2 ) Rear bearing housing (2 2 1 ) Rear bearing (2 3 ) Front bearing housing (2 3 1 ) Front bearing (2 4 ) Rotor (2 5 ) Blade (2 6 ) Mandrel (2 6 1) Connecting thread (2 7 ) Positioning ring (2 7 1 ) Positioning thread (3 0 ) Switching structure (3 1 ) Rotating valve (3 1 1 ) Venting hole 200821108 (3 2 ) Intake pipe (3 3 ) Wind Pipe joint (4 0 ) drive head (4 1 ) drive screw hole (4 2 ) screw (5 0 ) air duct (5 1 ) cutter (6 0 ) outer casing (6 0 1 ) head shell (6 0 2 ) long rod (6 1) Switch construction (6 2 ) Cylinder (6 2 1 ) Drive spindle (6 2 2 ) Bevel gear (6 3 ) Mandrel (6 5 ) Drive head (6 4 ) Mandrel bevel gear 12