1331954 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種氣動工具，特別是指一種可以切 換排氣方向的氣動工具之排氣方向切換裝置。 【先前技術】 如圖1所示’美國帛5,353,771號專利案所請求之氣動 工具10具有一本體11，一形成在該本體u内的馬達室12 ，为別形成於該本體11内並與該馬達室12連通的一進氣通 道13、一排氣通道14, 一呈可轉動地安裝在該馬達室12 内的氣動馬達15，分別安裝找本體u内並位於該氣動馬 達15前端、後端的二排氣蓋16，一安裝於該本體丨丨用以 控制進氣或非進氣的控制單元17，一密封地安裝於該本體 11後端並設置有一排氣孔181的側向排氣蓋18，及一穿過 該側向排氣蓋18並螺鎖於該本體丨丨後端的進氣接頭19。 使用時，是先將高壓氣體經由該進氣接頭19導入該進 氣通道13，等间壓氣體進入該馬達室12即可驅動該氣動馬 達15，同時該馬達室12内的廢氣可經由前述排氣蓋16流 入該排氣通道14，最後經由該側向排氣蓋18的排氣孔i8i 側向排出。 如圖2所示，美國第6，158,528號專利案所請求之氣動 工具20具有一本體21，一形成在該本體21内的馬達室 ，分別形成於該本體21内並與該馬達室22連通的一進氣 通道23、一排氣通道24, 一呈可轉動地安裝在該馬達室22 内的氣動馬達25，一呈密封且可轉動地安裝於該本體21的 5 後端大徑孔211内並設置有一排氣孔261的側向排氣蓋 26 螺鎖入該本趙21的一後端小徑孔212的接頭27，一 穿過該側向排氣蓋26並套裝在該接頭27外的空氣軟管連 接器28，及一安裝於該本體21用以控制進氣或非進氣的控 制單元29。 使用時，藉由該側向排氣蓋20可相對於該空氣軟管連 接器28轉動，可以調整該排氣孔261的位置，進而產生可 以調整側向排氣位置的使用功能。 上述專利案雖然都具有可以側向排氣的使用功能，但 是有些工作場所不論側向排氣位置怎麼調整，廢氣還是會 排放到使用者身上，讓使用者感到不舒服，故上述專利案 還疋存有無法切換排氣方向、無法符合使用者使用需求的 缺失》 【發明内容】 因此，本發明之目的是在提供一種可以切換排氣方向 以符合使用者使用需求的氣動工具之排氣方向切換裝置。 於疋，本發明排氣方向切換裝置是安裝於一氣動工具 ，該氣動工具具有一沿一軸線延伸的本體，一形成在該本 體内的馬達室，分別形成在該本體内並連通該馬達室的一 進氣通道與一排氣通道，及一呈可轉動地安裝在該馬達室 内的氣動馬達，該本體具有一大徑部’一自該大徑部朝向 後端縮徑延伸的小徑部，一形成在該大徑部與該小徑部之 間的肩部’及設置於該肩部且連通該排氣通道的至少一穿 孔。該排氣方向切換裝置包含一套設於該大徑部的排氣外 1331954 蓋’-呈可沿該轴線移動地安裝在該排氣外蓋與該小徑部 之間的排氣内蓋，及一沿該軸線組結於該小徑部的進氣接 頭單元。 該排氣外蓋是呈密封地套置於該大徑部，包括分別以 不等徑部圍繞該軸線的一内環面與一外環面，及連接該内 環面和該外環面的一前連接面與一後連接面。 該排氣内蓋包括分別以不等徑部圍繞該軸線的一内環 面與一外環面，連接該内環面和該外環面的一前連接面與 後連接面，一自該内環面朝向該軸線設置用以貼觸該小 徑部的導移環塊，及連通該外環面與該内環面的至少一排 氣孔，該導移環塊與該小徑部及該内環面之間並配合形成 一連通前述穿孔的容氣室。該排氣内蓋並可相對該排氣外 蓋在一後向排氣位置及一側向排氣位置之間移動。 該進氣接頭單元是用以將高壓氣體輸入該進氣通道。 藉由上述組成’當將該排氣内蓋移動到該後向排氣位 置，則當廢氣流入該容氣室内，將經由該排氣外蓋的後連 接面與該排氣内蓋之間的間隙朝向後向排出，當將該排氣 内蓋移動到該側向排氣位置，則當廢氣流入該容氡室内， 可經由前述排氣孔直接自側向排出，藉此使本發明具有可 以切換排氣方向以符合使用者使用需求的特性。 【實施方式】 本發明氣動工具之排氣方向切換裝置前述以及其他技 術内容、特點與功效，在以下配合參考圖式之三較佳實施 例的詳細說明中，將可清楚的明白。 7 1331954 在本發明被詳細描述之前，要注意的是，在整篇說明 中所使用的相對位置用語，例如“前”、“後，，是以使用 者的常操作方位為基準，且類似的元件是以相同的標號 說明。 如圖3、4、5所示，本發明排氣方向切換裝置是安 裝於一氣動工具30，該氣動工具3〇具有一沿一轴線！延伸 的本體3卜-形成在該本體31内的馬達室Μ，分別形成 在該本體31内並連通該馬達室32的—進氣通道與一排 氣通道34…呈可轉動地安裝在該馬達室32内的氣動馬達 35’ -套設在該本冑31外的殼趙％，及—安裝在該殼體 36與該本體31之間並連通該進氣通道33且可在—進氣位 置及一非進氣位置之間移動的控制單元37〇該本體31具有 大仏部311 ’ -自該大控部3 i j朝向後端縮徑延伸的小徑 部312’ -形成在該大徑部川與該小徑部312之間的肩部 313，及設置於該肩部313且連通該排氣通道34的二對稱 穿孔314。 該排氣方向切換裝置的一第一較佳實施例包含一套設 於該大徑部311的排氣外蓋4〇，一呈可沿該軸線ι移動地 安裝在該排氣外蓋40與該小徑部312之間的排氣内蓋5〇， 及一沿該轴線I組結於該小徑部312的進氣接頭單元6〇。 該排氣外蓋40包括以不等徑部圍繞該軸線〗的一内環 面41與一外環面42，連接該内環面41和該外環面42的一 前連接面43與一後連接面44,及自該後連接面44朝向該 軸線I凸設的數擋塊45，每二擋塊45之間並形成—凹口 8 1331954 較佳地，該較佳實施例還包含—套置於該大徑部3ΐι的 密封環70」是可與該排氣外蓋4〇的内環面41密貼，以使 該排氣外蓋4G的前連接面43是呈密封地套設於該大徑部 311 ’至於該後連接面44，當省略前述擋塊衫時是呈開 放狀。1331954 IX. Description of the Invention: TECHNICAL FIELD The present invention relates to a pneumatic tool, and more particularly to an exhaust direction switching device for a pneumatic tool that can change an exhaust direction. [PRIOR ART] A pneumatic tool 10 as claimed in the 'U.S. Patent No. 5,353,771, the entire disclosure of which is incorporated herein by reference. An air intake passage 13 communicating with the motor chamber 12, an exhaust passage 14, and a pneumatic motor 15 rotatably mounted in the motor chamber 12 are respectively mounted in the body u and located at the front end and the rear end of the air motor 15 a venting cover 16 , a control unit 17 mounted on the main body 控制 for controlling intake or non-intake, a lateral venting cover sealingly mounted on the rear end of the body 11 and provided with a venting opening 181 18, and an air inlet joint 19 passing through the lateral exhaust cover 18 and screwed to the rear end of the body. In use, the high-pressure gas is first introduced into the intake passage 13 via the intake joint 19, and the inter-pressure gas enters the motor chamber 12 to drive the air motor 15, and the exhaust gas in the motor chamber 12 can pass through the aforementioned row. The gas cap 16 flows into the exhaust passage 14 and is finally discharged laterally via the exhaust hole i8i of the lateral exhaust cover 18. As shown in FIG. 2, the pneumatic tool 20 claimed in U.S. Patent No. 6,158,528 has a body 21, and a motor chamber formed in the body 21 is formed in the body 21 and communicates with the motor chamber 22, respectively. An air inlet passage 23, an exhaust passage 24, a pneumatic motor 25 rotatably mounted in the motor chamber 22, and a 5 rear end large diameter hole 211 which is sealed and rotatably mounted to the body 21. A lateral venting cover 26 having a venting opening 261 is screwed into the joint 27 of a rear end small diameter hole 212 of the ejector 21, passing through the lateral venting cover 26 and fitting the joint 27 An outer air hose connector 28, and a control unit 29 mounted to the body 21 for controlling intake or non-intake. In use, the lateral venting cap 20 is rotatable relative to the air hose connector 28, and the position of the venting opening 261 can be adjusted to provide a function to adjust the lateral venting position. Although the above patents all have the function of being able to ventilate sideways, in some workplaces, no matter how the lateral exhaust position is adjusted, the exhaust gas will be discharged to the user, which makes the user feel uncomfortable. There is a lack of switching of the exhaust direction and the inability to meet the user's needs. [Invention] Therefore, the object of the present invention is to provide an exhaust direction switching of a pneumatic tool that can switch the exhaust direction to meet the user's needs. Device. In the present invention, the exhaust direction switching device of the present invention is mounted on a pneumatic tool having a body extending along an axis, a motor chamber formed in the body, respectively formed in the body and communicating with the motor chamber An air intake passage and an exhaust passage, and a pneumatic motor rotatably mounted in the motor chamber, the body having a large diameter portion 'a small diameter portion extending from the large diameter portion toward the rear end a shoulder portion formed between the large diameter portion and the small diameter portion and at least one perforation provided in the shoulder portion and communicating with the exhaust passage. The exhaust direction switching device includes a set of exhaust gas outside the large diameter portion 1331954, and a cover that is movably mounted along the axis between the exhaust outer cover and the small diameter portion And an intake joint unit that is coupled to the small diameter portion along the axis. The exhaust outer cover is sealingly disposed on the large diameter portion, and includes an inner annular surface and an outer annular surface respectively surrounding the axis by the unequal diameter portion, and connecting the inner annular surface and the outer annular surface A front connecting surface and a rear connecting surface. The exhaust inner cover includes an inner annular surface and an outer annular surface respectively surrounding the axis with the unequal diameter portion, and a front connecting surface and a rear connecting surface connecting the inner annular surface and the outer annular surface, a guiding ring for contacting the small diameter portion, and at least one venting hole connecting the outer annular surface and the inner annular surface, the guiding ring block and the small diameter portion and the annular surface The inner annular faces cooperate to form a gas plenum that communicates with the aforementioned perforations. The exhaust inner cover is movable relative to the exhaust outer cover between a rearward exhaust position and a sideward exhaust position. The intake joint unit is for inputting high pressure gas into the intake passage. By moving the exhaust inner cover to the rearward exhaust position by the above composition, when the exhaust gas flows into the air-to-air chamber, between the rear connection surface of the exhaust gas cover and the exhaust inner cover The gap is discharged toward the rearward direction. When the exhaust inner cover is moved to the lateral exhaust position, when the exhaust gas flows into the chamber, the discharge can be directly discharged laterally via the exhaust hole, thereby enabling the present invention to Switch the exhaust direction to meet the characteristics of the user's needs. [Embodiment] The foregoing and other technical contents, features and effects of the venting direction switching device of the pneumatic tool of the present invention will be apparent from the following detailed description of the preferred embodiment of the third embodiment. 7 1331954 Before the present invention is described in detail, it is to be noted that the relative positional terms used in the entire description, such as "front" and "after", are based on the user's usual operating orientation, and are similar. The components are illustrated by the same reference numerals. As shown in Figures 3, 4 and 5, the exhaust direction switching device of the present invention is mounted on a pneumatic tool 30 having a body extending along an axis! - a motor chamber 形成 formed in the body 31, respectively formed in the body 31 and communicating with the motor chamber 32 - an intake passage and an exhaust passage 34 ... are rotatably mounted in the motor chamber 32 The motor 35' is mounted on the outside of the casing 31, and is mounted between the casing 36 and the body 31 and communicates with the intake passage 33 and is at an intake position and a non-intake a control unit 37 that moves between positions, the body 31 has a large portion 311' - a small diameter portion 312' extending from the large control portion 3 ij toward the rear end diameter - formed in the large diameter portion and the small diameter portion a shoulder 313 between the 312, and disposed on the shoulder 313 and communicating with the exhaust passage 34 a second symmetric perforation 314. A first preferred embodiment of the exhaust direction switching device includes a plurality of exhaust outer covers 4A disposed on the large diameter portion 311, and a row is movably mounted along the axis An exhaust inner cover 5A between the gas outer cover 40 and the small diameter portion 312, and an intake joint unit 6A assembled to the small diameter portion 312 along the axis I. The exhaust outer cover 40 includes An inner annular surface 41 and an outer annular surface 42 surrounding the axis with an unequal diameter portion, a front connecting surface 43 and a rear connecting surface 44 of the inner annular surface 41 and the outer annular surface 42 are connected, and The plurality of stops 45 protruding from the rear connecting surface 44 toward the axis I, and each of the two blocks 45 is formed with a notch 8 1331954. Preferably, the preferred embodiment further includes a sleeve disposed on the large diameter portion 3ΐ The sealing ring 70 ′′ is affixed to the inner annular surface 41 of the exhaust outer cover 4 , such that the front connecting surface 43 of the exhaust outer cover 4G is sealingly sleeved on the large diameter portion 311 ′ The rear connecting surface 44 is open when the stopper shirt is omitted.
該排氣内蓋50包括以不等徑部圍繞該轴線ι的一内環 面51與一外環面52,連接該内環面51和該外環面52的一 前連接面53與-後連接面54，—自該外環面52㈣成型 並鄰近或平齊該前連接面53的凸環55…套置於該凸環 55的密封環56,—自該内環面51朝向該軸線！設置用以貼 觸該小徑部312的導移環塊57，連通該外環面52與該内環 面51並與該軸線Γ相交的至少一排氣孔58，及設置於該外 環面52並鄰近或平齊該後連接面54的數抓握塊59。The exhaust inner cover 50 includes an inner annular surface 51 and an outer annular surface 52 surrounding the axis ι with an unequal diameter portion, and a front connecting surface 53 connecting the inner annular surface 51 and the outer annular surface 52 with - a rear connecting surface 54, a convex ring 55 formed from the outer annular surface 52 (four) and adjacent or flushing the front connecting surface 53 ... a sealing ring 56 of the convex ring 55 - from the inner annular surface 51 toward the axis ! a guiding ring block 57 for contacting the small diameter portion 312, at least one venting opening 58 communicating with the inner annular surface 52 and the inner annular surface 51 and intersecting the axis Γ, and the outer annular surface 52 and adjacent or flush the number of gripping blocks 59 of the rear connecting face 54.
則述抓握塊59具有可供使用者抓握以方便移動該排氣 内蓋5 0的作用。 當該排氣内蓋50被安裝在該排氣外蓋40内時，該密 封％ 56恰可與該内環面41密貼，使該前連接面呈密封 地位於該排氣外蓋40内，同時該導移環塊57貼觸於該小 徑部312 ’該導移環塊57與該小徑部312及該内環面5丨之 間並配合形成一連通前述穿孔314的容氣室80,及該排氣 内蓋50是可在相對於該排氣外蓋40的一後向排氣位置及 —側向排氣位置之間移動，當該排氣内蓋50在該後向排氣 位置時’前述排氣孔58是位於該排氣外蓋40内，當該排 9 1331954 氣内蓋50被沿該軸線Γ朝向後端拉出並位於該側向排氣位 置時，别述排氣孔58是位於該排氣外蓋4〇外（見圖6)，此 外，藉由則述擋塊45與該凸環55的配合可以限制該排氣 内蓋50的移動行程，進而可以防止該排氣内蓋5〇脫離該 排氣外蓋40。 該進氣接頭單元60包栝一沿該軸線I螺鎖於該小徑部 312的螺鎖接頭61，及一呈可轉動且密封地插入該螺鎖接 頭61内並設置有一進氣入口 621的連接頭62。 該連接頭62是用以與一高壓氣體供給單元9〇的一接 頭91連接’進而可以將高壓氣體輸入該進氣入口 621、該 進氣通道33、該馬達室32内以驅動該氣動馬達35。 使用時，如圖3、5所示，當使用者使用本發明氣動 工具且位於該氣動工具旁側時，可以切換排氣方向使廢氣 自後向排出’以免廢氣排放到身上，使用者只需將該排氣 内蓋50推移到該後向排氣位置，使前述排氣孔58位於該 排氣外蓋40内’則當該馬達室32内的廢氣流入該排氣通 道34並經由前述穿孔314流入該容氣室8〇，接著經由前述 排氣孔58流出，最後就可經由前述擋塊45與該外環面52 之間的間隙及前述凹口 46(見圖4 )朝向後向排出。 值得說明的是，若省略前述擋塊45、凸環55，則前述 廢氣最後是經由該排氣外蓋40的後連接面44與該外環面 52之間的間隙朝向後向排出。 如圖3、6所示，當使用者使用本發明氣動工具且位 於該風!動工具後方時’可以切換排氣方向使廢氣自側向排 10 1331954 出’以免廢氣排放到身上’使用者只需手握前述抓握塊59 將該排氣内蓋50沿該軸線I朝向後端拉移到該側向排氣位 置’使前述排氣孔58位於該排氣外蓋40外，此時，當該 馬達至32内的廢氣流入該排氣通道34並經由前述穿孔314 流入該容氣室80，就可經由前述排氣孔58直接朝向側向排 出。 如圖7所示，該較佳實施例更包含一沿徑向安裝固定 在該排氣外蓋40與該本體的大徑部311之間的定位件1〇〇 ，具有可以防止該排氣外蓋40轉動以提高該排氣内蓋5〇 的移動順暢性的作用。 如圖8、9所示，該排氣方向切換裝置的一第二較佳 實施例與該第一較佳實施例相同包含有一排氣外蓋4〇，一 排氣内蓋50,及一進氣接頭單元6〇。 該排氣外蓋40同樣包括有一内環面41、一外環面42 ，一前連接面43、一後連接面44、數擋塊45，及數凹口 46 〇 該排氣内蓋50同樣包括有一内環面51、一外環面52 、一刚連接面53、一後連接面54、一凸環55、一密封環 56、一導移環塊57、至少一排氣孔58，及數抓握塊。 兩個實施例的不同處在於該第二較佳實施例的排氣内 蓋50是套置固定在該本體31的小徑部312外至於該排 氣外蓋40則是呈可沿該軸線！移動的安裝在該本體31的大 徑部311與該排氣内蓋5〇之間，並可在㈣於該排氣内蓋 50的一後向排氣位置及一側向排氣位置之間移動。 11 1331954 當該排氣外蓋40位於該後向排氣位置時，則該氣動工 具30的廢氣同樣是流入該容氣室80,接著經由前述排氣孔 58流出’最後就可經由前述擋塊45與該外環面52之間的 間隙及前述凹口 46朝向後向排出。同理，若省略前述擋塊 45、凸環55，則前述廢氣最後是經由該排氣外蓋4〇的後連 接面44與該外環面52之間的間隙朝向後向排出。 當該排氣外蓋40位於該側向排氣位置時，則該氣動工The gripping block 59 has a function for the user to grasp to facilitate the movement of the exhaust inner cover 50. When the exhaust inner cover 50 is installed in the exhaust outer cover 40, the seal % 56 is just in close contact with the inner annular surface 41, so that the front connecting surface is sealingly located in the exhaust outer cover 40. At the same time, the guiding ring block 57 is in contact with the small diameter portion 312 ′ between the small guiding portion 57 and the inner annular surface 5 并 and cooperates to form a gas chamber communicating with the through hole 314 . 80, and the exhaust inner cover 50 is movable between a rearward exhaust position and a lateral exhaust position relative to the exhaust outer cover 40, when the exhaust inner cover 50 is in the rearward row In the air position, the aforementioned exhaust hole 58 is located in the exhaust outer cover 40. When the row 9 1331954 gas inner cover 50 is pulled out along the axis toward the rear end and is located at the lateral exhaust position, The exhaust hole 58 is located outside the exhaust cover 4 (see FIG. 6). Further, by the cooperation of the stopper 45 and the convex ring 55, the movement stroke of the exhaust inner cover 50 can be restricted, and thus The exhaust inner cover 5 is prevented from coming off the exhaust outer cover 40. The air inlet connector unit 60 includes a screw joint 61 screwed to the small diameter portion 312 along the axis I, and a rotatably and sealingly inserted into the screw joint 61 and provided with an air inlet 621. Connector 62. The connector 62 is for connecting with a connector 91 of a high-pressure gas supply unit 9'. Further, high-pressure gas can be input into the intake port 621, the intake passage 33, and the motor chamber 32 to drive the air motor 35. . When in use, as shown in Figures 3 and 5, when the user uses the pneumatic tool of the present invention and is located beside the pneumatic tool, the exhaust direction can be switched to exhaust the exhaust gas from the rear to prevent the exhaust gas from being discharged to the body, and the user only needs to The exhaust inner cover 50 is moved to the rearward exhaust position, and the exhaust hole 58 is located in the exhaust outer cover 40. Then, when the exhaust gas in the motor chamber 32 flows into the exhaust passage 34 and through the through hole 314 flows into the air plenum 8 〇, then flows out through the vent hole 58 , and finally can be discharged backward through the gap between the stopper 45 and the outer ring surface 52 and the aforementioned recess 46 (see FIG. 4 ). . It is to be noted that when the stopper 45 and the collar 55 are omitted, the exhaust gas is finally discharged toward the rear through the gap between the rear connecting surface 44 of the exhaust outer cover 40 and the outer ring surface 52. As shown in Figures 3 and 6, when the user uses the pneumatic tool of the present invention and is located behind the wind power tool, the exhaust direction can be switched so that the exhaust gas is discharged from the lateral row 10 1331954 to prevent the exhaust gas from being discharged to the body. The suction gripper 59 is required to be pulled along the axis I toward the rear end to the lateral exhaust position, so that the exhaust hole 58 is located outside the exhaust outer cover 40. When the exhaust gas from the motor 32 enters the exhaust passage 34 and flows into the air plenum 80 through the through hole 314, it can be directly discharged laterally via the vent hole 58. As shown in FIG. 7, the preferred embodiment further includes a positioning member 1〇〇 radially mounted between the exhaust outer cover 40 and the large diameter portion 311 of the body, which has a function of preventing the exhaust The cover 40 is rotated to enhance the smoothness of the movement of the exhaust inner cover 5〇. As shown in FIGS. 8 and 9, a second preferred embodiment of the exhaust direction switching device includes an exhaust cover 4A, an exhaust inner cover 50, and a feed, similar to the first preferred embodiment. Air connector unit 6〇. The exhaust cover 40 also includes an inner annular surface 41, an outer annular surface 42, a front connecting surface 43, a rear connecting surface 44, a plurality of stops 45, and a plurality of recesses 46. The exhaust inner cover 50 is the same The utility model comprises an inner annular surface 51, an outer annular surface 52, a rigid connecting surface 53, a rear connecting surface 54, a convex ring 55, a sealing ring 56, a guiding ring block 57, at least one venting opening 58, and Count the grip block. The difference between the two embodiments is that the exhaust inner cover 50 of the second preferred embodiment is sleeved and fixed outside the small diameter portion 312 of the body 31, and the exhaust outer cover 40 is along the axis! The moving portion is disposed between the large diameter portion 311 of the body 31 and the exhaust inner cover 5〇, and between (4) a rearward exhausting position and a sideward exhausting position of the exhaust inner cover 50. mobile. 11 1331954 When the exhaust gas outer cover 40 is located in the rearward exhausting position, the exhaust gas of the pneumatic tool 30 also flows into the air-receiving chamber 80, and then flows out through the aforementioned exhaust hole 58 'finally through the aforementioned stop block The gap between the 45 and the outer annular surface 52 and the recess 46 are discharged toward the rear. Similarly, if the stopper 45 and the collar 55 are omitted, the exhaust gas is finally discharged toward the rear through the gap between the rear connecting surface 44 of the exhaust outer cover 4 and the outer ring surface 52. When the exhaust cover 40 is in the lateral exhaust position, the pneumatic worker
具30的廢氣同樣是流人該容氣室8G，最後經由前述排氣孔 58直接朝向側向排出。 如圖10、1 1所示，該排氣方向切換裝置的一第三 較佳實施例與該第一較佳實施例相同包含有一排氣外蓋40 ，一排氣内蓋50,及一進氣接頭單元6〇。 該排氣外蓋40同樣包括有一内環面41、一外環面42 ，-前連接面43、—後連接面44，及自該後連接面44朝 向該轴線I凸設的數擋& 45，與該第一較佳實施例的不同 處，在於該排氣外蓋40更包括有連通該内環面Μ與該外 環面42的至少一排氣孔47。 一外環面52 該排氣内蓋50同樣包括有一内環面51 、-前連接面53、-後連接面54、—凸環55、—密封環 56 ’及設置於該外環面52 #數抓握塊59，與該第—較佳實 施例的不同處，在於該第三較佳實施例的排氣内蓋50省略 了前述導移環塊57、排氣孔58(見圖4、 該小徑部312的開放端朝 此外，該本體31更具有— 向徑向成型的支撐凸緣315。 12 1331954 當該排氣内蓋50位於該後向排氣位置時，則該氣動工 具30的廢氣是經由穿孔314流出，最後經由該排氣内蓋咒 的後連接面54與該本體31的小徑部312之間的間隙直接 朝向後向排出。 當該排氣内蓋50位於該側向排氣位置時，則該氣動工 具30的廢氣是經由穿孔314流出，最後經由該排氣外蓋4〇 的排氣孔47直接朝向侧向排出。 歸納上述，本發明氣動工具之排氣方向切換裝置具有 如下所述之功效及優點，故確實能達成發明目的：， 一、因為本發明只需調整該排氣内蓋50使其位於該後 向排氣位置或該側向排氣位置，就可以產生切換排氣方向 的效果，使本發明具有可以依使用者使用需求切換成後向 排氣或側向排氣，讓廢氣不會排放到使用者身上以提高使 用舒適感的功效及優點。 一、因為本發明只需調整該排氣外蓋40使其位於該後 向排氣位置或該側向排氣位置，就可以產生切換排氣方向 的效果，使本發明具有可以依使用者使用需求切換成後向 排氣或側向排氣，讓廢氣不會排放到使用者身上以提高使 用舒適感的功效及優點。 惟以上所述者，僅為本發明之三較佳實施例而已，當 不能以此限定本發明實施之範圍，即大凡依本發明申請專 利範圍及發明說明内容所作之簡單的等效變化與修飾，皆 仍屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 13 1331954 圖1是美國第5,353,771號專利案的一組合剖視圖； 圖2是美國第6，158,528號專利案的一組合剖視圖； 圖3是本發明排氣方向切換裝置一第一較佳實施例安 裝於一氣動工具的外觀圖； 圖4是該第一較佳實施例的一分解立體圖； 圖5是該第一較佳實施例的一局部組合剖視圖，說明 一排氣内蓋位於一後向排氣位置； 圖6是一類似於圖5的視圖，說明該排氣内蓋位於一 側向排氣位置； 圖7是一類似於圖6的視圖，說明在一排氣外蓋與一 本體之間安裝一定位件； 圖8是本發明排氣方向切換裝置一第二較佳實施例的 局部組合剖視圖，說明一排氣外蓋位於一後向排氣位置； 圖9是一類似於圖8的視圖，說明該排氣外蓋位於一 側向排氣位置； 圖10是本發明排氣方向切換裝置一第三較佳實施例 的局部組合剖視圖，說明一排氣内蓋位於一後向排氣位置 :及 圖1 1是一類似於圖1 〇的視圖，說明該排氣内蓋位 於一侧向排氣位置。 14 1331954 【主要元件符號說明】 30.. ..氣動工具 31.. ..本體 3 11...大徑部 312.. .小徑部 313.. .肩部 314.. .穿孔 32馬達室 33____進氣通道 34.…排氣通道 3 5 ....氣動馬達 3 6…·殼體 37.. ..控制單元 40.…排氣外蓋 41.. ..内環面 42….外環面 43 —前連接面 44.. ..後連接面 45. …擋塊 46. …凹口The exhaust gas having the water 30 is also discharged into the air chamber 8G, and finally discharged directly toward the side via the exhaust hole 58. As shown in FIG. 10 and FIG. 1 , a third preferred embodiment of the exhaust direction switching device includes an exhaust outer cover 40 , an exhaust inner cover 50 , and a same as the first preferred embodiment. Air connector unit 6〇. The exhaust outer cover 40 also includes an inner annular surface 41, an outer annular surface 42, a front connecting surface 43, a rear connecting surface 44, and a plurality of gears &s protruding from the rear connecting surface 44 toward the axis I. 45. The difference from the first preferred embodiment is that the exhaust outer cover 40 further includes at least one venting opening 47 communicating the inner annular surface and the outer annular surface 42. An outer annular surface 52 also includes an inner annular surface 51, a front connecting surface 53, a rear connecting surface 54, a convex ring 55, a sealing ring 56', and a sealing ring 56' disposed on the outer annular surface 52 # The plurality of gripping blocks 59 differ from the first preferred embodiment in that the exhaust inner cover 50 of the third preferred embodiment omits the aforementioned guiding ring block 57 and the venting opening 58 (see FIG. 4, The open end of the small diameter portion 312 faces further, the body 31 further has a radially forming support flange 315. 12 1331954 When the exhaust inner cover 50 is in the rearward exhaust position, the pneumatic tool 30 The exhaust gas flows out through the perforations 314, and finally the gap between the rear connecting surface 54 of the exhaust inner cover and the small diameter portion 312 of the main body 31 is directly discharged toward the rear. When the exhaust inner cover 50 is located on the side When the air is discharged to the exhaust position, the exhaust gas of the pneumatic tool 30 flows out through the through hole 314, and finally is discharged toward the side through the exhaust hole 47 of the exhaust outer cover 4 。. In summary, the exhaust direction of the pneumatic tool of the present invention is as described above. The switching device has the following advantages and advantages, so it can achieve the purpose of the invention: In the present invention, only the exhaust inner cover 50 is adjusted to be located at the rearward exhaust position or the lateral exhaust position, so that the effect of switching the exhaust direction can be generated, so that the present invention can be switched according to user needs. After exhausting or laterally exhausting, the exhaust gas is not discharged to the user to improve the comfort and advantages of using comfort. 1. Because the present invention only needs to adjust the exhaust cover 40 to be located in the backward direction. The exhausting position or the lateral exhausting position can produce the effect of switching the exhausting direction, so that the present invention can be switched to the backward exhaust or the lateral exhaust according to the user's use requirement, so that the exhaust gas is not discharged to the use. The above-mentioned effects and advantages of the present invention are only for the three preferred embodiments of the present invention, and the scope of the present invention is not limited thereto. BRIEF DESCRIPTION OF THE DRAWINGS The simple equivalent changes and modifications made by the present invention are still within the scope of the present patent. [Simplified illustration] 13 1331954 Figure 1 is a US Patent No. 5,353,771 Figure 2 is a combination cross-sectional view of U.S. Patent No. 6,158,528; Figure 3 is an external view of a first embodiment of the exhaust direction switching device of the present invention mounted on a pneumatic tool; An exploded perspective view of a preferred embodiment; FIG. 5 is a partial cross-sectional view of the first preferred embodiment illustrating an exhaust inner cover in a rearward exhaust position; FIG. 6 is a view similar to FIG. Figure 7 is a view similar to Figure 6, showing a positioning member between a exhaust outer cover and a body; Figure 8 is the exhaust of the present invention A partial combination sectional view of a second preferred embodiment of the direction switching device, illustrating that an exhaust cover is located at a rearward exhaust position; FIG. 9 is a view similar to FIG. 8 illustrating the exhaust cover being located on one side Figure 10 is a partial assembled cross-sectional view of a third preferred embodiment of the exhaust direction switching device of the present invention, illustrating an exhaust inner cover at a rearward exhaust position: and Figure 11 is a view similar to Figure 1 〇 view, indicating that the exhaust inner cover is on one side Exhaust position. 14 1331954 [Description of main component symbols] 30.. .. pneumatic tool 31... body 3 11...large diameter part 312.. small diameter part 313.. shoulder 314.. perforated 32 motor room 33____ Intake passage 34....Exhaust passage 3 5 .... Air motor 3 6...·Casing 37... Control unit 40....Exhaust cover 41... Inner ring surface 42.... Outer toroidal surface 43 - front connecting surface 44.. .. rear connecting surface 45. ...stop 46. ... notch
4 7....排氣孑L 5 0....排氣内蓋 51.. ..内環面 52.. ..外環面 53.. ..前連接面 54.. ..後連接面 55.. ..凸環 56.. ..密封環4 7....Exhaust 孑L 5 0....Exhaust inner cover 51... Inner ring surface 52... Outer ring surface 53... Front connecting surface 54.. .. Connecting surface 55.. .. convex ring 56.. .. sealing ring
57.. ..導移環塊 5 8….排氣孑L 59.. ..抓握塊 60.. ..進氣接頭單元 61.. ..螺鎖接頭 62.. ..連接頭 621.. .進氣入口 70.. ..密封環 80.. ..容氣室 90.. ..高壓氣體供給單元 91.. ..接頭 100.. ..定位件 I......軸線 1557.. .. guide ring block 5 8....exhaust 孑L 59...grip block 60....intake connector unit 61.... screw-lock connector 62... connector 621 .. . Intake inlet 70... Sealing ring 80... Air chamber 90... High pressure gas supply unit 91... Connector 100... Positioning member I... Axis 15