201247368 六、發明說明： 【發明所屬之技術領域】 具之轉 [0001] 本發明係與氣動工具有關，尤指一種氣動工 速控制裝置。 [0002] 按，習用氣動工具之調速裝置，如第7圖所示 包括有-旋轉筒7 1及一旋鈕7 2，該旋轉筒J，其 Ο 穿孔73’_2苡 同71相接並可用以帶動該旋轉筒71轉動，而甘轉 機構之正轉進氣道74係設計呈可. 向 穿孔7 3相對位，而孫j / 1住〜 …此，當氣=:::7 5則與該旋轉… 一—71各=:=態時’其導 成轉速（即扭力）可 徑限制而構 ，而當氣動，逆向：作 則將直接進入切換轉川之逆導入之氣壓 成不受該旋轉筒7Ί ; 5中，而構 藉此使氣動工具在 孔7 3限制之最大轉速狀態， 為何，當切換上，無論其正轉之扭力調整狀態 ，俾供氣動卫具用冑式時，其轉速將保持在最大狀態 作、工作上更有效錢鬆螺絲時的速度得以提昇，且操 氣動工具上仍^率°惟，上述調速裝置於實際應用在 、牙以下問題存在： [0003] 人私H由㈣調速I置與其換向機構7 6係同轴整 ==關閥桿”上，因此會有同-部位之= 件過多而不易組裝之問題存在。 零組 100118759 表單編號A0101 第3頁/共21頁 1002031664- 201247368 [0004] 另就流路作動而言，上述習用之氣動工具調速裝置 由於係將該調速裝置與該換向機構7 6同軸設置於該開 關閥桿7 7上，並於該換向機構7 6與其閥套7 8之間 形成有一可供排氣之排氣流道W。然而此種結構之設計 ，由於該換向機構7 6與其閥套7 8之尺寸必須與該開 關閥桿7 7及該調速裝置相互對應，因此勢必造成該排 氣流道W之截面積會受到該換向機構7 6與其閥套7 8 之限制而相當狹窄，容易導致排氣不順並進而影響其輸 出扭力值。 [0005] 有鑑於此，故如何解決上述問題，即為本發明所欲 解決之首要課題，因此，本案發明人乃經過不斷的苦思 與試作後，才終於有本發明之產生。 【發明内容】 [0006] 本發明目的之一，係在於提供一種氣動工具之轉速 控制裝置及其轉速控制方法，其係具有可於正轉時構成 轉速（扭力）可調整狀態，而於逆轉時則保持在最大轉 速（扭力）狀態之功效。 [0007] 本發明目的之二，係在於提供一種氣動工具之轉速 控制裝置及其轉速控制方法，其係具有組裝容易並可有 效避免對氣動工具之進、排氣通道的截面積造成排氣不 足的影響。 [0008] 為達前述之目的，本發明係提供一種氣動工具之轉 速控制裝置，其包含有： [0009] 一設於氣動工具内之殼座，具有一正轉進氣道與一 100118759 表單編號A0101 第4頁/共21頁 1002031664-0 201247368 [0010] [0011] ο201247368 VI. Description of the invention: [Technical field to which the invention pertains] [0001] The present invention relates to pneumatic tools, and more particularly to a pneumatic speed control device. [0002] According to the conventional pneumatic tool of the pneumatic tool, as shown in FIG. 7, there is a rotating cylinder 7 1 and a knob 7 2, and the rotating cylinder J, the perforation 73'_2 is connected with 71 and available. In order to drive the rotating cylinder 71 to rotate, and the forward rotation inlet 74 of the Gan-spinning mechanism is designed to be opposite to the perforation 7 3, while the sun j / 1 live ~ ... this, when the gas =::: 7 5 With the rotation... When the -71 is =:= state, the conduction speed (ie, the torsion) can be limited by the diameter, and when aerodynamic, the reverse: the pressure will directly enter the reverse pressure of the switching to the river. The rotating cylinder 7Ί; 5, and thus the pneumatic tool is limited to the maximum speed state of the hole 73, why, when switching, regardless of the torque adjustment state of the forward rotation, when the pneumatic guard is used, The speed will be kept at the maximum state, the speed of the work is more effective, and the speed of the loose screw is improved, and the speed of the pneumatic tool is still low. However, the above-mentioned speed regulating device is actually applied to the following problems: [0003] The person's private H is set by the (four) speed control I and its reversing mechanism 7 6 series coaxial == off the valve stem", so there will be the same part = There are too many pieces and it is easy to assemble. Zero group 100118759 Form number A0101 Page 3 / Total 21 page 1002031664- 201247368 [0004] In terms of flow actuation, the above-mentioned conventional pneumatic tool speed control device The speed device is disposed coaxially with the switching mechanism 7 6 on the switching valve stem 7 7 , and an exhaust gas flow path W is formed between the switching mechanism 76 and the valve sleeve 7 8 . The design of the structure, since the size of the reversing mechanism 76 and the sleeve 7 8 must correspond to the switch stem 7 7 and the speed regulating device, the cross-sectional area of the exhaust runner W is bound to be affected by the The reversing mechanism 76 is quite narrow with the limitation of the valve sleeve 7 8 , which easily causes the exhaust gas to be unsmoothed and thus affects the output torque value. [0005] In view of this, how to solve the above problem is solved by the present invention. The primary problem, therefore, the inventor of the present invention has finally produced the present invention after continuous hard work and trials. [0006] One of the objects of the present invention is to provide a rotational speed control device for a pneumatic tool and Turn The control method has the effect of being able to adjust the rotational speed (torque) adjustable state during forward rotation and maintaining the maximum rotational speed (torque) state when reversing. [0007] The second object of the present invention is to provide a pneumatic The rotation speed control device of the tool and the rotation speed control method thereof have the advantages of easy assembly and can effectively avoid the shortage of exhaust gas caused by the cross-sectional area of the inlet and the exhaust passage of the pneumatic tool. [0008] For the purpose of the foregoing, the present invention The utility model provides a speed control device for a pneumatic tool, which comprises: [0009] a housing provided in a pneumatic tool, having a forward rotation air inlet and a 100118759 Form No. A0101 Page 4 / Total 21 Page 1002031664-0 201247368 [0011] [0011]
GG
[0012] 100118759 逆轉進氣道； —後盍，係與該殼座一側相對接，該後蓋具有一與 該正轉進氣道相對位之正轉流道，以及—與該逆轉進氣 道相對位之逆轉流道，其中該正轉流道中形成有一轉動 二間，並於該轉動空間一侧設有一連通至該後蓋外部之 洩壓孔； 轉迷控制件，係以其一端穿設於該轉動空間中， 該轉速控制件另-端麟出職k具本體外部，且該 速控制件於露出該氣動工具本體外部之一端接設有一 轉紐’並藉由轉動該轉紐即可同步帶動該轉速控制件相 對該轉動空間轉動’該轉速控制件伸設於該轉動空間之 ^端係具有—擋部以及—平衡部，且該轉動空間於相對 該正轉流道之兩相對内壁係呈相對凹入之圓弧狀，而該 轉速控制件之擋部與平衡部的外緣面係呈圓弧狀而可分 別與轉動空間之二IU弧狀㈣相互對應組配，且該推 縣可於該轉速控制件相對該轉動空間轉動至—預定轉 動角度時對應封閉該缝孔，而隨著該撞部之轉動角度 變化即可改變該擋部與該茂壓孔之相對位置，進而控制 該泡壓孔之缝孔徑大小，以調節由該正轉進氣道:入 該正轉流道之進氣流量。 再者’本發明更提供—種氣動卫具之轉速控制方法 ’其係利用在氣動工具之正轉流道中貫設有—洩壓孔， 並於該正轉流道中财—可於預定轉動角度對應封閉該 減孔之轉速控制件，以使進人該正轉流道中之高壓氣 體可藉由轉動該轉速控制件控制該域孔之域孔徑大 表單編號A0101 第5頁/共21頁 1002031664-0 201247368 [0013] [0014] [0015] [0016] [0017] 小，以構成可調節該正轉流道進氣流量之轉速可調整狀 態；而當高壓氣體改由氣動工具之逆轉流道進入時，則 可不受位於該正轉流道中之洩壓孔徑大小影響，而固定 保持於最高轉速狀態。 而本發明之上述目的與優點，不難從下述所選用實 施例之詳細說明與附圖中，獲得深入了解。 當然，本發明在某些另件上，或另件之安排上容許 有所不同，但所選用之實施例，則於本說明書中，予以 詳細說明。 【實施方式】 首先，請參閱第1圖〜第3圖，係本發明所提供之 一種氣動工具之轉速控制裝置及其轉速控制方法，其主 要係由一設於氣動工具本體1 1内之殼座2 1、一後蓋 4 1以及一轉速控制件5 1所構成，其中： 該氣動工具本體1 1係具有一容置空間1 2，並於 該氣動工具本體11下部一體延伸有一具備進氣通道1 3 1與排氣通道1 3 2之握把1 3，該進氣通道1 3 1 於握把1 3底部露出一可供連接高壓氣體之連接部1 3 3，而該排氣通道1 3 2則於握把1 3底部形成有複數 個排氣口 1 3 4。 該殼座21，係呈中空筒狀並容設於該氣動工具本 體1 1之容置空間1 2中，該殼座2 1係供容設有一馬 達組件2 2，並於該殼座2 1底部開設有一容置槽2 3 ，且該容置槽2 3内壁一側開設有一連通至該殼座2 1 100118759 表單編號A0101 第6頁/共21頁 1002031664-0 201247368 外。卩之正轉進氧道2 4與一逆轉進氣道2 5，另於該殼 座2 1頂部開設有複數個穿孔2 1 1。 [0018] Ο [0019] Ο 而一開關桿組3 1係穿設於該握把2 3頂部並位於 *亥忒座2 1下方，該開關桿組3 ^末端係具有—可對應 封閉該握把進氣通道i 3 1之控制部3 2，而該開關桿 組3 1露出於該握把i 3之另端則與一扳機3 3相連結 ，藉由扣壓該扳機3 3以可帶動該控制部3 2移動，進 而開啟或封閉該進氣通道i 3 i之高壓氣體進入該殼座 2 1底部之容置槽2 3中，並於該容置槽2 3中更設有 一換向閥2 6，該換向閥2 6係與一推桿2 7相接，並 可受該推桿27帶動以控制該進氣通道13 j中之高壓 氣體是進入該正轉進氣道2 4或進入該逆轉進氣道2 5 中（由於該開關桿組與該換向機構並非本案申請重點， 故於此不再詳述其細部構造）。 該後蓋4 1，係與該殼座2 1之一側開口相互對接 ，於本實施例中，該後蓋4 1與該殼座2 1之間更夾設 有一襯墊4 4，且於該後蓋4 1與該殼座2丄呈相對之 端面上係凹設有一與該殼座2 1正轉進氣道2 4相對位 連通之正轉流道4 2，以及一與該殼座2 1逆轉進氣道 2 5相對位連通之逆轉流道4 3，而當高壓氣體經該正 轉進氣道2 4進入該正轉流道4 2時即可驅動該馬達組 件2 2朝正向轉動，反之，當尚壓氣體是經該逆轉進氣 道2 4進入該逆轉流道4 3時則可驅動該馬達組件2 2 朝逆向轉動。其中，於該正轉流道4 2中更界定形成有 一轉動空間4 2 1，且該轉動空間4 2 i係位於該正轉 100118759 表單編號A0101 第7頁/共21頁 1002031664-0 201247368 流道4 2相對靠近該正轉進氣道24之前端位置處，並 於該轉動空間4 2 1—側貫設有一連通至該後蓋4 1外 部之洩壓孔4 2 2，另該轉動空間4 2 1於相對該正轉 流道4 2之二相對内壁係呈相對凹入之凹弧狀。 [0020] [0021] 該轉速控制件51，係由該氣動工具本體11外部 穿設於該後蓋4 1之轉動空間4 2 1中，並可相對該轉 動空間4 2 1進行轉動，該轉速控制件5 1伸設於該轉 動空間4 2 1之一端係具有一擋部5 2以及一平衡部5 3，且該轉速控制件5 1之擋部5 2與平衡部5 3的外 緣面係呈圓弧狀而可分別與該轉動空間4 2 1之二圓弧 狀内壁相互對應組配，且該擋部5 2係可於該轉速控制 件51相對該轉動空間421轉動至一預定轉動角度時 對應封閉該洩壓孔4 2 2，而該轉速控制件5 1於露出 該氣動工具本體11外部之一端則接設有一可供人手操 控之轉紐5 4，並藉由轉動該轉速控制件5 1之轉紐5 4即可同步帶動其檔部5 2轉動，而隨著該擋部5 2之 轉動角度變化即可改變該擋部5 2與該洩壓孔4 2 2之 相對位置，進而控制該洩壓孔4 2 2之洩壓孔徑大小， 以調節由該正轉進氣道2 4進入該正轉流道4 2之進氣 流量。 而藉由上述結構所組成之本發明於氣動工具進行正 向轉動時之作動狀態，請搭配參閱第3、第4圖，當位 於該進氣通道1 3 1之高壓氣體受該換向閥2 6控制而 經該殼座2 1之正轉進氣道2 4進入於該後蓋4 1之正 轉流道4 2中時，位於該殼座2 1中之馬達組件2 2即 100118759 表單編號A0101 第8頁/共21頁 1002031664-0 201247368 可受該高壓氣體之推動而開始進行正向轉動，此時由於 δ亥轉速控制件5 1之擋部5 2係處於對應封閉該洩壓孔 4 2 2之狀態，因此進入該正轉流道4 2之高壓氣體即 呈可全力推動該馬達組件2 2運轉之最高轉速（扭力） 狀態，而推動馬達組件2 2後之高壓氣體在依序經該後 蓋4 1之逆轉流道4 3、該殼座2 1之穿孔2 1 1部分 排出，而部分氣體再經該逆轉進氣道2 5、該握把丄3 G [0022] 之排氣通道1 3 2後再由其排氣口 i 3 4排出該氣動工 具本體11外部。 Ο 而當欲調整氣動工具之正轉轉速時，使用者僅須藉 由轉動該轉速控制件5 i之轉鈕5 4，並令其擋部5 2 不封閉該洩壓孔4 2 2，此時請搭配參閱第3、第5圖 所示，經該正轉進氣道2 4進入該正轉流道4 2之高壓 氣體將會有部份由該洩壓孔4 2 2洩出（如第5圖虛線 箭頭所示），且經該洩壓孔422洩出之高壓氣體係可 進入該握把1 3之排氣通道1 3 2後再由其排氣口工3 4排出該氣動工具本體i丄外部，並藉此即可調節進入 該正轉流道4 2中用以推動該馬達組件2 2之進氣流量 ，且隨著該播部5 2之轉動角度變化即可改變該擒部5 2與該洩壓孔4 2 2之相對位置，並進而控制該洩壓孔 4 2 2之洩壓孔徑大小，以構成可調節該正轉流道4 2 進氣流量之轉速（扭力）可調整狀態。 反之，當氣動工具於進行逆向轉動時，請搭配參閱 第3、第6圖所示，位於該進氣通道i 3 i之高壓氣體 係受該換向閥2 6控制而經該殼座2 1之逆轉進氣道2 100118759 表單編號A0101 第9頁/共21頁 1002031664-0 [0023] 201247368 5進入於該後蓋4 1之逆轉流道4 3中，此時位於該殼 座2 1中之馬達組件2 2即可受該高壓氣體之推動而開 始進行逆向轉動，而推動該馬達組件2 2後之高壓氣體 在依序經該後蓋4 1之正轉流道4 2、該殼座2 1之穿 孔2 1 1部分排出，而部分氣體再經該正轉進氣道2 4 、該握把1 3之排氣通道1 3 2後再由其排氣口 1 3 4 排出該氣動工具本體1 1外部，且由於該洩壓孔4 2 2 係設於該正轉流道4 2中，因此不論先前正轉調速時該 轉速控制件5 1之擋部5 2處於任何位置，皆能確保其 逆轉時可保持在最大之排氣流量，而該洩壓孔4 2 2於 氣動工具進行逆向轉動時則構成為另一輔助排氣孔，使 氣動工具在進行逆向轉動時固定保持在全力推動該馬達 組件2 2運轉之最高轉速（扭力）狀態，並確保其排氣 之順暢性；並藉此即可使氣動工具在使用上，不論其正 轉之轉速調整狀態為何，當切換至逆轉模式時，其轉速 將固定保持在最大狀態，俾供氣動工具用以旋鬆螺絲時 的速度得以提昇，使操作、工作上更有效率。 [0024] 而本發明之轉速控制裝置係與轉向機構、開關桿組 3 1呈分離型態設置，換言之，本發明之轉速控制裝置 並不是套設於該握把中之開關桿組3 1上，而可使組裝 上更為簡單，並同樣具有可調整氣動工具正轉轉速，而 逆轉時則保持在最大轉速（扭力）之功效。 再者，本發明更藉由將該轉速控制裝置與轉向機構 、開關桿組3 1呈分離型態設置，因此更可有效避免直 接對進、排氣通道造成阻擋，進而使本發明具有可達到 100118759 表單編號A0101 第10頁/共21頁 1002031664-0 [0025] 201247368 預期輸出扭力之功效。 [0026] 惟，以上所述實施例之揭示係用以說明本發明，並 非用以限制本發明，故舉凡數值之變更或等效元件之置 換仍應隸屬本發明之範疇。 [0027] 綜上所述，本發明係已具有相當的進步性及實用性 ，且經以上詳細說明後，係可使熟知本項技藝者明瞭本 發明的確可達成前述目的，實已符合專利法之規定，故 本案發明人爰依法提出申請。 【圖式簡單說明】 [0028] 第1圖係本發明之立體分解示意圖 [0029] 第2圖係本發明組裝後之局部立體剖面示意圖 [0030] 第3圖係本發明組裝後之平面剖視圖 [0031] 第4圖係本發明之使用狀態示意圖，係用以顯示氣動工 具正轉時之最高轉速（扭力）狀態 [0032] 第5圖係本發明之使用狀態示意圖，係用以顯示氣動工 具正轉時之轉速（扭力）可調整狀態 [0033] 第6圖係本發明之另一使用狀態示意圖，係用以顯示氣 動工具逆轉時之狀態 [0034] 第7圖係習用氣動工具調速裝置之結構示意圖 【主要元件符號說明】 [0035] (習用部分） [0036] 旋轉筒7 1 旋鈕7 2 100118759 表單編號A0101 第11頁/共21頁 1002031664-0 201247368 [0037] 穿孔7 3 正轉進氣道7 4 [0038] 逆轉進氣道7 5 換向機構7 6 [0039] 開關閥桿7 7 閥套7 8 [0040] 排氣流道W [0041] (本發明部分） [0042] 氣動工具本體1 1 容置空間1 2 [0043] 握把1 3 進氣通道131 [0044] 排氣通道1 3 2 連接部1 3 3 [0045] 排氣口 1 3 4 殼座2 1 [0046] 穿孔2 1 1 馬達組件2 2 [0047] 容置槽2 3 正轉進氣道2 4 [0048] 逆轉進氣道2 5 換向閥2 6 [0049] 推桿2 7 開關桿組3 1 [0050] 控制部3 2 扳機3 3 [0051] 後蓋4 1 正轉流道4 2 [0052] 轉動空間4 2 1 洩壓孔4 2 2 [0053] 逆轉流道4 3 襯墊4 4 [0054] 轉速控制件5 1 擋部5 2 [0055] 平衡部5 3 轉鈕5 4 100118759 表單編號A0101 第12頁/共21頁[0012] 100118759 reversing the intake port; - the rear sill is connected to one side of the housing, the rear cover has a forward flow path opposite to the forward rotation inlet, and - and the reverse intake a reverse flow path of the opposite position of the track, wherein a rotating two space is formed in the forward rotating flow path, and a pressure releasing hole connected to the outside of the rear cover is disposed on one side of the rotating space; the control part is one end The rotation speed control member is disposed outside the body of the k-shaped body, and the speed control member is provided with a button at one end of the body of the pneumatic tool body and is rotated by rotating the button The rotation speed control member can be synchronously driven to rotate relative to the rotation space. The end of the rotation speed control member extending from the rotation space has a blocking portion and a balance portion, and the rotation space is opposite to the forward rotation flow path. The inner wall is oppositely concave and arcuate, and the outer surface of the speed control member and the outer edge of the balance portion are arc-shaped and can be respectively combined with the two IU arcs (four) of the rotating space, and The push county can rotate the rotation control member relative to the rotation When the space is rotated to a predetermined rotation angle, the slit hole is closed correspondingly, and the relative position of the blocking portion and the pressure pressing hole can be changed according to the change of the rotation angle of the collision portion, thereby controlling the slit diameter of the bubble pressing hole, To regulate the intake air flow from the forward rotation passage: into the forward rotation flow passage. Furthermore, the present invention further provides a method for controlling the speed of a pneumatic visor, which is constructed by using a pressure relief hole in a forward flow path of a pneumatic tool, and at a predetermined rotation angle in the forward flow path. Corresponding to the rotation speed control member for closing the reduction hole, so that the high pressure gas entering the forward rotation flow passage can control the domain aperture of the domain hole by rotating the rotation speed control member. Form No. A0101 Page 5 / 21 pages 1002031664- [0013] [0016] [0017] [0017] [0017] [0017] [0017] [0017] small to form an adjustable speed state that can adjust the intake air flow rate of the forward flow passage; and when the high pressure gas is changed by the reverse flow path of the pneumatic tool When it is not affected by the size of the pressure relief aperture located in the forward flow passage, it is fixedly maintained at the maximum speed state. The above objects and advantages of the present invention will be readily understood from the following detailed description of the embodiments of the invention. Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in this specification. [Embodiment] First, please refer to FIG. 1 to FIG. 3 , which is a rotation speed control device for a pneumatic tool and a rotation speed control method thereof, which are mainly provided by a shell disposed in a pneumatic tool body 1 1 . The seat 2 1 , a rear cover 4 1 , and a rotational speed control member 51 , wherein: the pneumatic tool body 11 has an accommodating space 12 , and an air intake is integrally formed at a lower portion of the pneumatic tool body 11 . a passage 1 3 1 and a grip 13 of the exhaust passage 1 3 2 , the intake passage 1 3 1 exposing a bottom portion of the grip 13 to a connection portion 1 3 3 for connecting a high-pressure gas, and the exhaust passage 1 3 2, a plurality of exhaust ports 1 3 4 are formed at the bottom of the grip 13 . The housing 21 has a hollow cylindrical shape and is received in the accommodating space 1 2 of the pneumatic tool body 1 1 . The housing 2 1 is provided with a motor assembly 2 2 , and the housing 2 1 A receiving slot 2 3 is defined in the bottom, and a side of the inner wall of the receiving slot 2 3 is connected to the housing 2 1 100118759 Form No. A0101 Page 6 / 21 pages 1002031664-0 201247368. The cockroach is turned into the oxygen channel 24 and the reverse inlet port 2 5 , and a plurality of perforations 2 1 1 are opened at the top of the shell 2 1 . [0018] 开关 [0019] 开关 a switch lever set 31 is threaded on the top of the grip 2 3 and located under the * 忒 2 2, the switch rod set 3 ^ end has - can correspondingly close the grip The control unit 3 2 of the intake passage i 3 1 is exposed, and the switch lever set 31 is exposed at the other end of the grip i 3 to be coupled to a trigger 3 3 , which can be driven by pressing the trigger 3 3 The control unit 32 moves, and the high-pressure gas that opens or closes the intake passage i 3 i enters the accommodating groove 23 at the bottom of the housing 2 1 , and further includes a reversing valve in the accommodating groove 23 2, the reversing valve 26 is connected to a push rod 27, and can be driven by the push rod 27 to control the high pressure gas in the intake passage 13j to enter the forward air inlet 24 or Entering the reverse intake port 2 5 (since the switch lever group and the reversing mechanism are not the focus of the present application, the detailed configuration thereof will not be described in detail herein). The back cover 411 is abutting against the side opening of the housing 2 1 . In the embodiment, a spacer 4 4 is further interposed between the rear cover 4 1 and the housing 2 1 , and The rear cover 41 is recessed on the opposite end surface of the housing base 2, and a forward rotation flow passage 42 is provided, which is opposite to the forward rotation air inlet 24 of the housing base 2, and a housing 2 1 reverses the inlet passage 2 5 and reverses the flow passage 43 to the opposite position, and when the high pressure gas enters the forward rotation passage 4 through the forward rotation inlet 24, the motor assembly 2 2 is driven toward the positive The rotation is reversed. Conversely, when the still-pressed gas enters the reverse flow path 43 via the reverse intake port 24, the motor assembly 2 2 can be driven to rotate in the reverse direction. Wherein, a rotating space 4 2 1 is further defined in the forward rotating passage 4 2 and the rotating space 4 2 i is located in the forward rotation 100118759 Form No. A0101 Page 7 / Total 21 Page 1002031664-0 201247368 Flow path 4 2 is relatively close to the front end position of the forward rotation air inlet 24, and a pressure relief hole 4 2 2 communicating to the outside of the rear cover 4 1 is disposed laterally in the rotation space 4 2 1 , and the rotation space is further 4 2 1 is oppositely concave and concave with respect to the inner wall of the forward flow channel 42 2 . [0021] The rotational speed control member 51 is externally disposed in the rotating space 42 of the rear cover 4 1 and can be rotated relative to the rotating space 4 2 1 . The control member 5 extends from one end of the rotating space 4 2 1 to have a stop portion 5 2 and a balance portion 53 , and the stop portion 52 of the rotational speed control member 51 and the outer peripheral surface of the balance portion 53 The arc-shaped arcs are respectively associated with the two arc-shaped inner walls of the rotating space 4 2 1 , and the blocking portion 52 is rotatable relative to the rotating space 421 to a predetermined rotation. When the angle is closed, the pressure release hole 42 2 is closed, and the rotation speed control member 51 is connected to one end of the air tool body 11 to be connected with a hand-operated switch 54 and controlled by rotating the rotation speed. The turn 5 4 of the piece 5 1 can synchronously drive the rotation of the gear portion 5 2 , and the relative position of the stop portion 5 2 and the pressure release hole 4 2 2 can be changed as the rotation angle of the stop portion 5 2 changes. And controlling the pressure relief aperture of the pressure relief hole 42 2 to adjust the intake air entering the forward rotation flow path 4 2 by the forward rotation air inlet 24 flow. When the present invention consisting of the above structure is used for the forward rotation of the pneumatic tool during forward rotation, please refer to FIGS. 3 and 4, when the high pressure gas located in the intake passage 13 is subjected to the reversing valve 2 When the control is passed through the forward rotation port 24 of the housing 2 1 into the forward flow path 4 2 of the rear cover 4 1 , the motor assembly 2 2 located in the housing 2 1 is 100118759. A0101 Page 8 of 21 1002031664-0 201247368 The forward rotation can be started by the push of the high pressure gas. At this time, the stop portion 52 of the δ Hz rotational speed control member 51 is correspondingly closed to the pressure relief hole 4 In the state of 2 2, the high-pressure gas entering the positive-rotating flow path 4 2 is in a state of being able to push the motor unit 22 to the maximum rotational speed (torque) state, and the high-pressure gas after the motor assembly 2 2 is sequentially passed. The reverse flow passage 4 3 of the rear cover 4 1 and the perforation 2 1 1 of the housing seat 2 1 are partially discharged, and a part of the gas passes through the reverse intake port 25 and the exhaust of the grip 丄 3 G [0022] After the passage 1 3 2 is discharged from the outside of the pneumatic tool body 11 by its exhaust port i 3 4 . Ο When the forward rotation speed of the pneumatic tool is to be adjusted, the user only has to turn the rotary knob 5 4 of the rotational speed control member 5 i and the blocking portion 5 2 does not close the pressure relief hole 4 2 2 . At this time, please refer to the third and fifth figures. The high-pressure gas entering the forward flow path 4 through the forward-running port 24 will be partially discharged from the pressure-relieving hole 42 2 ( As shown by the dashed arrow in Fig. 5, the high pressure gas system discharged through the pressure relief hole 422 can enter the exhaust passage 1 3 2 of the grip 13 and then be discharged by the exhaust port 3 4 . The tool body is externally located, and thereby the inlet air flow into the forward flow channel 42 can be adjusted to push the intake air flow of the motor assembly 22, and can be changed as the rotation angle of the broadcast portion 52 changes. The position of the dam portion 5 2 and the pressure relief hole 42 2 2, and further the size of the pressure relief aperture of the pressure relief hole 42 2 to form a rotation speed (torque force) that can adjust the intake air flow rate of the forward flow channel 4 2 ) Adjustable status. Conversely, when the pneumatic tool is rotated in the reverse direction, please refer to the third and sixth figures. The high-pressure gas system located in the intake passage i 3 i is controlled by the reversing valve 26 and passes through the housing 2 1 . Reversing the intake port 2 100118759 Form No. A0101 Page 9 of 21 page 1002031664-0 [0023] 201247368 5 enters the reverse flow path 4 3 of the rear cover 4 1 , at this time in the housing 2 1 The motor assembly 22 can be reversely rotated by the high-pressure gas, and the high-pressure gas that pushes the motor assembly 22 is sequentially passed through the forward flow passage 4 of the rear cover 4 1. The housing 2 The perforation 2 1 1 portion is discharged, and a part of the gas passes through the forward rotation port 2 4 , the exhaust passage 1 3 2 of the grip 13 , and then the exhaust tool 1 3 4 is discharged from the pneumatic tool body. 1 1 is external, and since the pressure relief hole 4 2 2 is disposed in the forward flow passage 4 2 , it can be ensured that the position of the rotation speed control member 51 is in any position regardless of the previous forward rotation speed regulation. When it is reversed, it can maintain the maximum exhaust flow rate, and the pressure relief hole 42 2 is formed as another auxiliary row when the pneumatic tool performs reverse rotation. The hole enables the pneumatic tool to be fixedly held at the highest rotational speed (torque) state of the motor assembly 2 2 during the reverse rotation, and to ensure the smoothness of the exhaust gas; thereby, the pneumatic tool can be used. Regardless of the speed adjustment state of the forward rotation, when switching to the reverse mode, the rotation speed will be fixed at the maximum state, and the speed for the pneumatic tool to loosen the screw can be improved, which makes the operation and work more efficient. [0024] The rotation speed control device of the present invention is disposed in a separate state from the steering mechanism and the switch lever group 31. In other words, the rotation speed control device of the present invention is not disposed on the switch lever group 31 in the grip. This makes assembly easier, and also has the ability to adjust the forward rotation speed of the pneumatic tool and maintain the maximum rotation speed (torque) when reversing. Furthermore, the present invention further provides the separation of the rotational speed control device and the steering mechanism and the switch lever group 31, thereby effectively preventing direct blocking of the intake and exhaust passages, thereby making the present invention achievable. 100118759 Form No. A0101 Page 10 of 21 1002031664-0 [0025] 201247368 The effect of expected output torque. The disclosure of the above-described embodiments is intended to be illustrative of the present invention and is not intended to limit the scope of the invention. [0027] In summary, the present invention has been made with considerable progress and practicality, and after the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objects and is in accordance with the patent law. The provisions of the case, the inventor of this case filed an application in accordance with the law. BRIEF DESCRIPTION OF THE DRAWINGS [0028] Fig. 1 is a perspective exploded view of the present invention [0029] Fig. 2 is a partial perspective sectional view of the present invention after assembly [0030] Fig. 3 is a plan sectional view of the assembled body of the present invention [ Fig. 4 is a schematic view showing the state of use of the present invention for displaying the state of maximum rotational speed (torque) when the pneumatic tool is rotated forward. [0032] Fig. 5 is a schematic view showing the state of use of the present invention, which is used to display the pneumatic tool Rotating speed (torque) adjustable state [0033] Fig. 6 is a schematic view showing another state of use of the present invention for displaying the state of the pneumatic tool when it is reversed [0034] Fig. 7 is a conventional pneumatic tool speed adjusting device Schematic diagram of the main components [Description of main components] [0035] (customized part) [0036] Rotating cylinder 7 1 Knob 7 2 100118759 Form No. A0101 Page 11 of 21 1002031664-0 201247368 [0037] Perforation 7 3 Forward air intake Road 7 4 [0038] Reverse Intake Port 7 5 Reversing Mechanism 7 6 [0039] Switching Valve Rod 7 7 Valve Cover 7 8 [0040] Exhaust Flow Channel W [0041] (Part of the Invention) [0042] Pneumatic Tool Body 1 1 accommodation space 1 2 [0043] grip 1 3 Intake passage 131 [0044] Exhaust passage 1 3 2 Connection 1 3 3 [0045] Exhaust port 1 3 4 Housing 2 1 [0046] Perforation 2 1 1 Motor assembly 2 2 [0047] Slot 2 3 Forward rotation port 2 4 [0048] Reverse intake port 2 5 Directional valve 2 6 [0049] Push rod 2 7 Switch rod set 3 1 [0050] Control unit 3 2 Trigger 3 3 [0051] Cover 4 1 Positive flow path 4 2 [0052] Rotation space 4 2 1 Pressure relief hole 4 2 2 [0053] Reverse flow path 4 3 Pad 4 4 [0054] Speed control member 5 1 Stop 5 2 [0055] Balance 5 3 Button 5 4 100118759 Form No. A0101 Page 12 of 21
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