1314498 九、發明說明： 【發明所屬之技術領域】 本發明與轉動工具有關’特別是有關於一種用於轉動 工具之傳動機構。 5【先前技術】 傳統的轉動工具(如氣動扳手）主要包含有—殼體，殼體 内裝設有-轉子、-擊鎚籠、-設於擊鍵籠内之轴石占與二 分別套設於軸砧之鎚體。當壓縮空氣進入殼體内，將^帶 動轉子轉動，轉子會再帶動擊|迨籠旋轉，並且藉由擊鍵^ 10依序帶動二鍵體與軸石占轉動，二鍵體隨即循環地施以鍵擊 動作於軸砧，使軸砧提供出扭力及衝擊力於一工具頭，工 具頭即可進行旋鬆或旋緊螺栓、螺帽的工作。 、 然而，當利用轉動工具進行上述工作時，由於工具頭 b會受到較大的衝擊反力’反力將透過工具頭傳遞至轴ς及 轉子，容易使軸砧與轉子的連接處產生應力集中現象，因 轉動工具在長期使用下，軸石占與轉子的結構都將受到 應力7Κ中現象之影響而無法確實地連接，導致轉子在帶動 轴石占轉動日守會發生振動情形，甚至造成轴石占與轉子從連接 處產生斷裂損壞。 20 【發明内容】 ^本發明之主要目的在於提供一種用於轉動工具之傳動 機構、’其可減少應力集中現象，用以避免構件發生損壞。 為達成上述目的，本發明所提供用於轉動工具之傳動 1314498 4、構包含有-驅動裝置、一衝擊組與一支撐件。該 置具有雜—設於該固^座之轉動件，動裝 座具有-承接部；該衝擊組具有—擊鍵籠、至^=定 -軸站’該擊鍵蘢具有一連動部，該軸站穿置於=與 =Γ套設於該軸站’該驅動裝置之轉動件係連^： 座之承接部與該擊鎚籠之連動部間。 又於邊固定 ^本發明—較佳實施财，該支撐件為—軸承， π =縣鍵龍之連動部，使姉承之關抵接該連動 邛，该軸承之外周抵接該承接部。 八拖藉此’當雜動件軸擊轉動時，該支樓件會 轉動件與該_相連接處所產生的應力，減少該轉 wir亥轴石占的連接處因振動所發生之應力集中現象，避 免該轉動工具出現損壞的狀況。 15 【實施方式】 ，配合®式列細下較佳實施例，針對本發明之結構 ^行詳細說明；其中所關式先簡要說明如下： 圖為本發明一較佳實施例之立體分解圖；以及 2〇 ί二圖為本發明一較佳實施例之剖視圖。 日用先參閱第一及第二圖所示，為本發明一較佳實施例 所=供之轉動工具⑽，轉動卫具⑽在本實施例中為氣動 5其包含有一殼體(12),殼體(12)具有一進氣道(14)與 J C(16)巧再參閱第二圖，為本發明一較佳實施例所 1314498 提供用於轉動工具(ίο)之傳動機構⑽，傳動機構(2〇)包含 有一驅動裝置(30)、一衝擊組(4〇)與一支撐件(5〇)。 驅動裝置(30)裝設於殼體(12)内。驅動裝置(3〇)包含有 -固定座(32)與-轉動件(34)，其中固定座(32)為一氣缸， 5氣缸具有一分別連通進氣道（14)與出氣道（16)之氣室 (322)，且氣缸的前側面向外延伸出一環狀之承接部(324)， 而轉動件(34)為一轉子，轉子裝設於氣室(322)中，且具有 一分別向如後兩端延伸而出之轉軸（342)與複數葉片 (344)，其中轉軸(342)的外周面具有複數齒條(346)。另外， 1〇驅動裝置(30)於轉軸(342)的前後兩端分別裝設有一軸承 (36，38)，用以使轉動件(34)可於固定座(32)内旋轉。 衝擊組(40)裝設於殼體（12)内，且位於固定座（32)前 方。衝擊組(40)包含有一擊鍵籠(42)、一軸砧(44)與二鎚體 (46)。擊鍵籠(42)具有一貫穿前後兩侧面之貫孔(422)，且擊 i5鎚籠(42)的後側面於貫孔(422)之周緣向外延伸出一連動部 (424) ’連動部(424)伸入氣缸之承接部(324)中，且連動部 (424)的内周面具有複數齒槽(426)，用以供轉軸(342)之齒條 (346)唾合’使轉軸(342)可帶動擊鎚籠(42)轉動。軸站(44) 具有一軸身(442)與二固設於軸身(442)之顎塊(444)，其中軸 2〇身(442)穿過擊鎚籠(42)之貫孔(422)，且軸身(442)的前後兩 端分別與一工具頭及轉子之轉軸(342)連接，使轉軸(342)可 帶動軸站(44)轉動。各鎚體(46)同軸地套設於軸砧(44)，並 位於擊鍵籠(42)中。各鎚體(46)的内側面抵接於顎塊(444)。 支撐件(50)為一軸承。支撐件(50)套設於擊鎚籠(42)之 6 1314498 連動部(424)，且支撐件(50)之内周面與外周面分別抵接連 動部(424)之外周面與承接部(324)之内周面。 1二由上述結構，當壓縮空氣從殼體(12)之進氣道(μ)進 入氣缸之氣室(322)後，會驅動葉片（344)轉動，使葉片（344) W動轉動件(34)與二軸承(36，38)轉動，在轉動件(34)旋轉 日寸轉動件(34)之轉軸(342)會再同步帶動衝擊組(4〇)與支樓 件(50)轉動，此時，二鎚體(46)會同時施以鎚擊動作於軸砧 (44)之二顎塊(444) ’使軸砧(44)可提供足夠的扭力及衝擊力 於工具頭，讓工具頭進行旋鬆或旋緊螺栓之工作。若工具 1〇頭於進行上述工作時受到較大的衝擊反力，反力會透過轴 占(44)轉$鍵巍(42)傳遞至轉軸(342)，而由於支撐件(5〇)的 内周面抵接於連動部(424)之外周面，使支撐件(5〇)可分擔 軸砧(44)與擊鎚籠(42)所傳遞來的反力，用以分散轉軸(342) 所又到的衝擊力量，如此一來，轉軸(342)與軸砧(44)的連 15接處可減少產生應力集中現象而避免結構損壞。 藉此，本發明透過支撐件的作用，可增加轉軸的受力 面積，使支撐件分擔轉軸所受到的衝擊力量，用以減少產 生應力集中現象，進而達到避免結構損壞的目的。 本發明除了應用於上述之氣動工具以外，亦可應用具 2〇有:轉動之轉子的電動工具；同時，支撐件不一定要設於 □疋座之承接部，支撐件只要介於衝擊組之擊鍵籠與固定 座之間即可達到本發明的發明目的。 7 1314498 【圖式簡單說明】 第一圖為本發明一較佳實施例之立體分解圖。 第二圖為本發明一較佳實施例之剖視圖。 5【主要元件符號說明】1314498 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a rotary tool, and particularly relates to a transmission mechanism for a rotary tool. 5 [Prior Art] Traditional turning tools (such as pneumatic wrenches) mainly include a - housing, which is equipped with a rotor, a hammer cage, and a shaft set in the keystroke cage. Set on the hammer of the anvil. When the compressed air enters the housing, the rotor will be rotated, and the rotor will rotate the hammer and the cage will rotate, and the two keys and the shaft will be rotated by the keystrokes, and the two keys will be cyclically applied. The action is performed on the shaft anvil, so that the shaft provides torque and impact force on a tool head, and the tool head can perform the work of loosening or tightening the bolt and the nut. However, when the above work is performed by using the rotary tool, since the tool head b is subjected to a large impact reaction force, the reaction force will be transmitted to the shaft shaft and the rotor through the tool head, which easily causes stress concentration at the joint between the anvil and the rotor. Phenomenon, due to the long-term use of the rotating tool, the structure of the shaft and the rotor will be affected by the phenomenon of stress 7Κ and can not be reliably connected, resulting in the vibration of the rotor in the rotation of the shaft and the rotation of the shaft, even causing the shaft The stone accounts with the rotor to cause breakage damage from the joint. [Explanation] The main object of the present invention is to provide a transmission mechanism for rotating a tool, which can reduce stress concentration to avoid damage to components. In order to achieve the above object, the present invention provides a transmission for a rotary tool 1314498 4 which comprises a drive unit, an impact set and a support member. The rotating member provided with the fixing seat has a receiving portion; the impact group has a keystroke cage, and the locking button has a linkage portion, and the keystroke has a linkage portion, The shaft station is placed between the bearing portion of the shaft and the connecting portion of the rotating device of the driving device to the shaft station. Further, the present invention is preferably implemented. The support member is a bearing, and the π = the interlocking portion of the county key dragon, so that the bearing is abutted against the interlocking mechanism, and the bearing abuts the receiving portion. The eight-drag can be used to reduce the stress generated by the vibration of the joint at the joint of the wir-axis. To avoid damage to the rotating tool. [Embodiment] The structure of the present invention will be described in detail with reference to the preferred embodiment of the present invention. The following is a brief description of the following: FIG. 3 is an exploded perspective view of a preferred embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2 is a cross-sectional view of a preferred embodiment of the present invention. Referring to the first and second figures for daily use, in accordance with a preferred embodiment of the present invention, a rotary tool (10) is provided. In this embodiment, the rotary guard (10) includes a housing (12). The housing (12) has an air inlet (14) and a JC (16). Referring to the second figure, a driving mechanism (10) for rotating the tool (10) is provided for a preferred embodiment of the present invention. (2〇) includes a driving device (30), an impact group (4〇) and a support member (5〇). The driving device (30) is mounted in the housing (12). The driving device (3〇) comprises a fixing base (32) and a rotating member (34), wherein the fixing seat (32) is a cylinder, and the 5 cylinders have a connecting air inlet (14) and an air outlet (16) respectively. The air chamber (322), and the front side of the cylinder extends outwardly to form an annular receiving portion (324), and the rotating member (34) is a rotor, and the rotor is disposed in the air chamber (322) and has a A rotating shaft (342) and a plurality of blades (344) extending from the rear ends, respectively, wherein the outer peripheral surface of the rotating shaft (342) has a plurality of racks (346). In addition, a driving device (30) is respectively provided with a bearing (36, 38) on the front and rear ends of the rotating shaft (342) for rotating the rotating member (34) in the fixing seat (32). The impact set (40) is mounted within the housing (12) and is located in front of the mount (32). The impact set (40) includes a keying cage (42), an anvil (44) and a second hammer (46). The keystroke cage (42) has a through hole (422) extending through the front and rear sides, and the rear side of the hammering arm (42) of the hammer i5 extends outwardly from the periphery of the through hole (422) by a linkage portion (424). The portion (424) extends into the receiving portion (324) of the cylinder, and the inner peripheral surface of the linking portion (424) has a plurality of slots (426) for the rack (346) of the rotating shaft (342) to be sprinkled. The rotating shaft (342) can drive the hammer cage (42) to rotate. The shaft station (44) has a shaft body (442) and two jaws (444) fixed to the shaft body (442), wherein the shaft body 2 (442) passes through the through hole (422) of the hammer cage (42). And the front and rear ends of the shaft body (442) are respectively connected with a tool head and a rotating shaft (342) of the rotor, so that the rotating shaft (342) can drive the shaft station (44) to rotate. Each of the hammer bodies (46) is coaxially sleeved on the anvil (44) and located in the keying cage (42). The inner side surface of each of the hammer bodies (46) abuts against the block (444). The support member (50) is a bearing. The support member (50) is sleeved on the 6 1314498 linkage portion (424) of the hammer cage (42), and the inner circumferential surface and the outer circumferential surface of the support member (50) respectively abut the outer circumferential surface and the receiving portion of the linkage portion (424). The inner surface of (324). According to the above structure, when the compressed air enters the air chamber (322) of the cylinder from the intake passage (μ) of the casing (12), the vane (344) is driven to rotate, so that the vane (344) moves the rotating member ( 34) rotating with the two bearings (36, 38), the rotating shaft (342) of the rotating member (34) rotating the rotating member (34) will synchronously drive the impact group (4〇) and the branch member (50) to rotate, At this time, the two hammers (46) will simultaneously apply a hammering action to the two blocks (444) of the anvil (44). 'The axe (44) can provide sufficient torque and impact force on the tool head, allowing the tool The head is used to loosen or tighten the bolts. If the tool 1 is subjected to a large impact reaction force during the above work, the reaction force is transmitted to the rotating shaft (342) through the shaft (44) and the key 巍 (42), and due to the support (5 〇) The inner peripheral surface abuts against the outer peripheral surface of the linking portion (424), so that the supporting member (5〇) can share the reaction force transmitted from the anvil (44) and the hammer cage (42) for dispersing the rotating shaft (342) The impact force that has arrived is such that the connection between the shaft (342) and the anvil (44) reduces stress concentration and avoids structural damage. Thereby, the present invention can increase the force receiving area of the rotating shaft through the action of the supporting member, so that the supporting member can share the impact force received by the rotating shaft, thereby reducing the stress concentration phenomenon and thereby avoiding structural damage. In addition to the above-mentioned pneumatic tools, the present invention can also be applied to a power tool having a rotor that rotates. At the same time, the support member does not have to be disposed at the receiving portion of the squat seat, and the support member is only required to be in the impact group. The object of the invention is achieved between the keystroke cage and the mount. 7 1314498 BRIEF DESCRIPTION OF THE DRAWINGS The first figure is an exploded perspective view of a preferred embodiment of the present invention. The second figure is a cross-sectional view of a preferred embodiment of the present invention. 5 [Main component symbol description]
10 1510 15
轉動工具(10) 進氣道(14) 傳動機構(20) 固定座(32) 承接部(324) 轉軸(342) 齒條(346) 衝擊組(40) 貫孔(422) 齒槽(426) 軸身(442) 鎚體(46) 殼體(12) 出氣道(16) 驅動裝置(30) 氣室(322) 轉動件(34) 葉片（344) 軸承(36，38) 擊鍵籠(42) 連動部(424) 軸砧(44) 顎塊(444) 支撐件(50) 8Rotary tool (10) Intake (14) Transmission (20) Mounting (32) Receiving part (324) Shaft (342) Rack (346) Impact set (40) Through hole (422) Groove (426) Shaft body (442) Hammer body (46) Housing (12) Air outlet (16) Drive unit (30) Air chamber (322) Rotating member (34) Blade (344) Bearing (36, 38) Keying cage (42 ) Linkage (424) Axe (44) Block (444) Support (50) 8