TWM627122U - Pneumatic impact tool with vibration damping structure - Google Patents
Pneumatic impact tool with vibration damping structureInfo
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- TWM627122U TWM627122U TW111201216U TW111201216U TWM627122U TW M627122 U TWM627122 U TW M627122U TW 111201216 U TW111201216 U TW 111201216U TW 111201216 U TW111201216 U TW 111201216U TW M627122 U TWM627122 U TW M627122U
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Abstract
一種具有減振結構之氣動衝擊工具,包括有一握柄,內部設有一筒件及一氣流換向閥。筒件連接一內管件,其包括有一環牆及一腔室,一鎚體設於腔室中而區隔為前、後腔室,環牆設有至少一個排氣孔,氣流換向閥可切換氣流輸入前、後腔室。鎚體之外周面設有一排氣通道,其連通前腔室且不連通後腔室。當高壓氣體輸入前腔室時,鎚體被往後推動,高壓氣體經排氣通道及排氣孔而洩出,進而降低鎚體被推動的力量。The utility model relates to a pneumatic impact tool with a vibration damping structure, which comprises a handle, a cylindrical part and an air flow reversing valve inside. The cylinder piece is connected with an inner pipe piece, which includes a ring wall and a chamber, a hammer body is arranged in the chamber and is divided into front and rear chambers, the ring wall is provided with at least one exhaust hole, and the air flow reversing valve can Switch airflow input to front and rear chambers. The outer peripheral surface of the hammer body is provided with an exhaust passage, which communicates with the front chamber and does not communicate with the rear chamber. When the high-pressure gas is input into the front chamber, the hammer body is pushed backward, and the high-pressure gas is discharged through the exhaust passage and the exhaust hole, thereby reducing the force of the hammer body to be pushed.
Description
本創作與手工具有關,尤指一種氣動衝擊工具。This creation relates to hand tools, especially a pneumatic impact tool.
氣動衝擊工具在使用的過程中會因鎚體的往復位移而形成振動,長時間使用下對使用者握持的手掌有不良的影響,尤其擊打力道愈強大的氣動衝擊工具,其所造成的振動也愈大,對使用者造成的傷害也愈大,故必須加以改良。Pneumatic impact tools will vibrate due to the reciprocating displacement of the hammer body during use, which will have adverse effects on the palm of the user when used for a long time. The greater the vibration, the greater the damage to the user, so it must be improved.
我國發明專利公告I235700號、I729809號分別揭露一種氣動工具,其槍管的結構之中,在後方設置有一氣室,俾供鎚體向後移動時擠壓氣室內的空氣,藉以產生緩衝作用,並降低鎚體對槍管所造成的振動。I729809號第4圖又揭露另一種氣動工具,其槍管後方設置有一彈簧或一橡膠塊,俾供鎚體向後移動時推擠彈簧或橡膠塊,藉由其變形以產生緩衝作用,並降低鎚體對槍管所造成的振動。my country's Invention Patent Announcements No. I235700 and No. I729809 respectively disclose a pneumatic tool. In the structure of the barrel, an air chamber is arranged at the rear, so as to squeeze the air in the air chamber when the hammer body moves backward, so as to produce a buffer effect, and Reduce the vibration caused by the hammer body to the barrel. Figure 4 of I729809 discloses another pneumatic tool. There is a spring or a rubber block behind the barrel to push the spring or rubber block when the hammer body moves backwards, and it deforms to produce a buffer effect and lower the hammer. Vibration caused by the body to the barrel.
上述兩個習知結構都是在氣動工具的既有結構之外再另外附加其他構件(改變空間配置形成氣室、增設彈簧或橡膠塊等),在氣動工具產生大幅的振動後再藉由緩衝而減低該振動,除了成本增加的缺點之外,最重要的是減振效果未盡理想,使用者在操作上仍會感到手部不適。The above two conventional structures both add other components to the existing structure of the pneumatic tool (changing the space configuration to form an air chamber, adding a spring or a rubber block, etc.), and after the pneumatic tool generates a large amount of vibration, it is buffered. To reduce the vibration, in addition to the disadvantage of increased cost, the most important thing is that the vibration reduction effect is not ideal, and the user still feels uncomfortable in the operation.
上述I235700號專利之第5圖所揭示的結構中,其設有一連通至槍管前端之進氣管,用以將已移動到槍管前端的鎚體再透過高壓氣體令其往後移動,而槍管上約中間位置處設有一排氣孔以供洩壓。然而鎚體在往前撞擊工具頭而往後回彈的過程中,必須在鎚體通過該中間位置的排氣孔之後才能使槍管內的高壓氣體洩出,惟氣體在洩出之前便已經以高壓驅動鎚體後退到槍管後端,從而以較大的力量撞擊槍管後端,這就是造成氣動工具振動的根本原因。In the structure disclosed in Fig. 5 of the above-mentioned I235700 patent, it is provided with an air intake pipe connected to the front end of the barrel, so as to move the hammer body that has moved to the front end of the barrel through high-pressure gas to move it backward, And about the middle of the barrel is provided with an exhaust hole for pressure relief. However, when the hammer body hits the tool head forward and rebounds back, the high-pressure gas in the barrel must be released after the hammer body passes through the exhaust hole in the middle position, but the gas has been discharged before it is released. The hammer body is driven back to the rear end of the barrel with high pressure, so as to hit the rear end of the barrel with a large force, which is the fundamental cause of the vibration of the pneumatic tool.
有鑑於此,如何改進上述問題即為本創作所欲解決之首要課題。In view of this, how to improve the above problem is the primary issue that this creation intends to solve.
本創作之主要目的在於提供一種具有減振結構之氣動衝擊工具,其在鎚體上設置連通內管件前腔室之排氣通道,而在鎚體後退過程之初即持續洩氣,藉此直接削弱鎚體後退的撞擊力量,進而減少振動。本創作據此在不增加額外構件之前提下產生減振之功效。The main purpose of this creation is to provide a pneumatic impact tool with a vibration-damping structure. The hammer body is provided with an exhaust channel that communicates with the front chamber of the inner pipe, and the air is continuously deflated at the beginning of the hammer body's retreat process, thereby directly weakening the The impact force of the hammer body back, thereby reducing vibration. Accordingly, the present invention produces the effect of vibration reduction without adding additional components.
為達前述之目的,本創作提供一種具有減振結構之氣動衝擊工具,其包括有: 一握柄,其內部設有一凹室,該握柄設有一連接該凹室之進氣通道,其中該進氣通道中設有一氣流開關; 一容置於該凹室中之筒件,該筒件中設有一氣流換向閥,該筒件之一側壁設有一與該進氣通道連通之通孔,使高壓氣體導入該氣流換向閥; 一內管件,其包括有一固定於該筒件之環牆及一由該環牆所包圍之腔室,一密接於該環牆之鎚體設於該腔室中而使該腔室被區隔為一前腔室及一後腔室,該環牆之前端設有一工具頭,該環牆設有至少一個令該腔室連通至外界之排氣孔,該環牆之內部設有一連通該氣流換向閥與該前腔室之氣流通道,該氣流通道在該前腔室形成一第一進氣口,該後腔室設有一連接該氣流換向閥之第二進氣口,該氣流換向閥可切換氣流擇一地自該第一進氣口輸入該前腔室,或自該第二進氣口輸入該後腔室; 上述該鎚體具有一靠近該第一進氣口之頭端及一靠近該第二進氣口之尾端,該鎚體之外周面上設有一排氣通道,其中該排氣通道延伸至該頭端且連通該前腔室,且該排氣通道不連接該尾端,進而不連通該後腔室,當高壓氣體自該第二進氣口注入該後腔室時,該鎚體被高壓氣體推動而朝該工具頭移動;當高壓氣體自該第一進氣口注入該前腔室時,該鎚體被高壓氣體推動而遠離該工具頭,在此過程中,當該鎚體之排氣通道連通該排氣孔時,該前腔室中的高壓氣體經該排氣通道及該排氣孔而洩出,進而降低該鎚體被推動的力量。 In order to achieve the aforementioned purpose, the present invention provides a pneumatic impact tool with a vibration damping structure, which includes: a handle, which is provided with an alcove inside, the handle is provided with an air inlet channel connected to the alcove, wherein an air flow switch is arranged in the air inlet channel; A cylindrical piece accommodated in the recessed cavity, the cylindrical piece is provided with an air flow reversing valve, and a side wall of the cylindrical piece is provided with a through hole communicating with the air inlet passage, so that the high-pressure gas can be introduced into the air flow reversing valve ; An inner pipe includes a ring wall fixed on the cylinder and a chamber surrounded by the ring wall, and a hammer body closely connected to the ring wall is arranged in the chamber so that the chamber is partitioned It is a front chamber and a rear chamber. The front end of the ring wall is provided with a tool head. The airflow reversing valve and the airflow channel of the front chamber, the airflow channel forms a first air inlet in the front chamber, the rear chamber is provided with a second air inlet connected to the airflow reversing valve, the airflow The reversing valve can switch the air flow to be alternatively input into the front chamber from the first air inlet, or input into the rear chamber from the second air inlet; The hammer body has a head end close to the first air inlet and a tail end close to the second air inlet, and an exhaust passage is provided on the outer peripheral surface of the hammer body, wherein the exhaust passage extends to the The head end is connected to the front chamber, and the exhaust passage is not connected to the rear end, and is not connected to the rear chamber. When the high-pressure gas is injected into the rear chamber from the second air inlet, the hammer body is high-pressured The gas is pushed to move toward the tool head; when the high-pressure gas is injected into the front chamber from the first air inlet, the hammer body is pushed away from the tool head by the high-pressure gas. When the air passage communicates with the exhaust hole, the high-pressure gas in the front chamber is discharged through the exhaust passage and the exhaust hole, thereby reducing the force for pushing the hammer body.
於一實施例中,該排氣通道係由該鎚體之外周面上凹設之螺旋狀的溝槽所構成。In one embodiment, the exhaust passage is formed by a helical groove concave on the outer peripheral surface of the hammer body.
較佳地,當該鎚體位於與該工具頭相接觸之位置時,該溝槽係與該排氣孔相連通。更進一步地,該環牆設有三個該排氣孔,各排氣孔與該工具頭之距離分別不同;當該鎚體位於與該工具頭相接觸之位置時,該溝槽係與最靠近該工具頭之兩個該排氣孔相連通。Preferably, when the hammer body is in contact with the tool bit, the groove communicates with the exhaust hole. Further, the ring wall is provided with three exhaust holes, and the distances between the exhaust holes and the tool head are different respectively; when the hammer body is in a position in contact with the tool head, the groove is the closest to the tool head. The two exhaust holes of the tool head communicate with each other.
於另一實施例中,該排氣通道包括有相連通之一溝槽部及一筒狀間隙,該溝槽部係沿著鎚體移動方向呈直線狀延伸至該頭端且連通該前腔室,該筒狀間隙係由該鎚體之外周面凹設之帶狀凹部所構成。In another embodiment, the exhaust passage includes a communicating groove portion and a cylindrical gap, and the groove portion extends linearly to the head end along the moving direction of the hammer body and communicates with the front cavity. The cylindrical gap is formed by a band-shaped concave portion concave on the outer peripheral surface of the hammer body.
較佳地,當該鎚體位於與該工具頭相接觸之位置時,該筒狀間隙係與該排氣孔相連通。更進一步地,該環牆設有三個該排氣孔,各排氣孔與該工具頭之距離分別不同;當該鎚體位於與該工具頭相接觸之位置時,該筒狀間隙係與兩個最靠近該工具頭之該排氣孔相連通。Preferably, when the hammer body is in contact with the tool head, the cylindrical gap communicates with the exhaust hole. Furthermore, the annular wall is provided with three exhaust holes, and the distances between the exhaust holes and the tool head are different respectively; when the hammer body is in a position in contact with the tool head, the cylindrical gap is connected to the two holes. The vent holes closest to the tool head communicate with each other.
較佳地,該排氣孔與該工具頭之間的距離係不大於該腔室之總長度的一半。Preferably, the distance between the exhaust hole and the tool head is no greater than half of the total length of the chamber.
本創作之上述目的與優點,不難從以下所選用實施例之詳細說明與附圖中獲得深入了解。The above objects and advantages of the present invention can be easily understood from the detailed description and accompanying drawings of the following selected embodiments.
請參閱第1、2圖,所示者為本創作提供之具有減振結構之氣動衝擊工具的第一實施例,包括有一握柄1、一筒件2、一內管件3及一鎚體4。該握柄1可以形成手槍形或直筒形,於本實施例中,該握柄1係為手槍形。該握柄1之頂部設有一凹室11。該握柄1之底部設有一向上延伸並連通至該凹室11之進氣通道12,以供連接外部的高壓氣體供應源。該進氣通道12中設有一控制氣流通過的氣流開關13,並於該握柄1之一側以一按鈕14連接該氣流開關13以供操作。Please refer to Figures 1 and 2, which show a first embodiment of a pneumatic impact tool with a vibration-damping structure provided for this creation, including a
本實施例之該筒件2係容置於該凹室11中,且該凹室11之底端設有一可供緩衝該筒件2之彈簧15。該筒件2之側壁設有一與該進氣通道12連通之通孔21,且該筒件2中設有一習知的氣流換向閥22,高壓氣體導入該進氣通道12後,會經該通孔21進入該氣流換向閥22,該氣流換向閥22用以將高壓氣體以兩個不同的路徑輸出。The
該內管件3為一圓管結構而具有一環牆31及一由該環牆31所包圍之腔室32,其中該環牆31伸於該筒件2中,並以螺紋鎖固於該筒件2上;該腔室32中設有一密接於該環牆31之鎚體4,進而將該腔室32區隔形成為一前腔室321及一後腔室322。該內管件3伸出該筒件2之外,其前端設有一工具頭5,該工具頭5可依實際使用需求替換之。該環牆31中異於該腔室32之內部設有一連通該氣流換向閥22之氣流通道33,其於該前腔室321形成一第一進氣口34;又該後腔室322設有一連接該氣流換向閥22之第二進氣口35。據此,該氣流換向閥22可在適當時機上擇一地將高壓氣體輸出至該氣流通道33,再由該第一進氣口34注入該前腔室321;或將高壓氣體由該第二進氣口35注入該後腔室322。The
再者,該環牆31設有至少一個令該腔室32連通至外界之排氣孔36;於本實施例中,該排氣孔36的數量有三個,其沿該內管件3之軸向呈直線排列,各排氣孔36與該工具頭5之距離分別不同。更進一步地,上述三個排氣孔36係設置在該第一進氣口34與該第二進氣口35之間,且該排氣孔36與該工具頭5之間的距離係不大於該腔室32之總長度的一半。Furthermore, the
如第2、3圖所示,該鎚體4包括有一靠近該第一進氣口34之頭端41及一靠近該第二進氣口35之尾端42,二者之間具有一外周面43,該鎚體4之外徑與該腔室32之內徑相等,進而使該外周面43密接於該環牆31。該外周面43上設有一排氣通道,其中該排氣通道延伸至該頭端41且連通該前腔室321,且該排氣通道不連接至該尾端42,據此該排氣通道不連通該後腔室322。於本實施例中,該排氣通道係由該外周面43上凹設之溝槽44所構成,其中該溝槽44係呈螺旋狀延伸,該溝槽44的數量及螺距等可依設計需求加以變化。As shown in Figures 2 and 3, the
於本實施例中,該溝槽44與該排氣孔36的相對位置關係如第4圖所示。細言之,在該鎚體4移動到接觸該工具頭5的位置時,該溝槽44與最靠近該工具頭5之兩個排氣孔36相連通。In this embodiment, the relative positional relationship between the
藉由上述結構,當按壓按鈕14控制氣流開關13而使高壓氣體經該進氣通道12導入該氣流換向閥22後,該氣流換向閥22首先將高壓氣體自該第二進氣口35注入該後腔室322,此時高壓氣體推動該鎚體4高速往前移動,並撞擊該工具頭5而產生工作效果。接著,該氣流換向閥22切換供氣路徑,停止將高壓氣體自該第二進氣口35注入該後腔室322,而是改將高壓氣體導入該氣流通道33,再由該第一進氣口34注入該前腔室321。至於氣流換向閥22切換供氣路徑之技術,係為常見之習知技術,於此不再贅述。With the above structure, when the
此時高壓氣體開始推動該鎚體4往後移動。如第4圖所示,當該鎚體4開始離開該工具頭5之際,該前腔室321中之高壓氣體就可以開始經由相連通之該溝槽44與該排氣孔36所構成之通道一路洩往外界,降低該前腔室321內的壓力,進而減弱該鎚體4被推動的力量,據此當該鎚體4移動到如第6圖所示的行程終點時,所造成振動的幅度將會減小。At this time, the high pressure gas starts to push the
又本創作在減振的作用過程中,當該鎚體4在如第4圖所示的行程起點時,藉由該溝槽44連通該排氣孔36,則此時即可開始洩氣,換言之,本創作的洩氣時機相對於習知結構大幅提早,因而能較大幅度地削弱推動鎚體4的力量。In addition, in the process of vibration reduction in the present invention, when the
而且,在鎚體4後退過程中,可如第5圖所示地經由該溝槽44連通不同的排氣孔36以持續洩氣,進而令該鎚體4被推動後退的力量持續削弱,則振動將被大幅減弱。Moreover, during the retreating process of the
本創作之特色便是在氣動工具產生振動的源頭上(即鎚體4後退的撞擊力量),採取洩氣的方式直接削弱鎚體4後退的撞擊力量,達到治本的目的,則能產生較習知結構更佳的減振效果,同時並不影響高壓氣體驅動鎚體前進撞擊工具頭的力量,因而能在兼顧氣動工具輸出功率的前提下產生減振之功效。The feature of this creation is that at the source of the vibration of the pneumatic tool (that is, the impact force of the
第7至9圖為本創作第二實施例,其與前述實施例為具有相同結構的氣動衝擊工具,所不同者為鎚體9之構造,因此後續說明將會加入前述實施例之結構。Figures 7 to 9 show the second embodiment of the invention, which is a pneumatic impact tool with the same structure as the previous embodiment, and the difference is the structure of the
該鎚體9亦與前述實施例同樣具有一頭端91及一尾端92,二者之間具有一外周面93,該外周面93上設有一排氣通道,其中該排氣通道與前述實施例同樣的延伸至該頭端91且連通該前腔室321,且該排氣通道不連接至該尾端92,據此該排氣通道不連通該後腔室322。於本實施例中,該排氣通道係包括有一溝槽部95及一筒狀間隙96。該溝槽部95係沿著鎚體9移動方向呈直線狀延伸,其一端連接至該頭端91且連通該前腔室321,另一端連接該筒狀間隙96。而該筒狀間隙96係為一自該外周面93凹設之帶狀凹部97與該環牆31之間的空間。The
因此形成該排氣通道與該排氣孔36的相對位置關係如第10圖所示。細言之,本實施例在該鎚體9移動到接觸該工具頭5的位置時,該筒狀間隙96與最靠近該工具頭5之兩個排氣孔36相連通。Therefore, the relative positional relationship between the exhaust passage and the
與第一實施例相同的,本實施例當該鎚體9在如第10圖所示的行程起點時,藉由該筒狀間隙96連通該排氣孔36,則此時即可開始洩氣,換言之,洩氣時機相對於習知結構大幅提早。而在鎚體9後退過程中,可如第11圖所示地經由該筒狀間隙96連通不同的排氣孔36以持續洩氣,進而如同第一實施例,持續削弱該鎚體9被推動後退的力量,使得該鎚體9到達第12圖行程終點時,振動被大幅減弱。Similar to the first embodiment, in this embodiment, when the
以上實施例之揭示僅用以說明本創作,並非用以限制本創作,舉凡等效元件之置換仍應隸屬本創作之範疇。The disclosure of the above embodiments is only used to illustrate the present invention, not to limit the present invention, and the replacement of equivalent elements should still belong to the scope of the present invention.
綜上所述,可使熟知本領域技術者明瞭本創作確可達成前述目的,實已符合專利法之規定,爰依法提出申請。To sum up, those skilled in the art can understand that this creation can indeed achieve the above-mentioned purpose, and it actually complies with the provisions of the Patent Law, and an application can be filed in accordance with the law.
1:握柄 11:凹室 12:進氣通道 13:氣流開關 14:按鈕 15:彈簧 2:筒件 21:通孔 22:氣流換向閥 3:內管件 31:環牆 32:腔室 321:前腔室 322:後腔室 33:氣流通道 34:第一進氣口 35:第二進氣口 36:排氣孔 4:鎚體 41:頭端 42:尾端 43:外周面 44:溝槽 5:工具頭 9:鎚體 91:頭端 92:尾端 93:外周面 95:溝槽部 96:筒狀間隙 97:帶狀凹部 1: Grip 11: Alcove 12: Intake channel 13: Airflow switch 14: Button 15: Spring 2: Cartridge 21: Through hole 22: Air flow reversing valve 3: Inner pipe fittings 31: Ring Wall 32: Chamber 321: Front Chamber 322: rear chamber 33: Air flow channel 34: First air intake 35: Second air intake 36: exhaust hole 4: Hammer body 41: head end 42: tail end 43: Outer peripheral surface 44: Groove 5: Tool head 9: Hammer body 91: head end 92: tail end 93: Peripheral surface 95: groove part 96: Cylindrical gap 97: Ribbon recess
第1圖為本創作第一實施例之立體分解示意圖; 第2圖為本創作第一實施例整體之剖面示意圖; 第3圖為本創作第一實施例鎚體之立體圖; 第4圖至第6圖為本創作第一實施例之動作狀態示意圖; 第7圖為本創作第二實施例之立體分解示意圖; 第8圖為本創作第二實施例整體之剖面示意圖; 第9圖為本創作第二實施例鎚體之立體圖; 第10圖至第12圖為本創作第二實施例之動作狀態示意圖。 Figure 1 is a schematic exploded perspective view of the first embodiment of the creation; Figure 2 is a schematic cross-sectional view of the entirety of the first embodiment of the creation; Figure 3 is a three-dimensional view of the hammer body according to the first embodiment of the creation; Figures 4 to 6 are schematic diagrams of the action states of the first embodiment of the creation; Fig. 7 is a three-dimensional exploded schematic diagram of the second embodiment of the creation; Figure 8 is a schematic cross-sectional view of the whole of the second embodiment of the creation; Figure 9 is a three-dimensional view of the hammer body according to the second embodiment of the creation; Figures 10 to 12 are schematic diagrams of operating states of the second embodiment of the invention.
1:握柄 1: Grip
11:凹室 11: Alcove
12:進氣通道 12: Intake channel
13:氣流開關 13: Airflow switch
14:按鈕 14: Button
15:彈簧 15: Spring
2:筒件 2: Cartridge
21:通孔 21: Through hole
22:氣流換向閥 22: Air flow reversing valve
3:內管件 3: Inner pipe fittings
31:環牆 31: Ring Wall
32:腔室 32: Chamber
321:前腔室 321: Front Chamber
322:後腔室 322: rear chamber
33:氣流通道 33: Air flow channel
34:第一進氣口 34: First air intake
35:第二進氣口 35: Second air intake
36:排氣孔 36: exhaust hole
4:鎚體 4: Hammer body
41:頭端 41: head end
42:尾端 42: tail end
44:溝槽 44: Groove
5:工具頭 5: Tool head
Claims (10)
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI792899B (en) * | 2022-01-28 | 2023-02-11 | 大里興業股份有限公司 | Pneumatic impact tool with vibration-absorbing structure |
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TWI792899B (en) * | 2022-01-28 | 2023-02-11 | 大里興業股份有限公司 | Pneumatic impact tool with vibration-absorbing structure |
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