201219166 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種釘搶’特別是指一種自動連續擊 發的釘搶。 【先前技術】 以美國專利第3552270號案、第5671330號案為例， 分別是藉由一開關閥組、一作動閥組導引氣流進、出該氣 缸’進而能夠在不放開板機的情形下，達到連續擊釘的目 的。惟’在第3552270號案中，所有的進氣、排氣動作與 氣體流向控制，都集中由該開關閥組控制，以致於該開關 閥組構造複雜、安裝不易，且動作不順暢。而第567133〇 號案雖然是同時以開關閥組、進氣閥組互相配合控制進氣 、排氣動作與氣體流向控制，惟，該開關閥組、作動閥組 位置的變化，必需以氣流的流向來控制，因此，不僅會提 升流道設計的複雜性，且穩定性不足，重要的是，在作動 閥組内並沒有設置彈性元件，所以，無法確保作動闕組在 切斷氣源後是否回復至起始位置，所以，报有可能在使用 者接上氣源時，釘搶會自動先做擊發的動作，導致危險產 生。 【發明内容】 因此’本發明之目的，即在 - 在扣供—種能夠提升操作順 暢性及簡化元件的自動連續擊發的釘搶。 於是，本發明的自動連續擊 只事赞的釘搶，包含一機體、 一氣動單元、-流道單元、一匕3機體 開關閥組，及—作動閥組。 201219166 該氣動單元安裝在該機體内，具有—氣缸、穿置在該氣缸 内的塞桿，及設置該氣紅—端的—梭動閥。該流道單元 用於傳輸第-氣；4與—第二氣流朝該氣動單元流動，使 X梭動閥先 '後㈣H啟該氣紅，及驅動該塞桿完成一 次擊釘動作’及傳輸該第-氣流與該第二氣流遠離該氣動 早疋朝外m該開關組具有安裝在該機體的一闊座 严及穿置在忒閥座的一開關閥桿’該開關閥桿在容許第一 氣流進、出該閥座的一進氣位置與一排氣位置間位移。該 乍動閥’、且具有安裝在該機體的一閥套，及穿置在該閥套的 一作動閥桿’該作動閥桿在—第—位置與—第二位置間位 移’且在該開關閥桿保持於該排氣位置的情形下，於每一 ，擊釘動作完錢，該作„桿切述朝外界流動的第二 :流驅動’由容許第-氣流通過且朝該氣缸單元流動的第 位置，位移至容許第：氣流通過^朝該氣缸單元流動的 第一位置，使該塞桿進行下一次擊釘動作。 本發明的功效是在該開關閥組不變動狀態的情形下， ’以輸出的第二氣流仙於該作動閥组後，再以位移後的 作動閥組輸入第二氣流作用於該氣動單元，藉此，達到自 動連續擊釘的目的。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之—個較佳實施例的詳細說明中，將可 清楚的呈現。 參閱圖1 ® 2，本發明自動連續擊發的釘搶的-較佳 201219166 實施例包含一機體i、—氣動單元2、一開關閥組3、一作 動閥組4，及一流道單元5。 該機體1具有形成在一端部且用於出釘的一搶嘴U， 及形成在另一端部的一握柄12。 該氣動單元2安裝在該機體1内，並具有一氣缸21、 穿置在該氣缸21内的一塞桿22，及設置該氣缸21 一端且 可卸離地封閉該氣缸21的一梭動閥23。該氣缸21更具有 鄰近另一端的數回收孔211。 該開關閥組3具有安裝在該機體1的一閥座201219166 VI. Description of the Invention: [Technical Field to Which the Invention Is Ascribed] The present invention relates to a nail rush, particularly to a nail that is automatically and continuously fired. [Prior Art] Taking the cases of U.S. Patent No. 3552270 and No. 5,671,330 as examples, respectively, the airflow is introduced into and out of the cylinder by a switching valve group and an actuating valve group, thereby enabling the board to be unopened. In the case, the purpose of continuous nailing is achieved. However, in the case of No. 3552270, all the intake and exhaust operations and the gas flow direction control are controlled by the switch valve group, so that the switch valve group has a complicated structure, is difficult to install, and does not operate smoothly. In the case of the No. 567133 同时 case, the switching valve group and the intake valve group are mutually controlled to control the intake, exhaust and gas flow direction control. However, the position of the switching valve group and the actuating valve group must be changed by the air flow. Flow direction control, therefore, not only will the complexity of the flow channel design be improved, but also the stability is insufficient. It is important that no elastic elements are provided in the actuating valve group, so it is impossible to ensure whether the actuating group recovers after cutting off the air source. To the starting position, it is possible that when the user picks up the air source, the nail grab will automatically perform the firing action first, resulting in danger. SUMMARY OF THE INVENTION Therefore, the object of the present invention is to improve the smoothness of operation and to simplify the automatic continuous firing of components. Thus, the automatic continuous hitting of the present invention is only a sneak peek, including a body, a pneumatic unit, a flow path unit, a 机3 body switch valve group, and an actuating valve group. 201219166 The pneumatic unit is installed in the body, and has a cylinder, a plug rod disposed in the cylinder, and a shuttle valve for setting the gas red end. The flow channel unit is configured to transmit the first gas; the fourth and the second air flow flow toward the pneumatic unit, so that the X shuttle valve first 'after (four) H starts the gas red, and drives the plug rod to complete a nailing action' and transmission The first airflow and the second airflow are away from the pneumatic front and the outer side, and the switch group has a wide seat mounted on the body and a switch valve stem disposed on the valve seat. The switch stem is in the allowable A gas flow enters and exits between an intake position of the valve seat and an exhaust position. The squib valve' has a valve sleeve mounted on the body, and an actuating valve stem disposed on the valve sleeve, the actuating valve stem is displaced between a first position and a second position In the case where the switching valve stem is held at the exhausting position, the nailing operation is completed, and the second: flow driving is performed by the allowable first airflow toward the cylinder unit. The first position of the flow, the displacement to the allowable first: the first position where the airflow passes through the cylinder unit, causing the plug to perform the next nailing operation. The effect of the present invention is that the switching valve group does not change state. After the second airflow is output to the pneumatic unit, the second airflow is input to the pneumatic unit by the actuating valve group after the displacement, thereby achieving the purpose of automatic continuous nailing. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments with reference to the drawings. Referring to Figure 1 ® 2, the nail of the automatic continuous firing of the present invention Grab - compare 201219166 The embodiment comprises a body i, a pneumatic unit 2, a switching valve group 3, an actuating valve group 4, and a first-stage channel unit 5. The body 1 has a grab nozzle U formed at one end and used for nailing. And a handle 12 formed at the other end. The pneumatic unit 2 is mounted in the body 1 and has a cylinder 21, a plug rod 22 disposed in the cylinder 21, and one end of the cylinder 21 A shuttle valve 23 of the cylinder 21 is detachably closed. The cylinder 21 further has a plurality of recovery holes 211 adjacent to the other end. The switching valve group 3 has a valve seat mounted on the body 1.
第一軸線XI穿置在該閥座3 i的一開關閥桿32、套置在該 開關閥桿32的-第—密封件33與—第二密封件％，及設 置在該開關閥桿32與該閥座31間的一第一彈性元件％。 該開關閥才干32沿穿出該間座31的方向與深入該闊座的 方=在-輯位置（如圖2)與—排氣位置（如圖3)間位移。該 第一密封件33隨該進氣位置的開關閥桿32與該閥座3 :接觸。該第二密封件34隨該排氣位置的開關間… 該閥座31氣宗垃結 β够 ’、 “接觸° 3亥第一彈性元件35在沒有外力作用 ’以彈力推頂該開關閥桿32穩定於該進氣位置。 ιΠΓΓ4具有安裝在該機體的一間套41、沿1 =線幻穿置在該間套41的一作動間桿42 1 套41且鄰近該梭動間23的一氣孔43、相對該氣孔43开亥間 在該作動閥桿42與該閥套 开;成 動閥桿42而如… ％隙44、套置在讀作 塾圈45、_第::間距且與該閥… 第一塾圈46,及一第三墊圈47,及設置在該作 5 201219166 動閥桿42與該閥套4〗間的一第二彈性元件48。該作動閥 桿42沿朝向該梭動閥23的方向與反向於該梭動閥23的方 向在第位置（如圖2)與一第二位置（如圖4)間位移。該第 二彈性元件48在沒有外力作用下，以彈力推頂該作動閥桿 42穩定於該第一位置。 該流道單元5具有形成在該機體1的握柄12且用於儲 備氣流的一儲氣室51、形成在該氣缸21、該梭動閥23 一 側與該機體i間且連通該儲氣室51的一高壓室52、形成在 該氣缸21與該機體1間且透過該等回收孔2U連通該氣缸 21的-回收氣室53、形成在該梭動閥23另—側與該機體i 間的-壓差室54、連通該閥套41與該壓差室M的一雙向 流道55、連通該閥座31 '該閥套“與該儲氣室η的一中 繼流道56,及連通該回收氣室53與該閥套41的一回收流 道57。 參閱圖2’常態時，該開關閥桿32不被壓縮而位於進 氣位置’此時，該第-密封件33會與該閥座Μ氣密接觸 ’而阻斷該閥座31與外界連通，該第二密封件34在不與 該閥座氣密接觸的情形下，會釋放_第__氣流由該闊座 31經該中繼流道56進入該閱套4卜由於隨該作動間桿42 位於該第-位置的第-墊圈45、第三墊圈Ο會與該閥套 氣密接觸，而分敎斷該氣孔43與㈣氣室η連通， 及阻斷該回收氣室53與該氣孔43 _ mu 流進入該閥套41後，會由兮搀阽 Η由該環隙44紐該氣孔43、該雙向 流道55進入該壓差室54。 201219166 猎此’當—第二氣流直接由該儲氣室η直接進入該高 ^至舍^且該第—氣流由該雙向流道55通往該壓差室54 為該高壓室52刪差t 54内的氣壓成平衡狀 梭動間23受彈力作用維持在封閉該氣缸21的狀 4，且該尚壓室52常態保有高壓氣體。 參閱圖3,擊釘時，該開關閥桿⑽該第一轴線幻被 壓縮而由該進氣位置朝該排氣位置位移，此時’該第一密 封件33會脫離與該_ 31，而開通外界與該閥座η，同 夺該第封件34會與該閥座31氣密接觸，而阻斷該 閥座與該儲氣室51連通，而不再輸送第—氣流進入該 閥座31 ’藉此，在壓縮該開關閥桿32的過程中，會因為該 闊座3!形成常壓狀態，而不會有氣壓阻礙該開關間桿二 位移的情形，且壓縮該開關閥桿32後，會因為該壓差室Η 與該雙向流道55、該閥座31連通至大氣，使該高壓室Μ 與該壓差室54形成懸，以該高壓室52内的第二氣流推 頂該梭動閥23朝反向於該氣缸21的方向位移，並開放該 氣紅，使該塞桿22受迫於第二氣流而完成擊釘作業，同 時’反向於該氣缸21位移的梭動閥23，會壓縮該壓差室 54内的氣體，使原本充滿在該壓差室54内的第一氣流朝遠 離該氣缸21的方向被排擠入該雙向流道55，經該氣孔u 回流至該閥座3 1且排往外界。 參閱圖4，在該塞桿22位移而擊釘的過程中，該氣缸 21内的第二氣流會隨著該塞桿22位移，而由該等回收孔 211被推擠進入該回收氣室53，同時有部份氣體從搶嘴u 201219166 排出，且由该回收氣室53經該回收流道57竄流至該閥套 1内並推擠該作動閥桿42由該第一位置位移至該第二位 >閱圖5，此時，該第一墊圈45會進入該環隙44内而 1 L該儲氣至5 i與該氣孔43 ’使該儲氣室5】内的氣流直 接由該氣孔43經該閥套41、該雙向流道55進人該壓差室 形成朝該氣缸21方向流動且作用於該梭動閥23的第 —氣流’使該梭動閥23再-次封閉該氣缸21，且該第二塾 θ與Θ閥套41氣密接觸’而阻斷該中繼流道56與該 氣孔乂，此時，該回收氣室53中的氣體會從該回收孔2ιι 烚“氣21内將該塞桿22推回，而剩餘氣體則從該 搶嘴11方向排出，進行回收該塞桿22的動作。 ▲參閱圖6,在回收該塞桿22的過程中，該塞桿22會朝 该梭動閥23的方向復歸原位， 該回收氣室53與該閥套 内的第二氣流會朝遠離該氣 妁方向由该機體1的搶 ώ ’藉此，該閥套41内會因為形成常壓狀態，使該 作動閥捍42受該第二彈性元件 該第-位置。 $刀作用力而復歸至 作㈣: 仍然維持在該排氣位置，而· =捍42又復歸至該第—位置_下 : 儲乳室51内的氣流持續進入該高壓室 U為' 21流動且作用於該梭動閥23 V朝該^ 3〜圖5的動作，達到連續擊釘的目的乳至:而重復前心 復至該進氣位置為止。 至相關間桿32 [ 也就是說，如果操作者持續㈣該開關 T «3 2 >而心 201219166 =關::32停留在該排氣位置’會自動切換成連續擊發 ==作者每擊•一次’就鬆放該開關間…復 單擊發模式。 動作而自動切換成 據上所述可知，本發明之自動連續擊發 列優點及功效： j馆…负广The first axis XI is disposed on an opening and closing valve rod 32 of the valve seat 3 i , the first sealing member 33 and the second sealing member % disposed on the switching valve rod 32 , and the switching valve rod 32 disposed on the first axis XI A first elastic element % between the valve seat 31 and the valve seat 31. The switching valve member 32 is displaced between the direction in which the seat 31 is passed through and the side in the depth of the wide seat (in Figure 2) and the exhaust position (Fig. 3). The first seal member 33 is in contact with the valve seat 3 with the opening and closing valve stem 32 of the intake position. The second sealing member 34 is connected to the switch position of the exhausting position. The valve seat 31 is ventilated and has a sufficient amount of force. The first elastic member 35 has no external force to elastically push the switching valve. The rod 32 is stabilized at the intake position. The ιΠΓΓ4 has a sleeve 41 mounted on the body, and an actuator rod 42 1 set 41 which is slidably disposed on the sleeve 41 along the 1 = line and adjacent to the shuttle chamber 23 An air hole 43 is opened relative to the air hole 43 at the actuating valve stem 42 and the valve sleeve; the valve stem 42 is actuated as a ... ... gap 44, nested in the read ring 45, _:: spacing and The valve is a first ring 46, and a third washer 47, and a second elastic member 48 disposed between the valve member 42 and the valve sleeve 4. The actuating valve stem 42 faces the The direction of the shuttle valve 23 and the direction opposite to the shuttle valve 23 are displaced between a first position (as shown in Fig. 2) and a second position (Fig. 4). The second elastic member 48 is free from external force. The actuating valve stem 42 is stabilized in the first position by the elastic pushing. The flow path unit 5 has a gas storage chamber 51 formed on the grip 12 of the body 1 and used for storing the airflow. a high pressure chamber 52 that communicates with the air reservoir 51 between the cylinder 21, the shuttle valve 23 side and the body i, is formed between the cylinder 21 and the body 1 and communicates through the recovery holes 2U. a recovery gas chamber 53 of the cylinder 21, a pressure difference chamber 54 formed between the other side of the shuttle valve 23 and the body i, and a bidirectional flow passage 55 communicating with the valve sleeve 41 and the differential pressure chamber M. The valve seat 31 'the valve sleeve" is a relay flow passage 56 with the gas storage chamber n, and a recovery flow passage 57 that communicates the recovery gas chamber 53 with the valve sleeve 41. Referring to FIG. 2' normal state, the switch valve stem 32 is not compressed and is located at the intake position 'At this time, the first seal member 33 will be in airtight contact with the valve seat '' to block the valve seat 31 from communicating with the outside. The second sealing member 34 releases the ___ airflow from the wide seat 31 through the relay flow path 56 into the reading sleeve 4 in the case of not being in airtight contact with the valve seat. The first washer 45 and the third washer 位于 at the first position of the rod 42 are in airtight contact with the valve sleeve, and the air vent 43 is disconnected from the (4) plenum η, and the recovery plenum 53 is blocked. After the air hole 43_mu flows into the valve sleeve 41, the air gap 43 and the two-way flow path 55 enter the pressure difference chamber 54 by the annular gap 44. 201219166 Hunting this 'when—the second airflow directly enters the high chamber from the air reservoir η and the first airflow from the two-way flow passage 55 leads to the differential pressure chamber 54 for the high pressure chamber 52. The air pressure in the balance air 54 is maintained in the shape 4 of the cylinder 21 by the elastic force, and the pressure chamber 52 normally holds the high pressure gas. Referring to FIG. 3, when the nail is nailed, the first axis of the switch valve stem (10) is slidably compressed and displaced from the intake position toward the exhaust position, and the first seal 33 is disengaged from the _31. Opening the outside and the valve seat η, the same sealing member 34 will be in airtight contact with the valve seat 31, and the valve seat is blocked from communicating with the gas storage chamber 51, and the first airflow is not sent into the valve. The seat 31' is thereby, in the process of compressing the switch valve stem 32, the normal pressure state is formed because the wide seat 3!, and there is no air pressure to hinder the displacement of the switch rod, and the switch valve stem is compressed. After 32, the pressure chamber Η is connected to the two-way flow passage 55 and the valve seat 31 to the atmosphere, so that the high pressure chamber Μ and the differential pressure chamber 54 are suspended, and the second air flow in the high pressure chamber 52 is pushed. The top shuttle valve 23 is displaced in a direction opposite to the cylinder 21, and the gas red is opened, so that the plug rod 22 is forced to the second air flow to complete the nailing operation, and is 'reversed from the displacement of the cylinder 21 The shuttle valve 23 compresses the gas in the differential pressure chamber 54 such that the first airflow originally filled in the differential pressure chamber 54 faces away from the cylinder 21. The direction is displaced into the two-way flow path 55, and is returned to the valve seat 31 through the air hole u and discharged to the outside. Referring to FIG. 4, during the process of the plunger 22 being displaced and the nail is broken, the second airflow in the cylinder 21 is displaced along with the plug rod 22, and is pushed into the recovery air chamber 53 by the recovery holes 211. At the same time, part of the gas is discharged from the nozzle u 201219166, and the recovery gas chamber 53 flows into the valve sleeve 1 through the recovery flow path 57 and pushes the actuation valve stem 42 to be displaced from the first position to the Second position> Figure 5, at this time, the first gasket 45 will enter the annulus 44 and 1 L of the gas storage to 5 i and the air hole 43 ' directly cause the airflow in the gas storage chamber 5] The air hole 43 enters the differential pressure chamber via the valve sleeve 41 and the two-way flow passage 55 to form a first air flow flowing in the direction of the cylinder 21 and acting on the shuttle valve 23 to close the shuttle valve 23 again and again. The cylinder 21, and the second 塾θ is in airtight contact with the Θ valve sleeve 41 to block the relay flow passage 56 and the air vent, and at this time, the gas in the recovery air chamber 53 will be from the recovery hole 2烚 "The stopper rod 22 is pushed back in the gas 21, and the remaining gas is discharged from the rushing nozzle 11 to recover the stopper rod 22. ▲ Referring to Fig. 6, in the recovery of the stopper rod 22 During the process, the plug rod 22 will return to the original position in the direction of the shuttle valve 23, and the recovery air chamber 53 and the second air flow in the valve sleeve will be borrowed from the body 1 in a direction away from the air enthalpy. Therefore, in the valve sleeve 41, the operating valve 捍42 is subjected to the first position by the second elastic member due to the formation of the normal pressure state. The knive force is restored to the fourth (4): still maintained at the exhaust position, and ·=捍42 is returned to the first position_lower: the airflow in the milk storage chamber 51 continues to enter the high pressure chamber U as '21 flow and acts on the shuttle valve 23 V toward the action of the valve 3, FIG. Reach the purpose of continuous nailing until: repeat the front heart to the intake position. To the relevant inter-rod 32 [that is, if the operator continues (4) the switch T «3 2 > and the heart 201219166 = off: : 32 stay in the exhaust position 'will automatically switch to continuous firing == author per hit · once' release the switch... re-click mode. Automatically switch to action as described above, the present invention Automatic continuous firing column advantages and effects: j Hall... negative wide
、t發明能夠以一次按屢該開關閥桿32的動作，自動切 換成㈣發模式或連續擊發模式’對操作者而古，不但不 需要額外的切換動作，且本發明是以該開關閥組3、咳進氣 ::互相配合控制進氣、排氣動作，及同時以氣體與第 作動間：件:广彈性元件48控制該開關閥桿32與該 4 的位置，不但能夠簡化組件與流道，且能夠提 ^作時的順暢性與穩定性，使本發明更具有實用性 便性。 、 〜准以上所述者，僅為本發明之較佳實施例而已，當不 ^以此限疋本發明實施之範圍，即大凡依本發明中請專利 圍及發明說明内谷所作之簡單的等效變化與修部，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是-剖視圖，說明本發明一自動連續擊發的釘搶 的—較佳實施例； 圖2是-剖視圖，說明該較佳實施例中一開關間桿位 於-進氣位置’及一作動閥桿位於一第一位置； 圖3疋-剖視圖，說明該較佳實施例中該開關閱桿位 9 201219166 於一排氣位置，及該作動閥桿位於該第一位置； & 視圖’說明該較佳實施例中該開關閥桿位 於該排軋位置，及該作動閥桿位於—第二位置. 圖5是一到視圖，說明 該第二位置朝該第—位置位移；及佳貫施例中該作動間桿由 圖6是一剖視圖，說明該 該第二位置復歸至該第—位置^貫施例中該作動閥桿由 10 201219166The invention can automatically switch to the (four) hair mode or the continuous firing mode by repeatedly pressing the valve stem 32. The operator does not need an additional switching action, and the present invention is the switch valve group. 3, coughing air intake:: cooperate with each other to control the intake and exhaust operations, and at the same time with the gas and the first move: piece: wide elastic element 48 controls the position of the switch stem 32 and the 4, not only can simplify the assembly and flow The method and the smoothness and stability of the method can be improved, and the invention is more practical and convenient. The above is only the preferred embodiment of the present invention, and is not limited to the scope of the present invention, that is, the simplicity of the patent and the invention in the present invention. Equivalent changes and repairs are still within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a preferred embodiment of an automatic continuous firing of the present invention. FIG. 2 is a cross-sectional view showing the inter-switch rod in the preferred embodiment. The position 'and an actuating valve stem are in a first position; FIG. 3 is a cross-sectional view showing the switch reading position 9 201219166 in an exhaust position in the preferred embodiment, and the actuating valve stem is in the first position; & View' illustrates the preferred embodiment of the switch valve stem in the row rolling position, and the actuating valve stem is in the -second position. Figure 5 is a view to the second position to the first position displacement And in the preferred embodiment, the actuating lever is a cross-sectional view of FIG. 6, which illustrates that the second position is reset to the first position. The actuating valve stem is 10 201219166
【主要元件符號說明】 1 ........ ··機體 42…· …··作動閥桿 11....... "檢〇皆 7r 丄丄 馆角 4 j .…_ 藏* iL 12....... • ·握柄 44… •…·環隙 9 ...... /1 C .... 你 批 ran -ψ· /L* 4 J * * *' …"弟 登圈 21....... ·.氣缸 46····· •…第二墊圈 211…… ••回收孔 47··. •…第三墊圈 22........ ••塞桿 48… •…第二彈性元件 9 ^ . C 〇er 一 Δ J ί夂勒岡 J ..... 3 ......... -開關閥組 51 •…儲氣室 31 ·.···... •閥座 52 …·高壓室 32........ •開關閥桿 53 …·回收氣室 33........ •第岔封件 54 ····壓差室 34........ -第二密封件 55…· …·雙向流道 35........ •第一彈性元件 56♦·.·· …·中繼流道 作動閥組 57.........回收流道 4[Description of main component symbols] 1 ........ ··The body 42...····Operating the valve stem 11....... "Checking all 7r 丄丄 角 corner 4 j ...._藏 * iL 12....... • · Grip 44... •...· Annulus 9 ...... /1 C .... You approve ran -ψ· /L* 4 J * * * ' ..."Didden circle 21....... ·.Cylinder 46·····•...Second washer 211... ••Recovery hole 47··.•...third washer 22.... .... •• Plug rod 48... •...Second elastic element 9 ^ . C 〇er a Δ J ί夂勒冈J ..... 3 ......... - On-off valve group 51 •...Gas chamber 31 ·····... • Seat 52 ...·High pressure chamber 32........ • Switch valve stem 53 ...·Recovery air chamber 33........ • Dimensional seal 54 ····Pressure chamber 34........ -Second seal 55...···Two-way flow path 35........ •First elastic element 56 ♦······Relay flow channel actuation valve group 57......recovery flow passage 4