經濟部中央梂準局員工消费合作社印裝 3G5〇15 A7 __ i、發明説明（1 ) 本發明傺醑於保險閬，尤醑於可防止隨着神壓檐等緞 造檐械中之衝孔或變動負荷加工等直接連结於突破負荷或 變動負荷之高速_简之停止或黏住動作而由低於負荷回路 内本來霈要維持之最低力之負壓所産生之誤動作之保險3G5〇15 A7 printed by the Employee Consumer Cooperative of the Central Bureau of Economic Affairs of the Ministry of Economy __ i. Description of the invention (1) The present invention is not limited to insurance, especially to prevent punching in satin-made eaves such as the eaves of God Or variable load processing, etc. directly connected to the high speed of breaking load or variable load_Jane's stop or sticking action is caused by the misoperation caused by the negative pressure lower than the lowest force that should be maintained in the load circuit.
I 保險閥在油壓回路之内壓超遇一定值時開鬮，釋放油 颸回路内之壓縮油至保險油路中，並且使油壓回路内之壓 力恢至一定數值，被應用於設定油壓回路之供給油壓，或 冲應等過負載安全裝置中。 第7 _中表示沖壓用遇負載安全裝置之設計過程。其 中動作油從油槽501經由供油路5 0 2被吸入油壓泵5 0 3中 ，而壓縮油經由設有止回閬504之負荷回路505供給於設 在沖壓機5 0 6之滑件507内之油壓圓筒508,充滿該油壓 國筒5 0 8而確保级衝墊尺寸量，沖壓機5 0 6以曲柄機構 550驅動滑件507使其垂直的動作一定尺寸之行程，並且 以設在滑件5 0 7上或承塊5 5 1上之模具5 5 2加工工作件 553。但若不恰當的調整沖壓機506之滑件507之行程範 圍高度而使沖壓機不正常的下降，或投入厚度非常大之工 作件5 5 3時，滑件507或祺具5 5 2嚙入承塊551上之工作 件中而變成過負載狀態。但油SH简508之增鼴油從連結 於負荷回路505之安全閬509經由安全油路510 W放至油 槽501中，使油壓圔筒508只退縮嫌衡墊尺寸董，以便使 滑件507可通過下死點中央，藉此阻止發生》負荷而且保 護棋具552及沖壓機506。 -4- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) .裝. 訂 經濟部中央標準局員工消费合作杜印装 A7 _B7_ 五、發明説明（2 ) 油壓泵5 0 3俗使用當負荷回路5 05及油壓國简508之 内部臛力超過一定值時自動停止，而當内部壓力低於一定 值時自動的重新起動之方式。如第8圖所示，油壓泵503 與安全閥509形成一饈。安全閥509像使用可進行吸收過 負荷之大流量釋放，及可進行對壓油之溫昇之溫度補償之 小流董釋放之方式。 在安全閥509之閨毅511之一俩設有將壓油導入油壓 泵503中之吸入口 512,連結於負荷回路505之負荷口 513 ,及連結於釋放回路之回流口 514。在閥殼511上形成有 連通於止回閥504及負荷口 513之壓縮室515,同心狀的 連結於壓縮室515之另一端並且缠通於回流口 514之閥室 516,及同心狀的連通於閥室516之壓力設定室530。 主閥元件517朝向舆閥室516共同之轎心方向可》動 的***閥室516中，而成為階梯筒狀之導引套筒531連鐮 於該主閥元件517可滑動自如的内嵌於壓力設定室530。 在主Μ元件51 7之《心部形成有油通孔5 18，而檐導闢 元件519朝向主閥元件517之軸方向進退自如的***該孔 中。 如第9至12圈所示，油通孔518具有直徑不同之許多 孔，該孔從壓缩室515供依照流動顧序同心狀的具有小直 徑部5 2 0 ,直徑逐渐增大之傾斜部521,及大直徑部5 2 2， 而在油通孔518之小直徑部520與傾斜部521之連接部設 有楢導閥座523。在油通孔518之大直徑部522設有主閥 孔525,該孔連通於主閥元件517之外周之閥室516部分。 本紙張尺度適用中國國家揉準（CNS > Α4規格（210Χ297公釐） (請先閱讀背面之注意事項再填寫本頁) •裝· 訂 305015 A7 B7 __ 五、發明説明（3 ) (請先閲讀背面之注意事項再填寫本頁) 嫌導閥元件519可朝向油通孔518之軸心方向進退自 如的***油通孔518之大直徑部522或》導闢座523内， 而在檐導閥元件519之壓縮室515侧之端部形成有由面對 傾斜部521及»導閥座523之傾斜面所構成之描導閥面 5 2 4 〇 楢導Μ元件519之周面544之全長可》動的接觸大直 徑部522，當該楢導閥面524與嫌導閥座523間之隔離距 離超過一定值時，主閥孔525開啓，而當該楢導閥面524 與描導閥座523間之隔離距離小於一定值時，主閥孔525 閉合。 如第8國所示，嵌入壓力設定室530内部之導引套筒 531具有連鑲於主閥元件517之油通孔518之中空部，而 彈簧支持座5 48可朝向壓力設定室530之軸心方向進退自 如的設在中空部，在瘅簧支持座548内設有連結桿533, 經濟部中央標隼局貝工消費合作社印製 而且在支持座上，可旋轉自如的連結有可進退自如的插通 於閥敕511之端壁5 3 8中之調整螺栓5 3 4。旋轉該諝整螺 栓534，即可使彈簧支持座548猙由連結捍533在壓力設 定室530内進退。利用固定螺栓將讁整嫌栓534固定於閥 毅511,即可固定彈簧支持座548之位置。 在楢導閥元件519上，沿着軸中心設有中心孔545, 而從彈簧支持座548突出之軸狀支架527之前端部可*** 該中心孔5 4 5内。 如第9至12臑所示，在支架527前端設有成為階梯狀 的擴大之頭部541。在該頭部541外部固定有包括〇型琛 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） 經濟部中央橾率局貝工消费合作社印製 A7 B7_____ 五、發明説明（4) 及後備環54 3之封閉構件54 2。 擴大嫌導閥元件519中心孔545之壓力室515使其成 為階梯狀，即可形成副閥室5 3 6。在副閥室5 3 6内***固 定於支架5 2 7前蜩外部之副閥元件5 3 7,封閉構件542,及 可進退自如之後備琢543。 該副閬元件537之中心孔545傜由直徑不同之許多孔 所構成。以壓力設定室530 «之頭部548之端面承受階梯 狀表面5 5 4,即可阻止副閥元件5 3 7從支架滑溜至壓縮室 側。使封閉構件542密接於中心孔545之内周表面，即可 封閉副閥元件5 3 7與支架5 2 7間之空隙。 副閥元件537包括内部滑接於副閥室536之國筒表面 556,及連鏞於壓力設定室530側之錐形副閥表面557。使 形成於副閥室536内之副閥座546與壓縮室515接觸或分 離，即可利用提動（Poppet)条統開閉副閥元件537與棰 導闞元件519間之空隙。 如第9圓所示，當壓縮室515之内應低於一定壓力時 ，該内壓移動至臛力室515，而在支持端面55 0離開閥毅 内部之端面549時，於支架527輿播導閥元件519間，支 架5 2 7之頭部541之端面555經由階梯表面554推壓副閥 元件537之副閥表面557於檐導閥元件519之副閥座546 上將之閉合，同時，如第10至12匾所示，當壓縮室515之 内壓超遇一定壓力值時，該内壓移動至B力設定室530， 而當支架端面550接觸閥毅内方之端面時，於支架527輿 辑導閥元件519之間設置有産生將櫥導閥元件519之《導 本紙張尺度適用中國國家揉準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· 訂 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（5 ) 閥面524推壓於主閥元件517之楢導閥座523,或彈壓於 該慯導Μ座5 2 3個|之力董之支持彈簧5 2 6 a。 如第9至12画所示，在揮簧支持座548輿欏導閥元 件519之間設有壓力設定揮簧52Sb,以便推壓檐導闕元 件519之嚮導閥面5 24於主閥元件517之《導閥座523 , 並且將之惲壓於櫬導閥座523側。 主閥元件517及檐導閥元件519輿壓力設定彈簧526b 在壓縮室515内之壓力低於一定暖力時移動至釅縮室515 側，主閥元件中心端面540回到閥殼内接觸倒端面539, 限制其移動至暖縮室515钿，而當睡縮室515内之應力超 過一定壓力值時，由於面向壓力設定彈簧526b之壓编室 515之内部壓力而移動至壓力設定室530。主閥元件517具 有接觴閬毅中心端面547之導引套筒531。楢導閥元件519 具有接《閥殼内端表面之支持端表面550, 以便限制其移 動至壓力設定室530侧。 當壓縮室515之内壓低於一定壓力值而主閥元件517 及嚮導閥元件519移動至壓縮室515俩時，副閥元件537 之副閥表面557以支持彈簧526a之彈力推壓並閉合嚮導 閥元件519之副閥座546。當壓縮室515之内壓超過一定 壓力值時，各構件移動至壓力設定室530側，支持端面 550接嫌閥殼内端面549。當限制其移動至壓力設定室530 期I時，副閥元件537壓缩室515之個I端面 551承受超過 一定壓力值之壓缩室515之内壓，産生朝向壓力設定室 530側之推力，副閥元件之副閥表面557推壓並閉合《導 -8 ~ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· 訂 A7 B7 305015 五、發明説明（6 ) 閥元件519之副閥座546。 (請先閱讀背面之注意事項再填寫本頁) 如第9至12晒所示，在主閥元件517之傾斜部521輿 撕導閥元件519之播導閥表面524之間設有楢導室528, 而在主閥元件517上設有連通該楢導室528與主閥元件 517之外表面上之閥室516之孔口 529。 在痒止推壓時，壓縮室515之内壓保持於大氣躔力（ 壓力為0)。此時，如第9圖所示，主閥元件517位於移動 至最靠近壓縮室515 «之位置，楢導閥元件519由壓力設 定彈簧526b彈壓至被檐導閥座523承受之位置。 為了準備推壓騣動操作，起動油壓泵503。當壓縮室 515之内壓超過一定壓力值時，主閥元件517及播導閥元 件519由於壓縮室515之内壓而抗拒®力設定彈簧526b 之彈力移動至壓力設定室530側。如第10圖所示，導引套 筒531由閥殼511之閥殼中心端面547承受，限制主閥元 件517移動至壓力設定室530側。此外，支架端面550接 觸閥殼内端面549,而描導閥元件519由於支持彈簧526a 及壓力設定彈簧526b之揮壓力將楢導閥表面524推壓於 主閥元件517之楢導閥座523上並将之閉合。 經濟郎中央標準局員工消費合作社印製 當壓縮室515之内壓到達預載壓力時，油壓泵503停 止動作。此時，支持瘅簧526a可確保釋放壓力之最低基 準值（例如2 MPa)，而旋轉調整螺栓5 34即可改變壓力設 定揮簧526b之揮力，可在超過最低基準值之釋放壓力設 定範豳（例如2〜3.5 HPa)内調整設定壓力。 因為容許支架端面550與閥毅内端面549之接觸，可 -9- 本紙張尺度適用中國國家標準（CNS ) A4規格（2丨OX297公釐） 經濟郎中央標準局員工消費合作社印製 A7 E_ 五、發明説明（7 ) 消除由支架527之頭部541與副閥元件537形成於暖縮室 515上之端面受壓面積上所受之内壓之影楢，因此，楢導 閥元件519在楢導閥元件519之副閥室536與主閥元件 517之楢導閥座523之間承受具有圈圈餅狀小受壓面穑之 睡縮室515之内壓，因而可減小抗拒該壓力之揮睡力，而 為了抗拒高釋放壓力（例如Max. 3.5 MPa),使用小支持揮 簧526a及壓力設定彈簧5 2 6 b,即可將榧導閥元件519之 餹導閥表面524推壓至主Μ元件517之描導閥座523上， 或揮®至嚮導閥座523側，藉此可形成具有低慣性及高速 楢應性之精巧安全閥機構。 當壓縮室515之内壓到連預載壓力而在油釅泵504停 止後，為了設定必要之安金壓力之靜壓而以油壓千斤頂施 加負載於滑件後，壓縮室515之内壓與負載之增加成比例 之增加，而壓縮室515之内應施加於雉導閥元件519之副 閥座546與主閥元件517之權導閥座523之圈圈環餅狀受 壓面積上，而如第11圈所示，該油壓所産生之推力大於支 持彈簧526a及壓力設定彈簧526b之設定壓力時，楢導閥 元件519離開嚮導閥座523,容許壓縮室515内之壓縮油 通過小直徑部520,權導閥座523,雉導室528,孔口 529, 及閥室516,從回流口 514流出。 諝整該調整螺栓534使揮簧支持座548在壓力設定室 530内進退，使得嘗釋放油從回流口 514流出時應油室之 壓力變成一定之過負荷釋放壓力（例如3 MPa),然後調整 支持彈簧526a及壓力設定彈簧526b之彈壓力後，將調整 -10- 本紙張尺度適用中國國家標準（CNS ) A4規格（2丨0'乂297公釐） (請先閱讀背面之注意事項再填寫本頁) 訂 A7 B7 經濟部中央橾率局員工消費合作杜印製 ---— 五·、發明説明 ( 8 ) • "· 1 I 螺 栓 534 以 固 定 嫌 栓 535 固定 於 閥 殼 51 1 上 〇 1 1 1 此時 • 即 使 以 壓 编 室 5 15 之 壓 力 推 壓 封 閉 構 件54 2至 1 I 副 m 元件 537 之 内 周 面 上 ，因 為 與 當 發 生 遇 負 荷 而嫌f 導閥 請 先 1 1 元 件 519 及 封 閉 m 件 542 之移 動 亦 慢 時 比 較 » 壓 縮室 5 15 閲 讀 背 1 1 之 m 力增 加 非 常 慢 9 故 副 閥元 件 537 在 因 壓 縮 室 515 之壓 Λ 之 1 注 力 而 被副 閥 座 546 承 受 之 狀態 下 9 與 m 導 閥 元 件 519 一起 意 ψ 1 項 I 移 動 至應 力 設 定 室 530 m 〇因 此 壓 縮 油 不 會 從 壓 縮室 515 再 通 過 描導 閥 元 件 5 1 9 與 副 閥元 件 537 之 間 洩 漏 至 壓力 設定 % 本 裝 頁 1 室 53 0内 〇 >w«· 1 以如 上 所 述 的 設 定 靜 饜之 安 全 m 509 設 定 動 壓， 結果 1 1 發 生 過負 荷 時 $ 如 第 11 9 1 2 所示， 封閉構件54 2甲壓 1 I 縮 室 5 15 之 壓 力 而 被 推 壓 至副 閥 元 件 537 之 内 周 表面 ，使 1 訂 得 突 然移 動 至 壓 力 設 定 室 530 拥 之 副 閥 元 件 537 靜止 不動 1 | 0 但 由於 從 壓 縮 室 515 供 供給 於 副 閥 元 件 537 與 嚮導 閥元 1 I 件 519之 支 持 插 通 孔 536 間之 細 小 空 隙 内 之 壓 编 油之 潤滑 1 1 作 用 ，嚮 導 閥 元 件 519 可 非常 順 利 的 對 副 閥 元 件 537 移動 〇 結 果， 動 壓 設 定 壓 力 與 靜壓 設 定 壓 力 間 之 差 變 成靜 壓設 1 1 定 壓 力之 大 約 土 2% , 同 時 ，動 壓 設 定 壓 力 之 變 動 亦變 成大 1 Γ· 約 土 IX以内。 1 1*. 當正 常 的 推 m 而 發 生 過負 荷 時 » 播 導 閥 元 件 519 稍微 1 1 I 開 啓 ,而 當 其 輿 楢 導 閥 座 523 分 離 時 > 大 量 壓 縮 油流 入楢 1 1 導 室 528 内 t 而 壓 縮 油 對 楢導 閥 表 面 524 全 面 發 生作 用， 1 I 楢 導 閥元 件 51 9 之 開 放 受 壓面 積 從 副 閥 座 546 輿 主閬 元件 1 1 5 1 7 間之 囫 圈 環 狀 小 受 m 面稹 立 突 然 的 發 生 巨 大 變化 ，變 1 1 -11- 1 1 1 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 經濟部中央標準局員.工消費合作社印裝 A7 B7 五、發明説明（9 ) 成副閥座548與主閥元件517之周面間之圈圈環狀拼大受 壓面積，産生抗拒支持彈管52 6a及鼷力設定揮簧526b之 大油壓推力，嚮導閥元件519立即移動至壓力設定室530 槲，同時，油壓作用於具有可立即在壓縮室515钿産生巨 大開閥推力之大受壓面積之傾斜部5 2 4之金面，主閥元件 517産生迅速的移動至壓縮室515側之巨大之油壓開閥推 力，以便抗拒酋嚮導閥元件519閉合楢導閥座523時，由 壓縮室515之内壓所産生，並且作用於主閥元件517之小 受壓面積之壓縮室515之俩端面之朝向壓力設定室530側 方向之小閉閥推力，最後使主閥元件517迅速的全開。 結果，主閥元件517與描導閥元件519互相彈開而迅 速的開啓，主鬮孔525立即開啓.大量壓縮油通遇主閥孔 525排洩至闕室516中，立卽消除遇負荷條件。 因為楢導闕元件519之副閥室536之周面與副閥元件 537間之空隙小，故即使在發生《負荷而閥元件537離開 副閥座5 4 6時，由於該空隙之限制，可防止壓縮油從壓缩 室5 15經由檐導閥元件519與副閥元件5 3 7間之空隙洩漏 至壓力設定室5 3 0。 開始沖壓作業而開始沖壓加工後，負荷逐漸增大，因 此負荷回路505之内壓及油壓圓筒508之内壓增大，如第 13，14圖所示，沖壓機本鼸發生彈性變形而儲存能量。 因完成打穿而負荷突然消失時，各沖壓機迅速的釋放由於 揮性變形而儲存之能董，試圖回到原來之正常形狀而産生 與沖壓加工時之負荷相反之力量於沖壓機。结果，油壓圄 -12- 本紙張尺度適用中國國家標準（CNS > A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· 訂 經濟部中央標隼局員工消費合作社印製 A7 B7 五、發明説明（i〇 ) 筒508因憤性而迅速的伸長，使得負荷回路505之内壓及 油應圓筒508之内壓突然減小。此時若油壓圓筒508因慣 性而過度的伸長時，如第15圈所示，負荷回路505之内壓 變成低於本來負荷回路505必須維持之最低壓力之預負荷 壓力之負壓，在最大與最小預負壓力間之範園内脈動而收 斂成預負荷壓力。 此外，由於以高速進行變速動作之一般油壓圓筒或一 般油壓圔筒之靜態動作，亦可同樣的産生負壓，而且内壓 在最大與最小預負荷壓力間之範圍内脈動而收斂成預負荷 壓力。 當打穿負荷發生作用而使壓縮室515之内壓變成負壓 時，該懕力進入主閥元件517之®縮室515期I或櫥導閥元 件519,而具有大受壓面稹之主閬元件517受到該負壓極 大之影響。因此，如第12圔所示，楢導閥座523可能雄開 描導閥表面524而發生誤動作。又因主閥元件517與撕導 閥元件519由於壓縮室515之内壓脈動而進退，檐導閥元 件519與嚮導閥座523間之封閉力變成不棰定，結果雖然 未成為遇負荷狀態，但如第12圖所示的發生誤動作。 本發明傜鑑於上述問題而開發者。其目的為提供一種 高速高流量安全閥，該安全閥可防止因打穿或圔茼之黏着 動作而發生之低於本來負荷回路必須維持之最低壓所造成 之誤動作。 本發明之另一目的為提供一種根據發生高低脈動壓時 仍可使安全閥穗定的動作，而形成為零機械狀態（當機械 -13- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 裝- 訂 A7 3〇5〇15 B7 五、發明説明（11 ) (請先閱讀背面之注意事項再填寫本頁) 停止時儲存於機械内之能量變成零之狀態）做為近年來= 安全設計思想之一種狀態之設計思想之安全閥。 為了達成上述目的，本發明像一種具有設置達结於負 荷回路之負荷口，連結於回油路之回流口，及連通負蒱口 與回流口之内部油路之閥毅，及酋負荷回路之臛力變成高 於一定值時内部油路開啓，負荷回路之壓力變成低於一定 值以下時閉合内部油路之安全閥元件之安全閥，其特撖為 :在負荷口與安全閥元件間之内部油路之部分設置防止從 閥元件側倒流至負荷口期I之止回閥。 由於這種結構，當負荷回路内之壓力變成負壓時，止 回閥閉合，實施油壓鎖定而防止安全閥元件衝入負荷口個I。 本發明中，若具有將止回閥與安全閥元件間之内部油 路之部分連通於回流口之復置油路，及開閉復置油路之後 置閥時，由於復置閥之撤小開啓，以復置油路将止回閥與 安全閥元件間之内部油路之部分連通於回流口，即可解除 油壓鎖定，反復的進行負荷變動而降低因油壓鎖定而逐漸 昇高之止回閥與安全閥元件間之壓力，復置負荷口之壓縮 油。 經濟部中央標準局員工消費合作社印製 此外，可拜著復置閥之全開啓，以復置油路將止回閥 與安全閥元件間之内部油路之部分連通於回流口而解除油 壓鎖定，同時在止回閥與安全閥元件間之内壓擇放成大氣 壓力後，將負荷口之内壓釋放成大氣壓力。 以下參照圖式説明本發明之實施例。 如第1圖所示，將本發明一實施例之安全閥應用於沖 -14- 孓紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 經濟部中央標準局員工消費合作社印製 A7 B7_ 五、發明説明（12 ) 壓機之過負荷安全裝置。該安全閥401與油壓泵402組合 成一體。 在安全閥401之閥殻4 04之一側設有將壓油導入油壓 泵402之吸入口 405,連結於負荷回路之負荷口 406，及連 結於釋放回路之回流口 407。在閥般404内侧形成有連通 於油壓泵4 0 2之排出閥4 0 3與負荷口 406之壓縮室408， 成為同心軸的連鑲於該壓縮室408而連通於回流口 407之 閥室409,及成為同心軸狀的連結於閥室409之壓力設定 室 4 3 2。 具有階梯圓筒狀主閥元件410可滑動自如的朝向軸心 方向***閥室4 0 9中，迪结於主閥元件之階梯圓筒狀導引 套筒433可滑動自如的固定於壓力設定室432内。此外， 嚮導閥元件412可朝向主閥元件410之軸向進退自如的插 入主閥元件410之中心部及形成於主閥元件410之中心之 油通孔4 1 1中。 如第2至6圖所示，油通孔411從壓力室408成為同 心狀的依次由直徑不同之小直徑部413，直徑逐渐擴大之 傾斜部414,及大直徑部415所構成。在小直徑部413與 傾斜部414之連結部分形成有與櫥導閥元件412接離的楢 導閥座416。 嚮導閥元件412可滑動自如的固定於大直徑部415内 ,而且在壓縮室408側形成包括傾斜部414及抗拒嚮導閥 座416之描導閥表面417。 在主閥元件410之大直徑部415上形成有容許油通孔 -15- 本紙張尺度適用中國國家橾隼（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· 訂 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（13 ) 411缠通於主閥元件410之外部届面上之閥室409之主閥 元件418。主閥元件412之周表面419在其全面可滑動自 如的接觸大直徑部415之内部。當其與楢導閥表面417之 播導閥座416間之距離超過一定值時，主閥孔418開啓， 而當其與楢導閥表面417之楢導閥座416間之距離小於一 定值時，主閥孔418閉合。 如第1及6圔所示，固定於壓力設定室432内之導引 套筒433具有連結於主閥元件410之油通孔411之中空部 。在該中空部内設有可朝向壓力設定室432之轅向進退自 如之彈簧支持座4 3 4 „連結捍4 3 6固定於揮簧支持座4 34内 ，並且可旋轉自如的達結有可朝向閥毅4 04之端壁進退自 如的***之諝整螺栓437。旋轉該調整螺栓437可使彈簧 支持座434經由連結捍436在壓力設定室432内進退自如 。以固定螺栓438將調整螺全437固定於閥毅404上，卽 可固定彈簧支持座4 34之位置。 在楢導閥元件412上，沿着軸心形成有中心孔439, 從撣簧支持座434突出之軸狀支架440之前端***該中心 4 3 9 中 0 如第2至6圔所示，在該支架440之前端形成有成為 階梯狀擴張之頭部441,在頭部441外部固定有包括0型 琛及後備琛44 3之封閉構件4 4 2。 將楢導閥元件412之中心孔439之壓縮室408側鑛張 成階梯狀，卽可形成副閥室444,而在該副闕室444中插 入固定在支架前端外部之副閥元件445 ,封閉構件44 2 ,及 一 1 6 _ 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝- 訂 經濟部中央標準局員工消費合作社印製 Α7 Β7 五、發明説明（14 ) 可進退自如之後備環44 3„ 該副閥元件445之中心孔446上形成有直徑不同之許 多孔。以壓力設定室432側上之頭部441之纗表面448接 受階梯狀表面447,卽可防止副閥元件445脱離支架440移 動至壓力室408锢容許封閉構件442緊密黏接於中心孔 446之内周表面，即可封閉副閥元件445與支架440間之 空隙。 副閥元件445包括可滑動自如的接觸於副閥室444内 部之鬮筒表面449及連結於壓力設定室432侧之錐形副閥 表面450。使形成於副閥室444内之副闢座451與壓縮室 4 0 8接離，即可利用提動条統開閉副閥元件445與檐導閬 元件412間之空敝。 如第2圓所示，當壓縮室408内之壓力低於一定®力 值時，該内壓移動至壓编室408側。當支架端面452與閥 殼内方之端面453分離時，在支架440與播導閥元件412 間，支架440之頭部441之端面448經由副閥元件445之 階梯表面447將副閥元件445之副閥表面450推壓至楢導 閥元件412之副閥座450並將之閉合，同時，如第3至6 圈所示，當壓縮室408之内壓超過一定壓力時，該内壓移 動至壓力設定室432侧。當支架端面452接«閥殼内方之 端面453時，在支架440與楢導閥元件412間設置支持揮 簧420a以便産生壓力，將檐導閥元件412之«導Μ表面 417推壓至主閥室410之楢導閥座416。 加之，如第1至6圖所示，在彈镰支持座434輿期I導 -17- 本紙張尺度適用中國國家標隼（CNS ) A4規格（210'X297公釐） -------：---裝-- (請先閲讀背面之注意事項再填寫本頁) 訂 ^05015 A7 B7 五、發明説明（15 ) 閥元件412之間設有用來産生檐導閥元件412之癯導閥面 417推至主閥元件410之腌座416並且揮壓至楢導閥座 416钿之支持彈簧4 2 0 b。 主閥元件410及楢導閥元件412在壓縮室408之内壓 小於一定值時由壓力設定彈簧420b推動而移動至壓縮室 408側，主閥元件中心端面454回行至閥殼而接觸侧端面 455，被限制移動至壓缩室408拥，而當壓縮室408之内 壓超過一定應力值時，由於抗拒壓力設定彈簧4 20 b之彈 力之壓縮室408之内壓而移動至壓力設定室432側，主閥 元件410之導引套筒433接觸閥毅中心端面456，楢導鬮 元件412之支持端面452接觸閥殼内端面453,被限制其 移動至壓力設定室4 3 2侧。 當壓定室4 08之内壓小於一定壓力值而描導閥元件 412移動至壓縮室408側時，副閥元件445之副閥表面 451以支持彈簧420a之彈力推壓楢導閥元件412之副閥 座450並使其閉合，而當壓縮室408之内壓超遇一定壓力 值時，移動至颸力設定室432 _而支持端面452接觸閥殼 4 5 3。而當移動至壓力設定室4 3 2側之動作被限定時，副 閬元件445之K縮室408細之端面457承受超遇一定壓力 值之®编室408之内壓，並且産生朝向壓力設定室432側 之推力，副閥元件44 5之副閥面450推壓楢導閥元件412 副閥座451並使其閉合。 如第2至6圖所示，在主閥元件410傾斜部414與檐 導閥元件412之嚮導閥表面417之間設有描導室421,而 -18- 本紙張尺度適用中國國家橾準（CNS ) A4規格（210X297公嫠） -------：---裝-- (請先閱讀背面之注意事項再填寫本頁) 訂 經濟部中央橾準局員工消費合作杜印製 經濟部中央標準局貝工消費合作社印製 A7 B7_ 五、發明説明（16 ) 在主Μ元件410上形成有將檐導室421連通至主閥元件 410之外表面上之閬座409之一部份之孔口 422。 加之，在第1至6圈中，於壓缩室408上裝設有當負 荷回路之内歷下降至預負荷壓力以下時閉合並阻止負荷回 路之内壓從閥室490側倒流至負荷回流之止回閥423。 如第2至6圖所示，止回閥423在壓縮室408之軸心 方向中間部具有突出成内額狀之止回閥座424,而以該止 回閥座424壓縮室408分隔成上游室428輿下游室425。 止回闕423包括可朝向應縮室408之軸心方向滑動的 固定於下游室425内之止回閥元件426,及設在下游室425 内將止閥元件426彈壓至止回閥座424方向之止回薄簧 4 2 7 〇 停止沖壓時，如第2鼷所示，壓縮室408之内®保持 大氣壓力（壓力：〇),主閥元件410位於移動至最靠近壓縮 室408侧之位置，而楢導閥元件412由壓力設定揮簧420b 揮壓至被嚮導閥座416接受之位置，而止回閥元件426由 於止回揮簧427之揮力而持鑛推壓在止回閥座424上„為 了進行沖壓而啓動油壓泵402後，當壓縮室408之内壓超 過一定值時，止回閥元件426被上游室428之内壓與下游 室425之内壓間之差壓推向閥室409侧而開啓止回閥423 ，主閥元件410及檐導閥元件412移動至壓力設定室433 倒同時由於壓縮室408之内壓而抗拒壓力設定彈簧420b 之揮力，而導引套筒433被閥殼404之閥殼中心端面456 接受，因而限制主閥元件410移動至®力設定室432側。 -1 9- 本紙張尺度適用中國國家標隼（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· -訂 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（17 ) 加之，支持端面452接觸閥殼内端面453,瓣導閥元件412 因支持彈簧420a及壓力設定彈簧420之揮壓力而將櫥導賊 表面417推向主閥元件410之楢導閥座416。 當壓縮室408之内壓達到預負荷壓力時，油壓泵402 如第4圈所示的停止。此時，支持彈簧420a保持籌放壓 力（例如2 MPa)之最小基準值，因而可旋轉調整螺栓437 改變壓力設定彈簧420b之彈力，調整超過最小基準值之 釋放壓力設定範圍（例如2〜3.5 MPa)之壓力設定。 使支持端面452接觸閥殼内端面453卽可消除由支架 440之頭部441及副閥元件445形成於壓缩室408俩端面 之壓力接受範圃上之壓縮室40 8之内壓之影響，而描導閥 元件412以形成於嚮導閥元件412之副閥座451與主閥元 件410之辋導閥座416間之圈圈餅環狀颸力設定範困接受 壓縮室408之内壓，故可減小抗拒該壓力之彈壓力，而為 了抗拒高釋放壓力（例如最大3.5 MPa),使用小支架彈簧 420a及壓力設定揮簧420，即可將描導閥元件412之楢導 閥面417推壓於主閥元件410之楢導閥座416,或揮壓至 描導閥座416側，可形成具有低慣性及高描鼴速度之精巧 釋放閥機構。 當蹏编室408之内壓到逹預負荷壓力時，油鼴泵402 之動作自動停止，然後，若壓缩室408之内壓變成低於一 定預負荷壓力時，油壓泵402自動起動而將鼷縮室408之 内壓恢復至一定預荷負壓力。 開始沖壓作業後，當滑件接觸工作件時，負荷增加， -2 0- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) 裝· 訂 經濟部中央樣準局員工消費合作社印裝 A7 B7 五、發明説明（18 ) 而壓縮室408嚮應於該負荷之增加從預負荷歷力增加其内 壓。由於油溫之昇高或發生過負載時，壓縮室408之内壓 與負荷之增加成比例的增加，而®縮室408之内壓施加於 檐導閥元件412之副閥座451與主閥元件410楢導閥座 416間之團圈餅環狀受壓區域。如第5圖所示，若該油壓 之推力超過支架彈簧420a及壓力設定彈簧420b之設定壓 力時，嚮導閥元件412與楢導閥座416分離，使壓縮室 408内之壓縮油通過小直徑部413,櫥導閥座416,檐導室 421,巩口 422,及賊室409，從回流口 407流出。 例如由於懕縮油之溫度上昇而使壓力上昇，使得壓编 室408之應力上昇缓慢時，若檐導閥表面417與楢導閥座 416間之距離仍小，而從壓编室408流向檐導室421之流 量仍小時，由於從孔口 4 2 2釋放至閥室4 0 9之壓力使得權 導室421及壓縮室408之内壓燮成低於擇放設定壓力，故 不必開啓主閥孔418即可將播導閬元件412以支持彈簧 420a及壓力設定彈簧420b推壓至楢導閥座416。 若在特定容量條件下進行沖暖而因完成打穿後負荷突 然消失時，各沖壓機因加壓而發生彈性變形，並且迅速的 釋放儲存之能量而恢復原來形狀。因此産生與冲壓形成時 之負荷相反方向之力量，油壓圓筒508由於滑件507等之 愼性而過度伸長，低於本來負荷回路505需要雒持之最低 壓之預負荷壓力之負壓使得負荷回路505之内壓在預負荷 壓力之上下發生脈動而收斂成預負荷壓力，而由於以高速 動作之一般油壓圓筒及一般油壓圖筒之黏住動作，同樣的 -2 1- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X29?公釐） nn ^^^1 ^^^1 ^^^1 «Li I —I· (請先閱讀背面之注意事項再填寫本頁) 訂 3^5U5 A7 B7 五、發明説明（19 ) 由於愼性而變成負壓，在預負荷壓力之上下發生脈動而收 斂成預負荷壓力，上游室428之内壓降低至預負荷壓力以 下時，如第4圈所示，止回閥元件426被施加於止回彈簧 427及止回閬元件426兩侧之油壓之差壓推颸至止回閥座 424而産生油壓鎖定，藉此可防止下游室425侧之壓力降 低至預負荷壓力以下。 結果，可防止主閥元件10及嚮導閥元件412受到負壓 而衝入壓縮室4D8側，或因産生於上游室428之預負荷壓 力之油壓之上下脲動而發生振動。結果可防止釋放閥因打 穿負荷及過負荷檢測用油懕画筒之黏住動作而産生之油壓 脈動所造成之振動在一定釋放壓以下開啓，或在一定釋放 設定壓力以上不能開啓釋放之誤動作。 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 若壓縮室“8之壓力上昇非常迅速時，如第5圖所示 ，壓油流入檐導室421内之流悬非常大，故可忽略因壓油 從孔口 4 2 2釋放至閥室4 0 9所造成之減饜，壓縮室408之 内壓施加於全部楢導閥面417,使得描導閥元件412迅速 的移動至壓縮室408之相反倒。在此同時，如第6圖所示 ，壓縮室4G8之内壓亦施加於主閥元件410之全部傾斜部 414,使主閥元件410迅速的移動至壓縮室408側，瞬時 的開啓主閥孔418。當然止回閥422因上游室428側與下 游側425侧之内睡之差壓而開啓，故由於主閥孔418之瞬 間開啓，止回闕423不會妨礙壓油從負荷回路至回油通路 之大流量釋放，可瞬時的消除過負荷狀態。 當大量壓油被釋放時，檢澜主閥元件410之開閥動作 -2 2- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 經濟部中央標準局員工消費合作杜印製 A7 B7 五、發明説明（20 ) 而停止油壓泵402之動作，同時停止沖壓機之動作而防止 重複發生過負荷。 由於油壓鎖定下游室425之内壓成為接近最高負荷時 之内壓之高壓。故在下一値沖壓過程時，封閉於負荷回路 内之油量減少相當於下游室425内之油量，而在施加最高 負荷時，上游室428之内壓變成稍高於上次之最大壓力。 因此，重複的進行沖®加工後，下游室425之内壓漸上昇 ，可能影響發生過負荷時之釋放閥401之想應性。 因此，本實施例中，為了解決該問題，在止回閥423 ，主閥元件410與灌導閥元件412間設置内部油路，亦即 將較下游室425之止回閥元件426更下游側部分經由閥室 409連通於回流口 407之復置油路429,開閉該復置油路 429之復置閥430,及使復置閥430連動於沖機之動作 開閉之復置操作裝置431。 換言之，當各循環之沖歷加工完成而承塊上昇時，復 置閥430只開啓一短暫時間而下游室425之内饜降低至閥 室409之®力相同之壓力，因而開啓止回閥423並且解除 油壓鎖定，使下游室425及較楢導閥座416更上游拥之内 壓恢復至與上游室428之壓力相同之β力預負荷壓力。 在油壓鎖定解除後，負荷回路之壓油缓慢減少，可能 使上游室428及下游室425之内壓變成低於預負荷暖力。 但此時，油壓泵412自動的再開始動作而在上游室428及 下游室425内補充壓油，將上游室428及下游室425之内 壓恢復預負荷壓力，故毫無問題。 -2 3- 本紙張尺度逋用中國國家標率（CNS〉A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁)I The safety valve opens when the internal pressure of the hydraulic circuit exceeds a certain value, releases the compressed oil in the oil sump circuit into the safety oil circuit, and restores the pressure in the hydraulic circuit to a certain value, which is used to set the oil The supply oil pressure of the pressure circuit, or rush should be in the overload safety device. Section 7_ indicates the design process of the load-bearing safety device for stamping. The operating oil is sucked into the hydraulic pump 503 from the oil tank 501 through the oil supply path 502, and the compressed oil is supplied to the slider 507 provided on the press machine 506 through the load circuit 505 provided with the check valve 504. The hydraulic cylinder 508 inside is filled with the hydraulic cylinder 508 to ensure the size of the grade pad. The punch 506 drives the slider 507 with the crank mechanism 550 to make it move vertically for a certain size of stroke, and The mold 5 5 2 set on the slide 5 0 7 or the bearing block 5 5 1 processes the work piece 553. However, if the stroke range height of the sliding member 507 of the punching machine 506 is improperly adjusted to cause the punching machine to drop abnormally, or the working piece 5 5 3 with a very thick thickness is inserted, the sliding piece 507 or Qi Qi 5 5 2 is engaged The work piece on the bearing block 551 becomes overloaded. However, the increased oil from the oil SH 508 is discharged from the safety valve 509 connected to the load circuit 505 through the safety oil path 510 W into the oil tank 501, so that the hydraulic pressure cylinder 508 is retracted only by the size of the balance pad, so that the slider 507 The center of the bottom dead center can be used to prevent the load from occurring and protect the chess set 552 and the punch 506. -4- This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) (please read the precautions on the back before filling this page). Outfit. Ordered by the Central Bureau of Standards of the Ministry of Economic Affairs of the Ministry of Economic Cooperation and Consumer Affairs Du Printed A7 _B7_ V. Description of the invention (2) Hydraulic pump 5 0 3 Common use When the internal force of the load circuit 5 05 and the hydraulic national simplified 508 exceeds a certain value, it automatically stops , And when the internal pressure is lower than a certain value, it automatically restarts. As shown in FIG. 8, the hydraulic pump 503 and the safety valve 509 form a connection. The safety valve 509 is like a large flow release that can absorb overload, and a small flow release method that can compensate for the temperature rise of the pressurized oil. One of the safety valves 509's guiyi 511 is provided with a suction port 512 for introducing pressurized oil into the hydraulic pump 503, a load port 513 connected to the load circuit 505, and a return port 514 connected to the release circuit. A compression chamber 515 connected to the check valve 504 and the load port 513 is formed on the valve housing 511, a valve chamber 516 concentrically connected to the other end of the compression chamber 515 and entangled with the return port 514, and concentrically connected The pressure setting chamber 530 in the valve chamber 516. The main valve element 517 is inserted into the valve chamber 516 movably in the direction of the common car center of the valve chamber 516, and a guide sleeve 531 which becomes a stepped cylindrical shape is connected to the main valve element 517 slidably embedded in The pressure setting chamber 530. An oil through hole 518 is formed in the center portion of the main M element 5117, and the eaves guide element 519 is inserted into the hole movably in the axial direction of the main valve element 517. As shown in the 9th to 12th circles, the oil through hole 518 has many holes with different diameters, and the hole is provided from the compression chamber 515 concentrically according to the flow and has a small diameter portion 5 2 0 and a gradually increasing diameter inclined portion 521 , And the large-diameter portion 5 2 2, and the connecting portion of the small-diameter portion 520 of the oil through hole 518 and the inclined portion 521 is provided with a pilot valve seat 523. The large diameter portion 522 of the oil through hole 518 is provided with a main valve hole 525 which communicates with the valve chamber 516 portion of the outer periphery of the main valve element 517. The size of this paper is suitable for China National Standard (CNS & Α4 specifications (210Χ297mm) (please read the precautions on the back before filling in this page) • Binding · Order 305015 A7 B7 __ 5. Description of the invention (3) (please first Read the precautions on the back and fill in this page) The pilot valve element 519 can be inserted into the large diameter portion 522 of the oil through hole 518 or the guide seat 523 freely in the direction of the axis of the oil through hole 518. The end of the valve element 519 on the compression chamber 515 side is formed with a pilot valve surface 5 2 4 formed by the inclined surface facing the inclined portion 521 and the pilot valve seat 523. The full length of the peripheral surface 544 of the pilot element 519 Can contact the large-diameter portion 522 movably, when the distance between the pilot valve surface 524 and the pilot valve seat 523 exceeds a certain value, the main valve hole 525 opens, and when the pilot valve surface 524 and the pilot valve When the isolation distance between the seats 523 is less than a certain value, the main valve hole 525 is closed. As shown in the eighth country, the guide sleeve 531 embedded in the pressure setting chamber 530 has an oil through hole 518 connected to the main valve element 517 The hollow part, and the spring support seat 5 48 can move forwards and backwards in the direction of the axis of the pressure setting chamber 530 It is located in the hollow part, and there is a connecting rod 533 in the spring support seat 548. It is printed by the Beigong Consumer Cooperative of the Central Standard Falcon Bureau of the Ministry of Economic Affairs and is rotatably connected on the support seat. The adjusting bolt 5 3 4 in the end wall 5 3 8 of the valve cover 511. Rotating the setting bolt 534 can make the spring support seat 548 move forward and backward in the pressure setting chamber 530 by the connection guard 533. The fixing bolt is used to adjust The bolt 534 is fixed to the valve 511 to fix the position of the spring support seat 548. On the pilot valve element 519, a center hole 545 is provided along the center of the shaft, and the shaft-shaped bracket 527 protruding from the spring support seat 548 The front end portion can be inserted into the center hole 5 4 5. As shown in the ninth to twelfth, a stepped enlarged head 541 is provided at the front end of the bracket 527. Outside the head 541 is fixed an O-shaped base The paper scale applies the Chinese National Standard (CNS) Α4 specification (210Χ297 mm). The A7 B7_____ is printed by the Beigong Consumer Cooperative of the Central Bureau of Economic Affairs of the Ministry of Economic Affairs. 5. Description of the Invention (4) and the closing member 54 of the backup ring 54 2. Expand the suspect The pressure chamber 515 of the central hole 545 of the pilot valve element 519 makes It becomes a stepped shape to form the auxiliary valve chamber 5 3 6. Insert the auxiliary valve element 5 3 7, the closing member 542, which can be fixed in the auxiliary valve chamber 5 3 6 and fixed to the front of the bracket 5 2 7 outside, and can be moved forward and backward freely 543. The center hole 545 of the auxiliary valve element 537 is composed of many holes with different diameters. The end surface of the head 548 of the pressure setting chamber 530 «bears the stepped surface 5 5 4 to prevent the auxiliary valve element 5 3 7 Slide from the bracket to the compression chamber side. By closing the closing member 542 to the inner peripheral surface of the central hole 545, the gap between the auxiliary valve element 5 3 7 and the bracket 5 2 7 can be closed. The sub-valve element 537 includes a barrel surface 556 which is internally slidingly connected to the sub-valve chamber 536, and a conical sub-valve surface 557 which is connected to the pressure setting chamber 530 side. By making the auxiliary valve seat 546 formed in the auxiliary valve chamber 536 contact or separate from the compression chamber 515, the gap between the auxiliary valve element 537 and the guide element 519 can be opened and closed by means of a poppet. As shown in circle 9, when the pressure inside the compression chamber 515 should be lower than a certain pressure, the internal pressure moves to the pressure chamber 515, and when the supporting end surface 550 leaves the end surface 549 inside the valve, it broadcasts on the bracket 527. Between the pilot valve elements 519, the end surface 555 of the head 541 of the bracket 5 2 7 pushes the secondary valve surface 557 of the secondary valve element 537 through the stepped surface 554 to close it on the secondary valve seat 546 of the eaves pilot valve element 519, and at the same time, As shown in the 10th to 12th plaques, when the internal pressure of the compression chamber 515 exceeds a certain pressure value, the internal pressure moves to the B-force setting chamber 530, and when the end face 550 of the bracket contacts the end face inside the valve, the bracket Between 527 and the guide valve element 519, there is a "Guide to paper standard for the guide valve element 519, which is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) (Please read the precautions on the back before filling in this Page) Binding · Order A7 B7 printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Description of the invention (5) The valve surface 524 is pushed against the pilot valve seat 523 of the main valve element 517, or is spring-pressed on the pilot valve seat 5 2 3 | Zhidong Dong's support spring 5 2 6 a. As shown in drawings 9 to 12, a pressure setting swing spring 52Sb is provided between the swing spring support 548 and the pilot valve element 519 to push the guide valve surface 5 24 of the eave guide element 519 to the main valve element 517 "Pilot valve seat 523, and press it against the pilot valve seat 523 side." The main valve element 517 and the eaves guide valve element 519 and the pressure setting spring 526b move to the side of the compression chamber 515 when the pressure in the compression chamber 515 is lower than a certain warm force, and the central end surface 540 of the main valve element returns to the valve housing to contact the inverted end surface 539, restricting its movement to the warming and shrinking room 515, and when the stress in the sleeping and shrinking room 515 exceeds a certain pressure value, it moves to the pressure setting room 530 due to the internal pressure of the compression room 515 facing the pressure setting spring 526b. The main valve element 517 has a guide sleeve 531 connected to the center end surface 547 of Langyi. The pilot valve element 519 has a support end surface 550 connected to the inner end surface of the valve housing to restrict its movement to the pressure setting chamber 530 side. When the internal pressure of the compression chamber 515 is lower than a certain pressure value and the main valve element 517 and the guide valve element 519 move to the compression chamber 515, the auxiliary valve surface 557 of the auxiliary valve element 537 is pushed by the elastic force of the supporting spring 526a and closes the guide The secondary valve seat 546 of the valve element 519. When the internal pressure of the compression chamber 515 exceeds a certain pressure value, each member moves to the pressure setting chamber 530 side, and the supporting end surface 550 is connected to the inner end surface 549 of the valve housing. When restricting its movement to the pressure setting chamber 530 period I, the I end surface 551 of the compression chamber 515 of the auxiliary valve element 537 is subjected to the internal pressure of the compression chamber 515 exceeding a certain pressure value, generating thrust toward the pressure setting chamber 530 side, the auxiliary valve The surface of the secondary valve of the component is pushed and closed by 557 "Guide-8 ~ This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) (please read the precautions on the back before filling in this page). Pack and order A7 B7 305015 V. Description of the invention (6) The auxiliary valve seat 546 of the valve element 519. (Please read the precautions on the back before filling in this page) As shown in Figures 9 to 12, there is a guide chamber between the inclined portion 521 of the main valve element 517 and the broadcast guide valve surface 524 of the tear guide valve element 519 528, and the main valve element 517 is provided with an orifice 529 connecting the last guide chamber 528 and the valve chamber 516 on the outer surface of the main valve element 517. When itching and pushing, the internal pressure of the compression chamber 515 is maintained at atmospheric pressure (pressure is 0). At this time, as shown in Fig. 9, the main valve element 517 is moved to the position closest to the compression chamber 515 «, and the pilot valve element 519 is urged by the pressure setting spring 526b to the position received by the eave pilot valve seat 523. In order to prepare for the pushing operation, the hydraulic pump 503 is started. When the internal pressure of the compression chamber 515 exceeds a certain pressure value, the main valve element 517 and the pilot valve element 519 resist the elastic force of the force setting spring 526b due to the internal pressure of the compression chamber 515 to move to the pressure setting chamber 530 side. As shown in FIG. 10, the guide sleeve 531 is received by the center end surface 547 of the valve housing 511, and restricts the main valve element 517 from moving to the pressure setting chamber 530 side. In addition, the bracket end surface 550 contacts the inner end surface 549 of the valve housing, and the pilot valve element 519 pushes the last pilot valve surface 524 against the last pilot valve seat 523 of the main valve element 517 due to the swing pressure of the support spring 526a and the pressure setting spring 526b And close it. Printed by the Employee Consumer Cooperative of the Central Bureau of Standards and Economics When the internal pressure of the compression chamber 515 reaches the preload pressure, the hydraulic pump 503 stops. At this time, the support spring 526a can ensure the minimum reference value of the release pressure (for example, 2 MPa), and rotating the adjusting bolt 534 can change the pressure setting swing force of the swing spring 526b, and can release the pressure setting range above the minimum reference value. Bin (for example 2 ~ 3. 5 HPa) Adjust the set pressure. Because the contact between the end face 550 of the bracket and the inner end face 549 of the valve is allowed, -9- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (2 丨 OX297mm) A7 E_Five printed by the Employee Consumer Cooperative of the Central Economic Bureau 3. Description of the invention (7) Eliminate the influence of the internal pressure on the pressure area of the end face formed by the head 541 of the bracket 527 and the auxiliary valve element 537 on the heat shrinkable chamber 515, therefore, the pilot valve element 519 is in Between the auxiliary valve chamber 536 of the pilot valve element 519 and the main pilot valve seat 523 of the main valve element 517, the internal pressure of the sleeping and shrinking chamber 515 having a small cake-shaped pressure surface is received, so the resistance to the pressure can be reduced Sleeping power, and in order to resist high release pressure (such as Max. 3. 5 MPa), using the small support swing spring 526a and the pressure setting spring 5 2 6 b, the pilot valve surface 524 of the pilot valve element 519 can be pushed onto the pilot valve seat 523 of the main M element 517, or swing ® to the guide valve seat 523 side, which can form a compact safety valve mechanism with low inertia and high-speed resilience. When the internal pressure of the compression chamber 515 reaches the preload pressure and the oil pump 504 stops, in order to set the necessary static pressure of the Anjin pressure, after the load is applied to the slider with the hydraulic jack, the internal pressure of the compression chamber 515 and The increase in load is proportional to the increase, and the compression chamber 515 should be applied to the ring-shaped cake-shaped pressure area of the auxiliary valve seat 546 of the pheasant pilot valve element 519 and the right pilot valve seat 523 of the main valve element 517, and As shown in circle 11, when the thrust generated by the oil pressure is greater than the setting pressure of the support spring 526a and the pressure setting spring 526b, the last pilot valve element 519 leaves the pilot valve seat 523, allowing the compressed oil in the compression chamber 515 to pass through the small diameter The portion 520, the pilot valve seat 523, the pheasant pilot chamber 528, the orifice 529, and the valve chamber 516 flow out from the return port 514. Adjust the adjustment bolt 534 to make the swing spring support 548 advance and retreat in the pressure setting chamber 530, so that the pressure of the oil chamber becomes a certain overload release pressure (such as 3 MPa) when the release oil flows out from the return port 514, and then adjust Support the spring 526a and the pressure setting spring 526b spring pressure, will be adjusted -10- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (2 丨 0 '297mm) (Please read the notes on the back before filling in This page) Order A7 B7 Printed by the consumer cooperation of the Central Bureau of Economic Affairs of the Ministry of Economic Affairs ------- V. Description of the invention (8) • " · 1 I The bolt 534 is fixed to the valve housing 51 1 with a fixed bolt 535 〇1 1 1 At this time • Even if the closing member 54 2 to 1 I is pressed by the pressure of the compression chamber 5 15 to the inner peripheral surface of the sub-m element 537, the pilot valve should be 1 first because of the f The movement of the element 519 and the closed m piece 542 is also slower. »Compression chamber 5 15 Reading back 1 1 The force of m increases very slowly 9 Therefore, the auxiliary valve element 537 is under the pressure of the compression chamber 515 In the state where the injection force of Λ is received by the auxiliary valve seat 546, 9 and the m pilot valve element 519 mean ψ 1 item I moves to the stress setting chamber 530 m. Therefore, the compressed oil does not pass through the pilot valve element from the compression chamber 515 5 1 9 leaked to the pressure setting% with the sub-valve element 537 This page 1 inside the room 53 0> w «· 1 Set the static pressure as described above m 509 Set the dynamic pressure, result 1 1 occurs When overloaded, as shown in paragraphs 11 9 1 2, the closing member 54 2 pressure 1 I pressure of the shrinkage chamber 5 15 is pushed to the inner peripheral surface of the secondary valve element 537, so that 1 is set to move suddenly to the pressure setting The auxiliary valve element 537 held by the chamber 530 is stationary 1 | 0. However, due to the compression knitting oil supplied from the compression chamber 515 to the small gap between the auxiliary valve element 537 and the pilot valve element 1 I 519 supporting the insertion hole 536 Lubrication 1 1 action, wizard The element 519 can move the auxiliary valve element 537 very smoothly. As a result, the difference between the dynamic pressure setting pressure and the static pressure setting pressure becomes about 2% of the static pressure setting 1 1 constant pressure, and at the same time, the dynamic pressure setting pressure also changes Become a big 1 Γ · within about IX. 1 1 *. When the load is normally pushed by m, the pilot valve element 519 opens slightly 1 1 I, and when its pilot valve seat 523 is separated > a large amount of compressed oil flows into the pilot chamber 528 and compressed oil It has a full effect on the surface 524 of the pilot valve, and the open pressure area of the pilot valve element 51 9 is from the auxiliary valve seat 546 and the main ring element 1 1 5 1 7 The ring-shaped small ring is suddenly affected by the m surface. Great changes have taken place, changing 1 1 -11- 1 1 1 This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) Member of the Central Standards Bureau of the Ministry of Economic Affairs. Printed by the industrial and consumer cooperatives A7 B7 V. Description of the invention (9) Form a ring between the auxiliary valve seat 548 and the main valve element 517 to form a large pressure area, creating resistance to support the elastic tube 52 6a and setting the force The large hydraulic thrust of the swing spring 526b immediately moves the pilot valve element 519 to the pressure setting chamber 530, and at the same time, the hydraulic pressure acts on the inclined portion 5 with a large pressure area that can immediately generate a huge opening thrust in the compression chamber 515 On the gold side of 4, the main valve element 517 generates a huge hydraulic opening thrust that quickly moves to the side of the compression chamber 515, so as to resist the internal pressure of the compression chamber 515 when the pilot valve element 519 closes the pilot valve seat 523 The resulting small valve closing thrust in the direction of the pressure setting chamber 530 side of the compression surfaces 515 of the small pressure-receiving area of the main valve element 517 causes the main valve element 517 to fully open quickly. As a result, the main valve element 517 and the pilot valve element 519 bouncing each other and quickly open, the main bore 525 opens immediately. A large amount of compressed oil passes through the main valve hole 525 and is discharged into the threshold chamber 516, which eliminates the load condition. Because the gap between the peripheral surface of the auxiliary valve chamber 536 of the pilot valve element 519 and the auxiliary valve element 537 is small, even when a load occurs and the valve element 537 leaves the auxiliary valve seat 546, due to the limitation of the gap, the The compressed oil is prevented from leaking from the compression chamber 5 15 to the pressure setting chamber 5 3 0 through the gap between the eaves pilot valve element 519 and the auxiliary valve element 5 3 7. After the stamping operation is started and the stamping process starts, the load gradually increases, so the internal pressure of the load circuit 505 and the internal pressure of the hydraulic cylinder 508 increase. As shown in FIGS. Store energy. When the load suddenly disappears due to the completion of the punching, each press quickly releases the energy stored due to the volatile deformation, and attempts to return to the original normal shape to generate a force opposite to the load during the press processing on the press. As a result, the oil pressure -12- This paper scale is applicable to the Chinese National Standard (CNS > A4 specification (210X297mm) (please read the precautions on the back before filling in this page) Printed by the cooperative A7 B7 V. Description of the invention (i〇) The barrel 508 is rapidly extended due to indignation, so that the internal pressure of the load circuit 505 and the internal pressure of the oil cylinder 508 suddenly decrease. When 508 is excessively extended due to inertia, as shown in the 15th circle, the internal pressure of the load circuit 505 becomes a negative pressure lower than the preload pressure of the minimum pressure that the load circuit 505 must maintain, between the maximum and minimum prenegative pressure The pulsation in the fan garden converges to the preload pressure. In addition, due to the static operation of the general hydraulic cylinder or the general hydraulic cylinder that performs the speed change operation at high speed, negative pressure can also be generated, and the internal pressure is between the maximum and minimum. Pulsation within the range between the preload pressure converges to the preload pressure. When the penetration load acts and the internal pressure of the compression chamber 515 becomes negative pressure, the force enters the main valve element 517 of the systolic chamber 515 stage I or Cabinet guide The element 519, and the main element 517 with a large pressure surface is greatly affected by the negative pressure. Therefore, as shown in the twelfth circle, the pilot valve seat 523 may open the pilot valve surface 524 and malfunction. Because the main valve element 517 and the tear guide valve element 519 advance and retreat due to the pulsation of the internal pressure of the compression chamber 515, the closing force between the eave guide valve element 519 and the guide valve seat 523 becomes uncertain, and although the result is not in a loaded state, but Malfunction occurs as shown in Figure 12. The present invention was developed in view of the above-mentioned problems. Its purpose is to provide a high-speed high-flow safety valve that can prevent the sticking action caused by penetration or swell The misoperation caused by the minimum pressure that the load circuit must maintain originally. Another object of the present invention is to provide an action that can still make the safety valve spike according to the occurrence of high and low pulsating pressure, and form a zero mechanical state (When the machine-13- This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X 297mm) (please read the precautions on the back before filling in this page) Binding-Order A7 3〇5〇15 B7 5. Description of the invention (11) (please first Read the precautions on the back and fill in this page) The energy stored in the machine at the time of stopping becomes a state of zero) As a safety valve with a design idea in recent years = a state of safety design idea. In order to achieve the above purpose, the present invention is like a Equipped with a load port that is connected to the load circuit, a return port connected to the oil return path, and a valve that connects the negative oil port and the internal oil path of the return port, and the internal force of the chief load circuit becomes higher than a certain value. When the oil circuit is opened and the pressure of the load circuit becomes lower than a certain value, the safety valve of the safety valve component of the internal oil circuit is closed. The special feature is: the part of the internal oil circuit between the load port and the safety valve component is provided with a slave valve Check valve on the component side back to the load port period I. Due to this structure, when the pressure in the load circuit becomes negative pressure, the check valve is closed, and the oil pressure lock is implemented to prevent the safety valve element from rushing into the load port I. In the present invention, if there is a reset oil passage that connects the part of the internal oil passage between the check valve and the safety valve element to the return port, and the valve is opened after the reset oil passage is opened and closed, the small opening of the reset valve opens , The internal oil passage between the check valve and the safety valve element is connected to the return port by a reset oil passage, and the hydraulic lock can be released, and the load change is repeated to reduce the gradual increase due to the hydraulic lock The pressure between the return valve and the safety valve element resets the compressed oil at the load port. Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. In addition, the full opening of the reset valve can be used to connect the part of the internal oil path between the check valve and the safety valve element to the return port with the reset oil path to release the oil pressure. Locking, at the same time, after the internal pressure between the check valve and the safety valve element is selectively released to atmospheric pressure, the internal pressure of the load port is released to atmospheric pressure. The embodiments of the present invention will be described below with reference to the drawings. As shown in Figure 1, the safety valve according to an embodiment of the present invention is applied to the punch-14- 呓 paper standard applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs B7_ V. Description of the invention (12) Overload safety device of the press. The safety valve 401 is integrated with the hydraulic pump 402. On one side of the valve housing 404 of the safety valve 401, a suction port 405 for introducing pressurized oil into the hydraulic pump 402, a load port 406 connected to the load circuit, and a return port 407 connected to the release circuit are provided. Inside the valve 404, there is formed a compression chamber 408 that communicates with the discharge valve 403 of the hydraulic pump 402 and the load port 406, and a valve chamber that is concentrically connected to the compression chamber 408 and communicates with the return port 407 409, and a pressure setting chamber 4 3 2 which is concentrically connected to the valve chamber 409. The stepped cylindrical main valve element 410 is slidably inserted into the valve chamber 409 toward the axis, and the stepped cylindrical guide sleeve 433 coupled to the main valve element is slidably fixed to the pressure setting chamber Within 432. In addition, the pilot valve element 412 can be inserted into the center portion of the main valve element 410 and the oil through hole 411 formed in the center of the main valve element 410 so as to be able to advance and retreat toward the axial direction of the main valve element 410. As shown in Figs. 2 to 6, the oil through holes 411 are concentrically formed from the pressure chamber 408 by a small-diameter portion 413 having a different diameter, an inclined portion 414 whose diameter gradually increases, and a large-diameter portion 415. At the connecting portion of the small diameter portion 413 and the inclined portion 414, a last pilot valve seat 416 which is separated from the cabinet pilot valve element 412 is formed. The pilot valve element 412 is slidably fixed in the large-diameter portion 415, and a pilot valve surface 417 including an inclined portion 414 and a resisting pilot valve seat 416 is formed on the compression chamber 408 side. Allowable oil through hole -15 is formed on the large diameter portion 415 of the main valve element 410- This paper size is applicable to China National Falcon (CNS) A4 specification (210X297mm) (Please read the precautions on the back before filling this page ) A7 B7 printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. 5. Description of the invention (13) 411 is entangled with the main valve element 418 of the valve chamber 409 on the external surface of the main valve element 410. The peripheral surface 419 of the main valve element 412 contacts the inside of the large-diameter portion 415 slidably throughout. When the distance between it and the pilot valve seat 416 of the pilot valve surface 417 exceeds a certain value, the main valve hole 418 opens, and when the distance between it and the pilot valve seat 416 of the pilot valve surface 417 is less than a certain value , The main valve hole 418 is closed. As shown in Nos. 1 and 6, the guide sleeve 433 fixed in the pressure setting chamber 432 has a hollow portion connected to the oil through hole 411 of the main valve element 410. In this hollow part, there is a spring support seat 4 3 4 which can move forwards and backwards toward the pressure setting chamber 432, and the connection link 4 3 6 is fixed in the swing spring support seat 4 34, and the rotatable Da knot can be oriented The end wall of Valve Yi 04 04 can be inserted into and out of bolt 437. Rotating the adjusting bolt 437 can make the spring support 434 move forward and backward in the pressure setting chamber 432 through the connection guard 436. The fixing bolt 438 can be used to adjust the entire screw 437 It is fixed on the valve 404, and can fix the position of the spring support seat 34. On the pilot valve element 412, a central hole 439 is formed along the axis, and the front end of the shaft bracket 440 protruding from the spring support seat 434 is formed. Inserted into the center 4 3 9 0 0 As shown in the second to 6th, the front end of the bracket 440 is formed with a stepped expansion head 441, and the outer side of the head 441 is fixed including 0 type Chen and backup Chen 44 3 The closing member 4 4 2. The side of the compression chamber 408 of the central hole 439 of the last pilot valve element 412 is stretched into a step shape, so that a secondary valve chamber 444 can be formed, and the secondary valve chamber 444 is inserted and fixed outside the front end of the bracket The secondary valve element 445, the closing member 44 2, and a 16 _ the paper The standard is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (please read the precautions on the back before filling out this page) Binding-Order A7 Β7 printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of invention ( 14) The backup ring 44 can be moved forward and backward freely. The central hole 446 of the auxiliary valve element 445 has many holes with different diameters. The stepped surface 447 is received by the surface 448 of the head 441 on the side of the pressure setting chamber 432, which prevents the sub-valve element 445 from moving away from the bracket 440 to the pressure chamber 408, allowing the closing member 442 to adhere tightly to the center hole 446 The inner peripheral surface can close the gap between the auxiliary valve element 445 and the bracket 440. The auxiliary valve element 445 includes a cylinder surface 449 slidably contacting the inside of the auxiliary valve chamber 444 and a tapered auxiliary valve surface 450 connected to the pressure setting chamber 432 side. The auxiliary seat 451 formed in the auxiliary valve chamber 444 is separated from the compression chamber 408, and the empty space between the auxiliary valve element 445 and the eave guide element 412 can be opened and closed by the lift bar. As shown in the second circle, when the pressure in the compression chamber 408 is lower than a certain force value, the internal pressure moves to the side of the compression chamber 408. When the bracket end surface 452 is separated from the inner end surface 453 of the valve housing, between the bracket 440 and the pilot valve element 412, the end surface 448 of the head 441 of the bracket 440 passes the stepped surface 447 of the auxiliary valve element 445 to the auxiliary valve element 445 The auxiliary valve surface 450 pushes against the auxiliary valve seat 450 of the pilot valve element 412 and closes it. At the same time, as shown in the third to sixth circles, when the internal pressure of the compression chamber 408 exceeds a certain pressure, the internal pressure moves to The pressure setting chamber 432 side. When the end face 452 of the bracket is connected to the end face 453 on the inner side of the valve housing, a supporting swing spring 420a is provided between the bracket 440 and the last pilot valve element 412 so as to generate pressure to push the «guide surface 417 of the eave pilot valve element 412 to the main The valve chamber 410's last pilot valve seat 416. In addition, as shown in Figures 1 to 6, in the sickle support seat 434, period I guide -17- This paper scale applies to the Chinese National Standard Falcon (CNS) A4 specification (210'X297mm) ------ -: --- installed-- (please read the precautions on the back before filling in this page) Order ^ 05015 A7 B7 5. Description of the invention (15) There is a guide between the valve elements 412 to generate the eaves guide valve element 412 The valve face 417 is pushed to the pickle seat 416 of the main valve element 410 and swung to the support spring 4 2 0 b of the last pilot valve seat 416. When the internal pressure of the compression chamber 408 is less than a certain value, the main valve element 410 and the pilot valve element 412 are pushed by the pressure setting spring 420b to move to the compression chamber 408 side. The central end surface 454 of the main valve element returns to the valve housing and contacts the side end surface 455, is restricted to move to the compression chamber 408, and when the internal pressure of the compression chamber 408 exceeds a certain stress value, it moves to the pressure setting chamber 432 side due to the internal pressure of the compression chamber 408 resisting the elastic force of the pressure setting spring 4 20b , The guide sleeve 433 of the main valve element 410 contacts the central end face 456 of the valve, and the support end face 452 of the last guide element 412 contacts the inner end face 453 of the valve housing, which is restricted from moving to the pressure setting chamber 4 3 2 side. When the internal pressure of the pressure-setting chamber 408 is less than a certain pressure value and the pilot valve element 412 moves to the compression chamber 408 side, the secondary valve surface 451 of the secondary valve element 445 pushes the pilot valve element 412 with the elastic force of the supporting spring 420a The secondary valve seat 450 is closed, and when the internal pressure of the compression chamber 408 exceeds a certain pressure value, it moves to the squall force setting chamber 432 — and the supporting end surface 452 contacts the valve housing 4 5 3. When the movement to the side of the pressure setting chamber 4 3 2 is limited, the narrow end face 457 of the K-shrinkage chamber 408 of the auxiliary valve element 445 withstands the internal pressure of the Knitting chamber 408 exceeding a certain pressure value, and the pressure setting is generated. With the thrust force from the chamber 432 side, the auxiliary valve surface 450 of the auxiliary valve element 445 pushes the auxiliary valve seat 451 of the pilot valve element 412 and closes it. As shown in Figures 2 to 6, there is a tracing chamber 421 between the inclined portion 414 of the main valve element 410 and the guide valve surface 417 of the eaves guide valve element 412, and this paper size is applicable to the Chinese national standard ( CNS) A4 specification (210X297 Gongmai) -------: --- installed-- (please read the precautions on the back and then fill out this page) Order the Ministry of Economic Affairs Central Bureau of Prospects and Staff Employee Consumer Cooperation to print the economy A7 B7_ printed by the Beigong Consumer Cooperative of the Central Standards Bureau of the Ministry of Education. 5. Description of the invention (16) A part of the pedestal 409 on the outer surface of the main valve element 410 is formed on the main M element 410.之 孔口 422. In addition, in the first to sixth circles, the compression chamber 408 is provided with a stop which closes when the internal pressure of the load circuit falls below the preload pressure and prevents the internal pressure of the load circuit from flowing back from the valve chamber 490 side to the backflow of the load Return valve 423. As shown in FIGS. 2 to 6, the check valve 423 has a check valve seat 424 protruding into an inner forehead in the middle of the axial direction of the compression chamber 408, and the compression chamber 408 is divided into upstream by the check valve seat 424 Room 428 and downstream room 425. The check valve 423 includes a check valve element 426 fixed in the downstream chamber 425 which can slide toward the axis of the shrinkable chamber 408, and is provided in the downstream chamber 425 to urge the check valve element 426 to the direction of the check valve seat 424 The check thin spring 4 2 7 〇When the stamping is stopped, as shown in the second reed, within the compression chamber 408 ® maintains the atmospheric pressure (pressure: 〇), the main valve element 410 is moved to the position closest to the compression chamber 408 side , And the pilot valve element 412 is swayed by the pressure setting swing spring 420b to the position received by the guide valve seat 416, and the check valve element 426 is pushed against the check valve seat due to the swing force of the check spring 427 After starting the hydraulic pump 402 for pressing in 424, when the internal pressure of the compression chamber 408 exceeds a certain value, the check valve element 426 is pushed by the differential pressure between the internal pressure of the upstream chamber 428 and the internal pressure of the downstream chamber 425 Opening the check valve 423 toward the valve chamber 409 side, the main valve element 410 and the eaves guide valve element 412 move to the pressure setting chamber 433 and at the same time resist the sway of the pressure setting spring 420b due to the internal pressure of the compression chamber 408 and guide The sleeve 433 is received by the center end face 456 of the valve housing 404, thus restricting the main valve element 41 0 Move to the 432 side of the force setting room. -1 9- The paper size is applicable to the Chinese National Standard Falcon (CNS) A4 specification (210X297mm) (Please read the precautions on the back before filling this page) A7 B7 printed by the Ministry of Standards and Staff ’s Consumer Cooperative V. Description of the invention (17) In addition, the supporting end face 452 contacts the inner end face 453 of the valve housing, and the flap pilot valve element 412 is replaced by the support spring 420a and pressure setting spring 420 The guide surface 417 is pushed toward the last guide valve seat 416 of the main valve element 410. When the internal pressure of the compression chamber 408 reaches the preload pressure, the hydraulic pump 402 stops as shown in the fourth circle. At this time, the support spring 420a keeps Raise the minimum reference value of the pressure (eg 2 MPa), so you can turn the adjustment bolt 437 to change the spring force of the pressure setting spring 420b, adjust the release pressure setting range (eg 2 ~ 3. 5 MPa) pressure setting. Making the supporting end surface 452 contact the inner end surface 453 of the valve housing can eliminate the influence of the pressure formed by the head 441 of the bracket 440 and the auxiliary valve element 445 on the end surfaces of the compression chamber 408 and the internal pressure of the compression chamber 408 on the fan, and The pilot valve element 412 is described as a ring cake ring-shaped swash force formed between the auxiliary valve seat 451 of the pilot valve element 412 and the rim pilot valve seat 416 of the main valve element 410 to accept the internal pressure of the compression chamber 408, so Reduce the spring pressure that resists the pressure, and in order to resist the high release pressure (for example, a maximum of 3. 5 MPa), using the small bracket spring 420a and the pressure setting swing spring 420, you can push the pilot valve surface 417 of the pilot valve element 412 against the pilot valve seat 416 of the main valve element 410, or swing to the pilot On the valve seat 416 side, a compact release valve mechanism with low inertia and high tracing speed can be formed. When the internal pressure of the weaving chamber 408 reaches the preload pressure, the action of the oil mole pump 402 is automatically stopped. Then, if the internal pressure of the compression chamber 408 becomes lower than a certain preload pressure, the hydraulic pump 402 automatically starts and will The internal pressure of the constriction chamber 408 is restored to a certain preload negative pressure. After starting the stamping operation, the load increases when the slider contacts the work piece. -2 0- The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) (please read the precautions on the back before filling this page) Binding · Order A7 B7 Printed by the Employees' Consumer Cooperative of the Central Prototype Bureau of the Ministry of Economic Affairs 5. Description of the invention (18) The compression chamber 408 is designed to respond to the increase in load and increase its internal pressure from the preload. When the oil temperature rises or an overload occurs, the internal pressure of the compression chamber 408 increases in proportion to the increase in load, while the internal pressure of the compression chamber 408 is applied to the auxiliary valve seat 451 and the main valve element 410 of the eaves pilot valve element 412 The ring-shaped pressure zone of the doughnut between the pilot valve seats 416. As shown in FIG. 5, if the thrust of the hydraulic pressure exceeds the setting pressure of the bracket spring 420a and the pressure setting spring 420b, the pilot valve element 412 is separated from the last pilot valve seat 416, so that the compressed oil in the compression chamber 408 passes through the small diameter The portion 413, the cup guide valve seat 416, the eave guide chamber 421, the gong port 422, and the thief chamber 409 flow out from the return port 407. For example, if the temperature of the condensate oil rises and the pressure rises, so that the stress of the compression chamber 408 rises slowly, if the distance between the eaves pilot valve surface 417 and the last pilot valve seat 416 is still small, it flows from the compression chamber 408 to the eaves The flow rate of the pilot chamber 421 is still small. Since the pressure released from the orifice 4 2 2 to the valve chamber 409 causes the internal pressure of the right pilot chamber 421 and the compression chamber 408 to fall below the selective discharge set pressure, it is not necessary to open the main valve The hole 418 can push the broadcast guide element 412 to support the spring 420a and the pressure setting spring 420b to the last pilot valve seat 416. If the heating is performed under a specific capacity and the load suddenly disappears after the completion of the punching, each press is elastically deformed due to the pressurization, and the stored energy is quickly released to restore the original shape. Therefore, the force in the opposite direction to the load at the time of stamping is generated, and the hydraulic cylinder 508 is excessively elongated due to the stun nature of the slider 507, etc., and the negative pressure is lower than the preload pressure of the lowest pressure that the load circuit 505 needs to hold. The internal pressure of the load circuit 505 pulsates above and below the preload pressure to converge to the preload pressure, and due to the sticking action of the general hydraulic cylinder and the general hydraulic pressure cylinder operating at high speed, the same The paper standard is applicable to the Chinese National Standard (CNS) A4 specification (210X29? Mm) nn ^^^ 1 ^^^ 1 ^^^ 1 «Li I —I · (please read the precautions on the back before filling in this page) 3 ^ 5U5 A7 B7 V. Description of the invention (19) It becomes negative pressure due to the stagnation, pulsates above and below the preload pressure and converges to the preload pressure, when the internal pressure of the upstream chamber 428 drops below the preload pressure, such as As shown in the fourth circle, the check valve element 426 is pushed to the check valve seat 424 by the differential pressure of the oil pressure applied to the check spring 427 and the check valve element 426 to generate the oil pressure lock, thereby preventing The pressure on the downstream chamber 425 side drops below the preload pressure. As a result, it is possible to prevent the main valve element 10 and the pilot valve element 412 from being subjected to negative pressure to rush into the compression chamber 4D8 side, or to vibrate due to the upward and downward movement of the oil pressure generated by the preload pressure of the upstream chamber 428. As a result, the vibration of the release valve caused by the pulsation of the oil pressure caused by the sticking action of the oil painting cylinder for the load and overload detection can be prevented from opening below a certain release pressure, or cannot be released above a certain release set pressure Malfunction. Printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling in this page) If the pressure in the compression chamber "8 rises very quickly, as shown in Figure 5, pressurized oil flows into the eaves guide chamber 421 The flow hang is very large, so the reduction caused by the release of pressure oil from the orifice 4 2 2 to the valve chamber 4 0 9 can be ignored. The internal pressure of the compression chamber 408 is applied to all the pilot valve surfaces 417, making the pilot valve The element 412 quickly moves to the opposite direction of the compression chamber 408. At the same time, as shown in Figure 6, the internal pressure of the compression chamber 4G8 is also applied to all the inclined portions 414 of the main valve element 410, so that the main valve element 410 quickly Moving to the compression chamber 408 side, the main valve hole 418 is instantaneously opened. Of course, the check valve 422 is opened due to the differential pressure between the upstream chamber 428 side and the downstream side 425 side, so the instantaneous opening of the main valve hole 418 stops Return 423 does not prevent the large flow of pressure oil from the load circuit to the return path, and can instantly eliminate the overload condition. When a large amount of pressure oil is released, the valve opening action of the main valve element 410 is checked-2 2- This paper scale is applicable to China National Standard (CNS) A4 specification (210X297 ) The Ministry of Economic Affairs, Central Standards Bureau, employee cooperation cooperation printed A7 B7 V. Description of the invention (20) Stop the operation of the hydraulic pump 402, and at the same time stop the operation of the punching machine to prevent repeated overload. The downstream chamber 425 is locked due to the hydraulic pressure The internal pressure becomes a high pressure close to the internal pressure at the highest load. Therefore, during the next stamping process, the amount of oil enclosed in the load circuit decreases by the amount of oil in the downstream chamber 425, and when the highest load is applied, the upstream chamber The internal pressure of 428 becomes slightly higher than the previous maximum pressure. Therefore, after repeated punching ® processing, the internal pressure of the downstream chamber 425 gradually rises, which may affect the desirability of the relief valve 401 when overload occurs. Therefore, In this embodiment, in order to solve this problem, an internal oil passage is provided between the check valve 423, the main valve element 410 and the priming valve element 412, that is, the portion downstream of the check valve element 426 of the downstream chamber 425 passes through the valve The chamber 409 communicates with the reset oil passage 429 of the return port 407, opens and closes the reset valve 430 of the reset oil passage 429, and the reset operation device 431 that links the reset valve 430 to the action of the punch to open and close. In other words, when each When the processing of the ring is completed and the block rises, the reset valve 430 only opens for a short period of time and the pressure in the downstream chamber 425 decreases to the same pressure as the valve chamber 409, thus opening the check valve 423 and releasing the oil pressure Locking, the internal pressure of the downstream chamber 425 and the upstream of the pilot valve seat 416 is restored to the β-force preload pressure that is the same as the pressure of the upstream chamber 428. After the oil pressure lock is released, the pressure oil in the load circuit slowly decreases, The internal pressure of the upstream chamber 428 and the downstream chamber 425 may become lower than the preload warming force. However, at this time, the hydraulic pump 412 automatically restarts to replenish pressurized oil in the upstream chamber 428 and the downstream chamber 425 to change the upstream chamber The internal pressure of 428 and downstream chamber 425 restores the preload pressure, so there is no problem. -2 3- This paper scale uses the Chinese national standard rate (CNS> A4 specification (210X297mm) (Please read the precautions on the back before filling this page)
.1T 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（21) 因為復置閥430之全開，以復罨油路429將止回閥 423,主閥元件410與楢導閥元件412間之内部油路，亦 即較下游室425之止回閥元件426更下游之部分經由閥室 409連通至回流口 407,薙此解除油鼷鎖定，同時，將止 回閥423，主閥元件410與棰導閥元件412間之内壓釋放 至大氣壓力，而連缠的將負荷口 406之内壓_放至大氣壓。 如上所逑，在低於一定容量之條件下因沖壓打穿加工 完成而負荷突然消失之打穿時，沖壓機本鼸因加壓而發生 彈性變形，迅速的釋放儲存之能量，希望恢愎成正常形狀 而在沖壓機上施加與沖壓加工時之負荷相反方向之力量， 結果，因沖壓機之滑件等之懦性作用，使油壓國筒迅速的 過度伸長，負荷回路之内壓變成較本來需要維持於負荷回 路之最低壓之預鱼荷壓力更低之負壓.在預負荷壓力之上 下發生脈動而收斂成預負荷壓力，而由於以高速變速動作 之一般之油壓画筒及一般油壓圏茼之黏住動作，亦同樣的 由於慣性作用而成為負壓，在預負荷壓力之上下發生脈動 而收斂成負荷壓力《但因為本發明之保險两在負荷口與閥 元件間之内部油路部分設有防止壓油從閥元件側倒流至負 荷口側之止画闕，故負荷口侧之壓力降低至過負荷安全装 置之預負荷壓力等本來霈要維持之最低壓力以下之負壓， 在該最低壓力之上下發生脈動時由止回閥施加油壓鎮定， 因此，可防止閥元件因油壓之脈動而産生之振動衝入負荷 口側，在一定之釋放設定壓力以下開啓並釋放而使沖腫機 發生異常停止，或在一定釋放設定壓力以上時閥不能釋放 -24- 本紙張尺度適用中國國家標準（CNS ) Α4規格（21 ΟΧ297公釐） ------ ΙΓ__1.1 __ (請先閲讀背面之注意事項再填寫本頁).1T A7 B7 printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Description of the invention (21) Because the reset valve 430 is fully open, the check valve 423, the main valve element 410 and the last pilot valve element are replaced by the complex oil circuit 429 The internal oil passage between 412, that is, the part further downstream than the check valve element 426 of the downstream chamber 425 communicates with the return port 407 through the valve chamber 409, and the oil valve lock is released, and at the same time, the check valve 423, the main valve The internal pressure between the element 410 and the pilot valve element 412 is released to atmospheric pressure, and the internal pressure of the load port 406 is continuously released to atmospheric pressure. As mentioned above, when the load suddenly disappears due to the completion of the punching process under the condition of a certain capacity, the punch of the punching machine undergoes elastic deformation due to pressurization, quickly releasing the stored energy, hoping to restore it Normal shape, the force in the opposite direction to the load during the stamping process is applied to the punching machine. As a result, due to the cowardly action of the sliding parts of the punching machine, the hydraulic canister is rapidly overextended, and the internal pressure of the load circuit becomes more It is necessary to maintain the pre-fishing pressure at the lowest pressure of the load circuit and the negative pressure is lower. Pulsation occurs above and below the pre-load pressure and converges to the pre-load pressure. Due to the general hydraulic painting cylinder and high-speed variable speed action The sticking action of the hydraulic pressure valve also becomes negative pressure due to inertia, and pulsates above and below the preload pressure to converge to the load pressure. "But because the insurance of the present invention is between the load port and the valve element. The oil circuit is provided with a check valve to prevent the pressure oil from flowing back from the valve element side to the load port side, so the pressure on the load port side is reduced to the preload pressure of the overload safety device Wait for the negative pressure below the minimum pressure to be maintained by the original pressure. When the pulsation occurs above and below the minimum pressure, the check valve applies oil pressure to stabilize it. Therefore, the vibration of the valve element due to the pulsation of the oil pressure can be prevented from entering the load port. On the side, opening and releasing below a certain release set pressure causes the lung machine to stop abnormally, or the valve cannot be released when the certain release pressure is higher than 24. This paper standard is applicable to China National Standard (CNS) Α4 specification (21 ΟΧ297 Mm) ------ ΙΓ__1.1 __ (please read the notes on the back before filling this page)
、1T, 1T
AA
7 B 明説 明發 件 作 Η 入 嚙 具 模 C 及生 件發 滑題 之問 機之 壓體 沖本 ，機 量壓 能沖 壓及 加具 之模 常護 異保 生能 産不 之置部 間復内 件該之 元閉間 閥開件 放及元 釋，閥 與路與 口油口 荷置荷 負後負 將之將 有口路 具流油 若回置 ，於復 中通以 明連則 發分， 本部閥 在之置 其路復 尤油之 部路 内油 荷放 負釋 置與 C 復閥題 而回問 定止之 鎖止性 壓防匾 油可锻 除即之 解，閥 可動放 卽變釋 ，荷轡 口負影 流行而 回進高 於的昇 通復漸 連反逐 分，力 部油壓 之歷之 路之間 油口閥 止口導 將流嚮 室回與 閥於件 由通元 經連閥 路路主 油油 ， 置部閥 復内回 以之止 而間將 開件在 全元時 之閥同 閥導 ， 置嚮定 復與鎖 於件暖 由元油 , 閥除 外主解 此，可 閥即 回 ， 内定 之穩 口為 荷成 負力 將壓 的動 缠脈 連低 -高 後對 力閥 壓放 氣釋 大使 成可 放， 釋力 壓壓 内氣 之大 間成 件放 元釋 閥壓 當 ✓IV 態 狀 0 械.^ 機態 零狀 之之 1 零 之成 想變 思J1 計能 設之 全内 安器 來機 年於 近存 足儲 滿時 可止 時停 同器 ，機 (請先閲讀背面之注意事項再填寫本頁) ---r ► 裝· 訂 經濟部中央標準局員工消費合作社印製 -25- 本紙張尺度適用中國國家標準（CNS〉A4規格（210X297公釐） 經濟部中央標準局員工消費合作社印装 Α7 Β7 五、發明説明（23 ) 圖式之簡單説明 第1圖為本發明一實施例之止回閥開啓時之斷面圖； 第2圖為本發明一實施例之油壓為大氣壓力（〇壓）時 之要部斷面圖； 第3圖為本發明一實施例之産生開啓止回閥之預負荷 壓力時之要部斷面圖； 第4圈為本發明之一實施例之産生預負荷壓力後止回 閥閉合時之要部斷面圖； 第5圖為本發明一實施例之因釋放閥稍開而使止回閥 稍開時之要斷面圖； 第6圖為本發明之一實施例之因釋放閥全開而使止回 閥大開時之要部斷面圖； 第7圖為冲K機之過負荷安全裝置之油壓回路圖； 第8圖為習用裝置之斷面圖； 第9圈為習用装置中油壓為大氣壓力（0颸）時之要部 斷面圈； 第10圖為習用裝置中負荷狀態時之要部斷面圖； 第11圖為習用裝置中釋放閥稍開時之要部斷面圖； 第12圖為習用装置中釋放閥全開時之要部斷面圖； 為13圖為C型沖壓機之彈性簪形倒面圖； 第14圖為直線側型沖壓機之彈性變形之正面圖； 第15圖為油壓/沖壓負荷之變化狀態之園表。 -2 6 - 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） I- n I 1 ΙΓ I l·· (請先閲讀背面之注意事項再填寫本頁)7 B Explain clearly that the hair piece is made into the pressing body of the machine and the sliding problem of the raw parts. The machine can measure the pressure and stamping and add the mold to protect the different parts of the body. When the valve is closed, the valve is opened and released, and the valve and the road and the port are loaded. After the load is negatively loaded, the port will be discharged. If the oil is returned to the port, it will be distributed in the middle of the complex. , The valve is placed in its way to restore the oil in the part of the road, the oil load is released and the C compound valve is asked. The locked pressure and anti-plaque oil can be forged, that is, the valve can be released. Variations, the negative effect of the load port is popular, and the return is higher than that of the rise. The pressure of the oil port valve will guide the flow to the chamber and the valve. The main oil of Tongyuan is connected to the valve road, and the valve in the part is reset and the valve is opened at the same time as the valve, and the direction is fixed and the lock is locked. The oil is warm, except for the valve The main solution is this, the valve can be returned immediately, the default stable port is a negative force, and the dynamic pulse of the pressure is connected to low-high, and the pressure is released and the pressure is released. Ready to release, release the pressure and release the pressure inside the air into a large piece release valve release pressure when the state of the IV is 0 mechanical. ^ 1 of the zero state of the machine, the zero of the want to change the J1 can be set up The machine can be stopped at the end of the coming year when it is nearly full, and the machine can be stopped at any time (please read the precautions on the back and then fill out this page) --- r ► Binding · Order Printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy- 25- This paper scale is applicable to the Chinese National Standard (CNS> A4 specification (210X297 mm). Printed and printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs Α7 Β7. V. Description of the invention (23) A brief description of the drawings. Figure 1 is the first invention. The cross-sectional view of the check valve when the embodiment is open; FIG. 2 is a cross-sectional view of the main part when the oil pressure is atmospheric pressure (o pressure) according to an embodiment of the invention; FIG. 3 is an embodiment of the invention The cross-sectional view of the main part when the preload pressure for opening the check valve is generated; the fourth circle is the cross-sectional view for the main part when the check valve is closed after generating the preload pressure; According to an embodiment of the invention, the check valve is slightly opened due to the release valve being slightly opened Figure 6 is a cross-sectional view of the main part of the check valve when the check valve is opened due to the full opening of the release valve according to an embodiment of the present invention; Figure 7 is a hydraulic circuit diagram of the overload safety device of the K punching machine; The figure is the cross-sectional view of the conventional device; the 9th circle is the main part cross-sectional ring when the oil pressure in the conventional device is atmospheric pressure (0 swell); The 10th figure is the main part cross-sectional view when the conventional device is under load; Figure 11 is a cross-sectional view of the main part of the conventional device when the release valve is slightly opened; Figure 12 is a cross-sectional view of the main part of the conventional device when the release valve is fully opened; Figure 13 is the elastic hairpin of the C-type punch Figure 14 is a front view of the elastic deformation of a linear side press; Figure 15 is a table showing the changes in hydraulic pressure / pressing load. -2 6-This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) I- n I 1 ΙΓ I l · · (Please read the precautions on the back before filling this page)