201000741 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種關門器，特 滑動組及油路提高運轉順暢 ^彡、有關方、種利用 【先前技術】 …自動關門器。 關門器主要係用以對門板 關閉時具緩衝效果，且關門器使門板 ㈣:"儲存能量’以在外力從門板移；時能自 板回復關閉，如我國公告專利 ^ 來實現關門器之動作，惟，上述關門器之齒輪 與齒條在嚙合時會有齒隙存 玆告階绨+ 使用下會因磨損而導 、ω、： ’使侍齒輪與齒條之嚙合出現間歇性接觸，造 成關門器運轉不順暢。 ° 【發明内容】 ―本發明之主要目的係在於提供一種自動關門器，其係 包含一殼體'—滑動組、一傳動組、一筒狀活塞以及一第 一彈性件，該殼體係設有一前腔、一後腔及一連通該前腔 與該後腔之中間腔、一貫穿該中間腔之軸孔以及一第一油 路’該第一油路係具有一連通該前腔之進油口及—連通該 後腔之出油口，該滑動組係設置於該殼體之該中間腔，該 滑動組係包含有一設置於該進油口與該出油口之間的滑 座以及分別設置於該滑座内之一第一滾輪及一第二滾 輪’該傳動組係包含有一傳動軸及一結合於該傳動轴之偏 心凸輪’該傳動轴係樞設於該殼體之該軸孔，而該偏心凸 7 .201000741 輪係位於該滑座内，B, ' /、μ /月動、‘且之該第一滚輪及該第二 滾輪相抵接’該筒狀 壬食後要+入* 门狀活塞係§又置於該殼體之該後腔，且 筒狀活塞係具有—m _山 〇Λ _ 卜 弟鈿邰及—相對於該第一端部之第 “ *卩人赛端部係連接該第—滾輪，該第一彈性件係 設置於該殼體之該前胖 ’、 刖肢，用以推動該滑動組之該滑座， 發明係藉由該滑座盥兮钤灿、.冬皆 月座η δ玄清狀活塞之往復運動及該第—油 路之作用而可提高自動關門器之運轉順暢性。 1 【實施方式】 請參閱第1、2及3圖，其係本發明之其中一較佳實 :例，-種自動關門器係包含有—殼體i。、一滑動組2:、 傳動，.且3 0活塞組4 〇、一彈性組件5 〇以及一對封蓋 6〇，該殼體1〇係定義有一長軸方向1〇&及一短軸方向 1〇b’且沿著該長軸方向l〇a係設有一前腔U1、一後腔113 及一連通該前腔111及該後腔113之中間腔112，而沿著 °亥紐轴方向1 〇b係設有一軸孔1 2，該軸孔1 2係開設於該 殼體1〇且貫穿該中間腔112，請參閱第1及6A圖，在本 A施例中，s玄前腔111、該中間腔11 2與該後腔11 3内係 填充有液壓油’且該殼體1〇内係設有一·連通該前腔ill 與該後腔1 1 3之第一油路丨3、一位於該第一油路丨3内之 第一單向閥1 4、一連通該後腔丨丨3之第二油路1 5以及一 位於該第二油路1 5内之第二單向閥1 6，其中該第一油路 13係具有一連通該前腔Π1之進油口 13a及一連通該後腔 113之出油口 13b，該第一單向閥I*係鄰設於該第一油路 1 3之该出油口丨3 b，而該第二油路1 $係分別具有連通該 201000741 後腔113之一進口 i5a、一第一出口 15b及一第二出口 1 5 c，該苐二單向閥1 6係鄰設於該第二油路1 5之該進口 1 5 a，又，在本貫施例中，該殼體1 〇另具有一設置於該第 二油路15之該第一出口 15b之第一調整閥17及一設置於 读第二油路15之該第二出口 15c之第二調整閥a，該第 一調整閥1 7及該第二調整閥1 8係分別用以調整該第一出 口 15b及a玄第一出口 15c之出油量’請再參閱第1、2及3 圖’該滑動組20係設置於該殼體1〇之該中間腔丨12，且 該滑動組20係可於該中間腔112中移動，該滑動組2〇係 包含有一滑座21、一第一滾輪22及一第二滾輪23，該滑 座2 1係具有一上板2 11、一相對於該上板2 11之下板2 1 2、 一連接該上板2 11與該下板212之側板2 1 3及一形成於該 上板2 11與该下板2 1 2之間的夾槽2 1 4，在本實施例中， 该側板2 1 3係具有一回油孔2 1 3 a ’該第一滾輪2 2係設置 於該夾槽2 14，且該第一滾輪2 2係可於該失槽2 1 4中移 動，邊上板2 11及該下板2 12係分別形成有一相互對應之 開孔2 11 a、2 1 2 a ’各該開孔2 11 a、2 1 2 a.係對應該殼體1 〇 之遠軸孔12，且該第一滾輪2 2係對應各該開孔2 11 a、 212a’而該第二滾輪23係固設於該夹槽214中並鄰近該 滑座21之該側板213，在本實施例中，該滑座21另形成 有一貫穿該上板211及該下板212之貫穿孔215,該第二 滾輪23係對應該貫穿孔21 5，又’該滑動組2〇另包含有 一第二固定件25及一 E型扣環26’該第二固定件25係穿 設於該滑座2 1之該貫穿孔21 5 ’且該第二固定件25係貫 9 201000741 第滾輪23 ’以將該第二滾輪23固設於該滑座2 1之 該爽槽2 1 4 tb 平’又’該E型扣環26係扣接於該第二固定 件25之一独 ^ ’以防止該第二固定件25鬆脫。 °月再參閱第i及3圖，該傳動組3 〇係包含有一傳動 車由 3 1 „„么士 —-合於該傳動軸3 1之偏心凸輪32及一軸蓋33， 忒傳動軸3 1係樞設於該殼體1〇之該軸孔12，且該傳動軸 η係穿設於該上板211及該下板212之各該開孔2ua、 2 1 2a ’較佳地，該傳動軸3丨係一體形成該偏心凸輪w， 以增加該傳動轴31之結構強度，該偏心凸輪32係位於該 滑座21之該夾槽214巾，且與該滑動組20之該第一滾輪 22及該第二滾輪23相抵接，該軸蓋μ係套設於該傳動軸 31並蓋合於該殼體10之該軸孔12,在本實施例中，該傳 動軸31係藉由該軸蓋33結合於該殼體之該軸孔12, 且該傳動軸3卜端係凸出於該轴蓋33，以便與—固設於 ^反或門框之連桿組（圖未繪出）連接，當門板開啟或關閉 日寸’遠連桿組係會帶動該傳動之該傳動軸Μ轉動， 而該偏心凸輪32係會隨著該傳動軸31轉動而旋轉，該偏 心凸輪32在旋轉過程中係會頂推與其相抵接之該第一滾 輪U及該第二滾輪23,當該偏心凸輪32頂推該第二滾輪 23時，係會帶動該滑座21從該中間腔m往該前腔m 移動。 請再參閱第1及3圖，該法耷〜Λ @活塞組40係設置於該殼體 1 0之该後腔113，且該活塞奴4 〇孫_ρ 係可於該後腔11 3中移 動，该活塞組40係包含有一筒肤、$金j 同狀，舌塞41及一設置於該筒 10 201000741 狀活塞41内之安全閥組件42,該筒狀活塞41係具有一外 :壁4U、-第-端部411、—相對於該第—端部川之 第一端# 412、-連通該第—端冑411與該第二端部 之軸向油道4 1 3及-連通該外側壁4 } &與該軸向油道4 3 之側向油It 414,該第—端部411係連接於該第一滾輪 22’在本實施例中，該第—端部4ιι係具有—上凸板4na、 一相對於該上凸板411a之下凸板4m及—貫穿該上凸板 4 11 a及及下凸板4 11 b之樞接孔4〖丨c，該第一滾輪22係位 於該上凸板41U與該下凸板4m之間，且該第一滾輪22 係對應該樞接孔411C，又，在本實施例中，該上凸板4Ua 係嵌設於該上板2U之該開孔2Ua，而該下&板4nb係 瓜《χ於忒下板2 1 2之該開孔2 1 2 a，且該上凸板411 a及該 下凸板4 1 1 b係可分別於該開孔2丨丨a及該開孔2丨2a中軸向 移動’而為了將該筒狀活塞41之該第—端部41丨連接於 s玄第一滾輪22，在本實施例中，該滑動組2〇可另包含有 —第一固定件24，該第一固定件24係穿設於該第一端部 4 11之該樞接孔4 1 1 C，且該第一固定件24係貫穿該第一 滾輪22，藉由該第一固定件24係可將該筒狀活塞4丨之該 第一端部4 11連接於該第一滚輪2 2，且當該偏心凸輪3 2 頂推該第一滾輪22時，係會帶動該筒狀活塞41於該後腔 113中移動’另外，在本實施例中’該側向油道414係可 移動地對應該第二油路1 5之該第一出口 1 5b或該第二出 口 1 5c。請再參閱第1及3圖’該安全閥組件42係設置於 該筒狀活塞41之該軸向油道413内’且該安全閥組件42 201000741 係包含有一閥座421、一穿設於該閥座421内之套管422 以及一設置於該套管422内之安全閥423，在本實施例中， 該套管422係具有一洩油孔道422a，該安全閥423係設置 於該洩油孔道422a内，且在正常操作狀態下，該安全閥 423係會關閉㈣油孔道422a，此外’為防止該$油孔道 422a被液壓油中之雜質阻塞而無法作用，在本實施例中， 可另包含設置一濾網43於該閥座421之一端，用以過濾 液壓油中之雜質及防止雜質進入該洩油孔道42h。 請再參閱第1及3圖，該彈性組件5〇係組設於該殼 體1 0之該前腔1 n，且抵接於該滑動组2〇之該滑座2 ^， 在本實施例中，該彈性組件5〇係可調節該自動關門器之 開關力，且該彈性組件5〇係包含有一位於該滑座21之一 侧之第-彈性件51、—穿設於該第—彈性件Μ内之第二 彈f生件52 ' -調整元件53、—設置於該第二彈性件w 一 端之彈簧端蓋54、—抵接於該滑座21之該側板213之頂 抵件5 5 —设置於該頂抵件5 5内之第三單向閥5 6、一可 位為第—單向閥56之限位件57以及—套設於該頂抵件 5\之油封環58,該第一彈性件51係具有一第一端51&及 :第二端5lb’該第—彈性件51之該第二端训係抵接於 忒頂抵件55 ’在本實施例中，該頂抵件55係設置於該滑 :21與該第-彈性件51之間，且該頂抵件55係可於： 則肽U 1中移動，該頂抵件55係具有一表面55a、~形成 於該表面55a之凸柱55b、—外周壁55〇及一對應該回油 孔213a之回油通道55d，或者，在另一實施例中，該頂抵 12 201000741 件5共该滑座21之該側板2 13係可一體成划 η 1 Μ 2 h再參閱 弟 及3圖，在本實施例中，該第二彈性件52 —山 設於該頂抵件55之該凸柱55b且抵接於該頂抵件^係套 表面55a ’該調整元件53係設置於該前腔 之°玄 愈該第一ί留ω_丄 —端，並 ”：第坪性件幻之該第-端5U連接，而該 # 54係设置於該調整元件53與該第二彈性件52 、盍 實施例中’該調整元件53係包含有一調整螺絲二1在本 結合於該調整螺絲531之調整螺帽532,該彈簧 及— 设置於該調整元件53之該調整螺帽Μ 皇54係 52 ^ M R β弟二彈性徠 之間，且該調整螺帽532係抵接該彈簧端 件 實施例中，令楚 ω社 ’在本 忒苐一弹性件51及該第二彈性件 該頂抵件55旆知厭士 2係用以對 靶加壓力，而該調整螺絲53〗 調整螺帽5 3 2 、可調整該 ^對该第一彈性件51之壓縮量 頂推該彈筈踹甚 > 亦可藉由 、盍54以调整該彈簧端蓋54對該篦 52之壓縮量，谁而π.* , 對。亥弟二彈性件 可達到微調該自動關門器 效。此外，太督价/，丄 4兑間關力之功 、本實施例中，當該滑座21往該前 時，該滑座21儀可茲^ ^ 1移動 ，、错由頂推該頂抵件55以 件5 1及該第-碟, τ兩第一彈性 第—彈性件52進行壓縮；反之 5 1及該第二彈性半 弟—彈性件 . ^ 牛2亦可藉由頂推該頂抵件55 座21復位。又， 5以使戎滑 玲再參閱第1及3圖，該第二πο 係設置於該頂抵件 弟—早向閱56 " 之该回油通道5 5 d内，哕ΒΡ μ , 係貫穿該頂抵件55 忒限位件S7 $笛一 ασ 〜凸柱55b及該回油通道55d，u Μ:早向間56限位於該回油通道55d中，：/將 則套設㈣料件55之料 環 衣’田対％ 5 8係 13 201000741 可防止液壓油從該頂抵件55 之—前腔壁111 a之pn_a 周壁5 5 c與該前腔1 11 〜叫b’L過，此外 封該殼體10兩端，以防止液_=該封蓋60係分別密 關於該自動關門器之作動馬 6A及㈣，首先，請參閱第4A/參閱第4A、4B、5、 啟門板時，該偏心凸輪32係會轉:二，當以外力開 及帶動兮、晋庙，1 / 而項推该第二滾輪2 3 及π動“座2丨往該前腔⑴移 會推動該頂抽杜ς < —夺，該滑座2 1係 r推㈣頂抵件55以壓縮該第 件52，此外，該了頁抵件心 # 14件51及該第二彈性 之液壓油流入該第-油路13之哕進、：’"别腔111内 n ^ ^ 疋忒進油口 13a，進入該第一 油路13之液壓油壓力係 荖，、、存厭、“ a 于°亥第-单向閥14 P省啟，接 者液壓油係會從該第一油路13 饴脉1 η #认 之5亥出油口 13b流入該 紅⑴並推動該筒狀活塞41往該中間腔ιΐ2方向移動； 反之，凊參閱第4B及6B圖，當外力經 ^ 件51及該第二彈性件 、8’ 4第一彈性 21 係會頂推該頂抵件55及該滑座 y线偏心凸輪32使之旋轉，該偏心凸輪Μ轉動 日、’係會頂推該第一滾輪22及帶動該筒狀活塞“々主哼封 蓋6^方向移動’此時，位於該後腔113之液壓油係^受 到該筒狀活塞41之推壓而流入該第二油@ Η之該進口 15a’進入該第二油路15之液壓油壓力係會使得該第二單 向閥16 %啟’接著，液壓油得、會從該第二油路is之該第 —出口 15b及該第二出口 15c流入該筒狀活塞*丨之該側 向油道414及該軸向油道413，並依序流入該中間腔ιΐ2、 該滑座21之該側板213之該回油孔2Ua及該頂抵件55 14 201000741 之該回油通道55d ’最後回流至該前腔Ui，以使門板關 閉’在本實施例中’液壓油係會先從該第二油路丨5之該 第一出口 15b流入該筒狀活塞41之該側向油道414及該 軸向油道413，而隨著該筒狀活塞41逐漸往該封蓋6〇方 向移動，該$二油路15之該第—ώ σ 15M系會關閉，此 時，液壓油則改從該第二油路1 5之該第二出口 1 5c流入 該筒狀活塞41之該側向油道414及該軸向油道‘η，此 外，在本實施例中，當液壓油流人該頂抵彳^之該回油 通道55d時，該第三單向閥 利回流至該前腔111。 5 6係會開啟，以使液壓油順 另外，因門板在關閉過裎中其液壓油是慢慢回流至該 前腔111 ’倘若門板在關閉過程中突然遭受一外力作用（如 端門），關門器可能因液壓油回流不及而損壞，因此，請再 ^第，在本實施例中，#門板在關閉過程中 =然遭受-外力作用時’該安全閥組件42之該安全閥423 係=快速開啟，以使位於該後腔113之液壓油直接流入該 套S 422之該洩油孔道422a，並依序流經該中間腔m、 名滑座21之該側213之該回油孔2ΐ3&及該頂抵件η 之該回油通道55d，最後快速回流至該前⑮ιη，由於液 壓油可快速回流，因此，可防止關門器損壞，本發明係藉 :该滑座21與該筒狀活s 41之往復運動及該第一油路^ 與該第二油路15 <作用而可提高自動關門器之運轉順暢 性。 本發明之保護範圍當視後附之申請專利範圍所界定 15 ,201000741 者為準 ，任何熟知此項技藝者’在不脫離本發明之精神和 範圍内 所作之任何變化與修改’均屬於本發明之保護〜 圍。 【圖式簡單說明】 第 1 圖：依據本發明之一較佳實施例 ，一種自動 關 門器之 立體分解圖。 第 2 圖：該 自動關 門器之立體組合圖 0 第 3 圖··該 自動關 門器之縱剖視圖。 第4A 至4B圖：該 自動關 門器之動作橫剖視圖。 第 5 圖：該 自動關 門器之側视圖 〇 第6A 至6B圖：沿 第5圖 A-A線，該自動關 門器之動作 示 意圖。 【主要元件符號說明】 10 殼體 10a 長軸方向 10b 短轴方向 111 前腔 112 中間腔 113 後腔 12 軸孔 13 第一油路 13a 進油口 13b 出油口 14 第一早向閥 15 第二油路 15a 進口 15b 第一出D 15c 第二出口 16 第二單向閥 17 第一調整閥 18 第二調整閥 20 滑動組 21 滑座 211 上板 211a 開孔 212 下板 212a 開孔 213 側板 213a 回油孔 214 夾槽 215 貫穿孔 22 第一滚輪 23 第二滾輪 24 第一固定件 25 第二固定件 26 E型扣環 16 201000741 30 傳動組 3 1 傳動軸 32 偏心凸輪 33 軸蓋 40 活塞組 41 筒狀活塞 41a 外側壁 4 11 第一端部 411a 上凸板 411b 下凸板 411c 樞接孔 412 第二端部 413 軸向油道 414 侧向油道 42 安全閥組件 421 閥座 422 套管 422a 茂油孔道 423 安全閥 43 ί慮網 50 彈性組件 5 1 第一彈性件 5 1a 第一端 5 1b 第二端 52 第二彈性件 53 調整元件 5 3 1 調整螺絲 532 調整螺帽 54 彈簧端蓋 55 頂抵件 55a 表面 55b 凸柱 5 5c 外周壁 55d 回油通道 56 第三單向閥 57 限位件 58 油封環 60 封蓋 17201000741 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a door closer, a special sliding group and an oil passage for improving smooth operation, and related parties and species utilization [Prior Art] ... automatic door closer. The door closer is mainly used to buffer the door panel when it is closed, and the door closer makes the door panel (4): "storage energy' to move from the door panel when the external force is moved; when it can be closed from the board, such as the patent of China announced to realize the door closer Action, except that the gears and racks of the above-mentioned door closers will have a backlash when they are engaged. 使用 + will be guided by wear under the use of ω, : 'The intermittent contact between the gear and the rack will occur. The door closer is not working smoothly. [Invention] The main object of the present invention is to provide an automatic door closer, which comprises a casing'-sliding group, a transmission group, a cylindrical piston and a first elastic member, the casing is provided with a a front cavity, a rear cavity and an intermediate cavity connecting the front cavity and the rear cavity, a shaft hole penetrating the intermediate cavity, and a first oil circuit. The first oil circuit system has an oil inlet connected to the front cavity a port and a port for connecting the rear cavity, the sliding group is disposed in the intermediate cavity of the casing, the sliding group includes a sliding seat disposed between the oil inlet and the oil outlet, and respectively a first roller and a second roller disposed in the sliding seat. The transmission group includes a transmission shaft and an eccentric cam coupled to the transmission shaft. The transmission shaft is pivotally disposed on the shaft hole of the housing. And the eccentric convex 7.201000741 wheel train is located in the sliding seat, B, ' /, μ / month moving, 'and the first roller and the second roller abutting each other' The door piston system is placed in the rear cavity of the casing, and the cylindrical piston system has -m _ mountain _ _ 卜 钿邰 钿邰 — — 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对 相对In order to promote the sliding seat of the sliding group, the invention can improve the automatic movement by the reciprocating motion of the sliding seat, the winter moon and the η δ Xuanqing piston and the function of the first oil passage The operation of the door closer is smooth. 1 [Embodiment] Please refer to Figures 1, 2 and 3, which are one of the preferred embodiments of the present invention. The automatic door closer includes a housing i. Sliding group 2:, transmission, and 30 piston group 4 〇, an elastic assembly 5 〇 and a pair of cover 6 〇, the housing 1 defines a long axis direction 1 〇 & and a short axis direction 1 〇b' and along the long axis direction l〇a are provided with a front cavity U1, a rear cavity 113 and an intermediate cavity 112 connecting the front cavity 111 and the rear cavity 113, and along the axis of the axis The 〇b is provided with a shaft hole 12, and the shaft hole 12 is opened in the casing 1 and penetrates the intermediate cavity 112. Please refer to FIGS. 1 and 6A. In the embodiment A, the s-temporal cavity 111 The middle The chamber 11 2 and the rear chamber 11 3 are filled with hydraulic oil 'and the housing 1 is internally provided with a first oil passage 3 connected to the front chamber ill and the rear chamber 1 1 3 a first check valve 14 in the first oil passage 3, a second oil passage 15 connected to the rear chamber 3, and a second check valve 16 in the second oil passage 15 The first oil passage 13 has an oil inlet 13a communicating with the front chamber 1 and an oil outlet 13b communicating with the rear chamber 113. The first check valve I* is adjacent to the first oil. The oil outlet 丨3 b of the road 13 3, and the second oil passage 1 $ has an inlet i5a, a first outlet 15b and a second outlet 15 5 respectively connected to the rear chamber 113 of the 201000741, respectively. The two-way valve 16 is adjacent to the inlet 15 a of the second oil passage 15 . Further, in the present embodiment, the housing 1 further has a second oil passage 15 disposed thereon. a first adjustment valve 17 of the first outlet 15b and a second adjustment valve a disposed at the second outlet 15c of the second oil passage 15, the first adjustment valve 17 and the second adjustment valve 18 Used to adjust the first outlet 15b and the first outlet The oil output of 15c 'please refer to the first, second and third figures'. The sliding group 20 is disposed in the intermediate chamber 12 of the casing 1 , and the sliding group 20 is movable in the intermediate chamber 112 . The sliding group 2 includes a sliding seat 21, a first roller 22 and a second roller 23. The sliding base 2 1 has an upper plate 2 11 and a lower plate 2 opposite to the upper plate 2 11 . 1 2, a side plate 2 1 3 connecting the upper plate 2 11 and the lower plate 212 and a clamping groove 2 1 4 formed between the upper plate 2 11 and the lower plate 2 1 2, in this embodiment The side plate 2 1 3 has an oil return hole 2 1 3 a 'the first roller 2 2 is disposed in the clamping groove 2 14 , and the first roller 2 2 is movable in the lost groove 2 1 4 The side plate 2 11 and the lower plate 2 12 are respectively formed with mutually corresponding openings 2 11 a, 2 1 2 a 'each of the openings 2 11 a, 2 1 2 a. corresponding to the casing 1 〇 The second roller 23 is fixed to the slot 214 and adjacent to the side plate 213 of the slider 21 In this embodiment, the sliding seat 21 is further formed with a through plate 211 and The through hole 215 of the lower plate 212, the second roller 23 is corresponding to the through hole 21 5, and the sliding group 2 includes a second fixing member 25 and an E-shaped buckle 26'. The second fixing member 25 The through hole 21 5 ′ is disposed in the sliding seat 2 1 and the second fixing member 25 is connected to the 9 201000741 first roller 23 ′ to fix the second roller 23 to the refreshing groove of the sliding seat 2 1 . 2 1 4 tb flat 'again' the E-shaped buckle 26 is fastened to one of the second fixing members 25 to prevent the second fixing member 25 from coming loose. Referring to Figures i and 3 again, the transmission set 3 includes a transmission vehicle consisting of 3 1 „„士士—the eccentric cam 32 and a shaft cover 33 of the transmission shaft 31, and the transmission shaft 3 1 The shaft hole 12 is pivotally disposed in the housing 1 , and the transmission shaft η is disposed through the openings 2ua, 2 1 2a of the upper plate 211 and the lower plate 212. Preferably, the transmission The eccentric cam w integrally forms the eccentric cam w to increase the structural strength of the transmission shaft 31. The eccentric cam 32 is located in the clamping groove 214 of the sliding seat 21, and the first roller 22 of the sliding group 20 And the second roller 23 abuts, the shaft cover μ is sleeved on the transmission shaft 31 and covers the shaft hole 12 of the housing 10. In the embodiment, the transmission shaft 31 is driven by the shaft The cover 33 is coupled to the shaft hole 12 of the housing, and the drive shaft 3 protrudes from the shaft cover 33 so as to be connected with the link set (not shown) fixed to the door frame or the door frame When the door panel is opened or closed, the remote link group will drive the transmission shaft of the transmission to rotate, and the eccentric cam 32 will rotate as the transmission shaft 31 rotates, and the eccentric cam 32 is During the rotation, the first roller U and the second roller 23 are pushed against each other. When the eccentric cam 32 pushes the second roller 23, the slider 21 is driven from the intermediate cavity m. The front cavity m moves. Please refer to FIGS. 1 and 3 again. The method 耷 Λ @ piston group 40 is disposed in the rear cavity 113 of the housing 10, and the piston slave 4 〇 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Moving, the piston set 40 comprises a cylindrical body, a gold-like shape, a tongue plug 41 and a safety valve assembly 42 disposed in the cylinder 10 of the 201000741 piston. The cylindrical piston 41 has an outer wall: 4U, the first end portion 411, the first end end 412 of the first end portion, the first end end 411, and the axial oil passage 4 1 3 and the second end portion The outer side wall 4 } & and the lateral oil passage 4 3 of the lateral oil It 414 , the first end portion 411 is connected to the first roller 22 ′ in the embodiment, the first end portion 4 ι The first convex plate 4na, a convex plate 4m opposite to the upper convex plate 411a, and a pivot hole 4 through which the upper convex plate 4 11 a and the lower convex plate 4 11 b are inserted, the first The roller 22 is located between the upper convex plate 41U and the lower convex plate 4m, and the first roller 22 is corresponding to the pivot hole 411C. In this embodiment, the upper convex plate 4Ua is embedded in the roller plate 411C. The opening 2Ua of the upper plate 2U, and the lower & plate 4nb The opening of the lower plate 2 1 2 is 2 1 2 a, and the upper convex plate 411 a and the lower convex plate 4 1 1 b are respectively respectively located in the opening 2丨丨a and the opening 2 In order to connect the first end portion 41 of the cylindrical piston 41 to the s-shaped first roller 22, in this embodiment, the sliding group 2 can additionally include - first a fixing member 24 , the first fixing member 24 is disposed through the pivot hole 4 1 1 C of the first end portion 4 11 , and the first fixing member 24 extends through the first roller 22 a fixing member 24 is configured to connect the first end portion 4 11 of the cylindrical piston 4 to the first roller 2 2, and when the eccentric cam 3 2 pushes the first roller 22, the system drives the The cylindrical piston 41 moves in the rear chamber 113. In addition, in the present embodiment, the lateral oil passage 414 movably corresponds to the first outlet 15b or the second outlet of the second oil passage 15. 1 5c. Please refer to FIGS. 1 and 3 respectively. The safety valve assembly 42 is disposed in the axial oil passage 413 of the cylindrical piston 41. The safety valve assembly 42 201000741 includes a valve seat 421 and is disposed therein. The sleeve 422 in the valve seat 421 and a safety valve 423 disposed in the sleeve 422. In the embodiment, the sleeve 422 has an oil drain hole 422a, and the safety valve 423 is disposed on the drain. In the tunnel 422a, and under normal operating conditions, the safety valve 423 closes the (4) oil passage 422a, and in addition, 'to prevent the $ oil passage 422a from being blocked by impurities in the hydraulic oil, in this embodiment, Further, a filter 43 is disposed at one end of the valve seat 421 for filtering impurities in the hydraulic oil and preventing impurities from entering the oil drain hole 42h. Referring to FIGS. 1 and 3, the elastic component 5 is disposed in the front cavity 1 n of the housing 10 and abuts the slider 2 ^ of the sliding group 2, in this embodiment. The elastic component 5 can adjust the switching force of the automatic door closer, and the elastic component 5 includes a first elastic member 51 located on one side of the sliding seat 21, and is disposed at the first elastic a second spring member 52' of the member, a spring end cover 54 disposed at one end of the second elastic member w, and a top end member 5 abutting the side plate 213 of the slider 21 5 — a third one-way valve 56 disposed in the abutting member 5 5 , a limiting member 57 that can be positioned as the first one-way valve 56 , and an oil sealing ring 58 that is sleeved on the abutting member 5 . The first elastic member 51 has a first end 51& and a second end 51b'. The second end of the first elastic member 51 abuts against the dome abutment 55'. In this embodiment, The abutting member 55 is disposed between the sliding portion 21 and the first elastic member 51, and the abutting member 55 is movable in the peptide U1, the top abutting member 55 has a surface 55a, ~ a stud 55b formed on the surface 55a, - The peripheral wall 55〇 and a pair of oil return passages 55d which should be returned to the oil hole 213a, or, in another embodiment, the top abutment 12 201000741 member 5 of the slide plate 21 of the side plate 2 13 can be integrated into the η 1 In the present embodiment, the second elastic member 52 is disposed on the protruding post 55b of the abutting member 55 and abuts against the top bearing member sleeve surface 55a'. The adjusting component 53 is disposed at the front end of the front cavity, and the first end of the fifth end is connected to the first end 5U, and the #54 is set in the adjustment In the embodiment, the adjusting member 53 includes an adjusting screw 532 coupled to the adjusting screw 531, and the spring and the adjusting member 53 are disposed on the adjusting member 53. The adjusting nut Μ 54 54 54 52 ^ MR β 二 徕 徕 , , , , , , , , , , , , 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 532 And the second elastic member, the abutting member 55 is used to apply pressure to the target, and the adjusting screw 53 adjusts the nut 5 3 2 and is adjustable ^ The amount of compression of the first elastic member 51 is pushed up. The 盍 54 can also be used to adjust the amount of compression of the spring end cover 54 to the cymbal 52, which is π.*, right. Haidi two elastic parts can achieve the fine-tuning of the automatic door closing effect. In addition, the price of the super-supervisor/, 丄4 is the key to the work, in this embodiment, when the slide 21 is forward, the slide 21 ^^1moving, wrongly pushing the top abutting member 55 to compress the member 5 1 and the first disc, the first elastic first elastic member 52; and vice versa 5 1 and the second elastic half brother - Elastic member. ^ The cow 2 can also be reset by pushing the top abutment 55 seat 21. In addition, 5, in order to make the 戎 玲 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再 再Throughout the abutting member 55 忒 the limiting member S7 $ flute α α σ ~ the convex column 55 b and the oil return passage 55 d, u Μ: the early interval 56 is limited to the oil return passage 55d, : / will be set (four) material The material of the material 55 of the 55 is 対 対% 5 8 series 13 201000741 The hydraulic oil can be prevented from the ap_a peripheral wall 5 5 c of the front cavity wall 111 a and the front cavity 1 11 ~ b'L In addition, the two ends of the casing 10 are sealed to prevent the liquid_=the cover 60 from being respectively related to the automatic closing device 6A and (4). First, please refer to the 4A/refer to 4A, 4B, 5, and When the door panel is used, the eccentric cam 32 will rotate: Second, when the external force is opened and the 兮, Jin Temple is moved, 1 / and the second roller 2 3 and the π motion "seat 2 丨 move to the front cavity (1) will push The top pumping rhododendron, the slider 2 1 is r pushing (four) the abutting member 55 to compress the first member 52, and further, the sheet resisting member #14 member 51 and the second elastic hydraulic oil Inflow into the first-oil circuit 13,: '&q Uot; in the cavity 111, n ^ ^ breaks into the oil port 13a, and the hydraulic oil pressure system that enters the first oil path 13 is 荖, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The hydraulic oil system of the receiver flows from the first oil passage 13 to the red outlet port 13b into the red (1) and pushes the cylindrical piston 41 to move toward the intermediate chamber ι 2; 4B and 6B, when the external force member 51 and the second elastic member, the 8' 4 first elastic 21 system pushes the abutting member 55 and the sliding seat y-line eccentric cam 32 to rotate, the eccentric cam The rotation of the day, the system pushes the first roller 22 and drives the cylindrical piston to move in the direction of the main cover. At this time, the hydraulic oil system located in the rear cavity 113 receives the cylindrical piston 41. The pressure of the hydraulic oil that flows into the second oil@Η's inlet 15a' into the second oil passage 15 causes the second one-way valve to open 16%, and then the hydraulic oil is obtained from the first The first outlet 15b and the second outlet 15c of the second oil passage is flowed into the lateral oil passage 414 and the axial oil passage 413 of the cylindrical piston *, and sequentially flow into the intermediate chamber ι 2. The oil return hole 2Ua of the side plate 213 of the sliding seat 21 and the oil return passage 55d' of the top abutting member 55 14 201000741 are finally returned to the front cavity Ui to close the door panel 'in this embodiment' The hydraulic oil system first flows from the first outlet 15b of the second oil passage 5 into the lateral oil passage 414 of the cylindrical piston 41 and the axial oil passage 413, and the cylindrical piston 41 gradually moves toward the side. The cover 6 moves in the direction of the cover, and the first ώ σ 15M of the $2 oil passage 15 is closed. At this time, the hydraulic oil flows from the second outlet 15c of the second oil passage 15 into the cylinder. The lateral oil passage 414 of the piston 41 and the axial oil passage 'n. Further, in the embodiment, when the hydraulic oil flows to the oil return passage 55d of the top, the third one-way The valve is returned to the front chamber 111. 5 6 series will be opened to make the hydraulic oil smooth, because the hydraulic oil of the door panel is slowly returned to the front chamber 111 when the door is closed. If the door panel suddenly receives an external force (such as the end door) during the closing process, The door closer may be damaged due to the backflow of the hydraulic oil. Therefore, in the present embodiment, when the #门板 is subjected to the external force during the closing process, the safety valve 423 of the safety valve assembly 42 is Quickly opening, so that the hydraulic oil located in the rear chamber 113 directly flows into the oil drain hole 422a of the sleeve S 422, and sequentially flows through the intermediate chamber m, the oil return hole 2ΐ3& of the side 213 of the name slide 21 And the oil return passage 55d of the abutting member η, and finally quickly returning to the front 15 ιη, since the hydraulic oil can be quickly recirculated, thereby preventing the door closer from being damaged, the present invention is: the slide 21 and the tubular The reciprocating motion of the live s 41 and the action of the first oil passage ^ and the second oil passage 15 can improve the smoothness of the operation of the automatic door closer. The scope of the present invention is defined by the scope of the appended claims, the disclosure of which is incorporated herein by reference. Protection ~ Wai. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view of an automatic door closer according to a preferred embodiment of the present invention. Figure 2: Stereoscopic view of the automatic door closer 0 Fig. 3 · Longitudinal section view of the automatic door closer. Figures 4A to 4B: A cross-sectional view of the action of the automatic door closer. Figure 5: Side view of the automatic door closer 〇 Figures 6A to 6B: The action of the automatic door closer is shown along line A-A of Figure 5. [Main component symbol description] 10 Housing 10a Long axis direction 10b Short axis direction 111 Front cavity 112 Intermediate cavity 113 Rear cavity 12 Axle hole 13 First oil path 13a Oil inlet 13b Oil outlet 14 First early valve 15 Two oil passage 15a inlet 15b first outlet D 15c second outlet 16 second check valve 17 first adjustment valve 18 second adjustment valve 20 sliding group 21 slide 211 upper plate 211a opening 212 lower plate 212a opening 213 side plate 213a Oil return hole 214 Clamping groove 215 Through hole 22 First roller 23 Second roller 24 First fixing member 25 Second fixing member 26 E-type buckle 16 201000741 30 Transmission group 3 1 Transmission shaft 32 Eccentric cam 33 Shaft cover 40 Piston Group 41 cylindrical piston 41a outer side wall 4 11 first end portion 411a upper convex plate 411b lower convex plate 411c pivot hole 412 second end portion 413 axial oil passage 414 lateral oil passage 42 safety valve assembly 421 valve seat 422 sleeve Tube 422a Oil hole 423 Safety valve 43 网 mesh 50 Elastic assembly 5 1 First elastic member 5 1a First end 5 1b Second end 52 Second elastic member 53 Adjustment member 5 3 1 Adjustment screw 532 Adjustment nut 54 Spring End cap 55 abutting piece 55a surface 55b stud 5 5c outer peripheral wall 55d oil return passage 56 third check valve 57 limiter 58 oil seal ring 60 cover 17