M378166 五、新型說明： 【新型所屬之技術領域】 本新型是有關於一種自行車前又避震器，特別是指— 種油氣分離式自行車前又避震器。 【先前技術】 如圖1所示’現有一油氣分離式自行車前又避震器丄 是包含一吸震缸筒11、一可動地設置在該吸震紅筒U中且 予以上下區隔出一油壓空間111與一氣壓空間丨丨2的自由活 塞12、一可上下滑移地插伸在該油壓空間U1中的活塞桿 13、一填充在該油壓空間iU中的液壓油體14,以及一充 灌在氣壓空間112中的高壓氣體15。該活塞桿13具有一將 該油壓空間111區隔成一上油腔丨13與一下油腔丨14的間塞 端部131 ’該閥塞端部131具有一連通該上、下油腔113、 114的油道132，該液壓油體14能穿流經該閥塞端部丨3丨之 油道132，以於該上、下油腔113、114間來回流動。 如圖2所示，當自行車（圖中未示）遭受到震動衝擊 ，而迫使該活塞桿13向下降移時，該下油腔114的壓力増 高，該液壓油體14會通過該閥塞端部131之油道132而向 上流至該上油腔113中，該液壓油體14通過該油道132時 所生流動阻力（即抑制壓縮之減衰力）會消耗掉所受震動 衝擊能量，藉以達到緩衝避震的阻尼效果；同時，由於該 上、下油腔Π3、m的體積變化，連帶造成該自由活塞^ 下移，該氣壓空間112之體積縮小，壓力相對增大，而透過 該自由活塞12施予該下油腔114—向上的抗壓。 3 M378166 而在震動衝擊消失後，該活塞桿13會向上升移，該上 油腔U3的壓力增大，該液堡油冑14會通過該閥塞端部 131之油道132而向下回流至該下油腔114中；另一方面， 因該上、下油腔113、114的體積變化，配合該氣壓空間 112所蓄積抗壓縮作用力的釋放，該自由活塞12會向上移 動，使得該氣壓空間112之體積增加，壓力相對減小。 由上述可知，該油氣分離式自行車前又避震器1主要 是利用該液壓油體14流通過該閥塞端部131之油道132時 所f生阻尼效果，搭配該氣壓空@ 112中高壓氣冑Μ所生 之氣體彈簧抗壓縮效應，以能達到緩衝避震功能。而對相 關製造業者來說’如何使充填在該氣壓空間112中之高壓氣 體15長期封存而柳属’以免因該氣壓空間μ的壓力損 失而影響I縮減震效果，是屬當前較為困難的技術課題。 【新型内容】M378166 V. New description: [New technical field] The new type is related to a bicycle front shock absorber, especially a kind of oil-gas separation type bicycle front shock absorber. [Prior Art] As shown in Fig. 1, the prior art oil and gas separation type bicycle front shock absorber 包含 includes a shock absorbing cylinder 11 and is movably disposed in the shock absorbing red cylinder U and is separated from the upper and lower areas by a hydraulic pressure. a free piston 12 of a space 111 and a pressure space 丨丨2, a piston rod 13 which is vertically slidably inserted in the hydraulic space U1, a hydraulic oil body 14 filled in the hydraulic space iU, and A high pressure gas 15 is filled in the air pressure space 112. The piston rod 13 has a port end portion 131 that partitions the oil pressure space 111 into an oil chamber 丨13 and a lower oil chamber '14. The valve plug end portion 131 has a communication between the upper and lower oil chambers 113. An oil passage 132 of 114, the hydraulic oil body 14 can pass through the oil passage 132 of the valve plug end portion 丨3丨 to flow back and forth between the upper and lower oil chambers 113 and 114. As shown in FIG. 2, when the bicycle (not shown) is subjected to a shock shock and the piston rod 13 is forced to move downward, the pressure of the lower oil chamber 114 is high, and the hydraulic oil body 14 passes through the valve plug. The oil passage 132 of the end portion 131 flows upward into the oiling chamber 113, and the flow resistance generated by the hydraulic oil body 14 passing through the oil passage 132 (ie, suppressing the compression reducing force) consumes the shock energy of the shock. Thereby, the damping effect of the buffer suspension is achieved; at the same time, due to the volume change of the upper and lower oil chambers 、3, m, the free piston is moved downward, the volume of the air pressure space 112 is reduced, and the pressure is relatively increased, and the pressure is relatively increased. The free piston 12 is applied to the lower oil chamber 114 - upward pressure resistance. 3 M378166, after the shock shock disappears, the piston rod 13 will move upward, the pressure of the oil chamber U3 increases, and the liquid oil reservoir 14 will flow back through the oil passage 132 of the valve plug end 131. Up to the lower oil chamber 114; on the other hand, due to the volume change of the upper and lower oil chambers 113, 114, in conjunction with the release of the anti-compression force accumulated in the air pressure space 112, the free piston 12 will move upward, so that the The volume of the air pressure space 112 increases and the pressure is relatively reduced. It can be seen from the above that the front and rear shock absorber 1 of the oil-gas separation type bicycle mainly utilizes the damping effect of the hydraulic oil body 14 flowing through the oil passage 132 of the valve plug end portion 131, and the high pressure is matched with the air pressure of the air pressure. The gas spring produced by the gas cockroach has anti-compression effect to achieve the buffer shock absorber function. For the relevant manufacturers, how to make the high-pressure gas 15 filled in the air pressure space 112 long-term storage and the genus will not affect the pressure reduction of the pressure space μ, which is a difficult technology. Question. [New content]
Ah 裡盹長期維捋穩 的緩衝避震效果’而相當耐用的自行車前又避震器。 於是，本新型之自行車避震器，包含一缸座單元， 及-壓縮單元。該缸座單元包括一單缸筒、一固定在該 缸筒中且上下區隔出一液壓空間與_氣壓空間的油氣分丨 塞、—填充在該液壓空間中的液壓流體，以及一充灌在^ 氣壓空間中的氣壓流體；該單缸筒具有_鄰接該液壓空i 的封閉端部’以及-相反於該封閉端部且鄰接該氣壓空丨 的充氣端部。該壓縮單it包括•貫穿該單紅筒之封閉端j 與該油氣分隔塞以能在該單虹筒中轴向滑移的活塞桿座 4 M378166 一設置在該活塞桿座上且能在該液壓空間中上下移動的液 壓閥塞，以及一設置在該活塞桿座上且能在該氣壓空間上 下移動的氣壓閥塞；該液壓閥塞將該液壓空間區隔成上油 腔與一下油腔，該液壓流體能穿流經該液壓閥塞以於該上 、下油腔間來回流動；該氣壓閥塞將該氣壓空間區隔成一 上氣腔與一下氣腔，該氣壓流體能穿流經該氣壓閥塞以在 該上、下氣腔流動。 本新型之功效在於，利用該活塞桿座帶動該氣壓閥塞 於該氣壓空間中上下移動，迫使該氣壓流體穿流經該氣壓 閥塞而在該上、下虱腔流動的設計，能使該氣壓空間長久 維持在初始壓力狀態，延緩洩氣狀況，讓整體能產生長久 、穩定的緩衝避震效果，而相當耐用。 【實施方式】 有關本新型之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 如圖3所不，本新型之自行車前又避震器的該較佳實 施例，該自行車前又避震器包含一缸座單元2，以及一壓縮 單元4。 該缸座單70 2包括一單缸筒21、一固定在該單缸筒21 中且予以上下區隔出一液壓空間211與一氣壓空間212的油 氣分隔塞22、一填充在該液壓空間211中的液壓流體23、 一充灌在該氣壓空間212中的氣壓流體24,以及一用以對 該氣壓空間212進行充氣的氣嘴閥25 ;本實施例中，該液 5 M378166 壓流體23為液壓油，該氣壓流體2 # ^ ® 24為鬲壓氮氣。該單缸 )同具有—鄰接該液壓空間211且能防止油漏的封閉端部 =，以及-相反於該封閉端部214且鄰接該氣壓空間212 並此防止氣洩的充氣端部215,該葡喈關 邊虱嘴閥25則是設置在該 充氣端部215中。 21之封閉端部214 中轴向往復滑移的 上且將該液壓空間 的倒Τ型液壓閥塞 該壓縮單元4包括一貫穿該單缸筒 與》亥/由氣分隔塞22以能在該單紅筒21 活塞桿座41、一設置在該活塞桿座41 211區隔成一上油腔216與下油腔217 、一設置在該活塞桿座41上且將該氣壓空間212區隔成 -上氣腔218與-下氣腔219的倒τ型氣壓閥塞“、一能 擴縮地環套在該氣壓閥塞43之鄰接該下氣腔219之一底部 處的閥環44,以及一套設在該液壓閥塞42上且其一頂、底 端分別連接該單缸筒21之封閉端部214與該液壓閥塞42 的支撲彈箦45。本實施例中，該支撐彈簧45是一鋼線拉伸 彈簧。 該液壓閥塞42能在該液壓空間211中上下移動，而使 該上、下油腔216 ' 217的體積與油壓產生消長變化，該液 壓閥塞42並具有一連通該下油腔217的軸流式底壁孔421 ’以及二連通該上油腔216與該底壁孔421的側流式側壁 孔422。該液壓流體23能穿流經該液壓閥塞42之底壁孔 421、側壁孔422 ’而得以在該上、下油腔216、217之間來 回流動。 該活塞桿座41具有一貫穿該單缸筒21之封閉端部214 6 M378166 且其一底端插固在該液壓閥塞42中的外活塞桿411、一貫 穿該油氣分隔塞且其一頂、底端分別固接該液壓閥塞42與 該氣壓閥塞43的内活塞桿412，以及一能軸向移動地螺設 在該外活塞桿411令的調整桿413。其中，該調整桿413具 有一螺組在該外活塞桿411中的螺頭414、一其一頂端連接 該螺頭414且轴穿在該外活塞桿411中的桿本體415，以及 一設置在該桿本體415之一底端且突出該外活塞桿411外並 受該液壓閥塞42包圍的節流閥體416。主要是，當旋動該 螺頭414，使該桿本體415帶動該節流閥體416下移，而阻 隔該底壁孔421與該二側壁孔422時，該液壓流體23便無 法流通過該液壓閥塞42 ’也就無法在該上、下油腔216、 217間來回流動；相反地，當旋動該螺頭414以使該桿本體 415帶動該節流閥體416上移，讓該底壁孔421與該二側壁 孔422相連通時，該液壓流體23便能流通過該液壓閥塞42 ，並在該上、下油腔216、217間來回流動，特別是，可再 進一步控制節流閥體416的高度位置，調整該底壁孔421 與該二側壁孔422之間的連通程度’用以改變該液壓流體 23於通過該液壓閥塞42時的流量、流速與所生流動阻力等 流動狀態》 另外’該氣壓閥塞43也會在該氣壓空間212中上下移 動’而使該上、下氣腔218、219的體積與氣壓產生消長變 化；該氣壓閥塞43具有一其一頂、底端分別連通該上、下 氣腔218、219的氣流道431 ’該閥環44便是封阻在該氣流 道431之底端與該下氣腔219之間。例如，在該氣壓閥塞 7 43下移後而上移復位時，會造成該上氣i 2i8的體積縮小 且氣壓增大，因而迫使位在該上氣腔218中的氣壓流體^ 流入該氣流道431中，並頂推該閥環44而使其向外擴擇開 ，進而從該氣流道431之底端出流以進入該下氣腔219中 〇 如圖4所示，是使該自行車前又避震器呈現出無緩衝 避震效果的狀態，由於是將該活塞桿座41的節流閥體々Μ 調降至完全阻斷該液壓閥塞42之底壁孔421與側壁孔422 ，故當該活塞桿座41受到震動衝擊而向下降移時，該液壓 閥塞42會向下移動，不但會迫使該支撐彈簧45向下拉伸 而施予該液壓閥塞42 —反向之抗拉伸作用力，同時會迫壓 該下油腔217之體積縮小、油壓增大，但此時該液壓流體 23無法通過該液壓閥塞42而上流至該上油腔216中即不 會產生緩衝避震效果，因而該下油腔217會施予該液壓閥 塞42 —抗壓縮作用力；同樣地，該氣壓閥塞43也會下移 而迫壓該下氣腔219之體積縮小、氣壓增大，位在該下氣 腔219中的氣壓流體24受該閥環44擋阻而無法通過該氣 流道431以上流至該上氣腔218中，因而該下氣腔219會 施予該氣壓閥塞43 —抗壓縮作用力。 如圖5所示’ 一旦衝擊震動力消失，該活塞桿座41會 向上升移，連帶使該液壓閥塞42、該氣壓閥塞43上移且 該支撐彈簧45回復形狀，而讓該上、下油腔216、217與 該上、下氣腔218、219的體積與壓力再生變化；而在該氣 壓閥塞43上移的過程中，相對造成該上氣腔218體積縮小 M378166 、壓力增大，因而讓位在該上氣腔218中的氣壓流體24下 流進入該氣流道431 ’同時迫推該閥環44向外擴撐以不再 遮擋住該氣流道431之底端，氣壓流體24便能穿流經該氣 流道431以下流至該下氣腔219中。 如圖6所示’該自行車前又避震器是呈現出較軟性的 長衝程緩衝避震效果，主要在於將該節流閥體416調升到 最高點，使該液壓閥塞42的側壁孔422與底壁孔421呈最 大連通程度。因此’當該活塞桿座41受到震動衝擊而向下 降移時’該液壓閥塞42會下移而迫壓該下油腔217之體積 縮小、油壓增大，使該液壓流體23依序流經該底壁孔421 、該二側壁孔422而上流至該上油腔216中，以產生較軟 性的長衝程緩衝避震效果；同時，該氣壓閥塞43也會下移 而迫壓該下氣腔219之體積縮小、氣壓增大，使得該下氣 腔219施予該氣壓閥塞43 —抗壓縮作用力。 而在衝擊震動消失後，該活塞桿座41會向上升移，該 上油腔216的壓力增大，該液壓流體23會依序流經該二側 壁孔422、該底壁孔421而向下回流至該下油腔217中；另 一方面，該氣壓活塞12也會向上移動，使得該下氣腔219 的體積增加，壓力相對減小，同時該氣壓流體24會穿流經 該氣流道431以流進入該下氣腔219中。 另外，若欲使該自行車前又避震器產生較硬的短衝程 緩衝避震效果，只要將該節流閥體416再稍微調降，縮小 側壁孔422與底壁孔421間的連通程度，以增大該液壓流 體23通過該液壓閥塞42時所生的流動阻力即可。簡言之 9 M378166 ’當側壁孔422與底壁孔421之間的連通/開放程度越大時 ，該液壓流體23流經時所生流動阻力較小，所產生的緩衝 避震效果越偏軟性’相反地，當侧壁孔422與底壁孔421 之間的連通/開放程度越小時，該液壓流體23流經時所生流 動阻力較大，所產生的緩衝避震效果則趨硬性。 因此，利用該液壓油體流通過該液壓閥塞42時所產生 的阻尼效果，搭配s玄氣壓流體24受該氣壓閥塞43壓縮所 生如氣體彈簧之抗壓縮效應，與該支撐彈簧45被該液壓閥 塞42拉伸所生之抗拉伸效應，使得該自行車前叉避震器能 夠提供極佳的緩衝避震效能，讓自行車騎乘過程中享有極 佳的穩定度與操控性；特別是，利用該活塞桿座4丨帶動該 氣壓閥塞43於該氣壓空間212中上下移動，迫使該氣壓流 體24穿流經該氣壓閥塞43而從該上氣腔218流入該下氣 腔219的設計，能使該下氣腔219長時間地維持在初始壓 力狀態，相對延緩洩氣狀況，讓整體於長期使用後仍能表 現穩定的緩衝避震效果，故而相當耐用。 歸納上述，本新型之自行車前又避震器，整體能長期 維持極佳的緩衝避震效果而相當耐用，故確實能夠達到本 新型之目的。 惟以上所述者，僅為本新型之較佳實施例而已，當不 能以此限定本新型實施之範圍，即大凡依本新型申請專利 範圍及新型說明内容所作之簡單的等效變化與修飾，皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 10 圖1是一剖視圖，說明現有一油氣分離式自行車々 避震器的結構態樣； 圖2是一剖視圖，說明該油氣分離式自行車前又避震 器受到震動衝擊時的結構態樣； 圖3是一剖視圖，說明本新型之自行車前又避震器之 —較佳實施例的結構； 圖4是一剖視圖’說明該較佳實施例呈現出無緩衝避 震效果的結構態樣； 圖5是一剖視圖，說明該較佳實施例於所受震動衝擊 肖失時，其一氣壓閥塞之一氣流道的一底端與一下氣腔相 連通；以及 圖6是—剖視圖，說明該較佳實施例呈現出較軟性之 長衝程緩衝避震效果的結構態樣。 M378166 【主要元件符號說明】 2 缸座單元 4 壓縮單元 21 單缸筒 41 活塞桿座 211 液壓空間 411 外活塞桿 212 氣壓空間 412 内活塞桿 214 封閉端部 413 調整桿 215 充氣端部 414 螺頭 216 上油腔 415 桿本體 217 下油腔 416 節流閥體 218 上氣腔 42 液壓閥塞 219 下氣腔 421 底壁子L 22 油氣分隔塞 422 側壁孔 23 液壓流體 43 氣壓閥塞 24 氣壓流體 431 氣流道 25 氣嘴閥 44 閥環 45 支撐彈簧 12Ah Lie has a long-term, stable cushioning effect, and a very durable bicycle front shock absorber. Thus, the bicycle shock absorber of the present invention comprises a cylinder block unit and a compression unit. The cylinder block unit comprises a single cylinder, an oil and gas plug which is fixed in the cylinder tube and has a hydraulic space and a pressure space in the upper and lower sections, a hydraulic fluid filled in the hydraulic space, and a filling ^ Pneumatic fluid in the air pressure space; the single cylinder has a closed end ' adjacent to the hydraulic air i' and an aerated end opposite the closed end and adjacent to the air pressure. The compression unit includes: a piston rod seat 4 M378166 penetrating through the closed end j of the single red cylinder and the oil and gas separation plug so as to be axially slidable in the single rainbow barrel, and the hydraulic rod can be disposed on the piston rod seat a hydraulic valve plug moving up and down in the space, and a pneumatic valve plug disposed on the piston rod seat and movable up and down in the air pressure space; the hydraulic valve plug partitioning the hydraulic space into an oiling chamber and a lower oil chamber, The hydraulic fluid can flow through the hydraulic valve plug to flow back and forth between the upper and lower oil chambers; the pneumatic valve plug divides the air pressure space into an upper air chamber and a lower air chamber, and the pneumatic fluid can flow through the The pneumatic valve plug flows in the upper and lower air chambers. The utility model has the advantages that the piston rod seat drives the air pressure valve plug to move up and down in the air pressure space, forcing the air pressure fluid to flow through the air pressure valve plug to flow in the upper and lower jaw chambers, so that the The air pressure space is maintained at the initial pressure state for a long time, delaying the deflation condition, so that the whole body can produce a long-term, stable buffer suspension effect, and is quite durable. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. As shown in Fig. 3, in the preferred embodiment of the bicycle front shock absorber of the present invention, the bicycle front shock absorber comprises a cylinder block unit 2 and a compression unit 4. The cylinder block 70 2 includes a single cylinder 21, an oil and gas separation plug 22 fixed in the single cylinder 21 and partitioning a hydraulic space 211 and a gas pressure space 212 from above and below, and filling in the hydraulic space 211. a hydraulic fluid 23, a pneumatic fluid 24 filled in the air pressure space 212, and a gas nozzle valve 25 for inflating the air pressure space 212; in this embodiment, the liquid 5 M378166 pressure fluid 23 is Hydraulic oil, the pressure fluid 2 # ^ ® 24 is a nitrogen gas. The single cylinder) has a closed end portion that abuts the hydraulic space 211 and prevents oil leakage, and - an inflatable end portion 215 that is opposite to the closed end portion 214 and abuts the air pressure space 212 and prevents air leakage. The Portuguese side flap valve 25 is disposed in the inflation end 215. The axially reciprocatingly sliding portion of the closed end portion 214 of the 21st and the inverted hydraulic valve plug of the hydraulic space includes a penetrating through the single cylinder and a gas separation plug 22 to enable The single red cylinder 21 is disposed on the piston rod seat 41 211 to form an oiling chamber 216 and a lower oil chamber 217, and is disposed on the piston rod seat 41 and partitions the air pressure space 212 into - An inverted air pressure valve plug of the upper air chamber 218 and the lower air chamber 219, a valve ring 44 that is expandably sleeved at a bottom of the air valve plug 43 adjacent to one of the lower air chambers 219, and a The top end and the bottom end of the hydraulic valve plug 42 are respectively connected to the closed end portion 214 of the single cylinder tube 21 and the baffle magazine 45 of the hydraulic valve plug 42. In this embodiment, the support spring 45 is disposed. Is a steel wire tension spring. The hydraulic valve plug 42 can move up and down in the hydraulic space 211, and the volume and the oil pressure of the upper and lower oil chambers 216 217 are changed, and the hydraulic valve plug 42 has An axial flow bottom wall hole 421 ' communicating with the lower oil chamber 217 and two side flow side wall holes 422 communicating with the oil receiving chamber 216 and the bottom wall hole 421. The hydraulic fluid 23 can flow through the bottom wall hole 421 and the side wall hole 422 ′ of the hydraulic valve plug 42 to flow back and forth between the upper and lower oil chambers 216 and 217. The piston rod seat 41 has a single cylinder penetrating therethrough. The closed end portion of the cylinder 21 is 214 6 M378166 and an outer piston rod 411 whose bottom end is inserted into the hydraulic valve plug 42 passes through the oil and gas separation plug and a top and bottom end thereof are respectively fixed to the hydraulic valve plug 42. An inner piston rod 412 of the pneumatic valve plug 43 and an adjusting rod 413 screwed to the outer piston rod 411 in an axially movable manner. The adjusting rod 413 has a screw group in the outer piston rod 411. a screw head 414, a rod end 415 connected to the screw head 414 and threaded in the outer piston rod 411, and a bottom end of the rod body 415 and protruding outside the outer rod rod 411 The throttle body 416 is surrounded by the hydraulic valve plug 42. Mainly, when the screw head 414 is rotated, the rod body 415 drives the throttle body 416 to move downward, and blocks the bottom wall hole 421 and the second When the side wall hole 422 is closed, the hydraulic fluid 23 cannot flow through the hydraulic valve plug 42', and the upper and lower oil chambers 216 cannot be in the upper and lower oil chambers 216. 217 flows back and forth; conversely, when the screw head 414 is rotated to cause the rod body 415 to move the throttle body 416 upward to allow the bottom wall hole 421 to communicate with the two side wall holes 422, the hydraulic pressure The fluid 23 can flow through the hydraulic valve plug 42 and flow back and forth between the upper and lower oil chambers 216, 217. In particular, the height position of the throttle body 416 can be further controlled, and the bottom wall hole 421 can be adjusted. The degree of communication between the two side wall holes 422 is used to change the flow state of the flow rate, the flow rate, and the flow resistance of the hydraulic fluid 23 when passing through the hydraulic valve plug 42. In addition, the pneumatic valve plug 43 is also in the flow state. The air pressure space 212 moves up and down 'to make the volume and the air pressure of the upper and lower air chambers 218, 219 change rapidly; the air pressure valve plug 43 has a top and a bottom end respectively communicating with the upper and lower air chambers 218, 219 The air passage 431 'the valve ring 44 is sealed between the bottom end of the air passage 431 and the lower air chamber 219. For example, when the pneumatic valve plug 7 43 is moved down and moved up and reset, the volume of the upper air i 2i8 is reduced and the air pressure is increased, thereby forcing the pneumatic fluid in the upper air chamber 218 to flow into the air flow. In the channel 431, the valve ring 44 is pushed up to expand outwardly, and then flows out from the bottom end of the air flow path 431 to enter the lower air chamber 219. As shown in FIG. 4, the bicycle is made. The front shock absorber exhibits a state of unbuffered suspension effect, since the throttle body of the piston rod seat 41 is lowered to the bottom wall hole 421 and the side wall hole 422 which completely blocks the hydraulic valve plug 42. Therefore, when the piston rod seat 41 is moved downward by the shock, the hydraulic valve plug 42 moves downward, which not only forces the support spring 45 to pull downward but also applies the hydraulic valve plug 42. The tensile force is forced to reduce the volume of the lower oil chamber 217 and the oil pressure is increased, but at this time, the hydraulic fluid 23 cannot flow through the hydraulic valve plug 42 to the oil chamber 216, that is, Producing a buffer suspension effect, so the lower oil chamber 217 will apply the hydraulic valve plug 42 - anti-compression force; The pneumatic valve plug 43 is also moved downward to pressurize the lower air chamber 219 to reduce the volume and increase the air pressure. The pneumatic fluid 24 located in the lower air chamber 219 is blocked by the valve ring 44 and cannot pass the valve. The air flow passage 431 flows into the upper air chamber 218, and thus the lower air chamber 219 applies the air pressure valve plug 43 to resist compression. As shown in FIG. 5, once the impact vibration force disappears, the piston rod seat 41 will move upward, and the hydraulic valve plug 42 and the air pressure valve plug 43 will move up and the support spring 45 will return to the shape, and let the upper, The volume and pressure of the lower oil chambers 216, 217 and the upper and lower air chambers 218, 219 are regenerated; and during the upward movement of the air valve plug 43, the upper air chamber 218 is relatively reduced in volume M378166, and the pressure is increased. Therefore, the pneumatic fluid 24 in the upper air chamber 218 flows down into the air passage 431' while pushing the valve ring 44 outwardly to no longer block the bottom end of the air passage 431, and the pneumatic fluid 24 The flowable through the air flow path 431 flows into the lower air chamber 219. As shown in FIG. 6 , the front shock absorber of the bicycle is a long-stroke buffer suspension effect exhibiting softness, mainly in that the throttle body 416 is raised to the highest point so that the side wall of the hydraulic valve plug 42 is bored. 422 is in maximum connectivity with the bottom wall aperture 421. Therefore, when the piston rod seat 41 is moved downward by the shock, the hydraulic valve plug 42 is moved downward to pressurize the lower oil chamber 217 to reduce the volume and increase the oil pressure, so that the hydraulic fluid 23 flows in sequence. The bottom wall hole 421 and the two side wall holes 422 are upflowed into the oiling chamber 216 to generate a soft long-stroke buffer suspension effect; meanwhile, the air valve plug 43 is also moved downward to urge the lower portion. The volume of the air chamber 219 is reduced and the air pressure is increased, so that the lower air chamber 219 is applied to the air pressure valve plug 43 to resist the compressive force. After the shock vibration disappears, the piston rod seat 41 will move upward, and the pressure of the oil chamber 216 increases, and the hydraulic fluid 23 flows through the two side wall holes 422 and the bottom wall hole 421 in sequence. Returning to the lower oil chamber 217; on the other hand, the pneumatic piston 12 is also moved upward, so that the volume of the lower air chamber 219 is increased, the pressure is relatively decreased, and the pneumatic fluid 24 flows through the air passage 431. The flow enters the lower air chamber 219. In addition, if the front shock absorber of the bicycle is to produce a hard short stroke buffer shock absorber effect, the throttle body 416 is slightly lowered again to reduce the degree of communication between the side wall hole 422 and the bottom wall hole 421. It is sufficient to increase the flow resistance generated when the hydraulic fluid 23 passes through the hydraulic valve plug 42. In short, 9 M378166 'When the degree of communication/openness between the side wall hole 422 and the bottom wall hole 421 is larger, the flow resistance generated when the hydraulic fluid 23 flows through is small, and the cushioning suspension effect is softer. On the contrary, when the degree of communication/openness between the side wall hole 422 and the bottom wall hole 421 is small, the flow resistance generated when the hydraulic fluid 23 flows is large, and the resulting shock absorbing effect is hard. Therefore, by utilizing the damping effect generated when the hydraulic oil body flows through the hydraulic valve plug 42, the singular pneumatic fluid 24 is compressed by the pneumatic valve plug 43 to generate a compression-resistant effect of the gas spring, and the support spring 45 is The anti-tension effect of the hydraulic valve plug 42 is stretched, so that the bicycle front fork shock absorber can provide excellent cushioning and shock absorbing performance, and the bicycle enjoys excellent stability and handling during riding; The piston rod block 4 is used to drive the pneumatic valve plug 43 to move up and down in the air pressure space 212, forcing the air pressure fluid 24 to flow through the air valve plug 43 and flow from the upper air chamber 218 into the lower air chamber 219. The design enables the lower air chamber 219 to maintain the initial pressure state for a long period of time, relatively delaying the deflation condition, so that the overall shock absorption effect can be exhibited after long-term use, and thus is quite durable. In summary, the bicycle front shock absorber of the present invention can maintain excellent cushioning and shock absorption effect for a long time and is quite durable, so it can achieve the purpose of the present invention. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, All remain within the scope of this new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a structural aspect of a conventional oil-gas separation type bicycle squatting shock absorber; FIG. 2 is a cross-sectional view showing the shock absorber of the oil-and-gas separation type bicycle in front of the shock absorber Figure 3 is a cross-sectional view showing the structure of the bicycle front shock absorber of the present invention - a preferred embodiment; Figure 4 is a cross-sectional view showing the preferred embodiment exhibiting an unbuffered suspension effect Figure 5 is a cross-sectional view showing the preferred embodiment of a preferred embodiment of a pneumatic valve plug having a bottom end of a gas flow passage connected to a lower air chamber; and Figure 6 is - The cross-sectional view illustrates the structural aspect of the preferred embodiment showing a relatively long-stroke buffer suspension effect. M378166 [Main component symbol description] 2 Cylinder block unit 4 Compression unit 21 Single cylinder tube 41 Piston rod seat 211 Hydraulic space 411 Outer piston rod 212 Air pressure space 412 Inner piston rod 214 Closed end 413 Adjusting rod 215 Inflating end 414 Screw head 216 Oiling chamber 415 Rod body 217 Lower oil chamber 416 Throttle valve body 218 Upper air chamber 42 Hydraulic valve plug 219 Lower air chamber 421 Bottom wall L 22 Oil and gas separation plug 422 Side wall hole 23 Hydraulic fluid 43 Pneumatic valve plug 24 Pneumatic fluid 431 air passage 25 valve valve 44 valve ring 45 support spring 12