201104073 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種車輛用引擎之水泵轉軸支撐構 造’特别是關於一種可提高組裝可靠度及組裝便利性之 車輛用弓丨擎之水泵轉轴支撐構造。 【先前技術】 現今，一般速克達型機車之内燃機(engine)在燃燒汽 油產生動力期間皆不可避免的會提高内燃機的工作溫 度’若工作溫度過高，將導致構件體積膨脹變大、構件 之間的間隙變小及機油黏性降低，因而造成構件之間的 摩擦及損耗增加，並因摩擦而連帶產生更高的溫度，最 後使得内燃機因過熱而損壞。因此，在内燃機運轉期 間’必需持續驅散其產生之熱能，以確保能正常運作。 目前’習知的内燃機之冷卻降溫構造可概分為水冷式、 氣冷式及油冷式等’其大多是附加在内燃機之外殼上， 並通過相關管道對内燃機進行散熱，藉此達到冷卻降溫 之目的。就水冷式的冷卻降溫構造而言，其通常具有一 水泵模組附加在内燃機之外殼上，以驅動水液循環流動 來進行熱交換。 舉例來說，請參照第1圖所示，中國公告第2727408 遽實用新型專利揭系一種摩托車發動機水泵，其包含系 體101、具進水通道102之泵蓋1〇3、骨架油封1〇4、 一軸承105及106、出水通道1〇7、位於泵腔1〇8内與 201104073201104073 VI. Description of the Invention: [Technical Field] The present invention relates to a water pump shaft support structure for a vehicle engine, particularly relates to a water pump shaft for a vehicle for improving assembly reliability and assembly convenience Support structure. [Prior Art] Nowadays, the internal combustion engine of the general-speed locomotive locomotive will inevitably increase the operating temperature of the internal combustion engine during the combustion of gasoline. If the operating temperature is too high, the volume expansion of the component will be increased. The gap between the two becomes smaller and the viscosity of the oil is lowered, thereby causing an increase in friction and loss between the members, and a higher temperature is caused by the friction, and finally the internal combustion engine is damaged by overheating. Therefore, it is necessary to continuously dissipate the heat generated during the operation of the internal combustion engine to ensure proper operation. At present, the conventional cooling and cooling structure of an internal combustion engine can be broadly classified into water-cooled, air-cooled, oil-cooled, etc., which are mostly attached to the outer casing of the internal combustion engine, and heat the internal combustion engine through relevant pipes to achieve cooling and cooling. The purpose. In the case of a water-cooled cooling and cooling structure, it usually has a water pump module attached to the outer casing of the internal combustion engine to drive the water-liquid circulation flow for heat exchange. For example, please refer to FIG. 1 , the Chinese Patent No. 2727408 遽 utility model patent discloses a motorcycle engine water pump, which comprises a system 101, a pump cover 1〇3 with a water inlet passage 102, and a skeleton oil seal 1〇 4, a bearing 105 and 106, the water outlet channel 1〇7, located in the pump cavity 1〇8 and 201104073
尺泵軸109頂端連接的葉輪11()、通過軸用擋圈ηι連 接在水泵軸109上的齒輪112，其中泵體1〇1密封裝配 於曲轴箱蓋113内，系蓋1〇3密封裂配於曲軸箱蓋113 上泵腔108是由泵蓋1〇3、泵體1〇1、曲軸箱蓋113 ”同圍繞而成’與泵腔1〇8相連通的出水通道1〇7則設 置於曲軸箱蓋113上，水泵軸109通過二轴承105及 06與果體101連接。果蓋1〇3、栗體1〇1及曲抽箱蓋 =3之間利用數個密封圈出彼此密封。再者，一機械 封機構114疋由套設於水栗軸1()9上的彈性密封膠套 辦姓彈脊m、石墨後118、陶究環119及密封圈120 成其中彈簀117二端抵在彈性密封膠套之 、下端緣内侧，彈性密封膠套116之下 ίΓΓ: Til?上’及上端緣外側抵在石墨環118上， κ 8可軸向移動的抵在陶竞環ΐΐ9上 9藉由密封ϋ 120結合在葉輪m的，並: 輪同步轉動。因此，可確保葉 並可與葉 笨鉍丨t 作保莱輪110在轉動時，佳 葉輪⑽側的水液不會經㈣隙滲漏到發動機内部。 =上赫㈣模組化設計而使組裝 利，但水泵在實際估用μ加目士 1 m為便 有下述問題:由於水栗轴 /的一軸承1〇5及1〇6皆設於齒輪ι 釉 我果體ιοί支撐，因此僅能提供單 紙且皆 齒輪112與發動機曲鈿夕牙放果。然而， 力難以藉由單側主Mi 未緣不)連動所產生的施 藉由早側支撐來平衡，因此容易 的失衡偏擺，造成齒輪⑴的轉_，《H9 201104073 處發生磨損而漏水β 實用t專：照第2圓所示，+國公告第27〇9658號 ==:一種摩托車水泵，其包含之構件大致 但其差異特徵在於水果轴ί09之相似圖號， 體101連接，而水泵軸 ^轴承105與泵 與曲軸箱本體二=之内:則藉由另-轴承⑽ 新型專利的二轴承：及：::齒第號實用 使平衡，泵在實際 106固定於曲軸箱本體12 d將軸承 軸承106僅处-·甘从 鬥然而，在組裝期間， 内，因此二…:配嵌設於曲輛箱本體121之孔 不便由=孔外’造成組敦或維修拆卸時的 二I 栗本身的零件之間以及水議 差，當組裝公差過大時，將導致水累積組裝公 Λη 1 -> λ -b 1〇9内端之p皆狀 W 22表面與軸承106的内圈表面之 而無法相互抵接。結果，可能無法穩=過大間隙’ 並造成正常運轉下因姉承106 承1〇6’ 或者、右組裝公差過小時’將适使水泵轴⑽之 而承的内圈’造成軸承⑽卡死 曲輪=1使水系模組整體無法緊密的⑽在 201104073 故’有必要提供一種車輛用引擎之水泵轉軸支撐構 造’以解決習知技術所存在的問題。 【發明内容】 本發明之主要目的在於提供一種車輛用引擎之水泵 轉軸支撐構造，其係以曲轴箱本體之軸承座内的軸承來 做為第一支撐部支撐水泵轉軸之内端，及以水泵本體之 軸孔來做為第二支撐部支撐水泵轉軸之中段，其中軸承 座設有定位元件可供定位軸承，同時軸孔則直接利用曲 轴箱本體内之機油來提供潤滑效果，因此能簡化水泵構 造'提高組裝便利用及組裝可靠度、增加轉動穩定性、 減少轉動異音，並延長使用壽命。 為達上述之目的，本發明提供一種車輛用引擎之水 泵轉軸支撐構造，其用以支撐一水泵模組之一水泵轉 軸，其中該水录模組另包含一水系本體、一水系蓋體、 一葉輪及一齒輪，該水泵本體裝設於一曲軸箱本體上， 該水泵蓋體蓋設於該水泵本體外，該葉輪結合於該水泵 轉軸之一第一端上並位於該水泵蓋體内，及該齒輪結合 於該水泵轉軸之一第二端的鄰近區段上，其特徵在於σ. 該支稽構造包含-[支卿及-第二切部，其中該 第支撐部係為該曲軸箱本體之一轴承座内的一軸 承’該第二支撲部為該水果本體之-軸孔，藉由該輛承 座及軸孔支撐該水泵轉軸，且該曲軸箱本體之軸承座另 設有一定位元件’用以穩固定位該軸承。 201104073 在本發明之一實施例中，該水泵轉軸之第二端形成 有一小徑部及一階狀部，該小徑部插設於該軸承内，及 該階狀部與該定位元件之間具有一間距。 在本發明之一實施例中，該定位元件係一卡簧，及 該軸承座之内壁設有一環狀凹槽，以固定該卡#。 在本發明之一實施例中，該定位元件係一固定片， 及該軸承座之内壁設有一固定槽，以插設固定該固定 在本發明之一實施例中，該曲軸箱本體在該固定槽 之内壁設有一螺孔，該螺孔螺設有一螺絲，以固定該固 定槽内之固定片。 在本發明之一實施例中，該定位元件係一螺帽，其 具有外螺紋，及該軸承座之内壁設有内螺紋，以螺設結 合該螺帽。 在本發明之一實施例中，該水泵本體之軸孔的内壁 形成有至少一入油缺口，以導引潤滑油流入該軸孔内。 在本發明之一實施例中，該水泵本體之軸孔的内壁 另形成有至少一出油缺口，以導引潤滑油流出該軸孔。 在本發明之一實施例中，該入油缺口及出油缺口位 於該軸孔之相對侧。 在本發明之一實施例中，該入油缺口之面積大於該 出油缺口之面積。 在本發明之一實施例中，另包含一彈性密封機構， 其安裝於該水泵本體之一組裝孔内，且該彈性密封機構 201104073The impeller 11 () connected to the top end of the shaft pump shaft 109 is connected to the gear 112 on the water pump shaft 109 through the shaft retaining ring ηι, wherein the pump body 1〇1 is sealingly fitted in the crankcase cover 113, and the cover 1〇3 is sealed. The pumping chamber 108 disposed on the crankcase cover 113 is provided by the pump cover 1〇3, the pump body 1〇1, the crankcase cover 113 ”, and the water outlet passage 1〇7 which communicates with the pump chamber 1〇8. On the crankcase cover 113, the water pump shaft 109 is connected to the fruit body 101 through the two bearings 105 and 06. The fruit cover 1〇3, the chestnut body 1〇1 and the curved pumping box cover=3 are sealed with each other by a plurality of sealing rings. Furthermore, a mechanical sealing mechanism 114 is made up of an elastic sealing rubber sleeve set on the water chestnut shaft 1 () 9 to perform the ridge ridge m, the graphite back 118, the ceramic ring 119 and the sealing ring 120 into the magazine 117. The two ends are located on the inner side of the lower end edge of the elastic sealing rubber sleeve, under the elastic sealing rubber sleeve 116. T: Til? and the outer edge of the upper end edge abut on the graphite ring 118, and the κ 8 can be axially moved against the Tao Jinghuan 9 9 is coupled to the impeller m by means of a sealing cymbal 120, and: the wheel rotates synchronously. Therefore, it is ensured that the leaf can be used with the leaf awkward t. The water on the side of the wheel (10) will not leak into the engine through the (four) gap. = The upper (4) modular design makes the assembly profitable, but the pump actually estimates the μ plus 1 m for the following problems: One of the bearings 1〇5 and 1〇6 of the water chestnut shaft is set on the gear y glaze. I can only provide a single sheet of paper and both the gear 112 and the engine 放 钿 放 。. The action generated by the one-sided main Mi is not balanced by the early side support, so the easy imbalance yaw causes the gear (1) to turn _, "H9 201104073 wears and leaks β practical t: As shown in the second circle, +National Notice No. 27〇9658 ==: A motorcycle water pump, which contains the components roughly but the difference is characterized by the similar figure of the fruit shaft ί09, the body 101 is connected, and the water pump shaft bearing 105 With the pump and the crankcase body two = within: the other bearing by the other bearing (10): and::: tooth No. practical balance, the pump is fixed in the actual case 106 to the crankcase body 12 d bearing bearing 106 Only - Gan is from the bucket, however, during assembly, inside, therefore two...: fitted in the song The hole in the box body 121 is inconvenient from the outside of the hole, causing the difference between the parts of the two I chests and the water when repairing and disassembling, and when the assembly tolerance is too large, the water accumulation assembly Λ 1 -> -b 1〇9 The inner end of the p-shaped W 22 surface and the inner ring surface of the bearing 106 cannot abut each other. As a result, it may not be stable = excessive clearance 'and cause normal operation due to bearing 106 bearing 1 〇 6 'Or, the right assembly tolerance is too small' will make the inner ring of the pump shaft (10) to cause the bearing (10) to jam the crank wheel = 1 so that the water system module can not be tight overall (10) in 201104073, so it is necessary to provide a vehicle engine The water pump shaft support structure 'to solve the problems of the prior art. SUMMARY OF THE INVENTION The main object of the present invention is to provide a water pump shaft support structure for a vehicle engine, which uses a bearing in a bearing housing of a crankcase body as a first support portion to support an inner end of a water pump shaft, and a water pump The shaft hole of the body serves as a second support portion to support the middle portion of the water pump shaft, wherein the bearing seat is provided with a positioning component for positioning the bearing, and the shaft hole directly utilizes the oil in the crankcase body to provide lubrication effect, thereby simplifying the water pump The structure 'improves assembly convenience and assembly reliability, increases rotational stability, reduces rotational noise, and extends service life. In order to achieve the above object, the present invention provides a water pump shaft support structure for a vehicle engine for supporting a water pump shaft of a water pump module, wherein the water recording module further comprises a water system body, a water system cover body, and a water system cover body. An impeller and a gear, the water pump body is mounted on a crankcase body, the water pump cover body is disposed outside the water pump body, and the impeller is coupled to the first end of the water pump shaft and located in the water pump cover body. And the gear is coupled to an adjacent section of the second end of the water pump shaft, characterized by σ. The structure comprises - [branch and - second cut, wherein the first support is the crankcase body a bearing in the bearing housing is a shaft hole of the fruit body, and the water pump shaft is supported by the bearing seat and the shaft hole, and the bearing seat of the crankcase body is further provided with a positioning The component 'is used to stabilize the bearing. In an embodiment of the present invention, the second end of the water pump shaft is formed with a small diameter portion and a stepped portion, the small diameter portion is inserted into the bearing, and between the step portion and the positioning component Has a spacing. In an embodiment of the invention, the positioning member is a circlip and the inner wall of the bearing housing is provided with an annular groove for fixing the card #. In an embodiment of the invention, the positioning component is a fixing piece, and an inner wall of the bearing seat is provided with a fixing groove for inserting and fixing the fixing. In an embodiment of the invention, the crankcase body is fixed at the fixing The inner wall of the groove is provided with a screw hole, and the screw hole is provided with a screw to fix the fixing piece in the fixing groove. In an embodiment of the invention, the positioning member is a nut having an external thread, and the inner wall of the bearing housing is internally threaded to be screwed to the nut. In an embodiment of the invention, the inner wall of the shaft hole of the water pump body is formed with at least one oil inlet notch to guide the lubricating oil to flow into the shaft hole. In an embodiment of the invention, the inner wall of the shaft hole of the water pump body is further formed with at least one oil outlet to guide the lubricating oil out of the shaft hole. In an embodiment of the invention, the oil inlet gap and the oil outlet gap are located on opposite sides of the shaft hole. In an embodiment of the invention, the area of the oil inlet gap is larger than the area of the oil discharge gap. In an embodiment of the invention, an elastic sealing mechanism is further disposed in one of the assembly holes of the water pump body, and the elastic sealing mechanism is 201104073
及*油㈣具有-油封環槽連通於該入油缺D 針軸承或含油軸承實施例中’該軸承選自滾珠軸承、滾 再者，本發明提供另一種 撐構造’其用以切-峨組之一支 2模組另包含—水系本體、-水泵蓋雜、-葉輪2 蓋二本體裝設於-曲軸箱本趙上，該水果蓋趙 一〜〜7栗本體外’該葉輪結合於該水轉轴之一第 :端上並位於該杨蓋體内，及難輪結合於該水 的鄰—段上，其特徵在於：該支撐構造 ^ 一第-支樓部及-第二切部，其中該第—支樓部 ，為該曲㈣本體之—軸承座内的—軸承，該第二支撑 I5為該水|本體之—轴孔，藉由該軸承座及軸孔支撲該 水系轉軸，且該水泵本體之轴孔的内㈣成有至少一入 油缺口及至少一出油缺口，該入油缺口導引潤滑油流入 該軸孔内’及該出油缺口導引潤滑油&出該軸孔。 【實施方式】 為了讓本發明之上述及其他目的、特徵、優點能更 明顯易懂，下文將特舉本發明較佳實施例，並配合所附 圖式，作詳細說明如下。 請參照第3圖所示，本發明之車輛用引擎之水泵轉 軸支撐構造主要係應用在具有引擎及水泵之中小型車 201104073 輛上，例如各種機車或沙灘車等，其中本 泵模組2G組裝於—引擎之-曲軸箱本體30上，、=由 本發明提狀續構料確絲錢之一2 轉轴21敝裝可#度、㈣便利性及轉動穩定性。1 發明於下文提及之上、下、左、右、内、料方位用扭 係以圖面中-般正常使用狀態下機車之方向為= 準，上述方位用語其僅是用來輔助說明相_u 關係，並非用來限制本發明，於此合先敘明。爻、、且裝 請參照第3及3A圖所示，本發 泵模組20主要包含該水泵轉軸21、一 2例之水 不果本體29、— 水泵蓋體23、一葉輪24、一齒輪25及—六 26 ;同時’該曲軸箱本體30主要句人 欲封機構 軸承座3】、一 軸承32、-環狀凹槽33及-定位元件％。 : 撐構造則包含一第一支撐部A及—赏_ 士 β 支 該第一支撐部Α係為該曲軸箱本 ^撐部B，其中 内的轴承32;以及，該第二切之—轴承座Μ 之一軸孔221。 切“為該水栗本體22 請再參照第3及3Α圖所示，本發明第 水泵轉軸21較佳係一金屬軸椁，其具有一第一端=' 端)、-第二端212(外端)及〜中間區段：33=^ 一端211用以結合該葉輪24 ;該第二端m用^轉 動的插設在該第-支撐部人4承32内；及該中間區 段213穿設通過該水栗本體22之轴孔221(即該第二支 樓部B)。如第3A圖所示’在本發明之第一支撐部A處， 201104073 該曲轴箱本體3G之轴承座31另設有該定位元件34， 用乂穩1§定位該轴承32 ^該軸承&則可選自滾珠轴 承滾針軸承、含油軸承或其他型式之軸承。在本實施 例中，該定位元件34係一卡簧，例如c型扣環或E型 才衣，同時，該軸承座31之内壁設有一環狀凹槽33， 以固定該卡簧。藉此，在組裝該水泵模組2〇期間，該. 軸承32可預先利用該定位元件34穩固定位於該軸承座 31内，以避免該軸承32意外脫離該軸承座31，進而提 商組装便利用，並可在該水泵轉軸21轉動時，增加其 轉動穩定性以及減少轉動異音。另外，該水泵轉軸21 之第一端212較佳進一步加工形成有一小徑部212a及 一階狀部212b，該小徑部2i2a可供插設於該軸承32 内，及該階狀部212b與該定位元件34之間係保持一預 定間距’該間距必需控制為大於該水泵模組可能存 在的累積組裝公差，以避免因累積組裝公差而影響該水 系轉軸21之組裝良率或轉動穩定性的潛在問題。 請復參照第3、3A及3B圖所示，本發明第一實施 例之水栗本體22較佳係由金屬製成，該水泵本體22相 似於習用之曲軸箱蓋，該水泵本體22可裝設於該曲轴 箱本體30上’且該水泵本體22開設有相互連通之該組 裝孔220及軸孔22卜其中該轴孔221之孔徑小於該組 裝孔220，且該軸孔221用以做為該第二支撐部b。該 軸孔221可供該水泵轉轴21之中間區段213直接穿設 通過’以便支撐該水泵轉軸21，並使該水泵轉軸21能And the oil (4) has an oil seal ring groove communicating with the oil inlet D needle bearing or the oil bearing. In the embodiment, the bearing is selected from the group consisting of a ball bearing and a roller, and the present invention provides another support structure for cutting-cutting One of the 2 sets of modules is further included - the water system body, the water pump cover, the - impeller 2 cover two bodies are mounted on the crankcase Ben Zhao, the fruit cover Zhao Yi ~ ~ 7 Liben in vitro 'the impeller is combined with the One of the water rotating shafts is at the end and located in the poplar cover body, and the hard wheel is coupled to the adjacent section of the water, and is characterized in that: the supporting structure is a first branch portion and a second cut portion Wherein the first branch portion is a bearing in the bearing body of the curved body (four), and the second support I5 is a shaft hole of the water body; the shaft is supported by the bearing seat and the shaft hole a rotating shaft, and the inner (4) of the shaft hole of the water pump body has at least one oil inlet notch and at least one oil notch, the oil inlet notch guides the lubricating oil flowing into the shaft hole' and the oil outlet guiding lubricating oil & Out of the shaft hole. The above and other objects, features and advantages of the present invention will become more <RTIgt; Referring to FIG. 3, the water pump shaft support structure of the vehicle engine of the present invention is mainly applied to a small and medium-sized vehicle 201104073 with an engine and a water pump, such as various locomotives or ATVs, wherein the pump module 2G is assembled. - On the crankcase body 30 of the engine, = one of the wire splicing materials of the present invention is 2, the shaft 21 can be loaded with #度, (4) convenience and rotational stability. 1 The invention refers to the above, the lower, the left, the right, the inner and the material orientation, and the direction of the locomotive is normal in the normal use state. The above orientation language is only used to help explain the phase. The _u relationship is not intended to limit the invention, and is hereby incorporated by reference.爻, , and, please refer to Figures 3 and 3A, the pump module 20 mainly includes the water pump shaft 21, a waterless body 29 of a case, a water pump cover 23, an impeller 24, a gear 25 and - 6 26; at the same time 'the crankcase body 30 is mainly intended to seal the mechanism bearing seat 3], a bearing 32, an annular groove 33 and a positioning element %. The support structure includes a first support portion A and a tour guide β. The first support portion is the crankcase portion B, wherein the inner bearing 32; and the second cut bearing One of the shaft holes 221. Cut "for the water chest body 22, please refer to Figures 3 and 3 again. The first water pump shaft 21 of the present invention is preferably a metal shaft 椁 having a first end = 'end) and a second end 212 ( The outer end) and the middle section: 33=^ one end 211 is used to join the impeller 24; the second end m is inserted into the first support portion 4 in the first support portion; and the intermediate portion 213 Passing through the shaft hole 221 of the water chestnut body 22 (ie, the second branch portion B). As shown in FIG. 3A, at the first support portion A of the present invention, 201104073, the bearing housing of the crankcase body 3G 31 is further provided with the positioning element 34 for positioning the bearing 32. The bearing & can be selected from a ball bearing needle bearing, an oil bearing or other type of bearing. In this embodiment, the positioning element The 34 is a circlip, such as a c-shaped buckle or an E-type garment, and the inner wall of the bearing housing 31 is provided with an annular groove 33 for fixing the circlip. Thereby, the water pump module 2 is assembled. During this period, the bearing 32 can be fixedly positioned in the bearing housing 31 by using the positioning component 34 in advance to prevent the bearing 32 from accidentally disengaging from the bearing housing 31, thereby facilitating the merchant group. The utility model is convenient for loading, and can increase the rotation stability and reduce the rotating abnormal sound when the water pump shaft 21 rotates. In addition, the first end 212 of the water pump shaft 21 is further processed to form a small diameter portion 212a and a step shape. The portion 212b, the small diameter portion 2i2a can be inserted into the bearing 32, and the step portion 212b and the positioning member 34 are maintained at a predetermined interval. The spacing must be controlled to be greater than the possible existence of the water pump module. The assembly tolerances are accumulated to avoid potential problems affecting the assembly yield or rotational stability of the water system shaft 21 due to cumulative assembly tolerances. Please refer to Figures 3, 3A and 3B for the first embodiment of the present invention. The body 22 is preferably made of metal. The water pump body 22 is similar to the conventional crankcase cover. The water pump body 22 can be mounted on the crankcase body 30 and the water pump body 22 is provided with the assembly hole communicating with each other. 220 and the shaft hole 22, wherein the hole of the shaft hole 221 is smaller than the assembly hole 220, and the shaft hole 221 is used as the second support portion b. The shaft hole 221 is available for the middle portion of the water pump shaft 21 213 directly through the 'through Supporting the water pump shaft 21 and enabling the water pump shaft 21 to
11 201104073 相對該水泵本體22轉動。在引擎運轉期間，該曲軸箱 本體30内之潤滑油（即機油）會滲入該水泵本體22之軸 孔221内，以潤滑其内壁，進而減少該水泵轉軸21與 軸孔221之間的摩擦力。在本發明中，由於該第二支楗 部B直接利用該軸孔221支撐該水泵轉軸21 ’因此可 以省略設置轴承，而能相對簡化該第二支撐部B的構 造。再者，該軸孔221的内壁較佳形成有至少一入油缺 口 222 ’該入油缺口 222用以進一步增加導引潤滑油流 入該軸孔221之效率。該水泵本體22之軸孔221的内 壁較佳另對應形成有至少一出油缺口 223，以導引潤滑 油流出該軸孔221。該入油缺口 222及出油缺口 223較 佳位於該軸孔221之相對侧，且該入油缺口 222之面積 較佳大於該出油缺口 223之面積。 請再參照第3圖所示，本發明第一實施例之水泵蓋 體23係由金屬製成之蓋體，其可组裝結合於該水杲本 體22或直接與該水泵本體22 —體成型。該水泵蓋體 23蓋設於該水泵本體22外，且該水泵蓋體23之内部 形成一腔室230連通於該水泵本體22之一組裝孔220。 該水泵蓋體23同時設有一入水通道231及一出水通道 (未繪示），以分別將水液導入該腔室230内及導出該腔 室230。再者，該葉輪24係結合於該水泵轉轴21之第 一端211上，並位於該水泵蓋體23之腔室230内。該 葉輪24具有數個葉片（未標示），其用以驅動水液的循 環流動。另外，該齒輪25係結合於該水泵轉軸21之第 12 201104073 二端212的鄰近區段上，其中該曲軸箱本體30内之曲 軸（未繪示）可經由至少一連動齒輪（未繪示）來帶動該齒 輪25及水泵轉軸21轉動。值得注意的是，在本發明中， 該第一支撐部A及第二支撐部B分別位於該齒輪25之 二側，因此能提供雙侧支撐效果，可有效改善因該齒輪 25轉動而產生的轉動平衡問題，以增加轉動穩定性及 減少運轉異音。 請參照第3、3A及3B圖所示，本發明第一實施例 之彈性密封機構26安裝於該水泵本體22之組裝孔220 内，並介於該葉輪24及該軸孔221之間，用以確保該 葉輪24在轉動時，使該葉輪24側的水液不會經由縫隙 滲漏到該曲軸箱本體30内部。在本發明中，該彈性密 封機構26係屬於一般水泵既有構造，因此對其細部構 造不再另予詳細描述。然而，在本實施例中，該彈性密 封機構26包含一油封261，該油封261具有一油封環 槽260，該油封環槽260連通於該入油缺口 222及出油 缺口 223。在該水泵本體22之入油缺口 222將潤滑油 導入該軸孔221後，潤滑油將順勢流入該油封環槽 260，接著再經由該出油缺口 223回流至該曲軸箱本體 30内。 請參照第4A圖所示，本發明第二實施例之車輛用 引擎之水泵轉轴支撐構造係相似於本發明第一實施 例，並大致沿用相同圖號，但兩者間差異之特徵在於： 該第3A圖之第一實施例係儘可能不改變原水泵轉軸21 13 201104073 之直徑’僅局部加工該第二端212形成該小徑部2i2a 及階狀部2Hb ’來匹配於_承32並避免接觸該定位 7G件34。相較之下，帛4A圖之第二實施例係藉由縮小 原水泵轉軸21之直徑或加大該軸承座31及轴承％之 尺寸，來使該水泵轉軸21之第二端212能直接插設於 該軸承34内，而不需另外加工該第二端212的既有形 狀。藉此，可增加本發明之第一支撐部A應用於不同 產品設計時之組裝設計裕度。 請參照第4B及4C圖所示，本發明第三及第四實施 例之車輛用引擎之水泵轉軸支撐構造係相似於本發明 第一及第二實施例，並大致沿用相同圖號，但其間差異 之特徵在於：該第4B圖之第三實施例的定位元件34’ 係選自一固定片，及該軸承座31之内壁設有一固定槽 33，，以插設固定該固定片，其中該固定槽33,可以選擇 形成開槽狀或是插槽狀°同時，該曲軸箱本體30在該 固定槽33,之内壁設有一螺孔（未標示），該螺孔螺設有 一螺絲35，以固定該固定槽33,内之固定片（定位元件 34，）。另一方面，該第4C圖之第四實施例的定位元件 34”係選自一螺帽，其具有外螺紋，及該轴承座31之内 壁設有内螺紋，以螺設結合該螺帽（定位元件34’，）。藉 由上述第三或第四實施例之定位元件34,或34”，本發 明之第一支撐部A同樣能穩固定位該軸承32，以提高 組裝便利用及組裝可靠度、增加轉動穩定性及減少轉動 異音。 201104073 如上所述，相較於第2圖習用水泵軸1〇9的軸承ι〇6 存在組裝或維修拆卸時的不便性及累積組裝公差過大 或過小問題等缺點，第3至4C圖之本發明係以該曲轴 箱本體30之軸承座31内的軸承32來做為該第一支撐 部A支撐該水泵轉軸21之第二端212，及以該水泵本 體22之軸孔221來做為該第二支撐部B支撐該水泵轉 軸21之中段213，其中該軸承座31更設有該定位元件 34可供定位該軸承32，同時該軸孔221則直接利用該 曲軸箱本體30内之機油來提供潤滑效果，因此確實能 相對簡化水泵構造、提高組裝便利用及組裝可靠度、增 加轉動穩定性、減少轉動異音，並延長使用壽命。 雖然本發明已以較佳實施例揭露，然其並非用以限 制本發明，任何熟習此項技藝之人士，在不脫離本發明 之精神和範圍内，當可作各種更動與修飾，因此本發明 之保護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 第1圖：習用摩托車發動機水泵之組合剖視圖。 第2圖.習用摩托車水栗之紐^合剖視圖。 第3圖：本發明第一實施例之車輛用引擎之水泵轉軸支 撐構造之組合剖視圖。 第3A圖：本發明第3圖之局部放大圖。 第3B圖：本發明第3圖之錢本㈣表面的局部放大 立體圖。 201104073 第4A圖：本發明第二實施例之車輛用引擎之水泵轉軸 支撐構造第一支撐部之局部放大圖。 第4B圖：本發明第三實施例之車輛用引擎之水泵轉軸 支撐構造第一支撐部之局部放大圖。 第4C圖：本發明第四實施例之車輛用引擎之水泵轉軸 支撐構造第一支撐部之局部放大圖。 【主要元件符號說明】 101 泵體 102 進水通道 103 泵蓋 104骨架油封 105 軸承 106 軸承 107出水通道 108 泵腔 109 水泵轴 110 葉輪 111 軸用擋圈 112 齒輪 113 曲軸箱蓋 114 機械密封機構 115 密封圈 116 彈性密封膠套 117 彈簧 118 石墨環 119 陶瓷環 120 密封圈 121 曲軸箱本體 122 階狀部 20 水泵模組 21 水泵轉軸 211 第一端 212 第二端 212a 小徑部 212b >階狀部 213 中間區段 22 水泵本體 220 組裝孔 221 軸孔 201104073 222 入油缺口 23 水泵蓋體 231 入水通道 25 齒輪 260 油封環槽 30 曲軸箱本體 32 軸承 33, 固定槽 34, 定位元件 35 螺絲 B 第二支撐部 223 回油缺口 230 腔室 24 葉輪 26 彈性密封機構 261 油封 31 轴承座 33 環狀凹槽 34 定位元件 34” 定位元件 A 第一支撐部11 201104073 Rotate relative to the water pump body 22. During operation of the engine, lubricating oil (ie, oil) in the crankcase body 30 may penetrate into the shaft hole 221 of the water pump body 22 to lubricate the inner wall thereof, thereby reducing the friction between the water pump shaft 21 and the shaft hole 221. . In the present invention, since the second branch portion B directly supports the water pump shaft 21' by the shaft hole 221, the arrangement of the bearing can be omitted, and the configuration of the second support portion B can be relatively simplified. Furthermore, the inner wall of the shaft hole 221 is preferably formed with at least one oil inlet opening 222'. The oil inlet notch 222 is used to further increase the efficiency of guiding the lubricating oil into the shaft hole 221. Preferably, the inner wall of the shaft hole 221 of the water pump body 22 is formed with at least one oil cutout 223 to guide the lubricating oil out of the shaft hole 221. The oil inlet gap 222 and the oil outlet gap 223 are preferably located on opposite sides of the shaft hole 221, and the area of the oil inlet gap 222 is preferably larger than the area of the oil outlet gap 223. Referring to FIG. 3 again, the water pump cover body 23 of the first embodiment of the present invention is a cover body made of metal, which can be assembled and coupled to the water tube body 22 or directly formed with the water pump body 22. . The water pump cover body 23 is disposed outside the water pump body 22, and a chamber 230 is formed in the interior of the water pump cover body 23 to communicate with one of the assembly holes 220 of the water pump body 22. The water pump cover 23 is provided with a water inlet passage 231 and a water outlet passage (not shown) for introducing water into the chamber 230 and deriving the chamber 230, respectively. Furthermore, the impeller 24 is coupled to the first end 211 of the water pump shaft 21 and is located in the chamber 230 of the water pump cover 23. The impeller 24 has a plurality of vanes (not labeled) for driving the circulating flow of water. In addition, the gear 25 is coupled to the adjacent section of the second end 112 of the water pump shaft 21, wherein the crankshaft (not shown) in the crankcase body 30 can be coupled via at least one interlocking gear (not shown). The gear 25 and the water pump shaft 21 are driven to rotate. It should be noted that, in the present invention, the first supporting portion A and the second supporting portion B are respectively located on two sides of the gear 25, so that the double-sided supporting effect can be provided, and the rotation caused by the rotation of the gear 25 can be effectively improved. Turn the balance problem to increase rotational stability and reduce running noise. The elastic sealing mechanism 26 of the first embodiment of the present invention is mounted in the assembly hole 220 of the water pump body 22 and interposed between the impeller 24 and the shaft hole 221, as shown in FIGS. 3, 3A and 3B. In order to ensure that the impeller 24 is rotating, the water on the impeller 24 side does not leak into the crankcase body 30 through the slit. In the present invention, the elastic sealing mechanism 26 is of a conventional construction of a general water pump, and thus its detailed construction will not be described in detail. However, in the present embodiment, the elastic sealing mechanism 26 includes an oil seal 261 having an oil seal ring groove 260 that communicates with the oil inlet notch 222 and the oil discharge notch 223. After the oil inlet notch 222 of the water pump body 22 introduces the lubricating oil into the shaft hole 221, the lubricating oil will flow into the oil seal ring groove 260, and then flow back into the crankcase body 30 via the oil discharge notch 223. Referring to FIG. 4A, the water pump shaft support structure of the vehicle engine according to the second embodiment of the present invention is similar to the first embodiment of the present invention, and substantially uses the same figure number, but the difference between the two is characterized by: The first embodiment of FIG. 3A does not change the diameter of the original water pump shaft 21 13 201104073 as much as possible. 'The second end 212 is only partially processed to form the small diameter portion 2i2a and the step portion 2Hb' to match the _ bearing 32 and Avoid contact with the positioning 7G member 34. In contrast, the second embodiment of FIG. 4A can directly insert the second end 212 of the water pump shaft 21 by reducing the diameter of the original water pump shaft 21 or increasing the size of the bearing housing 31 and the bearing %. It is disposed within the bearing 34 without the additional processing of the existing shape of the second end 212. Thereby, the assembly design margin of the first support portion A of the present invention applied to different product designs can be increased. Referring to FIGS. 4B and 4C, the water pump shaft support structure of the vehicle engine according to the third and fourth embodiments of the present invention is similar to the first and second embodiments of the present invention, and generally uses the same drawing number, but in the meantime. The difference is characterized in that the positioning member 34' of the third embodiment of the fourth embodiment is selected from a fixing piece, and the inner wall of the bearing housing 31 is provided with a fixing groove 33 for inserting and fixing the fixing piece, wherein the fixing piece The fixing groove 33 can be formed into a slotted shape or a slot shape. The crankcase body 30 is provided with a screw hole (not labeled) on the inner wall of the fixing slot 33. The screw hole is provided with a screw 35. The fixing groove 33, the fixing piece (positioning member 34) in the fixing groove 33 is fixed. On the other hand, the positioning member 34" of the fourth embodiment of the fourth embodiment is selected from a nut having an external thread, and the inner wall of the bearing housing 31 is provided with an internal thread for screwing the nut ( The positioning member 34', by the positioning member 34 of the third or fourth embodiment, or 34", the first supporting portion A of the present invention can also stably fix the bearing 32 to improve assembly convenience and assembly reliability. Degree, increase rotational stability and reduce rotational noise. 201104073 As described above, the bearing 〇6 of the conventional water pump shaft 1〇9 of FIG. 2 has disadvantages such as inconvenience in assembly or maintenance disassembly, and excessive or excessive assembly tolerance, and the present invention is the third to fourth embodiments. The bearing 32 in the bearing housing 31 of the crankcase body 30 serves as the first support portion A to support the second end 212 of the water pump shaft 21, and the shaft hole 221 of the water pump body 22 serves as the first The second support portion B supports the middle portion 213 of the water pump shaft 21, wherein the bearing block 31 is further provided with the positioning member 34 for positioning the bearing 32, and the shaft hole 221 is directly provided by the oil in the crankcase body 30. The lubrication effect makes it possible to simplify the pump construction, improve assembly convenience and assembly reliability, increase rotational stability, reduce rotational noise, and extend service life. The present invention has been disclosed in its preferred embodiments, and is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application. [Simple description of the drawing] Fig. 1: A sectional view of the combination of the conventional motorcycle engine water pump. Fig. 2 is a cross-sectional view of a conventional motorcycle water chestnut. Fig. 3 is a sectional view showing the combination of the water pump shaft supporting structure of the engine for a vehicle according to the first embodiment of the present invention. Fig. 3A is a partial enlarged view of Fig. 3 of the present invention. Fig. 3B is a partially enlarged perspective view showing the surface of the money (4) of Fig. 3 of the present invention. 201104073 Fig. 4A is a partially enlarged view showing the first support portion of the water pump shaft support structure of the vehicle engine according to the second embodiment of the present invention. Fig. 4B is a partially enlarged view showing the first support portion of the water pump shaft support structure of the vehicle engine according to the third embodiment of the present invention. Fig. 4C is a partially enlarged view showing the first support portion of the water pump shaft support structure of the vehicle engine according to the fourth embodiment of the present invention. [Main component symbol description] 101 Pump body 102 Inlet passage 103 Pump cover 104 skeleton oil seal 105 Bearing 106 Bearing 107 water outlet passage 108 Pump chamber 109 Pump shaft 110 Impeller 111 Shaft retaining ring 112 Gear 113 Crankcase cover 114 Mechanical seal mechanism 115 Sealing ring 116 Elastic sealing rubber sleeve 117 Spring 118 Graphite ring 119 Ceramic ring 120 Sealing ring 121 Crankcase body 122 Step 20 Water pump module 21 Pump shaft 211 First end 212 Second end 212a Small diameter part 212b > Step Section 213 Intermediate section 22 Pump body 220 Assembly hole 221 Shaft hole 201104073 222 Oil inlet notch 23 Pump cover 231 Water inlet channel 25 Gear 260 Oil seal ring groove 30 Crankcase body 32 Bearing 33, fixing groove 34, positioning element 35 Screw B Two support portion 223 oil return notch 230 chamber 24 impeller 26 elastic sealing mechanism 261 oil seal 31 bearing seat 33 annular groove 34 positioning member 34" positioning member A first support portion