1379943 六、發明說明： 【發明所屬之技術領域】 本發明传關於-種引擎水栗，尤指一種適用於車輛引 擎之水泵傳動軸定位結構。 【先前技術】1379943 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to an engine water chestnut, and more particularly to a water pump drive shaft positioning structure suitable for a vehicle engine. [Prior Art]
車輛例如機車引擎的設計中，引擎的出力與冷卻能力 有著直接的關係，因為引擎在運轉中會不斷的產生高熱， 該些熱量若未及時排放或散發，將使5丨擎長時間處於高溫 之狀態’將使引擎構件如汽缸體或是活塞膨脹，而使得活 塞與汽缸體間之間隙減小，隨著活塞在汽缸體内來回的作 動’即容易使兩者間的接觸摩擦増加，而造成構件的損壞， 嚴重者甚至發生卡缸的現象，使得引擎馬力輸出降低，是 以’業者不斷在研發機車W，以期能有效提昇引擎的冷 卻能力’進而使引擎產生高出力。 目前習知機車所㈣㈣擎冷卻方式大致有水冷式、 自然空冷式、強制空冷式、以及油冷式。參考圖！，習知水 冷引擎機車之冷卻水循環系統包含水㈣、冷卻水箱91、 引擎水道㈣示）、水管92辦零件。冷卻水㈣提供較 低溫的冷卻树過水管92送到料95。水㈣將傳來的冷 部水加壓送AM水道，㈣堆積於5丨擎95之高故帶走， 持適當的工作溫度。從引擎95流出的水液則 經由水管93再送回水箱91。 參考圖2,水栗90之構造包括—水栗本體9〇1 '水系葉 3 1379943 片902、水泵傳動轴903、油封904、油封905、二滚珠轴承 906,907等。油封904與油封905皆夾設於水栗本體901與水栗 傳動轴903之間，水泵葉片902與水泵傳動轴903組裝結合為 一體，水泵傳動轴903透過二滾珠轴承906,907安裝在水泵本 體901内部。 詳細而言’水泵本體901内側形成有二段差部S3，S4， 水泵傳動軸903亦形成有二段差部S1，S2，二滚珠軸承 906,907皆套設在水泵傳動轴903上。滾珠轴承906—端面同 時抵頂於水泵傳動軸903之段差部S1與水泵本體901之段差 部S3，另一端面則抵頂於水泵傳動軸9〇3上之一扣環908 » 滾珠軸承907—端面抵頂於水泵傳動轴903之段差部S2，另 一端面則抵頂於水泵本體901之段差部S4。藉此，使得水泵 傳動軸903於軸向被確實限制住。 然而，上述習知水泵結構設計造成水泵組裝方向被限 制了’其組裝順序為：先從外蓋開口 9〇9置入較小之滾珠軸 承907於水泵本體9〇1内部、將較大之滾珠軸承906套設在水 泵傳動軸903、插入水泵傳動軸9〇3。其它缺點還包括有： 水泵傳動軸903的段差部加工比較複雜，導致成本偏高；欲 拆卸整體裝置時也不方便。 II於習知水泵傳動軸定位方式有上述缺點，因此如何 改善水泵傳動軸軸向定位，為本案所欲解決之問題。 【發明内容】 本發明之引擎水泵改良結構包括一水泵本體、一水泵 4 1^/9943 傳動軸、一水泵葉片、及一定位件。水泵本體内部界定有 一容置室，容置室並於水泵本體表面開口，水泵傳動軸包 括有一内藏段與一外露段，内藏段位於容置室中，外露段 位於容置室外。 水泵葉片一體結合於水泵傳動軸。水泵傳動轴之外露 段環周地設有一凹槽，其中定位件固定於水泵本體外側並 包括有一限位部係延伸入凹槽，以軸向限制水泵傳動軸， 且限位部與凹槽之壁面徑向相間隔。 藉由上述結構設計，可以不必特別對水泵傳動軸内藏 #又進行段差加工以配合軸承達到轴向定位之目的，而是簡 單地利用外部固定之定位件來限制水泵傳動轴，如此省去 不少加工步驟及相關成本。並且，本發明之結構也有組裝 方便之特點。 上述限位部可以呈燕尾狀。定位件可以透過一鎖附件 而鎖附固定於水泵本體。引擎水泵改良結構可更包括有一 疋位銷，藉由定位銷將定位件更穩定地壓固於水泵本體。 引擎水泵改良結構可更包括一油封係夾設於水泵本體 與水泵傳動軸之間。 本發明之引擎水泵改良結構另一態樣包括一水泵本 體、一水泵傳動軸、一水泵葉片、及一定位件。水泵本體 内。卩界疋有一谷置室，容置室並於水泵本體表面開口，水 泵傳動軸包括有一内藏段與一外露段，内藏段位於容置室 中，外露段位於容置室外。 水泵葉片一體結合於水泵傳動軸。水泵傳動軸之外露 5 1379943 段環周地設有一凸緣，其中定位件固定於水泵本體並包括 有一凹槽，水泵傳動轴之凸緣延伸入凹槽以軸向限制水泵 傳動轴，凸緣與凹槽之壁面徑向相間隔。 上述定位件可透過一鎖附件而鎖附固定於水泵本體。 引擎水泵改良結構可更包括有一定位銷，藉由定位銷將定 位件壓固於水泵本體。引擎水泵改良結構可更包括一油封 係夾設於水泵本體與水泵傳動軸之間。 【實施方式】 參考圖3〜5，圖3與圖4分別為本實施例水泵剖視圖、及 其局部放大圖，圖5為水泵之水泵傳動軸與定位件立體圖。 圖中所示為用於車輛冷卻系統之水泵1〇，其主要包括有一 水泵本體11、一水泵傳動軸12、一水泵葉片13、二油封 14，15、及一定位件16β水泵本體1丨部内界定有一容置室 111，容置室111並於水泵本體丨丨表面開口，即圖中之開口 112。本例中水泵本體丨丨是與曲軸箱（圖未示）一體成型出。 水泵傳動軸12區分為一内藏段121與一外露段122，所 謂内藏段121是指位於容置室1U中之區段，外露段122則是 穿過開口 112而位於容置室lu外之區段。此外，外露段122 在鄰近内藏段121之位置還形成一環狀凹槽123。 水豕葉片13組裝結合於内藏段丨21遠離外露段122之一 ^^在水泵葉片13旁還設有二油封14,15，油封14,15皆夾設 於水泵本體U與水泵傳動轴12之間，分別負責擋水與擋油。 疋位件16為一板狀定位件，透過一鎖附件17如螺拴而 1379943 固定在水泵本體11表面。定位件16末端構成燕尾狀之限位 部161，延伸進入水泵傳動軸12之環狀凹槽123，如圖4所 示，限位部161與凹槽123之壁面徑向相間隔，其間距j)以不 妨礙水泵傳動轴12之轉動為原則。 由上述可知，藉由設於水泵本體11外側之定位件16與 水泵傳動軸12之間相互止擋之設計，水泵傳動軸12一方面 可如常轉動發揮泵水功能’另一方面藉由定位件16抑制其 軸向運動》本創作之好處不僅在於其組裝方便性，即使遇In the design of a vehicle such as a locomotive engine, the output of the engine has a direct relationship with the cooling capacity, because the engine will continuously generate high heat during operation, and if the heat is not discharged or dissipated in time, the engine will be kept at a high temperature for a long time. The state 'will cause the engine component to expand, such as the cylinder block or the piston, so that the gap between the piston and the cylinder block is reduced, and as the piston moves back and forth in the cylinder body, it is easy to increase the contact friction between the two, resulting in Damage to the components, even in the case of card cylinders, the engine horsepower output is reduced, so that the industry is constantly developing the locomotive W, in order to effectively improve the engine's cooling capacity, and thus the engine produces high output. At present, the conventional locomotive (4) (four) engine cooling methods are generally water-cooled, naturally air-cooled, forced air-cooled, and oil-cooled. Reference picture! The water cooling system of the cold engine locomotive includes water (4), cooling water tank 91, engine water channel (4), and water pipe 92. Cooling water (4) provides a lower temperature cooling tree water pipe 92 to feed 95. Water (4) will send the cold water from the pump to the AM water channel, and (4) pile up at the height of the 5 丨 95 95 and take it away, holding the proper working temperature. The water flowing out of the engine 95 is sent back to the water tank 91 via the water pipe 93. Referring to Fig. 2, the structure of the water chestnut 90 includes a water chestnut body 9〇1 'water system leaf 3 1379943 piece 902, a water pump drive shaft 903, an oil seal 904, an oil seal 905, two ball bearings 906, 907, and the like. The oil seal 904 and the oil seal 905 are respectively disposed between the water chestnut body 901 and the water chestnut transmission shaft 903. The water pump blade 902 is assembled and integrated with the water pump drive shaft 903, and the water pump drive shaft 903 is installed inside the water pump body 901 through the two ball bearings 906 and 907. . Specifically, the inside of the water pump body 901 is formed with two step portions S3, S4, and the water pump drive shaft 903 is also formed with two step portions S1, S2, and the two ball bearings 906, 907 are sleeved on the water pump drive shaft 903. The ball bearing 906 - the end surface simultaneously abuts the step S3 of the pump drive shaft 903 and the step S3 of the water pump body 901, and the other end surface abuts against the pump drive shaft 9 〇 3 on one of the buckles 908 » ball bearing 907 - The end surface abuts against the step S2 of the water pump drive shaft 903, and the other end surface abuts against the step S4 of the water pump body 901. Thereby, the water pump drive shaft 903 is surely restrained in the axial direction. However, the above-mentioned conventional pump structure design causes the pump assembly direction to be limited. The assembly sequence is as follows: firstly, a smaller ball bearing 907 is placed from the outer cover opening 9〇9 inside the water pump body 9〇1, and the larger ball is placed. The bearing 906 is sleeved on the water pump drive shaft 903 and inserted into the water pump drive shaft 9〇3. Other disadvantages include: The processing of the step of the pump drive shaft 903 is complicated, resulting in high cost; it is also inconvenient to disassemble the overall device. II. The conventional water pump drive shaft positioning method has the above disadvantages. Therefore, how to improve the axial positioning of the pump drive shaft is the problem to be solved in this case. SUMMARY OF THE INVENTION The improved structure of the engine water pump of the present invention comprises a water pump body, a water pump 4 1 / / 9943 drive shaft, a water pump blade, and a positioning member. The inside of the water pump body defines an accommodating chamber, and the accommodating chamber is open on the surface of the water pump body. The water pump drive shaft includes a built-in section and an exposed section. The inner section is located in the accommodating chamber, and the exposed section is located outside the accommodating chamber. The pump blades are integrated into the pump drive shaft. The groove of the pump drive shaft is circumferentially disposed with a groove, wherein the positioning member is fixed to the outside of the water pump body and includes a limiting portion extending into the groove to axially restrict the pump drive shaft, and the limiting portion and the groove The walls are radially spaced apart. With the above structural design, it is not necessary to specifically perform the step difference processing on the pump drive shaft built-in to match the bearing to achieve the axial positioning purpose, but simply use the externally fixed positioning member to limit the water pump drive shaft, thus eliminating the need for Less processing steps and associated costs. Moreover, the structure of the present invention is also characterized by its ease of assembly. The above limiting portion may have a dovetail shape. The positioning member can be locked and fixed to the water pump body through a lock attachment. The engine water pump improved structure may further include a clamp pin for more stably pressing the positioning member to the water pump body by the positioning pin. The engine water pump improved structure may further include an oil seal system interposed between the water pump body and the water pump drive shaft. Another aspect of the improved structure of the engine water pump of the present invention includes a water pump body, a water pump drive shaft, a water pump blade, and a positioning member. Inside the pump body. The boundary wall has a valley chamber, and the accommodation chamber is open on the surface of the water pump body. The water pump drive shaft includes a built-in section and an exposed section. The inner section is located in the accommodating chamber, and the exposed section is located outside the accommodating chamber. The pump blades are integrated into the pump drive shaft. The pump drive shaft is exposed 5 1379943. The segment ring is circumferentially provided with a flange, wherein the positioning member is fixed to the water pump body and includes a groove, and the flange of the water pump drive shaft extends into the groove to axially restrict the water pump drive shaft, the flange and the flange The walls of the grooves are radially spaced apart. The positioning member can be locked and fixed to the water pump body through a lock attachment. The engine water pump improved structure may further include a positioning pin for pressing the positioning member to the water pump body by the positioning pin. The engine water pump improved structure may further include an oil seal between the water pump body and the pump drive shaft. [Embodiment] Referring to Figs. 3 to 5, Fig. 3 and Fig. 4 are respectively a cross-sectional view of a water pump of the present embodiment, and a partial enlarged view thereof, and Fig. 5 is a perspective view of a water pump drive shaft and a positioning member of the water pump. The figure shows a water pump 1〇 for a vehicle cooling system, which mainly comprises a water pump body 11, a water pump drive shaft 12, a water pump blade 13, two oil seals 14, 15 and a positioning member 16β in the water pump body 1 An accommodating chamber 111 is defined, and the accommodating chamber 111 is opened on the surface of the water pump body ,, that is, the opening 112 in the figure. In this example, the pump body 丨丨 is integrally formed with a crankcase (not shown). The pump drive shaft 12 is divided into a built-in section 121 and an exposed section 122. The so-called built-in section 121 refers to a section located in the accommodating chamber 1U, and the exposed section 122 is located outside the accommodating chamber through the opening 112. Section of. In addition, the exposed section 122 also forms an annular groove 123 adjacent to the inner section 121. The leeches blade 13 is assembled and integrated into the inner section 丨 21 away from the exposed section 122. ^2 is further provided with two oil seals 14, 15 beside the water pump blade 13, and the oil seals 14, 15 are sandwiched between the water pump body U and the water pump drive shaft 12 Responsible for retaining water and retaining oil. The clamping member 16 is a plate-shaped positioning member that is fixed to the surface of the water pump body 11 through a lock attachment 17 such as a screw. The end of the positioning member 16 constitutes a dovetail-shaped limiting portion 161 extending into the annular groove 123 of the water pump drive shaft 12. As shown in FIG. 4, the limiting portion 161 is radially spaced from the wall surface of the groove 123, and the spacing j is ) is based on the principle that the rotation of the pump drive shaft 12 is not hindered. It can be seen from the above that, by designing the positioning member 16 disposed outside the water pump body 11 and the water pump drive shaft 12 to stop each other, the water pump drive shaft 12 can rotate as usual to exert the pumping function on the one hand. 16 inhibits its axial movement. The benefit of this creation is not only its ease of assembly, even
到需拆卸維修、更換零件之場合，因可先自外部拆卸定位 件16 ’明顯較習知結構更具方便性。 定位件16另透過一定位銷18而壓固定在水泵本體u， 鎖附件17如螺栓配合定位銷18使定位件16更為穩固，提升 軸向止擋水泵傳動軸12之功能。而燕尾狀限位部161也因止 擋接觸面積較大而具有分散衝擊負載、降低材料損耗致需 更換之優點。另外，定位件16上還開設有一長槽162供定位 銷18穿入，長槽162之設置可讓定位件16組裝時更為方便： 先以定位銷18穿人定位件16之長槽162底端，待將水果傳動 軸12插入水泵本體丨丨並使凹槽123與限位部丨^對準時，下 壓定位件16使其順長槽162方向下滑，最後限位部ΐ6ι順利 進入凹槽123。 參考圖6’為第二實施例之剖視圖。本例之水㈣結構 與第-例大致相同’包括有一水泵本體31、一水泵傳動軸 …水泉葉片33、二油封34,35、及一定位件36。水系本 體3!部内界定有-容置室3U，表面形成有開口川。 7 1379943 水泵傳動軸32同樣包括有一内藏段321與一外露段 322，水泵葉片33組裝結合於内藏段321遠離外露段322之一 端’在水栗葉片33旁同樣設有二油封34,35 ^定位件36同樣 透過一鎖附件37、與一定位銷38(穿過定位件36上之長槽 362)而固定在水泵本體31表面。 本例與第一例相異處在於水泵傳動轴32之外露段322 環周設有一環形凸緣323，定位件36形成有一凹槽361，水 泵傳動轴32之凸緣323延伸進入凹槽361，且凸緣3 23與凹槽 361之壁面徑向相間隔。如此，同樣也可發揮水泵傳動轴32 軸向止擋、定位之功效、具有組裝/拆卸之方便性。 上述實施例僅係為了方便說明而舉例而已，本發明所 主張之權利範圍自應以申請專利範圍所述為準，而非僅限 於上述實施例。 【圖式簡單說明】 圖1係習知水冷引擎機車之冷卻水循環系統。 圖2係圖1之水泵剖視圖。 圖3係本發明第一較佳實施例之水泵剖視圖。 圖4係圖3之局部放大圖。 圖5係本發明第一較佳實施例之水泵部分元件立體圖。 圖6係本發明第二較佳實施例之水泵剖視圖。 水泵本體901 【主要元件符號說明】 水泵90 1379943 水泵葉片902 油封 904, 905 扣環908 冷卻水箱91 引擎95 水泵10,30 容置室111,311 水泵傳動軸12,32 外露段12^322In the case where it is necessary to disassemble the repair and replace the parts, it is more convenient to remove the positioning member 16' from the outside. The positioning member 16 is further fixed to the water pump body u through a positioning pin 18, and the lock attachment 17 such as the bolt fitting positioning pin 18 makes the positioning member 16 more stable and enhances the function of the axial stop pump drive shaft 12. The dovetail-shaped limiting portion 161 also has the advantages of dispersing the impact load and reducing the material loss due to the large contact area of the stopper. In addition, a long slot 162 is defined in the positioning member 16 for the positioning pin 18 to penetrate. The arrangement of the long slot 162 can make the positioning member 16 more convenient to assemble: firstly, the positioning pin 18 is used to pierce the long slot 162 of the positioning member 16. At the end, when the fruit transmission shaft 12 is inserted into the water pump body and the groove 123 is aligned with the limiting portion ,^, the positioning member 16 is pressed down in the direction of the long groove 162, and finally the limiting portion ΐ6ι smoothly enters the groove. 123. Referring to Figure 6', a cross-sectional view of the second embodiment is shown. The water (4) structure of this example is substantially the same as that of the first embodiment, and includes a water pump body 31, a water pump drive shaft, a water spring blade 33, two oil seals 34, 35, and a positioning member 36. In the water system body 3!, a housing chamber 3U is defined, and an open channel is formed on the surface. 7 1379943 The water pump drive shaft 32 also includes a built-in section 321 and an exposed section 322. The water pump blade 33 is assembled and coupled to the inner section 321 away from one end of the exposed section 322. A water seal 34, 35 is also provided beside the water chestnut blade 33. The positioning member 36 is also fixed to the surface of the water pump body 31 through a lock attachment 37 and a positioning pin 38 (through the long groove 362 on the positioning member 36). The difference between this example and the first example is that the outer portion 322 of the water pump drive shaft 32 is provided with an annular flange 323 around the circumference, the positioning member 36 is formed with a recess 361, and the flange 323 of the water pump drive shaft 32 extends into the recess 361. And the flange 3 23 is radially spaced from the wall surface of the groove 361. In this way, the pump drive shaft 32 can also be used for axial stop and positioning, and has the convenience of assembly/disassembly. The above-described embodiments are merely examples for the convenience of the description, and the scope of the claims is intended to be limited by the scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cooling water circulation system of a conventional water-cooled engine locomotive. Figure 2 is a cross-sectional view of the water pump of Figure 1. Figure 3 is a cross-sectional view of a water pump in accordance with a first preferred embodiment of the present invention. Figure 4 is a partial enlarged view of Figure 3. Fig. 5 is a perspective view showing the components of the water pump of the first preferred embodiment of the present invention. Figure 6 is a cross-sectional view of a water pump in accordance with a second preferred embodiment of the present invention. Pump body 901 [Main component symbol description] Water pump 90 1379943 Water pump blade 902 Oil seal 904, 905 Buckle 908 Cooling water tank 91 Engine 95 Water pump 10, 30 Housing chamber 111, 311 Pump drive shaft 12, 32 Exposed section 12^322
II
油封 14，15, 34,35 限位部161 鎖附件17,37 環狀凹槽123 凹槽361 水泵傳動轴903 滚珠軸承906,907 開口 909 水管92,93 段差部 S1，S2,S3，S4 水泵本體11,31 開口 112,312 内藏段121，321 水泵葉片13,33 定位件16,36 長槽 162,362 定位銷18,38 凸緣323 間距DOil seal 14,15, 34,35 Limiting part 161 Locking attachment 17,37 Annular groove 123 Groove 361 Pump drive shaft 903 Ball bearing 906,907 Opening 909 Water pipe 92,93 Segment difference S1,S2,S3,S4 Water pump body 11 , 31 opening 112, 312 built-in section 121, 321 water pump blade 13, 33 locating member 16, 36 long groove 162, 362 locating pin 18, 38 flange 323 spacing D