JP5076795B2 - water pump - Google Patents

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JP5076795B2
JP5076795B2 JP2007262118A JP2007262118A JP5076795B2 JP 5076795 B2 JP5076795 B2 JP 5076795B2 JP 2007262118 A JP2007262118 A JP 2007262118A JP 2007262118 A JP2007262118 A JP 2007262118A JP 5076795 B2 JP5076795 B2 JP 5076795B2
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peripheral portion
shaft
pulley
inner peripheral
face plate
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JP2009091946A (en
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俊宏 牧
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/08—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/44—Centrifugal pumps

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

本発明は、車両のエンジンへの冷却水供給等に用いられるウォーターポンプに関する。   The present invention relates to a water pump used for supplying cooling water to a vehicle engine.

図５は、車両のエンジンへの冷却水供給等に用いられるウォーターポンプの従来例を示したものである。
このウォーターポンプ１は、ポンプハウジング３に一体形成された円筒状の軸挿通部４の外周に、軸受６を介してプーリ８が回転自在に支持されている。
プーリ８は、軸受６を介して軸挿通部４の外周に回転自在に支持される円筒部９と、この円筒部９の端部に連設されて軸挿通部４の開口端側を覆う端面板１０とを備えている。 FIG. 5 shows a conventional example of a water pump used for supplying cooling water to a vehicle engine.
In the water pump 1, a pulley 8 is rotatably supported via a bearing 6 on the outer periphery of a cylindrical shaft insertion portion 4 formed integrally with the pump housing 3.
The pulley 8 includes a cylindrical portion 9 that is rotatably supported on the outer periphery of the shaft insertion portion 4 via a bearing 6, and an end that is connected to the end portion of the cylindrical portion 9 and covers the opening end side of the shaft insertion portion 4. A face plate 10 is provided.

そして、ポンプハウジング３内のインペラ１３のシャフト１４が、軸挿通部４を挿通して、軸挿通部４の開口端側を覆っているプーリ８の端面板１０に結合一体化されている。   The shaft 14 of the impeller 13 in the pump housing 3 is combined and integrated with the end face plate 10 of the pulley 8 that passes through the shaft insertion portion 4 and covers the opening end side of the shaft insertion portion 4.

図示例の場合、シャフト１４は、金属板のプレス成形により形成された中空構造で、プーリ８の端面板１０と一体成形されており、インペラ１３には、インペラの中心部の凹部１３ａに圧入により固着されている。   In the case of the illustrated example, the shaft 14 is a hollow structure formed by press molding of a metal plate, and is integrally formed with the end face plate 10 of the pulley 8. The impeller 13 is press-fitted into a recess 13 a at the center of the impeller. It is fixed.

以上のウォーターポンプ１は、プーリ８の円筒部９の外周面にエンジン出力で駆動されるベルト（不図示）が巻き掛けられており、プーリ８に入力される回転力でインペラ１３が駆動される。   In the water pump 1 described above, a belt (not shown) driven by engine output is wound around the outer peripheral surface of the cylindrical portion 9 of the pulley 8, and the impeller 13 is driven by the rotational force input to the pulley 8. .

このようなウォーターポンプ１では、ポンプハウジング３内の冷却水や水蒸気がシャフト１４と軸挿通部４との間の隙間を伝ってプーリ８側に漏出することを防止するため、シャフト１４と軸挿通部４との間にはメカニカルシール等の軸シール１６を装着して、該部分の水密性を確保するようにしている。
しかし、軸シール１６を設けていても、完全には封止できず、微小量の冷却水や水蒸気が、軸シール１６を通過して、端面板１０側に漏れ出す。 In such a water pump 1, in order to prevent cooling water and water vapor in the pump housing 3 from leaking to the pulley 8 side through the gap between the shaft 14 and the shaft insertion portion 4, the shaft 14 is inserted into the shaft. A shaft seal 16 such as a mechanical seal is mounted between the portion 4 and the water-tightness of the portion is ensured.
However, even if the shaft seal 16 is provided, it cannot be completely sealed, and a minute amount of cooling water or water vapor passes through the shaft seal 16 and leaks to the end face plate 10 side.

そこで、従来では、端面板１０側に漏れてきた冷却水や水蒸気を速やかに外部に排出するべく、端面板１０や円筒部９の一部に、排水孔１８を設けるようにしている（例えば、特許文献１、特許文献２参照）。   Therefore, conventionally, a drain hole 18 is provided in a part of the end face plate 10 or the cylindrical portion 9 in order to quickly discharge the cooling water or water vapor leaking to the end face plate 10 side (for example, (See Patent Document 1 and Patent Document 2).

特開２００３−２３９８９０号公報JP 2003-239890 A 特開２００４−１１６４８７号公報JP 2004-116487 A

ところが、従来のウォーターポンプ１の場合、プーリ８の端面板１０は、全域がシャフト１４に直交する一様な垂直壁で、回転中に端面板１０側に漏れだした冷却水や水蒸気による水滴は、端面板１０の内周部に付着すると、遠心力による慣性で端面板１０上を外周に向かって流れるが、その際に、慣性方向と直交している端面板１０上の排水孔１８からは排出され難く（排水効率が悪く）、端面板１０上を伝う水滴が端面板１０と円筒部９が交差する端面板外周の隅部１９に滞留し易い。そして、この隅部１９は、軸受６に近接しているため、該隅部１９に滞留する水滴の一部が軸受６内に侵入することにより、軸受６内に錆を発生させ、軸受６の性能低下又は破損を招くという問題があった。   However, in the case of the conventional water pump 1, the end plate 10 of the pulley 8 is a uniform vertical wall whose entire area is orthogonal to the shaft 14, and water droplets due to cooling water or water vapor leaking to the end plate 10 side during rotation are not generated. When adhering to the inner peripheral portion of the end face plate 10, it flows toward the outer periphery on the end face plate 10 due to inertia due to centrifugal force. At this time, from the drain hole 18 on the end face plate 10 orthogonal to the inertia direction, It is difficult to be discharged (the drainage efficiency is poor), and water droplets traveling on the end plate 10 tend to stay in the corner 19 on the outer periphery of the end plate where the end plate 10 and the cylindrical portion 9 intersect. Since the corner 19 is close to the bearing 6, a part of water droplets staying in the corner 19 enters the bearing 6, thereby generating rust in the bearing 6. There has been a problem of causing performance degradation or damage.

そこで、本発明の目的は上記課題を解消することに係り、軸受付近となる端面板に水滴が滞留する不具合を無くして、滞留した水滴の侵入による軸受の錆発生や性能低下、又は破損を防止できるウォーターポンプを提供することにある。   Therefore, an object of the present invention is to eliminate the above-mentioned problems, eliminate the problem of water droplets remaining on the end plate near the bearing, and prevent bearing rusting, performance degradation, or damage due to the intrusion of the retained water droplets. It is to provide a water pump that can be used.

上記目的は、ポンプハウジングに形成された円筒状の軸挿通部の外周に、軸受を介してプーリが回転自在に支持されると共に、前記ポンプハウジング内のインペラのシャフトが、前記軸挿通部の開口端側を覆っている前記プーリの端面板に結合一体化されて、前記プーリに入力される回転力で前記インペラが駆動され、前記シャフトと前記軸挿通部との間には軸シールが装着されるウォーターポンプであって、前記プーリの端面板は、前記シャフトとの結合部から垂直面を介さず斜め外方に延出する内周部と、この内周部の外周から傾きを違えて延出する外周部と、を備えて、前記内周部と前記外周部とにより径方向の部位に外方に凸の屈曲部を形成した構造とし、且つ、前記屈曲部には、前記内周部と前記外周部とに跨って開孔して内外を連通させる排水孔を形成し、前記排水孔を、前記端面板の回転時に外部へ抜ける気流を発生させる蒲鉾形にしたことを特徴とするウォーターポンプの構成により達成される。 The above object is that a pulley is rotatably supported via a bearing on the outer periphery of a cylindrical shaft insertion portion formed in the pump housing, and the shaft of the impeller in the pump housing is an opening of the shaft insertion portion. The impeller is coupled and integrated with the end face plate of the pulley covering the end side, the impeller is driven by the rotational force input to the pulley, and a shaft seal is mounted between the shaft and the shaft insertion portion. The pulley end face plate has an inner peripheral portion extending obliquely outward from a connecting portion with the shaft without passing through a vertical surface, and an inclined portion extending from an outer periphery of the inner peripheral portion. An outer peripheral portion that protrudes, and the inner peripheral portion and the outer peripheral portion have a structure in which an outwardly convex bent portion is formed at a radial portion, and the bent portion includes the inner peripheral portion. And a hole across the outer periphery Drainage hole to pass is formed, the drain hole is accomplished by the configuration of the water pump, characterized in that the Kamabokogata to generate an airflow passing to the outside during rotation of the end sheet.

上記に記載のウォーターポンプでも、プーリの端面板の内周部に付着した水滴は、回転中の遠心力及び水滴の粘性により、端面板の内面を伝って外周側に移動する。
しかし、端面板の内周部は、シャフトとの結合部から斜め外方に延出しているため、内周部を伝う水滴には、軸方向外方に向かう分力が作用する。
更に、端面板の内周部と外周部との境は、屈曲部となっていて、該屈曲部を乗り越えるにはより大きな慣性力の作用が必要となるため、端面板の内周部を伝った水滴は外周部に留まり易い。そして、内周部の傾斜により発生した軸方向外方に向かう分力のため、屈曲部に到達した水滴は、該屈曲部に設けられた排水孔から外部に効率良く排出される。
そのため、プーリの端面板の内周部に付着した水滴が、端面板の内面を伝って、軸受付近となる端面板の外周側隅部に滞留する不具合を解消することができ、水滴の侵入による軸受の錆発生や性能低下、又は破損を防止することができる。
また、排水孔の形状を、端面板の回転時に外部へ抜ける気流を発生させる蒲鉾形にしたことによって、端面板のシャフトとの結合部付近から端面板の屈曲部に到達した水滴の排出効率を更に高めることができ、軸受の錆発生や性能低下、又は破損を防止する効果を更に高めることができる。 Even in the water pump described above, the water droplets adhering to the inner peripheral portion of the end plate of the pulley move to the outer peripheral side along the inner surface of the end plate due to the centrifugal force during rotation and the viscosity of the water droplet.
However, since the inner peripheral portion of the end face plate extends obliquely outward from the coupling portion with the shaft, a component force directed outward in the axial direction acts on the water droplets traveling along the inner peripheral portion.
Furthermore, the boundary between the inner peripheral portion and the outer peripheral portion of the end face plate is a bent portion, and a larger inertia force is required to overcome the bent portion. Water droplets tend to stay on the outer periphery. Then, due to the axially outward force generated by the inclination of the inner peripheral portion, the water droplets that have reached the bent portion are efficiently discharged to the outside from the drain holes provided in the bent portion.
Therefore, the problem that water droplets adhering to the inner peripheral portion of the end face plate of the pulley travels along the inner surface of the end face plate and stays at the outer peripheral side corner of the end face plate near the bearing can be eliminated. It is possible to prevent rust generation, performance degradation, or breakage of the bearing.
In addition, the drain hole has a bowl shape that generates an airflow that flows outside when the end face plate rotates, so that the efficiency of discharging water droplets that reach the bent part of the end face plate from the vicinity of the joint with the shaft of the end face plate is improved. The effect of preventing the occurrence of rust generation, performance degradation, or breakage of the bearing can be further enhanced.

以下、本発明に係るウォーターポンプの好適な実施の形態について、図面を参照して詳細に説明する。
図１は本発明に係るウォーターポンプの第１の実施の形態の要部の縦断面図、図２は図１のＡ矢視図で、プーリの端面板の正面図である。 Hereinafter, preferred embodiments of a water pump according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an essential part of a first embodiment of a water pump according to the present invention, and FIG. 2 is a front view of an end face plate of a pulley as viewed from the direction of arrow A in FIG.

この第１の実施の形態のウォーターポンプ２１は、車両のエンジンへの冷却水供給等に用いられるウォーターポンプである。
このウォーターポンプ２１は、ポンプハウジング３に一体形成された円筒状の軸挿通部４の外周に、軸受６を介してプーリ２３が回転自在に支持されている。
プーリ２３は、軸受６を介して軸挿通部４の外周に回転自在に支持される円筒部２４と、この円筒部２４の端部に連設されて軸挿通部４の開口端側を覆う端面板２５と、円筒部２４と同心に端面板２５の内周部に一体装備されて後述のインペラのシャフトに固定一体化される内筒部２６とを備えている。 The water pump 21 according to the first embodiment is a water pump used for supplying cooling water to an engine of a vehicle.
In this water pump 21, a pulley 23 is rotatably supported via a bearing 6 on the outer periphery of a cylindrical shaft insertion portion 4 formed integrally with the pump housing 3.
The pulley 23 has a cylindrical portion 24 that is rotatably supported on the outer periphery of the shaft insertion portion 4 via the bearing 6, and an end that is connected to the end portion of the cylindrical portion 24 and covers the opening end side of the shaft insertion portion 4. A face plate 25 and an inner cylinder portion 26 that is provided integrally with an inner peripheral portion of the end face plate 25 concentrically with the cylindrical portion 24 and fixed and integrated with a shaft of an impeller described later are provided.

そして、ポンプハウジング３内のインペラ１３のシャフト１４が、軸挿通部４を挿通して内筒部２６に嵌入し、内筒部２６を介してプーリ２３の端面板２５に結合一体化されている。   Then, the shaft 14 of the impeller 13 in the pump housing 3 is inserted through the shaft insertion portion 4 and fitted into the inner cylinder portion 26, and is coupled and integrated with the end face plate 25 of the pulley 23 via the inner cylinder portion 26. .

ウォーターポンプ２１は、プーリ２３の円筒部２４の外周面にエンジン出力で駆動されるベルト２８が巻き掛けられており、ベルト２８によりプーリ２３に入力される回転力でインペラ１３が駆動される。   In the water pump 21, a belt 28 driven by engine output is wound around the outer peripheral surface of the cylindrical portion 24 of the pulley 23, and the impeller 13 is driven by the rotational force input to the pulley 23 by the belt 28.

このウォーターポンプ２１では、ポンプハウジング３内の冷却水や水蒸気がシャフト１４と軸挿通部４との間の隙間を伝ってプーリ２３側に漏出することを防止するため、シャフト１４と軸挿通部４との間にはメカニカルシール等の軸シール１６を装着して、該部分の水密性を確保するようにしている。
しかし、軸シール１６を設けていても、完全には封止できず、微小量の冷却水や水蒸気が、軸シール１６を通過して、端面板２５側に漏れ出す。 In this water pump 21, in order to prevent cooling water or water vapor in the pump housing 3 from leaking to the pulley 23 side through the gap between the shaft 14 and the shaft insertion portion 4, the shaft 14 and the shaft insertion portion 4. A shaft seal 16 such as a mechanical seal is mounted between the two to ensure the watertightness of the portion.
However, even if the shaft seal 16 is provided, it cannot be completely sealed, and a minute amount of cooling water or water vapor passes through the shaft seal 16 and leaks to the end face plate 25 side.

そこで、本実施の形態のウォーターポンプ２１の場合は、プーリ２３の端面板２５は、シャフト１４との結合部である内筒部２６から斜め外方に傾斜状態で延出する内周部２５ａと、この内周部２５ａの外周から傾きを違えてシャフト１４に直交する垂直方向に延出する外周部２５ｂとで、径方向の部位に外方に凸の屈曲部２５ｃを形成した構造としている。   Therefore, in the case of the water pump 21 of the present embodiment, the end face plate 25 of the pulley 23 includes an inner peripheral portion 25a that extends obliquely outward from the inner cylinder portion 26 that is a coupling portion with the shaft 14, and The outer peripheral portion 25b extends in the vertical direction perpendicular to the shaft 14 with a different inclination from the outer periphery of the inner peripheral portion 25a, and has a structure in which an outwardly convex bent portion 25c is formed in a radial portion.

そして、端面板２５側に漏れてきた冷却水や水蒸気を速やかに外部に排出するべく、屈曲部２５ｃには、周方向に適宜間隔で、内外を連通させる排水孔２９を形成している。
本実施の形態の場合、排水孔２９は、図２に示すように、円形孔になっている。 And in order to discharge | emit the cooling water and water vapor | steam which leaked to the end surface board 25 side outside rapidly, the drainage hole 29 which connects the inside and outside is formed in the bending part 25c in the circumferential direction at appropriate intervals.
In the present embodiment, the drain hole 29 is a circular hole as shown in FIG.

以上に説明した本実施の形態のウォーターポンプ２１でも、軸挿通部４を挿通するインペラ１３のシャフト１４と軸挿通部４との間の軸シール１６を通過した冷却水や水蒸気は、水滴となって、シャフト１４が結合されているプーリ２３の端面板２５の内周部２５ａに付着する。
そして、内周部２５ａに付着した水滴３１は、回転中の遠心力及び水滴３１の粘性により、端面板２５の内面を伝って外周側に移動する。 Also in the water pump 21 of the present embodiment described above, the cooling water or water vapor that has passed through the shaft seal 16 between the shaft 14 of the impeller 13 that passes through the shaft insertion portion 4 and the shaft insertion portion 4 becomes water droplets. Then, it adheres to the inner peripheral portion 25a of the end face plate 25 of the pulley 23 to which the shaft 14 is coupled.
And the water droplet 31 adhering to the inner peripheral part 25a moves to the outer peripheral side along the inner surface of the end face plate 25 by the centrifugal force during rotation and the viscosity of the water droplet 31.

ところが、本実施の形態のウォーターポンプ２１では、端面板２５の内周部２５ａは、シャフト１４との結合部から斜め外方に延出しているため、内周部２５ａを伝う水滴３１には、図示のように、内周部２５ａの斜面に沿う慣性力Ｆの分力として、軸方向外方に向かう分力ｆｔが作用する。   However, in the water pump 21 of the present embodiment, the inner peripheral portion 25a of the end face plate 25 extends obliquely outward from the coupling portion with the shaft 14, so that the water droplet 31 transmitted through the inner peripheral portion 25a has As shown in the figure, a component force ft directed outward in the axial direction acts as a component force of the inertial force F along the slope of the inner peripheral portion 25a.

更に、端面板２５の内周部２５ａと外周部２５ｂとの境は、屈曲部２５ｃとなっていて、該屈曲部２５ｃを乗り越えるにはより大きな慣性力Ｆの作用が必要となるため、端面板２５の内周部２５ａを伝った水滴３１は屈曲部２５ｃに留まり易い。そして、内周部２５ａの傾斜により発生した軸方向外方に向かう分力ｆｔのため、図に矢印Ｘで示すように、該屈曲部２５ｃに設けられた排水孔２９から外部に効率良く排出することができる。   Further, the boundary between the inner peripheral portion 25a and the outer peripheral portion 25b of the end face plate 25 is a bent portion 25c, and a larger inertia force F is required to get over the bent portion 25c. The water droplet 31 that has traveled along the inner peripheral portion 25a of the 25 tends to stay on the bent portion 25c. Then, due to the axially outward component force ft generated by the inclination of the inner peripheral portion 25a, as shown by the arrow X in the figure, the water is efficiently discharged to the outside from the drain hole 29 provided in the bent portion 25c. be able to.

そのため、プーリ２３の端面板２５の内周部２５ａに付着した水滴３１が、端面板２５の内面を伝って、軸受付近となる端面板２５の外周側隅部２７に滞留する不具合を解消することができ、水滴の侵入による軸受６の錆発生や性能低下、又は破損を防止することができる。   Therefore, the problem that the water droplet 31 adhering to the inner peripheral portion 25a of the end face plate 25 of the pulley 23 travels along the inner surface of the end face plate 25 and stays in the outer peripheral side corner 27 of the end face plate 25 near the bearing is eliminated. It is possible to prevent the bearing 6 from being rusted, deteriorated in performance or damaged due to the ingress of water droplets.

なお、本発明に係るウォーターポンプにおいて、プーリの端面板の屈曲部に形成する排水孔の形状は、上記実施の形態に示した円形孔に限らない。
図３は、本発明に係るウォーターポンプの第２の実施の形態におけるプーリの端面板の正面図である。
この端面板２５では、内周部２５ａと外周部２５ｂとの境の屈曲部２５ｃに装備する排水孔２９を、当該端面板２５の回転時に外部へ抜ける気流Ｊを発生させる羽根形、より具体的には蒲鉾形にしている。
排水孔２９の形状を、このような蒲鉾形にしたことによって、端面板２５のシャフト１４との結合部付近から端面板２５の屈曲部２５ｃに到達した水滴３１の排出効率を更に高めることができ、軸受の錆発生や性能低下、又は破損を防止する効果を更に高めることができる。 In the water pump according to the present invention, the shape of the drain hole formed in the bent portion of the end plate of the pulley is not limited to the circular hole shown in the above embodiment.
FIG. 3 is a front view of the end face plate of the pulley in the second embodiment of the water pump according to the present invention.
In the end face plate 25, the inner peripheral portion 25a and a drainage hole 29 equipped in the bent portion 25c of the boundary between the outer peripheral portion 25b, the blade-type which generates an air current J passing to the outside during rotation of the end sheet 25, more specifically It has a saddle shape .
The shape of the drain hole 29 by the such a semicylindrical, can further enhance the discharge efficiency of the water droplet 31 reaches the bent portion 25c of the end plate 25 from the vicinity of the junction of the shaft 14 of the end plate 25 Further, it is possible to further enhance the effect of preventing rust generation, performance degradation, or breakage of the bearing.

さらに、本発明に係るウォーターポンプにおいて、プーリの端面板の屈曲部に形成する排水孔、その開口形状だけでなく、開口面積を適宜に設計変更することが可能である。   Furthermore, in the water pump according to the present invention, not only the drainage hole formed in the bent portion of the end face plate of the pulley and the opening shape thereof but also the opening area can be appropriately changed in design.

また、軸受６への水滴の侵入防止を更に徹底するために、図４のように改良することも考えられる。
図４は本発明に係るウォーターポンプの第３の実施の形態の要部の縦断面図である。
この第３の実施の形態のウォーターポンプ３３は、軸挿通部４の端面に、水切り板３５を追加装備したもので、それ以外の構成は、第１の実施の形態と共通で良い。共通の構成部分には、第１の実施の形態と共通の番号を付して、説明を省略する。 Further, in order to further prevent water droplets from entering the bearing 6, an improvement as shown in FIG. 4 can be considered.
FIG. 4 is a longitudinal sectional view of an essential part of a water pump according to a third embodiment of the present invention.
The water pump 33 according to the third embodiment is additionally provided with a draining plate 35 on the end face of the shaft insertion portion 4, and the other configuration may be the same as that of the first embodiment. The common components are denoted by the same reference numerals as in the first embodiment, and the description thereof is omitted.

この第３の実施の形態で追加した水切り板３５は、軸挿通部４の端面に沿って外径側に延出して、端面板２５に対向する軸受６の端面を、円筒部２４の内周付近まで覆うようにしたものである。
このようにすると、軸受６の端面が、端面板２５に直接露出しないため、端面板２５の内面に付着している水滴が軸受６側に飛散しても、水切り板３５により遮断されて、水滴の軸受６への侵入が更に確実に防止されることになり、水滴の侵入による軸受６の汚損防止を更に徹底することができる。 The draining plate 35 added in the third embodiment extends to the outer diameter side along the end surface of the shaft insertion portion 4, and the end surface of the bearing 6 facing the end surface plate 25 is connected to the inner periphery of the cylindrical portion 24. It is intended to cover up to the vicinity.
In this case, since the end surface of the bearing 6 is not directly exposed to the end surface plate 25, even if water droplets adhering to the inner surface of the end surface plate 25 are scattered on the bearing 6 side, the water drop plate 35 blocks the water droplets. Intrusion into the bearing 6 is more reliably prevented, and it is possible to further thoroughly prevent the bearing 6 from being contaminated by water intrusion.

なお、本発明に係るウォーターポンプにおいて、端面板の内周部と外周部との境の屈曲部の成す角度（内周部と外周部との挟角）は、上記実施の形態では約１５５°程度に設定したが、該屈曲部の挟角の具体的な角度は、上記実施の形態に限らない。
例えば、内周部２５ａの傾斜を上記実施の形態よりも増減させたり、あるいは、外周部２５ｂを実施の形態に示した垂直状態から適宜角度傾斜させた状態に変更することで、水滴が通過し難い屈曲部の挟角を選ぶと良い。 In the water pump according to the present invention, the angle formed by the bent portion at the boundary between the inner peripheral portion and the outer peripheral portion of the end face plate (the included angle between the inner peripheral portion and the outer peripheral portion) is about 155 ° in the above embodiment. However, the specific angle of the included angle of the bent portion is not limited to the above embodiment.
For example, when the inclination of the inner peripheral portion 25a is increased or decreased as compared to the above embodiment, or the outer peripheral portion 25b is changed from the vertical state shown in the embodiment to an appropriately inclined state, water drops pass through. It is good to choose the narrow angle of the bent part.

本発明に係るウォーターポンプの第１の実施の形態の要部の縦断面図である。It is a longitudinal cross-sectional view of the principal part of 1st Embodiment of the water pump which concerns on this invention. 図１のＡ矢視図で、プーリの端面板の正面図である。FIG. 2 is a front view of an end face plate of a pulley, as viewed from an arrow A in FIG. 本発明に係るウォーターポンプの第２の実施の形態におけるプーリの端面板の正面図である。It is a front view of the end face plate of the pulley in 2nd Embodiment of the water pump which concerns on this invention. 本発明に係るウォーターポンプの第３の実施の形態の要部の縦断面図である。It is a longitudinal cross-sectional view of the principal part of 3rd Embodiment of the water pump which concerns on this invention. 従来のウォーターポンプの要部の縦断面図である。It is a longitudinal cross-sectional view of the principal part of the conventional water pump.

符号の説明Explanation of symbols

３ ポンプハウジング
４ 軸挿通部
６ 軸受
１３ インペラ
１４ シャフト
１６ 軸シール
２１ ウォーターポンプ
２３ プーリ
２４ 円筒部
２５ 端面板
２５ａ 内周部
２５ｂ 外周部
２５ｃ 屈曲部
２６ 内筒部（結合部）
２８ ベルト
２９ 排水孔
３１ 水滴
３３ ウォーターポンプ
３５ 水切り板 Reference Signs List 3 Pump housing 4 Shaft insertion portion 6 Bearing 13 Impeller 14 Shaft 16 Shaft seal 21 Water pump 23 Pulley 24 Cylindrical portion 25 End face plate 25a Inner peripheral portion 25b Outer peripheral portion 25c Bending portion 26 Inner cylindrical portion (joint portion)
28 Belt 29 Drain hole 31 Water drop 33 Water pump 35 Drain plate

Claims (1)

ポンプハウジングに形成された円筒状の軸挿通部の外周に、軸受を介してプーリが回転自在に支持されると共に、前記ポンプハウジング内のインペラのシャフトが、前記軸挿通部の開口端側を覆っている前記プーリの端面板に結合一体化されて、前記プーリに入力される回転力で前記インペラが駆動され、前記シャフトと前記軸挿通部との間には軸シールが装着されるウォーターポンプであって、
前記プーリの端面板は、前記シャフトとの結合部から垂直面を介さず斜め外方に延出する内周部と、この内周部の外周から傾きを違えて延出する外周部と、を備えて、前記内周部と前記外周部とにより径方向の部位に外方に凸の屈曲部を形成した構造とし、
且つ、前記屈曲部には、前記内周部と前記外周部とに跨って開孔して内外を連通させる排水孔を形成し、
前記排水孔を、前記端面板の回転時に外部へ抜ける気流を発生させる蒲鉾形にしたことを特徴とするウォーターポンプ。 A pulley is rotatably supported through a bearing on the outer periphery of a cylindrical shaft insertion portion formed in the pump housing, and an impeller shaft in the pump housing covers the opening end side of the shaft insertion portion. A water pump in which the impeller is coupled and integrated with the end face plate of the pulley, the impeller is driven by a rotational force input to the pulley, and a shaft seal is mounted between the shaft and the shaft insertion portion. There,
The end plate of the pulley, an inner peripheral portion extending obliquely outwardly without passing through the vertical plane from the coupling portion with the shaft, and the outer peripheral portion that extends Chigae inclination from the outer periphery of the inner peripheral portion, the And having a structure in which an outwardly convex bent portion is formed in a radial portion by the inner peripheral portion and the outer peripheral portion ,
And, in the bent portion, a drainage hole is formed that opens between the inner peripheral portion and the outer peripheral portion and communicates the inside and the outside ,
The water pump according to claim 1, wherein the drainage hole has a bowl shape that generates an airflow that flows to the outside when the end face plate rotates .
JP2007262118A 2007-10-05 2007-10-05 water pump Expired - Fee Related JP5076795B2 (en)

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