WO2017094742A1 - Water pump for internal combustion engine, and internal combustion engine - Google Patents

Water pump for internal combustion engine, and internal combustion engine Download PDF

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Publication number
WO2017094742A1
WO2017094742A1 PCT/JP2016/085468 JP2016085468W WO2017094742A1 WO 2017094742 A1 WO2017094742 A1 WO 2017094742A1 JP 2016085468 W JP2016085468 W JP 2016085468W WO 2017094742 A1 WO2017094742 A1 WO 2017094742A1
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Prior art keywords
pulley
internal combustion
combustion engine
water pump
foreign matter
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PCT/JP2016/085468
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French (fr)
Japanese (ja)
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英樹 長田
英司 松島
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いすゞ自動車株式会社
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Publication of WO2017094742A1 publication Critical patent/WO2017094742A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys

Definitions

  • the present disclosure relates to an internal combustion engine water pump and an internal combustion engine including the same.
  • a water pump is known as a pump for pumping a refrigerant for cooling an internal combustion engine (see, for example, Patent Document 1).
  • a water pump including a pulley with which a power transmission belt such as a V-rib belt is engaged is also known.
  • the power transmission belt has a plurality of concave and convex belt grooves, and the outer peripheral portion of the water pump pulley has an outer peripheral groove having irregularities corresponding to the belt grooves.
  • the power transmission belt is wound around the pulley such that the belt groove of the power transmission belt engages with the outer peripheral groove of the pulley.
  • an inner peripheral groove corresponding to the unevenness of the outer peripheral groove is provided in a portion corresponding to the inner peripheral side of the outer peripheral groove of the pulley.
  • foreign matters such as water and solid matter that have entered the inside of the pulley from the outside accumulate in the inner circumferential groove, and it becomes difficult to discharge the foreign matter to the outside of the pulley.
  • This disclosure provides a water pump for an internal combustion engine and an internal combustion engine that can easily discharge foreign matter to the outside of the pulley.
  • a water pump for an internal combustion engine includes a pulley having an outer peripheral groove engaged with a belt groove of a power transmission belt at an outer peripheral portion, and the pulley has a foreign matter discharge port for discharging foreign matters inside the pulley to the outside.
  • the portion on the inner peripheral side corresponding to the outer peripheral groove of the pulley is a flat surface on which no groove is formed. .
  • the portion on the inner peripheral side corresponding to the outer peripheral groove of the pulley is a flat surface on which no groove is formed. It is difficult to collect inside. Moreover, since it has a foreign material discharge port, the foreign material which entered the inside of the pulley can be easily discharged from the foreign material discharge port to the outside of the pulley.
  • the flat surface is a diameter-enlarged shape portion that increases in diameter toward one side in the axial direction of the pulley, and the foreign matter discharge port is on the one side of the diameter-enlarged shape portion. It can be set as the structure provided in the edge part.
  • the foreign matter that has entered the inside of the pulley is easily moved to the end on one side of the enlarged-diameter portion using the centrifugal force due to the rotation of the pulley, and is easily discharged from the foreign matter discharge port. can do.
  • An internal combustion engine of the present disclosure for achieving the above object includes the above water pump. According to the internal combustion engine according to the present disclosure, since the water pump is provided, the foreign matter can be easily discharged to the outside of the pulley for the same reason as described above.
  • FIG. 1 is a partial schematic cross-sectional view showing a portion near a pulley of a water pump according to an embodiment.
  • FIG. 2 is a partial schematic cross-sectional view showing a part of the vicinity of a pulley of a water pump according to a comparative example.
  • FIG. 1 is a partial schematic cross-sectional view showing a part of the vicinity of the pulley 14 of the water pump 10 according to the present embodiment.
  • the internal combustion engine 1 including the water pump 10 is mounted on a vehicle. Although the specific kind of vehicle is not specifically limited, In this embodiment, large vehicles, such as a bus and a truck, are used.
  • the type of the internal combustion engine 1 is not particularly limited, but a diesel engine is used as an example in the present embodiment.
  • the water pump 10 is a pump for pumping a refrigerant that cools the internal combustion engine 1.
  • the water pump 10 includes a body 11, a rotating shaft 12, a bearing 13, and a pulley 14. 1 is an axis of the pulley 14 and the rotating shaft 12 (a line indicating the central axis).
  • the rotating shaft 12 is pivotally supported by a bearing 13 disposed inside the body 11.
  • the tip end of the rotating shaft 12 protrudes outside the body 11.
  • the pulley 14 is connected to the tip end portion (portion protruding from the body 11) of the rotating shaft 12 so as to rotate integrally with the rotating shaft 12.
  • An end (right end; not shown) opposite to the end (left end) to which the pulley 14 of the rotary shaft 12 is connected is a pump body (not shown) of the water pump 10. Connected).
  • a V-rib belt (not shown) as a power transmission belt is wound around the outer periphery of the pulley 14 of the water pump 10.
  • the V-rib belt is a belt having a plurality of V-shaped ribs.
  • the V-rib belt is also wound around the output shaft (for example, crankshaft) of the internal combustion engine 1.
  • the output shaft of the internal combustion engine 1 When the output shaft of the internal combustion engine 1 is rotated, the rotational power of the output shaft is conducted through the V-rib belt to rotate the pulley 14.
  • the pulley 14 rotates, the rotating shaft 12 pivotally supported by the bearing 13 rotates integrally with the pulley 14, and as a result, the pump body connected to the rotating shaft 12 is rotationally driven to pump the refrigerant.
  • An outer peripheral groove 15 that engages with a belt groove of the V-rib belt is formed on the outer peripheral portion of the pulley 14.
  • the outer circumferential groove 15 according to the present embodiment has a plurality of V-shaped irregularities corresponding to a plurality of belt grooves (V-shaped belt grooves) included in the V-rib belt.
  • a portion of the inner peripheral surface of the pulley 14 corresponding to the outer peripheral groove 15 of the pulley 14 is a groove.
  • the flat surface 16 is not formed.
  • a resin 17 is disposed on an inner peripheral side portion corresponding to the outer peripheral groove 15 of the pulley 14 according to the present embodiment, and the flat surface 16 is formed by the disposed resin 17.
  • the flat surface 16 becomes a diameter-expanded shape portion 18 that increases in diameter toward one side (in the present embodiment, the pump main body side, and the right side in FIG. 1) in the direction of the axis 100 of the pulley 14. Yes.
  • the pulley 14 includes a foreign matter discharge port 19 for discharging foreign matter inside the pulley 14 to the outside.
  • the foreign matter discharge port 19 is configured by a hole that communicates the inside and the outside of the pulley 14.
  • the foreign matter discharge port 19 is formed in a portion of the flat surface 16 of the pulley 14 or a portion communicating with the flat surface 16.
  • the foreign matter discharge port 19 according to the present embodiment is formed at a portion communicating with the flat surface 16, more specifically at an end portion on one side of the flat surface 16. That is, the foreign matter discharge port 19 according to the present embodiment is provided at one end of the enlarged diameter portion 18 as the flat surface 16 (that is, the maximum diameter portion of the enlarged diameter portion 18).
  • FIG. 2 is a partial schematic cross-sectional view partially showing the vicinity of the pulley 210 of the water pump 200 according to the comparative example.
  • the water pump 200 is different from the water pump 10 of FIG. 1 in that a pulley 210 is provided instead of the pulley 14.
  • the pulley 210 is different from the pulley 14 of FIG. 1 in that an inner peripheral groove 211 corresponding to the unevenness of the outer peripheral groove 15 is provided in a portion on the inner peripheral side corresponding to the outer peripheral groove 15.
  • the inner peripheral portion corresponding to the outer peripheral groove 15 of the pulley 14 becomes the flat surface 16 in which the inner peripheral groove 211 is not formed. Therefore, the foreign matter that has entered the inside of the pulley 14 is difficult to accumulate inside the pulley 14. And since the pulley 14 has the foreign material discharge port 19, the foreign material which entered the inside of the pulley 14 can be easily discharged from the foreign material discharge port 19 to the outside of the pulley 14.
  • the flat surface 16 is the diameter-enlarged shape portion 18 that increases in diameter toward the one side in the direction of the axis 100 of the pulley 14, and the foreign matter discharge port 19 is the diameter-enlarged shape portion 18. Since the foreign matter that has entered the inside of the pulley 14 can be easily applied to the end portion on the one side of the diameter-expanded shape portion 18 by utilizing the centrifugal force generated by the rotation of the pulley 14. The foreign matter can be easily discharged from the foreign matter discharge port 19.
  • a method of arranging the resin 17 on the inner peripheral portion is used as an example of a method of making the inner peripheral portion corresponding to the outer peripheral groove 15 of the pulley 14 the flat surface 16.
  • the method for forming the flat surface 16 is not limited to this.
  • a flat plate is arranged on the inner peripheral portion of the pulley 14, and the flat surface 16 is formed by this flat plate. It can also be formed.

Abstract

A water pump 10 for an internal combustion engine is provided with a pulley 14 having in the outer periphery thereof an outer peripheral groove 15 with which a belt groove of a power transmission belt engages, the pulley 14 has a foreign matter expulsion port 19 for expelling foreign matter inside the pulley 14 to the outside, and the inner-peripheral side portion of the pulley 14 that corresponds to the outer peripheral groove 15 is a flat surface 16 in which no groove is formed.

Description

内燃機関のウォーターポンプ及び内燃機関Internal combustion engine water pump and internal combustion engine
　本開示は、内燃機関のウォーターポンプ、及びこれを備える内燃機関に関する。 The present disclosure relates to an internal combustion engine water pump and an internal combustion engine including the same.
　従来、内燃機関を冷却する冷媒を圧送するポンプとして、ウォーターポンプが知られている（例えば特許文献１参照）。 Conventionally, a water pump is known as a pump for pumping a refrigerant for cooling an internal combustion engine (see, for example, Patent Document 1).
　また、従来、このようなウォーターポンプとして、例えばＶリブベルト等のような動力伝達ベルトが係合するプーリーを備えるウォーターポンプも知られている。具体的には、この動力伝達ベルトには、複数の凹凸からなるベルト溝が形成されており、ウォーターポンプのプーリーの外周部には、このベルト溝に対応した凹凸を有する外周溝が形成されている。そして、動力伝達ベルトのベルト溝がプーリーの外周溝に係合するようにして、動力伝達ベルトはプーリーに巻き掛けられている。動力伝達ベルトを介して動力がプーリーに伝達されることで、プーリーが回転駆動されて、ウォーターポンプは冷媒を圧送する。 Conventionally, as such a water pump, a water pump including a pulley with which a power transmission belt such as a V-rib belt is engaged is also known. Specifically, the power transmission belt has a plurality of concave and convex belt grooves, and the outer peripheral portion of the water pump pulley has an outer peripheral groove having irregularities corresponding to the belt grooves. Yes. The power transmission belt is wound around the pulley such that the belt groove of the power transmission belt engages with the outer peripheral groove of the pulley. When the power is transmitted to the pulley via the power transmission belt, the pulley is rotationally driven, and the water pump pumps the refrigerant.
日本国特開２０１３－５３６９３号公報Japanese Unexamined Patent Publication No. 2013-53693
　上述したような従来のウォーターポンプの場合、プーリーの外周溝の内周側に対応する部分に、この外周溝の凹凸に対応した内周溝が設けられている。この場合、外部からプーリーの内部に侵入した水や固形物等の異物がこの内周溝に溜まってしまい、異物をプーリーの外部に排出することが困難になってしまう。 In the case of the conventional water pump as described above, an inner peripheral groove corresponding to the unevenness of the outer peripheral groove is provided in a portion corresponding to the inner peripheral side of the outer peripheral groove of the pulley. In this case, foreign matters such as water and solid matter that have entered the inside of the pulley from the outside accumulate in the inner circumferential groove, and it becomes difficult to discharge the foreign matter to the outside of the pulley.
　本開示は、異物をプーリーの外部に容易に排出することができる内燃機関のウォーターポンプ及び内燃機関を提供する。 This disclosure provides a water pump for an internal combustion engine and an internal combustion engine that can easily discharge foreign matter to the outside of the pulley.
　本開示の内燃機関のウォーターポンプは、動力伝達ベルトのベルト溝が係合する外周溝を外周部に有するプーリーを備え前記プーリーは、前記プーリーの内部の異物を外部に排出するための異物排出口を有し、前記プーリーの前記外周溝に対応する内周側の部分は、溝が形成されていない平坦面となっている。。 A water pump for an internal combustion engine according to the present disclosure includes a pulley having an outer peripheral groove engaged with a belt groove of a power transmission belt at an outer peripheral portion, and the pulley has a foreign matter discharge port for discharging foreign matters inside the pulley to the outside. The portion on the inner peripheral side corresponding to the outer peripheral groove of the pulley is a flat surface on which no groove is formed. .
　本開示に係る内燃機関のウォーターポンプによれば、プーリーの外周溝に対応する内周側の部分は溝が形成されていない平坦面となっているので、プーリーの内部に侵入した異物がプーリーの内部に溜まり難くなっている。また、異物排出口を有するので、プーリーの内部に侵入した異物を異物排出口からプーリーの外部に容易に排出することができる。 According to the water pump of the internal combustion engine according to the present disclosure, the portion on the inner peripheral side corresponding to the outer peripheral groove of the pulley is a flat surface on which no groove is formed. It is difficult to collect inside. Moreover, since it has a foreign material discharge port, the foreign material which entered the inside of the pulley can be easily discharged from the foreign material discharge port to the outside of the pulley.
　上記構成において、前記平坦面は、前記プーリーの軸線方向で一方の側に向かうに従って拡径する拡径形状部となっており、前記異物排出口は、前記拡径形状部の前記一方の側の端部に設けられている構成とすることができる。 In the above configuration, the flat surface is a diameter-enlarged shape portion that increases in diameter toward one side in the axial direction of the pulley, and the foreign matter discharge port is on the one side of the diameter-enlarged shape portion. It can be set as the structure provided in the edge part.
　この構成によれば、プーリーの内部に侵入した異物を、プーリーの回転による遠心力を利用して拡径形状部の一方の側の端部に容易に移動させて、異物排出口から容易に排出することができる。 According to this configuration, the foreign matter that has entered the inside of the pulley is easily moved to the end on one side of the enlarged-diameter portion using the centrifugal force due to the rotation of the pulley, and is easily discharged from the foreign matter discharge port. can do.
　上記の目的を達成するための本開示の内燃機関は、上記のウォーターポンプを備える。この本開示に係る内燃機関によれば、上記のウォーターポンプを備えているので、上記と同様の理由により、異物をプーリーの外部に容易に排出することができる。 An internal combustion engine of the present disclosure for achieving the above object includes the above water pump. According to the internal combustion engine according to the present disclosure, since the water pump is provided, the foreign matter can be easily discharged to the outside of the pulley for the same reason as described above.
　本開示の内燃機関のウォーターポンプ、及びこれを備える内燃機関によれば、プーリーの内部に侵入した異物をプーリーの外部に容易に排出することができる。 According to the water pump of the internal combustion engine of the present disclosure and the internal combustion engine equipped with the water pump, foreign matter that has entered the pulley can be easily discharged to the outside of the pulley.
図１は、実施形態に係るウォーターポンプのプーリー近傍を部分的に抜き出して示す部分概略断面図である。FIG. 1 is a partial schematic cross-sectional view showing a portion near a pulley of a water pump according to an embodiment. 図２は、比較例に係るウォーターポンプのプーリー近傍を部分的に抜き出して示す部分概略断面図である。FIG. 2 is a partial schematic cross-sectional view showing a part of the vicinity of a pulley of a water pump according to a comparative example.
　以下、本開示に係る実施の形態の内燃機関のウォーターポンプ１０、及びこのウォーターポンプ１０を備える内燃機関１について図面を参照しつつ説明する。なお、図面に関しては、構成が分かり易いように実際の製品から寸法を変化させており、各部材、各部品の板厚や幅や長さなどの比率も必ずしも実際の製品の比率と一致しているとは限らない。 Hereinafter, an internal combustion engine water pump 10 according to an embodiment of the present disclosure and an internal combustion engine 1 including the water pump 10 will be described with reference to the drawings. Regarding the drawings, the dimensions are changed from the actual product so that the configuration is easy to understand, and the ratio of the thickness, width, length, etc. of each member and each component does not necessarily match the actual product ratio. Not necessarily.
　図１は、本実施形態に係るウォーターポンプ１０のプーリー１４の近傍を部分的に抜き出して示す部分概略断面図である。このウォーターポンプ１０を備える内燃機関１は、車両に搭載されている。車両の具体的な種類は特に限定されるものではないが、本実施形態においてはバスやトラック等の大型車両を用いる。内燃機関１の種類は特に限定されるものではないが、本実施形態においては一例としてディーゼルエンジンを用いる。 FIG. 1 is a partial schematic cross-sectional view showing a part of the vicinity of the pulley 14 of the water pump 10 according to the present embodiment. The internal combustion engine 1 including the water pump 10 is mounted on a vehicle. Although the specific kind of vehicle is not specifically limited, In this embodiment, large vehicles, such as a bus and a truck, are used. The type of the internal combustion engine 1 is not particularly limited, but a diesel engine is used as an example in the present embodiment.
　ウォーターポンプ１０は、内燃機関１を冷却する冷媒を圧送するためのポンプである。具体的にはウォーターポンプ１０は、ボディ１１、回転軸１２、軸受１３、及びプーリー１４を備えている。なお、図１に図示されている軸線１００は、プーリー１４及び回転軸１２の軸線（中心軸を示す線）である。回転軸１２は、ボディ１１の内部に配置された軸受１３によって軸支されている。回転軸１２の先端部はボディ１１よりも外側に突出している。プーリー１４は、この回転軸１２の先端部（ボディ１１から突出した部分）に、回転軸１２と一体となって回転するように接続している。 The water pump 10 is a pump for pumping a refrigerant that cools the internal combustion engine 1. Specifically, the water pump 10 includes a body 11, a rotating shaft 12, a bearing 13, and a pulley 14. 1 is an axis of the pulley 14 and the rotating shaft 12 (a line indicating the central axis). The rotating shaft 12 is pivotally supported by a bearing 13 disposed inside the body 11. The tip end of the rotating shaft 12 protrudes outside the body 11. The pulley 14 is connected to the tip end portion (portion protruding from the body 11) of the rotating shaft 12 so as to rotate integrally with the rotating shaft 12.
　なお、回転軸１２のプーリー１４が接続している端部（左側端部）とは反対側の端部（右側端部；これは図示されていない）は、ウォーターポンプ１０のポンプ本体（図示せず）に接続している。 An end (right end; not shown) opposite to the end (left end) to which the pulley 14 of the rotary shaft 12 is connected is a pump body (not shown) of the water pump 10. Connected).
　ウォーターポンプ１０のプーリー１４の外周部には、動力伝達ベルトとしてのＶリブベルト（図示せず）が巻き掛けられている。なお、Ｖリブベルトは、複数のＶ型のリブを有するベルトである。またＶリブベルトは、内燃機関１の出力軸（例えばクランクシャフト）にも巻き掛けられている。内燃機関１の出力軸が回転すると、この出力軸の回転動力がＶリブベルトを伝導してプーリー１４を回転させる。プーリー１４が回転すると、軸受１３に軸支された回転軸１２がプーリー１４と一体となって回転し、その結果、回転軸１２に接続したポンプ本体が回転駆動して、冷媒を圧送する。 A V-rib belt (not shown) as a power transmission belt is wound around the outer periphery of the pulley 14 of the water pump 10. The V-rib belt is a belt having a plurality of V-shaped ribs. The V-rib belt is also wound around the output shaft (for example, crankshaft) of the internal combustion engine 1. When the output shaft of the internal combustion engine 1 is rotated, the rotational power of the output shaft is conducted through the V-rib belt to rotate the pulley 14. When the pulley 14 rotates, the rotating shaft 12 pivotally supported by the bearing 13 rotates integrally with the pulley 14, and as a result, the pump body connected to the rotating shaft 12 is rotationally driven to pump the refrigerant.
　続いてプーリー１４の詳細について説明する。プーリー１４の外周部には、Ｖリブベルトのベルト溝が係合する外周溝１５が形成されている。具体的には本実施形態に係る外周溝１５は、Ｖリブベルトが有する複数のベルト溝（Ｖ型のベルト溝）に対応するような、複数のＶ型の凹凸を有している。 Next, details of the pulley 14 will be described. An outer peripheral groove 15 that engages with a belt groove of the V-rib belt is formed on the outer peripheral portion of the pulley 14. Specifically, the outer circumferential groove 15 according to the present embodiment has a plurality of V-shaped irregularities corresponding to a plurality of belt grooves (V-shaped belt grooves) included in the V-rib belt.
　また、プーリー１４の内周面のうち、プーリー１４の外周溝１５に対応する内周側の部分（すなわち、プーリー１４の内周面のうち、外周溝１５の裏側に対応する部分）は、溝が形成されていない平坦面１６となっている。 In addition, a portion of the inner peripheral surface of the pulley 14 corresponding to the outer peripheral groove 15 of the pulley 14 (that is, a portion of the inner peripheral surface of the pulley 14 corresponding to the back side of the outer peripheral groove 15) is a groove. The flat surface 16 is not formed.
　具体的には本実施形態に係るプーリー１４の外周溝１５に対応する内周側の部分には樹脂１７が配置されており、この配置された樹脂１７によって、平坦面１６が形成されている。 Specifically, a resin 17 is disposed on an inner peripheral side portion corresponding to the outer peripheral groove 15 of the pulley 14 according to the present embodiment, and the flat surface 16 is formed by the disposed resin 17.
　また、この平坦面１６は、プーリー１４の軸線１００方向で一方の側（本実施形態ではポンプ本体の側であり、図１においては右側）に向かうに従って拡径する拡径形状部１８となっている。 Further, the flat surface 16 becomes a diameter-expanded shape portion 18 that increases in diameter toward one side (in the present embodiment, the pump main body side, and the right side in FIG. 1) in the direction of the axis 100 of the pulley 14. Yes.
　また、プーリー１４は、プーリー１４の内部の異物を外部に排出するための異物排出口１９を備えている。具体的には異物排出口１９は、プーリー１４の内部と外部とを連通する孔によって構成されている。そして、この異物排出口１９は、プーリー１４の平坦面１６の部分、または平坦面１６に連通する部分に形成されている。 The pulley 14 includes a foreign matter discharge port 19 for discharging foreign matter inside the pulley 14 to the outside. Specifically, the foreign matter discharge port 19 is configured by a hole that communicates the inside and the outside of the pulley 14. The foreign matter discharge port 19 is formed in a portion of the flat surface 16 of the pulley 14 or a portion communicating with the flat surface 16.
　具体的には本実施形態に係る異物排出口１９は、平坦面１６に連通する部分、より具体的には平坦面１６の一方の側の端部に形成されている。すなわち本実施形態に係る異物排出口１９は、平坦面１６としての拡径形状部１８の一方の側の端部（すなわち、拡径形状部１８の最大径の部分）に設けられている。 Specifically, the foreign matter discharge port 19 according to the present embodiment is formed at a portion communicating with the flat surface 16, more specifically at an end portion on one side of the flat surface 16. That is, the foreign matter discharge port 19 according to the present embodiment is provided at one end of the enlarged diameter portion 18 as the flat surface 16 (that is, the maximum diameter portion of the enlarged diameter portion 18).
　続いて本実施形態の作用効果について、比較例と比較しつつ説明する。図２は、比較例に係るウォーターポンプ２００のプーリー２１０の近傍を部分的に抜き出して示す部分概略断面図である。ウォーターポンプ２００は、プーリー１４に代えてプーリー２１０を備えている点において、図１のウォーターポンプ１０と異なっている。プーリー２１０は、外周溝１５に対応する内周側の部分に、外周溝１５の凹凸に対応した内周溝２１１を備えている点において、図１のプーリー１４と異なっている。 Subsequently, the effects of the present embodiment will be described in comparison with a comparative example. FIG. 2 is a partial schematic cross-sectional view partially showing the vicinity of the pulley 210 of the water pump 200 according to the comparative example. The water pump 200 is different from the water pump 10 of FIG. 1 in that a pulley 210 is provided instead of the pulley 14. The pulley 210 is different from the pulley 14 of FIG. 1 in that an inner peripheral groove 211 corresponding to the unevenness of the outer peripheral groove 15 is provided in a portion on the inner peripheral side corresponding to the outer peripheral groove 15.
　比較例に係るウォーターポンプ２００の場合、外部からプーリー２１０の内部に侵入した異物（水や固形物等の異物）が内周溝２１１に溜まる可能性が高い。このように内周溝２１１に異物が溜まった場合、この異物をプーリー２１０の外部に排出することは困難である。 In the case of the water pump 200 according to the comparative example, there is a high possibility that foreign matter (foreign matter such as water or solid matter) that has entered the pulley 210 from the outside accumulates in the inner circumferential groove 211. When foreign matter accumulates in the inner circumferential groove 211 as described above, it is difficult to discharge the foreign matter to the outside of the pulley 210.
　これに対して、本実施形態によれば、図１で前述したように、プーリー１４の外周溝１５に対応する内周側の部分は内周溝２１１が形成されていない平坦面１６となっているので、プーリー１４の内部に侵入した異物がプーリー１４の内部に溜まり難くなっている。そして、プーリー１４が異物排出口１９を有しているので、プーリー１４の内部に侵入した異物を、この異物排出口１９からプーリー１４の外部に容易に排出することができる。 On the other hand, according to the present embodiment, as described above with reference to FIG. 1, the inner peripheral portion corresponding to the outer peripheral groove 15 of the pulley 14 becomes the flat surface 16 in which the inner peripheral groove 211 is not formed. Therefore, the foreign matter that has entered the inside of the pulley 14 is difficult to accumulate inside the pulley 14. And since the pulley 14 has the foreign material discharge port 19, the foreign material which entered the inside of the pulley 14 can be easily discharged from the foreign material discharge port 19 to the outside of the pulley 14.
　また本実施形態によれば、平坦面１６はプーリー１４の軸線１００方向で一方の側に向かうに従って拡径する拡径形状部１８となっており、異物排出口１９は、この拡径形状部１８の一方の側の端部に設けられているので、プーリー１４の内部に侵入した異物を、プーリー１４の回転による遠心力を利用して、拡径形状部１８の一方の側の端部に容易に移動させて、異物を異物排出口１９から容易に排出することができる。 Further, according to the present embodiment, the flat surface 16 is the diameter-enlarged shape portion 18 that increases in diameter toward the one side in the direction of the axis 100 of the pulley 14, and the foreign matter discharge port 19 is the diameter-enlarged shape portion 18. Since the foreign matter that has entered the inside of the pulley 14 can be easily applied to the end portion on the one side of the diameter-expanded shape portion 18 by utilizing the centrifugal force generated by the rotation of the pulley 14. The foreign matter can be easily discharged from the foreign matter discharge port 19.
　なお、本実施形態において、プーリー１４の外周溝１５に対応する内周側の部分を平坦面１６にする手法の一例として、この内周側の部分に樹脂１７を配置する手法を用いているが、平坦面１６の形成手法はこれに限定されるものではない。他の例を挙げると、樹脂１７でプーリー１４の内周側の部分を埋めるのではなく、プーリー１４の内周側の部分に平坦な板を配置して、この平坦な板によって平坦面１６を形成することもできる。 In the present embodiment, as an example of a method of making the inner peripheral portion corresponding to the outer peripheral groove 15 of the pulley 14 the flat surface 16, a method of arranging the resin 17 on the inner peripheral portion is used. The method for forming the flat surface 16 is not limited to this. As another example, instead of filling the inner peripheral portion of the pulley 14 with the resin 17, a flat plate is arranged on the inner peripheral portion of the pulley 14, and the flat surface 16 is formed by this flat plate. It can also be formed.
　以上本開示の好ましい実施形態について説明したが、本開示はかかる特定の実施形態に限定されるものではなく、特許請求の範囲に記載された本開示の要旨の範囲内において、種々の変形・変更が可能である。 Although the preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to such specific embodiments, and various modifications and changes can be made within the scope of the gist of the present disclosure described in the claims. Is possible.
　本出願は、2015年12月1日付で出願された日本国特許出願（特願2015-234830）に基づくものであり、その内容はここに参照として取り込まれる。 This application is based on a Japanese patent application (Japanese Patent Application No. 2015-234830) filed on December 1, 2015, the contents of which are incorporated herein by reference.
　本開示の内燃機関のウォーターポンプ及び内燃機関によれば、異物をプーリーの外部に容易に排出することができる。 According to the water pump and the internal combustion engine of the internal combustion engine of the present disclosure, foreign matter can be easily discharged to the outside of the pulley.
１　内燃機関
１０　ウォーターポンプ
１４　プーリー
１５　外周溝
１６　平坦面
１８　拡径形状部
１９　異物排出口 DESCRIPTION OF SYMBOLS 1 Internal combustion engine 10 Water pump 14 Pulley 15 Outer peripheral groove 16 Flat surface 18 Expanded shape part 19 Foreign matter discharge port

Claims (4)

  1. 　動力伝達ベルトのベルト溝が係合する外周溝を外周部に有するプーリー、
    　を備える内燃機関のウォーターポンプであって、
    　前記プーリーは、前記プーリーの内部の異物を外部に排出するための異物排出口を有し、
    　前記プーリーの前記外周溝に対応する内周側の部分は、溝が形成されていない平坦面となっている、
    　内燃機関のウォーターポンプ。     A pulley having an outer peripheral groove on an outer peripheral portion with which a belt groove of a power transmission belt is engaged;
    An internal combustion engine water pump comprising:
    The pulley has a foreign matter discharge port for discharging foreign matter inside the pulley to the outside,
    The inner peripheral side portion of the pulley corresponding to the outer peripheral groove is a flat surface on which no groove is formed.
    Water pump for internal combustion engine.
  2. 　前記平坦面は、前記プーリーの軸線方向で一方の側に向かうに従って拡径する拡径形状部となっており、
    　前記異物排出口は、前記拡径形状部の前記一方の側の端部に設けられている請求項１記載の内燃機関のウォーターポンプ。     The flat surface is a diameter-enlarged shape portion that expands toward one side in the axial direction of the pulley,
    The water pump for an internal combustion engine according to claim 1, wherein the foreign matter discharge port is provided at an end portion on the one side of the enlarged-diameter shape portion.
  3. 　請求項１に記載のウォーターポンプを備える内燃機関。 An internal combustion engine comprising the water pump according to claim 1.
  4. 　請求項２に記載のウォーターポンプを備える内燃機関。 An internal combustion engine comprising the water pump according to claim 2.
PCT/JP2016/085468 2015-12-01 2016-11-30 Water pump for internal combustion engine, and internal combustion engine WO2017094742A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-234830 2015-12-01
JP2015234830A JP2017101586A (en) 2015-12-01 2015-12-01 Water pump for internal combustion engine and internal combustion engine

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57137730U (en) * 1981-02-25 1982-08-28
JPH0725220U (en) * 1993-10-08 1995-05-12 株式会社小松製作所 Water pump for internal combustion engine
JP2013087855A (en) * 2011-10-18 2013-05-13 Hitachi Automotive Systems Ltd Water pump of internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57137730U (en) * 1981-02-25 1982-08-28
JPH0725220U (en) * 1993-10-08 1995-05-12 株式会社小松製作所 Water pump for internal combustion engine
JP2013087855A (en) * 2011-10-18 2013-05-13 Hitachi Automotive Systems Ltd Water pump of internal combustion engine

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