PROBLEM TO BE SOLVED: To provide an expansion valve which can stably keep the sliding performance of a shaft, even if a burr is generated during the machining of a shaft insertion hole.SOLUTION: An expansion valve includes: a metallic body 2 which has a valve hole 16 provided on a coolant passage, and a valve chamber 40 provided on an upstream side of the valve hole 16 in the coolant passage; a valve body 18 provided in the valve chamber 40, and contacted/separated to/from the valve hole 16 to open/close a valve portion; a drive portion which generates drive force for opening/closing the valve body 18; and a shaft 33 provided on the body 2 so as to penetrate an insertion hole 34 coaxially provided with the valve hole 16, connected to the drive portion on one end side, connected to the valve body 18 through the valve hole 16 on the other end side, and transmitting the drive force in an axial direction by the drive portion to the valve body 18. The insertion hole 34 is formed on the body 2 by cutting, and includes a supporting portion 60 for supporting a shaft 33 and a diameter expanding portion 62 opening toward a downstream side of the valve hole 16 and having a larger diameter than the supporting portion.SELECTED DRAWING: Figure 2

    【課題】シャフト挿通孔の加工時にバリが発生したとしても、シャフトの摺動性能を安定に維持可能な膨張弁を提供する。【解決手段】ある態様の膨張弁は、冷媒通路に設けられた弁孔16と、冷媒通路における弁孔16の上流側に設けられた弁室40と、を有する金属製のボディ2と、弁室40に設けられ、弁孔16に接離して弁部を開閉する弁体18と、弁体18を開閉させるための駆動力を発生する駆動部と、ボディ2に弁孔16と同軸状に設けられた挿通孔34を貫通するように設けられ、一端側が駆動部に接続され、他端側が弁孔16を通って弁体18に接続され、駆動部による軸線方向の駆動力を弁体18に伝達するシャフト33と、を備える。挿通孔34は、切削加工によりボディ2に形成され、シャフト33を支持する支持部60と、弁孔16の下流側に向けて開口し、支持部よりも大径の拡径部62と、を含む。【選択図】図2


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    Title :

    EXPANSION VALVE


    Additional title:

    膨張弁


    Contributors:

    Publication date :

    2016-06-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / F16K VALVES , Ventile



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