To provide a lift axle device which can suppress a frequency of the ascent and descent of an axle.SOLUTION: A lift axle device 20 comprises: a pneumatic circuit 40 for supplying and discharging compressed air to/from a second air spring 22 and an air bellows 23 according to the presence or absence of the supply of power to an electromagnetic valve 35; and a control circuit 25 having a first switch 31 for switching the opening/closing of an electrical connecting point by first pressure, and a second switch 32 for switching the opening/closing of the electrical connecting point by second pressure which is higher than the first pressure with the pressure of the first air spring 21 as a measurement object, and controlling the presence or absence of the supply of the power to the electromagnetic valve 35. When the pressure is transited to pressure which is lower than the first pressure, the control circuit 25 transits the pneumatic circuit 40 to a lift state, when the pressure is transited to pressure which is not lower than the second pressure, the control circuit transits the pneumatic circuit 40 to a down-state, and when the pressure is transited to pressure which is not lower than the first pressure and lower than the second pressure, the control circuit controls the presence or absence of the supply of the power to the electromagnetic valve 35 so that a state before the transition is maintained.SELECTED DRAWING: Figure 2

    【課題】車軸の昇降の頻度を抑えることができるリフトアクスル装置を提供する。【解決手段】リフトアクスル装置20は、第2エアスプリング22およびエアベローズ23に対する圧縮エアの給排を電磁弁35への電力の供給の有無に応じて行う空圧回路40と、第1エアスプリング21の圧力を測定対象として第1圧力で電気接点の開閉を切り替える第1スイッチ31と第1圧力よりも高い第2圧力で電気接点の開閉を切り替える第2スイッチ32とを有して電磁弁35に対する電力の供給の有無を制御する制御回路25と、を備える。制御回路25は、圧力が第1圧力未満に遷移した場合に空圧回路40をリフト状態へ遷移させ、圧力が第2圧力以上に遷移した場合に空圧回路40をダウン状態へ遷移させ、圧力が第1圧力以上第2圧力未満に遷移した場合に遷移前の状態が維持されるように電磁弁35への電力の供給の有無を制御するように構成されている。【選択図】図2


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    Title :

    LIFT AXLE DEVICE


    Additional title:

    リフトアクスル装置


    Contributors:

    Publication date :

    2019-03-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge



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