To provide a gear unit 1 for a railway vehicle that has a first bearing attachment part 8a1 and a first lid body 8a2 and prevents lubricant from leaking out to the outside of the first bearing lid 8a mounted on a first side wall 31 of a gear box to reduce the weight of the first bearing lid 8a, the gear unit being configured such that oil guide holes 10a, 10b are provided on a lower part of the first bearing attachment part 8a1 to which a first bearing 7a is internally fitted, the oil guide holes guiding lubricant leaking out from a labyrinth seal constituted between themselves and the first lid body 8a2 to the first side wall 31 of the gear box by cylindrical oil throwing members 9a, 9b externally fitted to a gear shaft 41.SOLUTION: At a portion located radially outward from a first bearing 7a on the side end part of a first bearing attachment part 8a1 of a first bearing lid 8a, an annular recess part 11 is provided; a ring 12 that closes an opening 111 of the recess part 11 is mounted in the first bearing attachment part 8a1; and oil guide holes 10a, 10b communicate with a return hole 31a provided in a first side wall 31 of a gear box via the lower part of the recess part 11.SELECTED DRAWING: Figure 3

    【課題】歯車軸41に外嵌される筒状の油切り部材9a,9bにより、第1蓋本体8a2との間で構成されるラビリンスシールから漏出する潤滑油を歯車箱の第1側壁31側に導く導油孔10a,10bが、第1軸受7aが内嵌される第1軸受取付部8a1の下部に設けられる鉄道車両用歯車装置1において、第1軸受取付部8a1と第1蓋本体8a2とを有し、歯車箱の第1側壁31に装着される第1軸受蓋8aの外へ潤滑油が漏出するのを抑制し、第1軸受蓋8aの軽量化を図る。【解決手段】第1軸受蓋8aの第1軸受取付部8a1の側端部で第1軸受7aよりも径方向外方に位置する部分に、環状の凹部11が設けられると共に、凹部11の開口111を閉塞するリング12が第1軸受取付部8a1に装着され、導油孔10a,10bが、歯車箱の第1側壁31に設けられた戻し孔31aに、凹部11の下部を介して連通する。【選択図】図3


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    Titel :

    GEAR UNIT FOR RAILWAY VEHICLE


    Weitere Titelangaben:

    鉄道車両用歯車装置


    Beteiligte:
    SHIGA RYOSUKE (Autor:in)

    Erscheinungsdatum :

    2022-06-14


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    F16H Getriebe , GEARING / B61C Lokomotiven , LOCOMOTIVES / F16C SHAFTS , Wellen / F16J Kolben , PISTONS



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