To further prevent a lubricant L from being leaked to an outside of a gearbox 3 in a gear device 1 for railway vehicle in which a first bearing lid 8a including a first bearing mounting part 8a1 to which a first bearing 7a supporting a gear shaft 41 is internally fitted and a first lid body 8a2 provided in a side end of the first bearing mounting part 8a1 is mounted to a first sidewall 31 of the gearbox 3, an oil thrower member 9 constituting a labyrinth seal within the first lid body 8a2 is externally fitted to the gear shaft 41, a partition wall extending so as to be spread over a first partition wall 3c and a second partition wall is provided in a lower part inside of the gearbox 3, a fourth oil storage part which is partitioned from a first oil storage part and communicates a second oil storage part and a third oil storage part is defined between the partition wall and the first sidewall 31, and an oil guide hole 10 is formed in a lower part of the first bearing mounting part 8a1.SOLUTION: A return hole 31a communicating an oil guide hole 10 and a fourth oil storage part is formed in a portion of a first sidewall 31 in contact with a lower portion of an outer peripheral surface of the first bearing mounting part 8a1.SELECTED DRAWING: Figure 2
【課題】歯車箱3の第1側壁31に、歯車軸41を軸支する第1軸受7aが内嵌される第1軸受取付部8a1と、第1軸受取付部8a1の側端部に設けられる第1蓋本体8a2とを有する第1軸受蓋8aが装着され、第1蓋本体8a2内にラビリンスシールを構成する油切り部材9が歯車軸41に外嵌され、歯車箱3内の下部に、第1仕切壁3cと第2仕切壁に跨るように延在する隔壁が設けられ、隔壁と第1側壁31の間に第1油溜り部に対し隔壁で仕切られた、第2油溜り部と第3油溜り部を連通する第4油溜り部が画成され、第1軸受取付部8a1の下部に導油孔10が形成される鉄道車両用歯車装置1において、潤滑油Lが歯車箱3の外に漏出するのをより抑制する。【解決手段】第1軸受取付部8a1の外周面下部に接する第1側壁31の部分に、導油孔10と第4油溜り部を連通する戻し孔31aが形成される。【選択図】図2
GEAR DEVICE FOR RAILWAY VEHICLE
鉄道車両用歯車装置
2022-05-16
Patent
Electronic Resource
Japanese
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