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1. (WO2017168551) PLANETARY GEAR DEVICE AND VEHICLE WHEEL DRIVE DEVICE

Pub. No.:    WO/2017/168551    International Application No.:    PCT/JP2016/060059
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Wed Mar 30 01:59:59 CEST 2016
IPC: F16H 57/04
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: HASHIMOTO Michinori
橋本 迪矩
TERASAWA Hideo
寺澤 英男
Title: PLANETARY GEAR DEVICE AND VEHICLE WHEEL DRIVE DEVICE
Abstract:
A driveshaft seal plate (21) is fitted in the inner periphery of a bearing inner cylinder (29) on the side towards a first direction and is arranged with a gap in the radial direction from an oil thrower (35) fitted onto a driveshaft (39). On the side towards a second direction, a carrier seal plate (22) is fitted in the inner periphery of a bearing inner cylinder (29), and a planetary carrier (19) is inserted in said carrier seal plate (22), leaving a gap in the radial direction. A first labyrinth seal (26) is configured from: a driveshaft-side annular protrusion which is formed on one of the oil thrower (35) and the drive shaft seal plate (21) and which protrudes along the circular circumference around the driveshaft (39); and a driveshaft-side annular groove which is formed on the other of the oil thrower (35) and the drive shaft seal plate (21) and which recedes along the circular circumference. A second labyrinth seal (27) is configured from: a carrier-side annular protrusion which is formed on one of the carrier seal plate (22) and the planetary carrier (19) and which protrudes along the circular circumference around the axis of the planetary carrier (19); and a carrier-side annular groove which is formed on the other of the carrier seal plate (22) and the planetary carrier (19) and which recedes along the circular circumference. An output shaft outer cylinder (11) and a fixed ring (5) configure a third labyrinth seal (28) by forming, on surfaces opposite in the axial direction, an outer cylinder annular protrusion and an outer cylinder annular groove, and a fixed ring annular protrusion and a fixed ring annular groove, around the axis of the planetary gear device.