公开(公告)号：US11662010B2

公开(公告)日：2023-05-30

申请号：US17262848

申请日：2019-08-09

Applicant: NTN Corporation

Inventor： Ryou Yukishima ,  Tetsuya Yamamoto ,  Katsunori Sato

IPC: F16H55/08 ,  F16H55/17 ,  F16H1/08

CPC classification number: F16H55/0806 ,  F16H55/17 ,  F16H1/08 ,  F16H2055/0893

Abstract: A vehicle drive device uses a parallel shaft gear reducer (30) in which a gear is composed of helical gear, as a speed reducer part (B) that decelerates and outputs a rotation of an electric motor part (A). In the vehicle drive device, of meshing parts of the gears formed in the speed reducer part (B), two gears form a meshing part in which the amount of misalignment that occurs between the tooth surfaces of the two gears meshing with each other is different during driving and during coasting of a vehicle. A first tooth surface (S1) meshing with a mating tooth surface during driving is subjected to tooth surface modification, and a second tooth surface (S2) meshing with a mating tooth surface during coasting is subjected to tooth surface modification of an amount different from an amount of the tooth surface modification to the first tooth surface (S1).

公开(公告)号：US20140354044A1

公开(公告)日：2014-12-04

申请号：US14373126

申请日：2012-12-21

Applicant: NTN CORPORATION

Inventor： Tomomi Goto ,  Ryou Yukishima

IPC: H01B9/02 ,  B60L11/18

CPC classification number: H01B9/024 ,  B60K7/0007 ,  B60K17/12 ,  B60K2007/0038 ,  B60L3/0023 ,  B60L50/51 ,  B60L2210/40 ,  B60L2220/44 ,  B60L2240/36 ,  B60L2240/545 ,  H02G3/0481 ,  Y02T10/7005

Abstract: A power line (51) provided to a vehicle that drives a wheel assembly (21) by a motor (12) and connected to the motor (12) so as to be exposed outside the vehicle body (41) is covered with a protective member (52) which has mesh-type ventilating opening.

Abstract translation: 通过马达（12）驱动车轮组件（21）并与马达（12）连接以暴露在车体（41）外部的车辆的电力线（51）被覆盖有保护构件 （52），其具有网状通气开口。

公开(公告)号：US10207572B2

公开(公告)日：2019-02-19

申请号：US15568021

申请日：2016-04-18

Applicant: NTN CORPORATION

Inventor： Tomoaki Makino ,  Ryou Yukishima ,  Hidenori Karasawa ,  Isao Hirai

IPC: B60K1/02 ,  F16H1/08 ,  F16H57/023 ,  H02K7/116 ,  B60L15/20 ,  F16H55/14 ,  F16H57/02 ,  F16H57/028 ,  B60K7/00 ,  H02K5/173

Abstract: Helical gears in gear trains of speed reducers generate thrust forces in directions not to separate a speed reducer casing which has an axial three-piece structure, whereby leakage of lubricant oil from between separated surfaces in the speed reducer casing is prevented. Output gear which generates large thrust force on the final stage in each gear train of the speed reducers both generated inward forces, so that the center casing does not receive forces in directions in which the left and the right casings is separated therefrom.

公开(公告)号：US11679663B2

公开(公告)日：2023-06-20

申请号：US17268332

申请日：2019-09-09

Applicant: NTN CORPORATION

Inventor： Ryou Yukishima ,  Katsunori Sato

IPC: B60K7/00 ,  B60K17/04

CPC classification number: B60K7/0007 ,  B60K17/043

Abstract: An input gear, an output gear, an input-side intermediate gear, and an output-side intermediate gear are helical gears. The output gear and the output-side intermediate gear have a larger module than the input gear and the input-side intermediate gear. The input gear and the input-side intermediate gear have a larger twisting angle than the output gear and the output-side intermediate gear. The output gear and the output-side intermediate gear have a larger effective tooth length than the input gear and the input-side intermediate gear.