VEHICLE DRIVE DEVICE

• Main Author: MYOKI AIKO
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2019
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

To reliably supply lubricating oil to a bearing for a gear which is arranged in a narrow space, with a simple structure.SOLUTION: An in-wheel motor drive device 21 comprises: an electric motor 22 for driving a wheel; a speed reducer 23 for reducing the rotation speed of the electric motor 22 and outputting the reduced speed; a bearing 24 for the wheel, for transmitting the output from the speed reducer 23 to the wheel; and a casing 25 for accommodating the speed reducer 23. The speed reducer 23 has such a structure that an intermediate gear 33 is rotatably supported by a rolling bearing 41 relative to the casing 25. A flange part 54 of the intermediate gear 33 having a tooth-tip outer diameter larger than the outer-ring outer diameter of the rolling bearing 41 is arranged in a narrow space between the opposed wall surfaces of the casing 25, and an oil passage hole 55 passing from one wall surface side of the casing 25 toward the rolling bearing 41 located on the other wall surface side is provided in the flange part 54 of the intermediate gear 33.SELECTED DRAWING: Figure 1 【課題】 簡易な構造により、狭隘な空間に配置された歯車の軸受に潤滑油を確実に供給する。【解決手段】 車輪を駆動する電動モータ２２と、その電動モータ２２の回転を減速して出力する減速機２３と、その減速機２３の出力を車輪に伝達する車輪用軸受２４と、減速機２３を収容するケーシング２５とを備えたインホイールモータ駆動装置２１であって、減速機２３は、ケーシング２５に対して転がり軸受４１により中間歯車３３を回転自在に支持した構造をなし、歯先外径が転がり軸受４１の外輪外径よりも大きい中間歯車３３のフランジ部５４が、ケーシング２５の対向壁面間の狭隘な空間に配置され、ケーシング２５の一方の壁面側から他方の壁面側に位置する転がり軸受４１に向けて貫通する通油孔５５を中間歯車３３のフランジ部５４に設ける。【選択図】 図１