BOLT FASTENING STRUCTURE FOR IN-WHEEL MOTOR DRIVE DEVICE

• Main Authors: TAMURA SHIRO, TAIKO MASAYA, SUGIURA SAORI
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2021
• 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; BLASTING; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

To provide a structure which reduces air pressure in a peripheral space of a head of a bolt that penetrates a casing of an in-wheel motor drive device.SOLUTION: A bolt fastening structure for in-wheel motor drive device comprises: a casing 39 of an in-wheel motor drive device; an adapter 41 attached to an outer wall surface of the casing 39; a head 43b and a shank 43c of a bolt which are caused to pass through an open hole 39h, that penetrates the casing 39, from an inner wall surface of the casing, engage with a female screw hole 41m provided in the adapter 41, and fasten the adapter 41 to the casing 39; a bolt cap 45 which is provided on the inner wall surface of the casing 39, covers the head 43b of the bolt, and blocks a peripheral space S of the head 43b from an internal space R of the casing 39; and a groove 43g, the open hole 39h, and the female screw hole 41m as an air passage which communicates an external space U of the casing 39 and the peripheral space S.SELECTED DRAWING: Figure 4 【課題】インホイールモータ駆動装置のケーシングを貫通するボルトに関し、ボルト頭部の周辺空間の空気圧を下げる構造を提供する。【解決手段】インホイールモータ駆動装置のケーシング３９と、ケーシング３９の外壁面に取り付けられるアダプタ４１と、ケーシング３９を貫通する貫通孔３９ｈに、ケーシングの内壁面から通されて、アダプタ４１に設けられる雌ネジ孔４１ｍに螺合し、アダプタ４１をケーシング３９に締結するボルトの頭部４３ｂ、軸部４３ｃと、ケーシング３９の内壁面に設けられてボルトの頭部４３ｂを覆い、頭部４３ｂの周辺空間Ｓをケーシング３９の内部空間Ｒから遮断するボルトキャップ４５と、ケーシング３９の外部空間Ｕと周辺空間Ｓを連通する空気路として溝４３ｇ、貫通孔３９ｈ、雌ネジ孔４１ｍを備える、インホイールモータ駆動装置用ボルト締結構造。【選択図】図４