MOTOR

• Main Author: NAGATA TOSHIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 23.06.2016
• Subjects: BEARINGS; BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a motor capable of surely exerting a preload on a bearing and surely suppressing fretting wear of a rotating shaft as well.SOLUTION: A ball bearing 14 supporting a rotating shaft 21 is arranged on a base end side of a case member 11, supports the rotating shaft 21 movably in the axial direction relative to case members 11, 12 and is provided with a bias member 15 for biasing a rotor 20 to the tip side of the rotating shaft 21. The rotor 20 is formed with housing portions 22a1, 22b1 that are perforated from the surface on the base end side to the output side and open around the rotating shaft 21. The bias member 15 is housed in the housing portions 22a1, 22b1 and is arranged to be interposed between the end faces on the base end side of the housing portions 22a1, 22b1 and a bias member contact end face 14c that is the output side end face of the inner ring 14b of the ball bearing 14. The bias member contact end face 14c is applied with a surface treatment that increases a friction coefficient.SELECTED DRAWING: Figure 2 【課題】本発明の目的は、軸受に確実に予圧を与えるとともに、回転軸のフレッチング摩耗もまた確実に抑制することができるモータを提供することにある。【解決手段】回転軸２１を支持するボール軸受１４がケース部材１１の基端部側に配置されるとともに、このケース部材１１，１２に対して回転軸２１を軸方向に移動可能に支持し、ロータ２０を回転軸２１の先端側に付勢する付勢部材１５を備え、ロータ２０には、基端部側の面から出力側へと穿孔されて回転軸２１周りに開口する収容部２２ａ１，２２ｂ１が形成されている。この付勢部材１５は、収容部２２ａ１，２２ｂ１に収容されるとともに、この収容部２２ａ１，２２ｂ１の基端部側端面とボール軸受１４の内輪１４ｂの出力側端面である付勢部材接触端面１４ｃとの間に介在するよう配置されており、付勢部材接触端面１４ｃには、摩擦係数が大きくなる表面処理が施されている。【選択図】図２