PROBLEM TO BE SOLVED: To provide a step motor suppressing an operation failure.SOLUTION: A step motor 6, which rotationally drives a rotary pointer 4, comprises; an output shaft 637 that has an insertion hole part 81 into which the rotary pointer 4 is inserted integrally rotatably at a side closer to an inner periphery than a top part 80 of a tip 637b and outputs rotation driving force to the rotary pointer 4; a radial bearing 85 radially supporting the output shaft 637 from an outer periphery side; and a cover 86 protruding from the radial bearing 85 toward the inner periphery and opposing to the top part 80, at a side closer to the outer periphery than the insertion hole part 81, at an interval 860 in a shaft direction, where the top part 80 has a width in the radial direction. The output shaft 637 has an inner peripheral taper part 820 whose diameter gradually reduces as approaching the insertion hole part 81 at the inner periphery side from the top part 80. The cover 86 opposes to the top part 80 at the interval 860 in the shaft direction at a side closer to the outer periphery than the inner peripheral taper part 820.SELECTED DRAWING: Figure 6
【課題】作動不良が抑制されたステップモータの提供。【解決手段】回転指針4を回転駆動するステップモータ6は、先端637bの頂部80よりも内周側にて回転指針4が一体回転可能に挿入される挿入孔部81を有し、回転指針4に回転駆動力を出力する出力軸637と、出力軸637を外周側からラジアル支持しているラジアル軸受85と、ラジアル軸受85から内周側へ突出し、挿入孔部81よりも外周側にて頂部80と軸方向隙間860をあけて対向しているカバー86とを、備える。ここで頂部80は、径方向に幅を有する。また出力軸637は、頂部80から内周側の挿入孔部81へ近接するに従って縮径している内周テーパ部820を有し、カバー86は、内周テーパ部820よりも外周側にて頂部80と軸方向隙間860をあけて対向している。【選択図】図6
STEP MOTOR AND VEHICULAR POINTER INSTRUMENT
ステップモータ及び車両用指針計器
2018-11-15
Patent
Electronic Resource
Japanese
IPC: | H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein |
MAGNET ROTOR FOR STEP MOTOR, STEP MOTOR AND POINTER INSTRUMENT FOR VEHICLE
European Patent Office | 2022
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