BEARING DEVICE WITH ROTATION SENSOR

• Main Authors: AZUMA SHINICHI, TAKANO KOJI, MATSUSHITA AKIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 17.06.2022
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MECHANICAL ENGINEERING; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; TARIFF METERING APPARATUS; TESTING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a bearing device with a rotation sensor which can inhibit reduction in detection accuracy caused by combination of a self-aligning function and a magnetic rotation sensor.SOLUTION: A bearing body 14 comprises a bearing having a self-aligning function in which an outer ring 22 moves along an arc-shaped trajectory T whose center is a bearing center C. A rotation sensor 16 comprises a magnetic encoder 44 fixed to one of an inner ring 20 and the outer ring 22 and configured to generate a magnetic field, and a magnetic sensor 52 fixed to the other of the inner ring 20 and the outer ring 22 and configured to detect a magnetic field. The magnetic encoder 44 and the magnetic sensor 52 are spaced along the radial direction of a rotation axis 12 such that axes of the inner ring 20 and the outer ring 22 coincide.SELECTED DRAWING: Figure 2 【課題】磁気式回転センサ及び自動調心機能の組み合わせに起因する検出精度の低下を抑制可能な回転センサ付き軸受装置を提供する。【解決手段】軸受本体１４は、外輪２２が、軸受中心Ｃを中心とする円弧状の軌道Ｔに沿って移動する自動調心機能を有する軸受からなる。回転センサ１６は、内輪２０及び外輪２２のうちの一方に固定されて磁気を発する磁気エンコーダ４４と、内輪２０及び外輪２２のうちの他方に固定されて磁気を検出する磁気センサ５２と、を備える。磁気エンコーダ４４及び磁気センサ５２は、内輪２０及び外輪２２の軸が一致する状態にて回転軸１２の径方向に沿って離間配置される。【選択図】図２