To provide a small-sized bearing device capable of accurately measuring a temperature rise or acceleration with rotations of a bearing.SOLUTION: A bearing device 1 comprises: an outer ring 2; an inner ring 3; a plurality of rolling elements 4; an outer annulus 7; a magnetic ring 8; a cylindrical heat insulation part 11 of which heat conductivity is low and which consists of a non-metal insulator and includes a partition wall 11a extending in a radial direction; and a stator 9 fixed at an opposite side of a bearing B with the partition wall 11a interposed therebetween. The magnetic ring 8 is disposed so as to face the stator 9, and the stator 9 and the magnetic ring 8 constitute a generator G. The bearing device 1 further comprises a circuit board 10 which is fixed in a space closer to the bearing B side than the partition wall 11a. The circuit board 10 includes a power supply circuit 16 which creates a DC power source by performing rectification processing on power generated by the generator G, at least one sensor 17 for detecting a state of the bearing B, and a wireless communication circuit 20 for transmitting output of the at least one sensor 17 to an outside wirelessly.SELECTED DRAWING: Figure 1
【課題】軸受の回転に伴う温度上昇、あるいは加速度を正確に測定することが可能な小型の軸受装置を提供する。【解決手段】軸受装置1は、外輪2と、内輪3と、複数の転動体4と、外環7と、磁気リング8と、熱伝導率が低く非金属の絶縁体から構成され、径方向に延びる隔壁11aを有する円筒状の断熱部11と、隔壁11aを挟んで軸受Bと反対側に固定されるステータ9と、を備える。磁気リング8は、ステータ9に対向するように配置され、ステータ9と磁気リング8とは発電機Gを構成する。軸受装置1は、隔壁11aよりも軸受B側の空間に固定された回路基板10をさらに備える。回路基板10は、発電機Gで生成される電力を整流処理して直流電源を作る電源回路16と、軸受Bの状態を検出する少なくとも1つのセンサ17と、少なくとも1つのセンサ17の出力を無線で外部に送信するワイヤレス通信回路20と、を含む。【選択図】図1
BEARING DEVICE, SPINDLE DEVICE, AND ELECTRIC VERTICAL TAKE-OFF/LANDING MACHINE
軸受装置、スピンドル装置、および電動垂直離着陸機
2022-10-14
Patent
Elektronische Ressource
Japanisch
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