JP2017187062A5

JP2017187062A5 -

Info

Publication number: JP2017187062A5
Application number: JP2016074110A
Authority: JP
Filing date: 2016-04-01
Publication date: 2017-11-24
Anticipated expiration: 2036-04-01

Description

この発明の第二態様であるワイヤレスセンサ付き軸受は、下記の構成(11)〜(17)を有する。
(11)外周面に内輪軌道面を有する内輪と、前記内輪軌道面と対向配置される外輪軌道面を内周面に有する外輪と、前記内輪軌道面と前記外輪軌道面とで形成される軌道に配置された転動体と、を有する。
(12)環状体からなる保持器であって、前記転動体を回転自在に保持するポケットを有し、前記ポケットは前記環状体の周面を貫通し、前記ポケットは前記環状体の周方向に複数個形成された保持器を有する。隣り合う前記ポケット間の部分に、軸方向に伸びる貫通穴が形成されている。
(13)複数の磁石であって、前記保持器の前記貫通穴に、前記環状体の周方向で各磁石のＮ極とＳ極が隣り合うように固定された磁石を有する。
(14)前記内輪と前記外輪との間を軸方向一端部で密封する第一シールであって、前記保持器に対して相対回転する第一シールと、前記第一シールの前記磁石との対向面に固定されたコイルと、前記内輪と前記外輪との間を軸方向他端部で密封する第二シールと、を有する。
(15)前記内輪、前記外輪、および前記第一シールのいずれかに設置されたセンサを有する。
(16)前記第一シールに形成された回路部であって、前記磁石と前記コイルとの相対回転による電磁誘導で前記コイルに生じた電流を電源供給部へ供給する電源回路と、前記センサで検出された検出情報から検出値を演算する演算回路と、演算結果を示す無線信号を作成する無線回路と、を備えた回路部を有する。
(17)前記回路部を前記磁石から磁気的に遮蔽する磁気シールドと、前記無線信号を送信するアンテナであって、前記第一シールに固定されたアンテナと、を有する。 The bearing with a wireless sensor according to the second aspect of the present invention has the following configurations (11) to (17).
(11) A track formed by an inner ring having an inner ring raceway surface on an outer peripheral surface, an outer ring having an outer ring raceway surface disposed opposite to the inner ring raceway surface on an inner peripheral surface, and the inner ring raceway surface and the outer ring raceway surface. And a rolling element disposed in the.
(12) A cage made of an annular body, having a pocket for rotatably holding the rolling element, the pocket penetrating the circumferential surface of the annular body, and the pocket in the circumferential direction of the annular body A plurality of cages are formed. A through hole extending in the axial direction is formed in a portion between the adjacent pockets.
(13) A plurality of magnets, each having a magnet fixed in the through hole of the cage so that the N pole and S pole of each magnet are adjacent to each other in the circumferential direction of the annular body.
(14) A first seal that seals between the inner ring and the outer ring at one end in the axial direction, the first seal rotating relative to the cage, and the first seal facing the magnet A coil fixed to the surface, and a second seal that seals between the inner ring and the outer ring at the other end in the axial direction.
(15) It has a sensor installed on any of the inner ring, the outer ring, and the first seal.
(16) A circuit unit formed on the first seal, the power supply circuit supplying current generated in the coil by electromagnetic induction due to relative rotation of the magnet and the coil to a power supply unit, and the sensor The circuit unit includes an arithmetic circuit that calculates a detection value from detected detection information, and a wireless circuit that generates a wireless signal indicating a calculation result.
(17) A magnetic shield that magnetically shields the circuit unit from the magnet, and an antenna that transmits the radio signal and is fixed to the first seal.

Claims

An inner ring having an inner ring raceway surface on the outer peripheral surface;
An outer ring having, on the inner peripheral surface, an outer ring raceway surface disposed opposite to the inner ring raceway surface;
A rolling element disposed on a track formed by the inner ring raceway surface and the outer ring raceway surface;
A cage made of an annular body, having a pocket for rotatably holding the rolling element, wherein the pocket penetrates the circumferential surface of the annular body, and a plurality of pockets are formed in the circumferential direction of the annular body A cage in which a through hole extending in the axial direction is formed in a portion between the adjacent pockets ;
A plurality of magnets, wherein the magnets are fixed to the through-holes of the cage so that the N and S poles of each magnet are adjacent to each other in the circumferential direction of the annular body;
A first seal that seals between the inner ring and the outer ring at one axial end, and a first seal that rotates relative to the cage;
A coil fixed to a surface of the first seal facing the magnet;
A second seal that seals between the inner ring and the outer ring at the other axial end;
A sensor installed on any of the inner ring, the outer ring, and the first seal;
A circuit unit formed on the first seal, the power source circuit supplying current generated in the coil to the power supply unit by electromagnetic induction caused by relative rotation between the magnet and the coil, and detected by the sensor A circuit unit having an arithmetic circuit for calculating a detection value from detection information, and a radio circuit for creating a radio signal indicating a calculation result;
A magnetic shield for magnetically shielding the circuit portion from the magnet;
A wireless sensor-equipped bearing having an antenna for transmitting the radio signal, the antenna being fixed to the first seal.

Said retainer, said annular body wireless sensor with bearing of claim 1, wherein one axial end surface is crown type cage which is open in the pocket.