PROBLEM TO BE SOLVED: To realize a structure of a rolling bearing unit with an encoder, capable of ensuring sufficient sealability between a seal material disposed on an outer peripheral face of a cap and an inner peripheral face of an outer ring.SOLUTION: A fitting cylindrical portion 21a constituting a cap 20a is composed of a main body cylindrical portion 24a internally fitted and fixed to a first fitting face 23 formed on an inner peripheral face of an axial inner end part of an outer ring 2 by interference fitting, and a non-contact cylindrical portion 25a disposed at an axial inner side with respect to the main body cylindrical portion 24a, and not kept in contact with the inner peripheral face of the outer ring 2. Further a seal material 26a is fixed to an outer peripheral face of the non-contact cylindrical portion 25a, and the seal material 26a is composed of a lip main body 27a having a substantially trapezoidal cross-sectional shape, and kept in contact with a seal face 50 having an inner diameter dimension larger than the first fitting face 23a of the inner peripheral face of the outer ring 2 at its tip edge, and an auxiliary lip 49 formed on a radial outer part in an extended state, and kept in contact with a chamfer portion 52 formed on an axial inner side of the seal face 50 at its axial side face in a used state.SELECTED DRAWING: Figure 3

    【課題】キャップの外周面に設けたシール材と外輪の内周面との密封性を十分に確保できる、エンコーダ付転がり軸受ユニットの構造を実現する。【解決手段】キャップ20aを構成する嵌合筒部21aを、外輪2の軸方向内端寄り部分の内周面に形成された第一嵌合面23aに締り嵌めにより内嵌固定する本体筒部24aと、本体筒部24aよりも軸方向内側に設けられ、外輪2の内周面に接触しない非接触筒部25aとから構成する。又、この非接触筒部25aの外周面にシール材26aを固定し、このシール材26aを、外輪2の内周面のうち第一嵌合面23aよりも内径寸法の大きいシール面50にその先端縁を接触させる断面略台形状のリップ本体27aと、径方向外方に延出する状態で形成され、使用状態で、シール面50の軸方向内側に形成された面取り部52にその軸方向側面を接触させる補助リップ49とから構成する。【選択図】図3


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    Title :

    ROLLING BEARING UNIT WITH ENCODER


    Additional title:

    エンコーダ付転がり軸受ユニット


    Contributors:

    Publication date :

    2016-04-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16C SHAFTS , Wellen / B60B VEHICLE WHEELS , Räder für Fahrzeuge



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