PROBLEM TO BE SOLVED: To provide a structure capable of lessening a deformation amount of a pair of inner wheels accompanied by assembling and, at the same time, capable of making deformation amounts almost equal between the pair of wheels themselves.SOLUTION: An inner diameter Dof an outside concave part 15 and an inner diameter Dof an inside concave part 16 are made almost equal to each other. A bottom surface of the outside concave part 15 is provided between an axial direction inner end surface of an inner ring 4a of the axial direction outside and an axial direction inner edge of an inner ring raceway 13a with respect to axial direction and, at the same time, a bottom surface of the inside concave part 16 is provided between an axial direction outer end surface of the inner ring 4b of the axial direction inside and an axial direction outer edge of an inner ring raceway 13b with respect to axial direction. An axial direction distance Lfrom a virtual plane α containing an abutting part between the axial direction inner end surface of the inner ring 4a of the axial direction outside and the axial direction outer end surface of the inner ring 4b of the axial direction inside to the bottom surface of the outside concave part 15 and an axial direction distance Lfrom the virtual plane α to the bottom surface of the inside concave part 16 are made to be equal to each other.SELECTED DRAWING: Figure 1
【課題】組み立てに伴う1対の内輪の変形量を小さく抑えると共に、これら1対の内輪の変形量を、これら1対の内輪同士の間でほぼ同じにできる構造を実現する。【解決手段】外側凹部15の内径D15と、内側凹部16の内径D16とをほぼ等しくする。外側凹部15の底面を、軸方向に関して軸方向外側の内輪4aの軸方向内端面と内輪軌道13aの軸方向内端縁との間に設けると共に、内側凹部16の底面を、軸方向に関して軸方向内側の内輪4bの軸方向外端面と内輪軌道13bの軸方向外端縁との間に設ける。軸方向外側の内輪4aの軸方向内端面と軸方向内側の内輪4bの軸方向外端面との当接部を含む仮想平面αから外側凹部15の底面までの軸方向距離L15と、仮想平面αから内側凹部16の底面までの軸方向距離L16とを等しくする。【選択図】図1
WHEEL SUPPORTING DOUBLE ROW ROLLING BEARING UNIT
車輪支持用複列転がり軸受ユニット
2017-05-18
Patent
Elektronische Ressource
Japanisch