CROSS ROLLER BEARING

To provide a cross roller bearing that provides accurate and reproducible lid positioning without being affected by a clearance due to tolerance, by providing unevenness on a contact portion of a built-in hole of an inner ring or outer ring and a lid and fitting them.SOLUTION: A built-in hole 5 is formed into an uneven shape by a flat contact surface 18 formed by a notch part 17 extending from an inner peripheral surface 8 of an end surface 14 of an inner ring 2 to an outer peripheral surface 9, and a flat notch step part 20 formed by a notch part 19 reaching a relief groove 16 from the middle of the notch part 17. A lid 3 comprises a convex step part 21 that is fitted into the built-in hole 5, extends from the middle of a lower surface 22 to the relief groove 16 and projects, and is locked to the notch step part 20.SELECTED DRAWING: Figure 3 【課題】このクロスローラ軸受は，内輪又は外輪の組込み孔と蓋との接触部分に凹凸を設けて嵌合することで，公差による隙間に影響されず，正確な再現性のある蓋の位置決めを行う。【解決手段】組込み孔５は，内輪２の端面１４の内周面８から外周面９に延びる切欠き部１７で形成される平らな接触面１８と，切欠き部１７の途中から逃げ溝１６に達する切欠き部１９で形成される平らな切欠き段部２０とによって凹凸に形成されている。蓋３は，組込み孔５に嵌合すると共に，下面２２の途中から逃げ溝１６までに延びて突出し，切欠き段部２０に係止する凸状段部２１を備えている。【選択図】図３