向心滚针和保持架组件RadialNeedleRollerandCageAssemblies.PDF

向心滚针和保持架组件 Radial Needle Roller and Cage Assemblies ⊙滚针和保持架组件为一独立的轴承元件，其中每个滚针由保持架精确地引导和保持。它实现了最小的结构空间下具有高负荷 能力和高刚性的轴承设计。保持架的两引导面间距宽广，保证了滚针和保持架组件的精确引导。 ⊙滚针和保持架组件适用于轴和座孔可作为滚道之处。在具有高尺寸精度、几何精度的轴和座孔滚道下，可得到最高旋转精 度。 ⊙轴部位的工作间隙取决于内外滚道的公差、滚针组差和工作温度。 ⊙The needle roller and cage assembly is an independent bearing element. The each of needle roller is guided and caged accurately by the cage. It has the highest load carrying capacity and the high rigid design in the smallest structure and space. The wide distance between two guiding surfaces of cage ensures the accurate guide of needle roller and cage assembly. ⊙Needle roller and cage assembly is suitable for the place where the shaft and housing bore are acted as the raceway. Under the geographic accuracy shaft and housing bore raceway, the highest rotation precision can be obtained. ⊙The working clearance in bearing location is dependent on the tolerance of inner and outer raceways, needle roller difference and working temperature. 39 向心滚针和保持架组件 Radial Needle Roller and Cage Assemblies ⊙向心滚针和保持架组件K、K┅D型，该种轴承只有一组向心滚针和保持架组件，外径尺寸小，适用于径向尺寸特别受限制的 部件中，用来承受径向负荷。K┅ZW、K┅ZWD型为双列向心滚针和保持架组件。 ⊙该种轴承由于无套圈，与其相配的轴颈表面和外壳孔表面直接作为滚动面要求其表面硬度HRC60、表面粗糙度Ra值不大于 0.63μm ⊙为满足主机要求，该种轴承可加工成剖分式，便于装拆。K┅D表示剖分式、单列，K┅ZWD表示剖分式、双列。 ⊙K单列向心滚针和保持架组件 K┅ZW双列向心滚针和保持架组件 ⊙K┅D剖分式单列向心滚针和保持架组件 K┅ZWD剖分式双列向心滚针和保持架组件 ⊙As for Model K, K D radial needle and retainer assembly, this kind of bearing only has a group of radial needle and retainer assembly. With small outside diameter size, it is suitable for the parts, where the radial sizes are specially limited, used for bearing the radial load. Model K ZW, K ZWD radial needle and retainer assembly is the double row radial needle and retainer assembly. ⊙As for this kind of bearing, since it has not collar, the surface of journal and the surface of hole at the housing are directly acted as rolling surface with surface hardness