摘要:
In the toroidal-type continuously variable transmission, the radial needle roller bearing includes a plurality of needle rollers, the two end portions of each of the needle rollers in the axial direction thereof are crowned, and the crowning amount is set such that, in the portion of the needle roller that is situated by 7-13% of the axial-direction length toward the axial-direction central portion of the needle roller from the axial-direction end face of the needle roller, the crowning amount is 0.1-0.4% of the outside diameter of the axial-direction central portion of the needle roller. Further, in the inner peripheral surface of the output-side disk, there are formed a fitting portion to be fitted outside with a member rotatable in conjunction with the output-side disk and an outer race raceway portion for the needle roller bearing, in the portion of the inner peripheral surface of the output-side disk that is situated near to the inside surface thereof, there is formed a residual compressive stress layer by shot peening, and the outer race raceway portion is ground so as to remove a portion of the residual compressive stress layer, to thereby form the outer race raceway portion as a smooth surface.
摘要:
In a toroidal-type continuously variable transmission, there is provided a thrust rolling bearing interposed between a power roller and a trunnion for supporting a thrust-direction load applied to the power roller. The thrust rolling bearing includes a plurality of rolling elements and a retainer rollably holding the plurality of rolling elements. The retainer defines a circular-ring-shaped main body and a plurality of pockets respectively formed in the main body for rollably holding the plurality of rolling elements. A clearance between the pocket and the rolling element is set in the range of 0.6 to 6.0% of the ball diameter of the rolling element.
摘要:
A power roller bearing for rotatably supporting a power roller of a toroidal-type continuously variable transmission, having: an inner ring; an outer ring; a plurality of balls respectively interposed between the inner and outer rings; and, a retainer for holding the balls therein, wherein the retainer includes a plurality of pockets for storing the balls therein at equi-distant positions in the peripheral direction of the retainer, and the inner peripheral portions of the pockets are respectively formed of elastic material that, when the power roller rotates, allows the balls to shift from the equi-distant positions.
摘要:
A power roller bearing for rotatably supporting a power roller of a toroidal-type continuously variable transmission, having: an inner ring; an outer ring; a plurality of balls respectively interposed between the inner and outer rings; and, a retainer for holding the balls therein, wherein the retainer includes a plurality of pockets for storing the balls therein at equi-distant positions in the peripheral direction of the retainer, and the inner peripheral portions of the pockets are respectively formed of elastic material that, when the power roller rotates, allows the balls to shift from the equi-distant positions.
摘要:
A structure is realized that can easily identify misassembly of a middle seal lip 18d in a structure that obtains a good seal. A middle seal lip 18d located between an outside seal lip 17d and an inside seal lip 19d inclines outwards in an axial direction towards its internal edge, being its tip. This tip makes a sliding contact all around the circumference of a cylindrical surface 21 located on an axial intermediate portion of the hub 2. The sum of a thickness T18 in a free state of the middle seal lip 18d, and a thickness ΔT of a portion of a seal member 16d, is greater than a width dimension “(R15−D2)/2” in a radial direction of a ring shaped gap 23 located between an internal edge of a metal core 15d and the cylindrical surface 21. In a misassembly state, the seal lip 18d is strongly clamped between the internal edge of the metal core 15d and the cylindrical surface 21, resulting in great friction between the middle seal lip 18d and the cylindrical surface 21, so that the misassembly state can be identified easily.
摘要翻译:实现了可以容易地识别获得良好密封的结构中的中间密封唇缘18d的错误组装的结构。 位于外部密封唇部17d和内部密封唇缘19d之间的中间密封唇缘18d作为其尖端朝向其内部边缘沿轴向方向向外倾斜。 该尖端在位于轮毂2的轴向中间部分的圆柱形表面21的周围形成滑动接触。中间密封唇缘18d的自由状态下的厚度T18和厚度Dgr; T 密封构件16d的一部分大于位于金属芯15d的内边缘和圆筒表面21之间的环形间隙23的径向方向上的宽度尺寸“(R15-D2)/ 2”。 错合装配状态,密封唇18d被牢固地夹紧在金属芯15d的内边缘和圆柱形表面21之间,导致中间密封唇18d和圆柱形表面21之间的大的摩擦,从而可以识别出错误的组装状态 容易。
摘要:
A structure is realized that can easily identify misassembly of a middle seal lip 18d in a structure that obtains a good seal. A middle seal lip 18d located between an outside seal lip 17d and an inside seal lip 19d inclines outwards in an axial direction towards its internal edge, being its tip. This tip makes a sliding contact all around the circumference of a cylindrical surface 21 located on an axial intermediate portion of the hub 2. The sum of a thickness T18 in a free state of the middle seal lip 18d, and a thickness ΔT of a portion of a seal member 16d, is greater than a width dimension “(R15−D2)/2” in a radial direction of a ring shaped gap 23 located between an internal edge of a metal core 15d and the cylindrical surface 21. In a misassembly state, the seal lip 18d is strongly clamped between the internal edge of the metal core 15d and the cylindrical surface 21, resulting in great friction between the middle seal lip 18d and the cylindrical surface 21, so that the misassembly state can be identified easily.
摘要:
A rocker arm comprises an arm body, a shaft and a roller. The arm body formed substantially in a U-shape in section by effecting drawing on a metal plate, includes a connection wall connecting a pair of side walls, an aperture formed through the connection wall, and through-holes at positions where the pair of side walls are aligned with each other. A peripheral edge of the aperture is so formed as to be finished by inserting a first finishing die into the aperture from between the pair of side walls. The shaft is fitted in the pair of through-holes and extended between the pair of side walls. The roller is rotatably supported on the shaft.
摘要:
The mutual difference of the diameters of the balls 17, 17 incorporated into a bearing unit for supporting a wheel is set to be not more than 1.5 μm (preferably to be not more than 1.0 μm). Finishing work is conducted on both sides of the disk 2 under the condition that the bearing unit for supporting a wheel is assembled and further this disk 2 is attached to the attaching flange 13 of the bearing unit for supporting a wheel. Due to the foregoing, the whirl of the hub 8 with respect to the outer ring 6 caused by the revolution of the balls 17, 17 can be suppressed, and at the same time an influence of the error of each portion can be eliminated. Therefore, the deflection of both sides 24, 24 of the disk 2 can be suppressed to be a sufficiently low value of not more than 35 μm (preferably not more than 25 μm).