Abstract: In a roller type transmission device 1, an array 11 of transmission pin rollers is press fit circularly into an inner side surface 10a of a stationary ring 10, and an array 18 of controllable pin rollers is press fit circularly into an inner side surface 13c of a rotational ring 13. To pin rollers 11a, 18a, employed are high precision cylindrical rollers or needle rollers which are usually used for a roller bearing or the like. Such is the structure that the array 11 of transmission pin rollers and the array 18 of controllable pin rollers work as inner teeth to make a backlash phenomenon minimum, rendering a pitch distance precise between the pin rollers, maintaining a uniform tooth profile with a high precision, equalizing a surface roughness and improving a meshing precision between the pin rollers 11a, 18a and the teeth 7a, 8a.

Abstract: In a rolling ball type two-stage low speed changer device 1, empirical formulas are obtained as a relationship between number of first, second, third and fourth lobes z1, z2, z3, z4 of a hypo-based groove 6 (8) and an epi-based groove 7 (9). The relationship is represented by z1>z2, z3>z4, z1?z2=2, z3?z4=2 and z3=n×z2×½ (n: integer), and enables to a precise and smooth rotational transmission without inviting differential slippage and incurring an irregular rotation and uneven torque transmission on an output shaft 16 within the practical usage, and reducing a thickness dimension to render a whole structure compact, achieving a high transmission efficiency without inviting a backlash, and attaining a high torque transmission with low noise.

Abstract: In a roller type transmission device 1, an array 11 of transmission pin rollers is press fit circularly into an inner side surface 10a of a stationary ring 10, and an array 18 of controllable pin rollers is press fit circularly into an inner side surface 13c of a rotational ring 13. To pin rollers 11a, 18a, employed are high precision cylindrical rollers or needle rollers which are usually used for a roller bearing or the like. Such is the structure that the array 11 of transmission pin rollers and the array 18 of controllable pin rollers work as inner teeth to make a backlash phenomenon minimum, rendering a pitch distance precise between the pin rollers, maintaining a uniform tooth profile with a high precision, equalizing a surface roughness and improving a meshing precision between the pin rollers 11a, 18a and the teeth 7a, 8a.

Abstract: In a roller type transmission device 1, an array 11 of transmission pin rollers is press fit circularly into an inner side surface 10a of a stationary ring 10, and an array 18 of controllable pin rollers is press fit circularly into an inner side surface 13c of a rotational ring 13. To pin rollers 11a, 18a, employed are high precision cylindrical rollers or needle rollers which are usually used for a roller bearing or the like. Such is the structure that the array 11 of transmission pin rollers and the array 18 of controllable pin rollers work as inner teeth to make a backlash phenomenon minimum, rendering a pitch distance precise between the pin rollers, maintaining a uniform tooth profile with a high precision, equalizing a surface roughness and improving a meshing precision between the pin rollers 11a, 18a and the teeth 7a, 8a.

Abstract: In a rolling ball type two-stage low speed changer device 1, empirical formulas are obtained as a relationship between number of first, second, third and fourth lobes z1, z2, z3, z4 of a hypo based groove 6 (8) and an epi-based groove 7 (9). The relationship is represented by z1>z2, z3>z4, z1?z2=2, z3?z4=2 and z3=n×z2×½ (n: integer), and enables to a precise and smooth rotational transmission without inviting differential slippage and incurring an irregular rotation and uneven torque transmission on an output shaft 16 within the practical usage, and reducing a thickness dimension to render a whole structure compact, achieving a high transmission efficiency without inviting a backlash, and attaining a high torque transmission with low noise.