According to the present invention, a composite curve is obtained by an envelope of a moving locus of the teeth of the flexible external gear obtained when the deflection of the opening of the flexible external gear is set to be a state of negative deviation which is lower in value than a normal deflection, and a moving locus at a section of rotation at an end portion of tooth trace on the side of a diaphragm or in the vicinity of the outside of the end portion, and the thus obtained composite curve is employed for defining the tooth profiles of the both gears. Hence, it is possible to use a limited part of the envelope for the basis of the formation of the tooth profiles of teeth, the limited part of the envelope corresponding to the values of negative deviation of the respective sections of rotation of tooth trace of the flexible external gear. Furthermore, the pressure angle at the datum point can be decided in connection with the value of the negative deviation of the opening of the flexible external gear.
According to the present invention, a composite curve is obtained by an envelope of a moving locus of the teeth of the flexible external gear obtained when the deflection of the opening of the flexible external gear is set to be a state of negative deviation which is lower in value than a normal deflection, and a moving locus at a section of rotation at an end portion of tooth trace on the side of a diaphragm or in the vicinity of the outside of the end portion, and the thus obtained composite curve is employed for defining the tooth profiles of the both gears. Hence, it is possible to use a limited part of the envelope for the basis of the formation of the tooth profiles of teeth, the limited part of the envelope corresponding to the values of negative deviation of the respective sections of rotation of tooth trace of the flexible external gear. Furthermore, the pressure angle at the datum point can be decided in connection with the value of the negative deviation of the opening of the flexible external gear.
正在翻译中..