| 摘要 |
A gearbox comprises an input shaft and an output shaft, the input shaft and the output shaft are linked by a plurality of gearing members. Each gearing member bears a male gear wheel having n outwardly projecting engaging means on the outer circumference and/or a female ring gear having n+1 or n+2 inwardly projecting engaging means on the inner circumference, and at least one gearing member bearing both a male gear wheel and a female ring gear on opposite sides. The gearing members are placed in series such that each male gear wheel engages with a female ring gear, at least one of the outwardly projecting engaging means of the male gear wheel interlocking with at least one of the inwardly projecting engaging means of the female ring gear. The gearing members are constrained in a housing such that a male gear wheel rotates about a first axis while the female ring gear that engages with the male gear wheel rotates about a second axis, the first and second axes being parallel but offset, and the first axis falling within the circumference of the female ring gear. The rotation of male gear wheel transferring motion to the female ring gear through the interlocking of the inwardly projecting engaging means of the male gear to the outwardly projecting engaging means of the female ring gear causes the female ring gear to rotate, (or vice versa). Each gearing member is constrained at its axis by a semilunar bearings placed between the gearing member and the inner surface of the housing. Ideally, n=2. The axes of rotation of each alternating gearbox elements alternates, and there are provided an odd number of gearing elements such that the axes or rotation of the input shaft and the output shaft are coincident. |
