| 摘要 |
Drive mechanism for the conversion of oscillatory motion into rotating motion or vice versa by means of a non-circular gear train, in a system composed of arcuate pistons solidly fixed to a rotor which is able to oscillate about its axis inside a stator. The mechanism comprises a set of non-circular internal and external toothed gears coupled in a fashion similar to that of two epicyclic gearings joined by their respective planet gears, although there are not any sun gears in the present arrangement. All the gears cooperate so as to produce the sought motion conversion between the pistons and the planet carriers and the drive shaft attached thereon. Its field of application includes therefore any device that uses variable volume chambers as a means to transmit energy to, or obtain energy from, a working gas, such as compressors, pneumatic motors or internal combustion engines. |
| 主权项 |
1. Positive displacement machine for transmitting energy to, or obtaining energy from, a working gas, said machine comprising:
at least two pistons (22) spaced around a rotor (21) and rigidly attached thereto, each piston (22) being of the double-acting type and extending along an arc of circumference centered on an axis, called axis z (1) hereafter, said rotor (21) being mounted into a stator in such a way that it is able to oscillate about said axis z (1), and an assembly forming said stator, which delimitates the cylinder walls either by itself or together with the rotor (21), each cylinder (35) having intake (40A) and discharge (40B) means; said machine being characterized by a drive mechanism which transforms the rotating motion of a drive shaft (14) into the oscillatory motion of the rotor (21) or vice versa, said mechanism comprising: a ring gear (5R) having a non-circular pitch curve with rotational symmetry of order m with respect to axis z (1), m being an integer greater than two, and being fixed to the rotor (21) and centered on axis z (1); a ring gear (5S) having a non-circular pitch curve with rotational symmetry of order m with respect to axis z (1) and being fixed to the stator and centered on axis z (1); a first set of n like planet gears which are conjugate to the ring gear (5R) fixed to the rotor, n being equal to m or a submultiple of m greater than one, with each planet gear (10R) of said first set being in mesh with said ring gear fixed to the rotor (5R) in such a way that said set has rotational symmetry of order n with respect to axis z (1); a second set of n like planet gears which are conjugate to the ring gear (5S) fixed to the stator, with each planet gear (10S) of said second set being in mesh with said ring gear (5S) fixed to the stator in such a way that: said second set has rotational symmetry of order n with respect to axis z (1); each planet gear (10S) of said second set has an axis w (2) in common with a planet gear (10R) of the first set; and any two coaxial planet gears (10R,10S) rotate conjointly and are angularly offset by the largest angle possible between any two maximum radii of respective said two planet gears; at least one planet carrier (12) whereto each pair of said coaxial planet gears (10R, 10S) is connected in such a way that said pair is rotatable about its axis w (2), which axis w (2) is in turn fixed relative to said planet carrier (12); a drive shaft (14) attached coaxially to said planet carrier (12) for rotation therewith. |
