Centrifugal planetary friction transmission
AssigneeYunzao Li
InventorYue Zheng
Life of this patent
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Abstract
A centrifugal planetary friction transmission comprising an input shaft, an output shaft, at least one planetary friction pulley set which is formed by three coaxially linked cylindrical external friction pulleys, and three internal pulleys. The friction forces acting on the planetary friction pulley set are mostly cancelled out by each other. According to the invention, the external friction pulleys only contact with the internal friction pulleys, and the normal pressure for producing the friction force for transmitting the torque is created by the centrifugal force of the external friction pulley set only and the transmission is a positive characteristic planetary transmission.
Claims12
A centrifugal planetary friction transmission comprising an input shaft, an output member, at least one planetary friction roller set comprising two external friction rollers of the planetary friction roller set having same size, and contacting respectively with two immobile internal friction rollers which have symmetric structure and same size with respect to each other, and an external friction roller in between said external friction rollers contacting with a rotary internal friction roller to enable friction forces acting on said planetary friction roller set to be substantially cancelled out reduce loading on a planetary bearing means, the output member being attached to the rotary internal friction roller, wherein said transmission further comprises at least one rotating arm supporting said external friction rollers via the planetary bearing means, and said at least one arm is attached to the input shaft so that said external friction rollers receive only the power transmitted from the rotating arm, and said external friction rollers only contact with said internal friction rollers, and a normal pressure for producing the friction force for transmitting the torque is created by the centrifugal force of said external friction rollers, and
- wherein each of said external friction rollers rotate about its axis and orbit about an axis of the internal friction rollers.
A centrifugal planetary friction transmission comprising an input shaft, an output member, at least one planetary friction roller set comprising two external friction rollers of the planetary friction roller set having same size, and contacting respectively with two rotary internal friction rollers which have symmetric structure and same size with respect to each other, an external friction roller in between said two external friction rollers contacting with an immobile internal friction roller to enable friction forces acting on said planetary friction roller set to be substantially cancelled out to reduce loading on a planetary bearing means, the output shaft being attached to the rotary internal friction rollers, wherein said transmission further comprises at least one rotating arm, said external friction rollers being supported on the at least one arm via the bearing means, and said at least one arm being attached to the input shaft so that said external friction rollers receive only the power transmitted from the at least one rotating arm, and said external friction rollers only contact with said internal friction rollers, and a normal pressure for producing the friction force for transmitting the torque is created by the centrifugal force of said external friction rollers,
- wherein each of said external friction rollers rotate about its axis and orbit about an axis of the internal friction rollers, and the external friction rollers contact with the internal friction rollers, respectively.
A centrifugal planetary friction transmission comprising:
- an input shaft;
- an output member;
- and
- at least one planetary friction roller set which is formed by three coaxially linked cylindrical external friction rollers and three internal rollers, each said external friction roller rotating about its axis and orbiting about an axis of the internal friction roller, and the external friction rollers contacting with internal friction rollers respectively;
- wherein two external friction rollers at both ends of the planetary friction roller set have the same size, and contacting respectively with two immobile internal friction rollers which have symmetric structure and same size with respect to each other, and an external friction roller in between said external friction rollers contacting with said rotary internal friction roller for reduced loading on a planetary bearing means, the output member being attached to the rotatable internal friction rollers, wherein said transmission further comprises at least one rotating arm, each said external friction roller being supported on the arm via the bearing means, and said arm is attached to the input shaft so that said external friction rollers receive the power transmitted from the rotating arm.
Dependencies are inferred from the claim text.