Land vehicles – Wheeled – Occupant propelled type
Reexamination Certificate
2002-03-12
2004-02-24
Hurley, Kevin (Department: 3611)
Land vehicles
Wheeled
Occupant propelled type
C074S417000
Reexamination Certificate
active
06695333
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a bicycle, in particular, to a chainless transmission mechanism for a bicycle.
BACKGROUND OF THE INVENTION
A chainless bicycle comprises a drive mechanism mainly composed of bevel gears and transmission shafts to replace a chain in a conventional bicycle. The chainless bicycle has advantages of a stable transmission and a long life of use. However, the chainless bicycle in the prior art comprises a one-direction ratchet clutch. A spline hole of the bevel gear is matched with a spline shaft to complete the transmission. The chainless bicycle with such a structure is of a complicated manufacturing process and a high cost.
Therefore, it is needed to provide a chainless transmission mechanism for a bicycle to solve the problems in the prior art.
SUMMARY OF THE INVENTION
An object of the invention is to provide a chainless transmission mechanism for a bicycle to overcome the drawbacks in the art.
According to the invention, the chainless transmission mechanism comprises:
a first shaft connected to a pedal of the bicycle;
a first bevel gear connected to the first shaft;
a second shaft perpendicular to the first shaft, two ends of which are connected to a second bevel gear and a third bevel gear, respectively, wherein the second bevel gear is matched with the first bevel gear to drive the second shaft;
a fourth bevel gear mounted on an axle of a rear-wheel hub of the bicycle to engage with the third bevel gear;
a ratchet clutch connected between the rear-wheel hub and the axle; and
a connection member connected between the fourth bevel gear and the rear-wheel hub.
REFERENCES:
patent: 5299819 (1994-04-01), Leu
patent: 5482306 (1996-01-01), Hsu
patent: 5852948 (1998-12-01), Chang
patent: 5967537 (1999-10-01), Chang
patent: 6478323 (2002-11-01), Chang
Huang Yongqiang
Ou Yaocai
Ruan Weihua
Wu Shaofang
Xiao Ronghua
Earley John F. A.
Earley III John F. A.
Guangzhou Motors Group Company
Harding Earley Follmer & Frailey
Hurley Kevin
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