Ratchet cylinder for a bicycle hub
a ratchet cylinder and hub technology, applied in the direction of mechanical actuated clutches, clutches, freewheel clutches, etc., can solve the problems of affecting the effect of the c-ring for retaining the ratchet teeth, misalignment of the ratchet teeth, and difficulty in producing circular elastic clasps
Active Publication Date: 2013-05-23
HSIEH TE YAO
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AI Technical Summary
Benefits of technology
The design ensures reliable engagement of ratchet teeth with the hub shell, enhances structural stability, reduces production costs, and minimizes elastic fatigue, improving the efficiency and durability of the bicycle hub's rotational mechanism.
Problems solved by technology
However, when there are six ratchet teeth on the ratchet cylinder, the effect of the C-ring for retaining the ratchet teeth will be adversely affected due to the ratchet teeth are disposed at a relatively short distance from one another, causing misalignment of the ratchet teeth.
Hence, the C-ring is replaced with a circular elastic clasp, the elasticity of the elastic clasp can overcome the bad retaining effect of the rigid C-ring, however, the circular elastic clasp is difficult to produce.
Moreover, the elastic clasp has elastic fatigue problem.
Method used
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Embodiment Construction
[0016]Referring to FIGS. 1-4, a ratchet cylinder for a bicycle hub in accordance with the present invention is used in cooperation with a hub shell 10 and an axle 20.
[0017]The hub shell 10 includes a first end 11 and a second end 12, and the second end 12 is provided around its inner surface with a plurality of teeth 121.
[0018]The axle 20 is inserted in the hub shell 10 in such a manner that one end of the axle 20 extends out of the first end 11 of the hub shell 10 and screwed with a nut 21 and the other end of the axle 20 extends out of the second end 12 of the hub shell 10.
[0019]The ratchet cylinder 30 includes a cylinder member 31, a plurality of ratchet teeth 32, a plurality of springs 33 and a C-ring 34.
[0020]The cylinder member 31 is formed with a central hole 311. At one end of the cylinder member 31 is formed a connecting end 312, around the connecting end 312 is formed a plurality of arc-shaped receiving grooves 313 which are spaced apart and equiangularly arranged for rece...
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A ratchet cylinder for a bicycle hub is provided with a cylinder member, a plurality of ratchet teeth, a plurality of springs and a C-ring. The C-ring circles around the connecting end of the cylinder member and engages in the grooves of the respective ratchet teeth, so as to retain the ratchet teeth in the receiving grooves and allow the ratchet teeth to pivot within a limited angle. The springs are disposed between the ratchet teeth and the ratchet cylinder to keep pushing the respective ratchet teeth of the hub shell into an engagement position with the teeth of the hub shell, so that the ratchet teeth can be surely engaged with the teeth.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a bicycle hub, and more particularly to a ratchet cylinder for a bicycle hub.[0003]2. Description of the Prior Art[0004]A conventional bicycle hub normally consists of hub shell formed with teeth, a ratchet cylinder, an axle and a plurality of bearings. The axle is inserted in the hub shell, the ratchet cylinder is formed around its periphery with a plurality of ratchet teeth for engaging with the teeth of the hub shell in a unidirectional manner, and the bearings are disposed between the axle and the respective components.[0005]The ratchet teeth of the ratchet cylinder are retained by a relatively rigid C-ring. When in rotation, the hub shell drives the ratchet cylinder through the engagement of the teeth and the ratchet teeth, and when in a reverse rotation, the teeth press down the ratchet teeth to make the ratchet cylinder idle. If the ratchet cylinder is only provided with three rat...
Claims
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IPC IPC(8): F16D41/30
CPCF16D41/30
InventorHSIEH, TE-YAO
OwnerHSIEH TE YAO