CN2583450Y

CN2583450Y - Improved gear disk for bicycle

Info

Publication number: CN2583450Y
Application number: CN 02281869
Authority: CN
Inventors: 江承勋
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-24
Filing date: 2002-10-24
Publication date: 2003-10-29
Anticipated expiration: 2012-10-24

Abstract

The utility model relates to an improved gear disk for a bicycle, which comprises gear disk body which is composed of a toothed ring made of aluminum alloy, and an inner ring made of carbon fiber composite materials, wherein the outer margin of the toothed ring is provided with a fastening part in a tooth shape and the fastening part is clamped with a chain. The inner ring is positioned on the inner edge of the toothed ring, and the inner margin of the toothed ring is fixedly connected with the outer margin of the inner ring by a fixed structure. The utility model can reduce the total weight of the existing bicycle, so the bicycle has the advantages of light weight, high riding speed and wear resistance.

Description

Improved bicycle gears dish

Technical field

The utility model relates to a kind of bicycle part, relates in particular to a kind of overall weight that lowers existing bicycle, make its structure have in light weight, ride fast and have the improved bicycle gears dish of wear-resisting effect concurrently.

Background technique

Bicycle develops so far, and its structural material all is towards in light weight, wear-resisting direction research and development, and is to make its structure reach best using effect, has developed composite material now.

Composite material has high specific strength, high specific rigidity and good fatigue-resistance characteristics, has been used on various carrier and the sports equipment.Especially bicycle for the comfortable feel of pursuing faster speed and driving, designs full car gross weight less than the standard of 10 kiloponds as senior car, in recent years in order to promote product quality, also with the material of carbon fiber as indispensability.

Existing bicycle gears dish structure, see also annex one, be that the shown in Figure 2 of No. 474312 patent " bicycle large fluted disc group structure reaches in order to form the mould device of this structure " announced in Taiwan, in order to make fluted disc reach wear-resisting effect (because of it needs to rub for a long time with toothed chain), all use metal to make, yet there is following shortcoming in the employed material of the existing bicycle gears dish of this kind structure:

Consider the wear resistance of tooth portion, gear disk is to adopt metal to make, and makes unit weight heavier, cause the weight of finished product also can increase relatively, like this, not only do not meet in light weight, the fireballing purpose of bicycle circle pursuit now, and increase the difficulty (for example: influence speed) of rider when driving.

This creator is based on the many years of experience of being engaged in the bicycle research and development, making, and through the permanent research and experiment of making great efforts, development and Design goes out the improved bicycle gears dish of the utility model finally, with Jiahui all Consumer and industry.

The model utility content

In order to overcome existing bicycle gears dish Heavy Weight, do not meet that bicycle is in light weight, wear-resisting now, fireballing requirement, the utility model provides a kind of improved bicycle gears dish, it can lower the overall weight of existing bicycle, make its structure have in light weight, ride fast and have wear-resisting effect concurrently, and on market, have more competitiveness.

The technological scheme that its technical problem that solves the utility model adopts is:

A kind of improved bicycle gears dish, comprise the gear disk body, it is characterized in that, this gear disk body is made up of ring in aluminum alloy ring gear and the carbon fiber composite, this ring gear outer rim is the ratchet clamping part that is dentation, for the chain engaging, ring is positioned at described ring gear inner edge in this, and ring gear inner edge and interior ring outer rim connect admittedly by a fixed structure.

Aforesaid improved bicycle gears dish, wherein ring gear and interior interannular are reserved with a spacing.

Aforesaid improved bicycle gears dish, wherein fixed structure is good with riveted construction.

The beneficial effects of the utility model are, the overall weight that it can lower existing bicycle, make its structure have in light weight, ride fast and have wear-resisting effect concurrently, and on market, have more competitiveness.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a stereoscopic schematic representation of the present utility model;

Fig. 2 is a decomposition texture schematic representation of the present utility model;

Fig. 3 is a local enlarged diagram of the present utility model;

Fig. 4 is the enlarged diagram at position shown in Figure 3.

Ring 40-----fixed structure 50-----ratchet clamping part 60-----spacing portion in the number in the figure explanation 10-----gear disk body 20-----ring gear 30-----

Embodiment

See also Figure 1 and Figure 2, the improved bicycle gears dish of the utility model comprises a gear disk body (10), and this gear disk body (10) is made up of ring gear (20) and interior ring (30);

Wherein ring gear (20) outer rim is the ratchet clamping part (50) that is dentation, and for the engaging of chain (not shown), and this ring gear (20) is aluminum alloy material, and has wear-resisting effect; The ring (30) that is positioned at ring gear (20) inner edge then adopts carbon fiber composite to make, and has lightweight effect;

At the inner edge of ring gear (20) and the outer rim of interior ring (30) is by a fixed structure (40) the two to be fixed, and (sees also Fig. 2) in the present embodiment, and this fixed structure (40) is for good with riveted construction;

For the Security of considering to move, riveted construction is to be a more flat structure, and like this, gear disk can avoid touching fixed structure (40) when rotating.

From the above mentioned as can be known, characteristics of the present utility model are, utilization is the interior ring (30) of material with the carbon fiber composite, and the ring gear (20) of cooperation aluminum alloy material, like this, because of the ratchet clamping part (50) of ring gear (20) outer rim needs often rub mutually with the chain (not shown), therefore need adopt the wear-resisting material of this kind of aluminum alloy, and interior ring (30) make the advantage that material-carbon fiber has in light weight, attractive in appearance, anti-oxidant, high specific strength and high specific rigidity.Yet again because of it has the characteristic of expanding with heat and contract with cold, therefore, ring gear (20) and interior ring (30) are reserved with a finedraw fixedly the time and form a spacing portion (60), see also Fig. 3, shown in Figure 4, and can not cause its structure of gear disk squeeze and destroy because of external factor.

Be the structure of a separated type because of ring gear (20) and interior ring (30) again, demand that can be different according to the user is made the interior ring (30) of different shaping, cooperates ring gear (20) again and designs and have more novel moulding, increases the variability of its vision.

In addition, because of ring gear (20) is to be a separated structures with interior ring (30), wherein the situation that damage occurs, break as if a certain assembly can be convenient to user's dismounting, change.

From the above, the utility model overcomes the existing shortcoming of existing bicycle gears dish in use fully, and has following advantage:

Ring gear in the utility model adopts aluminum alloy material, and interior ring is carbon fibre material, therefore has wear-resisting, in light weight, the fast advantage of riding, and the spacing portion that reserves of ring gear and interior interannular, can make carbon fiber that the space of stretching, extension is arranged; Compare with existing gear disk, have more practicability, and reach firm effect.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims

1, a kind of improved bicycle gears dish, comprise the gear disk body, it is characterized in that, this gear disk body is made up of ring in aluminum alloy ring gear and the carbon fiber composite, this ring gear outer rim is the ratchet clamping part that is dentation, for the chain engaging, ring is positioned at described ring gear inner edge in this, and ring gear inner edge and interior ring outer rim connect admittedly by a fixed structure.

2, improved bicycle gears dish according to claim 1 is characterized in that described ring gear and interior interannular are reserved with a spacing.

3, improved bicycle gears dish according to claim 1 is characterized in that described fixed structure is good with riveted construction.