CN2617670Y

CN2617670Y - Crank with improved structure

Info

Publication number: CN2617670Y
Application number: CN 03245428
Authority: CN
Inventors: 江承勋; 安松尼·大卫·米歇尔
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-14
Filing date: 2003-04-14
Publication date: 2004-05-26
Anticipated expiration: 2013-04-14

Abstract

The utility model relates to a crankshaft with improved structure, comprising a crankshaft body with a first joint block and second joint block. A carbon fiber core is arranged inside the crankshaft body; the first and second joint blocks are wrapped at two ends of the core and a claw is arranged at one end of the core to form a layer of carbon finer outside; a claw is also extended at one end outside, the combination of the structures is to form a complete bicycle crankshaft to overcome the defect that metal is used as claw in known structure, and also get rid of failure to complete lightweight of the crankshaft and claw in a crankshaft with known material. The utility model is to make use of property of carbon finer for smooth crankshaft structure improved to reserve high intensity of material and reduce the weight of the whole structure. In the forming process of product, the carbon fiber fails to show any folding trace, the high intensity is ensured for effective reinforcement of whole structure performance.

Description

Structure improved crank

Technical field

The utility model relates to a kind of crank, particularly relates to a kind of structure improved crank that is used for bicycle.The full carbon fiberization of the utility model utilization can make the crank body comprise that the weight of claw reaches the lightest, has reduced the integrally-built weight of crank.

Background technology

The current bicycle bound pair is more and more paid attention in the use of composite material, so common part that has multi-form composite material can be used in bicycle, for crank, previous bicycle crank is to make with solid iron material, though face shaping is more not attractive in appearance, but truly have enough intensity, in recent years for pursuing the weight-saving demand, how to have adopted the carbon fiber material to make, wherein Taiwan patent announcement No. 503909 " bicycle crank structure " mainly is to utilize before crank, the master of rear end, one end of secondary aluminum component is extended with fin, be coated on the master with carbon fiber again, the outside of secondary aluminum component, and form a crank, the defective of this kind structure is: because of the crank of this structure is to assemble after shaping, be not to adopt carbon fiber composite material on the whole, wherein main, secondary aluminum component is another kind of metal material, therefore on the crank integral structure, be formed with various material, and different materials is formed on the crank, when crank is stressed, can be because of the difference of structure material, and the power of bearing is also different, can cause structural strength to reduce like this, moreover before the known crank, the rear end utilizes aluminium shaping aluminium flake, also make crank single-piece weight increase the weight of, still can't reach the crank of so-called full carbon fiber.In addition, the crank of conventional construction needs earlier major and minor aluminum component moulding when moulding, and an end of major and minor aluminum component need be formed with fin in addition, utilizes carbon fiber Overmolded again, and it makes flow process again than previous complexity.

This shows that above-mentioned existing bicycle crank still has many defectives, and demands urgently further being improved.

Because the defective that above-mentioned existing crank exists, the inventor is actively studied innovation, through constantly studying, designing based on abundant practical experience and expertise, and after studying sample and improvement repeatedly, create the utility model that has practical value finally.

Summary of the invention

Main purpose of the present utility model is, overcome the defective that existing crank exists, and a kind of structure improved crank is provided, technical problem underlying to be solved is to make structure improved crank structure smooth and easy, overall weight alleviates, and keeps its original high strength constant.

The purpose of this utility model and solve its technical problem underlying and realize by the following technical solutions.

A kind of structure improved crank, mainly comprise a crank body, this crank body is provided with first combined block and second combined block, wherein the crank body interior is provided with the core of a carbon fiber, coat first and second combined block of gummed respectively at the two ends of core, and externally form a carbon fiber layer, the bicycle crank that the combined formation of said structure one is complete.

The purpose of this utility model and solve its technical problem underlying and also can adopt following technical measures further to realize.

Aforesaid structure improved crank, an end of wherein said core is extended with claw, and an exterior end is extended with claw equally.

Aforesaid structure improved crank, the outer-diameter ring of wherein said first combined block is provided with bulge loop.

The utility model compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, it is the shortcoming of metal material that the utility model has been improved the conventional construction claw, has also improved in the known composite material crank, and body and claw can't one weight-saving shortcomings.This utility model is utilized the characteristic of carbon fiber, makes that the crank structure after the improvement is smooth and easy, not only maintains high-intensity material behavior, and has reduced integrally-built weight.Because the carbon fiber material shows no sign of and folding line occurs in the formed product process, therefore guaranteed high-strength characteristic, and effectively strengthened the single-piece structural behaviour.

In sum, the structure improved crank of the utility model special construction, have above-mentioned many advantages and practical value, and in like product, there is no similar structure design and published or use,, and had large improvement technically no matter it structurally or bigger improvement is all arranged on the function, and produced handy and practical effect, and have the effect of enhancement really, thus be suitable for practicality more, really be a new and innovative, progressive, practical new design.

Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification sheets, below with preferred embodiment of the present utility model and conjunction with figs. describe in detail as after.

The specific embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.

Description of drawings

Fig. 1 is a partial cutaway schematic of the present utility model;

Fig. 2 is another part sectional view of the present utility model;

Fig. 3 is the block diagram of Fig. 2;

Fig. 4 is a section-drawing of the present utility model;

Fig. 5 is the block diagram of Fig. 4;

Fig. 6 is the partial cutaway schematic of the utility model second embodiment;

Fig. 7 is another part sectional view of the utility model second embodiment;

Fig. 8 is the section-drawing of the utility model second embodiment;

Fig. 9 is the block diagram of Fig. 7;

Figure 10 is the block diagram of Fig. 8.

The primary clustering nomenclature:

10-----body 20-----first combined block

21-----through hole 22-----bulge loop

The 30-----second combined block 31-----through hole

40-----core 40 '----core

41-----hole 50-----resin bed

50 '----resin bed 60-----outsides

60 '----outsides

The specific embodiment

Below in conjunction with accompanying drawing and preferred embodiment, to according to the structure improved crank that the utility model proposes, its specific embodiment, structure, feature and effect thereof, describe in detail as after.

The utility model is about a kind of structure improved crank, see also Fig. 1, Fig. 2, shown in Figure 3, the structure improved crank of the utility model mainly comprises a crank body 10, this crank body 10 is provided with first combined block 20 and second combined block 30, this is first years old, two combined

blocks

20,30 internal diameters are formed with through hole 21,31, and the external diameter at first combined block 20 is equipped with a bulge loop 22 at least, utilize carbon fiber with first, two combined

blocks

20,30 coat gummed, first, two combined

blocks

20,30 form core 40, and an end of this core 40 is extended with claw, be formed with hole 41 in the end of claw, and the design of mat bulge loop 22, can make the bonding area of 22 of carbon fiber and bulge loops bigger, and can go deep into core 40 makes the two in conjunction with more firm, see also Fig. 4, shown in Figure 5, be coated with a resin bed 50 at core 40, utilize carbon fiber will be coated with the core 40 and first of resin bed 50 again, two combined

blocks

20,30 coat, and form an outside 60, an end externally is extended with claw equally, the bicycle crank that the combined formation of said structure one is complete.

See also Fig. 4 again, shown in 5, it is the constructional drawing of the structure improved crank of the utility model, these core 40 1 ends are outward extended with a claw, and the ora terminalis in claw forms hole 41, and outside 60 1 ends that coat core 40 are extended with claw equally, because of the utility model is a material with full carbon fiber, can make crank body 10 comprise that the weight of claw reaches the lightizationest, it has reduced integrally-built weight, having improved the conventional construction claw is the shortcoming of metal material, also improved in the known composite material crank, body and claw can't one weight-saving shortcomings, and crank body 10 structures of the utility model institute moulding are smooth and easy, and the carbon fiber material shows no sign of and folding line occurs, has guaranteed high-intensity material behavior, the moulding degree of freedom of carbon fiber is big again, therefore no matter can make the product shape of streamline contour or new trend, for structure or outward appearance, be a quantum jump of bicycle industry really; Again,, be different from the common metal shape, further promoted the moulding and the value of product, have very much a practicality with the outward appearance of advanced composite materials carbon fiber cloth line as product.

The utility model also can be applicable to the opposite side crank of corresponding claw crank, see also Fig. 6, Fig. 7, Fig. 8, Fig. 9, shown in Figure 10, at first and second combined

block

20,30 places, utilize carbon fiber that first and second combined

block

20,30 is coated gummed, 20,30 formation of first and second combined block core 40 ', core 40 ' a be coated with resin bed 50 ', utilize again carbon fiber will be coated with resin bed 50 ' core 40 ' and first and second combined

block

20,30 coat, form an outside 60 '.

In sum, the crank structure of the utility model carbon fiber moulding improvement, structure is smooth and easy, not only maintain high-intensity material behavior, and reduced integrally-built weight, and the moulding degree of freedom is big, can make the product shape of streamline contour or new trend, practicality is arranged very much, and, make the crank body comprise that the weight of claw reaches the lightizationest because of the utility model is a material with full carbon fiber, it can reduce integrally-built weight really, having improved the conventional construction claw is the shortcoming of metal material, has also improved in the known composite material crank, and body and claw can't one weight-saving shortcomings.The utlity model has above-mentioned many advantages and practical value, and having there is no similar structure design in like product publishes or uses, no matter it structurally or bigger improvement all arranged on the function, and have large improvement technically, and produced handy and practical effect, and have the effect of enhancement really, thus be suitable for practicality more, really be a new and innovative, progressive, practical new design.

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 structure improved crank mainly comprises a crank body, and this crank body is provided with first combined block and second combined block, it is characterized in that:

The crank body interior is provided with the core of a carbon fiber, coats first and second combined block of gummed respectively at the two ends of core, and externally forms a carbon fiber layer, the bicycle crank that the combined formation of said structure one is complete.

2, structure improved crank according to claim 1 is characterized in that an end of described core is extended with claw, and an exterior end is extended with claw equally.

3, structure improved crank according to claim 1 is characterized in that the outer-diameter ring of described first combined block is provided with bulge loop.