CN2763169Y

CN2763169Y - Chain-guard with less contacting to its chain

Info

Publication number: CN2763169Y
Application number: CN 200420116317
Authority: CN
Inventors: 温宜玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-01
Filing date: 2004-12-01
Publication date: 2006-03-08
Anticipated expiration: 2014-12-01

Abstract

The utility model relates to a chain disc with less contacting to a chain, which is provided with a disc body, wherein a plurality of equispaced chain gear forming parts are formed around the outer circumference of the disc body. A plurality of groups of equispaced chain gear assemblages are orderly distributed on the circle of chain gear forming parts. Spaces between the chain gear assemblages are equal and comprise more than one chain gear extended from the chain gear forming parts. Convex-arc-shaped holding parts are extended from the disc body towards the end faces of both sides corresponding to the chain gear forming parts. Because the inconsecutive chain gears can reduce the interference frequency happening when the chain gears are driven by chains, driving is smooth. Due to the enhancement of the arranged holding part and the strength of the engaged chains, the driving is positively reliable.

Description

Reduce the chain drum of interfering with chain

Technical field

The utility model relates to a kind of chain drum that applies to bicycle, and it is discontinuous and reduce the chain drum of interfering minimizing with the chain interference of occurrence frequency with chain particularly to relate to a kind of sprocket.

Background technology

General existing chain drum is installed on the bicycle; drive or drive chain that it is subjected to the chain circle to live half of and mutual interlock and can be subjected to chain; but chain is when transmission; it begins and outward extending part of chain drum interlock place and the tight state of nonideal straight line; but be subjected to the sagging bowed state of gravitating; so itself and the chain drum that rotates; regular meeting interferes during beginning interlock place of its sprocket; and fixing frequency arranged; feel to have some setbacks when in the middle of transmission process, often making user's pushes pedals, therefore be necessary to reduce the generation of interference to reduce user's sense of discomfort though interference like this is small.

But the generation that reduces interference promptly will be set about with the source that interferes, therefore inventor's design reduces the quantity of sprocket on the chain drum, but it is weakening of rigidity that the efficient that promptly means transmission that reduces the quantity of tooth reduces, and therefore general existing chain drum also can't solve the problem of interference with these means.

Please refer to M243426 number " can be used on the chain drum of bicycle " novel patent case of letter patent book number of TaiWan, China, this creates for the inventor is previous, be on chain drum, to have set up support sector to increase the interlock of chain drum to chain, and improved whole rigidity intensity, but the chain drum that can be used on bicycle of previous utility model, the setting of its sprocket is continuous setting, and can't solve the problem that causes transmission to have some setbacks with the chain interference, but its design that has strengthened rigidity and increase and chain interlock makes the design that reduces sprocket number and then minimizing and the generation of chain interference frequencies become feasible.

This shows that the above-mentioned existing chain drum that can be used on bicycle obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem of the chain drum existence that can be used on bicycle, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.

Because the defective that the above-mentioned existing chain drum that can be used on bicycle exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and expertise, and cooperate the utilization of scientific principle, actively studied innovation, in the hope of founding a kind of new structure, reduce the chain drum of interfering, can improve the general existing chain drum that can be used on bicycle, make it have more practicality with chain.Through constantly research, design, 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 inconvenience and defective that the above-mentioned existing chain drum that can be used on bicycle exists, and the chain drum that provides a kind of minimizing of new structure and chain to interfere, technical matters to be solved is to make it provide a kind of to reduce the chain drum of interfering with chain, thereby is suitable for practicality more.

The purpose of this utility model and to solve its technical matters be to adopt following technical scheme to realize.According to a kind of chain drum of interfering that reduces that the utility model proposes with chain, it is provided with a disk body, this disk body outside periphery ring around the sprocket formation portion that forms a plurality of intervals and each each chain sheet of corresponding chain, lay the sprocket combination of plural groups space in regular turn in this circle sprocket formation portion, the combination of each sprocket comprises more than one being stretched by each adjacent sprocket portion of formation establishes the sprocket that forms, and each sprocket combination space more than one sprocket formation portion, this disk body is in the thickened section of at least one end face formation than sprocket formation portion evagination, the periphery of each thickened section and respectively to should each sprocket formation portion forming the support sector of a plurality of prominent arcuations be beneficial to the concavo-convex relative of strength transmission so that each support sector can form with the interior radian of chain-sheet of chain.

The purpose of this utility model and solve its technical matters and can also be further achieved by the following technical measures

The chain drum that aforesaid minimizing and chain are interfered, wherein said each sprocket combination is to comprise a sprocket, and each sprocket combination space sprocket formation portion.

The chain drum that aforesaid minimizing and chain are interfered, wherein said each sprocket combination is to comprise two sprockets, and each sprocket combination space sprocket formation portion.

The chain drum that aforesaid minimizing and chain are interfered, wherein said disk body at both ends face all forms described thickened section.

The chain drum that aforesaid minimizing and chain are interfered wherein, is stretched to establish in the sprocket formation portion that does not form described sprocket and is formed short auxiliary tooth.

The utility model compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, the technological means that the utility model used is to provide a kind of chain drum of interfering with chain that reduces, it is provided with a disk body, this disk body outside periphery ring around forming a plurality of equally spaced sprocket formation portion, lay the equally spaced sprocket combination of plural groups in regular turn in this circle sprocket formation portion, be uniformly-spaced between the combination of each sprocket and comprise more than one and stretch the sprocket of establishing by the sprocket portion of formation, and the support sector that disk body extends prominent arcuation to corresponding each the sprocket formation portion of two side ends face; The utility model reduces the frequency that takes place with the chain interference of tooth when being subjected to chain gear by discontinuous sprocket, makes transmission more smooth and easy by this, and because being provided with of support sector strengthens and the intensity of chain interlock, makes transmission infallible.

By technique scheme, the utility model reduces the chain drum of interfering with chain and has following advantage at least:

1, the utility model makes when being subjected to chain gear that with sprocket combination discontinuous and that form at interval chain reduces with the frequency that each chain interference of tooth takes place, and making has obstacles in the rotation process reduces and smoothness more.

2, because the setting of each support sector of the utility model, make the utility model reduce and reach when being subjected to the smooth and easy effect of chain gear with the chain number of teeth, still can actv. and the tight interlock of chain and transferring power.

In sum, the chain drum that the minimizing of the utility model special construction and chain are interfered, it has above-mentioned many advantages and practical value, and in like product, do not see have similar structure design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and the more existing chain drum that can be used on bicycle has the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive value of industry, really be a novelty, 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 the chain drum of the utility model first preferred embodiment and the exploded perspective view of chain.

Fig. 2 is the block diagram of the chain drum interlock chain of the utility model first preferred embodiment.

Fig. 3 is the combination section of the chain drum interlock chain of the utility model first preferred embodiment.

Fig. 4 is the combination section of another chain drum interlock chain of the utility model first preferred embodiment.

Fig. 5 is the chain drum of the utility model second preferred embodiment and the exploded perspective view of chain.

Fig. 6 is the part block diagram of the utility model the 3rd preferred embodiment.

10: chain drum 101: sprocket formation portion

11: sprocket combination 111: sprocket

12: thickened section 121: support sector

13: auxiliary tooth 20: chain

21: the chain sheet

The specific embodiment

For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to its specific embodiment of chain drum, structure, feature and the effect thereof of interfering according to the minimizing that the utility model proposes and chain, describe in detail as after.

See also Fig. 1, Fig. 2, Fig. 3, first preferred embodiment shown in Figure 4, the utility model reduces the chain drum of interfering with chain, and it mainly comprises:

The chain 20 that the utility model collocation is used,

One disk body 10, this disk body 10 be disc and in outer peripheral edges to should chain 20 each chain sheet 21 around forming a plurality of equally spaced sprocket formation portion 101, lay the sprocket combination 11 of plural groups space in this circle sprocket formation portion 101, each sprocket combination 11 is to comprise a sprocket 111 in first preferred embodiment, each sprocket 111 is to form portion 101 by each sprocket to stretch to establish and be formed on each sprocket and form portion 101, and each sprocket combination 11 is with the kenel setting apart from one another by a sprocket formation portion 101, and stretch in the sprocket formation portion 101 that does not form sprocket 111 respectively and establish the short auxiliary tooth 13 of formation one, wherein

This disk body 10 is at the both sides end face, formed the thickened section 12 thick than a circle sprocket formation portion 101, the periphery of two thickened section 12 and to should each sprocket formation portion 101 forming the support sector 121 of a plurality of prominent arcuations, it is wavy to make the periphery of each thickened section 12 present a circle in the both sides of a circle sprocket formation portion 101, and the recessed radian position, both sides of the evagination radian of each support sector 121 to be chain sheets 21 of corresponding chain 20 be eight shape, in addition this disk body 10 of the utility model also can be only therein the end face of a side form this thickened section 12, form a plurality of support sectors 121 and use in this thickened section 12.

See also second preferred embodiment shown in Figure 5, they are different with first preferred embodiment, be that its each sprocket combination 11 is to comprise two sprockets 111, two sprockets 111 are also stretched to establish by the adjacent sprocket portion of formation respectively and are formed, and be space sprocket formation portion 101 and laying between each sprocket combination 11, and there is no in the sprocket formation portion 101 that does not form sprocket 111 and to form an auxiliary tooth 13 short than sprocket 111.

See also the 3rd preferred embodiment shown in Figure 6, its with first preferred embodiment different be its only therein a side end face form this thickened section 12, and there is no in the sprocket formation portion 101 that does not form sprocket 111 and to form an auxiliary tooth 13 short than sprocket 111.

See also Fig. 3, shown in Figure 4, when the utility model chain drum 10 rotates, except that each sprocket 111 engaging chain 20, because the chain sheet 21 imploded arcs places of chain 20, be in harmony and be against in each support sector 121, when chain 20 is rotated, this chain drum 10 can provide the actv. contact surface to improve transmission rigidity and efficient by support sector 121, make chain 20 and the tight interlock of the utility model, and the utility model forms sprocket combination 11 via discontinuous interval, make when the utility model is subjected to chain 20 transmissions, chain 20 interferes the frequency that takes place to reduce with each sprocket 11, making has obstacles in the rotation process reduces and can be smooth more, and because the setting of each support sector 121 of the utility model, when the designs that make the utility model reduce with sprocket 111 number are reached and are subjected to the smooth and easy effect of chain 20 transmissions, and still can actv. and chain 20 tight interlocks and transferring power.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in the scope that does not break away from technical solutions of the utility model, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solutions of the utility model content, foundation technical spirit of the present utility model is to above any simple modification that embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.

Claims

1, a kind of chain drum of interfering with chain that reduces is characterized in that:

It is provided with a disk body, this disk body outside periphery ring around the sprocket formation portion that forms a plurality of intervals and each each chain sheet of corresponding chain, lay the sprocket combination of plural groups space in regular turn in this circle sprocket formation portion, the combination of each sprocket comprises more than one being stretched by each adjacent sprocket portion of formation establishes the sprocket that forms, and each sprocket combination space more than one sprocket formation portion, this disk body is in the thickened section of at least one end face formation than sprocket formation portion evagination, the periphery of each thickened section and respectively to should each sprocket formation portion forming the support sector of a plurality of prominent arcuations be beneficial to the concavo-convex relative of strength transmission so that each support sector can form with the interior radian of chain-sheet of chain.

2, the chain drum of minimizing according to claim 1 and chain interference is characterized in that wherein said each sprocket combination is to comprise a sprocket, and each sprocket combination space sprocket formation portion.

3, the chain drum of minimizing according to claim 1 and chain interference is characterized in that wherein said each sprocket combination is to comprise two sprockets, and each sprocket combination space sprocket formation portion.

4, the chain drum of interfering according to described minimizing of arbitrary claim and chain in the claim 1 to 3 is characterized in that wherein said disk body at both ends face all forms described thickened section.

5, the chain drum of interfering according to described minimizing of arbitrary claim and chain in the claim 1 to 3 is characterized in that wherein, stretches to establish in the sprocket formation portion that does not form described sprocket to form short auxiliary tooth.

6, the chain drum of minimizing according to claim 4 and chain interference is characterized in that wherein, stretches to establish in the sprocket formation portion that does not form described sprocket to form short auxiliary tooth.