CN2171037Y - Link plate of chain belt - Google Patents

Abstract

The utility model relates to a chain plate of a chain. A waist is formed on a plate body. Inwards concave arc edges are respectively formed on the upper end and the lower end of the waist, two circular arc end parts are respectively formed on the two sides of the waist, and two through holes are respectively arranged on the circular arc end parts. Endpoints on the upper arc edge and the lower arc edge of the waist having the shortest distance from an equivalent branch line are aslant arranged on the positions of the left upper angle and the right lower angle of the plate body. The width between any two points of the waist is greater than the linear distance from the through holes to the circumferential edge of the plate body. The design of the chain plate can enhance the smooth performance and the quick performance of the speed change of a chain.

Description

Link plate of chain belt

The utility model relates to a kind of carrier bar that is assembled on the chain, particularly relates to a kind ofly under the situation that does not influence plate body tensile strength, makes the reduced width of appropriate location on the plate body waist, improves the carrier bar of the chain of the smoothness of chain speed change and rapidness by this.

Existing chain in design mostly by: chain rolls, chain rivet, lining and inside and outside carrier bar are constituted, and simplifying of member, people's punching out bead on inner plate is arranged also, to replace the lining of existing chain.Chain rivet in the basic building block of above-mentioned chain is in order to articulating all members, and the function that chain rolls is: running flexibly.The inside and outside carrier bar that is oppositely arranged is then in order to form appropriate gap, for the location of the tooth on the fluted disc, because when aforementioned inside and outside carrier bar uses on multi-speed bicycle, often need displacement and clip on the side fluted disc, therefore, in the member of chain with the whether smooth and easy tool relevance of speed change should belong to this two member; The utility model is promptly improved at the inside and outside carrier bar on the chain, to improve the smooth degree of assembling chain speed change.

At first, see also Fig. 1, this is a kind of assembling plan view of existing chain; Common chain 1 mainly be between inner plate 11 2 ends of two correspondences respectively folder establish a chain and roll 12, and be provided with corresponding outer plate 13 in inner plate 11 outsides, be equipped with a chain rivet 14 between the perforation of aforementioned components correspondence,, member can be articulated fixing through the riveted of chain rivet 14 2 ends.

The design of existing chain 1 relevant outer plate 13 roughly as shown in Figure 2, it mainly is the end 131 that forms a circular arc in plate body two sides respectively, on two ends 131, run through a perforation 132 that supplies chain rivet 14 to wear, locate again, in two 132 of perforation then is a waist 133, above-mentioned waist 133 top and bottom ends are corresponding and symmetrical indent arc limit 134 about in the of two, apart from plate body bisectrix 15 nearest end points 135 just in time are positioned at the central authorities of waist 13 on the above-mentioned arc limit 134; By the design of outer plate 13 as can be known, it makes plate body two ends 131 form the circular-arc reason of expansion and is: this two position is provided with perforation 132, for fear of because the deficiency of perforation 132 the plate body that existence caused two ends 131 tensile strength, prevent the fracture of plate body by this, certainly, by the design of whole outer plate 13 as can be known, on its plate body from bore a hole 132 to the crow flight distance between the plate body frame for minimum, therefore, the tensile strength at this position is the most weak on the plate body, as for formed indent arc limit 134 on the waist 133, it is mainly with being intended to: make plate body in speed change and during lateral displacement, be easier to break away from the increment that fastens, this be outer plate 13 because of function need the plate body basic shape of deriving reason; As for the relevant essential structure of inner plate 11, and the principle of design is all identical with outer plate 13.

Though the previous constructions of existing chain 1 relevant inside and outside carrier bar 11,13 is used for many years, but when chain 1 desires to be converted to small tooth plate by large fluted disc, but still be difficult to reach the purpose that the expection speed change is smooth and easy, speed is prompt, cause the main cause of aforementioned disappearance to be: waist 111,133 designs on its plate body are still perfect not to the utmost; See also Fig. 3, this is a kind of speed change schematic representation of existing chain, as previously mentioned, article one, chain 1 in design, inside and outside in twos carrier bar 11,13 formed gaps, be used for tooth location for fluted disc, therefore, when chain 1 desires to be transformed into small tooth plate 3 by large fluted disc 2, originally the two corresponding plate bodys of clip on large fluted disc 2 increments 21 are necessary lateral displacement, and before displacement, except being subjected to dialling the effect of chain device, the carrier bar that originally is fastened on large fluted disc 2 increments 21 also must break away from engaging place, and speed change is carried out smoothly; By among the figure as can be known, when chain 1 desires to be transformed into small tooth plate 3 by large fluted disc 2, the corresponding position of desire disengaging increment 21 is subjected to the restriction of chain 1 specification on the oblique outer plate that fastens 13, it is not the centre that is positioned at waist 133 arc limits 134, but partially on waist 133 right sides, and the design of existing inside and outside carrier bar 11,13, its waist 111,133 the most 112,135 of the end points of indent in central authorities, so cause plate body to desire when other displacement, be subjected to stopping, limiting of the outstanding increment 21 of corresponding position, be difficult to be converted to small tooth plate 3 by large fluted disc 2 smoothly; Obviously, corresponding design about existing chain 1 is the waist of carrier bar is just seen on the practice, and can't be reached speed change purpose smoothly; Certainly, when plate body is stopped and smoothly during speed change, the rapidness of its speed change can descend naturally, the noise of speed change also can improve, and this is that unfavorable places are gone up in existing chain 1 relevant inside and outside carrier bar 11,13 designs.

The purpose of this utility model is that a kind of assembling chain is converted to the chain of small tooth plate smoothness and rapidness by large fluted disc carrier bar that improves is being provided.

The utility model proposes a kind of like this carrier bar of chain, it is respectively to be provided with a perforation for the chain rivet location in chain plate body two ends, and the chain plate body also is provided with waist between two ends, and the upper and lower end of waist forms the arc limit of indent respectively; And, apart from plate body the end points of bisectrix beeline is located at partially the upper left corner and the lower right corner of chain plate body on the arc limit.

Of the present utility model being characterised in that: form a perforation that supplies chain rivet to stretch through, locate on two ends of plate body respectively, between two ends, has a upper and lower waist that is equipped with an arc limit, this waist is located at the upper left corner and the lower right corner of plate body apart from plate body partially to the end points of bisectrix beeline, and the width of any point to point of this waist is greater than boring a hole to intermarginal crow flight distance of plate body week; By the restriction of aforementioned width, can keep the due tensile strength of carrier bar, the end points design that it establishes a side partially in the time of can making the assembling chain be transformed into small tooth plate by large fluted disc, reduces it and stops area, smoothness and rapidness when improving the chain speed change.

Be elaborated below by most preferred embodiment and accompanying drawing carrier bar to chain of the present utility model, in the accompanying drawing:

Fig. 1 is a kind of combination plan view of existing chain.

Fig. 2 is a kind of combination of side view of existing chain.

Fig. 3 is a kind of speed change schematic representation of existing chain.

Fig. 4 is the schematic representation of the outer plate of the utility model preferred embodiment.

Fig. 5 is the schematic representation of the inner plate of the utility model preferred embodiment.

Fig. 6 is the inner plate plan view of the utility model preferred embodiment.

Fig. 7 is that the utility model preferred embodiment is assembled in the schematic representation on the chain.

Fig. 8 is that the utility model preferred embodiment is assembled in the speed change schematic representation on the chain.

At first, see also Fig. 4, outer plate 4 of the present utility model has the end 41 of two circular arcs equally, a perforation 42 that supplies chain rivet to stretch through, locate is respectively run through in 41 central authorities in the end, in 41 of two ends is the waist 43 of a reduced width, and these waist 43 upper and lower ends also form the arc limit 431,432 of an indent respectively; The main design focal point of present embodiment is: apart from plate body the end points 433 of bisectrix 44 beelines is located at the plate body left side partially on the arc limit 431, and be positioned at the below arc limit 432 on apart from this end points 434 to bisectrix 44 beelines, then be located at the right side of plate body partially, the width that this two end points is 433,434 is roughly the same, and the distance of any point to point is all greater than boring a hole 42 to intermarginal crow flight distance 421 of plate body week on the moulding rear waist 43.

What the foregoing description was disclosed is the outer plate of chain, and previous constructions also can be used on the inner plate of chain; See also Fig. 5, Fig. 6, the inner plate 5 of present embodiment also has the end 51 of two circular arcs, also be respectively equipped with a perforation 52 on two ends 51, above-mentioned perforation 52 aperture inwalls replace the bead 521 that has chain bushes now to having one again, are provided with a waist 53 equally in 51 of two ends; And this embodiment's model utility feature is equally: the formed indent arc of the waist 53 upper and lower ora terminalis limit 531,532 of plate body, apart from plate body the end points 533,534 of bisectrix 54 beelines is distinguished the inclined to one side upper left corner and the lower right corner at plate body on it, after the moulding, the distance of waist 53 any point to points is all greater than perforation 52 crow flight distances 522 to the plate body periphery.

Please cooperate Fig. 7, Fig. 8, when the utility model after assembling, the waist 53,43 of inside and outside carrier bar 5,4 is positioned at the end points 534,434 of below one side partially on the plate body right side, and waist 53,43 is apart from bisectrix 54,44 another nearest end points 533,433 then are positioned at the upper left corner; When chain 6 desires to be converted to small tooth plate 8 by large fluted disc 7, since inside and outside carrier bar 5,4 from position that large fluted disc 7 breaks away from partially in the lower right corner, and the utility model position is in the indent end points 534,434 in plate body lower right corner indent the most, also be, it designs mat in the indent of a side partially, can make the effect interface of plate body corresponding position and large fluted disc 7 increments 71 therefore dwindle, make inside and outside carrier bar 5,4 be hightailed the sprocket wheel that is originally cooperated, promote its speed change smoothness and rapidness by this.Certainly, when two members friction probability reduced, therefore the noise of its speed change will descend, and makes in its transmission more perfect.

By above explanation as can be known, the utility model makes the upper left corner and the place, the lower right corner that apart from plate body the end points of bisectrix beeline are located at partially plate body on the arc limit with two arc limit shape changes on the carrier bar waist.The change of carrier bar shape, not only can because of any point to point of its waist distance greater than boring a hole to the crow flight distance of plate body periphery, and be unlikely the intensity of haling that has influence on plate body, when previous designs also can make chain be transformed into small tooth plate by large fluted disc, realize stopping the purpose of area minimizing, smooth and easy, the fast victory of speed change and low noise.

Claims (1)

1, a kind of carrier bar of chain, it is respectively to be provided with a perforation for the chain rivet location in chain plate body two ends, and the chain plate body also is provided with waist between two ends, and the upper and lower end of waist forms the arc limit of indent respectively; It is characterized in that: the upper left corner and the place, the lower right corner that apart from plate body the end points of bisectrix beeline are located at partially the chain plate body on the arc limit.

Images