CN2120219U

CN2120219U - Link of chain for bicycle

Info

Publication number: CN2120219U
Application number: CN92205970U
Authority: CN
Inventors: 吴俊德
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-04
Filing date: 1992-04-04
Publication date: 1992-10-28

Abstract

The utility model relates to a link plate of a chain for bicycles, which has the main structure that the waist part between the two through holes of the link plate is stamped to form a specifically moulded protrusion from outside to inside; the bottom edge of the protrusion is paralleled with the outer edge of the plate body of the inner plate and an arc guiding face is re-formed from the top and the bottom basicostas to the bottom edge of the protrusion. When the chain changes speed, the pinions of the chain wheel can be clamped into the gap between the two link plates and then rapidly shift inwards by the circle arc guiding face of the link plate so as to be smoothly embed into the position between the two link plates; because the inwards embossed protrusions reasonably shorten the distance between the two link plates, the noise produced by the friction between the pinion and the running chain.

Description

Link of chain for bicycle

The carrier bar of the relevant a kind of bicycle chain of the utility model is meant a kind of gearshift performance sensitivity, quick and the noise amount is low especially.

Common bicycle has the difference of so-called single hop bicycle and multistage multi-speed bicycle, and the single hop bicycle is meant chain across being located between the forward and backward sprocket wheel, and transmission speed is permanent to keep certain; And the drive state of multistage multi-speed bicycle as shown in Figure 1, is a sprocket wheel 11 before 10 assemblings of two pedals are a plurality of, and installs most the different back sprocket wheels 13 of diameter on rear-wheel spindle 12, strides between the above-mentioned forward and backward

sprocket wheel

11,13 again and establishes chain 2; When chain 2 is crossed between the forward and backward

sprocket wheel

11,13, its transmission speed can keep certain, and when chain 2 be subjected to dial stirring of chain device and sprocket wheel 13 be moved to another after ' when going up, can because of two afterwards sprocket wheels 13,13 ' between the difference of the number of teeth, and produce different transmission speed; The number of the variable hop count of above-mentioned bicycle is decided with forward and backward

sprocket wheel

11,13 quantity.

Fig. 2 is the assembled sectional view of conventional chains, when above-mentioned chain 2 when carrying out speed change, therefore because of its inside and

outside carrier bar

21,22 one-tenth planars, when snapping into another sprocket wheel, be easy to generate the shortcoming of speed change difficulty oblique; In order to improve above-mentioned shortcoming, common usage mode is that distance between two inner plates and two outer plates is strengthened at present, so can make the sprocket of sprocket wheel more easily be directed between above-mentioned inner plate or the outer plate, strengthen the chain distance between plates from means probably can be divided into two kinds again, a kind of be make outer plate two the perforation between the outside relief of central position, another kind is that lateral margin forms the lead angle of inclination about carrier bar, so that distance increases between two outer plates, and make things convenient for the sprocket of sprocket wheel to import, as shown in Figure 3, mainly be two inner plates 21 ', two perforation between lateral margin up and down, each form scarf 211 ', so that enlarge a little two inner plates 21 ' spacing, and outer plate 22 ' except on plate body, forming scarf 221 ', also the central position formation floating convex 222 between two perforation '.The above-mentioned floating convex 222 of mat work ' formation, can enlarge more 22 of two outer plates ' width so that the chain of assembling more is easy to generate gear shifting operation.

The processing mode of above-mentioned chain no doubt can make the assembling chain produce speed change advantage smoothly.But make virtually that also chain produces another shortcoming, in the past chain with two chain distances between plates from increasing, and the sprocket wheel sprocket that is imported still must be kept identical transverse tooth thickness, just can link the purpose that enlarges width between two carrier bars, so, when above-mentioned sprocket is embedded in two carrier bars, the space that is positioned at the sprocket periphery is bigger, when sprocket imports easily and the member on the chain (as: inner plate or chain roll etc.) collide, and when chain runs well between two carrier bars because of excesssive gap, easily deflect, produce noise and hit sprocket, therefore, chain was in order to reach speed change purpose smoothly in the past, be easy to generate friction between chain and the sprocket, send noise, and seem desirable not to the utmost.

Therefore, it is more smooth and easy, quick that main purpose of the present utility model provides a kind of speed change, and the carrier bar of the bicycle chain that noise content is low during transmission.

And, major character of the present utility model is: punching press forms protuberance in the carrier bar two perforation mediads of chain, the protuberance bottom is slightly concordant with the plate body of inner plate, to make chain sprocket when the speed change can be smoothly import rapidly between two carrier bars by the guiding face of protuberance, more all concordant approximately with the inner plate root edge because of width between two protuberances of setting up relatively, can make on the chain each consistent, to avoid in the transmission chain because of deflecting with the space of sprocket tabling.And with the sprocket wheel of engaging between produce mutual friction mutually.

For realizing above-mentioned technology, means and effect thereof, now enumerate preferred embodiment and cooperate graphic, be described in detail in the back, wherein the diagram be respectively:

Fig. 1 is the use schematic representation of general multi-speed bicycle.

Fig. 2 is the combination schematic representation of conventional chains.

Fig. 3 is a kind of chain combination schematic representation that in the past was used on the multi-speed bicycle.

Fig. 4 is the utility model first embodiment's an inner plate plan view.

Fig. 5 is the utility model first embodiment's an inner plate front view.

Fig. 6 is the utility model first embodiment's an outer plate plan view.

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

Fig. 8 is that the utility model second embodiment is assembled in the schematic representation on the chain.

Fig. 9 is the utility model the 3rd embodiment's an inner plate front view.

Figure 10 is the utility model the 3rd embodiment's an inner plate plan view.

Figure 11 is the utility model the 3rd embodiment's an outer plate front view.

Figure 12 is that the utility model the 3rd embodiment is assembled in the schematic representation on the chain.

Figure 13 is the utility model the 4th embodiment's an inner plate front view.

Figure 14 is the utility model the 5th embodiment's an outer plate front view.

At first, see Fig. 4,5, the utility model first embodiment's inner plate 3 is to form perforation 31 respectively in plate body both sides arc end part, perforation 31 downward punching presses form protruded stigma 311, to replace the lining of chain (the non-this case model utility of this part in the past, do not describe in detail at this), waist 32 outside punching presses in 31 of two perforation form projection floating convex 321, on the above-mentioned waist 321, following both sides slope inwardly and form lead angle 322, directly form the protuberance 323 of spherical shape to punching press in waist 32 central ecto-entads, protuberance 323 root edges are slightly concordant with the plate body inner edge, form the guiding face 324 of ring circular arc between 323 basicostas in root edge to protuberance.

Now, see Fig. 6, the outer plate 4 of present embodiment also forms perforation 41 respectively at plate body two arc ends, the less waist 42 of formation width in 41 of two perforation, waist 42 downward punching presses form the protuberance 421 of spherical shape, the height that protuberance 421 is given prominence to is mutually concordant with inner plate 3 root edges on the assembling chain that cooperatively interacts, and its root edge is to the same circular arc guiding face 422 that forms between protuberance 421 basicostas.

See Fig. 7, when present embodiment is combined in chain 5, have protruded stigma 311 1 ends all towards chain 5 inboards, and the floating convex 321 that is positioned at inner plate 3 central authorities is outwards outstanding, stamping forming protuberance 323 is set up relatively and is positioned at chain 5 inboards; Outer plate 4 has protuberance 421 1 ends then towards the inner side surface of chain 5.When chain 5 that present embodiment made up during in speed change, sprocket is by interior on the bicycle chainwheel, outer plate 3, on 4, be inserted at following two end part, at this moment, sprocket can be by in two,

outer plate

3,4 guiding face 324,422 slip in space between the two, because of protuberance 323, between 421 root edges between the plate body inner edge of width and inner plate 3 distance roughly the same, therefore, snap in two,

outer plate

3,4 sprocket can be because of protuberance 323,421 qualification and locating, to avoid in two,

outer plate

3,4 width are too big, cause chain 5 when the transmission beat, to collide, and produce noise with the chain that snaps in.

Outer plate 4 shown in the previous embodiment, be flat plate body, but in order to make assembling chain 5 more smooth and easy when the speed change, outer plate 4 structures also can be as shown in Figure 8, make the punching press of outer plate 4 ' central waist 42 ' outwards form floating convex 421 ', the protuberance 422 of same outstanding spheroidal in waist 42 ' inboard ', above-mentioned protuberance 422 ' root edge is mutually concordant with assembling inner plate 3 ' inboard root edge equally, to promote the smoothness of chain 5 ' speed change.

The protuberance that aforementioned two embodiments are given prominence in inside and outside carrier bar inboard all is a spherical shape, but in order to reach the model utility purpose of this case, protuberance also can form other specific any moulding.Shown in Fig. 9,10, the utility model the 3rd embodiment's inner plate 61 structures are roughly with identical shown in first embodiment, and with first embodiment different place be: the protuberance 612 of waist 611 central authorities is ovalizes, basicosta is to the guiding face 613 that forms arc between root edge, and guiding face 613 root edges are concordant with the plate body inner edge of inner chain sheet 61.

And the outer plate that matches with aforementioned inner plate 61 structure as shown in figure 11, and the protuberance 621 of outer plate 62 bottoms is oval body, and basicosta is to also having guiding face 622 between root edge.

Cooperate Figure 12, when present embodiment is combined in chain 6, the protuberance 612 of inner plate 61 all the position in chain 6 inboards, and the protuberance 621 of outer plate 62 is positioned at the inner side surface of chain 6 equally, therefore, and when chain 6 is expert at gear shifting operation, the sprocket of bicycle chainwheel can be embedded in the gap of 62 of two inner plates 61 or outer plates, and penetrate with rapidly between the two inside and

outside carrier bars

61,62, to reach speed change effect smoothly along the guiding face 613,622 of two protuberances 612,621.

Goodbye Figure 13, the structure of the utility model the 4th embodiment's inner plate is roughly identical with first embodiment, and is with first embodiment's difference: the protuberance 71 of inner plate 7 is rectangle, and both sides form the arc surface 712 of symmetry; Above-mentioned change can make the sprocket of sprocket wheel be easy to slip between two inner plates 7 equally, the noise content during with the reduction chain operation.

Again, as Figure 14, the utility model the 5th embodiment's outer plate 8 is to form protuberance 811 on waist 81, different with previous embodiment institute be in: protuberance 81 assumes diamond in shape, the formation of the above-mentioned protuberance of mat work.Can make the sprocket of sprocket wheel be easy to be embedded between two outer plates equally, and can reduce the noise of chain operation.

The utility model no matter the protuberance on the carrier bar be any geometrical shape (for example: triangle ...), all can make the chain of combination have low noise and speed change effect smoothly equally.

By above explanation as can be known, the utility model forms the protuberance of a geometric modeling on the central waist of carrier bar, can make the utility model produce effect as described below really.

(1) sprocket that fastens during chain operation can not rub mutually with other member of chain, to reduce assembling chain transmission noise: the utility model is outstanding respectively protuberance on two carrier bars, can make space between two carrier bars all with two inner plate plate bodys between distance identical, so when chain runs well, the chain of assembling can not produce left-right deviation, and produce friction with the sprocket that engages, and therefore, friction and noise when the above-mentioned change of the utility model can reduce chain operation really.

(2) sprocket of sprocket wheel is easy to be directed between two carrier bars during speed change, to reach speed change effect smoothly, the utility model is formed protuberance on carrier bar, because of root edge is formed with guiding face, can help sprocket to be easier to be directed in rapidly between two carrier bars, smooth and easy with the speed change that increases the assembling chain; Certainly, if the utility model is when inside and outside carrier bar forms the floating convex of relief, more can increase sprocket and import easness between two carrier bars, so the utility model also has speed change effect smoothly.

Claims

1, a kind of carrier bar of bicycle chain, the carrier bar two end part form perforation respectively, it is characterized in that: the central position ecto-entad punching press between two perforation forms the protuberance of given shape, and the protuberance root edge is concordant with the inner plate inner edge of chain.

2, by the carrier bar of the described chain of claim 1, it is characterized in that protuberance is semi-convex sphere.

By the carrier bar of the described chain of claim 1, it is characterized in that 3, protuberance is oval.

4, by the carrier bar of the described chain of claim 1, it is characterized in that protuberance is a rectangular.

5, by the carrier bar of the described chain of claim 1, it is characterized in that protuberance is a rhombus.