CN2146605Y

CN2146605Y - Variable-speed bicycle chain

Info

Publication number: CN2146605Y
Application number: CN 93200531
Authority: CN
Inventors: 吴能家
Original assignee: KMC Chain Industrial Co Ltd
Current assignee: KMC Chain Industrial Co Ltd
Priority date: 1993-01-14
Filing date: 1993-01-14
Publication date: 1993-11-17
Anticipated expiration: 2003-01-14

Abstract

The utility model relates to a chain used for variable-speed bicycles, which has the main structure that a chain roller is assembled between two inner plates; a chain axis is penetrated among the chain roller and the two inner plates; an outer plate is respectively assembled on the two protruded ends of the chain axis. The utility model is characterized in that an inclined protrusion is arranged between the two ends of the outer plate; the terminal line of one side of the protrusion has an identical height with the plate body, and the other terminal line forms a height difference with the plate so as to make the center of the plate body form an outward inclined protrusion. When the outer plate is assembled on the chain, the terminal line which is provided with the height difference side and is positioned on the outer plate of the outside surface of bicycles turns to the center of a bicycle fluted disc, and the outer plate which is positioned on the inside is reversely arranged.

Description

Variable-speed bicycle chain

The utility model relates to the chain of a kind of use on multi-speed bicycle, is meant a kind ofly when safeguarding chain speed change agility especially, further reduces the noise of transmission and improves the chain of its speed change smooth degree.

In the past the structure of speed-changing chain 1 as shown in Figure 1, usually 11 assemblings of inner plate, one chain in two correspondences rolls 12, runs through a chain rivet 13 between the three, these chain rivet 13 2 projection ends 131 outer plate 14 that is pivoted respectively again.

Fig. 2 is the outer plate stereogram of speed-changing chain in the past; Chain 1 was in order to enlarge 14 distances 15 of two outer plates to make things convenient for speed change in the past, give prominence to the protuberance 142 of a bridge type in 141 outside punching presses of two perforation of outer plate 14, by the formation of this protuberance 142, can make the distance between two outer plates, 14 central positions expand as 16 by original 15.

As Fig. 3, the 4th, speed-changing chain was crossed on operative relation figure and the speed change schematic top plan view on the multi-speed bicycle in the past, multi-speed bicycle was in one group of preceding chain wheel set 22 by the coaxial setting of a plurality of fluted discs of 21 assemblings of two cranks in the past, assembling one rear flywheel group 24 on the rear-wheel spindle 23 of bicycle by the coaxial setting of a plurality of fluted discs, 1 of speed-changing chain is crossed on the wherein fluted disc of preceding chain wheel set 22 and rear flywheel group 24, at preceding chain wheel set 22 and rear flywheel group 24 other one group of chain device 25 or the speed changers 26 of being provided with respectively, to change chain 1 conveyor track, just make chain 1 finish gear shifting operation by this; With regard to the gear shifting operation of actual chain 1, chain device 25 is stirred and when producing gear shifting operation when chain 1 is subjected to dial, and is based on by the outer plate 14 outside the person of riding; Its gear shifting operation is during from speed changer 26, based on the outer plate 14 ' by the person of riding inboard; By diagram as can be known, speed-changing chain 1 was in order to enlarge two distances that are provided with relatively between outer plate 14,14 ' in the past, be that the mode that makes the plate body central position be the full wafer shape is outwards given prominence to, the improvement of above-mentioned structure can make group chain device 25 abut against fast at the plate body outer side surface because of the outstanding of outer plate 14,14 ' central position when stirring chain 1, and rapidly chain 1 is allocated on the variable speed rail, on the other hand, the increase of two plate body intermediate portions, latch 271 on the fluted disc 27 is slipped between two corresponding outer plates 14,14 ' easily, and reach speed change purpose smoothly.

But previous constructions has adverse influence to rear flywheel group 24, main cause is: preceding chain wheel set 22 fluted discs 27 quantity of general multi-speed bicycle are few, 27 distances of fluted disc are bigger in twos, when outer plate 14 plate bodys of chain 1 were outwards outstanding, its outstanding width is limited can not to cause chain 1 and 27 frictions of side fluted disc; But when speed change occurred in rear flywheel group 24, because of fluted disc 28 quantity of being assembled on the general rear flywheel group 24 reach seven sometimes, 28 width of fluted disc were minimum in twos; Under chain 1 was running well, the outer plate 14 of plate body evagination can dwindle the distance between outer side surface and side fluted disc 28 ', and causes friction and noise between chain 1 and fluted disc 28 '; When chain 1 when being transformed into than small tooth plate 28 than large fluted disc 28 ', the formation of protuberance 142 also can cause fierce and planar conflict, friction between the plate body outside and side large fluted disc 28 ', causes the speed change noise to produce, and reduces the smooth degree of chain 1 change.

The purpose of this utility model be provide a kind of can be when keeping chain speed change agility, further promote its speed change smooth degree and reduce the multi-speed bicycle chain of speed change noise.

The multi-speed bicycle chain that the utility model provides be by inside and outside carrier bar, chain roll and chain rivet etc. member is combined forms; Wherein, the plate body mediad of outer plate is given prominence to a skewed protuberance outward, and one of them is mutually concordant with plate body for upper and lower two end lines of this protuberance, forms a height difference between another end line and plate body; After outer plate assembling, the position has height difference between the outer side surface of bicycle and plate body end line is all towards the fluted disc center of bicycle, and the position then is reverse setting the bicycle inboard; When on the fluted disc of chain operation in preceding chain wheel set, because of its flare, outstanding protuberance setting, can keep chain speed change smooth and easy on preceding chain wheel set, therefore also can avoid outstanding collision, the friction that causes between member and fluted disc of plate body, and make speed-changing chain have effects such as speed change agility, smooth and easy and low noise when using.

The utility model changes over protuberance on the outer plate of chain and moves back the plane of inclination of pulling out, and two outer plates that are provided with are relatively oppositely assembled, wherein, the position has the end line of height difference one side towards the fluted disc center on the outer plate of bicycle outer side surface, this not only can keep the agility and the smooth degree of chain speed change on preceding chain wheel set, more can avoid chain outstanding because of outer plate, and the side fluted disc produces fierceness and abuts against, rubs in speed change, operation process and on the rear flywheel group, to reduce its transmission noise.

Technology for achieving the above object, means are now enumerated preferred embodiment and are cooperated the diagram detailed description, and wherein diagram is respectively:

Fig. 1 is the schematic top plan view of multi-speed bicycle chain in the past.

Fig. 2 is the outer plate schematic perspective view of multi-speed bicycle chain in the past.

Fig. 3 is that the multi-speed bicycle chain was striden the operative relation figure that is located at multi-speed bicycle in the past.

Fig. 4 is the schematic top plan view of multi-speed bicycle chain in the past.

Fig. 5 is the schematic perspective view of the utility model preferred embodiment multi-speed bicycle chain.

Fig. 6 is the outer plate stereogram of the utility model preferred embodiment multi-speed bicycle chain.

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

Fig. 8 is the outer plate side view of another preferred embodiment multi-speed bicycle chain of the utility model.

Fig. 9 is the 9-9 line sectional view of Fig. 8.

As Fig. 5,6, the utility model rolls 3 at 2 assemblings of two inner plates that are provided with relatively, one chain equally, central perforation plugs a chain rivet 4 between the three, and chain rivet 4 two projection ends are riveted an outer plate 5 respectively, and outer plate 5 two arc end part also form a perforation 51 that supplies chain rivet 4 to wear respectively; Wherein: 51 central positions of outer plate 5 two perforation are outstanding one protuberance 52 that tilts, turns up outwards, and these protuberance 52 1 side lines 521 and plate body are contour, form a height difference 53 between opposite side end line 522 and plate body; When aforementioned outer plate 5 is assembled on the chain, its two outer plate that relatively is provided with 5,5 ' go up and plate body between have a height difference 53 end line 522,522 ' be reverse setting.

As Fig. 5,7, when the utility model is assembled on the multi-speed bicycle, the position forms section and differs from 53 ' end line 522 ' the fluted disc center towards preceding chain wheel set 61 between the outer plate 5 ' of bicycle outer side surface and plate body, position end line 522 on the outer plate 5 of inner side surface is reverse setting, just away from the fluted disc center of preceding chain wheel set 61; When chain is subjected to dialling stirring of chain device 62 and when producing gear shifting operation, because of the outer plate 5,5 ' of inside and outside two side faces all has a protuberance that turns up 52,52 ', so can when group chain device 62 abuts against, rapidly it be allocated to another variable speed rail, and produce the phenomenon that speed change does not postpone; In the time of on chain is climbed than large fluted disc 612 than small tooth plate 611 on by preceding chain wheel set 61, because going up protuberance 52 ', outer side surface outer plate 5 ' turns up and 53 ' the one side design down of tool height difference, chain is striden to side large fluted disc 612 easily establish, and keep the smooth and easy and agility of chain speed change on preceding chain wheel set 61; When the some outer plates 5 of chain turn round to preceding chain wheel set 61 belows, Fig. 7 Central Plains originally down end line 522 ' can because of the conversion of chain up, in like manner, former one's own department or unit the outer plate 5 of inboard also can therefore make have height difference 53 1 sides end line 522 down, therefore, no matter how chain is changed, the position all can be towards the fluted disc central point on preceding chain wheel set 61 or the rear flywheel group 63 at the end line 522 ' that has height difference 53 ' one side on the outer plate 5 ' of outer side surface, and outer plate 5 end lines 522 of inner side surface also keep court away from the outer setting of fluted disc central point always; When chain is made gear shifting operation on rear flywheel group 63, on the inboard outer plate 5 and the end line 522 that forms height difference 53 between plate body down, therefore, only can give prominence to minimum width with the position of 631 correspondences of side fluted disc, and can avoid chain when running or speed change, to abut against mutually, rub with side fluted disc 631, to reduce the transmission noise of chain; Certainly, just be the two in the mutual friction of the undesired beat state of chain phase, collision, inconsistent position is the friction of only remaining wire also, and the more planar friction of chain, contact are for few.

In order further to increase the smooth degree of chain speed change, the utility model also can be shown in Fig. 8,9, except the protuberance 72 that 71 formation in outer plate 7 two ends one are tilted, a distal process goes out, form a chamfering 731,741 that tilts again respectively in protuberance 72 upper and lower two

end lines

73,74 inboards, to increase by two the width of 7 of outer plates is set relatively, and is more conducive to the speed change of chain.

Claims

1, a kind of multi-speed bicycle chain, it is that assembling one chain rolls between two inner plates that are provided with relatively, plugs a chain rivet between the three, the chain rivet two end part protrude in inner plate respectively, and the assembling outer plate, form the perforation that wears for chain rivet on these outer plate two ends;

It is characterized in that: outer plate has one and outwards is skewed protuberance on the plate body between two perforation, protuberance one end line and plate body are roughly contour, forms a height difference between another end line and plate body; When outer plate was assembled on the chain, the position forms height difference on the outer plate plate body of multi-speed bicycle outer side surface end line was towards fluted disc center one end, and the position is reverse setting at the outer plate of inner side surface.

2, according to the described chain of claim 1, it is characterized in that: the inboard, two end line positions of outer plate forms a chamfering that tilts respectively.