CN2168987Y

CN2168987Y - bicycle chain

Info

Publication number: CN2168987Y
Application number: CN 93220403
Authority: CN
Inventors: 王文滨
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-23
Filing date: 1993-07-23
Publication date: 1994-06-15
Anticipated expiration: 2003-07-23

Abstract

An external speed-changing bicycle chain, under the condition of not changing the distance of the chain, the arrangement of a tooth guide surface is utilized to enlarge the allowable space for meshing the chain and a tooth crest, and the chain is guided into a correct meshing position, so that the operation is smooth and the probability of chain disengagement is reduced; in addition, the arrangement of the convex part reduces the residual play after the chain is meshed with the sprocket and the friction area between the chain and the sprocket so as to reduce the noise generated by swinging collision or friction of the chain and the sprocket peak during operation.

Description

Bicycle chain

The utility model is relevant a kind of outer multi-speed bicycle chain, refers to a kind of chain that is staggered and is articulated mutually by inside and outside chain link especially, and should respectively have two parallel chain sheets by inside and outside chain link, and the existing chain configurations of this kind is needless to say given unnecessary details.

Chain link pitch and chain distance between plates are influenced by chain tooth diameter, transverse tooth thickness and the number of teeth, and international chain and the sprocket that is used in bicycle, complete already specification.In other words, the chain of bicycle use, its pitch and spacing must not arbitrarily change, in order to avoid influence the working life of chain.

Outer multi-speed bicycle is liked by masses deeply, for in response to the needs on the market, speed not constantly increases, but the axletree of bicycle can not increase according to ratio, for assembling the sprocket that how different gears compare, in order to avoid influence the Security of car body, so the manufacturer has only the thickness that suitably reduces sprocket, to overcome this problem.

Right sprocket thickness is gradually thin, and gear remains unchanged than still, so therefore chain link pitch and chain distance between plates must not be changed.

Based on the above mentioned facts, the chain of existing outer multi-speed bicycle cooperates with sprocket, still stays the problem that waits to solve.

The design of chain distance between plates can be meshed with sprocket rapidly when making chain operation, and general is big than the thickness at tooth peak all.During chain operation, because of play between sprocket tooth peak and carrier bar is still big, when bicycle running during in uneven road surface, chain more easily swing collision tooth peak or chain and positive friction teeth peak of sprocket engagement and life noise.Many again other outer multi-speed bicycles of speed, its chain must often be done quick transposition with sprocket and mesh, and the angle of this kind transposition engagement, the most obvious when healing at a high speed and heal low speed, the easy correct situation of speed change or disengaging of generation, moreover the speed of outer multi-speed bicycle now not constantly increases, and the angle of transposition engagement increases relatively, and it is serious that aforementioned disappearance then more becomes.

Desire solves the method for this problem, only has under the situation that does not change existing chain link pitch and chain sheet spacing, strengthens the engagement cleared space at chain and tooth peak, and sets about from the play between reduction tooth peak and chain sheet effectively.

Main purpose of the present utility model is to provide a kind of outer multi-speed bicycle special chain, and outer chain sheet inner side waist all is provided with parallel convex portion in it, with reduction tooth peak and chain sheet in running surplus play, and reduce both friction area.

Another purpose of the present utility model is to provide a kind of outer multi-speed bicycle chain outer chain sheet, outer chain sheet inner side waist edge is provided with the outward-dipping flank of tooth of leading in it, mesh between permission to increase chain and tooth peak, and guide chain is gone into the correct engagement position, so that speed change is smooth and easy, mat is prevented the anti-avulsion chain.

A kind of outer multi-speed bicycle chain that provides according to the utility model, be in interior outer chain sheet inner side waist, be provided with two convex portions, this two convex portion has a crest line separately, and extended to dorsad between the abutment line of this inner chain sheet outer surface by this two crest line, two of formation is tilted leads the flank of tooth; In the waist of outer chain sheet, be provided with a convex portion in addition, this convex portion also has a crest line, and is extended to respectively by these crest line both sides between the abutment line of other side surface of this outer chain sheet, distinctly forms the flank of tooth of leading of an inclination.

The outer multi-speed bicycle chain that provides according to the utility model, wherein the crest line of inboard two convex portions of this inner chain sheet is the moving direction that is parallel to chain, and is positioned at the place, the nearly two edges of central authorities of waist.

The interior outer chain sheet of the outer speed changing bicycle special chain that provides according to the utility model, wherein the crest line of this outer chain sheet convex portion is the moving direction that is parallel to chain, and is positioned at the centre place of waist.

Fig. 1 is the External view of the utility model inner chain sheet.

Fig. 2 is the sectional view of 2-2 among Fig. 1.

Fig. 3 is the External view of the utility model outer chain sheet.

Fig. 4 is the sectional view of 4-4 among Fig. 3.

Fig. 5 is that illustration is implemented in combination of the present utility model.

Fig. 6 is the sectional view of 6-6 among Fig. 5.

Relativeness schematic sectional view when Fig. 7 is disengaging inner chain sheet axle center, tooth peak.

Fig. 8 be among Fig. 5 8-8 cut open figure.

See also Fig. 1 and Fig. 2, analyse and observe at the outward appearance of a visible chain inner chain sheet and 2-2 place, and the two ends of this inner chain sheet 1 respectively have a circular pin hole 13, around this pin-and-hole 13, extends upward a bulge loop 14, and the side that this has bulge loop 14 is the inboard of inner chain sheet 1.The edge of this inner chain sheet 1 intermediate portion inwardly concaves and forms a less circular arc waist 12.The place, the nearly two edges of waist 12 central authorities of this inner chain sheet 1 inboard, punching out convex portion 11, it respectively has a crest line 111 that is parallel to the chain movement direction, and this two crest line 111 extends dorsad respectively and is connected with the abutment line 15 of inner chain sheet 1 outer surface, and what form two joint inclinations leads the flank of tooth 112.

See also Fig. 3 and Fig. 4, analyse and observe at the outward appearance of a visible chain outer chain sheet and 4-4 place, and the two ends of this outer chain sheet 2 respectively have a circular pin hole 23, and the edge of intermediate portion inwardly concaves and forms a less circular arc waist 22.The centre place of the waist 22 of this inner chain sheet inboard, punching out one convex portion 21, it has a crest line 211 that is parallel to the chain movement direction, this crest line 211 to both sides extend and with outer chain sheet 2 in addition the abutment line 25 of side surface is connected, what form two inclinations leads the flank of tooth 212.

See also Fig. 5, it is that the crosscut that utilizes the utility model to combine behind the chain is analysed and observe, two inner chain sheets 1 make the inboard in the bulge loop 14 embedded chain rollers 3 relatively, it is relative with a side of its convex portion 21 to get a pair of outer chain sheet 2 again, make pin-and-hole 23 aim at the pin-and-hole 13 of inner chain sheet 1, then penetrate fixedly, promptly finish being connected of inner chain sheet 1 and outer chain sheet 2 with a chain pin 4.Method makes both sides inside and outside chain sheet correspondence be staggered by this, gives fixedly again, can finish a chain.

See also Fig. 6, it is the relativeness schematic representation of sprocket tooth peak 5 when 1 start of inner chain sheet, can find out that by this figure the convex portion 11 of inside piece 1 inboard has reduced the play at 5 at the inboard and tooth peak of inner chain sheet 1, when cyclery during through uneven road surface, even chain is swung by shake, its amplitude of oscillation of allowing but greatly reduces, and the noise that produces because of collision tooth peak 5 also reduces relatively.Because of leading the setting of the flank of tooth 112, under the situation that does not increase chain sheet spacing, increased the admissible space of tooth peak 5 with chain engages again, chain operation is smooth and easy when easily making the enforcement speed change, reduces the probability of taking off chain.Utilize again and lead cooperating of the flank of tooth 112 and convex portion 11, but the engaging position at automatic guiding chain and tooth peak makes it be positioned at the central position as far as possible, chain both sides unbalance stress when oneself can avoid the engaging position to be offset a side causes and shortens the situation in working life.Two parallel convex portions 11 are located at waist (indicate) central proximal edge place on the inner chain sheet 1, can make chain beat its axle center when getting over tooth peak 5 (ginseng Fig. 7), still can possess to reduce the function of play between the two, and then shorten the time that chain swings.Because aforementioned convex portion 11 has crest line 111, in the time of can't avoiding with 5 contact frictions of tooth peak as if chain, be to be the line contact but not the face friction, again from receiving the effect that reduces noise and loss.

See also Fig. 8, it is the relativeness schematic representation of sprocket tooth peak 5 when 2 starts of outer chain sheet, the convex portion 21 that can be found out outer chain sheet 2 inboards by this figure has really reduced the play of tooth peak 5 to outer chain sheet 2, and the setting of leading the flank of tooth 212 has also increased the admissible space of tooth peak 5 with chain engages, the design of crest line 211 makes tooth peak 5 and chain when unavoidable friction in addition, is the line contact but not the face contact.The effect of said structure all with aforementioned inner chain sheet 1 with, this section is repeated description no longer, unique different persons are that the convex portion 211 of outer chain sheet 2 only is a place, can't provide as inner chain sheet 1 axle center to surmount tooth peak 5, still can possess to reduce the function of play between the two.Yet, swing and to exert an influence greater than inner chain sheet 1 naturally it is beated because of the front and back of outer chain sheet 2 all have inner chain sheet 1 fixed with it.

Claims

1, a kind of outer multi-speed bicycle chain, it is characterized in that being provided with two convex portions in interior outer chain sheet inner side waist, this two convex portion has a crest line separately, and extended to dorsad between the abutment line of this inner chain sheet outer surface by this two crest line, two of formation is tilted leads the flank of tooth; In the waist of outer chain sheet, be provided with a convex portion in addition, this convex portion also has a crest line, and is extended to respectively by these crest line both sides between the abutment line of other side surface of this outer chain sheet, distinctly forms the flank of tooth of leading of an inclination.

2, outer multi-speed bicycle chain as claimed in claim 1 is characterized in that being the crest line of inboard two convex portions of this inner chain sheet the moving direction that is parallel to chain, and being positioned at the place, the nearly two edges of central authorities of waist.

3, outer multi-speed bicycle chain as claimed in claim 1 is characterized in that being the crest line of this outer chain sheet convex portion the moving direction that is parallel to chain, and being positioned at the centre place of waist.