CN2123654U

CN2123654U - Outer chain slice of chain

Info

Publication number: CN2123654U
Application number: CN 92207642
Authority: CN
Inventors: 吴盈进
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-22
Filing date: 1992-04-22
Publication date: 1992-12-02

Abstract

The utility model relates to an outer chain slice of a chain; the left and the right sides of the outer chain slice are respectively formed with straight through holes; an inwardly concave face is formed between the through holes and is close to the inner side face; the concave face and the through holes at both sides are respectively provided with inclined planes; the front and the back ends of the concave face are respectively formed with a guiding incline. When the outer chain slice provided by the utility model is assembled on the chain, the width between two outer chain slices of the chain is increased because of the forming of the concave face, which is beneficial to a jogged chain wheel to be led in, and the chain wheel is easily led in between the outer chain slices because of the forming of the guiding incline, so the advantages of smooth speed changing and low noise can be obtained.

Description

Outer chain slice of chain

The utility model relates to a kind of outer chain sheet, and novel, the suitable speed-changing chain of particularly a kind of structure uses, and has the outer chain sheet of the chain that speed change is smooth and easy, noise content is low.

Outer chain sheet is the strength member that the bicycle chain transmission is used, variation along with the bicycle function, the structure of above-mentioned outer chain sheet is the whether smooth and easy important key of chain transmission especially, for example: present common speed changing bicycle, the outer chain sheet of being installed on the chain of its use is if in the past during the planar of chain, when the speed change of chain, will be easy to rub mutually with sprocket wheel, cause the generation of friction noise, and reduce the smooth degree of speed change, in order to improve above-mentioned shortcoming, the chain of being developed is improved at the reason that its speed change has some setbacks invariably in recent years, and the means of its improvement are to enlarge space between two outer chain sheets or the inner chain sheet (the utility model is improved at the structure of outer chain sheet, therefore, below explanation is based on outer chain sheet), snap in the sprocket that makes things convenient for sprocket wheel, chimeric, and the mode of its improvement can be divided into two kinds substantially, the first forms tilted guide surface at the inboard periphery of outer chain sheet, and the sprocket that is beneficial to sprocket wheel slips into; Another kind of mode is to make the outside relief of a bit of plate body, to increase by two width between the chain sheet; Main emphasis of the present utility model is that the outer chain sheet of another kind of novel structure is being provided, and makes outer chain sheet when being assembled in chain, can increase the smooth degree of chain speed change.

At first, seeing also shown in Figure 1ly, is the sectional view of outer chain sheet in the past, mainly is to wear two inner chain sheets 12, chains to roll 13 and two outer chain sheets 14 on chain rivet 11 external diameters, the outward-dipping tilted guide surface 121 that is formed with in inner chain sheet 12 median plate body positions, the sprocket that is beneficial to sprocket wheel embeds; And the structure of outer chain sheet 14 mainly is to form two perforation 141 on plate body, and the outside punching press of 141 central positions of above-mentioned perforation forms protuberance 142, is formed with tilted guide surface 143 respectively in protuberance 142 inboards; When above-mentioned chain 1 when carrying out the speed change start, by the formation of above-mentioned protuberance 142, can make that 14 width of two outer chain sheets increase, so just can make the sprocket of sprocket wheel to be easier to import between two outer chain sheets 14, reach speed change purpose smoothly.

In the past through the outside relief of central position between two perforation of outer chain sheet, though can promote the smooth degree of chain speed change, and in order to achieve the above object, its feasible alternate embodiment is very various; The utility model is improved at the outer chain sheet of chain, and speed change is smooth and easy so that the utility model through the improvement of structure, can reach equally, the low advantage of friction noise amount, to be fit to the use of speed changing bicycle.

Main purpose of the present utility model is to provide a kind of when being assembled in chain, can promote the smooth degree of chain speed change, and the outer chain sheet that reduces the chain of chain friction noise.

Major character of the present utility model is: have on the plate body of outer chain sheet two directly to perforation, central position outwards has been recessed to form concave face between above-mentioned perforation, formation through above-mentioned concave face, can increase the width of two outer chain sheets, make chain have the advantage that speed change is smooth and easy, the friction noise amount is low by the utility model assembling.

That is to say, the utility model proposes a kind of outer chain sheet of chain, the left and right two ends of described outer chain sheet be formed with respectively directly to perforation; It is characterized in that: the outer chain sheet central position inboard between perforation is formed with the outer chain sheet depression in the surface portion that is parallel to the outer chain sheet sunken inside.

The inside curved arc in the forward and backward both sides of depressed part is formed with tilted guide surface.

The thickness of outer chain sheet is 1.2mm.

Technological means is for achieving the above object now enumerated preferred embodiment and conjunction with figs., and after being described in detail in, wherein accompanying drawing is respectively:

Fig. 1 is the assembled sectional view of outer chain sheet in the past;

Fig. 2 is the utility model embodiment's a stereogram of bottom view;

Fig. 3 is the 3-3 line sectional view of Fig. 2;

Fig. 4 is the utility model embodiment's a assembled sectional view;

Fig. 5 is the utility model embodiment and comparison schematic representation in the past.

At first, see also 2,3 figure, the outer chain sheet that the utility model proposes mainly is that the thickness of outer chain sheet 2 is increased to 1.2mm by 1mm originally, above-mentioned outer chain sheet 2 left and right two ends form respectively directly to perforation 21, form horizontal plane of inclination 22 respectively at 21 inside lines of perforation, above-mentioned two plane of inclination 22 root edges extend to central authorities again, are parallel to plate body depression in the surface face 23 and form; In addition, the forward and backward side that is positioned at concave face 23 forms the tapered tilted guide surface 24 to plate body central authorities more respectively; Just, if outer chain sheet 2 is watched by the base side view, its concave face 23 is positioned at the central position of plate body inboard, and is parallel to the surface of outer chain sheet 2, and two tilted guide surfaces 24 then lay respectively at the forward and backward both sides of plate body central position inboard.

Please cooperate Fig. 4, when the outer chain sheet that the utility model proposes was assembled on the chain 4, two perforation 21 of outer chain sheet 2 were articulated in chain rivet 41 both sides of chain 4 equally, and at this moment, the concave face 23 on the outer chain sheet 2 is relatively set up, and is positioned at the inner side surface of chain 4; The distance of supposing 2 of two outer chain sheets is B, if during the width C of 23 of two concave faces, then B is less than C.

Please still consult Fig. 4, when the chain 4 of assembling outer chain sheet of the present utility model is expert at the speed change start, chain 4 can be by drawing and oblique striding on the sprocket wheel of being located at two different axis, at this moment, through the formation of above-mentioned concave face 23, not only in time enlarged the width of 2 of two outer chain sheets, also make the sprocket of sprocket wheel more successfully inwardly to slip into along tilted guide surface 24, slip into two outer chain sheet 2(or two inner chain sheets up to sprocket) between till, to finish speed change effect smoothly.

Additional disclosure weakens the intensity of plate body for fear of the formation of depressed part 23, the thickness of its outer chain sheet 2 chain sheet approximately more in the past increases 0.2mm, and increases to 1.2mm by 1mm originally.

By above explanation as can be known, the outer chain sheet that the utility model proposes is that the plate body with outer chain sheet thickens 0.2mm, again in its inboard concave face that is parallel to plate body that forms, really can increase the width of two outer chain sheet central positions, see also comparison diagram shown in Figure 5, wherein numbering 7 and 6 is outer chain sheets of chain in the past, is the outer chain sheets that the utility model proposes and number 2; By above-mentioned comparison diagram as can be known, though the outer chain sheet that the utility model proposes has increased the thickness of plate body, but at the inboard depressed part that forms of plate body, really can enlarge the width of two outer chain sheet central positions, and then make the sprocket of sprocket wheel be easier to engage between two outer chain sheets, therefore, above-mentioned outer chain sheet is compared with the outer chain sheet of chain in the past, has the effect that speed change is smooth and easy, reduce the speed change noise really; And if with outer chain sheet in the past shown in Figure 1 relatively, though the effect that both reached is identical, but because both structures and inequality, and the plate body thickness that increases outer chain sheet can be strengthened the intensity of outer chain sheet, the structure that also can cooperate other members on the chain, and the effect of promoting the assembling chain, for example: can be in perforation periphery outer side surface forms a ring inner concave, so, just can be in conjunction with the downward punching press in chain rivet two ends, make the chain rivet two ends submerge in the concave surface, protrude in the outer width of chain to reduce chain rivet, and then reduce the transmission noise of chain.

In sum, at the inboard concave face that forms indent of outer chain sheet, can increase the smooth degree of assembling rear chain when speed change really, and reach the purpose that reduces friction noise.

Claims

1, a kind of outer chain sheet of chain, the left and right two ends of described outer chain sheet be formed with respectively directly to perforation; It is characterized in that: the outer chain sheet central position inboard between perforation is formed with the outer chain sheet depression in the surface portion that is parallel to the outer chain sheet sunken inside.

2, according to the outer chain sheet of the described chain of claim 1, it is characterized in that: the inside curved arc in the forward and backward both sides of depressed part is formed with tilted guide surface.

3, according to the outer chain sheet of the described chain of claim 1, it is characterized in that: the thickness of outer chain sheet is 1.2mm.