CN2158011Y - Structure for external links joint and chain axle of chain - Google Patents

Abstract

The utility model relates to a structure of an outer chain sheet and a chain shaft of a chain. Convex labial edges are respectively arranged on the inner side surface and the outer side surface of the circumferential edges of two through holes of an outer chain sheet. The inner walls of the convex labial edges is same to the inner diameter of the through holes, and the axial lines of the outer chain sheet, the convex labial edges and the through holes are superposed; thus, an embrace edge surface with a large area is formed. When chain shafts are penetrated on the through holes of the outer chain sheet, the convex end parts of the chain shafts can be outwards extended to be covered on the convex labial edges on the outer side of the outer chain sheet, and the anti-stretching intensity of the circumferential edges of the through holes of the outer chain sheet is increased.

Description

Structure for external links joint and chain axle of chain

The utility model relates to the combination of chain outer chain sheet and chain rivet, refers in particular to chain outer chain sheet and the chain rivet combination that can promote tensile strength and stability.

The structure of chain roughly as shown in Figure 1 in the past, mainly be to assemble inner chain sheet 12 respectively at lining 11 two end part, in lining 11 outer periphery and be arranged with the chain that is folded in 12 of two inner chain sheets and roll 13, and in lining 11 central straight holes 111, wear chain rivet 14, chain rivet 14 2 ends all stretch out outside the inner chain sheet 12, and assemble outer chain sheet 15 respectively, and in order to promote the inlay resultant force of 14 of outer chain sheet 15 and chain rivets, impose riveted joint processing in place, chain rivet 14 outstanding end again, make its end to the expansion of outer chain sheet 15 perforation 151 peripheries; Though but chain 1 nationality was outwards expanded and enhancement inlay resultant force therebetween by chain rivet 14 ends in the past, flat because of outer chain sheet 15 outer side surfaces of chain 1, therefore when chain rivet 14 ends were outwards expanded, shortage can coat chimeric position, causes the inlay resultant force deficiency.

See also Fig. 2,3, it is the sectional view and the combination schematic representation of another kind of chain outer chain sheet in the past, major character be perforation 21 peripheries of outer chain sheet 2 from inside to outside punching press form antelabium 22, form floating convex 23 in antelabium 22 peripheries; When aforementioned outer chain sheet 2 is assembled on the chain 3, chain rivet 31 ends that are arranged in outer chain sheet 2 perforation 21 protrude in floating convex 23 tops equally, and nationality the punching press of chain rivet 31 ends, can make to pass body of rod position, to promote the inlay resultant force of 31 of outer chain sheet 2 and chain rivets to floating convex 23 periphery coatings, expansion.

Though the tensile strength that the outside relief of perforation periphery of outer chain sheet 2 can improve the not good shortage of chain inlay resultant force in the past and promote outer chain sheet 2 is not improved 31 stabilitys that combine of outer chain sheet 2 and chain rivet; Please comparison diagram 1,2, the chain 1 among Fig. 1 is that therefore, the obvolvent area more can make chain rivet 15 strong fixs by the obvolvent area between these outer chain sheet 15 perforation 151 internal diameters and chain rivet 14 bodies of rod about 14 of outer chain sheet 15 and chain rivets combine stability; Though 2 of the outer chain sheets that Fig. 2 improved have outwards outstanding antelabium 22, but the outer outstanding 21 inboard outer arcs that form that cause boring a hole of aforementioned antelabium 22 lack portion 24, the 21 internal diameter obvolvent edge faces 25 of just boring a hole do not increase because of the formation of antelabium 22, therefore, the two is in conjunction with back its outer chain sheet 2(15) and chain rivet 31(14) between the obvolvent area still about equally, obviously stability is not still improved; In addition, though the chain of Fig. 2 forms the antelabium 22 of projections and the tensile strength that can promote chain 3 at outer chain sheet 2, but because of the thickness of outer chain sheet 2 perforation 21 peripheries does not increase because of the formation of antelabium 22, therefore, when chain 3 is subjected to the external force drawing, its tensile strength that can promote is very limited, can't make assembling chain 3 more perfect.

Main purpose of the present utility model is to provide a kind of inlay resultant force that can not only increase between chain rivet and outer chain sheet, and more can have the chain outer chain sheet and the chain rivet combination of preferable stability and tensile strength.

Major character of the present utility model is: the perforation periphery of the perforation of outer chain sheet has antelabium outstanding to inside and outside hand hay cutter face respectively, the antelabium that wherein is positioned at the outside can be for chain shaft end expansion lining, and the inwall aperture of two antelabium is identical with punch inside diameter, and three's axis is overlaid and form obvolvent edge face more; Nationality obvolvent edge face can increase the obvolvent area of outer chain sheet and chain between centers, make the assembling chain keep inlay resultant force good in, more promote product in conjunction with stable and tensile strength.

Relevant the utility model is for reaching above-mentioned purpose, and technological means that is adopted and effect thereof are enumerated two preferred embodiments now, and cooperates that graphic details are as follows:

Graphic simple declaration:

Fig. 1 is a kind of built-up section sectional view of chain in the past.

Fig. 2 is the sectional view of outer chain sheet in the past in another.

Fig. 3 is Fig. 2 chain assembled sectional view.

Fig. 4 is the outer chain sheet sectional view of this practicality with a novel preferred embodiment.

Fig. 5 is the assembled sectional view of the utility model Fig. 4 preferred embodiment.

Fig. 6 is the assembled sectional view of another preferred embodiment of the utility model.

See also Fig. 4, the outer chain sheet 4 of present embodiment have equally two directly to perforation 41, be primarily characterized in that: the outstanding respectively inside and outside sidewall of 41 inside and outside two sides of boring a hole is the inside and outside antelabium 42,43 of vertical configuration, the internal diameter of above-mentioned inside and outside antelabium 42,43 is identical with perforation 41 internal diameters, and its axis is more overlapped and form the long-pending bigger obvolvent edge face 44 of an anchor ring.

Please cooperate Fig. 5, when aforementioned outer chain sheet 4 was assembled on the chain 5, the outer lip 43 of outer chain sheet 4 outside reliefs can be covered when chamfer machining for assembling chain rivet 51 ends equally, to keep the inlay resultant force of 4 of chain rivet 51 and outer chain sheets; And by inside and outside antelabium 42,43 inwalls and the obvolvent edge face 44 formed of perforation 41 inwalls, then can be with the large size inclusion at chain rivet 51 body of rod peripheries, promoting obvolvent area therebetween, and the stability after increasing it and assembling; Certainly, aforementioned outstanding inside and outside antelabium 42,43 also can make outer chain sheet 4 perforation 41 peripheries not subject to the effect of external force and ruptures, to promote the tensile strength of product.

In order to reach aforementioned creation purpose, the utility model also can be as shown in Figure 6, make the outstanding respectively inside and outside antelabium 61,62 of inside and outside sidewall of outer chain sheet 6 equally, the internal diameter of above-mentioned inside and outside antelabium 61,62 is same identical with perforation 63 internal diameters of outer chain sheet 6, and three's axis is also overlapped; They are different with previous embodiment be in: the outer wall of inboard lip 61 is shrink gradually coniform.

By above explanation as can be known, the utility model forms the antelabium of outside relief respectively in the inside and outside side of the perforation of outer chain sheet, and make the internal diameter of these antelabium identical with punch inside diameter, and its axis is overlapped, so, can when possessing inlay resultant force, further promote the obvolvent area between chain rivet and outer chain sheet, with the stability after the enhancement combination; Certainly, the inside and outside antelabium of aforementioned evagination also can significantly be strengthened the intensity of outer chain sheet periphery, makes the assembling chain when being subjected to the external force drawing, can produce bigger tensile strength.

Contract the above, the improvement of the above-mentioned structure of the utility model is not only novel, and " stability " that more can promote chain reaches " tensile strength ", so really be the practical design that improves.

Claims (1)

1, a kind of chain outer chain sheet and chain reel structure is characterized in that: be formed with on the plate body of outer chain sheet two for chain rivets stretch through directly to perforation, the perforation periphery inwardly, the outstanding respectively inside and outside antelabium of outer side surface; Outer lip, lining chimeric by the chain shaft end of assembling chain, and the internal diameter of inside and outside antelabium more the internal diameter with perforation is identical, and its axis overlaid and form obvolvent edge face.

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