CN209856309U - Outer link plate and roller chain - Google Patents

Abstract

The application discloses an outer chain plate and a roller chain, wherein the outer chain plate comprises a first end part, a second end part and a first middle part, the first end part and the second end part are connected through the first middle part, and the first end part and the second end part are in the shape of a rounded rhombus; the roller chain comprises a plurality of roller chain monomers, the roller chain monomers comprise a pin shaft, rollers, two inner chain plates and two outer chain plates, second through holes are formed in the left ends and the right ends of the inner chain plates and the outer chain plates, the middle of the pin shaft is sleeved with the inner chain plates, the upper ends and the lower ends of the pin shaft are respectively sleeved with the two inner chain plates through the second through holes, bosses extend towards the roller direction in the second through holes of the two inner chain plates, the bosses are inserted into gaps between the rollers and the pin shaft, the two outer chain plates are sleeved on two pin shafts on the two adjacent roller chain monomers through the second through holes, and the outer chain plates are located on the outer sides of the inner chain. The utility model provides an outer link joint and roller chain, torsion resistance is strong, and wear resistance and fatigue resistance can be excellent.

Description

Outer link plate and roller chain

Technical Field

The utility model relates to a transmission component technical field especially relates to an outer link joint and roller chain.

Background

Roller chains are a type of power chain used in conveyor machines, and are a type of chain drive used in a wide variety of domestic, industrial and agricultural machines, including conveyors, plotters, printing presses, automobiles, motorcycles, and bicycles. It is a simple, reliable and high-efficiency power transmission device, and is driven by a gear called chain wheel and connected together by a series of short cylindrical roller chains.

Referring to fig. 1, an outer link plate 100 of a conventional roller chain includes a first end portion 101 and a second end portion 102, the first end portion 101 and the second end portion 102 are circular, and a force analysis is performed on an end portion of the outer link plate 100 by a finite element method, as shown in fig. 2, in the drawing, a minimum equivalent stress MN is 57.155Pa, and a maximum equivalent stress MX is 4367Pa, so that a stress value of an edge of the first end portion 101 and the second end portion 102 is 57.155 Pa. Therefore, when the roller chain moves, the end of the outer link plate 100 is usually required to bear a large force, which may cause abrasion or deformation of the outer link plate 100, thereby affecting the wear resistance and fatigue resistance of the roller chain.

SUMMERY OF THE UTILITY MODEL

The utility model provides an above-mentioned problem, provides an outer link joint and roller chain, and torsion resistance is strong, and wear resistance and fatigue resistance can be excellent.

The utility model adopts the following technical scheme: the utility model provides an outer chain plate, including first end portion, second end portion and first mid portion, first end portion with the second end portion passes through first mid portion is connected, first end portion with the shape of second end portion is the fillet rhombus.

In an embodiment of the present invention, the rounded corners of the first end portion and the second end portion are equal in size.

In an embodiment of the present invention, the first middle portion is provided with a first through hole, and the first through hole is rectangular, rounded rectangular, kidney-shaped, oval or circular.

The utility model also provides a roller chain, including several roller chain monomer, several roller chain monomer end to end connection in proper order forms annular roller chain, roller chain monomer is including round pin axle, roller, two inner plates and two foretell outer plates, the inner plate with both ends all are equipped with the second through-hole about the outer plate, the roller is hollow structure, and gapped ground cover is located the middle part of round pin axle, two the inner plate overlaps respectively through the second through-hole and is located the upper and lower both ends of round pin axle, two the second through-hole department of inner plate has the boss towards roller direction extension, the boss is inserted and is located the roller with in the clearance between the round pin axle, two outer plates locate two on two adjacent roller chain monomers through the second through-hole cover sell epaxial, just outer plates are located the inner plate outside.

In an embodiment of the present invention, the height of the boss is less than or equal to half of the height of the roller.

In an embodiment of the present invention, the outer chain plate is in interference fit with the pin shaft, and the inner chain plate is in clearance fit with the pin shaft and the inner chain plate is in clearance fit with the roller.

In an embodiment of the present invention, the size of the inner chain plate is larger than or equal to the size of the outer chain plate; the thickness of the inner chain plate is larger than or equal to that of the outer chain plate.

In an embodiment of the present invention, the inner link plate and the outer link plate are made of carbon alloy steel.

In an embodiment of the present invention, the inner link plate includes a third end portion, a fourth end portion and a second middle portion, the first end portion and the second end portion are connected by the second middle portion, and the first end portion and the second end portion are circular in shape.

The utility model has the advantages that: the utility model provides an outer link joint and roller chain, because the first end of outer link joint is the fillet rhombus with the shape of second end, carry out the atress analysis through the finite element method to the tip of outer link joint and know, please refer to fig. 4 and show, minimum equivalent stress MN is 7.865Pa in the picture, maximum equivalent stress MX is 4377Pa, therefore, the stress value at the edge of first end and second end is 7.865Pa, will be little when being circular than the shape of first end and second end, consequently, the edge of outer link joint is difficult for taking place deformation and wearing and tearing, and then the torsion resistance of roller chain, wear resistance and fatigue resistance can have been improved.

Drawings

FIG. 1 is a schematic structural view of a conventional outer link plate;

FIG. 2 is a force analysis diagram of a conventional outer link plate;

FIG. 3 is a schematic structural view of the outer link plate of the present invention;

FIG. 4 is a force analysis diagram of the outer link plate of the present invention;

FIG. 5 is a schematic view of the roller chain of the present invention;

FIG. 6 is a schematic cross-sectional view of the roller chain of the present invention;

FIG. 7 is a schematic structural view of the inner link plate of the present invention;

fig. 8 is a schematic cross-sectional view of the inner link plate of the present invention.

The figures are numbered: 1. an outer link plate; 2. a pin shaft; 3. a roller; 4. an inner link plate; 5. a second through hole; 11. a first end portion; 12. a second end portion; 13. a first intermediate portion; 41. a boss; 42. a third end portion; 43. a fourth end portion; 44. a second intermediate portion; 131. a first through hole; 441. a third through hole; 100. an outer link plate; 101. a first end portion; 102. a second end portion.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.

Referring to fig. 3, the present invention provides an outer link plate 1, which includes a first end portion 11, a second end portion 12 and a first middle portion 13, wherein the first end portion 11 and the second end portion 12 are connected by the first middle portion 13, and the first end portion 11 and the second end portion 12 are in the shape of a rounded diamond. As the first end portion 11 and the second end portion 12 of the outer link plate 1 are in the shape of rounded rhombuses, and the stress analysis of the ends of the outer link plate 1 is performed by the finite element method, please refer to fig. 4, in which the minimum equivalent stress MN is 7.865Pa and the maximum equivalent stress MX is 4377Pa, so that the stress value of the edges of the first end portion and the second end portion is 7.865Pa, and therefore, the stress value of the edges of the first end portion 11 and the second end portion 12 is 7.865Pa, which is smaller than that when the first end portion 11 and the second end portion 12 are in the shape of circles, and thus the edges of the outer link plate 1 are not easily deformed and worn.

The rounded corners of the first end portion 11 and the second end portion 12 are all equal in size, such that the geometric centers of the first end portion 11 and the second end portion 12 are equidistant from the rounded corners.

The first middle portion 13 is provided with a first through hole 131, and the shape of the first through hole 131 is rectangular, rounded rectangular, kidney-shaped, oval or circular. The outer link plate 1 is provided with the first through hole 131, so that the self weight of the roller chain can be reduced, and meanwhile, the self weight of the roller chain can be reduced, and the abrasion of the roller chain can be reduced.

Referring to fig. 3-8, the present invention further provides a roller chain, comprising a plurality of roller chain units, wherein the plurality of roller chain units are sequentially connected end to form a circular roller chain, the roller chain units comprise a pin shaft 2, rollers 3, two inner chain plates 4 and two outer chain plates 1, the left and right ends of the inner chain plates 4 and the outer chain plates 1 are respectively provided with a second through hole 5, the rollers 3 are hollow structures and are sleeved in the middle of the pin shaft 2 with gaps, the two inner chain plates 4 are respectively sleeved on the upper and lower ends of the pin shaft 2 through the second through holes 5, the second through holes 5 of the two inner chain plates 4 extend towards the rollers 3 to form a boss 41, the boss 41 is inserted into the gap between the rollers 3 and the pin shaft 2, two outer chain plates 1 are sleeved on two pin shafts 2 on two adjacent roller chain single bodies through second through holes 5, and the outer chain plates 1 are positioned on the outer side of the inner chain plates 4. The first end part 11 and the second end part 12 of the outer chain plate 1 are in the shape of a rounded rhombus, and the edge of the outer chain plate 1 is not easy to deform and wear, so that the torsion resistance, the wear resistance and the fatigue resistance of the roller chain are improved. The gap between the roller 3 and the pin shaft 2 is matched and connected with the boss 41 on the inner chain plate 4, so that a sleeve in the existing roller chain is omitted, the self weight of the roller chain is reduced, the processing procedures are reduced, and materials are saved; the boss 41 is formed by extending the inner link plate 4, so that the tensile strength and the impact strength of the inner link plate 4 are improved, the wear resistance of the roller chain is improved, and the service life of the roller chain is prolonged.

The height of the bosses 41 is less than or equal to half the height of the rollers 3 so that the inner link plates 4 respectively located at both ends of the rollers 3 do not interfere with each other when the rotation occurs.

The outer chain plate 1 and the pin shaft 2 are in interference fit, and the inner chain plate 4 and the pin shaft 2 and the inner chain plate 4 and the roller 3 are in clearance fit, so that when the inner chain plate 4 and the outer chain plate 1 are relatively bent, the inner chain plate 4 and the roller 3 can freely rotate around the pin shaft 2.

The size of the inner chain plate 4 is larger than or equal to that of the outer chain plate 1; the thickness of the inner chain plate 4 is larger than or equal to that of the outer chain plate 1. When the roller chain is in transmission, the load borne by the inner chain plate 4 is usually larger than that of the outer chain plate 1, so that the load bearing capacity of the roller chain can be improved by improving the sizes and the thicknesses of the inner chain plate 4 and the outer chain plate 1, and the roller chain can be suitable for occasions with complicated working conditions.

The inner chain plate 4 and the outer chain plate 1 are both made of carbon alloy steel, so that the tensile strength and the impact strength of the chain plates are improved.

Referring to fig. 7, the inner link plate 4 includes a third end portion 42, a fourth end portion 43, and a second middle portion 44, the first end portion 11 and the second end portion 12 are connected by the second middle portion 44, and the first end portion 11 and the second end portion 12 are circular in shape.

The second intermediate portion 44 is provided with a third through hole 441, and the shape of the third through hole 441 is rectangular, rounded rectangular, kidney-shaped, oval, or circular. The inner link plate 4 is provided with the third through hole 441 to reduce the self weight of the inner link plate 4 and the self weight of the roller chain at the same time, and thus, the abrasion of the roller chain can be reduced. And the inner chain plate 4 and the outer chain plate 1 are both provided with through hole structures, so that slurry adhered to the roller chain and the chain wheel in the meshing process of the roller chain and the chain wheel can be conveniently discharged.

The above is only the preferred embodiment of the present invention, and not the patent protection scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings of the present invention can be directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims (10)

1. An outer link plate comprising a first end portion, a second end portion and a first intermediate portion, said first end portion and said second end portion being connected by said first intermediate portion, said first end portion and said second end portion being shaped as a rounded diamond.

2. The outer link plate of claim 1 wherein the radii of said first end portion and said second end portion are all equal in size.

3. The outer link plate of claim 1 wherein said first intermediate portion is provided with a first through hole having a rectangular, rounded rectangular, kidney, oval or circular shape.

4. A roller chain is characterized by comprising a plurality of roller chain monomers which are sequentially connected end to form an annular roller chain, the roller chain unit comprises a pin shaft, a roller, two inner chain plates and two outer chain plates according to any one of claims 1 to 3, the left and right ends of the inner chain plates and the outer chain plates are respectively provided with a second through hole, the rollers are of a hollow structure and are sleeved in the middle of the pin shaft with gaps, the two inner chain plates are respectively sleeved at the upper end and the lower end of the pin shaft through the second through holes, bosses extend towards the roller direction from the second through holes of the two inner chain plates, the lug bosses are inserted into gaps between the rollers and the pin shafts, the two outer chain plates are sleeved on the two pin shafts on the two adjacent roller chain single bodies through the second through holes, and the outer chain plates are positioned on the outer sides of the inner chain plates.

5. The roller chain of claim 4, wherein the height of the boss is less than or equal to half the roller height.

6. The roller chain of claim 4, wherein the outer link plates are in interference fit with the pin shafts, and the inner link plates are in clearance fit with the pin shafts and the rollers.

7. The roller chain of claim 4, wherein the inner link plate is greater than or equal in size to the outer link plate; the thickness of the inner chain plate is larger than or equal to that of the outer chain plate.

8. The roller chain of claim 4, wherein the inner link plate and the outer link plate are each made of a carbon alloy steel.

9. The roller chain of claim 4, wherein the inner link plate includes a third end portion, a fourth end portion, and a second intermediate portion, the first end portion and the second end portion being connected by the second intermediate portion, the first end portion and the second end portion being circular in shape.

10. The roller chain of claim 9, wherein the second intermediate portion is provided with a third through hole having a rectangular, rounded rectangular, kidney-shaped, oval or circular shape.