A profiled roller chain

Abstract

The application discloses a special-shaped roller chain, which comprises inner chain plates, outer chain plates and pin shafts connecting the inner chain plates and the outer chain plates, two inner shaft holes arranged in front and back on the inner chain plates are all installed in gap cooperation with the pin shafts, two outer shaft holes arranged in front and back on the outer chain plates are all installed in interference fit with the pin shafts, a limiting plate is installed on the pin shaft outside the inner chain plate, an annular convex ridge is arranged on the inner side surface of the limiting plate, the annular convex ridge of the limiting plate is clamped in the gap between the inner shaft hole of the inner chain plate and the pin shaft, and the pin shaft between the adjacent inner chain plate and the outer chain plate is provided with an elastic assembly. The special-shaped roller chain is compact in structure, can not only ensure the stability and firmness of the whole roller chain link connection, but also can make the inner chain plate deflect at a certain angle with the outer chain plate at the chain link, reduce the risk of high resistance, high noise and easy damage caused by the stress bending of the chain link in the limiting direction, is safe and reliable, improves the transmission efficiency and is convenient to use.

Description

Technical Field

[0001] This invention relates to the field of chain technology, specifically to a non-standard roller chain. Background Technology

[0002] A roller chain is a type of chain drive used for transmitting mechanical power. It is widely used in household, industrial, and agricultural machinery, including conveyors, plotters, printing presses, automobiles, motorcycles, and bicycles. It consists of a series of short cylindrical rollers linked together and driven by a gear called a sprocket. It is a simple, reliable, and efficient power transmission device.

[0003] Currently, conventional roller chains can only bend freely in one direction through their links. In the opposite direction, they are structurally restricted and fixed with no room for movement. Therefore, they are easily damaged when subjected to force in the limiting direction. For example, when changing speeds on a variable-speed bicycle, the chain drive is smoothest when the front and rear gears are in a straight line. The greater the misalignment between the front and rear gears, the greater the chain's running resistance and noise, and the more prone it is to damage, thus affecting transmission efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a non-circular roller chain to solve the above-mentioned defects.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A non-standard roller chain includes an inner chain plate, an outer chain plate, and a pin connecting the inner chain plate and the outer chain plate. Two inner shaft holes on the inner chain plate are clearance-fitted with the pin. Two outer shaft holes on the outer chain plate are interference-fitted with the pin. A limiting plate is installed on the pin on the outer side of the inner chain plate. An annular raised ridge is provided on the inner side of the limiting plate, and the annular raised ridge engages within the gap between the inner shaft hole of the inner chain plate and the pin. Elastic components are provided on the pins between adjacent inner and outer chain plates.

[0007] Preferably, the elastic component is a spherical or ellipsoidal structure, and includes an upper hemispherical shell, a lower hemispherical shell, and a middle partition. The middle partition is installed between the upper and lower hemispherical shells. The interior of the upper and lower hemispherical shells is filled with a high-elastic rubber layer. A component through hole in a straight line is provided at the center of the upper hemispherical shell, the lower hemispherical shell, and the middle partition. The pin passes through the component through hole of the elastic component.

[0008] Preferably, the upper hemispherical shell, the lower hemispherical shell, and the middle partition are all made of elastic steel plate.

[0009] Preferably, a sleeve and a roller are provided on the pin between the two inner chain plates, the sleeve being fitted onto the pin and the roller being fitted onto the sleeve.

[0010] Preferably, an annular limiting protrusion is provided on the inner wall of the inner shaft hole of the inner chain plate, one end of the sleeve is engaged in the inner shaft hole of the inner chain plate inside the annular limiting protrusion, and the annular protruding ridge of the limiting plate is engaged in the inner shaft hole of the inner chain plate outside the annular limiting protrusion.

[0011] Preferably, the annular raised ridge on the inner side of the limiting plate is composed of a tubular raised member and an annular inclined member; the inner and outer walls of the tubular raised member are perpendicular to the inner side of the limiting plate, and the annular inclined member is fitted at the junction of the outer wall of the tubular raised member and the inner side of the limiting plate. The annular inclined member is an annular structure with a right-angled triangular cross-section, its inner wall is perpendicular to the inner side of the limiting plate and fits against the outer wall of the tubular raised member, and the outer wall of the annular inclined member forms a certain angle with the inner side of the limiting plate and is inclined.

[0012] Preferably, the limiting plate, the annular raised ridge, and the annular inclined member are integrally molded.

[0013] Preferably, the height of the annular inclined member is lower than the height of the annular protruding ridge, and the outer diameter of the bottom of the annular inclined member is not greater than the outer diameter of the limiting plate.

[0014] Preferably, the inner end face of the annular limiting protrusion is perpendicular to the inner wall of the inner shaft hole of the inner chain plate, and the outer end face of the annular limiting protrusion forms a certain angle with the inner wall of the inner shaft hole of the inner chain plate and is inclined.

[0015] Preferably, the width of the inclined outer end face of the annular limiting protrusion is smaller than the width of the inclined outer wall of the annular inclined member.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention relates to a non-circular roller chain with a compact structure. By installing a limiting plate on the pin on the outer side of the inner chain plate, and an elastic component installed on the outer side of the limiting plate, the annular protrusion on the inner side of the limiting plate can be engaged with the gap between the inner shaft hole of the inner chain plate and the pin under the action of the elastic component. This not only ensures the stability and firmness of the entire roller chain link connection, but also allows the inner chain plate to deflect at a certain angle with the outer chain plate at the chain link, reducing the risk of high running resistance, high noise, and easy damage caused by the chain link bending under force in its limiting direction. It is safe, reliable, improves transmission efficiency, and is easy to use. Attached Figure Description

[0018] Figure 1 : Schematic diagram of the structure of the present invention;

[0019] Figure 2: Schematic diagram of the structure at the link of the irregular roller chain of the present invention;

[0020] Figure 3 : A schematic diagram of the structure of the limiting plate of the irregular roller chain of the present invention. Detailed Implementation

[0021] Combined with appendix Figure 1-3 The specific embodiments of the present invention are described below:

[0022] like Figure 1-3 As shown, a non-standard roller chain includes an inner chain plate 1, an outer chain plate 2, and a pin 5 connecting the inner chain plate 1 and the outer chain plate 2. The two inner chain plates 1 and the two outer chain plates 2 are symmetrically mounted on the pin 5, and the rear ends of the inner chain plates 1 and the front ends of the outer chain plates 2, as well as the rear ends of the outer chain plates 2 and the front ends of the inner chain plates 1, are connected by the pin 5, thus forming a series-connected roller chain. A sleeve 3 and a roller 4 are respectively provided on the pin 5 between the two inner chain plates 1; the sleeve 3 fits onto the pin 5, and the roller 4 fits onto the sleeve 3.

[0023] The two outer shaft holes on the outer link plate 2 are both interference-fitted with the pin 5, and the two inner shaft holes on the inner link plate 1 are both clearance-fitted with the pin 5. A limiting plate 6 is installed on the pin 5 on the outer side of the inner link plate 1. The inner side of the limiting plate 6 is provided with an annular protrusion ridge, which engages in the gap between the inner shaft hole of the inner link plate 1 and the pin 5.

[0024] An annular limiting protrusion is provided on the inner wall of the inner shaft hole of the inner chain plate 1. One end of the sleeve 3 is engaged in the inner shaft hole of the inner chain plate 1 inside the annular limiting protrusion, and the annular protrusion ridge of the limiting plate 6 is engaged in the inner shaft hole of the inner chain plate 1 outside the annular limiting protrusion.

[0025] The annular raised ridge on the inner side of the limiting plate 6 is composed of a tubular raised part 61 and an annular inclined part 62. The limiting plate 6, the annular raised ridge and the annular inclined part are integrally molded.

[0026] The tubular protrusion 61 has both its inner and outer walls perpendicular to the inner surface of the limiting plate 6. The annular inclined member 62 is fitted onto the junction of the outer wall of the tubular protrusion 61 and the inner surface of the limiting plate 6. The annular inclined member 62 is a ring-shaped structure with a right-angled triangular cross-section. Its inner wall is perpendicular to the inner surface of the limiting plate 6 and fits against the outer wall of the tubular protrusion 61. The outer wall of the annular inclined member 62 forms a certain angle with the inner surface of the limiting plate 6 and is inclined. The inner end face of the annular limiting protrusion is perpendicular to the inner wall of the inner shaft hole of the inner chain plate 1, and the outer end face of the annular limiting protrusion forms a certain angle with the inner wall of the inner shaft hole of the inner chain plate 1 and is inclined.

[0027] The height of the annular inclined member 62 is lower than the height of the annular protrusion ridge, and the outer diameter of the bottom of the annular inclined member is not greater than the outer diameter of the limiting plate 6. The width of the inclined outer end face of the annular limiting protrusion is less than the width of the inclined outer wall of the annular inclined member.

[0028] Elastic components 7 are provided on the pins 5 between adjacent inner chain plates 1 and outer chain plates 2. Each elastic component 7 is spherical or ellipsoidal in shape and includes an upper hemispherical shell 71, a lower hemispherical shell 72, and a middle partition 73. The middle partition 73 is installed between the upper and lower hemispherical shells 71 and 72. Both the upper and lower hemispherical shells 71 and 72 are filled with a high-elasticity rubber layer 74. A straight through-hole is provided at the center of each of the upper and lower hemispherical shells 71 and 72, and the pin 5 passes through this through-hole. The upper and lower hemispherical shells 71 and 72, as well as the middle partition 73, are all made of elastic steel plates, allowing them to deform under external stress.

[0029] In this invention, when the irregular roller chain is subjected to force in the limiting direction, the inner chain plate 1 at the chain link deflects and forms a certain angle with the outer chain plate 2. During this process, the limiting plate 6 is squeezed outward by the inner chain plate 1, and the outwardly offset limiting plate 6 will squeeze the elastic component 7. The elastic component 7, which has a spherical or elliptical structure, deforms under the pressure of external force and gradually flattens. When the roller chain is no longer subjected to force in its limiting direction, the inner chain plate 1 and the outer chain plate 2 at the chain link return to a parallel state. At this time, the elastic component 7 recovers its deformation, and the annular inclined member 62 of the limiting plate 6 squeezes the inclined outer end face of the annular limiting protrusion in the inner shaft hole of the inner chain plate 1 and engages the annular protrusion ridge of the limiting plate 6 into the gap between the inner shaft hole of the inner chain plate 1 and the pin 5, thereby achieving the stability of the installation and fixation of the inner chain plate 1 and the pin 5.

[0030] This invention relates to a special-shaped roller chain. By installing a limiting plate 6 on the pin 5 on the outer side of the inner chain plate 1, and an elastic component 7 on the outer side of the limiting plate 6, the annular protrusion ridge on the inner side of the limiting plate 6 can be engaged with the gap between the inner shaft hole of the inner chain plate 1 and the pin 5 under the action of the elastic component 7. This not only ensures the stability and firmness of the entire roller chain link connection, but also allows the inner chain plate 1 to deflect at a certain angle with the outer chain plate 2 at the chain link. This reduces the risk of high running resistance, high noise, and easy damage caused by the chain link bending under force in its limiting direction. It is safe, reliable, improves transmission efficiency, and is easy to use.

[0031] The invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the invention, or the direct application of the inventive concept and technical solution to other situations without modification, is within the protection scope of the invention.

Claims

1. A non-standard roller chain, comprising an inner chain plate (1), an outer chain plate (2), and a pin (5) connecting the inner chain plate (1) and the outer chain plate (2), characterized in that, The two inner shaft holes on the inner chain plate (1) are fitted with the pin (5) with clearance. The two outer shaft holes on the outer chain plate (2) are fitted with the pin (5) with interference fit. A limiting plate (6) is installed on the pin (5) on the outer side of the inner chain plate (1). An annular protruding ridge is provided on the inner side of the limiting plate (6). The annular protruding ridge of the limiting plate (6) is engaged in the gap between the inner shaft hole of the inner chain plate (1) and the pin (5). An elastic component (7) is provided on the pin (5) between adjacent inner chain plates (1) and outer chain plates (2). The elastic component (7) is a spherical or ellipsoidal structure and includes an upper hemispherical shell (71), a lower hemispherical shell (72) and a middle partition (73). The middle partition (73) is installed between the upper hemispherical shell (71) and the lower hemispherical shell (72). The upper hemispherical shell (71) and the lower hemispherical shell (72) are filled with a high-elastic rubber layer (74). A component through hole in a straight line is provided at the center of the upper hemispherical shell (71), the lower hemispherical shell (72) and the middle partition (73). The pin (5) passes through the component through hole of the elastic component (7). A sleeve (3) and a roller (4) are provided on the pin (5) between the two inner chain plates (1). The sleeve (3) is fitted on the pin (5), and the roller (4) is fitted on the sleeve (3). An annular limiting protrusion is provided on the inner wall of the inner shaft hole of the inner chain plate (1). One end of the sleeve (3) is engaged in the inner shaft hole of the inner chain plate (1) on the inner side of the annular limiting protrusion. The annular protrusion ridge of the limiting plate (6) is engaged in the inner shaft hole of the inner chain plate (1) on the outer side of the annular limiting protrusion. The annular raised ridge on the inner side of the limiting plate (6) is composed of a tubular raised part (61) and an annular inclined part (62); the inner and outer walls of the tubular raised part (61) are perpendicular to the inner side of the limiting plate (6), and the annular inclined part (62) is fitted at the junction of the outer wall of the tubular raised part (61) and the inner side of the limiting plate (6). The annular inclined part (62) is an annular structure with a right-angled triangular cross section. Its inner wall is perpendicular to the inner side of the limiting plate (6) and fits against the outer wall of the tubular raised part (61). The outer wall of the annular inclined part (62) forms a certain angle with the inner side of the limiting plate (6) and is set in an inclined position.

2. The irregularly shaped roller chain according to claim 1, characterized in that, The upper hemispherical shell (71), the lower hemispherical shell (72), and the middle partition (73) are all made of elastic steel plate.

3. The irregularly shaped roller chain according to claim 1, characterized in that, The limiting plate (6), the annular raised ridge and the annular inclined part are integrally molded.

4. The irregularly shaped roller chain according to claim 1, characterized in that, The height of the annular inclined member (62) is lower than the height of the annular protruding ridge, and the bottom outer diameter of the annular inclined member is not greater than the outer diameter of the limiting plate (6).

5. A non-circular roller chain according to claim 1, characterized in that, The inner end face of the annular limiting protrusion is perpendicular to the inner wall of the inner shaft hole of the inner chain plate (1), and the outer end face of the annular limiting protrusion forms a certain angle with the inner wall of the inner shaft hole of the inner chain plate (1) and is set in an inclined manner.

6. A non-circular roller chain according to claim 5, characterized in that, The width of the inclined outer end face of the annular limiting protrusion is smaller than the width of the inclined outer wall of the annular inclined member.

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