JP3100876B2 - Composite knitting roller chain for high-speed transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a roller chain used for chain transmission means.

[0002]

2. Description of the Related Art Conventionally, a chain transmission means using a roller chain has many sizes of rollers specified by standards such as JIS (Japan), ANSI (US), BS (UK), as well as rolling bearings. A chain and sprockets with various numbers of teeth that mesh with it are available.
In addition, since it is relatively inexpensive to obtain as a power transmission means when the distance between the shafts is long, it has been widely used as a power transmission means for mechanical devices used in various industrial fields.

[0003]

However, the conventional chain transmission means, compared with the gear transmission means which is the same mesh transmission means, has a non-uniform rotation speed and meshes between the tooth surfaces of the rollers and the sprocket. There is a problem of generating noise due to the collision at the time.

[0004] In the roller chain, when the roller meshes with the tooth surface of the sprocket, the collision between the tooth surface of the sprocket and the roller is repeated at the pitch of the link, and the rotation speed of the sprocket is set to n (rpm). If the number is N,
Collisions occur nN / 60 times per second, and the frequency of the exciting force due to the collision becomes the fundamental frequency, which causes noise and vibration.

Further, the energy of the collision at the time of meshing increases in proportion to the square of the product of the number of revolutions of the sprocket and the link pitch of the chain (the distance between the roller centers), so that as the number of revolutions of the sprocket increases. However, since loud noise is generated and power transmission efficiency is reduced, the chain transmission means is not suitable for high-speed power transmission. And, in recent years, higher performance of mechanical equipment, that is,
With demands for higher speeds, higher efficiency, and lower noise, power transmission means using roller chains as described above are said to promote environmental degradation, and applications for power transmission at low speeds are narrowed. It is used at present.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a composite knitting roller chain for high-speed transmission that solves the above-mentioned problems in the conventional chain transmission and generates less noise and vibration during high-speed transmission.

[0007]

To achieve the above object, a knitting roller chain for high-speed transmission according to the present invention is constituted by connecting a number of inner links and a number of outer links, and the rollers rotate on the plurality of inner links. In the roller chain freely held, the outer link is formed by forming the thickness of a part of the inner link and the outer link constituting the roller chain to be larger than the thickness of the other link. The mass of the link is increased so that disturbance occurs in the periodic excitation force due to the collision of the link at every pitch when the roller meshes with the sprocket tooth surface.

[0008]

The mass of the outer link is increased by forming the thickness of the outer link of the inner link and the outer link constituting the roller chain to be greater than the thickness of the other link. When the teeth of the sprocket mesh with the rollers of the roller chain, the disturbance occurs in the periodic excitation force due to the collision of the link at every pitch when the teeth of the sprocket mesh with the teeth of the sprocket. A collision occurs between the two, but if a disturbance occurs in the periodic excitation force due to the collision of the roller chain at each link pitch,
A frequency different from the fundamental frequency is generated in the frequency of the noise generated by the excitation force, and the energy of the collision is dispersed in each frequency range. As a result, the peak frequency of the noise is dispersed into a plurality of frequencies, and the level of the noise intensity decreases.

[0009]

FIG. 1 shows an embodiment of a composite knitting roller chain for high-speed transmission according to the present invention. The roller chain 11 shown in FIG. 1 is configured by connecting a number of inner links 14 and a number of outer links 15, and the rollers 12 are rotatably held by the inner links 14. Further, as shown in the drawing, of the inner link 14 and the outer link 15 constituting the roller chain 11, some outer links 15A are formed thicker than others. Therefore, only a part of the outer link 15A has a larger mass than the other parts, and the rollers 12A and 12B provided in this part are not connected to the driving sprocket (not shown). At the time of meshing, disturbance occurs in the periodic excitation force due to the collision that occurs when the roller 12 attached to the position of the other link meshes with the tooth surface of the sprocket. As a result, the peak of the noise generated by the collision can be dispersed over a plurality of frequency ranges, and high-speed transmission with low noise can be performed.

[0010]

As described above, according to the composite knitting roller chain for high-speed transmission of the present invention, the thickness of a part of the inner link and the outer link constituting the roller chain is changed to other links. The thickness of the outer link is increased by increasing the thickness of the outer link so that disturbance occurs in the periodic excitation force caused by the collision of the link at every pitch when the roller and the sprocket tooth surface mesh with each other. With this configuration, the peak of the noise generated by the collision can be dispersed in a plurality of frequency ranges, and high-speed transmission with low noise can be performed.

The composite knitting roller chain for high-speed transmission according to the present invention does not require a complicated structure in which the pitch of the link is partially changed or the outer diameter of the roller is partially changed. Since the outer link has a simple configuration in which the thickness of the outer link is increased by forming the outer link thicker than the thickness of the other links, the present invention can be easily applied to a conventional ordinary roller chain. be able to.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a composite knitting roller chain for high-speed transmission according to the present invention.

[Explanation of symbols]

 11 Roller chain 12 (12A, 12B) Roller 14 Inner link 15 (15A) Outer link

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) F16G 13/02-13/10 F16H ⁷ /00-7/24 F16H 51/00-55/30

Claims (1)

(57) [Claims] 1. A plurality of inner links and a number of outer links are connected.
The rollers are rotated by the inner links.
In the roller chain currently held, the row
One of the inner and outer links that make up the chain
The thickness of the outer link of the part is made thicker than the thickness of the other links.
By increasing the mass of some of the outer links,
Of the link when the roller engages with the sprocket tooth surface
Disturbance occurs in the periodic excitation force due to collision at every pitch
Composite knitting machine for high-speed transmission
Chain.