JPS6137893Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for effectively supplying lubricating oil to mutually rotating surfaces of a connecting pin and a bush in a roller chain.

In the roller chain, a connecting pin 2 is inserted and fitted into a pair of spaced apart outer link plates 1, 1, and a bush 3 is inserted between the opposing surfaces of the outer link plates on the connecting pin 2.
is rotatably fitted, and both ends of the bush 3 are inserted and fitted into a pair of spaced apart inner link plates 4, 4, and a roller 5 is mounted on the bush 3 between the opposing surfaces of the inner link plates 4, 4. The ends of a pair of outer link plates and inner link plates, which are rotatably supported and arranged alternately in the longitudinal direction of the chain, are overlapped and connected by connecting pins, and as shown in the figure, both end surfaces of the bush 3 are On the connecting pin 2, it is in contact with the opposing surfaces of the outer link plates 1, 1, and since the inner surface of the outer link plate 1 and the outer surface of the inner link plate are in sliding contact with each other, the outer circumferential surface of the connecting pin 2 When supplying oil between the rotating surfaces formed by the inner peripheral surface of the bushing 3, inject lubricating oil through the sliding gap between the outer link plate 1 and the inner link plate 4,
The lubricating hole may be inserted between the rotating surfaces from the end face of the bushing 3, or a lubricating hole may be drilled in the axial direction of the connecting pin 2, and a lubricating hole in the radial direction communicating with the lubricating hole may be provided on the outer peripheral surface of the connecting pin 2. Means is used to supply oil between the rotating surfaces by opening the rotating surfaces.

However, in the former case, the sliding gap between the outer link plate 1 and the inner link plate 4 is made extremely narrow in order to prevent chain vibration and noise, eliminate lateral runout of the chain, and improve chain performance.
Most of the injected lubricating oil does not reach the end face of the bush 3 and overflows to the outside, and the small amount of lubricating oil that does reach the surface is not enough to penetrate the entire length between the rotating surfaces, and the lubricating oil This resulted in waste of energy and occurrence of burn-in. The latter requires processing technology to drill communicating oil holes in the axial and radial directions on the connecting pin, and in order to prevent oil from leaking from the oil hole opened on the end face of the connecting pin, the opening must be closed using a tumbler or the like. It has the drawback that it requires a complicated structure such as the need for closure.

The present invention eliminates the above-mentioned drawbacks of the conventional technology, and a radial oiling hole 6 is provided through the outer peripheral surface of the bushing 3, where the opposing surfaces of the inner link plate 4 and the roller 5 are located, so that lubricating oil can be directly supplied. It is injected between the rotating surfaces of the connecting pin 2 and the bush 3.

That is, since the roller 5 must always rotate smoothly and lightly while the chain is running, the roller 5 must be placed between the opposing surfaces of the inner link plate 4 and the roller 5.
Since a gap is formed in which the lubricant moves somewhat in the axial direction on the bush 3, when lubricating from this free-floating gap as shown by arrow A, most of the lubricant is supplied to the lubricating hole 6, and the connecting pin is flushed without waste. 2 and the bush 3 over the entire length between them.

Also, as shown in the figure, a boss 7 is provided at the shaft insertion portion of the roller 5.
is protruding, so the inner link plate 4 and boss 7
If the gap between the facing surfaces is narrow, the boss 7 is provided with a radial groove 8 to effectively guide the oil to the oil fill hole 6.

As described above, the present invention maintains the accuracy of the chain by bringing the inner surface of the outer link plate into contact with the outer surface of the inner link plate, while maintaining the opposing surface between the roller and the inner link plate, which constantly rotate while the chain is running. A lubricating hole 6 communicating with the floating gap is connected to the bush 3.
The lubrication hole 6 is provided in the radial direction of the bush 3 so that oil can be supplied from the outside efficiently and reliably over the entire length of the rotating surface between the connecting pin and the bush. A simple process of inserting the connecting pin through the bushing is sufficient, reducing the relative wear between the connecting pin and the bushing, and significantly improving the durability of the chain.

[Brief explanation of the drawing]

The drawing is a cross-sectional view of a chain connection part showing an embodiment of the present invention. 1, 1... Outer link plate, 2... Connecting pin, 3... Bush, 4, 4... Inner link plate, 5... Roller, 6... Lubrication hole.

Claims (1)

[Scope of utility model registration request] A pair of inner links in which a connecting pin is inserted and fitted into a pair of spaced apart outer link plates, a bushing is rotatably fitted between opposing surfaces of the outer link plates on the linking pin, and both ends of the bushing are spaced apart. In a roller chain that is fitted through a plate and rotatably supports a roller on the bush between opposing surfaces of the inner link plate, an oil supply hole is provided on the bush where the gap between the opposing surfaces of the inner link plate and the roller is located. A lubricating device that runs through the bush in the radial direction.