JP2006046413A - Bearing roller chain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing roller chain achieving a longer lubricating oil resupply cycle by suppressing the leakage of lubricating oil filled in a roller and having improved water proofness and dust proofness by preventing the entry of foreign matters such as dust and water. <P>SOLUTION: The bearing roller chain 100 comprises a plurality of rollers 114 arranged in parallel to a generating line of a bush 112 between the bush 112 connecting opposed inner plates 111 and a roller 130 externally fitted to the bush 112. Oil sump circumferential grooves 134, 135 are formed on the inner peripheral face of the roller 130 and arranged light and left from the center toward the end of the roller. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bearing roller chain in which a plurality of rollers are arranged between rollers that are externally fitted to bushes that connect opposing inner plates, and more particularly to a bearing roller chain that can retain lubricating oil such as grease for a long period of time.

Conventionally, as a bearing roller chain, inward flanges are provided on both sides of the roller, a roller is inserted into a recess formed by the inner peripheral surface of the flange and the inner surface of the roller, and a seal is provided between the inner plate and the roller. Is provided with an annular lubricating oil filling space surrounded by the inner surface of the thrust ring, the inward surface of the flange, the outer peripheral surface of the bush and the end surface of the roller, and leading to the gap between the rollers. There is one that can be filled with a large amount of oil (see Patent Document 1).
Japanese Patent Publication No. 4-78523

However, the lubricating oil sealed in the roller flows slowly due to the revolution of the roller and leaks from the end of the roller on the sliding surface of the roller, particularly the sliding surface between the roller and the inner peripheral surface of the roller. And then gradually flows into the lubricating oil filling space and leaks from the lubricating oil filling space to the outside through a gap between a seal such as a thrust ring and a roller. For this reason, a gap is generated in the lubricating oil filling space due to insufficient filling of the lubricating oil, and dust or moisture enters the gap from the gap between the seal and the roller and enters the lubricating oil, causing corrosion or wear to the rollers. There was a problem of causing a chain failure or shortening the chain life.
Moreover, in order to avoid such a problem, there has been a problem that the supply cycle of the lubricating oil has to be shortened and a burden is placed on maintenance.

  Therefore, the problem to be solved by the present invention, that is, the object of the present invention is to suppress the leakage of the lubricating oil enclosed in the roller, lengthen the lubricating oil supply cycle, It is an object of the present invention to provide a bearing roller chain that prevents water from entering and has improved water resistance and dust resistance.

  First, the invention according to claim 1 is a bearing roller chain in which a plurality of rollers are arranged in parallel with a bushing line between a bush connecting opposite inner plates and a roller externally fitted to the bush. The oil sump circumferential groove formed on the inner peripheral surface of the roller is arranged on the left and right from the roller central portion toward the end portion, thereby solving the above-mentioned problem.

  Further, the bearing roller chain according to claim 2 has a cross section in which the oil sump circumferential groove is formed by an oil return vertical surface formed near the roller end and an oil guide inclined surface formed near the center of the roller. By being configured in a V-shape, the above-described problems are solved.

By providing the configuration as described above, the present invention has the following specific effects.
That is, in the bearing roller chain according to the first aspect of the present invention, the circumferential grooves for oil sump formed on the inner peripheral surface of the roller are arranged on the left and right from the roller center to the end, so As a result, the slow flow of lubricating oil from the roller center toward the end on the sliding surface between the roller inner peripheral surface and the roller, from the left and right ends, is part of the circumferential groove for oil sump. A large volume of the oil sump circumferential groove enters the oil sump circumferential groove and changes direction by the side wall of the oil sump circumferential groove to form turbulent flow between the roller and the oil sump circumferential groove. In combination with this, the flow of the lubricant toward the end is prevented.

  As described above, since the oil collecting circumferential groove suppresses the leakage of the lubricating oil from the end portion of the roller, the holding time of the lubricating oil in the roller is greatly increased, and the lubricating oil filling space is also increased. Since the inflow amount and the inflow pressure are significantly reduced, leakage from the seal to the outside can be suppressed, the lubricating oil supply cycle can be lengthened, dust and moisture can be prevented from entering, and dust resistance and water resistance can be reduced. improves.

  Furthermore, since the circumferential grooves for oil sump are arranged to the left and right from the roller center to the end, the left and right bias of the lubricant in the roller is suppressed, and foreign matter such as dust is prevented from entering. Therefore, the occurrence of skew can be prevented.

  Further, the bearing roller chain according to claim 2 has a cross-section V in which an oil sump circumferential groove has an oil return vertical surface formed near the roller end and an oil guide inclined surface formed near the center of the roller. Due to the configuration, the slow flow of lubricating oil from the center of the roller toward the end is distributed in the circumferential direction of the oil sump, most of which is oil guided near the center of the roller. Intruding into the oil sump circumferential groove along the sloping surface for the oil, changing the direction by the vertical surface for oil return, forming a large turbulent flow between the roller and the oil sump circumferential groove, Since the flow of the lubricant toward the end portion is hindered, the effect of the invention according to claim 1 described above can be further enhanced.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a bearing roller chain of the present embodiment, FIG. 2 is an exploded perspective view of the bearing roller chain of the present embodiment, and FIG. 3 is a cross-sectional view of the roller of the present embodiment. FIG. 4 is a partially enlarged sectional view of the roller of this embodiment.

  First, the bearing roller chain 100 according to the present embodiment is formed by alternately connecting the inner links 110 and the outer links 120 as shown in FIG. 1, and a pair of inner plates as shown in the exploded view of FIG. After the seal 113 is fitted into the bush 112 in which one of the members 111 is press-fitted and fixed, the roller 130 in which a plurality of rollers 114 are installed in parallel to the bus bar 112 is fitted on the outer periphery of the bush 112, and then the seal 113 is fitted. Thereafter, the other inner plate 111 is press-fitted and fixed to the bushing 112 to form the inner link 110, and a pair of outer plates 121 are arranged outside the pair of inner plates 111, and one end has a large diameter. A connecting pin 122 having a locking portion 122a and having an insertion hole 122b for the split pin P formed at the other end is connected to the inner link 1 from the insertion hole 121a on one outer plate. The 0 bush 112 and the insertion hole 121a of the other outer plate 121 are inserted, one outer side of the outer plate 121 is locked by the large-diameter locking portion 122a, and the outer side of the other outer plate 121 is connected to the connecting pin. The outer link 120 is connected to the inner link 110 by engaging with the split pin P inserted through the split pin insertion hole 122b of 122.

  In the above embodiment, the pair of outer plates are detachably locked by the large-diameter portion of the connecting pin and the split pin. However, one or both of the pair of outer plates may be fixed to the connecting pin. .

  As shown in FIGS. 3 and 4, the roller 130 has an inner peripheral surface 132 a of an inward flange 132 provided with recesses 133 for holding the rollers 114 on the inner peripheral surface thereof on both sides of the roller 130. And the inner peripheral surface 131 of the roller 130, and the inner peripheral surface of the recess 133, that is, the inner peripheral surface 131 of the roller, is an oil return vertical surface 134a, 135a formed near the roller end and the roller. The oil guide inclined surfaces 134b and 135b formed near the center have a V-shaped cross section, and two oil sump circumferential grooves 134 and 135 are arranged on the left and right sides from the roller center to the end. It is surrounded by the seal 113 interposed between the roller 130 and the inner plate 111, the inward surface 132b of the flange 132, the outer peripheral surface of the bush 112 and the end surface of the roller 114. Forming a lubricating oil-filled annular space leading to 114 of the gap.

Therefore, as shown in FIG. 4, when the bearing roller chain is used, a slow flow of the lubricating oil from the center of the roller 130 toward the end occurs on the sliding surface between the roller inner peripheral surface 131 and the roller 114. In the first oil sump circumferential groove 134, the direction is dispersed, and most of them enter the oil guide inclined surface 134 b formed near the center of the roller 130 of the oil sump circumferential groove 134, and the roller 130. By the oil return vertical surface 134a formed near the end of the roller, the direction is changed in the roller direction to form turbulent flow, and the flow of lubricating oil toward the roller end is greatly suppressed.
Similarly, in the second oil sump circumferential groove 135, the flow of the lubricating oil from the first oil sump circumferential groove 134 toward the second oil sump circumferential groove 135 is the second oil sump circumferential groove 135. The turbulent flow is formed by entering the circumferential groove 135, and the flow of the lubricating oil toward the roller end is greatly suppressed.

  In the above-described embodiment, two oil sump circumferential grooves are arranged on each of the left and right sides to divide and suppress the flow of the lubricating oil, but two or more may be provided on each of the left and right sides. In this case, a slow flow of the lubricating oil is also generated from the circumferential groove for oil sump toward the end, so that it is provided near the end to suppress this flow. Is preferred.

  Further, in the above embodiment, the flanges 132 are provided on both sides of the roller 130 to form the recess 133 for holding the roller 114 and the lubricating oil filling space is provided, but without providing such a flange 132, The end portion of the roller 114 may be held by a seal 113 interposed between the roller and the inner plate. Even in such a configuration, the flow of the lubricating oil on the sliding surface between the roller 114 and the inner peripheral surface of the roller is suppressed, and the leakage of the lubricating oil at the end of the roller is almost eliminated. The leakage of the lubricating oil from the gap can be prevented, and the same effect as in the above embodiment can be obtained.

  Furthermore, the shape of the circumferential groove for oil sump is not limited to that of the above-mentioned embodiment, and a V-shaped or U-shaped one can be used in the cross-sectional shape, but lubrication that enters the circumferential groove for oil sump In order to facilitate the turbulent flow of oil, the side wall near the end of the roller is preferably a vertical surface for returning oil, and the side wall near the center of the roller is preferably an inclined surface for guiding oil.

  As described above, according to the present invention, since the oil collecting circumferential groove is formed on the inner peripheral surface of the roller, the leakage of the lubricating oil from the roller end is greatly suppressed, and the leakage between the roller and the seal is prevented. Since the retention time of the lubricating oil in the roller is significantly increased, the supply cycle of the lubricating oil can be extended, and intrusion of dust and moisture can be prevented, greatly increasing the dust resistance and water resistance. It has a tremendous effect of being improved.

The perspective view of the principal part of the bearing roller chain of this invention. The exploded perspective view of the principal part of the bearing roller chain of the present invention Sectional drawing of the roller of this invention. The partially expanded sectional view of the roller of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Bearing roller chain 110 ... Inner link 111 ... Inner plate 112 ... Bush 113 ... Seal 114 ... Roller 120 ... Outer link 121 ... Outer plate 121a ... Insertion hole 122 ... Connecting pin 122a ... Large diameter part 122b ... Insertion hole 130 ... Roller 131 ... Inner peripheral surface 132 ... Flange 132a ... Inner peripheral surface 132b ... Inside Orientation surface 133... Concave portion 134... First oil sump circumferential groove 134a... Oil return vertical surface 134b... Oil guide inclined surface 135. Groove 135a ... Oil return vertical surface 135b ... Oil guiding inclined surface

Claims (2)

  In a bearing roller chain in which a plurality of rollers are arranged in parallel to the bushing line between a bush connecting opposite inner plates and a roller fitted on the bush, the oil pool is formed on the inner peripheral surface of the roller. A bearing roller chain characterized in that circumferential grooves are arranged on the left and right sides from the roller center to the end.   The oil sump circumferential groove is configured to have a V-shaped cross section with an oil return vertical surface formed near the roller end and an oil guiding inclined surface formed near the center of the roller. The bearing roller chain according to claim 1.

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