JP6226757B2 - chain - Google Patents

Description

The present invention relates to Ruchi En is slidably guided by the guide shoe.

  2. Description of the Related Art Conventionally, a chain that is incorporated in a timing system in an engine room of an automobile, wound around a plurality of sprockets, and travels while being guided by a chain guide is known (see, for example, Patent Document 1).

  This conventional chain travels with the shoe side end surface of the link plate in contact with the guide shoe of the chain guide.

JP 2007-107583 A

  However, in such a conventional chain, in order to reduce friction between the link plate and the guide shoe of the chain guide and wear of the guide shoe, lubrication between the link plate and the guide shoe is required during use. Oil is supplied, but if the oil film is cut between the link plate and the guide shoe, or if the oil film thickness is insufficient, the friction between the guide shoe and the chain will increase, and the guide shoe will wear. The problem of being promoted will arise.

  It is also known to form a groove or the like on the shoe side end surface of the link plate for the purpose of forming an oil reservoir on the shoe side end surface of the link plate. However, such a groove or the like functions as an oil reservoir, but depending on the viscosity of the lubricating oil, the running speed of the chain, etc., the lubricant accumulated in the groove or the like can be drawn out on the sliding surface of the shoe side end surface. It is difficult and there is a problem that the lubricating oil is not supplied well onto the sliding surface of the shoe side end surface.

The present invention is intended to solve these problems, a simple structure, while suppressing the cutting of the lubricating oil, which can be excellently supply the lubricating oil on the sliding surface of the shoe-side end face Ji The purpose is to provide a chain.

The present invention includes a Brighter linked plate is slidably guided by the guide shoe, and said link plate second link plate is lower plate rear height of the shoe-side end surface than there with the chain arranged side by side in the chain width direction Te, the shoe-side end face of the link plate, the oil guide portion having a pair of inductive wall is provided, said pair of induction walls, facing respective front side of the chain traveling direction, the rear side of the chain traveling direction The second link plate is formed on the shoe side end face so as to approach the link plate side adjacent to the chain width direction toward the rear side in the chain traveling direction. By providing the oil guide wall surface , the above-mentioned problem is solved.

  According to the first aspect of the present invention, the shoe-side end surface of the link plate is provided with an oil guide portion having a pair of guide wall surfaces, and the pair of guide wall surfaces face the front side in the chain travel direction, By being formed so as to approach each other toward the rear side in the chain traveling direction, the lubricating oil is guided to approach each other by the pair of guide wall surfaces as the chain travels, and the wall approach of the pair of guide wall surfaces Since the pressure of the lubricating oil is increased in the portion and the oil film thickness is increased, friction with the guide shoe is reduced, smooth chain running is achieved, and excellent wear resistance can be exhibited.

According to the second aspect of the present invention, since each guide wall surface is formed as a flat surface, the pair of guide wall surfaces approach each other linearly, and the lubricating oil is guided linearly toward the wall approaching portion. Therefore, the pressure of the lubricating oil at the wall approaching portion can be further increased.
According to the third aspect of the present invention, since the pair of guide wall surfaces are connected to each other at the wall approaching portion, there is no escape route for the lubricating oil at the wall approaching portion, thereby improving the effect of forming an oil film at the wall approaching portion. be able to.
According to the fourth aspect of the present invention, since one end of the guide wall surface reaches the edge of the link plate in the chain width direction, the lubricating oil existing in the vicinity of the running line of the chain is removed from the shoe side end surface by the guide wall surface. And the guide shoe.
According to the invention of claim 5, the oil guide portion has a pair of second guide wall surfaces disposed opposite to the pair of guide wall surfaces on the front side in the chain traveling direction of the pair of guide wall surfaces, The pair of second guide wall surfaces are formed in front of the pair of guide wall surfaces by facing the rear side in the chain running direction and approaching each other toward the rear side in the chain running direction. Since the lubricating oil can be guided toward the wall approaching portion also by the pair of second guide wall surfaces, the effect of forming an oil film at the wall approaching portion can be improved.
According to the first aspect of the present invention, the second link plate is arranged next to the link plate on which the oil guiding portion is formed, and on the shoe side end surface of the second link plate, on the rear side in the chain traveling direction. Therefore, by providing an oil guide wall surface formed so as to approach the link plate side, the lubricating oil positioned between the second link plate and the guide shoe is directed toward the link plate side as the chain travels. Since it is possible to guide, the friction between the link plate and the guide shoe can be further reduced.

The perspective view which shows the chain which concerns on a 1st reference example . Explanatory drawing which shows the shoe side end surface of the link plate which concerns on a 1st reference example . The perspective view which shows the link plate which concerns on a 2nd reference example . Explanatory drawing which shows the shoe side end surface of the link plate which concerns on a 2nd reference example . Explanatory drawing which shows the shoe side end surface of the link plate which concerns on the modification of a 2nd reference example . The perspective view which shows the link plate which concerns on a 3rd reference example . Explanatory drawing which shows the shoe side end surface of the link plate which concerns on a 3rd reference example . The perspective view which shows the chain which concerns on one Embodiment of this invention . The perspective view which shows the chain which concerns on the modification of one Embodiment of this invention .

Below, the chain 100 of a 1st reference example is demonstrated based on FIG. 1 and FIG.

The chain 100 of the first reference example is configured as a timing chain incorporated in a timing system for an automobile engine. The chain 100 is slidably guided by a guide shoe (not shown) of a chain guide (not shown) and moves on a predetermined track. It is something to run.

As shown in FIGS. 1 and 2, the chain 100 of the first reference example includes a plurality of inner links formed by fixing both ends of a pair of front and rear bushes 120 to bush holes of a pair of left and right inner link plates 110, and a pair of front and rear pairs. A plurality of outer links formed by fixing both ends of the connecting pin 140 to the pin holes of the pair of left and right outer link plates 130, and a roller 150 fitted on the bush 120. These inner links and outer links are alternately connected by inserting connecting pins 140 into the bush 120.

Each of the link plates 110 and 130 has shoe side end surfaces 111 and 131 on the side facing the guide shoe. In the first reference example , both the shoe-side end surface 111 of the inner link plate 110 and the shoe-side end surface 131 of the outer link plate 130 are formed to slide on the guide shoe during chain travel.

As shown in FIG. 2, each shoe side end surface 111, 131 has a plurality of U-shaped plate recesses 112, 132 arranged side by side in the chain running direction D. A plurality of oil guiding portions 114 and 134 are formed side by side in the chain traveling direction D. Both ends of the plate recesses 112 and 132 in the chain width direction are open at both ends of the link plates 110 and 130 in the chain width direction (plate thickness direction). In this reference example , the convex portions of the shoe side end surfaces 111 and 131 (portions where the plate concave portions 112 and 132 are not formed) function as a sliding surface between the shoe and the shoe side end surfaces 111 and 131. (Plate concave portions 112 and 132) function as an oil reservoir.

  As shown in FIG. 2, each of the oil guide portions 114 and 134 is a place where the pair of guide wall surfaces 114 a and 134 a that are the rear inner wall surfaces of the plate recesses 112 and 132 and the pair of guide wall surfaces 114 a and 134 a are close to each other. It has wall approach parts 114b and 134b and a pair of second guide wall surfaces 114c and 134c which are front inner wall surfaces of the plate recesses 112 and 132.

  As shown in FIG. 2, each of the guide wall surfaces 114 a and 134 a is formed in a flat surface and faces the front side in the chain running direction D. The pair of guide wall surfaces 114a and 134a extend obliquely with respect to the chain traveling direction D so as to approach each other toward the rear side in the chain traveling direction D, and are connected to each other at the wall approaching portions 114b and 134b. One end of each of the guide wall surfaces 114a and 134a (the end opposite to the wall approaching portions 114b and 134b) reaches the edge of the link plates 110 and 130 in the chain width direction.

  As shown in FIG. 2, each of the second guide wall surfaces 114c and 134c is formed on a flat surface, faces the rear side in the chain running direction D, and faces each of the guide wall surfaces 114a and 134a. The pair of second guide wall surfaces 114c and 134c extend obliquely with respect to the chain travel direction D so as to approach each other toward the rear side in the chain travel direction D, and are connected to each other. One end of each of the second guide wall surfaces 114c and 134c reaches the edge of the link plates 110 and 130 in the chain width direction.

Next, a second reference example chain 200 will be described with reference to FIGS. 3 and 4. Here, the second reference example is exactly the same as the first reference example described above except for a partial configuration. Therefore, by replacing the reference numerals in the 100th series shown in the specification and drawings relating to the first reference example with the reference numerals in the 200th series, description of the configuration other than the difference will be omitted.

In the chain 200 of the second reference example , as shown in FIGS. 3 and 4, a plurality of plate recesses 212 and 232 are formed side by side in the chain running direction D at both ends of each shoe side end surface 211 and 231 in the chain width direction. As a result, a plurality of oil guide portions 214 and 234 are formed side by side in the chain running direction D at both ends of the shoe side end surfaces 211 and 231 in the chain width direction. In the examples shown in FIGS. 3 and 4, two oil guide portions 214 and 234 are arranged in the chain width direction. However, the number of oil guide portions 214 and 234 arranged in the chain width direction may be three or more. Good. One end of each plate recess 212, 232 in the chain width direction is open at one end edge of the link plate 210, 230 in the chain width direction.

Next, a modification of the second reference example will be described with reference to FIG.

The difference between the second reference example shown in FIG. 4 and the modification shown in FIG. 5 is that the concavo-convex relationship on the shoe side end surfaces 211 and 231 is reversed. Specifically, in the second reference example , The plate concave portions 212 and 232 are replaced with plate convex portions 213 and 233. In this modification, the convex portions (plate convex portions 213 and 233) of the shoe side end surfaces 211 and 231 function as sliding surfaces between the guide shoes, and the concave portions of the shoe side end surfaces 211 and 231 (plate convex portions 213). The portion where 233 is not formed functions as an oil reservoir.

In the modification shown in FIG. 5, each of the oil guide portions 214 and 234 has a pair of guide wall surfaces 214 a and 234 a which are front outer wall surfaces of the plate convex portions 213 and 233 and a pair of guide wall surfaces 214 a and 234 a approach each other A pair of second outer wall surfaces 214b and 234b, which are locations, and rear outer wall surfaces of the plate convex portions 213 and 233 disposed on the front side of the plate convex portions 213 and 233 on which the guide wall surfaces 214a and 234a are formed. Guide wall surfaces 214c and 234c. About the structure of each part of these oil guide parts 214 and 234, it is the same as that of the case of a 1st reference example .

Next, the chain 300 of the third reference example will be described with reference to FIGS. 6 and 7. Here, the third reference example is exactly the same as the first reference example described above except for a partial configuration. Therefore, by replacing the reference numerals in the 100s shown in the specification and drawings relating to the first reference example with the reference numerals in the 300s, the description of the configuration other than the differences will be omitted.

In the chain 300 of the third reference example , as shown in FIGS. 6 and 7, a plurality of parallelogram-shaped plate recesses 312 and 332 are formed in the chain running direction D at both ends of the shoe side end surfaces 311 and 331 in the chain width direction. Accordingly, a plurality of oil guide portions 314 and 334 are formed side by side in the chain running direction D at both ends of the shoe side end surfaces 311 and 331 in the chain width direction. One end of each plate recess 312 and 332 in the chain width direction is open at one end edge of the link plates 310 and 330 in the chain width direction.

  Each oil guide portion 314, 334 has a pair of guide wall surfaces 314a, 334a and wall approach portions 314b, 334b where the pair of guide wall surfaces 314a, 334a are close to each other. Of the pair of guide wall surfaces 314a and 334a, one guide wall surface 314a and 334a extends along the chain travel direction D, and the other guide wall surface 314a and 334a extends obliquely with respect to the chain travel direction D.

Next, a chain 400 according to an embodiment of the present invention will be described with reference to FIG. Here, this embodiment is the same as the first reference example described above except for a partial configuration. Therefore, by replacing the reference numerals in the 100th series shown in the description and drawings relating to the first reference example with the reference numerals in the 400th series, the description of the configuration other than the difference will be omitted.

In the chain 400 of the present embodiment, as shown in FIG. 8, the outer link plate 430 is formed with a plate back height lower than the inner link plate 410 and with a plate back height that touches the guide shoe. Yes. The shoe side end surface 431 of the outer link plate 430 is formed so as to approach the inner link plate 410 side where the oil guiding portion 414 adjacent in the chain width direction is formed toward the rear side in the chain running direction D. An oil guide wall surface 435 is provided. The oil guide wall surface 435 faces the front side in the chain traveling direction D.

  In the example shown in FIG. 8, the oil guide wall surface 435 is formed on a flat surface, but the oil guide wall surface 435 may be formed on a curved surface as in the example shown in FIG.

In the above-described embodiments and reference examples , the chain is described as a timing chain for an automobile engine. However, the application of the chain of the present invention is not limited to this, and any chain such as a transmission chain or a conveyance chain can be used. Good.
In the above-described embodiment and reference examples , the chain is described as a roller chain. However, the chain of the present invention may be any as long as it has a plate that is slidably guided by the guide shoe. For example, a bush chain or a silent chain may be used.
In the above-described embodiments and reference examples , the guide wall surface (and the second guide wall surface) has been described as being formed as a flat surface. However, the specific mode of the guide wall surface (and the second guide wall surface) is described here. For example, the guide wall surface (and the second guide wall surface) may be formed in a convex or concave curved surface.
Further, the specific shapes and arrangements of the plate recesses and the plate protrusions may be any as long as they constitute a pair of guide wall surfaces that approach each other toward the rear side in the chain traveling direction.
Further, the configuration of the implementation form and reference examples and modifications described above, may no be constituted chain in any combination.
The material of each component of the chain may be any material such as metal or synthetic resin.

100, 200, 300, 400 ... Chain 110, 210, 310, 410 ... Inner link plate 111, 211, 311, 411 ... Shoe-side end surface 112, 212, 312, ... Plate recess
213 ... Plate convex part 114, 214, 314, 414 ... Oil guide part 114a, 214a, 314a ... Guide wall surface 114b, 214b, 314b ... Wall approach part 114c, 214c ... Second Guide wall surface 120 420 ... Bushings 130, 230, 330, 430 ... Outer link plates 131, 231, 331, 431 ... Shoe side end faces 132, 232, 332 ... Plate recesses
233 ... Plate convex part 134, 234, 334 ... Oil guide part 134a, 234a, 334a ... Guide wall surface 134b, 234b, 334b ... Wall approach part 134c, 234c ... 2nd guide wall surface
435 ... Oil guide wall surface 140, 440 ... Connecting pin 150, 450 ... Roller D ... Chain travel direction

Claims (5)

And Brighter linked plate is slidably guided by the guide shoe, and said link plate second link plate is lower plate rear height of the shoe-side end surface than a chain arranged side by side in the chain width direction,
The shoe side end surface of the link plate is provided with an oil guide portion having a pair of guide wall surfaces,
The pair of guide wall surfaces face the front side in the chain traveling direction, and are formed so as to approach each other toward the rear side in the chain traveling direction ,
The shoe-side end surface of the second link plate is provided with an oil guide wall surface formed so as to approach the link plate side adjacent in the chain width direction toward the rear side in the chain traveling direction. A characteristic chain . The chain according to claim 1, wherein the pair of guide wall surfaces constituting the oil guide portion are respectively formed on flat surfaces. The chain according to claim 1 or 2, wherein a pair of guide wall surfaces constituting the oil guide portion are connected to each other at a wall approaching portion. One end of the induction walls, chain according to any one of claims 1 to 3, characterized in that it reached the chain width direction of the end edge of the link plate. The oil guide portion has a pair of second guide wall surfaces disposed opposite to the pair of guide wall surfaces on the front side in the chain traveling direction of the pair of guide wall surfaces,
The pair of second guide wall surfaces are formed so as to face the rear side in the chain traveling direction and to approach each other toward the rear side in the chain traveling direction, respectively. 4. The chain according to any one of 4.

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