JP2016035272A - chain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chain which enables a lubricant to be efficiently maintained in between a pin and a bush.SOLUTION: A chain 11 includes: a pair of facing inner link plates 12; a bush 17 penetrating through the pair of inner link plates 12 and having both end parts protruding to the outer side of the pair of inner link plates 12; a pin 20 inserted into the bush 17; a pair of outer link plates 14 which are disposed so as to sandwich the pair of inner link plates 12 from the outer side and through which both end parts of the pin 20 penetrate; and absorbers 19, each of which is disposed between an outer surface 12a of the inner link plate 12 and an inner surface 14a of the outer link plate 14 and may absorb a lubricant. The pin 20 penetrates through each absorber 19 and the absorber 19 has an interposed part 31c interposed between the inner surface 14a of the outer link plate 14 and an end surface 17b of the bush 17.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a chain in which an absorbent material capable of absorbing a lubricant is disposed between an outer surface of an inner plate and an inner surface of an outer plate.

  Conventionally, this type of chain is known in which a moisture absorbent (absorbent) is disposed between an inner plate (inner link plate) and an outer plate (outer link plate) (for example, Patent Document 1). reference). In such a chain, the hygroscopic material is provided between the inner plate and the outer plate so as to surround each end face of the bush in order to hold the lubricating oil (lubricant) between the pin and the bush.

Japanese Patent Laid-Open No. 11-351338

  By the way, in the chain as described above, since the hygroscopic material is separated from between the pin and the bush, the lubricating oil leaking from between the pin and the bush is absorbed by the hygroscopic material, or the lubricating oil absorbed by the hygroscopic material is It is difficult to efficiently supply to the bush. For this reason, there is room for improvement in retaining the lubricating oil between the pin and the bush.

  The present invention has been made paying attention to such problems existing in the prior art. The object is to provide a chain capable of efficiently retaining the lubricant between the pin and the bush.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A chain that solves the above problems includes a pair of inner link plates that are arranged opposite to each other, and a cylinder that passes through the pair of inner link plates and has both ends projecting to the outside of the pair of inner link plates. And a pair of outer link plates that are disposed so as to sandwich the pair of inner link plates from the outside and through which both ends of the pins penetrate, respectively, and an outer side of the inner link plate A chain that is disposed between a side surface and an inner surface of the outer link plate and is capable of absorbing a lubricant, wherein the absorber is penetrated by the pin and the outer link plate And an intervening portion interposed between the inner surface of the bush and the end surface of the bush.

  According to this configuration, since the interposed part is disposed at a position close to between the pin and the bush, the lubricant leaking from between the pin and the bush is absorbed by the absorbent, or the lubricant absorbed by the absorbent. Can be efficiently performed between the pin and the bush. For this reason, it becomes possible to hold | maintain a lubricant efficiently between a pin and a bush.

In the chain, it is preferable that the absorbent member has a seal portion that contacts an outer surface of the inner link plate in a state of surrounding an outer periphery of the bush.
According to this configuration, it is possible to effectively prevent the lubricant between the pin and the bush from leaking to the outside.

  In the chain, the absorbent material preferably includes a first absorbent material having the interposed portion and a second absorbent material that is formed separately from the first absorbent material and has the seal portion. .

According to this configuration, even when one of the first absorbent material and the second absorbent material is damaged, it is possible to suppress leakage of the lubricant to the outside from between the pin and the bush by the other.
In the chain, it is preferable that the first absorbent material and the second absorbent material are in contact with each other in a state in which the first absorbent material and the second absorbent material are partially overlapped in the extending direction of the pin.

According to this structure, it becomes possible to improve the sealing performance with respect to the lubricant when the lubricant between the pin and the bush leaks to the outside.
In the chain, a gap is preferably formed between the seal portion and the outer peripheral surface of the bush.

  According to this configuration, the lubricant can be stored between the seal portion and the outer peripheral surface of the bush.

  According to the present invention, the lubricant can be efficiently held between the pin and the bush.

The disassembled perspective view which shows a part of chain of one Embodiment. Sectional drawing which shows a part of the chain. The principal part expanded sectional view of the chain of the example of a change. The principal part expanded sectional view of the chain of the example of a change. The principal part expanded sectional view of the chain of the example of a change.

Hereinafter, an embodiment of a chain will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the chain 11 includes a plurality of inner links 13 each having a pair of inner link plates 12 that are arranged to face each other in the width direction Y, and a pair of inner link plates 12. And a plurality of outer links 15 each having a pair of outer link plates 14 disposed so as to be sandwiched from the outside in the width direction Y.

  The inner link plate 12 of the inner link 13 and the outer link plate 14 of the outer link 15 are along the series direction X, which is also the moving direction when the chain 11 is pulled and moved from one side in the longitudinal direction perpendicular to the width direction Y. It has a rounded plate shape that stretches out, and the center is slightly confined. The inner link plate 12 and the outer link plate 14 that face each other in the width direction Y are arranged so as to be parallel to each other.

  Therefore, in the chain 11 of this embodiment, the distance between the inner link plates 12 and the distance between the outer link plates 14 are equal on the one end side and the other end side of the inner link 13 and the outer link 15 in the serial direction X, respectively. This is a so-called flat type chain.

  At both ends of the inner link plate 12 in the series direction X, circular bush insertion holes 16 are formed so as to penetrate in the width direction Y which is also the thickness direction of the inner link plate 12. Two cylindrical bushes 17 are assembled between the pair of inner link plates 12 facing each other in the inner link 13 so as to maintain the distance between the pair of inner link plates 12.

  Both ends of the bush 17 are fitted into the bush insertion holes 16 of the pair of inner link plates 12, respectively. That is, both end portions of the bush 17 penetrate the pair of inner link plates 12 and project outside the pair of inner link plates 12. The bush 17 is inserted into a cylindrical roller 18 so as to rotatably support the roller 18. That is, the bush 17 is loosely fitted to the roller 18 disposed between the pair of inner link plates 12. An absorbent 19 that can absorb a lubricant such as grease is disposed between the outer surface 12 a of the inner link plate 12 and the inner surface 14 a of the outer link plate 14.

  In addition, circular pin insertion holes 21 into which cylindrical pins 20 each having an outer diameter slightly smaller than the inner diameter of the bush 17 are fitted at both ends in the serial direction X of the outer link plate 14 are the outer link plates. It is formed so as to penetrate in the width direction Y which is also the thickness direction of 14. The outer link plate 14 of the outer link 15 is connected to the inner link 13 via the pin 20 from the outside of the inner link plate 12 in the inner link 13 formed by assembling the bush 17 between the pair of inner link plates 12. The link plate 12 is rotatably connected.

  In this case, the pin 20 is inserted into the bush 17 assembled between the pair of inner link plates 12 of the inner link 13 at an intermediate portion other than both ends, and the pair of outer link plates of the outer link 15 at both ends. 14 pin insertion holes 21 are fitted. Therefore, both ends of the pin 20 penetrate the pair of outer link plates 14 respectively, and the inner link plate 12 of the inner link 13 and the outer link plate 14 of the outer link 15 adjacent in the series direction X are in the series direction X. The ends are connected to each other via a pin 20 and a bush 17 so as to be rotatable.

  A lubricant is filled between the inner peripheral surface 17a of the bush 17 and the outer peripheral surface 20a of the pin 20, and the relative rotation between the bush 17 and the pin 20 is lubricated by the lubricant. In addition, the chain 11 of this embodiment is comprised with the steel material.

Next, the configuration of the absorbent 19 will be described in detail.
As shown in FIGS. 1 and 2, the absorbent material 19 can be made of a material that can absorb a lubricant (lubricating oil) such as felt or sponge, and is made of felt in this embodiment. The absorbent material 19 absorbs and holds the lubricant, and is configured separately from the first absorbent material 31 and the first absorbent material 31 that form a shape along the outer link plate 14 and has an annular plate shape. And a second absorbent material 32.

  The first absorbent material 31 is disposed such that the outer side surface 31 a contacts the inner side surface 14 a of the outer link plate 14. On the other hand, the second absorbent material 32 is disposed such that the inner side surface 32 a contacts the outer side surface 12 a of the inner link plate 12. The first absorbent material 31 and the second absorbent material 32 are in contact with each other in a partially overlapping manner in the width direction Y that is also the direction in which the pin 20 extends. That is, a part of the inner side surface 31 b of the first absorbent material 31 is in contact with a part of the outer side surface 32 b of the second absorbent material 32.

  Two through holes 31 e corresponding to the two pin insertion holes 21 of the outer link plate 14 are formed in the first absorbent material 31. The pins 20 are respectively inserted into the two through holes 31 e of the first absorbent material 31. Accordingly, the first absorbent 31 is penetrated by the pins 20.

  A portion interposed between the inner side surface 14 a of the outer link plate 14 and the end surface 17 b of the bush 17 in the first absorbent material 31 is an interposed portion 31 c. That is, the 1st absorber 31 has the interposed part 31c. In the present embodiment, a slight gap is formed between the interposition part 31c and the end surface 17b of the bush 17, but this interposition causes the interposition part 31c and the end surface 17b of the bush 17 to contact each other. It may be eliminated.

  The second absorbent member 32 has an insertion hole 32c that is slightly larger in diameter than the bush insertion hole 16 of the inner link plate 12, and the bush 17 is inserted through the insertion hole 32c. In this case, since the pin 20 is inserted through the bush 17, the second absorbent member 32 is penetrated by the bush 17 and the pin 20.

  The second absorbent member 32 is in contact with both the inner side surface 31b of the first absorbent member 31 and the outer side surface 12a of the inner link plate 12 in a state of surrounding the outer periphery of the bushing 17, and is formed between the inner side surface 31b and the outer side surface 12a. A seal portion 32d for sealing the gap is provided. A gap S is formed between the seal portion 32 d (insertion hole 32 c) and the outer peripheral surface 17 c of the bush 17.

Next, the operation of the absorbent material 19 when the chain 11 is used will be described.
When the chain 11 is used, the inner link plate 12 and the outer link plate 14 are relatively rotated. At this time, it slides between the outer link plate 14 and the first absorbent 31, slides between the inner link plate 12 and the second absorbent 32, or between the first absorbent 31 and the second absorbent 32. For example, the first absorbent 31 and the second absorbent 32 may be worn and damaged.

  However, in this embodiment, since the absorbent 19 disposed between the inner link plate 12 and the outer link plate 14 includes the first absorbent 31 and the second absorbent 32, the first absorbent 31 and Even if one of the second absorbent members 32 is damaged, the other can seal between the inner link plate 12 and the outer link plate 14.

  In addition, when the lubricant between the inner peripheral surface 17a of the bush 17 and the outer peripheral surface 20a of the pin 20 leaks to the outside of the chain 11 during use of the chain 11, the lubricant is separated from the end surface 17b of the bush 17. The first absorbent 31 (intervening part 31 c) flows into the gap S through a slight gap between the first absorbent 31 (intervening part 31 c) and is temporarily stored in the gap S. At this time, a part of the lubricant is absorbed and held by the first absorbent material 31. Since the lubricant is relatively easily absorbed between the first absorbent 31 and the second absorbent 32, the lubricant temporarily stored in the gap S is mainly the second absorbent 32. It leaks out of the chain 11 through the space between the inner side surface 32a of the inner link plate 12 and the outer side surface 12a of the inner link plate 12.

  As described above, the leakage path of the lubricant from the inside of the chain 11 to the outside has a crank shape (so-called labyrinth structure) in a cross-sectional view as indicated by a broken arrow in FIG. For this reason, since it becomes difficult to leak a lubricant compared with the past, the leakage of the lubricant from the inside of the chain 11 to the outside is effectively suppressed.

  Moreover, since the to-be-mounted part 31c of the 1st absorber 31 is in the position where the distance from the inner peripheral surface 17a of the bush 17 and the outer peripheral surface 20a of the pin 20 is near compared with the former, it is the 1st absorber. The lubricant absorbed and held by 31 is efficiently supplied between the inner peripheral surface 17a of the bush 17 and the outer peripheral surface 20a of the pin 20 from the interposed portion 31c. Therefore, the lubricant is efficiently held between the inner peripheral surface 17 a of the bush 17 and the outer peripheral surface 20 a of the pin 20.

According to the embodiment detailed above, the following effects are exhibited.
(1) The first absorbent 31 constituting the absorbent 19 is penetrated by the pin 20 and is interposed between the inner side surface 14a of the outer link plate 14 and the end surface 17b of the bush 17. Since it has 31c, it arrange | positions so that the to-be-inserted part 31c (1st absorber 31) may contact a pin in the position near from between the pin 20 and the bush 17 compared with the past. Therefore, the lubricant leaking from between the pin 20 and the bush 17 is absorbed by the first absorbent 31, or the lubricant absorbed by the first absorbent 31 is supplied again between the pin 20 and the bush 17. Can be performed efficiently. Therefore, the lubricant can be efficiently held between the pin 20 and the bush 17.

  (2) The second absorbent 32 constituting the absorbent 19 is in contact with both the inner surface 31b of the first absorbent 31 and the outer surface 12a of the inner link plate 12 in a state of surrounding the outer periphery of the bush 17. A seal portion 32d that seals between the inner surface 31b and the outer surface 12a is provided. For this reason, it can suppress effectively that the lubricant between the pin 20 and the bush 17 leaks outside through the space between the inner surface 31b and the outer surface 12a.

  (3) The absorbent material 19 includes a first absorbent material 31 having an intervening portion 31c, and a second absorbent material 32 that is configured separately from the first absorbent material 31 and has a seal portion 32d. . For this reason, even when one of the first absorbent material 31 and the second absorbent material 32 is damaged, leakage of the lubricant to the outside from between the pin 20 and the bush 17 can be suppressed by the other.

  (4) The first absorbent material 31 and the second absorbent material 32 are in contact with each other in a partially overlapping state in the width direction Y. For this reason, the sealing performance with respect to the lubricant when the lubricant between the pin 20 and the bush 17 leaks to the outside can be improved.

  (5) A gap S is formed between the seal portion 32 d of the second absorbent material 32 and the outer peripheral surface 17 c of the bush 17. For this reason, the lubricant that is about to leak from between the pin 20 and the bush 17 can be stored in the gap S.

  (6) Since two absorbent materials (the first absorbent material 31 and the second absorbent material 32) are arranged between the outer side surface 12a of the inner link plate 12 and the inner side surface 14a of the outer link plate 14, absorption is performed. Compared with the case of one material, the amount of lubricant held by the chain 11 before use can be increased.

(Example of change)
In addition, you may change the said embodiment as follows.
As shown in FIG. 3, the second absorbent member 32 may be omitted, and an annular protrusion 31 d into which the end of the bush 17 is inserted may be provided on the inner side surface 31 b of the first absorbent member 31. .

As shown in FIG. 4, the gap S may be omitted by reducing the diameter of the insertion hole 32 c of the second absorbent material 32.
-As shown in FIG. 5, you may make it comprise the absorber 19 by what formed the 1st absorber 31 and the 2nd absorber 32 integrally.

-The 1st absorber 31 and the 2nd absorber 32 do not necessarily need to be in the state where a part overlapped in the width direction Y.
-The 2nd absorber 32 may be omitted.

The roller 18 may be omitted.
The chain 11 is a so-called so-called chain link in which a plurality of links that are curved so that the width of one end side in the series direction X of the two opposing link plates is narrower than the width of the other end side are rotatably connected by a bush 17 and a pin 20. It may be an offset type chain.

  DESCRIPTION OF SYMBOLS 11 ... Chain, 12 ... Inner link plate, 14 ... Outer link plate, 17 ... Bush, 19 ... Absorbent material, 20 ... Pin, 31 ... 1st absorber, 31c ... Interposed part, 32 ... 2nd absorber, 32d ... seal part, S ... gap.

Claims (5)

A pair of inner link plates that are spaced apart from each other;
Cylindrical bushes that pass through the pair of inner link plates, and whose both ends protrude outside the pair of inner link plates,
A pin inserted into the bush;
A pair of outer link plates that are arranged so as to sandwich the pair of inner link plates from the outside, and through which both ends of the pins pass,
A chain comprising an absorbent material disposed between an outer surface of the inner link plate and an inner surface of the outer link plate and capable of absorbing a lubricant;
The absorbent core has a part to be interposed interposed between an inner side surface of the outer link plate and an end surface of the bush while being penetrated by the pin.   2. The chain according to claim 1, wherein the absorbent member has a seal portion that contacts an outer surface of the inner link plate in a state of surrounding the outer periphery of the bush. The absorbent material is
A first absorbent material having the interposed part;
The chain according to claim 2, wherein the chain is configured separately from the first absorbent material, and includes a second absorbent material having the seal portion.   4. The chain according to claim 3, wherein the first absorbent material and the second absorbent material are in contact with each other in a partially overlapping state in the extending direction of the pin.   The chain according to any one of claims 2 to 4, wherein a gap is formed between the seal portion and the outer peripheral surface of the bush.