JP6067271B2 - Sliding member - Google Patents

Description

  The present invention relates to a sliding contact member used in a sliding contact with a contacted portion.

  Conventionally, as such a sliding contact member, for example, a member used as a liner for a stabilizer bush is known (for example, Patent Document 1). In such a stabilizer bush, a cylindrical liner knitted with fibers is integrally provided on the entire inner peripheral surface of the circular shaft hole of the main rubber elastic body. Such a liner includes an inner layer that is in sliding contact with a stabilizer bar (contacted portion) that is inserted into the shaft hole, and an outer layer that is joined to the inner peripheral surface of the shaft hole during vulcanization molding of the main rubber elastic body. ing.

  That is, the inner layer of the liner consists of a knitted fabric knitted with fluororesin fibers having good sliding properties, while the outer layer of the liner consists of a knitted fabric knitted with polyester fibers. In this case, the liner is formed into a semi-cylindrical shape by rounding two rectangular materials formed by overlapping the separately formed inner layer and outer layer so that the inner layer is on the inner side. These end portions are sewn together to form a cylindrical shape.

JP 2007-237981 A

  By the way, the liner as described above has a two-layer structure of an inner layer and an outer layer made of a knitted fabric, and the inner layer and the outer layer are sewn only at two locations facing each other in the circumferential direction. There is a problem that the durability is insufficient and sufficient durability cannot be ensured.

  The present invention has been made paying attention to such problems existing in the prior art. The object is to provide a sliding member capable of sufficiently ensuring durability.

The sliding contact member that solves the above problem is a sliding contact member that is configured by a cylindrical fabric formed by weaving a plurality of yarns into a cylindrical shape, and is used in a state of sliding contact with a contacted portion. A first fabric layer, a second fabric layer laminated on the first fabric layer, a third fabric layer laminated on the second fabric layer, the first fabric layer and the second fabric layer. A first binding yarn that is woven to connect the first fabric layer and the second fabric layer, and is woven into the second fabric layer and the third fabric layer, A second binding thread that binds the third fabric layer , wherein the first fabric layer and the first binding thread are made of the same material, and the third fabric layer and the second binding thread. The yarn is made of the same material .

  According to the above configuration, since the fabric constituting the sliding contact member is a so-called triple fabric, the first fabric layer, the second fabric layer, and the third fabric layer are the first binding yarn and the second binding yarn. It is firmly connected by. Therefore, it is possible to sufficiently ensure the durability of the sliding contact member.

In the sliding contact member, it is preferable that the fabric is a tubular fabric formed by weaving a plurality of yarns in a tubular shape.
According to the above configuration, since the fabric is a cylindrical fabric, there is no seam in the circumferential direction. For this reason, it becomes possible to suppress that the tubular woven fabric frays from the seam.

  Normally, the first binding yarn is exposed on the surface of the first fabric layer, while the second binding yarn is exposed on the surface of the third fabric layer, so that the first fabric layer and the first binding yarn are There are the following problems if the third fabric layer and the second binding yarn are made of different materials while being made of different materials. That is, the first binding yarn reduces the slidability of the first fabric layer with respect to the contacted portion, regardless of which of the first fabric layer and the third fabric layer is in sliding contact with the contacted portion. Or the second binding yarn may reduce the slidability of the third fabric layer with respect to the contacted portion.
  In this regard, according to the above configuration, the first fabric layer and the first binding yarn are made of the same material, and the third fabric layer and the second binding yarn are made of the same material. For this reason, for example, even when the first fabric layer is brought into sliding contact with the contacted portion, the first binding yarn reduces the slidability of the first fabric layer with respect to the contacted portion. It is also possible to suppress the adhesiveness of the third fabric layer to the contacted portion from being lowered by the second binding yarn having high slidability.

  In the sliding contact member, it is preferable that one of the first fabric layer and the third fabric layer has higher slidability with respect to the contacted portion than the other.

  According to the said structure, it is possible to ensure the slidability with respect to a to-be-contacted part by making the slidable one of the 1st fabric layer and the 3rd woven fabric layer slidably with respect to a to-be-contacted part. Become. On the other hand, the adhesiveness can be ensured with a lower slidability.

  ADVANTAGE OF THE INVENTION According to this invention, the slidable contact member which can fully ensure durability can be provided.

The front view of the stabilizer bush in one Embodiment. The side view of FIG. The perspective view which shows the liner of the stabilizer bush. The partial expanded cross-section schematic diagram which shows the structure | tissue of the textile fabric which comprises the liner. Sectional drawing which shows the assembly | attachment state to the vehicle body side of the stabilizer bush.

  Hereinafter, an embodiment in which a sliding contact member is embodied in a liner provided in a stabilizer bush will be described with reference to the drawings. The stabilizer bush is a component that is mounted between a stabilizer bar provided in a suspension device of an automobile and a bracket on the vehicle body side.

  As shown in FIG. 1, the stabilizer bush 11 has a bush body 12 in which the upper half has a rectangular shape and the lower half has a semicircular shape when viewed from the axial direction X (the direction orthogonal to the paper surface in FIG. 1). It has. The bush main body 12 is made of a flexible material (in this embodiment, rubber). A circular shaft hole 13 that penetrates the bush body 12 in the axial direction X is formed at the center of the bush body 12.

  As shown in FIG. 2, a pair of flange portions 14 are formed at both ends in the axial direction X of the bush body 12. A recessed portion sandwiched between both flange portions 14 in the bush main body 12 is a mounting surface 15 on which a bracket 31 described later is mounted. Further, a cylindrical liner 16 as an example of a sliding contact member is provided in the shaft hole 13 of the bush main body 12 so as to cover the entire inner peripheral surface of the shaft hole 13.

  As shown in FIG. 1, a split portion 17 for fitting a stabilizer bar 30, which will be described later as an example of a contacted portion, into the shaft hole 13 is formed on the side portion of the stabilizer bush 11 over the entire axial direction X. Has been.

Next, the configuration of the liner 16 will be described in detail.
As shown in FIGS. 3 and 4, the liner 16 is constituted by a tubular woven fabric in which a plurality of yarns are made into a triple tubular weave. The first fabric layer 21, the second fabric layer 22, and the third fabric layer 23 are laminated in order from the inner side (lower side in FIG. 4) to the outer side (upper side in FIG. 4). It has a three-layer structure. That is, the second fabric layer 22 is laminated outside the first fabric layer 21, and the third fabric layer 23 is laminated outside the second fabric layer 22.

  As shown in FIG. 4, the first fabric layer 21 is formed by weaving a plurality of first warps 21a and a plurality of first wefts 21b, and the second fabric layer 22 is composed of a plurality of second warps 22a and a plurality of first wefts. Two weft yarns 22b are woven, and the third fabric layer 23 is woven with a plurality of third warp yarns 23a and a plurality of third weft yarns 23b. In this case, each of the fabric layers 21 to 23 may be a plain weave or a twill weave.

  Moreover, in this embodiment, the thread | yarn made from polytetrafluoroethylene (PTFE) which is 1 type of highly slidable fluororesin is used for the 1st warp 21a and 1st weft 21b which comprise the 1st fabric layer 21. FIG. ing. Furthermore, in this embodiment, the second warp yarn 22a and the second weft yarn 22b constituting the second fabric layer 22 and the third warp yarn 23a and the third weft yarn 23b constituting the third fabric layer 23 are a kind of polyester. Some polyethylene terephthalate (PET) yarns are used. Therefore, the first fabric layer 21 has significantly higher slidability with respect to the stabilizer bar 30 to be described later than the third fabric layer 23.

  As shown in FIG. 4, a plurality of first binding yarns 24 are connected to the first fabric layer 21 and the second fabric layer 22 so as to bind the first fabric layer 21 and the second fabric layer 22. Is interwoven. That is, each first binding yarn 24 is structured with each first warp yarn 21a and each second warp yarn 22a. In this case, for each first binding yarn 24, the same polytetrafluoroethylene yarn as the first warp yarn 21a and the first weft yarn 21b constituting the first fabric layer 21 is used. Therefore, each 1st binding yarn 24 and the 1st textile layer 21 are comprised with the same material.

  In addition, a plurality of second binding yarns 25 are woven into the second woven fabric layer 22 and the third woven fabric layer 23 so as to connect the second woven fabric layer 22 and the third woven fabric layer 23. . That is, each second binding yarn 25 is structured with each second warp 22a and each third warp 23a. In this case, for each second binding yarn 25, the same polytetrafluoroethylene yarn as the third warp yarn 23a and the third weft yarn 23b constituting the third fabric layer 23 is used. Therefore, each 2nd binding yarn 25 and the 3rd textile layer 23 are comprised with the same material.

  The stabilizer bush 11 shown in FIG. 1 is formed by inserting a cylindrical middle mold into the liner 16 and then setting it by sandwiching it with a mold, and injecting raw rubber into the mold cavity and vulcanizing it. The At this time, the third fabric layer 23 made of polyethylene terephthalate in the liner 16 is bonded to the shaft hole 13 of the bush body 12. For this reason, the liner 16 is firmly and integrally formed in the shaft hole 13 of the bush main body 12 as compared with the case where the third fabric layer 23 is made of polytetrafluoroethylene having high slidability.

Next, a method for attaching the stabilizer bush 11 to the vehicle body side and its operation will be described.
As shown in FIG. 5, when attaching the stabilizer bush 11 to the vehicle body side, first, the metal bush fixed to the suspension device (not shown) side of the vehicle with the cut portion 17 of the stabilizer bush 11 opened. The stabilizer bar 30 is fitted into a predetermined position. Subsequently, the stabilizer bush 11 is fastened and fixed to the mounted portion 32 on the vehicle body side with the bolt 33 and the nut 34 via the bracket 31.

  That is, the bracket 31 has a fitting portion 31a that is curved in a U shape in accordance with the mounting surface 15 of the stabilizer bush 11 at the center portion, and insertion holes (not shown) through which the bolts 33 are inserted at both ends. And the attached mounting portion 31b. Then, in a state in which the fitting portion 31a of the bracket 31 is fitted to the mounting surface 15 of the stabilizer bush 11, each attachment portion 31b of the bracket 31 is fixed to the attachment portion 32 on the vehicle body side by the bolt 33 and the nut 34. . Thereby, the stabilizer bush 11 is attached to the vehicle body side.

  As described above, by mounting the stabilizer bush 11 between the stabilizer bar 30 and the bracket 31, even if vibration is generated on the suspension device (not shown) side, the generated vibration is absorbed by the stabilizer bush 11. . For this reason, propagation of vibration from the suspension device (not shown) side to the vehicle body side is suppressed. Moreover, since the inner peripheral surface of the liner 16 of the stabilizer bush 11 is constituted by the first woven fabric layer 21 made of polytetrafluoroethylene having high slidability, the stabilizer bar 30 slides smoothly.

  For this reason, while the stabilizer bush 11 suppresses that the movement of the stabilizer bar 30 is suppressed, the liner 16 suppresses generation | occurrence | production of the noise by friction with the rubber bush main bodies 12 and the metal stabilizer bars 30. .

According to the embodiment detailed above, the following effects are exhibited.
(1) Since the woven fabric constituting the liner 16 of the stabilizer bush 11 is a so-called triple woven fabric, the first woven fabric layer 21, the second woven fabric layer 22, and the third woven fabric layer 23 include the first binding yarn 24 and the first woven fabric 24. The two binding yarns 25 are firmly connected. Therefore, the durability of the liner 16 can be improved compared to the conventional case. That is, the durability of the liner 16 can be sufficiently ensured, and as a result, the durability of the stabilizer bush 11 can be sufficiently ensured.

(2) Since the liner 16 is made of a tubular woven fabric, there is no seam in the circumferential direction. For this reason, fraying from the joint of the liner 16 can be suppressed.
(3) The stabilizer bush 11 is used in a state in which the first fabric layer 21 having a higher slidability with respect to the stabilizer bar 30 than the third fabric layer 23 is in sliding contact with the stabilizer bar 30. For this reason, sufficient slidability with respect to the stabilizer bar 30 of the stabilizer bush 11 is securable.

  (4) In the liner 16 having the configuration of the embodiment, the first binding yarn 24 is exposed on the surface of the first fabric layer 21 (the inner peripheral surface of the liner 16), while the surface of the third fabric layer 23 (the outer periphery of the liner). The second binding yarn 25 is exposed on the surface). For this reason, for example, when the first fabric layer 21 and the first binding yarn 24 are made of different materials, and the third fabric layer 23 and the second binding yarn 25 are made of different materials, There are the following problems.

  That is, when the first fabric layer 21 is made of polytetrafluoroethylene having relatively high slidability and the first binding yarn 24 is made of polyethylene terephthalate having relatively low slidability, The first binding yarn 24 exposed on the inner peripheral surface of the first fabric layer 21 comes into contact with the stabilizer bar 30. For this reason, there exists a problem that the slidability with respect to the stabilizer bar 30 of the liner 16 will be reduced.

  On the other hand, the third fabric layer 23 is made of polyethylene terephthalate having a relatively high adhesiveness to the rubber constituting the bush body 12 and the second binding yarn 25 is made of the rubber constituting the bush body 12 relatively. If it is made of polytetrafluoroethylene having a low adhesiveness, the adhesiveness between the bush body 12 and the third fabric layer 23 will be lowered. That is, when the bush body 12 is vulcanized, the second binding yarn 25 exposed on the outer peripheral surface of the third fabric layer 23 of the liner 16 reduces the adhesion between the liner 16 and the bush body 12. There is.

  In this regard, the liner 16 of the present embodiment is made of polytetrafluoroethylene in which the first fabric layer 21 and the first binding yarn 24 are the same material, and the third fabric layer 23 and the second binding yarn 25 are Are made of polyethylene terephthalate, which is the same material. For this reason, the adhesiveness of the bush main body 12 and the liner 16 at the time of the vulcanization molding of the bush main body 12 can be ensured while ensuring the slidability of the liner 16 with respect to the stabilizer bar 30.

(Example of change)
In addition, the said embodiment can also be changed and actualized as follows.
In the liner 16, each of the second weft yarns 22 b of the second fabric layer 22 and each of the third weft yarns 23 b of the third fabric layer 23 may be at least partially made of hot melt yarn. As a method for making a part of this hot melt yarn, a method in which the hot melt yarn is pre-twisted with each second weft yarn 22b and each third weft yarn 23b can be considered. In this case, the twist ratio of the respective hot melt yarns with respect to each of the second weft yarns 22b and each of the third weft yarns 23b can be appropriately changed according to the use, and all may be hot melt yarns. If it does in this way, the liner 16 whole can be strengthened, without affecting the 1st textile layer 21, by giving heat to the liner 16 and melting a hot melt yarn. Moreover, when the liner 16 is heat-cut by making at least a part of each of the second weft yarns 22b and each of the third weft yarns 23b hot-cut, it is possible to make the cut surface difficult to fray.

  In the liner 16, at least a part of each second warp 22a of the second fabric layer 22 may be a hot melt yarn. As a method for making this part a hot melt yarn, a method of pre-twisting the hot melt yarn with respect to each second warp yarn 22a can be considered. In this case, the twisting ratio of the hot melt yarn with respect to each second warp yarn 22a can be appropriately changed according to the application, and all may be the hot melt yarn. By doing so, the liner 16 can be strengthened without affecting the first fabric layer 21 and the third fabric layer 23 by applying heat to the liner 16 to melt the hot melt yarn. .

  -At least a part of each second warp yarn 22a and each second weft yarn 22b of the second fabric layer 22 may be a hot melt yarn. By doing so, the liner 16 can be strengthened as compared with the case where the hot melt yarn is twisted and heat-melted on one of the second warp yarns 22a and the second weft yarns 22b.

-In the liner 16, you may make it provide electroconductivity to each textile layer 21-23 and each binding yarn 24,25 separately suitably.
-You may make it comprise a sliding contact member with the flat fabric instead of the cylindrical fabric which comprises the liner 16 like embodiment. If it does in this way, a slidable contact member can be used as a pad attached to the contact part with the floor (contacted part) in the suction tool of a vacuum cleaner, for example.

-You may make it use the cylindrical fabric which comprises the liner 16 as a bearing of the rotating shaft which various machines and apparatuses have.
-You may make the slidability with respect to the to-be-contacted part of the 1st fabric layer 21 and the 3rd fabric layer 23 the same. That is, the material constituting the first fabric layer 21 and the material constituting the third fabric layer 23 may be the same.

  In the liner 16, the first fabric layer 21 and the first binding yarn 24 do not necessarily have to be made of the same material, and the third fabric layer 23 and the second binding yarn 25 have to be necessarily made of the same material. Nor.

  Each fabric layer 21 to 23 and each binding yarn 24 and 25 may be made of a material other than polytetrafluoroethylene or polyethylene terephthalate, such as polypropylene or polyamide.

Further, the technical idea that can be grasped from the above embodiment will be described below.
(A) The first fabric layer is woven from a first warp and a first weft, the second fabric layer is woven from a second warp and a second weft, and the third fabric layer is A third warp and a third weft are woven, the first binding yarn is organized with the first warp and the second warp, and the second binding yarn is the second warp and the third weft. The sliding contact member according to any one of claims 1 to 4, wherein the sliding contact member is structured with warp yarns.

  16 ... liner as an example of sliding contact member, 21 ... first fabric layer, 22 ... second fabric layer, 23 ... third fabric layer, 24 ... first binding yarn, 25 ... second binding yarn, 30 ... Stabilizer bar as an example of contacted part.

Claims (2)

A sliding contact member composed of a cylindrical fabric formed by weaving a plurality of yarns into a cylindrical shape and used in a state of sliding contact with a contacted portion,
The fabric is
A first fabric layer;
A second fabric layer laminated to the first fabric layer;
A third fabric layer laminated to the second fabric layer;
A first binding yarn that is woven into the first fabric layer and the second fabric layer, and connects the first fabric layer and the second fabric layer;
A second binding yarn that is woven into the second fabric layer and the third fabric layer and connects the second fabric layer and the third fabric layer ;
The first fabric layer and the first binding yarn are made of the same material,
The sliding contact member, wherein the third fabric layer and the second binding yarn are made of the same material .   The sliding contact member according to claim 1, wherein one of the first fabric layer and the third fabric layer has a higher slidability with respect to the contacted portion than the other.