Hose mouthpiece

Abstract

To provide a hose mouthpiece capable of improving rotation strength.SOLUTION: The hose mouthpiece 1 includes a cylindrical socket 11, and a nipple 14 fixed concentrically with the socket 11 inside the socket 11. An inner groove side 11b parallel to the axial direction of the socket 11 is formed on the inner surface of the socket 11. The hose 2 fitted to the 11a of an insertion part formed between the socket 11 and the nipples 14 is connected by caulking the socket 11. The first swaged portion 111 to be swaged includes at least a part of the inner groove 11b extending in the axial direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a hose barb used for connecting a resin hose. [Background technology]

[0002] This type of hose barb typically has a cylindrical socket with a nipple formed inside the socket, the nipple having a flow path in the center for oil, etc. The hose is fitted into the annular space formed between the socket and the nipple, and the socket is crimped to connect the hose and barb.

[0003] In such a fitting, in order to improve the ease of pulling out the hose, it is common to provide grooves around the inner peripheral surface of the socket and form an uneven surface in the axial direction at the crimped portion. For example, in Patent Document 1, a coil spring-like wire is arranged inside the crimped portion of the socket (sleeve in Patent Document 1), and unevenness is formed on the inner peripheral surface of the sleeve due to the stress generated during crimping. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 63-152087 Summary of the Invention [Problem to be solved by the invention]

[0005] When a resin hose or the like is connected to such a hose barb, it is important that the position of the hose relative to the hose barb is fixed and does not move in the rotational direction.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a hose barb that can improve rotational strength. [Means for solving the problem]

[0007] The hose barb fitting of the present invention comprises a cylindrical socket and a nipple fixed concentrically to the inside of the socket, the nipple having a flow path formed in its center. An inner groove parallel to the axial direction of the socket is formed on the inner wall surface of the socket. A plastic hose fitted into an annular space formed between the socket and the nipple is connected by crimping the socket. The region where the crimping is performed includes at least a portion of the inner groove extending in the axial direction.

[0008] According to the above configuration, an inner groove parallel to the axial direction of the socket is formed on the inner wall surface of the socket. By crimping the annular space including at least a portion of this inner groove, the plastic hose between the socket and the nipple is compressed and enters the multiple grooves. This makes it possible to reduce the plastic hose from being rotated in the circumferential direction.

[0009] The hose barb fitting of the present invention comprises a cylindrical socket and a nipple fixed concentrically to the inside of the socket, the nipple having a flow path formed in its center. An inner spiral groove extending in the axial direction of the socket is formed on the inner wall surface of the socket. An outer groove is provided around the outer wall surface of the nipple. A plastic hose fitted into an annular space formed between the socket and the nipple is connected by crimping the socket. The region of the socket where the crimping is performed includes at least a portion of the axially extending spiral inner groove and the outer groove.

[0010] According to the above configuration, a spiral groove extending in the axial direction of the socket is formed on the inner wall surface of the socket. Furthermore, an outer groove is provided around the outer wall surface of the nipple. By crimping at least a portion of this spiral groove and an annular space including at least a portion of the outer groove, the plastic hose present between the socket and the nipple is compressed and enters the multiple inner and outer grooves. Entering the plastic hose into the outer groove improves the strength of the plastic hose in the tensile direction. Furthermore, by improving the strength of the plastic hose in the tensile direction, movement of the plastic hose along the spiral inner groove is restricted, thereby reducing circumferential rotation of the plastic hose. [Effects of the Invention]

[0011] According to the present invention, a hose barb fitting capable of improving rotational strength is provided. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a partial cross-sectional view of a hose barb 1 according to a first embodiment. [Figure 2] 2 is a cross-sectional view taken along line II-II of the socket 11 of the hose barb fitting 1 in FIG. 1, viewed from the axial direction. [Figure 3] 2 is a cross-sectional view showing an example of the hose barb 1 of FIG. 1 after being crimped. FIG. [Figure 4] FIG. 10 is a partial cross-sectional view of a hose barb fitting 201 according to a second embodiment. [Figure 5] FIG. 5 is a cross-sectional view showing an example of the hose barb fitting 201 of FIG. 4 being crimped. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0014] [First embodiment] As shown in Fig. 1, the hose barb fitting 1 of this embodiment is an eye joint. For example, one end of the hose barb fitting 1 is connected to a brake caliper, and the other end is connected to a brake hose. The hose barb fitting 1 is fixed to the brake caliper, for example, by a bolt inserted into a ring portion 12 (described later) of the hose barb fitting 1. Fig. 1 shows the hose barb fitting 1 before it is crimped.

[0015] As shown in FIGS. 1 and 2, the hose barb 1 has a cylindrical socket 11, an annular portion 12, a neck portion 13, and a nipple 14.

[0016] The socket 11 is provided at one end of the hose barb 1. The socket 11 has an insertion portion 11a provided therein. The insertion portion 11a is an annular space formed between the socket 11 and the nipple 14 and has a tubular shape. The socket 11 and the insertion portion 11a have the same axis. An inner groove 11b is formed on the inner wall surface of the socket 11, which is parallel to the axial direction of the socket 11.

[0017] The inner groove 11b is formed to improve the rotational strength of the connected resin hose 2 (described later). The inner groove 11b extends from the tip to the center of the socket 11. At least a portion of the inner groove 11b has a region that overlaps with the nipple 14 in the axial direction. Note that the inner groove 11b does not have to be formed from the tip of the socket 11.

[0018] The number of inner grooves 11b may be one or more. When multiple inner grooves 11b are provided as shown in Fig. 2, the inner grooves 11b may be evenly arranged in the circumferential direction of the socket 11. For example, in the example of Fig. 2, eight inner grooves 11b are evenly arranged in the socket 11.

[0019] The annular portion 12 is provided at the other end of the hose barb fitting 1. The annular portion 12 is an annular member having a through hole 12b through which a bolt for fixing is inserted. The annular portion 12 has a driving hole 12a that penetrates the side wall surface of the annular portion 12, approximately in the center between its upper and lower surfaces. The tip of the neck portion 13 is driven into the driving hole 12a, and the two parts are joined by copper brazing.

[0020] Neck portion 13 has a cylindrical shape that is thinner than socket 11, which is integrally formed with neck portion 13, and has a communication hole 13a formed therein. As described above, the tip of neck portion 13 is driven into driving hole 12a of annular portion 12, thereby connecting socket 11 and annular portion 12.

[0021] The nipple 14 is a cylindrical member whose outer diameter is formed to match the communication hole 13a, and a fluid hole 14a is formed therein. The tip of the nipple 14 is driven into the communication hole 13a, and this portion is joined by copper brazing. As a result, the fluid hole 14a of the nipple 14 is communicated with the through hole 12b formed in the annular portion 12 via the communication hole 13a. Furthermore, since the socket 11 is configured into a socket shape by joining the nipple 14, it is possible to insert and connect a hose such as a brake hose into the insertion portion 11a. The nipple 14 has an outer groove 14b formed around its outer wall surface. There may be one outer groove 14b, or multiple outer grooves 14b. The outer groove 14b may or may not have a region that overlaps with the inner groove 11b of the socket 11 in the axial direction.

[0022] The socket 11, annular portion 12, neck portion 13, and nipple 14 are configured so that the axis of insertion portion 11a provided in socket 11, the axis of driving hole 12a provided in annular portion 12 and communication hole 13a provided in neck portion 13, and the axis of fluid hole 14a provided in nipple 14 are aligned. In this way, nipple 14 is fixed inside socket 11 concentrically with socket 11, and fluid hole 14a is formed in the center as a flow path.

[0023] The above-described hose barb fitting 1 is connected to the end of a resin hose 2 (described later) such as a brake hose. For example, the end of the resin hose 2 is inserted into the insertion portion 11a of the socket 11, and while the resin hose 2 is held by a nipple 14 provided inside the socket 11, the socket 11 is crimped to reduce the diameter, thereby connecting the hose barb fitting 1 to the end of the brake hose. The resin hose 2 may be made of fluororesin, polyamide, polyester, or the like, and may have a reinforcing layer made of braided stainless steel wire.

[0024] Specifically, an example of a hose barb fitting 1 that has been subjected to crimping processing will be described. For example, in the example shown in FIG. 3, two crimped regions (a first crimped portion 111 and a second crimped portion 112) of the socket 11 are crimped from several locations around the periphery in a centripetal direction as indicated by the arrows to connect the resin hose 2. Of the two crimped regions, the first crimped portion 111 is the region on the side where the resin hose 2 extends. The first crimped portion 111 includes a portion of the inner groove 11b extending in the axial direction. In this manner, by crimping the insertion portion 11a (see FIG. 1) including the inner groove 11b, the resin hose 2 present between the socket 11 and the nipple 14 is compressed and enters the inner groove 11b (see FIG. 2). The resin hose 2 entering the inner groove 11b acts as a claw that restricts rotation, improving rotational strength.

[0025] 3, the first crimped portion 111 includes the outer groove 14b of the nipple 14 in addition to the inner groove 11b. As a result, the resin hose 2 enters the outer groove 14b, thereby improving the strength of the resin hose 2 in the tensile direction.

[0026] Furthermore, the second crimped portion 112 does not include an inner groove 11b extending in the axial direction, but includes an outer groove 14b of the nipple 14. Because the inner groove 11b is a groove provided in the axial direction, it improves rotational strength but may reduce sealing performance. As shown in the example of Figure 3, the second crimped portion 112, which is closer to the annular portion 12 (see Figure 1) than the first crimped portion 111, does not include the inner groove 11b, thereby reducing the reduction in sealing performance.

[0027] In the example of FIG. 3, socket 11 is provided with two crimped regions, but this is not limiting. For example, there may be one crimped region. There may also be three or more crimped regions, and for example, one of the crimped regions may not include either inner groove 11b or outer groove 14b. In the above example, first crimped portion 111 includes both inner groove 11b and outer groove 14b, but this is not limiting and it may not include outer groove 14b.

[0028] [Second embodiment] Next, a hose barb fitting 201 of a second embodiment will be described with reference to the drawings. Note that a description of the configuration common to the first embodiment and the effects achieved thereby will be omitted, and the following mainly describes the differences from the first embodiment. Note that the same members as in the first embodiment are assigned the same reference numerals as in the first embodiment.

[0029] As shown in FIG. 4, a hose barb 201 of this embodiment has a socket 11, an annular portion 12, a neck portion 13, and a nipple 14 similar to those of the first embodiment.

[0030] The socket 11 is provided at one end of the hose barb fitting 201. The socket 11 does not have the inner groove 11b of the first embodiment, but has a spiral inner groove 11b2 formed on its inner wall surface, extending in the axial direction of the socket 11. In this embodiment, the inner groove 11b2 is a threaded groove cut into a concave shape on the inner wall surface. The inner groove 11b2 may also be formed by a screw thread formed on the inner wall surface. Furthermore, the inner groove 11b2 does not have to be a threaded groove as long as it is spiral. The inner groove 11b2 extends from the tip to the center of the socket 11. At least a portion of the inner groove 11b2 has a region that overlaps with the nipple 14 in the axial direction.

[0031] As in the first embodiment, the nipple 14 has an outer groove 14b formed around the outer wall surface. The outer groove 14b may be one or more. The outer groove 14b has an area that overlaps with the inner groove 11b2 of the socket 11 in the axial direction.

[0032] Specifically, an example of a hose barb fitting 201 that has been crimped will be described. For example, in the example of Fig. 5, the crimped region (crimped portion 211) in the center of the socket 11 is crimped from several points on the outer periphery in a centripetal direction as indicated by the arrows to connect the resin hose 2. The crimped portion 211 includes at least a part of the spiral inner groove 11b2 extending in the axial direction, and also includes the outer groove 14b.

[0033] In this way, by crimping at least a portion of the inner groove 11b2 and the insertion portion 11a (see FIG. 1) including the outer groove 14b, the resin hose 2 present between the socket 11 and the nipple 14 is compressed and enters the inner groove 11b2 and the outer groove 14b. First, by the resin hose 2 entering the outer groove 14b, the strength of the resin hose 2 in the tensile direction is improved. Furthermore, by improving the strength of the resin hose 2 in the tensile direction, movement of the resin hose 2 along the spiral inner groove 11b2 is restricted, making it possible to reduce rotation of the resin hose 2 in the circumferential direction.

[0034] In the example of FIG. 5, the socket 11 has one crimped region, but this is not limiting. For example, two or more crimped regions may be provided. For example, an area that does not include the inner groove 11b2 may be crimped on the annular portion 12 side of the crimped portion 211. This can improve sealing performance. Furthermore, this crimped region may or may not include the outer groove 14b.

[0035] The above has described the hose barb fitting 1 and the hose barb fitting 201 according to one embodiment of the present invention. From the above description, the following technical features have been disclosed for the hose barb fitting 1 and the hose barb fitting 201.

[0036] As shown in Fig. 1, the hose barb fitting 1 of this embodiment includes a cylindrical socket 11 and a nipple 14 fixed concentrically to the inside of the socket 11, the nipple 14 having a fluid hole 14a formed in the center as a flow path. An inner groove 11b parallel to the axial direction of the socket 11 is formed on the inner wall surface of the socket 11. A resin hose 2 is fitted into the insertion portion 11a, which is an annular space formed between the socket 11 and the nipple 14, and is connected by crimping the socket 11. A first crimping portion 111 where crimping is performed includes at least a portion of the inner groove 11b extending in the axial direction.

[0037] According to the above configuration, an inner groove 11b parallel to the axial direction of the socket 11 is formed on the inner wall surface of the socket 11. When the insertion portion 11a, which is an annular space including at least a part of this inner groove 11b, is crimped, the plastic hose 2 present between the socket 11 and the nipple 14 is compressed and enters the inner groove 11b. This makes it possible to reduce the plastic hose 2 from being rotated in the circumferential direction.

[0038] As shown in FIG. 3, the hose barb fitting 1 of this embodiment has an outer groove 14b formed around the outer wall surface of the nipple 14, and the first crimping portion 111, which is the area where crimping is performed, includes the outer groove 14b.

[0039] According to the above configuration, by crimping an area including at least a part of the outer groove 14b, the resin hose 2 present between the socket 11 and the nipple 14 is compressed and enters the outer groove 14b. By the resin hose 2 entering the outer groove 14b, the strength of the resin hose 2 in the tensile direction can be improved.

[0040] Furthermore, the hose barb 1 of this embodiment is provided with a plurality of inner grooves 11b, which are evenly arranged in the circumferential direction of the socket 11, as shown in FIG.

[0041] According to the above configuration, the inner grooves 11b are evenly arranged in the circumferential direction of the socket 11, which allows the resin hose 2 to be evenly inserted into the inner grooves 11b when the socket 11 is tightened. This reduces distortion of the rotation strength depending on the location.

[0042] 4, the hose barb fitting 201 of this embodiment includes a cylindrical socket 11 and a nipple 14 fixed concentrically to the inside of the socket 11, the nipple 14 having a fluid hole 14a formed in the center as a flow path. A spiral inner groove 11b2 extending in the axial direction of the socket 11 is formed on the inner wall surface of the socket 11. An outer groove 14b is provided around the outer wall surface of the nipple 14. A resin hose 2 is fitted into the insertion portion 11a, which is an annular space formed between the socket 11 and the nipple 14, and is connected by crimping the socket 11. In the socket 11, a crimping portion 211 where crimping is performed includes at least a portion of the spiral inner groove 11b2 extending in the axial direction and the outer groove 14b.

[0043] According to the above configuration, a spiral inner groove 11b2 extending in the axial direction of the socket 11 is formed on the inner wall surface of the socket 11. Furthermore, an outer groove 14b is provided around the outer wall surface of the nipple 14. When at least a portion of this spiral inner groove 11b2 and the insertion portion 11a, which is an annular space including at least a portion of the outer groove 14b, are crimped, the resin hose 2 present between the socket 11 and the nipple 14 is compressed and enters the inner groove 11b2 and the outer groove 14b. Entering the resin hose 2 into the outer groove 14b improves the strength of the resin hose 2 in the tensile direction. Furthermore, improving the strength of the resin hose 2 in the tensile direction restricts the resin hose 2 from moving along the spiral inner groove 11b2, thereby reducing the possibility of the resin hose 2 rotating in the circumferential direction.

[0044] In addition, as shown in FIG. 3, in the hose barb fitting 1 of this embodiment, the socket 11 has a second crimped portion 112 as a second region where additional crimping is performed, and the second crimped portion 112 does not include the inner groove 11b.

[0045] According to the above configuration, socket 11 is crimped at multiple locations and connected to resin hose 2. Of the crimped areas, at least second crimped portion 112 does not include inner groove 11b. Since inner groove 11b is a groove provided in the axial direction, providing crimped locations that do not include inner groove 11b can reduce deterioration in sealing performance due to inner groove 11b.

[0046] Although examples of the present invention have been described above, they are merely illustrative examples and do not particularly limit the present invention, and specific configurations, etc., can be appropriately modified in design. Furthermore, the actions and effects described in the embodiments of the invention are merely a list of the most preferable actions and effects resulting from the present invention, and the actions and effects of the present invention are not limited to those described in the embodiments of the present invention. [Explanation of symbols]

[0047] 1: Hose fitting 2: Resin hose 11: Socket 11a: Insertion section (annular space) 11b: Inner groove 11b2: Inner groove 12: Annular part 12a: Driving hole 12b: Through hole 13: Neck 13a: Communication hole 14: Nipple 14a:Fluid hole 14b: Outer groove 111: 1st caulking part 112:Second caulking part 201: Hose fitting 211: Caulking part

Claims

1. A cylindrical socket; a nipple fixed concentrically to the inside of the socket, the nipple having a flow path formed in the center thereof; An inner groove parallel to the axial direction of the socket is formed on an inner wall surface of the socket, a resin hose fitted into an annular space formed between the socket and the nipple is connected by crimping the socket; The region where the crimping is performed includes at least a part of the inner groove extending in the axial direction. Hose barb fittings.

2. 2. The hose barb fitting according to claim 1, An outer groove is formed around the outer wall surface of the nipple, The region where the crimping is performed includes the outer groove. Hose barb fittings.

3. The hose barb fitting according to claim 1 or 2, A plurality of the inner grooves are provided and are evenly arranged in the circumferential direction of the socket. Hose barb fittings.

4. A cylindrical socket; a nipple fixed concentrically to the inside of the socket, the nipple having a flow path formed in the center thereof; an inner wall surface of the socket is formed with a spiral inner groove extending in the axial direction of the socket; An outer groove is formed around the outer wall surface of the nipple, a resin hose fitted into an annular space formed between the socket and the nipple is connected by crimping the socket; The region where the crimping is performed includes at least a part of the spiral inner groove extending in the axial direction and the outer groove. Hose barb fittings.

5. 5. A hose barb fitting according to claim 1, 2 or 4, The socket has a second region where crimping is performed separately from the first region, The second region does not include the inner groove. Hose barb fittings.

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