JP4396964B2 - Hose reinforcement ring - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reinforcing ring for an air intake hose that is used to suppress expansion of the air intake hose due to supercharging pressure.
[0002]
[Prior art]
As shown in FIG. 6, in order to further increase the charging efficiency of the air supplied to the supercharger 2 and the compressor 2c of the supercharger 2, a so-called “intercooler turbocharger comprising an intercooler 3 for cooling the intake air is provided. In the engine 1 of “specifications”, an air intake hose (intercooler hose) H having a bellows portion is used to connect the compressor 2 c and the intercooler 3 of the supercharger 2, and the intercooler 3 and the intake manifold 4.
[0003]
That is, the engine 1 having a large vibration and the intercooler 3 supported separately from the engine on the chassis side have a relative movement, and the intercooler hose H having high flexibility is required.
[0004]
While the engine 1 is in operation, high-pressure air pressurized by the turbocharger compressor 2c flows in the intercooler hose H. Furthermore, the intercooler hose H is repeatedly expanded and contracted with fluctuations in the supercharging pressure of the turbocharger 2, leading to a shortened life of the hose H. A sound may be generated from the hose H by expansion / contraction.
[0005]
In order to deal with such a problem, in the prior art, as shown in FIGS. 7 to 9, a single wire hose reinforcing ring R made of steel is fitted into the bellows valley V of the intercooler hose H, and the inter The expansion / contraction of the cooler hose H has been suppressed.
7 shows the hose reinforcing ring R fitted in the intercooler hose H, FIG. 8 shows the XX cross section of FIG. 7, and FIG. 9 is a front view of an example of the hose reinforcing ring. It is shown.
In FIG. 8, the code | symbol 51 shows the bellows part of the intercooler hose, and the code | symbol Rj of FIG. 9 shows the connection location which connected the single wire of steel in the ring shape, for example by welding.
[0006]
However, an intercooler hose that is straight before vehicle assembly may need to be bent when assembled, and the hose bent portion tends to have a flat cross section when the hose is bent.
On the other hand, the single-wire reinforcing ring R made of steel has high rigidity and strength and is effective in suppressing the expansion of the intercooler hose H, but lacks flexibility, so the hose is bent as described above. Can not follow the flattening of the hose.
[0007]
For this purpose, it has been proposed to use, as a main material of the reinforcing ring for the hose, a plurality of single-stranded strands formed by twisting a plurality of steel wires and further twisted to further twist.
[0008]
As a method of connecting the double stranded wires 63 in a ring shape, a cylindrical connection member 70 is used as shown in FIG.
That is, from both ends of the connecting member 70, both end portions of the double stranded wire 63 are inserted into the hollow portions 74 of the connecting member 70, respectively, and at both ends of the hollow portion 74, both ends of the double stranded wire 63 are brought into contact with each other. Thereafter, the outer periphery of the connecting member 70 is crimped by a known means to form the hose reinforcing ring 6J.
[0009]
However, the hollow portion 74 of the connecting member 70 has a simple smooth circular cross section. For example, even if crimped from the outer peripheral side of the connecting member 70, the double-stranded wire 63 inserted into the hollow portion 74 is When a strong pulling force is applied along with the expansion and flattening of the hose, slippage occurs between the wall surface in the hollow portion 74 and the double stranded wire 63 that is the ring material, and the double stranded wire 63 is pulled out of the hollow portion 74. There was a problem of being overtaken.
[0010]
Also, in order to suppress vibration of the intake hose that communicates between the engine and the air cleaner, etc., a fastening member provided in the clamp by combining a clamp formed with a circular member with a circular cross section on the outer periphery of the bellows portion of the intake hose There is a technique for tightening the outer periphery of the intake hose (see, for example, Patent Document 1).
[0011]
However, although the above method suppresses vibration of the hose due to the pulsation of the intake air and further reduces the indoor noise, the structure of the entire hose becomes complicated, increasing the cost and increasing the man-hours for assembly. I have a problem.
[0012]
[Patent Document 1]
Registered Utility Model No. 2587971 (Page 1-2, Fig. 1)
[0013]
[Problems to be solved by the invention]
The present invention has been proposed in view of the above-mentioned conventional problems, and even if the air intake hose is flattened due to expansion and bending, the strength and the strength that can cope with such flattening due to expansion and bending, and A hose reinforcing ring that is flexible and has excellent pull-out strength when the wire forming the ring is pulled out from the connecting member that forms the ring, and does not damage the outer peripheral surface of the air intake hose to be fitted. It is intended to provide.
[0014]
[Means for Solving the Problems]
According to the present invention, the hose is fitted to the bellows portion of the air intake hose (H) connecting the supercharger (2), the intercooler (3) and the intake manifold (4) in the supercharged engine (1). In the hose reinforcing ring (6) used for suppressing expansion due to the supercharging pressure of (H), the ring (6) is a single stranded wire (62) in which a plurality of thin wires (61) are bundled and twisted. ) Is further bundled with a multi-stranded wire (63), the outer periphery of which is coated with a resin material (8), the wire of a predetermined length is rounded, and both ends (63a, 63a) are nippled. (7) is formed by bundling, and the bundling portion forms a female screw (73) on the inner wall surface of the nipple (7), and the double-stranded wire coating is applied to both end openings (73a, 73a) of the female screw. Unfinished end (63a, 3a) by inserting are formed by tightening the nipple opposite ends (72, 72) pressurized, and said nipple (7) is covered by a cylindrical elastic material sleeve (9).
[0018]
In the present invention, as described above, the internal thread portion (73) is formed on the inner wall surface of the nipple (7) that joins the end portions (63a) of the steel stranded wire (63), and the internal thread portion (73). ) Bite into the steel stranded wire (63) and increase the resistance to pulling out. For example, the air intake hose is flattened due to expansion or bending, and accordingly the nipple (7) to the steel stranded wire (63) is produced. Even if the pulling force of is applied, the steel stranded wire (63) does not come out of the nipple (7).
[0019]
As a member for forming a ring, a multi-stranded wire (63) obtained by bundling a plurality of single-stranded wires (62) formed by twisting a plurality of steel wires (61) is further used. The flatness due to expansion and bending of the air intake hose (5) can be sufficiently followed without lowering the strength of the single steel wire ring.
[0020]
Since the steel stranded wire (63) is covered with the resin material (8), the outer peripheral surface of the hose is not damaged.
Note that the end of the steel stranded wire (63), that is, the region inserted into the nipple is not covered with the resin material (8), so the surface of the steel stranded wire (63) is directly attached to the surface of the stranded wire (63). The female screw portion (73) does not bite and does not reduce the above-mentioned pullout resistance.
[0021]
Further, since the nipple (7) is surrounded by the cylindrical elastic material sleeve (9), it is possible to prevent damage caused by rubbing with the nipple (7) on the outer peripheral surface of the hose (5).
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0022]
In FIG. 1, the hose reinforcing ring denoted by reference numeral 6 as a whole is formed by rounding a double stranded wire (steel stranded wire) 63 and inserting both ends of the ring into female threads, which will be described later, and then crimping the outer periphery of the nipple 7. It is formed in a ring shape.
[0023]
As shown in FIG. 2, the steel stranded wire 63 is formed by first bundling seven galvanized steel wires 61 having a thin wire diameter in the illustrated example to form a single stranded wire 62, Further, in the illustrated example, seven single stranded wires 62 are bundled to form a wire material (double stranded wire 63) that is a base of a hose reinforcing ring.
In addition, the code | symbol 8 in FIG. 2 shows the resin coating given to the steel strand 63 in ring shape.
[0024]
On the other hand, the nipple 7, which is a connecting member that binds both ends 63 a and 63 a of the steel stranded wire 63 and connects them in a ring shape, is shown in FIG. 3 and FIG. Hexagons 72 are formed by crimping on both end sides of the rod-like body 71 having a circular cross section.
A female screw 73 is formed at the center of the cross section of the nipple 7 so as to penetrate the rod-like body 71 over the entire length.
[0025]
As shown in FIG. 5, the ring-shaped bundling of the steel stranded wire 63 is performed in such a manner that the both ends 63 a of the steel stranded wire 63 having a predetermined length are connected to both ends of the female screw 73 of the nipple 7 before the nipple 7 is crimped. After inserting from the opening 73a (see FIG. 3), both ends of the rod-like body 71 are crimped into a hexagon by a known means.
The diameter of the steel stranded wire is preferably slightly smaller than the root diameter of the female screw formed on the nipple 7.
[0026]
As shown in FIGS. 1 and 5, the nipple 7 is covered with a cylindrical sleeve 9 made of, for example, resin rubber (PVC).
[0027]
In the embodiment of the present invention, as described above, the internal thread portion 73 is formed on the inner wall surface of the nipple 7 that joins the end portions 63a of the steel stranded wire 63, and the internal thread portion 73 is twisted by caulking. Since it bites into the wire 63 and increases the resistance to pulling out, for example, the air intake hose 5 is flattened due to expansion or bending, and accordingly the pulling force from the nipple 7 to the steel stranded wire 63 acts. The steel strand 63 does not come out of the nipple 7.
[0028]
As a member for forming a ring, a multi-stranded wire (steel stranded wire) 63 obtained by bundling a plurality of single stranded wires 62 formed by twisting a plurality of steel wires 61 and further twisting them is used. The flatness due to the expansion and bending of the air intake hose 5 can be sufficiently followed without lowering the strength of a single steel wire ring (see FIG. 9).
[0029]
Since the steel stranded wire 63 is covered with the resin material (PA) 8, the outer peripheral surface of the hose 5 is not damaged.
Note that the end portion 63 a of the steel stranded wire, that is, the region inserted into the nipple 7 is not covered with the resin material (PA) 8, so that the female thread portion 73 of the nipple 7 is directly formed on the surface of the steel stranded wire 63. It does not bite and reduce the above-mentioned pull-out resistance.
[0030]
Further, since the nipple 7 is covered with the cylindrical elastic material sleeve 9, the outer peripheral surface of the hose 5 can be prevented from being damaged by rubbing with the nipple 7.
[0031]
【The invention's effect】
The effects of the present invention are listed below.
(A) Since the female thread portion formed on the inner wall surface of the nipple bites into the steel stranded wire by caulking and increases the resistance to pulling out, for example, the hose is flattened due to expansion or bending, and accordingly the steel stranded wire Even if the pulling force from the nipple is applied, the deviation of the steel strand from the nipple can be prevented.
(B) Since a double stranded wire (steel stranded wire) is used as a member for forming the ring, flattening due to expansion and bending of the hose is achieved without reducing the strength of a single steel wire ring of the conventional type. It is possible to follow the change sufficiently.
(C) Since the steel stranded wire is covered with the resin material, the outer peripheral surface of the hose is not damaged.
(D) Since the end portion of the steel stranded wire, that is, the region inserted into the nipple is not covered with the resin-based material, the female thread portion of the nipple directly bites into the surface of the steel stranded wire, and the above-described pulling resistance is reduced. There is no reduction.
(E) Since the nipple is covered with a cylindrical sleeve made of an elastic material, it is possible to prevent damage caused by rubbing with the nipple on the outer peripheral surface of the hose.
[Brief description of the drawings]
FIG. 1 is a front view illustrating a schematic configuration of a reinforcing ring for a hose according to an embodiment of the present invention. The side view which shows the whole intercooler hose which is embodiment of this invention.
FIG. 2 is a cross-sectional view of a steel stranded wire used for a hose reinforcing ring according to an embodiment of the present invention.
FIG. 3 is a partial cross-sectional side view of a nipple used in a hose reinforcing ring according to an embodiment of the present invention.
FIG. 4 is a front view of a nipple used in a hose reinforcing ring according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a detailed configuration of a bundling portion of a hose reinforcing ring according to an embodiment of the present invention.
FIG. 6 is a schematic diagram showing a schematic configuration of an intake / exhaust system in an engine of an intercooler specification.
FIG. 7 is a side view showing an example of an intercooler hose.
FIG. 8 is a cross-sectional view of a conventional intercooler hose.
FIG. 9 is a front view of a reinforcing ring for a hose that is an example of the prior art.
FIG. 10 is a front view of a reinforcing ring for a hose that is another example of the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Supercharger 2c ... Compressor 3 ... Intercooler 4 ... Intake manifold 6 ... Ring-shaped body 7 ... Nipple 8 ... Coating 9 ... Sleeve 61 ... Strand 62 ... Single strand 63 ... Double strand H ... Intercooler hose / Air intake hose

Claims (1)

  A supercharger (2), an intercooler (3), and an intake manifold (4) in the supercharged engine (1) are fitted to the bellows portion of the air intake hose (H), and the hose (H) is supercharged. In the hose reinforcing ring (6) used for suppressing expansion due to pressure, the ring (6) further bundles a plurality of single stranded wires (62) obtained by bundling a plurality of thin strands (61). The double-stranded wire (63) is used as a wire, the outer periphery thereof is coated with a resin material (8), the wire of a predetermined length is rounded, and both ends (63a, 63a) are bound together by nipples (7). The bundling portion is formed with an internal thread (73) on the inner wall surface of the nipple (7), and both ends (73a, 73a) of the internal thread are uncoated end portions ( 63a, 63a) Nipple end portions (72, 72) are formed by caulked and hose reinforcement ring, characterized in that said nipple (7) is covered by a cylindrical elastic material sleeve (9).

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