JP2010174956A - Intermediately holding fitting of hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intermediately holding fitting of hose, which can be reduced in weight and manufactured at low cost without fatigue breakage by stress concentration, and can attach a counter member without running on a circular part formed at a boundary (contact position) between a socket part and a bracket part. <P>SOLUTION: The intermediately holding fitting of hose 1 includes the cylindrical socket part 2, and the flat plate-like bracket part 3 having a bolt hole 3a. A recessed part 4 is provided on the circumferential surface of the circular arc part formed at the boundary between the socket part 2 and the bracket part 3 on the surface of the bracket part 3 with the socket part 2 formed thereon. The recessed part 4 is provided within a predetermined width w smaller than the outer diameter of the socket part 2 across a vertical line C2, the vertical line C2 being orthogonal to a center line C1 connecting respective centers of the socket part 2 and the bolt hole 3a and passing through the center of the socket part 2. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention is used for a brake hose of a vehicle such as an automobile or a motorcycle, and an intermediate holding bracket for fixing the hose intermediate portion to the vehicle body or the like for the purpose of preventing the hose from interfering with other members such as the vehicle body. About.

  Conventionally, as an intermediate holding bracket (hereinafter also simply referred to as an intermediate holding bracket) for a brake hose used in a hydraulic brake system of a vehicle such as an automobile or a motorcycle, one end is connected to the brake system and the other end is a caliper for brake. There are some which consist of the socket part which hold | maintains the hose connected to 1 by the crimping from outer periphery, and the bracket part attached to the strut which is a mating member.

  This intermediate holding metal fitting is integrally formed by copper brazing or welding after a socket part formed by cutting from a pipe material and a bracket part by pressing a plate material are formed using carbon alloy steel such as S12C, SWCH12, SPHC, etc. There are some that have been formed, and those that are integrally formed by cold forging from a coil material, deep drawing from a plate material, or the like.

  In the conventional example that is joined and integrated by copper brazing or welding, the joining process takes time, and this joining cost is a high cost factor for the intermediate holding metal fitting. Moreover, when manufacturing by cold forging from a coil material, it is necessary to increase the thickness of a bracket part from the problem of the formability of cold forging, and therefore it is not suitable for weight reduction. Although there is a method in which only the bracket portion is thinned by pressing, the manufacturing cost is increased.

  On the other hand, there is a hose metal fitting according to a conventional example that achieves weight reduction and production cost reduction by forming by deep drawing from a plate material (see Patent Document 1). However, according to the hose fitting according to this conventional example, as shown in the attached FIG. 5 which is a longitudinal sectional view thereof, the engaging portion of the mating member (not shown) is overlapped on the engaging portion 12a of the flange portion 12, When engaging each engaging portion with a bolt, there is a problem in that the mating member surface rides on the arc portion R formed at the boundary (contact point portion) between the annular portion 11 and the flange portion 12 and cannot be engaged with each other. there were.

  An intermediate holding metal fitting according to a conventional example in which such problems are improved will be described below with reference to FIGS. 6A and 6B relate to an embodiment of a conventional example, FIG. 6A is a perspective view showing an intermediate holding metal fitting, FIG. 6B is a sectional view of the intermediate holding metal fitting in FIG. Sectional drawing which shows an example of an assembly | attachment of a holding metal fitting, FIG. 8 is a schematic diagram for demonstrating the problem of the intermediate holding metal fitting which concerns on a prior art example.

  The intermediate holding metal fitting A according to this conventional example includes a cylindrical socket portion 21 and a flat bracket portion 23 provided with a bolt hole 22, and at least one of the material of the socket portion 21 and the bracket portion 23 is a material. It is made of aluminum or aluminum alloy and is integrally formed. Then, as shown in FIG. 7, after the hose H is inserted into the socket portion 21, the socket portion 21 is crimped and the hose H is attached.

Further, in the intermediate holding metal fitting A according to the conventional example, cutting or pressing is performed on a boundary portion R between the socket portion 21 and the bracket portion 23 (that is, an arc portion formed at the boundary between the socket portion 21 and the bracket portion 23) R. A notch 28 is provided. Since the notch portion 28 is provided in the boundary portion R, the counterpart member 25 is prevented from riding on the boundary portion R.
As shown in FIG. 6, the notch portions 28 are provided on both surfaces of the bracket portion 23, so that the mating member 25 can be assembled from any direction on both surfaces of the bracket portion 23 for convenience (see Patent Document 2). ).

  However, when the notch portion 28 is provided over the entire circumference of the socket portion 21 of the boundary portion R, a hose H as a brake hose is attached to the intermediate holding bracket A and mounted on the vehicle body on the back side of the wheel of the automobile. As shown in FIG. 8, snow balls are formed on the hose H in the winter in a cold region, or mud adheres to the hose H due to traveling in a muddy area. And the load of these adhering foreign matters such as snow balls and mud acts as a bending moment on the socket portion 21 via the hose H, and the adhering foreign matter swings as the vehicle travels, and the boundary portion R Repeated stress is applied. As a result, there is a problem that stress is concentrated at the notch 28 and fatigue failure occurs.

Japanese Patent Publication No.3-3111 JP 2001-248761 A

  Accordingly, an object of the present invention is to create a circular arc formed at the boundary (contact point portion) between the socket part and the bracket part without being fatigued due to concentration of stress and capable of being manufactured at a light weight and low cost. An intermediate holding metal fitting for a hose that can be attached without riding on the section is provided.

  In order to achieve the above object, the means employed by the intermediate holding metal fitting of the hose according to claim 1 of the present invention is a hose comprising a cylindrical socket portion and a flat bracket portion provided with a bolt hole. In the intermediate holding fitting, a center connecting each center of the socket part and the bolt hole to a circular arc part circumferential surface formed at a boundary between the socket part and the bracket part on the bracket part surface on the side where the socket part is formed. When a perpendicular line perpendicular to the line and passing through the center of the socket part is drawn, a concave part is provided within a predetermined width smaller than the outer diameter of the socket part with the perpendicular line interposed therebetween.

  According to a second aspect of the present invention, there is provided a means for adopting the intermediate holding bracket of the hose according to the first aspect, wherein the material of the socket part and the bracket part is made of aluminum or an aluminum alloy. It is a feature.

  According to a third aspect of the present invention, there is provided an intermediate holding metal fitting for the hose according to the first aspect, wherein the socket portion and the bracket portion are integrally formed. To do.

  According to a fourth aspect of the present invention, there is provided an intermediate holding bracket for a hose according to any one of the first to third aspects, wherein the bracket portion is joined to at least a mating member. The surface is provided with a resin coating for preventing electrolytic corrosion.

  According to a fifth aspect of the present invention, there is provided an intermediate holding bracket for a hose according to any one of the first to fourth aspects, wherein the predetermined width sandwiching the perpendicular is 0. It is formed in the range of 5 mm or more and 1/2 or less of the outer diameter of the socket part.

  According to the intermediate holding fitting for a hose according to claim 1 of the present invention, in the intermediate holding fitting for a hose comprising a cylindrical socket portion and a flat bracket portion provided with a bolt hole, the socket portion is formed. The center of the socket part is perpendicular to the center line connecting the centers of the socket part and the bolt hole to the circular arc part peripheral surface formed at the boundary between the socket part and the bracket part on the bracket part surface on the formed side. When a perpendicular passing through is drawn, a concave portion is provided within a predetermined width smaller than the outer diameter of the socket portion with the perpendicular interposed therebetween.

  Since such an intermediate holding metal fitting can be formed by deep drawing from a plate material, it can be manufactured at a low weight and at a low cost. Further, since the recess is formed discontinuously in a predetermined width smaller than the outer diameter of the socket portion, stress concentration on the recess is reduced, and the counterpart member can be connected to the socket portion without fatigue failure. It is possible to provide an intermediate holding metal fitting for a hose that can be attached without riding on the boundary portion between the bracket portion and the bracket portion.

  Moreover, according to the intermediate holding metal fitting for the hose according to claim 2 of the present invention, since the material of the socket part and the bracket part is made of aluminum or aluminum alloy, the weight of the intermediate holding metal fitting made of steel or steel alloy is reduced. Can be reduced to about 1/3.

  Furthermore, according to the intermediate holding metal fitting for a hose according to claim 3 of the present invention, the socket portion and the bracket portion are integrally formed, so that weight reduction and cost reduction can be achieved.

  Furthermore, according to the intermediate holding metal fitting for a hose according to claim 4 of the present invention, since the electrolytic coating is applied to at least the joint surface of the bracket portion to the mating member, the mating member is of a different type. Even if it is a metal, there is no possibility of causing electric corrosion by contact.

  On the other hand, according to the intermediate holding metal fitting for a hose according to claim 5 of the present invention, the predetermined width sandwiching the perpendicular is formed in the range of 0.5 mm or more and 1/2 or less of the outer diameter of the socket part. The mating member can be attached without climbing on the arc portion formed at the boundary between the socket portion and the bracket portion, and the stress concentration on the concave portion is reduced, so that the fatigue failure does not occur.

It is a top view which shows the intermediate holding metal fitting of the hose which concerns on embodiment of this invention. It is an arrow view which shows arrow XX of FIG. It is sectional drawing which expands and shows the arrow YY of FIG. FIG. 2 is a plan view showing an example of the assembly of the intermediate holding metal fitting in FIG. It is a longitudinal cross-sectional view of the metal fitting for hoses which concerns on a prior art example. FIG. 5A is a perspective view showing an intermediate holding metal fitting, and FIG. 5B is a cross-sectional view of the intermediate holding metal fitting in FIG. It is sectional drawing which shows an example of the assembly | attachment of the intermediate holding | maintenance metal fitting in FIG. It is a schematic diagram for demonstrating the problem of the intermediate holding metal fitting which concerns on a prior art example.

  Hereinafter, an intermediate holding metal fitting for a hose according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing an intermediate holding metal fitting for a hose according to an embodiment of the present invention, FIG. 2 is an arrow view showing an arrow XX in FIG. 1, and FIG. 3 is an arrow Y-Y in FIG. FIG. 4 is an enlarged cross-sectional view, and FIG. 4 is a plan view showing an example of the assembly of the intermediate holding metal fitting in FIG.

  An intermediate holding metal fitting 1 for a hose according to an embodiment of the present invention includes a cylindrical socket portion 2 and a flat bracket portion 3 provided with a bolt hole 3a. The socket part 2 and the bracket part 3 in the intermediate holding metal fitting 1 can be integrally formed by cold forging from a coil material or deep drawing from a plate material, but in terms of weight reduction and cost reduction, It is preferable to integrally form by deep drawing from a plate material. The bolt hole 3a is opened by either pressing or cutting.

  In such an intermediate holding metal fitting 1 in which the socket part 2 is integrally formed by deep drawing, a boundary (contact point) between the socket part 2 and the bracket part 3 is formed on the bracket part 3 surface on the side where the socket part 2 is formed. A circular arc portion R is formed at the part). Then, on the peripheral surface of the arc portion R on the surface of the bracket portion 3 on the side where the socket portion 2 is formed, the socket portion 2 is orthogonal to a center line C1 connecting the centers of the socket portion 2 and the bolt hole 3a. When a perpendicular line C2 passing through the center of the socket part 2 is drawn, the concave part 4 is provided in a predetermined width w that is smaller than the outer diameter D of the socket part 2 across the perpendicular line C2.

  By configuring in this way, the recess 4 is formed discontinuously in a predetermined width w smaller than the outer diameter D of the socket portion 2, so stress concentration in the recess 4 is reduced. As shown in FIG. 4, when the mating member 6 is attached to the bracket portion 3, the mating member 6 can be attached without riding on the boundary portion R between the socket portion 2 and the bracket portion 3. Become.

  In addition, the predetermined width w sandwiching the perpendicular C2 is preferably formed in a range of 0.5 mm or more and 1/2 or less of the outer diameter D of the socket part 2. When the predetermined width w is 0.5 mm or more, the mating member 6 can be attached without riding on the boundary portion R between the socket portion 2 and the bracket portion 3, and the predetermined width w is the outer diameter of the socket portion 2. If it is ½ or less of D, the stress concentration in the concave portion 4 is reduced, and fatigue failure does not occur.

  Furthermore, the depth d of the recess 4 is preferably in the range of more than 0 mm and 0.5 mm or less. If the depth d of the concave portion 4 exceeds 0 mm, the mating member 6 can be attached without reliably climbing onto the boundary portion R between the socket portion 2 and the bracket portion 3, and the depth d of the concave portion 4 is 0.5 mm. If it is below, the intensity | strength of the boundary part R of the said socket part 2 and the bracket part 3 is not reduced so much. In addition, it is preferable to form such a recessed part 4 simultaneously using a metal mold | die when carrying out the deep drawing process of the socket part 2 from a board | plate material.

  On the other hand, the material of the socket part 2 and the bracket part 3 is preferably made of aluminum or aluminum alloy from the viewpoint of weight reduction as will be described later. As such an aluminum alloy, an Al—Mg—Si alloy, an Al—Mg alloy, an Al—Si alloy, an Al—Cu—Mg alloy, Al—Zn—Mg, or the like can be used. Since the specific gravity of the aluminum or aluminum alloy is about 1/3 of that of steel or steel alloy, the weight of the intermediate holding fitting 1 can be obtained by using aluminum or aluminum alloy as the material of the socket part 2 and the bracket part 3. Can be reduced to about 1/3.

  Since an oxide film is automatically formed on the surface of the intermediate holding metal fitting 1 made of aluminum or aluminum alloy and is chemically stable, no surface treatment is particularly required. Especially in automobile applications, since it is assembled in the vicinity of the wheel, it may be possible to make a scar due to stone splash, but even if the surface treatment is omitted, an oxide film is also automatically formed on the scar, so that There is no risk of corrosion.

  However, since aluminum or an aluminum alloy may cause electrolytic corrosion due to contact with a different metal, depending on the material of the mating member 6, at least the joint surface of the mating member 6 may have an electrolytic corrosion preventing resin. A coating 5 is preferably applied. As such a resin coating 5 for preventing electrolytic corrosion, a resin such as an epoxy resin, a fluororesin or an epoxyphenol resin can be used.

  Next, a method for assembling the intermediate holding metal fitting 1 having such a configuration will be described below with reference to FIG. In the intermediate holding metal fitting 1 of the hose according to the embodiment of the present invention, first, the nipple 7 is inserted into the crimping position inside the hose H to be assembled. Next, after the hose H is inserted into the socket part 2 of the intermediate holding metal fitting 1, the outer periphery of the socket part 2 is crimped in the centripetal direction and assembled with the hose H.

  The intermediate holding metal fitting 1 to which the hose H is assembled is inserted into a mating member 6 having a bifurcated portion 6a for stopping rotation, and then the bolt 8 passed through the bolt holes 3a and 6b of the bracket portion 3 and the mating member 6. And the nut 9 and the bolt is tightened to the mating member 6.

  As described above, the intermediate holding metal fitting for the hose according to the present invention is an intermediate holding metal fitting for a hose comprising a cylindrical socket portion and a flat bracket portion provided with a bolt hole, on the side where the socket portion is formed. When a perpendicular line passing through the center of the socket part is drawn perpendicular to the center line connecting the centers of the socket part and the bolt hole on the peripheral surface of the boundary between the socket part and the bracket part on the bracket part surface, A concave portion is provided in a predetermined width smaller than the outer diameter of the socket portion across the perpendicular.

  Therefore, the intermediate holding metal fitting can be formed by deep drawing from a plate material, and can be manufactured at a light weight and at a low cost. Further, since the recess is formed discontinuously in a predetermined width smaller than the outer diameter of the socket portion, stress concentration on the recess is reduced, and the counterpart member can be connected to the socket portion without fatigue failure. It can be installed without riding on the boundary between the bracket and the bracket.

C1: Center line connecting the center of the socket part and the bolt hole,
C2: a perpendicular perpendicular to the center line C1 and passing through the center of the socket part,
D: socket part outer diameter, d: recess depth,
H: Hose, R: Arc part,
w: a predetermined width across the perpendicular C2,
1: Intermediate holding bracket (for hose) 2: Socket part,
3: Bracket part, 3a: Bolt hole,
4: Recess, 5: Resin coating for preventing electric corrosion,
6: mating member, 6a: bifurcated portion, 6b: bolt hole,
7: Socket,
8: Bolt, 9: Nut

Claims (5)

  In an intermediate holding metal fitting for a hose comprising a cylindrical socket part and a flat bracket part provided with a bolt hole, the socket part and the bracket part on the bracket part surface on the side where the socket part is formed. When a perpendicular line that passes through the center of the socket part and is perpendicular to the center line that connects the socket part and the center of the bolt hole is drawn on the circumferential surface of the circular arc part formed at the boundary, An intermediate holding metal fitting for a hose, wherein a concave portion is provided within a predetermined width smaller than the diameter.   The intermediate holding metal fitting for a hose according to claim 1, wherein a material of the socket part and the bracket part is made of aluminum or an aluminum alloy.   The intermediate holding metal fitting for a hose according to claim 1 or 2, wherein the socket part and the bracket part are integrally formed.   The hose intermediate holding metal fitting according to any one of claims 1 to 3, wherein a resin coating for preventing electric corrosion is applied to at least a joint surface of the bracket portion to a mating member. 5. The hose according to claim 1, wherein a predetermined width sandwiching the perpendicular is formed in a range of 0.5 mm or more and ½ or less of the outer diameter of the socket part. Intermediate holding bracket.

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