JPH06109181A - Joint metal fittings for hose assembly and its manufacture - Google Patents

Abstract

PURPOSE:To facilitate assembly in a hose assembling joint metal fittings where a sleeve body and a nipple body are unitedly fastened, by threadedly engaging the sleeve body and the nipple body, and abutting the flange-shaped joining part of the nipple body on the knocking face of the sleeve body for positioning them. CONSTITUTION:Joint metal fittings for assembling an automobile power steering hose is composed of a dividedly formed sleeve body 10 and a nipple body 30, and the sleeve body 10 has a connecting part 13 where an internal thread is machined on one end of a base section 11 whose outer periphery is formed into a hexagon nut, and a sleeve 15 unitedly provided on the other end. On the other hand, the nipple body 30 has a flange-shaped joining part 33 formed at the one end of a nipple 31. The nipple 31 is inserted through the nipple inserting through hole 19 of the sleeve body 10, and an external thread 35 is threadedly engaged with the internal thread 17, and the flange-shaped joining part 33 of the nipple body 30 is abutted on a nipple abutting face 20 formed on the sleeve body 10 to unitedly assemble the sleeve body and the nipple body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose assembly fitting, and more particularly to a hydraulic rubber hose assembly and various hydraulic resin hose assembly fittings such as a power steering hose, a hydraulic active suspension hose, and an oil brake. The present invention relates to a hose assembly for automobiles such as a hose, an oil hose, and a fuel hose, a high-pressure hose for various industries, a fitting for a super-high-pressure hose assembly, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Fittings for hose assemblies are used to connect hoses to equipment. Conventional fittings are generally provided with a connecting portion such as a female screw and a male screw at one end of a base portion having a through hole, a nipple and a sleeve provided on the opposite side, and a hose is inserted between the nipple and the sleeve.
The sleeves are secured together by crimping. And, for example, in an assembly joint fitting used for an oil brake hose, the nipple and the sleeve are formed separately for cost reduction.

Regarding such a joint fitting composed of two parts, there is a joint fitting disclosed in Japanese Utility Model Laid-Open No. 28389/1990 by the applicant of the present application. In the invention described in the above publication, as shown in FIG. 6, the sleeve body 41 and the nipple body 43 are welded. The sleeve body 41 is provided with a connecting portion 47 at one end of a base portion 45 having a through hole 44, and a sleeve 49 is formed on the opposite side together with a nipple abutting surface 51 which is a surface perpendicular to the through hole 44. On the other hand, the nipple body 43
Is formed with a flange-shaped joint 55 at one end of the nipple 53. Then, a protrusion is provided on either one of the nipple abutting surface 51 or the flange-shaped joint portion 55 of the nipple body 43, and the nipple abutting surface 51 and the flange-shaped joint portion 55 are abutted against each other, and the projection welding or friction welding is performed. It is welded and fixed integrally. The sleeve body 41 and the nipple body 43 are mainly manufactured by cutting.

[0004]

However, although the joint metal fitting having the above-mentioned structure can be applied to the joint metal fitting of any shape, a large amount of swarf is generated because it is mainly manufactured by cutting work, and the product is There is a problem that the yield is poor and the material is wasted a lot. Further, since the nipple abutting surface 51 and the flange-shaped joint portion 55 are abuttingly welded to each other, the joint portion 57 faces the through hole 44 and directly comes into contact with the fluid. Further, a welding machine used for welding the sleeve body and the nipple body, equipment for high voltage, etc. are required.

The present invention has been made in view of the above circumstances, and the sleeve body and the nipple body can be easily assembled by screwing, a high sealing property can be obtained, and the forging process and the rolling process can be inexpensively manufactured. An object of the present invention is to provide a joint fitting for a hose assembly that can be manufactured and a method for manufacturing the same.

[0006]

In order to achieve the above object, the present invention has the following constitution. That is, in a joint metal fitting for a hose assembly formed by integrally fixing a separately molded sleeve body and a nipple body, a connecting portion is formed on one side of a base portion, a sleeve is provided on the other side, and a shaft center portion of the base portion is formed. In addition to providing a nipple insertion hole engraved with a female screw, a sleeve main body whose connecting portion side of the base is a nipple abutting surface, and a flange-like joint at one end of the nipple, and a male screw engraved on a part of the outer peripheral surface of the nipple. It is characterized by comprising a nipple body formed by. Further, in the method for manufacturing the joint fitting, the sleeve body is first cold-forged to continuously connect a connecting portion to one side of the base portion and a sleeve to the other side, and form a nipple insertion hole in the axial center portion of the base portion. The provided intermediate part is formed, and then the nipple insertion hole is formed by engraving a female screw by rolling.On the other hand, the nipple body is first cold forged to form a male screw on one side of the nipple. Obtain an intermediate part that has a thick joint and a flange-shaped joint at the tip, and then form a male screw on the outer peripheral surface of the thick portion by rolling to insert the male screw of the nipple and the nipple of the sleeve body. It is characterized by being assembled integrally by screwing the female screw of the hole.

[0007]

The sleeve main body and the nipple main body are assembled by screwing, and the axial disengagement is completely prevented. Further, the flange-like joint portion of the nipple body is brought into contact with the nipple abutting surface of the sleeve body for positioning.
For both the sleeve body and the nipple body, the intermediate parts are first formed by cold forging, and then the threaded portion is formed by rolling, so no cutting chips are generated and material costs are reduced, and productivity is shortened by shortening processing time. Can be improved.

[0008]

EXAMPLES The present invention will be described in detail below based on examples. FIG. 1 is a side view in which the upper half of the joint fitting for assembly of the present invention is shown in section. The assembly fitting includes a sleeve body 10 and a nipple body 30. The sleeve body 10 has a base portion 1 whose outer peripheral surface is formed into a hexagonal nut.
A connecting portion 13 formed by engraving a female screw is provided on one end side of 1, and a sleeve 15 is integrally provided on the other end side. A nipple insertion hole 19 formed by engraving a female screw 17 is formed in the axial center portion of the base portion 11. The nipple insertion hole 19 is formed parallel to the axial direction. Further, the side surface of the base portion 11 facing the opening of the connection portion 13 is a nipple abutting surface 20 that is a right-angled surface with respect to the nipple insertion hole 19.

On the other hand, the nipple body 30 has a flange-shaped joint portion 33 formed at one end of the nipple 31, and a male screw 35 is engraved on the outer peripheral surface of the nipple 31 adjacent to the flange-shaped joint portion 33. There is. Then, in order to assemble the sleeve body 10 and the nipple body 30, the nipple 3 is inserted into the nipple insertion hole 19 of the sleeve body 10.
1 may be inserted, the female screw 17 and the male screw 35 may be screwed together, and the flange-shaped joint portion 33 of the nipple body 30 may be brought into contact with the nipple abutting surface 20 to be integrally assembled.

A manufacturing method for manufacturing the joint fitting according to the above embodiment by cold forging and rolling will be described. The sleeve body 10 and the nipple body 30 are divided in advance and molded. First, as shown in FIG. 2 (a), the joint portion ports 13a and the sleeve 1 are formed on both sides of the base portion 11 by cold forging.
5 is continuously provided, and an intermediate part 10a is formed by forming a nipple insertion hole 19 in the axial center portion of the base 11. Then, FIG.
As shown in (b), by rolling, a female screw 17 is engraved in the nipple insertion hole 19 of the base 11, and a female screw 18 is engraved on the inner peripheral surface of the connection port 13a to form the connection part 13.
And Then, the side surface of the connecting portion 13 of the base portion 11 is used as the nipple abutting surface 20. The outer peripheral surface of the connecting portion 13 may be appropriately cut according to a predetermined shape such as a clip mounting groove.

On the other hand, the nipple body 30 is first shown in FIG.
As shown in (a), one side of the nipple 31 is made into a thick portion 31a for engraving a male screw by cold forging, and
An intermediate component having a flange-shaped joint 33 formed at the tip is obtained. Thereafter, as shown in FIG. 3B, a male screw 35 is engraved on the outer peripheral surface of the thick portion 31a by rolling.

In order to assemble the sleeve main body 10 and the nipple main body 30 having the above construction, as shown in FIG. 1, the nipple 31 is inserted into the nipple insertion hole 19 of the sleeve main body 10 and the female screw 17 and the male screw 35 are screwed together. At the same time, the flange-shaped joint portion 33 may be brought into contact with the nipple abutting surface 20. The flange-shaped joint portion 33 is positioned by coming into contact with the nipple abutting surface 20, and the axial displacement of the nipple is reliably prevented. In addition, since it is screwed on the outer peripheral surface of the nipple body 30, it does not come into direct contact with the fluid, and therefore high sealing performance can be obtained.

4 and 5 show another embodiment of the nipple body. That is, one side of the nipple 32 is made into a thick portion 32a for engraving a male screw by cold forging, and a flange-like joint portion 34 is formed at the tip, and the thick portion 3 is further formed.
An intermediate component having a protrusion 36 on the inner surface of 2a is obtained. After that, as in FIG. 3B, the thick portion 32 is formed by rolling.
Nipple body 39 with male screw 38 engraved on the outer peripheral surface of a
And

To assemble the nipple body 39 and the sleeve body 10, the nipple 32 is inserted into the nipple insertion hole 19 of the sleeve body 10 and the female screw 17 is inserted.
And the male screw 38 are screwed together, and the flange-shaped joint 34 is brought into contact with the nipple abutting surface 20. Then the nipple 3
The expansion die 40 inserted in 2 is pulled toward the sleeve to expand the diameter of the protrusion 36 to the same surface as the inner surface of the nipple and bulge outward to form a bulge 36a. When the bulging portion 36a is formed, the screw portion is crushed, so that the sleeve body 10 and the nipple body 39 are completely prevented from rotating. Therefore, in the case of the second embodiment, the rotation in the axial direction is prevented and the hose can be more firmly fixed.

[0015]

According to the present invention, the sleeve main body and the nipple main body, which are molded separately, are assembled by screwing, and therefore the assembly is extremely easy. Further, since the threaded surface does not come into direct contact with the fluid, it is possible to prevent the fluid from permeating and obtain a high sealing property. Further, since the intermediate parts to be split-molded are manufactured by cold forging and rolling, the cutting cost is not generated and the processing time can be shortened extremely, so the material cost,
The processing cost can be reduced. In addition, no special welding technology or welding equipment is required.

[Brief description of drawings]

FIG. 1 is a side view showing a cross section of an upper half of a joint fitting for assembly according to the present invention.

FIG. 2 is a side view in cross section of the upper half showing an intermediate part of the sleeve body.

FIG. 3 is a side view showing an intermediate part of the nipple body in a cross section of an upper half thereof.

FIG. 4 is a side view in cross section of the upper half showing an intermediate part of another nipple body.

FIG. 5 is a side view showing a cross section of an upper half of a joint fitting for assembly in another embodiment.

FIG. 6 is a side view showing a method of assembling a sleeve main body and a nipple main body in the related art, in which an upper half is cross-sectioned.

[Explanation of symbols]

 10 sleeve body 11 base portion 13 connection portion 15 sleeve 17 female screw 19 nipple insertion hole 20 nipple abutting surface 30 nipple body 31 nipple 33 flange-like joint portion 35 male screw 36 protrusion portion 36a bulge portion 39 nipple body

Claims (2)

[Claims] 1. A joint fitting for a hose assembly in which a split-molded sleeve body and a nipple body are integrally fixed to each other, wherein a connecting portion is formed on one side of a base portion, and a sleeve is provided on the other side, and a shaft of the base portion. In addition to providing a nipple insertion hole with a female screw engraved in the core, a sleeve body with the nipple abutting surface on the connection side of the base and a flange-like joint at one end of the nipple, and a male screw on a part of the outer peripheral surface of the nipple. A fitting for a hose assembly, characterized in that it comprises a nipple body formed by carving. 2. The sleeve main body is formed by cold forging an intermediate part in which a connecting portion is continuously provided on one side of a base portion and a sleeve is continuously provided on the other side thereof, and a nipple insertion hole is provided at an axial center portion of the base portion. Then, the nipple body is manufactured by engraving a female screw in the nipple insertion hole by rolling, while the nipple body is first cold forged to form a thick portion for engraving a male screw on one side of the nipple. Along with that, an intermediate part with a flange-shaped joint formed at the tip is obtained, and then a male screw is engraved on the outer peripheral surface of the thick portion by rolling, and the male screw of the nipple and the female screw of the nipple insertion hole of the sleeve body are attached. A method for manufacturing a joint fitting for a hose assembly, characterized in that the fitting fitting is assembled integrally by screwing.