JPH0630598U - Hose intermediate fitting bracket - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an inexpensive intermediate joint fitting, in which the sleeve main body and the nipple main body are easily assembled, high sealing property is obtained. In an intermediate joint fitting in which a split-molded sleeve body and a nipple body are integrally fixed, the sleeve body has at least one annular fitting portion formed at an axial center portion of an intermediate base portion provided with sleeves on both sides. A nipple insertion hole is provided, and the nipple body is characterized in that it has an annular bulge portion that fits in the annular fitting portion in the middle portion of the nipple provided on both sides.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an intermediate joint fitting for connecting a rubber hose, and more specifically, for connecting various hydraulic rubber hoses and various hydraulic resin hoses, particularly hydraulic brake hoses for automobiles, to both ends and fixing them to the vehicle body. Regarding hose intermediate fittings.

[0002]

[Prior art]

 Conventionally, this kind of hose intermediate fitting has been used for holding and fixing the intermediate portion of a flexible rubber hose used as an automobile part, for example, in order to prevent a hydraulic brake hose from particularly coming into contact with a tire. Used for.

FIG. 8 shows an intermediate joint fitting formed by cutting. That is, the sleeve 3 and the nipple 5 are concentrically provided on both sides of the intermediate base 1, and the nipples 5 are communicated with each other by the coupling holes 7. After the rubber hose (not shown) is inserted into the annular groove 9 formed by the sleeve 3 and the nipple 5, the outer peripheral surface of the sleeve 3 is caulked and fixed. Then, press the intermediate base portion 1 of the joint metal fitting having the above-mentioned configuration into the metal fitting insertion hole of a mounting bracket (not shown) which is separately molded, and integrally fix the same, and insert the bolt into the bolt hole provided in the bracket. To fix it.

Further, FIG. 9 shows a case where a sleeve body and a nipple are separately formed and fixed integrally by projection welding. That is, the sleeve body is formed by connecting the sleeves 11 concentrically on both sides of the intermediate base 10 and forming the through holes 13 in the axial center of the intermediate base 10. The side surface of the intermediate base portion 10 in the sleeve 11 is formed as a plane perpendicular to the axis. On the other hand, the nipple body is provided with a flange 17 at one end of the nipple 15 having a size that can be inserted into the sleeve 11. An annular projection is provided on the outer surface of the flange 17. Then, it is inserted into the sleeve 11 from the flange 17 and brought into contact with the side surface of the intermediate base portion 10 and fixed integrally by projection welding.

[0005]

[Problems to be solved by the device]

 However, in the case of the intermediate joint metal fitting formed by the cutting work shown in FIG. 8, the shape of the cutting tool is complicated and a lot of man-hours are required. Furthermore, there is a problem that a lot of chips are generated, which is uneconomical and the cost is high as a whole. In addition, the intermediate joint metal fitting for assembling the three parts formed by split molding shown in FIG. 9 has a better product yield than that obtained by cutting, but the through hole 13 of the intermediate base 10 and the through hole of the nipple 15 are accurately formed. It was difficult to match. In addition, a projection welding machine for welding and a substation for it are required. Further, in the case of the metal fitting for welding the nipple, there is a problem that the welding portion directly contacts the fluid. That is, since the inner side surface of the intermediate base portion and the flange 17 are abuttingly welded to each other, the welded portion comes into direct contact with the fluid. In this type of metal fitting that is required to have high sealing performance, it is not preferable from the viewpoint of sealing performance that the welded part faces the through hole 13 and contacts the fluid.

The present invention has been made in view of the above situation, and an object thereof is to provide an inexpensive intermediate joint fitting in which a sleeve body and a nipple body are easily assembled, a high sealing property is obtained. .

[0007]

[Means for Solving the Problems]

 The present invention has the following configuration in order to achieve the above object. That is, in an intermediate joint fitting in which a sleeve body and a nipple body which are molded separately are integrally fixed, the sleeve body has at least one annular fitting portion formed on the axial center portion of the intermediate base portion provided with sleeves on both sides. The nipple insertion hole is provided, and the nipple body is characterized in that the nipple main body has an annular bulge portion that fits into the annular fitting portion in the middle portion of the nipple provided on both sides.

[0008]

[Function of the device]

 Since the outer peripheral surface of the nipple body is fitted to the intermediate base portion of the sleeve body, not only the axial disengagement is completely prevented, but also direct contact with the fluid at the fitting portion is prevented. Further, since the nipple body is integrally formed and communicates with each other, the displacement of the through hole is prevented.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail based on embodiments. FIG. 1 is a side view showing a cross section of the upper half of the intermediate joint fitting according to the first embodiment of the present invention. The intermediate joint fitting comprises a sleeve body 20 and a nipple body 21. The sleeve body 20 is formed by concentrically connecting the sleeves 25 having substantially the same size on both sides of the intermediate base portion 23. An annular groove 29 for attaching a clip is provided on the outer peripheral surface of the intermediate base portion 23, and a nipple insertion hole 31 having an annular groove 30 formed as a fitting recess is formed on the inner peripheral surface of the shaft center portion. . Then, the side surface 33 of the intermediate base portion 23 inside the sleeve 25 forms a plane perpendicular to the axis.

On the other hand, the nipple body 21 has substantially the same length as the sleeve body 20, and a flange-like joint 35 is formed on the outer peripheral surface thereof, which abuts the intermediate base side surface 33 when assembled. Further, on the outer peripheral surface of the nipple body 21, an annular bulging portion 37 that fits in the annular groove 30 is provided. The annular bulging portion 37 is provided at a substantially middle portion of the nipple 39. Therefore, when the sleeve main body 20 and the nipple main body 21 are assembled together, the flange-like joint portion 35 abuts on the intermediate base side surface 33, and the annular bulge portion 37 fits into the annular groove 30, and the inner peripheral portion of the intermediate base portion 23. The portion is fitted between the flange-shaped joint portion 35 and the annular bulging portion 37.

The method for manufacturing the intermediate joint fitting according to the above embodiment by cold forging and cutting will be described. The sleeve main body 20 and the nipple main body 21 are divided and formed in advance. First, as shown in FIG. 2A, an intermediate component 20a having sleeves 25 on both sides of the base portion 23 is formed by cold forging. Next, as shown in FIG. 2 (b), a nipple insertion hole 31 is formed in the shaft center of the base portion 23 by cutting, and an annular groove 30 is formed in the inner peripheral surface, and a clip is attached to the outer peripheral surface. A groove 29 is provided. On the other hand, as shown in FIG. 3, the nipple body 21 first has a partition wall inside the middle of the left and right nipples 39 by cold forging, and has a flange-like contact with the outer peripheral surface offset to one side from the partition wall. An intermediate component is formed by projecting the joint portion 35, and then a through hole is provided in the partition wall to form a thick portion 40.

To assemble the sleeve main body 20 and the nipple main body 21 having the above-described configuration, as shown in FIG. 4, the nipple intermediate component is inserted into the sleeve main body 20 shown in FIG. Is contacted with the intermediate base side surface 33. Next, when the expansion die 42 inserted into the nipple is pulled out to the other side, the thick portion 40 expands in diameter and bulges outward to form the annular bulge portion 37. In the above configuration, the flange-like joint portion 35 abuts on the intermediate base side surface 33, and the annular bulge portion 37 is fitted into the annular groove 30 to assemble them into a meshed state, so that the axial disengagement is surely prevented. To be done. Furthermore, since the left and right nipples are integrally formed and are joined to the sleeve body 20 on the outer peripheral surface, they do not come into direct contact with the fluid and do not leak.

FIG. 5 shows another embodiment of the present invention. In this embodiment, two annular projections provided on the outer peripheral surface of the nipple body are fitted in the notches on both sides of the intermediate base. That is, the nipple insertion hole 53 is formed in the axial center portion of the intermediate base portion 51 of the sleeve body 50, and the cutout portion 55 is provided. On the other hand, the outer peripheral surface of the nipple body 57 is provided with an annular projection 59 which is fitted into the cutout portion 55. By fitting the annular projections 58 and 59 into the cutouts 55, the inner peripheral portion of the intermediate base portion 51 is sandwiched between the annular projections 58 and 59, and both are integrally assembled, so that the axial projection is completely prevented. Be done.

The manufacture and assembly of the sleeve main body 50 and the nipple main body 57 having the above-described structure are basically the same as those of the first embodiment, and the annular groove 30 is replaced by the notch 55, and the flange-shaped joint 35 is formed. The only difference is that annular protrusions 58 and 59 are used instead of the annular bulging portion 37. That is, after cold forging to form an intermediate part having the sleeves 25 on both sides of the base 51 (see FIG. 2 (a)), as shown in FIG. 6, a clip is attached to the outer peripheral surface of the intermediate base 51 by cutting. An annular groove 60 is provided, a nipple insertion hole 53 is formed in the shaft center portion, and a notch 55 is formed. On the other hand, in the nipple body 57, a partition wall is first provided by cold forging at a predetermined position inside the middle of the left and right nipples 61, and an intermediate part in which an annular projection 58 is projected on an outer peripheral surface displaced by a predetermined dimension from the partition wall. After being formed, a through hole is provided in the partition wall to form an intermediate part 57a having a thick wall part 59a in the partition wall (see FIG. 7).

To assemble the sleeve main body 50 and the nipple main body 57 having the above-described configuration, as shown in FIG. 4, the nipple intermediate component 57a is inserted into the nipple insertion hole 53 of the sleeve main body 50, and the annular protrusion 58 is formed into one notch. Fit into the part 55. Next, when the expansion die inserted into the nipple is pulled out to the other side, the thick portion 59a expands in diameter and bulges outward to form an annular projection 59, which is fitted into the other notch 55. In the above structure, the inner peripheral portion of the intermediate base portion 51 is held by the annular protrusions 58 and 59 and assembled together.

In the above embodiment, the diameter of the thick wall portion 40 and the thick wall portion 59a was expanded by the expansion die, but it may be expanded by an air gun or the like instead of the expansion die. Further, the flange-shaped joint portion of the nipple body can be omitted as appropriate.

[0017]

[Effect of device]

 According to this invention, the separately molded sleeve body and nipple body can be reliably assembled, and since the joint surface does not come into direct contact with the fluid, permeation of the fluid can be prevented and high sealing performance can be obtained. In addition, since the intermediate parts to be split-molded can be molded by cold forging and cutting, the processing cost can be reduced and no special welding technology or welding equipment is required. Furthermore, since no heat is used for assembly, any material can be selected.

[Brief description of drawings]

FIG. 1 is a side view showing a cross section of an upper half of an intermediate joint fitting 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 showing a method of assembling the sleeve main body and the nipple main body in a cross section of the upper half.

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

FIG. 6 is a side view of the upper half of the sleeve body showing an intermediate part of the sleeve body in section.

FIG. 7 is a side view of the upper half of the nipple body, showing an intermediate part of the body.

FIG. 8 is a side view in which an upper half of an intermediate joint fitting by a conventional cutting process is cross-sectioned.

FIG. 9 is a side view showing a cross section of an upper half of an intermediate joint fitting in which a conventional nipple is welded.

[Explanation of symbols]

 20 Sleeve Main Body 21 Nipple Main Body 23 Intermediate Base 25 Sleeve 29 Circular Groove for Clip 30 Annular Groove 31 Nipple Insertion Hole 33 Intermediate Base Side 35 Flange-like Joint 37 Annular Swelling 39 Nipple 50 Sleeve Main Body 51 Intermediate Base 53 Nipple Insertion Hole 55 Notch 57 Nipple body 58 Annular protrusion 59 Annular protrusion 61 Nipple

Claims (1)

[Scope of utility model registration request] 1. An intermediate joint fitting comprising a sleeve body and a nipple body, which are separately formed, and which are integrally fixed to each other, wherein the sleeve body has at least one annular fitting portion at an axial center portion of an intermediate base portion provided with sleeves on both sides. A hose intermediate joint fitting, characterized in that the formed nipple insertion hole is provided, and that the nipple body has an annular bulging portion which fits the annular fitting portion in an intermediate portion of the nipple provided on both sides.