JP2004245368A - Whirle-stop structure of hose connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact whirle-stop structure capable of stopping movement of a hose connector against rotation force generated when inserting a hose into the hose connector to eliminate loosening of the hose connector. <P>SOLUTION: In an aluminum-made connector housing 1 provided with a flange part 4 having a bolt hole 10 through which a bolt 15 passes and pressed-in boss parts 5, 6 in which one end sides of the hose connectors 7, 8 having a bent part are pressed in, two upper and lower whirle-stop parts 11, 13 capable of regulating movement of the hose connectors 7, 8 against rotation force generated when inserting the hose 18 into the other end sides of the hose connectors 7, 8 are formed by protruding in the vertical direction for the flange part 4. The lower whirle-stop part 13 is formed integrally with a bolt hole boss part 9 of the bolt hole 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hose connector detent structure.
[0002]
[Prior art]
In an internal combustion engine such as a gasoline engine or a diesel engine for an automobile or an industrial machine, a hose connector to which a hose for flowing a fluid such as cooling water or lubricating oil is connected is, for example, a front view of FIG. It is configured as shown in a plan view.
In the drawing, for example, two passage spaces 2 and 3 through which cooling water can flow are formed in a connector housing 1, and a flange portion 4 having a mounting surface 4a to be attached to a cylinder head or the like, a press-fit boss portion 5 and One end of a hose connector 7 having a bent portion 7a is press-fitted into the press-fit boss portion 5, and one end of a hose connector 8 having a bent portion 8a is press-fitted into the press-fit boss portion 6. It has a fixed structure.
[0003]
As another structure, as shown in a front view in FIG. 14 and a plan view in FIG. 15, there is a structure in which a straight pipe-shaped hose connector is fixed.
That is, in FIGS. 14 and 15, the connector housing 1 is integrally formed with the boss portions 51 and 52 projecting perpendicularly to the flange portion 4, and the press-fit portions 51 a and 52 a are respectively formed on the boss portions 51 and 52. It is formed substantially parallel to the flange portion 4, and has a structure in which straight pipe-shaped hose connectors 7, 8 are press-fitted into the press-fit portions 51a, 52a.
Conventionally, there is also a structure as disclosed in Patent Document 1.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-295763
[Problems to be solved by the invention]
In the conventional structure shown in FIGS. 12 and 13, as shown in FIG. 12, when the hose 18 is inserted into the hose insertion portion 7b formed on the other end of the hose connector 7, for example, When the hose 18 is inserted, a rotational force is generated by the moment in the hose connector 7 at the time of insertion, and there is a problem that the portion of the hose connector 7 press-fitted into the press-fit boss portion 5 is loosened. Similarly, the hose connector 8 also has a problem in that when the hose 18 is inserted, a rotational force is generated and the hose 18 is loosened.
If the length of the hose insertion portion 7b is reduced so that a large moment is not generated, sufficient watertightness cannot be obtained when the hose 18 is inserted, so that the dimension of the hose insertion portion 7b is shortened. You cannot do it.
[0006]
In order to prevent the rotation of the hose connector 7, there is a method of setting a longer press-fitting length with respect to the press-fitting boss portion 5. However, if the press-fitting length is made longer, the protrusion amount of the hose connector 7 becomes large, and the weight increases. It becomes heavy, causing problems such as interference with surrounding components.
Alternatively, in order to prevent the rotation of the hose connector 7, if the press-fitting tightening margin for the press-fit boss portion 5 is increased, the difference in the coefficient of thermal expansion between the press-fit boss portion 5 and the hose connector 7 is made of aluminum. This causes a problem that the press-fit portion of the hose connector 7 into the press-fit boss portion 5 at high temperature is plastically deformed.
Therefore, there is a limit to increasing the press-fitting length and increasing the press-fitting allowance. When inserting the hose 18 into the hose insertion portion 7b of the hose connector 7, a large moment acts. Then, the press-fitting portion of the hose connector 7 into the press-fitting boss portion 5 rotates and becomes loose.
[0007]
Further, in the case of the conventional straight pipe-shaped hose connector 7 as shown in FIGS. 14 and 15, when the hose 18 is inserted, the press-fit portion of the hose connector 7 does not rotate and becomes loose, but the boss Since the portions 51 and 52 are integrally formed in a protruding shape, the number of processing surfaces of the entire connector housing 1 increases, the processing time increases, and the cost increases. Since the number of parts increases, it is necessary to devise a casting method to prevent the occurrence of burrows in the thick part, and there is a problem that the cost increases.
[0008]
[Means for Solving the Problems]
The present invention has been made in view of the above-described conventional problems, and does not loosen the hose connector when the hose is inserted, increases the weight of the connector housing, and causes interference with surrounding components. The first gist of the present invention is to provide a hose connector having a compact structure and a detent structure, and the first gist is to press-fit one end of a hose connector having a bolt hole through which a bolt is passed and a hose connector having a bent portion. A connector housing made of aluminum having a press-fit boss portion can restrict the movement of the hose connector against a rotational force generated when a hose is inserted into the other end of the hose connector. Two upper and lower detents having an opening of about 3 ° are formed so as to protrude in a direction perpendicular to the flange, and a lower detent is provided on the flange. It is formed integrally with the boss of the bolt hole.
[0009]
A second gist is that the two upper and lower detent portions are arranged within an angle range of 120 ° or less with respect to the center of one end of the hose connector into which the press-fitting is performed.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of the first embodiment, and FIG. 2 is a plan view thereof. FIG. 3 is a sectional view taken along line AA of FIG. 1, and FIG. 4 is a sectional view taken along line BB of FIG.
[0011]
In the figure, a connector housing 1 is formed by casting aluminum, and inside thereof, passage spaces 2 and 3 through which cooling water passes are defined. Further, a flange portion 4 having a mounting surface 4a to be mounted on the cylinder head is integrally formed, and the flange portion 4 has five bolt holes 10, 10, 10, 10, 10, 10 for passing mounting bolts. Are formed to penetrate, and the outer periphery of each bolt hole 10 is a bolt hole boss portion 9.
[0012]
Further, the connector housing 1 communicates with the passage space 2 and projects perpendicularly to the flange portion 4, and the press-fit boss portion 5 communicates with the passage space 3 and projects perpendicularly to the flange portion 4. The press-fit boss 6 is integrally formed. One end of the hose connector 7 is press-fitted into the press-fit boss 5, and one end of the hose connector 8 is press-fitted into the press-fit boss 6. Another straight pipe 16 is press-fitted into the passage space 3 in a communicating manner.
[0013]
Each of the hose connectors 7 and 8 has a bent portion 7a, 8a, and is formed of an iron-based pipe bent in a substantially elbow shape. The other end of each of the hose connectors 7 and 8 has a flange portion. Hose insertion portions 7b and 8b extending substantially in parallel with 4 are formed, and the hose 18 can be inserted into the hose insertion portions 7b and 8b. The length of the hose insertion portions 7b and 8b is set to 20 mm or more.
Further, flanges 7c, 8c are formed on the sides that are press-fitted into the press-fit boss portions 5, 6, and a press-fitting jig 20 described below is brought into contact with the flanges 7c, 8c, and It is press-fitted.
[0014]
Further, the connector housing 1 is integrally formed with an upper detent portion 11 and a lower detent portion 13 so as to protrude in the vertical direction with respect to the flange portion 4, respectively, as shown in the sectional views of FIGS. Between the upper detent part 11 and the lower detent part 13, a fitting recess 14 is formed, which is open at 1 ° to 3 °, into which the hose connectors 7 and 8 can be fitted, and is sandwiched in the fitting recess 14. In this state, the hose connectors 7 and 8 are stopped and held. That is, the detent part constituted by the upper detent part 11 and the lower detent part 13 has an opening of 1 ° to 3 °, and the hose connectors 7 and 8 can be positioned during this. It can regulate movement.
A reinforcing rib 12 is formed integrally with the upward rotation preventing portion 11, and the thickness of the upward rotation preventing portion 11 is set to be thin by the reinforcing rib 12. Further, a bolt hole boss portion 9 formed so as to project perpendicularly to the flange portion 4 is continuously integrated with the lower rotation preventing portion 13.
[0015]
That is, as shown in the perspective view of FIG. 5, the lower rotation preventing portion 13 and the bolt hole boss portion 9 project in parallel with the press-fit boss portions 5 and 6 (perpendicular to the flange portion 4), and are integrally formed. A bolt hole 10 is formed in the hole boss portion 9 and penetrates toward the mounting surface 4a. A high-tension iron-based mounting bolt 15 is passed through the bolt hole 10, and the mounting bolt 15 is a cylinder (not shown). The connector housing 1 is attached to the cylinder head by being tightened to the head.
[0016]
In addition, as shown in FIG. 1, the upper and lower two detents 11 and the detents 13 are within an angle range of 120 ° or less with respect to the center 7 d on one end side of the hose connector 7 which is press-fitted into the press-fit boss 5 of the hose connector 7. Are located. The arrangement within the range of 120 ° or less is the same for the upper rotation stopper 11 and the lower rotation stopper 13 on the hose connector 8 side.
That is, the upper rotation stopper 11 and the lower rotation stopper 13 are formed integrally with the connector housing 1 in a compact manner so as to fall within an angle range of 120 ° or less.
For this reason, as shown in FIG. 5, when press-fitting one end of the hose connector 7 into the press-fitting boss 5 using the press-fitting jig 20, the opening angle of the opening 20a of the press-fitting jig 20 is set to 120 ° or less. Is what you can do.
A pressing surface 20c is formed on the outer periphery of the bottom hole 20b of the press-fitting jig 20, and the pressing surface 20c contacts the flange 7c of the hose connector 7 so that the hose connector 7 can be pressed into the press-fit boss 5 side. Things.
[0017]
FIG. 6 is an operation explanatory view in which the flange 7c is pressed toward the press-fit boss 5 by the press-fitting jig 20 to press-fit one end into the press-fit boss 5. FIG. 7 is a plan view of FIG. It is a block diagram.
As described above, when press-fitting, the press-fitting jig 20 can perform the press-fitting operation well without interfering with the upper rotation stopper 11 and the lower rotation stopper 13. 13 is arranged within an angle range of 120 ° or less, the opening 20a of the press-fitting jig 20 is also opened at an angle of 120 ° or less, and the pressing surface 20c contacts the flange 7c of the hose connector 7 with a large area. Thus, it is possible to press-fit well.
[0018]
That is, when the opening 20a of the press-fitting jig 20 is an opening having an angle of about 180 °, for example, as shown in FIG. When press-fitting, the hose connector 7 is inclined as shown in FIG. 9 and may be obliquely press-fitted into the press-fit boss portion 5 as shown in FIG. And a good press-fit state can be obtained.
[0019]
The same effect can be obtained on the hose connector 8 side. That is, since the upper detent portion 11 and the lower detent portion 13 are compactly arranged within an angle range of 120 ° or less, the press-fitting jig 20 is brought into contact with the flange portion 8c over a wide area, and the hose connector 8 is properly slid. Press-fitting work can be performed.
In addition, since the upper detent portion 11 and the lower detent portion 13 are compactly arranged within an angle range of 120 ° or less, when casting integrally with the connector housing 1, a decrease in strength due to burrows or the like is prevented. It is not necessary to take measures to prevent this, and it is possible to suppress the increase in weight and to reduce the cost of material and manufacture the device with reduced cost.
[0020]
As shown in FIG. 1, when the hose 18 is inserted into the hose insertion portion 7b of the hose connector 7, the operation is performed from the upper side. Since a large force is applied to the stopper 13, the strength of the lower rotation stopper 13 must be sufficient. However, the lower rotation stopper 13 is integrated with the bolt hole boss 9, and the mounting bolt 15 is Since the mounting bolt 15 has an iron-based high tension, the presence of the high-strength bolt 15 inside the lower rotation preventing portion 13 reduces the force acting on the hose connector 7. Thus, sufficient strength can be secured.
That is, the aluminum lower stopper 13 is strong against compressive force, and the mounting bolt 15 exerts its strength against bending force and pulling force, so that sufficient strength can be secured as a whole. Become.
[0021]
In the modification shown in the front view of FIG. 10, the arrangement of the lower rotation preventing portion 13 on the hose connector 8 side is changed.
Also in this case, the upper and lower detent portions 11 and 13 are arranged within an angle range of 120 ° or less with respect to the center 8d on one end side which is press-fitted into the press-fit boss portion 6 of the hose connector 8.
[0022]
In FIG. 10, the contact surface of the lower rotation stopper 13 that contacts the hose connector 8 is inclined, and the operation will be exaggeratedly described with reference to the schematic diagram of FIG. 11.
In FIG. 11, a line A connecting the center of the contact surface 13a of the lower rotation stopper 13 with the hose connector 8 and the axis of the bolt hole 10 is at an angle θ with respect to a line W perpendicular to the center of the contact surface 13a. Is set to 26 ° or less.
[0023]
That is, when the hose is inserted into the hose insertion portion 8b of the hose connector 8, the hose connector rotation force W due to the work from above the engine room is applied to the center of the contact surface 13a of the lower rotation preventing portion 13 with the hose connector 8 and the bolt. This is the resultant force of the component of the line A connecting the axis of the hole 10 and the component B perpendicular to the line A. At this time, if θ is 26 ° or less, the component B is 1/2 or less of the component A. Therefore, the bending destructive force due to the component B applied to the lower stopper 13 can be suppressed to a small value. (The effect of receiving the pulling force by the mounting bolt 15 and receiving the compressive force by the aluminum constituting the lower rotation stopper 13 is sufficiently obtained.) Therefore, the lower rotation stopper 13 is freely arranged within the range of 0 ° to 26 °. And the degree of freedom of arrangement increases.
[0024]
【The invention's effect】
The detent structure of a hose connector according to the present invention includes a hose connector having an aluminum connector housing having a flange portion having a bolt hole through which a bolt passes and a press-fit boss portion into which one end of the hose connector having a bent portion is press-fitted. The upper and lower detents having an opening of 1 ° to 3 ° that can restrict the movement of the hose connector against the rotational force generated when the hose is inserted into the other end of the The lower detent part is formed integrally with the boss of the bolt hole of the flange part, so that the hose connector is positioned well between the upper and lower detent parts, The movement of the hose connector can be restricted, so that when the hose is inserted into the other end of the hose connector, a particularly strong force is applied inside the lower detent. In the above, a bolt is passed through the bolt hole, and a strength against a large bending force and a tensile force is obtained by the bolt, and a strength enough to withstand a large rotation force is secured. At the same time, the lower stopper portion can be formed in a compact size, loosening of the hose connector can be reliably suppressed, and the size and weight can be reduced to reduce the cost.
[0025]
Further, the upper and lower detents are arranged within an angle range of 120 ° or less with respect to the center of the one end of the hose connector into which the press-fitting of the hose connector is performed. The hose connector can be formed as a single unit, reducing the overall weight and reducing the cost.In addition, when the hose connector is pressed into the boss, the press-fitting jig can be brought into contact with a large area to perform the press-fitting operation. Thus, it is possible to prevent the hose connector from being press-fitted in a state inclined with respect to the press-fit boss portion.
[Brief description of the drawings]
FIG. 1 is a front configuration diagram of a connector housing according to a first embodiment.
FIG. 2 is a plan view of FIG.
FIG. 3 is a sectional view taken along line AA of FIG. 1;
FIG. 4 is a sectional view taken along the line BB of FIG. 1;
FIG. 5 is an exploded perspective view of a main part of an upper detent part and a lower detent part and a press-fitting jig.
FIG. 6 is a work state diagram of press-fitting a hose connector into a press-fit boss by a press-fitting jig.
FIG. 7 is a sectional view taken along the line AA of FIG. 6;
8 is a cross-sectional configuration diagram taken along the line AA of FIG. 9 corresponding to FIG. 7 showing a failure example.
FIG. 9 is a work explanatory diagram corresponding to FIG. 6 showing a failure example.
FIG. 10 is a front view of the connector housing of the second embodiment.
FIG. 11 is a distribution configuration diagram of a force acting on a lower rotation stopping portion.
FIG. 12 is a front view of a conventional connector housing.
FIG. 13 is a plan view of FIG.
FIG. 14 is a front view of still another conventional connector housing.
FIG. 15 is a plan view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Connector housing 2, 3 Passage space 4 Flange part 4a Mounting surface 5, 6 Press-fit boss part 7, 8 Hose connector 7a, 8a Bent part 7b, 8b Hose insertion part 7c, 8c Flange part 9 Bolt hole boss part 10 Bolt hole DESCRIPTION OF SYMBOLS 11 Upper detent part 12 Reinforcement rib 13 Lower detent part 13a Contact surface 14 Fitting recess 15 Mounting bolt 20 Press-in jig 20a Opening 20c Pressing surface

Claims (2)

A hose is inserted into the other end of the hose connector in an aluminum connector housing having a flange portion having a bolt hole through which bolts are inserted and a press-fit boss portion into which one end of a hose connector having a bent portion is press-fitted. The upper and lower detents having an opening of 1 ° to 3 ° that can restrict the movement of the hose connector against the rotational force generated when the And a lower locking portion formed integrally with a boss portion of the bolt hole of the flange portion. 2. The hose connector according to claim 1, wherein the two upper and lower detent portions are arranged within an angle range of 120 ° or less with respect to a center of one end side of the hose connector into which the hose connector is pressed. 3. Stop structure.

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