JPH1113962A - Piping connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a connector in common by forming the shaft part of a sheet union provided between the connector and piping and a sealing part in coaxial and nearly cylindrical shapes and using the inner peripheral edge of the opening end of the sealing part as an R-shaped sealing surface so as to deal with piping lines having different end shapes by the sheet union. SOLUTION: For connecting piping to the pump 9 of a power steering device or the like by a connector 1, the shaft part 51 of a sheet union 5 is pressed into the small diameter part 22 of the sheet union loading part of the connector 1, and then piping 3 is fixed to the sheet union loading part by a nut 7. At this time, the bead part 33 of the piping 3 is held and fixed between the sealing part 53 of the sheet union 5 and the nut 7, and an O ring 34 is held between the recessed part 32 of the piping 3 and the sealing surface 55 of the sealing part 53 to hold liquid sealing. Also, by using the inner peripheral surface of the opening end 54 of the sealing part 53 of the sheet union 5 as an R-shaped sealing surface 55, piping different from the piping 3 is fixed by the same connector 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting device for connecting a pipe to a fluid device such as a power cylinder or a pump of a hydraulic power steering device.

[0002]

2. Description of the Related Art As a conventional pipe connection device, there is one as shown in FIG. Reference numeral 101 denotes a connector provided at a port or the like of a power cylinder (not shown). The connector 101 has a communication hole inside, one end of which is connected to the port of the power cylinder, the other end is connected to the seat union mounting portion 201, and the seat union mounting portion 201 has an open end. Large diameter part 2 from the side
11, a small diameter portion 221 is formed. Reference numeral 600 denotes a seat union which is mounted in the seat union mounting portion 201 of the connector 101, and includes a shaft portion 610 and an umbrella-shaped seal portion 630. The shaft portion 610 is attached to the small diameter portion 221 of the seat union mounting portion 201. It is press-fitted. 4
Reference numeral 00 denotes a pipe having a flare portion 410 having the same inclination angle as that of the seal portion 630 at its tip. The seal portion 630 of the seat union 600 and the flare portion 410 of the pipe 400 are connected to the large diameter portion 21 of the seat union mounting portion 201.
The screw is fastened together by a flare nut 800 screwed into the nut 1. The piping connection device having such a configuration is hereinafter referred to as a flare type.

[0003] The flare type piping connection device has been described above, but there is also a type using piping having a different end shape from the above-mentioned flare type depending on the requirements of the customer. This connection of the piping requires various changes to the configuration of the flare type, which is shown in FIG. Piping 300
The enlarged diameter portion 310, the constricted portion 3
20, a bead portion 330 is formed, and the constricted portion 32 is formed.
The O-ring 340 is mounted on the outer periphery of the “0”. Accordingly, the connector 100 also differs from the flare type connector in that the small-diameter portion 220 for receiving the enlarged-diameter portion 310 and the constricted portion 320 of the pipe 300, the large-diameter portion 210 into which the nut 700 is screwed, and the small-diameter portion 220 An R-shaped sealing surface 240 connecting the large-diameter portion 210 is formed. The pipe 300 is connected to the connector 100 by the nut 700.
At this time, the bead portion 330 of the pipe 300 is sandwiched and fixed between the step portion of the large-diameter portion 210 of the connector 100 and the nut 700, and the O-ring 340 is fixed.
Is sandwiched between the constricted portion 320 of the pipe 300 and the sealing surface 240 of the connector 100 to maintain liquid tightness. The pipe connection device having such a configuration is hereinafter referred to as O
It is called a ring type.

[0004]

As described above, in the conventional pipe connection device, a plurality of types of connectors must be prepared in accordance with the type of the pipe to be used. Man-hour is large and relatively expensive. As a result, not only the cost of the connector and the piping connection device itself including the connector itself, but also the cost increases due to an increase in the number of product types of the main body device such as the power steering device. This is a serious drawback in a business format where it is essential to reduce costs by sharing parts, such as in the automotive field.

[0005]

In order to solve the above problems, according to the present invention, a communication hole is provided inside, and one end of the communication hole is formed with a large diameter portion and a small diameter portion from the front end side. It consists of a connector that is a seat union mounting part, a shaft part, and a seal part with a larger diameter than this. This shaft part is inserted between the connector and the pipe with the shaft part inserted into the small diameter part of the seat union mounting part. In a pipe connection device comprising an interposed seat union and a nut screwed into the connector and fixing a pipe to the connector, a shaft portion and a seal portion of the seat union are coaxial and substantially cylindrical, and a seal portion is provided. The inner peripheral edge portion of the opening end of the first embodiment has an R-shaped sealing surface.

More specifically, a projection is formed on the outer periphery near the connection side end and a pipe having a seal ring attached thereto and a fluid device are connected to a shaft portion and a larger-diameter seal. This shaft portion is inserted into the small diameter portion of the seat union mounting portion, and is interposed between the connector and the pipe while the opening end of the seal portion is in contact with the ridge of the pipe. Using a seat union, the shaft portion and the seal portion of the seat union are coaxial and have a substantially cylindrical shape with different outer diameters, and the inner peripheral edge of the open end of the seal portion is sandwiched by a seal ring between the pipe and the pipe. The seal surface has a shape.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. 1 is, for example, a pump 9 of a power steering device.
This shows a connector that is attached to the connector and connects the piping to it. The connector 1 is the same as the conventional flare type connector 100, and has a communication hole 11 therein.
One end is connected to the pump 9 of the power steering device, and the other end is connected to the seat union mounting portion 2. The seat union mounting portion 2 has a large diameter portion 21 from the opening end side,
A small diameter portion 22 is formed, and a screw portion 23 is formed on the inner periphery of the large diameter portion 21 within a predetermined range from the opening end side.

Reference numeral 3 denotes a so-called O-ring type pipe connected to the connector 1. The pipe 3 has an enlarged diameter portion 31 and a constricted portion 3 having a smaller diameter than the one end.
2. It has a bead portion 23 as a ridge, and an O-ring 34 as a seal ring is mounted on the outer periphery of the constricted portion 32. Reference numeral 5 denotes a seat union interposed between the connector 1 and the pipe 3. The seat union 5 comprises a shaft portion 51 inserted into the small-diameter portion 22 of the connector 1 and a seal portion 53 having a larger outer diameter. These 51 and 53 are coaxial and substantially cylindrical. A part of the shaft part 51 is a press-fit part 52 having a slightly larger outer diameter than the other part, and an inner peripheral edge of the open end 54 of the seal part 53 is an R-shaped seal surface 55. This sheet union is made of, for example, brass.

The assembled state of the above members will be described below. Small diameter section 2 of sheet union mounting section 2 of connector 1
2, the shaft 51 of the seat union 5 is
It is press-fitted. Next, the pipe 3 is tightened by a nut 7 screwed into the seat union mounting portion 2 of the connector 1. At this time, the bead 33 of the pipe 3 is connected to the seal 53 of the seat union 5 and the nut 7.
The O-ring 34 is fixed between the pipe 3
It is sandwiched between the constricted portion 32 and the sealing surface 55 of the sealing portion 53 to maintain liquid tightness.

In the above, the configuration in which the so-called O-ring type pipe 3 is fixed to the connector 1 according to the embodiment of the present invention has been described. However, a so-called flare type pipe different from this pipe 3 is also fixed to the same connector 1. It is possible to This is a known configuration, but is shown in FIG. 2 for reference. Numeral 4 is a so-called flare type pipe, which has a flare portion 41 at the tip thereof having the same inclination angle as a cone portion 63 of the seat union 6 described later. Reference numeral 6 denotes a seat union, which comprises a shaft portion 61 and an umbrella-shaped seal portion 63, similarly to the conventional seat union 600. The annular tapered portion of the seal portion 63 is a seal surface 64 that abuts against the flare portion 41 of the pipe 4 to maintain liquid tightness, and a portion of the shaft portion 61 has a slightly larger outer diameter than other portions. It is a press-fit portion 62. The sheet union 6 is made of, for example, brass.

In the seat union 6, the press-fit portion 62 of the shaft portion 61 is press-fitted into the small-diameter portion 22 of the seat union mounting portion 2 of the connector 1. Then, the flare portion 41 of the pipe 4 and the seal portion 63 of the seat union 6 are connected to the nut 8 screwed into the seat union mounting portion 2 of the connector 1.
Are tightened together. Thus, the pipe 4 is fixed to the connector 1 while maintaining liquid tightness with the seal portion 63 of the seat union 6.

That is, the seat union 5 according to this embodiment
In this way, the sheet union 5 and the well-known sheet union 6 can be selected and used according to the shape of the end of the pipe. , 4 became possible.

[0013]

By devising the seat union according to the present invention, it is possible to use it in combination with a known seat union and to select and use the seat union as appropriate. Piping compatibility, realizing pipe compatibility. Therefore, if the pipe connection device according to the present invention is used, pipes having different end shapes can be handled with a relatively inexpensive sheet union, and the shape is complicated and the number of processing steps is large.
Expensive connectors can be shared. That is, it is possible to provide an inexpensive pipe connection device that achieves cost reduction by using common parts.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an O-ring type pipe connection device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a flare type pipe connection device used as a reference for describing an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a flare type among conventional techniques.

FIG. 4 is a cross-sectional view of an O-ring type among conventional techniques.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector 11 Communication hole 2 Seat union mounting part 21 Large diameter part 22 Small diameter part 23 Screw part 3 Pipe 31 Large diameter part 32 Constriction part 33 Bead part 34 O-ring 5 Sheet union 51 Shaft part 52 Press fitting part 53 Seal part 54 Open end 55 Sealing surface 7 Nut

Claims (3)

[Claims] 1. A connector having a communication hole therein, one end of which is a seat union mounting portion having a large-diameter portion and a small-diameter portion formed from the tip end thereof, a shaft portion and a connector. A seat union interposed between the connector and the pipe with this shaft part inserted into the small-diameter part of the seat union mounting part, screwed into the connector, and In a pipe connection device comprising a nut for fixing a pipe, a shaft portion and a seal portion of the seat union are coaxial and substantially cylindrical, and an inner peripheral edge of an open end of the seal portion is an R-shaped seal surface. A pipe connection device. 2. A pipe connecting apparatus for connecting a pipe having a seal ring attached to an outer periphery near an end on a connection side to a fluid device, the communication apparatus having a communication hole inside, and one end of the communication hole is connected to the front end thereof. A connector having a large-diameter portion and a small-diameter portion formed as a seat union mounting portion, a shaft portion and a seal portion having a larger diameter than this, and this shaft portion is inserted into the small-diameter portion of the seat union mounting portion. A seat union interposed between the connector and the pipe in a state where the connector is connected, and a nut screwed into the connector and fixing the pipe to the connector.
The shaft portion and the seal portion of the seat union are coaxial and have a substantially cylindrical shape with different outer diameters, and the inner peripheral edge of the open end of the seal portion has an R-shaped sealing surface for sandwiching a seal ring with the pipe. A pipe connection device, characterized in that: 3. A pipe connection device for connecting a fluid pipe with a pipe having a projection formed on an outer periphery near a connection-side end and having a seal ring mounted therein and having a communication hole therein. One end of the hole consists of a connector with a seat union mounting part formed with a large diameter part and a small diameter part from the tip side, a shaft part and a seal part with a larger diameter than this.
The shaft portion is inserted into the small-diameter portion of the seat union mounting portion, and the seat union is interposed between the connector and the pipe with the open end of the seal portion abutting against the ridge of the pipe; It consists of a nut that is screwed into the connector and fixes the pipe to the connector. The shaft and the seal of the seat union are coaxial and substantially cylindrical with different outer diameters, and the inner peripheral edge of the open end of the seal is A pipe connection device having an R-shaped sealing surface for holding a seal ring between the pipe and the pipe.