JP2018017330A - Packing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing for use in connecting a first shell having a first through-hole of non-right circular shaped large diameter having a major axis and a minor axis that are oppositely faced against to each other with a second shell having a second through-hole of small diameter of non-right circular shaped small diameter to enable a relative positional displacement in a radial direction and a relative positional displacement in an axial direction to be absorbed and at the same time to keep a sealability even if an inner fluid pressure is high or even if a high fluid pressure is applied from outside.SOLUTION: A connecting part C between a first shell T1 and a second shell T2 has a shell part D in a first through-hole A. There are provided a first connecting body 1 including a metallic first core grid 11 and a rubber first coating body 4 that is fitted to an inner peripheral surface E of a wall forming the first through-hole A; a second connecting body 2 including a metallic second core grid 12 and a rubber second coating body 5 that is fitted to an outer peripheral surface G of the shell part D; and a rubber connecting body 3 connecting the connecting bodies 1, 2, integrally formed with the coating bodies 4, 5 and having a substantial U-shaped section cut at a plane including an axial direction and a radial direction.SELECTED DRAWING: Figure 1

Description

  The present invention includes a first tubular body having a non-circular first large-diameter hole having a major axis and a minor axis, and a non-circular shape having a major axis and a minor axis. It is related with the packing which connects the 2nd tubular body which has the 2nd small diameter through-hole.

In order to save space, a non-circular through hole having a major axis and a minor axis, such as an oval, an ellipse, or a rounded rectangle, is used as a through hole for inserting wiring and piping (for example, The through-hole 5 of Patent Document 1 and the through-hole 11 of Patent Document 2 are used as oval-shaped through holes).
Here, the sealing structure of the piping for automobiles in Patent Document 2 includes the inner piping 4 in the cooler unit case 2 attached to the interior side of the dash panel 1 that partitions the compartment CR and the exterior ER, The outer pipe 7 of another device is connected by a block connector 6 for pipe connection whose radial cross-sectional shape is oval. The seal base 12 of the oval ring-shaped EPDM packing material 10 held by the block connector 6 through the protrusion 14 that contacts the outer peripheral surface of the block connector 6 is connected to the oval-shaped through hole of the panel 1. 11 and the case 2 are sandwiched between the panel 1 and the case 2 at a radially outward position of the oval opening 2a.

Utility Model Registration No. 2530435 JP-A-10-86651

Since the packing material 10 in the seal structure as in Patent Document 2 holds the sealing performance by sandwiching the axial front and rear of the seal base 12 between the dash panel 1 and the cooler unit case 2, the shaft between the members to be connected When the relative positional deviation in the direction is large, it is difficult to absorb the positional deviation.
In addition, a first tubular body having a non-circular first large-diameter through-hole having a major axis and a minor axis, which are arranged opposite to each other, and a non-circular shape having a major axis and a minor axis. When the second pipe body having the second small-diameter hole is connected by packing to form a liquid or gas flow path, the EPDM packing material having a structure as in Patent Document 2 has a high internal fluid pressure. In some cases or when high fluid pressure is applied from the outside such as a high-pressure washing machine, the sealing performance may not be maintained.

  Therefore, in view of the above-described situation, the present invention intends to solve the first tubular body having a non-circular first large-diameter hole having a major axis and a minor axis, which are arranged to face each other. Absorbs the relative displacement in the radial direction and the relative displacement in the axial direction in the packing that connects the second tubular body having the second through hole with a small diameter and a non-circular shape having a major axis and a minor axis. It is possible to provide a packing that can maintain sealing performance even when the internal fluid pressure is high or when a high fluid pressure is applied from the outside.

In order to solve the above problems, the packing according to the present invention is
A first tubular body having a first non-circular large-diameter first hole having a major axis and a minor axis, and a first non-circular small-diameter having a major axis and a minor axis. A packing connecting a second tubular body having two through holes,
The connecting portion of the first tubular body and the second tubular body is formed by inserting the tubular portion of the second tubular body into the first through hole of the first tubular body,
A first metal core that fits on an inner peripheral surface of a wall that forms the first through hole of the first tubular body, and a first cover body made of rubber that covers the first core metal. Connected body,
A second connector including a metal second cored bar and a rubber second coated body covering the second cored bar, which are fitted to the outer peripheral surface of the pipe part of the second pipe;
A cross section cut along a plane including the axial direction and the radial direction, which is integral with the first covering body and the second covering body, connecting the first connecting body and the second connecting body. A connected body of
It is characterized by providing.

According to such a configuration, in a state where the first connecting body is fitted to the inner peripheral surface of the wall forming the first through hole of the first tubular body, the metal first metal core of the first connecting body is The rubber first cover is pressed against the inner peripheral surface of the wall forming the first through hole of the first tubular body via the rubber first cover covering the first core metal, and the rubber first cover is the inner peripheral surface. Close contact with.
Moreover, in the state which fitted the 2nd connection body to the outer peripheral surface of the pipe part of a 2nd pipe body, the 2nd rubber | gum 2 coating | cover with which the metal 2nd metal core of a 2nd connection body coat | covers a 2nd metal core. The body is pressed against the outer peripheral surface of the tube portion of the second tubular body, and the second cover body made of rubber is in close contact with the outer peripheral surface.
Therefore, even when the internal fluid pressure is high or a high fluid pressure is applied from the outside, the sealing performance can be maintained.

In addition, the section cut along a plane including the axial direction and the radial direction, which is integral with the first rubber covering body of the first connecting body and the second rubber covering body of the second connecting body, is substantially U-shaped. The first connection body and the second connection body are connected by the rubber connection body.
Therefore, misalignment in various directions such as relative displacement in the radial direction, relative displacement in the axial direction, and relative displacement in the fall direction when the first tube and the second tube are assembled. , And can be absorbed by elastic deformation of the rubber-like connecting body having the shape described above.
Furthermore, even when the first tube and the second tube between the electromechanical devices are connected by packing, radial vibrations and axial vibrations that are always loaded in the operating state of the electromechanical devices. In addition, vibrations in various directions, such as vibrations in the falling direction, can be absorbed by elastic deformation of the rubber coupling body having the above shape.

Here, the first cored bar is attached to the inner peripheral surface of the wall forming the first through hole of the first tubular body via the first covering body, and A cross section cut along a plane including the axial direction and the radial direction, including a first flange portion extending radially outward, is attached to the axial end surface of the one tubular body via the first covering body. And
The second metal core includes a second cylinder portion that is attached to the outer peripheral surface of the tube portion of the second tube body via the second covering body, and a second flange portion that extends radially outward. The cross section cut along a plane including the axial direction and the radial direction is preferably substantially L-shaped.
According to such a configuration, since the first cored bar and the second cored bar have a substantially L-shaped cross section cut by a plane including the axial direction and the radial direction, the first cored bar and the second cored bar The radial rigidity is increased.
Therefore, even if the internal fluid pressure or the fluid pressure applied from the outside is higher, the first core metal and the second core metal are not easily deformed in the radial direction, so that the sealing performance is further improved.
In addition, since the first flange portion of the first metal core follows the axial end surface of the first tubular body via the first covering, the packing can be positioned in the axial direction.

Moreover, the part which coat | covers the outer peripheral surface of the said 1st cylinder part of a said 1st coating body equips the outer peripheral surface with a circumferential groove, and is the part which coat | covers the inner peripheral surface of the said 2nd cylinder part of a said 2nd coating body. More preferably, the inner circumferential surface is provided with a circumferential groove.
According to such a configuration, the rubber first covering body having the peripheral groove on the outer peripheral surface is in close contact with the inner peripheral surface of the wall forming the first through hole of the first tubular body in a state where the surface pressure is higher. In addition, since the second rubber covering body having a circumferential groove on the inner peripheral surface is in close contact with the outer peripheral surface of the pipe portion of the second tubular body in a state where the surface pressure is higher, it is applied from the internal fluid or the outside. Since the sealing action against the fluid pressure fluctuation is stabilized, the sealing performance is further improved.

Furthermore, it is still more preferable that the part which covers the said 1st flange part of a said 1st coating body is provided with the lip which protrudes toward the axial direction end surface of the said 1st pipe body.
According to such a configuration, the wedge-shaped cross-sectional lip of the first cover body made of rubber that covers the first flange portion of the first metal core protrudes toward the axial end surface of the first tubular body. Is in pressure contact with the axial end surface of the first tubular body, so that the sealing action against pressure fluctuations of the internal fluid and the fluid applied from the outside is further stabilized, so that the sealing performance is further enhanced.

As mentioned above, according to the packing which concerns on this invention, there exists an effect as mainly shown below.
(1) The inner peripheral surface of the wall in which the first metal core of the first connecting body forms the first through hole of the first tubular body via the first rubber cover that covers the first core. Since the metal second cored bar of the second connection body is pressed against the outer peripheral surface of the tube portion of the second tubular body through the rubber second coating body covering the second cored bar, Even when the internal fluid pressure is high or a high fluid pressure is applied from the outside, the sealing performance can be maintained.
(2) Misalignment in various directions, such as relative displacement in the radial direction, relative displacement in the axial direction, and relative displacement in the tilt direction when the first tube and the second tube are assembled. The section cut along the plane including the axial direction and the radial direction, which is integral with the rubber first covering body of the first connecting body and the rubber second covering body of the second connecting body, is substantially U-shaped. It can be absorbed by the elastic deformation of the rubber connector.
(3) Even when the first pipe body and the second pipe body are connected by packing between the electric machine devices, the radial vibration, the axial vibration, which are always loaded in the operation state of the electric machine device, In addition, vibrations in various directions, such as vibrations in the falling direction, can be absorbed by the elastic deformation of the rubber-made coupling body having the above shape.

(A) is the non-circular shape which has the 1st pipe body which has the non-circular-shaped large diameter 1st through-hole which has a long axis and a short axis, and the long axis and the short axis of the packing which concerns on embodiment of this invention. The longitudinal cross-section side view which shows the state with which the connection part of the 2nd tubular body which has a shape small diameter 2nd through-hole was mounted | worn, (b) is a principal part expansion vertical cross-section side view similarly. It is a fragmentary longitudinal cross-section perspective view which shows the packing which concerns on embodiment of this invention. (A) is a front view which shows the packing which concerns on embodiment of this invention, (b) is a rear view similarly. It is a front view which shows only a 1st metal core and a 2nd metal core. (A) is an end view taken along line AA in FIG. 3 (a), (b) is an end view taken along line BB in FIG. 3 (a), and (c) is a cross-sectional view taken along line C-- in FIG. 3 (a). It is a C-line cutting part end view. (A) is the XX sectional view taken on the line in FIG.3 (b), (b) is the YY sectional view taken on the line in FIG.3 (b).

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste.
The “non-circular shape having a major axis and a minor axis” in the present invention is an ellipse (a shape in which two circles having the same radius are connected by a common outer tangent), an ellipse, a rounded rectangle, or the like. Includes shapes close to.
In this specification, the pipe direction of the first tube body and the second tube body is referred to as “axial direction”, and the direction orthogonal to the axial direction is referred to as “radial direction”, from the second tube body toward the first tube body. The view seen from the axial direction is taken as the front view.

As shown in the longitudinal cross-sectional side view of FIG. 1 (a) and the main part enlarged vertical cross-sectional side view of FIG. 1 (b), the packings 10 according to the embodiment of the present invention are arranged to face each other. A first tubular body T1 having a first non-circular large-diameter first through hole A having a major axis and a minor axis, and a second non-circular small-diameter second hole B having a major axis and a minor axis. The second tubular body T2 is connected.
In the connection portion C between the first tubular body T1 and the second tubular body T2, the tubular portion D of the second tubular body T2 enters the first through hole A of the first tubular body T1.
Here, the first through hole A and the second through hole B are, for example, oval (a shape in which two circles having the same radius are connected by a common outer tangent).

FIG. 1 (a) is a longitudinal sectional side view, FIG. 1 (b) is an enlarged longitudinal sectional side view of the main part, FIG. 2 is a partial longitudinal sectional perspective view, FIG. 3 (a) is a front view, and FIG. As shown in the rear view of b), the packing 10 includes the first connecting body 1 and the second tubular body T2 that are fitted to the inner peripheral surface E of the wall forming the first through hole A of the first tubular body T1. The section cut by a plane including the axial direction and the radial direction connecting the second connecting body 2 fitted to the outer peripheral surface G of the tube portion D, and the first connecting body 1 and the second connecting body 2 is substantially U-shaped. The rubber-like coupling body 3 is provided.
The first connecting body 1 includes a first metal core 11 made of metal and a first cover body 4 made of rubber that covers the first core metal 11, and the second connecting body 2 is made of a second metal core 12 made of metal. And a second rubber covering 5 that covers the second metal core 12.
The connecting body 3 is formed integrally with the rubber first covering body 4 of the first connecting body 1 and the rubber second covering body 5 of the second connecting body 2.

The first metal core 11 and the second metal core 12 are made of metal such as stainless steel and are formed by press working.
Further, the first cover body 4 and the second cover body 5 made of rubber are integrated by being vulcanized and bonded to the first core metal 11 and the second core metal 12.

The vulcanization adhesion of the first cover 4 and the second cover 5 made of rubber to the metal cores 11 and 12 is performed by applying a thermosetting resin adhesive to a predetermined range of the surfaces of the metal cores 11 and 12. It can be performed by direct pressure molding (compression (vulcanization) molding) in which the core metal 11 and 12 is set in the coated and heated lower mold, and the upper mold is closed and the raw rubber material is pressurized and cured. .
Alternatively, in the vulcanization adhesion, a thermosetting resin adhesive is applied to a predetermined range of the surfaces of the metal cores 11 and 12, the cores 11 and 12 are set in the lower mold, and the upper mold is closed. In this state, it can also be performed by injection molding (injection (vulcanization) molding) in which a liquefied raw rubber material is filled into a cavity.

As the thermosetting resin adhesive, rubber vulcanized adhesives such as phenol resin adhesives and silane adhesives in general can be used.
As the rubber material, nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), acrylic rubber (ACM), ethylene / acrylic rubber (AEM), fluorine rubber (FKM) are used as a rubber material having good oil resistance. , FPM), silicone rubber (VQM), etc., one or two or more rubbers can be appropriately blended and used.
In consideration of kneadability of rubber material, vulcanization moldability, and adhesion to core bars 2 and 3, other types of rubber such as liquid NBR, ethylene propylene rubber (EPDM), natural rubber (NR) It is also preferable to use it by blending with isoprene rubber (IR), styrene butadiene rubber (SBR), butadiene rubber (BR) or the like.

FIG. 4 is a front view, FIG. 5A is an end view taken along line AA in FIG. 3A, FIG. 5B is an end view taken along line BB in FIG. As shown in the end view of the CC line cutting part in FIG. 3A of FIG. 5C, the first cored bar 11 of the first connecting body 1 extends to the first cylindrical part 11A and the radially outward direction. The second cored bar 12 of the second connecting body 2 is composed of the second cylindrical part 12A and the second flanged part 12B extending outward in the radial direction, and includes the first cored bar 11 and the second cored bar. 12 has a substantially L-shaped cross section cut along a plane including the axial direction and the radial direction.
As described above, since the first cored bar 11 and the second cored bar 12 have a substantially L-shaped cross section cut by a plane including the axial direction and the radial direction, the first cored bar 11 and the second cored bar 12 The radial rigidity is increased.
Therefore, even if the internal fluid pressure or the fluid pressure applied from the outside is higher, the first core metal 11 and the second core metal 12 are not easily deformed in the radial direction.

As shown in the longitudinal sectional side view of FIG. 1 (a), the enlarged vertical sectional side view of the main part of FIG. 1 (b), and the end views of FIG. 5 (a) to FIG. The first cylindrical portion 11A includes a rubber first covering body 4 that covers the first metal core 11 with respect to the inner peripheral surface E of the wall that forms the first through hole A of the first tubular body T1. The first flange portion 11B of the first metal core 11 is attached to the axial end surface F of the first tubular body T1 via the first cover body 4 made of rubber that covers the first metal core 11. Follow.
Thus, since the 1st flange part 11B of the 1st metal core 11 follows the axial direction end surface F of 1st tubular body T1 via the 1st coating | coated body 4, the packing 10 can be positioned to an axial direction.
Further, the second cylindrical portion 12A of the second cored bar 12 is disposed on the outer peripheral surface G of the pipe part D of the second tubular body T2 via the rubber second covering 5 that covers the second cored bar 12. Follow.

A non-circular shape having a major axis and a minor axis, such as the packing 10 shown in the partial longitudinal sectional perspective view of FIG. 2, the front view of FIG. 3A, and the rear view of FIG. It is known that a linear portion substantially parallel to the axis is easily deformed in the radial direction (see, for example, paragraph [0004] of Patent Document 1 and paragraph [0026] of Patent Document 2).
Therefore, as shown in the front view of FIG. 4, the linear portion of the first metal core 11 is radially inward by forming the first cylindrical portion 11 </ b> A of the first metal core 11 in an elliptical shape when viewed in the axial direction. The second cylindrical portion 12A of the second cored bar 12 is formed in a shape viewed from the axial direction, so that the linear portion of the second cored bar 12 is deformed radially outward. It is difficult.

2 is a partial longitudinal sectional perspective view, an end view of FIGS. 5A to 5C, a sectional view taken along line XX in FIG. 3B of FIG. 6A, and FIG. As shown in the YY sectional view in FIG. 3 (b), the portion 4A covering the outer peripheral surface of the first cylindrical portion 11A of the first covering body 4 has peripheral grooves 6 and 7 on the outer peripheral surface. The portion 5A that covers the inner peripheral surface of the second cylindrical portion 12A of the second covering 5 includes a peripheral groove 8 on the inner peripheral surface.
Therefore, the rubber first covering body 4 having the peripheral grooves 6 and 7 on the outer peripheral surface forms the first through hole A of the first tubular body T1 shown in FIGS. 1 (a) and 1 (b). A rubber-made second covering 5 having a higher surface pressure in close contact with the inner peripheral surface E of the wall and having a peripheral groove 8 on the inner peripheral surface is shown in FIGS. 1 (a) and 1 (b). Since the outer surface G of the tube portion D of the second tubular body T2 is in close contact with a higher surface pressure, the sealing action against the pressure fluctuation of the internal fluid or the fluid applied from the outside is stabilized.

Moreover, the part 4B which coat | covers the 1st flange part 11B of the 1st cover 4 is equipped with the lip | stick 9 which protrudes toward the axial direction end surface F of 1st tube T1.
Therefore, the first covering 4 made of rubber covering the first flange portion 11B of the first metal core 11 has an axial end face F of the first tubular body T1 shown in FIGS. 1 (a) and 1 (b). Since the wedge-shaped cross-sectional lip 9 protruding toward the axial end face F of the first tubular body T1 is pressed against the pressure fluctuation of the internal fluid and the fluid applied from the outside, the sealing action is further stabilized.

According to the packing 10 having the above-described configuration, in a state where the first connecting body 1 is fitted to the inner peripheral surface E of the wall forming the first through hole A of the first tubular body T1, the first connecting body 1 The first metal core 11 made of metal is formed on the inner peripheral surface E of the wall forming the first through hole A of the first tubular body T1 through the first rubber cover 4 covering the first metal core 11. The first cover 4 made of rubber is brought into close contact with the inner peripheral surface E.
In addition, in a state where the second connection body 2 is fitted to the outer peripheral surface G of the pipe portion D of the second tube body T2, the metal second metal core 12 of the second connection body 2 covers the second metal core 12. The rubber-made second covering body 5 is brought into close contact with the outer peripheral surface G through pressure contact with the outer peripheral surface G of the tube portion D of the second tubular body T2 through the rubber-made second covering body 5.
Therefore, even when the internal fluid pressure is high or a high fluid pressure is applied from the outside, the sealing performance can be maintained.

In addition, a cross-section cut along a plane including the axial direction and the radial direction, which is integral with the rubber first covering body 4 of the first connecting body 1 and the rubber second covering body 5 of the second connecting body 2. However, the first connector 1 and the second connector 2 are connected by a substantially U-shaped rubber connector 3.
Therefore, when assembling the first tubular body T1 and the second tubular body T2, positions in various directions such as a relative displacement in the radial direction, a relative displacement in the axial direction, and a relative displacement in the tilting direction. The shift can be absorbed by the elastic deformation of the rubber-made connecting body 3 having the above shape.
Furthermore, even when the first tube T1 and the second tube T2 between the electromechanical devices are connected by the packing 10, the radial vibrations and shafts that are always loaded in the operating state of the electromechanical device. The vibrations in various directions such as the vibration in the direction and the vibration in the falling direction can be absorbed by the elastic deformation of the rubber connecting body 3 having the shape.

DESCRIPTION OF SYMBOLS 1 1st connection body 2 2nd connection body 3 Connection body 4 1st coating body 4A Part 4B which coat | covers the 1st cylinder part outer peripheral surface of a 1st coating body Part 5 which coat | covers the 1st flange part of a 1st coating body 2 Cover 5A Parts 6, 7 and 8 for covering the inner peripheral surface of the second cylinder part of the second cover body 9 Circumferential groove 9 Lip 10 Packing 11 First metal core 11A First cylinder part 11B First flange part 12 Second metal core 12A 2nd cylinder part 12B 2nd flange part A 1st through-hole B 2nd through-hole C Connection part D Pipe part E Inner peripheral surface F Axial direction end surface G Outer peripheral surface T1 First tubular body T2 Second tubular body

Claims (4)

A first tubular body having a first non-circular large-diameter first hole having a major axis and a minor axis, and a first non-circular small-diameter having a major axis and a minor axis. A packing connecting a second tubular body having two through holes,
The connecting portion of the first tubular body and the second tubular body is formed by inserting the tubular portion of the second tubular body into the first through hole of the first tubular body,
A first metal core that fits on an inner peripheral surface of a wall that forms the first through hole of the first tubular body, and a first cover body made of rubber that covers the first core metal. Connected body,
A second connector including a metal second cored bar and a rubber second coated body covering the second cored bar, which are fitted to the outer peripheral surface of the pipe part of the second pipe;
A cross section cut along a plane including the axial direction and the radial direction, which is integral with the first covering body and the second covering body, connecting the first connecting body and the second connecting body. A connected body of
A packing characterized by comprising. The first metal core is
A first tube portion that is attached to the inner peripheral surface of the wall forming the first through hole of the first tubular body via the first covering body; and
Including a first flange portion extending radially outward to the axial end surface of the first tubular body via the first covering body;
The cross section cut along the plane including the axial direction and the radial direction is substantially L-shaped,
The second metal core is
A second cylinder part attached via the second covering to the outer peripheral surface of the pipe part of the second pipe, and
Including a second flange portion extending radially outward;
A cross section cut along a plane including the axial direction and the radial direction is substantially L-shaped,
The packing according to claim 1. The portion covering the outer peripheral surface of the first cylindrical portion of the first covering body includes a peripheral groove on the outer peripheral surface,
The portion covering the inner peripheral surface of the second cylindrical portion of the second covering body includes a peripheral groove on the inner peripheral surface.
The packing according to claim 2. The portion of the first covering body that covers the first flange portion includes a lip that protrudes toward the axial end surface of the first tubular body.
The packing according to claim 2 or 3.

Images