JPH11223166A - Manifold mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure, which has its flanged manifold mounted on a manifold housing and which is provided with a sealing characteristic of preventing leakage of internal flowing fluid and a vibration control characteristic of properly insulating vibration. SOLUTION: This manifold mounting structure is provided with a fastening member 7, which is inserted movably relatively in the axial direction into a through hole 4 arranged in a flange 3 so as to be fixed in a housing 5, an elastic member 12 arranged between the housing 5 and the flange 3 and between the flange 3 and a head part 10 in the fastening member 7, and a sealing member 15 mounted on a pair of ring type step parts 13, 14 arranged in the opening circumference part of the housing 5 and in the opening circumference part of the flange 3 so as to be opposed to each other in the axial direction. The sealing member 15 is provided with a plurality 17 arranged in the outer circumference side of a supporting member 16, and the packing 17 is brought into tight contact with the circumferential walls 13a, 13b, 14a of the respective ring type step parts 13, 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mounting structure for mounting a manifold to a manifold housing in an internal combustion engine or a power machine such as an automobile engine.

[0002]

2. Description of the Related Art A mounting structure for mounting a manifold to a manifold housing is required to have a sealing property for preventing leakage of an internal flowing fluid and a vibration damping property for appropriately insulating vibration.

On the other hand, in a conventional mounting structure of a type in which a gasket made of a rubber-like elastic material is compressed and sandwiched,
Since the gasket interference and surface pressure must be set large in order to ensure the sealing performance, there is a disadvantage that the vibration-proof effect of the gasket can hardly be obtained (Japanese Utility Model Laid-Open No. 55-108261 or Japanese Utility Model Application 1955-
No. 137250).

There is also a mounting structure of a type in which a bellows-like gasket is inserted instead of a solid gasket.
Since the bellows must be completely crushed in order to secure the sealing property, there is also a disadvantage that the vibration-proof effect can hardly be obtained (see Japanese Utility Model Publication No. 59-43462).

[0005]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a manifold mounting structure having both a sealing property for preventing leakage of an internal flowing fluid and a vibration-proof property for appropriately insulating vibration. The purpose is to:

[0006]

To achieve the above object, a manifold mounting structure of the present invention is a structure for mounting a manifold provided with a flange to a manifold housing, wherein the manifold has a through hole provided in the flange. A fastening member which is inserted to be relatively movable in the axial direction and is fixed to the manifold housing; an elastic member interposed between the manifold housing and the flange and between the flange and a head of the fastening member; An annular seal member mounted on a pair of annular steps provided so as to be axially opposed to each other at the opening peripheral portion of the housing and the opening peripheral portion of the flange, wherein the sealing member is made of a rigid material. A packing made of a rubber-like elastic material is provided on the outer peripheral side of the support member, and the packing is densely attached to the peripheral wall of each of the annular steps. It was to be.

In the manifold mounting structure of the present invention having the above-described structure, even if vibration is input and the manifold and the manifold housing move relative to each other in the axial direction (the direction in which they are joined to each other), the packing of the seal member is maintained in the manifold. In addition, the sealability is sufficiently ensured in order to maintain close contact with the peripheral wall of the annular step portion provided in each of the manifold housings. Further, since the sealing property is sufficiently ensured by the sealing member in this manner, it is possible to reduce the spring of the elastic member, thereby exhibiting a large vibration damping effect. The elastic member to be reduced in spring includes a coil-shaped or dish-shaped spring or a spring, and includes an elastic body made of a rubber-like elastic material.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

First Embodiment As shown in FIG. 1, a manifold 1 having a flange 3 is mounted on a manifold housing 5 by the following mounting structure. The manifold 1 has a tubular portion 2, and an outward flange 3 is integrally provided at the upper and lower ends in the figure.

That is, first, the flange 3 is provided with a required number of through holes 4 penetrating in the thickness direction thereof,
Stepped bolts 7, which are a kind of fastening members, are inserted into the through holes 4 from above and screwed into screw holes 6 provided in the end face 5 a of the manifold housing 5. The stepped bolt 7 has a cylindrical main body 8, a relatively small diameter screw portion 9 is integrally provided at the lower end thereof, and a head 1 having a relatively large diameter flange 11 at the upper end thereof.
0 is provided integrally. The flange 11 may be a type of a separate washer instead. This stepped bolt 7
Is the vertical direction with respect to the through hole 4 (axial direction, joining direction of each other)
Is inserted so that it can move relatively. A coiled spring 12, which is a kind of elastic member, is interposed between the manifold housing 5 and the flange 3 and between the flange 3 and the head 10 of the stepped bolt 7, respectively. The springs 12 are respectively arranged on the outer periphery of the stepped bolt 7.

A pair of annular steps (also referred to as steps) 13 and 14 are provided on the peripheral edge of the opening of the manifold housing 5 and the peripheral edge of the opening of the flange 3 so as to oppose each other in the vertical direction. An annular seal member (also referred to as a seal ring) 15 is press-fitted between the step portions 13 and 14. The sealing member 15 is a ring-shaped supporting member (also referred to as a sleeve) 1 made of a rigid material such as metal.
A packing 17 made of a rubber-like elastic material, which also has an annular shape, is vulcanized and bonded to the outer peripheral surface of the support member 16. The packing 17 has a relatively thick seal portion 18 at each of the upper and lower ends, and the seal portion 18 closely contacts the peripheral walls 13a and 14a of the annular step portions 13 and 14 with a predetermined interference. Also, this sealing member 1
5 and the end walls 13b, 14b of the annular steps 13, 14, respectively, the manifold 1 and the manifold housing 5
A gap 19 having a predetermined size is set so that the and can move relative to each other in the vertical direction when a vibration is input.

The mounting structure of the manifold 1 having the above structure is a structure in which the manifold 1 is floatingly supported by the spring 12, and has the following operation and effects.

First, when vibration is applied to the mounting structure, the manifold 1 and the manifold housing 5 move vertically relative to each other. Of the annular step portions 13 and 14 of the manifold 1 and the manifold housing 5 are kept in close contact with the peripheral walls 13a and 14a, respectively. Accordingly, the sealing performance can be sufficiently ensured, and the fluid (gas or liquid or both) in the manifold 1 or the manifold housing 5 can be effectively prevented from leaking to the outside.

In addition, in order to sufficiently secure the sealing property by the sealing member 15 in this manner, the spring 12 can be separated and independent from the sealing function to reduce the spring. Therefore, a large vibration damping effect can be obtained by the spring 12 having a reduced spring, and the transmission of vibration from the manifold housing 5 to the manifold 1 or vice versa can be effectively blocked.

When an elastic body made of a rubber-like elastic material is used instead of the spring 12 as in the second or third embodiment described later, a vibration damping force is generated by itself, but only the metal spring 12 is used. However, the damping force can be obtained by the deformation of the packing 17 of the seal member 15 and the friction of the press-fitted portion (see the graph of FIG. 2).

Second Embodiment As shown in FIG. 3, a manifold 1 having a flange 3 is mounted on a manifold housing 5 by the following mounting structure. The manifold 1 has a tubular portion 2, and an outward flange 3 is integrally provided at the upper and lower ends in the figure.

That is, first, a required number of through holes 4 are provided in the flange 3 so as to penetrate in the thickness direction thereof,
Stepped bolts 7, which are a kind of fastening members, are inserted into the through holes 4 from above and screwed into screw holes 6 provided in the end face 5 a of the manifold housing 5. The stepped bolt 7 has a columnar main body 8, a relatively small-diameter screw portion 9 is integrally provided at the lower end thereof, and a head 1 with a relatively large-diameter flange 11 is provided at the upper end thereof.
0 is provided integrally. The flange 11 may be a type of a separate washer instead. This stepped bolt 7
Is the vertical direction with respect to the through hole 4 (axial direction, joining direction of each other)
Is inserted so that it can move relatively. An elastic body 20 made of a rubber-like elastic material, which is a kind of elastic member, is interposed between the manifold housing 5 and the flange 3 and between the flange 3 and the head 10 of the stepped bolt 7. The elastic bodies 20 are respectively arranged on the outer periphery of the stepped bolt 7.

A pair of annular steps (also referred to as steps) 13 and 14 are provided on the peripheral edge of the opening of the manifold housing 5 and the peripheral edge of the opening of the flange 3 so as to oppose each other in the vertical direction. An annular seal member (also referred to as a seal ring) 15 is press-fitted between the step portions 13 and 14. The sealing member 15 is a ring-shaped supporting member (also referred to as a sleeve) 1 made of a rigid material such as metal.
A packing 17 made of a rubber-like elastic material, which also has an annular shape, is vulcanized and bonded to the outer peripheral surface of the support member 16. The packing 17 has a relatively thick seal portion 18 at each of the upper and lower ends, and the seal portion 18 closely contacts the peripheral walls 13a and 14a of the annular step portions 13 and 14 with a predetermined interference. Also, this sealing member 1
5 and the end walls 13b, 14b of the annular steps 13, 14, respectively, the manifold 1 and the manifold housing 5
A gap 19 having a predetermined size is set so that the and can move relative to each other in the vertical direction when a vibration is input.

The mounting structure of the manifold 1 having the above-described structure is a structure in which the manifold 1 is floatingly supported by the elastic body 20, and has the following effects.

That is, when vibration is applied to the mounting structure, the manifold 1 and the manifold housing 5 move up and down relative to each other. Of the annular step portions 13 and 14 of the manifold 1 and the manifold housing 5 are kept in close contact with the peripheral walls 13a and 14a, respectively. Accordingly, the sealing performance can be sufficiently ensured, and the fluid (gas or liquid or both) in the manifold 1 or the manifold housing 5 can be effectively prevented from leaking to the outside.

Further, since the sealing property is sufficiently ensured by the sealing member 15 in this manner, the elastic body 20 can be separated and independent from the sealing function to reduce the number of springs. Therefore, the elastic body 2 having a reduced spring
With 0, a large vibration-proof effect can be obtained, and the transmission of vibration from the manifold housing 5 to the manifold 1 or vice versa can be effectively blocked.

Third Embodiment As shown in FIG. 4, a manifold 1 having a flange 3 is mounted on a manifold housing 5 by the following mounting structure. The manifold 1 has a tubular portion 2, and an outward flange 3 is integrally provided at the upper and lower ends in the figure.

That is, first, the flange 3 is provided with a required number of through holes 4 penetrating in the thickness direction thereof.
Each of the through holes 4 has a collar 24 which is a kind of a fastening member.
An attached bolt 21 is inserted from above and screwed into a screw hole 6 provided in the end face 5 a of the manifold housing 5. The bolt 21 has a relatively small-diameter screw portion 22, and a relatively large-diameter head 23 is integrally provided at the upper end thereof. The collar 24 is formed in an annular shape by a rigid material such as metal, and an outward flange 26 is integrally provided at an upper end of a cylindrical portion 25 interposed between the manifold housing 5 and the head 23 of the bolt 21. Has been
The flange 26 is engaged with the head 23 of the bolt 21. The bolt 21 with the collar 24 is inserted into the through hole 4 so as to be relatively movable in the vertical direction (axial direction, joining direction of each other). An annular elastic body (also referred to as a grommet) 27 made of a rubber-like elastic material is vulcanized and bonded to the outer peripheral surface of the cylindrical portion 25 of the collar 24 and the lower surface of the flange portion 26. Is engaged with the peripheral edge of the through hole 4 with an annular engaging groove 28 formed in the hole. The elastic body 27 is located between the manifold housing 5 and the flange 3 and between the flange 3 and the head 1 of the stepped bolt 7.
0 (all in the axial direction), and between the inner wall of the through hole 4 and the cylindrical portion 25 of the collar 24 (in the radial direction).

A pair of annular steps (also referred to as steps) 13 and 14 are provided on the peripheral edge of the opening of the manifold housing 5 and the peripheral edge of the opening of the flange 3 so as to oppose each other in the vertical direction. An annular seal member (also referred to as a seal ring) 15 is press-fitted between the step portions 13 and 14. The sealing member 15 is a ring-shaped supporting member (also referred to as a sleeve) 1 made of a rigid material such as metal.
A packing 17 made of a rubber-like elastic material, which also has an annular shape, is vulcanized and bonded to the outer peripheral surface of the support member 16. The packing 17 has a relatively thick seal portion 18 at each of the upper and lower ends, and the seal portion 18 closely contacts the peripheral walls 13a and 14a of the annular step portions 13 and 14 with a predetermined interference. Also, this sealing member 1
5 and the end walls 13b, 14b of the annular steps 13, 14, respectively, the manifold 1 and the manifold housing 5
A gap 19 having a predetermined size is set so that the and can move relative to each other in the vertical direction when a vibration is input.

The mounting structure of the manifold 1 having the above-described structure is a structure in which the manifold 1 is floatingly supported by the elastic body 28, and has the following effects.

First, when vibration is applied to the mounting structure, the manifold 1 and the manifold housing 5 move vertically relative to each other. Of the annular step portions 13 and 14 of the manifold 1 and the manifold housing 5 are kept in close contact with the peripheral walls 13a and 14a, respectively. Accordingly, the sealing performance can be sufficiently ensured, and the fluid (gas or liquid or both) in the manifold 1 or the manifold housing 5 can be effectively prevented from leaking to the outside.

In addition, since the sealing property is sufficiently ensured by the sealing member 15 in this manner, the elastic body 28 can be separated and independent from the sealing function to reduce the number of springs. Therefore, the elastic body 2 having a reduced spring
8, a great vibration damping effect can be obtained, and the transmission of vibration from the manifold housing 5 to the manifold 1 or vice versa can be effectively blocked.

[0028]

The present invention has the following effects.

That is, in the manifold mounting structure of the present invention having the above-described structure, even if vibration is first input and the manifold and the manifold housing move relative to each other in the axial direction, the packing of the seal member is applied to the manifold and the manifold housing. It keeps close contact with the peripheral wall of each provided annular step. Therefore, the sealing property can be sufficiently ensured, and the fluid in the manifold or the manifold housing can be effectively prevented from leaking to the outside.

In addition, since the sealing property is sufficiently ensured by the sealing member in this manner, the elastic member can be separated and independent from the sealing function to reduce the number of springs. Therefore, a large vibration damping effect can be obtained by the elastic member having a reduced spring, and transmission of vibration from the manifold housing to the manifold or vice versa can be effectively blocked.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a manifold mounting structure according to a first embodiment of the present invention.

FIG. 2 is a graph showing a vibration damping characteristic.

FIG. 3 is a sectional view of a main part of a manifold mounting structure according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a manifold mounting structure according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manifold 2 Cylindrical part 3 Flange 4 Through-hole 5 Manifold housing 5a End surface 6 Screw hole 7 Stepped bolt (fastening member) 8 Main body 9,22 Screw part 10,23 Head 11 Flange 12 Spring (elastic member) 13,14 Annular steps 13a, 14a Peripheral wall 13b, 14b End wall 15 Sealing member 16 Supporting member 17 Packing 18 Sealing portion 19 Gap 20, 27 Elastic body (elastic member) 21 Bolt (fastening member) 24 Collar 25 Cylindrical portion 26 Flange portion 28 Groove

Claims (1)

[Claims] 1. A structure for mounting a manifold (1) having a flange (3) to a manifold housing (5), wherein the manifold (1) is relatively moved in an axial direction with respect to a through hole (4) provided in the flange (3). A fastening member (7) (21) inserted as possible and fixed to the manifold housing (5), between the manifold housing (5) and the flange (3) and between the flange (3) and the fastening member (7). The elastic member (1) interposed between the heads (10) and (23) of (21)
2) (20) and (27) and a pair of annular steps (13) and (13) provided on the peripheral edge of the opening of the manifold housing (5) and the peripheral edge of the opening of the flange (3) so as to face each other in the axial direction. An annular seal member (15) mounted on the support member (14), wherein the seal member (15) is made of a rigid support member (16).
And a packing (17) made of a rubber-like elastic material is provided on the outer peripheral side of the annular stepped portion (13) (14). A manifold mounting structure characterized by the following.