WO2012063592A1

WO2012063592A1 - Seal structure for joint section between path forming members

Info

Publication number: WO2012063592A1
Application number: PCT/JP2011/073526
Authority: WO
Inventors: 崇後藤; 有輝藤野
Original assignee: 株式会社ケーヒン
Priority date: 2010-11-09
Filing date: 2011-10-13
Publication date: 2012-05-18
Also published as: CN103201542B; JP5687032B2; JP2012102790A; CN104747721B; CN104747721A; CN103201542A

Abstract

A seal structure for the joint section between path forming members, configured in such a manner that a seal member is disposed between a first path forming member and a second path forming member, the seal member having a seal section mounted in an endless mounting groove provided in the surface of the first path forming member which is joined to the second path forming member. The seal member (12) is configured so as to integrally have: the seal section (12a); ear sections (12b) protruding sideward along a joint surface (10) from the portions of the seal section (12a) which are separated from each other in the peripheral direction; and protrusions (12c) respectively protruding from the ear sections (12b) in the direction opposite the direction toward a second path forming member (6) so as to be perpendicular to the joint surface (10). The joint surface (10) is provided with: recesses (21) adapted to respectively house the ear sections (12b) and connecting to the mounting groove (19); and press-fit holes (22) which each have one end open to the recess (21) and which allow the protrusions (12c) to be press fitted therein. The configuration facilitates the mounting of the seal member, prevents a mounting error, and provides a uniform tightening allowance over the entire periphery of the seal section.

Description

Seal structure of passage forming member coupling part

In the present invention, the first and second passage forming members coupled to each other are respectively provided with passages that communicate with each other in a coupled state, and the first passage forming member has a first surface on the mating surface to the second passage forming member. The first and second passages are provided with attachment grooves that endlessly surround the opening ends of the passages provided in the passage forming member to the mating surface, and have seal portions that are attached to the attachment grooves and are connected in an endless manner. The present invention relates to a seal structure of a passage forming member coupling portion interposed between forming members.

By causing the protrusions projectingly provided at a plurality of locations on the outer peripheral side wall surface of the mounting groove to be resiliently contacted with the outer periphery of the sealing member mounted in the annular mounting groove, the sealing member can Patent Document 1 discloses a structure that is sandwiched between wall surfaces, and the inner peripheral wall surface of the mounting groove is provided with projections that protrude from a plurality of locations on the inner peripheral wall and the outer peripheral wall of the seal member mounted in the mounting groove. Patent Document 2 discloses that a sealing member is held in a mounting groove by elastically contacting the outer peripheral wall surface. Further, Patent Document 3 discloses that a sealing member is held in a mounting groove by press-fitting a convex portion protruding from a sealing member mounted on the mounting groove into a concave portion provided on the bottom surface of the mounting groove. It has been.

Japanese Utility Model Publication Sho 62-35152 Japanese Unexamined Patent Publication No. 2008-31964 Japanese Utility Model Publication No.59-73578

However, as disclosed in Patent Document 1, the protrusions on the outer peripheral side wall of the mounting groove are elastically contacted with the outer periphery of the seal member, and as disclosed in Patent Document 2, the inner peripheral wall and the outer periphery of the seal member. In the case where protrusions projecting from multiple locations on the wall are made to elastically contact the inner and outer peripheral wall surfaces of the mounting groove, there is no space for the seal member to escape in the radial direction at the portion where the protrusions are arranged, and a pair of passages are formed In the coupled state of the members, the tightening allowance of the seal member changes between the portion where the protrusion is disposed and the other portion, and it is difficult to set a uniform allowance in the circumferential direction of the seal member. Moreover, in what was disclosed by the said patent document 3, since the press-fitting position of the convex part to a recessed part cannot be visually observed and it cannot confirm whether it has press-fitted correctly, the assembly | attachment mistake of a sealing member is carried out. It cannot be excluded.

The present invention has been made in view of such circumstances, and facilitates the assembly of the seal member and prevents an assembly error, while ensuring a uniform tightening margin around the seal portion. It is an object of the present invention to provide a seal structure for a passage forming member coupling portion.

In order to achieve the above object, according to the present invention, a first passage forming member and a second passage forming member connected to each other are each provided with a passage communicating with each other in a coupled state, and the second passage forming member of the first passage forming member is provided. A mounting groove is provided on the mating surface to endlessly surround the opening end of the passage provided in the first passage forming member to the mating surface, and the seal has a seal portion that is mounted in the mounting groove and continues endlessly. In the seal structure of the passage forming member coupling portion in which the member is interposed between the first and second passage forming members, the seal member is formed from the seal portion and a plurality of locations spaced in the circumferential direction of the seal portion. Formed integrally with ears protruding laterally along the mating surface and projections projecting from the ears to the opposite side of the second passage forming member in a direction orthogonal to the mating surface The first passage forming portion The mating surface is provided with a recess that is connected to the mounting groove so as to accommodate the ears, and a press-fitting hole that opens one end of the recess so as to press-fit the protrusion. It is characterized by.

According to the present invention, in addition to the configuration of the first feature, the ear portion is formed to be thinner than the thickness of the seal portion in the coupled state of the first and second passage forming members in a direction orthogonal to the mating surface. This is a second feature.

In the present invention, in addition to the configuration of the first or second feature, a notch groove extending along the press-fitting direction into the press-fitting hole having a bottom is formed on the side surface of the protrusion over the entire length of the protrusion. This is a third feature.

Furthermore, in addition to any of the first to third features, the present invention further includes the ear portion projecting outward from the seal portion at two locations spaced in the circumferential direction of the seal portion. The fourth feature is that it is provided.

The throttle body 5 of the embodiment corresponds to the first passage forming member of the present invention, the intake pipe 6 of the embodiment corresponds to the second passage forming member of the present invention, and the first mating surface 10 of the embodiment. Corresponds to the mating surface of the present invention.

According to the first feature of the present invention, the seal member includes an endlessly connected seal portion, a plurality of ear portions protruding laterally from a plurality of locations spaced in the circumferential direction of the seal portion, and their It is formed so as to integrally have a protruding portion protruding from the ear portion, and an endless mounting groove for mounting the seal portion and the ear portion are accommodated on the mating surface of the first passage forming member, respectively. In this way, there is a recess connected to the mounting groove and a press-fitting hole that opens one end of the recess so as to press-fit the protrusion, so that the seal member can be assembled upside down by pressing the protrusion into the press-fitting hole. The seal member is stably held on the first passage forming member with the seal portion mounted in the mounting groove while preventing the erroneous assembly such that the seal portion is mounted at a position shifted in the circumferential direction. Can be sealed during transportation and transportation It can be prevented from coming off the first passage forming member. Moreover, since the press-fitting work of the protrusions into the press-fitting holes can be performed while visually confirming, it is possible to suppress the occurrence of work mistakes. In addition, since the ear portion protrudes laterally from the seal portion, the tightening margin of the seal portion does not change between the portion where the plurality of ear portions are provided and the other portion. A uniform tightening allowance can be set in the circumferential direction.

According to the second feature of the present invention, since the ear portion is formed to be thinner than the thickness of the seal portion in the combined state of the first and second passage forming members, the ear portion is fastened to the seal portion. The margin is not affected, and a uniform margin for the entire circumference of the seal portion can be secured.

According to the third feature of the present invention, the notch groove extending over the entire length of the protrusion along the press-fitting direction into the bottomed press-fitting hole is formed on the side surface of the protrusion. At the time of press-fitting, the closed end of the press-fitting hole and the protruding portion are in a hermetically sealed state to prevent an air lock, thereby improving the assembling property.

Furthermore, according to the fourth feature of the present invention, since the ear portion protrudes outward from two locations spaced in the circumferential direction of the seal portion, the ear portion is assembled with both hands when assembling the seal member. Is possible, and the assembly work becomes easy.

FIG. 1 is a longitudinal sectional view of the throttle body and the intake pipe in a coupled state, and is a sectional view taken along line 1-1 of FIG. (First embodiment) FIG. 2 is a front view of the throttle body as viewed along line 2-2 in FIG. (First embodiment) FIG. 3 is a view of the seal member as seen from the direction of arrows 3-3 in FIG. (First embodiment) FIG. 4 is an enlarged view of a portion indicated by an arrow 4 in FIG. (First embodiment)

5... Throttle body 6 as first passage forming member 6... Intake pipes 7 and 8 as second passage forming member... Passage 10. Member 12a ... Seal part 12b ... Ear part 12c ... Projection 19 ... Mounting groove 21 ... Recess 22 ... Press-fitting hole 26 ... Press-fitting direction 27 ... Notch groove

Hereinafter, embodiments of the present invention will be described with reference to the attached FIGS.

First, in FIG. 1 and FIG. 2, a first passage 7 is provided in the throttle body 5 as a first passage forming member, and a second passage interposed between the throttle body 5 and an engine body (not shown). The intake pipe 6 as a forming member is provided with a second passage 8 that communicates with the first passage 7 by coupling with the throttle body 5.

The throttle body 5 and the intake pipe 6 are integrally provided with

flange portions

5a and 6a connected by a plurality of bolts 9, respectively, and are formed on the

flange portions

5a and 6a so as to face each other. A seal member 12 is interposed between the first and

second mating surfaces

10 and 11.

A throttle valve shaft 13 traversing the first passage 7 is rotatably supported on the throttle body 5, and a butterfly throttle disposed in the first passage 7 is supported on the throttle valve shaft 13. The valve 14 is fastened by, for example, a pair of

screw members

15 and 15.

A throttle drum 16 is fixed to one end portion of the throttle valve shaft 13 protruding from the throttle body 5, and a throttle wire (not shown) is wound around the throttle drum 16 and connected thereto. A return spring 17 for biasing the throttle valve shaft 13 is provided between the throttle drum 16 and the throttle body 5 so as to close the throttle valve 14. Further, a throttle sensor 18 connected to the other end of the throttle valve shaft 13 is attached to the throttle body 5.

An opening to the first mating surface 10 of the first passage 7 is formed in the mating surface of the throttle body 5 to the intake pipe 6, that is, the first mating surface 10 formed in the flange portion 5 a integrated with the throttle body 5. A mounting groove 19 surrounding the end endlessly is provided, and a downstream end of a bypass passage 20 provided in the throttle body 5 bypassing the throttle valve 14 is opened inward from the mounting groove 19.

3 and 4 together, the seal member 12 includes a seal portion 12a mounted in the mounting groove 19 and connected in an endless manner, and a plurality of locations spaced in the circumferential direction of the seal portion 12a, for example,

Ears

12b, 12b projecting laterally along the first mating surface 10 from two places, for example, outward, and the side opposite to the intake pipe 6 from the ears 12b in a direction orthogonal to the first mating surface 10 The

projections

12c and 12c projecting from each other are integrally formed.

On the other hand, the first mating surface 10 of the throttle body 5 press-fits the recesses 21 connected to the mounting groove 19 and the projections 12c so as to accommodate the ears 12b, respectively. The recesses 21 are provided with bottomed press-fitting holes 22 that open at one end.

The seal portion 12a is formed to have a circular cross-sectional shape in a natural state where the seal portion 12a is not sandwiched between the throttle body 5 and the intake pipe 6. The ears 12b ... are disc parts 12ba ... arranged at positions spaced outward from the seal part 12a, and connecting neck parts 12bb connecting the seal part 12a and the disc parts 12ba ... It consists of ... Moreover, the mounting grooves 19 and the recesses 21 are set to have the same depth. When the seal portion 12a is mounted in the mounting groove 19, the disk portions 12ba are formed on the bottom wall of the recesses 21. Abut. In addition, the ear portion 12b is formed thinner than the thickness in the direction perpendicular to the first mating surface 10 of the seal portion 12a when the throttle body 5 and the intake pipe 6 are coupled to each other. In a state where the throttle body 5 and the intake pipe 6 are coupled to each other, a gap 23 is formed between the ears 12b... And the second mating surface 11 as clearly shown in FIG.

The protrusions 12c are projected from the center of the disk portions 12ba in the ears 12b, and an annular recess 25 that forms an annular wall 24 that surrounds the protrusions 12c from the outside. Are provided on the disk portions 12ba so as to surround the protrusions 12c.

Further, a notch groove 27 extending along the press-fitting direction 26 into the press-fitting hole 22 is formed on the side surface of the protrusion 12c over the entire length of the protrusion 12c.

Next, the operation of this embodiment will be described. The seal member 12 interposed between the throttle body 5 and the intake pipe 6 is provided on the first mating face 10 which is a mating face to the intake pipe 6 of the throttle body 5. The seal portion 12a is mounted in an endless mounting groove 19 surrounding the opening end of the first passage 7 to the first mating surface 10 and is connected in an endless manner, and the seal portion 12a is spaced in the circumferential direction. The protrusions 12b projecting laterally along the first mating surface 10 from a plurality of locations, and the protrusions projecting from the ear 12b ... to the opposite side of the intake pipe 6 in the direction orthogonal to the first mating surface 10. Are formed so as to be integrated with each other, and the first mating surface 10 is press-fitted with the recesses 21 connected to the mounting groove 19 so as to accommodate the ears 12b, respectively, and the protrusions 12c. Like before Since the recesses 21 are provided with press-fitting holes 22 for opening one end, the seal member 12 is assembled upside down or displaced in the circumferential direction by press-fitting the protrusions 12c into the press-fitting holes 22 ... The seal member 12 can be stably held in the throttle body 5 in a state where the seal portion 12a is mounted in the mounting groove 19 while preventing erroneous assembly such as being assembled at It is possible to prevent the seal member 12 from dropping from the throttle body 5.

Moreover, since the press-fitting work of the protrusions 12c to the press-fitting holes 22 can be performed while visually confirming, it is possible to suppress the occurrence of work mistakes. Moreover, since the ear | edge part 12b protrudes from the seal | sticker part 12a to the side, the fastening margin of the seal | sticker part 12a will change with the part in which the several ear | edge part 12b ... is provided, and another part. No, it is possible to set a uniform tightening margin in the circumferential direction of the seal portion 12a.

The ears 12b are formed thinner than the thickness in the direction perpendicular to the first mating surface 10 of the seal part 12a when the throttle body 5 and the intake pipe 6 are coupled. Does not affect the tightening allowance of the seal portion 12a, and a uniform allowance for the entire circumference of the seal portion 12a can be ensured.

Further, a notch groove 27 extending along the entire length of the protrusion 12c along the press-fitting direction 26 into the bottomed press-fitting hole 22 is formed on the side surface of the protrusion 12c, so the protrusion 12c. During the press-fitting into the press-fitting holes 22 ..., the closed end of the press-fitting holes 22 and the projections 12c ... are sealed to prevent an air lock and to improve the assembling property. it can.

Further, since the ear portions 12b projecting outward from the seal portion 12a are continuously provided at two locations spaced apart in the circumferential direction of the seal portion 12a, the ear portions 12b can be held with both hands when the seal member 12 is assembled. It is possible to assemble with ..., and the assembling work becomes easy.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the gist of the present invention.

For example, in the above-described embodiment, the first passage forming member is the throttle body 5 and the second passage forming member is the intake pipe 6. Conversely, the first passage forming member is the intake pipe 6, and the second passage forming member is the intake pipe 6. The passage forming member may be the throttle body 5. Further, the present invention is not limited to the seal structure of the joint portion between the throttle body 5 and the intake pipe 6 but is widely used as the seal structure of the joint portion of the first and second passage forming members each having a passage communicating at the time of the joint. Can be applied.

Claims

The first and second passage forming members (5, 6) coupled to each other are respectively provided with passages (7, 8) communicating with each other in a coupled state, and the second passage formation of the first passage forming member (5) is provided. A fitting groove (19) surrounding the opening end to the mating surface (10) of the passage (7) provided in the first passage forming member (5) is formed on the mating surface (10) to the member (6). A passage provided between the first and second passage forming members (5, 6), the seal member (12) having a seal portion (12a) attached to the mounting groove (19) and connected in an endless manner. In the seal structure of the forming member coupling portion, the seal member (12) is formed along the mating surface (10) from the seal portion (12a) and a plurality of locations spaced in the circumferential direction of the seal portion (12a). Ears (12b) projecting sideways and the mating surface (10) The first passage forming member (5) is integrally formed with protrusions (12c) that protrude from the ear portion (12b) to the opposite side of the second passage forming member (6) in the orthogonal direction. The recess (21) connected to the mounting groove (19) so as to accommodate the ears (12b) and the protrusion (12c) so as to accommodate the ears (12b), respectively, on the mating surface (10) (21) A press-fitting hole (22) that opens at one end is provided.
The ear portion (12b) is formed thinner than the thickness in the direction perpendicular to the mating surface (10) of the seal portion (12a) in the coupled state of the first and second passage forming members (5, 6). The seal structure for a passage forming member coupling portion according to claim 1.
A notch groove (27) extending along the press-fitting direction (26) into the press-fitting hole (22) having a bottom is formed on the side surface of the protrusion (12c) over the entire length of the protrusion (12c). The seal structure for a passage forming member coupling portion according to claim 1 or 2.
The ear portion (12b) protruding outward from the seal portion (12a) is continuously provided at two locations spaced apart in the circumferential direction of the seal portion (12a). 4. The seal structure for a passage forming member coupling portion according to any one of 3 above.