JP5974420B2 - Passage forming member with seal member - Google Patents

Description

  According to the present invention, a coupling flange portion surrounding the opening end of the passage is integrally formed at an end portion of the passage forming member forming the passage, and one end of the passage is opened. The present invention relates to a passage forming member with a seal member, in which a mounting groove is provided that endlessly surrounds the opening end of the passage to the mating surface, and a sealing portion of the seal member connected in an endless manner is mounted in the mounting groove.

  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 be attached to the inner periphery of the plurality of protrusions and the mounting groove. 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 No. 62-35152 JP 2008-31964 A 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 the protrusions projecting at a plurality of locations on the wall are elastically contacted with 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 disposed, and the passage forming member In the coupled state with other passage forming members, the tightening margin 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 tightening margin in the circumferential direction of the seal member. is there. 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. An object of the present invention is to provide a passage forming member with a sealing member.

In order to achieve the above object, according to the present invention, a connecting flange portion surrounding the opening end of the passage is integrally formed at an end portion of the passage forming member forming the passage at an end portion where the one end of the passage opens. A mounting groove is provided on the mating surface of the flange portion so as to endlessly surround the opening end of the passage to the mating surface, and a seal portion of the seal member connected in an endless manner is mounted on the mounting groove. In the passage forming member with a member, the seal member includes the seal portion, an ear portion protruding laterally along the mating surface from a plurality of locations spaced in the circumferential direction of the seal portion, and the mating surface. It is formed so as to integrally have a projection having a smaller diameter than the ear, each projecting toward the other end of the passage from the ear in a direction orthogonal to the mating surface of the passage forming member, Each of the ears A recess so as to volume connected to the mounting groove, and a bottomed fitting hole of provided which opens at one end to a bottom wall of the recess so as to press-fit the projection, the outer peripheral portion of the ear portion abut on the periphery of the press-fitting hole of the concave bottom wall in a direction perpendicular to the mating surface, a side surface of the projection is notched groove extending along the press-fitting direction into the fitting hole is projecting portion The first characteristic is that it is formed over the entire length.

  The throttle body 5 of the embodiment corresponds to the passage forming member of the present invention, the first mating surface 10 of the embodiment corresponds to the mating surface of the present invention, and the first passage 7 of the embodiment further corresponds to the main passage surface. Corresponds to the passage of the invention.

The present invention, in addition to the configuration of the first aspect, the sealing member, said at two locations spaced in the circumferential direction of a single of the seal portion, with protruding outward from the sealed portion A second feature is that the ear portion having an annular wall portion surrounding the protrusion from the outside is continuously provided.

  In addition to the configuration of the first or second feature, the third feature of the present invention is that the protrusion is formed in a cylindrical shape along the press-fitting hole.

  Furthermore, the present invention is characterized in that, in addition to any of the configurations of the first to third features, the passage forming member is a throttle body.

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 projecting portion having a smaller diameter than the ear portion, protruding from the ear portion, and an endless shape for mounting the seal portion on the mating surface of the coupling flange portion of the passage forming member An outer periphery of the ear part is provided with a mounting groove, a recess that is connected to the mounting groove so as to accommodate the ear part, and a press-fitting hole that opens one end of the bottom wall of the recess so as to press-fit the protrusion. There Runode to abut the periphery of the press-fitting hole of the concave bottom wall in a direction perpendicular to the mating surface, by press-fitting the protruding portion into the press-fit hole, or sealing member is assembled upside down, in the circumferential direction While preventing incorrect assembly that is assembled at a shifted position A seal portion can be stably held by the sealing member in the passage forming member in a state of being attached to the attachment groove, the sealing member during conveyance or transportation can be prevented from falling out of the 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 portions. A uniform tightening allowance can be set in the circumferential direction. In addition, since a 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, when the press-fitting hole is pressed into the press-fitting hole, It is possible to prevent the air lock from occurring between the closed end and the protruding portion in a sealed state, and to improve the assemblability.

  Further, according to the second feature of the present invention, since the ear portion protrudes outward from two places spaced apart 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.

It is a longitudinal cross-sectional view in the coupling state of a throttle body and an intake pipe, and is a cross-sectional view along line 1-1 in FIG. FIG. 2 is a front view of the throttle body viewed along line 2-2 in FIG. 1. It is the figure which looked at the sealing member from the 3-3 arrow direction of FIG. FIG. 4 is an enlarged view of a portion indicated by an arrow 4 in FIG. 1.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4 attached herewith. First, in FIG. 1 and FIG. 2, the throttle body 5 constituting the passage forming member of the present invention has a passage as a passage. A first passage 7 is provided, and an intake pipe 6 as another passage forming member interposed between the throttle body 5 and an engine main body (not shown) is connected to the throttle body 5 to form a first passage. A second passage 8 leading to the passage 7 is provided.

  At the end of the throttle body 5 where one end of the first passage 7 opens, a coupling flange portion 5a surrounding the opening end of the first passage 7 is provided integrally, while the intake pipe 6 A coupling flange portion 6 a surrounding the open end of the second passage 8 is integrally provided at an end portion where one end of the second passage 8 is opened. The flange portions 5a, 6a are coupled to each other by a plurality of bolts 9 ..., and are formed on the flange portions 5a, 6a, respectively, so that the flat first and second mating surfaces 10, facing each other, A seal member 12 is interposed between 11. Thus, the first mating surface 10 constitutes the mating surface of the present invention, and is formed on the flange portion 5a of the first passage forming member 5 as the passage forming member. It becomes the mating surface to the intake pipe 6 which is.

  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 Are formed so as to integrally have protrusions 12c, 12c having a smaller diameter than the ears 12b.

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. press-bottomed which opens at one end into the recess 21 ... bottom wall of the hole 22 ... and the Ru provided.

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 ... In addition, the mounting grooves 19 and the recesses 21 are set to have the same depth, and when the seal portion 12a is mounted in the mounting groove 19, the outer peripheral portion of the disk portion 12ba is a first mating surface. in the direction perpendicular to the 10 abuts against the peripheral portion of the press-fitting hole 22 ... of the recess 21 ... bottom wall. 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 formed in a cylindrical shape along the press-fitting holes 22 and protrude from the center of the disk portions 12ba in the ears 12b. Annular recesses 25 forming annular wall portions 24 enclosing from the outside are provided in the disk portions 12ba so as to surround the protrusions 12c.

  Further, notches 27 extending along the press-fitting direction 26 into the press-fitting holes 22 are formed on the side surfaces of the protrusions 12c over the entire length of the protrusions 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 ears 12b projecting laterally along the first mating surface 10 from a plurality of locations, and the ears 12b in a direction orthogonal to the first mating surface 10 (that is, the direction along the axis of the first passage 7). Are formed so as to integrally have projections 12c, which are smaller in diameter than the ears 12b, projecting to the opposite side of the intake pipe 6 (that is, the side toward the other end of the first passage 7). . Then, the first mating surface 10 has the ears 12b respectively accommodated in the recesses 21 connected to the mounting groove 19, and the protrusions 12c are press-fitted into the recesses 21 in one end. and press-fitting hole 22 for opening and ... and is provided, the outer peripheral portion of the ear portion 12b ... of the disc portion 12ba ... is the press-fitting hole 22 ... of the recess 21 ... bottom wall in a direction perpendicular to the first mating surface 10 by press-fitting contact to Runode, the protrusions 12c ... in press-fitting hole 22 ... in the peripheral portion, or the sealing member 12 is assembled upside down, wrong assembly occurs or assembled at a position shifted in the circumferential direction The seal member 12 can be stably held on the throttle body 5 with the seal portion 12a mounted in the mounting groove 19 while preventing the seal member 12 from falling off the throttle body 5 during transportation and transportation. You It is possible to prevent the.

  Moreover, since the press-fitting work of the protrusions 12c into 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.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, in the above-described embodiment, the passage forming member of the present invention is described as the throttle body 5, and the other passage forming member is described as the intake pipe 6. Conversely, the passage forming member of the present invention is the intake pipe 6. The other passage forming member may be the throttle body 5. The present invention is widely applied as a passage forming member with a seal member having a passage communicating with not only the throttle body 5 and the intake pipe 6 but also the passage of the other passage forming member when coupled to the other passage forming member. Can do.

5... Throttle body 5 a that is a passage forming member... Flange portion 7 of the throttle body that is a passage forming member... First passage 10 that is a passage. 12 ... Seal member 12a ... Seal part 12b ... Ear part 12c ... Projection 19 ... Mounting groove 21 ... Recess 22 ... Press-fit hole 26 ... Press-fit direction 27 ...・ Notch groove

Claims (4)

A connecting flange portion (5a) surrounding the opening end of the passage (7) is integrally formed at the end of the passage (7) where the end of the passage (7) opens, of the passage forming member (5) forming the passage (7). A mounting groove (19) is provided on the mating surface (10) of the flange portion (5a) to endlessly surround the open end of the passage (7) to the mating surface (10). In the passage forming member with a seal member, wherein the seal portion (12a) of the seal member (12) connected in an endless manner is attached to (19).
The seal member (12) includes the seal portion (12a) and an ear portion protruding laterally along the mating surface (10) from a plurality of locations spaced in the circumferential direction of the seal portion (12a). 12b) and a protrusion having a smaller diameter than the ear portion (12b), which protrudes from the ear portion (12b) toward the other end of the passage (7) in a direction perpendicular to the mating surface (10). (12c) is integrally formed,
The mating surface (10) of the passage forming member (5) is provided with a recess (21) connected to the mounting groove (19) so as to accommodate the ears (12b) and the protrusion (12c). A bottomed press-fitting hole (22) is provided in the bottom wall of the recess (21) so as to be press-fitted, and an outer peripheral part of the ear part (12b) is orthogonal to the mating surface (10). abut on the periphery of the recess in the direction (21) the press-fitting hole of the bottom wall (22) which,
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 projecting part (12c) over the entire length of the projecting part (12c). A passage forming member with a seal member. The seal member (12) protrudes outward from the seal portion (12a) at two locations spaced in the circumferential direction of the single seal portion (12a) and removes the protrusion (12c). The passage forming member with a seal member according to claim 1, wherein the ear portion (12b) having an annular wall portion (24) surrounding from the side is provided continuously .   The passage forming member with a seal member according to claim 1 or 2, wherein the protrusion (12c) is formed in a cylindrical shape along the press-fitting hole (22).   4. The passage forming member with a seal member according to claim 1, wherein the passage forming member (5) is a throttle body.

Images