JP2015048922A - Mounting structure of valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a valve device that is easy to be mounted and is hard to slip off.SOLUTION: In a mounting structure of a valve device, a columnar fitting member 11 that includes a tapered glans-shaped part 11a having a diameter enlarged step part 11a1 at its tip part is inserted into a fitting through hole 91a of a vehicle assembly component that is made smaller than the diameter enlarged step part 11a1; the glans-shaped part 11a is protruded from the fitting through hole 91a; and the valve device is mounted to the vehicle assembly component. The columnar fitting member 11 has a slit 11b extending from its tip to an axial direction.

Description

  The present invention relates to a structure for mounting a valve device for opening and closing a fluid flow path to a vehicle assembly part.

  As shown in FIG. 7, the vehicle is equipped with various valve devices including a purge valve (see, for example, Patent Document 1). FIG. 7 is a system configuration diagram of the evaporative fuel processing apparatus, and includes a canister 200 that adsorbs and holds the fuel vaporized in the fuel tank 100. Air can be introduced into the canister 200 through the air release valve 300 and the filter 400. The canister 200 is connected to a negative pressure generating portion of the intake pipe 600 (downstream of the slot valve 700) via a purge valve 500. A pressure sensor 800 is attached between the canister 200 and the fuel tank 100. An air cleaner 900 is connected to the intake pipe 600.

  During the operation of the engine, the evaporated fuel processing apparatus opens the atmospheric valve 300 to introduce air into the canister 200 and opens the purge valve 500 to guide the vaporized fuel held in the canister 200 to the intake pipe 600.

  Since vibrations are intense in the vehicle, particularly around the engine, valves such as the purge valve 500 and the atmospheric valve 300 need to be firmly attached to the vehicle assembly parts. In particular, a large solenoid valve such as the purge valve 500 needs to be firmly attached to a vehicle assembly part.

  Although the purge valve 500 is an electromagnetic valve, when the purge valve 500 is closed, a pressure wave accompanying the closing of the valve is generated in the purge valve 500, the pressure wave is transmitted to the canister 200, and the purge valve 500 is closed from the canister 200. Operation noise (noise) is generated. In order to mitigate the generation of pressure waves when the purge valve 500 is closed, it is necessary to increase the volume, which increases the size (for example, see Patent Document 2).

  As shown in FIGS. 7 to 9, the valve device (purge valve 500) is mounted on a vehicle assembly component (air cleaner 900).

JP 2008-291916 A JP 2001-295960 A

  As shown in FIGS. 7 to 9, the conventional valve device mounting structure has a cylindrical mounting member 503 made of resin having a tapered head portion 503 a having a diameter-increasing stepped portion at the tip and an exhaust pipe of an air cleaner 900. 600 is inserted into the mounting through hole 903a of the resin connecting member 903 and mounted.

After the cylindrical mounting member 503 is moved in the arrow A ₁ direction is inserted into the mounting through-hole 903a, the outer diameter of the enlarged diameter stepped portion so as not to fall out is set larger than the diameter of the mounting through-holes 903a, after installation The enlarged diameter stepped portion is locked to the opening 903b of the attachment through hole 903a of the connecting member 903.

  When the outer diameter of the enlarged diameter step portion is large, it is possible to secure a removal load, but the insertion load into the attachment through hole 903a is increased, and the mounting becomes difficult. On the other hand, if the outer diameter of the enlarged diameter step portion is small, the insertion load becomes small and mounting becomes easy, but there is a problem that the removal load becomes small.

  Recently, vehicle assembly parts have been made thinner in order to reduce fuel consumption and weight. In order to prevent the rigidity from being lowered even if the thickness is reduced, resin materials having high hardness have been used. As the hardness increases, the above problems become more prominent.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a mounting structure for a valve device that is easy to mount and difficult to come off.

  The mounting structure of the valve device of the present invention made to solve the above-described problem is a vehicle assembly part having a cylindrical mounting member having a turtle head that has a diameter-expanded step portion at the tip portion and is tapered, and is smaller than the diameter-expanded step portion. In the mounting structure of the valve device for mounting the valve device to the vehicle assembly part with the glans head being pulled out from the mounting through hole, the cylindrical mounting member is axially oriented from the tip It is characterized by having a slit extending in the direction.

  When the cylindrical mounting member is inserted into the mounting through hole of the vehicle assembly part, the slit is reduced in width so that the cylindrical mounting member is deformed and reduced in diameter. Even if the assembly parts are made of high-hardness resin, the sliding resistance between the outer periphery of the enlarged diameter step and the inner wall of the mounting through hole of the vehicle assembly parts is small (the contact area is small), and the insertion load is not high . Further, when the glans head comes out of the mounting through hole, the diameter reducing force does not work, so the outside diameter of the enlarged stepped portion returns to its original position and locks to the opening of the through hole. As a result, it will not fall out.

  In the mounting structure of the valve device described above, it is preferable that the enlarged diameter step portion has an elliptical cross section. Since the sliding resistance between the outer periphery of the enlarged diameter step portion and the inner wall of the mounting through hole of the vehicle assembly part becomes smaller at the outer periphery in the short axis direction of the enlarged diameter step portion, the insertion load can be further reduced.

  The slit is formed in the cylindrical mounting member so as to be symmetric with respect to the axis, Ls is a distance from the diameter-increasing step portion to the slit bottom portion, and the length of the mounting through hole of the vehicle assembly part is When Lh is set, Ls / Lh is preferably in the range of 0.3 to 0.7.

  The smaller the Ls / Lh, the harder the cylindrical mounting member is deformed (the insertion load is large), and the more difficult it is to drop off. As Ls / Lh is larger, the cylindrical mounting member is more likely to be deformed (insertion load is smaller), and is more likely to fall off. When Ls / Lh is in the range of 0.3 to 0.7, the insertion load is small and it is difficult to fall off. Preferably, Ls / Lh is in the range of 0.4 to 0.6.

  The slit may be a three-way slit or a cross slit. Since the diameter-expanded step portion is radially reduced over the entire circumference, the sliding resistance between the outer periphery of the diameter-expanded step portion and the inner wall of the mounting through-hole of the vehicle assembly component is further reduced.

  When the cylindrical mounting member is inserted into the mounting through hole of the vehicle assembly part, the cylindrical mounting member is deformed and reduced in diameter by the slit, so even if the outer diameter of the enlarged step portion is large, the vehicle assembly part is hard. Even if it is made of a high resin, the insertion load does not increase and a sufficient pull-out load can be secured.

It is a perspective view of the mounting structure of the valve apparatus which concerns on embodiment. It is principal part sectional drawing of FIG. It is A2 arrow line view in FIG. It is A2 arrow line view in FIG. 2 of a deformation | transformation aspect. It is an A2 arrow line view in FIG. 2 of another modification. It is an A2 arrow line view in FIG. 2 of another modification. It is a system block diagram of the conventional evaporative fuel processing apparatus. It is a principal part perspective view of FIG. It is principal part sectional drawing of FIG.

  As shown in FIGS. 1 to 3, the mounting structure of the valve device according to the embodiment includes a columnar mounting member 11 of the purge valve 10 in a mounting through hole 91 a of a connecting member 91 with an exhaust pipe of an air cleaner 90 that is a vehicle assembly part. Is inserted and installed.

Cylindrical attachment member 11 is provided with a glans 11a tapering has a diameter step portion 11a ₁ at the distal end portion is fixed to the base 12 of the joint member. The outer diameter of the enlarged diameter step portion 11a ₁ is set larger than the diameter of the attachment through hole 91a. Further, the length Lh from the base 12 of the cylindrical mounting member 11 to the enlarged diameter step portion 11a ₁ is set equal to the length of the mounting through hole 91a.

  A slit 11b is formed in the columnar mounting member 11 symmetrically with respect to the axis (Z axis), and the slit 11b extends from the tip of the columnar mounting member 11 in the axial direction. The width direction of the slit 11b is a direction along the X axis.

Next, the operation of the mounting structure for the valve device according to the present embodiment will be described. First, the glans 11a of the columnar mounting member 11 is inserted into the mounting through hole 91a of the connecting member 91 from below. Then, since the outer diameter of the enlarged diameter step portion 11a ₁ is larger than the hole diameter of the attachment through hole 91a, a diameter reducing force acts in the radial direction. Then, narrowing the width of the slit 11b are elastically deformed glans 11a in the X-axis direction by a condensed径力, the outer diameter of the enlarged diameter stepped portion 11a ₁ approaches the hole diameter of the mounting hole 91a. Then, the sliding resistance is lowered, and the insertion can be continued with a small insertion load.

When the insertion continues and the glans head 11a (the enlarged stepped portion 11a ₁ ) comes out of the mounting through hole 91a, the diameter reducing force no longer acts, so the width of the slit 11b is restored and the enlarged stepped portion 11a ₁ locking Toba mouth 91a ₁ of the mounting through hole 91a (see FIG. 2.). At the same time, the length Lh of the base portion 12 of the cylindrical mounting member 11 to the enlarged diameter stepped portion 11a ₁ is set equal to the length of the mounting through hole 91a, it slipping out of course, never rattling up and down.

As described above, since the cylindrical mounting member 11 by the slit 11b is reduced in diameter and deformed, even larger outer diameter of the enlarged diameter stepped portion 11a ₁ is, even the connecting member 91 is made of high hardness resins The insertion load does not increase. Further, when the glans 11a (enlarged diameter stepped portion 11a ₁₎ comes out of the mounting through hole 91a, to restore the width of the slit 11b is expanded step portion 11a ₁ is engaged with the Toba mouth 91a ₁ of the mounting holes 91a Therefore, the purge valve 10 does not fall off due to vibration or the like.

Assuming that the distance from the enlarged diameter step portion 11a ₁ to the bottom of the slit 11a is Ls, the smaller the Ls / Lh, the more difficult the cylindrical mounting member 11 is deformed (reduced diameter) (the larger the insertion load), and the more difficult it is to drop out (the removal load). Secure). The larger the Ls / Lh, the easier it is for the cylindrical mounting member 11 to be deformed (reduced diameter) (small insertion load) and fall off. When Ls / Lh is in the range of 0.3 to 0.7, the insertion load is small and it is difficult to come off. Preferably, Ls / Lh is in the range of 0.4 to 0.6.

The slit may be a cross slit 11b ₁ as shown in FIG. 4 or a three-way slit 11b ₂ as shown in FIG. In the case of the slit 11b of the present embodiment shown in FIG. 3, the diameter can be reduced in the X-axis direction but cannot be reduced in the Y-axis direction. For this reason, the sliding resistance between the outer circumference in the Y-axis direction of the enlarged diameter step portion 11a ₁ and the inner wall of the attachment through hole 91a is high. If the cross slit 11b ₁ and the three-way slit 11b ₂ are used, the diameter can be reduced also in the Y-axis direction, so that the enlarged diameter step portion 11a ₁ is reduced in diameter in the radial direction over the entire circumference, and the insertion load is further reduced.

The cross-sectional shape of the enlarged diameter stepped portion 11a ₁ of the glans 11a, as shown in FIG. 6, in the major axis direction X-axis direction, may short axis direction is the Y-axis direction of the elliptical shape. Since the Y-axis direction perpendicular to the width direction (X-axis direction) of the slit 11b where the diameter reducing action by the slit 11b does not work is reduced, the insertion load can be further reduced. Since the minor axis direction is in the Y-axis direction, the outer dimension of the enlarged diameter stepped portion 11a ₁ of the X-axis direction (the width direction of the slit 11b) is unchanged. As a result, the locking force of the Toba mouth 91a ₂ of the mounting hole 91a is not reduced.

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Valve device (purge valve)
11 ················· Cylindrical mounting member 11a ···· Tail head 11a ₁ ··· Increased stepped portion 11b ··· Slit 11b ₁ ··· Cross slit 11b ₂ .... 3-way slit 90 ...... Vehicle assembly parts (air cleaner)
91a ・ ・ ・ ・ ・ ・ ・ ・ Mounting through hole

Claims (4)

A cylindrical mounting member having a tapered turtle head with a diameter-difference stepped portion at the tip is inserted into a mounting through-hole of a vehicle assembly part smaller than the diameter-expanded stepped portion, and the turtle head is pulled out of the mounting through-hole. In the mounting structure of the valve device for mounting the valve device to the vehicle assembly part,
The mounting structure for a valve device, wherein the columnar mounting member has a slit extending in the axial direction from the tip thereof.   The valve device mounting structure according to claim 1, wherein the enlarged diameter step portion has an elliptical cross section.   The slit is formed in the cylindrical mounting member so as to be symmetric with respect to its axis, Ls is the distance from the enlarged diameter step portion to the slit bottom, and Lh is the length of the mounting through hole of the vehicle assembly part. The valve device mounting structure according to claim 1, wherein Ls / Lh is in the range of 0.3 to 0.7.   The valve device mounting structure according to claim 1, wherein the slit is a three-way slit or a cross slit.

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