JP2012077805A - Valve mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve good assembly operability by reducing the number of components while achieving cost reduction.SOLUTION: A shaft insertion through-hole 24 through which a shaft passes is formed in a valve 20. A through-hole 12 in conformity with the shaft insertion through-hole 24 is formed in an intake manifold 10. A central hole 31 in conformity with the through-hole 12, a tube 33 inserted into and supported by the through-hole 12, and a protrusion 34 protruding toward the inside of a flow channel R in a rotational axis direction and engaged with an end in the rotational axis direction of the valve 20 are formed at an axis member 30.

Description

  The present invention relates to a valve mounting structure for adjusting the flow rate of a fluid.

  Conventionally, as this type of valve mounting structure, one used for an intake device of an internal combustion engine is known (see, for example, Patent Documents 1 and 2).

  The thing of patent document 1 is comprised so that the plate-shaped valve for opening and closing the intake passage of an intake manifold may be driven with a shaft. A cylindrical cartridge is loaded in the intake passage of the intake manifold, and a valve is arranged in the cartridge. The valve has a shaft insertion hole through which the shaft is inserted. Further, a through hole is formed in the peripheral wall portion of the cartridge and the peripheral wall portion of the intake manifold in correspondence with the shaft insertion hole of the valve. The valve is attached to the intake manifold in a state where the shaft is inserted into the through hole and the shaft insertion hole of the valve.

  The thing of patent document 2 is also comprised so that the plate-shaped valve for opening and closing the intake passage of an intake manifold may be driven with a shaft. A shaft member constituting a rotating shaft is provided on both sides of the valve, and a bearing member for receiving each shaft member is also provided on each side. Further, the valve is formed with a shaft insertion hole through which the shaft is inserted, and through holes are formed in the shaft member and the bearing member so as to coincide with the shaft insertion hole. In Patent Document 2, the valve is attached to the intake manifold in a state where the shaft is inserted into the through hole of the shaft member and the bearing member and the shaft insertion hole of the valve.

JP 2008-64070 A JP 2006-214299 A

  By the way, when attaching the valve of Patent Document 1 to the intake manifold, the valve is accommodated in the cartridge and the cartridge is accommodated in the intake passage of the intake manifold. Then, when inserting the shaft, the shaft insertion hole of the valve, the through hole of the cartridge, and the through hole of the intake manifold are matched, and then the shaft is inserted into the through hole and the shaft insertion hole. Since the valve is not fixed until the shaft is inserted, the operator must hold the valve. In addition, when the valve is held, the shaft cannot be inserted unless the shaft insertion hole of the valve is matched with the through hole of the cartridge or the through hole of the intake manifold.

  Therefore, as in Patent Document 2, the shaft member and the bearing member are assembled to the valve before being assembled to the intake manifold, and then the valve is assembled to the intake manifold together with the shaft member and the bearing member, so that the valve is interposed via the bearing member. Thus, it is conceivable to improve the assembly workability of the worker by holding it in the intake manifold in advance. However, in Patent Document 2, since a shaft member and a bearing member are necessary, the number of parts increases and the cost increases.

  The present invention has been made in view of such a point, and an object of the present invention is to improve the assembly workability while reducing the number of parts and reducing the cost.

  According to a first aspect of the present invention, there is provided a flow path component that forms a flow path through which a fluid flows, a valve that is disposed in the flow path of the flow path structural member, and that adjusts the flow rate of the fluid flowing through the flow path, and the valve A shaft member for pivotally supporting the flow path component member and a shaft for rotating the valve are provided, and the valve has a shaft insertion hole through which the shaft is inserted. The flow path component is opened to match the shaft insertion hole, and a first through hole through which the shaft is inserted is formed. The shaft member is opened to match the first through hole. A second through-hole through which the shaft is inserted, a cylindrical portion inserted into and supported by the first through-hole, and a rotation axis direction of the valve projecting in the direction of the rotation axis toward the inside of the flow path And a protruding portion that engages with the end of the shaft member. With the portion inserted into the first through hole of the flow path component member, the end of the valve engages with the protruding portion of the shaft member and is supported by the flow path component member via the shaft member. The shaft is inserted into the first through hole, the second through hole, and the shaft insertion hole, and the valve is attached to the flow path component member.

  According to this configuration, the shaft member is supported by the flow path component member by inserting the cylindrical portion of the shaft member into the first through hole of the flow path component member. In this state, the protruding portion of the shaft member protrudes inward of the flow path. Therefore, when the valve is inserted into the flow path, the end of the valve engages with the protruding portion of the shaft member, and thereby the valve is supported by the flow path constituting member via the shaft member.

  When the shaft is inserted into the first through hole, the second through hole, and the shaft insertion hole, the valve and the shaft member are integrated with the flow path component by the shaft.

  Therefore, a bearing member different from the shaft member as in the conventional example is not required, and when the valve is assembled, the valve is supported in advance on the flow path component member via the shaft member before the shaft is inserted. Sometimes, the first through hole, the second through hole, and the shaft insertion hole can be matched. Therefore, it is not necessary for the operator to hold the valve until the shaft is inserted, and the assembly workability is improved.

  In a second aspect based on the first aspect, the protruding portion of the shaft member is provided with a protruding portion that protrudes in the radial direction or a recessed portion that is recessed in the radial direction. A concave portion into which the convex portion of the shaft member fits or a convex portion to fit into the concave portion of the shaft member is provided.

  According to this configuration, the relative movement between the valve and the shaft member is restricted by fitting the convex portion of the shaft member into the concave portion of the valve. Similarly, the relative movement between the valve and the shaft member is also restricted by fitting the convex portion of the valve into the concave portion of the shaft member.

  In a third aspect based on the second aspect, the convex portion of the shaft member is positioned away from the main body portion of the shaft member toward the front end side in the protruding direction of the protruding portion, and the end portion of the valve in the rotational axis direction is It is inserted between the main-body part of a shaft member, and the said convex part, It is characterized by the above-mentioned.

  According to this configuration, the valve and the shaft member do not move relative to each other in the axial direction.

  According to a fourth invention, in the second or third invention, the projection of the shaft member has a claw shape that engages with the valve.

  According to the first invention, the tubular portion of the shaft member is inserted into the first through hole of the flow path component member, the end portion of the valve is engaged with the protruding portion of the shaft member, and the valve flows through the shaft member. Since the shaft is inserted into the first through hole of the flow path component member, the second through hole of the shaft member, and the shaft insertion hole of the valve, the valve is attached to the flow path component member. Assembling workability can be improved while reducing the cost by reducing the number of points.

  According to the second aspect of the present invention, the projecting part of the shaft member is provided with a convex part or a concave part, and the valve is provided with a concave part into which the convex part of the shaft member fits or a convex part to fit into the concave part of the shaft member. The valve can be securely held so that it does not fall when set, and the relative movement of the valve and shaft member in the rotational direction can be restricted, thereby eliminating the rattling of the bearing part and opening and closing the valve. The operation can be performed reliably.

  According to the third aspect of the invention, the valve and the shaft member can be integrated so as not to be separated when the shaft is inserted, and therefore damage due to the axial interference between the valve and the shaft member can be prevented. . Further, fluid leakage from between the valve and the shaft member can be suppressed.

  According to the fourth invention, since the convex portion of the shaft member has a claw shape, it is possible to reliably prevent the valve from being detached from the shaft member. Moreover, since the convex part of the shaft member has a claw shape, it becomes easy for the operator to know whether or not the convex part is engaged with the valve, and the assembly can be performed reliably.

It is a disassembled perspective view of the intake device concerning an embodiment. It is a longitudinal cross-sectional view of the branch pipe of an intake device. It is the perspective view which looked at the valve | bulb from the front side. It is the perspective view which looked at the valve | bulb from the back side. It is a perspective view of a shaft member. It is the end elevation which looked at a shaft member from the projection part side. It is the end view which looked at the shaft member from the cylinder part side. FIG. 4 is a diagram corresponding to FIG. 3 according to Modification 1; FIG. 6 is a diagram corresponding to FIG. 4 according to Modification 1; FIG. 3 is a view corresponding to FIG. 2 according to Modification 1; FIG. 6 is a view corresponding to FIG. 5 according to Modification 2. FIG. 7 is a view corresponding to FIG. 6 according to Modification 2. FIG. 9 is a view corresponding to FIG. 3 according to Modification 2. FIG. 6 is a view corresponding to FIG. 5 according to Modification 3. It is a cross-sectional view of an air intake device according to Modification 4. It is the perspective view which looked at the shaft member concerning the modification 4 from the protrusion part side. It is the perspective view which looked at the shaft member concerning the modification 4 from the cylinder part side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is an exploded perspective view of an intake device 1 for an internal combustion engine to which a valve mounting structure according to an embodiment of the present invention is applied. The intake device 1 includes an intake manifold 10, a valve 20, a shaft member 30, and a shaft 40 (shown in FIG. 2). Two shaft members 30 are provided for one valve 20 as shown in FIG.

  The intake manifold 10 is for supplying intake air to an internal combustion engine (not shown), and is fixed to a cylinder head (not shown) of the internal combustion engine. The intake manifold 10 is made of resin, but may be made of other than resin.

  The internal combustion engine to which the intake manifold 10 is attached is a multi-cylinder engine. Therefore, the intake manifold 10 includes the same number of branch pipes 11 as the number of cylinders of the internal combustion engine. The intake manifold 10 also includes a surge tank (not shown) to which the upstream end of the branch pipe 11 is connected. The intake air in the surge tank is diverted to each branch pipe 11. A flow path R through which intake air flows is formed inside each branch pipe 11. The flow path component of the present invention is the intake manifold 10.

  The valve 20 is provided for each branch pipe 11. The valve 20 is disposed in the flow path R of each branch pipe 11 and is for adjusting the flow rate of the intake air flowing through the flow path R. The shaft member 30 is for supporting the valve 20 on the intake manifold 10 so as to be rotatable. Furthermore, the shaft 40 is for rotating the valve 20.

  First, the structure of the valve 20 will be described. The valve 20 is a so-called butterfly type formed by molding a resin material into a circular plate shape. A rotation axis X of the valve 20 (shown by an imaginary line in FIG. 1) passes through the center of the valve 20 in a plan view.

  As shown in FIG. 3, front side end bulging portions 21, 21 that bulge in the plate thickness direction are formed on both sides of the rotation axis X direction on the surface of the valve 20 (surface on the downstream side in the intake flow direction). Each is formed. In addition, a front-side central bulging portion 22 that bulges in the plate thickness direction is also formed in the central portion of the surface of the valve 20 in the rotation axis X direction. The length of the front side central bulging portion 22 in the rotation axis X direction is set to be longer than the length of the front side end bulging portions 21 and 21 in the same direction.

  As shown in FIG. 4, back side bulging portions 23, 23 bulging in the plate thickness direction are formed on both sides in the rotation axis X direction on the back surface (the upstream surface in the intake flow direction) of the valve 20. ing. The back side bulging parts 23 and 23 are positioned inside both ends of the valve 20 in the rotation axis X direction.

  A shaft insertion hole 24 through which the shaft 40 is inserted is formed in the valve 20 so as to extend linearly along the rotation axis X. The shaft insertion hole 24 passes through the insides of the front-side end bulging portions 21, 21, the front-side central bulging portion 22, and the back-side bulging portions 23, 23, and opens on both sides in the rotational axis X direction of the valve 20. .

  The cross-sectional shape of the shaft insertion hole 24 is a substantially square shape that matches the cross-sectional shape of the shaft 40. Accordingly, the shaft 40 is engaged with the inner surface of the shaft insertion hole 24 in a state where the shaft 40 is inserted into the shaft insertion hole 24, whereby the rotational force of the shaft 40 is transmitted to the valve 20 and the valve 20 is integrated with the shaft 40. Will rotate.

  As shown in FIG. 3, a part of the shaft insertion hole 24 is open to the front side of the valve 20. An open portion on the front side of the shaft insertion hole 24 is a portion between the front side end bulged portions 21 and 21 and the front side central bulged portion 22. As shown in FIG. 4, the other part of the shaft insertion hole 24 is open to the back side of the valve 20. An open part on the back side of the shaft insertion hole 24 is a part between the back side bulging parts 23 and 23 and a part closer to the end in the rotation axis X direction than the back side bulging parts 23 and 23.

  Concave portions 26 are formed on the back surface of the valve 20 on both sides in the rotation axis X direction. The concave portion 26 is located on the outer side in the rotation axis X direction with respect to the back side bulging portion 23 and is opened toward the back side of the valve 20. The recess 26 is formed by recessing the inner peripheral surface of the shaft insertion hole 24 and is continuous with the shaft insertion hole 24. Both side surfaces 26a, 26a of the recessed portion 26 are inclined away from each other as they approach the back surface of the bulb 20, and are inclined so as to follow outer surfaces 34e, 34e of convex portions 34c, 34c of the shaft member 30 described later. Yes. In addition, an opening of the shaft insertion hole 24 is provided at the end of the valve 20 in the rotation axis X direction, and stopper walls 26s and 26s are formed at both side edges of the opening. The stopper wall portions 26 s and 26 s protrude from the both side surfaces 26 a and 26 a of the concave portion 26 in a direction approaching each other, and extend in the front and back direction of the valve 20.

  Next, the structure of the shaft member 30 will be described. The shaft member 30 is an integral body formed by molding a resin material. The resin material constituting the shaft member 30 has a lower sliding resistance than the resin material constituting the intake manifold 10 and the valve 20. Thus, by making the shaft member 30 and the valve 20 separate, the valve 20 is molded from a resin having high heat resistance, durability and impact resistance, while only the shaft member 30 is made of a material having high slidability. The rotational performance of the valve 20 can be improved by molding.

  As shown in FIG. 5, the shaft member 30 has a cylindrical shape as a whole. As shown in FIGS. 6 and 7, the sectional shape of the center hole 31 (second through hole) is the sectional shape of the shaft 40. It is assumed that it is a substantially square that matches. Accordingly, the shaft 40 is engaged with the inner surface of the center hole 31 with the shaft 40 inserted through the center hole 31, whereby the rotational force of the shaft 40 is transmitted to the shaft member 30, and the shaft member 30 is integrated with the shaft 40. Will rotate.

  As shown in FIG. 5, a flange 32 that protrudes radially outward and extends in the circumferential direction is formed near the axial center of the shaft member 30. A notch 32 a is formed in a part of the distal end portion of the flange 32 in the circumferential direction. A cylindrical portion 33 is formed on one side in the axial direction from the flange 32 of the shaft member 30 (the back side in FIG. 5). The outer peripheral surface of the cylinder part 33 is comprised by the cylindrical surface. As will be described later, the cylindrical portion 33 is inserted into the through hole 12 formed in the peripheral wall portion of the branch pipe 11 of the intake manifold 10.

  A protruding portion 34 is formed on the other side in the axial direction than the flange 32 of the shaft member 30 (the front side in FIG. 5). As shown in FIG. 2, the protrusion 34 is formed so as to protrude inward of the flow path R in a state where the shaft member 30 is attached to the intake manifold 10.

  The protruding portion 34 protrudes from an approximately half region in the radial direction on the side surface of the flange 32, and as shown in FIG. 6, the protruding portion 34 is displaced in the radial direction (lower side in FIG. 6) as a whole. Out of the side surfaces of the projecting portion 34, the outer surface is formed by an arc surface 34a. The arc surface 34 a is located on the inner side than the edge of the flange 32.

  Of the side surfaces of the projecting portion 34, a recessed portion 34b is formed on the inner side surface opposite to the arc surface 34a. The recessed portion 34 b is continuous with the center hole 31 and has a shape corresponding to the shape of the shaft 40. The shaft 40 is inserted into the recess 34b.

  On the inner surface of the projecting portion 34, convex portions 34c and 34c are formed on both sides of the recessed portion 34b. The convex portions 34 c and 34 c are separated from the side surface of the flange 32 toward the distal end side of the protruding portion 34. That is, the convex portions 34 c and 34 c are positioned away from the main body portion of the shaft member 30 toward the front end side in the projecting direction of the projecting portion 34. , 34w are formed.

  The opposing inner side surfaces 34d, 34d of the convex portions 34c, 34c extend substantially parallel to each other. The outer surfaces 34e, 34e of the convex portions 34c, 34c extend so as to be closer to each other as they go to the front end side in the protruding direction of the convex portion 34c (upper side in FIG. 6). The convex portion 34 c is adapted to fit into the concave portion 26 of the valve 20. In this fitted state, the outer surfaces 34e, 34e of the convex portions 34c, 34c are along the side walls 26a, 26a of the concave portion 26 of the valve 20, so that the outer surfaces 34e, 34e and the side walls 26a, 26a are in contact with each other. .

  Moreover, the notch 32a of the flange 32 is located in the protruding direction of the convex portions 34c, 34c.

  Next, the structure of the intake manifold 10 will be described based on FIGS. 1 and 2. The branch pipes 11 and 11 of the intake manifold 10 are arranged in the cylinder row direction of the internal combustion engine. A pair of through holes 12 (only one is shown in FIG. 1) penetrating in the cylinder row direction is formed in the peripheral wall portion of each branch pipe 11. The axes of the pair of through-holes 12 are located on the same axis and coincide with the axes of the through-holes of other adjacent branch pipes 11. The through hole 12 is the first through hole of the present invention.

  The cylindrical portion 33 of the shaft member 30 is inserted into the through hole 12. The inner diameter of the through hole 12 is set to be slightly larger than the outer diameter of the cylindrical portion 33 of the shaft member 30, and the shaft member 30 can be rotated around the axis of the through hole 12 with the cylindrical portion 33 inserted. It has become.

  A recess 13 is formed on the inner surface of the peripheral wall portion of each branch pipe 11. The recess 13 extends from the periphery of the through hole 12 to the downstream end of the branch pipe 11. A flange 32 of the shaft member 30 is fitted into the recess 13. The depth of the recess 13 is set to be substantially the same as the thickness of the flange 32.

  Next, the shaft 40 will be described. The shaft 40 is formed by molding a metal material into a square bar shape. The cross-sectional shape of the shaft 40 is substantially square as described above. The length of the shaft 40 is set longer than the dimension in the arrangement direction of the branch pipes 11, 11 of the intake manifold 10, and one shaft 40 passes through the through holes 12 of all the branch pipes 11. ing. An output shaft of an actuator (not shown) is connected to the end of the shaft 40. The shaft 40 is rotated by an actuator.

  Next, an assembling procedure of the intake device 1 for an internal combustion engine configured as described above will be described. First, the shaft member 30 is attached to the intake manifold 10. That is, as shown in FIG. 2, the shaft member 30 is inserted into the branch pipe 11 of the intake manifold 10, and the cylindrical portion 33 of the shaft member 30 is inserted into the through hole 12 of the branch pipe 11. Then, the shaft member 30 is rotated so that the protruding direction of the convex portions 34c, 34c of the shaft member 30 is on the downstream side in the intake air circulation direction (upper side in FIG. 2).

  In this state, the protruding portion 34 of the shaft member 30 is protruded into the flow path R of the branch pipe 11, and the notch 32 a of the flange 32 is located on the downstream side of the branch pipe 11.

  Thereafter, the jig member 100 is used to prevent the shaft member 30 from being inadvertently rotated. The jig 100 is a plate-like member that is inserted from the downstream end opening of the branch pipe 11 into the flow path R, and has a protruding portion that fits into the notch 32a of the flange 32 of the shaft member 30 at the tip. 101 is formed. By fitting the convex portion 101 into the notch 32 a of the flange 32, the rotation of the shaft member 30 is prevented.

  Thereafter, the valve 20 is attached to the intake manifold 10. When attaching the valve 20, the valve 20 is put into the branch pipe 11. At this time, the posture of the valve 20 is set so that the surface faces the downstream side in the intake air circulation direction. When the valve 20 is put into the branch pipe 11 in this state, the projecting portions 34 and 34 of the two shaft members 30 and 30 project toward the flow path R. 34 is caught. Specifically, both ends of the valve 20 in the rotation axis X direction are placed on the protrusions 34 and 34, and the protrusions 34 and 34 engage with the ends of the valve 20 in the rotation axis X direction. In the engaged state, the convex portion 34 a is fitted into the concave portion 26.

  Thus, the valve 20 is supported by the intake manifold 10 via the shaft member 30. At this time, since the convex portion 34c of the shaft member 30 is fitted in the concave portion 26 of the valve 20, the valve 20 and the shaft member 30 are integrated. The relative movement between the valve 20 and the shaft member 30 is restricted.

  Further, stopper wall portions 26 s and 26 s provided at the end of the valve 20 in the rotation axis X direction fit into the groove portions 34 w and 34 w between the convex portion 34 c of the shaft member 30 and the flange 32. Thereby, the valve 20 and the shaft member 30 do not move relative to each other in the axial direction.

  Further, the outer surfaces 34e, 34e of the convex portions 34c, 34c of the shaft member 30 are in contact with and fitted into the side walls 26a, 26a of the concave portion 26 provided at the end portion of the valve 20 in the rotational axis X direction. When the shaft 40 is inserted into the shaft insertion hole 34, the valve 20 and the shaft member 30 move integrally in the rotational direction. Thereby, rattling does not occur between the valve 20 and the shaft member 30, the valve 20 can be rotated more stably, and durability is increased.

  The shaft member 30 and the valve 20 are attached to all the branch pipes 11 as described above.

  Next, the shaft 40 is attached to the intake manifold 10. The shaft 40 is inserted into the through hole 12 of the branch pipe 11 located at the end. The shaft 40 inserted into the through hole 12 of the branch pipe 11 is inserted into the center hole 31 of one shaft member 30 and inserted into the shaft insertion hole 24 of the valve 20, and then the center hole 31 of the other shaft member 30. Inserted into. Thereby, the valve 20 and the shaft member 30 are integrated with the intake manifold 10 by the shaft 40.

  By inserting the shafts 40 into the through holes 12, the shaft members 30, and the valves 20 of all the branch pipes 11, all the valves 20 are rotated together. The output shaft of the actuator is connected to the end of the shaft 40.

  Accordingly, a bearing member different from the shaft member 30 as in the conventional example is not necessary, and when the valve 20 is assembled, the valve 20 is previously connected to the intake manifold 10 via the shaft member 30 before the shaft 40 is inserted. At this time, the through hole 12, the center hole 31, and the shaft insertion hole 24 can be made to coincide with each other. Therefore, it is not necessary for the operator to hold the valve 20 until the shaft 40 is inserted, and the assembly workability is improved.

  As described above, according to this embodiment, the cylindrical portion 33 of the shaft member 30 is inserted into the through hole 12 of the intake manifold 10 and the end portion of the valve 20 is engaged with the protruding portion 34 of the shaft member 30. The valve 20 is supported on the intake manifold 10 via the shaft member 30, and the shaft 40 is inserted into the through hole 12 of the intake manifold 10, the central hole 31 of the shaft member 30, and the shaft insertion hole 24 of the valve 20 to take the valve 20 into the intake 20. Since it is attached to the manifold 10, the assembly workability can be improved while reducing the number of parts and reducing the cost.

  Moreover, since the convex part 34c was provided in the protrusion part 34 of the shaft member 30, and the recessed part 26 in which the convex part 34c of the shaft member 30 fits in the valve | bulb 20, the relative movement of the valve | bulb 20 and the shaft member 30 is controlled. Thus, the valve 20 can be reliably opened and closed.

  Further, by fitting the convex portion 34 c of the shaft member 30 into the concave portion 26 of the valve 20, the valve 20 and the shaft member 30 can be prevented from separating when the shaft 40 is inserted. As a result, fluid leakage from between the valve 20 and the shaft member 30 can be suppressed.

  In the above embodiment, the convex portions 34 c and 34 c are formed on the shaft member 30 and the concave portion 26 is formed on the valve 20. However, the present invention is not limited thereto, and a convex portion is formed on the valve 20 and the valve 20 is formed on the shaft member 30. You may form the recessed part into which the convex part of this fits.

  Moreover, in the said embodiment, although the flange 32 of the shaft member 30 is put in the recessed part 13 formed in the surrounding wall part inner surface of the branch pipe 11, it is not restricted to this, Modification 1 shown in FIGS. As described above, the flange 20 may be inserted into the flange accommodating portions 27 formed at both ends of the valve 20 in the rotation axis X direction. The flange accommodating portion 27 is formed in a concave shape, and the depth thereof is set to be substantially the same as the thickness of the flange 32. In Modification 1, it is not necessary to form a recess for accommodating the flange 32 on the inner surface of the peripheral wall portion of the branch pipe 11.

  Further, as in the second modification shown in FIGS. 11 and 12, the protrusion 34 of the shaft member 30 may be provided with claw-shaped protrusions 34f and 34f. The claw shapes of the convex portions 34f and 34f are provided on the front end side in the protruding direction, and protrude in directions away from each other. Moreover, the base end side of the convex parts 34f and 34f can be elastically deformed. On the other hand, as shown in FIG. 13, the valve 20 of the second modification is formed with an engagement hole 28 with which the claw shape of the convex portion 34 f is engaged. The engagement hole 28 penetrates the front side end bulging portion 21 in the thickness direction. The convex portion 34f engages with the peripheral edge portion of the engagement hole 28 in a state of protruding from the back side of the valve 20 of the engagement hole 28 to the front side.

  In the second modification, the convex portion 34f of the shaft member 30 is engaged with the engagement hole 28 of the valve 20, so that both are reliably integrated, and rattling or the like is less likely to occur. Further, at the time of assembly, when the projection 34f is inserted into the engagement hole 28, the base end side of the projection 34f elastically deforms when the claw shape gets over the peripheral edge of the engagement hole 28, and then the claw shape is engaged. After getting over the peripheral edge of the hole 28, it is restored and engaged with the peripheral edge of the engagement hole 28. Such deformation of the convex portion 34f makes it easy for the operator to know whether or not the convex portion 34f is securely engaged, and can prevent assembling failure and perform reliable assembling.

  Moreover, you may provide the one convex part 34g in the shaft member 30 like the modification 3 shown in FIG. The convex portion 34g is located at the front end of the protruding portion 34 in the protruding direction. Further, the center hole 31 is open to the convex portion 34g. The protrusion 34g has a claw shape. Although not shown, the convex portion 34g is engaged with an engagement hole formed in the valve 20 as in the second modification.

  Moreover, you may make it couple | bond the shaft members 30 and 30 attached to the adjacent branch pipes 11 and 11 like the modification 4 shown in FIG. In this modification 4, the cylinder part 33 of the shaft member 30 is formed long. And as shown in FIG.16 and FIG.17, the notch part 33a is formed in the cylinder part 33. As shown in FIG. The notch 33a is formed by cutting away a half of the cylindrical portion 33 in the radial direction, and the formation range is from the distal end portion of the cylindrical portion 33 to the vicinity of the proximal end side. Therefore, by combining the same shaft members 30 and 30 so that the notch 33a is aligned, both shaft members 30 and 30 are integrated, and one shaft inserted into the through hole 12 is configured. Both shaft members 30, 30 are coupled by inserting the shaft 40 into the center holes 31, 31.

  Moreover, in the said embodiment, although the clearance gap is provided between the convex parts 34c, 34f, 34g of the shaft member 30, and the side surface of the flange 32, not only this but the convex parts 34c, 34f, 34g of the flange 32 are provided. The gap between the convex portions 34 c, 34 f, 34 g and the side surface of the flange 32 may be eliminated by being integrally formed on the side surface.

  Moreover, you may form so that the outer side surfaces 34e and 34e of the convex parts 34c and 34c of the shaft member 30 may extend substantially in parallel.

  Further, the number of the protruding portions 34 of the shaft member 30 may be two or more. The formation position of the protrusion 34 is not limited to the above, and may be in the vicinity of the edge of the flange 32.

  Moreover, the engaging part engaged with the protrusion part 34 of the shaft member 30 may be formed as a protrusion part or a notch part in the both ends of the rotation axis X part vicinity of the valve | bulb 20. FIG.

  In the above-described embodiment, the case where the present invention is applied to the intake device 1 for an internal combustion engine has been described. However, the present invention is not limited to this, and the present invention is not limited to this. The present invention can be applied to a valve mounting structure provided in a member) or a valve mounting structure provided in a flow path constituting member constituting a flow path through which various liquids flow.

  Further, a bearing may be provided between the shaft member 30 and the through hole 12 of the intake manifold 10.

  Further, the shape of the valve 20 is not limited to the above-described shape, and may be, for example, a rectangular plate shape or a valve in which the rotation axis X is shifted from the center of the valve 20. Good.

  As described above, the valve mounting structure according to the present invention can be applied to an intake device for an internal combustion engine, for example.

1 Intake device for internal combustion engine 10 Intake manifold (flow path component)
11 Branch pipe 12 Through hole (first through hole)
20 Valve 24 Shaft insertion hole 26 Recess 30 Shaft member 31 Center hole (second through hole)
32 Flange 33 Tube 34 Projection 34c Projection 40 Shaft R Flow path

Claims (4)

A flow path component constituting a flow path through which the fluid flows;
A valve that is disposed within the flow path of the flow path component and adjusts the flow rate of the fluid flowing through the flow path;
A shaft member for rotatably supporting the valve with respect to the flow path component;
A shaft for rotating the valve,
The valve has a shaft insertion hole through which the shaft is inserted,
The flow path component has a first through hole that opens to match the shaft insertion hole, and through which the shaft is inserted,
The shaft member is opened so as to coincide with the first through hole, the second through hole through which the shaft is inserted, the cylindrical portion that is inserted and supported in the first through hole, and the inside of the flow path A protrusion projecting in the direction of the rotational axis toward the direction and engaging with an end of the valve in the rotational axis direction,
In a state where the cylindrical portion of the shaft member is inserted into the first through hole of the flow path component member, the end portion of the valve is engaged with the protruding portion of the shaft member, and the flow path is interposed via the shaft member. A valve mounting structure characterized in that the valve is mounted to the flow path component member by being supported by a component member and inserting the shaft through the first through hole, the second through hole, and the shaft insertion hole. . In the valve mounting structure according to claim 1,
The protruding part of the shaft member is provided with a protruding part protruding in the radial direction or a recessed part recessed in the radial direction,
A valve mounting structure characterized in that a concave portion into which the convex portion of the shaft member is fitted or a convex portion to be fitted into the concave portion of the shaft member is provided at an end portion in the rotation axis direction of the valve. In the valve mounting structure according to claim 2,
The convex portion of the shaft member is positioned away from the main body portion of the shaft member toward the distal end side in the protruding direction of the protruding portion,
A valve mounting structure, wherein an end of the valve in the rotation axis direction is inserted between a main body portion of the shaft member and the convex portion. In the valve mounting structure according to claim 2 or 3,
The valve mounting structure, wherein the convex portion of the shaft member has a claw shape that engages with the valve.

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