JP2006329121A - Valve mounting structure, mounting method, and valve for resin-made inlet manifold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the weight of a valve provided in a resin-made inlet manifold and simplify its mounting structure. <P>SOLUTION: One valve body 18a and a shaft 18b are integrally molded by resin. Connection means 18c, 18d are provided in an end part of the shaft, and end parts of a plurality of shafts 18b are mutually connected by these connection means 18c, 18d to constitute a continuously mounted valve 16. Weight of a body part 14 itself is reduced using the resin-made body part 14. The shafts 18b of the four continuously mounted valves 16 are mounted in a bearing part 12a of a port 12 formed in the resin-made inlet manifold, the resin-made body part 14 is fitted into the port 12, and a polymerized part of the port 12 and the resin-made body part 14 is welded. Consequently, the port 12 and the resin-made body part 14 are fixed while ensuring sealing property of both of them to mount the continuously mounted valves 16 on the resin-made inlet manifold securely. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a resin inlet manifold valve and its mounting technology.

  In recent years, an intake manifold formed of resin (hereinafter also referred to as “resin intake manifold”) has been widely used to promote weight reduction of engines. As shown in FIG. 8, the resin intake manifold 10 is also provided with a variable valve for providing an intake pipe length corresponding to the operating state of the engine by providing a port 12 that is opened and closed by a valve at an intermediate portion thereof. Those are widely put into practical use (for example, see Patent Document 1).

JP 2002-317718 A ([Claim 4], [0002], [FIG. 2])

By the way, the valve body portion (see reference numeral 14 in FIG. 1) attached to the port 12 of the resin intake manifold 10 is generally made of aluminum, and the resin intake manifold 10 is fixed to the resin intake manifold 10 by resin. This is done by tightening a bolt against a nut press-fitted into the intake manifold 10 in advance. Moreover, in order to ensure the sealing between the resin intake manifold 10 and the body part, it is indispensable to interpose a gasket between them. Such a mounting structure of the body portion with respect to the resin intake manifold 10 hinders the light weight effect due to the intake manifold made of resin.
Further, the valve mounted on the port 12 of the resin intake manifold 10 also needs to ensure the shaft component accuracy in order to smoothly open and close, so that the metal shaft is made of metal or resin. A structure for fixing the valve body is generally adopted. Therefore, it is necessary to fix the shaft and the valve body with a small screw or the like, which increases the number of parts, the number of assembly steps, the part cost, and the weight.

  The present invention has been made in view of the above problems, and the object of the present invention is to reduce the weight of the valve installed in the resin intake manifold and simplify the mounting structure, and to facilitate the mounting operation of the valve. There is to do.

In order to solve the above problems, the valve mounting structure of the resin inlet manifold according to the present invention is such that one valve body and a shaft are integrally molded with resin, and connecting means are provided at both ends of the shaft, The ends of the plurality of shafts are connected to each other by the connecting means to form a connecting valve, and the shaft of the connecting valve is attached to a bearing portion of a port formed in the resin inlet manifold, and the resin body portion is attached to the port. Is inserted, and the overlapped portion of the port and the resin body portion is welded.
According to the present invention, simplification and weight reduction of the valve structure are promoted by integrally molding one valve body and the shaft. In addition, since connecting means are provided at both ends of the shaft, and the connecting valve is constituted by connecting the ends of the plurality of shafts by the connecting means, the length of the shaft formed integrally with one valve is formed. The length itself is shortened, and the resin shaft is less likely to warp. Even if the shaft is warped, the connecting valve absorbs the warp while the shaft of the connecting valve is mounted on the bearing of the port, and the smoothness of the opening and closing operation of the connecting valve is ensured. Is possible.
Moreover, the weight reduction of the body part itself is achieved by using the resin body part. The shaft of the continuous valve is attached to the bearing portion of the port formed in the resin inlet manifold, the resin body portion is fitted into the port, and the overlapping portion of the port and the resin body portion is welded. It is possible to securely attach the connecting valve to the resin inlet manifold while securing the sealability between the port and the resin body portion.

In addition, as said connection means, it is desirable that the snap fit is formed in the both ends of a shaft.
In this way, the connecting means provided at both ends of the shaft is snap fit, so that the operation of connecting the ends of the plurality of shafts to form the connecting valve can be reliably performed only by hand. It becomes possible. Further, if the engagement state between the snap fits is slightly loosened, it becomes possible to absorb the warp of the shaft at the connecting portion between the snap fits.

In addition, the valve mounting structure of the resin inlet manifold according to the present invention for solving the above-mentioned problem is that one valve body and a shaft are integrally molded with resin, and the shaft is formed on the resin inlet manifold. It is mounted on a bearing portion of a port, a resin body portion is fitted into the port, and a superposed portion of the port and the resin body portion is welded.
According to the present invention, simplification and weight reduction of the valve structure are promoted by integrally molding one valve body and the shaft. Moreover, the weight reduction of the body part itself is achieved by using the resin body part. And the shaft is attached to the bearing portion of the port formed in the resin inlet manifold, the resin body portion is fitted into the port, and the overlapping portion of the port and the resin body portion is welded, It is possible to securely attach the continuous valve to the resin inlet manifold while securing the sealing property with the resin body portion.

Further, in order to solve the above problems, the valve mounting method of the resin inlet manifold according to the present invention is to integrally mold one valve body and the shaft, and provide connecting means at both ends of the shaft, A plurality of shaft ends are connected to each other by a connecting means to form a connected valve, and the shaft of the connected valve is attached to a bearing portion of a port formed in a resin inlet manifold, and a resin body portion is attached to the port. And the overlapped portion of the port and the resin body part is welded.
According to the present invention, simplification and weight reduction of the valve structure are promoted by integrally molding one valve main body and the shaft. Also, by providing connecting means at both ends of the shaft and connecting the ends of a plurality of shafts by the connecting means to form a connecting valve, the length of the shaft itself molded integrally with one valve is It becomes shorter and the resin shaft is less likely to warp. Even when the shaft is warped, the connecting valve absorbs the warp while the shaft of the connecting valve is mounted on the bearing of the port, and the smoothness of the opening and closing operation of the connecting valve is ensured. Is possible.
Further, by using the resin body part, the weight of the body part itself can be reduced. Then, the shaft of the continuous valve is attached to the bearing portion of the port formed in the resin inlet manifold, the resin body portion is fitted into the port, and the overlapping portion of the port and the resin body portion is welded, It is possible to secure the seal between the resin body part and the resin body part, and to fix both of them and to securely attach the valve to the resin inlet manifold.

In addition, as said connection means, it is desirable to form a snap fit at the shaft end.
In this way, by forming a snap fit as a connecting means provided at the end of the shaft, it is possible to reliably perform the operation of connecting the ends of the plurality of shafts to form the connecting valve only by manual work. It becomes possible. Further, if the engagement state between the snap fits is slightly loosened, it becomes possible to absorb the warp of the shaft at the connecting portion between the snap fits.

The valve mounting method of the resin inlet manifold according to the present invention for solving the above problems is a port in which one valve body and a shaft are integrally molded with a resin, and the shaft is formed on the resin inlet manifold. The resin body portion is fitted into the port, and the overlapping portion of the port and the resin body portion is welded.
According to the present invention, simplification and weight reduction of the valve structure are promoted by integrally molding one valve main body and the shaft. Further, by using the resin body part, the weight of the body part itself can be reduced. Then, the shaft is attached to the bearing portion of the port formed in the resin inlet manifold, the resin body portion is fitted into the port, and the port and the polymer body portion of the resin body portion are welded, whereby the port and the resin are welded. Both of them can be fixed and the valve can be securely attached to the resin inlet manifold while securing the hermetic seal with the body part.

In addition, a valve according to the present invention for solving the above problems is a valve that is mounted on a bearing portion of a port formed in a resin inlet manifold, and one valve body and a shaft portion are integrally formed of resin. In addition, a snap fit having complementary irregularities is formed at both ends of the shaft.
According to the present invention, simplification and weight reduction of the valve structure are promoted by integrally molding one valve body and the shaft portion with resin. In addition, a snap fit having complementary concave and convex shapes is provided at both end portions of the shaft, and the end portions of a plurality of shafts are connected to each other by the snap fit so that a continuous valve is formed. The length of the molded shaft itself is shortened, and it is difficult for the resin shaft to warp. Further, even when the shaft is warped, it is possible to absorb the warp at the connecting portion between the shafts by snap fit, and to ensure the smoothness of the opening / closing operation of the connecting valve. In addition, the operation of connecting the end portions of the plurality of shafts to form the continuous valve can be reliably performed only by manual operation.

Moreover, it is desirable that the snap fit has an uneven shape that allows a change in the connection angle between the shafts while maintaining the connection state between the shafts.
According to the present invention, even when the shaft is warped, the snap fit is provided with a concavo-convex shape that allows a change in the connection angle between the shafts while maintaining the connection state between the shafts. It is possible to absorb the warp at the connecting portion of the shafts due to the fit, and to ensure the smoothness of the opening / closing operation of the continuous valve.

  Since this invention was comprised in this way, the weight reduction of the valve | bulb installed in a resin inlet manifold and simplification of a structure can be achieved, and also the attachment operation | work of a valve | bulb can be made easy.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the same or corresponding parts as those in the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 1 shows components of a valve mounting structure for a resin intake manifold according to the first embodiment of the present invention. The body portion 14 is formed using the same material (6 nylon or the like) as the port 12 formed integrally with the resin intake manifold 10 (see FIG. 8). On the other hand, the four-unit valve 16 is configured by connecting four single-unit valves 18.
As shown in FIGS. 4 to 6, each single valve 18 is formed by integrally molding a single valve body 18 a and a shaft 18 b with the same material as the port 12 and the body portion 14, or more than them. It is made of a material whose dimensional accuracy is easily guaranteed, such as PPS (polyphenylene sulfide resin). Further, snap fittings 18c and 18d having complementary concave and convex shapes as a connecting means are integrally formed at the end of the shaft 18b. Here, reference numeral 18c is a convex snap fit, and reference numeral 18d is a concave snap fit.

  Then, the convex snap fit 18c is formed in the central portion of the shaft 18b from the base portion 20 extending in the shape of a quadrangular prism in the axial direction, and from the side surface of the base portion 20 to the direction perpendicular to the axial direction of the shaft 18b. It is comprised with the lock | rock part 22 (The example of a dimension is shown in FIG. 7) which has the shape which combined the cylinder and the prism which protrude. The concave snap fit 18d has a hollow shape complementary to the base portion 20 and the lock portion 22 of the convex snap fit 18c. The convex snap fit 18c and the concave snap fit 18d are dimensioned so that a slight gap is generated so as to allow a change in the coupling angle of each other while maintaining the coupling state.

Further, as shown in FIG. 1, the resin intake manifold port 12 is configured such that a part of the wall of the port 12 is cut into an arc shape in order to receive the shaft 18 b of the four-connected valve 16. A bearing portion 12a is formed. As shown in FIG. 2, the shaft 18 b of the four-way valve 16 is attached to the bearing portion 12 a of the port 12. At this time, the snap fits 18c and 18d located at both ends of the four-way valve 16 are left as they are unless interference with other parts becomes a problem.
Furthermore, as shown in FIG. 3, the body portion 14 is fitted into each port 12 to which the four-way valve 16 is attached. Then, the overlapping portions of the port 12 and the body portion 14 are welded by an appropriate technique such as laser welding. At this time, since the port 12 and the body portion 14 are formed of the same material, they are reliably welded, and the sealing property between the port 12 and the body portion 14 is sufficiently ensured.

  According to the embodiment of the present invention configured as described above, the following operational effects can be obtained. First, according to the embodiment of the present invention, a single valve body 18a and a shaft 18b are integrally molded with a resin, thereby fixing a conventional valve body made of metal or resin to a metal shaft. Compared with the valve structure, simplification and weight reduction of the valve structure are promoted. Further, connecting means 18c and 18d are provided at the shaft end, and the connecting valves 18c and 18d connect the ends of the plurality of shafts 18b to form the connecting valve 16, thereby integrating with one valve 18a. The length of the shaft 18b itself formed becomes shorter, and the warpage of the shaft as a whole of the four-way valve 16 is less likely to occur. Even when the shaft 18b is warped, the warp is absorbed by the connecting portion of the shafts 18b by the connecting means 18c and 18d, and the smoothness of the opening / closing operation of the connecting valve 16 can be ensured. .

In addition, the use of the resin body 14 reduces the weight of the body 14 itself. Then, the shaft 18b of the four-way valve 16 is attached to the bearing portion 12a of the port 12 formed in the resin intake manifold 10, the resin body portion 14 is fitted into the port 12, and the port 12 and the resin body portion 14 are inserted. By welding the superposed portions, it is possible to securely attach the connecting valve 16 to the resin intake manifold 10 while securing the sealing between the port 12 and the resin body portion 14 while securing them. Further, unlike the conventional case, it is not necessary to fix the body portion by tightening the bolt against the nut press-fitted into the resin intake manifold 10 in advance, so that it is not necessary to provide a bolt tightening flange on the resin intake manifold 10. Accordingly, the degree of freedom in designing the resin intake manifold 10 itself is increased, which contributes to the improvement in performance of the resin intake manifold 10.
In addition, when laser-welding the superposed portion of the port 12 and the resin body portion 14, the resin material of the body portion 14 contains a pigment that enhances the laser beam permeability, so that the port 12 and the resin body portion can be contained. The welding efficiency with 14 can be improved.

  Moreover, in embodiment of this invention, the connection means provided in the shaft edge part is snap fit 18c, 18d, Therefore The operation | work which comprises the connecting valve 16 by connecting the edge parts of the some shaft 18b is carried out. It is possible to carry out reliably only by manual work. In addition, by slightly loosening the engagement state between the snap fits 18c and 18d, the snap fits 18c and 18d have a concavo-convex shape that allows a change in the connection angle between the shafts 18b while maintaining the connection state between the shafts 18b. . Therefore, it is possible to absorb the warp of the shaft 18b in a state where it is mounted on the bearing portion 12a of the port 12.

  The snap fits 18c and 18d are dimensioned so that a gap is generated so as to allow the shafts 12b to be connected to each other and maintain the connected state while allowing a change in the connection angle between them. Any shape can be used as long as it can absorb the warp of the shaft 18b, and the shape is not limited thereto. Further, instead of the snap fit, for example, by connecting each single valve 18 using a ball joint, smoothness of opening and closing of the valve is ensured.

The number of connected single valves 18 can be adjusted according to the type of engine, the number of cylinders, and the like. Further, the single valve 18 according to the embodiment of the present invention and the continuous valve 16 constituted by the single valve 18 are limited to application to a variable valve for giving an intake pipe length according to the operating state of the engine. It is possible to use it for all the valves of the resin intake manifold 10 instead.
It is also possible to use only one single valve 18 without connecting a plurality. Also in this case, the snap fits 18c and 18d positioned at both ends of the single valve 18 can be left as they are and mounted on the resin intake manifold 10 as long as interference with other parts does not matter.

It is an exploded view of the valve mounting structure of the resin intake manifold according to the embodiment of the present invention. It is an exploded view which shows the state which mounted | wore the bearing part of the port with the shaft of the four linked valves shown in FIG. It is a perspective view which shows the state which complete | finished mounting | wearing of the valve attachment structure of the resin intake manifold which concerns on embodiment of this invention. It is a perspective view of the single-equipped valve which comprises the valve attachment structure of the resin intake manifold which concerns on embodiment of this invention. It is the perspective view which looked at the single valve | bulb shown in FIG. 4 from the different angle. FIG. 5 is a side view of the single valve shown in FIG. 4. It is a top view which shows the example of a specific shape of the snap fit formed in the shaft edge part of the single valve | bulb shown in FIG. It is a perspective view which shows the state which cut | disconnected a part of resin intake manifold and exposed the port.

Explanation of symbols

10: Resin intake manifold, 12: Port, 14: Body part, 16: Four-unit valve, 18: Single valve, 18a: Valve body, 18b: Shaft, 18c, 18d: Snap fit, 20: Base part, 22: Lock part

Claims (8)

One valve main body and the shaft are integrally molded with resin, and connecting means are provided at both ends of the shaft, and the connecting means connects the ends of a plurality of shafts to form a connecting valve. The valve shaft is mounted on the bearing portion of the port formed in the resin inlet manifold, the resin body portion is fitted into the port, and the overlapping portion of the port and the resin body portion is welded. The valve mounting structure of the resin inlet manifold characterized by 2. The valve mounting structure for a resin inlet manifold according to claim 1, wherein a snap fit is formed at both ends of the shaft as the connecting means. One valve body and a shaft are integrally molded with resin, the shaft is attached to a bearing portion of a port formed in a resin inlet manifold, and a resin body portion is fitted into the port. A valve mounting structure for a resin inlet manifold, wherein a polymerized portion of a resin body portion is welded. One valve body and the shaft are integrally molded with resin, and connecting means are provided at both ends of the shaft, and the connecting parts are connected to each other by connecting the ends of the plurality of shafts. A resin characterized in that a shaft is mounted on a bearing portion of a port formed in a resin inlet manifold, a resin body portion is fitted into the port, and a superposed portion of the port and the resin body portion is welded. Valve installation method for the inlet manifold. 6. The valve mounting method for a resin inlet manifold according to claim 5, wherein a snap fit is formed at both ends of the shaft as the connecting means. One valve body and a shaft are integrally molded with resin, the shaft is attached to a bearing portion of a port formed in a resin inlet manifold, a resin body portion is fitted into the port, and the port and the resin A valve mounting method for a resin inlet manifold, wherein a superposed portion of a body portion is welded. A valve mounted on a bearing portion of a port formed in a resin inlet manifold, wherein one valve main body and a shaft portion are integrally formed of a resin, and both ends of the shaft have complementary uneven shapes. A valve characterized in that a snap fit is formed. The valve according to claim 7, wherein the snap fit includes a concavo-convex shape that allows a change in a connection angle between the shafts while maintaining a connection state between the shafts.

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