JP5249261B2 - Throttle valve device - Google Patents

Description

  The present invention relates to a throttle valve device that is mounted on an internal combustion engine such as an automobile and operates an opening of an intake passage.

  Conventionally, in a throttle valve device including a throttle valve and a throttle body having a cylinder portion that accommodates the throttle valve, as a means for fastening other members such as an intake manifold to one end side in the axial direction of the cylinder portion, There are some which provide a connecting portion and fasten the connecting portion and other members with bolts.

  For example, as shown in FIG. 7, in the throttle valve device 100 of Patent Document 1, in the resin throttle body 101, a connecting portion is provided at the outer periphery of the portion including the axial position of the cylindrical portion 102 where the throttle valve 103 is supported. 104 is formed, and a metal collar 106 is held in the connecting portion 104. Then, the cylindrical portion 102 is disposed on the other end side of the other member 108, the bolt 107 is inserted into the collar 106, the bolt 107 is screwed into the other member 108, and the collar 106 receives the axial force by the bolt 107, The throttle valve device 100 is fastened to the other member 108.

  However, in the throttle valve device 100 of Patent Document 1, since the collar 106 protrudes from the connecting portion 104 toward one end in the axial direction, the collar 106 collides with the other member 108 or the like when it is assembled to the other member 108. Damage may occur. When the damage is received, the holding force for holding the collar 106 of the connecting portion 104 decreases, and it becomes difficult for the collar 106 to receive the axial force by the bolt 107, or the cylindrical portion 102 is deformed by the deformation of the collar 106. There is a risk that problems such as these may occur.

  On the other hand, even if the collar 106 is damaged, if it can be identified from the appearance, it is possible to take appropriate measures before assembly. However, since the collar 106 is made of metal, it is difficult to determine the presence or absence of damage from the appearance.

JP 2007-285228 A

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to determine whether or not the throttle valve device and the other member collide with each other when the throttle valve device is assembled to another member. The purpose is to make it possible to discriminate damage to the appearance.

[Means of Claim 1]
A throttle valve device according to a first aspect of the present invention includes a resin throttle body having a cylindrical portion to which another member is fastened on one end side in the axial direction, and a throttle valve supported in the cylindrical portion. In addition, a connecting portion that protrudes radially outward is provided on the outer peripheral surface of the cylindrical portion on the other axial end side than the axial one end of the cylindrical portion, and the connecting portion protrudes on one axial end side. A metal collar is held to make it. Thus, by inserting the bolt into the collar and fastening the bolt to the other member, one end in the axial direction of the collar contacts the other member, and the collar receives the axial force of the bolt and is fastened to the other member.

  The throttle body has a ring-shaped member having a rigidity lower than that of the collar surrounding the outer periphery of the portion of the collar protruding toward the one end side in the axial direction from the connecting portion via a predetermined gap.

  According to this, when the throttle valve device is assembled to another member and the vicinity of the collar of the throttle body collides with the other member, the ring-shaped member is deformed or damaged. Thereby, by visually recognizing deformation or breakage of the ring-shaped member, it can be determined from the appearance that the collar has been damaged by the collision. As a result, when the ring-shaped member is deformed or broken, it is determined that the throttle valve device has collided with another member or the like, and measures can be taken against deformation of the throttle body or deformation of the collar.

  Further, since there is a gap between the ring-shaped member and the collar, the ring-shaped member is easily deformed and damaged, and it is easy to determine that the collar is damaged by the collision by the appearance.

  Patent Document 1 describes one in which one end of the collar is fitted into the positioning hole of the positioning flange provided in the cylindrical portion, but there is no gap between the collar and the positioning hole. The positioning flange portion is not easily deformed due to a collision or the like, and it is difficult to detect damage from the appearance by the positioning flange portion.

[Means of claim 2]
According to the throttle valve device of the second aspect, the ring-shaped member is provided integrally with the throttle body, and is provided so as to surround at least one end portion of the collar.
One end of the collar is the place where the collision with the other member is most likely to occur when the throttle valve device is assembled to the other member. For this reason, by providing a ring-shaped member around one end of the collar where collision is most likely to occur, damage due to collision or the like can be reliably detected by appearance.

[Means of claim 3]
According to the throttle valve device of the third aspect, the one end surface of the ring-shaped member is located on the other end side with respect to the one end surface of the cylindrical portion serving as a seal surface to the other member.
According to this, even when the throttle valve device is tilted and assembled to another member due to poor flatness of the seal surface, there is a step between the one end surface of the ring-shaped member and the seal surface. Therefore, it becomes difficult for the ring-shaped member to interfere with other members.

[Means of claim 4]
According to the throttle valve device of the fourth aspect, the ring-shaped member has a notch and intermittently surrounds the outer periphery of the collar.
According to this, the material used for a ring-shaped member can be reduced and cost can be reduced. In addition, by providing a notch, it becomes easier to break or deform when another member collides with the ring-like member on the same principle as a cantilever beam, and the appearance that the collar was damaged by the collision It becomes easy to detect.

[Means of claim 5]
According to the throttle valve device of the fifth aspect, the ring-shaped member has the low rigidity portion having lower rigidity than the other portions.
According to this, the ring-shaped member is easily damaged due to the collision of other members, and it is easy to detect the appearance of the collar being damaged by the collision.

[Means of claim 6]
According to the throttle valve device of the sixth aspect, the ring-shaped member surrounds the outer periphery at a plurality of positions in the axial direction of the collar.
According to this, the range in which the appearance that the collar is damaged by the collision can be detected by the appearance is expanded in the axial direction.

[Means of Claim 7]
According to the throttle valve device of the seventh aspect, the ring-shaped member is formed in a skirt shape that is connected to one end side of the connecting portion and covers the collar.
According to this, the range in which the appearance that the collar is damaged by the collision can be detected by the appearance is expanded in the axial direction.

(Example 1) which is a perspective view of a throttle valve device. (Example 1) which is a top view of a throttle valve apparatus. (A) is AA sectional drawing of the state assembled | attached to the intake manifold, (b) is explanatory drawing of a ring-shaped member (Example 1). (A) is a partial sectional view of the throttle valve device in a state assembled to the intake manifold (Example 2), (b) is a partial sectional view of the state in which the throttle valve device of Example 1 is assembled to the intake manifold. (C) is a fragmentary sectional view in the state where the throttle valve device of Example 2 was assembled to the intake manifold. (A) is explanatory drawing of a ring-shaped member (Example 3), (b) is explanatory drawing of a ring-shaped member (Example 4). (A) is sectional drawing of the throttle valve apparatus of the state assembled | attached to the intake manifold (Example 5), (b) is sectional drawing of the throttle valve apparatus of the state assembled | attached to the intake manifold (Example 6). (A) is a perspective view of a throttle valve device, (b) is a sectional view of a throttle valve device in a state assembled to another member (conventional example).

  A throttle valve device according to a first embodiment for carrying out the present invention includes a resin throttle body having a cylindrical portion to which another member is fastened on one axial end side, and a throttle valve supported in the cylindrical portion. In addition, a connecting portion that protrudes radially outward is provided on the outer peripheral surface of the cylindrical portion on the other axial end side than the axial one end of the cylindrical portion, and the connecting portion protrudes on one axial end side. A metal collar is held to make it. Thus, by inserting the bolt into the collar and fastening the bolt to the other member, one end in the axial direction of the collar contacts the other member, and the collar receives the axial force of the bolt and is fastened to the other member.

The throttle body has a ring-shaped member that is less rigid than the collar that surrounds the outer periphery of the protruding portion of the collar toward the one end side in the axial direction from the connecting portion via a predetermined gap.
The ring-shaped member is provided integrally with the throttle body, and is provided so as to surround at least one end of the collar.

In the throttle valve device according to the second embodiment for carrying out the present invention, the one end surface of the ring-shaped member is located on the other end side with respect to the one end surface of the cylindrical portion that serves as a sealing surface to the other member of the cylindrical portion.
In the throttle valve device according to the third embodiment for carrying out the present invention, the ring-shaped member has a notch and intermittently surrounds the outer periphery of the collar.
In the throttle valve device according to the fourth embodiment for carrying out the present invention, the ring-shaped member has a low-rigidity portion having lower rigidity than other portions.

In the throttle valve device according to the fifth embodiment for carrying out the present invention, the ring-shaped member surrounds the outer periphery of a plurality of locations in the axial direction of the collar.
In the throttle valve device according to the sixth embodiment for carrying out the present invention, the ring-shaped member is formed in a skirt shape that is connected to one end side of the connecting portion and covers the collar.

[Configuration of Example 1]
The configuration of the throttle valve device 1 according to the first embodiment will be described with reference to FIGS.
The throttle valve device 1 is mounted on a vehicle such as an automobile, for example, and changes the intake air amount supplied into the combustion chamber of each cylinder of the internal combustion engine based on the accelerator operation amount of the driver.

  The throttle valve device 1 forms a butterfly valve type throttle valve 2 (see FIGS. 2 and 3) driven according to the accelerator operation amount of the driver, an intake passage to the internal combustion engine, and the throttle valve 2 And a throttle body 3 for housing the engine.

The throttle body 3 is made of resin and has a cylinder portion 5 whose inside serves as an intake passage, and a drive chamber 6 that houses a motor and the like for driving the throttle valve 2.
Then, another member (for example, an intake manifold 7) is connected to one end side in the axial direction of the cylindrical portion 5 via a gasket 8 (see FIG. 3).

A flange 10 that protrudes radially outward is formed on the outer peripheral surface of the cylindrical portion 5 on the other end side with respect to one end in the axial direction. The flange 10 is spaced by 90 degrees in the circumferential direction of the cylindrical portion 5. In this way, four connection portions 11 are provided (see FIGS. 1 and 2).
The connecting portion 11 is provided so as to protrude outward in the radial direction of the cylindrical portion 5 from the other portion of the flange 10, and the connecting portion 11 is formed with a through hole 12 penetrating in the axial direction.

A metal collar 14 is hot-pressed into the through hole 12, and the collar 14 is fixed so as to protrude to one end side in the axial direction of the connection portion 11.
And the cylinder part 5 is arrange | positioned at the other end side of the intake manifold 7, the volt | bolt 15 is inserted in the collar 14, and the volt | bolt 15 is screwed to the nut 17 fixed to the intake manifold 7, and the cylinder part 5 and an intake are taken. The manifold 7 is fastened. At this time, the collar 14 abuts on the intake manifold 7 and receives an axial force by the bolt 15.

  The throttle valve 2 includes a throttle shaft 18 and a valve body 19 fixed to the throttle shaft 18, and when the throttle shaft 18 is rotationally driven by a motor, the valve body 19 rotates in the cylinder portion 5. The opening degree of the intake passage in the cylinder part 5 is changed.

  In the present embodiment, the flange having the connecting portion 11 is used to prevent the tubular portion 5 from being deformed by the fastening of the tubular portion 5 and the intake manifold 7 and the valve body 19 coming into contact with the inner peripheral surface of the tubular portion 5. 10 is provided in the vicinity of the axial position where the valve body 19 is supported in the cylindrical portion 5. According to this, since the wall of the cylinder part 5 of the part in which the connection part 11 was formed receives the force to radial direction outward at the time of fastening, the contact with the inner peripheral surface of the cylinder part 5 and the valve body 19 is avoided. be able to.

[Features of Example 1]
The throttle valve device 1 according to the first embodiment includes a ring-shaped member 23 that surrounds an outer periphery of a portion of a collar 14 (hereinafter referred to as a collar exposed portion 20) protruding from the connecting portion 11 toward one end in the axial direction via a predetermined gap 21. Have

That is, a ring-shaped member 23 is provided on the outer peripheral surface of one end portion of the cylindrical portion 5 so as to protrude outward in the radial direction. The one end surface 24 of the ring-shaped member 23 is flush with the one end surface 25 of the cylindrical portion 5 that serves as a seal surface for the intake manifold 7.
The ring-shaped member 23 has a through hole 27 larger than the outer diameter of the collar exposed portion 20, and the collar 14 is inserted into the through-hole 27, so that the ring-shaped member 23 becomes one end of the collar 14. The outer periphery of 28 is enclosed via the gap 21.

The ring-shaped member 23 is made of a resin provided integrally with the cylindrical portion 5, and has a lower rigidity than the collar 14.
The ring-shaped member 23 is provided so as to surround one end portion 28 of each collar 14, and the ring-shaped members 23 are connected to each other in the circumferential direction outside the cylindrical portion 5 to form a flange 30 (see FIG. 1). ).

[Effect of Example 1]
The throttle valve device 1 according to this embodiment includes a ring-shaped member 23 having a lower rigidity than the collar 14 that surrounds the outer periphery of the collar exposed portion 20 via a predetermined gap 21.
According to this, when the throttle valve device 1 is assembled to the intake manifold 7, if the vicinity of the collar exposed portion 20 hits the intake manifold 7 or the like, the resin ring-shaped member 23 is deformed or damaged.

  Thereby, by visually recognizing deformation or breakage of the ring-shaped member 23, it is possible to determine from the appearance that the collar 14 has been damaged by the collision. As a result, when the ring-shaped member 23 is deformed or damaged, it is determined that the throttle valve device 1 has collided with the intake manifold 7 or the like, and measures can be taken against deformation of the throttle body 3 or deformation of the collar 14. it can.

  Further, since there is a gap 21 between the ring-shaped member 23 and the collar 14, the ring-shaped member 23 is easily deformed and damaged, and it is easy to determine that the collar 14 has been damaged due to collision by the appearance.

The ring-shaped member 23 is provided integrally with the cylinder portion 5 of the throttle body 3 and is provided so as to surround at least one end portion 28 of the collar 14.
One end portion 28 of the collar 14 is a portion where the collision is most likely to occur when the throttle valve device 1 is assembled to the intake manifold 7. For this reason, by providing the ring-shaped member 23 at a place where collision is most likely to occur, damage due to collision or the like can be reliably detected by appearance.

[Configuration of Example 2]
The configuration of the throttle valve device 1 according to the second embodiment will be described with reference to FIG. 4 with a focus on differences from the first embodiment.
In the throttle valve device 1 according to the second embodiment, the one end surface 24 of the ring-shaped member 23 is located on the other end side with respect to the one end surface 25 of the cylindrical portion 5 that serves as a seal surface to the intake manifold 7. That is, a step is generated in the axial direction between the one end surface 24 of the ring-shaped member 23 and the one end surface 25 of the cylindrical portion 5 (see FIG. 4A).

  If the one end surface 24 of the ring-shaped member 23 and the one end surface 25 of the cylindrical portion 5 are flush with each other as in the first embodiment, the cylindrical portion 5 is attached to the intake manifold 7 due to poor flatness of the sealing surface. When it is assembled at an angle, the ring-shaped member 23 may interfere with the intake manifold 7 depending on the shapes of the intake manifold 7 and the cylindrical portion 5 (see FIG. 4B).

  On the other hand, as in the second embodiment, if there is a step in the axial direction between the one end surface 24 of the ring-shaped member 23 and the one end surface 25 of the tube portion 5, the tube portion 5 is inclined to the intake manifold 7. Even when assembled, the ring-shaped member 23 is less likely to interfere with the intake manifold 7 (see FIG. 4C).

[Configuration of Example 3]
The configuration of the throttle valve device 1 according to the third embodiment will be described with reference to FIG.
In the throttle valve device 1, the ring-shaped member 23 has a notch 32 and intermittently surrounds the outer periphery of the collar 14.

According to this, the material (resin in a present Example) used for the ring-shaped member 23 can be reduced, and cost can be reduced.
Further, by providing the notch 32, the collar 14 is intermittently surrounded by the two protruding pieces 33 protruding from the outer peripheral surface of the cylindrical portion 5.
For this reason, on the same principle as a cantilever beam, damage and deformation are likely to occur when the intake manifold 7 or the like collides with the ring-shaped member 23, and it is easy to detect by appearance that the collar 14 has been damaged by collision. Become.

[Configuration of Example 4]
The configuration of the throttle valve device 1 according to the fourth embodiment will be described with reference to FIG. 5B, focusing on differences from the first embodiment.
In the throttle valve device 1 according to the fourth embodiment, the ring-shaped member 23 has a low-rigidity portion 35 that is less rigid than other portions. For example, a cut in the radial direction is made in a part of the ring-shaped member 23 to form the thin portion 36 as the low-rigidity portion 35.
According to this, the ring-shaped member 23 is easily damaged due to the collision of the intake manifold 7 and the like, and it is easy to detect by appearance that the collar 14 has been damaged by the collision.

[Configuration of Example 5]
The configuration of the throttle valve device 1 according to the fifth embodiment will be described with reference to FIG. 6A with a focus on differences from the first embodiment.
In the throttle valve device 1 according to the fifth embodiment, the ring-shaped member 23 surrounds the outer periphery at a plurality of locations in the axial direction of the collar 14. For example, as shown in FIG. 6A, two ring-shaped members 23 are provided vertically in the axial direction.
According to this, the range in which the appearance of detecting that the collar 14 has been damaged by the collision is expanded in the axial direction.

[Configuration of Example 6]
The configuration of the throttle valve device 1 according to the sixth embodiment will be described with reference to FIG. 6B with a focus on differences from the first embodiment.
In the throttle valve device 1 according to the sixth embodiment, the ring-shaped member 23 is formed in a skirt shape that covers the collar 14 by being connected to one end side of the connecting portion 11.

That is, the ring-shaped member 23 extends from the one end side of the connecting portion 11 in a skirt shape, and the ring-shaped member 23 covers the entire color exposed portion 20.
According to this, the range in which the appearance that the collar 14 is damaged due to the collision can be detected by the appearance is expanded to the entire axial direction of the color exposed portion 20.

[Modification]
The aspect of the throttle valve device 1 is not limited to the embodiment, and various modifications can be considered. For example, the ring-shaped member 23 is not provided on the outer periphery of the collar exposed portion 20 of all the collars 14 but the ring-shaped member 23 is provided only on the outer periphery of the collar exposed portion 20 that is likely to collide with the intake manifold 7 or the like. It may be provided. For example, the collar 14 adjacent to the drive chamber 6 is less likely to collide directly with the intake manifold 7 due to the presence of the drive chamber 6. In this case, the ring-shaped member 23 may be provided only for the collar 14 other than the collar 14 that is close to the drive chamber 6.

  In the first embodiment, the ring-shaped members 23 are connected to each other in the circumferential direction on the outer side of the cylindrical portion 5 to form the flange 30 surrounding the outer periphery of the cylindrical portion 5. There is no need to connect outside.

  In the fourth embodiment, the low-rigidity portion 35 is formed by cutting the ring-shaped member 23 in the radial direction. However, the present invention is not limited to this mode. For example, the wall thickness of a part of the ring-shaped member 23 ( The low rigidity portion 35 may be formed by reducing the axial thickness).

DESCRIPTION OF SYMBOLS 1 Throttle valve apparatus 2 Throttle valve 3 Throttle body 5 Cylinder part 7 Intake manifold (other members)
11 Connection part 14 Collar 15 Bolt 20 Color exposure part (The part of the collar which protruded to the axial direction one end side from the connection part)
21 Crevice 23 Ring-shaped member 24 One end surface 25 of the ring-shaped member One end surface 28 of the cylindrical portion One end portion 32 of the collar Notch 35 Low rigidity portion

Claims (7)

A resin throttle body having a cylindrical portion to which another member is fastened at one end in the axial direction;
A throttle valve supported in the cylindrical portion,
On the other end side in the axial direction than the one axial end of the cylindrical portion, a connecting portion that protrudes radially outward is provided on the outer peripheral surface of the cylindrical portion,
In the connection portion, a metal collar is held so as to protrude to one end side in the axial direction,
By inserting a bolt into the collar and fastening the bolt to the other member, one end in the axial direction of the collar abuts on the other member, and the collar receives an axial force from the bolt and fastens to the other member. A throttle valve device,
The throttle valve device according to claim 1, wherein the throttle body includes a ring-shaped member having a rigidity lower than that of the collar that surrounds an outer periphery of the portion of the collar protruding toward the one axial end side from the connection portion via a predetermined gap. The throttle valve device according to claim 1,
The said ring-shaped member is provided integrally with the said throttle body, and is provided so that at least the one end part of the said collar may be enclosed, The throttle valve apparatus characterized by the above-mentioned. The throttle valve device according to claim 1 or 2,
The throttle valve device according to claim 1, wherein one end surface of the ring-shaped member is located on the other end side with respect to one end surface of the cylindrical portion serving as a seal surface to other members. The throttle valve device according to any one of claims 1 to 3,
The throttle valve device, wherein the ring-shaped member has a notch and intermittently surrounds the outer periphery of the collar. In the throttle valve device according to any one of claims 1 to 4,
The throttle valve device characterized in that the ring-shaped member has a low-rigidity portion whose rigidity is lower than that of other portions. In the throttle valve device according to any one of claims 1 to 5,
The throttle valve device, wherein the ring-shaped member surrounds the outer periphery of a plurality of locations in the axial direction of the collar. In the throttle valve device according to any one of claims 1 to 5,
The throttle valve device, wherein the ring-shaped member is formed in a skirt shape that is connected to one end side of the connecting portion and covers the collar.

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