JP2008201324A - Air intake system component mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air intake system component mounting structure which is less in the number of part items, superior in the vibration suppression effect and capable of maintaining high rigidity. <P>SOLUTION: The mounting structure of a resin-made air intake system component 2 is mounted on a vehicle body 6. The air intake system component 2 comprises an intake duct 5 as a body member and a long stay member 1. The stay member 1 has a body side mounting part 15 fixed to the intake duct 5 on one end and a counter side mounting part 16 mounted on the vehicle body 6 on the other end. The body side mounting part 15 has a hard resin-made part 11 having the high hardness. The counter side mounting part 16 has a soft resin-made part 12 having the hardness lower than that of the hard resin-made part 11, and a metal collar 3 is inserted therein. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an intake system component mounting structure used in a vehicle intake system, and more particularly to an intake system component mounting structure having vibration suppression effects and rigidity.

  In intake system parts such as an intake duct, intake pulsation occurs when taking outside air into the engine. For this reason, the intake system parts generate vibration and noise associated with intake. For this reason, when the intake system parts are attached to the vehicle body or the like, an attachment structure that absorbs vibration and noise is desired.

  Conventionally, for example, as shown in FIG. 4, a mounting structure for an intake system component in consideration of vibration absorption is made of a rubber part for suppressing vibration at the tip of the stay part 951 by projecting a stay part 951 from the intake duct 95. The grommet 952 is inserted. A mounting hole 953 is opened in the grommet 952, and a cylindrical metal collar 954 for preventing creep is press-fitted into the mounting hole 953. A bolt 955 is inserted into the metal collar and tightened against the vehicle body 96. Thereby, the intake duct 95 is fixed to the vehicle body 96.

  Further, in Patent Document 1, as shown in FIG. 5, a bracket portion 971 that protrudes integrally at the upper portion and the lower portion of the radiator 97 is formed, and a mounting portion 972 to the vehicle body is provided at the tip, and the base portion of the bracket portion 971 It is shown that a leg portion 973 that is elastically deformed is formed between 970 and the attachment portion 972. The mounting portion 972 has a bolt hole 974, into which a metal collar 975 is press-fitted. The radiator 97 is attached to the vehicle body by inserting the bolt into the metal collar 975 and tightening the bolt to the vehicle body. The vibration of the radiator 97 is absorbed by the leg portion 973 due to the elastic deformation of the leg portion 973 and the transmission to the vehicle body is suppressed.

In Patent Document 2, as shown in FIG. 6, two types of resin materials having different bending elastic moduli are bonded and fused to form a box-shaped molded product 98, and a main body 981 of the box-shaped molded product 98 is provided. It is shown that it is made of a resin material having a low bending elastic modulus, and the seal portion 982 is made of a resin material having a high bending elastic modulus. The seal part 982 is fastened to the other member 961 with a bolt 99.
JP-A-5-305825 JP-A-11-277572

  However, in the intake duct mounting structure shown in FIG. 4, a grommet 952 is interposed between the vehicle body 96. For this reason, the number of parts is large, it takes time to assemble, and the number of assembling steps also increases.

  In the mounting structures of Patent Documents 1 and 2, the grommet is not used, so the number of parts is small. However, in Patent Document 1, as shown in FIG. 5, since the spring characteristics are determined by the rigidity and shape of the bracket portion 971, sufficient vibration damping performance may not be obtained. In Patent Document 2, as shown in FIG. 6, the opening of the box-shaped molded product 98 is directly covered with another member 961. For this reason, the vibration of the box-shaped molded product 98 is easily transmitted to the other member 961.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a mounting structure for an intake system component having a small number of components, excellent vibration suppression effect, and high rigidity.

  The present invention relates to a resin intake system component mounting structure that is attached to a mating member. The air intake system component has a main body member and a main body side mounting portion fixed to the main body member on one end side, and the other end side. It has a stay member that has a mating mounting part that is attached to the member, the main body mounting part has a hard resin part, and the mating side mounting part has a soft resin part whose hardness is lower than that of the hard resin part. And a metal collar is inserted.

  Moreover, it is preferable that a stay member has a hollow part inside.

  In the intake system component mounting structure of the present invention, a stay member having a soft resin portion and a hard resin portion is fixed to the main body member. The hard resin portion is formed on the main body side mounting portion for fixing the main body member, and the soft resin portion is formed on the mating side mounting portion attached to the mating member. For this reason, since a hard resin part is fixed with respect to a main body member, the rigidity of a main body side attaching part is securable. In addition, vibration generated in the intake system parts is absorbed by the soft resin portion. For this reason, vibration transmission between the intake system component and the counterpart member can be reduced.

  Moreover, the other party attachment part has a soft resin part, and the metal color | collar is inserted in it. For this reason, even if the soft resin portion is bent by vibration, the fastening member such as a bolt is securely held by the metal collar. Therefore, creep of the counterpart attachment portion can be prevented, and the attachment state of the stay member to the counterpart member can be stably maintained.

  Further, since the stay member mainly absorbs vibrations at the soft part, it is not necessary to separately attach a vibration absorbing member such as a grommet member. Therefore, the number of parts is small and assembly man-hours can be reduced.

  Furthermore, when the stay member has a hollow portion therein, vibration is effectively absorbed in the hollow portion. It also leads to weight reduction of intake system parts.

  As described above, according to the present invention, it is possible to provide an intake system component mounting structure having a small number of components, excellent vibration suppression effect, and high rigidity.

  An intake system component mounting structure according to the present invention includes an intake system component having a main body member and a stay member for mounting, and a mating member to which the intake system component is mounted by the stay member.

  The main body member of the intake system component is, for example, an intake duct, a resonator, or the like. The stay fixing portion to which at least the stay member of the main body member is fixed is preferably formed using a hard resin such as PP (polypropylene) or PA (polyamide). Thereby, the rigidity of a stay fixing | fixed part becomes high, and a stay member can be stably fixed together with the hard resin of the main body side attaching part of a stay member.

  The mating member is a vehicle body, an engine member, or the like, and is formed of metal or resin.

  The stay member has a main body side mounting portion on one end side. The main body side attachment portion is a portion fixed to the main body member in the stay member. The main body side mounting portion preferably has a flange portion that extends in the circumferential direction of the stay member in order to securely fix the main body member to the main body member.

  The stay member has a counterpart mounting portion on the other end side. The counterpart attachment portion is a portion attached to the counterpart member in the stay member. A cylindrical metal collar is inserted into the counterpart mounting portion. A fastening member such as a bolt is inserted into the inner hole of the metal collar.

  The main body side mounting portion has a hard resin portion. The hard resin portion is formed on the whole or a part of the main body side attachment portion. By forming the hard resin portion on at least a part of the main body side mounting portion, the rigidity of the main body side mounting portion can be ensured.

  The “hard resin portion” is harder than the soft resin portion forming the counterpart mounting portion, and has a higher hardness than the soft resin portion. The hardness of the hard resin part is preferably 85 ° (durometer type A) or more. When the angle is less than 85 °, the rigidity of the main body side attachment portion is lowered, and the stay member may be detached from the main body member due to vibration or the like. More preferably, the hardness of the hard resin portion is 90 ° or more. Thereby, the rigidity of the solid-side mounting portion can be ensured, and the stay member is securely held with respect to the main body member.

  The counterpart mounting portion has a soft resin portion having a hardness lower than that of the hard resin portion. The soft resin portion is formed on the whole or a part of the counterpart mounting portion. Since the soft resin portion is formed on at least a part of the mating attachment portion, the vibration absorption of the mating attachment portion can be exhibited.

  The hardness of the soft resin portion is preferably less than 85 ° and smaller than the hardness of the hard resin portion. Such a soft resin portion can sufficiently absorb vibration and reduce vibration transmission between the main body member and the counterpart member. The lower limit of the hardness of the soft resin portion is preferably 40 °. When the angle is less than 40 °, the soft resin portion may be excessively bent due to vibration and may amplify the vibration. More preferably, the soft resin portion has a hardness of 40 to 80 °. In this case, the vibration absorbability of the soft resin portion is further increased.

  The hard resin portion can be formed using a hard resin such as PP (polypropylene), PA6 (polyamide 6), or PBT (polybutylene terephthalate). Moreover, you may harden by mixing a filler with resin material. In this case, as the resin material, it is preferable to use a soft resin used in the soft resin portion from the viewpoint of compatibility. Moreover, an inorganic filler, a metal filler, etc. can be used as a filler.

  The soft resin portion can be formed using, for example, TPO (thermoplastic polyolefin resin), PA11 (polyamide 11), TEEE (thermoplastic polyether ester elastomer), or the like. From the viewpoint of compatibility with the hard resin portion, when the hard resin portion is PP, TPO is used for the soft resin portion, and when the hard resin portion is PA6, PA11 is used for the soft resin portion, and the hard resin portion is PBT. In this case, it is preferable to use TEEE for the soft resin portion.

  The hard resin portion is preferably welded to the soft resin portion at the time of molding. Furthermore, it is preferable that the boundary between the hard resin portion and the soft resin portion has a gradually changing portion in which both resins are compatible and the components are gradually changed. Thereby, the connection intensity | strength of a hard resin part and a soft resin part becomes high. Thus, when welding a hard resin part and a soft resin part, or forming a gradual change part, hard resin and soft resin are joined in a molten state. Specifically, a hard resin and a soft resin are continuously extruded, and the extruded intermediate is molded with a mold. Alternatively, a hard resin and a soft resin are separately injected into a mold, and both the molten resins are joined in the mold.

  Another base material part may be formed between the hard resin part and the soft resin part. Also in this case, the main body side attachment portion attached to the main body member is formed of a hard resin portion, and the counterpart side attachment portion attached to the counterpart member is formed of a soft resin portion. For this reason, both rigidity and vibration absorbability can be exhibited.

  The inside of the stay member may have a hollow portion. In this case, weight reduction and vibration absorption performance are more effectively expressed. The hollow portion may be formed in either the hard resin portion or the soft resin portion, but is preferably formed in both.

  The stay member is molded separately from the main body member. In molding the stay member, two-color blow molding and two-color injection molding can be performed. The stay member is inserted into a mold when the main body member is formed, and the main body member is formed. Further, the stay member may be clamped to the main body member later.

  The metal collar inserted into the counterpart mounting portion of the stay member may be inserted when the stay member is molded, or may be press-fitted after the stay member is molded.

  The main body member can be formed by injection molding, blow molding, or the like using a resin material such as PP (polypropylene) or PA (polyamide).

  Embodiments of the present invention will be described with reference to the drawings.

(Example 1)
In this example, as shown in FIGS. 1 and 2, there is a mounting structure of a resin intake system component 2 that is mounted on a vehicle body 6 of a vehicle. The intake system component 2 includes an intake duct 5 as a main body member and a long stay member 1. The stay member 1 has a main body side attachment portion 15 fixed to the intake duct 5 at one end, and a mating side attachment portion 16 attached to the vehicle body 6 at the other end. The main body side attaching portion 15 has a hard resin portion 11 having high hardness. The counterpart mounting portion 16 has a soft resin portion 12 having a hardness lower than that of the hard resin portion 11 and has a metal collar 3 inserted therein.

  The main body side attachment portion 15 has a flange portion 151 that extends in the circumferential direction of the stay member 1. The flange portion 151 is locked to a locking portion 51 that extends integrally from the side wall 50 of the intake duct 5.

  An attachment hole 161 is formed in the soft resin portion 12 of the counterpart attachment portion 16, and the cylindrical metal collar 3 is inserted into the attachment hole 161. Bolts 4 are inserted into the metal collar 3 and fastened to the vehicle body 6 together with nuts 41.

  The counterpart mounting portion 16 is formed in a parallel portion 169 extending parallel to the mounting surface 61 of the vehicle body 6. The main body side attachment portion 11 is formed in an inclined portion 159 that is slightly inclined with respect to the counterpart attachment portion 16. A boundary 13 between the hard resin portion 11 and the soft resin portion 12 is formed in the middle of the inclined portion 159. In addition, the hard resin portion 11 and the soft resin portion 12 are welded to each other, and a gradually changing portion 13 in which each component of the hard resin and the soft resin gradually changes is formed at the boundary.

  The hard resin portion 11 forming the main body side attachment portion 15 has a hardness of 95 to 98 ° and is molded of PP. The soft resin portion 12 forming the mating side attachment portion 16 has a hardness of 73 to 80 ° and is molded from TPO. The hard resin portion 11 and the soft resin portion 12 are compatible with each other at a substantially central portion of the stay member 1 to form a gradually changing portion 13. In the gradually changing portion 13, the proportion of the hard resin gradually increases from the soft resin as it approaches the hard resin portion 11, and the proportion of the soft resin gradually increases from the hard resin as it approaches the soft resin portion 12.

  The cross-sectional shape orthogonal to the longitudinal direction of the stay member 1 is a substantially square shape. The thickness of the stay member 1 is uniform at the parallel portion 169, but gradually increases as the inclined portion 159 approaches the main body side attachment portion 15.

  In forming the stay member 1, the PP material and the TPO material are melted separately. The molten PP material is extruded from a double cylindrical die, and then the TPO material is extruded from the die to obtain a two-color parison (cylindrical polymer melt) in which the PP material and the TPO material are arranged in the longitudinal direction. In the two-color parison, a boundary portion between the PP material and the TPO material is melted and welded to each other, and a gradually changing portion in which the components of both materials gradually change is formed. A two-color parison is placed in the stay member mold and clamped. The mold hole has a smaller volume than the parison. For this reason, the parison is crushed by the mold surface by mold clamping, and formed into the shape of the stay member. At this time, the cavity in the parison is crushed by the mold, and a solid stay member is obtained. After cooling, the mold is opened and the stay member is taken out. The metal collar 3 is press-fitted into the mounting hole 161 of the counterpart mounting portion 16 of the stay member 1.

  Next, the stay member is set in a mold for forming an intake duct, and a parison made of a hard resin such as PP or PA is extruded and blown to form an intake duct. At this time, the flange portion 111 of the stay member 1 is locked by the locking portion 51 of the intake duct 5.

  Next, the bolt 4 is inserted into the middle hole 31 of the metal collar 3 of the mounting hole 161 of the stay member 1 and fastened to the metal vehicle body 6 with the bolt 6.

  In this example, a stay member 1 having a hard resin portion 11 and a soft resin portion 12 is fixed to the main body member 5 of the intake system component 2. The hard resin portion 11 is formed on a main body side attachment portion 15 that fixes the main body member 5, and the soft resin portion 12 is formed on a mating side attachment portion 16 that is attached to the vehicle body 6. For this reason, the rigid resin part 11 is fixed with respect to the main body member 5, and the rigidity of the main body side attaching part 15 is securable. Further, vibration generated in the intake system component 2 is absorbed by the soft resin portion 12. For this reason, transmission of vibration to the vehicle body 6 is suppressed.

  In addition, a metal collar 3 formed of a metal material is inserted into the mating attachment portion 6. For this reason, even if the soft resin portion 12 is bent by vibration, the bolt 4 can be reliably held by the metal collar 3.

  Further, since the stay member 1 mainly absorbs vibration by the soft resin portion 12, it is not necessary to separately assemble a vibration absorbing member such as a grommet member. Therefore, the number of parts is small and assembly man-hours can be reduced.

(Example 2)
As shown in FIG. 3, the attachment structure of the intake system component of this example is the same as that of Example 1 except that a hollow portion 10 is provided inside the stay member 1.

  The hollow portion 10 inside the stay member 1 is formed as one large hollow portion across both the hard resin portion 11 and the soft resin portion 12. The hollow portion 10 surrounds the periphery of the mounting hole 161 and is continuously formed on the other end side of the stay member 1.

  In forming the stay member, blow molding is performed. First, similarly to Example 1, PP for forming the hard resin portion and TPO for forming the soft resin portion are sequentially extruded to form a parison. Put the parison into the mold for the stay member and clamp it. The mold hole has a larger volume than the parison. Next, air is blown into the parison in the mold from the nozzle to expand the parison. The expanded parison is formed on the stay member by the mold surface. After cooling, the mold is opened and the stay member is taken out. Thereafter, the stay member is inserted into the intake duct mold in the same manner as in Example 1 to form the intake duct.

  In this example, a hollow portion 10 is formed inside the stay member 1. For this reason, vibration is effectively absorbed by the hollow portion 10. In addition, the intake system component 2 can be reduced in weight.

  Further, in the stay member 1 of this example, as in the first embodiment, the main body side attachment portion 15 fixed to the intake duct is formed of the hard resin portion 11, and the counterpart side attachment portion 16 attached to the vehicle body 6 is a soft resin. The portion 12 is formed. For this reason, the stay member 1 has both rigidity and vibration absorption.

It is sectional drawing of the attachment structure of the intake system components of Example 1. FIG. 1 is a perspective view of an intake system component of Embodiment 1. FIG. It is sectional drawing of the stay member of Example 2. FIG. It is sectional drawing of the attachment structure of the intake system components of a prior art example. It is principal part sectional drawing of the bracket part of another prior art example. It is sectional drawing of the box-shaped molded product of another prior art example.

Explanation of symbols

  1: Stay member, 2: Intake system part, 3: Metal collar, 4: Bolt, 5: Intake duct, 6: Car body, 10: Hollow part, 11: Hard resin part, 12: Soft resin part, 13: Gradual change Part

Claims (2)

In the mounting structure of resin-made intake system parts attached to the mating member,
The intake system component has a main body member, and a stay member having a main body side attaching portion fixed to the main body member on one end side and a mating side attaching portion attached to the counterpart member on the other end side,
The main body side mounting portion has a hard resin portion,
The mounting structure for an intake system component, wherein the counterpart mounting portion has a soft resin portion whose hardness is lower than that of the hard resin portion, and a metal collar is inserted.   The intake system component mounting structure according to claim 1, wherein the stay member has a hollow portion therein.

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