JP2006231966A - Rim wheel and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To heighten productivity of a rim wheel having a sound absorbing structure. <P>SOLUTION: In this rim wheel 10, a ring member 40 made of an elastic body is mounted to a rim outer periphery 20 of the wheel, so as to form an air chamber 70 between the member and the rim outer periphery. A Helmholtz resonator is constituted by at least one hole 46 formed on the ring member and the air chamber. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rim wheel having a sound absorbing structure and a manufacturing method thereof.

Conventionally, as a method of manufacturing a rim wheel that constitutes a Helmholtz resonator on a rim wheel, a belt-like lid member is wound around a circumferential direction of the rim to be installed and fixed, and both ends of the belt-like lid member are made of rubber. A technique for joining with an adhesive is known (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 2004-90669

  However, in the above-described conventional technology, it is necessary to join the both ends with a rubber adhesive after winding the belt-like lid member, so that there is an insufficient aspect that manufacturing is still not easy and there are many processes. .

  Accordingly, an object of the present invention is to provide a rim wheel having a sound absorbing structure that can be manufactured with fewer steps while maintaining high sound absorbing performance, and a method for manufacturing the rim wheel.

  In order to solve the above problems, according to one aspect of the present invention, an air chamber is formed between the rim outer peripheral surface and the ring member by attaching a ring member made of an elastic body to the rim outer peripheral surface of the wheel. A rim wheel is provided, wherein a Helmholtz resonator is constituted by at least one hole formed in a ring member and the air chamber.

  In this aspect, the ring member made of the elastic body may be formed of a rubber material. The wheel may include a seat surface that supports the ring member in the wheel circumferential direction, and the diameter of the seat surface may be set larger than the diameter of the ring member in a state before being attached to the wheel. Further, the wheel may include a seat surface that supports the ring member in the wheel circumferential direction, and the ring member may be in close contact with the seat surface by elastically deforming in the wheel circumferential direction in the attached state.

  Further, according to another aspect of the present invention, a ring member made of metal having a predetermined plate thickness is fixed to the rim outer peripheral surface of the wheel with an adhesive, so that the gap between the rim outer peripheral surface and the ring member is fixed. A rim wheel is provided, wherein an air chamber is formed, and a Helmholtz resonator is constituted by at least one hole formed in the ring member and the air chamber.

  In this aspect, the metal having the predetermined plate thickness may include a metal foil. Preferably, the metal having the predetermined plate thickness is made of a shape memory alloy.

  In each of the above aspects, the ring member or the wheel may be provided with a restraining unit that restrains the displacement of the ring member in the vehicle inside / outside direction with respect to the wheel.

According to another aspect of the present invention, the air chamber is formed between the rim outer peripheral surface and the ring member by covering the recess formed on the rim outer peripheral surface of the wheel with the ring member along the circumferential direction of the wheel. In the method of manufacturing a rim wheel having a sound absorbing structure, wherein the Helmholtz resonator is formed by at least one hole formed in the ring member and the air chamber.
The diameter of the ring member is set to be smaller than the diameter of the seat surface of the ring member formed along the circumferential direction on the rim outer peripheral surface of the wheel, and the ring member is configured so that the diameter can be expanded by elastic deformation, A rim wheel having a sound absorbing structure characterized in that when a ring member is attached to a wheel, the diameter of the ring member is enlarged and the ring member is fitted on the outer peripheral surface of the rim of the wheel so that the ring member is brought into close contact with the seat surface. A manufacturing method is provided.

  According to the present invention, it is possible to obtain a rim wheel having a sound absorbing structure that can be manufactured with few steps while maintaining high sound absorbing performance.

  Hereinafter, the best mode for carrying out the present invention will be described through each embodiment with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a first embodiment of a rim wheel 10 according to the present invention.

  The rim wheel 10 may be an ordinary disc wheel including a rim 12 for mounting and holding a tire and a disc 14 attached to a hub of a vehicle. Generally, a recess 22 is formed on the outer peripheral surface (rim outer peripheral surface) 20 of the rim wheel 10 facing the road surface. In the present embodiment, a ring member 40 is disposed on the outer peripheral surface 20 so as to cover the recess 22.

  FIG. 2 is a perspective view showing the entire ring member 40. The ring member 40 is formed of an elastic body made of a rubber material or the like, and includes a basic surface 42 that faces the outer peripheral surface 20 of the rim wheel 10. At least one hole 46 is formed in the basic surface 42. The diameter D2 of the basic surface 42 is set so as to be held with respect to the rim wheel 10 in a state where the ring member 40 is elastically deformed, as will be described later.

  Here, referring again to FIG. 1, seat surfaces 22 a and 22 b on which the ring member 40 is placed are set on the outer peripheral surface 20 of the rim wheel 10. The seating surfaces 22a and 22b constitute a support surface that supports the edge 44 of the basic surface 42 of the ring member 40 over the entire circumference of the wheel. In the example shown in FIG. 1, the edge 44 of the ring member 40 is a part of the basic surface 42 of the ring member 40, and thus has the same diameter D <b> 2 as the basic surface 42.

  The seat surfaces 22 a and 22 b are set on both sides of the recess 22 (both sides in the vehicle width direction) on the outer peripheral surface 20 of the rim wheel 10, and extend along the wheel circumferential direction in the same manner as the recess 22. The seating surfaces 22a and 22b may be realized using existing surfaces existing in a typical rim wheel.

  In this embodiment, the seat surfaces 22a and 22b are set to have the same diameter D1 with the wheel center as the center, and the diameter D1 is larger than the diameter D2 of the basic surface 42 (that is, D1 ≧ D2> concave portion 22). The diameter of the bottom). That is, the diameter D1 of the seating surfaces 22a and 22b is larger than the diameter D2 of the edge 44 of the ring member 40. Thereby, the ring member 40 is elastically deformed in the wheel circumferential direction in the attached state, and is brought into close contact with the seating surfaces 22a and 22b. The diameter D1 and the diameter D2 are determined by considering the material characteristics (such as elastic modulus) of the ring member 40, and the ring member 40 and its seating surfaces 22a and 22b due to elastic deformation of the ring member 40 in the mounted state. Are properly set so that a desired airtightness is established.

  In a state where the ring member 40 is attached to the rim wheel 10, an air chamber 70 is formed between the ring member 40 and the outer peripheral surface 20 of the rim wheel 10. That is, the ring member 40 covers the recess 22, so that the air chamber 70 is formed by the space in the recess 22. Since the air chamber 70 has a high airtightness between the edge 44 of the ring member 40 and the seating surfaces 22a and 22b due to the elastic deformation of the ring member 40 as described above, the air chamber 70 substantially passes through the hole 46. Only, it communicates with a space inside the tire (a donut-shaped space formed with the tire mounted). As a result, a Helmholtz resonator that absorbs air column resonance of the tire by air vibration of a given resonance frequency is formed with the hole 46 as an opening and the space in the recess 22 as an air chamber 70. The volume of the air chamber 70, the number of holes, and the like are appropriately determined depending on the frequency band of noise to be absorbed so that the resonance frequency matches the frequency band.

  FIG. 3 is a front view (viewed in the wheel radial direction) showing the rim wheel 10 with the ring member 40 attached thereto. FIG. 3 shows a state in which an air chamber 70 with the ring member 40 as a lid is opened to a space inside the tire through a hole 46. 1 to 3, the tire is omitted to show the inside of the tire, but in reality, the tire is mounted and the wheel is completed. Thus, according to the present embodiment, noise generated by input from the road surface or the like when the vehicle is traveling is absorbed by the above-mentioned Helmholtz resonator, and the quietness of the vehicle is improved.

  By the way, providing the rim wheel 10 with a sound absorbing structure as a Helmholtz resonator as described above effectively uses the space inside the tire and the normal structure (recess 22) of the rim wheel 10 to make the vehicle quiet as described above. It is useful in that it can enhance the sex. In this embodiment, it is possible to increase the productivity of the sound absorbing structure (lower the manufacturing cost) while maintaining such usefulness.

  Specifically, in the present embodiment, as described above, the lid of the air chamber 70 is constituted by the closed ring-shaped ring member 40, and therefore, for example, after winding the belt-shaped lid member, both ends thereof are adhesive. Compared with the conventional structure which joins by this, the process of adhesive-joining both ends is unnecessary. In other words, in the present embodiment, the ring member 40 is configured such that the diameter can be expanded by elastic deformation. Therefore, the ring member 40 remains in a closed ring shape, and the diameter of the ring member 40 is increased to increase the rim wheel. 10 and can be fitted to the outer peripheral surface 20, so that an end joining step for forming a ring shape after being attached to the rim wheel 10 is not required.

  In the present embodiment, as described above, the diameter D2 of the ring member 40 is set to be smaller than the diameter D1 of the seating surfaces 22a and 22b, so that the ring member 40 has a difference between the diameters in the mounted state. It will be in the state which elastically deformed by the part. Accordingly, even if the ring member 40 is not fixed to the rim wheel 10 with an adhesive or the like, high airtightness between the ring member 40 and the seat surfaces 22a and 22b, that is, the air chamber 70 functions appropriately as a Helmholtz resonator. Airtightness sufficient to make it possible can be realized. Therefore, according to the present embodiment, the process of bonding and fixing the ring member 40 to the rim wheel 10 can be made unnecessary.

  FIG. 4 shows an example of restraining means that may be applied to this embodiment. In the example shown in FIG. 4, the ring member 40 is provided with a protrusion 48 that restrains the displacement of the ring member 40 in the vehicle inside / outside direction (left-right direction in the figure) with respect to the rim wheel 10. The protrusions 48 may be formed integrally with the ring member 40, or may be separately attached to the ring member 40 by adhesion or the like. The outer peripheral surface 20 of the rim wheel 10 may be formed with a recess (such as a dent or depression) into which the protrusion 48 of the ring member 40 is fitted. Thereby, since the displacement of the projection 48 with respect to the rim wheel 10 can be surely restrained, the ring member 40 can be attached to the rim wheel 10 without using an adhesive or the like as described above, even when used or manufactured. The positional deviation of the ring member 40 at the time can be reliably prevented. Note that the protrusion 48 and the recess can also function as positioning means when the ring member 40 is mounted.

  The present invention is not particularly limited to the protrusion 48 as shown in FIG. 4, and any configuration can be used as long as it can mechanically restrain the displacement of the ring member 40 with respect to the rim wheel 10 in the vehicle inside / outside direction. A restraint means may be set. For example, a similar protrusion may be formed on the rim wheel side, and a step (seed) where the side surface of the edge 44 of the ring member 40 abuts is formed on the seat surfaces 22a and 22b on the rim wheel side. Also good.

  FIG. 5 is a sectional view showing a second embodiment of the rim wheel according to the present invention. The second embodiment is different from the first embodiment only in the material of the ring member 40 and the method of attaching the ring member 40 to the rim wheel 10, and the other parts are the same as those in the first embodiment. To do.

  The ring member 40 of the present embodiment is made of metal. The thickness of the ring member 40 is set so that the ring member 40 can be attached to the rim wheel 10 while maintaining the ring shape as described above, and has elasticity so that it can be restored to its original shape after being mounted. Is done. On the other hand, the plate thickness of the ring member 40 is set so as to have an appropriate rigidity that does not easily deform or break during use. As long as this requirement is satisfied, the ring member 40 may be formed of other materials such as resin.

  Preferably, the ring member 40 is formed of a thin metal plate, that is, a metal foil (for example, an aluminum foil). In this case, the ring-shaped member 40 may be configured by cutting the tape-shaped metal foil with an appropriate length to form a ring shape having a diameter D2, and joining both ends in advance. The ring member 40 may be composed of a plurality of layers of metal foil.

  More preferably, the ring member 40 is formed of a thin plate of shape memory alloy. In this case, even if unexpected input or the like is applied to the ring member 40 at the time of assembly or use, the shape is restored to the predetermined shape, so that the expected shape can be maintained for a long period of time, and the stable sound absorption performance can be exhibited. A sound absorbing structure with good characteristics can be realized.

  The ring member 40 of this embodiment is fixed to the rim wheel 10 with an adhesive 80. This is because the ring member 40 and the rim wheel 10 are made of the same metal material, and thus high adhesion as in Example 1 is not ensured. The adhesive 80 may be an appropriate adhesive according to the material of the ring member 40, or may be an adhesive applied to another medium such as a double-sided tape.

  In the present embodiment, the adhesive 80 preferably has a seat surface 22a on the rim wheel side so as to ensure high adhesion between the ring member 40 and the rim wheel 10 over the entire wheel circumferential direction. It is applied over the entire wheel circumferential direction on 22b.

  Thus, also in the second embodiment, the lid of the air chamber 70 is constituted by the closed ring-shaped ring member 40 as in the first embodiment. For example, after winding a band-shaped lid member, both ends thereof are wound. Compared to the conventional configuration in which the parts are bonded and bonded, the process of bonding and bonding the both end parts becomes unnecessary, and the productivity of the rim wheel 10 having the sound absorbing structure can be increased.

  In the second embodiment, the diameter D2 of the ring member 40 may be the same as the diameter D1 of the seat surfaces 22a and 22b on the rim wheel side. However, if possible, the diameter D1 is the same as in the first embodiment. You may set smaller than. In this case, due to the elastic deformation of the ring member 40, the adhesion by the adhesive 80 is increased.

  Also in the second embodiment, a restraining means (such as the protrusion 48) described in the first embodiment with reference to FIG. 4 may be set. In the second embodiment, the restraining unit functions as a positioning unit when the ring member 40 is mounted, and also functions as a positional deviation prevention unit until the curing by the adhesive 80 is completed.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in the above-described embodiment, the ring member 40 having the flat basic surface 42 is illustrated as a simple configuration. However, the ring member 40 may have a plurality of surfaces having different diameters. The configuration may be such that changes in the vehicle interior and exterior directions. Therefore, in the above-described embodiment, since the edge portion 44 of the ring member 40 has the same diameter D2 as the basic surface 42, the relationship between the diameter D2 of the basic surface 42 and the diameter D1 of the seating surfaces 22a and 22b is specified. . However, it is within the scope of the present invention if the diameter of the edge 44 of the ring member 40, more precisely, the diameter of the supported surface of the ring member 40 is smaller than the diameter D1 of the seating surfaces 22a and 22b.

  In the embodiment described above, as a preferred configuration, the two seating surfaces 22a and 22b have the same diameter D1, but the two seating surfaces 22a and 22b may have different diameters. In this case, for example, a step is set on the basic surface 42 of the ring member 40 so that the two edge portions 44 on both sides of the ring member 40 have diameters corresponding to the diameters of the corresponding seating surfaces 22a and 22b. That's fine. Alternatively, when the difference between the diameters of the seat surfaces 22a and 22b is not so large, the difference may be absorbed by elastic deformation of the ring member 40. Such a configuration may be particularly necessary when attaching the above-described ring member 40 without changing the existing rim wheel 10 that does not have the seat surfaces 22a and 22b having the same diameter D1.

  Moreover, the ring member 40 may be provided with a rib or a bead for ensuring necessary rigidity.

  In the illustrated embodiment, the ring member 40 is provided with only one hole 46. However, the ring member 40 may be provided with two or more holes 46. It may be divided by a partition plate and divided into a plurality of air chambers.

It is sectional drawing which shows Example 1 of the rim wheel 10 by this invention. FIG. 3 is a perspective view showing the entire ring member 40. It is a figure which shows the rim wheel 10 of the state to which the ring member 40 was attached. It is a figure which shows an example of a restraint means roughly. It is sectional drawing which shows Example 2 of the rim wheel by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rim wheel 12 Rim 14 Disc 20 Outer peripheral surface 22 Recessed part 40 Ring member 42 Basic surface 44 Edge part 46 Hole 48 Projection 70 Air chamber 80 Adhesive

Claims (9)

  By attaching a ring member made of an elastic body to the rim outer peripheral surface of the wheel, an air chamber is formed between the rim outer peripheral surface and the ring member, and at least one hole formed in the ring member and the air chamber A rim wheel comprising a Helmholtz resonator.   The rim wheel according to claim 1, wherein the ring member made of the elastic body is made of a rubber material.   The rim wheel according to claim 1, wherein the wheel includes a seat surface that supports the ring member in a circumferential direction of the wheel, and the diameter of the seat surface is larger than a diameter of the ring member in a state before being attached to the wheel. The wheel includes a bearing surface that supports the ring member along the circumferential direction of the wheel,
The rim wheel according to claim 1 or 2, wherein the ring member is in close contact with the seat surface by elastically deforming in the wheel circumferential direction in the attached state.   An air chamber is formed between the rim outer peripheral surface and the ring member by fixing a ring member made of metal having a predetermined plate thickness to the wheel rim outer peripheral surface with an adhesive, and is formed on the ring member. A rim wheel characterized in that a Helmholtz resonator is constituted by at least one hole and the air chamber.   The rim wheel according to claim 5, wherein the metal having the predetermined plate thickness includes a metal foil.   The rim wheel according to claim 5, wherein the metal having the predetermined plate thickness is a shape memory alloy.   The rim wheel according to any one of claims 1 to 7, wherein the ring member or the wheel is provided with a restraining means for restraining displacement of the ring member in the vehicle inside / outside direction with respect to the wheel. At least one hole formed in the ring member by forming an air chamber between the rim outer peripheral surface and the ring member by covering the concave portion formed in the rim outer peripheral surface of the wheel with the ring member along the wheel circumferential direction. In the method of manufacturing a rim wheel having a sound absorption structure, which constitutes a Helmholtz resonator by the air chamber,
The diameter of the ring member is set to be smaller than the diameter of the seat surface of the ring member formed along the circumferential direction on the rim outer peripheral surface of the wheel, and the ring member is configured so that the diameter can be expanded by elastic deformation, A rim wheel having a sound absorbing structure characterized in that when a ring member is attached to a wheel, the diameter of the ring member is enlarged and the ring member is fitted on the outer peripheral surface of the rim of the wheel so that the ring member is brought into close contact with the seat surface. Production method.

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