JP2007137393A - Vehicle wheel and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle wheel and its manufacturing method with sufficient riding comfortability capable of suppressing vibration to the vehicle while ensuring high operation stability, accomplishing reduction of in-vehicle noise, hardly generating defect by welding or the like and accomplishing high productivity and easy creation at manufacturing as much as possible. <P>SOLUTION: In the manufacturing method for the vehicle wheel, an inner rim 2 provided with a plurality of partition wall ribs on an outer peripheral surface with a predetermined gap in a circumferential direction, an outer rim 3 and an annular lid member 7 are manufactured in a separate body respectively. The lid member 7 is arranged on the inner rim 2 so as to cover it and the lid member 7 is fixed so as to clamp it by the inner rim 2 and the outer rim 3. Thereby, a plurality of side-air chambers 5 are formed on the outer peripheral surface of the inner rim 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle wheel to which a tire is attached and a manufacturing method thereof, and more specifically, a vehicle capable of suppressing vibration transmitted to the vehicle while ensuring high steering stability, improving riding comfort, reducing vehicle interior noise, and the like. The present invention relates to a vehicle wheel and a method for manufacturing the vehicle wheel that can obtain a vehicle wheel with high productivity, reduce failures due to welding defects, and realize ease of manufacturing during manufacturing.

  2. Description of the Related Art In recent years, automobiles, particularly automobiles regarded as luxury cars, are required to have both handling stability and comfort in the interior of the vehicle. For this reason, in tires, vehicle wheels, suspensions, and so on, which are so-called undercarriages, for example, active control techniques for suspensions, anti-vibration rubbers, and tire structure improvement techniques have been developed.

  Various improvements have also been made with respect to vehicle wheels. For example, in order to suppress tire cavity resonance noise, which is a major factor against in-vehicle noise, a secondary air chamber is provided in the rim wheel and communicated with the secondary air chamber. A vehicle wheel or the like that acts as a Helmholtz resonance sound absorber by adjusting the size of the hole is disclosed (see, for example, Patent Document 1).

For example, a rim wheel shown in Patent Document 1 is formed between a rim and a plurality of lid members arranged on the outer side in the radial direction of the rim, and is divided by a plurality of partition walls provided at intervals in the circumferential direction. A plurality of sub air chambers, a concave well portion provided at least in one of the rim or the lid member and having a bottom portion located radially inward of the bead seat, a tire main sub air chamber, and the sub air chamber And a communication part that communicates with the auxiliary air chamber. The auxiliary air chamber and the communication part constitute a Helmholtz resonance sound absorber.
JP 2002-79802 A

  However, in the rim wheel shown in Patent Document 1, the lid member and the partition wall constituting the auxiliary air chamber are joined by welding or the like, and the mechanical strength that can withstand vibration during driving of the automobile at this joined portion. There was a problem that it was difficult to ensure. In addition, in order to obtain a sufficient resonance sound absorption effect when joining the lid member and the partition wall by welding or the like, it is necessary to ensure the airtightness of the auxiliary air chamber, and an extremely advanced welding technique is required. In addition, there is a problem that it is difficult to industrially manufacture the rim wheel shown in Patent Document 1.

  The object of the present invention has been made in view of the above-mentioned problems, suppresses vibrations to the vehicle while ensuring high steering stability, has a good ride comfort, can achieve reduction of in-vehicle noise, and can be achieved by welding or the like. It is an object of the present invention to provide a vehicle wheel and a method for manufacturing the vehicle wheel that are less likely to cause defects and that realize high productivity and ease of manufacturing at the time of manufacture.

  As a result of intensive studies in order to solve the above-mentioned problems, the present inventor has found that the above-described problems can be achieved by adopting the following configuration, and has completed the present invention.

  According to the present invention, the inner rim, the outer rim, and the annular member are manufactured separately, and the inner rim and / or the outer rim is disposed and fixed so as to cover the outer peripheral surface of the inner rim and / or the outer rim. A plurality of ribs for partition walls are provided at predetermined intervals in the circumferential direction on the outer peripheral surface of the inner rim and / or outer rim or on the inner peripheral surface of the annular member. A vehicle wheel manufacturing method for forming a plurality of auxiliary air chambers on the outer peripheral surface of the vehicle is provided.

  In the present invention, the annular member is preferably an annular lid member or a member formed in an annular shape by arranging a plurality of box-shaped members in the circumferential direction.

In the above manufacturing method, it is preferable to fix the annular lid member so as to be sandwiched between the inner rim and the outer rim, and one or more communication holes are formed in the annular member to communicate with the surface on the tire mounting side. It is preferable to allow resonance absorption by the auxiliary air chamber and the communication hole.
In the above, it is preferable that the box-shaped member has an open bottom, and it is preferable to provide a plurality of communication holes in the box-shaped member.

Further, in the present invention, the inner rim and the outer rim are each configured separately, and a plurality of box-shaped members configured separately are arranged and fixed on the outer peripheral surface of the inner rim, There is provided a vehicle wheel in which a plurality of auxiliary air chambers are formed on an outer peripheral surface of an inner rim.
In the vehicle wheel described above, the box-shaped member preferably has an opening at the bottom.

  According to the present invention, a vehicle wheel that can suppress vibrations transmitted to a vehicle while ensuring high steering stability, improve ride comfort, reduce vehicle interior noise, etc., and reduce failures due to welding defects and the like. It can be manufactured with high productivity.

  Hereinafter, the production method of the present invention will be described based on the embodiments with reference to the drawings. However, the present invention is not construed as being limited thereto, and unless it departs from the scope of the present invention. Various changes, modifications and improvements can be made based on the knowledge of those skilled in the art.

  In the method for manufacturing a vehicle wheel according to the present invention, the inner rim, the outer rim, and the annular member are manufactured separately, and are arranged and fixed so as to cover the outer peripheral surface of the inner rim and / or the outer rim. By doing so, a plurality of auxiliary air chambers are formed on the outer peripheral surface of the inner rim and / or the outer rim. The plurality of ribs for partition walls are provided on the outer peripheral surface of the inner rim and / or outer rim, or provided on the inner peripheral surface of the annular member, so that the outer periphery of the inner rim and / or outer rim as described above. A plurality of auxiliary air chambers are formed on the surface.

[First embodiment]
FIG. 1 is a plan view schematically showing a vehicle wheel manufactured by the manufacturing method (first embodiment) of the present invention. 2 is an enlarged cross-sectional view of the rim peripheral portion of the vehicle wheel shown in FIG. 1, and FIG. 3 is a perspective view showing an embodiment of the inner rim.

  In the vehicle wheel manufacturing method according to an embodiment of the present invention, first, as shown in FIGS. 2 and 3, a plurality of partition ribs 4 are provided on the outer peripheral surface at predetermined intervals in the circumferential direction. Together with the inner rim 2, the outer rim 3 and the annular lid member 7 are manufactured separately. Next, the inner rim 2 is disposed so as to cover the annular lid member 7, and the annular lid member 7 is fixed so as to be sandwiched between the inner rim 2 and the outer rim 3. Thus, a plurality of auxiliary air chambers 5 can be formed on the outer peripheral surface of the inner rim 2 in the circumferential direction.

  As shown in FIG. 3, the inner rim 2 is formed in a cylindrical shape, and a plurality of partition ribs 4 are arranged at predetermined intervals in the circumferential direction on the outer peripheral surface. Yes. The partition ribs 4 disposed on the inner rim 2 are integrally cast on the inner rim 2 or a plurality of aluminum plate-like ribs are manufactured individually. When the partition rib 4 is manufactured separately from the inner rim 2, the partition rib 4 is then fixed to the inner rim 2 by welding or the like.

  The inner rib 2 having the rib 4 for the partition wall provided on the outer peripheral surface thereof is disposed so as to cover the annular lid member 7 manufactured separately separately, and the outer rim side end of the annular lid member 7 is also provided. The edge (circumferential edge) 7a is connected to the edge (circumferential edge) 2a on the outer rim side of the inner rim 2 and the end on the inner rim side of the outer rim 3 made separately in advance. A plurality of hollow auxiliary air chambers 5 are formed on the outer peripheral surface of the inner rim 2 by being fixed with screws 9 or the like so as to be sandwiched between the edge portions (circumferential end edge portions) 3a. On the other hand, the end portion 7b on the inner rim side of the annular lid member 7 is fixed to a predetermined location on the tire mounting surface of the inner rim 2 by welding, an adhesive, or caulking.

  Next, the rim member (composite member composed of the inner rim 2 and the outer rim 3) having a plurality of auxiliary air chambers 5 manufactured by the above method is fitted into the disk 8 produced by a technique such as aluminum casting or forging, As shown in FIG. 2, the vehicle wheel 1 of the present invention can be manufactured by fixing with a fixing means such as a screw 9.

  One or more communication holes 6 are formed in the annular lid member 7 at a predetermined interval in the circumferential direction, that is, between the adjacent partition ribs 4 formed in the inner rim 2. It is preferable that resonance absorption is possible by the air chamber 5 and the communication hole 6.

It is preferable that one or more communication holes 6 be formed in all the plurality of auxiliary air chambers 5 because the effect of resonance absorption can be further improved.
In the above embodiment, a plurality of partition ribs are arranged at predetermined intervals in the circumferential direction on the outer circumferential surface of the inner rim, but in the circumferential direction on the outer circumferential surface of the outer rim. A plurality of partition ribs may be arranged at a predetermined interval, or a plurality of partition ribs may be arranged at a predetermined interval in the circumferential direction on the inner peripheral surface of the annular lid member.

  In the vehicle wheel of the present embodiment, there is no particular limitation on the material constituting the inner rim 2, the outer rim 3 and the disk 8, but for example, the mechanical strength necessary for a vehicle wheel can be obtained and the weight is light. For this reason, it is preferable to use a resin, rubber, or metal. As a metal, it is preferable to have a light alloy as a main component, and specifically, it is preferable to have an aluminum alloy or a magnesium alloy as a main component.

  As mentioned above, although one Embodiment of the manufacturing method of the wheel for vehicles has been described based on FIG.2 and FIG.3, the effect is demonstrated next.

As described above, the vehicle wheel according to the present embodiment is a so-called “two-piece type” vehicle wheel, and the rim (inner rim 2 and outer rim 3) on which tires are mounted and the annular lid member 7 are separately provided. A hollow auxiliary air chamber 5 is formed inside the rim by manufacturing the body and sandwiching and fixing the annular lid member 7 between the edge portions of the inner rim 2 and the outer rim 3. As described above, the vehicle wheel having the hollow auxiliary air chamber 5 disposed inside the rim can be manufactured by the inner rim 2, the outer rim 3 and the annular lid member 7 which are manufactured separately, so that it is extremely productive. In addition to being excellent in performance, it has excellent mechanical strength and good balance, so that stable running can be realized.
In the above embodiment, the inner rim 2 is disposed so as to cover the annular lid member 7, but the outer rim 3 may be disposed so as to cover the annular lid member 7. You may arrange | position so that the cyclic | annular cover member 7 may be covered over the rim 2 and the outer rim 3.

  Furthermore, in the vehicle wheel of the present embodiment, a communication hole 6 communicating with the auxiliary air chamber 5 is formed, and in order to obtain a good resonance absorption effect by the auxiliary air chamber 5 and the communication hole 6, It is preferable that the auxiliary air chamber 5 and the communication hole 6 are configured to satisfy the relationship of the following formula (1).

(Where V is the total volume (cm ³ ) of the sub-air chamber 5, S is the total cross-sectional area (cm ² ) of the communication hole 6, L is the length (cm) of the communication hole 6, and N is the one sub-chamber. (The number of communication holes 6 drilled in the air chamber 5 (pieces), and C indicates the speed of sound (cm / sec))

  By configuring the auxiliary air chamber 5 and the communication hole 6 according to the present invention so as to satisfy the relationship of the above formula (1), it is similar to the cavity resonance sound of the tire mounted on the vehicle wheel of the present embodiment. The resonance frequency can be set so as to be the same, and the cavity resonance sound of the tire can be reduced. In the vehicle wheel of the present embodiment, when the number of sub air chambers 5 is two or more and the number of communication holes 6 formed in each sub air chamber 5 is different, the above formula (1 N in) means the average number (pieces) of the communication holes 6 formed in one auxiliary air chamber 5.

  Further, in the vehicle wheel of the present embodiment, the total volume of the auxiliary air chamber 5 provided by the inner rim and the lid member is such that the tire is attached to the tire when the tire is actually attached to the vehicle wheel. The volume of the space formed by the side surface 9 is preferably 2 to 25% by volume, and more preferably 3 to 15% by volume. If the total volume of the auxiliary air chamber 5 is less than 2% by volume, the effect of improving riding comfort and the effect of resonance absorption may decrease. If the total volume exceeds 25% by volume, the above-described resonance absorption is reduced. In the case of performing, the spring constant may be lowered with respect to the low frequency, and the attenuation may be reduced.

[Second Embodiment]
Next, a vehicle wheel manufacturing method (second embodiment) according to the present invention and a vehicle wheel manufactured by the method will be described with reference to FIGS. 4, 5, and 6.

The configuration of the vehicle wheel manufactured in the second embodiment is basically the same as that in FIG. 1, and the different part is a connection part of the box-shaped member 12 as shown in FIG. 6. That is, in this vehicle wheel, the inner rim 10 and the outer rim 11 are configured separately, and the inner rim 10 and the outer rim 11 are joined and fixed by welding 16a, 16b, etc. A plurality of box-shaped members 12 each having an open bottom surface, which are separately formed, are disposed and fixed on the outer peripheral surface to form a plurality of auxiliary air chambers 15 on the outer peripheral surface of the inner rim 10. It is. In FIG. 6, adjacent box-shaped members 12 are connected in series, but a plurality of box-shaped members 12 may be disposed and fixed at intervals.
In this embodiment, the box-shaped member 12 has a shape in which the bottom surface is opened. However, the present invention is not limited to this, and for example, a completely sealed type in which the bottom surface is not opened can also be used. .

Next, the manufacturing method of the vehicle wheel which is 2nd embodiment is demonstrated.
First, the inner rim 10 and the outer rim 11 are manufactured separately, and the box-shaped member 12 whose bottom surface is opened is manufactured separately in advance. Next, a plurality of box-shaped members 12 are arranged in the circumferential direction to form an annular shape, and then fixed on the outer peripheral surface of the inner rim 10 so that the opening surface 12a faces the inner rim 10 side. By arranging a plurality of box-shaped members 12 in the circumferential direction so as to form an annular shape on the outer peripheral surface of the inner rim 10, a plurality of auxiliary air chambers are formed on the outer peripheral surface of the inner rim 10. 15 can be formed.
Hereinafter, each step will be described in order.

  First, the inner rim 10 and the outer rim 11 of a vehicle wheel having a disk cylinder shape are manufactured separately from an aluminum alloy or the like in advance.

  On the outer peripheral surface of the inner rim 10 manufactured as described above, for example, four pieces of box-shaped members 12 having a bottom surface opened as shown in FIG. The sub-chamber 15 is formed by arranging and forming an annular shape and fixing it by means such as welding.

  The adjacent box-shaped members 12 arranged on the outer peripheral surface of the inner rim 10 are filled with an adhesive 14 as shown in FIG. The box-shaped member 12 has one or more communication holes 13, and can absorb resonance by the auxiliary air chamber 15 and the communication holes 13 as described in the first embodiment. It is preferable that

  According to the method for manufacturing a vehicle wheel according to the present invention, the vehicle wheel can be manufactured with good workability, simply, and with high accuracy, and the obtained vehicle wheel has excellent mechanical strength and is stable. Can be achieved. Therefore, it is extremely useful industrially as a method for manufacturing a vehicle wheel.

It is a top view which shows typically the wheel for vehicles manufactured by the manufacturing method (1st embodiment) of this invention. It is sectional drawing to which the rim periphery part of the vehicle wheel shown in FIG. 1 was expanded. It is a perspective view which shows one Example of an inner rim | limb. It is sectional drawing to which the rim periphery part of the wheel for vehicles manufactured by the manufacturing method (2nd embodiment) of this invention was expanded. It is a perspective view which shows an example of a box-shaped member. It is explanatory drawing which shows the state which filled the box-shaped member adjacent to the edge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle wheel, 2 ... Inner rim, 2a ... Outer rim side edge (circumferential edge) of inner rim, 3 ... Outer rim, 3a ... Outer rim side edge (round) (Circumferential edge), 4 ... rib for partition, 5 ... sub-air chamber, 6 ... communication hole, 7 ... annular lid member, 7a ... edge on the outer rim side (circumferential edge) of the annular lid member, 7b: End portion on the inner rim side of the annular lid member, 8 ... Disk, 9 ... Screw, 10 ... Inner rim, 11 ... Outer rim, 12 ... Box-shaped member, 13 ... Communication hole, 14 ... Adhesive, 15 ... Secondary air chamber, 16a, 16b ... welding.

Claims (7)

In manufacturing the inner rim, the outer rim and the annular member separately, and arranging and fixing the annular member on the outer peripheral surface of the inner rim and / or the outer rim,
By providing a plurality of partition ribs at predetermined intervals in the circumferential direction on the outer peripheral surface of the inner rim and / or outer rim or on the inner peripheral surface of the annular member, the inner rim and / or the outer rim A method for manufacturing a vehicle wheel, wherein a plurality of auxiliary air chambers are formed on an outer peripheral surface.   The method for manufacturing a vehicle wheel according to claim 1, wherein the annular member is a member formed by annularly arranging a plurality of annular lid members or box-shaped members in the circumferential direction.   The vehicle wheel manufacturing method according to claim 2, wherein the annular lid member is fixed so as to be sandwiched between the inner rim and the outer rim.   The vehicle wheel according to claim 1 or 2, wherein one or more communication holes communicating with the surface on the tire mounting side are formed in the annular member, and resonance absorption is enabled by the auxiliary air chamber and the communication hole. Manufacturing method.   The method for manufacturing a vehicle wheel according to claim 2, wherein the box-shaped member has an open bottom surface.   Each of the inner rim and the outer rim is configured separately, and a plurality of box-shaped members configured separately are arranged and fixed on the outer peripheral surface of the inner rim, and the outer rim of the inner rim is fixed on the outer peripheral surface of the inner rim. A vehicle wheel in which a plurality of auxiliary air chambers are formed.   The vehicle wheel according to claim 6, wherein the box-shaped member has a bottom opening.

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