JP2008143289A - Vehicular wheel, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular wheel having excellent ride quality, and capable of suppressing the vibration to a vehicle while ensuring the high steering stability, reducing the in-cabin noise, allowing defects by welding or the like to hardly occur, and realizing the high productivity and the easy manufacture, and its manufacturing method. <P>SOLUTION: The manufacturing method of the vehicular wheel comprises a strip body forming step of forming a strip body 30 which is provided with a plurality of auxiliary air chamber forming parts 13 having a fluid chamber 7 therein, mainly constituted of a fibrous material, and impregnated with a hardening resin, a fitting step of winding the strip body 30 on a rim outer circumferential surface 4, a filling step of filling a fluid inside the fluid chamber 7 so as to be inflated therein, and a hardening step of hardening the hardening resin after the two steps of the fitting step and the filling step. <P>COPYRIGHT: (C)2008,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 with respect to vehicle interior noise, a secondary air chamber is provided in the rim wheel. A vehicle wheel or the like that operates as a Helmholtz resonance sound absorber by adjusting the size of a communication hole that communicates with an internal main air chamber is disclosed (for example, see Patent Document 1 and Patent Document 2).

  For example, the 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 auxiliary air chambers, a concave well portion that is provided in at least one of the rim or the lid member and whose bottom portion is located radially inward of the bead seat, and communication that communicates with the tire main auxiliary air chamber and the auxiliary air chamber The Helmholtz resonance sound absorber is constituted by the auxiliary air chamber and the communication part.

JP 2002-79802 A JP 2003-326907 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.

  Moreover, the material accompanying deterioration and structural distortion of a structural member arise with the heat | fever accompanying welding. Furthermore, it has been difficult to make the distribution of the welding material uniform, such as an increase in the welding start and end points. It is also necessary to consider the weight increase of the welding material itself. For this reason, there are problems such as a decrease in strength and roundness of the rim wheel and a decrease in sound absorption effect due to a decrease in the accuracy of the volume of the auxiliary air chamber. In order to suppress these problems, it is inevitable that workability deteriorates, production steps increase, and costs increase.

  Further, the rim wheel shown in Patent Document 2 has a sub-air chamber surrounded by a rim, a lid member, and a partition wall, and screws or the like are used as fixing means for the lid member and the partition wall. Therefore, problems such as costs associated with processing and an increase in man-hours during work are inevitable. Furthermore, there is also an effect on strength reduction and tire balance due to the formation of screw holes.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to suppress vibrations to the vehicle while ensuring high steering stability, to achieve a good ride comfort, and to reduce vehicle interior noise. An object of the present invention is to provide a vehicle wheel and a method of manufacturing the vehicle wheel that can achieve high productivity and ease of manufacturing as much as possible.

  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. That is, the present invention is as follows.

[1] A method of manufacturing a vehicle wheel having a plurality of sub air chambers on the outer peripheral surface of a rim, having a plurality of sub air chamber forming portions having fluid chambers therein, and mainly composed of a fibrous material A band-shaped body forming step of forming a band-shaped body impregnated with a curable resin, a mounting step of winding the band-shaped body on the outer peripheral surface of the rim, an injection step of injecting a fluid into the fluid chamber and expanding the fluid chamber; A vehicle wheel manufacturing method comprising: a curing step of curing the curable resin after the two steps of the mounting step and the injection step.

[2] The vehicle according to [1], wherein, in the curing step, the band-shaped body is sandwiched between a rim outer peripheral surface and a mold jig having a shape corresponding to the auxiliary air chamber, and then the curable resin is cured. Wheel manufacturing method.

[3] The method for manufacturing a vehicle wheel according to [1] or [2], wherein the curable resin is a photocurable resin or a thermosetting resin.

[4] The method for manufacturing a vehicle wheel according to any one of [1] to [3], wherein the belt-like body is covered with an impermeable sheet.

[5] A vehicle wheel provided with a plurality of auxiliary air chambers on the rim outer peripheral surface, wherein a plurality of auxiliary air chamber forming portions provided with fluid chambers are impregnated with a curable resin on the rim outer peripheral surface. A vehicle in which the auxiliary air chamber is formed when the curable resin is cured in a state where the fluid chamber is expanded in a ring shape inside a belt-like body mainly composed of a fibrous material wound around Wheel.

[6] The vehicle wheel according to [5], wherein the curable resin is a photocurable resin or a thermosetting resin.

[7] The vehicle wheel according to [5] or [6], wherein the belt-like body is covered with an impermeable sheet.

[8] One or more communication holes communicating with the surface on the tire mounting side are provided in the auxiliary air chamber, and the tire main air chamber and the auxiliary air chamber enable resonance absorption by the communication holes. 7] The vehicle wheel according to any one of [7].

  According to the configuration of [1], the plurality of sub air chamber forming portions are annularly arranged inside a belt-shaped body mainly made of a fibrous material impregnated with a curable resin and wound on the outer peripheral surface of the rim. Since the auxiliary air chamber is obtained by fixing the curable resin by being cured, it can be formed even in the case of a cast-integrated vehicle wheel, not a two-piece type wheel. Since welding and screwing are not necessary, the number of work steps can be reduced, and the problems associated with the above-described welding can be avoided because welding is hardly used.

  Furthermore, the band-shaped body mainly composed of a fibrous material impregnated with a curable resin has a sub air chamber forming portion inside, but is wound around the outer peripheral surface of the rim to be provided inside the sub air chamber forming portion. The secondary air chamber is formed by curing the curable resin in a state in which the fluid is injected into the fluid bag thus inflated. For this reason, even when the rim diameter and the shape of the outer peripheral surface of the rim are different, it can be easily handled by appropriately changing the dimensions of the belt-like body mainly composed of the fibrous material.

  According to the configuration of [2], after the belt-like body is sandwiched between the rim outer peripheral surface and the mold jig having a shape corresponding to the auxiliary air chamber, the fluid is injected into the inside of the fluid chamber to be expanded. Can be easily formed in a desired volume and shape.

  According to the configuration of [3], since a photocurable resin or a thermosetting resin is used, the curing time can be controlled by light or heat. In the case of a photocurable resin, the auxiliary air chamber forming portion 13 is irradiated with light from a light source that cures the curable resin in a state where the fluid bag accommodated in the auxiliary air chamber forming portion is inflated. Can be fixed. Similarly, in the case of a thermosetting resin, the sub-air chamber forming portion can be fixed by heating a cloth-like body impregnated with the thermosetting resin. In this way, it is possible to reduce the work man-hours in the process of fixing the auxiliary air chamber forming part. Furthermore, in the state in which the fluid bag is inflated with a desired volume and shape, the auxiliary air chamber can be formed by removing the fluid after curing the curable resin, and the number of man-hours can be reduced. .

  According to the configuration of [4], since the band is covered with the impermeable sheet, when the band is mounted on the outer peripheral surface of the rim after being impregnated with the resin in [1], the band is cured. The workability is good because the resin is covered with an impermeable sheet.

  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 obtained with high productivity.

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

  1, 2, and 3 are a plan view, a cross-sectional view, and a perspective view, respectively, schematically showing a vehicle wheel manufactured by the manufacturing method of the present invention. The arrow in the figure indicates the wheel axial direction 19. FIG. 4 is a schematic cross-sectional view of the belt-like body. The vehicle wheel according to the present invention is a vehicle wheel 1 having a plurality of auxiliary air chambers 3 on a rim outer peripheral surface 4, and is mainly composed of a fibrous material impregnated with a curable resin as shown in FIG. The belt-like body 30 is wound and fixed on the rim outer peripheral surface 4 as shown in FIGS. 1, 2 and 3. The vehicle wheel of the present invention includes a plurality of auxiliary air chambers 3 as shown in FIGS.

Hereinafter, the manufacturing method of the wheel for vehicles concerning the present invention is explained in detail.
In the band forming step, a band formed mainly of a fibrous material having a plurality of sub air chamber forming portions 13 each having a fluid chamber 7 therein as shown in the schematic sectional view of FIG. 30 is created. The fluid chamber 7 communicates with the outside through the fluid injection hole 9, and the auxiliary air chamber forming portion 13 can be expanded by injecting fluid such as air or water into the fluid chamber through the fluid injection hole 9. The fluid chamber 7 is covered with an inner layer impermeable sheet 41 to prevent the impregnated resin that is separated from the curable resin impregnated layer 40 from leaking into the fluid chamber 7 or touching outside air to be dried and cured. Yes.

  The auxiliary air chamber forming portion 13 can also form the belt-like body 30 by sewing in order to maintain a desired shape. At that time, after the raw material of the outer layer impermeable sheet 42, the curable resin layer 40, and the inner layer impermeable sheet 41 is cut to a desired size, the strip 30 is easily formed by laminating and sewing. Can do.

  The curable resin impregnated layer 40 is mainly made of a fibrous material, is a material that can be impregnated with resin, and is required to have strength. A combination of felt, a glass fiber, a combination of felt resin, or the like can be used as the fibrous material. The curable resin layer is further covered with an outer layer impermeable sheet 42 to prevent the curable resin from leaking to the outside of the auxiliary air chamber forming portion 13 or from being dried and cured by contact with the outside air. The handling of the body 30 is facilitated. Moreover, it can also sew between the some sub air chamber formation parts 13 in order to prevent a shape loss, when the fluid chamber 7 expand | swells.

  When the strip is impregnated with the resin, it is preferably stretched with a roller or the like so that the thickness of the strip and the internal curable resin are uniform. In the present invention, “impregnating” includes applying and injecting a resin, and any resin that penetrates into the curable resin-impregnated layer 40 may be used, and is not particularly limited. In addition, the curable resin can be efficiently impregnated during the formation of the belt-like body. For example, when forming each component of the strip 30 while laminating, the resin can be impregnated at that stage. Alternatively, the belt-like body 30 may be formed by using a curable resin layer 40 impregnated with a resin in advance.

  When a thermosetting resin is used as the curable resin, it is preferable that the thermosetting resin has a long curing time at room temperature and can be cured at a relatively low temperature by heat from a heat source. For example, a main agent such as unsaturated polyester resin or polyalkylene resin and a curing agent such as methyl acetate peroxide can be used. Similarly, the reactivity can be increased by using a catalyst such as cobalt naphthenate in addition to the main agent and the curing agent.

  When a photocurable resin is used as the curable resin, examples include a visible light curable resin, an ultraviolet curable resin, etc., but from the viewpoint of convenience during work, a long usable time when not irradiated, Those having a short curing time upon irradiation are preferred. In addition, a visible light curable material can be diverted from a lamp or the like normally used for illumination in the curing process, and has no influence on the human body.

  In the mounting process, as shown in FIGS. 1, 2 and 3, a belt-like body 30 made of cloth impregnated with a curable resin is wound around the outer peripheral surface 4 of the rim, and the respective bindings at both ends of the belt-like body 30 are wound. The member 43 is annularly fixed on the rim outer peripheral surface 4.

  In the injection step, as shown in FIG. 5, the fluid chamber 7 is filled with fluid and expanded in a state where the mold jig 44 is applied to the auxiliary air chamber forming portion 13 and the belt-like body 30 is sandwiched. The fluid may be a gas such as air or water vapor or a liquid such as room temperature water or hot water.

  The mounting process and the injection process are in no particular order, and either process may be performed first. The curing process needs to be performed after the mounting process and the injection process.

  In the curing step, when the belt-shaped body is cured, if the curable resin is a photo-curable resin, then the fluid chamber is in a state in which the shape is adjusted using the mold jig 44 as shown in FIG. 7 is filled with a fluid such as air or water to increase the internal pressure, and then light is irradiated from the light source 31 to cure the cured resin to fix the sub air chamber forming portion 13 to obtain a sub air chamber.

  Although the curable resin layer 40 is mainly made of a fibrous material, the fluid chamber can be freely shaped, but the rim outer peripheral surface 4 and the formwork jig 44 are wound around the rim outer peripheral surface 4. Therefore, by expanding the fluid chamber 7 by the internal internal pressure, the curable resin layer can be solidified in an arbitrary shape according to the formwork to obtain the auxiliary air chamber 3 having a desired volume and shape. it can. At this time, it is preferable to use a light transmissive one for the mold jig 44. Even when the curable resin is a thermosetting resin, the auxiliary air chamber forming portion 13 can be fixed by curing the thermosetting resin using a heat source in the same manner as described above.

  In addition, when the curable resin is a thermosetting resin, it can be cured by circulating a heated fluid such as water vapor or warm water in the fluid chamber. Further, if the shape of the belt-like body 30 is set to a desired shape in advance, the mold jig 44 is not necessarily required, and the volume of the fluid chamber 7 can be adjusted by the amount of fluid to be injected. It is also possible to cure the strip.

  1, 2, and 3, one or more communication holes 5 are formed in advance at predetermined intervals to form the sub air chamber 3, the tire main air chamber, and the communication holes. 5 is preferably capable of resonance absorption. It is preferable that one or more communication holes 5 be formed in all of the plurality of auxiliary air chambers 3 because the effect of resonance absorption can be further improved. The communication hole 5 can also use a fluid injection hole 9.

  For the purpose of preventing the belt-like body 30 from shifting in the circumferential direction of the wheel, a part of the belt-like body 30 and the rim outer peripheral surface 4 are partially caulked, or a part of the connecting portion 43 is scored so as not to adversely affect the welding. It is also preferred to perform welding.

  In the vehicle wheel of the present embodiment, the material constituting the wheel is not particularly limited. For example, a light alloy can be obtained as a main component because it can obtain the mechanical strength necessary for a vehicle wheel and is lightweight. In particular, it is preferable that the main component is an aluminum alloy or a magnesium alloy.

  As described above, in the vehicle wheel of the present embodiment, the rim wheel 1 and the belt-like body 30 on which the tire is mounted are manufactured separately. Next, the belt-shaped body 30 that has a plurality of sub air chamber forming portions 13, is mainly composed of a fibrous material, is impregnated with a curable resin, and is wound around the outer peripheral surface 4 of the rim, thereby curing the curable resin. It is fixed. As described above, the vehicle wheel including the plurality of auxiliary air chambers 3 on the rim outer peripheral surface 4 can be manufactured by the rim wheel and the belt-like body 30 manufactured separately, so that it is extremely excellent in productivity and mechanical. Since it is excellent in strength and well-balanced, stable running can be realized.

  Further, in the vehicle wheel of the present embodiment, a communication hole 5 communicating with the auxiliary air chamber 3 of FIGS. 1, 2 and 3 is formed, and good resonance is achieved by the auxiliary air chamber 3 and the communication hole 5. In order to obtain the absorption effect, it is preferable that the auxiliary air chamber 3 and the communication hole 5 are configured to satisfy the relationship of the following formula (1).

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

  By configuring the auxiliary air chamber 3 and the communication hole 5 according to the present invention so as to satisfy the relationship of the above-described formula (1), the same level as 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 auxiliary air chambers 3 is two or more and the number of communication holes 5 formed in each auxiliary air chamber 3 is different, the above formula (1 N in) means the average number (pieces) of the communication holes 5 formed in one auxiliary air chamber 3.

  Further, in the vehicle wheel of the present embodiment, in FIG. 1, the total volume of the auxiliary air chamber 3 is 2 to 25 volumes with respect to the volume of the tire main air chamber when the tire is actually mounted on the vehicle wheel. %, Preferably 3 to 15% by volume. If the total volume of the auxiliary air chamber 3 is less than 2% by volume, the effect of improving riding comfort and the effect of resonance absorption may decrease, and if it 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.

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 of this invention. It is sectional drawing which shows the wheel for vehicles of this invention typically. 1 is a perspective view schematically showing a vehicle wheel of the present invention. It is a typical sectional view showing an example of a strip. It is a partial enlarged plan view of a vehicle wheel, schematically illustrating a step of curing a resin. It is a partially expanded sectional view of the wheel for vehicles explaining the process of hardening resin.

Explanation of symbols

1: vehicle wheel, 2: rim, 3: auxiliary air chamber, 4: rim outer peripheral surface, 5: communication hole, 6: disk, 7: fluid chamber, 9: fluid injection hole, 13: auxiliary air chamber forming portion, 19: wheel axial direction, 30: belt-like body, 31: light source, 40: curable resin impregnated layer, 41: inner layer impermeable sheet, 42: outer layer impermeable sheet, 43: coupling member, 44: mold jig .

Claims (8)

A method for manufacturing a vehicle wheel having a plurality of auxiliary air chambers on a rim outer peripheral surface,
A belt-shaped body forming step for forming a belt-shaped body that has a plurality of sub-air chamber forming portions provided with fluid chambers therein and is mainly composed of a fibrous material and impregnated with a curable resin; and A mounting process wound around, an injection process for injecting and expanding a fluid into the fluid chamber, and a curing process for curing the curable resin after the two processes of the mounting process and the injection process. A method for manufacturing a vehicle wheel.   2. The method for manufacturing a vehicle wheel according to claim 1, wherein the curable resin is cured after the belt-like body is sandwiched between a rim outer peripheral surface and a mold jig having a shape corresponding to the auxiliary air chamber in the curing step. .   The method for manufacturing a vehicle wheel according to claim 1, wherein the curable resin is a photocurable resin or a thermosetting resin.   The method for manufacturing a vehicle wheel according to any one of claims 1 to 3, wherein the strip is covered with an impermeable sheet. A vehicle wheel having a plurality of auxiliary air chambers on a rim outer peripheral surface,
A plurality of sub-air chamber forming portions having fluid chambers therein are annularly arranged inside a band-shaped body mainly made of a fibrous material impregnated with a curable resin and wound on the outer peripheral surface of the rim, A vehicle wheel in which the auxiliary air chamber is formed by curing the curable resin in a state where the fluid chamber is expanded.   The vehicle wheel according to claim 5, wherein the curable resin is a photocurable resin or a thermosetting resin.   The vehicle wheel according to claim 5 or 6, wherein the strip is covered with an impermeable sheet.   8. The auxiliary air chamber is provided with one or more communication holes communicating with the surface on the tire mounting side, and the tire main air chamber and the auxiliary air chamber enable resonance absorption by the communication holes. The vehicle wheel according to claim 1.

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