WO2005023565A1 - タイヤ/ホイール組立体及びランフラット用支持体 - Google Patents
タイヤ/ホイール組立体及びランフラット用支持体 Download PDFInfo
- Publication number
- WO2005023565A1 WO2005023565A1 PCT/JP2004/012812 JP2004012812W WO2005023565A1 WO 2005023565 A1 WO2005023565 A1 WO 2005023565A1 JP 2004012812 W JP2004012812 W JP 2004012812W WO 2005023565 A1 WO2005023565 A1 WO 2005023565A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rim
- elastic ring
- offset
- rigidity
- offset side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
- B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
- B60C17/043—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency made-up of an annular metallic shell
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10009—Emergency
Definitions
- the present invention relates to a tire / wheel assembly and a run flat support, and more particularly to a tire / wheel assembly with improved durability and a run flat support used therefor.
- the support for run flat has an annular shell with an open leg structure in which the outer peripheral side has a support surface having two convex curved surfaces in the width direction and the inner peripheral side is opened, and elastic legs are provided on both legs. It consists of a ring attached and is supported on the rim via its elastic ring. According to this run flat support, the existing wheel can be used as it is without any special modification, so that there is an advantage that the wheel can be accepted without causing any disruption to the market (for example, see Patent Document 1). 1 and 2).
- a commonly used wheel has a configuration in which a rim is fixed to an outer peripheral end of a disc such that a center in a rim width direction is offset to one side (the inside of the vehicle). The space enclosed by the rim and the rim is widened so that the parts mounted on the vehicle can be accommodated in that space.
- Patent Document 1 Japanese Patent Application Laid-Open No. 10-297226
- Patent Document 2 Japanese Special Publication 2001-519279 Noriyuki
- the tire / wheel assembly of the present invention that achieves the above object includes a wheel provided on the outer peripheral end of a disc such that the center of the rim in the width direction is offset to one side, and an air mounted on the rim.
- An annular tire formed in a hollow portion of a pneumatic tire and a supporting surface having a plurality of convexly curved surfaces on an outer peripheral side in a width direction and having an inner peripheral side bifurcated.
- a tire / wheel assembly including an elastic ring that supports a shell and the bifurcated legs on a rim, respectively, and a run-flat support that is powerful, offsets the rigidity of the positive ring that is located on the opposite side to the offset side. It is smaller than the rigidity of the positive ring located on the side.
- the support for run flat of the present invention is mounted on a wheel provided at the outer peripheral end of the disc such that the center of the rim in the rim width direction is offset to one side, and the outer peripheral side has a plurality of convex curved surfaces in the width direction.
- a run-flat support body comprising: an annular shell formed on the support surface having an inner peripheral side and legs formed with legs opened in a bifurcated manner; and elastic rings respectively supporting the bifurcated legs on a rim.
- the rigidity of the elastic ring located on the opposite side to the offset is made smaller than the rigidity of the elastic ring located on the offset side.
- the elastic ring located on the opposite side to the offset side is more easily radiused than the elastic ring located on the offset side.
- the contact pressure between the convex curved surface located on the anti-offset side and the inner surface of the pneumatic tire and the contact pressure between the convex curved surface located on the offset side and the inner surface of the pneumatic tire are offset.
- the difference between the contact pressure and the contact pressure can be made smaller than before.
- the inner surface of the pneumatic tire can be supported by the convex curved surface in a more balanced manner than before, so that the tire portion supported by the convex curved surface located on the opposite side to the offset side is prevented from being broken, and run-flat durability is improved. It becomes possible.
- FIG. 1 shows one embodiment of a tire / wheel assembly of the present invention in a run-flat running state. It is a partial sectional view.
- the run flat support is formed as an annular body inserted into the cavity of the pneumatic tire.
- the run-flat support is formed to be smaller than the diameter of the hollow portion so that the outer diameter keeps a certain distance from the inner surface of the hollow portion of the pneumatic tire, and the inner diameter is equal to the inner diameter of the bead portion of the pneumatic tire. They are formed with substantially the same dimensions.
- the run flat support is rim-assembled with the pneumatic tire in a state of being inserted into the cavity of the pneumatic tire to form a tire / wheel assembly. If this tire / wheel assembly is mounted on a vehicle and the pneumatic tire is punctured while traveling, the punctured and crushed tire will be supported by the outer peripheral surface of the run flat support, and the run flat Enable running.
- the run flat support is mainly composed of an annular shell and an elastic ring.
- the annular shell forms a continuous support surface for supporting a punctured tire on the outer peripheral side, and the inner peripheral side has a bifurcated shape with left and right side walls as legs.
- the support surface on the outer peripheral side is formed so that the shape in a cross section orthogonal to the circumferential direction is convex toward the outer diameter side, and has at least two convex curved surfaces arranged in the width direction.
- the elastic rings are respectively attached to the ends of the bifurcated legs on the inner diameter side of the annular shell, and support the annular shell by abutting on the left and right rim sheets.
- This elastic ring is made of rubber or elastic resin, and reduces shocks and vibrations received by the annular shell from a punctured tire, and prevents slippage on the rim sheet to stably support the annular shell.
- the annular shell is made of a rigid material.
- Metals, resins, and the like are used as the constituent materials. Examples of metals include steel and aluminum.
- the resin may be either a thermoplastic resin or a thermosetting resin. Examples of the thermoplastic resin include nylon and polyester, and examples of the thermosetting resin include epoxy resin and unsaturated polyester resin.
- the resin may be used alone, or may be used as a fiber reinforced resin by mixing reinforcing fibers.
- the elastic ring may be made of rubber or an elastic resin that is capable of stably supporting the annular shell.
- the rubber include natural rubber, isoprene rubber, styrene-butadiene rubber, butadiene rubber, and butyl rubber.
- the elastic resin include foamed resins such as foamed polyurethane.
- run flat support used in the tire / wheel assembly of the present invention is based on the above-described configuration.
- FIG. 1 is a cross-sectional view showing a main part of a tire / wheel assembly according to an embodiment of the present invention, wherein 1 is a wheel, 2 is a pneumatic tire, and 3 is a run flat support.
- the wheel 1 has a configuration in which the annular rim 1A is fixed to the outer peripheral end of the disc 1B so that the center ⁇ in the rim width direction is offset toward the minus side.
- the pneumatic tire 2 is mounted on the rim 1A, and the run flat support 3 is disposed in the cavity 2X of the pneumatic tire 2.
- the wheel 1, the pneumatic tire 2, and the run flat support 3 are formed coaxially in an annular shape around the rotation axis (not shown) of the wheel 1.
- the pneumatic tire 2 includes a carcass layer extending between the left and right bead portions 2B.
- a plurality of belt layers are provided on the outer peripheral side of the carcass layer of the tread portion 2A.
- a bead core is provided on each of the left and right bead portions 2B, and is folded from the inside of the tire to the outside around the S bead core at both ends of the carcass layer.
- the run flat support 3 is composed of an annular shell 4 formed of a rigid material such as a metal or a resin, and left and right elastic rings 5A and 5B also formed of an elastic material such as a rubber or an elastic resin. Have been.
- the annular shell 4 has a support surface 6 having two convex curved surfaces 6a and 6b having substantially the same radius of curvature on the outer peripheral side in the width direction of the annular shell 4, and the support surface 6 is a pneumatic tire.
- 2 is positive Normally, the force is separated from the inner surface 2a of the tread portion 2A of the pneumatic tire 2, and the inner surface 2a of the tread portion 2A of the pneumatic tire 2 that is crushed when punctured is supported.
- both side walls are bifurcated as legs 7a and 7b, and elastic rings 5A and 5B are provided on the inner peripheral side of the legs 7a and 7b, respectively. Installed.
- the elastic rings 5A and 5B have different rigidities on the left and right, and the rigidity of the elastic ring 5A located on the anti-offset side is smaller than the elastic ring 5B located on the offset side according to the offset amount of the rim 1A. I have.
- the elastic ring 5A is made higher (has the same width) as the elastic ring 5B on the offset side, or the ring thickness is increased. The thickness can be reduced by using an elastic material having an elastic modulus lower than that of 5B, or by combining them.
- the height of the elastic ring 5A on the anti-offset side is made higher than the elastic ring 5B on the offset side to reduce the rigidity S, the seating stability on the rim, and the elasticity of the anti-offset side and the offset side. This is good because it makes it easy to identify the rings 5A and 5B.
- the run-flat support body 3 having the elastic rings 5A and 5B thus formed is inserted into the hollow portion 2X of the pneumatic tire 2, and when the rim is assembled, the run-flat support body 3 has an elastic ring.
- 5A and 5B are simultaneously mounted on the rim seats Is and Is of the rim 1A together with the bead portions 2B and 2B of the pneumatic tire 2.
- the inner surface 2a of the tread portion 2A of the pneumatic tire 2 is supported by the biconvex curved surfaces 6a and 6b.
- the tire supporting load acts on the rim 1A.
- the rim 1A becomes greatly radiused on the offset side.
- the contact pressure of the biconvex curved surfaces 6a and 6b against the inner surface 2a of the pneumatic tire 2 becomes higher on the convex curved surface 6a located on the anti-offset side than on the offset curved side.
- the tire portion supported by the offset-side convex curved surface 6a breaks before the tire portion supported by the offset-side convex curved surface 6b It was easy.
- the rigidity of the elastic ring 5A located on the anti-offset side is made smaller than the rigidity of the elastic ring 5B located on the offset side.
- the elastic ring 5A located on the anti-offset side becomes easier to radius than the elastic ring 5B located on the offset side, and thus the radius of the rim 1A on the offset side and the radius of the elastic ring 5A on the opposite offset side during run flat traveling.
- the difference between the contact pressure between the convex curved surface 6a located on the anti-offset side and the inner surface 2a of the pneumatic tire 2 and the contact pressure between the convex curved surface 6b located on the offset side and the inner surface 2a of the pneumatic tire 2 is calculated. It can be smaller than before. As a result, the inner surface 2a of the pneumatic tire 2 can be supported by the convex curved surfaces 6a and 6b in a more balanced manner than before, so that breakage at the tire portion supported by the convex curved surface 6a is suppressed, and the run flat durability is improved. be able to.
- the offset amount between the rigidities Gl and G2 and the rim 1A preferably satisfies the following expression.
- the elastic ring from which the annular shell has been removed is cut out in a length of 10 cm along the ring circumferential direction.
- the leg of the annular shell is attached to the outer peripheral surface of the elastic ring with the inner peripheral end of the embedded leg remaining in the elastic ring. Cut along and remove the annular shell from the elastic ring.
- a radial load W 50 kgf (454N)
- the sample is placed on a horizontal flat test surface with the ring inner peripheral surface facing downward, and a weight of 50 kgf (454N) with a load W of 50 kgf (454N) so as to contact the entire upper surface of the sample is placed on the sample.
- compress the sample compress the sample.
- the radius ⁇ (mm) defined by the amount of compression at this time is measured at room temperature, and the reciprocal value is defined as the rigidity (/ mm) of the elastic ring.
- the offset amount L is a length of a wheel offset defined in a general wheel, and is a distance between the vehicle mounting surface 1B1 at the center of the disc 1B and the center O in the rim width direction of the rim 1A. The distance measured along the tire axis (not shown).
- the difference between the contact pressure of each of the convex curved surfaces 6a and 6b with respect to the inner surface 2a of the pneumatic tire 2 is further reduced, and the contact pressure of each of the convex curved surfaces 6a and 6b is made uniform. Therefore, the inner surface 2a of the pneumatic tire 2 can be supported by the convex curved surfaces 6a and 6b in a more balanced manner, and thus the run flat durability can be further improved.
- the above range is 0.0002 to 0.015.
- the elastic ring 5A on the anti-offset side is set to be 314 mm, preferably 5 to 10 mm higher than the elastic ring 5B on the offset side. Force It is good for making the contact pressure of each convex curved surface 6a, 6b uniform.
- the conditions other than the height of the elastic rings 5A and 5B, that is, the constituent materials and widths of the elastic rings 5A and 5B are the same.
- the rim 1A has an opposite offset. Wheel radius at the rim 1A offset side rim flange If of the rim 1A with respect to the wheel radius radius at the position of the innermost radially outer end lx of the innermost rim flange le of the side rim flange le Assuming that the ratio M2 / M1 of M2 is M, the rigidity Gl (/ mm) of the elastic ring 5A on the anti-offset side and the rigidity G2 (/ mm) of the elastic ring 5B on the offset side described above are expressed as follows in relation to the ratio M. Is preferably satisfied.
- radius amounts Ml and M2 referred to herein are described in JA TMA by assembling a pneumatic tire with a standard rim described in JATMA JATMA YEA R BOOK 2002), filling the rim with an air pressure of 200 kPa, It is the radius measured when a load of 80% of the load capacity corresponding to the air pressure of 200 kPa is applied in the tire radial direction and lateral direction (toward the offset side).
- the radius Ml of the rim 1A on the side opposite to the offset is assumed to be ten when the wheel is radially outward and one when the wheel is radially inward.
- the radius M2 on the offset side of the rim 1A is assumed to be ten when the wheel is radially inward and one when the wheel is radially outward. This is because when the tire Z wheel assembly is turned while a vertical load and lateral force are applied, moment force is generated counterclockwise in the tire / wheel assembly shown in Fig.
- the tires located outside the turning vehicle ie, the tires mounted on the left side of the vehicle in the case of right turn, and the tires mounted on the right side of the vehicle in the case of left turn
- Large lateral force acts toward. Therefore, in the wheel 1 offset as described above, the force to be attached to the vehicle with the offset side being the vehicle side is satisfied by satisfying the above equation (2).
- the difference between the contact pressures of the convex curved surfaces 6a and 6b with respect to the inner surface 2a of the pneumatic tire 2 can be further reduced, and the contact pressures of the convex curved surfaces 6a and 6b can be made uniform.
- the inner surface 2a of the pneumatic tire 2 can be supported in a more balanced manner by the convex curved surfaces 6a and 6b of the annular shell 4 of the support body 3 for run flat, and thus the run flat durability can be further improved. it can.
- the above range is set to 0 ⁇ 01 4-0 ⁇ 100.
- the present invention can be suitably used particularly for a tire / wheel assembly used for a passenger car and a run flat support used therefor.
- the tire Z of the present invention having the configuration shown in Fig. 1 in which the tire size is 205 / 55R16, the rim size is 16 X 6 1 / 2JJ, and the rigidity of the elastic ring on the anti-offset side is smaller than that of the elastic ring on the offset side.
- a wheel assembly (Examples A, B, and C) and a conventional tire / wheel assembly (conventional example) having the same rigidity of both elastic rings were manufactured.
- (G2-G1) / (G1XL) is as shown in Table 1.
- Table 1 shows that the tire Z wheel assembly of the present invention can improve the durability during run flat running.
- Table 2 shows that the tire Z wheel assembly of the present invention can improve the durability during run flat running.
- the tire / wheel assembly of the present invention having the above-described excellent effects can be extremely effectively used as a tire / wheel assembly that is mounted on a vehicle and that enables run-flat running.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112004001566T DE112004001566T5 (de) | 2003-09-04 | 2004-09-03 | Reifen/Radanordnung und Run-flat-Stützelement |
| US10/568,345 US7472734B2 (en) | 2003-09-04 | 2004-09-03 | Tire/wheel assembly and run-flat support member |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-312615 | 2003-09-04 | ||
| JP2003312615A JP4442165B2 (ja) | 2003-09-04 | 2003-09-04 | タイヤ/ホイール組立体及びランフラット用支持体 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005023565A1 true WO2005023565A1 (ja) | 2005-03-17 |
Family
ID=34269743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/012812 Ceased WO2005023565A1 (ja) | 2003-09-04 | 2004-09-03 | タイヤ/ホイール組立体及びランフラット用支持体 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7472734B2 (ja) |
| JP (1) | JP4442165B2 (ja) |
| DE (1) | DE112004001566T5 (ja) |
| WO (1) | WO2005023565A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4492325B2 (ja) * | 2004-12-03 | 2010-06-30 | トヨタ自動車株式会社 | ランフラットタイヤ |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10297226A (ja) * | 1997-02-24 | 1998-11-10 | Continental Ag | 空気タイヤ付き車輪 |
| JP2001519279A (ja) * | 1997-10-15 | 2001-10-23 | コンテイネンタル・アクチエンゲゼルシヤフト | 緊急走行支持体を備えた自動車車輪 |
| JP2004050942A (ja) * | 2002-07-18 | 2004-02-19 | Yokohama Rubber Co Ltd:The | タイヤ/ホイール組立体及びランフラット用支持体 |
| JP2004051003A (ja) * | 2002-07-22 | 2004-02-19 | Yokohama Rubber Co Ltd:The | タイヤ/ホイール組立体及びランフラット用支持体 |
| JP2004175273A (ja) * | 2002-11-28 | 2004-06-24 | Bridgestone Corp | 支持体及び空気入りランフラットタイヤ |
| JP2004175271A (ja) * | 2002-11-28 | 2004-06-24 | Bridgestone Corp | 支持体及び空気入りランフラットタイヤ |
| JP2004175272A (ja) * | 2002-11-28 | 2004-06-24 | Bridgestone Corp | 支持体及び空気入りランフラットタイヤ |
-
2003
- 2003-09-04 JP JP2003312615A patent/JP4442165B2/ja not_active Expired - Fee Related
-
2004
- 2004-09-03 WO PCT/JP2004/012812 patent/WO2005023565A1/ja not_active Ceased
- 2004-09-03 DE DE112004001566T patent/DE112004001566T5/de not_active Withdrawn
- 2004-09-03 US US10/568,345 patent/US7472734B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10297226A (ja) * | 1997-02-24 | 1998-11-10 | Continental Ag | 空気タイヤ付き車輪 |
| JP2001519279A (ja) * | 1997-10-15 | 2001-10-23 | コンテイネンタル・アクチエンゲゼルシヤフト | 緊急走行支持体を備えた自動車車輪 |
| JP2004050942A (ja) * | 2002-07-18 | 2004-02-19 | Yokohama Rubber Co Ltd:The | タイヤ/ホイール組立体及びランフラット用支持体 |
| JP2004051003A (ja) * | 2002-07-22 | 2004-02-19 | Yokohama Rubber Co Ltd:The | タイヤ/ホイール組立体及びランフラット用支持体 |
| JP2004175273A (ja) * | 2002-11-28 | 2004-06-24 | Bridgestone Corp | 支持体及び空気入りランフラットタイヤ |
| JP2004175271A (ja) * | 2002-11-28 | 2004-06-24 | Bridgestone Corp | 支持体及び空気入りランフラットタイヤ |
| JP2004175272A (ja) * | 2002-11-28 | 2004-06-24 | Bridgestone Corp | 支持体及び空気入りランフラットタイヤ |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005081857A (ja) | 2005-03-31 |
| JP4442165B2 (ja) | 2010-03-31 |
| US20060260728A1 (en) | 2006-11-23 |
| US7472734B2 (en) | 2009-01-06 |
| DE112004001566T5 (de) | 2006-07-13 |
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