JP2005271808A - Core for run flat of wheel, and supporting structure thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the construction wherein an occupant can notice run-flat when the run flat occurs. <P>SOLUTION: A core 30 for run flat has a base plate 32 which is wound around a rim in a form of one strip having the length corresponding to the circumferential length of the rim of a wheel 20, and a core body 31 which is provided on the base plate 32 to receive the load during the run flat. While the base plate 32 is wound around the rim, a gap 30b between both edges of the core is formed between one winding end and the other winding end of the core body 31 so that only vibration or abnormal noise is generated during the run flat. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a so-called run-flat core provided on a wheel of a vehicle and a support structure thereof.

A run-flat core that is capable of traveling to a certain extent even when the tire has a reduced internal pressure due to puncture or the like is well known. For example, as described in Patent Documents 1 and 2, this type of core is generally composed of a plurality of arc-shaped members, and these arc-shaped members are connected so as to surround the rim of the wheel to form a complete ring shape as a whole. On the other hand, if this type of core is installed, the occupant may not notice it even if it is punctured. Therefore, in the above-described patent document, a concave portion (Reference 1) or a convex portion (Reference 2) is provided on the outer peripheral surface of the core, and at the time of run flat such as puncture, the concave portion or the convex portion comes down. In order to let the passengers vibrate and inform the passengers. A vehicle is also known in which the internal pressure of a tire is detected by a sensor.
JP-A-2-246811 JP-A-5-65004

  In the above-described patent document, it is necessary to form a concave portion or a convex portion on the core itself, which complicates the manufacturing and increases the cost. Providing the internal pressure sensor is more costly.

In order to solve the above problems, the present invention provides a run-flat core provided on a rim of a wheel, the rim having a single belt shape having a length corresponding to the circumference of the rim. A base plate that is wound around the base plate, and a core body that is provided on the base plate and receives a load during run-flat, and in the state where the base plate is wound around the rim, one winding end of the core body and the other A gap between both ends of the core is formed between the winding ends so that vibration or abnormal noise is generated during run-flat.
According to this feature configuration, during run-flat, vibration and noise occur every time the gap between both ends of the core comes to the lower side, so that the occupant is sure that the tire has suffered a decrease in internal pressure such as puncture. This eliminates the need for a tire internal pressure sensor. The core end gap is naturally formed when the core is wound around the rim of the wheel. Therefore, it is not necessary to positively provide a run-flat notification means like the convex part of the above-mentioned patent document 1 in the core itself at the time of manufacture of the core. Accordingly, it is possible to avoid complication of manufacturing and suppress an increase in manufacturing cost.

Here, it is preferable that the core body is divided into a plurality of parts in the extending direction of the base plate, and the plurality of divided core bodies are connected by the base plate. According to this configuration, the core can be rounded down to be small. In this state, the tire can be easily inserted into and removed from the tire via the inside of the tire bead.
In this case, it is desirable that a gap between the split core bodies that is sufficiently narrower than the gap at both ends of the core is formed between the adjacent split core bodies. As a result, the core can be easily rounded into a spiral shape, and insertion and removal operations into and from the tire can be reliably simplified. In addition, since the gap between the split core bodies is sufficiently narrow, vibrations and abnormal noise can be prevented even if they come down during run-flat, and only when the gap at both ends of the core comes down. Vibration and noise can be generated.

It is desirable to provide connecting means for connecting these end portions between both end portions of the base plate. As a result, the core can be reliably wound around the rim.
The core body and the base plate may be formed of different members and bonded together, or may be formed integrally with each other.

  The core is wound around the outer peripheral surface of the rim portion of the rim, and the base plate has an extending portion that extends into an annular drop groove defined by the sidewall portion and the drop portion of the rim. Preferably, a belt-like body is wound around the drop groove in a tensioned state, and the extension portion of the core is pressed against the inner surface of the drop groove by the belt-like body. As a result, it is possible to prevent or suppress the core from shifting in the circumferential direction with respect to the rim during the run-flat, and sufficiently ensure the braking effectiveness.

  According to the present invention, at the time of run-flat, vibration and noise are generated each time the gap between the both ends of the core comes downward, thereby ensuring that the occupant has reduced the internal pressure of the tire such as puncture. I can know. The core end gap is naturally formed when the core is wound around the rim of the wheel. Therefore, there is no need to actively provide run-flat notification means such as the concave portions and convex portions of Patent Documents 1 and 2 listed above in the core itself when the core is manufactured. Therefore, the complexity of manufacturing can be avoided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show the first embodiment. In FIG. 1 and FIG. 2, the code | symbol 10 is a tire of a vehicle and the code | symbol 20 is a wheel. The wheel 20 is a two-piece type wheel, for example, and includes a disk 21 and a drop center rim 22 welded to the outer periphery of the disk 21. Instead of the two-piece type, a one-piece type wheel in which the disc 21 and the rim 22 are integrally formed may be used. The rim 22 includes a pair of flange portions 23A and 23B provided on both peripheral edges in the axial direction, a pair of bead seat portions 24A and 24B connected to the inner sides in the axial direction of the flange portions 23A and 23B, and a drop in the intermediate portion in the axial direction. Part 25. The end surfaces of the beads 11A and 11B of the tire 10 are respectively applied to the bead seat portions 24A and 24B, and the beads 11A and 11B are pressed to the flange portions 23A and 23B, respectively.

  A pair of side wall portions 26A and 26B that expand in a steep tapered shape are provided on both peripheral edges of the drop portion 25, and an annular drop groove 20a is formed by the drop portion 25 and the pair of side wall portions 26A and 26B. Is formed. A ledge portion 27 having a substantially straight cylindrical shape is provided between the sidewall portion 26A on one side and the bead sheet portion 24A. A hole 20b for fitting an air filling valve (not shown) is formed in the opposite side wall portion 26B.

A run-flat core 30 is provided on the outer peripheral surface of the ledge portion 27 of the wheel 20.
As shown in FIGS. 1 to 4, the core 30 includes a core body 31 that receives a load during run-flat, and a base plate 32 provided on the inner peripheral side of the core body 31. It is in the form of a strip of a book and is formed into a ring by being wound around the rim 22. As shown in FIG. 2 and FIG. 3A, the core body 31 is composed of divided core bodies 35 that are divided into a plurality of parts (for example, 10 to 12 parts) in the circumferential direction. Each divided core body 35 is formed in a block shape with, for example, a hard resin (or metal). Lubricating oil is applied to the upper surface (outer peripheral surface) of the split core body 35. As a result, even if the tire 10 is punctured and rubbed against the split core body 35, smoke and dust are not generated so much. The bottom surface (inner peripheral surface) of the split core body 35 is fixed to the base plate 32 by adhesion or the like. A narrow gap 30a between the split core bodies is formed between adjacent core bodies 35, 35,... Connected by the base plate 32.

  The base plate 32 is formed in a band plate shape with a soft resin such as a flexible elastomer. As shown in FIGS. 2 and 3A, the belt-like base plate 32 is wound around the outer peripheral surface of the ledge portion 27 of the wheel 20 to form an annular shape. The length of the base plate 32 is slightly shorter than the circumferential length of the ledge portion 27 of the wheel 20. Accordingly, one winding end of the base plate 32 and the other winding end are slightly separated from each other. As shown schematically in FIG. 2, a core both-end coupling means 34 is bridged between both winding ends of the base plate 32. Although detailed illustration is omitted, the core both-end coupling means 34 includes a hook provided at one of both winding ends of the base plate 32 and a hook engaging portion provided at the other. By means of this connecting means 34, both winding ends of the base plate 32 are temporarily connected to each other. The connecting means 34, that is, both end connecting portions of the base plate 32 are arranged at substantially the same circumferential position as the position of the valve hole 20b.

  As shown in FIGS. 2 and 3A, in the state where the base plate 32 and the core 30 are annularly wound around the ledge portion 27 of the wheel 20, the split core body 35 on one winding end side and the other winding are wound. The split core bodies 35 on the end side are relatively far apart. As a result, a core end gap 30b wider than the split core body gap 30a is formed between one winding end of the core body 31 and the other winding end. The size L of the core end gap 30b is, for example, L = 50 to 60 mm, but may be 40 to 50 mm, or 30 to 40 mm.

The wheel 20 is provided with a support structure that fixedly supports the core 30 on the rim 22.
Specifically, as shown in FIG. 2, an extending portion 33 extending from the core body 31 is provided on one side edge of the base plate 32 in the width direction. The extending portion 33 is bent radially inward, enters the drop groove 20a of the wheel 20, and is attached to the sidewall portion 26A (the inner surface of the drop groove 20a).

  As shown in FIGS. 1 and 2, a band 40 (band-like body) is attached to the wheel 20 as a support member that fixedly supports the core 30. The band 40 is made of a metal such as steel (resin that can satisfy the above performance) having flexibility that can be wound around the wheel 20 and rigidity that can fix the core 30. The band 40 is substantially equal to the opening width of the drop groove 20a and has a length slightly shorter than the circumferential length of the drop groove 20a. As shown in FIG. 1, the edges on both sides in the width direction of the band 40 are bent downward to form a pair of inclined wall portions 42A, 42B. These inclined wall portions 42A and 42B are inclined so as to approach each other downward. The inclination angles of the inclined wall portions 42A and 42B are substantially the same as the taper angles of the sidewall portions 26A and 26B.

  As shown in FIGS. 1 and 2, the band 40 is wound slightly less than one turn along the drop groove 20 a so as to close the opening of the drop groove 20 a of the wheel 20. In this state, one inclined wall portion 42A is addressed to the extending portion 33 of the core 30 covering the sidewall portion 26A. As a result, the extending portion 33 is sandwiched between the inclined wall portion 42A and the sidewall portion 26A. The other inclined wall portion 42B is addressed to the sidewall portion 26B.

As shown in FIGS. 2 and 5, both ends of the band 40 are separated from each other by the length of the band 40 shorter than the circumferential length of the drop groove 20a. Between both ends of the band 40, connecting means 50 for connecting them to each other is provided. The connecting means 50 has a screw locking portion 51 provided at one end of the band 40, a female screw hole 52 provided at the other end, and a screw 53. The screw 53 is locked to the locking portion 51 and is strongly screwed into the female screw hole 52. As a result, both end portions of the band 40 are connected and pulled toward each other. As a result, the band 40 is tensioned, the inclined wall portion 42 </ b> A is strongly pressed against the extension portion 33 of the core 30, and as a result, the core 30 is fixedly supported by the wheel 20.
The connecting means 50 is arranged at a position in the circumferential direction that is substantially the same as the position of the valve hole 20b.

A procedure for mounting the core 30 and the tire 10 on the wheel 20 will be described.
First, the bead 11 </ b> A on one side of the tire 10 is fitted into the rim 22 using the drop groove 20 a of the wheel 20.
Next, the core 30 is put into the tire 10 from the other bead 11B side. At this time, since both ends of the core 30 are separated and the core main body 31 is divided at every short interval and a gap 30a is formed between them, the core 30 is rolled up into a spiral shape to be small. Can do. The small and rounded core 20 is inserted into the tire 10 through the opening inside the bead 11 </ b> B, and is temporarily arranged at one place on the outer periphery of the rim 22. Thereafter, one end of the core 20 is brought around the hole 20b for the air-filling valve, and the other end is drawn around in the circumferential direction of the rim 22 to expand the core 20. Thus, the core 30 can be wound around the outer peripheral surface of the ledge portion 27 of the rim 22 and both ends thereof can be positioned near the air valve hole 20b. The extending portion 33 of the core 30 is attached to the sidewall portion 26A. Then, one end and the other end of the base plate 32 are temporarily fixed by the connecting means 34. When the core 30 is wound around the rim 22 in this way, a core both-ends gap 30b is naturally formed between one winding end and the other winding end. Therefore, when the core 30 is manufactured, there is no need to actively provide run-flat notification means such as the concave portions and convex portions of Patent Documents 1 and 2 listed above on the core itself. Therefore, manufacturing can be simplified and manufacturing cost can be suppressed.

Next, the tire bead 11B is fitted to the rim 22 using the drop groove 20a. The bead 11B is pushed toward the core 30 to wind the band 30 around the drop groove 20a while exposing the drop groove 20a. At this time, the gap between both end portions of the band 30 is set to be exactly at the position of the valve hole 20b. Then, both ends of the band 30 are coupled with the screws 53 and tightened strongly. As a result, the band 40 is tensed to reduce the diameter and try to enter deeply into the drop groove 20a. Therefore, the inclined wall portion 42A that forms the taper of the band 40 is strongly pressed against the core extending portion 33 that follows the tapered side wall portion 26A. The core 30 can be fixed to the wheel 20 by this pressing force. In addition, since the inclined wall portion 42A is pressed with a surface substantially over the entire region of the core extending portion 33, the fixing force to the core 30 can be reliably exerted. The necessary tool is only a screw turn for the screw 53, and no special tool or high-level skill is required, and the work can be simplified.
Thereafter, air is introduced into the tire 10 from the valve fitted in the valve hole 20b.
The rim 22 is a drop center type rim, and the tire beads 11A and 11B can be fitted using the drop groove 20a. Therefore, there is no problem of air leakage in the two-piece type rim. O-ring mounting is not necessary.

  As shown in the phantom line of FIG. 3A and FIG. 3B, even when the internal pressure of the tire 10 decreases due to puncture or the like when the vehicle travels, the ground contact portion of the tire 10 hits the core 30 and is supported. It is possible to prevent the vehicle from becoming unable to run. At this time, since the core 30 is fixed to the wheel 20 by the band 30 so as not to be displaced, a sufficient braking force can be secured. On the other hand, since the lubricating oil is applied to the outer peripheral surface of the core body 31, it is possible to suppress the generation of smoke and dust even when sliding with the ground contact portion of the tire 10 occurs.

  As shown by the phantom line in FIG. 3A, the gap 30a formed in the middle of the core 30 is narrow, so that even if it comes down and corresponds to the ground contact portion of the tire 10, it vibrates. Almost no abnormal noise is generated. On the other hand, as shown in FIG. 3 (b), the gap 30b between the both end portions of the core 30 is relatively wide, so that vibration and abnormal noise are generated each time the gap 30b comes to the lower side. As a result, the occupant can surely know that the tire 10 has experienced a decrease in internal pressure such as puncture, and can take appropriate measures. Therefore, the internal pressure sensor of the tire 10 becomes unnecessary, and the cost can be reduced.

  Further, since the drop groove 20a is blocked by the band 40, the tire bead 11B does not fall there. Therefore, the tire 10 can be prevented from being detached from the wheel 20, and safety can be improved.

Next, a procedure for removing the tire 10 will be described.
First, the core of the air vent valve is removed, and the air pressure in the tire 10 is released.
Next, the circumferential direction part corresponding to the air vent valve in the tire bead 11B is pushed. Thereby, the periphery of the screw 53 of the band 40 and the both end connecting means 34 of the core 30 can be exposed using the air vent valve as a mark. The screw 53 is loosened and removed, and both ends of the band 40 are separated. Thereby, the band 40 can be taken out from the drop groove 20a. Further, the connecting means 34 is released, and both ends of the core 30 are separated. Then, the entire circumference of the bead 11B is released from the rim 22 using the drop groove 20a. The band 40 and the core 30 are taken out from the inside of the released bead 11B. The releasing operation of the connecting means 34 may be performed after the releasing operation of the bead 11B. Then, the remaining tire beads 11A are removed from the rim 22 using the drop grooves 20a.

6 to 9 show a second embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
As shown in FIG. 6, in the core 30X of the second embodiment, the core body 31 and the base plate 32 are integrally formed of resin. As shown in FIGS. 6 and 7, the extending portion 33 of the base plate 32 into the drop groove 20a includes a first extending portion 33a that extends not only to the sidewall portion 26A but also to the drop portion 25, and this first extending portion. It has a claw-like second extending portion 33b disposed radially outward from the protruding portion 33a. As shown in FIGS. 7 and 8, the first extending portions 33 a and the second extending portions 33 b are alternately arranged in the circumferential direction, that is, the extending direction of the base plate 32. The first extending portion 33a has a larger width along the circumferential direction than the second extending portion 33b.

  The metal band 40X (strip-shaped body) of the second embodiment does not have the inclined wall portions 42A and 42B, and is flat. The band 40X is passed between the first extension portion 33a and the second extension portion 33b. Accordingly, when the core 30X and the band 40X are attached to the wheel 20, before the core 30X is put into the tire 10, the band 40X is previously attached to the first extension portion 33a and the second extension portion 33b of the core 30X. Can be temporarily held through. In addition, the core 30X with the band 40X is wound into a small spiral shape and put into the tire 10, and then deployed in the circumferential direction of the rim 22. Thereby, not only the core 30X but also the band 40X can be wound around the rim 22 together. Therefore, after winding the core 30X around the rim 22, it is necessary to separately wrap the band 40X while putting a hand between the bead 11B and the rim 22 of the tire 10 or pushing the bead 11B toward the ledge portion 27. Therefore, the installation work of the band 40X can be facilitated.

  As shown in FIG. 7, at both ends of the band 40X, connecting means 60 for connecting the ends to each other after being wound around the drop groove 20a is provided. As shown in FIGS. 7 and 9, the connecting means 60 includes a clamp 61 attached to one end of the band 40X and a hooked portion 62 formed in a convex shape at the other end. (In FIG. 9, the extension portion 33 of the core 30X is not shown.) The clamp 61 includes a base 63 fixed to the front side surface of the band 40X, and the width direction of the band 40X on the base 63. The lever 64 is provided so as to be rotatable around an axis extending along the axis, and the hook member 65 is provided in a middle part of the lever 64 so as to be rotatable. As shown by the phantom line in FIG. 7, when the band 40X is attached, the lever 64 is raised to hook the hook member 65 on the hooked portion 62 at the other end of the band 40X. Subsequently, as shown by the solid line in FIG. Accordingly, the other end portion of the band 40X hooked by the hook member 65 can be pulled toward the clamp 61, that is, the one end portion side of the band 40X. As a result, the band 40X is strongly tightened, and the first extending portion 33a of the core 20 can be pressed against the inner bottom surface of the drop groove 20a. Conversely, when removing the band 40X, the lever 64 of the clamp 61 is raised. Thereby, the hook member 65 can be easily detached from the hooked portion 62. According to the clamp-type connecting means 60, not only a special tool but also a general tool such as a screwdriver is not necessary.

The present invention is not limited to the above embodiment, and various modifications can be made.
For example, the base plate 32 may be of a length that “corresponds” to the circumferential length of the ledge portion 27, and does not necessarily have to be shorter than the circumferential length of the ledge portion 27, and may be substantially equal to or longer than that. May be. In the case of the equal length, the both ends of the base plate 32 are connected to each other by the core both ends connecting means. When it is long, both end portions overlap each other, and this overlapping portion is connected by the core both end connecting means.
Further, the connecting means 50 and 60 at both ends of the bands 40 and 40X only need to be disposed at a circumferential position that “corresponds” to the position of the air valve attachment of the wheel 20, and is substantially the same as the position of the air valve attachment position. You may arrange | position not only in a direction position but in the circumferential direction position on the opposite side to the air valve installation position approximately 180 degrees.

It is a partial front sectional view of a wheel with a tire of vehicles concerning a 1st embodiment of the present invention. It is a partial side sectional view of the wheel with a tire which meets the II-II line of Drawing 1. (A) It is side surface sectional drawing at the time of the non-run-flat of the whole wheel with a tire. (B) It is side surface sectional drawing in the state in which the core both-ends gap was located in the lower side at the time of the run flat of the said wheel with a tire. It is a perspective view of the said core for wheels. It is a perspective view of the both ends connection part of the band for fixation of the said core. It is a partial front sectional view of a wheel with a tire of a vehicle concerning a 2nd embodiment of the present invention. It is a partial side sectional view of the above-mentioned wheel with a tire which meets the VII-VII line of Drawing 6. It is a perspective view of the extension part of the core for wheels of the said 2nd Embodiment. It is a perspective view of the both end connection part of the core fixing band of the said 2nd Embodiment.

Explanation of symbols

10 Tire 11A, 11B Tire bead 20 Wheel 20a Drop groove 20b Hole for air valve 21 Disc 22 Drop center rim 23A, 23B Flange portion 24A, 24B Bead seat portion 25 Drop portion 26A, 26B Side wall portion 27 Ledge portion 30 Run flat Core 30X for run-flat core 30a Gap 30b between split core bodies 31 Gap at both ends of core 31 Core body 32 Base plate 33 Extension part 33a First extension part 33b Second extension part 34 Core both ends connecting means 35 Split core body 40 band (band-shaped body)
40X band (band)
42A, 42B Slanted wall (edge of strip)
50 Band both ends connecting means 51 Screw locking part 52 Female screw hole 53 Screw 60 Connecting means 61 Clamp 62 Hooked part 63 Base 64 Lever 65 Hooking member

Claims (7)

A run-flat core provided on the rim of the wheel,
A base plate wound around the rim in the form of a strip having a length corresponding to the circumference of the rim;
A core body provided on the base plate and receiving a load during run flat,
In the state in which the base plate is wound around the rim, a gap between both ends of the core is formed between one winding end of the core body and the other winding end so as to generate vibration or noise during run flat. The run-flat core for the wheel. 2. The run-flat medium according to claim 1, wherein the core body is divided into a plurality in the extending direction of the base plate, and the plurality of divided core bodies are connected by the base plate. Child. The run-flat core according to claim 2, wherein a gap between the split core bodies that is sufficiently narrower than the gap between both ends of the core is formed between adjacent split core bodies. The run-flat core according to any one of claims 1 to 3, wherein a connecting means for connecting these end portions is provided between both end portions of the base plate. The core for run-flat according to any one of claims 1 to 4, wherein the core body and the base plate are formed of different members and bonded to each other. The run-flat core according to any one of claims 1 to 4, wherein the core body and the base plate are integrally formed with each other. A structure for supporting the core according to any one of claims 1 to 6 on a rim of a wheel,
The core is wound around the outer peripheral surface of the rim portion of the rim, and the base plate has an extending portion that extends into an annular drop groove defined by the sidewall portion and the drop portion of the rim. A run-flat core support structure, characterized in that a belt-like body is wound around the drop groove in a tensioned state, and the extension portion of the core is pressed against the inner surface of the drop groove by the belt-like body. .

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