CN100445110C - pneumatic tire - Google Patents

Abstract

The present invention relates to a pneumatic tire having an elastic fastening belt having excellent durability for stably attaching components independent of the tire to the inner surface of a tread. The pneumatic tire of the present invention is a pneumatic tire in which parts separated from the tire are mounted on the inner surface of the tread of the tire through an elastic fixing belt, wherein the pneumatic tire is made of metal with a width of 10 to 40 mm and a thickness of 0.1 to 0.5 mm The strip-shaped body constitutes the above-mentioned elastic fixing belt.

Description

pneumatic tire

technical field

The present invention relates to a pneumatic tire, and more specifically, to a pneumatic tire in which components separated from the tire are attached to the inner surface of the tread via an annular elastic fixing belt.

Background technique

Inside the tire, operations such as installing sound-absorbing components for noise reduction, and installing pressure sensors and temperature sensors for air pressure management are often carried out.

Since these components are independent from the tire, there is a problem that they are often displaced or dropped due to tire deformation or centrifugal force when the tire is running, and it is difficult to install these components in a stable state.

As a representative example of the above-mentioned components, since the sound-absorbing member for absorbing the vibration sound of the air inside the tire is directly attached to the inner surface of the tread, the sound-absorbing effect is better, so it is proposed to add a sound-absorbing member to the inner surface of the tread (such as , refer to Patent Document 1). However, in the case of attaching the sound absorbing member to the inner surface of the tire with an adhesive or the like, since a member different from the tire is attached inside the tire, stress often occurs on the adhesive interface due to deformation of the tire when the tire rotates. Concentration produces peeling. Therefore, there are many difficulties in this installation method.

On the other hand, the applicant of the present application proposes a countermeasure against the above-mentioned problem. That is, when installing the sound absorbing member on the inner surface of the tread, the sound absorbing member is installed in the tread by utilizing the elastic force of the elastic fixing belt made of synthetic resin. surface (Japanese Patent Application No. 2002-28432). However, in order to obtain a predetermined elastic force (rigidity), it is necessary to increase the thickness of the elastic fixing belt made of synthetic resin to a certain extent, so that when a material with a large thickness is subjected to bending deformation, the greater the thickness, the greater the surface stress, so there is The problem of reduced fatigue life.

Patent Document 1: Japanese Patent Laid-Open No. 62-216803

Contents of the invention

An object of the present invention is to provide a pneumatic tire having an elastic fastening belt having excellent durability for stably attaching components independent of the tire to the inner surface of a tread.

In order to achieve the above objects, the present invention has the following structures (1) to (9).

(1) A pneumatic tire, which is a pneumatic tire in which parts separated from the tire are mounted on the inner surface of the tread of the tire through an elastic fixing belt, wherein the metal tire with a width of 10 to 40 mm and a thickness of 0.1 to 0.5 mm The resulting belt-shaped body constitutes the above-mentioned elastic fixing belt.

(2) The pneumatic tire according to the above (1), wherein the belt-shaped body is a metal material having a tensile strength of 400 to 1400 MPa.

(3) The pneumatic tire according to (1) or (2) above, wherein the outer peripheral surface of the elastic fixing band is covered with rubber or synthetic resin.

(4) The pneumatic tire according to (1), (2) or (3) above, wherein the circumferential length of the elastic fixing band is set to be 10 to 50 mm shorter than the inner circumferential length of the tire central portion.

(5) The pneumatic tire according to any one of (1) to (4) above, wherein the member is a sound absorbing member made of a porous material.

(6) The pneumatic tire according to any one of (1) to (5) above, wherein the circumferential length of the elastic fixing band is a constant length.

(7) The pneumatic tire according to any one of (1) to (5) above, wherein the elastic fixing belt has a stretching mechanism for automatically adjusting the circumference at at least one location on the circumference of the elastic fixing belt.

(8) The pneumatic tire according to the above (7), wherein the expansion and contraction mechanism is constituted by an elastic spring mechanism.

(9) The pneumatic tire according to the above (7), wherein the expansion and contraction mechanism is a mechanism that slidably connects both end portions of the elastic fixing band to each other.

According to the pneumatic tire of the present invention as described above, since the elastic fixing band for attaching parts independent from the tire to the inner surface of the tread is made of metal, the thickness thereof can be made extremely thin in the range of 0.1 to 0.5 mm. state, so when the tire rotates, even if it is repeatedly subjected to bending deformation, the stress on the inner and outer surfaces is small, and the fatigue life is prolonged, so the durability of the elastic fixing belt can be improved.

Description of drawings

Fig. 1 is a meridian sectional view showing an example of a pneumatic tire as an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a portion surrounded by line R in FIG. 1 .

FIG. 3A is a side view for explaining an example of an arrangement relationship when components are attached by elastic fixing bands as one embodiment of the present invention.

Fig. 3B is a side view for explaining an example of an arrangement relationship when components are attached by elastic fixing bands as another embodiment of the present invention.

Fig. 4 is a side view for explaining the buckling phenomenon of the tire.

5 is a schematic meridian cross-sectional view schematically showing when the circumferential length of the elastic fixing band 6 is set to be 10 to 50 mm shorter than the circumferential length of the inner peripheral surface of the tread portion 1, when the pneumatic tire is not mounted on an automobile. The state of means that the elastic fixing band 6 is not in contact with the inner surface of the tire tread 1 .

Fig. 6 is a side view showing an embodiment example of the pneumatic tire of the present invention using an elastic fixing belt provided with a telescopic mechanism for automatically adjusting the circumference of the elastic fixing belt at least in one of its circumferences .

FIG. 7( a ) is a schematic diagram showing another form example of the expansion and contraction mechanism used in the elastic fixing band in one embodiment of the present invention shown in FIG. 6 .

FIG. 7( b ) is a schematic diagram showing another form example of the expansion and contraction mechanism used in the elastic fixing band in one embodiment of the present invention shown in FIG. 6 .

Fig. 8 is a schematic diagram showing yet another example of the expansion and contraction mechanism used in the elastic fixing band in the embodiment of the present invention shown in Fig. 6 .

Label description

1: Tread

2: Bead part

3: Sidewall

5: Sound-absorbing components

6: Elastic fixing strap

7a, 7b, 7c: leaf spring

7: Connection fixture

G: road surface

Q: Grounding part

T: tire

t: Thickness of the elastic fixing strap

W: Width of elastic fixing strap

Detailed ways

Hereinafter, the configuration of the present invention will be described in detail with reference to the drawings. The same components in the drawings will be given the same reference numerals, and repeated description will be omitted.

1 is a meridian cross-sectional view illustrating an embodiment in the case where a sound-absorbing member made of a porous material is mounted on the tread inner surface of the pneumatic tire of the present invention as an independent member, and FIG. The cross-sectional view of the raised part is a side view for explaining the main part (the part surrounded by R) in FIG. 1 .

In FIG. 1 , a pneumatic tire T includes a tread portion 1 , a pair of left and right bead portions 2 , and sidewall portions 3 connecting the tread portion 1 and the bead portions 2 to each other. On the inner surface of the tread portion 1 , a sound absorbing member 5 , which is a member independent from the tire, is attached via a metal elastic fixing band 6 .

Both ends in the longitudinal direction of the elastic fixing belt 6 are connected to each other to form an endless belt. The method of connection is not particularly limited, and the two ends can be overlapped and sealed and fastened by a strapping machine or a sealing machine, or connected by a pair of fastening belts. There is no particular limitation on how the sound-absorbing member 5 and the elastic fixing band 6 are connected. Depending on the type and shape of the sound-absorbing member 5 , they can be bonded by adhesive or fastening means such as bolts.

In the present invention, the elastic fixing band 6 is made of a strip-shaped body made of a thinner metal material, the overall structure has elastic force, the width W is formed to be 10-40 mm, preferably 15-30 mm, and the thickness t is formed to be 0.1-0.5 mm, preferably 0.1 to 0.2 mm. The metal material is preferably a metal material having a tensile strength of 400 to 1400 MPa, particularly preferably stainless steel or a shape memory alloy having elastic properties.

With such a configuration, the sound-absorbing member 5 can be stably pressed against the inner surface of the tread for a long time by means of the elastic force of the elastic fixing belt 6, and the surface stress received by the elastic fixing belt 6 when the tire is running can be minimized. Thereby prolonging the fatigue life.

The positional relationship between the sound-absorbing component 5 and the elastic fixing band 6 in the radial direction of the tire is not particularly limited, except that the sound-absorbing component 5 is configured to be crimped on the inner surface of the tire through the elastic fixing band 6 from the inside of the tire as shown in Figure 3 (a). Alternatively, as shown in FIG. 3( b ), it may be arranged outside the sound absorbing member 5 , or may be arranged so as to penetrate through the central portion of the sound absorbing member 5 in the thickness direction.

As shown in Figure 3 (b), when the elastic fixing band 6 is configured to directly contact the inner surface of the tire, in order to prevent damage to the tire surface caused by the metal elastic fixing band 6, the tire inner surface of the elastic fixing band 6 can be The outer peripheral surface of the side is covered with rubber or synthetic resin.

In addition, even if it is arranged as shown in FIG. 3( a ), in order to prevent damage to the sound absorbing member 5 , the outer peripheral surface of the elastic fixing band 6 may be covered with rubber or synthetic resin. If these rubbers or synthetic resins are made of foam, the damage prevention effect can be further exhibited.

In addition, in the present invention, when the circumferential length of the elastic fixing band 6 is fixed, as shown in FIG. 4 , the land contact portion Q where the tire contacts the road surface G may bend. This bending may cause unstable holding of the sound absorbing member 5 or cause damage to the inner surface of the tire. In order to prevent such a phenomenon, the circumferential length of the elastic fixing band 6 is preferably set to be 10 to 50 mm smaller than the circumferential length of the inner peripheral surface of the tread portion 1 .

In particular, as shown in FIG. 3( b ), such a configuration is effective when the elastic fixing band 6 is arranged on the outside of the sound absorbing member 5 and the elastic fixing band 6 is in contact with the tire tread 1. The composition of the inner surface contact. When the circumferential length of the elastic fixing band 6 is set to be 10 to 50 mm smaller than the circumferential length of the inner peripheral surface of the tread portion 1 as described above, as shown in the schematic cross-sectional view shown in FIG. The inner surface of the tire tread 1 is not in contact, but only when the pneumatic tire is not mounted on an automobile, there is no particular problem. That is, when the pneumatic tire is mounted on an automobile, the pneumatic tire is partially dented due to the total amount of the automobile, and the circumference of the inner surface of the tire tread 1 becomes slightly smaller, so the elastic fixing band is in contact with the inner surface of the tire tread 1. An ideal installation state can thus be achieved.

In addition, in the above description, the case where the perimeter of the elastic fixing band 6 is a fixed length has been described, but in the present invention, the perimeter of the elastic band 6 is not only a fixed length, but also variable. That is, especially by making the perimeter of the elastic fixing band 6 variable and adjusting the perimeter of the sound absorbing member 5, the same sound absorbing member 5 and elastic fixing band 6 can be used for a plurality of types of pneumatic tires. Furthermore, since the circumferential length of the elastic fixing band 6 can be finely adjusted, the sound absorbing member 5 and the elastic fixing band 6 can be mounted on the entire circumference of the inner surface of the tread portion 1 of the tire T in a more suitable state, without It becomes an obstacle to workability at the time of rim assembly.

In particular, in order to make the circumference of the elastic fixing band 6 variable and adjust the circumference of the sound-absorbing member 5, it is preferable to use a telescopic mechanism that automatically adjusts the circumference at at least one position on the circumference of the elastic fixing band. elastic straps.

If an embodiment example of the elastic fixing band is shown and described in FIG. As shown, at least one position on the circumference (there are 4 positions in the figure) will cut a slit in the length of the circumference, and the gap between the slits will be connected by a leaf spring 7a bent into a U shape, thereby constituting the whole of the elastic fixing belt 6 . The portion of the U-shaped leaf spring 7a is formed to function as a telescopic mechanism that automatically absorbs the circumferential direction component of the force applied to the elastic fixing band 6 . In the form of the pneumatic tire constituted by the embodiment shown in FIG. 6 , the elastic fixing band 6 is arranged on the outer peripheral side of the sound absorbing member 5 as shown in FIG. 3( b ).

In this way, as the expansion and contraction mechanism made of the leaf spring 7a, as shown in FIG. 7(a) and FIG. Furthermore, although the number of telescopic mechanisms formed on the circumference of the elastic fixing band 6 is not particularly limited, it is preferable to arrange them equally at 3 to 8 positions on the circumference.

As mentioned above, even if an external force such as buckling acts on the elastic fixing belt 6 when the tire is set with the telescopic mechanisms 7a, 7b, 7c during driving, the telescopic mechanism can automatically This external force is absorbed, so the life of the elastic fixing band 6 can be extended, and the band-shaped sound absorbing member 5 can be stably attached to the inner surface of the tread.

Fig. 8 shows yet another embodiment of the telescoping mechanism. Both ends 6 b and 6 c in the longitudinal direction of the elastic fixing band 6 are slidably connected to each other by a connecting jig 7 . That is, one end 6b of the elastic fixing band 6 is fixed to the connecting jig 7, and the other end 6c is free to slide in the direction of the arrow. In order to make the sliding smooth, the end 6c of the elastic fixing band 6 and/or the sliding surface of the connecting jig 7 can be covered with fluororesin or coated with lubricant.

With such a configuration, as described above, the elastic fixing band 6 can automatically expand and contract to absorb the external force such as bending, etc., so that the fatigue life of the elastic fixing band 6 can be extended, and the belt-shaped sound absorbing member 5 can be stably attached. Mounts to the inner surface of the tread. That is, in the past, due to bending, there was a problem that the holding of the sound-absorbing member 5 was unstable or the fatigue life of the elastic fixing band 6 was shortened. The tires of the mechanism can alleviate the above-mentioned problems.

In the description of the above-mentioned embodiment, the sound-absorbing member 5 made of a porous material has been described as an example of the sound-absorbing member 5 installed inside the tire independent from the tire. However, as long as the member is installed as an independent member ( Storage) The parts inside the tire can be anything, especially not limited to sound-absorbing parts. For example, it may be an air pressure sensor or a temperature sensor provided for tire air pressure control.

The low-noise pneumatic tire of the present invention can be utilized in the tire manufacturing industry, and furthermore, can be effectively used in the automobile manufacturing industry to realize automobiles equipped with low-noise pneumatic tires.

Claims (8)

1. A pneumatic tire, which is a pneumatic tire in which a sound-absorbing component made of a porous material independent from the tire is installed on the inner surface of the tread of the tire through an elastic fixing belt, wherein the width is 10 to 40mm and the thickness is A band-shaped body made of metal of 0.1 to 0.5 mm constitutes the above-mentioned elastic fixing band; and, The elastic fixing belt is annularly arranged along the inner peripheral surface of the sound-absorbing component, so that the sound-absorbing component is crimped and held on the inner surface of the tread by the elastic force of the elastic fixing belt; or The elastic fixing band is fixedly arranged along the outer peripheral surface of the sound absorbing member, and the elastic fixing band is crimped and held on the inner surface of the tread by elastic force. 2. The pneumatic tire according to claim 1, wherein the belt-shaped body is a metal material having a tensile strength of 400 to 1400 MPa. 3. The pneumatic tire according to claim 1 or 2, wherein the outer peripheral surface of the elastic fixing band is covered with rubber or synthetic resin. 4. The pneumatic tire according to claim 1, wherein the circumferential length of the elastic fixing band is set to be 10 to 50 mm shorter than the inner circumferential length of the tire central portion. 5. The pneumatic tire according to claim 1, wherein the circumference of the elastic fixing band is a fixed length. 6 . The pneumatic tire according to claim 1 , wherein the elastic fixing band has a telescopic mechanism for automatically adjusting the circumference at at least one location on the circumference of the elastic fixing band. 6 . 7. The pneumatic tire according to claim 6, wherein the expansion and contraction mechanism is constituted by a spring mechanism of an elastic body. 8. The pneumatic tire according to claim 6, wherein the expansion and contraction mechanism is a mechanism that slidably connects both ends of the elastic fixing band to each other.

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