Tire capable of improving rigidity and reducing noise

Abstract

The tire provided by the invention comprises a tire body and a plurality of tread pattern structures. The tire body is provided with a tread, the tread pattern structures are fixedly arranged in the center of the tread of the tire body and arranged in the rotating direction of the tire, each tread pattern structure is provided with a tread pattern block and at least one step block, each tread pattern block is provided with a front end face and a rear end face, the front end face faces the rotating direction of the tire, and the rear end face is back to the rotating direction of the tire. The step blocks are connected to the rear end faces of the tread pattern blocks, and the height of the step blocks is smaller than that of the tread pattern blocks. Therefore, the tire provided by the invention can achieve the effects of improving the rigidity of the tread, improving the high-speed stability and reducing the noise of the tread through the arrangement of the step blocks.

Description

Technical Field

[0001] The present invention relates to a tire, and more particularly to a tire that can enhance rigidity and reduce noise. Background Art

[0002] The tire disclosed in TW I494230 has a plurality of tread blocks disposed on the tread surface. At least one of these tread blocks includes a tread surface, a leading landing sidewall surface extending inward from the leading edge of the tread surface, and a trailing landing sidewall surface extending inward from the trailing edge of the tread surface. The trailing landing sidewall surface includes a front side region formed by a gentle slope inclined toward the trailing landing side and a root side region connected to the front side region and extending inward. Such a structural design can maintain traction and improve braking stability, but it cannot achieve the effects of increasing tread rigidity and reducing tread noise.

[0003] The pneumatic tire disclosed in CN 103370213 has a plurality of tread blocks disposed on the tread surface. Each tread block includes a thickness reduction portion in the overlapping region. The thickness reduction portion includes at least two portions where the thickness of the tread blocks gradually decreases. Such a structural design can take into account mud evacuation performance and traction performance, but it cannot achieve the effects of increasing tread rigidity and reducing tread noise.

[0004] The tire disclosed in CN 101588935 has a plurality of blocks disposed on the tread surface. Each block includes a contact surface, a rear tail surface, a front guide surface, and two longitudinal surfaces. A step is provided on the front guide surface to improve the wear performance of the tire. However, such a structural design cannot achieve the effects of increasing tread rigidity and reducing tread noise.

[0005] The tire disclosed in US11633987 includes a tread portion and a grounding portion. The grounding portion includes a grounding sidewall facing a circumferential groove. The grounding sidewall includes a first surface, a second surface, and a step portion located between the first and second surfaces. The step portion is used to improve the performance of the tire when driving on snow. However, such a structural design cannot achieve the effects of increasing tread rigidity and reducing tread noise. Summary of the Invention

[0006] The main object of the present invention is to provide a tire that can enhance rigidity and high-speed stability and reduce the noise generated by impact with the ground.

[0007] To achieve the above main object, the tire of the present invention includes a carcass and a plurality of tread pattern structures. The carcass has a tread; these tread pattern structures are fixed to the center of the tread of the carcass and are arranged along a rotation direction of the tire. Each tread pattern structure has a tread pattern block and at least one step block. The tread pattern block has a front end face and a rear end face. The front end face faces the rotation direction of the tire, and the rear end face faces away from the rotation direction of the tire. The at least one step block is connected to the rear end face of the tread pattern block, and the height of the at least one step block is lower than the height of the tread pattern block.

[0008] As can be seen from the above, the tire of the present invention uses the step block arranged on the rear end face of the tread pattern block to give a supporting force to the tread pattern block during operation. By arranging these step blocks, the deformation of the tread generated under the action of high-speed centrifugal force can be effectively inhibited, thereby improving the rigidity and high-speed stability of the tread, and also inhibiting the vibration generated by the impact of the tread on the ground to achieve the effect of reducing noise.

[0009] Preferably, each tread pattern structure further has a groove, which is arranged at the center of the tread pattern block and extends along the rotation direction of the tire. The soil can be embedded through this groove to improve the off-road performance.

[0010] Preferably, each tread pattern structure has two such step blocks, namely a first step block and a second step block. The first step block is connected between the tread pattern block and the second step block, and the height of the first step block is higher than the height of the second step block. By arranging the first and second step blocks, the rigidity and high-speed stability of the tread can be further improved, and the noise generated by the impact of the tread on the ground can be reduced.

[0011] Preferably, the arc length of the second step block is smaller than the arc length of the first step block. Through the tapered design, the force can be further concentrated to improve the stability.

[0012] Preferably, these tread pattern structures are arranged at equal intervals along the rotation direction of the tire, so that a space for soil embedding can be reserved between two adjacent tread pattern structures to improve the off-road performance.

[0013] Preferably, each tread pattern block is polygonal to provide directivity.

[0014] Regarding the detailed structure, characteristics, assembly or usage method of the tire provided by the present invention that can improve rigidity and reduce noise, it will be described in detail in the subsequent embodiments. However, those with ordinary knowledge in the field of the present invention should understand that these detailed descriptions and the specific embodiments listed for implementing the present invention are only used to illustrate the present invention and are not used to limit the patent application scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the perspective view of the tire of the present invention;

[0016] Figure 2 is the top view of the tire of the present invention;

[0017] Figure 3 is Figure 2 the partial enlarged view;

[0018] Figure 4 is the cross-sectional view of the tread pattern structure provided by the tire of the present invention;

[0019] Figure 5a is the partial enlarged view of the tire of the present invention, mainly showing different cross-sections taken when testing the tread rigidity;

[0020] Figure 5b is the curve graph of the tire of the present invention, mainly showing the relationship between different cross-sections and rigidity;

[0021] Figure 6 is the curve graph of the tire of the present invention, mainly showing the relationship between speed and decibels;

[0022] Figure 7 is the curve graph of the tire of the present invention, mainly showing the relationship between frequency and decibels;

[0023] Reference numerals:

[0024] 10: Tire

[0025] A: Axis of rotation

[0026] D: Direction of rotation

[0027] E: Equatorial plane

[0028] 20: Carcass

[0029] 22: Tread

[0030] 24: Sidewall

[0031] 26: Shoulder

[0032] 30: Tread pattern structure

[0033] 31: Tread pattern block

[0034] 312: Front end face

[0035] 314: Rear end face

[0036] 316: Contact surface

[0037] H3: Height of the tread pattern block

[0038] 32: Groove

[0039] 33: First - order block

[0040] 332: Contact surface

[0041] 334: Outer end face

[0042] H1: Height of the first - order block

[0043] W1: Arc length of the first - order block

[0044] 34: Second - order block

[0045] 342: Contact surface

[0046] 344: Outer end face

[0047] H2: Height of the second - order block

[0048] W2: Arc length of the second - order block

[0049] 40: Shoulder tread structure

[0050] 42: Shoulder tread block

[0051] S: Space P1 - P7: Cross - section. Detailed implementation manners

[0052] The applicant hereby states that throughout the entire specification, including the embodiments introduced below and the claims in the patent application scope, the directional terms are based on the directions in the drawings. Secondly, in the embodiments and drawings to be introduced below, the same reference numerals represent the same or similar components or their structural features.

[0053] Please refer to Figure 1 , the tire 10 of the present invention can roll forward along a rotation direction D around a rotation axis A, and it includes a carcass 20, a plurality of tread pattern structures 30, and a plurality of shoulder tread structures 40.

[0054] The carcass 20 has a tread 22, two sidewalls 24, and two shoulders 26, and the shoulders 26 are integrally connected between the tread 22 and the sidewalls 24.

[0055] These tread pattern structures 30 are integrally provided at the center of the tread 22 of the carcass 20 and are arranged at equal intervals along the rotation direction D of the tire 10. As Figure 2 and Figure 3As shown, each tread pattern structure 30 has a tread pattern block 31 and a groove 32. Each tread pattern block 31 is polygonal and is symmetric about an equatorial plane E of the tire 10 (the equatorial plane E referred to herein is a plane perpendicular to the rotation axis A of the tire 10 and passing through the center of the tread 22). The groove 32 is located at the center of the tread pattern block 31 and extends along the rotation direction D of the tire 10 and passes through the equatorial plane E. Again, as Figure 3 and Figure 4 shown, each tread pattern block 31 has a front end face 312, a rear end face 314, and a contact surface 316 connecting the front and rear end faces 312, 314. The front end face 312 faces the rotation direction D of the tire 10, and the rear end face 314 faces away from the rotation direction D of the tire 10. In addition, each tread pattern structure 30 further has a first step block 33 and a second step block 34. The first step block 33 is integrally connected between the rear end face 314 of the tread pattern block 31 and the second step block 34. The first step block 33 has a contact surface 332 for contacting the ground, and the second step block 34 has a contact surface 342 for contacting the ground. Among them, as Figure 4 shown, the height H1 of the first step block 33 is lower than the height H3 of the tread pattern block 31 and higher than the height H2 of the second step block 34. In this embodiment, H1 is twice H2. Again, as Figure 3 shown, the arc length W2 of the second step block 34 is less than the arc length W1 of the first step block 33. In this embodiment, W2 is 0.75 - 0.8 times W1, so that the first and second step blocks 33, 34 are arranged in a tapered manner. Moreover, there is an angle θ between the outer end face 334 of the first step block 33 and the rotation direction D and between the outer end face 344 of the second step block 34 and the rotation direction D. In this embodiment, the angle θ is between 5 - 30 degrees.

[0056] The two shoulder pattern structures 40 are integrally provided on the two shoulders 26 of the carcass 20. As Figure 1 and Figure 2 shown, each shoulder pattern structure 40 has a plurality of polygonal shoulder pattern blocks 42. These shoulder pattern blocks 42 are arranged at equal intervals along the rotation direction D of the tire 10 to provide steering stability.

[0057] As can be seen from the above, when the tire 10 of the present invention moves along the rotation direction D, the front end face 312 of the tread block 31 first contacts the ground, then the contact surface 316 of the tread block 31 contacts the ground, and finally at least one of the contact surfaces 332, 342 of the first and second step blocks 33, 34 contacts the ground according to different road conditions. The arrangement of the first and second step blocks 33, 34 can effectively suppress the deformation of the tread 22 under the action of high-speed centrifugal force, thereby improving the rigidity and high-speed stability of the tread 22, and can also suppress the vibration generated by the collision of the tread 22 with the ground to achieve the effect of reducing noise. The first and second step blocks 33, 34 are arranged in a tapered manner in terms of arc length, which can further concentrate the force to improve the high-speed stability. In addition, when the tire 10 of the present invention moves along the rotation direction D, the grooves 32 can be used to embed soil to improve the off-road performance. Moreover, the two adjacent tread pattern structures 30 are not connected, and a space S for soil embedding is reserved between each other (such as Figure 4 to improve off-road performance.

[0058] On the other hand, Figure 5a and Figure 5b As shown, in Figure 5a It can be seen that in different sections P1-P7 (the section P1-P7 referred to here is a plane perpendicular to the equatorial plane E and is equally divided into 7 positions with a width of about 1.5 cm), the tire with steps is much more rigid in the longitudinal direction than the conventional tire without steps. Figure 5b The test conditions are wind pressure 180kpa and load 130kgf; Figure 6 It can be seen that at different speeds, the tread noise of the tire 10 with steps is lower than that of the conventional tire without steps. Figure 6 The test conditions are standard JASOC606, wind pressure 180kpa and load 130kgf; Figure 7 It can be seen that the tread noise of the tire with the step block in the mid-frequency range (200-2000Hz) is lower than that of the conventional tire without the step block. In other words, the tire 10 of the present invention does have better tread rigidity and tread noise reduction effect than the conventional tire without the step block.

Claims

1. A tire, characterized in that: Contains: a carcass having a tread; and A plurality of tread pattern structures are arranged at the center of the tread of the tire body and along a rotation direction of the tire, each of the tread pattern structures has a tread pattern block and at least one step block, the tread pattern block has a front end face and a rear end face, the front end face faces the rotation direction of the tire, and the rear end face faces away from the rotation direction of the tire, the at least one step block is connected to the rear end face of the tread pattern block, and the height of the at least one step block is lower than the height of the tread pattern block.

2. The tire according to claim 1, characterized in that: in, Each of the tread pattern structures further has a groove, which is arranged at the center of the tread pattern block and extends along the rotation direction of the tire.

3. The tire according to claim 1 or 2, characterized in that: Each of the tread pattern structures has two steps, namely a first step block and a second step block. The first step block is connected between the tread pattern block and the second step block, and the height of the first step block is higher than that of the second step block.

4. The tire according to claim 3, characterized in that: in, The height of the first stage block is twice the height of the second stage block.

5. The tire according to claim 3, characterized in that: in, The arc length of the second stage block is smaller than the arc length of the first stage block.

6. The tire according to claim 5, characterized in that: in, The arc length of the second stage block is 0.75-0.8 times the arc length of the first stage block.

7. The tire according to claim 1, characterized in that: in, The tread pattern structures are arranged at equal intervals along the rotation direction.

8. The tire according to claim 1, characterized in that: in, Each of the tread pattern blocks is polygonal.

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