A tire anti-skid pattern groove based on bionic shark skin scale structure

Abstract

The present invention discloses a tire anti-skid pattern groove based on a bionic shark skin scale structure, comprising a tire tread, a groove and a bionic convex structure; the groove is arranged on the tire tread, and a bionic convex structure is provided at the bottom of the longitudinal groove; the bionic convex structure is designed based on the shark skin scale structure, and is arranged in a rhombus-shaped staggered arrangement of three or two, wherein the convexity of the rear row is located on the center line between the two convexities of the front row. The provision of the bionic convex structure of the present invention can effectively reduce the water flow resistance in the groove, improve the drainage capacity of the groove, and reduce the possibility of hydroplaning of the tire without affecting other properties of the tire; at the same time, it can reduce air pump noise and reduce the air column resonance noise in the medium and high frequency bands; and the presence of the convex structure can squeeze out the stones in the groove, thereby extending the life of the tire.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile tires, and in particular relates to a tire anti-skid pattern groove based on a bionic shark skin scale structure. Background Art

[0002] With the strengthening of national economic strength and the rapid development of heavy industry, vehicles have become a necessity for people's daily life and work. When a car is driving on a flooded road, the roughness of the road itself decreases, the adhesion performance of the vehicle decreases, the accident rate of the vehicle increases, and the safety of people and property is greatly threatened. In order to improve the hydroplaning performance of tires, ensure life safety and reduce property losses, it is particularly important to deepen the research on the anti-hydroplaning characteristics of tires.

[0003] The hydroplaning phenomenon of tires is mainly caused by excessive dynamic water pressure acting on the tread, which causes the tire to separate from the road and lose its steering control ability. According to the momentum theorem, if the water flow rate in the tire contact area can be increased, the generation of dynamic water pressure will be reduced. The drainage of tires mainly depends on the tread grooves. Usually, the method of increasing the cross-sectional area of ​​the pattern grooves is used to increase the hydroplaning speed of the tire. However, as the cross-sectional area of ​​the pattern grooves increases, other aspects of tire performance such as noise and rolling resistance also increase.

[0004] Under the influence of long-term natural selection, organisms have evolved many special structures that adapt to their living environment, and their body surfaces encounter very little resistance during movement. For example, when sharks swim at high speed in the water, their body surfaces are composed of micro-grooved scales that follow the flow direction, which greatly reduces the resistance to swimming. Foreign scholars have applied shark skin structures to spacecraft to reduce resistance by 5.6%. The groove structure limits the turbulence of the fluid medium in the grooves, and at the same time reduces the tangential stress of the skin in the valleys. It can be seen that by biomimetic shark scales and applying biomimetic microstructures to the bottom of tire grooves, the anti-hydroplaning performance of tires can be improved without changing the cross-sectional area of ​​the grooves. Summary of the invention

[0005] The purpose of the present invention is to improve the drainage performance of the tire and reduce the air pump noise without changing the cross-sectional area of ​​the groove. Therefore, a tire anti-skid groove based on a bionic shark skin scale structure is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A tire anti-skid pattern groove based on a bionic shark skin scale structure comprises a tire tread, a groove and a bionic protrusion structure; the groove is arranged on the tire tread, and a bionic protrusion structure is provided at the bottom of the longitudinal groove; the bionic protrusion structure is designed based on the shark skin scale structure, and is arranged in a diamond shape with three protrusions in twos and threes in a staggered manner, wherein the protrusions in the rear row are located on the center line between the two protrusions in the front row.

[0008] Furthermore, the lateral arrangement gaps L of the bionic protrusion structures are all equal, and are 1.2-1.5 mm.

[0009] Furthermore, the longitudinal arrangement gap H of the bionic protrusion structure is equal and not larger than the transverse arrangement gap L, which is 1.0-1.5 mm.

[0010] Furthermore, there is a gap D between the bionic protrusion structure and the groove sidewall, and D is not less than 0.8 mm.

[0011] Furthermore, the bionic raised structure is composed of two auxiliary raised ribs connected to one main raised rib, and a groove is formed between the main and auxiliary raised ribs.

[0012] Furthermore, the groove is in an arc shape, occupies 1 / 3-1 / 2 of the circumference, and its radius r is 0.1-0.15 mm.

[0013] Furthermore, the height of the bionic protrusion structure is less than 1 / 3 of the groove depth, and its shape is arc-shaped along the longitudinal direction of the groove, wherein the total length of the bionic protrusion structure is l 1 1 / 3 of the way is the highest point of the structure.

[0014] Furthermore, the two secondary protrusion ribs of the bionic protrusion structure are symmetrical with respect to the main protrusion rib, and the secondary protrusion ribs are lower than the main protrusion ribs, and the height of the secondary protrusion ribs is 2 / 3 of the main protrusion ribs.

[0015] Furthermore, the total length of the bionic protrusion structure is 1 3.5-5mm, the secondary raised ribs are slightly shorter than the main raised ribs, and the length is l 2 2-3.5mm.

[0016] Furthermore, the width d of the bionic protrusion structure is 1.2-1.5 mm.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The bionic raised structure provided in the present invention can change the flow field structure of the turbulent boundary layer, increase the thickness of the viscous bottom layer, reduce the viscosity and drag of the fluid, increase the water flow velocity inside the pattern groove in the contact area, enhance the drainage capacity of the groove, and be more conducive to the discharge of water. As a result, it is not easy to generate water stagnation at the front end of the tire contact, reduce the dynamic water pressure on the tread, delay the occurrence of tire hydroplaning, and improve the anti-hydroplaning performance of the tire. At the same time, it can also reduce the air pump noise, reduce the air column resonance noise in the medium and high frequency bands, and the existence of the raised structure can squeeze out the stones in the groove, which plays a role in extending the life of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 A schematic diagram of the structure of the tire anti-skid pattern groove of the bionic shark skin scale structure of the present invention;

[0021] Figure 2 A top view of the groove of the bionic protrusion structure of the present invention;

[0022] Figure 3 A front view of a groove of the bionic protrusion structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the left-side structure of the bionic protrusion according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the front view structure of the bionic protrusion according to an embodiment of the present invention;

[0025] In the above figure: 1. tire tread; 2. groove; 3. bionic raised structure; 31. secondary raised rib; 32. main raised rib; 33. groove. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, a tire anti-skid pattern groove based on a bionic shark skin scale structure includes a tire tread 1 and a groove 2 arranged on the tread, and a bionic protrusion structure 3 imitating shark scales is arranged at the bottom of the groove 2. When a vehicle is driving on a flooded road, the arrangement of the bionic protrusion structure 3 can change the flow field structure of the turbulent boundary layer, increase the thickness of the viscous bottom layer, increase the water flow velocity inside the pattern groove in the contact area, enhance the drainage capacity of the groove 2, and be more conducive to the discharge of water.

[0028] like Figure 2 As shown, the bionic protrusion structures 3 are arranged in a staggered manner in a diamond arrangement, wherein the bionic protrusions 3 in the rear row are located on the center line between the two bionic protrusions 3 in the front row. The transverse arrangement gaps L of the bionic protrusion structures 3 are equal, L is 1.2-1.5 mm; the longitudinal arrangement gaps H are equal and not greater than the transverse arrangement gaps L, H is 1.0-1.5 mm. The staggered arrangement of the bionic protrusion structures 3 and the setting of the arrangement gaps can better affect the sudden structure of the fluid boundary layer, change the fluid in the groove 2 into a stable state, and accelerate the discharge of the water flow.

[0029] like Figure 2 As shown, the number of bionic protrusion structures 3 in the diamond arrangement can vary with the width of the groove 2. When the groove 2 is narrow, it can be arranged in a two-to-one staggered pattern, and when the groove 2 is wide, it can be arranged in a four-to-three staggered pattern.

[0030] like Figure 3 , 4 As shown, there is a gap D between the bionic raised structure 3 and the side wall of the groove 2, and D is not less than 0.8 mm. The bionic raised structure 3 is composed of two secondary raised ribs 31 and a main raised rib 32, and a groove is formed between the main and secondary raised ribs, wherein the two secondary raised ribs 31 are symmetrical about the main raised rib 32, and the length and height of the secondary raised rib 31 are lower than the main raised rib 32. Due to the presence of the arc-shaped raised ribs, the translation of the lateral vortex is reduced, the interaction of the vortices is reduced, the energy efficiency is greatly improved, the water flow resistance is reduced, and the air pump noise is reduced; the presence of the raised ribs raises the position of the secondary vortex, so that the groove 33 inside the raised rib is filled with low-speed and quiet fluid, the thickness of the viscous bottom layer is increased, the plane shear stress is reduced, and the water flow velocity in the groove 2 is increased.

[0031] like Figure 4 , 5 As shown, the width d of the bionic protrusion structure 3 is 1.2-1.5 mm, and the total length l 1 That is, the length of the main raised rib 32 is 3.5-5 mm, and the length of the auxiliary raised rib 31 is l 2 The height of the main protruding rib 32 is less than 1 / 3 of the depth of the groove 2, and its shape is arc-shaped along the longitudinal direction of the groove 2. 1 The 1 / 3 point of the structure is the highest point, and the height of the secondary raised rib 31 is 2 / 3 of the main raised rib 32. If the height of the bionic raised structure 3 is too large, it will increase the water flow resistance and cause the water skiing phenomenon to occur faster; if the height is too small, it will not work on the water flow and is difficult to process.

[0032] Under the same test conditions, the tread hydrodynamic pressure values ​​of the tire with the original pattern and the tire with the bionic convex structure 3 at different water flow speeds are compared. The results are shown in the following table:

[0033]

[0034] It can be seen from the table that after the bionic protrusion structure is set on the tire pattern groove, the dynamic water pressure on the tire tread is reduced, and as the speed increases, the dynamic water pressure on the tread of the tire with the bionic protrusion structure decreases more and more obviously. This shows that the structure of the present invention can speed up the speed of the water flow inside the grounding groove, delay the hydroplaning phenomenon of the tire, and improve the anti-hydroplaning performance of the tire. At the same time, it can also reduce the air pump noise and the air column resonance noise in the low, medium and high frequency bands. In addition, the presence of the bionic protrusion structure can squeeze out the stones in the groove, which plays a role in extending the life of the tire.

[0035] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and principles of the design of the present invention shall be included in the protection scope determined by the claims of the present invention.

Claims

1. A tire anti-skid pattern groove based on a bionic shark skin scale structure, characterized in that: The invention comprises a tire tread (1), a groove (2) and a bionic protrusion structure (3); the groove (2) is arranged on the tire tread (1), and a bionic protrusion structure (3) is provided at the bottom of the longitudinal groove (2); the bionic protrusion structure (3) is designed based on the shark skin scale structure, and is arranged in a diamond shape with three protrusions arranged in a staggered manner, wherein the protrusions in the rear row are located on the center line between the two protrusions in the front row; The bionic raised structure (3) is composed of two secondary raised ribs (31) and a main raised rib (32) connected together, a groove (33) is formed between the main and secondary raised ribs, the groove (33) is arc-shaped, occupies 1 / 3-1 / 2 of the circumference, and its radius r is 0.1-0.15mm, the two secondary raised ribs (31) of the bionic raised structure (3) are symmetrical about the main raised rib (32), and the secondary raised ribs (31) are lower than the main raised rib (32), and the height is 2 / 3 of the main raised rib (32).

2. The tire anti-skid pattern groove based on the bionic shark skin scale structure according to claim 1, characterized in that: The lateral arrangement gaps L of the bionic protrusion structures (3) are all equal and are between 1.2 and 1.5 mm.

3. The tire anti-skid pattern groove based on the bionic shark skin scale structure according to claim 1, characterized in that: The longitudinal arrangement gaps H of the bionic protrusion structures (3) are all equal and no larger than the transverse gaps L, and are in the range of 1.0-1.5 mm.

4. The tire anti-skid pattern groove based on the bionic shark skin scale structure according to claim 1, characterized in that: There is a gap D between the bionic protrusion structure (3) and the side wall of the groove (2), and D is not less than 0.8 mm.

5. The tire anti-skid pattern groove based on the bionic shark skin scale structure according to claim 1, characterized in that: The height of the bionic protrusion structure (3) is lower than 1 / 3 of the depth of the groove (2), and its shape is arc-shaped along the longitudinal direction of the groove (2), wherein the highest point of the bionic protrusion structure (3) is at 1 / 3 of the total length l1.

6. The tire anti-skid pattern groove based on the bionic shark skin scale structure according to claim 5, characterized in that: The total length l1 of the bionic protrusion structure (3) is 3.5-5 mm, and the secondary protrusion rib (31) is slightly shorter than the primary protrusion rib (32), with a length l2 of 2-3.5 mm.

7. The tire anti-skid pattern groove based on the bionic shark skin scale structure according to claim 5, characterized in that: The width d of the bionic protrusion structure (3) is 1.2-1.5 mm.

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