Bionic tread pattern with improved aquaplaning performance

Abstract

The application discloses a kind of bionic tread patterns for improving water resistance, belong to tire design technical field.The pattern includes four longitudinal grooves, two of which are main longitudinal grooves, one side is auxiliary longitudinal groove, and the other side is secondary longitudinal groove.The secondary longitudinal groove and auxiliary longitudinal groove on both sides of the main longitudinal groove are connected by a connecting groove at a certain angle to the main longitudinal groove.The two main longitudinal grooves and the two groove areas corresponding to them have a certain phase difference.The application can effectively reduce the water film in the front area of the wheel by using the classification structure and asymmetric structure of plant veins, improving the water resistance of the tire, and the classification design of the main and auxiliary grooves can reduce the area of the groove in the joint area, thereby avoiding affecting the dry grip, rolling resistance and other performance of the tire.

Description

Technical Field

[0001] This invention belongs to the field of tire design technology and relates to a biomimetic tread pattern that improves the anti-skid performance of passenger car tires. Background Technology

[0002] When a car travels on a puddle-covered road, at a certain speed, the water around the wheels cannot be expelled in time, causing a film of water to form. This leads to the tires gradually losing contact with the road surface, making them very prone to slipping. When the tires completely lose contact with the road, hydroplaning occurs. At this point, the car completely loses braking and steering power, directly impacting the safety of the driver and passengers. Therefore, improving the hydroplaning resistance of tires is of great significance for vehicle driving safety.

[0003] The water-resistant properties of tire treads are strongly correlated with the volume of the tread grooves; the larger the volume of the tread grooves, the stronger the drainage capacity and the better the water-resistant performance. However, increasing the volume of the tread grooves often leads to a reduction in the actual contact area between the tire and the road surface, thus affecting other tire performance characteristics. Domestic patent CN204567152U improves tire water-resistant performance by adding small grooves at the tread blocks, but this method still increases drainage capacity by increasing the total volume of the grooves, thus reducing the actual contact area between the tire and the road surface to some extent, affecting dry grip, rolling resistance, and other performance characteristics. Domestic patent CN219277150U improves the lateral grooves of the tread, but in order to balance other tire performance characteristics, its improvement in water-resistant performance is not significant. Therefore, there is an urgent need for a water-resistant tire tread pattern that significantly improves water-resistant performance without reducing the actual contact area between the tire and the road surface and without affecting dry grip, rolling resistance, and other performance characteristics.

[0004] Currently, the concept of biomimicry is increasingly encouraging people to use the laws and functional characteristics of the biological world as the basis for technological innovation and progress. Plant veins are the fastest channel for water transport in plants. During the long growth process, plant veins have evolved structures with optimal flow characteristics, and their fractal structure can effectively improve water transport efficiency. Therefore, utilizing the characteristics of leaf vein fractal structures and applying them to tire tread groove design, allowing water to flow out of the grooves more quickly and preventing the formation of a water film in the contact area, is also an effective way to improve tire hydroplaning resistance. Summary of the Invention

[0005] This invention proposes a biomimetic tire tread pattern structure that significantly improves the drainage capacity of the tread grooves and enhances the tire's anti-skid performance on wet roads, while ensuring that dry grip and rolling resistance are not affected.

[0006] To achieve the above objectives, the following technical solution is adopted:

[0007] A biomimetic tire tread pattern for improving hydroplaning resistance includes: four continuous longitudinal grooves, two of which are primary longitudinal grooves, with a non-continuous auxiliary longitudinal groove on one side near the center, and a secondary longitudinal groove on the side near the shoulder. Connecting grooves are provided between the parallel longitudinal grooves, with the secondary longitudinal grooves connected to the primary longitudinal grooves via connecting grooves, and the auxiliary longitudinal grooves merging into the primary longitudinal grooves via connecting grooves. One primary longitudinal groove and its corresponding connecting grooves, secondary longitudinal grooves, and auxiliary longitudinal grooves form a biomimetic parting area. A transverse groove is also provided in the shoulder area, connecting to the secondary longitudinal grooves.

[0008] As a further improvement of the present invention, the width of a single main longitudinal groove is 9-11 mm, and the center line of the groove is 35-45 mm away from the center line of the grounding imprint.

[0009] As a further improvement of the present invention, the center line of the secondary longitudinal groove and the center line of the auxiliary longitudinal groove are 20-25mm apart from the center line of the corresponding primary longitudinal groove.

[0010] As a further improvement of the present invention, the width of a single secondary longitudinal groove is 70%-90% of that of the primary longitudinal groove.

[0011] As a further improvement of the present invention, the length of a single auxiliary longitudinal groove is 45-55 mm, and the width is the same as that of the secondary longitudinal groove.

[0012] As a further improvement of the present invention, the connecting grooves on both sides of each main longitudinal groove are asymmetrically distributed.

[0013] As a further improvement of the present invention, the angle between the connecting groove and the corresponding main longitudinal groove is 30°-60°, and the distance between two adjacent connecting grooves on different sides of the same main longitudinal groove is 12-18mm.

[0014] As a further improvement of the present invention, each connecting groove and the longitudinal groove are provided with a rounded corner, the radius of the rounded corner at the acute angle is 2mm, and the radius of the rounded corner at the obtuse angle is 5mm.

[0015] As a further improvement of the present invention, the phase difference between adjacent biomimetic fractal regions formed by two different main longitudinal grooves is 15°-20°.

[0016] The beneficial effects of this invention are:

[0017] By utilizing the biomimetic fractal structure of leaf veins, the drainage capacity of the tread pattern is improved without increasing the volume of the tread grooves. At the same time, the asymmetrical layout on both sides of the main longitudinal grooves and the angle formed by them with the connecting grooves can effectively reduce the flow resistance of water in the grooves, thus improving the anti-skid performance of the tread pattern. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the tire tread pattern of the present invention;

[0019] Figure 2 This is a magnified view of a single biomimetic fractal region.

[0020] Figure 3 The following is a flow velocity cloud diagram of the water flow inside the biomimetic fractal structure patterned grooves, as shown in the example.

[0021] Figure 4 This is a cloud map showing the flow velocity of water inside a typical horizontal and vertical patterned groove.

[0022] In the diagram: 1 is the main longitudinal groove of the outer transition zone; 2 is the main longitudinal groove of the inner transition zone; 3 is the secondary longitudinal groove of the outer shoulder area; 4 is the secondary longitudinal groove of the inner shoulder area; 5 is the auxiliary longitudinal groove of the outer transition zone; 6 is the auxiliary groove of the inner transition zone; 7 is the connecting groove a of the outer transition zone; 8 is the connecting groove b of the outer transition zone; 9 is the connecting groove a of the inner transition zone; 10 is the connecting groove b of the inner transition zone; 11 is the acute angle fillet; 12 is the obtuse angle fillet; 13 is the lateral groove.

[0023] A is the intersection of the centerline of the outer transition zone connecting trench a(7) and the edge of the main longitudinal trench (1) in the outer transition zone; B is the intersection of the outer transition zone connecting trench b(8) and the edge of the main longitudinal trench (1) in the outer transition zone. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0026] like Figure 1As shown, this invention is a biomimetic tire tread pattern for improving hydroplaning performance, comprising: a main longitudinal groove (1) in the outer transition zone, a main longitudinal groove (2) in the inner transition zone, a secondary longitudinal groove (3) in the outer shoulder zone, and a secondary longitudinal groove (4) in the inner shoulder zone, totaling four through longitudinal grooves. A non-through auxiliary longitudinal groove (5) is provided on the side of the main longitudinal groove (1) in the outer transition zone near the center area. The main longitudinal groove (1) in the outer transition zone and the secondary longitudinal groove (3) in the outer shoulder zone are connected by groove a (7) in the outer transition zone. The outer transition zone main longitudinal groove (1) and outer transition zone auxiliary groove (5) are connected through outer transition zone connecting groove b (8); a non-through inner transition zone auxiliary longitudinal groove (6) is provided on the side of the inner transition zone main longitudinal groove (2) near the center area. The inner transition zone main longitudinal groove (2) and inner shoulder zone secondary longitudinal groove (4) are connected through inner transition zone connecting groove b (10). The inner transition zone main longitudinal groove (2) and inner transition zone auxiliary longitudinal groove (6) are connected through inner transition zone connecting groove a (9). The two sides of the tire shoulder area are provided with transverse grooves (13), one end of which is a water outlet, and the other end is connected to the outer shoulder zone secondary longitudinal groove (3) and inner shoulder zone secondary longitudinal groove (4).

[0027] The width of the main longitudinal groove (1) in the outer transition zone and the main longitudinal groove (2) in the inner transition zone is 9-11 mm. The center line of the main longitudinal groove (1) in the outer transition zone and the main longitudinal groove (2) in the inner transition zone is 35-45 mm away from the center line of the grounding imprint. The width of the secondary longitudinal groove (3) in the outer shoulder area and the secondary longitudinal groove (4) in the inner shoulder area is 70%-90% of that of the main longitudinal groove (1) in the outer transition zone. The length of the auxiliary longitudinal groove (5) in the outer transition zone and the auxiliary groove (6) in the inner transition zone is 45-55 mm, and the width is equal to that of the secondary longitudinal groove (3) in the outer shoulder area. The biomimetic parting structure consisting of the main longitudinal groove (1) in the outer transition zone, the secondary longitudinal groove (3) in the outer shoulder zone, the auxiliary longitudinal groove (5) in the outer transition zone, the connecting groove a (7) in the outer transition zone, and the connecting groove b (8) in the outer transition zone can improve the absorption of water flow in the front part of the tire-ground contact area by the tread pattern. This structure can reduce the volume occupied by the tread grooves to a certain extent while ensuring drainage capacity.

[0028] The angle between the connecting groove of the inner and outer transition zone and its corresponding main longitudinal groove is 30°-60°. This angle range can reduce the resistance of water flow, increase the water flow velocity at the outlet, and improve drainage efficiency.

[0029] The centerlines of the secondary longitudinal grooves (3) in the outer shoulder area and the auxiliary longitudinal grooves (5) in the outer transition area are 20-25 mm apart from the centerline of the main longitudinal grooves (1) in the outer transition area; the centerlines of the secondary longitudinal grooves (4) in the inner shoulder area and the auxiliary longitudinal grooves (6) in the inner transition area are 20-25 mm apart from the centerline of the main longitudinal grooves (2) in the inner transition area. Acute rounded corners (11) are provided at the acute angles inside the tread grooves, and obtuse rounded corners (12) are provided at the obtuse angles inside the tread grooves. The radius of the acute rounded corners (11) is 2 mm, and the radius of the obtuse rounded corners (12) is 5 mm. The rounded corners at the connection points can reduce the flow resistance of water, allowing the water flow in the grooves to obtain better flow characteristics, while effectively avoiding stress concentration on the tire tread at this point, thus increasing tire lifespan.

[0030] like Figure 2 As shown, the main longitudinal groove (1) in the outer transition zone, the secondary longitudinal groove (3) in the outer shoulder zone, the auxiliary longitudinal groove (5) in the outer transition zone, the connecting groove a (7) in the outer transition zone, and the connecting groove b (8) in the outer transition zone constitute a release-type area. The intersection point A of the center line of the connecting groove a (7) in the outer transition zone and the edge of the main longitudinal groove (1) in the outer transition zone and the intersection point B of the connecting groove b (8) in the outer transition zone and the edge of the main longitudinal groove (1) in the outer transition zone are 12-18mm apart in the longitudinal direction, so that the connecting groove a (7) and the connecting groove b (8) in the outer transition zone are asymmetrically distributed with respect to their corresponding main longitudinal grooves.

[0031] A main longitudinal groove, along with its two side longitudinal grooves and auxiliary longitudinal grooves, forms a biomimetic parting zone. The phase difference between the biomimetic parting zones formed by the two main longitudinal grooves is 15°-20°, ensuring that there are enough longitudinal grooves to participate in drainage at any moment when the wheel is rolling, thereby improving the anti-scratch performance of the tread pattern.

[0032] Fluid dynamics simulation was used to compare the drainage performance of this embodiment with that of a common transverse and longitudinal tread pattern at a vehicle speed of 60 km / h and a water depth of 3 mm. The results are as follows: Figure 3 , Figure 4 As shown

[0033] Figure 3 The illustrated embodiment shows a water flow velocity cloud map in the biomimetic fractal pattern groove, with a maximum water flow velocity of 34.41 m / s. Figure 4 The velocity contour map of water flow in the ordinary transverse and longitudinal patterned grooves shown indicates that the maximum flow velocity is 18.89 m / s. Comparing the contour maps, it can be seen that the overall flow velocity in the biomimetic fractal patterned grooves is higher than that in the ordinary transverse and longitudinal patterned grooves, demonstrating that the biomimetic fractal structure achieves the function of reducing flow resistance and increasing water flow velocity.

[0034] The table below compares the average velocity and total flow rate at the outlet for both methods.

[0035]

[0036] Among them, the embodiment using the leaf vein release pattern structure has a similar area occupied by the groove in the ground plane compared with the ordinary horizontal and vertical pattern structure, but the water flow velocity at the outlet of the embodiment is increased by 1.58m / s and the flow rate at the outlet is increased by 13%.

[0037] In conjunction with the above embodiments, the present invention effectively reduces the flow resistance of water in the grooves by adopting leaf vein biomimetic fractal structure grooves, significantly improving the drainage effect of the grooves. At the same time, the area of ​​the grooves in the ground plane is not increased, thus avoiding affecting the tire's dry grip, rolling resistance and other performance characteristics.

[0038] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A biomimetic tire tread pattern for improving hydroplaning resistance, characterized in that... include: The two main longitudinal grooves located in the transition zone are the main longitudinal groove in the outer transition zone (1) and the main longitudinal groove in the inner transition zone (2); the two secondary longitudinal grooves located in the tire shoulder area are the secondary longitudinal groove in the outer tire shoulder area (3) and the secondary longitudinal groove in the inner tire shoulder area (4); the auxiliary longitudinal grooves located in the transition zone are the auxiliary longitudinal groove in the outer transition zone (5) and the auxiliary longitudinal groove in the inner transition zone (6); the connecting grooves located on both sides of the two main longitudinal grooves are the connecting groove a (7) in the outer transition zone, the connecting groove b (8) in the outer transition zone, the connecting groove a (9) in the inner transition zone, and the connecting groove b (10) in the inner transition zone; the main longitudinal groove in the outer transition zone (1) and the secondary longitudinal groove in the outer tire shoulder area (2) The longitudinal groove (3) is connected to the outer transition zone connecting groove a (7), and the main longitudinal groove (1) of the outer transition zone is connected to the auxiliary longitudinal groove (5) of the outer transition zone through the outer transition zone connecting groove b (8); the main longitudinal groove (2) of the inner transition zone is connected to the secondary longitudinal groove (4) of the inner shoulder area through the inner transition zone connecting groove b (10), and the main longitudinal groove (2) of the inner transition zone is connected to the auxiliary longitudinal groove (6) of the inner transition zone through the inner transition zone connecting groove a (9); an acute angle fillet (11) is provided at the acute angle of the connection, and an obtuse angle fillet (12) is provided at the obtuse angle of the connection; a transverse groove (13) is provided in the shoulder areas on both sides. The auxiliary longitudinal groove (5) in the outer transition zone and the auxiliary longitudinal groove (6) in the inner transition zone are 45-55 mm in length and 70%-90% of the width of the main longitudinal groove (1) in the outer transition zone. The angle between the outer transition zone connecting groove a (7) and the outer transition zone connecting groove b (8) and the outer transition zone main longitudinal groove (1) is 30°-60°; the angle between the outer transition zone connecting groove b (8) and the inner transition zone connecting groove a (9) and the inner transition zone main longitudinal groove (2) is 30°-60°; the intersection point A of the center line of the outer transition zone connecting groove a (7) and the edge of the outer transition zone main longitudinal groove (1) and the intersection point B of the outer transition zone connecting groove b (8) and the edge of the outer transition zone main longitudinal groove (1) are 12-18mm apart along the longitudinal direction of the pattern.

2. The biomimetic tread pattern for improving hydroplaning performance according to claim 1, characterized in that... The width of the main longitudinal groove (1) in the outer transition zone and the main longitudinal groove (2) in the inner transition zone is 9-11 mm, and the center line of the main longitudinal groove (1) in the outer transition zone and the main longitudinal groove (2) in the inner transition zone is 35-45 mm away from the center line of the grounding imprint.

3. The biomimetic tread pattern for improving hydroplaning performance according to claim 1, characterized in that... The outer transition zone connecting groove a (7) and outer transition zone connecting groove b (8) are asymmetrically distributed on both sides of the main longitudinal groove (1) of the outer transition zone, and the width is 70%-90% of the main longitudinal groove (1) of the outer transition zone; the center line of the secondary longitudinal groove (3) of the outer tire shoulder area and the auxiliary longitudinal groove (5) of the outer transition zone is 20-25mm away from the center line of the main longitudinal groove (1) of the outer transition zone.

4. The biomimetic tread pattern for improving hydroplaning performance according to claim 1, characterized in that... The inner transition zone connecting groove a (9) and inner transition zone connecting groove b (10) are asymmetrically distributed on both sides of the main longitudinal groove (2) of the inner transition zone, and the width is 70%-90% of the main longitudinal groove (2) of the inner transition zone; the center line of the secondary longitudinal groove (4) of the inner shoulder area and the auxiliary longitudinal groove (6) of the inner transition zone is 20-25mm away from the center line of the main longitudinal groove (2) of the inner transition zone.

5. The biomimetic tread pattern for improving hydroplaning performance according to claim 1, characterized in that... The radius of the acute-angle fillet (11) is 2mm, and the radius of the obtuse-angle fillet (12) is 5mm.

6. The biomimetic tread pattern for improving hydroplaning performance according to claim 1, characterized in that... The main longitudinal groove (1) of the outer transition zone and the secondary longitudinal groove (3) of the outer shoulder zone, and the auxiliary longitudinal groove (5) of the outer transition zone constitute a biomimetic parting region; the main longitudinal groove (2) of the inner transition zone and the secondary longitudinal groove (4) of the inner shoulder zone, and the auxiliary longitudinal groove (6) of the inner transition zone constitute a biomimetic parting region, and the phase difference between the two biomimetic parting regions is 15°-20°.

Images