Damping mechanism and method for improving power and braking performance of vehicle and reducing vibration and noise

Abstract

The invention provides a damping mechanism and a method for improving vehicle power and braking performance and reducing vibration and noise, and belongs to the technical field of wheels. The damping mechanism is of an integrally-formed high polymer material elastic structure. The damping mechanism comprises a sleeve-shaped base body and rhombic reticulated protrusions, the sleeve-shaped base body is used for wrapping the outer side of the groove bottom wall of the rim, and the rhombic reticulated protrusions are arranged on the outer side of the sleeve-shaped base body in a protruding mode. In the embodiment of the invention, the specific damping mechanism is arranged on the outer side of the metal hub in a sleeving manner, so that the damping of the outer side of the metal hub is effectively improved, the vibration of the metal hub is reduced, and the purposes of improving the vehicle power and braking performance and reducing vibration and noise are achieved.

Description

Technical Field

[0001] The present application relates to the field of wheel technology, and in particular to a damping mechanism and a method for improving vehicle power, braking performance, vibration reduction and noise reduction. Background Art

[0002] Transmission efficiency, braking performance, vibration and noise are common indicators for evaluating the performance of motor vehicles. Existing vehicles use metal wheels and rubber tires to support, transmit and brake the vehicle. The wheels are rigidly connected to the vibration reduction system to form a suspension mechanism with buffering capacity. When the vehicle is driving, the tires roll in contact with the ground. Due to road and driving reasons, the tires will deform abnormally and the suspension system will expand and contract. As a result, the transmission efficiency and braking performance of the vehicle are affected in this process, and vibration and noise are easily generated. Summary of the invention

[0003] Research has found that road and driving conditions can cause abnormal deformation of tires and expansion and contraction of the suspension system, resulting in continuous changes in the tire contact area during the process.

[0004] Motor vehicles usually have two power indicators, namely engine or motor horsepower and wheel horsepower. Generally, the wheel horsepower of a vehicle is only 90% of the engine horsepower, which means that there must be a certain amount of slippage when the tire rolls, resulting in power loss. When the tire contact area is reduced, the transmission efficiency will inevitably be affected.

[0005] The tire slip rate also affects the vehicle's braking efficiency. The larger the tire's contact area with the ground, the higher the braking rate. Under emergency braking conditions, the violent friction vibration between the tire and the ground will be transmitted upward. The vehicle's suspension system is responsible for absorbing harmful energy, which will cause the suspension system to float up and down. Coupled with the deformation of the tire itself, it will inevitably lead to high-frequency changes in the tire's contact area with the ground. Within the same braking time, the larger the tire's contact area with the ground, the less the tire and suspension system will float up and down, which will inevitably result in a shorter braking distance, thereby improving braking efficiency.

[0006] The quality of the suspension system will also affect the vehicle's transmission efficiency and shock absorption capabilities. This is because vibrations are inevitable when the tire rolls in contact with the ground. The high-pressure air in the tire acts as a conduction medium to transmit the vibrations to the metal wheel hub. The metal wheel hub is rigidly connected to the suspension mechanism and can only absorb and release vibrations through the suspension.

[0007] Based on this, the purpose of this application is to provide a damping mechanism and a method for improving vehicle power, braking performance and reducing vibration and noise. By arranging a specific damping mechanism on the outside of the metal wheel hub, the damping of the outer side of the metal wheel hub can be effectively improved and the vibration of the metal wheel hub can be reduced, thereby achieving the purpose of improving vehicle power, braking performance and reducing vibration and noise.

[0008] The embodiment of the present application is implemented as follows: In the first aspect, an embodiment of the present application provides a damping mechanism, which is an integrally formed elastic structure of a polymer material; the damping mechanism includes a sleeve-shaped base and a diamond-shaped mesh protrusion, the sleeve-shaped base is used to wrap around the outer side of the groove bottom wall of the rim, and the diamond-shaped mesh protrusion is protruded on the outer side of the sleeve-shaped base.

[0009] In some embodiments, the width of the diamond side of the diamond-shaped cross-hatching protrusion gradually decreases from one end close to the sleeve-like base to one end far away from the sleeve-like base.

[0010] In some embodiments, in a longitudinal section of the rhombus side, an end of the rhombus side away from the sleeve-shaped base is in an acute angle.

[0011] In some embodiments, the damping mechanism is configured such that when the sleeve-shaped base is wrapped around the outer side of the groove bottom wall, in the radial direction of the sleeve-shaped base, the top of the diamond-shaped mesh protrusion does not exceed the safety boss of the rim.

[0012] In some embodiments, the height of the diamond sides of the diamond-shaped mesh protrusions gradually decreases from one end away from the safety boss to one end close to the safety boss.

[0013] In some embodiments, in the rhombus unit of the rhombus reticular protrusion, the two diagonals are respectively a first diagonal and a second diagonal, the length of the first diagonal is smaller than the length of the second diagonal, the first diagonal extends along the axial direction of the sleeve-like base, and the second diagonal extends along the circumferential direction of the sleeve-like base.

[0014] In some embodiments, the thickness of the sleeve-like substrate is greater than 2 mm.

[0015] In some embodiments, the damping mechanism further includes a valve core exhaust boss, which is protruding on the inner side of the sleeve-shaped base, and two ends of the valve core exhaust boss correspond to two ends of the sleeve-shaped base in the axial direction.

[0016] In some embodiments, a tire pressure sensor groove is concavely provided on the outer side of the sleeve-shaped base; on the outer side of the sleeve-shaped base, the diamond-shaped mesh protrusion is located in an area where no tire pressure sensor groove is provided.

[0017] In a second aspect, an embodiment of the present application provides a method for improving vehicle power, braking performance, and reducing vibration and noise, using a damping mechanism and a metal hub as in the above embodiment, including: wrapping a sleeve-shaped base around the outer side of the bottom wall of the rim groove.

[0018] The damping mechanism and the method for improving vehicle power, braking performance and reducing vibration and noise provided by the embodiments of the present application have at least the following beneficial effects: The damping mechanism is formed in one piece using a polymer elastic material. The sleeve-shaped base of the damping mechanism is wrapped around the outer side of the groove bottom wall of the rim of the metal wheel hub. The damping mechanism and the metal wheel hub form a composite structure, which effectively improves the damping of the outer side of the metal wheel hub and absorbs the vibration of the metal wheel hub. The sharp wedge effect of the diamond-shaped mesh protrusions on the outer side of the sleeve-shaped base can weaken and destroy the energy transmitted by the high-pressure air vibration inside the tire; at the same time, the diamond-shaped grooves surrounded by the diamond-shaped mesh protrusions also have a sound-trapping effect, which can restrain the tendency of vibration diffusion and change the diffusion angle, and effectively reduce vibration by destroying, restraining and disrupting the vibration transmission process. [l1] Based on the above design of the damping mechanism, the vibration reduction of the metal wheel hub can be better achieved.

[0019] While reducing the vibration of the metal wheel hub, the vibration and noise of the vehicle can be effectively reduced.

[0020] While reducing the vibration of the metal wheel hub, the contact area between the tire and the ground can be increased. On the one hand, it can effectively improve the conversion rate of wheel horsepower, thereby improving the transmission efficiency and power of the vehicle; on the other hand, it can effectively improve the braking rate, thereby improving the braking performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A cross-sectional view of an existing wheel at a cross section; Figure 2 A cross-sectional view of an existing wheel in another cross section; Figure 3 A cross-sectional view of a wheel provided in an embodiment of the present application at a cross section; Figure 4 A cross-sectional view of a wheel provided in an embodiment of the present application in another cross-sectional view; Figure 5 A schematic diagram of a partial structure of a wheel provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a damping mechanism provided in an embodiment of the present application at a viewing angle; Figure 7 A schematic diagram of the structure of a damping mechanism provided in an embodiment of the present application at a viewing angle; Figure 8 A longitudinal cross-sectional view of a damping mechanism provided in an embodiment of the present application; Fig. 9 A cross-sectional view of a damping mechanism provided in an embodiment of the present application; Fig.10 The noise data of a 40 km / h speed bump when the embodiments and comparative examples of the present application are applied to a vehicle.

[0023] icon: 100-damping mechanism; 110-sleeve-shaped base; 120-diamond-shaped mesh protrusion; 130-valve core exhaust boss; 140-tire pressure sensor groove; 200-metal hub; 210-bottom wall of groove; 220-safety boss; 300-Tire; 400-Tire pressure sensor; 500-Valve core. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0025] It should be noted that “and / or” in this application, such as “Feature 1 and / or Feature 2”, refers to the three situations of “Feature 1” alone, “Feature 2” alone, or “Feature 1” plus “Feature 2”.

[0026] In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" in "one or more" refers to two or more; the range of "value a~value b" includes the two end values ​​"a" and "b", and the "unit" in "value a~value b+unit" represents the "unit" of both "value a" and "value b".

[0027] In order to facilitate the description and understanding of the embodiments of the present application, some application scenarios of the embodiments of the present application are first exemplarily described.

[0028] See also Figure 1 and Figure 2 , a wheel of a vehicle generally includes a metal hub 200 , a tire 300 , a tire pressure sensor 400 and a valve core 500 .

[0029] The outer circle of the metal hub 200 is a rim, also called a wheel ring; a groove is opened in the middle of the outer side of the metal hub 200, and the bottom side wall corresponding to the opening in the groove structure is the groove bottom wall 210; the end of the metal hub 200 is a safety boss 220.

[0030] The tire 300 is mounted on the safety boss 220 , and an air filling cavity is provided between the tire 300 and the rim for filling with high-pressure air.

[0031] The valve core 500 is usually connected to the wheel hub, and extends into the inflation cavity after passing through the groove bottom wall 210 of the rim.

[0032] The tire pressure sensor 400 is usually connected to the wheel hub, and its sensing end extends into the inflation cavity and is located near the groove bottom wall 210 of the rim.

[0033] See also Figure 3~Figure 5 The embodiment of the present application provides a wheel, which adopts a damping mechanism 100 to be sleeved on the outer side of the metal hub 200, effectively improving the damping of the outer side of the metal hub 200 and reducing the vibration of the metal hub 200, thereby achieving the purpose of improving the vehicle power, braking performance and reducing vibration and noise.

[0034] The technical solutions of the embodiments of the present application are exemplarily described below.

[0035] See also Figure 6 and Figure 7 In the first aspect, the embodiment of the present application provides a damping mechanism 100, which is an integrally formed polymer elastic structure. In the embodiment of the present application, the material of the damping mechanism 100 is a polymer elastic material, and its type is not limited; preferably, the material has the following properties: strong temperature resistance, good ductility, good shear resistance, and certain thermal conductivity; as an example, the material of the damping mechanism 100 is TPE (thermoplastic elastomer), which can be a TPE modified material.

[0036] The damping mechanism 100 includes a sleeve-shaped base 110 and a diamond-shaped mesh protrusion 120. The sleeve-shaped base 110 is annular and is used to wrap around the outside of the groove bottom wall 210 of the rim; optionally, the axial width of the sleeve-shaped base 110 is close to the axial width of the groove bottom wall 210 of the rim, so that the sleeve-shaped base 110 can better cover the groove bottom wall 210 of the rim; as an example, the edge of the sleeve-shaped base 110 does not exceed the safety line of the rim, which is usually arranged in an annular manner along the circumference of the rim, and the bottom wall 210 is convexly arranged and located at the edge area of ​​the groove bottom wall 210 close to the safety boss 220.

[0037] The diamond-shaped mesh protrusions 120 refer to protrusion structures arranged in a pattern of diamond edges; the diamond-shaped mesh protrusions are provided on the outer side of the sleeve-shaped base 110 .

[0038] In the prior art, the process of the tire 300 transmitting vibration to the vehicle body is tire 300 - high-pressure air - metal wheel hub 200 - suspension structure - vehicle body; the damping mechanism 100 provided in the embodiment of the present application is used to be mounted on the outside of the metal wheel hub 200. Based on this, the process of the tire 300 transmitting vibration to the vehicle body is tire 300 - high-pressure air - damping mechanism 100 - metal wheel hub 200 - suspension structure - vehicle body.

[0039] Among them, the damping mechanism 100 is integrally formed with a polymer elastic material, and is wrapped around the outer side of the groove bottom wall 210 of the rim of the metal wheel hub 200 through the sleeve-shaped base 110 of the damping mechanism 100. The damping mechanism 100 and the metal wheel hub 200 form a composite structure, which effectively improves the damping of the outer side of the metal wheel hub 200 and absorbs the vibration of the metal wheel hub 200. The wedge effect of the diamond-shaped mesh protrusion 120 on the outer side of the sleeve-shaped base 110 can weaken and destroy the energy transmitted by the high-pressure air vibration inside the tire 300; at the same time, the diamond-shaped groove surrounded by the diamond-shaped mesh protrusion 120 also has a sound-trapping effect, which can restrain the tendency of vibration diffusion and change the diffusion angle, and effectively reduce vibration by destroying, restraining and disrupting the transmission process of vibration. Based on the above design of the damping mechanism 100, the vibration reduction of the metal wheel hub 200 can be better achieved.

[0040] When the vibration of the metal hub 200 is reduced, the vibration and noise of the vehicle can be effectively reduced.

[0041] While reducing the vibration of the metal wheel hub 200, the contact area between the tire 300 and the ground can be increased. On the one hand, the conversion rate of wheel horsepower can be effectively improved, thereby improving the transmission efficiency and power of the vehicle; on the other hand, the braking rate can be effectively improved, thereby improving the braking performance of the vehicle.

[0042] In order to enable the sleeve-shaped base 110 to better absorb the self-excitation of the metal hub 200 and effectively suppress vibration transmission, in some embodiments, the thickness of the sleeve-shaped base 110 is greater than 2 mm. The thickness of the sleeve-shaped base 110 refers to its wall thickness in the radial direction.

[0043] See also Figure 7 In order to make the diamond-shaped mesh protrusion 120 better play the function of vibration reduction and noise reduction, in some embodiments, in the diamond-shaped unit of the diamond-shaped mesh protrusion 120, the two diagonals are respectively the first diagonal line and the second diagonal line, the length of the first diagonal line is less than the length of the second diagonal line, the first diagonal line extends along the axial direction of the sleeve-shaped base 110, and the second diagonal line extends along the circumferential direction of the sleeve-shaped base 110. [l2] See also Figure 8In some embodiments, the width of the diamond side of the diamond-shaped mesh protrusion 120 gradually decreases from one end close to the sleeve-shaped base 110 to one end away from the sleeve-shaped base 110. The width of the diamond side refers to its size in the axial direction of the sleeve-shaped base 110.

[0044] Furthermore, in the longitudinal section of the rhombus side, the end of the rhombus side away from the sleeve-like base 110 is in an acute angle shape. The longitudinal section of the rhombus side refers to a section perpendicular to the length direction of the rhombus side. It should be noted that the end of the rhombus side away from the sleeve-like base 110 can be a sharp acute angle shape, in which case the two side walls in the width direction of the rhombus side form an acute angle; the end of the rhombus side away from the sleeve-like base 110 can also be a shape similar to an acute angle, for example, the end of the rhombus side away from the sleeve-like base 110 has an arc chamfer, in which case the extension lines of the two side walls in the width direction of the rhombus side meet to form an acute angle.

[0045] In this design, the diamond edges of the diamond-shaped mesh protrusions 120 are configured as a sharp-angle structure with a wide bottom and a sharp top, so that the diamond-shaped mesh protrusions 120 can better exert the wedge effect, thereby better weakening and destroying the energy transmitted by the high-pressure air vibration inside the tire 300.

[0046] In some embodiments, the damping mechanism 100 is configured such that when the sleeve-shaped base 110 is wrapped around the outside of the groove bottom wall 210 , in the radial direction of the sleeve-shaped base 110 , the top of the diamond-shaped mesh protrusion 120 does not exceed the safety boss 220 of the rim.

[0047] Furthermore, the height of the rhombus side of the rhombus-shaped mesh protrusion 120 gradually decreases from the end away from the safety boss 220 to the end close to the safety boss 220. In other words, the closer to the safety boss 220, the smaller the height of the rhombus side of the rhombus-shaped mesh protrusion 120.

[0048] Based on the above design, it is possible to effectively avoid the damping mechanism 100 interfering with the assembly and disassembly of the tire 300 .

[0049] See also Figure 6 , Figure 8 and Fig. 9 In some embodiments, the damping mechanism 100 further includes a valve core exhaust boss 130 , which is protruding from the inner side of the sleeve-shaped base 110 , and two ends of the valve core exhaust boss 130 correspond to two ends of the sleeve-shaped base 110 in the axial direction.

[0050] In this design, a valve core exhaust boss 130 is convexly provided on the inner side of the sleeve-shaped base 110 to correspond to the valve core 500 and facilitate the inflation and deflation operations.

[0051] See also Fig. 9Optionally, the valve core exhaust bosses 130 are provided in two groups, and the two groups of valve core exhaust bosses 130 are symmetrically designed, which is beneficial to balancing the center of gravity of the damping mechanism 100 .

[0052] Furthermore, each group of valve core exhaust bosses 130 is provided with a plurality of strip-shaped protrusions, and the two ends of each strip-shaped protrusion correspond to the two ends of the sleeve-shaped base 110 in the axial direction. By designing a plurality of strip-shaped protrusions, a larger range can be provided for corresponding to the valve core 500, and a certain error tolerance is provided during installation, and the relative position accuracy requirements of the valve core 500 and the valve core exhaust boss 130 are reduced.

[0053] See also Figure 6 , Figure 7 and Fig. 9 In some embodiments, a tire pressure sensor groove 140 is concavely provided on the outer side of the sleeve-shaped base 110 ; on the outer side of the sleeve-shaped base 110 , the diamond-shaped mesh protrusion 120 is located in an area where the tire pressure sensor groove 140 is not provided.

[0054] In this design, a tire pressure sensor groove 140 is recessed on the outer side of the sleeve-shaped base 110 to provide space for the tire pressure sensor 400; no diamond-shaped mesh protrusion 120 is provided in the area where the tire pressure sensor groove 140 is located to avoid insufficient installation space for the tire pressure sensor 400 due to the presence of the diamond-shaped mesh protrusion 120.

[0055] See also Fig. 9 Optionally, the tire pressure sensor grooves 140 are provided in two groups, and the two groups of tire pressure sensor grooves 140 are symmetrically designed, which is beneficial to balancing the center of gravity of the damping mechanism 100 .

[0056] Secondly, the embodiments of the present application provide a method for improving vehicle power, braking performance and reducing vibration and noise, using a damping mechanism 100 and a metal hub 200 as in the above embodiments, including: wrapping a sleeve-shaped base 110 around the outer side of the groove bottom wall 210 of the rim.

[0057] It should be noted that, in the embodiment of the present application, the damping mechanism 100 may be wrapped on the outer side of the metal hub 200 in the form of integral wrapping or split wrapping.

[0058] The integral coating means directly coating the outer side of the metal hub 200 with injection molding to form the damping mechanism 100. Optionally, a groove may be pre-processed on the bottom wall 210 of the rim to increase the contact area and fixing position between the sleeve-shaped base 110 of the damping mechanism 100 and the hub.

[0059] The split coating means that a separate damping mechanism 100 is first prepared, and then the damping mechanism 100 is sleeved on the outer side of the metal hub 200 .

[0060] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0061] 1. The experimental conditions of each embodiment and comparative example are as follows: Example See also Figure 3~Figure 5 A wheel is provided, wherein a damping mechanism 100 is sleeved on the outer side of a metal hub 200. The damping mechanism 100 is an integrally formed TPE elastic structure, and is provided with a sleeve-shaped base 110, a diamond-shaped mesh protrusion 120, a valve core exhaust boss 130, and a tire pressure sensor groove 140.

[0062] The thickness of the sleeve-shaped base 110 is greater than 2 mm

[13] .

[0063] The tire pressure sensor grooves 140 are recessed on the outer side of the sleeve-shaped base 110 . The tire pressure sensor grooves 140 are arranged in two groups, and the two groups of tire pressure sensor grooves 140 are symmetrically designed.

[0064] The diamond-shaped mesh protrusion 120 is located in an area where the tire pressure sensor groove 140 is not provided. In the diamond unit of the diamond-shaped mesh protrusion, the length of the first diagonal line is less than the length of the second diagonal line, the first diagonal line extends along the axial direction of the sleeve-shaped base 110, and the second diagonal line extends along the circumferential direction of the sleeve-shaped base 110. In the longitudinal section of the diamond edge, the end of the diamond edge away from the sleeve-shaped base 110 is in an acute angle shape [l4]. When the sleeve-shaped base 110 is wrapped around the outer side of the groove bottom wall 210, in the radial direction of the sleeve-shaped base 110, the top of the diamond-shaped mesh protrusion 120 does not exceed the safety boss 220 of the rim; the closer to the safety boss 220, the smaller the height of the diamond edge of the diamond-shaped mesh protrusion 120 [l5].

[0065] The valve core exhaust bosses 130 are arranged in two groups, and the two groups of valve core exhaust bosses 130 are symmetrically designed. Each group of valve core exhaust bosses 130 is provided with a plurality of strip-shaped protrusions, and the two ends of each strip-shaped protrusion correspond to the two ends of the sleeve-shaped base 110 in the axial direction.

[0066] Comparative Example See also Figure 1~Figure 2 , providing a wheel, the difference from the embodiment is only that: the outer side of the metal hub 200 is not provided with a damping mechanism 100.

[0067] 2. The results of some test indicators of various embodiments and comparative examples applied to vehicles are as follows: Table 1. Service Braking Rate

[0068] Table 2. Braking data from 100 km / h to 0 km / h

[0069] Table 3. Acceleration data from 0 km / h to 100 km / h

[0070] Table 4. Driving resistance raw data

[0071] Among them, the "outward journey" stage and the "return journey" stage both show data of deceleration from 100Km / h to 0Km / h. The longer the gliding time and distance, the smaller the gliding resistance.

[0072] Table 5. Vehicle interior noise data

[0073] Also, see Fig.10 , Fig.10 The noise data of the vehicle at 40 km / h speed bump is shown. Fig.10 It can be seen that in the comparative example without the damping mechanism installed, the noise peak data is 75dB (A), the noise vibration time is from 1.5s to 3.5s, and the duration is 2s; in the embodiment with the damping mechanism installed, the noise peak data is 70dB (A), the noise vibration time is from 1.5s to 3s, and the duration is 1.5s. It can be seen that compared with the comparative example, the vehicle interior noise of the vehicle using the embodiment is reduced by 75dB (A), and the noise vibration time is shortened by 25%.

[0074] Combined with Table 1 to Table 5 and Fig.10 It can be seen that after the damping mechanism is sleeved on the outer side of the metal wheel hub, the dynamic performance and braking performance of the vehicle are effectively improved, and the vibration and noise of the vehicle are effectively reduced compared with the case where the damping mechanism is not sleeved.

[0075] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A damping mechanism, characterized in that: The damping mechanism is an integrally formed elastic structure of polymer materials; The damping mechanism comprises a sleeve-shaped base body and a diamond-shaped mesh protrusion, wherein the sleeve-shaped base body is used to wrap around the outer side of the groove bottom wall of the rim, and the diamond-shaped mesh protrusion is protruded on the outer side of the sleeve-shaped base body.

2. The damping mechanism according to claim 1, characterized in that: The width of the rhombus side of the rhombus mesh protrusion gradually decreases from one end close to the sleeve-shaped base to one end far away from the sleeve-shaped base.

3. The damping mechanism according to claim 2, characterized in that: In the longitudinal section of the rhombus side, one end of the rhombus side away from the sleeve-shaped base is in an acute angle shape.

4. The damping mechanism according to claim 1, characterized in that: The damping mechanism is configured such that when the sleeve-shaped base is wrapped around the outer side of the groove bottom wall, in the radial direction of the sleeve-shaped base, the top of the diamond-shaped mesh protrusion does not exceed the safety boss of the rim.

5. The damping mechanism according to claim 4, characterized in that: From an end away from the safety boss to an end close to the safety boss, the height of the rhombus side of the rhombus mesh protrusion gradually decreases.

6. The damping mechanism according to claim 1, characterized in that: In the rhombus unit of the rhombus mesh protrusion, two diagonals are respectively a first diagonal and a second diagonal, the length of the first diagonal is smaller than the length of the second diagonal, the first diagonal extends along the axial direction of the sleeve-shaped base, and the second diagonal extends along the circumferential direction of the sleeve-shaped base.

7. The damping mechanism according to any one of claims 1 to 6, characterized in that: The thickness of the sleeve-shaped base is greater than 2 mm.

8. The damping mechanism according to any one of claims 1 to 6, characterized in that: The damping mechanism further comprises a valve core exhaust boss, which is protrudingly arranged on the inner side of the sleeve-shaped base, and two ends of the valve core exhaust boss correspond to two ends of the sleeve-shaped base in the axial direction.

9. The damping mechanism according to any one of claims 1 to 6, characterized in that: A tire pressure sensor groove is concavely arranged on the outer side of the sleeve-shaped base; and the diamond-shaped mesh protrusion is located in an area on the outer side of the sleeve-shaped base where the tire pressure sensor groove is not arranged.

10. A method for improving vehicle power, braking performance and reducing vibration and noise, characterized in that: The damping mechanism according to any one of claims 1 to 9 is used in combination with a metal hub, comprising: wrapping the sleeve-shaped base around the outer side of the groove bottom wall of the rim.

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