CN108773246A - Tire noise reducing flow spoiler - Google Patents

Abstract

The invention relates to a noise-reducing spoiler for tires, which belongs to the field of tires. There is a wheel rim, and the spoiler fixed support with the same width as the bottom of the rim groove is set on the wheel rim. There are slots with unequal intervals distributed on the spoiler fixed support, and the spoiler blades are fixed in the slots. The direction is at an angle to the rim width direction. The invention has a simple structure, and without changing the structure of the tire, by adding spoiler blades in the tire and rim assembly, the vibration mode of the tire cavity is changed, and the possibility of resonance with the vehicle suspension system is reduced. Increased driving comfort and quietness. Simultaneously, this invention is completely detachable, and after changing tires and rims, it can be disassembled and used repeatedly.

Description

tire noise reduction spoiler

technical field

The invention relates to the field of tires, in particular to a tire noise reduction spoiler.

Background technique

As we all know, tire cavity resonance, that is, cavity noise, has a resonance frequency of about 200~250Hz. The gas in the cavity of the tire is one of the factors that generate the standing wave of the tire. The standing wave of the tire can interact with the rim, so that the vibration energy is transmitted to the cab in the form of sound waves through the suspension system. The noise of the cavity has become an optimized tire/vehicle important aspect of drivability.

The main reason for tire cavity noise is that the basic mode of the cavity of the axisymmetric tire experiences a single wavelength, and there are maximum and minimum pressure points at the opposite positions of the tire, and the node line is located between the maximum and minimum pressure points. When the tire rolls under load, the ground contact marks cause gas turbulence in the cavity, causing cavity noise.

Some tire manufacturers reduce the tire cavity noise by attaching sound-absorbing materials to the inner surface of the tire tread. Although this method can effectively absorb the resonance sound of the tire cavity, it increases the manufacturing cost of the tire, and after completing the service life of the tire resulting in waste of material.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a tire noise reduction spoiler, which can change the air column mode in the tire cavity, solve the resonance of the vehicle suspension system caused by the vibration of the tire cavity, and increase the comfort of the ride Safety and quietness; at the same time, it does not increase the cost of tire manufacturing, and can be reused, suitable for all tires of the same specification.

The technical solution adopted by the present invention to solve the technical problem is: a tire noise reduction spoiler, which is provided with a rim, which is characterized in that the rim is fitted with a spoiler fixing support with the same width as the bottom of the rim groove, and the spoiler There are slots with unequal intervals distributed on the fixed support of the device, and spoiler blades are fixed in the slots, and the direction of the slots has a certain angle with the width direction of the wheel rim.

The present invention can also be realized by the following measures: the spoiler blade is composed of a petiole and a blade fan, the petiole is used to connect the blade fan with the slot of the spoiler fixed support, the width of the blade fan does not exceed the tire section width, and the blade fan The height does not exceed the tire section height.

The number of spoiler blades should be an odd number not less than 3.

The fixed support of the spoiler is a cassette structure, and the two ends of the cassette are respectively processed with claws and buckles, and the claws are inserted into the buckles so that the cassette forms a circular structure.

The angle between the groove direction and the width direction of the rim is less than 30 degrees.

The beneficial effect of the present invention is that the structure is simple, and on the premise of not changing the structure of the tire, by adding spoiler blades in the tire and rim assembly, the vibration mode of the tire cavity can be changed, and the vibration mode of the tire cavity can be reduced to reduce the occurrence of vibrations with the vehicle suspension system. Possibility of resonance, increased driving comfort and quietness. Simultaneously, the present invention is completely detachable, and can be disassembled and used repeatedly after tires and rims are replaced.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the structure of the spoiler of the present invention in the plane of symmetry of the tire.

Fig. 2 is a schematic structural view of the spoiler fixing support of the present invention.

Fig. 3 is a schematic diagram of the structure of the spoiler of the present invention in the cross section of the tire.

In the figure 1. Spoiler blade, 2. Spoiler fixed support, 2-1. Buckle, 2-2. Claw, 2-3. Catch groove, 3. Wheel rim, 4. Tire.

Detailed ways

In the figure, the present invention is provided with a rim 3, on which a spoiler fixing support 2 with the same width as the bottom of the rim groove is set, and on the spoiler fixing support 2, there are slots 2-3 with unequal intervals. , the slot 2-3 is fixed with a spoiler blade 1, in order to increase the supporting surface of the spoiler blade 1, the direction of the slot 2-3 has a certain angle with the width direction of the rim 3. The spoiler blade 1 is composed of a petiole and a blade fan. The petiole is used to connect the blade fan with the slot 2-3 of the spoiler fixed support 2. The width of the blade fan does not exceed the width of the tire section, and the height of the blade fan does not exceed the tire section. high. The leaf fan isolates the gas in the tire cavity, forming discontinuous air chambers with different lengths, and changing the vibration mode of the cavity. The number of spoiler blades 1 should be an odd number not less than 3, such as 3, 5, 7..., and the distribution spacing of spoiler blades 1 in the circumferential direction of rim 3 should be unequal, which is conducive to dispersing the resonance spectrum , avoiding single-frequency resonant modes. The spoiler fixed support 2 is a cassette type structure, and the two ends of the cassette are respectively processed with claws 2-2 and buckles 2-1, and the claws 2-2 are inserted into the buckles 2-1 to make the cassette form a circle. ring structure.

As shown in Fig. 1, Fig. 2 and Fig. 3, the spoiler blade 1 of the present invention is fixed in the slot 2-3 of the spoiler fixed support 2 by buckling, and the spoiler fixed support 2 is unfolded similarly After the waist belt and the spoiler fixing support 2 are wrapped around the bottom of the rim well, the claw 2-2 is passed through the buckle 2-1, and the spoiler fixing support 2 is manually tightened to fix it on the bottom of the rim well.

Spoiler blade 1 is made up of blade fan and petiole, and blade fan height H is the distance from the highest point of spoiler blade 1 to rim 3 and the diameter. Satisfy H=0.5Hs～0.7Hs, said Hs refers to the tire 4 design section height. The blade width W is the distance at the widest position of the blade. Satisfy W=0.7Ws～0.8Ws, Ws refers to the tire design section width.

The spoiler fixing support 2 is a cassette with several slots 2-3 at unequal intervals, and the claws 2-2 pass through the buckle 2-1 to form a ring structure. The cassette width Wb satisfies Wb=Wg, and Wg refers to the width of the bottom of the rim well. The length Lb of the cassette satisfies Lb=1.01*PI*Dg, PI is the circumference ratio, and Dg is the diameter of the bottom of the rim groove. There should be a certain angle Ab between the direction of the groove 2-3 and the width direction of the rim 3, satisfying Ab≤30°.

After the spoiler is installed in the tire 4, the gas in the tire cavity is divided into air columns with different lengths. During the rolling process of the tire 4, the gas in the cavity moves irregularly due to the obstruction of the spoiler blade 1, so as to avoid forming Fixed frequency vibration modes to reduce the possibility of resonance with the vehicle suspension.

The material of the spoiler should be a polymer material with a certain strength and flexibility, because when the tire passes through obstacles or complex road surfaces, the tire sinkage will change greatly, and there is a collision between the inner surface of the tire and the spoiler blade. possibility. The flexible material can prevent the blade from breaking when it hits, scratching the inner surface of the tire, and destroying the airtightness of the tire.

Claims (5)

1. a kind of Tire noise reducing flow spoiler is equipped with wheel rim, which is characterized in that be set on wheel rim identical with well width Flow spoiler hold-down support is distributed with not equidistant card slot on flow spoiler hold-down support, flow spoiler blade is fixed in card slot, blocks There is certain angle in slot direction with rim width direction.

2. Tire noise reducing flow spoiler according to claim 1, it is characterised in that the flow spoiler blade is fanned by petiole and leaf Composition, petiole is used to fan on leaf to be coupled with the card slot of flow spoiler hold-down support, and leaf fans width and is no more than deflected width of tyre, leaf fan Height is no more than tire section height.

3. Tire noise reducing flow spoiler according to claim 1, it is characterised in that the number of the stream device blade should be not small In 3 odd number.

4. Tire noise reducing flow spoiler according to claim 1, it is characterised in that the flow spoiler hold-down support is cassette The both ends of structure, cassette tape are machined with claw and buckle respectively, and claw, which is inserted into buckle, makes cassette tape form circular ring structure.

5. Tire noise reducing flow spoiler according to claim 1, it is characterised in that the card slot direction and rim width direction Angle be less than 30 degree.