TECHNICAL FIELD

The application relates to the field of automobile sealing element, and particularly relates to an automobile air-inlet grille sealing strip with a soft hollow structure.

BACKGROUND

At present, the clamping strip structure is widely used in the connection of installation of automobile air-inlet grille and front windshield, and this structure can obtain a better appearance matching effect. The matching relationship between the traditional clamping strip structure and the surrounding parts is: the clamping strip is provided with a metal skeleton, the clamping foot of the air-inlet grille is clamped to the clamping strip through a barb of the clamping strip, and the clamping strip is bonded to the front windshield by adhesive tape.

In the prior art, the air-inlet grille connected by the clamping strip structure is easy to get out of the clamping strip structure, and the air-inlet grille and the barb of the clamping strip cannot be completely fitted. There will be a gap between the air-inlet grille and the clamping strip, which is prone to problems such as water leakage, noise, abnormal sound, etc.

SUMMARY

For this reason, the present application provides an automobile air-inlet grille sealing strip with a soft hollow structure, which solves the problems of large gap between the air-inlet grille and the front windshield, noise and abnormal sound in the prior art.

In order to achieve the above objective, the present application provides an automobile air-inlet grille sealing strip with a soft hollow structure, including: a clamping strip and a soft structure, the clamping strip comprises a strip-shaped member and a U-shaped groove; the strip-shaped member and the U-shaped groove are integrally formed; the U-shaped groove includes a curved arm, a first straight arm and a second straight arm; the first straight arm and the second straight arm are arranged at two ends of the curved arm respectively; an inner side of the second straight arm is provided with a relatively inclined smooth transitional curved surface, and the U-shaped groove extends outward along an opening direction of the second straight arm; the soft structure is provided at the inner side of the second straight arm, the soft structure is in a long strip shape, and the soft structure is provided with a through hole on a first end close to the curved arm;

the soft structure includes a first clamping foot contact part, a second clamping foot contact part, a smooth transition part and a grille contact part; a starting point of the first clamping foot contact part is A, a connection point of the first clamping foot contact part and the second clamping foot contact part is B, a connection point of the second clamping foot contact part and the smooth transition part is C, a connection point of the smooth transition part and the grille contact part is D, an end point of the grille contact part is E; cross-sections of the first clamping foot contact part, the second clamping foot contact part, and the grille contact part are all arc-shaped, and a cross-section of the smooth transition part is a straight line; the first clamping foot contact part is provided with a damping layer, and the second clamping foot contact part is provided with a wear-resistant layer.

Further, a curve formula of the first clamping foot contact part is

Y⁢1=a⁢0×ln⁢d⁢6d⁢3+sin⁡(α+dd⁢1)+x⁢0+y⁢0,
d6 is a contactable length between a clamping foot of the air-inlet grille and the soft structure, d3 is a width of the U-shaped groove, and α is an angle between a straight line formed by two end points of the first clamping foot contact part and a horizontal plane, and d is a thickness of the damping layer, d1 is a thickness of the air-inlet grille; a0 is a constant coefficient, and x0 and y0 are both constants; a curve formula of the second clamping foot contact part is

Y⁢2=log⁢d⁢4f⁢(d⁢3d⁢4+cos⁡(β+d⁢4f)+x⁢1+y⁢1,
d4 is a longest horizontal width of the clamping foot; f is a thickness of the wear-resistant layer; d3 is a width of the U-shaped groove; β is an angle between a straight line formed by two end points of the second clamping foot contact part and the horizontal plane, x1 and y1 are both constants; a straight line formula of the smooth transition part is

Y3=d1*x+k, d1 is a thickness of the air-inlet grille, x takes a value of 0.1-0.5, and k is a constant; a curve formula of the grille contact part is

Y⁢4=log⁢drd⁢1⁢(d⁢1d⁢5+p⁢1p⁢0),
dr is a straight-line distance between D and E, d1 is a thickness of the air-inlet grille, d5 is a width of the soft structure, p1 is an actual elastic modulus of a soft structure material, and p0 is a preset elastic modulus

Further, the wear-resistant layer is arranged on a first side of the first end, and the damping layer is arranged on a second side of the first end, and the second side and the first side are arranged opposite to each other.

Further, the automobile air-inlet grille sealing strip with a soft hollow structure further includes a first soft body; the first soft body is in along sheet shape and arranged on an outer side of the curved arm.

Further, the automobile air-inlet grille sealing strip with a soft hollow structure further includes a second soft body; the second soft body is in a semi-circular strip shape and arranged on a free end face of the first straight arm.

Further, the through hole is an elliptical through hole, and an angle between a plane on which a long axis of the through hole is located and the horizontal plane is 45°.

Further, a width of the first end of the soft structure is smaller than that of the second end.

Further, metal skeletons are provided in both the strip-shaped member and the U-shape d groove.

Further, the through hole is an elliptical through hole, and the wear-resistant layer and the damping layer are provided on two sides of a long axis of the through hole respectively.

Further, a material composition proportion of the wear-resistant layer: coating R400: curing agent XR-5580: water is 100:8.8.

Compared with the prior art, the beneficial effect of the present application is as follows. A soft structure with a long strip shape is provided at the inner side of the second straight arm, the soft structure is provided with a through hole on a first end close to the curved arm. When the clamping strip is inserted into the U-shaped groove, the clamping foot contacts with the second clamping foot contact part provided with the wear-resistant layer and slides into the U-shaped groove. At this time, the grille contact part of the soft structure contacts and fits the air-inlet grille, thereby realizing the elastic contact and fixation of the clamping foot in the U-shaped groove. Because of a soft contact of the soft material, when the soft material fills the gap between the clamping strip and the U-shaped groove, so that the sealing performance between the air-inlet grille and the clamping strip will be better under the filling action of the soft material. There will be no leak water and be not easy to produce abnormal sound and noise.

Further, the actual structures of the first clamping foot contact part, the second clamping foot contact part, the grille contact part and the smooth transition part in the soft structure are adjusted according to the actual thickness of the wear-resistant layer and the damping layer. Because the soft structure is easy to deform, the shape and curvature of the soft structure are more in line with the current application state of the clamping strip assembly, so as to achieve a better sealing effect. The hollow soft structure will present different forms according to different usage conditions to satisfy the sealing of the air-inlet grille and the front windshield.

