Front windshield lower trim strip

Abstract

The present invention relates to the field of vehicle parts, and provides a front windshield lower trim strip, comprising: a trim strip, one end of which is provided with a profiled assembly cavity that comprises a first limiting arm, a second limiting arm and a mounting opening; a soft material limiting member fixed to the top of the first limiting arm and extending into the profiled assembly cavity from the mounting opening, wherein the soft material limiting member comprises a contraction section and a blocking head; a cover plate, the bottom of which is provided with a J-shaped member, wherein during the assembly of the cover plate and the trim strip, the J-shaped member pushes the blocking head of the soft material limiting member to move toward the inner wall of the first limiting arm, so that the J-shaped member easily enters the profiled assembly cavity for assembly, and when the cover plate and the trim strip are assembled in place, the top of the first limiting arm and the top of the second limiting arm accommodate the contraction section and the J-shaped member, and the blocking head and the portion of the J-shaped member located in the profiled assembly cavity form abutting blocking for the mounting opening, so that the J-shaped member is assembled in the profiled assembly cavity. In the present invention, the trim strip and the cover plate at the bottom of a front windshield of a vehicle are easily and stably mounted, and shock absorption and quietness are achieved during the traveling of the vehicle.

Description

A type of windshield retaining strip Technical Field

[0001] This invention relates to the field of vehicle accessories, and more particularly to a windshield under-mounted retaining strip. Background Technology

[0002] The windshield under-shield clip is manufactured using a plastic and aluminum strip extrusion process. It is mainly used on the lower side of the windshield of automobiles to assemble and fix the bottom of the windshield.

[0003] For example, patent document No. 200980118734.7 discloses a profile for connecting a car window glass to a water tank; however, the clips and the joint between them collide and generate noise during the car's operation.

[0004] For example, patent document with patent number 202010488980.X discloses a car air intake grille sealing strip with a soft hollow structure; however, it cannot guarantee that the glass can be easily installed in the strip.

[0005] For example, patent document with patent number DE102011056955 discloses a profile element for connecting glass components of stationary vehicles; however, it does not provide a flexible connector to dynamically buffer the vibration of the cover plate.

[0006] Therefore, how to achieve easy and stable installation of glass is a technical problem that needs to be solved. Summary of the Invention

[0007] Therefore, the present invention provides a front windshield retaining strip. By having a radial clearance space between the soft material limiting member and the irregular assembly cavity of the retaining strip, the J-shaped part of the cover plate can be easily installed by pushing the soft material limiting member into the clearance space. The soft material limiting member and the J-shaped part together block the installation opening of the irregular assembly cavity, thereby achieving stable installation.

[0008] To achieve the above objectives, the present invention proposes a windshield under-stripping strip, comprising:

[0009] The card strip has a special-shaped assembly cavity at one end. The special-shaped assembly cavity includes a first limiting arm and a second limiting arm. The first limiting arm and the second limiting arm are spaced apart to form an installation opening. A front windshield is provided on the outer side of the outer wall of the first limiting arm.

[0010] A cover plate with a J-shaped component at its bottom, the J-shaped component extending from the mounting opening into the irregular assembly cavity to assemble the cover plate with the retaining strip at its bottom;

[0011] A soft material limiting component includes a fixing part, a shrinking section, and a sealing head. The fixing part is fixed to the top of the first limiting arm. The shrinking section passes through the mounting opening. The sealing head is disposed in the irregular assembly cavity. There is a gap between the sealing head and the inner wall of the first limiting arm, so that during the assembly of the cover plate and the locking strip, the J-shaped component pushes the sealing head to move towards the inner wall of the first limiting arm.

[0012] When the cover plate and the locking strip are assembled in place, the tops of the first limiting arm and the second limiting arm clamp the shrink section and the J-shaped piece. The curved part of the J-shaped piece abuts against the sealing head. The total projected area of ​​the curved part and the sealing head toward the mounting opening is greater than the cross-sectional area of ​​the mounting opening, forming an abutment and sealing of the mounting opening, so as to fix the J-shaped piece in the irregular assembly cavity.

[0013] Furthermore, the curvature value of the contraction section and the thickness value of the sealing head are matched to concentrate the equivalent stress on the soft material limiting member in the sealing head, which is determined by the response surface model and stress distribution cloud map.

[0014] Furthermore, the sealing head is made of rubber or TPE material;

[0015] The stress distribution cloud map is a finite element modeling model that describes the deformation rate of the plug head using a hyperelastic constitutive model.

[0016] The stress distribution cloud map and the pressure applied by the response surface model represent the force exerted by the J-shaped component on the sealing head.

[0017] Furthermore, the line connecting the lowest point of the first limiting arm contacting the sealing head and the highest point of the curved portion abutting the sealing head is taken as the thickness of the sealing head, and the equivalent stress is concentrated and distributed within the range of the thickness.

[0018] In the above solution, by concentrating the equivalent stress on the sealing head rather than the contraction section, the vibration during vehicle operation is prevented from acting on the contraction section, which would cause structural fatigue, reduced structural strength, loss of control over the position of the sealing head, and cause the sealing head to move away from the installation port, thus resulting in assembly failure.

[0019] Furthermore, the sealing head has a through buffer hole to reduce its equivalent stress concentration effect.

[0020] Furthermore, the top of the first limiting arm has an inclined portion;

[0021] The inclined portion retracts from the top towards the mounting opening to fix the fixing portion.

[0022] Furthermore, the bottom end of the inclined portion and the sealing head have a mutually engaging structure.

[0023] The above solution achieves stable installation of the soft material limiting component.

[0024] Furthermore, the thickness of the fixing part is greater than the thickness of the sealing head. When the cover plate vibrates, it contacts the fixing part, causing the fixing part to slow down the vibration of the cover plate.

[0025] Furthermore, the outer side of the bottom wall of the irregular assembly cavity is provided with a strip-shaped, soft material buffer portion, which covers the bottom surface of the bottom wall.

[0026] Furthermore, the outer side of the bottom wall of the irregular assembly cavity is provided with strip-shaped vertical rib structure.

[0027] Furthermore, the shrinkage section is fixed in contact with or spaced apart from the inner side of the mounting opening;

[0028] The bottom wall of the irregular assembly cavity and the second limiting arm have a connected first metal frame, and the inclined part has a second metal frame. Both the first metal frame and the second metal frame are covered.

[0029] Furthermore, the soft material limiting member is integrally formed with the card strip.

[0030] Furthermore, the sealing head and the curved portion are provided with a snap-fit ​​structure that engages with each other.

[0031] Furthermore, the sealing head is provided with an abutment arm that abuts against the inner wall of the first limiting arm.

[0032] Furthermore, the second limiting arm protrudes into the mounting opening to form a protrusion, and the J-shaped part is recessed inward to form a mounting location. The shape fitting formula of the protrusion and the shape fitting formula of the mounting location are matched to make the volume of the recessed structure of the mounting location larger than the volume of the protrusion, thus forming a buffer cavity to buffer the vibration of the protrusion.

[0033] In the above solution, the impact of the cover plate's vibration on the J-shaped component is buffered by matching the shape fitting formula of the protrusion and the mounting location.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] 1. The radial clearance space between the soft material limiting component and the irregularly shaped assembly cavity of the retaining strip allows the J-shaped component of the cover plate to be easily installed by pushing the soft material limiting component into the clearance space. The soft material limiting component and the J-shaped component together block the installation opening of the irregularly shaped assembly cavity, thus achieving stable installation.

[0036] 2. By concentrating the equivalent stress on the sealing head rather than the contraction section, the vibration during vehicle operation is prevented from acting on the contraction section, which would cause structural fatigue, reduced structural strength, loss of control over the position of the sealing head, and cause the sealing head to move away from the installation port, thus resulting in assembly failure.

[0037] 3. By using various types of sealing heads, the installation is further stabilized, avoiding assembly failure caused by vibration.

[0038] 4. By matching the shape of the protrusion and the mounting point with the formula, the impact of the cover plate vibration on the J-shaped part is buffered. Attached Figure Description

[0039] Figure 1 is a schematic diagram of the structure of the first type of front windshield under-stripping according to an embodiment of the present invention;

[0040] Figure 2 is a schematic diagram of the stress distribution cloud map of a front windshield under-bracing strip according to an embodiment of the present invention;

[0041] Figure 3 is a schematic diagram of the response surface model of a front windshield under-strip according to an embodiment of the present invention;

[0042] Figure 4 is a detailed structural schematic diagram of an installation location and a protrusion according to an embodiment of the present invention;

[0043] Figure 5 is a schematic diagram of the assembly of the front windshield lower clip strip with the front windshield according to an embodiment of the present invention;

[0044] Figure 6 is a schematic diagram of the specific structure of the second type of front windshield lower clip according to an embodiment of the present invention;

[0045] Figure 7 is a schematic diagram of the specific structure of the third type of front windshield under-stripping according to an embodiment of the present invention;

[0046] Figure 8 is a schematic diagram of the specific structure of the fourth type of front windshield lower clip according to an embodiment of the present invention;

[0047] Figure 9 is a schematic diagram of the specific structure of the fifth type of front windshield lower clip according to an embodiment of the present invention;

[0048] Figure 10 is a schematic diagram of the specific structure of the sixth type of front windshield lower clip according to an embodiment of the present invention;

[0049] Figure 11 is a schematic diagram of the specific structure of the seventh type of front windshield under-stripping according to an embodiment of the present invention;

[0050] Figure 12 is a schematic diagram of the specific structure of the eighth type of front windshield lower clip according to an embodiment of the present invention;

[0051] Figure 13 is a schematic diagram of the specific structure of the ninth type of front windshield lower clip according to an embodiment of the present invention;

[0052] Figure 14 is a structural schematic diagram of a front windshield under-stripping reinforcement structure according to an embodiment of the present invention;

[0053] Figure 15 is a schematic diagram of the structure of the upright rib of another front windshield retaining strip according to another embodiment of the present invention.

[0054] In the diagram: 1. Cover plate; 11. J-shaped part; 111. Mounting point; 112. Bending part; 2. Locking strip; 21. Irregular assembly cavity; 211. Second limiting arm; 2111. Protrusion; 212. First limiting arm; 2121. Inclined part; 22. First metal frame; 23. Rib structure; 3. Soft material limiting part; 31. Fixing part; 32. Contraction section; 33. Sealing head; 331. Buffer hole; 332. Abutment arm; 333. Snap-fit ​​structure; 34. Connecting arm; 4. Buffer part; 5. Front windshield. Detailed Implementation

[0055] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0056] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0057] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0058] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] As shown in Figures 1 to 15, this invention provides a windshield retaining strip. A radial clearance space exists between the flexible material limiting member and the irregularly shaped assembly cavity of the retaining strip. This allows the J-shaped component of the car's windshield to be easily installed by pushing the flexible material limiting member into the clearance space. The flexible material limiting member and the J-shaped component together seal the installation opening of the irregularly shaped assembly cavity, achieving stable installation. The installation of the J-shaped component within the retaining strip provides a certain degree of buffering, improving the comfort and safety of the driver and passengers.

[0060] As shown in Figures 1 to 15, the present invention proposes a front windshield under-mount strip, comprising: a strip 2, one end of which is provided with a special-shaped assembly cavity 21, the special-shaped assembly cavity 21 including a first limiting arm 212 and a second limiting arm 211, the first limiting arm 212 and the second limiting arm 211 are spaced apart to form an installation opening, and a front windshield 5 is provided on the outer side of the outer wall of the first limiting arm 212;

[0061] The soft material limiting component 3 includes a fixing part 31, a shrinking section 32, and a sealing head 33. The fixing part 31 is fixed to the top of the first limiting arm 212. The shrinking section 32 passes through the installation opening. The sealing head 33 is disposed in the irregular assembly cavity 21 and has a space between it and the inner wall of the first limiting arm 212. During the assembly process of the cover plate 1 and the retaining strip 2, the J-shaped component 11 pushes the sealing head 33 of the soft material limiting component 3 to move towards the inner wall of the first limiting arm 212, so that the J-shaped component 11 can easily enter the irregular assembly cavity 21 for assembly.

[0062] The cover plate 1 has a J-shaped component 11 at its bottom. The J-shaped component 11 extends from the mounting opening into the irregular assembly cavity 21 to assemble the cover plate 1 with the retaining strip 2 at its bottom.

[0063] When the cover plate 1 and the clip 2 are assembled in place, the tops of the first limiting arm 212 and the second limiting arm 211 clamp the shrink section 32 and the J-shaped part 11. The bent portion 112 of the J-shaped part 11 abuts against the sealing head 33. The total projected area of ​​the bent portion 112 and the sealing head 33 toward the mounting opening is greater than the cross-sectional area of ​​the mounting opening, forming an abutment and sealing of the mounting opening, so that the J-shaped part 11 is fixedly assembled in the irregular assembly cavity 21.

[0064] Furthermore, the curvature value of the contraction section 32 and the thickness value of the sealing head 33 are matched to concentrate the equivalent stress on the soft material limiting member 3 on the sealing head 33, which is determined by the response surface model and stress distribution cloud map.

[0065] During the design and inspection phase of the soft material limiting component 3, a response surface model and stress distribution cloud map are generated to characterize the relationship between the curvature of the shrinkage section 32, the thickness of the sealing head 33, and the equivalent stress it is subjected to. Through the response surface model and stress distribution cloud map, the equivalent stress is concentrated in the sealing head 33, and the shrinkage section 32 will not accumulate structural fatigue and assembly failure.

[0066] Furthermore, the sealing head 33 is made of rubber or TPE material; the stress distribution cloud map is a finite element modeling model describing the deformation rate of the sealing head 33 through a hyperelastic constitutive model; the pressure applied by the stress distribution cloud map and the response surface model is the force exerted by the J-shaped component 11 on the sealing head 33.

[0067] Furthermore, the first limiting arm 212 contacts the lowest point of the sealing head 33, and the line connecting the first limiting arm 212 to the highest point of the sealing head 33 is taken as the thickness of the sealing head 33, and the equivalent stress is concentrated and distributed within the range of the thickness.

[0068] In the above solution, by concentrating the equivalent stress on the sealing head 33 instead of the contraction section 32, the vibration during vehicle operation is prevented from acting on the contraction section 32, which would cause structural fatigue, reduced structural strength, loss of control over the position of the sealing head 33, and cause the sealing head 33 to move away from the installation port, thus resulting in assembly failure.

[0069] Specifically, referring to Figure 2, the sealing head 33 is preferably made of TPE (thermoplastic elastomer). A third-order Ogden hyperelastic constitutive model is selected to describe its high nonlinearity, and the tensile and equivalent stress data of TPE are fitted. Based on the TPE formulation of the sealing head 33, its Poisson's ratio is set to 0.4. A J-shaped component 11 is set, and a direct pressure method is used to apply pressure of 2.6 MPa to 3 MPa to the penalty function of the interaction between the sealing head 33 and the sealing head 33. This pressure represents the average force exerted on the bending portion 112 of the J-shaped component 11 during the vibration of the J-shaped component 11 driven by the cover plate 1 during vehicle operation. Considering the properties of rubber, a four-node bilinear axisymmetric quadrilateral element CAX4RH is selected, and a hybridization formula is chosen to reduce the integral. The mesh element shape is quadrilateral, and an advanced algorithm is used. During the simulation, the seed spacing is set to 0.3 mm, and the number of meshes is 1020.

[0070] More specifically, the strain energy formula for the third-order Ogden hyperelastic constitutive model is:

[0071] In the formula, based on the material elasticity test of the sealing head 33, it is determined that when k is 1, μ k ,α k The values ​​are 40.012 and 2.221 respectively; when k is 2, μk ,α k The values ​​are -12.332 and 5.504 respectively; when k is 3, μ k ,α k The values ​​are -26.071 and -1.668, respectively, where λ1 to λ3 represent the lateral elongation of the plug head 33. The response surface model shown in Figure 2 is then generated using the determined strain energy.

[0072] The curvature of the contraction section 32 is defined as the angle between the upper surface of the inclined portion 2121 and the upper surface of the sealing head. A response surface model, as shown in Figure 3, is established for the contact surface between the curved portion 112 and the sealing head 33. It can be seen that the greater the curvature and thickness, the greater the equivalent stress on the contact surface. A curvature range of 50 to 60 degrees and a thickness of 19 to 22 mm are selected, with an equivalent stress greater than 14 MPa. Stress distribution cloud diagrams, as shown in Figure 2, are established for each. Referring to Figure 3, it can be seen that the stress in the lateral thicknesses of 20 mm and 22 mm is mainly concentrated in the contraction section 32, while the stress in the 19 mm thickness is entirely concentrated in the sealing head 33. The possible reason for this is that as the thickness increases, the compression on the sealing head 33 increases, leading to severe deformation. Furthermore, due to the structural design, the lower half of the sealing head 33 experiences less stress, thus the stress is mainly concentrated in the upper half of the sealing head 33. Therefore, the thickness of the sealing head 33 is 18.1 mm to 19.9 mm, preferably 19 mm, and the curvature of the contraction section 32 is 51 degrees to 59 degrees, preferably 50 degrees. Within this range, the stress is concentrated in the sealing head 33 and close to the contact surface.

[0073] Furthermore, as shown in Figure 10, the sealing head 33 has a through buffer hole 331 to reduce its equivalent stress concentration effect. Specifically, the area of ​​the buffer hole is consistent with the area of ​​stress concentration shown in Figure 2, so that when the sealing head 33 is under force, it contracts into the buffer hole 331, reducing the shaking and impact on the first limiting arm 212 caused by stress concentration, thus reducing the noise generated.

[0074] Furthermore, the top of the first limiting arm 212 has an inclined portion 2121; the inclined portion 2121 retracts from the top end toward the mounting opening to fix the fixing portion 31.

[0075] Furthermore, the bottom end of the inclined portion 2121 and the sealing head 33 have a mutually engaging structure.

[0076] The above solution achieves stable installation of the soft material limiting component 3.

[0077] Furthermore, the thickness of the fixing part 31 is greater than the thickness of the sealing head 33. When the cover plate 1 vibrates, it contacts the fixing part 31, causing the fixing part 31 to reduce the vibration of the cover plate 1.

[0078] Furthermore, as shown in Figure 1, the outer side of the bottom wall of the irregular assembly cavity 21 is provided with a strip-shaped, soft material buffer part 4, which covers the bottom surface of the bottom wall.

[0079] It should be noted that the buffer part 4, as an additional layer of the card strip 2, can prevent external objects or the environment from damaging the bottom outer surface of the irregular assembly cavity 21 of the card strip 2, reduce the pressure caused by collision or friction, reduce the contact impact between the card strip 2 and surrounding objects, reduce discomfort, and provide a softer and more comfortable touch.

[0080] Furthermore, the outer side of the bottom wall of the irregular assembly cavity 21 is provided with a strip-shaped vertical rib structure.

[0081] Furthermore, the shrinkage section 32 is fixed in contact with or spaced from the inner side of the mounting opening; the bottom wall of the irregular assembly cavity 21 and the second limiting arm 211 have a connected first metal frame 22, and the inclined part 2121 has a second metal frame, both the first metal frame 22 and the second metal frame are covered.

[0082] Furthermore, the soft material limiting member 3 is integrally formed with the card strip 2.

[0083] Specifically, by integrally molding the strip-shaped component with the irregularly shaped assembly cavity 21 and the soft material limiting component 3, the structure of the retaining strip 2 is more stable and less prone to deformation and breakage. The smooth transition curved surfaces on the inner sides of the first limiting arm 212 and the second limiting arm 211 can reduce friction and collision, improve the smoothness of the retaining strip 2 and the stability of vehicle driving. The retaining strip 2 is provided with a vertical rib structure 23, which can better engage with the ventilation grille and prevent the retaining strip 2 from falling off. The design of the buffer part 4 increases the flexibility and buffering of the retaining strip 2, reduces the impact force during collision, and improves the comfort and safety of the occupants. The soft material limiting component 3 allows the irregularly shaped assembly cavity 21 to better adapt to the shape of the J-shaped component 11 and improves the buffering performance of the retaining strip 2. The free end of the second limiting arm 211 is provided with a protrusion, which better contacts the J-shaped component 11 and improves the stability of the retaining strip 2. The thickness of the second limiting arm 211 is variable, and the hardness and elasticity of the retaining strip 2 can be adjusted as needed to adapt to different windshields 5.

[0084] Furthermore, as shown in Figure 9, the sealing head 33 and the curved portion 112 are provided with a snap-fit ​​structure 333 that engages with each other.

[0085] Furthermore, as shown in Figure 11, the sealing head 33 is provided with an abutment arm 332 that abuts against the inner wall of the first limiting arm 212.

[0086] Furthermore, the second limiting arm 211 protrudes into the mounting opening to form a protrusion 2111, and the J-shaped member 11 is recessed inward to form a mounting location 111. The shape fitting formula of the protrusion 2111 is matched with the shape fitting formula of the mounting location 111, so that the volume of the recessed structure of the mounting location 111 is larger than the volume of the protrusion 2111, forming a buffer cavity to buffer the vibration of the protrusion 2111.

[0087] Specifically, as shown in Figure 4, the shape fitting formula for the protrusion 2111 is as follows: The y-axis is tangent to the upper side wall of the mounting location 111 of the J-shaped part 11, and the origin is located below the mounting location 111. The x-axis is perpendicular to the y-axis and the origin. The shape fitting formula of the protrusion 2111 is a hook-shaped function translated along the y-axis, where a, b, and c are set parameters. a determines the inclination of the side wall of the protrusion 2111, b determines the protrusion height of the protrusion 2111, and c determines the distance from the origin. a, b, and c are preferably 0.642, 0.771, and 5, respectively, so that the protrusion 2111 can have a certain structural strength while preventing the J-shaped part 11 from falling off. The parameter c can be adjusted according to the height of the second limiting arm 211. The hook-shaped function has the advantages of small side wall angle and easy fitting production, which can realize the stable snap-fit ​​installation of the protrusion 2111 and the mounting point 111, forming the protrusion 2111 as shown by line segment BC in Figure 4. Point B is the top of the protrusion 2111 extending into the mounting port, and point C is the bottom of the protrusion 2111 located in the irregular assembly cavity 21. The protrusion 2111 is set at the bottom of the inclined surface of the second limiting arm 211 inclined towards the irregular assembly cavity 21.

[0088] The shape fitting formula for the installation location 111 is ∑((xi-d) 2 +(yi-e) 2 -(ri) 2=0, that is, multiple arc functions with the same center but different radii are connected to form an arc, where d and e are the coordinates of the arc center. The coordinates are adjusted according to the length of the J-shaped part 11 to determine the specific position of the mounting point 111 on the J-shaped part 11 and the length of the J-shaped part 11 extending into the irregular assembly cavity 21. The radius ri is determined using the least squares method. Ignoring the influence of positive and negative values, the square of the radius ri is used as the objective function for program optimization. The result is that rimin ≤ 0.1d, where d is the maximum distance of 5mm between the two side walls of the protrusion 2111, forming the mounting point 111 shown by line segment DE in Figure 4. Point E is the bottom end of the J-shaped part 11 extending into the mounting opening, and point D is the top end of the J-shaped part 11 located in the irregular assembly cavity 21. The mounting point 111 is set at the area of ​​the J-shaped part 11 corresponding to the junction of the mounting opening and the irregular assembly cavity 21. The thickness of the J-shaped part 11 at the upper part of the mounting point 111 is less than the thickness of the J-shaped part 11 at the lower part of the mounting point 111, so that the upper part of the mounting point 111 can easily pass through the mounting opening, while the lower part is less likely to be shaken out of the mounting opening when entering the irregular assembly cavity 21.

[0089] In the above solution, the vibration of the cover plate 1 on the J-shaped part 11 is buffered by the shape fitting formula of the protrusion 2111 and the mounting part 111.

[0090] Specifically, since the soft material limiting component 3 is preferably made of rubber, its molding shape can be adjusted simply by changing the shape of the combination mold during its production process. It can be understood that the shape of the soft material limiting component 3 shown in Figure 1 is the basic shape for production by the combination mold. By adding or removing the fixing strips in the combination mold, the shapes shown in Figures 7 to 11 can be produced.

[0091] Specifically, as shown in Figure 5, the fixing part 31 of the flexible material limiting member 3 is triangular, with its longest inclined side completely covering the inclined part 2121. The long inclined side wraps around the rounded corner of the top of the inclined part 2121 for fixation, that is, it extends beyond the top of the inclined part 2121, forming an interference fit with the lower windshield 5 that abuts against the other side of the inclined part 2121. It can be understood that since the flexible material limiting member 3 made of rubber or TPE has a certain deformation, by setting its fixing part 31 as a triangle, it can be easily clamped and fixed by the windshield 5 and the cover plate 1 fixed on both sides, thereby making its setting stable.

[0092] Specifically, as shown in Figure 6, the sealing head 33 has a groove located at the bottom end of the snap-fit ​​inclined portion 2121. As shown in Figure 7, the sealing head is a trapezoid with a wider top and a narrower bottom. Its top is a wide plane that abuts against the bottom end of the inclined portion 2121, allowing for a certain degree of freedom of vertical movement and limitation. Its bottom is a narrow plane that abuts against the upward plane of the curved portion 112, also allowing for a certain degree of freedom of vertical movement and limitation. As shown in Figure 8, the plane of the sealing head 33 facing the first limiting arm 212 is an inclined plane that does not retract, thereby increasing the distance between it and the inner wall of the first limiting arm 212. This is suitable for situations where the cover plate 1 experiences severe vibration and has a large mass and strong force, further reducing the noise from the impact of the sealing head 33. As shown in Figures 12 and 13, the sealing head 33 seals the J-shaped part 11 on the upper side of the mounting port and abuts against the top end of the second limiting arm 211. The contraction section 32 is connected to the fixing part 31 through the connecting arm 34, and the connecting arm 34 forms an arc-shaped cover for the sealing J-shaped part 11. In Figure 13, the sealing head 33 and the top end of the second limiting arm 211 have an interference fit, and the elastic deformation of the sealing head 33 forms a stable fixation.

[0093] It should be noted that the structures in Figures 5 to 11, 14 and 15 can be set individually or in combination. For example, the sealing head has both a buffer hole 331 and an abutment arm 332.

[0094] In this embodiment, the flexible material limiting member 3 and the irregularly shaped assembly cavity 21 of the retaining strip 2 have a radial clearance space, making it easy to install the J-shaped member 11 of the cover plate 1 by pushing the flexible material limiting member 3 into the clearance space. The flexible material limiting member 3 and the J-shaped member 11 jointly seal the installation opening of the irregularly shaped assembly cavity 21, achieving stable installation. By concentrating the equivalent stress on the sealing head 33 instead of the contraction section 32, vibrations during vehicle operation are prevented from acting on the contraction section 32, which could lead to structural fatigue, reduced structural strength, and loss of control over the position of the sealing head 33, causing the sealing head 33 to move away from the installation opening and resulting in assembly failure. The various forms of the sealing head 33 further stabilize its installation and prevent assembly failure caused by vibration. The shape fitting formula of the protrusion 2111 and the installation point 111 is used to buffer the impact of the vibration of the cover plate 1 on the J-shaped member 11.

[0095] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0096] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A windshield under-shield retaining strip, characterized in that, include: The card strip (2) has a special-shaped assembly cavity (21) at one end. The two side walls of the special-shaped assembly cavity (21) are a first limiting arm (212) and a second limiting arm (211) respectively. The first limiting arm (212) and the second limiting arm (211) are spaced apart to form an installation opening. The cross-sectional area of ​​the installation opening is smaller than the cross-sectional area of ​​the special-shaped assembly cavity (21). A front windshield (5) is provided on the outer side of the outer wall of the first limiting arm (212). The cover plate (1) has a J-shaped part (11) at its bottom. The J-shaped part (11) extends from the mounting port into the irregular assembly cavity (21) to assemble the cover plate (1) with the retaining strip (2) at its bottom. The soft material limiting component (3) includes a fixing part (31), a shrinking section (32), and a sealing head (33); the fixing part (31) is fixed to the top of the first limiting arm (212); the shrinking section (32) passes through the mounting opening; the sealing head (33) is disposed in the irregular assembly cavity (21), and there is a gap between the sealing head (33) and the inner wall of the first limiting arm (212) so that during the assembly process of the cover plate (1) and the clip (2), the J-shaped component (11) pushes the sealing head (33) to move towards the inner wall of the first limiting arm (212); When the cover plate (1) and the clip (2) are assembled in place, the top of the first limiting arm (212) and the top of the second limiting arm (211) accommodate the shrink section (32) and the J-shaped piece (11). The bent part (112) of the J-shaped piece (11) abuts against the sealing head (33). The total projected area of ​​the bent part (112) and the sealing head (33) towards the mounting port is greater than the cross-sectional area of ​​the mounting port. The sealing head (33) abuts against the J-shaped piece (11) and the J-shaped piece (11) abuts against the second limiting arm (211) to form an abutment and seal against the mounting port, so that the J-shaped piece (11) is fixedly assembled in the irregular assembly cavity (21).

2. The windshield retaining strip according to claim 1, characterized in that, The curvature value of the contraction section (32) and the thickness value of the sealing head (33) are matched to concentrate the equivalent stress on the soft material limiting member (3) on the sealing head (33), which is determined by the response surface model and stress distribution cloud map.

3. The windshield retaining strip according to claim 2, characterized in that, The plugging head (33) is made of rubber or TPE material; The stress distribution cloud map is a finite element modeling model that describes the deformation rate of the plug head (33) using a hyperelastic constitutive model; The stress distribution cloud map and the pressure applied by the response surface model are the forces exerted by the J-shaped component (11) on the sealing head (33).

4. The windshield retaining strip according to claim 2, characterized in that, The first limiting arm (212) contacts the lowest point of the sealing head (33), and the line connecting the first limiting arm (212) to the highest point of the sealing head (33) is the thickness of the sealing head (33), and the equivalent stress is concentrated within the range of the thickness.

5. The windshield retaining strip according to claim 1, characterized in that, The plug head (33) has a through buffer hole (331) to reduce its equivalent stress concentration effect.

6. The windshield retaining strip according to claim 1, characterized in that, The top of the first limiting arm (212) has an inclined portion (2121); The inclined portion (2121) retracts from the top end toward the mounting opening to fix the fixing portion (31).

7. The windshield retaining strip according to claim 6, characterized in that, The bottom end of the inclined portion (2121) has a snap-fit ​​structure with the sealing head (33).

8. The windshield retaining strip according to claim 1, characterized in that, The thickness of the fixing part (31) is greater than the thickness of the sealing head (33). When the cover plate (1) vibrates, it contacts the fixing part (31), causing the fixing part (31) to slow down the vibration of the cover plate (1).

9. The windshield retaining strip according to claim 1, characterized in that, The outer side of the bottom wall of the irregular assembly cavity (21) is provided with a strip-shaped, soft material buffer part (4), which covers the bottom surface of the bottom wall.

10. The windshield retaining strip according to claim 1, characterized in that, The bottom wall of the irregular assembly cavity (21) is provided with a strip-shaped vertical rib structure (23).

11. The windshield retaining strip according to claim 6, characterized in that, The shrinkage section (32) is fixed in contact with or spaced out from the inside of the mounting port; The bottom wall of the irregular assembly cavity (21) and the second limiting arm (211) have a first metal frame (22) that are connected, and the inclined part (2121) has a second metal frame. Both the first metal frame (22) and the second metal frame are covered.

12. The windshield retaining strip according to claim 1, characterized in that, The soft material limiting component (3) and the card strip (2) are integrally formed.

13. The windshield retaining strip according to claim 1, characterized in that, The sealing head (33) and the curved part (112) are provided with a snap-fit ​​structure (333) that engages with each other.

14. The windshield retaining strip according to claim 1, characterized in that, The sealing head (33) is provided with an abutment arm (332) that abuts against the inner wall of the first limiting arm (212).

15. The windshield retaining strip according to claim 1, characterized in that, The second limiting arm (211) protrudes into the mounting opening to form a protrusion (2111), and the J-shaped part (11) is recessed inward to form a mounting location (111). The shape fitting formula of the protrusion (2111) is matched with the shape fitting formula of the mounting location (111).

16. The windshield retaining strip according to claim 15, characterized in that, The volume of the recessed structure at the mounting location (111) is made larger than the volume of the protrusion (2111) to form a buffer cavity that buffers the vibration of the protrusion (2111).

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