Self-tightening front compartment seal for vehicle

Abstract

The utility model discloses a kind of self-tight type front cabin sealing strips for vehicle, and the pressure side of sealing strip forms pressure-increasing surface, and the pressure-increasing surface is the inclined plane that is inclined from inside to outside towards cabin cover plate side;The utility model utilizes the self-tight effect generated by inclined plane, so that the high-speed airflow generated when the car is running at high speed compresses the sealing point of sealing strip and front cabin cover, and the higher the speed, the tighter the pressure between sealing strip and front cabin cover, to ensure that failure deformation does not occur under the impact of high-speed airflow, not only can achieve the purpose of basic sealing of dustproof and waterproof under high-speed condition, but also can ensure shock absorption, sound insulation and will not produce overwind noise under high-speed condition.

Description

Technical Field

[0001] This utility model relates to an automotive accessory component, and more particularly to a self-tightening front compartment sealing strip for automobiles. Background Technology

[0002] The front hood sealing strip in a car has multiple functions, mainly including sealing, shock absorption, noise reduction, and decoration. It seals the gap between the hood and the body, effectively preventing rainwater and dust from entering. At the same time, it also has a shock absorption function, reducing friction and wear between sheet metal parts, reducing internal noise transmission, and eliminating friction noise at the sealing point itself.

[0003] In existing technologies, different types of hood seam structures are used to meet the design requirements of the car's front compartment, resulting in numerous sealing issues in this area. The sealing strip structures typically used in this location are mainly inward-opening structures (flanged edges) and tubular structures (bubble tubes), with sealing primarily achieved through the stress of the sealing strip itself. During high-speed driving, the sealing strip can deform under the pressure of high-speed airflow, leading to seal failure and allowing sand, rain, and snow to enter the front compartment, while also generating wind noise. Even though existing technologies employ two-point sealing arranged front and rear to address this issue, since these are two points on the same sealing strip, deformation of the first sealing point can cause pulling and airflow forces to deform the second point as well, resulting in the aforementioned technical problems.

[0004] Therefore, it is necessary to improve the sealing strip of the car's front compartment for sealing, so as to ensure that it will not fail or deform under the impact of high-speed airflow. Thus, it can not only achieve the basic sealing purpose of dust and water protection under high-speed conditions, but also ensure shock absorption, sound insulation and no wind noise under high-speed conditions. Utility Model Content

[0005] In view of this, the present invention provides a self-tightening front compartment sealing strip for vehicles, used for sealing the front compartment, ensuring that it will not fail or deform under the impact of high-speed airflow. Therefore, it can not only achieve the basic sealing purpose of dust and water protection under high-speed conditions, but also ensure shock absorption, sound insulation and no wind noise under high-speed conditions.

[0006] The present invention relates to a self-tightening front compartment sealing strip for vehicles, which is installed between the engine compartment cover and the vehicle body. It has a connecting sealing end that seals with one of the engine compartment cover and the vehicle body and a contact sealing end that seals with the other of the engine compartment cover and the vehicle body when the engine compartment cover is closed. The pressure-facing side of the sealing strip forms a pressure-increasing surface, which is an inclined surface that slopes outward from inside the vehicle engine compartment toward the side where the contact sealing end is located.

[0007] Furthermore, the sealing strip is provided with a secondary pressure-increasing surface on the pressure-facing side, and the secondary pressure-increasing surface and the pressure-increasing surface form an approximate V-shaped angle.

[0008] Furthermore, the sealing end of the sealing strip has a first sealing point and a second sealing point formed sequentially in the direction from the outside to the inside of the vehicle engine compartment. After the engine compartment cover is closed, the first sealing point and the second sealing point make sealing contact with the engine compartment cover or the vehicle body.

[0009] Furthermore, the supercharging surface and the sub-supercharging surface are connected in an arc shape at one end towards the vehicle's engine compartment.

[0010] Furthermore, the pressurizing surface has a slightly concave arc in its transverse cross-section.

[0011] Furthermore, the secondary booster surface has a slightly convex arc or a straight line in its transverse cross-section.

[0012] Furthermore, the sealing strip has a tubular structure, the secondary pressurizing surface is approximately horizontally positioned, and the end of the secondary pressurizing surface in the pressure-facing direction is smoothly bent toward the side where the sealing end is located to form an air intake section.

[0013] Furthermore, the contact sealing end of the sealing strip is an outwardly convex arc-shaped surface, forming a first sealing point and a second sealing point in the direction from the outside to the inside of the vehicle engine compartment. After the engine compartment cover is closed, the first sealing point and the second sealing point are in sealed contact with the engine compartment cover or the vehicle body.

[0014] The first sealing point is located at or near the transition between the arc-shaped surface and the pressurized surface.

[0015] Furthermore, the sealing strip is an opening structure that opens into the vehicle's engine compartment, and the secondary pressurization surface is an inclined surface that slopes outward from inside the vehicle's engine compartment toward the side where the sealing end is located.

[0016] Furthermore, the contact sealing end of the sealing strip is an outwardly convex arc-shaped surface, forming a first sealing point and a second sealing point from the outside to the inside. After the engine compartment cover is closed, the first sealing point and the second sealing point are in sealed contact with the engine compartment cover or the vehicle body.

[0017] The first sealing point is located at or near the transition between the arc-shaped surface and the pressurized surface.

[0018] The beneficial effects of this utility model are as follows: The self-tightening front compartment sealing strip of this utility model has a pressure-increasing inclined surface formed on the pressure-facing side of the sealing strip, and this inclined surface slopes from the inside out towards the front cover, that is, it slopes upward. When the car is traveling at high speed, the airflow rushes towards this inclined surface, and the pressure formed will generate an upward partial pressure, thereby pressing the sealing point where the sealing strip contacts the front cover tightly, which has a self-tightening effect. Moreover, the higher the speed, the greater the pressure generated by the airflow, and the greater the partial pressure, the tighter the sealing strip is pressed against the front cover, ensuring that no failure or deformation will occur. Therefore, this utility model is used for front compartment sealing, ensuring that no failure or deformation will occur under the impact of high-speed airflow. It can not only achieve the basic sealing purpose of dust and water prevention under high-speed conditions, but also ensure shock absorption, sound insulation, and no wind noise under high-speed conditions. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 The cross-sectional structure of the sealing strip is a tubular structure;

[0021] Figure 2 A schematic diagram of a tubular sealing strip installed in a car.

[0022] Figure 3 The cross-sectional structure of the sealing strip with an open structure;

[0023] Figure 4 A schematic diagram of a sealing strip with an open structure installed in a car. Detailed Implementation

[0024] like Figures 1 to 2As shown: The self-tightening front compartment sealing strip of this embodiment generally includes a tubular structure (bubble tube) and an inwardly opening structure (flanged edge), which belongs to the existing structural classification and will not be described in detail here; In this embodiment, the tubular structure sealing strip is used as an example for explanation, and the set position b between the engine compartment cover a and the vehicle body (where the sealing strip 1 is located between the two to form a seal) also corresponds to the tubular structure sealing strip; The sealing strip 1 of this embodiment is installed between the engine compartment cover a and the set position b of the vehicle body, and has a connecting sealing end that connects and seals with one of the engine compartment cover a and the set position b of the vehicle body, and a contact sealing end that contacts the other seal between the engine compartment cover a and the set position b of the vehicle body when the engine compartment cover a is closed. A pressure-increasing surface 101 is formed on the pressure-facing side. The pressure-increasing surface 101 is an inclined surface that slopes outward from the front engine compartment towards the side where the contact sealing end is located. In this structure, "inner" refers to the interior of the engine compartment after the engine compartment cover a is closed (generally the front engine compartment cover). For the front of the front engine compartment of the vehicle, the inner and outer correspond to the rear and front, which will not be elaborated here. In actual use, the sealing strip 1 can be glued or sealed to a set position on the vehicle body or one of the engine compartment cover a through other mechanical connection structures, while the engine compartment cover a is in contact with the other one. In this embodiment, the sealing strip is sealed and connected (fixed) to the set position b of the vehicle body through the connecting sealing end, and when the engine compartment cover is closed, it is in contact with the engine compartment cover through the contact sealing end.

[0025] The sealing strip in this embodiment has a pressure-increasing surface that is inclined toward the side where the contact sealing end is located (in this embodiment, it is toward the side of the engine compartment cover a; in another structure, it is toward the side of the vehicle body at a set position b, which will not be described in detail here). Under the action of high-speed airflow, the pressure generated on the inclined surface will generate a partial pressure toward the engine compartment cover a in this embodiment (or toward the set position b of the vehicle body in another structure, which will not be described in detail here), thereby increasing the pressure of the sealing strip 1 on the engine compartment cover a, forming a self-tightening seal, effectively avoiding the deformation and collapse of the sealing surface caused by air resistance during high-speed driving of conventional structures; at the same time, it can also buffer the direct action of high-speed airflow, which is beneficial to protecting the sealing strip.

[0026] In this embodiment, as Figure 1 and Figure 2As shown, the sealing strip 1 also has a secondary pressure-boosting surface 102 on the pressure-facing side. The secondary pressure-boosting surface 102 is located on the opposite side of the boosting surface (i.e., the lower side, the side facing the vehicle body setting position b) and forms an approximate V-shaped angle with the boosting surface 101. An approximate V-shaped angle refers to a shape that is similar to a V, including a V-shape where both sides are straight to form a standard V-shape, or a V-shape where both sides or one side is slightly curved or deformed, and the lengths of the two sides of the V-shape are not necessarily equal. All of these can be considered as approximate V-shapes, which will not be elaborated further here. Normally, the sealing strip is fixed to the vehicle body at a set position b, which already forms a seal. The setting of the secondary pressure-generating surface makes the lower position of the pressure-facing side more forward, creating resistance to the high-speed airflow. This helps to guide the high-speed airflow entering the V-shaped interior to the pressure-generating surface, and makes the pressure generated by the high-speed airflow as much as possible towards the contact sealing end, i.e., the engine compartment cover a in this embodiment (in another structure, it is towards the set position b of the vehicle body, which will not be described in detail here). This further increases the proportion of the partial pressure, increases the sealing reaction force, and enhances the effect of the self-tightening seal.

[0027] Of course, the above structure also applies to sealing strip 2 with an open structure (a sealing strip with an opening into the vehicle's engine compartment), and the principle of creating a self-tightening seal is the same, such as... Figure 3 and Figure 4 As shown, the pressure-facing side of the sealing strip 2 is provided with a pressure-increasing surface 201, while the structure of the secondary pressure-increasing surface is suitable for sealing strips with open structures, such as... Figure 3 and Figure 4 As shown, the sealing strip 2 with an open structure has a secondary pressure-increasing surface on the opposite side of the pressure-increasing surface 201 on the pressure-facing side. The structural principle and the resulting technical effect are similar to those of the tubular structure, and will not be described in detail here. However, the sealing strip 2 with an open structure is applied between the engine compartment cover c and the designated position d of the vehicle body, which may be different from the structure of the engine compartment cover a and the designated position b of the vehicle body. This is a structural difference in the prior art and has no impact on the innovative solution of this utility model, and will not be described in detail here.

[0028] In this embodiment, as Figure 1 and Figure 2 As shown, the sealing end of the sealing strip 1 has a first sealing point 1031 and a second sealing point 1032 formed in the direction from the outside to the inside of the vehicle engine compartment, as... Figure 1 As shown, after the hood a is closed, the first sealing point 1031 and the second sealing point 1032 are in sealed contact with the hood a (in another structure, they are in sealed contact with a set position b on the vehicle body, which will not be described further here); Figure 2As shown, due to the presence of the pressurizing surface 101, the contact sealing end of the sealing strip 1 forms a self-tightening contact with the cabin cover a, thereby further pressing the outer first sealing point 1031 against the cabin cover a, preventing failure and deformation, and also ensuring that the second sealing point 1032 will not deform and has a certain degree of self-tightening effect, ultimately ensuring the sealing effect.

[0029] Of course, the above structure also applies to sealing strip 2 with an open structure, such as... Figure 3 and Figure 4 As shown, the sealing strip 2 forms the first sealing point 2031 and the second sealing point 2032. The structural principle and the resulting technical effect are similar to those of the tubular structure, and will not be described in detail here.

[0030] In this embodiment, the booster surface 101 and the auxiliary booster surface 102 are connected at one end in the direction from the outside to the inside of the vehicle engine compartment and transition in an arc shape, such as... Figure 1 and Figure 2 As shown, the pressure boosting surface 101 and the secondary pressure boosting surface 102 have an arc-shaped transition at the root of the V-shaped structure, which eliminates stress concentration and avoids damage from high-speed airflow impact; of course, the pressure boosting surface 201 and the secondary pressure boosting surface 202 of the sealing strip 2 with the open structure have the same transition structure, which will not be described in detail here.

[0031] In this embodiment, the pressure-boosting surface 101 has a slightly concave arc in its transverse cross-section, such as... Figure 1 and Figure 2 The term "micro-concave" refers to a small concave arc, which can be understood as being close to a straight line; this will not be elaborated further. The micro-concave arc makes it easier for the pressure-collecting surface to gather the wind pressure from the high-speed airflow, and directs the wind pressure closer to the hood a (in another structure, this is the vehicle body's designated position b, which will not be elaborated further), thus facilitating self-tightening while ensuring the sealing strip is not impacted by strong airflow. Of course, as... Figure 3 and Figure 4 As shown, the sealing strip 2 with the open structure also adopts a slightly concave arc shape for the pressure-increasing surface 201.

[0032] In this embodiment, as Figure 1 and Figure 2 As shown, the secondary pressurization surface 102 is a straight line in the transverse section and is approximately horizontal, which is suitable for the structural characteristics of the tubular structure with good overall support, that is, the four sides are closed and the force is shared. The flat secondary pressurization surface is conducive to forming a stable installation. Of course, the secondary pressurization surface 102 can also be slightly convex in the transverse section, which can guide the wind pressure in a favorable way.

[0033] like Figure 3 and Figure 4As shown, the secondary pressure-boosting surface 202 of the sealing strip 2 with the open structure has a slightly convex arc in the transverse cross section, which means that it has a small convex arc, which can be understood as being close to a straight line, and will not be elaborated here; this structure is conducive to guiding high-speed airflow toward the pressure-boosting surface 201, and will not be elaborated here.

[0034] In this embodiment, as Figure 1 and Figure 2 As shown, for the tubular sealing strip of this embodiment, the secondary pressurizing surface 102 is approximately horizontal, meaning it can be horizontal or slightly inclined, which will not be elaborated further here; and the end of the secondary pressurizing surface 102 on the pressure-facing side is smoothly bent toward the side where the set position b of the vehicle body is located (in this embodiment, the side facing the set position b of the vehicle body) to form the air intake portion 1021, as shown. Figure 1 and Figure 2 As shown, the air intake section 1021 is smoothly bent downwards at an angle of less than 90 degrees, which can directly guide the high-speed airflow to the pressurization surface 101 through the air intake section, and the air pressure entry angle is close to the contact sealing end, i.e., the nacelle cover plate a in this embodiment, to enhance the self-tightening effect.

[0035] In this embodiment, as Figure 1 and Figure 2 As shown, the contact sealing end of the sealing strip 1 is an outwardly convex arc-shaped surface 103 (in this embodiment, it faces the side of the engine compartment cover a; in another structure, it faces the set position b of the vehicle body). The first sealing point 1031 and the second sealing point 1032 are both located on the arc-shaped surface 103. Of course, after the engine compartment cover a is closed, the first sealing point 1031 and the second sealing point 1032 are in sealed contact with the engine compartment cover a (or the set position b of the vehicle body in another structure).

[0036] The first sealing point 1031 is located at or near the transition between the arc-shaped surface 103 and the pressure-increasing surface 101, such as... Figure 1 and Figure 2 As shown, the transition point refers to the corner between the arc-shaped surface 103 and the pressurizing surface 101. It is generally a smooth (generally arc-shaped) transition. The first sealing point 1031 is located at or near the transition point of the arc-shaped surface 103, so that the partial pressure generated by the high-speed airflow can act more directly on the first sealing point 1031 to achieve the best self-tightening effect.

[0037] Of course, such as Figure 3 and Figure 4As shown, the secondary pressure-boosting surface 202 of the sealing strip 2 with the open structure is an inclined surface that slopes outward from inside the vehicle engine compartment toward the side where the sealing end is located (in this embodiment, the opposite side of the engine compartment cover c). For the sealing strip 2 with the open structure, the side away from the pressure-facing side is the opening, which will result in a slightly weaker support strength. However, the present invention uses an inclined secondary pressure-boosting surface 202 with a slight convex arc, which is more conducive to guiding the high-speed airflow toward the engine compartment cover c to the pressure-boosting surface 201, further ensuring the self-tightening effect. This not only solves the problem of slightly weaker support strength at the opening, but also, combined with the two sealing points of this solution, further enhances the sealing strength.

[0038] Similarly, as Figure 3 and Figure 4 As shown, the contact sealing end of the sealing strip 2 in the open structure is an outwardly convex arc-shaped surface 203 (in this embodiment, it faces the engine compartment cover c; in another structure, it faces the set position d of the vehicle body). The first sealing point 2031 and the second sealing point 2032 are formed from the outside to the inside on the arc-shaped surface 203. Of course, after the engine compartment cover is closed, the first sealing point 2031 and the second sealing point 2032 are in sealed contact with the engine compartment cover c (or the set position d of the vehicle body in another structure).

[0039] The first sealing point 3031 is located near the transition between the arc-shaped surface 203 and the pressure-increasing surface 201. Structurally, it is consistent with the sealing strip 1 of the tubular structure. The structural description and effect will not be repeated here.

[0040] The above embodiments are illustrated using tubular sealing strip 1 and open sealing strip 2 as examples, with the sealing strips fixedly and sealed at a set position on the vehicle body and in sealing contact with the engine compartment cover. However, the design of the pressurizing surface and the secondary pressurizing surface of this utility model, combined with the setting of the sealing point, can be applied to other sealing strips and can be fixedly and sealed at a set position on the engine compartment cover and the vehicle body, and can achieve the corresponding technical effects, which will not be elaborated here.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A self-tightening front compartment sealing strip for vehicles, installed between the engine compartment hood and the vehicle body, and having a connecting sealing end that seals with one of the connections between the engine compartment hood and the vehicle body, and a contact sealing end that contacts the other seal between the engine compartment hood and the vehicle body when the engine compartment hood is closed, characterized in that: The pressure-facing side of the sealing strip forms a pressure-increasing surface, which is an inclined surface that slopes outward from inside the vehicle's engine compartment toward the side where the sealing end is located.

2. The self-tightening front compartment sealing strip for vehicles according to claim 1, characterized in that: The sealing strip is also provided with a secondary pressure-increasing surface on the pressure-facing side, and the secondary pressure-increasing surface and the pressure-increasing surface form an approximate V-shaped angle.

3. The self-tightening front compartment sealing strip for vehicles according to claim 1, characterized in that: The sealing end of the sealing strip has a first sealing point and a second sealing point formed sequentially in the direction from the outside to the inside of the vehicle compartment. After the compartment cover is closed, the first sealing point and the second sealing point make sealing contact with the compartment cover or the vehicle body.

4. The self-tightening front compartment sealing strip for vehicles according to claim 2, characterized in that: The supercharging surface and the sub-supercharging surface meet in an arc-shaped transition at one end toward the vehicle's engine compartment.

5. The self-tightening front compartment sealing strip for vehicles according to claim 1, characterized in that: The pressurizing surface has a slightly concave arc in its transverse cross-section.

6. The self-tightening front compartment sealing strip for vehicles according to claim 2, characterized in that: The secondary booster surface has a slightly convex arc or a straight line in its transverse cross-section.

7. The self-tightening front compartment sealing strip for vehicles according to claim 2, characterized in that: The sealing strip has a tubular structure, the secondary pressurizing surface is approximately horizontal, and the end of the secondary pressurizing surface in the pressure-facing direction is smoothly bent towards the side where the sealing end is located to form an air intake section.

8. The self-tightening front compartment sealing strip for vehicles according to claim 7, characterized in that: The sealing end of the sealing strip is an outwardly convex arc-shaped surface, and a first sealing point and a second sealing point are formed in the direction from the outside to the inside of the vehicle engine compartment. After the engine compartment cover is closed, the first sealing point and the second sealing point are in sealed contact with the engine compartment cover or the vehicle body. The first sealing point is located at or near the transition between the arc-shaped surface and the pressurized surface.

9. The self-tightening front compartment sealing strip for vehicles according to claim 2, characterized in that: The sealing strip is an opening structure that opens into the vehicle's engine compartment, and the secondary pressurization surface is an inclined surface that slopes outward from inside the vehicle's engine compartment toward the side where the sealing end is located.

10. The self-tightening front compartment sealing strip for vehicles according to claim 9, characterized in that: The sealing end of the sealing strip is a convex arc-shaped surface, and a first sealing point and a second sealing point are formed from the outside to the inside. After the engine compartment cover is closed, the first sealing point and the second sealing point are in sealing contact with the engine compartment cover or the vehicle body. The first sealing point is located at or near the transition between the arc-shaped surface and the pressurized surface.

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