Automobile door sealing strip

Abstract

The present invention belongs to the field of automotive sealing structures, and specifically discloses an automotive door sealing strip, which includes a clamping portion clamped with a card slot on the door sheet metal. One side of the clamping portion is provided with a deformation bladder that is in sealing contact with the body side wall sheet metal. The other side of the clamping portion is provided with a sealing lip for sealing the body side wall sheet metal and the door sheet metal. The sealing lip includes a connecting strip connected to the clamping portion. The sealing lip includes a first lip edge fixed on the connecting strip and a second lip edge fixed at one end of the connecting strip away from the clamping portion. The first lip edge is in sealing contact with the door sheet metal, and the second lip edge is in sealing contact with the body side wall sheet metal. The sealing lip further includes a third lip edge located between the first lip edge and the second lip edge. The third lip edge is fixed on the second lip edge, and the free end of the first lip edge is inclined towards the third lip edge. By adopting the solution of the present invention, the problem of poor sealing effect of the sealing lip in the existing structure can be solved.

Description

Technical Field

[0001] The present invention belongs to the field of automotive sealing structures, and particularly relates to an automotive door sealing strip. Background Art

[0002] Sealing strips are usually provided on an automotive body for body sealing. The sealing strip has the function of blocking water, air, noise, and dust from entering the passenger compartment. As Figure 1 shown, a door sealing strip generally includes a clamping portion 3 clamped with a card slot on a door sheet metal 1, a deformation bladder 4 in sealing contact with a body side wall sheet metal 2, and a sealing lip for sealing the body side wall sheet metal 2 and the door sheet metal 1. The sealing lip includes a first lip edge 7 in sealing contact with the door sheet metal 1 and a second lip edge 6 in sealing contact with the body side wall sheet metal 2. When opening and closing the door, the second lip edge 6 moves along with the body side wall sheet metal 2 and is always in contact with the body side wall sheet metal 2. In order to keep the first lip edge 7 in contact with the door sheet metal 1 all the time, that is, to prevent the first lip edge 7 from moving along with the body side wall sheet metal 2 (the second lip edge 6), a gap is usually provided between the first lip edge 7 and the second lip edge 6 to reduce mutual influence. However, with such a setting, the first lip edge 7 is usually difficult to fit well with the end of the door sheet metal 1 ( Figure 1 the upper arc of the door sheet metal 1 in ). When the sealing glue on the door sheet metal 1 is uneven or the water pressure outside the vehicle is too high, the water flow exerts pressure on the first lip edge 7, and the first lip edge 7 is likely to slide downward or form a gap with the door sheet metal 1, failing to achieve an ideal sealing state and unable to completely block the water flow outside the vehicle, and water will enter the vehicle body. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides an automotive door sealing strip to solve the problem that when the sealing glue on the door sheet metal is uneven or the water pressure outside the vehicle is too high, the water flow exerts pressure on the first lip edge, and the first lip edge is likely to slide downward or form a gap with the door sheet metal, failing to achieve an ideal sealing state and unable to completely block the water flow outside the vehicle, and water will enter the vehicle body.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] An automotive door sealing strip includes a clamping portion clamped with a card slot on a door sheet metal. One side of the clamping portion is provided with a deformation bladder in sealing contact with a body side wall sheet metal. The other side of the clamping portion is provided with a sealing lip for sealing the body side wall sheet metal and the door sheet metal. The sealing lip includes a connecting strip connected to the clamping portion. The sealing lip includes a first lip edge fixed on the connecting strip and a second lip edge fixed at one end of the connecting strip away from the clamping portion. The first lip edge is in sealing contact with the door sheet metal, and the second lip edge is in sealing contact with the body side wall sheet metal. The sealing lip further includes a third lip edge located between the first lip edge and the second lip edge. The third lip edge is fixed on the second lip edge, and the free end of the first lip edge is inclined towards the third lip edge.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] 1. A third lip edge is newly added and fixed to the second lip edge. When closing the door, the third lip edge and the second lip edge move together and are pressed against the vehicle body side wall sheet metal by the door sheet metal. Through the contact between the third lip edge and the door sheet metal, a first seal is formed, reducing the pressure of water flow on the first lip edge and alleviating the water sealing pressure of the first lip edge. At the same time, when the third lip edge contacts the door sheet metal, the contact force increases as the water pressure increases, that is, the sealing effect is better, so as to prevent water from entering the vehicle.

[0008] 2. The free end of the first lip edge is inclined towards the third lip edge. On the one hand, it has a supporting effect on the third lip edge, further enhancing the sealing effect of the third lip edge; on the other hand, when closing the door, the connecting strip is slightly pressed by the vehicle body side wall sheet metal, causing the first lip edge to further contact and press against the door sheet metal, enhancing the sealing effect between the first lip edge and the door sheet metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the sealing strip in the background art of the present invention.

[0010] Figure 2 It is a schematic diagram of the overall structure of the sealing strip in the open state of the door according to the embodiment of the present invention.

[0011] Figure 3 It is a schematic diagram of the overall structure of the sealing strip in the closed state of the door according to the embodiment of the present invention.

[0012] In the figure: 1. Door sheet metal; 2. Vehicle body side wall sheet metal; 3. Clamping portion; 4. Deformation bladder; 5. Connecting strip; 6. Second lip edge; 7. First lip edge; 8. Third lip edge; 9. Reinforcing portion. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be further described in detail below with reference to the accompanying drawings of the specification, and specific embodiments will be given.

[0014] As Figure 2 shown, the automobile door sealing strip includes a clamping portion 3 clamped with a card slot on the door sheet metal 1. One side of the clamping portion 3 is provided with a deformation bladder 4 that is hermetically abutted against the vehicle body side wall sheet metal 2. The other side of the clamping portion 3 is provided with a sealing lip for sealing the vehicle body side wall sheet metal 2 and the door sheet metal 1. The sealing lip includes a connecting strip 5 connected to the clamping portion 3. The sealing lip includes a first lip edge 7 fixed to the connecting strip 5 and a second lip edge 6 fixed to one end of the connecting strip 5 away from the clamping portion 3. The first lip edge 7 is hermetically abutted against the door sheet metal 1, and the second lip edge 6 is hermetically abutted against the vehicle body side wall sheet metal 2.

[0015] The sealing lip further includes a third lip 8 located between the first lip edge 7 and the second lip edge 6. The third lip 8 is fixed to the end of the second lip edge 6 close to the connecting strip 5. When the second lip edge 6 moves, it can drive the third lip 8 to move. An included angle within the range of 60° - 90° is formed between the second lip edge 6 and the third lip 8. A rounded transition is provided at the connection between the third lip 8 and the second lip edge 6. The larger the included angle (within the acute angle range) between the second lip edge 6 and the third lip 8, the more obvious the downward inclination of the free end of the third lip 8 when it is squeezed, and the better the fitting effect between the third lip 8 and the door sheet metal 1 when the third lip 8 is squeezed by the body side panel 2. However, when the included angle between the third lip 8 and the second lip edge 6 is an obtuse angle, it may cause the free end of the third lip 8 to incline downward too much, and it may be directly squeezed into the door sheet metal 1 when being squeezed, and thus cannot fit well with the end of the door sheet metal 1. Otherwise, the length of the third lip 8 needs to be set longer, which not only wastes materials but also, in the case of a longer length, the ability of the third lip 8 to be deformed under pressure is relatively large, which may lead to poor sealing.

[0016] The free end of the first lip edge 7 inclines towards the third lip 8, and the acute angle formed between the first lip edge 7 and the connecting strip 5 is 45° - 60°. The first lip edge 7 is inclined. On the one hand, when closing the door, the third lip 8 moves towards the first lip edge 7, and the first lip edge 7 has a supporting effect on the third lip 8, enhancing the sealing effect of the third lip 8. On the other hand, when closing the door, the connecting strip 5 is subjected to a certain extrusion by the body side panel 2, facilitating the first lip edge 7 to further fit against the door sheet metal 1 and enhancing the sealing effect between the first lip edge 7 and the door sheet metal 1. The extension lines of the first lip edge 7 and the second lip edge 6 are parallel or intersect to form an included angle less than 30°.

[0017] As Figure 3 shown, when closing the door, the deformation bladder 4 is squeezed and deformed to abut against the body side panel 2. The second lip edge 6 is squeezed by the body side panel 2 and moves towards the door sheet metal 1. The third lip 8 and the second lip edge 6 move together and are abutted against the door sheet metal 1 under the extrusion force of the body side panel 2. Through the abutment between the third lip 8 and the door sheet metal 1, the first seal is formed (the first lip edge 7 is the second seal), reducing the pressure of the water flow on the first lip edge 7 and alleviating the water sealing pressure of the first lip edge 7. At the same time, the third lip 8 abuts against the door sheet metal 1, and the force of abutting against the door sheet metal 1 increases with the increase of the water pressure, that is, the sealing effect is better, so as to prevent the water flow from entering the vehicle. In addition, the free end of the third lip 8 inclines downward, and when the water flow impacts the root of the third lip 8, it will also flow away along the surface of the third lip 8 instead of flowing into the vehicle body.

[0018] In another embodiment of the present invention, the thickness of the third lip 8 is smaller than the first lip 7 and the second lip 6. The third lip 8 has a smaller thickness and a stronger deformation ability when squeezed, and can better fit the door sheet metal 1 to enhance the sealing effect.

[0019] In another embodiment of the present invention, the lengths of the third lip 8, the second lip 6, and the first lip 7 decrease successively, and the third lip 8 has the largest length to ensure the fitting effect between the third lip 8 and the door sheet metal 1 when squeezed. In order to avoid the possibility that the third lip 8 is also deformed under pressure and may not be able to seal well, the length of the third lip 8 is 0.5 cm longer than the second lip 6.

[0020] In another embodiment of the present invention, a reinforcing portion 9 is fixed on the connecting strip 5 between the first lip edge 7 and the third lip edge 8, and the thickness of the reinforcing portion 9 increases along the direction from the third lip edge 8 to the first lip edge 7. Through the arrangement of the reinforcing portion 9, and the reinforcing effect of the reinforcing portion 9 on the first lip edge 7 is most obvious, when the second lip edge 6 moves with the body side sheet metal 2 to pull the connecting strip 5, it is more difficult for the connecting strip 5 to drive the first lip edge 7 to move, thereby better ensuring that the first lip edge 7 is always against the door sheet metal 1.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An automobile door sealing strip, comprising a clamping portion that is clamped with a card slot on the door sheet metal. One side of the clamping portion is provided with a deformation bladder that is in sealing contact with the body side wall sheet metal. The other side of the clamping portion is provided with a sealing lip for sealing the body side wall sheet metal and the door sheet metal. The sealing lip includes a connecting strip connected to the clamping portion. The sealing lip includes a first lip fixed on the connecting strip and a second lip fixed at one end of the connecting strip away from the clamping portion. The first lip is in sealing contact with the door sheet metal, and the second lip is in sealing contact with the body side wall sheet metal. It is characterized in that: The sealing lip further includes a third lip edge located between the first lip edge and the second lip edge. The third lip edge is fixed to the second lip edge, and the free end of the first lip edge is inclined towards the third lip edge; the third lip edge is fixed to the end of the second lip edge close to the connecting strip, and an included angle within the range of 60°-90° is formed between the second lip edge and the third lip edge; the thickness of the third lip edge is smaller than that of the first lip edge and the second lip edge, and the lengths of the third lip edge, the second lip edge, and the first lip edge decrease in sequence. The length of the third lip edge is 0.5 cm longer than that of the second lip edge; a reinforcing portion is fixed on the connecting strip between the first lip edge and the third lip edge, and the thickness of the reinforcing portion increases along the direction from the third lip edge to the first lip edge.

2. The automotive door sealing strip according to claim 1, wherein: The acute angle formed between the first lip edge and the connecting strip is 45°-60°, and an included angle less than 30° is formed by the extension lines of the first lip edge and the second lip edge being parallel or intersecting.

3. The automotive door sealing strip according to claim 1, characterized in that: A fillet transition is provided at the connection between the third lip edge and the second lip edge.

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