Engine cover seal structure

Abstract

The utility model relates to the technical field of engine decoration cover seal, specifically relates to a kind of engine decoration cover sealing structure, it is set between base and upper cover, including the first sealing strip being arranged in the upper cover bottom and the second sealing strip being arranged in the base top;The first sealing strip and the first sealing surface of base abut, form the first seal located outside;The second sealing strip and the second sealing surface of upper cover abut, form the second seal located inside;The longitudinal section of second sealing strip includes from top to bottom the abutment portion that abuts with second sealing surface, the connecting portion that connects base, and the clamping portion that clamps elastic support;The other end of the elastic support away from clamping portion connects the base, and the middle part of the elastic support away from base, and the sound insulation cavity is formed between the base, the utility model constitutes double seal structure, sealing effect is good, improves the sound insulation and heat insulation performance of engine decoration cover whole.

Description

Technical Field

[0001] This utility model relates to the field of engine decorative cover sealing technology, specifically to an engine decorative cover sealing structure. Background Technology

[0002] In the bus manufacturing industry, the engine cover is a key component separating the engine compartment from the passenger compartment, and its sealing performance directly affects the noise level, cleanliness, and passenger comfort inside the vehicle. Currently, the engine cover sealing structure commonly used in the industry is a single-seal strip design. This design has significant limitations: First, the reliability of a single sealing line is insufficient. Under conditions such as long-term vehicle operation vibration and component thermal expansion and contraction, the seal is prone to failure due to aging, wear, or installation tolerances, creating leakage points for noise and dust. Second, and more importantly, the traditional single-seal structure struggles to generate uniform and sustained sealing pressure across the entire closed surface, resulting in limited sealing effectiveness.

[0003] Therefore, there is an urgent need for an engine decorative cover sealing structure with superior sealing performance and more stable and reliable operation. Summary of the Invention

[0004] To address the common problems of unsatisfactory sound insulation and noise reduction effects and insufficient dust and water resistance in existing engine decorative covers, this utility model provides a sealing structure for engine decorative covers, forming a double sealing structure with good sealing effect, thereby improving the overall sound insulation and heat insulation performance of the engine decorative cover.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: An engine decorative cover sealing structure is disposed between a base and a top cover, including a first sealing strip disposed at the bottom of the top cover and a second sealing strip disposed at the top of the base; The first sealing strip abuts against the first sealing surface of the base to form the first seal on the outer side; The second sealing strip abuts against the second sealing surface of the upper cover, forming a second seal on the inner side. The longitudinal section of the second sealing strip, from top to bottom, includes an abutting portion that abuts against the second sealing surface, a connecting portion that connects to the base, and a clamping portion that clamps the elastic support member. The other end of the elastic support member, away from the clamping portion, is connected to the base, and the middle portion of the elastic support member, away from the base, forms a sound-insulating cavity with the base. This constructs a basic framework for a double seal, integrating the elastic support member into the second sealing strip, forming a composite structure that combines sealing, support, and sound insulation functions, thus improving sealing reliability and sound insulation / noise reduction effects.

[0006] Furthermore, the top of the abutment portion has a corner that protrudes outward. The shape of the corner facilitates line contact or small-area contact with the second sealing surface of the upper cover, resulting in high initial sealing pressure and rapid sealing response, effectively improving the immediacy and sealing effect of the second seal.

[0007] Furthermore, the first sealing strip engages with the upper cover. The top of the first sealing strip is inverted U-shaped, and its inner side is provided with engaging teeth. The bottom of the upper cover is provided with an installation groove that matches the engaging teeth. The connection is stable and reliable, assembly is simple, and displacement of the first sealing strip is prevented during use.

[0008] Furthermore, the second sealing strip engages with the base, and the connecting portion has a U-shaped structure with the opening facing outwards, and engaging teeth are provided on its inner side. The edge of the base extends into the connecting portion. Mechanical interlocking is achieved through the U-shaped structure and engaging teeth, resulting in a secure connection that resists vibrations during vehicle operation and ensures a durable and effective seal.

[0009] Furthermore, the first sealing surface is an outwardly convex arc-shaped surface, while the second sealing surface is a horizontal surface. The first sealing surface facilitates the guidance and smooth compression of the first sealing strip when the top cover is closed; the second sealing surface facilitates the formation of a uniform and stable sealing contact with the abutment portion of the second sealing strip, thus optimizing the sealing performance.

[0010] Furthermore, the elastic support is made of a porous elastic material. The porous elastic material provides sound and heat insulation properties to the elastic support.

[0011] Furthermore, the longitudinal section of the elastic support is arc-shaped. This provides elastic support and naturally forms a sound-insulating cavity, enhancing sealing stability and sound insulation effect.

[0012] Furthermore, the clamping part has a U-shaped or C-shaped structure with the opening facing outwards. The clamping part is used to hold the elastic support member tightly and prevent it from loosening.

[0013] The beneficial effects of this utility model through the above technical solution are as follows: This utility model provides a first sealing strip and a second sealing strip between the base and the top cover. The first and second sealing strips are easy to install, forming two tight sealing lines inside and out, which improves the sealing reliability, effectively blocks the intrusion of engine noise and dust, and the double sealing structure provides redundancy protection. Even if one seal fails slightly, the other seal can still maintain the basic sealing effect, thus improving the robustness of the system.

[0014] The second sealing strip of this utility model integrates a special cross-sectional structure consisting of an abutment part, a connecting part, and a clamping part. The clamping part fixes the elastic support member, and a sound-insulating cavity is formed between the middle part of the elastic support member and the base. This not only provides excellent elastic support for the second sealing strip and ensures the stability of the sealing contact, but also significantly enhances the overall sound insulation and heat insulation performance by utilizing the cavity effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the engine decorative cover of this utility model; Figure 2 It is along Figure 1 Sectional view of line AA in the middle; Figure 3 This is a utility model Figure 2 Enlarged detail view of point B in the middle; The numbers in the attached diagram are as follows: 1 is the base, 2 is the top cover, 3 is the first sealing strip, 4 is the second sealing strip, 41 is the abutment part, 42 is the connecting part, 43 is the clamping part, and 5 is the elastic support. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-3 As shown, this embodiment provides an engine decorative cover sealing structure, which is disposed between a base 1 and an upper cover 2. The base 1 is fixed to the vehicle floor and surrounds the engine. The upper cover 2 is openable and closable on the base 1. In this embodiment, the upper cover 2 and the base 1 are connected by a fixed hinge.

[0017] The engine decorative cover sealing structure includes a first sealing strip 3 disposed at the bottom of the upper cover 2 and a second sealing strip 4 disposed at the top of the base 1. Both the first sealing strip 3 and the second sealing strip 4 are integrally manufactured from rubber material or thermoplastic elastomer with good elasticity and aging resistance through an extrusion molding process, which makes it easy to achieve different cross-sectional shapes required for the sealing strips and ensures good sealing performance and a long service life.

[0018] Specifically, the longitudinal section of the bottom edge of the upper cover 2 is approximately a right-angled triangle, with its right-angled side located on the inner side. A mounting groove is provided on the outer side of the base of the right-angled triangle, and a second sealing surface is formed on the inner side of the base of the right-angled triangle. This second sealing surface is horizontal. The first sealing strip 3 is snapped into the mounting groove. The top of the first sealing strip 3 is inverted U-shaped, and its inner side is provided with snap-fit ​​teeth. The mounting groove at the bottom of the upper cover 2 matches the snap-fit ​​teeth, and the inverted U-shaped structure of the first sealing strip 3 is snapped and fixed within the mounting groove, achieving a reliable connection between the first sealing strip 3 and the upper cover 2.

[0019] The edge of the base 1 extends upward and then inward, and the junction of the vertical and horizontal parts naturally forms the first sealing surface. The first sealing surface is an outwardly convex arc-shaped surface. When the upper cover 2 is closed, the bottom of the first sealing strip 3 abuts against the arc-shaped first sealing surface of the base 1 and undergoes compression deformation, thereby forming the first seal on the outside. This arc-shaped surface helps to guide and smoothly compress the first sealing strip 3 when the upper cover 2 is closed.

[0020] The second sealing strip 4 engages with the base 1 and is disposed on the horizontally extending inner edge of the base 1. The longitudinal section of the second sealing strip 4, from top to bottom, includes an abutment portion 41, a connecting portion 42, and a clamping portion 43. The connecting portion 42 is used to connect to the base 1 and has a U-shaped structure with an opening facing outwards. Its inner side is provided with engaging teeth. The horizontally extending edge of the base 1 is inserted into and engaged within the connecting portion 42 of the U-shaped structure, thus fixing the second sealing strip 4 to the base 1.

[0021] The abutment portion 41 is used to abut against the second sealing surface. The abutment portion 41 is located at the top of the second sealing strip 4. Preferably, the top of the abutment portion 41 has an outwardly sloping protruding corner. When the upper cover 2 is closed, the corner of the abutment portion 41 at the top of the second sealing strip 4 abuts against the second sealing surface at the bottom of the upper cover 2, forming a second seal on the inner side. This corner design facilitates line contact and improves the initial sealing pressure.

[0022] The clamping part 43 is used to clamp the elastic support member 5, and the clamping part 43 has a U-shaped or C-shaped structure with the opening facing outward. The elastic support member 5 is made of a porous elastic material, such as polyurethane foam or rubber foam. The longitudinal section of the elastic support member 5 is arc-shaped. The other end of the elastic support member 5 away from the clamping part 43 is connected to the inner sidewall of the vertical portion of the base 1. Because the elastic support member 5 is arc-shaped and its middle part is away from the base 1, a sound-insulating cavity is naturally formed between the elastic support member 5 and the sidewall of the base 1.

[0023] The working principle of this utility model: When the top cover 2 is closed, firstly, the first sealing strip 3 at the bottom of the top cover 2 presses against the first sealing surface at the top of the base 1, forming a reliable first seal. Simultaneously, the second sealing surface at the bottom of the top cover 2, located on the inner side, presses against the abutment portion 41 of the second sealing strip 4, and the two fit tightly together, forming a reliable second seal. During this process, the second sealing strip 4 transmits pressure to the elastic support member 5 through the clamping portion 43, causing the elastic support member 5 to undergo elastic deformation, providing support for the second sealing strip 4. The sound-insulating cavity formed by the elastic support member 5 and the base 1 effectively attenuates and absorbs noise and heat transmitted from the engine.

[0024] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A sealing structure for an engine decorative cover, disposed between a base (1) and a top cover (2), characterized in that, Includes a first sealing strip (3) disposed at the bottom of the upper cover (2) and a second sealing strip (4) disposed at the top of the base (1); The first sealing strip (3) abuts against the first sealing surface of the base (1) to form the first seal on the outside; The second sealing strip (4) abuts against the second sealing surface of the upper cover (2) to form a second seal on the inner side; the longitudinal section of the second sealing strip (4) includes, from top to bottom, an abutting part (41) abutting against the second sealing surface, a connecting part (42) connecting the base (1), and a clamping part (43) clamping the elastic support (5); the other end of the elastic support (5) away from the clamping part (43) is connected to the base (1), and the middle part of the elastic support (5) is away from the base (1) and forms a sound insulation cavity with the base (1).

2. The engine decorative cover sealing structure according to claim 1, characterized in that, The top of the abutment (41) has a corner that protrudes outward.

3. The engine decorative cover sealing structure according to claim 1, characterized in that, The first sealing strip (3) is snapped into the upper cover (2). The top of the first sealing strip (3) is inverted U-shaped and has snapping teeth on its inner side. The bottom of the upper cover (2) is provided with an installation groove that matches the snapping teeth.

4. The engine decorative cover sealing structure according to claim 1, characterized in that, The second sealing strip (4) is engaged with the base (1), the connecting part (42) has a U-shaped structure with the opening facing outward, and the inner side is provided with engaging teeth. The edge of the base (1) extends into the connecting part (42).

5. The engine decorative cover sealing structure according to claim 1, characterized in that, The first sealing surface is an outwardly convex arc-shaped surface, and the second sealing surface is a horizontal surface.

6. The engine decorative cover sealing structure according to claim 1, characterized in that, The elastic support (5) is made of porous elastic material.

7. The engine decorative cover sealing structure according to claim 1, characterized in that, The longitudinal section of the elastic support (5) is arc-shaped.

8. The sealing structure for an engine decorative cover according to claim 1, characterized in that, The clamping part (43) has a U-shaped or C-shaped structure with the opening facing outward.

Images