Commercial vehicle cab wind noise reduction method and commercial vehicle

Abstract

The invention relates to the technical field of vehicles, in particular to a wind noise reduction method for a cab of a commercial vehicle and the commercial vehicle. The wind noise reduction method for the cab of the commercial vehicle comprises the following steps that a wind shield is arranged on the upper edge of a front wall outer plate of the cab, and the wind shield is installed on a body in white; an A-pillar outer decorative plate is arranged on the outer side of an A pillar of the body in white, and the A-pillar outer decorative plate is used for guiding airflow, so that vortex airflow in the rearview mirror area is blown away; a top cover decoration strip is arranged in the circumferential direction of a top cover of the cab, a sealing piece is arranged between the top cover decoration strip and the lap joint part of the body in white, and the sealing piece blocks a gap between the top cover decoration strip and the body in white; a spoiler is arranged on the top cover, the spoiler and the top cover are sealed, and a flow guide groove is formed in the side, away from the top cover, of the spoiler so that wind resistance can be reduced. Wind noise of the cab can be reduced, the driving experience is improved, and the satisfaction degree of the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a method for reducing wind noise in a cab of a commercial vehicle and a commercial vehicle. Background Art

[0002] As the number of commercial vehicle users increases, the demand for commercial vehicles is getting higher and higher. In the process of use, users hope to have a quiet and comfortable driving environment under various working conditions. For commercial vehicles, the cab body is tall, and the wind noise generated by the airflow outside the car will affect the driving experience during driving. Therefore, the wind noise reduction design of the commercial vehicle cab is particularly important.

[0003] In the development of commercial vehicle cabs, the outer surface is streamlined to meet better aerodynamics, reduce wind resistance, and save fuel consumption. However, the external styling features and related functional components are more based on the matching design of exterior non-metallic parts. In this way, corresponding gaps and cavities will appear in the matching of exterior parts and white bodies. During driving, the airflow passes through the narrow gap and flows in the cavity, causing wind noise to be transmitted into the cab, giving users a poor experience, resulting in user complaints and low product satisfaction.

[0004] Therefore, a method for reducing wind noise in a commercial vehicle cab and a commercial vehicle are needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a method for reducing wind noise in a cab of a commercial vehicle and a commercial vehicle, which can reduce wind noise in the cab, improve driving experience, and improve vehicle satisfaction.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A method for reducing wind noise in a commercial vehicle cab comprises the following steps:

[0008] A windshield is arranged on the upper edge of the front outer panel of the cab, and the windshield is mounted on the body-in-white;

[0009] An A-pillar outer decorative panel is arranged on the outer side of the A-pillar of the body-in-white, and the A-pillar outer decorative panel is used to guide the airflow, so as to disperse the vortex airflow in the area of the rearview mirror;

[0010] A roof trim strip is arranged along the circumference of the roof of the cab, a sealing member is arranged between the overlapping portion of the roof trim strip and the body-in-white, and the sealing member blocks the gap between the roof trim strip and the body-in-white;

[0011] A spoiler is arranged on the top cover, the spoiler is sealed with the top cover, and a guide groove is arranged on a side of the spoiler away from the top cover to reduce wind resistance.

[0012] In some embodiments, the windshield is made of PP and EPDM materials and is manufactured by a two-shot injection molding process.

[0013] In some embodiments, the installation position where the windshield is connected to the body-in-white is made of PP material, and the overlapping part between the windshield and the upper edge of the front outer panel is made of EPDM material.

[0014] In some embodiments, the windshield is designed to have a left part, a middle part, and a right part, and there is no interference between the windshield and the movement of the wiper.

[0015] In some embodiments, a plurality of air guiding vanes are spacedly arranged on one side of the outer decorative panel of the A-pillar facing the A-pillar.

[0016] In some embodiments, the outer decorative panel of the A-pillar is made of ABS material, and the outer decorative panel of the A-pillar is connected to the A-pillar by screws.

[0017] In some embodiments, the outer surface of the outer decorative panel of the A-pillar is painted the same color as the outer surface of the cab.

[0018] In some embodiments, the seal is EPDM rubber sponge, and the seal adheres the roof trim strip to the roof by double-sided pressure-sensitive adhesive.

[0019] In some embodiments, the spoiler is made of UPGF material, and the outer side of the spoiler is painted on one side.

[0020] A commercial vehicle includes a chassis and a cab, the cab is disposed on the chassis, and the cab is designed by using the method for reducing wind noise of a commercial vehicle cab as described above.

[0021] Advantages of the present invention:

[0022] A method for reducing wind noise in a commercial vehicle cab provided by the present invention, wherein a wind deflector is provided along the upper edge of the front panel of the cab, and the wind deflector is installed on the body-in-white; an outer A-pillar decorative panel is provided on the outer side of the A-pillar of the body-in-white, and the outer A-pillar decorative panel is used for guiding the airflow; a seal is provided between the overlapping part of the roof trim and the body-in-white; a spoiler is provided on the roof, the spoiler is sealed with the roof, and a diversion groove is provided on the side of the spoiler facing away from the roof. By providing a wind deflector to tightly block the upper edge of the front panel to block the airflow and reduce wind noise. By adding an outer A-pillar decorative panel outside the A-pillar of the body-in-white, the airflow is guided, and the vortex airflow in the area of the rearview mirror is blown away, so as to improve the airflow direction and reduce wind noise. By providing a seal between the overlapping part of the roof trim and the body-in-white, the seal blocks the gap between the roof trim and the body-in-white, effectively blocking the airflow from entering and reducing wind noise. By sealing the spoiler with the roof and providing a diversion groove on the side of the spoiler facing away from the roof, the airflow direction is controlled, the aerodynamic performance is satisfied, and the structure is optimized, thereby reducing wind noise and wind resistance. By adopting the above method, the wind noise of the cab can be effectively reduced, the driving and riding experience can be improved, and the satisfaction of the vehicle can be improved.

[0023] A commercial vehicle provided by the present invention includes a chassis and a cab. The cab is designed by using the above method for reducing wind noise in a commercial vehicle cab, which can reduce the wind noise of the cab, improve the driving and riding experience, and improve the satisfaction of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0025] Figure 1 It is a schematic diagram of the cab in a method for reducing wind noise in a commercial vehicle cab of the present invention;

[0026] Figure 2 It is a schematic diagram of the wind deflector in a method for reducing wind noise in a commercial vehicle cab of the present invention;

[0027] Figure 3 It is a schematic diagram of the outer A-pillar decorative panel in a method for reducing wind noise in a commercial vehicle cab of the present invention;

[0028] Figure 4 It is a schematic diagram of the roof trim in a method for reducing wind noise in a commercial vehicle cab of the present invention;

[0029] Figure 5 It is a schematic diagram of the spoiler in a method for reducing wind noise in a commercial vehicle cab of the present invention.

[0030] In the figure:

[0031] 1. Cab; 11. Outer front panel; 12. Rearview mirror; 2. Windshield; 21. Left part; 22. Middle part; 23. Right part; 3. Outer decorative panel of A-pillar; 31. Air deflector vane; 4. Roof trim strip; 5. Spoiler; 51. Flow guide groove. Detailed implementation manners

[0032] Before explaining any implementation manner of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0033] In the present application, the terms "comprise", "include", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0034] In the present application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or can be indirect connection, combination, coupling or mounting. Among them, by way of example, direct connection means that two parts or components are connected together without the need to provide an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0035] In the present application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0036] In this application, the directional terms such as "upper", "lower", "left", "right", "front", and "back" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component. It should also be understood that the directional terms such as the upper side, the lower side, the left side, the right side, the front side, and the back side not only represent the positive direction, but can also be understood as the side direction. For example, the lower side can include directly below, lower left, lower right, lower front, and lower back, etc.

[0037] When designing and manufacturing the cab of a commercial vehicle, in order to reduce the wind noise of the cab, improve the driving and riding experience, and enhance the satisfaction of the vehicle, as Figures 1 - 5 shown, the present invention provides a method for reducing wind noise of a commercial vehicle cab. The method for reducing wind noise of a commercial vehicle cab includes the following steps:

[0038] A wind deflector 2 is arranged along the upper edge of the front panel outer panel 11 of the cab 1, and the wind deflector 2 is installed on the body-in-white.

[0039] An A-pillar outer decorative panel 3 is arranged on the outer side of the A-pillar of the body-in-white. The A-pillar outer decorative panel 3 is used to deflect the airflow, so as to disperse the vortex airflow in the area of the rearview mirror 12.

[0040] A roof decorative strip 4 is arranged circumferentially along the roof of the cab 1. A seal is arranged between the overlapping part of the roof decorative strip 4 and the body-in-white, and the seal blocks the gap between the roof decorative strip 4 and the body-in-white.

[0041] A spoiler 5 is arranged on the roof. The spoiler 5 is sealed with the roof, and a flow guiding groove 51 is arranged on the side of the spoiler 5 facing away from the roof to reduce wind resistance.

[0042] By arranging the wind deflector 2 to tightly block the upper edge of the front panel outer panel 11, air flow is blocked to reduce wind noise. By adding an A-pillar outer decorative panel 3 outside the A-pillar of the body-in-white, air flow guiding is realized, and the vortex airflow in the area of the rearview mirror 12 is blown away to improve the air flow direction and reduce wind noise. By arranging a seal between the overlapping part of the roof decorative strip 4 and the body-in-white, the seal blocks the gap between the roof decorative strip 4 and the body-in-white, effectively blocking the air flow from entering and reducing wind noise. By sealing the spoiler 5 with the roof and arranging a flow guiding groove 51 on the side of the spoiler 5 facing away from the roof, the air flow direction is controlled to meet the aerodynamic performance and the structure is optimized, thereby reducing wind noise and wind resistance. By adopting the above method, the wind noise of the cab 1 can be effectively reduced, the driving and riding experience can be improved, and the satisfaction of the vehicle can be enhanced.

[0043] During the styling development stage of the front outer panel 11, to meet the ventilation requirements of the whole vehicle's front part, the styling is mostly designed with large ventilation openings. During vehicle driving, a large amount of air flow will enter the front outer panel 11, and air flow convergence will occur at the upper edge of the front outer panel 11 and at the front windshield. When the air flow collides, a certain amount of wind noise will appear and be transmitted into the cab 1. Therefore, a windshield 2 is added to the upper edge of the front outer panel 11 to block the air flow and reduce wind noise.

[0044] In some embodiments, the windshield 2 is made of PP and EPDM materials and is manufactured by a two-shot injection molding process. Among them, PP is polypropylene, which is a thermoplastic synthetic resin with excellent properties. It has the characteristics of being non-toxic, odorless, having a small density, and having better strength, stiffness, hardness, and heat resistance than low-pressure polyethylene. EPDM is ethylene propylene diene monomer rubber, which is a copolymer of ethylene, propylene, and a small amount of non-conjugated diene. It has excellent ozone resistance, weather resistance, high temperature resistance, impact resistance, etc. By using the two-shot injection molding process for manufacturing, the advantages of both can be combined, and it is convenient for the manufacture of the windshield 2.

[0045] In some embodiments, the PP material is used at the installation position where the windshield 2 is connected to the body-in-white, and the EPDM material is used at the overlapping part between the windshield 2 and the upper edge of the front outer panel 11. Since the EPDM material has good flexibility, it can effectively conform to the upper edge of the curved shape of the front outer panel 11. The harder PP material is used at the installation position of the windshield 2 to facilitate the installation and fixation of the windshield 2.

[0046] In some embodiments, the windshield 2 is designed into a left part 21, a middle part 22, and a right part 23. Avoidance grooves exist between the left part 21 and the middle part 22 and between the middle part 22 and the right part 23. By setting the avoidance grooves, the movement of the windshield 2 and the wiper is not interfered. Through the above settings, it can be ensured that the windshield 2 does not affect the movement of the wiper, and while ensuring the movement gap, the gap at the upper edge of the front outer panel 11 is blocked as much as possible. Just like a "barrier", the air flow convergence is separated to reduce wind noise. In addition to effectively blocking the air flow, this windshield 2 can also play a role in rainproof sealing, reducing the rainwater entering from the upper edge of the front outer panel 11, and reducing the quality problems of the electrical components and air conditioning components inside the front outer panel 11 caused by rainwater. To ensure the structural strength of the windshield 2, in this embodiment, the windshield 2 is designed into a "T" shaped structure.

[0047] During vehicle driving, due to the shape of the rearview mirror 12 and the impact of the air flow from the front windshield A-pillar, air flow convergence occurs with the air flow around the rearview mirror 12, and air flow vortices will be generated at the rearview mirror 12 in the cab 1, thereby generating wind noise and being transmitted into the cab 1. Therefore, an A-pillar outer decorative panel 3 is added at the A-pillar of the body-in-white. Using the front air flow, the vortex air flow of the rearview mirror 12 is dispersed, improving the generation of wind noise at the rearview mirror 12 and reducing wind noise.

[0048] In some embodiments, a plurality of air guiding vanes 31 are arranged at intervals on one side of the outer decorative panel 3 of the A-pillar facing the A-pillar. By arranging the air guiding vanes, while improving the strength of the outer decorative panel 3 of the A-pillar, the air flow vortex in the rearview mirror 12 area can be further improved by controlling the air flow direction, and the vortex air flow is blown away from the cab 1, effectively reducing the wind noise.

[0049] In some embodiments, the outer decorative panel 3 of the A-pillar is made of ABS material, and the outer decorative panel 3 of the A-pillar is connected to the A-pillar by screws. The ABS material has good impact performance. The butadiene component provides low-temperature ductility and impact resistance, and can withstand a certain degree of external force impact without being easily damaged; moreover, it has the processing and forming characteristics of thermoplastic plastics. The outer decorative panel 3 of the A-pillar is made by injection molding process, which is convenient for manufacturing. By using the above installation method, it is convenient to install and fix the outer decorative panel 3 of the A-pillar on the A-pillar. In the design of the outer decorative panel 3 of the A-pillar, it meets the minimum design requirements of the driver's A-pillar obstacle angle and does not affect the driver's driving. While meeting multiple design requirements, the wind noise is reduced.

[0050] In some embodiments, the outer surface of the outer decorative panel 3 of the A-pillar is painted with the same color as the outer surface of the cab 1. By the above method, the consistency and aesthetics of the appearance of the cab 1 can be ensured.

[0051] The roof trim strip 4 is installed on the cab 1, and the roof trim strip 4 is an appearance shielding component at the welding edge of the roof and the side wall of the cab 1. When welding the white body, the welding edge of the roof and the side wall needs to meet the operation space of the welding fixture and the welding tongs. Therefore, after assembling the roof trim strip 4, a relatively large cavity will appear. When the vehicle is running, the air flow enters the cavity through the peripheral gap of the roof trim strip 4 and swirls in the cavity, generating a relatively large wind noise, which is transmitted into the cab 1. Therefore, adding a seal can effectively reduce the wind noise.

[0052] In some embodiments, the seal is EPDM rubber sponge, and the seal bonds the roof trim strip 4 to the roof through double-sided pressure-sensitive adhesive. The EPDM rubber sponge can not only meet the weather resistance requirements of the exterior decoration but also meet the sealing requirements. In this embodiment, the interference amount of the EPDM rubber sponge is 2 mm, which effectively squeezes and seals the gap between the roof trim strip 4 and the white body, reducing the wind noise. Moreover, by using double-sided pressure-sensitive adhesive for bonding and fixing, it is convenient for installation.

[0053] When the spoiler 5 provided on the roof is designed in the initial stage of styling, to increase the creativity of the appearance styling, the roof part often adds flow guiding and decorative components to improve the aesthetics of the appearance styling. Here, the air flow guiding often collides with the air flow at the top of the cab 1, generating a wind noise roar, which is transmitted into the cab 1. Therefore, sealing the spoiler 5 to the roof can effectively reduce the wind noise. Moreover, the spoiler 5 adding the flow guiding groove 51 structure can increase the body rigidity of the spoiler 5 and at the same time play a flow guiding function, reducing its aerodynamic wind resistance.

[0054] In some embodiments, the spoiler 5 is made of UPGF material, and the outer side of the spoiler 5 is painted on one side. UPGF is a glass fiber reinforced polyester resin material, which is a composite material with resin as the matrix material and reinforced with glass fiber. This material has good anti-aging performance and a normal service life of over 50 years, reducing the cost and trouble of frequent material replacement. Moreover, it is easy to manufacture and assemble. By painting on one side, the cost can be effectively reduced.

[0055] Through the above design method, the air flow direction outside the cab 1 is effectively improved and blocked, solving the problem of wind noise outside the cab 1 during high-speed driving (vehicle speed 80 km / h - 90 km / h), and improving the driving comfort of the occupants inside the cab 1.

[0056] This embodiment also provides a commercial vehicle, including a chassis and a cab 1. The cab 1 is arranged on the chassis, and the cab 1 of the commercial vehicle is designed by using the above method for reducing wind noise of the commercial vehicle cab, which can reduce the wind noise of the cab 1, improve the driving and riding experience, and enhance the satisfaction of the vehicle.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A method for reducing wind noise in a commercial vehicle cab, characterized in that, The steps include: A windshield (2) is arranged on the upper edge of the front outer panel (11) of the cab (1), and the windshield (2) is mounted on the body-in-white; An A-pillar outer decorative panel (3) is arranged on the outer side of the A-pillar of the body-in-white, and the A-pillar outer decorative panel (3) is used to guide the airflow, thereby dispersing the vortex airflow in the area of the rearview mirror (12); A roof decorative strip (4) is arranged along the circumference of the roof of the cab (1), a sealing member is arranged between the overlapping portion of the roof decorative strip (4) and the body-in-white, and the sealing member blocks the gap between the roof decorative strip (4) and the body-in-white; A spoiler (5) is arranged on the top cover, the spoiler (5) is sealed with the top cover, and a guide groove (51) is arranged on the side of the spoiler (5) facing away from the top cover to reduce wind resistance.

2. The method for reducing wind noise of a commercial vehicle cab according to claim 1, wherein The windshield (2) is made of PP and EPDM materials and is manufactured through a double-material injection molding process.

3. The method for reducing wind noise in a commercial vehicle cab according to claim 2, wherein The installation position where the windshield (2) is connected to the body-in-white is made of PP material, and the overlapping portion between the windshield (2) and the upper edge of the front outer panel (11) is made of EPDM material.

4. The method for reducing wind noise of a commercial vehicle cab according to claim 1, characterized in that, The windshield (2) is designed to be a left part (21), a middle part (22) and a right part (23), and the windshield (2) does not interfere with the movement of the wiper.

5. The method for reducing wind noise in a commercial vehicle cab according to claim 1, characterized in that, A plurality of air guide blades (31) are arranged at intervals on one side of the A-pillar outer decorative plate (3) facing the A-pillar.

6. The method for reducing wind noise in a commercial vehicle cab according to claim 1, wherein The A-pillar outer decorative panel (3) is made of ABS material, and the A-pillar outer decorative panel (3) is connected to the A-pillar via screws.

7. The method for reducing wind noise in a commercial vehicle cab according to claim 1, characterized in that, The outer surface of the A-pillar outer decorative panel (3) is painted in the same color as the outer surface of the cab (1).

8. The method for reducing wind noise in a commercial vehicle cab according to claim 1, characterized in that, The sealing member is an EPDM rubber sponge, and the sealing member adheres the top cover decorative strip (4) to the top cover via a double-sided pressure-sensitive adhesive.

9. The method for reducing wind noise of a commercial vehicle cab according to claim 1, wherein The spoiler (5) is made of UPGF material, and the outer side of the spoiler (5) is spray-painted on one side.

10. A commercial vehicle, characterized in that, The invention comprises a chassis and a cab (1), wherein the cab (1) is arranged on the chassis, and the cab (1) is designed using the commercial vehicle cab wind noise reduction method according to any one of claims 1 to 9.

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