A front windshield lower cross beam assembly, a vehicle front wall assembly and a vehicle

Abstract

The application discloses a front windshield lower cross beam assembly, a vehicle front wall assembly and a vehicle. A lower cross beam support frame is arranged in a cavity of the front windshield lower cross beam, and is used for abutting against the rear part of a motor mounting support, thereby providing support for the installation of the motor mounting support, improving the structural rigidity in the front-rear direction, and arranging a water flow groove fixing support and a vertical reinforcing beam on the left and right sides of the motor mounting support respectively, thereby playing a structural reinforcing role, dispersing the vibration of the wiper motor in multiple paths, without thickening the metal thickness of the front windshield lower cross beam, so that the vibration influence of the wiper motor can be effectively reduced, and the NVH performance of the vehicle is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle front wiper motor mounting bracket technology, and more particularly to a front windshield lower crossbeam assembly, a vehicle front bulkhead assembly, and a vehicle. Background Technology

[0002] NVH (Noise, Vibration, and Harshness) performance is crucial for automobiles, directly impacting ride comfort. The wiper system is a significant source of vibration excitation, with vibrations generated by its motor transmitted to the vehicle body via its mounting bracket. The front wiper motor mounting bracket is a key load-bearing component connecting the wiper motor to the vehicle body. The front wiper motor mounting bracket is installed on the lower crossbeam of the windshield. Current trends in automotive lightweighting have replaced traditional metal drainage channels with plastic ones, resulting in a cantilevered connection between the front wiper motor mounting bracket and the lower crossbeam of the windshield. This significantly reduces the dynamic stiffness of this area, making it difficult to effectively suppress and disperse the vibration energy of the wiper motor.

[0003] The existing mounting bracket structure for front wiper motors does not adequately optimize the force transmission path, allowing vibration energy to easily be transmitted to the vehicle body through a single weak point, lacking a multi-path load distribution design. Current technologies often employ thickened patches as a solution. For example, increasing the sheet metal thickness of the lower windshield crossbeam, while improving rigidity, directly increases the weight of the component, conflicting with the trend towards lightweight automotive manufacturing. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a front windshield lower crossbeam assembly, a vehicle front bulkhead assembly, and a vehicle. By setting a lower crossbeam support frame in the cavity of the front windshield lower crossbeam to support the rear of the motor mounting bracket, it provides support for the installation of the motor mounting bracket and improves the structural rigidity in the front-rear direction. A water channel fixing bracket and a vertical reinforcing beam are respectively set on the left and right sides of the motor mounting bracket to strengthen the structure. The vibration of the wiper motor is dispersed in multiple ways. Without increasing the sheet metal thickness of the front windshield lower crossbeam, the vibration impact of the wiper motor can be effectively reduced, thus improving the NVH performance of the vehicle.

[0005] The present invention provides a front windshield lower crossbeam assembly, including a front windshield lower crossbeam forming a cavity and a motor mounting bracket for mounting a front wiper motor;

[0006] The rear end of the motor mounting bracket is welded to the lower crossbeam of the windshield;

[0007] A lower crossbeam support frame is welded into the cavity. The lower crossbeam support frame extends along the front-rear direction in the cavity, and the front end of the lower crossbeam support frame abuts against the rear side of the rear end of the motor mounting bracket.

[0008] The front side of the lower crossbeam of the windshield is welded with a downwardly extending water channel fixing bracket and a vertical reinforcing beam, and the vertical reinforcing beam and the water channel fixing bracket are located on opposite sides of the motor mounting bracket.

[0009] In one of the alternative technical solutions, the motor mounting bracket includes a bracket top plate and two bracket side plates disposed on both sides of the bracket top plate, the two bracket side plates being connected to the bracket top plate in a U-shaped structure with the opening facing downwards;

[0010] The rear ends of the top plate of the bracket and the two side plates of the bracket are respectively welded to the lower crossbeam of the front windshield;

[0011] The top plate of the bracket is provided with a motor mounting boss and a main positioning hole. The motor mounting boss is provided with a secondary positioning hole, and the main positioning hole is located diagonally in front of the secondary positioning hole.

[0012] In one of the alternative technical solutions, the rear end of the bracket top plate is provided with an upwardly flipped and extended top plate welding flange, and the top plate welding flange is welded to the front windshield lower crossbeam;

[0013] The rear ends of the two bracket side plates are respectively provided with side plate welding flanges that flip and extend outward toward the outside of the bracket side plates, and the two side plate welding flanges are respectively welded to the lower crossbeam of the front windshield.

[0014] In one of the alternative technical solutions, the top plate of the bracket and the two side plates of the bracket are integrally formed, the welded flange of the top plate is integrally formed with the top plate of the bracket, and the welded flange of the side plate is integrally formed with the side plate of the bracket.

[0015] In one of the alternative technical solutions, a reinforcing structure is provided on the top plate of the bracket on the rear side of the motor mounting boss.

[0016] In one of the alternative technical solutions, the reinforcing structure includes multiple reinforcing ribs.

[0017] In one of the alternative technical solutions, along the width direction of the top plate of the bracket, the structural size of the reinforcing rib farther from the secondary positioning hole is larger than the structural size of the reinforcing rib closer to the secondary positioning hole.

[0018] In one of the alternative technical solutions, the lower crossbeam of the front windshield includes a lower crossbeam front plate, a lower crossbeam rear plate, and a lower crossbeam cover plate connected between the upper ends of the lower crossbeam front plate and the lower crossbeam rear plate;

[0019] The lower end of the lower crossbeam rear plate is welded to the lower end of the lower crossbeam front plate. The main body of the lower crossbeam rear plate gradually extends backward and upward. The cavity is formed between the lower crossbeam rear plate and the lower crossbeam front plate. The lower crossbeam cover plate covers the top of the cavity.

[0020] The rear end of the lower crossbeam support frame is welded to the rear plate of the lower crossbeam, and the front end of the lower crossbeam support frame is welded to the front plate of the lower crossbeam.

[0021] The rear end of the motor mounting bracket is welded to the front plate of the lower crossbeam and is located directly in front of the lower crossbeam support frame.

[0022] The vertical reinforcing beam and the water trough fixing bracket are respectively welded to the front plate of the lower crossbeam.

[0023] The present invention also provides a vehicle front bulkhead assembly, including a front baffle assembly and the front windshield lower crossbeam assembly described in any of the foregoing technical solutions;

[0024] The front baffle assembly includes a front baffle and a front baffle upper crossbeam welded to the front baffle;

[0025] The front baffle plate has a crossbeam with a vertical reinforcing bracket for welding to the vertical reinforcing beam;

[0026] The lower crossbeam of the front windshield is welded to the upper end of the front baffle, and the upper crossbeam of the front baffle is located below the lower crossbeam of the front windshield.

[0027] The vertical reinforcing bracket covers at least a portion of the vertical reinforcing beam, and the vertical reinforcing bracket is welded to the vertical reinforcing beam.

[0028] The present invention also provides a vehicle, including the vehicle front assembly described in the foregoing technical solution.

[0029] The above technical solution has the following beneficial effects:

[0030] The present invention provides a front windshield lower crossbeam assembly, a vehicle front bulkhead assembly, and a vehicle, including a front windshield lower crossbeam and a motor mounting bracket. The front windshield lower crossbeam has a cavity, in which a lower crossbeam support frame is installed. The rear end of the motor mounting bracket is welded to the front windshield lower crossbeam, and the rear end of the motor mounting bracket is located in front of the front end of the lower crossbeam support frame. The front end of the lower crossbeam support frame presses against the rear end of the motor mounting bracket, improving the rigidity of the motor mounting bracket in the longitudinal direction. A water channel fixing bracket and a vertical reinforcing beam are respectively arranged on the left and right sides of the motor mounting bracket. The water channel fixing bracket is used to connect and fix to the water channel, and the vertical reinforcing beam is used to connect and fix to the crossbeam on the front bumper, improving the structural rigidity around the motor mounting bracket and also allowing the vibration of the wiper motor to be transmitted in multiple paths.

[0031] In summary, the front windshield lower crossbeam assembly, vehicle front bulkhead assembly, and vehicle provided by this invention, by setting a lower crossbeam support frame in the cavity of the front windshield lower crossbeam to support the rear of the motor mounting bracket, provides support for the installation of the motor mounting bracket and improves the structural rigidity in the front-rear direction. Furthermore, by setting water channel fixing brackets and vertical reinforcing beams on the left and right sides of the motor mounting bracket, respectively, the structure is strengthened, and the vibration of the wiper motor is dispersed in multiple directions. This effectively reduces the vibration impact of the wiper motor without increasing the sheet metal thickness of the front windshield lower crossbeam, thereby improving the vehicle's NVH performance. Attached Figure Description

[0032] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0033] Figure 1 A perspective view of the lower crossbeam assembly of the front windshield provided in an embodiment of the present invention;

[0034] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0035] Figure 3 A schematic diagram showing the lower crossbeam supported in the cavity of the lower crossbeam of the front windshield;

[0036] Figure 4 for Figure 1 Cross-sectional view along the centerline of the motor mounting bracket;

[0037] Figure 5 A 3D view of the motor mounting bracket;

[0038] Figure 6 An exploded view of a vehicle front assembly provided in an embodiment of the present invention;

[0039] Figure 7 This is a 3D view of the crossbeam on the front bumper. Detailed Implementation

[0040] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0041] like Figure 1-5 As shown, an embodiment of the present invention provides a front windshield lower crossbeam assembly, including a front windshield lower crossbeam 1 forming a cavity 14 and a motor mounting bracket 2 for mounting a front wiper motor.

[0042] The rear end of the motor mounting bracket 2 is welded to the lower crossbeam 1 of the front windshield.

[0043] A lower crossbeam support frame 15 is welded into the cavity 14. The lower crossbeam support frame 15 extends along the front-back direction in the cavity 14, and the front end of the lower crossbeam support frame 15 rests on the rear side of the rear end of the motor mounting bracket 2.

[0044] A downward-extending water channel fixing bracket 3 and a vertical reinforcing beam 4 are welded to the front side of the lower crossbeam 1 of the windshield. The vertical reinforcing beam 4 and the water channel fixing bracket 3 are located on opposite sides of the motor mounting bracket 2.

[0045] The front windshield lower crossbeam assembly provided by the present invention includes a front windshield lower crossbeam 1, a motor mounting bracket 2, a water channel fixing bracket 3, and a vertical reinforcing beam 4, etc.

[0046] The lower crossbeam 1 of the windshield has a cavity 14, which is roughly triangular in shape, narrower at the bottom and wider at the top. This significantly improves the overall rigidity and stability of this area, and the cavity 14 also absorbs vibrations. A lower crossbeam support frame 15 is installed within the cavity 14. The front and rear ends of the lower crossbeam support frame 15 are welded to the front and rear sheet metal of the lower crossbeam 1, respectively. The front and rear ends of the lower crossbeam support frame 15 are each provided with multiple welded flanges. These flanges are welded to the front and rear sheet metal of the lower crossbeam 1, enhancing the connection's strength.

[0047] The motor mounting bracket 2 is used to mount the wiper motor and is a cantilever component set on the front side of the lower crossbeam 1 of the windshield. The rear end of the motor mounting bracket 2 is welded to the lower crossbeam 1 of the windshield, and the rear end of the motor mounting bracket 2 is located in front of the front end of the lower crossbeam support frame 15. The front end of the lower crossbeam support frame 15 supports the rear end of the motor mounting bracket 2, which improves the rigidity of the motor mounting bracket 2 in the front-rear direction and can transmit the vibration generated by the wiper motor, dispersing and transmitting the vibration.

[0048] The water channel fixing bracket 3 and the vertical reinforcing beam 4 are welded to the front side of the lower crossbeam 1 of the windshield and extend downwards. Both the water channel fixing bracket 3 and the vertical reinforcing beam 4 are sheet metal parts, and they are arranged on the left and right sides of the motor mounting bracket 2. The water channel fixing bracket 3 is used to provide mounting points for the plastic water channel to reinforce it. The vertical reinforcing beam 4 is used to weld and fix it to the vertical reinforcing bracket 521 on the crossbeam 52 on the lower front fender.

[0049] The arrangement of the water channel fixing bracket 3 and the vertical reinforcing beam 4 can improve the structural rigidity at the installation point of the motor mounting bracket 2, suppress vibration, optimize load distribution, avoid local stress concentration, and transmit the vibration generated by the wiper motor in a multi-path distributed transmission.

[0050] In summary, the front windshield lower crossbeam assembly provided by the present invention provides support for the installation of the motor mounting bracket 2 by setting a lower crossbeam support frame 15 in the cavity 14 of the front windshield lower crossbeam 1, which is used to support the rear of the motor mounting bracket 2 and improve the structural rigidity in the front and rear directions. The water channel fixing bracket 3 and the vertical reinforcing beam 4 are respectively set on the left and right sides of the motor mounting bracket 2 to strengthen the structure and disperse the vibration of the wiper motor in multiple ways. Without increasing the sheet metal thickness of the front windshield lower crossbeam 1, the vibration of the wiper motor can be effectively reduced, thus improving the NVH performance of the vehicle.

[0051] In one embodiment, such as Figure 2-5 As shown, the motor mounting bracket 2 includes a bracket top plate 21 and two bracket side plates 22 located on both sides of the bracket top plate 21. The two bracket side plates 22 are connected to the bracket top plate 21 in a U-shaped structure with the opening facing downwards.

[0052] The rear ends of the top plate 21 of the bracket and the two side plates 22 of the bracket are welded to the lower crossbeam 1 of the front windshield.

[0053] The top plate 21 of the bracket is provided with a motor mounting boss 212 and a main positioning hole 213. The motor mounting boss 212 is provided with a secondary positioning hole 2121, and the main positioning hole 213 is located diagonally in front of the secondary positioning hole 2121.

[0054] In this embodiment, the motor mounting bracket 2 mainly consists of a bracket top plate 21 and two bracket side plates 22. The two bracket side plates 22 are connected to both sides of the bracket top plate 21 and extend downwards, thereby forming a U-shaped structure with an opening facing downwards. The rear ends of the bracket top plate 21 and the two bracket side plates 22 are respectively welded to the lower crossbeam 1 of the front windshield. The rear end of the U-shaped structure is welded to the lower crossbeam 1 of the front windshield, forming a triangular support effect similar to "upward pull and downward support", which further enhances stability.

[0055] The bracket top plate 21 is used to mount the wiper motor. Its top surface has a motor mounting boss 212, which has a secondary positioning hole 2121 for positioning the wiper motor's mounting shaft. The secondary positioning hole 2121 is offset towards the outer side (right side) of the bracket top plate 21 to allow space for mounting components on the inner side (left side). The bracket top plate 21 has a main positioning hole 213 at its front left corner for positioning with the positioning pin in the front baffle assembly 5. The main positioning hole 213 is located diagonally in front of the secondary positioning hole 2121, rather than directly in front of it, increasing the distance between them and providing more clearance.

[0056] In one embodiment, such as Figure 5 As shown, the rear end of the bracket top plate 21 is provided with an upwardly flipped and extended top plate welding flange 211, which is welded to the front windshield lower crossbeam 1.

[0057] The rear ends of the two bracket side plates 22 are respectively provided with side plate welding flanges 221 that flip and extend outward toward the side plate 22. The two side plate welding flanges 221 are respectively welded to the lower crossbeam 1 of the front windshield.

[0058] In this embodiment, the rear end of the top plate 21 of the bracket is provided with a top plate welding flange 211, which extends upward from the rear end of the top plate 21 of the bracket. The rear end of the side plate 22 of the bracket is provided with a side plate welding flange 221, which extends outward from the rear end of the side plate 22 toward the outside of the side plate 22, where the outside refers to the side of the side plate 22 that is away from the U-shaped groove.

[0059] During welding, the top plate welding flange 211 and the two side plate welding flanges 221 are welded to the lower crossbeam 1 of the front windshield, forming a triangular support effect of "upward pull and downward support" where the top plate welding flange 211 pulls the bracket top plate 21 and the lower side plate welding flanges 221 support the bracket top plate 21. This improves the connection stability, and the large area of ​​the welding flanges makes welding easier and the weld more reliable.

[0060] In one embodiment, such as Figure 5 As shown, the top plate 21 of the bracket and the two side plates 22 of the bracket are integrally formed. The welded flange 211 of the top plate is integrally formed with the top plate 21 of the bracket, and the welded flange 221 of the side plate is integrally formed with the side plate 22 of the bracket.

[0061] In this embodiment, the entire motor mounting bracket 2 can be integrally stamped. Its bracket top plate 21 and two bracket side plates 22 are integrally stamped. The welding flange 211 of the top plate is integrally stamped from the rear end of the bracket top plate 21, and the welding flange 221 of the side plate is integrally stamped from the rear end of the bracket side plate 22. This improves the structural strength and stability of the motor mounting bracket 2, extends its service life, and can provide stable support for the wiper motor.

[0062] In one embodiment, the front end of the lower crossbeam support frame 15 is provided with three welded flanges, which are respectively configured to correspond to the welded flange 211 of the top plate and the welded flanges 221 of the two side plates, so as to stably support the motor mounting bracket 2.

[0063] In one embodiment, such as Figure 5 As shown, a reinforcing structure 214 is provided on the top plate 21 of the bracket behind the motor mounting boss 212, which further enhances the structural strength of the rear side of the motor mounting boss 212 and improves the bending and torsional stiffness of the key areas of the top plate 21 of the bracket. The reinforcing structure 214 can take the form of a rib, a reinforcing plate, or other structural forms.

[0064] In one embodiment, such as Figure 5As shown, the reinforcing structure 214 includes multiple reinforcing ribs 2141. In this embodiment, the reinforcing structure 214 is locally reinforced using reinforcing ribs 2141. The multiple reinforcing ribs 2141 are arranged at intervals along the left-right direction to improve the bending and torsional stiffness of the rear region of the support top plate 21.

[0065] In one embodiment, such as Figure 5 As shown, along the width direction of the top plate 21 of the bracket, the structural dimension of the reinforcing rib 2141 that is farther away from the secondary positioning hole 2121 is greater than the structural dimension of the reinforcing rib 2141 that is closer to the secondary positioning hole 2121.

[0066] Since the motor mounting boss 212 and the secondary positioning hole 2121 are located on the right side of the bracket top plate 21, the portion of the bracket top plate 21 with the motor mounting boss 212 on the right side is relatively close to the rear end of the bracket top plate 21, and is reinforced by the motor mounting boss 212. To ensure that the overall structural rigidity of the rear end portion of the bracket top plate 21 is approximately uniform, the thickness of the reinforcing rib 2141 is determined according to the distance between the reinforcing rib 2141 and the secondary positioning hole 2121. In this embodiment, the structural dimensions of the reinforcing rib 2141 mainly refer to its thickness.

[0067] The distance between the left-hand reinforcing rib 2141 and the secondary positioning hole 2121 is relatively large, and the area reinforced by the motor mounting boss 212 in this region is small. Therefore, the reinforcing rib 2141 in this region needs to be made relatively thick. The distance between the right-hand reinforcing rib 2141 and the secondary positioning hole 2121 is relatively small, and the area reinforced by the motor mounting boss 212 in this region is large. Therefore, the reinforcing rib 2141 in this region needs to be made relatively thin.

[0068] In one embodiment, such as Figure 1-4 As shown, the lower crossbeam 1 of the front windshield includes a lower crossbeam front plate 11, a lower crossbeam rear plate 12, and a lower crossbeam cover plate 13 connecting the upper ends of the lower crossbeam front plate 11 and the lower crossbeam rear plate 12.

[0069] The lower end of the lower crossbeam rear plate 12 is welded to the lower end of the lower crossbeam front plate 11. The main body of the lower crossbeam rear plate 12 gradually extends backward and upward. A cavity 14 is formed between the lower crossbeam rear plate 12 and the lower crossbeam front plate 11. The lower crossbeam cover plate 13 covers the top of the cavity 14.

[0070] The rear end of the lower crossbeam support frame 15 is welded to the rear plate 12 of the lower crossbeam, and the front end of the lower crossbeam support frame 15 is welded to the front plate 11 of the lower crossbeam.

[0071] The rear end of the motor mounting bracket 2 is welded to the front plate 11 of the lower crossbeam and is located directly in front of the lower crossbeam support frame 15.

[0072] The vertical reinforcing beam 4 and the water channel fixing bracket 3 are respectively welded to the front plate 11 of the lower crossbeam.

[0073] In this embodiment, the lower crossbeam 1 of the front windshield is mainly composed of the lower crossbeam front plate 11, the lower crossbeam rear plate 12 and the lower crossbeam cover plate 13.

[0074] The lower end of the front plate 11 of the lower crossbeam is slightly rearward, and its main body extends forward at an angle. The lower end of the rear plate 12 of the lower crossbeam is slightly forward, and its main body extends backward at an angle.

[0075] The lower end of the lower crossbeam rear plate 12 is welded to the lower end of the lower crossbeam front plate 11, and the lower crossbeam cover plate 13 is welded to the upper ends of the lower crossbeam rear plate 12 and the lower crossbeam front plate 11, thus forming a roughly triangular cavity 14 between the three.

[0076] If necessary, reinforcing plates may be provided on the front surface of the lower crossbeam rear plate 12 and / or the rear surface of the lower crossbeam front plate 11.

[0077] The motor mounting bracket 2, the vertical reinforcing beam 4, and the water channel fixing bracket 3 are respectively welded to the front plate 11 of the lower crossbeam.

[0078] The lower crossbeam support frame 15 is welded between the lower crossbeam rear plate 12 and the lower crossbeam front plate 11.

[0079] Therefore, the front end of the lower crossbeam support frame 15 and the rear end of the motor mounting bracket 2 are separated by the lower crossbeam front plate 11, forming a three-layer structure. The three layers are welded together, making it more stable.

[0080] like Figure 6-7 As shown, an embodiment of the present invention provides a vehicle front bulkhead assembly, including a front baffle assembly 5 and a front windshield lower crossbeam assembly as described in any of the preceding embodiments.

[0081] The front baffle assembly 5 includes a front baffle 51 and a front baffle upper crossbeam 52 welded to the front baffle 51.

[0082] The front baffle plate has a crossbeam 52 with a vertical reinforcing bracket 521 for welding with the vertical reinforcing beam 4.

[0083] The lower crossbeam 1 of the front windshield is welded to the upper end of the front baffle 51, and the upper crossbeam 52 of the front baffle is located below the lower crossbeam 1 of the front windshield.

[0084] The vertical reinforcing bracket 521 covers at least a portion of the vertical reinforcing beam 4, and the vertical reinforcing bracket 521 is welded to the vertical reinforcing beam 4.

[0085] The vehicle front assembly provided in this embodiment is part of the vehicle front, which includes the front fender assembly 5 and the front windshield lower crossbeam assembly.

[0086] For details regarding the structure, construction, and working principle of the lower windshield crossbeam assembly, please refer to the previous description of the lower windshield crossbeam assembly; it will not be repeated here.

[0087] The front baffle assembly 5 includes a front baffle 51 and a front baffle upper crossbeam 52, which is welded to the upper part of the front baffle 51. A vertical reinforcing bracket 521 is provided on the front baffle upper crossbeam 52 at a position corresponding to the vertical reinforcing beam 4, which extends upward and is used for welding to the vertical reinforcing beam 4.

[0088] During assembly, the lower windshield crossbeam 1 is welded to the upper end of the front baffle 51 and is positioned above the lower windshield crossbeam 1. The vertical reinforcing bracket 521 covers part or all of the vertical reinforcing beam 4. The vertical reinforcing bracket 521 is welded to the vertical reinforcing beam 4, which not only enhances the connection reliability but also transmits the vibration of the wiper motor to the front baffle assembly 5, thus helping to dissipate the vibration of the wiper motor.

[0089] If necessary, the bottom of the front fender upper crossbeam 52 can be welded to the top of the front windshield lower crossbeam 1.

[0090] If necessary, a clearance groove can be provided on the top of the crossbeam 52 on the front baffle to allow the motor mounting bracket 2 to pass.

[0091] For details on the layout of the water channels, please refer to the descriptions in the existing technology; they will not be repeated here.

[0092] One embodiment of the present invention provides a vehicle including the vehicle front assembly described in the foregoing embodiments.

[0093] The front windshield lower crossbeam assembly, vehicle front bulkhead assembly, and vehicle provided by this invention achieve an effective balance between lightweight and high rigidity, significantly improving the vehicle's NVH performance, specifically in the following ways:

[0094] 1. Significantly improved dynamic stiffness and vibration suppression:

[0095] Multi-path vibration dissipation: The cavity 14 structure of the lower crossbeam 1 of the windshield was optimized to make it a triangular cavity. Combined with multi-layer welded nodes and multi-directional force flow network, an efficient multi-path vibration transmission and dispersion mechanism was constructed, which significantly reduced the vibration energy concentration of a single weak link.

[0096] Reduced resonance risk: The increased stiffness of the wiper motor mounting point alters the structure's natural frequency, effectively avoiding the typical excitation frequency band of the wiper motor and reducing the risk of resonance.

[0097] The motor mounting bracket 2, the lower crossbeam support frame 15, and the lower crossbeam front plate 11 adopt a three-layer welded structure, which increases the Z-direction dynamic stiffness of the wiper motor mounting point from the original 961N / mm to 1139N / mm, an increase of about 18.5%.

[0098] The three-layer welded structure at key nodes greatly improves connection strength and fatigue life.

[0099] With the combination of three-layer welding and reinforcing ribs, even if the sheet metal thickness is reduced from 2.5mm to 2.0mm, its Z-direction dynamic stiffness can still reach 1190N / mm, far exceeding the target value of 1000N / mm, and achieving weight reduction of parts.

[0100] 2. Balance between lightweight and performance: The motor mounting bracket 2 is designed with a U-shaped structure with the opening facing downwards and adopts a non-uniformly distributed reinforcing rib design to improve local rigidity. This allows for a reduction in material usage while maintaining or even improving performance. The material thickness can be reduced from 2.5mm to 1.8mm, achieving significant weight reduction.

[0101] 3. Innovative structural design leads to improved reliability: The U-shaped design of the motor mounting bracket 2, combined with specific flanges and reinforcing ribs, significantly enhances the bending and torsional stiffness of the motor mounting bracket 2.

[0102] The coordinated design of each component optimizes the overall stiffness matching and load transfer, improving the system's reliability and durability under complex working conditions.

[0103] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0104] The above are merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. A front windshield lower crossbeam assembly, characterized in that, This includes the lower crossbeam of the windshield that forms a cavity and the motor mounting bracket for mounting the front wiper motor. The rear end of the motor mounting bracket is welded to the lower crossbeam of the windshield; A lower crossbeam support frame is welded into the cavity. The lower crossbeam support frame extends along the front-rear direction in the cavity, and the front end of the lower crossbeam support frame abuts against the rear side of the rear end of the motor mounting bracket. The front side of the lower crossbeam of the windshield is welded with a downwardly extending water channel fixing bracket and a vertical reinforcing beam, and the vertical reinforcing beam and the water channel fixing bracket are located on opposite sides of the motor mounting bracket.

2. The front windshield lower crossbeam assembly according to claim 1, characterized in that, The motor mounting bracket includes a bracket top plate and two bracket side plates disposed on both sides of the bracket top plate. The two bracket side plates are connected to the bracket top plate in a U-shaped structure with the opening facing downward. The rear ends of the top plate of the bracket and the two side plates of the bracket are respectively welded to the lower crossbeam of the front windshield; The top plate of the bracket is provided with a motor mounting boss and a main positioning hole. The motor mounting boss is provided with a secondary positioning hole, and the main positioning hole is located diagonally in front of the secondary positioning hole.

3. The front windshield lower crossbeam assembly according to claim 2, characterized in that, The rear end of the top plate of the bracket is provided with an upwardly flipped and extended welding flange, which is welded to the lower crossbeam of the front windshield. The rear ends of the two bracket side plates are respectively provided with side plate welding flanges that flip and extend outward toward the outside of the bracket side plates, and the two side plate welding flanges are respectively welded to the lower crossbeam of the front windshield.

4. The front windshield lower crossbeam assembly according to claim 3, characterized in that, The top plate of the bracket and the two side plates of the bracket are integrally formed. The welded flange of the top plate is integrally formed with the top plate of the bracket, and the welded flange of the side plate is integrally formed with the side plate of the bracket.

5. The front windshield lower crossbeam assembly according to claim 2, characterized in that, The top plate of the bracket is provided with a reinforcing structure on the rear side of the motor mounting boss.

6. The front windshield lower crossbeam assembly according to claim 5, characterized in that, The reinforcing structure includes multiple reinforcing ribs.

7. The front windshield lower crossbeam assembly according to claim 6, characterized in that, Along the width direction of the top plate of the bracket, the structural dimensions of the reinforcing ribs farther from the secondary positioning holes are larger than the structural dimensions of the reinforcing ribs closer to the secondary positioning holes.

8. The front windshield lower crossbeam assembly according to claim 1, characterized in that, The lower crossbeam of the windshield includes a lower crossbeam front plate, a lower crossbeam rear plate, and a lower crossbeam cover plate connecting the upper ends of the lower crossbeam front plate and the lower crossbeam rear plate; The lower end of the lower crossbeam rear plate is welded to the lower end of the lower crossbeam front plate. The main body of the lower crossbeam rear plate gradually extends backward and upward. The cavity is formed between the lower crossbeam rear plate and the lower crossbeam front plate. The lower crossbeam cover plate covers the top of the cavity. The rear end of the lower crossbeam support frame is welded to the rear plate of the lower crossbeam, and the front end of the lower crossbeam support frame is welded to the front plate of the lower crossbeam. The rear end of the motor mounting bracket is welded to the front plate of the lower crossbeam and is located directly in front of the lower crossbeam support frame. The vertical reinforcing beam and the water trough fixing bracket are respectively welded to the front plate of the lower crossbeam.

9. A vehicle front bulkhead assembly, characterized in that, Includes the front fender assembly and the lower windshield crossbeam assembly as described in any one of claims 1-8; The front baffle assembly includes a front baffle and a front baffle upper crossbeam welded to the front baffle; The front baffle plate has a crossbeam with a vertical reinforcing bracket for welding to the vertical reinforcing beam; The lower crossbeam of the front windshield is welded to the upper end of the front baffle, and the upper crossbeam of the front baffle is located below the lower crossbeam of the front windshield. The vertical reinforcing bracket covers at least a portion of the vertical reinforcing beam, and the vertical reinforcing bracket is welded to the vertical reinforcing beam.

10. A vehicle, characterized in that, Includes the vehicle front bulkhead assembly as described in claim 9.

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