Front windshield lower cross beam assembly, vehicle front wall assembly and vehicle

Abstract

According to the front windshield lower cross beam assembly, the vehicle front wall assembly and the vehicle, a lower cross beam supporting frame is arranged in a cavity of a front windshield lower cross beam and used for abutting against the rear portion of a motor installation support, supporting is provided for installation of the motor installation support, the structural rigidity in the front-back direction is improved, and the front windshield lower cross beam assembly is convenient to use. And the gutter channel fixing bracket and the vertical reinforcing beam are respectively arranged on the left side and the right side of the motor mounting bracket, so that a structure reinforcing effect is achieved, the vibration of the windshield wiper motor is dispersed in multiple paths, the vibration influence of the windshield wiper motor can be effectively reduced without increasing the thickness of a metal plate of the front windshield lower cross beam, and the NVH (Noise Vibration and Harshness) performance of a vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle front wiper motor mounting brackets, and in particular to a front windshield lower crossbeam assembly, a vehicle front panel assembly and a vehicle. Background Art

[0002] The NVH (noise, vibration and harshness) performance of a car is crucial and directly affects driving comfort. The wiper system is an important source of vibration excitation, and the vibration generated by its motor is transmitted to the car body through the mounting bracket. The mounting bracket of the front wiper motor is a key load-bearing component connecting the wiper motor to the car body. The mounting bracket of the front wiper motor is installed on the lower cross member of the front windshield. Under the current trend of lightweighting of automobiles, traditional metal water troughs are replaced by plastic water troughs, resulting in the connection between the mounting bracket of the front wiper motor and the lower cross member of the front windshield being designed as a cantilever connection. The dynamic stiffness of this area is significantly reduced, making it difficult to effectively suppress and disperse the vibration energy of the wiper motor.

[0003] The existing front wiper motor mounting bracket structure fails to fully optimize the force transmission path. Vibration energy is easily transferred to the vehicle body through a single weak point, lacking a design for multi-path load distribution. Existing technologies often employ thickening patches. For example, increasing the sheet metal thickness of the windshield lower crossmember improves rigidity but directly increases component weight, conflicting with the trend toward lightweight vehicles. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a front windshield lower crossbeam assembly, a vehicle front panel assembly and a vehicle, wherein a lower crossbeam support frame is arranged in the cavity of the front windshield lower crossbeam to support the rear of the motor mounting bracket, thereby providing support for the installation of the motor mounting bracket and improving the structural stiffness in the front and rear directions; a water trough fixing bracket and a vertical reinforcement beam are respectively arranged on the left and right sides of the motor mounting bracket to play a role in structural reinforcement, thereby dispersing the vibration of the wiper motor in multiple ways, and the vibration influence of the wiper motor can be effectively reduced without increasing the sheet metal thickness of the front windshield lower crossbeam, thereby improving the NVH performance of the vehicle.

[0005] The technical solution of the present invention provides a front windshield lower crossbeam assembly, comprising a front windshield lower crossbeam enclosing 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 front windshield;

[0007] A lower cross beam support frame is welded in the cavity, and the lower cross beam support frame extends in the cavity along the front-to-back direction, and the front end of the lower cross beam support frame presses against the rear side of the rear end of the motor mounting bracket;

[0008] A downwardly extending water trough fixing bracket and a vertical reinforcement beam are welded to the front side of the front windshield lower cross beam, and the vertical reinforcement beam and the water trough fixing bracket are located on opposite sides of the motor mounting bracket.

[0009] In one of the optional technical solutions, the motor mounting bracket includes a bracket top plate and two bracket side plates provided on both sides of the bracket top plate, and the two bracket side plates are connected to the bracket top plate to form a U-shaped structure with an opening downward;

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

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

[0012] In one of the optional technical solutions, the rear end of the bracket top plate is provided with a top plate welding flange that is turned upside down and extends, and the top plate welding flange is welded to the lower crossbeam of the front windshield;

[0013] The rear ends of the two bracket side panels are respectively provided with side panel welding flanges that are turned over and extended toward the outside of the bracket side panels, and the two side panel welding flanges are respectively welded to the front windshield lower cross beam.

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

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

[0016] In one of the optional technical solutions, the reinforcement structure includes a plurality of reinforcement ribs.

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

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

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

[0020] The rear end of the lower cross beam support frame is welded to the rear plate of the lower cross beam, and the front end of the lower cross beam support frame is welded to the front plate of the lower cross beam;

[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 cross beam.

[0023] The technical solution of the present invention further provides a vehicle front panel assembly, comprising a front fender assembly and a front windshield lower crossbeam assembly as described in any of the above technical solutions;

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

[0025] A vertical reinforcement bracket for welding to the vertical reinforcement beam is provided on the cross beam on the front baffle;

[0026] The front windshield lower cross beam is welded to the upper end of the front baffle, and the front baffle upper cross beam is located below the front windshield lower cross beam;

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

[0028] The technical solution of the present invention further provides a vehicle, comprising the vehicle front panel assembly described in the above technical solution.

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

[0030] The front windshield lower crossbeam assembly, vehicle front panel assembly and vehicle provided by the present invention include a front windshield lower crossbeam and a motor mounting bracket. The front windshield lower crossbeam has a cavity, and a lower crossbeam support frame is installed in the cavity. 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 is pressed against the rear side of the rear end of the motor mounting bracket, thereby improving the stiffness of the motor mounting bracket in the front and rear directions. A water trough fixing bracket and a vertical reinforcing beam are respectively arranged on the left and right sides of the motor mounting bracket. The water trough fixing bracket is used to connect and fix with the water trough, and the vertical reinforcing beam is used to connect and fix with the crossbeam on the front baffle, thereby improving the structural stiffness around the motor mounting bracket and transmitting the vibration of the wiper motor in multiple ways.

[0031] To sum up, the front windshield lower crossbeam assembly, vehicle front panel assembly and vehicle provided by the present invention, by arranging a lower crossbeam support frame in the cavity of the front windshield lower crossbeam, which is used to support the rear of the motor mounting bracket, provide support for the installation of the motor mounting bracket, and improve the structural stiffness in the front and rear directions, and respectively arrange a water trough fixing bracket and a vertical reinforcement beam on the left and right sides of the motor mounting bracket to play a role of structural reinforcement, and disperse the vibration of the wiper motor 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, thereby improving the NVH performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The disclosure of the present invention will become more easily understood with reference 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 the present invention. In the drawings:

[0033] Figure 1 A perspective view of a front windshield lower cross member assembly provided by one embodiment of the present invention;

[0034] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0035] Figure 3 A schematic diagram of a lower cross member support mounted in a cavity of a front windshield lower cross member;

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

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

[0038] Figure 6 An exploded view of a vehicle dash assembly according to an embodiment of the present invention;

[0039] Figure 7 A three-dimensional view of the crossbeam on the front fender. DETAILED DESCRIPTION

[0040] The following further describes specific embodiments of the present invention with reference to the accompanying drawings. Like components are denoted by like 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, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0041] like Figure 1-5 As shown, a front windshield lower cross member assembly provided by an embodiment of the present invention includes a front windshield lower cross member 1 enclosing 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 front windshield lower crossbeam 1 .

[0043] A lower cross beam support frame 15 is welded in the cavity 14 . The lower cross beam support frame 15 extends in the cavity 14 along the front-to-back direction, and the front end of the lower cross beam support frame 15 presses against the rear side of the rear end of the motor mounting bracket 2 .

[0044] A downwardly extending water chute fixing bracket 3 and a vertical reinforcement beam 4 are welded to the front side of the front windshield lower cross beam 1 . The vertical reinforcement beam 4 and the water chute 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 trough fixing bracket 3, a vertical reinforcement beam 4, and the like.

[0046] The windshield lower cross member 1 has a cavity 14. This cavity 14 is a roughly triangular structure, narrow at the bottom and wide at the top. This significantly enhances the overall rigidity and stability of this area and also serves to absorb vibrations. A lower cross member support frame 15 is mounted within this cavity 14. The front and rear ends of the lower cross member support frame 15 are welded to the front and rear sheet metal of the windshield lower cross member 1, respectively. Multiple welded flanges are provided at each end of the lower cross member support frame 15, which securely connect to the front and rear sheet metal of the windshield lower cross member 1.

[0047] Motor mounting bracket 2, a cantilevered member mounted on the front side of the windshield lower cross member 1, is used to mount the wiper motor. The rear end of motor mounting bracket 2 is welded to the windshield lower cross member 1 and positioned in front of the front end of the lower cross member support bracket 15. The front end of the lower cross member support bracket 15 presses against the rear end of motor mounting bracket 2, increasing the rigidity of motor mounting bracket 2 in the fore-aft direction and distributing vibrations generated by the wiper motor.

[0048] The water trough mounting bracket 3 and vertical reinforcement beam 4 are welded to the front side of the lower cross member 1 of the front windshield and extend downward. Both the water trough mounting bracket 3 and the vertical reinforcement beam 4 are sheet metal components and are located on the left and right sides of the motor mounting bracket 2. The water trough mounting bracket 3 provides a mounting point for the plastic water trough to strengthen it. The vertical reinforcement beam 4 is welded to the vertical reinforcement bracket 521 on the cross member 52 of the front fender below.

[0049] The arrangement of the water trough fixing bracket 3 and the vertical reinforcing beam 4 can improve the structural stiffness at the installation point of the motor mounting bracket 2, suppress vibration, optimize the load distribution, avoid local stress concentration, and transmit the vibration generated by the wiper motor and transmit the vibration in multiple channels.

[0050] To sum up, the front windshield lower crossbeam assembly provided by the present invention is configured to provide 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, provide support for the installation of the motor mounting bracket 2, and improve the structural stiffness in the front and rear directions. A water trough fixing bracket 3 and a vertical reinforcement beam 4 are respectively provided on the left and right sides of the motor mounting bracket 2 to play a role in structural reinforcement, 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 influence of the wiper motor can be effectively reduced, thereby improving the NVH performance of the vehicle.

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

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

[0053] A motor mounting boss 212 and a primary positioning hole 213 are provided on the bracket top plate 21 . The motor mounting boss 212 is provided with a secondary positioning hole 2121 . The primary positioning hole 213 is located obliquely in front of the secondary positioning hole 2121 .

[0054] In this embodiment, the motor mounting bracket 2 primarily consists of a bracket top plate 21 and two bracket side plates 22. The two bracket side plates 22 are connected to either side of the bracket top plate 21 and extend downward, forming a downward-opening U-shaped structure. The rear ends of the bracket top plate 21 and the two bracket side plates 22 are welded to the front windshield lower crossbeam 1. The rear end of the U-shaped structure is welded to the front windshield lower crossbeam 1, creating a triangular support effect similar to "upward pull and downward support," further enhancing stability.

[0055] The bracket top plate 21 is used to install the wiper motor. The top surface of the bracket top plate 21 is provided with a motor mounting boss 212. The motor mounting boss 212 is provided with a secondary positioning hole 2121 for positioning the installation shaft of the wiper motor. The secondary positioning hole 2121 is arranged toward the outside (right side) of the bracket top plate 21 to leave space for installing components on the inside (left side). A main positioning hole 213 is provided at the left front corner of the bracket top plate 21 for positioning and installation with the positioning pin in the front baffle assembly 5. The main positioning hole 213 is located obliquely in front of the secondary positioning hole 2121, rather than directly in front of the secondary positioning hole 2121. Increasing the distance between the two can provide a larger avoidance space.

[0056] In one embodiment, Figure 5 As shown, the rear end of the bracket top plate 21 is provided with a top plate welding flange 211 that is turned upside down and extends, and the top plate welding flange 211 is welded to the front windshield lower crossbeam 1.

[0057] The rear ends of the two bracket side panels 22 are respectively provided with side panel welding flanges 221 that are turned over and extended toward the outside of the bracket side panels 22 . The two side panel welding flanges 221 are respectively welded to the front windshield lower cross beam 1 .

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

[0059] During welding, the top plate welding flange 211 and the two side plate welding flanges 221 are respectively welded to the lower cross beam 1 of the front windshield, forming a "pull up and support down" triangular support effect in which the top plate welding flange 211 pulls the bracket top plate 21, and the lower side plate welding flange 221 supports the bracket top plate 21, thereby improving the connection stability. In addition, the area of ​​the welding flange is large, which is convenient for welding and the welding is more reliable.

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

[0061] In this embodiment, the entire motor mounting bracket 2 can be stamped and formed as one piece, and its bracket top plate 21 and two bracket side plates 22 are stamped and formed as one piece, the top plate welding flange 211 is stamped and formed as one piece from the rear end of the bracket top plate 21, and the side plate welding flange 221 is stamped and formed as one piece from the rear end of the bracket side plate 22, which 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 welding flanges, which are respectively configured to correspond to the top plate welding flange 211 and the two side plate welding flanges 221, so as to stably support the motor mounting bracket 2.

[0063] In one embodiment, Figure 5 As shown, a reinforcement structure 214 is provided on the bracket top plate 21 behind the motor mounting boss 212 to further enhance the structural strength of the rear side of the motor mounting boss 212 and improve the bending and torsional rigidity of the key area of ​​the bracket top plate 21. The reinforcement structure 214 can take the form of a rib, a reinforcement plate, or other structural form.

[0064] In one embodiment, Figure 5As shown, the reinforcement structure 214 includes a plurality of reinforcement ribs 2141. In this embodiment, the reinforcement structure 214 is locally reinforced in the form of reinforcement ribs 2141. The plurality of reinforcement ribs 2141 are arranged at intervals along the left-right direction to improve the bending and torsional rigidity of the rear area of ​​the bracket top plate 21.

[0065] In one embodiment, Figure 5 As shown, along the width direction of the bracket top plate 21 , the structural dimensions of the reinforcing ribs 2141 farther from the secondary positioning holes 2121 are greater than the structural dimensions of the reinforcing ribs 2141 closer to the secondary positioning holes 2121 .

[0066] Because the motor mounting boss 212 and secondary positioning hole 2121 are located slightly to the right of the bracket top plate 21, the portion of the right side of the bracket top plate 21 containing the motor mounting boss 212 is relatively close to the rear end of the bracket top plate 21 and is reinforced by the motor mounting boss 212. To ensure consistent structural rigidity across the rear end of the bracket top plate 21, the thickness of the reinforcing rib 2141 is determined by the distance between the rib 2141 and the secondary positioning hole 2121. The structural dimensions of the reinforcing rib 2141 in this embodiment primarily refer to its thickness.

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

[0068] In one embodiment, Figure 1-4 As shown, the front windshield lower cross beam 1 includes a lower cross beam front plate 11 , a lower cross beam rear plate 12 and a lower cross beam cover plate 13 connected between the upper ends of the lower cross beam front plate 11 and the lower cross beam rear plate 12 .

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

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

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

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

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

[0074] The lower end of the lower crossbeam front plate 11 is slightly rearward, and its main body is tilted and extended forward. The lower end of the lower crossbeam rear plate 12 is slightly frontward, and its main body is tilted and extended backward.

[0075] The lower end of the lower cross beam rear plate 12 is welded to the lower end of the lower cross beam front plate 11 , and the lower cross beam cover plate 13 is welded to the upper ends of the lower cross beam rear plate 12 and the lower cross beam front plate 11 , thereby forming a roughly triangular cavity 14 therebetween.

[0076] As needed, a reinforcement plate may be provided on the front side surface of the lower cross beam rear plate 12 and / or the rear side surface of the lower cross beam front plate 11 .

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

[0078] The lower cross beam support frame 15 is welded between the lower cross beam rear plate 12 and the lower cross beam 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 and arranged in a three-layer structure. The three layers are welded to each other, which is more stable.

[0080] like Figure 6-7 As shown, a vehicle front panel assembly provided by one embodiment of the present invention includes a front fender assembly 5 and the front windshield lower cross beam assembly described in any of the aforementioned embodiments.

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

[0082] A vertical reinforcement bracket 521 for welding to the vertical reinforcement beam 4 is provided on the cross beam 52 on the front baffle.

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

[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 a part of the front of the vehicle, which includes a front fender assembly 5 and a front windshield lower crossbeam assembly.

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

[0087] The front fender assembly 5 includes a front fender 51 and a crossbeam 52 on the front fender. The crossbeam 52 is welded to the upper end of the front fender 51. A vertical reinforcement bracket 521 is provided on the crossbeam 52 on the front fender at a position corresponding to the vertical reinforcement beam 4. The vertical reinforcement bracket 521 extends upward and is used to be welded to the vertical reinforcement beam 4.

[0088] During assembly, the windshield lower cross member 1 is welded to the upper end of the front fender 51 and positioned above the windshield lower cross member 1. The vertical reinforcement bracket 521 covers part or all of the vertical reinforcement beam 4. The welding of the vertical reinforcement bracket 521 to the vertical reinforcement beam 4 not only strengthens the connection but also transmits vibrations from the wiper motor to the front fender assembly 5, dissipating them.

[0089] As needed, the bottom of the front baffle upper cross beam 52 can be welded to the top of the front windshield lower cross beam 1.

[0090] As needed, an avoidance groove may be provided on the top of the crossbeam 52 on the front baffle to avoid the motor mounting bracket 2 .

[0091] Regarding the layout of the water trough, please refer to the description in the prior art and will not be repeated here.

[0092] An embodiment of the present invention provides a vehicle, comprising the vehicle front panel assembly described in the above embodiment.

[0093] The front windshield lower cross member assembly, vehicle front panel assembly, and vehicle provided by the present invention achieve an effective balance between lightweight and high rigidity, significantly improving the NVH performance of the vehicle, as embodied in the following aspects:

[0094] 1. Significant improvement in dynamic stiffness and vibration suppression:

[0095] Multi-path vibration dissipation: The cavity 14 structure of the front windshield lower cross member 1 has been optimized to form a triangular cavity. Combined with multi-layer welding nodes and a multi-directional force flow network, an efficient multi-path vibration transmission and dispersion mechanism is jointly constructed, which greatly reduces the concentration of vibration energy in a single weak link.

[0096] Reduced resonance risk: The increased stiffness of the wiper motor mounting point changes the structural 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] Combined with the three-layer welding and reinforcement rib design, 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 part weight reduction.

[0100] 2. Balance between lightweighting and performance: The motor mounting bracket 2 is designed as a downward-opening U-shaped structure with unevenly distributed reinforcement ribs to increase local stiffness. This allows for reduced 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. Structural design innovation brings improved reliability: The U-shape of the motor mounting bracket 2 combined with the design of specific flanges and reinforcing ribs significantly enhances the bending and torsional rigidity of the motor mounting bracket 2.

[0102] The coordinated design of various components optimizes overall stiffness matching and load transfer, and improves the reliability and durability of the system under complex working conditions.

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

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

Claims

1. A front windshield lower crossbeam assembly, characterized in that: It includes a front windshield lower cross member enclosing a cavity and a motor mounting bracket for mounting a front wiper motor; The rear end of the motor mounting bracket is welded to the lower crossbeam of the front windshield; A lower cross beam support frame is welded in the cavity, and the lower cross beam support frame extends in the cavity along the front-to-back direction, and the front end of the lower cross beam support frame presses against the rear side of the rear end of the motor mounting bracket; A downwardly extending water trough fixing bracket and a vertical reinforcement beam are welded to the front side of the front windshield lower cross beam, and the vertical reinforcement beam and the water trough fixing bracket are located on opposite sides of the motor mounting bracket.

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

3. The front windshield lower cross member assembly according to claim 2, characterized in that: The rear end of the bracket top plate is provided with a top plate welding flange that is turned upside down and extended, and the top plate welding flange is welded to the lower crossbeam of the front windshield; The rear ends of the two bracket side panels are respectively provided with side panel welding flanges that are turned over and extended toward the outside of the bracket side panels, and the two side panel welding flanges are respectively welded to the front windshield lower cross beam.

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

5. The front windshield lower cross member assembly according to claim 2, characterized in that: A reinforcement structure is provided on the top plate of the bracket at the rear side of the motor mounting boss.

6. The front windshield lower cross member assembly according to claim 5, characterized in that: The reinforcement structure includes a plurality of reinforcement ribs.

7. The front windshield lower cross member assembly according to claim 6, characterized in that: In the width direction of the bracket top plate, the structural dimensions of the reinforcing rib farther from the secondary positioning hole are greater than the structural dimensions of the reinforcing rib closer to the secondary positioning hole.

8. The front windshield lower cross member assembly according to claim 1, characterized in that: The front windshield lower cross beam includes a lower cross beam front plate, a lower cross beam rear plate, and a lower cross beam cover plate connected between the upper ends of the lower cross beam front plate and the lower cross beam rear plate; The lower end of the lower cross beam rear plate is welded to the lower end of the lower cross beam front plate, the main body of the lower cross beam rear plate gradually extends backward and upward, the cavity is formed between the lower cross beam rear plate and the lower cross beam front plate, and the lower cross beam cover plate covers the top of the cavity; The rear end of the lower cross beam support frame is welded to the rear plate of the lower cross beam, and the front end of the lower cross beam support frame is welded to the front plate of the lower cross beam; 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 cross beam.

9. A vehicle front panel assembly, characterized in that: It comprises a front fender assembly and a front windshield lower crossbeam assembly according to any one of claims 1 to 8; The front fender assembly includes a front fender and a front fender upper crossbeam welded to the front fender; A vertical reinforcement bracket for welding to the vertical reinforcement beam is provided on the cross beam on the front baffle; The front windshield lower cross beam is welded to the upper end of the front baffle, and the front baffle upper cross beam is located below the front windshield lower cross beam; The vertical reinforcement bracket covers at least a portion of the vertical reinforcement beam, and the vertical reinforcement bracket is welded to the vertical reinforcement beam.

10. A vehicle, characterized in that: The vehicle front panel assembly includes the vehicle front panel assembly according to claim 9.

Images