A high-strength, high-precision dual-tube instrument panel crossbeam

Abstract

This utility model relates to the field of automotive instrument panel crossbeam technology, and particularly to a high-strength, high-precision dual-tube instrument panel crossbeam, comprising dual main tube beams, a steering column bracket, a central bracket, and end brackets. The dual main tube beams include an upper main tube beam and a lower main tube beam, which are interconnected through end brackets to form a frame structure. This utility model adopts a dual main tube beam design, which strengthens the overall structure and improves the overall modality of the instrument panel crossbeam. The brackets of each module of the steering column bracket, central bracket, and end brackets are optimized according to the dual main tube beam design, resulting in a more stable structure. The positioning, installation, and stiffness reinforcement of each module's brackets can resist deformation during the installation, storage, and transportation of the instrument panel crossbeam. The use of dual main tube beams also provides a certain radial structural stiffness to prevent airbag displacement during airbag deployment. Furthermore, it can prevent resonance, system vibration, and safety and functional failures such as air conditioning blower sagging.

Description

Technical Field

[0001] This utility model relates to the field of automotive dashboard crossbeam technology, and in particular to a high-strength, high-precision double-tube dashboard crossbeam. Background Technology

[0002] The car dashboard serves as the platform for numerous functions, including audio, air conditioning, and lighting, and is an important component of the car's interior. The dashboard crossbeam is a crucial part of the dashboard; its two ends support the steering column and airbags, while the middle supports the central air conditioning system, providing excellent stability for the dashboard. Directly connected to the vehicle body, it bears, absorbs, and transfers energy and loads during a collision, making it a vital structure related to occupant protection. In existing technologies, sheet metal dashboard crossbeams utilize methods such as... Figure 1 The single main beam 1' shown includes various supports, including the steering column support 2' and the central support 3', which are directly welded to the main beam 1'. Due to the supports' susceptibility to wobbling and thermal deformation during welding, their strength and precision are relatively poor. Furthermore, the existing structure of each support and the single main beam is relatively thin, and its strength needs to be improved. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the above-mentioned technical problems, this utility model provides a high-strength and high-precision dual-tube instrument panel crossbeam.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a high-strength, high-precision dual-tube instrument panel crossbeam, including dual main tube beams, a steering column bracket, a central bracket, and end brackets. The dual main tube beams include an upper main tube beam and a lower main tube beam, which are interconnected by the end brackets to form a frame structure. The upper and lower main tube beams are arranged horizontally vertically. The steering column bracket is located on the left or right side of the dual main tube beams. In a left-hand drive vehicle, the driver's seat is located on the left, and the steering column bracket is located on the right; in a right-hand drive vehicle, the driver's seat is located on the right, and the steering column bracket is located on the right. The central bracket is located in the middle of the dual main tube beams. The steering column bracket is fixed to both the upper and lower main tube beams. The steering column bracket is fixed to the front of the vehicle body, the central bracket is fixed to the vehicle floor, and the end brackets are fixed to the side of the vehicle body.

[0005] The steering column bracket includes a left bracket and a right bracket symmetrically arranged at the left and right ends of the vehicle steering column, respectively. The left and right brackets are connected to each other by a support beam, which is laterally positioned between the left and right brackets. Both the left and right brackets are plate-shaped and vertically mounted on the double main beams. The upper side of both the left and right brackets has upper tube beam mounting holes, and both the left and right brackets are connected and fixed to the upper main beam at their upper tube beam mounting holes. The lower end of both the left and right brackets has lower tube beam mounting holes, and both the left and right brackets are connected and fixed to the lower main beam at their lower tube beam mounting holes. Both the left and right brackets are fixed to the front of the vehicle body. Both the left and right brackets have steering column mounting point areas that protrude from the space between the upper and lower main beams. The steering column bracket is fixed to the front of the vehicle body through two mounting points, the left and right brackets, which disperses the resonance vibration force and makes the structure more robust. The support beam is set laterally between the left and right brackets, and then connected to the upper and lower main beams through the left and right brackets respectively, so that the steering column bracket forms a stable frame structure. The left and right brackets are set at the left and right ends of the car steering column respectively. After the left and right sides are separated, the force is not so concentrated, making the force on the steering column more balanced and preventing stress concentration that could cause the steering column bracket to crack during a collision.

[0006] The steering column mounting point areas of the left and right supports are provided with steering column flange structures, which can prevent the steering column from sinking during installation.

[0007] Both the left and right brackets are equipped with sheet metal sheets, which are located on the back of the steering column mounting point area of ​​the left or right bracket. The steering column mounting point area is the stress point of the steering shaft. The design of the sheet metal sheets greatly increases the overall strength of the steering column bracket, avoiding insufficient strength caused by the steering column bracket continuously bearing the stress of the steering shaft, and preventing the bracket from cracking and the mounting point from loosening due to repeated stress, which could lead to abnormal noise and functional failure.

[0008] The central support includes a driver's side support, a passenger side support, an upper support, a middle support, a lower middle support, and a bottom support. The driver's side support and the passenger side support are both plate-shaped and vertically mounted on the double main beams. The upper support and the middle support are horizontally positioned between the driver's side support and the passenger side support. The driver's side support, the upper support, the passenger side support, and the middle support are sequentially connected to form a frame cavity structure. The driver's side support, the lower middle support, and the bottom support are sequentially connected vertically. The upper ends of both the driver's side support and the passenger side support have upper tube beam mounting holes, and both the driver's side support and the passenger side support are connected and fixed to the upper main beam at their upper tube beam mounting holes. The lower ends of both the driver's side support and the passenger side support have lower tube beam mounting holes, and both the driver's side support and the passenger side support are connected and fixed to the lower main beam at their lower tube beam mounting holes. The bottom support is fixed to the vehicle floor. The various brackets of the central support can be connected by welding and then bolted to the dashboard crossbeam, ensuring high connection precision. The bottom bracket is fixed to the vehicle floor with two bolts at the front and rear. The bracket is large and strong, improving the strength of the driving area and ensuring the strength of the driving area while meeting the fixing requirements of the central support assembly. The four brackets of the driver's side bracket, upper bracket, passenger side bracket, and middle bracket, which is the central support, form a frame cavity. The structure is stable and strong. The frame cavity structure can transfer and absorb collision loads, increase the overall modal frequency of the dashboard crossbeam, and avoid steering wheel vibration and abnormal noise caused by insufficient overall strength of the dashboard crossbeam.

[0009] Both the driver's side bracket and the passenger side bracket have a hollow structure and a central bracket flange structure. The hollow structure allows for localized weight reduction of the bracket, while the flange structure around the perimeter of the driver's side bracket and the passenger side bracket strengthens their structure.

[0010] The lower and middle supports and the bottom support are sheet-like. The widths of the driver's side support, lower and middle supports, and bottom supports are equal or approximately equal, or the widths of the driver's side support and bottom support are slightly larger than the width of the lower and middle supports. The driver's side support, lower and middle supports, and bottom supports are reinforced by increasing their width in the X-direction to improve strength. The reinforced driver's side area absorbs energy and limits the intrusion of the steering wheel and pedals during frontal and side impacts, protecting occupants and improving safety.

[0011] The end bracket has a laterally extending end flange structure. The upper side of the end bracket has an upper interface, and the lower side has a lower interface. The end bracket is fixed to the upper main beam at the upper interface and to the lower main beam at the lower interface. An upper support plate is also fixed between the end bracket and the upper main beam, and a lower support plate is also fixed between the end bracket and the lower main beam. The upper support plate is laterally positioned near the upper interface, and the lower support plate is obliquely positioned and extends obliquely from the middle of the end bracket to the lower main beam. The end bracket's end flange structure, extending laterally (X-direction), strengthens the structure. Furthermore, the upper and lower support plates reinforce the structure, improving the modal strength of the instrument panel crossbeam in the vehicle's overall condition and preventing systemic risks caused by insufficient strength, such as significant steering wheel vibration or collision-induced fracture leading to occupant injury.

[0012] The end support surface has oblique reinforcing ribs located on the surface of the end support facing the double main beams, and the reinforcing ribs extend obliquely from below the upper support plate to the lower support plate.

[0013] The lower main beam has lower tube bushings at both ends, and each end of the lower main beam is fixed to the side panel of the vehicle body by a long bolt.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a high-strength, high-precision dual-tube instrument panel crossbeam, employing a dual-tube main beam design with overall structural reinforcement to improve the overall modality of the instrument panel crossbeam; the supports of each module—steering column bracket, central bracket, and end bracket—are optimized based on the dual-tube main beam design, resulting in a more stable structure; the enhanced positioning, installation, and rigidity of each module's supports can resist deformation during installation, storage, and transportation of the instrument panel crossbeam; the dual-tube main beam design also provides a certain radial structural rigidity to prevent airbag displacement during airbag deployment; furthermore, the upper and lower dual-tube structure can prevent resonance, system vibration, and safety and functional failures such as air conditioning blower sagging. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a structural diagram of an existing automotive dashboard crossbeam.

[0017] Figure 1 In the middle, 1' is the main beam, 2' is the steering column support, and 3' is the central support.

[0018] Figure 2 This is a structural schematic diagram of a high-strength, high-precision dual-tube instrument panel crossbeam according to this utility model.

[0019] Figure 3This is a schematic diagram of the front of the steering column bracket of this utility model.

[0020] Figure 4 This is a schematic diagram of the reverse side of the steering column bracket of this utility model.

[0021] Figure 5 This is a schematic diagram of the installation structure of the lower mounting bracket in the steering column bracket of this utility model.

[0022] Figure 6 This is a three-dimensional structural diagram of the front of the central support of this utility model.

[0023] Figure 7 This is a schematic diagram of the left-side structure of the central support of this utility model.

[0024] Figure 8 This is a three-dimensional structural diagram of the central support of this utility model from another angle.

[0025] Figure 9 This is a schematic diagram of the installation structure of the end bracket of this utility model.

[0026] Figure 10 This is a schematic diagram of the end bracket of this utility model.

[0027] Figure 11 This is a structural schematic diagram of the end bracket of this utility model from another perspective.

[0028] Figure 2-10 In the middle, 1. Upper main beam, 2. Lower main beam, 2-1. Lower tube bushing, 100. Steering column bracket, 101. Left bracket, 102. Right bracket, 103. Support beam, 104. Upper tube beam mounting hole a, 105. Lower tube beam mounting hole a, 106. Mounting bushing, 107. Steering column flange structure, 108. Sheet metal sheet, 109. Lower mounting bracket, 200. Central bracket, 201. Driver's side bracket, 202. Passenger's side bracket, 203. Upper bracket Frame, 204, middle support, 205, lower middle support, 206, bottom support, 207, upper pipe beam mounting hole b, 208, lower pipe beam mounting hole b, 209, hollow structure, 210, central support flange structure, 211, bottom mounting hole, 300, end support, 301, end flange structure, 302, upper interface, 303, lower interface, 304, reinforcing rib, 305, branch reinforcing section, 306, upper support piece, 307, lower support piece. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] like Figure 2 As shown, this utility model discloses a high-strength, high-precision dual-tube instrument panel crossbeam, comprising dual main tube beams, a steering column bracket 100, a central bracket 200, and an end bracket 300. The dual main tube beams include an upper main tube beam 1 and a lower main tube beam 2, which are interconnected by the end brackets 300 to form a frame structure. The upper and lower main tube beams 1 and 2 are arranged horizontally vertically. The steering column bracket 100 is located on the left or right side of the dual main tube beams. In a left-hand drive vehicle, the driver's seat is located on the left, and the steering column bracket 100 is located on the right; in a right-hand drive vehicle, the driver's seat is located on the right, and the steering column bracket 100 is located on the right. The central bracket 200 is located in the middle of the dual main tube beams. The steering column bracket 100 is fixed to both the upper and lower main tube beams 1 and 2. The steering column bracket 100 is fixed to the front of the vehicle body, the central bracket 200 is fixed to the vehicle floor, and the end brackets 300 are fixed to the side of the vehicle body.

[0031] like Figure 3-4 As shown, the steering column bracket 100 includes a left bracket 101 and a right bracket 102 symmetrically arranged. The left bracket 101 and the right bracket 102 are respectively located at the left and right ends of the vehicle steering column. The left bracket 101 and the right bracket 102 are connected to each other by a support beam 103, which is laterally arranged between the left bracket 101 and the right bracket 102. Both the left bracket 101 and the right bracket 102 are plate-shaped and vertically arranged on the double main beam. The upper side of the left bracket 101 and the upper side of the right bracket 102 both have upper tube beam mounting holes a104. Both the left and right brackets 101 and 102 are connected and fixed to the upper main beam 1 at their upper tube beam mounting holes a104. The lower ends of both the left and right brackets 101 and 102 have lower tube beam mounting holes a105, which are also connected and fixed to the lower main beam 2. Both the left and right brackets 101 and 102 are fixed to the front of the vehicle body. Both have steering column mounting point areas that protrude from the space between the upper and lower main beams 1 and 2. The upper tube beam mounting hole a104 is located on the upper side of either the left or right bracket 101 and is fixed to the lower side of the upper main beam 1. The lower tube beam mounting hole a105 is located on the front side of the lower end of either the left or right bracket 101 and is fixed to the rear side of the lower main beam 2 facing the front of the vehicle body. Figure 2 As shown, the left bracket 101 and the right bracket 102 have portions that extend into and protrude from the space between the upper main beam 1 and the lower main beam 2. The portion that protrudes from the space between the upper main beam 1 and the lower main beam 2 is the steering column mounting point area.

[0032] Both the left bracket 101 and the right bracket 102 are bolted to the upper main beam 1 at the mounting hole a104 on the upper tube beam, and both are bolted to the lower main beam 2 at the mounting hole a105 on the lower tube beam. Mounting bushings 106 are installed on both the left bracket 101 and the right bracket 102 facing the front of the vehicle body, and both are bolted to the front of the vehicle body at the mounting bushings 106. This avoids shaking and thermal deformation during welding, improving installation accuracy.

[0033] The steering column mounting point areas of the left bracket 101 and the right bracket 102 are provided with steering column flange structures 107.

[0034] Both the left bracket 101 and the right bracket 102 are provided with sheet metal sheets 108, which are located on the back side of the steering column mounting point area of ​​the left bracket 101 or the right bracket 102. In this embodiment, the sheet metal sheet 108 is preferably 5mm thick, and the sheet metal sheet 108 is welded to the left bracket 101 and the right bracket 102.

[0035] like Figure 5 As shown, the steering column bracket 100 also includes a lower mounting bracket 109, which is bolted to the lower main beam 2. The lower mounting bracket 109 can provide structural reinforcement to the lower main beam 2 in the driver's seat position.

[0036] like Figure 6-8 As shown, the central support 200 includes a driver's side support 201, a passenger side support 202, an upper support 203, a middle support 204, a lower middle support 205, and a bottom support 206. The driver's side support 201 and the passenger side support 202 are both plate-shaped and vertically mounted on the double main beams. The upper support 203 and the middle support 204 are horizontally positioned between the driver's side support 201 and the passenger side support 202. The driver's side support 201, the upper support 203, the passenger side support 202, and the middle support 204 are sequentially connected to form a frame cavity structure. The driver's side support 201 and the lower middle support 205... The bottom bracket 206 is connected sequentially from top to bottom; the upper end of the driver's side bracket 201 and the upper end of the passenger side bracket 202 both have upper tube beam mounting holes b207, and the driver's side bracket 201 and the passenger side bracket 202 are both connected and fixed to the upper main tube beam 1 at their upper tube beam mounting holes b207. The lower end of the driver's side bracket 201 and the lower end of the passenger side bracket 202 both have lower tube beam mounting holes b208, and the driver's side bracket 201 and the passenger side bracket 202 are both connected and fixed to the lower main tube beam 2 at their lower tube beam mounting holes b208. The bottom bracket 206 is fixed to the vehicle floor.

[0037] The driver's side bracket 201 and the passenger side bracket 202 are symmetrically arranged. In a left-hand drive vehicle, the driver's seat is located on the left, the driver's side bracket 201 is on the left, and the passenger side bracket 202 is on the right. In a right-hand drive vehicle, the driver's seat is located on the right, the driver's side bracket 201 is on the right, and the passenger side bracket 202 is on the left. This embodiment is an example of a left-hand drive vehicle where the driver's side bracket 201 is on the left and the passenger side bracket 202 is on the right.

[0038] Both the driver's side bracket 201 and the passenger side bracket 202 have a hollow structure 209 and a central bracket flange structure 210.

[0039] The lower middle bracket 205 and the bottom bracket 206 are sheet-like. The widths of the driver's side bracket 201, lower middle bracket 205, and bottom bracket 206 are equal or approximately equal, or the widths of the driver's side bracket 201 and bottom bracket 206 are slightly larger than the width of the lower middle bracket 205. The difference in width between the driver's side bracket 201 and bottom bracket 206 and the lower middle bracket 205 depends on actual installation requirements. The width of the driver's side bracket 201 is primarily to accommodate the installation requirements of the central air conditioning compressor and takes into account the actual installation space. The width of the bottom bracket 206 is mainly to consider the installation dimensions at the bottom where it is fixed to the vehicle floor. The driver's side bracket 201, lower middle bracket 205, and bottom bracket 206 are enlarged and widened in the X-direction (width direction) to enhance strength. This reinforcement in the driver's side area absorbs energy during frontal and side impacts and limits the intrusion of the steering wheel and pedals, protecting occupants and improving safety. The bottom bracket 206 is fixed to the vehicle floor using two bolts, one at the front and one at the rear. Figure 8 The two bottom mounting holes 211 are the bolt holes for the bottom bracket 206 to be installed and connected to the vehicle floor. In this embodiment, the width of the driver's side bracket 201 is 145mm-160mm, the width of the lower middle bracket 205 is 140mm-150mm, and the width of the bottom bracket 206 is 170mm-180mm.

[0040] like Figure 9-11As shown, the end bracket 300 has an end flange structure 301 extending laterally. The upper side of the end bracket 300 has an upper interface 302, and the lower side has a lower interface 303. The end bracket 300 is fixed to the upper main beam 1 at the upper interface 302 and to the lower main beam 2 at the lower interface 303. An upper support piece 306 is also fixed between the end bracket 300 and the upper main beam 1, and a lower support piece 307 is also fixed between the end bracket 300 and the lower main beam 2. The upper support piece 306 is laterally positioned near the upper interface 302, and the lower support piece 307 is obliquely positioned and extends obliquely from the middle of the end bracket 300 to the lower main beam 2. In this embodiment, the end bracket 300 is fixed to both the upper main beam 1 and the lower main beam 2 by welding. The upper support plate 306 is fixed to the end bracket 300 and the upper main beam 1 by welding; the lower support plate 307 is fixed to the end bracket 300 and the lower main beam 2 by welding.

[0041] The end bracket 300 has an oblique reinforcing rib 304 on its surface facing the double main beam. The reinforcing rib 304 extends obliquely from below the upper support plate 306 to the lower support plate 307. The reinforcing rib 304 has a branch reinforcing section 305 at the connection point between the lower support plate 307 and the end bracket 300.

[0042] Different end supports can be connected to both ends of the double main beam. The end support of this invention can be installed only at one end of the double main beam, while the other end uses an end support of a different structure; alternatively, both ends of the double main beam can use the end support of this invention. For example... Figure 2 As shown, only one end adopts the end bracket described in this utility model.

[0043] The lower main beam 2 has lower tube bushings 2-1 at both ends. Each end of the lower main beam 2 is fixed to the side panel of the vehicle body by a long bolt, and the lower tube bushings 2-1 are welded to the lower main beam 2. Preferably, each end of the lower main beam 2 is fixed to the side panel of the vehicle body by a long hexagonal flange bolt.

[0044] This utility model discloses a high-strength, high-precision dual-tube instrument panel crossbeam. It employs a dual-tube main beam design, with overall structural reinforcement to improve the overall modality of the instrument panel crossbeam. The supports of each module—steering column bracket 100, central bracket 200, and end bracket 300—are optimized based on the dual-tube main beam design, resulting in a more stable structure. The enhanced positioning, installation, and rigidity of the supports of each module—steering column bracket 100, central bracket 200, and end bracket 300—can resist deformation during the installation, storage, and transportation of the instrument panel crossbeam. The dual-tube main beam design also provides a certain radial structural rigidity to prevent airbag displacement during airbag deployment. Furthermore, the upper and lower dual-tube structure can prevent resonance, system vibration, and safety and functional failures such as air conditioning blower sagging.

[0045] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high strength, high precision dual-tube instrument panel cross-car beam characterized by: It includes a double main beam, a steering column bracket (100), a central bracket (200), and an end bracket (300). The double main beam includes an upper main beam (1) and a lower main beam (2). The upper main beam (1) and the lower main beam (2) are connected to each other through the end bracket (300) to form a frame structure. The upper main beam (1) and the lower main beam (2) are arranged horizontally in the upper and lower directions. The steering column bracket (100) is located on the left or right side of the double main beam. The central bracket (200) is located in the middle of the double main beam. The steering column bracket (100) is fixed to both the upper main beam (1) and the lower main beam (2). The central bracket (200) is fixed to both the upper main beam (1) and the lower main beam (2). The steering column bracket (100) is fixed to the front of the vehicle body. The central bracket (200) is fixed to the floor of the vehicle body. The end bracket (300) is fixed to the side of the vehicle body.

2. The high strength, high accuracy dual-tube instrument panel beam of Claim 1, wherein: The steering column bracket (100) includes a left bracket (101) and a right bracket (102) symmetrically arranged. The left bracket (101) and the right bracket (102) are respectively arranged at the left and right ends of the vehicle steering column. The left bracket (101) and the right bracket (102) are connected to each other by a support beam (103). The support beam (103) is arranged laterally between the left bracket (101) and the right bracket (102). The left bracket (101) and the right bracket (102) are both plate-shaped and vertically arranged on the double main beam. The upper side of the left bracket (101) and the upper side of the right bracket (102) both have upper tube beam mounting holes a (104). The left bracket (101) 1) Both the right bracket (102) and the left bracket (101) are connected and fixed to the upper main beam (1) at the upper tube beam mounting hole a (104). The lower end of the left bracket (101) and the lower end of the right bracket (102) both have a lower tube beam mounting hole a (105). The left bracket (101) and the right bracket (102) are connected and fixed to the lower main beam (2) at the lower tube beam mounting hole a (105). The left bracket (101) and the right bracket (102) are both fixed to the front of the vehicle body. The left bracket (101) and the right bracket (102) both have a steering column mounting point area. The steering column mounting point area protrudes from the space between the upper main beam (1) and the lower main beam (2).

3. The high strength, high accuracy dual-tube instrument panel beam of Claim 2, wherein: The steering column mounting point areas of the left bracket (101) and the right bracket (102) are provided with steering column flange structures (107).

4. The high strength, high accuracy dual-tube instrument panel beam of Claim 2, wherein: Both the left bracket (101) and the right bracket (102) are provided with sheet metal sheets (108), which are located on the back of the steering column mounting point area of ​​the left bracket (101) or the right bracket (102).

5. The high-strength, high-precision dual-tube instrument panel beam defined in claim 1, wherein: The central support (200) includes a driver's side support (201), a passenger side support (202), an upper support (203), a middle support (204), a lower middle support (205), and a bottom support (206). The driver's side support (201) and the passenger side support (202) are both plate-shaped and vertically mounted on the double main beams. The upper support (203) and the middle support (204) are horizontally positioned between the driver's side support (201) and the passenger side support (202). The driver's side support (201), upper support (203), passenger side support (202), and middle support (204) are sequentially connected to form a frame cavity structure. The driver's side support (201), lower middle support (205), and lower middle support (206) are... 205) and bottom bracket (206) are connected sequentially from top to bottom; the upper end of the driver side bracket (201) and the upper end of the passenger side bracket (202) are both provided with upper tube beam mounting holes b (207), the driver side bracket (201) and the passenger side bracket (202) are both connected and fixed to the upper main tube beam (1) at their upper tube beam mounting holes b (207), the lower end of the driver side bracket (201) and the lower end of the passenger side bracket (202) are both provided with lower tube beam mounting holes b (208), the driver side bracket (201) and the passenger side bracket (202) are both connected and fixed to the lower main tube beam (2) at their lower tube beam mounting holes b (208), and the bottom bracket (206) is fixed to the vehicle floor.

6. The high-strength, high-precision dual-tube instrument panel crossbeam as described in claim 5, characterized in that: Both the driver's side bracket (201) and the passenger side bracket (202) have a hollow structure (209) and a central bracket flange structure (210).

7. The high-strength, high-precision dual-tube instrument panel beam defined in claim 5, wherein: The lower middle bracket (205) and the bottom bracket (206) are sheet-like. The widths of the driver's side bracket (201), the lower middle bracket (205) and the bottom bracket (206) are equal or approximately equal, or the widths of the driver's side bracket (201) and the bottom bracket (206) are slightly larger than the width of the lower middle bracket (205).

8. The high-strength, high-precision dual-tube instrument panel beam of Claim 1 wherein: The end bracket (300) has an end flange structure (301) extending laterally. The upper side of the end bracket (300) has an upper interface (302), and the lower side of the end bracket (300) has a lower interface (303). The end bracket (300) is fixed to the upper main beam (1) at the upper interface (302) and to the lower main beam (2) at the lower interface (303). An upper support piece (306) is also fixed between the end bracket (300) and the upper main beam (1), and a lower support piece (307) is also fixed between the end bracket (300) and the lower main beam (2). The upper support piece (306) is laterally positioned near the upper interface (302), and the lower support piece (307) is obliquely positioned and extends obliquely from the middle position of the end bracket (300) to the lower main beam (2).

9. The high-strength, high-precision dual-tube instrument panel beam defined in claim 8, wherein: The end support (300) has an oblique reinforcing rib (304) on its surface, the reinforcing rib (304) being located on the surface of the end support (300) facing the double main beam, and the reinforcing rib (304) extending obliquely from below the upper support plate (306) to the lower support plate (307).

10. The high-strength, high-precision dual-tube instrument panel crossbeam as described in claim 1, characterized in that: The lower main beam (2) is provided with a lower tube bushing (2-1) at both ends, and each end of the lower main beam (2) is fixed to the side of the vehicle body by a long bolt.

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