Rear section of front longitudinal beam of vehicle and vehicle

Abstract

The present application relates to the field of vehicle body structure, and specifically provides a rear section of a front longitudinal beam of a vehicle and the vehicle, aiming at solving the problem that the collision energy of the vehicle is difficult to be transmitted to the longitudinal beam, the rear end structure of the front longitudinal beam and the rocker beam in the prior art. To this end, the rear section of the front longitudinal beam of the vehicle of the present application comprises: a positive force transmission part, the front longitudinal beam, the positive force transmission part and the middle channel are sequentially connected along the length direction of the vehicle; side force transmission parts, two side force transmission parts are symmetrically arranged on both sides of the positive force transmission part along the width direction of the vehicle, one end of the side force transmission part is connected with the positive force transmission part along the width direction of the vehicle, and the other end is connected with the A-pillar lower inner plate and the rocker beam on the corresponding side. The present application can transmit the collision energy to the A-pillar lower inner plate, the rocker beam and the middle channel, reduce the number of parts, reduce the manufacturing cost, reduce the process complexity of vehicle connection manufacturing, and improve the transmission efficiency of the collision energy.

Description

Technical Field

[0001] This invention relates to the field of vehicle body structure, specifically providing a rear section of the front longitudinal beam of a vehicle and the vehicle itself. Background Technology

[0002] Because the batteries in existing pure electric vehicles occupy most of the space under the vehicle floor, it is impossible to design and add floor longitudinal beam structures under the floor, making it difficult to transfer collision energy to the longitudinal beams, the rear structure of the front longitudinal beams and the body sill beams.

[0003] The existing rear section of the front longitudinal beam is connected to various parts of the vehicle body through multiple connecting structures. Too many connecting parts will hinder the efficiency of collision energy transfer. The existing subframe is mounted on the front longitudinal beam. After a collision, the front longitudinal beam will collapse. The collapse of the front longitudinal beam may cause the subframe to detach from the front longitudinal beam and thus be unable to deform, thus failing to absorb collision energy.

[0004] Accordingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] This invention aims to solve the aforementioned technical problem, namely, the difficulty in transmitting vehicle collision energy to the longitudinal beam, the rear structure of the front longitudinal beam, and the sill beam in the prior art. To this end, this invention provides a rear section of the front longitudinal beam for a vehicle. The vehicle includes a front longitudinal beam and a central tunnel arranged along the length of the vehicle, and an A-pillar lower inner panel and a sill beam symmetrically arranged along the width of the vehicle. The rear section of the front longitudinal beam includes: a positive force transmission section, wherein the front longitudinal beam, the positive force transmission section, and the central tunnel are sequentially connected along the length of the vehicle; and a side force transmission section, wherein two side force transmission sections are symmetrically arranged on both sides of the positive force transmission section along the width of the vehicle, with one end of the side force transmission section connected to the positive force transmission section along the width of the vehicle, and the other end connected to the corresponding side A-pillar lower inner panel and sill beam.

[0006] In the specific embodiment of the vehicle having a front longitudinal beam rear section, the positive force transmission part has a protrusion along the length direction of the vehicle, and the upper surface of the protrusion along the height direction of the vehicle is used to connect with the central channel.

[0007] In the specific embodiment of the aforementioned vehicle front longitudinal beam rear section, the protrusion approaches the central channel along the length direction of the vehicle, while the two edges of the protrusion gradually approach the central channel along the width direction of the vehicle.

[0008] In the specific embodiment of the aforementioned vehicle front longitudinal beam rear section, the protrusion is symmetrically arranged along the width direction of the vehicle, and the protrusion is "inverted trapezoidal" in the plane formed by the width direction and the length direction of the vehicle.

[0009] In the specific embodiment of the aforementioned rear section of the front longitudinal beam of the vehicle, as the protrusion approaches the central channel along the length direction of the vehicle, the height of the upper surface of the protrusion gradually decreases along the height direction of the vehicle.

[0010] In the specific embodiment of the vehicle having a front longitudinal beam rear section, the protrusion extends along the length direction of the vehicle to form a connecting boss, which is used to connect with the body of the central channel.

[0011] In the specific embodiment of the aforementioned rear section of the front longitudinal beam of a vehicle, the rear section of the front longitudinal beam further includes: a first diagonal brace, which is disposed on the side force transmission part and is inclined from the connection point between the side force transmission part and the front longitudinal beam towards the sill beam along the width direction of the vehicle and towards the sill beam along the length direction of the vehicle; and / or a second support rib, which is disposed on the side force transmission part and the front force transmission part and extends along the width direction of the vehicle; and / or a third support rib, which is disposed on the side force transmission part and the front force transmission part and has an angle with at least a portion of the first diagonal brace and the second support rib.

[0012] In the specific embodiment of the vehicle having a front longitudinal beam rear section component, the front longitudinal beam rear section component further includes: a subframe rear mounting point, which is located at the bottom of the positive force transmission part along the height direction of the vehicle and is used to mount the subframe.

[0013] In the specific embodiment of the vehicle having a rear section of the front longitudinal beam, the rear section of the front longitudinal beam further includes a support plate, which is disposed on the side of the subframe rear mounting point near the battery hanging point, and is located between the subframe rear mounting point and the battery hanging point.

[0014] In the specific embodiment of the aforementioned vehicle front longitudinal beam rear section component, the front longitudinal beam rear section component further includes: a wire passage groove, which is disposed at the bottom of the positive force transmission part along the height direction of the vehicle, and the wire passage groove is connected to the central channel, through which high voltage wires and / or oil pipes enter the central channel.

[0015] In the specific embodiment of the aforementioned vehicle front longitudinal beam rear section component, the front longitudinal beam rear section component further includes: a water quick-connect coupling, which is located at the bottom of the positive force transmission section along the height direction of the vehicle.

[0016] In the specific embodiment of the vehicle's front longitudinal beam rear section, the water quick-connect connector is set in the cable tray, dividing the cable tray into two grooves, through which the high-voltage line and oil pipe respectively pass.

[0017] In the specific embodiment of the aforementioned vehicle front longitudinal beam rear section, the positive force transmission part and the two side force transmission parts are integral castings.

[0018] A vehicle comprising the rear section of the front longitudinal beam of any of the above-mentioned vehicles.

[0019] Solution 1. A rear section of a front longitudinal beam for a vehicle, characterized in that the rear section of the front longitudinal beam includes: a positive force transmission part, wherein the front longitudinal beam, the positive force transmission part and the central channel are connected sequentially along the length direction of the vehicle; and a side force transmission part, wherein two side force transmission parts are symmetrically arranged on both sides of the positive force transmission part along the width direction of the vehicle, wherein one end of the side force transmission part is connected to the positive force transmission part along the width direction of the vehicle, and the other end is connected to the lower inner plate of the A-pillar and the sill beam on the corresponding side.

[0020] Option 2. The rear section of the front longitudinal beam of the vehicle according to Option 1, characterized in that the positive force transmission part has a protrusion along the length direction of the vehicle, and the upper surface of the protrusion along the height direction of the vehicle is used to connect with the central channel.

[0021] Option 3. The rear section of the front longitudinal beam of the vehicle according to Option 2, characterized in that, while the protrusion approaches the central channel along the length direction of the vehicle, the two edges of the protrusion gradually approach the central channel along the width direction of the vehicle.

[0022] Option 4. The rear section of the front longitudinal beam of the vehicle according to Option 3, characterized in that the protrusion is symmetrically arranged along the width direction of the vehicle, and the protrusion is "inverted trapezoidal" on the plane formed by the width direction and the length direction of the vehicle.

[0023] Option 5. The rear section of the front longitudinal beam of the vehicle according to Option 2, characterized in that, as the protrusion approaches the central channel along the length direction of the vehicle, the height of the upper surface of the protrusion gradually decreases along the height direction of the vehicle.

[0024] Option 6. The rear section of the front longitudinal beam of the vehicle according to Option 2, characterized in that the protrusion extends along the length direction of the vehicle to form a connecting boss, which is used to connect with the body of the central channel.

[0025] Option 7. The rear section of the front longitudinal beam of the vehicle according to Option 1, characterized in that the rear section of the front longitudinal beam further includes: a first diagonal brace, the first diagonal brace being disposed on the side force transmission part, the first diagonal brace being inclined from the connection point between the side force transmission part and the front longitudinal beam along the width direction of the vehicle towards the sill beam while simultaneously inclining along the length direction of the vehicle towards the sill beam; and / or a second support rib, the second support rib being disposed on the side force transmission part and the front force transmission part, the second support rib extending along the width direction of the vehicle; and / or a third support rib, the third support rib being disposed on the side force transmission part and the front force transmission part, having an included angle with at least a portion of the first diagonal brace and the second support rib.

[0026] Solution 8. The rear section of the front longitudinal beam of the vehicle according to Solution 1, characterized in that the rear section of the front longitudinal beam further includes: a subframe rear mounting point, which is located at the bottom of the positive force transmission part along the height direction of the vehicle and is used to mount the subframe.

[0027] Solution 9. The rear section of the front longitudinal beam of the vehicle according to Solution 8, characterized in that the rear section of the front longitudinal beam further includes: a support plate, the support plate being disposed on the side of the subframe rear mounting point near the battery hanging point, located between the subframe rear mounting point and the battery hanging point.

[0028] Option 10. The rear section of the front longitudinal beam of the vehicle according to Option 1, characterized in that the rear section of the front longitudinal beam further includes: a wire passage groove, which is disposed at the bottom of the positive force transmission part along the height direction of the vehicle, and the wire passage groove is connected to the central channel, through which the high voltage line and / or oil pipe enter the central channel.

[0029] Solution 11. The rear section of the front longitudinal beam of the vehicle according to Solution 10, characterized in that the rear section of the front longitudinal beam further includes: a water quick-connect coupling, the water quick-connect coupling being located at the bottom of the positive force transmission section along the height direction of the vehicle.

[0030] Scheme 12. The rear section of the front longitudinal beam of the vehicle according to Scheme 11, characterized in that the water quick-connect connector is set in the cable groove, dividing the cable groove into two grooves, and the high-voltage line and the oil pipe respectively pass through one of the grooves.

[0031] Scheme 13. The rear section of the front longitudinal beam of the vehicle according to Scheme 1, characterized in that the positive force transmission part and the two side force transmission parts are integral castings.

[0032] Scheme 14. A vehicle, characterized in that it includes the rear section of the front longitudinal beam of any one of Schemes 1-13 above.

[0033] By adopting the above technical solution, this invention eliminates the original floor longitudinal beam and skid plate, forming a new force transmission path. The rear section of the front longitudinal beam includes a forward force transmission section and a side force transmission section. The forward force transmission section transfers the collision energy from the front longitudinal beam to the central tunnel, while the side force transmission section transfers the collision energy from the front longitudinal beam to the lower A-pillar inner panel and sill beam, thus realizing the transfer of collision energy to the vehicle body. Collision energy can also be transferred along the width direction of the vehicle via the forward force transmission section, dispersing the collision energy and avoiding the phenomenon of excessively concentrated force on the rear section of the front longitudinal beam and sill beam, which would lead to damage due to concentrated force. This meets the structural requirements for frontal ODB (Offset Deformation Barrier) and 25% small offset collision tests. Furthermore, this invention eliminates the skid plate, directly transferring collision energy to the central tunnel, reducing the number of parts, lowering manufacturing costs, reducing the complexity of vehicle connection manufacturing processes, and improving the efficiency of collision energy transfer. Attached Figure Description

[0034] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0035] Figure 1This is a schematic diagram of the assembly of the rear section of the front longitudinal beam with other parts of the vehicle body in this invention.

[0036] Figure 2 This is a schematic diagram of the rear view structure of the rear section of the front longitudinal beam in this invention;

[0037] Figure 3 This is a schematic diagram of the front view structure of the rear section of the front longitudinal beam in this invention;

[0038] Figure 4 This is a rear view of the rear section of the front longitudinal beam in this invention;

[0039] Figure 5 yes Figure 4 A cross-sectional view at point AA, showing the second supporting rib;

[0040] Figure 6 This is a schematic diagram of the rear section of the front longitudinal beam in this invention from a certain perspective, showing the rear mounting point of the subframe;

[0041] Figure 7 This is a schematic diagram of the structure of the rear section of the front longitudinal beam before installation with the subframe in this invention;

[0042] Figure 8 This is a schematic diagram of the structure of the rear section of the front longitudinal beam after it is installed with the subframe in this invention;

[0043] Figure 9 This is a schematic diagram of the force transmission path between the rear section of the front longitudinal beam and the front longitudinal beam in this invention.

[0044] Figure 10 This is a schematic diagram of the force transmission path between the rear section of the front longitudinal beam and the subframe in this invention.

[0045] In the diagram: 1. Front longitudinal beam, 2. Central channel, 3. Lower inner panel of A-pillar, 4. Sill beam, 5. Rear section of front longitudinal beam, 6. Positive force transmission part, 7. Side force transmission part, 8. Protrusion, 9. Rear mounting point of subframe, 10. Support plate, 11. Cable tray, 12. Water quick-connect connector, 13. First diagonal brace, 14. Second support brace, 15. Third support brace, 16. Battery hanging point, 17. Reinforcement part, 18. Connecting boss, 19. Body, 20. Connecting piece, 21. Main body. Detailed Implementation

[0046] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0047] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the relevant devices or elements must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Furthermore, in order to more clearly demonstrate the core technical solution of the present invention, the description of known structures such as the front longitudinal beam, the inner plate under the A-pillar, and the sill beam is omitted in the following description. However, this omission is only for the convenience of description and does not mean that the front longitudinal beam, the inner plate under the A-pillar, and the sill beam can be without these structures.

[0050] like Figure 1-9 As shown, the width direction of the vehicle is represented by X, the length direction by Y, and the height direction by Z. This invention proposes a rear section of the front longitudinal beam for a vehicle. The vehicle includes a front longitudinal beam 1 and a central passageway 2 arranged along the length direction, and an A-pillar lower inner plate 3 and a sill beam 4 symmetrically arranged along the width direction. The rear section of the front longitudinal beam 5 includes: a positive force transmission part 6, with the front longitudinal beam 1, the positive force transmission part 6, and the central passageway 2 connected sequentially along the length direction of the vehicle; and two side force transmission parts 7, symmetrically arranged on both sides of the positive force transmission part 6 along the width direction of the vehicle. One end of each side force transmission part 7 is connected to the positive force transmission part 6 along the width direction, and the other end is connected to the corresponding side A-pillar lower inner plate 3 and sill beam 4. Both the positive force transmission part 6 and the side force transmission parts 7 are castings.

[0051] In this embodiment, to address the problem of existing pure electric vehicles' inability to transfer collision energy to the longitudinal beams, the rear structure of the front longitudinal beams, and the body sill beams, the original floor longitudinal beams and skid plates are eliminated, forming a new force transmission path, such as... Figure 9As shown, the rear section 5 of the front longitudinal beam includes a forward force transmission section 6 and a side force transmission section 7. The forward force transmission section 6 transmits the collision energy from the front longitudinal beam 1 to the central channel 2, and then transmits it rearward along the central channel 2. The side force transmission section 7 transmits the collision energy from the front longitudinal beam 1 to the lower inner panel 3 of the A-pillar and the sill beam 4, thus realizing the transmission of collision energy to the vehicle body. The collision energy can also be transmitted along the width direction of the vehicle on the forward force transmission section 6, which disperses the transmission of collision energy and avoids the phenomenon that the rear section of the front longitudinal beam and the sill beam are damaged due to the concentration of force due to the excessive concentration of the transmission path. This meets the structural requirements of frontal collision ODB (Offset Deformation Barrier) and 25% small offset collision.

[0052] This invention eliminates the skid plate, directly transferring collision energy to the central tunnel 2. This reduces the number of parts, lowers manufacturing costs, and simplifies the manufacturing process of vehicle connections. Eliminating the skid plate allows for a larger cross-section of the central tunnel, enabling the use of higher-strength hot-formed steel to enhance the overall strength of the vehicle body structure. Furthermore, the increased cross-section of the central tunnel increases the contact area between the central tunnel and the force transmission component, meaning the force transmission area between the force transmission component 6 and the central tunnel 2 is larger, thus improving the efficiency of collision energy transfer.

[0053] Furthermore, such as Figure 2 As shown, the positive force transmission part 6 is provided with a main body 21 and a protrusion 8 along the length direction of the vehicle. The protrusion 8 is located on the side closer to the central channel 2 along the length direction of the vehicle, and the upper surface of the protrusion 8 along the height direction of the vehicle is used to connect with the central channel 2. The dimension of the protrusion 8 along the length direction of the vehicle is 210mm. Without departing from the principle of the present invention, those skilled in the art can flexibly adjust the dimension according to the actual situation, and the technical solutions after these adjustments will all fall within the protection scope of this application. Figure 1 As shown, the original central channel did not have a connecting piece 20. The current transmission path would result in a larger collision energy being transmitted to the positive force transmission part 6. If the original central channel is still used to connect with the protrusion 8, the edge of the central channel would curl up. To avoid this situation, a connecting piece 20 is provided on the central channel 2. The connecting piece 20 is covered on the upper surface of the protrusion 8 to prevent curling.

[0054] The connecting piece 20 on the middle channel 2 covers the protrusion 8, and then the connecting piece 20 is connected to the protrusion 8 by the connection process of FDS flow drill screws. Since the protrusion 8 is covered by a connecting piece 20, and the connecting piece 20 and the other parts of the middle channel 2 are all hot-formed steel, the structural strength of the protrusion 8 will be increased, which can compensate for the weakening of the structural strength of the positive force transmission part 6 by the through groove 11.

[0055] In addition, the connection between the protrusion 8 and the central channel 2 can increase the connection area between the positive force transmission part 6 and the central channel 2, reduce deformation in the cockpit, and improve the structural stability of the positive force transmission part 6.

[0056] Furthermore, such as Figure 2 As shown, while the protrusion 8 approaches the central channel 2 along the length of the vehicle, its two edges along the width of the vehicle gradually approach the central channel 2. This facilitates the transfer of collision energy from the front longitudinal beam 1 to the central channel 2 along the protrusion 8. When viewed from above, the two edges of the protrusion 8 along the width of the vehicle slope towards the central channel 2 from the connection point between the side force transmission part 7 and the front longitudinal beam 1. In the prior art, after the collision energy from the front longitudinal beam is transferred to the rear section of the front longitudinal beam, it is first transferred along the width of the vehicle body along the rear section of the front longitudinal beam, and then transferred along the length of the vehicle body to the skid plate, and then transferred rearward through the skid plate. In this application, the collision energy from the front longitudinal beam can be directly transferred to the central channel 2 along the two edges of the protrusion 8 along the width of the vehicle, shortening the force transmission path and improving the energy transfer efficiency.

[0057] Furthermore, such as Figure 2 , Figure 4 and Figure 9 As shown, the protrusion 8 is symmetrically arranged along the width direction of the vehicle, and the protrusion 8 is in the shape of an inverted trapezoid on the plane formed by the width direction and the length direction of the vehicle. When viewed from above, the protrusion 8 is in the shape of an inverted trapezoid. The side of the protrusion 8 away from the central channel 2 along the length direction of the vehicle is the upper base of the inverted trapezoid, and the side of the protrusion 8 closer to the central channel 2 along the length direction of the vehicle is the lower base of the inverted trapezoid. The length of the upper base is greater than the length of the lower base. The two sides of the protrusion 8 close to the central channel 2 along the width direction of the vehicle are the waists of the inverted trapezoid. Because the protrusion 8 is symmetrically arranged, it is an isosceles inverted trapezoid. The waists of the two inverted trapezoids slope from the connection point between the positive force transmission part 6 and the front longitudinal beam 1 towards the central channel 2. The two sloped waists of the two inverted trapezoids shorten the force transmission path, which can more quickly transfer the collision energy from the front longitudinal beam 1 to the central channel 2. Furthermore, compared to the original transmission path between the rear section of the front longitudinal beam and the skid plate, the lower base of the "inverted trapezoid" in this application has a larger contact area with the middle channel 2, making the transmission of collision energy more efficient.

[0058] Furthermore, such as Figure 2 As shown, while the protrusion 8 approaches the central channel 2 along the length direction of the vehicle, the height of the upper surface of the protrusion 8 along the height direction of the vehicle gradually decreases until it is flush with the connection position of the central channel 2. This creates a smooth transition in the height difference between the protrusion 8 and the central channel 2, which facilitates installation and also avoids the encroachment on the interior space caused by the uniform height of the protrusion 8.

[0059] Furthermore, such as Figure 1-2As shown, the central channel 2 includes a central channel body 19 and a connecting piece 20. A connecting boss 18 extends from the protrusion 8 along the length of the vehicle. The connecting boss 18 connects to the central channel body 19, enhancing the connection strength between the protrusion 8 and the central channel body 19. The addition of the connecting boss 18 to the central channel body 19, based on the connection between the connecting piece 20 and the upper surface of the protrusion 8, further strengthens the connection between the positive force transmission part 6 and the central channel 2, making the connection more robust.

[0060] Furthermore, such as Figure 2-4 As shown, the rear section 5 of the front longitudinal beam also includes a first diagonal brace 13. The first diagonal brace 13 is disposed on the side force transmission part 7. The first diagonal brace 13 is inclined from the connection point between the side force transmission part 7 and the front longitudinal beam 1 along the width direction of the vehicle towards the sill beam 4, and simultaneously inclined along the length direction of the vehicle towards the sill beam 4. The first diagonal brace 13 is continuous along the width direction of the vehicle and connected along the length direction of the vehicle. The diagonally disposed first diagonal brace 13 can quickly transfer the collision energy from the front longitudinal beam 1 to the lower inner panel 3 of the A-pillar and the sill beam 4, improving energy transmission efficiency. During the collision and compression process, the front longitudinal beam 1 will warp upwards. The first diagonal brace 13 can effectively resist the torque or bending moment generated by the front longitudinal beam 1 during the collision, resist the lifting of the front compartment of the vehicle, and reduce vehicle deformation. The first diagonal brace 13 has a structure that is closed on three sides and open on one side, realizing a lightweight design and facilitating manufacturing.

[0061] Furthermore, such as Figure 2-5 As shown, the rear section 5 of the front longitudinal beam also includes a second support rib 14, which is disposed on the side force transmission section 7 and the front force transmission section 6. The second support rib 14 extends approximately along the width direction of the vehicle. The second support ribs 14 on the side force transmission section 7 and the front force transmission section 6 are continuously disposed without interruption, and the second support ribs 14 are connected along the length direction of the vehicle. The second support rib 14 is equivalent to a beam, which can increase the lateral rigidity of the rear section 5 of the front longitudinal beam, thereby preventing the rear section 5 of the front longitudinal beam from breaking during a collision. Furthermore, such a rib orientation can ensure that the energy can be effectively transferred to both sides when the vehicle is involved in a collision.

[0062] like Figure 4 As shown, the rear section 5 of the front longitudinal beam also includes a third support rib 15, which is disposed on the side force transmission section 7 and the front force transmission section 6, and forms an angle with at least a portion of the first diagonal brace rib 13 and the second support rib 14. Collision energy can be conducted along the third support rib 15, improving energy transmission efficiency and also enhancing the torsional resistance of the vehicle body.

[0063] Furthermore, such as Figure 6-8 and Figure 10As shown in the figure, the rear section part 5 of the front longitudinal beam further includes: a rear subframe mounting point 9, which is arranged at the bottom of the positive force transmission part 6 in the height direction of the vehicle and is used for mounting the subframe to form a new force transmission path; the front subframe mounting point is arranged on the front longitudinal beam 1, and the rear subframe mounting point 9 is arranged at the bottom of the positive force transmission part 6. When a collision occurs, the subframe can undergo a V-shaped bend, and the collision energy is transmitted to the rear section part 5 of the front longitudinal beam through the two rear subframe mounting points 9 and then transmitted to the middle channel 2 or transmitted to the inner lower panel 3 of the A-pillar and the sill beam 4. Compared with the original scheme of mounting the subframe on the front longitudinal beam, the present invention can make more full use of the subframe as an energy absorption path and avoid the situation of insufficient energy absorption caused by the detachment of the subframe.

[0064] At the same time, above the rear subframe mounting point 9 is the positive force transmission part 6 that can transmit force. The rear subframe mounting point 9 can transmit the collision energy received by the subframe to the positive force transmission part 6, and then transmit it to the middle channel 2 or transmit it to the inner lower panel of the A-pillar and the sill beam 4 through the positive force transmission part 6, so as to avoid the collision energy of the rear subframe mounting point 9 being too large and causing the rear subframe mounting point 9 to invade the battery hanging point 16 or damage the battery structure of the vehicle body.

[0065] Furthermore, as Figure 4 and Figure 6-8 shown, the rear section part 5 of the front longitudinal beam further includes: a support plate 10, which is arranged on one side of the rear subframe mounting point 9 close to the battery hanging point 16 and is located between the rear subframe mounting point 9 and the battery hanging point 16. The battery is installed at the bottom of the vehicle. Since the rear subframe mounting point 9 is arranged at the bottom of the positive force transmission part 6, the distance between the rear subframe mounting point 9 and the battery hanging point 16 becomes smaller. When a collision occurs, if the position of the subframe moves, it may hit and invade the battery. To avoid this situation, a support plate 10 is arranged between the rear subframe mounting point 9 and the battery hanging point 16.

[0066] If the collision energy of the subframe is too large and causes the subframe to move in the direction of the battery, before colliding with the battery, the subframe will first contact the support plate 10, and the support plate 10 can absorb a part of the collision energy from the subframe, block the subframe from occupying the battery space, and protect the battery from being damaged by impact during the collision.

[0067] In addition, the support plate 10 is provided with reinforcing ribs, which extend in all directions, Figure 4 and Figure 7 the reinforcing ribs in

[0068] It should be noted that the size and shape of the support plate 10 in the figure are not limitations to the present invention. Without departing from the basic principle of the present invention, those skilled in the art can adjust the size and shape of the support plate 10, which does not deviate from the principle of the present invention, and thus will fall within the protection scope of the present invention. In addition, those skilled in the art can select the position, direction and number of the reinforcing ribs according to the actual situation; of course, in this solution, it is preferable to set the reinforcing ribs in a "rice" shape.

[0069] Furthermore, as Figure 1-4 shown, the rear section part 5 of the front longitudinal beam further includes: a wire trough 11, which is arranged at the bottom of the positive force transmission part 6 along the height direction of the vehicle, and the wire trough 11 is connected to the middle channel 2, and the high-voltage wire and / or oil pipe pass through the wire trough 11 and enter the middle channel 2.

[0070] In the original vehicle body, in order to transfer the collision energy and improve the strength of the rear section part 5 of the front longitudinal beam, the space corresponding to the middle channel 2 of the rear section part 5 of the front longitudinal beam is completely occupied. One end along the width direction of the vehicle is the electrical terminal quick-change bracket of the battery, the other end is the water terminal quick-change bracket, and above the middle position is the air-conditioning water inlet, without leaving any space for the high-voltage wire and oil pipe to run. Therefore, the high-voltage wire and oil pipe are arranged on both sides of the vehicle body. The high-voltage wire is used to supply power to the front electronic differential lock (EDS) and the high-voltage power distribution unit (PDU). When a collision occurs, the wheel squeezes towards the vehicle body, which is likely to squeeze the high-voltage wire and oil pipe, resulting in damage to the high-voltage wire and oil pipe, causing electric leakage, power loss or generating sparks.

[0071] To avoid this situation, a wire trough 11 is arranged at the bottom of the positive force transmission part 6 and is connected to the middle channel 2. The middle channel 2 can be arched correspondingly along the height direction of the vehicle to make way for the high-voltage wire and / or oil pipe. The high-voltage wire and / or oil pipe pass through the wire trough 11 and enter the middle channel 2. In this way, even if a collision occurs to the vehicle and the wheel invades towards the vehicle body, the high-voltage wire and oil pipe will not be squeezed, improving the safety performance of the vehicle and ensuring the safety of users. In this application, since the sled plate is cancelled, the cross-section of the middle channel 2 can be increased. On the basis of increasing the cross-section of the middle channel 2, an arch can be made to cooperate with the wire trough 11 to place the high-voltage wire and oil pipe.

[0072] The cable channel 11 is located at the bottom of the positive force transmission section 6, occupying part of the volume of the positive force transmission section 6, which weakens the structural strength of the positive force transmission section 6. However, since the cross-section of the central channel 2 is increased in this invention, and a connecting piece is covered on the upper surface of the protrusion 8, the weakening of the structural strength of the positive force transmission section 6 by the cable channel 11 can be compensated. In addition, a first diagonal brace 13, a second support rib 14, and a third support rib 15 are provided so that the collision energy on the positive force transmission section 6 can be transmitted in time along the first diagonal brace rib 13, the second support rib 14, and the third support rib 15, avoiding excessive collision energy on the positive force transmission section 6 that could cause damage, and minimizing the impact of the cable channel 11 on the structural strength and collision energy transmission of the rear section of the front longitudinal beam 5.

[0073] It should be noted that the size and shape of the wire groove 11 in the figure are not a limitation of the present invention. Without departing from the basic principle of the present invention, those skilled in the art can adjust the size and shape of the wire groove 11, which does not depart from the principle of the present invention, and therefore all such adjustments will fall within the protection scope of the present invention.

[0074] In order to house the high-voltage wires and oil pipes on both sides of the vehicle body, the original vehicle body structure has cable trays on both sides of the rear section of the front longitudinal beam 5 near the sill beam 4. These trays are used to house the high-voltage wires and oil pipes respectively. In order to avoid affecting the energy transfer from the rear section of the front longitudinal beam 5 to the sill beam 4 and the structural strength of the rear section of the front longitudinal beam 5, a sill reinforcement plate is installed below the cable trays. One end of the sill reinforcement plate is connected to the bottom of the rear section of the front longitudinal beam 5 along the width direction of the vehicle, and the other end is connected to the bottom of the sill beam 4. This plate is used to transfer energy and support the rear section of the front longitudinal beam 5.

[0075] In this application, a cable tray 11 is provided, so there is no need to provide a cable routing tray. The rear section 5 of the front longitudinal beam is provided with a reinforcing part 17 at the position corresponding to the original cable routing tray. The reinforcing part 17 in this application is integrated with the side force transmission part. Compared with the original sill reinforcing plate, this application reduces the sill reinforcing plate, reduces the connection process, improves the energy transmission efficiency to the sill beam 4, and improves the structural strength of the rear section 5 of the front longitudinal beam.

[0076] Furthermore, such as Figure 1-4As shown, the rear section 5 of the front longitudinal beam also includes a water quick-connect connector 12, which is located at the bottom of the positive force transmission section 6 along the height direction of the vehicle. The water quick-connect connector 12 has machined threads. In the original vehicle, a battery cooling water end battery swapping bracket needs to be installed on the vehicle body before the water quick-connect connector is plugged in. Too many parts will accumulate assembly tolerances, leading to battery swapping failure or coolant leakage. In this embodiment, the cooling water end battery swapping bracket is removed, and the cooling water connector on the battery is directly connected to the water quick-connect connector 12 on the rear section 5 of the front longitudinal beam. After removing the battery swapping bracket, because there is one less part in the middle, the accumulation of matching tolerances is reduced, the installation accuracy and matching accuracy are improved, and the production efficiency is increased.

[0077] like Figure 1-4 As shown, since the cable tray 11 is also located at the bottom of the positive force transmission section 6, the water quick-connect fitting 12 can be placed in the cable tray 11. The water quick-connect fitting 12 divides the cable tray 11 into two recesses, with the high-voltage line and oil pipe passing through one of the recesses respectively. This improves space utilization, and the water quick-connect fitting 12 also serves to separate the high-voltage line and oil pipe.

[0078] It should be noted that, Figure 4 The quick-connect water connector 12 is located in the middle of the cable tray 11. This is not a limitation of the present invention. Without departing from the basic principle of the present invention, those skilled in the art can place the quick-connect water connector 12 in other positions of the cable tray 11 or in other positions outside the cable tray 11. This does not depart from the principle of the present invention and therefore all fall within the protection scope of the present invention.

[0079] Furthermore, the positive force transmission unit 6 and the two side force transmission units 7 are integral castings. The entire casting is a single unit, integrating individual parts, which reduces the need for connectors when connecting various components, greatly reduces the part connection process, lowers equipment investment, and improves production efficiency.

[0080] The existing front longitudinal beam rear section casting structure is not a single-piece component, but includes multiple connecting structures. These connecting structures increase the manufacturing difficulty of the component itself and the matching difficulty between different components. Furthermore, because different components are connected through these connecting structures, this leads to a decrease in collision energy transfer efficiency. A single-piece structure can eliminate many of the original connecting structures, such as skid plates, sill reinforcement plates, and connectors in the front longitudinal beam rear section casting structure, thereby improving energy transfer efficiency.

[0081] A vehicle comprising the rear section of the front longitudinal beam of any of the above-mentioned vehicles.

[0082] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0083] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A rear section of a front longitudinal beam for a vehicle, characterized in that, The rear section of the front longitudinal beam (5) includes: The positive force transmission section (6), the front longitudinal beam (1), the positive force transmission section (6) and the middle channel (2) are connected sequentially along the length of the vehicle; Side force transmission unit (7): Two side force transmission units (7) are symmetrically arranged on both sides of the front force transmission unit (6) along the width direction of the vehicle. One end of each side force transmission unit (7) is connected to the front force transmission unit (6) along the width direction of the vehicle, and the other end is connected to the lower inner plate (3) of the A-pillar and the sill beam (4) on the corresponding side. The positive force transmission part (6) has a protrusion (8) along the length direction of the vehicle, and the upper surface of the protrusion (8) along the height direction of the vehicle is used to connect with the middle channel (2). Wherein, the protrusion (8) approaches the central channel (2) along the length direction of the vehicle, and the two edges of the protrusion (8) gradually approach the central channel (2) along the width direction of the vehicle. The protrusion (8) is symmetrically arranged along the width direction of the vehicle, and the protrusion (8) is in the shape of an inverted trapezoid on the plane formed by the width direction and the length direction of the vehicle. As the protrusion (8) approaches the central channel (2) along the length direction of the vehicle, the height of the upper surface of the protrusion (8) gradually decreases along the height direction of the vehicle. The protrusion (8) extends along the length of the vehicle to form a connecting boss (18), which is used to connect with the body of the central channel (2).

2. The rear section of the front longitudinal beam of the vehicle according to claim 1, characterized in that, The rear section of the front longitudinal beam (5) also includes: The first diagonal brace (13) is disposed on the side force transmission part (7). The first diagonal brace (13) is inclined from the connection point between the side force transmission part (7) and the front longitudinal beam (1) towards the sill beam (4) along the width direction of the vehicle and simultaneously towards the sill beam (4) along the length direction of the vehicle; and / or The second support rib (14) is disposed on the side force transmission part (7) and the front force transmission part (6), and the second support rib (14) extends along the width direction of the vehicle; and / or The third support rib (15) is disposed on the side force transmission part (7) and the front force transmission part (6) and has an angle with at least a portion of the first diagonal brace rib (13) and the second support rib (14).

3. The rear section of the front longitudinal beam of the vehicle according to claim 1, characterized in that, The rear section of the front longitudinal beam (5) also includes: The subframe rear mounting point (9) is located at the bottom of the positive force transmission part (6) along the height direction of the vehicle and is used to mount the subframe.

4. The rear section of the front longitudinal beam of the vehicle according to claim 3, characterized in that, The rear section of the front longitudinal beam (5) also includes: Support plate (10) is disposed on the side of the subframe rear mounting point (9) near the battery hanging point (16), and is located between the subframe rear mounting point (9) and the battery hanging point (16).

5. The rear section of the front longitudinal beam of the vehicle according to claim 1, characterized in that, The rear section of the front longitudinal beam (5) also includes: The wire passage (11) is located at the bottom of the positive force transmission part (6) along the height direction of the vehicle. The wire passage (11) is connected to the middle channel (2). The high voltage line and / or oil pipe enter the middle channel (2) through the wire passage (11).

6. The rear section of the front longitudinal beam of the vehicle according to claim 5, characterized in that, The rear section of the front longitudinal beam (5) also includes: Water quick-connector (12) is located at the bottom of the positive force transmission part (6) along the height direction of the vehicle.

7. The rear section of the front longitudinal beam of the vehicle according to claim 6, characterized in that, The water quick-connector (12) is installed in the cable groove (11), which divides the cable groove (11) into two grooves, through which the high-voltage line and the oil pipe pass respectively.

8. The rear section of the front longitudinal beam of the vehicle according to claim 1, characterized in that, The positive force transmission part (6) and the two side force transmission parts (7) are integral castings.

9. A vehicle, characterized in that, The rear section of the front longitudinal beam of the vehicle included in any one of claims 1-8.

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