Torsion box assembly and vehicle

Abstract

The invention provides a torsion box assembly and a vehicle, and belongs to the technical field of vehicle parts, the torsion box assembly comprises a cabin longitudinal beam rear section, an outer torsion box and an inner torsion box which are sequentially connected from outside to inside, the front end of the cabin longitudinal beam rear section is connected with a cabin longitudinal beam front section, the outer end of the outer torsion box is connected with a threshold beam, and the inner end of the inner torsion box is connected with a front floor longitudinal beam; the front side wall of the outer torsion box gradually inclines backwards from inside to outside, the front side wall of the inner torsion box gradually inclines backwards from outside to inside, and the front side wall of the outer torsion box, the rear side wall of the outer torsion box and the cabin longitudinal beam rear section define a first triangular frame. A second triangular frame is defined by the front side wall of the inner torsion box, the rear side wall of the inner torsion box and the cabin longitudinal beam rear section. Compared with the prior art, the torsion box assembly has higher structural strength, a better force transmission path and enough crumple buffer space, the size of the torsion box assembly is smaller on the premise that the basic safety performance of a vehicle is met, and more space can be released for installation of a power battery pack.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle components, and particularly relates to a torque box assembly and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, higher requirements are put forward for the design of the body structure of new energy vehicles. The torque box is located in the joint area between the engine compartment and the sill beam. In addition to realizing the function of the joint at the key part, it can also decompose and transmit the collision force when the vehicle is impacted, improving the collision safety.

[0003] In existing new energy vehicles, the torque box structure of traditional fuel vehicles is still used. The torque box structure in traditional fuel vehicles is relatively large and adjacent to the installation space of the power battery pack. Since the space formed by the vehicle chassis is limited, the relatively large torque box has a negative impact on the increase in the volume of the power battery pack, which is not conducive to improving the cruising range of the vehicle. Summary of the Invention

[0004] An embodiment of the present invention provides a torque box assembly and a vehicle, aiming to solve the problem that the existing torque box structure is too large in volume and it is difficult to expand the installation space of the power battery pack.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, a torque box assembly is provided, including:

[0007] The rear section of the engine compartment longitudinal beam, the outer torque box, and the inner torque box that are sequentially connected from the outside to the inside. The front end of the rear section of the engine compartment longitudinal beam is connected to the front section of the engine compartment longitudinal beam. The outer end of the outer torque box is connected to the sill beam. The inner end of the inner torque box is connected to the front floor longitudinal beam;

[0008] The front side wall of the outer torque box gradually inclines backward from the inside to the outside. The front side wall of the inner torque box gradually inclines backward from the outside to the inside. The front side wall of the outer torque box, the rear side wall of the outer torque box, and the rear section of the engine compartment longitudinal beam enclose a first triangular frame. The front side wall of the inner torque box, the rear side wall of the inner torque box, and the rear section of the engine compartment longitudinal beam enclose a second triangular frame.

[0009] In combination with the first aspect, in a possible implementation manner, the front side wall of the outer torque box, the rear side wall of the outer torque box, the front side wall of the inner torque box, and the rear side wall of the inner torque box enclose a third triangular frame.

[0010] In combination with the first aspect, in a possible implementation manner, the rear section of the engine compartment longitudinal beam extends in the front-rear direction and is a box-shaped member, and the lower side wall of the rear section of the engine compartment longitudinal beam arches downward.

[0011] In some embodiments, the rear section of the engine compartment longitudinal beam is a box-shaped structure with an upward opening.

[0012] In some embodiments, the torsion box assembly further includes a front enclosure reinforcing beam extending in the inner and outer direction, which is located above the rear section of the engine compartment longitudinal beam, the outer torsion box and the inner torsion box; the front side of the front enclosure reinforcing beam is connected to the front section of the engine compartment longitudinal beam, and the lower part of the front enclosure reinforcing beam is connected to the front side wall of the outer torsion box.

[0013] In some embodiments, a battery pack mounting bracket is provided at the bottom of the outer torsion box.

[0014] In some embodiments, a vehicle frame mounting bracket is provided at the bottom of the inner cavity of the inner torsion box, and the vehicle frame mounting bracket includes a mounting plate, a support plate and a mounting sleeve;

[0015] At least three support legs are provided on the outer periphery of the mounting plate, and the support legs are supported and connected to the inner torsion box so as to form a spaced space between the mounting plate and the inner torsion box; the mounting sleeve penetrates through the mounting plate and the inner torsion box; the support plate is disposed in the spaced space and is supported and connected between the mounting sleeve and the inner torsion box.

[0016] In some embodiments, the support heights of two adjacent support legs are different.

[0017] In some embodiments, at least four support legs are provided, and two of the support legs are oppositely arranged in the front and rear direction, and the other two support legs are oppositely arranged in the inner and outer direction;

[0018] A plurality of mounting sleeves are provided, and at least one of the mounting sleeves is located on the distribution path of the front and rear support legs, and at least one of the other mounting sleeves is located on the distribution path of the inner and outer support legs.

[0019] The solution shown in the embodiments of the present application, compared with the prior art, realizes the connection between the engine compartment and the sill beam and the front floor longitudinal beam by connecting the front end of the rear section of the engine compartment longitudinal beam to the front section of the engine compartment longitudinal beam, connecting the outer end of the outer torque box to the sill beam, and connecting the inner end of the inner torque box to the front floor longitudinal beam, meeting the purpose of the joint in the key area. At the same time, since the front side wall of the outer torque box gradually slopes backward from the inside to the outside and the front side wall of the inner torque box gradually slopes backward from the outside to the inside, a first triangular frame and a second triangular frame are respectively formed on the inner and outer sides of the rear section of the engine compartment longitudinal beam. The design of the two triangular frames has the following beneficial effects: First, the two triangular frames have force transmission paths in multiple directions including the front-back direction, the inner-outer direction, and the diagonal direction, and can smoothly transmit and decompose the impact forces from the front, left, and right sides of the vehicle; Second, the design of the two triangular frames strengthens the rear section of the engine compartment longitudinal beam, ensuring that the engine compartment longitudinal beam does not flare out or inwards when transmitting force in the front-back direction, that is, the engine compartment longitudinal beam can collapse smoothly after impact, and the overall structure is not torn, flared out or inwards; Third, the design of the two triangular frames strengthens the rear section of the engine compartment longitudinal beam, improving its bending strength, and ensuring that when transmitting force in the inner-outer direction (i.e., during side impact), the overall engine compartment longitudinal beam is not torn, flared out or inwards. In addition, the boxed structure constructed by the outer torque box and the inner torque box on both sides of the rear section of the engine compartment longitudinal beam can provide a buffer space during the process of the front wheel moving backward and invading the cab during impact.

[0020] Generally speaking, the structural design of the torque box assembly in the present application enables the torque box assembly itself to have higher structural strength, better force transmission paths, and sufficient collapse buffer space. Therefore, on the premise of meeting the basic safety performance of the vehicle, the volume of the torque box assembly is smaller than that of the traditional torque box structure, which can release more space for the installation of the power battery pack, thereby increasing the overall power storage capacity of the power battery module.

[0021] In a second aspect, an embodiment of the present invention also provides a vehicle, including the above-mentioned torque box assembly.

[0022] The solution shown in the embodiments of the present application, compared with the prior art, by adopting the above-mentioned torque box assembly, can effectively reduce the space occupied by the torque box assembly, release more installation space for the power battery pack, increase the overall power storage capacity of the battery module, ultimately increase the cruising range of the whole vehicle, and enhance the market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a top view of the assembly of the torque box assembly provided by the embodiment of the present invention with the front section of the engine compartment longitudinal beam, the sill beam, and the front floor longitudinal beam;

[0024] Figure 2 is a bottom-up perspective view of the assembly of the torque box assembly provided by the embodiment of the present invention with the front section of the engine compartment longitudinal beam, the sill beam, and the front floor longitudinal beam;

[0025] Figure 3 is Figure 2 the enlarged view of part C;

[0026] Figure 4 is the three-dimensional view of the front bulkhead reinforcement beam adopted in the embodiment of the present invention;

[0027] Figure 5 is Figure 1 the three-dimensional view of the torsion box assembly located on the left side in

[0028] Figure 6 is the top view of the torsion box assembly provided by the embodiment of the present invention;

[0029] Figure 7 is Figure 6 the sectional view taken along line A-A of

[0030] Figure 8 is Figure 6 the sectional view taken along line B-B of

[0031] Figure 9 is the top view of the torsion box assembly provided by the embodiment of the present invention, wherein the smaller triangle on the outside represents the first triangular frame, the smaller triangle on the inside represents the second triangular frame, and the two smaller triangles are combined to form the third triangular frame;

[0032] Figure 10 is the three-dimensional view of the rear section of the engine compartment longitudinal beam adopted in the embodiment of the present invention;

[0033] Figure 11 is the exploded view of the rear section of the engine compartment longitudinal beam adopted in the embodiment of the present invention;

[0034] Figure 12 is the three-dimensional view of the outer torsion box adopted in the embodiment of the present invention;

[0035] Figure 13 is the assembled three-dimensional view of the inner torsion box and the vehicle frame mounting bracket adopted in the embodiment of the present invention;

[0036] Figure 14 is the exploded view of the vehicle frame mounting bracket adopted in the embodiment of the present invention;

[0037] Figure 15 is the assembled top view of the inner torsion box and the vehicle frame mounting bracket adopted in the embodiment of the present invention, wherein the vertical dotted line represents the distribution path of the front and rear support legs, and the horizontal dotted line represents the distribution path of the inner and outer support legs;

[0038] Figure 16 is the three-dimensional view of the inner torsion box adopted in the embodiment of the present invention;

[0039] Explanation of reference numerals:

[0040] 1. Rear section of the engine compartment longitudinal beam; 110. Main board of the rear section of the longitudinal beam; 120. Reinforcement plate of the rear section of the longitudinal beam; 130. Sealing plate of the rear section of the longitudinal beam; 2. Outer torsion box; 3. Inner torsion box; 4. Front section of the engine compartment longitudinal beam; 5. Threshold beam; 6. Front floor longitudinal beam; 11. Front enclosure reinforcement beam; 12. Battery pack mounting bracket; 1210. Connection plate; 1220. Battery pack mounting seat; 1230. Reinforcement flange; 13. Frame mounting bracket; 1310. Mounting plate; 1320. Support plate; 1321. Vertical support portion; 1322. Horizontal support portion; 1330. Mounting sleeve; 1340. Support leg. Detailed implementation manner

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] In the claims, the description and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are all used to distinguish different objects and are not used to describe a specific order.

[0043] In the claims, the description and the above-mentioned accompanying drawings of the present invention, the terms "upper" and "lower" are in the same direction as the up and down directions of the vehicle body, the terms "front" and "rear" are in the same direction as the front and rear directions of the vehicle body, the terms "left" and "right" are in the same direction as the left and right directions of the vehicle body, and the term "inner" refers to the direction towards the XZ reference plane of the vehicle body (the XZ reference plane is the plane passing through the front and rear central axes and the up and down central axes of the vehicle body, that is Figure 1 the plane shown by the dotted line in), the term "outer" refers to the direction away from the XZ reference plane of the vehicle body. For the remaining orientation terms, unless otherwise clearly defined, when using terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0044] In the claims, the description and the above-mentioned accompanying drawings of the present invention, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-removable fixed connection, removable fixed connection, being integrated as one body, and being fixedly connected through other devices or elements.

[0045] In the claims, the description and the above-mentioned drawings of the present invention, when using the terms "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0046] In the claims, the description and the above-mentioned drawings of the present invention, if the term "fitting connection" is used, its implementation manners include but are not limited to fitting welding, connecting through threaded connectors after fitting, etc., and can be selectively set according to actual assembly requirements.

[0047] Please refer to Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 9 , and a torsion box assembly provided by the present invention will now be described. The torsion box assembly includes a rear section 1 of the engine room longitudinal beam, an outer torsion box 2 and an inner torsion box 3 that are sequentially connected from outside to inside. The front end of the rear section 1 of the engine room longitudinal beam is connected to the front section 4 of the engine room longitudinal beam. The outer end of the outer torsion box 2 is connected to the sill beam 5, and the inner end of the inner torsion box 3 is connected to the front floor longitudinal beam 6. The front side wall of the outer torsion box 2 gradually inclines backward from inside to outside, and the front side wall of the inner torsion box 3 gradually inclines backward from outside to inside. The front side wall of the outer torsion box 2, the rear side wall of the outer torsion box 2 and the rear section 1 of the engine room longitudinal beam enclose a first triangular frame (as shown by the small triangle on the left in Figure 9 ), and the front side wall of the inner torsion box 3, the rear side wall of the inner torsion box 3 and the rear section 1 of the engine room longitudinal beam enclose a second triangular frame (as shown by the small triangle on the right in Figure 9 ).

[0048] In this embodiment, two torsion box assemblies are provided in the whole vehicle, and the two torsion box assemblies are symmetrically arranged with respect to the XZ reference plane of the vehicle body in a mirror image manner.

[0049] In this embodiment, there is no unique limitation on whether the rear side wall of the outer torsion box 2 and the rear side wall of the inner torsion box 3 incline with respect to the inside-outside direction, and whether the rear section 1 of the engine room longitudinal beam inclines with respect to the front-rear direction. The first triangular frame and the second triangular frame only need to effectively bear and strengthen the force in the front-rear and inside-outside directions (i.e., the left-right direction), and can effectively decompose and transfer the acting force. For example, the rear side wall of the outer torsion box 2 can gradually incline forward from inside to outside, or gradually incline backward from inside to outside, or be parallel to the inside-outside direction; the rear side wall of the inner torsion box 3 can also adopt a similar setting method, which will not be elaborated here.

[0050] Compared with the prior art, the torque box assembly provided in this embodiment realizes the connection between the engine compartment and the sill beam 5 and the front floor longitudinal beam 6 by connecting the front end of the rear section 1 of the engine compartment longitudinal beam with the front section 4 of the engine compartment longitudinal beam, connecting the outer end of the outer torque box 2 with the sill beam 5, and connecting the inner end of the inner torque box 3 with the front floor longitudinal beam 6, thus meeting the purpose of the joint in the key area. At the same time, since the front side wall of the outer torque box 2 gradually slopes backward from inside to outside and the front side wall of the inner torque box 3 gradually slopes backward from outside to inside, a first triangular frame and a second triangular frame are respectively formed on the inner and outer sides of the rear section 1 of the engine compartment longitudinal beam. The design of the two triangular frames has the following beneficial effects: First, the two triangular frames have force transmission paths in multiple directions including the front-back direction, the inner-outer direction, and the diagonal direction, and can smoothly transmit and decompose the impact forces from the front side, the left side, and the right side of the vehicle; Second, the design of the two triangular frames strengthens the rear section 1 of the engine compartment longitudinal beam, ensuring that the engine compartment longitudinal beam does not flare out or in when transmitting force in the front-back direction, that is, the engine compartment longitudinal beam can collapse smoothly after impact, and the overall structure is not torn, flared out or in; Third, the design of the two triangular frames strengthens the rear section 1 of the engine compartment longitudinal beam, improving its bending strength, and ensuring that the whole engine compartment longitudinal beam is not torn, flared out or in when transmitting force in the inner-outer direction (i.e., during side impact). In addition, the boxed structure formed by the outer torque box 2 and the inner torque box 3 on both sides of the rear section 1 of the engine compartment longitudinal beam can provide a buffer space during the process of the front wheel moving backward and invading the cab during impact. And, since the inner torque box 3 is connected to the front floor longitudinal beam 6, and the front floor longitudinal beam 6 is part of the overall force transmission path, it can quickly transmit the collision force to other beam structures under the floor, which plays a role in decomposing and dissipating the collision force; moreover, on the premise of ensuring the mechanical properties, the overall volume of the torque box assembly is reduced, and the weight of the torque box assembly is lighter, which plays a positive role in lightweight design and promoting energy conservation and emission reduction.

[0051] Generally speaking, the structural design of the torque box assembly in this embodiment makes the torque box assembly itself have higher structural strength, better force transmission path, and sufficient collapse buffer space. Therefore, on the premise of meeting the basic safety performance of the vehicle, the volume of the torque box assembly is smaller than that of the traditional torque box structure, which can release more space for the installation of the power battery pack, thereby increasing the overall storage capacity of the power battery module.

[0052] In some embodiments, the rear side walls of the outer torque box 2 and the inner torque box 3 are both arranged in the inner-outer direction, and in the front-back direction, the two are substantially flush, which makes the front side wall of the outer torque box 2, the rear side wall of the outer torque box 2, the front side wall of the inner torque box 3, and the rear side wall of the inner torque box 3 enclose a third triangular frame (i.e., Figure 9The large triangular frame formed by splicing two small triangular frames, an inner one and an outer one). In this embodiment, on the basis of the aforementioned first triangular frame and second triangular frame, a third triangular frame with a larger area is added. The third triangular frame makes the outer torsion box 2, the inner torsion box 3 and the rear section 1 of the engine room longitudinal beam form an integral large triangular frame, further strengthening the rear section 1 of the engine room longitudinal beam, making the rear part of the first triangular frame and the rear part of the second triangular frame form a relatively coherent force transmission path, enhancing the continuity of force transmission, being beneficial to further decomposing the impact force, providing further guarantee for the stable collapse of the rear longitudinal beam of the engine room, and at the same time avoiding tearing, outward or inward deflection of the engine room longitudinal beam.

[0053] In some embodiments, referring to Figure 5 and Figure 6 , the rear section 1 of the engine room longitudinal beam extends in the front-rear direction and is a box-shaped member, and the lower side wall of the rear section 1 of the engine room longitudinal beam arches downward. This embodiment can produce the following beneficial effects: First, the arrangement of the rear section 1 of the engine room longitudinal beam extending in the front-rear direction can effectively conduct the collision force backward during a frontal collision, making the outer torsion box 2 and the inner torsion box 3 receive relatively uniform forces, and the impact force can be effectively transmitted to the sill beam 5 and the front floor longitudinal beam 6 through the outer torsion box 2 and the inner torsion box 3 respectively; Second, the box-shaped arrangement of the rear section 1 of the engine room longitudinal beam makes the rear section 1 of the engine room longitudinal beam itself have a relatively high structural strength, serving as an effective force transmission channel during a minor collision and being able to produce effective collapse energy absorption during a severe collision, effectively ensuring collision safety; Third, the arrangement of the lower side wall arching downward (as shown in Figure 7 ), and because a downward-arching structure is formed between the front side wall of the inner torsion box 3, the lower side wall of the inner torsion box 3, the front side wall of the outer torsion box 2 and the lower side wall of the outer torsion box 2 (as shown in Figure 8 ), the rear section 1 of the engine room longitudinal beam, the inner torsion box 3 and the outer torsion box 2 cooperate to form a double downward-arching frame, enhancing the load-bearing capacity of the torsion box assembly in the up-down direction. When the vehicle undergoes torsional bending in all directions, the torsion box assembly can play a role in stabilizing torsion resistance, ensuring that the vehicle body has sufficient structural strength when passing through potholes and other bad road conditions, and avoiding problems such as deformation and cracking of the vehicle body, torsional abnormal noise, and distortion and deformation of opening and closing parts such as the door frame that cannot be opened normally.

[0054] When the vehicle undergoes torsional bending in the up-down direction, it provides an effective anti-torsion effect, and when the vehicle passes through a pothole section, it avoids problems such as deformation and cracking of the vehicle body, torsional abnormal noise, and deformation of the door frame.

[0055] More specifically, the rear ends of the rear section 1 of the engine room longitudinal beam, the rear part of the outer torsion box 2 and the rear part of the inner torsion box 3 are substantially flush (as shown in Figure 5 and Figure 6As shown, on the one hand, it can improve the overall structural compactness of the torsion box assembly, and on the other hand, it is also beneficial to improve the continuity of the force transmission path. Among them, "substantially flush" means completely flush, or there is a gap of less than a certain distance (such as 5 mm) between the rear end of the rear section of the cabin longitudinal beam, the rear part of the outer torsion box 2, and the rear part of the inner torsion box 3.

[0056] Of course, in other embodiments, the rear section 1 of the cabin longitudinal beam can also protrude from the rear part of the outer torsion box 2 and the rear part of the inner torsion box 3, and the rear parts of the outer torsion box 2 and the inner torsion box 3 may not be flush with each other in the front-rear direction, and this is not uniquely limited here.

[0057] Based on the above embodiments, refer to Figures 5 to 11 , in order to reduce the material consumption of the rear section 1 of the cabin longitudinal beam, ensure the structural strength and assembly reliability of the rear section 1 of the cabin longitudinal beam, and at the same time make the impact force from the front of the vehicle evenly transmitted to the rear of the vehicle, the rear section 1 of the cabin longitudinal beam is a box-shaped structure with an upward opening. Specifically, a flanging structure that fits and connects with the lower plate surface of the front bulkhead is provided at the edge of the upper opening of the rear section 1 of the cabin longitudinal beam to improve the assembly reliability of the rear section 1 of the cabin longitudinal beam.

[0058] Of course, in some other embodiments, the rear section 1 of the cabin longitudinal beam can also be a box-shaped structure that is circumferentially closed, and is connected to the front bulkhead through the upper side surface of the box-shaped structure. The specific setting method is not described in detail here.

[0059] Based on the fact that the rear section 1 of the cabin longitudinal beam is a box-shaped structure with an upward opening, refer to Figure 10 and Figure 11 , the rear section 1 of the cabin longitudinal beam includes a rear section main board 110, a rear section reinforcing plate 120, and a rear section blocking plate 130; both the rear section main board 110 and the rear section reinforcing plate 120 are U-shaped members with an upward opening. The rear section main board 110 is sleeved on the outer periphery of the rear section reinforcing plate 120, and the rear section blocking plate 130 blocks the rear port of the rear section main board. The rear section main board 110 is used to fit and connect with the front bulkhead. The rear section reinforcing plate 120 strengthens the rear section main board 110 as a whole, and the rear section blocking plate 130 blocks the rear end of the rear section main board 110 to ensure the sealing of the rear part of the cabin longitudinal beam and also improve the structural strength of this area.

[0060] Specifically, the rear end of the rear section reinforcement plate 120 of the longitudinal beam is substantially flush with the rear end of the rear section main plate 110 of the longitudinal beam to maximize the reinforcement area. For the convenience of installation, the rear section plugging plate 130 of the longitudinal beam is a U-shaped member with an opening facing forward. The inner and outer connecting edges of the rear section plugging plate 130 of the longitudinal beam are respectively attached and connected to the side of the rear section reinforcement plate 120 facing away from the rear section main plate 110 of the longitudinal beam. The connection of the rear section plugging plate 130, the rear section reinforcement plate 120, and the rear section main plate 110 in this area can be achieved through a three-layer welding technique. More specifically, a connecting edge is also bent on the lower side of the rear section plugging plate 130 of the longitudinal beam, and the connection method of this connecting edge is similar to that of the inner and outer connecting edges, which will not be elaborated here.

[0061] Refer to Figure 5 、 Figure 6 、 Figures 12 to 16 , in some embodiments, to reduce the material consumption of the outer torsion box 2 and the inner torsion box 3 while ensuring their mechanical properties, both the outer torsion box 2 and the inner torsion box 3 are box-shaped members with an opening facing upward. During specific implementation, flanging structures that are attached and connected to the lower plate surface of the front bulkhead are provided at the front and rear edges of the upper openings of the outer torsion box 2 and the inner torsion box 3 to improve the reliability of the assembly of the outer torsion box 2 and the inner torsion box 3.

[0062] Of course, in some other embodiments, the outer torsion box 2 and the inner torsion box 3 can also be box-shaped structures that are circumferentially closed, and the upper side surface of the box-shaped structure is attached and connected to the front bulkhead. The specific setting method will not be elaborated here.

[0063] In some embodiments, the torsion box assembly further includes a front bulkhead reinforcement beam 11 extending in the inner and outer directions (as shown in Figures 1 to 4 ), and the front bulkhead reinforcement beam 11 is located above the rear section of the engine compartment longitudinal beam 1, the outer torsion box 2, and the inner torsion box 3. The front side of the front bulkhead reinforcement beam 11 is connected to the front section of the engine compartment longitudinal beam 4, and the lower part of the front bulkhead reinforcement beam 11 is connected to the front side wall of the outer torsion box 2. The front bulkhead reinforcement beam 11 in this embodiment is applicable to vehicles with larger sizes, overweight vehicles, or other structural designs that do not meet the requirements. By adding the front bulkhead reinforcement beam 11, the structural strength of the front bulkhead area is ensured. It is defined that the outer torsion box 2, the inner torsion box 3, and the rear section of the engine compartment longitudinal beam 1 form a torsion box structure, and the front bulkhead reinforcement beam 11 is respectively connected to the torsion box structures on the left and right sides of the vehicle body to form an integral torsion frame, enhancing the integrity of the torsion box assembly and improving the anti-torsion performance. At the same time, since the lower part of the front bulkhead reinforcement beam 11 is connected to the front side wall of the outer torsion box 2, the torsion box assembly is not delaminated in the up and down directions, and the impact force or torsional force can be quickly and effectively transmitted between the torsion box structure and the front bulkhead reinforcement beam 11, further increasing the force transmission path and improving the load-bearing capacity.

[0064] In specific implementation, both ends of the front bulkhead reinforcement beam 11 are expansion segments with a width gradually increasing from the inside out. On the one hand, it improves the structural strength of the front bulkhead reinforcement beam 11 itself. On the other hand, it also facilitates the setting of a connecting edge on the lower edge of the expansion segment to fit and connect with the front side wall of the outer torsion box 2.

[0065] Due to the box-shaped setting of the outer torsion box 2, the lower side wall, the front side wall, and the rear side wall of the outer torsion box 2 jointly enclose a box-shaped structure with a downward bow. This structure can not only provide an effective crushing and energy absorption space in the front-rear direction, ensure that the intrusion amount after the front wheel impacts and moves backward meets the requirements, and ensure the survival and escape space for the front-row personnel, but also has relatively high structural strength in the up-down direction. Taking advantage of this feature, in some embodiments, a battery pack mounting bracket 12 is provided at the bottom of the outer torsion box 2. In this embodiment, an installation point for the power battery pack is actually formed at the bottom of the outer torsion box 2. After installation, the power battery pack mainly generates a downward pulling force on the outer torsion box 2. Due to the downward bow design of the outer torsion box 2, it has a strong bearing capacity in the up-down direction, so it can meet the installation requirements of the power battery pack, which further expands the extendable area of the power battery pack.

[0066] On the basis of the above embodiments, in order to further expand the downward bow trend of the outer torsion box 2, refer to Figure 2 and Figure 6 , the lower side wall of the outer torsion box 2 has a front wall and a rear wall that are sequentially connected from front to back; the front wall gradually slopes upward from back to front and is connected to the front side wall of the outer torsion box 2; the rear wall can be perpendicular to the up-down direction or be set at a certain inclination angle with respect to the up-down direction, and the rear wall is connected to the rear side wall of the outer torsion box 2; the battery pack mounting bracket 12 is arranged on the rear wall.

[0067] It should be noted that the downward bow design of the outer torsion box 2 in the above embodiments is applicable to the case where the upper part of the outer torsion box 2 is open, and is also applicable to the case where the upper part of the outer torsion box 2 is closed, and is not uniquely limited here.

[0068] In some embodiments, the outer torsion box 2 can be manufactured by an integral molding process or by a process of block molding and then welding, with the aim of finally forming a box-shaped structure, which is not uniquely limited here. In this embodiment, the manufacturing method of block molding and then welding is exemplarily adopted.

[0069] In some embodiments, the above battery pack mounting bracket 12 can adopt the structure as shown in Figure 6 and Figure 12 . See Figure 2, the battery pack mounting bracket 12 includes a connecting plate 1210 and a battery pack mounting seat 1220; the connecting plate 1210 is attached to the upper side of the bottom plate of the outer torsion box 2, the battery pack mounting seat 1220 has a mounting hole (such as a screw hole), and through holes corresponding to the mounting hole are provided on both the outer torsion box 2 and the connecting plate 1210. The front end of the power battery pack sequentially passes through the front end of the power battery pack, the through hole on the outer torsion box 2, and the through hole on the connecting plate 1210 from bottom to top through a fastener (such as a threaded fastener), and is matched with the mounting hole, finally realizing the fixation of the power battery pack and the outer torsion box 2. More specifically, the edge of the connecting plate 1210 is turned up to form a reinforcing flange 1230.

[0070] Refer to Figures 13 to 16 , in some embodiments, a vehicle frame mounting bracket 13 is provided at the bottom of the inner cavity of the inner torsion box 3. The vehicle frame mounting bracket 13 includes a mounting plate 1310, a support plate 1320, and a mounting sleeve 1330; at least three support legs are provided on the outer periphery of the mounting plate 1310, and the support legs are supported and connected to the inner torsion box 3 so as to form a spaced space between the mounting plate 1310 and the inner torsion box 3; the mounting sleeve 1330 is disposed through the mounting plate 1310 and the inner torsion box 3; the support plate 1320 is disposed in the spaced space and is supported and connected between the mounting sleeve 1330 and the inner torsion box 3. In this embodiment, due to the box-shaped setting of the inner torsion box 3, the lower side wall, the front side wall, and the rear side wall of the inner torsion box 3 jointly enclose a box-shaped structure with a downward bow. This structure can not only provide an effective collapse energy absorption space in the front-rear direction, but also has high structural strength in the up-down direction. Utilizing this feature, a high-strength mounting base can be provided for the vehicle frame mounting bracket 13. The vehicle frame mounting bracket 13 of this embodiment forms a "cage frame" with relatively high structural strength through the cooperation of the mounting plate 1310, the support legs, the support plate 1320, and the mounting sleeve 1330, further improving the structural strength of the vehicle frame mounting position and ensuring the reliability of the installation.

[0071] In some embodiments, the inner torsion box 3 can be manufactured by an integral forming process or a process of forming in blocks and then welding, aiming at finally forming a box-shaped structure, and there is no unique limitation here. This embodiment exemplarily adopts the manufacturing method of forming in blocks and then welding.

[0072] In some embodiments, the support heights of two adjacent support legs are different, that is, a height difference in the Z direction is formed between two adjacent support legs, ensuring uniform and stable force under different vehicle postures and avoiding deformation and cracking in the vehicle frame installation area. Among them, the "support height" refers to the height of the connection end where the support leg is connected to the inner torsion box 3.

[0073] Specifically, taking the example of three support legs, the three support legs are radially distributed on the periphery of the mounting plate 1310, two of which are located at the front of the mounting plate 1310 and extend forward at an angle, and the other support leg is located at the rear of the mounting plate 1310 and extends backward; the three support legs have different support heights.

[0074] In some specific embodiments, see Figures 11 to 15 There are at least four supporting legs, two of which are arranged opposite to each other in the front-to-back direction, and the other two supporting legs are arranged opposite to each other in the inside-outside direction; there are multiple mounting sleeves 1330, at least one of which is located on the distribution path of the front and rear supporting legs, and at least one of which is located on the distribution path of the inside and outside supporting legs. Figure 15 As shown by the vertical dotted line in the figure, the distribution paths of the inner and outer supporting legs are as follows: Figure 15 In this embodiment, the front and rear two supporting legs and the inner and outer two supporting legs form a cross supporting structure, which can withstand impact forces in multiple directions and further improve the uniformity of force; at the same time, since the installation sleeve 1330 is located on the distribution path of the supporting legs, the structural strength of the area where the installation sleeve 1330 is located is improved.

[0075] It should be noted that, when the number of supporting legs is more than four, only four of them need to meet the above-mentioned front-to-back and inside-outside arrangement requirements, and the remaining supporting legs can meet the above-mentioned basic arrangement requirements. The number of supporting legs is not limited here. This embodiment shows an embodiment in which four supporting legs are arranged, two of which are arranged in the front-to-back direction, and the other two are arranged in the left-to-right direction, which meets the requirements of structural strength and simplifies the structure; based on this, the supporting heights of the front and rear supporting legs are relatively high, and are respectively connected to the front and rear side walls of the inner torsion box 3, and the supporting heights of the inner and outer supporting legs are relatively low, and are respectively connected to the lower side walls of the inner torsion box 3.

[0076] In some embodiments, see Figure 14 The support plate 1320 includes a vertical support portion 1321 and a horizontal support portion 1322 connected to each other, so that the support plate 1320 is L-shaped; wherein the vertical support portion 1321 is closely connected to the outer peripheral surface of the mounting sleeve 1330, the horizontal support portion 1322 is closely connected to the lower side wall of the inner torque box 3, and the horizontal support portion 1322 is also partially closely connected to at least one support leg. The support plate 1320 of this embodiment has a simple structure and high strength, which can further enhance the structural strength of the "cage frame" and reduce the amount of materials used.

[0077] The torsion box assembly of the present application systematically solves the structural design problem of the front torsion box of new energy vehicle models. The structure is more compact, which can save space for the power battery and improve the cruising range of the whole vehicle. At the same time, it is lighter in weight, which is more in line with the design concept of lightweight, energy conservation and emission reduction. In addition, the force transmission path of the torsion box assembly is smoother and more unobstructed, and it has good torsional strength, which can meet the structural strength requirements of the whole vehicle.

[0078] Based on the same inventive concept, an embodiment of the present application further provides a vehicle, including the above-mentioned torsion box assembly.

[0079] Compared with the prior art, the vehicle provided in this embodiment can effectively reduce the space occupied by the torsion box assembly by adopting the above-mentioned torsion box assembly, release more installation space for the power battery pack, improve the overall power storage capacity of the battery module, and ultimately improve the cruising range of the whole vehicle and enhance the market competitiveness.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A torsion box assembly, characterized in that, It includes the rear section of the engine room longitudinal beam (1), the outer torque box (2) and the inner torque box (3) that are connected in sequence from outside to inside. The front end of the rear section of the engine room longitudinal beam (1) is connected to the front section of the engine room longitudinal beam (4). The outer end of the outer torque box (2) is connected to the sill beam (5). The inner end of the inner torque box (3) is connected to the front floor longitudinal beam (6). The front side wall of the outer torque box (2) gradually inclines backward from inside to outside. The front side wall of the inner torque box (3) gradually inclines backward from outside to inside. The front side wall of the outer torque box (2), the rear side wall of the outer torque box (2) and the rear section of the engine room longitudinal beam (1) enclose a first triangular frame. The front side wall of the inner torque box (3), the rear side wall of the inner torque box (3) and the rear section of the engine room longitudinal beam (1) enclose a second triangular frame.

2. The torsion box assembly according to claim 1, wherein, The front side wall of the outer torque box (2), the rear side wall of the outer torque box (2), the front side wall of the inner torque box (3) and the rear side wall of the inner torque box (3) enclose a third triangular frame.

3. The torsion box assembly according to claim 1, wherein, The rear section of the engine room longitudinal beam (1) extends in the front-rear direction and is a box-shaped member. The lower side wall of the rear section of the engine room longitudinal beam (1) arches downward.

4. The torsion box assembly according to claim 3, characterized in that, The rear section of the engine room longitudinal beam (1) is a box-shaped structure with an upward opening.

5. The torsion box assembly according to any one of claims 1-4, characterized in that, The torque box assembly further includes a front enclosure reinforcing beam (11) that extends in the inside-outside direction and is located above the rear section of the engine room longitudinal beam (1), the outer torque box (2) and the inner torque box (3). The front side of the front enclosure reinforcing beam (11) is connected to the front section of the engine room longitudinal beam (4). The lower part of the front enclosure reinforcing beam (11) is connected to the front side wall of the outer torque box (2).

6. The torsion box assembly according to any one of claims 1-4, characterized in that, A battery pack mounting bracket (12) is provided at the bottom of the outer torque box (2).

7. The torsion box assembly according to any one of claims 1-4, characterized in that, A vehicle frame mounting bracket (13) is provided at the bottom of the inner cavity of the inner torque box (3). The vehicle frame mounting bracket (13) includes a mounting plate (1310), a support plate (1320) and a mounting sleeve (1330). At least three support legs are provided on the outer periphery of the mounting plate (1310). The support legs are supported and connected to the inner torque box (3) so as to form a spaced space between the mounting plate (1310) and the inner torque box (3). The mounting sleeve (1330) penetrates through the mounting plate (1310) and the inner torque box (3). The support plate (1320) is disposed in the spaced space and is supported and connected between the mounting sleeve (1330) and the inner torque box (3).

8. The torsion box assembly according to claim 7, wherein, The support heights of two adjacent support legs are different.

9. The torsion box assembly according to claim 7, wherein, At least four support legs are provided. Two of the support legs are arranged oppositely in the front-rear direction, and the other two support legs are arranged oppositely in the inside-outside direction. A plurality of mounting sleeves (1330) are provided. Among them, at least one mounting sleeve (1330) is located on the distribution path of the front and rear support legs, and at least one other mounting sleeve (1330) is located on the distribution path of the inside and outside support legs.

10. A vehicle, characterized in that, It includes the torque box assembly according to any one of claims 1-9.

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