Force transmission structure of vehicle body and vehicle

Abstract

The utility model provides a force transmission structure of a vehicle body and a vehicle, a battery pack frame is integrated in the vehicle body, and doorsill beams on the left side and the right side of the vehicle body form side frames on the left side and the right side of the battery pack frame; the force transmission structure comprises a battery pack cross beam connected between the doorsill beams on the two sides, and the battery pack cross beam comprises a front cross beam arranged close to the front ends of the doorsill beams on the two sides, a rear cross beam arranged close to the rear ends of the doorsill beams on the two sides and a reinforcing cross beam located between the front cross beam and the rear cross beam. A battery pack inner cavity is defined among the front cross beam, the rear cross beam and the threshold beams on the two sides, the reinforcing cross beams are located in the battery pack inner cavity, and the reinforcing cross beams are arranged in the front-back direction of the whole vehicle at intervals. The lateral rigidity and the lateral force transmission channel of the vehicle body can be increased, and the lateral collision safety of the whole vehicle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle bodies, and in particular to a force transmission structure of a vehicle body. The utility model also relates to a vehicle provided with the force transmission structure in the vehicle body. Background Art

[0002] As consumers pay more and more attention to vehicle collision safety, how to improve the safety of vehicles in collisions has become the focus of research and development work of various automobile companies. In vehicle collisions, taking the side collision that mainly hits the side of the vehicle as an example, of course, the body structure, when a collision occurs, mainly bears the impact of the collision through the side sill beam, and transmits and disperses the collision force. Some models will also be equipped with several front floor beams to assist in lateral support and dispersion of collision force. However, the existing method of responding to side collisions through sill beams and front floor beams still has a weak response capability, resulting in a large amount of side collision intrusion, which is not conducive to improving the safety of the entire vehicle side collision. Utility Model Content

[0003] In view of this, the utility model aims to provide a force transmission structure of a vehicle body, so as to help improve the side collision safety of the entire vehicle.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A force transmission structure of a vehicle body, wherein a battery pack frame is integrated in the vehicle body, and the sill beams on the left and right sides of the vehicle body constitute the side frames on the left and right sides of the battery pack frame;

[0006] The force transmission structure includes a battery pack cross beam connected between the threshold beams on both sides, the battery pack cross beam includes a front cross beam arranged near the front end of the threshold beams on both sides, a rear cross beam arranged near the rear end of the threshold beams on both sides, and a reinforcing cross beam located between the front cross beam and the rear cross beam;

[0007] A battery pack cavity is defined between the front cross beam, the rear cross beam and the door sill beams on both sides. The reinforcing cross beam is located in the battery pack cavity, and the reinforcing cross beams are multiple and spaced apart along the front-rear direction of the vehicle.

[0008] Furthermore, the force transmission structure also includes a rear floor front cross beam located at the rear side of the battery pack frame, the rear floor front cross beam is connected between the door sill beams on both sides, and a rear floor front cross beam cavity is formed in the rear floor front cross beam.

[0009] Furthermore, the force transmission structure also includes a front enclosure lower cross beam located at the front side of the battery pack frame;

[0010] The front enclosure lower cross beam is connected between the rear sections of the front cabin longitudinal beams on the left and right sides, and the rear section of the front cabin longitudinal beam on each side is connected to the door sill beam on the same side through a torsion box;

[0011] A front dash lower cross beam cavity is formed between the front dash lower cross beam and the front dash lower plate.

[0012] Further, the battery pack frame includes a battery pack upper cover that closes the top of the battery pack inner cavity, and the battery pack upper cover constitutes a front floor panel in the vehicle body;

[0013] The force transmission structure also includes a seat crossbeam located above the battery pack upper cover, and the seat crossbeam is connected between the threshold beams on both sides.

[0014] Further, the seat crossbeam is roll-formed; and / or,

[0015] The cross section of the seat cross beam is in an "M" shape, and a plurality of seat cross beam cavities arranged side by side are formed between the seat cross beam and the battery pack upper cover.

[0016] Furthermore, the seat cross beams are multiple and spaced apart along the front-rear direction of the vehicle;

[0017] Viewed from the upper and lower directions of the vehicle, one of the seat cross beams and one of the reinforcing cross beams are arranged in correspondence with each other up and down, and are located between the B-pillars on the left and right sides of the vehicle body.

[0018] Furthermore, the door sill beam and the battery pack cross beam are both made of extruded aluminum, and a plurality of cavities are formed in the door sill beam and the battery pack cross beam.

[0019] Further, from the front-rear direction of the vehicle, the sill beams on both sides have a first portion, a second portion and a third portion which are sequentially connected from the outside to the inside along the left-right direction of the vehicle;

[0020] The cavity is formed in the first part, the second part and the third part, and the second part is arranged in a bent shape in the left-right direction of the vehicle;

[0021] Each of the battery pack cross beams is connected between the third parts on both sides.

[0022] Further, the first part has a first transverse rib arranged along the left-right direction of the vehicle, the third part has a second transverse rib arranged along the left-right direction of the vehicle, and the thickness of the first transverse rib is less than the thickness of the second transverse rib; and / or,

[0023] The second part includes a connecting rib connected between the first part and the third part, the connecting rib is bent and includes an outer rib and an inner rib connected together, the outer rib is connected to the first part, and the inner rib is connected to the third part.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] The force transmission structure of the vehicle body described in the utility model integrates the battery pack frame with the vehicle body, so that the door sill beam constitutes the side frame of the battery pack frame, and a battery pack cross beam composed of a front cross beam, a rear cross beam and a plurality of reinforcing cross beams is arranged between the door sill beams on both sides. In this way, the plurality of battery pack cross beams in the battery pack frame can be utilized to increase the lateral stiffness and lateral force transmission channel of the vehicle body, which can improve the ability to cope with side collisions and help to improve the safety of the entire vehicle in side collisions.

[0026] In addition, the force transmission structure includes a rear floor front cross beam, which can increase the lateral rigidity and lateral force transmission channel of the vehicle body, and form a rear floor front cross beam cavity in the rear floor front cross beam, and can also use the high strength of the cavity structure to ensure the structural strength of the rear floor front cross beam, and can improve its lateral support rigidity and force transmission capacity. The force transmission structure further includes a front wall lower cross beam, which can also increase the lateral rigidity and lateral force transmission channel of the vehicle body, and form a front wall lower cross beam cavity between the front wall lower cross beam and the front wall lower plate, and can also use the high strength of the cavity structure to ensure the structural strength of the front wall lower cross beam position, and can improve its lateral support rigidity and force transmission capacity.

[0027] Secondly, the battery pack cover constitutes the front floor panel in the vehicle body, which can realize the multi-purpose of the battery pack cover and help reduce the weight and cost of the vehicle body. The force transmission structure includes a seat beam, which can further increase the lateral stiffness and lateral force transmission channel of the vehicle body, and help to better improve the side collision safety. The seat beam is roll-formed, which can facilitate the preparation of the seat beam, make the seat beam adopt an "M"-shaped cross-section, and form a seat beam cavity between the seat beam and the battery pack cover, which is conducive to further improving the structural reinforcement effect of the seat beam.

[0028] Furthermore, by arranging the seat crossbeam and the corresponding reinforcement crossbeam between the B-pillars on both sides, the rear seat crossbeam and the reinforcement crossbeam can form a ring structure in the overall body, which can increase the overall rigidity of the middle part of the body and is also conducive to the transmission and dispersion of collision force. The door sill beam and the battery pack crossbeam are both made of extruded aluminum, which can facilitate the preparation of each beam body and reduce the preparation cost. At the same time, it can also ensure the structural strength of each beam body and improve its application effect.

[0029] In addition, the threshold beam includes a first part, a second part, and a third part which are arranged in sequence from the outside to the inside, and the second part is arranged in a bent shape, so that the threshold beam can be better crushed and energy-absorbing when the vehicle is hit from the side, which can improve the collision energy-absorbing effect of the threshold beam and provide better protection for the battery pack in the event of a collision. Transverse ribs are arranged in the first part and the third part, and the thickness of the transverse ribs in the first part is smaller than the thickness of the transverse ribs in the third part, which is conducive to achieving the difference in transverse stiffness between the first part and the third part, and can also make the threshold beam better crushed and energy-absorbing, which can improve the collision energy-absorbing effect of the threshold beam. The second part is composed of a bent connecting rib, which can make the second part simple in structure and easy to design and shape, and can also make the second part have better energy-absorbing capacity based on the bending design.

[0030] Another object of the present invention is to provide a vehicle, wherein the vehicle is provided with the force transmission structure of the vehicle body as described above.

[0031] The vehicle described in the utility model has the same beneficial effects as the force transmission structure of the above-mentioned vehicle body, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0033] Figure 1 A schematic diagram of a force transmission structure of a vehicle body according to an embodiment of the utility model;

[0034] Figure 2 for Figure 1 A schematic diagram of the structure shown from a bottom perspective;

[0035] Figure 3 for Figure 1 Cross-section at the AA position;

[0036] Figure 4 This is a schematic diagram of the structure of the seat crossbeam according to an embodiment of the utility model;

[0037] Figure 5 for Figure 4 Cross-section at the mid-BB position;

[0038] Figure 6 This is a schematic diagram of the structure of the battery pack frame according to an embodiment of the present utility model;

[0039] Figure 7 A schematic diagram of the structure of a battery pack frame according to an embodiment of the present utility model;

[0040] Figure 8This is a schematic diagram of the arrangement of the reinforcing crossbeam according to an embodiment of the utility model;

[0041] Fig. 9 This is a schematic diagram of the structure of the threshold beam according to an embodiment of the utility model;

[0042] Fig.10 for Fig. 9 Cross-section at the mid-CC position;

[0043] Fig.11 for Fig.10 A partial schematic diagram of the second part;

[0044] Fig.12 A schematic diagram of a gradual setting of the bending angle of the connecting rib according to an embodiment of the utility model;

[0045] Description of reference numerals:

[0046] 1. Door sill beam; 2. Battery pack frame; 3. Seat crossbeam; 4. B-pillar; 5. Front cabin longitudinal beam; 6. Lower panel of the front wall; 7. Front crossbeam of the rear floor; 8. Lower crossbeam of the front wall; 9. Torque box;

[0047] 101, first part; 1011, first transverse rib; 1011a, rib segment; 1012, vertical rib; 102, second part; 1021, connecting rib; 1021a, outer rib; 1021b, inner rib; 103, third part; 1031, second transverse rib; 201, front crossbeam; 202, rear crossbeam; 203, upper cover of battery pack; 204, lower cover of battery pack; 205, reinforcing crossbeam; 206, reinforcing longitudinal beam; 301, front seat crossbeam; 302, rear seat crossbeam; 303, connecting plate; 5a, rear section of front cabin longitudinal beam;

[0048] K, crumple space; Q, battery pack cavity; M, seat crossbeam cavity; N, rear floor front crossbeam cavity; S, front surround lower crossbeam cavity. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0050] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are 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, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0052] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0053] Embodiment 1

[0054] This embodiment relates to a vehicle body force transmission structure, combined with Figure 1 and Figure 2 As shown, a battery pack frame 2 is integrated into the vehicle body of the present embodiment, and the sill beams 1 on the left and right sides of the vehicle body constitute the side frames on the left and right sides of the battery pack frame 2 .

[0055] In addition, the force transmission structure of this embodiment includes a battery pack cross beam connected between the two side sill beams 1, and the battery pack cross beam includes a front cross beam 201 arranged near the front end of the two side sill beams 1, a rear cross beam 202 arranged near the rear end of the two side sill beams 1, and a reinforcing cross beam 205 located between the front cross beam 201 and the rear cross beam 202. Among them, the front cross beam 201, the rear cross beam 202 and the two side sill beams 1 define a battery pack cavity Q, and the reinforcing cross beam 205 is located in the battery pack cavity Q, and the reinforcing cross beam 205 is also a plurality of cross beams arranged at intervals along the front and rear direction of the vehicle.

[0056] At this time, as set above, by integrating the battery pack frame 2 with the vehicle body, the door sill beam 1 constitutes the side frame of the battery pack frame, and a battery pack cross beam composed of a front cross beam 201, a rear cross beam 202 and a plurality of reinforcing cross beams 205 is arranged between the door sill beams 1 on both sides. This embodiment can utilize the multiple battery pack cross beams in the battery pack frame 2 to increase the lateral stiffness and lateral force transmission channel of the vehicle body, which can improve the ability to cope with side collisions, so as to achieve the effect of improving the side collision safety of the entire vehicle.

[0057] Based on the above overall introduction, specifically, Figure 1 , Figure 2 , and continue to combine Figure 3As shown, as a preferred implementation form, the force transmission structure of this embodiment also includes a rear floor front cross beam 7 located at the rear side of the battery pack frame 2. The rear floor front cross beam 7 is located at the front end of the rear floor assembly in the vehicle body, and the rear floor front cross beam 7 is also connected between the door sill beams 1 on both sides. At the same time, a rear floor front cross beam cavity N is also formed in the rear floor front cross beam 7.

[0058] At this point, it can be understood that by making the force transmission structure include the rear floor front cross beam 7, the lateral rigidity and lateral force transmission channel of the vehicle body can be increased, and the rear floor front cross beam cavity N is formed in the rear floor front cross beam 7, and the structural strength of the rear floor front cross beam 7 can be ensured by utilizing the high strength of the cavity structure, thereby improving its lateral support rigidity and force transmission capacity. In specific implementation, the above-mentioned rear floor front cross beam 7 can be set with reference to the relevant structure in the existing vehicle body, and it can generally adopt a stamping sheet metal welding structure, and can be connected to the threshold beam 1 by, for example, FDS (Flow Drill Screw, rotary tapping riveting).

[0059] As a preferred implementation form, Figures 1 to 3 As shown, the force transmission structure of this embodiment also includes a front wall lower cross beam 8 located on the front side of the battery pack frame 2. The front wall lower cross beam 8 is located at the bottom of the front wall assembly in the vehicle body, and the front wall lower cross beam 8 is connected between the rear sections 5a of the front cabin longitudinal beams on the left and right sides. The rear sections 5a of the front cabin longitudinal beams on each side are also connected to the same side sill beam 1 through the torsion box 9. At the same time, a front wall lower cross beam cavity S is also formed between the front wall lower cross beam 8 and the front wall lower plate 6.

[0060] It can be understood that, similar to the setting of the front floor rear cross beam 7 mentioned above, by making the force transmission structure further include a front dash lower cross beam 8, it is also possible to increase the lateral stiffness and lateral force transmission channel of the vehicle body, and by forming a front dash lower cross beam cavity S between the front dash lower cross beam 8 and the front dash lower plate 6, the high strength of the cavity structure can also be utilized to ensure the structural strength of the front dash lower cross beam 8, so as to enhance its lateral support stiffness and force transmission capacity.

[0061] In specific implementation, the above-mentioned front enclosure lower cross beam 8 is generally also a stamped sheet metal part, and the arrangement of the front enclosure lower cross beam 8 in the vehicle body, the connection between it and the front cabin longitudinal beam rear section 5a at the rear end of the front cabin longitudinal beam 5, as well as the connection between the front cabin longitudinal beam rear section 5a on each side, the torque box 9 and the door sill beam 1, etc., all refer to the relevant structures in the existing vehicle body, or adopt a conventional connection arrangement method.

[0062] In this embodiment, the battery pack cavity Q is used to accommodate battery components such as battery cells. Figure 6 and Figure 7As shown in , the battery pack frame 2 of this embodiment further includes a battery pack upper cover 203 that closes the top of the battery pack inner cavity Q, and a battery pack lower cover 204 that closes the bottom of the battery pack inner cavity Q. In specific implementation, the battery pack upper cover 203 and the battery pack lower cover 204 can be made of steel plates or aluminum alloy plates, and both can be connected to the sill beams 1 on both sides, and the front cross beam 201 and the rear cross beam 202 through screw or riveting structures.

[0063] In addition, based on the above-mentioned arrangement of the battery pack upper cover 203, as a preferred implementation form, in the overall vehicle body, for example, the battery pack upper cover 203 can constitute the front floor panel of the vehicle body. In this way, the battery pack upper cover 203 constitutes the front floor panel of the vehicle body, and the battery pack upper cover 203 can be used for multiple purposes, which helps to reduce the weight and cost of the vehicle body.

[0064] In this embodiment, as a preferred implementation form, the force transmission structure further includes a seat crossbeam 3 located above the battery pack upper cover 203, and the seat crossbeam 3 is also connected between the two side sill beams 1. By making the force transmission structure include the seat crossbeam 3, it is obvious that it can further increase the lateral rigidity and lateral force transmission channel of the vehicle body, which helps to better improve the side collision safety.

[0065] When implementing it, Figure 1 As shown, the seat cross beams 3 may preferably be arranged as a plurality of seat cross beams 3 spaced apart in the front-rear direction of the vehicle, and as an example, the seat cross beams 3 may be, for example, two seat cross beams 3 spaced apart in the front-rear direction of the vehicle, and for ease of description, the two seat cross beams 3 may be, for example, respectively referred to as a front seat cross beam 301 and a rear seat cross beam 302.

[0066] In addition, this embodiment is preferably combined with Figure 4 and Figure 5 As shown, the above-mentioned seat cross beams 3 can be roll-formed, for example, and taking the seat cross beam 302 as an example, the cross section of the seat cross beam 3 can also be set to be "M"-shaped, and the two ends of the seat cross beam 3 can be connected to the side sill beams 1 through the connecting plates 303 made of stamped sheet metal. At this time, the seat cross beam 3 is roll-formed and adopts an "M"-shaped cross section, which not only facilitates the preparation of the seat cross beam 3 and ensures the structural strength of the seat cross beam 3, but also, it can be understood that when the seat cross beam 3 is buckled on the battery pack cover 203, it can form a transversely penetrating seat cross beam cavity M between the seat cross beam 3 and the battery pack cover 203, which is conducive to further improving the structural reinforcement effect of the seat cross beam 3.

[0067] On the basis of multiple seat cross beams 3 arranged at intervals, as a preferred implementation form in this embodiment, from the vertical direction of the whole vehicle, one of the seat cross beams 3 and one of the reinforcing cross beams 205 can also be arranged in correspondence with each other, and located between the B-pillars 4 on the left and right sides of the vehicle body. In this way, the seat cross beam 3 and the corresponding reinforcing cross beam 205 are arranged between the B-pillars 4 on both sides, so that the seat cross beam 3 and the reinforcing cross beam 205 can form a ring structure (the top is connected by the top cover cross beam) in the whole vehicle body, which can increase the overall rigidity of the middle part of the vehicle body and is also conducive to the transmission and dispersion of the collision force.

[0068] In specific implementation, this embodiment can, for example, allow the rear seat cross beam 302 and one of the reinforcing cross beams 205 in the battery pack 2 to be arranged in correspondence with each other up and down, and allow the two to be arranged between the B pillars 4 on both sides. In addition, in addition to the upper and lower corresponding arrangement, of course, it is preferred that this embodiment can also allow the two to be connected together through a connector. The above-mentioned connector can be, for example, a bolt, and for connection, a connecting hole can be provided on the battery pack cover 203, and a threaded sleeve can be provided on the reinforcing cross beam 205 corresponding to the rear seat cross beam 302. The bolt passes through the rear seat cross beam 302 and the battery pack cover 203, and is screwed into the threaded sleeve on the reinforcing cross beam 205.

[0069] It should be noted that, in addition to making the rear seat crossbeam 302 correspond to one of the reinforcing crossbeams 205 in the battery pack 2 up and down and connected together, of course, a reinforcing crossbeam 205 corresponding to the front seat crossbeam 301 up and down can also be set in the battery pack inner cavity Q, and the reinforcing crossbeam 205 can also be connected to the front seat crossbeam 301 in the same way. This is also possible and the present embodiment does not impose any restrictions on it.

[0070] In this embodiment, as a preferred implementation form, the threshold beam 1 and each battery pack cross beam can be made of extruded aluminum, and based on the use of extruded aluminum, multiple cavities can be formed in the threshold beam 1 and the battery pack cross beam. At this time, by making the threshold beam 1 and each battery pack cross beam both made of extruded aluminum, it is easy to prepare each beam body, which can reduce the preparation cost, and can also ensure the structural strength of each beam body, thereby improving its application effect.

[0071] like Figure 8 As shown, it is worth noting that, in addition to the reinforcing cross beam 205, a reinforcing longitudinal beam 206 cross-connected with the reinforcing cross beam 205 can also be generally provided in the battery pack inner cavity Q to better improve the structural strength and longitudinal rigidity of the battery pack frame 2. In addition, in a specific implementation, the above beams made of extruded aluminum can be connected by MIG (MeltInert-gas Welding) welding.

[0072] In this embodiment, as a preferred implementation form, continue as follows Fig. 9 and Fig.10 As shown in , from the front and rear direction of the vehicle, the sill beams 1 on both sides have a first part 101, a second part 102 and a third part 103 which are sequentially connected from the outside to the inside along the left and right direction of the vehicle. A cavity is formed in the first part 101, the second part 102 and the third part 103, and the second part 102 is bent in the left and right direction of the vehicle, and each battery pack beam is connected between the third parts 103 on both sides.

[0073] It is worth noting that, based on the first part 101, the second part 102 and the third part 103, the shape of the first part 101 can still be designed by referring to the cross-sectional shape of the traditional door sill beam structure in existing vehicles. For example, the top of the cross section of the first part 101 can be set to have two oppositely arranged inclined surfaces, and the bottom side close to the outside of the vehicle can be set to an inclined surface. The shape of the third part 103 can be designed by referring to the existing battery pack side frame structure that also uses extruded aluminum, and the second part 102 can be set to the required bending shape.

[0074] In addition, as a feasible implementation form, Fig.10 As shown, this embodiment has a first transverse rib 1011 arranged along the left-right direction of the vehicle in the first part 101, and also has a second transverse rib 1031 arranged along the left-right direction of the vehicle in the third part 103, and the thickness of the first transverse rib 1011 is less than the thickness of the second transverse rib 1031.

[0075] In this way, by respectively arranging transverse ribs in the first part 101 and the third part 103, and making the thickness of the first transverse rib 1011 in the first part 101 smaller than the thickness of the third transverse rib 1031 in the third part 103, this embodiment can make the transverse stiffness (that is, the stiffness in the left and right directions of the whole vehicle) between the first part 101 and the third part 103 different. Therefore, similar to the arrangement of the above-mentioned bent second part 102, it can also increase the crushing energy absorption effect of the sill beam 1 when the vehicle collides sideways. At the same time, it can also utilize the greater stiffness of the third part 103 to better protect the internal structure of the battery pack.

[0076] In this embodiment, as a preferred implementation form, still combined with Fig.10As shown, the first part 101 also has a vertical rib 1012 arranged along the vertical direction of the vehicle, and the vertical rib 1012 is also specifically a plurality of ribs arranged at intervals along the left-right direction of the vehicle. Each vertical rib 1021 is cross-connected with the first transverse rib 1011, and divides the first transverse rib 1011 into a plurality of rib segments 1011a arranged in sequence along the left-right direction of the vehicle. From the outside to the inside along the left-right direction of the vehicle, the thickness of each rib segment 1011a in the first transverse rib 1011 decreases one by one.

[0077] At this time, by setting a plurality of vertical ribs 1012 in the first part 101, and making the vertical ribs 102 separate the first transverse ribs 1011 into rib segments 1011a with gradually varying thicknesses, it can be understood that it is possible to achieve multi-stage energy absorption of the first part 101 based on the different thicknesses of the rib segments 1011a, which is beneficial for the first part 101 to collapse and deform from the outside to the inside in sequence when the vehicle has a side collision, thereby buffering the collision force and improving the energy absorption effect.

[0078] It is worth noting that, see Fig.10 As shown, in a specific implementation, the first transverse ribs 1011 in the first part 101 can preferably be arranged in a plurality of intervals along the vertical direction of the vehicle, and each first transverse rib 1011 is divided into a plurality of rib segments 1011a with gradually varying thicknesses by a plurality of vertical ribs 1012. At the same time, the vertical ribs 1012 can be arranged in two intervals, for example, so that the first part 101 as a whole can be divided into a primary energy absorption zone, a secondary energy absorption zone, and a tertiary energy absorption zone arranged in sequence. The lateral stiffness of the above three energy absorption zones gradually increases, so that the collision force absorption capacity can be gradually increased, thereby ensuring the crushing energy absorption capacity of the first part 101.

[0079] In this embodiment, Fig.10 And continue to combine Fig.11 As shown in , as a preferred implementation form, the second part 102 specifically includes a connecting rib 2011 connected between the first part 101 and the third part 103. The thickness of the connecting rib 2011 constituting the second part 102 is greater than the thickness of the first transverse rib 1011, and is not greater than the thickness of the second transverse rib 1031. At the same time, the connecting rib 2011 is also bent and includes an outer rib 1021a and an inner rib 1021b connected together.

[0080] The outer ribs 1021a are connected to the first part 101, and the inner ribs 1021b are connected to the third part 103. It can be understood that the second part 102 is composed of the bent connecting ribs 1021, and the thickness of the connecting ribs 1021 is greater than the first transverse ribs 1011 in the first part 101, and not greater than the second transverse ribs 1031 in the third part 103. On the one hand, the second part 102 can be made simple in structure and easy to design and shape, and on the other hand, the second part 102 can have a better energy absorption capacity based on the bent design.

[0081] Based on the fact that the connecting ribs 1021 in the second part 102 are composed of the outer ribs 1021a and the inner ribs 1021b, in this embodiment, the thickness of the outer ribs 1021a is further made smaller than the thickness of the inner ribs 1021b, and the connecting ribs 1021 are arranged in a plurality of intervals along the vertical direction of the vehicle. At this time, by making the thickness of the outer ribs 1021a smaller than the inner ribs 1021b, it is obvious that the collapse energy absorption performance of the second part 102 can be further improved, and by setting the connecting ribs in a plurality of intervals, it can ensure the connection effect of the second part 102 between the first part 101 and the third part 103 on both sides, which is conducive to ensuring the stability of the overall structure of the sill beam 1.

[0082] In this embodiment, Fig.10 and Fig.11 As shown, in each connecting rib 2011 in the second part 102, as a preferred implementation form, the outer rib 1021a can be arranged in the left-right direction of the vehicle, and the inner rib 1021b can be arranged in an inclined direction toward the third part 103. In this way, the outer rib 1021a in the connecting rib 1021 is arranged in the left-right direction of the vehicle, and the inner rib 1021b is arranged upwardly inclined, which not only realizes the bending design of the connecting rib 1021, but also facilitates the bending deformation of the connecting rib 1021 under the impact of the side collision force, and can better promote the collapse energy absorption effect of the second part 102.

[0083] It should be noted that, in a specific implementation, the bending angle α of each connecting rib 1021 in the second portion 102 can be determined according to different design requirements. For example, the bending angle α of each connecting rib 1021 can be the same, or the bending angle α of at least some connecting ribs 1021 can be different from that of other connecting ribs 1021. Fig.12 As shown in , in this embodiment, for example, the bending angle α of each connecting rib 2011 can be gradually increased from bottom to top along the vertical direction of the vehicle.

[0084] At this time, by gradually increasing the bending angle α of each connecting rib 1021 from bottom to top, the differentiated design of the bending angle α of each connecting rib 1021 can be utilized, so that the connecting ribs 1021 with a small angle will be broken first when a collision occurs, and as the collision force increases, the upper connecting ribs 1021 will be further disconnected one by one. This can adapt to different collision force conditions and avoid other risks caused by the complete disconnection of the connecting ribs 1021 when a collision occurs.

[0085] In this embodiment, Fig.10 As shown in , as a preferred embodiment, the second part 102 located in the middle can be connected between the lower part of the first part 101 and the lower part of the third part 103, and based on this, a collapse space K located above the second part 102 is also formed between the first part 101 and the third part 103.

[0086] At this time, as an exemplary implementation form, the width of the above-mentioned crush space K in the left-right direction of the whole vehicle can be, for example, more than 20 mm. By connecting the second part 102 between the first part 101 and the lower part of the third part 103, and forming the crush space K above the second part 102, it can be understood that it can provide a crushing and stacking space for the first part 101 during a collision, which helps to improve the crushing and deformation effect of the first part 101, and at the same time can reduce the impact of the crushed and deformed first part 101 and second part 102 on the inner third part 103, which is conducive to ensuring that the third part 103 is not deformed or less deformed, and can better resist side collisions and improve the safety of the whole vehicle collision.

[0087] In this embodiment, as a preferred implementation form, the second transverse ribs 1031 in the third part 103 can also be configured as a plurality of ribs arranged at intervals along the vertical direction of the vehicle, and Fig.10 From the cross-section of the threshold beam 1 shown, in a specific implementation, for example, the cross-section of the threshold beam 1 can be a 21-grid structure, that is, 12 cavities are formed in the first portion 101 , 2 cavities are formed in the second portion 102 , and 7 cavities are formed in the third portion 103 .

[0088] Of course, in addition to making the cross-section of the threshold beam 1 a 21-grid structure, it is also possible to design the cavities in each part of the threshold beam 1 to be other numbers, as long as it adopts the structural design described above and can meet the application requirements of the threshold beam 1.

[0089] In this embodiment, as an exemplary implementation form, for the first transverse rib 1011 in the first part 101, the thickness of each separated rib segment 1011a can be, for example, 2.0 mm, 2.2 mm and 2.5 mm respectively, and in the second part 102, the thickness of the outer rib 1021a and the inner rib 1021b constituting the connecting rib 1021 can be, for example, 3.0 mm and 3.5 mm respectively, and the thickness of the second transverse rib 1031 in the third part 103 can be, for example, 3.5 mm.

[0090] In addition, it can be further understood that the threshold beam 1 of the present embodiment adopts the above structure, especially by arranging the first part 101, the second part 102 and the third part 103 arranged in sequence from the outside to the inside, and by the lateral rigidity of the first part 101 being smaller than that of the third part 103, and the second part 102 being arranged in a bent shape, so that the threshold beam 1 as a whole has an energy absorption zone formed by the first part 101, a bending zone formed by the second part 102, and a rigid zone formed by the third part 103. In this way, it is more conducive to understanding the collision energy absorption and protection effect of the threshold beam 1 of the present embodiment.

[0091] The force transmission structure of the vehicle body of the present embodiment is designed as above, by integrating the battery pack frame 2 with the vehicle body, so that the door sill beam 1 constitutes the side frame of the battery pack frame 2, and a plurality of battery pack cross beams are arranged between the door sill beams 1 on both sides. It can utilize the plurality of battery pack cross beams in the battery pack frame 2, as well as combine with the rear floor front cross beam 7, the front enclosure lower cross beam 8 and each seat cross beam 3 to increase the lateral stiffness and lateral force transmission channel of the vehicle body, which can improve the ability to cope with side collisions, and help to improve the safety of the whole vehicle in side collisions.

[0092] Embodiment 2

[0093] This embodiment relates to a vehicle, in which the force transmission structure of the vehicle body in the first embodiment is provided.

[0094] The vehicle of this embodiment can increase the lateral stiffness and lateral force transmission channel of the vehicle body by setting the force transmission structure in the first embodiment, can improve the ability to cope with side collisions, help to improve the safety of the whole vehicle in side collisions, and has a good application effect.

[0095] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A force transmission structure of a vehicle body, characterized in that: A battery pack frame (2) is integrated into the vehicle body, and the door sill beams (1) on the left and right sides of the vehicle body constitute the side frames on the left and right sides of the battery pack frame (2); The force transmission structure comprises a battery pack cross beam connected between the threshold beams (1) on both sides, the battery pack cross beam comprising a front cross beam (201) arranged near the front ends of the threshold beams (1) on both sides, a rear cross beam (202) arranged near the rear ends of the threshold beams (1) on both sides, and a reinforcing cross beam (205) located between the front cross beam (201) and the rear cross beam (202); A battery pack inner cavity (Q) is defined between the front cross beam (201), the rear cross beam (202) and the door sill beams (1) on both sides; the reinforcing cross beam (205) is located in the battery pack inner cavity (Q), and the reinforcing cross beam (205) is a plurality of cross beams arranged at intervals along the front-rear direction of the vehicle.

2. The force transmission structure of the vehicle body according to claim 1, characterized in that: The force transmission structure also includes a rear floor front cross beam (7) located at the rear side of the battery pack frame (2), the rear floor front cross beam (7) is connected between the door sill beams (1) on both sides, and a rear floor front cross beam cavity (N) is formed in the rear floor front cross beam (7).

3. The force transmission structure of the vehicle body according to claim 2, characterized in that: The force transmission structure further comprises a front enclosure lower cross beam (8) located at the front side of the battery pack frame (2); The front enclosure lower cross beam (8) is connected between the rear sections (5a) of the front cabin longitudinal beams on the left and right sides, and the rear section (5a) of the front cabin longitudinal beam on each side is connected to the threshold beam (1) on the same side through a torsion box (9); A front enclosure lower cross beam cavity (S) is formed between the front enclosure lower cross beam (8) and the front enclosure lower plate (6).

4. The force transmission structure of a vehicle body according to claim 1, characterized in that: The battery pack frame (2) comprises a battery pack upper cover (203) closing the top of the battery pack inner cavity (Q), and the battery pack upper cover (203) constitutes a front floor panel in the vehicle body; The force transmission structure also includes a seat crossbeam (3) located above the battery pack upper cover (203), and the seat crossbeam (3) is connected between the threshold beams (1) on both sides.

5. The force transmission structure of the vehicle body according to claim 4, characterized in that: The seat crossbeam (3) is roll-formed; and / or, The cross section of the seat cross beam (3) is in an "M" shape, and a plurality of seat cross beam cavities (M) arranged side by side are formed between the seat cross beam (3) and the battery pack upper cover (203).

6. The force transmission structure of the vehicle body according to claim 4, characterized in that: The seat cross beams (3) are multiple and are arranged at intervals along the front-rear direction of the vehicle; Viewed from the upper and lower directions of the vehicle, one of the seat cross beams (3) and one of the reinforcing cross beams (205) are arranged in correspondence with each other in the upper and lower directions and are located between the B-pillars (4) on the left and right sides of the vehicle body.

7. The force transmission structure of a vehicle body according to any one of claims 1 to 6, characterized in that: The door sill beam (1) and the battery pack cross beam are both made of extruded aluminum, and a plurality of cavities are formed in the door sill beam (1) and the battery pack cross beam.

8. The force transmission structure of the vehicle body according to claim 7, characterized in that: From the front-rear direction of the vehicle, the sill beams (1) on both sides have a first portion (101), a second portion (102) and a third portion (103) which are sequentially connected from outside to inside along the left-right direction of the vehicle; The mold cavity is formed in the first part (101), the second part (102) and the third part (103), and the second part (102) is arranged in a bent shape in the left-right direction of the vehicle; Each of the battery pack cross beams is connected between the third parts (103) on both sides.

9. The force transmission structure of a vehicle body according to claim 8, characterized in that: The first part (101) comprises a first transverse rib (1011) arranged along the left-right direction of the vehicle, the third part (103) comprises a second transverse rib (1031) arranged along the left-right direction of the vehicle, and the thickness of the first transverse rib (1011) is smaller than the thickness of the second transverse rib (1031); and / or, The second part (102) includes a connecting rib (1021) connected between the first part (101) and the third part (103); the connecting rib (1021) is bent and includes an outer rib (1021a) and an inner rib (1021b) connected together; the outer rib (1021a) is connected to the first part (101), and the inner rib (1021b) is connected to the third part (103).

10. A vehicle, characterized in that: The vehicle is provided with a vehicle body force transmission structure according to any one of claims 1 to 9.

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