Force transmission structure for side impact of vehicle body and automobile

Abstract

The application provides a force transmission structure for side collision of a vehicle body and a vehicle. The force transmission structure comprises a first force transmission structure at a bottom area of a door opening of the vehicle body and a second force transmission structure at a bottom area of a B column of the vehicle body. The first force transmission structure and the second force transmission structure each have a plurality of cavity structures arranged in connection. The plurality of cavity structures in the first force transmission structure and the second force transmission structure are arranged in a stack from outside to inside. In a direction from outside to inside, the bottom of the first force transmission structure and / or the second force transmission structure is arranged in a gradually rising trend. The force transmission structure for side collision of the vehicle body has the plurality of cavity structures arranged in a stack from outside to inside in the first force transmission structure and the second force transmission structure, which is beneficial to improving the strength and energy absorption effect of the force transmission structure. In addition, the bottom of the first force transmission structure and / or the second force transmission structure is arranged in a gradually rising trend, which is beneficial to further improving the strength of the force transmission structure, thereby improving the safety during side collision of the vehicle body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts, in particular to a force transmission structure for side collision of a vehicle body. BACKGROUND

[0002] Automobile safety refers to the performance of avoiding accidents and protecting pedestrians and passengers during driving. Collision safety is an important performance indicator of automobile safety. Collision safety is generally achieved by improving vehicle crashworthiness, increasing passenger restraint systems (such as using seat belts), and reducing the contact stiffness of personnel and interior components of the cockpit (such as using airbags and soft interiors). Among them, vehicle crashworthiness is the embodiment of the outermost protective barrier, which plays a crucial role in the safety of passengers and drivers.

[0003] Side collision is an important test item for collision safety. When a side collision occurs, the collision force acts on the lower part of the B-pillar and is transmitted to the other side of the vehicle body through the lower sill force transmission structure after being decomposed. Among them, the intersection area of the lower sill and the front floor cross beam is an auxiliary force transmission channel for side collision. At present, the intersection area of the lower sill and the front floor cross beam is designed by the side wall outer plate, the side wall sill beam, the floor sill beam, the front floor cross beam and the front floor.

[0004] Since the side wall sill beam and the floor sill beam form a sill cavity. When a side collision occurs, the collision force is transmitted from the sill cavity to the floor cross beam cavity and to the other side of the vehicle body. During the transmission of the collision force along the auxiliary force transmission channel, the energy is released through the thin plate area of the front floor, causing the thin plate area of the front floor to deform and collapse, which seriously damages the vehicle body and affects the safety performance of the vehicle.

[0005] In addition, the collision force acts on the lower part of the B-pillar and is transmitted to the other side of the vehicle body through the lower sill. The strength of the force transmission structure at the intersection area of the B-pillar and the lower sill plays a crucial role in side collision. However, the load-bearing effect of the force transmission structure at the intersection area is weak, and after a side collision, the metal sheet inside the driver's cabin will also bend and collapse, which seriously threatens the safety of passengers and drivers. SUMMARY

[0006] Therefore, the present application aims to provide a force transmission structure for side collision of a vehicle body to improve the safety of the vehicle body during side collision.

[0007] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0008] A force transmission structure for a side impact of a vehicle body, the force transmission structure comprising a first force transmission structure at a bottom area of a door opening of the vehicle body and a second force transmission structure at a bottom area of a B pillar of the vehicle body; the first force transmission structure and the second force transmission structure each having a plurality of cavity structures arranged in connection; wherein the plurality of cavity structures in the first force transmission structure and the second force transmission structure are arranged in a stack from outside to inside; and a bottom of the first force transmission structure and / or the second force transmission structure is arranged in a gradually rising trend in a direction from outside to inside.

[0009] Further, the first force transmission structure further has an energy absorption space; the energy absorption space is formed above the cavity structure at the outermost side in the first force transmission structure and outside the cavity structure at the next outermost side in the first force transmission structure.

[0010] Further, the first force transmission structure comprises a side wall rocker, a floor rocker, a front floor cross beam, a front floor longitudinal beam, a front floor, and a first connecting plate for connecting the floor rocker and the front floor longitudinal beam; the plurality of cavity structures in the first force transmission structure comprises a first cavity structure formed between the side wall rocker and the floor rocker, a second cavity structure formed between the floor rocker, the first connecting plate, the front floor longitudinal beam, the front floor, and the front floor cross beam, and the energy absorption space is formed above the first cavity structure and outside the second cavity structure.

[0011] Further, the first force transmission structure further comprises a front floor middle cross beam; the plurality of cavity structures in the first force transmission structure further comprises a third cavity structure formed between the front floor longitudinal beam and the front floor, and a fourth cavity structure formed between the front floor, the front floor longitudinal beam, and the front floor middle cross beam.

[0012] Further, the front floor longitudinal beam is below the front floor; a front floor upper longitudinal beam corresponding to the front floor longitudinal beam is arranged above the front floor; the plurality of cavity structures in the first force transmission structure further comprises a fifth cavity structure formed between the front floor upper longitudinal beam and the front floor.

[0013] Further, the door opening of the vehicle body is a front door opening of the vehicle body.

[0014] Further, the second force transmission structure comprises the side wall rocker beam, the floor rocker beam, the front floor, the front floor longitudinal beam, and a second connecting plate for connecting the floor rocker beam and the front floor longitudinal beam; the plurality of cavity structures in the second force transmission structure comprises a sixth cavity structure formed between the side wall rocker beam and the floor rocker beam, and a seventh cavity structure formed between the floor rocker beam, the front floor, the front floor longitudinal beam and the second connecting plate.

[0015] Further, the plurality of cavity structures in the second force transmission structure further comprises an eighth cavity structure formed between the front floor longitudinal beam and the front floor; the seventh cavity structure and the eighth cavity structure are arranged in sequence inside the sixth cavity structure.

[0016] Further, the front floor longitudinal beam is provided with a front floor longitudinal beam reinforcing plate; the front floor longitudinal beam reinforcing plate divides the eighth cavity structure into an upper cavity and a lower cavity.

[0017] Further, the vehicle body B column comprises a B column inner plate and a B column reinforcing plate; a ninth cavity structure is formed between the B column inner plate, the B column reinforcing plate and the side wall rocker beam; the ninth cavity structure is located above the sixth cavity structure.

[0018] Further, the side wall rocker beam is provided with a side wall outer plate on the outside thereof; the B column reinforcing plate is located between the side wall rocker beam and the side wall outer plate; the side wall rocker beam is provided with a side wall rocker beam reinforcing plate on the inside thereof; and the floor rocker beam is provided with a floor rocker beam reinforcing plate on one side thereof.

[0019] Further, the side wall rocker beam is formed with a convex protruding portion corresponding to the vehicle body B column; the protruding portion is connected with the B column inner plate; and the profiles of the two sides of the protruding portion are arc-shaped with gradually changing heights.

[0020] Further, the second force transmission structure further comprises a front floor lower cross beam arranged inside the front floor longitudinal beam and located below the front floor; and the plurality of cavity structures in the second force transmission structure further comprises a tenth cavity structure formed between the front floor lower cross beam, the front floor and the front floor longitudinal beam.

[0021] Further, the second force transmission structure further comprises a front floor upper cross beam arranged above the front floor; and the plurality of cavity structures in the second force transmission structure further comprises an eleventh cavity structure formed between the front floor upper cross beam and the front floor.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] The force transmission structure for side collision of the vehicle body has the first force transmission structure and the second force transmission structure, which are stacked from outside to inside and have a plurality of cavity structures, so that the strength and energy absorption effect of the force transmission structure are improved, and the bottom of the first force transmission structure and / or the second force transmission structure is gradually raised, so that the strength of the force transmission structure is further improved, thereby improving the safety during side collision of the vehicle body.

[0024] In addition, another object of the present application is to provide a vehicle, which has the force transmission structure for side collision of the vehicle body as described above.

[0025] The vehicle described in the present application can improve the safety during side collision by using the force transmission structure as described above, and has good practicability. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application, and are incorporated herein for explanation by reference. The present application will become more fully understood from the detailed description and accompanying drawings, and numerous embodiments of the application will be apparent to one skilled in the art.

[0027] Figure 1 is a left side view of the vehicle body according to the first embodiment of the present application;

[0028] Figure 2 is a cross-sectional view of the A-A direction in Figure 1

[0029] Figure 3 is a schematic diagram of the force transmission direction of the collision force on the first force transmission structure described in Figure 2

[0030] Figure 4 is a cross-sectional view of the B-B direction in Figure 1

[0031] Figure 5 is a schematic diagram of the force transmission direction of the collision force on the second force transmission structure described in Figure 4

[0032] Figure 6 is a schematic diagram of the force transmission structure according to the first embodiment of the present application from a first perspective;

[0033] Figure 7 is a schematic diagram of the force transmission structure according to the first embodiment of the present application from a second perspective;

[0034] Figure 8 is a schematic diagram of the force transmission structure according to the first embodiment of the present application from a third perspective;

[0035] Figure 9 is a schematic diagram of the rocker beam according to the first embodiment of the present application; ​​​​

[0036] Figure 10 Structure diagram of the floor threshold beam and the floor threshold beam reinforcing plate according to the embodiment one of the present application;

[0037] Figure 11 Structure diagram of the side threshold beam according to the embodiment one of the present application from a perspective;

[0038] Figure 12 Structure diagram of the side threshold beam according to the embodiment one of the present application from another perspective;

[0039] Figure 13 Left view of the side threshold beam according to the embodiment one of the present application;

[0040] Figure 14 C-C direction sectional view of the front threshold beam according to the embodiment one of the present application; Figure 13

[0041] D-D direction sectional view of the front threshold beam according to the embodiment one of the present application; Figure 15 Figure 13 Structure diagram of the front threshold beam and the first connecting plate according to the embodiment one of the present application from a perspective;

[0042] Figure 16 Structure diagram of the front threshold beam and the first connecting plate according to the embodiment one of the present application from another perspective;

[0043] Figure 17 Structure diagram of the first connecting plate and the second connecting plate according to the embodiment one of the present application;

[0044] Figure 18 Structure diagram of the side threshold beam and the side outer plate according to the embodiment one of the present application;

[0045] Figure 19 Structure diagram of the side threshold beam and the B pillar reinforcing plate according to the embodiment one of the present application;

[0046] Figure 20 Structure diagram of the second connecting plate according to the embodiment one of the present application from a perspective;

[0047] Figure 21 Structure diagram of the second connecting plate according to the embodiment one of the present application from another perspective;

[0048] Figure 22 Explanation of reference numerals:

[0049] 100, front door opening; 200, rear door opening;

[0050]

[0051] ​​1, side wall outer plate; 2, front floor; 3, B column inner plate; 4, rocker beam; 5, first connecting plate; 6, second connecting plate;

[0052] 10, first cavity structure; 11, second cavity structure; 12, third cavity structure; 13, fourth cavity structure; 14, fifth cavity structure; 15, energy absorption space;

[0053] 20, ninth cavity structure; 21, sixth cavity structure; 22, seventh cavity structure; 23, lower cavity; 24, upper cavity; 25, tenth cavity structure; 26, eleventh cavity structure;

[0054] 201, front floor upper longitudinal beam; 202, front floor longitudinal beam; 203, front floor beam; 204, front floor middle cross beam; 205, front floor lower cross beam; 206, front floor longitudinal beam reinforcing plate; 207, front floor upper cross beam;

[0055] 301, B column reinforcing plate;

[0056] 401, side wall rocker beam; 402, floor rocker beam; 403, side wall rocker beam reinforcing plate; 404, floor rocker beam reinforcing plate; 405, bracket; 406, protrusion;

[0057] 601, first connecting part; 602, second connecting part. DETAILED DESCRIPTION

[0058] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0059] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer", "front", "rear" and the like appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application. The devices or elements indicated or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first" to "eleventh" appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0060] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connection", "connection", "connector" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0061] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0062] Embodiment One

[0063] The present embodiment relates to a force transmission structure for a side impact of a vehicle body. Overall, the force transmission structure comprises a first force transmission structure at a bottom region of a door opening of the vehicle body, and a second force transmission structure at a bottom region of a B-pillar of the vehicle body. Both the first force transmission structure and the second force transmission structure have a plurality of cavity structures arranged in connection. The plurality of cavity structures in the first force transmission structure and the second force transmission structure are arranged in a stack from outside to inside. In the direction from outside to inside, the bottom of the first force transmission structure and / or the second force transmission structure is arranged in a gradually rising trend.

[0064] Based on the overall structure as described above, the vehicle body described in the present embodiment can adopt the vehicle body structure of the prior art applied to MPV (Multi-Purpose Vehicle) models, SUV (Sport Utility Vehicle) models, or other models with higher strength requirements. The following takes the application of the force transmission structure on the vehicle body of the MPV model as an example to describe the structure of the force transmission structure.

[0065] An exemplary structure of the vehicle body in the present embodiment is shown in Figure 1 In the present embodiment, a front door opening 100 for mounting a front door and a rear door opening 200 for mounting a rear door are respectively arranged on the left and right sides of the vehicle body, and the front door opening 100 and the rear door opening 200 are separated by a B-pillar. Considering that the structures on the left and right sides of the vehicle body are symmetrically arranged, and in order to highlight the specific positions and structures of the first force transmission structure and the second force transmission structure, only the relevant structure of the front door opening 100 on the left side of the vehicle body is shown in the drawing. The first force transmission structure will be described first.

[0066] The first force transmission structure in the present embodiment also has an energy absorption space 15. The energy absorption space 15 is formed above the outermost cavity structure in the first force transmission structure and outside the next outer cavity structure in the first force transmission structure. At this time, the collision energy is absorbed by the collapse deformation at the energy absorption space 15, thereby weakening the collision force.

[0067] As a preferred embodiment, the first force transmission structure in the present embodiment is specifically arranged at the bottom region of the front door opening 100 to improve the strength and energy absorption effect of the auxiliary force transmission channel of the side impact. Figure 2 、 Figures 6 to 8An exemplary structure of the first force transmission structure is specifically shown. The first force transmission structure comprises the side wall rocker beam 401, the floor rocker beam 402, the front floorboard beam 203, the front floor longitudinal beam 202, the front floorboard 2, and the first connecting plate 5 for connecting the floor rocker beam 402 and the front floor longitudinal beam 202.

[0068] In the embodiment, the plurality of cavity structures in the first force transmission structure comprises a first cavity structure 10 formed between the side wall rocker beam 401 and the floor rocker beam 402, and a second cavity structure 11 formed between the floor rocker beam 402, the first connecting plate 5, the front floor longitudinal beam 202, the front floorboard 2 and the front floorboard beam 203. The energy absorption space 15 is formed above the first cavity structure 10 and outside the second cavity structure 11.

[0069] As a further preferred embodiment, the first force transmission structure of the embodiment further comprises the front floorboard middle cross beam 204, and at this time, the plurality of cavity structures further comprises a third cavity structure 12 formed between the front floor longitudinal beam 202 and the front floorboard 2, and a fourth cavity structure 13 formed between the front floorboard 2, the front floor longitudinal beam 202 and the front floorboard middle cross beam 204.

[0070] In combination Figures 6 to 8 As shown in the embodiment, the front floorboard 2 is a plate-shaped structure arranged at the front part of the vehicle body. The front floor longitudinal beam 202 is arranged on the left and right sides of the bottom of the front floorboard 2 and extends along the length direction of the vehicle body. The front floorboard middle cross beam 204 is arranged between the two front floor longitudinal beams 202 along the width direction of the vehicle body corresponding to the bottom area of the front door opening 100.

[0071] As a preferred embodiment, the front floor longitudinal beam 202 and the front floorboard middle cross beam 204 are both in the shape of a U. In this way, the third cavity structure 12 formed between the front floor longitudinal beam 202 and the front floorboard 2, and the fourth cavity structure 13 formed between the front floorboard 2, the front floor longitudinal beam 202 and the front floorboard middle cross beam 204 can be formed. In addition, the third cavity structure 12 and the fourth cavity structure 13 have a gradually decreasing cross-sectional area from top to bottom, thereby improving the strength of the first force transmission structure and having a better energy absorption effect.

[0072] It can be understood that the front floor longitudinal beam 202 and the front floorboard middle cross beam 204 in the embodiment can adopt other shapes, or only one of the two is in the shape of a U. As long as the front floor longitudinal beam 202 and the front floorboard middle cross beam 204 can be fixed to the front floorboard 2 and can form the corresponding cavity structure.

[0073] In the specific implementation of the embodiment, it needs to be particularly noted that, as Figure 2 and Figure 6As shown in the figure, the bottom of the front floor middle crossbeam 204 is higher than the bottom of the front floor longitudinal beam 202, that is, there is a height difference between the bottoms of the two. Such a setting is conducive to making the bottom of the formed first force transmission structure have a gradually rising trend.

[0074] In addition, to further improve the structural strength and energy absorption effect of the first force transmission structure, as Figure 2 and Figure 6 shown in the figure, a front floor upper longitudinal beam 201 corresponding to the front floor longitudinal beam 202 is provided above the front floor 2. The multiple cavity structures in this embodiment further include a fifth cavity structure 14 formed by enclosing between the front floor upper longitudinal beam 201 and the front floor 2. Here, by arranging the fifth cavity structure 14 and the third cavity structure 12 up and down in the vehicle body height direction, it is conducive to improving the strength of the first force transmission structure at this place and is conducive to absorbing and weakening the collision force.

[0075] It can be seen from Figure 2 the figure that the front floor upper longitudinal beam 201 is also in a U-shape to have a better use effect. However, like the front floor longitudinal beam 202, the front floor upper longitudinal beam 201 here can also adopt other shapes as long as it can enclose and form the fifth cavity structure 14 with the front floor 2.

[0076] Here, it is worth noting that in this embodiment, the height of the third cavity structure 12 is greater than the height of the fifth cavity structure 14 to achieve the purpose of making the bottom of the first force transmission structure have a gradually rising trend, thereby improving the collision resistance ability of the first force transmission structure.

[0077] It can be understood that the higher the height of the fifth cavity structure 14 and the larger the cross-sectional area, the better the use effect of its energy absorption and weakening and attenuating energy. However, in this embodiment, the fifth cavity structure 14 is limited by the layout space, so the height of the fifth cavity structure 14 is relatively low. When specifically arranging the front floor upper longitudinal beam 201, the fifth cavity structure 14 can be increased as much as possible according to the actual installation space.

[0078] The sill beam 4 in this embodiment is provided on the left and right sides of the front floor 2, and in the vehicle body height direction, the sill beam 4 is located below the front floor 2. As Figure 9 shown in the figure, the sill beam 4 includes a side sill beam 401 on the outside and a floor sill beam 402 on the inside. The openings of the two are arranged opposite to each other and are fixedly connected by buckling to enclose and form the above-mentioned first cavity structure 10.

[0079] The structure of the floor sill beam 402 in this embodiment is as Figure 10 shown in the figure, and an exemplary structure of the side sill beam 401 is as Figures 11 to 13As shown in FIG. 1, both of them are arranged in the length direction of the vehicle body, and are formed with openings arranged oppositely, so as to form the first cavity structure 10 in a left and right clamping manner.

[0080] The front floor beam 203 in the embodiment is arranged between the front floor 2 and the floor rocker beam 402, so as to realize the connection between the rocker beam 4 and the front floor 2. The structure of the front floor beam 203 is referred to Figures 16 to 18 As shown in FIG. 1, the front floor beam 203 is L-shaped, and its height is adapted to the height difference between the front floor 2 and the floor rocker beam 402.

[0081] As shown in FIG. 1, the front floor beam 203 is L-shaped, and its height is adapted to the height difference between the front floor 2 and the floor rocker beam 402. Figure 2 As shown in FIG. 1, due to the arrangement of the front floor beam 203, the energy absorption space 15 is formed above the floor rocker beam 402 and at the outer side of the front floor beam 203. The shape of the energy absorption space 15 is as shown by the dotted line in FIG. 1, which is generally rectangular. The energy absorption space 15 provides space for the collapse of the structure at the lower right corner thereof, so as to absorb the collision energy by means of collapse, thereby weakening the collision force transmitted to the second cavity structure 11. Figure 3 The positional relationship between the first connecting plate 5 and the front floor middle beam 204 in the embodiment is referred to

[0082] As shown in FIG. 1, both of them are arranged on the left and right sides of the front floor longitudinal beam 202 oppositely, so as to transmit the collision force to the third cavity structure 12 via the second cavity structure 11. In addition, the left end of the first connecting plate 5 is connected to the floor rocker beam 402, so as to facilitate the transmission and weakening of the collision force transmitted to the rocker beam 4 at the bottom area of the front door opening 100. Figure 18 As a preferred embodiment, as shown in FIG. 1 and

[0083] and Figure 16 As shown in FIG. 1 and Figure 17 , the first connecting plate 5 is in the shape of a few characters, the left end of the first connecting plate 5 is connected to the floor rocker beam 402, the right end of the first connecting plate 5 is connected to the front floor longitudinal beam 202, and the top of the first connecting plate 5 is connected to the bottom of the front floor 2.

[0084] It should be noted that in the embodiment, the bottom of the first connecting plate 5, i.e. the bottom surface, is arranged obliquely, and the bottom of the second cavity structure 11 has a gradually rising trend. In the embodiment, the structure of the first connecting plate 5 is simple, facilitating installation, and also facilitating the formation of the second cavity structure 11. The oblique arrangement of the bottom of the first connecting plate 5 can cooperate with the third cavity structure 12 and the fourth cavity structure 13, so as to facilitate the gradually rising trend of the bottom of the entire first force transmission structure.

[0085] And due to the bottom of the front floor longitudinal beam 202 is lower than the bottom of the front floor cross beam 204, so that the first cavity structure 10, the second cavity structure 11, the third cavity structure 12, and the partial fourth cavity structure 13 form a shape as shown by the dashed box in Figure 3 , which is close to a right trapezoidal structure with the rectangular energy absorption space 15. In this way, the bearing section of the first force transmission structure gradually decreases along the direction from outside to inside, which is beneficial to improve the structural strength of the first force transmission structure and improve the weakening effect of the force transmission structure on the collision force.

[0086] In detail, as shown in Figure 3 , the vertical dashed line at the leftmost side of the entire dashed box is on the plane where the side wall rocker beam 401 and the floor rocker beam 402 are combined, which constitutes the lower base of the right trapezoidal. The vertical dashed line at the rightmost side of the entire dashed box is at the left end of the fourth cavity structure 13, which constitutes the upper base of the right trapezoidal. The dashed line at the top of the entire dashed box is coplanar with the front floor 2 along the horizontal direction, which constitutes the right angle waist of the right trapezoidal. And the bottom dashed line of the entire dashed box is arranged obliquely upward from outside to inside, which constitutes the oblique waist of the right trapezoidal.

[0087] In this embodiment, the plurality of cavity structures stacked from outside to inside in the first force transmission structure are beneficial to improve the strength of the first force transmission structure and have good energy absorption effect. And the energy absorption space 15 as the weakening area in the entire first force transmission structure cooperates with the plurality of cavity structures to form a complementary effect of strength and weakness, thereby improving the energy absorption effect of the force transmission structure and improving the safety performance of the vehicle body side collision.

[0088] In detail, when the vehicle body side bears the collision force, the collision force is decomposed in the length direction of the vehicle body through the rocker beam 4, and then enters the first force transmission structure in the bottom area of the front door opening 100. The transmission direction of the collision force on the first force transmission structure is as shown in Figure 3 , the collision force first invades the first cavity structure 10, at this time, the rocker beam 4 and the front pedal beam 203 at the energy absorption space 15 collapse and deform, and part of the collision energy is absorbed and weakened.

[0089] And the weakened collision force is transmitted to the second cavity structure 11, transmitted to the third cavity structure 12 through the second cavity structure 11 obliquely upward, and then transmitted to the fourth cavity structure 13 and the other side of the vehicle body through the third cavity structure 12 to the right. At the same time, the third cavity structure 12 also transmits the collision force upward to the fifth cavity structure 14. In the entire transmission process, each cavity structure can absorb the collision energy, thereby improving the safety performance of the vehicle body side collision.

[0090] The second force transmission structure in the embodiment includes the side wall rocker beam 401, the floor rocker beam 402, the front floor 2, the front floor longitudinal beam 202, and the second connecting plate 6 for connecting the floor rocker beam 402 and the front floor longitudinal beam 202. The plurality of cavity structures in the second force transmission structure includes a sixth cavity structure 21 formed by the side wall rocker beam 401 and the floor rocker beam 402. A seventh cavity structure 22 formed by the floor rocker beam 402, the front floor 2, the front floor longitudinal beam 202, and the second connecting plate 6.

[0091] As preferred, the plurality of cavity structures in the second force transmission structure in the embodiment further includes an eighth cavity structure formed by the front floor longitudinal beam 202 and the front floor 2. The seventh cavity structure 22 and the eighth cavity structure are arranged in sequence inside the sixth cavity structure 21.

[0092] As preferred, in the embodiment, the front floor longitudinal beam 202 is provided with a front floor longitudinal beam reinforcing plate 206. The front floor longitudinal beam reinforcing plate 206 divides the eighth cavity structure into an upper cavity 24 and a lower cavity 23. As shown in Figure 2 , the front floor longitudinal beam reinforcing plate 206 is in a U shape, which is located in the lower middle part of the eighth cavity structure, and makes the cross-sectional area of the upper cavity 24 larger than that of the lower cavity 23.

[0093] In the embodiment, the eighth cavity structure is divided into the upper cavity 24 and the lower cavity 23 stacked in the vehicle height direction by the front floor longitudinal beam reinforcing plate 206, which is beneficial to improve the strength structure of the front floor longitudinal beam 202 and the energy absorption effect of the collision. It can be understood that in the embodiment, a plurality of front floor longitudinal beam reinforcing plates 206 can also be arranged in the eighth cavity structure to make the eighth cavity structure have a plurality of cavities in the height direction.

[0094] When a plurality of front floor longitudinal beam reinforcing plates 206 are used, there are significant advantages in the improvement effect of structural strength and the energy absorption effect of the collision. However, the advantages in the arrangement difficulty and the production cost are not obvious. Therefore, in the specific implementation, a reasonable number of front floor longitudinal beam reinforcing plates 206 can be selected according to the specific use requirements.

[0095] As shown in Figure 4 , Figure 19 and Figure 20 , the B pillar of the vehicle body B in the embodiment includes the B pillar inner plate 3 and the B pillar reinforcing plate 301. A ninth cavity structure 20 is formed by the B pillar inner plate 3, the B pillar reinforcing plate 301, and the side wall rocker beam 401. The ninth cavity structure 20 is located above the sixth cavity structure 21.

[0096] To further improve the structural strength and energy absorption effect of the force transmission structure, as shown in Figure 4 , Figures 6 to 8As shown in FIG. 1, the second force transmission structure in the embodiment further comprises a front floor lower cross beam 205 arranged inside the front floor longitudinal beam 202 and located at the lower side of the front floor 2. The front floor lower cross beam 205 extends along the vehicle width direction and is connected to the two front floor longitudinal beams 202 at the two ends thereof. The plurality of cavity structures in the second force transmission structure further comprises a tenth cavity structure 25 formed by the front floor lower cross beam 205, the front floor 2 and the front floor longitudinal beam 202.

[0097] The second force transmission structure in the embodiment further comprises a front floor upper cross beam 207. The front floor upper cross beam 207 extends along the vehicle width direction and is connected to the front floor 2 at the bottom of the B pillar. The plurality of cavity structures further comprises an eleventh cavity structure 26 formed by the front floor upper cross beam 207 and the front floor 2.

[0098] In the embodiment, the eleventh cavity structure 26 is located above the seventh cavity structure 22, the eighth cavity structure and the tenth cavity structure 25, which is beneficial to improve the strength of the force transmission structure. At the same time, the collision force can be transmitted and absorbed in the length direction and the height direction of the vehicle body.

[0099] As shown in FIG. 1, the second force transmission structure in the embodiment further comprises a front floor lower cross beam 205 arranged inside the front floor longitudinal beam 202 and located at the lower side of the front floor 2. The front floor lower cross beam 205 extends along the vehicle width direction and is connected to the two front floor longitudinal beams 202 at the two ends thereof. The plurality of cavity structures in the second force transmission structure further comprises a tenth cavity structure 25 formed by the front floor lower cross beam 205, the front floor 2 and the front floor longitudinal beam 202. Figure 4 As shown in FIG. 1, the second force transmission structure in the embodiment further comprises a front floor lower cross beam 205 arranged inside the front floor longitudinal beam 202 and located at the lower side of the front floor 2. The front floor lower cross beam 205 extends along the vehicle width direction and is connected to the two front floor longitudinal beams 202 at the two ends thereof. The plurality of cavity structures in the second force transmission structure further comprises a tenth cavity structure 25 formed by the front floor lower cross beam 205, the front floor 2 and the front floor longitudinal beam 202.

[0100] It should be noted that the higher the height of the eleventh cavity structure 26 is, the larger the cross-sectional area is, and the better the absorption and weakening effect of the collision energy is. However, the height of the eleventh cavity structure 26 is limited by the arrangement space. Therefore, according to the actual installation space, the eleventh cavity structure 26 should be increased as much as possible.

[0101] The second connecting plate 6 in the embodiment corresponds to the bottom of the B pillar and is connected to the front floor rocker beam 402, the front floor 2 and the front floor longitudinal beam 202, so as to transmit the collision force received by the sixth cavity structure 21 to the eighth cavity structure.

[0102] As shown in FIG. 1, the second force transmission structure in the embodiment further comprises a front floor lower cross beam 205 arranged inside the front floor longitudinal beam 202 and located at the lower side of the front floor 2. The front floor lower cross beam 205 extends along the vehicle width direction and is connected to the two front floor longitudinal beams 202 at the two ends thereof. The plurality of cavity structures in the second force transmission structure further comprises a tenth cavity structure 25 formed by the front floor lower cross beam 205, the front floor 2 and the front floor longitudinal beam 202. Figure 18 Figure 21 As shown in FIG. 1, the second force transmission structure in the embodiment further comprises a front floor lower cross beam 205 arranged inside the front floor longitudinal beam 202 and located at the lower side of the front floor 2. The front floor lower cross beam 205 extends along the vehicle width direction and is connected to the two front floor longitudinal beams 202 at the two ends thereof. The plurality of cavity structures in the second force transmission structure further comprises a tenth cavity structure 25 formed by the front floor lower cross beam 205, the front floor 2 and the front floor longitudinal beam 202. Figure 22 As shown in FIG. 1, the second force transmission structure in the embodiment further comprises a front floor lower cross beam 205 arranged inside the front floor longitudinal beam 202 and located at the lower side of the front floor 2. The front floor lower cross beam 205 extends along the vehicle width direction and is connected to the two front floor longitudinal beams 202 at the two ends thereof. The plurality of cavity structures in the second force transmission structure further comprises a tenth cavity structure 25 formed by the front floor lower cross beam 205, the front floor 2 and the front floor longitudinal beam 202.​

[0103] As Figure 4 In the embodiment, the second connecting plate 6 is arranged obliquely at the bottom, which can cooperate with the eighth cavity structure and the tenth cavity structure 25, so that the bottom of the entire second force transmission structure has a gradually increasing trend, and the structural strength of the force transmission structure and the weakening effect of the collision force are improved. The force transmission area of the seventh cavity structure 22 is arranged gradually smaller from the outside to the inside, which has good structural strength.

[0104] In specific implementation, the second connecting plate 6 in the embodiment includes a first connecting part 601 and a second connecting part 602 located behind the first connecting part 601. The first connecting part 601 and the second connecting part 602 are both L-shaped, and are formed into a U-shaped second connecting plate 6 by splicing and fixed connection. Of course, the second connecting plate 6 in the embodiment can also be processed by one-piece forming.

[0105] In the embodiment, as Figure 6 described in the embodiment, the outer side of the side wall rocker beam 401 is provided with a side wall outer plate 1, and the B-pillar reinforcing plate 301 is located between the side wall rocker beam 401 and the side wall outer plate 1. The side wall outer plate 1 in the embodiment can adopt a mature structure in the prior art, and a front door opening 100 is formed thereon. In addition, in the embodiment, the inner side of the side wall rocker beam 401 is provided with a side wall rocker beam reinforcing plate 403, and one side of the floor rocker beam 402 is provided with a floor rocker beam reinforcing plate 404.

[0106] Specifically, as Figure 10 shown in the embodiment, the floor rocker beam reinforcing plate 404 is specifically arranged on the side of the floor rocker beam 402 facing the first cavity structure 10, and is adapted to the shape of the floor rocker beam 402. Of course, it is also feasible to arrange the floor rocker beam reinforcing plate 404 on the other side of the floor rocker beam 402, but the arrangement of the floor rocker beam reinforcing plate 404 in the first cavity structure 10 is better in comprehensive use effect.

[0107] Continuing to refer to Figure 10 , at one end of the floor rocker beam reinforcing plate 404, a bracket 405 is arranged in the floor rocker beam 402 at the bottom of the B-pillar, which is also U-shaped, and the top end and the bottom end thereof are connected to the floor rocker beam 402, respectively, and form an energy absorption cavity with the floor rocker beam 402. Here, the bracket 405 has a simple structure, is convenient to arrange on the floor rocker beam 402, and can also relieve the collision energy borne by the rocker beam 4 by itself through energy absorption.

[0108] Referring to Figure 12As shown in the figure, the side sill beam reinforcement plate 403 in this embodiment is adapted to the shape of the inner side of the side sill beam 401 and extends from the front end of the front door opening 100 to the rear end, so as to specifically improve the structural strength of the sill beam 4 corresponding to the bottom area of ​​the front door opening 100 and improve the absorption effect of collision force.

[0109] To further improve the structural strength and force transmission effect of the second force transmission structure at the bottom of the B-pillar, in this embodiment, a protruding portion 406 is formed on the side sill beam 401 at the position corresponding to the B-pillar of the vehicle body. The protruding portion 406 is connected to the inner panel 3 of the B-pillar, and the contours on both sides of the protruding portion 406 are arcs with gradually changing heights.

[0110] In terms of specific structure, combined Figures 11 to 13 As shown in the illustration, in this embodiment, the protrusion 406 is located at the top of the side sill beam 401 and is arranged obliquely upward toward the floor sill beam 402. The edge of the protrusion 406 overlaps with the inner panel 3 of the B-pillar and forms a... Figure 4 The bottom surface of the ninth cavity structure 20.

[0111] Combination Figures 11 to 13 As shown, the middle portion of the side sill beam 401 located at the bottom region of the front door opening 100 has a uniform cross-section along the length of the vehicle body. However, due to the protrusion 406, the cross-section of the side sill beam 401 at the corresponding position is increased.

[0112] For ease of description, in this embodiment, the cross-section of the side sill beam 401 located at the bottom region of the front door opening 100 is referred to as the first cross-section, while the cross-section of the side sill beam 401 with the protrusion 406 is referred to as the second cross-section. Figure 14 and Figure 15 As shown, the bottom ends of the first and second sections are at the same height, while the top end of the second section is higher than the top end of the first section, and the top end of the second section is closer to the vehicle interior than the top end of the first section.

[0113] In this embodiment, by providing the protrusion 406, the cavity space of the sixth cavity structure 21 connecting the front door opening 100 and the rear door opening 200 can be increased, which can help improve the structural strength of the bottom sill beam 4 of the B-pillar, thereby effectively resisting the impact force of the collision and mitigating the damage caused by the collision force to the vehicle body and the occupants in the driver's cab.

[0114] As a preferred embodiment, such as Figure 13 As shown, the contours of the protrusion 406 on both sides are arcs with gradually changing heights, meaning the width of the protrusion 406 gradually decreases along the direction away from the side sill beam 401. This allows the sill beam 4 to absorb collision energy more effectively, thereby further weakening the rearward transmission of collision force.

[0115] In this embodiment, the bottom of the ninth cavity structure 20, the left end of the tenth cavity structure 25, the sixth cavity structure 21, the seventh cavity structure 22, the eighth cavity structure, and the eleventh cavity structure 26 together constitute a cross section of the second force transmission structure close to a right trapezoid. Figure 5 That is, the force transmission cross section of the second force transmission structure gradually decreases in the direction from outside to inside, which is beneficial to improve the structural strength of the second force transmission structure and to improve the absorption and weakening effect of the second force transmission structure on the collision energy.

[0116] Specifically, as shown in Figure 5 the vertical dashed line at the leftmost side of the entire dashed frame is on the plane where the side wall outer plate 1 is located, which constitutes the lower base of the right trapezoid. The vertical dashed line at the rightmost side of the entire dashed frame is at the left end of the tenth cavity structure 25, which constitutes the upper base of the right trapezoid. The horizontal dashed line at the top of the entire dashed frame is coplanar with the front floor 2 and simultaneously serves as the right angle waist of the right trapezoid. The dashed line at the bottom of the entire dashed frame, which is arranged obliquely upward from outside to inside, constitutes the oblique waist of the right trapezoid.

[0117] In this embodiment, when a side collision occurs, the intersection area of the ninth cavity structure 20 and the sixth cavity structure 21, which serves as the lower base of the entire right trapezoid, jointly receives the collision force and transmits and weakens the collision force in the direction of the height of the vehicle body, thereby facilitating the improvement of the safety performance of the vehicle body during side collision.

[0118] When the vehicle body side bears the collision force, the force transmission direction of the collision force on the second force transmission structure is as shown in Figure 5 As shown in

[0119] The collision force transmitted to the upper cavity 24 can be transmitted in three directions, i.e., to the right to the tenth cavity structure 25, downward to the lower cavity 23 structure, and upward to the eleventh cavity structure 26. Among them, the collision force transmitted to the eleventh cavity structure 26 and the collision force transmitted to the tenth cavity structure 25 can be transmitted to the other side of the vehicle body along the horizontal direction.

[0120] In addition, the ninth cavity structure 20, the sixth cavity structure 21, the seventh cavity structure 22, and the eighth cavity structure can also transmit, absorb, and weaken the collision force in the height direction and the length direction of the vehicle body through their own cavity structures, thereby facilitating the reduction of the influence of side collision on the safety of the vehicle body and the passengers in the cab. In addition, the ninth cavity structure 20, the sixth cavity structure 21, the seventh cavity structure 22, and the eighth cavity structure can also transmit, absorb, and weaken the collision force in the height direction and the length direction of the vehicle body through their own cavity structures, thereby facilitating the reduction of the influence of side collision on the safety of the vehicle body and the passengers in the cab. In addition, the ninth cavity structure 20, the sixth cavity structure 21, the seventh cavity structure 22, and the eighth cavity structure can also transmit, absorb, and weaken the collision force in the height direction and the length direction of the vehicle body through their own cavity structures, thereby facilitating the reduction of the influence of side collision on the safety of the vehicle body and the passengers in the cab.

[0121] It should be particularly pointed out that in the embodiment, only the bottom of the first force transmission structure or the second force transmission structure can be arranged in a gradually rising trend. At this time, the entire force transmission structure also has good structural strength. However, compared with the scheme in which the bottom of the first force transmission structure and the second force transmission structure both have a gradually rising trend, the comprehensive use effect is slightly inferior.

[0122] The force transmission structure for side collision of the vehicle body in the embodiment has the plurality of cavity structures arranged from the outside to the inside in the first force transmission structure and the second force transmission structure, which is beneficial to improve the strength and energy absorption effect of the force transmission structure, and the bottom of the first force transmission structure and / or the second force transmission structure has a gradually rising trend, which is beneficial to further improve the strength of the force transmission structure, thereby improving the safety during side collision of the vehicle body.

[0123] Embodiment two

[0124] The embodiment also relates to an automobile, and the vehicle body of the automobile has the force transmission structure for side collision of the vehicle body in the embodiment one.

[0125] The automobile in the embodiment can improve the safety during side collision by arranging the force transmission structure in the embodiment one, and has good practicability.

[0126] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A force transmission structure for a side impact of a vehicle body, characterized in that: the force transmission structure comprises a first force transmission structure at a bottom area of a door opening of the vehicle body, and a second force transmission structure at a bottom area of a B pillar of the vehicle body; the first force transmission structure and the second force transmission structure each have a plurality of cavity structures arranged in connection; wherein, the plurality of cavity structures in the first force transmission structure and the second force transmission structure are arranged in a stack from outside to inside; a bottom of the first force transmission structure and / or the second force transmission structure is arranged in a gradually rising trend in a direction from outside to inside; the first force transmission structure further has an energy absorption space (15); the energy absorption space (15) is formed above the outermost cavity structure in the first force transmission structure and outside the next outer cavity structure in the first force transmission structure; the first force transmission structure comprises a side wall rocker beam (401), a floor rocker beam (402), a front apron beam (203), a front floor longitudinal beam (202), a front floor (2), and a first connecting plate (5) for connecting the floor rocker beam (402) and the front floor longitudinal beam (202); the plurality of cavity structures in the first force transmission structure comprise: a first cavity structure (10) formed between the side wall rocker beam (401) and the floor rocker beam (402); a second cavity structure (11) formed between the floor rocker beam (402), the first connecting plate (5), the front floor longitudinal beam (202), the front floor (2), and the front apron beam (203); and the energy absorption space (15) is formed above the first cavity structure (10) and outside the second cavity structure (11). 2.The force transmission structure for a side impact of a vehicle body according to claim 1, characterized in that: the first force transmission structure further comprises a front floor cross beam (204); the plurality of cavity structures in the first force transmission structure further comprise: a third cavity structure (12) formed between the front floor longitudinal beam (202) and the front floor (2); and a fourth cavity structure (13) formed between the front floor (2), the front floor longitudinal beam (202), and the front floor cross beam (204). 3.The force transmission structure for a side impact of a vehicle body according to claim 1, characterized in that: the front floor longitudinal beam (202) is located below the front floor (2); a front floor upper longitudinal beam (201) corresponding to the front floor longitudinal beam (202) is arranged above the front floor (2); and the plurality of cavity structures in the first force transmission structure further comprise: a fifth cavity structure (14) formed between the front floor upper longitudinal beam (201) and the front floor (2). 4.The force transmission structure for a side impact of a vehicle body according to claim 1, characterized in that: the door opening of the vehicle body is a front door opening (100) of the vehicle body. 5.The force transmission structure for a side impact of a vehicle body according to any one of claims 1 to 3, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The second force transmission structure comprises the side wall rocker beam (401), the floor rocker beam (402), the front floor (2), the front floor longitudinal beam (202), and a second connecting plate (6) for connecting the floor rocker beam (402) and the front floor longitudinal beam (202); The plurality of cavity structures in the second force transmission structure comprises: A sixth cavity structure (21) formed between the side wall rocker beam (401) and the floor rocker beam (402); A seventh cavity structure (22) formed between the floor rocker beam (402), the front floor (2), the front floor longitudinal beam (202), and the second connecting plate (6).

6. The force transmission structure for side impact of a vehicle body according to claim 5, wherein: The plurality of cavity structures in the second force transmission structure further comprises: An eighth cavity structure formed between the front floor longitudinal beam (202) and the front floor (2); The seventh cavity structure (22) and the eighth cavity structure are arranged in sequence inside the sixth cavity structure (21).

7. The force transmission structure for side impact of a vehicle body according to claim 6, wherein: The front floor longitudinal beam (202) is provided with a front floor longitudinal beam reinforcing plate (206); The front floor longitudinal beam reinforcing plate (206) divides the eighth cavity structure into an upper cavity (24) and a lower cavity (23).

8. The force transmission structure for side impact of a vehicle body according to claim 6, wherein: The vehicle body B pillar comprises a B pillar inner plate (3) and a B pillar reinforcing plate (301); A ninth cavity structure (20) is formed between the B pillar inner plate (3), the B pillar reinforcing plate (301), and the side wall rocker beam (401); The ninth cavity structure (20) is located above the sixth cavity structure (21).

9. The force transmission structure for side impact of a vehicle body according to claim 8, wherein: An outer side of the side wall rocker beam (401) is provided with a side wall outer plate (1); The B pillar reinforcing plate (301) is located between the side wall rocker beam (401) and the side wall outer plate (1); An inner side of the side wall rocker beam (401) is provided with a side wall rocker beam reinforcing plate (403); One side of the floor rocker beam (402) is provided with a floor rocker beam reinforcing plate (404).

10. The force transmission structure for side impact of a vehicle body according to claim 8, wherein: A convex portion (406) is formed on the side wall rocker beam (401) corresponding to the vehicle body B pillar; The convex portion (406) is connected with the B pillar inner plate (3); and Profiles on both sides of the convex portion (406) are height-gradually-changing arcs.

11. The force transmission structure for side impact of a vehicle body according to claim 5, wherein: The second force transmission structure further comprises a front floor lower cross beam (205) arranged inside the front floor longitudinal beam (202) and located below the front floor (2); The plurality of cavity structures in the second force transmission structure further comprises: A tenth cavity structure (25) is formed between the front floor under cross beam (205), the front floor (2) and the front floor longitudinal beam (202).

12. The force transfer structure of side impact of the vehicle body according to claim 11, characterized in that: The second force transfer structure further comprises a front floor upper cross beam (207) arranged on the upper side of the front floor (2); The plurality of cavity structures in the second force transfer structure further comprise: An eleventh cavity structure (26) is formed between the front floor upper cross beam (207) and the front floor (2).

13. An automobile characterized by comprising: The vehicle body has the force transfer structure of side impact of the vehicle body according to any one of claims 1 to 12.

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