Trunk side longitudinal beam, side guide rail device and vehicle

Abstract

The utility model relates to the technical field of automobile trunks, in particular to a trunk side longitudinal beam, a side guide rail device and a vehicle, the trunk side longitudinal beam comprises a longitudinal beam body, one side of the longitudinal beam body is used for being connected with the side wall of a vehicle body, and the other side of the longitudinal beam body is provided with a first step surface and a second step surface. The first step face is arranged in the length direction of the longitudinal beam body and used for installing a side guide rail assembly. The second step surface is arranged below the first step surface and is used for installing a side decoration plate and a carpet which extend to the second step surface, and the longitudinal beam body is configured in the mode that when the longitudinal beam body is installed in a trunk, at least one of the first step surface and the second step surface can be installed with a corresponding structure in a matched mode; according to the utility model, through the arrangement of the first step surface and the second step surface, reuse on at least two vehicle types is realized, the production cost and the design difficulty are reduced, and the standardization and modularization level in the production process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile trunks, and particularly relates to a side longitudinal beam of a trunk, a side guide rail device and a vehicle. Background Art

[0002] In an automobile trunk, due to the installation requirements of side trim panels, carpets, etc. inside the trunk, side longitudinal beams need to be arranged in the length direction on both sides of the trunk to provide installation points for the side trim panels and carpets.

[0003] However, the side longitudinal beams in the prior art are all designed for specific vehicle models and cannot be reused in multiple vehicle models. This not only increases the production cost and design difficulty, but also leads to the need to develop and manufacture different specifications of side longitudinal beams for different vehicle models during the production process, increasing the complexity of inventory management and unable to meet the requirements of the automotive industry for standardization and modularization. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a side longitudinal beam of a trunk, a side guide rail device and a vehicle. The side longitudinal beam of the trunk realizes reuse in at least two vehicle models, reduces the subsequent production cost and design difficulty, and improves the level of standardization and modularization during the production process.

[0005] To achieve the above purpose and other related purposes, the present utility model provides a side longitudinal beam of a trunk, including a longitudinal beam body for connecting with the vehicle body side wall on one side, and the other side of the longitudinal beam body is provided with:

[0006] A first step surface, arranged along the length direction of the longitudinal beam body and used for installing a side guide rail assembly;

[0007] A second step surface, arranged non-coplanar with the first step surface and used for installing a side trim panel and a carpet extending thereto;

[0008] The longitudinal beam body is configured such that when it is installed in the trunk, at least one of the first step surface or the second step surface can be matched and installed with the corresponding structure.

[0009] In an embodiment of the present utility model, a plurality of support legs are arranged at the lower part of the longitudinal beam body, and a first connection point for connecting with the rear floor along a first direction is arranged on the support legs;

[0010] A second connection point for connecting with the vehicle body side wall along a second direction is arranged on the side surface of the longitudinal beam body;

[0011] A third connection point for connecting with the rear sill along a third direction is arranged at one end of the longitudinal beam body;

[0012] Wherein, the first direction, the second direction, and the third direction are all different directions.

[0013] In an embodiment of the present utility model, one end of the longitudinal beam body in the extending direction of the first step surface is provided with an avoidance notch, and the avoidance notch is arranged on the same side as the first step surface.

[0014] In an embodiment of the present utility model, on the side wall structure of the longitudinal beam body at the position of the avoidance notch, a concave structure for installing the shaft curtain is provided;

[0015] And one of the second connection points is concentrically arranged with the concave structure.

[0016] In an embodiment of the present utility model, the avoidance notch includes a sub-bottom wall and a sub-side wall perpendicular to the sub-bottom wall;

[0017] A positioning installation surface is provided on the sub-bottom wall, and the positioning installation surface is used for positioning and installing a support member of the support side rail assembly.

[0018] In an embodiment of the present utility model, the longitudinal beam body is a plastic part, and a strengthening structure and / or a weight-reducing hole are / is provided on the longitudinal beam body of the plastic part.

[0019] In an embodiment of the present utility model, one end of the longitudinal beam body is provided with an extending support leg;

[0020] On the upper part of the extending support leg, a first installation point and / or a first positioning point for positioning and connecting with the front cross beam are / is provided; the lower part of the extending support leg is configured to be able to extend into a limit hole provided on the front cross beam for connecting with the rear floor.

[0021] In an embodiment of the present utility model, the longitudinal beam body is arranged along the vehicle body length direction, and two are arranged in parallel at intervals in the vehicle body width direction;

[0022] One ends of the two parallel longitudinal beam bodies are both connected to the front cross beam, the other ends are both connected to the rear sill, and the two longitudinal beam bodies are also connected by a rear cross beam, and the rear cross beam is located between the front cross beam and the rear sill.

[0023] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a side rail device, including the rear trunk side longitudinal beam as described above, and a side rail assembly installed on the first step surface of the rear trunk side longitudinal beam.

[0024] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a vehicle, including the rear trunk side longitudinal beam or the side rail device as described above.

[0025] In summary, the utility model has the following beneficial effects: The trunk side longitudinal beam provided by the utility model realizes reuse on at least two vehicle models through the arranged first step surface and second step surface, solves the problem that the traditional side longitudinal beam cannot be reused in multiple vehicle models, reduces the production cost and design difficulty, improves the level of standardization and modularization in the production process, and simplifies the inventory management. This not only helps to improve the production efficiency but also meets the requirements of the automotive industry for standardization and modularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 Schematic diagram of the overall structure of the trunk side longitudinal beam in an embodiment of the present utility model;

[0028] Figure 2 For Figure 1 Top view of the trunk side longitudinal beam;

[0029] Figure 3 For Figure 1 Schematic diagram of the bottom structure of the trunk side longitudinal beam;

[0030] Figure 4 Schematic diagram of the installation of the side guide rail assembly on the longitudinal beam body in an embodiment of the present utility model;

[0031] Figure 5 Schematic diagram of the connection between the longitudinal beam body and the side guide rail assembly through a support member in an embodiment of the present utility model;

[0032] Figure 6 Schematic diagram of the internal structure of the automobile trunk in an embodiment of the present utility model;

[0033] Figure 7 For Figure 6 Structural cross-sectional view at A-A in [reference], where the trunk is a vehicle model equipped with a side guide rail assembly;

[0034] Figure 8 For Figure 7 Enlarged view of the partial structure;

[0035] Figure 9 For Figure 6 Structural cross-sectional view at A-A in [reference], where the trunk is a vehicle model not equipped with a side guide rail assembly;

[0036] Figure 10 is Figure 9 a partial structural enlarged view of

[0037] Component label description: Longitudinal beam body 10, first stepped surface 1, supporting surface 11, second stepped surface 2, limiting structure 21, supporting leg 3, first connection point 31, side wall structure 4, second connection point 41, third connection point 42, concave structure 43, limiting connection part 44, avoidance notch 5, sub-bottom wall 51, positioning and mounting surface 511, strengthening structure 6, weight reduction hole 7, extending support leg 8, first mounting point 81, first positioning point 82, side trim panel 20, carpet 30, side guide rail assembly 40, support member 50, front cross beam 60, rear cross beam 70, cover plate 80. Specific embodiments

[0038] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present utility model are for describing specific specific implementation manners, rather than for limiting the protection scope of the present utility model. The test methods without specific conditions noted in the following embodiments are usually in accordance with conventional conditions or in accordance with the conditions recommended by each manufacturer.

[0039] Please refer to Figures 1 to 10 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration, rather than for limiting the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present utility model can be implemented.

[0040] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in the present utility model, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present utility model, based on the understanding of those skilled in the art of this technical field of the prior art and the description of the present utility model, any method, device, and material of the prior art similar to or equivalent to the methods, devices, and materials described in the embodiments of the present utility model can also be used to implement the present utility model.

[0041] As Figure 5 shown, the X direction is the vehicle body length direction, the Y direction is the vehicle body width direction, and the Z direction is the vehicle body height direction.

[0042] Please refer to Figures 1 - 3 Figs. 6 - 10, the present utility model provides a rear trunk side longitudinal beam, including a longitudinal beam body 10 on one side for connecting with the vehicle body side panel, and a first step surface 1 and a second step surface 2 are provided on the other side of the longitudinal beam body 10;

[0043] Among the two sides of the longitudinal beam body 10 along the length direction of the longitudinal beam body 10, one side is the first side and the other side is the second side. The first side is for connecting with the vehicle body side panel, and the first step surface 1 and the second step surface 2 are located on the second side of the longitudinal beam body 10. Among them, these two sides are not the two ends of the longitudinal beam body 10 in the length direction, and the rear trunk side longitudinal beam is arranged in the rear trunk along the vehicle body length direction.

[0044] Further, the first step surface 1 is arranged along the length direction of the longitudinal beam body 10 and is used for installing a side guide rail assembly 40 arranged along the vehicle body length direction. It should be understood that positioning points and / or limiting points and / or connecting points for limiting connection with the side guide rail assembly 40 are provided on the first step surface 1. The side guide rail assembly 40 can be an installation rail or a sliding rail.

[0045] The second step surface 2 is not coplanar with the first step surface 1. Generally, the second step surface 2 is arranged below one side of the first step surface 1, that is, below in the vehicle body height direction. The second step surface 2 is used for installing a side trim panel 20 and a carpet 30 extending thereto. Generally, the second step surface 2 can be arranged parallel to the first step surface 1; it should be understood that positioning points and / or limiting points and / or connecting points for limiting connection with the side trim panel 20 and the carpet 30 are provided on the second step surface 2, for example Figure 2The limiting structure 21 therein is used to limit the side trim panel 20; it should be noted that both the first step surface 1 and the second step surface 2 provide a standardized installation platform, which can adapt to different vehicle models. For example, the first step surface 1 can adapt to vehicle models with side rail assemblies 40 in the trunk, and the second step surface 2 can provide a stable and unified installation base point for the side trim panel 20 and the carpet 30 in vehicle models without side rail assemblies 40, thus simplifying the production and installation processes, reducing the complexity and cost of multi-vehicle model development, and being easy to maintain and replace.

[0046] Furthermore, the longitudinal beam body 10 is configured such that when it is installed in the trunk, at least one of the first step surface 1 and the second step surface 2 can be matched and installed with the corresponding structure. It should be understood that after the trunk side longitudinal beam is installed in the vehicle, at least one of the first step surface 1 and the second step surface 2 will be used, or a side rail assembly 40 arranged along the vehicle body length direction is installed on the first step surface 1, or the side trim panel 20 and the carpet 30 extending thereto are installed on the second step surface 2, thereby ensuring the versatility of the longitudinal beam body 10 in different vehicle models, enabling it to be matched and installed with various body structures as needed, and greatly improving the production efficiency and the standardization level of parts.

[0047] Please refer to Figure 5 , as an optional embodiment of this case, a plurality of support legs 3 are provided at the lower part of the longitudinal beam body 10, and a first connection point 31 is provided on the support legs 3. The first connection point 31 is used to connect with the rear floor along the first direction, which can effectively disperse the pressure borne by the longitudinal beam body 10 in the vertical direction, and improve the load-bearing capacity and stability of the longitudinal beam body 10;

[0048] Furthermore, a second connection point 41 is provided on the side surface of the longitudinal beam body 10. The second connection point 41 is used to connect with the vehicle body side wall along the second direction, which can provide lateral support, enhance the stability of the vehicle when subjected to lateral forces, contribute to improving the overall rigidity of the vehicle when turning or suffering a side impact, and reduce the possibility of deformation and damage;

[0049] Furthermore, a third connection point 42 is provided at one end of the longitudinal beam body 10 close to the rear sill. The third connection point 42 is used to connect with the rear sill along the third direction, which can effectively enhance the connection strength between the longitudinal beam and the rear part of the vehicle body, and further ensure the structural stability of the longitudinal beam body 10;

[0050] Among them, the first direction, the second direction, and the third direction are all different directions. Generally, there are multiple first connection points 31, second connection points 41, and third connection points 42 to ensure the stability and structural integrity of the longitudinal beam body 10 in all directions, effectively solving the problems of insufficient support, loose connection, and weak impact resistance in traditional designs.

[0051] Please refer to Figure 5 , as an optional embodiment of this case, the first direction, the second direction, and the third direction are perpendicular to each other. Among them, the first direction is the Z-direction, the second direction is the Y-direction, and the third direction is the X-direction to ensure the stability of the longitudinal beam body 10 in all directions. Through this vertical direction design, external forces can be effectively dispersed and borne in different directions, improving the overall rigidity and safety of the longitudinal beam body 10.

[0052] Please refer to Figures 1 - 3 , as an optional embodiment of this case, an avoidance notch 5 is provided at one end of the longitudinal beam body 10 in the extending direction of the first step surface 1, and the avoidance notch 5 is arranged on the same side as the first step surface 1.

[0053] The direction of the avoidance notch 5 facing the first side is open, used to avoid other structures on the vehicle, so as to achieve universality for multiple vehicle models; for example, to avoid structures such as speakers in the trunk. By setting the avoidance notch 5, it can be ensured that the longitudinal beam body 10 will not interfere with these components during installation, ensuring the convenience and reliability of installation, and at the same time enhancing the adaptability and flexibility of the side longitudinal beam.

[0054] Please refer to Figures 1 - 3 , as an optional embodiment of this case, on the side wall structure 4 of the longitudinal beam body 10 located at the avoidance notch 5, a concave structure 43 for installing an axle curtain is provided; and one of the second connection points 41 is concentrically arranged with the concave structure 43.

[0055] It should be noted that, on the one hand, the concave structure 43 provides a stable structural foundation, which is beneficial to strengthening the structure of the second connection point 41 concentrically arranged with the concave structure 43. At the same time, when the axle of the axle curtain is installed at the concave structure 43, the axle curtain can cover the second connection point 41, having a certain function of covering up defects. Therefore, the concave structure 43 has multiple functions.

[0056] Please refer to Figures 1 - 3 , as an optional embodiment of this case, the avoidance notch 5 includes a sub-bottom wall 51 and a sub-side wall perpendicular to the sub-bottom wall 51, and the above-mentioned concave structure 43 is arranged on the sub-side wall.

[0057] A positioning and mounting surface 511 is provided on the sub-bottom wall 51, and the positioning and mounting surface 511 is used to position and mount the support member 50 of the support side guide rail assembly 40; connection points and positioning points connected to the support member 50 can be provided on the positioning and mounting surface 511, so as to facilitate the support member 50 to support the bottom surface of the side guide rail assembly 40 at an accurate position.

[0058] Please refer to Figures 1 - 3 , as an optional embodiment of this case, a support surface 11 is further provided above the first step surface 1 of the longitudinal beam body 10. The support surface 11 is configured such that when the longitudinal beam body 10 is installed in the trunk, the support surface 11 can support the side trim 20, thereby providing more installation support for the installation of the side trim 20.

[0059] Please refer to Figures 1 - 3 , as an optional embodiment of this case, the longitudinal beam body 10 is a plastic part.

[0060] It should be noted that, for example, synthetic plastic materials or non-synthetic plastic materials are used, and specifically, plastic materials such as polypropylene and polyethylene can be used; the plastic material is lighter in weight than the sheet metal material, and the plastic part is in an injection molding form, with stronger plasticity than the stamping form and no problems such as cracking; under the condition of meeting the layout and installation, there are more possibilities when making the strengthening structure 6 for the plastic part; for example, the support leg 3 in the shape of a square box is screwed to the rear floor along the vehicle body height direction. The support leg 3 has a thick structure design and a large contact area with the vehicle body when screwed, and the increased contact area can decompose the force on the support leg 3, so that more load is transmitted to the vehicle body rear floor, reducing the local force on the support leg 3; combined with the design requirements of the longitudinal beam body 10 itself and the characteristics of plastic molding, there are many bosses and ribs on the structure of the longitudinal beam body 10 to increase the stiffness of the longitudinal beam body 10, and weight reduction holes 7 are opened in the area where the longitudinal beam body 10 is not stressed as much as possible to reduce the weight of the longitudinal beam body 10.

[0061] Please refer to Figures 1 - 3 , as an optional embodiment of this case, a strengthening structure 6 and / or a weight reduction hole 7 is provided on the longitudinal beam body 10. It should be understood that whether the longitudinal beam body 10 is a plastic structure or not, a strengthening structure 6 and / or a weight reduction hole 7 can be provided on the longitudinal beam body 10.

[0062] The strengthening structure 6 can be a structure such as a reinforcing rib, a reinforcing plate or a reinforcing step. These strengthening structures 6 can enhance the rigidity and strength of the longitudinal beam body 10 to ensure that the longitudinal beam body 10 can provide sufficient supporting force and anti-deformation ability, especially when the longitudinal beam body 10 is a plastic part, this is particularly important.

[0063] A weight-reducing hole 7 is formed in the longitudinal beam body 10, which can minimize the weight of the longitudinal beam as much as possible on the premise of ensuring strength, helping to reduce the weight of the whole vehicle, thereby improving the economy and handling performance of the vehicle. The weight-reducing hole 7 can be arranged in the non-loaded area of the longitudinal beam body 10, for example, it can be arranged on the sub-bottom wall 51 of the above-mentioned avoidance notch 5.

[0064] At least part of the reinforcing structure 6 is arranged along the length direction of the longitudinal beam body 10, and at least part of the reinforcing structure 6 is arranged along the width direction of the longitudinal beam body 10. This width direction is perpendicular to the length direction, and this width direction is also the direction that is the same as the vehicle body width direction after the longitudinal beam body 10 is installed in the trunk, so as to comprehensively improve the structural strength of the longitudinal beam body 10.

[0065] Please refer to Figures 1 - 3 , as an optional embodiment of this case, an extension support leg 8 is arranged at one end of the longitudinal beam body 10; a first mounting point 81 and / or a first positioning point 82 for positioning and connecting with the front cross beam 60 are arranged on the upper part of the extension support leg 8; the lower part of the extension support leg 8 is configured to be able to extend into the limit hole arranged on the front cross beam 60 for connecting with the rear floor.

[0066] It should be noted that the extension support leg 8 is arranged at one end of the longitudinal beam body 10 close to the front cross beam 60 on the rear floor, and a first mounting point 81 and / or a first positioning point 82 for positioning and connecting with the front cross beam 60 are arranged on the upper part of the extension support leg 8, so as to realize the precise positioning connection with the front cross beam 60. Since the front cross beam 60 is usually set as a plastic part with slightly weaker support, therefore, in this case, by enabling the lower part of the extension support leg 8 to extend into the limit hole arranged on the front cross beam 60 and directly connect with the rear floor, the rear floor has better strength and stiffness, thus providing strong support for the connection part of the longitudinal beam body 10 and the front cross beam 60, and solving the problem of insufficient support of the longitudinal beam body 10 in the vertical or height direction of the vehicle body.

[0067] Please refer to Figure 1 and 5 , as an optional embodiment of this case, a limit connection part 44 for connecting and limiting with the rear cross beam 70 is arranged in the middle of the longitudinal beam body 10, so as to facilitate the connection and fixation with the rear cross beam 70.

[0068] Please refer to Figure 5 , as an optional embodiment of this case, the longitudinal beam body 10 is arranged along the vehicle body length direction, and two are arranged in parallel at intervals in the vehicle body width direction;

[0069] One end of each of the two longitudinal beam bodies 10 arranged in parallel is connected to the front cross beam 60, and the other end is connected to the rear sill. The two longitudinal beam bodies 10 are also connected by a rear cross beam 70, and the rear cross beam 70 is located between the front cross beam 60 and the rear sill.

[0070] It should be noted that the longitudinal beam body 10 is arranged along the length direction of the vehicle body, that is, parallel to the front and rear directions of the vehicle; the two longitudinal beam bodies 10 are connected by the front cross beam 60, the rear cross beam 70 and the rear sill, so as to form a frame structure. Generally, the front cross beam 60, the rear cross beam 70 and the rear sill are arranged along the width direction of the vehicle, perpendicular to the arrangement direction of the longitudinal beam body 10; the two longitudinal beam bodies 10 can be positioned with the front cross beam 60 at the same time, which can improve the positioning accuracy; among them, the rear sill is an important support structure at the rear of the vehicle, and the connection between the rear sill and the longitudinal beam body 10 ensures the strength and stability of the rear of the vehicle body, and also strengthens the structural stability of the longitudinal beam body 10 itself; therefore, the two longitudinal beam bodies 10 are connected by the front cross beam 60, the rear cross beam 70 and the rear sill to form a frame structure, and the overall stability is enhanced, which is beneficial to providing a stable structural basis for the installation of the side guide rail assembly 40; especially, both ends and the middle of the longitudinal beam body 10 are limited, and the structural stability of the vehicle in case of sudden stop, sharp turn, etc. is greatly improved.

[0071] Please refer to Figures 6 - 10 , the present utility model provides a side guide rail device, including the rear trunk side longitudinal beam described above, and a side guide rail assembly 40 installed on the first step surface 1 of the rear trunk side longitudinal beam, so that the side guide rail device with the rear trunk side longitudinal beam is also within the protection scope of this case.

[0072] The present utility model provides a vehicle, including the rear trunk side longitudinal beam or the side guide rail device described above, so that the vehicle with the rear trunk side longitudinal beam or the side guide rail device is also within the protection scope of this case.

[0073] In summary, the present utility model effectively overcomes some practical problems in the prior art, so it has high utilization value and practical significance.

[0074] The above embodiments are only used to illustrate the principle and its effects of the present utility model, rather than to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A side longitudinal beam of a trunk, characterized in that, It includes a longitudinal beam body with one side for connecting to the vehicle body side panel, and the other side of the longitudinal beam body is provided with: A first stepped surface, which is arranged along the length direction of the longitudinal beam body and is used for installing a side guide rail assembly; A second stepped surface, which is arranged non-coplanarly with the first stepped surface and is used for installing a side trim panel and a carpet extending thereto; The longitudinal beam body is configured such that when it is installed in the trunk, at least one of the first stepped surface or the second stepped surface can be matched and installed with the corresponding structure.

2. The side longitudinal beam of the trunk according to claim 1, characterized in that, A plurality of support legs are arranged at the lower part of the longitudinal beam body, and a first connection point for connecting to the rear floor along a first direction is arranged on the support legs; A second connection point for connecting to the vehicle body side panel along a second direction is arranged on the side surface of the longitudinal beam body; A third connection point for connecting to the rear sill along a third direction is arranged at one end of the longitudinal beam body; Wherein, the first direction, the second direction and the third direction are all different directions.

3. The side longitudinal beam of the trunk according to claim 2, wherein, An avoidance notch is arranged at one end of the longitudinal beam body in the extending direction of the first stepped surface, and the avoidance notch is arranged on the same side as the first stepped surface.

4. The side longitudinal beam of the trunk according to claim 3, wherein On the side wall structure of the longitudinal beam body at the position of the avoidance notch, a concave structure for installing an axle curtain is arranged; And one of the second connection points is concentrically arranged with the concave structure.

5. The side longitudinal beam of the trunk according to claim 3, characterized in that The avoidance notch includes a sub-bottom wall and a sub-side wall perpendicular to the sub-bottom wall; A positioning installation surface is arranged on the sub-bottom wall, and the positioning installation surface is used for positioning and installing a support member for supporting the side guide rail assembly.

6. The side longitudinal beam of the trunk according to claim 1, characterized in that, The longitudinal beam body is a plastic part, and a strengthening structure and / or a weight-reducing hole are arranged on the plastic longitudinal beam body.

7. The side longitudinal beam of the trunk according to claim 1, wherein An extending support leg is arranged at one end of the longitudinal beam body; A first installation point and / or a first positioning point for positioning and connecting to the front cross beam are arranged at the upper part of the extending support leg; the lower part of the extending support leg is configured to be able to extend into a limiting hole arranged on the front cross beam for connecting to the rear floor.

8. The side longitudinal beam of the trunk according to claim 1, characterized in that, The longitudinal beam body is arranged along the vehicle body length direction, and two are arranged in parallel at intervals in the vehicle body width direction; One ends of the two longitudinally arranged longitudinal beam bodies are both connected to the front cross beam, and the other ends are both connected to the rear sill. The two longitudinal beam bodies are also connected by a rear cross beam, and the rear cross beam is located between the front cross beam and the rear sill.

9. A side guide device, characterized in that, It includes the trunk side longitudinal beam according to any one of claims 1-8, and a side guide rail assembly installed on the first stepped surface of the trunk side longitudinal beam.

10. A vehicle, characterized in that, It includes the trunk side longitudinal beam according to any one of claims 1-8 or the side guide rail device according to claim 9.

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