Underbody, chassis and vehicle

Abstract

A lower vehicle body, a chassis and a vehicle, wherein the lower vehicle body (1) comprises an energy bin (10), a side beam (20) and a longitudinal beam (30), the energy bin comprises a bin body (11) and a top cover plate (12), the top cover plate being arranged at one end of the bin body along a first direction, the energy bin being provided with a side beam on at least one side in a second direction, the side beam being connected to the top cover plate. The side beam is connected to a longitudinal beam on at least one side in a third direction. The first direction, the second direction and the third direction intersect, and the side beam and the longitudinal beam are located on the side of the top cover plate that is away from the bin body in the first direction. The lower vehicle body has high reliability when subjected to a collision.

Description

Lower body, chassis and vehicle Technical Field

[0001] The present application relates to the field of vehicles, and in particular to an undercarriage, a chassis and a vehicle. Background Art

[0002] With the rapid development of automation and intelligence, new energy vehicles are becoming more and more popular and popular among the public. How to improve the reliability of the vehicle's lower body when a vehicle is hit by a collision is a research direction in vehicle technology.

[0003] Summary of the Invention

[0004] In view of the above problems, the present application provides an undercarriage, a chassis and a vehicle, wherein the undercarriage has high reliability when subjected to a collision.

[0005] In a first aspect, embodiments of the present application provide an undercarriage comprising an energy storage tank, side beams, and longitudinal beams. The energy storage tank comprises a tank body and a roof panel, the roof panel being disposed at one end of the tank body along a first direction. The energy storage tank is provided with side beams on at least one side in a second direction, the side beams being connected to the roof panel. The side beams are connected to the longitudinal beams on at least one side in a third direction. The first, second, and third directions intersect, and the side beams and longitudinal beams are located on a side of the roof panel facing away from the tank body in the first direction.

[0006] The lower vehicle body provided in the embodiment of the present application includes an energy bin, side beams and longitudinal beams. The bin body of the energy bin is used to place batteries, and the top cover plate can encapsulate the batteries in the bin body to ensure the installation of the batteries. By arranging side beams on at least one side of the battery in the second direction, and the side beams are connected to the longitudinal beams on at least one side of the third direction, the functional requirements of the lower vehicle body can be guaranteed. In addition, the first direction, the second direction and the third direction intersect, and the side beams and the longitudinal beams are located on the side of the top cover plate that is away from the bin body in the first direction, so that along the third direction, the positive projections of the side beams and the longitudinal beams do not overlap with the energy bin. When the vehicle used by the lower vehicle body collides, the collision force transmitted by the longitudinal beams can be transmitted through the overlapping parts of the side beams and the edges of the energy bin, reducing the increase in the contact area between the longitudinal beams and the side beams and the energy bin due to collision deformation, thereby reducing the amount of intrusion into the energy bin due to collision and the risk of damage to the batteries installed in the energy bin, thereby improving the reliability of the lower vehicle body.

[0007] In some embodiments, in at least one of the second direction and the third direction, an orthographic projection of the longitudinal beam and an orthographic projection of the roof panel have no overlapping area.

[0008] Through the above-mentioned arrangement, the longitudinal beam can be set away from the energy bin, which is beneficial to reducing the contact area between the longitudinal beam and the side beam and the energy bin due to collision deformation, thereby reducing the amount of intrusion into the energy bin due to vehicle collision and the risk of damage to the battery installed in the energy bin, thereby improving the reliability of the lower vehicle body.

[0009] In some embodiments, the longitudinal beam has a slot, and the side beam partially extends into the slot and is detachably connected to the longitudinal beam.

[0010] The lower vehicle body provided in the embodiment of the present application is advantageous in arranging a slot on the longitudinal beam to facilitate the positioning connection between the longitudinal beam and the side beam. The slot can limit the side beam to ensure the reliability of the connection between the longitudinal beam and the side beam.

[0011] In some embodiments, the card slot is open along a first direction toward one side of the top cover plate, and the card slot is open along a second direction away from one side of the top cover plate.

[0012] The lower vehicle body provided in the embodiment of the present application has the retaining slots open in a first direction toward one side of the roof panel and in a second direction away from the roof panel. This ensures that the longitudinal beam can be directly engaged with the side beam in both the first and second directions when mating with the side beam, facilitating assembly. Furthermore, the walls of the retaining slots in the first and second directions can limit the side beam, ensuring the secure connection between the longitudinal beam and the side beam.

[0013] In some embodiments, the side beam is at least partially stacked and detachably connected to the longitudinal beam on a side facing away from the roof cover plate in the first direction.

[0014] The lower vehicle body provided in the embodiments of the present application facilitates positioning and assembly of the side beams and the longitudinal beams in the first direction by at least partially overlapping the side beams on the side facing away from the roof panel in the first direction. Furthermore, by providing a detachable connection between the side beams and the longitudinal beams in the first direction, assembly and disassembly of the side beams and the longitudinal beams is facilitated, while also reducing the lower vehicle body's reliance on the vehicle body shop and improving maintainability.

[0015] In some embodiments, the lower vehicle body further includes a first fastener, which is inserted into the longitudinal beam and the side beam along a first direction and is detachably connected to at least one of the side beam and the longitudinal beam.

[0016] The lower vehicle body provided in the embodiment of the present application includes a first fastener, and the first fastener is inserted into the longitudinal beam and the side beam along the first direction and is detachably connected to at least one of the side beam and the longitudinal beam. This can ensure the connection strength between the side beam and the longitudinal beam, and can ensure the convenience of disassembly and assembly between the side beam and the longitudinal beam.

[0017] In some embodiments, the side beam is at least partially stacked and detachably connected to the longitudinal beam on a side facing the roof cover plate in the second direction.

[0018] In the lower body provided by the embodiment of the present application, the side beam is at least partially stacked with the longitudinal beam on the side facing the roof panel in the second direction, which facilitates positioning and assembly of the side beam and the longitudinal beam in the second direction. Furthermore, by making the side beam and the longitudinal beam detachable in the second direction, assembly and disassembly of the side beam and the longitudinal beam is also facilitated, while reducing the lower body's reliance on the body shop and improving maintainability.

[0019] In some embodiments, the lower vehicle body further includes a second fastener, which is inserted into the longitudinal beam and the side beam along the second direction and is detachably connected to at least one of the side beam and the longitudinal beam.

[0020] The lower vehicle body provided in the embodiment of the present application includes a second fastener, and the second fastener is inserted into the longitudinal beam and the side beam along the second direction and is detachably connected to at least one of the side beam and the longitudinal beam. This can ensure the connection strength between the side beam and the longitudinal beam, and can ensure the convenience of disassembly and assembly between the side beam and the longitudinal beam in the second direction.

[0021] In some embodiments, there are multiple second fasteners, and the multiple second fasteners are spaced apart along a fold line track along the third direction.

[0022] The lower vehicle body provided in the embodiment of the present application, through the above-mentioned arrangement, improves the connection efficiency between the longitudinal beam and the side beam while improving the stability of the joint between the side beam and the longitudinal beam, thereby ensuring the reliability of the lower vehicle body.

[0023] In some embodiments, the plurality of second fasteners are arranged in two groups, each group including at least two second fasteners, the two groups of second fasteners are spaced apart in the first direction and alternately arranged in the third direction, and the second fasteners in the same group are spaced apart along a straight line in the third direction.

[0024] The lower vehicle body provided in the embodiment of the present application facilitates the multi-point distribution of the second fasteners along the broken line trajectory by grouping multiple second fasteners and adopting the above-mentioned distribution method, thereby improving the connection efficiency between the longitudinal beam and the side beam while ensuring the stability of the joint between the side beam and the longitudinal beam.

[0025] In some embodiments, the longitudinal beam includes a top wall, a bottom wall and a middle partition located between the top wall and the bottom wall along the first direction, and reinforcing ribs are respectively connected between the top wall and the middle partition and between the bottom wall and the middle partition.

[0026] The lower vehicle body provided in the embodiment of the present application has a longitudinal beam adopting the above-mentioned structural form, which can improve its own rigidity, so that when the lower vehicle body is used in a vehicle, it can provide effective assistance to the bending rigidity of the entire vehicle.

[0027] In some embodiments, along the third direction, the reinforcing ribs between the top wall and the middle partition plate and the reinforcing ribs between the bottom wall and the middle partition plate are alternately arranged.

[0028] Through the above arrangement, the center partition can support the reinforcement ribs at multiple points to ensure the uniformity of the stiffness of the longitudinal beam at all locations.

[0029] In some embodiments, the longitudinal beam has a side wall along the third direction disposed toward the edge beam, the side wall is connected between the top wall and the bottom wall, and the middle partition extends to the side wall along the third direction and is connected to the side wall.

[0030] The lower vehicle body provided in the embodiment of the present application ensures that the center partition extends to a large extent in the third direction by extending the center partition along the third direction to the side wall and connecting to the side wall. When the vehicle to which the lower vehicle body is applied collides and generates a collision force, the collision force can be transmitted through the center partition extending along the third direction, thereby ensuring the continuity of the force transmission path, reducing the amount of intrusion into the energy bin due to vehicle collision and the risk of damage to the battery installed in the energy bin, and improving the reliability of the lower vehicle body.

[0031] In a second aspect, an embodiment of the present application provides a chassis, comprising the lower vehicle body provided in the above embodiments and a battery, wherein the battery is arranged in an energy compartment.

[0032] In a third aspect, an embodiment of the present application provides a vehicle, comprising the chassis and an upper body provided in the above embodiment, wherein the upper body is arranged on the chassis and connected to the lower body. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0034] FIG1 is a schematic diagram of a partial structure of a lower vehicle body provided in some embodiments of the present application;

[0035] FIG2 is a partial enlarged view of point A in FIG1 ;

[0036] FIG3 is a side view of a lower vehicle body provided by some embodiments of the present application;

[0037] FIG4 is a partial enlarged view of point B in FIG3 ;

[0038] FIG5 is a schematic diagram of a partial cross-sectional structure along the CC direction in FIG4 ;

[0039] FIG6 is a schematic diagram of a partial structure of a lower vehicle body provided in other embodiments of the present application;

[0040] FIG7 is a schematic diagram of a partial structure of a lower vehicle body provided in some other embodiments of the present application;

[0041] FIG8 is a schematic diagram of a partial structure of a lower vehicle body provided in some further embodiments of the present application;

[0042] FIG9 is an exploded schematic diagram of a chassis provided in some embodiments of the present application;

[0043] FIG10 is an exploded schematic diagram of a vehicle provided in some embodiments of the present application.

[0044] The accompanying drawings in the specific implementation manner are as follows:

[0045] 1- Lower body;

[0046] 10-energy chamber; 11-chamber body; 12-top cover plate;

[0047] 20-side beam;

[0048] 30-longitudinal beam; 30a-slot; 31-top wall; 32-bottom wall; 33-middle partition; 34-reinforcement rib; 35-side wall; 36-threaded hole;

[0049] 40-first fastener; 50-second fastener;

[0050] 2-battery; 201-battery monomer;

[0051] 3- Upper body;

[0052] 100-chassis; 1000-vehicle;

[0053] X-first direction; Y-second direction; Z-third direction; aa-broken line trajectory; bb-straight line trajectory. DETAILED DESCRIPTION

[0054] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0056] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0058] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0059] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0060] The term "plurality" used in this application refers to two or more (including two).

[0061] With the rapid development of automation and intelligent technology, new energy vehicles are becoming increasingly popular. In related technologies, when a vehicle's lower body is integrated with an energy storage tank, during a collision, the impact force will be transmitted and enter the energy storage tank, causing damage to the battery inside the energy storage tank and affecting the reliability of the lower body.

[0062] Based on this, the present application changes the relative positions of the side beams, longitudinal beams and energy bin of the lower vehicle body, so that when the vehicle is hit by a collision, the transmission and intrusion of the collision force to the energy bin can be reduced, thereby improving the reliability of the lower vehicle body during the collision process.

[0063] The technical solutions described in the embodiments of the present application are applicable to vehicles, which may be new energy vehicles, pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc.

[0064] Figure 1 is a schematic diagram of the partial structure of the lower vehicle body provided in some embodiments of the present application; Figure 2 is a partial enlarged view of point A in Figure 1; Figure 3 is a side view of the lower vehicle body provided in some embodiments of the present application; Figure 4 is a partial enlarged view of point B in Figure 3, and Figure 5 is a schematic diagram of the partial structure of the cross-sectional view along the CC direction in Figure 4.

[0065] As shown in Figures 1 to 5, an embodiment of the present application provides an undercarriage 1, which includes an energy bin 10, side beams 20, and longitudinal beams 30. The energy bin 10 includes a bin body 11 and a top cover 12. The top cover 12 is provided at one end of the bin body 11 along a first direction X. The energy bin 10 is provided with a side beam 20 on at least one side in a second direction Y, and the side beam 20 is connected to the top cover 12. The side beam 20 is connected to the longitudinal beam 30 on at least one side in a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect, and the side beam 20 and the longitudinal beam 30 are located on the side of the top cover 12 that is away from the bin body 11 in the first direction X.

[0066] The energy storage compartment 10 is used to house the battery 2. The battery 2 may include at least one battery cell 201, which may be one, two, or more. The compartment body 11 may be shaped like a polygon, a circle, an ellipse, or other regular or irregular shapes. The compartment body 11 may have a cavity for accommodating the battery 2.

[0067] The top cover plate 12 is disposed at one end of the compartment body 11 in the first direction X. The top cover plate 12 and the compartment body 11 may be fixedly connected. For example, after the battery 2 is placed in the compartment body 11, the top cover plate 12 and the compartment body 11 are fixedly connected by welding or other methods. Of course, the top cover plate 12 and the compartment body 11 may be detachably connected, for example, by fasteners such as bolts.

[0068] The energy bin 10 may be provided with a side beam 20 on one side in the second direction Y, or may be provided with side beams 20 on both sides in the second direction Y. The side beam 20 and the top cover plate 12 may be connected to each other in a fixed connection manner, or in a detachable connection manner.

[0069] The side beam 20 may be provided with a longitudinal beam 30 on one side in the third direction Z, or may be provided with longitudinal beams 30 on both sides in the third direction Z. The longitudinal beam 30 and the side beam 20 may be fixedly connected, or may be detachably connected.

[0070] The first direction X, the second direction Y, and the third direction Z intersect each other, and the angle between any two of them can be equal to 90 degrees. Of course, it can also be less than or greater than 90 degrees. For example, the first direction X can be understood as the height direction of the lower body 1, the second direction Y can be understood as the width direction of the lower body 1, and the third direction Z can be understood as the length direction of the lower body 1.

[0071] The side beams 20 and the longitudinal beams 30 are both located above the top cover 12 away from the silo body 11 in the first direction X. Along the third direction Z, the orthographic projections of the side beams 20 and the longitudinal beams 30 do not overlap with the energy silo 10 .

[0072] The lower vehicle body 1 provided in the embodiment of the present application includes an energy bin 10, a side beam 20, and a longitudinal beam 30. The bin body 11 of the energy bin 10 is used to place the battery 2, and the top cover plate 12 can encapsulate the battery 2 in the bin body 11 to ensure the installation of the battery 2. By providing the side beam 20 on at least one side of the battery 2 in the second direction Y, and the side beam 20 is connected to the longitudinal beam 30 on at least one side in the third direction Z, the functional requirements of the lower vehicle body 1 can be met. In addition, the first direction X, the second direction Y, and the third direction Z intersect, and the side beam 20 and the longitudinal beam 30 are located on the side of the top cover plate 12 in the first direction X away from the bin body 11, so that along the third direction Z, the orthographic projections of the side beam 20 and the longitudinal beam 30 do not overlap with the energy bin 10. When the vehicle 1000 in which the lower vehicle body 1 is used collides, the collision force transmitted by the longitudinal beam 30 can be transmitted through the overlapping part of the side beam 20 and the edge of the energy bin, reducing the increase in the contact area between the longitudinal beam 30 and the side beam 20 and the energy bin 10 due to collision deformation, thereby reducing the amount of intrusion into the energy bin 10 due to collision and the risk of damage to the battery 2 installed in the energy bin 10, thereby improving the reliability of the lower vehicle body 1.

[0073] In some embodiments, in at least one of the second direction Y and the third direction Z, the orthographic projection of the longitudinal beam 30 and the orthographic projection of the roof cover plate 12 have no overlapping area, which can also be understood as a staggered arrangement.

[0074] In at least one of the second direction Y and the third direction Z, the orthographic projection of the longitudinal beam 30 and the orthographic projection of the roof panel 12 are staggered.

[0075] In the second direction Y, the orthographic projection of the longitudinal beam 30 and the orthographic projection of the roof panel 12 may be staggered.

[0076] Alternatively, in the third direction Z, the orthographic projection of the longitudinal beam 30 and the orthographic projection of the roof panel 12 may be staggered.

[0077] Of course, in some embodiments, the orthographic projection of the longitudinal beam 30 and the orthographic projection of the top cover plate 12 in the second direction Y and the third direction Z may be staggered.

[0078] Through the above-mentioned arrangement, the longitudinal beam 30 can be arranged away from the energy bin 10, which is beneficial to reducing the contact area between the longitudinal beam 30 and the side beam 20 and the energy bin 10 due to collision deformation, thereby reducing the amount of intrusion into the energy bin 10 due to the collision of the vehicle 1000 and the risk of damage to the battery 2 installed in the energy bin 10, thereby improving the reliability of the lower vehicle body 1.

[0079] In some embodiments, in the lower vehicle body 1 provided by the embodiments of the present application, the longitudinal beam 30 has a slot 30 a , and the side beam 20 partially extends into the slot 30 a and is detachably connected to the longitudinal beam 30 .

[0080] The card slot 30a may be a slot body with one side open in the first direction X or the second direction Y. Of course, the card slot 30a may be a slot body with both sides open in the first direction X and the second direction Y.

[0081] The lower vehicle body 1 provided in the embodiment of the present application is advantageous in facilitating the positioning connection between the longitudinal beam 30 and the side beam 20 by providing a slot 30a on the longitudinal beam 30. The slot 30a can limit the side beam 20 to ensure the reliability of the connection between the longitudinal beam 30 and the side beam 20.

[0082] In some embodiments, the lower vehicle body 1 provided in the embodiment of the present application has the card slot 30a open along the first direction X toward one side of the top cover plate 12 , and the card slot 30a open along the second direction Y away from the side of the top cover plate 12 .

[0083] The slot 30a is at least partially recessed from one side of the longitudinal beam 30 facing the top cover plate 12 in the first direction X toward the side facing away from the top cover plate 12. Furthermore, at least partially recessed from one side of the longitudinal beam 30 facing away from the top cover plate 12 in the second direction Y toward the side where the top cover plate 12 is located. The slot 30a as a whole can be open on both sides and be roughly L-shaped or quasi-L-shaped.

[0084] The lower vehicle body 1 provided in this embodiment of the present application has the retaining slot 30a open along the first direction X toward the side of the roof panel 12 and along the second direction Y away from the side of the roof panel 12. This ensures that the longitudinal beam 30 can be directly engaged with the side beam 20 in both the first direction X and the second direction Y, facilitating assembly. Furthermore, the wall portions of the retaining slot 30a in both the first direction X and the second direction Y can limit the side beam 20, ensuring the secure connection between the longitudinal beam 30 and the side beam 20.

[0085] In some embodiments, the side beam 20 is at least partially stacked and detachably connected to the longitudinal beam 30 on a side facing away from the roof panel 12 in the first direction X.

[0086] That is, along the first direction X, the depth of the latching groove 30 a is smaller than the thickness of the longitudinal beam 30 .

[0087] Along the first direction X, the side beam 20 and the longitudinal beam 30 can be detachably connected by a snap connection, or by fasteners such as bolts, screws, and rivets.

[0088] The lower vehicle body 1 provided in the embodiment of the present application facilitates positioning and assembly of the side beams 20 and the longitudinal beams 30 in the first direction X by at least partially overlapping the side beams 20 on the side facing away from the roof panel 12 in the first direction X. Furthermore, by providing a detachable connection between the side beams 20 and the longitudinal beams 30 in the first direction X, assembly and disassembly of the side beams 20 and 30 is facilitated, while reducing the lower vehicle body 1's reliance on a body shop and improving maintainability.

[0089] FIG6 is a schematic diagram of a partial structure of the lower vehicle body 1 provided in some other embodiments of the present application.

[0090] As shown in Figures 1 to 6, in some embodiments, the lower vehicle body 1 provided in the embodiments of the present application further includes a first fastener 40, which is inserted into the longitudinal beam 30 and the side beam 20 along the first direction X and is detachably connected to at least one of the side beam 20 and the longitudinal beam 30.

[0091] The first fastener 40 may include a bolt, a screw, a rivet or other fasteners.

[0092] The number of the first fasteners 40 included in the lower vehicle body 1 may be one or more. When there are more than one first fasteners 40 , the first fasteners 40 may be distributed along a straight line track, or of course, along a broken line track.

[0093] The first fastener 40 can be detachably connected to one of the side beam 20 and the longitudinal beam 30 and disposed on the other. Of course, the first fastener 40 can also be detachably connected to both of the side beam 20 and the longitudinal beam 30.

[0094] The lower vehicle body 1 provided in the embodiment of the present application includes a first fastener 40, and the first fastener 40 is inserted into the longitudinal beam 30 and the side beam 20 along the first direction X and is detachably connected to at least one of the side beam 20 and the longitudinal beam 30. This can ensure the connection strength between the side beam 20 and the longitudinal beam 30, and can ensure the convenience of disassembly and assembly between the side beam 20 and the longitudinal beam 30 in the first direction X.

[0095] In some embodiments, in the lower vehicle body 1 provided in the embodiments of the present application, the side beam 20 is at least partially stacked and detachably connected to the longitudinal beam 30 on the side facing the roof cover plate 12 in the second direction Y.

[0096] That is, along the second direction Y, the depth of the latching groove 30 a is smaller than the thickness of the longitudinal beam 30 .

[0097] Along the second direction Y, the side beam 20 and the longitudinal beam 30 can be detachably connected by a snap connection, or by fasteners such as bolts, screws, and rivets.

[0098] In the lower vehicle body 1 provided in the embodiment of the present application, the side beam 20 is at least partially stacked with the longitudinal beam 30 on the side facing the roof panel 12 in the second direction Y. This facilitates positioning and assembly of the side beam 20 and the longitudinal beam 30 in the second direction Y. Furthermore, by providing a detachable connection between the side beam 20 and the longitudinal beam 30 in the second direction Y, assembly and disassembly of the side beam 20 and the longitudinal beam 30 is also facilitated, while reducing the lower vehicle body 1's reliance on a body shop and improving maintainability.

[0099] As shown in FIG. 4 and FIG. 5 , in some embodiments, the lower vehicle body 1 further includes a second fastener 50 , which is inserted into the longitudinal beam 30 and the side beam 20 along the second direction Y and is detachably connected to at least one of the side beam 20 and the longitudinal beam 30 .

[0100] The number of the second fasteners 50 included in the lower body 1 can be one or more. When there are more than one second fasteners 50 , the multiple second fasteners 50 can be distributed along a straight line track, or of course, can also be distributed along a broken line track.

[0101] The second fastener 50 can be detachably connected to one of the side beam 20 and the longitudinal beam 30 and arranged on the other. Of course, the second fastener 50 can also be detachably connected to both of the side beam 20 and the longitudinal beam 30.

[0102] The second fastener 50 may include a bolt, a screw, a rivet or other fasteners.

[0103] The lower vehicle body 1 provided in the embodiment of the present application includes a second fastener 50, and the second fastener 50 is inserted into the longitudinal beam 30 and the side beam 20 along the second direction Y and is detachably connected to at least one of the side beam 20 and the longitudinal beam 30. This can ensure the connection strength between the side beam 20 and the longitudinal beam 30, and can ensure the convenience of disassembly and assembly between the side beam 20 and the longitudinal beam 30 in the second direction Y.

[0104] Optionally, a threaded hole 36 may be integrated on the longitudinal beam 30 to ensure connection with the second fastener 50 .

[0105] FIG7 is a schematic diagram of a partial structure of the lower vehicle body 1 provided in some other embodiments of the present application.

[0106] As shown in FIG. 7 , in some embodiments, the lower vehicle body 1 provided in the embodiment of the present application has a plurality of second fasteners 50 , and the plurality of second fasteners 50 are spaced apart along the broken line trajectory aa in the third direction Z.

[0107] The track formed by connecting the centers of the second fasteners 50 in sequence can be understood as the above-mentioned broken line track aa. The broken line track aa can be wavy or sawtooth-shaped with concave and convex settings.

[0108] The lower vehicle body 1 provided in the embodiment of the present application improves the connection efficiency between the longitudinal beam 30 and the side beam 20 through the above-mentioned arrangement, while improving the stability of the joint between the side beam 20 and the longitudinal beam 30, thereby ensuring the reliability of the lower vehicle body 1.

[0109] In some optional embodiments, the lower vehicle body 1 provided in the embodiments of the present application has a plurality of second fasteners 50 arranged in two groups, each group including at least two second fasteners 50, the two groups of second fasteners 50 are spaced apart in the first direction X and alternately arranged in the third direction Z, and the second fasteners 50 in the same group are spaced apart along a straight line in the third direction Z.

[0110] When the plurality of second fastening members 50 are arranged in two groups, each group may include two, three or more second fastening members 50 .

[0111] The second fasteners 50 of the same group are spaced apart along a straight line in the third direction Z, which can be understood as the centers of the second fasteners 50 of the same group are connected to form a straight line track bb.

[0112] Since the two groups of second fasteners 50 are spaced apart in the first direction X and alternately arranged in the third direction Z, two adjacent second fasteners 50 in the first direction X are connected in sequence to form a broken line trajectory aa as a whole.

[0113] The lower vehicle body 1 provided in the embodiment of the present application is advantageous in that the second fasteners 50 are distributed at multiple points along the broken line trajectory aa by grouping the plurality of second fasteners 50 and adopting the above-mentioned distribution method, thereby improving the connection efficiency between the longitudinal beam 30 and the side beam 20 while ensuring the stability of the joint between the side beam 20 and the longitudinal beam 30.

[0114] Continuing to refer to Figures 2 to 7, in some optional embodiments, the lower vehicle body 1 provided in the embodiments of the present application, the longitudinal beam 30 includes a top wall 31, a bottom wall 32 and a middle partition 33 located between the top wall 31 and the bottom wall 32, and reinforcing ribs 34 are respectively connected between the top wall 31 and the middle partition 33 and between the bottom wall 32 and the middle partition 33.

[0115] The shapes of the top wall 31 and the bottom wall 32 may be the same, or they may be different. The orthographic projections of the top wall 31 and the bottom wall 32 in the first direction X at least partially overlap.

[0116] The middle partition 33 is located between the top wall 31 and the bottom wall 32. Along the first direction X, the vertical distance from the middle partition 33 to the top wall 31 and the vertical distance from the middle partition 33 to the bottom wall 32 can be equal. That is, the middle partition 33 can be located in the middle between the top wall 31 and the bottom wall 32. Of course, the vertical distance from the middle partition 33 to one of the top wall 31 and the bottom wall 32 can be greater than the vertical distance to the other. In other words, the middle partition 33 can be located closer to one of the top wall 31 and the bottom wall 32 and farther away from the other.

[0117] The number of the reinforcing ribs 34 connected between the middle partition 33 and the top wall 31 may be equal to or different from the number of the reinforcing ribs 34 connected between the middle partition 33 and the bottom wall 32 .

[0118] The reinforcing rib 34 may be a plate-shaped body extending along the first direction X, or may be a plate-shaped body extending along a direction intersecting the first direction X.

[0119] The lower vehicle body 1 provided in the embodiment of the present application and the longitudinal beam 30 adopt the above-mentioned structural form, which can improve its own rigidity, so that when the lower vehicle body 1 is used in the vehicle 1000, it can provide effective assistance to the bending rigidity of the entire vehicle.

[0120] In some optional embodiments, the top wall 31 , the bottom wall 32 , the middle partition 33 and the reinforcing ribs 34 may adopt an integrated structure, which effectively improves the rigidity of the longitudinal beam 30 and facilitates the forming of the longitudinal beam 30 .

[0121] FIG8 is a schematic diagram of a partial structure of the lower vehicle body 1 provided in some further embodiments of the present application.

[0122] As shown in FIG8 , in some optional embodiments, the lower vehicle body 1 provided in the embodiment of the present application has reinforcing ribs 34 between the top wall 31 and the middle partition 33 and reinforcing ribs 34 between the bottom wall 32 and the middle partition 33 arranged alternately along the third direction Z.

[0123] Through the above arrangement, the middle partition plate 33 can support the reinforcing ribs 34 at multiple points, thereby ensuring uniform stiffness of the longitudinal beam 30 at all locations.

[0124] In some optional embodiments, the lower vehicle body 1 provided in the embodiments of the present application has a longitudinal beam 30 having a side wall 35 arranged toward the side beam 20 along the third direction Z, the side wall 35 is connected between the top wall 31 and the bottom wall 32, and the middle partition 33 extends to the side wall 35 along the third direction Z and is connected to the side wall 35.

[0125] The lower vehicle body 1 provided in the embodiment of the present application ensures that the middle partition 33 extends in a large dimension in the third direction Z by extending the middle partition 33 to the side wall 35 along the third direction Z and being connected to the side wall 35. Therefore, when the vehicle 1000 to which the lower vehicle body 1 is applied collides and generates a collision force, the collision force can be transmitted through the middle partition 33 extending along the third direction Z, thereby ensuring the continuity of the force transmission path, reducing the amount of intrusion into the energy bin 10 due to the collision of the vehicle 1000 and the risk of damage to the battery 2 installed in the energy bin 10, and improving the reliability of the lower vehicle body 1.

[0126] As shown in Figures 1 to 8, an optional embodiment of the lower vehicle body 1 provided in an embodiment of the present application includes an energy bin 10, a side beam 20, a longitudinal beam 30, a first fastener 40 and a second fastener 50. The energy bin 10 includes a bin body 11 and a top cover plate 12. The top cover plate 12 is arranged at one end of the bin body 11 along the first direction X. The energy bin 10 is provided with side beams 20 on both sides of the second direction Y, and the side beams 20 are connected to the top cover plate 12. The side beams 20 are connected to the longitudinal beams 30 on both sides of the third direction Z. Among them, the side beams 20 and the longitudinal beams 30 are located on the side of the top cover plate 12 away from the bin body 11 in the first direction X, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other. In the second direction Y and the third direction Z, the orthographic projection of the longitudinal beam 30 and the orthographic projection of the top cover plate 12 do not overlap. The longitudinal beam 30 has a slot 30a, which is open along the first direction X on one side of the top cover plate 12, and the slot 30a is open along the second direction Y on the side away from the top cover plate 12. The side beam 20 partially extends into the slot 30a. The side beam 20 is at least partially stacked with the longitudinal beam 30 on the side away from the top cover plate 12 in the first direction X and is detachably connected by a first fastener 40. The side beam 20 is at least partially stacked with the longitudinal beam 30 on the side facing the top cover plate 12 in the second direction Y and is detachably connected by a second fastener 50. The number of the second fasteners 50 is multiple, and the multiple second fasteners 50 are arranged in two groups, each group including at least two second fasteners 50. The two groups of second fasteners 50 are spaced apart in the first direction X and alternately arranged in the third direction Z. The second fasteners 50 of the same group are arranged in a plurality of groups. The two fasteners 50 are distributed along a straight line in the third direction Z, and the multiple second fasteners 50 are distributed along the broken line trajectory aa in the third direction Z. The longitudinal beam 30 includes a top wall 31, a bottom wall 32 and a middle partition 33 located between the top wall 31 and the bottom wall 32 along the first direction X. Reinforcing ribs 34 are respectively connected between the top wall 31 and the middle partition 33 and between the bottom wall 32 and the middle partition 33. Along the third direction Z, the reinforcing ribs 34 located between the top wall 31 and the middle partition 33 and the reinforcing ribs 34 located between the bottom wall 32 and the middle partition 33 are alternately arranged. The longitudinal beam 30 has a side wall 35 arranged toward the side beam 20 along the third direction Z. The side wall 35 is connected between the top wall 31 and the bottom wall 32. The middle partition 33 extends to the side wall 35 along the third direction Z and is connected to the side wall 35.

[0127] FIG9 is an exploded schematic diagram of the chassis 100 provided in some embodiments of the present application.

[0128] As shown in FIG9 , in a second aspect, an embodiment of the present application further provides a chassis 100 comprising the lower vehicle body 1 and a battery 2 provided in the above embodiments. The battery 2 is disposed in an energy compartment 10. The battery 2 may include at least one battery cell 201, and may optionally include a plurality of battery cells 201.

[0129] The chassis 100 provided in the embodiment of the present application includes the lower vehicle body 1 and the battery 2 provided in the above-mentioned embodiments. By integrating the energy bin 10 on the lower vehicle body 1, it can not only ensure the installation requirements of the battery 2, but also eliminate the need for an additional housing for the battery 2, thereby saving space and reducing costs. At the same time, by using the lower vehicle body 1 provided in the above-mentioned embodiments, when the chassis 100 is used in a collision with the vehicle 1000, the collision force transmitted by the longitudinal beam 30 can be transmitted through the overlapping portion between the side beam 20 and the energy bin 10, thereby reducing the increase in the contact area between the longitudinal beam 30 and the side beam 20 and the energy bin 10 due to collision deformation, thereby reducing the amount of intrusion into the energy bin 10 due to the collision of the vehicle 1000 and the risk of damage to the battery 2 installed in the energy bin 10, thereby improving the reliability of the lower vehicle body 1.

[0130] Figure 10 is an exploded schematic diagram of a vehicle 1000 provided in some embodiments of the present application.

[0131] As shown in FIG10 , in a third aspect, an embodiment of the present application further provides a vehicle 1000 , comprising the chassis 100 and the upper body 3 provided in the above embodiment, wherein the upper body 3 is arranged on the chassis 100 and connected to the lower body 1 .

[0132] The vehicle 1000 provided in the embodiment of the present application includes the chassis 100 and the upper body 3 provided in the above-mentioned embodiments. When the vehicle 1000 collides, the collision force transmitted by the longitudinal beam 30 can be transmitted through the overlapping portion of the side beam 20 and the energy bin 10, thereby reducing the increase in the contact area between the longitudinal beam 30 and the side beam 20 and the energy bin 10 due to collision deformation, thereby reducing the amount of intrusion into the energy bin 10 due to the collision of the vehicle 1000 and the risk of damage to the battery 2 installed in the energy bin 10, thereby improving the reliability of the lower body 1.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A lower vehicle body, comprising: An energy bin, comprising a bin body and a top cover plate, wherein the top cover plate is arranged at one end of the bin body along a first direction; A side beam, wherein the energy bin is provided with the side beam on at least one side of the second direction, and the side beam is connected to the top cover plate; A longitudinal beam, wherein the side beam is connected to the longitudinal beam on at least one side of the side beam in the third direction; The first direction, the second direction and the third direction intersect, and the side beam and the longitudinal beam are located on a side of the top cover plate that is away from the bin body in the first direction.

2. The undercarriage according to claim 1, wherein: In at least one of the second direction and the third direction, an orthographic projection of the longitudinal beam and an orthographic projection of the roof cover plate have no overlapping area.

3. The undercarriage according to claim 1 or 2, wherein: The longitudinal beam has a slot, and the side beam partially extends into the slot and is detachably connected to the longitudinal beam.

4. The undercarriage according to claim 3, wherein: The card slot is open along the first direction toward one side of the top cover plate, and the card slot is open along the second direction away from one side of the top cover plate.

5. The undercarriage according to any one of claims 1 to 4, wherein: The side beam is at least partially stacked and detachably connected to the longitudinal beam on the side facing away from the roof cover plate in the first direction.

6. The undercarriage according to claim 5, wherein: The lower vehicle body further includes a first fastener, which is inserted into the longitudinal beam and the side beam along the first direction and is detachably connected to at least one of the side beam and the longitudinal beam.

7. The undercarriage according to any one of claims 1 to 6, wherein: The side beam is at least partially stacked and detachably connected with the longitudinal beam on one side of the second direction facing the top cover plate.

8. The undercarriage according to claim 7, wherein: The lower vehicle body further includes a second fastener, which is inserted into the longitudinal beam and the side beam along the second direction and is detachably connected to at least one of the side beam and the longitudinal beam.

9. The undercarriage according to claim 8, wherein: There are multiple second fasteners, and the multiple second fasteners are spaced apart along a fold line track along the third direction.

10. The undercarriage according to claim 9, wherein: The plurality of second fasteners are arranged in two groups, each group includes at least two second fasteners, the two groups of second fasteners are spaced apart in the first direction and alternately arranged in the third direction, and the second fasteners in the same group are spaced apart along a straight line in the third direction.

11. The undercarriage according to any one of claims 1 to 10, wherein: The longitudinal beam includes a top wall, a bottom wall and a middle partition plate located between the top wall and the bottom wall along the first direction. Reinforcing ribs are respectively connected between the top wall and the middle partition plate and between the bottom wall and the middle partition plate.

12. The undercarriage according to claim 11, wherein: Along the third direction, the reinforcing ribs between the top wall and the middle partition plate and the reinforcing ribs between the bottom wall and the middle partition plate are alternately arranged.

13. The undercarriage according to claim 11 or 12, wherein: The longitudinal beam has a side wall disposed toward the side beam along the third direction, the side wall is connected between the top wall and the bottom wall, and the middle partition extends to the side wall along the third direction and is connected to the side wall.

14. A chassis comprising: The undercarriage according to any one of claims 1 to 13; The battery is arranged in the energy compartment.

15. A vehicle comprising: The chassis as claimed in claim 14; The upper body is arranged on the chassis and connected with the lower body.

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