Lower vehicle body, chassis and vehicle

Abstract

A lower vehicle body (1), a chassis (100) and a vehicle (1000), the lower vehicle body (1) comprises a chemical bin (10) and a longitudinal beam (20), the chemical bin (10) comprises a bin body (11) and boundary beams (12), the bin body (11) is connected with the boundary beams (12) on two sides of a first direction (X), the boundary beams (12) extend along a second direction (Y), and the first direction (X) and the second direction (Y) are arranged in an intersecting manner. Longitudinal beams (20) are arranged on at least one side of the chemical bin (10) in the first direction (X), and the longitudinal beams (20) and the edge beams (12) are arranged in an attached mode and connected with each other.

Description

Underbody, 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 intelligent technology, new energy vehicles are becoming increasingly popular and popular among the public. In the process of new energy vehicle development, how to reduce the space waste under the vehicle body and increase the battery capacity in the chemical compartment is a research direction in vehicle technology.

[0003] Summary of the Invention

[0004] In view of the above problems, the present application provides a lower body, a chassis and a vehicle to reduce the space waste of the vehicle body and increase the capacity of the battery in the chemical chamber.

[0005] In a first aspect, embodiments of the present application provide an undercarriage comprising a chemical chamber and a longitudinal beam. The chemical chamber comprises a chamber body and side beams. The chamber body is connected to the side beams on both sides in a first direction. The side beams extend along a second direction, and the first and second directions intersect. The chemical chamber is provided with a longitudinal beam on at least one side in the first direction. The longitudinal beam is disposed in contact with and connected to the side beams.

[0006] The lower vehicle body provided in the embodiments of the present application includes a chemical chamber and longitudinal beams. The chemical chamber body is used to house batteries, and the side beams are used to connect to the chamber body and the longitudinal beams, thereby ensuring the functional requirements of the lower vehicle body. Furthermore, the longitudinal beams and side beams are arranged in a flat and interconnected manner, without requiring a direct connection between them or requiring a spacing between them and connecting via adapters. This reduces space waste within the lower vehicle body of the same size, providing more space for the chemical chamber.

[0007] In some embodiments, a first hole extending along a first direction is provided on the longitudinal beam, a second hole arranged opposite to the first hole is provided on the side beam, and the lower body includes a first connecting member, which is inserted into the first hole and the second hole and connects the longitudinal beam and the side beam.

[0008] The lower vehicle body provided in the embodiment of the present application is equipped with a first hole extending in a first direction on the longitudinal beam and a second hole corresponding to the first hole on the side beam. The first connecting member is used to achieve the requirements of fitting and directly connecting the longitudinal beam and the side beam. There is no need to add a new adapter such as a door sill beam to serve as a transition between the two, and the connection strength between the longitudinal beam and the side beam can be guaranteed.

[0009] In some embodiments, the first hole is a through hole, the second hole is a blind hole, and the first connecting member is threadedly connected to at least one of the longitudinal beam and the side beam.

[0010] The lower vehicle body provided in the embodiment of the present application utilizes a through-hole as the first hole and a blind hole as the second hole, facilitating the first connecting member's penetration into the longitudinal beam and the side beam. Furthermore, threading the first connecting member into at least one of the longitudinal beam and the side beam facilitates fixing the relative position of the longitudinal beam and the side beam, thereby improving the connection strength between the two. Furthermore, the threaded connection has a self-locking function, reducing the risk of the side beam and the longitudinal beam separating during alignment of the lower vehicle body. The blind hole configuration of the second hole prevents contaminants such as external moisture from entering the silo body, thereby ensuring the silo body's sealing performance.

[0011] In some embodiments, the first hole is a strip-shaped hole and its length direction is parallel to the second direction.

[0012] The lower vehicle body provided in the embodiment of the present application can offset the manufacturing and processing tolerances and on-site assembly tolerances of the longitudinal beam and side beam parts by making the first hole a strip-shaped hole with the length direction parallel to the second direction, thereby ensuring the connection and assembly requirements of the two.

[0013] In some embodiments, an avoidance gap is further provided on the longitudinal beam, and the avoidance gap is provided around the first hole.

[0014] The lower vehicle body provided in the embodiment of the present application is provided with an avoidance gap, so that the first connecting member can avoid the disassembly and assembly tools during disassembly and assembly, which is beneficial to the disassembly and assembly of the first connecting member.

[0015] In some embodiments, the number of the first holes and the number of the second holes are both multiple, the first holes and the second holes are arranged one to one, and a first connecting member is disposed in each group of the first holes and the second holes that are arranged opposite to each other.

[0016] The lower vehicle body provided in the embodiment of the present application has multiple first holes and one-to-one arrangement of the second holes, so that the longitudinal beam and the side beam can be connected at multiple points, thereby improving the connection strength between the two.

[0017] In some embodiments, the longitudinal beam includes a wall portion enclosing an inner cavity, a column located in the inner cavity, and reinforcing ribs connecting the column and the wall portion, and the first hole is provided in the column.

[0018] The lower vehicle body provided in the embodiment of the present application adopts the above-mentioned structural form of the longitudinal beam, which can ensure its strength while meeting the requirements for the arrangement of the first hole. At the same time, it can also achieve the effects of economical use, weight reduction and cost reduction.

[0019] In some embodiments, along the first direction, a third hole is provided on the side of the side beam facing the warehouse body, and a fourth hole is provided on the longitudinal beam opposite to the third hole. The lower body also includes a second connecting member, which is inserted into the third hole and the fourth hole and connects the longitudinal beam and the side beam.

[0020] The lower vehicle body provided in the embodiment of the present application is equipped with a third hole extending along the first direction on the longitudinal beam and a fourth hole corresponding to the third hole on the side beam. A second connecting member is used to achieve a reinforced connection between the longitudinal beam and the side beam. There is no need to add a new adapter such as a threshold beam to serve as a transition between the two. A reinforced connection between the longitudinal beam and the side beam can be achieved, thereby ensuring the reliability and sealing of the connection between the two.

[0021] In some embodiments, the number of the third holes and the number of the fourth holes are both multiple, the third holes and the fourth holes are arranged one to one, and a second connecting member is arranged in each group of the third holes and the fourth holes that are arranged opposite to each other.

[0022] The lower vehicle body provided in the embodiment of the present application further enables multi-point connection between the longitudinal beam and the side beam by making the number of the third holes and the fourth holes multiple and arranged one-to-one, thereby improving the connection strength between the two.

[0023] In some embodiments, the lower vehicle body further includes a first colloid, and the first colloid is provided at the connection between the second connecting member and the longitudinal beam, and the first colloid seals the gap between the second connecting member and the hole wall of the fourth hole.

[0024] The lower vehicle body provided in the embodiment of the present application, by including a first colloid, can seal the gap formed between the fourth hole of the longitudinal beam starting from the side close to the warehouse body and the second connecting piece, thereby ensuring the sealing of the longitudinal beam. When a battery is placed in the warehouse body, the sealing performance of the battery can be guaranteed.

[0025] In some embodiments, at least one side of the longitudinal beam in the third direction is welded to the side beam, and the third direction intersects with the first direction and the second direction.

[0026] The lower vehicle body provided by the present application can improve the connection strength between the longitudinal beam and the side beam by welding the longitudinal beam to the side beam on at least one side in the third direction. At the same time, the welding method can improve the sealing at the joint between the side beam and the longitudinal beam, thereby improving the safety performance of the lower vehicle body.

[0027] In some embodiments, the longitudinal beam includes a first mating portion and a second mating portion that are intersectingly arranged. The first mating portion is stacked and welded with the side beam in a third direction, and the second mating portion is clamped between the side beam and the bin body and welded to the side beam on the side of the third direction away from the first mating portion.

[0028] The lower vehicle body provided in the embodiment of the present application has a longitudinal beam adopting the above-mentioned structural form, so that it can be distributed through the first matching portion and the second matching portion and welded to the side beam to ensure the connection strength between the two.

[0029] In some embodiments, the lower vehicle body further includes a second colloid, and the second colloid is provided at the joint between the first matching portion and the side beam on the side facing away from the bin body in the first direction, and / or the second matching portion is provided at the joint between the second matching portion and the side beam on the side facing away from the first matching portion in the third direction.

[0030] The lower vehicle body provided in the embodiment of the present application can ensure the connection strength between the longitudinal beam and the side beam through the above-mentioned arrangement, and improve the integrity and sealing between the two.

[0031] In some embodiments, the lower vehicle body further includes a third adhesive, and along the first direction, the third adhesive is bonded between the longitudinal beam and the side beam.

[0032] The lower vehicle body provided in the embodiment of the present application can ensure the integrity and connection strength between the longitudinal beam and the side beam by disposing a third colloid between the longitudinal beam and the side beam. Furthermore, the provision of the third colloid can ensure the sealing between the longitudinal beam and the side beam, reducing the gap between the two and improving the sealing performance.

[0033] 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 a chemical chamber.

[0034] 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

[0035] 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.

[0036] FIG1 is a partial isometric view of a lower vehicle body provided by some embodiments of the present application;

[0037] FIG2 is a partial front view of a lower vehicle body provided by some embodiments of the present application;

[0038] FIG3 is a partial enlarged view of point A in FIG2 ;

[0039] FIG4 is a partial schematic diagram of the cooperation between the side beam and the longitudinal beam of the lower vehicle body provided by some embodiments of the present application;

[0040] FIG5 is a partial axonometric view of a longitudinal beam according to some embodiments of the present application;

[0041] FIG6 is a partial cross-sectional view of a lower vehicle body according to some embodiments of the present application;

[0042] Figure 7 is an enlarged view of point B in Figure 6;

[0043] Figure 8 is an enlarged view of point C in Figure 1;

[0044] FIG9 is an exploded schematic diagram of a chassis provided in some embodiments of the present application;

[0045] FIG10 is an exploded schematic diagram of a vehicle provided in some embodiments of the present application.

[0046] The accompanying drawings in the specific implementation manner are as follows:

[0047] 1- Lower body;

[0048] 10-chemical chamber; 11-chamber body; 12-side beam; 121-second hole; 122-third hole;

[0049] 20 - longitudinal beam; 201 - first hole; 202 - fourth hole; 203 - avoidance gap; 21 - wall; 22 - column; 23 - reinforcement rib; 24 - inner cavity; 20a - first matching portion; 20b - second matching portion;

[0050] 30-first connecting piece; 40-second connecting piece; 50-first colloid; 60-second colloid; 70-third colloid; 80-first welding body; 90-second welding body;

[0051] 2-battery; 2a-battery monomer;

[0052] 3- Upper body;

[0053] 100-chassis; 1000-vehicle;

[0054] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] The term "plurality" used in this application refers to two or more (including two).

[0062] With the rapid development of automation and intelligent technology, new energy vehicles are becoming increasingly popular and popular among the public. Driven by the demand for longer driving range, integrating batteries directly into the vehicle body has become an inevitable trend in the industry, achieving the goal of increasing vehicle range.

[0063] In the related art, an additional adapter is required between the longitudinal beam of the lower vehicle body and the side beam of the chemical tank to connect the two. This structure wastes a large amount of space in the lower vehicle body, which is not conducive to increasing the space occupied by the chemical tank, and further not conducive to increasing the battery capacity and driving range.

[0064] Based on this, the present application changes the connection method between the longitudinal beam and the side beam so that the two are at least partially stacked and can be directly connected, without the need for intervals and connection through adapters. This allows the lower vehicle body to reduce space waste under the same size conditions and provide a larger space for the chemical warehouse.

[0065] 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.

[0066] As shown in Figures 1 to 4, an embodiment of the present application provides an undercarriage 1 including a chemical chamber 10 and a longitudinal beam 20. The chemical chamber 10 includes a chamber body 11 and side beams 12. The chamber body 11 is connected to the side beams 12 on both sides in a first direction X. The side beams 12 extend along a second direction Y, with the first direction X and the second direction Y intersecting. The chemical chamber 10 is provided with a longitudinal beam 20 on at least one side in the first direction X. The longitudinal beam 20 is disposed in contact with and connected to the side beams 12.

[0067] The chemical chamber 10 is used to house the battery 2. The battery 2 may include at least one battery cell 2a, which may be one, two, or more. The chamber body 11 may be shaped like a polygon, a circle, an ellipse, or other shapes, and may be regular or irregular. The chamber body 11 may have a cavity for accommodating the battery 2.

[0068] The angle between the first direction X and the second direction Y 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 the width direction of the lower body 1, and the second direction Y can be the length direction of the compartment body 11, for example, the direction of travel of the automobile when the lower body 1 is used.

[0069] The chemical chamber 10 may be provided with a longitudinal beam 20 on one side in the first direction X. Of course, the chemical chamber 10 may also be provided with a longitudinal beam 20 on both sides in the first direction X.

[0070] The longitudinal beam 20 and the side beam 12 are arranged in close contact with each other, which can be understood as the longitudinal beam 20 and the side beam 12 are stacked on each other and directly connected.

[0071] The lower vehicle body 1 provided in the embodiment of the present application includes a chemical chamber 10 and a longitudinal beam 20. The chamber body 11 of the chemical chamber 10 is used to house the batteries 2, and the side beams 12 are used to connect to the chamber body 11 and the longitudinal beams 20, thereby ensuring the functional requirements of the lower vehicle body 1. Furthermore, the longitudinal beams 20 and the side beams 12 are arranged in a close-fitting manner and interconnected, without requiring a direct connection between them or requiring a spacing between them and connecting them via an adapter. This allows the lower vehicle body 1 to reduce space waste while maintaining the same size, providing more space for the chemical chamber 10.

[0072] In some embodiments, a first hole 201 extending along a first direction X is provided on the longitudinal beam 20, a second hole 121 arranged opposite to the first hole 201 is provided on the side beam 12, and the lower body 1 includes a first connecting member 30, which is inserted into the first hole 201 and the second hole 121 and connects the longitudinal beam 20 and the side beam 12.

[0073] The first hole 201 may be a circular hole, an elliptical hole, or a polygonal hole. The shape and radial size of the second hole 121 may be the same as or different from the shape and radial size of the first hole 201 .

[0074] The number of the first holes 201 can be one or more, and the number of the second holes 121 can be equal to the number of the first holes 201 and arranged one-to-one. Of course, to ensure connection requirements, the number of one of the first holes 201 and the second holes 121 can be greater than the other to achieve redundant hole arrangement.

[0075] The first connecting member 30 may include but is not limited to connecting structures such as bolts, rivets, and pins. A first connecting member 30 may be inserted into each set of the first holes 201 and the second holes 121 that are arranged opposite to each other.

[0076] The lower vehicle body 1 provided in the embodiment of the present application is provided with a first hole 201 extending along the first direction X on the longitudinal beam 20, and a second hole 121 corresponding to the first hole 201 is provided on the side beam 12. By utilizing the first connecting member 30, the longitudinal beam 20 and the side beam 12 can be fitted and directly connected to each other, without adding a new adapter such as a threshold beam to serve as a transition between the two, thereby ensuring the connection strength between the longitudinal beam 20 and the side beam 12.

[0077] In some embodiments, the first hole 201 is a through hole, the second hole 121 is a blind hole, and the first connecting member 30 is threadedly connected to at least one of the longitudinal beam 20 and the side beam 12 .

[0078] Along the first direction X, the first hole 201 may be provided through the longitudinal beam 20 to form a through hole in the longitudinal beam 20 .

[0079] Along the first direction X, the extension dimension of the second hole 121 is smaller than the thickness of the side beam 12 at the position where the second hole 121 is provided, so that the second hole 121 is a blind hole.

[0080] Threads may be provided on the walls of both the first hole 201 and the second hole 121 to connect with the first connecting member 30. Of course, threads may also be provided on the wall of one of the first hole 201 and the second hole 121. The first connecting member 30 may be inserted into the side of the unthreaded first hole 201 or the second hole 121 along the first direction X, and be threadedly connected with the other of the threaded first hole 201 or the second hole 121, thereby achieving the connection between the side beam 12 and the longitudinal beam 20.

[0081] The lower vehicle body 1 provided in the embodiment of the present application is facilitated by making the first hole 201 a through hole and the second hole 121 a blind hole, which facilitates the first connecting member 30 to penetrate the longitudinal beam 20 and the side beam 12. At the same time, by making the first connecting member 30 threadedly connected to at least one of the longitudinal beam 20 and the side beam 12, it is beneficial to fix the relative position between the longitudinal beam 20 and the side beam 12, thereby improving the connection strength between the two. In addition, the threaded connection has a self-locking function, which can reduce the risk of the side beam 12 and the longitudinal beam 20 being separated from each other during the alignment process of the lower vehicle body 1. The second hole 121 is set in the form of a blind hole, which can prevent external pollutants such as water vapor from entering the bin body 11, ensure the sealing performance of the bin body 11, and improve the protection level of the battery 2 inside it.

[0082] In some optional embodiments, in the lower vehicle body 1 provided in the embodiments of the present application, the first hole 201 is a strip-shaped hole and its length direction is parallel to the second direction Y.

[0083] The first hole 201 may be in an oval, a round, or a rectangular shape.

[0084] For example, when the first hole 201 is elliptical, its length direction may be the direction of its long axis; when the first hole 201 is oval, its length direction may be the direction in which its two arc-shaped sides are relatively distributed.

[0085] The lower vehicle body 1 provided in the embodiment of the present application can offset the manufacturing and processing tolerances and on-site assembly tolerances of the longitudinal beam 20 and the side beam 12 parts by making the first hole 201 a strip-shaped hole with the length direction parallel to the second direction Y, thereby ensuring the connection and assembly requirements between the two.

[0086] In some optional embodiments, in the lower vehicle body 1 provided in the embodiments of the present application, an avoidance gap 203 is further provided on the longitudinal beam 20 , and the avoidance gap 203 is provided around the first hole 201 .

[0087] The relief recess 203 can be formed by removing material from the longitudinal beam 20 in a region surrounding the first hole 201 .

[0088] The avoidance gap 203 can be set from the side of the longitudinal beam 20 away from the warehouse body 11 along the first direction X to the side groove where the warehouse body 11 is located. It can be in the shape of an annular groove and set around the first hole 201.

[0089] Each first hole 201 may be provided with a corresponding avoidance gap 203 .

[0090] The lower vehicle body 1 provided in the embodiment of the present application is provided with an avoidance notch 203 , so that the first connecting member 30 can avoid the disassembly and assembly tools during disassembly and assembly, thereby facilitating the disassembly and assembly of the first connecting member 30 .

[0091] In some optional embodiments, the number of the first holes 201 and the second holes 121 are both multiple, the first holes 201 and the second holes 121 are arranged one-to-one, and a first connecting member 30 is provided in each group of relatively arranged first holes 201 and second holes 121.

[0092] The number of the first holes 201 and the number of the second holes 121 can be two, three or more.

[0093] The distribution pattern of the first holes 201 and the distribution pattern of the second holes 121 may be the same.

[0094] The plurality of first holes 201 may be spaced apart along the same direction. Of course, some of the plurality of first holes 201 may be spaced apart along the second direction Y and some may be spaced apart along the third direction Z.

[0095] The lower vehicle body 1 provided in the embodiment of the present application has multiple first holes 201 and one-to-one arrangement of the second holes 121 , so that the longitudinal beam 20 and the side beam 12 can be connected at multiple points, thereby improving the connection strength between the two.

[0096] As shown in Figures 1 to 5, in some embodiments, the lower vehicle body 1 provided in the embodiments of the present application, the longitudinal beam 20 includes a wall portion 21 enclosing an inner cavity 24, a column 22 located in the inner cavity 24, and a reinforcing rib 23 connecting the column 22 and the wall portion 21, and the first hole 201 is set in the column 22.

[0097] There may be a plurality of columns 22 disposed in the inner cavity 24 and the columns 22 may be spaced apart from each other. The columns 22 may extend along the ground direction, and each first hole 201 may be disposed on one of the columns 22 .

[0098] The reinforcing ribs 23 are used to connect the column 22 and the wall portion 21 to support the column 22 at a predetermined position in the inner cavity 24 .

[0099] The lower vehicle body 1 provided in the embodiment of the present application and the longitudinal beam 20 adopt the above-mentioned structural form, which can ensure its strength while meeting the requirements for the arrangement of the first hole 201. At the same time, it can also achieve the effects of economical use, weight reduction and cost reduction.

[0100] As shown in Figures 1 to 7, in some embodiments, along the first direction X, a third hole 122 is provided on the side of the side beam 12 facing the warehouse body 11, and a fourth hole 202 is provided on the longitudinal beam 20 opposite to the third hole 122. The lower body 1 also includes a second connecting member 40, which is inserted into the third hole 122 and the fourth hole 202 and connects the longitudinal beam 20 and the side beam 12.

[0101] The third hole 122 may be a circular hole, an elliptical hole, or a polygonal hole. The shape and radial size of the fourth hole 202 may be the same as or different from the shape and radial size of the third hole 122 .

[0102] The number of third holes 122 can be one or more, and the number of fourth holes 202 can be equal to the number of third holes 122 and arranged one-to-one. Of course, to ensure connection requirements, the number of one of the third holes 122 and the fourth holes 202 can be greater than the other to achieve redundant hole arrangement.

[0103] The second connecting member 40 may include but is not limited to connecting structures such as bolts, rivets, etc. The first connecting member 30 may be inserted into each set of the third holes 122 and the fourth holes 202 that are arranged opposite to each other.

[0104] The lower vehicle body 1 provided in the embodiment of the present application is provided with a third hole 122 extending along the first direction X on the longitudinal beam 20, and a fourth hole 202 corresponding to the third hole 122 is provided on the side beam 12. By utilizing the second connecting member 40, a reinforced connection between the longitudinal beam 20 and the side beam 12 can be achieved. There is no need to add a new adapter such as a threshold beam to serve as a transition between the two. A reinforced connection between the longitudinal beam 20 and the side beam 12 can be achieved, thereby ensuring the reliability and sealing of the connection between the two.

[0105] In some optional embodiments, the lower vehicle body 1 provided in the embodiments of the present application has a plurality of third holes 122 and a plurality of fourth holes 202 , and the third holes 122 and the fourth holes 202 are arranged one-to-one, and a second connecting member 40 is provided in each group of relatively arranged third holes 122 and fourth holes 202 .

[0106] The number of the third holes 122 and the number of the fourth holes 202 can both be two, three or more.

[0107] The distribution pattern of the third holes 122 may be the same as the distribution pattern of the fourth holes 202 .

[0108] The plurality of third holes 122 may be spaced apart along the same direction. Of course, some of the plurality of third holes 122 may be spaced apart along the second direction Y and some may be spaced apart along the third direction Z.

[0109] The lower vehicle body 1 provided in the embodiment of the present application has multiple third holes 122 and one-to-one arrangement of the fourth holes 202 , thereby further enabling multi-point connection between the longitudinal beam 20 and the side beam 12 , thereby improving the connection strength between the two.

[0110] In some optional embodiments, the lower vehicle body 1 provided in the embodiments of the present application further includes a first colloid 50 , and the first colloid 50 is provided at the connection between the second connecting member 40 and the longitudinal beam 20 , and the first colloid 50 closes the gap between the second connecting member 40 and the hole wall of the fourth hole 202 .

[0111] The first colloid 50 may be an adhesive that is fluid in an initial state and curable at a preset temperature, for example, PVC glue or the like.

[0112] The first colloid 50 may be disposed around the outer circumference of the second connecting member 40 and may partially fill the gap between the second connecting member 40 and the wall of the fourth hole 202 .

[0113] The fourth hole 202 may be provided with the wall 21 of the longitudinal beam 20 , and the first colloid 50 may be partially laminated on the wall 21 of the longitudinal beam 20 facing the inner cavity 24 and close the gap between the second connector 40 and the hole wall of the fourth hole 202 .

[0114] The lower vehicle body 1 provided in the embodiment of the present application, by including the first colloid 50, can seal the gap formed between the fourth hole 202 of the longitudinal beam 20 starting from the side close to the compartment body 11 and the second connecting member 40, thereby ensuring the sealing of the longitudinal beam 20. When the battery 2 is placed in the compartment body 11, the sealing performance of the battery 2 can be guaranteed.

[0115] In some optional embodiments, the longitudinal beam 20 is welded to the side beam 12 on at least one side in the third direction Z, and the third direction Z intersects with the first direction X and the second direction Y.

[0116] The longitudinal beam 20 can be welded to the side beam 12 on one side in the third direction Z. Of course, the longitudinal beam 20 can also be welded to the side beam 12 on both sides in the third direction Z.

[0117] The third direction Z can be perpendicular to the first direction X and the second direction Y in pairs, that is, the angle between any two directions can be 90°. Of course, it is not limited to being perpendicular, and the angle between any two directions can also be greater than or less than 90°.

[0118] The lower vehicle body 1 provided by the present application can improve the connection strength between the longitudinal beam 20 and the side beam 12 by welding the longitudinal beam 20 to the side beam 12 on at least one side in the third direction Z. At the same time, the welding method can improve the sealing at the joint between the side beam 12 and the longitudinal beam 20, thereby improving the safety performance of the lower vehicle body 1.

[0119] Continuing to refer to Figures 1 to 8, in some embodiments, the longitudinal beam 20 includes a first matching portion 20a and a second matching portion 20b that are intersectingly arranged. The first matching portion 20a is stacked and welded with the side beam 12 in the third direction Z. The first matching portion 20a and the side beam 12 are connected by a first welded body 80 formed by welding. The second matching portion 20b is clamped between the side beam 12 and the bin body 11 and is welded to the side beam 12 on the side of the third direction Z away from the first matching portion 20a. The second matching portion 20b and the side beam 12 are connected by a second welded body 90 formed by welding.

[0120] The intersection angle between the first matching portion 20a and the second matching portion 20b may be equal to 90°, and of course, may also be greater than or less than 90°.

[0121] The first matching portion 20a and the second matching portion 20b may be intersected at one end and extend in a direction away from the intersecting position at the other end.

[0122] The lower vehicle body 1 provided in the embodiment of the present application has a longitudinal beam 20 adopting the above-mentioned structural form, so that it can be distributed and connected to the side beam 12 by welding through the first matching portion 20a and the second matching portion 20b, thereby ensuring the connection strength between the two.

[0123] Optionally, the surfaces of the first and second mating portions 20a, 20b facing the side beam 12 can be flat and perpendicular to each other, allowing for a right-angled notch to be formed on the longitudinal beam 20. The side beam 12 can be positioned within the right-angled notch and welded to the first and second mating portions 20a, 20b, respectively. This ensures connection strength and facilitates assembly and positioning between the longitudinal beam 20 and the side beam 12.

[0124] Optionally, the first matching portion 20 a may extend along the first direction X, and a side of the first matching portion 20 a in the first direction X away from the second matching portion 20 b may be welded to the side beam 12 .

[0125] Optionally, the second matching portion 20 b may extend along the third direction Z, and a side of the second matching portion 20 b in the third direction Z away from the first matching portion 20 a may be welded to the side beam 12 .

[0126] As shown in FIG6 to FIG8 , in some embodiments, the lower vehicle body 1 further includes a second colloid 60 , and the second colloid 60 is provided at the joint between the first matching portion 20 a and the side beam 12 on the side facing away from the compartment body 11 in the first direction X.

[0127] The second colloid 60 may be an adhesive that is fluid in an initial state and curable at a preset temperature, for example, PVC glue or the like.

[0128] The second colloid 60 may at least partially fill a joint formed between the first matching portion 20 a and the side beam 12 on a side facing away from the bin body 11 in the first direction X.

[0129] The lower vehicle body 1 provided in the embodiment of the present application is capable of ensuring the connection strength between the longitudinal beam 20 and the side beam 12 and improving the integrity and sealing between the two by providing a second colloid 60 at the joint between the first matching portion 20a and the side beam 12 on the side away from the compartment body 11 in the first direction X.

[0130] In some embodiments, a second adhesive 60 is provided at a joint between the second matching portion 20 b and the side beam 12 on a side facing away from the first matching portion 20 a in the third direction Z.

[0131] The second colloid 60 may at least partially fill a joint formed between the side of the second matching portion 20 b facing away from the first matching portion 20 a in the third direction Z and the side beam 12 .

[0132] The lower vehicle body 1 provided in the embodiment of the present application can effectively ensure the connection strength between the longitudinal beam 20 and the side beam 12, and improve the integrity and sealing between the two, by providing a second colloid 60 at the joint between the second matching portion 20b and the side beam 12 on the side away from the first matching portion 20a in the third direction Z.

[0133] Along the second direction Y, the welded body between the longitudinal beam 20 and the side beam 12 and the second colloid 60 can be arranged successively in the second direction Y to ensure the sealing of the gap formed between the longitudinal beam 20 and the side beam 12 .

[0134] As shown in FIG. 4 to FIG. 8 , in some embodiments, the lower vehicle body 1 provided in the embodiments of the present application further includes a third colloid 70 . Along the first direction X, the third colloid 70 is bonded between the longitudinal beam 20 and the side beam 12 .

[0135] The third colloid 70 may be in a strip shape or a planar shape.

[0136] The third colloid 70 may be in the form of a colloid with high bonding strength, such as structural adhesive.

[0137] The undercarriage 1 provided in the embodiment of the present application ensures the integrity and connection strength between the longitudinal beam 20 and the side beam 12 by disposing the third colloid 70 between the longitudinal beam 20 and the side beam 12. Furthermore, the provision of the third colloid 70 ensures the sealing between the longitudinal beam 20 and the side beam 12, reducing the gap between the two and improving the sealing performance.

[0138] The lower vehicle body 1 provided in the embodiment of the present application includes a chemical chamber 10, a longitudinal beam 20, a first connecting member 30, a second connecting member 40, a first colloid 50, a second colloid 60 and a third colloid. The chemical chamber 10 includes a chamber body 11 and a side beam 12. The chamber body 11 is connected to the side beams 12 on both sides of the first direction X. The side beams 12 extend along the second direction Y. The first direction X and the second direction Y are arranged perpendicularly. The chemical chamber 10 is provided with longitudinal beams 20 on both sides of the first direction X. The longitudinal beams 20 are provided with a first hole 201 and a fourth hole 202 extending along the first direction X. The side beams 12 are provided with a second hole 121 arranged opposite to the first hole 201 and a third hole 122 opposite to the fourth hole 202. The first hole 201 is a through hole and a strip hole, and the second hole 121 is a blind hole. The first connecting member 30 is inserted into the first hole 201 and the second hole 121 and is connected to the threads of the longitudinal beam 20 and the side beam 12. There are multiple first holes 201 and multiple second holes 121, each of which is arranged one-to-one. Each pair of opposing first holes 201 and second holes 121 is provided with a first connector 30. The longitudinal beam 20 includes a wall portion 21 enclosing an inner cavity 24, a column 22 positioned within the inner cavity 24, and a reinforcing rib 23 connecting the column 22 and the wall portion 21. The first holes 201 are provided in the column 22.

[0139] The second connector 40 is inserted into the third hole 122 and the fourth hole 202 and connects the longitudinal beam 20 to the side beam 12. There are multiple third holes 122 and fourth holes 202, and the third holes 122 and fourth holes 202 are arranged one-to-one. Each pair of opposing third holes 122 and fourth holes 202 is provided with a second connector 40. A first adhesive 50 is provided at the connection between the second connector 40 and the longitudinal beam 20, closing the gap between the second connector 40 and the wall of the fourth hole 202. The longitudinal beam 20 is welded to the side beam 12 on one side in the third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y. The longitudinal beam 20 includes a first mating portion 20a and a second mating portion 20b, which intersect each other. The first mating portion 20a is stacked and welded to the side beam 12 in the third direction Z. The second mating portion 20b is sandwiched between the side beam 12 and the tank body 11 and welded to the side beam 12 on the side facing away from the first mating portion 20a in the third direction Z. A second adhesive 60 is provided at the joint between the first mating portion 20a and the side beam 12 on the side facing away from the tank body 11 in the first direction X. The second mating portion 20b is also provided at the joint between the side beam 12 and the side beam 12 on the side facing away from the first mating portion 20a in the third direction Z. The third adhesive is bonded between the longitudinal beam 20 and the side beam 12 along the first direction X.

[0140] 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 provided in the above embodiments and a battery 2, the battery 2 being disposed in a chemical chamber 10. The battery 2 may comprise at least one battery cell 2a, and may optionally comprise a plurality of battery cells 2a.

[0141] 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. Since the longitudinal beam 20 and the side beam 12 are fitted and connected to each other, there is no need for a direct connection between the two, and no need for an interval setting and connection through an adapter. Therefore, the lower vehicle body 1 can reduce space waste under the same size and provide a larger occupied space for the chemical warehouse 10.

[0142] 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 .

[0143] 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. By making the longitudinal beam 20 and the side beam 12 fit together and connect to each other, there is no need for a direct connection between the two, and no need for an interval setting and connection through an adapter. This allows the lower body 1 to reduce space waste under the same size and provide a larger occupied space for the chemical warehouse 10.

[0144] 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: A chemical chamber, comprising a chamber body and side beams, wherein the chamber body is connected to the side beams on both sides of a first direction, the side beams extend along a second direction, and the first direction and the second direction are arranged to intersect; A longitudinal beam is provided on at least one side of the chemical chamber in the first direction, and the longitudinal beam is fitted with and connected to the side beam.

2. The undercarriage according to claim 1, wherein: The longitudinal beam is provided with a first hole extending along the first direction, the side beam is provided with a second hole arranged opposite to the first hole, and the lower body includes a first connecting member, which is inserted into the first hole and the second hole and connects the longitudinal beam with the side beam.

3. The undercarriage according to claim 2, wherein: The first hole is a through hole, the second hole is a blind hole, and the first connecting member is threadedly connected to at least one of the longitudinal beam and the side beam.

4. The undercarriage according to claim 2 or 3, wherein: The first hole is a strip-shaped hole and its length direction is parallel to the second direction. 5 . The lower vehicle body according to claim 2 , wherein the longitudinal beam is further provided with an avoidance gap, and the avoidance gap is provided around the first hole.

6. The undercarriage according to any one of claims 2 to 5, wherein: The number of the first holes and the number of the second holes are both multiple, the first holes and the second holes are arranged one by one, and the first connecting member is arranged in each group of the first holes and the second holes that are arranged opposite to each other.

7. The undercarriage according to any one of claims 1 to 6, wherein: The longitudinal beam includes a wall portion enclosing an inner cavity, a column located in the inner cavity, and reinforcing ribs connecting the column and the wall portion, and the first hole is arranged in the column.

8. The undercarriage according to any one of claims 1 to 7, wherein: Along the first direction, a third hole is provided on the side of the side beam facing the warehouse body, and a fourth hole is provided on the longitudinal beam opposite to the third hole. The lower vehicle body also includes a second connecting member, which is inserted into the third hole and the fourth hole and connects the longitudinal beam and the side beam.

9. The undercarriage according to claim 8, wherein: The number of the third holes and the number of the fourth holes are both multiple, the third holes and the fourth holes are arranged one to one, and the second connecting member is arranged in each group of the third holes and the fourth holes that are arranged relatively to each other.

10. The undercarriage according to claim 8 or 9, wherein: The lower vehicle body further includes a first colloid, and the first colloid is disposed at the connection between the second connecting member and the longitudinal beam, and the first colloid closes the gap between the second connecting member and the hole wall of the fourth hole.

11. The undercarriage according to any one of claims 1 to 10, wherein: The longitudinal beam is welded to the side beam on at least one side in a third direction, and the third direction intersects with the first direction and the second direction.

12. The undercarriage according to claim 11, wherein: The longitudinal beam includes a first matching portion and a second matching portion that are intersectingly arranged, the first matching portion being stacked and welded with the side beam in the third direction, and the second matching portion being clamped between the side beam and the bin body and welded to the side beam on the side away from the first matching portion in the third direction.

13. The undercarriage according to claim 11 or 12, wherein: The lower vehicle body also includes a second colloid, and the second colloid is arranged at a joint between the first matching portion and the side beam on a side away from the bin body in the first direction, and / or the second matching portion is arranged at a joint between the second matching portion and the side beam on a side away from the first matching portion in the third direction.

14. The undercarriage according to any one of claims 1 to 13, wherein: The lower vehicle body further includes a third colloid, and along the first direction, the third colloid is bonded between the longitudinal beam and the side beam.

15. A chassis comprising: The undercarriage according to any one of claims 1 to 14; The battery is arranged in the chemical chamber.

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

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