Vehicle-mounted battery box bottom support assembly and vehicle

Abstract

The invention relates to the technical field of vehicle-mounted battery boxes, in particular to a vehicle-mounted battery box bottom support assembly and a vehicle. The vehicle-mounted battery box bottom support assembly comprises a vehicle-mounted bottom support and a first connecting part. The vehicle-mounted bottom support has a length direction, a width direction and a height direction. In the first connecting part, a first connecting seat is fixedly connected with the vehicle-mounted bottom support; the first connecting seat, the first elastic piece and the second connecting seat are detachably connected in sequence through a first locking piece; the second connecting seat is detachably connected with a girder assembly of the vehicle; an included angle between the length direction of the first elastic piece and the width direction of the vehicle-mounted bottom support is a buffer angle; the buffer angle is larger than 0 degree and smaller than or equal to 90 degrees; the length direction of the first elastic piece is perpendicular to the length direction of the vehicle-mounted bottom support. A plurality of first connecting parts form a group; the multiple sets of first connecting parts are arranged at intervals in the width direction of the vehicle-mounted bottom support. In this way, the problems that the comprehensive shock resistance and cushioning capacity of the connecting portion of the vehicle-mounted bottom support and the vehicle girder is poor, and cracks are prone to being generated are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted battery boxes, and more specifically, to a vehicle-mounted battery box bottom support assembly and a vehicle. Background Art

[0002] In the existing vehicle structure, the body girder is rigidly connected to the battery box bottom support through a welding process, and the two together form a load-bearing framework for the power battery system. The girder, as the main load-bearing component, is made of high-strength steel. Its longitudinally extending structure cooperates with the transverse reinforcing ribs to form a three-dimensional support system for dispersing the vertical load, transverse bending stress, and longitudinal impact force generated during driving. The bottom support assembly is fixed to the top surface of the girder through continuous welds. The welds adopt a multi-layer surfacing process to achieve interface fusion, and its microscopic crystal phase structure can maintain structural integrity under static loads. In the existing design, local reinforcing plates are provided at the joint between the bottom support and the girder to increase the compressive strength by increasing the weld cross-sectional area. At the same time, a bending and flanging structure is arranged at the edge of the bottom support, intending to absorb part of the impact energy through geometric deformation. This technical solution can meet the battery box fixing requirements under normal working conditions and verify the static load-bearing capacity through finite element analysis.

[0003] The root cause of the existing technical problems lies in the insufficient adaptability of the rigid connection system to dynamic impacts. When the vehicle encounters combined loads during driving, the girder undergoes multi-dimensional deformation due to road bumps, emergency braking, or side collisions. At this time, the bottom support connection part needs to simultaneously bear the combined stresses of tension, shear, and torsion. Since the ductility of the weld metal is lower than that of the base metal, and the reinforcing plate can only improve the compressive strength in the vertical direction, the stress concentration area shifts towards the weld edge. Under the action of cyclic alternating loads, stress concentration points gradually form micro-cracks and expand along the grain boundaries, eventually leading to structural failure. The key problem can be summarized as: the rigid connection system between the bottom support and the girder lacks an effective stress buffering mechanism. Summary of the Invention

[0004] To solve the problem that the comprehensive anti-impact and shock-absorbing ability of the connection part between the vehicle-mounted bottom support and the vehicle girder is poor and cracks are easily generated, the present invention provides a vehicle-mounted battery box bottom support assembly and a vehicle.

[0005] In a first aspect, the present invention provides a vehicle-mounted battery box bottom support assembly, and the vehicle-mounted battery box bottom support assembly includes:

[0006] A vehicle-mounted bottom support, the vehicle-mounted bottom support having a length direction, a width direction, and a height direction;

[0007] The first connecting part, the first connecting part includes a first connecting seat, a first elastic member, a second connecting seat and a first locking member; the first connecting seat is fixedly connected to the vehicle-mounted bottom bracket; there is a spacing between the first connecting seat and the second connecting seat; the first elastic member is clamped between the first connecting seat and the second connecting seat; the first connecting seat, the first elastic member and the second connecting seat are detachably connected by the first locking member; the second connecting seat is used for detachably connecting to the vehicle frame assembly; the included angle between the length direction of the first elastic member and the width direction of the vehicle-mounted bottom bracket is a buffer angle; the buffer angle is greater than 0°; the buffer angle is less than or equal to 90°; the length direction of the first elastic member is perpendicular to the length direction of the vehicle-mounted bottom bracket;

[0008] Wherein, several of the first connecting parts are in a group; there are multiple groups of the first connecting parts; multiple groups of the first connecting parts are arranged at intervals along the width direction of the vehicle-mounted bottom bracket.

[0009] In some embodiments, the length direction of the first elastic member of one group of the first connecting parts intersects with the length direction of the first elastic member of another group of the first connecting parts, and the intersection point is located on one side of the height direction of the vehicle-mounted bottom bracket, and the other side of the height direction of the vehicle-mounted bottom bracket is used for detachably connecting to the vehicle frame assembly; the buffer angle of one group of the first connecting parts is a first included angle; the buffer angle of another group of the first connecting parts is a second included angle; the first included angle is less than the second included angle.

[0010] In some embodiments, the first elastic member includes a coaxial first elastic sleeve, a first elastic ring and a second elastic ring; the length direction of the first elastic member is the axial direction of the first elastic sleeve; the first elastic sleeve passes through the inside of the first elastic ring and the second elastic ring; there is a first limiting ring groove between the first elastic ring and the second elastic ring; the first elastic ring is integrally formed with the first elastic sleeve; the second elastic ring is integrally formed with the first elastic sleeve; the second connecting seat is embedded in the first limiting ring groove; the first elastic ring is squeezed between the first connecting seat and the second connecting seat; the first elastic ring and the second elastic ring clamp the second connecting seat; the first locking member passes through the inside of the first elastic sleeve.

[0011] In some embodiments, in the first connecting part corresponding to the first included angle, the axial dimension of the first elastic ring is greater than the axial dimension of the second elastic ring; in the first connecting part corresponding to the second included angle, the axial dimension of the first elastic ring is less than the axial dimension of the second elastic ring.

[0012] In some embodiments, the vehicle-mounted battery box bottom support assembly further includes a second connecting portion; the second connecting portion includes a third connecting seat, a second elastic member, a fourth connecting seat, and a second locking member; the third connecting seat is fixedly connected to the vehicle-mounted bottom support; the fourth connecting seat is used for connecting the frame assembly; the second elastic member is fixed between the third connecting seat and the fourth connecting seat through the second locking member;

[0013] The second connecting portion is located between multiple groups of the first connecting portions; the third connecting portion is located at the middle position in the width direction of the vehicle-mounted bottom support.

[0014] In some embodiments, the maximum compression amount of the second elastic member along the height direction of the vehicle-mounted bottom support is less than the maximum compression amount of the first elastic member along its own length direction.

[0015] In some embodiments, the fourth connecting seat is a support shaft; the support shaft is parallel to the length direction of the vehicle-mounted bottom support; the second elastic member is in a cylindrical shape; the second elastic member is coaxial with the support shaft; the second elastic member is sleeved on the support shaft; the second elastic member is detachably connected to the support shaft through the second locking member; the third connecting seat is sleeved on the outside of the second elastic member; the third connecting seat is rotatably connected to the second elastic member; the axial length of the second elastic member is greater than the radial thickness; the radial thickness of the second elastic member is less than the length of the first elastic member.

[0016] In some embodiments, the second elastic member includes a coaxial second elastic sleeve, a third elastic ring, and a fourth elastic ring; the second elastic sleeve penetrates inside the third elastic ring and the fourth elastic ring; there is a second limiting ring groove between the third elastic ring and the fourth elastic ring; the third elastic ring is integrally formed with the second elastic sleeve; the fourth elastic ring is integrally formed with the second elastic sleeve; the fourth connecting seat is embedded in the second limiting ring groove; the third elastic ring is squeezed between the third connecting seat and the fourth connecting seat; the third elastic ring and the fourth elastic ring clamp the fourth connecting seat; the second locking member passes through the inside of the second elastic sleeve;

[0017] The length direction of the second elastic member is the axial direction of the second elastic sleeve; the length direction of the second elastic member is arranged along the height direction of the vehicle-mounted bottom support; the length of the second elastic member is less than the length of the first elastic member.

[0018] In a second aspect, the present invention provides a vehicle, which includes:

[0019] A body assembly;

[0020] A frame assembly, the frame assembly is detachably connected to the body assembly;

[0021] Wheel assembly, the wheel assembly is rotatably connected to the beam assembly;

[0022] The vehicle-mounted battery box bottom support assembly according to any one of the above embodiments; the second connecting seat of the vehicle-mounted battery box bottom support assembly is detachably connected to the beam assembly; the width direction of the vehicle-mounted bottom support of the vehicle-mounted battery box bottom support assembly is arranged along the length direction of the vehicle body assembly;

[0023] Battery box assembly, the battery box assembly is detachably connected to the vehicle-mounted bottom support of the vehicle-mounted battery box bottom support assembly.

[0024] In some embodiments, the buffer angle of a set of the first connecting portions near the front of the vehicle body assembly is a first included angle; the buffer angle of the first connecting portion near the rear of the vehicle body assembly is a second included angle; the first included angle is smaller than the second included angle.

[0025] To solve the problem that the comprehensive anti-impact and shock-absorbing ability of the connection part between the vehicle-mounted bottom support and the vehicle beam is poor and cracks are likely to occur, the present invention has the following advantages:

[0026] Through multiple sets of first connecting portions arranged at intervals in the width direction of the vehicle-mounted bottom support, the first connecting portion includes a first connecting seat, a second connecting seat detachably connected by a first locking member, and a first elastic member clamped between the two. The length direction of the first elastic member forms a buffer angle greater than 0° and less than or equal to 90° with the width direction of the vehicle-mounted bottom support and is perpendicular to the length direction of the vehicle-mounted bottom support. When the second connecting seat is connected to the vehicle beam assembly, the first elastic member generates multi-directional elastic deformation within the range defined by the buffer angle. This structure decomposes and absorbs the vibration during vehicle driving through the first elastic member under the constraint of the buffer angle, reduces the composite impact load borne by the vehicle-mounted bottom support. At the same time, multiple sets of spaced-apart first connecting portions form a distributed buffer unit, and under the coordinated cooperation of multiple first elastic members, the impact energy is dispersed and transmitted to the beam assembly. Thus, a flexible connection between the vehicle-mounted bottom support and the beam is achieved, effectively suppressing the structural stress concentration of the vehicle-mounted bottom support caused by road surface bumps or sudden acceleration / braking during vehicle driving, and finally improving the anti-impact stability and durability of the vehicle-mounted battery box bottom support assembly under complex working conditions. Description of the Drawings

[0027] Figure 1 Shows an assembly schematic diagram of a vehicle-mounted battery box bottom support assembly, a beam assembly, and a battery box assembly of an embodiment;

[0028] Figure 2 Shows Figure 1 A side view assembly schematic diagram of a vehicle-mounted battery box bottom support assembly, a beam assembly, and a battery box assembly in an embodiment;

[0029] Figure 3 Shows the assembly schematic diagram of the vehicle-mounted battery box bottom support assembly, the girder assembly, and the battery box assembly of another embodiment;

[0030] Figure 4 Shows Figure 3 The side view assembly schematic diagram of the vehicle-mounted battery box bottom support assembly, the girder assembly, and the battery box assembly of one embodiment in

[0031] Figure 5 Shows Figure 3 The side view assembly schematic diagram of the vehicle-mounted battery box bottom support assembly, the girder assembly, and the battery box assembly of another embodiment in

[0032] Figure 6 Shows the schematic diagram of the vehicle-mounted battery box bottom support assembly of one embodiment;

[0033] Figure 7 Shows the schematic diagram of the vehicle-mounted battery box bottom support assembly of another embodiment;

[0034] Figure 8 Shows Figure 6 The side view schematic diagram of the vehicle-mounted battery box bottom support assembly of one embodiment in

[0035] Figure 9 Shows Figure 7 The side view schematic diagram of the vehicle-mounted battery box bottom support assembly of one embodiment in

[0036] Figure 10 Shows Figure 6 The side view schematic diagram of the vehicle-mounted battery box bottom support assembly of another embodiment in

[0037] Figure 11 Shows the schematic diagram of the first elastic member of the first connection portion of the vehicle-mounted battery box bottom support assembly of one embodiment;

[0038] Figure 12 Shows the schematic diagram of the second elastic member of the second connection portion of the vehicle-mounted battery box bottom support assembly of one embodiment;

[0039] Figure 13 Shows the schematic diagram of the second connection portion of the vehicle-mounted battery box bottom support assembly of one embodiment in the first perspective;

[0040] Figure 14 Shows Figure 13 The schematic diagram of the second connection portion of the vehicle-mounted battery box bottom support assembly in the second embodiment in the second perspective.

[0041] Reference numerals: 10 vehicle-mounted battery box bottom support assembly; 11 vehicle-mounted bottom support; 12 first connection part; 121 first connection seat; 122 first elastic member; 1221 first elastic sleeve; 1222 first elastic ring; 1223 second elastic ring; 1224 first limiting ring groove; 123 second connection seat; 124 first locking member; 13 second connection part; 131 third connection seat; 132 second elastic member; 1321 second elastic sleeve; 1322 third elastic ring; 1323 fourth elastic ring; 1324 second limiting ring groove; 133 fourth connection seat; 134 second locking member; 20 girder assembly; 21 first girder; 22 second girder; 30 battery box assembly. Detailed implementation manners

[0042] The present disclosure will now be described with reference to several exemplary embodiments. It should be understood that the description of these embodiments is only for enabling those of ordinary skill in the art to better understand and thus implement the present disclosure, rather than implying any limitation to the scope of the present disclosure.

[0043] As used herein, the term "comprising" and its variants are to be construed as open-ended terms meaning "including but not limited to". The term "based on" is to be construed as "at least partially based on". The terms "an embodiment" and "one embodiment" are to be construed as "at least one embodiment". The term "another embodiment" is to be construed as "at least one other embodiment". The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate the orientation or positional relationship, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances. In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality of" is two or more.

[0044] During the driving of the vehicle, the bottom support assembly 10 of the vehicle-mounted battery box bears the combined impact load generated by road surface bumps, rapid acceleration and braking. Among them, the connection structure between the vehicle-mounted bottom support 11 and the girder assembly 20 directly affects the impact resistance performance. In the traditional rigid connection method, the first connection seat 121 and the second connection seat 123 between the vehicle-mounted bottom support 11 and the girder assembly 20 adopt a direct fixed connection form, resulting in the longitudinal impact force generated during vehicle driving being directly transmitted to the girder assembly 20 along the length direction of the vehicle-mounted bottom support 11, while the lateral yaw force and the vertical oscillation force form stress concentration through the connection part. Since the vehicle-mounted bottom support 11 lacks an effective buffer structure in the width direction, the multi-directional impact loads are superimposed on the fixed connection points, which easily causes structural fatigue damage.

[0045] In this embodiment, in order to improve the buffer performance of the vehicle-mounted bottom support 11, this embodiment discloses a bottom support assembly 10 of a vehicle-mounted battery box. AsFigure 6 , Figure 7 As shown in Figure 7 , the vehicle-mounted battery box bottom support assembly 10 may include a vehicle-mounted bottom support 11. The vehicle-mounted bottom support 11 may have a length direction, a width direction, and a height direction. Among them, the width direction of the vehicle-mounted bottom support 11 may be the same as the driving direction of the vehicle; a first connection part 12 may be provided on the vehicle-mounted bottom support 11. As Figure 8 , Figure 9 shown in Figure 8 and Figure 9 , the first connection part 12 may include a first connection seat 121, a first elastic member 122, a second connection seat 123, and a first locking member 124; the first connection seat 121 may be fixedly connected to the vehicle-mounted bottom support 11; there may be a spacing between the first connection seat 121 and the second connection seat 123; the first elastic member 122 may be clamped between the first connection seat 121 and the second connection seat 123; the first connection seat 121, the first elastic member 122, and the second connection seat 123 may be detachably connected by the first locking member 124; the second connection seat 123 may be used for detachably connecting to the vehicle frame assembly 20 of the vehicle; the length direction of the first elastic member 122 may form a buffer angle with the width direction of the vehicle-mounted bottom support 11; the buffer angle may be greater than 0° and less than or equal to 90°; the length direction of the first elastic member 122 may be perpendicular to the length direction of the vehicle-mounted bottom support 11; among them, as Figure 6 , Figure 7 shown in Figure 6 and Figure 7 , several first connection parts 12 may be a group, and multiple groups may be arranged at intervals along the width direction of the vehicle-mounted bottom support 11. By arranging multiple groups of first connection parts 12 at intervals, a plurality of flexible connection points between the vehicle-mounted bottom support 11 and the vehicle frame assembly 20 can be formed in the width direction. Using the inclination angle of the buffer angle greater than 0° and less than or equal to 90°, part of the first elastic member 122 can generate compression in its length direction when loaded, and another part of the first elastic member 122 can generate tension in its length direction when loaded. With the cooperation of each other, the buffering of the vehicle-mounted bottom support 11 can be realized.

[0046] In some other embodiments, one end of the first elastic member 122 may wrap part of the first connection seat 121 or wrap the first locking member 124 detachably connected to the first connection seat 121, and the other end may wrap part of the second connection seat 123. Thus, when the first elastic member 122 is loaded, it can generate both compression deformation in the length direction and horizontal lateral deflection deformation, so as to disperse the impact loads in different directions and achieve the effect of multi-directional buffering of the vehicle-mounted bottom support 11.

[0047] In this embodiment, as Figure 9 , Figure 10As shown, the length directions of the first elastic members 122 of one group of the first connecting portions 12 may intersect with the length directions of the first elastic members 122 of another group of the first connecting portions 12, and the intersection point may be located on one side in the height direction of the vehicle-mounted bottom bracket 11, and the other side may be used to connect with the girder assembly 20; by arranging the first elastic members 122 obliquely and having an intersection point in the length direction between the two groups of first elastic members 122, when the first elastic members 122 are loaded, compression or tensile deformation in their own length directions is generated, and both sides of the vehicle-mounted bottom bracket 11 in its width direction can be buffered, so as to cope with impacts and shock absorption in multiple directions such as vehicle starting, accelerating, decelerating, and braking, and improve the buffering effect of the first connecting portion 12 in multiple directions. The buffer angle of one group of the first connecting portions 12 may be the first included angle, and the other group may be the second included angle, and the first included angle may be smaller than the second included angle. Compared with working conditions such as vehicle starting and accelerating, the impact force borne by the vehicle-mounted bottom bracket 11 during the vehicle braking condition is greater and more frequent. By arranging two groups of first connecting portions 12 with different buffer angles, during the vehicle braking condition, the first connecting portion 12 close to the vehicle head bears a greater compression load, while the first connecting portion 12 close to the vehicle tail bears a tensile load. Since the second included angle is greater than the first included angle, the first included angle may be the first connecting portion 12 corresponding to the vehicle head, and the second included angle may be the first connecting portion 12 corresponding to the vehicle tail. Such an arrangement can make the direction of the tensile load form a certain angle with the first elastic member 122 close to the vehicle tail, so that the first elastic member 122 close to the vehicle tail has a larger deformation space for tensile deformation. Through the differential configuration of the inclination angles of the first elastic members 122, the longitudinal impact energy generated during braking can be effectively absorbed, and the yaw amplitude of the battery box can be reduced.

[0048] In this embodiment, as Figure 11As shown, the first elastic member 122 may include a coaxial first elastic sleeve 1221, a first elastic ring 1222, and a second elastic ring 1223; the length direction of the first elastic member 122 may be the axial direction of the first elastic sleeve 1221; the first elastic sleeve 1221 may be disposed inside the first elastic ring 1222 and the second elastic ring 1223; a first limiting ring groove 1224 may be formed between the first elastic ring 1222 and the second elastic ring 1223; the first elastic ring 1222 and the first elastic sleeve 1221 may be integrally formed; the second connecting seat 123 may be embedded in the first limiting ring groove 1224, and at this time, the second connecting seat 123 may be sleeved on the first elastic sleeve 1221, facilitating the positioning and fixing of the second connecting seat 123; the first elastic ring 1222 may be squeezed between the first connecting seat 121 and the second connecting seat 123; the first elastic ring 1222 and the second elastic ring 1223 may clamp the second connecting seat 123; the first locking member 124 may pass through the inside of the first elastic sleeve 1221. By the structure of the first limiting ring groove 1224, the displacement range of the second connecting seat 123 is restricted, and the axial compression deformation of the first elastic ring 1222 and the second elastic ring 1223 is utilized to absorb the impact load. At the same time, the first elastic sleeve 1221 provides radial constraint, avoiding the separation of the second connecting seat 123 and enabling the first elastic member 122 to maintain a stable deformation path during compression and tension, improving the buffering reliability of the connection structure of the first connecting portion 12.

[0049] In this embodiment, in the first connecting portion 12 corresponding to the first included angle, the axial dimension of the first elastic ring 1222 may be greater than the axial dimension of the second elastic ring 1223; in the first connecting portion 12 corresponding to the second included angle, the axial dimension of the first elastic ring 1222 may be less than the axial dimension of the second elastic ring 1223. According to the force characteristics of the first connecting portions 12 at different positions on the vehicle-mounted base 11 under the braking condition, the axial dimension of the first elastic ring 1222 on the compression side is increased to improve the compressive capacity, and at the same time, the axial dimension of the first elastic ring 1222 on the tensile side is increased to extend the tensile stroke. Through the differential structure design, the load characteristics in different directions are matched, and the overall buffering performance is improved.

[0050] In this embodiment, as Figure 4 , Figure 5 , Figure 9 , Figure 10As shown, the vehicle-mounted battery box bottom support assembly 10 may further include a second connection part 13; the second connection part 13 may include a third connection seat 131, a second elastic member 132, a fourth connection seat 133, and a second locking member 134; the third connection seat 131 may be fixedly connected to the vehicle-mounted bottom support 11; the fourth connection seat 133 may be used to connect to the girder assembly 20; the second elastic member 132 may be fixed between the third connection seat 131 and the fourth connection seat 133 through the second locking member 134; the second connection part 13 may be located between multiple groups of first connection parts 12 and may be at the middle position in the width direction of the vehicle-mounted bottom support 11. By arranging the second connection part 13 in the middle, a support fulcrum is added to the vehicle-mounted bottom support 11, which can restrict the swing trajectory of the battery box assembly 30 supported on the vehicle-mounted bottom support 11, causing the first elastic member 122 of the first connection part 12 to form a rotational movement trend around the second connection part 13 when loaded. This can facilitate the design of the included angle between the first included angle and the second included angle, clarify the compression direction of the first elastic member 122, and improve the impact resistance stability of the first connection part 12.

[0051] In some other embodiments, the orientation of the first elastic member 122 corresponding to the first included angle may be the tangential direction with the second connection part 13 as the center of the circle, or the direction towards the mass center of the battery box assembly 30.

[0052] In this embodiment, the maximum compression amount of the second elastic member 132 in the height direction of the vehicle-mounted bottom support 11 may be less than the maximum compression amount of the first elastic member 122 in its own length direction. Since the second connection part 13 serves as a swing fulcrum, its vertical compression amount is converted into the deformation in the inclination direction of the first connection part 12 through trigonometric relations. Controlling the difference in the compression amounts of the first elastic member 122 and the second elastic member 132 can ensure that both the first elastic member 122 and the second elastic member 132 can obtain stable telescopic strokes with trigonometric relations, avoiding the weld cracking of the connection structure between the girder assembly 20 and the vehicle-mounted bottom support 11 due to overload, and ensuring the connection reliability between the girder assembly 20 and the vehicle-mounted bottom support 11.

[0053] In this embodiment, as Figure 13 、 Figure 14As shown, the fourth connecting seat 133 can be a support shaft; the support shaft can be parallel to the length direction of the vehicle-mounted base 11; the second elastic member 132 can be cylindrical and coaxially sleeved with the support shaft; the third connecting seat 131 can be sleeved outside the second elastic member 132 and rotatably connected thereto; the axial length of the second elastic member 132 can be greater than the radial thickness, and the radial thickness can be less than the length of the first elastic member 122. By providing the structure in which the third connecting seat 131 is rotatably connected to the fourth connecting seat 133, when the battery box assembly 30 on the vehicle-mounted base 11 swings back and forth in the vehicle traveling direction, the swinging trajectory of the battery box assembly 30 is easier to control. Thus, different inclination angles of two or more groups of the first elastic members 122 can be designed, and the maximum buffering effect under the emergency braking condition with the greatest impact can be achieved. By designing the radial thickness of the second elastic member 132, the second elastic member 132 not only meets the support stiffness requirement at the fulcrum of the vehicle-mounted base 11, but also allows the second elastic member 132 to generate a small radial deformation to absorb vibration. The thin-walled cylindrical structure reduces the vertical compression amount while ensuring the support stiffness, achieving the synergistic effect of fulcrum positioning and flexible buffering.

[0054] In this embodiment, as Figure 12 shown, the second elastic member 132 can include a coaxial second elastic sleeve 1321, a third elastic ring 1322, and a fourth elastic ring 1323; the second elastic sleeve 1321 can pass through the inside of the third elastic ring 1322 and the fourth elastic ring 1323; a second limiting ring groove 1324 can be formed between the third elastic ring 1322 and the fourth elastic ring 1323; the fourth connecting seat 133 can be embedded in the second limiting ring groove 1324. At this time, the second elastic sleeve 1321 can play a positioning and fixing role, and the fourth connecting seat 133 can be sleeved on the second elastic sleeve 1321; the third elastic ring 1322 can be pressed between the third connecting seat 131 and the fourth connecting seat 133; the second locking member 134 can pass through the inside of the second elastic sleeve 1321; the length direction of the second elastic member 132 can be set along the height direction of the vehicle-mounted base 11 and the length is less than that of the first elastic member 122. The second connecting portion 13 can adopt the same component structure as the first connecting portion 12. By reducing the axial dimension of the second elastic member 132 to match the low compression amount requirement at the fulcrum position of the vehicle-mounted base 11, different performance parameter settings can be achieved while maintaining the unity of the structural design, reducing the manufacturing complexity and production cost.

[0055] In this embodiment, this embodiment discloses a vehicle. The vehicle can include a vehicle body assembly, a frame assembly 20, a wheel assembly, a battery box assembly 30, and the vehicle-mounted battery box base assembly 10 according to any one of the above embodiments; the frame assembly 20 can be detachably connected to the vehicle body assembly; the wheel assembly can be rotatably connected to the frame assembly 20; as Figure 1As shown, the second connection seat 123 of the vehicle-mounted battery box bracket assembly 10 can be connected to the beam assembly 20; the width direction of the vehicle-mounted bracket 11 can be arranged along the length direction of the vehicle body assembly, that is, the width direction of the vehicle-mounted bracket 11 is the same as the length direction of the beam assembly 20; Figure 2 As shown, the battery box assembly 30 can be detachably connected to the vehicle base 11. By aligning the width direction of the vehicle base 11 with the longitudinal direction of the vehicle body assembly, multiple groups of first connecting parts 12 are arranged in a lateral interval to form a buffer structure perpendicular to the direction of vehicle travel. Combined with the fulcrum effect of the second connecting part 13, the multi-directional impact load generated during vehicle acceleration, braking and steering is effectively absorbed to protect the safety of the battery box structure.

[0056] In other embodiments, Figure 3 As shown, the beam assembly 20 may include a first beam 21 and a second beam 22 ; the first beam 21 and the second beam 22 are spaced apart along the length direction of the vehicle-mounted base 11 .

[0057] In this embodiment, the buffer angle of a group of first connecting parts 12 near the front of the vehicle can be a first angle; the buffer angle of a group of first connecting parts 12 near the rear of the vehicle can be a second angle; the first angle can be smaller than the second angle. According to the direction characteristics of the inertial load when the vehicle is braked, the buffer angle of the first connecting part 12 on the rear side of the vehicle is increased, so that the first elastic member 122 on this side has a larger effective deformation space when subjected to a tensile load. At the same time, a smaller angle is used on the front side to improve the compression buffering capacity. By optimizing the spatial layout to match the load distribution characteristics under different working conditions, the overall shock absorption performance of the system is improved.

[0058] It should be understood that the “present embodiment” mentioned in the present invention is based on the technical points currently described, and multiple “present embodiments” may be the same embodiment or different embodiments.

[0059] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A vehicle-mounted battery box bottom support assembly, characterized in that, The vehicle-mounted battery box bottom support assembly includes: A vehicle-mounted bottom support having a length direction, a width direction, and a height direction; A first connection part, which includes a first connection seat, a first elastic member, a second connection seat, and a first locking member; the first connection seat is fixedly connected to the vehicle-mounted bottom support; there is a spacing between the first connection seat and the second connection seat; the first elastic member is clamped between the first connection seat and the second connection seat; the first connection seat, the first elastic member, and the second connection seat are detachably connected by the first locking member; the second connection seat is used for detachably connecting to the vehicle frame assembly; the included angle between the length direction of the first elastic member and the width direction of the vehicle-mounted bottom support is a buffer angle; the buffer angle is greater than 0°; the buffer angle is less than or equal to 90°; the length direction of the first elastic member is perpendicular to the length direction of the vehicle-mounted bottom support; Among them, several of the first connection parts form a group; there are multiple groups of the first connection parts; the multiple groups of the first connection parts are arranged at intervals along the width direction of the vehicle-mounted bottom support.

2. The vehicle-mounted battery box bottom support assembly according to claim 1, wherein The length directions of the first elastic members of one group of the first connection parts intersect with the length directions of the first elastic members of another group of the first connection parts, and the intersection point is located on one side of the height direction of the vehicle-mounted bottom support, and the other side of the height direction of the vehicle-mounted bottom support is used for detachably connecting to the vehicle frame assembly; the buffer angle of one group of the first connection parts is a first included angle; the buffer angle of another group of the first connection parts is a second included angle; the first included angle is less than the second included angle.

3. The vehicle-mounted battery box bottom support assembly according to claim 2, wherein The first elastic member includes a coaxial first elastic sleeve, a first elastic ring, and a second elastic ring; the length direction of the first elastic member is the axial direction of the first elastic sleeve; the first elastic sleeve passes through the inside of the first elastic ring and the second elastic ring; there is a first limiting ring groove between the first elastic ring and the second elastic ring; the first elastic ring is integrally formed with the first elastic sleeve; the second elastic ring is integrally formed with the first elastic sleeve; the second connection seat is embedded in the first limiting ring groove; the first elastic ring is squeezed between the first connection seat and the second connection seat; the first elastic ring and the second elastic ring clamp the second connection seat; the first locking member passes through the inside of the first elastic sleeve.

4. The vehicle-mounted battery box bottom support assembly according to claim 3, wherein In the first connection part corresponding to the first included angle, the axial dimension of the first elastic ring is greater than the axial dimension of the second elastic ring; in the first connection part corresponding to the second included angle, the axial dimension of the first elastic ring is less than the axial dimension of the second elastic ring.

5. The vehicle-mounted battery box bottom support assembly according to claim 1, wherein The vehicle-mounted battery box bottom support assembly further includes a second connection part; the second connection part includes a third connection seat, a second elastic member, a fourth connection seat and a second locking member; the third connection seat is fixedly connected to the vehicle-mounted bottom support; the fourth connection seat is used for connecting the main beam assembly; the second elastic member is fixed between the third connection seat and the fourth connection seat through the second locking member; The second connection part is located between multiple groups of the first connection parts; the third connection part is located at the middle position in the width direction of the vehicle-mounted bottom support.

6. The vehicle-mounted battery box bottom support assembly according to claim 5, wherein, The maximum compression amount of the second elastic member along the height direction of the vehicle-mounted bottom support is less than the maximum compression amount of the first elastic member along its own length direction.

7. The vehicle-mounted battery box bottom support assembly according to claim 6, wherein, The fourth connection seat is a support shaft; the support shaft is parallel to the length direction of the vehicle-mounted bottom support; the second elastic member is in a cylindrical shape; the second elastic member is coaxial with the support shaft; the second elastic member is sleeved on the support shaft; the second elastic member is detachably connected to the support shaft through the second locking member; the third connection seat is sleeved on the outside of the second elastic member; the third connection seat is rotatably connected to the second elastic member; the axial length of the second elastic member is greater than the radial thickness; the radial thickness of the second elastic member is less than the length of the first elastic member.

8. The vehicle-mounted battery box bottom support assembly according to claim 6, wherein, The second elastic member includes a coaxial second elastic sleeve, a third elastic ring and a fourth elastic ring; the second elastic sleeve passes through the inside of the third elastic ring and the fourth elastic ring; there is a second limiting ring groove between the third elastic ring and the fourth elastic ring; the third elastic ring is integrally formed with the second elastic sleeve; the fourth elastic ring is integrally formed with the second elastic sleeve; the fourth connection seat is embedded in the second limiting ring groove; the third elastic ring is pressed between the third connection seat and the fourth connection seat; the third elastic ring and the fourth elastic ring clamp the fourth connection seat; the second locking member passes through the inside of the second elastic sleeve; The length direction of the second elastic member is the axial direction of the second elastic sleeve; the length direction of the second elastic member is arranged along the height direction of the vehicle-mounted bottom support; the length of the second elastic member is less than the length of the first elastic member.

9. A vehicle, wherein, The vehicle includes: A body assembly; A main beam assembly, the main beam assembly is detachably connected to the body assembly; A wheel assembly, the wheel assembly is rotatably connected to the main beam assembly; The vehicle-mounted battery box bottom support assembly according to any one of claims 1-8; the second connection seat of the vehicle-mounted battery box bottom support assembly is detachably connected to the main beam assembly; the width direction of the vehicle-mounted bottom support of the vehicle-mounted battery box bottom support assembly is arranged along the length direction of the body assembly; A battery box assembly, the battery box assembly is detachably connected to the vehicle-mounted bottom support of the vehicle-mounted battery box bottom support assembly.

10. A vehicle according to claim 9, wherein a buffer angle of a set of the first connecting portions at the front of the vehicle body assembly is a first included angle; a buffer angle of the first connecting portion at the rear of the vehicle body assembly is a second included angle; and the first included angle is smaller than the second included angle.

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