An integrated lightweight vehicle frame flat floor section assembly structure

Abstract

The present invention discloses an integrated lightweight vehicle frame flat floor section assembly structure, which includes a floor main body formed by splicing a plurality of floor profiles, a first connecting member disposed on the left and right sides of the floor main body and connecting the floor profiles and the side wall frame, a second connecting member disposed at the front and rear ends of the floor main body and connecting the floor profiles and the front and rear section vehicle frame structures, and a fastening cover plate for fastening two adjacent floor profiles together; buckle structure plates are provided on both sides of the floor profiles, and a second buckle portion capable of buckling the buckle structure plates on two adjacent floor profiles together is provided on the fastening cover plate; a third buckle portion for cooperating with the buckle structure plate to achieve clamping connection is provided on the first connecting member. The present invention can achieve rapid integrated assembly, is convenient to assemble, has high overall strength, and realizes lightweight design.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive floor assemblies, and particularly to an integrated lightweight frame flat floor section assembly structure.

Background Art

[0002] As is well known, electric vehicles have entered a period of rapid development. However, due to the limitation of battery energy density, the weight of the battery pack has been unable to be reduced for a long time. Therefore, the lightweighting of electric vehicles is extremely urgent. Most of the floors of existing passenger cars use plywood or bamboo plywood. Especially for the middle flat floor with a large size and area, the weight accounts for a relatively large proportion, seriously hindering the lightweighting of the whole vehicle. In the prior art, the middle flat floor is generally erected on the bottom support frame, and the assembly process is cumbersome, requiring a large number of bolt connections or riveting, or even welding. The assembly efficiency is low, and it brings difficulties to the manufacturing process of the floor profiles, increasing the process complexity.

[0003] Therefore, it is necessary to provide a new integrated lightweight frame flat floor section assembly structure to solve the above problems.

Summary of the Invention

[0004] The main object of the present invention is to provide an integrated lightweight frame flat floor section assembly structure, which can achieve rapid integrated assembly, is convenient to assemble, has high overall strength, and realizes lightweight design.

[0005] The present invention realizes the above object through the following technical solutions: An integrated lightweight frame flat floor section assembly structure, which includes a floor main body formed by splicing a plurality of floor profiles, a first connecting member arranged on the left and right sides of the floor main body and connecting the floor profiles and the side wall frame, a second connecting member arranged at the front and rear ends of the floor main body and connecting the floor profiles and the front and rear section frame structures, and a snap-on cover plate for snap-connecting two adjacent floor profiles; snap structure plates are arranged on both sides of the floor profile, and a second snap portion for snap-connecting the snap structure plates on two adjacent floor profiles is arranged on the snap-on cover plate; a third snap portion for cooperating with the snap structure plate to realize snap connection is arranged on the first connecting member.

[0006] Further, the floor profile includes a first rectangular frame plate with a first hollow cavity formed inside, the snap structure plates located on both sides of the first rectangular frame plate, and bottom support portions extending downward on both sides of the first rectangular frame plate.

[0007] Further, the bottom support portion includes a second hollow cavity and a bottom mounting seat for supporting the second hollow cavity.

[0008] Further, lightweight foam filling plates are filled in the first hollow cavity and the second hollow cavity.

[0009] Furthermore, the bottom mounting seat is provided with a mounting groove which opens inwards and is used to receive and fix the T-bolt.

[0010] Furthermore, the bottom mounting seats of two adjacent floor profiles are arranged close to each other and are connected together by rivets or bolts.

[0011] Furthermore, the first connecting member includes a profile body provided with a T-bolt receiving groove, and the third buckle portion provided at the bottom of the profile body.

[0012] Furthermore, the second connecting member includes a second rectangular frame plate, a first connecting plate surface extending horizontally outward from one side plate surface of the second rectangular frame plate and inserted into the first hollow cavity and abutting against the first surface of the first rectangular frame plate, a second connecting plate surface inserted into the first hollow cavity and abutting against the second surface of the first rectangular frame plate, and a vertical connecting plate connecting the second connecting plate surface and the second rectangular frame plate.

[0013] Furthermore, a nut plate is provided in the inner cavity of the second rectangular frame plate, and a pressing boss for pressing the nut plate is provided on the inner cavity wall surface of the second rectangular frame plate.

[0014] Furthermore, a plurality of transverse support beams are provided on the floor body, and the transverse support beams on the same straight line are divided into a plurality of sections, and each section of the transverse support beam is arranged corresponding to the floor profile; the two ends of each section of the transverse support beam abut against the two relative inner surfaces of the bottom mounting seat in the floor profile; T-bolt mounting grooves are provided on the front and rear side surfaces of the transverse support beam, and the transverse support beam and the bottom mounting seat are fixedly connected together by L-shaped angle connectors and T-bolts.

[0015] Compared with the prior art, the integrated lightweight frame flat floor section assembly structure of the present invention has the following beneficial effects:

[0016] 1) The floor profile has its own bottom support structure, eliminating the need for additional support components, reducing assembly steps, the number of components, and the overall weight;

[0017] 2) The floor profile adopts an internal hollow structure, which achieves a lightweight design while meeting the strength requirements, and heat preservation and noise reduction materials are arranged in the hollow cavity to achieve the heat preservation and noise reduction functions;

[0018] 3) The two sides of the floor profile are provided with a snap-on structure, which cooperates with the snap-on cover plate to realize the snap-on assembly of the floor, reducing the process operation of bolt connection and eliminating the need for the original punching process in the bolt connection, reducing the process difficulty, making the assembly between floor profiles more convenient and efficient, and improving the assembly efficiency;

[0019] 4) The first connecting pieces are installed on the left and right sides of the floor profile by means of a clamping connection. The first connecting pieces are provided with T-bolt installation slots, which cooperate with the T-bolt installation slots at the bottom of the floor profile. The upper and lower parts of the floor assembly are firmly fixed and connected with the side frame by means of structural rivets. The installation is convenient and efficient, which greatly improves the connection efficiency and convenience of the floor assembly in the middle section of the frame and the side frame.

[0020] 5) The front and rear ends of the floor profile are installed with a second connecting piece by bolt connection, riveting, bonding or welding, and the nut plate embedded in the second connecting piece can quickly realize the quick connection with the front and rear sections of the frame, which greatly facilitates the connection and assembly of the middle section of the frame and the front and rear sections of the frame, and improves the assembly efficiency;

[0021] 6) The floor profile has its own bottom support structure. The floor assembly formed by the transverse support beam arranged at the bottom support structure can be directly used as the middle section of the frame, and is directly connected to the front and rear section structures and the side frame of the frame. There is no need to set up an additional middle section of the frame, which greatly reduces the weight of the frame and is of great significance to improving the cruising range of electric vehicles.

Brief Description of the Drawings

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the cross-sectional structure of a floor profile in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the partial structure of one end of a floor profile in an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the buckled cover plate in an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of the connection structure of two adjacent floor profiles in an embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the connection structure of the floor profile, the first connecting member and the side frame in an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the connection structure between the floor profile and the second connecting member in an embodiment of the present invention;

[0029] Figure 8 It is a schematic diagram of the connection structure of the floor profile, the second connecting member and the front and rear section structures of the frame in an embodiment of the present invention;

[0030] Figure 9Schematic diagram of the connection structure of the transverse support beam at the bottom of the floor profile in the embodiment of the present invention;

[0031] The numbers in the figure represent:

[0032] 100 Integrated lightweight vehicle frame flat floor section assembly structure; 101 Side wall skeleton; 102 Front and rear section vehicle frame structures; 103 First surface; 104 Second surface;

[0033] 1 Floor profile, 11 First rectangular frame plate, 111 First hollow cavity; 12 Snap structure plate, 121 First support plate, 122 Second support plate, 123 First snap part, 124 Snap groove; 13 Bottom support part, 131 Third support plate, 132 Fourth support plate, 133 Bottom mounting seat, 1331 Fifth support plate, 1332 Sixth support plate, 1333 First hook part, 1334 Seventh support plate, 1335 Mounting groove, 1336 Second hook part, 134 Second hollow cavity; 14 Lightweight foam filling plate;

[0034] 2 Floor main body;

[0035] 3 First connecting piece, 31 T-bolt receiving groove, 32 Profile body, 33 Third snap part;

[0036] 4 Second connecting piece, 41 Second rectangular frame plate, 42 First connecting plate surface, 43 Second connecting plate surface, 44 Vertical connecting plate, 45 Nut plate, 46 Pressing boss, 47 Bolt;

[0037] 5 Clamping cover plate, 51 Eighth support plate, 52 Second snap part;

[0038] 6, 7, 8 Rivets;

[0039] 9 Transverse support beam, 91 T-bolt mounting groove, 92 L-shaped angle connecting piece, 93 T-bolt.

Detailed implementation manners

[0040] Embodiment:

[0041] Please refer to Figures 1-9 , in this embodiment, it is an integrated lightweight vehicle frame flat floor section assembly structure 100, which includes a floor main body 2 formed by splicing a plurality of floor profiles 1 together, a first connecting piece 3 arranged on the left and right sides of the floor main body 2 to connect the floor profile 1 and the side wall skeleton 101, a second connecting piece 4 arranged at the front and rear ends of the floor main body 2 to connect the floor profile 1 and the front and rear section vehicle frame structures 102, and a clamping cover plate 5 that buckles two adjacent floor profiles 1 together.

[0042] The floor profile 1 includes a first rectangular frame plate 11 with a first hollow cavity 111 formed therein, buckle structure plates 12 located on both sides of the first rectangular frame plate 11, and bottom support portions 13 located on both sides of the first rectangular frame plate 11 and extending downward. The front and rear ends of the first rectangular frame plate 11 are free extension ends, and their lengths are designed according to vehicle parameters. The front and rear ends of the first hollow cavity 111 are through and penetrating structures.

[0043] The buckle structure plate 12 includes a first support plate 121 extending outward perpendicular to the side surface of the first rectangular frame plate 11, a second support plate 122 extending vertically upward from the free end of the first support plate 121, a first buckle portion 123 formed by inverting inward from the free end of the second support plate 122, and a buckle groove 124 formed by surrounding the side surface of the buckle structure plate 12 and the first rectangular frame plate 11.

[0044] The bottom support portion 13 includes a third support plate 131 and a fourth support plate 132 arranged vertically in parallel, and a bottom mounting seat 133 provided at the bottom of the third support plate 131 and the fourth support plate 132. The top of the third support plate 131 is an integral structure with the first rectangular frame plate 11. The top of the fourth support plate 132 extends to the bottom of the first support plate 121 in the buckle structure plate 12 to support the buckle structure plate 12. The bottom support portion 13 further includes a second hollow cavity 134 formed by surrounding the third support plate 131, the buckle structure plate 12, the fourth support plate 132, and the bottom mounting seat 133. Lightweight foamed filling plates 14 are filled in the first hollow cavity 111 and the second hollow cavity 134.

[0045] In this embodiment, the third support plate 131 is flush with the side plate surface of the first rectangular frame plate 11. In another embodiment, the top of the third support plate 131 extends to the bottom surface of the first rectangular frame plate 11 to support the first rectangular frame plate 11.

[0046] The bottom mounting seat 133 includes a vertically arranged fifth support plate 1331, a sixth support plate 1332 horizontally extending outward from the top of the fifth support plate 1331 to support the third support plate 131 and the fourth support plate 132, and a first hook portion 1333 formed by bending downward and inward from the free end of the sixth support plate 1332. A horizontally arranged seventh support plate 1334 is provided at the bottom of the fifth support plate 1331, and a second hook portion 1336 is provided at the free end of the seventh support plate 1334 to form an installation groove 1335 with the first hook portion 1333. The installation groove 1335 formed by the support plates and the hook portions of the bottom mounting seat 133 can be used to receive and fix a T-shaped bolt for connection with other profiles.

[0047] The snap-on cover plate 5 includes an eighth support plate 51 flush with the upper surface of the first rectangular frame plate 11, and second snap portions 52 that are bent downward from both ends of the eighth support plate 51 and cooperate with the first snap portions 123 to be snap-fitted together. Among two adjacent floor profiles 1, the outer sides of the snap structure plates 12 are in contact with each other, and the two first rectangular frame plates 11 are snap-fitted together through the snap-on cover plate 5. The second snap portions 52 fill the snap grooves 124 and form a snap structure with the first snap portions 123 to achieve snap connection.

[0048] Among two adjacent floor profiles 1, the outer sides of the fifth support plates 1331 of the two bottom mounting seats 133 are in contact with each other and are fixedly connected together by rivets 7.

[0049] The side surfaces of the outermost floor profiles 1 on the left and right of the floor body 2 are in contact with the side wall frame surface, and rivets 8 for fixedly connecting the floor profile 1 and the side wall frame are provided at the position of the mounting groove 1335.

[0050] The first connecting member 3 includes a profile body 32 provided with a T-shaped bolt receiving groove 31, and a third snap portion 33 provided at the bottom of the profile body 32 and cooperating with the snap structure plate 12 in the floor profile 1 to achieve snap connection. One side surface of the profile body 32 is attached to the side wall frame and is fixedly connected to the side wall frame through a rivet 6. A T-shaped bolt (not marked in the figure) is installed in the T-shaped bolt receiving groove 31 and can be used to fix other structural members, such as seats.

[0051] The second connecting member 4 includes a second rectangular frame plate 41, a first connecting plate surface 42 that horizontally extends outward from one side plate surface of the second rectangular frame plate 41 and inserts into the first hollow cavity 111 and is in contact with the first surface 103 of the first rectangular frame plate 11, a second connecting plate surface 43 that inserts into the first hollow cavity 111 and is in contact with the second surface 104 of the first rectangular frame plate 11, and a vertical connecting plate 44 that connects the second connecting plate surface 43 and the second rectangular frame plate 41. A nut plate 45 is provided in the inner cavity of the second rectangular frame plate 41, and a pressing boss 46 for pressing the nut plate 45 is provided on the surface of the inner cavity wall of the second rectangular frame plate 41. The second connecting member 4 is fixedly connected to the L-shaped connecting member on the front and rear sections of the vehicle frame 102 through the nut plate 45 and the bolt 47. The first connecting plate surface 42 and the second connecting plate surface 43 are welded, or bonded, or riveted to the two surfaces of the floor profile 1. Even if welding is used here, compared with the original welding structure, the welding area in the structure of this solution is small and the number of welding times is small, and it will not affect the overall structural strength.

[0052] A height difference is provided between the upper surface of the first connecting plate surface 42 and the upper surface of the second rectangular frame plate 41, and this height difference is equal to the thickness of one plate surface of the floor profile 1, such that the upper surface of the second rectangular frame plate 41 is flush with the upper surface of the floor profile 1. A number of mounting holes (not marked in the figure) for bolts to pass through are provided on the lower plate surface of the second rectangular frame plate 41.

[0053] A number of transverse support beams 9 are also provided on the floor main body 2. The transverse support beams 9 on the same straight line are divided into several sections, and each section is correspondingly arranged with the floor profile 1. The two ends of each section of the transverse support beam 9 abut against the two opposite inner side surfaces of the bottom mounting seat 133 in the floor profile 1. T-shaped bolt mounting grooves 91 are provided on the front and rear side surfaces of the transverse support beam 9, and the transverse support beam 9 and the bottom mounting seat 133 are fixedly connected together through L-shaped angle connectors 92 and T-shaped bolts 93. T-shaped bolts 93 are provided in both the mounting groove 1335 and the T-shaped bolt mounting groove 91. The support strength of the floor assembly in the middle section of the vehicle frame can be enhanced through the transverse support beam 9.

[0054] This embodiment is an integrated lightweight vehicle frame flat floor section assembly structure 100. During assembly, first, the side parts of the floor profiles 1 are placed in contact with each other, and then the fastening cover plate 5 is axially (i.e., longitudinally) inserted from one end of the adjacent two snap structure plates 12 of the floor profiles 1 where they are in contact. At this time, the fastening cover plate 5 and the snap structure plate 12 are snap-fitted to achieve the snap connection of the adjacent two floor profiles 1, and at the bottom mounting seat 133, the lower parts of the two floor profiles 1 are further fixedly connected by structural rivets 7; then the above steps are repeated to complete the snap-connected profile floor main body 2 of all the floor profiles 1; then the second connectors 4 are installed at the front and rear ends of the floor main body 2, and the first connecting plate surface 42 and the second connecting plate surface 43 in the second connectors 4 are fixedly connected to the upper and lower plate surfaces in the floor profiles 1 by riveting or welding or bonding; finally, the first connectors 3 are installed on the left and right sides of the floor main body 2, and the third snap part 33 at the bottom of the first connector 3 is axially inserted from one end of the snap structure plate 12 of the floor profile 1, and the first connector 3 and the floor profile 1 are snap-connected through the snap connection between the third snap part 33 and the snap structure plate 12, thus completing the assembly of the entire vehicle frame middle section floor assembly. When connecting with the front and rear section structures 102 of the vehicle frame, the lower surface of the second rectangular frame plate 41 of the second connector 4 can be placed on the L-shaped connector on the front and rear section structures 102 of the vehicle frame and fixed connection is achieved through bolts; when connecting with the side wall skeleton 101, the first connector 3 and the side wall skeleton 101 are directly fixedly connected through rivets 8 and rivets 6.

[0055] The beneficial effects of this embodiment of the integrated lightweight vehicle frame flat floor section assembly structure 100 are as follows:

[0056] 1) The floor profile comes with a bottom support structure, eliminating the need for additional support components, reducing the assembly process, reducing the number of components, and lowering the overall weight.

[0057] 2) The floor profile adopts an internal hollow structure, achieving lightweight design while meeting the strength requirements. Moreover, heat-insulating and noise-reducing materials are arranged in the hollow cavity to realize the functions of heat insulation and noise reduction.

[0058] 3) On both sides of the floor profile, a clamping structure is set up, and together with the snap-on cover plate, it realizes the clamping assembly of the floor, reducing the process operation of bolt connection and eliminating the drilling process requirement in the original bolt connection, lowering the process difficulty, being more convenient and efficient in the assembly between floor profiles, and improving the assembly efficiency.

[0059] 4) On the left and right sides of the floor profile, the first connecting piece is installed by a clamping method. A T-shaped bolt installation groove is arranged on the first connecting piece, which cooperates with the T-shaped bolt installation groove at the lower part of the floor profile. Then, through structural rivets, the upper and lower parts of the floor assembly are firmly fixed and connected to the side wall frame together. Its installation is convenient and efficient, greatly improving the connection efficiency and convenience between the floor assembly in the middle section of the vehicle frame and the side wall frame.

[0060] 5) At the front and rear ends of the floor profile, the second connecting piece is installed by means of bolt connection, riveting, bonding, or welding. And through the nut plate embedded in the second connecting piece, the quick connection with the front and rear section structures of the vehicle frame can be realized quickly, greatly facilitating the connection and assembly between the middle section of the vehicle frame and the front and rear sections of the vehicle frame, and improving the assembly efficiency.

[0061] 6) The floor profile comes with a bottom support structure. The floor assembly formed by cooperating with the transverse support beam arranged at the bottom support structure can be directly used as the middle section of the vehicle frame and directly connected to the front and rear section structures of the vehicle frame and the side wall frame without additionally setting up the middle section of the vehicle frame, greatly reducing the weight of the vehicle frame, which is of great significance for improving the cruising range of electric vehicles.

[0062] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several variations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An integrated lightweight vehicle frame flat floor section assembly structure, characterized in that: It includes a floor main body formed by splicing a plurality of floor profiles, a first connecting member disposed on the left and right sides of the floor main body and connecting the floor profiles to the side enclosure frame, a second connecting member disposed at the front and rear ends of the floor main body and connecting the floor profiles to the front and rear section vehicle frame structures, and a fastening cover plate for buckling two adjacent floor profiles together; Snap structure plates are provided on both sides of the floor profile, and second snap portions capable of buckling the snap structure plates on two adjacent floor profiles together are provided on the fastening cover plate; third snap portions for cooperating with the snap structure plates to achieve snap connection are provided on the first connecting member; The floor profile includes a first rectangular frame plate with a first hollow cavity formed therein, the snap structure plates located on both sides of the first rectangular frame plate, and bottom support portions extending downward on both sides of the first rectangular frame plate; the snap structure plate includes a first support plate extending outward perpendicular to the side surface of the first rectangular frame plate, a second support plate vertically extending upward from the free end of the first support plate, a first snap portion formed by inverting inward from the free end of the second support plate, and a snap groove formed by surrounding the side surface of the snap structure plate and the first rectangular frame plate; The fastening cover plate includes an eighth support plate flush with the upper surface of the first rectangular frame plate, and the second snap portions that are bent downward from both ends of the eighth support plate and cooperate with the first snap portions to be snapped together; in two adjacent floor profiles, the outer side surfaces of the snap structure plates are attached to each other, and the two first rectangular frame plates are buckled together through the fastening cover plate; the second snap portions fill the snap grooves and form a snap structure with the first snap portions to achieve snap connection.

2. The integrated lightweight vehicle frame flat floor section assembly structure according to claim 1, characterized in that: The bottom support portion includes a second hollow cavity and a bottom mounting seat for supporting the second hollow cavity.

3. The integrated lightweight vehicle frame flat floor section assembly structure according to claim 2, wherein: Lightweight foamed filling plates are filled and provided in the first hollow cavity and the second hollow cavity.

4. The integrated lightweight vehicle frame flat floor section assembly structure according to claim 2, characterized in that: An installation groove with an inward opening and used for receiving and fixing a T-shaped bolt is provided on the bottom mounting seat.

5. The integrated lightweight vehicle frame flat floor section assembly structure according to claim 2, characterized in that: The bottom mounting seats of two adjacent floor profiles are attached to each other and are connected together by rivets or bolts.

6. The integrated lightweight vehicle frame flat floor section assembly structure according to claim 1, characterized in that: The first connecting member includes a profile body provided with a T-shaped bolt receiving groove and the third snap portion disposed at the bottom of the profile body.

7. The integrated lightweight vehicle frame flat floor section assembly structure according to claim 1, characterized in that: The second connecting member includes a second rectangular frame plate, a first connecting plate surface horizontally extending outward from one side plate surface of the second rectangular frame plate and inserted into the first hollow cavity and attached to the first surface of the first rectangular frame plate, a second connecting plate surface inserted into the first hollow cavity and attached to the second surface of the first rectangular frame plate, and a vertical connecting plate connecting the second connecting plate surface and the second rectangular frame plate.

8. The integrated lightweight vehicle frame flat floor section assembly structure according to claim 7, wherein: A nut plate is provided in the inner cavity of the second rectangular frame plate, and a pressing boss for pressing the nut plate is provided on the surface of the inner cavity wall of the second rectangular frame plate.

9. The integrated lightweight vehicle frame flat floor section assembly structure according to claim 2, characterized in that: A number of transverse support beams are also provided on the floor body. The transverse support beams on the same straight line are divided into several sections, and each section of the transverse support beam is correspondingly arranged with the floor profile; both ends of each section of the transverse support beam abut against two opposite inner side surfaces of the bottom mounting seat in the floor profile; T-shaped bolt mounting grooves are provided on the front and rear side surfaces of the transverse support beam, and the transverse support beam and the bottom mounting seat are fixedly connected together through L-shaped angle connectors and T-shaped bolts.

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