Frame and vehicle body connecting assembly and vehicle

Abstract

The utility model discloses a vehicle frame and vehicle body connecting assembly and a vehicle, the vehicle frame and vehicle body connecting assembly comprises a vehicle body beam piece, a vehicle frame beam piece and a limiting piece, the vehicle body beam piece comprises a main body part and an upper connecting part formed by sinking the main body part in the first direction; the frame beam piece comprises a beam body and a lower connecting part which protrudes from the beam body in the first direction and extends opposite to the upper connecting part, the lower connecting part comprises a top attaching wall, the limiting piece comprises a driving part and a driven part, and the driving part and the driven part are connected to the upper connecting part and contained in the lower connecting part respectively. The limiting piece is hidden in the vehicle body longitudinal beam and the vehicle frame longitudinal beam, the part, protruding out of the vehicle frame longitudinal beam, of the connecting structure coincides with the space of the vehicle body longitudinal beam and is located in the assembly space necessary for assembly among the vehicle body longitudinal beam, the shock absorber and the rear-row floor of the compartment, no extra connecting support needs to be arranged to occupy the other vertical space, and the assembly efficiency is improved. And the vertical space can be saved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular to a frame-body connection assembly and a vehicle. Background Art

[0002] The body and frame of a semi-load-bearing vehicle body are two relatively independent parts, and the body and frame are rigidly connected. When the body and frame are assembled, the frame is relatively fixed, and the body falls from top to bottom on the frame, and a connecting bracket is used to lock the body and frame. When designing and manufacturing the frame and body, in order to ensure the structural strength and the comfort of passengers, a large vertical space is required to arrange the components. Specifically, the frame longitudinal beam is generally made of cast aluminum material, and the body longitudinal beam is generally made of steel. Since the strength of cast aluminum material is less than that of steel, the cross-sectional size of the frame longitudinal beam needs to be larger than the body longitudinal beam; the rear steering link and air spring of the vehicle also require a lot of space in the vertical direction; the rear suspension of the vehicle body also needs to be equipped with a large-stroke shock absorber to improve the comfort of passengers. In the related art, an independent body-frame connecting bracket needs to be set when the frame and body are connected, which will limit the rear space of the vehicle, the installation stroke of the rear suspension shock absorber and the vertical cross-sectional size of the frame longitudinal beam. Utility Model Content

[0003] The embodiments of the present application provide a frame-body connection assembly and a vehicle, which solve the problem that it is difficult to effectively connect the body and the frame of a semi-load-bearing body while maintaining a large rear passenger space and a large travel of the rear suspension shock absorber.

[0004] In a first aspect, an embodiment of the present application provides a vehicle-frame body connection assembly, which comprises a vehicle-frame beam, a frame beam and a limiting member, wherein the vehicle-frame beam comprises a main body and an upper connection portion formed by the main body being recessed along a first direction, the upper connection portion comprising a bottom fitting wall and a side extension wall, at least one of the side extension walls extending from the bottom fitting wall to a vehicle-body floor and at least partially stacked with the vehicle-body floor; the frame beam comprises a beam body and a lower connection portion protruding from the beam body along the first direction and extending toward the upper connection portion, the lower connection portion comprising a top fitting wall, the top fitting wall being abutted against the bottom fitting wall; the limiting member comprises an active portion and a passive portion, the active portion and the passive portion being respectively connected to the upper connection portion and accommodated in the lower connection portion, and cooperating with each other to constrain the relative displacement between the bottom fitting wall and the top fitting wall.

[0005] According to the first aspect of the present application, the vehicle body beam is a vehicle body longitudinal beam, and the vehicle body longitudinal beam includes a first extension wall, the bottom fitting wall and the side extension wall. The first extension wall is arranged on a first side of the wheel arch inner panel, and the first extension wall and the side extension wall are respectively connected to the two sides of the bottom fitting wall, and together with the bottom fitting wall, they form a first chamber, and the first chamber can accommodate the active part.

[0006] According to the first aspect of the present application, the side extension wall includes a first supporting wall and a second supporting wall connected to each other, the first supporting wall extends from the edge of the bottom fitting wall toward the vehicle body floor, and the second supporting wall, the bottom fitting wall and the top fitting wall extend along the second direction and are arranged in a stacked manner.

[0007] According to the first aspect of the present application, the second support wall is overlapped and connected to the vehicle body floor, the first chamber is recessed along the first direction in the extension surface corresponding to the second support wall, and the active portion is provided with a first assembly gap along the second direction with the inner circumferential surface of the first chamber.

[0008] According to the first aspect of the present application, the frame beam is a frame longitudinal beam, and the frame longitudinal beam has the top fitting wall and a second extension wall connected to the top fitting wall, and the second extension wall is arranged on the second side of the wheel house inner panel and is arranged with a second assembly gap between the wheel house inner panel and the frame longitudinal beam.

[0009] According to the first aspect of the present application, the second extension wall has a consistent extension direction with a portion of the wheel arch inner panel and is connected to the shock absorber, and the second extension wall cooperates with the shock absorber, the bottom fitting wall and the side extension wall to form an assembly cavity or a portion of the assembly cavity.

[0010] According to the first aspect of the present application, the active portion includes more than two thread constraint groups, each of the thread constraint groups is arranged at intervals along the third direction, and includes bolts and screw holes that are meshed with each other and correspond one to one; the bolts are configured to extend along the first direction and pass through the screw holes, and the screw holes are opened in the bottom fitting wall; or, a longitudinal beam reinforcement plate is provided inside the first chamber, and the longitudinal beam reinforcement plate is connected to the side of the bottom fitting wall away from the top fitting wall, and the screw holes are opened in the bottom fitting wall and the longitudinal beam reinforcement plate.

[0011] According to the first aspect of the present application, the passive portion includes a second chamber, which corresponds to the screw hole one by one and is coaxially arranged. The second chamber is recessed in the top fitting wall and extends along the first direction toward the inside of the frame longitudinal beam.

[0012] According to the first aspect of the present application, the inner wall of the second chamber is turned to have a threaded section, and the threaded section is suitable for limiting the fit with the bolt; or, the inner wall of the second chamber is smooth and fixedly connected with a threaded sleeve, and the threaded sleeve is constructed so that it can limit the fit with the bolt.

[0013] In a second aspect, an embodiment of the present application further provides a vehicle, the vehicle comprising any of the aforementioned frame-body connection assemblies.

[0014] The frame-body connection assembly and the vehicle provided in the embodiments of the present application, wherein the body beam and the frame beam are connected by a limiter, can ensure the connection strength between the body and the frame, and the limiter is hidden in the body beam and the frame beam, wherein part of the connection structure protruding from the frame beam overlaps with the body beam space, and is located in the assembly space required for assembly between the body beam, the shock absorber and the body floor, and there is no need to set up additional connection brackets to occupy the remaining vertical space. The frame-body connection assembly of the present application can save vertical space while ensuring the effective connection between the body and the frame, so that the vehicle can be provided with a larger rear space, a rear suspension shock absorber installation stroke and a vertical cross-sectional size of the frame longitudinal beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0016] Figure 1 is a three-dimensional schematic diagram of a frame-body connection assembly provided in an embodiment of the present application;

[0017] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0018] Figure 3 is a schematic diagram of the position of the frame-body connection assembly provided in an embodiment of the present application on a vehicle;

[0019] Figure 4 yes Figure 3 Schematic cross section along BB.

[0020] In the drawings, the drawings are not necessarily drawn to scale.

[0021] Reference numerals: bottom fitting wall 1; side extension wall 2; first supporting wall 21; second supporting wall 22; vehicle body floor 3; top fitting wall 4; vehicle body longitudinal beam 5; first extension wall 51; longitudinal beam reinforcement plate 52; wheel house inner plate 6; frame longitudinal beam 7; second extension wall 71; shock absorber 8; bolt 9; first chamber a; seat accommodating chamber b; assembly clamping chamber c; second chamber d; shock absorber mounting point e;

[0022] The first direction is X1; the second direction is X2; and the third direction is X3. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. 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 and secondary relationship.

[0025] This application is based on the inventor's discovery and understanding of the following facts and problems:

[0026] In the related art, the body and frame of a semi-load-bearing vehicle are two relatively independent parts, and bolts and nuts are used to achieve a rigid connection between the body and the frame. The body part needs to meet higher airtightness requirements, and the frame part has no sealing requirements. During the assembly process of the frame and body of the semi-load-bearing vehicle, the frame is relatively fixed, and the body falls from top to bottom on the frame along a first direction X1, and then the frame and the body are fixed with bolt and nut assemblies. The contact surface between the body and the frame is mainly in the first direction X1, and the contact surface in the second direction X2 and the third direction X3 is a gap to meet the space requirements for loading parts.

[0027] The performance of the body side is mainly controlled by the location and number of connection points, the material and thickness of the body beam parts, and whether to add reinforcement plates. The performance of the frame side is mainly controlled by changing the height and thickness of the reinforcement ribs at the installation points, changing the wall thickness of the machined threaded holes, the length of the wire screw sleeves, and the material of the frame parts. When the frame and the body are bolted together, an independent body-frame connection bracket needs to be set to ensure the effectiveness of the frame-body connection. However, the independent body-frame connection bracket will occupy a certain space along the first direction X1, thereby limiting the rear space of the vehicle, the installation stroke of the rear suspension shock absorber, and the vertical cross-sectional size of the frame longitudinal beam, affecting the strength and performance of the semi-load-bearing vehicle.

[0028] In order to solve the above problems, the embodiment of the present application provides a frame body connection assembly and a vehicle. Figure 1-Figure 4 The frame-body connection assembly and the vehicle according to the embodiment of the present application are described in detail.

[0029] like Figure 1 As shown, an embodiment of the present application provides a vehicle frame body connection assembly, which includes a vehicle body beam, a frame beam and a limit member, wherein the vehicle body beam includes a main body and an upper connection portion formed by the main body being recessed along a first direction.

[0030] Specifically, Figure 4 As shown, the upper connection portion includes a bottom fitting wall 1 and a side extension wall 2, at least one side extension wall 2 extends from the bottom fitting wall 1 to the vehicle body floor 3, and at least one side extension wall 2 is at least partially stacked with the vehicle body floor 3. It can be understood that the upper side of the vehicle body floor 3 along the first direction X1 is the vehicle interior space, and the vehicle body floor 3 is affected by the structural type of the vehicle interior space. The vehicle body floor 3 has an upwardly inclined branch section and a horizontal branch section, and the side extension wall 2 is constructed so that its part is overlapped and connected with the horizontal branch section of the vehicle body floor 3, so that the side extension wall 2 utilizes the existing structural shape of the vehicle body floor 3 to connect with the vehicle body floor 3 to improve the strength and overall rigidity of its connection.

[0031] like Figure 3 and Figure 4 As shown, Figure 4 yes Figure 3 In the middle BB cross-sectional schematic diagram, the frame beam member includes a beam body and a lower connecting portion protruding from the beam body along a first direction and extending toward the upper connecting portion, and the lower connecting portion includes a top fitting wall 4, which is arranged in abutment with the bottom fitting wall; it can be understood that when the frame longitudinal beam and the body longitudinal beam are fitted and connected to each other, the top fitting wall 4 and the bottom fitting wall 1 are connected to each other. The limiting member includes an active portion and a passive portion, which are respectively connected to the upper connecting portion and accommodated in the lower connecting portion, and cooperate with each other to restrict the relative displacement between the bottom fitting wall 1 and the top fitting wall 4.

[0032] Thus, the active portion of the limiting member for connecting the vehicle body longitudinal beam 5 and the frame longitudinal beam 7 is connected to the upper connecting portion, and the passive portion is accommodated in the lower connecting portion. It can be understood that the active portion and the passive portion are arranged at the upper connecting portion and the lower connecting portion, and do not occupy other space except the upper connecting portion and the lower connecting portion. Therefore, the limiting members of the vehicle body longitudinal beam and the frame longitudinal beam in the present application can be hidden in the vehicle body longitudinal beam and the frame longitudinal beam, and when assembling the vehicle body longitudinal beam and the frame longitudinal beam, there is no need to set an additional connecting bracket to occupy the vertical space.

[0033] In some embodiments, please refer to Figure 2 and Figure 4The vehicle body beam is a vehicle body longitudinal beam 5, which includes a first extension wall 51, a bottom fitting wall 1 and a side extension wall 2. The first extension wall 51 is arranged on a first side of the wheel house inner panel 6. The first extension wall 51 and the side extension wall 2 are respectively connected to the two sides of the bottom fitting wall 1, and together with the bottom fitting wall 1, they form a first chamber a, and the first chamber a can accommodate the active part.

[0034] It can be understood that the first chamber a surrounded by the first extension wall 51, the side extension wall 2 and the bottom fitting wall 1 is recessed in the extension surface of the horizontal branch section of the vehicle body floor 3, and the active part will not extend out of the extension surface of the horizontal branch section of the vehicle body floor 3 when it is arranged inside the first chamber a. Therefore, the active part of the limit member is within the spatial dimension range occupied by the vehicle body floor 3 along the first direction X1.

[0035] It is also important to emphasize that please refer to Figure 4 In the two-dimensional structural plane established by the first direction X1 and the second direction X2, there is an assembly cavity c corresponding to the outer side of the seat accommodating cavity b. It can be understood that the assembly cavity c is a necessary space required for the assembly of other components of the vehicle, and the first cavity a is formed inside the assembly cavity c.

[0036] Therefore, the aforementioned layout of the first extension wall 51, the side extension wall 2 and the bottom fitting wall 1 can limit the space occupied by the active part of the limiter to the necessary space required for assembly of other vehicle components such as the vehicle body floor 3.

[0037] In some embodiments, Figure 2 and Figure 4 As shown, the side extension wall 2 includes a first supporting wall 21 and a second supporting wall 22 connected to each other, the first supporting wall 21 extends from the edge of the bottom fitting wall 1 toward the vehicle body floor 3, and the second supporting wall 22, the bottom fitting wall 1 and the top fitting wall 4 extend along the second direction X2 and are stacked. The second supporting wall 22 is overlapped and connected to the vehicle body floor 3, the first chamber a is recessed in the corresponding extension surface of the second supporting wall 22 along the first direction X1, and the active part is provided with a first assembly gap along the second direction X2 and the inner circumference of the first chamber a.

[0038] It is understandable that, in order to ensure that the operator can assemble the active part in the first chamber a, the size of the active part of the limiter is limited to the range of the inner cavity size of the first chamber a during design and manufacturing. Based on this, there is a first assembly gap between the active part and the inner cavity of the first chamber a, so that the limiter can be installed smoothly and conveniently.

[0039] In some embodiments, please refer to Figure 4The frame beam is a frame longitudinal beam 7, and the frame longitudinal beam 7 has a top fitting wall 4 and a second extension wall 71 connected to the top fitting wall 4. The second extension wall 71 is provided on the second side of the wheel house inner panel 6 and is arranged with a second assembly gap between the wheel house inner panel 6 and the second extension wall 71 and a part of the wheel house inner panel 6 have the same extension direction and are connected to the shock absorber 8. The second extension wall 71 cooperates with the shock absorber 8, the bottom fitting wall 1 and the side extension wall 2 to form an assembly clamping cavity c or a part of the assembly clamping cavity c.

[0040] It is understandable that the assembly cavity c is formed by assembling the wheel housing inner plate 6, the shock absorber 8 and other necessary components of the vehicle. Figure 1 , the shock absorber 8 can be connected to the shock absorber mounting point e, please refer to Figure 4 The assembly cavity c is located outside the seat accommodating cavity b. During the installation of the vehicle body longitudinal beam and the frame longitudinal beam, the limiting member is arranged inside the assembly cavity c without occupying other space along the first direction X1.

[0041] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 4 The active part includes more than two thread constraint groups, each thread constraint group is arranged at intervals along the third direction X3, and includes mutually meshing and one-to-one corresponding bolts 9 and screw holes, the bolts 9 are configured to extend along the first direction X1 and pass through the screw holes, and the screw holes are opened in the bottom fitting wall 1.

[0042] It can be understood that for a semi-loaded vehicle, during the assembly process of the frame and the body, the body falls onto the frame from top to bottom along the first direction X1, and the bolts 9 are passed through and limited inside the screw holes, so that the present application uses bolt limiting to complete the fixed packaging of the body and the frame.

[0043] In other embodiments, please refer to Figure 2 A longitudinal beam reinforcement plate 52 is provided inside the first chamber a, and the longitudinal beam reinforcement plate 52 is connected to the side of the bottom fitting wall 1 away from the top fitting wall 4, and screw holes are provided in the bottom fitting wall 1 and the longitudinal beam reinforcement plate 52. It can be understood that the longitudinal beam reinforcement plate 52 can improve the strength of the bolt 9 installation.

[0044] In some embodiments, Figure 4 As shown, the passive part includes a second chamber d, which corresponds to the screw hole one by one and is coaxially arranged. The second chamber d is recessed in the top fitting wall 4 and extends along the first direction X1 toward the inside of the frame longitudinal beam 7.

[0045] It can be understood that the second chamber d is arranged inside the frame longitudinal beam 7, and the screw hole is arranged inside the second chamber d, so the screw hole in the position-limiting member for connecting the vehicle body and the frame is located in the frame longitudinal beam 7 in terms of the arrangement space. In addition, the portion where the bolt 9 is position-limitedly connected to the screw hole is arranged inside the frame longitudinal beam 7 along the first direction X1, so the portion where the bolt 9 is position-limitedly connected to the screw hole will not occupy the space outside the frame longitudinal beam 7. Based on this, when assembling the vehicle body longitudinal beam and the frame longitudinal beam, it is not necessary to arrange an additional connection bracket to occupy the vertical space along the first direction X1.

[0046] In one example, the inner wall of the second chamber d is formed with a threaded section by turning, and the threaded section is suitable for limiting cooperation with the bolt 9.

[0047] In another example, the inner wall of the second chamber d is smooth and fixedly connected with a threaded sleeve, and the threaded sleeve is configured to be able to cooperate with the bolt 9 in a limited position.

[0048] The embodiment of the present application also provides a vehicle, which includes the aforementioned frame-body connection assembly. The vehicle using the aforementioned frame-body connection assembly can complete the connection between the body longitudinal beam and the frame longitudinal beam without setting up an additional independent connection bracket. The space occupied by the limit member in this solution is inside the assembly cavity c required for the connection and installation of other necessary components such as the body longitudinal beam 5, the shock absorber 8 and the body floor 3, and there is no need to set up an additional connection bracket to occupy the remaining vertical space. The frame-body connection assembly of the present application, on the premise of ensuring the effective connection between the body and the frame, the limit member is hidden in the body longitudinal beam 5 and the frame longitudinal beam 7. Specifically, the space of the limit member overlaps with the frame longitudinal beam 7, which can save vertical space, so that the vehicle can be provided with a larger rear space, the installation stroke of the shock absorber 8 of the rear suspension and the vertical cross-sectional size of the frame longitudinal beam 7.

[0049] In summary, the present application adopts a method of arranging the rigid connection points of the body and frame inside the body longitudinal beam, omitting the independent body-frame connection bracket, reducing the demand for layout space of the connection structure, and leaving more space for the passengers and chassis layout in the vehicle. The vehicle using the frame-body connection assembly of the present application can set a larger body longitudinal beam size, thereby solving the problem of the body longitudinal beam having a small cross-section due to insufficient layout space. The torsional stiffness and mode of the whole vehicle can meet the performance indicators, effectively improving the bending strength and mode of the whole vehicle.

[0050] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0053] The term "plurality" used in the present application refers to two or more (including two).

[0054] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A frame-body connection assembly, characterized in that: include: A vehicle body beam, comprising a main body and an upper connecting portion formed by the main body being recessed along a first direction, the upper connecting portion comprising a bottom fitting wall (1) and a side extension wall (2), at least one of the side extension walls (2) extending from the bottom fitting wall (1) to a vehicle body floor (3), and at least partially stacked with the vehicle body floor (3); A frame beam, comprising a beam body and a lower connecting portion protruding from the beam body along the first direction and extending toward the upper connecting portion, wherein the lower connecting portion comprises a top fitting wall (4), and the top fitting wall (4) is arranged in abutment with the bottom fitting wall; and The limiting member comprises an active part and a passive part, wherein the active part and the passive part are respectively connected to the upper connecting part and accommodated in the lower connecting part, and cooperate with each other to constrain the relative displacement between the bottom fitting wall (1) and the top fitting wall (4).

2. The vehicle frame and body connection assembly according to claim 1, characterized in that: The vehicle body beam is a vehicle body longitudinal beam (5), the vehicle body longitudinal beam (5) comprises a first extension wall (51), the bottom fitting wall (1) and the side extension wall (2), the first extension wall (51) being arranged on a first side of the wheel house inner plate (6); The first extension wall (51) and the side extension wall (2) are respectively connected to the two sides of the bottom fitting wall (1), and together with the bottom fitting wall (1) form a first chamber (a), wherein the first chamber (a) can accommodate the active part.

3. The vehicle frame body connection assembly according to claim 2, characterized in that: The side extension wall (2) comprises a first supporting wall (21) and a second supporting wall (22) which are connected to each other, wherein the first supporting wall (21) extends from the edge of the bottom fitting wall (1) toward the vehicle body floor (3), and the second supporting wall (22), the bottom fitting wall (1) and the top fitting wall (4) extend along a second direction and are arranged in a stacked manner.

4. The vehicle frame and body connection assembly according to claim 3, characterized in that: The second supporting wall (22) is overlapped and connected to the vehicle body floor (3); the first chamber (a) is recessed along the first direction into an extension surface corresponding to the second supporting wall (22); and a first assembly gap is provided between the active portion and the inner peripheral surface of the first chamber (a) along the second direction.

5. The vehicle frame and body connection assembly according to claim 2, characterized in that: The frame beam is a frame longitudinal beam (7), and the frame longitudinal beam (7) has the top fitting wall (4) and a second extension wall (71) connected to the top fitting wall (4), and the second extension wall (71) is arranged on the second side of the wheel house inner panel (6) and is arranged with a second assembly gap between the wheel house inner panel (6).

6. The vehicle frame and body connection assembly according to claim 5, characterized in that: The second extension wall (71) has a consistent extension direction with a part of the wheel arch inner panel (6) and is connected to the shock absorber (8). The second extension wall (71) cooperates with the shock absorber (8), the bottom fitting wall (1) and the side extension wall (2) to form an assembly cavity (c) or a part of the assembly cavity (c).

7. The vehicle frame and body connection assembly according to claim 5, characterized in that: The active part comprises more than two thread constraint groups, each of which is arranged at intervals along the third direction and comprises mutually meshing and one-to-one corresponding bolts (9) and screw holes; The bolt (9) is configured to extend along the first direction and pass through the screw hole, and the screw hole is opened in the bottom fitting wall (1); or, A longitudinal beam reinforcement plate (52) is provided inside the first chamber (a), and the longitudinal beam reinforcement plate (52) is connected to the side of the bottom fitting wall (1) facing away from the top fitting wall (4), and the screw holes are opened in the bottom fitting wall (1) and the longitudinal beam reinforcement plate (52).

8. The vehicle frame and body connection assembly according to claim 7, characterized in that: The passive part comprises a second chamber (d), the second chamber (d) corresponds to the screw hole one by one and is coaxially arranged, the second chamber (d) is recessed in the top fitting wall (4), and is extended along the first direction toward the inside of the frame longitudinal beam (7) to be formed.

9. The vehicle frame and body connection assembly according to claim 8, characterized in that: The inner wall of the second chamber (d) is formed with a threaded section by turning, and the threaded section is suitable for limited cooperation with the bolt (9); or, The inner wall of the second chamber (d) is smooth and fixedly connected with a threaded sleeve, and the threaded sleeve is constructed so that it can be limitedly matched with the bolt (9).

10. A vehicle, characterized in that: A vehicle frame and body connection assembly comprising any one of claims 1-9.

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