Connecting structure of longitudinal beam rear section and rear floor lower cross beam

Abstract

The utility model discloses a connecting structure of a longitudinal beam rear section and a rear floor lower cross beam, which comprises a longitudinal beam rear section body, a lower cross beam body and a longitudinal beam reinforcing member, the longitudinal beam reinforcing member is arranged on the longitudinal beam rear section body, the longitudinal beam reinforcing member and the longitudinal beam rear section body form a cavity, and the lower cross beam body is connected to the longitudinal beam reinforcing member; according to the connecting structure of the longitudinal beam rear section and the rear floor lower cross beam, the longitudinal beam reinforcing component is arranged on the longitudinal beam rear section body so that the longitudinal beam rear section body can form a space cavity structure, the lower cross beam body is connected to the longitudinal beam reinforcing component instead of being directly connected to a longitudinal beam, and therefore after an auxiliary frame is installed, the longitudinal beam rear section body can be connected with the rear floor lower cross beam body. In the excitation transmission process, the excitation is weakened by the cavity jointly formed by the longitudinal beam reinforcing component and the longitudinal beam rear section body and then transmitted to the rear floor lower cross beam, the structural rigidity is improved, the cavity structure effectively absorbs energy and reduces vibration, excitation transmitted to the vehicle body side is effectively reduced, and the riding comfort of a passenger compartment is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of car body structure relates to a rear section of longitudinal beam and rear floor lower crossbeam connecting structure. BACKGROUND

[0002] The rear subframe is an important part of the automobile chassis system, which connects the vehicle body and the suspension system, bears and transmits the force and torque generated by the automobile driving under various conditions, reduces the input of road vibration, and improves the ride comfort. The rear subframe is connected to the vehicle body through multiple mounting points, among which the connection position of the rear section of the longitudinal beam and the lower crossbeam of the rear floor is one of the common mounting points of the rear subframe.

[0003] As a common mounting point of the rear subframe, the structural stiffness of the connection position of the rear section of the longitudinal beam and the lower crossbeam of the rear floor is crucial. If the structural stiffness at this position is low, it is difficult to meet the installation requirements, and it will directly affect the vibration transmission of the subframe, and further affect the driving comfort of the passenger compartment.

[0004] To solve the above problems, a connecting structure is needed, which can effectively improve the structural stiffness at the connection position, effectively reduce the excitation transmitted to the vehicle body side, and improve the ride comfort of the passenger compartment. SUMMARY

[0005] Therefore, the utility model provides a rear section of longitudinal beam and rear floor lower crossbeam connecting structure, sets up longitudinal beam reinforcing member on the rear section of longitudinal beam body to make the rear section of longitudinal beam body form a space cavity structure, connects the lower crossbeam body to the longitudinal beam reinforcing member instead of directly connecting to the longitudinal beam, so that after the subframe is installed, the excitation transmission will pass through the cavity formed by the longitudinal beam reinforcing member and the rear section of longitudinal beam body, and then be transmitted to the lower crossbeam of the rear floor. Not only the structural stiffness is improved, but also the cavity structure effectively absorbs energy and reduces vibration, effectively reduces the excitation transmitted to the vehicle body side, and improves the ride comfort of the passenger compartment.

[0006] The rear section of longitudinal beam and rear floor lower crossbeam connecting structure of the utility model, including the rear section of longitudinal beam body, the lower crossbeam body and the longitudinal beam reinforcing member, the longitudinal beam reinforcing member is arranged in the rear section of longitudinal beam body, the longitudinal beam reinforcing member and the rear section of longitudinal beam body form a cavity, and the lower crossbeam body is connected to the longitudinal beam reinforcing member.

[0007] Further, it further includes a connecting assembly, and the connecting assembly includes a lower connecting plate.

[0008] Further, the connecting assembly further includes an upper connecting plate, the upper connecting plate is covered on the lower connecting plate, the upper connecting plate and the lower connecting plate form a hollow cavity structure, and the upper connecting plate is overlapped on the top surface of the longitudinal beam reinforcing member.

[0009] Further, the longitudinal beam reinforcing member comprises a reinforcing cover plate and a supporting plate, the reinforcing cover plate comprises an integral top plate and side plate, the supporting plate is connected to the top plate of the reinforcing cover plate, the supporting plate and the side plate are respectively arranged at two ends of the top plate in the Y direction so that the longitudinal beam reinforcing member is in an open downward "J" shape structure, and the longitudinal beam reinforcing member is covered on the longitudinal beam rear body from top to bottom and forms a cavity at the upper part of the longitudinal beam rear body.

[0010] Further, the upper connecting plate is overlapped on the top surface of the top plate, and the lower connecting plate is connected to the side plate.

[0011] Further, the two ends of the top plate in the X direction respectively extend to the longitudinal beam rear body to form supporting flanges, and the supporting flanges are connected to the top surface of the longitudinal beam rear body.

[0012] Further, the connecting assembly further comprises a connecting plate inner reinforcing plate, the connecting plate inner reinforcing plate is arranged at a position between the upper connecting plate and the lower connecting plate, one end of the connecting plate inner reinforcing plate in the Y direction is attached to the bottom surface of the upper connecting plate, and the other end of the connecting plate inner reinforcing plate in the Y direction is attached to the top surface of the lower connecting plate.

[0013] Further, the longitudinal beam inner reinforcing plate is arranged in the cavity of the longitudinal beam rear body corresponding to the position of the longitudinal beam reinforcing member, and the longitudinal beam inner reinforcing plate divides the cavity of the longitudinal beam rear body in the Z direction.

[0014] Further, the rear part of the longitudinal beam inner reinforcing plate in the X direction is bent towards the top of the longitudinal beam rear body and is attached to the top surface of the cavity of the longitudinal beam rear body.

[0015] The utility model discloses the beneficial effects of:

[0016] The utility model discloses longitudinal beam rear segment and rear floor lower crossbeam connecting structure, set up longitudinal beam reinforcing member on longitudinal beam rear body to make longitudinal beam rear body form a spatial cavity structure, connect the lower crossbeam body to longitudinal beam reinforcing member instead of directly connecting to longitudinal beam, make after -installation sub -frame, the process of excitation transmission, will pass through the cavity that longitudinal beam reinforcing member and longitudinal beam rear body jointly constitute weakens after transmission to rear floor lower crossbeam, not only promote the structure rigidity, cavity structure also effectively carries out energy absorption and reduces vibration, effectively reduce the excitation that transmission to the car body side, promote the comfort of passenger cabin to ride.In the utility model, the connecting assembly is also the spatial cavity structure that multi -layer plate gold spare superposition constitutes, in addition to the structure rigidity of reinforcing the connecting position, the excitation that multi -layer cavity structure also effectively weakens sub -frame transmission to the car body side, the setting of longitudinal beam inner reinforcing plate further enhances the structure rigidity and energy absorption and reduces vibration's ability at the connecting position, make the whole dynamic rigidity of the utility model get the remarkable promotion, and have good energy absorption and reduce vibration's function, and the driving comfort of passenger cabin is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structure top view of the utility model;

[0018] Figure 2 is a structure bottom isometric view of the utility model;

[0019] Figure 3 is a structure schematic view of the longitudinal beam reinforcing component of the utility model;

[0020] Figure 4 is a structure explosion schematic view of the longitudinal beam reinforcing component of the utility model;

[0021] Figure 5 is a structure schematic view of the connecting assembly of the utility model;

[0022] Figure 6 is a structure explosion schematic view of the connecting assembly of the utility model;

[0023] Figure 7 is a mounting structure schematic view of the longitudinal beam inner reinforcing plate of the utility model. DETAILED DESCRIPTION

[0024] It should be noted that in the description of the present application, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should be particularly noted that in the present embodiment, X, Y and Z directions are all with reference to the longitudinal beam rear section body, X direction is the length direction of the longitudinal beam rear section body, Y direction is the width direction of the longitudinal beam rear section body, Z direction is the height direction of the longitudinal beam rear section body, and upper, lower, top and bottom are also with reference to the longitudinal beam rear section body, and in the present embodiment, they are the upper and top described in the lower embodiment in the drawings Figure 2 , but the front and back directions are with reference to the direction of travel of the vehicle, wherein front is the front of the direction of travel of the vehicle, corresponding to the right side being front and the left side being rear in the drawings Figure 1 in the present embodiment, the above positional description is only for the convenience of understanding the present application, and is not a limitation; the connection, mounting and the like in the present embodiment can be any common connection mode such as welding, riveting, etc. if not otherwise specified, which can be understood by those skilled in the art and will not be described here.

[0025] The utility model discloses a kind of rear section of longitudinal beam and rear floor lower crossbeam connecting structure, including longitudinal beam rear section body 8, lower crossbeam body 6 and longitudinal beam reinforcing member, longitudinal beam reinforcing member is set to longitudinal beam rear section body 8, longitudinal beam reinforcing member and longitudinal beam rear section body 8 form cavity, lower crossbeam body 6 is connected in longitudinal beam reinforcing member.In this embodiment, longitudinal beam reinforcing member is provided on longitudinal beam rear section body 8, lower crossbeam body 6 is not directly connected to longitudinal beam rear section body 8, but is connected to longitudinal beam reinforcing member, and cavity is also formed between longitudinal beam reinforcing member and longitudinal beam rear section body 8, the structure not only realizes the strengthening of structural rigidity at connecting position, but also can effectively absorb energy and reduce vibration, reduce the transmission of vibration to lower crossbeam body 6, effectively reduce the excitation of auxiliary frame to vehicle body side, effectively improve the driving comfort of passenger compartment.

[0026] In this embodiment, it also includes connecting assembly, and the connecting assembly includes lower connecting plate 5, and the lower crossbeam body 6 is connected to the longitudinal beam reinforcing member through the lower connecting plate 5.In this embodiment, the connecting assembly also includes upper connecting plate 3, the upper connecting plate 3 is covered in the lower connecting plate 5, the upper connecting plate 3 and the lower connecting plate 5 form the hollow cavity structure, and the upper connecting plate 3 is overlapped on the top surface of the longitudinal beam reinforcing member.In this embodiment, the connecting assembly also includes connecting plate inner reinforcing plate 4, the connecting plate inner reinforcing plate 4 is arranged at the position between the upper connecting plate 3 and the lower connecting plate 5, one end of the connecting plate inner reinforcing plate 4 along Y direction is attached to the bottom surface of the upper connecting plate 3, and the other end of the connecting plate inner reinforcing plate 4 along Y direction is attached to the top surface of the lower connecting plate 5.As shown in the figure, the upper connecting plate 3 and the lower connecting plate 5 in this embodiment are both sheet metal parts of "J" type structure, the upper connecting plate 3 is covered from top to bottom along Z direction in the lower connecting plate 5 to form the hollow cavity structure, the lower edge of the upper connecting plate 3 is attached to the middle part of the side wall of the lower connecting plate 5, the lower edge of the lower connecting plate 5 is provided with a flange structure, and the side of the lower connecting plate 5 away from the longitudinal beam rear section body 8 is conformable and overlapped with the lower crossbeam body 6 and then connected by welding.A connecting plate inner reinforcing plate 4 is arranged in the cavity of the upper connecting plate 3 and the lower connecting plate 5, which separates the cavities of the upper connecting plate 3 and the lower connecting plate 5 and strengthens the structure, and the side of the connecting plate inner reinforcing plate 4 close to the longitudinal beam rear section body 8 is an open box structure as shown in the figure, wherein the side close to the longitudinal beam rear section body 8 is open, and the side of the connecting plate inner reinforcing plate 4 close to the longitudinal beam rear section body 8 is attached to the inner wall surface of the cavity of the upper connecting plate 3 (here, the attachment means that the top surface of the outer surface of the connecting plate inner reinforcing plate 4 is attached to the top surface of the cavity of the upper connecting plate 3, and the side surface of the outer surface of the connecting plate inner reinforcing plate 4 is attached to the side surface of the cavity of the upper connecting plate 3, as shown in the figure).The side of the connecting plate frame reinforcing plate away from the longitudinal beam rear section body 8 is continuously bent and attached to the top surface of the lower connecting plate 5 and then connected by welding and the like.

[0027] In this embodiment, the longitudinal beam reinforcing member includes a reinforcing cover plate 2 and a support plate 1. The reinforcing cover plate 2 includes an integrally formed top plate 201 and a side plate 202. The top periphery of the support plate 1 is attached to the bottom surface of the top plate 201 of the reinforcing cover plate 2 through a flange structure and is connected by welding. The support plate 1 and the side plate 202 are respectively disposed at both ends of the top plate 201 in the Y direction so that the longitudinal beam reinforcing member has a downward-opening "U" shaped structure. The rear section body 8 of the longitudinal beam is a cavity structure with an open bottom, and the longitudinal beam reinforcing member is conformally fitted to the rear section body 8 of the longitudinal beam. After the longitudinal beam reinforcing member is covered from top to bottom on the rear section body 8 of the longitudinal beam, a cavity is formed in the upper part of the rear section body 8 of the longitudinal beam. The bottom periphery of the rear section body 8 of the longitudinal beam, the support plate 1 and the side plate 202 are all provided with flange structures. The flanges of the support plate 1 and the side plate 202 overlap on the flanges on both sides of the rear section body 8 of the longitudinal beam in the Y direction as shown in the figure and are connected by welding. The top surface of the top plate 201 is recessed downwards to form an overlapping groove. The upper connecting plate 3 extends towards the rear section of the longitudinal beam 8 and overlaps in the overlapping groove on the top surface of the top plate 201. The end of the lower connecting plate 5 facing the rear section of the longitudinal beam 8 is attached to the outer surface of the side plate 202 through a flange structure and connected to the side plate 202 by welding. In this embodiment, the two ends of the top plate 201 in the X direction respectively extend towards the rear section of the longitudinal beam 8 to form supporting flanges 203. The supporting flanges 203 extend all the way to the surface of the rear section of the longitudinal beam 8. The bottom side of the supporting flanges 203 is bent and attached to the top surface of the rear section of the longitudinal beam 8 and connected to the top surface of the rear section of the longitudinal beam 8 by welding.

[0028] In this embodiment, an inner reinforcing plate 7 is also included. The inner reinforcing plate 7 is positioned within the cavity of the rear section of the longitudinal beam body 8, corresponding to the position of the longitudinal beam reinforcing member. The inner reinforcing plate 7 has a flanged structure in the width direction (Y direction) of the rear section of the longitudinal beam body 8. The flanged structure of the inner reinforcing plate 7 is attached to the side wall of the cavity of the rear section of the beam body and fixed by welding. The inner reinforcing plate 7 divides the cavity of the rear section of the longitudinal beam body 8 in the Z direction to form two chambers. The rear part of the inner reinforcing plate 7 in the X direction is bent towards the top of the rear section of the longitudinal beam body 8, and after bending, it is attached to the top surface of the cavity of the rear section of the longitudinal beam body 8 to further improve structural rigidity.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A connection structure between the rear section of a longitudinal beam and the transverse beam under the rear floor, characterized in that: It includes a rear section of the longitudinal beam body, a lower crossbeam body, and a longitudinal beam reinforcing member. The longitudinal beam reinforcing member is disposed on the rear section of the longitudinal beam body, and the longitudinal beam reinforcing member and the rear section of the longitudinal beam body form a cavity. The lower crossbeam body is connected to the longitudinal beam reinforcing member.

2. The connection structure between the rear section of the longitudinal beam and the transverse beam under the rear floor as described in claim 1, characterized in that: It also includes a connecting component, which includes a lower connecting plate, through which the lower crossbeam body is connected to the longitudinal beam reinforcing member.

3. The connection structure between the rear section of the longitudinal beam and the rear floor under-beam as described in claim 2, characterized in that: The connecting assembly also includes an upper connecting plate, which covers the lower connecting plate. The upper connecting plate and the lower connecting plate form a hollow cavity structure, and the upper connecting plate overlaps the top surface of the longitudinal beam reinforcing member.

4. The connection structure between the rear section of the longitudinal beam and the transverse beam under the rear floor as described in claim 3, characterized in that: The longitudinal beam reinforcing member includes a reinforcing cover plate and a support plate. The reinforcing cover plate includes an integrally formed top plate and a side plate. The support plate is connected to the top plate of the reinforcing cover plate. The support plate and the side plate are respectively disposed at both ends of the top plate in the Y direction so that the longitudinal beam reinforcing member has a downward-opening "U"-shaped structure. The longitudinal beam reinforcing member covers the rear section of the longitudinal beam body from top to bottom and forms a cavity in the upper part of the rear section of the longitudinal beam body.

5. The connection structure between the rear section of the longitudinal beam and the rear floor under-beam as described in claim 4, characterized in that: The upper connecting plate overlaps the top surface of the top plate, and the lower connecting plate is connected to the side plate.

6. The connection structure between the rear section of the longitudinal beam and the rear floor under-beam according to claim 4, characterized in that: The two ends of the top plate in the X direction extend toward the rear section of the longitudinal beam to form supporting flanges, which are connected to the top surface of the rear section of the longitudinal beam.

7. The connection structure between the rear section of the longitudinal beam and the rear floor under-beam as described in claim 3, characterized in that: The connecting assembly further includes an inner reinforcing plate, which is disposed between the upper connecting plate and the lower connecting plate. One end of the inner reinforcing plate along the Y direction is attached to the bottom surface of the upper connecting plate, and the other end of the inner reinforcing plate along the Y direction is attached to the top surface of the lower connecting plate.

8. The connection structure between the rear section of the longitudinal beam and the transverse beam under the rear floor as described in claim 1, characterized in that: It also includes an inner reinforcing plate for the longitudinal beam. The rear section of the longitudinal beam body has a cavity structure with an open bottom. The inner reinforcing plate for the longitudinal beam is disposed in the cavity of the rear section of the longitudinal beam body at the position corresponding to the reinforcing member of the longitudinal beam. The inner reinforcing plate for the longitudinal beam divides the cavity of the rear section of the longitudinal beam body in the Z direction.

9. The connection structure between the rear section of the longitudinal beam and the rear floor under-beam as described in claim 8, characterized in that: The rear part of the reinforcing plate in the X direction of the longitudinal beam is bent towards the top of the rear section of the longitudinal beam body and fits against the top surface of the cavity of the rear section of the longitudinal beam body.

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