CN217893025U - Vehicle body rear structure and vehicle - Google Patents

Abstract

The utility model provides a vehicle body rear portion structure (10), including holding portion (15), a pair of back longeron (13) and back sub vehicle frame (16). The storage section (15) is provided at the rear of the vehicle body, and the bottom section (15 a) is provided with a reinforcing beam (31) extending in the vehicle width direction. The pair of rear side members (13) are respectively disposed on both sides of the accommodating portion (15) and each extend in the front-rear direction. The rear subframe (16) is connected to the rear longitudinal member (13) by a first connecting member (18). The first connecting member (18) is connected to the reinforcing beam (31). The reinforcing beam (31) is connected to the towing hook (35). This effectively improves the rigidity and rear traction strength of the entire vehicle body rear structure (10).

Description

Vehicle body rear structure and vehicle

Technical Field

The utility model relates to a vehicle body rear portion structure reaches vehicle including this vehicle body rear portion structure.

Background

There is known a vehicle body rear structure including a receiving portion for receiving a spare tire or other articles. A reinforcing beam extending in the vehicle width direction is provided at the bottom of the accommodating portion to reinforce the strength of the accommodating portion. The reinforcing beam is also used for arranging a towing hook to ensure the towing strength.

However, for example, when the vehicle is large, and the weight of the vehicle is large due to a large number of devices and parts on the vehicle, there is a risk that the required strength of the housing portion or the traction strength cannot be secured.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a can further improve automobile body rear portion structure of intensity.

The utility model discloses the first aspect provides a vehicle body rear portion structure, include: the accommodating part is arranged at the rear part of the vehicle body, and the bottom of the accommodating part is provided with a reinforcing beam extending along the vehicle width direction; the pair of rear longitudinal beams are respectively arranged on two sides of the accommodating part and extend along the vehicle length direction; and the rear auxiliary frame is connected with the rear longitudinal beam through a first connecting piece. The first connecting member is connected to the reinforcing beam.

With the structure, when the accommodating part or the reinforcing beam is collided or pulled, the force can be easily transmitted to the rear auxiliary frame and the rear longitudinal beam through the first connecting piece, so that the strength and the rigidity of the whole structure at the rear part of the vehicle body can be improved, the strength and the rigidity of the accommodating part can be improved, and the capacity of resisting collision or pulling is improved.

In addition, by connecting the first connecting member and the reinforcing beam together to increase the strength and rigidity, an increase in the weight of the entire vehicle can be avoided, for example, as compared with a manner in which the strength and rigidity are increased by widening the reinforcing beam.

In particular, in the case where the accommodating portion is provided with a towing hook connected to the reinforcing beam, the above configuration can improve the rear towing strength. And compared with the mode of improving the rear traction strength by widening the reinforcing beam, the increase of the weight of the whole vehicle can be avoided.

As a possible implementation manner of the first aspect, the rear side member includes a first beam and a second beam that are connected to each other in the vehicle length direction, the second beam is disposed behind the first beam, and the first connecting member is connected to a connection portion of the first beam and the second beam.

By adopting the structure, the rigidity and the strength of the joint of the first beam and the second beam can be enhanced by the first connecting piece, so that the joint can bear larger load, and the bearing capacity of the rear auxiliary frame connected with the rear longitudinal beam is improved. Further, at the time of a rear collision, the collision force can be effectively dispersed from the second beam to the first beam and the rear subframe.

As a possible implementation manner of the first aspect, both ends of the reinforcement beam are connected to the rear side members, respectively.

With the above configuration, the collision force or traction force at the time of rear collision or traction can be further dispersed to the rear side member, and the rear traction strength and the overall rigidity can be further improved.

As a possible implementation manner of the first aspect, the vehicle body rear structure is further provided with a second connecting member, one end of the second connecting member is connected to the reinforcing beam, and the other end of the second connecting member is connected to the rear sub frame.

With the above structure, the strength and rigidity of the vehicle body rear structure can be further improved, and the collision force can be better dispersed to the rear sub frame when a rear collision occurs or rear traction is performed.

As a possible implementation manner of the first aspect, the rear subframe is provided with a rear longitudinal beam fixing portion, the rear longitudinal beam fixing portion is connected to the rear longitudinal beam through the first connecting member and connected to the other end of the second connecting member, and the rear longitudinal beam fixing portion is located between the first connecting member and the second connecting member.

By adopting the structure, the rear auxiliary frame is respectively connected with the rear longitudinal beam and the reinforcing beam through the first connecting piece and the second connecting piece to form a triangular connecting structure, so that the stability of the rear structure of the vehicle body can be enhanced, and the rear traction strength and the overall rigidity can be improved.

In one possible implementation of the first aspect, the reinforcement beam includes a cross member and a side member that are connected to each other, the cross member is provided at a bottom portion of the accommodating portion and extends in the vehicle width direction, and one end of the side member is connected to the cross member and the other end is connected to the second beam.

With the above configuration, the side members of the reinforcing beam are connected to the second beam, and not only can the collision force at the time of a rear collision be dispersed to the reinforcing beam, but also the rear traction strength and the overall rigidity can be improved.

As a possible implementation manner of the first aspect, a second connecting member is further provided, one end of the second connecting member is connected to a joint of the lateral member and the side member, and the other end of the second connecting member is connected to the rear subframe.

With the above configuration, the strength of the joint between the lateral member and the side member can be increased by the second link, and the rear traction strength and the overall rigidity can be further improved.

In one possible implementation of the first aspect, the first connecting member is connected to the reinforcement beam by a first fixing portion, the first fixing portion includes a first fixing side portion extending in the vehicle length direction and connected to a surface of the reinforcement beam extending in the vehicle length direction, and a second fixing side portion extending in the vehicle width direction and connected to a surface of the reinforcement beam extending in the vehicle width direction.

With the above configuration, the first connecting member is fixed to the reinforcing beam by the first fixing edge and the second fixing edge extending in a crossing manner, so that the fixing strength can be improved. In addition, the first connecting piece is connected to the surface of the reinforcing beam extending along the vehicle length direction and the surface of the reinforcing beam extending along the vehicle width direction through the first fixing portion, so that the connecting strength between the first connecting piece and the reinforcing beam can be increased, and the rear traction strength and the overall rigidity can be effectively improved.

As a possible implementation manner of the first aspect, a plurality of grooves extending in the vehicle height direction are formed on the side wall of the second beam.

With the above configuration, in the event of a rear collision, the second beam is crushed and deformed to absorb a part of the collision force, and then the collision force is distributed to the rear sub frame and the first beam, so that the influence of the collision force on the members mounted on the underbody such as the battery pack can be reduced.

As a possible implementation manner of the first aspect, a towing hook is further provided, and the towing hook is connected with the reinforcing beam.

By adopting the structure, the rear traction strength can be effectively improved.

A second aspect of the present invention provides a vehicle, including the vehicle body rear portion structure of any one of the first aspect.

With the vehicle of the second aspect, the same technical effects as those of the first aspect can be obtained, and the description will not be repeated here.

Drawings

The various technical features of the present application and the relationship between them are further explained below with reference to the drawings. The drawings are exemplary, some technical features are not shown in actual scale, and some technical features that are commonly used in the technical field of the present application and are not essential to understanding and implementing the present application may be omitted or additionally shown, that is, the combination of the technical features shown in the drawings is not used for limiting the present application. In addition, the same reference numerals are used throughout the application. The specific drawings are illustrated below:

fig. 1 is a schematic perspective view showing a vehicle body rear structure according to an embodiment of the present invention, as viewed from below.

Fig. 2 is a schematic plan view showing a vehicle body rear structure provided in an embodiment of the present invention, as viewed from below.

Fig. 3 is a schematic structural view showing a first connecting member of a vehicle body rear structure and its periphery according to an embodiment of the present invention.

Fig. 4 is a schematic structural view showing a first connecting member of a vehicle body rear structure and its periphery according to an embodiment of the present invention.

Fig. 5 is a schematic structural view illustrating a rear side member of a vehicle body rear structure according to an embodiment of the present invention.

Fig. 6 is a schematic structural view showing a rear side member and its periphery of a vehicle body rear structure according to an embodiment of the present invention.

Fig. 7 is a schematic structural view showing the inside of a rear side member of a vehicle body rear structure according to an embodiment of the present invention.

Fig. 8 is a schematic structural view showing the inside of a rear side member of a vehicle body rear structure according to an embodiment of the present invention.

Fig. 9 is a schematic structural view showing the inside of a rear side member of a vehicle body rear structure according to an embodiment of the present invention.

Detailed Description

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description and the drawings, directions such as front, rear, left, right, up and down are defined with reference to a driver seated in a vehicle, however, these directions are defined for convenience of description and are not limitations of the present invention. The front-rear direction corresponds to the vehicle length direction, the left-right direction corresponds to the vehicle width direction, and the up-down direction corresponds to the vehicle height direction.

As shown in fig. 1, 2, and the like, an embodiment of the present invention provides a vehicle body rear structure 10 including a receiving portion 15, a pair of rear side members 13, and a rear sub frame 16. The accommodating portion 15 is provided at the rear of the vehicle body, and the bottom portion 15a is provided with a reinforcing beam 31 extending in the vehicle width direction. The accommodating portion 15 is used to accommodate, for example, a spare tire or other articles. The pair of rear side members 13 are respectively provided on both sides of the accommodating portion 15, and each extend in the vehicle length direction. The rear floor 11 is connected between the pair of rear side members 13, and the accommodating portion 15 is provided at a rear end portion of the rear floor 11. The rear subframe 16 is connected to the rear longitudinal member 13 by a first connecting member 18. The first connecting member 18 is connected to the reinforcing beam 31. Specifically, the rear subframe 16 is located forward of the accommodating portion 15.

With this structure, the first connecting member 18 connecting the rear sub-frame 16 and the rear side member 13 is connected to the reinforcing beam 31 provided in the accommodating portion 15, so that when the accommodating portion 15 or the reinforcing beam 31 is subjected to a collision or a pull, the force can be easily transmitted to the rear sub-frame 16 and the rear side member 13 via the first connecting member 18, and thus the strength and rigidity of the entire vehicle body rear portion structure 10 can be improved, and the strength and rigidity of the accommodating portion 15 can be improved, and the ability to withstand the collision or the pull can be improved.

In addition, the above structure can increase the strength and rigidity by connecting the first connecting member 18 and the reinforcing beam 31 together, for example, can avoid an increase in the weight of the entire vehicle as compared with a manner of increasing the strength and rigidity by widening the reinforcing beam 31.

In particular, in the case where the receiving portion 15 is provided with a towing hook connected to the reinforcing beam 31, the above configuration can improve the rear towing strength. And an increase in the weight of the entire vehicle can be avoided as compared with a method of improving the rear traction strength by widening the reinforcing beam 31.

As shown in fig. 3, 4, and the like, as one example, the rear side member 13 includes a first beam 130 and a second beam 131 connected to each other in the vehicle length direction. The second beam 131 is located behind the first beam 130. Specifically, the first beam 130 is offset from the accommodating portion 15, and the second beam 131 is disposed opposite to the accommodating portion 15. The first beam 130 and the second beam 131 are fixedly connected together, preferably by welding. The first connecting member 18 is connected to a junction of the first beam 130 and the second beam 131. The first connecting member 18 is connected to both the first beam 130 and the second beam 131. Specifically, the junction of the first beam 130 and the second beam 131 is located in front of the accommodating portion 15.

With this structure, the first connecting member 18 can increase the rigidity and strength of the joint between the first beam 130 and the second beam 131, so that a large load can be borne therein, and the load-bearing capacity of the rear subframe 16 connected to the rear side member 13 can be improved. Also, at the time of a rear collision, the collision force can be effectively dispersed from the second beam 131 to the first beam 130 and the rear subframe 16.

Alternatively, as shown in fig. 7 to 9, as an embodiment, both ends of the reinforcing beam 31 are respectively connected to the rear longitudinal beams 13, specifically, the reinforcing beam is connected to the second beam 131 in this embodiment, and the connection manner is, for example, welding.

With this structure, the reinforcement beam 31 can reinforce the lateral rigidity of the rear floor 11 together with the rear sub-frame 16, and both ends of the reinforcement beam 31 are connected to the rear side member 13, so that the collision force or traction force at the time of rear collision or traction can be further dispersed to the rear side member 13, whereby the rear traction strength and the overall rigidity can be further improved.

Optionally, referring to fig. 1 and 2, as an embodiment, the vehicle body rear structure 10 is further provided with a second connecting member 39. The second connecting member 39 has one end connected to the reinforcing beam 31 and the other end connected to the rear sub frame 16.

With this structure, the strength and rigidity of the vehicle body rear structure 10 can be further improved, and the collision force can be more favorably dispersed to the rear sub frame 16 in the event of a rear collision or rear traction.

Alternatively, referring to fig. 1 and 2, as an embodiment, the rear subframe 16 is provided with a rear side member fixing portion 19. The rear side member fixing portion 19 is connected to the rear side member 13 via the first link 18, and is connected to the other end of the second link 39. The rear side member fixing portion 19 is located between the first connecting member 18 and the second connecting member 39.

With this structure, the rear subframe 16 is connected to the rear side member 13 and the reinforcing beam 31 via the first connecting member 18 and the second connecting member 39, respectively, to form a triangular connecting structure, which can enhance the stability of the vehicle body rear structure 10 and improve the rear traction strength and the overall rigidity.

Optionally, referring to fig. 1 and 2, as an embodiment, the vehicle body rear structure 10 further includes a first bolt 20. The first bolt 20 passes through the first connecting member 18, the rear side member fixing portion 19, and the second connecting member 39 to fix them together.

With this structure, the first connecting member 18, the rear side member fixing portion 19, and the second connecting member 39 can be effectively fixed together, and the rear subframe 16, the rear side member 13, and the reinforcing beam 31 can be connected together, effectively improving the rear traction strength and the overall rigidity. In addition, the first connecting member 18 and the rear subframe 16 are fixed and the second connecting member 39 and the rear subframe 16 are fixed at the same time by the first bolt 20, so that the structure can be simplified and the space occupation can be reduced.

Alternatively, referring to fig. 1 and 2, as an example, one end of the second connecting member 39 is provided with a through hole 39a, and the vehicle body rear structure 10 further includes a second bolt, and one end of the second connecting member 39 is fixed to the reinforcing beam 31 by passing the second bolt through the through hole 39a.

With this structure, the rear sub-frame 16 and the reinforcing beam 31 can be effectively connected, and the rear traction strength and the overall rigidity can be improved. Further, since the second connecting members 39 are bolted, even when the second connecting members 39 are first installed, the rear subframe 16 can be installed in a subsequent process, and the flexibility of the assembly operation of the vehicle body rear portion structure 10 is improved.

Alternatively, referring to fig. 5, 7-9, as an embodiment, the second beam 131 is a hollow structure, and the upper end of the pipe nut 21 supporting the first connector 18 is inserted into the second beam 131 and fixed to the second beam 131 by the bracket 22.

With this structure, the pipe nuts 21 fixed to the second beam 131 are engaged with the bolts 20, so that the rear subframe 16, the rear side member 13, and the reinforcing beam 31 are effectively connected together, and the rear traction strength and the overall rigidity are effectively improved.

Optionally, referring to fig. 5, 7-9, as one embodiment, the tube nut 21 has a flange 21a at the lower end. The flange 21a is located below the second beam 131 and abuts against the upper surface of the first connecting member 18.

With this structure, the first connector 18 can be supported by the pipe nut 21, and the connection stability of the first connector 18 and the rear subframe 16 can be ensured.

Alternatively, referring to fig. 1 to 4 and the like, as one example, the reinforcing beam 31 has a lateral member 31a and a side member 31b connected to each other. The cross member 31a is provided at the bottom portion 15a of the accommodating portion 15 and extends in the vehicle width direction. One end of the side member 31b is connected to the cross member 31a, and the other end is connected to the second beam 131. The lateral member 31a has side members 31b at both ends thereof, and the side members 31b are provided at the side portions of the accommodating portion 15 and extend in the vehicle height direction.

With this structure, the side members 31b of the reinforcing beam 31 are connected to the second beam 131, and the collision force or traction force at the time of rear collision or traction can be further dispersed to the rear side frame 13, so that the rear traction strength and the overall rigidity can be further improved.

Optionally, referring to fig. 1 and 2, as an embodiment, the vehicle body rear structure 10 is further provided with a second connecting member 39. One end of the second link 39 is connected to the joint between the cross member 31a and the side member 31b, and the other end is connected to the rear subframe 16.

With this configuration, the strength of the joint between the lateral member 31a and the side member 31b can be increased by the second link 39, and the rear traction strength and the overall rigidity can be further improved.

Alternatively, referring to fig. 1 and 2, as an embodiment, the first connecting member 18 is fixed to the reinforcing beam 31 by a first fixing portion 18 a. The first fixing portion 18a includes a first fixing side portion 18a1 and a second fixing side portion 18a2. The first fixed side portion 18a1 extends in the vehicle length direction and is connected to a surface of the reinforcing beam 31 extending in the vehicle length direction. The second fixed side portion 18a2 extends in the vehicle width direction and is connected to a surface of the reinforcement beam 31 extending in the vehicle width direction. Preferably, the first fixing edge 18a1 and the second fixing edge 18a2 are welded to the surface of the reinforcing beam 31.

With this configuration, the first connector 18 is fixed to the reinforcing beam 31 by the first fixed side portion 18a1 and the second fixed side portion 18a2 extending crosswise, and thus the fixing strength can be improved.

In addition, the first connector 18 is connected to the surface of the reinforcing beam 31 extending in the vehicle length direction and the surface of the reinforcing beam 31 extending in the vehicle width direction via the first fixing portion 18a, so that the connection strength between the first connector 18 and the reinforcing beam 31 can be increased, and the rear traction strength and the overall rigidity can be effectively improved.

Alternatively, referring to fig. 5, 6, and the like, as one embodiment, a plurality of grooves 131c extending in the vehicle height direction are formed on the side wall of the second beam 131. By providing a plurality of grooves 131c, the second beam 131 is waved.

With this structure, in the event of a rear collision, the second beam 131 is crushed and deformed to absorb a part of the collision force, and then the collision force is dispersed to the rear sub frame 16 and the first beam 130, whereby the influence of the collision force on the vehicle body floor-mounted members such as the battery pack can be reduced.

Alternatively, referring to fig. 1-4 and the like, as one embodiment, the vehicle body rear structure 10 has a towing hook 35. The towing hook 35 is connected to the reinforcing beam 31. A reinforcing member 30 is provided at the bottom 15a of the accommodating portion 15, and the reinforcing member 30 and the reinforcing beam 31 are connected in a T-shape. The pulling hook 35 is provided on the reinforcing member 30.

With this structure, the towing hook 35 is connected to the rear sub-frame 16 and the second beam 131 through the reinforcing beam 31, and the rear towing strength can be effectively improved.

Fig. 1-9 illustrate one embodiment of the present invention, which is described in detail below.

Fig. 1 is a perspective view of a vehicle body rear structure 10 provided in the present embodiment, as viewed from below. Fig. 2 is a schematic plan view of the vehicle body rear structure 10 as viewed from below.

As shown in fig. 1 and 2, the vehicle body rear structure 10 generally includes a rear floor 11, a pair of rear side members 13, and a rear sub-frame 16.

The pair of rear side members 13 are provided on the left and right sides of the rear floor 11, respectively, and extend in the front-rear direction. The pair of rear side members 13 are provided at the left and right end portions of the rear floor panel 11.

An accommodating portion 15 is provided at the rear end portion of the rear floor 11. The accommodating portion 15 is located between the rear portions of the left and right rear side members 13. That is, the rear side frames 13 are disposed on both sides of the accommodating portion 15.

The accommodating portion 15 is for accommodating a spare tire or other articles. As shown in fig. 1, the accommodating portion 15 is recessed downward in a state lower than the front portion of the rear floor 11, is recessed as viewed from above, is raised as viewed from below, and has a substantially rectangular bottom wall, a front wall, and left and right side walls, the upper and rear being open. The rear of the housing 15 is closed by a rear end plate not shown.

A reinforcing beam 31 is provided on the bottom portion 15a of the accommodating portion 15, and the entire reinforcing beam 31 extends in the left-right direction to reinforce the bottom portion 15 a. In the present embodiment, the reinforcing beam 31 is fixed on the outer surface of the accommodating portion 15. The "outer surface" herein refers to a surface on the opposite side to the storage side.

In the present embodiment, although not shown, the reinforcing beam 31 is a member having a hat-shaped cross section and is fixed to the outer surface of the accommodating portion 15 to form a closed cross section with the accommodating portion 15.

As shown in fig. 1 and 2, the reinforcing beam 31 includes a cross member 31a and a pair of side members 31b connected to each other. The cross member 31a is provided at the bottom portion 15a of the accommodating portion 15, and extends in the left-right direction. The pair of side members 31b are provided at both ends of the cross member 31a, respectively. The pair of side members 31b are provided on the left and right outer surfaces of the accommodating portion 15, respectively, are positioned on the left and right sides of the cross member 31a, extend in the vertical direction, have upper end portions connected to the rear side member 13, and have lower end portions bent inward in the left and right direction and connected to both left and right end portions of the cross member 31a by, for example, welding.

A reinforcing member 30 is also fixed to the bottom portion 15a of the accommodating portion 15. The reinforcing member 30 extends in the front-rear direction, and the front end is fixed to the center portion in the left-right direction of the reinforcing beam 31. The reinforcing member 30 and the reinforcing beam 31 are assembled and fixed in a substantially T-shape.

A hook 35 is provided on the reinforcing member 30. The towing hook 35 is used, for example, to tow other vehicles by a rope. The towing hook 35 is formed by bending an elongated cylindrical metal rod. The towing hook 35 may be fixed to the reinforcing member 30 by welding.

The rear subframe 16 is disposed between the pair of rear side frames 13, below a portion of the rear floor panel 11 forward of the receiving portion 15, and has a substantially cross shape, for example, for supporting an engine and/or a power motor. The rear sub frame 16 is provided on the bottom surface of the rear side member 13. The rear subframe 16 is a partial frame that fixes the drive motor and/or the engine to the underbody.

The rear subframe 16 is connected to the rear longitudinal member 13 by a first connecting member 18. The rear subframe 16 has side frame members 16c, 16d extending in the front-rear direction. The rear subframe 16 has a front cross member 16a and a rear cross member 16b. The front cross member 16a extends in the left-right direction and is fixed to the front ends of the side frame members 16c, 16d. The rear cross member 16b extends in the left-right direction and is fixed to the rear ends of the side frame members 16c, 16d. The side frame members 16c and 16d are fixed to the left and right rear side frames 13 so as to partially overlap the left and right rear side frames 13 in the vertical direction.

Fig. 3 and 4 are schematic views showing the first connecting member 18 and its periphery. As shown in fig. 3 and 4, the first connecting member 18 is a pair of left and right members. The left first connecting member 18 connects the rear subframe 16 to the left rear side member 13, and the right first connecting member 18 connects the rear subframe 16 to the right rear side member 13.

The first connecting member 18 is fixedly connected to the reinforcing beam 31. The first connector 18 includes a support portion 18d, a first fixing portion 18a, a second fixing portion 18b, and a third fixing portion 18c. The support portion 18d supports the rear side member fixing portion 19 of the rear subframe 16, and is formed in a substantially cylindrical shape having a small vertical height, and projects downward with respect to its surrounding portion. The first connecting member 18 is fixed to the reinforcing beam 31 by the first fixing portion 18 a. The first connecting member 18 is fixed to the rear side member 13 by the second fixing portion 18b and the third fixing portion 18c.

The first fixing portion 18a includes a first fixing side portion 18a1 and a second fixing side portion 18a2. The first fixed side portion 18a1 and the second fixed side portion 18a2 are provided on the inner side of the first connector 18 in the left-right direction, and are erected in the up-down direction to form hems. The first fixing edge 18a1 and the second fixing edge 18a2 are continuous with each other in a substantially right-angle shape.

The first fixing side portion 18a1 extends in the front-rear direction and is connected to a surface of the reinforcing beam 31 extending in the front-rear direction. The first fixed side portion 18a1 of the left first connecting member 18 is connected to the left surface of the reinforcing beam 31. The first fixed side portion 18a1 of the right first connecting member 18 is connected to the right surface of the reinforcing beam 31. Preferably, the connection means may be welding. Of course, other connection methods than welding, for example, a bolt method, may be employed.

The second fixing side portion 18a2 extends in the left-right direction and is connected to a surface of the reinforcing beam 31 extending in the left-right direction. The second fixed side portion 18a2 of the left first connecting member 18 and the second fixed side portion 18a2 of the right first connecting member 18 are connected to the front surface of the reinforcing beam 31. Alternatively, the second fixed side portion 18a2 may be connected to the rear surface of the reinforcing beam 31, or a second fixed side portion connected to both the front surface and the rear surface may be provided. Preferably, the connection means may be welding. Of course, other connection methods than welding, for example, a bolt method, may be employed.

In the present embodiment, the first connecting member 18 connecting the rear sub-frame 16 and the rear side member 13 is fixedly connected to the reinforcing beam 31 provided in the accommodating portion 15, so that when a force is applied to the accommodating portion 15 or the reinforcing beam 31, the force can be transmitted to the rear sub-frame 16 and the rear side member 13 via the first connecting member 18, and thus the strength and rigidity of the entire accommodating portion 15 and the vehicle body rear structure 10 can be enhanced, and the ability to withstand collision and pulling can be improved.

In addition, the first connecting member 18 is fixed to the reinforcing beam 31 by welding, so that the first connecting member 18 can be easily fixed to the reinforcing beam 31 in a limited space. Moreover, the welding method can reduce the cost compared with the bolt method.

Further, the first connector 18 is fixed to the reinforcing beam 31 by the first fixing side portion 18a1 and the second fixing side portion 18a2 extending crosswise, so that the fixing strength can be improved, and the capacity of the accommodating portion 15 to withstand collision and pulling can be further improved.

Fig. 5 is a structural schematic view of the rear side member 13. As shown in fig. 5, the rear side member 13 has the following shape: the curved portion is curved from the top portion to be inclined more gradually downward while gradually inclining upward from the front end to the rear end, and extends substantially horizontally at the rear end. The rear side member 13 has a hollow structure and a hollow cross section. The hollow cross section is, for example, a rectangular cross section, but is not limited thereto, and may be a polygonal cross section such as a pentagon other than a rectangle as long as it has at least an upper wall, a lower wall, and left and right side walls.

The rear side member 13 includes a first beam 130 and a second beam 131. The first beam 130 and the second beam 131 are two separate members and are integrally connected to constitute the rear side member 13. The front end of the second beam 131 is inserted into the rear end of the first beam 130 to be fixed with the first beam 130. The first beam 130 and the second beam 131 are connected by welding. The first beam 130 is formed of a material having a relatively high strength, and the second beam 131 is formed of a material having a relatively low strength.

The first beam 130 extends in the front-rear direction, curves upward from the front end, and then gradually extends obliquely downward from the top while drawing an arc shape while inclining rearward and upward. The second beam 131 is connected to the first beam 130, extends in the front-rear direction behind the first beam 130, and extends substantially horizontally after extending slightly obliquely downward at the front end thereof.

Referring to fig. 3 and 4, the first connecting member 18 is fixed at the junction of the first beam 130 and the second beam 131. The junction of the first beam 130 and the second beam 131 is located in front of the accommodating portion 15. Referring also to fig. 5, the first connector 18 is disposed across the boundary 23 of the first beam 130 and the second beam 131. The first connecting member 18 is fixed to the first beam 130 by the second fixing portion 18b and fixed to the second beam 131 by the third fixing portion 18c.

The second beam 131 of the left and right rear side frames 13 is connected to both left and right ends of the reinforcing beam 31. Specifically, the upper end portions of the side members 31b of the reinforcing beam 31 are connected to the second beam 131.

The left and right side walls (side walls) of the second beam 131 are wavy in a top view or a bottom view. The second beam 131 is provided at left and right sidewalls thereof with a plurality of grooves 131c, respectively. The grooves 131c are formed extending in the up-down direction on the left and right side walls of the middle rear portion of the second beam 131. The concave groove 131c is formed by recessing the left and right side walls of the second beam 131 inward. The groove 131c on the left side wall of the second beam 131 coincides with the groove 131c on the right side wall in position in the front-rear direction. Thus, when a rear collision occurs in the vehicle, the portion where the concave groove 131c is formed is deformed (crushed or the like) to absorb the collision force, and the excessive collision force is prevented from being transmitted forward to affect the components such as the battery pack on the vehicle front floor.

Referring again to fig. 1 and 2, the vehicle body rear structure 10 is further provided with a second connecting member 39. The second connecting member 39 has one end connected to the reinforcing beam 31 and the other end connected to the rear sub frame 16. As described above, the rear sub frame 16 is also connected to the rear side member 13 via the first connecting member 18. Thus, the rear subframe 16, the rear side member 13, and the reinforcement beam 31 are integrally connected by the first connecting member 18 and the second connecting member 39. This connection structure will be described in detail below.

As shown in fig. 1, the rear subframe 16 is provided with a rear side member fixing portion 19. The rear side member fixing portion 19 has a substantially cylindrical shape. The rear side member fixing portion 19 is fixed to the rear side member 13 by the first link 18. The rear side member fixing portion 19 is connected to the other end of the second link 39. Specifically, the rear side member fixing portion 19 is connected to an end portion of the second link 39 located on the outer side in the left-right direction. The rear side member fixing portion 19 is located between the first connecting member 18 and the second connecting member 39. The rear side member fixing portion 19 is sandwiched by the first link 18 and the second link 39 in the vertical direction. The upper surface of the rear side member fixing portion 19 is disposed on the support portion 18d of the first link 18.

The vehicle body rear structure 10 is provided with a first bolt 20. Through holes for inserting the first bolts 20 are provided in the other end of the second connecting member 39, the rear side member fixing portion 19, and the first connecting member 18, respectively, and the first bolts 20 are inserted through these through holes to fix the three together. The first bolt 20 is screw-engaged with a pipe nut 21 fixed to the second beam 131.

Fig. 6 is a schematic configuration diagram showing a state in which the pipe nut 21 is fixed to the second beam 131. For clarity, fig. 6 omits the first link 18, the rear side member fixing portion 19, and the like. Although fig. 6 shows only the pipe nut 21 fixed to the left second beam 131, it is understood that the pipe nut 21 is also fixed to the right second beam 131 in the same manner.

As shown in fig. 6, the second beam 131 has a hollow structure. The second beam 131 includes a lower member 131a and an upper member 131b. The lower member 131a has a cross-sectional shape of a hat with an upper opening, and the upper member 131b as a cover member blocks the opening of the lower member 131a, so that the second beam 131 has a hollow cross-sectional shape. The lower member 131a forms a bottom wall, left and right side walls of the second beam 131. The upper member 131b forms an upper wall of the second beam 131.

The pipe nut 21 is cylindrical and has a flange 21a at a lower end. In a state where the pipe nut 21 is fixed to the second beam 131, the upper end of the pipe nut 21 is inserted into the second beam 131 through a through hole provided in the bottom wall of the second beam 131. In this state, the flange 21a is located outside the second beam 131 and below the second beam 131. As explained with reference to fig. 3, the threaded hole 21b of the pipe nut 21 is aligned with the through hole 18e of the first connector 18 for inserting the first bolt 20, and the flange 21a abuts on the surface of the first connector 18 facing the bottom wall of the second beam 131, i.e., the upper surface. Thereby, the flange 21a supports the first connector 18.

Fig. 7 to 9 are schematic structural views showing the fixing manner of the pipe nut 21 inside the second beam 131. For clarity, the lower member 131a of the second beam 131, etc., are omitted from fig. 7-9. The upper end of the pipe nut 21 is fixed to the inside of the rectangular cross-sectional shape of the second beam 131 by a bracket 22, and the pipe nut 21 supports the first connector 18.

As shown in fig. 7 to 9, the pipe nut 21 is fixed to the second beam 131 by the bracket 22. The bracket 22 has a plate shape and a groove 22a extending in the vertical direction at the center, and the groove allows the half of the outer periphery of the pipe nut 21 to be fitted therein. Both ends of the bracket 22 are welded and fixed to the left and right side walls of the second beam 131. The upper end of the pipe nut 21 is fitted into the groove 22a of the bracket 22 and is fixed to the bracket 22 by welding.

Referring again to fig. 1 to 3, the second link 39 is bridged between the rear side member fixing portion 19 and the junction between the side member 31b and the cross member 31a. One end of the second connector 39 is provided with a through hole 39a. Specifically, the outer end portion in the left-right direction of the second link 39 is provided with a through hole 39a. The reinforcing beam 31 is provided with a through hole 31c at the joint between the cross member 31a and the side member 31b. The through-hole 39a of the second connector 39 is aligned with the through-hole 31c of the reinforcing beam 31. The second bolt insertion through hole 39a and the through hole 31c, not shown, are screwed into nuts, not shown, inside the reinforcing beam 31, and one end of the second connector 39 is fixed to the connection point between the side member 31b and the cross member 31a. That is, one end of the second link 39 is fixed to both the side member 31b and the cross member 31a. However, one end of the second link 39 may be fixed to only the cross member 31a. The second link 39 can prevent the rear subframe 16 from falling down during a rear collision, and can improve the rigidity of the entire rear subframe 16.

As described above, the embodiment of the present invention provides a vehicle body rear structure 10 including the accommodating portion 15, the pair of rear side members 13, and the rear sub frame 16. The accommodating portion 15 is provided at the rear of the vehicle body, and the bottom portion 15a is provided with a reinforcing beam 31 extending in the left-right direction. The pair of rear side members 13 are disposed on both sides of the accommodating portion 15 and extend in the front-rear direction. The rear subframe 16 is connected to the rear longitudinal member 13 by a first connecting member 18. The first connecting member 18 is connected to the reinforcing beam 31. The reinforcement beam 31 is connected to a towing hook 35.

The first connecting member 18 is fixed to the reinforcing beam 31 by the first fixing edge 18a1 and the second fixing edge 18a2.

The rear side member 13 includes a first beam 130 and a second beam 131 located rearward of the first beam 130. The first connecting member 18 is connected to a junction of the first beam 130 and the second beam 131. A plurality of grooves 131c extending in the up-down direction are formed on the side wall of the second beam 131.

The reinforcing beam 31 has a cross member 31a and side members 31b. The cross member 31a is provided at the bottom portion 15a of the accommodating portion 15, and extends in the left-right direction. One end of the side member 31b is connected to the cross member 31a, and the other end is connected to the second beam 131.

The rear subframe 16 is provided with a rear side member fixing portion 19, and the rear side member fixing portion 19 is located between the first connecting member 18 and the second connecting member 39. One end of the second link 39 is connected to a joint between the cross member 31a and the side member 31b of the reinforcing beam 31, and the other end is connected to the rear subframe 16.

With the structure of the present embodiment, the rear subframe 16, the reinforcement beam 31, and the rear side member 13 are connected together by the first connecting member 18 and the second connecting member 39 to form a triangular connecting structure, which can enhance the strength and stability of the vehicle body rear structure 10 and can also improve the rear traction strength and the overall rigidity.

In addition, the first connecting member 18 is connected to the joint of the first beam 130 and the second beam 131, and the rigidity and strength of the joint of the first beam 130 and the second beam 131 can be enhanced.

The second beam 131 is provided with a plurality of concave grooves 131c in a wave shape, and can effectively absorb collision force at the time of a rear collision, and reduce the influence of the forward transmission of the collision force on members mounted on the underbody, such as a battery pack.

One end of the side member 31b of the reinforcing beam 31 is connected to the second beam 131, and collision force or traction force at the time of rear collision or traction can be further dispersed to the rear side frame 13.

The embodiment of the present invention also provides a vehicle, which includes the vehicle body rear structure 10 of any one of the above structures.

The terms "first, second, third and the like" and the like herein are used solely to distinguish one from another and do not denote a particular order or importance to the subject matter, but rather are used to distinguish one from another, and where permissible, such that embodiments described herein may be practiced in other sequences than illustrated or otherwise described herein.

The term "comprising" as used herein should not be interpreted as being limited to the elements listed thereafter, which do not exclude other elements. It should therefore be interpreted as specifying the presence of the stated features, integers or components as referred to, but does not preclude the presence or addition of one or more other features, integers or components, and groups thereof. Thus, the expression "a device comprising the components a and B" should not be limited to a device consisting of only the components a and B.

Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment, but may. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, as would be apparent to one of ordinary skill in the art from this disclosure.

In addition, the foregoing is only the preferred embodiment of the present application and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present application has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the spirit and scope of the present invention.

Claims (11)

1. A vehicle body rear structure comprising:

the accommodating part is arranged at the rear part of the vehicle body, and the bottom of the accommodating part is provided with a reinforcing beam extending along the vehicle width direction;

the pair of rear longitudinal beams are respectively arranged on two sides of the accommodating part and extend along the vehicle length direction;

the rear auxiliary frame is connected with the rear longitudinal beam through a first connecting piece;

wherein the first connector is connected to the stiffening beam.

2. The vehicle body rear structure according to claim 1,

the rear longitudinal beam comprises a first beam and a second beam which are connected with each other along the vehicle length direction, the second beam is arranged behind the first beam, and the first connecting piece is connected with the connecting position of the first beam and the second beam.

3. The vehicle body rear structure according to claim 1,

and two ends of the reinforcing beam are respectively connected with the rear longitudinal beams.

4. The vehicle body rear structure according to claim 1,

and a second connecting piece is further arranged, one end of the second connecting piece is connected to the reinforcing beam, and the other end of the second connecting piece is connected to the rear auxiliary frame.

5. The vehicle body rear structure according to claim 4,

the rear auxiliary frame is provided with a rear longitudinal beam fixing part which is connected with the rear longitudinal beam through the first connecting piece and is connected with the other end of the second connecting piece,

the rear longitudinal beam fixing part is located between the first connecting piece and the second connecting piece.

6. The vehicle body rear structure according to claim 2,

the reinforcement beam includes a cross member and a side member connected to each other, the cross member being provided at a bottom portion of the accommodating portion and extending in a vehicle width direction, one end of the side member being connected to the cross member, and the other end of the side member being connected to the second beam.

7. The vehicle body rear structure according to claim 6,

still be equipped with the second connecting piece, the one end of second connecting piece connect in transverse component with the junction of side part, the other end connect in back sub vehicle frame.

8. The vehicle body rear structure according to claim 1,

the first connecting piece is fixed on the reinforcing beam through a first fixing part,

the first fixing portion includes a first fixing side portion extending in the vehicle length direction and connected to a surface of the reinforcing beam extending in the vehicle length direction, and a second fixing side portion extending in the vehicle width direction and connected to a surface of the reinforcing beam extending in the vehicle width direction.

9. The vehicle body rear structure according to claim 2,

and a plurality of grooves extending along the vehicle height direction are formed on the side wall of the second beam.

10. The vehicle body rear structure according to any one of claims 1 to 9,

and the pulling hook is connected with the reinforcing beam.

11. A vehicle characterized by comprising the vehicle body rear structure of any one of claims 1 to 10.

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