CN219838615U - Lower vehicle body structure and vehicle - Google Patents

Abstract

The present utility model relates to a lower body structure and a vehicle, the lower body structure including a rocker assembly and an exhaust pipe assembly; the threshold assembly is provided with an accommodating space extending along the front-rear direction of the vehicle; the exhaust pipe assembly is connected with the threshold assembly, wherein at least part of the exhaust pipe assembly is arranged in the accommodating space and extends along the front-rear direction of the vehicle. At least part of the exhaust pipe assembly is integrated in the threshold assembly, so that the Y-direction space occupied by the exhaust pipe assembly and the threshold assembly when being installed on the vehicle body is reduced, the installation space is reserved for Y-direction expansion of the battery pack while the side collision performance of the vehicle is ensured to be met, the battery pack with larger Y-direction size can be installed, the battery capacity is increased, and the cruising mileage of the vehicle is improved; and the exhaust pipe assembly threshold assembly is integrated, so that the strength of the lower vehicle body structure is improved, the lower vehicle body structure can absorb more collision energy during collision, the side collision performance of the vehicle is improved, and safer guarantee is provided for passengers.

Description

Lower vehicle body structure and vehicle

Technical Field

The utility model belongs to the technical field of vehicles, and particularly relates to a lower vehicle body structure and a vehicle.

Background

With attention paid to energy and environmental problems, vehicles adopting new energy as driving force have become a new trend.

Because install the battery package in the new energy vehicle, to the hybrid vehicle type, blast pipe and battery package are all installed on the automobile body floor, and the arrangement of blast pipe can influence the installation of battery package and restrict the volume of battery package to influence whole car duration.

Disclosure of Invention

The utility model provides a lower vehicle body structure and a vehicle, which can increase the installation space of a battery pack while ensuring that the side collision performance of the vehicle is met.

The embodiment of the utility model provides a lower vehicle body structure, which comprises a threshold assembly and an exhaust pipe assembly;

the threshold assembly is provided with an accommodating space extending along the front-rear direction of the vehicle;

the exhaust pipe assembly is connected with the threshold assembly, wherein at least part of the exhaust pipe assembly is arranged in the accommodating space and extends along the front-rear direction of the vehicle.

Optionally, the threshold assembly comprises a threshold reinforcement beam, a threshold inner plate and a threshold outer plate; the threshold inner plate is connected with the threshold outer plate to form the accommodating space; the threshold reinforcement beam is arranged in the accommodating space, and is provided with an installation cavity extending along the front-rear direction of the vehicle; the exhaust pipe assembly is arranged in the mounting cavity in a penetrating mode.

Optionally, the exhaust pipe assembly comprises an exhaust pipe and a cooling pipe; the cooling pipe is sleeved outside the exhaust pipe; and a cooling cavity is formed between the cooling pipe and the exhaust pipe.

Optionally, the cooling cavity is a vacuum cavity or the cooling cavity is used for placing a coolant.

Optionally, the cooling tube comprises a first tube body and a second tube body; the cooling cavity comprises a first cavity and a second cavity;

the first pipe body is sleeved outside the exhaust pipe and matched with the exhaust pipe to form the first cavity;

the second pipe body is sleeved outside the first pipe body and matched with the first pipe body to form the second cavity.

Optionally, the threshold reinforcement beam comprises a reinforcement beam outer shell, a reinforcement beam inner shell and reinforcement ribs;

the reinforcement beam outer shell is sleeved outside the reinforcement beam inner shell; the installation cavity is arranged in the reinforcing beam inner shell;

the reinforcing ribs are used for connecting the reinforcing beam outer shell and the reinforcing beam inner shell so as to form at least two reinforcing cavities extending along the front-rear direction of the vehicle.

Optionally, the rocker inner panel includes an inner panel side wall and an inner panel bottom wall, and the rocker reinforcement beam is connected with the inner panel side wall and the inner panel bottom wall, respectively.

Optionally, in the front-rear direction of the vehicle, both ends of the threshold assembly are provided with threshold sealing plates, and the projection of the threshold sealing plates in the front-rear direction of the vehicle is at least partially overlapped with the projection of the threshold reinforcing beam in the front-rear direction of the vehicle;

the lower vehicle body structure further comprises a fixed support lug arranged on the exhaust pipe assembly, and the fixed support lug is fixedly connected with the threshold sealing plate.

Optionally, in the vehicle height direction, the bottom of the inner rocker panel is connected with the bottom of the outer rocker panel to form a lower rocker seam allowance;

in the vehicle width direction, the rocker lower spigot is located on a side of the exhaust pipe assembly axis away from the rocker inner panel.

Optionally, the lower body structure further comprises a barrier layer disposed between the exhaust pipe assembly and the mounting cavity inner wall.

The utility model also provides a vehicle, which comprises a battery pack and the lower vehicle body structure according to any one of the technical schemes; the battery pack is connected to the threshold assembly such that the threshold assembly forms a battery pack mounting beam.

Optionally, the threshold assembly comprises a threshold reinforcement beam, a threshold inner plate and a threshold outer plate; the threshold inner plate is connected with the threshold outer plate to form the accommodating space; the threshold reinforcement beam is arranged in the accommodating space;

the battery pack is connected with the threshold reinforcement beam such that the threshold assembly is formed as a battery pack mounting beam.

In the lower vehicle body structure and the vehicle provided by the embodiment of the utility model, at least part of the exhaust pipe assembly is integrated in the threshold assembly, so that the Y-direction space occupied by the exhaust pipe assembly and the threshold assembly when being arranged on the vehicle body is greatly reduced, the side collision performance of the vehicle is ensured to be met, and meanwhile, the installation space is reserved for the Y-direction expansion of the battery pack, so that the battery pack with larger Y-direction size can be installed, the battery capacity is increased, and the cruising mileage of the vehicle is improved; and the exhaust pipe assembly threshold assembly is integrated, so that the strength of the lower vehicle body structure is improved, the lower vehicle body structure can absorb more collision energy during collision, the side collision performance of the vehicle is improved, and safer guarantee is provided for passengers.

Drawings

FIG. 1 is a schematic view showing a part of a lower body structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view showing a part of the structure of a lower body structure according to an embodiment of the present utility model;

fig. 3 is a schematic view of a part of a vehicle according to an embodiment of the present utility model.

Reference numerals in the specification are as follows:

1. a threshold reinforcement beam; 11. a stiffening beam housing; 12. a stiffening beam inner shell; 13. reinforcing ribs; 14. a reinforcing cavity; 15. a first connection hole; 16. a second connection hole; 17. a third connection hole; 18. a fourth connection hole; 2. a rocker inner panel; 21. an inner panel side wall; 22. an inner panel bottom wall; 3. a threshold outer plate; 4. an exhaust pipe; 5. a cooling tube; 51. a first tube body; 52. a second tube body; 6. a cooling chamber; 61. a first cavity; 62. a second cavity; 7. a nutplate; 8. a threshold lower spigot; 9. fixing the support lugs; 10. a fixing bolt; 20. a column A inner plate; 30. a front longitudinal beam rear section; 40. a rocker inner plate rear connecting plate; 50. a threshold closing plate; 60. a barrier layer.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, 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 thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

All directions mentioned in the utility model are based on the normal use state of the vehicle, the Y direction is the left-right direction of the vehicle, and the Z direction is the up-down direction of the vehicle.

As shown in fig. 1, the lower vehicle body structure provided by the embodiment of the utility model comprises a threshold assembly and an exhaust pipe assembly; the threshold assembly is provided with an accommodating space extending along the front-rear direction of the vehicle; the exhaust pipe assembly is connected with the threshold assembly, wherein at least part of the exhaust pipe assembly is arranged in the accommodating space and extends along the front-rear direction of the vehicle.

In the lower vehicle body structure provided by the embodiment of the utility model, the threshold assembly is provided with the accommodating space extending along the front-rear direction of the vehicle, and at least part of the exhaust pipe assembly extends along the front-rear direction of the vehicle and is arranged in the accommodating space; by the design, at least part of the exhaust pipe assembly is integrated in the threshold assembly, so that the Y-direction space occupied by the exhaust pipe assembly and the threshold assembly when being installed on the vehicle body is greatly reduced, the installation space is reserved for Y-direction expansion of the battery pack while the side collision performance of the vehicle is ensured to be met, the battery pack with larger Y-direction size can be installed, the battery capacity is increased, and the cruising mileage of the vehicle is improved; and the exhaust pipe assembly threshold assembly is integrated, so that the strength of the lower vehicle body structure is improved, the lower vehicle body structure can absorb more collision energy during collision, the side collision performance of the vehicle is improved, and safer guarantee is provided for passengers.

In one embodiment, as shown in fig. 1, the rocker assembly includes a rocker reinforcement beam 1, a rocker inner panel 2, and a rocker outer panel 3; the inner threshold plate 2 is connected with the outer threshold plate 3 to form an accommodating space; the threshold reinforcement beam 1 is provided in the accommodation space, and the threshold reinforcement beam 1 is provided with a mounting cavity extending in the vehicle front-rear direction; the exhaust pipe assembly is arranged in the mounting cavity in a penetrating way.

In this example, the rocker inner panel 2 is connected to the rocker outer panel 3 to form an accommodation space for accommodating the rocker reinforcement beam 1; the design is that the inner sill plate 2 and the outer sill plate 3 are matched to provide an accommodating space for the sill reinforcement beam 1, so that the sill reinforcement beam 1 is protected; the threshold stiffening beam 1 plays a role in strengthening the threshold assembly, so that the overall strength of the threshold assembly is improved; simultaneously, wear to establish the blast pipe assembly at threshold stiffening beam 1's installation intracavity, can protect blast pipe 4 better to blast pipe 4 plays further enhancement effect to the threshold assembly, makes vehicle body structure can absorb more collision energy when the collision down, promotes vehicle lateral part collision performance, provides safer guarantee for the passenger.

In one embodiment, as shown in fig. 1, the exhaust pipe assembly comprises an exhaust pipe 4 and a cooling pipe 5, wherein the cooling pipe 5 is sleeved outside the exhaust pipe 4; a cooling chamber 6 is formed between the cooling pipe 5 and the exhaust pipe 4.

In this example, the cooling pipe 5 is sleeved outside the exhaust pipe 4, so that a cooling cavity 6 is formed between the cooling pipe 5 and the exhaust pipe 4, thereby being capable of playing a role of heat insulation and temperature reduction between the exhaust pipe 4 and the threshold assembly through the cooling cavity 6, reducing heat transferred from the exhaust pipe 4 to the threshold assembly, and keeping the temperature of the outer surface of the threshold assembly within a proper range.

In the present embodiment, the cooling chamber 6 is a vacuum chamber or the cooling chamber 6 is used for placing a coolant.

As an example, the cooling chamber 6 is a vacuum chamber. That is, a vacuum cavity is arranged between the exhaust pipe 4 and the inner wall of the installation cavity, so that a vacuum heat insulation layer is formed between the exhaust pipe 4 and the threshold assembly, the heat transferred from the exhaust pipe 4 to the threshold assembly is greatly reduced, and the temperature of the outer surface of the threshold assembly is reduced.

As an example, the cooling chamber 6 is used for placing a coolant. In this example, the coolant may be any one of a fixed coolant, a liquid coolant, and a gaseous coolant. As a preferred embodiment, the coolant is a liquid coolant or a gaseous coolant; that is, the cooling chamber 6 is used for circulating a liquid coolant (such as water) or a gaseous coolant (such as air); by means of the design, the exhaust pipe 4 can be cooled through flowing liquid coolant or gaseous coolant, cooling efficiency is improved, the exhaust pipe 4 is guaranteed to be cooled in a short time, and accordingly heat transferred to a threshold assembly by the exhaust pipe 4 is reduced. As another preferred embodiment, the coolant is a solid coolant, i.e. the cooling chamber 6 is filled with a solid coolant; the exhaust pipe 4 is cooled by the solid coolant, so that heat transferred to the threshold assembly by the exhaust pipe 4 is reduced, and the temperature of the outer surface of the threshold assembly is reduced.

In the present embodiment, as shown in fig. 1, the cooling pipe 5 includes a first pipe body 51 and a second pipe body 52; the cooling chamber 6 comprises a first chamber 61 and a second chamber 62; the first pipe body 51 is sleeved outside the exhaust pipe 4 and is matched with the exhaust pipe 4 to form a first cavity 61; the second pipe body 52 is sleeved outside the first pipe body 51 and is matched with the first pipe body 51 to form a second cavity 62.

In this example, the first pipe body 51 and the second pipe body 52 are sequentially sleeved outside the exhaust pipe 4, a first cavity 61 is formed between the first pipe body 51 and the exhaust pipe 4, a second cavity 62 is formed between the second pipe body 52 and the first pipe body 51, and cooling fluid is respectively infused into the first cavity 61 and the second cavity 62, so that a double-layer cooling layer is formed on the exhaust pipe 4, the cooling efficiency is further improved, the heat transferred to the threshold assembly by the exhaust pipe 4 is greatly reduced, and the temperature of the outer surface of the threshold assembly is guaranteed to be less than 40 ℃.

The first cavity 61 may be a vacuum cavity or may be used for placing any coolant. The second chamber 62 may be a vacuum chamber or may be used to hold any coolant.

Preferably, the thickness of the first cavity 61 in the radial direction of the exhaust pipe 4 is not less than 10mm; the thickness of the second cavity 62 in the radial direction of the exhaust pipe 4 is not less than 10mm; by means of the design, the cooling layers are guaranteed to have enough thickness, so that the cooling effect of the cooling mechanism on the exhaust pipe 4 is guaranteed, and the exhaust pipe 4 can be cooled rapidly and effectively.

In the present embodiment, the first pipe body 51, the second pipe body 52, and the exhaust pipe 4 are coaxially disposed; that is, the exhaust pipe 4 is located at the center of the first pipe body 51, and the first pipe body 51 is located at the center of the second pipe body 52; by the design, the thicknesses of the first cavity 61 in the radial directions of the exhaust pipe 4 are consistent, the thicknesses of the second cavity 62 in the radial directions of the exhaust pipe 4 are consistent, uniform heat dissipation of the exhaust pipe 4 is facilitated, and the exhaust pipe 4 can be cooled rapidly.

In one embodiment, as shown in fig. 1, the rocker reinforcement 1 includes a reinforcement outer shell 11, a reinforcement inner shell 12, and a reinforcement bar 13; the reinforcement beam outer shell 11 is sleeved outside the reinforcement beam inner shell 12; a mounting cavity is arranged in the reinforcing beam inner shell 12; the reinforcing ribs 13 are used to connect the reinforcement beam outer shell 11 and the reinforcement beam inner shell 12 to form at least two reinforcement cavities 14 extending in the vehicle front-rear direction.

In this example, the reinforcement beam outer shell 11 is sleeved outside the reinforcement beam inner shell 12, and the reinforcement ribs 13 are connected between the reinforcement beam outer shell 11 and the reinforcement beam inner shell 12 to divide the space between the reinforcement beam outer shell 11 and the reinforcement beam inner shell 12 into at least two reinforcement cavities 14; by the design, sufficient space is provided for deformation and energy absorption of the threshold reinforcement beam 1 during collision; and the threshold stiffening beam 1 is designed into a double-layer structure, and the exhaust pipe assembly is arranged in the installation cavity of the stiffening beam inner shell 12 in a penetrating way, so that a certain heat insulation effect is achieved in the reinforcing space, the heat transferred from the exhaust pipe assembly to the stiffening beam outer shell 11 is reduced, the temperature of the outer surface of the threshold assembly is further reduced, and the comfort of passengers is ensured.

In one embodiment, as shown in FIG. 1, the stiffening cavities 14 are arranged in three layers along the Z-direction, with at least one stiffening cavity 14 being provided in each layer. In this example, the reinforcing ribs 13 are provided in plurality, the reinforcing ribs 13 divide the reinforcing space into at least three reinforcing cavities 14, each reinforcing cavity 14 is provided in three layers along the Z direction, and at least one reinforcing cavity 14 is provided in each layer; the design is favorable to better heat dissipation, reduces the heat that the exhaust pipe assembly transmits to the outer surface of the threshold assembly to reduce the temperature of the outer surface of the threshold assembly, guarantee the travelling comfort of passenger.

Preferably, the uppermost layer is provided with three reinforcing cavities 14, the middle layer is provided with three reinforcing cavities 14, and the lowermost layer is provided with one reinforcing cavity 14; by the design, the heat transferred from the exhaust pipe assembly to the outer surface of the threshold assembly can be reduced as much as possible, so that the temperature transferred from the exhaust pipe assembly to the outer surface of the threshold assembly is the minimum temperature as much as possible, and the comfort of passengers is ensured.

In one embodiment, as shown in fig. 1, the rocker inner panel 2 includes an inner panel side wall 21 and an inner panel bottom wall 22, and the rocker reinforcement beam 1 is connected to the inner panel side wall 21 and the inner panel bottom wall 22, respectively. In this example, inner panel lateral wall 21 and inner panel diapire 22 are connected with threshold stiffening beam 1 respectively, have increased threshold stiffening beam 1 and threshold inner panel 2's connection area, have made things convenient for the equipment location of threshold stiffening beam 1 and threshold inner panel 2, have improved the steadiness that threshold stiffening beam 1 is connected with threshold inner panel 2.

In the present embodiment, as shown in fig. 1, the portion of the inner side wall of the reinforcement beam housing 11 opposite to the uppermost reinforcing cavity 14 is attached to the inner panel side wall 21 of the rocker inner panel 2; the portion of the inner side wall of the reinforcement beam housing 11 opposite to the lowermost reinforcement cavity 14 is disposed at a distance from the inner panel side wall 21 of the rocker inner panel 2; by means of the design, the stability of connection of the threshold reinforcement beam 1 and the threshold inner plate 2 is guaranteed, deformation energy-absorbing space is reserved between the bottom of the threshold inner plate 2 and the threshold reinforcement beam 1, more collision energy can be absorbed by the threshold assembly during collision, and the collision energy transferred to the battery pack is reduced.

In the present embodiment, as shown in fig. 1, a rocker reinforcement beam 1 is provided at a distance from a rocker outer panel 3; by means of the design, a deformation energy-absorbing space is reserved between the threshold reinforcement beam 1 and the threshold outer plate 3, so that the threshold assembly can absorb more collision energy when collision occurs, injury to passengers is reduced, and safety of the passengers is guaranteed.

In one embodiment, as shown in fig. 2, in the vehicle front-rear direction, both ends of the rocker assembly are provided with rocker seal plates 50, and the projection of the rocker seal plates 50 in the vehicle front-rear direction at least partially overlaps with the projection of the rocker reinforcement beam 1 in the vehicle front-rear direction; the lower body structure further includes a fixing lug 9 provided on the exhaust pipe assembly, and the fixing lug 9 is fixedly connected with the threshold seal plate 50.

In this example, through fixed journal stirrup 9 and threshold shrouding 50 fixed connection at the both ends of threshold assembly, realize blast pipe assembly and threshold assembly's fixed connection, made things convenient for the equipment of blast pipe assembly and threshold assembly, guaranteed the steadiness that blast pipe assembly and threshold assembly are connected.

In this embodiment, the exhaust pipe assembly is in clearance fit with the mounting cavity; the fixed lugs 9 are detachably connected with the threshold reinforcement beam 1; by the design, the assembly and the disassembly of the exhaust pipe assembly and the threshold assembly are facilitated, and the maintenance operation is facilitated.

Preferably, as shown in fig. 2, the fixing lugs 9 and the threshold closing plate 50 are fixedly connected by means of fixing bolts 10.

Preferably, as shown in fig. 2, each threshold sealing plate 50 is correspondingly provided with two fixing lugs 9, and the two fixing lugs 9 are symmetrically arranged along the radial direction of the exhaust pipe 4; the design is favorable to improving the steadiness that the blast pipe assembly is connected with the threshold assembly, prevents that the blast pipe assembly from rocking and taking place abnormal sound.

The fixing lugs 9 and the exhaust pipe 4 can be integrally formed, or can be respectively processed, assembled and fixed.

In one embodiment, as shown in fig. 1, the rocker inner panel 2 is provided at a position close to the battery pack as an inclined outward slope; by the design, a trapezoid cavity is formed between the threshold inner plate 2 and the battery pack, the energy absorption space between the battery pack and the threshold inner plate 2 is increased, collision energy transferred to the battery pack by the threshold assembly during collision is less, the invasion amount of the battery pack to the passenger compartment is reduced, and the safety of passengers is ensured.

In one embodiment, as shown in fig. 1, in the vehicle height direction, the bottom of the rocker inner panel 2 is connected with the bottom of the rocker outer panel 3 to form a rocker lower spigot 8; the rocker lower spigot 8 is located on a side of the exhaust pipe assembly axis away from the rocker inner panel 2 in the vehicle width direction. In this example, the under-threshold spigot 8 is located on the side of the exhaust pipe assembly axis away from the inner threshold plate 2; that is, the under-threshold spigot 8 is disposed as far as possible, so that more space can be reserved for enlargement of the battery pack or arrangement of the vehicle piping; and make reservation deformation energy-absorbing space between the bottom of threshold inner panel 2 and the battery package, be favorable to taking place the threshold assembly and can absorb more collision energy when colliding, reduce the collision energy that transmits to on the battery package.

In one embodiment, the lower body structure further includes a barrier layer 60, the barrier layer 60 being disposed between the exhaust pipe assembly and the inner wall of the mounting cavity. In this example, the barrier layer 60 is provided between the exhaust pipe assembly and the inner wall of the installation cavity, so that the exhaust pipe assembly is stably installed in the installation cavity, and abnormal sound between the exhaust pipe assembly and the threshold assembly due to vibration can be prevented.

The utility model also provides a vehicle, a battery pack and the lower vehicle body structure of any embodiment; the battery pack is connected to the threshold assembly such that the threshold assembly forms a battery pack mounting beam.

In the vehicle provided by the embodiment of the utility model, the battery pack is connected with the threshold assembly, so that the threshold assembly is formed into a battery pack mounting beam; that is, the Y-direction mounting point of the battery pack is arranged on the threshold assembly, so that the Y-direction mounting space on the vehicle body is effectively increased, more space is reserved for the Y-direction increase of the battery pack, the Y-direction size of the battery pack is increased, the volume of the battery pack is increased, and the endurance mileage of the vehicle is improved.

In one embodiment, the battery pack is connected to the sill reinforcement beam 1 of the sill assembly such that the sill assembly forms a battery pack mounting beam.

In this example, as shown in fig. 1, a nut plate 7 is fixed on the bottom wall of the reinforcing cavity 14 at the lowest layer in the threshold reinforcing beam 1, and the nut plate 7 is used for connecting the battery pack, that is, the nut plate 7 is a Y-direction mounting point of the battery pack on the threshold assembly. That is, the Y-direction mounting point of the battery pack is provided on the threshold reinforcement beam 1, so that the threshold assembly is formed into the battery pack mounting beam, thus effectively increasing the Y-direction mounting space of the battery pack, facilitating the mounting of the battery pack with a larger Y-direction size, and increasing the volume of the battery pack.

In one embodiment, the vehicle further includes an a-pillar inner panel 20, a front rail rear section 30, and a rocker inner panel rear attachment panel 40; the rocker assemblies are fixedly connected with the a-pillar inner panel 20, the front side rail rear section 30 and the rocker inner panel rear connecting panel 40, respectively.

As an example, as shown in fig. 3, a first projection welding nut is welded on the a-pillar inner panel 20, a first connecting hole 15 matched with the first projection welding nut is provided on the threshold reinforcement beam 1, and a first bolt passes through the first connecting hole 15 and is fixedly connected with the first projection welding nut, so as to realize connection of the a-pillar inner panel 20 and the threshold reinforcement beam 1.

As an example, as shown in fig. 3, a second projection welding nut is welded on the front-side member rear section 30, a second connecting hole 16 matched with the second projection welding nut is provided on the threshold reinforcement beam 1, and a second bolt passes through the second connecting hole 16 to be fixedly connected with the second projection welding nut, so as to realize connection of the front-side member rear section 30 and the threshold reinforcement beam 1.

As an example, as shown in fig. 3, a third projection welding nut is welded on the threshold inner plate 2, a third connecting hole 17 matched with the third projection welding nut is arranged on the threshold reinforcement beam 1, and a third bolt passes through the third connecting hole 17 to be fixedly connected with the third projection welding nut, so that the threshold inner plate 2 is connected with the threshold reinforcement beam 1. Preferably, the third projection nut is provided with two.

As an example, as shown in fig. 3, a fourth projection welding nut is welded on the rocker inner panel rear connecting plate 40, a fourth connecting hole 18 matched with the fourth projection welding nut is provided on the rocker reinforcement beam 1, and a fourth bolt passes through the fourth connecting hole 18 to be fixedly connected with the fourth projection welding nut, so as to realize the connection of the rocker inner panel rear connecting plate 40 and the rocker reinforcement beam 1.

As an example, the lower body structure is disposed near the outside of the vehicle body. That is, on the premise of satisfying the vehicle width, the lower body structure is arranged as close as possible; by the design, on the premise of meeting collision safety, the compression of the Y-direction space of the lower vehicle body structure is minimized, so that the Y-direction space is reserved for the increase of the battery pack, the battery capacity is increased, and the cruising mileage of the vehicle is improved.

As an example, the rocker assembly at least partially overlaps the seat rail in the Y-direction. The design increases the overlapping amount of the threshold assembly and the seat beam in the Y direction as much as possible, improves the transmission of side collision force, and therefore in the collision process, the threshold stiffening beam 1 deforms and absorbs energy firstly, the seat beam deforms after deforming, and the rest of collision energy is transmitted to the battery pack, so that the battery pack is protected.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (12)

1. A lower body structure comprising a rocker assembly and an exhaust pipe assembly;

the threshold assembly is provided with an accommodating space extending along the front-rear direction of the vehicle;

the exhaust pipe assembly is connected with the threshold assembly, wherein at least part of the exhaust pipe assembly is arranged in the accommodating space and extends along the front-rear direction of the vehicle.

2. The lower body structure of claim 1, wherein the rocker assembly includes a rocker reinforcement beam, a rocker inner panel, and a rocker outer panel; the threshold inner plate is connected with the threshold outer plate to form the accommodating space; the threshold reinforcement beam is arranged in the accommodating space, and is provided with an installation cavity extending along the front-rear direction of the vehicle; the exhaust pipe assembly is arranged in the mounting cavity in a penetrating mode.

3. The lower body structure according to any one of claims 1 to 2, wherein the exhaust pipe assembly includes an exhaust pipe and a cooling pipe; the cooling pipe is sleeved outside the exhaust pipe; and a cooling cavity is formed between the cooling pipe and the exhaust pipe.

4. A lower vehicle body structure according to claim 3, wherein the cooling chamber is a vacuum chamber or the cooling chamber is for placing a coolant.

5. The lower body structure according to claim 3, wherein the cooling pipe includes a first pipe body and a second pipe body; the cooling cavity comprises a first cavity and a second cavity;

the first pipe body is sleeved outside the exhaust pipe and matched with the exhaust pipe to form the first cavity;

the second pipe body is sleeved outside the first pipe body and matched with the first pipe body to form the second cavity.

6. The lower body structure of claim 2, wherein the rocker reinforcement includes a reinforcement outer shell, a reinforcement inner shell, and a reinforcement rib;

the reinforcement beam outer shell is sleeved outside the reinforcement beam inner shell; the installation cavity is arranged in the reinforcing beam inner shell;

the reinforcing ribs are used for connecting the reinforcing beam outer shell and the reinforcing beam inner shell so as to form at least two reinforcing cavities extending along the front-rear direction of the vehicle.

7. The lower body structure according to claim 2, wherein the rocker inner panel includes an inner panel side wall and an inner panel bottom wall, and the rocker reinforcement beam is connected to the inner panel side wall and the inner panel bottom wall, respectively.

8. The lower body structure according to claim 2, wherein in the vehicle front-rear direction, both ends of the rocker assembly are provided with rocker seal plates, a projection of which in the vehicle front-rear direction at least partially overlaps a projection of the rocker reinforcement beam in the vehicle front-rear direction;

the lower vehicle body structure further comprises a fixed support lug arranged on the exhaust pipe assembly, and the fixed support lug is fixedly connected with the threshold sealing plate.

9. The lower body structure according to claim 2, wherein a bottom portion of the rocker inner panel is joined to a bottom portion of the rocker outer panel in a vehicle height direction to form a rocker lower seam allowance;

in the vehicle width direction, the rocker lower spigot is located on a side of the exhaust pipe assembly axis away from the rocker inner panel.

10. The lower body structure of claim 2, further comprising a barrier layer disposed between the exhaust pipe assembly and the mounting cavity inner wall.

11. A vehicle comprising a battery pack and the lower body structure of any one of claims 1-10; the battery pack is connected to the threshold assembly such that the threshold assembly forms a battery pack mounting beam.

12. The vehicle of claim 11, wherein the rocker assembly comprises a rocker reinforcement beam, a rocker inner panel, and a rocker outer panel; the threshold inner plate is connected with the threshold outer plate to form the accommodating space; the threshold reinforcement beam is arranged in the accommodating space;

the battery pack is connected with the threshold reinforcement beam such that the threshold assembly is formed as a battery pack mounting beam.