Underbody arrangement structure and vehicle

Abstract

[0009] An underbody arrangement structure (100) includes a vehicle body longitudinal beam (1), an exhaust pipe mounting bracket (2), and a first exhaust pipe (3), the exhaust pipe mounting bracket (2) is connected to the vehicle body longitudinal beam (1), a first cavity is formed between the exhaust pipe mounting bracket (2) and the vehicle body longitudinal beam (1), the first exhaust pipe (3) is accommodated in the first cavity, and a projection of the first exhaust pipe (3) on a horizontal plane at least partially overlaps a projection of the vehicle body longitudinal beam (1) on the horizontal plane. The vehicle body arrangement structure can protect the first exhaust pipe and prevent it from being hit to extend the service life of the first exhaust pipe, and can optimize the arrangement space in the width direction of the vehicle body to increase the arrangement utilization rate of the underbody. [0010] A vehicle including the underbody arrangement structure is also disclosed.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to Chinese Patent Application No. 202211438911.3, entitled "LOWER VEHICLE BODY ARRANGEMENT STRUCTURE AND VEHICLE," filed by BYD Co., Ltd. on November 16, 2022.

[0002] The present disclosure relates to the technical field of vehicles, and more particularly to underbody arrangement structures and vehicles. [Background technology]

[0003] Hybrid electric vehicles, with their energy-saving and low-pollution features, have attracted much attention from the automobile industry and become the focus of automobile research and development.

[0004] A hybrid electric vehicle is characterized by a long continuous operating time and good engine dynamics, and may have the advantages of no pollution and low noise of the motor. Therefore, a hybrid electric vehicle includes at least an engine system and an electric drive system, both of which are arranged in the underbody. Therefore, how to improve the space utilization of the underbody is a current technical problem that needs to be solved as soon as possible. Summary of the Invention

[0005] The present disclosure is intended to solve at least to some extent one of the technical problems in the prior art.

[0006] Accordingly, the present disclosure provides an underbody arrangement.

[0007] The lower body arrangement structure according to the present disclosure includes a body longitudinal beam, an exhaust pipe mounting bracket connected to the body longitudinal beam and forming a first cavity between the exhaust pipe mounting bracket and the body longitudinal beam, and a first exhaust pipe housed in the first cavity such that a projection of the first exhaust pipe on a horizontal plane at least partially overlaps a projection of the body longitudinal beam on the horizontal plane.

[0008] In the present disclosure, the first exhaust pipe is disposed in a first cavity formed between the exhaust pipe mounting bracket and the body longitudinal beam so that the first exhaust pipe can be protected by the body longitudinal beam and the exhaust pipe mounting bracket to prevent the first exhaust pipe from being hit and to extend the service life of the first exhaust pipe.

[0009] In addition, the projection of the first exhaust pipe on the horizontal plane at least partially overlaps with the projection of the longitudinal beam of the vehicle body on the horizontal plane when the change in the lower body is minimal. Therefore, the first exhaust pipe can be arranged in the width direction of the vehicle body and moved outward as far as possible so that the arrangement space in the width direction of the vehicle body can be maximized to further facilitate the arrangement of another system for the lower body and to further improve the arrangement utilization of the lower body.

[0010] The present disclosure further provides a vehicle including an underbody alignment structure.

[0011] Additional aspects and advantages of the disclosure will be set forth in part in the description that follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic structural diagram of a lower body arrangement structure according to an embodiment of the present disclosure. [Figure 2] 1 is a schematic structural cross-sectional view of a lower body arrangement structure according to an embodiment of the present disclosure. [Figure 3]1 is a schematic diagram of an overall exploded structure of an underbody arrangement according to another embodiment of the present disclosure; FIG. [Figure 4] FIG. 1 is a schematic structural diagram of a vehicle body longitudinal beam according to an embodiment of the present disclosure. [Figure 5] 1 is a schematic structural diagram of an exhaust pipe mounting bracket according to an embodiment of the present disclosure. [Figure 6] 1 is a schematic structural diagram of an impact absorbing device according to an embodiment of the present disclosure; [Figure 7] 1 is a schematic structural diagram of a first exhaust pipe according to an embodiment of the present disclosure. [Figure 8] FIG. 2 is a cross-sectional view of a first exhaust pipe along line AA according to one embodiment of the present disclosure. [Figure 9] FIG. 10 is a schematic structural diagram of a third exhaust pipe according to an embodiment of the present disclosure. [Figure 10] FIG. 2 is a schematic structural diagram of a second exhaust pipe according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0013]

[0023] Embodiments of the present disclosure are described in detail below, and example embodiments are illustrated in the accompanying drawings, in which the same or similar elements, or elements having the same or similar functions, are represented by the same or similar reference numerals throughout the description. The embodiments described below with reference to the accompanying drawings are exemplary and intended to illustrate the present disclosure and should not be construed as limitations on the present disclosure.

[0014] An underbody arrangement 100 according to one embodiment of the present disclosure is described below with reference to FIGS.

[0015] Referring to FIGS. 1 and 2, the underbody arrangement structure 100 includes a body longitudinal beam 1 , an exhaust pipe mounting bracket 2 , and a first exhaust pipe 3 .

[0016] The exhaust pipe mounting bracket 2 is connected to the vehicle body longitudinal beam 1, and a first cavity is formed between the exhaust pipe mounting bracket and the vehicle body longitudinal beam. A first exhaust pipe 3 is housed in the first cavity, and the projection of the first exhaust pipe on a horizontal plane at least partially overlaps the projection of the vehicle body longitudinal beam on the horizontal plane.

[0017] In this embodiment, the first exhaust pipe is disposed in a first cavity formed between the exhaust pipe mounting bracket and the vehicle body longitudinal beam so that the first exhaust pipe can be protected by the vehicle body longitudinal beam and the exhaust pipe mounting bracket to prevent the first exhaust pipe from being hit and extend its service life. In addition, the projection of the first exhaust pipe on a horizontal plane at least partially overlaps with the projection of the vehicle body longitudinal beam on a horizontal plane when the amount of change in the lower body is minimal. Therefore, the first exhaust pipe can be disposed in the vehicle body width direction and moved outward as far as possible so that the arrangement space in the vehicle body width direction can be maximized to further facilitate the arrangement of another system for the lower body and to further improve the arrangement utilization of the lower body.

[0018] In another embodiment based on this embodiment, referring to FIG. 3, the longitudinal beam of the vehicle body is a sill beam.

[0019] In this embodiment, the longitudinal beam of the vehicle body is a sill beam. The first exhaust pipe is arranged in the width direction of the vehicle body and can be moved further outward so as to maximize the space available in the width direction of the vehicle body and improve the space utilization of the lower body.

[0020] In another embodiment based on this embodiment, referring to FIG. 3, the exhaust pipe mounting bracket is a battery pack fixing bracket.

[0021] In this embodiment, one side of the exhaust pipe mounting bracket is used to secure the battery pack, and the other side of the exhaust pipe mounting bracket is used to mount the first exhaust pipe, thereby reusing the bracket, which optimizes the layout space in the width direction of the vehicle body, improves the layout space utilization of the underbody, and reduces the demand for brackets, thereby reducing the overall cost of the vehicle.

[0022] In another embodiment based on this embodiment, referring to FIG. 4, a first recessed portion 10 is provided on the inside of the vehicle longitudinal beam 1, and a second recessed portion is formed in the exhaust pipe mounting bracket 2, and the first recessed portion 10 is provided opposite the second recessed portion to form a first cavity.

[0023] In this embodiment, the vehicle body longitudinal beam includes a first longitudinal beam region 11 and a second longitudinal beam region 12. The first longitudinal beam region 11 and the second longitudinal beam region 12 are positioned at a predetermined angle to form the first recessed portion 10. The predetermined angle is typically about 90°.

[0024] The first longitudinal beam region 11 and the second longitudinal beam region 12 form a first recessed portion 10, which is configured to accommodate the first exhaust pipe so that the first exhaust pipe can be protected to prevent it from being hit and to extend its useful life. In addition, the first exhaust pipe is therefore positioned outward (outward in the width direction of the vehicle body) inside the sill beam so that the arrangement space in the width direction of the vehicle body can be maximized to further facilitate the arrangement of another system for the underbody and to further improve the arrangement utilization of the underbody.

[0025] The first longitudinal beam section 11 is connected to a cross beam 13 to perform a lateral collision prevention function.

[0026] 5, in another embodiment based on this embodiment, the exhaust pipe mounting bracket 2 is a battery pack fixing bracket, and the battery pack fixing bracket includes a first connection section 20 and a second connection section 21. The first connection section 20 and the second connection section 21 are arranged at an included angle to form a second recessed portion. The second connection section is connected to a vehicle body longitudinal beam, and the first connection section is configured as a partial structure of the battery pack protective frame.

[0027] In this embodiment, the first connection section and the second connection section are connected at a predetermined angle and, together with a first recessed portion 10 provided in the longitudinal beam of the vehicle body, form a first cavity that fills the first exhaust pipe.

[0028] To increase the size of the first cavity, the predetermined angle generally ranges from 80° to 110°.

[0029] In another embodiment based on this embodiment, the second connection section 21 extends outward from the bottom of the first connection section 20 .

[0030] In another embodiment based on this embodiment, referring to FIG. 3, the underbody arrangement structure 100 further includes an impact absorbing device 4 .

[0031] The shock absorbing device 4 is disposed within the first cavity, and the first exhaust pipe is disposed on the shock absorbing device 4. The shock absorbing device 4 is configured to reduce vibrations caused by engine exhaust flowing through the first exhaust pipe.

[0032] In this embodiment, the impact absorbing device 4 is positioned to reduce vibrations caused by the engine exhaust flowing through the first exhaust pipe, thereby improving the NVH performance of the entire vehicle.

[0033] In another embodiment based on this embodiment, referring to FIG. 6, the shock absorbing device 4 includes a mounting portion 40 and a shock absorbing portion 41 .

[0034] The mounting portion 40 is connected to the exhaust pipe mounting bracket, and the shock absorbing portion 41 is disposed on the mounting portion 40. The shock absorbing portion 41 is configured to accommodate the first exhaust pipe and to reduce vibrations caused by engine exhaust flowing through the first exhaust pipe.

[0035] In this embodiment, the mounting portion 40 is fixedly connected to the exhaust pipe mounting bracket, thereby improving the stability of the impact absorbing device 4. Additionally, the impact absorbing portion 41 in this solution may be configured to accommodate the first exhaust pipe to improve the stability of the first exhaust pipe, and may also be configured to dampen vibrations caused by engine exhaust flowing through the first exhaust pipe to improve the NVH performance of the overall vehicle.

[0036] 5 and 6, in another embodiment based on this embodiment, the exhaust pipe mounting bracket 2 is provided with a mounting hole 22, and the mounting portion 40 includes a first mounting post 400. The first mounting post 400 and the mounting hole 22 are configured to connect the shock absorbing device 4 to the exhaust pipe mounting bracket.

[0037] In this embodiment, the first mounting strut 400 is inserted into the mounting hole 22 to connect the shock absorbing device 4 to the exhaust pipe mounting bracket, thereby improving the connection stability of the shock absorbing device 4 and the exhaust pipe mounting bracket. It should be noted that other connection methods in the prior art also fall within the protection scope of this embodiment.

[0038] In another embodiment based on this embodiment, the shock absorbing portion 41 is made of a shock absorbing material, and a U-shaped groove 410 is provided in the shock absorbing portion 41, and the first exhaust pipe is housed in the U-shaped groove 410.

[0039] The shock absorbing portion 41 of this embodiment includes a U-shaped groove 410, and the shape of the U-shaped groove 410 fits the shape of the first exhaust pipe, thereby improving the stability of the first exhaust pipe. In addition, the shock absorbing portion 41 is made of a rubber material, and the shock absorbing portion 41 is connected to the mounting portion 40 through vulcanization to become an integral part, thereby improving the overall strength of the shock absorbing device 4.

[0040] 3 and 6, in another embodiment based on this embodiment, the first exhaust pipe is provided with a first restricting member 30, and the shock absorbing part 41 is provided with a second restricting member 411 that matches the first restricting member 30. The first restricting member 30 and the second restricting member 411 cooperate to prevent the first exhaust pipe from rotating and moving back and forth.

[0041] In this embodiment, the first restricting member 30 of the first exhaust pipe and the second restricting member 411 of the shock absorbing section 41 cooperate to prevent the first exhaust pipe from rotating and moving back and forth, thereby preventing the exhaust pipe connection from falling off due to engine exhaust vibrations and further improving the connection stability of the exhaust pipe.

[0042] 3 and 6, in another embodiment based on this embodiment, the first restricting member 30 includes a protrusion, and the second restricting member 411 includes a restricting hole. The shape of the protrusion matches the shape of the restricting hole.

[0043] In this embodiment, the protrusion and the restricting hole are adapted to prevent the first exhaust pipe from rotating and moving back and forth, and the structure is simple and easy to implement, reducing the cost, the assembly is easy, and the assembly difficulty is reduced. It should be noted that other structures for preventing rotation and moving back and forth in the prior art are also included in the protection scope of this embodiment.

[0044] In another embodiment based on this embodiment, referring to FIG. 5, the exhaust pipe mounting bracket is provided with a groove 23, the mounting portion 40 is disposed in the groove 23, and a portion of the shock absorbing portion 41 is embedded in the groove.

[0045] In this embodiment, the shock absorbing part 41 is embedded in the groove. Therefore, the thickness of the shock absorbing part 41 can be optimized within a limited space. A larger thickness of the shock absorbing part 41 indicates a better shock absorbing effect of the shock absorbing part 41, thereby improving the NVH performance of the entire vehicle.

[0046] In another embodiment based on this embodiment, the first exhaust pipe includes a first pipe body 31 , a heat insulating layer 32 , and a second pipe body 33 .

[0047] An exhaust channel suitable for flowing engine exhaust is formed inside the first tube 31. A second tube 33 surrounds a portion of the circumference of the first tube 31, and a thermal insulation layer 32 is disposed between the first tube 31 and the second tube 33.

[0048] In this embodiment, in order to prevent the vehicle body longitudinal beam from overheating or the exhaust pipe mounting bracket from overheating, excessive heat of the exhaust pipe is prevented from being transferred to the outside by the arrangement of the heat insulating layer 32. In addition, in this embodiment, the second pipe body 33 is arranged to increase the strength of the entire exhaust pipe.

[0049] In another embodiment based on this embodiment, referring to FIG. 3, the underbody arrangement structure further includes a third exhaust pipe 5.

[0050] The third exhaust pipe 5 is connected to the first end of the first exhaust pipe, and the third exhaust pipe 5 is configured to reduce vibrations caused by the engine exhaust.

[0051] In this embodiment, the shock absorption is first performed by the third exhaust pipe 5 and then by the first exhaust pipe, so that the shock absorption effect is improved through double shock absorption.

[0052] In another embodiment based on this embodiment, referring to FIG. 9, the third exhaust pipe 5 includes a first connecting portion 50 , a bellows 51 , and a second connecting portion 52 .

[0053] The first interface part 50 is configured to be connected to an exhaust pipe of an engine. The bellows 51 is configured to reduce vibrations caused by the engine exhaust. The second interface part 52 is configured to be connected to the first exhaust pipe.

[0054] In this embodiment, the vibration of the engine exhaust and the vibration of the power transmission mechanism are implemented through the bellows 51, which simplifies the structure and is easy to implement, thereby reducing the cost.

[0055] In another embodiment based on this embodiment, the underbody arrangement further comprises a rear subframe longitudinal beam 6 and a second exhaust pipe 7 .

[0056] A second cavity is provided in the rear subframe longitudinal beam 6. A first end of a second exhaust pipe 7 is connected to the second end of the first exhaust pipe, and the second exhaust pipe 7 is housed in the second cavity.

[0057] In this embodiment, the second exhaust pipe 7 is housed in the second cavity, which improves the utilization of the installation space of the underbody and reduces the assembly difficulty of the rear subframe longitudinal beam 6 and the second exhaust pipe 7.

[0058] In another embodiment based on this embodiment, referring to FIG. 10, the underbody arrangement further includes a thermal insulation device 8 .

[0059] The thermal insulation device is disposed between the second exhaust pipe 7 and the rear subframe longitudinal beam 6, and the thermal insulation device is configured to confine the second exhaust pipe 7 and to reduce heat transferred from the second exhaust pipe 7 to the rear subframe longitudinal beam 6.

[0060] In this embodiment, in order to protect the rear subframe longitudinal beam 6 from overheating, the arrangement of the heat insulating device prevents excessive heat of the exhaust pipe from being transferred to the outside.

[0061] In another embodiment based on this embodiment, the thermal insulation device is made of a thermal insulating material and is provided with a U-shaped groove, and the second exhaust pipe 7 is housed in the U-shaped groove.

[0062] The heat insulating device of this embodiment can insulate the rear subframe longitudinal beam 6 to prevent it from overheating, and can also stabilize the second exhaust pipe 7 through the U-shaped groove.

[0063] It should be noted that a bellows is further arranged at the tail end of the second exhaust pipe 7 to achieve a triple shock absorption effect together with the bellows of the third exhaust pipe 5 and the shock absorbing part 41 of the first exhaust pipe, thereby enhancing the shock absorption effect.

[0064] In another embodiment based on this embodiment, the underbody arrangement further includes a sound-deadening device 9 , which is connected to a second end of the second exhaust pipe 7 .

[0065] In this embodiment, the arrangement of the silencer device reduces exhaust pulsation and reduces exhaust noise as much as possible, thereby improving the NVH performance of the entire vehicle.

[0066] According to another aspect of the present disclosure, a vehicle is provided that includes the underbody arrangement structure described in the above embodiment. Therefore, the vehicle has all the technical features and advantages of the above-mentioned underbody arrangement structure. Details will not be described herein. Generally, the vehicle has at least the advantages of high battery energy density, good exhaust pipe heat dissipation effect, and high safety performance of the entire vehicle.

[0067] In describing the present disclosure, it should be understood that orientational or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "above," "below," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on orientational or positional relationships shown in the accompanying drawings, and are used solely for ease of explanation and simplicity of description of the present disclosure, rather than indicating or implying that the described devices or elements require a particular orientation or be configured and operated in a particular orientation. Accordingly, such terms should not be construed as limiting the present disclosure.

[0068] Additionally, the terms "first" and "second" are used solely for descriptive purposes and should not be construed as indicating or implying the relative importance or quantity of the indicated technical features. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this disclosure, "a plurality of" means two or more unless expressly and specifically limited otherwise.

[0069] In this disclosure, unless expressly specified or defined otherwise, terms such as "attach," "connect," "connection," and "secure" should be understood broadly. For example, a connection may be a fixed connection, a removable connection, or an integral connection, a mechanical connection or an electrical connection, a direct connection, an indirect connection through an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art will understand the specific meanings of the foregoing terms in this disclosure depending on the particular situation.

[0070] Unless expressly specified or defined otherwise in this disclosure, a first feature being located "above" or "below" a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature via an intermediate medium. Additionally, a first feature being "above" a second feature may indicate that the first feature is on top of or diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below" a second feature may indicate that the first feature is below or diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0071] In the description herein, a description associated with terms such as "one embodiment," "some variations," "example," "particular example," or "some examples" means that the particular feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, general descriptions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, unless inconsistent, those skilled in the art can combine and combine various embodiments or examples with the features of the various embodiments or examples described herein.

[0072] Although embodiments of the present disclosure have been illustrated and described above, it can be understood that the foregoing embodiments are illustrative and should not be construed as limitations on the present disclosure. Those skilled in the art can make changes, modifications, substitutions, and variations to the foregoing embodiments within the scope of the present disclosure.

Claims

1. a longitudinal beam of the vehicle body; an exhaust pipe mounting bracket connected to the body longitudinal beam, forming a first cavity between the exhaust pipe mounting bracket and the body longitudinal beam; a first exhaust pipe housed in the first cavity, wherein a projection of the first exhaust pipe on a horizontal plane at least partially overlaps a projection of the body longitudinal beam on the horizontal plane; and A lower body arrangement structure comprising:

2. 2. The vehicle underbody arrangement structure according to claim 1, wherein the exhaust pipe mounting bracket is a battery pack fixing bracket.

3. 3. The underbody arrangement structure of claim 1, wherein a first recessed portion is provided on the inside of the body longitudinal beam and a second recessed portion is formed in the exhaust pipe mounting bracket, the first recessed portion being positioned opposite the second recessed portion to form the first cavity.

4. 2. The underbody arrangement structure according to claim 1, wherein the exhaust pipe mounting bracket is a battery pack fixing bracket, the battery pack fixing bracket includes a first connection section and a second connection section, the first connection section and the second connection section are arranged at an included angle to form a second recessed portion, the second connection section is connected to the vehicle body longitudinal beam, and the first connection section is configured as a partial structure of a battery pack protective frame.

5. The underbody arrangement of claim 4 , wherein the second connection section extends outwardly from a bottom of the first connection section.

6. an impact absorbing device disposed within the first cavity, the first exhaust pipe being disposed on the impact absorbing device; The lower body arrangement structure according to claim 1 , further comprising:

7. The shock absorbing device is a mounting portion connected to the exhaust pipe mounting bracket; and a shock absorbing portion disposed on the mounting portion; The lower body arrangement of claim 6, comprising:

8. 8. The vehicle lower body arrangement structure according to claim 7, wherein the impact absorbing portion is provided with a U-shaped groove, and the first exhaust pipe is housed in the U-shaped groove.

9. 9. The lower body arrangement structure according to claim 7 or 8, wherein a first restricting member is provided on the first exhaust pipe, and a second restricting member is provided on the impact absorbing portion, and the first restricting member and the second restricting member cooperate to restrict the first exhaust pipe.

10. 10. The underbody arrangement structure according to claim 9, wherein one of the first restricting member and the second restricting member is a protrusion and the other is a restricting hole, and the protrusion is fitted into the restricting hole.

11. 8. The underbody arrangement structure according to claim 7, wherein the exhaust pipe mounting bracket is provided with a groove, the mounting portion is disposed in the groove, and a portion of the impact absorbing portion is embedded in the groove.

12. The first exhaust pipe, a first tube having an exhaust channel formed therein suitable for flowing engine exhaust; a second pipe that covers a portion of the circumference of the first pipe and has an insulating layer disposed between the second pipe and the first pipe; The lower body arrangement structure according to any one of claims 1 to 11, comprising:

13. a rear subframe longitudinal beam having a second cavity disposed therein; a second exhaust pipe, a first end of the second exhaust pipe connected to the first exhaust pipe and housed in the second cavity; The lower body arrangement structure according to any one of claims 1 to 12, further comprising:

14. a thermal insulation device disposed between the second exhaust pipe and the rear subframe longitudinal beam and configured to confine the second exhaust pipe and reduce heat transferred from the second exhaust pipe to the rear subframe longitudinal beam. The underbody arrangement of claim 13 further comprising:

15. 6. An underbody arrangement according to any one of claims 1 to 5, wherein the longitudinal body beam is a sill beam.

16. A vehicle comprising the underbody arrangement structure according to any one of claims 1 to 15.

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