A rear suspension trailing arm assembly and a vehicle

Abstract

This utility model provides a rear suspension trailing arm assembly and a vehicle, relating to the field of vehicle components. The rear suspension trailing arm assembly includes a trailing arm mounting bracket and a rear suspension trailing arm. The trailing arm mounting bracket includes a base plate and multiple side plates. The base plate is used to connect to the bottom wall of the rear longitudinal beam. The multiple side plates are arranged around the base plate to form a frame structure. One end of the frame structure is connected to the base plate, and the rear suspension trailing arm extends into the frame structure from the other end and is rotatably connected to the frame structure. Compared with the U-shaped trailing arm mounting bracket used in related technologies, the trailing arm mounting bracket in this solution uses a frame structure connected to the base plate. The multiple side plates of the frame structure form a wrap-around support, which has better rigidity and durability. Moreover, it forms a closed force transmission path, which can more effectively transmit multi-directional vibration forces on the rear suspension trailing arm during vehicle operation, reduce vibration noise, and improve the ride comfort and safety of passengers.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts, and more specifically, to a rear suspension trailing arm assembly and a vehicle. Background Technology

[0002] The rear suspension trailing arm is a crucial component of the rear suspension, typically mounted on the vehicle's longitudinal beams via mounting brackets. The rigidity of these brackets significantly impacts the connection stability between the rear suspension and the vehicle's longitudinal beams, thereby affecting ride comfort and safety. Since the mounting brackets are usually U-shaped supports welded to the vehicle's longitudinal beams, with the rear suspension trailing arm installed within the U-shaped groove of the bracket, the U-shaped brackets have relatively poor rigidity, load-bearing capacity, and durability. Furthermore, during vehicle operation, the rear suspension trailing arms are subjected to multi-directional vibrations, making the U-shaped brackets highly susceptible to cracking and failure, resulting in poor ride comfort and safety for passengers. Utility Model Content

[0003] This utility model aims to solve the technical problems of low rigidity and poor durability of the mounting bracket for the rear suspension trailing arm in related technologies.

[0004] On one hand, this utility model provides a rear suspension trailing arm assembly, including a trailing arm mounting bracket and a rear suspension trailing arm. The trailing arm mounting bracket includes a base plate and multiple side plates. The base plate is used to connect with the bottom wall of the rear longitudinal beam. The multiple side plates are arranged around the base plate to form a frame structure. One end of the frame structure is connected to the base plate. The rear suspension trailing arm extends from the other end of the frame structure and is rotatably connected to the frame structure.

[0005] Optionally, the rear suspension trailing arm assembly further includes a first rear floor longitudinal beam reinforcement plate. The plurality of side plates include a first side plate and a second side plate spaced apart along the left-right direction of the vehicle. The rear suspension trailing arm is rotatably connected to the first side plate and the second side plate. The first side plate is located on the side of the second side plate facing the interior of the vehicle. The first rear floor longitudinal beam reinforcement plate is located on the side of the first side plate facing the exterior of the frame structure. The first rear floor longitudinal beam reinforcement plate is connected to the side wall of the first side plate and the rear longitudinal beam facing the interior of the vehicle, respectively.

[0006] Optionally, the rear suspension trailing arm assembly further includes a second rear floor longitudinal beam reinforcement plate, which is located on the side of the second side plate facing outward from the frame structure, and is connected to the bottom wall of the second side plate and the rear longitudinal beam, respectively.

[0007] Optionally, the rear suspension trailing arm assembly further includes a trailing arm mounting bracket, and the plurality of side plates further include a third side plate. The third side plate is connected between one end of the first side plate and the second side plate. The trailing arm mounting bracket is located on the side of the third side plate facing the outside of the frame structure. The trailing arm mounting bracket is connected to the third side plate, the first rear floor longitudinal beam reinforcement plate, the second rear floor longitudinal beam reinforcement plate, the rear longitudinal beam, the rear floor lower crossbeam, and the sill beam, respectively.

[0008] Optionally, the first rear floor longitudinal beam reinforcing plate, the longitudinal arm mounting bracket, and the rear longitudinal beam enclose a first chamber.

[0009] And / or, the second rear floor longitudinal beam reinforcing plate, the longitudinal arm mounting bracket and the rear longitudinal beam enclose a second chamber;

[0010] And / or, the longitudinal arm mounting support plate, the longitudinal arm mounting bracket, and the rear longitudinal beam enclose a third chamber.

[0011] Optionally, the rear suspension trailing arm assembly further includes a rear longitudinal beam reinforcement plate, wherein the rear longitudinal beam is partially recessed towards the underside of the vehicle to form a cavity, the rear longitudinal beam reinforcement plate is placed in the cavity and corresponds to the position of the trailing arm mounting bracket, and the rear longitudinal beam reinforcement plate is connected to the bottom wall and the side wall of the cavity.

[0012] Optionally, the rear suspension trailing arm assembly also includes a sill reinforcement plate for mounting on the side of the sill beam facing the vehicle interior, the sill reinforcement plate being connected to the rear longitudinal beam, the rear floor under-beam, and the sill beam.

[0013] Optionally, the ends of the first side plate and the second side plate away from the bottom plate are bent toward opposite sides to form a first flange;

[0014] And / or, the ends of the first and second rear floor longitudinal beam reinforcing plates away from the rear longitudinal beam are bent toward opposite sides to form a second flange.

[0015] Optionally, the multiple side panels are formed by bending the same sheet of material multiple times, and the two ends of the sheet of material are welded together to form the frame structure, and the frame structure is welded to the bottom plate;

[0016] And / or, at least one of the side plates is provided with a positioning through hole;

[0017] And / or, the base plate is provided with an exhaust and leakage hole.

[0018] On the other hand, this utility model also proposes a vehicle, including a rear longitudinal beam and the aforementioned rear suspension trailing arm assembly, wherein the trailing arm mounting bracket of the rear suspension trailing arm assembly is mounted on the bottom wall of the rear longitudinal beam.

[0019] The rear suspension trailing arm assembly and vehicle of this utility model have at least the following advantages compared to related technologies:

[0020] The trailing arm mounting bracket has multiple side plates arranged around it to form a frame structure. For example, there are four side plates, which are connected end to end to form a square or trapezoidal frame. The two ends of the frame structure are open. One of the open ends of the frame structure is connected to the bottom plate to form a box-shaped trailing arm mounting bracket. The trailing arm mounting bracket is located below the rear longitudinal beam, and the bottom plate of the trailing arm mounting bracket is attached to the bottom wall of the rear longitudinal beam. One end of the rear suspension trailing arm extends into the opening of the box structure and is rotatably connected to the corresponding side plate to realize the installation of the rear suspension trailing arm on the rear longitudinal beam. Compared with the U-shaped trailing arm mounting bracket used in related technologies, the trailing arm mounting bracket in this solution is constructed by connecting the frame structure and the bottom plate at one end. The multiple side plates of the frame structure form a wrap-around support, which has better rigidity and durability. Moreover, it forms a closed force transmission path, which can more effectively transmit multi-directional vibration forces on the rear suspension trailing arm during vehicle operation, reduce vibration noise, and improve the ride comfort and safety of the passengers. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the installation structure of the rear suspension trailing arm assembly on the rear longitudinal beam according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the installation structure of the rear suspension trailing arm assembly on the rear longitudinal beam from another perspective, according to an embodiment of the present invention.

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a partially exploded structural diagram of the rear suspension trailing arm assembly according to an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the longitudinal arm mounting bracket according to an embodiment of the present utility model;

[0026] Figure 6 This is a cross-sectional view of the rear suspension trailing arm assembly according to an embodiment of the present utility model, wherein the solid arrow indicates the direction of force transmission;

[0027] Figure 7This is a cross-sectional view of the rear suspension trailing arm assembly from another perspective of this utility model embodiment, wherein the solid arrow indicates the direction of force transmission, and the double dashed lines indicate the fourth side plate;

[0028] Figure 8 This is a force decomposition diagram of the rear suspension trailing arm assembly from another perspective according to an embodiment of the present invention, wherein the solid arrow indicates the direction of force transmission.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Trailing arm mounting bracket; 101. Base plate; 102. Side plate; 1021. First side plate; 1022. Second side plate; 1023. Third side plate; 1024. Fourth side plate; 103. First flange; 104. Positioning through hole; 105. Vent and leak hole; 2. First rear floor longitudinal beam reinforcement plate; 3. Second rear floor longitudinal beam reinforcement plate; 4. Trailing arm mounting support plate; 5. Longitudinal beam reinforcement plate; 6. Sill reinforcement plate; 7. Second flange; 8. Rear suspension trailing arm; 9. Rear longitudinal beam; 901. Cavity; 10. Rear floor lower crossbeam; 11. Sill beam; 12. Bushing; 100. First chamber; 200. Second chamber; 300. Third chamber. Detailed Implementation

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fitting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In addition, it should be noted that in the description of this utility model, the terms and nouns in each embodiment, such as "upper," "lower," "front," and "rear," which indicate the location, are only used to simplify the description of the positional relationship based on the accompanying drawings. They do not mean that the components and devices referred to must be operated in accordance with the specific location and limited operation, method, and structure in the specification. Such directional terms do not constitute a limitation on this utility model.

[0034] This paper establishes a coordinate system XYZ, where the X-axis represents the vehicle's front-to-back direction, with the positive X-axis pointing forward and the negative X-axis pointing backward; the Y-axis represents the vehicle's left-to-right direction, with the positive Y-axis pointing to the left and the negative Y-axis pointing to the right; and the Z-axis represents the vehicle's vertical direction, with the positive Z-axis pointing upward and the negative Z-axis pointing downward. It should be noted that the aforementioned X, Y, and Z-axis representations are merely for ease of description and simplification, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] like Figures 1-4 As shown, a rear suspension trailing arm assembly according to an embodiment of the present invention includes a trailing arm mounting bracket 1 and a rear suspension trailing arm 8. The trailing arm mounting bracket 1 includes a base plate 101 and a plurality of side plates 102. The base plate 101 is used to connect with the bottom wall of the rear longitudinal beam 9. The plurality of side plates 102 are arranged around the base plate 101 to form a frame structure. One end of the frame structure is connected to the base plate 101. The rear suspension trailing arm 8 extends from the other end of the frame structure and is rotatably connected to the frame structure.

[0036] It should be noted that there are two rear longitudinal beams 9 symmetrically arranged along the left-right direction of the vehicle, that is, the direction shown by the Y-axis. The rear longitudinal beams 9 extend roughly along the front-rear direction of the vehicle, that is, the direction shown by the X-axis. The rear suspension can have two rear suspension trailing arms 8, one on the left and one on the right. The rear suspension trailing arms 8 are arranged one-to-one with the rear longitudinal beams 9. The two rear suspension trailing arms 8 are respectively mounted on the corresponding rear longitudinal beams 9 through the corresponding trailing arm mounting brackets 1.

[0037] A bushing 12 is provided between the corresponding side plates 102 of the trailing arm mounting bracket 1. A bolt passes through the bushing 12 along the axial direction to fix the bushing 12 to the side plate 102. One end of the rear suspension trailing arm 8 is provided with a sleeve and is sleeved on the bushing 12. The rear suspension trailing arm 8 can rotate relative to the bushing 12 through the sleeve.

[0038] Specifically, the longitudinal arm mounting bracket 1 is located below the rear longitudinal beam 9. The shape of the base plate 101 of the longitudinal arm mounting bracket 1 matches the shape of the bottom wall of the rear longitudinal beam 9 at the corresponding position. For example, it can be a bent plate, so that the base plate 101 can be fitted and fixed to the bottom wall of the rear longitudinal beam 9. Multiple side plates 102 are generally arranged vertically. In order to ensure that the multiple side plates 102 are arranged around the base plate 101 and can form a frame structure, at least three side plates 102 are provided. One end of the frame structure, that is, the upper end of some side plates 102, is connected to the base plate 101 to form a box-shaped structure with an open bottom together with the base plate 101.

[0039] In this embodiment, multiple side plates 102 of the trailing arm mounting bracket 1 are arranged around each other to form a frame structure. For example, there are four side plates 102, which are connected end to end to form a square frame or a trapezoidal frame. The two ends of the frame structure are open. One of the open ends of the frame structure is connected to the bottom plate 101 to form a box-shaped trailing arm mounting bracket 1. The trailing arm mounting bracket 1 is located below the rear longitudinal beam 9, and the bottom plate 101 of the trailing arm mounting bracket 1 is attached to the bottom wall of the rear longitudinal beam 9. One end of the rear suspension trailing arm 8 extends into the opening of the box-shaped structure and connects with the corresponding... The side plate 102 is rotatably connected to realize the installation of the rear suspension trailing arm 8 on the rear longitudinal beam 9. Compared with the U-shaped trailing arm mounting bracket 1 used in related technologies, the trailing arm mounting bracket 1 in this embodiment is formed by connecting a frame structure and a base plate 101 set at one end. The multiple side plates 102 of the frame structure are used to form a wrap-around support, which has better rigidity and durability. Moreover, it forms a closed force transmission path, which can more effectively transmit the multi-directional vibration force on the rear suspension trailing arm 8 during vehicle operation, reduce vibration noise, and improve the ride comfort and safety of the occupants.

[0040] like Figures 3-7 As shown, optionally, the rear suspension trailing arm assembly further includes a first rear floor longitudinal beam reinforcement plate 2. The plurality of side plates 102 include a first side plate 1021 and a second side plate 1022 spaced apart along the left and right direction of the vehicle. The rear suspension trailing arm 8 is rotatably connected to the first side plate 1021 and the second side plate 1022. The first side plate 1021 is located on the side of the second side plate 1022 facing the interior of the vehicle. The first rear floor longitudinal beam reinforcement plate 2 is located on the side of the first side plate 1021 facing the exterior of the frame structure. The first rear floor longitudinal beam reinforcement plate 2 is connected to the side wall facing the interior of the vehicle of the first side plate 1021 and the rear longitudinal beam 9, respectively.

[0041] It should be noted that the first side plate 1021 and the second side plate 1022 can be arranged relatively opposite to each other in the left-right direction of the vehicle. Since the first side plate 1021 and the second side plate 1022 are arranged relatively vertically, and the upper ends of the first side plate 1021 and the second side plate 1022 are in contact with the bottom wall of the rear longitudinal beam 9 through the bottom plate 101, the rear suspension trailing arm 8 is rotatably connected between the first side plate 1021 and the second side plate 1022, so that the force transmitted from the rear suspension trailing arm 8 to the first side plate 1021 in the Z direction can be transmitted through the first side plate 1021 and the bottom plate 101 to the side wall of the rear longitudinal beam 9 facing the inside of the vehicle, that is, the inner side wall. The force transmitted from the rear suspension trailing arm 8 to the second side plate 1022 in the Z direction can be transmitted through the second side plate 1022 and the bottom plate 101 to the side wall of the rear longitudinal beam 9 facing the outside of the vehicle, that is, the outer side wall. Moreover, the outer wall of the rear longitudinal beam 9 is usually fitted and connected to the sill beam 11, so that the force transmitted to the outer wall of the rear longitudinal beam 9 can be further transmitted to the sill beam 11.

[0042] The first rear floor longitudinal beam reinforcing plate 2 is located on the side of the first side plate 1021 facing the outside of the frame structure, that is, on the side of the first side plate 1021 away from the second side plate 1022. The thickness direction of the first rear floor longitudinal beam reinforcing plate 2 is the left-right direction of the vehicle, that is, the direction shown by the Y axis. The first rear floor longitudinal beam reinforcing plate 2 can be a bent structure. The lower part of the first rear floor longitudinal beam reinforcing plate 2 is welded to the first side plate 1021, and the upper part of the first rear floor longitudinal beam reinforcing plate 2 is bent towards the inside of the vehicle to be welded to the inner wall of the rear longitudinal beam 9.

[0043] In this embodiment, by providing a first rear floor longitudinal beam reinforcing plate 2 on the side of the first side plate 1021 of the trailing arm mounting bracket 1 facing the outside of the frame structure, and connecting the lower part of the first rear floor longitudinal beam reinforcing plate 2 to the first side plate 1021 and the upper part to the side wall of the rear longitudinal beam 9 facing the vehicle interior, the force transmitted from the rear suspension trailing arm 8 to the first side plate 1021 of the trailing arm mounting bracket 1 can be transmitted to the inner side wall of the rear longitudinal beam 9 via the bottom plate 101 in the Z direction, and also via the first rear floor longitudinal beam reinforcing plate 2. Figure 6 As shown, adding a Z-axis force transmission path makes the force more evenly distributed and the structure more stable.

[0044] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, optionally, the rear suspension trailing arm assembly also includes a second rear floor longitudinal beam reinforcement plate 3, which is located on the side of the second side plate 1022 facing the outside of the frame structure, and is connected to the bottom wall of the second side plate 1022 and the rear longitudinal beam 9 respectively.

[0045] Specifically, the second rear floor longitudinal beam reinforcing plate 3 is located on the side of the second side plate 1022 facing the outside of the frame structure, that is, on the side of the second side plate 1022 away from the first side plate 1021. The thickness direction of the second rear floor longitudinal beam reinforcing plate 3 is the left-right direction of the vehicle, that is, the direction shown by the Y axis. The second rear floor longitudinal beam reinforcing plate 3 can be a bent structure. The lower part of the second rear floor longitudinal beam reinforcing plate 3 is welded to the second side plate 1022, and the upper part of the second rear floor longitudinal beam reinforcing plate 3 is bent towards the outside of the vehicle to be welded to the bottom wall of the rear longitudinal beam 9.

[0046] In this embodiment, by providing a second rear floor longitudinal beam reinforcing plate 3 on the side of the second side plate 1022 of the trailing arm mounting bracket 1 facing the outside of the frame structure, and connecting the lower part of the second rear floor longitudinal beam reinforcing plate 3 to the second side plate 1022 and the upper part to the bottom wall of the rear longitudinal beam 9, the force transmitted from the rear suspension trailing arm 8 to the first side plate 1021 of the trailing arm mounting bracket 1, in addition to being transmitted to the outer wall of the rear longitudinal beam 9 via the bottom plate 101 in the Z direction, can also be transmitted to the outer wall of the rear longitudinal beam 9 via the second rear floor longitudinal beam reinforcing plate 3. Figure 6 As shown, adding a Z-axis force transmission path makes the force more evenly distributed and the structure more stable.

[0047] like Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, optionally, the rear suspension trailing arm assembly further includes a trailing arm mounting bracket 4, and the plurality of side plates 102 further include a third side plate 1023. The third side plate 1023 is connected between one end of the first side plate 1021 and the second side plate 1022. The trailing arm mounting bracket 4 is located on the side of the third side plate 1023 facing the outside of the frame structure. The trailing arm mounting bracket 4 is connected to the third side plate 1023, the first rear floor longitudinal beam reinforcing plate 2, the second rear floor longitudinal beam reinforcing plate 3, the rear longitudinal beam 9, the rear floor lower crossbeam 10, and the sill beam 11, respectively.

[0048] Specifically, the plurality of side panels 102 may further include a fourth side panel 1024. The third side panel 1023 and the fourth side panel 1024 are spaced apart along the vehicle's front-rear direction, i.e., the direction shown by the X-axis. The third side panel 1023 is located in front of the fourth side panel 1024. The third side panel 1023 is connected between one end of the first side panel 1021 and the second side panel 1022. The fourth side panel 1024 is connected between the other end of the first side panel 1021 and the second side panel 1022. The first side panel 1021, the second side panel 1022, the third side panel 1023 and the fourth side panel 1024 can be enclosed to form a square frame.

[0049] One end of the rear suspension trailing arm 8 is inserted obliquely into the frame structure from below the fourth side plate 1024. The setting height of the fourth side plate 1024 can be less than the setting height of the third side plate 1023, so as to avoid the fourth side plate 1024 restricting the rotation of the rear suspension trailing arm 8, and so that the rear suspension trailing arm 8 has a larger angle rotation range in the vertical direction.

[0050] The trailing arm mounting bracket 4 extends approximately along the vehicle's left-right direction, i.e., the Y-axis, and is located on the side of the third side plate 1023 away from the frame structure. The lower part of the trailing arm mounting bracket 4 is connected to the first rear floor longitudinal beam reinforcement plate 2, the third side plate 1023, and the second rear floor longitudinal beam reinforcement plate 3. The upper part of the trailing arm mounting bracket 4 is bent away from the trailing arm mounting bracket 1 to connect with the rear longitudinal beam 9, the rear floor lower crossbeam 10, and the sill beam 11. This allows the force transmitted from the rear suspension trailing arm 8 to the first side plate 1021 of the trailing arm mounting bracket 1 to be directly transmitted to the rear longitudinal beam 9, or transmitted to the sill beam 11 via the third side plate 1023 and the trailing arm mounting bracket 4, or transmitted to the sill beam 11 via the first rear floor longitudinal beam reinforcement plate 2 and the trailing arm mounting bracket 4. Figure 7 As shown; the force transmitted from the rear suspension trailing arm 8 to the second side plate 1022 of the trailing arm mounting bracket 1 can be directly transmitted to the rear longitudinal beam 9, or transmitted to the sill beam 11 via the third side plate 1023 and trailing arm mounting support plate 4, or transmitted to the sill beam 11 via the second rear floor longitudinal beam reinforcement plate 3 and trailing arm mounting support plate 4, or transmitted to the rear floor lower crossbeam 10 via the second rear floor longitudinal beam reinforcement plate 3 and trailing arm mounting support plate 4, forming multiple Y-axis force transmission paths, making the force more evenly distributed and the structural stability better, such as Figure 7 As shown (only a portion of the Y-axis force transmission path is shown).

[0051] like Figure 6 and Figure 8 As shown, optionally, the first rear floor longitudinal beam reinforcing plate 2, the longitudinal arm mounting bracket 1 and the rear longitudinal beam 9 enclose a first chamber 100.

[0052] And / or, the second rear floor longitudinal beam reinforcing plate 3, the longitudinal arm mounting bracket 1 and the rear longitudinal beam 9 enclose a second chamber 200;

[0053] And / or, the longitudinal arm mounting support plate 4, the longitudinal arm mounting bracket 1, and the rear longitudinal beam 9 enclose a third chamber 300.

[0054] In this embodiment, the first rear floor longitudinal beam reinforcing plate 2, the longitudinal arm mounting bracket 1, and the rear longitudinal beam 9 enclose a first chamber 100, which increases the cross-sectional size at the connection point of the three components, improves the resistance to deformation, and allows external forces to be better absorbed when transmitted to this point, thus maintaining its shape stability, improving the overall structural rigidity, and reducing vibration and noise during driving. The first chamber 100 can be in the shape of a triangle, quadrilateral, or similar shapes.

[0055] The functions of the second chamber 200 and the third chamber 300 are similar to those of the first chamber 100, and will not be repeated here.

[0056] like Figure 1 and Figure 6As shown, optionally, the rear suspension trailing arm assembly further includes a rear longitudinal beam reinforcement plate 5, wherein the rear longitudinal beam 9 is partially recessed toward the underside of the vehicle to form a cavity 901, the rear longitudinal beam reinforcement plate 5 is placed in the cavity 901 and corresponds to the position of the trailing arm mounting bracket 1, and the rear longitudinal beam reinforcement plate 5 is connected to the bottom wall and the side wall of the cavity 901.

[0057] Specifically, the cavity 901, the rear longitudinal beam reinforcing plate 5, and the rear longitudinal beam 9 extend in the same direction. The rear longitudinal beam reinforcing plate 5 can be a U-shaped structure that matches the shape of the cavity 901. The rear longitudinal beam reinforcing plate 5 is placed inside the cavity 901 and is welded to the bottom wall and side wall of the cavity 901. The position of the rear longitudinal beam reinforcing plate 5 corresponds to the longitudinal arm mounting bracket 1. That is, the rear longitudinal beam reinforcing plate 5 covers the contact area between the bottom plate 101 of the longitudinal arm mounting bracket 1 and the rear longitudinal beam 9, so as to improve the rigidity of the longitudinal arm mounting bracket 1 at the connection of the rear longitudinal beam 9.

[0058] like Figure 2 , Figure 3 and Figure 8 As shown, optionally, the rear suspension trailing arm assembly also includes a sill reinforcement plate 6, which is used to install on the side of the sill beam 11 facing the vehicle interior, and the sill reinforcement plate 6 is connected to the rear longitudinal beam 9, the rear floor under-beam 10 and the sill beam 11.

[0059] Specifically, the sill reinforcement plate 6 extends in the same direction as the sill beam 11, roughly along the direction shown by the X-axis. The sill reinforcement plate 6 is located on the side of the sill beam 11 facing the interior of the vehicle and is welded to the sill beam 11 to strengthen the sill beam 11.

[0060] In addition, the sill reinforcement plate 6 is located on the positive X-axis side of the longitudinal arm mounting bracket 1, that is, in front of the longitudinal arm mounting bracket 1. The negative X-axis end of the sill reinforcement plate 6 is connected to the rear longitudinal beam 9 and the rear floor under-beam 10, achieving stable installation of the sill reinforcement plate 6. This allows the force transmitted to the longitudinal arm mounting bracket 1 to be transmitted backward along the X-axis via the rear longitudinal beam 9, and also forward along the rear longitudinal beam 9 to the sill reinforcement plate 6. Figure 8 As shown, increasing the force transmission path in the X direction results in a more even distribution of force, which helps ensure the stability of the structure.

[0061] like Figure 4 As shown, optionally, the ends of the first side plate 1021 and the second side plate 1022 away from the bottom plate 101 are bent toward opposite sides to form a first flange 103.

[0062] And / or, the ends of the first rear floor longitudinal beam reinforcing plate 2 and the second rear floor longitudinal beam reinforcing plate 3 away from the rear longitudinal beam 9 are bent toward opposite sides to form a second flange 7.

[0063] Specifically, the ends of the first side plate 1021 and the second side plate 1022 away from the bottom plate 101, that is, the lower ends of the first side plate 1021 and the second side plate 1022, are bent toward the opposite side to form a first flange 103. The first flange 103 can strengthen the rigidity of the lower ends of the first side plate 1021 and the second side plate 1022 and prevent cracks from appearing due to stress concentration.

[0064] The ends of the first rear floor longitudinal beam reinforcing plate 2 and the second rear floor longitudinal beam reinforcing plate 3 away from the rear longitudinal beam 9, that is, the lower ends of the first rear floor longitudinal beam reinforcing plate 2 and the second rear floor longitudinal beam reinforcing plate 3, are bent toward the opposite side to form a second flange 7. The second flange 7 is similar in shape to the first flange 103. The second flange 7 can strengthen the rigidity of the lower ends of the first rear floor longitudinal beam reinforcing plate 2 and the second rear floor longitudinal beam reinforcing plate 3, and avoid cracks due to stress concentration.

[0065] Optionally, the multiple side plates 102 are formed from the same sheet metal through multiple bending processes. The two ends of the sheet metal are welded together to form the frame structure, which is then welded to the base plate 101. Compared to the scheme where multiple side plates 102 are formed separately and then welded, forming multiple side plates 102 from the same sheet metal through stamping and multiple bending processes, followed by welding the two ends of the sheet metal, ensures the rigidity of the frame structure formed by the multiple side plates 102. Compared to the scheme where the entire longitudinal arm mounting bracket 1 is integrally formed, forming the frame structure and the base plate 101 separately and then welding them together reduces the difficulty of structural forming.

[0066] like Figures 4-5 As shown, optionally, at least one of the side plates 102 is provided with a positioning through hole 104; for example, positioning through holes 104 can be provided on the first side plate 1021, the second side plate 1022 and the third side plate 1023. Taking the positioning through hole 104 on the first side plate 1021 as an example, the first rear floor longitudinal beam reinforcing plate 2 is provided with a positioning through hole at a position corresponding to the positioning through hole 104 on the first side plate 1021. After the first rear floor longitudinal beam reinforcing plate 2 is attached to the first side plate 1021 of the longitudinal arm mounting bracket 1, the positioning pins are used to pass through the positioning through hole on the first rear floor longitudinal beam reinforcing plate 2 and the positioning through hole 104 on the first side plate 1021 in sequence to realize the positioning assembly of the two. Then the two are welded to ensure the assembly accuracy. The function of providing positioning through holes 104 on other side plates of the longitudinal arm mounting bracket 1 is similar and will not be repeated.

[0067] like Figure 5 As shown, optionally, the base plate 101 is provided with an exhaust drain hole 105. When the vehicle undergoes electrophoresis, the electrophoretic liquid and the gas inside it can be quickly discharged through the exhaust drain hole 105 to avoid liquid residue affecting the anti-corrosion performance or subsequent assembly.

[0068] like Figures 1-2 As shown, another embodiment of this utility model provides a vehicle including a rear longitudinal beam 9 and the aforementioned rear suspension trailing arm assembly, wherein the trailing arm mounting bracket 1 of the rear suspension trailing arm assembly is mounted on the bottom wall of the rear longitudinal beam 9. The advantages of this vehicle compared to related technologies are the same as those of the aforementioned rear suspension trailing arm assembly, and will not be repeated here.

[0069] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A rear suspension trailing arm assembly characterized by, The system includes a trailing arm mounting bracket (1) and a rear suspension trailing arm (8). The trailing arm mounting bracket (1) includes a base plate (101) and multiple side plates (102). The base plate (101) is used to connect with the bottom wall of the rear longitudinal beam (9). The multiple side plates (102) are arranged around the base plate (101) to form a frame structure. One end of the frame structure is connected to the base plate (101). The rear suspension trailing arm (8) extends from the other end of the frame structure and is rotatably connected to the frame structure.

2. The rear suspension trailing arm assembly of claim 1 wherein, It also includes a first rear floor longitudinal beam reinforcement plate (2), and the plurality of side plates (102) include a first side plate (1021) and a second side plate (1022) spaced apart along the left and right direction of the vehicle. The rear suspension trailing arm (8) is rotatably connected to the first side plate (1021) and the second side plate (1022). The first side plate (1021) is located on the side of the second side plate (1022) facing the interior of the vehicle. The first rear floor longitudinal beam reinforcement plate (2) is located on the side of the first side plate (1021) facing the exterior of the frame structure. The first rear floor longitudinal beam reinforcement plate (2) is connected to the side wall of the first side plate (1021) and the rear longitudinal beam (9) facing the interior of the vehicle, respectively.

3. The rear suspension trailing arm assembly of claim 2, wherein, It also includes a second rear floor longitudinal beam reinforcement plate (3), which is located on the side of the second side plate (1022) facing the outside of the frame structure. The second rear floor longitudinal beam reinforcement plate (3) is connected to the bottom wall of the second side plate (1022) and the rear longitudinal beam (9) respectively.

4. The rear suspension trailing arm assembly of claim 3, wherein, It also includes a longitudinal arm mounting support plate (4), and the plurality of side plates (102) also include a third side plate (1023), the third side plate (1023) being connected between one end of the first side plate (1021) and the second side plate (1022), the longitudinal arm mounting support plate (4) being located on the side of the third side plate (1023) facing the outside of the frame structure, and the longitudinal arm mounting support plate (4) being connected to the third side plate (1023), the first rear floor longitudinal beam reinforcing plate (2), the second rear floor longitudinal beam reinforcing plate (3), the rear longitudinal beam (9), the rear floor lower crossbeam (10), and the sill beam (11).

5. The rear suspension trailing arm assembly of claim 4, wherein, The first rear floor longitudinal beam reinforcing plate (2), the longitudinal arm mounting bracket (1) and the rear longitudinal beam (9) enclose a first chamber (100). And / or, the second rear floor longitudinal beam reinforcing plate (3), the longitudinal arm mounting bracket (1) and the rear longitudinal beam (9) enclose a second chamber (200). And / or, the longitudinal arm mounting support plate (4) and the longitudinal arm mounting bracket (1) and the rear longitudinal beam (9) enclose a third chamber (300).

6. The rear suspension trailing arm assembly of claim 4 wherein, It also includes a rear longitudinal beam reinforcing plate (5), in which a portion of the rear longitudinal beam (9) is recessed toward the underside of the vehicle to form a cavity (901), the rear longitudinal beam reinforcing plate (5) is placed in the cavity (901) and corresponds to the position of the longitudinal arm mounting bracket (1), and the rear longitudinal beam reinforcing plate (5) is connected to the bottom wall and the side wall of the cavity (901).

7. The rear suspension trailing arm assembly of claim 4 wherein, It also includes a door sill reinforcement plate (6), which is used to install on the side of the door sill beam (11) facing the interior of the vehicle. The door sill reinforcement plate (6) is connected to the rear longitudinal beam (9), the rear floor underbeam (10) and the door sill beam (11).

8. The rear suspension trailing arm assembly of claim 3 wherein, The first side plate (1021) and the second side plate (1022) are bent at the ends away from the bottom plate (101) toward opposite sides to form a first flange (103). And / or, the first rear floor longitudinal beam reinforcement plate (2) and the second rear floor longitudinal beam reinforcement plate (3) are bent at the ends away from the rear longitudinal beam (9) toward opposite sides to form a second flange (7).

9. The rear suspension trailing arm assembly of claim 1 wherein, The multiple side panels (102) are formed by bending the same sheet of material multiple times. The two ends of the sheet of material are welded together to form the frame structure. The frame structure is welded to the bottom plate (101). And / or, at least one of the side plates (102) is provided with a positioning through hole (104). And / or, the base plate (101) is provided with an exhaust and leakage hole (105).

10. A vehicle characterized by comprising: Includes a rear longitudinal beam (9) and a rear suspension trailing arm assembly as described in any one of claims 1-9, wherein the trailing arm mounting bracket (1) of the rear suspension trailing arm assembly is mounted on the bottom wall of the rear longitudinal beam (9).

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