Flow guide unit and rear bumper assembly with same

Abstract

The invention relates to the field of vehicle parts, in particular to a flow guide unit and a rear bumper assembly with the flow guide unit. The flow guide plates comprise a first flow guide plate and a second flow guide plate; the first flow guide plate is connected with the rear bumper inner plate through the second flow guide plate; the second flow guide plate comprises an inner plate flow guide body, and a flow guide through groove is formed in the inner plate flow guide body; the flow guide through groove is obliquely arranged; one end of the diversion through groove close to the tail of the vehicle is lower than the horizontal plane from one end of the diversion through groove away from the tail of the vehicle; the flow guide unit disclosed by the invention can limit the airflow at the tail part of the vehicle, is used for guiding the airflow at the tail part of the vehicle, reduces the turbulence intensity and wind resistance, shields the assembly gap between the lower decoration plate and the rear protection body, and improves the appearance delicacy and weather resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle parts, in particular to a flow guide unit and a rear bumper assembly having the same. BACKGROUND

[0002] With the continuous advancement of automobile lightweighting and modular design, the rear bumper assembly (rear bumper assembly) as an important part of the automobile exterior system, its structure design and assembly method are increasingly valued.

[0003] The traditional rear bumper assembly usually adopts an integrated structure, which will cause the overall size of the rear bumper assembly to be too large, which is not convenient for actual injection molding production.

[0004] Therefore, a segmented rear bumper assembly structure is derived, which mainly includes a rear bumper body and a lower trim panel. However, the traditional rear bumper body and the lower trim panel are usually directly connected by buckles or bolts, although the structure is simple, but there are many problems in actual use and assembly process: 1. Low assembly efficiency and difficult positioning: In the traditional structure, there is a lack of effective pre-positioning mechanism between the rear bumper body and the lower trim panel, and multiple people need to cooperate or use tooling fixtures to complete positioning during assembly, which cannot achieve single-handed pre-hanging, resulting in low assembly efficiency and slow rhythm, which is difficult to meet the requirements of modern vehicle manufacturing for high rhythm and flexible production.

[0005] 2. Poor connection reliability and easy to produce abnormal sound: Since the rear bumper body and the lower trim panel are only connected by buckles, there is a lack of horizontal limiting structure, and during high-speed driving of the vehicle, the lower trim panel is easily affected by crosswind and road excitation, which causes the lower trim panel to move horizontally, thereby causing "pounding abnormal sound", affecting the NVH performance and user experience.

[0006] 3. Thermal expansion difference leads to change of assembly gap: The rear bumper body and the lower trim panel are usually made of PP or other thermoplastic materials by injection molding, and the thermal expansion coefficient is large.

[0007] In the use environment with significant temperature difference change, the linear misalignment of the two due to thermal expansion and contraction easily leads to uneven assembly gap, thereby affecting the appearance quality and structural stability.

[0008] 4. Insufficient rigidity of rear bumper end mounting structure and low modal: The traditional rear bumper end usually adopts a dispersed support to connect with the vehicle body, the mounting point layout is dispersed, and an effective closed force transmission path is not formed, resulting in low end structure rigidity and low modal frequency, which easily causes resonance and surface difference exceeding the standard (>0.5 mm) during high-speed driving or low-speed collision, increasing the maintenance cost.

[0009] 5. Aerodynamic performance and appearance delicacy are difficult to be reconciled: the existing rear protection assembly is less considered in the design of the tail airflow guiding function, and the turbulence and tail vortex are easy to be generated at the tail of the vehicle, which increases the wind resistance and affects the rear wheel grip; at the same time, the assembly gap between the lower trim panel and the rear protection body is exposed, lacks shielding structure, and affects the appearance delicacy and weather resistance.

[0010] 6. The decorative part has single function and low structural integration: the bright strip on the traditional lower trim panel is only used as an appearance decorative part, and is fixed by double-sided adhesive tape or buckle, has single function, and cannot be integrated with functions such as structural reinforcement, weight reduction or airflow guiding, resulting in system redundancy and cost increase.

[0011] The existing patent CN120327432A-a rear protection assembly does not explicitly disclose the technical content for solving the above technical problems.

[0012] Therefore, in order to improve or solve the above at least one technical problem, it is necessary to optimize the design of the existing rear protection structure. SUMMARY

[0013] The purpose of the present application is to provide a tail flow guiding unit for vehicle tail which can limit the airflow of vehicle tail.

[0014] In order to achieve the above purpose, the technical scheme adopted by the present application is: A flow guiding unit, comprising a flow guiding plate; the flow guiding plate comprises a first flow guiding plate and a second flow guiding plate; the first flow guiding plate is connected with the rear protection inner plate through the second flow guiding plate; The second flow guiding plate comprises an inner plate flow guiding body, and a flow guiding through slot is arranged on the inner plate flow guiding body; the flow guiding through slot is inclinedly arranged; The height of the flow guiding through slot close to the tail end from the horizontal plane is lower than the height of the flow guiding through slot away from the tail end from the horizontal plane.

[0015] The first flow guiding plate comprises an outer plate flow guiding body; The outer plate flow guiding body comprises a first flow guiding base plate, a first flow guiding side plate and a wrapping flange; the first flow guiding base plate is connected with the wrapping flange through the first flow guiding side plate; The first flow guiding side plate comprises a main flow guiding side plate and a branch flow guiding side plate; the extension directions of the main flow guiding side plate and the branch flow guiding side plate are different; One end of the branch flow guiding side plate abuts against the second flow guiding plate, and the other end abuts against the end part of the lower trim panel body; the flow guiding through slot extends to the outer side surface of the branch flow guiding side plate in the first flow guiding plate; The inner plate flow guiding body comprises a second flow guiding base plate and a second flow guiding side plate, The second flow guiding base plate is a stepped plate, and the flow guiding through slot is arranged on the second flow guiding side plate.

[0016] The second flow guide side plate comprises a second flow guide base and a second flow guide edge plate; the thickness of the second flow guide edge plate is smaller than the thickness of the second flow guide base; the flow guide channel is located at the connection between the second flow guide base and the second flow guide edge plate.

[0017] A support pad is arranged on the second flow guide edge plate and is arranged on the side of the second flow guide edge plate close to the rear body.

[0018] A rear assembly, a rear unit, the rear unit comprises a rear body, the rear body is connected with a lower trim plate; the rear body is connected with the lower trim plate; The rear body is provided with the flow guide unit at the end; the flow guide unit is connected to the rear body and overlaps the end of the lower trim plate.

[0019] The rear body comprises a rear main body; the rear main body comprises a rear base; the lower trim plate comprises a trim plate body; the trim plate body comprises a trim plate base; the outer plate flow guide body is connected with the lower trim plate through a buckling unit.

[0020] The buckling unit comprises a first buckling flange arranged at the end of the outer plate flow guide body and a second buckling flange arranged at the end of the lower trim plate; the first buckling flange and the second buckling flange are both L-shaped; the first buckling flange and the second buckling flange are hung and limited to each other.

[0021] The rear base and the trim plate base are provided with a positioning unit therebetween; The positioning unit comprises a plug-in protrusion arranged on the rear base and a plug-in groove arranged on the trim plate base; the rear base is plugged into the plug-in groove of the trim plate base through the plug-in protrusion.

[0022] The rear base comprises a rear base plate, the rear base plate is provided with a protruding lip at the end; the lower trim plate is hung on the protruding lip of the rear body.

[0023] The lower trim plate is provided with a bright strip unit, the bright strip unit is embedded on the lower trim plate; the bright strip unit comprises a bright strip body, the bright strip body is clamped on the lower trim plate.

[0024] The advantages of the present application are that; The present application discloses a flow guide unit and a rear assembly with the flow guide unit.

[0025] The flow guide unit disclosed by the present application can limit the airflow at the tail of the vehicle, guide the airflow at the tail of the vehicle, reduce the turbulence intensity and wind resistance, and shield the assembly gap between the lower trim plate and the rear body, thereby improving the appearance delicacy and weather resistance. BRIEF DESCRIPTION OF DRAWINGS

[0026] Brief Description of the Drawings Figure 1 Structure diagram of the guide unit in the present application.

[0027] Figure 2 Structure diagram of the first guide plate in the present application.

[0028] Figure 3 Structure diagram of the second guide plate in the present application.

[0029] Figure 4 Structure diagram of the rear protection assembly in the first perspective in the present application.

[0030] Figure 5 Structure diagram of the rear protection assembly in the second perspective in the present application.

[0031] Figure 6 Structure diagram of the rear protection assembly in the third perspective in the present application.

[0032] Figure 7 Structure diagram of the lower trim plate and the guide unit in the present application.

[0033] Figure 8 Structure diagram of the rear protection body and the guide unit in the present application. Figure 7 Enlarged view of the local area.

[0034] Figure 9 Structure diagram of the rear protection body and the guide unit in the present application.

[0035] Figure 10 Structure diagram of the rear protection body and the guide unit in the present application.

[0036] Figure 11 Structure diagram of the rear protection body and the mounting structure in the present application.

[0037] Figure 12 Structure diagram of the integral mounting frame in the present application.

[0038] Figure 13 Structure diagram of the upper mounting bracket in the first perspective in the present application.

[0039] Figure 14 Structure diagram of the upper mounting bracket in the first perspective in the present application.

[0040] The marks in the above figures are as follows: 1, end mounting mechanism, 2, upper edge mounting mechanism, 3, lower trim plate, 4, bright strip unit, 5, guide unit, 6, rear protection body. DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0042] A rear bumper assembly includes a rear bumper unit, the rear bumper unit comprising a rear bumper body 6, the rear bumper body 6 being connected to a lower trim panel 3; the rear bumper body 6 and the lower trim panel 3 are connected; the rear bumper body 6 includes a rear bumper main body; the rear bumper main body includes a rear bumper base 61; the lower trim panel 3 includes a trim panel body; the trim panel body includes a trim panel base 31; a positioning unit 3-6 is provided between the rear bumper base 61 and the trim panel base 31; the positioning unit 3-6 includes an insertion protrusion 62 provided on the rear bumper base 61 and an insertion groove 3 provided on the trim panel base 31; the rear bumper base 61 is inserted into the insertion groove 3 of the trim panel base 31 through the insertion protrusion 62. This invention discloses a rear bumper assembly, which mainly includes a rear bumper body 6 and a lower trim panel 3. The two-section main structure facilitates the assembly and actual production of the rear bumper assembly.

[0043] In addition, by setting the positioning units 3-6, the rear bumper body 6 is essentially inserted into the lower trim panel 3, thereby better limiting the lateral position of the rear bumper body 6 and the lower trim panel 3, avoiding the problem of easy shaking caused by the traditional single buckle connection.

[0044] In this invention, the rear bumper base 61 serves as the main load-bearing plane of the entire rear bumper assembly, transmitting the collision force, pedestrian protection reaction force, and concentrated load at the mounting point to the downward trim panel 3 and the vehicle body.

[0045] The insertion protrusion 62 provides guidance and then interference clamping; Effect: During assembly: pre-attachment can be completed with one hand; during use, it can counteract the alternating lateral force generated by crosswinds on the lower trim panel 3 during vehicle operation, eliminating "slapping noise".

[0046] The decorative panel substrate 31 combines both "decorative" and "functional" aspects.

[0047] After the insertion groove 3 is compensated, the linear misalignment between the substrate 61 and the decorative panel substrate 31 under thermal expansion is prevented.

[0048] The interlocking interference and reverse clamping form a "micro-pre-tightening" system.

[0049] In this invention, the rear bumper body and the lower trim panel 3 are generally made of plastic material, typically PP material, and are generally produced using injection molding.

[0050] Further, in the application, the positioning unit 3-6 is arranged in the middle area of the rear cover base body 61 and the trim base body 31; the rear cover body and the lower trim plate 3 are connected in a lap joint plus buckle connection mode; and the positioning unit 3-6 is arranged in the middle area of the rear cover base body 61 and the trim base body 31, so that the rear cover body 6 and the lower trim plate 3 can be positioned and mounted in the middle area during subsequent use, and the hanging and mounting of the two are realized.

[0051] Further, in the application, the rear cover body 6 further comprises a connecting plate unit arranged on the rear cover base body 61, the connecting plate unit comprising an upper end connecting plate 64 and a lower end connecting plate 65 arranged on the rear cover base body 61; the rear cover body 6 is provided with a mounting structure; the mounting structure comprises an end mounting mechanism 1 arranged at the end of the rear cover body 6; the end mounting mechanism comprises an integral mounting frame 11; the integral mounting frame 11 comprises a frame body 101, and the two ends of the frame body 101 are respectively abutted on the adjacent upper end connecting plate 64 or lower end connecting plate 65 of the rear cover body 6; in the application, the rear cover base body 61 is provided with the upper end connecting plate 64 and the lower end connecting plate 65, and the upper end connecting plate 64 and the lower end connecting plate 65 are essentially a flanging piece, so that the vertical section of the rear cover body is similar to a shape; such arrangement facilitates the limitation of the installation position of the integral mounting frame 11.

[0052] Specifically, in the application, the two ends of the integral mounting frame 11 are respectively abutted on the upper end connecting plate 64 and the lower end connecting plate 65 of the rear cover base body 61, so that the rear cover end part forms a simply supported beam stress system; two connecting plates are integrally formed on the rear cover base body 61, and the two ends of the single-piece grid-shaped integral mounting frame 11 are simultaneously abutted on the two connecting plates, so that the rear cover end part forms a simply supported beam self-centering system, so that under the conditions of thermal expansion and contraction and low-speed collision, the tail face difference is ≤0.2 mm, and the maintenance cost is ↓50% or more.

[0053] The upper end connecting plate 64 and the lower end connecting plate 65 are integrally injection molded with the rear cover base body 61, which not only facilitates the subsequent installation of the rear cover assembly, but also facilitates the cooperation with the integral mounting frame 11, and can also be used to diffuse the concentrated force from the frame to the rear cover base body 61 in the subsequent use.

[0054] In the application, the connecting plate unit mainly comprises an upper end connecting plate 64 and a lower end connecting plate 65; in the application, the upper end connecting plate 64 and the lower end connecting plate 65 are arranged on the rear cover base body 61; the upper end connecting plate 64 and the lower end connecting plate 65 provide local reinforcement, form mounting fulcrums, and transfer loads; and provide a “abutment interface” for the subsequent mounting structure.

[0055] In the application, the end mounting mechanism 1 mainly comprises an integral mounting frame 11; the integral mounting frame 11 is essentially a mounting bracket piece, realizes the rigid connection of the rear cover assembly and the end part of the vehicle body, and bears the function of the main mounting point.

[0056] The integral mounting frame 11 comprises a frame body 101 (grid-shaped / integral); spans the rear bumper body 6 area, disperses the concentrated force, avoids local stress concentration; improves the modal frequency and suppresses vibration.

[0057] In subsequent use, the integral mounting frame 11 is mounted on the vehicle body, and then the rear bumper assembly is mounted on the vehicle body.

[0058] The integral mounting frame 11 is pressed on the rear bumper body; the pressing structure allows a certain range of sliding / compression deformation, realizes pre-positioning before bolt fastening; the friction contact between the connecting plate unit and the frame body 101 plays a temporary fixing role, reducing the need for tool clamps; the integral frame partitions the rear bumper body 6 and reinforces it to avoid low-frequency resonance.

[0059] Further, in the present application, one end of the integral mounting frame 11 is clamped with the upper end connecting plate 64 on the rear bumper body 6, and the other end is connected with the lower end connecting plate 65 on the rear bumper body 6 through fasteners; the upper end connecting plate 64 of the present application is clamped on the upper end connecting plate 64 of the rear bumper body 6 through multiple buckles, and the lower end connecting plate 65 is attached to the lower end connecting plate 65 of the rear bumper body 6, and then cooperates with the fasteners to realize the fixed installation of the integral mounting frame 11 on the rear bumper body.

[0060] In subsequent installation, the integral mounting frame 11 is required to be installed on the vehicle body first, generally connected to the vehicle body through fasteners.

[0061] In subsequent installation, the rear bumper unit is overlapped on the lower end connecting plate 65, and the upper end of the rear bumper unit is connected with the clamping groove of the upper end connecting plate 64, thereby realizing the installation and connection between the rear bumper unit and the integral frame.

[0062] Further, in the present application, the rear bumper base body 61 comprises a rear bumper base plate, and the rear bumper base plate is provided with a raised lip 63 at the end; the lower trim plate 3 is hung on the raised lip 63 of the rear bumper body 6; the raised lip 63 is a raised structure, and the lower trim plate 3 is provided with a groove area, and the lower trim plate 3 is sleeved on the raised lip 63 through the groove area in subsequent use, based on this design, the hanging positioning of the lower trim plate 3 on the rear bumper body is facilitated.

[0063] Further, in the present application, the integral mounting frame 11 further comprises a raised support 12 provided on the frame body 101, and the raised support 12 is connected with the vehicle body skeleton; the raised support 12 is designed in a raised manner on the integral mounting frame 11, and can be inserted on the vehicle body skeleton in subsequent use, thereby realizing the stability of the rear bumper assembly installation; in order to facilitate the accuracy and stability of the installation position of the rear bumper assembly, a groove structure can be provided on the vehicle body skeleton; the insertion and positioning of the integral mounting frame 11 are facilitated.

[0064] Further, the frame body 101 is arranged in a grid structure in the present application; the frame body 101 is arranged in close contact with the inner side of the rear body 6; the frame body 101 adopts a grid structure in the present application, which not only ensures the structural strength of the frame body 101, but also helps to reduce the weight of the integral mounting frame; in addition, the frame body 101 is arranged in close contact with the inner side of the rear body 6 in the present application; based on this design, the contact area of the integral mounting frame 11 and the rear body is well ensured; such arrangement makes the integral mounting frame 11 act as a reinforcing member, which better ensures the structural strength of the end of the rear assembly.

[0065] Further, the mounting structure further comprises an upper edge mounting mechanism 2 in the present application; the upper edge mounting mechanism 2 is mainly arranged on the upper end of the rear body; the upper edge mounting mechanism 2 acts as a front end connecting member and a hanging member, which is used in cooperation with the end mounting mechanism 1 to better ensure the mounting and fixing of the rear assembly on the vehicle body.

[0066] Specifically, the upper edge mounting mechanism 2 comprises an upper mounting bracket 201 in the present application; the upper mounting bracket 201 is the main structure of the upper edge mounting mechanism 2 in the present application; the upper mounting bracket 201 comprises a bracket body 21 in the present application, and a buckle unit is arranged on the bracket body 21; a limiting unit is arranged on the bracket body 21, and the limiting unit comprises a longitudinal limiting unit and a transverse limiting unit; the buckle unit is mainly a clamping block on the bracket body 21, which facilitates the clamping with the rear body.

[0067] The limiting unit plays a good installation limiting role in the present application; the longitudinal limiting unit comprises a longitudinal hanging plate 22 arranged on the bracket body 21 in the present application, and the longitudinal hanging plate 22 comprises a longitudinal first plate 221 and a longitudinal second plate 222; the longitudinal second plate 222 is connected with the bracket body 21 through the longitudinal first plate 221; the longitudinal hanging plate 22 is a reverse L-shaped plate; the longitudinal hanging plate 22 is hung on the upper end connecting plate 64 in the rear body 6; the transverse limiting unit comprises a longitudinal limiting plate arranged on the longitudinal L-shaped plate and a clamping groove arranged on the upper end connecting plate 64 in the rear body 6; the longitudinal hanging plate 22 forms a reverse hook structure in the present application, and the longitudinal hanging plate 22 is hung on the upper end connecting plate 64 in subsequent use; the longitudinal limiting plate is arranged on the inner wall of the longitudinal hanging plate 22 in the present application; one function is to increase the structural strength of the longitudinal hanging plate 22, and the other function is to act as a limiting member, which can cooperate with the clamping groove on the rear body to realize the installation limiting between the upper mounting bracket 201 and the rear body.

[0068] Two end mounting mechanisms 1 and two upper edge mounting mechanisms 2 are arranged on the rear body in the present application; the two end mounting mechanisms 1 are distributed at the two ends of the rear body, and the upper edge mounting mechanism 2 is arranged at the middle region of the upper end of the rear body.

[0069] Further, in the application, the lower trim plate 3 is provided with a bright strip unit 4, the bright strip unit 4 is embedded on the lower trim plate 3; the bright strip unit 4 comprises a bright strip body, the bright strip body is clamped on the lower trim plate 3; in the application, the bright strip unit 4 mainly serves as a warning function, the bright strip body is essentially a reflective bright strip structure, and the bright strip body is clamped on the lower trim plate 3 through buckling.

[0070] In addition, in the application, the bright strip body is embedded on the lower trim plate 3, generally a sink is designed on the lower trim plate 3, and the subsequent bright strip is arranged in the sink, and the bright strip body can also serve as a reinforcing piece to facilitate guaranteeing the structural strength of the lower trim plate 3; meanwhile, the sink designed on the lower trim plate 3 can also play a good weight reduction effect.

[0071] Further, in the application, the lower trim plate 3 is provided with a bright strip unit 4, the bright strip unit 4 is embedded on the lower trim plate 3; the bright strip unit 4 comprises a bright strip body, the bright strip body is clamped on the lower trim plate 3; in the application, the bright strip unit 4 mainly serves as a warning function, the bright strip body is essentially a reflective bright strip structure, and the bright strip body is clamped on the lower trim plate 3 through buckling.

[0072] In addition, the lower trim plate 3 is provided with a sink structure corresponding to the bright strip body, the bright strip body is embedded in the sink, and surface installation is realized; the sink structure not only realizes positioning and hidden installation of the bright strip body, but also has a weight reduction function, which helps to reduce the overall quality of the lower trim plate 3.

[0073] The bright strip body forms a local structure reinforcement with the lower trim plate 3 in the installed state, and improves the structural rigidity and deformation resistance of the lower trim plate 3 in the bright strip arrangement area.

[0074] Further, in the application, the rear protection body 6 is provided with a flow guide unit 5 at the end; the flow guide unit 5 is connected to the rear protection body 6 and overlaps the end of the lower trim plate 3; in the application, the end of the rear protection body 6 close to the vehicle side is provided with a flow guide unit 5; the flow guide unit 5 is assembled at the end of the rear protection body 6, generally extends forward along the X direction of the vehicle, and the downstream end overlaps the upper surface of the corresponding end of the lower trim plate 3; in the application, one flow guide unit 5 is arranged at each end of the rear protection body 6; a flow guide channel 54 is formed between the flow guide unit 5 and the rear protection body 6; for guiding the airflow at the tail of the vehicle, reducing the turbulence intensity and wind resistance, and shielding the assembly gap between the lower trim plate 3 and the rear protection body 6, improving the appearance delicacy and weather resistance.

[0075] Specifically, the flow guide unit 5 in the application comprises a flow guide plate 501; the flow guide plate 501 comprises a first flow guide plate 51 and a second flow guide plate 52; the first flow guide plate 51 is connected with the rear bumper body through the second flow guide plate 52; the second flow guide plate 52 comprises an inner plate flow guide body, and a flow guide through groove 54 is arranged on the inner plate flow guide body; the flow guide through groove 54 is arranged obliquely; the height of the end of the flow guide through groove 54 close to the car tail from the horizontal plane is lower than the height of the end of the flow guide through groove 54 away from the car tail from the horizontal plane; the flow guide through groove 54 between the flow guide plate 501 and the rear bumper body in the application is specifically formed; a cantilever type flow guide structure is formed; and the flow of the car tail can be optimized.

[0076] In the application, the flow guide through groove 54 is arranged through the inner plate flow guide body, the groove bottom surface of the flow guide through groove 54 is arranged obliquely relative to the horizontal plane, the height of the downstream end groove bottom close to the car tail is lower than the height of the upstream end groove bottom away from the car tail; the oblique flow guide through groove 54 is used for guiding the high-pressure airflow in the car tail to be deflected downward, increasing the grip of the rear wheels of the vehicle and reducing the risk of the vehicle fishtailing.

[0077] In the application, the flow guide unit 5 comprises the flow guide plate 501, the flow guide plate 501 extends forward along the X direction of the vehicle, the root of the flow guide plate 501 is fastened and connected with the rear bumper body 6, and the side surface of the flow guide plate 501 is arranged spaced apart from the rear bumper body to form the flow guide through groove 54.

[0078] In the application, the flow guide plate 501 comprises the first flow guide plate 51 and the second flow guide plate 52, and the first flow guide plate 51 and the second flow guide plate 52 are essentially inner and outer plate structures; the structural strength of the flow guide plate 501 is ensured.

[0079] In the application, the flow guide through groove 54 is arranged through the inner plate flow guide body, the groove bottom surface of the flow guide through groove 54 is arranged obliquely relative to the horizontal plane by an angle of 3°-8°, forming a slope structure of “upstream high and downstream low”; the height of the downstream end groove bottom close to the car tail is lower than the height of the upstream end groove bottom away from the car tail; during work, the high-pressure airflow in the car tail generates a downward deflection speed component under the guidance of the oblique bottom surface of the flow guide through groove 54, forming a low-pressure sweeping jet flow, suppressing the rolling up of the tail vortex and reducing the wind resistance of the whole vehicle; the downward deflection airflow forms a local downwash in front of the rear wheels, increasing the ground load of the rear wheels and improving the grip of the rear wheels during high-speed driving, thereby reducing the risk of the vehicle fishtailing; meanwhile, the through design of the flow guide through groove 54 avoids the accumulation of mud in the groove, and the weather resistance and self-cleaning functions are considered.

[0080] Further, the first flow guide plate 51 comprises an outer plate flow guide body; the outer plate flow guide body comprises a first flow guide base plate 511, a first flow guide side plate 512 and a wrapping flange 513; the first flow guide base plate 511 is connected with the wrapping flange 513 through the first flow guide side plate 512; based on the design, the outer plate flow guide body is in an overall inverted L-shaped structure; the inner plate flow guide body comprises a second flow guide base plate 521 and a second flow guide side plate 522; in the application, the inner plate flow guide body is in an overall inverted L-shaped structure, and the subsequent inner plate flow guide plate 501 is placed on the outer plate flow guide plate 501; the wrapping flange 513 is arranged at the end of the first flow guide side plate 512; it plays a good installation limiting role, facilitates the embedded installation of the inner plate flow guide body on the outer plate flow guide plate 501, and the inner plate flow guide body and the outer plate flow guide plate 501 can be connected by cementing.

[0081] In the application, the first flow guide side plate 512 comprises a main flow guide side plate 5121 and a branch flow guide side plate 5122; the main flow guide side plate 5121 and the branch flow guide side plate 5122 are different in the extension direction; the main flow guide side plate 5121 plays a role in lateral support connection, and the branch flow guide side plate 5122 is arranged to play a good bridging role, facilitating the lap joint of the inner plate flow guide plate 501 and the lower trim plate 3.

[0082] In the application, one end of the branch flow guide side plate 5122 abuts against the second flow guide plate 52, and the other end abuts against the end of the lower trim plate 3 body; the flow guide through slot 54 extends to the outer side of the branch flow guide side plate 5122 in the first flow guide plate 51; the flow guide through slot 54 is arranged on the second flow guide side plate 522; in the application, based on the design, it is convenient for airflow to pass through the flow guide unit 5; and the smoothness of airflow operation is ensured.

[0083] In the application, the second flow guide base plate 521 is a stepped plate, which greatly ensures the structural strength of the second flow guide base plate 521.

[0084] In the application, the first flow guide plate 51 comprises an outer plate flow guide body, and in the application, the first flow guide base plate 511, the first flow guide side plate 512 and the wrapping flange 513 are integrally injection molded.

[0085] In the application, the first flow guide side plate 512 comprises a main flow guide side plate 5121 and a branch flow guide side plate 5122; in the application, the main flow guide side plate 5121 is distributed with the rear body; the branch flow guide side plate 5122 is lapped on the rear body and the lower trim plate 3.

[0086] In the application, the front end of the branch flow guide side plate 5122 abuts against the end of the second flow guide plate 52, and the rear end abuts against the end of the lower trim plate 3, so as to improve the overall rigidity of the flow guide plate 501 and close the assembly step difference.

[0087] In the application, the flow guide channel 54 continuously extends from the second flow guide side plate 522 to the outer side of the branch flow guide side plate 5122, so that the inclined flow guide channel 54 penetrates the entire flow guide plate 501 in the front-back direction, ensuring the continuity of the downward deflection of the airflow.

[0088] In the application, the second flow guide plate 52 includes an inner plate flow guide body, which includes a second flow guide base plate 521 that is bolted to the rear body 6.

[0089] The second flow guide side plate 522 is arranged in intersection with the second flow guide base plate 521, and the flow guide channel 54 is provided through the second flow guide side plate 522, with a groove bottom inclination angle α = 4°-8° and a downstream end 2-8 mm lower than the upstream end. The flow guide channel 54 forms a complete inclined channel between the second flow guide side plate 522 and the branch flow guide side plate 5122, and after the airflow enters the flow guide channel 54, it is continuously guided downward and adheres to the lower trim plate 3 to flow out, further reducing the strength of the tail vortex and improving the adhesion of the rear wheel, while taking into account the structural rigidity, lightweight and aerodynamic performance.

[0090] Further, in the application, the second flow guide side plate 522 includes a second flow guide base 5221 and a second flow guide edge plate 5222; the thickness of the second flow guide edge plate 5222 is less than the thickness of the second flow guide base 5221; the flow guide channel 54 is located at the connection between the second flow guide base 5221 and the second flow guide edge plate 5222; such arrangement forms an L-shaped structure, that is, a stepped platform is formed between the second flow guide base 5221 and the second flow guide edge plate 5222, which facilitates the formation of a gap between the second flow guide side plate 522 and the rear body during subsequent use, facilitating the operation and guidance of the airflow.

[0091] Further, in the application, the second flow guide edge plate 5222 is provided with a support pad 53, which is arranged on the side of the second flow guide edge plate 5222 close to the rear body; the support pad 53 plays a good supporting role and can be connected to the rear body through a fastener in the subsequent use; the support pad 53 plays a good supporting and protecting role, avoiding the suspended arrangement of the second flow guide edge plate 5222.

[0092] Further, in the application, the outer plate flow guide body is connected to the lower trim plate 3 through a buckling unit; the buckling unit plays a good bridging role, facilitating the hanging and limiting between the outer plate flow guide body and the lower trim plate 3.

[0093] The buckle unit comprises a first buckle flange 55 arranged at the end of the outer plate flow guide and a second buckle flange 311 arranged at the end of the lower trim plate 3; the first buckle flange 55 and the second buckle flange 311 are both L-shaped; the first buckle flange 55 and the second buckle flange 311 are limited by mutual hooking; based on the above design, the first buckle flange 55 and the second buckle flange 311 are both hook structures, which facilitates the hooking and installation of the outer plate flow guide at the end of the lower trim plate 3.

[0094] The core of the technical scheme of the present application is: Modular design: The rear protection assembly is composed of two modules of the rear protection body 6 and the lower trim plate 3, and precise positioning is realized through the plug-in protrusion 62 and the groove.

[0095] The lower trim plate 3 can be hooked on the protruding lip 63 of the rear protection body 6, simplifying assembly.

[0096] Installation structure innovation: Integral mounting frame 11: the grid-shaped frame body 101 spans the rear protection body 6, and the two ends press against the upper end connecting plate 64 and the lower end connecting plate 65, one end is clamped, and the other end is fastened.

[0097] Upper edge mounting mechanism 2: longitudinal / lateral limiting is realized through the inverted L-shaped hooking plate and the longitudinal limiting plate.

[0098] Integrated flow guiding function: The flow guiding unit 5 comprises a first flow guiding plate 51 and a second flow guiding plate 52, and the flow guiding through slot 54 is designed to be inclined to optimize airflow.

[0099] The outer plate flow guide is hooked with the lower trim plate 3 through the buckle unit, enhancing structural stability.

[0100] Combination of decoration and function: The bright strip unit 4 is embedded in the lower trim plate 3, improving appearance while maintaining clamping firmness.

[0101] Overall technical scheme: Rear protection body assembly efficiency is improved: tool-free design of plug-in, hooking, clamping and the like reduces assembly time.

[0102] Structural strength: integral frame and multiple limiting units enhance vibration resistance.

[0103] The inclined flow guiding through slot 54 can improve vehicle tail airflow. Embodiment

[0104] The present application discloses a rear protection assembly mainly comprising a rear protection body 6, a lower trim plate 3, an integral mounting frame 11, an upper mounting bracket 201, a flow guiding plate 501 and a bright strip body.

[0105] Pre-assembly: the rear body 6 is inserted into the lower trim panel 3: The rear body 6 is inserted into the lower trim panel 3, and the transverse positioning of the rear body 6 and the lower trim panel 3 is completed.

[0106] The top end groove of the lower trim panel 3 is hung on the protruding lip 63 of the rear body end, and vertical pre-hanging is achieved.

[0107] At this time, the lower trim panel 3 can be single-handedly kept in position, waiting for subsequent fastening.

[0108] Integral mounting frame 11 installation: The frame body 101 is a grid structure, and the frame body 101 is provided with a fastener passing hole. The fastener can be selected from a screw or a bolt.

[0109] The integral mounting frame 11 is first installed on the vehicle body, and then the rear protection unit is connected to the vehicle body through the integral mounting frame 11.

[0110] Upper edge installation mechanism 2 installation: The inverted L-shaped longitudinal hanging plate 22 of the upper mounting bracket 201 is hung along the -Z direction to the edge of the upper end connecting plate 64; the longitudinal limiting plate is simultaneously slid into the corresponding clamping groove of the upper end connecting plate 64, and Y-direction limiting is provided.

[0111] Air guide unit 5 installation: The second air guide plate 52 is glued and fixed with the first air guide plate 51.

[0112] The outer plate air guide body in the air guide plate 501 is hung on the end of the lower trim panel 3.

[0113] Bright strip unit 4 installation: The bright strip body is clamped on the lower trim panel 3.

[0114] Through the embodiment, the rear protection assembly realizes the integrated scheme of "tool-free pre-hanging + grid frame simple beam + inclined air guide groove + bright strip strengthening", and takes into account the assembly efficiency, structural strength, aerodynamic performance and appearance delicacy.

[0115] Obviously, the specific implementation of the present application is not limited by the above-mentioned manner, and various non-essential improvements using the method concept and technical scheme of the present application are within the protection scope of the present application.

Claims

1. A flow guiding unit, characterized in that The guide plate comprises a first guide plate and a second guide plate; the first guide plate is connected with the rear inner panel through the second guide plate; The second guide plate comprises an inner panel guide body, and a guide channel is arranged on the inner panel guide body; the guide channel is arranged obliquely; The distance between the end of the guide channel close to the tail and the horizontal plane is lower than the distance between the end of the guide channel away from the tail and the horizontal plane.

2. A flow guiding unit according to claim 1, characterized in that The first guide plate comprises an outer panel guide body; The outer panel guide body comprises a first guide base plate, a first guide side plate, and a wrapping flange; the first guide base plate is connected with the wrapping flange through the first guide side plate; The first guide side plate comprises a main guide side plate and a branch guide side plate; the extension directions of the main guide side plate and the branch guide side plate are different; One end of the branch guide side plate abuts against the second guide plate, and the other end abuts against the end of the lower trim panel body; the guide channel extends to the outer side of the branch guide side plate in the first guide plate; The inner panel guide body comprises a second guide base plate and a second guide side plate, The second guide base plate is a stepped plate, and the guide channel is arranged on the second guide side plate.

3. A flow guiding unit according to claim 1, characterized in that The second guide side plate comprises a second guide base and a second guide side plate; the thickness of the second guide side plate is smaller than the thickness of the second guide base; the guide channel is located at the connection between the second guide base and the second guide side plate.

4. A flow directing unit according to claim 1, wherein, A support pad is arranged on the second guide side plate close to the rear panel body.

5. A rear quarter assembly characterized in that, The rear panel unit comprises a rear panel body, and a lower trim panel is connected to the rear panel body; the rear panel body is connected with the lower trim panel; The end of the rear panel body is provided with the guide unit according to any one of claims 1-4; the guide unit is connected to the rear panel body and overlaps the end of the lower trim panel.

6. A rear quarter assembly according to claim 5, wherein, The rear panel body comprises a rear panel main body; the lower trim panel comprises a trim panel body; the outer panel guide body is connected with the lower trim panel through a buckling unit.

7. A rear quarter assembly according to claim 6, wherein, The buckling unit comprises a first buckling flange arranged at the end of the outer panel guide body and a second buckling flange arranged at the end of the lower trim panel; the first buckling flange and the second buckling flange are both L-shaped; the first buckling flange and the second buckling flange are hung and limited to each other.

8. A rear quarter assembly according to claim 6, wherein, A positioning unit is arranged between the rear panel base and the trim panel base; The positioning unit comprises a plug-in protrusion arranged on the rear panel base and a plug-in groove arranged on the trim panel base; the rear panel base is plugged into the plug-in groove of the trim panel base through the plug-in protrusion.

9. A rear quarter assembly according to claim 8, wherein, The rear panel base comprises a rear panel base plate, and a protruding lip is arranged at the end of the rear panel base plate; the lower trim panel is hung on the protruding lip of the rear panel body.

10. A rear quarter assembly according to claim 5, wherein, A bright strip unit is arranged on the lower trim panel; the bright strip unit is embedded on the lower trim panel; the bright strip unit comprises a bright strip body, and the bright strip body is clamped on the lower trim panel.

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