Arrangement method of third-row seat belt, retractor installation structure assembly and vehicle

Abstract

The present application relates to the technical field of vehicles, and particularly relates to an arrangement method for a third-row seatbelt, a retractor mounting structure assembly, and a vehicle. The arrangement method includes: adjusting the positions of the second fixed point at the lower end of the seatbelt and the fixed point at the upper end of the seatbelt so that the obtained webbing area is between the neck extreme point and the shoulder extreme point, and determining the arrangement position of the buckle and the arrangement position of the eyelet. According to the webbing outlet direction of the retractor and the position of the upper fixed point, the first fixed point at the lower end of the seatbelt is determined, and further the arrangement position of the retractor is determined. The retractor mounting bracket is welded to the inner panel assembly of the rear wheelhouse and forms a reticular structure by connecting with the beam system structure on the rear wheelhouse, which can better effectively transfer force and improve the strength and stiffness of the retractor. This bracket also provides mounting points for the seatbelt retractors of the second row and the third row of the vehicle, reducing the number of vehicle parts, simplifying the manufacturing process, and improving the body accuracy and the vehicle lightweight level.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to a method for arranging a third-row seat belt, a retractor mounting structure assembly, and a vehicle. Background Art

[0002] With the electrification transformation of domestic passenger vehicles, the power battery used for vehicle driving has greatly increased the curb weight of the vehicle. Therefore, when the vehicle brakes emergently or collides, the exchange of its inertia or instantaneous kinetic energy also increases accordingly. The vehicle seat belt is one of the key components for vehicle passive safety. The seat belt ensures that the passengers in the vehicle can be well restrained on the seats when the vehicle brakes emergently or collides, preventing the passengers from being thrown out of the seats or even out of the vehicle due to inertia when impacting forward or reversing, thereby avoiding secondary collision injuries. Therefore, its arrangement method, the reliability of the mounting points, and its product quality directly affect the quality of the vehicle and the safety of the passengers in the vehicle. The vehicle seat belt retractor is fixed to the vehicle through a mounting bracket on the vehicle body, and the performance such as the stiffness and strength of the bracket directly affects the service performance of the seat belt.

[0003] Facing the increasingly complex working conditions, on the one hand, there is a lack of a feasible method for arranging the rear-row seat belts of seven-seat vehicles that can meet the requirements of vehicle lightweight, easy manufacturing, and high precision, resulting in the inability to meet the in-vehicle ergonomics during the use of the seat belts; on the other hand, for the arrangement of the rear-row seat belts of seven-seat vehicles, the structure of the retractor mounting bracket parts is complex and heavy, bringing a series of problems to the overall vehicle cost and weight, which is contrary to the current lightweight requirements. Summary of the Invention

[0004] One of the purposes of the present application is to provide a method for arranging a third-row seat belt, which enables the seat belt to meet the requirements of in-vehicle ergonomics during use; the second purpose of the present application is to provide a retractor mounting structure assembly; the third purpose of the present application is to provide a vehicle.

[0005] To achieve the above purposes, in the first aspect, the embodiments of the present application provide a method for arranging a third-row seat belt. The seat belt includes a retractor, a webbing, a suspension ring, a tongue, and a buckle. One end of the webbing is located inside the retractor, and the other end of the webbing is fixedly connected to the floor assembly of the vehicle. Wherein, the arrangement method includes the following steps:

[0006] Taking the mounting point of the suspension ring as the upper fixed point of the seat belt, and taking the connection point of the webbing and the floor assembly as the first lower fixed point of the seat belt;

[0007] Arrange an ergonomic dummy on the vehicle seat, determine the neck limit point and shoulder limit point of the dummy, take the center point of the lock hole of the buckle as the second fixed point of the lower end of the seat belt, extend the connection line between the second fixed point of the lower end of the seat belt and the upper end fixed point of the seat belt in the Y-plane, and extend the intersection line formed by the extension plane and the dummy by a preset distance on both sides to obtain a webbing area. Adjust the positions of the second fixed point of the lower end of the seat belt and the upper end fixed point of the seat belt within their respective regulatory areas so that the obtained webbing area is between the neck limit point and the shoulder limit point, and determine the arrangement position of the buckle and the arrangement position of the eyelet.

[0008] Determine the arrangement position of the retractor according to the webbing outlet direction of the retractor and the position of the upper end fixed point of the seat belt.

[0009] Further, the Y-direction distance between the upper end fixed point of the seat belt and the center point of the seat is not less than 140 mm.

[0010] Further, the Y-direction spacing between the first fixed point of the lower end of the seat belt and the R point of the third-row seat is not less than 120 mm.

[0011] Further, the preset distance is half of the width of the webbing.

[0012] To achieve the above object, in a second aspect, an embodiment of the present application provides a retractor mounting structure assembly, which includes a retractor mounting bracket and a rear wheel hub cover welding assembly. The rear wheel hub cover welding assembly includes an outer rear wheel hub cover and an inner rear wheel hub cover. The retractor mounting bracket is welded to the outer rear wheel hub cover and the inner rear wheel hub cover respectively. The retractor mounting bracket includes a plate body, and a first mounting position and a second mounting position are provided on the plate body. The first mounting position is used to mount the retractor of the third-row seat belt, and the second mounting position is used to mount the retractor of the second-row seat belt; the setting position of the first mounting position is determined by the arrangement method of the third-row seat belt provided in the first aspect of the present application.

[0013] Further, the outer rear wheel hub cover is provided with a first mounting hole in the area corresponding to the first mounting position and a second mounting hole in the area corresponding to the second mounting position.

[0014] Further, the retractor mounting structure assembly further includes a front reinforcing plate of the inner rear wheel cover and a rear reinforcing plate of the inner rear wheel cover. The front reinforcing plate of the inner rear wheel cover forms a rear end flange in the vehicle rear direction, and the rear reinforcing plate of the inner rear wheel cover forms a front end flange in the vehicle front direction. The rear wheel hub cover welding assembly is welded to the rear end flange and the front end flange respectively.

[0015] Further, the retractor mounting structure assembly further includes a rear shock absorber mounting bracket, a lower reinforcement plate at the rear section of the side panel, and a C-pillar reinforcement plate. The retractor mounting bracket, the front reinforcement plate inside the rear wheel housing, the rear reinforcement plate inside the rear wheel housing, the rear shock absorber mounting bracket, the lower reinforcement plate at the rear section of the side panel, and the C-pillar reinforcement plate overlap each other to form a mesh structure.

[0016] Further, the retractor mounting bracket is provided with a raised reinforcing boss, and the reinforcing boss and the outer plate of the rear wheel hub cover enclose a cavity with a closed cross-section.

[0017] To achieve the above object, in a third aspect, an embodiment of the present application provides a vehicle, which includes the retractor mounting structure assembly provided in the second aspect of the present application.

[0018] The technical solutions provided in the embodiments of the present application have the following beneficial effects: The arrangement method of the third-row seat belt meets the requirements of regulations and the comfort of passengers in the vehicle, and conforms to the ergonomic requirements; by arranging the seat belt retractor, the retractors of the second-row and third-row seat belts share one mounting bracket, reducing the number of parts and meeting the lightweight requirement. Moreover, the retractor mounting bracket and the surrounding parts form a closed annular cross-section and a mesh overlapping structure, enabling the seat belt retractor to have sufficient mounting point stiffness and strength to meet severe working conditions, protecting the passengers in the vehicle well from injuries and ensuring the structural integrity of the vehicle. Description of the Drawings

[0019] Figure 1 Showing the layout schematic diagram of the third-row seat belt in the vehicle body structure provided by the embodiment of the present application;

[0020] Figure 2 Showing the layout schematic diagram of the upper fixed point of the seat belt and the first lower fixed point of the seat belt in the embodiment of the present application;

[0021] Figure 3 Showing the layout schematic diagram of the anthropomorphic dummy in the vehicle interior provided by the embodiment of the present application;

[0022] Figure 4 Showing the layout schematic diagram of the seat belt retractor in the embodiment of the present application;

[0023] Figure 5 Showing the three-dimensional structure schematic diagram of the retractor mounting bracket provided by the embodiment of the present application; and

[0024] Figure 6 Showing the partial structure schematic diagram of the retractor mounting structure assembly provided by the embodiment of the present application

[0025] Wherein,

[0026] 110, Retractor; 120, Webbing; 130, Snap Hook; 140, Lock Tongue; 150, Buckle; 160, Upper Fixed Point of Seat Belt; 170, First Lower Fixed Point of Seat Belt; 180, Second Lower Fixed Point of Seat Belt; 190, Retractor;

[0027] 200, Seat; 210, Seat R Point;

[0028] 300, Dummy; 310, Neck Extreme Point; 320, Shoulder Extreme Point;

[0029] 400, Retractor Mounting Bracket; 410, Plate Body; 420, First Mounting Position; 420, Second Mounting Position; 440, Reinforcing Boss;

[0030] 500, Rear Wheelhouse Welding Assembly; 510, Outer Panel of Rear Wheelhouse; 511, First Mounting Hole; 512, Second Mounting Hole; 520, Inner Panel of Rear Wheelhouse;

[0031] 610, Front Reinforcing Plate of Inner Panel of Rear Wheel Cover; 611, Rear Flange; 620, Rear Reinforcing Plate of Inner Panel of Rear Wheel Cover; 621 Front Flange; 630, Rear Shock Absorber Mounting Bracket; 640, Lower Reinforcing Plate of Rear Section of Side Wall; 650, C-Pillar Reinforcing Plate;

[0032] 700, Floor Assembly;

[0033] 800, Mounting Axis. Detailed Implementation Manner

[0034] The following will describe the implementation manners of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention, rather than for limiting the protection scope of the present invention.

[0035] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0036] This embodiment provides a method for arranging the third-row seat belt of a vehicle, as Figure 1As shown in the figure, the basic structure of the seat belt includes a retractor 110, a webbing 120, a buckle 130, a tongue 140 and a buckle 150. The retractor 110 and the buckle 130 are arranged on the vehicle body, the buckle 150 is arranged on the floor assembly 700, and the tongue 140 can be inserted into the lock hole on the buckle 150 to realize the buckling with the buckle 150. One end of the webbing 120 is located inside the retractor 110, and the other end of the webbing 120 is fixedly connected to the floor assembly 700 of the vehicle. In the arrangement method of the third-row seat belt in this embodiment, it involves determining the arrangement position of the upper buckle 130 of the seat belt, the connection point of the webbing 120 and the floor assembly 700 of the vehicle, the arrangement position of the seat belt buckle 150, and the arrangement position of the seat belt retractor 110. Specifically, the arrangement method of the third-row seat belt includes the following steps S1 to S3.

[0037] Step S1: Determine the arrangement areas of the upper fixed point 160 of the seat belt and the first lower fixed point 170 of the seat belt.

[0038] In this embodiment, the installation point of the buckle 130 is used as the upper fixed point 160 of the seat belt, and the connection point of the webbing 120 and the floor assembly 700 is used as the first lower fixed point 170 of the seat belt. Refer to Figure 2 , which shows a schematic diagram of the arrangement areas of the upper fixed point 160 of the seat belt and the first lower fixed point 170 of the seat belt. First, it is necessary to demarcate an area that meets the regulations and human comfort in the vehicle according to crash safety and ergonomics. The buckle 130, the buckle 150, and the connection point of the webbing 120 and the floor assembly 700 of the vehicle should all be arranged within their respective regulatory areas; preferably, the Y-direction distance S1 between the upper fixed point 160 of the seat belt and the center point of the seat 200 is not less than 140 mm, and the Y-direction distance L1 between the first lower fixed point 170 of the seat belt and the R point 210 of the third-row seat is not less than 120 mm.

[0039] Step S2: Determine the arrangement positions of the buckle 150 and the arrangement position of the buckle 130.

[0040] Refer to Figure 3, shown is a layout schematic diagram of the in-vehicle human-machine engineering dummy 300. After the layout areas of the upper fixed point 160 of the seat belt and the first lower fixed point 170 of the seat belt are determined, in order to meet the comfort of in-vehicle passengers, the specific positions of the upper fixed point 160 of the seat belt and the second lower fixed point 180 of the seat belt of the third-row seat belt are determined, as well as the position of the webbing 120 of the seat belt. The center point of the lock hole of the buckle 150 is the second lower fixed point 180 of the seat belt. Specifically, the human-machine engineering dummy 300 is arranged on the in-vehicle seat 200, the neck limit point 310 and the shoulder limit point 320 of the dummy 300 are determined, and the connection line between the second lower fixed point 180 of the seat belt and the upper fixed point 160 of the seat belt is extended in the Y-plane. The intersection line formed by the extended plane and the dummy 300 is extended a preset distance on both sides to obtain the webbing 120 area. The positions of the second lower fixed point 180 of the seat belt and the upper fixed point 160 of the seat belt in their respective regulatory areas are adjusted so that the obtained webbing 120 area is between the neck limit point 310 and the shoulder limit point 320, thereby determining the specific positions of the second lower fixed point 180 of the seat belt and the upper fixed point 160 of the seat belt, and further determining the layout position of the buckle 150 and the layout position of the loop 130.

[0041] Preferably, the preset distance is half of the width of the webbing 120. In this way, the area obtained by extending the intersection line formed by the extended plane and the dummy 300 a preset distance on both sides is the webbing 120 area. For example, the width of the webbing 120 can be selected as 47 mm, and the preset distance is thus 23.5 mm.

[0042] Step S3: Determine the layout position of the retractor 110 according to the webbing outlet direction of the retractor 110 and the position of the upper fixed point.

[0043] See Figure 4 , shown is a layout schematic diagram of the retractor 110 of the seat belt. To ensure the smooth pulling out of the webbing 120 of the seat belt, there are certain requirements for the angle between the webbing outlet direction of the retractor 110 and the vertical direction. According to the preset angle requirements, the installation axis 800 of the retractor 110 of the seat belt is determined. The direction of this installation axis 800 is the webbing outlet direction of the retractor 110. Combining with the specific position of the upper fixed point 160 of the seat belt, the installation axis 800 of the retractor 110 should pass through the upper fixed point 160 of the seat belt, and thus the installation area of the retractor 110 of the seat belt is obtained. Then, combining with the installation space of the vehicle peripheral parts and the manual installation space requirements of the general assembly workshop, an installation hole of a certain size needs to be opened on the outer panel 510 of the rear wheel hub package of the vehicle, so as to lock the layout position of the retractor 110 of the seat belt. The layout method of the third-row seat belt is more in line with the human-machine engineering requirements under the premise of meeting the regulations and the comfort of in-vehicle passengers.

[0044] The embodiment of the present application also provides a retractor mounting structure assembly. As Figures 4 - 6 shown, the retractor mounting structure assembly includes a retractor mounting bracket 400 and a rear hub carrier welding assembly 500. The rear hub carrier welding assembly 500 includes an outer rear hub carrier plate 510 and an inner rear hub carrier plate 520. The retractor mounting bracket 400 is welded to the outer rear hub carrier plate 510 and the inner rear hub carrier plate 520 respectively. The retractor mounting bracket 400 includes a plate body 410. A first mounting position 420 and a second mounting position 430 are provided on the plate body 410. The first mounting position 420 is used to mount the retractor 110 of the third-row seat belt, and the second mounting position 430 is used to mount the retractor 190 of the second-row seat belt. The setting position of the first mounting position 420 is determined by the arrangement method of the third-row seat belt provided in the first aspect of the present application. The seat belt retractor 110 is arranged forward in the vehicle direction with the installation point of the suspension ring 130 as the reference, and is connected to the vehicle body by screwing onto the retractor mounting bracket 400. The retractor mounting bracket 400 can provide mounting points for the retractor 190 of the second-row seat belt and the retractor 110 of the third-row seat belt at the same time. Compared with the traditional way of separately arranging the retractor mounting brackets 400 for the second-row seat belt and the retractor mounting brackets 400 for the third-row seat belt, the retractor mounting bracket 400 can be better connected to the surrounding reinforcement members. Benefiting from a more effective connection method, the mounting point of the seat belt retractor 110 can obtain higher mounting point stiffness and strength. In addition, sharing a retractor mounting bracket 400 for the retractor 190 of the second-row seat belt and the retractor 110 of the third-row seat belt reduces the number of parts and meets the lightweight requirement. Preferably, the retractor mounting bracket 400 is connected to the outer rear hub carrier plate 510 and the inner rear hub carrier plate 520 by resistance welding to form multiple rows of resistance welding points with each other.

[0045] Among them, as Figure 4 shown, the outer rear hub carrier plate 510 is located inside the retractor mounting bracket 400. Therefore, a first mounting hole 511 is provided in the area of the outer rear hub carrier plate 510 corresponding to the first mounting position 420, and a second mounting hole 512 is provided in the area corresponding to the second mounting position 430. The retractor 110 of the third-row seat belt is mounted on the first mounting position 420 through the first mounting hole 511, and the retractor 190 of the second-row seat belt is mounted on the second mounting position 430 through the second mounting hole 512.

[0046] In some embodiments, as Figure 6As shown, the retractor mounting structure assembly further includes a front reinforcement plate 610 of the inner rear wheelhouse and a rear reinforcement plate 620 of the inner rear wheelhouse. The front reinforcement plate 610 of the inner rear wheelhouse forms a rear end flange 611 in the vehicle rear direction, and the rear reinforcement plate 620 of the inner rear wheelhouse forms a front end flange 621 in the vehicle front direction. The rear hub package welding assembly 500 is welded to the rear end flange 611 and the front end flange 621 respectively. Specific welding methods include but are not limited to resistance welding.

[0047] In some embodiments, as Figure 6 shown, the retractor mounting structure assembly further includes a rear shock absorber mounting bracket 630, a lower reinforcement plate 640 of the rear section of the side wall, and a C-pillar reinforcement plate 650. The retractor mounting bracket 400, the front reinforcement plate 610 of the inner rear wheelhouse, the rear reinforcement plate 620 of the inner rear wheelhouse, the rear shock absorber mounting bracket 630, the lower reinforcement plate 640 of the rear section of the side wall, and the C-pillar reinforcement plate 650 overlap each other to form a mesh structure. The stable mesh structure is more conducive to the dispersion and transmission of force, with strong reliability, enabling the instantaneous impact force loaded on the seat belt when the vehicle collides or makes an emergency stop to be effectively dispersed and transmitted through the surrounding reinforcement beams, avoiding the surrounding parts from being pulled off or cracked, resulting in the failure of the seat belt's protective function, ensuring the safety of the passengers in the vehicle and the integrity of the vehicle structure, and improving the service performance of the seat belt retractor 110.

[0048] In some embodiments, as Figure 5 shown, a raised reinforcement boss 440 is formed on the plate body 410 of the retractor mounting bracket 400. The reinforcement boss 440 and the outer plate 510 of the rear hub package enclose a cavity with a closed cross-section. The reinforcement boss 440 extends from the first mounting position 420 or the second mounting position 430 to the cut edge of the plate body 410. In this way, a complete ring is formed between the reinforcement boss 440 and the outer plate 510 of the rear hub package, that is, the cross-section is closed. By this means, the stiffness of the parts of this system can be improved, thereby enhancing the service performance of the seat belt retractor 110. Preferably, the extending direction of the reinforcement boss 440 is in the same direction as the mounting axis 800 of the retractor 110. The structures and connection relationships not mentioned in the retractor mounting structure assembly are applicable to the prior art. For the disadvantages of the specific setting position of the first mounting position in the retractor mounting structure assembly in the vehicle, refer to the foregoing embodiments, and details are not described herein again.

[0049] The retractor mounting bracket 400 is welded to the inner rear wheelhouse package assembly and forms a mesh structure by connecting with the beam system structure on the rear hub package, which can better effectively transmit force and improve the strength and stiffness of the retractor 110. The retractor mounting bracket 400 simultaneously provides mounting points for the seat belt retractors in the second row and the third row of the vehicle, reducing the number of vehicle parts, lowering the manufacturing process, and improving the body accuracy and vehicle lightweight level.

[0050] The embodiment of the present application also provides a vehicle, which includes the retractor mounting structure assembly disclosed in the embodiment of the present application. The vehicle in this embodiment may further include other necessary components or structures such as tires, transmission mechanisms, engines, control systems, etc., and the corresponding arrangement positions and connection relationships can all refer to those in existing vehicles. The connection relationships, operations, and working principles of the structures not described above are known to those of ordinary skill in the art and will not be described in detail herein.

[0051] The vehicle in the embodiment of the present application is preferably a seven-seat vehicle, and its seat layout can be in the 2+3+2 mode. However, it can be understood that the vehicle in the embodiment of the present application can also be any vehicle with mobility, including but not limited to vehicles with autonomous driving or intelligent driving, such as passenger-carrying vehicles, cargo-carrying vehicles, vehicles for entertainment, rescue vehicles, etc.

[0052] It should be noted that the phrases "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes such specific features, structures, or characteristics. Moreover, such phrases do not necessarily refer to the same embodiment. In addition, when combining specific features, structures, or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures, or characteristics in combination with other embodiments, whether explicitly or implicitly described.

[0053] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article, or device including the said element.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for arranging a third-row seatbelt, the seatbelt comprising a retractor (110), a webbing (120), a loop (130), a tongue (140) and a buckle (150), one end of the webbing (120) being located within the retractor (110), and the other end of the webbing (120) being fixedly connected to a floor assembly (700) of a vehicle, characterized in that, The described arrangement method includes the following steps: Taking the installation point of the lifting ring (130) as the upper end fixing point (160) of the safety belt, and taking the connection point of the webbing (120) and the floor assembly (700) as the first lower end fixing point (170) of the safety belt; Arranging an anthropomorphic dummy (300) on the vehicle seat (200), determining the neck limit point (310) and shoulder limit point (320) of the dummy (300), taking the center point of the locking hole of the buckle (150) as the second lower end fixing point (180) of the safety belt, extending the connection line between the second lower end fixing point (180) and the upper end fixing point (160) of the safety belt in the Y-plane, and extending the intersection line formed by the extension plane and the dummy (300) by a preset distance on both sides to obtain the webbing (120) area. Adjust the positions of the second lower end fixing point (180) and the upper end fixing point (160) of the safety belt within their respective regulatory areas so that the obtained webbing (120) area is between the neck limit point (310) and the shoulder limit point (320), and determine the arrangement position of the buckle (150) and the arrangement position of the lifting ring (130); Determine the arrangement position of the retractor (110) according to the webbing outlet direction of the retractor (110) and the position of the upper end fixing point (160) of the safety belt.

2. The arrangement method of the third row seat belt according to claim 1, characterized in that, The Y-direction distance between the upper end fixing point (160) of the safety belt and the center point of the seat (200) is not less than 140 mm.

3. The arrangement method of the third row seat belt according to claim 1, characterized in that, The Y-direction spacing between the first lower end fixing point (170) of the safety belt and the seat R point (210) of the third row is not less than 120 mm.

4. The arrangement method of the third row seat belt according to claim 1, characterized in that, The preset distance is one-half of the width of the webbing (120).

5. A retractor mounting structure assembly, characterized in that, It includes a retractor mounting bracket (400) and a rear wheel hub cover welding assembly (500). The rear wheel hub cover welding assembly (500) includes an outer rear wheel hub cover (510) and an inner rear wheel hub cover (520). The retractor mounting bracket (400) is welded to the outer rear wheel hub cover (510) and the inner rear wheel hub cover (520) respectively. The retractor mounting bracket (400) includes a plate body (410). A first mounting position (420) and a second mounting position (430) are provided on the plate body (410). The first mounting position (420) is used to mount the retractor (110) of the third row safety belt, and the second mounting position (430) is used to mount the retractor (190) of the second row safety belt; the setting position of the first mounting position (420) is determined by the arrangement method of the third row safety belt according to any one of claims 1-4.

6. The retractor mounting structure assembly according to claim 5, wherein The outer rear wheel hub cover (510) is provided with a first mounting hole (511) in the area corresponding to the first mounting position (420) and a second mounting hole (512) in the area corresponding to the second mounting position (430).

7. The retractor mounting structure assembly according to claim 5, characterized in that, It further includes a front reinforcement plate (610) of the inner rear wheel housing and a rear reinforcement plate (620) of the inner rear wheel housing. The front reinforcement plate (610) of the inner rear wheel housing is formed with a rear end flange (611) in the vehicle rear direction, and the rear reinforcement plate (620) of the inner rear wheel housing is formed with a front end flange (621) in the vehicle front direction. The rear hub carrier welding assembly (500) is welded to the rear end flange (611) and the front end flange (621) respectively.

8. The retractor mounting structure assembly according to claim 7, wherein, It further includes a rear shock absorber mounting bracket (630), a lower reinforcement plate (640) of the rear section of the side panel, and a C-pillar reinforcement plate (650). The retractor mounting bracket (400), the front reinforcement plate (610) of the inner rear wheel housing, the rear reinforcement plate (620) of the inner rear wheel housing, the rear shock absorber mounting bracket (630), the lower reinforcement plate (640) of the rear section of the side panel, and the C-pillar reinforcement plate (650) overlap each other to form a reticular structure.

9. The retractor mounting structure assembly according to claim 5, characterized in that, The retractor mounting bracket (400) is formed with a raised reinforcing boss (440), and the reinforcing boss (440) and the outer plate (510) of the rear hub carrier enclose a cavity with a closed cross-section.

10. A vehicle, characterized in that, It includes a retractor mounting structure assembly according to any one of claims 5-9.

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