Retractor mounting bracket and automobile

By designing a retractor mounting bracket with multiple frames and multiple welded surfaces, the problem of welding joint tearing in the existing technology is solved, the installation fixing strength is improved, and the safety of the rear occupants and the comfort of the occupants are ensured.

CN222808054UActive Publication Date: 2025-04-29ZHEJIANG LEAPMOTOR TECH CO LTD
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Patent Information

Application Number
CN202421725737.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-19
Publication Date
2025-04-29
Estimated Expiration
2034-07-19

AI Technical Summary

Technical Problem

The existing retractor mounting brackets have a risk of welding joint tearing in tensile tests and CAE simulation analysis, resulting in loosening of the retractor, affecting the safety of the rear occupants and the comfort of the occupants.

Method used

A retractor mounting bracket is designed, which ensures that it is welded to the inner and outer plates of the wheel cover at various positions through multiple bent frames and multiple welding surfaces, dispersing tension and reducing the possibility of separation of the welding surface.

Benefits of technology

By increasing the welded surface and the bent frame body, the installation and fixing strength of the installation bracket is improved, the risk of welding surface separation is reduced, and the safety of rear occupants and occupants’ comfort is ensured.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of automobiles, in particular to a retractor mounting bracket and an automobile. A retractor mounting support is mounted on a wheel cover inner plate and a wheel cover outer plate and used for mounting a safety belt retractor. The retractor mounting bracket comprises a first bracket body, and a first welding part and a second welding part are arranged on the first bracket body and used for being connected with the wheel cover inner plate; the second frame body is connected with the first frame body and is bent relative to the first frame body; the second frame body is provided with a third welding part and a fourth welding part, and the third welding part and the fourth welding part are used for being connected with the wheel cover inner plate; the third frame body is connected with the second frame body and is bent relative to the second frame body; a fifth welding part is arranged on the third frame body and used for being connected with the wheel cover outer plate. The utility model provides the retractor mounting bracket capable of effectively guaranteeing the mounting and fixing strength.
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Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a retractor mounting bracket and an automobile. Background Art

[0002] The rear seat belt retractor is usually connected to the vehicle body through the retractor mounting bracket. However, the existing retractor mounting bracket has insufficient mounting point strength. There is a risk of welding point tearing during the tensile test, CAE simulation analysis and other testing processes, which may cause welding point failure, resulting in the retractor loosening and affecting the safety of rear passengers. NTF performance is insufficient, and road noise affects passenger comfort. Utility Model Content

[0003] Based on this, it is necessary to provide a retractor mounting bracket and a vehicle that can effectively ensure the installation and fixing strength.

[0004] A retractor mounting bracket is mounted on a wheel house inner plate and a wheel house outer plate and is used to mount a seat belt retractor; the retractor mounting bracket comprises:

[0005] A first frame, wherein the first frame is provided with a first welding portion and a second welding portion for connecting with the wheel house inner plate;

[0006] A second frame body is connected to the first frame body and is bent relative to the first frame body; a third welding portion and a fourth welding portion are provided on the second frame body, and the third welding portion and the fourth welding portion are used to be connected to the inner plate of the wheel housing;

[0007] The third frame is connected to the second frame and bent relative to the second frame; a fifth welding portion is provided on the third frame for connecting to the wheel cover outer panel.

[0008] In one of the embodiments, a reinforcing protrusion is provided on the second frame, and the reinforcing protrusion protrudes from the second frame to a side away from the wheel arch inner panel.

[0009] In one of the embodiments, an opening is provided on the reinforcing protrusion, and the opening penetrates the reinforcing protrusion along the thickness direction of the reinforcing protrusion.

[0010] In one embodiment, the reinforcing protrusion is disposed between the third welding portion and the fourth welding portion, and extends along the length direction of the second frame.

[0011] In one embodiment, a sixth welding portion is disposed on the second frame near the fourth welding portion, and the sixth welding portion is bent relative to the second frame.

[0012] In one embodiment, a first bending body and a second bending body are respectively disposed at edges of opposite sides of the first frame, the first welding portion is disposed on the first bending body, and the second welding portion is disposed on the second bending body.

[0013] In one embodiment, a first reinforcing rib is disposed on the first frame at a position close to the second bending body, and a second reinforcing rib is disposed on the first frame at a position away from the second frame.

[0014] In one embodiment, the wheel arch inner plate is provided with a first inner plate weld, a second inner plate weld, a third inner plate weld, a fourth inner plate weld, and a fifth inner plate weld; the first inner plate weld is welded and fixedly connected to the first welding portion; the second inner plate weld is welded and fixedly connected to the second welding portion; the third inner plate weld is welded and fixedly connected to the third welding portion; the fourth inner plate weld is welded and fixedly connected to the fourth welding portion; the fifth inner plate weld is welded and fixedly connected to the sixth welding portion.

[0015] In one of the embodiments, the wheel arch inner panel is provided with a reinforcing rib corresponding to the reinforcing protrusion, and the reinforcing rib protrudes to a position away from the reinforcing protrusion.

[0016] In one of the embodiments, a first outer panel welding portion is provided on the outer panel of the wheel arch, and the first outer panel welding portion is welded and fixedly connected to the fifth welding portion.

[0017] In one embodiment, the wheel arch outer panel includes a C-pillar inner panel, a C-pillar partition, and a C-pillar upper beam reinforcement plate. The C-pillar inner panel and the C-pillar upper beam reinforcement plate are arranged to form a C-pillar cavity. The C-pillar partition is arranged in the C-pillar cavity, and the two ends of the C-pillar partition are respectively connected to the C-pillar inner panel and the C-pillar upper beam reinforcement plate.

[0018] In one embodiment, the first outer panel weld is disposed on the C-pillar inner panel; a beam-plate weld is disposed on the C-pillar upper beam reinforcement plate; a first partition weld and a second partition weld are respectively disposed at both ends of the C-pillar partition, the first partition weld is welded and fixedly connected to the first outer panel weld, and the second partition weld is welded and fixedly connected to the beam-plate weld.

[0019] In one of the embodiments, the C-pillar upper beam reinforcement plate is provided with a through-welding hole near the beam-plate welding portion, and the through-welding hole is communicated with the C-pillar cavity.

[0020] The present application also provides an automobile, comprising a wheel house inner panel, a wheel house outer panel and a retractor mounting bracket as described in any one of the above embodiments.

[0021] Compared with the prior art, the retractor mounting bracket is provided with a plurality of frames that are bent to each other, and a plurality of welding surfaces are respectively provided on the frames, so that the retractor mounting bracket can be welded to the inner plate and the outer plate of the wheel house at various positions and various horizontal planes. When the tension acts on the retractor mounting bracket, the plurality of welding surfaces can disperse the force, reduce the possibility of the welding surface and the inner plate or the outer plate of the wheel house separating, improve the installation and fixing strength of the mounting bracket, and ensure the safety of the rear passengers. It improves the insufficient NTF performance and ensures the comfort of the passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic structural diagram of the retractor mounting bracket provided in this application being connected in coordination with the wheel house inner panel and the wheel house outer panel.

[0024] Figure 2 This is a schematic diagram of the structure of the retractor mounting bracket provided in this application.

[0025] Figure 3 This is a schematic diagram of the structure in which the retractor mounting bracket provided in this application is connected with the inner panel of the wheel arch.

[0026] Figure 4 for Figure 3 Sectional view along line AA.

[0027] Figure 5 for Figure 3 Sectional view along line BB.

[0028] Figure 6 for Figure 1 The structure of Figure 2 .

[0029] Figure 7 for Figure 6 Cross-sectional view along line CC.

[0030] Reference numerals: 100, retractor mounting bracket; 10, first frame; 11, first welding portion; 12, second welding portion; 13, first bending body; 14, second bending body; 16, first reinforcing rib; 15, second reinforcing rib; 20, second frame; 21, third welding portion; 22, fourth welding portion; 23, reinforcing convex portion; 24, opening; 25, sixth welding portion; 30, third frame; 31, fifth welding portion; 200, wheel house inner panel; 201 , first inner panel weld; 202, second inner panel weld; 203, third inner panel weld; 204, fourth inner panel weld; 205, fifth inner panel weld; 206, reinforcement rib; 300, wheel house outer panel; 301, C-pillar inner panel; 302, C-pillar bulkhead; 303, C-pillar upper beam reinforcement plate; 304, C-pillar cavity; 305, first outer panel weld; 306, first bulkhead weld; 307, second bulkhead weld; 308, beam-plate weld; 309, through-weld hole. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0036] See also Figures 1 to 7 The present application provides a car, including a wheel house inner panel 200 , a wheel house outer panel 300 and a retractor mounting bracket 100 .

[0037] like Figure 2-7 As shown, the retractor mounting bracket 100 is mounted on the wheel house inner plate 200 and the wheel house outer plate 300, and is used to install the seat belt retractor. The retractor mounting bracket 100 includes a first frame 10, a second frame 20, and a third frame 30. Among them, the first frame 10 is used to connect with the wheel house inner plate 200, the second frame 20 is used to connect with the wheel house inner plate 200, and the third frame 30 is used to connect with the wheel house outer plate 300.

[0038] Specifically, the first frame 10 is provided with a first welding portion 11 and a second welding portion 12, and is connected to the wheel house inner panel 200 through the first welding portion 11 and the second welding portion 12. The second frame 20 is connected to the first frame 10 and is bent relative to the first frame 10. The second frame 20 is provided with a third welding portion 21 and a fourth welding portion 22, and is connected to the wheel house inner panel 200 through the third welding portion 21 and the fourth welding portion 22. The third frame 30 is connected to the second frame 20 and is bent relative to the second frame 20. The third frame 30 is provided with a fifth welding portion 31, and is connected to the wheel house outer panel 300 through the fifth welding portion 31.

[0039] It can be understood that multiple welding surfaces can disperse the received force, reduce the possibility of separation between the welding surface and the wheel house inner panel 200 or the wheel house outer panel 300, and enhance the installation and fixing strength of the mounting bracket.

[0040] Furthermore, a reinforcing protrusion 23 is provided on the second frame 20 , and the reinforcing protrusion 23 protrudes from the second frame 20 to a side away from the wheel house inner panel 200 .

[0041] It can be understood that when the second frame 20 is connected to the wheel house inner panel 200, the reinforcing protrusion 23 will be surrounded by the wheel house inner panel 200 to form a cavity, thereby increasing the rigidity of the panel and improving its firmness.

[0042] Optionally, an opening 24 is provided on the reinforcing protrusion 23, and the opening 24 penetrates the reinforcing protrusion 23 along the thickness direction of the reinforcing protrusion 23. That is, the opening 24 is connected to the cavity formed by the reinforcing protrusion 23 and the wheel house inner plate 200. During electrophoresis, the electrophoresis liquid can enter the cavity through the opening 24 to avoid poor electrophoresis in the cavity. The size and position of the opening 24 can be selected according to actual needs, and will not be described in detail here.

[0043] In this embodiment, the reinforcing protrusion 23 is disposed between the third welding portion 21 and the fourth welding portion 22 , that is, the reinforcing protrusion 23 is disposed at a position corresponding to the position between the third welding portion 21 and the fourth welding portion 22 .

[0044] Preferably, the reinforcing protrusion 23 extends along the length direction of the second frame body 20 and can be configured as a long strip of reinforcing ribs 206 , and the length of which is configured to be equal to the length of the second frame body 20 , so as to enhance the overall strength of the second frame body 20 .

[0045] Of course, the present invention is not limited thereto. In other embodiments, the reinforcing protrusion 23 may also be configured to extend along the width direction of the second frame body 20 , and the length may also be selected according to actual needs.

[0046] Preferably, the third welding portion 21 and the fourth welding portion 22 also extend along the length direction of the first frame 10 and are equal to the length of the second frame 20. That is, the second frame 20 is sequentially provided with the third welding portion 21, the reinforcing convex portion 23, and the fourth welding portion 22 in the width direction, thereby ensuring the structural strength while ensuring the welding area.

[0047] Furthermore, a sixth welding portion 25 is disposed on the second frame 20 near the fourth welding portion 22 , and the sixth welding portion 25 is bent relative to the second frame 20 .

[0048] Preferably, two sixth welding portions 25 are provided and distributed along the length direction of the second frame 20. The two sixth welding portions 25 are both located on the same side of the second frame 20 and are connected to the fourth welding portions 22.

[0049] Furthermore, the first frame 10 is provided with a first bending body 13 and a second bending body 14, which are respectively arranged on both sides of the width direction of the first frame 10 and connected to the edge of the first frame 10. The first bending body 13 and the second bending body 14 are both bent relative to the first frame 10.

[0050] Furthermore, the first welding portion 11 is disposed on the first bending body 13, and the second welding portion 12 is disposed on the second bending body 14. The welding surfaces are ensured to be on different planes, thereby improving the fixing strength.

[0051] Furthermore, the first frame 10 is provided with a first reinforcing rib 16, and the first reinforcing rib 16 is arranged near the second bending body 14. The first reinforcing rib 16 extends along the length direction of the first frame 10 to improve the strength of the first frame 10 in the length direction.

[0052] Optionally, the first frame 10 is provided with a second reinforcing rib 15, and the second reinforcing rib 15 is arranged at a position away from the second frame 20. The second reinforcing rib 15 extends along the width direction of the first frame 10 to improve the strength of the first frame 10 in the width direction.

[0053] It can be understood that when the retractor is installed on the mounting bracket, the second reinforcing ribs 15 can play an interference role to avoid a gap between the retractor and the first frame body 10, thereby enhancing the stability of the retractor installation.

[0054] like Figure 4 , Figure 5 As shown, the wheel house inner plate 200 is provided with a first inner plate welding portion 201, a second inner plate welding portion 202, a third inner plate welding portion 203, a fourth inner plate welding portion 204, and a fifth inner plate welding portion 205. The positions of the first inner plate welding portion 201, the second inner plate welding portion 202, the third inner plate welding portion 203, the fourth inner plate welding portion 204, and the fifth inner plate welding portion 205 respectively correspond to the positions of the first welding portion 11, the second welding portion 12, the third welding portion 21, the fourth welding portion 22, and the sixth welding portion 25. The connection between the retractor mounting bracket 100 and the wheel house inner plate 200 is achieved by welding and fixing these welding portions.

[0055] It can be understood that the first inner plate weld 201 is welded and fixedly connected to the first weld 11; the second inner plate weld 202 is welded and fixedly connected to the second weld 12; the third inner plate weld 203 is welded and fixedly connected to the third weld 21; the fourth inner plate weld 204 is welded and fixedly connected to the fourth weld 22; and the fifth inner plate weld 205 is welded and fixedly connected to the sixth weld 25.

[0056] In this embodiment, the welding connection is connected by solder, and a welding spot is formed at the welding position, and the welding is strong. Of course, it is not limited to this, and the welding connection can also be connected by other methods such as laser welding, spot welding, etc.

[0057] Furthermore, a reinforcing rib 206 is provided on the wheel house inner panel 200 corresponding to the reinforcing convex portion 23. The reinforcing rib 206 is provided protruding from the wheel house inner panel 200 to a position away from the reinforcing convex portion 23. The protruding reinforcing rib 206 can increase the size of the cavity formed by the reinforcing convex portion 23, further improving the rigidity of the panel.

[0058] like Figure 7 As shown, the wheel house outer panel 300 includes a C-pillar inner panel 301, a C-pillar partition 302, and a C-pillar upper beam reinforcement plate 303, and the C-pillar inner panel 301 is connected to the C-pillar upper beam reinforcement plate 303. A C-pillar cavity 304 is formed between the C-pillar inner panel 301 and the C-pillar upper beam reinforcement plate 303. The C-pillar partition 302 is arranged in the C-pillar cavity 304, and the two ends of the C-pillar partition 302 are respectively connected to the C-pillar inner panel 301 and the C-pillar upper beam reinforcement plate 303.

[0059] Furthermore, a first outer panel welding portion 305 is provided on the wheel house outer panel 300 , and the first outer panel welding portion 305 is welded and fixedly connected to the fifth welding portion 31 .

[0060] Furthermore, a first bulkhead weld 306 and a second bulkhead weld 307 are respectively provided at both ends of the C-pillar bulkhead 302 . The first bulkhead weld 306 is connected to the C-pillar inner plate 301 , and the second bulkhead weld 307 is connected to the C-pillar upper beam reinforcement plate 303 .

[0061] Optionally, a beam plate weld 308 is provided on the C-pillar upper beam reinforcement plate 303, and the first outer plate weld 305 is provided on the C-pillar inner plate 301. The first bulkhead weld 306 is welded and fixedly connected to the first outer plate weld 305, and the second bulkhead weld 307 is welded and fixedly connected to the beam plate weld 308.

[0062] It can be understood that the connection between the C-pillar bulkhead 302 and the C-pillar inner panel 301 and the connection between the C-pillar inner panel 301 and the mounting bracket are both located at the first outer panel welding portion 305 , where the welding is more solid and the panel rigidity is also stronger.

[0063] Preferably, the C-pillar upper beam reinforcement plate 303 is provided with a through-welding hole 309 near the beam plate welding portion 308 , and the through-welding hole 309 is connected to the C-pillar cavity 304 , so as to facilitate the electrophoresis and welding operations inside the C-pillar cavity 304 .

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A retractor mounting bracket, mounted on a wheel house inner plate (200) and a wheel house outer plate (300), for mounting a seat belt retractor; characterized in that: The retractor mounting bracket (100) comprises: A first frame (10), wherein the first frame (10) is provided with a first welding portion (11) and a second welding portion (12) for connecting to the wheel house inner plate (200); A second frame (20) is connected to the first frame (10) and is bent relative to the first frame (10); a third welding portion (21) and a fourth welding portion (22) are provided on the second frame (20), and the third welding portion (21) and the fourth welding portion (22) are used to be connected to the wheel house inner plate (200); The third frame (30) is connected to the second frame (20) and is bent relative to the second frame (20); a fifth welding portion (31) is provided on the third frame (30) for connecting to the wheel arch outer panel (300).

2. The retractor mounting bracket according to claim 1, characterized in that: The second frame (20) is provided with a reinforcing protrusion (23), and the reinforcing protrusion (23) protrudes from the second frame (20) to a side away from the wheel house inner plate (200).

3. The retractor mounting bracket according to claim 2, characterized in that: The reinforcing convex portion (23) is provided with an opening (24), and the opening (24) penetrates the reinforcing convex portion (23) along the thickness direction of the reinforcing convex portion (23).

4. The retractor mounting bracket according to claim 2, characterized in that: The reinforcing protrusion (23) is arranged between the third welding portion (21) and the fourth welding portion (22), and extends along the length direction of the second frame (20).

5. The retractor mounting bracket according to claim 4, characterized in that: The second frame (20) is provided with a sixth welding portion (25) near the fourth welding portion (22), and the sixth welding portion (25) is bent relative to the second frame (20).

6. The retractor mounting bracket according to claim 1, characterized in that: A first bending body (13) and a second bending body (14) are respectively provided at the edges of opposite sides of the first frame (10); the first welding portion (11) is provided on the first bending body (13); and the second welding portion (12) is provided on the second bending body (14).

7. The retractor mounting bracket according to claim 6, characterized in that: A first reinforcing rib (16) is provided on the first frame (10) at a position close to the second bending body (14), and a second reinforcing rib (15) is provided on the first frame (10) at a position away from the second frame (20).

8. The retractor mounting bracket according to claim 5, characterized in that: The wheel arch inner panel (200) is provided with a first inner panel weld (201), a second inner panel weld (202), a third inner panel weld (203), a fourth inner panel weld (204), and a fifth inner panel weld (205); the first inner panel weld (201) is welded and fixedly connected to the first welding portion (11); the second inner panel weld (202) is welded and fixedly connected to the second welding portion (12); the third inner panel weld (203) is welded and fixedly connected to the third welding portion (21); the fourth inner panel weld (204) is welded and fixedly connected to the fourth welding portion (22); the fifth inner panel weld (205) is welded and fixedly connected to the sixth welding portion (25).

9. The retractor mounting bracket according to claim 2, characterized in that: The wheel house inner plate (200) is provided with a reinforcing rib (206) corresponding to the reinforcing protrusion (23), and the reinforcing rib (206) protrudes to a position away from the reinforcing protrusion (23).

10. The retractor mounting bracket according to claim 1, characterized in that: The wheel house outer plate (300) is provided with a first outer plate welding portion (305), and the first outer plate welding portion (305) is welded and fixedly connected to the fifth welding portion (31).

11. The retractor mounting bracket according to claim 10, characterized in that: The wheel house outer panel (300) comprises a C-pillar inner panel (301), a C-pillar partition (302), and a C-pillar upper beam reinforcement plate (303); the C-pillar inner panel (301) and the C-pillar upper beam reinforcement plate (303) are arranged to form a C-pillar cavity (304); the C-pillar partition (302) is arranged in the C-pillar cavity (304), and the two ends of the C-pillar partition (302) are respectively connected to the C-pillar inner panel (301) and the C-pillar upper beam reinforcement plate (303).

12. The retractor mounting bracket according to claim 11, characterized in that: The first outer plate welding portion (305) is arranged on the C-pillar inner plate (301); the C-pillar upper beam reinforcement plate (303) is provided with a beam plate welding portion (308); the two ends of the C-pillar bulkhead (302) are respectively provided with a first bulkhead welding portion (306) and a second bulkhead welding portion (307), the first bulkhead welding portion (306) is welded and fixedly connected to the first outer plate welding portion (305), and the second bulkhead welding portion (307) is welded and fixedly connected to the beam plate welding portion (308).

13. The retractor mounting bracket according to claim 12, characterized in that: The C-pillar upper beam reinforcement plate (303) is provided with a through-welding hole (309) near the beam plate welding portion (308), and the through-welding hole (309) is connected to the C-pillar cavity (304).

14. A car, characterized in that: It comprises a wheel housing inner plate (200), a wheel housing outer plate (300) and a retractor mounting bracket (100) as claimed in any one of claims 1 to 13.