A back door lock reinforcement, a back door, and a vehicle

Abstract

The application relates to the technical field of vehicles, and particularly provides a back door lock reinforcing piece, a back door and a vehicle. The back door lock reinforcing piece comprises a main body part, a first folding part connected to the rear side of the main body part and bent downward, and a supporting leg part connected to the rear side of the first folding part and located at the left and right ends of the first folding part, wherein the supporting leg part extends downward, and the end of the supporting leg part away from the first folding part is provided with an inner plate connecting part. In the application, the two supporting leg parts extend downward and connect the back door inner plate through the inner plate connecting part, the first folding part and the two supporting leg parts form a supporting structure along the up-down direction, the size of the supporting leg part in the extension direction is smaller, the stress transmission path is effectively shortened, the deformation risk is reduced, the fixed support of the supporting leg part and the back door inner plate can resist the external force action of a coating hanger in a coating process, the fixed support of the supporting leg part and the back door inner plate can resist the collision force when the vehicle is subjected to a rear collision, the rigidity of the main body part is improved, and the possibility of deformation or tearing of the back door lock connecting hole is reduced as much as possible.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a rear door lock reinforcement, a rear door, and a vehicle. Background Technology

[0002] In existing vehicles, the inner panel of the tailgate typically features a tailgate lock reinforcement at the location of the tailgate lock to improve the structural strength of that area. The tailgate lock reinforcement includes a main body, a first bent edge, and a second bent edge. The main body has a tailgate lock connection hole. One end of the main body has the first bent edge, and the other end has the second bent edge. The first bent edge bends upwards, and the second bent edge bends downwards. Support feet are located on both sides of the outer end of the second bent edge, with the outer ends of the support feet resting on the outer panel.

[0003] However, because the support foot is suspended between the second bend and the outer panel in the front-to-back direction, the support foot is larger in the extension direction. The support foot is prone to deformation under stress, which limits the reinforcement effect of the support foot on the stiffness of the tailgate lock connection hole. During painting, the tailgate lock connection hole becomes the mounting hole for the painting fixture. The painting fixture will exert a rearward force on the tailgate lock connection hole, which may deform under stress. This may cause the tailgate lock position to shift during final assembly, resulting in the tailgate being unable to close. In the event of a rear-end collision, the tailgate lock connection hole may also tear under the impact force. Utility Model Content

[0004] The purpose of this application is to provide a rear door lock reinforcement, a rear door, and a vehicle, so as to minimize the possibility that the rear door cannot be closed and to minimize the possibility of tearing caused by a rear impact to the rear door lock connection hole.

[0005] To solve the above-mentioned technical problems, this application provides a door lock reinforcement member, comprising:

[0006] Main body;

[0007] The first folding section is connected to the rear side of the main body and bends downward;

[0008] The support leg is connected to the rear side of the first folding part and located at the left and right ends of the first folding part. The support leg extends downward and has an inner panel connecting part for connecting the inner panel of the back door at the end away from the first folding part.

[0009] In this application's rear door lock reinforcement, the support legs are connected to the rear side of the first folding part and located at both ends of the first folding part. The support legs extend downward and can be connected to the inner panel of the rear door through the inner panel connecting part. Compared with the original support feet that are suspended between the second bending edge and the outer panel in the front-rear direction, the two support legs in this application are rigidly fixed to the inner panel of the rear door through the inner panel connecting part. The first folding part and the two support legs form a support structure in the vertical direction. The dimensions of the support legs in the extension direction are smaller, effectively shortening the force transmission path and reducing the deformation risk of the support legs. During the painting process, the fixed support of the support legs and the inner panel of the rear door can resist the external force of the painting fixture, improve the rigidity of the main body, prevent the deformation of the rear door lock connecting hole in the main body as much as possible, ensure the installation position accuracy of the rear door lock during final assembly as much as possible, and reduce the possibility of the rear door not being able to close. When the vehicle is involved in a rear-end collision, the fixed support of the support legs and the inner panel of the rear door can also resist the collision force, improve the rigidity of the main body, and reduce the possibility of tearing of the rear door lock connecting hole in the main body.

[0010] Optionally, the rear door lock reinforcement further includes:

[0011] The reinforcing ribs are provided at least in part in the support leg portion.

[0012] Optionally, the left and right ends of the main body are provided with a first connecting recessed platform, the reinforcing rib extends along the extension direction of the support leg, the upper end of the reinforcing rib extends to the rear end contour of the first connecting platform, and the lower end of the reinforcing rib extends to the front end contour of the inner plate connecting part.

[0013] Optionally, the main body has a downwardly recessed portion in the middle, and the bottom wall of the recessed portion is provided with a back door lock connection hole.

[0014] Optionally, the main body is provided with a rear door lock through hole, and the rear door lock reinforcement further includes:

[0015] The first electrophoresis passes through the boss, the front end of the first electrophoresis extends to the rear end profile that forms the back door lock through hole, and the rear end of the first electrophoresis extends to the rear edge of the first folding part.

[0016] Optionally, the rear door lock reinforcement further includes:

[0017] The second folding part is connected to the front side of the main body and bends upward. Positioning holes are provided at the left and right ends of the second folding part, one of which is a strip-shaped hole extending in the left and right direction, and the other is a round hole.

[0018] Optionally, the second folding portion is provided with a plurality of forward-recessed second connecting platforms at intervals along the left and right direction, and a rearward-protruding second electrophoresis passing boss is provided between two adjacent second connecting platforms.

[0019] Optionally, the thickness of the back door lock reinforcement is in the range of 1.5mm-2mm.

[0020] Optionally, the material of the rear door lock reinforcement includes high-strength steel.

[0021] This application also provides a back door, including:

[0022] Back door inner panel;

[0023] And the aforementioned rear door lock reinforcement, wherein the rear door lock reinforcement is connected to the rear door inner panel, and the inner panel connecting part is connected to the rear door inner panel.

[0024] The back door of this application includes the aforementioned back door lock reinforcement, and therefore has the same technical effect as the aforementioned back door lock reinforcement, which will not be repeated here.

[0025] Optionally, the main body is provided with a rear door lock connection hole, and the main body and the rear door inner panel are welded and fixed around each rear door lock connection hole by at least four welding points.

[0026] This application also provides a vehicle including the aforementioned tailgate.

[0027] The vehicle in this application includes the aforementioned tailgate, and therefore has the same technical effect as the aforementioned tailgate, which will not be repeated here. Attached Figure Description

[0028] Figure 1 A schematic diagram of a specific embodiment of the back door lock reinforcement provided in this application;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure of the rear door lock reinforcement connecting to the inner panel of the rear door;

[0030] Figure 3 This is a cross-sectional view along the front-to-back direction of a specific embodiment of the back door provided in this application.

[0031] in, Figures 1-3 The accompanying figure labels are as follows:

[0032] 1- Rear door lock reinforcement; 11- Main body; 111- Recessed portion; 11a- Rear door lock connecting hole; 11b- Rear door lock through hole; 12- First folding portion; 13- Support leg portion; 131- Inner panel connecting portion; 14- Reinforcing rib; 15- Second folding portion; 15a- Positioning hole; 16A- First electrophoresis passing boss; 16B- Second electrophoresis passing boss; 17A- First connecting recessed platform; 17B- Second connecting recessed platform;

[0033] 2-Inner panel of the rear door; 21-Connecting plate section;

[0034] 3-Back door outer panel;

[0035] a-Welding point. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] It should be understood that the phrase "some embodiments" throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this article, when the rear door lock reinforcement 1 is applied to a vehicle, the front-to-back direction of the rear door lock reinforcement 1 is the front-to-back direction of the vehicle, the direction closer to the front of the vehicle is "front", and the direction closer to the rear of the vehicle is "rear"; the left-to-right direction of the rear door lock reinforcement 1 is the left-to-right direction of the vehicle, and the up-to-down direction of the rear door lock reinforcement 1 is the up-to-down direction of the vehicle.

[0041] Please refer to Figures 1-3 , Figure 1 A schematic diagram of a specific embodiment of the back door lock reinforcement provided in this application; Figure 2 for Figure 1 A schematic diagram of the structure of the rear door lock reinforcement connecting to the inner panel of the rear door; Figure 3 This is a cross-sectional view along the front-to-back direction of a specific embodiment of the back door provided in this application.

[0042] This embodiment provides a rear door lock reinforcement 1, including:

[0043] Main body 11;

[0044] The first folding part 12 is connected to the rear side of the main body part 11 and bends downward;

[0045] The support leg 13 is connected to the rear side of the first folding part 12 and is located at the left and right ends of the first folding part 12. The support leg 13 extends downward and has an inner panel connecting part 131 for connecting the inner panel 2 of the back door at the end away from the first folding part 12.

[0046] In the rear door lock reinforcement 1 of this application, the support legs 13 are connected to the rear side of the first folding part 12 and located at both ends of the first folding part 12. The support legs 13 extend downward and can be connected to the inner panel 2 of the rear door through the inner panel connecting part 131. Compared with the original support feet that are suspended between the second bent edge and the outer panel in the front-to-back direction, the two support legs 13 in this application are rigidly fixed to the inner panel 2 of the rear door through the inner panel connecting part 131. The first folding part 12 and the two support legs 13 form a support structure in the vertical direction. The support legs 13 are smaller in the extension direction, effectively shortening the force transmission path and reducing the load. The lower support leg 13 reduces the risk of deformation. During the painting process, the fixed support between the support leg 13 and the inner panel 2 of the tailgate can resist the external force of the painting fixture, improve the rigidity of the main body 11, prevent the tailgate lock connection hole 11a located on the main body 11 from deforming as much as possible, ensure the installation position accuracy of the tailgate lock during final assembly, and minimize the possibility that the tailgate cannot be closed. In the event of a rear-end collision, the fixed support between the support leg 13 and the inner panel 2 of the tailgate can also resist the impact force, improve the rigidity of the main body 11, and minimize the possibility that the tailgate lock connection hole 11a located on the main body 11 will tear.

[0047] Specifically, the downward extension of the support leg 13 can be vertical, inclined, or arc-shaped.

[0048] Among them, by Figure 3 As can be seen, the inner panel 2 of the back door has a connecting plate portion 21 for connecting the inner panel connecting portion 131. The extension direction of the inner panel connecting portion 131 is consistent with the extension direction of the connecting plate portion 21, ensuring that the inner panel connecting portion 131 and the connecting plate portion 21 can fit together, increasing the contact area between the inner panel connecting portion 131 and the connecting plate portion 21, improving the connection strength between the inner panel connecting portion 131 and the connecting plate portion 21, and ensuring reliable support.

[0049] At the same time, by Figure 3 It can also be seen that although the inner panel connecting part 131 and the other parts of the support leg part 13 both extend downward, their tilt angles are not the same. The other parts of the support leg part 13, except for the inner panel connecting part 131, have a gap with the inner panel of the back door 2.

[0050] Please continue to refer to this. Figure 1 and Figure 2 In some embodiments of this application, the rear door lock reinforcement 1 further includes:

[0051] The reinforcing rib 14 is provided at least partially in the leg portion 13.

[0052] The above-mentioned reinforcing ribs 14 give the outrigger 13 an uneven cross-sectional structure, which improves the bending and torsional resistance of the outrigger 13 without significantly increasing its weight, and enhances the strength and rigidity of the outrigger 13. This makes the outrigger 13 more robust when subjected to external forces, and further reduces the risk of deformation of the outrigger 13.

[0053] Depend on Figure 1 and Figure 2 As can be seen, the left and right ends of the main body 11 are provided with a first connecting recessed platform 17A that is recessed downwards. The reinforcing rib 14 extends along the extension direction of the support leg 13. The upper end of the reinforcing rib 14 extends to the rear end contour of the first connecting recessed platform 17A, and the lower end of the reinforcing rib 14 extends to the front end contour of the inner plate connecting part 131.

[0054] As configured above, the first connecting countersunk platform 17A can fit snugly against the inner panel 2 of the rear door, facilitating welding operations between the main body 11 and the inner panel 2 of the rear door, and improving the connection reliability between the main body 11 and the inner panel 2 of the rear door; the reinforcing rib 14 extends along the extension direction of the support leg 13, with the upper end of the reinforcing rib 14 extending to the rear end profile of the first connecting countersunk platform 17A, and the lower end of the reinforcing rib 14 extending to the front end profile of the inner panel connecting portion 131, from... Figure 3 It can be seen that the area between the rear profile of the first connecting platform 17A and the front profile of the inner panel connecting part 131 is separated from the inner panel 2 of the back door. The setting of the reinforcing rib 14 can effectively improve the rigidity of this part of the area, effectively resist bending and torsion, and further reduce the deformation risk of the support leg 13.

[0055] Please continue to refer to this. Figures 1-3 In some embodiments of this application, the main body 11 has a recessed portion 111 in the middle, and the bottom wall of the recessed portion 111 is provided with a back door lock connection hole 11a.

[0056] As described above, the main body 11 has a downwardly recessed portion 111 in the middle. The lower surface of the recessed portion 111 can fit against the inner panel 2 of the back door. The inner panel 2 of the back door has a through hole. The back door lock connection hole 11a provided on the bottom wall of the recessed portion 111 can communicate with the through hole provided on the inner panel 2 of the back door for the back door lock connector to pass through. The recessed portion 111, as described above, allows the lower surface of the recessed portion 111 to fit against the inner panel 2 of the back door, facilitating the welding operation between the main body 11 and the inner panel 2 of the back door, and improving the welding efficiency. The welding reliability of the main body 11 and the inner panel 2 of the back door is improved. On the other hand, the setting of the recessed part 111 makes the main body 11 no longer a simple flat structure, but forms an uneven structure similar to a reinforcing rib. This uneven structure can improve the bending and torsional resistance of the main body 11 without increasing the amount of material used, thereby enhancing the strength and rigidity of the overall structure. At the same time, this uneven structure can also reduce the amount of material used and reduce production costs without sacrificing strength and rigidity.

[0057] Depend on Figure 2 It can be seen that the bottom wall of the recessed part 111 is also provided with a back door lock through hole 11b for the back door lock to pass through, and the back door lock connecting hole 11a is provided at the left and right ends of the back door lock through hole 11b.

[0058] Please continue to refer to this. Figures 1-2 In some embodiments of this application, the main body 11 is provided with a rear door lock through hole 11b, and the rear door lock reinforcement 1 further includes:

[0059] The first electrophoresis passes through the boss 16A, and the front end of the first electrophoresis extends to the rear end profile that forms the back door lock through hole 11b. The rear end of the first electrophoresis extends to the rear edge of the first folding part 12.

[0060] The first electrophoretic coating with protrusion 16A helps maintain the uniformity of paint flow during the electrophoretic coating process, improves the uniformity of coating, and enhances the corrosion resistance of the back door. At the same time, the first folding part 12 forms an uneven structure, which helps to improve the bending and torsional resistance of the first folding part 12 without increasing the amount of material used, thereby enhancing the strength and rigidity of the first folding part 12.

[0061] Please continue to refer to this. Figures 1-2 In some embodiments of this application, the left and right ends of the main body 11 are provided with a first connecting platform 17A that is recessed downward.

[0062] As configured above, the first connecting platform 17A can fit snugly against the inner panel 2 of the rear door, facilitating the welding operation between the main body 11 and the inner panel 2 of the rear door, and improving the connection reliability between the main body 11 and the inner panel 2 of the rear door.

[0063] Please continue to refer to this. Figures 1-2In some embodiments of this application, the rear door lock reinforcement 1 further includes:

[0064] The second folding part 15 is connected to the front side of the main body part 11 and is bent upward. Positioning holes 15a are provided at the left and right ends of the second folding part 15. One positioning hole 15a is a strip-shaped hole extending in the left and right direction, and the other positioning hole 15a is a round hole.

[0065] As configured above, the second folding part 15 is connected to the front side of the main body part 11. The upward bending design of the first folding part 12 helps to increase the bending resistance of the back door lock reinforcement 1 and improve the strength and rigidity of the back door lock reinforcement 1. The strip-shaped hole extending in the left and right direction is defined as the first positioning hole, and the round hole is defined as the second positioning hole. The second positioning hole plays a main positioning role, which helps to accurately position the back door lock reinforcement 1 and ensure that the relative position of the back door lock reinforcement 1 and the inner panel 2 of the back door is accurate, thereby improving the assembly quality. The second positioning hole plays an auxiliary positioning role. The strip-shaped hole allows for a certain adjustment of the connection position, reduces the processing difficulty of the back door lock reinforcement 1, and improves the installation flexibility and convenience of the back door lock reinforcement 1.

[0066] Please continue to refer to this. Figures 1-2 In some embodiments of this application, the second folding portion 15 is provided with a plurality of forward-recessed second connecting recesses 17B at intervals along the left and right directions, and there is a rearward-protruding second electrophoresis through protrusion 16B between two adjacent second connecting recesses 17B.

[0067] As configured above, the second connecting recess 17B can fit snugly against the inner panel 2 of the back door, facilitating the welding operation between the second folding part 15 and the inner panel 2 of the back door, and improving the connection reliability between the second folding part 15 and the inner panel 2 of the back door; the upward-protruding second electrophoretic pass-through boss 16B between two adjacent second connecting recesses 17B helps to maintain the uniformity of paint flow during electrophoretic coating, improves the uniformity of coating, and enhances the corrosion resistance of the back door; in addition, the structure of the second connecting recess 17B and the second electrophoretic pass-through boss 16B makes the second folding part 15 form an uneven structure, which helps to improve the bending and torsional resistance of the second folding part 15 without increasing the amount of material used, thereby enhancing the strength and rigidity of the second folding part 15.

[0068] Furthermore, in some embodiments of this application, the thickness of the back door lock reinforcement 1 ranges from 1.5mm to 2mm.

[0069] Verification showed that if the thickness of the tailgate lock reinforcement 1 is less than 1.5mm, it is too thin, lacks strength, and has limited structural reinforcement effect on the tailgate lock location. If the thickness is greater than 2mm, it is too thick, excessively heavy, and too stiff, negatively impacting the vehicle's NVH (Noise, Vibration, Harshness) performance. In the embodiments of the application, the thickness of the rear door lock reinforcement 1 has the above-mentioned range of values. Specifically, the thickness of the rear door lock reinforcement 1 can be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc. The rear door lock reinforcement 1 can more effectively strengthen the structure at the location of the rear door lock, minimize the possibility of deformation or tearing of the rear door lock connection hole 11a, reduce the weight of the rear door lock reinforcement 1, weaken the rigidity of the rear door lock reinforcement 1, and improve the NVH performance of the whole vehicle.

[0070] Furthermore, the material of the rear door lock reinforcement 1 includes, but is not limited to, high-strength steel. High-strength steel is a type of steel with high yield strength and tensile strength. The rear door lock reinforcement 1 is made of high-strength steel, which can reduce the amount of material used while maintaining or improving the structural strength of the rear door lock reinforcement 1, thereby reducing the weight of the rear door lock reinforcement 1, achieving lightweighting, and improving the NVH performance of the whole vehicle.

[0071] Furthermore, in some embodiments of this application, the rear door lock reinforcement 1 is integrally formed using a stamping process. This improves the production efficiency, processing accuracy, strength, and rigidity of the rear door lock reinforcement 1.

[0072] This embodiment also provides a back door, including:

[0073] 2. Inner panel of the rear door;

[0074] And the aforementioned rear door lock reinforcement 1, which is connected to the rear door inner panel 2, and the inner panel connecting part 131 is connected to the rear door inner panel 2.

[0075] The back door of this embodiment includes the aforementioned back door lock reinforcement 1, and therefore has the same technical effect as the aforementioned back door lock reinforcement 1, which will not be repeated here.

[0076] Please continue to refer to this. Figure 2 In some embodiments of this application, the main body 11 is provided with a back door lock connection hole 11a, and the main body 11 and the back door inner panel 2 are welded and fixed around each back door lock connection hole 11a by at least four welding points a.

[0077] As shown above, at least four welding points a are distributed around each back door lock connection hole 11a. By firmly connecting the main body 11 to the back door inner panel 2 through at least four welding points a, the connection reliability of the main body 11 and the back door inner panel 2 can be improved, local stress concentration can be reduced, the fatigue life of the welding points can be increased, and the structural stability of the entire back door lock reinforcement 1 can be improved. This allows the back door lock reinforcement 1 to better play its role in structurally reinforcing the location of the back door lock and minimize the possibility of deformation or tearing of the back door lock connection hole 11a.

[0078] Depend on Figure 3 It can be seen that the back door also includes a back door outer panel 3, which is connected to the outside of the back door inner panel 2, and the back door lock reinforcement 1 is located between the back door inner panel 2 and the back door outer panel 3.

[0079] This embodiment also provides a vehicle including the aforementioned tailgate.

[0080] The vehicle in this embodiment includes the aforementioned tailgate, and therefore has the same technical effect as the aforementioned tailgate, which will not be repeated here.

[0081] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A door lock reinforcement component, characterized in that, include: Main body (11); The first folding part (12) is connected to the rear side of the main body part (11) and bends downward; The support leg (13) is connected to the rear side of the first folding part (12) and located at the left and right ends of the first folding part (12). The support leg (13) extends downward and has an inner panel connecting part (131) for connecting the inner panel (2) of the back door at one end away from the first folding part (12).

2. The back door lock reinforcement according to claim 1, characterized in that, The rear door lock reinforcement (1) also includes: A reinforcing rib (14) is provided at least in part in the leg portion (13).

3. The rear door lock reinforcement according to claim 2, characterized in that, The main body (11) has a first connecting platform (17A) that is recessed downward at both ends. The reinforcing rib (14) extends along the extension direction of the support leg (13). The upper end of the reinforcing rib (14) extends to the rear end profile of the first connecting platform (17A), and the lower end of the reinforcing rib (14) extends to the front end profile of the inner plate connecting part (131).

4. The back door lock reinforcement according to any one of claims 1-3, characterized in that, The main body (11) has a recessed part (111) in the middle, and the bottom wall of the recessed part (111) is provided with a back door lock connection hole (11a).

5. The back door lock reinforcement according to any one of claims 1-3, characterized in that, The main body (11) is provided with a rear door lock through hole (11b), and the rear door lock reinforcement (1) further includes: The first electrophoresis extends through the boss (16A), the front end of which extends to the rear end profile that forms the back door lock through hole (11b), and the rear end of the first electrophoresis extends to the rear edge of the first fold (12).

6. The back door lock reinforcement according to any one of claims 1-3, characterized in that, The rear door lock reinforcement (1) also includes: The second folding part (15) is connected to the front side of the main body part (11) and bends upward. The left and right ends of the second folding part (15) are respectively provided with positioning holes (15a). One of the positioning holes (15a) is a strip-shaped hole extending in the left and right direction, and the other positioning hole (15a) is a round hole.

7. The back door lock reinforcement according to claim 4, characterized in that, The rear door lock reinforcement (1) also includes: The second folding part (15) is connected to the front side of the main body part (11) and bends upward. The left and right ends of the second folding part (15) are respectively provided with positioning holes (15a). One of the positioning holes (15a) is a strip-shaped hole extending in the left and right direction, and the other positioning hole (15a) is a round hole.

8. The back door lock reinforcement according to claim 5, characterized in that, The rear door lock reinforcement (1) also includes: The second folding part (15) is connected to the front side of the main body part (11) and bends upward. The left and right ends of the second folding part (15) are respectively provided with positioning holes (15a). One of the positioning holes (15a) is a strip-shaped hole extending in the left and right direction, and the other positioning hole (15a) is a round hole.

9. The rear door lock reinforcement according to claim 6, characterized in that, The second folding part (15) is provided with a plurality of forward-recessed second connecting sinks (17B) spaced apart in the left and right direction, and there is a rearward-protruding second electrophoresis through boss (16B) between two adjacent second connecting sinks (17B).

10. The back door lock reinforcement according to any one of claims 1-3, characterized in that, The thickness of the back door lock reinforcement (1) ranges from 1.5mm to 2mm.

11. The back door lock reinforcement according to any one of claims 1-3, characterized in that, The material of the back door lock reinforcement (1) includes high-strength steel.

12. A back door, characterized in that, include: (2) Inner panel of the back door; And the rear door lock reinforcement (1) according to any one of claims 1-11, wherein the rear door lock reinforcement (1) is connected to the rear door inner panel (2), and the inner panel connecting part (131) is connected to the rear door inner panel (2).

13. The back door according to claim 12, characterized in that, The main body (11) is provided with a back door lock connection hole (11a), and the main body (11) and the back door inner panel (2) are welded and fixed around each back door lock connection hole (11a) by at least four welding points (a).

14. A vehicle, characterized in that, Includes the back door as described in claim 12 or 13.

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