Frameless door structure and automobile

Abstract

The application relates to a frameless door structure and a car, and relates to the technical field of cars, which comprises a door body, an outer plate window sill reinforcing plate assembly fixed at a window sill of the door body in the transverse direction, and a door lock reinforcing plate fixed at a door lock of the door body in the longitudinal direction; the door lock reinforcing plate is fixedly connected with the outer plate window sill reinforcing plate assembly. The door lock reinforcing plate is fixedly connected with the outer plate window sill reinforcing plate, so that a closed loop structure is formed, the rigidity of an outer handle mounting point on the outer plate window sill reinforcing plate is increased, the design target is achieved, and the illusion of customer handle opening deformation is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to a frameless door structure and an automobile. Background Technology

[0002] Frameless doors refer to car doors with frameless windows. Frameless doors are generally used in sports cars or convertibles. The most obvious advantages of frameless doors are that they look good, are stylish and dynamic, have good sound insulation, and are safe. However, frameless doors require higher manufacturing technology compared to ordinary framed doors.

[0003] In related technologies, a car door and a vehicle having the same door are provided, aiming to solve or improve problems such as easily broken window glass and deteriorated overall vehicle sound quality in existing frameless doors. To this end, the proposed door includes an outer panel with a damping assembly. The damping assembly includes a first damping member, which is positioned below the window sill of the outer panel along the vehicle's height. By using the first damping member, the vibration amplitude caused by the motor during window glass adjustment can be reduced, improving the sound quality of opening and closing the window glass, thereby improving the overall vehicle sound quality. Simultaneously, it can reduce the possibility of window glass cracking caused by forceful door slamming. To reduce outer panel vibration and improve its modal characteristics, this solution uses butyl aluminum foil or butyl fiberglass sheet as a damping structure between the outer panel and its reinforcing ribs, increasing the process length and implementation time. In addition, the cost of fiberglass reinforced sheets is relatively high, which indirectly increases the cost of the product. Related technologies also provide a frameless car door inner panel structure and a frameless car door. The frameless car door inner panel structure includes an inner panel body, a crash beam, and at least one support frame. The inner panel body includes a panel and a surrounding body connected to the edge of the panel. The panel is configured to install a window regulator. The crash beam is fixed to the surrounding body. The crash beam and the panel are connected by at least one support frame. The connection between the crash beam and the panel is achieved through the support frame, which effectively improves the rigidity of the panel used to install the window regulator, so that the window regulator has good stability after being installed on the panel, and improves the stability during the window lifting process.

[0004] However, the above-mentioned structural design enhancements have not significantly strengthened the rigidity of the outer handle mounting point, which may lead to customers having the illusion that the handle deforms when opened and causing complaints. Summary of the Invention

[0005] This invention provides a frameless door structure and automobile to solve the problem in related technologies where the reinforced structure design does not significantly enhance the rigidity of the outer handle mounting point, leading to customer misperceptions and complaints about handle deformation when opened.

[0006] In a first aspect, a frameless door structure is provided, which includes: a door body; an outer panel sill reinforcement assembly fixed transversely at the sill of the door body; and a door lock reinforcement fixed longitudinally at the door lock of the door body; the door lock reinforcement is fixedly connected to the outer panel sill reinforcement assembly.

[0007] In some embodiments, the vertical distance between the upper end of the door lock reinforcement and the door waistline of the door body is ≤ 130 mm.

[0008] In some embodiments, an inner panel upper door frame reinforcement assembly is fixed transversely at the upper door frame of the door body, and the inner panel upper door frame reinforcement assembly is fixedly connected to the door lock reinforcement.

[0009] In some embodiments, the inner panel upper door frame reinforcement assembly includes an upper hinge reinforcement and an inner panel upper door frame reinforcement, and the upper hinge reinforcement is fixedly connected to the outer panel sill reinforcement assembly and the inner panel upper door frame reinforcement.

[0010] In some embodiments, the outer panel sill reinforcement assembly, the door lock reinforcement, and the inner panel upper door frame reinforcement assembly are sequentially connected to form a "square" shape.

[0011] In some embodiments, there are at least 11 welding points on one side of the upper door frame reinforcement assembly close to the outer panel sill reinforcement assembly.

[0012] In some embodiments, an outer panel reinforcement beam is fixed obliquely in the middle of the door body, and the outer panel reinforcement beam is fixedly connected to the door lock reinforcement.

[0013] In some embodiments, the inner panel upper door frame reinforcement assembly includes an upper hinge reinforcement and an inner panel upper door frame reinforcement, and the upper hinge reinforcement is fixedly connected to the outer panel sill reinforcement assembly; the outer panel sill reinforcement assembly, the door lock reinforcement, the outer panel reinforcement beam, and the upper hinge reinforcement are sequentially connected to form a "square" shape.

[0014] In some embodiments, a lapping portion extending to one side is provided on the door lock reinforcement, and the lapping portion is fixedly connected to the outer panel sill reinforcement assembly through structural adhesive.

[0015] In a second aspect, an automobile is provided, which includes the above frameless door structure.

[0016] The beneficial effects brought by the technical solution provided by the present invention include:

[0017] This invention provides a frameless car door structure and automobile. By fixing the door lock reinforcing plate to the outer window sill reinforcing plate, a closed-loop structure is formed, which increases the rigidity of the outer handle mounting point on the outer window sill reinforcing plate, achieves the design goal, and reduces the customer's illusion of handle deformation when opening. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the frameless car door structure provided in an embodiment of the present invention;

[0020] Figure 2 This is an exploded structural diagram of a frameless car door structure provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the frameless door structure before installation provided in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the frameless door structure after installation, provided in an embodiment of the present invention.

[0023] Figure 5 This is a partial structural diagram of the frameless car door structure provided in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the door lock reinforcement plate of the frameless car door structure provided in an embodiment of the present invention.

[0025] Numbering on the map:

[0026] 1. Door body; 11. Door outer panel; 12. Door inner panel; 13. Door waistline; 3. Lower hinge reinforcement plate assembly; 4. Door lock reinforcement plate; 41. Overlap section; 5. Window regulator front guide rail lower mounting point reinforcement plate; 6. Window regulator rear guide rail lower mounting point reinforcement plate; 7. Side impact beam; 8. Outer panel reinforcement beam; 9. Outer panel window sill reinforcement plate assembly; 10. Inner panel door frame reinforcement plate assembly. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] By decomposing the rigidity requirements of frameless doors, the factors affecting the rigidity of the door waistline / outer handle and the dynamic stiffness of the door lock were identified. Through summarizing and optimizing these factors, the rigidity of the inner and outer waistlines and the dynamic stiffness of the door lock in this invention's frameless door met the design requirements. Specifically, the distance between the door lock reinforcing plate 4 and the door waistline 13 has a significant impact on the dynamic stiffness of the door lock. The distance between the fish-shaped opening of the door lock reinforcing plate 4 and the door waistline 13 must be less than 130mm to ensure that the inner waistline stiffness meets the design specifications. The fundamental reason is that the fish-shaped opening structure is one of the constraint points of the entire door. When this constraint point is far from the target structure, its constraint effect on the target structure is smaller; the closer it is to the target structure, the greater its constraint effect. By reducing the length of the constraint arm, the mechanical properties of the target structure are optimized and improved. Secondly, the position of the weld points plays a significant role in the stiffness of the inner and outer waistlines. The rigidity decreases as the number of weld points decreases, but increasing the number of weld points does not increase the stiffness value. An appropriate number of weld points is one of the fundamental conditions for ensuring that the rigidity meets the design objectives. Specifically, the upper part of the waistline has 8 weld points, while the lower part has increased from 8 to 11 weld points. The relative increases are as follows: Figure 3 As shown in the elliptical frame. Finally, the door lock reinforcing plate 4 is connected to the outer window sill reinforcing plate assembly 9 to ensure that the rigidity of the outer handle mounting point meets the design specifications, thus avoiding the customer's misperception and complaints that the handle will deform when opened.

[0029] This invention provides a frameless door structure and automobile, which solves the problem in related technologies where the reinforced structure design does not significantly enhance the rigidity of the outer handle mounting point, leading to customer misperceptions and complaints about handle deformation when opened.

[0030] See Figure 1As shown, an embodiment of the present invention provides a frameless car door structure, which may include: a car door body 1; an outer panel window sill reinforcement plate assembly 9, which is fixed laterally to the window sill of the car door body 1; and a door lock reinforcement plate 4, which is fixed longitudinally to the door lock of the car door body 1; the door lock reinforcement plate 4 is fixedly connected to the outer panel window sill reinforcement plate assembly 9. In this embodiment, the door lock reinforcement plate 4 is fixed to the door lock of the car door body 1 to increase the rigidity of the door lock, and the outer panel window sill reinforcement plate assembly 9 is fixed to the window sill of the car door body 1 to increase the rigidity of the door window sill and the outer handle mounting point. By fixing the door lock reinforcement plate 4 to the outer panel window sill reinforcement plate assembly 9, a closed-loop structure is formed, which increases the rigidity of the outer handle mounting point on the outer panel window sill reinforcement plate assembly 9, thereby achieving the design goal, reducing the customer's illusion of handle deformation when opening, and reducing customer complaints.

[0031] As mentioned earlier, the fish-shaped opening structure of the car door is one of the constraint points of the entire door. The farther this constraint point is from the target structure, the weaker its constraint effect; conversely, the closer it is to the target structure, the stronger its constraint effect. By reducing the length of the constraint arm, the mechanical properties of the target structure can be optimized and improved. (See also...) Figure 3 and Figure 4 As shown, in some embodiments, the vertical distance between the upper end of the door lock reinforcing plate 4 and the door waistline 13 of the door body 1 is ≤130mm. When the arm length, i.e., the distance L between the door fish-shaped mouth and the waistline reinforcing plate, is greater than 130mm, not only does the stiffness of point P3 fail to meet the requirements and become unqualified, but the stiffness of the inner and outer waistlines is also significantly weakened. When the size is less than or equal to 130mm, the stiffness of point P3 can meet the requirements and become qualified, and the stiffness of the inner and outer waistlines is also significantly improved.

[0032] On the other hand, by increasing the size of the door lock reinforcing plate 4 from 220*195*125mm to 319*287*141mm through structural optimization, the rigidity of the handle mounting point on the outer panel window sill reinforcing plate assembly 9 is further increased, achieving the design goal.

[0033] See Figure 1 and Figure 2As shown, in some embodiments, an inner panel upper doorframe reinforcement assembly 10 is fixedly arranged along the transverse direction at the upper doorframe of the vehicle door body 1. The inner panel upper doorframe reinforcement assembly 10 is fixedly connected to the door lock reinforcement plate 4. In this embodiment, the inner panel upper doorframe reinforcement assembly 10 is fixed at the upper doorframe of the vehicle door body 1 to increase the stiffness of the upper doorframe of the vehicle door. The door lock reinforcement plate 4 is fixed at the door lock of the vehicle door body 1 to increase the stiffness of the door lock of the vehicle door. By fixedly connecting the door lock reinforcement plate 4 with the inner panel upper doorframe reinforcement assembly 10, the door lock reinforcement plate 4, the inner panel upper doorframe reinforcement assembly 10, and the outer panel window sill reinforcement assembly 9 are connected into a whole, further increasing the stiffness of the inner and outer waistlines of the vehicle door. Through structural optimization, the stiffness index of the product is improved, and the technological sense of the vehicle is enhanced. Among them, the inner panel upper doorframe reinforcement assembly 10 and the door lock reinforcement plate 4 can be fixedly connected by welding. If there are appearance design requirements for the fixing points, structural adhesive can also be used for fixation.

[0034] See Figure 3 and Figure 4 As shown, in some embodiments, the inner panel upper doorframe reinforcement assembly 10 includes an upper hinge reinforcement plate and an inner panel upper doorframe reinforcement plate. The upper hinge reinforcement plate is fixedly connected to the outer panel window sill reinforcement assembly 9 and the inner panel upper doorframe reinforcement plate. In this embodiment, the inner panel upper doorframe reinforcement assembly 10 is integrated by the upper hinge reinforcement plate and the inner panel upper doorframe reinforcement plate. The upper hinge reinforcement plate is fixed at the upper hinge of the vehicle door body 1 to increase the stiffness of the upper hinge of the vehicle door. The inner panel upper doorframe reinforcement assembly 10 is fixed at the upper doorframe of the vehicle door body 1 to increase the stiffness of the upper doorframe of the vehicle door. By fixedly connecting the upper hinge reinforcement plate with the outer panel window sill reinforcement assembly 9 and the inner panel upper doorframe reinforcement plate, the door lock reinforcement plate 4, the inner panel upper doorframe reinforcement assembly 10, and the outer panel window sill reinforcement assembly 9 are connected into a whole, further increasing the stiffness of the inner and outer waistlines of the vehicle door. Through structural optimization, the stiffness index of the product is improved, and the technological sense of the vehicle is enhanced. Among them, the upper hinge reinforcement plate and the outer panel window sill reinforcement assembly 9 and the inner panel upper doorframe reinforcement plate can be fixedly connected by welding. If there are appearance design requirements for the fixing points, structural adhesive can also be used for fixation.

[0035] See Figure 2 、 Figure 3 and Figure 4 As shown, in some embodiments, the outer panel window sill reinforcement assembly 9, the door lock reinforcement plate 4, and the inner panel upper doorframe reinforcement assembly 10 are sequentially connected to form a "square" shape. In this embodiment, by connecting the lower hinge reinforcement assembly 3, the door lock reinforcement plate 4, and the inner panel upper doorframe reinforcement assembly 10 into a whole and forming a "square" shape, a stable closed-loop structure is formed among the three, further increasing the stiffness of the inner and outer waistlines of the vehicle door. Through structural optimization, the stiffness index of the product is improved, and the technological sense of the vehicle is enhanced.

[0036] In another embodiment, the outer window sill reinforcement plate assembly 9, the door lock reinforcement plate 4, and the inner door frame reinforcement plate assembly 10 can also be connected to form a trapezoid, or can be formed into a stable closed-loop structure through other shapes, further increasing the rigidity of the inner and outer waistlines of the car door.

[0037] In another embodiment, the outer window sill reinforcement plate assembly 9 and the inner door frame reinforcement plate assembly 10 can be connected to form a U-shape, or the door lock reinforcement plate 4 and the inner door frame reinforcement plate assembly 10 can be connected to form a U-shape. In short, by connecting and fixing two, three or four of them, the rigidity of the inner and outer waistlines of the car door can be improved.

[0038] See Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the inner panel door frame reinforcement plate assembly 10 has at least 11 welding points on the side near the outer panel window sill reinforcement plate assembly 9. In this embodiment, by decomposing the requirements for the rigidity of the frameless door, the factors affecting the rigidity of the door waistline / outer handle and the dynamic rigidity of the door lock were discovered. Among them, the position of the welding points plays a significant role in the rigidity of the inner and outer waistlines. The rigidity decreases as the number of welding points decreases, but increasing the number of welding points does not increase the rigidity value. An appropriate number of welding points is one of the basic conditions for ensuring that the rigidity meets the design target. The upper part of the waistline has 8 welding points, and the lower part has increased from the original 8 welding points to 11 welding points. The spacing between the 3 welding points is about 30mm-40mm, which further increases the rigidity of the inner and outer waistlines of the door and improves the rigidity index of the product.

[0039] See Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, an outer panel reinforcing beam 8 is obliquely fixed to the middle of the door body 1. The outer panel reinforcing beam 8 is fixedly connected to the door lock reinforcing plate 4. In this embodiment, the outer panel reinforcing beam 8 is fixed to the middle of the door body 1 to increase the rigidity of the outer panel of the door. The door lock reinforcing plate 4 is fixed to the door lock of the door body 1 to increase the rigidity of the door lock. By fixing the outer panel reinforcing beam 8 and the door lock reinforcing plate 4, the outer panel reinforcing beam 8, the door lock reinforcing plate 4, and the outer panel window sill reinforcing plate assembly 9 are connected into a whole, further increasing the rigidity of the inner and outer waistlines of the door. Through structural optimization, the rigidity index of the product is improved, enhancing the technological feel of the vehicle. The outer panel reinforcing beam 8 and the door lock reinforcing plate 4 can be fixed by welding. If there are aesthetic design requirements for the fixing point, structural adhesive can also be used for fixing.

[0040] See Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the door inner panel upper doorframe reinforcement assembly 10 includes an upper hinge reinforcement plate and a door inner panel upper doorframe reinforcement plate. The upper hinge reinforcement plate is fixedly connected to the outer panel sill reinforcement assembly 9. In this embodiment, the door inner panel upper doorframe reinforcement assembly 10 is fixed at the upper doorframe of the door body 1 to increase the stiffness at the upper doorframe of the door. The outer panel reinforcement beam 8 is fixed at the middle of the door body 1 to increase the stiffness of the outer panel of the door. By fixedly connecting the upper hinge reinforcement plate to the outer panel sill reinforcement assembly 9, the upper hinge reinforcement plate, the door lock reinforcement plate 4, the outer panel reinforcement beam 8, and the outer panel sill reinforcement assembly 9 are connected into a whole, further increasing the stiffness of the inner and outer waistlines of the door. Through structural optimization, the stiffness index of the product is improved, and the technological sense of the vehicle is enhanced. Among them, the upper hinge reinforcement plate and the outer panel sill reinforcement assembly 9 can be fixedly connected by welding. If there are appearance design requirements for the fixing points, structural adhesive can also be used for fixing.

[0041] See Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, in some embodiments, the outer panel sill reinforcement assembly 9, the door lock reinforcement plate 4, the outer panel reinforcement beam 8, and the upper hinge reinforcement plate are sequentially connected to form a "square" shape. In this embodiment, by connecting the upper hinge reinforcement plate, the door lock reinforcement plate 4, the outer panel reinforcement beam 8, and the outer panel sill reinforcement assembly 9 into a whole and forming a "square" shape, the four form a stable closed-loop structure, further increasing the stiffness of the inner and outer waistlines of the door. Through structural optimization, the stiffness index of the product is improved, and the technological sense of the vehicle is enhanced.

[0042] In another embodiment, the outer panel sill reinforcement assembly 9, the door lock reinforcement plate 4, the outer panel reinforcement beam 8, and the upper hinge reinforcement plate can also be connected to form a trapezoid, or a stable closed-loop structure can be formed through other shapes, further increasing the stiffness of the inner and outer waistlines of the door.

[0043] In another embodiment, it can also be that the outer panel sill reinforcement assembly 9, the outer panel reinforcement beam 8, and the upper hinge reinforcement plate are connected to form a "U" shape, or the outer panel sill reinforcement assembly 9, the door lock reinforcement plate 4, and the outer panel reinforcement beam 8 are connected to form a "U" shape, or the door lock reinforcement plate 4, the outer panel reinforcement beam 8, and the upper hinge reinforcement plate are connected to form a "U" shape. In short, by fixedly connecting two, three, or four of them, the stiffness of the inner and outer waistlines of the door can be improved.

[0044] See Figure 6As shown, in some embodiments, the door lock reinforcing plate 4 is provided with an overlapping portion 41 extending to one side. The overlapping portion 41 is fixedly connected to the outer panel window sill reinforcing plate assembly 9 by structural adhesive. In this embodiment, the door lock reinforcing plate 4 is provided with two overlapping portions 41 extending to the same side. The two overlapping portions 41 are spaced apart. The overlapping portions 41 are fixedly connected to the outer panel window sill reinforcing plate assembly 9 by structural adhesive, which improves the rigidity of the product, enhances the technological feel of the vehicle, and meets the requirements of the door appearance design.

[0045] In summary, the frameless door structure of this invention comprises 10 parts: an outer door panel 11, an inner door panel 12, a lower hinge reinforcement plate assembly 3, a door lock reinforcement plate 4, a front guide rail lower mounting point reinforcement plate 5, a rear guide rail lower mounting point reinforcement plate 6, a side impact beam 7, an outer panel reinforcement beam 8, an outer panel window sill reinforcement plate assembly 9, and an inner panel door frame reinforcement plate assembly 10. By increasing the size of the door lock reinforcement plate 4, it has been optimized from 220*195*125mm to 319*287*141mm, and as... Figure 3 As shown, three welding points are added to the door frame reinforcement plate assembly 10 on the inner panel. Secondly, the door lock reinforcement plate 4 is designed with an overlapping structure and is connected to the outer window sill reinforcement plate assembly 9 with structural adhesive to form a closed loop structure, thereby increasing the rigidity of the handle mounting point on the outer window sill reinforcement plate assembly 9 and achieving the design goal.

[0046] See Figure 1 As shown, an embodiment of the present invention provides a car, which includes the frameless door structure described above. The frameless door structure may include: a door body 1; an outer panel window sill reinforcement plate assembly 9, which is fixed laterally to the window sill of the door body 1; and a door lock reinforcement plate 4, which is fixed longitudinally to the door lock of the door body 1. The door lock reinforcement plate 4 is fixedly connected to the outer panel window sill reinforcement plate assembly 9. In this embodiment, the door lock reinforcement plate 4 is fixed to the door lock of the door body 1 to increase the rigidity of the door lock. The outer panel window sill reinforcement plate assembly 9 is fixed to the window sill of the door body 1 to increase the rigidity of the door window sill and the outer handle mounting point. By fixing the door lock reinforcement plate 4 to the outer panel window sill reinforcement plate assembly 9, a closed-loop structure is formed, which increases the rigidity of the outer handle mounting point on the outer panel window sill reinforcement plate assembly 9, thereby achieving the design goal, reducing the customer's illusion of handle deformation when opening, and reducing customer complaints.

[0047] Among them, see Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the outer panel sill reinforcement assembly 9, the door lock reinforcement 4, and the inner panel upper door frame reinforcement assembly 10 are connected in sequence to form a "square" shape. The outer panel sill reinforcement assembly 9, the door lock reinforcement 4, the outer panel reinforcement beam 8, and the upper hinge reinforcement are connected in sequence to form a "square" shape. In this embodiment, by connecting the lower hinge reinforcement assembly 3, the door lock reinforcement 4, and the inner panel upper door frame reinforcement assembly 10 into a whole, and by connecting the upper hinge reinforcement, the door lock reinforcement 4, the outer panel reinforcement beam 8, and the outer panel sill reinforcement assembly 9 into a whole, a stable closed-loop structure is formed among the three, further increasing the stiffness of the inner and outer waistlines of the door and the stiffness of the handle mounting point on the outer panel sill reinforcement. Through structural optimization, the stiffness index of the product is improved.

[0048] Table 1

[0049]

[0050] Table 1 is the data table of the stiffness of the handle mounting point before and after optimization. As can be seen from the table, after the optimization of the frameless door structure of the present invention by the above technical solution, the stiffness of the handle mounting point on the outer panel sill reinforcement is increased, meeting the design requirements.

[0051] Table 2

[0052]

[0053] Table 2 is the data table of the stiffness of the inner and outer waistlines of the rear door before and after optimization. As can be seen from the table, after the optimization of the frameless door structure of the present invention by the above technical solution, the stiffness of the inner and outer waistlines is increased, meeting the design requirements.

[0054] The principle of a frameless door structure and an automobile provided by an embodiment of the present invention is as follows:

[0055] The key points and protection points of the present invention lie in creatively recognizing the positional relationship between the door lock reinforcement of the frameless door and the waistline, that is, the requirement that the distance between the fish-shaped mouth of the door lock reinforcement 4 and the door waistline 13 should be less than 130 mm. The fundamental reason is that the fish-shaped mouth structure of the door is one of the constraint points of the entire door. When the constraint point is far from the target structure, its constraint effect on the target structure is smaller, and when it is closer to the target structure, its constraint effect on the target structure is greater. By reducing the size of the constraint arm length, the mechanical properties of the target structure are optimized and improved, and a structural optimization scheme that can meet the stiffness requirements is found, that is, by designing a lapped structure for the door lock reinforcement 4, connecting it with the outer panel sill reinforcement assembly 9 with structural adhesive, and connecting it with the inner panel upper door frame reinforcement assembly 10 to form a closed-loop structure, thereby increasing the stiffness of the handle mounting point on the outer panel sill reinforcement assembly 9 and increasing the stiffness of the inner and outer waistlines.

[0056] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a 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 between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0057] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0058] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A frameless car door structure, characterized in that, It includes: A door body (1); An outer panel sill reinforcement assembly (9), which is fixed transversely at the sill of the door body (1); And a door lock reinforcement plate (4), which is fixed longitudinally at the door lock of the door body (1); the door lock reinforcement plate (4) is fixedly connected to the outer panel sill reinforcement assembly (9); The perpendicular distance from the upper end of the door lock reinforcement plate (4) to the door waistline (13) of the door body (1) is ≤ 130 mm; An inner panel upper door frame reinforcement assembly (10) is fixed transversely at the upper door frame of the door body (1), and the inner panel upper door frame reinforcement assembly (10) is fixedly connected to the door lock reinforcement plate (4); There are at least 11 welding points on one side of the inner panel upper door frame reinforcement assembly (10) close to the outer panel sill reinforcement assembly (9).

2. The frameless door structure according to claim 1, wherein: The inner panel upper door frame reinforcement assembly (10) includes an upper hinge reinforcement plate and an inner panel upper door frame reinforcement plate, and the upper hinge reinforcement plate is fixedly connected to the outer panel sill reinforcement assembly (9) and the inner panel upper door frame reinforcement plate.

3. The frameless door structure according to claim 2, wherein: The outer panel sill reinforcement assembly (9), the door lock reinforcement plate (4) and the inner panel upper door frame reinforcement assembly (10) are sequentially connected to form a "square" shape.

4. The frameless door structure according to claim 1, wherein: An outer panel reinforcement beam (8) is fixed obliquely in the middle of the door body (1), and the outer panel reinforcement beam (8) is fixedly connected to the door lock reinforcement plate (4).

5. The frameless door structure according to claim 4, wherein: The inner panel upper door frame reinforcement assembly (10) includes an upper hinge reinforcement plate and an inner panel upper door frame reinforcement plate, and the upper hinge reinforcement plate is fixedly connected to the outer panel sill reinforcement assembly (9); The outer panel sill reinforcement assembly (9), the door lock reinforcement plate (4), the outer panel reinforcement beam (8) and the upper hinge reinforcement plate are sequentially connected to form a "square" shape.

6. The frameless door structure according to claim 1, wherein: A lapping portion (41) extending to one side is provided on the door lock reinforcement plate (4), and the lapping portion (41) is fixedly connected to the outer panel sill reinforcement assembly (9) through structural adhesive.

7. A car, characterized in that, It includes the frameless door structure according to any one of claims 1 to 6.

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