A side opening back door assembly and vehicle

Abstract

The application provides a side-opening back door assembly and a vehicle, and belongs to the technical field of vehicle back doors. A force transmission cavity arranged on a first side of a window frame close to a door body and a hinge mounting surface correspond to each other in the up-down direction, forming a through hinge force transmission channel. The load borne by the hinge assembly can be more smoothly dispersed to the entire window frame and the door body frame through the hinge force transmission channel. The force distribution of the hinge assembly is optimized, the risk of local overload is reduced, the overall stiffness of the door body is improved, the sagging problem of the existing side-opening back door caused by force transmission defects is solved, and the reliability, durability and vehicle driving quality of the door body are significantly improved. By offsetting the spare tire to one side of the hinge assembly, the force arm of the spare tire gravity relative to the hinge assembly can be shortened, the torque borne by the hinge assembly is also reduced, the risk of deformation of the hinge assembly under long-term alternating load is reduced, and the sagging of the door body is effectively avoided.

Description

Technical Field

[0001] This application belongs to the field of vehicle tailgate technology, and more specifically, relates to a side-opening tailgate assembly and a vehicle. Background Technology

[0002] The tailgate is a key component in the rear of a vehicle used for opening and closing storage space. It combines functionality and aesthetics, and is an important part of the overall vehicle design that influences user experience and appearance. In terms of opening mechanism, tailgates are mainly divided into two categories: side-opening and lift-up. Side-opening tailgates open by rotating towards one side of the vehicle body, with a hinge as the axis.

[0003] As a highly visible moving component of a vehicle, the reliability, aesthetics, and operational comfort of a side-opening tailgate significantly impact the overall quality and perceived class of the vehicle. However, in existing technologies, side-opening tailgates equipped with a spare tire mount are prone to sagging due to the continuous load exerted on the tailgate structure by the spare tire's weight. This can lead to unnecessary vibrations and abnormal noises during driving, negatively affecting the vehicle's ride quality. Utility Model Content

[0004] The purpose of this application is to provide a side-opening tailgate assembly and vehicle, which aims to solve the technical problem in the prior art that the tailgate is prone to sagging due to the installation of a spare tire on the back, thereby affecting the driving quality of the vehicle.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: Firstly, a side-opening rear tailgate assembly is provided, comprising: The door body, the upper part of which has a window frame, and the rear part of which has a spare tire; and A hinge assembly is connected to the first side of the door body, and the connection surface between the door body and the hinge assembly is the hinge mounting surface; The window frame has a hollow force transmission cavity formed in the frame near the first side of the door body. The force transmission cavity extends in the vertical direction and corresponds to the hinge mounting surface to form a hinge force transmission channel.

[0006] In traditional designs, for aesthetic reasons, the side frame of the tailgate window is positioned closer to the vertical center line of the tailgate than the hinge itself, or it is angled upwards away from the hinge. This causes a lateral misalignment between the hinge, the tailgate mounting surface, and the side frame. Consequently, the load on the hinge cannot be effectively distributed to the tailgate frame through the side frame, affecting the smoothness of the force transmission path. When the vehicle is in motion, the alternating loads generated by road bumps repeatedly act on the hinge connection point, accelerating hinge wear and even causing vibrations and abnormal noises. Ultimately, this can lead to tailgate sagging, severely impacting the vehicle's driving quality.

[0007] The beneficial effects of the side-opening rear door assembly provided by this utility model are as follows: Compared with the prior art, by aligning the force transmission cavity located on the first side of the window frame near the door body with the hinge mounting surface, a vertically connected hinge force transmission channel is formed. When the weight of the door body and the spare tire is transmitted to the hinge assembly, the load borne by the hinge assembly can be more smoothly distributed to the entire window frame and door frame through the hinge force transmission channel, optimizing the force distribution of the hinge assembly, reducing the risk of local overload, and helping to enhance the overall rigidity of the door body. From a structural perspective, it solves the sagging problem caused by the force transmission defects of existing side-opening rear doors, and significantly improves the reliability, durability, and overall vehicle driving quality of the door body.

[0008] In conjunction with the first aspect, in one possible implementation, the spare tire is positioned close to the first side of the door body, and the horizontal distance between the center of the spare tire and the vertical centerline of the door body is not less than 60mm.

[0009] Positioning the spare tire closer to the first side of the door, that is, shifting the spare tire towards the hinge assembly, shortens the lever arm of the spare tire's weight relative to the hinge assembly. Consequently, the torque borne by the hinge assembly is reduced, lowering the risk of hinge assembly deformation under long-term alternating loads and effectively preventing the door from sagging.

[0010] In conjunction with the first aspect, in one possible implementation, the hinge assembly includes a first hinge and a second hinge spaced apart in a vertical direction, the second hinge being located below the first hinge; The distance between the first hinge and the second hinge is defined as L1, the distance from the top surface of the first hinge to the lower edge of the door is defined as L2, and the height of the door is defined as L3, wherein L1 / L3≥0.4 and L2 / L3≥0.5.

[0011] Limiting L1 / L3 to ≥ 0.4 ensures that the first and second hinges evenly distribute the weight of the door carrying the spare tire, reducing local stress concentration on the hinge mounting surfaces. Limiting L2 / L3 to ≥ 0.5 ensures that the first hinge is positioned in the upper-middle region of the door's height, bringing the point of force application of the first and second hinges closer to the door's center of gravity. This shortens the vertical distance between the door's center of gravity and the hinge assembly support point, reducing the overturning moment caused by gravity and minimizing the door's tendency to sag around the hinge assembly.

[0012] A well-designed hinge assembly can effectively improve the overall torsional stiffness of the tailgate. In addition, optimized force transmission in the hinge force transmission channel can significantly improve the tailgate's anti-sagging performance, thereby reducing the probability of vibration and abnormal noise and increasing the structural stability of the tailgate.

[0013] In some embodiments, both the first hinge and the second hinge include: A first hinge plate is connected to the door body. The surface of the door body that is connected to the first hinge plate is the hinge mounting surface. The hinge mounting surface is set at an angle to the left and right directions. The second hinge plate is used to connect to the vehicle body; and A hinge shaft is provided, and the first hinge plate and the second hinge plate are hinged together by the hinge shaft. The hinge axis of the first hinge and the hinge axis of the second hinge are collinear to form a hinge axis, which is gradually inclined forward from bottom to top.

[0014] Tilt the hinge axis forward by 3°-4° to optimize the door's stress posture, reduce its own bending deformation, lower local stress on the hinge mounting surface, and help improve anti-sagging performance. Simultaneously, the tailgate rotates outwards and slightly rises when opening, and tends to automatically conform to the vehicle body when closing, improving the door's movement trajectory during opening and closing and enhancing the usability of the side-opening tailgate.

[0015] In some embodiments, the door body has an outwardly opening clearance notch on the side edge of the first side, the clearance notch is provided through the thickness direction of the door body, and the hinge pivot is provided in the clearance notch so that the hinge pivot is provided close to the edge of the first side of the door body.

[0016] The avoidance notch design allows the hinge pivot to be as close as possible to the side edge of the door, thereby reducing the movement radius of the side edge of the door and preventing the side edge from getting stuck in the side wall of the vehicle body when the door is opened. This effectively solves the problem of the door being unable to open due to ice forming in the water channels of the side wall of the vehicle body in rainy, snowy, or extremely cold weather.

[0017] In some embodiments, the door body is further provided with a locking fastener for locking connection with the vehicle body. The locking fastener is located on the second side of the door body, which is opposite to the first side of the door body. The locking fastener is horizontally aligned with the center of gravity of the door body and is not higher than the top surface of the first hinge.

[0018] By positioning the latch to align horizontally with the center of gravity of the door and ensuring it is not higher than the top surface of the first hinge, a stable triangular support structure can be formed with the first and second hinges, thereby increasing the support rigidity of the door and effectively suppressing the door from swaying left and right under bumpy road conditions.

[0019] In some embodiments, a reinforcing plate is also provided inside the force transmission cavity, and the reinforcing plate is supported and connected between the left side wall and the right side wall of the force transmission cavity.

[0020] The reinforcing plate connects the two side walls of the force transmission cavity, which is equivalent to adding a transverse support frame inside the hollow force transmission cavity. This directly improves the bending and shear resistance of the window frame's side frame in the left and right directions, reduces the risk of side frame cracking, and helps to improve the overall rigidity of the door.

[0021] In some embodiments, the door body includes an inner door panel and an outer door panel connected to each other, the force transmission cavity is formed between the inner door panel and the outer door panel, and an installation cavity is also formed below the window frame; The first hinge plate and the latch are both connected to the inner door panel, and the spare tire is connected to the outer door panel. The first hinge plate, the latch, and the spare tire all correspond to the mounting cavity. The lower part of the reinforcing plate extends downward into the mounting cavity and forms a bent portion that fits against the inner door panel. The first hinge plate is stacked and connected to the inner door panel and the bent portion.

[0022] The lower part of the reinforcing plate extends into the mounting cavity, forming a continuous longitudinal support structure between the window frame and the lower part of the door. This allows the force transmission cavity to correspond with the hinge mounting surface, creating a smoother hinge force transmission channel. This ensures that the load at the hinge assembly is reliably transmitted, improves the overall performance of the door, and reduces vibration and abnormal noise.

[0023] The bending section enhances the rigidity of the hinge mounting surface, improves its shear strength, prevents plastic deformation or tearing of the inner door panel, and reduces the occurrence of the rear door sagging due to loose hinge components.

[0024] In conjunction with the first aspect, in one possible implementation, a buffer block is provided above the second side of the door body, the buffer block having a compression deformation amount of 2mm-4mm for pressing against the rear wall of the vehicle body.

[0025] When the door is closed and locked to the vehicle body by the latches, the buffer block is compressed and deformed by 2mm-4mm, so that the buffer block is tightly pressed against the rear wall of the vehicle body, filling the tiny gap between the door and the vehicle body, effectively limiting the slight shaking of the door during vehicle operation, and reducing the risk of abnormal noise on bumpy roads.

[0026] Secondly, embodiments of this application also provide a vehicle including the aforementioned side-opening tailgate assembly.

[0027] The beneficial effects of this utility model on the vehicle are as follows: Compared with the prior art, in the side-opening rear door assembly of the vehicle, by making the force transmission cavity located on the first side of the window frame near the door body correspond vertically with the hinge mounting surface, a vertically connected hinge force transmission channel is formed. This allows the load borne by the hinge assembly to be more smoothly distributed to the entire window frame and door frame through the hinge force transmission channel, optimizing the force distribution of the hinge assembly, reducing the risk of local overload, helping to enhance the overall rigidity of the door body, effectively solving the sagging problem caused by the force transmission defects of the existing side-opening rear door, avoiding the generation of additional vibration and abnormal noise, and significantly improving the driving quality of the vehicle. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a side-opening rear tailgate assembly provided in an embodiment of this application; Figure 2 Examples of this application Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 Examples of this application Figure 1 Enlarged structural diagram of section B; Figure 4 Examples of this application Figure 1 Schematic diagram of the cross-sectional structure along the CC line; Figure 5 Examples of this application Figure 3 Front view sectional structural diagram; Figure 6 This is a rear view structural diagram of a side-opening rear tailgate assembly provided in an embodiment of this application.

[0030] In the picture: 1. Door body; 11. Window frame; 111. Force transmission cavity; 12. Avoidance notch; 13. Inner door panel; 14. Outer door panel; 15. Reinforcing plate; 151. Bending part; 16. Mounting cavity; 2. Spare tire; 3. Hinge assembly; 31. First hinge; 311. First hinge plate; 312. Second hinge plate; 313. Hinge pivot; 32. Second hinge; 4. Locking fastener; 5. Buffer block. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and are not intended to 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 this application.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0034] Existing side-opening tailgates are hinged to the vehicle body via a hinge located on one side. For side-opening tailgates equipped with a spare tire mounted on the back, the entire weight of the spare tire (typically 30-50 kg) is loaded onto the tailgate, easily causing a "sag moment" and resulting in stress concentration at the hinge-to-tailgate connection point. In traditional designs, for aesthetic reasons, the tailgate window frame's edge near the hinge is positioned closer to the tailgate's vertical center line, or tilted upwards away from the hinge. This causes a lateral misalignment between the hinge's mounting surface and the side frame, preventing the load on the hinge from being effectively distributed to the tailgate frame through the side frame, thus affecting the smoothness of the force transmission path. When the vehicle is in motion, the alternating loads generated by road bumps repeatedly act on the hinge connection point, accelerating hinge wear and even causing vibrations and abnormal noises, ultimately leading to tailgate sagging and severely impacting the vehicle's ride quality.

[0035] To resolve the above technical issues, please refer to the following: Figures 1 to 6 This application describes a side-opening tailgate assembly and a vehicle thereof. The side-opening tailgate assembly includes a door body 1 and a hinge assembly 3. A window frame 11 is formed on the upper part of the door body 1, and a spare tire 2 is provided at the rear of the door body 1. The hinge assembly 3 is connected to the first side of the door body 1, and the connection surface between the door body 1 and the hinge assembly 3 is the hinge mounting surface. Among them, a hollow force transmission cavity 111 is formed in the frame of the window frame 11 near the first side of the door body 1. The force transmission cavity 111 extends in the vertical direction and corresponds to the hinge mounting surface to form a hinge force transmission channel.

[0036] It should be noted that, for ease of understanding, the directions or positional relationships indicated by "front," "rear," "up," and "down" in this embodiment are based on the vehicle's own orientation. Specifically, the front of the vehicle represents "front," the rear of the vehicle represents "rear," the top of the vehicle represents "up," and the bottom of the vehicle represents "down." The first side defined in this embodiment refers to the left side of the door 1 when facing the front of the vehicle; the first side in the following text is equivalent to the left side.

[0037] This application provides a side-opening rear door assembly. Compared with the prior art, by aligning the force transmission cavity 111 located on the first side of the window frame 11 near the door body 1 with the hinge mounting surface, a vertically connected hinge force transmission channel is formed. When the weight of the door body 1 and the spare tire 2 is transmitted to the hinge assembly 3, the load borne by the hinge assembly 3 can be more smoothly distributed to the entire area of ​​the window frame 11 and the frame of the door body 1 through this hinge force transmission channel. This optimizes the force distribution of the hinge assembly 3, reduces the risk of local overload, and helps to enhance the overall rigidity of the door body 1. It solves the sagging problem caused by the force transmission defects of existing side-opening rear doors from a structural perspective, and significantly improves the reliability, durability, and overall vehicle driving quality of the door body 1.

[0038] In the actual design process, the vertical centerline of the force transmission cavity 111 should be aligned with the hinge mounting surface in the same vertical plane as much as possible. This ensures that the force transmission cavity 111 and the hinge mounting surface are vertically aligned to form a smooth hinge force transmission channel, thereby improving the ability of the load at the hinge assembly 3 to be transmitted from the window frame 11 to the door frame 1. At the same time, the proportional coordination of the window frame 11 should also be taken into account to ensure the overall aesthetics of the vehicle.

[0039] Alternatively, the hinge mounting surface can be located on the left side of the force transmission cavity 111, and the distance between the two can be no more than 5mm, to ensure the vertical correspondence between the force transmission cavity 111 and the hinge mounting surface, and to ensure the effective transmission of load force from the hinge force transmission channel to the hinge assembly 3.

[0040] Specifically, the spare tire 2 is installed on the rear side of the door body 1 via a connecting bracket, and a buffer pad is provided between the spare tire 2 and the connecting bracket to prevent the wheel hub of the spare tire 2 from forming a rigid collision with the door body 1 when the door body 1 is opened and closed, thereby avoiding increasing the stress on the door body 1 and ensuring the stability of the door body 1.

[0041] The front side of the door body 1 is also provided with a circumferentially extending sealing strip. The sealing strip is used to seal the side of the vehicle body. At the same time, with the help of the elasticity of the sealing strip, it can also play a certain buffering role when closing the door body 1, which reduces the impact force on the door body 1 when frequently opening and closing the door body 1, and reduces the occurrence of the door body 1 sagging.

[0042] One modified embodiment of the above-mentioned side-opening tailgate assembly is described in [reference needed]. Figure 6 The spare tire 2 is located on the first side of the door body 1, and the horizontal distance between the center of the spare tire 2 and the vertical center line of the door body 1 is not less than 60mm.

[0043] As the main load-bearing component of the rear door, the installation position of the spare tire 2 directly affects the torque borne by the hinge assembly 3. In this embodiment, the spare tire 2 is positioned closer to the first side of the door body 1, that is, the spare tire 2 is offset towards the hinge assembly 3. This shortens the lever arm of the spare tire 2's weight relative to the hinge assembly 3, thereby reducing the torque borne by the hinge assembly 3. This reduces the risk of deformation of the hinge assembly 3 under long-term alternating loads and effectively prevents the door body 1 from sagging.

[0044] In addition, the spare tire 2 is arranged close to the hinge assembly 3, so that the load generated by its gravity can be transmitted more directly to the force transmission cavity 111 through the hinge mounting surface, and quickly dispersed to the upper frame of the door body 1 through the hinge force transmission channel, thereby strengthening the deformation resistance of the overall structure of the rear door.

[0045] Specifically, the horizontal distance between the center of the spare tire 2 (i.e. the center of the circular cross-section of the spare tire 2) and the vertical center line (Y0 line) of the door body 1 can be 70mm, 75mm or 80mm. The closer the spare tire 2 is to the hinge assembly 3, the better the anti-sagging performance of the side-opening rear door.

[0046] In some embodiments, the hinge assembly 3 described above may employ, as follows: Figure 6 The structure shown. See also Figure 6 The hinge assembly 3 includes a first hinge 31 and a second hinge 32 spaced apart in the vertical direction, with the second hinge 32 located below the first hinge 31; the distance between the first hinge 31 and the second hinge 32 is defined as L1, the distance from the top surface of the first hinge 31 to the lower edge of the door 1 is defined as L2, and the height of the door 1 is defined as L3, wherein L1 / L3≥0.4 and L2 / L3≥0.5.

[0047] Understandably, the distance between the first hinge 31 and the second hinge 32 can be the distance between the vertical midpoint of the first hinge 31 and the vertical midpoint of the second hinge 32, or it can be the distance between the top surfaces of the first hinge 31 and the second hinge 32. This distance L1 determines the support span of the hinge assembly 3 in the vertical direction; the distance L2 determines the layout height of the hinge assembly 3; and the door height L3 is the distance between the upper edge and the lower edge of the door 1. The larger the values ​​of L1 / L3 and L2 / L3, the better the anti-sagging performance of the side-opening rear door.

[0048] According to the principles of structural mechanics, under the same load, the larger the support span between the first hinge 31 and the second hinge 32, the smaller the vertical component force borne by a single hinge. Furthermore, the bending deformation of the door body 1 under gravity or alternating loads is inversely proportional to the support span (the larger the support span, the more uniform the bending moment distribution). Therefore, limiting L1 / L3 to ≥ 0.4 allows the first hinge 31 and the second hinge 32 to evenly distribute the weight of the door body 1 carrying the spare tire 2, reducing local stress concentration on the hinge mounting surfaces. For example, when L3 is 1200mm, L1 should be greater than or equal to 480mm. Specifically, the value of L1 / L3 can be 0.5, 0.6, or 0.65.

[0049] The L2 / L3 ≥ 0.5 constraint ensures that the first hinge 31 is positioned in the upper-middle region of the door body 1, bringing the resultant force application point of the first hinge 31 and the second hinge 32 closer to the center of gravity of the door body 1. This shortens the vertical distance between the center of gravity of the door body 1 and the support point of the hinge assembly 3, reducing the overturning moment caused by gravity and minimizing the downward tendency of the door body 1 around the hinge assembly 3. Simultaneously, the higher position of the first hinge 31 allows for more direct load transmission through the hinge force transmission channel, thereby optimizing the overall stress distribution of the door body 1. Specifically, the value of L2 / L3 can be 0.6, 0.65, or 0.7.

[0050] The reasonable layout of hinge assembly 3 can effectively improve the overall torsional stiffness of the tailgate. At the same time, the optimization of force transmission in the hinge force transmission channel can significantly improve the anti-sagging performance of the tailgate, thereby reducing the probability of vibration and abnormal noise and increasing the structural stability of the tailgate.

[0051] For some specific embodiments, see Figure 1 and Figure 3The first hinge 31 and the second hinge 32 both include a first hinge plate 311, a second hinge plate 312, and a hinge pivot 313. The first hinge plate 311 is connected to the door body 1. The surface on the door body 1 that is connected to the first hinge plate 311 is the hinge mounting surface, which is set at an angle to the left and right directions. The second hinge plate 312 is used to connect to the vehicle body. The first hinge plate 311 and the second hinge plate 312 are hinged together by the hinge pivot 313. The hinge pivot 313 of the first hinge 31 and the hinge pivot 313 of the second hinge 32 are collinear to form a hinge axis, which is gradually inclined forward from bottom to top.

[0052] Both the first hinge plate 311 and the second hinge plate 312 are plate-shaped components, which helps to increase the area of ​​the hinge mounting surface and the connection surface between the second hinge plate 312 and the vehicle body, thereby increasing the connection stability. Specifically, the plate surface of the first hinge plate 311 extends in the front-rear direction, and the door body 1 has a connection surface parallel to the first hinge plate 311 as the hinge mounting surface; the plate surface of the second hinge plate 312 extends in the left-right direction and is used to connect to the rear wall of the vehicle body. The hinge mounting surface is set at an angle with the left-right direction, so that the first hinge plate 311 and the second hinge plate 312 also form an angle, which helps to improve the assembly and user experience of the hinge assembly 3. Specifically, the angle between the hinge mounting surface and the left-right direction can be an acute angle greater than or equal to 70° and less than 90°, specifically 75°, 80°, or 85°.

[0053] In this embodiment, the hinge axis 313 of the first hinge 31 and the hinge axis 313 of the second hinge 32 are not arranged vertically, but the hinge axis formed by the two hinges is gradually inclined from bottom to top towards the front of the vehicle. This can decompose the weight of the door body 1 (including the load of the spare tire 2, the rear window, etc.) into an axial component along the hinge axis and a radial component perpendicular to the hinge axis. The axial component can transfer most of the load of the door body 1 to the vehicle body, reducing the bending deformation of the door body 1 itself; the radial component makes the door body 1 tend to conform to the vehicle body inward and downward around the hinge axis, which can counteract the outward tilting tendency of the door body 1 and reduce the local stress on the hinge mounting surface.

[0054] On the other hand, the inclined setting of the hinge axis causes the door body 1 to rotate outward and rise slightly when the tailgate is opened; when closed, the door body 1 tends to automatically conform to the body under the assistance of the radial component of gravity, thereby improving the movement trajectory of the door body 1 when opening and closing and improving the usability of the side-opening tailgate.

[0055] In this embodiment, "inner" refers to the side facing the interior space of the vehicle body, and "outer" refers to the side facing away from the vehicle body.

[0056] Specifically, the hinge axis is tilted forward at an angle of 3°-4°, preferably 3.5°, which can optimize the force-bearing posture of the door body 1 and help improve the anti-sagging performance.

[0057] See some possible embodiments. Figure 3 The door body 1 has an outward-facing clearance notch 12 on the side edge of the first side. The clearance notch 12 is provided through the thickness direction of the door body 1. The hinge shaft 313 is provided in the clearance notch 12 so that the hinge shaft 313 is located close to the edge of the first side of the door body 1.

[0058] During the opening and closing of a side-opening tailgate, the position of the hinge shaft 313 directly affects the movement trajectory of the door body 1 and the gap between the door body 1 and surrounding components (such as the vehicle body side panel). If the hinge shaft 313 is located on the outside of the door body 1, it will directly affect the overall aesthetics of the tailgate; if the hinge shaft 313 is located on the inside of the door body 1, it will increase the movement radius of the first side edge of the door body 1, which may easily cause interference between the side edge of the door body 1 and the vehicle body side panel when opening and closing the door body 1.

[0059] In this embodiment, "outer" refers to the side of the door 1 that is far from the vertical center line (Y0 line) in the left-right direction, and "inner" refers to the side of the door 1 that is close to the vertical center line in the left-right direction.

[0060] The setting of the clearance notch 12 allows the hinge pivot 313 to be as close as possible to the side edge of the door body 1, thereby reducing the movement radius of the side edge of the door body 1 and preventing the side edge of the door body 1 from getting stuck in the side wall of the vehicle body when the door body 1 is opened, thus ensuring the smooth opening and closing of the tailgate; at the same time, it effectively solves the problem that the door body 1 cannot be opened due to ice forming in the water channel of the side wall of the vehicle body in rainy, snowy and extremely cold weather.

[0061] Furthermore, both the first hinge 31 and the second hinge 32 are provided with over-opening limit structures, so that the door 1 maintains a gap of not less than 3mm with the peripheral parts of the vehicle body during the process of opening the door body 1 around the hinge axis to the maximum angle.

[0062] In some embodiments, see Figure 1 The door body 1 is also provided with a locking fastener 4, which is used to lock and connect with the vehicle body. The locking fastener 4 is located on the second side of the door body 1, which is opposite to the first side of the door body 1. The locking fastener 4 is horizontally aligned with the center of gravity of the door body 1 and is not higher than the top surface of the first hinge 31.

[0063] It should be noted that, in this embodiment, the second side of the door 1 refers to the other side that is opposite to the first side of the door 1. The first side of the door 1 is defined as the left side, and the second side of the door 1 is defined as the right side.

[0064] The latch 4 is the connection point between the door 1 and the vehicle body on the second side when the door body 1 is in the closed state. If the latch 4 is too high, it will cause the door body 1 to sag. If the latch 4 is too low, it will cause the door body 1 to shake when it is opened.

[0065] The center of mass of the door body 1 is the average center point of the mass distribution of the door body 1. By making the position of the latch 4 correspond horizontally to the center of mass of the door body 1 and not higher than the top surface of the first hinge 31, it can form a stable triangular support structure with the first hinge 31 and the second hinge 32, which improves the support stiffness of the door body 1 and can effectively suppress the left and right swaying of the door body 1 under bumpy road conditions.

[0066] Based on the above embodiments, see Figure 4 The force transmission cavity 111 is also provided with a reinforcing plate 15, which is supported and connected between the left and right side walls of the force transmission cavity 111.

[0067] The reinforcing plate 15 connects the two side walls of the force transmission cavity 111, which is equivalent to adding a transverse support frame inside the hollow force transmission cavity 111. This directly improves the bending and shear resistance of the side frame of the window frame 11 in the left and right directions, reduces the risk of cracking of the side frame, and helps to improve the overall rigidity of the door 1.

[0068] Meanwhile, the force transmission cavity 111 with the reinforcing plate 15 enables the hinge force transmission channel to transmit and distribute the load at the hinge assembly 3 more stably and reliably, significantly improving the structural stability of the door 1 under bumpy road conditions, and is especially suitable for large-sized back doors.

[0069] Specifically, the reinforcing plate 15 is a plate-shaped member extending in the vertical direction, with its two sides connected to the left and right sides of the force transmission cavity 111, respectively. The middle part can be provided with an arc-shaped protrusion protruding in the forward and backward direction, which helps to further increase the rigidity of the reinforcing plate 15.

[0070] In some embodiments, the door body 1 may be adopted as follows: Figure 1 , Figure 4 and Figure 5 The structure shown. See also Figure 1 , Figure 4 and Figure 5 The door body 1 includes an inner door panel 13 and an outer door panel 14 that are connected to each other. A force transmission cavity 111 is formed between the inner door panel 13 and the outer door panel 14. An installation cavity 16 is also formed below the window frame 11. The first hinge plate 311 and the fastener 4 are both connected to the inner door panel 13. The spare tire 2 is connected to the outer door panel 14. The first hinge plate 311, the fastener 4 and the spare tire 2 all correspond to the installation cavity 16. The lower part of the reinforcing plate 15 extends downward into the installation cavity 16 and forms a bent part 151 that fits against the inner door panel 13. The first hinge plate 311 is stacked and connected with the inner door panel 13 and the bent part 151.

[0071] A mounting cavity 16 is provided between the inner door panel 13 and the outer door panel 14, located below the window frame 11. This cavity can be used to accommodate and fix various mechanical or electronic components related to the door 1, such as door lock mechanisms, window regulators, wiring harnesses, sound insulation cotton, and anti-collision beams. The first hinge plates 311 of the first hinge 31 and the second hinge 32 are both bolted to the inner door panel 13, corresponding to the left side of the mounting cavity 16. The latch 4 is connected to the inner side of the inner door panel 13, corresponding to the right side of the mounting cavity 16. The spare tire 2 is connected to the rear side of the rear door panel via a connecting bracket, corresponding to the rear side of the mounting cavity 16. This arrangement improves the overall space utilization efficiency of the rear door and optimizes the spatial layout.

[0072] The lower part of the reinforcing plate 15 extends to the mounting cavity 16, so that the window frame 11 and the lower part of the door body 1 form a through longitudinal support structure, and the force transmission cavity 111 and the hinge mounting surface correspond to form a smoother hinge force transmission channel, ensuring that the load at the hinge assembly 3 is reliably transmitted, improving the overall performance of the door body 1, and reducing the occurrence of vibration and abnormal noise.

[0073] The lower part of the reinforcing plate 15 extends downward and gradually approaches one side of the inner door panel 13. The lower part of the reinforcing plate 15 is horizontally folded backward to form a bending part 151. The bending part 151 fits against the inner wall of the inner door panel 13. The setting of the bending part 151 enhances the rigidity of the hinge mounting surface, improves the shear strength of the hinge mounting surface, avoids plastic deformation or tearing of the inner door panel 13, and reduces the occurrence of the rear door sagging due to loosening of the hinge assembly 3.

[0074] See some possible embodiments. Figure 2 A buffer block 5 is provided on the upper part of the second side of the door body 1. The buffer block 5 has a compression deformation amount for pressing against the rear wall of the vehicle body. The compression deformation amount is 2mm-4mm, such as 2.5mm or 3mm.

[0075] The compression deformation of the buffer block 5 is set to 2mm-4mm. When the door 1 is closed and locked to the vehicle body through the latch 4, the buffer block 5 will be squeezed and deformed by 2mm-4mm, so that the buffer block 5 is tightly pressed against the rear wall of the vehicle body, filling the small gap between the door 1 and the vehicle body, effectively limiting the small shaking of the door 1 during vehicle operation, and reducing the risk of abnormal noise on bumpy road sections.

[0076] The compression deformation is preferably 3mm, which can effectively maintain the stability of the door 1 after it is closed.

[0077] Based on the same inventive concept, this application also provides a vehicle including the aforementioned side-opening tailgate assembly.

[0078] Compared with the prior art, the vehicle provided by this utility model has a side-opening rear door assembly in which the force transmission cavity 111 located on the first side of the window frame 11 near the door body 1 corresponds vertically with the hinge assembly 3, forming a vertically connected hinge force transmission channel. This allows the load borne by the hinge assembly 3 to be more smoothly distributed to the entire area of ​​the window frame 11 and the door body 1 frame through the hinge force transmission channel, optimizing the force distribution of the hinge assembly 3, reducing the risk of local overload, helping to enhance the overall rigidity of the door body 1, effectively solving the sagging problem caused by the force transmission defects of the existing side-opening rear door, avoiding the generation of additional vibration and abnormal noise, and significantly improving the driving quality of the vehicle.

[0079] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A side-opening back door assembly characterized by, include: A door (1) has a window frame (11) formed on its upper part and a spare tire (2) is provided at the rear of the door (1). as well as A hinge assembly (3) is connected to the first side of the door body (1), and the connection surface between the door body (1) and the hinge assembly (3) is the hinge mounting surface; The window frame (11) forms a hollow force transmission cavity (111) in the frame of the first side of the door body (1). The force transmission cavity (111) extends in the vertical direction and corresponds to the hinge mounting surface to form a hinge force transmission channel.

2. The side-opening rear tailgate assembly as described in claim 1, characterized in that, The spare tire (2) is located on the first side of the door body (1), and the horizontal distance between the center of the spare tire (2) and the vertical center line of the door body (1) is not less than 60mm.

3. A side-opening back door assembly as in claim 1, wherein, The hinge assembly (3) includes a first hinge (31) and a second hinge (32) spaced apart in the vertical direction, with the second hinge (32) located below the first hinge (31). The distance between the first hinge (31) and the second hinge (32) is defined as L1, the distance from the top surface of the first hinge (31) to the lower edge of the door body (1) is defined as L2, and the height of the door body (1) is defined as L3, wherein L1 / L3≥0.4 and L2 / L3≥0.

5.

4. A side-opening back door assembly according to claim 3, wherein Both the first hinge (31) and the second hinge (32) include: The first hinge plate (311) is connected to the door body (1). The surface of the door body (1) connected to the first hinge plate (311) is the hinge mounting surface. The hinge mounting surface is set at an angle to the left and right directions. The second hinge plate (312) is used to connect to the vehicle body; and A hinge shaft (313) is provided, through which the first hinge plate (311) and the second hinge plate (312) are hinged; The hinge axis (313) of the first hinge (31) and the hinge axis (313) of the second hinge (32) are collinear to form a hinge axis, which is gradually inclined forward from bottom to top.

5. A side-opening back door assembly according to claim 4, wherein The door body (1) has an outward-facing clearance notch (12) on the side edge of the first side. The clearance notch (12) is provided through the thickness direction of the door body (1). The hinge shaft (313) is provided in the clearance notch (12) so that the hinge shaft (313) is located close to the edge of the first side of the door body (1).

6. A side-opening back door assembly as in claim 4, wherein, The door body (1) is also provided with a locking fastener (4), which is used to lock and connect with the vehicle body. The locking fastener (4) is located on the second side of the door body (1), and the second side of the door body (1) is opposite to the first side of the door body (1). The locking fastener (4) is horizontally aligned with the center of gravity of the door body (1) and is not higher than the top surface of the first hinge (31).

7. A side-opening back door assembly according to claim 6, wherein The force transmission cavity (111) is also provided with a reinforcing plate (15), which is supported and connected between the left and right side walls of the force transmission cavity (111).

8. A side-opening back door assembly according to claim 7, wherein The door body (1) includes an inner door panel (13) and an outer door panel (14) connected to each other. The force transmission cavity (111) is formed between the inner door panel (13) and the outer door panel (14), and an installation cavity (16) is also formed below the window frame (11). The first hinge plate (311) and the latch (4) are both connected to the inner door panel (13), and the spare tire (2) is connected to the outer door panel (14). The first hinge plate (311), the latch (4) and the spare tire (2) all correspond to the mounting cavity (16). The lower part of the reinforcing plate (15) extends downward into the mounting cavity (16) and forms a bent portion (151) that fits against the inner door panel (13). The first hinge plate (311) is stacked and connected with the inner door panel (13) and the bent portion (151).

9. A side-opening back door assembly as in claim 1, wherein, A buffer block (5) is provided above the second side of the door body (1). The buffer block (5) has a compression deformation amount for pressing against the rear wall of the vehicle body, and the compression deformation amount is 2mm-4mm.

10. Vehicle, characterized in that Including a side-opening rear tailgate assembly as described in any one of claims 1-9.

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