Earth door opening and closing device and vehicle

Abstract

The present application relates to the technical field of vehicles, in particular to a ground door opening and closing device and a vehicle. The ground door opening and closing device comprises a ground door assembly and a ground door hinge, the ground door assembly is connected with two rear longitudinal beams of the vehicle through the ground door hinge, and the ground door assembly comprises a ground door cover body and a rear crash beam which are fixedly connected as a whole. Compared with the prior art, the ground door opening and closing device has the following advantages: the rear crash beam acts as a structural reinforcing component of the ground door assembly, thereby ensuring the structural strength and safety performance of the ground door assembly and reducing the overall weight of the vehicle; since the height of the ground door assembly is not constrained by the position of the rear crash beam, the ground door assembly has a very low ground clearance after being opened, thereby being more convenient for users to use; and the ground door assembly has a larger load bearing area after being opened.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a ground door opening and closing device and a vehicle. Background Technology

[0002] Traditional vehicle models use a lift-up tailgate design for their rear opening mechanism. However, with the diversification of automotive usage scenarios (such as outdoor recreation and camping), an increasing number of SUVs and MPVs are adopting a split-door design for their rear opening mechanism. While the existing split-door design improves loading convenience, it still has significant limitations in special usage scenarios (such as when the tailgate needs to be as close to the ground as possible or when heavy loads are required). Summary of the Invention

[0003] The first objective of this invention is to provide a ground door opening and closing device to solve the technical problems of the ground door being too high off the ground after opening and having low structural strength in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A ground door opening and closing device includes a ground door assembly and a ground door hinge. The ground door assembly is connected to two rear longitudinal beams of a vehicle via the ground door hinges. The ground door assembly includes a ground door cover and a rear anti-collision beam that are fixedly connected as one unit.

[0006] In some embodiments, the door cover has a first surface facing the vehicle's trunk when the door assembly is in a closed state, the first surface having an opening, the rear bumper beam being disposed within the door cover, and the door assembly further including an interior trim pad laid at the opening of the door cover.

[0007] In some embodiments, the interior trim panel includes a first panel and a second panel, the first panel being embedded on the first surface, and the first panel being flexibly connected to the side edge of the second panel near the door hinge.

[0008] In some embodiments, the ground door cover body and the rear anti-collision beam are connected by screws and / or welding;

[0009] And / or, a gap is formed between the ground door cover and the rear anti-collision beam, and a buffer energy-absorbing layer is provided in the gap;

[0010] And / or, the rear anti-collision beam is made of carbon fiber composite material or aluminum alloy material.

[0011] In some embodiments, the ground door assembly further includes two sets of energy-absorbing components respectively disposed at both ends of the rear anti-collision beam;

[0012] Each energy-absorbing assembly includes an energy-absorbing box and a first connecting plate. One end of the energy-absorbing box is connected to the rear anti-collision beam, and the other end of the energy-absorbing box extends from the ground door cover and is connected to the first connecting plate. The first connecting plate is configured to engage with the rear longitudinal beam on the same side when the ground door assembly is in the closed state.

[0013] In some embodiments, the door cover has a second surface facing away from the vehicle's trunk when the door assembly is in the closed state, and the second surface is provided with a first mounting structure for mounting a license plate.

[0014] And / or, the ground door opening and closing device further includes a function expansion module, and the inner side of the ground door cover is provided with a second mounting structure for installing the function expansion module;

[0015] And / or, ground door latches are respectively installed on the left and right side walls of the ground door cover;

[0016] And / or, the side of the ground door cover away from the ground door hinge is equipped with a sky door latch or sky door lock body for locking the sky door assembly of the vehicle.

[0017] In some embodiments, a function expansion module is also included on the ground door assembly, the function expansion module including one or more of a power interface, a light, an audio device, a cigarette lighter, and a wireless charger.

[0018] In some embodiments, an actuator is also included, connected between the vehicle body and the door assembly, and configured to drive the door assembly to rotate and open relative to the vehicle body.

[0019] And / or, it also includes a limiting mechanism, the limiting mechanism comprising a sleeve and a cable, the sleeve being mounted on the ground door assembly, one end of the cable being located inside the sleeve and extending and retracting within the sleeve, and the other end of the cable extending out from the sleeve and connected to the rear side panel of the vehicle.

[0020] In some embodiments, the actuator is an electric push rod, and the two ends of the actuator are respectively hinged to one of the rear longitudinal beams and the rear anti-collision beam.

[0021] A second object of the present invention is to provide a vehicle comprising the ground door opening and closing device described in any of the preceding claims.

[0022] The beneficial effects of this invention are:

[0023] The present invention provides a ground door opening and closing device and a vehicle having the ground door opening and closing device. The ground door opening and closing device includes a ground door assembly and a ground door hinge. The ground door assembly is connected to two rear longitudinal beams of the vehicle through the ground door hinges. The ground door assembly includes a ground door cover and a rear anti-collision beam fixedly connected as one unit.

[0024] Compared to existing technologies, the advantages of this ground door opening and closing device are as follows: the rear bumper beam acts as a structural reinforcement component of the ground door assembly, ensuring the structural strength and safety performance of the ground door assembly, while reducing the overall weight of the vehicle; the height of the ground door assembly is not constrained by the position of the rear bumper beam, and the ground door assembly is very low to the ground after opening, making it more convenient for users to use; the ground door assembly has a larger load-bearing area after opening. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the assembly of the ground door opening and closing device with the rear longitudinal beam in the closed state of the ground door assembly, according to Embodiment 1 of the present invention.

[0027] Figure 2 This is an exploded view of the ground door opening and closing device provided in Embodiment 1 of the present invention;

[0028] Figure 3 This is a three-dimensional schematic diagram of the rear anti-collision beam provided in Embodiment 1 of the present invention;

[0029] Figure 4 This is a three-dimensional schematic diagram of the ground door assembly provided in Embodiment 1 of the present invention;

[0030] Figure 5 This is a three-dimensional schematic diagram of the ground door cover provided in Embodiment 1 of the present invention;

[0031] Figure 6 This is a three-dimensional schematic diagram of the ground door cover provided in Embodiment 2 of the present invention;

[0032] Figure 7 This is a schematic diagram showing the position of the ground door assembly relative to the bottom surface of the vehicle trunk when it is opened, according to Embodiment 3 of the present invention.

[0033] Figure 8 This is a schematic diagram showing the connection between the ground door assembly and the rear longitudinal beam according to Embodiment 4 of the present invention;

[0034] Figure 9This is a schematic diagram of the movement of the ground door assembly relative to the rear longitudinal beam provided in Embodiment 4 of the present invention;

[0035] Figure 10 This is a partial schematic diagram of a vehicle with the top and bottom doors closed, as provided in Embodiment 5 of the present invention;

[0036] Figure 11 This is a partial schematic diagram of a vehicle with its top and bottom doors open, as provided in Embodiment 5 of the present invention.

[0037] icon:

[0038] 1-Ground door assembly; 11-Ground door cover; 111-First mounting structure; 112-Second mounting structure; 113-Third mounting structure; 114-Ground door control button through hole; 115-Avoidance hole; 12-Rear bumper beam; 121-Fourth mounting structure; 122-Fifth mounting structure; 13-Interior trim panel; 14-Energy absorption box; 15-First connecting plate; 16-Ground door latch; 17-Head door latch; 18-Head door lock body;

[0039] 2-Ground door hinge;

[0040] 3-Actuator; 31-Gate opening / closing motor; 32-Push rod; 33-Fixed base;

[0041] 4-Limiting mechanism; 41-Sleeve; 42-Cable;

[0042] 100 - Rear longitudinal beam;

[0043] 200-Tianmen Assembly;

[0044] 300 - Second connecting plate; 310 - Hinge mounting structure; 320 - Docking groove; 330 - Flanged structure. Detailed Implementation

[0045] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0046] It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] It should be noted that in the description of this invention, the terms "connection" and "installation" 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 direct connection or a connection through an intermediate medium; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] Example 1

[0049] In existing technologies, the height of the top surface of a door after it is opened (i.e., the top surface of the door) from the ground is generally above 600mm. This height is unsuitable for use as a seat (standard seat height is 400-450mm) and also cannot serve as a stable storage platform. Secondly, excessively high doors are extremely inconvenient for children, the elderly, and smaller users, requiring them to tiptoe or bend over to operate, posing a safety hazard. Furthermore, in scenarios such as off-road camping and water fishing, users often require a flat platform close to the ground to place fishing gear, cooking utensils, or other equipment, a need that traditional structures cannot meet.

[0050] Based on the aforementioned problems with existing technologies, and referring to... Figure 1 and Figure 2 (To facilitate viewing the internal structure of the ground door assembly 1, Figure 1 (The cover structure of the ground door assembly 1 has been removed). The ground door opening and closing device provided in this application includes a ground door assembly 1 and a ground door hinge 2. The ground door assembly 1 is connected to the two rear longitudinal beams 100 of the vehicle through the ground door hinge 2. The ground door assembly 1 includes a ground door cover 11 and a rear anti-collision beam 12 that are fixedly connected as one unit.

[0051] The main function of the rear bumper beam 12 is to absorb energy and disperse collision force in low-speed rear-end collisions. In existing vehicles, the rear bumper beam 12 is fixed between the rear ends of the two rear longitudinal beams 100 with screws. Unlike the prior art, this application integrates the rear bumper beam 12 into the door. The advantages of this arrangement are: (1) The rear bumper beam 12 acts as a structural reinforcement component of the door assembly 1, eliminating the need for the original structural reinforcement component of the door assembly 1, thereby ensuring the structural strength and safety performance of the door assembly 1, while reducing the overall weight of the vehicle; (2) The door device of conventional vehicles is installed above the rear bumper beam 12, while this application integrates the rear bumper beam 12 into the door assembly 1, so that the height of the door assembly 1 is not affected by the rear bumper beam 12. The position constraint of the impact beam 12 allows the ground door assembly 1 to move downward, thereby reducing the ground door assembly 1's height above the ground after opening, making the ground door assembly 1 suitable for more usage scenarios (such as outdoor camping, fishing, children climbing and sitting); (3) The width of the ground door assembly 1 can be designed to be wider than traditional ones, making the load-bearing area of ​​the ground door assembly 1 larger after opening; (4) The ground door assembly 1 is connected to the two rear longitudinal beams 100 through the ground door hinge 2, so that the rear anti-collision beam 12 can transfer the collision force to the rear longitudinal beams 100 when it is hit.

[0052] The ground door assembly 1 in this application has a bearing surface height between 300mm and 500mm from the ground after opening, which is at least 15% lower than the prior art. This height can be adjusted according to the vehicle configuration; for example, the height can be any value among 300mm, 350mm, 400mm, 450mm, and 500mm.

[0053] Optionally, the gate housing 11 and the rear bumper beam 12 are connected by screws and / or welding. A detachable connection method using screws is preferred for the gate housing 11 and the rear bumper beam 12 to facilitate disassembly and maintenance of the gate opening and closing device. The rear bumper beam 12 can be made of carbon fiber composite material or aluminum alloy to achieve a lightweight effect.

[0054] In some embodiments, a gap is formed between the door cover 11 and the rear bumper beam 12, and a buffer energy-absorbing layer is disposed within the gap. The buffer energy-absorbing layer covers the outer side of the rear bumper beam 12 (the outer side of the rear bumper beam 12 refers to the side of the door assembly 1 facing away from the vehicle trunk when it is closed), and fills the gap between the door cover 11 and the rear bumper beam 12. The buffer energy-absorbing layer includes one or more of EPP rigid foam, EPS foam, and rubber buffer blocks, which can perform functions such as energy absorption and sound insulation.

[0055] Analysis of the above structure shows that the ground door assembly 1 also integrates the vehicle's rear bumper. The rear bumper typically includes an outer cover (i.e., the ground door cover 11) and a buffer energy-absorbing layer disposed inside the outer cover, which wraps around the outside of the rear anti-collision beam 12. Referring to the existing rear bumper composition structure, the ground door cover 11 in this embodiment can also be equipped with accessories such as reflectors and radar sensors.

[0056] In some embodiments, ground door latches 16 are respectively installed on the left and right side walls of the ground door cover 11, and correspondingly, a ground door lock body adapted to the ground door latches 16 is installed on the rear side panel of the vehicle body. The ground door lock body and the ground door latches 16 can lock the ground door assembly 1 in the closed state. The ground door latches 16 can be hidden in a recess, or they can be covered by a barrier on the outer edge of the ground door cover 11. The barrier can be detachably fixed to the ground door cover 11 with screws, or it can be integrally formed with a wall panel of the ground door cover 11 away from its opening, or it can be welded to the ground door cover 11.

[0057] In some embodiments, a door latch 17 or a door lock body 18 for locking the door assembly 200 of the vehicle is installed on the side of the door cover 11 away from the door hinge 2. One of the door latch 17 and the door lock body 18 is installed on the door cover 11, and the other is installed on the door assembly 200; the two cooperate to lock the door assembly 200 in the closed state. Figure 5 In this embodiment, the ground door cover 11 is provided with a third mounting structure 113 for fixing the top door latch 17. The third mounting structure 113 includes a latch mounting groove and a screw connection hole. The top door latch 17 is mounted on the third mounting structure 113 by screws, and the top door latch 17 is hidden in the latch mounting groove. The top door lock body 18 is mounted on the top door assembly 200.

[0058] The structures of ground door locks and top door locks are similar. The lock body mainly consists of a mechanical locking system and an electronic control system. The mechanical locking system works with the latch to achieve physical locking. The electronic control system includes a control unit, a door lock actuator, a position sensor, a triggering device, etc. Users can issue lock or unlock commands through a remote key or by pressing the lock body control button. After receiving the command, the door lock actuator performs the corresponding action to lock or unlock the lock body and the latch.

[0059] Continue to refer to Figure 1 and Figure 2The door opening and closing device also includes an actuator 3, which is connected between the vehicle body and the door assembly 1. The actuator 3 is configured to drive the door assembly 1 to rotate and open relative to the vehicle body. The actuator 3 can be connected between the rear side panel (or floor) of the vehicle body and the door assembly 1, or it can be connected between the rear longitudinal beam 100 and the door assembly 1. There can be one or more actuators 3; if the actuator 3 primarily performs the opening and closing function, there can be one actuator 3; if the actuator 3 also needs to perform some or all of the support function, the number of actuators 3 is preferably at least two.

[0060] In this embodiment, the actuator 3 is an electric push rod. Both ends of the actuator 3 are hinged to one of the rear longitudinal beams 100 and the rear anti-collision beam 12, respectively. This arrangement strengthens the connection between the rear longitudinal beam 100 and the rear anti-collision beam 12. Specifically, the actuator 3 includes a door opening / closing motor 31, a push rod 32, and a fixed base 33. One end of the push rod 32 is located inside the fixed base 33, and the other end extends out of the fixed base. The body of the door opening / closing motor 31 is mounted on the fixed base 33, and its output shaft is connected to the push rod 32. The door opening / closing motor 31 can drive the push rod 32 to extend and retract relative to the fixed base 33. The opposite ends of the fixed base 33 and the push rod 32 are respectively hinged to one of the rear longitudinal beams 100 and the rear anti-collision beam 12 via rotating shafts.

[0061] Based on the above structure, referring to Figure 3 The rear bumper beam 12 is provided with a fourth mounting structure 121 for hinged connection with the actuator 3. The fourth mounting structure 121 can be fixed to the rear bumper beam 12 by welding or screw connection, and is provided with a hinge hole adapted to the rotating shaft at the end of the mounting base 33. Similarly, the rear longitudinal beam 100 is also provided with a sixth mounting structure for hinged connection with the actuator 3.

[0062] Reference Figure 4 Since one end of the actuator 3 needs to extend from inside the ground door cover 11, a clearance hole 115 is provided on the ground door cover 11 corresponding to the position of the actuator 3. This clearance hole 115 serves not only to allow passage for the actuator 3 but also as a wiring hole. The wiring harnesses of the electronic components located inside the ground door cover 11 converge, pass through the clearance hole 115, and connect to the vehicle's control system.

[0063] Reference Figure 5The outer surface of the ground door cover 11 is also provided with a ground door control button through hole 114. The ground door opening and closing controller is installed inside the ground door cover 11, and the button on the ground door opening and closing controller is exposed through the ground door control button through hole 114. When it is necessary to open the ground door assembly 1, the user presses the button at the ground door control button through hole 114 to control the ground door lock body to perform the unlocking action, and at the same time controls the action actuator 3 to start and push the ground door assembly 1 to open.

[0064] Continue to refer to Figure 1 and Figure 2 To enhance the load-bearing capacity of the door assembly 1, the door opening and closing device also includes a limiting mechanism 4. In this embodiment, the limiting mechanism 4 is specifically a cable mechanism, comprising a sleeve 41 and a cable 42. The sleeve 41 is mounted on the door assembly 1, one end of the cable 42 is located within the sleeve 41 and extends and retracts within it, while the other end extends from the sleeve 41 and is connected to the rear side panel of the vehicle. The limiting mechanism 4 also includes a spring (generally a tension spring) placed within the sleeve 41 and connected to the cable 42. The spring within the sleeve 41 can pull the cable 42 back when the door assembly 1 is closed. When the door assembly 1 is closed, the spring within the sleeve 41 is in a contracted state, and the cable 42 retracts relative to the sleeve 41 under the tension of the spring. When the door assembly 1 is open, the spring within the sleeve 41 is in a stretched state, and the cable 42 extends relative to the sleeve 41, thus limiting the door assembly 1. The mechanical limiting angle of the ground door hinge 2 should be about 3° greater than the limiting angle of the cable 42, so as to prevent the ground door assembly 1 from failing to rotate into place.

[0065] The number of limiting mechanisms 4 is at least two, and is generally even; for example, the number of limiting mechanisms 4 may be two, four, or six. At least one limiting mechanism 4 is provided on each of the left and right sides of the floor door assembly 1. The number of limiting mechanisms 4 can be increased or decreased according to the rated load-bearing capacity and width of the floor door assembly 1. The rated load-bearing capacity of the floor door assembly 1 can also be increased by adding hinges to the floor section of the vehicle body and the middle of the floor door assembly 1.

[0066] In this embodiment, there are two limiting mechanisms 4. Two sleeves 41 are symmetrically installed on the left and right sides of the rear bumper beam 12. One end of each of the two cables 42 passes through the left and right side walls of the door cover 11 and is fixed to the rear side panel of the vehicle body. (Refer to...) Figure 3 In order to install the limiting mechanism 4, a fifth mounting structure 122 is also provided on the rear anti-collision beam 12. The fifth mounting structure 122 can be one or a combination of screw connection hole and limiting groove. The sleeve 41 is fixed to the rear anti-collision beam 12 by screw connection and / or embedding.

[0067] In some other embodiments, the actuator 3 can be an intelligent sensor-type telescopic strut, which can automatically adjust its supporting force according to the load, thereby both driving the door assembly 1 to open and close, and supporting and limiting the door assembly 1 after it is opened. In this embodiment, the limiting mechanism 4 can be omitted. In addition, the actuator 3 can also be a hydraulic push rod, which has a higher supporting capacity than an electric push rod.

[0068] Reference Figure 4 The door cover 11 has a first surface facing the vehicle's trunk when the door assembly 1 is closed. An opening is provided on the first surface. The rear bumper beam 12 is housed within the door cover 11. The door assembly 1 also includes an interior trim pad 13 laid at the opening of the door cover 11. The interior trim pad 13 serves two functions: covering the door cover 11 and acting as a support pad. The interior trim pad 13 can be fixed to the door assembly 1 by screws, snap-fits, or other means. To enhance the load-bearing capacity of the interior trim pad 13, it abuts against the rear bumper beam 12, with the rear bumper beam 12 providing support for the interior trim pad 13.

[0069] Continue to refer to Figure 4 In this embodiment, the ground door cover 11 also has a third surface located at its bottom when the ground door assembly 1 is in the closed state. The third surface is machined with hinge screw through holes for connecting the ground door hinge 2. The rear bumper beam 12 has screw connection holes at positions corresponding to each hinge screw through hole. One blade of the ground door hinge 2 is fixedly mounted on the third surface and connected to the rear bumper beam 12 by screws. In other embodiments, one blade of the ground door hinge 2 can also extend into the interior of the ground door cover 11 and be fixed to the rear bumper beam 12.

[0070] According to the principle of mechanical transmission, the lower the position of the door hinge 2, the closer the bearing surface of the door assembly 1 is to the ground after it is opened; the further out the position of the hinge axis of the door hinge 2 is relative to the trunk, the greater the extension width of the door assembly 1 relative to the vehicle body after it is opened. In this embodiment, in order to increase the extension width of the door assembly 1, the hinge axis of the door hinge 2 is set near the second surface of the door cover 11 (the second surface refers to the side of the door cover 11 facing away from the vehicle trunk when the door assembly 1 is closed), and the door cover 11 is provided with a barrier to cover the door hinge 2.

[0071] Reference Figure 5In this embodiment, the door cover 11 has a second surface facing away from the vehicle's trunk when the door assembly 1 is closed. A first mounting structure 111 for mounting a license plate is provided on the second surface. The first mounting structure 111 includes a boss on the second surface and screw connection holes (generally four) on the boss. The license plate is fixed to the first mounting structure 111 by screws.

[0072] As described above, this embodiment integrates the ground door cover 11, the rear anti-collision beam 12, the rear bumper, and the license plate into one unit. The rear anti-collision beam 12 can improve the structural strength and safety performance of the ground door assembly 1, thereby giving the ground door assembly 1 better load-bearing capacity and anti-collision performance. Furthermore, the height of the ground door assembly 1 is not constrained by the position of the rear anti-collision beam 12. When the ground door assembly 1 is opened, its load-bearing surface is very low to the ground, which expands the usage scenarios of the ground door and makes it more convenient for users to use.

[0073] Example 2

[0074] This embodiment is an extension of Embodiment 1. In this embodiment, the door opening and closing device further includes a functional expansion module installed on the door assembly 1. The functional expansion module includes one or more of the following: a power interface, a light, a sound system, a cigarette lighter, and a wireless charger. Of course, the functional expansion module is not limited to the above-described configuration; it can be customized according to user needs to meet the usage requirements of different users.

[0075] Reference Figure 6 The inner side of the door cover 11 is provided with a second mounting structure 112 for installing the functional expansion module. The second mounting structure 112 is a mounting boss provided inside the door cover 11. The mounting boss can be machined with screw connection holes, slots, and other structures. In this embodiment, a notch needs to be machined in the interior trim pad 13 to avoid the functional expansion module.

[0076] Example 3

[0077] This embodiment is an extension based on any of the above embodiments. (Refer to...) Figure 7 In this embodiment, the interior mat 13 is a double-layer folding panel, which includes a first panel and a second panel. The first panel is embedded on the first surface, and the first panel and the second panel are flexibly connected to the side edge of the door hinge 2.

[0078] The above-mentioned arrangement can utilize the second plate to cover the gap between the ground door assembly 1 and the trunk floor after the ground door assembly 1 is opened. In addition, in this application, the load-bearing surface of the ground door assembly 1 after opening is arranged in a stepped manner with the bottom surface of the trunk (in the prior art, the load-bearing surface of the ground door after opening is generally coplanar with the bottom surface of the trunk), and this height gradient allows the second plate to be used for the user to lean against.

[0079] Furthermore, the interior trim pad 13 is made of one or more of the following materials: plastic, leather, fabric, and sponge. For example, the interior trim pad 13 includes two plastic panels, each covered with a leather sleeve, and the two leather sleeves are connected on one side. The plastic panels provide some support for the interior trim pad 13, while the leather sleeves enhance its tactile feel. A thin layer of sponge padding can also be placed between the leather sleeve and the plastic panels to make sitting or leaning more comfortable for the user.

[0080] Optionally, the second panel is connected to the trunk floor via snaps, ropes, etc., so that the second panel automatically overlaps the trunk floor after the door assembly 1 is opened; and / or, matching snap buttons and snap buttons are respectively provided on the separating edges of the first and second panels, which can be selectively unfolded or folded. The door opening and closing device can also be equipped with an inflatable air cushion that can be placed on the bearing surface of the door assembly 1, the thickness of which after inflation is approximately equal to the height difference between the bearing surface of the door assembly 1 and the trunk floor after opening.

[0081] Example 4

[0082] This embodiment is an extension based on any of the above embodiments. (Refer to...) Figure 8 and Figure 9 In this embodiment, the ground door assembly 1 further includes two sets of energy-absorbing components respectively disposed at both ends of the rear anti-collision beam 12; each set of energy-absorbing components includes an energy-absorbing box 14 and a first connecting plate 15. One end of the energy-absorbing box 14 is connected to the rear anti-collision beam 12, and the other end of the energy-absorbing box 14 extends from the ground door cover 11 and is connected to the first connecting plate 15. The first connecting plate 15 is configured to engage with the rear longitudinal beam 100 on the same side when the ground door assembly 1 is in the closed state. In this embodiment, a notch needs to be machined in the interior mat 13 to avoid the energy-absorbing box 14. To improve the aesthetics of the ground door assembly 1, a decorative sleeve is wrapped around the outside of the energy-absorbing box 14.

[0083] The function of the energy-absorbing box 14 is to controllably collapse and absorb energy, disperse impact force, and protect the core structure of the vehicle body. It can evenly distribute the impact force transmitted from the rear anti-collision beam 12 to the rear longitudinal beam 100. The main structure of the energy-absorbing box 14 is generally a profile with single or multiple cavities. Common cross-sectional shapes of the main structure include polygons such as rectangles, hexagons, and octagons. The surface of the main structure is provided with collapsible guide grooves, ridges, and other guide structures. These guide structures can guide the energy-absorbing box 14 to wrinkle and deform when subjected to a large impact. Each energy-absorbing assembly can have one or two energy-absorbing boxes 14. The structure of the energy-absorbing box 14 is the same as that of the prior art and will not be described in detail here.

[0084] Specifically, one end of the energy-absorbing box 14 is fixed to one end of the rear anti-collision beam 12 by welding or screws. A through groove for the sleeve 41 of the avoidance limiting mechanism 4 is reserved on the root of the energy-absorbing box 14 near the rear anti-collision beam 12. The other end of the energy-absorbing box 14 passes through the ground door cover 11 and a first connecting plate 15 is welded on it. A second connecting plate 300 is welded on the rear end of each rear longitudinal beam 100. The second connecting plate 300 is provided with a hinge mounting structure 310 and a docking groove 320. One leaf of the ground door hinge 2 is fixed to the hinge mounting structure 310 by screws. The docking groove 320 is configured to be inserted and connected to the first connecting plate 15 on the same side when the ground door assembly 1 is in the closed state. At least one of the second connecting plates 300 is further provided with a sixth mounting structure for mounting the actuator 3. The sixth mounting structure is provided with a hinge hole adapted to the pivot on the end of the push rod 32. When actuators 3 are respectively provided on both ends of the ground door assembly 1, the sixth mounting structure is respectively provided on the two second connecting plates 300. When actuators 3 are provided on one end of the ground door assembly 1, the sixth mounting structure is respectively provided on one of the second connecting plates 300. Preferably, the actuator 3 is installed on the inner side of the energy absorption box 14 (i.e., on the side near the center of the ground door cover 11).

[0085] Reference Figure 9 In this embodiment, a flange structure 330 is provided at the bottom of the docking groove 320. When the ground door assembly 1 is in the closed state, the lower end of the first connecting plate 15 is inserted between the bottom surface of the docking groove and the flange structure 330, thereby using the flange structure 330 to further restrict the position of the ground door assembly 1.

[0086] The above-mentioned configuration can enhance the connection strength between the rear anti-collision beam 12 and the rear longitudinal beam 100 after the ground door assembly 1 is closed, thereby ensuring the force transmission performance between the rear anti-collision beam 12 and the rear longitudinal beam 100 after the rear of the vehicle is hit.

[0087] Furthermore, the first connecting plate 15 can also be used as a table or armrest after the door assembly 1 is opened. Its surface can be equipped with structures such as cup holders, pen holders, and folding stands for mobile phones or tablets. In addition, the first connecting plate 15 can integrate wireless charging modules and power interfaces to enhance the user experience. The first connecting plate 15 can adopt personalized graphic designs; for example, it can be in the shape of flowers, animals, clouds, or curves. A decorative pad with anti-slip properties can be adhered and inlaid on its surface to make it more aesthetically pleasing.

[0088] Example 5

[0089] This embodiment provides a vehicle that includes the ground door opening and closing device described in any of the above embodiments. (Refer to...) Figure 10 and Figure 11The vehicle also includes two rear longitudinal beams 100 and a top door assembly 200. The bottom door assembly 1 is connected to the rear ends of the two rear longitudinal beams 100 via two bottom door hinges 2, and the top door assembly 200 is connected to the roof panel via a top door hinge. The bottom door assembly 1 and the top door assembly 200 form an upper and lower opening structure. The bottom door assembly 1 and the top door assembly 200 are set to open and close independently, and the user can choose to open only the top door assembly 200 or open both the top and bottom doors simultaneously according to their needs.

[0090] Compared to existing technologies, this vehicle integrates the rear bumper beam 12 onto the ground door assembly 1, eliminating the need for the original structural reinforcement components of the ground door assembly 1. This ensures the structural strength and safety performance of the ground door assembly 1 while reducing the overall weight of the vehicle. Since the height of the ground door assembly 1 is not constrained by the position of the rear bumper beam 12, it has a very low ground clearance when open, making it easier for users to operate. Furthermore, when the ground door assembly 1 is open, the energy-absorbing box 14 and the first connecting plate 15 on the rear bumper beam 12 can be used as a table and armrest, further expanding the functionality of the ground door assembly 1. When the ground door assembly 1 is closed, the rear bumper beam 12 and the rear longitudinal beam 100 are connected through multiple mechanisms via the ground door hinge 2, the actuator 3, and the interlocking connection of the connecting plate, ensuring efficient force transmission between them.

[0091] The vehicle possesses at least all the technical features and effects of the aforementioned ground door opening and closing device, which will not be elaborated upon here.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ground door opening and closing device, characterized in that, It includes a ground door assembly (1) and a ground door hinge (2). The ground door assembly (1) is connected to the two rear longitudinal beams (100) of the vehicle through the ground door hinge (2). The ground door assembly (1) includes a ground door cover (11) and a rear anti-collision beam (12) that are fixedly connected as one unit. The door cover (11) has a first surface facing the trunk of the vehicle when the door assembly (1) is closed, and the first surface has an opening. The rear bumper beam (12) is placed inside the door cover (11). The door assembly (1) also includes an interior trim pad (13) laid at the opening of the door cover (11). The interior panel (13) includes a first panel and a second panel. The first panel is embedded on the first surface, and the first panel and the second panel are flexibly connected to the side edge of the second panel near the door hinge (2). The ground door cover (11) and the rear anti-collision beam (12) are fixed together by screws and / or welding; A gap is formed between the ground door cover (11) and the rear anti-collision beam (12), and a buffer energy-absorbing layer is provided in the gap; The rear anti-collision beam (12) is made of carbon fiber composite material or aluminum alloy material.

2. The ground door opening and closing device according to claim 1, characterized in that, The ground door assembly (1) also includes two sets of energy-absorbing components respectively disposed at both ends of the rear anti-collision beam (12); Each energy-absorbing assembly includes an energy-absorbing box (14) and a first connecting plate (15). One end of the energy-absorbing box (14) is connected to the rear anti-collision beam (12), and the other end of the energy-absorbing box (14) extends from the ground door cover (11) and is connected to the first connecting plate (15). The first connecting plate (15) is configured to engage with the rear longitudinal beam (100) on the same side when the ground door assembly (1) is in the closed state.

3. The ground door opening and closing device according to claim 1, characterized in that, The ground door cover (11) has a second surface facing away from the vehicle's trunk when the ground door assembly (1) is in the closed state, and a first mounting structure (111) for mounting a license plate is provided on the second surface. And / or, the ground door opening and closing device further includes a function expansion module, and the inner side of the ground door cover (11) is provided with a second mounting structure (112) for installing the function expansion module. And / or, ground door latches (16) are respectively installed on the left and right side walls of the ground door cover (11). And / or, a gantry latch (17) or gantry lock body (18) for locking the gantry assembly (200) of the vehicle is provided on the side of the gantry housing (11) away from the gantry hinge (2).

4. The ground door opening and closing device according to claim 1, characterized in that, It also includes a function expansion module installed on the ground door assembly (1), the function expansion module including one or more of a power interface, a lighting lamp, a sound system, a cigarette lighter, and a wireless charger.

5. The ground door opening and closing device according to claim 1, characterized in that, It also includes an actuator (3) connected between the vehicle body and the door assembly (1), which is configured to drive the door assembly (1) to rotate and open relative to the vehicle body; And / or, it also includes a limiting mechanism (4), the limiting mechanism (4) including a sleeve (41) and a cable (42), the sleeve (41) being mounted on the ground door assembly (1), one end of the cable (42) being located inside the sleeve (41) and extending and retracting within the sleeve (41), and the other end of the cable (42) extending out from the sleeve (41) and connected to the rear side panel of the vehicle.

6. The ground door opening and closing device according to claim 5, characterized in that, The actuator (3) is an electric push rod, and the two ends of the actuator (3) are respectively hinged to one of the rear longitudinal beams (100) and the rear anti-collision beam (12).

7. A vehicle, characterized in that, Includes the ground door opening and closing device as described in any one of claims 1 to 6.

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