Vehicle

Abstract

The utility model provides a vehicle. The vehicle comprises a vehicle body, a first vehicle door, a second vehicle door and a driving assembly. An opening is formed in the side part of the vehicle body; the first vehicle door and the second vehicle door are movably connected to the side part of the vehicle body; in the completely closed state, the first vehicle door and the second vehicle door jointly close the opening in the length direction of the vehicle body, and the front end of the first vehicle door is located on the inner side of the rear end of the second vehicle door. The driving assembly can drive the first vehicle door to be completely separated from the vehicle body in the width direction of the vehicle body when the first vehicle door is in the first open state, so that a gap is formed between the first vehicle door and the vehicle body. The driving assembly further drives the front end of the first vehicle door to rotate and drives the rear end of the first vehicle door to swing left and right in the width direction of the vehicle body. According to the vehicle, natural wind from the external environment can be provided for the interior of the vehicle, the vehicle running behind can be reminded to pay attention to avoiding in time, and the safety performance is improved.

Description

Technical Field

[0001] The present application relates to the field of transportation technology, and in particular, to a vehicle. Background Art

[0002] Existing vehicles usually use air conditioning systems for interior ventilation, and when the vehicle is driving, the interior ventilation is also carried out by opening the windows.

[0003] Although the above ventilation methods can meet the ventilation needs of users, how to provide users with diversified ventilation methods to enhance their driving experience and promote continuous innovation and progress in vehicle design is the common goal of practitioners in the vehicle industry. Utility Model Content

[0004] The present application provides a vehicle that can not only provide natural wind from the external environment into the vehicle, but also promptly remind vehicles traveling behind to pay attention and avoid, thereby improving safety performance.

[0005] Specifically, the present application is implemented through the following technical solutions:

[0006] The present application provides a vehicle, comprising:

[0007] A vehicle body, a first door, a second door and a drive assembly;

[0008] The vehicle body has no B-pillar, and the side of the vehicle body is provided with an opening;

[0009] The first door and the second door are both movably connected to the side of the vehicle body; in a fully closed state, the first door and the second door jointly close the opening along the length direction of the vehicle body, and the front end of the first door is located inside the rear end of the second door;

[0010] The driving assembly is connected to the vehicle body and the first door respectively; the driving assembly comprises a first driving mechanism, a second driving mechanism and a third driving mechanism; the first driving mechanism, the second driving mechanism and the third driving mechanism cooperate to drive the first door to achieve three-dimensional movement;

[0011] When the first door is in a first open state, the first drive mechanism, the second drive mechanism and the third drive mechanism cooperate to completely separate the first door from the vehicle body in a width direction of the vehicle body, so that a gap is formed between the first door and the vehicle body; and

[0012] The first driving mechanism, the second driving mechanism and the third driving mechanism further drive the front end of the first door to rotate, and drive the rear end of the first door to swing left and right along the width direction of the vehicle body.

[0013] Optionally, when the first vehicle door is in a first open state, an orthographic projection area of ​​the first vehicle door in the length direction of the vehicle body is located outside the second vehicle door in a closed state.

[0014] Optionally, when the first door is in a first open state, an orthographic projection area of ​​the first door in a width direction of the vehicle body is located outside the second door in a closed state.

[0015] Optionally, the rear end of the first door swings away from the vehicle body at an angle less than or equal to 60°.

[0016] Optionally, the vehicle further includes a controller, which is connected to the first drive mechanism, the second drive mechanism and the third drive mechanism, and is used to control the rear end of the first door to switch the swing angle on the swing path.

[0017] Optionally, the first driving mechanism includes a first motor and a first position sensor; the second driving mechanism includes a second motor and a second position sensor; the third driving mechanism includes a third motor and a third position sensor;

[0018] The controller controls the rear end of the first door to swing between any two swing positions on a swing path based on the position of the first motor detected by the first position sensor, the position of the second motor detected by the second position sensor, and the position of the third motor detected by the third position sensor.

[0019] Optionally, the first driving mechanism further includes a first connecting rod, a second connecting rod and a third connecting rod;

[0020] The two ends of the first connecting rod are rotationally connected to the first motor and the first door respectively; the two ends of the second connecting rod are rotationally connected to the vehicle body and the third connecting rod respectively; the third connecting rod is also rotationally connected to the first door; the connection between the first connecting rod and the first door is located behind the connection between the third connecting rod and the first door.

[0021] Optionally, the second driving mechanism further comprises a telescopic rod, one end of which is rotatably connected to the first door, and the other end of which is connected to the second motor;

[0022] And / or, the third driving mechanism further comprises a telescopic support rod and a rotating rod; one end of the telescopic support rod is rotatably connected to the rotating rod, and the other end is connected to the third motor; the rotating rod is also rotatably connected to the first vehicle door.

[0023] Optionally, the electric drive assembly further comprises a damping rod and a vehicle body connector;

[0024] The two ends of the damping rod are rotatably connected to the first connecting rod and the vehicle body connecting head respectively; the vehicle body connecting head is also rotatably connected to the second connecting rod.

[0025] Optionally, the vehicle further comprises:

[0026] The first driving mechanism and the second driving mechanism are located at the bottom of the first door; the third driving mechanism is located at the top of the first door.

[0027] The technical solution provided by this application can achieve the following beneficial effects:

[0028] The present application provides a vehicle that can not only provide natural wind from the external environment into the vehicle, but also promptly remind vehicles traveling behind to pay attention and avoid, thereby improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a vehicle shown in an exemplary embodiment of the present application when the first door is in a closed state.

[0030] Figure 2 It is a structural schematic diagram showing an exemplary embodiment of the present application in which the first door and the vehicle body are in a first completely separated state.

[0031] Figure 3 It is a structural schematic diagram showing an exemplary embodiment of the present application, in which the first door is in a first completely separated state from the vehicle body, and the rear end of the first door is swung to a first angle.

[0032] Figure 4 It is a structural schematic diagram showing an exemplary embodiment of the present application in which the first door and the vehicle body are in a second completely separated state.

[0033] Figure 5 It is a structural schematic diagram showing an exemplary embodiment of the present application, in which the first door is in a second completely separated state from the vehicle body and the rear end of the first door is swung to a second angle.

[0034] Figure 6 It is a structural schematic diagram showing an exemplary embodiment of the present application in which the first door is in a fully open state.

[0035] Figure 7 It is a schematic diagram of the vehicle body side structure corresponding to a first vehicle door in a closed state, shown in an exemplary embodiment of the present application.

[0036] Figure 8 It is a schematic diagram of the vehicle body side structure corresponding to a first vehicle door being in a first open state, shown in an exemplary embodiment of the present application.

[0037] Fig. 9 It is a schematic diagram of the vehicle body side structure corresponding to a first vehicle door in a fully opened state, shown in an exemplary embodiment of the present application.

[0038] Fig.10 It is a schematic diagram of the motion posture of the driving component corresponding to the first door being in a closed state, shown in an exemplary embodiment of the present application.

[0039] Fig.11 It is a schematic diagram of the motion posture of the driving component corresponding to the first door being in the first open state, shown in an exemplary embodiment of the present application.

[0040] Fig.12 It is a schematic diagram of the motion posture of the drive assembly corresponding to the first door being in a fully opened state, shown in an exemplary embodiment of the present application.

[0041] Fig.13 It is a logic block diagram between a drive component and a controller shown in an exemplary embodiment of the present application.

[0042] : Figure numerals: 10, vehicle body; 11, first door; 12, second door; 13, driving assembly; 131, first driving mechanism; 1311, first connecting rod; 1312, second connecting rod; 1313, third connecting rod; 1314, first motor; 1315, first position sensor; 132, second driving mechanism; 1321, second motor; 1322, telescopic rod; 1323, second position sensor; 133, third driving assembly; 1331, telescopic support rod; 1332, rotating rod; 1333, third motor; 1334, third position sensor; 136, damping rod; 137, vehicle body connector; 15, controller; 17, door connector; a, counterclockwise direction; d, gap; β, swing angle. DETAILED DESCRIPTION

[0043] The technical solution of the present application will be described in detail below in conjunction with the accompanying drawings.

[0044] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0045] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0046] Traditional vehicle doors are usually swing doors or sliding doors. Swing doors rely on hinges on one side of the door to open or close. On this basis, if the rear end of the door is designed to swing, it is easy for the user to be pinched by the front of the door. For sliding doors, it is more difficult to realize the swinging process of the rear end of the door because it needs to be equipped with a track.

[0047] See also Figures 1 to 9 As shown, the present application provides a vehicle, including a body 10, a first door 11, a second door 12 and a drive assembly 13. The body 10 has no B-pillar, and the side of the body 10 is provided with an opening; the first door 11 and the second door 12 are both movably connected to the side of the body 10. In a fully closed state, the first door 11 and the second door 12 jointly close the opening along the length direction of the body 10, and the front end of the first door 11 is located inside the rear end of the second door 12. The inside and outside are referenced to the inside and outside of the body 10, that is, the front end of the first door 11 faces the inside of the body 10, and the rear end of the second door 12 faces the outside of the body 10, and the two are crimped or gap-fitted.

[0048] The driving assembly 13 is respectively connected to the vehicle body 10 and the first door 11; the driving assembly 13 includes a first driving mechanism 131, a second driving mechanism 132 and a third driving mechanism 133; the first driving mechanism 131, the second driving mechanism 132 and the third driving mechanism 133 cooperate to drive the first door 11 to achieve three-dimensional movement.

[0049] The three-dimensional movement mentioned in this application means that the first driving mechanism 131, the second driving mechanism 132 and the third driving mechanism 133 can jointly drive the first door 11 to swing along the width direction of the vehicle body 10, jointly drive the first door 11 to move along the width direction of the vehicle body 10, and jointly drive the first door 11 to move along the length direction of the vehicle body 10 (the specific movement mode is detailed below).

[0050] The above-mentioned vehicle may be a recreational vehicle such as a camper, a mobile home, or may be an ordinary car or a commercial vehicle, but is not limited thereto.

[0051] like Figures 2 to 5 and Figure 8 As shown, when the first door 11 is in the first open state, the first driving mechanism 131, the second driving mechanism 132 and the third driving mechanism 133 cooperate to completely separate the first door 11 from the vehicle body 10 in the width direction (x direction) of the vehicle body 10, so that a gap d is formed between the first door 11 and the vehicle body 10; and the first driving mechanism 131, the second driving mechanism 132 and the third driving mechanism 133 also drive the front end 110 of the first door 11 to rotate, and drive the rear end of the first door 11 to swing left and right along the width direction (x direction) of the vehicle body 10. Therefore, by swinging the rear end of the vehicle, not only can natural wind from the external environment be provided to the vehicle, but also vehicles traveling behind can be reminded to avoid in time, thereby improving safety performance.

[0052] After the first door 11 is completely separated from the vehicle body 10 and before the rear end of the first door 11 is swung, the first door 11 extends along the length direction of the vehicle (y direction) and faces the side inside or outside the vehicle, and is aligned with the center line formed by the vehicle along the length direction (e.g. Figure 2 The first door 11 is parallel or substantially parallel to the vehicle (shown by the dotted line). Substantially parallel means that the angle between the side of the first door 11 facing the inside or outside of the vehicle and the center line of the vehicle is less than 5°. The first door 11 can be a front door or a rear door.

[0053] See also Figure 1 and Figure 4 , when the first door 11 is in the first open state, the orthographic projection area of ​​the first door 11 in the length direction of the vehicle body 10 is located outside the second door in the closed state. Thus, on the one hand, the rear end of the first door 11 can be prevented from interfering with the second door 12 during the swinging process; on the other hand, the gap d between the first door 11 and the vehicle body 10 can be ensured to be large enough to avoid pinching the user's hands, feet and other parts.

[0054] See also Figure 2 and Figure 4 In one embodiment, when the first door 11 is in the first open state, the orthographic projection area of ​​the first door 11 in the width direction of the vehicle body 10 is located outside the second door in the closed state. Thus, it is ensured that a circulating air path is formed around the first door 11. In one embodiment, the angle at which the rear end of the first door swings away from the vehicle body is less than or equal to 60°. Thus, it is easier to make the ambient air outside the vehicle flow into the vehicle.

[0055] For example, Figure 2 As shown in FIG. 1 , after the first door 11 is completely separated from the vehicle body 10 and before the rear end of the first door 11 is swung, since the orthographic projection area of ​​the first door 11 in the length direction of the vehicle body 10 is partially located within the second door in the closed state, the second door 12 is likely to interfere with the swinging first door 11, resulting in the following Figure 3 The rear end of the first door 11 shown in the figure swings away from the vehicle body 10 at a relatively small angle β, and cannot swing more significantly. Figure 4 and Figure 5 In the vehicle shown, before the rear end of the first door 11 swings, the orthographic projection area of ​​the first door 11 in the length direction of the vehicle body 10 is located outside the second door in the closed state, which reduces the interference of the second door 12 on the first door 11. Therefore, the rear end of the first door 11 swings away from the vehicle body 10 at a larger angle β, which can achieve a larger swing.

[0056] In one embodiment, the first door 11 of the present application is a translational door, and the second door 12 is an outward swinging door. Of course, in other embodiments, the type of the second door 12 is not limited thereto.

[0057] The sliding door is a trackless moving door, which can rely on the driving assembly 13 to drive the first door 11 to move in a manner similar to parallel movement. The specific opening and closing process of the sliding door will be described in detail below, so I will not go into details here. The swing-out door can be opened or closed by setting a hinge on the front side of the second door 12, which is similar to the structure of the existing swing-out door, so I will not go into details here.

[0058] like Fig.13 As shown, in one embodiment, the vehicle further includes a controller 15, which is connected to the first drive mechanism 131, the second drive mechanism 132 and the third drive mechanism 133, and is used to control the rear end of the first door 11 to switch the swing angle on the swing path. Thus, it is convenient for subsequent users to automatically control the swing angle of the rear end of the first door 11 through the controller through an operation module such as a button.

[0059] like Fig.13 As shown, the first driving mechanism 131 includes a first motor 1314 and a first position sensor 1315; the second driving mechanism 132 includes a second motor 1321 and a second position sensor 1323; the third driving mechanism 133 includes a third motor 1333 and a third position sensor 1334;

[0060] The controller 15 controls the rear end of the first door 11 to swing between any two swing positions on the swing path based on the position of the first motor 1314 detected by the first position sensor 1315, the position of the second motor 1321 detected by the second position sensor 1323, and the position of the third motor 1333 detected by the third position sensor 1334.

[0061] The above-mentioned various position sensors include but are not limited to Hall sensors. In the process of designing the driving component 13 and the driving of the first door 11, the one-to-one mapping relationship between the swing angle of the rear end of the first door 11 and the rotation angle or the operating position of each motor is predetermined and stored in the controller. Therefore, the measurement structure of the motor rotation angle or the operating position can be used by the Hall sensor to control the rear end of the first door 11 to swing between any two swing positions on the swing path in real time, that is, to control the swing angle of the rear end of the first door 11.

[0062] It should be noted that the number of controllers 15 can be one or more. That is, one controller 15 can control multiple position sensors to collect information of corresponding motors, and then control multiple motors to operate together to achieve the opening, closing and swinging of the first door 11. It is also possible that multiple controllers 15 control each position sensor to collect information of corresponding motors one by one, and then control each motor to operate together to achieve the opening, closing and swinging of the first door 11.

[0063] In one embodiment, the vehicle further includes a memory module, which is connected to the controller, the first position sensor, the second position sensor, and the third position sensor. Thus, the detection results of the first position sensor, the second position sensor, and the third position sensor can be transmitted to the memory module, and a memory signal is generated based on the mapping relationship between the detection results and the door swing angle, so as to memorize any two swing positions of the first door relative to the vehicle body on the swing path. After receiving the memory signal, the controller can control the first door to swing between any two memorized swing positions. Exemplarily, the memory module can be an existing chip with a memory function.

[0064] like Figures 10 to 12As shown, in one embodiment, the first driving mechanism 131 further includes a first connecting rod 1311, a second connecting rod 1312 and a third connecting rod 1313. The two ends of the first connecting rod 1311 are respectively connected to the first motor 1314 and the first door 11 for rotation; the two ends of the second connecting rod 1312 are respectively connected to the vehicle body 10 and the third connecting rod 1313 for rotation; the third connecting rod 1313 is also connected to the first door 11 for rotation; the connection between the first connecting rod 1311 and the first door 11 is located behind the connection between the third connecting rod 1313 and the first door 11.

[0065] For example, when Figure 1 and Figure 7 When the first door 11 shown in the vehicle is in a closed state, the various components in the drive assembly 13 are shown as follows: Fig.10 When the first door 11 needs to be switched from the closed position to the first open state (eg Figures 2 to 5 As shown in FIG. 1 , the first motor 1314 rotates in the forward direction and drives the first door 11 to move outward along the width direction of the vehicle body through the first connecting rod 1311. In this process, as shown in FIG. Fig. 9 and Fig.12 As shown, the second motor drives the telescopic rod to extend a part of the length, and the second connecting rod 1312 and the third connecting rod 1313 are also synchronously extended, and the third motor drives the telescopic support rod 1331 to contract to drive the rotating rod 1332 to rotate, so that the first door 11 is completely separated from the vehicle body 10 along the width direction of the vehicle body 10 (as shown in FIG. Figure 2 or Figure 4 Then, the first motor 1314 reciprocates in the forward and reverse directions again, so that the rear end of the first door 11 swings left and right along the width direction of the vehicle body 10, so as to swing out, for example, Figure 3 and Figure 5 The swing angle β shown is shown. In other examples, switching can also be performed between any other two swing positions on the swing path to switch the swing angle.

[0066] When the first door 11 stops swinging, the first motor 1314 continues to rotate in the positive direction, and the first connecting rod 1311 continues to drive the first door 11 to move toward the outside of the vehicle, so that the first door 11 is in a fully opened state (such as Figure 6 and Fig. 9 Correspondingly, the motion posture of the driving component 13 is as follows Fig.12 shown.

[0067] It should be noted that "forward" and "reverse" refer to two directions of rotation that are opposite to each other, and do not limit the specific direction of rotation. For example, when "forward" means counterclockwise direction a, "reverse" means clockwise direction; when "forward" means clockwise direction, "reverse" means counterclockwise direction a.

[0068] like Fig.10 and Fig.12 As shown, in one embodiment, the driving assembly 13 further includes a damping rod 136 and a body connector 137; the two ends of the damping rod 136 are rotatably connected to the first connecting rod 1311 and the body connector 137 respectively; the body connector 137 is also rotatably connected to the second connecting rod 1312. Therefore, in the process of the first door 11 from the fully closed state to the open state, the angle between the damping rod 136 and the first connecting rod 1311 becomes larger, so that the first driving mechanism 131 and the second driving mechanism 132 are more labor-saving; in addition, the damping rod 136 and the part of the driving assembly 13 involving multiple components connected to the door can be indirectly connected to the door through the body connector 137 through the body connector 137 through the body 10 adapter. That is, after the various components are rotatably connected to a body connector 137 together, the body connector 137 is fixedly connected to the body 10, so as to facilitate collective assembly.

[0069] It should be noted that the driving assembly 13 involves a plurality of components connected to the first door 11, and can also be indirectly connected to the first door 11 through the door connector 17. No further details will be given here.

[0070] In one embodiment, the first driving mechanism 131 and the second driving mechanism 132 are located at the bottom of the first door 11 ; and the third driving mechanism 133 is located at the top of the first door 11 .

[0071] The top and the bottom are divided by the vehicle window. The position where the first vehicle door 11 is located above the vehicle window is called the top, and the position where the first vehicle door 11 is located below the vehicle window is called the bottom.

[0072] Since the structure of the first driving mechanism 131 is relatively complex and the bottom space of the first door 11 is relatively large, the first driving mechanism 131 and the second driving mechanism 132 are usually disposed together at the bottom of the first door 11 .

[0073] Of course, in other embodiments, the drive assembly 13 provided in the present application may include three motor struts. One of the motor struts is disposed at the top of the first door 11, and the other two motor struts are disposed at intervals at the bottom of the first door 11. When the three motor struts are extended, the first door 11 is pushed out, so that the first door 11 is completely separated from the vehicle body 10 in the width direction of the vehicle body 10, so that a gap is formed between the first door 11 and the vehicle body 10. Afterwards, the motor strut connected to the rear end of the first door 11 is controlled to extend or retract, so that the rear end of the first door 11 can be swung left and right.

[0074] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A vehicle, characterized in that: include: A vehicle body, a first door, a second door and a drive assembly; The vehicle body has no B-pillar, and the side of the vehicle body is provided with an opening; The first door and the second door are both movably connected to the side of the vehicle body; in a fully closed state, the first door and the second door jointly close the opening along the length direction of the vehicle body, and the front end of the first door is located inside the rear end of the second door; The driving assembly is connected to the vehicle body and the first door respectively; the driving assembly comprises a first driving mechanism, a second driving mechanism and a third driving mechanism; the first driving mechanism, the second driving mechanism and the third driving mechanism cooperate to drive the first door to achieve three-dimensional movement; When the first door is in a first open state, the first drive mechanism, the second drive mechanism and the third drive mechanism cooperate to completely separate the first door from the vehicle body in a width direction of the vehicle body, so that a gap is formed between the first door and the vehicle body; and The first driving mechanism, the second driving mechanism and the third driving mechanism further drive the front end of the first door to rotate, and drive the rear end of the first door to swing left and right along the width direction of the vehicle body.

2. The vehicle according to claim 1, characterized in that When the first door is in a first open state, an orthographic projection area of ​​the first door in a length direction of the vehicle body is located outside the second door in a closed state.

3. The vehicle according to claim 2, characterized in that When the first door is in a first open state, an orthographic projection area of ​​the first door in a width direction of the vehicle body is located outside the second door in a closed state.

4. The vehicle according to claim 1, characterized in that The rear end of the first door swings away from the vehicle body at an angle less than or equal to 60°.

5. The vehicle according to any one of claims 1 to 4, characterized in that: The vehicle further includes a controller, which is connected to the first drive mechanism, the second drive mechanism and the third drive mechanism, and is used to control the rear end of the first door to switch the swing angle on the swing path.

6. The vehicle according to claim 5, characterized in that The first driving mechanism includes a first motor and a first position sensor; the second driving mechanism includes a second motor and a second position sensor; the third driving mechanism includes a third motor and a third position sensor; The controller controls the rear end of the first door to swing between any two swing positions on a swing path based on the position of the first motor detected by the first position sensor, the position of the second motor detected by the second position sensor, and the position of the third motor detected by the third position sensor.

7. The vehicle according to claim 6, characterized in that The first driving mechanism further includes a first connecting rod, a second connecting rod and a third connecting rod; The two ends of the first connecting rod are rotationally connected to the first motor and the first door respectively; the two ends of the second connecting rod are rotationally connected to the vehicle body and the third connecting rod respectively; the third connecting rod is also rotationally connected to the first door; the connection between the first connecting rod and the first door is located behind the connection between the third connecting rod and the first door.

8. The vehicle according to claim 6, characterized in that The second driving mechanism further comprises a telescopic rod, one end of which is rotatably connected to the first door, and the other end of which is connected to the second motor; And / or, the third driving mechanism further comprises a telescopic support rod and a rotating rod; one end of the telescopic support rod is rotatably connected to the rotating rod, and the other end is connected to the third motor; the rotating rod is also rotatably connected to the first vehicle door.

9. The vehicle according to claim 7, characterized in that The drive assembly also includes a damping rod and a body connector; The two ends of the damping rod are rotatably connected to the first connecting rod and the vehicle body connecting head respectively; the vehicle body connecting head is also rotatably connected to the second connecting rod.

10. The vehicle according to claim 1, characterized in that The first driving mechanism and the second driving mechanism are located at the bottom of the first door; and the third driving mechanism is located at the top of the first door.

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