Back door opening and closing mechanism and vehicle

Abstract

The application provides a back door opening and closing mechanism and a vehicle; wherein the back door opening and closing mechanism comprises two guide rails and a back door body, both ends of the back door body are connected with guide elements, and the guide elements comprise fixed arms and guide sliding blocks; the fixed arms are connected with the inner side surfaces of the back door body, and a groove is formed on one side, and the lower end of the groove is provided with a positioning part which is curved towards the rear or the front; the guide sliding blocks are slidingly connected with the guide rails, and are integrally connected with embedded parts; the back door opening and closing mechanism further comprises lifting driving members connected with the two guide sliding blocks. The vehicle comprises the aforementioned back door opening and closing mechanism. When the back door body is opened, first, the two guide sliding blocks are driven by the lifting driving members to move to the upper end surface of the groove, and then the back door body is driven to move to avoid the trunk. The back door opening and closing mechanism and the vehicle provided by the application can avoid the technical problem that the opening and closing of the back door is affected by the space behind the vehicle, ensure that the back door can be normally opened, and improve the operation comfort when the back door is used.

Description

Technical Field

[0001] This application belongs to the field of automotive tailgate technology, specifically relating to a tailgate opening and closing mechanism and a vehicle. Background Technology

[0002] A tailgate is a closed component installed in the trunk of a car. Currently, tailgates are mainly connected to the car body by hinges. Specifically, one side of the tailgate is connected to the upper, side, or lower end of the trunk opening to form an upward-spinning tailgate opening and closing mechanism, a side-spinning tailgate opening and closing mechanism, and a downward-spinning tailgate opening and closing mechanism, respectively.

[0003] In the use of the above-mentioned mechanism, in order to avoid interference with the opening of the back door, there must be sufficient space for rotational movement behind the back door; moreover, the larger the volume of the back door, the larger the space required for movement; in other words, whether the existing back door opening and closing mechanism can open and close normally is limited by the space behind the back door, and the operational comfort during use cannot be guaranteed. Summary of the Invention

[0004] This application provides a tailgate opening and closing mechanism and a vehicle, aiming to solve the technical problem of reduced operational comfort of the tailgate opening and closing mechanism due to the influence of rear space on tailgate opening and closing.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A tailgate opening and closing mechanism is provided, comprising two guide rails and a tailgate body; wherein the two guide rails are mounted side-by-side along the left-right direction of the vehicle on the rear side, and both are curved or inclined from bottom to top towards the front; both ends of the tailgate body are detachably connected to guide elements adapted to slide with the corresponding side guide rails; characterized in that the guide elements include:

[0007] A fixed arm, connected to the inner side of the tailgate body, has a groove on one side facing the left or right direction of the vehicle, and the lower end of the groove has a positioning part that curves backward or forward; and

[0008] A guide slider is slidably connected to the guide rail and integrally connected with an engagement part adapted to slide into the groove; the engagement part is also adapted to slide into the positioning part so as to reduce or increase the distance between the guide rail and the back door body.

[0009] Furthermore, the rear door opening and closing mechanism also includes a lifting drive component connected to the two guide sliders for driving the two guide sliders to slide from bottom to top;

[0010] The tailgate body has a closed state where the trunk is closed, and an open state where it moves upward to avoid the trunk. When the tailgate body is in the closed state, the interlocking part is located within the positioning part, and the lifting drive component can drive the guide slider to slide upward until the guide slider abuts the upper end surface of the groove. When the guide slider abuts the upper end surface of the groove, the lifting drive component can also drive the tailgate body to move to avoid the trunk.

[0011] In one possible implementation, the guiding element further includes:

[0012] An anti-detachment slider is hinged to the fixed arm along the left-right direction of the vehicle, located above the guide slider, and slidably connected to the guide rail on the corresponding side.

[0013] When the engaging part enters and exits the positioning part, the anti-detachment slider and the fixing arm swing together.

[0014] In one possible implementation, the guide rail is provided with a groove, and the groove is adapted for the guide slider and / or the anti-detachment slider to slide and engage.

[0015] In one possible implementation, there are two grooves, and the two grooves are respectively disposed on two sides of the fixed arm facing the left and right directions of the vehicle; there are two engaging parts, and the two engaging parts are disposed side by side on the guide slider along the left and right directions of the vehicle, and are respectively slidably engaged with the two grooves.

[0016] In one possible implementation, the upper end of the groove has a snap-fit ​​portion that bends forward or backward, and the snap-fit ​​portion is adapted for the insertion portion to be inserted; when the insertion portion slides to the snap-fit ​​portion, the inner sides of the upper and lower sides of the snap-fit ​​portion clamp the insertion portion, and the distance between the guide rail and the back door body increases or decreases.

[0017] In one possible implementation, the lifting drive component includes:

[0018] Two traction screws, both made of flexible material, correspond one-to-one with the two guide sliders; one end of each traction screw is fixedly connected to the corresponding guide slider; and

[0019] A rotation drive element is threadedly connected to the two traction screws to drive the other ends of the two traction screws to move simultaneously in the left-right direction, so that the two guide sliders move in the up-down direction.

[0020] In one possible implementation, the rotation drive element includes:

[0021] A rotary motor is fixedly mounted on the rear side of the vehicle, with its power output axis parallel to the left-right direction of the vehicle, and a drive gear fixedly connected to its power output end; and

[0022] Two driven gears are arranged side by side on the rear side of the vehicle and are rotatably connected to the rear side of the vehicle in the left-right direction; each driven gear meshes externally with the driving gear and has a threaded hole suitable for threaded connection with the traction screw.

[0023] When the rotating motor starts, the driving gear drives the two driven gears to rotate synchronously, thereby causing the two traction screws to move in the left and right direction of the vehicle.

[0024] In one possible implementation, a water guide groove is provided on the guide rail, and a parallel slider adapted to slide and be embedded in the water guide groove is fixedly connected to the guide slider.

[0025] In one possible implementation, the inner side of the tailgate body is integrally connected with two protrusions corresponding to the two fixed arms, and each of the protrusions has a through hole that extends along the left-right direction of the vehicle; the side of the fixed arm facing the corresponding protrusion has a threaded groove suitable for communicating with the corresponding through hole.

[0026] Each of the fixed arms has a connecting bolt between it and the corresponding protrusion, and the connecting bolt is adapted to pass through the through hole and be threadedly connected to the threaded groove.

[0027] When the connecting bolt passes through the through hole and is threaded into the threaded groove, the head of the connecting bolt and the fixing arm clamp the corresponding protrusion.

[0028] In this embodiment, the trunk is closed by embedding the tailgate body into the opening of the trunk. When it is necessary to open the tailgate body, the lifting drive component first moves the two guide sliders to the upper end face of the insertion part abutting the groove. When the insertion part retracts from the positioning part, the distance between the guide rail and the tailgate body decreases or increases accordingly, so that the tailgate body moves along the trunk opening direction to the outside or inside of the car roof. Then, the lifting drive component is activated again, causing it to move the tailgate body upward to a position that avoids the trunk and is above or below the roof, thereby opening the tailgate body.

[0029] Compared with the prior art, the tailgate opening and closing mechanism provided in this embodiment can avoid the technical problem of tailgate opening and closing being affected by the space behind the vehicle, ensure that the tailgate can be opened normally, improve the reliability of tailgate use, and ensure the operator's operating comfort.

[0030] The technical solution adopted in this application also provides a vehicle, including the rear door opening and closing mechanism proposed in any of the foregoing claims.

[0031] The beneficial effects of the vehicle provided in this embodiment are the same as those of the aforementioned tailgate opening and closing mechanism, and will not be repeated here. Attached Figure Description

[0032] Figure 1 A three-dimensional structural diagram of the rear door opening and closing mechanism provided in an embodiment of this application;

[0033] Figure 2 for Figure 1 A magnified view of a portion of the upper circle at point A;

[0034] Figure 3 This is a three-dimensional structural diagram of the guide rail and the back door body used in the embodiments of this application;

[0035] Figure 4 This is an exploded structural diagram of the back door body and the fixing arm used in the embodiments of this application.

[0036] Figure 5 This is a cross-sectional view of the structure between the guide rail and the fixed arm used in the embodiments of this application;

[0037] Figure 6 This is a three-dimensional structural diagram of the lifting drive component used in the embodiments of this application;

[0038] Figure 7 This is a three-dimensional structural diagram of the driven gear used in the embodiments of this application;

[0039] Explanation of reference numerals in the attached drawings: 1. Guide rail; 11. Slide groove; 12. Water guide groove; 2. Back door body; 21. Protrusion; 211. Through hole; 3. Fixed arm; 31. Groove; 311. Positioning part; 312. Snap-fit ​​part; 32. Threaded groove; 4. Guide slider; 41. Engaging part; 42. Parallel slider; 5. Lifting drive component; 51. Traction screw; 52. Rotation drive element; 521. Rotation motor; 5211. Drive gear; 522. Driven gear; 5221. Threaded hole; 6. Anti-detachment slider; 7. Connecting bolt. Detailed Implementation

[0040] 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.

[0041] Please refer to the following: Figures 1 to 7The rear door opening and closing mechanism provided in this application will now be described. The rear door opening and closing mechanism proposed in this application includes two guide rails 1 and a rear door body 2.

[0042] Two guide rails 1 are used to be installed side by side on the rear side of the vehicle along the left-right direction, and both are bent or tilted from bottom to top toward the front (the front here refers to the direction from the rear of the vehicle toward the front of the vehicle) to adapt to the curved or inclined surface structure of the rear side of the vehicle, respectively.

[0043] Both ends of the tailgate body 2 are detachably connected to guide elements suitable for sliding connection with the guide rail 1 on the corresponding side. By using two sets of combined mechanisms formed by the guide rail 1 and the guide elements, the sliding connection between the tailgate body 2 and the rear side of the vehicle is realized.

[0044] It should be noted that the movement of the tailgate body 2 relative to the vehicle includes two movement trajectories: First, the tailgate body 2 moves upward along the curvature or tilt direction of the guide rail 1, allowing the tailgate body 2 to avoid the trunk opening; second, the tailgate body 2 is positioned to block the trunk opening and moves along the direction of the trunk opening, allowing the tailgate body 2 to be inserted into or detached from the trunk. Specifically, when the tailgate body 2 is inserted into the trunk, the inner wall of the trunk opening can abut against the inner walls of the front and rear ends of the tailgate body 2, preventing the tailgate body 2 from sliding along the curvature or tilt direction of the guide rail 1; when the tailgate body 2 is detached from the trunk, the tailgate body 2 is located on the outside or inside of the car roof, and moving the tailgate body 2 upward at this time allows it to move above or below the car roof.

[0045] In this embodiment, for ease of description, the usage states of the tailgate body 2 are defined as a closed state and an open state. Specifically: when the tailgate body 2 is in the closed state, it is embedded in the trunk and closes the trunk opening; when the tailgate body 2 is in the open state, it is positioned to avoid the trunk opening. The tailgate body 2 has two open states: one where it is above the car roof, and the other where it is below the car roof.

[0046] The guiding elements include a fixed arm 3 and a guide slider 4.

[0047] The fixing arm 3 is connected to the inner side of the tailgate body 2. In this embodiment, the fixing arm 3 is inclined forward from bottom to top. A groove 31 is provided on one side of the fixing arm 3 facing the left or right direction of the vehicle, and the lower end of the groove 31 has a positioning part 311 that curves backward or forward. The positioning part 311 and the lower end of the groove 31 form a natural arc transition. (See also...) Figure 1 and Figure 4 In this embodiment, the positioning part 311 bends backward, that is, it bends outward toward the trunk opening.

[0048] The guide slider 4 is slidably connected to the guide rail 1 along the extension direction of the guide rail 1, and is integrally connected with a fitting part 41 suitable for slidingly engaging in the groove 31. In actual use, the fitting part 41 is also suitable for sliding into the positioning part 311, so that the tailgate body 2 moves forward or backward, thereby reducing or increasing the distance between the guide rail 1 and the tailgate body 2; specifically, when the positioning part 311 bends backward, the distance between the guide rail 1 and the tailgate body 2 decreases; when the positioning part 311 bends forward, the distance between the guide rail 1 and the tailgate body 2 increases.

[0049] It should be added that increasing or decreasing the distance between the guide rail 1 and the tailgate body 2 at this time corresponds to the two opening states of the tailgate body 2 mentioned above; specifically, increasing the distance between the guide rail 1 and the tailgate body 2 corresponds to the opening state of moving the tailgate body 2 above the car roof; decreasing the distance between the guide rail 1 and the tailgate body 2 corresponds to the opening state of moving the tailgate body 2 below the car roof.

[0050] In this embodiment, the back door opening and closing mechanism further includes a lifting drive component 5 connected to the two guide sliders 4 and used to drive the two guide sliders 4 to slide from bottom to top.

[0051] When the tailgate body 2 is in the closed state, the engaging part 41 is located within the positioning part 311. When the tailgate body 2 is in the closed state, the lifting drive component 5 can drive the guide slider 4 to slide upward until the engaging part 41 abuts against the upper end surface of the groove 31. When the engaging part 41 retracts from the positioning part 311, the distance between the guide rail 1 and the tailgate body 2 decreases or increases accordingly, causing the tailgate body 2 to move along the trunk opening direction to the outside or inside of the car roof. Subsequently, the lifting drive component 5 is activated again, causing it to move the tailgate body 2 upward to a position that avoids the trunk and is above or below the roof, thereby switching the tailgate body 2 to the open state and realizing the opening of the tailgate body 2. In this embodiment, when the tailgate body 2 is in the open state, the tailgate body 2 is below the roof.

[0052] Meanwhile, in this embodiment of the application, by embedding the tailgate body 2 into the opening of the trunk, the tailgate body 2 is switched to the closed state, thereby achieving the closure of the trunk.

[0053] When it is necessary to open the tailgate body 2, the lifting drive component 5 first drives the two guide sliders 4 to move to the upper end of the abutment groove 31, thereby increasing the distance between the tailgate body 2 and the guide rail 1, so that the tailgate body 2 exits the trunk opening; then, the lifting drive component 5 is activated again, so that it drives the tailgate body 2 to move upward to a position to avoid the trunk, thereby opening the tailgate body 2.

[0054] Compared with the prior art, the tailgate opening and closing mechanism provided in this embodiment can avoid the technical problem of tailgate opening and closing being affected by the space behind the vehicle, ensure that the tailgate can be opened normally, improve the reliability of tailgate use, and ensure the operator's operating comfort.

[0055] In some embodiments, the feature guiding element described above may employ, for example... Figure 3 and Figure 4 The structure shown. See also Figure 3 and Figure 4 The guide element also includes an anti-detachment slider 6.

[0056] The anti-detachment slider 6 is hinged to the fixed arm 3 along the left-right direction of the vehicle, located above the guide slider 4, and slidably connected to the guide rail 1 on the corresponding side.

[0057] In this embodiment, the anti-detachment slider 6 is connected to the upper end of the fixed arm 3. Specifically, the upper end surface of the fixed arm 3 is provided with a slot structure that runs through the left and right sides of the fixed arm 3. The anti-detachment slider 6 is integrally provided with a connecting shaft that can be rotatably embedded in this slot structure.

[0058] When the engaging part 41 enters and exits the positioning part 311, the anti-detachment slider 6 and the fixed arm 3 swing together, thereby ensuring that the connection position between the fixed arm 3 and the anti-detachment slider 6 and the connection relationship between the guide rail 1 tends to be stable.

[0059] In some embodiments, the aforementioned feature rail 1 may be adopted as follows: Figure 3 and Figure 5 The structure shown. See also Figure 3 and Figure 5 The guide rail 1 is provided with a groove 11, and the groove 11 is suitable for the guide slider 4 and / or the anti-detachment slider 6 to slide and engage; the combination structure of the groove 11 and the slider connected thereto enhances the structural stability between the guide rail 1 and the fixed arm 3.

[0060] In some embodiments, the aforementioned feature groove 31 and interlocking portion 41 may be adopted as follows: Figures 3 to 5 The structure shown. See also Figures 3 to 5 The groove 31 and the fitting part 41 are both two in number; the two grooves 31 are respectively provided on the two sides of the fixed arm 3 facing the left and right directions of the vehicle, and the two fitting parts 41 are arranged side by side on the guide slider 4 along the left and right directions of the vehicle and are slidably fitted into the two grooves 31 respectively, thereby enhancing the stability of the connection structure between the fixed arm 3 and the guide slider 4.

[0061] In some embodiments, the aforementioned feature groove 31 may be adopted as follows: Figures 3 to 5 The structure shown. See also Figures 3 to 5The upper end of the groove 31 has a snap-fit ​​portion 312 that bends forward or backward, and the snap-fit ​​portion 312 is adapted for the insertion portion 41 to be inserted into; wherein, the orientation of the snap-fit ​​portion 312 has a clear correspondence with the orientation of the positioning portion 311, specifically: when the positioning portion 311 bends backward, the snap-fit ​​portion 312 bends forward; when the positioning portion 311 bends forward, the snap-fit ​​portion 312 bends backward.

[0062] When the engaging part 41 slides upward to the front end face of the abutting groove 31, the guide slider 4 continues to move forward, allowing the engaging part 41 to enter the locking part 312. When the engaging part 41 is inserted into the locking part 312, the two inner sides of the upper and lower sides of the locking part 312 clamp the engaging part 41, ensuring that when the guide slider 4 is moved further forward, the engaging part 41 can abut against the inner wall of the locking part 312 and drive the fixing arm 3 to move upward. At the same time, when the engaging part 41 is inserted into the locking part 312, the distance between the tailgate body 2 and the guide rail 1 increases or decreases. Specifically, the bending time of the locking part 312 towards the forward increases, and the bending time of the locking part 312 towards the rear decreases, thereby achieving the positioning of the tailgate body 2 relative to the vehicle body in the open state.

[0063] In this embodiment, the snap-fit ​​portion 312 bends forward. When the insert portion 41 enters the snap-fit ​​portion 312, the distance between the tailgate body 2 and the guide rail 1 increases, so that the tailgate body 2, which is under the car roof, moves toward the car roof. In actual use, a groove structure suitable for the insertion of the tailgate body 2 can be opened on the inner or outer side of the car roof, so that the positioned tailgate body 2 can be inserted, thereby improving the structural connection relationship of this product and strengthening the structural strength.

[0064] In some embodiments, the aforementioned lifting drive member 5 may be adopted as follows: Figure 6 The structure shown. See also Figure 6 The lifting drive component 5 includes two traction screws 51 and a rotation drive element 52.

[0065] Both traction screws 51 are made of flexible material and correspond one-to-one with two guide sliders 4; in this embodiment, one end of the traction screw 51 is fixedly connected to the corresponding guide slider 4.

[0066] The rotation drive element 52 is threadedly connected to two traction screws 51, which is used to drive the other end of the two traction screws 51 to move simultaneously in the left and right direction, so that the end of the two traction screws 51 connected to the guide slider 4 moves in the up and down direction, thereby driving the two guide sliders 4 to move in the up and down direction.

[0067] By adopting the above technical solution, the rotation drive element 52 drives the two guide sliders 4 to move, eliminating the need for manual intervention and improving the stability of the component during use.

[0068] In some embodiments, the aforementioned feature rotation drive element 52 may be employed as follows: Figure 6 and Figure 7 The structure shown. See also Figure 6 and Figure 7 The aforementioned rotation drive element 52 includes a rotation motor 521 and two driven gears 522.

[0069] The rotating motor 521 is fixedly installed on the rear side of the vehicle. Its power output axis is parallel to the left and right direction of the vehicle, and its power output end is coaxial and fixedly connected to the drive gear 5211.

[0070] Two driven gears 522 are arranged side by side on the rear side of the vehicle and are both rotatably connected to the rear side of the vehicle in the left-right direction.

[0071] Each driven gear 522 meshes externally with the driving gear 5211, and each is coaxially provided with a threaded hole 5221 suitable for threaded connection with the traction screw 51.

[0072] When the rotating motor 521 is started, the driving gear 5211 drives the two driven gears 522 to rotate synchronously, thereby causing the ends of the two traction screws 51 away from the guide slider 4 to move in the left and right direction of the vehicle, and causing the ends of the two traction screws 51 close to the corresponding guide slider 4 to move in the up and down direction.

[0073] In some embodiments, the aforementioned feature rail 1 and guide slider 4 can be connected by, for example, Figure 4 and Figure 5 The structure shown. See also Figure 4 and Figure 5 A water channel 12 is provided on the guide rail 1, which can discharge liquid from the surface of the guide rail 1.

[0074] The guide slider 4 is also fixedly connected to a parallel slider 42 that is suitable for sliding and embedding in the water guide groove 12. The parallel slider 42 and the guide slider 4 are distributed along the left and right direction of the vehicle.

[0075] like Figure 5 As shown, the parallel slider 42 is integrally connected with a plug-in part suitable for being embedded in the side of the water guide trough 12, and there is a gap between part of the parallel slider 42 and the bottom of the water guide trough 12.

[0076] By adopting the above technical solution, on the one hand, the drainage efficiency of the drainage trough is ensured; on the other hand, the parallel slider 42 enhances the stability of the connection structure between the guide slider 4 and the guide rail 1.

[0077] In some embodiments, the aforementioned feature door body 2 and fixing arm 3 can be connected by, for example, Figure 4 The structure shown. See also Figure 4 The inner side of the tailgate body 2 is integrally connected with two protrusions 21 that correspond one-to-one with the two fixed arms 3. Each protrusion 21 has a through hole 211 that runs through the left and right directions of the vehicle.

[0078] The side of the fixed arm 3 facing the corresponding protrusion 21 has a threaded groove 32 suitable for communicating with the corresponding through hole 211. Specifically, when the fixed arm 3 abuts against the protrusion 21, moving the fixed arm 3 can make the threaded groove 32 communicate with the through hole 211.

[0079] Each fixed arm 3 has a connecting bolt 7 between it and the corresponding protrusion 21, and the connecting bolt 7 is adapted to pass through the through hole 211 and be threadedly connected to the threaded groove 32.

[0080] When the connecting bolt 7 passes through the through hole 211 and is threaded into the threaded groove 32, the head of the connecting bolt 7 and the fixing arm 3 clamp the corresponding protrusion 21, thereby connecting the back door body 2 and the fixing arm 3.

[0081] In this embodiment, the through hole 211 is a square hole with a rectangular cross-section, so that when the connecting bolt 7 passes through the through hole 211 and does not clamp the protrusion 21, the fixing arm 3 can loosen relative to the back door body 2.

[0082] In this embodiment, each protrusion 21 includes two protrusions 21 distributed in the vertical direction; the combination structure of the above-mentioned through hole 211, threaded groove 32 and connecting bolt 7 has four sets, and the four sets of the combination structure correspond to the four sets of protrusions 21.

[0083] Based on the same inventive concept, embodiments of this application also provide a vehicle including the tailgate opening and closing mechanism proposed in any of the above claims.

[0084] The beneficial effects of the vehicle used in this application embodiment are the same as those of the aforementioned tailgate opening and closing mechanism. Both are designed to solve the technical problem of tailgate opening being restricted by the space behind the tailgate, ensuring that the tailgate can remain open normally even when there is insufficient space behind it. This will not be described in detail here.

[0085] The above content is only 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 rear door opening and closing mechanism, comprising two guide rails (1) and a rear door body (2); wherein, Two guide rails (1) are mounted side-by-side on the rear side of the vehicle along the left-right direction, and both are curved or inclined forward from bottom to top; both ends of the tailgate body (2) are detachably connected to guide elements suitable for sliding connection with the corresponding side guide rails (1); characterized in that the guide elements include: A fixed arm (3) is connected to the inner side of the tailgate body (2), and a groove (31) is provided on one side facing the left or right direction of the vehicle. The lower end of the groove (31) has a positioning part (311) that bends backward or forward. The guide slider (4) is slidably connected to the guide rail (1) and integrally connected with an engagement part (41) adapted to be slidably fitted into the groove (31); the engagement part (41) is also adapted to slide into the positioning part (311) so that the distance between the guide rail (1) and the back door body (2) is reduced or increased. Furthermore, the back door opening and closing mechanism also includes a lifting drive component (5) connected to the two guide sliders (4) for driving the two guide sliders (4) to slide from bottom to top. The tailgate body (2) has a closed state with the trunk closed, and an open state with the trunk open and the tailgate body moving upward to avoid the trunk. When the tailgate body (2) is in the closed state, the insert (41) is in the positioning part (311), and the lifting drive member (5) can drive the guide slider (4) to slide upward until the guide slider (4) abuts the upper end face of the groove (31). When the guide slider (4) abuts the upper end face of the groove (31), the lifting drive member (5) can also drive the tailgate body (2) to move to avoid the trunk. The lifting drive component (5) includes: Both traction screws (51) are made of flexible material and correspond one-to-one with the two guide sliders (4); one end of each traction screw (51) is fixedly connected to the corresponding guide slider (4); and The rotating drive element (52) is threadedly connected to the two traction screws (51) to drive the other ends of the two traction screws (51) to move simultaneously in the left and right direction, so that the two guide sliders (4) move in the up and down direction. The rotation drive element (52) includes: A rotary motor (521) is fixedly mounted on the rear side of the vehicle, with its power output axis parallel to the left-right direction of the vehicle, and a drive gear (5211) fixedly connected to its power output end; and Two driven gears (522) are arranged side by side on the rear side of the vehicle and are rotatably connected to the rear side of the vehicle in the left-right direction; each driven gear (522) meshes externally with the driving gear (5211) and has a threaded hole (5221) suitable for threaded connection with the traction screw (51). When the rotating motor (521) is started, the driving gear (5211) drives the two driven gears (522) to rotate synchronously, thereby causing the two traction screws (51) to move in the left and right directions of the vehicle.

2. The rear door opening and closing mechanism as described in claim 1, characterized in that, The guiding element further includes: The anti-detachment slider (6) is hinged to the fixed arm (3) along the left and right direction of the vehicle, located above the guide slider (4), and slidably connected to the guide rail (1) on the corresponding side. When the insert (41) enters and exits the positioning part (311), the anti-detachment slider (6) swings between the fixed arm (3).

3. The rear door opening and closing mechanism as described in claim 2, characterized in that, The guide rail (1) is provided with a groove (11), and the groove (11) is adapted to allow the guide slider (4) and / or the anti-detachment slider (6) to slide and engage.

4. The rear door opening and closing mechanism as described in claim 1, characterized in that, There are two grooves (31), and the two grooves (31) are respectively disposed on the two sides of the fixed arm (3) facing the left and right directions of the vehicle; there are two interlocking parts (41), and the two interlocking parts (41) are disposed side by side on the guide slider (4) along the left and right directions of the vehicle, and are respectively slidably interlocked with the two grooves (31).

5. The rear door opening and closing mechanism as described in any one of claims 1-4, characterized in that, The upper end of the groove (31) has a snap-fit ​​portion (312) that bends toward the front or rear, and the snap-fit ​​portion (312) is adapted for the insertion portion (41) to be inserted; when the insertion portion (41) slides to the snap-fit ​​portion (312), the inner sides of the upper and lower sides of the snap-fit ​​portion (312) clamp the insertion portion (41), and the distance between the guide rail (1) and the back door body (2) increases or decreases.

6. The rear door opening and closing mechanism as described in claim 1, characterized in that, A water guide groove (12) is provided on the guide rail (1), and a parallel slider (42) suitable for sliding and embedding in the water guide groove (12) is fixedly connected to the guide slider (4).

7. The rear door opening and closing mechanism as described in claim 1, characterized in that, The inner side of the tailgate body (2) is integrally connected with two protrusions (21) corresponding to the two fixed arms (3), and each of the protrusions (21) has a through hole (211) that runs through the left and right direction of the vehicle; the side of the fixed arm (3) facing the corresponding protrusion (21) has a threaded groove (32) suitable for communicating with the corresponding through hole (211). Each of the fixed arms (3) has a connecting bolt (7) between it and the corresponding protrusion (21), and the connecting bolt (7) is adapted to pass through the through hole (211) and be threaded to the threaded groove (32); When the connecting bolt (7) passes through the through hole (211) and is threaded into the threaded groove (32), the head of the connecting bolt (7) and the fixing arm (3) clamp the corresponding protrusion (21).

8. A vehicle, characterized in that, Includes the rear door opening and closing mechanism as described in any one of claims 1-7.

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