Back door folding structure, folding type back door assembly and vehicle

Abstract

The utility model provides a back door folding structure, a folding type back door assembly and a vehicle, and belongs to the technical field of vehicle parts, the back door folding structure comprises a main connecting piece, an auxiliary connecting piece, a switch telescopic piece and a folding telescopic piece; the main connecting piece is connected with the main back door, the auxiliary connecting piece is connected with the auxiliary back door, the main connecting piece is hinged to the auxiliary connecting piece so that the main back door can be hinged to the auxiliary back door, and a hinged shaft between the main connecting piece and the auxiliary connecting piece is parallel to a hinged shaft between the main back door and a car body. The two ends of the switch telescopic piece are hinged to the vehicle body and the main connecting piece respectively, and the two ends of the folding telescopic piece are hinged to the vehicle body and the auxiliary connecting piece respectively. When the back door is opened, the auxiliary back door can be folded and recycled, the overall length of the back door is shortened, the space needed for opening the back door is further reduced, and full-angle opening of the back door in a narrow space is achieved; the main connecting piece, the auxiliary connecting piece, the switch telescopic piece and the folding telescopic piece form a four-connecting-rod mechanism which is stable in structure, and the stability of the back door in the opening and closing process is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle components, and in particular relates to a back door folding structure, a folding back door assembly and a vehicle. Background Art

[0002] The rear doors of hatchbacks can be opened in two ways, including the hatchback and side-opening. These opening methods require the rear door to flip backwards and take up more space behind the vehicle. If there are obstacles close to the rear of the vehicle, it will directly affect the degree of opening of the rear door, which may cause the rear door to be unable to open at full angles. For medium and large SUVs and MPVs, the rear doors are larger in size and require more space to open. The probability of the rear door being unable to open at full angles is also higher, which directly affects the vehicle experience. Utility Model Content

[0003] The embodiments of the utility model provide a back door folding structure, a folding back door assembly and a vehicle, aiming to solve the problem in the prior art that a large space is required to open the back door, which easily causes the back door to be unable to open at a full angle.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] In a first aspect, an embodiment of the utility model provides a back door folding structure, comprising:

[0006] Main connecting parts, auxiliary connecting parts, switch telescopic parts and folding telescopic parts;

[0007] The main connecting member is connected to the main back door, the secondary connecting member is connected to the secondary back door, the main connecting member and the secondary connecting member are hinged to realize the hinge connection between the main back door and the secondary back door, and the hinge axis between the main connecting member and the secondary connecting member is parallel to the hinge axis between the main back door and the vehicle body;

[0008] The two ends of the switch telescopic member are respectively hinged to the vehicle body and the main connecting member, and the two ends of the folding telescopic member are respectively hinged to the vehicle body and the auxiliary connecting member.

[0009] In combination with the first aspect, in a possible implementation, the switch telescopic member and the vehicle body, the switch telescopic member and the main connecting member, the folding telescopic member and the vehicle body, and the folding telescopic member and the auxiliary connecting member are all connected by ball joints.

[0010] In some embodiments, the main connecting member has a main fixed plate, a first main hinge plate and a second main hinge plate connected in sequence, the main fixed plate is fitted and connected to the side of the main back door, the first main hinge plate is hinged to the switch telescopic member, and the second main hinge plate is hinged to the secondary connecting member; in a direction parallel to the hinge axis between the main connecting member and the secondary connecting member, the main fixed plate and the first main hinge plate, as well as the first main hinge plate and the second main hinge plate are staggered to form a step structure.

[0011] In some embodiments, a main reinforcing rib is formed at the intersection area of ​​the first main hinge plate and the main fixing plate.

[0012] In some embodiments, the secondary connecting member comprises a secondary fixed plate, a first secondary hinge plate and a second secondary hinge plate connected in sequence, the secondary fixed plate is fitted and connected to the side of the secondary back door, the first secondary hinge plate is hinged to the folding and telescopic member, and the second secondary hinge plate is hinged to the main connecting member; in a direction parallel to the hinge axis between the main connecting member and the secondary connecting member, the secondary fixed plate and the first secondary hinge plate, as well as the first secondary hinge plate and the second secondary hinge plate are staggered to form a step structure.

[0013] In some embodiments, the tailgate folding structure also includes a switch support frame, which has a first support plate and a second support plate, the first support plate is fitly connected to the edge of the vehicle body, the second support plate is arranged at an angle to the first support plate and is hinged to the switch telescopic member.

[0014] In some embodiments, a reinforcing boss is provided on the second support plate, and the switch telescopic member is hinged to the reinforcing boss.

[0015] In combination with the first aspect, in a possible implementation, the hinge point between the switch telescopic member and the vehicle body is defined as the first hinge point, the hinge point between the folding telescopic member and the vehicle body is defined as the second hinge point, the first hinge point is located between the second hinge point and the hinge axis of the main tailgate and the vehicle body, and the switch telescopic member and the folding telescopic member are staggered in a direction parallel to the hinge axis of the main connecting member and the auxiliary connecting member.

[0016] The scheme shown in the embodiment of the present application, compared with the prior art, the back door includes a main back door and a secondary back door which are separately arranged, and one side of the main back door is hinged with the vehicle body, and the main connecting member and the secondary connecting member cooperate to form a hinge structure connecting the back door and the secondary back door. In the closed state, the folding telescopic member is in the maximum length state, the secondary back door and the main back door are fully unfolded, and the switch telescopic member is in the minimum length state; in the process of opening the door, the switch telescopic member gradually extends, and drives the main back door to rotate and open through the main connecting member, and at the same time, the folding telescopic member shortens, and drives the secondary back door to gradually rotate and fold in the direction toward the vehicle body through the secondary connecting member, thereby shortening the length of the back door after opening; the door can be closed by reverse operation. The back door folding structure of the present application can fold and retract the secondary back door when the back door is opened, shorten the overall length of the back door, and then reduce the space required for the back door to open, so as to realize the full-angle opening of the back door in a small space; and the main connecting member, the secondary connecting member, the switch telescopic member and the folding telescopic member constitute a relatively stable four-bar linkage mechanism to ensure the stability of the back door opening and closing process.

[0017] In a second aspect, an embodiment of the utility model further provides a folding tailgate assembly, including a main tailgate, a secondary tailgate, and the tailgate folding structure, wherein one side of the main tailgate is hinged to the vehicle body.

[0018] Compared with the prior art, the solution shown in the embodiment of the present application can achieve full-angle and smooth opening of the back door in a small space by adopting the above-mentioned back door folding structure, thereby improving the convenience of taking and placing items from the trunk in a small space.

[0019] In a third aspect, an embodiment of the utility model further provides a vehicle, comprising the above-mentioned folding tailgate assembly.

[0020] Compared with the prior art, the solution shown in the embodiment of the present application improves the convenience of taking and placing items from the trunk in a small space by adopting the above-mentioned folding tailgate assembly, thereby improving the quality of the entire vehicle and the driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of the folding back door structure provided by an embodiment of the utility model in a closed state;

[0022] Figure 2 A schematic diagram of the structure of the folding back door structure provided by the embodiment of the utility model in the open state;

[0023] Figure 3 The main connecting member, ball joint, switch telescopic member and switch support frame used in the embodiment of the utility model are explosively disassembled Figure 1 ;

[0024] Figure 4The main connecting member, ball joint, switch telescopic member and switch support frame used in the embodiment of the utility model are explosively disassembled Figure 2 ;

[0025] Figure 5 A schematic diagram of the structure of a foldable back door assembly in a closed state provided by an embodiment of the utility model;

[0026] Figure 6 A schematic diagram of the structure of a foldable back door assembly in an open state provided by an embodiment of the utility model;

[0027] Description of reference numerals:

[0028] 1. Main connecting member; 110. Main fixing plate; 120. First main hinge plate; 130. Second main hinge plate; 140. Main reinforcing rib; 2. Secondary connecting member; 210. Secondary fixing plate; 220. First secondary hinge plate; 230. Second secondary hinge plate; 240. Secondary reinforcing rib; 3. Switch telescopic member; 4. Folding telescopic member; 5. Main back door; 6. Secondary back door; 7. Ball joint; 710. Ball seat; 720. Ball pin; 721. Ball head; 8. Switch support frame; 810. First support plate; 811. Fixing hole; 820. Second support plate; 830. Reinforcement boss; 9. First hinge point; 10. Second hinge point. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0031] In the claims, specification and the above-mentioned drawings of the present utility model, the terms "up" and "down" are the same as the up and down directions of the vehicle body, the terms "front" and "rear" are the same as the front and rear directions of the vehicle body, the terms "left" and "right" are the same as the left and right directions of the vehicle body, the term "inside" refers to the direction toward the passenger compartment, and the term "outside" refers to the direction away from the passenger compartment. The remaining directional words, unless otherwise clearly defined, such as the use of terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "clockwise", "counterclockwise", "high", "low" and the like to indicate directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the specific protection scope of the present utility model.

[0032] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0033] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0034] In the claims, specification and the above drawings of the utility model, if the term "fit connection" is used, its implementation methods include but are not limited to welding after fitting, connecting through threaded connectors after fitting, etc.

[0035] Please also read Figures 1 to 6 The back door folding structure provided by the utility model is now described. The back door folding structure comprises a main connecting member 1, a secondary connecting member 2, a switch telescopic member 3 and a folding telescopic member 4; the main connecting member 1 is connected to the main back door 5, the secondary connecting member 2 is connected to the secondary back door 6, the main connecting member 1 and the secondary connecting member 2 are hinged to realize the hinge of the main back door 5 and the secondary back door 6, and the hinge axis between the main connecting member 1 and the secondary connecting member 2 is parallel to the hinge axis between the main back door 5 and the vehicle body; the two ends of the switch telescopic member 3 are respectively hinged to the vehicle body and the main connecting member 1, and the two ends of the folding telescopic member 4 are respectively hinged to the vehicle body and the secondary connecting member 2.

[0036] The back door folding structure of this embodiment is applicable to various types of back doors. Taking a hatchback back door as an example, the upper edge of the main back door 5 is hinged to the vehicle body (specifically, the upper part of the rear opening of the passenger compartment), and the hinge axis is set in the left-right direction. The main connecting member 1 is located at the lower part of the main back door 5, and the auxiliary back door 6 is hinged to the lower side of the main back door 5 through the auxiliary connecting member 2, and the hinge axis is set in the left-right direction; based on this, the switch telescopic member 3 is set close to the left and right parts of the vehicle body, and the folding telescopic member 4 is set in a similar manner to the switch telescopic member 3. Taking a side-opening back door as an example, the left edge of the main back door 5 is hinged to the vehicle body (specifically, the left side of the rear opening of the passenger compartment), and the hinge axis is set in the up-down direction. The main connecting member 1 is located at the right side of the main back door 5, and the auxiliary back door 6 is hinged to the right side of the main back door 5 through the auxiliary connecting member 2, and the hinge axis is set in the up-down direction; based on this, the switch telescopic member 3 is set close to the left and right parts of the vehicle body, and the folding telescopic member 4 is set in a similar manner to the switch telescopic member 3. The double-leaf door can be arranged in an upper and lower opening or a left and right opening manner, and the door body on each side includes a main back door 5 and a secondary back door 6, or only the door body on one side includes a main back door 5 and a secondary back door 6. The specific arrangement principle is similar to the above principle and will not be repeated here. This embodiment exemplarily shows the use scenario of a hatchback back door, based on which the back door folding structure is located on the left and / or right side of the main back door 5 and the secondary back door 6.

[0037] It should be noted that, in the same back door folding structure, the switch telescopic part 3 and the folding telescopic part 4 can be in a one-to-one corresponding quantity relationship, or one switch telescopic part 3 can correspond to at least two folding telescopic parts 4 (wherein, at least two folding telescopic parts 4 need to be arranged parallel to each other), or at least two switch telescopic parts 3 can correspond to one folding telescopic part 4 (wherein, at least two switch telescopic parts 3 need to be arranged parallel to each other).

[0038] It should also be noted that the back door folding structure can be set only on one side of the vehicle body, for example, only from the left or right side of the vehicle body to provide a single-sided opening and closing driving force and folding driving force to the back door; or, the back door folding structure is set on both sides of the vehicle body, so that the back door can obtain a double-sided opening and closing driving force and a folding driving force, and the force is more stable. In addition, the end of the switch telescopic part connected to the vehicle body can be connected to the side wall, ceiling, floor and other positions of the vehicle body, and the main connecting part 1 can be located at the edge of the main back door 5, or at a position where the front side of the main back door 5 is at a certain distance from the edge, which can meet the needs of opening and closing the door and taking and placing items; the telescopic part is also set in a similar way, which will not be repeated here.

[0039] In this embodiment, the implementation methods of the switch telescopic member and the telescopic member include but are not limited to the following:

[0040] 1) Both the switch telescopic member and the telescopic member are electrically controlled components (such as electric push rods), and the two are respectively connected to the control unit (such as a driving computer). After the switch telescopic member and the telescopic member receive the door opening command, the switch telescopic member extends and the telescopic member shortens until the switch telescopic member extends to the maximum length and the telescopic member shortens to the minimum length. At this time, the back door is fully open; reverse control can be used to close the door.

[0041] 2) Both the switch telescopic member and the telescopic member are manually controlled components (such as a gas-strut damping telescopic rod). The user pulls the main back door 5 by hand to flip the main back door 5 backward, and at the same time pushes the auxiliary back door 6 by hand to flip and fold the auxiliary back door 6 forward until the switch telescopic member is extended to the maximum length and the telescopic member is shortened to the minimum length. At this time, the back door is fully open; the reverse control can be used to close the door.

[0042] 3) One of the switch telescopic member and the telescopic member is an electrically controlled component, and the other is a manually controlled component. During operation, the steps of the above two implementation methods can be combined with each other, which will not be repeated here.

[0043] Compared with the prior art, the back door folding structure provided in this embodiment includes a main back door 5 and a secondary back door 6 which are separately arranged, and one side of the main back door 5 is hinged to the vehicle body, and the main connecting member 1 and the secondary connecting member 2 cooperate to form a hinge structure connecting the back door and the secondary back door 6. In the closed state, the folding telescopic member 4 is in the maximum length state, the secondary back door 6 and the main back door 5 are fully unfolded, and the switch telescopic member 3 is in the minimum length state; in the process of opening the door, the switch telescopic member 3 gradually extends, and drives the main back door 5 to rotate and open through the main connecting member 1, and at the same time, the folding telescopic member 4 shortens, and drives the secondary back door 6 to gradually rotate and fold in the direction toward the vehicle body through the secondary connecting member 2, thereby shortening the length of the back door after opening; the reverse operation can realize the closing of the door. The back door folding structure of the present embodiment can fold and retract the auxiliary back door 6 when the back door is opened, thereby shortening the overall length of the back door, thereby reducing the space required for opening the back door, and realizing full-angle opening of the back door in a small space; and the main connecting member 1, the auxiliary connecting member 2, the switch telescopic member 3 and the folding telescopic member 4 form a four-bar mechanism with a relatively stable structure to ensure the stability of the back door opening and closing process.

[0044] The hinges between the switch telescopic member 3 and the vehicle body, between the switch telescopic member 3 and the main connecting member 1, between the folding telescopic member 4 and the vehicle body, and between the folding telescopic member 4 and the auxiliary connecting member 2 can be realized by a hinge shaft component that can only rotate in both directions. However, this hinge method cannot produce displacement or deflection along the axial direction of the hinge shaft, and has strict requirements on the location of the switch telescopic member 3 and the folding telescopic member 4. In order to reduce the overall design and assembly difficulty of the back door folding structure, in some embodiments, the switch telescopic member 3 and the vehicle body, the switch telescopic member 3 and the main connecting member 1, the folding telescopic member 4 and the vehicle body, and the folding telescopic member 4 and the auxiliary connecting member 2 are all connected by a ball joint 7, such as Figures 1 to 4 The ball joint 7 structure can not only rotate, but also swing at multiple angles, so that the switch telescopic member 3 and the folding telescopic member 4 have more freedom of movement during the telescopic process, and the setting position requirements of the switch telescopic member 3 and the folding telescopic member 4 are relatively low, which is convenient for more full use of the space inside the vehicle and reduces the difficulty of design and assembly.

[0045] In some specific embodiments of the ball joint 7, the ball joint 7 includes a ball seat 710 and a ball pin 720, such as Figure 3 and Figure 4 As shown, the ball head 721 of the ball pin 720 is placed in the ball socket formed by the ball seat 710. Based on this ball joint 7 structure, in order to facilitate assembly, the ball seats 710 are respectively set at both ends of the lifting and telescopic parts, and the opening direction of the ball seat 710 is set at an angle (for example, an angle of 80°, 90°, or 95°) with the telescopic path of the lifting and telescopic parts. One end of the ball pin 720 is fixed to the main connecting part 1 or the vehicle body, and the ball head 721 at the other end is placed in the ball socket of the corresponding ball seat 710; the ball joint 7 on the folding and telescopic parts 4 is also set in a similar manner, which will not be repeated here. By adopting this arrangement, the space at both ends of the lifting telescopic part and the folding telescopic part 4 is fully utilized, and sockets are respectively opened on the end faces of each telescopic part. The ball seat 710 is directly inserted and fixed in the corresponding sockets, which is very convenient to install. In addition, this installation method can keep the overall external dimensions of the ball seat 710 in the axial direction relatively uniform, avoid the occurrence of weakening structures such as bending and shrinkage, which is beneficial to ensuring the overall structural strength of the ball seat 710; at the same time, the arrangement of the ball pin 720 is also relatively simple, and the overall structure will not have a bending structure, thereby ensuring the overall structural strength of the ball pin 720 and extending the overall service life of the ball joint 7.

[0046] More specifically, in order to further enhance the structural strength of the ball pin 720, the main body of the ball pin 720 is a conical member, a ball head 721 is provided at the small end of the conical member, and a large end is fixed to the main connector 1, the auxiliary connector 2 or the vehicle body.

[0047] In some embodiments, the main connecting member 1 may be used as follows: Figures 1 to 4In the structure shown, the main connecting member 1 has a main fixed plate 110, a first main hinge plate 120 and a second main hinge plate 130 connected in sequence, the main fixed plate 110 is fitted and connected to the side of the main back door 5, the first main hinge plate 120 is hinged to the switch telescopic member 3, and the second main hinge plate 130 is hinged to the auxiliary connecting member 2; in the direction parallel to the hinge axis between the main connecting member 1 and the auxiliary connecting member 2, the main fixed plate 110 and the first main hinge plate 120, as well as the first main hinge plate 120 and the second main hinge plate 130 are staggered to form a step structure. In this embodiment, the main connecting member 1 is designed in sections, and the connection with the main back door 5 is achieved through the main fixing plate 110; due to the step setting between the main fixing plate 110 and the first main hinge plate 120, a certain hinge operation space can be generated between the first main hinge plate 120 and the main back door 5, and while realizing the hinge connection with the lifting and telescopic parts, interference between the hinge structure and the main back door 5 is avoided; due to the step setting between the first main hinge plate 120 and the second main hinge plate 130, a certain hinge operation space can be generated between the second main hinge plate 130 and the main back door 5, and while realizing the hinge connection with the main connecting member 1 and the auxiliary connecting member 2, interference between the hinge structure and the main back door 5 is avoided; in addition, the design of the step-shaped plate also enhances the overall structural strength of the main connecting member 1, thereby ensuring its reliability in use.

[0048] It should be noted that, in the direction from the main fixed plate 110 to the second main hinge plate 130, the step structure formed between the main fixed plate 110 and the first main hinge plate 120 and between the first main hinge plate 120 and the second main hinge plate 130 can be a structure that is sequentially away from the main back door 5, or can be other step structures as long as they can meet the assembly requirements, and no sole limitation is made here.

[0049] Based on the above embodiments, see Figures 1 to 4 In the case where the first main hinge plate 120 and the main fixed plate 110 are misaligned, since the first main hinge plate 120 is not directly connected to the main back door 5, the switch driving force provided by the switch telescopic member 3 is mainly concentrated on the first main hinge plate 120, and the gravity of the main back door 5 directly acts on the main fixed plate 110, so that the first main hinge plate 120 and the main fixed plate 110 are subjected to opposite forces, and deformation is easily generated in the intersection area of ​​the two. In this embodiment, the main reinforcing rib 140 is formed at the intersection area of ​​the first main hinge plate 120 and the second main hinge plate 130, which effectively enhances the structural strength of the area and avoids deformation problems.

[0050] In some embodiments, the secondary connector 2 may be Figures 1 to 4In the structure shown, the secondary connecting member 2 has a secondary fixed plate 210, a first secondary hinge plate 220 and a second secondary hinge plate 230 connected in sequence, the secondary fixed plate 210 is fitted and connected to the side of the secondary back door 6, the first secondary hinge plate 220 is hinged to the folding and telescopic member 4, and the second secondary hinge plate 230 is hinged to the main connecting member 1; in the direction parallel to the hinge axis between the main connecting member 1 and the secondary connecting member 2, the secondary fixed plate 210 and the first secondary hinge plate 220, as well as the first secondary hinge plate 220 and the second secondary hinge plate 230 are staggered to form a step structure. In this embodiment, the auxiliary connecting member 2 is designed in sections, and the connection with the auxiliary backdoor 6 is achieved through the auxiliary fixing plate 210; due to the step setting between the auxiliary fixing plate 210 and the first auxiliary hinge plate 220, a certain hinge operation space can be generated between the first auxiliary hinge plate 220 and the auxiliary backdoor 6, so that the hinge connection with the folding and telescopic member 4 can be achieved while avoiding interference between the hinge structure and the auxiliary backdoor 6; due to the step setting between the first auxiliary hinge plate 220 and the second auxiliary hinge plate 230, a certain hinge operation space can be generated between the second auxiliary hinge plate 230 and the auxiliary backdoor 6, so that the hinge connection with the auxiliary connecting member 2 and the main connecting member 1 can be achieved while avoiding interference between the hinge structure and the auxiliary backdoor 6; in addition, the design of the step-shaped plate also enhances the overall structural strength of the auxiliary connecting member 2, thereby ensuring its reliability in use.

[0051] Based on the above embodiments, see Figures 1 to 4 In the case where the first secondary hinge plate 220 and the secondary fixed plate 210 are offset, since the first secondary hinge plate 220 is not directly attached to the secondary back door 6, the folding driving force provided by the folding telescopic member 4 is mainly concentrated on the first secondary hinge plate 220, and the gravity of the secondary back door 6 directly acts on the secondary fixed plate 210, so that the first secondary hinge plate 220 and the secondary fixed plate 210 are subjected to opposite forces, and deformation is easily generated in the intersection area of ​​the two. In this embodiment, by forming a secondary reinforcing rib 240 in the intersection area of ​​the first secondary hinge plate 220 and the secondary fixed plate 210, the structural strength of the area is effectively enhanced to avoid deformation problems.

[0052] Under the premise that the back door folding structure adopts the edge setting mode, the back door folding structure also includes a switch support frame 8, such as Figures 1 to 6 As shown, the switch support frame 8 has a first support plate 810 and a second support plate 820. The first support plate 810 is fitted and connected to the edge of the vehicle body, and the second support plate 820 is set at an angle to the first support plate 810 and is hinged to the switch telescopic member 3. In this embodiment, the first support plate and the second support plate are respectively adapted to the vehicle body and the switch telescopic member 3, so as to better adapt to the hinged assembly requirements between the switch telescopic member 3 and the vehicle body and reduce the assembly difficulty of the switch telescopic member 3. In specific implementation, the first support plate 810 can be fitted and connected to the open end face of the rear opening of the passenger compartment, and the telescopic path of the switch telescopic member 3 is roughly perpendicular to the left and right directions. At this time, the angle between the first support plate 810 and the second support plate 820 is close to a right angle (such as Figures 1 to 6 Of course, the included angle between the first support plate 810 and the second support plate 820 may also be other angles, which is not limited here.

[0053] Based on the above embodiments, see Figures 2 to 4 In order to enhance the structural strength of the second support plate 820 and avoid the problem of deformation of the second support plate 820 caused by the force of the switch telescopic member 3, a reinforcing boss 830 is formed on the second support plate 820. The reinforcing boss 830 extends to the intersection of the second support plate 820 and the first support plate 810, and the switch telescopic member 3 is hinged to the reinforcing boss 830.

[0054] On the basis of being provided with the reinforcing boss 830, the width of the second support plate 820 gradually decreases in the direction away from the first support plate 810, so that the second support plate 820 forms a triangular or trapezoidal plate structure. The triangle or trapezoid has the characteristic of high structural stability, so as to enhance the load-bearing capacity of the second support plate 820 in the direction parallel to its own plate surface, enhance the bonding strength between the lifting and telescopic parts and the vehicle body, and provide firm support for the lifting and telescopic parts during the lifting and lowering process to prevent its shaking from affecting the stability of the rear door when opening and closing.

[0055] In some specific embodiments of the first support plate 810, a plurality of fixing holes 811 are provided on the first support plate 810, and the first support plate 810 is fixedly connected to the vehicle body by fasteners (such as threaded fasteners) penetrating the fixing holes 811. The first support plate 810 has many connection points with the vehicle body, and after installation, the position of the first support plate 810 is firm and will not rotate or deflect.

[0056] It should be understood that a folding support frame similar to the above-mentioned switch support frame 8 can also be set between the folding telescopic member 4 and the vehicle body to better adapt to the hinged assembly requirements between the folding telescopic member 4 and the vehicle body and reduce the difficulty of assembly. The specific structure of the folding support frame will not be repeated here.

[0057] See also Figure 1 In some embodiments, the hinge point between the switch telescopic member 3 and the vehicle body is defined as the first hinge point 9, and the hinge point between the folding telescopic member 4 and the vehicle body is defined as the second hinge point 10. The first hinge point 9 is located between the second hinge point 10 and the hinge axis between the main back door 5 and the vehicle body, and the switch telescopic member 3 and the folding telescopic member 4 are staggered in the direction parallel to the hinge axis of the main connecting member 1 and the auxiliary connecting member 2. In this embodiment, the switch telescopic member 3 and the folding telescopic member 4 are staggered to avoid mutual interference between the switch telescopic member 3 and the folding telescopic member 4 during the door opening and closing process; and, by reasonably setting the positions of the first hinge point 9 and the second hinge point 10, the cross setting of the switch telescopic member 3 and the folding telescopic member 4 is avoided, which helps to shorten the axial dimensions of the switch telescopic member 3 and the folding telescopic member 4, and realize the miniaturization and lightweight design of the overall back door folding structure.

[0058] Based on the same inventive concept, the present application embodiment further provides a folding back door assembly, see Figure 5 and Figure 6 The foldable back door assembly includes a main back door 5, a secondary back door 6, and the above-mentioned back door folding structure, and one side of the main back door 5 is hinged to the vehicle body.

[0059] Compared with the prior art, the foldable tailgate assembly provided in this embodiment can realize full-angle and smooth opening of the tailgate in a narrow space by adopting the above-mentioned tailgate folding structure, thereby improving the convenience of taking and placing items from the trunk in a narrow space.

[0060] See also Figure 5 and Figure 6 In some embodiments, the main connecting member 1 is connected to the side of the main back door 5, and the opening and closing telescopic member 3 is connected to the edge of the corresponding side of the vehicle body; the secondary connecting member 2 is connected to the side of the secondary back door 6, and the folding and telescopic member 4 is connected to the edge of the corresponding side of the vehicle body (specifically, the edge of the rear opening of the passenger compartment). This embodiment realizes the edge setting of the lifting and closing telescopic member and the folding and telescopic member 4 through the edge setting of the main connecting member 1 and the secondary connecting member 2, and minimizes the encroachment of the back door folding structure on the rear opening space of the passenger compartment, thereby optimizing the convenience of taking and placing items, and avoiding bumping into the back door folding structure when taking and placing items; at the same time, the back door folding structure also makes full use of the gap between the back door and the vehicle body, which does not affect the opening and closing of the door and the folding action.

[0061] Based on the same inventive concept, an embodiment of the present application also provides a vehicle, including the above-mentioned folding tailgate assembly.

[0062] Compared with the prior art, the vehicle provided in this embodiment improves the convenience of taking and placing items from the trunk in a small space by adopting the above-mentioned folding tailgate assembly, thereby improving the quality of the entire vehicle and the driving experience.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A back door folding structure, characterized in that: It comprises a main connecting member (1), a secondary connecting member (2), a switch telescopic member (3) and a folding telescopic member (4); The main connecting member (1) is connected to the main back door (5), and the secondary connecting member (2) is connected to the secondary back door (6). The main connecting member (1) and the secondary connecting member (2) are hinged to realize the hinge connection between the main back door (5) and the secondary back door (6), and the hinge axis between the main connecting member (1) and the secondary connecting member (2) is parallel to the hinge axis between the main back door (5) and the vehicle body; The two ends of the switch telescopic member (3) are respectively hinged to the vehicle body and the main connecting member (1), and the two ends of the folding telescopic member (4) are respectively hinged to the vehicle body and the auxiliary connecting member (2).

2. The back door folding structure according to claim 1, characterized in that: The switch telescopic member (3) and the vehicle body, the switch telescopic member (3) and the main connecting member (1), the folding telescopic member (4) and the vehicle body, and the folding telescopic member (4) and the auxiliary connecting member (2) are all connected via ball joints (7).

3. The back door folding structure according to claim 1, characterized in that: The main connecting member (1) comprises a main fixed plate (110), a first main hinge plate (120) and a second main hinge plate (130) which are connected in sequence, the main fixed plate (110) is closely connected to the side of the main back door (5), the first main hinge plate (120) is hinged to the switch telescopic member (3), and the second main hinge plate (130) is hinged to the auxiliary connecting member (2); in a direction parallel to the hinge axis between the main connecting member and the auxiliary connecting member, the main fixed plate (110) and the first main hinge plate (120), as well as the first main hinge plate (120) and the second main hinge plate (130) are staggered to form a step structure.

4. The back door folding structure according to claim 3, characterized in that: A main reinforcing rib (140) is formed at the intersection area of ​​the first main hinge plate (120) and the main fixing plate (110).

5. The back door folding structure according to claim 1 or 3, characterized in that: The secondary connecting member (2) comprises a secondary fixing plate (210), a first secondary hinge plate (220) and a second secondary hinge plate (230) which are connected in sequence; the secondary fixing plate (210) is closely connected to the side of the secondary back door (6); the first secondary hinge plate (220) is hinged to the folding and telescopic member (4); and the second secondary hinge plate (230) is hinged to the main connecting member (1); in a direction parallel to the hinge axis between the main connecting member and the secondary connecting member, the secondary fixing plate (210) and the first secondary hinge plate (220), as well as the first secondary hinge plate (220) and the second secondary hinge plate (230) are staggered to form a step structure.

6. The back door folding structure according to claim 1, characterized in that: The tailgate folding structure also includes a switch support frame (8), the switch support frame (8) having a first support plate (810) and a second support plate (820), the first support plate (810) being closely connected to the edge of the vehicle body, the second support plate (820) being arranged at an angle to the first support plate (810) and being hinged to the switch telescopic member (3).

7. The back door folding structure according to claim 6, characterized in that: The second support plate (820) is provided with a reinforcing boss (830), and the switch telescopic member (3) is hinged to the reinforcing boss (830).

8. The back door folding structure according to claim 1, characterized in that: The hinge point between the switch telescopic member (3) and the vehicle body is defined as a first hinge point (9), and the hinge point between the folding telescopic member (4) and the vehicle body is defined as a second hinge point (10). The first hinge point (9) is located between the second hinge point (10) and the hinge axis between the main tailgate (5) and the vehicle body, and the switch telescopic member (3) and the folding telescopic member (4) are staggered in a direction parallel to the hinge axis of the main connecting member (1) and the auxiliary connecting member (2).

9. A folding back door assembly, characterized in that: It comprises a main back door (5), an auxiliary back door (6), and a back door folding structure as claimed in any one of claims 1 to 8, wherein one side of the main back door (5) is hinged to the vehicle body.

10. A vehicle, characterized in that: It comprises a folding tailgate assembly as claimed in claim 9.

Images