Back door assembly and vehicle

Abstract

The utility model provides a back door assembly and a vehicle, and belongs to the technical field of vehicle parts, the back door assembly comprises a main back door, an auxiliary back door, a main connecting piece and an auxiliary connecting piece; one side of the main back door is rotationally connected with a vehicle body, the main connecting piece is connected to the circumferential side face of the main back door, the auxiliary connecting piece is connected to the circumferential side face of the auxiliary back door, the main connecting piece and the auxiliary connecting piece are hinged through a hinge shaft, the hinge shaft is located on the free swing side of the main back door, and the hinge shaft is parallel to a rotating shaft between the main back door and the vehicle body. According to the utility model, the space required for opening the door is reduced, the effect of opening the back door at all angles in a narrow space is realized, and the back door is prevented from colliding with a rear barrier; and the folding degree of the auxiliary back door can be increased, the included angle between the main back door and the auxiliary back door after complete folding is reduced, and finally the problem that the auxiliary back door collides with the head of a user when articles are taken and placed is solved.

Description

Technical Field

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

[0002] The rear door of a hatchback car can be opened in two ways, including the hatchback and side-opening, which require the rear door to flip backwards as a whole. When the rear door is fully opened, it takes up a lot of space behind the car body. If there is an obstacle behind the car body, it will affect the opening degree of the rear door, causing the rear door to be unable to open at full angles, or even causing scratches and bumps on the rear door, which not only causes inconvenience in taking and putting things, but also may increase vehicle maintenance costs, directly affecting the car experience. Utility Model Content

[0003] The embodiment of the utility model provides a tailgate assembly and a vehicle, aiming to solve the problem in the prior art that the tailgate cannot be opened to a full angle after being opened, or even scrapes against obstacles behind.

[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 assembly, comprising:

[0006] Main back door, auxiliary back door, main connecting parts and auxiliary connecting parts;

[0007] One side of the main tailgate is rotatably connected to the vehicle body, the main connecting member is connected to the circumferential side of the main tailgate, the secondary connecting member is connected to the circumferential side of the secondary tailgate, the main connecting member and the secondary connecting member are hinged via a hinge shaft, and the hinge shaft is located on the free swinging side of the main tailgate, and the hinge shaft is parallel to the rotating shaft between the main tailgate and the vehicle body.

[0008] In combination with the first aspect, in a possible implementation, the main connecting member includes a main door panel and a first main hinge plate connected in sequence, the main door panel is fitted and connected to the circumferential side of the main back door, and the first main hinge plate is hinged to the secondary connecting member through the hinge shaft; the first main hinge plate and the main door panel are distributed in a step-like manner, and in the axial direction of the hinge shaft, the first main hinge plate protrudes from the main door panel in a direction away from the main back door.

[0009] In some embodiments, the rear door assembly further includes a main telescopic member, the main connecting member further includes a second main hinge plate connected between the main door panel and the first main hinge plate, and two ends of the main telescopic member are respectively hinged to the second main hinge plate and the vehicle body;

[0010] The first main hinge plate and the second main hinge plate, as well as the second main hinge plate and the main door plate are distributed in a step shape.

[0011] In some embodiments, in the axial direction of the hinge shaft, the first main hinge plate protrudes beyond the second main hinge plate in a direction away from the main back door, and the second main hinge plate protrudes beyond the main door plate in a direction away from the main back door.

[0012] In some embodiments, a main reinforcing rib is provided in the connection area between the main door panel and the second main hinge plate.

[0013] In some embodiments, the secondary connecting member includes a secondary door plate and a first secondary hinge plate connected in sequence, the secondary door plate is fitted and connected to the circumferential side of the secondary back door, and the first secondary hinge plate is hinged to the main connecting member through the hinge shaft; the first secondary hinge plate and the secondary door plate are distributed in a step-like manner, and in the axial direction of the hinge shaft, the first secondary hinge plate protrudes from the secondary door plate in a direction away from the secondary back door.

[0014] In some embodiments, the rear door assembly further includes a secondary telescopic member, the secondary connecting member further includes a second secondary hinge plate connected between the secondary door plate and the first secondary hinge plate, and two ends of the secondary telescopic member are respectively hinged to the second secondary hinge plate and the vehicle body;

[0015] The first secondary hinge plate and the second secondary hinge plate, as well as the second secondary hinge plate and the secondary door plate are both distributed in a step shape.

[0016] In some embodiments, a secondary reinforcing rib is provided at a connection area between the secondary door panel and the second secondary hinge plate.

[0017] In some embodiments, the step vertical plate between the second secondary hinge plate and the first secondary hinge plate is defined as the second secondary vertical plate, and the second secondary vertical plate extends in its own width direction in a direction inclined to a second preset path, and the second preset path is the distribution path of the second secondary hinge plate and the first secondary hinge plate.

[0018] Compared with the prior art, the solution shown in the embodiment of the present application is that the tailgate is set up separately, and the main tailgate and the auxiliary tailgate are manufactured separately. The main tailgate and the auxiliary tailgate are hinged by the hinge between the main connecting member and the auxiliary connecting member. When the door needs to be opened, the auxiliary tailgate is driven to flip backward by the main tailgate, and at the same time, the auxiliary tailgate is flipped forward around the hinge axis between the main connecting member and the auxiliary connecting member, so that the auxiliary tailgate is folded relative to the main tailgate. This effectively shortens the overall flipping radius of the tailgate, and the space required for the backward flipping can be adapted to the size of the main tailgate, which effectively reduces the space required for opening the door, thereby achieving the effect of opening the tailgate at full angles in a narrow space and preventing the tailgate from hitting obstacles at the rear. In addition, the main connecting member, the secondary connecting member and the hinge axis form a hinge structure. Since the main connecting member and the secondary connecting member are respectively arranged on the circumferential side of the main back door and the circumferential side of the secondary back door, the hinge structure as a whole is located on the side of the back door. While meeting the folding and unfolding requirements, the hinge structure is avoided from occupying the space in front of the main back door and the secondary back door, thereby avoiding the hinge structure from hindering the flipping of the secondary back door, increasing the folding degree of the secondary back door, and reducing the angle between the main back door and the secondary back door after they are fully folded, ultimately avoiding the problem of the secondary back door hitting the user's head when taking and placing items.

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

[0020] Compared with the prior art, the solution shown in the embodiment of the present application achieves the effect of opening the back door at full angles in a narrow space by adopting the above-mentioned back door assembly, which facilitates the taking and placing of items, avoids the back door from hitting obstacles behind, reduces the maintenance cost of the back door, and can also avoid the problem of the secondary back door hitting the user's head when taking and placing items, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional assembly diagram of the main connecting member, the hinge shaft and the secondary connecting member used in the first embodiment of the utility model;

[0022] Figure 2 The main connecting member, hinge shaft, secondary connecting member and ball joint assembly stereogram used in the second embodiment of the utility model Figure 1 , wherein the main connecting member and the secondary connecting member are in an expanded state;

[0023] Figure 3 The main connecting member, hinge shaft, secondary connecting member and ball joint assembly stereogram used in the second embodiment of the utility model Figure 2 , wherein the main connecting member and the secondary connecting member are in a folded state;

[0024] Figure 4 The assembly stereogram of the main connecting member, the hinge shaft, the secondary connecting member, the main telescopic member and the secondary telescopic member used in the third embodiment of the utility model Figure 1, wherein the main connecting member and the secondary connecting member are in an expanded state;

[0025] Figure 5 The assembly stereogram of the main connecting member, the hinge shaft, the secondary connecting member, the main telescopic member and the secondary telescopic member used in the third embodiment of the utility model Figure 2 , wherein the main connecting member and the secondary connecting member are in a folded state;

[0026] Figure 6 This is an exploded view of the main connecting member, the ball joint and the main telescopic member used in the third embodiment of the present utility model;

[0027] Figure 7 The assembly diagram of the rear door assembly used in the fourth embodiment of the present utility model is shown in FIG. Figure 1 , wherein the main back door and the auxiliary back door are in the unfolded state;

[0028] Figure 8 The assembly diagram of the rear door assembly used in the fourth embodiment of the present utility model is shown in FIG. Figure 2 , wherein the main back door and the auxiliary back door are in a folded state;

[0029] Description of reference numerals:

[0030] 1. Main back door; 2. Auxiliary back door; 3. Main connecting part; 310. Main door panel; 320. First main hinge plate; 330. Second main hinge plate; 340. Main reinforcing rib; 350. Second main vertical plate; 4. Auxiliary connecting part; 410. Auxiliary door panel; 420. First auxiliary hinge plate; 430. Second auxiliary hinge plate; 440. Auxiliary reinforcing rib; 450. Second auxiliary vertical plate; 5. Hinge shaft; 6. Main telescopic part; 7. Auxiliary telescopic part; 8. Ball joint; 810. Ball seat; 820. Ball pin; 821. Ball head. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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".

[0036] 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.

[0037] Please also read Figures 1 to 8 The back door assembly provided by the utility model is now described. The back door assembly includes a main back door 1, a secondary back door 2, a main connecting member 3 and a secondary connecting member 4; one side of the main back door 1 is rotatably connected to the vehicle body, the main connecting member 3 is connected to the circumferential side of the main back door 1, and the secondary connecting member 4 is connected to the circumferential side of the secondary back door 2. The main connecting member 3 and the secondary connecting member 4 are hinged through a hinge shaft 5, and the hinge shaft 5 is located on the free swing side of the main back door 1, and the hinge shaft 5 is parallel to the rotation axis between the main back door 1 and the vehicle body.

[0038] The back door assembly 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 1 is rotatably connected to the vehicle body (specifically, the upper part of the rear opening of the passenger compartment), and the rotation axis is arranged in the left-right direction. The main connecting member 3 is connected to the circumferential side surface of the lower part of the main back door 1 (i.e., a side surface of the main back door 1 adjacent to the rotation axis), and the secondary connecting member 4 is connected to the circumferential side surface of the upper part of the secondary back door 2 (i.e., arranged on the same side as the main connecting member 3), and the hinge axis 5 between the main connecting member 3 and the secondary connecting member 4 is arranged in the left-right direction. Taking a side-opening back door as an example, the left edge of the main back door 1 is rotatably connected to the vehicle body (specifically, the left side of the rear opening of the passenger compartment), and the rotation axis is arranged in the up-down direction. The main connecting member 3 is located on the circumferential side surface of the right side of the main back door 1, and the secondary connecting member 4 is connected to the circumferential side surface of the left side of the secondary back door 2, and the hinge axis 5 is arranged in the up-down direction. 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 1 and a secondary back door 2, or only the door body on one side includes a main back door 1 and a secondary back door 2. 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 main connecting member 3 is located on the left and / or right side of the main back door 1, and the secondary connecting member 4 is located on the left and / or right side of the secondary back door 2.

[0039] It should also be noted that the main connecting member 3, the secondary connecting member 4 and the hinge shaft 5 form a hinge structure, which may be only on one side of the tailgate; or, hinge structures are provided on both sides of the tailgate, so that the tailgate obtains double-sided hinge limit and more stable force.

[0040] Compared with the prior art, the tailgate assembly provided in the present embodiment is provided with a split tailgate, namely a main tailgate 1 and a secondary tailgate 2 are manufactured separately, and the main tailgate 1 and the secondary tailgate 2 are hinged by the hinge between the main connecting member 3 and the secondary connecting member 4. When the door needs to be opened, the secondary tailgate 2 is driven to flip backward by the main tailgate 1, and at the same time, the secondary tailgate 2 is flipped forward around the hinge shaft 5 between the main connecting member 3 and the secondary connecting member 4, so that the secondary tailgate 2 is folded relative to the main tailgate 1, which effectively shortens the overall flipping radius of the tailgate, and the space required for the backward flipping can be adapted to the size of the main tailgate 1, which effectively reduces the space required for opening the door, and realizes the effect of opening the tailgate at all angles in a narrow space, while preventing the tailgate from hitting obstacles at the rear. In addition, the main connecting member 3, the secondary connecting member 4 and the hinge shaft 5 form a hinge structure. Since the main connecting member 3 and the secondary connecting member 4 are respectively arranged on the circumferential side of the main back door 1 and the circumferential side of the secondary back door 2, the hinge structure as a whole is located on the side of the back door. While meeting the folding and unfolding requirements, the hinge structure is avoided from occupying the space in front of the main back door 1 and the secondary back door 2, thereby avoiding the hinge structure from hindering the flipping of the secondary back door 2, increasing the folding degree of the secondary back door 2, and reducing the angle between the main back door 1 and the secondary back door 2 after they are fully folded, ultimately avoiding the problem of the secondary back door 2 hitting the user's head when taking and placing items.

[0041] In some embodiments, the main connecting member 3 may be Figures 1 to 8 In the structure shown, the main connecting member 3 includes a main door plate 310 and a first main hinge plate 320 connected in sequence. The main door plate 310 is fitted and connected to the circumferential side of the main back door 1. The first main hinge plate 320 is hinged to the secondary connecting member 4 through the hinge shaft 5. The first main hinge plate 320 and the main door plate 310 are distributed in a step-like manner, and in the axial direction of the hinge shaft 5, the first main hinge plate 320 protrudes from the main door plate 310 in a direction away from the main back door 1. In this embodiment, the main connecting member 3 is designed in sections, and the fitting connection with the main back door 1 is achieved through the main door plate 310. Due to the step setting between the main door plate 310 and the first main hinge plate 320, a certain hinge operation space can be generated between the first main hinge plate 320 and the main back door 1, and while realizing the hinge connection with the secondary connecting member 4, interference between the hinge area and the main back door 1 is avoided. In addition, the design of the step-like plate also enhances the overall structural strength of the main connecting member 3, ensuring its reliability in use.

[0042] Based on the above embodiments, see Figures 4 to 8 The back door assembly also includes a main telescopic member 6, and the main connecting member 3 also includes a second main hinge plate 330 connected between the main door panel 310 and the first main hinge plate 320. The two ends of the main telescopic member 6 are respectively hinged to the second main hinge plate 330 and the vehicle body; the first main hinge plate 320 and the second main hinge plate 330, as well as the second main hinge plate 330 and the main door panel 310 are distributed in a step shape. The main door panel 310 is perpendicular to the hinge axis 5.

[0043] In the closed state, the auxiliary back door 2 and the main back door 1 are fully extended (such as Figure 7 As shown in the figure, the main telescopic member 6 is in the minimum length state; during the door opening process, the main telescopic member 6 gradually extends, driving the main back door 1 to rotate backward and open through the main connecting member 3, and at the same time, driving the secondary back door 2 to gradually rotate and fold forward through the secondary connecting member 4, thereby shortening the length of the back door after opening. Figure 8 That is, it shows an instantaneous state of the main back door 1 and the auxiliary back door 2 during the door opening process; the door can be closed by reverse operation. The main telescopic member 6 is provided to provide driving and supporting force for the overall opening and closing of the back door, thereby improving the stability and smoothness of opening and closing the door. Based on this, the main connecting member 3 also has a second main hinge plate 330. Since the first main hinge plate 320 and the second main hinge plate 330, as well as the second main hinge plate 330 and the main door plate 310 are distributed in a step-like manner, a certain hinge operation space can be generated between the second main hinge plate 330 and the main back door 1, so that the main connecting member 3 and the main telescopic member 6 can be hinged while avoiding interference between the hinge area and the main back door 1.

[0044] In some more specific distribution modes of the step structure in the main connecting member 3, in the axial direction of the hinge shaft 5, the first main hinge plate 320 protrudes from the second main hinge plate 330 in a direction away from the main back door 1, and the second main hinge plate 330 protrudes from the main door plate 310 in a direction away from the main back door 1, such as Figures 1 to 6 In this embodiment, a step structure that rises in sequence in the direction away from the main back door 1 is formed between the main door plate 310, the second main hinge plate 330 and the first main hinge plate 320, so that a larger hinge assembly space is formed between the main connecting member 3 and the secondary connecting member 4, so as to form a higher strength hinge assembly structure between the main connecting member 3 and the secondary connecting member 4, ensuring that the main connecting member 3 and the secondary connecting member 4 will not be deformed after the secondary back door 2 is repeatedly folded and unfolded, thereby extending the service life of the main connecting member 3 and the secondary connecting member 4.

[0045] In some more specific distribution modes of the step structure in the main connecting member 3, in the axial direction of the hinge shaft 5, the second main hinge plate 330 protrudes from the first main hinge plate 320 in the direction away from the main back door 1, and the second main hinge plate 330 protrudes from the main door plate 310 in the direction away from the main back door 1. In this embodiment, a protruding "J"-shaped structure (not shown in the figure) is formed in the middle (i.e., the second main hinge plate 330) between the main door plate 310, the second main hinge plate 330 and the first main hinge plate 320, which has higher structural strength, can better support the force from the main telescopic member 6, ensure that the main connecting member 3 will not be deformed after the main back door 1 is opened and closed many times, and extend the service life of the main connecting member 3.

[0046] On the basis of providing the second main hinge plate 330, see Figures 1 to 6In the case where the second main hinge plate 330 and the main door panel 310 are misaligned, since the second main hinge plate 330 is not directly connected to the main back door 1, the opening and closing driving force provided by the main telescopic member 6 is mainly concentrated on the second main hinge plate 330, and the gravity of the main back door 1 directly acts on the main door panel 310, so that the second main hinge plate 330 and the main door panel 310 are subjected to opposite forces, and deformation is easily generated in the intersection area of ​​the two. In this embodiment, the main reinforcing rib 340 is provided in the connection area between the main door panel 310 and the second main hinge plate 330, so as to effectively enhance the structural strength of the area and avoid deformation problems.

[0047] In some embodiments, the step vertical plate between the second main hinge plate 330 and the first main hinge plate 320 is defined as the second main vertical plate 350, and the second main vertical plate 350 is inclined to the first preset path in its own height direction, and the first preset path is the distribution path of the second main hinge plate 330 and the first main hinge plate 320; more specifically, the second main vertical plate 350 can also extend in a direction inclined to the first preset path in its own width direction. This arrangement enables the first main hinge plate 320 and the second main hinge plate 330 to form a plate similar to a trapezoid, thereby improving the structural strength of the two plates, which helps to improve the structural strength of the main connecting member 3. Similarly, the step vertical plate between the second main hinge plate 330 and the main door panel 310 can also adopt a similar arrangement, which will not be repeated here.

[0048] In some embodiments, the secondary connector 4 may be Figures 1 to 5 In the structure shown, the secondary connecting member 4 includes a secondary door plate 410 and a first secondary hinge plate 420 connected in sequence. The secondary door plate 410 is fitted and connected to the circumferential side of the secondary back door 2, and the first secondary hinge plate 420 is hinged to the main connecting member 3 through the hinge shaft 5; the first secondary hinge plate 420 and the secondary door plate 410 are distributed in a step-like manner, and in the axial direction of the hinge shaft 5, the first secondary hinge plate 420 protrudes from the secondary door plate 410 in a direction away from the secondary back door 2. In this embodiment, the secondary connecting member 4 is designed in sections, and the fitting connection with the secondary back door 2 is achieved through the secondary door plate 410; due to the step setting between the secondary door plate 410 and the first secondary hinge plate 420, a certain hinge operation space can be generated between the first secondary hinge plate 420 and the secondary back door 2, and while realizing the hinge connection with the main connecting member 3, interference between the hinge area and the main back door 1 is avoided; in addition, the design of the step-like plate also enhances the overall structural strength of the secondary connecting member 4, ensuring its reliability in use.

[0049] Based on the above embodiments, see Figures 4 to 8The back door assembly further includes a secondary telescopic member 7, the secondary connecting member 4 further includes a second secondary hinge plate 430 connected between the secondary door panel 410 and the first secondary hinge plate 420, and the two ends of the secondary telescopic member 7 are respectively hinged to the second secondary hinge plate 430 and the vehicle body; the first secondary hinge plate 420 and the second secondary hinge plate 430, as well as the second secondary hinge plate 430 and the secondary door panel 410 are both distributed in a step shape. The secondary door panel 410 is perpendicular to the hinge axis 5.

[0050] In the closed state, the secondary back door 2 and the main back door 1 are fully unfolded, and the secondary telescopic member 7 is at the maximum length state; while the main back door 1 rotates backward to open, the secondary telescopic member 7 gradually shortens, and drives the secondary back door 2 to gradually rotate forward and fold through the secondary connecting member 4, shortening the length of the back door after opening; the door can be closed by reverse operation. The secondary telescopic member 7 is provided to provide driving and supporting force for the folding of the back door, thereby improving the stability and smoothness of the folding and unfolding process. Based on this, the secondary connecting member 4 also has a second secondary hinge plate 430. Since the first secondary hinge plate 420 and the second secondary hinge plate 430, as well as the second secondary hinge plate 430 and the secondary door plate 410 are distributed in a step-like manner, a certain hinge operation space can be generated between the second secondary hinge plate 430 and the secondary back door 2, so that the hinged connection with the secondary connecting member 4 and the secondary telescopic member 7 can be achieved while avoiding interference between the hinged area and the secondary back door 2.

[0051] In some more specific distribution modes of the step structure in the secondary connecting member 4, in the axial direction of the hinge shaft 5, the first secondary hinge plate 420 protrudes from the second secondary hinge plate 430 in a direction away from the secondary back door 2, and the second secondary hinge plate 430 protrudes from the secondary door plate 410 in a direction away from the secondary back door 2, such as Figure 1 and Figure 5 In this embodiment, a step structure that rises in sequence in the direction away from the auxiliary back door 2 is formed between the auxiliary door plate 410, the second auxiliary hinge plate 430 and the first auxiliary hinge plate 420, so that a larger hinge assembly space is formed between the auxiliary connecting member 4 and the main connecting member 3, so as to form a higher strength hinge assembly structure between the auxiliary connecting member 4 and the main connecting member 3, ensuring that the main connecting member 3 and the auxiliary connecting member 4 will not be deformed after the auxiliary back door 2 is repeatedly folded and unfolded, thereby extending the service life of the main connecting member 3 and the auxiliary connecting member 4.

[0052] In some more specific distribution modes of the step structure in the secondary connection member 4, in the axial direction of the hinge shaft 5, the second secondary hinge plate 430 protrudes from the first secondary hinge plate 420 in the direction away from the main back door 1, and the second secondary hinge plate 430 protrudes from the secondary door plate 410 in the direction away from the secondary back door 2. In this embodiment, a "J"-shaped structure with a protruding middle (i.e., the second secondary hinge plate 430) is formed between the secondary door plate 410, the second secondary hinge plate 430 and the first secondary hinge plate 420, which has a higher structural strength and can better support the force from the secondary telescopic member 7, ensuring that the secondary connection member 4 will not be deformed after the secondary back door 2 is folded and unfolded for many times, thereby extending the service life of the secondary connection member 4.

[0053] On the basis of providing the second auxiliary hinge plate 430, see Figures 1 to 5 In the case where the second secondary hinge plate 430 is misaligned with the secondary door panel 410, since the second secondary hinge plate 430 is not directly connected to the secondary back door 2, the folding driving force provided by the secondary telescopic member 7 is mainly concentrated on the second secondary hinge plate 430, and the gravity of the secondary back door 2 directly acts on the secondary door panel 410, so that the second secondary hinge plate 430 and the secondary door panel 410 are subjected to opposite forces, and deformation is easily generated in the intersection area of ​​the two. In this embodiment, a secondary reinforcing rib 440 is provided in the connection area between the secondary door panel 410 and the second secondary hinge plate 430, so as to effectively enhance the structural strength of the area and avoid deformation problems.

[0054] In some embodiments, the step vertical plate between the second secondary hinge plate 430 and the first secondary hinge plate 420 is defined as the second secondary vertical plate 450, and the second secondary vertical plate 450 extends in a direction inclined to the second preset path in its width direction, and the second preset path is the distribution path of the second secondary hinge plate 430 and the first secondary hinge plate 420; more specifically, the second secondary vertical plate 450 can also extend in a direction inclined to the second preset path in its height direction. This arrangement enables the first secondary hinge plate 420 and the second secondary hinge plate 430 to form a plate similar to a trapezoid, thereby improving the structural strength of the two plates, which helps to improve the structural strength of the secondary connector 4. Similarly, the step vertical plate between the second secondary hinge plate 430 and the secondary door plate 410 can also adopt a similar arrangement, which will not be repeated here.

[0055] It should be noted that the solution of providing the main telescopic member 6 and the solution of providing the auxiliary telescopic member 7 can be used separately or in combination.

[0056] When used in combination, in the structure on the same side, the main telescopic part 6 and the auxiliary telescopic part 7 can be in a one-to-one corresponding quantity relationship, or one main telescopic part 6 corresponds to at least two auxiliary telescopic parts 7 (wherein, at least two auxiliary telescopic parts 7 need to be arranged parallel to each other), or at least two main telescopic parts 6 correspond to one auxiliary telescopic part 7 (wherein, at least two main telescopic parts 6 need to be arranged parallel to each other).

[0057] When used in combination, the main telescopic member 6 and the auxiliary telescopic member 7 are implemented as follows:

[0058] 1) Both the main telescopic member 6 and the auxiliary telescopic member 7 are electrically controlled components (e.g. electric push rods), and the two are respectively connected to a control unit (e.g. a driving computer). After the main telescopic member 6 and the auxiliary telescopic member 7 receive a door opening instruction, the main telescopic member 6 extends and the auxiliary telescopic member 7 shortens until the main telescopic member 6 extends to the maximum length and the auxiliary telescopic member 7 shortens to the minimum length. At this time, the rear door is fully open; the door can be closed by reverse control.

[0059] 2) Both the main telescopic member 6 and the auxiliary telescopic member 7 are manually controlled components (such as gas-strut damping telescopic rods). The user pulls the main back door 1 by hand to make the main back door 1 flip backward, and at the same time pushes the auxiliary back door 2 by hand to make the auxiliary back door 2 flip forward and fold until the main telescopic member 6 is extended to the maximum length and the auxiliary telescopic member 7 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.

[0060] 3) One of the main telescopic member 6 and the auxiliary telescopic member 7 is an electrically controlled member, and the other is a manually controlled member. During operation, the steps of the above two implementation methods can be combined with each other, which will not be repeated here.

[0061] The articulation between the main telescopic member 6 and the vehicle body, between the main telescopic member 6 and the main connecting member 3, between the auxiliary telescopic member 7 and the vehicle body, and between the auxiliary telescopic member 7 and the auxiliary connecting member 4 can be realized by a hinge shaft 5 component that can only rotate in both directions, but this articulation method cannot produce displacement or deflection along the axial direction of the hinge shaft 5, and has strict requirements on the location of the main telescopic member 6 and the auxiliary telescopic member 7. In order to reduce the design and assembly difficulty of the hinged folding area, in some embodiments, the main telescopic member 6 and the vehicle body, the main telescopic member 6 and the main connecting member 3, the auxiliary telescopic member 7 and the vehicle body, and the auxiliary telescopic member 7 and the auxiliary connecting member 4 are all connected by a ball joint 8, such as Figures 4 to 8 The ball joint 8 structure can not only produce self-rotation, but also swing at multiple angles, so that the main telescopic member 6 and the auxiliary telescopic member 7 have more freedom of movement during the telescopic process, and the requirements for the location of the main telescopic member 6 and the auxiliary telescopic member 7 are relatively low, which facilitates more effective use of the space inside the vehicle and reduces the difficulty of design and assembly.

[0062] Specifically, the ball joint 8 includes a ball seat 810 and a ball pin 820, and the ball head 821 of the ball pin 820 is placed in the ball socket formed by the ball seat 810. In order to facilitate assembly, the ball seats 810 are respectively arranged at both ends of the main telescopic member 6, and the opening direction of the ball seat 810 is arranged at an angle (for example, an angle of 80°, 90°, or 95°) with the telescopic path of the main telescopic member 6, one end of the ball pin 820 is fixed to the second main hinge plate 330 or the vehicle body, and the ball head 821 at the other end is placed in the ball socket corresponding to the ball seat 810; the ball joint 8 on the auxiliary telescopic member 7 is also arranged in a similar manner. By adopting this arrangement, the space at both ends of the main telescopic member 6 and the auxiliary telescopic member 7 is fully utilized, and a socket is respectively provided on the end face of each telescopic member, and the ball seat 810 is directly inserted and fixed in the corresponding socket, which is very convenient to install. In addition, this installation method can keep the overall external dimensions of the ball seat 810 in the axial direction relatively uniform, avoid the occurrence of weakening structures such as bending and shrinkage, and is conducive to ensuring the overall structural strength of the ball seat 810; at the same time, the arrangement of the ball pin 820 is also relatively simple, and the overall bending structure will not appear, thereby ensuring the overall structural strength of the ball pin 820 and extending the service life of the ball joint 8 as a whole. More specifically, in order to further enhance the structural strength of the ball pin 820, the main body of the ball pin 820 is a conical member, the small end of the conical member is provided with a ball head 821, and the large end is provided with the second main hinge plate 330, the second auxiliary hinge plate 430 or fixed to the vehicle body; the ball pin 820 is arranged perpendicular to the second main hinge plate 330 or the second auxiliary hinge plate 430.

[0063] Based on the same inventive concept, an embodiment of the present application also provides a vehicle, including the above-mentioned tailgate assembly.

[0064] Compared with the prior art, the rear door assembly provided in this embodiment achieves the effect of opening the rear door at full angles in a narrow space by adopting the above-mentioned rear door assembly, which facilitates the taking and placing of items, avoids the rear door from hitting obstacles at the rear, reduces the maintenance cost of the rear door, and can also avoid the problem of the auxiliary rear door 2 hitting the user's head when taking and placing items, thereby improving the user experience.

[0065] 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 assembly, characterized in that: It comprises a main back door (1), a secondary back door (2), a main connecting member (3) and a secondary connecting member (4); One side of the main back door (1) is rotatably connected to the vehicle body, the main connecting member (3) is connected to the circumferential side of the main back door (1), the secondary connecting member (4) is connected to the circumferential side of the secondary back door (2), the main connecting member (3) and the secondary connecting member (4) are hinged via a hinge shaft (5), and the hinge shaft (5) is located on the free swinging side of the main back door (1), and the hinge shaft (5) is parallel to the rotation axis between the main back door (1) and the vehicle body.

2. The tailgate assembly according to claim 1, characterized in that: The main connecting member (3) includes a main door panel (310) and a first main hinge plate (320) connected in sequence, the main door panel (310) is fitted and connected to the circumferential side of the main back door (1), and the first main hinge plate (320) is hinged to the secondary connecting member (4) through the hinge shaft (5); the first main hinge plate (320) and the main door panel (310) are arranged in a step-like manner, and in the axial direction of the hinge shaft (5), the first main hinge plate (320) protrudes from the main door panel (310) in a direction away from the main back door (1).

3. The tailgate assembly according to claim 2, characterized in that: The rear door assembly further comprises a main telescopic member (6), the main connecting member (3) further comprises a second main hinge plate (330) connected between the main door plate (310) and the first main hinge plate (320), and two ends of the main telescopic member (6) are respectively hinged to the second main hinge plate (330) and the vehicle body; The first main hinge plate (320) and the second main hinge plate (330), as well as the second main hinge plate (330) and the main door plate (310) are both distributed in a step-like manner.

4. The tailgate assembly according to claim 3, characterized in that: In the axial direction of the hinge shaft (5), the first main hinge plate (320) protrudes from the second main hinge plate (330) in a direction away from the main back door (1), and the second main hinge plate (330) protrudes from the main door plate (310) in a direction away from the main back door (1).

5. The tailgate assembly according to claim 3, characterized in that: A main reinforcing rib (340) is provided in the connection area between the main door panel (310) and the second main hinge panel (330).

6. The tailgate assembly according to claim 1 or 2, characterized in that: The secondary connecting member (4) comprises a secondary door plate (410) and a first secondary hinge plate (420) connected in sequence, the secondary door plate (410) is fitted and connected to the circumferential side of the secondary back door (2), and the first secondary hinge plate (420) is hinged to the main connecting member (3) via the hinge shaft (5); the first secondary hinge plate (420) and the secondary door plate (410) are arranged in a step-like manner, and in the axial direction of the hinge shaft (5), the first secondary hinge plate (420) protrudes from the secondary door plate (410) in a direction away from the secondary back door (2).

7. The tailgate assembly according to claim 6, characterized in that: The rear door assembly further comprises a secondary telescopic member (7), the secondary connecting member (4) further comprises a second secondary hinge plate (430) connected between the secondary door plate (410) and the first secondary hinge plate (420), and two ends of the secondary telescopic member (7) are respectively hinged to the second secondary hinge plate (430) and the vehicle body; The first auxiliary hinge plate (420) and the second auxiliary hinge plate (430), as well as the second auxiliary hinge plate (430) and the auxiliary door plate (410) are both distributed in a step-like manner.

8. The tailgate assembly according to claim 7, characterized in that: A secondary reinforcing rib (440) is provided in the connection area between the secondary door plate (410) and the second secondary hinge plate (430).

9. The tailgate assembly according to claim 7, characterized in that: The step vertical plate between the second secondary hinge plate (430) and the first secondary hinge plate (420) is defined as a second secondary vertical plate (450), and the second secondary vertical plate (450) extends in a direction inclined to a second preset path in its own width direction, and the second preset path is a distribution path of the second secondary hinge plate (430) and the first secondary hinge plate (420).

10. A vehicle, characterized in that: It comprises a tailgate assembly as described in any one of claims 1 to 9.

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