Vehicle tailgate assembly and vehicle

Abstract

The present disclosure provides a vehicle tailgate assembly and a vehicle. The vehicle tailgate assembly comprises a tailgate and an electric tailgate strut for supporting the tailgate. The tailgate comprises a non-spoiler tailgate and an active-spoiler tailgate arranged in order of increasing weight. When the tailgate is the non-spoiler tailgate, a support point at which one end of the electric tailgate strut supports the tailgate is the same as that when the tailgate is the active-spoiler tailgate. When the tailgate is the non-spoiler tailgate, a gravitational moment of the tailgate is adjusted to match a strut torque of a reference electric strut. When the tailgate is the active-spoiler tailgate, the reference electric strut is arranged on the tailgate such that a supporting force of the reference electric strut meets use requirements under a first preset operating condition of the active-spoiler tailgate.

Description

A vehicle tailgate assembly and vehicle Cross-references to related applications

[0001] This application claims priority to Chinese patent application No. 202510055351.0, filed on January 14, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to, but is not limited to, the field of vehicle technology, and more specifically, to a vehicle tailgate assembly and a vehicle. Background Technology

[0003] With the rapid development of the automotive industry, more and more vehicles are adopting the use of rear wings on the tailgate to reduce lift at the rear of the vehicle, increase downforce at the rear of the vehicle and the overall grip of the vehicle, thereby improving the aerodynamic performance of the rear of the vehicle as well as the sportiness and premium feel of the vehicle. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0005] At least one embodiment of this disclosure provides a vehicle tailgate assembly and a vehicle.

[0006] This disclosure provides a vehicle tailgate assembly, including a tailgate electric support rod and a tailgate. The tailgate electric support rod is configured to support the tailgate, which includes a tailgate without a rear spoiler and a tailgate with an active rear spoiler. When the tailgate is a tailgate without a rear spoiler, one end of the tailgate electric support rod is supported at the same support point as when the tailgate is a tailgate with an active rear spoiler. The weight of the tailgate without a rear spoiler is less than that of the tailgate with an active rear spoiler. The tailgate with an active rear spoiler is used as a reference tailgate, and the tailgate electric support rod adapted to the active rear spoiler is used as a reference electric support rod. When the tailgate is a tailgate without a rear spoiler, the gravitational torque of the tailgate is adjusted according to the weight of the tailgate so that the gravitational torque of the tailgate reaches the support torque of the reference electric support rod. When the tailgate is a tailgate with an active rear spoiler, the reference electric support rod is configured on the tailgate so that the support force of the reference electric support rod meets the usage requirements of the first preset working condition of the active rear spoiler tailgate.

[0007] Optionally, when the tailgate is a tailgate without a rear spoiler, the vehicle tailgate assembly also includes a counterweight. The weight of the counterweight meets a first preset condition, and the counterweight is installed on the tailgate at the center of gravity of the counterweight. The counterweight is used to adjust the gravitational torque of the tailgate.

[0008] Optionally, the first preset condition includes: 0≤M0-(M2+n)≤1kg; M0 is the weight of the base tailgate, M2 is the weight of the tailgate without a tail wing, and n is the weight of the counterweight.

[0009] Optionally, the formula for calculating the center of gravity of the counterweight includes: X1=(M0*X3-M2*X2) / M0; Y1=(M0*Y3-M2*Y2) / M0; Z1=(M0*Z3-M2*Z2) / M0; (X1, Y1, Z1) are the coordinates of the center of gravity of the counterweight, (X2, Y2, Z2) are the coordinates of the center of gravity of the tailless tailgate, (X3, Y3, Z3) are the coordinates of the center of gravity of the reference tailgate, M0 is the weight of the reference tailgate, and M2 is the weight of the tailless tailgate.

[0010] Optionally, the first set working conditions include normal temperature working conditions, high temperature working conditions, low temperature working conditions, slope working conditions, and snow load working conditions.

[0011] Optionally, the counterweight is a resonant block, which includes a counterweight part and a vibration damping pad. The counterweight part is connected to the mounting position on the back door through the vibration damping pad.

[0012] Optionally, when the tailgate is a tailgate without a rear spoiler, the other end of the tailgate electric strut is supported at the same mounting point on the vehicle body as when the tailgate is a tailgate with an active rear spoiler.

[0013] Alternatively, the counterweight may be mounted on the sheet metal or interior trim panel of the tailgate.

[0014] Optionally, the tailgate also includes a large tail wing tailgate, the weight of which is greater than the weight of the active tail wing tailgate; when the tailgate is a large tail wing tailgate and the weight of the tailgate meets the second preset condition, the support force of the reference electric strut is adjusted so that the support force of the reference electric strut meets the usage requirements of the second preset working condition of the large tail wing tailgate, the second preset working condition being a part of the first preset working condition.

[0015] Optionally, the second preset condition includes: 1kg≤M0+m-M1≤2kg; where M0 is the weight of the reference tailgate, M1 is the weight of the large tail wing tailgate, and m is the maximum snow load weight of the reference tailgate.

[0016] Optionally, when the tailgate is a large tail wing tailgate and the weight of the tailgate meets the second preset condition, the support force of the reference electric strut is adjusted by adjusting the spring force and / or friction force of the reference electric strut, so that the support force of the reference electric strut meets the usage requirements of the second preset working condition of the large tail wing tailgate.

[0017] Optionally, the second set operating condition includes normal temperature operating condition, high temperature operating condition and low temperature operating condition.

[0018] Optionally, in the case of a tailgate without a tail wing, an active tail wing tailgate, or a large tail wing tailgate, one end of the tailgate electric strut is supported at the same support point of the tailgate.

[0019] This disclosure also provides a vehicle including the vehicle tailgate assembly described above.

[0020] The vehicle tailgate assembly and vehicle of this disclosure embodiment employ the same set of electric support rods at the same support point for two different types and weights of tailgates: tailgates without a rear spoiler and tailgates with an active rear spoiler. This allows both types of tailgates to be opened and closed using the same set of electric support rods. Specifically, when the tailgate is a tailgate without a rear spoiler, the tailgate's gravitational torque is adjusted according to its weight so that the tailgate's gravitational torque reaches the support torque of the reference electric support rod, thereby reaching the gravitational torque of the reference tailgate (active rear spoiler tailgate). When the tailgate is an active rear spoiler tailgate, the reference electric support rod is configured on the tailgate, that is, the electric support rod adapted to the active rear spoiler tailgate is directly assembled onto the active rear spoiler tailgate so that the support force of the reference electric support rod meets the usage requirements of the first preset working condition of the active rear spoiler tailgate. This allows both the tailgate without a spoiler and the tailgate with an active spoiler to use the same set of electric struts for opening and closing. This not only saves on the development and design costs, material management costs, testing costs, and error-proofing costs of the electric struts, but also ensures consistent mounting points on the tailgate, guaranteeing the interchangeability of the tailgate sheet metal welding assembly. This further reduces the development and design costs, material management costs, mold costs, tooling and fixture costs, welding costs, and error-proofing costs of the tailgate sheet metal welding assembly, thus lowering the overall production cost of the tailgate system. Furthermore, adjusting the gravitational moment of the tailgate without a spoiler to be close to that of the reference tailgate prevents the tailgate from suddenly springing open to its maximum opening angle after unlocking when the reference electric strut is applied. This avoids the impact force of the tailgate opening, ensuring user safety, and also prevents significant collisions between the tailgate and surrounding vehicle structures, extending the tailgate's lifespan.

[0021] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the structure of the vehicle tailgate assembly in an embodiment of this disclosure.

[0023] Figure 2 is a schematic diagram of the torque balance of the tailgate system in an embodiment of this disclosure.

[0024] Figure 3 is a schematic diagram of the assembly structure of the reference electric strut and the tailless tail door in an embodiment of this disclosure.

[0025] Figure 4 is a schematic diagram of the assembly structure of the reference electric strut and the active tail wing tail door in an embodiment of this disclosure.

[0026] Figure 5 is a schematic diagram of the assembly structure of the reference electric strut and the large tail wing tail door in an embodiment of this disclosure.

[0027] Explanation of reference numerals in the attached diagram: 1. Tailless tail wing tail door; 2. Active tail wing tail door; 3. Large tail wing tail door; 4. Base electric strut. Detailed Implementation

[0028] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Although some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0029] In the accompanying drawings, the Z-axis represents the vertical direction, i.e., the up-down position, with the positive direction of the Z-axis representing upward and the negative direction representing downward. The X-axis represents the horizontal direction and is designated as the front-back position, with the positive direction of the X-axis representing the rear and the negative direction representing the front. It should be noted that the aforementioned representations of the Z-axis and X-axis are merely for the convenience of describing the embodiments of this disclosure and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0030] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., used in this disclosure are only used to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0031] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0032] In vehicles with tailgates, the tailgate system for the same model includes two types: a basic tailgate without a rear spoiler and a tailgate with an active rear spoiler. Because the weight and center of gravity differ between these different types of tailgates, dedicated electric strut structures need to be designed for each type to achieve fully balanced opening and closing. This significantly increases the development and manufacturing costs of both the electric strut structure and the tailgate sheet metal.

[0033] In view of the above, at least one embodiment of the present disclosure provides a vehicle tailgate assembly and a vehicle.

[0034] Referring to Figures 1 to 4, an embodiment of this disclosure provides a vehicle tailgate assembly, including a tailgate electric support rod and a tailgate. The tailgate electric support rod supports the tailgate. The tailgate types include a tailgate without a rear spoiler 1 and a tailgate with an active rear spoiler 2. For both types of tailgates, one end of the tailgate electric support rod is supported at the same support point on the tailgate. The tailgate without a rear spoiler 1 has a lighter weight than the tailgate with an active rear spoiler 2. Taking the tailgate with an active rear spoiler 2 as the reference tailgate, the electric support rod adapted to the tailgate with an active rear spoiler 2 is designated as the reference electric support rod 4.

[0035] Specifically, the tailgate and the electric strut together constitute the vehicle's tailgate system. In this system, the electric strut supports the tailgate to prevent it from falling off based on the principle of torque balance. That is, the tailgate's gravitational torque equals the supporting torque of the electric strut, making the sum of the tailgate's torques zero. This prevents the tailgate from rotating and ensures it doesn't fall off after opening. For example, as shown in Figure 2, P1 represents the tailgate's hinge point, P2 represents the tailgate's center of gravity, P3 represents the opening operation point, P4 represents the closing operation point, P5 represents the mounting point of the electric strut on the tailgate, P6 represents the mounting point of the electric strut on the vehicle body (optional), α represents the tailgate's opening angle, and F... 开 F represents the maximum force required to open the tailgate. 关 This represents the maximum force exerted when the tailgate is closed. Assume the weight of the tailgate is G. 重 The lever arm of gravity is d. 重 The gravitational torque is M. 重 The supporting force of the electric strut is F. 杆 The lever arm of the supporting force of the electric strut is d. 杆 The torque of the supporting force is M 杆 According to the principle of torque balance, then M 重 -M 杆 =0, that is, M 重 =M 杆Depending on whether a rear spoiler is present or not, the tailgate can be divided into a tailgate without a rear spoiler (1) and a tailgate with an active rear spoiler (2), as shown in Figures 3 and 4. Furthermore, within the same model series, the weight of tailgate without a rear spoiler (1) and tailgate with an active rear spoiler (2) increases sequentially, and their center of gravity positions are also different. This means that the gravitational moments of these two tailgate configurations are different. Since the supporting moment of a single set of electric struts is unique, if a single set of electric struts is needed to support both tailgate configurations at the same support point, the gravitational moments of the two configurations must be as close as possible to ensure compatibility between tailgates with and without a rear spoiler using the same set of electric struts, achieving fully balanced opening and closing of the tailgate. Based on this, tailgate with an active rear spoiler (2) is typically used as the base tailgate, and an electric strut adapted to tailgate with an active rear spoiler (2) is used as the base electric strut (4). The gravitational moment of the lighter tailgate without a rear spoiler (1) is made as close as possible to that of tailgate with an active rear spoiler (2).

[0036] When the tailgate is a tailless tailgate 1, the gravitational torque of the tailgate is adjusted according to its weight to make it reach the strut torque of the reference electric strut 4. Since the weight of the tailless tailgate 1 is usually less than that of the active tailgate 2, methods such as adding counterweights are typically used to increase the gravitational torque of the tailless tailgate 1, so that its gravitational torque is close to the strut torque of the reference electric strut 4. Since the strut torque of the reference electric strut 4 is equal to the gravitational torque of the reference tailgate, making the gravitational torque of the tailless tailgate 1 close to the strut torque of the reference electric strut 4 is equivalent to making the gravitational torque of the tailless tailgate 1 close to the gravitational torque of the reference tailgate, thus making the reference electric strut 4 suitable for the tailless tailgate 1.

[0037] When the tailgate is an active tail wing tailgate 2, a reference electric strut 4 is configured on the tailgate so that the supporting force of the reference electric strut 4 meets the usage requirements of the first preset operating condition of the active tail wing tailgate 2. In one embodiment, the first preset operating condition of the active tail wing tailgate 2 can be all operating conditions of the active tail wing tailgate 2. Since the active tail wing tailgate 2 is a reference tailgate, and the reference electric strut 4 can meet the usage requirements of the active tail wing tailgate 2 in all operating conditions, the active tail wing tailgate 2 can be directly adapted to the reference electric strut 4 to achieve fully balanced opening and closing of the tailgate.

[0038] In this embodiment, for the two different types and weights of tailgates, namely the tailless tailgate 1 and the active tailgate 2, the same set of tailgate electric struts is used to support them at the same support point, so that the two different tailgates can be opened and closed using the same set of electric struts. Specifically, when the tailgate is the tailless tailgate 1, the gravitational torque of the tailgate is adjusted according to the weight of the tailgate so that the gravitational torque of the tailgate reaches the strut torque of the reference electric strut 4, and thus reaches the gravitational torque of the reference tailgate; when the tailgate is the active tailgate 2, the reference electric strut 4 is configured on the tailgate, that is, the electric strut adapted to the active tailgate 2 is directly assembled onto the active tailgate 2 so that the supporting force of the reference electric strut 4 meets the usage requirements of the first set working condition of the active tailgate 2. This allows both the tailgate without a spoiler (1) and the active spoiler tailgate (2) to use the same set of electric struts for opening and closing. This not only saves on the development and design costs, material management costs, testing costs, and error-proofing costs of the electric struts, but also ensures that the installation points of the electric struts on the tailgate are consistent. This guarantees the interchangeability of the tailgate sheet metal welding assembly, further reducing the development and design costs, material management costs, mold costs, tooling and fixture costs, welding costs, and error-proofing costs of the tailgate sheet metal welding assembly, thus lowering the overall production cost of the tailgate system. Furthermore, adjusting the gravitational moment of the tailgate without a spoiler (1) to be close to that of the reference tailgate prevents the tailgate without a spoiler (1) from suddenly springing open to its maximum opening angle after unlocking when the reference electric strut (4) is applied to it. This avoids the impact force of the tailgate opening, preventing injury to the user and ensuring the safety of the tailgate system. It also prevents the tailgate from colliding significantly with the surrounding vehicle structure, extending the tailgate's lifespan.

[0039] Optionally, in both the tailgate type 1 (without a rear spoiler) and the tailgate type 2 (with an active rear spoiler), the other end of the tailgate electric strut is supported at the same mounting point on the vehicle body. The other end of the tailgate electric strut refers to the end of the tailgate electric strut away from the tailgate.

[0040] This ensures that the body sheet metal welding assemblies of the same series of models are interchangeable, thereby saving on the development and design costs and mold costs of the body sheet metal welding assemblies.

[0041] Optionally, when the tailgate type is a tailgate without a rear spoiler 1, the vehicle tailgate assembly also includes a counterweight. The weight of the counterweight satisfies a first preset condition, and the counterweight is installed on the tailgate at its center of gravity to adjust the tailgate's gravitational torque. "The center of gravity of the counterweight" refers to the specific location on the tailgate where the resultant force of the counterweight's own weight acts, typically represented by coordinates (X, Y, Z) in a three-dimensional coordinate system.

[0042] In this embodiment, the weight of the counterweight can be equal to or slightly less than the weight difference between the base tailgate and the tailgate without a spoiler 1. The center of gravity of the counterweight is determined based on the center of gravity positions of the tailgate without a spoiler and the base tailgate. In one embodiment, the coordinates of the center of gravity of the tailgate without a spoiler and the base tailgate are determined during the manufacturing process. That is, the center of gravity positions of the tailgate without a spoiler and the base tailgate are known. Furthermore, the counterweight is typically arranged inside the tailgate trim panel. It can be installed on the tailgate sheet metal or interior trim panel, or integrated into the trim panel structure. In practical applications, this needs to be determined based on the installation space, the weight of the counterweight, and its center of gravity. Thus, when the tailgate type is tailless tailgate 1, the weight of tailless tailgate 1 can be increased by adding a counterweight to tailless tailgate 1, thereby increasing the gravitational torque of tailless tailgate 1, so that the gravitational torque of tailless tailgate 1 reaches the strut torque of the reference electric strut 4, and thus approaches the gravitational torque of the reference tailgate, so that tailless tailgate 1 can achieve fully balanced opening and closing using the reference electric strut 4.

[0043] In another embodiment, the counterweight can be installed at the center of gravity of the tailless tailgate 1, and the weight of the counterweight is determined according to the strut torque of the reference electric strut 4, so that the gravitational torque of the tailless tailgate 1 reaches the strut torque of the reference electric strut 4. Specifically, if the strut torque of the reference electric strut 4 is M... base The gravitational moment of tailless tailgate 1 is M. 重1 The lever arm of the gravity of the back door is d. 重1 If the weight of the counterweight is N, then: M 重1 +N*d 重1 =M base N = (M base -M 重1 ) / d 重1

[0044] Optionally, the first preset condition includes: 0≤M0-(M2+n)≤1kg; where M0 is the weight of the base tailgate, M2 is the weight of the tailless tailgate 1, and n is the weight of the counterweight.

[0045] Specifically, in one example, if the weight M0 of the base tailgate is 50kg and the weight M2 of the tailless tailgate 1 is 45kg, then a counterweight weighing between 4kg and 5kg can be selected; in another example, if the weight M0 of the base tailgate is 50kg and the weight M2 of the tailless tailgate 1 is 40kg, then a counterweight weighing between 9kg and 10kg can be selected.

[0046] In this way, by setting the first preset condition to 0≤M0-(M2+n)≤1kg, the weight requirement of the counterweight can be reduced while ensuring that the weight of the tailless tailgate 1 equipped with the counterweight is close to the weight of the active tailgate 2.

[0047] Optionally, the formula for calculating the center of gravity of the counterweight includes: X1=(M0*X3-M2*X2) / M0; Y1=(M0*Y3-M2*Y2) / M0; Z1=(M0*Z3-M2*Z2) / M0; where (X1, Y1, Z1) are the coordinates of the center of gravity of the counterweight, (X2, Y2, Z2) are the coordinates of the center of gravity of the tailless tailgate 1, (X3, Y3, Z3) are the coordinates of the center of gravity of the reference tailgate, M0 is the weight of the reference tailgate, and M2 is the weight of the tailless tailgate 1.

[0048] In this embodiment, based on the principle of torque balance, with the coordinates of the center of gravity of the reference tailgate and the tailless tailgate 1 known, the center of gravity of the reference tailgate, the center of gravity of the tailless tailgate 1, and the center of gravity of the counterweight satisfy the following relationships: X1*M0+X2*M2=X3*M0; Y1*M0+Y2*M2=Y3*M0; Z1*M0+Z2*M2=Z3*M0; Based on the above relationships, the calculation formula for the center of gravity of the counterweight can be derived, thus realizing the calculation of the center of gravity of the counterweight.

[0049] Optionally, the counterweight is a resonant block. The resonant block includes a counterweight part and a vibration damping pad, and the counterweight part is connected to the mounting position on the tailgate through the vibration damping pad. In this way, designing the counterweight as a resonant block allows the counterweight to be positioned so that the gravitational moment of the tailgate 1 without a tail fin is close to that of the reference tailgate, and also effectively improves the modal characteristics of the tailgate system.

[0050] Optionally, the first set operating conditions include normal temperature operating conditions, high temperature operating conditions, low temperature operating conditions, slope operating conditions, and snow load operating conditions.

[0051] In this embodiment, since vehicles equipped with active tailgate 2 are usually family cars, in order to ensure that the adjusted reference electric strut 4 can be fully applied to the active tailgate 2, it is necessary to ensure that the supporting force of the adjusted reference electric strut 4 can meet all working conditions of the active tailgate 2, namely normal temperature working condition, high temperature working condition, low temperature working condition, slope working condition and snow load working condition.

[0052] Optionally, the tailgate type also includes a large tail wing tailgate 3, the weight of which is greater than the weight of the active tail wing tailgate 2; when the tailgate is a large tail wing tailgate 3 and the weight of the tailgate meets the second preset condition, the support force of the reference electric strut 4 is adjusted so that the support force of the reference electric strut 4 meets the usage requirements of the second preset working condition of the large tail wing tailgate 3, wherein the second preset working condition is a part of the first preset working condition.

[0053] In this embodiment, when the tailgate is a large rear wing tailgate 3 and its weight meets the second preset condition, the supporting force of the reference electric support rod 4 is adjusted so that its supporting force meets the usage requirements of the second preset working condition of the large rear wing tailgate 3. The second preset working condition is a partial working condition of the first preset working condition; for example, the second preset working condition can be the basic working condition of the large rear wing tailgate 3, such as normal temperature working condition, high temperature working condition, and low temperature working condition. Furthermore, for the large rear wing tailgate 3, which is heavier than the reference tailgate, reducing its weight to make its gravitational moment closer to that of the reference tailgate would require significant modifications to the large rear wing tailgate 3, which is not only difficult to implement but also incurrs high design costs. Based on this, this embodiment increases the supporting force of the reference electric strut 4 by increasing, for example, the spring force and / or friction force, to ensure that the reference electric strut 4 with increased supporting force can meet the usage requirements of the second preset working condition of the large tail wing tail door 3. For example, it enables the large tail wing tail door 3 to open and close in a fully balanced manner under the basic working condition. In this way, the tail doors of the three configurations—tailless tail door 1, active tail wing tail door 2, and large tail wing tail door 3—can be opened and closed using the same set of electric struts.

[0054] Optionally, when the tailgate is one of three types—tailgate without a rear wing 1, tailgate with an active rear wing 2, and tailgate with a large rear wing 3—one end of the tailgate electric support rod is supported at the same support point on the tailgate. In this way, using the same set of tailgate electric support rods at the same support point for the three different types and weights ensures that the installation point of the electric support rods on the tailgate is consistent, thus guaranteeing the interchangeability of the three tailgate sheet metal welding assemblies.

[0055] Optionally, the second preset condition includes: 1kg≤M0+m-M1≤2kg; where M0 is the weight of the reference tailgate, M1 is the weight of the large tailgate 3, and m is the maximum snow load of the reference tailgate. The maximum snow load of the reference tailgate refers to the maximum safe weight of snow that its outer surface can withstand, provided that its electric support rod is not damaged and it can maintain normal opening and closing function.

[0056] Specifically, in one example, if the weight M0 of the reference tailgate and the maximum snow load m are 50 kg and 3 kg respectively, the weight M1 of the large tailgate 3 can be controlled between 51 kg and 52 kg during the design phase. In another example, if the weight M0 of the reference tailgate and the maximum snow load m are 60 kg and 5 kg respectively, the weight M1 of the large tailgate 3 can be controlled between 63 kg and 64 kg during the design phase.

[0057] In this way, by setting the second preset condition to 1kg≤M0+m-M1≤2kg, the weight of the large tail wing tail door 3 can be controlled within a reasonable range that is close to the weight of the active tail wing tail door 2, thereby reducing the requirements for the support force of the reference electric strut 4 and the difficulty of adjustment.

[0058] Optionally, as shown in Figure 5, when the tailgate is a large tail wing tailgate 3 and the weight of the tailgate meets the second preset condition, the support force of the reference electric support rod 4 is adjusted by adjusting the spring force and / or friction force of the reference electric support rod 4 so that the support force of the reference electric support rod 4 meets the usage requirements of the second preset working condition of the large tail wing tailgate 3.

[0059] The spring force of the reference electric support rod 4 can be increased to reach the set spring force by increasing the wire diameter or the number of spring coils of the mechanical helical spring. Alternatively, the friction force of the reference electric support rod 4 can be increased by replacing the damper corresponding to the friction plate in the reference electric support rod 4 with a damper with a larger damping force.

[0060] In this embodiment, when the reference electric strut 4 needs to be applied to the large tail wing tailgate 3, the supporting force of the reference electric strut 4 can be increased by increasing the spring force and / or friction force of the reference electric strut 4, thereby adjusting the supporting force of the reference electric strut 4 so that the adjusted reference electric strut 4 meets the usage requirements of the second set working condition of the large tail wing tailgate 3. In this way, the reference electric strut 4 can be applied to both the tailless tailgate 1 and the active tail wing tailgate 2, as well as the large tail wing tailgate 3, thus ensuring that a single set of electric strut structure is compatible with the tailgate configurations of the tailless tailgate 1, the active tail wing tailgate 2, and the large tail wing tailgate 3.

[0061] Optionally, the second set operating condition includes normal temperature operating condition, high temperature operating condition and low temperature operating condition.

[0062] In this embodiment, since vehicles equipped with large rear wing tailgate 3 are usually used as race cars, their usage scenarios basically do not involve slope and snow load conditions. Therefore, when adjusting the support force of the reference electric strut 4, it is only necessary to ensure that the adjusted support force meets the basic operating conditions of the large rear wing tailgate 3 under normal temperature, high temperature and low temperature conditions. This can reduce the requirements and adjustment difficulty of the support force of the reference electric strut 4.

[0063] Optionally, the second set operating conditions include normal temperature operating conditions, high temperature operating conditions, low temperature operating conditions, slope operating conditions, and snow load operating conditions. When the tailgate is the large rear spoiler tailgate 3, the maximum slope of the tailgate is less than the preset maximum slope value of the large rear spoiler tailgate 3, and / or, the maximum snow load of the tailgate is less than the preset maximum snow load of the large rear spoiler tailgate 3. "Maximum slope of the tailgate" refers to the maximum road slope angle at which the lowest point of the tailgate will not interfere with or collide with the rear slope during the entire opening and closing process when the vehicle is parked. It can be expressed as a slope percentage (slope percentage = vertical height / horizontal distance × 100%). For example, a maximum slope value of 100% is equivalent to a 45-degree slope.

[0064] In this embodiment, when the adjusted reference electric strut 4 cannot meet the set slope and snow load conditions of the tailgate 3, the maximum slope and maximum snow load can be compromised. That is, the maximum slope of the tailgate is designed to be less than the preset maximum slope value of the tailgate 3, and the maximum snow load is designed to be less than the preset maximum snow load of the tailgate 3. For example, if the preset maximum slope of the tailgate 3 is 20% and the preset maximum snow load is 3kg, when compromising the maximum slope and maximum snow load, the maximum slope of the tailgate can be reduced from 20% to 10%, and the maximum snow load can be reduced by 1kg to 1.5kg. For instance, the maximum snow load can be reduced from 3kg to 2kg or 1.5kg. In this way, the adjusted reference electric strut 4 can meet the basic operating requirements of the tailgate 3, as well as the requirements for slope conditions with smaller slopes and / or snow load conditions with smaller snow loads.

[0065] This disclosure also provides a vehicle including the vehicle tailgate assembly described above.

[0066] The vehicle provided in this embodiment has the same beneficial effects as the vehicle tailgate assembly described above, and will not be repeated here.

[0067] While the above disclosure is provided, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this disclosure.

Claims

1. A vehicle tailgate assembly, comprising a tailgate electric support rod and a tailgate, wherein the tailgate electric support rod is configured to support the tailgate, wherein, The tailgate includes a tailless tailgate (1) and an active tailgate (2). When the tailgate is the tailless tailgate (1), one end of the tailgate electric support rod is supported at the same support point as when the tailgate is the active tailgate (2). The weight of the tailless tailgate (1) is less than the weight of the active tailgate (2); The active tail wing tail door (2) is used as the reference tail door, and the tail door electric support rod adapted to the active tail wing tail door (2) is used as the reference electric support rod (4); When the tailgate is the tailless tailgate (1), the gravitational torque of the tailgate is adjusted according to the weight of the tailgate so that the gravitational torque of the tailgate reaches the strut torque of the reference electric strut (4). When the tailgate is the active tail wing tailgate (2), the reference electric strut (4) is configured on the tailgate so that the supporting force of the reference electric strut (4) meets the usage requirements of the first set working condition of the active tail wing tailgate (2).

2. The vehicle back door assembly of claim 1, wherein, When the tailgate is the tailgate without a tail wing (1), the vehicle tailgate assembly also includes a counterweight block. The weight of the counterweight block meets a first preset condition, and the installation position of the counterweight block on the tailgate is located at the center of gravity of the counterweight block. The gravity torque of the tailgate is adjusted by the counterweight block.

3. The vehicle back door assembly of claim 2, wherein, The first preset condition includes: 0 ≤ M0 - (M2 + n) ≤ 1 kg; Wherein, M0 is the weight of the reference tailgate, M2 is the weight of the tailless tailgate (1), and n is the weight of the counterweight.

4. The vehicle back door assembly of claim 2, wherein, The formulas for calculating the center of gravity of the counterweight include: X1 = (M0*X3 - M2*X2) / M0; Y1 = (M0*Y3 - M2*Y2) / M0; Z1 = (M0*Z3 - M2*Z2) / M0; Wherein, (X1, Y1, Z1) are the center of gravity coordinates of the counterweight block, (X2, Y2, Z2) are the center of gravity coordinates of the tailless tailgate (1), (X3, Y3, Z3) are the center of gravity coordinates of the reference tailgate, M0 is the weight of the reference tailgate, and M2 is the weight of the tailless tailgate (1).

5. The vehicle back door assembly of any one of claims 1-4, wherein, The first set working conditions include normal temperature working conditions, high temperature working conditions, low temperature working conditions, slope working conditions, and snow load working conditions.

6. The vehicle back door assembly of any one of claims 2-4, wherein, The counterweight is a resonant block, which includes a counterweight part and a vibration damping pad. The counterweight part is connected to the mounting position on the back door through the vibration damping pad.

7. The vehicle back door assembly of any one of claims 1-6, wherein, When the tailgate is the tailgate without a rear wing (1), the other end of the tailgate electric support rod is supported at the same mounting point on the vehicle body as when the tailgate is the tailgate with an active rear wing (2).

8. The vehicle back door assembly of any one of claims 2-4, wherein, The counterweight is installed on the sheet metal parts or interior panel of the tailgate.

9. The vehicle back door assembly of claim 1, wherein, The tailgate also includes a large tail wing tailgate (3), the weight of which is greater than the weight of the active tail wing tailgate (2); In a case where the back door is the large tail wing back door (3) and the weight of the back door satisfies a second preset condition, the support force of the reference electric support rod (4) is adjusted so as to make the support force of the reference electric support rod (4) satisfy the use requirement of a second set working condition of the large tail wing back door (3), wherein the second set working condition is a partial working condition of the first set working condition.

10. The vehicle back door assembly of claim 9, wherein, The second preset condition comprises: 1kg≤M0+m-M1≤2kg; Wherein, M0 is the weight of the reference back door, M1 is the weight of the large tail wing back door (3), and m is the maximum snow load weight of the reference back door.

11. The vehicle back door assembly of claim 9, wherein, In a case where the back door is the large tail wing back door (3) and the weight of the back door satisfies a second preset condition, the support force of the reference electric support rod (4) is adjusted so as to make the support force of the reference electric support rod (4) satisfy the use requirement of a second set working condition of the large tail wing back door (3), wherein the second set working condition is a partial working condition of the first set working condition.

12. The vehicle back door assembly of any one of claims 9-11, wherein, The second set working condition comprises a normal temperature working condition, a high temperature working condition and a low temperature working condition.

13. The vehicle back door assembly of claim 9, wherein, In a case where the back door is the large tail wing back door (3) and the weight of the back door satisfies a second preset condition, the support force of the reference electric support rod (4) is adjusted so as to make the support force of the reference electric support rod (4) satisfy the use requirement of a second set working condition of the large tail wing back door (3), wherein the second set working condition is a partial working condition of the first set working condition.

14. A vehicle comprising the vehicle back door assembly according to any one of claims 1 to 13.

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