Trunk structure design method, trunk structure and vehicle

Abstract

The present invention relates to the technical field of automobile parts, and in particular to a trunk structure design method, a trunk structure and a vehicle. The trunk structure design method comprises: obtaining the support force of the support rod in the normal closed position of the trunk lid, and the sealing reaction force of the sealing accessory; establishing a theoretical design model including the trunk lid, the white body stopper, the support rod and the sealing accessory, and loading the gravity of the trunk lid, the support force of the support rod, and the sealing reaction force of the sealing accessory, and making the trunk lid in the normal closed position, obtaining the gap and face difference between the trunk lid and the white body stopper; adjusting the design model of the trunk lid and / or the white body stopper according to the gap and face difference between the trunk lid and the white body stopper, until the gap and face difference between the trunk lid and the white body stopper when normally closed are within a set range. In the prior art, the problem of manual adjustment of the gap and face difference when installing the trunk lid is low efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a trunk structure design method, a trunk structure and a vehicle. Background Art

[0002] When the car's tailgate is closed, it will be affected by the tailgate's gravity, the reaction force of the sealing accessories and the extension force of the strut. The combined force will cause the tailgate to move downward and backward, which will also cause the gap surface difference between the tailgate and environmental parts (top cover, side panel, taillights, rear bumper) to exceed the tolerance.

[0003] In reality, workers control the gap and flushness of the tailgate by adjusting the tailgate hinges, tailgate locks, etc. In the prior art, an auxiliary tool is used to adjust the tailgate, which essentially still requires online adjustment.

[0004] This method can effectively control the gap and face difference to a certain extent, but it is time-consuming and labor-intensive for workers and will affect the production rhythm. Summary of the invention

[0005] In view of the defects existing in the prior art, the purpose of the present invention is to provide a method for designing a trunk structure. In the prior art, when installing the trunk cover, the clearance surface difference is manually adjusted out of tolerance, which is inefficient.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] In one aspect, the present invention provides a method for designing a trunk structure, comprising the following steps:

[0008] Obtain the support force of the support rod in the normal closed position of the trunk lid and the sealing reaction force of the sealing accessory;

[0009] A theoretical design model including the trunk lid, the white body stopper, the support rod and the sealing accessories is established, and the gravity of the trunk lid, the support force of the support rod, and the sealing reaction force of the sealing accessories are loaded. The trunk lid is placed in a normal closed position to obtain the gap and surface difference between the trunk lid and the white body stopper;

[0010] According to the gap and face difference between the trunk lid and the white body stop, the design model of the trunk lid and / or the white body stop is adjusted until the gap and face difference between the trunk lid and the white body stop when normally closed are within the set range.

[0011] In some optional solutions, obtaining the supporting force of the support rod in the normal closing position of the trunk lid includes:

[0012] According to the formula F = nRT*a / (V-Li*(Aa))-P*a, determine the support force F of the support rod in the normal closed position of the trunk lid;

[0013] Among them, A is the piston area, a is the cross-sectional area of ​​the piston rod; P is the atmospheric pressure; V is the volume inside the cylinder when the strut is free, Li is the compression of the strut, n is the gas molar number; R is the ideal gas constant, and T is the temperature.

[0014] In some optional schemes, the design model of the trunk lid and / or the body-in-white stop is adjusted until the gap and surface difference between the trunk lid and the body-in-white stop when closed are within a set range, which is achieved by adjusting the height of the body-in-white stop.

[0015] In some optional schemes, after the gap and surface difference between the trunk lid and the white body stop when closed are within a set range, it also includes: determining the set length of the plug tube set in the bubble tube in the anti-interference sealing strip according to the interference area between the trunk lid and the white body stop in the pass state.

[0016] In some optional solutions, the step of determining to set a plug tube of a set length in the bubble tube of the anti-interference sealing strip according to the interference area between the trunk lid and the stopper of the body-in-white in the clearance state includes:

[0017] According to the clearance angle of the trunk lid, determine the interference range between the trunk lid and the stopper of the body in white;

[0018] According to the interference range between the trunk lid and the white body stopper, determine the set length of the plug tube set in the bubble tube in the anti-interference sealing strip;

[0019] It is determined whether the reaction force of the sealing strip of the plug tube provided in the bubble tube meets the set luggage lock point sealing reaction force requirement. If not, the compression load of the bubble tube and / or the plug tube is adjusted until the requirement is met.

[0020] In some optional solutions, the step of determining the interference range between the trunk lid and the stopper of the body-in-white according to the clearance angle of the trunk lid includes:

[0021] Get the clearance angle of the trunk lid;

[0022] Establishing a model including a trunk lid and a stopper of a body-in-white, and placing the trunk lid at a clearance angle;

[0023] A cross section is drawn at a set interval at the contact position between the trunk lid and the body-in-white stop, and when the gap between the trunk lid and the body-in-white stop does not meet the set gap, or the surface difference between the trunk lid and the body-in-white stop does not meet the set surface difference, interference between the trunk lid and the body-in-white stop is determined.

[0024] In some optional solutions, obtaining the clearance angle of the trunk lid includes:

[0025] Adjusting the lock of the trunk lid to the limit position;

[0026] The trunk lid is closed, and a clearance angle of the trunk lid is determined.

[0027] In some optional solutions, the step of determining whether the reaction force of the sealing strip of the plug tube in the bubble tube meets the requirements for the sealing reaction force of the luggage lock point, includes:

[0028] According to the compression load and length of the bubble tube, the total reaction moment of the bubble tube is determined, and according to the compression load and length of the plug tube, the total reaction moment of the plug tube is determined;

[0029] Determine the sealing reaction force of the trunk lock point based on the total reaction torque of the bubble tube, the total reaction torque of the plug tube, and the support force of the trunk lid in the normal closed position;

[0030] According to the sealing reaction force of the luggage lock point, it is determined whether the reaction force of the sealing strip provided with a plug tube in the bubble tube meets the set luggage lock point sealing reaction force requirement.

[0031] In a second aspect, the present invention further provides a trunk structure, which is designed using any of the above-mentioned trunk structure design methods.

[0032] In a third aspect, the present invention further provides a vehicle, comprising the above-mentioned trunk structure.

[0033] Compared with the prior art, the advantages of the present invention are: in the theoretical design model including the trunk lid and the white body stop, the gap and face difference between the trunk lid and the white body stop are within the set range. Through the support force of the trunk lid by the support rod and the sealing reaction force of the sealing accessory, the gap and face difference between the trunk lid and the white body stop under the force are obtained, the displacement values ​​of the sheet metal at different positions are analyzed, and the corresponding gap size between the trunk lid and the white body stop is redesigned to compensate for the influence of the support rod, gravity and the sealing accessory itself on the back door gap face difference. It can effectively control the gap between the trunk lid and the white body stop during installation to a certain extent, and improve the efficiency of the back door installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a flow chart of a method for designing a trunk structure in an embodiment of the present invention;

[0036] Figure 2It is a schematic diagram of the structure of the anti-interference sealing strip of the present invention;

[0037] Figure 3 A schematic diagram of the cross-section division for modeling the present invention;

[0038] Figure 4 Schematic diagram of the interference between the stopper of the body-in-white and the trunk lid in an embodiment of the present invention.

[0039] In the figure: 1. Clamping part; 10. Main body; 11. Arc lip; 12. Process rib; 13. Ratchet; 14. Teeth; 2. White body stop; 3. Bubble tube; 4. Plug tube; 41. Outer tube; 42. Inner tube; 43. Support bar; 5. Trunk lid; 6. Section. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0042] like Figure 1 As shown, on the one hand, the present invention provides a method for designing a trunk structure, comprising the following steps:

[0043] S1: Obtaining the supporting force of the support rod in the normal closing position of the trunk lid 5 and the sealing reaction force of the sealing accessory.

[0044] When the back door is closed, it is mainly affected by the sealing reaction force, the force of the support rod and gravity: the sealing reaction force is along the tangent direction of the stopper, the force of the support rod is along the axis direction of the support rod (diagonally downward), and the gravity is vertically downward. The combined force direction is diagonally downward.

[0045] In some optional embodiments, the supporting force F of the support rod when the trunk lid 5 is in the normally closed position is determined according to the formula F=nRT*a / (V-Li*(Aa))-P*a.

[0046] Among them, A is the piston area, a is the cross-sectional area of ​​the piston rod; P is the atmospheric pressure; V is the volume inside the cylinder when the strut is free, Li is the compression of the strut, n is the gas molar number; R is the ideal gas constant, and T is the temperature.

[0047] The gravity generated by the trunk lid 5 is G=m*g, where m is the mass of the trunk lid 5 and g is the acceleration of gravity.

[0048] In this example, the sealing accessories include sealing strips, limit blocks, buffer blocks, etc. Taking the sealing strip as an example, when solving the sealing reaction force of the sealing strip, the sealing strip is divided into several small sections.

[0049] According to formula F i =P×L i / 100, where L i is the length of the i-th sealing strip, P is the compression load per unit length of the sealing strip. In this example, the compression load per unit length is 100 mm, and F i is the reaction force of the i-th sealing strip. In this example, the sealing strip here is a conventional sealing strip.

[0050] S2: Establish a theoretical design model including the trunk lid 5, the body-in-white stop 2, the support rod and the sealing accessory, and load the gravity of the trunk lid, the supporting force of the support rod, and the sealing reaction force of the sealing accessory, and make the trunk lid 5 in a normal closed position to obtain the gap and surface difference between the trunk lid 5 and the body-in-white stop 2.

[0051] In this example, through CAE sealing reaction force verification analysis, the gap surface difference changes between the back door and the environmental parts in the X and Z directions are obtained. It can be seen that the gap surface difference changes between the back door and the top cover, side panel, taillight, rear bumper and other areas are inconsistent, and it is difficult for workers to adjust them online.

[0052] S3: According to the gap and face difference between the trunk lid 5 and the BIW stop 2, the design model of the trunk lid 5 and / or the BIW stop 2 is adjusted until the gap and face difference between the trunk lid 5 and the BIW stop 2 when the trunk lid 5 is normally closed is within a set range.

[0053] In this example, this is achieved by adjusting the height of the BIW stop 2 until the gap and the face difference between the trunk lid 5 and the BIW stop 2 when closed are within a set range.

[0054] When the trunk structure design method is used to design the trunk structure, the supporting force of the support rod in the normal closing position of the trunk lid 5 and the sealing reaction force of the sealing accessory are first obtained; then a theoretical design model including the trunk lid 5, the white body stop 2, the support rod and the sealing accessory is established, and the gravity of the trunk lid 5, the supporting force of the support rod, and the sealing reaction force of the sealing accessory are loaded, and the trunk lid 5 is placed in the normal closing position to obtain the gap and face difference between the trunk lid 5 and the white body stop 2; according to the gap and face difference between the trunk lid 5 and the white body stop 2, the design model of the trunk lid 5 and / or the white body stop 2 is adjusted until the gap and face difference between the trunk lid 5 and the white body stop 2 when normally closed is within a set range. In the established theoretical design model including the trunk lid 5 and the white body stop, the gap and face difference between the trunk lid 5 and the white body stop are within a set range. Through the support force of the trunk cover 5 under the support force of the support rod and the sealing reaction force of the sealing accessory, the gap and face difference between the trunk cover 5 and the white body stop 2 under the force are obtained, the sheet metal displacement values ​​at different positions are analyzed, and the corresponding gap size between the trunk cover 5 and the white body stop is designed again to compensate for the influence of the support rod, gravity and the sealing accessory itself on the back door gap face difference. To a certain extent, it can effectively control the gap between the trunk cover 5 and the white body stop during installation, and improve the efficiency of the back door installation.

[0055] S4: Determine the set length of the plug tube 4 set in the bubble tube 3 in the anti-interference sealing strip according to the interference area between the trunk lid 5 and the white body stop 2 in the clearance state.

[0056] Nowadays, the gap between the door and the surrounding parts is getting smaller and smaller. For designers, how to achieve refined design is particularly important. The gap between the trunk lid and the side panel is usually defined as 3.5mm, and the corner area of ​​the trunk shoulder is the most prone to paint scratches. This is mainly due to the following two reasons: manufacturing accuracy and poor edging of the trunk lid sheet metal in the corner area, which easily leads to a small gap.

[0057] Due to the limitation of the shape, the positions corresponding to the stopper 2 of the body-in-white and the trunk lid 5 cannot all be provided with limit blocks or buffer blocks, and the impact / closing moment of the trunk lid 5 cannot be protected. As a result, when the trunk lid is dynamically closed or driving on a bumpy road, it may interfere with the side panel metal and wear the paint, causing the sheet metal to rust and produce abnormal noise.

[0058] In some optional embodiments, step S4 includes:

[0059] S41: Determine the interference range between the trunk lid 5 and the stopper 2 of the body-in-white according to the clearance angle of the trunk lid 5 .

[0060] In this example, the trunk lid 5 is the rear tailgate / trunk of the car, and the trunk sealing strip is a rubber strip installed on the tailgate stop for sealing; over-closing is a test condition of closing the tailgate with great force, which is used to simulate violent door closing.

[0061] In some optional embodiments, step S411 includes:

[0062] S411: Acquire the clearance angle of the trunk lid 5.

[0063] In this example, over-closing is a test condition of closing the tailgate with great force, which is used to simulate violent closing. The difference between the closing angle under the extreme state under this condition and the closing angle under normal closing is the over-closing angle. In this example, in order to obtain the closing angle under the test condition of closing the tailgate with great force.

[0064] In some optional embodiments, in order to obtain the clearance angle of the trunk lid 5, the lock of the trunk lid 5 is adjusted to the extreme position; the trunk lid 5 is closed, and the clearance angle of the trunk lid 5 is determined.

[0065] In this example, the lock of the trunk lid 5 is adjusted to the extreme position, and the closing angle corresponding to this position is basically consistent with the closing angle under the test condition of closing the tailgate with great force. The difference between the closing angle at this time and the closing angle during normal closing is taken as the clearance angle.

[0066] S412: Establish a model including the trunk lid 5 and the white body stop 2, and make the trunk lid 5 be at a clearance angle position.

[0067] Since it is difficult to directly measure the gap and surface difference between the trunk lid 5 and the body-in-white stop 2, a model of the trunk lid 5 and the body-in-white stop 2 is established to place the trunk lid 5 at a clearance angle position, and the interference position between the trunk lid 5 and the body-in-white stop 2 is determined through the model.

[0068] S413: Draw a cross section at a set interval between the contact position of the trunk lid 5 and the body-in-white stop 2, and when the gap between the trunk lid 5 and the body-in-white stop 2 does not meet the set gap, or the surface difference between the trunk lid 5 and the body-in-white stop 2 does not meet the set surface difference, determine the interference between the trunk lid 5 and the body-in-white stop 2.

[0069] In this embodiment, considering the structure of the environmental part, the initial judgment position is not necessarily the worst position, and it is necessary to make a specific section of the established model to confirm. In this example, the set gap value between the trunk lid 5 and the white body stop 2 is 3.5±1.2mm, and the set face difference between the trunk lid 5 and the white body stop 2 is -1±1.2mm. Considering the limit state of the gap and face difference, multiple sections are drawn to judge. Figure 3 As shown, a section 6 is drawn every 10 mm.

[0070] Section contents such as Figure 3 As shown, during the closing process, the trunk lid 5 and the white body stop 2 include state A and state B. The interference between the trunk lid 5 and the white body stop 2 is as shown in FIG. Figure 4 As shown, state B represents a state where interference exists between the trunk lid 5 and the stop 2 of the body-in-white. Among all the cross-sections, all the cross-sections where interference exists between the trunk lid 5 and the stop 2 of the body-in-white are found, and the area formed by these cross-sections is the area with the greatest risk of interference.

[0071] S42: Determine the set length of the plug tube 4 set in the bubble tube 3 in the anti-interference sealing strip according to the interference range between the trunk lid 5 and the white body stop 2.

[0072] like Figure 2 As shown, in this embodiment, the plug tube 4 is designed as a double-layer tube structure, with an outer tube 41 and an inner tube 42 arranged therein, and the outer tube 41 and the inner tube 42 are connected by a plurality of support strips 43 arranged at intervals in the circumferential direction, so that the plug tube 4 can have sufficient supporting force to avoid interference between the trunk lid 5 and the white body stop 2, and reduce the possibility of interference between the trunk lid 5 and the side panel metal during dynamic closing or driving on bumpy roads. In addition, it is also convenient to adjust the supporting force of the plug tube 4 on the entire sealing strip, for example, by adjusting the number of support strips 43 arranged at intervals in the circumferential direction between the outer tube 41 and the inner tube 42 to adjust the supporting force on the sealing strip. It avoids the problem that the supporting force is too large, which makes it difficult to close the white body stop 2, and the problem that the supporting force is too small, which cannot solve the problem that the trunk lid 5 may interfere with the side panel metal during dynamic closing or driving on bumpy roads. The outer tube 41 and the inner tube 42 are both hexagonal, which can provide a certain support force to the bubble tube 3 and make the support force on the bubble tube 3 relatively uniform. In addition, in other embodiments, the plug tube 4 can also be made into a regular polygon with other numbers of sides, and the number of support bars 43 between the outer tube 41 and the inner tube 42 is the same as the number of sides of the outer tube 41 and the inner tube 42 to adjust the support force on the bubble tube 3. For example, when a greater support force is needed, the number of sides of the outer tube 41 and the inner tube 42 can be increased, and the number of support bars 43 can be increased. When a reduced support force is needed, the number of sides of the outer tube 41 and the inner tube 42 can be reduced, and the number of support bars 43 can be reduced. In addition, the support force on the bubble tube 3 can be adjusted by adjusting the material of the outer tube 41, the inner tube 42 and / or the support bar 43 to adjust the sealing reaction force of the entire sealing strip.

[0073] The anti-interference sealing strip comprises: a clamping part 1, a bubble tube 3 and a plug tube 4. The clamping part 1 is used to clamp on the white body stopper 2; the bubble tube 3 is connected to the clamping part 1; the plug tube 4 of a set length is arranged at a set position in the bubble tube 3 to support the bubble tube 3.

[0074] An arcuate lip 11 is provided on one side of the main body 10 of the clamping part 1 , and a process rib 12 is provided between the arcuate lip 11 and the main body of the clamping part 1 . The process rib 12 is located on the inner side of the arcuate lip 11 .

[0075] The clamping part 1 includes a main body 10, which is U-shaped, and the bubble tube 3 is arranged on one side of the closed end of the U-shaped bubble tube 3. At least one pawl 13 is arranged on the side walls on both sides of the inside of the U-shaped main body 10, and the pawls 13 on the side walls on both sides of the inside of the U-shaped main body 10 correspond to each other. The sum of the lengths of the pawls 13 at the corresponding positions on the side walls on both sides of the inside of the U-shaped main body 10 is greater than the spacing between the side walls on both sides of the inside of the U-shaped main body 10. Therefore, when the pawls 13 on the side walls on both sides of the inside of the U-shaped main body 10 are installed on the white body stop 2, the pawls 13 will be bent toward the closed end of the U-shaped main body 10, toward the closed end of the U-shaped main body 10. In addition, a plurality of teeth 14 are arranged on the other side of the U-shaped main body 10.

[0076] The plug tube 4 is made of sponge, which has good rebound and reset capabilities and can provide a certain support force. When the trunk lid 5 is closed, it provides a certain support reaction force to the bubble tube 3. After the trunk lid 5 is opened, it can return to its original state, and can provide a support reaction force for the bubble tube when the trunk lid 5 is closed again next time. Avoid interference between the trunk lid 5 and the white body stop 2, and reduce the possibility of interference between the trunk lid 5 and the side panel metal when the trunk lid is dynamically closed or driving on bumpy roads.

[0077] S43: Determine whether the reaction force of the sealing strip of the plug tube 4 provided in the bubble tube 3 meets the set luggage lock point sealing reaction force requirement; if not, adjust the compression load of the bubble tube 3 and / or the plug tube 4 until the requirement is met.

[0078] S431: Determine the total reaction moment of the bubble tube 3 according to the compression load and length of the bubble tube 3, and determine the total reaction moment of the plug tube 4 according to the compression load and length of the plug tube 4.

[0079] Taking the bubble tube 3 as an example, the bubble tube 3 is divided into several small sections.

[0080] According to formula F i =P×L i / 100, T i =F i ×S i ×cosα and Determine the total reaction moment T of bubble tube 3 泡管 , where L i is the length of the i-th section of the bubble tube 3, P is the unit compression load of the bubble tube 3, which is the compression load of 100 mm in this example, and F i is the reaction force of the i-th bubble tube 3, S iis the distance from the i-th bubble tube 3 to the hinge, α is the angle between the force direction and the hinge axis, T i is the reaction torque provided by the i-th section of the bubble tube 3, T 泡管 is the total reaction torque of the bubble tube 3.

[0081] S432: Determine the sealing reaction force of the luggage compartment lock point according to the total reaction torque of the bubble tube 3 and the total reaction torque of the plug tube 4.

[0082] In this embodiment, after the sealing strip torque is obtained, the sealing reaction force of the luggage box locking point can be calculated.

[0083] S433: According to the sealing reaction force of the luggage lock point, it is determined whether the reaction force of the sealing strip of the plug tube 4 provided in the bubble tube 3 meets the set sealing reaction force requirement of the luggage lock point.

[0084] In this example, if the sealing reaction force value meets the requirements of the trunk lid TB mode (the vehicle TB mode has index requirements for the trunk sealing reaction force, generally required to be >250N, to ensure that the vehicle has no abnormal noise), then it can be inferred that the compression load value of the sealing strip meets the requirements. On this basis, the unit compression load value of the sealing strip of bubble tube 3 with plug tube 4 can be designed. Considering the size of the interference value at the cross section, the compression load value of the sealing strip of bubble tube 3 with plug tube 4 can be inferred.

[0085] In addition, the sealing reaction force requirements of the trunk lock point can be verified through CAE simulation, and the over-closing verification of the trunk lid 5 is performed at a speed of 3.0 m / s. The plastic strain of the sheet metal meets the design index (the yield strength of the material is less than 0.2%. If this value is exceeded, the sheet metal will undergo permanent deformation). This shows that the solution of adding sealing strips and plugs to the key area can avoid the risk of dynamic interference.

[0086] In this way, when closing the trunk lid 5, the support force of the sealing strip at the interference position can be improved, the interference between the trunk lid 5 and the white body stop 2 can be avoided, and the possibility of interference between the trunk lid 5 and the side panel metal during dynamic closing or driving on bumpy roads can be reduced. In addition, this solution only requires the installation of a plug tube 4 of a set length and a set unit compression load in the bubble tube 3 at a set position, which only strengthens the support strength of the interference part, and will not greatly increase the sealing reaction force of the entire sealing strip, thereby causing the problem of being unable to close the door.

[0087] The present invention also provides a trunk structure, which is designed using any of the above trunk structure design methods.

[0088] The present invention also provides a vehicle and the above-mentioned trunk structure.

[0089] The trunk structure is designed by the above-mentioned trunk structure design method, and the vehicle includes the above-mentioned trunk structure. In the theoretical design model including the trunk lid 5 and the white body stop, the gap and face difference between the trunk lid 5 and the white body stop are within the set range. Through the trunk lid 5 under the support force of the strut and the sealing reaction force of the sealing accessory, the gap and face difference between the trunk lid 5 and the white body stop 2 are obtained, the sheet metal displacement values ​​at different positions are analyzed, and the corresponding gap size between the trunk lid 5 and the white body stop is designed to compensate for the influence of the strut, gravity and the sealing accessory itself on the back door gap face difference. It can effectively control the gap between the trunk lid 5 and the white body stop during installation to a certain extent, and improve the efficiency of the back door installation.

[0090] When the anti-interference luggage compartment sealing strip is used, the clamping part 1 is clamped on the white body stop 2. When the trunk lid 5 is closed, since a race tube of a set length is installed at the set position of the bubble tube 3, the set position is determined by the interference range between the trunk lid 5 and the white body stop 2, and the interference range is determined by the clearance angle of the trunk lid 5. The lock of the trunk lid 5 is adjusted to the limit position, that is, the clearance angle position, and the trunk lid 5 is closed. When the gap between the trunk lid 5 and the white body stop 2 does not meet the set gap, or the surface difference between the trunk lid 5 and the white body stop 2 does not meet the set surface difference, the interference between the trunk lid 5 and the white body stop 2 is determined. In this way, when the trunk lid 5 is closed, the supporting force of the sealing strip at the interference position can be increased, the interference between the trunk lid 5 and the white body stop 2 can be avoided, and the possibility of interference between the trunk lid 5 and the side panel metal during dynamic closing or driving on bumpy roads can be reduced. Moreover, this solution only requires installing a plug tube 4 of a set length and a set unit compression load in the bubble tube 3 at a set position, which only strengthens the supporting strength of the interference part and will not significantly increase the sealing reaction force of the entire sealing strip, thereby causing the problem of being unable to close the car door.

[0091] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0092] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0093] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for designing a trunk structure, characterized in that: The following steps are involved: Obtaining the supporting force of the support rod in the normal closed position of the trunk lid (5) and the sealing reaction force of the sealing accessory; A theoretical design model including a trunk lid (5), a body-in-white stopper (2), a support rod and a sealing accessory is established, and the gravity of the trunk lid, the supporting force of the support rod, and the sealing reaction force of the sealing accessory are loaded, and the trunk lid (5) is placed in a normally closed position to obtain the gap and surface difference between the trunk lid (5) and the body-in-white stopper (2); According to the gap and face difference between the trunk lid (5) and the body-in-white stop (2), the design model of the trunk lid (5) and / or the body-in-white stop (2) is adjusted until the gap and face difference between the trunk lid (5) and the body-in-white stop (2) when they are normally closed are within a set range; After the gap and the face difference between the trunk lid (5) and the white body stop (2) when closed are within a set range, the method further includes: determining a set length of a plug tube (4) set in a bubble tube (3) in an anti-interference sealing strip according to an interference area between the trunk lid (5) and the white body stop (2) in a clearance state; The method comprises: determining, based on the interference area between the trunk lid (5) and the white body stopper (2) in the clearance state, to set a plug tube (4) of a set length in the bubble tube (3) of the anti-interference sealing strip, comprising: Determining the interference range between the trunk cover (5) and the white body stop (2) according to the clearance angle of the trunk cover (5); Determine the set length of the plug tube (4) arranged in the bubble tube (3) of the anti-interference sealing strip according to the interference range between the trunk lid (5) and the white body stopper (2); It is determined whether the reaction force of the sealing strip of the plug tube (4) provided in the bubble tube (3) meets the set luggage case locking point sealing reaction force requirement; if not, the compression load of the bubble tube (3) and / or the plug tube (4) is adjusted until the requirement is met.

2. The trunk structure design method according to claim 1, characterized in that: Obtain the support force of the support rod when the trunk lid (5) is in the normal closed position, including: According to the formula F = nRT*a / (V-Li*(Aa))-P*a, determine the support force F of the support rod in the normal closed position of the trunk lid (5); Among them, A is the piston area, a is the cross-sectional area of ​​the piston rod; P is the atmospheric pressure; V is the volume inside the cylinder when the strut is free, Li is the compression of the strut, n is the gas molar number; R is the ideal gas constant, and T is the temperature.

3. The trunk structure design method according to claim 1, characterized in that: The design model of the trunk lid (5) and / or the body-in-white stop (2) is adjusted until the gap and the face difference between the trunk lid (5) and the body-in-white stop (2) when closed are within a set range, which is achieved by adjusting the height of the body-in-white stop (2).

4. The trunk structure design method according to claim 1, characterized in that: The method of determining the interference range between the trunk lid (5) and the body-in-white stop (2) according to the clearance angle of the trunk lid (5) comprises: Obtaining the clearance angle of the trunk lid (5); Establishing a model including a trunk lid (5) and a body-in-white stopper (2), and placing the trunk lid (5) in a clearance angle position; A cross section is drawn at a set interval between the contact position of the trunk lid (5) and the body-in-white stop (2); when the gap between the trunk lid (5) and the body-in-white stop (2) does not satisfy the set gap, or the surface difference between the trunk lid (5) and the body-in-white stop (2) does not satisfy the set surface difference, interference between the trunk lid (5) and the body-in-white stop (2) is determined.

5. The trunk structure design method according to claim 4, characterized in that: The step of obtaining the clearance angle of the trunk lid (5) comprises: Adjusting the lock of the trunk lid (5) to the limit position; The trunk lid (5) is closed, and the closing angle of the trunk lid (5) is determined.

6. The method for designing a trunk structure according to claim 1, characterized in that: The method of judging whether the reaction force of the sealing strip of the plug tube (4) provided in the bubble tube (3) meets the requirements of the sealing reaction force of the set luggage lock point comprises: Determining the total reaction moment of the bubble tube (3) according to the compression load and length of the bubble tube (3), and determining the total reaction moment of the plug tube (4) according to the compression load and length of the plug tube (4); Determine the sealing reaction force of the trunk lock point according to the total reaction torque of the bubble tube (3), the total reaction torque of the plug tube (4), and the support force of the trunk lid (5) in the normal closed position; According to the sealing reaction force of the luggage case locking point, it is determined whether the reaction force of the sealing strip of the plug tube (4) provided in the bubble tube (3) meets the set sealing reaction force requirement of the luggage case locking point.

7. A trunk structure, characterized in that: The design is performed using the trunk structure design method as described in any one of claims 1 to 6.

8. A vehicle, characterized in that: Including the trunk structure as described in claim 7.

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