A cross-sectional design method and device for determining the tailgate opening width of a vehicle

Abstract

The present invention relates to a cross-section design method and device for determining the width of the tailgate opening of a whole vehicle, which comprises: intercepting a horizontal plane at the taillight at one end of the tailgate in the modeling surface CAS, obtaining a first boundary line and a second boundary line of the tailgate split in the horizontal plane; wherein the first boundary line extends along the X direction, and the second boundary line extends along the Y direction; based on the first boundary line and the second boundary line, and constraining the shell size of the taillight, obtaining the taillight decorative part boundary in the horizontal plane; based on the taillight decorative part boundary, and constraining the sheet metal shell size on the inner side of the tailgate, obtaining the sheet metal boundary on the inner side of the tailgate in the horizontal plane; and calculating the tailgate opening width according to the sheet metal boundary. The present invention derives the taillight decorative part boundary according to the first boundary line and the second boundary line, and derives the sheet metal boundary through the taillight decorative part boundary, thereby calculating the tailgate opening width according to the sheet metal boundary line, thereby avoiding the problem that there is no 3D data of the inner side of the tailgate in the early stage, and the theoretical width of the tailgate cannot be known.

Description

Technical Field

[0001] The invention relates to the field of automobile tailgate design, and in particular to a section design method and device for determining the opening width of a tailgate of a whole vehicle. Background Art

[0002] During the preliminary research of vehicle models, human-machine engineers will set relevant goals for the convenience of entry and exit of the vehicle, convenience of storage and retrieval, etc. The width of the tailgate opening is one of them. The size of the opening directly affects the convenience of taking large items out of the trunk. The larger the opening, the better the human-machine attributes. Therefore, this value should be maximized as much as possible when designing the vehicle model.

[0003] In the related technology, there is no 3D data of the inside of the tailgate in the early stage of vehicle model pre-research, and it is impossible to directly know the theoretical width of the tailgate opening. Summary of the invention

[0004] The embodiment of the present invention provides a cross-sectional design method and device for determining the width of the tailgate opening of a whole vehicle, so as to solve the problem in the related art that there is no 3D data of the inner side of the tailgate in the early stage of vehicle model pre-research, and the theoretical width of the tailgate cannot be directly known.

[0005] In a first aspect, a cross-sectional design method for determining a tailgate opening width of a vehicle is provided, comprising the following steps:

[0006] A horizontal plane is cut at the taillight at one end of the tailgate in the styling surface CAS, and a first boundary line and a second boundary line of the tailgate split seam are obtained in the horizontal plane; wherein the first boundary line extends along the X direction, and the second boundary line extends along the Y direction;

[0007] Based on the first boundary line and the second boundary line, and by constraining the housing size of the taillight, a boundary of the taillight decoration is obtained in a horizontal plane;

[0008] Based on the boundary of the taillight trim, and by constraining the size of the sheet metal shell inside the tailgate, the sheet metal boundary inside the tailgate is obtained in the horizontal plane;

[0009] The tailgate opening width is calculated based on the sheet metal boundaries.

[0010] In some embodiments, the step of obtaining the boundary of the taillight decoration component in the horizontal plane based on the first boundary line and the second boundary line and constraining the shell size of the taillight includes:

[0011] Constraining and determining the position boundary of the taillight edge housing on the first boundary line;

[0012] The taillight trim boundary is determined based on the position boundary constraints of the taillight edge housing.

[0013] In some embodiments, constraining and determining the position boundary of the taillight edge housing on the first boundary line includes:

[0014] Performing fillet processing on the first boundary line and the second boundary line, and constraining the radius of the fillet;

[0015] At the same time, the width of the taillight edge shell along the X direction is constrained and defined to determine the position boundary of the taillight edge shell.

[0016] In some embodiments, determining the boundary of the taillight trim according to the position boundary constraint of the taillight edge housing includes:

[0017] The constraint defines that the depth dimension of the taillight is the first depth value;

[0018] On the basis of the position boundary of the tail lamp edge housing, the first depth value is extended in a direction away from the second boundary line to obtain the boundary of the tail lamp decoration part.

[0019] In some embodiments, the step of extending the first depth value in a direction away from the second boundary line based on the position boundary of the taillight edge housing to obtain the boundary of the taillight decoration part includes:

[0020] While extending the first depth value in a direction away from the second boundary line, the taillight trim is offset by a set distance in the Y direction to obtain a boundary of the taillight trim.

[0021] In some embodiments, the step of constraining the size of the sheet metal shell on the inner side of the tailgate based on the boundary of the taillight decoration part to obtain the sheet metal boundary on the inner side of the tailgate in the horizontal plane includes:

[0022] Extend the end of the boundary of the taillight decoration along the Y direction to obtain a first line segment; wherein the first line segment is the welding length of the sheet metal along the Y direction;

[0023] The end of the first line segment is extended roughly in an S-curve to obtain a second line segment; wherein the first bending extension direction is roughly toward the X direction, and the second bending extension direction is roughly toward the Y direction; wherein the second line segment is the bending arch length of the sheet metal;

[0024] The end of the second line segment is extended linearly to obtain a third line segment; wherein the first line segment, the second line segment and the third line segment form a sheet metal boundary, and the midpoint of the third line segment is a tangent point of the vertical boundary of the sealing strip.

[0025] In some embodiments, the end of the taillight decorative component boundary is extended along the Y direction to obtain the first line segment, including:

[0026] The end of the boundary of the taillight decoration is extended along the Y direction to obtain a fourth line segment; wherein the fourth line segment is the length of the tailgate sheet metal welding edge exceeding the reserved length, and the fourth line segment and the first line segment together form a sheet metal boundary.

[0027] In some embodiments, the end of the taillight decorative component boundary is extended along the Y direction to obtain a fourth line segment, including:

[0028] A fifth line segment is obtained along the Y direction at the end of the boundary of the taillight decoration; wherein the fifth line segment is the distance between the side of the taillight close to the tailgate seam and the welding edge of the tailgate sheet metal, and the fifth line segment, the fourth line segment and the first line segment together form a sheet metal boundary.

[0029] In some embodiments, the step of extending the end of the first line segment substantially in an S-curve to obtain the second line segment includes:

[0030] If the vehicle model is an SUV, the angle ɑ between the second line segment and the first line segment is 90 degrees. If the vehicle model is a sedan, the angle ɑ between the second line segment and the first line segment is greater than 90 degrees.

[0031] In a second aspect, a device for determining a tailgate opening width of a vehicle is provided, comprising:

[0032] A tailgate boundary establishment module, the tailgate boundary establishment module is used to intercept a horizontal plane for the taillight at one end of the tailgate in the design surface CAS, and obtain a first boundary line and a second boundary line of the tailgate split in the horizontal plane;

[0033] A taillight housing constraint module, wherein the taillight housing constraint module constrains the housing size of the taillight based on the first boundary line and the second boundary line, and obtains a taillight trim boundary in the horizontal plane;

[0034] A sheet metal constraint module, wherein the sheet metal constraint module constrains the size of the sheet metal shell inside the tailgate based on the boundary of the taillight trim, and obtains the sheet metal boundary of the inside of the tailgate in a horizontal plane;

[0035] A processing module is connected to the tailgate boundary establishment module, the taillight housing constraint module and the sheet metal constraint module by signal, and the processing module calculates the tailgate opening width according to the sheet metal boundary.

[0036] The beneficial effects brought about by the technical solution provided by the present invention include: the boundary of the taillight decoration can be derived based on the first boundary line and the second boundary line of the taillight close to the tailgate seam, and the sheet metal boundary can be derived through the boundary of the taillight decoration, so that the tailgate opening width can be calculated based on the sheet metal boundary, avoiding the problem that there is no 3D data of the inner side of the tailgate in the early stage of vehicle model pre-research and the theoretical width of the tailgate cannot be directly known. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A schematic flow chart of a cross-sectional design method for determining the width of a tailgate opening of a vehicle provided by an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of a cross-sectional structure of a tailgate provided by an embodiment of the present invention taken on a horizontal plane;

[0040] Figure 3 A schematic cross-sectional structure diagram of a boundary of a taillight decoration provided by an embodiment of the present invention;

[0041] Figure 4 for Figure 3 A partial enlarged view between the first boundary line in and the boundary of the taillight trim;

[0042] Figure 5 A schematic diagram of the cross-sectional structure of a sheet metal boundary provided in an embodiment of the present invention.

[0043] In the figure: 1, horizontal plane; 2, tailgate seam; 3, first boundary line; 4, second boundary line; 5, taillight decoration boundary; 6, sheet metal boundary; 7, sealing strip vertical boundary; L1, first line segment; L2, second line segment; L3, third line segment; L4, fourth line segment; L5, fifth line segment. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The embodiment of the present invention provides a cross-sectional design method and device for determining the width of the tailgate opening of a whole vehicle, so as to solve the problem in the related art that there is no 3D data of the inner side of the tailgate in the early stage of vehicle model pre-research, and the theoretical width of the tailgate cannot be directly known.

[0046] In the following embodiments, it should be noted that the X-axis direction in the drawings may be the length direction of the vehicle body, and the Y-axis direction may be the width direction of the vehicle body.

[0047] like Figure 1As shown, an embodiment of the present invention provides a cross-sectional design method for determining the width of a tailgate opening of a vehicle, which may include the following steps:

[0048] Step S1: Figure 2 As shown, a horizontal plane 1 is cut at the taillight at one end of the tailgate in the styling surface CAS, and a first boundary line 3 and a second boundary line 4 of the tailgate split 2 are obtained in the horizontal plane 1; wherein the first boundary line 3 extends along the X direction, and the second boundary line 4 extends along the Y direction;

[0049] Step S2: Figure 3 As shown, based on the first boundary line 3 and the second boundary line 4 and by constraining the shell size of the taillight, a taillight trim boundary 5 is obtained in the horizontal plane 1;

[0050] Step S3: Figure 3 and Figure 5 As shown, based on the taillight trim boundary 5 and constraining the size of the sheet metal shell on the inner side of the tailgate, the sheet metal boundary 6 on the inner side of the tailgate is obtained in the horizontal plane 1;

[0051] Step S4: Calculate the tailgate opening width according to the sheet metal boundary 6 .

[0052] Among them, the size of the tailgate opening is directly affected by the styling style, that is, the tailgate seam 2. The early styling project will give priority to outputting the CAS data of the outer surface of the vehicle. The engineering personnel need to deduce the feasible tailgate sealing strip position through the tailgate seam 2 position of the external CAS data. The distance between the left and right sealing strips is the opening width of the tailgate; the taillight trim boundary 5 can be derived based on the known first boundary line 3 and second boundary line 4 of the taillight close to the tailgate seam, and the sheet metal boundary 6 can be derived through the taillight trim boundary 5, so that the tailgate opening width can be calculated based on the sheet metal boundary 6, avoiding the problem that there is no 3D data on the inside of the tailgate in the early stage of vehicle model pre-research, and the theoretical width of the tailgate cannot be directly known.

[0053] In some embodiments, in step S1 , a horizontal plane 1 may be intercepted at the middle position of the taillight in the design surface CAS (ie, the middle of the taillight is the intercepted horizontal plane 1 along the height direction of the vehicle body).

[0054] In some embodiments, in step S2, based on the first boundary line 3 and the second boundary line 4, and constraining the shell size of the taillight, obtaining the taillight decoration part boundary 5 in the horizontal plane 1 may include the following specific steps:

[0055] Step S21: constraining and determining the position boundary of the taillight edge housing on the first boundary line 3;

[0056] Step S22: determining the taillight decoration boundary 5 according to the position boundary constraint of the taillight edge housing.

[0057] In some embodiments, in step S21, that is, in the step of constraining and determining the position boundary of the taillight edge housing on the first boundary line 3, the following steps may be included:

[0058] Step S211: performing fillet processing on the first boundary line 3 and the second boundary line 4, and constraining the radius of the fillet;

[0059] Step S212: simultaneously, a constraint is defined on the width of the taillight edge shell along the X direction to determine the position boundary of the taillight edge shell.

[0060] Specifically, Figure 4 As shown, the first boundary line 3 and the second boundary line 4 are rounded, and the radius of the rounded corners is constrained. The radius of the rounded corners can be 2.5 mm, and the middle position of the rounded corners is selected as the constraint starting point to ensure the accuracy of the subsequent taillight decorative part boundary 5; wherein, as Figure 3 As shown, the width of the taillight edge shell along the X direction is constrained and defined to determine the position boundary of the taillight edge shell. The width constraint dimension of the taillight edge shell along the X direction can be b=5.0 mm, so that the taillight edge shell is taken into account to ensure the accuracy of the subsequent taillight decorative part boundary 5.

[0061] In some embodiments, in step S22, that is, determining the taillight decoration part boundary 5 according to the position boundary constraint of the taillight edge housing, the following steps may be included:

[0062] Step S221: constraining and defining the depth dimension of the taillight to be a first depth value;

[0063] Step S222 : on the basis of the position boundary of the taillight edge housing, extending the first depth value in a direction away from the second boundary line 4 to obtain the taillight decoration component boundary 5 .

[0064] like Figure 3 As shown, based on the position boundary of the taillight edge shell after being constrained, the longitudinal dimension of the taillight is constrained to be defined as a first depth value of a=50 mm, and the taillight decoration boundary 5 is obtained.

[0065] In some embodiments, in step S222, that is, based on the position boundary of the taillight edge housing, extending the first depth value in a direction away from the second boundary line 4 to obtain the taillight decoration part boundary 5, the following steps may be included:

[0066] Step S2221 : while extending the first depth value in a direction away from the second boundary line 4 , offset along the Y direction by a set distance to obtain the taillight decoration component boundary 5 .

[0067] Among them, Figure 4As shown, based on the constraint definition that the depth dimension of the taillight is a first depth value of a=50 mm, and the offset setting distance along the Y direction is c=0.6 mm, a true and accurate taillight decoration boundary 5 is finally obtained.

[0068] In some embodiments, in step S3, that is, based on the taillight trim boundary 5 and constraining the sheet metal shell size on the inner side of the tailgate, obtaining the sheet metal boundary 6 on the inner side of the tailgate in the horizontal plane 1 may include the following steps:

[0069] Step S33: Extend the end of the taillight decoration part boundary 5 along the Y direction to obtain a first line segment L1; wherein the first line segment L1 is the welding length of the sheet metal along the Y direction;

[0070] Step S34: Extend the end of the first line segment L1 in a substantially S-curve to obtain a second line segment L2; wherein the first bending extension direction is substantially toward the X direction, and the second bending extension direction is substantially toward the Y direction; wherein the second line segment L2 is the bending arch length of the sheet metal;

[0071] Step S35: linearly extend the end of the second line segment L2 to obtain a third line segment L3; wherein the first line segment L1, the second line segment L2 and the third line segment L3 form a sheet metal boundary 6, and the midpoint of the third line segment L3 is the tangent point of the vertical boundary 7 of the sealing strip.

[0072] Specifically, Figure 5 As shown, three dimensional constraints are performed based on the end of the constrained taillight trim boundary 5, the first constraint is the first line segment L1 (the first line segment L1 is the welding length of the sheet metal along the Y direction); the second constraint is the second line segment L2 (the second line segment L2 is the bending arch length of the sheet metal); the third constraint is the third line segment L3 (the third line segment L3 is the first straight line segment after the sheet metal is bent and arched, and the midpoint of the straight line segment is the tangent point with the vertical boundary 7 of the sealing strip), wherein, according to the distance d1 between the vertical boundary 7 of the sealing strip and the first boundary line 3, the distance d2 between the first boundary lines 3 on both sides of the vehicle body minus twice the distance d1 between the vertical boundary 7 of the sealing strip and the first boundary line 3 can be used to obtain the distance d3 between the vertical boundaries 7 of the sealing strip on both sides, so that the theoretical width of the tailgate can be known (the theoretical width of the tailgate can be equal to d3=d2-2d1).

[0073] Exemplarily, the constraint dimension of the first line segment L1 may be L1=24.3 mm, the constraint dimension of the second line segment L2: the radius of the first bend may be 6.8 mm, and the radius of the second bend may be 8 mm; the constraint dimension of the third line segment L3 may be L3=22 mm.

[0074] Furthermore, in the second line segment L2 constraint dimension, after the first bend, a 3 mm straight length can be extended along the end of the line segment for transition, and then a second bend can be performed, thereby further improving the accuracy of the position confirmation of the vertical boundary 7 of the sealing strip.

[0075] In some embodiments, before step S33, that is, before the end of the taillight decoration part boundary 5 is extended along the Y direction to obtain the first line segment L1, the following steps may be further included:

[0076] Step S32: Figure 5 As shown, the end of the taillight trim boundary 5 is extended along the Y direction to obtain a fourth line segment L4; wherein the fourth line segment L4 is the length of the tailgate sheet metal welding edge exceeding the reserved length, and the fourth line segment L4 and the first line segment L1 together form a sheet metal boundary 6.

[0077] The length dimension of the tailgate sheet metal welding edge exceeding the reserved length may be taken into consideration, so as to further improve the accuracy of the position confirmation of the vertical boundary 7 of the sealing strip.

[0078] For example, the length dimension constrained by the fourth line segment L4 may be L4=5 mm.

[0079] In some embodiments, Figure 5 As shown, before step S32, that is, before the end of the taillight decoration part boundary 5 is extended along the Y direction to obtain the fourth line segment L4, the following steps may also be included:

[0080] Step S31: Obtain a fifth line segment L5 along the Y direction at the end of the taillight trim boundary 5; wherein the fifth line segment L5 is the distance between the side of the taillight close to the tailgate seam 2 and the tailgate sheet metal welding edge, and the fifth line segment L5, the fourth line segment L4 and the first line segment L1 together form a sheet metal boundary 6.

[0081] The distance between the side of the taillight close to the tailgate split 2 and the welding edge of the tailgate sheet metal may be taken into consideration to further improve the accuracy of the position confirmation of the vertical boundary 7 of the sealing strip.

[0082] Exemplarily, the length dimension constrained by the fifth line segment L5 may be L5=11.9 mm.

[0083] In some embodiments, in step S34, that is, extending the end of the first line segment L1 substantially in an S-curve to obtain the second line segment L2, the following steps may be included:

[0084] If the vehicle model is an SUV, the angle ɑ between the second line segment L2 and the first line segment L1 is 90 degrees. If the vehicle model is a sedan, the angle ɑ between the second line segment L2 and the first line segment L1 is greater than 90 degrees.

[0085] In some embodiments, an embodiment of the present invention provides a device for determining the width of a tailgate opening of a whole vehicle, comprising: a tailgate boundary establishment module, the tailgate boundary establishment module is used to intercept a horizontal plane 1 for the taillight at one end of the tailgate in the styling surface CAS, and intercept a first boundary line 3 and a second boundary line 4 of the tailgate seam 2 on the horizontal plane 1; a taillight housing constraint module, the taillight housing constraint module is based on the first boundary line 3 and the second boundary line 4, and constrains the housing size of the taillight, and obtains a taillight decorative part boundary 5 in the horizontal plane 1; a sheet metal constraint module, the sheet metal constraint module is based on the taillight decorative part boundary 5, and constrains the sheet metal housing size on the inner side of the tailgate, and obtains a sheet metal boundary 6 on the inner side of the tailgate in the horizontal plane 1; a processing module, the processing module is signal-connected to the tailgate boundary establishment module, the taillight housing constraint module and the sheet metal constraint module, and the processing module calculates the tailgate opening width according to the sheet metal boundary 6.

[0086] Among them, the size of the tailgate opening is directly affected by the styling style, namely the tailgate seam 2. The early styling project will give priority to outputting the CAS data of the outer surface of the vehicle. The engineering personnel need to deduce the feasible tailgate sealing strip position through the tailgate seam 2 position of the external CAS data. The distance between the left and right sealing strips is the opening width of the tailgate; the taillight housing constraint module can deduce the taillight decorative part boundary 5 based on the known first boundary line 3 and second boundary line 4 of the taillight close to the tailgate seam. The sheet metal constraint module can deduce the sheet metal boundary 6 through the taillight decorative part boundary 5. The processing module can calculate the tailgate opening width based on the sheet metal boundary 6, thus avoiding the problem that there is no 3D data on the inside of the tailgate in the early stage of vehicle model pre-research, and the theoretical width of the tailgate cannot be directly known.

[0087] Specifically, the following steps may be included:

[0088] Step S1: Figure 2 As shown, the tailgate boundary establishment module intercepts a horizontal plane 1 at the taillight at one end of the tailgate in the styling surface CAS, and obtains a first boundary line 3 and a second boundary line 4 of the tailgate split 2 in the horizontal plane 1; wherein the first boundary line 3 extends along the X direction, and the second boundary line 4 extends along the Y direction;

[0089] Step S2: Figure 3 As shown, the taillight housing constraint module constrains the housing size of the taillight based on the first boundary line 3 and the second boundary line 4, and obtains the taillight decoration part boundary 5 in the horizontal plane 1;

[0090] Step S3: Figure 3 and Figure 5 As shown, the sheet metal constraint module is based on the taillight trim boundary 5 and constrains the sheet metal shell size inside the tailgate, and obtains the sheet metal boundary 6 inside the tailgate in the horizontal plane 1;

[0091] Step S4: the processing module calculates the tailgate opening width according to the sheet metal boundary 6 .

[0092] In some embodiments, in step S1 , the tailgate boundary establishing module may intercept a horizontal plane 1 at the middle position of the taillight in the design surface CAS (ie, along the vehicle body height direction, the middle of the taillight is the intercepted horizontal plane 1 ).

[0093] In some embodiments, in step S2, based on the first boundary line 3 and the second boundary line 4, and constraining the shell size of the taillight, obtaining the taillight decoration part boundary 5 in the horizontal plane 1 may include the following specific steps:

[0094] Step S21: the taillight housing constraint module constrains and determines the position boundary of the taillight edge housing on the first boundary line 3;

[0095] Step S22: the taillight housing constraint module determines the taillight decoration boundary 5 according to the position boundary constraint of the taillight edge housing.

[0096] In some embodiments, in step S21, that is, in the step of constraining and determining the position boundary of the taillight edge housing on the first boundary line 3, the following steps may be included:

[0097] Step S211: the taillight housing constraint module performs rounding processing on the first boundary line 3 and the second boundary line 4, and constrains the radius of the rounded corners;

[0098] Step S212: At the same time, the taillight housing constraint module defines constraints on the width of the taillight edge housing along the X direction to determine the position boundary of the taillight edge housing.

[0099] Specifically, Figure 4 As shown, the first boundary line 3 and the second boundary line 4 are rounded, and the radius of the rounded corners is constrained. The radius of the rounded corners can be 2.5 mm, and the middle position of the rounded corners is selected as the constraint starting point to ensure the accuracy of the subsequent taillight decorative part boundary 5; wherein, as Figure 3 As shown, the width of the taillight edge shell along the X direction is constrained and defined to determine the position boundary of the taillight edge shell. The width constraint dimension of the taillight edge shell along the X direction can be b=5.0 mm, so that the taillight edge shell is taken into account to ensure the accuracy of the subsequent taillight decorative part boundary 5.

[0100] In some embodiments, in step S22, that is, determining the taillight decoration part boundary 5 according to the position boundary constraint of the taillight edge housing, the following steps may be included:

[0101] Step S221: the taillight housing constraint module constrains and defines the depth dimension of the taillight to be a first depth value;

[0102] Step S222 : the taillight housing constraint module extends the first depth value in a direction away from the second boundary line 4 based on the position boundary of the taillight edge housing to obtain the taillight decoration component boundary 5 .

[0103] like Figure 3 As shown, based on the position boundary of the taillight edge shell after being constrained, the longitudinal dimension of the taillight is constrained to be defined as a first depth value of a=50 mm, and the taillight decoration boundary 5 is obtained.

[0104] In some embodiments, in step S222, that is, based on the position boundary of the taillight edge housing, extending the first depth value in a direction away from the second boundary line 4 to obtain the taillight decoration part boundary 5, the following steps may be included:

[0105] Step S2221 : the taillight housing constraint module extends the first depth value in a direction away from the second boundary line 4 , and offsets the set distance in the Y direction to obtain the taillight decoration component boundary 5 .

[0106] Among them, Figure 4 As shown, based on the constraint definition that the depth dimension of the taillight is a first depth value of a=50 mm, and the offset setting distance along the Y direction is c=0.6 mm, a true and accurate taillight decoration boundary 5 is finally obtained.

[0107] In some embodiments, in step S3, that is, based on the taillight trim boundary 5 and constraining the sheet metal shell size on the inner side of the tailgate, obtaining the sheet metal boundary 6 on the inner side of the tailgate in the horizontal plane 1 may include the following steps:

[0108] Step S33: the sheet metal constraint module extends the end of the taillight decoration component boundary 5 along the Y direction to obtain a first line segment L1; wherein the first line segment L1 is the welding length of the sheet metal along the Y direction;

[0109] Step S34: the sheet metal constraint module extends the end of the first line segment L1 approximately in an S-curve to obtain a second line segment L2; wherein the first bending extension direction is approximately toward the X direction, and the second bending extension direction is approximately toward the Y direction; wherein the second line segment L2 is the bending arch length of the sheet metal;

[0110] Step S35: the sheet metal constraint module linearly extends the end of the second line segment L2 to obtain a third line segment L3; wherein the first line segment L1, the second line segment L2 and the third line segment L3 form a sheet metal boundary 6, and the midpoint of the third line segment L3 is the tangent point of the vertical boundary 7 of the sealing strip.

[0111] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. 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 invention can be understood according to the specific circumstances.

[0112] It should be noted that, in the present invention, 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 existence of other identical elements in the process, method, article or device including the elements.

[0113] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A cross-sectional design method for determining the width of a tailgate opening of a vehicle, characterized in that: It includes the following steps: A horizontal plane (1) is cut at the taillight at one end of the tailgate in the styling surface CAS, and a first boundary line (3) and a second boundary line (4) of the tailgate split seam (2) are obtained in the horizontal plane (1); wherein the first boundary line (3) extends along the X direction, and the second boundary line (4) extends along the Y direction; Based on the first boundary line (3) and the second boundary line (4), and by constraining the housing size of the taillight, a taillight decoration part boundary (5) is obtained in the horizontal plane (1); Based on the taillight trim boundary (5), and by constraining the size of the sheet metal shell on the inner side of the tailgate, the sheet metal boundary (6) on the inner side of the tailgate is obtained in the horizontal plane (1); Calculate the tailgate opening width according to the sheet metal boundary (6); The method of obtaining the sheet metal boundary (6) on the inner side of the tailgate in the horizontal plane (1) based on the boundary (5) of the taillight decoration and constraining the size of the sheet metal shell on the inner side of the tailgate comprises: The end of the taillight decorative component boundary (5) is extended along the Y direction to obtain a first line segment (L1); wherein the first line segment (L1) is the welding length of the sheet metal along the Y direction; The end of the first line segment (L1) is extended roughly in an S-curve to obtain a second line segment (L2); wherein the first bending extension direction is roughly toward the X direction, and the second bending extension direction is roughly toward the Y direction; wherein the second line segment (L2) is the bending arch length of the sheet metal; The end of the second line segment (L2) is extended linearly to obtain a third line segment (L3); wherein the first line segment (L1), the second line segment (L2) and the third line segment (L3) form a sheet metal boundary (6), and the midpoint of the third line segment (L3) is a tangent point to the vertical boundary (7) of the sealing strip.

2. The cross-section design method for determining the width of the tailgate opening of a whole vehicle as claimed in claim 1, characterized in that: The method of obtaining the taillight decoration part boundary (5) in the horizontal plane (1) based on the first boundary line (3) and the second boundary line (4) and constraining the shell size of the taillight comprises: Constraining and determining the position boundary of the taillight edge housing on the first boundary line (3); The taillight trim boundary is determined according to the position boundary constraint of the taillight edge housing (5).

3. The cross-section design method for determining the width of the tailgate opening of a whole vehicle as claimed in claim 2, characterized in that: The method of constraining and determining the position boundary of the taillight edge housing on the first boundary line (3) includes: Performing fillet processing on the first boundary line (3) and the second boundary line (4), and constraining the radius of the fillet; At the same time, the width of the taillight edge shell along the X direction is constrained and defined to determine the position boundary of the taillight edge shell.

4. The cross-section design method for determining the width of the tailgate opening of a whole vehicle as claimed in claim 2, characterized in that: The step of determining the boundary of the taillight decoration part according to the position boundary constraint of the taillight edge housing (5) comprises: The constraint defines that the depth dimension of the taillight is the first depth value; On the basis of the position boundary of the taillight edge housing, the first depth value is extended in a direction away from the second boundary line (4) to obtain the taillight decoration part boundary (5).

5. The cross-section design method for determining the width of the tailgate opening of a whole vehicle as claimed in claim 4, characterized in that: The method of extending the first depth value in a direction away from the second boundary line (4) based on the position boundary of the taillight edge housing to obtain the taillight decorative part boundary (5) comprises: While extending the first depth value in a direction away from the second boundary line (4), the taillight decoration part boundary (5) is obtained by offsetting the set distance in the Y direction.

6. The cross-section design method for determining the width of the tailgate opening of a whole vehicle as claimed in claim 1, characterized in that: The end of the taillight decorative part boundary (5) is extended along the Y direction to obtain the first line segment (L1), including: The end of the taillight decorative component boundary (5) is extended along the Y direction to obtain a fourth line segment (L4); wherein the fourth line segment (L4) is the length of the tailgate sheet metal welding edge exceeding the reserved length, and the fourth line segment (L4) and the first line segment (L1) together form a sheet metal boundary (6).

7. The cross-section design method for determining the width of the tailgate opening of a whole vehicle as claimed in claim 6, characterized in that: The end of the taillight decorative part boundary (5) is extended along the Y direction to obtain a fourth line segment (L4), which includes: A fifth line segment (L5) is obtained along the Y direction at the end of the taillight decorative part boundary (5); wherein the fifth line segment (L5) is the distance between the side of the taillight close to the tailgate seam (2) and the tailgate sheet metal welding edge, and the fifth line segment (L5), the fourth line segment (L4) and the first line segment (L1) together form a sheet metal boundary (6).

8. The cross-section design method for determining the width of the tailgate opening of a whole vehicle as claimed in claim 1, characterized in that: The step of extending the end of the first line segment (L1) substantially in an S-curve to obtain the second line segment (L2) comprises: If the vehicle is an SUV, the angle between the second line segment (L2) and the first line segment (L1) is ɑ is 90 degrees. If the vehicle is a sedan, the angle between the second line segment (L2) and the first line segment (L1) is ɑ Greater than 90 degrees.

9. A device for determining the width of a tailgate opening of a vehicle, characterized in that: It includes: A tailgate boundary establishment module, the tailgate boundary establishment module is used to intercept a horizontal plane (1) for the taillight at one end of the tailgate in the design surface CAS, and to intercept a first boundary line (3) and a second boundary line (4) of a tailgate split seam (2) on the horizontal plane (1); A taillight housing constraint module, wherein the taillight housing constraint module constrains the housing size of the taillight based on the first boundary line (3) and the second boundary line (4), and obtains a taillight decorative part boundary (5) in the horizontal plane (1); A sheet metal constraint module, wherein the sheet metal constraint module constrains the size of the sheet metal shell inside the tailgate based on the taillight decorative part boundary (5) and obtains the sheet metal boundary (6) inside the tailgate in the horizontal plane (1); the sheet metal constraint module constrains the size of the sheet metal shell inside the tailgate based on the taillight decorative part boundary (5) and obtains the sheet metal boundary (6) inside the tailgate in the horizontal plane (1), comprising: The end of the taillight decorative component boundary (5) is extended along the Y direction to obtain a first line segment (L1); wherein the first line segment (L1) is the welding length of the sheet metal along the Y direction; The end of the first line segment (L1) is extended roughly in an S-curve to obtain a second line segment (L2); wherein the first bending extension direction is roughly toward the X direction, and the second bending extension direction is roughly toward the Y direction; wherein the second line segment (L2) is the bending arch length of the sheet metal; The end of the second line segment (L2) is extended linearly to obtain a third line segment (L3); wherein the first line segment (L1), the second line segment (L2) and the third line segment (L3) form a sheet metal boundary (6), and the midpoint of the third line segment (L3) is a tangent point of the vertical boundary (7) of the sealing strip; A processing module is connected to the tailgate boundary establishment module, the taillight housing constraint module and the sheet metal constraint module by signal, and the processing module calculates the tailgate opening width according to the sheet metal boundary (6).

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