Automobile trunk lid routing design method, arrangement method and design equipment

Abstract

The invention provides an automobile trunk lid routing design method, design equipment and an arrangement method, and belongs to the field of automobile parts, the optimal coordinate value of a second coordinate of a second preset point on a first automobile body plane is determined in a three-dimensional model of an automobile according to a first coordinate of a first preset point fixed on a trunk lid camber beam, and after the optimal coordinate value of the second coordinate is determined, a second preset point corresponding to the optimal coordinate value and the first preset point serve as fixing points of the automobile trunk lid wire harness on the first automobile body plane and the trunk camber beam respectively. Due to the fact that the position of the fixing point of the automobile trunk lid wire harness on the first automobile body plane is optimized, the redundant part of the automobile trunk lid wire harness can be minimized in the whole movement process of opening and closing of the automobile trunk lid, interference abrasion between the automobile trunk lid wire harness and a tail door hinge mechanism is avoided, and the fault risk is reduced.

Description

Technical Field

[0001] The present application relates to the field of automotive parts, and in particular to a method for designing and arranging wiring for a trunk lid of an automobile, and a design device. Background Art

[0002] Typically, the trunk lid wiring harness is led out from the main body of the vehicle and extends along the curved beam of the trunk lid to the trunk lid body. The trunk lid wiring harness is used to power electrical appliances arranged on the trunk lid, such as the reversing image camera and brake lights.

[0003] The curved beam of the trunk lid will match the hinge during the opening and closing process of the trunk lid, and move with the trunk lid. The length of the trunk lid wiring harness from the main body to the curved beam must meet the movement range of the trunk lid.

[0004] As the trunk lid moves, when the trunk lid moves to a certain angle, the trunk lid wiring harness may become redundant. The redundant part of the trunk lid wiring harness may interfere with and wear the tailgate hinge mechanism, creating a risk of failure. Summary of the Invention

[0005] In view of this, the present application provides a method for designing wiring for a car trunk lid, which can minimize the redundancy of the trunk lid wiring harness and reduce the risk of failure. The method includes:

[0006] In one aspect, the present application provides a method for designing wiring for a car trunk lid, the method comprising:

[0007] Get the 3D model of the car.

[0008] In the three-dimensional model, the first coordinate of a first preset point on the trunk lid curved beam and the second coordinate of a second preset point on the first vehicle body plane are obtained, where the second coordinate is an undetermined coordinate and the first vehicle body plane is the top surface of the trunk accommodating space.

[0009] An optimal coordinate value of the second coordinate is determined based on the first coordinate.

[0010] The second preset point corresponding to the optimal coordinate value is used as the fixing point of the automobile trunk lid wiring harness on the first vehicle body plane, and the first preset point is used as the fixing point of the automobile trunk lid wiring harness on the trunk curved beam. The automobile trunk lid wiring harness is used to electrically connect the electrical connectors respectively set at the first preset point and the second preset point.

[0011] Optionally, determining the optimal coordinate value of the second coordinate according to the first coordinate includes:

[0012] A plurality of first coordinates of a first preset point on the trunk lid curved beam corresponding to each opening and closing angle of the trunk lid are obtained.

[0013] The plurality of first coordinates are projected onto the first vehicle body plane to obtain a plurality of projected coordinates.

[0014] A distance formula group is established to represent a plurality of connection distances corresponding one to one between the second coordinate and the plurality of projection coordinates, wherein known coefficients in the distance formula group are the plurality of projection coordinates, the independent variable is the second coordinate, and the dependent variable is the plurality of connection distances.

[0015] The distance formula group is solved to obtain the coordinate value of the second coordinate corresponding to the minimum difference between the multiple connection distances, which is used as the optimal coordinate value.

[0016] Optionally, the plurality of opening and closing angles include a closing angle, an opening one-third angle, an opening two-thirds angle and a maximum opening angle.

[0017] Optionally, setting a second preset point on the first vehicle body plane includes:

[0018] A second preset point is set within a first range of the first vehicle body plane, and the first range does not coincide with the central cross section of the vehicle body.

[0019] Optionally, setting a second preset point on the first vehicle body plane includes:

[0020] A first range is selected on a first vehicle body plane.

[0021] The rotation axis of the trunk lid curved beam is projected onto the first vehicle body plane to obtain a projection line.

[0022] A second preset point is set on the first line segment where the projection line falls within the first range.

[0023] On the other hand, the present application also provides a method for arranging wiring for a car trunk lid, the method comprising:

[0024] The first preset point and the second preset point are determined using the automobile trunk lid routing design method of the first aspect.

[0025] A first connector is arranged at a first preset point, and the first connector is electrically connected to an electrical appliance arranged on the trunk lid.

[0026] A second connector is arranged at a second preset point, and the second connector is electrically connected to the vehicle electronic control unit and the power supply unit.

[0027] The first connector and the second connector are connected by a trunk lid wiring harness, and a first section of the trunk lid wiring harness close to the first connector is fixed on the trunk lid curved beam, and the parts other than the first section are suspended in the air.

[0028] On the other hand, the present application also provides a car trunk lid wiring design device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the following is achieved:

[0029] Get the 3D model of the car.

[0030] In the three-dimensional model, the first coordinate of a first preset point on the trunk lid curved beam and the second coordinate of a second preset point on the first vehicle body plane are obtained, where the second coordinate is an undetermined coordinate and the first vehicle body plane is the top surface of the trunk accommodating space.

[0031] An optimal coordinate value of the second coordinate is determined based on the first coordinate.

[0032] The second preset point corresponding to the optimal coordinate value is used as the fixing point of the automobile trunk lid wiring harness on the first vehicle body plane, and the first preset point is used as the fixing point of the automobile trunk lid wiring harness on the trunk curved beam. The automobile trunk lid wiring harness is used to electrically connect the electrical connectors respectively set at the first preset point and the second preset point.

[0033] Optionally, determining the optimal coordinate value of the second coordinate according to the first coordinate includes:

[0034] A plurality of first coordinates of a first preset point on the trunk lid curved beam corresponding to each opening and closing angle of the trunk lid are obtained.

[0035] The plurality of first coordinates are projected onto the first vehicle body plane to obtain a plurality of projected coordinates.

[0036] A distance formula group is established to represent a plurality of connection distances corresponding one to one between the second coordinate and the plurality of projection coordinates, wherein known coefficients in the distance formula group are the plurality of projection coordinates, the independent variable is the second coordinate, and the dependent variable is the plurality of connection distances.

[0037] The distance formula group is solved to obtain the coordinate value of the second coordinate corresponding to the minimum difference between the multiple connection distances, which is used as the optimal coordinate value.

[0038] Optionally, the plurality of opening and closing angles include a closing angle, an opening one-third angle, an opening two-thirds angle and a maximum opening angle.

[0039] Optionally, setting a second preset point on the first vehicle body plane includes:

[0040] A first range is selected on a first vehicle body plane.

[0041] The rotation axis of the trunk lid curved beam is projected onto the first vehicle body plane to obtain a projection line.

[0042] A second preset point is set on the first line segment where the projection line falls within the first range.

[0043] On the other hand, the present application also provides a method for arranging wiring for a car trunk lid, the method comprising:

[0044] The position of a first preset point on the trunk lid curved beam is determined according to the first coordinate, a first connector is arranged at the first preset point, and the first connector is electrically connected to an electrical appliance arranged on the trunk lid.

[0045] The position of a second preset point on the first vehicle body plane is determined according to the second coordinate. The first vehicle body plane is the top surface of the luggage compartment storage space. A second connector is arranged at the second preset point. The second connector is electrically connected to the vehicle electronic control unit and the power supply unit.

[0046] The first connector and the second connector are connected by a trunk lid wiring harness, and a first section of the trunk lid wiring harness close to the first connector is fixed on the trunk lid curved beam, and the parts other than the first section are suspended in the air.

[0047] Using the automotive trunk lid routing design method provided in this application, the optimal coordinate value of the second coordinate of a second preset point on a first vehicle body plane is determined in a three-dimensional vehicle model based on the first coordinate of a first preset point fixed on a trunk lid curved beam. The first vehicle body plane is the top surface of the trunk storage space. After determining the optimal coordinate value of the second coordinate, the second preset point and the first preset point corresponding to the optimal coordinate value are used as fixed points for the trunk lid wiring harness on the first vehicle body plane and on the trunk curved beam, respectively. The trunk lid wiring harness is electrically connected to the electrical connectors provided at the first preset point and the second preset point, respectively. Because the position of the trunk lid wiring harness fixed points on the first vehicle body plane is optimized, the redundant portion of the trunk lid wiring harness can be minimized throughout the entire trunk lid opening and closing movement, preventing interference and wear between the trunk lid wiring harness and the tailgate hinge mechanism, and reducing the risk of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] Figure 1 A flow chart of a method for designing wiring for a car trunk lid provided in an embodiment of the present application;

[0050] Figure 2 Another flow chart of the car trunk lid wiring design method provided in an embodiment of the present application;

[0051] Figure 3 Schematic diagram of the various opening and closing degrees of the car trunk lid provided in the embodiment of the present application;

[0052] Figure 4 A schematic diagram of a car trunk lid at a closed angle provided in an embodiment of the present application;

[0053] Figure 5 A schematic diagram of a car trunk lid at one-third of its opening angle provided in an embodiment of the present application;

[0054] Figure 6 A schematic diagram of a car trunk lid provided in an embodiment of the present application at a two-thirds opening angle;

[0055] Figure 7 A schematic diagram of a car trunk lid at its maximum opening angle provided in an embodiment of the present application;

[0056] Figure 8 A schematic diagram of the projection of the first preset point at various opening and closing angles of a car trunk provided in an embodiment of the present application;

[0057] Figure 9 A structural diagram of a car trunk lid wiring design device provided in an embodiment of the present application;

[0058] Figure 10 This is a flow chart of the method for arranging wiring for a car trunk lid provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0060] The embodiment of the present application provides a method for designing wiring of a car trunk lid. Figure 1 As shown, the method includes steps S101, S102, S103 and S104, wherein:

[0061] In step S101 , a three-dimensional model of a car is obtained.

[0062] In step S102, the first coordinates of a first preset point on the trunk lid curved beam and the second coordinates of a second preset point on the first vehicle body plane are obtained in the three-dimensional model, where the second coordinates are to-be-determined coordinates and the first vehicle body plane is the top surface of the trunk accommodating space.

[0063] In step S103 , the optimal coordinate value of the second coordinate is determined according to the first coordinate.

[0064] In step S104, the second preset point corresponding to the optimal coordinate value is used as the fixed point of the automobile trunk lid wiring harness on the first vehicle body plane, and the first preset point is used as the fixed point of the automobile trunk lid wiring harness on the trunk curved beam. The automobile trunk lid wiring harness is used to electrically connect the electrical connectors respectively set at the first preset point and the second preset point.

[0065] In some optional embodiments, determining the optimal coordinate value of the second coordinate according to the first coordinate includes:

[0066] A plurality of first coordinates of a first preset point on the trunk lid curved beam corresponding to each opening and closing angle of the trunk lid are obtained.

[0067] The plurality of first coordinates are projected onto the first vehicle body plane to obtain a plurality of projected coordinates.

[0068] A distance formula group is established to represent a plurality of connection distances corresponding one to one between the second coordinate and the plurality of projection coordinates, wherein known coefficients in the distance formula group are the plurality of projection coordinates, the independent variable is the second coordinate, and the dependent variable is the plurality of connection distances.

[0069] The distance formula group is solved to obtain the coordinate value of the second coordinate corresponding to the minimum difference between the multiple connection distances, which is used as the optimal coordinate value.

[0070] In some optional embodiments, the multiple opening and closing angles include a closed angle, an opening one-third angle, an opening two-thirds angle, and a maximum opening angle.

[0071] In some optional embodiments, setting a second preset point on the first vehicle body plane includes:

[0072] A second preset point is set within a first range of the first vehicle body plane, and the first range does not coincide with the central cross section of the vehicle body.

[0073] In some optional embodiments, setting a second preset point on the first vehicle body plane includes:

[0074] A first range is selected on a first vehicle body plane.

[0075] The rotation axis of the trunk lid curved beam is projected onto the first vehicle body plane to obtain a projection line.

[0076] A second preset point is set on the first line segment where the projection line falls within the first range.

[0077] Using the automotive trunk lid routing design method provided in this application, the optimal coordinate value of the second coordinate of a second preset point on a first vehicle body plane is determined in a three-dimensional vehicle model based on the first coordinate of a first preset point fixed on a trunk lid curved beam. The first vehicle body plane is the top surface of the trunk storage space. After determining the optimal coordinate value of the second coordinate, the second preset point and the first preset point corresponding to the optimal coordinate value are used as fixed points for the trunk lid wiring harness on the first vehicle body plane and on the trunk curved beam, respectively. The trunk lid wiring harness is electrically connected to the electrical connectors provided at the first preset point and the second preset point, respectively. Because the position of the trunk lid wiring harness fixed points on the first vehicle body plane is optimized, the redundant portion of the trunk lid wiring harness can be minimized throughout the entire trunk lid opening and closing movement, preventing interference and wear between the trunk lid wiring harness and the tailgate hinge mechanism, and reducing the risk of failure.

[0078] The present application also provides a method for designing wiring harnesses for the trunk lid of a three-box vehicle. This method effectively solves the wiring harness layout problem for the trunk lid of a three-box vehicle and meets the requirements for the space required for the moving section during wiring harness design. The location and size of the wiring harness installation points can be designed based on the trunk lid opening angle and different spatial assembly environments of different projects. This design method allows for a quick and efficient wiring harness layout solution, while also effectively standardizing the corresponding wiring harness design process, guiding wiring harness design engineers in their design work, and providing a design approach for wiring harness industry engineers during development and design.

[0079] like Figure 2 As shown, the method includes steps S201, S202, S203, S204, S205, S206 and S207, wherein:

[0080] In step S201 , a three-dimensional model of a car is obtained.

[0081] It is understandable that a three-dimensional model of the car can be pre-established in software such as CAD or CATIA, and the three-dimensional model of the car can be obtained from the software such as CAD or CATIA.

[0082] In step S202, the first coordinates of a first preset point on the trunk lid curved beam and the second coordinates of a second preset point on the first vehicle body plane are obtained in the three-dimensional model, where the second coordinates are to-be-determined coordinates and the first vehicle body plane is the top surface of the trunk accommodating space.

[0083] In some optional embodiments, such as Figure 3As shown, the trunk lid has multiple opening and closing angles, including a closed angle shown at 301, a one-third opening angle shown at 302, a two-thirds opening angle shown at 303, and a maximum opening angle shown at 304. Taking a sedan as an example, the maximum opening angle can be 93°.

[0084] It is understood that when the trunk lid is at a closed angle (corresponding to Figure 3 301) in the case of Figure 4 As shown, the first coordinate of the first preset point 401 on the trunk lid curved beam and the second coordinate of the second preset point 402 on the first vehicle body plane are obtained in the three-dimensional model, the second coordinate is the to-be-determined coordinate, and the first vehicle body plane is the top surface of the trunk accommodating space. Figure 4 The middle curved beam is denoted by 403, the rotation axis of the curved beam is denoted by 404, and the wiring harness is denoted by 405. The rotation axis of the curved beam refers to the extension line of the rotational symmetry axis around which the curved beam of the trunk lid rotates.

[0085] When the trunk lid is at one-third of the opening angle (corresponding to Figure 3 302) in the case of Figure 5 As shown, the first coordinate of the first preset point 501 on the trunk lid curved beam and the second coordinate of the second preset point 502 on the first vehicle body plane are obtained in the three-dimensional model, the second coordinate is the to-be-determined coordinate, and the first vehicle body plane is the top surface of the trunk accommodating space. Figure 5 The middle curved beam is 503 , the rotation axis of the curved beam is 504 , and the wiring harness is 505 .

[0086] When the trunk lid is at the two-thirds opening angle (corresponding to Figure 3 303) in the case of Figure 6 As shown, the first coordinate of the first preset point 601 on the trunk lid curved beam and the second coordinate of the second preset point 602 on the first vehicle body plane are obtained in the three-dimensional model, the second coordinate is the to-be-determined coordinate, and the first vehicle body plane is the top surface of the trunk accommodating space. Figure 6 The middle curved beam is 603 , the rotation axis of the curved beam is 604 , and the wiring harness is 605 .

[0087] When the trunk lid is at the maximum opening angle (corresponding to Figure 3 304) in the case of Figure 7 As shown, the first coordinate of the first preset point 701 on the trunk lid curved beam and the second coordinate of the second preset point 702 on the first vehicle body plane are obtained in the three-dimensional model, the second coordinate is the to-be-determined coordinate, and the first vehicle body plane is the top surface of the trunk accommodating space. Figure 7 The middle curved beam is 703 , the rotation axis of the curved beam is 704 , and the wiring harness is 705 .

[0088] Determine the optimal coordinate value of the second coordinate based on the first coordinate, and the process specifically includes:

[0089] In step S203 , a plurality of first coordinates of a first preset point on the trunk lid curved beam corresponding to each of a plurality of opening and closing angles of the trunk lid are acquired.

[0090] In step S204 , the plurality of first coordinates are projected onto the first vehicle body plane to obtain a plurality of projected coordinates.

[0091] It is understandable that if Figure 8 As shown, when the trunk lid is at a closed angle (corresponding to Figure 4 In the case shown in FIG. 8 , the corresponding first preset point can be represented in space by a first bending beam point 8011. The first coordinate of the first bending beam point 8011 is projected onto the first vehicle body plane 802 to obtain a first projection point 8011′. The coordinates of the first projection point 8011′ are the first projection coordinates. Figure 4 The second preset point 402 in Figure 8 803 is used to indicate this.

[0092] When the trunk lid is at one-third of the opening angle (corresponding to Figure 5 In the case shown in FIG. 8 , the corresponding first preset point can be represented in space by a second bending beam point 8012. The first coordinate of the second bending beam point 8012 is projected onto the first vehicle body plane 802 to obtain a second projection point 8012′. The coordinates of the second projection point 8012′ are the second projection coordinates. Figure 5 The second preset point 502 in Figure 8 803 is also used in the representation.

[0093] When the trunk lid is at the two-thirds opening angle (corresponding to Figure 6 In the case shown in FIG. 8 , the corresponding first preset point can be represented in space by a third bending beam point 8013. The first coordinate of the third bending beam point 8013 is projected onto the first vehicle body plane 802 to obtain a third projection point 8013′. The coordinates of the third projection point 8013′ are the third projection coordinates. Figure 6 The second preset point 602 in Figure 8 803 is also used in the representation.

[0094] When the trunk lid is at the maximum opening angle (corresponding to Figure 7 In the case shown in FIG. 8 , the corresponding first preset point can be represented in space by a fourth bending beam point 8014. The first coordinate of the fourth bending beam point 8014 is projected onto the first vehicle body plane 802 to obtain a fourth projection point 8014′. The coordinates of the fourth projection point 8014′ are the first projection coordinates. Figure 7 The second preset point 402 in Figure 8 803 is also used in the representation.

[0095] In step S205, a distance formula group is established to represent multiple connection distances corresponding one-to-one between the second coordinate and multiple projection coordinates, wherein the known coefficients in the distance formula group are multiple projection coordinates, the independent variable is the second coordinate, and the dependent variable is multiple connection distances.

[0096] like Figure 8 As shown, a distance formula group is established to represent the one-to-one correspondence between the second coordinate of 803 and the multiple projection coordinates of the first projection point 8011', the second projection point 8012', the third projection point 8013', and the fourth projection point 8014'. The known coefficients in the distance formula group are the multiple projection coordinates, the independent variable is the second coordinate, and the dependent variable is the multiple connection distances.

[0097] In step S206 , the distance formula group is solved to obtain the coordinate value of the second coordinate corresponding to when the difference between the multiple connection distances is minimum, which is used as the optimal coordinate value.

[0098] like Figure 8 As shown, when the trunk lid is at a closed angle, the theoretical size of the wiring harness required is Y1; when the trunk lid is at one-third of the opening angle, the theoretical size of the wiring harness required is Y2; when the trunk lid is at two-thirds of the opening angle, the theoretical size of the wiring harness required is Y3; when the trunk lid is at the maximum opening angle, the theoretical size of the wiring harness required is Y4. The differences between Y1, Y2, Y3 and Y4 will exist under the trunk rack in the form of wiring harness margin.

[0099] At this time, theoretically, when the second preset point 803 where the harness is fixed on the vehicle body makes Y1=Y2=Y3=Y4, the harness layout is optimal. However, due to the influence of the bending beam and the hinge installation structure, it is actually necessary to make the difference between Y1, Y2, Y3, and Y4 as small as possible according to the actual vehicle conditions, until a second preset point 803 that meets all the layout conditions is found.

[0100] In step S207, the second preset point corresponding to the optimal coordinate value is used as the fixed point of the automobile trunk lid wiring harness on the first vehicle body plane, and the first preset point is used as the fixed point of the automobile trunk lid wiring harness on the trunk curved beam. The automobile trunk lid wiring harness is used to electrically connect the electrical connectors respectively set at the first preset point and the second preset point.

[0101] It is understandable that, in the process of solving the distance formula group and obtaining the coordinate value of the second coordinate corresponding to the minimum difference between the multiple connection distances as the optimal coordinate value, the second preset point corresponding to the second coordinate needs to have a value range to ensure the rationality of the assembly position, improve the efficiency of solving the distance formula group, and reduce the amount of calculation. Therefore:

[0102] In some optional embodiments, setting a second preset point on the first vehicle body plane includes:

[0103] A second preset point is set within a first range of the first vehicle body plane, and the first range does not coincide with the central cross section of the vehicle body.

[0104] In some optional embodiments, setting a second preset point on the first vehicle body plane includes:

[0105] A first range is selected on a first vehicle body plane.

[0106] The rotation axis of the trunk lid curved beam is projected onto the first vehicle body plane to obtain a projection line; the rotation axis of the trunk lid curved beam refers to the extension line of the rotational symmetry axis around which the trunk lid curved beam rotates, such as Figure 8 As shown, the rotation axis of the trunk lid bending beam is indicated by 804.

[0107] A second preset point is set on the first line segment where the projection line falls within the first range.

[0108] Figure 8 In the entire movement process of opening and closing the trunk lid, the envelope corresponding to the motion envelope of the first preset point fixed on the trunk lid curved beam is represented by envelope 805.

[0109] Using the automotive trunk lid routing design method provided in this application, the optimal coordinate value of the second coordinate of a second preset point on a first vehicle body plane is determined in a three-dimensional vehicle model based on the first coordinate of a first preset point fixed on a trunk lid curved beam. The first vehicle body plane is the top surface of the trunk storage space. After determining the optimal coordinate value of the second coordinate, the second preset point and the first preset point corresponding to the optimal coordinate value are used as fixed points for the trunk lid wiring harness on the first vehicle body plane and on the trunk curved beam, respectively. The trunk lid wiring harness is electrically connected to the electrical connectors provided at the first preset point and the second preset point, respectively. Because the position of the trunk lid wiring harness fixed points on the first vehicle body plane is optimized, the redundant portion of the trunk lid wiring harness can be minimized throughout the entire trunk lid opening and closing movement, preventing interference and wear between the trunk lid wiring harness and the tailgate hinge mechanism, and reducing the risk of failure.

[0110] The embodiment of the present application also provides a car trunk lid wiring design device, such as Figure 9 As shown, the car trunk lid wiring design device 90 includes a processor 901, a memory 902, and a computer program stored in the memory 902 and executable on the processor 901. The computer program is characterized in that when executed by the processor 901, the following steps are implemented:

[0111] Get the 3D model of the car.

[0112] In the three-dimensional model, the first coordinate of a first preset point on the trunk lid curved beam and the second coordinate of a second preset point on the first vehicle body plane are obtained, where the second coordinate is an undetermined coordinate and the first vehicle body plane is the top surface of the trunk accommodating space.

[0113] An optimal coordinate value of the second coordinate is determined based on the first coordinate.

[0114] The second preset point corresponding to the optimal coordinate value is used as the fixing point of the automobile trunk lid wiring harness on the first vehicle body plane, and the first preset point is used as the fixing point of the automobile trunk lid wiring harness on the trunk curved beam. The automobile trunk lid wiring harness is used to electrically connect the electrical connectors respectively set at the first preset point and the second preset point.

[0115] Optionally, determining the optimal coordinate value of the second coordinate according to the first coordinate includes:

[0116] A plurality of first coordinates of a first preset point on the trunk lid curved beam corresponding to each opening and closing angle of the trunk lid are obtained.

[0117] The plurality of first coordinates are projected onto the first vehicle body plane to obtain a plurality of projected coordinates.

[0118] A distance formula group is established to represent a plurality of connection distances corresponding one to one between the second coordinate and the plurality of projection coordinates, wherein known coefficients in the distance formula group are the plurality of projection coordinates, the independent variable is the second coordinate, and the dependent variable is the plurality of connection distances.

[0119] The distance formula group is solved to obtain the coordinate value of the second coordinate corresponding to the minimum difference between the multiple connection distances, which is used as the optimal coordinate value.

[0120] Optionally, the plurality of opening and closing angles include a closing angle, an opening one-third angle, an opening two-thirds angle and a maximum opening angle.

[0121] Optionally, setting a second preset point on the first vehicle body plane includes:

[0122] A first range is selected on a first vehicle body plane.

[0123] The rotation axis of the trunk lid curved beam is projected onto the first vehicle body plane to obtain a projection line.

[0124] A second preset point is set on the first line segment where the projection line falls within the first range.

[0125] Using the vehicle trunk lid routing design device provided in this application, the optimal coordinate value of the second coordinate of a second preset point on a first vehicle body plane is determined in a three-dimensional vehicle model based on the first coordinate of a first preset point fixed on a trunk lid curved beam. The first vehicle body plane is the top surface of the trunk storage space. After determining the optimal coordinate value of the second coordinate, the second preset point and the first preset point corresponding to the optimal coordinate value are used as fixed points of the vehicle trunk lid wiring harness on the first vehicle body plane and on the trunk curved beam, respectively. The vehicle trunk lid wiring harness is electrically connected to the electrical connectors provided at the first preset point and the second preset point, respectively. Because the position of the fixed point of the vehicle trunk lid wiring harness on the first vehicle body plane is optimized, the redundant portion of the vehicle trunk lid wiring harness can be minimized throughout the entire movement of the vehicle trunk lid opening and closing, avoiding interference and wear between the vehicle trunk lid wiring harness and the tailgate hinge mechanism, and reducing the risk of failure.

[0126] The embodiment of the present application also provides a method for arranging wiring of a car trunk lid, such as Figure 10 As shown, the method includes steps S1001, S1002, S1003 and S1004, wherein:

[0127] In step S1001, the first preset point and the second preset point are determined using the automobile trunk lid routing design method provided in the aforementioned embodiment.

[0128] In step S1002, a first connector is arranged at a first preset point, and the first connector is electrically connected to an electrical appliance arranged on the trunk lid.

[0129] In step S1003, a second connector is arranged at a second preset point, and the second connector is electrically connected to the vehicle electronic control unit and the power supply unit.

[0130] In step S1004, the first connector and the second connector are connected by using a trunk lid wiring harness, and a first section of the trunk lid wiring harness close to the first connector is fixed to the trunk lid curved beam, and the section other than the first section is suspended in the air.

[0131] It is understood that once the positions of the first and second preset points are determined, those skilled in the art will be able to understand how to select the length and path of the trunk lid wiring harness connecting the first and second preset points to minimize wiring redundancy while ensuring wiring harness reliability. Regarding the wiring harness path, the first segment of the trunk lid wiring harness near the first connector can be fixed to the trunk lid curved beam, with the remaining portion excluding the first segment suspended in the air. Regarding the wiring harness length, while maintaining the aforementioned wiring harness path arrangement, wiring redundancy in the suspended portion can be minimized, while also preventing the wiring harness from bearing excessive tensile forces or the suspended portion from excessively occupying trunk space.

[0132] Using the vehicle trunk lid wiring layout method provided in this application, after determining the optimal position of a second preset point on a first vehicle body plane, the second preset point at the optimal position and the first preset point on the trunk lid curved beam are used as fixing points for the vehicle trunk lid wiring harness on the first vehicle body plane and the trunk curved beam, respectively. The trunk lid wiring harness is then arranged so that the trunk lid wiring harness is electrically connected to the electrical connectors provided at the first preset point and the second preset point, respectively. Because the positions of the trunk lid wiring harness fixing points on the first vehicle body plane are optimized, redundant portions of the trunk lid wiring harness are minimized throughout the entire trunk lid opening and closing motion, preventing interference and wear between the trunk lid wiring harness and the tailgate hinge mechanism, thereby reducing the risk of failure.

[0133] The present application also provides a computer-readable storage medium, such as a memory device including program code. The program code can be executed by a processor of a vehicle trunk lid routing design device to implement the vehicle trunk lid routing design method described in the above embodiment. For example, the computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a compact disc (CD-ROM), a magnetic tape, a floppy disk, or an optical data storage device.

[0134] Those skilled in the art will understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or by hardware related to program code, and the program can be stored in a computer-readable storage medium. The above-mentioned storage medium can be a read-only memory, a disk or an optical disk, etc.

[0135] In this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0136] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0137] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

[0138] The above description is only for the purpose of facilitating those skilled in the art to understand the technical solution of this application and is not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A method for designing wiring for a car trunk lid, characterized in that: The method comprises: Get the 3D model of the car; Obtaining, in the three-dimensional model, first coordinates of a first preset point on the trunk lid curved beam and second coordinates of a second preset point on a first vehicle body plane, where the second coordinates are undetermined coordinates and the first vehicle body plane is the top surface of the trunk accommodating space; determining an optimal coordinate value of the second coordinate according to the first coordinate; The second preset point corresponding to the optimal coordinate value is used as the fixing point of the automobile trunk lid wiring harness on the first vehicle body plane, and the first preset point is used as the fixing point of the automobile trunk lid wiring harness on the trunk bending beam. The automobile trunk lid wiring harness is used to electrically connect the electrical connectors respectively set at the first preset point and the second preset point.

2. The method for designing wiring for a car trunk lid according to claim 1, wherein: Determining the optimal coordinate value of the second coordinate according to the first coordinate includes: Acquire a plurality of first coordinates of a first preset point on the trunk lid curved beam corresponding to each of a plurality of opening and closing angles of the trunk lid; Projecting the plurality of first coordinates onto the first vehicle body plane to obtain a plurality of projected coordinates; Establishing a distance formula group representing a plurality of connection distances corresponding one-to-one between the second coordinate and the plurality of projected coordinates, wherein known coefficients in the distance formula group are the plurality of projected coordinates, an independent variable is the second coordinate, and a dependent variable is the plurality of connection distances; The distance formula group is solved to obtain the coordinate value of the second coordinate corresponding to when the difference between the multiple connection distances is minimum, which is used as the optimal coordinate value.

3. The method for designing wiring for a car trunk lid according to claim 2, wherein: The multiple opening and closing angles include a closing angle, an opening one-third angle, an opening two-thirds angle and a maximum opening angle.

4. The method for designing wiring for a car trunk lid according to claim 1, wherein: The step of setting a second preset point on the first vehicle body plane includes: A second preset point is set within a first range of the first vehicle body plane, and the first range does not coincide with the central cross section of the vehicle body.

5. The method for designing wiring for a car trunk lid according to claim 1, wherein: The step of setting a second preset point on the first vehicle body plane includes: Selecting the first range on the first vehicle body plane; Projecting the rotation axis of the trunk lid curved beam onto the first vehicle body plane to obtain a projection line; A second preset point is set on a first line segment where the projection line falls within the first range.

6. A method for arranging wiring for a car trunk lid, characterized in that: The method comprises: Determine the first preset point and the second preset point using the automobile trunk lid routing design method according to claims 1-5; Arranging a first connector at the first preset point, the first connector being electrically connected to an electrical appliance arranged on the trunk lid; Arranging a second connector at the second preset point, wherein the second connector is electrically connected to the vehicle electronic control unit and the power supply unit; The first connector and the second connector are connected by a trunk lid wiring harness, a first section of the trunk lid wiring harness close to the first connector is fixed to the trunk lid curved beam, and the part other than the first section is suspended in the air.

7. A car trunk lid wiring design device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is executed by the processor, it realizes: Get the 3D model of the car; Obtaining, in the three-dimensional model, first coordinates of a first preset point on the trunk lid curved beam and second coordinates of a second preset point on a first vehicle body plane, where the second coordinates are undetermined coordinates and the first vehicle body plane is the top surface of the trunk accommodating space; determining an optimal coordinate value of the second coordinate according to the first coordinate; The second preset point corresponding to the optimal coordinate value is used as the fixing point of the automobile trunk lid wiring harness on the first vehicle body plane, and the first preset point is used as the fixing point of the automobile trunk lid wiring harness on the trunk bending beam. The automobile trunk lid wiring harness is used to electrically connect the electrical connectors respectively set at the first preset point and the second preset point.

8. The car trunk lid wiring design device according to claim 7, characterized in that: Determining the optimal coordinate value of the second coordinate according to the first coordinate includes: Acquire a plurality of first coordinates of a first preset point on the trunk lid curved beam corresponding to each of a plurality of opening and closing angles of the trunk lid; Projecting the plurality of first coordinates onto the first vehicle body plane to obtain a plurality of projected coordinates; Establishing a distance formula group representing a plurality of connection distances corresponding one-to-one between the second coordinate and the plurality of projected coordinates, wherein known coefficients in the distance formula group are the plurality of projected coordinates, an independent variable is the second coordinate, and a dependent variable is the plurality of connection distances; The distance formula group is solved to obtain the coordinate value of the second coordinate corresponding to when the difference between the multiple connection distances is minimum, which is used as the optimal coordinate value.

9. The car trunk lid wiring design device according to claim 8, characterized in that: The multiple opening and closing angles include a closing angle, an opening one-third angle, an opening two-thirds angle and a maximum opening angle.

10. The car trunk lid wiring design device according to claim 7, characterized in that: The step of setting a second preset point on the first vehicle body plane includes: Selecting the first range on the first vehicle body plane; Projecting the rotation axis of the trunk lid curved beam onto the first vehicle body plane to obtain a projection line; A second preset point is set on a first line segment where the projection line falls within the first range.

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