Vehicle and auxiliary frame thereof
Through laser welding technology and poor thick plate design, the weight increase caused by frame splicing is solved, and the frame lightweight and production efficiency are improved.
Patent Information
- Application Number
- CN202422424694.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In the prior art, the frame blank splicing method results in unnecessary weight increase, which deviates from the purpose of lightening the frame.
Laser welding technology is used to cross splice multiple splicing bodies in the first and second directions to form cross-split lines to avoid overlapping parts, combine different thick plates and special shape designs, and achieve fixed connections through one-time stamping molding.
While ensuring strength, the weight of the frame is reduced, the material utilization and production efficiency are improved, and the material cost is reduced.
Smart Images
Figure CN223086106U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of frame forming, and particularly relates to a vehicle and its subframe. Background Art
[0002] As an important structure for a vehicle to carry loads, the frame often has high requirements for frame strength. At the same time, due to economic requirements, it is often desired to achieve the light weight of the frame.
[0003] In the related art, the frame is often formed by stamping multiple blanks and then welding them together, so that the frame has a hollow structure, thereby ensuring the strength of the frame while reducing the weight of the frame.
[0004] However, in the related art, the splicing method between blanks often causes unnecessary weight increase, thus deviating from the purpose of frame light weight. Utility Model Content
[0005] The embodiments of this application provide a vehicle and its subframe to solve the unnecessary weight increase caused during blank splicing, so as to at least partially solve the above technical problems.
[0006] To achieve the above object, according to the first aspect of this application, a subframe is provided, including: a frame body, including a plurality of spliced bodies fixedly connected; wherein, two adjacent spliced bodies are spliced in a first direction and have a profile splicing line extending at least along a second direction; the first direction and the second direction intersect.
[0007] Optionally, in some embodiments of this application, two adjacent spliced bodies are embedded in each other.
[0008] Optionally, in some embodiments of this application, the profile splicing line includes: a straight line segment or a curve segment.
[0009] Optionally, in some embodiments of this application, the curve of the profile splicing line includes an arc curve.
[0010] Optionally, in some embodiments of this application, the shape formed by the straight line segments of the profile splicing line includes at least one of a trapezoid, a triangle, and a rectangle.
[0011] Optionally, in some embodiments of this application, at least part of the straight line segments is perpendicular to the first direction.
[0012] Optionally, in some embodiments of this application, at least part of the straight line segments is parallel to the second direction.
[0013] Optionally, in some embodiments of this application, the curve segment is arranged between two straight line segments.
[0014] Optionally, in some embodiments of the present application, the profile splicing line of two adjacent splicing bodies extends in the second direction.
[0015] Optionally, in some embodiments of the present application, the profile splicing line intersects obliquely or perpendicularly with the first direction; or, the profile splicing line intersects obliquely with the second direction.
[0016] Optionally, in some embodiments of the present application, the multiple fixedly connected splicing bodies include two splicing bodies with different materials.
[0017] Optionally, in some embodiments of the present application, the multiple fixedly connected splicing bodies include two splicing bodies with different maximum thicknesses.
[0018] Optionally, in some embodiments of the present application, the multiple fixedly connected splicing bodies include two splicing bodies with different minimum thicknesses.
[0019] Optionally, in some embodiments of the present application, the number of the splicing bodies in the frame body is greater than or equal to 3.
[0020] Optionally, in some embodiments of the present application, the splicing bodies in the frame body are all formed by one-time stamping.
[0021] Optionally, in some embodiments of the present application, the subframe includes two relatively arranged frame bodies.
[0022] Optionally, in some embodiments of the present application, the splicing bodies of one of the two relatively arranged frame bodies are correspondingly arranged with the splicing bodies of the other frame body.
[0023] Optionally, in some embodiments of the present application, the frame body is divided into:
[0024] A crossbeam area for forming the crossbeam of the subframe;
[0025] A longitudinal beam area for forming the longitudinal beam of the subframe;
[0026] Wherein, at least one of the crossbeam area and the longitudinal beam area includes multiple splicing bodies.
[0027] Optionally, in some embodiments of the present application, one splicing body at least constitutes at least a part of the crossbeam area or the longitudinal beam area.
[0028] Optionally, in some embodiments of the present application, the crossbeam area is formed by one splicing body.
[0029] Optionally, in some embodiments of the present application, the plurality of fixedly connected spliced bodies include at least two different spliced bodies; the subframe further includes: a suspension mounting structure, a hanging mounting structure and a body mounting structure;
[0030] Wherein, the suspension mounting structure, the hanging mounting structure and the vehicle body mounting structure are all mounted to the frame; at least two of the suspension mounting structure, the hanging mounting structure and the vehicle body mounting structure are fixedly connected to two different splicing bodies.
[0031] Optionally, in some embodiments of the present application, the plurality of fixedly connected spliced bodies include at least two spliced bodies fixedly connected by welding.
[0032] According to a second aspect of the present application, a vehicle is also provided, comprising the aforementioned subframe.
[0033] The beneficial effect of the present application is that the extra weight of the splicing body brought by the splicing body for achieving fixed connection is reduced by improving the splicing method of the splicing body.
[0034] More specifically, some embodiments of the present application may produce the following specific beneficial effects:
[0035] The internal overlap of the spliced body can ensure both the strength of the fixed connection and the effect of reducing the weight.
[0036] By adopting the scheme of integrally stamping the spliced body, the production efficiency can be highly improved;
[0037] Through the combination of the splicing bodies, the thickness, material, etc. of the splicing bodies can be configured in a targeted manner according to the specific needs of each area, thereby achieving targeted reinforcement of the frame.
[0038] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] 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, and those skilled in the art can obtain other drawings based on these drawings without creative work.
[0040] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.
[0041] Figure 1 is a schematic diagram of the overall structure of a subframe provided in an exemplary embodiment of the present application;
[0042] Figure 2 It is a schematic structural diagram of the upper plate provided in the exemplary embodiment of the present application;
[0043] Figure 3 It is a top view structural diagram of the upper plate provided in the exemplary embodiment of the present application;
[0044] Figure 4 It is a schematic structural diagram of laser splicing between the upper plate and the lower plate provided in the exemplary embodiment of the present application;
[0045] Figure 5 It is a schematic lap joint structural diagram of conventional gas shielded welding between the upper plate and the lower plate in the related art;
[0046] Figure 6 It is a partial top view structural diagram of the upper plate provided in the exemplary embodiment of the present application;
[0047] Figure 7 It is a schematic cross-sectional structural diagram of the upper plate provided in the exemplary embodiment of the present application;
[0048] Figure 8 It is a schematic diagram of the first blank partition of the upper plate provided in the exemplary embodiment of the present application;
[0049] Figure 9 It is a schematic diagram of the second blank partition of the upper plate provided in the exemplary embodiment of the present application;
[0050] Figure 10 It is a schematic diagram of the first way of the welding line between the splicing areas provided in the exemplary embodiment of the present application;
[0051] Figure 11 It is a schematic diagram of the second way of the welding line between the splicing areas provided in the exemplary embodiment of the present application;
[0052] Figure 12 It is a schematic diagram of the third way of the welding line between the splicing areas provided in the exemplary embodiment of the present application;
[0053] Figure 13 It is a schematic diagram of the first welding method between the upper plate and the lower plate provided in the exemplary embodiment of the present application;
[0054] Figure 14 It is a schematic diagram of the second welding method between the upper plate and the lower plate provided in the exemplary embodiment of the present application
[0055] Figure 15 It is a schematic diagram of the thickness distribution of the subframe plate provided in the exemplary embodiment of the present application;
[0056] Figure 16 is Figure 15 A schematic diagram of the first partial area in the subframe shown;
[0057] Figure 17 is Figure 16 A schematic diagram of the B-B cross-section in;
[0058] Figure 18 is Figure 15 A schematic diagram of the second partial area in the subframe shown;
[0059] Figure 19 is Figure 18 A schematic diagram of the C-C cross-section in;
[0060] Figure 20 Another schematic diagram of the subframe provided in the exemplary embodiment of the present application;
[0061] Figure 21 A schematic diagram of a partial area in the subframe shown in 20;
[0062] Figure 22 is Figure 21 A schematic diagram of the D-D cross-section in;
[0063] Figure 23 A schematic diagram of the vehicle provided in the exemplary embodiment of the present application.
[0064] Explanation of reference numerals:
[0065] 1, vehicle; 10, subframe; 100, upper plate; 101, splicing body; 102, mounting structure for suspension; 103, mounting structure for suspension; 104, mounting structure for vehicle body; 105, profile splicing line; 200, lower plate; 20, space between plates; D1, first direction; D2, second direction. Detailed implementation manners
[0066] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.
[0067] Referring to Figures 1 to 22 shown, the present application provides a subframe 10, including: an upper plate 100 and a lower plate 200. The upper plate 100 can be used as one frame body in the present application; and the lower plate 200 can be used as another frame body in the present application.
[0068] Specifically, the subframe 10 includes an upper plate 100 disposed on the relatively upper side and a lower plate 200 disposed on the relatively lower side, where the relatively upper side and the relatively lower side are used to schematically describe the relative positional relationship between the upper plate 100 and the lower plate 200, rather than limiting the specific positions of the two themselves. The upper plate 100 and the lower plate 200 are butted together to form a subframe 10.
[0069] Referring to Figure 4 , Figure 10 and Figure 11 As shown, the upper plate 100, as a frame body, includes a plurality of spliced bodies 101 fixedly connected; among them, two adjacent spliced bodies 101 are spliced in the first direction D1 and have a profile splicing line 105 extending at least along the second direction D2. Specifically, the profile splicing line 105 extends at least along the second direction D2 in the profile where the first direction D1 and the second direction D2 are located, and the first direction D1 and the second direction D2 intersect.
[0070] In this way, it can avoid Figure 5 In the solution shown, there are overlapping parts in the first direction D1, thus increasing unnecessary weight.
[0071] Referring to Figure 4 As shown, as a specific solution, two adjacent spliced bodies 101 only have a profile splicing line 105 extending along the second direction D2. That is, two adjacent spliced bodies 101 are directly butted with straight ends. More specifically, among them, the profile splicing line 105 intersects the first direction D1 obliquely or vertically; the profile splicing line 105 intersects the second direction D2 obliquely.
[0072] Referring to Figure 10 and Figure 11 As shown, as a specific solution, two adjacent spliced bodies 101 are overlapped and arranged inside in the first direction D1.
[0073] Different from Figure 5 In the solution shown, the overlapping structures of the two spliced bodies 101 in the first direction D1 are all arranged inside in the second direction D2, which does not increase the thickness stacking at the butt joint and the mass corresponding to this part, thus reducing the use of the blank while ensuring the strength.
[0074] More specifically, referring to Figure 10 and Figure 11 As shown, the profile splicing line 105 includes: a straight line segment or a curved line segment.
[0075] In some embodiments of the present application, among them, the curve of the profile splicing line 105 includes an arc curve.
[0076] In some embodiments of the present application, the shape formed by the straight-line segments of the profile splicing line 105 includes at least one of a trapezoid, a triangle, and a rectangle.
[0077] In some embodiments of the present application, at least some of the straight-line segments are perpendicular to the first direction D1.
[0078] In some embodiments of the present application, at least some of the straight-line segments are parallel to the second direction D2.
[0079] In some embodiments of the present application, the curved segment is disposed between two straight-line segments.
[0080] Referring to Figure 4 , Figure 10 and Figure 11 As shown, the upper plate 100 is a frame body, which includes a plurality of spliced bodies fixedly connected; wherein, two adjacent spliced bodies are spliced in the first direction and have a profile splicing line 105 extending at least along the second direction, and the first direction and the second direction intersect.
[0081] In this way, it can avoid Figure 5 in the solution shown in , there is a part that overlaps in the first direction, thus increasing unnecessary weight.
[0082] Referring to Figure 4 As shown, as a specific solution, two adjacent spliced bodies only have a profile splicing line extending along the second direction. That is, two adjacent spliced bodies are directly butted with straight ends. More specifically, the profile splicing line intersects the first direction or the second direction obliquely or perpendicularly.
[0083] Referring to Figure 10 and Figure 11 As shown, as a specific solution, two adjacent spliced bodies are overlapped inside in the first direction.
[0084] Different from Figure 5 the solution shown in , the overlapping structures of the two spliced bodies in the first direction are all arranged inside in the second direction, so that the thickness stacking at the butting part and the mass corresponding to this part are not increased, thereby reducing the use of the blank while ensuring the strength.
[0085] More specifically, referring to Figure 10 and Figure 11 As shown, the profile splicing line includes: a straight-line segment or a curved segment.
[0086] In some embodiments of the present application, the curve of the profile splicing line includes an arc curve.
[0087] In some embodiments of the present application, the shape formed by the straight-line segments of the profile splicing line includes at least one of a trapezoid, a triangle, and a rectangle.
[0088] In some embodiments of the present application, at least part of the straight line segments are perpendicular to the first direction.
[0089] In some embodiments of the present application, at least part of the straight line segments are parallel to the second direction.
[0090] In some embodiments of the present application, the curved line segments are disposed between two straight line segments.
[0091] Wherein, with reference to Figures 2 to 9 as shown, the upper plate 100 or the lower plate 200 has a plurality of splicing bodies 101; the following will schematically illustrate the setting of a plurality of splicing bodies on the upper plate.
[0092] Laser welding is used to form a fixed connection between two splicing bodies 101. That is, at least a plurality of splicing bodies 101 are connected into a whole by laser welding.
[0093] With the above solution, laser splicing welding can effectively avoid the overlapping surfaces between different splicing bodies, thereby saving the materials at the overlapping positions. On the basis of reducing the material usage, the total weight of the frame can be improved, and at the same time, the dimensional error caused by welding springback can be avoided.
[0094] The upper plate 100 and the lower plate 200 are fixedly connected by welding. Of course, other welding methods can also be used to form a fixed connection.
[0095] In some embodiments, the number of the splicing bodies 101 is greater than or equal to 3. That is, the upper plate 100 or the lower plate 200 can be configured with corresponding numbers of splicing bodies 101 according to different partitioning methods.
[0096] For example, according to the connection positions with parts such as the vehicle suspension, body, and suspension, different connection positions are arranged on different splicing bodies to reasonably layout the connection relationship between the subframe and other parts of the vehicle, and it is also convenient to independently configure parameters such as the material and thickness of the corresponding splicing body 101 according to the structural strength required at the connection positions between the subframe and different parts of the vehicle to meet the usage requirements.
[0097] In some embodiments, different splicing bodies 101 have different materials. That is, for at least two different splicing bodies 101, the strength requirements of different regions of the subframe can be adapted through the difference in the materials of the splicing bodies 101. For example, in the regions of the subframe that bear high loads during use (such as the installation positions of the suspension), materials with higher strength are configured, while in the regions that bear relatively low loads, materials with lower strength are configured to control the overall cost or weight of the subframe.
[0098] In some embodiments, the different splicing bodies 101 have different thicknesses. That is, for at least two different splicing bodies 101, the strength requirements of different regions of the subframe 10 can be met by the difference in the materials of the splicing bodies 101. For example, in the regions of the subframe 10 that bear high loads during use (such as the installation positions of the suspensions), splicing bodies 101 with larger thicknesses are configured, while in the regions that bear relatively lower loads, splicing bodies 101 with smaller thicknesses are configured to control the overall cost or weight of the subframe 10.
[0099] In some embodiments, the splicing bodies 101 of the upper plate 100 and the splicing bodies 101 of the lower plate 200 are correspondingly arranged so that the upper plate 100 and the lower plate 200 can be welded into a whole by laser tailor welding.
[0100] In some embodiments, according to different usage requirements, the splicing blanks forming the splicing bodies 101 have special-shaped or rectangular shapes. The present application does not limit the specific form of the splicing bodies. For example, on the basis that the splicing blanks have a rectangular cross-section as a whole, protrusions, grooves, etc. can be further formed on the rectangular cross-section so that the cross-section of the splicing blanks is a special-shaped shape different from the rectangular shape.
[0101] As Figures 2 to 4 shown, the upper plate 100 has a plurality of splicing bodies 101. The splicing bodies 101 are not welded by the lap joint Figure 5 shown, that is, the traditional carbon dioxide gas shielded welding is not used, but laser tailor welding is directly adopted to make the two splicing bodies 101 form a fixed connection.
[0102] During stamping, the blanks of the plurality of splicing bodies 101 are first spliced by laser tailor welding, and then the two splicing bodies 101 are formed in one step by the same stamping, that is, the blanks of the two splicing bodies 101 are made into two splicing bodies 101 by one stamping after welding.
[0103] In a specific implementation scheme, all the splicing bodies 101 of the upper plate 100 or the lower plate 200 are formed by one stamping, for example.
[0104] In some embodiments, the two splicing bodies formed by the same stamping have different maximum sheet thicknesses.
[0105] Referring to Figure 4 and Figure 5 shown, by adopting the above scheme, obviously, the use of materials is reduced because the lap joint area is reduced, the weight is reduced, and laser tailor welding can effectively ensure the dimensional requirements of the splicing. In this way, during the process of manufacturing the vehicle frame from the blank to the finished product, the amount of materials added to meet the use strength requirements can be reduced for the blank, and the material utilization rate of the blank is effectively improved. Moreover, on the premise of meeting the use strength requirements, the weight of the vehicle frame is effectively reduced, which is beneficial to realizing the lightweight of the vehicle frame.
[0106] Referring to Figure 6 and Figure 7 As shown, at least one splicing body 101 in the upper plate 100 is a variable-thickness plate. That is, the thickness design can also be carried out inside one splicing body 101, so that it thickens at the required place to ensure strength, while adopting a thinner structure in the remaining parts to reduce weight.
[0107] Of course, only some of the splicing bodies 101 in the upper plate 100 can also adopt the scheme of welding the blanks into one body and then forming them by one-time stamping. The other part of the splicing bodies 101 can be spliced by the method of welding after forming.
[0108] Referring to Figure 8 As shown, the blank of the splicing body 101 can be a regular rectangle, so as to save the blanking process for each area. Or, two splicing bodies 101 made by the same stamping have different minimum plate thicknesses. Or, two said splicing bodies 101 made by the same stamping have different plate thicknesses at the welding joints. Of course, the above three situations can also be combined.
[0109] Referring to Figure 9 As shown, the blank of the splicing body 101 can be a special-shaped shape that relatively conforms to the shape of the splicing body 101 after forming, as long as it is ensured that the straight-line laser welding can be adopted at the splicing place.
[0110] As a specific scheme, all the splicing bodies 101 in the upper plate 100 can be formed into the splicing bodies 101 by one-time stamping after welding the blanks into a whole. As an alternative scheme, stamping can also be carried out in batches, so that only a part of the blanks are formed into the splicing bodies 101 each time.
[0111] Referring to Figures 10 to 12 As shown, in some embodiments, the end faces of two splicing bodies 101 abut against each other to form a profile splicing line 105; the profile splicing line 105 includes: a straight line or a curve.
[0112] In some embodiments, the end faces of two splicing bodies 101 form an embedding structure for one splicing body 101 to be embedded in the other splicing body 101. For example Figure 11 the trapezoidal embedding shown in Figure 12 and the arc-shaped embedding shown in. In this way, not only the strength of the splicing body can be maintained, but also the welding area can be reduced, and the area of the heat-affected zone can be reduced.
[0113] That is, two adjacent splicing bodies 101 are embedded in each other.
[0114] Referring to Figure 13 and Figure 14As shown, in some embodiments, the subframe 10 is provided with two oppositely arranged upper plates 100 and lower plates 200; the upper plate 100 and the lower plate 200 are fixedly connected by welding. In some embodiments, a space 20 is formed between the upper plate 100 and the lower plate 200. The welding between the upper plate 100 and the lower plate 200 can be Figure 13 the laser tailor welding shown, or gas shielded welding with a lap joint area can be used.
[0115] Referring to Figures 1 to 14 As shown, in some embodiments, the two spliced bodies 101 of the laser tailor welding in the upper plate 100 have different maximum sheet thicknesses. The two spliced bodies 101 of the laser tailor welding in the upper plate 100 have different minimum sheet thicknesses. The two spliced bodies 101 of the laser tailor welding in the upper plate 100 have different sheet thicknesses at the laser tailor welding.
[0116] Referring to Figure 7 As shown, one spliced body 101 can adopt a continuous thickness change, which is convenient for stamping and forming.
[0117] Referring to Figures 1 to 14 As shown, the entire subframe 10 can be divided into eight regions (corresponding to eight spliced bodies 101) according to the force, fatigue durability and assembly requirements of the subframe 10. Each region is set with different material thicknesses and materials of different strengths according to requirements. The blanks of each region are connected into a whole by laser tailor welding.
[0118] Referring to Figures 1 to 14 As shown, in some embodiments, the upper plate 100 includes: a crossbeam region and a longitudinal beam region. The crossbeam region is used to form the crossbeam of the subframe 10; the longitudinal beam region is used to form the longitudinal beam of the subframe 10; wherein, at least one of the crossbeam region and the longitudinal beam region of the upper plate 100 is composed of two spliced bodies 101 of laser tailor welding. At least one spliced body 101 in the upper plate 100 is fixedly connected to both the spliced body 101 in the crossbeam region and the spliced body 101 in the longitudinal beam region. The crossbeam region of the upper plate 100 is only composed of one spliced body 101.
[0119] In some embodiments, wherein, at least one of the crossbeam region and the longitudinal beam region of the upper plate 100 is made of two spliced bodies 101 formed by the same stamping. At least one of the spliced bodies 101 is formed by the same stamping as the spliced body 101 in the crossbeam region and the spliced body 101 in the longitudinal beam region.
[0120] Specifically, one spliced body forms at least a part of at least the crossbeam region or the longitudinal beam region.
[0121] Referring to Figures 1 to 14As shown, in some embodiments, the multiple fixedly connected splicing bodies include at least two different splicing bodies; the subframe 10 further includes: a suspension mounting structure 102, a suspension mounting structure 103, and a body mounting structure 104.
[0122] At least two of the suspension mounting structure 102, the suspension mounting structure 103, and the body mounting structure 104 are fixedly connected to two different splicing bodies 101 in an upper plate 100. As a specific solution, the suspension mounting structure 102 is set as a suspension bracket, the suspension mounting structure 103 is set as a swing arm mounting nut, and the body mounting structure 104 is set as a bushing or a mounting sleeve, etc.
[0123] In some embodiments, at least two different splicing bodies are splicing bodies of at least two different materials, and at least two splicing bodies 101 in the upper plate 100 are made of different materials. In particular, two splicing bodies 101 formed by the same stamping are made of different materials. For example, one splicing body 101 is made of a material with relatively high strength, and the other splicing body 101 is made of a material with relatively low strength. Thus, the splicing body 101 of the higher-strength material can be used to connect and install vehicle components, and the splicing body 101 of the lower-strength material can reduce the overall cost of the frame. Of course, in other embodiments, at least two different splicing bodies can also be at least two splicing bodies with different thicknesses, etc.
[0124] In some embodiments, the multiple fixedly connected splicing bodies include at least two splicing bodies fixedly connected by welding.
[0125] Based on the technical solution of the present application, when designing the subframe 10, by optimizing the assembly conditions of each installation point, the overall surface of the subframe 10 sheet metal can be made as smooth and continuous as possible. Furthermore, the main body of the subframe 10 can be designed into two parts, an upper plate and a lower plate. In this way, the upper plate / lower plate can be formed by one stamping of a single sheet of material, which can effectively improve production efficiency; among them, in order to effectively reduce the weight of the subframe 10 and reduce material costs, the upper plate / lower plate can be divided into multiple regions, and each region is set with different material thicknesses and materials according to strength requirements. High-strength plates can be used in regions with high strength requirements, and the material thickness can be appropriately set thicker. Ordinary plates can be used in regions with low strength requirements, and the material thickness can be appropriately thinner. Each region is connected into a whole by welding. The material blank is composed of multiple small pieces with different material thicknesses and different materials, which can greatly improve the material utilization rate and reduce material costs; secondly, in order to further reduce the weight of the subframe 10 sheet metal, differential thickness plates can be used in each region. The differential thickness plates are set thicker at positions with installation requirements and thinner at places without requirements, making full use of the weight reduction advantage of the differential thickness plate material to further reduce the weight of the subframe 10 and reduce the material usage cost.
[0126] Based on the inventive concept of the present application, a specific implementation of the subframe 10 is provided below as an exemplary illustration of the inventive concept of the present application.
[0127] Referring to Figures 15 to 19 as shown, in the Figure 15 subframe 10 shown, the subframe 10 can be divided into several different regions, corresponding to multiple splicing bodies 100 that form the subframe 10 in the subframe, namely the first high-strength thick plate region A1, the first high-strength thin plate region A2, the low-strength thin plate region A3, the second high-strength thin plate region A4, the second high-strength thick plate region A5, the first thick plate region A6, and the second thick plate region A7. For the convenience of clear illustration, the relative positions of each plate region are indicated by the depth of the line color in the attached drawings. And, for the convenience of explanation, in the Figure 15 example perspective, the upward direction is defined as the front end, and the downward direction is defined as the rear end. It can be understood that the descriptions of "front end" and "rear end" in the present application should be regarded as an exemplary illustration of the relative positions of each part structure in the subframe 10, rather than a limitation on the structures of the subframe 10 itself.
[0128] Among them, the first high-strength thick plate region A1 and the second high-strength thick plate region A5 can be provided with swing arm front mounting points for connecting to the vehicle swing arm. In order to better transmit the load and torque at the wheel end, referring to Figure 16 and Figure 17 , the first high-strength thick plate region A1 and the second high-strength thick plate region A5 are set as high-strength steel material plates with a relatively thick thickness (compared with each thin plate region). Specifically, a relatively thick plate thickness can be set at the position where the swing arm front mounting point is located, and the material thickness is thinned through the Tailor Rolled Blanks (TRB) technology at its front splicing position.
[0129] The first high-strength thin plate region A2 and the second high-strength thin plate region A4 can be provided with body mounting points for connecting to the vehicle body. In order to buffer and isolate the vibration and force of the powertrain and the wheels, referring to Figure 18 and Figure 19 , the first high-strength thin plate region A2 and the second high-strength thin plate region A4 are designed as relatively thin plates of high-strength materials (compared with each thick plate region). Specifically, the material thickness can be configured with a relatively thick plate thickness in the body mounting point area through the TRB technology, and a relatively thin plate thickness is configured in other areas. For example, the area of the first high-strength thin plate region A2 for connecting the rear end of the first high-strength thick plate region A1 is configured with a relatively thin plate thickness relative to the body mounting point area.
[0130] The low-strength thin plate area A3 is configured with the main function of bending resistance. This area can be configured with low strength or a relatively thin plate thickness, and its left and right ends are respectively connected to the first high-strength thin plate area A2 and the second high-strength thin plate area A4 through tailor welded blanks (TWB).
[0131] The installation methods of the stabilizer bar and the steering gear are designed as steel sleeve installation types. The installation points of the stabilizer bar and the steering gear are set in the first thick plate area A6, where the dynamic stiffness requirement is relatively high, and it is designed as a relatively thick plate structure.
[0132] The installation point of the powertrain mount is set in the second thick plate area A7, which is used to connect the powertrain mount. The second thick plate area A7 is an upper plate independent "bowl" - shaped structure, thereby improving the dynamic stiffness of the mount installation point.
[0133] Refer to Figures 20 to 22 as shown Figure 15 The partition of the subframe 10 shown is just one of the schemes. For example, the partition of the subframe 10 shown in Figure 21 can also be adopted. Among them, A1' and A3' are respectively the left longitudinal beam partition and the right longitudinal beam partition, and both adopt TRB high-strength steel plates. A2' is the front crossbeam partition, which is a relatively thin plate. A4' is the rear crossbeam area, which is a relatively thick plate. Refer to Figure 21 and Figure 22 as shown, the schematic diagram of the TRB material thickness distribution in the A1' area. Through TRB, it is divided into four different thickness areas. For example, each relatively thick area A11' is configured to connect the vehicle body, swing arm, etc., and each relatively thin area A12' connects the remaining part or the remaining area of the subframe.
[0134] In some embodiments, the subframe 10 of the present application can be made of steel plates. Compared with the conventional scheme of using aluminum material to make the subframe to reduce the weight of the subframe, by reasonably configuring the thickness and material of each area of the subframe 10, while controlling the self - weight of the subframe 10, the manufacturing cost is relatively low.
[0135] Refer to Figure 23 as shown, the present application also provides a vehicle 1, including the aforementioned subframe 10.
[0136] From the above, it can be seen that the multiple fixedly connected splicing bodies of the present application include splicing bodies with different thickness areas.
[0137] Refer to Figure 4 and Figure 7 as shown, in some embodiments of the present application, two adjacent splicing bodies have different thicknesses at the docking part; the two ends of the splicing body in the first direction have different thicknesses.
[0138] Refer to Figure 7As shown, in some embodiments of the present application, the position of the maximum thickness of the splicing body is set between the two ends of the splicing body in the first direction.
[0139] Referring to Figure 17 and Figure 19 As shown, the splicing body has a transition region; the thickness value of the splicing body continuously changes in the transition region.
[0140] Referring to Figure 7 As shown, the splicing body has at least a first thickness, a second thickness, and a third thickness that increase in sequence; wherein, the thickness of the end of the splicing body in the first direction is greater than the minimum thickness of the splicing body and less than the maximum thickness of the splicing body.
[0141] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.
[0142] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.
[0143] The embodiments, implementation manners, and related technical features of the present application can be combined and replaced with each other without conflict.
[0144] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.
Claims
1. A subframe, characterized in that, Comprising: A frame body, comprising a plurality of spliced bodies fixedly connected; Wherein, two adjacent ones of the spliced bodies are spliced in a first direction and have a sectional splicing line extending at least along a second direction; the first direction and the second direction intersect.
2. The subframe according to claim 1, characterized in that Among them, Two adjacent ones of the spliced bodies are embedded in each other.
3. The subframe according to claim 2, characterized in that Among them, The sectional splicing line includes: a straight line segment or a curved line segment.
4. The subframe according to claim 3, characterized in that Among them, The curve of the sectional splicing line includes an arc curve.
5. The subframe according to claim 3, characterized in that Among them, The shape formed by the straight line segments of the sectional splicing line includes at least one of a trapezoid, a triangle, and a rectangle.
6. The subframe according to claim 3, characterized in that At least part of the straight line segments are perpendicular to the first direction.
7. The subframe according to claim 3, characterized in that At least part of the straight line segments are parallel to the second direction.
8. The subframe according to claim 3, characterized in that The curved line segment is arranged between two of the straight line segments.
9. The subframe according to claim 1, characterized in that Among them, The sectional splicing lines of two adjacent ones of the spliced bodies extend along the second direction.
10. The subframe according to claim 1, characterized in that Among them, The sectional splicing line intersects the first direction obliquely or perpendicularly; or, the sectional splicing line intersects the second direction obliquely.
11. The subframe according to any one of claims 1 to 9, characterized in that Among them, The plurality of fixedly connected spliced bodies include two spliced bodies having different materials.
12. The subframe according to any one of claims 1 to 9, characterized in that Among them, The plurality of fixedly connected spliced bodies include two spliced bodies having different maximum thicknesses.
13. The subframe according to any one of claims 1 to 9, characterized in that Among them, The plurality of fixedly connected spliced bodies include two spliced bodies having different minimum thicknesses.
14. The subframe according to any one of claims 1 to 9, characterized in that Among them, The number of the spliced bodies in the frame body is greater than or equal to 3.
15. The subframe according to any one of claims 1 to 9, characterized in that Among them, The spliced bodies in the frame body are all formed by one-time stamping.
16. The subframe according to any one of claims 1 to 9, characterized in that The subframe includes two of the frame bodies arranged oppositely.
17. The subframe according to claim 16, characterized in that Among them, The spliced bodies of one of the two oppositely arranged frame bodies are arranged corresponding to the spliced bodies of the other frame body.
18. The subframe according to any one of claims 1 to 9, characterized in that The frame body is divided into: A crossbeam area, for forming the crossbeam of the subframe; A longitudinal beam area, for forming the longitudinal beam of the subframe; Wherein, at least one of the crossbeam area and the longitudinal beam area includes a plurality of the spliced bodies.
19. The subframe according to claim 18, wherein one of the splicing bodies at least constitutes at least a part of the crossbeam region or the longitudinal beam region.
20. The subframe according to claim 18, wherein the crossbeam region is constituted by one of the splicing bodies.
21. The subframe according to any one of claims 1 to 9, wherein the plurality of fixedly connected splicing bodies include at least two different splicing bodies; the subframe further includes: a mounting structure for a mount, a mounting structure for a suspension, and a mounting structure for a vehicle body; wherein, the mounting structure for a mount, the mounting structure for a suspension, and the mounting structure for a vehicle body are all mounted to the frame body; at least two of the mounting structure for a mount, the mounting structure for a suspension, and the mounting structure for a vehicle body are fixedly connected to two different splicing bodies.
22. The subframe according to any one of claims 1 to 9, wherein the plurality of fixedly connected splicing bodies include at least two splicing bodies fixedly connected by welding.
23. A vehicle, characterized in that, A subframe including the subframe according to any one of claims 1 to 22.