Auxiliary frame, frame and vehicle

Abstract

The invention discloses an auxiliary frame, a frame and a vehicle. The auxiliary frame comprises two cross beams and two longitudinal beams. Each cross beam extends in the first direction, and the two cross beams are arranged at intervals in the second direction. Each longitudinal beam extends in the second direction and is connected with the two cross beams, and the two longitudinal beams are arranged in the first direction in a spaced mode. In the cross section perpendicular to the first direction, the length of at least one cross beam in the second direction is smaller than the length of the cross beam in the third direction; and / or in a cross section perpendicular to the second direction, the length of at least one longitudinal beam in the first direction is smaller than the length of the longitudinal beam in the third direction. According to the auxiliary frame disclosed by the invention, the section shape of the at least one cross beam and / or the at least one longitudinal beam is designed into the vertical flat high shape, so that the bending and torsional rigidity and modal performance of the auxiliary frame are favorably improved, the arrangement stability of parts arranged on the auxiliary frame is favorably improved, and the service lives of the parts and the auxiliary frame are prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle frames, and in particular to a sub-frame, a vehicle frame and a vehicle thereof. Background Art

[0002] The subframe is a crucial component of the vehicle chassis, supporting and securing the engine, transmission, and other related components. It also carries the weight of the driver and passengers and withstands various forces generated during driving, such as traction, braking, and lateral forces. Typically installed between the vehicle body and the suspension system, the subframe acts as a bridge. It not only helps disperse vibrations transmitted from the engine and road, enhancing driving stability and comfort, but also strengthens the vehicle's structural strength and improves handling.

[0003] In the related art, the subframe has poor bending and torsional rigidity, which easily leads to deformation of the subframe and relative displacement of components mounted on the subframe, deteriorating working conditions, accelerating wear of components, and shortening their lifespan. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a subframe that improves the subframe's bending and torsional stiffness and modal performance, thereby enhancing the stability of components mounted on the subframe and extending the service life of the components and the subframe.

[0005] Another object of the present invention is to provide a vehicle frame.

[0006] Another object of the present invention is to provide a vehicle.

[0007] According to an embodiment of the first aspect of the present invention, the subframe includes: two cross beams, each of which extends along a first direction, and the two cross beams are arranged at intervals along a second direction; two longitudinal beams, each of which extends along the second direction and is connected to the two cross beams, and the two longitudinal beams are arranged at intervals along the first direction; wherein, in a cross section perpendicular to the first direction, the length of at least one of the cross beams in the second direction is shorter than its length in a third direction; and / or, in a cross section perpendicular to the second direction, the length of at least one of the longitudinal beams in the first direction is shorter than its length in the third direction, and the first direction, the second direction, and the third direction intersect with each other.

[0008] According to the subframe of the embodiment of the present invention, by designing at least one crossbeam and / or at least one longitudinal beam to be vertically flat and tall, the bending and torsional rigidity and modal performance of the subframe are improved, thereby facilitating the improvement of the installation stability of components installed on the subframe and extending the service life of the components and the subframe.

[0009] According to some embodiments of the present invention, the two beams are respectively a first beam and a second beam, and in a cross section perpendicular to the first direction, the ratio of the length of the first beam in the third direction to the length of the first beam in the second direction is 3:1 to 4:1; and / or, in a cross section perpendicular to the first direction, the ratio of the length of the second beam in the third direction to the length of the second beam in the second direction is 4:1 to 6:1.

[0010] According to some embodiments of the present invention, a ratio of a length of the longitudinal beam in the third direction to a corresponding length of the longitudinal beam in the first direction is 3:1 to 6:1.

[0011] According to some embodiments of the present invention, the first crossbeam includes a middle beam section and two side beam sections, the two side beam sections are respectively connected to the two ends of the middle beam section in the first direction, and a long strip hole is formed on the middle beam section, and the long strip hole extends along the first direction.

[0012] According to some embodiments of the present invention, in the third direction, the top surface of the middle beam segment is higher than the top surface of each of the side beam segments; in the third direction, the bottom surface of the middle beam segment is higher than the bottom surface of each of the side beam segments.

[0013] According to some embodiments of the present invention, a first installation interface portion is formed on each of the side beam segments, and the first installation interface portion is arranged adjacent to the middle beam segment.

[0014] According to some embodiments of the present invention, one end of the first mounting interface portion adjacent to the second beam protrudes from the first beam, and a plurality of first reinforcing ribs are provided at intervals on the outer peripheral side of the one end of the first mounting interface portion, and the first reinforcing ribs are used to connect the one end of the first mounting interface portion and the first beam; and / or, a plurality of annular grooves are formed on the surface of the first beam on the side away from the second beam, and the plurality of annular grooves are respectively located on the outer peripheral sides of a plurality of first mounting interface portions.

[0015] According to some embodiments of the present invention, the second beam includes a first beam segment and a second beam segment, the first beam segment and the second beam segment are connected along the third direction, the first beam segment is a hollow closed structure in cross section, and the second beam segment has a groove-shaped structure.

[0016] According to some embodiments of the present invention, a plurality of second mounting interface portions are formed on the first beam section, and the plurality of second mounting interface portions are spaced apart along the first direction; a plurality of connection ports are formed on the inner peripheral wall of each second mounting interface portion, and the plurality of connection ports are spaced apart along the circumference of the second mounting interface portion.

[0017] According to some embodiments of the present invention, a plurality of third mounting interface portions are formed on the second beam, and the plurality of third mounting interface portions are spaced apart along the first direction; wherein, the plurality of third mounting interface portions include a plurality of first sub-interface portions and a plurality of second sub-interface portions, a plurality of the first sub-interface portions are arranged on the first beam segment, and a plurality of the second sub-interface portions are arranged on the second beam segment, and each of the first sub-interface portions is arranged in a triangle with two adjacent second sub-interface portions.

[0018] According to some embodiments of the present invention, a plurality of fourth mounting interface portions are formed on each longitudinal beam, and the plurality of fourth mounting interface portions are respectively located on both sides of the longitudinal beam in the second direction.

[0019] According to some embodiments of the present invention, a through hole is further formed on each longitudinal beam, and a plurality of the fourth mounting interface portions are arranged at intervals along the circumference of the through hole.

[0020] The vehicle frame according to the second embodiment of the present invention includes the subframe according to the first embodiment of the present invention.

[0021] The vehicle according to the third embodiment of the present invention includes the subframe according to the first embodiment of the present invention, or the frame according to the second embodiment of the present invention.

[0022] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which: Figure 1 is a schematic diagram of a subframe according to an embodiment of the present invention; Figure 2 is a schematic diagram of a first cross member of a subframe according to an embodiment of the present invention; Figure 3 is a schematic diagram of a first cross member of a subframe according to an embodiment of the present invention from another angle; Figure 4 is a schematic diagram of a subframe according to another angle of an embodiment of the present invention; Figure 5 is a cross-sectional view of a second cross member of a subframe according to an embodiment of the present invention; Figure 6 is a partial cross-sectional view of a second cross member of a subframe according to an embodiment of the present invention; Figure 7 is a rear view of a subframe according to an embodiment of the present invention; Figure 8 is a top view of a subframe according to an embodiment of the present invention; Figure 9 is a bottom view of a subframe according to an embodiment of the present invention; Figure 10 is a side view of a subframe according to an embodiment of the present invention.

[0024] Reference numerals: 100: subframe; 1: First crossbeam; 10: Middle beam section; 11: Long strip hole; 12: First sub-crossbeam; 13: Second sub-crossbeam; 14: First mounting interface; 15: First reinforcement rib; 16: Annular groove; 20: Side beam section; 2: Second crossbeam; 21: First crossbeam section; 211: Second mounting interface; 212: Connecting port; 22: Second crossbeam section; 23: Third mounting interface; 231: First sub-interface; 232: Second sub-interface; 24: Second reinforcement rib; 25: Side beam; 26: Third reinforcement rib; 3: Longitudinal beam; 31: Through hole; 32: Fourth mounting interface; 33: Left / right traction arm mounting bracket mounting interface; 34: Left / right front vehicle body bushing mounting sleeve mounting interface; 35: Left / right lower spring support arm mounting bracket mounting interface; 36: Left / right rear vehicle body bushing mounting sleeve mounting interface; 37: Left / right front guide arm mounting bracket mounting interface; 38: Left / right rear upper cross arm mounting bracket mounting interface. DETAILED DESCRIPTION

[0025] In the related art, the cross-section of the subframe is often roughly square, that is, with equal width and height, resulting in poor bending and torsional stiffness and modal performance of the subframe. This can easily lead to deformation of the subframe, resulting in relative displacement of components installed on the subframe, worsening working conditions, accelerating component wear, and shortening their lifespan.

[0026] Reference below Figures 1-10 A subframe 100 according to an embodiment of the present invention will be described.

[0027] like Figures 1-10 As shown, the subframe 100 according to an embodiment of the present invention includes two cross beams and two longitudinal beams 3. The subframe 100 is suitable for a five-link suspension system equipped with a rear wheel steering function.

[0028] Specifically, each beam is arranged along a first direction (eg, Figure 1 The two beams extend in a second direction (eg, Figure 1Each longitudinal beam 3 extends along the second direction and is connected to two transverse beams, and the two longitudinal beams 3 are arranged at intervals along the first direction. In a cross section perpendicular to the first direction, the length of at least one transverse beam in the second direction is less than the length of at least one of the first transverse beam 1 and the second transverse beam 2 in the third direction (for example, Figure 1 and / or, in a cross section perpendicular to the second direction, the length of at least one longitudinal beam 3 in the first direction is less than the length of the corresponding longitudinal beam 3 in the third direction. The first direction, the second direction, and the third direction intersect.

[0029] For example, in Figure 1 、 Figure 4 、 Figure 8 and Figure 9 In the example, the subframe 100 formed by connecting two crossbeams and two longitudinal beams 3 is generally in the shape of a "well". The two longitudinal beams 3 can be connected to the two crossbeams by an arc transition, so that the entire subframe 100 is symmetrical about the central cross section of the two crossbeams 1 in the first direction.

[0030] At least one crossbeam is designed to have a vertically flattened and elevated cross-section in a cross-section perpendicular to the first direction, and / or at least one longitudinal beam 3 is designed to have a vertically flattened and elevated cross-section in a cross-section perpendicular to the second direction. This improves the flexural and torsional rigidity and modal performance of the subframe 100 compared to conventional subframes (in which crossbeams and longitudinal beams 3 have square cross-sections), thereby enhancing the structural strength of the subframe 100, improving the stability of the components mounted on the subframe 100, and extending the service life of the components and the subframe 100.

[0031] The sub-frame 100 may be formed by integral hollow casting of aluminum alloy; or may be cast into two cross beams and two longitudinal beams 3 respectively and then welded in sequence.

[0032] According to the subframe 100 of the embodiment of the present invention, by designing at least one crossbeam and / or at least one longitudinal beam 3 to be vertically flat and tall, the bending and torsional rigidity and modal performance of the subframe 100 are improved, thereby facilitating the improvement of the installation stability of the components installed on the subframe 100 and extending the service life of the components and the subframe 100.

[0033] According to some embodiments of the present invention, referring to Figures 1-4The two crossbeams are a first crossbeam 1 and a second crossbeam 2. In a cross section perpendicular to the first direction, the ratio of the length of the first crossbeam 1 in the third direction to the length of the first crossbeam 1 in the second direction is 3:1 to 4:1. In other words, the height of the cross section of the first crossbeam 1 is 3 to 4 times its width. The vertically flat structure of the first crossbeam 1 improves its flexural and torsional stiffness and modal performance, thereby increasing its structural strength and extending its service life.

[0034] Reference Figure 1 、 Figure 4 and Figure 5 In a cross section perpendicular to the first direction, the ratio of the length of the second crossbeam 2 in the third direction to the length of the second crossbeam 2 in the second direction is 4:1 to 6:1. In other words, the height of the vertical cross section of the second crossbeam 2 is 4 to 6 times its width. The second crossbeam 2 has a vertically flat structure, which helps improve the bending and torsional rigidity and modal performance of the second crossbeam 2, thereby improving the structural strength of the second crossbeam 2 and extending its service life.

[0035] The first crossbeam 1 may be located in front of the second crossbeam 2 in the second direction, or the second crossbeam 2 may be located in front of the first crossbeam 1 in the second direction.

[0036] According to some embodiments of the present invention, referring to Figure 1 and Figure 5 The ratio of the length of the longitudinal beam 3 in the third direction to the corresponding length of the longitudinal beam 3 in the first direction is 3:1 to 6:1. In other words, the height of the vertical cross-section of the longitudinal beam 3 is 3 to 6 times its width. The longitudinal beam 3 has a vertically flat structure, which helps improve the bending and torsional rigidity and modal performance of the longitudinal beam 3, thereby improving the structural strength of the longitudinal beam 3 and extending the service life of the longitudinal beam 3.

[0037] According to some specific embodiments of the present invention, the first crossbeam 1 includes a middle beam section 10 and two side beam sections 20, and the two side beam sections 20 are respectively connected to the two ends of the middle beam section 10 in the first direction. The middle beam section 10 is formed with a long strip hole 11, and the long strip hole 11 extends along the first direction. Along the first direction, the side beam section 20, the middle beam section 10 and the side beam section 20 are connected in sequence, wherein the long strip hole 11 on the middle beam section 10 divides the first crossbeam 1 into two parts along the third direction. For example, Figures 1-4As shown, the middle section 10 has an elongated hole 11 (e.g., a waist-shaped hole) formed in the middle region. This elongated hole 11 separates the middle section 10 along the third direction into a first sub-beam 12 and a second sub-beam 13. The first sub-beam 12 can be used to withstand vertical forces such as vehicle loads, while the second sub-beam 13 can be used to resist horizontal forces or torque. Alternatively, under different operating conditions, the first and second sub-beams 12 and 13 can share the load in a certain proportion. Thus, the elongated hole 11 in the first crossbeam 1 improves the bending and torsional resistance of the first crossbeam 1 of the subframe 100 and reduces its weight. Furthermore, the elongated hole 11 provides a wider assembly space for the powertrain wiring harness, facilitating the assembly of the powertrain and wiring harness within the subframe 100. Furthermore, the design of the elongated hole 11 in the first crossbeam 1 effectively reduces the weight of the subframe 100 while ensuring its overall performance.

[0038] The first sub-crossbeam 12 and the second sub-crossbeam 13 may be integrally cast, or the first sub-crossbeam 12 and the second sub-crossbeam 13 may be cast separately and then welded.

[0039] Furthermore, in the third direction, the top surface of the middle beam section 10 is higher than the top surface of each side beam section 20; in the third direction, the bottom surface of the middle beam section 10 is higher than the bottom surface of each side beam section 20. Figures 1-4 In the third direction, at least a portion of the first cross member 1 protrudes away from the ground. Thus, the first cross member 1 has an arched bridge shape. This provides space for wiring harnesses and other components at the bottom of the middle beam section 10, or helps avoid other surrounding components, thereby improving the applicability of the subframe 100.

[0040] For example, all cross sections of 1 are substantially the same rectangular cross section, thereby increasing the structural stability and consistency of the first cross beam 1 .

[0041] Further, refer to Figures 1-4 , a first mounting interface portion 14 is formed on each side beam section 20, and the first mounting interface portion is arranged adjacent to the middle beam section 10. In the description of the present invention, the meaning of "multiple" is two or more. For example, Figures 1-4 As shown, a first mounting interface portion 14 is provided on both sides of the elongated hole 11 of the first cross beam 1 in the first direction. The axial direction of the first mounting interface portion 14 is flush with the X direction of the vehicle, which facilitates the press-fitting of the front power suspension bushing of the vehicle and the assembly and disassembly of the powertrain.

[0042] In addition, refer to Figure 3One end of the first mounting interface portion 14, adjacent to the second crossbeam 2, protrudes from the first crossbeam 1. Multiple first reinforcing ribs 15 are spaced apart around the outer periphery of this end of the first mounting interface portion 14. The first reinforcing ribs 15 connect the end of the first mounting interface portion 14 to the first crossbeam 1. For example, four first reinforcing ribs 15 are spaced apart around the outer periphery of the side of the first mounting interface portion 14 facing the second crossbeam 2. At least a portion of the first reinforcing ribs 15 connects to the outer periphery of the corresponding surface of the first mounting interface portion 14 protruding from the first crossbeam 1. This helps increase the rigidity and strength of the portion of the first mounting interface portion 14 protruding from the surface of the first crossbeam 1, thereby improving the operational stability and reliability of the first mounting interface portion 14 and enhancing the installation stability of the front power mount bushing that fits within the first mounting interface portion 14.

[0043] Reference Figure 2 A plurality of annular grooves 16 are formed on the surface of the first crossbeam 1 on the side away from the second crossbeam 2. The plurality of annular grooves 16 are respectively located on the outer circumference of the plurality of first mounting interface portions 14. Each first mounting interface portion 14 is provided with at least one annular groove 16 on its outer circumference. In this way, the first crossbeam 1 can be manufactured by core pulling through a mold. When the mold is closed, the core pulling mechanism is in a specific position and together with other mold components forms the mold cavity of the product, so that the material for preparing the first crossbeam 1 is filled in the mold cavity and solidified. When the product is formed, the core pulling mechanism is pulled out of the product by a specific driving device, such as a hydraulic, pneumatic or mechanical device, so that the first crossbeam 1 can be smoothly demolded, thereby obtaining a first crossbeam 1 with a plurality of annular grooves 16.

[0044] In addition, the design of the annular groove 16 helps to reduce the amount of machining on the outer peripheral side of the first mounting interface portion 14 away from the second beam 2 during the production of the first beam 1, which is beneficial to reducing the machining cost of the first beam 1.

[0045] According to some embodiments of the present invention, referring to Figure 4 、 Figure 5 and Figure 7 The second cross beam 2 includes a first cross beam section 21 and a second cross beam section 22, which are connected along the third direction. The first cross beam section 21 is a hollow closed structure in cross section, and the second cross beam section 22 has a groove structure. Figure 5As shown, the first crossbeam segment 21 can be a rectangular hollow closed structure. The opening of the trough-shaped structure on the second crossbeam segment 22 faces away from the first crossbeam 1, making the second crossbeam segment 22 roughly L-shaped. The first crossbeam segment 21 and the second crossbeam segment 22 are connected. Thus, the designs of the first crossbeam segment 21 and the second crossbeam segment 22 are conducive to making the space of the second crossbeam 2 of the subframe 100 more compact in the third direction, which is more convenient for the structural layout of the peripheral systems of the vehicle. At the same time, the bending and torsional resistance performance of the subframe 100 is effectively improved, and the dynamic stiffness performance of the systems connected to the second crossbeam 2 is strengthened.

[0046] Among them, the open trough-shaped structure of the second crossbeam segment 22 can adopt integral core-pulling molding, making the dimensional accuracy and surface accuracy of the second crossbeam segment 22 better, and the integral core-pulling slider is easier to arrange cooling water channels, which has an excellent effect on regulating the temperature of the casting mold.

[0047] Further, referring to Figure 4 and Figure 7 , a plurality of second mounting interface parts 211 are formed on the first crossbeam segment 21, and the plurality of second mounting interface parts 211 are spaced apart along the first direction. The second mounting interface part 211 is suitable for setting the rear power system mounting bushing. Among them, the second mounting interface part 211 is suitable for being flush with the first mounting interface part 14. Two second mounting interface parts 211 and two first mounting interface parts 14 can be selected to jointly form a four-point power suspension mounting structure; or either the first mounting interface part 14 or the second mounting interface part 211 is two, and the other is one, so as to jointly form a three-point suspension structure arranged in a "pin" shape. When assembling the power assembly, only need to hoist the power assembly into the frame of the subframe 100, and screw in the connecting bolts from the outside to the inside of the first mounting interface part 14 and the second mounting interface part 211 of the subframe 100 respectively. The settings of the first mounting interface part 14 on the first crossbeam 1 and the second mounting interface part 211 on the second crossbeam 2 save the alignment time of the mounting bushing joints during the assembly of the power assembly (alignment work refers to the process of precisely aligning the positions, axes, planes or angles of two or more components through adjustment during machining, assembly or equipment installation. The purpose is to ensure the smooth operation of the equipment, accurate fitting of parts, and avoid wear or failures caused by errors), which is conducive to improving the assembly and maintenance disassembly efficiency of the subframe 100.

[0048] Thus, the power assembly is installed with a four-point suspension structure or a three-point suspension structure symmetrically arranged in the first direction. When assembling and disassembling the power assembly, only need to hoist the power assembly into the frame of the subframe 100, and screw in the connecting bolts from the outside to the inside of the subframe 100 respectively. In this way, compared with the traditional vertically arranged suspension system, the assembly and maintenance disassembly of the subframe 100 are more convenient, which is conducive to shortening the alignment time of each hole position.

[0049] Referring to Figure 4 、 Figure 6 and Figure 7 , the inner circumferential wall of each second mounting interface portion 211 is formed with a plurality of connection ports 212, and the plurality of connection ports 212 are spaced apart along the circumference of the second mounting interface portion 211. The connection ports 212 can be evenly spaced apart in the circumference of the second mounting interface portion 211, with a connection port 212 provided every 90°, or a connection port 212 can be provided every 120°. No specific limitation is made here. The plurality of connection ports 212 are all connected to the second mounting interface portion 211 as the mounting sites of the rear power system suspension bushing, which increases the contact area between the rear power system suspension bushing and the second crossbeam 2, thereby improving the connection stability and reliability between the rear power system suspension bushing and the second crossbeam 2.

[0050] During the preparation of the second crossbeam 2, sand cores can be set at the corresponding positions of the second installation interface part 211 and the connecting port 212 to form the second installation interface part 211 and the connecting port 212. Among them, by connecting the sand core of the second installation interface part 211 and the sand core of the connecting port 212 as one, the problems of the local thickness of the sand core being too thin and the sand core being easy to break are solved. The interface between the sand core and the second installation interface part 211 is designed with a chamfered structure with a variable cross-section to solve the problem of scratching the outer sleeve of the bushing when die-casting the bushing. In addition, by connecting the sand core of the second installation interface part 211 and the sand core of the connecting port 212 as one, the strength of the sand core can be improved, and the problem of the sand core being thinned and easy to break due to the avoidance of the suspension bushing hole here can be solved.

[0051] According to some embodiments of the present invention, a plurality of third mounting interface portions 23 are formed on the second crossbeam 2, and the plurality of third mounting interface portions 23 are spaced apart along the first direction. The plurality of third mounting interface portions 23 include a plurality of first sub-interface portions 231 and a plurality of second sub-interface portions 232. The plurality of first sub-interface portions 231 are provided on the first crossbeam section 21, and the plurality of second sub-interface portions 232 are provided on the second crossbeam section 22. Each first sub-interface portion 231 and two adjacent second sub-interface portions 232 are arranged in a triangle.

[0052] For example, Figure 4 and Figure 7As shown, six third mounting interfaces 23 are formed on the second crossbeam 2. Two third mounting interfaces 23 are located on the first crossbeam section 21 (i.e., first sub-interfaces 231), and four third mounting interfaces 23 are located on the second crossbeam section 22 (i.e., second sub-interfaces 232). These six third mounting interfaces 23 are symmetrical along the central cross-section of the second crossbeam 2 in the first direction. One third mounting interface 23 located on the first crossbeam section 21 (i.e., first sub-interface 231) and two third mounting interfaces 23 located on the second crossbeam section 22 (i.e., second sub-interfaces 232) constitute a rear-wheel steering system mounting interface group. These three third mounting interfaces 23 are arranged in a triangle (e.g., a right triangle) and securely connect the left or right rear-wheel steering system to the second crossbeam 2 via a threaded connection. This facilitates separate replacement and repair of the left or right rear-wheel steering system, reducing the maintenance and replacement costs of the subframe 100. In addition, when the bolt groups for installing the rear-wheel steering system of the present invention are arranged symmetrically in a triangle, it is also compatible with the installation of an integral rear-wheel steering system.

[0053] A second reinforcing rib 24 is provided between each first sub-interface portion 231 and the adjacent second sub-interface portion 232, that is, the six third mounting interface portions 23 can pass through a plurality of second reinforcing ribs 24 (for example, Figure 4 and Figure 7 The six second reinforcing ribs 24 shown are combined in a W-shape to connect and reinforce the first sub-interface portion 231 and the second sub-interface portion 232. At least two of the second reinforcing ribs 24 extend along the third direction as auxiliary supports, forming a triangular truss structure for the multiple third mounting interface portions 23. This ensures sufficient rigidity and strength for each of the multiple third mounting interface portions 23, enhancing the stability of the second crossbeam 2. Furthermore, the interconnection of the multiple third mounting interface portions 23 by the second reinforcing ribs 24 facilitates mold filling and shrinkage compensation during casting, reducing casting defects in each of the third mounting interface portions 23.

[0054] According to some embodiments of the present invention, for example, Figure 7 and Figure 8 As shown, a C-shaped side member 25 is provided on the side of the second cross-member section 22 away from the first cross-member section 21. The side member 25 connects to the two longitudinal beams 3 at both ends in the first direction, achieving a smooth transition between the second cross-member 2 and the two longitudinal beams 3, thus providing a stable frame structure for the subframe 100. Thus, the design of the side member 25 integrally connects the second cross-member 2 and the two longitudinal beams 3, contributing to the increased rigidity of the second cross-member 2 and the longitudinal beams 3 at multiple mounting points in the second direction.

[0055] In addition, refer to Figure 7Two third reinforcing ribs 26 extending along the first direction can be designed in the arc area where the "C"-shaped side beam 25 connects and transitions with the two longitudinal beams 3, so as to improve the torsional stiffness and fatigue performance of the connection transition area between the side beam 25 and the longitudinal beam 3.

[0056] According to some embodiments of the present invention, referring to Figure 1 and Figure 10 Each longitudinal beam 3 is formed with multiple fourth mounting interfaces 32, located on both sides of the longitudinal beam 3 in the second direction. These fourth mounting interfaces 32 provide support for the rear suspension system and withstand loads from the suspension system and the vehicle body. Providing these fourth mounting interfaces 32 on both sides of the longitudinal beam 3 in the second direction helps distribute the load, avoids stress concentration, and improves the structural strength of the longitudinal beam 3, thereby extending its service life.

[0057] Further, refer to Figure 1 and Figure 10 Each longitudinal beam 3 also has a through-hole 31 formed therein, with a plurality of fourth mounting interface portions 32 spaced circumferentially around the through-hole 31. The through-hole 31 provides assembly and working space for the drive shaft. The through-hole 31 is a closed ring shape, suitable for manufacturing using a transverse core-pulling method. An integral sand core can be positioned within the through-hole 31 to enhance smoothness of the through-hole 31. The circumferential spacing of the plurality of fourth mounting interface portions 32 helps enhance the structural stability of the longitudinal beam 3, ensuring its strength and extending its service life.

[0058] like Figure 1 、 Figure 4 、 Figure 8 and Figure 9 As shown, the two longitudinal beams 3 are symmetrical structures, which respectively integrate multiple fourth mounting interface parts 32, including the left / right traction arm mounting bracket mounting interface part 33, the left / right front vehicle body bushing mounting sleeve mounting interface part 34, the left / right lower spring support arm mounting bracket mounting interface part 35, the left / right rear vehicle body bushing mounting sleeve mounting interface part 36, the left / right front guide arm mounting bracket mounting interface part 37 and the left / right rear upper cross arm mounting bracket mounting interface part 38. The above-mentioned multiple fourth mounting interface parts 32 provide support for the installation of the rear suspension system and bear the load from the suspension system and the vehicle body.

[0059] The left / right traction arm mounting bracket mounting interface portion 33 is arranged on the side of the left / right front vehicle body bushing mounting sleeve mounting interface portion 34 facing the first crossbeam 1. The left / right traction arm mounting bracket mounting interface portion 33 is connected to the left / right front vehicle body bushing mounting sleeve mounting interface portion 34 as a whole, which is beneficial to improving the mounting bracket stiffness of the traction arm.

[0060] like Figure 8As shown, the mounting interface 33 of the left / right traction arm mounting bracket is designed as two independent trapezoidal tabs. The inner and outer sides of each tab are CNC-machined to precise parallel planes (CNC machining, or Computer Numerical Control Machining, is an advanced manufacturing technology that uses digital control programs to precisely control machine tool motion and machining processes). The traction arm bushing is mounted to the inner opening of the left / right traction arm mounting bracket and secured with a through-hole bolt and nut assembly. The proximity of the left / right traction arm mounting bracket to the first crossbeam 1 improves the dynamic stiffness of the mounting bracket.

[0061] like Figure 8 As shown, the left / right front body bushing mounting sleeve mounting interface portion 34 is designed as a cylindrical structure, and the cylinder is respectively half-wrapped and connected to the left and right longitudinal beams 3 as a whole, so that the front body bushing sleeve has higher strength and rigidity performance.

[0062] like Figure 8 and Figure 9 As shown, the left / right lower spring support arm mounting bracket mounting interface 35 is located on the lower extension platform of the two longitudinal beams 3. Triangular reinforcement ribs are designed at the base of the platform to enhance its rigidity. The left / right lower spring support arm mounting bracket mounting interface 35 utilizes two independent tab structures. The front tab is L-shaped and connected to the underside of the longitudinal beam 3, while the rear tab is U-shaped and connected to the C-shaped side beam 25 of the second crossbeam 2.

[0063] like Figure 8 As shown, the left / right rear body bushing mounting sleeve mounting interface portion 36 is similar in structure to the first mounting interface portion 14, and its position and the center of the interface of the second cross beam 22 are both in the first direction, which can effectively shorten the lever arm length of the second cross beam 2 and improve the stiffness and strength of the rear power suspension and rear wheel steering mounting interface.

[0064] like Figure 9 As shown, the left / right front guide arm mounting bracket mounting interface portion 37 is located on the upper part of the longitudinal beam 3 facing the side of the first cross beam 1, and the structural design is a "U" open crotch bracket structure, which is beneficial to improving the strength of the left / right front guide arm mounting bracket mounting interface portion 37; the left / right front guide arm mounting bracket mounting interface portion 37 facing the first cross beam 1 is a single-piece bracket, and the left / right front guide arm mounting bracket mounting interface portion 37 facing the second cross beam 2 is an aluminum threaded boss, and the traction arm is installed on the inner side of the U-shaped open crotch and is fastened to the aluminum threaded boss by bolts passing through the single-piece bracket.

[0065] like Figure 9 As shown, the left / right rear upper cross arm mounting bracket mounting interface portion 38 is located on the upper part of the longitudinal beam 3 facing the side of the second cross beam 2, and its structural design is a "U"-shaped ear structure. Compared with the open ear structure, the "U"-shaped structure is used to connect the ears on both sides to obtain better axial stiffness.

[0066] The vehicle frame according to the second embodiment of the present invention includes the subframe 100 according to the first embodiment of the present invention.

[0067] The vehicle frame according to the embodiment of the present invention is helpful to improve the bending and torsional rigidity and modal performance of the vehicle frame, thereby facilitating the improvement of the reliability of the vehicle frame and extending the service life of the vehicle frame.

[0068] The vehicle according to the third embodiment of the present invention includes the subframe 100 according to the first embodiment of the present invention, or the frame according to the second embodiment of the present invention.

[0069] The vehicle according to the embodiment of the present invention adopts the above-mentioned subframe 100 or frame, which helps to improve the overall structural strength of the vehicle, improve the reliability and safety of the vehicle, and thus help to improve the market competitiveness of the vehicle.

[0070] Other structures and operations of the vehicle frame or vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0071] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0073] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0074] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A subframe (100), characterized in that: include: Two crossbeams, each of the crossbeams extending along a first direction, and the two crossbeams are spaced apart along a second direction; Two longitudinal beams (3), each longitudinal beam (3) extending along the second direction and connected to the two transverse beams, the two longitudinal beams (3) being arranged at intervals along the first direction; wherein, in a cross section perpendicular to the first direction, a length of at least one of the beams in the second direction is smaller than a length thereof in the third direction; and / or, In a cross section perpendicular to the second direction, the length of at least one longitudinal beam (3) in the first direction is smaller than its length in the third direction. The first direction, the second direction, and the third direction intersect with each other.

2. The subframe (100) according to claim 1, characterized in that The two crossbeams are respectively a first crossbeam (1) and a second crossbeam (2), In a cross section perpendicular to the first direction, the ratio of the length of the first beam (1) in the third direction to the length of the first beam (1) in the second direction is 3:1 to 4:1; and / or, In a cross section perpendicular to the first direction, a ratio of a length of the second beam (2) in the third direction to a length of the second beam (2) in the second direction is 4:1 to 6:

1.

3. The subframe (100) according to claim 1, characterized in that The ratio of the length of the longitudinal beam (3) in the third direction to the corresponding length of the longitudinal beam (3) in the first direction is 3:1 to 6:

1.

4. The subframe (100) according to claim 2, characterized in that The first crossbeam (1) comprises a middle beam section (10) and two side beam sections (20), wherein the two side beam sections (20) are respectively connected to two ends of the middle beam section (10) in the first direction. An elongated hole (11) is formed on the middle beam section (10), and the elongated hole (11) extends along the first direction.

5. The subframe (100) according to claim 4, characterized in that In the third direction, the top surface of the middle beam section (10) is higher than the top surface of each side beam section (20); In the third direction, the bottom surface of the middle beam section (10) is higher than the bottom surface of each side beam section (20).

6. The subframe (100) according to claim 4, characterized in that A first mounting interface portion (14) is formed on each of the side beam sections (20), and the first mounting interface portion (14) is arranged adjacent to the middle beam section (10).

7. The subframe (100) according to claim 6, characterized in that One end of the first mounting interface portion (14) adjacent to the second crossbeam (2) protrudes from the first crossbeam (1), and a plurality of first reinforcing ribs (15) are provided at intervals on the outer peripheral side of the one end of the first mounting interface portion (14), and the first reinforcing ribs (15) are used to connect the one end of the first mounting interface portion (14) and the first crossbeam (1); and / or, A plurality of annular grooves (16) are formed on a surface of the first crossbeam (1) on a side away from the second crossbeam (2), and the plurality of annular grooves (16) are respectively located on the outer peripheral sides of the plurality of first mounting interface portions (14).

8. The subframe (100) according to claim 2, characterized in that The second crossbeam (2) comprises a first crossbeam section (21) and a second crossbeam section (22), wherein the first crossbeam section (21) and the second crossbeam section (22) are connected along the third direction, the first crossbeam section (21) is a hollow closed structure in cross section, and the second crossbeam section (22) has a groove-shaped structure.

9. The subframe (100) according to claim 8, characterized in that A plurality of second mounting interface portions (211) are formed on the first crossbeam section (21), and the plurality of second mounting interface portions (211) are spaced apart along the first direction; The inner peripheral wall of each second mounting interface portion (211) is formed with a plurality of connection openings (212), and the plurality of connection openings (212) are spaced apart along the circumference of the second mounting interface portion (211).

10. The subframe (100) according to claim 8, characterized in that A plurality of third mounting interface portions (23) are formed on the second crossbeam (2), and the plurality of third mounting interface portions (23) are spaced apart along the first direction; The plurality of third mounting interface portions (23) include a plurality of first sub-interface portions (231) and a plurality of second sub-interface portions (232), the plurality of first sub-interface portions (231) being arranged on the first beam section (21), the plurality of second sub-interface portions (232) being arranged on the second beam section (22), and each first sub-interface portion (231) and two adjacent second sub-interface portions (232) being arranged in a triangle.

11. The subframe (100) according to any one of claims 1 to 10, characterized in that: A plurality of fourth mounting interface portions (32) are formed on each longitudinal beam (3), and the plurality of fourth mounting interface portions (32) are respectively located on both sides of the longitudinal beam (3) in the second direction.

12. The subframe (100) according to claim 11, characterized in that A through hole (31) is also formed on each longitudinal beam (3), and a plurality of fourth mounting interface portions (32) are arranged at intervals along the circumference of the through hole (31).

13. A vehicle frame, characterized in that: Comprising the subframe (100) according to any one of claims 1-12.

14. A vehicle, characterized in that: It comprises the subframe (100) according to any one of claims 1 to 12, or the frame according to claim 13.

Images