A rear subframe, rear suspension assembly and vehicle

Abstract

The utility model discloses a kind of rear subframe, rear suspension assembly and car, comprising: main body frame, including front crossbeam, rear crossbeam, left side sill and right side sill, the front crossbeam, rear crossbeam, left side sill and right side sill are all made of hollow pipe material, the main body frame forms rear drive motor installation space between the front crossbeam and rear crossbeam, the middle part of left side sill and right side sill is curved upwards, the main body frame forms transmission shaft arrangement space below the curved position of left side sill and right side sill;Rear suspension mounting bracket is set in the main body frame.The utility model realizes the maximization of rear subframe universality of front drive and rear drive vehicle type, improves development efficiency, reduces rear subframe development cost, shortens development cycle.

Description

Technical Field

[0001] This utility model is applicable to the automotive field, and in particular relates to a rear subframe, a rear suspension assembly, and an automobile. Background Technology

[0002] The rear subframe, as a crucial component of a vehicle, influences overall driving quality and cost. Compared to a torsion beam subframe, an independent rear suspension offers superior overall performance and greater design flexibility, and has long been a selling point for its high-quality driving experience. In recent years, with the electrification of the automotive industry and the increasing prevalence of rear-wheel drive and four-wheel drive vehicles, the application of independent rear suspension subframes has become more widespread, increasingly appearing in models priced around 100,000 yuan.

[0003] Since the cost of a rear independent suspension subframe is higher than that of a torsion beam structure, cost control and development speed are becoming increasingly important in the context of intensifying competition in the automotive industry. Currently, major mainstream automakers and emerging automakers are all promoting platform-based models, so developing a universal rear subframe is an inevitable choice.

[0004] In summary, the problems existing in the relevant technologies urgently need to be solved. Utility Model Content

[0005] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a rear subframe, a rear suspension assembly, and an automobile.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] Firstly, a rear subframe includes:

[0008] The main frame includes a front crossbeam, a rear crossbeam, a left longitudinal beam, and a right longitudinal beam. The front and rear crossbeams are welded laterally between the left and right longitudinal beams to form the main frame. The front, rear, left, and right longitudinal beams are all made of hollow tubing. The main frame forms a rear drive motor mounting space between the front and rear crossbeams. The middle of the left and right longitudinal beams bends upward. The main frame forms a drive shaft arrangement space below the bending position of the left and right longitudinal beams.

[0009] The rear suspension mounting bracket is installed on the main frame.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the rear suspension mounting bracket includes a rear suspension front lower control arm mounting bracket, a rear suspension front upper control arm mounting bracket, a rear suspension rear lower control arm mounting bracket, a rear suspension rear upper control arm mounting bracket, and a rear suspension toe-in tie rod mounting bracket.

[0011] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the rear suspension front lower control arm mounting bracket, the rear suspension front upper control arm mounting bracket, and the rear suspension rear upper control arm mounting bracket are symmetrically arranged on the left longitudinal beam and the right longitudinal beam.

[0012] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the rear suspension lower control arm mounting bracket is disposed at the overlap of the rear crossbeam and the left longitudinal beam and the right longitudinal beam.

[0013] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the rear suspension lower control arm mounting bracket includes a first bracket plate and a second bracket plate, both of which are welded to the main frame. At least one of the first bracket plate and the second bracket plate has a folded edge, and the first bracket plate and the second bracket plate overlap through the folded edge. A bracket cavity is formed between the first bracket plate and the second bracket plate, and the bracket cavity has a first mounting port for mounting the rear suspension lower control arm.

[0014] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the rear suspension toe-in mounting bracket includes a third bracket plate, the third bracket plate being disposed on the back side of the second bracket plate, and a second mounting port for mounting the rear suspension toe-in is provided between the third bracket plate and the second bracket plate.

[0015] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the main frame is provided with a left longitudinal beam stabilizer bracket at the overlap of the front crossbeam and the left longitudinal beam, and the main frame is provided with a right longitudinal beam stabilizer bracket at the overlap of the front crossbeam and the right longitudinal beam.

[0016] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, both the front and rear ends of the left and right longitudinal beams are bent outward in the transverse direction, and sleeves are provided at the ends.

[0017] In a second aspect, a rear suspension assembly includes a rear subframe as described in any implementation of the first aspect.

[0018] Thirdly, an automobile includes the rear suspension assembly described in any implementation of the second aspect.

[0019] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of this utility model, the front crossbeam, rear crossbeam, left longitudinal beam and right longitudinal beam are all made of hollow tubing. Different cross-sectional shapes and thicknesses can be processed by combining CAE analysis results. Under the condition of meeting strength and other requirements, the weight reduction can be maximized and complex shape forming can be achieved. Compared with the stamped and welded structure subframe, it has a lower cost advantage.

[0020] Simultaneously, mounting points for the rear drive motor are reserved on the front and rear crossbeams, creating mounting space for the rear drive motor between them. Furthermore, the right and left longitudinal beams are designed with curved structures to provide space for the drive shaft. This provides space and mounting points for the rear drive powertrain of the electric vehicle, allowing for complete development of the rear-wheel-drive version of the electric vehicle on this rear subframe. This maximizes the commonality of the rear subframe between front-wheel-drive and rear-wheel-drive models, improves development efficiency, reduces development costs, and shortens the development cycle.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is an isometric view of an embodiment of the rear subframe of this utility model;

[0024] Figure 2 This is a bottom view of an embodiment of the rear subframe of this utility model;

[0025] Figure 3 This is a side view of the structure of one embodiment of the rear subframe of this utility model;

[0026] Figure 4 This is a rear view of an embodiment of the rear subframe of this utility model. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0029] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0030] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0031] in, Figure 1 The reference direction coordinate system of this utility model embodiment is given below, in conjunction with Figure 1 The embodiments of this utility model will be described in the directions shown.

[0032] See Figure 1 , Figure 2 , Figure 3 This utility model provides a rear subframe, including a main frame and a rear suspension mounting bracket. The main frame includes a front crossbeam 101, a rear crossbeam 102, a left longitudinal beam 103, and a right longitudinal beam 104. The front crossbeam 101 and the rear crossbeam 102 are welded laterally between the left longitudinal beam 103 and the right longitudinal beam 104 to form the main frame. The front crossbeam 101, the rear crossbeam 102, the left longitudinal beam 103, and the right longitudinal beam 104 are all made of hollow tubing. The main frame forms a rear drive motor mounting space between the front crossbeam 101 and the rear crossbeam 102. The middle of the left longitudinal beam 103 and the right longitudinal beam 104 bends upward. The main frame forms a drive shaft arrangement space below the bending position of the left longitudinal beam 103 and the right longitudinal beam 104. The rear suspension mounting bracket is disposed on the main frame and is used to connect the rear suspension multi-link to the main frame.

[0033] Combination Figure 1 , Figure 2 , Figure 3In the technical solution of this utility model, the front crossbeam 101, rear crossbeam 102, left longitudinal beam 103 and right longitudinal beam 104 are all made of hollow tubing. Based on CAE analysis results, different cross-sectional shapes and thicknesses can be processed to maximize lightweighting while meeting strength and other requirements, and to achieve complex shape forming. Compared with the stamped and welded subframe structure, it has a lower cost advantage.

[0034] Meanwhile, mounting points for the rear drive motor are reserved on the front crossbeam 101 and the rear crossbeam 102, forming a mounting space for the rear drive motor between the front crossbeam 101 and the rear crossbeam 102. Furthermore, the right longitudinal beam 104 and the left longitudinal beam 103 are designed with curved structures to reserve space for the arrangement of the drive shaft. This provides space and mounting points for the rear drive powertrain of the electric vehicle, allowing the development of the rear-wheel drive version of the electric vehicle to be entirely based on this rear subframe, maximizing the commonality of the rear subframe between front-wheel drive and rear-wheel drive models; reducing the work of setting suspension hardpoints for the rear subframe of rear-wheel drive models, improving development efficiency, reducing the development cost of the rear subframe, and shortening the development cycle.

[0035] The rear suspension mounting bracket can be configured according to the specific structure of the rear suspension. In some embodiments, see [reference needed]. Figures 1-4 The rear suspension mounting brackets include a rear suspension front lower control arm mounting bracket 201, a rear suspension front upper control arm mounting bracket 202, a rear suspension rear lower control arm mounting bracket 203, a rear suspension rear upper control arm mounting bracket 204, and a rear suspension toe-in bracket 205. The rear suspension front lower control arm mounting bracket 201 is used to mount the rear suspension front lower control arm, the rear suspension front upper control arm mounting bracket 202 is used to mount the rear suspension front upper control arm, the rear suspension rear lower control arm mounting bracket 203 is used to mount the rear suspension rear lower control arm, the rear suspension rear upper control arm mounting bracket 204 is used to mount the rear suspension rear upper control arm, and the rear suspension toe-in bracket 205 is used to mount the rear suspension toe-in bracket. This embodiment can meet the installation requirements of a five-link rear suspension.

[0036] Further, see Figure 1 , Figure 2 , Figure 3 The rear suspension lower control arm mounting bracket 201, rear suspension upper control arm mounting bracket 202, and rear suspension upper control arm mounting bracket 204 are symmetrically arranged on the left longitudinal beam 103 and the right longitudinal beam 104. This embodiment comprehensively considers the suspensions of different vehicle models on the platform, and designs the mounting bracket layout in advance to ensure that the rear suspension is in the same position on the subframe; it maximizes the commonality of the rear subframe and suspension across different models on the same platform, and reduces development costs.

[0037] In some embodiments, see Figure 2The rear lower control arm mounting bracket 203 is located at the overlap of the rear crossbeam 102 with the left longitudinal beam 103 and the right longitudinal beam 104. This arrangement increases the connection strength between the left longitudinal beam 103 and the rear crossbeam 102, thereby enhancing the strength and rigidity of the rear subframe main structure.

[0038] Further, see Figure 2 , Figure 3 The rear lower control arm mounting bracket 203 includes a first bracket plate 206 and a second bracket plate 207. Both the first bracket plate 206 and the second bracket plate 207 are welded to the main frame. At least one of the first bracket plate 206 and the second bracket plate 207 has a folded edge 208. The first bracket plate 206 and the second bracket plate 207 overlap through the folded edge 208, forming a bracket cavity between the first bracket plate 206 and the second bracket plate 207. The bracket cavity has a first mounting port 209 for mounting the rear lower control arm. In use, the rear lower control arm can be mounted in the first mounting port 209 and mounted on the first bracket plate 206 and the second bracket plate 207 using bolts provided in the bolt holes on both sides of the first mounting port 209. In this embodiment, the rear lower control arm mounting bracket 203 adopts a box-shaped structure formed by the first bracket plate 206 and the second bracket plate 207, which effectively improves the structural strength of the rear lower control arm mounting bracket 203.

[0039] Further, see Figure 2 , Figure 3 The rear suspension toe-in mounting bracket 205 includes a third bracket plate 210, which is disposed on the back side of the second bracket plate 207. A second mounting port 211 for mounting the rear suspension toe-in is provided between the third bracket plate 210 and the second bracket plate 207. In use, the rear suspension toe-in can be installed in the second mounting port 211 and then mounted on the third bracket plate 210 and the second bracket plate 207 by bolts provided in the bolt holes on both sides of the second mounting port 211. In this embodiment, the rear suspension toe-in mounting bracket 205 and the rear suspension lower control arm mounting bracket 203 share the second bracket plate 207, resulting in a simpler structure, lower cost, and reduced relative displacement between the rear suspension toe-in and the rear suspension lower control arm, thereby improving handling stability.

[0040] In some embodiments, see Figure 2 The main frame features a left longitudinal beam stabilizer bracket 212 at the overlap between the front crossbeam 101 and the left longitudinal beam 103. This arrangement connects the stabilizer of the left longitudinal beam 103 to the main frame and also enhances the strength and rigidity of the rear subframe structure. Similarly, the main frame features a right longitudinal beam stabilizer bracket 213 at the overlap between the front crossbeam 101 and the right longitudinal beam 104. This arrangement also enhances the strength and rigidity of the rear subframe structure.

[0041] In some embodiments, see Figure 1 , Figure 2 Both the front and rear ends of the left longitudinal beam 103 and the right longitudinal beam 104 are bent outwards laterally, and sleeves 105 are provided at the ends. The sleeves 105 enable the installation of the rear subframe on the vehicle body. In this embodiment, by setting the sleeves 105 on the stronger left longitudinal beam 103 and right longitudinal beam 104, the strength and rigidity of the entire rear subframe and vehicle body can be effectively improved.

[0042] An embodiment of this utility model also provides a rear suspension assembly, including the rear subframe in any of the above embodiments.

[0043] An embodiment of this utility model also provides an automobile, including the rear suspension assembly of any of the above embodiments.

[0044] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A rear subframe, characterized in that, include: The main frame includes a front crossbeam, a rear crossbeam, a left longitudinal beam, and a right longitudinal beam. The front crossbeam, rear crossbeam, left longitudinal beam, and right longitudinal beam are all made of hollow tubing. The main frame forms a rear drive motor mounting space between the front crossbeam and the rear crossbeam. The middle of the left longitudinal beam and the right longitudinal beam bends upward. The main frame forms a drive shaft arrangement space below the bending position of the left longitudinal beam and the right longitudinal beam. The rear suspension mounting bracket is installed on the main frame.

2. The rear subframe according to claim 1, characterized in that, The rear suspension mounting bracket includes a rear suspension front lower control arm mounting bracket, a rear suspension front upper control arm mounting bracket, a rear suspension rear lower control arm mounting bracket, a rear suspension rear upper control arm mounting bracket, and a rear suspension toe-in tie rod mounting bracket.

3. The rear subframe according to claim 2, characterized in that, The rear suspension front lower control arm mounting bracket, the rear suspension front upper control arm mounting bracket, and the rear suspension rear upper control arm mounting bracket are symmetrically arranged on the left longitudinal beam and the right longitudinal beam.

4. The rear subframe according to claim 2, characterized in that, The rear lower control arm mounting bracket is located at the junction of the rear crossbeam and the left and right longitudinal beams.

5. The rear subframe according to claim 4, characterized in that, The rear lower control arm mounting bracket includes a first bracket plate and a second bracket plate, both of which are welded to the main frame. At least one of the first bracket plate and the second bracket plate has a folded edge. The first bracket plate and the second bracket plate overlap through the folded edge, forming a bracket cavity between the first bracket plate and the second bracket plate. The bracket cavity has a first mounting port for mounting the rear lower control arm.

6. The rear subframe according to claim 5, characterized in that, The rear suspension toe-in mounting bracket includes a third bracket plate, which is disposed on the back side of the second bracket plate, and a second mounting port for mounting the rear suspension toe-in is provided between the third bracket plate and the second bracket plate.

7. The rear subframe according to claim 1, characterized in that, The main frame is provided with a left longitudinal beam stabilizer bracket at the joint between the front crossbeam and the left longitudinal beam, and the main frame is provided with a right longitudinal beam stabilizer bracket at the joint between the front crossbeam and the right longitudinal beam.

8. The rear subframe according to claim 1, characterized in that, Both ends of the left and right longitudinal beams are bent outward in the transverse direction and sleeves are provided at the ends.

9. A rear suspension assembly, characterized in that, Includes the rear subframe as described in any one of claims 1 to 8.

10. A car, characterized in that, Includes the rear suspension assembly as described in claim 9.

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