Front subframe structure and automobile

Abstract

The utility model discloses a front subframe structure and car, include: front subframe, the front subframe is through crossbeam and longitudinal beam and forms full frame type subframe, motor installation suspension, including left front suspension, right front suspension and rear suspension, left front suspension, right front suspension symmetry sets up in the longitudinal beam front end of front subframe, rear suspension sets up in the rear longitudinal beam of front subframe, compressor installation support, along the height direction erects in the upper of left front suspension or right front suspension, and is connected in the longitudinal beam front end of front subframe. Left and right front suspension is arranged on the both sides of drive motor and is arranged in the longitudinal beam front end of subframe, can maximize the left and right rigidity of suspension system and promote the performance of operation and stability, and effectively promotes the performance of operation and stability, and the suspension system fully considers the extrusion space of collision, guarantees the performance of collision. Air conditioner compressor arrangement mode, compact structure, for the space of energy absorption of collapse before collision, and the arrangement position of compressor guarantees the excellent NV performance.

Description

Technical Field

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

[0002] The front subframe, a crucial component of the vehicle, is mounted at the bottom of the front engine compartment. In front-wheel-drive electric vehicles, the drive motor is typically mounted on the front subframe via a suspension mount. The front subframe and suspension mount together form a system that supports the drive motor, while also isolating it from vibration and controlling its sway. Therefore, the subframe and suspension mount system influence the vehicle's handling, NVH (noise, vibration, and harshness), and impacts its crash performance.

[0003] The placement of the air conditioning compressor in an electric vehicle affects the vehicle's NVH performance and engine compartment layout. In existing technologies, the air conditioning compressor is commonly placed on the longitudinal beams of the vehicle body. This placement may lead to the risk of resonance from multiple components, and the compressor's NVH performance may be reduced under certain operating conditions. On the other hand, placing it on the subframe would encroach on the space of the subframe.

[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 at least solve one of the technical problems existing in the prior art, and to provide a front subframe structure and an automobile.

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

[0007] Firstly, a front subframe structure includes:

[0008] A front subframe, wherein the front subframe is formed into a full-frame subframe by crossbeams and longitudinal beams;

[0009] The motor mounting brackets include a left front bracket, a right front bracket, and a rear bracket. The left front bracket and the right front bracket are symmetrically arranged at the front end of the longitudinal beam of the front subframe, and the rear bracket is arranged at the rear longitudinal beam of the front subframe.

[0010] The compressor mounting bracket is erected along the height direction above the left or right front suspension and connected to the front end of the longitudinal beam of the front subframe.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the front end of the longitudinal beam of the front subframe is provided with a front bracket and a rear bracket on the front and rear sides of the left front mount or the right front mount, the compressor mounting bracket includes a first support leg and a second support leg, the first support leg is connected to the front bracket, the second support leg is connected to the rear bracket, and a mounting space for setting the left front mount or the right front mount is formed between the front bracket and the rear bracket below the compressor mounting bracket.

[0012] In combination with the first aspect and the above-described implementation, some implementations of the first aspect further include a compressor. A first support rib and a second support rib that are raised upward are provided between the first support leg and the second support leg. A compressor assembly space is formed between the first support rib and the second support rib. The compressor is assembled in the compressor assembly space and is connected to the first support rib and the second support rib by fasteners.

[0013] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the first support rib and the second support rib are provided with multiple pairs of bolt holes facing each other, and the bottom of the compressor is provided with through connection holes corresponding to the bolt holes. The compressor is installed on the first support rib and the second support rib by bolts provided in the bolt holes and through connection holes.

[0014] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, a first vibration isolation pad is provided between the first support leg and the front bracket, and a second vibration isolation pad is provided between the second support leg and the rear bracket.

[0015] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, both the left front mount and the right front mount include a front mount bracket and a front mount bushing disposed on the front mount bracket. The front mount bracket is bolted to the front end of the longitudinal beam of the front subframe. The rear longitudinal beam of the front subframe is provided with a rear mount mounting bracket. The rear mount includes a rear mount bracket and a rear mount bushing disposed on the rear mount bracket. The rear mount bracket is bolted to the rear mount bracket through the rear mount bushing.

[0016] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the longitudinal beam includes an upper longitudinal beam plate and a lower longitudinal beam plate, the upper longitudinal beam plate and the lower longitudinal beam plate extend longitudinally, at least one of the edges of the upper longitudinal beam plate and the lower longitudinal beam plate is provided with a folded edge, the upper longitudinal beam plate and the lower longitudinal beam plate are welded through the folded edge to form a box-shaped structure with an inner cavity, and the middle position of the upper longitudinal beam plate is provided with a corner fold line to form a concave area.

[0017] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the upper plate of the longitudinal beam is provided with a front inclined surface, a bottom plane and a rear inclined surface in the concave region. The top surface of the upper plate of the longitudinal beam located on the front side of the concave region extends downward at an incline to the bottom plane through the front inclined surface, and a first corner line is formed between the front inclined surface and the bottom plane. The top surface of the upper plate of the longitudinal beam located on the rear side of the concave region extends downward at an incline to the bottom plane through the rear inclined surface, and a second corner line is formed between the rear inclined surface and the bottom plane.

[0018] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, a reinforcing bracket is provided inside the box-shaped structure behind the recessed area, the lower end of the reinforcing bracket is welded to the lower plate of the longitudinal beam, and the upper end of the reinforcing bracket is welded to the upper plate of the longitudinal beam.

[0019] Second, an automobile comprising the front subframe structure described in any implementation of the first aspect.

[0020] One of the above technical solutions has at least one of the following advantages or beneficial effects:

[0021] On the one hand, fixing the left and right front suspension mounts to the left and right side longitudinal beams of the front subframe provides excellent collision protection, handling stability, and NVH performance. Mounting the mounts on the longitudinal beams prevents them from being compressed before the beams during a collision, which helps control the collision deformation mode. Furthermore, the mounting arrangement on the left and right side longitudinal beams increases the lateral span of the drive motor, improving the lateral rigidity of the suspension system and enhancing overall vehicle handling performance. Simultaneously, the front ends of the longitudinal beams are at the modal nodes of the frame subframe; positioning the left and right front suspension mounts at the front of the longitudinal beams minimizes the additional load on the mounts and improves vibration isolation transmission performance.

[0022] On the other hand, placing the air conditioning compressor on the front subframe effectively isolates compressor vibration and prevents resonance of multiple components. Furthermore, the front end of the longitudinal beam is at the modal node of the full-frame subframe, which has high rigidity and minimizes the transmission of compressor vibration, thus improving NVH performance. The air conditioning compressor is mounted on the right front suspension via a bracket, which is compact and makes full use of space, thus helping to compress the space in the overall collision.

[0023] 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

[0024] 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:

[0025] Figure 1 This is a schematic diagram of an embodiment of the front subframe structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the compressor mounting structure of an embodiment of the front subframe structure of this utility model;

[0027] Figure 3 This is an isometric view of the structure after the motor and compressor are installed in an embodiment of the front subframe structure of this utility model;

[0028] Figure 4This is a side view of the front subframe structure of this utility model after the motor and compressor are installed, representing an embodiment of the structure.

[0029] Figure 5 This is a schematic diagram of an embodiment of the front subframe of this utility model;

[0030] Figure 6 This is a schematic diagram of a reinforced support structure of an embodiment of the front subframe of this utility model. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] See Figures 1-4This utility model provides a front subframe structure, including a front subframe 100, a motor mounting mount, and a compressor mounting bracket 200. The front subframe 100 forms a full-frame subframe through a crossbeam 101 and a longitudinal beam 102, and the full-frame subframe is U-shaped. The motor mounting mount is used to mount the drive motor to the front subframe 100. The motor mounting mount includes a left front mount 301, a right front mount 302, and a rear mount 303. The left front mount 301 and the right front mount 302 are symmetrically arranged at the front end of the longitudinal beam 102 of the front subframe 100, and the rear mount 303 is arranged at the rear longitudinal beam 102 of the front subframe 100.

[0037] The compressor mounting bracket 200 is mounted on the left front suspension 301 or the right front suspension 302 along the height direction and is connected to the front end of the longitudinal beam 102 of the front subframe 100.

[0038] See Figures 1-4 On the one hand, the embodiments of this utility model fix the left front suspension 301 and the right front suspension 302 to the left and right side longitudinal beams 102 of the front subframe 100, which has excellent collision protection, handling stability, and NV performance. Suspension on the longitudinal beams 102 prevents them from being compressed before the longitudinal beams 102 in a collision, which is beneficial for controlling the collision deformation mode. Moreover, the suspension arrangement on the left and right side longitudinal beams 102 increases the left and right span of the drive motor, improving the left and right rigidity of the suspension system, which is beneficial for improving the overall vehicle handling performance. At the same time, the front end of the longitudinal beams 102 is the modal node of the frame subframe, and the left and right front suspensions 302 are arranged at the front end of the longitudinal beams 102, which can minimize the additional load on the suspensions and improve vibration isolation transmission performance.

[0039] On the other hand, in this embodiment of the invention, the air conditioning compressor is arranged on the front subframe 100, effectively isolating the air conditioning compressor vibration and avoiding resonance of multiple components. Furthermore, the front end of the longitudinal beam 102 is at the modal node of the full-frame subframe, which has high rigidity, minimizing the transmission of compressor vibration and improving NVH performance; the air conditioning compressor is arranged above the right front suspension 302 via a bracket, which is compact and makes full use of space, which is conducive to compressing the space in the overall collision.

[0040] See Figures 1-5The front end of the longitudinal beam 102 of the front subframe 100 is provided with a front bracket 103 and a rear bracket 104 on both the front and rear sides of the left front suspension 301 or the right front suspension 302. The front bracket 103 and the rear bracket 104 are welded to the front subframe 100. The compressor mounting bracket 200 includes a first support leg 201 and a second support leg 202. The first support leg 201 is connected to the front bracket 103, and the second support leg 202 is connected to the rear bracket 104. The compressor mounting bracket 200 is mounted in a bridge shape on the front bracket 103 and the rear bracket 104. A mounting space for the left front suspension 301 or the right front suspension 302 is formed between the front bracket 103 and the rear bracket 104 below the compressor mounting bracket 200. The air conditioning compressor is arranged above the left front suspension 301 or the right front suspension 302 through the bracket. The arrangement is compact, makes full use of space, and is conducive to compressing the space in the overall collision.

[0041] Furthermore, in some embodiments, see Figures 1-4 The front subframe structure also includes a compressor 400. A first support rib 203 and a second support rib 204, both upwardly raised, are provided between the first support leg 201 and the second support leg 202. The first support rib 203 and the second support rib 204 are arranged parallel to each other, with their tops extending longitudinally. A gap exists between the first support rib 203 and the second support rib 204, forming a compressor assembly space. The compressor 400 is assembled in this compressor assembly space and connected to the first support rib 203 and the second support rib 204 by fasteners. In this embodiment, the first support rib 203 and the second support rib 204 form the assembly space for mounting the compressor 400, resulting in better structural stability and effectively reducing the overall weight.

[0042] Further, see Figures 1-4 The first support rib 203 and the second support rib 204 are provided with multiple pairs of bolt holes facing each other. The bottom of the compressor 400 is provided with through-holes corresponding to the bolt holes. The compressor 400 is installed on the first support rib 203 and the second support rib 204 by bolts 205 provided in the bolt holes and through-holes. In this embodiment, the compressor 400 is assembled on the compressor mounting bracket 200 by multiple bolts 205 distributed longitudinally, which fully ensures the connection stability between the compressor 400 and the front subframe 100.

[0043] In some embodiments, a first vibration damping pad is provided between the first support leg 201 and the front bracket 103, and a second vibration damping pad is provided between the second support leg 202 and the rear bracket 104. In this embodiment, the compressor 400 is first placed on the front subframe 100 to reduce the transmission of compressor 400 vibration to the vehicle body. Then, by setting vibration damping pads, the transmission of compressor 400 vibration to the vehicle body is further reduced, forming a two-stage vibration damping effect that effectively isolates the vibration of the air conditioning compressor 400 and avoids resonance of multiple components.

[0044] In some embodiments, see Figure 1 , Figure 2 , Figure 3 The left front suspension 301 and right front suspension 302 both include a front suspension bracket 304 and a front suspension bushing 305 disposed on the front suspension bracket 304. The front suspension bushing 305 may be made of rubber. The front suspension bracket 304 is bolted to the front end of the longitudinal beam 102 of the front subframe 100. The rear longitudinal beam 102 of the front subframe 100 is provided with a rear suspension mounting bracket 105. The rear suspension 303 includes a rear suspension bracket 306 and a rear suspension bushing 307 disposed on the rear suspension bracket 306. The rear suspension bracket 306 is mounted to the rear suspension mounting bracket 105 by bolts passing through the rear suspension bushing 307. The front part of the drive motor 500 is bolted to the front suspension bushing 305 of the left front suspension 301 and right front suspension 302 respectively, and the rear part of the drive motor 500 is directly bolted to the rear suspension bracket 306. Under extreme collision conditions, the bolts can be set to shear off, allowing the front end of the motor to detach from the front subframe 100 and sink, avoiding direct compression of the vehicle's firewall and ensuring sufficient passenger space; the rear mount 303 is positioned below the drive motor 500, providing space for compression under collision conditions.

[0045] In some embodiments, see Figure 5 The longitudinal beam 102 includes an upper longitudinal beam plate 106 and a lower longitudinal beam plate 107. The upper longitudinal beam plate 106 and the lower longitudinal beam plate 107 extend longitudinally. At least one of the edges of the upper longitudinal beam plate 106 and the lower longitudinal beam plate 107 is provided with a folded edge 108. The upper longitudinal beam plate 106 and the lower longitudinal beam plate 107 are welded together through the folded edge 108 to form a box-shaped structure with an inner cavity. A recessed area 109 is formed in the middle of the upper longitudinal beam plate 106 by setting a corner fold line.

[0046] Since the rear point of the longitudinal beam 102 is the power battery pack, it is necessary to fix the rear point of the longitudinal beam 102 under collision conditions to ensure the safety of the power battery pack. Simultaneously, the drive motor 500 component located on the front subframe 100 must not intrude into the firewall or suffer leakage damage. In this technical solution, a recessed area 109 is formed in the middle of the upper plate 106 of the longitudinal beam by setting a corner bend. During a collision, the load is transferred from the vehicle body to the front end of the longitudinal beam 102, then through the longitudinal beam 102 to its rear point. During this process, the front point of the front subframe 100 collapses while the rear point remains intact. The front subframe 100 undergoes a V-shaped bending deformation in the recessed area 109, achieving a specific deformation mode to protect occupant safety. By setting the recessed area 109 formed by the corner bend, sufficient collision energy absorption is achieved, realizing the predetermined collision motor movement trajectory, reducing intrusion into the passenger compartment, significantly enhancing collision performance, protecting the battery pack from contact during a collision, and greatly improving collision safety requirements.

[0047] In some embodiments, see Figure 5 , Figure 6 The upper plate 106 of the longitudinal beam has a front inclined surface 110, a bottom plane 111, and a rear inclined surface 112 in the recessed area 109. The top surface of the upper plate 106 on the front side of the recessed area 109 extends downwards at an angle through the front inclined surface 110 to the bottom plane 111, forming a first corner fold line 113 between the front inclined surface 110 and the bottom plane 111. The top surface of the upper plate 106 on the rear side of the recessed area 109 extends downwards at an angle through the rear inclined surface 112 to the bottom plane 111, forming a second corner fold line 114 between the rear inclined surface 112 and the bottom plane 111. In this embodiment, the upper plate 106 of the longitudinal beam forms a double-bend area in the recessed area 109 through the first corner fold line 113 and the second corner fold line 114. The front subframe 100 can achieve a specific deformation mode under collision conditions to protect the safety of the occupants, achieve sufficient collision energy absorption, realize the predetermined collision motor movement trajectory, and reduce the intrusion into the cab.

[0048] In some embodiments, see Figure 6 Inside the box-shaped structure, a reinforcing bracket 115 is provided behind the recessed area 109. The lower end of the reinforcing bracket 115 is welded to the lower plate 107 of the longitudinal beam, and the upper end of the reinforcing bracket 115 is welded to the upper plate 106 of the longitudinal beam. This greatly improves the strength and rigidity of the subframe, providing excellent strength and durability, as well as superior NV performance. Furthermore, this design fully considers processing requirements and completely satisfies manufacturing and processing requirements.

[0049] An embodiment of this utility model also provides an automobile, including the front subframe structure of any of the above embodiments.

[0050] 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.

[0051] 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 front subframe structure, characterized in that, include: A front subframe, wherein the front subframe is formed into a full-frame subframe by crossbeams and longitudinal beams; The motor mounting brackets include a left front bracket, a right front bracket, and a rear bracket. The left front bracket and the right front bracket are symmetrically arranged at the front end of the longitudinal beam of the front subframe, and the rear bracket is arranged at the rear longitudinal beam of the front subframe. The compressor mounting bracket is erected along the height direction above the left or right front suspension and connected to the front end of the longitudinal beam of the front subframe.

2. The front subframe structure according to claim 1, characterized in that, The front end of the longitudinal beam of the front subframe is provided with a front bracket and a rear bracket on the front and rear sides of the left front mount or the right front mount. The compressor mounting bracket includes a first support leg and a second support leg. The first support leg is connected to the front bracket, and the second support leg is connected to the rear bracket. The compressor mounting bracket forms a mounting space for the left front mount or the right front mount between the front bracket and the rear bracket.

3. The front subframe structure according to claim 2, characterized in that, It also includes a compressor, and there is an upwardly raised first support rib and a second support rib between the first support leg and the second support leg. The first support rib and the second support rib form a compressor assembly space. The compressor is assembled in the compressor assembly space and is connected to the first support rib and the second support rib by fasteners.

4. The front subframe structure according to claim 3, characterized in that, The first support rib and the second support rib are provided with multiple pairs of bolt holes facing each other. The bottom of the compressor is provided with through connection holes corresponding to the bolt holes. The compressor is installed on the first support rib and the second support rib by bolts provided in the bolt holes and through connection holes.

5. The front subframe structure according to claim 2, characterized in that, A first vibration isolation pad is provided between the first support leg and the front bracket, and a second vibration isolation pad is provided between the second support leg and the rear bracket.

6. The front subframe structure according to claim 1, characterized in that, Both the left and right front suspensions include a front suspension bracket and a front suspension bushing disposed on the front suspension bracket. The front suspension bracket is bolted to the front end of the longitudinal beam of the front subframe. The rear longitudinal beam of the front subframe is provided with a rear suspension mounting bracket. The rear suspension includes a rear suspension bracket and a rear suspension bushing disposed on the rear suspension bracket. The rear suspension bracket is mounted to the rear suspension mounting bracket by bolts passing through the rear suspension bushing.

7. The front subframe structure according to claim 1, characterized in that, The longitudinal beam includes an upper longitudinal beam plate and a lower longitudinal beam plate, which extend longitudinally. At least one of the upper and lower longitudinal beam plates has a folded edge on its edge. The upper and lower longitudinal beam plates are welded together through the folded edge to form a box-shaped structure with an inner cavity. A recessed area is formed in the middle of the upper longitudinal beam plate by setting a corner fold line.

8. The front subframe structure according to claim 7, characterized in that, The upper plate of the longitudinal beam has a front inclined surface, a bottom plane and a rear inclined surface in the concave area. The top surface of the upper plate of the longitudinal beam located on the front side of the concave area extends downward to the bottom plane through the front inclined surface, forming a first corner line between the front inclined surface and the bottom plane. The top surface of the upper plate of the longitudinal beam located on the rear side of the concave area extends downward to the bottom plane through the rear inclined surface, forming a second corner line between the rear inclined surface and the bottom plane.

9. The front subframe structure according to claim 7, characterized in that, The box-shaped structure has a reinforcing bracket located behind the recessed area. The lower end of the reinforcing bracket is welded to the lower plate of the longitudinal beam, and the upper end of the reinforcing bracket is welded to the upper plate of the longitudinal beam.

10. A car, characterized in that, Includes the front subframe structure as described in any one of claims 1 to 9.

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