Auxiliary frame assembly and vehicle
By designing a frame-type subframe assembly and utilizing arc-shaped outward expansion sections and energy-absorbing sections to form multiple energy-absorbing paths, the problem of poor energy absorption of the subframe assembly is solved, the collision energy absorption performance of the entire vehicle is improved, and production costs are reduced.
Patent Information
- Application Number
- CN202422473344.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-12
AI Technical Summary
In the prior art, the subframe assembly has a poor energy absorption effect, resulting in limited energy absorption of the entire vehicle under collision conditions, making it difficult to meet the collision requirements of the entire vehicle, while also increasing the complexity of the vehicle body structure design and production costs.
A frame-type subframe assembly is designed, comprising two crossbeams and two longitudinal beams. An arc-shaped expansion section is provided at the front end of the longitudinal beam to extend the length of the longitudinal beam. Combined with the energy absorption section and energy absorption box, multiple energy absorption paths are formed to improve the collision energy absorption performance of the vehicle and reduce the production cost of the vehicle body.
It improves the collision energy absorption performance of the entire vehicle, reduces the energy absorption demand of the vehicle body, reduces production costs, and improves the safety performance of the entire vehicle.
Smart Images
Figure CN223355700U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicles, and in particular relates to a subframe assembly and a vehicle. Background Art
[0002] During a car collision, passenger compartment deformation is directly related to occupant injury. Minimizing passenger compartment deformation to ensure occupant survival space improves vehicle safety. With the rapid development of the automotive industry, people are increasingly demanding vehicle safety, handling, and ride comfort.
[0003] As a chassis component, the subframe assembly provides mounting points for components such as the suspension arms, powertrain, and stabilizer bar. However, it is not very effective in absorbing energy during a collision. In a full-vehicle collision, the vehicle's energy-absorbing structure primarily absorbs the impact energy. However, relying solely on the body structure for energy absorption is limited and difficult to meet full-vehicle collision requirements. Furthermore, the high energy absorption required by the body requires a strong structural design, which increases vehicle production costs. Utility Model Content
[0004] The utility model provides a subframe assembly and a vehicle, aiming to at least solve the technical problem of poor energy absorption effect of the subframe assembly in the prior art.
[0005] In a first aspect of the implementation of the present invention, a subframe assembly is first provided, comprising: two cross beams, arranged relative to each other in the front-to-rear direction; a longitudinal beam, wherein the two cross beams are located between the two longitudinal beams, and the two ends of the cross beam are respectively connected to the two longitudinal beams, and the front end of the longitudinal beam is provided with an arc-shaped outward expansion section for connection to the vehicle body, and the two arc-shaped outward expansion sections expand outward from the rear to the front in a direction away from the cross beam.
[0006] Optionally, the two cross beams are respectively a front cross beam and a rear cross beam, the front cross beam includes a main body section and two energy absorbing sections, the two energy absorbing sections are respectively connected to the left and right ends of the main body section, and the cross-sectional dimensions of the energy absorbing sections are gradually expanded from the main body section toward the direction close to the longitudinal beam.
[0007] Optionally, the subframe assembly further includes a rear mounting bracket for supporting a rear swing arm, the rear cross beam is arranged corresponding to the rear mounting bracket, and the rear cross beam and the longitudinal beam are both connected to the rear mounting bracket.
[0008] Optionally, the subframe assembly further includes a reinforcing support, and the rear mounting bracket and the longitudinal beam are both connected to the reinforcing support; and / or, the rear mounting bracket is a box-shaped structure.
[0009] Optionally, the subframe assembly further includes a front mounting bracket for supporting a front swing arm, the front crossbeam is arranged corresponding to the front mounting bracket, and the front crossbeam and the longitudinal beam are both connected to the front mounting bracket.
[0010] Optionally, the front mounting bracket is a box-shaped structure.
[0011] Optionally, the longitudinal beam further includes a tail section and a curved and sunken section, wherein the sunken section is connected between the arc-shaped outward-expanding section and the tail section; and / or the cross-sectional size of the arc-shaped outward-expanding section gradually increases from rear to front.
[0012] Optionally, the subframe assembly further includes an energy absorption box for connecting to the vehicle body, and a front end baffle for connecting to the energy absorption box is provided at the front end of the arc-shaped outward expansion section, and the cross-sectional size of the front end baffle is larger than the cross-sectional size of the arc-shaped outward expansion section.
[0013] Optionally, the front end baffle is provided with a weight-reducing hole, and the edge of the weight-reducing hole is provided with a reinforcing flange.
[0014] In a second aspect of the implementation of the present invention, a vehicle is further provided. The vehicle includes a vehicle body and the subframe assembly as described above, wherein the vehicle body and the subframe assembly are connected.
[0015] Two crossbeams and two longitudinal beams form a frame-type subframe structure, which can increase the strength of the entire subframe assembly. Arc-shaped expansion sections are provided at the front ends of the two longitudinal beams for connection to the vehicle body. The arc-shaped expansion sections extend the left-right length of the longitudinal beams, allowing the longitudinal beams to expand outward to increase the overlap with the subframe assembly during small offset collisions. This allows energy to be transferred from the vehicle body to the subframe assembly during a collision. When the vehicle body energy is transferred to the arc-shaped expansion sections, the arc-shaped expansion sections can avoid stress concentration. The arc-shaped expansion structure can guide the overall deformation of the subframe assembly, improving the collision performance of the entire vehicle. The subframe assembly absorbs energy during a collision, providing another energy absorption path. The present invention utilizes the two crossbeams and two longitudinal beams to form a subframe assembly with greater structural strength. The arc-shaped expansion sections at the front ends of the longitudinal beams can also enhance the energy absorption of the subframe assembly, resulting in better collision performance for the entire vehicle. The vehicle body does not need to absorb all of the energy, which can reduce the production cost of the vehicle body.
[0016] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the drawings:
[0018] Figure 1 It is a structural schematic diagram of the subframe assembly described in the utility model;
[0019] Figure 2 It is a partial structural diagram of the auxiliary frame assembly described in the utility model.
[0020] Description of Reference Numerals
[0021] Name Label Name Label
[0022] 100 subframe assembly 21 arc-shaped expansion section
[0023] 1 beam 22 sinking section
[0024] 1a front crossbeam 23 tail section
[0025] 1b Rear cross member 3 rear mounting bracket
[0026] 11 Main section 4 reinforced support
[0027] 12 Energy absorption section 5 front mounting bracket
[0028] 2 longitudinal beams 6 front end baffles
[0029] 2a Left longitudinal beam 7 suspension bracket
[0030] 2b right longitudinal beam DETAILED DESCRIPTION
[0031] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.
[0032] A subframe assembly 100 according to the present invention will be described below with reference to the accompanying drawings. The subframe assembly 100 includes two crossbeams 1 and two longitudinal beams 2. The two crossbeams 1 are spaced relative to each other in the front-to-rear direction. The two crossbeams 1 are located between the two longitudinal beams 2, and the two ends of the crossbeam 1 are respectively connected to the two longitudinal beams 2. The front ends of the longitudinal beams 2 are provided with arc-shaped outward expansion sections 21 for connection to the vehicle body. The two arc-shaped outward expansion sections 21 expand outward in the left and right directions from rear to front.
[0033] like Figure 1As shown, the subframe assembly 100 in this embodiment includes two crossbeams 1 and two longitudinal beams 2, which can be overlapped and welded to form a frame-type subframe assembly 100. Both the crossbeams 1 and the longitudinal beams 2 in this embodiment can be steel structural members, which offer a high degree of freedom and high elongation. This significantly reduces production costs compared to aluminum structural members used in the prior art. The crossbeam 1 is formed by overlapping and welding an upper crossbeam piece and a lower crossbeam piece to form a hollow box structure, while the longitudinal beams 2 are formed by overlapping and welding an upper longitudinal beam piece and a lower longitudinal beam piece to form a hollow box structure. Furthermore, the upper crossbeam piece, the lower crossbeam piece, and the upper longitudinal beam piece and the lower longitudinal beam piece are all stamped integral parts, allowing assembly to be completed through subsequent welding. This reduces the number of machining processes required for the subframe assembly 100 in the prior art, thereby reducing production costs. In this embodiment, the two longitudinal beams 2 are respectively a left longitudinal beam 2a and a right longitudinal beam 2b. The left longitudinal beam 2a and the right longitudinal beam 2b are arranged opposite each other relative to the central axis of the subframe assembly 100. The left longitudinal beam 2a and the right longitudinal beam 2b have similar structures, with the right longitudinal beam 2b being C-shaped. Both longitudinal beams 2 are arranged with their front and rear ends flared. In one embodiment, the flared angle at the front end of the longitudinal beam 2 can be greater than the flared angle at the rear end of the longitudinal beam 2. Specifically, the flared angle at the front end and the flared angle at the rear end of the longitudinal beam 2 can be set according to actual use requirements and are not limited by the present invention.
[0034] In this embodiment, two crossbeams 1 and two longitudinal beams 2 are overlap-welded to form a frame-type subframe structure, which increases the strength of the overall subframe assembly 100. Curved outward expansion sections 21 are provided at the front ends of the two longitudinal beams 2 for connection to the vehicle body. These curved outward expansion sections 21 extend the left-right length of the longitudinal beams 2, allowing them to expand outward to increase the overlap with the subframe assembly 100 during small-offset collisions. This allows energy to be transferred from the vehicle body to the subframe assembly 100 during a collision. When energy from the vehicle body is transferred to the curved outward expansion sections 21, the curved design of the curved outward expansion sections 21 prevents stress concentration. The curved outward expansion structure guides the overall deformation of the subframe assembly 100, improving the overall collision performance of the vehicle. The subframe assembly 100 absorbs energy during a collision, providing another energy absorption path. In this embodiment, the two cross beams 1 and the two longitudinal beams 2 cooperate to form a subframe assembly 100 with relatively high structural strength. Furthermore, the arc-shaped outward expansion sections 21 at the front ends of the longitudinal beams 2 enhance the energy absorption effect of the subframe assembly 100, thereby improving the collision performance of the entire vehicle. The vehicle body does not need to absorb all of its energy, thereby reducing the production cost of the vehicle body.
[0035] In one embodiment, the two crossbeams 1 are a front crossbeam 1a and a rear crossbeam 1b. The front crossbeam 1a is located forward of the rear crossbeam 1b. The front crossbeam 1a includes a main section 11 and two energy-absorbing sections 12. The two energy-absorbing sections 12 are connected to the left and right ends of the main section 11, respectively. The cross-sectional dimensions of the energy-absorbing sections 12 gradually expand from the main section 11 toward the longitudinal beams 2. In this embodiment, the energy-absorbing sections 12 are provided at both ends of the front crossbeam 1a. The cross-sectional dimensions of the energy-absorbing sections 12 gradually increase from the main section 11 toward the longitudinal beams 2, thereby increasing the contact area between the front crossbeam 1a and the two longitudinal beams 2 and improving the structural strength of the front crossbeam 1a. The energy absorbed by the longitudinal beams 2 via the arc-shaped outward-flaring sections 21 is sequentially transferred and absorbed through one of the energy-absorbing sections 12, the main section 11, and the other energy-absorbing section 12.
[0036] In one embodiment, the subframe assembly 100 also includes a rear mounting bracket 3 for supporting the rear swinging arm. The rear crossbeam 1b is positioned corresponding to the rear mounting bracket 3. A rear mounting bracket 3 is provided at each left and right end of the rear crossbeam 1b, and both the rear crossbeam 1b and the longitudinal beam 2 are connected to the rear mounting bracket 3. By adding the rear mounting bracket 3 to the mounting point of the rear swinging arm, this embodiment supports the rear swinging arm during a collision and absorbs energy from the rear swinging arm, transferring this energy to the subframe assembly 100, further enhancing the subframe assembly's energy absorption capabilities. The simultaneous connection of the rear mounting bracket 3 to the rear crossbeam 1b and the longitudinal beam 2 enhances the structural strength of the subframe assembly 100.
[0037] As can be understood, a suspension bracket 7 for connecting the suspension is welded to the rear crossbeam 1b. The suspension bracket 7 can be welded to the crossbeam upper piece and includes a main vertical plate and reinforcing triangle plates connected to the front and rear sides of the main vertical plate. The main vertical plate is connected to the crossbeam upper piece, and the reinforcing triangle plates are connected to the crossbeam upper piece on one side and to the main vertical plate on the other side, which can improve the structural strength of the suspension bracket 7.
[0038] Specifically, if Figure 2 As shown, the subframe assembly 100 also includes a reinforcing support 4, to which the rear mounting bracket 3 and the longitudinal beam 2 are connected. The rear mounting bracket 3 is a box-shaped structure. This embodiment improves the connection strength between the rear mounting bracket 3 and the longitudinal beam 2 by adding the reinforcing support 4 between the longitudinal beam 2 and the rear mounting bracket 3. The reinforcing support 4 also supports the rear mounting bracket 3 during a collision, improving the stability of the rear mounting bracket 3's support of the rear swingarm.
[0039] like Figure 1As shown, the subframe assembly 100 also includes a front mounting bracket 5 for supporting the front swinging arm. The front crossbeam 1a is mounted in front of the corresponding bracket 5. A front mounting bracket 5 is provided on both the left and right sides of the front crossbeam 1a, and the front crossbeam 1a and the longitudinal beam 2 are both connected to the front mounting bracket 5. In this embodiment, the front mounting bracket 5 not only mounts the front swinging arm but also supports it. The front crossbeam 1a and the longitudinal beam 2 are both connected to the front mounting bracket 5, which can improve the connection strength of the subframe assembly 100.
[0040] It should be noted that the front mounting bracket 5 is a box-shaped structure. The rear mounting bracket 3 in this embodiment has the same structure as the front mounting bracket 5, both of which are integral box-shaped structures. To increase the rigidity of the swing arm mounting point, they may include a connected top plate, side plates, front plate, and rear plate to form an open box with openings on the outside and bottom, through which the swing arm can extend into the front mounting bracket 5 and the rear mounting bracket 3. The top plate of the rear mounting bracket 3 can be connected to the longitudinal beam 2, and the rear plate can be connected to the rear crossbeam 1b. The reinforcing support 4 can be an L-shaped support plate, with one side of the reinforcing support 4 connected to the rear plate and the other side connected to the lower piece of the longitudinal beam. The front plate and the rear plate may be provided with mounting holes connected to the swing arm structure. Supporting the swing arm through the box-shaped structure can improve the supporting effect of the front mounting bracket 5 and the rear mounting bracket 3. The left front end of the left longitudinal beam 2a is connected to a front mounting bracket 5, and the rear end is connected to a rear mounting bracket 3. The right front end of the right longitudinal beam 2b is connected to a front mounting bracket 5, and the rear end is connected to a rear mounting bracket 3. The two front mounting brackets 5 and the two rear mounting brackets 3 are used to install the swing arm structure and can also serve as a supporting structure to support the swing arm.
[0041] It should be noted that the longitudinal beam 2 also includes a tail section 23 and a curved, sunken section 22. The sunken section 22 connects the arc-shaped, outward-flaring section 21 and the tail section 23. The cross-sectional dimensions of the arc-shaped, outward-flaring section 21 gradually increase from rear to front. In this embodiment, the middle portion of the longitudinal beam 2 is bent downward to form the sunken section 22, which is located between the front crossbeam 1a and the rear crossbeam 1b. When the longitudinal beam 2 is impacted, the sunken section 22 is induced to deform and absorb energy, causing the middle portion of the longitudinal beam 2 to bend and deform to absorb energy. This guides the overall deformation of the subframe assembly 100, further enhancing the subframe assembly's energy absorption.
[0042] Specifically, the subframe assembly 100 also includes an energy absorption box for connection to the vehicle body. A front baffle 6 for connection to the energy absorption box is provided at the front end of the arcuate outward expansion section 21. The cross-sectional dimensions of the front baffle 6 are larger than those of the arcuate outward expansion section 21. The energy absorption box in this embodiment can be made of aluminum or other energy-absorbing metal components. The energy absorption box and the subframe assembly 100 in this embodiment are detachably connected, facilitating subsequent repair and replacement of subframe assembly 100 components. This avoids the need to replace the entire subframe assembly 100 due to damage to the energy absorption box, thereby reducing the cost of subframe assembly 100 maintenance.
[0043] In this embodiment, the front fender 6 is detachably connected to the energy absorption box via bolts, screws, and other fasteners. The cross-sectional dimensions of the front fender 6 are larger than those of the arcuate outwardly flared section 21, ensuring contact area between the front fender 6 and the energy absorption box, allowing energy absorbed by the energy absorption box to be effectively transferred to the longitudinal beam 2. The outwardly flared structure at the front end of the longitudinal beam 2 is connected to the energy absorption box. During a collision, energy can be transferred from the energy absorption box structure to the subframe assembly 100. This allows the front end energy absorption box, the longitudinal beam 2, and the cross member 1 to participate in collision energy absorption, thereby improving the overall vehicle's collision performance.
[0044] In one embodiment, the front baffle 6 is provided with a weight-reducing hole, the edges of which are provided with a reinforcing flange. The weight-reducing hole in this embodiment can be provided in the middle of the front baffle 6 to reduce the weight of the baffle. The reinforcing flange is bent backward to strengthen the edge of the weight-reducing hole, thereby preventing deformation of the front baffle 6 caused by energy absorption by the energy absorption box, thereby achieving both lightweight and high strength of the front baffle 6.
[0045] In this embodiment, the front ends of the two longitudinal beams 2 are designed to be outwardly expanded, and the middle portion of the longitudinal beams 2 is sunken. In the event of a small offset collision, the overlap between the barrier and the subframe assembly 100 can be increased. When the entire vehicle collides, the front energy absorption box and the subframe assembly 100 can both participate in collision energy absorption, thereby improving the collision performance of the entire vehicle. The energy absorption box and the subframe assembly 100 become the second and third energy absorption paths for the entire vehicle, forming three energy absorption paths in conjunction with the vehicle body, thereby improving the collision performance of the entire vehicle.
[0046] This embodiment further provides a vehicle, which includes a vehicle body and the above subframe assembly 100 , wherein the vehicle body and the subframe assembly 100 are connected.
[0047] The subframe assembly 100 includes two crossbeams 1 and two longitudinal beams 2. The two crossbeams 1 are arranged relative to each other in the front-to-back direction. The two crossbeams 1 are located between the two longitudinal beams 2, and the two ends of the crossbeam 1 are respectively connected to the two longitudinal beams 2. The front ends of the longitudinal beams 2 are provided with arc-shaped outward expansion sections 21 for connecting to the vehicle body. The two arc-shaped outward expansion sections 21 expand outward from the rear to the front in a direction away from the crossbeam 1.
[0048] The subframe assembly 100 includes two crossbeams 1 and two longitudinal beams 2, which can be overlap-welded to form a frame-type subframe assembly 100. In this embodiment, both the crossbeams 1 and the longitudinal beams 2 can be constructed from steel components, offering superior flexibility and high elongation. This significantly reduces production costs compared to aluminum components used in the prior art. The crossbeam 1 is constructed by overlapping and welding an upper crossbeam piece and a lower crossbeam piece, while the longitudinal beam 2 is constructed by overlapping and welding an upper longitudinal beam piece and a lower longitudinal beam piece. The upper crossbeam piece, the lower crossbeam piece, and the longitudinal beam piece are all stamped integral components. Assembly can be completed through subsequent welding, reducing the number of machining processes typically required for the subframe assembly 100 and lowering production costs. In this embodiment, the two longitudinal beams 2 are a left longitudinal beam 2a and a right longitudinal beam 2b, respectively. The left and right longitudinal beams 2a and 2b are disposed opposite each other relative to the central axis of the subframe assembly 100. The left and right longitudinal beams 2a and 2b have similar structures, with the right longitudinal beam 2b being C-shaped.
[0049] In this embodiment, two crossbeams 1 and two longitudinal beams 2 are overlap-welded to form a frame-type subframe structure, which increases the strength of the overall subframe assembly 100. Curved outward expansion sections 21 are provided at the front ends of the two longitudinal beams 2 for connection to the vehicle body. These curved outward expansion sections 21 extend the left-right length of the longitudinal beams 2, allowing them to expand outward to increase the overlap with the subframe assembly 100 during small-offset collisions. This allows energy to be transferred from the vehicle body to the subframe assembly 100 during a collision. When energy from the vehicle body is transferred to the curved outward expansion sections 21, the curved design of the curved outward expansion sections 21 prevents stress concentration. The curved outward expansion structure guides the overall deformation of the subframe assembly 100, improving the overall collision performance of the vehicle. The subframe assembly 100 absorbs energy during a collision, providing another energy absorption path. In this embodiment, the two cross beams 1 and the two longitudinal beams 2 cooperate to form a subframe assembly 100 with relatively high structural strength. Furthermore, the arc-shaped outward expansion sections 21 at the front ends of the longitudinal beams 2 enhance the energy absorption effect of the subframe assembly 100, thereby improving the collision performance of the entire vehicle. The vehicle body does not need to absorb all of its energy, thereby reducing the production cost of the vehicle body.
[0050] In one embodiment, the two crossbeams 1 are a front crossbeam 1a and a rear crossbeam 1b. The subframe assembly 100 also includes a rear mounting bracket 3 for supporting the rear swing arm. The rear mounting bracket 3 is positioned corresponding to the rear crossbeam 1b and is connected to both the rear crossbeam 1b and the longitudinal beam 2. This embodiment adds the rear mounting bracket 3 to the rear swing arm's mounting point. This supports the rear swing arm during a collision and absorbs energy from the rear swing arm, transferring it to the subframe assembly 100, further enhancing its energy absorption. The simultaneous connection of the rear mounting bracket 3 to the rear crossbeam 1b and the longitudinal beam 2 enhances the structural strength of the subframe assembly 100.
[0051] As can be understood, a suspension bracket 7 for connecting the suspension is welded to the rear crossbeam 1b. The suspension bracket 7 can be welded to the crossbeam upper piece and includes a main vertical plate and reinforcing triangle plates connected to the front and rear sides of the main vertical plate. The main vertical plate is connected to the crossbeam upper piece, and the reinforcing triangle plates are connected to the crossbeam upper piece on one side and to the main vertical plate on the other side, which can improve the structural strength of the suspension bracket 7.
[0052] Specifically, if Figure 2 As shown, the subframe assembly 100 also includes a reinforcing support 4, to which the rear mounting bracket 3 and the longitudinal beam 2 are connected. The rear mounting bracket 3 is a box-shaped structure. This embodiment improves the connection strength between the rear mounting bracket 3 and the longitudinal beam 2 by adding the reinforcing support 4 between the longitudinal beam 2 and the rear mounting bracket 3. The reinforcing support 4 also supports the rear mounting bracket 3 during a collision, improving the stability of the rear mounting bracket 3's support of the rear swingarm.
[0053] like Figure 1 As shown, the subframe assembly 100 further includes a front mounting bracket 5 for supporting the front swinging arm. The front mounting bracket 5 is provided corresponding to the front crossbeam 1a, and the front crossbeam 1a and the longitudinal beam 2 are both connected to the front mounting bracket 5. In this embodiment, the front mounting bracket 5 not only mounts the front swinging arm but also supports it. The front crossbeam 1a and the longitudinal beam 2 are both connected to the front mounting bracket 5, which can improve the connection strength of the subframe assembly 100.
[0054] It should be noted that the front mounting bracket 5 is a box-shaped structure. The rear mounting bracket 3 in this embodiment has the same structure as the front mounting bracket 5, both of which are integral box-shaped structures. To increase the rigidity of the swing arm mounting point, they may include a connected top plate, side plates, front plate, and rear plate to form an open box with openings on the outside and bottom, through which the swing arm can extend into the front mounting bracket 5 and the rear mounting bracket 3. The top plate of the rear mounting bracket 3 can be connected to the longitudinal beam 2, and the rear plate can be connected to the rear crossbeam 1b. The reinforcing support 4 can be an L-shaped support plate, with one side of the reinforcing support 4 connected to the rear plate and the other side connected to the lower piece of the longitudinal beam. The front plate and the rear plate may be provided with mounting holes connected to the swing arm structure. Supporting the swing arm through the box-shaped structure can improve the supporting effect of the front mounting bracket 5 and the rear mounting bracket 3. The left front end of the left longitudinal beam 2a is connected to a front mounting bracket 5, and the rear end is connected to a rear mounting bracket 3. The right front end of the right longitudinal beam 2b is connected to a front mounting bracket 5, and the rear end is connected to a rear mounting bracket 3. The two front mounting brackets 5 and the two rear mounting brackets 3 are used to install the swing arm structure and can also serve as a supporting structure to support the swing arm.
[0055] In one embodiment, the front crossbeam 1a includes a main section 11 and two energy-absorbing sections 12, each connected to the left and right ends of the main section 11. The cross-sectional dimensions of the energy-absorbing sections 12 gradually expand from the main section 11 toward the longitudinal beams 2. In this embodiment, the front crossbeam 1a is provided with energy-absorbing sections 12 at both ends. The cross-sectional dimensions of the energy-absorbing sections 12 gradually increase from the main section 11 toward the longitudinal beams 2, thereby increasing the contact area between the front crossbeam 1a and the two longitudinal beams 2 while also enhancing the structural strength of the front crossbeam 1a.
[0056] It should be noted that the longitudinal beam 2 also includes a tail section 23 and a curved, sunken section 22. The sunken section 22 connects the arc-shaped, outward-flaring section 21 and the tail section 23. The cross-sectional dimensions of the arc-shaped, outward-flaring section 21 gradually increase from rear to front. In this embodiment, the middle portion of the longitudinal beam 2 is bent downward to form the sunken section 22, which is located between the front crossbeam 1a and the rear crossbeam 1b. When the longitudinal beam 2 is impacted, the sunken section 22 is induced to deform and absorb energy, causing the middle portion of the longitudinal beam 2 to bend and deform to absorb energy. This guides the overall deformation of the subframe assembly 100, further enhancing the subframe assembly's energy absorption.
[0057] Specifically, the subframe assembly 100 also includes an energy absorption box for connection to the vehicle body. A front baffle 6 for connection to the energy absorption box is provided at the front end of the arcuate outward expansion section 21. The cross-sectional dimensions of the front baffle 6 are larger than those of the arcuate outward expansion section 21. The energy absorption box in this embodiment can be made of aluminum or other energy-absorbing metal components. The energy absorption box and the subframe assembly 100 in this embodiment are detachably connected, facilitating subsequent repair and replacement of subframe assembly 100 components. This avoids the need to replace the entire subframe assembly 100 due to damage to the energy absorption box, thereby reducing the cost of subframe assembly 100 maintenance.
[0058] The front end fender 6 of this embodiment is detachably connected to the energy absorption box via bolts, screws, and other connectors. The cross-sectional dimensions of the front end fender 6 are larger than those of the arcuate outwardly flared section 21, ensuring that the projection of the front end fender 6 onto the arcuate outwardly flared section 21 completely covers the arcuate outwardly flared section 21. This ensures contact area between the front end fender 6 and the energy absorption box, effectively transferring energy absorbed by the energy absorption box to the longitudinal beam 2. The outwardly flared structure at the front end of the longitudinal beam 2 is connected to an energy absorption box. During a collision, energy can be transferred from the energy absorption box structure to the subframe assembly 100. This allows the energy absorption box, longitudinal beam 2, and cross beam 1 at the front end of the vehicle to participate in collision energy absorption, thereby improving the overall vehicle's collision performance.
[0059] In one embodiment, the front baffle 6 is provided with a weight-reducing hole, the edges of which are provided with a reinforcing flange. The weight-reducing hole in this embodiment can be provided in the middle of the front baffle 6 to reduce the weight of the baffle. The reinforcing flange is bent backward to strengthen the edge of the weight-reducing hole, thereby preventing deformation of the front baffle 6 caused by energy absorption by the energy absorption box, thereby achieving both lightweight and high strength of the front baffle 6.
[0060] In this embodiment, the front ends of the two longitudinal beams 2 are designed to be outwardly expanded, and the middle portion of the longitudinal beams 2 is sunken. In the event of a small offset collision, the overlap between the barrier and the subframe assembly 100 can be increased. When the entire vehicle collides, the front energy absorption box and the subframe assembly 100 can both participate in collision energy absorption, thereby improving the collision performance of the entire vehicle. The energy absorption box and the subframe assembly 100 become the second and third energy absorption paths for the entire vehicle, forming three energy absorption paths in conjunction with the vehicle body, thereby improving the collision performance of the entire vehicle.
[0061] It should be noted that in the present invention, unless otherwise specified, directional words such as "up" and "down" generally refer to the up and down directions when the vehicle is in use, "front and back" generally refer to the front and rear directions when the vehicle is in use, "inside" refers to the direction close to the hollow cavity of the subframe assembly, and "outside" refers to the direction away from the hollow cavity of the subframe assembly.
[0062] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0063] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.
[0065] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A subframe assembly, characterized in that: The subframe assembly includes: Two crossbeams are arranged relatively spaced apart in the front-to-rear direction; Longitudinal beams, the two cross beams are located between the two longitudinal beams, and the two ends of the cross beam are respectively connected to the two longitudinal beams, and the front end of the longitudinal beam is provided with an arc-shaped outward expansion section for connecting with the vehicle body, and the two arc-shaped outward expansion sections expand outward from rear to front and left and right; The two cross beams are respectively a front cross beam and a rear cross beam. The front cross beam includes a main body section and two energy absorbing sections. The two energy absorbing sections are respectively connected to the left and right ends of the main body section. The cross-sectional dimensions of the energy absorbing sections are gradually expanded from the main body section toward the longitudinal beam.
2. The subframe assembly according to claim 1, characterized in that: The subframe assembly further includes a rear mounting bracket for supporting a rear swing arm, the rear cross beam is arranged corresponding to the rear mounting bracket, and the rear cross beam and the longitudinal beam are both connected to the rear mounting bracket.
3. The subframe assembly according to claim 2, characterized in that: The subframe assembly further includes a reinforcement support, and the rear mounting bracket and the longitudinal beam are both connected to the reinforcement support; and / or, The rear mounting bracket is a box-shaped structure.
4. The subframe assembly according to claim 1, characterized in that: The subframe assembly further includes a front mounting bracket for supporting a front swing arm, the front crossbeam is arranged corresponding to the front mounting bracket, and the front crossbeam and the longitudinal beam are both connected to the front mounting bracket.
5. The subframe assembly according to claim 4, characterized in that: The front mounting bracket is a box-shaped structure.
6. The subframe assembly according to any one of claims 1 to 5, characterized in that: The longitudinal beam further includes a tail section and a bent and sunken section, wherein the sunken section is connected between the arc-shaped outward expansion section and the tail section; and / or, The cross-sectional size of the arc-shaped outward expansion section gradually increases from the back to the front.
7. The subframe assembly according to any one of claims 1 to 5, characterized in that: The subframe assembly also includes an energy absorption box for connecting to the vehicle body. A front end baffle for connecting to the energy absorption box is provided at the front end of the arc-shaped outward expansion section, and the cross-sectional size of the front end baffle is larger than the cross-sectional size of the arc-shaped outward expansion section.
8. The subframe assembly according to claim 7, characterized in that: The front end baffle is provided with a weight-reducing hole, and the edge of the weight-reducing hole is provided with a reinforcing flange.
9. A vehicle, characterized in that: The vehicle includes a vehicle body and the subframe assembly according to any one of claims 1 to 8, wherein the vehicle body and the subframe assembly are connected.