Front auxiliary frame and vehicle

Abstract

The front auxiliary frame comprises a plurality of pipe fittings, the pipe fittings are processed and configured to be longitudinal beams, front cross beams, middle cross beams and rear cross beams, the longitudinal beams extend in the front-back direction of the vehicle, the two longitudinal beams are arranged in parallel in a spaced mode, and the front cross beams are connected with the middle cross beams. The front cross beam, the middle cross beam and the rear cross beam are sequentially arranged at intervals in the front-back direction of a vehicle and are all connected with the two longitudinal beams, and at least one of the longitudinal beams, the front cross beam, the middle cross beam and the rear cross beam is provided with a vehicle body connecting piece. The longitudinal beams, the front cross beam, the middle cross beam and the rear cross beam which are formed by machining and configuring pipe fittings are used, the front cross beam, the middle cross beam and the rear cross beam are sequentially assembled on the two longitudinal beams which extend in the front-back direction and are arranged at intervals in the left-right direction in a front-back separation mode, and the vehicle body connecting piece is arranged on a frame formed by the beam bodies. The front auxiliary frame structure in the prior art is optimized, so that the development cost is reduced, and the expansibility is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile technical field, especially a front subframe and vehicle. BACKGROUND

[0002] The automobile front subframe is an important structural component for providing installation positions of stabilizer bar, steering machine, engine suspension and swing arm, etc. SUMMARY

[0003] The embodiment of the utility model provides a front subframe, aim at solving the prior art front subframe has the problem of lower expandability and larger development cost.

[0004] In the first aspect, the utility model provides a front subframe, include: a plurality of pipe fittings, pipe fittings processing configuration is longitudinal beam, front crossbeam, middle crossbeam, rear crossbeam, longitudinal beam extends along the front and back direction of vehicle, two longitudinal beam parallel interval arrangement, front crossbeam, middle crossbeam and rear crossbeam are sequentially spaced along the front and back direction of vehicle and all are connected with two longitudinal beam, at least one of longitudinal beam, front crossbeam, middle crossbeam and rear crossbeam is equipped with vehicle body connecting piece.

[0005] In the front subframe provided by the utility model, two through holes are arranged on the front crossbeam, and two longitudinal beams are respectively arranged in the two through holes.

[0006] In the front subframe provided by the utility model, the two ends of the middle crossbeam along the length direction of the middle crossbeam are respectively welded with two longitudinal beams.

[0007] The two ends of the rear crossbeam along the length direction of the rear crossbeam are respectively welded with two longitudinal beams.

[0008] In the front subframe provided by the utility model, the vehicle body connecting piece includes a vehicle body front mounting bracket and a vehicle body rear mounting bracket, the vehicle body front mounting bracket is arranged at the positions close to the left and right ends of the front crossbeam, and the vehicle body rear mounting bracket is arranged at the positions close to the rear ends of the longitudinal beams.

[0009] In the front subframe provided by the utility model, the vehicle body front mounting frame comprises first support bodies and first connecting parts, two first support bodies are arranged on the upper surfaces of the front cross beams near the left and right ends respectively, the two first connecting parts are arranged on the two first support bodies away from each other, and the first connecting parts are used for being connected with the vehicle body.

[0010] In the front subframe provided by the utility model, the vehicle body connecting piece further comprises a vehicle body middle mounting bracket, the vehicle body middle mounting bracket is detachably arranged on the longitudinal beam, and the vehicle body middle mounting bracket is arranged near the middle cross beam.

[0011] The vehicle body connecting piece further comprises a swing arm mounting bracket, the swing arm mounting bracket is arranged on the longitudinal beam near the middle cross beam, and the swing arm mounting bracket is connected with the vehicle body middle mounting bracket.

[0012] In the front subframe provided by the utility model, the vehicle body connecting piece further comprises a motor front suspension bracket and a motor rear suspension bracket, the motor front suspension bracket is arranged on the front cross beam, and the motor rear suspension bracket is arranged on the middle cross beam.

[0013] In the front subframe provided by the utility model, a first rib plate is further arranged, and the first rib plate is connected with the longitudinal beam, the middle cross beam and the rear cross beam.

[0014] In the front subframe provided by the utility model, the middle cross beam is provided with a flat pressing part at the connection position with the longitudinal beam, the contact edge of the flat pressing part extends along the length direction of the longitudinal beam, and the extension length of the contact edge is greater than the beam diameter of the middle cross beam.

[0015] In the second aspect, the utility model provides a vehicle comprising the above-mentioned front subframe.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] In the technical scheme of the utility model, the longitudinal beam, the front cross beam, the middle cross beam and the rear cross beam are configured by pipe fittings, the front cross beam, the middle cross beam and the rear cross beam are sequentially assembled on the two longitudinal beams arranged at intervals in the left-right direction, the vehicle body connecting piece is arranged on the frame formed by the beams, the front subframe structure of the prior art is optimized, the development cost is reduced, and the expandability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the drawings shown.

[0019] Figure 1 It is a three-dimensional schematic view of the front subframe of the embodiment of the present application.

[0020] Figure 2 It is a top view of the front subframe of the embodiment of the present application.

[0021] Figure 3 It is a sectional view A of the front subframe of the embodiment of the present application.

[0022] Figure 4 It is a sectional view B of the front subframe of the embodiment of the present application.

[0023] Figure 5 It is another three-dimensional schematic view of the structure of the front subframe of the embodiment of the present application.

[0024] Figure 6 It is an enlarged view C of the sectional view A of the front subframe of the embodiment of the present application.

[0025] Figure 7 It is an enlarged view D of the sectional view A of the front subframe of the embodiment of the present application.

[0026] Figure 8 It is an enlarged view E of the sectional view B of the front subframe of the embodiment of the present application.

[0027] Figure 9 It is an enlarged view F of another three-dimensional schematic view of the front subframe of the embodiment of the present application.

[0028] Figure 10 It is an enlarged view G of another three-dimensional schematic view of the front subframe of the embodiment of the present application.

[0029] Explanation of figure marks:

[0030] 1, longitudinal beam; 11, rear mounting bracket of vehicle body; 12, swing arm mounting support; 13, avoiding part;

[0031] 2, front cross beam; 21, front mounting bracket of vehicle body; 211, first support body; 212, first connecting part; 22, motor front suspension support; 23, second rib plate;

[0032] 3, middle cross beam; 31, middle mounting support of vehicle body; 33, motor rear suspension support; 34, flat pressing part; 35, first rib plate;

[0033] 4. Rear cross beam. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0035] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0036] The utility model provides a kind of front subframe, to solve the problem of lower expandability of existing front subframe, larger development cost. Figures 1 to 10 , the front subframe includes: multiple pipe fittings, the pipe fitting is processed and is configured into longitudinal beam 1, front cross beam 2, middle cross beam 3, rear cross beam 4, the longitudinal beam 1 extends along vehicle front-back direction, two the longitudinal beam 1 is arranged in parallel interval, the front cross beam 2, middle cross beam 3 and rear cross beam 4 are sequentially spaced along vehicle front-back direction and are all connected with two the longitudinal beam 1, at least one of longitudinal beam 1, front cross beam 2, middle cross beam 3 and rear cross beam 4 is equipped with body connecting piece.Said body connecting piece refers to each type of component on front subframe participating in body connection, including body front mounting frame, body rear mounting frame, body middle mounting bracket, swing arm mounting bracket motor front suspension bracket, motor rear suspension bracket, etc., and it will be different according to the type and demand of vehicle.The longitudinal beam 1 is used as the main load-bearing structure of front subframe, and it extends along the front-back direction of vehicle, mainly plays the role of load bearing, to ensure stability while taking into account the convenience of manufacture, two parallel longitudinal beams 1 are used in front subframe, to ensure the stability and safety of vehicle during driving. Figure 8 For example, in order to facilitate production and connection with other components on longitudinal beam 1, hollow pipe with circular cross section is used for longitudinal beam 1.The specific interval size of two longitudinal beams 1 will change according to the overall design of vehicle body.Three cross beams are arranged on two parallel longitudinal beams 1: front cross beam 2, middle cross beam 3 and rear cross beam 4, which are sequentially spaced along the front-back direction of vehicle, and are connected with two longitudinal beams 1 to form the main structure of front subframe.Front cross beam 2 is responsible for bearing the weight of motor, gearbox and front suspension system, and in the case of collision, front cross beam 2 can also absorb and disperse impact force to protect the safety of passenger compartment.Figure 6 For example, the front crossbeam 2 is a hollow tube with a rectangular cross-section. Since the bending section modulus of a rectangular tube is greater than that of a circular tube, using a rectangular tube for the front crossbeam 2 provides better bending resistance and improves its load-bearing capacity. Using a rectangular tube for the front crossbeam 2 also facilitates manufacturing and reduces production costs. The middle crossbeam 3 is located between the front crossbeam 2 and the rear crossbeam 4. Both ends of the middle crossbeam 3 are welded to the two longitudinal beams 1 along its length, and it shares the load of the motor with the front crossbeam 2. Simultaneously, the middle crossbeam 3 also distributes the overall stress, reducing local stress concentration. Figure 7 For example, to ensure the load-bearing capacity of the middle crossbeam 3 while facilitating production, the middle crossbeam 3 uses a hollow tube with a longitudinally arranged waist-shaped groove. The rear crossbeam 4 is welded to both ends of the two longitudinal beams 1 along its length. The rear crossbeam 4 connects to the rear suspension system to enhance the strength and rigidity of the entire structure, ensuring the stability and performance of the suspension system connected to the rear crossbeam 4. In the event of a collision, the rear crossbeam 4 can also help absorb some impact energy, protecting the safety of occupants and the vehicle. Therefore, to ensure the strength of the rear crossbeam 4 while facilitating production, the rear crossbeam 4 also uses a rectangular hollow tube. The front crossbeam 2, middle crossbeam 3, and rear crossbeam 4 are connected to the longitudinal beams 1 by welding to ensure the integrity of the entire structure. In this utility model, the longitudinal beams 1, front crossbeam 2, middle crossbeam 3, and rear crossbeam 4 all use prefabricated hollow tubes. These components are formed by hot rolling in one step, and then bent into tubes according to requirements, ultimately becoming the beams. The longitudinal beams 1, front crossbeam 2, middle crossbeam 3, and rear crossbeam 4, produced using prefabricated tubular components, exhibit superior tensile strength and toughness compared to existing beams manufactured through sheet metal pressing and welding. This enhances the overall load-bearing capacity and impact resistance of the vehicle frame. Furthermore, the shape and dimensions of the various beams supported by hot-rolled steel tubular components can be independently optimized based on mechanical analysis, better meeting the vehicle's stress requirements under different operating conditions and thus improving structural stability and safety.

[0037] Because the conventional process of the prior art is formed by a large stamping die, the large stamping die needs a large stamping equipment, and when the vehicle design changes, the corresponding die of the front subframe needs to be changed, and in the case that the die is difficult to change, a new die needs to be opened, which will cause great cost for the research and development and production of the vehicle. By prefabricating pipe fittings to manufacture various types of beam bodies, and then prefabricating small dies to manufacture various types of parts of the vehicle body connecting piece, and then welding to connect and fix the whole, the die cost and the size requirement of the stamping machine can be greatly reduced. In the same vehicle model, after the main beam body of the front subframe, i.e. the longitudinal beam 1, the front cross beam 2, the middle cross beam 3 and the rear cross beam 4 are connected and assembled, even if the design changes, as long as the size of the whole vehicle and the structure of the frame do not change greatly, only the die and the welding position of the vehicle body connecting piece on the front subframe need to be changed, so that the modification of the front subframe is easier. The various beam bodies made of prefabricated steel pipes can be customized according to the specific design requirements, which can flexibly respond to the requirements of different vehicle models and structures, meet the diversified market demand, and only need the upstream production line to supply prefabricated steel pipes, thereby optimizing the production process and supply chain, reducing the production cost and improving the production efficiency. Therefore, using the prefabricated steel hollow pipe as the basic profile of the longitudinal beam 1, the front cross beam 2, the middle cross beam 3 and the rear cross beam 4 of the front subframe can bring more economic benefits to the manufacturer.

[0038] Compared with the prior art, the longitudinal beam 1, the front cross beam 2, the middle cross beam 3 and the rear cross beam 4 are configured by pipe fittings, two longitudinal beams 1 are arranged in the front and rear direction, the front cross beam 2, the middle cross beam 3 and the rear cross beam 4 are sequentially assembled on the two longitudinal beams 1, and the vehicle body connecting piece is arranged on the frame formed by the beam bodies, so that the structure of the front subframe of the prior art is optimized, the development cost is reduced, and the expandability is improved.

[0039] In particular, two through holes are arranged on the front cross beam 2, and two longitudinal beams 1 are arranged in the through holes. In order to make the connection of the front cross beam 2 and the longitudinal beam 1 as the main bearing structure more stable, the two longitudinal beams 1 are arranged in the two through holes of the front cross beam 2 in the front and rear direction, and a closed ring-shaped welding seam is arranged at the position where the longitudinal beam 1 is connected to the front and rear sections of the through hole. By interpenetrating the front cross beam 2 and the longitudinal beam 1 to form a cross structure, the structure of the front subframe is more stable, and the bearing capacity is stronger.

[0040] In an embodiment, with reference to Figure 1 , Figure 2 and Figure 3The vehicle body connecting member includes a vehicle body front mounting bracket 21 and a vehicle body rear mounting bracket 11. The vehicle body front mounting bracket 21 is arranged near the left and right ends of the front cross beam 2, and the vehicle body rear mounting bracket 11 is arranged near the rear end of the longitudinal beam 1. The vehicle body front mounting bracket 21 is arranged near the left and right ends of the front cross beam 2 to provide a support and a connecting point between the front part of the front subframe and the vehicle body, thereby enhancing the structural strength and stability of the front part of the vehicle. The vehicle body front mounting bracket 21 is connected to the vehicle body by bolts. The vehicle body rear mounting bracket 11 is arranged near the rear end of the longitudinal beam 1 to provide a stable connecting point between the rear part of the front subframe and the vehicle body, thereby ensuring effective connection between the vehicle body and the frame and improving the overall rigidity of the vehicle body. The front subframe is connected to the vehicle body by the vehicle body front mounting bracket 21 and the vehicle body rear mounting bracket 11 to form a space frame structure, which has a more complete structural system than a planar structure, thereby not only enhancing stability but also improving safety performance during driving. At the same time, the connection between the front subframe and the vehicle body also enables the front subframe to maintain good deformation characteristics and strength when subjected to different loads and impacts. The vehicle body front mounting bracket 21 and the vehicle body rear mounting bracket 11 are connected to the front cross beam 2 and the longitudinal beam 1 by welding to ensure good connection strength.

[0041] In an embodiment, referring to Figure 1 , Figure 2 , Figure 5 and Figure 10 , the vehicle body front mounting bracket 21 includes a first support body 211 and a first connecting part 212. The two first support bodies 211 are arranged on the upper surfaces of the front cross beam 2 near the left and right ends, respectively, and the two first connecting parts 212 are arranged on the two first support bodies 211 away from each other. The first connecting part 212 is used for connecting with the vehicle body. The two first support bodies 211 are arranged on the upper surfaces of the front cross beam 2 near the left and right ends, respectively, and extend outward from the left and right ends of the front cross beam by a portion. The first support body 211 provides stable support, further enhancing the strength and rigidity of the front cross beam 2. The two first connecting parts 212 are arranged on the two first support bodies 211, respectively, and away from each other. The main function is to connect with the vehicle body to ensure stable connection between the vehicle body and the front subframe. By arranging the first support body 211 and the first connecting part 212, the load borne by the vehicle body can be effectively dispersed, and the overall torsional resistance of the vehicle can be improved. The first connecting part 212 is connected to the vehicle body and the first support body 211 by welding to ensure good connection strength.

[0042] Further, referring to Figure 1 , Figure 2 , Figure 5 and Figure 10The first support body 211 is hollow in the middle. The first support body 211 is formed by a plurality of sheet metal parts through welding, and the central part is a hollow body, and is welded and connected with the columnar first connecting part 212. On the basis of ensuring the bearing capacity of the first support body 211, the hollow inside of the first support body 211 helps to reduce the overall weight of the front subframe. In the case of collision, the cavity structure can deform when impacted, which can help to absorb and relieve impact energy and reduce direct impact on the passengers, thereby protecting the safety of the passenger compartment. At the same time, the cavity body can also effectively isolate noise, improve the acoustic environment inside the vehicle, reduce the entry of external noise, and reduce resonance inside the vehicle.

[0043] In an embodiment, referring to Figure 1 、 Figure 2 and Figure 5 , the vehicle body connecting piece further comprises a vehicle body middle mounting bracket 31 which is detachably arranged on the longitudinal beam 1, and the vehicle body middle mounting bracket 31 is arranged close to the middle cross beam 3. The vehicle body middle mounting bracket 31 is detachably arranged on the longitudinal beam 1, and the detachable connection is realized through bolts, so that the installation and maintenance can be flexibly carried out. In actual use, the vehicle body middle mounting bracket 31 is used as an optional component, and is configured according to different vehicle models. For the vehicle with the vehicle body middle mounting bracket 31, the vehicle body middle mounting bracket 31 can disperse the load from the vehicle body, and improve the stability and safety of the vehicle during driving. At the same time, since other vehicle components are arranged above the front subframe, such as arranging a motor, arranging a suspension or circuit wiring, the detachable vehicle body middle mounting bracket 31 can make the vehicle easier to maintain, and only the vehicle body middle mounting bracket 31 needs to be disassembled, without the need to disassemble the whole front subframe, so that sufficient maintenance operation space can be obtained.

[0044] In an embodiment, referring to Figure 1 、 Figure 2 and Figure 5The body connecting piece further comprises a swing arm mounting bracket 12 arranged at the position of the longitudinal beam 1 close to the middle cross beam 3, and the swing arm mounting bracket 12 is connected with the body middle mounting bracket 31. The swing arm mounting bracket 12 is arranged at the position of the longitudinal beam 1 close to the middle cross beam 3, thereby providing a stable mounting basis for the swing arm system of the vehicle. The swing arm mounting bracket 12 is welded by a plurality of sheet metal pieces, and bolt holes are formed on the upward face of the swing arm mounting bracket 12, and the body middle mounting bracket 31 is detachably connected with the swing arm mounting bracket 12 through bolts, so that the load can be effectively dispersed and transmitted during the driving of the vehicle, and the overall structural stability is improved. The body middle mounting bracket 31 is connected and mounted on the swing arm mounting bracket 12, so that the screw holes do not need to be arranged on the longitudinal beam 1 to mount the body middle mounting bracket 31, the machining of the longitudinal beam 1 is reduced, the structural integrity of the longitudinal beam 1 itself is ensured, the overall strength of the front subframe is effectively enhanced, and the impact resistance of the vehicle is improved. Meanwhile, the direct connection of the body middle mounting bracket 31 with the swing arm mounting bracket 12 also helps to improve the controllability and comfort of the vehicle, especially the road feedback performance of the front subframe of the utility model is more superior when the vehicle is driven on complex road conditions.

[0045] In an embodiment, with reference to Figure 1 , Figure 2 and Figure 5 , the body connecting piece further comprises a motor front suspension bracket 22 and a motor rear suspension bracket 33, the motor front suspension bracket 22 is arranged at the front cross beam 2, and the motor rear suspension bracket 33 is arranged at the middle cross beam 3. The motor front suspension bracket 22 is arranged on the front cross beam 2 to provide a supporting and fixing position for the motor, and the motor rear suspension bracket 33 is arranged on the middle cross beam 3, specifically at the center of the middle cross beam 3, and the motor rear suspension bracket 33 is used to support and fix the rear part of the motor. The motor front suspension bracket 22 cooperates with the motor rear suspension bracket 33 to ensure the stability of the motor during the working process, prevent displacement caused by vibration or impact, and thereby improve the working efficiency and service life of the motor.

[0046] In an embodiment, with reference to Figure 1 , Figure 2 and Figure 5, the middle cross beam 3 and the longitudinal beam 1 are provided with a flat pressing part 34, the contact edge of the flat pressing part 34 extends along the length direction of the longitudinal beam 1, and the extension length of the contact edge is greater than the beam diameter of the middle cross beam 3. In order to further enhance the connection strength between the middle cross beam 3 and the longitudinal beam 1 and make the welding between the two more easily automatic operation, the flat pressing part 34 is pressed on the pipe body of the middle cross beam 3 by stamping equipment to shape the flat pressing part 34. The contact edge of the flat pressing part 34 extends along the length direction of the longitudinal beam 1, and the extension length of the contact edge is greater than the beam diameter of the middle cross beam 3, which means that a larger contact area is provided at the connection, which helps to disperse the load and reduce local stress concentration, effectively improving the bending and shear resistance of the connection. By providing the flat pressing part 34, the impact from the road surface and the power system can be effectively resisted, and the stability of the whole vehicle is improved. At the same time, the existence of the flat pressing part 34 also simplifies the welding process when the middle cross beam 3 and the longitudinal beam 1 are manufactured and assembled, so that the welding robot can be more accurately connected and adjusted during automatic production, and the production efficiency is improved.

[0047] Further, the front and rear ends of the contact edge of the flat pressing part 34 are also provided with notches. By providing two notches at the front and rear ends of the contact edge of the flat pressing part 34, the internal stress between the middle cross beam 3 and the longitudinal beam 1 can be released, so that the front subframe is not easy to be damaged by structural interference and internal stress release during use after welding.

[0048] In an embodiment, referring to Figure 1 , Figure 2 and Figure 5 , the front subframe of the utility model further comprises a first rib plate 35, the first rib plate 35 is connected with the longitudinal beam 1, the middle cross beam 3 and the rear cross beam 4. In order to further improve the overall rigidity and strength of the front subframe, the first rib plate 35 is connected with the longitudinal beam 1, the middle cross beam 3 and the rear cross beam 4, forming a reinforced frame structure, effectively dispersing the stress of the frame, reducing deformation, and improving the controllability and stability of the vehicle. The addition of the first rib plate 35 enables the front subframe to have better resistance when facing bending and torsional loads, reducing the risk of structural damage. During actual driving of the vehicle, various forces such as acceleration, braking and steering received by the vehicle can be effectively transmitted and dispersed to the associated structural components through the rib plate. At the same time, since the first rib plate 35 is composed of multiple layers of sheet metal welded together, the structural performance is enhanced without significantly increasing the weight of the front subframe, thereby achieving better weight distribution and gravity control.

[0049] Further, the first rib plate 35 is also provided with a stabilizer bar mounting bracket (not shown in the figure). The stabilizer bar mounting bracket is used to fix and support the stabilizer bar to ensure its correct position in the suspension system.

[0050] In an embodiment, referring to Figure 1 ,Figure 2 and Figure 5 The longitudinal beam 1 is provided with an avoiding part 13, which is arranged between the middle cross beam 3 and the front cross beam 2 and is bent downward. The main function of arranging the avoiding part 13 on the longitudinal beam 1 is to avoid other components arranged above the front subframe. In particular, the downward bending design of the avoiding part 13 can effectively absorb and disperse the impact force when the vehicle collides, and guide the longitudinal beam 1 to produce controllable directional bending and structural collapse under the impact force, so that the longitudinal beam 1 further absorbs the impact force and does not directly invade into the cab behind the front subframe, thereby protecting the safety of the passengers.

[0051] In an embodiment, referring to Figure 1 , Figure 2 and Figure 5 The front subframe further comprises a second rib plate 23 connected to the front cross beam 2 and the longitudinal beam 1. The second rib plate 23 prevents stress concentration on the cross beam, disperses the stress, and further strengthens the connection strength between the front cross beam 2 and the longitudinal beam 1.

[0052] In an embodiment, referring to Figure 9 , ​ , ​ , and ​ The vehicle body rear mounting bracket 11 is internally provided with a cavity. The vehicle body rear mounting bracket 11 is welded by a plurality of sheet metal parts, and is connected to the vehicle body by a columnar connecting piece passing through the sheet metal parts from top to bottom by bolts. The internal cavity of the vehicle body rear mounting bracket 11 helps to reduce the overall weight of the front subframe. In the case of collision, the cavity structure can deform when impacted, which can help to absorb and relieve impact energy and reduce direct impact on the passengers, thereby protecting the safety of the passenger compartment. At the same time, the cavity body can effectively isolate noise, improve the acoustic environment inside the vehicle, reduce the transmission of external noise, and reduce resonance inside the vehicle.

[0053] The utility model also provides a vehicle, which uses the front subframe in the above embodiments. Compared with the vehicle of the prior art, the vehicle has a lighter overall weight due to the use of the front subframe of the utility model, and has better vehicle body stability and driving safety.

[0054] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A front subframe characterized by, The utility model relates to a front subframe of vehicle, including: a plurality of tubes, the tubes are configured as longitudinal beams, front cross beams, middle cross beams and rear cross beams, the longitudinal beams extend along the front-back direction of the vehicle, two longitudinal beams are arranged in parallel and at intervals, the front cross beams, middle cross beams and rear cross beams are arranged in sequence and at intervals along the front-back direction of the vehicle and are connected with the two longitudinal beams, at least one of the longitudinal beams, front cross beams, middle cross beams and rear cross beams is provided with a vehicle body connecting piece; the vehicle body connecting piece includes a vehicle body front mounting bracket and a vehicle body rear mounting bracket, the vehicle body front mounting bracket is arranged at the positions close to the left and right ends of the front cross beam, and the vehicle body rear mounting bracket is arranged at the positions close to the rear ends of the longitudinal beams; the vehicle body front mounting bracket includes first support bodies and first connecting parts, the two first support bodies are arranged on the upper surfaces of the front cross beam close to the left and right ends respectively, and the two first connecting parts are arranged at the two first support bodies away from each other, and the first connecting parts are used for being connected with the vehicle body.

2. The front subframe according to claim 1, characterized by two through holes are arranged at intervals on the front cross beam, and the two longitudinal beams are arranged in the two through holes respectively.

3. The front subframe of claim 1, wherein two ends of the middle cross beam along the length direction of the middle cross beam are welded with the two longitudinal beams respectively; and / or two ends of the rear cross beam along the length direction of the rear cross beam are welded with the two longitudinal beams respectively.

4. The front subframe of claim 1, wherein the vehicle body connecting piece further includes a vehicle body middle mounting bracket, the vehicle body middle mounting bracket is arranged on the longitudinal beam in a detachable mode, and the vehicle body middle mounting bracket is arranged close to the middle cross beam; and / or the vehicle body connecting piece further includes a swing arm mounting bracket, the swing arm mounting bracket is arranged on the longitudinal beam close to the middle cross beam, and the swing arm mounting bracket is connected with the vehicle body middle mounting bracket.

5. The front subframe of claim 1, wherein the vehicle body connecting piece further includes a motor front suspension bracket and a motor rear suspension bracket, the motor front suspension bracket is arranged on the front cross beam, and the motor rear suspension bracket is arranged on the middle cross beam.

6. The front subframe of claim 1, wherein a first rib plate is further included, and the first rib plate connects the longitudinal beams, the middle cross beams and the rear cross beams.

7. The front subframe according to any one of claims 1 to 6, characterized in that, a flat pressing part is arranged at the position where the middle cross beam is connected with the longitudinal beam, the contact edge of the flat pressing part extends along the length direction of the longitudinal beam, and the extension length of the contact edge is greater than the beam diameter of the middle cross beam.

8. A vehicle characterized by comprising: The utility model relates to a front subframe of vehicle, including according to any one of claims 1-7.

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