Steel-aluminum hybrid automobile front cabin structure and automobile

Abstract

The invention discloses a steel-aluminum hybrid automobile front cabin structure and an automobile. The steel-aluminum hybrid automobile front cabin structure comprises a front longitudinal beam structure, an upper longitudinal beam structure, a vibration reduction tower structure, a torsion box structure, a front wall structure and a front wall lower plate structure. The front part of the front longitudinal beam structure is fixedly welded with the upper longitudinal beam structure in an aligned manner; the middle of the front longitudinal beam structure is fixedly connected with the vibration reduction tower structure in an aligned mode. The rear portion of the upper longitudinal beam structure is fixedly connected with the vibration reduction tower structure in an aligned mode. The rear end of the upper longitudinal beam structure and the rear end of the front longitudinal beam structure are fixedly connected with the front wall structure in an aligned mode. The front wall structure is fixedly connected with the torsion box structure below the front wall structure, and the front wall structure is fixedly connected with the front wall lower plate structure at the rear end of the front wall structure; according to the steel-aluminum mixed front cabin automobile structure, the weight of aluminum alloy accounts for 65%, and the weight of a front cabin area can be effectively reduced; therefore, the weight of the front cabin is effectively reduced, and the collision safety performance requirement and the strength requirement are met.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle body structures, and in particular to a steel-aluminum hybrid vehicle front cabin structure and a vehicle. Background Art

[0002] In today's rapidly developing automobile industry and the context of energy conservation and environmental protection, reducing the overall weight of the vehicle body will effectively reduce energy consumption, so lightweighting of vehicles has become the mainstream of the development of the automobile industry.

[0003] Traditional body-in-white structures are mostly made of steel, and the overall body-in-white weight is relatively high. The density of aluminum alloy is one-third of that of steel. The all-aluminum body-in-white structure will effectively reduce the overall weight of the vehicle body; however, the connection process of the all-aluminum body is difficult to achieve, the maintenance cost is high, and collision safety performance is difficult to achieve. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a steel-aluminum hybrid automobile front engine room structure, the material of the front engine room area is composed of high-pressure cast aluminum, aluminum alloy and high-strength steel; the shock tower is made of high-pressure cast aluminum, the longitudinal beam outer plate, the longitudinal beam reinforcement plate, the front wall baffle cross beam and the like are made of aluminum alloy, the subframe reinforcement plate, the left front floor, the right front floor, the center channel and other important load-bearing points are made of high-strength steel, and the connection process adopts FDS (hot melt self-tapping riveting), SPR (self-piercing riveting), aluminum spot welding, gas shielded welding and other welding processes; the weight of the steel-aluminum hybrid front engine room automobile structure is 65% by weight of aluminum alloy, which can effectively reduce the weight of the front engine room area; the present invention constructs the front engine room structure by mixing high-pressure cast aluminum, aluminum alloy and high-strength steel, thereby effectively reducing the weight of the front engine room while meeting the collision safety performance requirements and strength requirements.

[0005] The present invention provides a steel-aluminum hybrid automobile front cabin structure, comprising a front longitudinal beam structure, an upper longitudinal beam structure, a vibration damping tower structure, a torsion box structure, a front wall structure, and a front wall lower plate structure;

[0006] The front part of the front longitudinal beam structure is fixedly welded to the upper longitudinal beam structure, and the front longitudinal beam structure and the upper longitudinal beam structure are connected by gas shielded welding; the middle part of the front longitudinal beam structure is fixedly connected to the shock absorber tower structure, and the front longitudinal beam structure and the shock absorber tower structure are connected by FDS; the rear part of the upper longitudinal beam structure is fixedly connected to the shock absorber tower structure, and the upper longitudinal beam structure and the shock absorber tower structure are connected by gas shielded welding and spot welding; the rear end of the upper longitudinal beam structure and the rear end of the front longitudinal beam structure are fixedly connected to the front enclosure structure, and the upper longitudinal beam structure, the front longitudinal beam structure and the front enclosure structure are connected by gas shielded welding; the front enclosure structure is fixedly connected to the torsion box structure below, and the front enclosure structure is fixedly connected to the front enclosure lower plate structure at its rear end, and the front enclosure structure, the torsion box structure and the front enclosure lower plate structure are connected by aluminum spot welding and SPR.

[0007] The front longitudinal beam structure includes a front longitudinal beam and a front longitudinal beam strengthening structure; the front longitudinal beam is a tubular body with a cross-section in a "mu" shape, and its material is aluminum profile; see Figure 2 As shown, the cross-sectional shape of the existing front longitudinal beam is a "ji" shape, and its material is high-strength steel; the front longitudinal beam structure of the present invention has good anti-collision function and obvious weight reduction effect; a relief notch is provided in the middle of the outer side wall at the lower end of the front longitudinal beam, and a local notch is cut to avoid the steering shaft. A machined aluminum part reinforcing rib is fixedly arranged at each corner of the relief notch to meet the requirements of collision safety and strength. The connection method between the machined aluminum part reinforcing rib and the relief notch is gas shielded welding; compared with the existing steel front longitudinal beam structure, the front longitudinal beam structure of the present invention can achieve the same performance requirements under the same layout space, but the weight is reduced by at least half; the front longitudinal beam strengthening structure includes a front subframe front fixing point reinforcing rib; a front subframe front fixing point reinforcing rib is fixed on the inner wall of the cavity at the front subframe front fixing point position of the front longitudinal beam. The front subframe front fixing point reinforcing rib includes a large U-shaped rib plate and a small U-shaped rib plate sleeved inside and outside. The small U-shaped rib plate is suspended and sleeved inside the large U-shaped rib plate. The two side walls of the large U-shaped rib plate are in contact with the inner wall of the cavity corresponding to the front subframe front fixing point position of the front longitudinal beam. The front longitudinal beam and the front subframe front fixing point reinforcing rib are fixedly connected to each other by welding bolts and nuts. The double U-shaped structure of the large U-shaped rib plate and the small U-shaped rib plate has one function of matching the length of the bushing sleeved on the welding bolt, and the other function is to enhance the anti-bending strength of the cavity of the front longitudinal beam in the Y direction (width direction) and Z direction (vertical direction) at this position. The material of the front subframe front fixing point reinforcing rib is high-strength steel.

[0008] The front longitudinal beam strengthening structure also includes a front suspension fixing point reinforcing rib; a front suspension fixing point reinforcing rib is fixed on the inner wall of the cavity at the front suspension fixing point position of the front longitudinal beam. The front suspension fixing point reinforcing rib is formed by stacking and welding two sheet materials with an L-shaped cross-section to form a "kou" shape structure. The material of the front suspension fixing point reinforcing rib is high-strength steel. The front longitudinal beam and the superposition position of the front suspension fixing point reinforcing rib are fixedly connected to each other by welding bolts and nuts. The structure of the superposition position of the front suspension fixing point reinforcing rib has one function of matching the length of the bushing sleeved on the welding bolt, and the other function is to enhance the support strength of the cavity of the front longitudinal beam in the Y direction (width direction) and Z direction (vertical direction) at this position.

[0009] The front longitudinal beam reinforcement structure also includes a front sub-frame rear fixed point reinforcement rib; the inner wall of the cavity at the rear fixed point position of the front sub-frame of the front longitudinal beam is fixed with a front sub-frame rear fixed point reinforcement rib, and the front sub-frame rear fixed point reinforcement rib includes a T-bar with an internal threaded channel and a welding washer, the T-bar with the internal threaded channel is inserted from bottom to top between the outer bottom wall and the outer top wall of the cavity corresponding to the rear fixed point position of the front sub-frame of the front longitudinal beam, the welding washer is welded and sleeved on the end of the T-bar with the internal threaded channel and contacts the outer top wall of the front longitudinal beam; the T-bar with the internal threaded channel is made of machined aluminum, and is provided with an internal thread inside thereof for connecting with the sub-frame, and in order to increase the strength of the sub-frame connection point, a welding washer is welded on the end of the T-bar with the internal threaded channel, and the material of the welding washer is high-strength steel; the rear end of the front longitudinal beam structure is fixedly connected to the corresponding front enclosure structure through a first L-shaped reinforcement member to strengthen the connection strength between the front longitudinal beam structure and the front enclosure structure.

[0010] The upper longitudinal beam structure includes an upper longitudinal beam inner plate and an upper longitudinal beam outer plate; the upper longitudinal beam inner plate and the upper longitudinal beam outer plate are fixed by spot welding, and the materials of the upper longitudinal beam inner plate and the upper longitudinal beam outer plate are both aluminum alloy, the upper longitudinal beam inner plate is fixedly connected to the vibration tower structure, and the upper longitudinal beam provides a connection point for the headlights and other layout parts; the upper longitudinal beam outer plate is connected to the front longitudinal beam structure through a second L-shaped connecting piece, and the connection form is gas shielded welding, the middle area of ​​the upper longitudinal beam outer plate is fixedly connected to the vibration tower structure, and the rear section of the upper longitudinal beam outer plate can be connected to the side of the vehicle body; the upper longitudinal beam inner plate, the upper longitudinal beam outer plate and the vibration tower structure are multi-layered by adding a through-hole structure, gas shielded welding and spot welding to achieve a tight connection structure. In addition, the upper longitudinal beam inner plate and the upper longitudinal beam outer plate are connected by aluminum spot welding, which can transmit force to the front structure and the side structure.

[0011] The material of the vibration damping tower structure is high-pressure cast aluminum. The vibration damping tower structure is respectively connected to the upper longitudinal beam structure and the front longitudinal beam structure by FDS, spot welding and gas shielded welding, and is fixedly connected to the front enclosure structure by a third L-shaped connector. At this point, the force at the front end can be transmitted to the front enclosure structure through three paths, namely the front longitudinal beam structure, the upper longitudinal beam structure and the vibration damping tower structure, and the intrusion amount of the front enclosure structure is effectively reduced as the three structures are crushed.

[0012] The torsion box structure as a whole is formed into a convex structure by stamping aluminum alloy, and the inner surface of the convex structure is respectively protruded upward with a left side folded edge reinforcement rib structure, a middle side folded edge reinforcement rib structure and a right side folded edge reinforcement rib structure; the outer surface of the torsion box structure is provided with a steel reinforcement member corresponding to the front sub-frame fixing point position to improve the strength of the front sub-frame fixing point position, the left side folded edge reinforcement rib structure, the middle side folded edge reinforcement rib structure and the right side folded edge reinforcement rib structure are respectively connected to the front end and the rear end of the torsion box structure, and the front end of the torsion box structure is fixedly connected to the front longitudinal beam structure. When the force is transmitted to the torsion box structure, the force can be transmitted to the rear end of the torsion box through three paths of the left, middle and right reinforcement rib structures, thereby increasing the force transmission path and meeting the performance requirements.

[0013] The front enclosure structure includes a front enclosure upper structure and a front enclosure lower structure, both of which are made of aluminum alloy, providing fixing points for air-conditioning three-box, brake pedal and other layout parts; the front enclosure lower structure is fixedly formed by a front enclosure front crossbeam and a front enclosure rear crossbeam, a hollow cavity structure is formed between the front enclosure front crossbeam and the front enclosure rear crossbeam, the front enclosure front crossbeam is respectively aligned and fixedly connected to the front longitudinal beam structure and the torsion box structure, and the connection methods are aluminum spot welding, SPR and gas shielded welding to meet the collision safety performance requirements; the front enclosure rear crossbeam is respectively aligned and fixedly connected to the front enclosure lower plate structure and the front enclosure upper structure, and the connection methods are SPR, aluminum spot welding and gas shielded welding, which plays a strong supporting role.

[0014] The front enclosure lower plate structure includes a center channel structure, a left front floor and a right front floor; the center channel structure is fixedly constructed by a double-layer structure of a center channel upper plate and a center channel lower plate, the center channel upper plate is made of high-strength steel, and the center channel lower plate is made of aluminum alloy. In order to enable the front enclosure lower plate structure to fully absorb energy and reduce damage to occupants, the center channel upper plate, the left front floor and the right front floor are all made of high-strength steel; the center channel structure is connected to the left front floor and the right front floor by SPR and spot welding, a steel reinforcement is arranged in the middle area of ​​the center channel lower plate, and the steel reinforcement is fixedly connected to the torsion box structure in alignment to improve the torsional stiffness of the front cabin part; fishbone-shaped reinforcement ribs are respectively arranged at corresponding positions of the left front floor and the right front floor to improve the strength and torsional stiffness of the front cabin part.

[0015] A car comprises a vehicle sheet metal and a steel-aluminum hybrid vehicle front cabin structure, wherein the steel-aluminum hybrid vehicle front cabin structure is arranged at the front part of the vehicle sheet metal.

[0016] Beneficial Effects

[0017] The material of the front engine compartment area of ​​the present invention is composed of high-pressure cast aluminum, aluminum alloy and high-strength steel; the shock tower is made of high-pressure cast aluminum, the longitudinal beam outer plate, the longitudinal beam reinforcement plate, the front fender cross beam and the like are made of aluminum alloy, the subframe reinforcement plate, the left front floor, the right front floor, the center channel and other important load-bearing points are made of high-strength steel, and the connection process adopts FDS, SPR, aluminum spot welding, gas shielded welding and other welding processes; the weight of the steel-aluminum hybrid front engine compartment automobile structure is 65% of the aluminum alloy, which can effectively reduce the weight of the front engine compartment area; the present invention constructs the front engine compartment structure by mixing high-pressure cast aluminum, aluminum alloy and high-strength steel, thereby effectively reducing the weight of the front engine compartment while meeting the collision safety performance requirements and strength requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a partial enlarged structural schematic diagram of the front longitudinal beam of the prior art.

[0020] Figure 3 It is a partial enlarged structural schematic diagram of the front longitudinal beam of the present invention.

[0021] Figure 4 It is a schematic diagram of an enlarged structure of the front longitudinal beam structure of the present invention when viewed from above.

[0022] Figure 5 It is a schematic diagram of an enlarged cross-sectional view of the front portion of the front longitudinal beam structure of the present invention.

[0023] Figure 6 It is a schematic diagram of an enlarged cross-sectional view of the rear portion of the front longitudinal beam structure of the present invention.

[0024] Figure 7 It is a schematic diagram of an enlarged top view of the torsion box structure of the present invention.

[0025] Figure 8 It is a three-dimensional enlarged structural schematic diagram of the torsion box structure of the present invention.

[0026] Fig. 9 It is a bottom view structural schematic diagram of the front enclosure structure and the front enclosure lower plate structure of the present invention.

[0027] Fig.10 It is an enlarged structural schematic diagram of the front enclosure structure of the present invention.

[0028] Fig.11 It is a bottom view of the structure of the front lower plate structure of the present invention.

[0029] In the figure:

[0030] 1. Front longitudinal beam structure; 11. Front longitudinal beam; 111. Avoidance notch; 112. Machined aluminum reinforcement ribs; 12. Front longitudinal beam reinforcement structure; 121. Front subframe front fixing point reinforcement ribs; 1211. Large U-shaped ribs; 1212. Small U-shaped ribs; 122. Front suspension fixing point reinforcement ribs; 123. Front subframe rear fixing point reinforcement ribs; 1231. T-bar with internal thread channel; 1232. Welding washer; 13. First L-shaped reinforcement member;

[0031] 2. Upper longitudinal beam structure; 21. Upper longitudinal beam outer plate; 211. Second L-shaped connecting piece;

[0032] 3. Vibration tower structure; 31. The third L-shaped connector;

[0033] 4. Torque box structure; 41. Left folding rib structure; 42. Middle folding rib structure; 43. Right folding rib structure; 44. Steel reinforcement;

[0034] 5. Front enclosure structure; 51. Front enclosure upper structure; 52. Front enclosure lower structure; 521. Front enclosure front crossbeam; 522. Front enclosure rear crossbeam;

[0035] 6. Front lower panel structure; 61. Center channel structure; 611. Center channel upper panel; 612. Center channel lower panel; 6121. Steel reinforcement; 62. Left front floor; 63. Right front floor. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Embodiment 1

[0040] See Figure 1 、 Figure 3-Figure 11 As shown in, a steel-aluminum hybrid front engine compartment structure of an automobile includes a front longitudinal beam structure 1, an upper longitudinal beam structure 2, a shock tower structure 3, a torque box structure 4, a front panel structure 5, and a front panel lower plate structure 6;

[0041] The front part of the front longitudinal beam structure 1 is connected to the upper longitudinal beam structure 2 in alignment by gas shielded welding; the middle part of the front longitudinal beam structure 1 is connected to the shock tower structure 3 in alignment by FDS; the rear part of the upper longitudinal beam structure 2 is connected to the shock tower structure 3 in alignment by gas shielded welding and spot welding; the rear end of the upper longitudinal beam structure 2 and the rear end of the front longitudinal beam structure 1 are connected to the front panel structure 5 in alignment by gas shielded welding; the front panel structure 5 is fixedly connected to the lower torque box structure 4 by aluminum spot welding and SPR, and the front panel structure 5 is fixedly connected to the front panel lower plate structure 6 at its rear end by aluminum spot welding and SPR.

[0042] The front longitudinal beam structure 1 includes a front longitudinal beam 11 and a front longitudinal beam strengthening structure 12; the front longitudinal beam 11 is a tubular body, and its cross-section is in a "mu" shape structure, and its material is an aluminum profile; a relief notch 111 is provided in the middle of the outer side wall of the lower end of the front longitudinal beam 11, and a machined aluminum part reinforcing rib 112 is fixedly provided at each corner of the relief notch 111 by gas shielded welding; the front longitudinal beam strengthening structure 12 includes a front subframe front fixing point reinforcing rib 121; the front subframe front fixing point reinforcing rib 121 is fixedly provided on the inner wall of the cavity at the front subframe front fixing point position of the front longitudinal beam 11. The front subframe front fixing point reinforcing rib 121 includes a large U-shaped rib piece 1211 and a small U-shaped rib piece 1212 which are sleeved inside and outside. The small U-shaped rib piece 1212 is suspended and sleeved inside the large U-shaped rib piece 1211. The two side walls of the large U-shaped rib piece 1211 are in contact with the inner wall of the cavity corresponding to the front subframe front fixing point position of the front longitudinal beam 11. The front longitudinal beam 11 and the front subframe front fixing point reinforcing rib 121 are fixedly connected to each other by welding bolts and nuts, and the material of the front subframe front fixing point reinforcing rib 121 is high-strength steel.

[0043] The front longitudinal beam reinforcement structure 12 also includes a front suspension fixing point reinforcement rib 122; the front longitudinal beam 11 has a front suspension fixing point reinforcement rib 122 fixed to the inner wall of the cavity at the front suspension fixing point position, and the front suspension fixing point reinforcement rib 122 is formed by two L-shaped cross-section sheets stacked and welded to form a "mouth"-shaped structure, and the front suspension fixing point reinforcement rib 122 is made of high-strength steel, and the front longitudinal beam 11 and the front suspension fixing point reinforcement rib 122 are fixedly connected to each other at the overlapping position by welding bolts and nuts.

[0044] The front longitudinal beam reinforcement structure 12 also includes a front sub-frame rear fixed point reinforcement rib 123; the front sub-frame rear fixed point reinforcement rib 123 is fixed to the inner wall of the cavity at the rear fixed point position of the front sub-frame of the front longitudinal beam 11, and the front sub-frame rear fixed point reinforcement rib 123 includes a T-shaped rod 1231 with an internal thread channel and a welding washer 1232, the T-shaped rod 1231 with the internal thread channel is inserted from bottom to upper limit between the outer bottom wall and the outer top wall of the cavity corresponding to the rear fixed point position of the front sub-frame of the front longitudinal beam 11, and the welding washer 1232 is welded and sleeved on the end of the T-shaped rod 1231 with the internal thread channel and contacts the outer top wall of the front longitudinal beam 11; the material of the T-shaped rod 1231 with the internal thread channel is machined aluminum, and the material of the welding washer 1232 is high-strength steel; the rear end of the front longitudinal beam structure 1 is fixedly connected to the corresponding front enclosure structure 5 through the first L-shaped reinforcement member 13.

[0045] The upper longitudinal beam structure 2 includes an upper longitudinal beam inner plate and an upper longitudinal beam outer plate 21; the upper longitudinal beam inner plate and the upper longitudinal beam outer plate 21 are fixed by aligning spot welding, and the upper longitudinal beam inner plate and the upper longitudinal beam outer plate 21 are both made of aluminum alloy, and the upper longitudinal beam inner plate is aligned and fixedly connected to the vibration tower structure 3; the upper longitudinal beam outer plate 21 is fixedly connected to the front longitudinal beam structure 1 by gas shielded welding through a second L-shaped connecting piece 211, and the middle area of ​​the upper longitudinal beam outer plate 21 is fixedly connected to the vibration tower structure 3 by gas shielded welding and spot welding, and the rear section of the upper longitudinal beam outer plate 21 can be connected to the side of the vehicle body.

[0046] The vibration tower structure 3 is made of high-pressure cast aluminum. The vibration tower structure 3 is connected to the upper longitudinal beam structure 2 and the front longitudinal beam structure 1 through FDS, spot welding and gas shielded welding, and is fixedly connected to the front enclosure structure 5 through a third L-shaped connector 31 through FDS, spot welding and gas shielded welding.

[0047] The torsion box structure 4 is formed as a whole by stamping an aluminum alloy into a convex structure, and the inner surface of the convex structure is respectively protruding upward with a left side folded reinforcement rib structure 41, a middle side folded reinforcement rib structure 42 and a right side folded reinforcement rib structure 43; the outer surface of the torsion box structure 4 is provided with a steel reinforcement member 44 corresponding to the front subframe fixing point position, the left side folded reinforcement rib structure 41, the middle side folded reinforcement rib structure 42 and the right side folded reinforcement rib structure 43 are respectively connected to the front end and the rear end of the torsion box structure 4, and the front end of the torsion box structure 4 is fixedly connected to the front longitudinal beam structure 1.

[0048] The front enclosure structure 5 includes a front enclosure upper structure 51 and a front enclosure lower structure 52, both of which are made of aluminum alloy; the front enclosure lower structure 52 is fixedly formed by a front enclosure front cross beam 521 and a front enclosure rear cross beam 522, and a hollow cavity structure is formed between the front enclosure front cross beam 521 and the front enclosure rear cross beam 522, and the front enclosure front cross beam 521 and the front enclosure rear cross beam 522 are respectively aligned with the front longitudinal beam structure 1 and the torsion box structure 4 and fixedly connected by aluminum spot welding, SPR and gas shielded welding; the front enclosure rear cross beam 522 is respectively aligned with the front enclosure lower plate structure 6 and the front enclosure upper structure 51 and fixedly connected by SPR, aluminum spot welding and gas shielded welding.

[0049] The front enclosure lower plate structure 6 includes a center channel structure 61, a left front floor 62 and a right front floor 63; the center channel structure 61 is fixedly constructed by a double-layer structure of a center channel upper plate 611 and a center channel lower plate 612, the center channel upper plate 611 is made of high-strength steel, the center channel lower plate 612 is made of aluminum alloy, and the center channel upper plate 611, the left front floor 62 and the right front floor 63 are all made of high-strength steel; the center channel structure 61 and the left front floor 62 and the right front floor 63 are connected by SPR and spot welding, a steel reinforcement 6121 is arranged in the middle area of ​​the center channel lower plate 612, and the steel reinforcement 6121 is aligned and fixedly connected to the torsion box structure 4; fishbone-shaped reinforcement ribs are arranged at corresponding positions of the left front floor 62 and the right front floor 63.

[0050] Example 2

[0051] A car comprises a vehicle sheet metal and a steel-aluminum hybrid vehicle front cabin structure, wherein the steel-aluminum hybrid vehicle front cabin structure is arranged at the front part of the vehicle sheet metal.

[0052] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A steel-aluminum hybrid automobile front cabin structure, characterized in that: It includes a front longitudinal beam structure (1), an upper longitudinal beam structure (2), a shock absorber tower structure (3), a torsion box structure (4), a front panel structure (5), and a lower front panel structure (6); The front part of the front longitudinal beam structure (1) is butt-welded and fixed to the upper longitudinal beam structure (2); the middle part of the front longitudinal beam structure (1) is fixedly connected to the shock absorber tower structure (3) in alignment; the rear part of the upper longitudinal beam structure (2) is fixedly connected to the shock absorber tower structure (3) in alignment; the rear end of the upper longitudinal beam structure (2) and the rear end of the front longitudinal beam structure (1) are fixedly connected to the front panel structure (5) in alignment; the front panel structure (5) is fixedly connected to the torsion box structure (4) below, and the front panel structure (5) is fixedly connected to the lower front panel structure (6) at its rear end.

2. The steel-aluminum hybrid automobile front cabin structure according to claim 1, characterized in that: The front longitudinal beam structure (1) includes a front longitudinal beam (11) and a front longitudinal beam strengthening structure (12); the front longitudinal beam (11) is a tubular body with a cross-section in the shape of a "mu" character structure, and its material is aluminum profile; a relief notch (111) is provided in the middle of the outer side wall of the lower end of the front longitudinal beam (11), and a machined aluminum part reinforcing rib (112) is fixedly provided at each corner of the relief notch (111); the front longitudinal beam strengthening structure (12) includes a front subframe front fixing point reinforcing rib (121); the front subframe front fixing point reinforcing rib (121) is fixed to the inner wall of the cavity at the front subframe front fixing point position of the front longitudinal beam (11), and the front subframe front fixing point reinforcing rib (121) includes a large U-shaped rib plate (1211) and a small U-shaped rib plate (1212) sleeved inside and outside, the small U-shaped rib plate (1212) is suspended and sleeved inside the large U-shaped rib plate (1211), the two side walls of the large U-shaped rib plate (1211) are in contact with the inner wall of the cavity corresponding to the front subframe front fixing point position of the front longitudinal beam (11), and the front longitudinal beam (11) and the front subframe front fixing point reinforcing rib (121) are fixedly connected to each other by welding bolts and nuts, and the material of the front subframe front fixing point reinforcing rib (121) is high-strength steel.

3. The steel-aluminum hybrid automobile front cabin structure according to claim 2, characterized in that: The front longitudinal beam strengthening structure (12) further includes a front suspension fixing point reinforcing rib (122); the front suspension fixing point reinforcing rib (122) is fixed to the inner wall of the cavity at the front suspension fixing point position of the front longitudinal beam (11), and the front suspension fixing point reinforcing rib (122) is formed by superimposing and welding two sheet materials with an L-shaped cross-section to form a "square" character structure, the material of the front suspension fixing point reinforcing rib (122) is high-strength steel, and the front longitudinal beam (11) and the front suspension fixing point reinforcing rib (122) are fixedly connected to each other by welding bolts and nuts at the superimposed position.

4. The steel-aluminum hybrid automobile front cabin structure according to claim 3, characterized in that: The front longitudinal beam reinforcement structure (12) also includes a front sub-frame rear fixing point reinforcement rib (123); the front sub-frame rear fixing point reinforcement rib (123) is fixed to the inner wall of the cavity at the position of the front sub-frame rear fixing point of the front longitudinal beam (11); the front sub-frame rear fixing point reinforcement rib (123) includes a T-shaped rod (1231) with an internal thread channel and a welding washer (1232); the T-shaped rod (1231) with an internal thread channel is penetrated from the bottom to the upper limit position at the front of the front longitudinal beam (11); A welding gasket (1232) is welded and sleeved on the end of a T-shaped rod (1231) with an internal threaded channel between the outer bottom wall and the outer top wall of the cavity corresponding to the rear fixing point of the subframe and contacts the outer top wall of the front longitudinal beam (11); the T-shaped rod (1231) with an internal threaded channel is made of machined aluminum, and the welding gasket (1232) is made of high-strength steel; the rear end of the front longitudinal beam structure (1) is fixedly connected to the aligned front enclosure structure (5) via a first L-shaped reinforcement member (13).

5. The steel-aluminum hybrid automobile front cabin structure according to claim 4, characterized in that: The upper longitudinal beam structure (2) comprises an upper longitudinal beam inner plate and an upper longitudinal beam outer plate (21); the upper longitudinal beam inner plate and the upper longitudinal beam outer plate (21) are fixed by spot welding, and the upper longitudinal beam inner plate and the upper longitudinal beam outer plate (21) are both made of aluminum alloy, and the upper longitudinal beam inner plate is fixedly connected to the vibration tower structure (3); the upper longitudinal beam outer plate (21) is connected to the front longitudinal beam structure (1) through a second L-shaped connecting piece (211), and the middle area of ​​the upper longitudinal beam outer plate (21) is fixedly connected to the vibration tower structure (3).

6. The steel-aluminum hybrid automobile front cabin structure according to claim 5, characterized in that: The vibration-damping tower structure (3) is made of high-pressure cast aluminum. The vibration-damping tower structure (3) is respectively connected to the upper longitudinal beam structure (2) and the front longitudinal beam structure (1), and is fixedly connected to the front enclosure structure (5) via a third L-shaped connecting piece (31).

7. The steel-aluminum hybrid automobile front cabin structure according to claim 6, characterized in that: The torsion box structure (4) is formed as a convex structure by stamping aluminum alloy. The inner surface of the convex structure is provided with a left folding reinforcing rib structure (41), a middle folding reinforcing rib structure (42) and a right folding reinforcing rib structure (43) protruding upwards. A steel reinforcement member (44) is provided on the outer surface of the torsion box structure (4) at a position corresponding to a fixing point of the front subframe. The left folding reinforcing rib structure (41), the middle folding reinforcing rib structure (42) and the right folding reinforcing rib structure (43) are respectively connected to the front end and the rear end of the torsion box structure (4). The front end of the torsion box structure (4) is fixedly connected to the front longitudinal beam structure (1).

8. The steel-aluminum hybrid automobile front cabin structure according to claim 7, characterized in that: The front enclosure structure (5) comprises a front enclosure upper structure (51) and a front enclosure lower structure (52), and the materials of the front enclosure upper structure (51) and the front enclosure lower structure (52) are both aluminum alloy; the front enclosure lower structure (52) is fixedly formed by a front enclosure front cross beam (521) and a front enclosure rear cross beam (522), and a hollow cavity structure is formed between the front enclosure front cross beam (521) and the front enclosure rear cross beam (522), and the front enclosure front cross beam (521) is respectively aligned and fixedly connected to the front longitudinal beam structure (1) and the torsion box structure (4); the front enclosure rear cross beam (522) is respectively aligned and fixedly connected to the front enclosure lower plate structure (6) and the front enclosure upper structure (51).

9. The steel-aluminum hybrid automobile front cabin structure according to claim 8, characterized in that: The front enclosure lower plate structure (6) comprises a central channel structure (61), a left front floor (62) and a right front floor (63); the central channel structure (61) is fixedly constructed by a central channel upper plate (611) and a central channel lower plate (612) having a double-layer structure, the central channel upper plate (611) being made of high-strength steel, the central channel lower plate (612) being made of aluminum alloy, and the central channel upper plate (611), the left front floor (62) and the right front floor (63) being all made of high-strength steel; the central channel structure (61) is connected to the left front floor (62) and the right front floor (63) by SPR and spot welding; a steel reinforcement member (6121) is arranged in the middle region of the central channel lower plate (612), and the steel reinforcement member (6121) is aligned and fixedly connected to the torsion box structure (4); fishbone-shaped reinforcement ribs are arranged at corresponding positions of the left front floor (62) and the right front floor (63).

10. An automobile, comprising a vehicle sheet metal, characterized in that: It also includes a steel-aluminum hybrid automobile front cabin structure as described in any one of claims 1 to 9, and the steel-aluminum hybrid automobile front cabin structure is arranged at the front part of the vehicle sheet metal.

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