Vehicle longitudinal beam connecting structure, vehicle frame and vehicle

Abstract

The utility model provides a kind of vehicle longitudinal beam connecting structure, frame and vehicle, including U-shaped longitudinal beam, opening side is towards vehicle outside, the U-shaped longitudinal beam includes two linear ends oppositely arranged and curve end between two linear ends, wherein one side linear end is connected with the vehicle body floor of vehicle;Longitudinal beam side wall connecting piece is connected in the part opening side of the U-shaped longitudinal beam, forms closed cavity;Spiral spring mounting seat plate piece is located in the closed cavity, with the inside of the U-shaped longitudinal beam is connected;Shock absorber reinforcing plate, its lower end is located in the closed cavity;The lower end of the shock absorber reinforcing plate is connected with the spiral spring mounting seat plate piece, and also connected with the longitudinal beam side wall connecting piece. The utility model embodiment can improve the rigidity and strength of vehicle body floor attachment point, effectively improve vehicle body performance.

Description

Technical Field

[0001] This utility model relates to the field of vehicle body structure technology, and in particular to a vehicle longitudinal beam connection structure, a frame, and a vehicle. Background Technology

[0002] In existing conventional rear longitudinal beam structures, the longitudinal beam is welded to the vehicle floor to form a closed cavity structure, and a U-shaped cavity reinforcement structure is usually set inside the longitudinal beam cavity. This type of longitudinal beam structure suffers from insufficient rigidity and strength at the bottom plate mounting point. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide a vehicle longitudinal beam connection structure, frame and vehicle that overcomes or at least partially solves the above problems.

[0004] To address the aforementioned problems, in a first aspect, this utility model discloses a vehicle longitudinal beam connection structure, comprising: The U-shaped longitudinal beam has its opening side facing the outside of the vehicle. The U-shaped longitudinal beam includes two straight ends arranged opposite each other and a curved end located between the two straight ends, with one straight end connected to the vehicle's body floor. The longitudinal beam side connector is connected to the partially open side of the U-shaped longitudinal beam to form a closed cavity; A helical spring mounting plate is located in the enclosed cavity and is connected to the inner side of the U-shaped longitudinal beam; The lower end of the shock absorber reinforcing plate is located in the enclosed cavity; the lower end of the shock absorber reinforcing plate is connected to both the helical spring mounting base plate and the longitudinal beam side panel connector.

[0005] Optionally, the vehicle longitudinal beam connection structure further includes: A rear suspension reinforcement plate is installed on the outside of the curved end of the U-shaped longitudinal beam; the rear suspension reinforcement plate is connected to both the U-shaped longitudinal beam and the vehicle floor.

[0006] Optionally, the helical spring mounting plate includes: The inner support plate of the helical spring mounting seat and the reinforcing plate of the helical spring mounting seat are connected sequentially to the inner side of the U-shaped longitudinal beam along the length of the vehicle. The inner support plate of the helical spring mounting base is connected to the side wall connector of the longitudinal beam.

[0007] Optionally, the shock absorber reinforcing plate is connected to the helical spring mounting plate and the longitudinal beam side panel connector by bolts.

[0008] Optionally, the rear mounting reinforcement plate of the suspension, the U-shaped longitudinal beam, and the rear mounting reinforcement plate of the suspension are arranged to form a cavity structure.

[0009] Optionally, the U-shaped longitudinal beam and the longitudinal beam side connecting parts are made of high-strength steel for hot stamping.

[0010] Optionally, the helical spring mounting plate and the shock absorber reinforcing plate are made of duplex cold-rolled galvanized steel sheet.

[0011] Optionally, the rear suspension reinforcement plate is made of duplex cold-rolled galvanized steel sheet.

[0012] In a second aspect, this utility model discloses a vehicle frame, including the vehicle longitudinal beam connection structure described above.

[0013] In a third aspect, this utility model discloses a vehicle, comprising: the vehicle longitudinal beam connection structure as described above or the vehicle frame as described above.

[0014] This utility model has the following advantages: This utility model embodiment uses a U-shaped longitudinal beam with its opening side facing the outside of the vehicle. The U-shaped longitudinal beam includes two oppositely arranged straight ends and a curved end located between the two straight ends, with one straight end connected to the vehicle's floor. A longitudinal beam side panel connector is connected to the partially open side of the U-shaped longitudinal beam, forming a closed cavity. A coil spring mounting plate is located in the closed cavity and connected to the inner side of the U-shaped longitudinal beam. A shock absorber reinforcing plate has its lower end located in the closed cavity. The lower end of the shock absorber reinforcing plate is connected to the... The coil spring mounting plate is connected to the longitudinal beam side panel connector; it connects to the vehicle floor via one straight end of the U-shaped longitudinal beam. The longitudinal beam side panel connector and the U-shaped longitudinal beam form a closed cavity for support. The coil spring mounting plate is inside the closed cavity and connects to three sides of the U-shaped longitudinal beam, providing effective support for the closed cavity. The shock absorber reinforcement plate connects the coil spring mounting plate and the rear longitudinal beam side panel connector, forming a good force transmission path; thus ensuring the stiffness and strength of the connection. The vehicle longitudinal beam connection structure, as the attachment point to the vehicle floor, effectively improves the stiffness and strength of the attachment point, thus enhancing vehicle performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a vehicle longitudinal beam connection structure according to this utility model; Figure 2 yes Figure 1 AA section view; Figure 3 yes Figure 1 BB cross-sectional view.

[0016] Explanation of reference numerals in the attached figures: 100-U-shaped longitudinal beam, 200-Longitudinal beam side connector, 300-Coil spring mounting plate, 310-Coil spring mounting inner support plate, 320-Coil spring mounting reinforcement plate, 400-Shock absorber reinforcement plate, 500-Suspension rear mounting reinforcement plate, 600-Body floor. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Reference Figure 1 This diagram shows a first structural schematic of a vehicle longitudinal beam connection structure according to the present invention; refer to Figure 2 , showed Figure 1 The AA sectional view shows that the vehicle longitudinal beam connection structure may specifically include the following components: The U-shaped longitudinal beam 100 has its opening side facing the outside of the vehicle. The U-shaped longitudinal beam 100 includes two straight ends arranged opposite each other and a curved end located between the two straight ends. One of the straight ends is connected to the vehicle body floor 600. The longitudinal beam side connector 200 is connected to the partially open side of the U-shaped longitudinal beam 100 to form a closed cavity; The helical spring mounting plate 300 is located in the enclosed cavity and is connected to the inner side of the U-shaped longitudinal beam 100; The lower end of the shock absorber reinforcing plate 400 is located in the enclosed cavity; the lower end of the shock absorber reinforcing plate 400 is connected to both the helical spring mounting base plate 300 and the longitudinal beam side wall connector 200.

[0019] The vehicle longitudinal beam connection structure in this embodiment of the utility model may include a U-shaped longitudinal beam 100, a longitudinal beam side connector 200, a coil spring mounting plate 300, and a shock absorber reinforcing plate 400. The U-shaped longitudinal beam 100 has a U-shaped cross-section, and includes two oppositely arranged straight ends, with the curved segment connecting the two straight ends. One of the straight ends is connected to the vehicle body floor 600, providing an installation position for the vehicle body floor 600. The open side of the U-shaped longitudinal beam 100 faces the outside of the vehicle. For example, in the direction from back to front of the vehicle, the open side of the U-shaped longitudinal beam 100 on the left side of the vehicle faces the left side of the vehicle; the open side of the U-shaped longitudinal beam 100 on the right side of the vehicle faces the right side of the vehicle.

[0020] The longitudinal beam side wall connecting member 200 is located outside the U-shaped longitudinal beam 100 and can be connected to the U-shaped longitudinal beam 100. When connected to a part of the U-shaped longitudinal beam 100, a closed cavity is formed. At this time, the cross-section of the closed cavity is similar to a "mouth" shape. The helical spring mounting seat plate member 300 is located in the closed cavity and is connected to the inner side of the U-shaped longitudinal beam 100 in the closed cavity, thereby supporting the U-shaped longitudinal beam 100 and enhancing the rigidity and strength of the U-shaped longitudinal beam 100. The shock absorber reinforcing plate 400 can also be located in the closed cavity. The shock absorber reinforcing plate 400 can be located between the helical spring mounting seat plate member 300 and the longitudinal beam side wall connecting member 200. That is, one end of the shock absorber reinforcing plate 400 is connected to the helical spring mounting seat plate member 300, and the other end of the shock absorber reinforcing plate 400 is connected to the longitudinal beam side wall connecting member 200. The helical spring mounting seat plate member 300, the shock absorber reinforcing plate 400, and the longitudinal beam side wall connecting member 200 form a force transmission path. The load borne by the U-shaped longitudinal beam 100 can be transmitted through the helical spring mounting seat plate member 300, the shock absorber reinforcing plate 400, and the longitudinal beam side wall connecting member 200. The helical spring mounting seat plate member 300, the shock absorber reinforcing plate 400, and the longitudinal beam side wall connecting member 200 can jointly bear the load borne by the U-shaped longitudinal beam 100 and disperse the load, thereby improving the stiffness and strength.

[0021] In addition, the vehicle longitudinal beam connection structure of the embodiment of the present utility model is applied to the longitudinal beam part at the rear of the vehicle. That is, the U-shaped longitudinal beam 100, the longitudinal beam side wall connecting member 200, the helical spring mounting seat plate member 300, and the shock absorber reinforcing plate 400 can be the U-shaped longitudinal beam 100, the longitudinal beam side wall connecting member 200, the helical spring mounting seat plate member 300, and the shock absorber reinforcing plate 400 at the rear of the vehicle. The longitudinal beam side wall connecting member 200, the helical spring mounting seat plate member 300, and the shock absorber reinforcing plate 400 can all be connected to the front end of the rear U-shaped longitudinal beam 100.

[0022] This embodiment of the utility model uses a U-shaped longitudinal beam 100, with its open side facing the outside of the vehicle. The U-shaped longitudinal beam 100 includes two straight ends arranged opposite each other and a curved end located between the two straight ends, with one straight end connected to the vehicle's body floor 600. A longitudinal beam side panel connector 200 is connected to a portion of the open side of the U-shaped longitudinal beam 100, forming a closed cavity. A coil spring mounting plate 300 is located in the closed cavity and connected to the inner side of the U-shaped longitudinal beam 100. A shock absorber reinforcing plate 400 has its lower end located in the closed cavity. The lower end of the shock absorber reinforcing plate 400 is connected to the coil spring mounting plate 300. The spring mounting plate 300 is connected to the longitudinal beam side panel connector 200. It connects to the vehicle body floor 600 via one straight end of the U-shaped longitudinal beam 100. The longitudinal beam side panel connector 200 and the U-shaped longitudinal beam 100 form a closed cavity for support. The coil spring mounting plate 300 is located inside this closed cavity and connects to three sides of the U-shaped longitudinal beam 100, providing effective support. The shock absorber reinforcement plate 400 connects the coil spring mounting plate 300 and the rear longitudinal beam side panel connector 200, forming a good force transmission path, thus ensuring the stiffness and strength of the connection. The vehicle longitudinal beam connection structure, as the attachment point to the vehicle body floor 600, enhances the stiffness and strength of the attachment point, effectively improving vehicle body performance.

[0023] In another embodiment of this utility model, the vehicle longitudinal beam connection structure further includes: A rear suspension reinforcement plate 500 is located on the outer side of the curved end of the U-shaped longitudinal beam 100; the rear suspension reinforcement plate 500 is connected to the U-shaped longitudinal beam 100 and the vehicle body floor 600 respectively.

[0024] Reference Figure 3 The vehicle longitudinal beam connection structure in this embodiment of the utility model may include a U-shaped longitudinal beam 100, a longitudinal beam side panel connector 200, a coil spring mounting plate 300, a shock absorber reinforcing plate 400, and a rear suspension mounting reinforcing plate 500. The U-shaped longitudinal beam 100, longitudinal beam side panel connector 200, coil spring mounting plate 300, and shock absorber reinforcing plate 400 can refer to the above embodiment. The longitudinal beam side panel connector 200 and the rear longitudinal beam can be connected by spot welding to form a closed cavity. The coil spring mounting plate 300 is located within the closed cavity. The coil spring mounting plate 300, shock absorber reinforcing plate 400, and longitudinal beam side panel connector 200 can be connected by bolts for easy disassembly and adjustment.

[0025] The helical spring mounting plate 300 is fixedly connected to the inner side of the U-shaped longitudinal beam 100, thereby strengthening the closed cavity. Further, the helical spring mounting plate 300 includes: an inner support plate 310 and a reinforcing plate 320 for the helical spring mounting, sequentially connected to the inner side of the U-shaped longitudinal beam 100 along the vehicle length direction; the inner support plate 310 is connected to the side wall connector 200 of the longitudinal beam.

[0026] The inner support plate 310 and the reinforcing plate 320 of the helical spring mounting base are distributed longitudinally along the inner side of the U-shaped longitudinal beam 100 and can be connected to the inner side of the U-shaped longitudinal beam 100 respectively. For example, the inner support plate 310 and the reinforcing plate 320 of the helical spring mounting base can be fixed to the inner side of the U-shaped longitudinal beam 100 by welding. The inner support plate 310 of the helical spring mounting base can be connected to the longitudinal beam side panel connector 200 to transfer and distribute the load. To improve the assembly efficiency of the longitudinal beam side panel connector 200, the inner support plate 310 of the helical spring mounting base and the longitudinal beam side panel connector 200 can be connected by bolts.

[0027] The rear suspension reinforcement plate 500 is located on the outer side of the curved end of the U-shaped longitudinal beam 100. Both ends of the rear suspension reinforcement plate 500 are connected to the U-shaped longitudinal beam 100 and the vehicle's floor 600, respectively. The rear suspension reinforcement plate 500 can be fixedly connected to the curved end of the U-shaped longitudinal beam 100 and the vehicle's floor 600 by welding.

[0028] Furthermore, the curved ends of the rear suspension reinforcement plate 500, the U-shaped longitudinal beam 100, and the vehicle body floor 600 form a cavity structure that jointly bears the load while providing an installation position for the chassis.

[0029] In some examples, the U-shaped longitudinal beam 100 and the longitudinal beam side connector 200 are made of high-strength steel for hot stamping.

[0030] The U-shaped longitudinal beam 100 and the longitudinal beam side connector 200 can be produced by die casting using high-strength steel for hot stamping. High-strength steel for hot stamping is an ultra-high-strength steel formed through a hot stamping process, with a tensile strength typically exceeding 1500 MPa. This process heats the steel sheet to its austenitizing temperature (approximately 880-930℃), then rapidly stamps it in a mold and simultaneously quenches it, forming a fully martensitic structure, thus achieving a balance between high strength and lightweight.

[0031] Specifically, the U-shaped longitudinal beam 100 can be made of high-strength steel of type SE950 / 1300HS-t1.5, used for hot stamping. The mechanical properties of SE950 / 1300HS-t1.5 are as follows: Yield strength after hot stamping ≥950 MPa; tensile strength 1300-1700 MPa (equivalent to bearing 13-17 tons of weight per square centimeter). Elongation after fracture ≥5% (ensuring sufficient plastic deformation capacity before fracture). Hardness: ≥400HV10 (or ≥40HRC), excellent surface wear resistance. Thickness 1.5mm. Hot stamping window: heating temperature 880-930℃, die quenching rate ≥30℃ / s, ensuring rapid formation of a fully martensitic structure after austenitization.

[0032] The longitudinal beam side connector 200 can be made of high-strength steel of model SE950 / 1300HS-t1.2, which is used for hot stamping. The mechanical properties of the longitudinal beam side connector 200 are similar to those of the U-shaped longitudinal beam 100, and the thickness is 1.2mm.

[0033] In some examples, the helical spring mounting plate 300 and the shock absorber reinforcing plate 400 are made of duplex cold-rolled galvanized steel sheet.

[0034] The helical spring mounting plate 300 and the shock absorber reinforcing plate 400 are manufactured from duplex cold-rolled galvanized steel sheets through a stamping process. Specifically, the inner support plate of the helical spring mounting seat in the helical spring mounting plate 300 can be made of duplex cold-rolled galvanized steel sheet of model HC420 / 780DPD+Z-t2.0; the reinforcing plate 320 of the helical spring mounting seat in the helical spring mounting plate 300 can be made of duplex cold-rolled galvanized steel sheet of model HC340 / 590DPD+Z-t1.8. The thickness of the HC420 / 780DPD+Z-t2.0 duplex cold-rolled galvanized steel sheet is 2.0 mm, and its mechanical properties are as follows: Yield strength: 420-550 MPa, ensuring that the material is not prone to permanent deformation under stress; Tensile strength: ≥780 MPa, capable of withstanding high loads; Elongation after fracture: ≥15%, ensuring that the material has sufficient plastic deformation capacity before fracture. The chemical composition includes: C (carbon): ≤0.18%, balancing strength and toughness; Si (silicon): ≤0.8%, inhibiting ferrite formation and improving hardenability; Mn (manganese): ≤2.5%, increasing strength and hardness; P (phosphorus) and S (sulfur): ≤0.04% and ≤0.015%, respectively, reducing the impact of impurities on performance; Al (aluminum): ≥0.005%, refining grains and improving material uniformity; Ni+Cr+Mo (nickel+chromium+molybdenum): ≤1.5%, further enhancing corrosion resistance and high-temperature stability. The HC340 / 590DPD+Z-t1.8 duplex cold-rolled galvanized steel sheet has a thickness of 1.8 mm and the following mechanical properties: yield strength ≥340 MPa; tensile strength ≥590 MPa; elongation after fracture ≥17%. The chemical composition includes: C (carbon): ≤0.15%; Si (silicon): ≤0.6%; Mn (manganese): ≤2.5%; P (phosphorus), S (sulfur): ≤0.04%, ≤0.015%; Al (aluminum): ≥0.005%; Ni+Cr+Mo (nickel+chromium+molybdenum): ≤1.5%.

[0035] In some examples, the rear suspension reinforcement plate 500 is made of duplex cold-rolled galvanized steel sheet.

[0036] The rear suspension reinforcement plate 500 can be manufactured from duplex cold-rolled galvanized steel sheet through a stamping process. Specifically, the rear suspension reinforcement plate 500 can be made from duplex cold-rolled galvanized steel sheet of grade HC340LAD+Z-t2.2. The thickness of the HC340LAD+Z-t2.2 duplex cold-rolled galvanized steel sheet is 2.2 mm. The mechanical properties of the HC340LAD+Z-t2.2 duplex cold-rolled galvanized steel sheet are: yield strength ≥340 MPa, tensile strength 420-520 MPa, and elongation ≥22%.

[0037] This embodiment of the invention features a U-shaped longitudinal beam 100 with its opening facing the outside of the vehicle, one straight end of which is connected to the vehicle's floor 600. A longitudinal beam sidewall connector 200 is connected to the U-shaped longitudinal beam 100, forming a closed cavity. A coil spring mounting plate 300 is located within the closed cavity and connected to the inner side of the U-shaped longitudinal beam 100. A shock absorber reinforcing plate 400 is located within the closed cavity; one end of the shock absorber reinforcing plate 400 is connected to the coil spring mounting plate 300, and the other end is connected to the longitudinal beam sidewall connector. The connecting piece 200 connects to the vehicle's floor 600 via one straight end of the U-shaped longitudinal beam 100. The longitudinal beam side panel connector 200 connects to the U-shaped longitudinal beam 100 to form a closed cavity for support. The coil spring mounting plate 300 is located inside the closed cavity and connects to three sides of the U-shaped longitudinal beam 100, providing effective support to the closed cavity. The shock absorber reinforcement plate 400 connects the coil spring mounting plate 300 and the rear longitudinal beam side panel connector 200, forming a good force transmission path, thus ensuring the stiffness and strength of the connection. The rear suspension mounting reinforcement plate 500 connects to the outside of the rear longitudinal beam and forms a stable cavity structure with the floor, providing a mounting position for the chassis. The vehicle longitudinal beam connection structure serves as the attachment point to the vehicle floor 600, improving the stiffness and strength of the attachment point and effectively enhancing vehicle performance.

[0038] This utility model embodiment also discloses a vehicle frame, including the vehicle longitudinal beam connection structure described above.

[0039] The vehicle's longitudinal beams connect to the suspension and shock absorbers, providing support for the vehicle and evenly distributing the loads from the vehicle body, passengers, cargo, and dynamic loads generated during driving (such as lateral forces during bumps and turns) to the wheels and suspension system, thus preventing localized stress concentrations that could lead to structural damage.

[0040] The frame can be integrated with the body design, resulting in lightweight construction and increased torsional rigidity, improving fuel economy and handling. Alternatively, the frame can be a freestanding monocoque structure, offering high load-bearing capacity and adaptability to heavy loads and harsh road conditions.

[0041] This utility model embodiment also discloses a vehicle, including: the vehicle longitudinal beam connection structure as described above or the vehicle frame as described above.

[0042] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0043] The present invention provides a detailed description of a vehicle longitudinal beam connection structure, a vehicle frame, and a vehicle. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A vehicle longitudinal beam connection structure, characterized in that, include: The U-shaped longitudinal beam has its opening side facing the outside of the vehicle. The U-shaped longitudinal beam includes two straight ends arranged opposite each other and a curved end located between the two straight ends, with one straight end connected to the vehicle's body floor. The longitudinal beam side connector is connected to the partially open side of the U-shaped longitudinal beam to form a closed cavity; A helical spring mounting plate is located in the enclosed cavity and is connected to the inner side of the U-shaped longitudinal beam; The lower end of the shock absorber reinforcing plate is located in the enclosed cavity; the lower end of the shock absorber reinforcing plate is connected to both the helical spring mounting base plate and the longitudinal beam side panel connector.

2. The vehicle longitudinal beam connection structure according to claim 1, characterized in that, Also includes: A reinforcing plate is installed behind the suspension, located on the outer side of the curved end of the U-shaped longitudinal beam; The rear suspension reinforcement plate is connected to the U-shaped longitudinal beam and the vehicle floor, respectively.

3. The vehicle longitudinal beam connection structure according to any one of claims 1-2, characterized in that, The helical spring mounting plate includes: The inner support plate of the helical spring mounting seat and the reinforcing plate of the helical spring mounting seat are connected sequentially to the inner side of the U-shaped longitudinal beam along the length of the vehicle. The inner support plate of the helical spring mounting base is connected to the side wall connector of the longitudinal beam.

4. The vehicle longitudinal beam connection structure according to claim 3, characterized in that, The shock absorber reinforcing plate is connected to the helical spring mounting plate and the longitudinal beam side panel connector by bolts.

5. The vehicle longitudinal beam connection structure according to claim 2, characterized in that, The rear suspension reinforcement plate, the U-shaped longitudinal beam, and the rear suspension reinforcement plate together form a cavity structure.

6. The vehicle longitudinal beam connection structure according to any one of claims 1-2, characterized in that, The U-shaped longitudinal beam and the side connecting parts of the longitudinal beam are made of high-strength steel formed by hot stamping.

7. The vehicle longitudinal beam connection structure according to any one of claims 1-2, characterized in that, The helical spring mounting plate and the shock absorber reinforcing plate are made of duplex cold-rolled galvanized steel sheet.

8. The vehicle longitudinal beam connection structure according to claim 2, characterized in that, The rear suspension reinforcement plate is made of duplex cold-rolled galvanized steel sheet.

9. A vehicle frame, characterized in that, include: The vehicle longitudinal beam connection structure as described in any one of claims 1-8.

10. A vehicle, characterized in that, include: The vehicle longitudinal beam connection structure as described in any one of claims 1-8 or the vehicle frame as described in claim 9.

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