Connecting structure for aluminum alloy top-mounted chassis of commercial vehicle

Abstract

The utility model relates to an aluminum alloy top-mounted chassis connecting structure for a commercial vehicle. The periphery of a chassis is defined by frame beams, floor profiles are laid in the middle of the frame beams, a plurality of cross beams are erected below the floor profiles, the two ends of each cross beam are inserted into the inner sides of the frame beams, and a plurality of longitudinal beams are arranged below the cross beams to form a longitudinal and transverse supporting structure. The bottom frame structure is obtained by inserting, screwing and fixing aluminum profiles, and has the advantages of being light in weight, firm in structure, convenient and fast to assemble and install and the like. Assembling is convenient, interchange and universality of components are facilitated, meanwhile, production efficiency can be improved, and the device is suitable for batch production; and welding process manufacturing can be avoided, and the advantages of small deformation, high strength and the like are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile components, in particular to a commercial vehicle aluminum alloy upper and lower frame connection structure. Background Art

[0002] Existing vans are mostly made of steel, which are heavy and energy-intensive, making it difficult to adapt to increasingly stringent emission regulations. Replacing steel with aluminum has become an important lightweight method for flatbed trucks under the new energy trend. Existing aluminum alloy cargo compartments are mostly welded or riveted structures, which are not conducive to rapid assembly and single component maintenance and replacement; in addition, the existing aluminum alloy compartments have poor connection strength and overall stability, and it is difficult to ensure safety and reliability during the service life, which is in urgent need of improvement.

[0003] The chassis is the supporting part of the entire car body. It is installed at the bottom of the car body and bears the entire weight of the cargo. It is an important part of the car body. The design difficulty lies in: how to ensure the load-bearing capacity of the bottom plate while reducing weight; in addition, a firm and stable connection must be achieved between the chassis and the front, rear, left and right side panels to achieve the overall structural stability of the entire van body. The above are all design problems that must be overcome on the road to lightweighting of aluminum alloy van trucks. Summary of the invention

[0004] The purpose of the utility model is to provide an aluminum alloy upper frame connection structure for commercial vehicles, which adopts an aluminum profile lightweight structure design, has a significant weight reduction effect, a solid overall structure, and reliable connection; it is easy to assemble, improves production efficiency, and is suitable for mass production; it can avoid the use of welding technology, and has the advantages of small deformation and high strength.

[0005] In order to achieve the above object, the technical solution of the utility model is as follows:

[0006] The invention discloses a connection structure of an aluminum alloy upper frame of a commercial vehicle. The frame is surrounded by frame beams on all sides. A floor profile is laid in the middle of the frame beams. A plurality of cross beams are set under the floor profiles. Both ends of the cross beams are connected to the inner side of the frame beams. A plurality of longitudinal beams are arranged under the cross beams to form a longitudinal and transverse support structure.

[0007] The longitudinal beam is a groove-shaped open-cavity aluminum profile, and the anti-slope profile is installed at intervals in the groove. The anti-slope profile is used to support the inner cavity of the longitudinal beam profile to prevent the longitudinal beam profile from deforming due to the non-closed cavity; the closed multi-cavity structure of the previous aluminum alloy longitudinal beam is changed to effectively reduce the total weight of the longitudinal beam, thereby achieving a significant weight reduction of the longitudinal beam, and the reduction in its load-bearing capacity is not obvious.

[0008] A connector is provided at the connection between the longitudinal beam and the cross beam, and the connector passes through the horizontal part of the connector, the longitudinal beam and the sliding pad in sequence through a longitudinal bolt to fasten the three. The ends of the vertical part of the connector are provided with a hook shape to match the grooves embedded in the two sides of the cross beam profile; the sliding pad is used to thicken the position pressed by the nut to prevent the nut from directly pressing on the longitudinal beam profile and causing damage to the longitudinal beam.

[0009] The lower end surface of the longitudinal beam is provided with a rubber pad, and the lower part of the rubber pad is connected to the chassis of the automobile, which can reduce the vibration brought by the chassis to the upper part of the car body and absorb the vibration energy.

[0010] Three-way plug rods are arranged at the four corners of the chassis and the side doors. The horizontal part of the three-way plug rod is plugged into the inner cavity of the frame beam, and the vertical part is plugged into the inner cavity of the carriage side beam, so that the connection is more firm. The upper end surface of the frame beam can also be provided with a dowel bar to facilitate the subsequent plugging and fixing of the cavity of the carriage side panel profile with the dowel bar.

[0011] Advantages of utility models

[0012] 1. The chassis of the utility model is made of extruded aluminum profiles, which have the advantages of high structural strength and high lightness. Compared with the steel truck chassis, the rigidity and strength are not greatly reduced, and the energy-saving and emission-reduction effects are obvious.

[0013] 2. The longitudinal beam of the utility model adopts the design of grooved open cavity aluminum profile + anti-bank profile, which not only maintains the cross-sectional height of the longitudinal beam, but also greatly reduces the weight compared with the fully closed cavity profile longitudinal beam, further realizing the weight reduction of the car body; and the load-bearing capacity of the car body still meets the standard.

[0014] 3. The connection nodes of the utility model adopt the connection method of plug-in, clip-on or screw-on connection, which effectively solves the deformation problem of aluminum alloy components caused by welding and improves the connection strength and the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall facade structure of the utility model;

[0016] Figure 2 for Figure 1 The enlarged structural diagram at position Ⅰ in the middle;

[0017] Figure 3 This is a schematic diagram of the overall facade structure of the utility model;

[0018] Figure 4 for Figure 3 The enlarged structural diagram at the middle II;

[0019] Figure 5 for Figure 3 The enlarged structural diagram at position Ⅲ in the middle;

[0020] Figure 6 This is a schematic diagram of the longitudinal beam cross-section structure; (with anti-bankment profile segments)

[0021] Figure 7 This is a schematic diagram of the elevation result of the connector component;

[0022] Figure 8 It is a schematic diagram of the exploded structure of the plug-in rod connection;

[0023] The serial numbers and component names in the figure are: 1-frame beam; 12-three-way plug rod; 13-corner edging; 2-cross beam; 31-longitudinal beam; 32-anti-bankment profile; 33-rubber pad; 34-sliding pad; 4-connector; 5-floor profile. DETAILED DESCRIPTION

[0024] A commercial vehicle aluminum alloy upper chassis connection structure, the chassis is surrounded by frame beams 1, a floor profile 5 is laid in the middle of the frame beam 1, a plurality of cross beams 2 are set under the floor profile 5, both ends of the cross beams 2 are connected to the inner side of the frame beam 1, and a plurality of longitudinal beams 31 are arranged under the cross beams 2 to form a longitudinal and transverse support structure.

[0025] The longitudinal beam 31 is a groove-shaped open-cavity aluminum profile, and the anti-bank profile 32 is installed at intervals in the groove.

[0026] A connector 4 is provided at the connection between the longitudinal beam 31 and the cross beam 2 . The connector 4 passes through the horizontal portion of the connector 4 , the longitudinal beam 31 and the sliding pad 34 in sequence through longitudinal bolts to fasten the three together.

[0027] A rubber pad 33 is disposed on the lower end surface of the longitudinal beam 31 .

[0028] Three-way plug rods 12 are arranged at the four corners of the base frame and the side door.

Claims

1. A commercial vehicle aluminum alloy upper frame connection structure, characterized in that: The bottom frame is surrounded by frame beams (1) on all sides, a floor profile (5) is laid in the middle of the frame beams (1), a plurality of cross beams (2) are erected below the floor profiles (5), both ends of the cross beams (2) are connected to the inner side of the frame beams (1), and a plurality of longitudinal beams (31) are arranged below the cross beams (2) to form a longitudinal and transverse support structure.

2. The commercial vehicle aluminum alloy upper and lower frame connection structure according to claim 1 is characterized in that: The longitudinal beam (31) is a groove-shaped open-cavity aluminum profile, and the anti-bank profile (32) is installed at intervals in the groove.

3. The commercial vehicle aluminum alloy upper and lower frame connection structure according to claim 1, characterized in that: A connecting piece (4) is provided at the connection between the longitudinal beam (31) and the cross beam (2), and the connecting piece (4) passes through the horizontal part of the connecting piece (4), the longitudinal beam (31) and the sliding pad (34) in sequence through a longitudinal bolt to fasten the three together.

4. The commercial vehicle aluminum alloy upper and lower frame connection structure according to claim 1, characterized in that: A rubber pad (33) is provided on the lower end surface of the longitudinal beam (31).

5. The commercial vehicle aluminum alloy upper and lower frame connection structure according to claim 1, characterized in that: Three-way plug rods (12) are arranged at the four corners of the base frame and the side door.

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