CN116409386A - An aluminum alloy light truck frame assembly - Google Patents

Abstract

The invention discloses an aluminum alloy light truck frame assembly, which comprises a first longitudinal beam, a second longitudinal beam and a beam assembly, wherein the first longitudinal beam and the second longitudinal beam are C-shaped brackets with openings arranged oppositely, the C-shaped brackets comprise a first plane, a second plane and a third plane, the beam assembly comprises a first beam assembly, a second beam assembly, a third beam assembly, a fourth beam assembly, a fifth beam assembly, a sixth beam assembly, a seventh beam assembly and an eighth beam assembly which are sequentially arranged along the length direction of the longitudinal beam, and the beam assemblies are all fixed on the first plane, the second plane and the third plane through fastening assemblies. According to the invention, the first longitudinal beam, the second longitudinal beam and the cross beam assembly are designed, and the cross beam assembly is connected between the first longitudinal beam and the second longitudinal beam through the fastening assembly, so that the traditional steel frame is replaced, the maintenance is convenient, the magnesium-aluminum alloy is used as the material, the bearing capacity reaches the standard, the preparation quality of the whole vehicle is reduced, and the dynamic property of the vehicle is enhanced.

Description

An aluminum alloy light truck frame assembly

technical field

The invention relates to the field of light truck chassis, in particular to an aluminum alloy light truck frame assembly.

Background technique

Light trucks refer to N2 type vehicles with a maximum design total mass of not more than 4.5 tons among N type trucks in the vehicle classification. After more than 30 years of development, China's light truck industry has introduced foreign advanced light truck technology and production lines from low-end development to independent research and development and production of domestic high-end light truck products. After continuous rapid growth in the past two years, the high-end light truck market has shown a trend of vigorous development. .

At present, most of the light truck frames on the market are made of steel, and most of the steel frames are welded to make the frame integrally formed. Although the frame has an excellent load-carrying capacity, the mass of the vehicle is relatively large, and when the frame is damaged, maintenance is difficult. At the same time, it is extremely important to increase the load capacity and reduce the truck's own weight. And the higher the curb quality of the car, the greater the impact on the power of the car will be, and the fuel consumption per 100 kilometers will also increase accordingly. Therefore need a kind of lightweight light truck frame, to overcome above-mentioned defective.

Contents of the invention

Based on this, the object of the present invention is to provide an aluminum alloy light truck frame assembly, aiming to provide an aluminum alloy light truck frame assembly, which can reduce the dead weight of the vehicle body under the premise of ensuring the structural strength, thereby increasing the cargo loading capacity. Reduce fuel consumption.

In order to achieve the above object, the present invention is achieved through the following technical solutions: an aluminum alloy light truck frame assembly, characterized in that it includes a first longitudinal beam, a second longitudinal beam and a For the crossbeam assembly between the longitudinal beams, the first longitudinal beam, the second longitudinal beam and the crossbeam group are all made of magnesium-aluminum alloy, and the first longitudinal beam and the second longitudinal beam are oppositely arranged with openings The C-shaped bracket, the C-shaped bracket includes a first plane, a second plane and a third plane, and the beam assembly includes a first beam assembly, a second beam assembly, a third beam assembly arranged in sequence along the length direction of the longitudinal beam The beam assembly, the fourth beam assembly, the fifth beam assembly, the sixth beam assembly, the seventh beam assembly and the eighth beam assembly are fixed on the first plane, the Second plane and third plane.

To sum up, according to the aluminum alloy light truck frame assembly provided by the present invention, the first longitudinal beam, the second longitudinal beam and the cross beam assembly are designed, and the cross beam assembly is connected to the first longitudinal beam and the second cross beam assembly through the fastening assembly. Between the longitudinal beams, the traditional one-piece steel frame is replaced, which makes it easy to maintain, and the magnesium-aluminum alloy is used as the material to meet the load-carrying capacity, which greatly reduces the curb weight of the vehicle and enhances the power of the vehicle. Specifically, the aluminum alloy light truck frame assembly proposed by the present invention includes a first longitudinal beam, a second longitudinal beam, and a beam assembly arranged between the first longitudinal beam and the second longitudinal beam, the first longitudinal beam and the second longitudinal beam The longitudinal beam is a C-shaped bracket with opposite openings. The C-shaped bracket includes a first plane, a second plane and a third plane, and the first beam assembly, the second beam assembly, the third beam assembly, The fourth beam assembly, the fifth beam assembly, the sixth beam assembly, the seventh beam assembly and the eighth beam assembly are all fixed on the first plane, the second plane and the third plane by fastening components . The C-shaped bracket can be flexibly connected to each mounting bracket of the beam assembly, has strong versatility, and has good stability and strength so that the vehicle frame can meet the load-bearing requirements.

Further, the side of the second plane away from the opening is provided with a front leaf spring front support, a front leaf spring rear support, a rear leaf spring front support and a rear leaf spring rear support, and the leaf spring supports are used Used to connect the leaf spring bracket in the car suspension.

Further, a reinforcement plate is arranged on the inner side of the longitudinal beam between the front support of the front leaf spring and the rear support of the front leaf spring, and the reinforcement plate is fixed to the second plane and the rear support of the front leaf spring through fasteners. the third plane.

Further, the first beam assembly is arranged at the ends of the first longitudinal beam and the second longitudinal beam, and the two ends of the first beam assembly are respectively fixed on the first plane and the third plane.

Further, the second beam assembly and the third beam assembly are arranged between the front support of the front leaf spring and the rear support of the front leaf spring along the direction of the longitudinal beam, and the second beam assembly The mounting brackets at two ends are respectively fixed on the first plane and the third plane.

Further, the mounting brackets at both ends of the third beam assembly are fixed to the third plane and the reinforcing bracket, and the two ends of the reinforcing bracket are respectively connected to the mounting brackets of the third beam assembly and the second plane.

Further, the fourth crossbeam assembly and the fifth crossbeam assembly are arranged between the rear support of the front leaf spring and the front support of the rear leaf spring along the direction of the longitudinal beam, and the fourth crossbeam assembly includes a fourth The upper beam and the fourth lower beam, both ends of the fourth upper beam and the fourth lower beam are fixed on the second plane.

Further, the fifth beam assembly, the sixth beam assembly and the seventh beam assembly all include a C-shaped beam and mounting pieces provided at both ends of the C-shaped beam, and the mounting pieces are connected to the first plane and the second plane.

Further, both ends of the eighth beam assembly are fixed on the first plane and the second plane.

Further, a stopper for restricting the leaf spring is provided between the front support of the rear leaf spring and the rear support of the rear leaf spring, and the stopper is fixed to the second plane by fasteners.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 and Fig. 2 are the structural representations of light truck frame among the one embodiment of the present invention;

The structural schematic diagram of Fig. 3 stringer;

Fig. 4 is a structural schematic diagram of the first beam assembly;

Fig. 5 is a structural schematic diagram of the second beam assembly;

Fig. 6 is a structural schematic diagram of the fourth beam assembly;

Fig. 7 is a structural schematic diagram of the eighth beam assembly;

Fig. 8 is the mechanical properties of materials used in the present invention;

Fig. 9 is the CAE analysis result of the stiffness mode of the present invention;

Fig. 10 is the strength CAE analysis result of the present invention.

Explanation of symbols of attached parts and components:

First longitudinal beam 11, second longitudinal beam 12, reinforcing plate 13, first plane 14, second plane 15, third plane 16, first beam assembly 21, second beam assembly 22, third beam assembly 23. The fourth beam assembly 24, the fourth upper beam assembly 241, the fourth lower beam assembly 242, the fifth beam assembly 25, the sixth beam assembly 26, the seventh beam assembly 27, the eighth beam assembly 28, the front Leaf spring front support 31, front leaf spring rear support 32, rear leaf spring front support 33, rear leaf spring rear support 34, stop block 35.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Several embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

It should be noted that when an element is referred to as being “fixed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to Figures 1-10, which show a schematic structural view of an aluminum alloy light truck frame assembly provided in an embodiment of the present invention. The aluminum alloy light truck frame assembly includes a first longitudinal beam 11, a second longitudinal beam 12 and the beam assembly arranged between the first longitudinal beam 11 and the second longitudinal beam 12, wherein:

As shown in Figures 1-3, the first longitudinal beam 11, the second longitudinal beam 12 and the cross beam assembly are all made of magnesium-aluminum alloy, and the first longitudinal beam 11 and the second longitudinal beam 12 It is a C-shaped bracket with opposite openings. The C-shaped bracket includes a first plane 14, a second plane 15, and a third plane 16. The first plane 14 and the third plane 16 are arranged in parallel. The planes are vertically disposed between the first plane 14 and the third plane 16 . The beam assembly includes a first beam assembly 21, a second beam assembly 22, a third beam assembly 23, a fourth beam assembly 24, a fifth beam assembly 25, and a sixth beam assembly arranged in sequence along the longitudinal beam length direction. The beam assembly 26, the seventh beam assembly 27 and the eighth beam assembly 28 are all fixed to the first plane 14, the second plane 15 and the third plane 16 by fastening components to complete the assembly of the vehicle frame .

On the outside of the first longitudinal beam 11 and the second longitudinal beam 12, along the length direction of the longitudinal beam, there are sequentially provided a front leaf spring front support 31, a front leaf spring rear support 32, a rear leaf spring front support 33 and a rear leaf spring Rear support 34, described leaf spring support is used to connect the leaf spring support in the automobile suspension system, and also is provided with usefulness between the described rear leaf spring front support 33 and described rear leaf spring rear support 34 The auxiliary spring stopper 35 used to limit the excessive range of jumping of the leaf spring. Both the above plate-shaped support and the auxiliary spring stop block 35 are fixed on the second plane 15 of the longitudinal beam through a fastening assembly. The fastening components are currently conventional bolts and nuts, assembled by bolts and nuts, which can effectively reduce the risk of frame cracking caused by bumps during long-distance driving, and compared with the traditional one-piece steel frame, the invention provides The frame is convenient for later disassembly, installation and maintenance of the frame, avoiding the situation of direct replacement of the whole due to the damage of some parts, and reducing the maintenance cost.

In order to improve the bending and torsional rigidity of the vehicle frame, a reinforcing plate 13 is provided on the inside of the first longitudinal beam 11 and the second longitudinal beam 12 between the front support 31 of the front leaf spring and the rear support 32 of the front leaf spring, The reinforcing plate 13 is an L-shaped bracket, and the reinforcing plate 13 is fixed on the second plane 15 and the third plane 16 by a fastening assembly, so that the reinforcing plate 13 is fixed to the inner side of the stringer and strengthens the stringer The bending and torsional rigidity improves the stability of the entire frame.

According to Fig. 4 and Fig. 5, the first crossbeam assembly 21 and the eighth crossbeam assembly 28 are all C-shaped crossbeams, which are respectively arranged at the two ends of the two longitudinal beams, and the openings are all arranged inwardly. The first crossbeam assembly 21 and the upper and lower end surfaces of the eighth beam assembly 28 are fixed to the first plane 14 and the third plane 16 of the longitudinal beam by fastening components, and at the same time, because the two ends of the first beam assembly 21 and the eighth beam assembly 28 extend into Between the first plane 14 and the third plane 16, and against the second plane 15, it plays the role of supporting the longitudinal beam and enhances the internal stability of the first longitudinal beam 11 and the second longitudinal beam 12 , improving the reliability of the frame.

The second crossbeam assembly 22 and the third crossbeam assembly 23 are arranged between the front leaf spring front support 31 and the front leaf spring rear support 32 along the longitudinal beam direction, and the second crossbeam assembly 22 The main body is extruded into a circular tube, and the mounting brackets at both ends are penetrated into the first longitudinal beam 11 and the second longitudinal beam 12 respectively, and are fixed to the first plane 14 and the third plane 16 by fastening components . The front support 31 of the front leaf spring is arranged at both ends of the second beam assembly 22, and is fixed on the outside of the second plane 15 and the third plane 16 of the longitudinal beam by using fastening components. The mounting bracket of the second beam assembly 22 and the front leaf spring support 31 are jointly fixed at the same axial position of the total amount, and the first plane 14, the second plane 15 and the third plane 16 of the same axial position pass through The fastening components are connected to strengthen the axial support stress of the longitudinal beam, meet the torsional rigidity index of the frame, and ensure that the frame is sufficient to support the preset load capacity.

Both ends of the third beam assembly 23 are fixed to the third plane 16 by fastening components, and the third beam assembly 23 is integrally arranged on the lower end surface of the longitudinal beam. The part of the longitudinal beam is also connected with an L-shaped mounting bracket. One end of the mounting bracket is fixed outside the second plane 15, and the other end is connected to both ends of the third beam assembly.

The fourth beam assembly 24 and the fifth beam assembly 25 are arranged between the rear support 32 of the front leaf spring and the front support 33 of the rear leaf spring along the direction of the longitudinal beam. The fourth beam assembly 24 includes a fourth upper beam 241 and a fourth lower beam 242, the fourth upper beam 241 and the fourth lower beam 242 are connected as a whole by a fastening assembly, the fourth upper Both ends of the crossbeam 241 are fixed on the second plane 15 close to the end of the first plane 14 and abut against the first plane 14, and both ends of the fourth lower crossbeam 242 are fixed on the second plane 15 close to the third plane 16 and abut against the third plane 16. Since the fourth upper beam 241 and the fourth lower beam 242 are both U-shaped brackets, the force on the two ends of the longitudinal beam is evenly distributed to the entire fourth beam assembly 24 through the U-shaped structure, and the U-shaped structure improves the fourth beam assembly. 24% load-bearing capacity, and at the same time, its two ends support the first plane 14 and the third plane 16, ensuring the stability of the longitudinal beam.

The fifth crossbeam assembly 25, the sixth crossbeam assembly 26 and the seventh crossbeam assembly 27 all include a C-shaped crossbeam and mounting pieces located at both ends of the C-shaped crossbeam, and the mounting pieces are respectively arranged on the C-shaped crossbeam upper and lower ends. One end of the mounting piece is fixed to the C-shaped beam, and the other end is fixed to the first plane 14 or the third plane 16 inside the longitudinal beam, and the C-shaped beam is supported between the mounting pieces on the upper and lower end faces to ensure its structure Stability and load carrying capacity. The front support 33 of the rear leaf spring is arranged at both ends of the sixth beam assembly 26 , and the rear support 34 of the rear leaf spring is arranged at both ends of the seventh beam assembly 27 .

The above-mentioned beam assembly improves the structural stability of the longitudinal beam by being arranged on the first plane 14 and the third plane 16 inside the longitudinal beam, and at the same time, a reinforcing plate is provided on the second plane 15 to enhance the support of the second plane 15 capacity, thereby greatly increasing the load-carrying capacity of the frame.

It is worth noting that the first longitudinal beam, the second longitudinal beam and the beam assembly in the aluminum alloy light truck frame assembly of the present invention are all high-strength magnesium-aluminum alloys, and the material grades are as follows: 5052-H32, 6061-T6 , 6082-T6, etc., and the rest of the parts maintain the original design materials, such as B510L/QSTE650TM, etc.

At the same time, in order to test whether the rigidity of the frame meets the production requirements, the rigidity analysis, strength analysis and fatigue analysis are also evolved:

Stiffness analysis: establish the finite element model according to the data structure of the present invention, adopt the linear static analysis method, impose constraints on the midpoint of the first beam and the central point of the rear leaf spring respectively, and apply the torque around the X axis at the midpoint of the front leaf spring installation Analyze the torsional stiffness of aluminum alloy frame. Constrain the freedom of movement of the left rear support point of the leaf spring in the X, Y, and Z directions, constrain the movement freedom of the right rear support point of the leaf spring in the X and Z directions, and constrain the movement freedom of the left front support point of the leaf spring in the Y and Z directions. The Z-direction movement degree of freedom of the right rear support point of the leaf spring. The bending stiffness of the aluminum alloy frame is analyzed by applying vertical loads at the center points of the front and rear leaf springs corresponding to the left/right longitudinal beams. In order to improve the bending and torsional rigidity of the aluminum alloy frame, a reinforcing plate can be added inside the longitudinal beam to increase the material thickness of the part. The analysis results are shown in Figure 8, which meets the design and issuance requirements.

Intensity analysis: according to the model of the present invention, the inertial release method is adopted to carry out strength CAE analysis and calculation, and the model is unconstrained; the input load is the output result of ADAMS calculation, which is divided into 11 working conditions for calculation: 1. Static working condition (static), 2. Braking (brake), 3. Cornering (cornering), 4. Cornering brake (cornering_brake), 5. Left front wheel up (FL), 6. Right front wheel up (FR), 7. Left rear wheel up Lift (RL), 8. Lift the right rear wheel (RR), 9. Lift the left front and right rear wheels (FL_RR), 10. Lift the right front, left and rear wheels (FR_RL), 11. Jump (bump).

Fatigue analysis: use inertia release method in static linear finite element analysis, apply unit load on hard point: Fx=1N, Fy=1N, Fz=1N; Mx=1Nmm, My=1Nmm, Mz=1Nmm, obtained by virtual iteration The road load spectrum is used to calculate the fatigue damage value of the frame.

Acceptance criteria for CAE fatigue analysis are: fatigue damage value <1. For the area with a fatigue damage value>1, after optimization, the analysis results show that the overall fatigue damage value of the vehicle frame assembly of the present invention is <1, which meets the fatigue issuance requirements.

To sum up, according to the aluminum alloy light truck frame assembly provided by the present invention, the first longitudinal beam, the second longitudinal beam and the cross beam assembly are designed, and the cross beam assembly is connected to the first longitudinal beam and the second cross beam assembly through the fastening assembly. Between the longitudinal beams, the traditional one-piece steel frame is replaced, which makes it easy to maintain, and the magnesium-aluminum alloy is used as the material to meet the load-carrying capacity, which greatly reduces the curb weight of the vehicle and enhances the power of the vehicle. Specifically, the aluminum alloy light truck frame assembly proposed by the present invention includes a first longitudinal beam, a second longitudinal beam, and a beam assembly arranged between the first longitudinal beam and the second longitudinal beam, the first longitudinal beam and the second longitudinal beam The longitudinal beam is a C-shaped bracket with opposite openings. The C-shaped bracket includes a first plane, a second plane and a third plane, and the first beam assembly, the second beam assembly, the third beam assembly, The fourth beam assembly, the fifth beam assembly, the sixth beam assembly, the seventh beam assembly and the eighth beam assembly are all fixed on the first plane, the second plane and the third plane by fastening components . The C-shaped bracket can be flexibly connected to each mounting bracket of the beam assembly, has strong versatility, and has good stability and strength so that the vehicle frame can meet the load-bearing requirements.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. The utility model provides an aluminum alloy light truck frame assembly, its characterized in that includes first longeron, second longeron and locates beam assembly between first longeron and the second longeron, first longeron the second longeron with the crossbeam group all uses magnesium aluminum alloy, first longeron with the second longeron is the C type support that the opening set up relatively, C type support includes first plane, second plane and third plane, beam assembly includes first beam assembly, second beam assembly, third beam assembly, fourth beam assembly, fifth beam assembly, sixth beam assembly, seventh beam assembly and eighth beam assembly that arrange in proper order along longeron length direction, beam assembly all is fixed in first plane, second plane and third plane through fastening assembly.

2. The aluminum alloy light truck frame assembly of claim 1 wherein a side of said second plane remote from said opening is provided with a front leaf spring front mount, a front leaf spring rear mount, a rear leaf spring front mount and a rear leaf spring rear mount, the leaf spring mounts being for attachment to leaf spring brackets in an automotive suspension.

3. The aluminum alloy light truck frame assembly of claim 1 wherein said rail inner side is provided with a reinforcement plate between said front leaf spring front mount and said front leaf spring rear mount, said reinforcement plate being secured to said second and third planes by fasteners.

4. The aluminum alloy light truck frame assembly of claim 1 wherein said first cross member assembly is disposed at an end of said first longitudinal beam and said second longitudinal beam, and wherein both ends of said first cross member assembly are secured to said first plane and said third plane, respectively.

5. The aluminum alloy light truck frame assembly of claim 1, wherein the second and third beam assemblies are disposed between the front leaf spring front mount and the front leaf spring rear mount along a longitudinal beam direction, and wherein mounting brackets at both ends of the second beam assembly are respectively secured to the first and third planes.

6. The aluminum alloy light truck frame assembly of claim 5 wherein the mounting brackets at the ends of the third beam assembly are secured to a third plane and a reinforcing bracket, the ends of the reinforcing bracket being connected to the mounting brackets and the second plane of the third beam assembly, respectively.

7. The aluminum alloy light truck frame assembly of claim 1, wherein the fourth and fifth beam assemblies are disposed between the front leaf spring rear mount and the rear leaf spring front mount along a rail direction, the fourth beam assembly comprising a fourth upper beam and a fourth lower beam, both ends of the fourth upper beam and the fourth lower beam being secured to a second plane.

8. The aluminum alloy light truck frame assembly of claim 1, wherein the fifth, sixth and seventh beam assemblies each comprise a C-beam and mounting tabs provided on both ends of the C-beam, the mounting tabs being connected to the first and second planes.

9. The aluminum alloy light truck frame assembly of claim 1 wherein the eighth beam assembly is secured at both ends to the first and second planes.

10. The aluminum alloy light truck frame assembly of claim 2 wherein a stop block is provided between said rear leaf spring forward mount and said rear leaf spring aft mount for limiting the leaf spring, said stop block being secured to the second planar surface by a fastener.

Images