Lightweight composite material bearing frame

Abstract

The invention relates to the field of traffic logistics transportation, in particular to a lightweight composite material bearing frame. The device comprises a base and a supporting piece set. The base comprises an outer frame and an inner frame and is made of glass fiber composite materials. The supporting piece set comprises first supporting units and second supporting units which are arranged on the base in pairs, the first supporting units and the second supporting units are arranged in rows and support the steel coil from the two sides of the bottom of the steel coil, and main supporting structures of the first supporting units and the second supporting units are made of basalt fiber composite materials. Triple breakthroughs of light weight, corrosion resistance and high reliability are achieved, and a key technical path is provided for upgrading of bulk cargo transportation equipment.

Description

Technical Field

[0001] This invention relates to the field of transportation and logistics, and in particular to a lightweight composite material vehicle frame. Background Technology

[0002] In the transportation and logistics sector, the efficiency and cost control of transporting heavy goods such as steel coils have always been key issues for industry development. Traditional steel transport frames, while meeting basic load-bearing requirements due to their steel-based structural material, suffer from excessive weight due to steel's high density, severely limiting load capacity, increasing unit transportation costs, and simultaneously increasing fuel consumption and carbon emissions. Furthermore, steel is highly susceptible to electrochemical corrosion in complex transportation environments such as those involving humidity, acids, alkalis, and salts. Even with protective measures like painting and galvanizing, corrosion after coating damage is difficult to prevent, shortening frame lifespan, potentially leading to structural failure and safety hazards. During transport, when vehicles encounter impacts such as bumps, sudden braking, and collisions, steel frames, due to their high rigidity and limited energy absorption capacity, are prone to stress concentration, resulting in localized deformation or fatigue cracks, significantly reducing structural reliability over long-term use. As the logistics industry continues to demand higher efficiency, safety, and economy in transportation, traditional steel frames are no longer sufficient to meet market needs.

[0003] In recent years, glass fiber resin-based composites have been increasingly applied in the transportation equipment field due to their excellent comprehensive performance. This material has a density only about 1 / 4 to 1 / 3 that of steel, exhibiting significant lightweight characteristics and making it an important material choice for achieving structural weight reduction. Through reasonable structural design and configuration optimization, glass fiber composites can not only effectively reduce the self-weight of the chassis but also significantly improve cargo loading capacity without increasing the overall vehicle weight. Simultaneously, with resin as the matrix and glass fiber as the reinforcement, this material possesses good corrosion resistance and processability, can resist long-term erosion by acids, alkalis, and salts, reducing maintenance costs, extending structural service life, and also has certain impact toughness and energy absorption capacity. Basalt fiber composites, while maintaining a low density, exhibit superior mechanical properties. Made from high-temperature melted and drawn natural basalt, it possesses higher tensile strength and elastic modulus, demonstrating superior structural stability and reliability compared to glass fiber, especially under high loads, high impacts, or harsh environments. Basalt fiber composites also possess excellent dimensional stability, high-temperature resistance, and corrosion resistance, making them suitable as key component materials in load-bearing paths, used to reinforce structural nodes, braces, and other areas of significant stress. Therefore, comprehensively utilizing the lightweight advantages of glass fiber materials and the high strength and high modulus properties of basalt fiber materials to construct a lightweight, high-performance composite material load-bearing frame suitable for heavy-duty working conditions is a key direction for the development of green and efficient transportation equipment. Summary of the Invention

[0004] To address the problems existing in the background technology, a lightweight composite material load-bearing frame is proposed, including a base and a support assembly. The base includes an outer frame and an inner frame, made of glass fiber composite material. The support assembly includes a pair of support unit one and support unit two arranged on the base, with multiple sets of support unit one and support unit two arranged in rows, providing support from both sides of the bottom of the steel coil. The main support structure of support unit one and support unit two is made of basalt fiber composite material.

[0005] Preferably, the support unit 1 includes three sets of A-frame support frames 1 for bearing loads. The adjacent A-frame support frames 1 are spaced 30mm apart and are connected by adhesive strips 1 and rivets.

[0006] Preferably, the short side of the A-frame support has an angle of 52° with the horizontal plane, a cross-sectional size of 70*100mm, a wall thickness of 4mm, and a 6mm thickened section 103 is provided at a distance of 150mm from the bottom of both sides.

[0007] Preferably, the support unit 2 includes three sets of A-frame support frames 2 for bearing loads. The adjacent A-frame support frames 2 are spaced 30mm apart and are connected by adhesive resin to the connecting pieces 2, and then connected with rivets.

[0008] Preferably, the angle between the two long sides of the A-frame support and the horizontal plane is 38°, the cross-sectional dimensions are 70*100mm, the wall thickness is 4mm, and a 6mm thickened section 203 is provided at a distance of 150mm from the bottom of both sides.

[0009] Preferably, each of the three pairs of A-frame support frame one and the three pairs of A-frame support frame two is covered with a layer of composite board, and the contact surface with the steel coil is covered with a 12mm heat-insulating rubber pad.

[0010] Preferably, A-frame 1 and A-frame 2 use materials with a density of 2.2 g / cm³. 3 It is made of basalt fiber composite material.

[0011] Preferably, the outer frame uses profiles with a cross-sectional dimension of 100*100mm and a wall thickness of 5mm; the inner frame uses profiles with a cross-sectional dimension of 70*70mm and a wall thickness of 5mm; the overall dimensions of the base are 4260*2790mm, and the material has a density of 1.9g / cm³. 3 It is made of glass fiber composite material.

[0012] Preferably, the connection between the outer frame and the inner frame is reinforced by using resin adhesive to bond the connecting piece three, and then using rivets; the connecting piece three has a thickness of 8mm and an extension length of 50mm.

[0013] Preferably, the base has limiting slots and hoisting components on both sides.

[0014] Compared with existing technologies, this invention has the following beneficial technical effects: This frame achieves significant weight reduction while ensuring load-bearing safety through breakthroughs in both material innovation and structural design. The main structure uses materials with a density of only 1.9 g / cm³. 3 The glass fiber composite base, with support units made of 2.2 g / cm³ 3 The basalt fiber composite material, combined with the special angle design and locally thickened structure of the A-frame support, significantly reduces the vehicle's weight. Simulation verification also proves its good load-bearing capacity. The reduced frame weight increases the net cargo capacity per trip, significantly reducing unit freight costs. Simultaneously, the corrosion-resistant properties of the glass fiber and basalt fiber composite material completely solve the rust problem of steel frames, eliminating the need for regular rust prevention treatments and welding repairs. This represents a triple breakthrough in lightweighting, corrosion resistance, and high reliability, providing a key technological path for upgrading bulk cargo transportation equipment. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a lightweight composite material load-bearing vehicle frame.

[0016] Figure 2 Top view of a lightweight composite material load-bearing vehicle frame;

[0017] Figure 3 Internal structural diagrams of support unit one and support unit two;

[0018] Figure 4 This is a structural diagram of the outer frame, inner frame, and connecting piece.

[0019] Figure 5 Simulation verification results under stress Figure 1 ;

[0020] Figure 6 Simulation verification results under stress Figure 2 ;

[0021] Figure 7 Simulation verification results under stress Figure 3 .

[0022] Reference numerals in the attached drawings: 1. Support unit one; 101. A-frame support one; 102. Connecting piece one; 103. Thickened section one; 2. Support unit two; 201. A-frame support two; 202. Connecting piece two; 203. Thickened section two; 3. Outer frame; 4. Inner frame; 5. Connecting piece three. Detailed Implementation

[0023] like Figures 1-2As shown, this invention proposes a lightweight composite material load-bearing vehicle frame, including a base and a support assembly. The base includes an outer frame 3 and an inner frame 4, made of glass fiber composite material; the support assembly includes a pair of support units 1 and 2 arranged on the base, and multiple sets of support units 1 and 2 are arranged in rows to provide support from both sides of the bottom of the steel coil. The main support structure of support units 1 and 2 is made of basalt fiber composite material.

[0024] like Figure 3 As shown, support unit 1 includes three sets of A-frame support frames 101 for load-bearing. Adjacent A-frame support frames 101 are spaced 30mm apart and connected by adhesive bonding pieces 102 and rivets. The short side of each A-frame support frame 101 forms a 52° angle with the horizontal plane, has a cross-sectional dimension of 70*100mm, a wall thickness of 4mm, and a 6mm thickened section 103 is provided at a distance of 150mm from the bottom edge on both sides.

[0025] Support unit 2 includes three sets of A-frame support frames 201 for load bearing. Adjacent A-frame support frames 201 are spaced 30mm apart and connected by adhesive bonding pieces 202 and rivets. The long side of the A-frame support frame 201 forms an angle of 38° with the horizontal plane, has a cross-sectional dimension of 70*100mm, a wall thickness of 4mm, and a 6mm thickened section 203 is provided at a distance of 150mm from the bottom edge on both sides.

[0026] Adhesive bonding combined with rivets is used to enhance joint performance. By increasing the contact area between the A-frame support 101 and A-frame support 201 and the base, the stress concentration at the connection point is reduced.

[0027] It should be further noted that the three pairs of A-frame support frames 101 and 201 are all covered with a layer of composite material to enhance the overall support, and the contact surface with the steel coil is covered with a 12mm heat-insulating rubber pad.

[0028] It should be further noted that the A-frame support 101 and A-frame support 201 use materials with a density of 2.2 g / cm³. 3 It is made of basalt fiber composite material.

[0029] like Figure 4 As shown, the outer frame 3 uses profiles with a cross-sectional dimension of 100*100mm and a wall thickness of 5mm; the inner frame 4 uses profiles with a cross-sectional dimension of 70*70mm and a wall thickness of 5mm; the overall dimensions of the base are 4260*2790mm, and it uses a material with a density of 1.9g / cm³. 3 It is made of glass fiber composite material. The connection between the outer frame 3 and the inner frame 4 is reinforced by using resin adhesive to bond the connecting piece 3 5 and rivets; the connecting piece 3 5 is 8mm thick and has an extension length of 50mm.

[0030] like Figure 1 As shown, the base has limit slots and lifting components on both sides. It is made of steel to enhance the wear resistance of the structure. It is connected to the main frame with square buckles and bolts for easy replacement.

[0031] The load-bearing performance of the vehicle frame structure of the exemplary embodiment of the present invention will be further described below.

[0032] The structure was verified using finite element simulation software. The minimum mesh size was 20mm, and the maximum was 100mm. The overall mesh size was 82w (determined based on mesh independence analysis, reducing computational load while ensuring accuracy). Boundary conditions were: fixed bottom end pads and side limit latches; gravity was converted into a downward resultant force; and loads were added to the contact area between the steel coil and the frame, with the top offset downwards by 80mm. Material parameters were selected as follows: glass fiber composite material with a Young's modulus of 40GPa and a Poisson's ratio of 0.3; and steel with a Young's modulus of 201GPa and a Poisson's ratio of 0.33. Three load application methods were used.

[0033] 1. 1.5 times the gravitational load downwards

[0034] Left side: 20 * 1.1 * 1000 * 9.8 = 274400 N

[0035] Right side: 14 * 1.4 * 1000 * 9.8 = 192080 N

[0036] 2. Simultaneously apply 1 times the gravity and an equivalent gravitational impact force in the direction of gravity.

[0037] Left side: 20 * 1000 * 9.8 + 298920 = 30460 N

[0038] Right side: 14 * 1000 * 9.8 + 76020 = 213220 N

[0039] 3. Lateral impact load along the long axis of the chassis

[0040] Left side: 298920N

[0041] Right side: 209240N

[0042] The lateral impact load here is applied to the contact surface of the two supports on one side of the impact direction. Figures 5-7 The simulation results under three stress conditions are as follows: The maximum stress and displacement of the structure under the three conditions are shown below.

[0043] 1.278.5 MPa 0.75 mm

[0044] 2.309.2 MPa 0.83 mm

[0045] 3.623.9 MPa 1.84 mm

[0046] In the above three cases, the maximum stress of the structure is 623.9 MPa, which is less than the failure stress of 750 MPa for glass fiber composite materials, thus meeting the structural load-bearing requirements.

[0047] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A lightweight composite material load-bearing vehicle frame, characterized in that, include: The base, comprising an outer frame (3) and an inner frame (4), is made of fiberglass composite material; And the support assembly, which includes a pair of support unit one (1) and support unit two (2) set on the base. Multiple sets of support unit one (1) and support unit two (2) are arranged in rows to provide support from both sides of the bottom of the steel coil. The main support structure of support unit one (1) and support unit two (2) is made of basalt fiber composite material.

2. The lightweight composite material load-bearing frame according to claim 1, characterized in that, The support unit (1) includes three sets of A-frame support frames (101) for bearing loads. The adjacent A-frame support frames (101) are spaced 30mm apart and are connected by adhesive glue to the connecting piece (102) and then connected with rivets.

3. The lightweight composite material load-bearing frame according to claim 2, characterized in that, The short side of the A-frame support frame (101) has an angle of 52° with the horizontal plane, a cross-sectional size of 70*100mm, and a wall thickness of 4mm. A 6mm thickened section (103) is provided at a distance of 150mm from the bottom of both sides.

4. The lightweight composite material load-bearing frame according to claim 3, characterized in that, Support unit two (2) includes three sets of A-frame support frames two (201) for bearing load. The adjacent A-frame support frames two (201) are spaced 30mm apart and connected by resin glue to the connecting piece two (202), and then connected with rivets.

5. The lightweight composite material load-bearing frame according to claim 4, characterized in that, The long side of the A-frame support frame 2 (201) has an angle of 38° with the horizontal plane, a cross-sectional size of 70*100mm, and a wall thickness of 4mm. A thickened section 203 with a thickness of 6mm is provided at a distance of 150mm from the bottom of both sides.

6. The lightweight composite material load-bearing frame according to claim 5, characterized in that, The three pairs of A-frame support frame one (101) and the three pairs of A-frame support frame two (201) are all covered with a layer of composite board, and the contact surface with the steel coil is covered with a 12mm heat insulation rubber pad.

7. The lightweight composite material load-bearing frame according to claim 6, characterized in that, A-frame support one (101) and A-frame support two (201) use a density of 2.2 g / cm³. 3 It is made of basalt fiber composite material.

8. The lightweight composite material load-bearing frame according to claim 1, characterized in that, The outer frame (3) uses profiles with a cross-sectional size of 100*100mm and a wall thickness of 5mm; the inner frame (4) uses profiles with a cross-sectional size of 70*70mm and a wall thickness of 5mm; the overall size of the base is 4260*2790mm, and the material has a density of 1.9g / cm³. 3 It is made of glass fiber composite material.

9. The lightweight composite material load-bearing frame according to claim 8, characterized in that, The connection between the outer frame (3) and the inner frame (4) is reinforced by using resin glue to attach the connecting piece three (5) and adding rivets; the connecting piece three (5) is 8mm thick and has an extension length of 50mm.

10. The lightweight composite material load-bearing frame according to claim 1, characterized in that, The base has limit slots and hoisting components on both sides.

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