Anti-fatigue testing device of basalt fiber composite material chassis structure and application of anti-fatigue testing device

Abstract

The invention provides an anti-fatigue testing device for a basalt fiber composite chassis structure and application of the anti-fatigue testing device, and relates to the technical field of lightweight of mine dump trucks. The anti-fatigue testing device for the basalt fiber composite chassis structure comprises a base, and at least four supporting mechanisms are fixedly arranged on the base and used for bearing the chassis structure; each supporting mechanism comprises a vertical lifting assembly, a longitudinal telescopic assembly and a lateral telescopic assembly, the four supporting mechanisms are used for applying alternating loads to the bottom, the longitudinal direction and the side face of the chassis structure so as to test whether the anti-fatigue performance of the chassis structure meets the design requirement or not, and basalt chopped fibers are adopted in the chassis structure so as to improve the overall rigidity; the reinforcing layer is reasonably arranged to improve the rigidity and the impact resistance, and the automatic layering technology is adopted to optimize the fiber direction and the lamination mode to improve the bearing capacity of the chassis; and surface wear-resistant and corrosion-resistant coating treatment is carried out, so that the environmental adaptability is enhanced.

Description

Technical Field

[0001] This application relates to the technical field of lightweight technology for mining dump trucks. Specifically, it relates to an anti-fatigue test device for a basalt fiber composite chassis structure and its application. Background Art

[0002] Mining dump trucks operate under high-intensity working conditions, and the chassis structure bears large impact loads and complex stresses. Traditional chassis usually use high-strength steel, which, although having high load-bearing capacity, is heavy, resulting in increased energy consumption and high operating costs. In addition, steel is vulnerable to corrosion in harsh environments, and its strength and reliability will be reduced after long-term use.

[0003] Basalt fiber composite material is a high-performance lightweight material with high specific strength, high corrosion resistance, excellent anti-fatigue performance, and good processability. The present invention proposes an anti-fatigue test device for a basalt fiber composite chassis structure and its application to reduce the self-weight of mining dump trucks and improve durability and service life. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, in a first aspect, this application proposes an anti-fatigue test device for a basalt fiber composite chassis structure, which includes a base. The base is capable of displacing longitudinally and laterally to expand the bearing distance. At least four support mechanisms are fixedly arranged on the base. The four support mechanisms have the same structural size and are used to bear the chassis structure. The support mechanism includes a vertical lifting component, a longitudinal telescopic component, and a lateral telescopic component. The vertical lifting component, the longitudinal telescopic component, and the lateral telescopic component are all fixedly connected to the upper end surface of the base. Among them, the longitudinal telescopic component and the lateral telescopic component are respectively located on the two outer sides of the vertical lifting component, and the telescopic ends of the longitudinal telescopic component and the lateral telescopic component are respectively slidably sleeved on the telescopic end of the vertical lifting component.

[0005] Preferably, the base includes a bottom longitudinal fixed seat, a bottom longitudinal sliding seat, a first top longitudinal sliding plate, a middle lateral sliding seat, and a second top longitudinal sliding plate. The bottom longitudinal fixed seat and the bottom longitudinal sliding seat are arranged side by side. The first top longitudinal sliding plate is slidably arranged along the length direction of the bottom longitudinal fixed seat. The middle lateral sliding seat is slidably arranged along the width direction of the bottom longitudinal sliding seat. The second top longitudinal sliding plate is slidably arranged along the length direction of the middle lateral sliding seat. The upper end surfaces of the bottom longitudinal fixed seat, the first top longitudinal sliding plate, the middle lateral sliding seat, and the second top longitudinal sliding plate are flush.

[0006] Preferably, the bottom longitudinal fixing seat is arranged in a stepped shape, and a bottom longitudinal sliding groove is arranged along the length direction on the upper end surface of its lower step. A first top longitudinal slider that is slidably adapted to the bottom longitudinal sliding groove is arranged along the length direction on the lower end surface of the first top longitudinal slide plate.

[0007] Preferably, at least two bottom lateral sliding grooves are arranged side by side on the upper end surface of the bottom longitudinal sliding seat. The two bottom lateral sliding grooves are arranged along the width direction of the bottom longitudinal sliding seat. The lower end surfaces of the middle lateral sliding seats are flush and are provided with two middle lateral sliders that are slidably adapted to the bottom lateral sliding grooves.

[0008] Preferably, the upper end surface of the middle lateral sliding seat is arranged in a stepped shape, and a middle longitudinal sliding groove is arranged along the length direction on the upper end surface of its lower step. A second top longitudinal slider that is slidably adapted to the middle longitudinal sliding groove is arranged on the lower end surface of the second top longitudinal slide plate.

[0009] Preferably, the vertical lifting assembly includes a vertical lifting member, a bottom sliding part, a top sliding part, and a fixing assembly. The vertical lifting member is fixedly connected to the base. The bottom sliding part includes a fixing seat and a first sliding member. The fixing seat is fixedly connected to the telescopic end of the vertical lifting member. The first sliding member is fixedly connected to the fixing seat. The top sliding part includes a sliding seat and a second sliding member. The sliding seat is fixedly connected to the displacement end of the first sliding member. The second sliding member is fixedly connected to the sliding seat and is arranged at a right angle to the sliding direction of the first sliding member. The fixing assembly includes a mounting seat, a bracket, and a clamp. The mounting seat is fixedly connected to the displacement end of the second sliding member. One end of the bracket is fixedly connected to the mounting seat. The clamp is fixedly connected to the other end of the bracket.

[0010] Preferably, the longitudinal telescopic assembly includes a longitudinal positioning seat, a third sliding member, a longitudinal telescopic member, and a first slider. The longitudinal positioning seat is fixedly connected to the base. The third sliding member is fixedly connected to the longitudinal positioning seat and is arranged along the width direction of the longitudinal positioning seat. A first fixing plate is fixedly connected to the displacement end of the third sliding member. The longitudinal telescopic member is fixedly connected to the first fixing plate. The first slider is fixedly connected to the telescopic end of the longitudinal telescopic member. The first slider is slidably sleeved on the bracket.

[0011] Preferably, the lateral telescopic assembly includes a lateral fixing seat, a fourth sliding member, a lateral telescopic member, and a second slider. The lateral fixing seat is fixedly connected to the base. The fourth sliding member is fixedly connected to the lateral fixing seat and is arranged along the width direction of the lateral fixing seat. A second fixing plate is fixedly connected to the displacement end of the fourth sliding member. The lateral telescopic member is fixedly connected to the second fixing plate. The second slider is fixedly connected to the telescopic end of the lateral telescopic member. The second slider is slidably sleeved on the bracket.

[0012] On the other hand, the present application further provides an application of a basalt fiber composite chassis structure, including the anti-fatigue test device for the basalt fiber composite chassis structure described above. The chassis structure adopts a frame structure and is composed of components such as main beams, secondary beams, and cross beams to improve the load-bearing capacity. The key stress-bearing parts of the chassis structure adopt a local reinforcement layer design to improve the anti-impact and fatigue life. The basalt chopped fibers and carbon nanotube reinforcement layers are added to the key parts of the chassis structure to improve the overall rigidity.

[0013] Preferably, the chassis structure adopts vacuum infusion, autoclave curing or resin transfer molding processes to ensure uniform infiltration of the material and improve the mechanical properties of the parts. The fiber direction and stacking method are optimized through automated fiber placement technology to improve the load-bearing capacity of the chassis. Surface wear-resistant and anti-corrosion coating treatments are carried out to enhance the environmental adaptability.

[0014] The beneficial effects of the anti-fatigue test device for the basalt fiber composite chassis structure and its application according to the present application are as follows:

[0015] 1. Four support mechanisms are used to apply alternating loads to the bottom, longitudinal, and side surfaces of the chassis structure to test whether the anti-fatigue performance of the chassis structure meets the design requirements.

[0016] 2. The anti-fatigue test of chassis structures with different sizes can be achieved through the displacement of the base itself in the longitudinal and lateral directions.

[0017] 3. Basalt chopped fibers are used in the chassis structure to enhance the overall rigidity. Reasonable arrangement of reinforcement layers is adopted to enhance the stiffness and impact resistance. The fiber direction and stacking method are optimized through automated fiber placement technology to improve the load-bearing capacity of the chassis. Surface wear-resistant and anti-corrosion coating treatments are carried out to enhance the environmental adaptability.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of an anti-fatigue test device for a basalt fiber composite chassis structure according to an embodiment of the present application;

[0021] Figure 2It is an exploded view of the structure of the base of the anti-fatigue test device for the basalt fiber composite chassis structure according to an embodiment of the present application;

[0022] Figure 3 It is an exploded view of the structure of the support mechanism of the anti-fatigue test device for the basalt fiber composite chassis structure according to an embodiment of the present application;

[0023] Figure 4 It is a framework diagram of the material addition sequence and processing method according to an embodiment of the present application.

[0024] Icons: 1. Base; 11. Bottom longitudinal fixing seat; 111. Bottom longitudinal sliding groove; 12. Bottom longitudinal sliding seat; 121. Bottom lateral sliding groove; 13. First top longitudinal sliding plate; 131. First top longitudinal sliding block; 14. Middle lateral sliding seat; 141. Middle lateral sliding block; 142. Middle longitudinal sliding groove; 15. Second top longitudinal sliding plate; 151. Second top longitudinal sliding block; 2. Vertical lifting assembly; 21. Vertical lifting member; 22. Bottom sliding part; 221. Fixing seat; 222. First sliding member; 23. Top sliding part; 231. Sliding seat; 232. Second sliding member; 24. Fixing component; 241. Mounting seat; 242. Bracket; 243. Clamp; 3. Longitudinal telescopic assembly; 31. Longitudinal positioning seat; 32. Third sliding member; 321. First fixing plate; 33. Longitudinal telescopic member; 34. First sliding block; 4. Lateral telescopic assembly; 41. Lateral fixing seat; 42. Fourth sliding member; 421. Second fixing plate; 43. Lateral telescopic member; 44. Second sliding block. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] Example 1, as Figures 1-3As shown in the figure, the anti-fatigue test device for the basalt fiber composite chassis structure according to the embodiment of the present application includes a base 1. The base 1 is capable of longitudinal and lateral displacement to expand the bearing distance. Specifically, the base 1 includes a bottom longitudinal fixed seat 11, a bottom longitudinal sliding seat 12, a first top longitudinal sliding plate 13, a middle lateral sliding seat 14, and a second top longitudinal sliding plate 15. The bottom longitudinal fixed seat 11 and the bottom longitudinal sliding seat 12 are arranged side by side. The first top longitudinal sliding plate 13 is slidably arranged along the length direction of the bottom longitudinal fixed seat 11. The middle lateral sliding seat 14 is slidably arranged along the width direction of the bottom longitudinal sliding seat 12. The second top longitudinal sliding plate 15 is slidably arranged along the length direction of the middle lateral sliding seat 14. The upper end surfaces of the bottom longitudinal fixed seat 11, the first top longitudinal sliding plate 13, the middle lateral sliding seat 14, and the second top longitudinal sliding plate 15 are flush.

[0028] Furthermore, the bottom longitudinal fixed seat 11 is arranged in a stepped shape. The upper end surface of its lower step is provided with a bottom longitudinal sliding groove 111 along the length direction. The lower end surface of the first top longitudinal sliding plate 13 is provided with a first top longitudinal sliding block 131 that is slidably adapted to the bottom longitudinal sliding groove 111.

[0029] Furthermore, at least two bottom lateral sliding grooves 121 are arranged side by side on the upper end surface of the bottom longitudinal sliding seat 12. The two bottom lateral sliding grooves 121 are arranged along the width direction of the bottom longitudinal sliding seat 12. The lower end surfaces of the middle lateral sliding seat 14 are flush and are provided with two middle lateral sliding blocks 141 that are slidably adapted to the bottom lateral sliding grooves 121.

[0030] Furthermore, the upper end surface of the middle lateral sliding seat 14 is arranged in a stepped shape. The upper end surface of its lower step is provided with a middle longitudinal sliding groove 142 along the length direction. The lower end surface of the second top longitudinal sliding plate 15 is provided with a second top longitudinal sliding block 151 that is slidably adapted to the middle longitudinal sliding groove 142.

[0031] It should be noted that in the specific embodiment of the present application, the longitudinal and lateral displacement of the base 1 itself can be realized by the existing technology with the ability of linear displacement to control the longitudinal and lateral displacement strokes of the base 1 itself and adapt to chassis structures of different sizes.

[0032] At least four support mechanisms are fixedly arranged on the base 1. The four support mechanisms have the same structure and size and are used to carry the chassis structure. The support mechanism includes a vertical lifting component 2, a longitudinal telescopic component 3, and a lateral telescopic component 4. The vertical lifting component 2, the longitudinal telescopic component 3, and the lateral telescopic component 4 are all fixedly connected to the upper end surface of the base 1. Among them, the longitudinal telescopic component 3 and the lateral telescopic component 4 are respectively located on the two outer sides of the vertical lifting component 2. The telescopic ends of the longitudinal telescopic component 3 and the lateral telescopic component 4 are respectively slidably sleeved on the telescopic end of the vertical lifting component 2.

[0033] Further, the vertical lifting assembly 2 includes a vertical lifting member 21, a bottom sliding part 22, a top sliding part 23, and a fixing assembly 24. The vertical lifting member 21 is fixedly connected to the base 1. The bottom sliding part 22 includes a fixing seat 221 and a first sliding member 222. The fixing seat 221 is fixedly connected to the telescopic end of the vertical lifting member 21, and the first sliding member 222 is fixedly connected to the fixing seat 221. The top sliding part 23 includes a sliding seat 231 and a second sliding member 232. The sliding seat 231 is fixedly connected to the displacement end of the first sliding member 222, and the second sliding member 232 is fixedly connected to the sliding seat 231 and is arranged at a right angle to the sliding direction of the first sliding member 222, so that the fixing assembly 24 can satisfy the corresponding longitudinal and lateral displacements. The fixing assembly 24 includes a mounting seat 241, a bracket 242, and a clamp 243. The mounting seat 241 is fixedly connected to the displacement end of the second sliding member 232. One end of the bracket 242 is fixedly connected to the mounting seat 241, and the clamp 243 is fixedly connected to the other end of the bracket 242.

[0034] Further, the longitudinal telescopic assembly 3 includes a longitudinal positioning seat 31, a third sliding member 32, a longitudinal telescopic member 33, and a first slider 34. The longitudinal positioning seat 31 is fixedly connected to the base 1. The third sliding member 32 is fixedly connected to the longitudinal positioning seat 31 and is arranged along the width direction of the longitudinal positioning seat 31, so that the longitudinal telescopic member 33 can have a lateral displacement. A first fixing plate 321 is fixedly connected to the displacement end of the third sliding member 32. The longitudinal telescopic member 33 is fixedly connected to the first fixing plate 321. The first slider 34 is fixedly connected to the telescopic end of the longitudinal telescopic member 33, and the first slider 34 is slidably sleeved on the bracket 242.

[0035] Further, the lateral telescopic assembly 4 includes a lateral fixing seat 41, a fourth sliding member 42, a lateral telescopic member 43, and a second slider 44. The lateral fixing seat 41 is fixedly connected to the base 1. The fourth sliding member 42 is fixedly connected to the lateral fixing seat 41 and is arranged along the width direction of the lateral fixing seat 41, so that the lateral telescopic member 43 can satisfy the corresponding longitudinal displacement. A second fixing plate 421 is fixedly connected to the displacement end of the fourth sliding member 42. The lateral telescopic member 43 is fixedly connected to the second fixing plate 421. The second slider 44 is fixedly connected to the telescopic end of the lateral telescopic member 43, and the second slider 44 is slidably sleeved on the bracket 242.

[0036] It can be understood that in actual use, by changing the size of the base 1 itself, the specific positions of the clamps 243 on the four support mechanisms are adjusted to facilitate the fixation of the chassis structure to be measured. The clamps 243 shown in the figure can be used to fix the tires at the corresponding positions on the chassis structure. Of course, if no tires are installed on the chassis structure, the corresponding clamps 243 should be replaced to adapt to the corresponding fixation positions. After the chassis structure is fixed on the support mechanism, the vertical lifting member 21, the longitudinal telescopic member 33, and the lateral telescopic member 43 are controlled to undergo corresponding telescopic changes. For example, when simulating emergency acceleration and emergency braking conditions, a large longitudinal force is applied; when simulating turning conditions, a lateral force is applied. The vertical lifting member 21 can be adaptively adjusted for lifting on the longitudinal or lateral sides relative to the chassis structure to control the angular tilt change of the chassis structure to meet the tilt angle of the chassis in actual situations of the vehicle.

[0037] On the other hand, the embodiments of the present application further provide an application of the basalt fiber composite material chassis structure, including the anti-fatigue test device for the basalt fiber composite material chassis structure described above. The chassis structure adopts a frame structure, which is composed of components such as main beams, secondary beams, and cross beams to improve the load-bearing capacity; the key stress-bearing parts of the chassis structure adopt a local reinforcement layer design to improve the anti-impact and fatigue life; basalt chopped fibers and carbon nanotube reinforcement layers are added to the key parts of the chassis structure to improve the overall rigidity.

[0038] The chassis structure adopts vacuum infusion, autoclave curing, or resin transfer molding processes to ensure uniform infiltration of the material and improve the mechanical properties of the parts; the fiber direction and stacking method are optimized through an automatic layup technology to improve the load-bearing capacity of the chassis; surface wear-resistant and anti-corrosion coating treatments are carried out to enhance the environmental adaptability.

[0039] Specifically, in the specific embodiments of the present application, for the key component structure of the chassis structure, the main beam adopts an "I-shaped" or "box-shaped" cross-sectional structure to improve the bending and torsional resistance capabilities; the secondary beam: adopts a replaceable modular design for easy maintenance and replacement; the suspension bracket and the main beam adopt an integral composite molding process to improve the rigidity; the connection nodes adopt a metal-composite material hybrid connection technology to ensure safety.

[0040] In the structural optimization design of the chassis structure, finite element analysis (FEA) is used to optimize the structural design of the chassis, reasonably arrange the reinforcement layers, and improve the stiffness and impact resistance capabilities; a sandwich structure design is adopted, and honeycomb core materials or foam filling materials are added to the basalt fiber composite material to improve the bending stiffness and impact resistance; a multi-layer stacking structure is adopted at the key stress-bearing parts to improve the local strength and optimize the stress distribution at the connection parts.

[0041] In the material formula design of the chassis structure, basalt fiber cloth or chopped fibers are used as the reinforcement phase, combined with high-performance resin matrices (such as epoxy resin and unsaturated polyester resin), and impact-resistant fillers and wear-resistant additives are added to improve the overall mechanical properties; combined with nano-filling technology to improve the fracture toughness and fatigue resistance of the composite material.

[0042] Among them, the material formula design includes the material addition sequence and treatment method:

[0043] Resin premixing:

[0044] First, mix epoxy resin or unsaturated polyester resin with a curing agent to ensure the uniformity of the resin. Heat the resin system to a certain temperature (usually 40°C - 60°C) to promote the fluidity and wettability of the resin.

[0045] Pretreatment of basalt fiber:

[0046] Treat the basalt fiber to make its surface more easily combined with the resin and enhance the interfacial bonding force. Common surface treatment methods include pickling, surface coating treatment, or treatment with an infiltrant (such as a coupling agent). This step helps reduce the interfacial defects between the resin and the fiber and improve the mechanical properties of the composite material.

[0047] Laminated laying:

[0048] According to the designed chassis structure, use the prepreg laying technology to lay the treated resin and fiber materials in layers according to a certain direction and angle. Different components (such as main beams, secondary beams, etc.) can choose different laying methods according to the stress situation. For example, unidirectional laying is used in the tensile zone, and staggered laying is used in the compression zone.

[0049] Resin curing and molding:

[0050] Use vacuum-assisted resin infusion technology to suck the resin into the mold through vacuum to ensure the uniformity and density of the material. At this time, the temperature and pressure need to be strictly controlled to ensure complete resin curing and the formation of a solid composite material.

[0051] Hot press curing:

[0052] After the resin infusion is completed, further enhance the mechanical properties of the composite material by hot press curing. The temperature is set to 100°C - 130°C, and the curing time is determined according to the requirements of the specific resin system.

[0053] Subsequent steps:

[0054] After the hot press curing is completed, the composite chassis components enter the CNC machining stage to ensure the dimensional accuracy and assembly requirements of each component. This stage requires precise machining to ensure perfect matching of the components during assembly.

[0055] Connection and Assembly:

[0056] Process the connection parts of the chassis components. Since the connection performance of basalt fiber composite materials is different from that of metals, metal-composite hybrid connection technologies (such as riveting, bonding, etc.) need to be adopted. Special strengthening is carried out at the connection nodes to ensure the safety and durability of the structure.

[0057] It should be noted that the specific model specifications of the vertical lifting member 21, the first sliding member 222, the second sliding member 232, the third sliding member 32, the longitudinal telescopic member 33, the fourth sliding member 42, and the lateral telescopic member 43 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0058] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. Anti-fatigue test device for the chassis structure of basalt fiber composite materials, characterized in that Comprising: A base (1), the base (1) being capable of longitudinal and lateral displacement to expand the bearing distance; At least four support mechanisms are fixedly arranged on the base (1), and the four support mechanisms have the same structural size and are used for bearing the chassis structure; The support mechanism includes a vertical lifting component (2), a longitudinal telescopic component (3) and a lateral telescopic component (4). The vertical lifting component (2), the longitudinal telescopic component (3) and the lateral telescopic component (4) are all fixedly connected to the upper end surface of the base (1). Among them, the longitudinal telescopic component (3) and the lateral telescopic component (4) are respectively located on the two outer sides of the vertical lifting component (2) facing outwards, and the telescopic ends of the longitudinal telescopic component (3) and the lateral telescopic component (4) are respectively slidably sleeved on the telescopic end of the vertical lifting component (2).

2. The anti-fatigue test device for the basalt fiber composite chassis structure according to claim 1, characterized in that: The base (1) includes a bottom longitudinal fixed seat (11), a bottom longitudinal sliding seat (12), a first top longitudinal sliding plate (13), a middle lateral sliding seat (14) and a second top longitudinal sliding plate (15). The bottom longitudinal fixed seat (11) and the bottom longitudinal sliding seat (12) are arranged side by side. The first top longitudinal sliding plate (13) is slidably arranged along the length direction of the bottom longitudinal fixed seat (11). The middle lateral sliding seat (14) is slidably arranged along the width direction of the bottom longitudinal sliding seat (12). The second top longitudinal sliding plate (15) is slidably arranged along the length direction of the middle lateral sliding seat (14); The upper end surfaces of the bottom longitudinal fixed seat (11), the first top longitudinal sliding plate (13), the middle lateral sliding seat (14) and the second top longitudinal sliding plate (15) are flush.

3. The anti-fatigue test device for the basalt fiber composite chassis structure according to claim 2, characterized in that: The bottom longitudinal fixed seat (11) is arranged in a stepped shape, and a bottom longitudinal chute (111) is arranged along the length direction on the upper end surface of its lower step. A first top longitudinal slider (131) that is slidably adapted to the bottom longitudinal chute (111) is arranged along the length direction on the lower end surface of the first top longitudinal sliding plate (13).

4. The anti-fatigue test device for the basalt fiber composite chassis structure according to claim 2, characterized in that: At least two bottom lateral chutes (121) are arranged side by side on the upper end surface of the bottom longitudinal sliding seat (12). The two bottom lateral chutes (121) are arranged along the width direction of the bottom longitudinal sliding seat (12). The lower end surfaces of the middle lateral sliding seats (14) are flush and are provided with two middle lateral sliders (141) that are slidably adapted to the bottom lateral chutes (121).

5. The anti-fatigue test device for the basalt fiber composite chassis structure according to claim 2, characterized in that: The upper end surface of the middle lateral sliding seat (14) is arranged in a stepped shape, and a middle longitudinal chute (142) is arranged along the length direction on the upper end surface of its lower step. A second top longitudinal slider (151) that is slidably adapted to the middle longitudinal chute (142) is arranged on the lower end surface of the second top longitudinal sliding plate (15).

6. The anti-fatigue test device for the basalt fiber composite chassis structure according to claim 1, characterized in that: The vertical lifting assembly (2) includes a vertical lifting member (21), a bottom sliding portion (22), a top sliding portion (23), and a fixing assembly (24). The vertical lifting member (21) is fixedly connected to the base (1). The bottom sliding portion (22) includes a fixing base (221) and a first sliding member (222). The fixing base (221) is fixedly connected to the telescopic end of the vertical lifting member (21), and the first sliding member (222) is fixedly connected to the fixing base (221). The top sliding portion (23) includes a sliding base (231) and a second sliding member (232). The sliding base (231) is fixedly connected to the displacement end of the first sliding member (222), and the second sliding member (232) is fixedly connected to the sliding base (231) and is arranged at a right angle to the sliding direction of the first sliding member (222). The fixing assembly (24) includes a mounting base (241), a bracket (242), and a fixture (243). The mounting base (241) is fixedly connected to the displacement end of the second sliding member (232), one end of the bracket (242) is fixedly connected to the mounting base (241), and the fixture (243) is fixedly connected to the other end of the bracket (242).

7. The anti-fatigue test device for the basalt fiber composite chassis structure according to claim 6, characterized in that: The longitudinal telescopic assembly (3) includes a longitudinal positioning base (31), a third sliding member (32), a longitudinal telescopic member (33), and a first slider (34). The longitudinal positioning base (31) is fixedly connected to the base (1). The third sliding member (32) is fixedly connected to the longitudinal positioning base (31) and is arranged along the width direction of the longitudinal positioning base (31). A first fixing plate (321) is fixedly connected to the displacement end of the third sliding member (32). The longitudinal telescopic member (33) is fixedly connected to the first fixing plate (321). The first slider (34) is fixedly connected to the telescopic end of the longitudinal telescopic member (33), and the first slider (34) is slidably sleeved on the bracket (242).

8. The anti-fatigue test device for the basalt fiber composite chassis structure according to claim 6, characterized in that: The lateral telescopic assembly (4) includes a lateral fixing base (41), a fourth sliding member (42), a lateral telescopic member (43), and a second slider (44). The lateral fixing base (41) is fixedly connected to the base (1). The fourth sliding member (42) is fixedly connected to the lateral fixing base (41) and is arranged along the width direction of the lateral fixing base (41). A second fixing plate (421) is fixedly connected to the displacement end of the fourth sliding member (42). The lateral telescopic member (43) is fixedly connected to the second fixing plate (421). The second slider (44) is fixedly connected to the telescopic end of the lateral telescopic member (43), and the second slider (44) is slidably sleeved on the bracket (242).

9. Application of a basalt fiber composite chassis structure, characterized in that, An anti-fatigue test device for a basalt fiber composite material chassis structure according to any one of claims 1-8. The chassis structure adopts a frame structure and is composed of components such as main beams, secondary beams, and cross beams to improve the load-bearing capacity; The key stress-bearing parts of the chassis structure adopt a local reinforcement layer design to improve the anti-impact and fatigue life; Basalt chopped fibers and carbon nanotube reinforcement layers are added to the key parts of the chassis structure to improve the overall rigidity.

10. The application of the basalt fiber composite chassis structure according to claim 9, characterized in that, The chassis structure adopts vacuum infusion, autoclave curing or resin transfer molding processes to ensure uniform infiltration of materials and improve the mechanical properties of the parts; optimizes the fiber direction and lamination method through automated fiber placement technology to improve the load-bearing capacity of the chassis; and performs surface wear-resistant and anti-corrosion coating treatments to enhance environmental adaptability.

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