Battery frame connecting structure of side battery replacement mine truck

Abstract

The utility model belongs to the technical field of new energy mining dump trucks, and particularly relates to a battery frame connecting structure of a side battery changing mining truck, which aims at solving the problem that the existing battery frame connecting structure of the side battery changing mining truck is difficult to consider both the connecting rigidity and the buffering performance, and adopts the following scheme that the battery frame connecting structure comprises a frame assembly and a battery bracket assembly, a transverse connecting part and a longitudinal connecting part are arranged between the battery bracket assembly and the frame assembly, composite elastic core bodies are arranged between the connecting parts, an anti-falling outer pipe is rotationally connected to the side, facing the battery pack, of the battery bracket assembly, and an anti-falling abutting rod with an inclined face at the front end is elastically connected into the anti-falling outer pipe; when the inclined surface faces upwards, the anti-falling abutting rod is clamped into the anti-falling groove to achieve fixation, and when the inclined surface faces downwards, the anti-falling abutting rod is separated to achieve disassembly. According to the utility model, the connection rigidity and the buffer performance are improved through the longitudinal and transverse multi-point elastic connection structure, and the quick locking and unlocking of the battery pack are realized through the rotatable anti-falling mechanism.

Description

A battery frame connection structure for side-switch mining trucks Technical Field

[0001] This utility model relates to a connection structure, specifically a battery frame connection structure for a side-switch mining truck, belonging to the technical field of new energy mining dump trucks. Background Technology

[0002] With the continuous expansion of new energy technology applications in the mining dump truck field, side-swapping mode has become an important development direction for mining machinery due to its small footprint and efficient and convenient energy replenishment. Currently, various technical solutions related to battery frame connection structures have emerged in the industry. Traditional side-swapping frames lack effective airflow guidance design, causing turbulent flow of hot air exhausted from the cooling unit within the frame, which easily flows back to the air inlet, resulting in "hot air circulation" and low heat exchange efficiency. There is a conflict between structural strength and ventilation; large openings created to improve heat dissipation severely weaken the torsional stiffness of the mining truck frame, easily leading to stress concentration and cracks at the opening edges under harsh mining conditions. Environmental adaptability is poor; open or simple opening designs cannot effectively block high dust, rainwater, and high-pressure washing water in mining areas, easily leading to contamination and short circuits of electrical components. There is also a risk of collision during battery swapping; protruding fasteners (such as bolt heads) on the outer surface of the side-swapping frame are prone to rigid collisions or scrapes with the battery swapping trailer during battery pack grabbing and sliding installation, leading to component damage or battery swapping failure.

[0003] In existing technologies, such as the new energy mining truck side battery swapping frame disclosed in CN119283603A, a combination structure of outer frame and bracket is adopted, and battery swapping connection seats and guide columns are set on the left and right sides of the skin. The battery swapping guidance function is achieved through the cooperation of limit rod, adjusting pad, limit plate and needle roller. Another example is the pure electric off-highway rigid mining truck battery box installation structure and usage method disclosed in CN117621794A, which adopts a combination structure of box bracket, through beam, bracket support and wire rope shock absorber. The vibration impact in three directions is absorbed through hinged connection and wire rope shock absorber. However, the above-mentioned existing technologies still have the following technical defects: First, it is difficult to balance connection rigidity and buffering performance. Existing structures either adopt rigid connection methods with a single bolt or connecting plate, which are prone to fatigue deformation and bolt loosening and breakage under the frequent vibration and heavy impact conditions of mining trucks, or adopt flexible connections such as wire rope shock absorbers, although they can absorb vibration impact in three directions. First, insufficient vibration absorption but inadequate connection rigidity leads to excessive relative displacement between the battery frame and the vehicle frame, affecting driving safety. Second, limited torsional deformation protection: existing brackets and frames mostly use rigid connections or single-point hinges. When mining trucks travel on uneven roads, the torsional deformation generated by the vehicle frame is directly transmitted to the battery bracket or can only absorb vibrations in some directions, easily causing bracket deformation and battery pack compression damage. Furthermore, the lack of an effective coordinated connection structure between the left and right battery brackets leads to asynchronous deformation, further aggravating the risk of battery pack damage. Third, the design of the battery pack locking and disassembly mechanism is not perfect. The existing guide pillar and limit rod structure mainly serve a guiding function but lack reliable anti-detachment locking function. Under severe bumpy conditions, there is a risk of accidental battery pack detachment. Moreover, the battery swapping operation requires multiple steps of alignment and locking, affecting work efficiency. Therefore, how to improve connection rigidity and buffering performance while achieving torsional deformation isolation, reliable battery pack locking, and convenient disassembly and assembly has become an urgent technical problem to be solved in this field. Summary of the Invention

[0004] This utility model provides a battery frame connection structure for side-switch mining vehicles to solve the problem that existing side-switch battery frame connection structures are difficult to balance between connection rigidity and buffer performance.

[0005] The present invention achieves the above objectives through the following technical solution: a battery frame connection structure for a side-swappable mining vehicle, including a frame assembly, battery bracket assemblies on both sides of the frame assembly, and a battery pack placed on the battery bracket assemblies;

[0006] The battery bracket assembly and the vehicle frame assembly are provided with a transverse connection part and a longitudinal connection part, and a composite elastic core is provided between the connection parts of the battery bracket assembly and the vehicle frame assembly. The composite elastic core includes elastic gaskets and metal gaskets that are arranged in multiple layers of staggered lamination. When the vehicle frame assembly vibrates vertically or laterally, the composite elastic core of the connection part is in an elastically compressed state.

[0007] The battery bracket assembly is rotatably connected to an anti-detachment outer tube on the side facing the battery pack. An anti-detachment rod is elastically connected inside the anti-detachment outer tube. An anti-detachment groove is provided on the side wall of the battery pack. The front end of the anti-detachment rod is limited and locked in the anti-detachment groove. The front end of the anti-detachment rod is provided with a slope. When the slope is set upward, the front end of the anti-detachment rod is locked in the anti-detachment groove to fix the battery pack. When the slope is set downward, the front end of the anti-detachment rod disengages from the anti-detachment groove to disassemble the battery pack.

[0008] As a further embodiment of this utility model: the frame assembly includes a subframe and a main frame. A connecting angle steel is welded to the outer wall of the subframe, and a connecting ear is welded to the outer wall of the main frame. The battery bracket assembly includes an L-shaped middle support plate and an L-shaped side support plate. A longitudinal fixing plate is connected to the top of the L-shaped middle support plate and the L-shaped side support plate. A transverse fixing plate is connected to the body of the L-shaped middle support plate and the L-shaped side support plate. The longitudinal fixing plate and the transverse fixing plate are arranged perpendicular to each other. The longitudinal fixing plate is aligned with the connecting angle steel, and the transverse fixing plate is aligned with the connecting ear. A composite elastic core is sandwiched between the longitudinal fixing plate and the connecting angle steel and between the transverse fixing plate and the connecting ear. Locking bolts are connected through the longitudinal fixing plate and the connecting angle steel and between the transverse fixing plate and the connecting ear.

[0009] As a further embodiment of this utility model: L-shaped side support plates are symmetrically arranged on both sides of the L-shaped middle support plate, and cross bracing beams are connected between the corresponding support plates on both sides of the frame assembly. Each support plate of the battery bracket assembly has a Z-shaped connecting plate welded and fixed on the side facing the frame assembly. Both ends of the cross bracing beam are welded and fixed with butt plates. The butt plates and the Z-shaped connecting plates are fixedly connected by bolts, and the Z-shaped connecting plates are bolted to the cross bracing beams.

[0010] As a further improvement of this utility model: each plate of the battery bracket assembly is also welded and fixed with a limiting plate and multiple channel steels on the side facing the frame assembly. The limiting plate is welded above the channel steels and fits against the lower wing surface of the main frame.

[0011] As a further embodiment of this utility model: a side baffle is vertically welded to the outer edge of the vertical plate of the L-shaped side support plate, and multiple connecting struts are welded and fixed between the outer edge of the horizontal plate of the L-shaped side support plate and the side baffle. Several rotating rollers are embedded in the inner side of the connecting struts, and the rotating rollers are in contact with the side wall of the battery pack.

[0012] As a further embodiment of this utility model: the bottom end of the connecting support rod located in the middle part is connected to the anti-detachment outer tube. The anti-detachment outer tube has an anti-detachment abutment cavity for movably inserting the anti-detachment abutment rod. The inner side wall of the anti-detachment abutment cavity has a limiting groove. The outer side wall of the anti-detachment abutment rod has a limiting slider fixed thereon, and the limiting slider is slidably embedded in the limiting groove. A first compression spring is also provided in the anti-detachment abutment cavity. One end of the first compression spring abuts against the rear end of the anti-detachment abutment rod, and the other end of the first compression spring abuts against the bottom of the anti-detachment abutment cavity.

[0013] As a further improvement of this utility model: the tube body of the anti-detachment outer tube is also provided with an annular inner groove, and a second compression spring and a retaining ring are provided in the annular inner groove. One end of the second compression spring abuts against the bottom of the annular inner groove, and the other end of the second compression spring abuts against the retaining ring. The outer wall of the anti-detachment outer tube is also provided with a positioning slot. The connecting support rod is used to pass through the inner wall of the cavity of the anti-detachment outer tube and is fixedly connected with a positioning block. When the anti-detachment support rod rotates to the position of inclined surface upward or downward, the positioning block is limited and locked in the positioning slot, and the positioning block is attached to one side of the retaining ring.

[0014] As a further embodiment of this utility model: the number of laminated layers of the elastic pad and the metal pad of the composite elastic core is 3-8 layers, and the outermost sides of both sides of the composite elastic core are elastic pads. The elastic pads are made of rubber material, the metal pads are made of stainless steel material, and the surface of the metal pads is provided with anti-slip texture.

[0015] As a further improvement of this utility model: the subframe is made of thick-walled high-strength steel welded together, the main frame is a flexible frame structure, and the battery bracket assemblies on both sides form an integral connection structure through cross bracing beams, and the cross bracing beams are steel rectangular tube structures.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model is provided with a frame assembly and a battery bracket assembly. The battery bracket assembly holds a battery pack. The battery bracket assembly adopts a double-sided arrangement structure, which enables the mining vehicle to make full use of the space on both sides of the vehicle to carry a large-capacity battery pack, meeting the mining operation's requirements for long range and high power.

[0018] 2. The battery bracket assembly and the vehicle frame assembly of this utility model are provided with a transverse connection and a longitudinal connection. A composite elastic core is provided between each connection point of the battery bracket assembly and the vehicle frame assembly. The composite elastic core includes multiple layers of interleaved elastic pads and metal pads. When the vehicle frame assembly vibrates vertically or laterally, the composite elastic core at the connection point is elastically compressed. The transverse and longitudinal connections create a three-dimensional fixed structure between the battery bracket assembly and the vehicle frame assembly. The composite elastic core combines the energy absorption characteristics of elastic materials with the rigid support characteristics of metal materials. When the vehicle frame assembly vibrates vertically, the composite elastic core is compressed, the elastic pads undergo elastic deformation to absorb vibration energy, and the metal pads… The pads serve to evenly distribute pressure and limit excessive deformation. When the frame assembly experiences lateral vibration, the composite elastic core undergoes shear deformation, absorbing energy through the shear elastic deformation of the elastic pads, thus effectively isolating the frame vibration from the battery tray assembly. Furthermore, because the composite elastic core is elastically compressed at the connection point, it always maintains a certain preload, ensuring that no gaps are generated at the connection point when subjected to impact loads, avoiding the problem of increased impact and loose bolts caused by gaps. This elastic connection method also allows for a small relative displacement between the battery tray assembly and the frame assembly, so that the torsional deformation generated by the frame is not completely rigidly transmitted to the battery tray assembly, thereby protecting the battery pack from damage caused by excessive deformation forces.

[0019] 3. The battery bracket assembly of this utility model is rotatably connected to an anti-detachment outer tube on the side facing the battery pack. An anti-detachment rod is elastically connected inside the anti-detachment outer tube. An anti-detachment groove is provided on the side wall of the battery pack. The front end of the anti-detachment rod is limited and locked in the anti-detachment groove. The front end of the anti-detachment rod is provided with an inclined surface. When the inclined surface is set upward, the front end of the anti-detachment rod is locked in the anti-detachment groove to fix the battery pack. When the inclined surface is set downward, the front end of the anti-detachment rod disengages from the anti-detachment groove to disassemble the battery pack. Through the rotation of the anti-detachment outer tube and the elastic extension and retraction of the anti-detachment rod, the battery pack can be quickly locked and unlocked, greatly improving the efficiency of battery swapping operations. The operator only needs to rotate the anti-detachment outer tube to change the orientation of the inclined surface of the front end of the anti-detachment rod, thereby achieving... Switching between locked and unlocked states: When the slope is facing upwards, the anti-detachment rod's front end engages with the anti-detachment groove under the action of elastic force. Due to the direction of the slope, the anti-detachment rod generates a self-locking effect when subjected to outward pulling force. That is, when the battery pack attempts to detach during vibration, the edge of the anti-detachment groove will further press the slope of the anti-detachment rod, making it more firmly locked in the groove, thus achieving the anti-detachment function and effectively preventing the risk of the battery pack accidentally falling off under severe bumps and impacts of the mining vehicle. When the slope is facing downwards, the direction of the front slope of the anti-detachment rod changes, making it easier for the anti-detachment rod to slide out of the anti-detachment groove when subjected to outward pulling force. At the same time, the operator can easily push the battery pack to compress the anti-detachment rod back into the anti-detachment outer tube, achieving quick disassembly. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall assembly of this utility model;

[0021] Figure 2 is a three-dimensional structural diagram of the frame assembly of this utility model;

[0022] Figure 3 is a schematic diagram of the overall structure of the battery bracket assembly of this utility model;

[0023] Figure 4 is a schematic diagram of the connection structure between the L-shaped side support plate and the cross brace beam of this utility model.

[0024] Figure 5 is a schematic diagram of the disassembled structure of the lateral connection part between the battery bracket assembly and the vehicle frame assembly of this utility model;

[0025] Figure 6 is a schematic diagram of the disassembled structure of the longitudinal connection part between the battery bracket assembly and the vehicle frame assembly of this utility model;

[0026] Figure 7 is a schematic diagram of the battery pack structure of this utility model;

[0027] Figure 8 is a schematic diagram of the L-shaped side support plate structure of this utility model;

[0028] Figure 9 is a schematic diagram of the structure of this utility model and point A in 8;

[0029] Figure 10 is a cross-sectional structural diagram of the connection between the anti-detachment outer tube and the anti-detachment rod of this utility model;

[0030] Figure 11 is a cross-sectional structural diagram of the connection between the anti-detachment outer tube and the connecting support rod of this utility model.

[0031] In the diagram: 1. Frame assembly; 11. Subframe; 12. Main frame; 13. Connecting angle steel; 14. Connecting lug; 2. Battery bracket assembly; 21. L-shaped center support plate; 22. L-shaped side support plate; 23. Cross brace beam; 24. Side baffle; 25. Connecting strut; 26. Longitudinal fixing plate; 27. Transverse fixing plate; 28. Limiting plate; 29. ​​Channel steel; 210. Z-shaped connecting plate; 211. Butt joint 212. Plate; 3. Roller; 4. Battery pack; 5. Anti-detachment groove; 6. Elastic gasket; 7. Metal gasket; 8. Locking bolt; 9. Anti-detachment outer tube; 10. Anti-detachment stop rod; 11. Stop rod movable cavity; 12. Limiting slide groove; 13. Stop rod limiting slider; 14. First compression spring; 15. Annular inner groove; 16. Second compression spring; 17. Retaining ring; 18. Positioning slot; 19. Positioning block. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] As shown in Figures 1 to 11, a battery frame connection structure for a side-swappable mining vehicle includes a frame assembly 1, battery bracket assemblies 2 on both sides of the frame assembly 1, and a battery pack 3 placed on the battery bracket assembly 2. The battery bracket assembly 2 adopts a double-sided arrangement structure, which enables the mining vehicle to make full use of the space on both sides of the vehicle to carry a large-capacity battery pack, thus meeting the mining operation's requirements for long range and high power.

[0035] The battery bracket assembly 2 and the vehicle frame assembly 1 are provided with lateral and longitudinal connection parts, and a composite elastic core is provided between each connection part of the battery bracket assembly 2 and the vehicle frame assembly 1. The composite elastic core includes elastic gaskets 4 and metal gaskets 5, which are arranged in multiple layers of staggered lamination. When the vehicle frame assembly 1 vibrates vertically or laterally, the composite elastic core at the connection part is elastically compressed. The lateral and longitudinal connections form a three-dimensional fixed structure between the battery bracket assembly 2 and the vehicle frame assembly 1. The composite elastic core combines the energy absorption characteristics of elastic materials with the rigid support characteristics of metal materials. When the vehicle frame assembly 1 vibrates vertically, the composite elastic core is compressed, the elastic gaskets 4 undergo elastic deformation to absorb vibration energy, and the metal gaskets 5... It plays a role in evenly distributing pressure and limiting excessive deformation. When the frame assembly 1 vibrates laterally, the composite elastic core undergoes shear deformation. Similarly, the energy is absorbed by the shear elastic deformation of the elastic pad 4, thus effectively isolating the frame vibration from being transmitted to the battery bracket assembly 2. Furthermore, since the composite elastic core is in an elastically compressed state at the connection point, it always maintains a certain pre-pressure, ensuring that no gaps are generated at the connection point when subjected to impact loads, thus avoiding the problem of increased impact and loose bolts caused by gaps. This elastic connection method also allows for a small relative displacement between the battery bracket assembly 2 and the frame assembly 1, so that the torsional deformation generated by the frame is not completely rigidly transmitted to the battery bracket assembly 2, thereby protecting the battery pack 3 from damage by excessive deformation forces.

[0036] The battery bracket assembly 2 is rotatably connected to an anti-detachment outer tube 7 on the side facing the battery pack 3. An anti-detachment rod 71 is elastically connected inside the anti-detachment outer tube 7. An anti-detachment groove 31 is provided on the side wall of the battery pack 3. The front end of the anti-detachment rod 71 is limited and locked in the anti-detachment groove 31. The front end of the anti-detachment rod 71 is provided with an inclined surface. When the inclined surface is set upward, the front end of the anti-detachment rod 71 is locked in the anti-detachment groove 31 to fix the battery pack 3. When the inclined surface is set downward, the front end of the anti-detachment rod 71 is disengaged from the anti-detachment groove 31 to disassemble the battery pack 3. By rotating the anti-detachment outer tube 7 and elastically extending and retracting the anti-detachment rod 71, the battery pack 3 can be quickly locked and unlocked, which greatly improves the efficiency of battery swapping operations. The operator only needs to rotate the anti-detachment outer tube 7 to change the orientation of the inclined surface of the front end of the anti-detachment rod 71, thereby achieving... Switching between locked and unlocked states: When the slope is set upwards, the anti-detachment rod 71, under the action of elastic force, engages with the anti-detachment groove 31 at its front end. Due to the direction of the slope, the anti-detachment rod 71 generates a self-locking effect when subjected to outward pulling force. That is, when the battery pack 3 attempts to detach during vibration, the edge of the anti-detachment groove 31 will further press the slope of the anti-detachment rod 71, making it more firmly locked in the groove, thereby achieving the anti-detachment function and effectively preventing the risk of the battery pack 3 accidentally falling off under severe bumps and impacts of the mining vehicle. When the slope is set downwards, the direction of the slope of the front end of the anti-detachment rod 71 changes, making it easier for the anti-detachment rod 71 to slide out of the anti-detachment groove 31 when subjected to outward pulling force. At the same time, the operator can easily push the battery pack 3 to compress the anti-detachment rod 71 back into the anti-detachment outer tube 7, achieving quick disassembly.

[0037] Example 2

[0038] Improvements based on Example 1:

[0039] As shown in Figures 1 to 3, the frame assembly 1 includes a subframe 11 and a main frame 12. Connecting angle steel 13 is welded to the outer wall of the subframe 11, and connecting lugs 14 are welded to the outer wall of the main frame 12. The battery bracket assembly 2 includes an L-shaped intermediate support plate 21 and an L-shaped side support plate 22. A longitudinal fixing plate 26 is connected to the top of the L-shaped intermediate support plate 21 and the L-shaped side support plate 22, and a transverse fixing plate 27 is connected to the body of the L-shaped intermediate support plate 21 and the L-shaped side support plate 22. The longitudinal fixing plate 26 and the transverse fixing plate 27... The subframes are arranged perpendicularly to each other. The longitudinal fixing plate 26 is aligned and connected to the connecting angle steel 13, and the transverse fixing plate 27 is aligned and connected to the connecting lug 14. A composite elastic core is sandwiched between the longitudinal fixing plate 26 and the connecting angle steel 13, and between the transverse fixing plate 27 and the connecting lug 14. Locking bolts 6 are also connected through the longitudinal fixing plate 26 and the connecting angle steel 13, and between the transverse fixing plate 27 and the connecting lug 14. Through the double-layer frame structure of the subframe 11 and the main frame 12, the load is reasonably distributed. The frame 11 uses welded connecting angle steel 13 to bear the longitudinal load from the battery bracket assembly 2, while the main frame 12 bears the lateral load through welded connecting ears 14. This allows the forces in different directions to be borne by different parts of the frame, avoiding stress concentration. The L-shaped structure design of the L-shaped middle support plate 21 and the L-shaped side support plate 22 gives the battery bracket assembly 2 good spatial rigidity. The longitudinal fixing plate 26 at the top is used to form a longitudinal connection with the connecting angle steel 13 on the subframe 11, and the lateral fixing plate 27 on the plate body is used to form a lateral connection with the connecting ears 14 on the main frame 12. The bidirectional fixing method with the longitudinal and lateral sides perpendicular to each other constrains the battery bracket assembly 2 in both longitudinal and lateral directions, effectively resisting the longitudinal impact generated by vehicle acceleration and deceleration and the lateral impact generated by steering. Composite elastic cores are sandwiched between the longitudinal fixing plate 26 and the connecting angle steel 13, and between the lateral fixing plate 27 and the connecting ears 14, realizing elastic buffering at the connection points and avoiding the impact transmission and stress concentration problems caused by rigid connections.

[0040] As shown in Figures 1, 2, 4 to 9, L-shaped side support plates 22 are symmetrically arranged on both sides of the L-shaped middle support plate 21. Cross bracing beams 23 connect the corresponding support plates on both sides of the frame assembly 1. Each support plate of the battery bracket assembly 2 has a U-shaped connecting plate 210 welded and fixed to the side facing the frame assembly 1. Both ends of the cross bracing beam 23 have welding plates 211 welded and fixed. The welding plates 211 and the U-shaped connecting plates 210 are fixedly connected by bolts, and the U-shaped connecting plates 210 are bolted to the cross bracing beam 23. The cross bracing beam 23 connects the corresponding support plates on both sides of the frame assembly 1, connecting the left and right battery bracket assemblies 2 into an integral frame structure, enhancing structural stability. The U-shaped connecting plates 210 can evenly distribute the force transmitted from the cross bracing beam 23 to the entire support plate. When it is necessary to replace the battery bracket assembly 2 on one side, the cross bracing beam 23 can be separated simply by removing the bolts on the welding plates 211, without the need for complete disassembly. The integral frame connection structure significantly improves the structural rigidity of the battery bracket assembly 2.

[0041] Furthermore, each plate of the battery bracket assembly 2 is welded and fixed with a limiting plate 28 and multiple channel steels 29 on the side facing the frame assembly 1. The limiting plate 28 is welded above the channel steels 29 and fits against the lower wing surface of the main frame 12. The multiple channel steels 29 enhance the longitudinal stiffness of the plate facing the frame assembly 1. The limiting plate 28 is welded to limit the upward movement of the battery bracket assembly 2. When the vehicle is driving on a severely bumpy road, the battery bracket assembly 2 is subjected to an upward impact force. The limiting plate 28 will contact the lower wing surface of the main frame 12 and directly transfer the impact force to the main frame 12, avoiding excessive tensile load on the connecting bolts and ensuring the stable fixation of the battery pack 3 under various working conditions.

[0042] Furthermore, a side baffle 24 is vertically welded to the outer edge of the vertical body of the L-shaped side support plate 22. Multiple connecting struts 25 are welded and fixed between the outer edge of the horizontal body of the L-shaped side support plate 22 and the side baffle 24. Several rotating rollers 212 are embedded in the inner side of the connecting struts 25, and the rotating rollers 212 are in contact with the side wall of the battery pack 3. The side baffle 24 forms lateral protection for the battery pack 3, effectively preventing the battery pack 3 from lateral displacement due to lateral vibration during vehicle operation. At the same time, the side baffle 24 can also play a role in anti-collision. During the battery swapping operation, the rolling characteristics of the rotating rollers 212 make the pushing and pulling of the battery pack 3 smoother and less labor-intensive, greatly improving the battery swapping efficiency. Moreover, the arrangement of multiple connecting struts 25 makes the rotating rollers 212 distributed at multiple points along the height direction of the battery pack 3, ensuring the uniformity of lateral support.

[0043] As shown in Figures 8 to 11, the bottom end of the connecting strut 25 located in the middle is connected to the anti-detachment outer tube 7. The anti-detachment outer tube 7 has an internal cavity 72 for movably inserting the anti-detachment rod 71. A limiting groove 73 is formed on the inner wall of the cavity 72, and a limiting slider 74 is fixed to the outer wall of the anti-detachment rod 71. The limiting slider 74 is slidably embedded in the limiting groove 73. A first compression spring 75 is also provided inside the cavity 72. One end of the first compression spring 75 abuts against the rear end of the anti-detachment rod 71, and the other end abuts against the bottom of the cavity 72. The cavity 72 inside the anti-detachment outer tube 7 provides movement space for the anti-detachment rod 71. The cooperation between the anti-detachment rod and the limiting slider 74 serves as a guide and limiter, ensuring that the anti-detachment rod 71 maintains the correct direction and position during extension and retraction, preventing rotation or tilting, and ensuring the accuracy of the orientation of the inclined surface at the front end of the anti-detachment rod 71. The sliding of the limiting slider 74 within the limiting groove 73 also limits the maximum extension and maximum compression of the anti-detachment rod 71, preventing excessive extension and retraction from damaging the first compression spring 75 or causing the anti-detachment rod 71 to fall off. The first compression spring 75 provides elastic force to maintain the extended state of the anti-detachment rod 71, ensuring that the anti-detachment rod 71 remains in the extended state when no external force is applied. When the battery pack 3 is pushed in, the anti-detachment rod 71 is compressed and automatically springs into the anti-detachment groove 31, achieving automatic locking.

[0044] Furthermore, the anti-detachment outer tube 7 also has an annular inner groove 76, in which a second compression spring 77 and a retaining ring 78 are installed. One end of the second compression spring 77 abuts against the bottom of the annular inner groove 76, and the other end abuts against the retaining ring 78. The outer wall of the anti-detachment outer tube 7 also has a positioning slot 79. The connecting support rod 25 is used to pass through the inner wall of the cavity of the anti-detachment outer tube 7 and is fixedly connected to a positioning block 710. When the anti-detachment support rod 71 rotates to the inclined upward or downward position, the positioning block 710 is limited and locked in the positioning slot 79, and the positioning block 710 is placed against one side of the retaining ring 78. Through the cooperation of the annular inner groove 76, the second compression spring 77 and the retaining ring 78, the anti-detachment outer tube 7 is fixed relative to the connecting support rod 76. With the axial elastic positioning of the support rod 25, when it is necessary to rotate the anti-detachment outer tube 7 to switch the locking state, the operator needs to first axially compress the anti-detachment outer tube 7 to disengage the positioning block 710 from the positioning slot 79, and then rotate the anti-detachment outer tube 7 to the target position. After releasing, the second compression spring 77 pushes the anti-detachment outer tube 7 to reset, so that the positioning block 710 re-engages into the positioning slot 79. The position of the positioning slot 79 corresponds to the orientation of the inclined surface at the front end of the anti-detachment rod 71. When the positioning block 710 is engaged in the positioning slot 79, the inclined surface of the anti-detachment rod 71 is exactly in the correct upward or downward position, avoiding the risk of the anti-detachment outer tube 7 accidentally rotating and changing the locking state due to vibration. Even under severe vibration conditions, the state will not change, ensuring the safety of the battery pack 3.

[0045] As shown in Figures 1, 2, 5, and 6, the composite elastic core has 3-8 layers of elastic pads 4 and metal pads 5 laminated together. Both outermost sides of the composite elastic core are made of elastic pads 4. The elastic pads 4 are made of rubber, and the metal pads 5 are made of stainless steel. The surface of the metal pads 5 is provided with anti-slip texture. The 3-8 layers of elastic pads 4 and metal pads 5 ensure that the composite elastic core has sufficient elastic deformation capacity to absorb vibration energy, and also ensure the structural stability of the core, adapting to the harsh environment of dusty and humid mines, and ensuring the long service life of the composite elastic core.

[0046] Furthermore, the subframe 11 is welded from thick-walled high-strength steel, while the main frame 12 is a flexible frame structure. The battery bracket assemblies 2 on both sides form an integral connection structure through cross bracing beams 23, which are steel rectangular tube structures. This allows the subframe 11 to have high load-bearing capacity and impact resistance, effectively bearing the full-load static and dynamic loads from the cargo box, preventing impact forces from directly acting on the main frame 12, and protecting the main frame 12 from damage caused by excessive loads. The main frame 12 has a certain elastic deformation capacity, enabling it to adapt to torsional deformation caused by uneven ground when driving on rough mining roads, avoiding fatigue cracking of the frame due to excessive rigidity. When the vehicle travels on tortuous roads, the torsional deformation of the frame is redistributed between the left and right sides through the cross bracing beams 23, allowing the brackets on both sides to deform collaboratively, preventing one side of the bracket from being deformed and damaged due to excessive torque. The cross-sectional shape of the cross bracing beams 23 has torsional resistance, providing greater rigidity with less weight, ensuring connection strength, and improving the overall structural rigidity of the battery bracket assembly 2.

[0047] Working principle: When installing battery pack 3, the operator first places battery pack 3 on the battery bracket assembly 2 on both sides of the frame assembly 1. The bottom of battery pack 3 contacts the horizontal plate of L-shaped middle support plate (1) and L-shaped side support plate 22. At the same time, the side wall of battery pack 3 is in contact with the rotating roller 212 embedded in the inner side of the connecting support rod 25. The rotating roller 212 rotates freely during the process of pushing battery pack 3 in, converting sliding friction into rolling friction, making the pushing operation smoother and less strenuous.

[0048] When the battery pack 3 is pushed into the predetermined position, the anti-detachment rod 71 inside the anti-detachment outer tube 7 at the bottom of the support rod 25 in the middle part automatically engages with the anti-detachment groove 31 on the side wall of the battery pack 3 under the elastic force of the first compression spring 75. At this time, the inclined surface of the front end of the anti-detachment rod 71 is set upward, forming a self-locking effect. That is, when the battery pack 3 is subjected to outward pulling force, the edge of the anti-detachment groove 31 will further press the inclined surface of the anti-detachment rod 71, making it more firmly locked in the groove, thus achieving reliable fixation of the battery pack 3.

[0049] During vehicle operation, when the mining truck travels on the uneven road surface of the mine, the subframe 11 and main frame 12 of the frame assembly 1 bear various complex loads from the cargo box and the road surface. At this time, the multi-dimensional buffer connection mechanism between the battery bracket assembly 2 and the frame assembly 1 starts to work. The composite elastic core sandwiched between the longitudinal fixing plate 26 and the connecting angle steel 13 and between the transverse fixing plate 27 and the connecting ear 14 is in an elastic compression state when the frame assembly 1 vibrates vertically or left and right. When vertical vibration occurs, the composite elastic core is compressed, the elastic pad 4 undergoes elastic deformation to absorb vibration energy, and the metal pad 5 evenly distributes pressure and limits excessive deformation. When left and right lateral vibration occurs, the composite elastic core undergoes shear deformation, and the energy is also absorbed through the shear elastic deformation of the elastic pad 4, thereby effectively isolating the transmission of frame vibration to the battery bracket assembly 2. At the same time, the locking bolt 6 connects through to ensure reliable fixation of each connection part.

[0050] When the battery pack 3 needs to be replaced, the operator first axially compresses the anti-detachment outer tube 7, causing the positioning block 710 to disengage from the positioning slot 79. Then, the anti-detachment outer tube 71 is rotated 80° so that the inclined surface at the front end of the anti-detachment rod 71 is set downward. At this time, the second compression spring 77 pushes the retaining ring 78 to reset the anti-detachment outer tube 7, and the positioning block 710 is re-engaged into the positioning slot 79 to achieve rotational positioning. Then, the battery pack 3 is pulled outward. Due to the change in the direction of the inclined surface, the anti-detachment rod 71 compresses the first compression spring 75 under the action of the pulling force and retracts into the anti-detachment outer tube 7, disengaging from the anti-detachment groove 31. The battery pack 3 can then be pulled out smoothly, completing the disassembly.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery frame connection structure for a side-swappable mining vehicle, comprising a frame assembly (1), characterized in that: Battery bracket assemblies (2) are provided on both sides of the frame assembly (1), and battery packs (3) are placed on the battery bracket assemblies (2); a transverse connection part and a longitudinal connection part are provided between the battery bracket assembly (2) and the frame assembly (1), and a composite elastic core is provided between the connection parts of the battery bracket assembly (2) and the frame assembly (1). The composite elastic core includes elastic gaskets (4) and metal gaskets (5) arranged in multiple layers of staggered lamination. When the frame assembly (1) vibrates vertically or left and right, the composite elastic core at the connection part is in an elastically compressed state; the battery bracket assembly (2) An anti-detachment outer tube (7) is rotatably connected to the side facing the battery pack (3). An anti-detachment rod (71) is elastically connected inside the anti-detachment outer tube (7). An anti-detachment groove (31) is provided on the side wall of the battery pack (3). The front end of the anti-detachment rod (71) is limited and placed in the anti-detachment groove (31). The front end of the anti-detachment rod (71) is provided with a slope. When the slope is set upward, the front end of the anti-detachment rod (71) is locked in the anti-detachment groove (31) to fix the battery pack (3). When the slope is set downward, the front end of the anti-detachment rod (71) is disengaged from the anti-detachment groove (31) to disassemble the battery pack (3).

2. The battery frame connection structure for side-swapping mining trucks according to claim 1, characterized in that: The frame assembly (1) includes a subframe (11) and a main frame (12). A connecting angle steel (13) is welded to the outer wall of the subframe (11), and a connecting lug (14) is welded to the outer wall of the main frame (12). The battery bracket assembly (2) includes an L-shaped middle support plate (21) and an L-shaped side support plate (22). A longitudinal fixing plate (26) is connected to the top of the L-shaped middle support plate (21) and the L-shaped side support plate (22), and a transverse fixing plate (27) is connected to the body of the L-shaped middle support plate (21) and the L-shaped side support plate (22). The longitudinal fixing plate (26) and the transverse fixing plate (27) are arranged perpendicular to each other. The longitudinal fixing plate (26) is aligned with the connecting angle steel (13), and the transverse fixing plate (27) is aligned with the connecting ear (14). A composite elastic core is sandwiched between the longitudinal fixing plate (26) and the connecting angle steel (13) and between the transverse fixing plate (27) and the connecting ear (14). Locking bolts (6) are connected through the longitudinal fixing plate (26) and the connecting angle steel (13) and between the transverse fixing plate (27) and the connecting ear (14).

3. The battery frame connection structure for side-swapping mining vehicles according to claim 2, characterized in that: The L-shaped side support plates (22) are symmetrically arranged on both sides of the L-shaped middle support plate (21). A cross brace beam (23) is connected between the corresponding support plates on both sides of the frame assembly (1). Each support plate of the battery bracket assembly (2) is welded and fixed with a Z-shaped connecting plate (210) on the side facing the frame assembly (1). Both ends of the cross brace beam (23) are welded and fixed with a butt plate (211). The butt plate (211) and the Z-shaped connecting plate (210) are fixedly connected by bolts, and the Z-shaped connecting plate (210) is bolted to the cross brace beam (23).

4. The battery frame connection structure for side-swapping mining vehicles according to claim 2, characterized in that: Each of the battery bracket assembly (2) has a limiting plate (28) and multiple channel steels (29) welded and fixed on the side of each bracket facing the frame assembly (1). The limiting plate (28) is welded above the channel steels (29) and fits against the lower wing surface of the main frame (12).

5. The battery frame connection structure for side-swapping mining vehicles according to claim 2, characterized in that: The vertical outer edge of the L-shaped side support plate (22) is vertically welded with a side baffle (24). Multiple connecting struts (25) are welded and fixed between the horizontal outer edge of the L-shaped side support plate (22) and the side baffle (24). Several rotating rollers (212) are embedded in the inner side of the connecting struts (25), and the rotating rollers (212) are in contact with the side wall of the battery pack (3).

6. The battery frame connection structure for side-swapping mining trucks according to claim 5, characterized in that: The bottom end of the connecting support rod (25) located in the middle part is connected to the anti-detachment outer tube (7). The anti-detachment outer tube (7) has an anti-detachment rod movable cavity (72) for movably inserting the anti-detachment rod (71). The inner side wall of the anti-detachment rod movable cavity (72) has a limiting groove (73). The outer side wall of the anti-detachment rod (71) is fixed with an anti-detachment rod limiting slider (74). The anti-detachment rod limiting slider (74) is slidably embedded in the limiting groove (73). The anti-detachment rod movable cavity (72) is also provided with a first compression spring (75). One end of the first compression spring (75) abuts against the rear end of the anti-detachment rod (71), and the other end of the first compression spring (75) abuts against the bottom of the anti-detachment rod movable cavity (72).

7. The battery frame connection structure for side-swapping mining vehicles according to claim 6, characterized in that: The anti-detachment outer tube (7) is also provided with an annular inner groove (76). A second compression spring (77) and a retaining ring (78) are provided in the annular inner groove (76). One end of the second compression spring (77) abuts against the bottom of the annular inner groove (76), and the other end of the second compression spring (77) abuts against the retaining ring (78). The outer wall of the anti-detachment outer tube (7) is also provided with a positioning slot (79). The connecting support rod (25) is used to pass through the inner wall of the cavity of the anti-detachment outer tube (7) and is fixedly connected to a positioning block (710). When the anti-detachment rod (71) rotates to the position of inclined surface upward or downward, the positioning block (710) is limited and locked in the positioning slot (79), and the positioning block (710) is attached to one side of the retaining ring (78).

8. The battery frame connection structure for side-swapping mining vehicles according to claim 1, characterized in that: The number of laminated layers of the elastic pad (4) and metal pad (5) of the composite elastic core is 3-8 layers, and the outermost sides of both sides of the composite elastic core are elastic pads (4). The elastic pad (4) is made of rubber material, and the metal pad (5) is made of stainless steel material. The surface of the metal pad (5) is provided with anti-slip texture.

9. The battery frame connection structure for side-swapping mining vehicles according to claim 3, characterized in that: The subframe (11) is made of thick-walled high-strength steel welded together. The main frame (12) is a flexible frame structure. The battery bracket assemblies (2) on both sides form an integral connection structure through the cross bracing beam (23), and the cross bracing beam (23) is a steel rectangular tube structure.

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