A mine truck power battery assembly convenient to install and quickly replace

Abstract

The present application belongs to the technical field of mine vehicle power battery, especially relates to a mine vehicle power battery assembly convenient to install and quickly replace, aiming at the problem of insufficient reliability of internal power battery installation and replacement under the condition that the battery box has been in place, the present application proposes the following scheme, which comprises a power battery, a battery box, a bottom frame and a bottom support frame, the bottom support frame is provided with a push-pull assembly and a plurality of rollers, the push-pull assembly realizes bidirectional operation; the power battery is connected with a positioning rail and a butt joint rod, the battery box is connected with a butt joint rail, the three are connected through the linkage of wedge-shaped clamping blocks and push rods to realize wedge-shaped self-locking; a guide frame unit is connected with the bottom support frame through a chain passing through the door frame to form a movable pulley mechanism, and a lifting fine adjustment unit is arranged on the chain. The present application integrates height lifting and accurate positioning in one, can complete the quick replacement of the internal power battery of the battery box by a single person, and ensures the fixing reliability of the power battery under harsh working conditions through the wedge-shaped self-locking and bolt hole double locking mechanism.

Description

Technical Field

[0001] This invention relates to a power battery assembly, specifically a power battery assembly for mining vehicles that is easy to install and quick to replace, belonging to the field of power battery technology for mining vehicles. Background Technology

[0002] With the rapid breakthroughs in new energy technologies and the comprehensive advancement of the mine electrification strategy, the demand for pure electric wide-body mining trucks and electric mining trucks in open-pit mines continues to grow. To meet the requirements of heavy load, long range, and continuous operation, mining trucks must be equipped with larger capacity and more power batteries. This directly leads to an increase in the size and number of battery packs, and the weight of the battery assembly also increases significantly. With the enlargement of the battery pack frame, the assembly difficulty of power batteries in hoisting, positioning, docking, and fastening has increased significantly. In addition, the compact chassis space and harsh working conditions of mining vehicles have resulted in low assembly efficiency and high operational risks, which have become key pain points affecting vehicle production.

[0003] Currently, some solutions for replacing and installing power batteries in mining trucks have emerged in existing technologies. For example, CN117962578A discloses a quick-change battery device for mining vehicles, including battery components, a gripping mechanism, and a front chassis. It can perform operations such as battery loading, lifting, lowering, and unloading via lifting cylinders and support rods. However, its gripping mechanism relies on the insertion port and fixing part on the front chassis for cooperation. The battery replacement process still requires external hoisting or forklift equipment, making single-person operation impossible. Furthermore, access to hoisting equipment is often limited in the narrow space of a mining vehicle chassis. Another example is a quick-change base for a new energy mining truck battery pack disclosed in CN219801123U, which includes a support frame, a coarse positioning system, a fine positioning system, a locking system, and a floating joint. It uses a dual positioning system of coarse and fine positioning to ensure the battery pack does not shift. However, its positioning and locking systems employ multiple guide pillars and cylinder drive structures, resulting in numerous components, a large space occupation, and the locking process relying on an external air source and control system. If the air source is interrupted or the control system malfunctions, locking cannot be completed. The aforementioned existing technologies generally have the following drawbacks: First, the battery assembly mainly includes the battery box and the internal power battery. However, the installation and replacement of the power battery inside the battery assembly still heavily relies on external hoisting equipment, forklifts, or dedicated battery swapping stations. The mining vehicles are stopped at the work site for a long time while waiting for replacement, which restricts the attendance rate. Second, the guiding accuracy during the battery pushing process is insufficient, which can easily cause jamming or deflection, resulting in damage to the battery casing or electrode tabs. Third, when the battery is subjected to severe vibrations from the harsh mining road conditions during vehicle operation, the locking mechanism is prone to loosening, posing a safety hazard of battery displacement or detachment. Summary of the Invention

[0004] This invention addresses the problem that existing mining trucks, where the installation and replacement of power batteries inside the pre-fixed battery box still heavily rely on external hoisting equipment and suffer from insufficient locking reliability, by providing a mining truck power battery assembly that is easy to install and quick to replace.

[0005] The present invention achieves the above objectives through the following technical solution: a mining vehicle power battery assembly that is easy to install and quick to replace, including a power battery and a battery box, and also including a base frame, wherein the power battery is placed on the base frame, and the base frame is provided with a push-pull component for installing and replacing the battery box and several rollers for supporting the power battery. The power battery is connected to a positioning rail, and a docking rod is movably installed inside the positioning rail. The battery box is connected to a docking rail. When the power battery is installed in the battery box, part of the docking rod slides and engages with the docking rail. When the power battery is fully installed in the battery box and the bottom support frame is removed, the positioning rail, docking rod, and docking rail are wedge-shaped and self-locking. The bottom support frame has a door frame and a guide frame unit at the end away from the power battery. The door frame is movably connected to the guide frame unit, and the bottom support frame is movably connected to the door frame. A chain that passes around the door frame connects the guide frame unit and the bottom support frame. The bottom support frame moves the power battery up and down synchronously with the lifting and lowering of the door frame. A lifting and fine-tuning unit is also provided on the chain. When the door frame is kept stable, the lifting and fine-tuning unit finely adjusts the bottom support frame to move the power battery up and down.

[0006] As a further aspect of the present invention: the positioning rail is C-shaped and elongated, with two positioning rails fixedly connected to the outer walls of the long sides of the power battery respectively. The docking rod is square and elongated, and can move up and down within the positioning rail. A limiting slot is provided on the side of the docking rod closest to the positioning rail. A wedge-shaped locking block is connected within the track groove of the positioning rail, and the wedge-shaped locking block is movably locked within the limiting slot. A push rod is movably connected through the body of the docking rod. One end of the push rod is in contact with the wedge-shaped locking block, and the other end of the push rod is connected to a rubber pad. In the initial state, the docking rod rests against the bottom surface of the track groove of the positioning rail due to its own weight, and the rubber pad is embedded within the body of the docking rod when the docking rod is in the initial state. When the docking rod moves upward within the positioning rail, it drives the wedge-shaped locking block to push the push rod outward.

[0007] As a further embodiment of the present invention: a dovetail limiting groove is provided on the side of the wedge-shaped card block that is in contact with the push rod, and a dovetail limiting slider is connected to the end of the push rod that is in contact with the wedge-shaped card block, and the dovetail limiting slider is movably locked in the dovetail limiting groove.

[0008] As a further embodiment of the present invention: the docking rail is C-shaped and long, and two docking rails are fixedly connected to the inner walls of the long sides of the battery box respectively. The docking rails are correspondingly set with the positioning rails, and several triangular ribs are fixedly connected between the upper and lower sides of the docking rails and the inner walls of the battery box.

[0009] As a further embodiment of the present invention: the battery box has several equally spaced docking holes at the connection part of the docking rail, the docking holes are arranged sequentially along the rail body direction of the docking rail and penetrate the rail body, the rod body of the docking rod has several threaded holes, the rail body of the positioning rail has several limiting bottom holes, and the docking holes, threaded holes and limiting bottom holes are arranged correspondingly; when the docking rod moves upward to the top surface of the track groove of the positioning rail, the docking holes, threaded holes and limiting bottom holes are aligned and connected coaxially.

[0010] As a further embodiment of the present invention: a base frame is provided below the base support frame, and a number of supporting base tubes are connected to the frame body of the base frame. Two limiting clamps are connected to the tube body of the supporting base tubes. The battery box is placed on the supporting base tubes, and the battery box is clamped between the limiting clamps on both sides.

[0011] As a further embodiment of the present invention: the guide frame unit includes two vertically arranged guide columns, the bottom ends of which are fixedly connected to the base frame. The door frame is vertically movably inserted between the two guide columns. A hydraulic cylinder support rod located directly below the door frame is fixedly connected to the base frame. A hydraulic cylinder support is fixedly connected to the body of the hydraulic cylinder support rod. A single-stage hydraulic cylinder connected to an external hydraulic system is provided between the hydraulic cylinder support rod and the door frame. The cylinder body of the single-stage hydraulic cylinder is connected to the hydraulic cylinder support by a pin. The telescopic rod of the single-stage hydraulic cylinder is connected to the bottom surface of the door frame by bolts.

[0012] As a further embodiment of the present invention: a movable front frame is provided at the end of the base frame away from the guide frame unit. Several rollers are rotatably connected inside the movable front frame. A front baffle is connected to the front end of the movable front frame. The push-pull assembly includes a front frame hydraulic cylinder and a battery hydraulic cylinder. Both the front frame hydraulic cylinder and the battery hydraulic cylinder are multi-stage hydraulic cylinders that are independently connected to the external hydraulic system and can be driven bidirectionally. The front frame hydraulic cylinder is located below the rollers. The cylinder body of the front frame hydraulic cylinder is fixedly connected to the base frame. The front end of the telescopic rod of the front frame hydraulic cylinder is fixedly connected to the movable front frame. The battery hydraulic cylinder is located above the rollers. A positioning pressure plate is fixedly connected between the cylinder body of the battery hydraulic cylinder and the base frame. A U-shaped push-pull bracket is fixedly connected to the front end of the telescopic rod of the battery hydraulic cylinder. A push-pull handle is connected to the end of the power battery near the U-shaped push-pull bracket. When the power battery is placed on the rollers connected to the base frame, the push-pull handle is movably installed inside the U-shaped push-pull bracket.

[0013] As a further embodiment of the present invention: the upper ends of the two guide columns of the guide frame unit are connected to end reinforcing plates, and the inner sides of the two guide columns are provided with door frame guide grooves. Door frame limiting clips are placed in the door frame guide grooves. The side walls of the two guide columns are provided with support frame guide grooves. The long side of the bottom support frame is fixedly connected to a guide wheel positioning plate. The four corners of the guide wheel positioning plate are rotatably connected to guide wheels. The guide wheels are respectively limited and clipped in the support frame guide grooves. The outer sides of the two guide columns are provided with slider support grooves. Support sliders are slidably arranged in the slider support grooves. Diagonal braces are connected between the front end of the long side of the bottom support frame and the support slider, and between the middle part of the long side of the bottom support frame and the support slider. Support rollers are embedded in both sides of the block body of the support slider, and the support rollers are tightly attached to the side walls of the slider support groove.

[0014] As a further embodiment of the present invention: two sprocket supports are fixedly connected to the top frame of the door frame, and sprockets for bypassing the chain are rotatably connected to the sprocket supports. One end of the chain is fixedly connected to the end reinforcing plate, and the other end of the chain is fixedly connected to the frame of the bottom support frame. The lifting and fine-tuning unit includes an outer support plate, a positioning roller, a roller connecting ear, and a fine-tuning roller. The outer support plate is fixedly connected to the end reinforcing plate, and the positioning roller is connected to the outer support plate through the roller connecting ear. Two positioning rollers and one fine-tuning roller are provided on the chain. The fine-tuning roller is located in the middle of the two positioning rollers, and the positioning roller is placed on the side of the chain away from the outer support plate, while the fine-tuning roller is placed on the side of the chain close to the outer support plate. A docking shaft is rotatably connected between the fine-tuning rollers provided on the two chains. A fine-tuning hydraulic cylinder connected to an external hydraulic system is fixedly connected to the outer support plate, and the front end of the telescopic rod of the fine-tuning hydraulic cylinder is fixedly connected to the middle part of the docking shaft.

[0015] The beneficial effects of this invention are: 1. This invention includes a power battery and a battery box, as well as a base frame. The power battery is placed on the base frame, which is equipped with a push-pull assembly for installing and replacing the battery box and several rollers for supporting the power battery. By setting up the base frame, the power battery does not need to slide and rub directly against the battery box. Instead, the power battery is first placed on the base frame, and then the base frame uses the push-pull assembly to assemble or separate the power battery from the battery box. This reduces the risk of wear and tear on the power battery during installation and replacement, and eliminates the need for manual entry into the narrow battery box for installation and replacement. At the same time, the rollers change the contact between the power battery and the base frame from sliding friction to rolling friction, making the push-pull action more effortless and smooth. Even under heavy load conditions, it can be operated by a single person. In addition, the base frame is a modular component that can be pulled out as a whole, which facilitates the pre-installation of the power battery under the vehicle and then pushing it into the battery box as a whole, greatly shortening the downtime for replacement of mining vehicles on site. 2. The present invention features a power battery connected to a positioning rail, within which a docking rod is movably mounted, and a battery box connected to a docking rail. When the power battery is installed in the battery box, part of the docking rod slides and engages with the docking rail. When the power battery is fully installed in the battery box and the bottom support frame is removed, the positioning rail, docking rod, and docking rail are wedge-shaped self-locking fixed. The positioning rail, docking rail, and docking rod together form a three-layer guiding positioning. During the power battery insertion process, the docking rod first enters the docking rail to achieve initial guidance, effectively preventing deviation and jamming. When the power battery is fully in place and the bottom support frame is removed, the wedge-shaped self-locking structure automatically locks all three together, achieving initial positioning of the power battery and achieving the effect of locking upon insertion. Furthermore, the wedge-shaped self-locking utilizes the principle of inclined plane force amplification, ensuring that the locking force does not decrease even when the vehicle experiences severe bumps in harsh mining conditions, eliminating the safety hazard of the power battery loosening or shifting during use. 3. The bottom support frame of this invention has a door frame and a guide frame unit at the end away from the power battery. The door frame is movably connected to the guide frame unit, and the bottom support frame is movably connected to the door frame. A chain that bypasses the door frame connects the guide frame unit and the bottom support frame. The bottom support frame moves the power battery up and down synchronously with the lifting and lowering of the door frame. A lifting and fine-tuning unit is also provided on the chain. When the door frame is in a stable state, the lifting and fine-tuning unit fine-tunes the bottom support frame to move the power battery up and down. The connection method of the chain bypassing the door frame forms a movable pulley mechanism, which converts the small lifting and lowering stroke of the door frame into double the stroke of the bottom support frame. This allows for a wide range of height adjustment of the power battery within a limited vertical space, which is particularly suitable for the compact installation environment of mining truck chassis. The lifting and fine-tuning unit can still independently fine-tune the height of the bottom support frame after the door frame is locked, which can achieve precise positioning of the lifting and lowering height of the power battery. This facilitates millimeter-level precise alignment between the docking rod and the docking rail, avoiding insertion jamming or sealing failure due to height deviation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the power battery structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the wedge-shaped locking block and the push rod in this invention. Figure 4 This is a schematic diagram of the cross-sectional structure of the threaded hole and the limiting bottom hole of the present invention. Figure 5 This is a schematic diagram of the battery box structure of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the battery box of the present invention; Figure 7 This is a schematic diagram of the connection structure of the base frame, guide frame unit, and door frame of the present invention; Figure 8This is a schematic diagram of a partial connection between the guide post and the door frame of the present invention; Figure 9 This is a schematic diagram of the guide frame unit structure of the present invention; Figure 10 This is a schematic diagram of the door frame structure of the present invention; Figure 11 This is a schematic diagram of the structure by which the lifting and fine-tuning unit of the present invention adjusts the state of the chain. Figure 12 This is a schematic diagram of the connection structure of the positioning roller, the fine-tuning roller, and the docking shaft of the present invention; Figure 13 This is a schematic diagram of the overall structure of the base frame of the present invention; Figure 14 This is a schematic diagram of the cross-sectional structure of the base frame of the present invention; Figure 15 This is a schematic diagram of the connection structure between the base frame and the guide wheel positioning plate of the present invention.

[0017] In the diagram: 1. Power battery; 11. Push-pull handle; 12. Positioning rail; 13. Connecting rod; 14. Rubber pad; 15. Threaded hole; 16. Limiting slot; 17. Wedge-shaped locking block; 18. Push rod; 19. Limiting bottom hole; 110. Dovetail limiting slide groove; 111. Dovetail limiting slider; 2. Battery box; 21. Connecting rail; 22. Triangular rib plate; 23. Connecting through hole; 3. Base frame; 31. Support base tube; 32. Limiting clamp; 33. Hydraulic cylinder support rod; 34. Hydraulic cylinder support; 35. Single-stage hydraulic cylinder; 4. Guide column; 41. End reinforcing plate; 42. Door frame guide groove ; 43. Support frame guide groove; 44. Slider support groove; 5. Door frame; 51. Sprocket support; 52. Sprocket; 6. Bottom support frame; 61. Movable front frame; 62. Front end baffle; 63. Roller; 64. Front frame hydraulic cylinder; 65. Battery hydraulic cylinder; 66. Positioning pressure plate; 67. U-shaped push-pull bracket; 68. Guide wheel positioning plate; 69. Guide wheel; 610. Diagonal brace; 611. Support slider; 612. Support roller; 7. Chain; 71. Outer support plate; 72. Positioning roller; 73. Roller connecting ear; 74. Fine-tuning roller; 75. Docking shaft; 76. Fine-tuning hydraulic cylinder. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 like Figures 1 to 15As shown, a mining truck power battery assembly that is easy to install and quickly replace includes a power battery 1 and a battery box 2, as well as a base frame 6. The power battery 1 is mounted on the base frame 6. The base frame 6 is equipped with a push-pull assembly for installing and replacing the battery box 2 and several rollers 63 for supporting the power battery 1. By setting the base frame 6, the power battery 1 does not need to slide and rub directly against the battery box 2. Instead, the power battery 1 is first placed on the base frame 6, and the base frame 6 then uses the push-pull assembly to assemble or detach the power battery 1 from the battery box 2, thereby reducing the pressure on the power battery 1. The wear and tear risks during installation and replacement mean that the installation and replacement of the power battery 1 can be carried out without manual access to the narrow battery box 2. At the same time, several rollers 63 change the contact between the power battery 1 and the bottom support frame 6 from sliding friction to rolling friction, making the pushing and pulling action more effortless and smooth. Even under heavy load conditions, the operation can be completed by a single person. In addition, the bottom support frame 6 is a modular component that can be pulled out as a whole, which makes it easy to pre-install the power battery 1 under the vehicle and then push it into the battery box 2 as a whole, which greatly shortens the downtime replacement time of the mining truck on site. The power battery 1 is connected to a positioning rail 12, and a docking rod 13 is movably installed inside the positioning rail 12. The battery box 2 is connected to a docking rail 21. When the power battery 1 is installed in the battery box 2, part of the docking rod 13 slides and engages with the docking rail 21. When the power battery 1 is fully installed in the battery box 2 and the bottom support frame 6 is pulled out, the positioning rail 12, the docking rod 13, and the docking rail 21 are wedge-shaped self-locking fixed. The positioning rail 12 and the docking rail 21, together with the docking rod 13, form a three-layer guide positioning. During the process of pushing the power battery 1 in, the docking rod 13 first enters the docking rail 21 to achieve preliminary guidance, effectively preventing deviation and jamming. When the power battery 1 is fully in place and the bottom support frame 6 is pulled out, the wedge-shaped self-locking structure automatically locks the three together, achieving preliminary positioning of the power battery 1 and achieving the effect of locking as soon as it is pushed in. Moreover, the wedge-shaped self-locking utilizes the principle of inclined plane force amplification, so even if the vehicle is violently bumped in the harsh conditions of mining, the locking force will not decrease, eliminating the safety hazard of the power battery 1 loosening and shifting during use. The bottom support frame 6, at the end furthest from the power battery 1, is equipped with a door frame 5 and a guide frame unit. The door frame 5 is movably connected within the guide frame unit, and the bottom support frame 6 is movably connected within the door frame 5. A chain 7, bypassing the door frame 5, connects the guide frame unit and the bottom support frame 6. The bottom support frame 6 moves up and down synchronously with the door frame 5, driving the power battery 1 to move up and down. A lifting fine-tuning unit is also provided on the chain 7. When the door frame 5 remains stable, the lifting fine-tuning unit finely adjusts the bottom support frame 6 to drive the power battery 1 to move up and down. The connection method of the chain 7 bypassing the door frame 5 forms a movable pulley mechanism, which transforms the small lifting stroke of the door frame 5 into double the stroke of the bottom support frame 6, achieving a wide range of height adjustment of the power battery 1 within a limited vertical space. It is particularly suitable for the compact installation environment of mining truck chassis; the lifting and fine-tuning unit can still independently fine-tune the height of the bottom support frame 6 after the door frame 5 is locked, which can achieve precise positioning of the lifting height of the power battery 1, and facilitate millimeter-level precise alignment between the docking rod 13 and the docking rail 21, avoiding insertion jamming or sealing failure due to height deviation. It should be noted that regarding the feasibility of single-end lifting of the bottom support frame 6, as is common knowledge, forklifts are a mature technology carrier widely used in the field of industrial vehicles. The way the forks (attachment frame) and mast system of forklifts cooperate is consistent with the lifting method of the bottom support frame 6 in the door frame 5 in this application. The forklift forks are a typical single-end force structure. It should be further noted that the fit between the forklift mast and fork carriage is common knowledge in the field and has been clearly described in relevant technical specifications and engineering design manuals, such as the forklift industry standard JB / T3300-2010. According to this standard, the clearance between the forklift mast and the rollers must not exceed 1.5mm, and sliding should be smooth and without obstruction. Based on this common knowledge of forklift structure, those skilled in the art can reasonably expect that the base frame 6 of this application can achieve smooth lifting and lowering under the same multi-point guide constraint conditions.

[0020] Example 2 Improvements based on Example 1: like Figures 1 to 6As shown, the positioning rail 12 is a C-shaped strip. Two positioning rails 12 are fixedly connected to the outer walls of the long sides of the power battery 1. The docking rod 13 is a square strip and can move up and down within the positioning rail 12. A limit slot 16 is provided on the side of the docking rod 13 closest to the positioning rail 12. A wedge-shaped locking block 17 is connected in the track groove of the positioning rail 12. The wedge-shaped locking block 17 is movably locked in the limit slot 16. A push rod 18 is movably connected through the rod body of the docking rod 13. One end of the push rod 18 is in contact with the wedge-shaped locking block 17, and the other end of the push rod 18 is connected to a rubber pad 14. In the initial state, the docking rod 13 rests against the bottom surface of the track groove of the positioning rail 12 due to its own weight. When the docking rod 13 is in the initial state, the rubber pad 14 is embedded in the rod body of the docking rod 13. When the docking rod 13 moves upward within the positioning rail 12, it drives the wedge-shaped locking block 17. Block 17 pushes the push rod 18 outward, using the weight of the docking rod 13 to sink to its initial position, allowing the rubber pad 14 to be embedded and preventing premature interference with the inner wall of the battery box 2 during the push-in process, ensuring smooth push-in action; when the bottom support frame 6 is pulled out, the power battery 1 will drive the positioning rail 12 to move downward, and the docking rod 13 will be limited by the docking rail 21, that is, the docking rod 13 can move upward relative to the positioning rail 12, the wedge-shaped locking block 17 is forced to push the push rod 18 outward, and the rubber pad 14 will then press tightly against the inner wall of the docking rail 21, forming a lateral tension force, eliminating the lateral gap between the power battery 1 and the battery box 2, and avoiding abnormal noise and impact caused by vehicle vibration; the cooperation between the limiting slot 16 and the wedge-shaped locking block 17 prevents the docking rod 13 from moving excessively upward and detaching from the rail, and at the same time, the wedge structure has a self-locking characteristic, and will not automatically retract in a vibration environment.

[0021] Furthermore, a dovetail limiting groove 110 is provided on the side of the wedge-shaped locking block 17 that is in contact with the push rod 18. A dovetail limiting slider 111 is connected to the end of the push rod 18 that is in contact with the wedge-shaped locking block 17. The dovetail limiting slider 111 is movably locked in the dovetail limiting groove 110. The cooperation between the dovetail limiting groove 110 and the dovetail limiting slider 111 forms a sliding guide and limiting constraint, ensuring that the push rod 18 can only move outward in a preset straight line direction under the push of the wedge-shaped locking block 17, and will not deflect or disengage. Even when the mine car is violently vibrating or subjected to lateral impact, the two still maintain a stable contact transmission relationship. In addition, the surface contact form of the dovetail fit can evenly distribute the thrust on the push rod 18, avoiding local wear or jamming caused by point contact.

[0022] like Figures 1 to 6As shown, the docking rail 21 is a C-shaped strip, and two docking rails 21 are fixedly connected to the inner walls of the long sides of the battery box 2 respectively. The docking rail 21 is set in correspondence with the positioning rail 12. Several triangular ribs 22 are fixedly connected between the upper and lower sides of the docking rail 21 and the inner wall of the battery box 2. The C-shaped docking rail 21 set on the inner wall of the battery box 2 forms an inner and outer nested guide channel with the positioning rail 12 on the power battery 1, so that the power battery 1 always moves along a straight trajectory during the pushing process, avoiding jamming caused by box deformation or installation deviation. The two docking rails 21 on each side form a double-point support, which enhances the stability of the guide and prevents the power battery 1 from warping or swaying at the end of the pushing. The triangular ribs 22 form a triangular reinforcement structure between the docking rail 21 and the inner wall of the battery box 2, which improves the load-bearing capacity and impact resistance of the docking rail 21. Even if the battery box 2 is twisted and deformed under harsh mining conditions, the docking rail 21 can still maintain its relative position accuracy, ensuring that the battery can still be replaced smoothly after long-term use.

[0023] Furthermore, the battery box 2 has several equally spaced docking holes 23 at the connection point of the docking rail 21. The docking holes 23 are arranged sequentially along the rail body of the docking rail 21 and penetrate the rail body of the docking rail 21. The rod body of the docking rod 13 has several threaded holes 15, and the rail body of the positioning rail 12 has several limiting bottom holes 19. The docking holes 23, threaded holes 15, and limiting bottom holes 19 are arranged correspondingly. When the docking rod 13 moves upward to be close to the top surface of the track groove of the positioning rail 12, the docking holes 23, threaded holes 15, and limiting bottom holes are closed. The three holes 19 are coaxially aligned. When the power battery 1 is fully pushed into the battery box 2 and the docking rod 13 is raised to its limit position, the three holes automatically align. At this time, the power battery 1 and the battery box 2 can be mechanically locked again by inserting bolts, forming a double insurance with the wedge self-locking. The equally spaced docking holes 23 provide multiple locking positions, and single-point or multi-point locking can be selected according to the vibration resistance requirements of different vehicle models. The hole alignment can also serve as an indicator to determine whether the power battery 1 is installed in place. If the holes cannot be aligned, it means that it has not been pushed in, avoiding safety accidents caused by misjudgment.

[0024] like Figure 1 , Figures 7 to 15As shown, a base frame 3 is provided below the base support frame 6. Several supporting base tubes 31 are connected to the frame of the base frame 3. Two limiting clamps 32 are connected to the tubes of the supporting base tubes 31. The battery box 2 is placed on the supporting base tubes 31 and clamped between the limiting clamps 32 on both sides. The base frame 3 lifts the battery box 2 to a certain height through the supporting base tubes 31, making it easy for the base support frame 6 to be inserted or removed from below. The supporting base tubes 31 adopt a tubular structure, which reduces the overall weight while ensuring sufficient support strength. The two limiting clamps 32 are located on both sides of the battery box 2, forming a lateral limit to prevent the battery box 2 from moving laterally during the process of pushing in the power battery 1, and to ensure the precise alignment of the docking rail 21 and the positioning rail 12. It should be noted that the limiting clamps 32 can also adopt an adjustable design, that is, the spacing can be adjusted by shims or elongated holes to adapt to battery boxes 2 of different widths, thereby improving the versatility of the tooling.

[0025] Furthermore, the guide frame unit includes two vertically arranged guide columns 4, the bottom ends of which are fixedly connected to the base frame 3. The door frame 5 is vertically movably inserted between the two guide columns 4. A hydraulic cylinder support rod 33 located directly below the door frame 5 is fixedly connected to the base frame 3. A hydraulic cylinder support 34 is fixedly connected to the body of the hydraulic cylinder support rod 33. A single-stage hydraulic cylinder 35 connected to an external hydraulic system is provided between the hydraulic cylinder support rod 33 and the door frame 5. The cylinder body of the single-stage hydraulic cylinder 35 is connected to the hydraulic cylinder support 34 by a pin. The telescopic rod of the single-stage hydraulic cylinder 35 is connected to the bottom surface of the door frame 5 by bolts. The column 4 provides a rigid lifting guide for the door frame 5, ensuring that the door frame 5 can only move vertically under the drive of the single-stage hydraulic cylinder 35 without tilting or twisting, thus ensuring smooth transmission of the chain 7; the cylinder support rod 33 raises the installation position of the single-stage hydraulic cylinder 35 to directly below the door frame 5, so that the thrust of the hydraulic cylinder acts directly on the bottom center of the door frame 5, avoiding jamming of the door frame 5 due to uneven load; the pin connection allows the single-stage hydraulic cylinder 35 to swing slightly during the extension and retraction process, adapting to processing and assembly errors, and facilitating disassembly and maintenance; the bolt connection ensures reliable fixation between the telescopic rod and the door frame 5, preventing loosening.

[0026] Furthermore, a movable front frame 61 is provided at the end of the base frame 6 away from the guide frame unit. Several rollers 63 are rotatably connected inside the movable front frame 61. A front baffle 62 is connected to the front end of the movable front frame 61. The push-pull assembly includes a front frame hydraulic cylinder 64 and a battery hydraulic cylinder 65. Both the front frame hydraulic cylinder 64 and the battery hydraulic cylinder 65 are multi-stage hydraulic cylinders that can be driven bidirectionally and are independently connected to the external hydraulic system. The front frame hydraulic cylinder 64 is located below the rollers 63. The cylinder body of the front frame hydraulic cylinder 64 is fixedly connected to the base frame 6. The front end of the telescopic rod of the front frame hydraulic cylinder 64 is fixedly connected to the movable front frame 61. A battery hydraulic cylinder 65 is positioned above the roller 63. A positioning pressure plate 66 is fixedly connected between the cylinder body of the battery hydraulic cylinder 65 and the base support frame 6. A U-shaped push-pull bracket 67 is fixedly connected to the front end of the telescopic rod of the battery hydraulic cylinder 65. A push-pull handle 11 is connected to one end of the power battery 1 near the U-shaped push-pull bracket 67. When the power battery 1 is placed on the roller 63 connected to the base support frame 6, the push-pull handle 11 is movably installed inside the U-shaped push-pull bracket 67. The telescopic rod of the battery hydraulic cylinder 65 can drive the U-shaped push-pull bracket 67 in both directions, and the U-shaped push-pull bracket 67 can hook the push-pull handle 11 of the power battery 1. 1. This enables a two-way operation function, allowing the power battery 1 to be pushed from the base frame 6 into the battery box 2, and to be pulled back from the battery box 2 onto the base frame 6. This changes the traditional operation mode of replacing batteries in mining trucks, which relies on hoisting equipment or manual pry bars. During installation, the battery hydraulic cylinder 65 extends, smoothly pushing the power battery 1 into the battery box 2 along the roller 63; during disassembly, the battery hydraulic cylinder 65 retracts, smoothly pulling the power battery 1 out of the battery box 2 onto the base frame 6. The entire process effectively avoids safety accidents such as bumps and injuries caused by battery slippage and loss of control; the front frame hydraulic cylinder 6... 4. Independent control of the battery hydraulic cylinder 65 allows the movable front frame 61 to extend or retract in a timely manner according to the pushing and pulling direction: when pulling out the battery, the movable front frame 61 extends first to receive the pulled-out battery; when pushing in the battery, the movable front frame 61 also extends to extend the raceway to ensure that the battery always has continuous rolling support. It should be noted that both the bottom support frame 6 and the movable front frame 61 are frame structures welded from high-strength rectangular steel pipes, and the bottom support frame 6 and the movable front frame 61 can also be equipped with multiple transverse reinforcing ribs on the frame body to improve their bending stiffness, which is sufficient to withstand the bending moment generated by single-end lifting under full load. It should be further explained that the material mechanical property parameters (such as the elastic modulus E=200~210GPa and yield strength ≥235MPa of Q235B steel) and the calculation formulas for the mechanical parameters of the steel structure section (such as moment of inertia I and section modulus W) involved in the structural strength and stiffness design of the base frame 6 of this application are all conventional basic knowledge and common knowledge that those skilled in the art should master in mechanical structure design. When reading this application and implementing the technical solution, those skilled in the art can independently complete the necessary conventional calculations and parameter selection based on the above common knowledge, without having to repeat and enumerate them item by item in the specification. The weight of the power battery involved in this application is about 500kg (about 1000 catties), which is a conventional weight range in the field of engineering machinery and industrial lifting. The base frame 6 of this application adopts a high-strength rectangular steel pipe welded frame structure (multiple transverse reinforcing ribs can be set on the frame body), combined with a multi-point rigid constraint mechanism of four-point guide wheels and guide grooves, comprehensively ensuring the load-bearing strength and lifting stability from multiple dimensions such as material selection, section design, welding process, and guide limit. Based on the above disclosure and common knowledge in the field, those skilled in the art can reasonably be certain that the technical solution of this application can achieve the technical effect of supporting and smoothly raising and lowering a power battery of approximately 500 kg.

[0027] like Figure 9 , Figure 13 , Figure 14 and Figure 15As shown, the upper ends of the two guide columns 4 of the guide frame unit are connected to end reinforcing plates 41. The inner sides of the two guide columns 4 are fitted with door frame guide grooves 42. The door frame 5 is limited and placed in the door frame guide grooves 42. The two side walls of the two guide columns 4 are provided with support frame guide grooves 43. The long side of the bottom support frame 6 is fixedly connected to a guide wheel positioning plate 68. The four corners of the guide wheel positioning plate 68 are rotatably connected to guide wheels 69. The guide wheels 69 are respectively limited and placed in the support frame guide grooves 43. The outer sides of the two guide columns 4 are provided with slider support grooves 44. The support slider 611 is slidably placed in the slider support grooves 44. The front end of the long side of the bottom support frame 6 and the support slider 611, as well as the middle part of the long side of the bottom support frame 6 and the support slider 611 are connected. Each of the supporting sliders 611 is connected by a diagonal brace 610. Supporting rollers 612 are embedded in both sides of the slider 611, and these rollers are tightly attached to the side walls of the slider support groove 44. End reinforcing plates 41 connect the two guide columns 4 into a rigid whole, preventing the guide columns 4 from opening or closing during lifting and ensuring the perpendicularity of the door frame guide groove 42 and the support frame guide groove 43. The door frame 5 is directly inserted into the door frame guide groove 42, which is a sliding friction guide. The bottom support frame 6 rolls within the support frame guide groove 43 via guide wheels 69, converting sliding friction into rolling friction and reducing the resistance during lifting and lowering. A guide wheel 69 is installed at each of the four corners of the guide wheel positioning plate 68, forming... The rectangular four-point support ensures that the base frame 6 remains horizontal during lifting and lowering, preventing tilting and ensuring the docking accuracy between the power battery 1 and the battery box 2. A diagonal brace 610 connects the front and middle parts of the base frame 6 to the support slider 611, forming a stable triangular support structure with the guide constraint of the slider support groove 44. When the base frame 6 is lifted from one end, the diagonal brace 610 effectively transmits and balances the overturning moment generated by the gravity of the power battery 1 at the front end of the base frame 6, suppressing rotation and bending deformation of the base frame 6, ensuring that the base frame 6 remains horizontal during lifting and lowering, thus smoothly raising the power battery 1 to the position of the battery box 2 inlet. At the same height, the support roller 612 is tightly attached to the two side walls of the slider support groove 44, converting sliding friction into rolling friction. This ensures that the support slider 611 can slide freely along the vertical direction of the guide post 4 as the base support frame 6 rises and falls, while the tight fit between the roller and the groove wall forms a rigid constraint in the horizontal direction. The guide wheel 69 is mainly responsible for the posture constraint and horizontal limit of the rear and middle rear sections of the base support frame 6. The combination of the diagonal brace 610 and the support slider 611 is responsible for the vertical support and overturning moment balance of the front and middle front sections of the base support frame 6. The two complement each other in terms of function, together forming a full-length, multi-dimensional constraint on the base support frame 6, ensuring that the base support frame 6 can achieve smooth lifting and lowering movement under single-end lifting conditions.

[0028] like Figure 7 , Figure 8 , Figure 10 , Figure 11 and Figure 12 As shown, two sprocket supports 51 are fixedly connected to the top frame of the door frame 5. Sprockets 52 for bypassing the chain 7 are rotatably connected to the sprocket supports 51. One end of the chain 7 is fixedly connected to the end reinforcing plate 41, and the other end of the chain 7 is fixedly connected to the frame of the bottom support frame 6. The lifting and fine-tuning unit includes an outer support plate 71, a positioning roller 72, a roller connecting ear 73, and a fine-tuning roller 74. The outer support plate 71 is fixedly connected to the end reinforcing plate 41. The positioning roller 72 is connected to the outer support plate 71 through the roller connecting ear 73. Two positioning rollers 72 and one fine-tuning roller 74 are provided on the chain 7. The fine-tuning roller 74 is located in the middle of the two positioning rollers 72, and the positioning rollers 72 are placed on the side of the chain 7 away from the outer support plate 71. The fine-tuning roller 74 is placed on the side of the chain 7 close to the outer support plate 71. A docking shaft is rotatably connected between the fine-tuning rollers 74 provided on the two chains 7. 75. A fine-tuning hydraulic cylinder 76, which is connected to an external hydraulic system, is fixedly connected to the outer support plate 71. The front end of the telescopic rod of the fine-tuning hydraulic cylinder 76 is fixedly connected to the middle part of the docking shaft 75. The sprocket 52 enables the chain 7 to smoothly change direction, realizing a flexible connection between the bottom support frame 6 and the end reinforcing plate 41. The lifting fine-tuning unit forms alternating pressure on both sides of the chain 7 through two positioning rollers 72 and one fine-tuning roller 74. When the telescopic rod of the fine-tuning hydraulic cylinder 76 extends, the fine-tuning roller 74 presses the chain 7 to produce bending deformation, thereby changing the effective working length of the chain 7 and realizing precise fine-tuning of the height of the bottom support frame 6. This fine-tuning method does not require moving the door frame 5 or the single-stage hydraulic cylinder 35. It can be carried out independently when the door frame 5 is locked. The adjustment accuracy is high. The docking shaft 75 ensures that the fine-tuning rollers 74 on both sides move synchronously, avoiding uneven force on both sides of the chain 7, which would cause the bottom support frame 6 to tilt.

[0029] Working principle: First, prepare for installation by fixing the battery box 2 on the support tube 31 of the base frame 3. The horizontal positioning is achieved by the limiting clamps 32 on both sides. The bottom support frame 6 is located in front of the battery box 2. The base frame 3 supports the single-stage hydraulic cylinder 35 through the hydraulic cylinder strut 33 and hydraulic cylinder support 34. The two guide columns 4 of the guide frame unit ensure the vertical lifting of the door frame 5. The power battery 1 is pre-placed on several rollers 63 of the base frame 6. The push-pull handle 11 of the power battery 1 is movably inserted into the U-shaped push-pull bracket 67 connected to the front end of the battery hydraulic cylinder 65. At this time, the docking rod 13 in the positioning rail 12 is placed on the bottom surface of the track groove of the positioning rail 12 due to its own weight. The rubber pad 14 is embedded in the body of the docking rod 13. The external hydraulic system is started, and the telescopic rod of the single-stage hydraulic cylinder 35 pushes the door frame 5 upward. The door frame 5 rises vertically along the door frame guide groove 42 of the guide column 4. At the same time, the diagonal brace 610 is supported by the support slider 611, which together ensures that the base frame 6 always maintains a horizontal posture and does not tilt. Since one end of the chain 7 is fixed to the end reinforcing plate 41, and the other end is fixed to the base frame 6 after passing around the sprocket 52 at the top of the door frame 5, a movable pulley mechanism is formed. When the door frame 5 rises, the chain 7 pulls the base frame 6 to rise synchronously at twice the speed and stroke of the door frame 5, thereby raising the power battery 1 to the same height as the entrance of the battery box 2. Precise positioning is achieved using a lifting and fine-tuning unit. The telescopic rod of the fine-tuning hydraulic cylinder 76 pushes the docking shaft 75, causing the fine-tuning rollers 74 on both sides to press the chain 7 and cause it to bend and deform. With the cooperation of the two positioning rollers 72, the effective working length of the chain 7 is changed, thereby achieving fine-tuning of the height of the bottom support frame 6 and ensuring that the positioning rails 12 on both sides of the power battery 1 are precisely aligned with the docking rails 21 on the inner wall of the battery box 2. Activate the front frame hydraulic cylinder 64, whose telescopic rod pushes the movable front frame 61 forward, extending the roller 63 inside the movable front frame 61 into the battery box 2, providing a continuous rolling support surface for the power battery 1. Then activate the battery hydraulic cylinder 65, whose telescopic rod extends to push the U-shaped push-pull bracket 67. The U-shaped push-pull bracket 67 pushes the power battery 1 forward along the roller 63 into the battery box 2 via the push-pull handle 11. During the pushing process, the positioning rails 12 on both sides of the power battery 1 gradually approach the docking rail 21, and the sinking docking rod 13 contacts and is inserted into the docking rail 21. After the power battery 1 is fully pushed in, restore the lifting fine-tuning unit to its initial state. At this time, the bottom support frame 6 will move downward, and the bottom support frame 6 can be pulled out. The power battery 1 will drive the positioning rails 12 to move downward. When the connecting rod 13 is moved, it is limited by the connecting rail 21, which allows the connecting rod 13 to move upward relative to the positioning rail 12. The wedge-shaped locking block 17 on the positioning rail 12 is forced to push the push rod 18 outward under the constraint of the limiting locking groove 16. The rubber pad 14 at the front end of the push rod 18 is then pressed against the inner wall of the connecting rail 21, generating a lateral tension force to eliminate the lateral gap. At the same time, the dovetail limiting slide groove 110 and the dovetail limiting slider 111 ensure that the push rod 18 moves linearly without deflection. When the connecting rod 13 rises to the top surface of the track groove of the positioning rail 12, the threaded hole 15 of the connecting rod 13, the limiting bottom hole 19 of the positioning rail 12, and the connecting through hole 23 on the battery box 2 are automatically aligned coaxially. The operator can insert bolts for secondary mechanical locking. When it is necessary to disassemble and replace the power battery 1, first loosen the secondary locking bolts, raise the base frame 6 to be below the power battery 1, extend the movable front frame 61, extend the telescopic rod of the battery hydraulic cylinder 65 so that the U-shaped push-pull bracket 67 re-hooks the push-pull handle 11, then raise the base frame 6 to a certain height so that the docking rod 13 moves downward relative to the positioning rail 12 to release the wedge locking, and then retract the telescopic rod of the battery hydraulic cylinder 65, which retracts synchronously with the telescopic rod of the front frame hydraulic cylinder 64, so that the power battery 1 can be smoothly pulled out from the battery box 2 to complete the quick replacement.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] 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 mining truck power battery assembly that is easy to install and quick to replace, comprising a power battery (1) and a battery box (2), characterized in that: It also includes a base frame (6), on which the power battery (1) is placed. The base frame (6) is provided with a push-pull assembly for installing and replacing the battery box (2) and several rollers (63) for supporting the power battery (1). The power battery (1) is connected to a positioning rail (12), and a docking rod (13) is movably installed in the positioning rail (12). The battery box (2) is connected to a docking rail (21). A wedge-shaped locking block (17) is connected in the track groove of the positioning rail (12). A limit slot (16) is opened on the side of the docking rod (13) near the positioning rail (12). The wedge-shaped locking block (17) is movably locked in the limit slot (16). A push rod (18) is movably connected through the rod of the docking rod (13). One end of the push rod (18) is in contact with the wedge-shaped locking block (17), and the other end of the push rod (18) is connected to a rubber pad (14). The power battery (1) is installed When the battery is inside the battery box (2), part of the rod body of the docking rod (13) slides and fits into the docking rail (21); in the initial state, the docking rod (13) is placed on the bottom surface of the track groove of the positioning rail (12) due to its own weight, and when the docking rod (13) is in the initial state, the rubber pad (14) is embedded in the rod body of the docking rod (13); when the power battery (1) is completely installed in the battery box (2) and the bottom support frame (6) is pulled out, the docking rod (13) moves upward in the positioning rail (12), driving the wedge-shaped locking block (17) to push the push rod (18) outward, so that the rubber pad (14) presses against the inner wall of the docking rail (21) to achieve wedge-shaped self-locking fixation; The bottom support frame (6) has a door frame (5) and a guide frame unit at the end away from the power battery (1). The door frame (5) is movably connected to the guide frame unit, and the bottom support frame (6) is movably connected to the door frame (5). The top frame of the door frame (5) is fixedly connected to two sprocket supports (51). A sprocket (52) for passing around a chain (7) is rotatably connected to the sprocket supports (51). One end of the chain (7) is fixedly connected to the end reinforcing plate (41), and the other end of the chain (7) is fixedly connected to the frame of the bottom support frame (6). A chain (7) passing around the sprocket (52) is connected between the guide frame unit and the bottom support frame (6). The bottom support frame (6) moves the power battery (1) up and down synchronously with the lifting and lowering of the door frame (5). The chain (7) is also equipped with The lifting and fine-tuning unit adjusts the bottom support frame (6) to drive the power battery (1) to move up and down when the door frame (5) is kept stable. The lifting and fine-tuning unit includes an outer support plate (71), a positioning roller (72), a roller connecting ear (73), and a fine-tuning roller (74). The outer support plate (71) is fixedly connected to the end reinforcing plate (41). The positioning roller (72) is connected to the outer support plate (71) through the roller connecting ear (73). The chain (7) is provided with two positioning rollers (72) and one fine-tuning roller (74). The outer support plate (71) is fixedly connected to a fine-tuning hydraulic cylinder (76) that is connected to the external hydraulic system. The fine-tuning hydraulic cylinder (76) drives the fine-tuning roller (74) to press the chain (7) to adjust the height of the bottom support frame (6).

2. The mining truck power battery assembly that is easy to install and quick to replace according to claim 1, characterized in that: The positioning rail (12) is C-shaped and has two fixed connections on the outer walls of the long sides of the power battery (1). The docking rod (13) is square and can move up and down inside the positioning rail (12).

3. The mining truck power battery assembly that is easy to install and quick to replace according to claim 1, characterized in that: The wedge-shaped locking block (17) has a dovetail limiting groove (110) on one side that is in contact with the push rod (18). The end of the push rod (18) that is in contact with the wedge-shaped locking block (17) is connected to a dovetail limiting slider (111). The dovetail limiting slider (111) is movably locked in the dovetail limiting groove (110).

4. The mining truck power battery assembly that is easy to install and quick to replace according to claim 1, characterized in that: The docking rail (21) is C-shaped and has two fixed connections on the inner walls of the long sides of the battery box (2). The docking rail (21) is correspondingly set with the positioning rail (12). Several triangular ribs (22) are fixedly connected between the upper and lower sides of the docking rail (21) and the inner wall of the battery box (2).

5. The mining truck power battery assembly that is easy to install and quick to replace according to claim 4, characterized in that: The battery box (2) has several equally spaced docking holes (23) at the connection part of the docking rail (21). The docking holes (23) are arranged sequentially along the rail body of the docking rail (21) and the docking holes (23) penetrate the rail body of the docking rail (21). The rod body of the docking rod (13) has several threaded holes (15) through it. The rail body of the positioning rail (12) has several limiting bottom holes (19). The docking holes (23), threaded holes (15) and limiting bottom holes (19) are arranged correspondingly. When the docking rod (13) moves upward to the top surface of the track groove of the positioning rail (12), the docking holes (23), threaded holes (15) and limiting bottom holes (19) are aligned and connected coaxially.

6. The mining truck power battery assembly that is easy to install and quick to replace according to claim 1, characterized in that: A base frame (3) is provided below the base support frame (6). The frame body of the base frame (3) is connected to several support tubes (31). Two limiting clamps (32) are connected to the tube body of the support tubes (31). The battery box (2) is placed on the support tubes (31) and the battery box (2) is clamped between the limiting clamps (32) on both sides.

7. The mining truck power battery assembly that is easy to install and quick to replace according to claim 6, characterized in that: The guide frame unit includes two vertically arranged guide columns (4). The bottom end of the guide column (4) is fixedly connected to the base frame (3). The door frame (5) is vertically movably inserted between the two guide columns (4). A hydraulic cylinder support rod (33) located directly below the door frame (5) is fixedly connected to the base frame (3). A hydraulic cylinder support (34) is fixedly connected to the body of the hydraulic cylinder support rod (33). A single-stage hydraulic cylinder (35) connected to an external hydraulic system is provided between the hydraulic cylinder support rod (33) and the door frame (5). The cylinder body of the single-stage hydraulic cylinder (35) is connected to the hydraulic cylinder support (34) by a pin. The telescopic rod of the single-stage hydraulic cylinder (35) is connected to the bottom surface of the door frame (5) by bolts.

8. The mining truck power battery assembly that is easy to install and quick to replace according to claim 7, characterized in that: A movable front frame (61) is provided at one end of the base frame (6) away from the guide frame unit. Several rollers (63) are rotatably connected inside the movable front frame (61). A front baffle (62) is connected to the front end of the movable front frame (61). The push-pull assembly includes a front frame hydraulic cylinder (64) and a battery hydraulic cylinder (65). Both the front frame hydraulic cylinder (64) and the battery hydraulic cylinder (65) are multi-stage hydraulic cylinders that can be driven bidirectionally and are independently connected to the external hydraulic system. The front frame hydraulic cylinder (64) is located below the rollers (63). The cylinder body of the front frame hydraulic cylinder (64) is fixedly connected to the base frame (6). The front end of the telescopic rod of the cylinder (64) is fixedly connected to the movable front frame (61). The battery hydraulic cylinder (65) is set above the roller (63). The cylinder body of the battery hydraulic cylinder (65) is fixedly connected to the base frame (6) with a positioning pressure plate (66). The front end of the telescopic rod of the battery hydraulic cylinder (65) is fixedly connected to a U-shaped push-pull bracket (67). The end of the power battery (1) near the U-shaped push-pull bracket (67) is connected to a push-pull handle (11). When the power battery (1) is placed on the roller (63) connected to the base frame (6), the push-pull handle (11) is movably placed inside the U-shaped push-pull bracket (67).

9. The mining truck power battery assembly that is easy to install and quick to replace according to claim 6, characterized in that: The upper ends of the two guide columns (4) of the guide frame unit are connected to end reinforcing plates (41). The inner sides of the two guide columns (4) are fitted with door frame guide grooves (42). The door frame (5) is limited and placed in the door frame guide grooves (42). The two side walls of the two guide columns (4) are provided with support frame guide grooves (43). The long side of the bottom support frame (6) is fixedly connected to a guide wheel positioning plate (68). The four corners of the guide wheel positioning plate (68) are rotatably connected to guide wheels (69). The guide wheels (69) are respectively limited and placed in the support frame guide grooves (43).

10. The mining truck power battery assembly that is easy to install and quick to replace according to claim 9, characterized in that: The fine-tuning roller (74) is located in the middle of the two positioning rollers (72), and the positioning rollers (72) are attached to the side of the chain (7) away from the outer support plate (71), while the fine-tuning roller (74) is attached to the side of the chain (7) close to the outer support plate (71). The fine-tuning rollers (74) on the two chains (7) are rotatably connected to a docking shaft (75), and the front end of the telescopic rod of the fine-tuning hydraulic cylinder (76) is fixedly connected to the middle part of the docking shaft (75).

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