Bolting method for front panel and rear panel of battery box body of commercial vehicle

Abstract

The invention relates to the technical field of automobile manufacturing, in particular to a bolting method for a front panel and a rear panel of a battery box body of a commercial vehicle, and solves the problems that in the prior art, welding easily causes sheet welding penetration, thread loosening and welding residual stress and deformation. A bolting method for a front panel and a rear panel of a battery box of a commercial vehicle comprises the steps that nuts are firmly fixed to the box through a bolting tool, and then bolts penetrate through corresponding hole positions to be tightly connected with the panels. Welding is replaced by bolting, the fastening efficiency and reliability of connection are improved, the use cost is reduced, the detachability of the structure is enhanced, and later maintenance and upgrading are facilitated. Meanwhile, the bolting process is simple and quick, the influence on base metal is small, the production period is effectively shortened, and the stability and the safety of the whole structure of the battery box body are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and in particular to a method for bolting front and rear panels of a battery box of a commercial vehicle. Background Art

[0002] As one of the core components of new energy vehicles, the battery box of commercial vehicles bears the important responsibility of protecting the battery pack and ensuring the stable operation of the battery system. Its structural design is not only related to the safety performance of the battery, but also directly affects the endurance and lightweight level of the entire vehicle. Among them, the connection technology between the front and rear panels of the battery box and the box body is the key guarantee for the structural strength of the battery box.

[0003] The connection technology between the front and rear panels of the battery box and the box body is not only related to the overall structural strength of the battery box, but also directly affects the sealing performance and lightweight design of the battery system. At present, the connection technology between the front and rear panels and the box body in commercial vehicle battery boxes mainly adopts friction stir welding (FSW).

[0004] Friction stir welding uses the heat generated by the friction between the rotating stirring needle and the shoulder and the base material as the heat source to achieve plasticization and flow of the base material, and finally obtain a welded joint with a fine forging structure. This ensures that the length error and eccentricity of the weldment after welding are controlled within a very small range, thereby ensuring the dimensional accuracy and geometric accuracy of the weldment.

[0005] However, the shortcomings of stir friction welding are also obvious: First, the energy consumption of stir friction welding is relatively high. The high-speed rotating stirring tool and the large axial pressure consume a lot of electrical energy, which not only increases the production cost, but also may affect the lightweight design of the battery case. Secondly, for extremely thin weldments or battery cases made of special materials or complex structures, there is a risk of welding through the parent material or failing to meet the welding requirements. At the same time, the "keyhole" phenomenon that often appears at the end of the stir friction welding weld may also have an adverse effect on the strength and sealing of the weld.

[0006] In summary, although stir friction welding has many advantages in the connection technology of the front and rear panels of the battery box and the box body, its shortcomings such as high energy consumption, limited adaptability to special materials and structures, and quality problems at the end of the weld still need to be solved. Therefore, we urgently need a method for bolting the front and rear panels of the battery box of a commercial vehicle to overcome the limitations of the existing technology, improve the structural strength, sealing and lightweight level of the battery box, and provide strong support for the sustainable development of new energy vehicles. Summary of the invention

[0007] The purpose of the present invention is to provide a method for bolting the front and rear panels of a commercial vehicle battery box to solve the following technical problems: the energy consumption of stir friction welding is relatively high, and the high-speed rotating stirring tool and the large axial pressure consume a large amount of electrical energy, which not only increases the production cost, but also may affect the lightweight design of the battery box.

[0008] The purpose of the present invention can be achieved through the following technical solutions: A method for bolting front and rear panels of a commercial vehicle battery box, comprising the following steps: Step 1, preparation stage: place the box and two panels on the load-bearing bottom plate of the bolting fixture, clamp the box through the bolting fixture, and clamp and suspend the two panels at the same time; Step 2, suspension movement stage: move the panel to the bolting position on the top of the box through the bolting tooling; Step 3, lifting and adjustment stage: lift the box through the bolting tooling, make the bolting connection position correspond to the connection point of the panel, and keep the box away from the position of the bolting tooling to leave space for bolting; Step 4: Bolting operation: Bolt the two panels together using bolting tools and bolts to ensure that the bolting is firm and the position is accurate; Step 5, complete the unloading: After the bolting is completed, reverse the above steps in sequence, that is, first release the clamping force on the panel, then lower the box, and finally release the clamping force on the box, and remove the installed box from the bolting tooling.

[0009] As a further solution of the present invention: the bolted tooling comprises a bearing bottom plate, a box positioning and lifting mechanism arranged at the center of the top of the bearing bottom plate, and two movable suspension mechanisms symmetrically arranged on both sides of the top of the bearing bottom plate, a loading cavity is arranged at the center of the bottom of the bearing bottom plate, and a plurality of side grooves are arranged on both sides, and the box positioning and lifting mechanism comprises a positioning component and a lifting structure arranged on the top of the bearing bottom plate; The positioning assembly includes a plurality of clamping plates, a connecting rod fixedly connected to the bottom of one side of the clamping plate, and a horizontal pushing structure. The clamping plate is movably arranged inside the side groove, one end of the connecting rod slides through the side wall of the supporting base plate and extends to the inside of the loading cavity, the horizontal pushing structure is arranged inside the loading cavity and the output end is movably matched with the ends of the plurality of connecting rods to drive the corresponding two clamping plates to move closer and farther away from each other.

[0010] As a further solution of the present invention: a rotating groove is opened at the center of one end of the connecting rod away from the clamping plate, and fixed plates are fixedly connected to both sides of one end. A rotating wheel is rotatably connected inside the rotating groove, and one side of each of the fixed plates is connected to the inner wall of the loading cavity through a compression spring.

[0011] As a further solution of the present invention: the horizontal pushing structure includes a moving rod, a movable sleeve and an electric telescopic rod horizontally arranged at the center of the loading cavity, the movable sleeve is slidably connected to one end of the moving rod and the end is connected to the inner wall of the loading cavity, the electric telescopic rod is connected to the top of the loading cavity through a mounting bracket and the output end is connected to the end of the moving rod, the moving rod has a horizontal linear array with several moving frames, and each of the moving frames is provided with inclined surfaces on both sides, and the inclined surfaces are in contact with the adjacent rotating wheels.

[0012] As a further solution of the present invention: a movable groove is opened at the center of the side wall of each of the splints, and the lifting structure includes a lifting frame and a plurality of lifting cylinders respectively arranged on both sides of the bearing base plate. The lifting frame is composed of a plurality of transverse lifting rods and a plurality of longitudinal lifting rods, and both ends of each of the longitudinal lifting rods pass through adjacent movable grooves and are connected to the output end of the lifting cylinder.

[0013] As a further solution of the present invention: a hidden groove matching the shape of the lifting frame is provided on the top of the bearing base plate, guide brackets are connected to both sides of the top of the bearing base plate, and inclined guide surfaces are provided on the sides where the two guide brackets are close to each other.

[0014] As a further solution of the present invention: pushing cylinders are installed on both sides of the top of the supporting base plate, and the movable suspension mechanism includes a moving frame slidingly connected to the top of the supporting base plate and a clamping suspension assembly connected to the top of one side of the moving frame, and the output end of the pushing cylinder is connected to the side wall of the adjacent moving frame.

[0015] As a further solution of the present invention: the clamping and suspension assembly includes an installation box, an installation frame and two movable blocks, the installation box is connected to the top of one side of the movable frame, and a movable groove is opened on one side of the installation box, the installation frame is fixedly connected at the inner center of the installation box, and the interior of the installation frame is connected with an electromagnet, the two movable blocks are movably connected inside the installation box and are respectively located at two sides of the installation frame, two clamping plates 2 are slidably connected inside the movable groove, and the two clamping plates 2 are respectively connected to the side walls of adjacent movable blocks, and the adjacent sides of the two movable blocks are connected with a magnet plate for magnetically cooperating with the electromagnet.

[0016] As a further solution of the present invention: guide rods are arranged at four corners on one side of each movable block, one end of the guide rod passes through the movable block through a sliding sleeve and is connected to the side wall of the installation frame, and the other end is connected to the inner wall of the installation box.

[0017] As a further solution of the present invention: the first clamp and the second clamp are both made of metal material, and one side of the first clamp and the second clamp is connected to a rubber pad, and the side wall of the rubber pad is provided with a plurality of anti-slip grooves.

[0018] Beneficial effects of the present invention: 1. The bolting technology used in the present invention not only effectively avoids the risk of material damage and unstable threaded connection caused by welding, but also improves the fastening efficiency and reliability of the connection, reducing the overall cost of use. At the same time, the excellent detachability of the bolted structure provides great convenience for the later maintenance, upgrading and replacement of the battery box. The replacement of components can be completed quickly without a complicated disassembly process, which greatly extends the service life of the equipment and improves its flexibility. In addition, this method simplifies the construction process, speeds up the installation speed, and shortens the production cycle of commercial vehicle battery boxes; 2. The present invention adopts the combination of the box positioning and lifting mechanism and the movable suspension mechanism to achieve accurate positioning and stable support of the battery box, avoiding assembly errors and quality problems caused by shaking or offset of the battery box during the bolting process. This not only improves the accuracy and efficiency of the bolting, but also ensures the overall structural strength and stability of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the structure of the panel and the cover of the present invention; Figure 2 It is a structural schematic diagram of the load-bearing bottom plate of the present invention; Figure 3 It is a schematic diagram of the structure of the side groove and the hidden groove of the present invention; Figure 4 It is a schematic diagram of the structure of the clamping suspension assembly of the present invention; Figure 5 It is a structural schematic diagram of the positioning assembly of the present invention; Figure 6 It is a structural schematic diagram of the lifting frame of the present invention; Figure 7 It is a structural schematic diagram of the clamping plate 1 and the movable frame of the present invention; Figure 8 It is a structural schematic diagram of the rotating groove and the rotating wheel of the present invention.

[0021] In the figure: 1, panel; 2, cover; 3, box; 4, bearing bottom plate; 5, lifting frame; 6, positioning assembly; 7, clamping suspension assembly; 8, moving frame; 9, pushing cylinder; 10, side groove; 11, hidden groove; 12, guide bracket; 501, lifting cylinder; 502, longitudinal lifting rod; 504, transverse lifting rod; 601, clamping plate one; 602, moving frame; 603, inclined plane; 604, moving rod; 605, movable sleeve; 606, electric telescopic rod; 607, movable groove; 608, connecting rod; 609, extrusion spring; 610, fixing plate; 611, rotating wheel; 612, rotating groove; 701, clamping plate two; 702, magnet plate; 703, movable block; 704, mounting frame; 705, electromagnet; 706, moving groove; 707, guide rod; 708, mounting box. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1 See also Figure 1-8 As shown, a method for bolting the front and rear panels of a commercial vehicle battery box according to this embodiment includes the following steps: Step 1, preparation stage: place the box 3 on the bearing bottom plate 4 and ensure that it is aligned with the box positioning and lifting mechanism. Start the electric telescopic rod 606 in the horizontal push structure, through the coordinated action of the moving rod 604, the movable sleeve 605 and the moving frame 602, use the inclined surface 603 to squeeze the rotating wheel 611, so that the connecting rod 608 drives the clamping plate 1 601 to move in the side groove 10, thereby loosening the clamping of the box 3. After the box 3 is correctly placed, the electric telescopic rod 606 is retracted in the opposite direction, so that the moving frame 602 returns to its original position, cancels the squeezing of the rotating wheel 611, and the clamping plate 1 601 restores the elastic clamping force under the action of the squeezing spring 609, and tightly clamps the box 3.

[0024] Step 2, suspension movement stage: the movable frame 8 is pushed by the push cylinder 9 to move the clamping suspension assembly 7 to the position of the panel 1. The electromagnet 705 is energized with current to generate magnetic force, attracting or repelling the magnet plate 702, driving the movable block 703 and the second clamping plate 701 to slide in the movable groove 706, clamping the panel 1, and the guide rod 707 and the sliding sleeve provide guidance for the movement of the movable block 703 to ensure stable clamping.

[0025] Step three, lifting and adjustment stage: by extending and retracting the lifting cylinder 501, the longitudinal lifting rod 502 is driven to slide in the movable groove 607 of the clamp plate 601, so that the lifting frame 5 rises, and the box 3 is lifted to the bolted position, and the panel 1 is also moved to the docking position at the top of the box 3 through the movable suspension mechanism.

[0026] Step 4: Bolting operation: Bolt the two panels 1 together using bolting tools and bolts to ensure that the bolting is firm and the position is accurate.

[0027] Step 5, complete unloading: reverse the above steps in sequence, first release the clamping force of the second clamping plate 701 by turning off the power of the electromagnet 705, then drive the movable frame 8 back to its original position by pushing the cylinder 9, then contract the lifting cylinder 501 to lower the box 3, and finally extend the electric telescopic rod 606 to loosen the clamping plate 1 601, and remove the installed battery box from the bolting tooling.

[0028] The effect achieved by the present invention is that the panel 1 is firmly fixed to the box body 3 by bolting. It not only effectively solves the problems of welding penetration and thread slippage that are easy to occur in the process of welding nuts for metal thin plates and thin tubes, but also improves the fastening efficiency and reduces the cost of use, and has high disassembly. This disassembly makes the maintenance and transformation of steel structures extremely convenient, and can quickly respond to the needs of structural adjustments or component replacements. In addition, bolted construction is simpler and faster than welding technology, which significantly shortens the construction period and speeds up the project progress. More importantly, the bolted connection has a minimal impact on the parent material, avoiding the residual stress and deformation problems that may occur during the welding process, thereby ensuring the stability and durability of the overall structure.

[0029] Embodiment 2 A method for bolting the front and rear panels of a commercial vehicle battery box according to this embodiment is as follows: Figure 1-8 As shown, the bolting tooling includes a bearing bottom plate 4, a box positioning and lifting mechanism arranged at the top center of the bearing bottom plate 4, and two movable suspension mechanisms symmetrically arranged on both sides of the top of the bearing bottom plate 4. A loading cavity is provided at the bottom center of the bearing bottom plate 4, and a plurality of side grooves 10 are provided on both sides. The box positioning and lifting mechanism includes a positioning component 6 and a lifting structure arranged on the top of the bearing bottom plate 4. like Figure 5 , Figure 7 and Figure 8As shown, the positioning assembly 6 includes a plurality of splints 601, a connecting rod 608 fixedly connected to the bottom of one side of the splint 601, and a horizontal pushing structure. The splint 601 is movably arranged inside the side groove 10, one end of the connecting rod 608 slides through the side wall of the supporting base plate 4 and extends to the inside of the loading cavity, the horizontal pushing structure is arranged inside the loading cavity and the output end is movably matched with the ends of the plurality of connecting rods 608 to drive the corresponding two splints 601 to move closer and farther away from each other.

[0030] A rotating groove 612 is provided at the center of one end of the connecting rod 608 away from the splint 1 601, and fixed plates 610 are fixedly connected on both sides of one end. The interior of the rotating groove 612 is rotatably connected to a rotating wheel 611, and one side of each fixed plate 610 is connected to the inner wall of the loading cavity through an extrusion spring 609. Specifically, through the setting of the extrusion spring 609, an elastic extrusion force can be generated on the connecting rod 608, so that the splint 1 601 is used to fit closely to the side groove 10, that is, an elastic clamping force is always generated.

[0031] A movable groove 607 is provided at the center of the side wall of each splint 601. The lifting structure includes a lifting frame 5 and a plurality of lifting cylinders 501 respectively arranged on both sides of the bearing base plate 4. The lifting frame 5 is composed of a plurality of transverse lifting rods 504 and a plurality of longitudinal lifting rods 502. Both ends of each longitudinal lifting rod 502 pass through adjacent movable grooves 607 to be connected with the output end of the lifting cylinder 501. Specifically, when it is necessary to lift the box 3, first, the clamping degree of the splint 601 is loosened so that the box 3 can be lifted and moved between the plurality of splints 601, and the plurality of splints 601 perform surrounding guidance and limit on the box 3. Next, the lifting cylinder 501 is telescoped to drive the longitudinal lifting rod 502 to slide in the movable groove 607 of the splint 601, thereby driving the lifting frame 5 to rise or fall, thereby realizing the lifting and positioning of the box 3, achieving the effect of facilitating the bolting operation and ensuring the accurate bolting position.

[0032] Furthermore, a hidden groove 11 matching the shape of the lifting frame 5 is provided at the top of the bearing bottom plate 4, and guide brackets 12 are connected to both sides of the top of the bearing bottom plate 4, and inclined guide surfaces are provided on the sides where the two guide brackets 12 are close to each other. Specifically, the hidden groove 11 provides a storage space for the lifting frame 5, ensuring the flatness of the top of the bearing bottom plate 4 while cooperating with the clamping plate 601 without interfering with each other, making the tooling more compact, and the inclined guide surface of the guide bracket 12 facilitates the placement and positioning of the box body 3, thereby achieving the effect of improving the practicality and convenience of operation of the tooling. Embodiment 3 A method for bolting the front and rear panels of a commercial vehicle battery box according to this embodiment is as follows: Figure 1-8As shown, the horizontal pushing structure includes a moving rod 604, a movable sleeve 605 and an electric telescopic rod 606 horizontally arranged at the center of the loading cavity. The movable sleeve 605 is slidably connected to one end of the moving rod 604 and the end is connected to the inner wall of the loading cavity. The electric telescopic rod 606 is connected to the top of the loading cavity through a mounting bracket and the output end is connected to the end of the moving rod 604. The moving rod 604 has a plurality of moving frames 602 in a horizontal linear array, and each of the moving frames 602 is provided with inclined surfaces 603 on both sides, and the inclined surfaces 603 are in contact with the adjacent rotating wheels 611.

[0033] During the working process: when it is necessary to clamp the box 3, the electric telescopic rod 606 is extended and retracted to drive the moving rod 604 to slide in the movable sleeve 605, and the moving frame 602 on the moving rod 604 will squeeze the rotating wheel 611 through the fit between the inclined surface 603 and the rotating wheel 611, so that the rotating wheel 611 rotates in the rotating groove 612, and drives the connecting rod 608 and the clamping plate 601 to move, so that the two adjacent clamping plates 601 are moved away from each other. At this time, the box 3 can be placed on the supporting bottom plate 4, and then the electric telescopic rod 606 is extended and retracted to drive the moving rod 604 to return to its original position, so that the squeezing of the rotating wheel 611 by the moving frame 602 can be cancelled, so that the clamping plate 601 can restore its elastic clamping force and clamp the box 3. Therefore, by controlling the movement of the moving frame 602, the position and clamping force of the clamping plate 601 can be adjusted.

[0034] Embodiment 4 A method for bolting the front and rear panels of a commercial vehicle battery box according to this embodiment is as follows: Figure 1-8 As shown, pushing cylinders 9 are installed on both sides of the top of the bearing base plate 4, and the movable suspension mechanism includes a moving frame 8 slidingly connected to the top of the bearing base plate 4 and a clamping suspension assembly 7 connected to the top of one side of the moving frame 8. The output end of the pushing cylinder 9 is connected to the side wall of the adjacent moving frame 8. Specifically, the pushing cylinder 9 is extended and retracted to drive the moving frame 8 to slide on the bearing base plate 4, thereby driving the clamping suspension assembly 7 to move, thereby realizing the clamping, suspension and movement of the panel 1.

[0035] Furthermore, the clamping and suspending assembly 7 includes a mounting box 708, a mounting frame 704 and two movable blocks 703. The mounting box 708 is connected to the top of one side of the movable frame 8, and a movable groove 706 is opened on one side of the mounting box 708. The mounting frame 704 is fixedly connected to the inner center of the mounting box 708, and the interior of the mounting frame 704 is connected with an electromagnet 705. The two movable blocks 703 are movably connected inside the mounting box 708 and are respectively located on both sides of the mounting frame 704. Two clamping plates 701 are slidably connected inside the movable groove 706, and the two clamping plates 701 are respectively connected to the side walls of adjacent movable blocks 703. The adjacent sides of the two movable blocks 703 are connected with a magnet plate 702 for magnetically cooperating with the electromagnet 705. Both the first and second splints 601 and 701 are made of metal material, and one side of the first and second splints 601 and 701 is connected with a rubber pad, and the side wall of the rubber pad is provided with a plurality of anti-skid grooves. Specifically, when an electric current is passed through the electromagnet 705, a magnetic force is generated to attract or repel the magnet plate 702, so that the movable block 703 drives the second splint 701 to slide in the movable groove 706, which can clamp or release the panel 1, realize the rapid clamping and release of the panel 1, and achieve the effect of improving the bolting efficiency and operational flexibility. The metal splints 601 and 701 ensure the clamping strength and durability, while the rubber pad and the anti-skid groove increase the friction between the box body 3 and the panel 1, prevent sliding and falling off, and achieve the effect of improving the clamping stability and safety.

[0036] Furthermore, guide rods 707 are provided at the four corners on one side of each movable block 703. One end of the guide rod 707 passes through the movable block 703 through a sliding sleeve and is connected to the side wall of the mounting frame 704, and the other end is connected to the inner wall of the mounting box 708. Specifically, the guide rod 707 and the sliding sleeve provide guidance and support for the movement of the movable block 703, ensuring the stability and accuracy of the clamping plate 2 701 when clamping the panel 1, thereby achieving the effect of enhancing the structural rigidity and stability of the clamping suspension assembly 7.

[0037] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for bolting front and rear panels of a commercial vehicle battery box, characterized in that: The following steps are involved: Step 1, preparation stage: placing the box body (3) and the two panels (1) on the bearing bottom plate (4) of the bolting fixture, clamping the box body (3) by the bolting fixture, and clamping and suspending the two panels (1) at the same time; Step 2, the suspension movement stage: the panel (1) is moved to the bolting position on the top of the box (3) by means of a bolting tool; Step 3, lifting and adjustment stage: lift the box (3) by means of the bolting tooling, so that the bolting connection position corresponds to the connection position of the panel (1), and move the box (3) away from the position of the bolting tooling to leave space for bolting; Step 4: Bolting operation: Bolting the two panels (1) together using bolting tools and bolts to ensure that the bolting is firm and the position is accurate; Step 5, complete unloading: After the bolting is completed, the above steps are reversed in sequence, that is, first release the clamping force on the panel (1), then lower the box (3), and finally release the clamping force on the box (3), and remove the installed box (3) from the bolting tooling.

2. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 1, characterized in that: The bolting tooling comprises a bearing base plate (4), a box positioning and lifting mechanism arranged at the top center of the bearing base plate (4), and two movable suspension mechanisms symmetrically arranged on both sides of the top of the bearing base plate (4); a loading cavity is provided at the bottom center of the bearing base plate (4), and a plurality of side grooves (10) are provided on both sides; the box positioning and lifting mechanism comprises a positioning component (6) and a lifting structure arranged at the top of the bearing base plate (4); The positioning assembly (6) includes a plurality of clamping plates (601), a connecting rod (608) fixedly connected to the bottom of one side of the clamping plate (601), and a horizontal pushing structure. The clamping plate (601) is movably arranged inside the side groove (10), and one end of the connecting rod (608) slides through the side wall of the supporting base plate (4) and extends to the inside of the loading cavity. The horizontal pushing structure is arranged inside the loading cavity and the output end is movably matched with the ends of the plurality of connecting rods (608) to drive the corresponding two clamping plates (601) to move closer or farther away from each other.

3. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 2, characterized in that: A rotation groove (612) is provided at the center of one end of the connecting rod (608) away from the clamping plate (601), and fixed plates (610) are fixedly connected to both sides of one end. A rotating wheel (611) is rotatably connected inside the rotation groove (612), and one side of each of the fixed plates (610) is connected to the inner wall of the loading cavity via a compression spring (609).

4. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 3, characterized in that: The horizontal propulsion structure comprises a moving rod (604) horizontally arranged at the center of the loading cavity, a movable sleeve (605) and an electric telescopic rod (606); the movable sleeve (605) is slidably connected to one end of the moving rod (604) and the end is connected to the inner wall of the loading cavity; the electric telescopic rod (606) is connected to the top of the loading cavity through a mounting bracket and the output end is connected to the end of the moving rod (604); the moving rod (604) has a plurality of moving frames (602) in a horizontal linear array, and both sides of each of the moving frames (602) are provided with inclined surfaces (603), and the inclined surfaces (603) are in contact with the adjacent rotating wheels (611).

5. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 3, characterized in that: A movable groove (607) is provided at the center of the side wall of each of the clamping plates (601), and the lifting structure comprises a lifting frame (5) and a plurality of lifting cylinders (501) respectively arranged on both sides of the bearing base plate (4). The lifting frame (5) is formed by combining and splicing a plurality of transverse lifting rods (504) and a plurality of longitudinal lifting rods (502), and both ends of each of the longitudinal lifting rods (502) pass through adjacent movable grooves (607) to be connected to the output end of the lifting cylinder (501).

6. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 5, characterized in that: The top of the bearing base plate (4) is provided with a hidden groove (11) that matches the shape of the lifting frame (5), and both sides of the top of the bearing base plate (4) are connected to guide brackets (12), and the sides of the two guide brackets (12) that are close to each other are provided with inclined guide surfaces.

7. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 2, characterized in that: Push cylinders (9) are installed on both sides of the top of the supporting base plate (4), and the movable suspension mechanism includes a moving frame (8) slidably connected to the top of the supporting base plate (4) and a clamping suspension component (7) connected to the top of one side of the moving frame (8), and the output end of the pushing cylinder (9) is connected to the side wall of the adjacent moving frame (8).

8. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 7, characterized in that: The clamping and suspension assembly (7) comprises a mounting box (708), a mounting frame (704) and two movable blocks (703); the mounting box (708) is connected to the top of one side of the movable frame (8); a movable groove (706) is provided on one side of the mounting box (708); the mounting frame (704) is fixedly connected to the inner center of the mounting box (708); an electromagnet (705) is connected to the inside of the mounting frame (704); the two movable blocks (703) are movably connected to the inside of the mounting box (708) and are respectively located at two sides of the mounting frame (704); two clamping plates (701) are slidably connected to the inside of the movable groove (706); the two clamping plates (701) are respectively connected to the side walls of adjacent movable blocks (703); and the adjacent sides of the two movable blocks (703) are both connected to a magnet plate (702) for magnetically cooperating with the electromagnet (705).

9. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 8, characterized in that: Guide rods (707) are provided at four corners on one side of each movable block (703); one end of the guide rod (707) passes through the movable block (703) through a sliding sleeve and is connected to the side wall of the installation frame (704); the other end of the guide rod (707) is connected to the inner wall of the installation box (708).

10. A method for bolting front and rear panels of a commercial vehicle battery box according to claim 8, characterized in that: The first clamping plate (601) and the second clamping plate (701) are both made of metal material, and one side of the first clamping plate (601) and the second clamping plate (701) are connected to a rubber pad, and the side wall of the rubber pad is provided with a plurality of anti-slip grooves.

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