Battery box locking device of battery swap station with vehicle body screw cleaning function

Abstract

The application provides a battery box locking device with a vehicle body screw cleaning function for a battery swap station, and belongs to the technical field of battery box locking. The device comprises a bottom plate and a bracket, a plurality of circular mounting grooves are arranged at the top end of the bracket, a fixing cylinder is arranged in each circular mounting groove, a rotating cylinder is rotatably connected to the inner bottom end of the circular mounting groove through a motor, a connecting block is arranged at the bottom end of the central cavity of the rotating cylinder, a screwing shaft is arranged at the top end of the connecting block through a spring, two push blocks are symmetrically and fixedly connected to the outer side of the screwing shaft, a cleaning assembly and a lubricating assembly are arranged between the fixing cylinder and the rotating cylinder, the cleaning assembly is used for cleaning the outer side of the bolt, and the lubricating assembly is used for lubricating the bolt. Through the cleaning assembly, the composite motion of downward movement and rotation of the bolt is utilized to automatically trigger the scraping of the cleaning plate on the thread gap and the rotary brushing of the cleaning roller on the surface of the bolt. Through the lubricating assembly, the lubricating medium is sprayed to the thread surface being cleaned when the bolt is moving downward, which not only improves the instant cleaning effect, but also provides lubrication guarantee for subsequent installation.

Description

Technical Field

[0001] This invention relates to the field of battery box locking technology, and in particular to a battery box locking device for a battery swapping station with a vehicle body screw cleaning function. Background Technology

[0002] The purpose of battery swapping stations is to replace and maintain vehicle batteries. They consist of a base, rails, and locking mechanisms. The locking device is primarily used for disassembling and installing the battery box screws. Since the stable use of the battery is crucial, the locking device requires high precision. However, during vehicle operation, the screws become contaminated with dust and dirt, severely affecting locking accuracy. Therefore, cleaning of the screws is usually necessary during battery swapping. However, existing battery box locking devices at battery swapping stations have the following problems in use:

[0003] Existing cleaning methods primarily rely on dry physical cleaning, mainly using adjustable high-pressure nozzles to spray dry compressed air to directly blow away loose contaminants, or using soft nylon brushes to rotate and scrub loose mud and sand on the surface of the housing. However, during the cleaning process, bolts, due to long-term use under complex operating conditions, easily accumulate rust, mud, dust, and other contaminants in their thread gaps. Furthermore, the narrow, spiral structure of the bolt thread gaps makes it difficult for existing cleaning methods to reach these narrow gaps for thorough cleaning. This can lead to contaminants interfering with the normal meshing of the threaded pair during subsequent tightening cycles, thus affecting the safety and accuracy of the connection structure. On the other hand, for strongly adhered contaminants and rust, cleaning and lubricating agents need to be used simultaneously during bolt cleaning to soften stubborn contaminants and rust. Additionally, bolts undergo multiple disassembly and assembly operations during battery swapping. During these repeated disassembly and assembly, the bolt threads, lacking lubrication, are in a state of dry friction, easily causing thread wear, hindering quick installation, and making subsequent disassembly difficult or even resulting in bolt failure, thus affecting the reusability of the bolts.

[0004] Therefore, this application provides a battery box locking device for a battery swapping station with a vehicle body screw cleaning function to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a battery box locking device for a battery swapping station with a vehicle body screw cleaning function, so as to solve the problems that existing cleaning methods are not convenient for automatically cleaning the contaminants and rust accumulated in the bolt thread gaps, and that bolts without lubrication are in a dry friction state when in use, which easily causes thread wear, makes it inconvenient to install quickly, and affects the reusability of bolts.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A battery box locking device for a battery swapping station with a vehicle body screw cleaning function includes a base plate and a bracket installed inside the base plate via a drive linkage mechanism. Multiple circular mounting slots at the top of the bracket each house a fixed cylinder. A rotating cylinder is rotatably connected to the bottom of each circular mounting slot via a motor. The rotating cylinder is rotatably mounted in the central cavity of the fixed cylinder via a connecting ring. A connecting block is installed at the bottom of the central cavity of the rotating cylinder. A turning shaft is mounted on the top of the connecting block via a spring. Two actuating blocks are symmetrically fixed to the outside of the turning shaft. The two actuating blocks slide in contact with two sliding holes on the outside of the rotating cylinder. A cleaning component and a lubrication component are provided between the fixed cylinder and the rotating cylinder. The cleaning component is used for cleaning the outside of the bolts, and the lubrication component is used for lubricating the bolts.

[0008] Optionally, the cleaning assembly includes a first gear fixedly connected to the outside of the rotating cylinder. The first gear is symmetrically meshed with two second gears. A rotating rod is fixedly connected to the top of each of the two second gears. A cleaning roller is fixedly connected to the outer surface of the rotating rod. A cleaning brush is installed on the outside of the cleaning roller. The rotating rod is rotatably connected to an opening in the inner wall of the fixed cylinder via a bearing. The cleaning roller is disposed in a transverse through groove in the upper section of the inner wall of the fixed cylinder. Two cleaning boxes are symmetrically installed at the top of the fixed cylinder. A cleaning plate is slidably connected inside each of the two cleaning boxes via a spring. An inclined block is fixedly connected to the bottom of each of the two cleaning plates.

[0009] Optionally, one end of the two cleaning plates is elastically abutted against the outside of the bolt, and the abutting ends of the two cleaning plates are correspondingly arranged with the threaded gap area of ​​the bolt, for cleaning the dirt in the gap during bolt rotation.

[0010] Optionally, the two cleaning plates are arranged alternately up and down along the axial direction of the turning shaft, and the direction of the intersection of the two cleaning plates is consistent with the thread direction of the bolt.

[0011] Optionally, a guide plate is rotatably connected to the outer side of the rotating drum. The guide plate is installed obliquely in the central cavity of the fixed drum. A drain port is provided on the upper outer side of the fixed drum. One end of the guide plate extends and is fixed at the drain port.

[0012] Optionally, the lubrication assembly includes a sealing box, which is installed in an opening in the lower outer section of the fixed cylinder. A piston rod is slidably connected inside the sealing box via a spring seal. A movable ring is connected to the top of the piston rod. The movable ring is slidably sleeved on the outside of the rotating cylinder. The actuating block slides against the movable ring. The sealing box is connected to an oil storage box through an oil inlet at the bottom of the inner cavity. The oil storage box is fixed to the outer wall of the sealing box. A connecting pipe is installed at the top of the oil storage box.

[0013] Optionally, the nozzle at the upper end of the connecting pipe passes through the outer wall of the fixed cylinder and extends to the gap area between the two cleaning rollers, for spraying lubricating medium to clean and lubricate the outer surface of the bolt.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] In the above solution, the cleaning component drives the rotating drum and the turning shaft to rotate during the disassembly of the battery box, smoothly guiding the bolt into the cavity of the fixed cylinder. During this process, the downward movement of the bolt automatically triggers the scraping and cleaning of the cleaning plate. The contact end of the cleaning plate precisely corresponds to the thread gap. In the combined action of the bolt rotating and moving downward, the cleaning plate continuously scrapes the thread gap, effectively removing the attached substances embedded in the gap and completing the gap cleaning. At the same time, the rotational power of the drum is transmitted through the first gear and the second gear, driving the cleaning roller to rotate and brush the bolt, removing the contaminants that have been initially loosened on the bolt surface. This process first involves the cleaning plate performing targeted deep cleaning, and then the rotating cleaning roller performing overall surface purification in a coordinated cleaning, completing the maintenance and cleaning of the bolt and facilitating the quick installation of the bolt when it is reused.

[0016] In the above solution, when the shaft is turned down to drive the bolt through the lubrication component, the actuating block pushes the moving ring downward. The downward movement of the moving ring directly drives the piston rod to compress the chamber inside the sealing box. The pressurized lubricating medium is forced into the oil reservoir through the guide port and finally sprayed out from the drain port of the connecting pipe, directly onto the threaded area of ​​the bolt being cleaned. While the cleaning brush bristles physically remove dirt, the lubricating medium is directly and evenly sprayed onto the outer surface of the thread being cleaned, improving the cleaning effect. At the same time, the lubricating medium fully penetrates into the tiny gaps of the thread engagement. The lubricated bolt is easier to screw in smoothly and steadily during subsequent installation, improving the reliability of the bolt's reusability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the base plate and the top structure of the bracket of the present invention;

[0019] Figure 3 This is a schematic diagram of the outer structure of the fixed cylinder of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of the fixed cylinder of the present invention. Figure 1 ;

[0021] Figure 5 This is a schematic diagram of the internal structure of the rotating drum of the present invention;

[0022] Figure 6 This is a schematic diagram of the disassembled rotating cylinder structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the screwing shaft structure of the present invention;

[0024] Figure 8 This is a schematic diagram of the outer structure of the rotating cylinder of the present invention. Figure 1 ;

[0025] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point A;

[0026] Figure 10 This is a schematic diagram of the outer structure of the rotating cylinder of the present invention. Figure 2 ;

[0027] Figure 11 For the present invention Figure 10 Enlarged schematic diagram of the structure at point B;

[0028] Figure 12 This is a schematic diagram of the internal top structure of the fixed cylinder of the present invention;

[0029] Figure 13 This is a schematic diagram of the cleaning component structure of the present invention;

[0030] Figure 14 This is a schematic diagram of the internal structure of the fixed cylinder of the present invention. Figure 2 .

[0031] Figure label:

[0032] 1. Base plate; 2. Bracket; 3. Fixed cylinder; 31. Drain outlet; 4. Rotating drum; 41. Connecting ring; 42. Connecting block; 5. Turning shaft; 51. Actuating block; 6. Cleaning assembly; 61. First gear; 62. Second gear; 63. Rotating rod; 64. Cleaning roller; 65. Cleaning box; 66. Cleaning plate; 67. Inclined block; 7. Guide plate; 8. Lubrication assembly; 81. Sealing box; 82. Piston rod; 83. Moving ring; 84. Oil reservoir; 85. Connecting pipe. Detailed Implementation

[0033] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structure, features, and effects of the present invention. Example 1

[0034] Please see Figures 1 to 14This invention provides a technical solution: a battery box locking device for a battery swapping station with a vehicle body screw cleaning function, comprising a base plate 1 and a bracket 2 installed inside the base plate 1 via a drive linkage mechanism. Multiple circular mounting slots at the top of the bracket 2 each house a fixed cylinder 3. A rotating cylinder 4 is rotatably connected to the bottom of each circular mounting slot via a motor. The rotating cylinder 4 is rotatably mounted in the central cavity of the fixed cylinder 3 via a connecting ring 41. A connecting block 42 is installed at the bottom of the central cavity of the rotating cylinder 4. A turning shaft 5 is spring-loaded onto the top of the connecting block 42. Two actuating blocks 51 are symmetrically fixedly connected to the outside of the turning shaft 5. The two actuating blocks 51 slide in cooperation with two sliding holes on the outside of the rotating cylinder 4. A cleaning component 6 and a lubrication component 8 are provided between the fixed cylinder 3 and the rotating cylinder 4. The cleaning component 6 is used to clean the outside of the bolt, and the lubrication component 8 is used to lubricate the bolt. The slot at the top of the turning shaft 5 is used to mate with the bolt head on the vehicle chassis. When the battery box needs to be disassembled, the rotating cylinder 4 is driven to rotate by the motor. The rotation of the rotating cylinder 4 drives the turning shaft 5 to rotate synchronously. The top of the turning shaft 5 mates with the locking bolt head on the vehicle chassis. Its rotation causes the bolt to unscrew in the opposite direction to loosen the bolt. During the bolt unscrewing process, the turning shaft 5 moves elastically downward along the axis of the rotating cylinder 4, thereby gradually guiding the bolt that is gradually detached from the vehicle body into the internal cavity of the rotating cylinder 4 for cleaning and lubrication.

[0035] The cleaning assembly 6 includes a first gear 61, which is fixedly connected to the outside of the rotating drum 4. Two second gears 62 are symmetrically meshed with the first gear 61. A rotating rod 63 is fixedly connected to the top of each of the two second gears 62. A cleaning roller 64 is fixedly connected to the outer surface of the rotating rod 63. A cleaning brush is installed on the outer side of the cleaning roller 64. The rotating rod 63 is rotatably connected to an opening in the inner wall of the fixed cylinder 3 via a bearing. The cleaning roller 64 is located in a transverse through-groove in the upper section of the inner wall of the fixed cylinder 3. Two cleaning boxes 65 are symmetrically installed at the top of the fixed cylinder 3. Cleaning plates 66 are slidably connected inside each of the two cleaning boxes 65 via springs. An inclined block 67 is fixedly connected to the bottom of each of the two cleaning plates 66. When the bolts are still tightened to the vehicle chassis, the cleaning plates 66 contact the turning shaft 5. At this time, the two cleaning plates 66 are in a pre-compression state under the action of the springs. When the motor drives the rotating drum 4 to rotate... When the bolt is loosened, the turning shaft 5 moves downward synchronously with the bolt under the action of the spring. The bolt shank gradually enters the central cavity of the fixed cylinder 3 and first contacts the two cleaning plates 66. Due to the elastic sliding structure of the cleaning plates 66, the downward movement of the bolt causes the cleaning plates 66 to abut against the outside of the bolt. At the same time, the abutting end of the cleaning plates 66 scrapes the threaded area on the bolt surface, achieving initial cleaning of the gaps. As the rotating cylinder 4 rotates, it drives the first gear 61 fixed on its outside to rotate synchronously. The rotation of the first gear 61 causes the two rotating rods 63 to rotate synchronously, thereby driving the cleaning rollers 64 on the outside of the rotating rods 63 to rotate accordingly. The cleaning brushes on the outside of the cleaning rollers 64 are in close contact with the outer surface of the bolt, performing circumferential rotation cleaning to effectively remove the attachments on the outside of the bolt. If the bolt needs to be reinstalled, the turning shaft 5 guides the cleaning plates 66 back into the cleaning box 65 through the inclined block 67 when moving upward.

[0036] One end of the cleaning plate 66 elastically abuts against the outside of the bolt. The abutting ends of the two cleaning plates 66 are correspondingly set to the threaded gap area of ​​the bolt. They are used to clean the dirt in the gap during the bolt rotation. As the motor drives the rotating drum 4 to rotate the turning shaft 5, the bolt begins to turn counterclockwise and move downward. During this combined rotation and downward movement, the abutting end of the cleaning plate 66 always maintains elastic contact with the bolt gap area. The bolt gap area continuously scrapes the abutting end of the cleaning plate 66 to clean the deposits accumulated in the gap.

[0037] The cleaning plates 66 are arranged alternately up and down along the axial direction of the screwing shaft 5. The direction of the intersection of the two cleaning plates 66 is consistent with the direction of the bolt thread. The two cleaning plates 66 are used to adapt to the spiral downward trajectory formed by the bolt during the loosening process, so as to achieve orderly cleaning of the gaps while the bolt rotates and moves axially.

[0038] A guide plate 7 is rotatably connected to the outer side of the rotating drum 4. The guide plate 7 is installed at an inclination in the central cavity of the fixed drum 3. A drain port 31 is opened on the upper outer side of the fixed drum 3. One end of the guide plate 7 extends and is fixed at the drain port 31. Due to the inclination of the guide plate 7, a discharge channel is formed from the inside to the outside and from top to bottom. The clean material naturally slides to the top of the guide plate 7 under the action of gravity and slides along the inclined guide plate 7 under the action of gravity, and is finally discharged through the drain port 31. Example 2

[0039] Based on Example 1, please refer to Figures 1 to 14 The lubrication assembly 8 includes a sealing box 81, which is installed in an opening in the lower outer section of the fixed cylinder 3. A piston rod 82 is slidably connected to the inside of the sealing box 81 via a spring seal. A moving ring 83 is connected to the top of the piston rod 82 and slidably sleeved on the outside of the rotating cylinder 4. The actuating block 51 slides against the moving ring 83. The sealing box 81 is connected to an oil storage box 84 through an oil inlet at the bottom of its inner cavity. The oil storage box 84 is fixed to the outer wall of the sealing box 81, and a connecting pipe 85 is installed at the top of the oil storage box 84. In the initial state, the rotating shaft 5 is in the upper position, and the moving ring 83 is in a high position under the action of the spring. The piston rod 82 does not compress the lubricating medium inside the sealing box 81. The oil storage box 84 is connected to the sealing box 81 through the connecting pipe 85, and the inside of the sealing box 81 is filled with lubricating medium. WD-grade multi-functional lubricating and rust-preventing oil is selected. WD-grade multi-functional oil can dissolve oxides, remove moisture, and clean light dirt while lubricating, achieving simultaneous cleaning and lubrication and improving bolt reliability. When the motor drives the rotating drum 4 to rotate to loosen the bolt, the turning shaft 5 drives the bolt to move downward synchronously. The actuating block 51 fixed to the outside of the turning shaft 5 moves downward and contacts and pushes the moving ring 83 downward. The downward movement of the moving ring 83 drives the piston rod 82 fixed to it to move downward synchronously. The downward movement of the piston rod 82 compresses the internal cavity volume of the sealing box 81, causing the lubricating medium stored therein to be pressurized. The pressurized lubricating medium enters the oil reservoir 84 through the oil inlet at the lower section of the sealing box 81, and then is sprayed onto the threaded area of ​​the bolt surface through the connecting pipe 85 at the top of the oil reservoir 84, which facilitates cleaning and lubrication of the bolt.

[0040] The nozzle at the upper end of the connecting pipe 85 passes through the outer wall of the fixed cylinder 3 and extends into the gap area between the two cleaning rollers 64. It is used to spray lubricating medium to clean and lubricate the outer surface of the bolt. The lubricating medium flows into the connecting pipe 85 through the oil storage box 84. The nozzle at the upper end of the connecting pipe 85 passes through the outer wall of the fixed cylinder 3 and extends into the gap between the two cleaning rollers 64, directly facing the axis of the bolt. This allows the lubricating medium to be sprayed directly onto the surface of the bolt being brushed, enhancing the synergistic effect of cleaning. The cleaning brush loosens the dirt, and the lubricating medium then penetrates into the thread gaps, improving the cleaning effect while lubricating.

[0041] The working principle of the technical solution provided by this invention is as follows:

[0042] The battery box is locked to the vehicle by chassis bolts. The drive linkage mechanism drives the bracket 2 to move up and down. In the pre-disassembly state, the slot at the top of the turning shaft 5 aligns with the head of the locking bolt on the vehicle chassis, but no force is applied. At this time, the turning shaft 5 is in the upper position under the action of its own spring. The cleaning plate 66 contacts the outside of the turning shaft 5 and is in the pre-compression state under the action of its internal spring. The moving ring 83 of the lubrication component 8 is in the high position under the action of the spring. The piston rod 82 does not compress the lubricating medium in the sealing box 81. The lubricating medium is stationary. When the motor starts, it drives the rotating drum 4 to rotate around its axis. The rotation of the rotating drum 4 drives the turning shaft 5 to rotate synchronously. Its rotation causes the bolt to unscrew in the opposite direction. As the bolt gradually comes out of the mounting hole on the vehicle body, the turning shaft 5 moves elastically downward along the axis of the rotating drum 4 under the action of the spring, smoothly guiding the bolt into the central cavity of the fixed cylinder 3, preparing for subsequent automatic maintenance.

[0043] During the downward movement of the bolt, its threaded portion first contacts two symmetrically arranged cleaning plates 66. The cleaning plates 66 are pre-compressed by springs, and their abutting ends are arranged corresponding to the threaded area of ​​the bolt. The abutting ends of the cleaning plates 66 are staggered in the same direction as the bolt thread rotation to match the downward spiral trajectory of the bolt. In the compound motion of the bolt rotating and moving downward, the abutting ends of the cleaning plates 66 continuously scrape the bolt thread gaps to complete the initial cleaning of the gaps. At the same time as the rotating drum 4 rotates, the first gear 61 on the outside of the rotating drum 4 rotates synchronously with the rotating drum 4, driving the meshing second gear 62 to rotate in the opposite direction, thereby driving the rotating rod 63 and the cleaning roller 64 to rotate. The cleaning brush on the outside of the cleaning roller 64 closely adheres to the outside of the bolt to perform all-round circumferential brushing to remove contaminants attached to the thread, forming a two-stage cleaning system with the cleaning plates 66.

[0044] When the shaft 5 is turned downwards, the actuating block 51 on its outer side moves downwards and pushes the moving ring 83 downwards. The moving ring 83 drives the piston rod 82 to compress the lubricating medium in the sealing box 81. The pressurized lubricating medium enters the oil storage box 84 through the oil inlet and is then sprayed out through the connecting pipe 85. The nozzle at the upper end of the connecting pipe 85 passes through the outer wall of the fixed cylinder 3 and extends into the gap between the two cleaning rollers 64, directly facing the bolt axis. The lubricating medium is sprayed directly onto the surface of the bolt being cleaned, which plays a role in dissolving dirt, preventing rust, and lubricating. This improves the cleaning effect of the cleaning brush and allows the lubricating medium to fully penetrate into the tiny gaps of the thread engagement. The lubricated bolts are easier to screw in smoothly and steadily during subsequent installation, which improves the reliability of the bolts for repeated use. During the cleaning process, the dirt that falls off falls onto the inclined guide plate 7. One end of the guide plate 7 is connected to the drain port 31 on the outside of the fixed cylinder 3, forming a discharge channel from the inside to the outside and from high to low. The waste slides along the guide plate 7 under the action of gravity and is finally discharged through the drain port 31 to prevent internal accumulation.

[0045] After the bolt is fully unscrewed, it is stored in the cavity at the center of the rotating drum 4 and has been cleaned and lubricated. If the battery needs to be reinstalled, align the cleaned and lubricated bolt with the threaded hole in the vehicle chassis, and drive the bolt upward by turning the shaft 5. When the shaft 5 moves upward, the outer actuating block 51 is released from the pressure on the moving ring 83, and the piston rod 82 is reset under the action of its spring, preparing for the next operation. The outer side of the shaft 5 will contact the inclined block 67 at the bottom of the cleaning plate 66, pushing the cleaning plate 66 back into the cleaning box 65 to avoid interfering with the upward movement of the shaft 5.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A battery box locking device for a battery swapping station with a vehicle body screw cleaning function, comprising a base plate (1) and a bracket (2) installed inside the base plate (1) via a drive linkage mechanism, characterized in that: A fixed cylinder (3) is installed in each of the multiple circular mounting slots at the top of the bracket (2). A rotating cylinder (4) is connected to the bottom of the circular mounting slot via a motor. The rotating cylinder (4) is rotatably installed in the central cavity of the fixed cylinder (3) via a connecting ring (41). A connecting block (42) is installed at the bottom of the central cavity of the rotating cylinder (4). A turning shaft (5) is installed at the top of the connecting block (42) via a spring. Two actuating blocks (51) are symmetrically fixed to the outside of the turning shaft (5). The two actuating blocks (51) slide in cooperation with two sliding holes on the outside of the rotating cylinder (4). A cleaning component (6) and a lubrication component (8) are provided between the fixed cylinder (3) and the rotating cylinder (4). The cleaning component (6) is used for cleaning the outside of the bolt, and the lubrication component (8) is used for lubricating the bolt. The cleaning assembly (6) includes a first gear (61), which is fixedly connected to the outside of the rotating drum (4). The teeth of the first gear (61) are symmetrically meshed with two second gears (62). The tops of the two second gears (62) are fixedly connected with rotating rods (63). A cleaning roller (64) is fixedly connected to the outer surface of the rotating rod (63). A cleaning brush is installed on the outside of the cleaning roller (64). The rotating rod (63) is rotatably connected to the opening in the inner wall of the fixed cylinder (3) through a bearing. The cleaning roller (64) is set in the transverse through groove in the upper section of the inner wall of the fixed cylinder (3). Two cleaning boxes (65) are symmetrically installed at the top of the fixed cylinder (3). The cleaning plates (66) are slidably connected inside the two cleaning boxes (65) through springs. The bottom ends of the two cleaning plates (66) are fixedly connected with inclined blocks (67). The lubrication assembly (8) includes a sealing box (81), which is installed in the opening of the lower outer section of the fixed cylinder (3). Inside the sealing box (81), a piston rod (82) is slidably connected by a spring seal. A moving ring (83) is connected to the top of the piston rod (82). The moving ring (83) is slidably sleeved on the outside of the rotating cylinder (4). The actuating block (51) slides against the moving ring (83). The sealing box (81) is connected to an oil storage box (84) through an oil inlet at the bottom of the inner cavity. The oil storage box (84) is fixed to the outer wall of the sealing box (81). A connecting pipe (85) is installed at the top of the oil storage box (84).

2. The battery box locking device for a battery swapping station with a vehicle body screw cleaning function according to claim 1, characterized in that: One end of the two cleaning plates (66) is elastically abutted against the outside of the bolt, and the abutting ends of the two cleaning plates (66) are correspondingly set to the thread gap area of ​​the bolt, for cleaning the dirt in the gap during the bolt rotation.

3. The battery box locking device for a battery swapping station with a vehicle body screw cleaning function according to claim 2, characterized in that: The two cleaning plates (66) are arranged alternately up and down along the axial direction of the turning shaft (5), and the direction of the intersection of the two cleaning plates (66) is consistent with the direction of the bolt thread.

4. The battery box locking device for a battery swapping station with a vehicle body screw cleaning function according to claim 3, characterized in that: The outer side of the rotating cylinder (4) is rotatably connected to a guide plate (7). The guide plate (7) is installed obliquely in the central cavity of the fixed cylinder (3). The upper outer side of the fixed cylinder (3) is provided with a drain port (31). One end of the guide plate (7) extends and is fixed at the drain port (31).

5. The battery box locking device for a battery swapping station with a vehicle body screw cleaning function according to claim 4, characterized in that: The nozzle at the upper end of the connecting pipe (85) passes through the outer wall of the fixed cylinder (3) and extends to the gap area between the two cleaning rollers (64) to spray out lubricating medium to clean and lubricate the outer surface of the bolt.

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