A battery pack hoisting device, a battery pack transporting device, and a battery swap station

Abstract

The utility model provides a kind of battery pack hoist device, battery pack transport device and battery swap station, it is related to battery pack technical field, by being provided with first guide component between the multiple side walls of lifting component and the inside wall of fixed outer frame, at least one group of first guide component is provided on each side wall of lifting component, form horizontal constraint to lifting component from multiple directions, effectively limit the shaking or deviation of lifting component in horizontal direction, ensure the perpendicularity of lifting path, improve motion stability, simultaneously by the cooperation of multiple first pulley component and first slide, first pulley component can be rolled and moved on first slide, compared with traditional sliding friction guiding mode, the frictional resistance in lifting process is greatly reduced, the wear rate of component is reduced, the service life of equipment is prolonged, first pulley component and first track are respectively installed on the corresponding wall surface of lifting component and fixed outer frame, the processing and installation precision requirement of spare part is lower, assembly process is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of battery pack transportation technology, specifically to a battery pack lifting device, a battery pack transportation device, and a battery swapping station. Background Technology

[0002] In the field of battery pack transportation technology, battery pack lifting devices need to accurately lift and position battery packs to ensure safety and stability during transportation.

[0003] Currently, the guide structure in existing lifting devices typically uses a slotted slider and a slide rail for guiding and sliding. This requires high precision in the machining and installation of the slotted slider and the slide rail, resulting in high assembly difficulty and installation cost. Utility Model Content

[0004] The problem solved by this utility model is: how to conveniently install the alignment guide structure of the battery pack lifting device.

[0005] To address the aforementioned problems, this utility model provides a battery pack lifting device, a battery pack transport device, and a battery swapping station.

[0006] In a first aspect, a battery pack lifting device includes: Fixed outer frame, used for fixed installation on the truss; The lifting component is mounted within the fixed outer frame. A drive structure is used to drive the lifting component to move relative to the fixed outer frame; Multiple sets of first guide components are disposed between the outer peripheral wall of the lifting component and the inner side wall of the fixed outer frame. The multiple sets of first guide components are spaced apart along the circumference of the lifting component. The outer peripheral wall of the lifting component includes multiple side walls. At least one set of first guide components is disposed on each side wall of the lifting component so that the lifting component can move vertically relative to the fixed outer frame. The first guide component includes a first slide rail and a plurality of corresponding first pulley components. The plurality of first pulley components are arranged at intervals in the vertical direction. One of the first slide rail and the first pulley component is located on the outer peripheral wall of the lifting component, and the other of the first slide rail and the first pulley component is located on the inner side wall of the fixed outer frame. The first pulley component rolls in contact with the first slide rail so that the first pulley component can move on the first slide rail.

[0007] Optionally, a first groove is provided on one of the outer peripheral wall of the lifting component and the inner side wall of the fixed outer frame, and at least a portion of the first slide is embedded in the first groove.

[0008] Optionally, a second groove is provided on the other of the outer peripheral wall of the lifting component and the inner side wall of the fixed outer frame, and at least a portion of the first pulley component is embedded in the second groove.

[0009] Optionally, the first pulley component includes a first housing, a first rod, and a first pulley structure; wherein the first rod is disposed inside the first housing and its two ends abut against two opposite inner walls of the first housing, and the first pulley structure is sleeved on the first rod so that the first pulley structure can rotate along the axial direction of the first rod.

[0010] Optionally, the bottom of the second groove is provided with a plurality of mounting holes, and the surface of the first housing near the mounting holes is provided with threaded holes corresponding to the mounting holes.

[0011] Optionally, the side wall of the first housing is provided with an oiling hole that penetrates the corresponding side wall.

[0012] Optionally, the surface of the first housing near the assembly hole is provided with an annular groove, and a sealing structure is provided in the annular groove.

[0013] Optionally, the lifting component includes: a middle frame, which is lifted and lowered within the fixed outer frame; an inner lifting frame, which is lifted and lowered within the middle frame; and a transmission structure, which is connected to the middle frame and the inner lifting frame respectively. When the driving structure drives the middle frame to move relative to the fixed outer frame, the inner lifting frame is driven by the transmission structure to move in the same direction relative to the middle frame. The battery pack lifting device further includes multiple sets of second guide components, which are disposed between the outer peripheral wall of the inner lifting frame and the inner sidewall of the middle frame. The multiple sets of second guide components are spaced apart along the circumference of the inner lifting frame. The outer peripheral wall of the inner lifting frame includes multiple... Each side wall of the inner lifting frame is provided with at least one set of second guide components, so that the inner lifting frame can move vertically relative to the intermediate frame; wherein, the second guide component includes a second slide rail and a corresponding plurality of second pulley components, the plurality of second pulley components are arranged at intervals in the vertical direction, one of the second slide rail and the second pulley component is provided on the outer peripheral wall of the inner lifting frame, and the other of the second slide rail and the second pulley component is provided on the inner side wall of the intermediate frame, the second pulley component rolls in contact with the second slide rail so that the second pulley component can move on the second slide rail.

[0014] Secondly, a battery pack transport device includes a battery pack lifting device as described in any of the above descriptions.

[0015] Thirdly, a battery swapping station includes a battery pack transport device as described above.

[0016] The beneficial effects of this utility model are as follows: By setting first guide components between multiple side walls of the lifting component and the inner side wall of the fixed outer frame, and setting at least one set of first guide components on each side wall of the lifting component, the lifting component is horizontally constrained from multiple directions, effectively limiting the swaying or deviation of the lifting component in the horizontal direction, ensuring the verticality of the lifting path, and improving the stability of movement. At the same time, through the cooperation of multiple first pulley components and the first slide rail, the first pulley components can roll and move on the first slide rail. Compared with the traditional sliding friction guiding method, the frictional resistance during the lifting process is greatly reduced, energy loss is reduced, the wear rate of components is reduced, and the service life of the equipment is extended. The first pulley components and the first track are respectively installed on the corresponding wall surfaces of the lifting component and the fixed outer frame. The processing accuracy requirements of the parts are low during installation, the assembly process is simple and convenient, and the installation cost is reduced. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a battery pack lifting device in an embodiment of the present invention; Figure 2 This is another structural schematic diagram of the battery pack lifting device in this utility model embodiment; Figure 3 This is another structural schematic diagram of the battery pack lifting device in an embodiment of this utility model; Figure 4 This is another structural schematic diagram of the battery pack lifting device in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the first guide component of the battery pack lifting device in an embodiment of this utility model; Figure 6 This is a schematic diagram of a battery pack transport device in an embodiment of the present invention; Figure 7 This is a schematic diagram of a battery swapping station in one embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: Battery pack lifting device 10; gripping component 11; fixed outer frame 20; lifting component 30; first groove 31; second groove 32; threaded hole 33; intermediate frame 34; inner lifting frame 35; transmission structure 36; chain 37; rotating assembly 38; drive structure 40; servo motor 41; rack 42; first guide component 50; first slide rail 51; first pulley component 52; first housing 53; first rod 54; first pulley structure 55; oil filling hole 56; annular groove 57; second guide component 60; second slide rail 61; second pulley component 62; battery pack transport device 100; truss 110; walking structure 120; track 130; battery swapping station 200. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0020] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down. The positive direction of the Z-axis represents upward, and the negative direction represents downward. The plane containing the X-axis and Y-axis in the attached diagram represents the horizontal plane, and any direction on the horizontal plane is horizontal. It should also be noted that the aforementioned representations of the Z-axis, Y-axis, and X-axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0021] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0022] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] In the field of battery pack transportation technology, battery pack lifting devices require precise lifting and positioning of battery packs to ensure safety and stability during transportation. Currently, existing lifting devices typically use a slotted slider and slide rail combination for guiding and sliding. This requires high precision in the machining and installation of the slotted slider and slide rail, resulting in high assembly difficulty and installation costs.

[0024] To address the problems existing in the aforementioned related technologies, this utility model provides a battery pack lifting device 10, a battery pack transport device 100, and a battery swapping station 200.

[0025] Combination Figures 1 to 5 As shown, a battery pack lifting device 10 includes a fixed outer frame 20, a lifting component 30, a drive structure 40, and multiple sets of first guide components 50. The fixed outer frame 20 is fixedly installed on a truss 110. The lifting component 30 is lifted and lowered within the fixed outer frame 20. The drive structure 40 is used to drive the lifting component 30 to move relative to the fixed outer frame 20. Multiple sets of first guide components 50 are disposed between the outer peripheral wall of the lifting component 30 and the inner sidewall of the fixed outer frame 20. The multiple sets of first guide components 50 are spaced apart circumferentially along the lifting component 30. The outer peripheral wall of the lifting component 30 includes multiple sidewalls, and each sidewall of the lifting component 30 is provided with at least one... A set of first guide components 50 is provided to allow the lifting component 30 to move vertically relative to the fixed outer frame 20; wherein, the first guide component 50 includes a first slide rail 51 and a plurality of corresponding first pulley components 52, the plurality of first pulley components 52 are arranged at intervals in the vertical direction, one of the first slide rail 51 and the first pulley component 52 is provided on the outer peripheral wall of the lifting component 30, and the other of the first slide rail 51 and the first pulley component 52 is provided on the inner side wall of the fixed outer frame 20, and the first pulley component 52 rolls in contact with the first slide rail 51 so that the first pulley component 52 can move on the first slide rail 51.

[0026] By setting first guide components 50 between multiple side walls of the lifting component 30 and the inner side wall of the fixed outer frame 20, and setting at least one set of first guide components 50 on each side wall of the lifting component 30, the lifting component 30 is horizontally constrained from multiple directions, effectively limiting the swaying or deviation of the lifting component 30 in the horizontal direction, ensuring the verticality of the lifting path, and improving motion stability. At the same time, through the cooperation of multiple first pulley components 52 and the first slide rail 51, the first pulley components 52 can roll and move on the first slide rail 51. Compared with the traditional sliding friction guiding method, the frictional resistance during the lifting process is greatly reduced, energy loss is reduced, the wear rate of components is reduced, and the service life of the equipment is extended. The first pulley components 52 and the first track 130 are respectively installed on the corresponding wall surfaces of the lifting component 30 and the fixed outer frame 20. The processing accuracy requirements of the parts are low during installation, the assembly process is simple and convenient, and the installation cost is reduced.

[0027] Specifically, please refer to Figure 1 , Figure 2 , Figure 4The first slide rail 51 is disposed on the outer peripheral wall of the lifting component 30, and the first pulley component 52 is disposed on the inner side wall of the fixed outer frame 20; or, the first pulley component 52 is disposed on the outer peripheral wall of the lifting component 30, and the first slide rail 51 is disposed on the inner side wall of the fixed outer frame 20. For ease of description, the following description uses the example of the first slide rail 51 being disposed on the outer peripheral wall of the lifting component 30 and the first pulley component 52 being disposed on the inner side wall of the fixed outer frame 20.

[0028] Specifically, the material of the first slide rail 51 can be a wear-resistant metal, such as high-strength alloy steel or surface-hardened stainless steel, to ensure structural stability and smooth sliding under long-term use, while reducing the wear rate, extending the overall service life of the device, and maintaining constant accuracy in frequent reciprocating motion. The specific shape of the first slide rail 51 can be strip-shaped, etc., which is only an example and not a specific limitation.

[0029] Specifically, please refer to Figure 1 The drive structure 40 may include a servo motor 41 mounted on the outer wall of the fixed frame. A transmission gear is fixedly mounted on the output shaft of the servo motor 41. A rack 42 is fixedly mounted on the outer wall of the lifting component 30 corresponding to the transmission gear, and the transmission gear meshes with the rack. After the servo motor starts, the meshing transmission gear and rack drive the lifting component 30 to move vertically upwards and downwards. The transmission process is smooth and precise, with a fast response speed, and can achieve precise position control. Only the servo motor 41 and rack 42 are shown in the figure; the drive structure 40 is not the focus of this paper, and its specific structure and working principle will not be described in detail here.

[0030] Specifically, please refer to Figure 1 , Figure 3 The battery pack lifting device 10 also includes a gripping component 11 connected to the lifting component 30, which is used to clamp or release the battery pack.

[0031] In some embodiments, please refer to the following for details. Figure 4 A first groove 31 is provided on one of the outer peripheral wall of the lifting component 30 and the inner sidewall of the fixed outer frame 20, and at least a portion of the first slide rail 51 is embedded in the first groove 31. The first groove 31 on the outer peripheral wall of the lifting component 30 allows the first slide rail 51 to be at least partially embedded in it. The sidewall of the first groove 31 can limit the movement of the first slide rail 51, preventing it from shifting or falling off due to force during the guiding process, thus enhancing the stability of the first slide rail 51 installation. The structure of the first groove 31 can also conceal part of the volume of the first slide rail 51, reducing the overall space occupied by the guiding component and making the structure more compact.

[0032] In some embodiments, please refer to the following for details. Figure 4 A second groove 32 is provided on the outer peripheral wall of the lifting component 30 and the inner sidewall of the fixed outer frame 20, and at least a portion of the first pulley component 52 is embedded in the second groove 32. The second groove 32 on the inner sidewall of the fixed outer frame 20, corresponding to the mounting surface of the first pulley component 52, restricts the horizontal displacement of the first pulley component 52, ensuring a stable contact position with the first slide rail 51 and preventing the pulley from deviating from the slide rail due to vibration or impact, further improving guiding reliability. The second groove 32 also reduces the protruding height of the first pulley component 52, minimizing the risk of interference with other components.

[0033] In some embodiments, please refer to the following for details. Figure 5 The first pulley component 52 includes a first housing 53, a first rod 54, and a first pulley structure 55. The first rod 54 is disposed within the first housing 53, with its two ends abutting against opposite inner walls of the first housing 53. The first pulley structure 55 is fitted onto the first rod 54, allowing it to rotate axially along the first rod 54. The first housing 53 provides protection and a mounting carrier for the pulley structure, isolating it from external dust and impurities, thus extending its service life. The two ends of the first rod 54 abut against opposite inner walls of the first housing 53, forming a stable support shaft to ensure coaxiality during pulley structure rotation and prevent eccentric wear. The first pulley structure 55, fitted onto the rod and freely rotating, converts sliding friction into rolling friction, further reducing guiding resistance and making the movement of the lifting component 30 smoother, thus reducing drive energy consumption.

[0034] Specifically, the extension direction of the second groove 32 can be vertical, and the width of the second groove 32 can match the width of the first housing 53, so that the first pulley component 52 can be assembled in a suitable position within the second groove 32.

[0035] For details, please refer to [link / reference]. Figure 5 The width of the first pulley structure 55 is smaller than the width of the first slide rail 51. The first pulley structure 55 can float within the width direction of the first slide rail 51 to accommodate assembly errors between the slide rail and the pulley, avoid jamming or wear caused by the accumulation of errors, and improve the tolerance and operational stability of the guiding system.

[0036] In some embodiments, please refer to the following for details. Figure 5The bottom of the second groove 32 is provided with multiple mounting holes, and the surface of the first housing 53 near the mounting holes is provided with threaded holes 33 corresponding to the mounting holes. It is easy to understand that, although the mounting holes are not shown, the bottom of the second groove 32 has mounting holes, and the corresponding position of the first housing 53 has a threaded hole 33. By connecting the first pulley component 52 to the mounting surface through bolts or other fasteners passing through the mounting holes and threaded holes 33, it can be firmly fixed to the mounting surface, preventing it from loosening or falling off during operation. The threaded connection method facilitates disassembly and maintenance, reducing later maintenance costs.

[0037] In some embodiments, please refer to the following for details. Figure 5 The first housing 53 has a lubrication hole 56 that penetrates the corresponding side wall. The lubrication hole 56 that penetrates the side wall of the first housing 53 can conveniently inject lubricant into the first pulley structure 55, reduce rotational friction and component wear, maintain the flexible rotation performance of the pulley, extend the maintenance cycle, and increase the service life of the first pulley component 52.

[0038] In some embodiments, please refer to the following for details. Figure 5 The first housing 53 has an annular groove 57 on its surface near the assembly hole, and a sealing structure is provided within the annular groove 57. (The sealing structure is not shown in the drawing.) The annular groove 57 on the surface of the first housing 53 near the assembly hole, with its built-in sealing structure, such as a sealing ring, effectively prevents external dust, moisture, and other impurities from entering the first pulley component 52 through the gap between the assembly hole and the first housing 53. This protects the internal rotating structure from contamination, maintains its lubrication effect and rotational accuracy, and further extends the component's service life.

[0039] In some embodiments, please refer to the following for details. Figures 1 to 4The lifting component 30 includes a middle frame 34, an inner lifting frame 35, and a transmission structure 36. The middle frame 34 is lifted and lowered within the fixed outer frame 20; the inner lifting frame 35 is lifted and lowered within the middle frame 34; the transmission structure 36 is connected to both the middle frame 34 and the inner lifting frame 35. When the driving structure 40 drives the middle frame 34 to move relative to the fixed outer frame 20, the inner lifting frame 35 is driven by the transmission structure 36 to move in the same direction relative to the middle frame 34. The battery pack lifting device 10 also includes multiple sets of second guide components 60. The second guide components 60 are disposed between the outer peripheral wall of the inner lifting frame 35 and the inner sidewall of the middle frame 34. The multiple sets of second guide components 60 are spaced apart circumferentially along the inner lifting frame 35. The outer peripheral wall of the inner lifting frame 35 includes multiple side walls. At least one set of second guide members 60 is provided on each side wall of the inner lifting frame 35 to allow the inner lifting frame 35 to move vertically relative to the intermediate frame 34. The second guide member 60 includes a second slide rail 61 and a corresponding plurality of second pulley members 62. The plurality of second pulley members 62 are arranged at intervals in the vertical direction. One of the second slide rail 61 and the second pulley member 62 is provided on the outer peripheral wall of the inner lifting frame 35, and the other of the second slide rail 61 and the second pulley member 62 is provided on the inner side wall of the intermediate frame 34. The second pulley member 62 rolls in contact with the second slide rail 61 so that the second pulley member 62 can move on the second slide rail 61.

[0040] The middle frame 34 and the inner lifting frame 35 form a nested lifting structure. The transmission structure 36 enables the two to move in the same direction, which can achieve a longer lifting stroke within the limited height of the fixed outer frame 20, meet the lifting height requirements of the battery pack in different scenarios, and improve the applicability of the device. The transmission structure 36 synchronously transmits the movement of the middle frame 34 to the inner lifting frame 35 to achieve double-layer linkage. While increasing the stroke, there is no need to add an additional drive structure 40, which simplifies the equipment layout and reduces energy consumption.

[0041] The second guide component 60 is similar in principle to the first guide component 50. It is located between the inner lifting frame 35 and the intermediate frame 34, and is distributed circumferentially along the inner lifting frame 35 with at least one set on each side wall. It forms a horizontal constraint on the inner lifting frame 35, ensuring the vertical movement accuracy of the inner lifting frame 35 relative to the intermediate frame 34 and preventing jamming or displacement of the double-layer structure during linkage. The cooperation between the second slide rail 61 and multiple second pulley components 62 reduces the movement resistance of the inner lifting frame 35 through rolling friction, ensuring the smooth operation of the double-layer lifting structure, while reducing the installation accuracy requirements and facilitating assembly and maintenance.

[0042] For details, please refer to [link / reference]. Figure 1The transmission structure 36 includes a chain 37 and a rotating assembly 38. The rotating assembly 38 includes a fixed shaft fixed to the upper and lower ends of the middle frame 34 and a sprocket rotatably mounted on the fixed shaft. The chain 37 and the sprocket are in a transmission cooperation. One end of the chain 37 located on the outer side of the intermediate frame 34 is fixedly connected to the fixed outer frame 20 by a first fastener, and the other end of the chain 37 located on the inner side of the intermediate frame 34 is fixedly connected to the inner lifting frame 35 by a second fastener. When the intermediate frame 34 moves downward relative to the fixed outer frame 20 under the drive of the drive structure 40, since the fixed outer frame 20 is fixedly mounted on the truss, the outer end of the chain 37 remains stationary. The rotating component 38 is fixed at both ends of the intermediate frame and moves downward synchronously with the intermediate frame. The sprocket rotates under the traction of the chain. At this time, the inner end of the chain moves downward driven by the inner lifting frame, causing the inner lifting frame 35 to descend synchronously, realizing synchronous transmission between the inner lifting frame and the intermediate frame. The inner lifting frame 35 is driven by the transmission structure 36 to move in the same direction relative to the intermediate frame 34, realizing the linkage extension and retraction of the inner lifting frame and the intermediate frame. Specifically, a bearing is provided between the sprocket and the fixed shaft. The inner ring of the bearing is fixedly connected to the side wall of the fixed shaft, and the outer ring of the bearing is fixedly connected to the inner wall of the sprocket. The figure only shows part of the chain 37 and the rotating component 38. The transmission structure 36 is not the focus of this application and will not be described in detail here.

[0043] Combination Figure 6 As shown, a battery pack transport device 100 includes a battery pack lifting device 10 as described in any of the above descriptions. For the specific structure of the battery pack lifting device 10, please refer to any of the above-described embodiments of the battery pack lifting device 10 and the accompanying drawings. Figures 1 to 5 This will not be elaborated upon here.

[0044] For details, please refer to [link / reference]. Figure 6 The battery pack transport device 100 also includes a truss 110, a traveling structure 120, and a track 130. The battery pack lifting device 10 is fixedly connected to the truss 110, and the traveling structure 120 drives the truss 110 to move along the preset track 130 to realize the transfer of the battery pack between different workstations.

[0045] Combination Figure 7 As shown, a battery swapping station 200 includes a battery pack transport device 100 as described above. For the specific structure of the battery pack transport device 100, please refer to any of the embodiments of the battery pack transport device 100 described above and their accompanying drawings. Figure 6 The specific location of the battery pack transport device 100 and its arrangement in the battery swapping station 200 can be flexibly adjusted according to the actual working conditions, and will not be elaborated here.

[0046] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A battery pack lifting device, characterized in that, include: Fixed outer frame (20) is used for fixed installation on the truss; The lifting component (30) is lifted and lowered within the fixed outer frame (20); A drive structure (40) is used to drive the lifting component (30) to move relative to the fixed outer frame (20); Multiple sets of first guide components (50) are disposed between the outer peripheral wall of the lifting component (30) and the inner side wall of the fixed outer frame (20). The multiple sets of first guide components (50) are arranged at intervals along the circumference of the lifting component (30). The outer peripheral wall of the lifting component (30) includes multiple side walls. At least one set of first guide components (50) is provided on each side wall of the lifting component (30) so that the lifting component (30) can move vertically relative to the fixed outer frame (20). The first guide component (50) includes a first slide rail (51) and a plurality of corresponding first pulley components (52). The plurality of first pulley components (52) are arranged at intervals in the vertical direction. One of the first slide rail (51) and the first pulley component (52) is disposed on the outer peripheral wall of the lifting component (30), and the other of the first slide rail (51) and the first pulley component (52) is disposed on the inner side wall of the fixed outer frame (20). The first pulley component (52) rolls in contact with the first slide rail (51) so that the first pulley component (52) can move on the first slide rail (51).

2. The battery pack lifting device according to claim 1, characterized in that, A first groove (31) is provided on one of the outer peripheral wall of the lifting component (30) and the inner side wall of the fixed outer frame (20), and at least a portion of the first slide rail (51) is embedded in the first groove (31).

3. The battery pack lifting device according to claim 2, characterized in that, A second groove (32) is provided on the other of the outer peripheral wall of the lifting component (30) and the inner side wall of the fixed outer frame (20), and at least a portion of the first pulley component (52) is embedded in the second groove (32).

4. The battery pack lifting device according to claim 3, characterized in that, The first pulley component (52) includes a first housing (53), a first rod (54), and a first pulley structure (55); The first rod (54) is disposed inside the first housing (53) and the two ends of the first rod (54) respectively abut against the two opposite inner walls of the first housing (53). The first pulley structure (55) is sleeved on the first rod (54) so ​​that the first pulley structure (55) can rotate along the axial direction of the first rod (54).

5. The battery pack lifting device according to claim 4, characterized in that, The bottom of the second groove (32) is provided with a plurality of mounting holes, and the surface of the first housing (53) near the mounting holes is provided with threaded holes (33) corresponding to the mounting holes.

6. The battery pack lifting device according to claim 4, characterized in that, The first housing (53) has a refueling hole (56) that penetrates the corresponding side wall.

7. The battery pack lifting device according to claim 5, characterized in that, The first housing (53) has an annular groove (57) on the surface near the assembly hole, and a sealing structure is provided in the annular groove (57).

8. The battery pack lifting device according to any one of claims 1 to 7, characterized in that, The lifting component (30) includes: The middle frame (34) is raised and lowered within the fixed outer frame (20); The inner lifting frame (35) is lifted and lowered within the middle frame (34); The transmission structure (36) is connected to the middle frame (34) and the inner lifting frame (35) respectively. When the driving structure (40) drives the middle frame (34) to move relative to the fixed outer frame (20), the inner lifting frame (35) is driven by the transmission structure (36) to move in the same direction relative to the middle frame (34). The battery pack lifting device (10) further includes multiple sets of second guide components (60). The second guide components (60) are disposed between the outer peripheral wall of the inner lifting frame (35) and the inner side wall of the intermediate frame (34). The multiple sets of second guide components (60) are arranged at intervals along the circumference of the inner lifting frame (35). The outer peripheral wall of the inner lifting frame (35) includes multiple side walls. At least one set of second guide components (60) is provided on each side wall of the inner lifting frame (35) so that the inner lifting frame (35) can move vertically relative to the intermediate frame (34). The second guide component (60) includes a second slide rail (61) and a plurality of corresponding second pulley components (62). The plurality of second pulley components (62) are arranged at intervals in the vertical direction. One of the second slide rail (61) and the second pulley component (62) is located on the outer peripheral wall of the inner lifting frame (35), and the other of the second slide rail (61) and the second pulley component (62) is located on the inner side wall of the intermediate frame (34). The second pulley component (62) rolls in contact with the second slide rail (61) so that the second pulley component (62) can move on the second slide rail (61).

9. A battery pack transport device, characterized in that, Includes the battery pack lifting device as described in any one of claims 1 to 8.

10. A battery swapping station, characterized in that, Includes the battery pack transport device as described in claim 9.

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