Charging module and charging system
By using staggered handles and guide rails, the problem of difficulty in applying force in the vertical stacking direction of traditional charging modules is solved, achieving efficient installation and safe operation of the charging modules.
Patent Information
- Application Number
- CN202520268788.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-19
AI Technical Summary
The handle design of traditional charging modules makes it difficult to apply force conveniently when the stacking direction is perpendicular to the height of the cabinet, resulting in time-consuming and laborious installation and potential safety hazards.
The design incorporates staggered handles, with the gripping section extending along the first direction and spaced out in the second direction. Combined with the guide rail structure, this allows operators to easily install and remove the charging module by gripping it with both hands.
It improves the installation efficiency of the charging module, reduces the risk of damage to the cabinet frame, enhances safety, and conforms to ergonomic principles.
Smart Images
Figure CN223583858U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of charging systems, in particular to a charging module and a charging system. BACKGROUND
[0002] The charging module on the market is an electric energy converter for converting alternating current into direct current. According to the power of the charging pile, a certain number of modules are matched and fixed in the cabinet inside the charging pile. Multiple charging modules are generally stacked in the cabinet. The stacking direction of the charging module is often coincident with or perpendicular to the height direction of the cabinet.
[0003] Two handles are often arranged at intervals on the traditional charging module to realize the pushing or taking out of the charging module inside the cabinet. As shown in FIG. 1, the interval direction of the two handles is perpendicular to the stacking direction of the charging module, and the extension direction of the gripping part of the handle is the same as the stacking direction of the charging module. Figure 1
[0004] In the application that the stacking direction of the charging module is perpendicular to the height direction of the cabinet, taking the case that the height direction of the cabinet is the same as the direction of gravity as an example, the two handles are arranged in the height direction of the cabinet, and the gripping part of the handle extends along the horizontal direction. At this time, the gripping handle does not conform to the principle of human engineering, and it is not convenient to apply force. In the process of pushing or taking out the charging module, it is easy to cause damage to the cabinet frame, and it is also easy to cause harm to the on-site construction personnel, which is time-consuming, laborious and poor in safety. CONTENT OF THE UTILITY MODEL
[0005] The main purpose of the present application is to provide a charging module and a charging system, which aims to solve the problem that the handle of the charging module is not convenient to apply force in the application that the stacking direction of the charging module is perpendicular to the height direction of the cabinet.
[0006] To achieve the above-mentioned purpose, the present application provides a charging module, which comprises a main body part and two handles. The main body part has a first side surface and a second side surface arranged oppositely. The two handles are arranged on the side of the first side surface away from the second side surface. The two handles each have a gripping section, and the gripping section extends along a first direction. In the first direction, the two handles are arranged staggered. In a second direction, the two handles are arranged at intervals. The second direction is parallel to the first side surface and intersects with the first direction.
[0007] Optionally, the charging module further comprises an inlet and outlet terminal. The inlet and outlet terminal is arranged on the side of the first side surface away from the second side surface. In the second direction, the inlet and outlet terminal is located between the two handles.
[0008] Optionally, the inlet and outlet terminal has two and is arranged at intervals in the first direction.
[0009] Optionally, the protrusion height of the liquid inlet and outlet terminal on the first side is less than the protrusion height of the handle on the first side.
[0010] Optionally, two ends of the two handles in the first direction are a first end and a second end respectively; in the first direction, the liquid inlet and outlet terminal is located between the first end and the second end.
[0011] Optionally, the two handles are diagonally arranged at the first side.
[0012] Optionally, the charging module further comprises an auxiliary handle, the auxiliary handle is arranged on the side of the second side away from the first side, and a gripping section of the auxiliary handle extends along the second direction.
[0013] Optionally, the two handles are integrally formed with the main body.
[0014] In addition, to achieve the above-mentioned purpose, the embodiment of the present application further provides a charging system, characterized in that it comprises a cabinet frame and a plurality of charging modules as described above, and the plurality of charging modules are arranged in a stack in a preset direction in the cabinet frame; wherein the direction opposite to the first side and the second side is a third direction, and the charging module has a degree of freedom of sliding along the third direction.
[0015] Optionally, the charging system further comprises a plurality of guide rail sets, and the plurality of guide rail sets correspond one-to-one to the plurality of charging modules and are fixed in the cabinet frame; wherein the guide rail set comprises two guide rails, and the two guide rails both extend along the third direction and are located on opposite sides of the corresponding charging module; the charging module is in sliding cooperation with the two corresponding guide rails.
[0016] The charging module provided by the embodiment of the present application has two handles arranged staggered in the first direction and arranged spaced apart in the second direction, and the gripping section of the handle extends along the first direction. When a plurality of charging modules are arranged in a stack in the second direction and the second direction is perpendicular to the height direction of the cabinet frame, an operator can pull out or push into the cabinet frame by holding the gripping sections of the two handles with both hands, and the two handles arranged staggered are more convenient for gripping and exerting force, so that the charging module is convenient to install and disassemble, the working efficiency is high, the cabinet frame is not easy to be damaged, the safety is good, and the handle form conforms to the ergonomics. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the prior art and the present application, the drawings needed in the description of the prior art and the embodiment of the present application will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.
[0018] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the present application. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes of the present application, should still fall within the scope of the disclosed technology.
[0019] Figure 1 The present application provides a handle position schematic diagram of a charging module in the prior art;
[0020] Figure 2 The present application provides a schematic diagram of the overall structure of a charging module;
[0021] Figure 3 The present application provides a schematic diagram of the overall structure of a charging module; Figure 2 The present application provides a schematic diagram of the overall structure of a charging module;
[0022] Figure 4 The present application provides a schematic diagram of the overall structure of a charging module;
[0023] Figure 5 The present application provides a schematic diagram of the overall structure of a charging module;
[0024] Figure 6 The present application provides a schematic diagram of the overall structure of a charging module;
[0025] Figure 7 The present application provides a schematic diagram of the overall structure of a charging system.
[0026] In the figure: 1, main body; 11, inlet and outlet terminal; 12, auxiliary handle; 2, handle; 3, cabinet frame; 31, guide rail.
[0027] The implementation, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.
[0029] It should be noted that all the directional indications (such as up, down, left, right, front, back, and the like) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.
[0030] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0031] In addition, if the present application embodiments involve "first", "second" and the like, the "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.
[0032] The present application will be described in detail below with reference to the drawings and embodiments.
[0033] Figure 1 The present application is a schematic diagram of the handle position of the charging module in the prior art; Figure 2 The present application is a schematic diagram of the overall structure of the charging module; Figure 3 The present application is a schematic diagram of the overall structure of the charging module; Figure 2 The present application is a schematic diagram of the overall structure of the charging module; Figure 4A top view structural schematic diagram of a charging module provided by an embodiment of the present application; Figure 5 A front view structural schematic diagram of a charging module provided by an embodiment of the present application; Figure 6 A side view structural schematic diagram of a charging module provided by an embodiment of the present application; Figure 7 A whole structural schematic diagram of a charging system provided by an embodiment of the present application.
[0034] Wherein, Figure 1 A handle position schematic diagram of a charging module in the prior art, Figure 1 It can be clearly seen from the above that, on the same charging module, the two handles are arranged side by side in the up-down direction, and the gripping sections of the handles are arranged horizontally, so that when the charging module is pulled out or pushed in, it is difficult to grip the two handles arranged side by side in the up-down direction, and when the charging module is located outside the cabinet frame, the force position for moving the charging module is on the handles, and the self-weight of the charging module is large, so that the side of the charging module far from the handle is easy to tilt downward, and it is difficult to apply force to the two handles arranged side by side in the up-down direction to resist the tilting of the charging module, so that when the charging module is installed or disassembled, the charging module is easy to collide with the cabinet frame or the operator, and the safety is poor.
[0035] With reference to Figures 2 to 7 , the present application provides a charging module, which can include a main body part 1 and two handles 2, the main body part 1 has a first side and a second side arranged oppositely; the two handles 2 are arranged on the side of the first side away from the second side, and the two handles 2 each have a gripping section, and the gripping sections each extend along a first direction; wherein, in the first direction, the two handles 2 are arranged staggered; in a second direction, the two handles 2 are arranged spaced apart, and the second direction is parallel to the first side and intersects with the first direction.
[0036] The charging module provided by the present application has two handles 2 arranged staggered in the first direction and arranged spaced apart in the second direction, and the gripping sections of the handles 2 extend along the first direction, so that when a plurality of charging modules are arranged stacked in the second direction and the second direction is perpendicular to the height direction of the cabinet frame 3, the operator holds the gripping sections of the two handles 2 with both hands, and the charging module can be pulled out or pushed into the cabinet frame 3 through the handles 2; the two handles 2 arranged staggered are more conducive to gripping and applying force, so that the charging module is convenient to install and disassemble, the work efficiency is high, and the cabinet frame 3 is not easy to be damaged, and the safety is good; at the same time, the form of the handle 2 conforms to the ergonomics.
[0037] As shown in Figure 2 , the first direction in the present application is the X direction, the second direction is the Y direction, and the third direction is the Z direction, Figure 7The diagram shows that the above-mentioned multiple charging modules are stacked in the second direction Y, and the second direction Y is perpendicular to the height direction of the cabinet frame 3. The height direction of the cabinet frame 3 is usually the same as the direction of gravity when in use. The following explanation will take the first direction X as the same as the direction of gravity as an example. The second direction Y, the first direction X, and the third direction Z are all perpendicular to each other.
[0038] Among them, such as Figure 2 As shown, the two handles 2 are staggered in the first direction X, meaning that the same part of the two handles 2 is at a different height on the first side in the first direction X; the two handles 2 are spaced apart in the second direction Y, meaning that the same part of the two handles 2 is spaced apart in the second direction Y.
[0039] In the embodiments of this application, such as Figure 2 As shown, the charging module as a whole can have a rectangular structure, that is, the main body 1 has a rectangular structure. The second direction Y can be understood as the thickness direction of the charging module. Multiple charging modules can be stacked in their own thickness direction. The two handles 2 on the charging module are positioned one above the other, as shown... Figure 7 As shown, when multiple charging modules are stacked in the second direction Y, there is a large gap between adjacent handles 2 located above or below. Thus, when multiple charging modules are stacked, the operator can easily hold the handle 2 without being disturbed by adjacent handles 2.
[0040] It should be noted that, in this application, the gripping section of handle 2 refers to the section where the operator's hand contacts handle 2 after the operator grips it tightly; the extension direction of the gripping section of handle 2 is to illustrate the operator's gripping direction, for example, as... Figure 1 As shown, Figure 1 The gripping section of the middle handle extends laterally, requiring the operator to grip the handle laterally, which makes it inconvenient to apply force to the charging module; for example Figure 2 As shown, Figure 2 The gripping section of the handle 2 extends along the first direction X, which can also be understood as a longitudinal extension. At this time, the operator needs to grip the handle 2 longitudinally with their hand to apply force on one side of the charging module and resist the tilt of the charging module.
[0041] It should be understood that, with Figure 2 The shape of the handle 2 is described below. The handle 2 includes two connecting sections and one gripping section. The two connecting sections are connected to the main body 1. The two ends of the gripping section are respectively connected to the ends of the two connecting sections away from the main body 1, thus forming the handle 2 in this application.
[0042] like Figure 2As shown, the overall shape of the handle 2 is trapezoidal, at this time the extension direction of the gripping section of the handle 2 is the same as the first direction X, which is convenient for the operator to exert force; of course, the overall handle 2 can be arc-shaped structure, that is, the two connecting sections and the gripping section are arc-shaped as a whole, at this time the operator also needs to longitudinally grip the arc-shaped handle, which is convenient for exerting force, but the arc-shaped handle is easy to cause the operator's hand to slide between the arc-shaped handle and the main body 1. The angle between the main body 1, which causes the operator to be injured; of course, a friction pad can also be added to the arc-shaped handle to prevent relative sliding between the operator's hand and the arc-shaped handle. In summary, the trapezoidal handle 2 in the present application is the preferred scheme, of course, the handle 2 can also be other shapes, which are not limited here, as long as the operator needs to longitudinally grip the handle 2 when gripping the handle 2, which is convenient for exerting force.
[0043] In the exemplary embodiment, both handles 2 are integrally formed with the main body 1; the handle 2 and the main body 1 are integrally formed by die casting process, which is lower in cost and greater in strength.
[0044] Reference Figure 2 and Figure 5 In the exemplary embodiment, the charging module can also include an inlet and outlet liquid terminal 11, which is arranged on the first side away from the second side; wherein, in the second direction Y, the inlet and outlet liquid terminal 11 is located between the two handles 2. In the exemplary embodiment, the inlet and outlet liquid terminal 11 has two and is arranged in the first direction X.
[0045] Specifically, as Figure 2 and Figure 5 shown, in the second direction Y, both inlet and outlet liquid terminals 11 are located between the two handles 2, one of which is used for liquid inlet and the other for liquid outlet; the two inlet and outlet liquid terminals 11 are arranged in the first direction X, so that when the first direction X is the same as the direction of gravity, the two inlet and outlet liquid terminals 11 are convenient for liquid inlet and outlet.
[0046] Reference Figure 4 In the exemplary embodiment, the protrusion height of the inlet and outlet liquid terminal 11 on the first side is less than the protrusion height of the handle 2 on the first side.
[0047] Among them, as Figure 4 shown, the protrusion height of the inlet and outlet liquid terminal 11 on the first side is less than the protrusion height of the handle 2 on the first side, so that the handle 2 can protect the inlet and outlet liquid terminal 11 to a certain extent in the third direction Z, for example, the handle 2 can prevent the article from impacting the inlet and outlet liquid terminal 11 in the third direction Z to a certain extent.
[0048] Reference Figure 6In the example embodiment, the two handles 2 have a first end and a second end at two opposite ends in the first direction X; in the first direction X, the liquid inlet and outlet terminal 11 is located between the first end and the second end.
[0049] As shown in FIG. 1, in the first direction X, the two liquid inlet and outlet terminals 11 are both located between the first end and the second end, so that the handle 2 can protect the liquid inlet and outlet terminal 11 to a certain extent in the first direction X, for example, the handle 2 can prevent the article from colliding with the liquid inlet and outlet terminal 11 in the first direction X to a certain extent. Figure 6 As shown in FIG. 1, in the example embodiment, the two handles 2 are diagonally arranged at the first side.
[0050] Figure 5 In the example embodiment, the first side is generally rectangular, and the two handles 2 are located at opposite corners of the first side, so that the two handles 2 can effectively avoid the devices mounted on the first side, such as the liquid inlet and outlet terminal 11, the operation button, and the like. Figure 6 Further, the two handles 2 are located at opposite corners of the first side, so that when the operator holds the two handles 2 and exerts force, it is more convenient to maintain the stability of the charging module in the first direction X or the second direction Y.
[0051] As shown in FIG. 1, in the example embodiment, the charging module can further include an auxiliary handle 12, the auxiliary handle 12 is arranged on the side of the second side away from the first side, and the gripping section of the auxiliary handle 12 extends along the second direction Y.
[0052] Before the charging module is mounted on the cabinet frame 3 and after the charging module is dismounted on the cabinet frame 3, the charging module needs to be transported, and when transporting, the operator can hold one handle 2 with one hand to lift one side of the main body 1, and hold the auxiliary handle 12 with the other hand to lift the other side of the main body 1, so that the first side and the second side of the main body 1 exert force together, facilitating the transportation of the charging module.
[0053] Figure 3 Further, the gripping section of the auxiliary handle 12 extends along the second direction Y, so that the operator can hold the auxiliary handle 12 transversely, which is more convenient for lifting the main body 1 along the first direction X.
[0054] In addition, as shown in FIG. 1, the auxiliary handle 12 can be arranged at the upper edge of the second side, so that when transporting the charging module, the operator can hold the handle 2 located at the upper side with one hand and hold the auxiliary handle 12 with the other hand to drive the charging module to be transported, and the force exertion position is located at the upper side of the main body 1, facilitating the lifting of the main body 1.
[0055] Further, the gripping section of the auxiliary handle 12 extends along the second direction Y, so that the operator can hold the auxiliary handle 12 transversely, which is more convenient for lifting the main body 1 along the first direction X.
[0056] In addition, as shown in FIG. 1, the auxiliary handle 12 can be arranged at the upper edge of the second side, so that when transporting the charging module, the operator can hold the handle 2 located at the upper side with one hand and hold the auxiliary handle 12 with the other hand to drive the charging module to be transported, and the force exertion position is located at the upper side of the main body 1, facilitating the lifting of the main body 1. Figure 3 Further, the gripping section of the auxiliary handle 12 extends along the second direction Y, so that the operator can hold the auxiliary handle 12 transversely, which is more convenient for lifting the main body 1 along the first direction X.
[0057] It should be understood that the second side of the main body 1 is provided with multiple connection ports away from the first side, and the space is limited, so the auxiliary handle 12 can be provided as an embedded structure rather than a gripping structure, as shown in Figure 3 The auxiliary handle 12 is a protruding part provided on the second side away from the first side, and a groove is formed below the protruding part. When the main body 1 needs to be lifted by the auxiliary handle 12, the fingers are inserted into the groove and upward force is applied.
[0058] Of course, the auxiliary handle 12 and the main body 1 also adopt an integrated die casting process, which is lower in cost and greater in strength.
[0059] Reference Figure 7 On the basis of the above embodiment, the application further provides a charging system, which can include a cabinet frame 3 and a plurality of charging modules as described above, and the plurality of charging modules are stacked in the preset direction in the cabinet frame 3; wherein the direction opposite to the first side and the second side is the third direction Z, and the charging module has the freedom of sliding along the third direction Z.
[0060] Specifically, as shown in Figure 7 The charging system can include a cabinet frame 3, and a plurality of charging modules are stacked in the cabinet frame 3. The height direction of the cabinet frame 3 is the same as the first direction X, that is, the height direction of the cabinet frame 3 can be the same as the direction of gravity. In the preferred embodiment, the preset direction is the second direction Y, so that the operator can pull out or push into the cabinet frame 3 along the third direction Z by the handle 2, and it is convenient to apply force to the charging module by the handle.
[0061] It should be understood that the charging system can also include a cabinet shell, and the cabinet frame 3 is arranged in the cabinet shell. A cabinet door is arranged on the cabinet shell, and the cabinet door is located on the side away from the second side of the first side, so that the handle 2 can be gripped by opening the cabinet door, and the maintenance and replacement of the charging module can be performed.
[0062] The gripping section of the handle 2 extends along the first direction X, and the two handles 2 are arranged in a staggered manner, which is more convenient for the installation and disassembly of the charging module and more convenient for use.
[0063] Reference Figure 7 In the exemplary embodiment, the charging system can also include a plurality of guide rail groups, and the plurality of guide rail groups correspond to the plurality of charging modules one by one and are fixed in the cabinet frame 3; wherein the guide rail group can include two guide rails 31, and the two guide rails 31 extend along the third direction Z and are located on the opposite sides of the corresponding charging module; the charging module is in sliding cooperation with the corresponding two guide rails 31.
[0064] Specifically, two guide rails 31 can be arranged on the opposite sides of the charging module in the second direction Y, so as to facilitate the sliding of the charging module out of or into the cabinet frame 3. Figure 7 As shown in the preferred embodiment, two guide rails 31 can be arranged on the opposite sides of the main body 1 of the charging module in the first direction X, so that when the charging module is arranged in the second direction Y, the guide rails 31 do not occupy the space of the charging module in the second direction Y, more charging modules can be arranged, or the volume of the cabinet frame 3 can be reduced. The guide rails 31 are fixed in the cabinet frame 3, and the operator can exert force at the handle 2 to drive the main body 1 to slide out of or into the cabinet frame 3 in the third direction Z.
[0065] It should be understood that when the main body 1 slides out of the cabinet frame 3, the first side of the main body 1 is subjected to force by the operator, and the second side is inclined downward due to gravity. Through the above-mentioned two handles 2 arranged in a staggered manner, the operator can easily exert force on the handle 2 at the first side to maintain the balance of the main body 1.
[0066] Similarly, when the charging module is carried and the second side of the main body 1 needs to be inserted into the cabinet frame 3, through the above-mentioned two handles 2 arranged in a staggered manner, the operator can easily exert force on the handle 2 at the first side to maintain the balance of the main body 1, and insert the second side of the main body 1 into the cabinet frame 3, preventing the charging module from colliding with the cabinet frame 3.
[0067] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.
Claims
1. A charging module, characterized by, The charging module comprises: a main body (1) having a first side and a second side arranged oppositely; two handles (2) each arranged on a side of the first side away from the second side, the two handles (2) each having a gripping section extending in a first direction; wherein, in the first direction, the two handles (2) are staggered; in a second direction, the two handles (2) are spaced apart, the second direction being parallel to the first side and intersecting the first direction.
2. The charging module of claim 1, wherein, The charging module further comprises: an inlet and outlet terminal (11) arranged on a side of the first side away from the second side; wherein, in the second direction, the inlet and outlet terminal (11) is located between the two handles (2).
3. The charging module of claim 2, wherein, The inlet and outlet terminal (11) has two and is spaced apart in the first direction.
4. The charging module of claim 2, wherein, The protrusion height of the inlet and outlet terminal (11) on the first side is less than the protrusion height of the handle (2) on the first side.
5. The charging module of claim 3, wherein, The two handles (2) have a first end and a second end at both ends in the first direction, respectively; in the first direction, the inlet and outlet terminal (11) is located between the first end and the second end.
6. The charging module of claim 1, wherein, The two handles (2) are diagonally arranged at the first side.
7. The charging module of claim 1, wherein, The charging module further comprises: an auxiliary handle (12) arranged on a side of the second side away from the first side, the gripping section of the auxiliary handle (12) extending in the second direction.
8. The charging module of claim 1, wherein, The two handles (2) are integrally formed with the main body (1).
9. A charging system, characterized by The charging system comprises: a cabinet frame (3); a plurality of charging modules according to any one of claims 1-8, stacked in a preset direction in the cabinet frame (3); wherein, the direction in which the first side and the second side are opposite is a third direction, and the charging module has a degree of freedom of sliding in the third direction.
10. The charging system of claim 9, wherein, The charging system further comprises: a plurality of guide rail sets corresponding to the plurality of charging modules and fixed in the cabinet frame (3); wherein, the guide rail set comprises two guide rails (31), both of which extend in the third direction and are located on opposite sides of the corresponding charging module; the charging module and the corresponding two guide rails (31) are in sliding cooperation.