Vehicle end assembly and automated guided charging system

Abstract

The application discloses a vehicle end assembly, which comprises a charging seat and a guiding mechanism, the guiding mechanism comprises a fixed support and a flexible adjusting unit, the fixed support is used for fixedly connecting with a vehicle body; the flexible adjusting unit comprises an X-direction rotating piece, a Y-direction rotating piece and a Z-direction rotating piece, the X-direction rotating piece is rotationally connected with the fixed support around an X axis, the X-direction rotating piece is rotationally connected with the Y-direction rotating piece around a Y axis, the Z-direction rotating piece is rotationally connected with the Y-direction rotating piece around a Z axis, and the Z-direction rotating piece is fixedly connected with the charging seat. The application further discloses an automatic guiding charging system. In the application, the flexible adjusting unit is connected, the orientation of the charging seat in XYZ directions can be automatically adjusted, and the charging seat can be quickly aligned with a charging head for plugging.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging devices, in particular to a vehicle end assembly and an automatic guiding charging system. BACKGROUND

[0002] The existing automatic guiding charging device for vehicles generally comprises a vehicle end assembly and a ground end assembly, the vehicle end assembly is fixedly connected to the bottom of the vehicle body, or the front of the vehicle, or the tail of the vehicle, or the side of the vehicle body, and the ground end assembly is installed on the ground or a charging pile. When the vehicle end assembly is installed at the bottom of the vehicle body and the ground end assembly is installed on the ground, the vehicle drives into a charging position within a set range, and the ground end assembly rises upward, and in the process of rising, the ground end assembly and the vehicle end assembly are automatically guided and moved along the horizontal plane, and finally adjusted to a position aligned with the vehicle end assembly, so that the charging head is inserted into the charging seat.

[0003] However, the vehicle end assembly of this form is fixedly connected to the vehicle body. When the vehicle body is tilted due to load, terrain or abnormal driving system, etc., the vehicle end assembly is also tilted, which affects the guiding alignment with the ground end assembly. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provide a vehicle end assembly and an automatic guiding charging system capable of automatically adjusting the orientation and realizing quick alignment and insertion with the ground end assembly.

[0005] The technical scheme of the present application provides a vehicle end assembly, which comprises a charging seat and a guiding mechanism, the guiding mechanism comprises a fixed support and a flexible adjusting unit, the fixed support is used for fixedly connecting with the vehicle body;

[0006] The flexible adjusting unit comprises an X-direction rotating piece, a Y-direction rotating piece and a Z-direction rotating piece, the X-direction rotating piece is rotationally connected with the fixed support about an X-axis, the X-direction rotating piece is rotationally connected with the Y-direction rotating piece about a Y-axis, the Z-direction rotating piece is rotationally connected with the Y-direction rotating piece about a Z-axis, and the Z-direction rotating piece is fixedly connected with the charging seat.

[0007] Further, the X-direction rotating piece is an outer ring sleeve, the Y-direction rotating piece is a middle ring sleeve, and the Z-direction rotating piece is an inner ring sleeve, and the inner ring sleeve, the middle ring sleeve and the outer ring sleeve are sequentially sleeved from inside to outside.

[0008] Further, the guiding mechanism further comprises a primary guiding piece and a secondary guiding piece, the primary guiding piece is located below the secondary guiding piece, the primary guiding piece is fixedly connected with the vehicle body through the fixed support, the secondary guiding piece is movably connected with the fixed support through the flexible adjusting unit, and the secondary guiding piece is fixedly connected with the charging seat.

[0009] Further, the fixing support comprises a first vertical support and a second vertical support, the first vertical support and the second vertical support are arranged on the top of the first guide and oppositely arranged, the first vertical support and the second vertical support are connected on the opposite sides of the outer ring respectively, two outer rotating shafts are arranged on the outer ring correspondingly, and the outer rotating shafts are rotatably connected with the first vertical support and the second vertical support.

[0010] Further, the outer wall of the middle ring extends two oppositely arranged middle rotating shafts, the middle rotating shafts are rotatably connected with the outer ring, and the center axes of the middle rotating shafts and the outer rotating shafts are perpendicular to each other.

[0011] Further, the lower end of the inner ring is provided with a plurality of lugs, and the lugs are fixedly connected with the top of the second guide.

[0012] Further, the guiding range of the first guide is greater than the guiding range of the second guide, the second guide is provided with a guide hole, and the guide hole is used for inserting the guide column of the ground end assembly.

[0013] The first guide is used for guiding the guide column into the second guide, and the second guide is used for guiding the guide column into the guide hole.

[0014] Further, the first guide is a guide cover, and the inner wall of the guide cover is provided with a first guide surface which is inclined upward from the edge of the guide cover to the center.

[0015] Further, the second guide is a guide seat, the inner wall of the guide seat is provided with a guide groove matched with the guide column, the guide groove is connected with the first guide surface, and the guide hole is located above the guide groove.

[0016] The application also provides an automatic guiding and charging system, which comprises a ground end assembly and a vehicle end assembly.

[0017] After the above technical scheme is adopted, the following beneficial effects are achieved.

[0018] In the application, the XYZ orientation of the charging seat can be automatically adjusted by the flexible adjusting unit, so that the charging seat can be quickly aligned with the charging head for insertion. BRIEF DESCRIPTION OF DRAWINGS

[0019] The disclosure of the present application will become more fully understood from the detailed description given herein below, and the accompanying drawings. It should be understood that the drawings are only for the purpose of illustration and are not intended to limit the scope of the present application. In the drawings:

[0020] Figure 1 is a perspective view of an automatic guiding and charging system in an embodiment of the present application;

[0021] Figure 2 is a perspective view of a secondary guide, a fixed support and a flexible adjusting unit in an embodiment of the present application;

[0022] Figure 3 is an exploded view of a charging base and a primary guide in an embodiment of the present application;

[0023] Figure 4 is a perspective view of a secondary guide in an embodiment of the present application;

[0024] Figure 5 is a bottom view of a secondary guide in an embodiment of the present application;

[0025] Figure 6 is a perspective view of a primary guide in an embodiment of the present application;

[0026] Figure 7 is a sectional view of a primary guide in an embodiment of the present application;

[0027] Figure 8 is an exploded view of a ground end assembly in an embodiment of the present application.

[0028] Legend of reference signs:

[0029] Vehicle end assembly 10:

[0030] Charging base 1, primary guide 2, first guide surface 21;

[0031] Secondary guide 3: guide hole 31, guide groove 32, mounting through hole 33, second guide surface 321;

[0032] Fixed support 4: first vertical support 41, second vertical support 42;

[0033] Flexible adjusting unit 5: X-direction rotating member 51, Y-direction rotating member 52, Z-direction rotating member 53, bearing 54, return spring 55, outer rotating shaft 511, middle rotating shaft 521, lug 531;

[0034] Ground end assembly 20: guide column 6, charging head 7, charging head base 8. DETAILED DESCRIPTION

[0035] The specific embodiments of the present application will be further described below with reference to the accompanying drawings.

[0036] It is easy to understand that, according to the technical solutions of the present application, a person skilled in the art can replace various structural modes and implementation modes with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solutions of the present application, and should not be regarded as the whole or as a limitation or restriction on the technical solutions of the present application.

[0037] In this specification, the orientation terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structure shown in the drawings, which are relative concepts, so they can be changed accordingly according to different positions and different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0038] In the present application, the X, Y, Z directions are based on the orientation of the charging seat 1. Figure 1 The X direction represents the left-right direction of the charging seat 1, the Y direction represents the front-rear direction of the charging seat 1, and the Z direction represents the up-down direction of the charging seat 1, or the central axis direction of the charging seat 1. Figure 1 The X direction represents the left-right direction of the charging seat 1, the Y direction represents the front-rear direction of the charging seat 1, and the Z direction represents the up-down direction of the charging seat 1, or the central axis direction of the charging seat 1. Figure 1 The X direction represents the left-right direction of the charging seat 1, the Y direction represents the front-rear direction of the charging seat 1, and the Z direction represents the up-down direction of the charging seat 1, or the central axis direction of the charging seat 1. Figure 1 The X direction represents the left-right direction of the charging seat 1, the Y direction represents the front-rear direction of the charging seat 1, and the Z direction represents the up-down direction of the charging seat 1, or the central axis direction of the charging seat 1.

[0039] In some embodiments of the present application, as shown in Figures 1-2 The vehicle end assembly 10 includes a charging seat 1 and a guide mechanism, and the guide mechanism includes a fixed support 4 and a flexible adjustment unit 5, and the fixed support 4 is used for fixed connection with the vehicle body.

[0040] As shown in Figures 2-3 The flexible adjustment unit 5 includes an X-direction rotating piece 51, a Y-direction rotating piece 52, and a Z-direction rotating piece 53, the X-direction rotating piece 51 is rotatably connected with the fixed support 4 about the X-axis, the X-direction rotating piece 51 is rotatably connected with the Y-direction rotating piece 52 about the Y-axis, the Z-direction rotating piece 53 is rotatably connected with the Y-direction rotating piece 52 about the Z-axis, and the Z-direction rotating piece 53 is fixedly connected with the charging seat 1.

[0041] The flexible adjustment unit 5 in the present application can adjust the deflection angle in each direction, including the three-direction angle of X, Y, Z, which can be adjusted, so that the charging seat 1 can be adjusted to the position aligned with the central axis of the charging head 7.

[0042] Specifically, the X-direction rotating member 51 rotates relative to the fixed support 4 around the X-axis, and the X-direction rotating member 51 can drive the Y-direction rotating member 52 and the Z-direction rotating member 53 to rotate together. The Y-direction rotating member 52 can rotate relative to the X-direction rotating member 52 around the Y-axis, and the Y-direction rotating member 52 can drive the Z-direction rotating member 53 to rotate together. The Z-direction rotating member 53 can rotate relative to the Y-direction rotating member 52 around the Z-axis and drive the charging base 1 to rotate together. Through the connection of the X-direction rotating member 51, the Y-direction rotating member 52 and the Z-direction rotating member 53, the flexible adjusting unit 5 can rotate towards any direction, and finally the omnibearing adjustment of the charging base 1 is realized.

[0043] Further, as shown in Figure 3 , the X-direction rotating member 51 is an outer ring sleeve, the Y-direction rotating member 52 is a middle ring sleeve, and the Z-direction rotating member 53 is an inner ring sleeve. The inner ring sleeve, the middle ring sleeve and the outer ring sleeve are sequentially sleeved from inside to outside, and the inner ring sleeve and the middle ring sleeve are connected through the bearing 54.

[0044] Specifically, the diameter of the X-direction rotating member 51 is the largest, the diameter of the Y-direction rotating member 52 is medium, and the diameter of the Z-direction rotating member 53 is the smallest. The inner ring sleeve, the middle ring sleeve and the outer ring sleeve are sequentially sleeved from inside to outside, and the outer wall of the Z-direction rotating member 53 and the inner wall of the Y-direction rotating member 52 are connected through the bearing 54, so that the Z-direction rotating member 53 can rotate around the Z-axis inside the Y-direction rotating member 52. The charging base 1 is fixedly connected to the inside of the Z-direction rotating member 53, so that the charging base 1 can adjust the rotation angle in each direction.

[0045] Preferably, as shown in Figure 3 , the bearing 54 is also connected to the reset spring 55, and the reset spring 55 can drive the Z-direction rotating member 53 to reset relative to the Y-direction rotating member 52. Figure 3 The reset spring 55 is located above the bearing 54. Alternatively, the reset spring 55 can be installed below the bearing 54.

[0046] Further, as shown in Figures 2-3 , the fixed support 4 includes a first vertical support 41 and a second vertical support 42, and the first vertical support 41 and the second vertical support 42 are arranged opposite to each other on the top of the primary guide 2. The first vertical support 41 and the second vertical support 42 are respectively connected to opposite sides of the outer ring sleeve, and two outer rotating shafts 511 are correspondingly arranged on the outer ring sleeve. The outer rotating shafts 511 are rotatably connected to the first vertical support 41 and the second vertical support 42.

[0047] Specifically, the first vertical support 41 and the second vertical support 42 both extend along the Z-direction. The fixed support 4 is fixedly connected to the primary guide 2, the chassis of the vehicle body, and the X-direction rotating member 51, and the outer rotating shafts 511 are arranged along the X-direction. Therefore, the X-direction rotating member 51 can rotate around the X-axis.

[0048] Preferably, a reset spring is installed on the outer rotating shaft 511, which can reset the X-direction rotating part 51 under no force.

[0049] Further, as shown in the figure, the outer wall of the middle ring extends two oppositely arranged middle rotating shafts 521, which are rotatably connected with the outer ring, and the middle rotating shafts 521 are perpendicular to the central axis of the outer rotating shaft 511. The middle rotating shafts 521 are arranged along the Y direction, so that the Y-direction rotating part 52 rotates around the Y axis relative to the X-direction rotating part 51. Figure 3

[0050] Preferably, a reset spring is also installed on the middle rotating shaft 521, which can reset the Y-direction rotating part 52 under no force.

[0051] Further, as shown in the figure, the lower end of the inner ring is provided with a plurality of lugs 531, which are fixedly connected with the top of the secondary guide 3. Figure 3

[0052] The Z-direction rotating part 53 is fixedly connected with the secondary guide 3 through three screws passing through the holes of the lugs 531.

[0053] Alternatively, the Z-direction rotating part 53 can also be fixedly connected with the secondary guide 3 by other means, such as welding or gluing.

[0054] In some embodiments of the present application, the guide mechanism further comprises a primary guide and a secondary guide, the primary guide is located below the secondary guide, the primary guide is fixedly connected with the vehicle body through the fixed support, the secondary guide is movably connected with the fixed support through the flexible adjusting unit, and the secondary guide is fixedly connected with the charging base.

[0055] Specifically, the primary guide 2 is located below the secondary guide 3 and is fixedly connected with the vehicle body through the fixed support 4. When the vehicle end assembly 10 is installed at the bottom of the vehicle body and the ground end assembly 20 is installed on the ground, the vehicle end assembly 10 is located above the ground end assembly 20 after the vehicle stops at the set charging position. During the rising of the ground end assembly 20, the guide column 6 of the ground end assembly 20 first contacts the primary guide 2, and the primary guide 2 guides the guide column 6 into the secondary guide 3.

[0056] The secondary guide 3 is located above the primary guide 2, and the secondary guide 3 is not directly connected with the primary guide 2, but is movably connected with the fixed support 4 through the flexible adjusting unit 5, and the charging base 1 is fixedly connected to the upper part of the secondary guide 3.

[0057] ​​When the vehicle chassis tilts due to factors such as load, terrain, or abnormal driving system, the vehicle-end components also tilt. After the guide column 6 contacts the secondary guide 3, the flexible adjustment unit 5 can automatically adjust the orientation of the secondary guide 3, causing the secondary guide 3 and the charging base 1 to deflect, thereby ultimately ensuring that the charging head 7 of the ground terminal component 20 is on the same central axis.

[0058] Preferably, the primary guide 2 and the secondary guide 3 are spaced a certain distance apart along the Z direction to avoid interference between the secondary guide 3 and the primary guide 2 during rotation.

[0059] Furthermore, such as Figure 4 As shown, the guiding range of the primary guide 2 is greater than that of the secondary guide 3. The secondary guide 3 is provided with a guide hole 31, which is used to connect with the guide post 6 of the ground terminal assembly 20.

[0060] The primary guide 2 is used to guide the guide post 6 into the secondary guide 3, and the secondary guide 3 is used to guide the guide post 6 into the guide hole 31.

[0061] Because the guiding range of the primary guide 2 is greater than that of the secondary guide 3, when the vehicle stops at the designated charging position, the primary guide 2 is positioned directly above the ground terminal assembly 20. During the ascent of the guide post 6 of the ground terminal assembly 20, it can contact the primary guide 2 and be guided by it.

[0062] The primary guide 2 guides the guide post 6 toward the secondary guide 3. During the upward movement of the guide post 6, it moves horizontally, thereby adjusting the displacement in the XY direction.

[0063] like Figure 4 As shown, the secondary guide 3 has four guide holes 31, each corresponding to a guide post 6. The secondary guide 3 ultimately guides the guide post 6 into the guide hole 31. After the guide post 6 is inserted into the guide hole 31, the charging head 7 is inserted into the charging base 1.

[0064] Furthermore, such as Figures 6-7 As shown, the primary guide 2 is a guide cover, and the inner wall of the guide cover is provided with a first guide surface 21 that slopes upward from the edge of the guide cover toward the center.

[0065] Specifically, the first guide surface 21 is a continuous, smooth, tapered annular surface disposed on the inner wall of the primary guide member 2. During the ascent of the ground end assembly 20, the top of the post 6 comes into contact with the first guide surface 21, and moves upward from the bottom towards the center under the guidance of the first guide surface 21. The upper edge of the first guide surface 21 aligns with the lower edge of the secondary guide member 3, thereby guiding the guide post 6 into the secondary guide member 3.

[0066] Further, as shown in Figures 4-5 , the second guide 3 is a guide seat, and the inner wall of the guide seat is provided with a guide groove 32 matched with the guide column 6, the guide groove 32 is in butt joint with the first guide surface 21, and the guide hole 31 is located above the guide groove 32.

[0067] Specifically, as shown in Figure 4 , the upper part of the second guide 3 is provided with four guide holes 31 corresponding to the four guide columns 6 respectively, and the middle part of the second guide 3 is provided with a mounting through hole 33 for mounting the charging seat 1.

[0068] As shown in Figure 5 , the lower surface of the second guide 3 is provided with four guide grooves 32, the guide grooves are in butt joint with the first guide surface 21, the guide hole 31 is connected with the guide groove 32 and is located at the highest position of the guide groove 32, and the guide column 6 is guided from the first guide surface 21 into the guide groove 32 and then guided from the guide groove 32 into the guide hole 31.

[0069] Further, as shown in Figure 5 , the guide groove 32 includes three second guide surfaces 321, the second guide surfaces 321 are inclined from bottom to top towards the center of the guide hole 31, and the guide hole 31 is located inside the three second guide surfaces 321. The second guide surface is an inclined plane, and the guide hole 31 is at the highest point of the three second guide surfaces, i.e. the convergence of the three second guide surfaces.

[0070] Alternatively, the second guide surface can also be an arc surface, at this time there is only one second guide surface, the second guide surface gradually inclines from top to bottom along the radial direction of the guide hole 31, and the guide hole 31 is located at the highest point inside the second guide surface.

[0071] In another embodiment of the application, as shown in Figure 1 , the automatic guiding and charging system comprises a ground end assembly 20, the ground end assembly 20 includes a charging head 7, a guide column 6 and a charging head base 8, the guide column 6 and the charging head 7 are installed on the charging head base 8, and further includes the vehicle end assembly 10 in any of the above embodiments, and the guide is used to guide the guide column 6 so that the charging head 7 is inserted into the charging seat 1.

[0072] Specifically, as shown in Figure 8 , the ground end assembly 20 includes a charging head base 8, the charging head 7 is arranged at the center of the charging head base 8, and four guide columns 6 are arranged around the charging head 7. The ground end assembly 20 further includes a lifting unit and a translation unit, the lifting unit can drive the ground end assembly 20 to move up and down along the Z direction, and the translation unit can follow the guide column 6 to translate along the horizontal plane.

[0073] When adjusting, the first guide 2 and the fixed support 4 of the vehicle end assembly 10 are not moved. The lifting unit of the ground end assembly 20 first drives the guide column 6, the charging head 7 and the charging head base 8 to rise. When the guide column 6 contacts the first guide surface 21 of the first guide 2, the first guide surface 21 guides the guide column 6 into the second guide 3. In this process, the charging head 7 and the guide column 6 rise and move along the horizontal plane at the same time.

[0074] When the guide column 6 contacts the second guide 3, the second guide 3 guides the guide column 6 towards the direction of the guide hole 31. At the same time, the guide column 6 acts on the second guide 3 to push the second guide 3 to rotate, so that the central axis of the second guide 3 is aligned with the central axis of the charging head 7, that is, the central axes of the charging head 7 and the charging seat 1 are aligned. In this process, the charging head 7 and the guide column 6 still rise and adjust the horizontal displacement at the same time. The second guide 3 and the charging seat 1 automatically adjust the rotation angles of each direction under the action of the flexible adjustment unit 5, so that the charging head 7 and the charging seat 1 are finally inserted.

[0075] When the vehicle body is inclined due to load, terrain or abnormal driving system, etc., the vehicle end assembly can automatically adjust the rotation angles of each direction, so that the central axes of the charging head 7 of the vehicle end assembly and the charging seat 1 of the ground end assembly are aligned, and fast and accurate charging docking is achieved.

[0076] The above only describes the principles and preferred embodiments of the present application. It should be noted that, for those skilled in the art, on the basis of the principles of the present application, a number of other variations can also be made, which should also be considered as the protection scope of the present application.

Claims

1. A vehicle end module (10) comprising a charging base (1) and a guide mechanism, characterized in that, The guiding mechanism comprises a fixed support (4) and a flexible adjusting unit (5), the fixed support (4) is used for being fixedly connected with a vehicle body; The flexible adjusting unit (5) comprises an X-direction rotating piece (51), a Y-direction rotating piece (52) and a Z-direction rotating piece (53), the X-direction rotating piece (51) is rotationally connected with the fixed support (4) around an X-axis, the X-direction rotating piece (51) is rotationally connected with the Y-direction rotating piece (52) around a Y-axis, the Z-direction rotating piece (53) is rotationally connected with the Y-direction rotating piece (52) around a Z-axis, and the Z-direction rotating piece (53) is fixedly connected with the charging base (1); The guiding mechanism further comprises a primary guide (2) and a secondary guide (3), the primary guide (2) is located below the secondary guide (3), a certain distance is spaced between the primary guide and the secondary guide along the Z-direction, the primary guide (2) is fixedly connected with the vehicle body through the fixed support (4), the secondary guide (3) is movably connected with the fixed support (4) through the flexible adjusting unit (5), and the secondary guide (3) is fixedly connected with the charging base (1); The primary guide (2) is a guide cover, and an inner wall of the guide cover is provided with a first guide surface (21) which is inclined upward from an edge of the guide cover towards a center thereof; The secondary guide (3) is provided with a guide hole, the guide hole is used for being plugged with a guide column of a ground end assembly (20), the secondary guide (3) is a guide seat, an inner wall of the guide seat is provided with a guide groove matched with the guide column, the guide hole is located above the guide groove, the guide groove is butted against the first guide surface (21), the first guide surface is used for guiding the guide column into the guide groove, and the guide groove is used for guiding the guide column into the guide hole.

2. The car end assembly (10) of claim 1, characterized in that, The X-direction rotating piece (51) is an outer ring sleeve, the Y-direction rotating piece (52) is a middle ring sleeve, and the Z-direction rotating piece (53) is an inner ring sleeve, and the inner ring sleeve, the middle ring sleeve and the outer ring sleeve are sequentially sleeved from inside to outside.

3. The car end assembly (10) of claim 2, characterized in that, The fixed support (4) comprises a first vertical support (41) and a second vertical support (42), the first vertical support (41) and the second vertical support (42) are arranged on a top of the primary guide (2) and oppositely arranged, the first vertical support (41) and the second vertical support (42) are respectively connected on opposite sides of the outer ring sleeve, two outer rotating shafts (511) are correspondingly arranged on the outer ring sleeve, and the outer rotating shafts (511) are rotationally connected with the first vertical support (41) and the second vertical support (42).

4. The car end assembly (10) of claim 3, characterized in that, An outer wall of the middle ring sleeve extends two oppositely arranged middle rotating shafts (521), the middle rotating shafts (521) are rotationally connected with the outer ring sleeve, and center axes of the middle rotating shafts (521) and the outer rotating shafts (511) are perpendicular to each other.

5. The car end assembly (10) of claim 2, characterized in that, A lower end of the inner ring sleeve is provided with a plurality of lugs (531), and the lugs (531) are fixedly connected with a top of the secondary guide (3).

6. The car end assembly (10) of claim 2, characterized in that, The guiding range of the primary guide (2) is larger than the guiding range of the secondary guide (3); The primary guide (2) is used for guiding the guide column into the secondary guide (3), and the secondary guide (3) is used for guiding the guide column into the guide hole.

7. An automatic guiding and charging system comprising a ground end assembly (20) comprising a charging head (7), a guiding column (6) and a charging head base (8), the guiding column (6) and the charging head (7) being mounted on the charging head base (8), characterized in that, The vehicle end assembly (10) of any one of claims 1-6, wherein the guide is configured to guide the guide column (6) to insert the charging head (7) into the charging seat (1).

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