Underfloor charging system

Abstract

The application discloses a bottom charging system, which comprises a charging head, an automatic positioning unit, an outer cover and a shielding cover. The charging head and the automatic positioning unit are installed below the outer cover. The automatic positioning unit is used for automatically positioning the charging head. The shielding cover is slidably installed above the outer cover and is used for shielding the charging head. The automatic positioning unit is used for automatically positioning the charging head, so that the charging head can be closer to the charging end of the electric vehicle. On the other hand, the shielding cover is used for shielding the charging head. When the charging head is not used, the shielding cover can protect the charging head from rain and dust. When the charging head needs to be used, the shielding cover slides relative to the outer cover, and the charging head is exposed.

Description

Technical Field

[0001] This invention relates to the technical field of electric vehicle charging equipment, and more particularly to a bottom charging system. Background Technology

[0002] Existing electric vehicle charging stations typically use a charging gun, which users hold and insert into the vehicle to charge. This charging method requires users to get out of the car and operate it manually, which is quite inconvenient.

[0003] Some existing charging systems are designed to be installed on the ground in parking spaces. When a user parks their electric vehicle, the charging system automatically rises and aligns with the charging port on the vehicle to begin charging. However, with the charging head facing upwards, the system is easily damaged by dust and rain. Furthermore, users often cannot park precisely in the correct charging position, and the passive positioning range of the charging head is limited, leading to misalignment between the charging head and the charging port.

[0004] Therefore, it is necessary to design a bottom charging system that can protect the charging head and actively position it. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bottom charging system that can protect and actively position the charging head.

[0006] The present invention provides a bottom charging system, including a charging head, an automatic positioning unit, an outer casing, and a cover. The charging head and the automatic positioning unit are installed below the outer casing. The automatic positioning unit is used to drive the charging head to automatically position itself. The cover is slidably installed above the outer casing and is used to cover the charging head.

[0007] Furthermore, the automatic positioning unit includes a first moving component, a second moving component, an inner box, and an intermediate frame;

[0008] The charging head is installed in the inner box, and the first moving component is connected between the inner box and the intermediate frame. The first moving component is used to drive the inner box to move relative to the intermediate frame along a first direction.

[0009] The second moving component is fixed to the ground and is connected between the intermediate frame and the outer shell. The second moving component is used to drive the intermediate frame, the first moving component, the inner box and the outer shell to move along a second direction, which is perpendicular to the second direction.

[0010] Furthermore, the first moving component includes a first motor, a first drive shaft, a first drive shaft gear, a first lead screw gear, a first lead screw, a first slider, and a first slide rail;

[0011] The first motor drives the first transmission shaft gear to rotate via the first transmission shaft. The first transmission shaft gear drives the first lead screw gear to rotate. The first lead screw gear is installed at the end of the first lead screw and drives the first lead screw to rotate. The first lead screw drives the first slider to slide along the first slide rail. The first slide rail is arranged along the first direction.

[0012] Furthermore, the second moving component includes a second motor, a second drive shaft, a second drive shaft gear, a second lead screw gear, a second lead screw, a second slider, and a second slide rail;

[0013] The second motor drives the second transmission shaft gear to rotate via the second transmission shaft. The second transmission shaft gear drives the second lead screw gear to rotate. The second lead screw gear is installed at the end of the second lead screw and drives the second lead screw to rotate. The second lead screw drives the second slider to slide along the second slide rail. The second slide rail is arranged along the second direction.

[0014] Furthermore, it also includes sensors for detecting the vehicle's position and controlling the movement of the automatic positioning unit based on the vehicle's position.

[0015] Furthermore, it also includes a cover locking assembly;

[0016] When charging is not required, the cover locking assembly locks the cover, which covers the top of the charging head;

[0017] When charging is required, the outer casing moves and drives the cover locking assembly to unlock the cover, the cover moves away and exposes the charging head.

[0018] Furthermore, the inner cover locking assembly includes an unlocking trigger, a linkage rod assembly, and a latch;

[0019] The unlocking trigger is fixed on the outer cover. When the outer cover moves, it drives the unlocking trigger, which in turn causes the linkage rod assembly to separate from the buckle. The buckle is fixed on the cover.

[0020] Furthermore, the linkage assembly includes a first rotating rod, a sliding rod, a second rotating rod, and a locking rod. When the outer casing moves, it triggers the first rotating rod, which in turn causes the sliding rod to lift up. The sliding rod then causes the second rotating rod to rotate. The second rotating rod is connected to the locking rod and causes the locking rod to separate from the buckle.

[0021] Furthermore, the inner cover locking assembly also includes a fixed base, a first rotating base, and a sliding sleeve. The fixed base is fixed to the ground, the first rotating base and the sliding sleeve are fixedly connected to the fixed base, the first rotating rod is rotatably connected to the first rotating base, and the sliding rod passes through the sliding sleeve and can slide within the sliding sleeve.

[0022] Furthermore, the cover includes an outer cover and an inner cover, and the cover locking assembly is connected between the outer cover and the inner cover. The outer cover and the inner cover are connected by an elastic element. When the outer cover moves, it drives the cover locking assembly to unlock the inner cover. When the outer cover moves, it drives the inner cover to move through the elastic element.

[0023] The above technical solution has the following beneficial effects:

[0024] This invention achieves automatic positioning of the charging head through an automatic positioning unit, enabling the charging head to be closer to the charging end of the electric vehicle. On the other hand, this invention uses a cover to shield the charging head, which protects the charging head from rain and dust damage when it is not in use. When it is needed, the cover slides relative to the outer shell, exposing the charging head. Attached Figure Description

[0025] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0026] Figure 1 This is an exploded view of the bottom charging system in one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the outer cover after it has been moved in one embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the inner cover after it has been moved in one embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the first movable component and the inner cover in one embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the second moving component and the intermediate frame in one embodiment of the present invention;

[0031] Figure 6 This is a partially enlarged view of the inner cover locking assembly in one embodiment of the present invention;

[0032] Figure 7 This is a cross-sectional view of the inner cover locking assembly in one embodiment of the present invention;

[0033] Figure 8 This is a cross-sectional view of a spring in one embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of a bottom charging system with only an inner cover in another embodiment of the present invention.

[0035] Appendix Label Reference Table:

[0036] 1. Charging head; 3. Outer shell; 7. Spring;

[0037] Automatic positioning unit 2: first moving component 21, second moving component 22, inner box 23 and intermediate frame 24;

[0038] First moving component 21: first motor 211, first drive shaft 212, first drive shaft gear 213, first lead screw gear 214, first lead screw 215, first slider 216 and first slide rail 217;

[0039] Second moving component 22: second motor 221, second drive shaft 222, second drive shaft gear 223, second lead screw gear 224, second lead screw 225, second slider 226, and second slide rail 227;

[0040] Inner box 23: upper cover 231 and lower box body 232;

[0041] Outer cover 4: Second slider 41;

[0042] Inner cover 5: Second slide rail 51;

[0043] Cover locking assembly 6: unlock trigger 61, first rotating rod 62, sliding rod 63, second rotating rod 64, locking rod 65, buckle 66, fixing seat 67, first rotating seat 68, sliding sleeve 69, second rotating seat 70. Detailed Implementation

[0044] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0045] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0046] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0047] In some embodiments of the present invention, such as Figure 1 As shown, the bottom charging system includes a charging head 1, an automatic positioning unit 2, an outer casing 3, and a cover. The charging head 1 and the automatic positioning unit 2 are installed below the outer casing 3. The automatic positioning unit 2 is used to drive the charging head 1 to be automatically positioned. The cover is slidably installed above the outer casing 3 and is used to cover the charging head 1.

[0048] In this embodiment, the shielding cover includes an outer cover 4, which is located above the outer casing 3 and is used to shield the charging head 1. The charging head 1 and the automatic positioning unit 2 are both located below the outer casing 3.

[0049] When charging is not needed, the cover covers the top of the charging head 1 to prevent rain and dust from entering the charging head 1;

[0050] When ready to charge, the cover slides relative to the outer casing 3, exposing the charging head 1. Then, the automatic positioning unit 2 adjusts the position of the charging head 1 according to the current position of the electric vehicle, bringing the charging head 1 close to the charging terminal on the electric vehicle. Finally, the charging head 1 rises from the outer casing 3. During the rising process, the charging head 1 is passively adjusted and positioned through a mechanical structure during the docking process, and finally plugs into the charging terminal to realize charging.

[0051] Furthermore, such as Figure 1 and Figure 4-5 As shown, the automatic positioning unit 2 includes a first moving component 21, a second moving component 22, an inner box 23, and an intermediate frame 24;

[0052] The charging head 1 is installed in the inner box 23. The first moving component 21 is connected between the inner box 23 and the intermediate frame 24. The first moving component 21 is used to drive the inner box 23 to move relative to the intermediate frame 24 in a first direction.

[0053] The second moving component 22 is fixed on the ground and is connected between the intermediate frame 24 and the outer shell 3. The second moving component 22 is used to drive the intermediate frame 24, the first moving component 21, the inner box 23 and the outer shell 3 to move along the second direction, which is perpendicular to the second direction.

[0054] Specifically, such as Figure 4As shown, the charging head 1 is installed in the inner box 23, and the charging head 1 can rise out of the inner box 23.

[0055] like Figure 1 As shown, the first moving component 21 is connected between the inner box 23 and the intermediate frame 24.

[0056] like Figure 4 As shown, the first moving component 21 is mounted on the outer side wall of the inner box 23, and the inner side wall of the intermediate frame 24 is connected to the first moving component 21. The first moving component 21 can drive the inner box 23 to move relative to the intermediate frame 24 along a first direction. In this embodiment, the first direction refers to the Y direction, that is, the left-right direction of the vehicle body.

[0057] like Figure 5 As shown, the second moving component 22 is fixed to the ground and is installed on the outer wall of the intermediate frame 24, while also being connected to the inner wall of the outer casing 3. The second moving component 22 is used to move the intermediate frame 24, the first moving component 21, the inner box 23, and the outer casing 3 together along a second direction, where the first direction and the second direction are perpendicular to each other. In this embodiment, the second direction refers to the X-direction, i.e., the front-rear direction of the vehicle body.

[0058] By adjusting the first moving component 21 and the second moving component 22, the charging head 1 can be positioned within a certain range, making it closer to the charging end of the electric vehicle. In this embodiment, the positioning range is 50mm forward and backward, and 100mm left and right.

[0059] Furthermore, such as Figure 4 As shown, the first moving component 21 includes a first motor 211, a first transmission shaft 212, a first transmission shaft gear 213, a first lead screw gear 214, a first lead screw 215, a first slider 216, and a first slide rail 217;

[0060] The first motor 211 drives the first transmission shaft gear 213 to rotate via the first transmission shaft 212. The first transmission shaft gear 213 drives the first lead screw gear 214 to rotate. The first lead screw gear 214 is installed at the end of the first lead screw 215 and drives the first lead screw 215 to rotate. The first lead screw 215 drives the first slider 216 to slide along the first slide rail 217. The first slide rail 217 is arranged along the first direction.

[0061] Specifically, the first motor 211 is fixed to the outer wall of the inner box 23. The first motor 211 is connected to the first drive shaft 212 via a gear set. The first drive shaft 212 is arranged along the X-axis. Two first drive shaft gears 213 are fixedly connected to both ends of the first drive shaft 212. The first drive shaft gears 213 mesh with the first lead screw gear 214. The first lead screw gear 214 is fixedly connected to the end of the first lead screw 215. The first lead screw 215 and the first slide rail 217 are mounted on two fixed plates 218. The first slider 216 is fixedly connected to the first lead screw 215. When the first lead screw 215 is driven to move along the Y-axis, it drives the first slider 216 to slide along the first slide rail 217. The first slider 216 is fixedly connected to the intermediate frame 24. Therefore, when the first motor 211 is driven, it can drive the inner box 23 to move relative to the intermediate frame 24 along the Y-axis, thereby driving the charging head 1 to move along the Y-axis.

[0062] Furthermore, such as Figure 5 As shown, the second moving component 22 includes a second motor 221, a second transmission shaft 222, a second transmission shaft gear 223, a second lead screw gear 224, a second lead screw 225, a second slider 226, and a second slide rail 227.

[0063] The second motor 221 drives the second transmission shaft gear 223 to rotate via the second transmission shaft 222. The second transmission shaft gear 223 drives the second lead screw gear 224 to rotate. The second lead screw gear 224 is installed at the end of the second lead screw 225 and drives the second lead screw 225 to rotate. The second lead screw 225 drives the second slider 226 to slide along the second slide rail 227. The second slider 226 is fixed on the ground, and the second slide rail 227 is arranged along the second direction.

[0064] The second motor 221 is fixed to the outer wall of the intermediate frame 24. The second motor 221 drives the rotation of the second transmission shaft 222 through a gear set. Two second transmission shaft gears 223 are respectively fixedly connected to the two ends of the second transmission shaft 222. The second transmission shaft 222 is arranged along the Y direction. The second transmission shaft gears 223 mesh with the second lead screw gear 224. The second lead screw gear 224 is connected to the end of the second lead screw 225. The second lead screw 225 is arranged along the X direction. The second slider 226 is fixedly connected to the second lead screw 225 and slides along the second slide rail 227. The second slider 226 is fixed to the ground and is also fixedly connected to the outer cover 3. Therefore, when the second motor 221 is driven, it can drive the intermediate frame 24, the first moving component 21, the inner box 23, and the outer cover 3 to move together along the X direction, thereby driving the first moving component 21 and the charging head 1 to move together along the X direction.

[0065] Furthermore, such as Figure 1As shown, the inner box 23 includes an upper cover 231 and a lower box body 232. The upper cover 231 has a through hole and is placed on the lower box body 232. The charging head 1 is installed at the bottom of the lower box body 232 and can extend out from the through hole when the charging head 1 rises.

[0066] Specifically, the lower box 232 is a rectangular box, and the upper cover 231 is a rectangular cover with a through hole in the middle and a flange around the edge of the through hole. When the charging head 1 is lowered, it can be completely retracted into the inner box 23, and the cover can completely block the opening of the through hole to prevent rainwater and dust from entering the inner box 23.

[0067] Furthermore, it also includes sensors (not shown) used to detect the vehicle's position and control the movement of the automatic positioning unit 2 based on the vehicle's position.

[0068] Specifically, the sensor transmits the current position of the electric vehicle to the central processing unit, which calculates the distance in the X and Y directions that the charging head 1 needs to move, and then controls the inner motor 211 and the outer motor 221 to operate respectively.

[0069] In one embodiment of the present invention, as Figure 2 As shown, it also includes a cover locking assembly 6;

[0070] When charging is not required, the cover locking component 6 locks the cover, and the cover covers the top of the charging head 1;

[0071] When charging is needed, the outer cover 3 moves and drives the cover locking component 6 to unlock the cover, the cover moves away and exposes the charging head 1.

[0072] In a preferred embodiment of the present invention, such as Figure 1-3 As shown, the cover includes an outer cover 4 and an inner cover 5. The cover locking assembly 6 is connected between the outer cover 3 and the inner cover 5. The outer cover 4 and the inner cover 5 are connected by a spring 7 (see...). Figure 8 )connect.

[0073] Specifically, such as Figure 1 As shown, when charging is not required, the cover locking assembly 6 locks the inner cover 5. At this time, both the outer cover 4 and the inner cover 5 are located above the charging head 1, covering the charging head 1.

[0074] like Figure 2 As shown, the outer cover 4 moves, exposing the inner cover 5, and the outer cover 4 stretches the spring 7. At this time, the inner cover 5 is still locked by the cover locking assembly 6, so the inner cover 5 remains stationary. A motor can be installed at the outer cover 4, and the outer cover 4 is driven by the motor. Alternatively, the outer cover 4 can be moved via a linkage when the outer casing 3 moves.

[0075] like Figure 3As shown, after the outer cover 3 moves, it drives the cover locking assembly 6 to unlock the inner cover 5. At this time, the spring 7 pulls the inner cover 5 to move towards the direction close to the outer cover 4, exposing the charging head 1. The inner cover 5 moves to the bottom of the outer cover 4.

[0076] Furthermore, such as Figure 6-7 As shown, the cover locking assembly 6 includes an unlocking trigger 61, a first rotating rod 62, a sliding rod 63, a second rotating rod 64, a locking rod 65, and a latch 66;

[0077] The unlocking trigger 61 is fixed on the outer cover 3. When the outer cover 3 moves, it triggers the first rotating rod 62. The first rotating rod 62 drives the sliding rod 63 to lift up. The sliding rod 63 drives the second rotating rod 64 to rotate. The second rotating rod 64 is connected to the locking rod 65 and drives the locking rod 65 to separate from the buckle 66. The buckle 66 is fixed on the inner cover 5.

[0078] Specifically, the unlocking trigger 61 is a rod structure with barbs, and the unlocking trigger 61 is fixed to the outer surface of the outer casing 3. For example... Figure 6 As shown, before the outer casing 3 moves, the unlocking trigger 61 and the first rotating rod 62 do not contact each other and maintain a certain distance.

[0079] After the outer casing 3 moves a certain distance, the unlocking trigger 61 drives the first rotating rod 62 along... Figure 6 Rotating clockwise causes the first rotating rod 62 to move the sliding rod 63 upward. The sliding rod 63 lifts one end of the second rotating rod 64 and causes the other end of the second rotating rod 64 to tilt downward. The second rotating rod 64 causes the locking rod 65 to tilt downward as well, so that the locking rod 65 separates from the buckle 66, thereby unlocking the inner cover 5.

[0080] like Figure 8 As shown, the movement of the outer cover 4 stretches the spring 7. When the inner cover 5 is unlocked, the spring 7 causes the inner cover 5 to move toward the outer cover 4.

[0081] Optionally, the first rotating rod 62, the sliding rod 63, the second rotating rod 64, and the locking rod 65 can also be other linkage rod structures. After the linkage rod is driven by the unlocking trigger 61, it separates from the buckle 66 to unlock the inner cover 5.

[0082] Furthermore, such as Figure 6 As shown, the locking rod 65 and the second rotating rod 64 are slidably connected. The second rotating rod 64 can be a slide rail structure. One end of the locking rod 65 is connected to the second rotating rod 64 through a slider. The locking rod 65 is also connected to the second rotating seat 70. When the second rotating rod 64 drives the locking rod 65 to tilt downward, the locking rod 65 rotates clockwise around the second rotating seat 70.

[0083] Since the sliding rod 63 can only slide up and down in the vertical direction, when the second rotating rod 64 rotates around the end of the sliding rod 63, relative sliding will occur between the second rotating rod 64 and the locking rod 65 in order to avoid interference.

[0084] Furthermore, such as Figure 6-7 As shown, the cover locking assembly 6 also includes a fixed base 67, a first rotating base 68, and a sliding sleeve 69. The fixed base 67 is fixed to the ground, the first rotating base 68 and the sliding sleeve 69 are fixedly connected to the fixed base 67, the first rotating rod 62 is rotatably connected to the first rotating base 68, and the sliding rod 63 passes through the sliding sleeve 69 and can slide inside the sliding sleeve 69.

[0085] Specifically, the fixed base 67 is fixed on the ground, the first rotating base 68 is fixed at the bottom of the fixed base 67, the first rotating rod 62 is rotatably connected to the first rotating base 68, the sliding sleeve 69 is located at the upper end of the fixed base 67, the hollow of the sliding sleeve 69 is in the vertical direction, the sliding rod 63 passes through the sliding sleeve 69, and the sliding sleeve 69 makes the sliding rod 63 slide only in the vertical direction.

[0086] Furthermore, such as Figure 2 and Figure 7 As shown, the inner cover 5 is equipped with a second slide rail 51, and the outer cover 4 is provided with a second slider 41. The outer cover 4 moves relative to the inner cover 5, and the second slider 41 slides along the second slide rail 51.

[0087] Specifically, the second slide rail 51 is arranged along the moving direction of the outer cover 3, so that the moving direction of the inner cover 5 is consistent with the moving direction of the outer cover 4 and the outer cover 3.

[0088] Optionally, such as Figure 9 As shown, the cover can consist of only an inner cover 5, which can be connected to a compression spring. When the inner cover 5 is locked by the cover locking assembly 6, the compression spring is compressed. When the inner cover 5 is unlocked, the compression spring will spring the inner cover 5 open, causing the inner cover 5 to move away from the through hole of the upper cover 231.

[0089] This invention achieves automatic positioning of the charging head through an automatic positioning unit, enabling the charging head to be closer to the charging end of the electric vehicle. On the other hand, this invention uses a cover to shield the charging head, which protects the charging head from rain and dust damage when it is not in use. When it is needed, the cover slides relative to the outer shell, exposing the charging head.

[0090] The above description is merely the principle and preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principle of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. A bottom charging system, comprising a charging head, characterized in that, It also includes an automatic positioning unit, an outer casing, and a cover. The charging head and the automatic positioning unit are installed below the outer casing. The automatic positioning unit is used to drive the charging head to automatically position itself. The cover is slidably installed above the outer casing and is used to cover the charging head. It also includes a cover locking assembly; When charging is not required, the cover locking assembly locks the cover, which covers the top of the charging head; When charging is required, the outer cover moves and drives the cover locking assembly to unlock the cover, the cover moves away and exposes the charging head; The cover locking assembly includes an unlocking trigger, a linkage rod assembly, and a latch; The unlocking trigger is fixed on the outer cover. When the outer cover moves, it drives the unlocking trigger, which in turn causes the linkage rod assembly to separate from the buckle. The buckle is fixed on the cover.

2. The bottom charging system according to claim 1, characterized in that, The automatic positioning unit includes a first moving component, a second moving component, an inner box, and an intermediate frame; The charging head is installed in the inner box, and the first moving component is connected between the inner box and the intermediate frame. The first moving component is used to drive the inner box to move relative to the intermediate frame along a first direction. The second moving component is fixed to the ground and is connected between the intermediate frame and the outer shell. The second moving component is used to drive the intermediate frame, the first moving component, the inner box and the outer shell to move along a second direction, which is perpendicular to the second direction.

3. The bottom charging system according to claim 2, characterized in that, The first moving component includes a first motor, a first drive shaft, a first drive shaft gear, a first lead screw gear, a first lead screw, a first slider, and a first slide rail; The first motor drives the first transmission shaft gear to rotate via the first transmission shaft. The first transmission shaft gear drives the first lead screw gear to rotate. The first lead screw gear is installed at the end of the first lead screw and drives the first lead screw to rotate. The first lead screw drives the first slider to slide along the first slide rail. The first slide rail is arranged along the first direction.

4. The bottom charging system according to claim 2, characterized in that, The second moving component includes a second motor, a second drive shaft, a second drive shaft gear, a second lead screw gear, a second lead screw, a second slider, and a second slide rail; The second motor drives the second transmission shaft gear to rotate via the second transmission shaft. The second transmission shaft gear drives the second lead screw gear to rotate. The second lead screw gear is installed at the end of the second lead screw and drives the second lead screw to rotate. The second lead screw drives the second slider to slide along the second slide rail. The second slide rail is arranged along the second direction.

5. The bottom charging system according to claim 1, characterized in that, It also includes sensors for detecting the vehicle's position and controlling the movement of the automatic positioning unit based on the vehicle's position.

6. The bottom charging system according to claim 1, characterized in that, The linkage assembly includes a first rotating rod, a sliding rod, a second rotating rod, and a locking rod. When the outer casing moves, it triggers the first rotating rod, which in turn causes the sliding rod to lift up. The sliding rod then causes the second rotating rod to rotate. The second rotating rod is connected to the locking rod and causes the locking rod to separate from the buckle.

7. The bottom charging system according to claim 6, characterized in that, The cover locking assembly further includes a fixed base, a first rotating base, and a sliding sleeve. The fixed base is fixed to the ground, the first rotating base and the sliding sleeve are fixedly connected to the fixed base, the first rotating rod is rotatably connected to the first rotating base, and the sliding rod passes through the sliding sleeve and can slide within the sliding sleeve.

8. The bottom charging system according to claim 1, characterized in that, The cover includes an outer cover and an inner cover. The cover locking assembly is connected between the outer cover and the inner cover. The outer cover and the inner cover are connected by an elastic element. When the outer cover moves, it drives the cover locking assembly to unlock the inner cover. When the outer cover moves, it drives the inner cover to move through the elastic element.

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