Anti-collision wireless charging receiving end protection structure integrated in vehicle chassis

Abstract

The application provides a kind of integrated in vehicle chassis anti-collision wireless charging receiving end protection structure, it relates to new energy automobile wireless charging technical field, including: symmetric fixed installation in the inside of battery lower guard plate of vehicle chassis mounting plate, drive mechanism being located at the opposite side of the mounting plate and wireless charging receiving end assembly being connected with the drive mechanism;The one end of the drive mechanism is connected with the bearing frame, the inside of the bearing frame is contacted with the wireless charging receiving end assembly through the spring buffer anti-collision mechanism at one end;The other end is directly contacted with the wireless charging receiving end assembly;The application adopts the storage type design completely integrated in the inside of battery lower guard plate of chassis, the wireless charging receiving end is completely withdrawn into the closed storage cavity under non-charging state, and the bottom opening is closed by cooperating with the closable protection telescopic plate, to form a fully enclosed protection space, which reduces the damage probability of the receiving end from the root.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology for new energy vehicles, and in particular to a collision-resistant wireless charging receiver protection structure integrated into the vehicle chassis. Background Technology

[0002] With the accelerated electrification transformation of the global automotive industry, the convenience of charging new energy vehicles has become one of the core competitive advantages. Wireless power transfer technology, with its significant advantages such as no physical contact, no plugging and unplugging losses, high degree of automation, and adaptability to both static and dynamic charging scenarios, has become an important development direction for new energy vehicle charging systems. An on-board wireless charging system mainly consists of a ground-side transmitter assembly and a vehicle-side receiver assembly. During operation, it uses the principle of magnetic field resonant coupling to achieve contactless power transfer from the ground transmitter to the on-board receiver, ultimately charging the vehicle's power battery.

[0003] Currently, the mainstream installation solution for in-vehicle wireless charging receivers is fixed chassis mounting, which involves directly fixing the receiver assembly to the lower surface of the vehicle chassis using a metal bracket. It is usually placed in a flat area under the battery pack or under the front compartment of the vehicle. However, there are serious shortcomings in protection during actual use: the daily driving conditions of vehicles are complex, and obstacles such as protruding stones, speed bumps, curbs, and pitted manhole covers on the road can easily cause scratches, impacts, and bottoming-out impacts to the receiver. Over time, this can lead to malfunctions such as cracking of the receiver shell, breakage of the internal ferrite core, displacement of the coil windings, and failure of the sealing and waterproof structure. This not only significantly reduces charging efficiency and product lifespan, but in severe cases, it can also cause safety accidents such as insulation breakdown and electrical short circuits.

[0004] To address the aforementioned issues, existing technologies have introduced liftable wireless charging receiver structures. These structures use a lifting mechanism to retract the receiver to the inside of the chassis when not charging and extend it to the working position when charging. However, most existing lifting solutions employ rigid connection designs. If the receiver is impacted from the bottom while extended, the impact load is directly transmitted to precision transmission components such as lead screws, motors, and bearings. This can easily cause irreversible damage such as stripped threads, deformed motor shafts, and broken bearings, resulting in extremely high repair costs. Furthermore, most solutions only have a single level of elastic buffering, which cannot adapt to different levels of impact loads. The buffering response is insensitive under small impacts, and the energy absorption capacity is insufficient under large impacts, resulting in very limited protection. Summary of the Invention

[0005] The purpose of this invention is to provide a collision-resistant wireless charging receiver protection structure integrated into the vehicle chassis, thereby solving the technical problems existing in the prior art.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] A collision-resistant wireless charging receiver protection structure integrated into a vehicle chassis includes: a mounting plate symmetrically fixedly installed on the inner side of the battery underbody protection plate of the vehicle chassis; a drive mechanism located on the opposite side of the mounting plate; and a wireless charging receiver assembly connected to the drive mechanism. One end of the drive mechanism is connected to a support frame, and one end of the inner side of the support frame contacts the wireless charging receiver assembly through a spring-loaded anti-collision mechanism; the other end directly contacts the wireless charging receiver assembly. The spring-loaded anti-collision mechanism is used to absorb impact energy through elastic deformation when the wireless charging receiver assembly is subjected to vertical impact or when the drive mechanism is operating.

[0008] Furthermore, the bottom working surface of the mounting plate is provided with a protective mechanism, which is flush with the vehicle chassis and is used to protect the wireless charging receiver assembly when it is not in operation.

[0009] Furthermore, the driving mechanism includes: a drive motor, a ball screw transmission assembly connected to the output end of the drive motor, and a connecting block connected to the ball screw transmission assembly; the drive motor is mounted on one side of the upper part of the mounting plate via a mounting base; the ball screw transmission assembly is rotatably connected to a support plate, the support plate is horizontally fixed to the mounting plate, and guide posts are provided on both sides of the bottom end, the guide posts being slidably connected to the connecting block; one side of the connecting block is connected to the bearing frame, which is used to drive the wireless charging receiver assembly to perform linear reciprocating motion along the vertical direction.

[0010] Furthermore, the spring buffer anti-collision mechanism includes: a horizontal plate and an upper support plate connected to each other by a first buffer spring, and a lower support plate connected to the upper support plate by a second buffer spring; one side of the horizontal plate is connected to the bearing frame by a fixing plate; one side of the lower support plate has a preset anti-slip texture and is in contact with the top working surface of the wireless charging receiver assembly.

[0011] Furthermore, the protective mechanism includes: a storage box with the bottom end of the mounting plate, a telescopic protective plate disposed inside the storage box, and two electric push rods disposed on one working surface of the storage box; the telescopic ends of the electric push rods are connected to the telescopic rods, and the telescopic rods are connected to the telescopic protective plate through multiple connectors; the telescopic protective plate is provided with a honeycomb energy-absorbing layer on the side facing the wireless charging receiver assembly, and the honeycomb energy-absorbing layer is used to absorb impact energy through structural deformation when the telescopic protective plate is impacted from the bottom.

[0012] Furthermore, the two retractable protective plates are symmetrically arranged on the left and right, and open and close in opposite directions along the center line of the opening at the bottom of the vehicle body.

[0013] Furthermore, the telescopic protective plate is half the working size of the opening at the bottom of the vehicle body.

[0014] Furthermore, the top of the mounting base is provided with an electromagnetic shielding aluminum plate, which is used to suppress the electromagnetic field generated by the wireless charging receiver assembly.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (i) The present invention adopts a storage design that is fully integrated into the inner side of the chassis battery under protection plate. When not charging, the wireless charging receiver is completely retracted into the closed storage cavity. With the help of the closable protective telescopic plate, the bottom opening is closed to form a fully enclosed protective space, thereby effectively isolating the erosion of external environment such as road mud, sand, gravel, ice and snow, and completely avoiding scratches during daily driving, thus reducing the probability of damage to the receiver from the root.

[0017] (II) The present invention is equipped with a two-stage buffer anti-collision mechanism consisting of a high-stiffness first buffer spring and a low-stiffness second buffer spring, forming a graded energy absorption system with differentiated stiffness; under small and medium impacts, the low-stiffness spring deforms and responds first, while under large impacts, the high-stiffness spring intervenes to bear the load, realizing progressive buffer energy absorption. This not only ensures the transmission rigidity and positional accuracy during normal lifting and lowering, but also effectively absorbs impact energy during impact, transforming rigid impact into elastic buffer, avoiding direct damage to precision transmission components such as ball screws and drive motors by impact force, while protecting fragile components such as coils and magnetic cores inside the receiving end, and greatly improving the impact resistance life and operational reliability of the overall structure.

[0018] (iii) The protective telescopic plate of the present invention can not only achieve bottom sealing in the storage state to prevent mud, water and sand from entering, but also the honeycomb energy-absorbing layer attached inside can absorb the bottom impact energy through plastic deformation, so that the protective plate itself has the ability to resist impact and absorb energy, and can withstand the slight bottoming and scraping impact during driving, further enhancing the bottom protection performance in the storage state. Attached Figure Description

[0019] Figure 1 This is a perspective view of a collision-resistant wireless charging receiver protection structure integrated into a vehicle chassis, as disclosed in this invention.

[0020] Figure 2 This is an overall diagram of a collision-resistant wireless charging receiver protection structure integrated into a vehicle chassis, as disclosed in this invention.

[0021] Figure 3 This is a schematic diagram of the non-working state of a collision-resistant wireless charging receiver protection structure integrated into a vehicle chassis, as disclosed in this invention.

[0022] Figure 4 This is a schematic diagram showing the connection between the drive mechanism and the spring buffer anti-collision mechanism of an anti-collision wireless charging receiver protection structure integrated into a vehicle chassis, as disclosed in this invention.

[0023] Figure 5 This is a perspective view of a spring-buffered anti-collision mechanism for an anti-collision wireless charging receiver protection structure integrated into a vehicle chassis, as disclosed in this invention.

[0024] Figure 6 This is a partial connection diagram of the protective mechanism of a collision-resistant wireless charging receiver protection structure integrated into a vehicle chassis, as disclosed in this invention.

[0025] Figure 7 This is a schematic diagram of the installation of a collision-resistant wireless charging receiver protection structure integrated into a vehicle chassis, as disclosed in this invention.

[0026] In the diagram: 1. Mounting plate; 2. Drive mechanism; 201. Drive motor; 202. Mounting base; 203. Support plate; 204. Ball screw transmission assembly; 205. Connecting block; 206. Guide column; 207. Bearing frame; 3. Spring buffer anti-collision mechanism; 301. Fixing plate; 302. Horizontal plate; 303. Upper support plate; 304. First buffer spring; 305. Second buffer spring; 306. Lower support plate; 4. Protective mechanism; 401. Storage box; 402. Telescopic protective plate; 403. Electric push rod; 404. Telescopic rod; 405. Connector; 406. Honeycomb energy-absorbing layer; 5. Wireless charging receiver assembly; 6. Electromagnetic shielding aluminum plate; 7. Vehicle body. Detailed Implementation

[0027] To make the content of this invention easier to understand, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0028] like Figures 1-2As shown, this embodiment provides a collision-resistant wireless charging receiver protection structure integrated into a vehicle chassis, including: a mounting plate 1 symmetrically fixedly installed on the inner side of the battery underbody plate of the vehicle body 7, a drive mechanism 2 located on the opposite side of the mounting plate 1, and a wireless charging receiver assembly 5 connected to the drive mechanism 2; it not only provides a stable mounting foundation for the entire protection structure, but also utilizes the space inside the battery underbody plate to achieve a compact layout; the mounting plate 1 is made of 5mm thick high-strength cold-rolled steel plate, stamped and formed, and the surface is treated with cathodic electrophoresis for rust prevention and salt spray test. The testing period is no less than 720 hours, demonstrating excellent structural strength and corrosion resistance. The mounting plate 1's outline dimensions are adapted to the reserved installation space of the target vehicle's battery underbody plate. Eight M8 bolt mounting holes are evenly arranged around its perimeter, and it is fixedly connected to the inner surface of the battery underbody plate of the vehicle body 7 using high-strength bolts. After installation, the mounting plate 1 is arranged vertically, providing a stable mounting base for subsequent components. One end of the drive mechanism 2 is connected to the support frame 207, and one end of the inner side of the support frame 207 contacts the wireless charging receiver assembly 5 through a spring-loaded anti-collision mechanism 3. One end is directly in contact with the wireless charging receiver assembly 5. The drive mechanism 2 provides precise motion control for the support frame 207 and the wireless charging receiver assembly 5 connected thereto. The spring buffer anti-collision mechanism 3 is used to absorb impact energy by elastic deformation when the wireless charging receiver assembly 5 is subjected to vertical impact and when the drive mechanism 2 is operating, thereby protecting the wireless charging receiver assembly 5 from direct damage by impact force and ensuring its stable operation in complex vehicle driving environments. The top of the mounting base 202 is provided with an electromagnetic shielding aluminum plate 6. The electromagnetic shielding aluminum plate 6 is used to suppress the electromagnetic field generated by the wireless charging receiver assembly 5. During wireless charging, the wireless charging receiver assembly 5 will inevitably generate an electromagnetic field. If it is not suppressed, these electromagnetic fields may interfere with other electronic devices in the vehicle and affect the normal operation of the vehicle's overall electronic system. By setting the electromagnetic shielding aluminum plate 6, the electromagnetic field generated by the wireless charging receiver assembly 5 is effectively blocked and absorbed, ensuring that the electronic devices inside the vehicle can work in a stable and interference-free electromagnetic environment, greatly improving the overall safety and reliability of the vehicle.

[0029] like Figure 3As shown, the bottom working surface of the mounting plate 1 is provided with a protective mechanism 4, which is flush with the chassis of the vehicle body 7. It is used to protect the wireless charging receiver assembly 5 when it is not in operation. When the wireless charging receiver assembly 5 is not in operation, the protective mechanism 4 plays a crucial protective role. During daily vehicle operation, mud, sand, gravel and other debris on the road surface, as well as various potential collision risks, may damage the wireless charging receiver assembly 5. The protective mechanism 4 can effectively block these external factors from invading and ensure that the wireless charging receiver assembly 5 is not affected or damaged by the external environment when it is not in operation, thereby extending its service life and ensuring the stability and reliability of its performance.

[0030] like Figure 4 As shown, the driving mechanism 2 includes: a drive motor 201, a ball screw transmission assembly 204 connected to the output end of the drive motor 201, and a connecting block 205 connected to the ball screw transmission assembly 204; the drive motor 201 is mounted on one side of the upper part of the mounting plate 1 via a mounting base 202; the ball screw transmission assembly 204 is rotatably connected to the support plate 203, and the ball screw transmission assembly 204 is prior art, which will not be described in detail here; the support plate 203 is horizontally fixed to the mounting plate 1, and the support plate 203 provides stable support for the ball screw transmission assembly 204, enabling it to operate smoothly; guide posts 206 are provided on both sides of the bottom end of the support plate 203, and the guide posts 206 are connected to the connecting block 205. The connecting block 205 is slidably connected; one side of the connecting block 205 is connected to the support frame 207, which is used to drive the wireless charging receiver assembly 5 to perform vertical linear reciprocating motion. When the drive motor 201 starts, the connecting block 205 is driven to perform vertical linear reciprocating motion along the guide post 206 through the operation of the ball screw transmission assembly 204. This can accurately drive the support frame 207 and the wireless charging receiver assembly 5 to achieve vertical linear reciprocating motion. Through precise motion control, the wireless charging receiver assembly 5 can accurately move to the appropriate position when charging is needed, and can safely return to the protective position when not charging, providing a strong guarantee for the normal operation and effective protection of the wireless charging receiver assembly 5.

[0031] like Figure 5As shown, the spring buffer anti-collision mechanism 3 includes: a horizontal plate 302 and an upper support plate 303 connected to each other by a first buffer spring 304, and a lower support plate 306 connected to the upper support plate 303 by a second buffer spring 305; the fixed plate 301 is made of 10mm thick steel plate and can support the working force of the entire spring buffer anti-collision mechanism 3; the horizontal plate 302 and the fixed plate 301 are integrally bent, and the area of ​​the horizontal plate 302 is larger than that of the fixed plate 301; one side of the horizontal plate 302 is connected to the bearing frame 207 through the fixed plate 301, so that the spring buffer anti-collision mechanism 3 and the bearing frame 207 are tightly integrated into a whole, thereby better bearing and transmitting forces from all directions; one side of the working surface of the lower support plate 306 has a preset anti-slip texture and is in contact with the top working surface of the wireless charging receiver assembly 5. The anti-slip texture of the lower support plate 306 increases the friction between the two, which not only ensures the stability of the wireless charging receiver assembly 5 within the support frame 207, preventing it from shifting due to bumps or vibrations during vehicle operation, but also better transmits the buffering force to the wireless charging receiver assembly 5 when an impact occurs. The first buffer spring 304 and the second buffer spring 305 have preset compression values, which can firmly fix the wireless charging receiver assembly 5 within the support frame 207. Under the action of vertical impact load, the second buffer spring 305 will first undergo compression deformation to absorb the first level of impact energy. When the impact load increases, after the second buffer spring 305 reaches a certain stroke, the upper support plate 303 moves upward, and the first buffer spring 304 begins to be compressed to absorb the second level of impact energy, thus forming a two-level buffer system of soft-level buffering and hard-level buffering.

[0032] like Figures 6-7As shown, the protective mechanism 4 includes: a storage box 401 with the bottom of the mounting plate 1, a telescopic protective plate 402 disposed inside the storage box 401, and two electric push rods 403 disposed on one working surface of the storage box 401; the telescopic ends of the electric push rods 403 are connected to the telescopic rods 404, and the telescopic rods 404 are connected to the telescopic protective plate 402 through multiple connectors 405. In use, the user starts the electric push rods 403 through the vehicle control system, and the electric push rods 403 drive the telescopic rods 404 to extend and retract, thereby causing the telescopic protective plate 402 to move accordingly; the telescopic protective plate 402 has a honeycomb energy-absorbing layer 406 on the side facing the wireless charging receiver assembly 5. The honeycomb energy-absorbing layer 406 is used to absorb impact energy through structural deformation when the telescopic protective plate 402 is hit from the bottom. The honeycomb energy-absorbing layer 406 is bonded to the surface of each telescopic protective plate 402 with epoxy resin structural adhesive and is made of aluminum honeycomb core material. The unit has a regular hexagonal structure with a honeycomb wall thickness of 0.1 mm and a side-to-side distance of 6 mm. The aluminum honeycomb structure has extremely high specific strength and specific energy absorption. When subjected to impact load, the honeycomb wall will undergo progressive plastic buckling deformation, which can absorb a large amount of impact energy. The load is stable during the deformation process and no instantaneous impact force is generated. When the telescopic protective plate 402 is impacted from bottom to top, the outer telescopic plate first bears the load, and then squeezes the inner honeycomb energy-absorbing layer. Through the plastic deformation of the honeycomb structure, most of the impact energy is absorbed, which greatly reduces the impact force transmitted into the cavity and effectively protects the receiving end component stored inside. The two telescopic protective plates 402 are symmetrically arranged on the left and right sides and open and close opposite each other along the center line of the bottom opening of the vehicle body 7. The telescopic protective plate 402 is 1 / 2 of the working size of the bottom opening of the vehicle body 7. The two telescopic protective plates 402 are provided with magnetic attraction components on opposite sides. When the two telescopic protective plates 402 are close to each other, they are attracted to each other by the magnetic attraction components and form a tight connection.

[0033] Working principle: In the non-charging state, the wireless charging receiver assembly 5 is completely retracted into the closed space composed of the mounting plate 1, the support frame 207 and the protective mechanism 4. At this time, the two telescopic protective plates 402 are tightly attracted to each other by magnetic attraction to form a fully enclosed protective space, which effectively isolates the erosion of external environment such as road mud, sand, gravel, ice and snow, and avoids possible scratches during daily driving.

[0034] When the vehicle needs to be wirelessly charged, the drive mechanism 2 works, and the output end of the drive motor 201 drives the ball screw transmission assembly 204 to rotate. The rotation of the ball screw transmission assembly 204 will convert the rotational motion of the drive motor 201 into the vertical linear motion of the connecting block 205 along the guide post 206. One side of the connecting block 205 is connected to the support frame 207, which in turn drives the support frame 207 and the wireless charging receiver assembly 5 installed in the support frame 207 to move vertically downward, so that the wireless charging receiver assembly 5 reaches the appropriate charging position.

[0035] During the movement of the wireless charging receiver assembly 5 or when subjected to a vertical impact, the low-stiffness second buffer spring 305 deforms first under small to medium impacts, while the high-stiffness first buffer spring 304 intervenes to bear the load under large impacts, achieving progressive buffering and energy absorption. This ensures both the transmission rigidity and positional accuracy during normal lifting and lowering, and effectively absorbs impact energy during impacts, converting rigid impacts into elastic buffers. This prevents the impact force from directly damaging precision transmission components such as ball screws and drive motors, while also protecting fragile components such as coils and magnetic cores inside the receiver.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A collision-resistant wireless charging receiver protection structure integrated into a vehicle chassis, characterized in that: include: A mounting plate (1) symmetrically fixedly installed on the inner side of the chassis battery under guard plate of the vehicle body (7), a drive mechanism (2) located on the opposite side of the mounting plate (1), and a wireless charging receiver assembly (5) connected to the drive mechanism (2). One end of the drive mechanism (2) is connected to the support frame (207), and one end of the inner side of the support frame (207) is in contact with the wireless charging receiver assembly (5) through the spring buffer anti-collision mechanism (3); the other end is in direct contact with the wireless charging receiver assembly (5). The spring buffer anti-collision mechanism (3) is used to absorb impact energy by elastic deformation when the wireless charging receiver assembly (5) is subjected to vertical impact and the drive mechanism (2) is in operation.

2. The anti-collision wireless charging receiver protection structure integrated into the vehicle chassis according to claim 1, characterized in that: The bottom working surface of the mounting plate (1) is provided with a protective mechanism (4), which is flush with the chassis of the vehicle body (7) and is used to protect the wireless charging receiver assembly (5) when it is not in operation.

3. The anti-collision wireless charging receiver protection structure integrated into the vehicle chassis according to claim 1, characterized in that: The drive mechanism (2) includes: a drive motor (201), a ball screw transmission assembly (204) connected to the output end of the drive motor (201), and a connecting block (205) connected to the ball screw transmission assembly (204). The drive motor (201) is mounted on one side of the upper part of the mounting plate (1) via the mounting base (202); The ball screw drive assembly (204) is rotatably connected to the support plate (203). The support plate (203) is horizontally fixed to the mounting plate (1), and guide posts (206) are provided on both sides of the bottom end. The guide posts (206) are slidably connected to the connecting block (205). The connecting block (205) is connected to the support frame (207) on one side, and is used to drive the wireless charging receiver assembly (5) to make a linear reciprocating motion along the vertical direction.

4. The anti-collision wireless charging receiver protection structure integrated into the vehicle chassis according to claim 1, characterized in that: The spring buffer anti-collision mechanism (3) includes: a horizontal plate (302) and an upper support plate (303) connected to each other by a first buffer spring (304), and a lower support plate (306) connected to the upper support plate (303) by a second buffer spring (305). One side of the horizontal plate (302) is connected to the support frame (207) via a fixing plate (301); The working surface on one side of the lower support plate (306) has a preset anti-slip texture and is in contact with the top working surface of the wireless charging receiver assembly (5).

5. The anti-collision wireless charging receiver protection structure integrated into the vehicle chassis according to claim 2, characterized in that: The protective mechanism (4) includes: a storage box (401) with the bottom of the mounting plate (1), a telescopic protective plate (402) inside the storage box (401), and two electric push rods (403) on one end of the working surface of the storage box (401). The telescopic end of the electric push rod (403) is connected to the telescopic rod (404), and the telescopic rod (404) is connected to the telescopic protective plate (402) through multiple connectors (405); The telescopic protective plate (402) is provided with a honeycomb energy-absorbing layer (406) on the side facing the wireless charging receiver assembly (5). The honeycomb energy-absorbing layer (406) is used to absorb impact energy through structural deformation when the telescopic protective plate (402) is hit from the bottom.

6. The anti-collision wireless charging receiver protection structure integrated into the vehicle chassis according to claim 5, characterized in that: The two telescopic protective plates (402) are symmetrically arranged on the left and right, and open and close opposite each other along the center line of the bottom opening of the vehicle body (7).

7. The anti-collision wireless charging receiver protection structure integrated into the vehicle chassis according to claim 6, characterized in that: The telescopic protective plate (402) is 1 / 2 of the working size of the bottom opening of the vehicle body (7).

8. The anti-collision wireless charging receiver protection structure integrated into the vehicle chassis according to claim 1, characterized in that: The mounting base (202) is provided with an electromagnetic shielding aluminum plate (6) at its top. The electromagnetic shielding aluminum plate (6) is used to suppress the electromagnetic field generated by the wireless charging receiver assembly (5).

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