Wireless transmitting coil device with anti-pollution mobile assembly and wireless charger

Abstract

The invention discloses a wireless transmitting coil device with an anti-pollution moving assembly and a wireless charger, and relates to the wireless charging technology of electric automobiles, the key points of the technical scheme are that the wireless transmitting coil device comprises a transmitting coil assembly, a coil support, a driving assembly and the anti-pollution moving assembly, the transmitting coil assembly is arranged on the coil support, the driving assembly is arranged on the coil support, and the anti-pollution moving assembly is arranged on the driving assembly. The driving assembly is used for driving the transmitting coil assembly to move along a preset track so as to realize accurate alignment with a vehicle-mounted receiving coil; the anti-pollution moving assembly is used for supporting the transmitting coil assembly and providing stable sliding support. By adopting the multi-bearing antifouling design, the lubrication maintenance problem of a traditional guide rail system is avoided, the labor cost and the maintenance frequency are reduced, meanwhile, invasion of external pollutants can be effectively resisted, and the service life of the system is prolonged.

Description

Technical Field

[0001] The present invention relates to a wireless charging technology for electric vehicles, and in particular to a wireless transmitting coil device with an anti-pollution mobile component and a wireless charger. Background Art

[0002] With growing global environmental awareness and the promotion of new energy policies, the electric vehicle industry is experiencing rapid growth. As one of the key technologies driving the widespread adoption of electric vehicles, wireless charging is gaining increasing attention for its convenience, safety, and user-friendliness. Compared to traditional wired charging methods, wireless charging effectively avoids physical wear and tear on charging ports, poor electrical contact, and the safety hazards of operating in inclement weather.

[0003] Current wireless chargers for electric vehicles utilize electromagnetic induction, transmitting power through magnetic field coupling between a transmitting coil and an onboard receiving coil. To ensure efficient charging, the two coils must maintain a precise positional relationship. Existing systems use mechanical devices such as guides or slides to drive the transmitting coil, achieving precise alignment between the transmitting coil and the onboard receiving coil. However, guide rail systems face significant challenges in practical applications: they are prone to accumulation of contaminants such as dust and sand, which impair sliding performance; contact with external corrosive substances causes abrasion, increasing sliding resistance and reducing positioning accuracy; and contact with external contaminants exacerbates wear and shortens service life. Traditional guide rails require regular lubrication and maintenance, but frequent maintenance is difficult for charging equipment deployed in public areas, increasing labor costs. Lubricant properties change at low temperatures, and leaks can pollute the environment. Furthermore, guide rail systems suffer from high noise levels, high energy consumption, and poor environmental adaptability. Thermal expansion and contraction due to temperature fluctuations further impact stability. These technical bottlenecks severely hinder the commercial application of wireless charging technology. Summary of the Invention

[0004] In response to the problems existing in the prior art, the first object of the present invention is to provide a wireless transmitting coil device with an anti-fouling moving component, which is characterized by a multi-bearing anti-fouling design and does not require traditional guide rail lubrication and maintenance.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is: a wireless transmitting coil device with an anti-pollution mobile component, comprising a transmitting coil assembly, a coil bracket, a driving assembly and an anti-pollution mobile component, wherein the transmitting coil assembly is arranged on the coil bracket, wherein the transmitting coil assembly is used to transmit wireless power to the vehicle-mounted receiving coil, the coil bracket is connected to the base of the wireless charger, and the driving assembly is used to drive the transmitting coil assembly to move along a preset trajectory to achieve precise alignment of the transmitting coil and the vehicle-mounted receiving coil; the driving assembly includes a motor and a transmission device; the anti-pollution mobile component is used to support the transmitting coil assembly and provide smooth sliding support.

[0006] Preferably, the transmitting coil assembly includes a transmitting coil, a coil housing and a coil connector. The coil housing covers the transmitting coil and is connected to the coil bracket. The coil connector connects the transmitting coil to the power supply of the wireless charger.

[0007] Preferably, the anti-fouling moving assembly includes a supporting moving bearing and a first fixing member. The supporting moving bearing is arranged on the coil bracket. The first fixing member fixes the supporting moving bearing on the coil bracket. The supporting moving bearing is used to support the sliding of the transmitting coil assembly.

[0008] Preferably, the anti-fouling movable assembly further includes a position-limiting movable bearing and a second fixing member, wherein the position-limiting movable bearing is arranged on the coil bracket, and the second fixing member fixes the position-limiting movable bearing on the coil bracket, and the position-limiting movable bearing is used to limit the sliding range of the transmitting coil assembly and ensure smooth sliding of the transmitting coil assembly.

[0009] Preferably, the supporting movable bearing and the limiting movable bearing are both self-lubricating and anti-fouling bearings.

[0010] Preferably, the transmission device of the driving assembly includes a rack and a gear, and the motor drives the rack to move through the gear, thereby driving the transmitting coil assembly to slide along a preset track.

[0011] Preferably, an anti-fouling cavity is provided between the transmitting coil assembly and the coil support, and the transmission devices of the anti-fouling moving assembly and the driving assembly are both provided in the anti-fouling cavity.

[0012] Preferably, the device further includes a proximity switch and a trigger member, wherein the proximity switch is arranged at a preset position of the coil bracket, and the trigger member is arranged on the coil housing of the transmitting coil assembly. When the transmitting coil assembly moves to a preset position, the distance between the trigger member and the proximity switch is less than a preset value, the proximity switch is triggered, and the driving assembly stops moving.

[0013] A second object of the present invention is to provide a wireless charger with an anti-fouling mobile component, which is characterized by adopting the same multi-bearing anti-fouling design as the wireless transmitting coil device.

[0014] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a wireless charger with an anti-fouling mobile component, comprising the wireless transmitting coil device and a base as described above, wherein the wireless transmitting coil device is arranged on the base.

[0015] Preferably, it further comprises a lifting device, which is arranged between the base and the wireless transmitting coil device.

[0016] The beneficial effects of the present invention are as follows: a wireless transmitting coil device and a wireless charger with an anti-fouling mobile component provided by the present invention have the following advantages in comparison: by adopting a multi-bearing anti-fouling design, the lubrication and maintenance problems of the traditional guide rail system are avoided, labor costs and maintenance frequency are reduced, and at the same time, the invasion of external pollutants can be effectively resisted, thereby extending the service life of the system; the anti-fouling cavity design further isolates the transmitting coil component from direct contact with the external environment, thereby improving the reliability and stability of the system; and by adopting a combination of a proximity switch and a trigger component, an automatic stop function of the transmitting coil component is realized, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the wireless transmitting coil device of Example 1;

[0018] Figure 2 This is a schematic structural diagram of a wireless charger according to Example 2;

[0019] Figure 3 This is a schematic diagram showing the structure of the proximity switch and the trigger member of Example 1.

[0020] Figure numerals: 1. Transmitting coil assembly; 11. Transmitting coil; 12. Coil housing; 14. First protrusion; 15. Second protrusion; 2. Coil bracket; 21. Bracket base; 22. Bracket side wall; 23. First groove; 31. Motor; 321. Rack; 322. Gear; 41. Support movable bearing; 42. Limit movable bearing; 43. First fixing member; 44. Second fixing member; 5. Anti-fouling cavity; 6. Proximity switch; 7. Trigger; 8. Base; 9. Lifting device; 10. Protective cover. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings. It should be noted that the words "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the drawings, and the words "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0024] To achieve efficient energy transmission, current mainstream wireless charging systems for electric vehicles generally use the principle of electromagnetic induction. This wireless transmission of electrical energy is achieved by forming a strong magnetic field coupling between a transmitting coil buried in the ground and a receiving coil installed on the bottom of the vehicle. To maximize charging efficiency and reduce electromagnetic radiation, a precise spatial positional relationship must be maintained between the transmitting coil and the receiving coil. To achieve precise alignment requirements, existing wireless charging systems typically install mechanical guides such as rails or slides on the charger, using a motor to drive the transmitting coil along a preset track to achieve precise alignment with the on-board receiving coil. This rail-based mobile system can provide good positioning accuracy and repeatability in an ideal laboratory environment.

[0025] However, these guide rail or slide rail systems face significant challenges in practical outdoor applications. First, guide rails exposed to the elements for extended periods of time are prone to accumulating contaminants such as dust, sand, and leaves. This is especially true after rain or snow, when contaminants mix with moisture to form sludge, which can severely impact the rail's smoothness and sliding performance. Second, airborne particulate matter and corrosive substances can abrasively erode the rail surface, increasing sliding resistance and reducing positioning accuracy. More seriously, these contaminants can exacerbate wear between the rail and the slide, shortening the system's service life. Traditional guide rail systems require regular lubrication and replacement to ensure proper operation. This maintenance requirement is impractical for wireless charging applications in electric vehicles for several reasons: First, wireless charging equipment is often deployed in public parking lots, commercial centers, and residential communities, where frequent maintenance can disrupt normal operation. Second, lubricant addition requires specialized technicians, increasing labor costs. Third, in low-temperature environments, changes in lubricant viscosity can affect system performance. Finally, lubricant leakage can pollute the environment, contradicting the concept of environmental sustainability. Furthermore, traditional guide rail systems suffer from high noise levels, high energy consumption, and poor environmental adaptability. Thermal expansion and contraction due to temperature fluctuations further impact stability. These technical bottlenecks have severely hampered the large-scale commercial application of wireless charging technology for electric vehicles.

[0026] In response to the problems existing in the prior art, the present invention provides a wireless transmitting coil device and a wireless charger with an anti-fouling mobile component, which are arranged on the wireless charger of an electric vehicle. The device is characterized by a multi-bearing anti-fouling design and does not require traditional guide rail lubrication and maintenance.

[0027] Example 1: A wireless transmitting coil device with an anti-pollution mobile component, comprising a transmitting coil component, a coil support, a driving component and an anti-pollution mobile component, wherein the transmitting coil component is arranged on the coil support,

[0028] The transmitting coil assembly is used to provide wireless power transmission to the vehicle-mounted receiving coil.

[0029] The coil bracket is connected to the base of the wireless charger.

[0030] The drive assembly is used to drive the transmitting coil assembly to move along a preset trajectory to achieve precise alignment between the transmitting coil and the vehicle-mounted receiving coil; the drive assembly includes a motor and a transmission device.

[0031] The anti-fouling moving assembly is used to support the transmit coil assembly and provide smooth sliding support.

[0032] An anti-pollution cavity is provided between the transmitting coil assembly and the coil support, and the transmission devices of the anti-pollution moving assembly and the driving assembly are both provided in the anti-pollution cavity.

[0033] The transmitting coil assembly includes a transmitting coil, a coil housing, and a coil connector. The transmitting coil generates an electromagnetic field to enable wireless charging. The coil housing protects and provides mechanical support for the transmitting coil. The coil connector connects to the wireless charger's power source. Specifically, the transmitting coil of the transmitting coil assembly is fixedly connected to the coil housing. One end of the coil connector connects to the transmitting coil, while the other end passes through the coil housing and connects to the wireless charger's power source to enable power transmission.

[0034] The above-mentioned coil bracket includes: a bracket base and a bracket side wall. The bracket base is arranged below the transmitting coil assembly, and the bracket side wall is arranged on both sides of the transmitting coil assembly perpendicular to the preset track, which is used to limit the movement range of the transmitting coil assembly and provide mechanical stability.

[0035] In the above-mentioned drive assembly, the motor is used to provide power, and the transmission device converts the rotational motion of the motor into the linear motion of the transmitting coil assembly.

[0036] In one specific embodiment, the transmission device includes a gear and a rack, wherein the rack is disposed below the transmitting coil assembly and fixedly connected thereto. Specifically, the rack is disposed below and fixedly connected to the coil housing. The gear is connected to a motor, which drives the rack via the gear. Specifically, the motor rotates the gear, driving the rack along a predetermined track of the coil support, thereby driving the transmitting coil assembly, which is fixedly connected to the rack, along the predetermined track.

[0037] The anti-fouling mobile assembly includes at least two supporting bearings and at least two limiting bearings. The supporting bearings are positioned below the transmitting coil assembly and are used to support the transmitting coil assembly and provide smooth sliding support. The limiting bearings are positioned on either side of the transmitting coil assembly to limit the range of movement of the transmitting coil assembly and provide stable support. The supporting bearings are connected to the support base of the coil holder, while the limiting bearings are connected to the side walls of the coil holder. Specifically, the supporting bearings are secured to the support base of the coil holder via bolts. The supporting bearings are then secured below the transmitting coil assembly via a first fixing member, specifically bolted to the support base of the coil holder. In one specific embodiment, the first fixing member may be a pin or a bushing, depending on the design requirements and actual application scenario, to ensure a stable connection between the supporting bearings and the support base, and to ensure that the transmitting coil assembly can slide smoothly via the supporting bearings.

[0038] The limited motion bearing secures both sides of the transmitting coil assembly via a second fixing member. Specifically, the limited motion bearing is bolted to the sidewalls of the coil support. In one embodiment, the second fixing member may be a bolt or a pin, depending on the design requirements and actual application scenario, to ensure a stable connection between the limited motion bearing and the sidewalls of the support, and to effectively limit the range of movement of the transmitting coil assembly.

[0039] Both the supporting and limiting bearings utilize self-lubricating, anti-fouling bearings. These bearings effectively prevent contaminants such as dust and sand from entering the bearings during the movement of the transmitting coil assembly, thereby reducing friction and extending service life. Furthermore, the anti-fouling bearings' sealed design prevents lubricant leakage, requiring virtually no maintenance. These bearings are suitable for long-term use in electric vehicle wireless chargers and maintain excellent performance in a variety of harsh environments.

[0040] Preferably, the coil housing and coil support are both designed with a special-shaped structure to form an anti-fouling cavity between the coil housing and the coil support. The anti-fouling movable assembly and transmission device are both disposed within this anti-fouling cavity. This anti-fouling cavity effectively prevents external contaminants from entering during the movement of the transmitting coil assembly, which could affect the normal operation of the anti-fouling movable assembly and transmission device within the cavity. Furthermore, the anti-fouling cavity design reduces frictional resistance during the movement of the transmitting coil assembly, thereby improving the overall system's operating efficiency.

[0041] Specifically, a first protrusion is provided on one side of the coil housing, and a first groove is provided on the side wall of the coil bracket close to the first protrusion. The first protrusion cooperates with the first groove to close the opening on one side of the upper end of the anti-fouling cavity on that side. A second protrusion is provided on the other side of the coil housing, and the second protrusion cooperates with the base of the wireless charger to close the opening on the other side of the upper end of the anti-fouling cavity on that side. The design of the above-mentioned anti-fouling cavity can effectively prevent external contaminants from entering during the movement of the transmitting coil assembly, thereby affecting the normal operation of the anti-fouling moving assembly and the transmission device in the cavity. At the same time, the design of the anti-fouling cavity can also reduce the frictional resistance of the transmitting coil assembly caused by dirt during the movement, thereby improving the operating efficiency of the overall system.

[0042] Preferably, this embodiment further includes a proximity switch and a trigger member. The proximity switch is disposed at a preset position of the coil support, and the trigger member is disposed on the coil housing of the transmitting coil assembly. The proximity switch and the trigger member are disposed in correspondence with each other, so that when the wireless transmitting coil assembly moves to a preset position, the distance between the trigger member and the proximity switch is less than a preset value, the proximity switch is triggered, and the drive assembly stops moving. The proximity switch is used to detect the position of the wireless transmitting coil assembly and trigger a stop signal when it moves to a preset position, thereby avoiding overshoot or misalignment caused by the drive assembly continuing to operate when the transmitting coil assembly moves to the preset position. The proximity switch can be a photoelectric switch, a magnetic switch, or other type of proximity switch, as long as it can be triggered when the distance between the trigger member and the proximity switch is less than a preset value.

[0043] The technical solutions in the embodiments will be described clearly and completely below with reference to the accompanying drawings.

[0044] Figure 1-Figure 2 The structure of the wireless transmitting coil device of this embodiment is shown. For the convenience of explanation, the forward and backward directions of the transmitting coil assembly of this embodiment are defined as right and left directions below.

[0045] like Figure 1As shown, the transmitting coil assembly 1 includes a transmitting coil 11, a coil housing 12, and a coil connector. The transmitting coil 11 is used to generate an electromagnetic field to achieve wireless charging. The coil housing 12 is used to protect and provide mechanical support for the transmitting coil 11. The coil connector is used to connect to the power supply of the wireless charger. The transmitting coil 11 of the transmitting coil assembly 1 is fixedly connected to the coil housing 12. One end of the coil connector is connected to the transmitting coil 11, and the other end passes through the coil housing 12 and is connected to an external power supply to achieve power transmission.

[0046] Coil bracket 2 includes a bracket base 21 and bracket sidewalls 22. Base 21 is positioned below transmitting coil assembly 1, while sidewalls 22 are positioned at the front and rear of transmitting coil assembly 1 to limit its range of motion and provide mechanical stability. Base 21 connects to the base of the wireless charger, while sidewalls 22 connect to the base of the wireless charger to ensure the stability of transmitting coil assembly 1 during movement.

[0047] like Figure 1 As shown, the drive assembly includes a motor 31 and a transmission device, which includes a rack 321 and a gear 322. The rack 321 is disposed below the transmitting coil assembly 1 and is fixedly connected to the transmitting coil assembly 1. Specifically, the rack 321 is disposed below the coil housing 12 and is fixedly connected to the coil housing 12. The gear 322 is connected to the motor 31. The rotation of the gear 322 drives the rack 321 to move along the preset track of the coil support 2, thereby driving the transmitting coil assembly 1 fixedly connected to the rack 321 to move along the preset track.

[0048] The anti-fouling movable assembly includes a supporting movable bearing 41 and a limiting movable bearing 42. The supporting movable bearing 41 is disposed below the transmitting coil assembly 1, while the limiting movable bearing 42 is disposed at the front and rear sides of the transmitting coil assembly 1. The supporting movable bearing 41 is used to support the transmitting coil assembly 1 and provide smooth sliding support, while the limiting movable bearing 42 is used to limit the range of movement of the transmitting coil assembly 1. Specifically, the supporting movable bearing 41 is fixed to the support base 21 of the coil support 2 via a first fixing member 43, while the limiting movable bearing 42 is fixed to the front and rear sides of the transmitting coil assembly 1 via a second fixing member 44.

[0049] The limited movement bearing 42 is fixed to the bracket side wall 22 through the second fixing member 44. The axial direction of the limited movement bearing 42 is perpendicular to the movement direction of the transmitting coil assembly 1. The limited movement bearing 42 is provided on the bracket side walls 22 on both sides of the transmitting coil assembly 1 to limit the movement range of the transmitting coil assembly 1 and ensure smooth sliding of the transmitting coil assembly 1.

[0050] like Figure 3As shown, an anti-fouling cavity 5 is defined between the coil housing 12 and the coil support 2. The transmission mechanism of the anti-fouling moving assembly and the drive assembly are both located within this anti-fouling cavity 5. A first protrusion 14 is provided on one side of the coil housing 12, and a first groove 23 is provided on the sidewall of the coil support 2 near the first protrusion 14. The first protrusion 14 cooperates with the first groove 23 to close one side of the upper end of the anti-fouling cavity 5 on this side. A second protrusion 15 is provided on the other side of the coil housing 12. The second protrusion 15 connects to the base 8 of the wireless charger to close the other side of the upper end of the anti-fouling cavity 5 on this side.

[0051] like Figure 1-Figure 2 As shown, the system also includes a proximity switch 6 and a trigger element 7. The proximity switch 6 is positioned at a preset position on the coil support 2, and the trigger element 7 is mounted on the coil housing 12 of the transmitting coil assembly 1. The proximity switch 6 and trigger element 7 are positioned in correspondence, so that when the wireless transmitting coil assembly 1 moves to a preset position, the distance between the trigger element 7 and the proximity switch 6 falls below a preset value, triggering the proximity switch 6 and thereby stopping the movement of the drive assembly. The proximity switch 6 detects the position of the wireless transmitting coil assembly 1 and triggers a stop signal when it moves to the preset position, ensuring that the wireless transmitting coil assembly 1 can accurately align with the onboard receiving coil for charging. As shown, the proximity switch 7 is positioned in the center of the side wall of the coil support 2. The coil housing is equipped with two trigger elements 7, one on the left and one on the right. When the proximity switch approaches either trigger element, the proximity switch is triggered, halting the movement of the transmitting coil assembly 1. This design improves system reliability and flexibility, preventing overshoot or misalignment caused by the driver assembly continuing to operate while the transmitting coil assembly 1 moves to the preset position.

[0052] Example 2: A wireless charger with an anti-fouling mobile component, comprising a base and the wireless transmitting coil device of Example 1, wherein the wireless transmitting coil device is arranged on the base.

[0053] In a specific embodiment, Figure 2 As shown, a lifting device 9 is provided between the base 8 and the wireless transmitting coil device. The lifting device is used to adjust the height of the wireless transmitting coil device to adapt to the position of the receiving coil of different vehicle models.

[0054] Preferably, if Figure 2 As shown, a protective cover 10 is further provided outside the lifting device 9. The upper end of the protective cover 10 is connected to the wireless transmitting coil device. Specifically, the upper end of the protective cover 10 is connected to the coil support 2, and the lower end of the protective cover 10 is connected to the base 8. The above-mentioned protective cover is used to prevent external contaminants from entering the base and affecting the normal operation of the lifting device.

[0055] In summary, this embodiment provides a wireless transmitting coil device and a wireless charger with an anti-fouling mobile structure, which adopts a multi-bearing anti-fouling design and does not require traditional guide rail lubrication and maintenance. By providing an anti-fouling cavity, an anti-fouling mobile component, etc., it is possible to effectively prevent pollutants from entering the interior of the wireless transmitting coil device, ensure its normal operation, and improve charging efficiency. At the same time, the design of the anti-fouling bearing can effectively reduce frictional resistance and extend the service life during the movement of the transmitting coil component. In addition, the setting of the proximity switch can accurately control the moving position of the transmitting coil component, avoid overshoot or misalignment problems, and improve the reliability and safety of the system. The design of this wireless charger can adapt to various harsh environments, meet the actual needs of wireless charging of electric vehicles, and has broad application prospects.

[0056] It should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the scope of the technical solutions of the present invention, and all such modifications or equivalents should be included in the scope of the claims of the present invention.

Claims

1. A wireless transmitting coil device with an anti-fouling mobile component, characterized in that: It includes a transmitting coil assembly, a coil support, a driving assembly and an anti-pollution moving assembly. The transmitting coil assembly is arranged on the coil support, wherein: The transmitting coil assembly is used to transmit wireless energy to the vehicle-mounted receiving coil, and the coil bracket is connected to the base of the wireless charger. The driving assembly is used to drive the transmitting coil assembly to move along a preset trajectory to achieve precise alignment between the transmitting coil and the vehicle-mounted receiving coil; the driving assembly includes a motor and a transmission device; The anti-fouling moving assembly is used to support the transmitting coil assembly and provide smooth sliding support.

2. The wireless transmitting coil device according to claim 1, wherein: The transmitting coil assembly includes a transmitting coil, a coil housing, and a coil connector. The coil housing covers the transmitting coil and is connected to the coil bracket. The coil connector connects the transmitting coil to the power supply of the wireless charger.

3. The wireless transmitting coil device according to claim 1, wherein: The anti-fouling moving assembly includes a supporting moving bearing and a first fixing member. The supporting moving bearing is arranged on the coil bracket. The first fixing member fixes the supporting moving bearing on the coil bracket. The supporting moving bearing is used to support the sliding of the transmitting coil assembly.

4. The wireless transmitting coil device according to claim 3, wherein: The anti-fouling moving assembly also includes a limited moving bearing and a second fixing piece. The limited moving bearing is arranged on the coil bracket. The second fixing piece fixes the limited moving bearing on the coil bracket. The limited moving bearing is used to limit the sliding range of the transmitting coil assembly and ensure smooth sliding of the transmitting coil assembly.

5. The wireless transmitting coil device according to claim 4, wherein: The supporting movable bearing and the limiting movable bearing are both self-lubricating and anti-fouling bearings.

6. The wireless transmitting coil device according to claim 1, wherein: The transmission device of the driving assembly includes a rack and a gear. The motor drives the rack to move through the gear, driving the transmitting coil assembly to slide along a preset track.

7. The wireless transmitting coil device according to claim 2, wherein: An anti-pollution cavity is provided between the transmitting coil assembly and the coil support, and the transmission devices of the anti-pollution moving assembly and the driving assembly are both provided in the anti-pollution cavity.

8. The wireless transmitting coil device according to claim 2, wherein: It also includes a proximity switch and a trigger member. The proximity switch is set at a preset position of the coil bracket, and the trigger member is set on the coil shell of the transmitting coil assembly. When the transmitting coil assembly moves to a preset position, the distance between the trigger member and the proximity switch is less than a preset value, the proximity switch is triggered, and the driving assembly stops moving.

9. A wireless charger with an anti-fouling mobile component, characterized in that: The invention comprises a wireless transmitting coil device and a base according to any one of claims 1 to 8, wherein the wireless transmitting coil device is arranged on the base.

10. The wireless charger according to claim 9, wherein: It also includes a lifting device, which is arranged between the base and the wireless transmitting coil device.

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