A wireless charging device for an electric bicycle and its position adjustment method

Abstract

The present application provides a wireless charging device for an electric bicycle and a position adjustment method thereof, which are used to solve the problems that the operation steps are complex when the transmitting end of the existing wireless charging device for an electric bicycle is aligned with the receiving ends at various installation positions, and the alignment accuracy is low. The device includes a transmitting end, a receiving end and an XZ sliding table module. The transmitting end is installed on the sliding end of the XZ sliding table module; the receiving end is installed on the frame on one side of the wheel of the electric bicycle. A limiting block is arranged on one side of the XZ sliding table module, and an arc-shaped limiting groove is formed in the limiting block. During charging, the wheel at one end of the electric bicycle where the receiving end is installed is placed in the arc-shaped limiting groove. The present application realizes the Y-direction alignment between the transmitting end and the receiving end by setting the arc-shaped limiting groove, and adjusts the positions of the transmitting end in the X direction and the Y direction through the XZ sliding table module, so as to realize the alignment between the transmitting end and the receiving end in the X direction and the Y direction. The operation steps are simple, and the alignment accuracy between the transmitting end and the receiving end is improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless power transmission, and particularly to a wireless charging device for an electric bicycle and a method for adjusting its position. Background Art

[0002] The charging methods of existing electric bicycles can be divided into two types: wired and wireless. Traditional electric bicycles mostly adopt the wired charging method. Electric bicycles are charged outdoors or in semi-open sheds. The traditional wired charging method is easily affected by outdoor rain, and at the same time, the messy charging cables are extremely likely to cause safety hazards such as fires.

[0003] In recent years, with the development of wireless charging technology, wireless charging devices for electric bicycles have been widely used. The wireless charging device for an electric bicycle transmits electric energy through the coupling between the transmitting end and the receiving end. This transmission method does not require plugging in a charging cable and has high safety. However, during charging, the transmitting end and the receiving end need to be directly opposite to maximize the transmission power. However, due to the differences in the frame width and height of electric bicycles produced by each manufacturer, the position of the receiving end on the frame is somewhat different. During charging, it is difficult for the transmitting end and the receiving end to achieve alignment in three directions. To solve the above problems, wireless charging devices with position adjustment functions have been applied to the field of wireless charging of electric bicycles. However, most existing wireless devices for electric bicycles use power detection or image recognition methods to adjust their positions. When using power detection, multiple positions need to be tried to obtain the position with the maximum transmission power, and then this position is determined as the directly opposite position; while for position adjustment using image recognition technology, it is necessary to collect and process the picture information of the transmitting end and the receiving end, which has a large amount of calculation and high requirements for the software and hardware of the control system. That is, the operation steps are complex when the transmitting end of the existing wireless charging device for an electric bicycle is aligned with the receiving ends at various installation positions, and the alignment difficulty and accuracy are low. Summary of the Invention

[0004] The purpose of the present invention is to provide a wireless charging device for an electric bicycle and a method for adjusting its position. It is used to solve the technical problems that the operation steps are complex when the transmitting end of the existing wireless charging device for an electric bicycle is aligned with the receiving ends at various installation positions, and the alignment difficulty and accuracy are low.

[0005] A wireless charging device for an electric bicycle includes a transmitting end and a receiving end, and is characterized in that it further includes an XZ sliding table module, and the transmitting end is installed on the sliding end of the XZ sliding table module;

[0006] The receiving end is installed on the frame on one side of the wheel of the electric bicycle. A limiting block is arranged on one side of the XZ sliding table module, and an arc-shaped limiting groove is formed on the limiting block. During charging, the wheel at the end of the electric bicycle where the receiving end is installed is placed in the arc-shaped limiting groove.

[0007] Optionally, the XZ slide table module includes a channel steel bracket arranged in the vertical direction. A first slide rail is installed on the end face of the channel steel bracket. A first guide rail slider is slidably arranged on the first slide rail. The transmitting end is installed on the first guide rail slider.

[0008] A first screw rod is installed in the groove of the channel steel bracket. The axial direction of the first screw rod is the same as the length direction of the first slide rail. A first threaded slider is threadedly connected to the first screw rod. A first avoidance groove is formed on the end face of the channel steel bracket. The upper end of the first threaded slider passes through the first avoidance groove and is connected to the first guide rail slider. A first motor is also installed in the groove of the channel steel bracket. The power output shaft of the first motor is connected to one end of the first screw rod.

[0009] Optionally, the bottom end of the channel steel bracket is installed on a support block. A second guide rail slider and a second threaded slider are installed at the bottom end of the support block.

[0010] The second guide rail slider is slidably connected to a second slide rail. The second threaded slider is threadedly connected to a second screw rod. The second screw rod is arranged parallel to the second guide rail slider. One end of the second screw rod is connected to a second motor.

[0011] The second screw rod and the second guide rail slider are both installed in a slide table box. The slide table box is used to avoid the second avoidance groove of the channel steel bracket. A motor box is arranged on one side of the slide table box. The second motor is installed in the motor box.

[0012] Optionally, limit plates are further arranged on the limit blocks on both sides of the arc-shaped limit groove.

[0013] Guide chamfer angles for facilitating the pushing-in of the electric bicycle are arranged on the limit blocks at both ends of the arc-shaped limit groove.

[0014] Optionally, the transmitting end includes a first card placing rack and a first housing installed in the first card placing rack.

[0015] A wireless charging transmitting module is installed in the first housing. The input end of the wireless charging transmitting module is connected to a DC power supply. A plurality of first ball bearings are installed on the end face of the first housing. A pressure detection module is installed on the upper side wall of the first card placing rack.

[0016] Optionally, the pressure detection module includes a sleeve with one end open and a push rod with one end slidably arranged in the sleeve.

[0017] A pressure sensor is installed at the bottom end inside the sleeve. A pressure spring is further arranged inside the sleeve between the pressure sensor and the ejector rod. Two ends of the pressure spring are respectively connected to the end face of the ejector rod and the end face of the pressure sensor. The axis of the sleeve is perpendicular to the end face of the first housing. When the pressure spring is in a free state, the front end of the ejector rod extends out of the vertical plane where the end face of the first housing is located.

[0018] Optionally, the number of the pressure detection modules is two groups. The two groups of pressure detection modules are respectively arranged at two ends of the upper side wall of the first card placing rack. A second ball is installed at the front end of the ejector rod.

[0019] Optionally, the receiving end includes a second card placing rack and a second housing installed inside the second card placing rack;

[0020] A wireless charging receiving module is installed inside the second housing. The output end of the wireless charging receiving module is connected to the battery load of the electric bicycle. During charging, the wireless charging receiving module is coupled with the wireless charging transmitting end module for power transmission.

[0021] Optionally, two supporting ears corresponding to the two groups of pressure detection modules are arranged on the upper side wall of the second card placing rack;

[0022] The center line of the second housing in the vertical direction and the central axis of the electric bicycle wheel are located in the same vertical plane. The center line of the first housing in the vertical direction and the center line in the width direction of the arc-shaped limiting groove are located in the same vertical plane.

[0023] A position adjustment method for an electric bicycle wireless charging device is used for adjusting the position of the transmitting end of the above-mentioned electric bicycle wireless charging device. The specific steps are as follows:

[0024] S1: Push the electric bicycle wheel with the transmitting end installed into the arc-shaped limiting groove;

[0025] S2: Start the second motor to drive the channel steel bracket and the transmitting end to move towards the end close to the limiting block. When the pressure of the pressure sensor is equal to the pressure threshold, the first ball is in contact with the end face of the second housing, and the second motor stops;

[0026] S3: Start the first motor to drive the transmitting end to move upward. When the pressure of the pressure sensor is equal to zero, the second ball disengages from the end face of the second housing and the supporting ear, and the first motor stops;

[0027] S4: Start the power supply of the transmitting end. The transmitting end is coupled with the receiving end to charge the load battery of the electric bicycle.

[0028] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0029] 1. When the wheel of the electric bicycle enters the arc-shaped limiting groove and stops stably, the center line in the vertical direction of the receiving end, the center line in the vertical direction of the transmitting end, and the center line in the width direction of the arc-shaped limiting groove must be located in the same vertical plane. The positive alignment adjustment of the transmitting end and the receiving end in the Y direction is realized by setting the arc-shaped limiting groove.

[0030] 2. By collecting the pressure change of the pressure sensor in the pressure detection module, the movement of the XZ sliding table module in the X and Z directions is controlled, so as to realize the positive alignment adjustment of the transmitting end and the receiving end in the X and Z directions. The adjustment process in the X and Z directions only needs to collect the pressure data change of the pressure sensor, and does not require complex operations on the pressure data. The adjustment method is simple and the adjustment accuracy is high.

[0031] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. Brief Description of the Drawings

[0032] The brief description of the drawings of the present invention is as follows.

[0033] Figure 1 It is a schematic structural diagram of the wireless charging device for electric bicycles of the present invention at the initial moment.

[0034] Figure 2 It is a schematic structural diagram of the present invention when the wheel enters the arc-shaped limiting groove and stops stably.

[0035] Figure 3 It is a schematic structural diagram of the present invention when the transmitting end and the receiving end are aligned.

[0036] Figure 4 It is a schematic structural diagram of the XZ sliding table module of the present invention.

[0037] Figure 5 It is a side view of the XZ sliding table module of the present invention.

[0038] Figure 6 It is a schematic structural diagram of the transmitting end of the present invention.

[0039] Figure 7 It is a schematic structural diagram of the receiving end of the present invention.

[0040] Figure 8 It is a schematic structural diagram of the limiting block of the present invention.

[0041] Figure 9 It is a schematic internal structural diagram of the sliding table box and the motor box of the present invention.

[0042] Figure 10 This is a cross-sectional view of the pressure detection module of the present invention.

[0043] In the figure: 1 - transmitting end; 101 - first clamping and placing frame; 102 - first housing; 103 - first ball; 2 - receiving end; 201 - second clamping and placing frame; 202 - second housing; 203 - lug; 3 - XZ sliding table module; 301 - channel steel bracket; 302 - first slide rail; 303 - first guide rail slider; 304 - first screw; 305 - first threaded slider; 306 - first avoidance groove; 307 - first motor; 308 - support block; 309 - second guide rail slider; 310 - second threaded slider; 311 - second slide rail; 312 - second screw; 313 - second motor; 314 - slide table box; 315 - second avoidance groove; 316 - motor box; 401 - electric bicycle wheel; 402 - vehicle frame; 5 - limit block; 501 - arc-shaped limit groove; 502 - limit plate; 503 - guiding bevel; 6 - pressure detection module; 601 - sleeve; 602 - ejector rod; 603 - pressure sensor; 604 - pressure spring; 605 - second ball. Detailed implementation manners

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

[0045] Embodiment 1:

[0046] As Figure 1 、 Figure 2 and Figure 8 shown, a wireless charging device for an electric bicycle includes a transmitting end 1 and a receiving end 2, and is characterized in that it further includes an XZ sliding table module 3, and the transmitting end 1 is installed on the sliding end of the XZ sliding table module 3;

[0047] The receiving end 2 is installed on the vehicle frame 402 on one side of the electric bicycle wheel 401, a limit block 5 is arranged on one side of the XZ sliding table module 1, and an arc-shaped limit groove 501 is formed in the limit block 5. During charging, the wheel 401 at one end of the electric bicycle where the receiving end 2 is installed is clamped in the arc-shaped limit groove 501.

[0048] As Figure 1 、 Figure 6 、 Figure 7 and Figure 10 shown, the transmitting end 1 includes a first clamping and placing frame 101 and a first housing 102 installed in the first clamping and placing frame 101;

[0049] A wireless charging transmitting module is installed inside the first housing 102. The input end of the wireless charging transmitting module is connected to a DC power supply. A plurality of first balls 103 are installed on the end face of the first housing 102. A pressure detection module 6 is installed on the upper side wall of the first clamping and placing rack 101.

[0050] As Figure 1 , Figure 6 , Figure 7 and Figure 10 shown, the receiving end 2 includes a second clamping and placing rack 201 and a second housing 202 installed inside the second clamping and placing rack 201;

[0051] A wireless charging receiving module is installed inside the second housing 202. The output end of the wireless charging receiving module is connected to the battery load of the electric bicycle. During charging, the wireless charging receiving module is coupled with the wireless charging transmitting end module for power transmission. Two lugs 203 corresponding to two groups of pressure detection modules 6 are provided on the upper side wall of the second clamping and placing rack 201.

[0052] In this embodiment, the arc-shaped limiting groove 501 is a groove with a high middle and low ends. During installation, the center line of the second housing 202 in the vertical direction and the central axis of the electric bicycle wheel 401 are located in the same vertical plane, and the center line of the first housing 102 in the vertical direction and the center line of the arc-shaped limiting groove 501 in the width direction are located in the same vertical plane. Through the above installation settings, as Figure 2 shown, when the electric bicycle wheel 401 enters the arc-shaped limiting groove 501 and stops stably, under the action of gravity, the lowest end of the electric bicycle wheel 401 must contact the lowest end of the middle position of the arc-shaped limiting groove 501, and the axis of the electric bicycle wheel 401 must be directly above the center line of the width direction of the arc-shaped limiting groove 501. That is, by setting the arc-shaped limiting groove 501, the alignment of the transmitting end and the receiving end in the Y direction is realized.

[0053] In this embodiment, when the charging personnel push the electric bicycle wheel 401 into the arc-shaped limiting groove 501 and stop stably, the rider clicks the start button of the device control box, and the device control system controls the XZ sliding table module 1 to move to drive the transmitting end to move in the X and Z directions, realizing the alignment of the transmitting end and the receiving end in three directions.

[0054] In this embodiment, the wireless charging transmitting module includes a high-frequency inverter circuit, a primary compensation circuit, and a transmitting coil connected in sequence. The wireless charging receiving module includes a receiving coil, a secondary compensation circuit, and a rectifying and filtering circuit connected in sequence. The transmitting coil and the receiving coil form a coupling mechanism. The high-frequency inverter circuit selects a full-bridge high-frequency inverter, and its input end is connected to a DC power supply. The rectifying and filtering circuit selects a full-bridge rectifier filter, and its output end is connected to the load battery of the electric bicycle. The primary compensation circuit and the secondary compensation circuit select a symmetrically arranged LC network topology.

[0055] As Figure 1 and Figure 8 shown, on the limiting blocks 5 on both sides of the arc-shaped limiting groove 501, a limiting plate 502 is further provided, and on the limiting blocks 5 at both ends of the arc-shaped limiting groove 501, a guiding chamfer 503 for facilitating the pushing-in of the electric bicycle is provided.

[0056] In this embodiment, by providing the limiting plate 502, the wheel width of the electric bicycle is restricted, and for electric bicycles exceeding this width, the transmitting end cannot meet its wireless charging requirements. By providing the guiding chamfer 503, it is convenient for the wheels of the electric bicycle to enter the arc-shaped groove 501.

[0057] As Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9 shown, the XZ sliding table module 3 includes a channel steel bracket 301 arranged in the vertical direction. On the end face of the channel steel bracket 301, a first slide rail 302 is installed. A first guide rail slider 303 is slidably arranged on the first slide rail 302, and the transmitting end 1 is installed on the first guide rail slider 303;

[0058] In the groove of the channel steel bracket 301, a first screw rod 304 is installed. The axis direction of the first screw rod 304 is the same as the length direction of the first slide rail 302. A first threaded slider 305 is threadedly connected to the first screw rod 304. A first avoidance groove 306 is opened on the end face of the channel steel bracket 301. The upper end of the first threaded slider 305 passes through the first avoidance groove 306 and is connected to the first guide rail slider 303. In the groove of the channel steel bracket 301, a first motor 307 is further installed, and the power output shaft of the first motor 307 is connected to one end of the first screw rod 304.

[0059] As Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9As shown, the bottom end of the channel steel bracket 301 is installed on the support block 308, and a second guide rail slider 309 and a second threaded slider 310 are installed at the bottom end of the support block 308;

[0060] The second guide rail slider 309 is slidably connected to the second slide rail 311, the second threaded slider 310 is threadedly connected to the second screw rod 312, the second screw rod 312 is arranged in parallel with the second guide rail slider 309, and one end of the second screw rod 312 is connected to the second motor 313;

[0061] Both the second screw rod 312 and the second guide rail slider 309 are installed in the slide table box 314. The slide table box 314 is used to avoid the second avoidance groove 315 of the channel steel bracket 301. A motor box 316 is arranged on one side of the slide table box 314, and the second motor 313 is installed in the motor box 316.

[0062] As Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 9 As shown, the pressure detection module 6 includes a sleeve 601 with an open end, and a push rod 602 with one end slidably arranged in the sleeve 601;

[0063] A pressure sensor 603 is installed at the bottom end inside the sleeve 601. A pressure spring 604 is further arranged in the sleeve 601 between the pressure sensor 603 and the push rod 602. Two ends of the pressure spring 604 are respectively connected to the end face of the push rod 602 and the end face of the pressure sensor 603. The axis of the sleeve 601 is perpendicular to the end face of the first housing 102. When the pressure spring 604 is in a free state, the front end of the push rod 602 extends out of the vertical plane where the end face of the first housing 102 is located, and a second ball 605 is installed at the front end of the push rod 602.

[0064] In this embodiment, the number of the pressure detection modules 6 is two groups. The two groups of pressure detection modules 6 are respectively arranged at both ends of the upper side wall of the first card placing rack 101, and a second ball 605 is installed at the front end of the push rod 602.

[0065] In this embodiment, as Figure 1 shown, at the initial moment, the transmitting end 1 (the first housing 102 and the first card placing rack 101) is located at the lowest position of its stroke. After the electric bicycle wheel 401 is pushed into the arc-shaped limiting groove 501 and stops stably, the plane where the lower end face of the push rod 602 is located is higher than the plane where the lower end face of the second housing 202 is located (realized by adjusting the vertical installation height of the receiving end 2).

[0066] In this embodiment, the distance that the front end of the ejector rod 602 extends out of the end face of the first housing 102 is set as m (the diameters of the second ball 605 and the first ball 103 are the same, and the heights of the protruding parts from the mounting end face are the same), and the threshold value of the pressure sensor 603 is set as km, where k is the pressure coefficient of the pressure spring 604. After the electric bicycle wheel 401 is pushed into the arc-shaped limiting groove 501 and stops stably, the second motor 313 is started to drive the channel steel bracket 301 and the transmitting end 1 to move towards the end close to the limiting block 5. When the pressure of the pressure sensor 603 is equal to the pressure threshold value, as Figure 2 shown, the first ball 103 is in contact with the end face of the second housing 202, and the second motor 313 stops. At this time, the transmitting end 1 and the receiving end 2 are in contact in the X direction.

[0067] In this embodiment, after the transmitting end 1 and the receiving end 2 are in contact in the X direction, the first motor 307 is started to drive the transmitting end 1 to move upward. When the second ball 605 is separated from the end face of the second housing 202 and the lug 203, the pressure of the pressure sensor 603 is equal to zero, as Figure 3 shown. At this time, the transmitting end 1 and the receiving end 2 are directly opposite in the Z direction; the first motor 307 stops. In this embodiment, both the second ball 605 and the first ball 103 are balls that can rotate freely, and the end face of the second housing 202 is a smooth end face. When the transmitting end 1 moves upward, the second ball 605 and the first ball 103 roll on the second housing 202 to prevent them from directly contacting the transmitting end 1 and causing damage to its surface.

[0068] Embodiment 2:

[0069] A position adjustment method for an electric bicycle wireless charging device is used to realize the adjustment of the position of the transmitting end of an electric bicycle wireless charging device described in Embodiment 1. The specific steps are as follows:

[0070] S1: Push the electric bicycle wheel 401 at the end with the transmitting end installed into the arc-shaped limiting groove 501;

[0071] S2: Start the second motor 313 to drive the channel steel bracket 301 and the transmitting end 1 to move towards the end close to the limiting block 5. When the pressure of the pressure sensor 603 is equal to the pressure threshold value, the first ball 103 is in contact with the end face of the second housing 202, and the second motor 313 stops;

[0072] S3: Start the first motor 307 to drive the transmitting end 1 to move upward. When the pressure of the pressure sensor 603 is equal to zero, the second ball 605 is separated from the end face of the second housing 202 and the lug 203, and the first motor 307 stops;

[0073] S4: Start the power supply of the transmitting end 1. The transmitting end 1 and the receiving end 2 are coupled to charge the load battery of the electric bicycle.

[0074] In this embodiment, the present application controls the movement of the XZ gantry module in the X and Z directions by collecting the pressure changes of the pressure sensor 603 in the pressure detection module 6, so as to realize the alignment adjustment of the transmitting end 1 and the receiving end 2 in the X direction and the Z direction. The adjustment process in the X and Z directions only needs to collect the pressure data changes of the pressure sensor 603, and does not require complex operations on the pressure data. The adjustment method is simple and the adjustment accuracy is high.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A wireless charging device for an electric bicycle, comprising a transmitting end (1) and a receiving end (2), characterized in that: It also includes an XZ slide module (3), wherein the transmitting end (1) is mounted on a sliding end of the XZ slide module (3); The receiving end (2) is mounted on a frame (402) on one side of a wheel (401) of the electric bicycle, a limiting block (5) is provided on one side of the XZ slide module (3), an arc-shaped limiting groove (501) is provided on the limiting block (5), and during charging, the wheel (401) on the electric bicycle with the receiving end (2) mounted on one end is clamped in the arc-shaped limiting groove (501); The XZ slide module (3) comprises a channel steel bracket (301) arranged in a vertical direction, a first motor (307) and a second motor (313); the transmitting end (1) comprises a first card holder (101) and a first shell (102); the receiving end (2) comprises a second card holder (201) and a second shell (202); a plurality of first balls (103) are mounted on the end surface of the first shell (102); a pressure detection module (6) is mounted on the upper side wall of the first card holder (101); and two ears (203) corresponding to the two groups of pressure detection modules (6) are respectively arranged on the upper side wall of the second card holder (201); The pressure detection module (6) comprises a sleeve (601) with an opening at one end, and a push rod (602) with one end slidably disposed in the sleeve (601); a pressure sensor (603) is installed at the bottom end of the inner side of the sleeve (601), and a second ball (605) is installed at the front end of the push rod (602); The specific steps of the position adjustment method are as follows: S1: pushing the electric bicycle wheel (401) equipped with one end of the transmitting end into the arc-shaped limiting groove (501); S2: starting the second motor (313) to drive the channel steel bracket (301) and the transmitting end (1) to move toward one end close to the limit block (5); when the pressure of the pressure sensor (603) is equal to the pressure threshold, the first ball (103) fits against the end surface of the second shell (202), and the second motor (313) stops; S3: starting the first motor (307) to drive the transmitting end (1) to move upward, and when the pressure of the pressure sensor (603) is equal to zero, the second ball (605) is separated from the end surface of the second shell (202) and the support ear (203), and the first motor (307) is stopped; S4: The transmitting end (1) is started to supply power, and the transmitting end (1) is coupled with the receiving end (2) to charge the load battery of the electric bicycle.

2. The wireless charging device for electric bicycle according to claim 1, characterized in that: The channel steel bracket (301) is arranged in a vertical direction, a first slide rail (302) is installed on the end surface of the channel steel bracket (301), a first guide rail slider (303) is slidably arranged on the first slide rail (302), and the transmitting end (1) is installed on the first guide rail slider (303); A first screw rod (304) is installed in the groove of the channel steel bracket (301), the axial direction of the first screw rod (304) is the same as the length direction of the first slide rail (302), a first threaded slider (305) is threadedly connected to the first screw rod (304), a first avoidance groove (306) is opened on the end surface of the channel steel bracket (301), the upper end of the first threaded slider (305) passes through the first avoidance groove (306) and is connected to the first guide rail slider (303), the first motor (307) is installed in the groove of the channel steel bracket (301), and the power output shaft of the first motor (307) is connected to one end of the first screw rod (304).

3. The wireless charging device for electric bicycle according to claim 2, characterized in that: The bottom end of the channel steel bracket (301) is mounted on a support block (308), and the bottom end of the support block (308) is mounted with a second guide rail slider (309) and a second threaded slider (310); The second guide rail slider (309) is slidably connected to the second slide rail (311), the second threaded slider (310) is threadedly connected to the second screw rod (312), the second screw rod (312) and the second guide rail slider (309) are arranged in parallel, and one end of the second screw rod (312) is connected to the second motor (313); The second screw rod (312) and the second guide rail slider (309) are both installed in a slide box (314). The slide box (314) is used to avoid the second avoidance groove (315) of the channel steel bracket (301). A motor box (316) is provided on one side of the slide box (314), and the second motor (313) is installed in the motor box (316).

4. The wireless charging device for electric bicycle according to claim 3, characterized in that: Limiting plates (502) are also provided on the limiting blocks (5) on both sides of the arc-shaped limiting groove (501); The limiting blocks (5) at both ends of the arc-shaped limiting groove (501) are provided with guiding bevels (503) for facilitating the pushing of the electric bicycle.

5. The wireless charging device for electric bicycle according to claim 4, characterized in that: The first housing (102) is installed in the first card holder (101); A wireless charging transmitter module is installed in the first shell (102), and an input end of the wireless charging transmitter module is connected to a direct current power supply.

6. The wireless charging device for electric bicycle according to claim 5, characterized in that: A pressure spring (604) is also arranged in the sleeve (601) between the pressure sensor (603) and the push rod (602), and the two ends of the pressure spring (604) are respectively connected to the end surface of the push rod (602) and the end surface of the pressure sensor (603), and the sleeve (601) and the axis are perpendicular to the end surface of the first shell (102). When the pressure spring (604) is in a free state, the front end of the push rod (602) extends out of the vertical plane where the end surface of the first shell (102) is located.

7. The wireless charging device for electric bicycle according to claim 6, characterized in that: The number of the pressure detection modules (6) is two groups, and the two groups of pressure detection modules (6) are respectively arranged at two ends of the upper side wall of the first card placement rack (101).

8. The wireless charging device for electric bicycle according to claim 7, characterized in that: The second housing (202) is installed in the second card holder (201); A wireless charging receiving module is installed in the second housing (202), the output end of the wireless charging receiving module is connected to the battery load of the electric bicycle, and during charging, the wireless charging receiving module is coupled with the wireless charging transmitting end module to transmit electric energy.

9. The wireless charging device for electric bicycle according to claim 8, characterized in that: The center line of the second housing (202) in the vertical direction and the center axis of the electric bicycle wheel (401) are located in the same vertical plane, and the center line of the first housing (102) in the vertical direction and the center line of the arc-shaped limiting groove (501) in the width direction are located in the same vertical plane.

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