Axial magnetic flux generator and implementation method thereof

Abstract

The axial magnetic flux generator comprises a shell, an end cover is connected to the opening side of the shell, an inner gear ring is connected to the inner wall of the shell, a supporting shaft is arranged in the shell, a shaft sleeve located in the shell is rotationally arranged on the supporting shaft, and one end of the shaft sleeve is connected with a connecting gear; a gear set meshed with the inner gear ring and the connecting gear is connected to the supporting shaft, two magnetic sheets are connected to the shaft sleeve, and a coil located between the two magnetic sheets is connected to the inner wall of the shell. The invention further discloses an implementation method of the axial magnetic flux generator. The wheel rotates to drive the inner gear ring to rotate, the connecting gear is driven to rotate under cooperation of the gear set, so that the magnetic sheet is driven to rotate, the coil generates induction current to achieve power generation, the inner gear ring, the gear set and the connecting gear form a planetary gear structure, and the rotating speed of the connecting gear is far higher than that of the inner gear ring; therefore, the power generation efficiency is effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of hub generator technology, specifically relating to an axial flux generator and its implementation method. Background Technology

[0002] Existing bicycle generator hubs generally consist of an inner stator assembly fixed to the hub's central axle and an outer hub housing assembly capable of rotating relative to the central axle. The inner stator assembly includes the hub axle, two stator yokes, a cylindrical core yoke connecting the two yokes, a frame, and wound coils. The outer rotor assembly includes a hub housing, end caps, and permanent magnets mounted on the inner ring surface of the housing. The N and S poles of the permanent magnets are evenly spaced and correspond to the stator yokes. The multiple spokes of the front wheel are fixed to flanges on both sides of the hub housing. When the front wheel rotates, an alternating magnetic flux is generated within the cylindrical core yoke inside the coil, inducing a current in the coil. One end of the coil is led out of the hub housing, and the power generated during hub rotation is output through an insulated connector.

[0003] The rotor assembly of existing hub generators is generally directly connected to the wheel, and the rotation of the wheel drives the rotor assembly to rotate to generate electricity. In practical applications, when the wheel rotates at low speed, the power generation efficiency will be low.

[0004] Therefore, there is an urgent need for an axial flux generator that can ensure high-speed rotation of the rotor assembly even when the wheels are rotating at low speeds, thereby ensuring power generation efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an axial flux generator to solve the problems mentioned in the background section. The axial flux generator provided by this invention has the characteristic of ensuring high-speed rotation of the rotor assembly even when the wheels are rotating at low speeds, thereby guaranteeing power generation efficiency.

[0006] Another objective of this invention is to provide a method for implementing an axial flux generator.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an axial flux generator, comprising a housing, an end cover connected to the open side of the housing, an internal gear ring connected to the inner wall of the housing, a support shaft provided inside the housing, the support shaft being connected to the housing and the end cover respectively via bearings, a bushing located inside the housing rotatably mounted on the support shaft, the bushing being connected to the support shaft via bearings, a connecting gear connected to one end of the bushing, a gear set connected to the support shaft respectively meshing with the internal gear ring and the connecting gear, two magnetic plates connected to the bushing, and a coil located between the two magnetic plates connected to the inner wall of the housing.

[0008] In order to enable the rotation of the internal gear ring to drive the rotation of the connecting gear, the gear set further includes a mounting frame and a mating gear. The mounting frame is connected to the support shaft, and the mounting frame is provided with several mounting shafts arranged in a circular array. The mating gear is connected to the mounting shaft through a bearing, and the mating gear meshes with the internal gear ring and the connecting gear respectively.

[0009] In order to further increase the rotational speed of the connecting gear while keeping the rotational speed of the internal gear ring constant, thereby improving the power generation efficiency, the outer diameter of the mating gear is further made larger than the outer diameter of the connecting gear.

[0010] To achieve current output, the bushing is made of insulating material and has two spaced-apart conductive rings corresponding to the coil. The coil leads are connected to the corresponding conductive rings via elastic conductors or carbon brushes, and the output leads are also connected to the corresponding conductive rings via carbon brushes.

[0011] To facilitate the routing of output wires, the support shaft is further designed as a hollow structure.

[0012] To effectively dissipate heat from the coil, the housing is further provided with several ventilation slots arranged in a ring array and corresponding to the coil on its circumference, and an arc-shaped ventilation pipe is provided on the inner wall of the housing, with both ends of the arc-shaped ventilation pipe connected to the ventilation slots respectively.

[0013] Furthermore, in this invention, the method for implementing an axial flux generator includes the following steps:

[0014] (a) The support axle is installed on the frame of the bicycle or electric bicycle with the non-drive wheel;

[0015] (ii) The shell is connected to the rim of a bicycle wheel or a non-drive wheel of an electric bicycle;

[0016] (III) The rotation of the wheel drives the internal gear ring to rotate, the rotation of the internal gear ring drives the mating gear to rotate, the rotation of the mating gear drives the connecting gear to rotate, thereby driving the bushing to rotate, the rotation of the bushing drives the magnetic sheet to rotate, causing the coil to generate an induced current, thereby realizing power generation.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention uses the rotation of a wheel to drive the rotation of an internal gear ring, which in turn drives the rotation of a connecting gear in conjunction with a gear set, thereby driving the rotation of a magnetic sheet. This causes the coil to generate an induced current and generate electricity. The internal gear ring, gear set, and connecting gear form a planetary gear structure, which makes the rotational speed of the connecting gear much higher than that of the internal gear ring, thus effectively improving the power generation efficiency.

[0019] 2. In this invention, the magnetic sheets and coils are axially distributed, and multiple sets of coils and magnetic sheets can be stacked, making full use of space. Compared with traditional circumferentially distributed generators, this invention has higher power generation efficiency in the same volume.

[0020] 3. In this invention, the outer diameter of the mating gear is larger than the outer diameter of the connecting gear. With the rotational speed of the internal gear ring remaining constant, the rotational speed of the connecting gear is further increased, thereby improving the power generation efficiency.

[0021] 4. The support shaft of this invention has a hollow structure, which facilitates the routing of output wires.

[0022] 5. The housing of the present invention has a plurality of ventilation slots arranged in a ring array and corresponding to the coil on its circumference. The inner wall of the housing is provided with an arc-shaped ventilation pipe. The two ends of the arc-shaped ventilation pipe are respectively connected to the ventilation slots by sealant. When the housing rotates, the airflow flows through the arc-shaped ventilation pipe, which can effectively dissipate heat from the coil.

[0023] 6. The rotation direction of the housing of the present invention is opposite to the rotation direction of the magnetic sheet, that is, the rotation direction of the coil is opposite to the rotation direction of the magnetic sheet, which further increases the rotational speed of the coil relative to the magnetic sheet, thereby improving the power generation efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the support shaft and gear set of the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the connecting gear and gear set of the present invention.

[0027] Figure 4 This is a cross-sectional view of the bushing structure of the present invention.

[0028] Figure 5 This is a schematic diagram of the structure of the housing of the present invention.

[0029] Figure 6 This is a schematic diagram of the arc-shaped ventilation duct of the present invention.

[0030] In the diagram: 1. Housing; 101. Ventilation slot; 2. Internal gear ring; 3. Coil; 4. End cover; 5. Bushing; 51. Conductive ring; 6. Magnetic sheet; 7. Connecting gear; 8. Support shaft; 9. Gear set; 91. Mounting bracket; 92. Mating gear; 10. Arc-shaped ventilation pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this invention, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used merely for distinction in description and have no special meaning.

[0035] Example 1

[0036] Please see Figures 1-6This embodiment provides the following technical solution: an axial flux generator, including a housing 1, an end cover 4 connected to the open side of the housing 1, an internal gear ring 2 connected to the inner wall of the housing 1, a support shaft 8 provided inside the housing 1, the support shaft 8 being connected to the housing 1 and the end cover 4 respectively through bearings, a bushing 5 rotatably located inside the housing 1 on the support shaft 8, the bushing 5 being connected to the support shaft 8 through bearings, a connecting gear 7 connected to one end of the bushing 5, a gear set 9 connected to the support shaft 8 respectively meshing with the internal gear ring 2 and the connecting gear 7, two magnetic plates 6 connected to the bushing 5, and a coil 3 located between the two magnetic plates 6 connected to the inner wall of the housing 1.

[0037] By adopting the above technical solution, this invention uses the rotation of the wheel to drive the rotation of the internal gear ring 2, which, in conjunction with the gear set 9, drives the rotation of the connecting gear 7, thereby driving the rotation of the magnetic sheet 6. This causes the coil 3 to generate an induced current, thus generating electricity. The internal gear ring 2, gear set 9, and connecting gear 7 form a planetary gear structure, making the rotational speed of the connecting gear 7 much higher than that of the internal gear ring 2, thereby effectively improving the power generation efficiency. In this invention, the magnetic sheet 6 and the coil 3 are axially distributed, allowing multiple sets of coils 3 and magnetic sheets 6 to be stacked, making full use of space. Compared with traditional circumferentially distributed generators, this invention has a higher power generation efficiency within the same volume. The rotation direction of the housing 1 is opposite to the rotation direction of the magnetic sheet 6, that is, the rotation direction of the coil 3 is opposite to the rotation direction of the magnetic sheet 6, further increasing the rotational speed of the coil 3 relative to the magnetic sheet 6, thereby improving the power generation efficiency.

[0038] Example 2

[0039] The difference between this embodiment and embodiment 1 is that, specifically, the gear set 9 includes a mounting frame 91 and a mating gear 92. The mounting frame 91 is connected to the support shaft 8. The mounting frame 91 is provided with a plurality of mounting shafts arranged in a circular array. The mating gear 92 is connected to the mounting shaft through a bearing. The mating gear 92 is meshed with the internal gear ring 2 and the connecting gear 7 respectively.

[0040] By adopting the above technical solution, the gear 92 meshes with the internal gear ring 2 and the connecting gear 7 respectively, so that the rotation of the internal gear ring 2 drives the rotation of the connecting gear 7.

[0041] Example 3

[0042] The difference between this embodiment and embodiment 1 is that, specifically, the outer diameter of the mating gear 92 is larger than the outer diameter of the connecting gear 7.

[0043] By adopting the above technical solution, the rotational speed of the connecting gear 7 is further increased while the rotational speed of the internal gear ring 2 remains unchanged, thereby improving the power generation efficiency.

[0044] Example 4

[0045] The difference between this embodiment and Embodiment 1 is as follows: Specifically, the bushing 5 is made of insulating material, and the bushing 5 has two mutually spaced conductive rings 51 corresponding to the coil 3. The bushing 5 is made of nylon, and the conductive rings 51 are made of copper. The conductive rings 51 and the bushing 5 are injection molded. The lead end of the coil 3 is connected to the corresponding conductive ring 51 through an elastic conductor or a carbon brush. The output wire is also connected to the corresponding conductive ring 51 through an elastic conductor or a carbon brush. In this embodiment, a carbon brush is preferred.

[0046] By adopting the above technical solution, current output can be achieved.

[0047] Specifically, support shaft 8 is a hollow structure.

[0048] By adopting the above technical solution, the routing of output wires is facilitated.

[0049] Example 5

[0050] The difference between this embodiment and embodiment 1 is that: specifically, the circumference of the housing 1 is provided with a number of ventilation slots 101 arranged in a ring array and corresponding to the coil 3, and the inner wall of the housing 1 is provided with an arc-shaped ventilation pipe 10. The two ends of the arc-shaped ventilation pipe 10 are respectively connected to the ventilation slots 101 by sealant, and the coil 3 is in contact with the arc-shaped ventilation pipe 10.

[0051] By adopting the above technical solution, when the housing 1 rotates, the airflow flows through the arc-shaped ventilation pipe 10, which can effectively dissipate heat from the coil 3.

[0052] Example 6

[0053] Furthermore, the method for implementing an axial flux generator according to the present invention includes the following steps:

[0054] (a) The support shaft 8 is installed on the frame of a bicycle or electric bicycle with a non-drive wheel;

[0055] (ii) The housing 1 is connected to the rim of a bicycle wheel or a non-drive wheel of an electric bicycle;

[0056] (III) The rotation of the wheel drives the internal gear ring 2 to rotate, the rotation of the internal gear ring 2 drives the mating gear 92 to rotate, the rotation of the mating gear 92 drives the connecting gear 7 to rotate, thereby driving the bushing 5 to rotate, the rotation of the bushing 5 drives the magnetic sheet 6 to rotate, causing the coil 3 to generate an induced current, thereby realizing power generation.

[0057] In summary, this invention utilizes the rotation of the wheel to drive the rotation of the internal gear ring 2, which, in conjunction with the gear set 9, drives the rotation of the connecting gear 7, thereby causing the magnetic sheet 6 to rotate. This induces a current in the coil 3, generating electricity. The internal gear ring 2, gear set 9, and connecting gear 7 form a planetary gear structure, allowing the connecting gear 7 to rotate at a much higher speed than the internal gear ring 2, thus effectively improving power generation efficiency. The magnetic sheet 6 and coil 3 are axially distributed, allowing for the stacking of multiple coils 3 and magnetic sheets 6, making full use of space. Compared to traditional circumferentially distributed generators, this invention achieves higher power generation efficiency within the same volume. The outer diameter of the mating gear 92 is larger than that of the connecting gear 7, further increasing the rotational speed of the connecting gear 7 while maintaining the same speed of the internal gear ring 2, thus improving power generation efficiency. The support shaft 8 is a hollow structure, facilitating the routing of the output wires. The housing 1 of the present invention has a plurality of ventilation slots 101 arranged in a ring array and corresponding to the coil 3 on its circumference. The inner wall of the housing 1 is provided with an arc-shaped ventilation pipe 10. The two ends of the arc-shaped ventilation pipe 10 are respectively connected to the ventilation slots 101 by sealant. When the housing 1 rotates, the airflow flows through the arc-shaped ventilation pipe 10, which can effectively dissipate heat from the coil 3.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An axial flux generator comprising a housing characterised in that: The opening side of the shell is connected with an end cover, the inner wall of the shell is connected with an inner gear ring, the inside of the shell is provided with a support shaft, the support shaft is rotatably connected with a shaft sleeve inside the shell, one end of the shaft sleeve is connected with a connecting gear, the support shaft is connected with a gear set which is respectively engaged with the inner gear ring and the connecting gear, the shaft sleeve is connected with two magnetic sheets, and the inner wall of the shell is connected with a coil between the two magnetic sheets.

2. An axial flux generator as claimed in claim 1, characterised in that: The gear set comprises a mounting frame and a matching gear, wherein the mounting frame is connected with the support shaft, the mounting frame is provided with a plurality of mounting shafts arranged in a ring array, and the matching gear is connected with the mounting shafts through bearings and is engaged with the inner gear ring and the connecting gear.

3. An axial flux generator as claimed in claim 2, characterised in that: The outer diameter of the matching gear is greater than the outer diameter of the connecting gear.

4. An axial flux generator as claimed in claim 1, characterised in that: The support shaft is connected with the shell and the end cover through bearings.

5. An axial flux generator as claimed in claim 1, characterised in that: The shaft sleeve is connected with the support shaft through a bearing.

6. An axial flux generator as claimed in claim 1, characterised in that: The shaft sleeve is made of insulating material and is provided with two conductive rings corresponding to the coil and spaced apart from each other.

7. An axial flux generator as claimed in claim 6, characterised in that: The lead end of the coil is connected with the corresponding conductive ring through an elastic conductor or a carbon brush, and the output lead is also connected with the corresponding conductive ring through a carbon brush.

8. An axial flux generator as claimed in claim 1, characterised in that: The support shaft is a hollow structure.

9. An axial flux generator as claimed in claim 1, characterised in that: The circumference of the shell is provided with a plurality of ventilation grooves arranged in a ring array and corresponding to the coil, and the inner wall of the shell is provided with an arc-shaped ventilation pipe, the two ends of the arc-shaped ventilation pipe are respectively connected with the ventilation grooves.

10. A method of implementing an axial flux generator according to any one of claims 1 to 9, wherein, The method comprises the following steps: (1) the support shaft is installed on the frame of the non-driving wheel of the bicycle or electric bicycle; (2) the shell is connected with the rim of the bicycle wheel or the non-driving wheel of the electric bicycle; (3) the rotation of the wheel drives the rotation of the inner gear ring, the rotation of the inner gear ring drives the rotation of the matching gear, the rotation of the matching gear drives the rotation of the connecting gear, thereby driving the rotation of the shaft sleeve, the rotation of the shaft sleeve drives the rotation of the magnetic sheet, so that the coil generates induced current, thereby realizing power generation.

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