A dual-mode two-speed wheel hub motor

Abstract

The present invention discloses a dual-mode two-speed hub motor, which relates to the field of hub motors. The key points of its technical solution include: a second-gear clutch assembly connected to the end cover is arranged between the second-gear motor planetary reduction assembly and the pedal second-gear input member, and the second-gear clutch assembly is connected to a centrifugal drive assembly; the centrifugal drive assembly limits or releases the second-gear clutch assembly according to the rotation speed of the end cover, thereby controlling the transmission between the second-gear motor planetary reduction assembly and the end cover, and between the pedal second-gear input member and the end cover. The present invention includes two modes of pedal input and electric input, and each mode includes two speed gears, thereby improving the working efficiency of the motor; and in both modes, automatic gear shifting is achieved according to the output speed, thereby improving the riding experience and extending the service life of the motor.

Description

Technical Field

[0001] The present invention relates to the field of wheel hub motors, and more particularly to a dual-mode two-speed wheel hub motor. Background Art

[0002] At present, the wheel hub motors of common electric power-assisted bicycles on the market include two structural types: direct drive and gear reduction. The rotor of the direct drive motor is the wheel hub, while the rotor of the gear reduction motor is input to the wheel hub through the gear reduction mechanism.

[0003] The existing Chinese patent with authorization announcement number CN211995141U discloses an electric vehicle hub motor, which includes a hub body and a fixed shaft, on which a motor, a fixed-axis gear train assembly and a centrifugal clutch structure are sleeved, the fixed-axis gear train assembly is arranged on the right end cover of the motor's motion output through an overrunning clutch, and the centrifugal clutch structure is arranged on the left end cover of the motor's motion output; when the motor rotates in one direction, the fixed-axis gear train assembly can be driven by the overrunning clutch to drive the hub body to rotate, and the centrifugal clutch structure is in a disengaged state; when the motor rotates in another direction, the hub body is driven to rotate through the centrifugal clutch structure, and the overrunning clutch is in a disengaged state.

[0004] Although the above-mentioned electric vehicle hub motor includes two gears, namely, low gear and high gear, the gear switching requires changing the rotation direction of the electric motor, and automatic gear shifting cannot be achieved during riding.

[0005] The existing Chinese patent with publication number CN1112071160A discloses an inner-swing type block-throwing centrifugal clutch, which includes a central shaft, a motor and a wheel hub. The left side of the motor is connected to the left inner cover of the motor through an overrunning clutch and a planetary assembly, the outer side of the planetary assembly is connected to a brake part through a left end cover, the right side of the motor is connected to the inner-swing type block-throwing mechanism through a right inner cover of the motor, the outer side of the inner-swing type block-throwing mechanism is connected to a right end cover, and both the right end cover and the left end cover are connected to the wheel hub.

[0006] The above-mentioned inner swing type throwing block centrifugal clutch, at low speed, the motor drives the left end cover to rotate through the overrunning clutch and the planetary assembly to drive the wheel hub to move at low speed; at high speed, the right inner cover of the motor drives the inner swing type throwing block mechanism to drive the right end cover to rotate to drive the wheel hub to move at high speed.

[0007] However, in the above two hub motor structures, a gear reduction motor structure is formed at low speed, and a direct drive motor structure is directly formed at high speed. The difference in transmission ratio between low speed and high speed state is large, which affects the operating efficiency on the one hand, and on the other hand, the sudden increase in speed during riding is prone to safety accidents, affecting the riding experience and the service life.

[0008] Moreover, the centrifugal clutches in the above two wheel hub motor structures are connected to the motor, that is, the action of the centrifugal clutch is controlled by the motor's rotation speed. However, for the above inner swing type block centrifugal clutch, when the electric vehicle is going downhill or gliding and does not need to be started, the wheel hub remains in a high-speed state, and the motor does not rotate when the overrunning clutch is in an overrunning state, and the centrifugal clutch is reset to the initial state. When the rider starts again, if the wheel hub is still in a high-speed state, the overrunning clutch will first enter the low-speed gear after the motor rotates, and then switch to the high-speed gear. Frequent gear switching not only affects the riding experience, but also easily causes parts failure and affects the service life.

[0009] The existing Chinese patent with authorization announcement number CN211996037U discloses a hub motor and internal speed hub integrated device, which includes a main shaft, on which the internal speed hub and the hub motor are respectively mounted, and the internal speed hub is provided with an end cover. The hub motor includes a winding stator, a rotor, a sun gear, a motor clutch, an inner gear ring and a wheel hub. The internal speed hub adopts a centrifugal internal speed hub, which can automatically adjust the speed according to the rotation speed of the flywheel.

[0010] The centrifugal speed-changing hub in the above-mentioned patent utilizes centrifugal force to achieve automatic speed change. When a certain pedaling speed is reached, the centrifugal weight is swung away to achieve automatic upshifting. When the pedaling speed drops below the speed change point, the centrifugal weight will contract to achieve automatic downshifting.

[0011] However, for vehicles using the above-mentioned integrated device of the hub motor and the internal gear hub, when the vehicle is running at a high speed (greater than the shift point), if the rider does not want to pedal, or does not need to pedal when going downhill, the internal gear hub will automatically downshift due to the reduction in the rider's pedaling speed; when the vehicle still maintains a high speed (greater than the shift point) after gliding for a distance, the rider needs to pedal again to make the pedaling speed reach the shift point in a short time to make the internal gear hub automatically upshift. In this case, the automatic downshift of the internal gear hub will affect the riding experience, and the increase in the frequency of gear shifting will easily lead to the failure of the internal gear hub, affecting its service life.

[0012] Moreover, in the above patent, the pedal input includes two gears, while the motor input has only one gear, which results in a lower working efficiency of the motor. Summary of the invention

[0013] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a dual-mode two-speed hub motor, which includes two modes: pedal input and electric input, and each mode includes two speed gears, thereby improving the working efficiency of the motor; and in both modes, automatic gear shifting is achieved according to the output speed, thereby improving the riding experience and extending the service life of the motor.

[0014] To achieve the above object, the present invention provides the following technical solutions:

[0015] A dual-mode two-speed hub motor comprises a main shaft, on which a core assembly and a hub and an end cover connected to each other are arranged, wherein the core assembly comprises a first rotor and a second rotor connected to each other;

[0016] The main shaft is provided with a first-gear motor planetary reduction assembly connected between the first rotor and the wheel hub, and a second-gear motor planetary reduction assembly connected to the second rotor;

[0017] The main shaft is provided with a pedal speed change input assembly, the pedal speed change input assembly includes a pedal first gear input member and a pedal second gear input member, and a pedal first gear clutch assembly is provided between the pedal first gear input member and the end cover;

[0018] A second-gear clutch assembly connected to the end cover is provided between the second-gear motor planetary reduction assembly and the pedal second-gear input member, and the second-gear clutch assembly is connected to a centrifugal drive assembly;

[0019] The centrifugal drive assembly restricts or releases the second-gear clutch assembly according to the rotation speed of the end cover, thereby controlling the transmission between the second-gear motor planetary reduction assembly and the end cover, and between the second-gear pedal input member and the end cover.

[0020] Furthermore, the first gear motor planetary reduction assembly comprises:

[0021] a first sun gear fixedly connected to the first rotor;

[0022] a planetary clutch sleeved on the main shaft, the planetary clutch being provided with a first planetary gear meshing with the first sun gear, and,

[0023] A first inner gear ring is fixedly disposed in the wheel hub and meshes with the first planetary gear.

[0024] Furthermore, the second-gear clutch assembly includes a clutch inner ring, a motor clutch outer ring, a pedal clutch outer ring, and a clutch driving member and an elastic member arranged between the clutch inner ring, the motor clutch outer ring and the pedal clutch outer ring; the clutch inner ring is fixedly connected to the end cover, the motor clutch outer ring is connected to the second-gear motor planetary reduction assembly, and the pedal clutch outer ring is connected to the pedal second-gear input member.

[0025] Furthermore, the second-gear motor planetary reduction assembly comprises:

[0026] a second sun gear fixedly connected to the second rotor;

[0027] a second planet carrier sleeved on the main shaft, the second planet carrier being provided with a second planet gear meshing with the second sun gear; and

[0028] A second inner gear ring meshing with the second planetary gear, the second inner gear ring and the motor clutch outer ring are linked in the circumferential direction.

[0029] Furthermore, a transmission frame is fixedly provided on the second inner gear ring and is linked to the motor clutch outer ring in the circumferential direction.

[0030] Furthermore, the pedal first gear input member is a third planetary carrier, the pedal second gear input member is a third inner gear ring, the third planetary carrier is provided with a third planetary gear meshing with the third inner gear ring, the main shaft is fixedly provided with a third sun gear meshing with the third planetary gear; the third inner gear ring is linked with the outer ring of the pedal clutch in the circumferential direction.

[0031] Furthermore, a positioning plate fixedly connected to the end cover is provided on the outer side wall of the clutch inner ring, and the centrifugal drive assembly is arranged on the positioning plate.

[0032] Further, the centrifugal drive assembly includes a centrifugal block and a limiting plate, the limiting plate is provided with a release groove cooperating with the clutch drive member, and the centrifugal block is penetrated with a shaft connected with the positioning plate;

[0033] When the centrifugal block is in a contracted state, the limit plate restricts the clutch driving member, so that the clutch inner ring and the motor clutch outer ring and the pedal clutch outer ring cannot be transmitted through the clutch driving member; after the centrifugal block rotates around the shaft and is thrown away, it drives the limit plate to rotate, so that the clutch driving member is embedded in the release groove, so that the clutch inner ring and the motor clutch outer ring and the pedal clutch outer ring are transmitted through the clutch driving member.

[0034] Furthermore, the number of the centrifugal blocks is at least two, and the centrifugal drive assembly further includes an elastic reset member connected to only one of the centrifugal blocks.

[0035] Furthermore, an extension arm is provided on the limiting plate, a driving rod is provided on the centrifugal block, and a driving hole cooperating with the driving rod is opened on the extension arm.

[0036] In summary, the present invention has the following beneficial effects:

[0037] 1. The hub motor of the present invention includes two modes: pedal input and motor input. Each input mode realizes two-speed mechanical speed change. The torque and speed conversion is realized through mechanical speed change, so that the motor can work and output in the high-efficiency range, improve efficiency, and the rider can realize the speed and torque conversion at the most comfortable pedaling frequency, improving the riding experience;

[0038] 2. The centrifugal drive assembly limits or releases the second-gear clutch assembly according to the rotation speed of the end cover, which can reduce the frequency of gear shifting, extend the service life, optimize the riding experience, and obtain a smoother speed shifting experience;

[0039] 3. The second-gear motor planetary reduction assembly and the second-gear pedal input member share the second-gear clutch assembly, which can reduce the number of parts, simplify the structure, facilitate assembly, and also ensure the accuracy of control. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of a dual-mode two-speed hub motor in an embodiment;

[0041] Figure 2 An exploded schematic diagram of a dual-mode two-speed hub motor in an embodiment;

[0042] Figure 3 A partial cross-sectional view of a dual-mode two-speed hub motor in an embodiment;

[0043] Figure 4 It is a structural schematic diagram of the centrifugal drive assembly and the transmission frame in the embodiment;

[0044] Figure 5 The structure of the centrifugal drive assembly in the embodiment is shown in FIG. Figure 1 ;

[0045] Figure 6 The structure of the centrifugal drive assembly in the embodiment is shown in FIG. Figure 2 .

[0046] In the figure: 1, main shaft; 21, wheel hub; 22, end cover; 31, first rotor; 32, second rotor; 4, first gear motor planetary reduction assembly; 51, second sun gear; 52, second planet carrier; 53, second planet gear; 54, second inner gear ring; 55, first bearing; 56, transmission frame; 61, pawl seat; 62, pawl; 63, first ratchet; 64, second ratchet; 71, third planet carrier; 72, third sun gear; 7 3. The third planetary gear; 74. The third inner gear ring; 75. The first gear clutch assembly of the pedal; 76. The second bearing; 77. The third bearing; 78. The fourth bearing; 79. The gear ring; 81. The centrifugal block; 811. The shaft; 812. The driving rod; 82. The positioning plate; 821. The limiting frame; 822. The positioning groove; 83. The limiting plate; 831. The release groove; 832. The limiting groove; 833. The extension arm; 834. The driving hole; 84. The torsion spring. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0048] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0049] Example:

[0050] A dual-mode two-speed wheel hub motor, referring to Figures 1 to 6 , which includes a main shaft 1, on which a core assembly and a hub 21 and an end cover 22 connected to each other are arranged; the hub 21 and the end cover 22 are connected by screws to form a complete shell, forming a power output member; the core assembly includes a first rotor 31 and a second rotor 32 connected to each other, the first rotor 31 and the second rotor 32 are connected by screws to achieve synchronous rotation, forming a motor power input member, and the core assembly also includes a stator; the main shaft 1 is provided with a first gear motor planetary reduction assembly 4 connected between the first rotor 31 and the hub 21, and a second gear motor planetary reduction assembly connected to the second rotor 32 ; A pedal speed change input assembly is arranged on the main shaft 1, and the pedal speed change input assembly includes a pedal first gear input member and a pedal second gear input member, and a pedal first gear clutch assembly 75 is arranged between the pedal first gear input member and the end cover 22; a second gear clutch assembly connected to the end cover 22 is arranged between the second gear motor planetary reduction assembly and the pedal second gear input member, and the second gear clutch assembly is connected to a centrifugal drive assembly; the centrifugal drive assembly restricts or releases the second gear clutch assembly according to the rotation speed of the end cover 22, thereby controlling the transmission between the second gear motor planetary reduction assembly and the end cover 22, and between the pedal second gear input member and the end cover 22.

[0051] Reference Figure 1 and Figure 2 The first gear motor planetary reduction assembly 4 includes a first sun gear, a planetary clutch and a first inner gear ring, wherein the first sun gear is fixedly connected to the first rotor 31 by screws, the first inner gear ring is fixedly embedded in the inner wall of the hub 21, and the planetary clutch is provided with a first planetary gear meshing with the first sun gear and the first inner gear ring; in this embodiment, the planetary clutch is connected to the main shaft 1 by a keyway, and the planetary clutch belongs to the prior art and will not be described in detail here.

[0052] Reference Figure 3 The second-gear planetary motor reduction assembly includes a second sun gear 51, a second planet carrier 52 and a second inner gear ring 54. The second sun gear 51 is fixedly connected to the second rotor 32 by screws, and the second planet carrier 52 is fixedly fixed to the main shaft 1 by keyway cooperation. The second planet carrier 52 is provided with a second planetary gear 53 that meshes with the second sun gear 51 and the second inner gear ring 54. In this embodiment, a first bearing 55 is provided between the second inner gear ring 54 and the second planet carrier 52, and the second inner gear ring 54 is supported and positioned by the first bearing 55.

[0053] Reference Figure 3 The second-gear clutch assembly includes a clutch inner ring, a motor clutch outer ring, a pedal clutch outer ring, and a clutch driving member and an elastic member arranged between the clutch inner ring and the motor clutch outer ring and the pedal clutch outer ring; in this embodiment, the second-gear clutch assembly adopts a ratchet pawl structure. In other optional embodiments, clutches such as one-way bearings can also be used, which is not limited here; specifically, the clutch inner ring is a pawl seat 61, the motor clutch outer ring is a first ratchet 63, the pedal clutch outer ring is a second ratchet 64, the clutch driving member is a pawl 62, and the elastic member is a spring coil; the second-gear clutch assembly in this embodiment adopts a structure in which a group of pawls cooperate with two ratchets, which can reduce the number of parts and facilitate assembly, while also ensuring the accuracy of control.

[0054] Reference Figure 3 and Figure 4 In this embodiment, a transmission frame 56 is fixedly provided at the end of the second inner gear ring 54 and is linked with the first ratchet 63 in the circumferential direction. The first ratchet 63 is embedded in the transmission frame 56. Specifically, the inner wall of the transmission frame 56 and the outer wall of the first ratchet 63 are respectively provided with spaced protrusions (not shown in the drawings). The two realize circumferential transmission through the protrusions, and can also play a buffering role to improve the riding experience.

[0055] Reference Figure 3 In this embodiment, the pedal first gear input member is the third planetary carrier 71, and the pedal second gear input member is the third inner gear ring 74. The third planetary carrier 71 is provided with a third planetary gear 73 meshing with the third inner gear ring 74. The main shaft 1 is fixedly provided with a third sun gear 72 meshing with the third planetary gear 73. In this embodiment, the third sun gear 72 and the main shaft 1 are integrally formed; the third inner gear ring 74 is linked with the outer ring of the pedal clutch in the circumferential direction. Specifically, the second ratchet 64 is embedded in the third inner gear ring 74, and the circumferential transmission structure between the second ratchet 64 and the third inner gear ring 74 is the same as the circumferential transmission structure between the first ratchet 63 and the transmission frame 56, which will not be repeated here.

[0056] Reference Figure 3In this embodiment, the pedal first gear clutch assembly 75 adopts a ratchet pawl structure. In other optional embodiments, the pedal first gear clutch assembly 75 can also adopt a clutch such as a one-way bearing, which is not limited here; specifically, the outer wall of the third inner gear ring 74 is provided with a second bearing 76 connected to the pedal first gear clutch assembly 75, and the pedal first gear clutch assembly 75 is supported and positioned by the second bearing 76; in this embodiment, the second bearing 76 is a needle bearing, which can control the radial dimension; a third bearing 77 is provided between the third planetary carrier 71 and the end cover 22, and a fourth bearing 78 is provided between the third planetary carrier 71 and the main shaft 1; the outer wall of the third planetary carrier 71 is provided with a gear ring 79 which is circumferentially linked thereto, and the gear ring 79 is located on the outer side of the end cover 22, and the pedal power input is realized through the gear ring 79.

[0057] Reference Figures 3 to 6 The pawl seat 61 is fixedly connected to the end cover 22. Specifically, the outer wall of the pawl seat 61 is provided with a positioning plate 82 fixedly connected to the end cover 22, and the centrifugal drive assembly is arranged on the positioning plate 82; in this embodiment, the positioning plate 82 and the pawl seat 61 are integrally formed, the positioning plate 82 and the end cover 22 are fixedly connected by screws, and the first ratchet 63 and the second ratchet 64 are respectively located on both sides of the positioning plate 82; in this embodiment, a bearing is arranged between the pawl seat 61 and the main shaft 1, and a speed sensing assembly can be arranged between the third planetary carrier 71 and the pawl seat 61 to realize the monitoring of the gear state.

[0058] Reference Figures 3 to 6 The centrifugal drive assembly includes a centrifugal block 81 and a limiting plate 83, in which a release groove 831 cooperating with the pawl 62 is arranged, and a shaft 811 connected to the positioning plate 82 is passed through the centrifugal block 81; when the centrifugal block 81 is in the retracted state, the limiting plate 83 limits the pawl 62, so that the pawl seat 61 and the first ratchet 63 and the second ratchet 64 cannot be transmitted through the pawl 62; after the centrifugal block 81 rotates around the shaft 811 and is thrown away, it drives the limiting plate 83 to rotate, so that the pawl 62 is embedded in the release groove 831, so that the pawl seat 61 and the first ratchet 63 and the second ratchet 64 can be transmitted through the pawl 62.

[0059] Reference Figures 3 to 6 Under the elastic force of the spring coil, the meshing end of the pawl 62 can be lifted up and mesh with the first ratchet 63 and the second ratchet 64, and the limit plate 83 limits the pawl 62 by pressing its meshing end and preventing it from being lifted up. Specifically, in this embodiment, a limit groove 832 is provided in the limit plate 83 to cooperate with the meshing end of the pawl 62. Of course, in other optional embodiments, the pawl 62 can also be directly pressed by the inner side wall of the limit plate 83, which is not limited here.

[0060] Reference Figure 5 and Figure 6, in this embodiment, an extension arm 833 is provided on the limit plate 83, a driving rod 812 is provided on the centrifugal block 81, and a driving hole 834 cooperating with the driving rod 812 is opened on the extension arm 833; after the centrifugal block 81 rotates and throws away, the limit plate 83 is driven to rotate by the driving rod 812; in this embodiment, the number of centrifugal blocks 81 is two, and the centrifugal drive assembly also includes an elastic reset member connected to only one of the centrifugal blocks 81. In this embodiment, the elastic reset member is a torsion spring 84 provided on the positioning plate 82, and the elastic force of the torsion spring 84 makes the centrifugal block 81 have a tendency to reset to the contracted state; the number of centrifugal blocks 81 is two, and if one centrifugal block 81 is not accurately reset, the limit plate 83 cannot be accurately reset; there will also be differences between torsion springs of the same specifications, so only one torsion spring 84 is provided to promote the reset of the centrifugal block 81, which can ensure the accurate reset of the limit plate 83, thereby ensuring the smooth switching between the restriction and release states.

[0061] Reference Figure 5 and Figure 6 In this embodiment, two limiting frames 821 cooperating with the centrifugal block 81 are provided on the positioning plate 82, and the limiting frames 821 can radially limit the centrifugal block 81; in this embodiment, a positioning groove 822 cooperating with the centrifugal block 81 is provided on the positioning plate 82, and the centrifugal block 81 is embedded in the positioning groove 822 when in the retracted state.

[0062] Here’s how it works:

[0063] The hub motor in this embodiment includes two power input modes, and each input mode can realize two-speed automatic shifting. Specifically, the working principle is explained below using a mode of pedaling in conjunction with electric power assistance.

[0064] In the first gear and low speed, after the rider pedals, the chain drives the ring gear 79 to rotate, thereby realizing pedal power input; the ring gear 79 drives the third planetary carrier 71 to rotate, and the third planetary carrier 71 drives the end cover 22 and the wheel hub 21 to rotate through the pedal first gear clutch assembly 75, thereby driving the vehicle forward; after the vehicle is running, the first rotor 31 inputs the rotation speed to the wheel hub 21 through the first gear motor planetary reduction assembly 4, thereby realizing electric power assistance, thereby saving effort in riding the vehicle; at this time, the rotation speed of the wheel hub 21 and the end cover 22 has not reached the speed change point, and the centrifugal block 81 is in a retracted state, then the second gear clutch assembly cannot transmit, so the rotation speeds of the third inner ring gear 74 and the second rotor 32 cannot be transmitted to the end cover 22.

[0065] When the second gear is in high speed, the rotation speed of the hub 21 and the end cover 22 reaches the speed change point, the centrifugal block 81 rotates to the swing-away state, the second gear clutch assembly switches to the meshing state, and the rotation speeds of the third inner gear ring 74 and the second rotor 32 are transmitted to the end cover 22, so that the motor automatically switches to the second gear; the rotation speed of the third inner gear ring 74 is greater than the rotation speed of the third planetary carrier 71, and the rotation speed of the second rotor 32 output to the end cover 22 through the second gear motor planetary reduction assembly is greater than the rotation speed of the first rotor 31 output to the hub 21 through the first gear motor planetary reduction assembly, so in the second gear high speed state, the planetary clutch and the pedal first gear clutch assembly 75 are both in the overtaking state.

[0066] When the vehicle is downhill or gliding and does not need to be pedaled, the wheel hub 21 and the end cover 22 remain in a high-speed state. At this time, the planetary clutch, the first-gear clutch assembly 75 and the second-gear clutch assembly are all in an overtaking state. When the wheel hub 21 and the end cover 22 are maintained in a high-speed state and are stepped on again, the centrifugal block 81 remains in a disengaged state according to the rotation speed of the end cover 22. The motor continues to work directly in the second gear state without the need to switch gears, thereby reducing the number of gear shifts, extending the service life of the motor, and improving the riding experience.

Claims

1. A dual-mode two-speed hub motor, comprising a main shaft, on which a core assembly and a hub and an end cover connected to each other are arranged, wherein the core assembly comprises a first rotor and a second rotor connected to each other; Features: The main shaft is provided with a first-gear motor planetary reduction assembly connected between the first rotor and the wheel hub, and a second-gear motor planetary reduction assembly connected to the second rotor; The main shaft is provided with a pedal speed change input assembly, the pedal speed change input assembly includes a pedal first gear input member and a pedal second gear input member, and a pedal first gear clutch assembly is provided between the pedal first gear input member and the end cover; A second-gear clutch assembly connected to the end cover is provided between the second-gear motor planetary reduction assembly and the pedal second-gear input member, and the second-gear clutch assembly is connected to a centrifugal drive assembly; The centrifugal drive assembly restricts or releases the second-gear clutch assembly according to the rotation speed of the end cover, thereby controlling the transmission between the second-gear motor planetary reduction assembly and the end cover, and between the second-gear pedal input member and the end cover; The first gear motor planetary reduction assembly comprises: a first sun gear fixedly connected to the first rotor; a planetary clutch sleeved on the main shaft, the planetary clutch being provided with a first planetary gear meshing with the first sun gear, and, a first inner gear ring fixedly disposed in the wheel hub and meshing with the first planetary gear; The second-gear clutch assembly includes a clutch inner ring, a motor clutch outer ring, a pedal clutch outer ring, and a clutch driving member and an elastic member arranged between the clutch inner ring, the motor clutch outer ring and the pedal clutch outer ring; the clutch inner ring is fixedly connected to the end cover, the motor clutch outer ring is connected to the second-gear motor planetary reduction assembly, and the pedal clutch outer ring is connected to the pedal second-gear input member.

2. The dual-mode two-speed hub motor according to claim 1, characterized in that: The second gear motor planetary reduction assembly comprises: a second sun gear fixedly connected to the second rotor; a second planet carrier sleeved on the main shaft, the second planet carrier being provided with a second planet gear meshing with the second sun gear; and A second inner gear ring meshing with the second planetary gear, the second inner gear ring and the motor clutch outer ring are linked in the circumferential direction.

3. The dual-mode two-speed hub motor according to claim 2, characterized in that: A transmission frame is fixedly arranged on the second inner gear ring and is linked with the motor clutch outer ring along the circumferential direction.

4. The dual-mode two-speed hub motor according to claim 1, characterized in that: The pedal first gear input member is the third planetary carrier, the pedal second gear input member is the third inner gear ring, the third planetary carrier is provided with a third planetary gear meshing with the third inner gear ring, the main shaft is fixedly provided with a third sun gear meshing with the third planetary gear; the third inner gear ring is linked with the pedal clutch outer ring in the circumferential direction.

5. The dual-mode two-speed hub motor according to claim 1, characterized in that: The outer side wall of the clutch inner ring is provided with a positioning plate fixedly connected to the end cover, and the centrifugal drive assembly is arranged on the positioning plate.

6. The dual-mode two-speed hub motor according to claim 5, characterized in that: The centrifugal drive assembly includes a centrifugal block and a limiting plate, wherein a release groove cooperating with the clutch drive member is arranged in the limiting plate, and a shaft connected to the positioning plate is passed through the centrifugal block; When the centrifugal block is in a contracted state, the limit plate restricts the clutch driving member, so that the clutch inner ring and the motor clutch outer ring and the pedal clutch outer ring cannot be transmitted through the clutch driving member; after the centrifugal block rotates around the shaft and is thrown away, it drives the limit plate to rotate, so that the clutch driving member is embedded in the release groove, so that the clutch inner ring and the motor clutch outer ring and the pedal clutch outer ring are transmitted through the clutch driving member.

7. The dual-mode two-speed hub motor according to claim 6, characterized in that: The number of the centrifugal blocks is at least two, and the centrifugal drive assembly further comprises an elastic reset member connected to only one of the centrifugal blocks.

8. The dual-mode two-speed hub motor according to claim 6, characterized in that: The limit plate is provided with an extension arm, the centrifugal block is provided with a driving rod, and the extension arm is provided with a driving hole matched with the driving rod.

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