CN113086080A

CN113086080A - Dual-mode two-speed hub motor

Info

Publication number: CN113086080A
Application number: CN202110424179.3A
Authority: CN
Inventors: 王清华; 王英喆; 黄善劲
Original assignee: Bafang Electric Suzhou Co Ltd
Current assignee: Bafang Electric Suzhou Co Ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-07-09

Abstract

The invention discloses a dual-mode two-speed hub motor, and relates to the field of hub motors. The key points of the technical scheme comprise: a second-gear clutch assembly connected with 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 with a centrifugal driving assembly; the centrifugal driving assembly limits or releases the second gear clutch assembly according to the rotating speed of the end cover, so that transmission between the second gear motor planetary reduction assembly and the end cover and transmission between the pedal second gear input member and the end cover are controlled. The invention comprises two modes of pedal input and electric input, and each mode comprises two speed change gears, thereby improving the working efficiency of the motor; and all realize automatic gearshift according to the output speed under two kinds of modes to can improve the experience of riding, and prolong the life of motor.

Description

Dual-mode two-speed hub motor

Technical Field

The invention relates to the field of hub motors, in particular to a dual-mode two-speed hub motor.

Background

The hub motor of the common electric power-assisted bicycle in the current market comprises two structural types of direct drive and gear reduction. The rotor of the direct drive motor is the wheel hub, and the rotor of the gear reduction motor is input to the wheel hub through the gear reduction mechanism.

The prior Chinese patent with the publication number of CN211995141U discloses an electric vehicle hub motor, which comprises a hub body and a fixed shaft, wherein the fixed shaft is sleeved with a motor, a fixed-shaft gear train gear assembly and a centrifugal clutch structure, the fixed-shaft gear train gear assembly is arranged on a motion output right end cover of the motor through an overrunning clutch, and the centrifugal clutch structure is arranged on a motion output left end cover of the motor; when the motor rotates along one direction, the overrunning clutch can drive the gear assembly of the ordinary gear train to drive the hub body to rotate, and the centrifugal clutch structure is in a separated state; when the motor rotates along the other direction, the hub body is driven to rotate through the centrifugal clutch structure, and the overrunning clutch is in a separated state.

Although the hub motor of the electric vehicle comprises two gears of a resisting gear and a high gear, the switching of the gears needs to change the electric rotating direction, and automatic gear shifting cannot be realized in the riding process.

The current chinese patent with publication number CN1112071160A discloses an inner swing type centrifugal clutch of throwing block, which comprises a central shaft, a motor and a hub, wherein the left side of the motor is connected with the left inner cover of the motor through an overrunning clutch and a planetary assembly, the outer side of the planetary assembly is connected with a brake piece through a left end cover, the right side of the motor is connected with an inner swing type throwing block mechanism through a right inner cover of the motor, the outer side of the inner swing type throwing block mechanism is connected with a right end cover, and the right end cover and the left end cover are both connected with the hub.

In the internal swing type flail block centrifugal clutch, at low speed, the motor drives the left end cover to rotate through the overrunning clutch and the planet assembly so as to drive the hub to move at low speed; at high speed, the right inner cover of the motor drives the inner swing type flail block mechanism to act to drive the right end cover to rotate so as to drive the hub to move at high speed.

However, in the two types of in-wheel motor structures, a gear reduction motor structure is formed at a low speed, a direct-drive motor structure is formed at a high speed, the difference between the transmission ratio of the low speed and the transmission ratio of the high speed is large, the running efficiency is influenced, and on the other hand, safety accidents are easy to occur in sudden increase of the rotating speed during riding, the riding experience is influenced, and the service life is influenced.

In addition, the centrifugal clutches in the two hub motor structures are connected with the motor, namely, the actions of the centrifugal clutches are controlled through the rotating speed of the motor. However, for the above mentioned internal pendulum type centrifugal clutch with flail block, when the electric vehicle is not required to start up on a downhill or in a sliding mode, the hub is kept in a high speed state, the overrunning clutch is in an overrunning state, the motor does not rotate, the centrifugal clutch is reset to an initial state, when the rider starts up again, if the hub is still in a high speed state, the overrunning clutch is firstly clutched to enter a low speed gear after the motor rotates, and then the high speed gear is switched, so that the riding experience is affected by frequent gear switching, and the service life is affected by the component failure.

The prior Chinese patent with the publication number of CN211996037U discloses an integrated device of an in-wheel motor and an internal speed-changing hub, which comprises a main shaft, wherein the main shaft is respectively sleeved with the internal speed-changing hub and the in-wheel motor, an end cover is arranged on the internal speed-changing hub, the in-wheel motor comprises a winding stator, a rotor, a sun gear, a motor clutch, an inner gear ring and a hub, the internal speed-changing hub adopts a centrifugal internal speed-changing hub, and the speed can be automatically adjusted according to the rotating speed of a flywheel.

The centrifugal speed-changing hub in the patent utilizes centrifugal force to realize automatic speed change, when a certain pedaling speed is reached, the centrifugal block is thrown away to realize automatic gear-up, and when the pedaling speed is reduced below a speed-changing point, the centrifugal block is contracted to realize automatic gear-down.

However, for a vehicle using the hub motor and the internal shift hub integrated device, when the vehicle is running at a high speed (greater than a shift point), if a rider does not want to step on the hub motor or does not need to step on the hub motor or the hub motor and the internal shift hub integrated device in a downhill, the internal shift hub can automatically downshift due to the reduction of the stepping frequency speed of the rider; when the vehicle still keeps high speed (greater than the speed change point) after sliding for a certain distance, the rider needs to make the pedaling speed reach the speed change point within a short time after pedaling again so as to automatically upshift the internal speed change hub. The experience of riding can be influenced to the automatic downshift of interior variable speed flower-drum under this kind of condition, and the increase of the frequency of shifting moreover leads to the trouble of interior variable speed flower-drum easily, influences its life.

Also, in the above patent, the foot input includes two gears and the motor inputs only one gear, which results in a more efficient operation of the motor.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a dual-mode two-speed hub motor which comprises a pedal input mode and an electric input mode, wherein each mode comprises two variable-speed gears, so that the working efficiency of the motor can be improved; and all realize automatic gearshift according to the output speed under two kinds of modes to can improve the experience of riding, and prolong the life of motor.

In order to achieve the purpose, the invention provides the following technical scheme:

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

the main shaft is provided with a first gear motor planetary reduction assembly connected between the first rotor and the hub and a second gear motor planetary reduction assembly connected with the second rotor;

the main shaft is provided with a pedal speed change input assembly, the pedal speed change input assembly comprises a pedal first-gear input member and a pedal second-gear input member, and a pedal first-gear clutch assembly is arranged between the pedal first-gear input member and the end cover;

a second-gear clutch assembly connected with 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 with a centrifugal driving assembly;

the centrifugal driving assembly limits or releases the second gear clutch assembly according to the rotating speed of the end cover, so that transmission between the second gear motor planetary reduction assembly and the end cover and transmission between the pedal second gear input member and the end cover are controlled.

Further, the first gear motor planetary reduction assembly comprises:

the first sun gear is fixedly connected with the first rotor;

a planetary clutch sleeved on the main shaft, a first planetary wheel meshed with the first sun gear is arranged on the planetary clutch, and,

and the first inner gear ring is fixedly arranged in the hub and meshed with the first planet gear.

Furthermore, the two-gear clutch assembly comprises a clutch inner ring, a motor clutch outer ring, a pedal clutch outer ring, a clutch driving piece and an elastic piece, wherein the clutch driving piece and the elastic piece are arranged between the clutch inner ring and the motor clutch outer ring as well as between the clutch outer ring and the pedal clutch outer ring; the clutch inner ring is fixedly connected with the end cover, the motor clutch outer ring is connected with the second gear motor planetary reduction assembly, and the pedal clutch outer ring is connected with the pedal second gear input member.

Further, the second gear motor planetary reduction assembly comprises:

the second sun gear is fixedly connected with the second rotor;

the second planet carrier is sleeved on the main shaft, and a second planet wheel meshed with the second sun wheel is arranged on the second planet carrier; and the number of the first and second groups,

and the second inner gear ring is meshed with the second planet gear and is linked with the motor clutch outer ring along the circumferential direction.

Further, a transmission frame which is linked with the motor clutch outer ring along the circumferential direction is fixedly arranged on the second inner gear ring.

Furthermore, the pedal first-gear input member is a third planet carrier, the pedal second-gear input member is a third inner gear ring, a third planet wheel meshed with the third inner gear ring is arranged on the third planet carrier, and a third sun gear meshed with the third planet wheel is fixedly arranged on the main shaft; and the third inner gear ring is linked with the pedal clutch outer ring along the circumferential direction.

Furthermore, the outer side wall of the clutch inner ring is provided with a positioning plate fixedly connected with the end cover, and the centrifugal driving assembly is arranged on the positioning plate.

Furthermore, the centrifugal driving assembly comprises a centrifugal block and a limiting plate, a release groove matched with the clutch driving piece is arranged in the limiting plate, and a shaft lever connected with the positioning plate penetrates through the centrifugal block;

when the centrifugal block is in a contraction state, the limiting plate limits the clutch driving piece, so that the clutch inner ring, the motor clutch outer ring and the pedal clutch outer ring cannot be driven by the clutch driving piece; after the centrifugal block rotates around the shaft rod and is thrown away, the limiting plate is driven to rotate, the clutch driving piece is embedded into the release groove, and therefore the clutch inner ring, the motor clutch outer ring and the pedal clutch outer ring are driven through the clutch driving piece.

Further, the centrifugal block number is at least two, and the centrifugal driving assembly further comprises an elastic resetting piece connected with only one centrifugal block.

Furthermore, an extension arm is arranged on the limiting plate, a driving rod is arranged on the centrifugal block, and a driving hole matched with the driving rod is formed in the extension arm.

In conclusion, the invention has the following beneficial effects:

1. the hub motor comprises a pedal input mode and a motor input mode, each input mode realizes two-gear mechanical speed change, and the conversion of torque and speed is realized through the mechanical speed change, so that the motor can work and output in a high-efficiency interval, the efficiency is improved, and a rider can realize the conversion of speed and torque under the most comfortable pedal frequency, and the riding experience is improved;

2. the centrifugal driving assembly limits or releases the two-gear clutch assembly according to the rotating speed of the end cover, so that the gear shifting frequency can be reduced, the service life can be prolonged, the riding experience can be optimized, and better and smooth speed change experience can be obtained;

3. the second keeps off motor planetary reduction subassembly and pedal two and keep off the input member sharing and keep off clutch assembly, can reduce part quantity, simplifies the structure, and convenient assembly also can guarantee the accurate nature of control simultaneously.

Drawings

FIG. 1 is a schematic overall structure diagram of a dual-mode two-speed hub motor according to an embodiment;

FIG. 2 is an exploded schematic view of a dual-mode dual-speed hub motor according to an embodiment;

FIG. 3 is a partial cross-sectional view of a dual-mode two-speed hub motor according to an embodiment;

FIG. 4 is a schematic structural diagram of the centrifugal driving assembly and the transmission frame in the embodiment;

FIG. 5 is a first schematic structural view of the centrifugal driving assembly in the embodiment;

fig. 6 is a schematic structural diagram of a centrifugal driving assembly in the embodiment.

In the figure: 1. a main shaft; 21. a hub; 22. an end cap; 31. a first rotor; 32. a second rotor; 4. the first gear motor planetary reduction assembly; 51. a second sun gear; 52. a second planet carrier; 53. a second planet wheel; 54. a second ring gear; 55. a first bearing; 56. a transmission frame; 61. a pawl seat; 62. a pawl; 63. a first ratchet wheel; 64. a second ratchet wheel; 71. a third carrier; 72. a third sun gear; 73. a third planet gear; 74. a third ring gear; 75. a pedal first gear clutch assembly; 76. a second bearing; 77. a third bearing; 78. a fourth bearing; 79. a ring gear; 81. a centrifugal block; 811. a shaft lever; 812. a drive rod; 82. positioning a plate; 821. a limiting frame; 822. positioning a groove; 83. a limiting plate; 831. a relief groove; 832. a limiting groove; 833. an extension arm; 834. a drive aperture; 84. a torsion spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example (b):

a dual-mode two-speed hub motor, refer to fig. 1 to 6, which comprises a main shaft 1, wherein a motor core assembly, a hub 21 and an end cover 22 which are connected with each other are arranged on the main shaft 1; the hub 21 and the end cover 22 are connected through screws to form a complete shell to form a power output part; the movement assembly comprises a first rotor 31 and a second rotor 32 which are connected with each other, the first rotor 31 and the second rotor 32 are connected through screws to realize synchronous rotation to form a motor power input part, and the movement assembly also comprises 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 with the second rotor 32; a pedal speed change input assembly is arranged on the main shaft 1 and comprises 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 with 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 with a centrifugal driving assembly; the centrifugal driving assembly limits or releases the second gear clutch assembly according to the rotating speed of the end cover 22, so that transmission between the second gear motor planetary speed reduction assembly and the end cover 22 and transmission between the pedal second gear input member and the end cover 22 are controlled.

Referring to fig. 1 and 2, the first-gear motor planetary reduction assembly 4 includes a first sun gear, a planetary clutch and a first ring gear, wherein the first sun gear is fixedly connected with the first rotor 31 through a screw, the first ring gear is fixedly embedded in the inner side wall of the hub 21, and the planetary clutch is provided with a first planetary gear engaged with the first sun gear and the first ring gear; in this embodiment, the planetary clutch is connected with the main shaft 1 through a key slot, and the planetary clutch belongs to the prior art and is not described herein.

Referring to fig. 3, the two-gear planetary motor reduction assembly includes a second sun gear 51, a second planet carrier 52 and a second ring gear 54, the second sun gear 51 is fixedly connected with the second rotor 32 through screws, the second planet carrier 52 is fixed with the main shaft 1 through key slot fit, and a second planet gear 53 engaged with the second sun gear 51 and the second ring gear 54 is arranged on the second planet carrier 52; in the present embodiment, a first bearing 55 is provided between the second ring gear 54 and the second carrier 52, and the second ring gear 54 is supported and positioned by the first bearing 55.

Referring to fig. 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 disposed between the clutch inner ring and the motor clutch outer ring and between the pedal clutch outer ring; in this embodiment, the second clutch component adopts a ratchet and pawl structure, and in other optional embodiments, clutches such as a one-way bearing and the like can be adopted, which are not limited herein; specifically, the clutch inner ring is a pawl seat 61, the motor clutch outer ring is a first ratchet wheel 63, the pedal clutch outer ring is a second ratchet wheel 64, the clutch driving piece is a pawl 62, and the elastic piece is a spring ring; the two keep off clutch assembly in this embodiment adopts the structural style of a set of pawl cooperation two ratchet wheels, can reduce part quantity, and the accurate nature of control also can be guaranteed simultaneously to convenient assembly.

Referring to fig. 3 and 4, in this embodiment, the end of the second ring gear 54 is fixedly provided with a transmission frame 56 which is linked with the first ratchet 63 along the circumferential direction, the first ratchet 63 is embedded in the transmission frame 56, specifically, the inner side wall of the transmission frame 56 and the outer side wall of the first ratchet 63 are respectively provided with protrusions (not shown in the drawings) which are arranged at intervals, the protrusions realize circumferential transmission, and simultaneously, the buffering effect can be achieved, and the riding experience is improved.

Referring to fig. 3, in the present embodiment, the first-gear pedal input element is a third planet carrier 71, the second-gear pedal input element is a third ring gear 74, a third planet gear 73 engaged with the third ring gear 74 is arranged on the third planet carrier 71, a third sun gear 72 engaged with the third planet gear 73 is fixedly arranged on the main shaft 1, and in the present embodiment, the third sun gear 72 and the main shaft 1 are integrally formed; the third ring gear 74 is linked with the pedal clutch outer ring along the circumferential direction, specifically, the second ratchet wheel 64 is embedded in the third ring gear 74, and the circumferential transmission structural form between the second ratchet wheel 64 and the third ring gear 74 is the same as the circumferential transmission structural form between the first ratchet wheel 63 and the transmission frame 56, which is not described herein.

Referring to fig. 3, the pedal-first-gear clutch assembly 75 in this embodiment adopts a ratchet-pawl structure, and in other alternative embodiments, the pedal-first-gear clutch assembly 75 may also adopt a clutch such as a one-way bearing, which is not limited herein; specifically, the outer side wall of the third ring gear 74 is provided with a second bearing 76 connected with the pedal first-gear clutch assembly 75, and the pedal first-gear clutch assembly 75 is supported and positioned by the second bearing 76; the second bearing 76 in this embodiment is a needle bearing, which allows control of the radial dimension; a third bearing 77 is arranged between the third planet carrier 71 and the end cover 22, and a fourth bearing 78 is arranged between the third planet carrier 71 and the main shaft 1; the outer side wall of the third planet carrier 71 is provided with a gear ring 79 which is linked with the third planet carrier along the circumferential direction, the gear ring 79 is positioned on the outer side of the end cover 22, and pedal power input is realized through the gear ring 79.

Referring to fig. 3 to 6, the pawl seat 61 is fixedly connected with the end cover 22, specifically, a positioning plate 82 fixedly connected with the end cover 22 is arranged on the outer side wall of the pawl seat 61, and the centrifugal driving assembly is arranged on the positioning plate 82; in the embodiment, the positioning plate 82 and the pawl seat 61 are integrally formed, the positioning plate 82 is fixedly connected with the end cover 22 through screws, and the first ratchet wheel 63 and the second ratchet wheel 64 are respectively positioned at two sides of the positioning plate 82; in this embodiment, a bearing is disposed between the pawl seat 61 and the main shaft 1, and a speed measurement sensing assembly may be disposed between the third planet carrier 71 and the pawl seat 61 to monitor the gear state.

Referring to fig. 3 to 6, the centrifugal driving assembly includes a centrifugal block 81 and a retainer plate 83, a release slot 831 engaged with the pawl 62 is disposed in the retainer plate 83, and a shaft 811 connected to the positioning plate 82 is disposed on the centrifugal block 81; when the centrifugal block 81 is in a contracted state, the limiting plate 83 limits the pawl 62, so that the pawl seat 61, the first ratchet 63 and the second ratchet 64 cannot be driven by the pawl 62; after the centrifugal block 81 rotates around the shaft 811 and is thrown away, the limiting plate 83 is driven to rotate, so that the pawl 62 is inserted into the release groove 831, and the pawl seat 61, the first ratchet 63 and the second ratchet 64 can be driven by the pawl 62.

Referring to fig. 3 to 6, under the elastic force of the spring ring, the engaging end of the pawl 62 can be lifted and then engaged with the first ratchet 63 and the second ratchet 64, and the limit of the limit plate 83 to the pawl 62 is to press the engaging end thereof and cannot be lifted, specifically, a limit groove 832 matched with the engaging end of the pawl 62 is provided in the limit plate 83 in the present embodiment, but in other alternative embodiments, the pawl 62 can be directly pressed by the inner side wall of the limit plate 83, which is not limited herein.

Referring to fig. 5 and 6, in the present embodiment, an extension arm 833 is disposed on the limiting plate 83, a driving rod 812 is disposed on the centrifugal block 81, and a driving hole 834 matched with the driving rod 812 is disposed on the extension arm 833; after the centrifugal block 81 rotates and is thrown away, the driving rod 812 drives the limiting plate 83 to rotate; in the embodiment, the number of the centrifugal blocks 81 is two, the centrifugal driving assembly further includes an elastic resetting member connected to only one of the centrifugal blocks 81, the elastic resetting member is a torsion spring 84 disposed on the positioning plate 82 in the embodiment, and the elastic force of the torsion spring 84 enables the centrifugal block 81 to have a tendency of resetting to a contracted state; the number of the centrifugal blocks 81 is two, and if one centrifugal block 81 is not accurately reset, the limiting plate 83 cannot be accurately reset; the torsion springs with the same specification are different, so that only one torsion spring 84 is arranged to promote the reset of the centrifugal block 81, and the accurate reset of the limiting plate 83 can be ensured, so that the smooth switching between the limiting state and the releasing state is ensured.

Referring to fig. 5 and 6, in the present embodiment, two limiting frames 821 matched with the centrifugal block 81 are disposed on the positioning plate 82, and the limiting frames 821 can radially limit the centrifugal block 81; in this embodiment, the positioning plate 82 is provided with a positioning groove 822 engaged with the centrifugal block 81, and the centrifugal block 81 is embedded in the positioning groove 822 when in a retracted state.

The working principle is as follows:

the hub motor in the embodiment comprises two power input modes, each of which can realize two-gear automatic speed change, and specifically, the working principle is described below by adopting a mode of matching a pedal with an electric power assisting.

When the first gear is in low speed, a rider treads the gear ring 79 to rotate through the chain, so that pedal power input is realized; the gear ring 79 drives the third planet carrier 71 to rotate, and the third planet carrier 71 drives the end cover 22 and the hub 21 to rotate through the pedal first gear clutch assembly 75 to drive the vehicle to advance; after the vehicle runs, the first rotor 31 inputs the rotating speed to the hub 21 through the first gear motor planetary reduction assembly 4 to realize electric power assistance so as to save labor for the vehicle to ride; at this time, the rotation speeds of the hub 21 and the end cover 22 do not reach the speed change point, and the centrifugal block 81 is in the contracted state, the two-gear clutch assembly cannot transmit, so that the rotation speeds of the third ring gear 74 and the second rotor 32 cannot be transmitted to the end cover 22.

When the second gear is at a high speed, the rotating speeds of the hub 21 and the end cover 22 reach a speed change point, the centrifugal block 81 rotates to a throwing-away state, the second gear clutch assembly is switched to a meshing state, and the rotating speeds of the third inner gear ring 74 and the second rotor 32 are transmitted to the end cover 22, so that the motor is automatically switched to the second gear; the rotation speed of the third ring gear 74 is greater than that of the third planet 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 that of the first rotor 31 output to the wheel hub 21 through the first gear motor planetary reduction assembly, so that in the second-gear high-speed state, the planetary clutch and the pedal first-gear clutch assembly 75 are both in an overrunning state.

When the vehicle is in a downhill slope or slides without stepping, the hub 21 and the end cover 22 are still kept in a high-speed state, at the moment, the planetary clutch, the pedal first-gear clutch assembly 75 and the second-gear clutch assembly are all in an overrunning state, when the hub 21 and the end cover 22 are kept in the high-speed state and are stepped again, the centrifugal block 81 is still kept in a throwing state according to the rotating speed of the end cover 22, the motor directly continues to work in the second-gear state without switching gears, and therefore the gear shifting times can be reduced, the service life of the motor is prolonged, and the riding experience is improved.

Claims

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

the method is characterized in that: the main shaft is provided with a first gear motor planetary reduction assembly connected between the first rotor and the hub and a second gear motor planetary reduction assembly connected with the second rotor;

2. The dual-mode two-speed hub motor of claim 1, wherein: the first gear motor planetary reduction assembly comprises:

the first sun gear is fixedly connected with the first rotor;

3. The dual-mode two-speed hub motor of claim 1, wherein: the two-gear clutch assembly comprises a clutch inner ring, a motor clutch outer ring, a pedal clutch outer ring, a clutch driving piece and an elastic piece, wherein the clutch driving piece and the elastic piece are arranged between the clutch inner ring and the motor clutch outer ring as well as between the clutch outer ring and the pedal clutch outer ring; the clutch inner ring is fixedly connected with the end cover, the motor clutch outer ring is connected with the second gear motor planetary reduction assembly, and the pedal clutch outer ring is connected with the pedal second gear input member.

4. The dual-mode two-speed hub motor of claim 3, wherein: the second gear motor planetary reduction subassembly includes:

the second sun gear is fixedly connected with the second rotor;

5. The dual-mode two-speed hub motor of claim 4, wherein: and a transmission frame which is linked with the motor clutch outer ring along the circumferential direction is fixedly arranged on the second inner gear ring.

6. The dual-mode two-speed hub motor of claim 3, wherein: the pedal first-gear input part is a third planet carrier, the pedal second-gear input part is a third inner gear ring, a third planet wheel meshed with the third inner gear ring is arranged on the third planet carrier, and a third sun wheel meshed with the third planet wheel is fixedly arranged on the main shaft; and the third inner gear ring is linked with the pedal clutch outer ring along the circumferential direction.

7. The dual-mode two-speed hub motor of claim 3, wherein: the outer side wall of the clutch inner ring is provided with a positioning plate fixedly connected with the end cover, and the centrifugal driving assembly is arranged on the positioning plate.

8. The dual-mode two-speed hub motor of claim 7, wherein: the centrifugal driving assembly comprises a centrifugal block and a limiting plate, a release groove matched with the clutch driving piece is formed in the limiting plate, and a shaft lever connected with the positioning plate penetrates through the centrifugal block;

9. The dual-mode two-speed hub motor of claim 8, wherein: the centrifugal driving assembly comprises at least two centrifugal blocks, and further comprises an elastic resetting piece connected with only one centrifugal block.

10. The dual-mode two-speed hub motor of claim 8, wherein: the centrifugal block is provided with a centrifugal block, the centrifugal block is provided with a limiting plate, and the limiting 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.