CN217778889U

CN217778889U - Planetary wheel set middle motor and power-assisted bicycle

Info

Publication number: CN217778889U
Application number: CN202220567241.4U
Authority: CN
Inventors: 许源芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-11-11
Anticipated expiration: 2032-03-15

Abstract

The utility model discloses a planetary gear set middle-mounted motor, which comprises a motor component, a treading shaft, a first transmission component and a second transmission component; the motor assembly comprises a motor shaft which is arranged in parallel relative to the treading shaft, a stator and a rotor which is in driving connection with the motor shaft; one end of the treading shaft is in driving connection with a power input assembly, and the other end of the treading shaft is in driving connection with a power output assembly; the treading shaft is connected with the power output assembly through the isolator assembly; the motor assembly is in driving connection with the second transmission assembly through the first transmission assembly; the second transmission component is a planetary gear train arranged on the treading shaft, and the motor component drives the second transmission component to be in driving connection with the power output component through the first transmission component. The middle motor is combined with the pedal force input assembly by using the outer rotor motor and the planetary wheel set mechanism, and the output torque of the structure is high; the volume is small, the manufacture is relatively easy, the manufacture cost is greatly reduced, and the market competitiveness is improved.

Description

Planetary wheel set middle motor and power-assisted bicycle

Technical Field

The utility model relates to a moped especially relates to a put motor and moped in planetary wheel set.

Background

The power-assisted bicycle has the advantages of labor saving, large load, high speed and the like, and has become a substitute tool for people to take a short trip and transport in recent years.

Most moped's in the existing market motor can only provide torsion power output, alleviates the burden of riding passerby, nevertheless does not possess intelligent stepless speed change function, and moped's variable speed mode mainly carries out multistage variable speed through the peripheral hardware derailleur, and this kind of variable speed mode shifts the variable speed in-process and can produce the pause and frustrate and feel because of the chain switches the fluted disc to user to be unfamiliar with shifting, its misoperation can cause the chain to take off the chain scheduling problem, influence the experience of riding.

In order to solve the above problems, patent nos.: CN202010176572.0 is an asynchronous automatic stepless hybrid speed change system and a power-assisted bicycle, wherein a motor is combined with a wheel hub through a harmonic drive speed reduction mechanism, and speed mixing and stepless speed change are realized by using a controller to control the rotating speed of the motor according to the rotating speed of the wheel hub.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a middle motor of a planetary gear set to solve the problems pointed out by the background art.

The utility model is realized by the following technical measures, comprising a motor component, a treading shaft, a first transmission component and a second transmission component; the motor assembly comprises a motor shaft which is arranged in parallel relative to the treading shaft, a stator and a rotor which is in driving connection with the motor shaft; one end of the treading shaft is in driving connection with a power input assembly, and the other end of the treading shaft is in driving connection with a power output assembly; the treading shaft is connected with the power output assembly through a one-way clutch assembly; the motor assembly is in driving connection with the second transmission assembly through the first transmission assembly; the second transmission assembly is a planetary gear set mechanism arranged on the treading shaft, and the motor assembly is in driving connection with the power output assembly sequentially through the first transmission assembly and the second transmission assembly.

Preferably, the first transmission assembly includes a belt, a first belt pulley in driving connection with the motor shaft, and a second belt pulley in rotational connection with the treading shaft, and the second belt pulley is in driving connection with the second transmission assembly.

Preferably, the belt is a toothed belt, and the first pulley and the second pulley are toothed pulleys.

Preferably, the first transmission assembly includes a first gear drivingly connected to the motor shaft, a third gear rotationally connected to the stepping shaft, and a second gear meshed with the first gear and the third gear, respectively.

As a preferred mode, the second transmission assembly includes:

the sun gear is rotationally connected with the treading shaft and is in driving connection with the first transmission assembly;

the planet carrier assembly is rotatably connected with the treading shaft;

the planetary gear is rotationally connected with the planet carrier assembly through a planetary gear shaft, and a first-order planet gear of the planetary gear is meshed with the sun gear;

and the internal gear is rotationally connected with the treading shaft and meshed with the second-order planetary gear of the planetary gear, and the internal gear is in driving connection with the power output assembly.

As a preferable mode, the stepping device comprises an output sleeve which is rotatably connected with the stepping shaft, and the internal gear is integrally formed on the output sleeve; the one-way clutch assembly comprises an one-way clutch lining and an one-way clutch claw, the one-way clutch lining is arranged on the treading shaft, and the one-way clutch claw is fixedly arranged on the inner wall of the output sleeve.

Preferably, the power take-off assembly comprises a chain wheel.

The motor comprises a main shell and a motor shell as a preferable mode; the motor assembly is arranged in the motor shell, and the motor shell is connected with the main shell; first transmission assembly, second transmission assembly set up in the main casing, trample the axle and wear to locate main casing and both ends are stretched out.

As a preferred mode, the device further comprises a controller and a detection device; the detection device is electrically connected with the controller and is used for detecting the rotating speed of the treading shaft; the controller is used for controlling the rotating speed of the motor assembly according to the rotating speed of the stepping shaft fed back by the detection device.

A power-assisted bicycle is provided with any one of the planet gear speed reduction hub middle motor.

The utility model provides a pair of put motor and moped in planetary wheel group: the electric motor has a speed mixing function of a motor rotating speed and a trampling rotating speed, in the working process of the electric motor, a rider tramples a crank to drive a trampling shaft to rotate and drives an output sleeve and a chain disc connected with the end of the output sleeve through an isolator assembly, the chain disc is driven to rotate by a hub, a controller drives a motor shaft according to the speed of the trampling shaft and the speed of a vehicle according to a preset rotating speed value (the preset rotating speed value keeps a preset proportion with the trampling rotating speed), the chain disc is driven to rotate through a first transmission assembly and a planetary wheel set mechanism, a dynamic speed change ratio is kept, the ratio has continuity, a user does not need to shift gears from 0-speed starting to high speed, no pause feeling generated when a mechanical transmission changes the speed is generated, a smooth stepless speed change effect is achieved, and riding experience of the user is improved. The central motor uses an outer rotor motor and a planetary wheel set mechanism to be combined with a pedaling force input assembly, the motor is connected with a sun gear through a toothed belt wheel set, a pedaling crank input is connected to a planetary wheel set assembly, an inner gear ring is in driving connection with an output sleeve or is integrally formed and connected with a driving chain disc, the planetary wheel set enables the speed power of the motor to be combined with the manpower speed power to drive the chain disc to be transmitted to a rear wheel hub, the structure has high output torque and high rotating speed, and the maximum speed can reach 120NTM and 250RPM after being mixed with the rotating speed of a pedaling shaft; a one-way device assembly is arranged between the treading shaft and the output sleeve, and the chain wheel can be smoothly driven under the condition of no electric power assistance or electric power assistance; in addition, the volume is small, the manufacture is relatively easy, the manufacture cost is greatly reduced, and the market competitiveness is improved.

Drawings

Fig. 1 is a schematic sectional structure diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first transmission assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first transmission assembly according to another embodiment of the present invention.

Number and name in the figure: 1. motor shell 2, motor shell cover 3, main shell 4, main shell cover 5, rotor 6, stator 7, rotating speed magnetic ring 8, driver 9, first belt pulley 10, motor shaft 11, dust cover 12, first-stage planetary gear 13, second-stage planetary gear 14, planetary gear shaft 15, support column 16, first support 17, second support 18, fixer 19, second belt pulley 20, sun gear 21, output sleeve 22, internal gear 23, isolator lining 24, isolator claw 25, pedal shaft 26, chain disc 27, chain disc nut 28, belt 29, first bearing 30, third bearing 31, fourth bearing 32, second bearing 33, fifth bearing 34, sixth bearing 35, first gear 36, second gear 37, third gear 38, second gear shaft 39, crank 100 and motor combination

Detailed Description

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

A central motor of a planetary gear set, referring to fig. 1, comprises a motor component, a treading shaft 25, a first transmission component and a second transmission component; the motor component comprises a motor shaft 10 which is arranged in parallel relative to the treading shaft 25, a stator 6 and a rotor 5 which is in driving connection with the motor shaft 10; one end of the treading shaft 25 is connected with a power input component in a driving way, and the other end of the treading shaft is connected with a power output component in a driving way; the treading shaft 25 is connected with the power output component through the isolator component; the motor assembly is in driving connection with the second transmission assembly through the first transmission assembly; the second transmission component is a planetary gear train arranged on the treading shaft 25, and the motor component drives the second transmission component to be in driving connection with the power output component through the first transmission component.

Wherein, the power input component comprises a treading shaft 25 and a crank, and is treaded and driven by a rider; the power output assembly comprises a chain disc 26 which is in driving connection with a wheel, and a chain is arranged on the chain disc 26 and is in driving connection with a hub of a rear wheel; the middle-mounted motor comprises a main shell 3, a motor shell 1, a motor shell cover 2 and a main shell cover 4; the motor component is arranged in the motor shell 1, and the motor shell 1 is connected with the main shell 3; the first transmission component and the second transmission component are arranged in the main shell 3, the treading shaft 25 penetrates through the main shell 3 and two ends of the treading shaft extend out, the motor shaft 10 penetrates through the motor shell 1 and is provided with bearings between the motor shell 1 and the motor shell cover 2, one end of the motor shaft extends out and is connected with the first transmission component, and a bearing is arranged between the extending end and the main shell cover 4; the motor shell and the motor shell 1 are compact in assembly structure and small in size.

It should be understood that the motor assembly of the present embodiment includes an inner rotor 5 and an outer stator 6; the principle is the prior art and is not explained too much.

In this embodiment, referring to fig. 1, the second transmission assembly specifically includes:

a sun gear 20 rotationally connected to the pedal shaft 25 and drivingly connected to the first transmission member; the sun gear 20 is locked and fixed on one side of the belt pulley through a stud, and another first bearing is arranged between the connecting position of the sun gear 20 and the inner wall of the first transmission assembly and the treading shaft 25; the treading shaft 25 is provided with a shaft shoulder at the first bearing.

A planet carrier assembly member drivingly connected to the tread shaft 25; the planet carrier assembly specifically comprises an annular fixer 18 sleeved on a treading shaft 25, and a key is arranged between the fixer 18 and the treading shaft 25; the device also comprises a first bracket 16 and a second bracket 17 which are annular, wherein the first bracket 16 is fixed on one side of the fixer 18; the second bracket 17 is rotatably connected to the outer wall of the tooth holder of the sun gear 20, and a second bearing 32 is arranged between the second bracket and the tooth holder;

a planetary gear rotatably connected to the planet carrier assembly member by a planetary shaft 14, the first order planet gears 12 of the planetary gear being engaged with the sun gear 20; specifically, a planetary wheel shaft 14 penetrates through the middle of the planetary gear, and a bearing is arranged between the planetary gear and the planetary wheel shaft 14; the two ends of the planet wheel shaft 14 are respectively connected with a first bracket 16 and a second bracket 17, a pillar 15 is arranged between the first bracket 16 and the second bracket 17 and on one side opposite to the planet wheel shaft 14, and the structure is kept stable;

an internal gear 22 which is in driving connection with the stepping shaft 25 and is meshed with the second-order planet gears 13 of the planet gears; specifically, in the present embodiment, the internal gear 22 is integrally formed on the output sleeve 21 (or may be in driving connection with the output sleeve 21 in other embodiments), the output sleeve 21 is rotatably connected to the stepping shaft 25, and a third bearing 30 and a fourth bearing 31 are respectively disposed between the output sleeve 21 and the stepping shaft 25; a fifth bearing 33 is arranged between the output sleeve 21 and the main shell 3; a sixth bearing 34 is arranged between the treading shaft 25 and the main shell cover 4; one end of the output sleeve 21 is provided with a chain wheel 26 and locked by a chain wheel nut 27

The working principle of the centrally-mounted motor is as follows: the rider tramples the crank to drive the trampling shaft 25 and drive the one-way clutch assembly; when the motor has no power output, namely the treading force drives the chain wheel 26 to rotate through the one-way assembly; when the motor rotates to output power, the motor shaft 10 drives the output sleeve to rotate through the first transmission component, the second transmission component and the treading power hybrid speed, and the chain wheel 26 is driven to rotate.

Further, the device also comprises a controller and a detection device; the controller is a motor driver 8, and the detection device is electrically connected with the controller and is used for detecting the rotating speed of the treading shaft 25; the controller is used for sending a control signal to the motor driver 8 according to the rotating speed of the treading shaft 25 fed back by the detection device so as to control the rotating speed of the motor component; wherein, the detection device comprises a rotating speed magnetic ring 7, and the rotating speed magnetic ring 7 is respectively arranged on the treading shaft 25 and the motor shaft 10.

Based on the speed mixing function, the middle motor has the speed mixing function, and in the working process of the middle motor, a rider steps on the crank to drive the stepping shaft 25 to rotate when riding without power assistance, and the output sleeve 21 is driven by the isolator assembly 24 to drive the chain disc 26 to rotate;

when a rider rides with electric power assistance, the crank is trampled to drive the trampling shaft 25 to rotate, the trampling shaft drives the planet carrier to drive the planetary wheel set to revolve, the controller drives the motor shaft 10 according to the rotating speed of the trampling shaft 25 and a preset rotating speed value (the preset rotating speed value and the trampling rotating speed keep a preset proportion), the motor shaft drives the sun gear 20 through the first transmission component, the sun gear 20 is in transmission connection with the planetary wheel set and is in power blending with the trampling shaft 25 to drive the inner gear 22 and the output sleeve 21, the chain disc 26 is driven to rotate, a dynamic speed change ratio is kept, the ratio has continuity, the user does not need to shift gears from 0-speed starting to high-speed, and no pause feeling is generated during speed change of the mechanical transmission, the rider can achieve a high-speed stepless speed change effect by means of speed mixing output of electric power and manpower, and rotating speed addition, and the riding experience of the user is improved.

In the present embodiment, referring to fig. 2, the first transmission assembly comprises a belt 28, a first belt pulley 9 in driving connection with the motor shaft 10, and a second belt pulley 19 in rotational connection with the stepping shaft 25, the second belt pulley 19 being in driving connection with the second transmission assembly; wherein, the belt 28 is preferably a toothed belt 28, and the belt pulley is preferably a toothed belt pulley, so that the belt has the advantages of low cost, light weight, small precision requirement and high transmission efficiency; a first bearing 29 is arranged between the second belt pulley 19 and the treading shaft 25;

in other embodiments, referring to fig. 3, the first transmission assembly may also include a first gear 35 in driving connection with the motor shaft 10, a third gear 37 in rotating connection with the pedal shaft 25, and a second gear 36 engaged with the first gear 35 and the third gear 37, respectively, compared to a belt pulley transmission, the use of the gear transmission is dust-free, the fatigue life is significantly longer than that of a belt, but the cost is higher, the weight is heavier, the accuracy requirement is higher, and the transmission efficiency is lower than that of a belt.

Therefore, the dust cover 11 is arranged in the middle motor of the embodiment, and the influence of dust is reduced.

Furthermore, the isolator subassembly includes isolator inside lining 23 and isolator claw 24, and isolator inside lining 23 is connected with trampling axle 25 drive, and isolator claw 24 sets up between output sleeve 21 and isolator inside lining 23, and the transmission of three connects and has the one-way transmission function.

In the non-electric power auxiliary mode, namely, a rider treads a crank to drive the treading shaft 25, drives the isolator liner 23 to rotate and drive the isolator claw 24 to drive the output sleeve 21 to drive the chain disc 26 and the chain disc nut 27 to synchronously rotate and output;

in the speed mixing mode, the output of the motor rotor 5 drives the first belt wheel to drive the toothed belt 28 to drive the large belt wheel to rotate, the sun gear 20 and the second belt wheel synchronously rotate, at the moment, the first-order planetary gear 12, the second-order planetary gear 13 and the planetary gear carrier which is driven by the sun gear 20 to rotate and is connected with the treading shaft in a mixed mode rotate, the rotate speeds of the first-order planetary gear 12 and the second-order planetary gear 13 are mixed and transmitted to be output to the inner gear 22, the driving output sleeve 21 drives the chain disc 26, the chain disc nut 27 and finally the driving chain drives the rear wheel to rotate to run.

It should be understood that in the electric power assisted power mode, the motor assembly drives the chain wheel 26 to rotate through the transmission assemblies and the rotation speed of the treading shaft 25, at this time, the rotation speed of the output sleeve 21 is greater than the rotation speed of the treading shaft 25, the one-way clutch claw 24 is disengaged, the output sleeve is not synchronous with the treading shaft, and the state is different from the state without electric power assisted synchronization.

The middle motor of the embodiment uses the outer rotor 5 motor and the planetary wheel set mechanism to be combined with the pedaling force input assembly, the motor is connected with the sun gear 20 through the tooth-shaped belt wheel set, the pedaling crank input is connected to the planetary wheel set assembly, the inner gear ring is in driving connection with the output sleeve 21 or integrally formed and connected with the driving chain disc 26, so that the speed power of the motor is combined with the speed power of manpower to drive the rear wheel hub, the output torque of the structure is high, and the maximum output torque can reach 120NTM after being mixed with the rotating speed of the pedaling shaft 25; a one-way assembly is arranged between the treading shaft 25 and the output sleeve 21, and the chain wheel 26 can be smoothly driven under the condition of no electric power assistance or electric power assistance; in addition, the volume is small, the manufacture is relatively easy, the manufacture cost is greatly reduced, and the market competitiveness is improved.

The central motor is arranged on a matched bicycle frame, whether a mechanical speed change device is additionally arranged can be automatically selected, and because the planetary gear train mixes the power of the treading rotating speed and the rotating speed of the motor, the speed of the bicycle is far greater than the treading speed under the control, and a rider can easily drive the stepless speed change gear of the bicycle according to the intelligent control of the controller.

It is right above the utility model relates to a description that motor and moped go on in planetary gear set for help understands the utility model discloses, nevertheless the utility model discloses an embodiment does not receive the restriction of above-mentioned embodiment, and any does not deviate from the utility model discloses change, decoration, substitution, combination, simplification made under the principle all should be equivalent replacement mode, all contain within the protection scope.

Claims

1. A middle motor of a planetary gear set is characterized by comprising a motor component, a treading shaft, a first transmission component and a second transmission component; the motor assembly comprises a motor shaft which is arranged in parallel relative to the treading shaft, a stator and a rotor which is in driving connection with the motor shaft; the end part of the treading shaft is in driving connection with a power input assembly, and the middle part of the treading shaft is in driving connection with a second transmission assembly; one end of the treading shaft is connected with a power output assembly; the treading shaft is in transmission connection with the power output assembly through a one-way clutch assembly; the motor assembly is in driving connection with the second transmission assembly through the first transmission assembly; the second transmission assembly is a planetary gear set mechanism arranged on the treading shaft, and the motor assembly is in driving connection with the power output assembly sequentially through the first transmission assembly and the second transmission assembly.

2. The mid-set motor of a planetary gear set as claimed in claim 1, wherein the first transmission assembly comprises a belt, a first pulley in driving connection with the motor shaft, and a second pulley in driving connection with the pedaling shaft, and the second pulley is in driving connection with the second transmission assembly.

3. The mid-motor of a planetary gear set as claimed in claim 2, wherein the belt is a toothed belt, and the first pulley and the second pulley are toothed pulleys.

4. The mid-set motor in a planetary gear set as in claim 1, wherein the first transmission assembly comprises a first gear in driving connection with the motor shaft, a third gear in rotating connection with the pedaling shaft, and a second gear meshed with the first gear and the third gear respectively.

5. The mid-set motor in a planetary gear set according to claim 1, wherein the second transmission assembly comprises: the sun gear is rotationally connected with the treading shaft and is in driving connection with the first transmission assembly;

the planet carrier assembly is connected with the treading shaft in a driving way;

6. The mid-motor of a planetary gear set as claimed in claim 5, wherein the power output assembly comprises a chain wheel and an output sleeve rotatably connected to the treading shaft, and the internal gear is drivingly connected to or integrally formed at one end of the output sleeve; the other end of the output sleeve is in driving connection with the chain disc; the one-way clutch assembly comprises an one-way clutch lining and one-way clutch claws, the one-way clutch lining is in driving connection with the treading shaft, and the one-way clutch claws are in transmission connection with the inner wall of the output sleeve.

7. The mid-set motor of a planetary gear set according to any one of claims 1 to 6, comprising a main housing and a motor housing; the motor assembly is arranged in the motor shell, and the motor shell is connected with the main shell; first transmission assembly, second transmission assembly set up in the main casing, trample the axle and wear to locate main casing and both ends are stretched out.

8. The medium motor of a planetary gear set according to any one of claims 1 to 6, further comprising a controller and a detection device; the detection device is electrically connected with the controller and is used for detecting the rotating speed of the treading shaft; the controller is used for controlling the rotating speed of the motor assembly according to the rotating speed of the treading shaft fed back by the detection device.

9. A power assisted bicycle, characterized in that a planetary gear set built-in motor according to any one of claims 1 to 8 is applied.