Electric assisted bicycle and its built-in motor drive system
Technical field
The present invention relates in motor driver, more particularly to a kind of electric assisted bicycle with torque sensor
Put motor driven systems and electric assisted bicycle.
Background technology
Traditional electric bicycle be all by electric power-assisted that the additional wheel hub electric motor of stampede power of rider is provided and
Obtain the power advanced so that electric booster bicycle will not cause too big burden to the muscle power of rider, and in leisure
It is remaining to reach the effect of body-building.But be due to prior art be mostly with the form of wheel hub motor directly drive front-wheel or after
Wheel, wheel hub motor belongs to slowspeed machine, and relatively low in the moment rotating speed of startup, starting current is larger, imitates at low speeds in addition
Rate is relatively low to cause battery of electric bicycle course continuation mileage not enough;In addition, in the case of pure manpower is trampled, rotor can and then take turns
Sub- transfer, motor coil can produce reverse electromagnetic resistance, cause bicyclist more laborious in the case of pure manpower;Motor output work
Rate can not trample the size of dynamics with manpower and change, and cause motor to be unable to longtime running in high efficient district.
The content of the invention
For defect of the prior art, meet the band power that people typically ride mode it is an object of the invention to provide a kind of
The built-in motor drive system of the electric assisted bicycle of square sensor, the system have volume compact, climbing capacity it is powerful,
The advantages of efficiency high, band torque sensor Intelligent adjustment power.
The built-in motor drive system of the electric assisted bicycle provided according to the present invention, including the first end-cap assembly
101st, the second end-cap assembly 108, housing unit 104, torque sensor 102, electric machine assembly 103, Middle shaft assembly 105, planet subtract
Fast mechanism 106, clutch mechanism 107 and chain wheel chain wheel assembly 109;
First end-cap assembly 101, housing unit 104, the second end-cap assembly 108 are sequentially connected composition drive system shell;
Torque sensor 102, electric machine assembly 103, Middle shaft assembly 105, planetary gear speed reducing mechanism 106, clutch mechanism 107 are arranged on described
In drive system shell;
Moment sensing device assembly 102 is connected to Middle shaft assembly 105, and moment sensing device assembly 102 is used to detect that manpower is produced
Moment of torsion;
Electric machine assembly 103 includes motor stator 5 and motor outer rotor 7;Motor stator 5 is connected to the first end-cap assembly
101, motor outer rotor 7 is connected to Middle shaft assembly 105;
The input of planetary gear speed reducing mechanism 106 is connected on motor outer rotor 7, and output end is connected to clutch pack 107
On;
Clutch pack 107 is connected to Middle shaft assembly 105;
Chain wheel chain wheel assembly 109 is connected to clutch pack 107.
Preferably, moment sensing device assembly 102 includes shaft type torque inductor and/or velocity response sensor, axis group
Part 105 includes axis 1;Shaft type torque inductor, velocity response sensor are respectively arranged on axis 1.
Preferably, electric machine assembly 103 also includes stator support 4, clutch shaft bearing 28 and second bearing 29, Middle shaft assembly
105 include axis 1;
Motor stator 5 is arranged on the first end-cap assembly 101 by stator support 4, and motor outer rotor 7 passes through clutch shaft bearing
28 are connected with axis 1, and motor outer rotor 7 is arranged on stator support 4 by second bearing 29.
Preferably, planetary gear speed reducing mechanism 106 includes primary planet train, secondary planet train, shares internal gear 9 and row
Prong frame 10, shares internal gear 9 and is arranged on the drive system shell;
Primary planet train includes primary centre sun gear 27 and primary planet wheel 26;Primary centre sun gear 27 is installed
As input in the axial face of motor outer rotor 7, primary planet wheel 26 is arranged on planet stent 10, electric machine assembly (103)
Primary centre sun gear 27 is driven to rotate, primary centre sun gear 27 drives planet stent 10 to slow down and transported by primary planet wheel 26
OK, primary speed-down is realized;
Secondary planet train includes secondary center sun gear 24 and secondary planet wheel 25;Secondary center sun gear 24 is installed
On planet stent 10, secondary planet wheel 25 is arranged on the outer ring 11 of the clutch of clutch mechanism 107, the secondary center sun
Wheel 24 rotates with planet stent 10, and drives clutch outer 11 to rotate by secondary planet wheel 25, realizes double reduction;
Primary planet wheel 26 and the external toothing of primary centre sun gear 27 and the internal messing of shared internal gear 9, primary planet wheel 26
Between primary centre sun gear 27 and shared internal gear 9, secondary planet wheel 25 and the external toothing of secondary center sun gear 24,
With the shared internal messing of internal gear 9, secondary planet wheel 25 is arranged between secondary center sun gear 24 and shared internal gear 9.
Preferably, clutch mechanism 107 includes clutch outer 11, clutch centre circle 17, clutch liner 21;Axis group
Part 105 includes axis 1;
Clutch outer 11 is connected with planetary gear speed reducing mechanism 106, and clutch centre circle 17 passes through clutch liner 21 and axis 1
It is connected;
When electric machine assembly 103 by the rotary speed of the drive clutch outer 11 of planetary gear speed reducing mechanism 106 more than chain wheel chain
During 109 rotating speed of wheel assembly, clutch outer 11 and clutch centre circle 17 are engaged, and clutch liner 21 and clutch centre circle 17 are de-
From clutch outer 11 drives clutch centre circle 17 to rotate, and is further driven to the chain wheel sprocket wheel being fitted on clutch centre circle 17
Component 109 rotates, and finally realizes that motor drives;
When the rotating speed that manpower tramples axis 1 is more than chain wheel 109 rotating speed of chain wheel assembly, in clutch liner 21 and clutch
Circle 17 is engaged, and clutch outer 11 and clutch centre circle 17 depart from, and clutch liner 21 drives clutch centre circle 17 to rotate, and enters one
Step drives the chain wheel chain wheel assembly 109 being fitted on clutch centre circle 17 to rotate, and finally realizes that manpower drives.
Preferably, the type of electric machine assembly 103 is external rotor permanent magnetic brushless DC electric machine.
Preferably, planetary gear speed reducing mechanism 106 is connected using two NGW type planetary gear speed reducing mechanisms and shares the knot of ring gear
Structure.
Preferably, clutch mechanism 107 is Wedge-type bidirectional clutch.
Preferably, the flanged face of clutch outer 11 and it is threaded hole and is used for fixing the planet of planetary gear speed reducing mechanism 106
Wheel.
The electric assisted bicycle that the present invention is provided, including above-mentioned built-in motor drive system.
Compared with prior art, the present invention has following beneficial effect:
The intelligence control system that the present invention is combined using torque sensor and controller, manpower tramples pedal crank centering
The torsional deformation caused is put, torque sensor is converted to torsional deformation amount the voltage signal with electric signal linear correlation.Torque
Sensor detects pedal force size, and velocity magnitude is trampled in velocity sensor detection, and two kinds of signals are transmitted to control by communication interface
Device, controller two kinds of signals are analyzed and processed after determine motor output torque and rotating speed, finally realize motor power-assisted and
Manpower tramples the purpose driven jointly, makes ride laborsaving and saves.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the structural representation of the present invention;
Fig. 2 is explosive view of the invention.
In figure:
101 be the first end-cap assembly;
102 be moment sensing device assembly;
103 be electric machine assembly;
104 be housing unit;
105 be Middle shaft assembly;
106 be planetary gear speed reducing mechanism;
107 be clutch pack;
108 be the second end-cap assembly;
109 be chain wheel chain wheel assembly;
1 is axis;
2 be left end cap;
3 be torque sensor;
4 be stator support;
5 be motor stator;
6 be casing;
7 be motor outer rotor;
8 be magnet steel;
9 be shared internal gear;
10 be planet stent;
11 be clutch outer;
12 be 3rd bearing;
13 be right end cap;
14 be chain wheel;
15 be fourth bearing;
16 be chain wheel lock-screw;
17 be clutch centre circle;
18 be 5th bearing;
19 be chain wheel nut;
20 be 6th bearing;
21 be clutch liner;
22 be chain wheel support;
23 be 7th bearing;
24 be secondary center sun gear;
25 be secondary planet wheel;
26 be primary planet wheel;
27 be primary centre sun gear;
28 be clutch shaft bearing;
29 be second bearing;
30 be 8th bearing.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that to the ordinary skill of this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
Motor driven systems of the present invention detect that manpower tramples the moment of torsion of generation by torque sensor 102, according to
Pedal force size controlled motor output driving moment of torsion in proportion, so as to realize that manpower tramples that torque is higher, motor is set according to program
Fixed ratio output torque is bigger, realizes the function of motor power-assisted driving, and driving can ensure manpower jointly with motor power-assisted
Motor is run in high efficient district always, reaches the purpose of energy-conservation.
The embodiment provided with reference to specific accompanying drawing is made to the present invention to be further described:
The present invention includes housing unit 104, electric machine assembly 103, Middle shaft assembly 105, planetary gear speed reducing mechanism 106, clutch
Mechanism 107, the first end-cap assembly 101, the second end-cap assembly 108, torque sensor 102 and chain wheel chain wheel assembly 109.Housing
Component 104 includes shell 6, and the first end-cap assembly 101 includes left end cap 2, and the second end-cap assembly 108 includes right end cap 13.
Electric machine assembly 103 is mainly made up of motor outer rotor 7 and motor stator 5, motor outer rotor 7 and motor stator 5 it
Between be provided with magnet steel 8.
Motor stator 5 is fixed on left end cap 2 by stator support 4, and left end cap 2 is fixed on casing 6, motor outer rotor
7 are connected by clutch shaft bearing 28 with axis 1.
Moment sensing device assembly 102 is fixed on axis 1, and controller detects manpower by moment sensing device assembly 102
The moment of torsion of generation;Planetary gear speed reducing mechanism 106 is connected using two NGW type planetary gear speed reducing mechanisms and shares the structure of ring gear;OK
The input of star reducing gear 106 is fixed on motor outer rotor 7, and output end is fixed on clutch pack 107.
Secondary planet wheel 25 is fixed on clutch pack 107, and clutch centre circle 17 passes through clutch liner 21 and axis 1
It is connected, chain wheel chain wheel assembly 109 is fixed on double rolling key clutch centre circle 17 by chain wheel nut 19.
Described planetary gear speed reducing mechanism 106 has primary planet train and secondary planet train, and primary planet train includes
Primary centre sun gear 27, primary planet wheel 26, shared internal gear 9, there is flange face one end of the primary centre sun gear 27
Feature, is fixed in the axial face of motor outer rotor 7 as input, shares internal gear 9 and is fixed on casing 6, primary planet wheel
26 are fixed on planet stent 10, and motor 103 drives one-level sun gear 27 to rotate, and one-level sun gear 27 passes through primary planet wheel 26
Drive planet stent 10 to run slowly, realize primary speed-down.Secondary planet train includes secondary center sun gear 24, secondary planet
Wheel 25, shared internal gear 9, secondary center sun gear 24 are fixed on planet stent 10, and secondary planet wheel 25 is fixed on clutch
Outer ring 11 on, secondary center sun gear 24 rotates with planet stent 10, pass through secondary planet wheel 25 drive clutch outer
11 rotations, realize double reduction.
Described clutch mechanism 107 is Wedge-type bidirectional clutch, the flanged face in bidirectional clutch outer ring 11 and is carried
Screwed hole is used for fixing planetary gear, and bidirectional clutch centre circle 17 is connected by clutch liner 21 with axis 1, outside bidirectional clutch
Circle 11 is connected with secondary planet wheel 25.
Two-way clutch implementation is as follows:When electric machine assembly 103 passes through the drive clutch outer 11 of planetary gear speed reducing mechanism 106
Rotary speed be more than chain wheel 109 rotating speed of chain wheel assembly when, clutch outer 11 and clutch centre circle 17 are engaged, clutch liner
21 and clutch centre circle 17 depart from, clutch outer 11 drives clutch centre circle 17 to rotate, and is further driven to be fitted in clutch
Chain wheel chain wheel assembly 109 on centre circle 17 rotates, and finally realizes that motor drives;When the rotating speed that manpower tramples axis 1 is more than chain wheel
During 109 rotating speed of chain wheel assembly, clutch liner 21 and clutch centre circle 17 are engaged, and clutch outer 11 and clutch centre circle 17 are de-
From clutch liner 21 drives clutch centre circle 17 to rotate, and is further driven to the chain wheel sprocket wheel being fitted on clutch centre circle 17
Component 109 rotates, and finally realizes that manpower drives.
According to the electric assisted bicycle that provides of the present invention, it uses the built-in motor drive system, therefore can be
Driven under three kinds of different modes:Motor drive mode, manpower ride mode and power-assisted ride mode.
Motor drive mode:After electric machine assembly 103 is powered, the electromagnetic force that motor outer rotor 7 is produced in electromagnetic induction
Effect is lower to drive primary centre sun gear 27 to rotate, and primary centre sun gear 27 drives planet stent 10 by primary planet wheel 26
Operating, secondary center sun gear 24 is fixed on planet stent 10, and secondary center sun gear 24 is operated with planet stent 10, and two
Level center sun gear 24 drives double rolling key clutch outer ring 11 to operate by secondary planet wheel 25, clutch outer 11 and clutch
Device centre circle 17 is now in engagement, and clutch centre circle 17 rotates under the drive of clutch outer 11, clutch centre circle 17
Disengaged position is now in clutch liner 21, axis 1 will not follow motor outer rotor 7 to operate, and chain wheel chain wheel assembly 109 exists
It is fixed together in the presence of chain wheel nut 19 with clutch centre circle 17, chain wheel chain wheel assembly 109 is with clutch centre circle 17 1
Rotation is played, the operating of chain wheel chain wheel assembly 109 is finally realized, reaches the effect of motorized motions, realize electric bicycle in motor
The lower normally travel of driving.
Manpower ride mode:The no power of electric machine assembly 103, electric machine assembly 103 does not work, and manpower pushes pedals drive axis
1, axis 1 drives clutch liner 21, and clutch liner 21 and clutch centre circle 17 are in engagement, clutch centre circle 17 with
Axis 1 to rotate together, now clutch centre circle 17 and clutch outer 11 are in disengaged position, clutch outer 11 will not be with
Axis 1 to rotate, chain wheel chain wheel assembly 109 is fixed together in the presence of chain wheel nut 19 with clutch centre circle 17, chain wheel
Chain wheel assembly 109 rotates together with clutch centre circle 17, finally realizes the operating of chain wheel chain wheel assembly 109, reaches that manpower is ridden
Row purpose, realizes the lower normally travel of manpower driving.
Power-assisted ride mode:This pattern is foregoing both of which collective effect, while the energization operation of electric machine assembly 103,
Also manpower tramples motor to bicyclist.Manpower tramples axis 1, and axis 1 is deformed upon in the presence of pedal force, moment sensing
Device assembly 102 detects the pedal force of axis 1 by testing and analyzing deformation quantity, and controller passes through signal transacting motor component
103 operatings.When electric machine assembly 103 by the rotating speed of the drive clutch outer 11 of planetary gear speed reducing mechanism 106 more than chain wheel chain wheel set
During 109 rotating speed of part, clutch outer 11 and clutch centre circle 17 are engaged, and realize that motor drives;1 rotating speed is big in manpower is trampled
When chain wheel 109 rotating speed of chain wheel assembly, clutch liner 21 and clutch centre circle 17 are engaged, and realize that manpower drives.Ridden in power-assisted
Motor driving and manpower driving alternately, are finally realized motor driving and the superposition of manually driven effect, ridden under row mode
Person it is long-distance ride or climb when will not feel very painstaking.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.