CN106627971A - Bicycle speed change system and speed change method for power-assisted bicycle comprising same - Google Patents
Bicycle speed change system and speed change method for power-assisted bicycle comprising same Download PDFInfo
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- CN106627971A CN106627971A CN201611220375.4A CN201611220375A CN106627971A CN 106627971 A CN106627971 A CN 106627971A CN 201611220375 A CN201611220375 A CN 201611220375A CN 106627971 A CN106627971 A CN 106627971A
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- speed
- cone pulley
- bicycle
- speed change
- pulley group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/08—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving eccentrically- mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a bicycle speed change system. By integrating a stepless speed change mechanism into a central system of a power-assisted bicycle, the current riding state is judged by a controller according to sensor information, the speed reducing ratio of manpower and a motor to a rear wheel of the bicycle is automatically adjusted, and thus, the driving motor can operate nearby a rated operation point; an efficient operation area and a torque output range of the central system are broadened, the endurance mileage is prolonged, and the cost of a power-assisted bicycle system is reduced; the central system can automatically judge the whole bicycle operation state according to the bicycle speed, the human foot treading frequency, the foot treading force and the treading direction, and the current power assist rate is automatically adjusted; and operation is easier, more convenient and more humanized, and speed change gears do not need to be adjusted manually.
Description
Technical field
The invention belongs to moped gear design field, and in particular to a kind of bicycle speed change system and bag
Moped method for changing speed containing the system.
Background technology
Moped, is a kind of work of riding between bicycle and electric motor car also known as booster type electric bicycle
Tool, by electric power aid in manpower be supplied to bicycle advance needed for the kinetic energy wanted, it be people pursue it is efficient, convenient, healthy,
The product of the life style of environmental protection.In the system of putting be moped core component, collection moment inspecting, controller module, electricity
Machine is driven in one, controls the normally travel of car load, and at present, moped market abroad, such as German, Japan are more flourishing
Country is popular.In China, electric bicycle still occupies staple market, and most electric bicycles are driven using hub-type
It is dynamic, compared with system is put in using moment inspecting, with obvious inferior position.Hub-type drive by motor be placed in car body front-wheel or
Trailing wheel, causes car load center of gravity forward or rearward, does not meet the mode of riding of people.And road speed is completely dependent on handle control
System, driving force is very limited and affects in the case of the heavy dutys such as contrary wind, climbing.Simultaneously the machinery of this hub-type is tied
Structure also causes the difficulty installed and overhaul to increase, and virtually also increases the potential safety hazard during use.In addition with it is traditional
Cycling mode is different and road speed is too fast, therefore there is also certain danger in traffic safety, and having very much can
Can cause increasing for new traffic problems.
The use of system is put in torque, it will overcome the defect of traditional electric bicycle, with outstanding effect of riding, must
A kind of trend of electric motor car development will be become.
However, existing most using single speed mechanism for putting system in moped on market, it is impossible to enough
The gear ratio of gear-box is adjusted according to road conditions, i.e., only there is single speed reducing ratio, by gear drive, by manpower and motor
Power combines, and the power that people tramples is bigger, and the power of control system motor is also bigger, it is such in put system, high efficient area
Between it is narrow, such as usual motor is operated in rated operation point speed 20km/h, and electric efficiency can reach 80%, climbing when
When speed 5km/h, electric efficiency only has 30% even more little, and max. output torque is true when design of electrical motor
It is fixed, it is impossible to enough real-time adjustments according to road conditions.So not only course continuation mileage is short, affect battery life, and riding for people
Sense is also poor.Solution general in the market is, using doing that electric system and the external speed changer of bicycle combine
Method, is extended the operation area of motor.But the external speed change system for the adopting in the market whether built-in change of flower-drum type
Fast device or external fly wheel system are expensive, install, debug complicated, and need by bicyclist oneself according to different
Road conditions are adjusted, but common bicyclist substantially can seldom adjust speed change system, and a usual gear is ridden always, it is difficult to
Realize the purpose of speed change.
Also there are some companies to utilize gear transmission mode at present, realize two segment speed-changing systems, but two segment speed-changing systems
Belong to step speed regulation, the pause and transition in rhythm or melody sense brought when bicyclist can be clearly felt that speed change in speed change.And because size is empty
Between problem, general speed change hop count do not accomplish many levels, and slewing range is narrow.
Therefore, in view of problem above, it is necessary to a kind of new moped speed change system is proposed, to realize stepless change
The purpose of speed, the speed reducing ratio that crankshaft output and motor output are changed as needed is made a concerted effort, easy to operate, and ensures motor
System is always worked near rated operation point, improves the efficiency of electric system, reduces cost.
The content of the invention
In view of this, the invention provides a kind of bicycle speed change system and the moped comprising the system become
Fast method, by putting system in moped in integrated stepless speed changing mechanism, it is convenient automatic according to user's riding condition
Adjust assist rate, it is ensured that electric system is always worked near rated operation point, improve the efficiency of electric system, reduces cost.
A kind of bicycle speed change system that purpose of the invention is proposed, including drive mechanism, positioned at the driving
The gear of mechanism's output end, the gear exports rotating speed to endless chain transmission for bicycle；
The gear is stepless speed changing mechanism, and the stepless speed changing mechanism includes least one set speed change component, per group
Speed change component includes an active cone pulley group, a driven cone pulley group, is wire-wrapped in the active cone pulley group and the driven cone pulley group
Transmission belt and regulating module, the active cone pulley group and the driven cone pulley group include two cone pulleys being oppositely arranged,
The regulating module acts in active cone pulley group and/or the driven cone pulley group to adjust between two cone pulleys being oppositely arranged
Spacing；
The speed change system also includes being arranged at the input sprocket group of the stepless speed changing mechanism input and output end
Output chain gear group；The drive mechanism includes man power driving mechanism, and the man power driving mechanism includes foot-operated and bent axle, and bent axle turns
To the stepless speed changing mechanism, regulating module drives cone pulley motor adjustment assist rate to the dynamic input sprocket group transmitting torque that passes through, most
Afterwards by output chain gear group transmitting torque to chain wheel.
Preferably：The drive mechanism also include a motor-driven mechanism, the motor-driven mechanism include motor,
The detector of controller and detection user's riding bicycle state, the detector is electrically connected with the controller, the control
Device processed controls motor operating to provide power-assisted according to detector feedback signal.
Preferably：The output end of the motor connects the active cone pulley group of the stepless speed changing mechanism, the driving
One speed reducer is additionally provided between motor and the active cone pulley group, motor operates transmitting torque to the stepless speed changer
Structure, regulating module drives cone pulley motor adjustment assist rate, finally by output chain gear group transmitting torque to chain wheel.
Preferably：The regulating module is acted in the active cone pulley group, the active cone pulley group and driven cone pulley group
Include being fixed in same rotating shaft certain cone pulley and a mantle wheel, the regulating module drives the mantle wheel in active cone pulley group
Along its rotating shaft axial movement, transmission belt changes the direction movement along vertical rotation axis with the spacing between two cone pulleys, adjusts cone pulley group
Relative radius, the mantle wheel of the driven cone pulley group is by the telescopic drive of an elastic component along its rotating shaft axial movement；Or institute
Stating regulating module drives the mantle wheel in driven cone pulley group along its rotating shaft axial movement, and the mantle wheel of the active cone pulley group passes through
The telescopic drive of one elastic component is along its rotating shaft axial movement.
Preferably：The regulating module includes buncher, transmission component and pushing block, and the pushing block fixed cover is located at institute
State on mantle wheel, promote mantle wheel along its rotating shaft axial movement.
Preferably：The transmission component includes a train of reduction gears and a turbine and worm mechanism, and a push rod is stretched out on turbine,
The push rod swings with turbine rotation, and the push rod front end contacts with the pushing block.
Preferably：The regulating module includes a centrifugal globe, and the mantle wheel rear side is fixed with a door, and the door is in
Cone columnar structures, and be disposed opposite to each other with the mantle wheel, centrifugal globe movement is formed between the door and mantle wheel rear side
Chamber, the mobile cavity bulk gradually increases from two lateral centres；When speed increases, centrifugal globe is close to both sides setting, reduces
Assist rate, when speed reduces, centrifugal globe is close to middle setting, increases assist rate.
Preferably：The detector includes detecting the vehicle speed sensor of user's riding speed, to detect that user steps on
The torque sensor of moment of torsion is stepped on, to detect that user tramples the video sensor of stepping on of frequency, and to detect that user tramples direction
Step on in sensor one or more combine.
Preferably：The detector also include a position-detection sensor, the position-detection sensor include magnet ring with
Hall element, the magnet ring may be contained within judging turbine position on the turbine with the Hall element, calculate then
Pushing block position simultaneously feeds back to controller.
A kind of moped method for changing speed, using described bicycle speed change system, the speed change system is setting
System is put in the one of bicycle pedals position, bicycle is different in different operation phase assist rates, and concrete mode is as follows：
Starting stage
Judgment mode：Starting state is first determined whether, the starting threshold value of setting one, speed is gradually risen to the starting from 0km/h
Threshold value；
It is big that the power-assisted that starting stage overcomes inertia and needs compares level road, thus regulating module can when previous parking,
Automatically stepless speed changing mechanism is adjusted to into maximum assist rate, next user rides again can be light, now in put system according to people
The input of power according still further to setting ratio export power, speed less than starting threshold value when, in put system maximum power-assisted output it is little
Export in its specified power-assisted, vehicle slowly starts；
Level road boost phase
Judgment mode：Manpower, step on the speed and speed of frequency and increasing；
Stepless speed changing mechanism speed change during this, is gradually reduced assist rate, and from current state minimum power-assisted is gradually decrease to
Compare state；
Level road slows down
Judgment mode：Manpower reduces, and foot-operated frequency is slack-off, and speed is gradually reduced；
Stepless speed changing mechanism speed change during this, gradually increases assist rate, is gradually increased to when stopping by current state
Maximum assist rate.
The upward slope stage
Judgment mode：Manpower is increased to more than given threshold, but speed increases slow or stops increasing or even reduce；
Stepless speed changing mechanism speed change during this, gradually increases assist rate, is adjusted according to speed, if speed is under constantly
Drop, assist rate needs constantly to increase to maximum assist rate；
The descending stage
Judgment mode：Manpower reduces, and speed speeds；
Stepless speed changing mechanism gradually reduces assist rate by current state during this, until minimum assist rate.
Shutdown phase
Judgment mode：When manpower is gradually reduced or stops trampling or reversely trampling, now speed is progressively smaller until stopping；
In docking process, stepless speed changing mechanism gradually increases assist rate automatically according to current speed, by current state by
Maximum assist rate is gradually increased to, is to ride next time to prepare.
Compared with prior art, the advantage of bicycle speed change system disclosed by the invention is：
Integrated stepless speed changing mechanism, is sentenced by controller according to sensor information in by putting system in moped
Break current riding condition, automatically adjusts the speed reducing ratio of manpower and motor to bicycle rear so that motor is operated in specified
Near operating point, system high efficiency rate operation area and output torque scope are put in expanding, improve course continuation mileage, and to help
Force bike system has saved cost.
The easier hommization of operation, without the need for personnel manually adjusting transmission range, in the system of putting can automatically according to speed,
People's pin tramples frequency, pin and steps on power and trample direction judging car load running status, automatically adjusts current assist rate.
And the system response is rapid, whenever can be automatically adjusted with all-terrain baby, when bicyclist stops riding, automatically
Assist rate is transferred to into maximum, be ride next time it is ready.
System slowdown ratio is put in by adjusting using stepless speed changing mechanism, motor output area is so enabled to and is become big,
Output speed and output torque are significantly improved.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is moped structural representation in prior art.
Fig. 2 is the structural representation of moped speed change system in the present invention.
Fig. 3 is the structural representation of stepless speed changing mechanism part in the present invention.
Fig. 4,5 are two kinds of embodiment figures of regulating module.
Fig. 6 is that manpower exports bang path figure.
Fig. 7 is that motor exports bang path figure.
The title of the digital or alphabetical representative corresponding component in figure：
1st, crank axle 2, input sprocket group 3, stepless speed changing mechanism 4, output chain gear group 5, chain wheel 6, motor
7th, controller 8, decelerator 9, torque sensor
31st, active cone pulley group 32, driven cone pulley group 33, transmission belt 34, regulating module 35, elastic component 341, speed governing
Motor 342, train of reduction gears 343, worm-and-wheel gear 344, push rod 345, pushing block 346, centrifugal globe 347, door
348th, magnet ring 349, Hall element 350, mobile cavity
Specific embodiment
Just as described in the background section, in the market by mutually being tied using the external speed changer of electric system and bicycle
The method of conjunction, is extended the operation area of motor.But the external speed change system that adopts in the market is expensive, peace
Dress, debugging are complicated, and need to be adjusted according to different road conditions by bicyclist oneself, but common bicyclist is substantially very
I haven't seen you for ages adjusts speed change system, and a usual gear is ridden always, it is difficult to realize the purpose of speed change.
The present invention is directed to deficiency of the prior art, there is provided a kind of bicycle speed change system and helping comprising the system
Force bike method for changing speed, by putting system in moped in integrated stepless speed changing mechanism, it is convenient according to user
Riding condition automatically adjusts assist rate, it is ensured that electric system is always worked near rated operation point, improves the effect of electric system
Rate, reduces cost.
Technical scheme will be clearly and completely described by specific embodiment below.Obviously, retouched
The embodiment stated is only a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to the present invention
The scope of protection.
Embodiment 1
Please also refer to Fig. 2, Fig. 3, as illustrated, a kind of bicycle speed change system, including drive mechanism, positioned at driving
The gear of mechanism's output end, gear exports rotating speed to endless chain transmission for bicycle.Wherein the gear is variable speed
Mechanism 3, stepless speed changing mechanism includes least one set speed change component, and every group of speed change component includes that an active cone pulley group 31, is driven
Cone pulley group 32, the transmission belt 33 being wire-wrapped in active cone pulley group and driven cone pulley group and regulating module 34, active cone pulley group 31
With driven cone pulley group 32 including two cone pulleys being oppositely arranged, cone pulley A and mantle wheel B is respectively determined, regulating module is acted on
Adjusting the spacing between two cone pulleys that are oppositely arranged in either one or two cone pulley group.
Preferably, one group of speed change component is adopted in present embodiment, in addition to using one group of speed change component, can be also adopted multigroup
Speed change component, the active cone pulley group of later group speed change component is connected with the driven cone pulley group of previous group speed change component, realizes
Synchronous axial system.Two groups of cone pulley groups in every group of speed change component can be adjusted by regulating module, or any of which cone pulley group is logical
Regulating module regulation is crossed, specific implementation sets as needed, and here is not limited.
Speed change system also includes being arranged at the input sprocket group 2 of the input of stepless speed changing mechanism 3 and the output chain of output end
Wheel group 4；Input sprocket group includes an a drive sprocket C and driven sprocket D with output chain gear group.Specifically, input sprocket group 2
In drive sprocket C be fixed on crank axle 1, rotate with crank and rotate, and rotating speed is exported to driven sprocket D, this is driven
Sprocket wheel D is arranged in the place rotating shaft of active cone pulley group 31, with active cone pulley group synchronous axial system, forms the input of stepless speed changing mechanism
End.Drive sprocket C in output chain gear group 4 is fixed in driven cone pulley group 32, and retinue's mantle wheel group is rotated and rotated, and will be turned
Speed is exported to driven sprocket D, and driven sprocket D is arranged on crank axle 1 and fixes with chain wheel 5 and realizes synchronous axial system, forms nothing
The output end of level gear.The size of wherein drive sprocket and driven sprocket wheel disc sets as needed, and here is not done
Limit.
When making bicycle and using, drive mechanism includes man power driving mechanism, man power driving mechanism include it is foot-operated with bent axle (not
Illustrate), by the transmitting torque of input sprocket group 2 to stepless speed changing mechanism 3, regulating module 34 drives the motion of mantle wheel to crank rotation
Assist rate is adjusted, finally by the transmitting torque of output chain gear group 4 to chain wheel 5, the purpose of variable speed is realized.Therefore, do not beating
Open the design in the case of power-assisted and can individually do bicycle with stepless speed change and use, can creep the larger gradient.
When making moped and using, the drive mechanism also includes a motor-driven mechanism, the motor-driven mechanism bag
Include the detector (not shown) of motor 6, controller 7 and testing staff's riding bicycle state, detector and controller
Electrical connection, controller controls motor operating to provide power-assisted according to detector feedback signal.
Preferably, the output end of motor connects the active cone pulley group 31 of stepless speed changing mechanism, motor and active
It is additionally provided with one speed reducer 8 between cone pulley group, motor runs through after decelerator slows down transmitting torque to stepless speed changing mechanism
3, regulating module drives cone pulley motor adjustment assist rate, finally by the transmitting torque of output chain gear group 4 to chain wheel.
Preferably, regulating module 34 is acted in active cone pulley group 31, and active cone pulley group includes solid with driven cone pulley group
Certain cone pulley and a mantle wheel in same rotating shaft, and regulating module acted on the mantle wheel of active cone pulley group, speed governing group
Part 34 drives the mantle wheel in active cone pulley group 31 along its rotating shaft axial movement, and transmission belt 33 changes with the spacing between two cone pulleys
Move along the direction of vertical rotation axis.The mantle wheel of driven cone pulley group is by the pretension of an elastic component 35, stretching by the elastic component
Drive mantle wheel along its rotating shaft axial movement, with the driving of regulating module the position of transmission belt is changed, so as to realize
The purpose that compression elastic piece or elastic component reversely reset.In present embodiment, the elastic component is preferably spring.In addition regulating module
Can also drive the mantle wheel in driven cone pulley group along its rotating shaft axial movement, the mantle wheel of active cone pulley group is by an elastic component
Telescopic drive is not limited along its rotating shaft axial movement, concrete mode.
Regulating module 34 includes buncher 341, transmission component and pushing block 345, and pushing block 345 is fixed on mantle wheel,
Mantle wheel is promoted along its rotating shaft axial movement.
Transmission component includes a train of reduction gears 342 and a turbine and worm mechanism 343, and a push rod 344 is stretched out on turbine, pushes away
Bar swings with turbine rotation, and the front end of push rod 344 contacts with pushing block 345, and the fixed cover of pushing block 345 is located on mantle wheel, with turbine
Rotating push-rod circuit oscillation, promote pushing block and mantle wheel that the distance adjusted between two cone pulleys is moved along rotating shaft then.In the system
Transmission belt is V bands, certain due to being driven strip length, with the change of spacing between two cone pulleys, relative radius is obtained between two cone pulley groups
Change, speed reducing ratio is adjusted then.
Detector includes detecting the vehicle speed sensor of user's riding speed, to detect that user tramples the moment of torsion of moment of torsion
Sensor, to detect that user tramples the video sensor of stepping on of frequency, and to detect that user tramples the stepping on to sensor of direction.
Detector may include one or more of combinations, and preferred the sensor is respectively provided with, and the signal fed back by detector is sentenced
Disconnected garage's state.
Additionally, detector also includes a position-detection sensor, position-detection sensor includes magnet ring 348 and hall sensing
Device 349, magnet ring may be contained within judging turbine position on turbine, pushing block position calculated then and control is fed back to Hall element
Device processed.Wherein buncher is connected to controller 7 by wire harness, by controller control buncher motion, Hall element 349
Controller 7 is connected to by wire harness, controller calculates the position of current pushing block 345 according to hall signal, it is suitable so as to select
Speed reducing ratio, so as to assist rate is big when realizing that low speed is ridden, outputting torsion is big, and assist rate is little during high-speed cruising, and output speed is fast,
So that motor operates in always high efficiency region.
The invention also discloses moped method for changing speed, bicycle is in different operation phase assist rates difference, tool
Body assist rate as needed depending on, here is not limited.Preferably at most assist rate is 2 in the present embodiment:1, minimum assist rate is
1:1.Adjust as follows in the different operation phase by taking the assist rate as an example：
Starting stage
Judgment mode：First determine whether starting state, set one starting threshold value as 6km/h, speed from 0km/h gradually rise to
The starting threshold value；The threshold size is optionally adjusted, and is not limited.
The power-assisted that starting stage generally overcomes inertia and needs compares that level road is larger, but auxiliary if giving larger motor suddenly
Power-assisted, it is more likely that make car generation out of control dangerous, so control system can be when previous parking, automatically by stepless speed changer
The assist rate of structure is adjusted to 2:1, so next user rides again can be light, now motor according to the input of manpower according still further to one
Fixed scale output power, but when speed is less than 6km/h, maximum power-assisted can only export 70%, and anti-stopping power is excessive, makes
Into accident, user is allowed to ride comfortably, it is slow to start.The maximum output efficiency in this stage as needed can sets itself, here is not
It is limited.
Level road boost phase
Judgment mode：Manpower, step on the speed and speed of frequency and increasing.
Stepless speed changing mechanism speed change during this, is gradually reduced assist rate, and from current state minimum power-assisted is gradually decrease to
Than 1:1.
Level road slows down
Judgment mode：Manpower reduces, and foot-operated frequency is slack-off, and speed is gradually reduced.
Stepless speed changing mechanism speed change during this, gradually increases assist rate, is gradually increased to when stopping by current state
Maximum assist rate 2:1.
The upward slope stage
Judgment mode：Manpower is increased to more than given threshold, but speed increases slow or stops increasing or even reduce；
Stepless speed changing mechanism speed change during this, gradually increases assist rate, is adjusted according to speed, if speed is under constantly
Drop, assist rate needs constantly to increase to maximum assist rate 2:1.
The descending stage
Judgment mode：Manpower reduces, and speed speeds.
Stepless speed changing mechanism gradually reduces assist rate by current state during this, until minimum assist rate 1:1.
Shutdown phase
Judgment mode：When manpower is gradually reduced or stops trampling or reversely trampling, now speed is progressively smaller until stopping.
In docking process, stepless speed changing mechanism gradually increases assist rate automatically according to current speed, by current state by
Gradually increase to maximum assist rate 2:1, it is to ride next time to prepare.
By detector real-time detection speed, moment of torsion, step on frequency, step on to etc. multiple signals, can accurately judge bicycle institute
The running status at place, controller can adjust the assist rate of stepless speed changing mechanism according to current state, be ridden demand with meeting user.
Concrete case
Manpower is input into 9NM on bent axle, and the speed reducing ratio of input sprocket group is 1:3, two grades of inputs are then 3NM.
Motor power output 0.5NM, decelerator speed reducing ratio is 10；1 two grades of input powers are then 5NM.
So, stepless speed changing mechanism input is then 8NM with joint efforts, but stepless speed changing mechanism basis under buncher effect
Speed adjusts speed reducing ratio can be from 1:1 to 2:1, so that the driven pulley cone pulley group power of stepless speed changing mechanism output can be changed into
8NM to 16NM.
Final stage output chain gear group speed reducing ratio is 2：1, so as to the final power output of the system is in the situation of same input power
Under, 32NM can be always changed to from 16NM, and the realization of the function only needs to adjust buncher rotation so that variable speed
Transmission belt is operated under different conditions in mechanism, realizes that speed reducing ratio is adjusted.
Concrete regulative mode is as follows：
Buncher realizes that rotating speed is reduced after train of reduction gears and two sections of speed governing of worm-and-wheel gear, moment of torsion increase,
Pushing block is translated eventually through turbine rotation so that drive belt position is moved, but because transmission strip length is fixed, actively
The relative radius of cone pulley group and driven cone pulley group change, that is, realize speed reducing ratio change.
Concrete case：
Governor motor input power is 200gcm, then power output is 16kgcm after final deceleration, and the brachium of push rod is
0.5cm, then thrust is 8 ㎏ cm.
As shown in fig. 6, when making bicycle and using, left foot and right crus of diaphragm all by torque sensor, afterwards by being input into chain
To stepless speed changing mechanism 3, regulating module 34 drives mantle wheel motor adjustment assist rate to the transmitting torque of wheel group 2, finally by output
The transmitting torque of chain wheel set 4 is to chain wheel 5.Wherein, stepless speed changing mechanism part is by speed reducing ratio 1:1 is changed into 2:1, so as to realize that manpower becomes
Speed, that is, turning off motor power-assisted people and ride can also go up very big slope.
To sum up, the stepless speed changing mechanism for being carried by using the system changes the speed reducing ratio of people's activity of force and motor output
With joint efforts, the necessity to the rearmounted gear of car load can be eliminated.
Efficiency：
By speed governing so that motor is operated near rated operation point so that motor always works at efficiency
The high point of comparison, which decreases energy consumption, increased endurance.
It is easy：
The easier hommization of operation, it is not necessary to artificially adjust transmission range, in the system of putting can be automatically according to speed, people's pin
Frequency is trampled, pin steps on power to judge that whole vehicle state is, in level road, to go up a slope, and the state such as descending or acceleration, deceleration is automatically adjusted and worked as
Front assist rate.
And the system response is rapid, it is generally the case that external speed change or internal speed-changing are required to the response time of 1S or so, and
And need to be adjusted in riding condition, halted state can not adjust speed changer.
But whenever the present invention can be automatically adjusted with all-terrain baby, when bicyclist stops riding, will slow down automatically
Frequently be transferred to maximum, be ride next time it is ready.
System slowdown ratio is put in adjusting by stepless speed changing mechanism, motor output area is so enabled to and is become big, such as existed
Without putting system output maximum (top) speed 100RPM in the case of speed adjusting gear, peak torque 80NM, after having speed adjusting gear, in put
System output maximum (top) speed rises to 120RPM by 100RPM, and moment of torsion 80NM rises to 100NM.To sum up, by arranging stepless change
After fast mechanism, in put the output performance of system and be highly improved, concrete numerical value changes according to physical dimension and changes, here
It is not limited.
Embodiment 2
Fig. 5 is referred to, remaining is same as Example 1, difference is that regulating module includes a centrifugal globe 346, mantle
Wheel rear side is fixed with a door 347, and door is disposed opposite to each other in cone columnar structures with mantle wheel, between door and mantle wheel rear side
A centrifugal globe mobile cavity 350 is formed, mobile cavity bulk gradually increases from two lateral centres；When speed increases, centrifugal globe is leaned on
Arrange to both sides, reduce assist rate, when speed reduces, centrifugal globe is close to middle setting, increases assist rate.
In addition to above-mentioned embodiment, regulating module can also be the actuating unit of other forms, can adopt feed screw nut machine
Structure, cylinder/Driven by Hydraulic Cylinder mechanism, electric pushrod drive mechanism or cam drive mechanism etc., are driven by any of the above-described mechanism
The movement of mantle wheel adjusts assist rate, and specific implementation can be according to using depending on needs, and here is not limited.
Supplementary notes：Mantle wheel in accompanying drawing 2,3,5,6,7 is the schematic diagram under two states.
The invention discloses a kind of bicycle speed change system, by putting system in moped in it is integrated stepless
Gear, current riding condition is judged by controller according to sensor information, after automatically adjusting manpower and motor to bicycle
The speed reducing ratio of wheel so that motor is operated near rated operation point, put in expanding system high efficiency rate operation area and
Output torque scope, improves course continuation mileage, and has saved cost for moped system.
The easier hommization of operation, without the need for personnel manually adjusting transmission range, in the system of putting can automatically according to speed,
People's pin tramples frequency, pin and steps on power and trample direction judging car load running status, automatically adjusts current assist rate.
And the system response is rapid, whenever can be automatically adjusted with all-terrain baby, when bicyclist stops riding, automatically
Assist rate is transferred to into maximum, be ride next time it is ready.
System slowdown ratio is put in by adjusting using stepless speed changing mechanism, motor output area is so enabled to and is become big,
Output speed and output torque are significantly improved.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (10)
1. a kind of bicycle speed change system, including drive mechanism, positioned at the gear of the drive mechanism output end, it is described
Gear exports rotating speed to endless chain transmission for bicycle；It is characterized in that：
The gear is stepless speed changing mechanism, and the stepless speed changing mechanism includes least one set speed change component, every group of speed change
Component includes an active cone pulley group, a driven cone pulley group, the biography being wire-wrapped in the active cone pulley group and the driven cone pulley group
Dynamic band and regulating module, the active cone pulley group and the driven cone pulley group include two cone pulleys being oppositely arranged, described
Between regulating module is acted in active cone pulley group and/or the driven cone pulley group to adjust between two cone pulleys that are oppositely arranged
Away from；
The speed change system also includes being arranged at the input sprocket group of the stepless speed changing mechanism input and the output of output end
Chain wheel set；The drive mechanism includes man power driving mechanism, and the man power driving mechanism includes foot-operated and bent axle, and crank rotation leads to
Input sprocket group transmitting torque is crossed to the stepless speed changing mechanism, regulating module drives cone pulley motor adjustment assist rate, finally leads to
Output chain gear group transmitting torque is crossed to chain wheel.
2. bicycle speed change system as claimed in claim 1, it is characterised in that：The drive mechanism is also driven including a motor
Motivation structure, the motor-driven mechanism includes the detector of motor, controller and detection user's riding bicycle state,
The detector is electrically connected with the controller, and the controller controls motor operating to carry according to detector feedback signal
For power-assisted.
3. bicycle speed change system as claimed in claim 2, it is characterised in that：The output end connection institute of the motor
The active cone pulley group of stepless speed changing mechanism is stated, between the motor and the active cone pulley group one speed reducer is additionally provided with, driven
Dynamic motor rotation transmitting torque to the stepless speed changing mechanism, regulating module drive cone pulley motor adjustment assist rate, finally by
Output chain gear group transmitting torque is to chain wheel.
4. bicycle speed change system as claimed in claim 2, it is characterised in that：The regulating module acts on the active
In cone pulley group, the active cone pulley group is with driven cone pulley group including the certain cone pulley and a mantle being fixed in same rotating shaft
Wheel, the regulating module drives the mantle wheel in active cone pulley group along its rotating shaft axial movement, and transmission belt is between two cone pulleys
Spacing changes the direction movement along vertical rotation axis, adjusts the relative radius of cone pulley group, and the mantle wheel of the driven cone pulley group passes through
The telescopic drive of one elastic component is along its rotating shaft axial movement；Or the regulating module drives the mantle wheel in driven cone pulley group along it
Rotating shaft is moved axially, and the mantle wheel of the active cone pulley group is moved axially by the telescopic drive of an elastic component along its rotating shaft.
5. bicycle speed change system as claimed in claim 4, it is characterised in that：The regulating module include buncher,
Transmission component and pushing block, the pushing block fixed cover promotes mantle wheel along its rotating shaft axial movement on the mantle wheel.
6. bicycle speed change system as claimed in claim 5, it is characterised in that：The transmission component includes a reduction gearing
Group and a turbine and worm mechanism, stretch out a push rod on turbine, the push rod swings with turbine rotation, the push rod front end and institute
State pushing block contact.
7. bicycle speed change system as claimed in claim 4, it is characterised in that：The regulating module includes a centrifugal globe,
The mantle wheel rear side is fixed with a door, and the door is disposed opposite to each other, the gear in cone columnar structures with the mantle wheel
A centrifugal globe mobile cavity is formed between lid and mantle wheel rear side, the mobile cavity bulk gradually increases from two lateral centres
Plus；When speed increases, centrifugal globe is close to both sides setting, reduces assist rate, and when speed reduces, centrifugal globe is close to middle setting, increases
Big assist rate.
8. bicycle speed change system as claimed in claim 2, it is characterised in that：The detector includes detecting user
The vehicle speed sensor of riding speed, to detect that user tramples the torque sensor of moment of torsion, to detect that user tramples frequency
Video sensor is stepped on, and is combined to one or more in sensor to detect that user tramples stepping on for direction.
9. bicycle speed change system as claimed in claim 6, it is characterised in that：The detector is also detected including a position
Sensor, the position-detection sensor includes magnet ring and Hall element, and the magnet ring is respectively provided with the Hall element
Turbine position is judged on the turbine, pushing block position is calculated then and controller is fed back to.
10. a kind of moped method for changing speed, it is characterised in that：Using the bicycle described in any one of claim 2-9
With speed change system, the speed change system is that system is put in be arranged at bicycle pedals position one, and bicycle is in the different operation phase
Assist rate is different, and concrete mode is as follows：
Starting stage
Judgment mode：Starting state is first determined whether, the starting threshold value of setting one, speed is gradually risen to the starting threshold value from 0km/h；
The power-assisted that starting stage overcomes inertia and needs compares level road greatly, so regulating module can be when previous parking, automatically
Stepless speed changing mechanism is adjusted to into maximum assist rate, next user rides again can be light, now in put system according to manpower
Input according still further to setting ratio export power, speed less than starting threshold value when, in put system maximum power-assisted output less than its
Specified power-assisted output, vehicle slowly starts；
Level road boost phase
Judgment mode：Manpower, step on the speed and speed of frequency and increasing；
Stepless speed changing mechanism speed change during this, is gradually reduced assist rate, and from current state minimum assist rate shape is gradually decrease to
State；
Level road slows down
Judgment mode：Manpower reduces, and foot-operated frequency is slack-off, and speed is gradually reduced；
Stepless speed changing mechanism speed change during this, gradually increases assist rate, and by current state maximum when stopping is gradually increased to
Assist rate.
The upward slope stage
Judgment mode：Manpower is increased to more than given threshold, but speed increases slow or stops increasing or even reduce；
Stepless speed changing mechanism speed change during this, gradually increases assist rate, is adjusted according to speed, if speed is constantly declining,
Assist rate needs constantly to increase to maximum assist rate；
The descending stage
Judgment mode：Manpower reduces, and speed speeds；
Stepless speed changing mechanism gradually reduces assist rate by current state during this, until minimum assist rate.
Shutdown phase
Judgment mode：When manpower is gradually reduced or stops trampling or reversely trampling, now speed is progressively smaller until stopping；
In docking process, stepless speed changing mechanism gradually increases assist rate automatically according to current speed, is gradually increased by current state
Big extremely maximum assist rate, is to ride next time to prepare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611220375.4A CN106627971A (en) | 2016-12-26 | 2016-12-26 | Bicycle speed change system and speed change method for power-assisted bicycle comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611220375.4A CN106627971A (en) | 2016-12-26 | 2016-12-26 | Bicycle speed change system and speed change method for power-assisted bicycle comprising same |
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| CN106627971A true CN106627971A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611220375.4A Pending CN106627971A (en) | 2016-12-26 | 2016-12-26 | Bicycle speed change system and speed change method for power-assisted bicycle comprising same |
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| CN115180059A (en) * | 2022-07-05 | 2022-10-14 | 苏州万佳电器有限公司 | Fall warning device and method, two-wheel vehicle and storage medium |
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Application publication date: 20170510 |