CN1081153C - Auxiliary drive device for electric mopeds - Google Patents

Abstract

The auxiliary driving device of the electric power-assisted vehicle comprises a planetary gear set, a transmission bevel wheel, an auxiliary motor, a sensing element group and a control circuit, wherein a planetary arm of the planetary gear set is connected with a pedal, a planetary gear is connected on a planetary arm pivot, a sun gear is meshed with the planetary gear, and a ring gear is sleeved on the outer edge of the planetary gear and is connected with a front transmission gear disc; the transmission bevel wheel is connected with the sun gear, and the auxiliary motor and the transmission bevel wheel form a one-way transmission structure; the sensing element set is set in the position capable of sensing speed, and the auxiliary motor is driven to operate by sensing the treading speed of the pedal and the speed signal of the bicycle rear wheel to input proper auxiliary power to regulate the operation of the rear wheel.

Description

Auxiliary drive device for electric mopeds

The invention relates to a vehicle driving device, in particular to an auxiliary driving device for an electric bicycle.

Electric bicycles are currently one of the most popular means of transportation. Especially when the concept of environmental protection is widely popular, electric bicycles have gradually replaced motor vehicles and become the mainstream of light-duty means of transportation in the future. However, in the electric bicycle structure, the most important power source is the auxiliary transmission power source such as the electric motor, therefore, the operation of this auxiliary transmission power source must be well controlled, so that the electric bicycle can be operated in the process of running and exercising. In order to achieve the effect of human and vehicle integration. Otherwise, there will only be an increase in power consumption and the safety issues of increased personnel riding operations.

In the general traditional electric bicycle structure, the simple auxiliary power source control method is to install the electric auxiliary transmission power source on the front wheel or rear wheel of the bicycle, and use the electric switch installed on the operating handle as the starting point for the electric auxiliary power source. The control device is used to start the auxiliary power source through the rider's manual operation. The output power of the auxiliary power source is not properly controlled and adjusted, which easily causes unnecessary waste of electric power.

In addition, in terms of relevant prior patent documents, such as U.S. Patent No. 5,704,441, a device that is installed on the pedals of a bicycle with a torque sensor is disclosed to sense the force of the pedals to control The auxiliary power motor transmits auxiliary power to the front or rear wheels of the bicycle. In this way, although it can slightly improve the problem that the auxiliary transmission power of general electric bicycles is output without control, its disadvantage is that the torque of the pedals is used as the control basis for the auxiliary power transmission system, which is very easy to be changed by people. Stepping on the pedals has different force angles, so that the torque generated on the pedals varies from time to time, and the difference in the size of the torque is too large, which may easily cause the output power of the auxiliary motor to be generated from time to time. During the running of the electric bicycle, the torsion of the auxiliary power motor fluctuates and is difficult to control, and the situation of shaking and instability sometimes occurs, thereby increasing unnecessary power consumption.

In addition to the above-mentioned U.S. patent, in addition to its unsmooth power output, which affects the driving operation control, when it is used in a bicycle with a multi-stage transmission, it is also impossible to input the appropriate auxiliary power speed and torque according to the speed of different gears or torque assistance requirements. , so its application range is limited.

The main purpose of the present invention is to provide an auxiliary driving device for an electric bicycle, so that the electric bicycle can input appropriate auxiliary power into the bicycle by means of the stepping speed of the pedals and the rotational speed of the rear wheel. The auxiliary power can smoothly assist the operation of the electric bicycle, achieving the effect of saving effort when riding.

Another object of the present invention is to provide an auxiliary driving device for electric bicycles, which uses the pedaling speed and the rear wheel speed to determine the input auxiliary power, and can be used in conjunction with bicycles with multi-stage speed change functions. According to the different shifting gears, the auxiliary power with appropriate torque and rotating speed can be input into the bicycle as the power to assist driving, thereby increasing its application range.

Yet another object of the present invention is to provide an auxiliary drive device for an electric motor vehicle, wherein the pedal transmission system and the auxiliary power system are independent and independent, and the auxiliary power system is only used as a one-way power transmission. Therefore, when the electric bicycle is towed and reversed, the auxiliary power system is not reversed to generate a reverse current flowing to the control circuit.

The purpose of the present invention is achieved by the following technical solutions.

The auxiliary driving device of the electric motor vehicle of the present invention includes: a planetary gear set, a transmission bevel wheel, an auxiliary motor, a plurality of sensing element groups and a control circuit, and the feature is that the planetary gear set includes a planetary arm, A plurality of planetary gears, a sun gear and a ring gear, wherein the planetary arm is rotatably connected with the pedal spindle, and a plurality of pivots are arranged around the periphery of the planetary arm, and the plurality of planetary gears are respectively connected to the pivots of the aforementioned planetary arm Above, the peripheral edge of the central hole of the aforementioned sun gear and the outer edge of the planetary gear are meshed with each other, and the aforementioned ring gear ring is sleeved on the outer edge of the planetary gear, and the ring gear is also connected with a front transmission gear disc of the bicycle; the transmission umbrella Shaped wheel, its rear end is combined with a one-way ratchet and a hollow shaft, the one-way ratchet is in transmission connection with the sun gear, and the front edge of the hollow shaft is provided with a slit, which is in line with the slit of the sun gear of the planetary gear set Correspondingly, a bearing is socketed, and the pedal mandrel is pierced inside, and the outer front edge of the hollow shaft is sleeved with the aforementioned sun gear; the auxiliary motor is arranged under the front frame tube of the bicycle frame, and the motor The output rotating shaft is connected with an output bevel wheel, and the output bevel wheel is vertically meshed with the aforementioned transmission bevel wheel at 90 degrees, so that a one-way transmission structure is formed between the auxiliary motor and the drive bevel wheel; The measuring element is set on the planetary arm of the planetary gear set, the rear wheel of the bicycle and the appropriate position where the speed can be sensed.

The above object of the present invention can also be further achieved through the following technical measures.

In the auxiliary drive device for the electric motor vehicle of the present invention, the planetary gear set includes a planetary arm, and a connecting hole is provided at the center of the planetary arm, and at least one keyway is provided outwardly of the connecting hole, so as to be connected with a pedal spindle. The key blocks are matched and connected, and the pedal mandrel is passed through the bottom bracket of a bicycle frame. The control circuit includes three voltage stabilizing circuits S1, S2, S3, an operation circuit 700, a controller 800, and a power amplifier 900, wherein the three voltage stabilizing circuits S1, S2, and S3 respectively include voltage stabilizing integrated circuit chips U1, U2 , U3, and the operational circuit 700 is composed of three operational amplifiers U4, U5, U6 and their peripheral components, wherein the operational amplifiers U4 and U5 are respectively connected to form a separate proportional integral network, and the operational amplifier U6 is connected to form a signal phase Adding a network, the controller 800 includes a power control integrated circuit chip U7, and the power amplifier 900 is composed of transistors Q1, Q2 and a thyristor Q3, controlled by the power control signal output by the controller 800, and the operation in the aforementioned operation circuit 700 The output terminal of the amplifier U6 is connected to the input terminal of the power control integrated circuit chip U7 in the controller 800 .

The specific structure of the present invention is given in detail by the following examples and accompanying drawings.

Fig. 1 is the three-dimensional schematic diagram of the decomposition structure of the present invention

Fig. 2 is a schematic sectional view of the structure of the present invention

Fig. 3 is a schematic diagram of the power transmission control system of the present invention

Fig. 4 is the detailed circuit diagram of control circuit of the present invention

Fig. 5A is one of the schematic diagrams of the torsion action of the planetary gear, the sun gear and the planetary arm of the present invention

Fig. 5B is the second schematic diagram of the torque action of the planetary gear, the sun gear and the planetary arm of the present invention

Fig. 6 is one of the schematic diagrams of the application example of the present invention

Fig. 7 is the second schematic diagram of the application example of the present invention

Referring to Fig. 1 and Fig. 2, the auxiliary driving device of the electric bicycle of the present invention includes a planetary gear set 100, a transmission bevel wheel 400, an auxiliary motor 500, a plurality of sensing element groups and a control circuit, the described The planetary gear set 100 includes a planetary arm 10, a plurality of planetary gears 20, a sun gear 30 and a ring gear 40, wherein a connecting hole 11 is provided at the center of the planetary arm 10, and at least a keyway 111 is provided outwardly of the connecting hole 11, so as to Cooperate and connect with the key block 1A set on the pedal spindle A, which is passed through the bottom bracket B1 of a bicycle frame B, so that the planetary arm 10 can be connected to the pedal The stepping on the pedals 2B at both ends of the mandrel A drives the rotation, and the periphery of the planetary arm 10 is provided with a plurality of pivots 12; a plurality of planetary gears 20 are respectively connected to the pivots 12 of the planetary arm 10 to follow the planetary arm 10. The rotation of the sun gear 30 makes a circular orbit; the periphery of the center hole 31 of the sun gear 30 is at least recessed with a keyhole 311, and is meshed with the outer edge of the planetary gear 20 to form a mutual transmission structure; the ring gear 40 is tightly ringed On the outer edge of the planetary gear 20, it is driven to rotate by the circular orbit of the planetary gear 20, and is provided with several holes 41 on the periphery, and is threaded and locked on a screw hole 210 on the periphery of a front transmission gear plate 200 of the bicycle with several bolts 2A. The ring gear 40 is connected with the front transmission gear disc 200; the front transmission gear disc 200 (chain wheel), which is the transmission element of pedal power, can be loaded into the chain 300 to drive the rear wheel C of the bicycle to run (shown in Fig. 6 and Fig. 7 shown); transmission umbrella wheel 400, its rear end is combined with a one-way ratchet 410 and hollow shaft 420, can do the transmission rotation of one direction, and the front edge of hollow shaft 420 is provided with a slot 421 in appropriate position, and this slot 421 and The slits 311 of the sun gear 30 of the planetary gear set 100 correspond to each other, so that a bearing D is sleeved outside the hollow shaft 420 to pass through the center of the front transmission gear plate 200, and a bearing D' is sleeved inside the hollow shaft 420 to connect with the foot The pedal mandrel A is threaded, the outer front edge of the hollow shaft 420 is threaded with the sun gear 30, and a connecting key block 430 is inserted into the corresponding matching keyhole 311 and keyhole 421, so that the sun gear 30 and the hollow shaft 420 are connected to each other, and are subjected to the one-way transmission of the transmission umbrella wheel 400; an auxiliary motor 500 is connected to the ear 4B provided on the periphery of the front frame tube 3B of the bicycle frame B through a connecting plate 510, and is fixed. Below the front frame tube 3B, the auxiliary motor 500 is an assembly of a DC motor and a reducer, and an output umbrella wheel 530 is connected to the output shaft 520, and the output umbrella wheel 530 is 90 to the transmission umbrella wheel 400. degree vertical meshing state (as shown in FIG. 2 ), so that the auxiliary motor 500 can form a one-way transmission structure with the transmission bevel wheel 400, that is, when the auxiliary motor 500 is not powered on, the hollow shaft 420 can be locked. The sun gear 30 is also unable to rotate, so that the pedal 2B is fully and effectively operated.

As shown in Fig. 1 and Fig. 2 above, it is the structural implementation pattern of the auxiliary driving device of the electric motor vehicle of the present invention. This structural implementation diagram is only one of the preferred embodiments listed for the convenience of description of the present invention, and does not limit its scope thereby. .

Referring to Fig. 3, it shows the power transmission control process and system architecture of the auxiliary drive device of the electric motor vehicle of the present invention. The direction of the hollow arrow shows the flow of mechanical power. It includes two transmission paths, one of which is a traditional one. The power process generated when the foot pedal 2B is stepped on, that is, the planetary arm 10 of the planetary gear set 100 drives the ring gear 40, and then drives the rear wheel C to run through a rear wheel transmission E; the other is a mechanical power transmission process , that is, the auxiliary motor 500 drives the sun gear 30 in the planetary gear set 100, then drives the ring gear 40, and then drives the rear wheel C through the rear wheel transmission E to run. The two power transmission processes shown above are allowed to exist simultaneously in the process of transmission in a single direction (that is, forward rotation), that is, the rear wheel C can simultaneously receive the power of the pedal 2B and the power provided by the auxiliary motor. Auxiliary power, while driving forward to run forward.

Referring to FIG. 3, the direction indicated by the solid line arrow is the transmission process of the electronic control signal, including three paths, one of which starts from a sensing element group 600, which is a very common market sensing element group 600. Products for sale are generally composed of motors, photoelectric switches, reed switches, proximity switches, Hall ICs and other components with speed measurement functions, and are installed on the planetary arm 10 to sense and detect the rotational speed of the planetary arm 10. That is, the stepping speed of the pedal 2B, and through a signal ratio amplification circuit K, the signal ratio is amplified by a K value ratio (constant value, its value and calculation method are explained later) to generate an input control signal Er, the The input control signal Er is input into an arithmetic circuit 700; the transmission path of another electronic control signal starts from another sensing element group 600', which has the same shape as the sensing element group 600 and is equipped with Set on the rear wheel C, it can detect the rotational speed of the rear wheel C, and feed back the feedback signal Eh into the operation circuit 700; another transmission path of the electronic control signal starts from the operation circuit 700, The operation circuit 700 generates an error signal Ec according to the input control signal Er and the feedback signal Eh respectively provided by the sensing element group 600 and the sensing element group 600', and sends the error signal Ec to a control circuit. In the device 800, the controller 800 adjusts the value of the output control signal Es according to the value of the error signal Ec, and after being amplified by a power amplifier 900, it drives and controls the operation of the auxiliary motor 500, so that the auxiliary motor 500 can pass through the above mechanical Power transmission process and system, output auxiliary power to the rear wheel C, and feed back to the computing circuit 700 with the electronic feedback signal Eh through the sensing element group 600', and calculate the error signal Ec, so that the controller 800 can adjust the auxiliary motor 500 accurately The output torque and rotational speed reach the target of the original planning and design, that is, by means of this closed-loop control system with automatic feedback adjustment, the purpose of precisely controlling the power output of the electric bicycle by the auxiliary drive device of the electric bicycle of the present invention is achieved.

Referring to Fig. 4, it is the control circuit structure of the electric motor vehicle auxiliary drive device of the present invention, wherein, including several voltage stabilizing circuits S1, S2 and S3, mainly composed of voltage stabilizing ICU1, U2 and U3, to provide three Working power supply V+, V1 and V- of different voltages. The operational circuit 700 shown in Figure 3 is mainly composed of three operational amplifiers U4, U5 and U6, and the network formed by the connection of the operational amplifiers U4 and U5 is respectively a separate proportional integral network for the purpose of Figure 3 The input control signal Er and the feedback signal Eh shown are input, and the operational amplifier U6 is connected to form a signal addition network, so that after the input control signal Er and the feedback signal Eh are processed, the output terminal of the operational amplifier U6 is output as the above figure The error signal Ec shown in 3.

The controller 800 shown in Figure 3 includes a power control integrated circuit chip U7, wherein the error signal Ec is sent to the input terminal IP of the power control integrated circuit chip U7 through a current limiting resistor R, and the power control integrated circuit chip U7 outputs a power control signal from the output terminal OP to the power amplifier 900 according to the input error signal Ec.

The power amplifier 900 shown in FIG. 3 is composed of triodes Q1, Q2 and a thyristor Q3. It is controlled by the power control signal output by the controller 800 to control the output torque, speed and other power of the connected auxiliary motor 500 load. In order to achieve the system control purpose of the present invention, the auxiliary motor 500 can be adjusted to output an appropriate amount of auxiliary power by means of the stepping speed of the pedal 2B and the running speed of the rear wheel C.

In addition, it is worth mentioning that a free wheel diode D1 is connected across the two ends of the auxiliary motor 500 to ensure that the auxiliary motor 500 can guide the reverse current caused by the discharge voltage of the inductive load after the auxiliary motor 500 is powered off. cause damage to other circuit components.

The actual circuit structure of the present invention shown in FIG. 4 above is for the convenience of explaining the control principle and its implementability. The models of the integrated circuits in the control circuit of this embodiment are: U1: NS7805, U2: NS7810, U3: NSLTC111-5, U4: NSLM1111, U5: NSLM1111, U6: NSLM1111, U7: NSLM3524.

Referring to Fig. 5A and Fig. 5B, above-mentioned Fig. 1 to Fig. 4 show the control system and circuit structure diagram of the present invention, and Fig. 5A and Fig. 5B will be used to illustrate the control principle and design principle of the present invention, so as to further confirm The composition of the control system and circuit structure shown in FIGS. 1 to 4 above. First, as shown in FIG. 5A, the relationship between the output torque (torque force) and the rotational speed among the planetary arm 10, the planetary gear 20, and the sun gear 30 in the planetary gear set 100 is illustrated, wherein Wa represents the rotational speed of the planetary arm 10; Wp represents Ws represents the rotational speed of the sun gear 30; Wr represents the rotational speed of the ring gear 40; Wb represents the rotational speed of the rear wheel C; Ta represents the rotational torque of the planetary arm 10; Tp represents the rotational torque of the planetary gear 20; Tr represents the rotational torque of the ring gear 40; Rs represents the radius of the sun gear 30; Rp represents the radius of the planetary gear 20; fap represents the force of the planetary arm 10 on the planetary gear 20; The force of the planetary arm 10; fsp represents the force of the sun gear 30 on the planetary gear 20; fps represents the force of the planetary gear 20 on the sun gear 30; frp represents the force of the ring gear 40 on the planetary gear 20; fpr represents the planetary gear Ns represents the number of teeth of the sun gear 30; Nr represents the number of teeth of the ring gear 40; Nf represents the number of teeth of the front transmission gear plate 200; Nb represents the number of teeth of the rear wheel transmission E. $\frac{w-\mathrm{Wa}}{\mathrm{Wr}-\mathrm{Wa}}=\frac{\mathrm{Nr}}{\mathrm{NS}}--------\left(1\right)$ Mode

Formula (1) shows the desired output speed of the ring gear 40, that is Wr, and the speed Wa of the planetary arm 10, that is, the pedal speed of the pedal 2B, and the speed Ws of the sun gear 30, that is, the auxiliary power of the auxiliary motor 500 Speed has a certain relationship.

Ts=Rs×fsp

Ta=(Rs+Rp)×fap

Tp=(Rs×fps)+(Rs+Rp)×fpa

Ts+Ta+Tp′=0 can be deduced from the above three formulas (2) formula

Next, as shown in FIG. 5B, the relationship between the rotational speed and the rotational torque between the planetary gear 20 and the ring gear 40 is shown, wherein:

Tr=(2Rp+Rs)×frp

Tp2=(2Rp+Rs)×fpr

Obtain Tr+Tp ² =0 from the above two formulas (3) formula so by formula (2) + formula (3) to get the following relational formula:

Ts+Ta+Tp′+Tp ² ＝0 (4) formula

And Tp'+Tp ² =Tp=0, because the planetary gear 20 has rotating speed in the present invention, but has no torque, its effect is equivalent to the follower wheel only does transmission, does not work, so this formula is substituted into the first formula (4) , the following formula (5) can be obtained:

Ts+Ta+Tr＝0 Equation (5)

In addition, according to the energy conservation theorem, the sum of input power and output power is zero, so the following formula can also be deduced:

(TsWs+TaWa)+TrWr＝0 (6) formula

Then multiply the formula (5) by the rotation speed Wa of the planetary arm 10 to get the following formula (7):

TsWa+TaWa+TrWr＝0 Formula (7)

Subtract formula (7) from formula (6) and simplify to get:

After Ts(Ws-Wa)+Tr(Wr-Wa)=0 transposition becomes fraction: $\frac{\mathrm{Ts}}{\mathrm{Tr}}=\frac{\mathrm{Wr}-\mathrm{Wa}}{w-\mathrm{Wa}}$ (8) formula

Comparing with formula (1), we can get:

$\frac{\mathrm{Ts}}{\mathrm{Tr}}=\frac{\mathrm{NS}}{\mathrm{Nr}}$ Therefore, the relationship between the torque and the number of teeth is a fixed ratio, and it can be obtained: Ts:Ta:Tr=Ns:-(Ns+Nr):Nr (9) Therefore, the result obtained from the formula (9) can be obtained for the sun gear The rotational torque Ts of 30 and the rotational torque Ta of the planetary arm 10 are in a fixed proportional relationship, in other words, the pedaling torque input by the pedal 2B and the auxiliary power torque input by the auxiliary motor 500 are also in a fixed proportional relationship .

Therefore, the relationship between the rotational torque, the number of gear teeth and the rotational speed deduced above can be used as the basis for the design of the control system, circuit structure and controller 800 shown in Fig. 3 and Fig. 4, wherein: Wb=K× Wa (10) formula, K is a constant. And consider the state that the present invention is applied to the electric bicycle of rear wheel speed changer E, then:

$\mathrm{wb}=\frac{\mathrm{Nf}}{\mathrm{Nb}}\mathrm{Wr},$ Substituting into formula (10), we get

$\mathrm{Wr}=K\×\mathrm{Wa}\×\frac{\mathrm{Nb}}{\mathrm{Nf}}$ (11) formula

Substitute formula (11) into formula (1) above, and simplify: $w=[1-\frac{\mathrm{Nr}}{\mathrm{NS}}\×(K\×\frac{\mathrm{Nb}}{\mathrm{Nf}}1)]\×\mathrm{Wa}$ make $\mathrm{As}=[1-\frac{\mathrm{Nr}}{\mathrm{NS}}\×(K\×\frac{\mathrm{Nb}}{\mathrm{Nf}}-1)],$ As is a constant. Promptly get Ws=As×Wa (12) that is to say, from the (12) formula, the output speed (Ws) of the auxiliary motor 500 and the input speed (Wa) of the pedal 2B are directly proportional, and the ratio The relationship can be changed by the ratio of the gear teeth of the front transmission gear plate 200 and the rear wheel transmission E, that is, Nb/Nf, that is, the gear shift position. It can be further deduced that the larger the ratio of Nb/Nf, the lower the gear position. Then the As value becomes larger, and the rotation speed Ws of the sun gear 30 is also larger, and correspondingly, the assisting rotation speed output by the auxiliary motor 500 is also higher.

Therefore, the K value mentioned in the above points, such as the K value shown in Figure 4, can be obtained according to the above-mentioned derivation (12) formula, and by the rear wheel C speed Wb, that is, the electric bicycle For example: (I) if the vehicle speed is in the low-speed driving state below 15 km/h, input the auxiliary power of 1:1 fixed value, then the value of K is: $K=1+[(1-\frac{\mathrm{Ta}}{\mathrm{Ts}})\×\frac{\mathrm{NS}}{\mathrm{Nr}}]$ (II) If the vehicle speed is in the range of 15 to 24 km/h, the value of the input auxiliary power assist power is a descending linear function with a negative slope, and the value of K is: $K=1+[(1-\frac{1-(\mathrm{wb}+15)/9}{\mathrm{Ts}}\×\mathrm{Ta})\×\frac{\mathrm{NS}}{\mathrm{Nr}}]$

Therefore, the number of teeth Ns of the sun gear 30 and the gear ratio of the ring gear 40 can be substituted into the formulas (I) and (II) above to obtain a relative K value, such as the state of Ns=8, Nr=21, by The relationship of the (9) formula gets: Ts: Ta=8: (-29) is substituted in (I), (II), obtains respectively: (a) when Wb=0 to 15, k=58/21=2.761 . (b) When Wb=15 to 24, such as Ws=18, K=145/63=2.301 (c) When Wb=>24, K=0, Ws=0, that is, the auxiliary motor 500 does not provide any auxiliary speed and power .

From the above calculation results, a stable and automatically adjusted auxiliary power can be obtained, that is, the difference between the speed at which the rider steps on the pedal 2B and the rotation speed Wb of the rear wheel C is automatically input by the auxiliary motor 500 to perform auxiliary power. Adjustment, so that the rider can achieve twice the result with half the effort, and then improve the driving efficiency of the electric moped.

Referring to Fig. 6 and Fig. 7, the auxiliary drive device of the electric bicycle of the present invention shown in Fig. 1 to Fig. 5B can be implemented in conjunction with various rear wheel transmissions E in practical application and implementation, such as shown in Fig. 4 The rear wheel transmission E is in the form of a common multi-stage transmission gear plate, which is formed by connecting the front transmission gear plate 200 through a chain 300. The magnitude of the input auxiliary power of the auxiliary motor 500 depends on certain factors. However, according to the rider's shifting habits, and according to the calculation principles of the above-mentioned parameters, the rotational speed and torque input by the auxiliary motor 500 when driving in various gears can be arbitrarily designed, which is linear (LINER). The relationship can make the operation of the electric bicycle more smooth and achieve the effect of man-vehicle integration. As shown in Figure 7, the rear wheel transmission E is composed of a multi-stage internal speed changer, and also has the function of multi-stage speed change, but there is no setting of the gear plate. The same design purpose and effect of the auxiliary motor 500 inputting auxiliary power as shown in FIG. 6 further increases the industrial utilization value and application scope of the present invention.

In addition, another feature of the present invention is that the output umbrella wheel 530 of the auxiliary motor 500 and the transmission umbrella wheel 400 are in a one-way transmission structure, that is, the transmission umbrella wheel 400 is provided with a There is a one-way ratchet 410, so that when the overall structure of the present invention is applied to an electric bicycle, it will not cause the auxiliary motor 500 to generate reverse and reverse currents due to the backward pulling of the car, which can ensure that the components in the control circuit of Figure 4 are not be damaged.

To sum up, the auxiliary driving device of the electric motor vehicle of the present invention has the function of automatic and precise adjustment for the driving control of the electric motor vehicle and the input control of the auxiliary power, and can be adjusted according to the rider's pedaling speed and gear shifting. The operating state is used to determine the size of the auxiliary power input, so that the present invention achieves the purpose of integrating the electric bicycle with the rider's man-vehicle, which actually meets the requirements of the invention patent.

Claims (3)

1, a kind of auxiliary device for electric powered bicycle, it comprises: a planet gear cluster, one transmission umbrella shape wheel, one servo-motor, a plurality of sensing element groups and control circuit, it is characterized in that, described compound planet gear comprises a planet arm, a plurality of planetary wheels, one sun gear and an Internal gear, wherein the planet arm is to rotary connection with the stretcher axle, planet arm periphery is provided with a plurality of pivots, these a plurality of planetary wheels are connected on the pivot of aforementioned planet arm, the centre hole periphery and the mutual transmission of planetary wheel outer rim of aforementioned sun gear are meshing, aforementioned Internal gear is located on planetary outer rim, and this Internal gear also is connected with a preceding transmission gear dish of bicycle; Described transmission umbrella shape wheel, its rear end is combined with a single direction ratchet and quill shaft, this single direction ratchet and sun gear are for being in transmission connection, the leading edge of aforementioned quill shaft is provided with a sealing, this sealing is corresponding with the sealing of compound planet gear sun gear, with socket one bearing, wear the stretcher axle in again, outside leading edge of quill shaft and aforementioned sun gear wear; Described servo-motor, it is the front vehicle frame pipe below of being located at cycle frame, the motor output revolving shaft is connected with an output umbrella shape wheel, and it is vertical meshing that this output umbrella shape wheel and aforementioned transmission umbrella shape wheel are 90 degree, make this servo-motor and transmission umbrella shape take turns between formation one unidirectional drive mechanism; Described control circuit comprises three mu balanced circuit S1, S2, S3, arithmetical circuit 700, controller 800 and power amplifier 900, three mu balanced circuit S1 wherein, S2, S3 comprises integrated regulator sheet U1 respectively, U2, U3, arithmetical circuit 700 is by three op amp U4, U5, U6 and peripheral element thereof are formed, wherein op amp U4 and U5 connect to form independent deciding than integrating network road respectively, and op amp U6 connects and composes a signal plus networking, controller 800 comprises power control integrated circuit sheet U7, power amplifier 900 is by transistor Q1, Q2 and thyratron Q3 constitute, the power control signal control of controlled device 800 outputs, the input end of power control integrated circuit sheet U7 in the mouth controller 800 of op amp U6 in the aforementioned arithmetical circuit 700, this Electrical Bicycle can be by the speed of trampling and the rear wheel rotation speed state by stretcher, so that suitable auxiliary power is imported this bicycle.

2, auxiliary device for electric powered bicycle according to claim 1, it is characterized in that, described compound planet gear comprises a planet arm, this planet arm center is provided with a connecting bore, this connecting bore outwards is provided with a keyway at least, with with a stretcher axle on set key piece be connected, this stretcher axle is arranged on the five-way pipe of a cycle frame.

3, auxiliary device for electric powered bicycle according to claim 1 is characterized in that, described a plurality of sensing elements are mounted on planet arm, the bicycle rear of compound planet gear and can sense the appropriate location of speed.

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