CN87205964U - Electromagnetical driver for bicycle - Google Patents

Abstract

The utility model relates to a power assisted device for a bicycle, which does not have any mechanical transmission and friction. Two stators and a winding which are not contacted with the steel ring are fixed on both outer sides of the steel ring of a bicycle through the linear electric motor principle; a battery is used for supplying power, the rotor, namely the steel ring, is driven to rotate directly by the rotary magnetic potential generated by the stators through air gaps, the rotary speed is controlled by a simple hand-control device which has braking effect. The utility model can be arranged on various man power vehicles as assistant power without affecting the structure and the performance of the original vehicle; compared with the prior art in the field, the utility model has the advantages of improved efficiency, long service life, simplified structure and low cost.

Description

Electromagnetical driver for bicycle

The utility model is that a kind of bicycle that does not have any mechanical drive and friction of touching upon helps motion device.

Existing more than 200,000,000 bicycles of China all will play great effect for both urban and rural residents's work in the quite a long period.Suitable other forms of energy in addition on this ancient manpower transportation how, to save muscle power, the upward existing minority plant produced of society goes out Electrical Bicycle at present, these Electrical Bicycles are to provide electric energy by the storage battery that carries with car to electrical motor, electrical motor comes live axle to rotate by mechanical transfer device such as change-speed box, reaches the propelling purpose.But, make that the efficient of whole set is not high owing to the mechanical transfer of more than one-level with by strong friction drive load.In addition direct current carbon brush electrical motors that adopt more, its serviceability and life-span are all influenced, and DC speed regulation inconvenience, if use non-carbonate DC motor instead, then cost improves greatly.

The purpose of this invention is to provide a kind of and existing Electrical Bicycle and compare no any mechanical transfer and speed-changing mechanism, with the load of discontiguous magnetic way of propelling direct drive, and it is simple in structure, the combined efficiency height, long working life, because what controlled is of ac, frequency-adjustable speed-adjustable is very easy, is a kind of later-model linear electric motors on its structure.

The bicycle that the utility model provides helps into device, it is characterized in that its employing linear electric motors principle, two groups of identical special short stators and winding are curved the arc shape the same with steel ring, be fixed on the vehicle frame thick stick in bicycle rim two outsides, do not contact with steel ring, provide the energy by the storage battery that carries with car, DC quantity is transformed into the of ac of two groups of nearly 90 degree of phase phasic difference by a simple control circuit, make two stators produce identical rotating magnetic potential, it is that bicycle rim rotates that magnetic potential is passed air gap promotion rotor, the speed of rotating depends on the frequency of of ac, its frequency can be carried out step-less adjustment on demand by the cyclist in the safety vehicle speed range, when frequency adjustment near zero the time, can play brake action again.This device is installed on Regular Bicycle or other rickshaws, plays the auxiliary power effect.

Performance of the present utility model is elaborated by accompanying drawing.

Fig. 1 is an electrical schematic diagram of the present utility model.

Fig. 2 is an erection plan of the present utility model.

Waveform generation part 1 continuous square wave of output or sinusoidal waveform, and be divided into two-way: the one tunnel directly amplifies through power amplifier 4, at L _Y1And L _Y2The waveform that has obtained on the winding to be exaggerated makes the iron core 6 and 7 to produce the magnetic potential mutually of one in the rotating magnetic potentials; Power amplifier 5 amplifications are delivered in another road behind phase shifting part 3 phase shifts 90 degree, at L _X1And L _X2Obtain the waveform that another has been exaggerated on the winding, another that makes that iron core 6 and 7 produces rotating magnetic potential simultaneously be magnetic potential mutually.L _Y1, ₂With L _X1, ₂Two pairs of windings are also to differ 90 electric degrees on the space in the iron core position, to on iron core 6 and 7, produce two rotating magnetic potentials that the equal and opposite in direction direction is identical respectively like this, this rotating magnetic potential is that the steel ring of bicycle rotates by directly promote rotor 9 than small air gap, and reaches the purpose that helps into.Therefore, the output frequency of waveform generation part 1 has determined the rotative speed of steel ring, frequency modulation part 2 that the output frequency of waveform generation part 1 is changed and regulated at will in a big way.When the output frequency of waveform generation part 1 is zero, iron core 6 and 7 will not produce rotating magnetic potential, only produce two opposite sign but equal magnitude from the magnetic potential of adhesive steel ring 9 radially, to play brake action.Phase shift is all the time near 90 degree when guaranteeing frequency modulation, and coaxial two gang variable capacitor or the variable gang potentiometer or the slide potentiometer group of interlock are adopted in frequency modulation and phase shift.When preventing steel ring 9 rounding rotate and iron core 6,7 direct friction damage, a spot of small rubber roller 8 that exceeds iron core 6,7 slightly is housed, to shield on iron core 6,7.

Bicycles installation at 26 and 28 inches helps into device, further specify with an embodiment, two short stator iron cores are built up by the silicon steel plate of 20 length of a film 200mm, wide 50mm, thick 0.5mm, curve the radian shape the same with steel ring, open 8 grooves on silicon steel plate, and adopt the two poles of the earth linear electric motors of every groove 180 circles of enamel wire coiled of φ=1.0mm, power supply adopts one 12 volts storage battery, form by accompanying drawing assembles up, and just can reach the purpose that helps into fully.

Originally the bicycle help device into is installed is travelled during quiet wind on the asphalt surface of flat-satin, maximum speed reaches per hour 22 kilometers, and about 60 watts of horsepower output except that the starting just of getting on the bus, can no longer need get final product cruising with manpower.

Claims (3)

1, the non-contact type bicycle helps into device, rotor, stator and anchor fitting thereof by storage battery, linear electric motors are formed, it is characterized in that said rotor is made of the steel ring of cycle wheel, stator is made of two iron cores and the winding that are fixed on the bicycle quick both sides and can not contact wheel, iron core is made the arc identical with wheel steel ring radius and is had slotted eye, winding is arranged in the slotted eye, and the frequency-adjustable speed-adjustable control circuit that direct current (DC) can be converted to two groups of 90 ° of phase difference alternating current is connected with storage battery and winding respectively.

2, the bicycle according to claim 1 helps into device, it is characterized in that linkage device is adopted in frequency modulation and the phase shift in the frequency-adjustable speed-adjustable control circuit.

3, the bicycle according to claim 1 or 2 helps into device, it is characterized in that being provided with in the middle of iron core and steel ring rubber roll.

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