CN2042449U

CN2042449U - Electromagnetic booster bicycle

Info

Publication number: CN2042449U
Application number: CN88220835.7U
Authority: CN
Inventors: 马卫国; 马兴国
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-12-12
Filing date: 1988-12-12
Publication date: 1989-08-09

Abstract

The utility model relates to a bicycle which is provided with an additional electromagnetic boosting mechanism. The bicycle is suitable for the reconstruction of the existing bicycle motorization and the design of novel electric bicycles. The outer top ends of bicycle spokes are provided with a plurality of ferroboron permanent magnets along the circumferential directions of wheels in equal distance. An iron core coil is arranged on a bicycle frame so as to form an electromagnetic device. When the wheels rotate, the permanent magnets and the wheels can receive the function of continuous fluctuating thrust by controlling the current direction of the coil properly during the permanent magnets passing through an air gap of the iron core. The bicycle has the advantages of simple structure, high efficiency and no influence on the combination property of the existing bicycles.

Description

Electromagnetic booster bicycle

The utility model relates to a kind of bicycle that the additional electromagnetic boosting mechanism is housed.

Because Chinese population is numerous, road traffic condition is backward relatively, bicycle as the most general traffic means of transport with long-term existence.In order to solve the bicycle bigger problem that consumes one's strength, existing many people have carried out the trial (for example domestic patent 87102101,86203980,86200885, US Patent 2586,702 etc.) of motor-drivenization of bicycle.Its mode roughly has the motor drives friction wheel to compress bicycle to drive in addition, and electrical motor drives by machine driven system, and electrical motor direct drive wheel etc. is several.But generally there is following problem in these schemes:

1. complex structure often need change the bicycle body structure, is unfavorable for transforming on existing bicycle.

2. conversion of electricity-machine and mechanical drive combined efficiency are not high, often cause additional equipment volumes such as storage battery, electrical motor, weight excessive, make the intensity generation problem of cycle frame.If the change car body, the then actual battery-operated motor cycle that becomes can not have been can be regarded as the transformation of bicycle.

3. driven by power and manpower drive and are not complementary, and most schemes are actual to be that the complete motorization of bicycle is considered that from the existing transportation condition of China unsuitable large-scale popularization is used.

At above problem, the utility model has designed a kind of bicycle that the additional electromagnetic boosting mechanism is housed, it has and does not change original bicycle structure fully, driven by power combined efficiency height, energy consumption is little, additional assist system volume weight is little, and the speed that does not change unpowered vehicle, the advantage of basic ride characteristic such as braking.

Principle of work of the present utility model is as follows with reference to description of drawings:

Fig. 1 is the master layout of boosting mechanism on bicycle.

Fig. 2 is permanent magnet mounting means scheme drawing on spoke.

Fig. 3 is the control circuit schematic diagram.

Fig. 4 is the scheme drawing of the direction of the winding current and permanent magnet movement position relation.

As shown in Figure 1, at the bicycle spoke outer end along wheel circumferentially equidistantly by filling some blocks of iron boron (Ne-Fe-B) powerful permanent body, simultaneously, one calutron that is made of iron-core coil is fixed on the cycle frame, so that when vehicle wheel rotation, permanent magnet fixed thereon passes the air-gap of electromagnetic mechanism successively. According to the magnetic interaction principle, if alive in the coil, in the segment limit before and after permanent magnet passes through air-gap, the magnetic field of electromagnetic mechanism and the magnetic field interaction of permanent magnet can produce along the circumferential active force of wheel. Therefore, as long as the sense of current in the suitable control coil just can make the permanent magnet that is fixed on the wheel be subjected to all the time active force along its rotation direction when passing through air-gap, thereby produce driving moment at wheel, reach the purpose of boosting.

The utility model can be by following scheme implementation: as shown in Figure 1, the iron-core coil of boosting mechanism ［ 1 ］ is fixed on the cycle frame, and wherein iron core is changed by the thick silicon steel plate of 0.5mm.The sectional area of iron core is not less than 25 * 25mm.One excitation coil ［ 6 ］［ 7 ］ respectively is housed on the iron core of wheel both sides, and each coil is made of copper cash coiling 1200 circles of φ 1.0.Permanent magnet ［ 4 ］ is selected iron boron (Ne-Fe-B) Cylinder of φ 20 * 12 for use, and its mounting means such as Fig. 2 on bicycle spoke shows.The power supply of boosting mechanism ［ 5 ］ is selected the storage battery of 6V, 8A/hr for use, and its profile can be considered by dual mode: the first is made the prolate square by bicycle tail-bracket size, is installed on the tail-bracket.It two is to do the growth Cylinder, is installed on the vehicle seat support ［ 2 ］ among Fig. 1, ［ 3 ］ installation site for ［ 2 ］, ［ 3 ］ two dry-reed tubes among circuit theory Fig. 3.

The principle of boosting mechanism control circuit is described as follows by Fig. 3: ［ 2 ］, ［ 3 ］ are two reed switch relays among the figure, and hollow triangle is represented open contact, and solid triangle is represented normally closed contact.［ 2 ］, the installation site of ［ 3 ］ two dry-reed tubes should debug with the process of following narration and conform to: at first, when permanent magnet does not advance the electromagnetic mechanism air gap and apart from air gap when far away, the open contact of ［ 2 ］, ［ 3 ］ all disconnects, no current flows through in this moment coil.Along with the rotation of wheel, when permanent magnet is close to the position (method of available static debugging is determined) that begins to enter the magnetic field interaction scope to air gap, the open contact closure of ［ 2 ］, coil current is connected, and its direction is shown in Fig. 4 a.When permanent magnet further moves in air gap, the open contact closure of ［ 3 ］.When the permanent magnet line of centers arrives a certain optimum position (can determine by test) of fast and core magnetic pole central lines, ［ 2 ］ open contact disconnects, the normally closed contact closure, ［ 3 ］ open contact still remains closed, and the direction of current in the coil is shown in Fig. 4 b at this moment.When permanent magnet travels forward when breaking away from the effective range of core field substantially again, the open contact of ［ 3 ］ disconnects, and coil returns to not powering state.Above process circulation is carried out, and makes wheel be subjected to the effect of thrust continuously.

Foregoing circuit is actual to be a LR circuit, because shortened current"on"time when vehicle wheel rotational speed raise, permanent magnet strengthens by the inverse electromotive force that air gap produces in coil simultaneously, for guaranteeing that the iron-core coil magnetic pole produces enough big magnetic induction density, when bicycle speed improves, require power supply voltage to do corresponding rising.The dial switch of a voltage has been installed on the right handlebar of bicycle for this reason, has been comprised three different voltage gears and a zero voltage gear, in order to adapt to the manual switch that different bicycle speeds and conduct power up and cut off the power supply.Corresponding with dial switch, the pressure regulation part ［ 8 ］ in the control circuit (Fig. 3) realizes the adjustment of voltage according to the residing gear of dial switch.Divide the selection of retaining voltage levvl, follow following principle: guarantee that promptly under each retaining voltage, bicycle need not apply the manpower driving can be stabilized in a certain common speed, during acceleration, need carry out manpower and driven by power simultaneously when level road travels.For guaranteeing that improved bicycle do not lose the base speed characteristic of unpowered vehicle, the maximum speed of electric power independent drive is adjusted to below the 20km/hr.This moment, the power consumption of whole boosting mechanism was not more than 25W.In addition, added a source switch with bicycle rear brake system interlock between power supply ［ 5 ］ and the regulating circuit ［ 8 ］, when bicycle rear was implemented braking, it had good braking ability with the coil automatic cutout of power supply and boosting mechanism to guarantee bicycle.

Because the utility model has taken into full account commercialization and the Chinese restriction that has transportation condition now in the theory and structure design, particularly uses the efficient that iron boron powerful permanent body has improved Electricity and machine conversion, expectation will have reasonable promotion prospect.

Claims

1, one is equipped with iron-core coil [1] on vehicle frame, at the vehicle wheel spoke outer end polylith permanent magnet [4] is housed, and have the electromagnetic booster bicycle of corresponding storage battery [5] power supply and voltage regulator control circuit [8], it is characterized in that the mutual action in the magnetic field of being realized with magnetic field of permanent magnet on the week of wheel garden and iron-core coil is the formed bicycle electromagnetic booster of a principle mechanism under control circuit.

2, by the described electromagnetic booster bicycle of claim 1, it is characterized in that polylith permanent magnet ［ 4 ］ being housed, comprise being fixed on the rim permanent magnet and other position of spoke at the vehicle wheel spoke outer end.

3, by the described electromagnetic booster bicycle of claim 1, it is characterized in that having one, comprise a plurality of iron-core coil devices ［ 1 ］.