CN2812389Y

CN2812389Y - Wheel-hub motor for electric bicycle

Info

Publication number: CN2812389Y
Application number: CN 200520012940
Authority: CN
Inventors: 徐科科
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-01
Filing date: 2005-07-01
Publication date: 2006-08-30
Anticipated expiration: 2015-07-01

Abstract

The utility model relates to a wheel-hub motor for an electric bicycle, which comprises a wheel-hub and a motor part arranged in the wheel-hub, wherein the motor part is composed of two minityped motors which are connected in series together; the output ends of the two motors are in transmission connection with the wheel-hub through one reducing gear. The reduction gear comprises two dirving gears which are fixed on output shafts of the two motors and rotate in the same direction; the two driving gears are engaged with a big gear of a duplicate gear fixed on a central shaft; a pinion of the duplicate gear is engaged with three drive gears which are uniformly distributed according to an angle of 120 DEG; the three drive gears are simultaneously engaged with an inner ring gear on a wheel-hub end cover; the wheel-hub end cover is rotationally connected with the central shaft and is integrally coupled with a wheel-hub. The utility model has the advantages of simple structure, small current, big torque, electricity saving, long lifetime, etc.

Description

Electric bicycle hub motor

Technical field

The utility model relates to a kind of motor, particularly relates to a kind of wheel hub motor that is used on the electric bicycle.

Background technology

Be used for the wheel hub motor that motor vehicle drives and compare, have compact conformation, characteristics such as volume is little, the kind of drive is simple, transmission efficiency height, and other useful spaces that do not need to take vehicle are arranged the installation drive motors with common electric machine with rotating speed.Wheel hub motor has generally been adopted in the driving of current electric bicycle and electric wheel-chair vehicle.

Existing electric bicycle hub motor generally is divided into two big classes: a class is the low-speed direct driving type, and another kind of is to adopt high speed acceleration and deceleration machine structural type.Low-speed direct driving type motor, because number of poles is many, speed ratio is lower, peak power output is little, electric current is big, height heats up, thereby in starting, increase load and when road gradient was steep, it was slower the motor reaction to occur, sometimes even the motionless phenomenon of electric bicycle motor band can occur and take place.Adopt the electric bicycle motor of high speed acceleration and deceleration machine structure, then show as controller complexity, cost height, reliability is low and electric current is big, the defective of the little grade of starting torque.Existing in addition motor adopts permanent magnetism to make rotor, and the magnet steel demagnetization that comes off easily can reduce the service efficiency of motor greatly.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of simple and reasonable for structure at above-mentioned prior art present situation, and electric current is little, moment of torsion is big, the electric bicycle hub motor of power saving and long service life.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this electric bicycle hub motor, include wheel hub and be located at the motor component of wheel hub inside, it is characterized in that described motor component is made of two micromachines that are cascaded, the output of two motors is in transmission connection through a deceleration device and described wheel hub.

Described deceleration device can comprise two driving gears that rotate in the same way that are fixed on two motor output shafts, two driving gears and one are fixed in the gear wheel engagement of the duplicate gear on the central shaft, and the pinion of duplicate gear and three are by 120 ° of equally distributed travelling gears engagements, three travelling gears again simultaneously with wheel hub end housing on the ring gear engagement, wheel hub end housing is rotatably connected on the central shaft and with wheel hub and is coupled to one.

The carbon brush length of described micromachine increases, and magnet steel adopts the ventional loudspeakers magnet steel.

Compared with prior art, advantage of the present utility model is:

1, electric current is little owing to adopt two micromachine (DC permanent magnet) work that are series at together, and rotor is with equidirectional, the running of identical speed, rotating speed height;

2, moment is big obtains sizable output torque after deceleration device slows down, and operating current is little, bigger more than 50% than existing motor torque after tested, therefore starting power, grade climbing performance, the overload power of electric bicycle is improved greatly;

3, power saving is owing to operating current, starting current all are less than existing motor, and therefore under equal conditions comparable existing motor multirow is sailed 30% distance;

4, simple in structure, cost is low falls 40% on a year-on-year basis than existing motor;

5, long service life has been owing to done improvement to existing micromachine, the carbon brush that extended, thereby make big leap ahead in useful life of motor;

6, this motor does not adopt rare earth, permanent magnetism, magnet steel (this magnet steel has serious demagnetization phenomenon), and adopts the ventional loudspeakers magnet steel, so never demagnetization after motor heats up, uses some cycles and can not reduce efficiency of motor because of the magnet steel demagnetization.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is a profile schematic diagram of the present utility model (removing bonnet).

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in Figure 1-Figure 3, electric bike wheel hub motor of the present utility model mainly comprises wheel hub 1, the micromachine 8 (DC permanent magnet) with central shaft 6 symmetric arrangement of two same structures is equipped with in wheel hub inside, and this micromachine 8 has been done improvement on the basis of existing structure, length lengthening with carbon brush, thereby prolonged the useful life of motor, and the magnet steel of motor adopts the ventional loudspeakers magnet steel, makes motor can not reduce efficiency of motor because of the magnet steel demagnetization.Be fixed with a driving gear 2 on the output shaft of two micromachines respectively, when motor rotated, two driving gears 2 rotated with equidirectional, same rotational speed.

Central shaft 6 is arranged on the center of wheel hub 1, and wheel hub can rotate around this central shaft.On this central shaft 6, be fixed with a duplex gear 3, wherein two driving gears, 2 engagements on the gear wheel 31 of this duplicate gear and the motor output shaft, the pinion 32 of duplicate gear then meshes with three travelling gears 4, these three travelling gears 4 are fixed on the inside of wheel hub 1 by two fixed heads 7, evenly distribute with 120 °.And three travelling gears 4 mesh with the ring gear 51 of processing on wheel hub end housing 5 simultaneously.This wheel hub end housing 5 is rotatably connected on the central shaft 6 by bearing, and fastening with screw and wheel hub 1.

When this electric bicycle hub motor rotates when two micromachines 8, two driving gears 2 on the motor output shaft rotate with equidirectional, same rotational speed, the gears at different levels of driven gear group slow down step by step, and then driving and 1 rotation of wheel hub end housing 5 connection all-in-one-piece wheel hubs, utilization is slowed down to increase and is turned round principle, thereby obtains sizable output torque.

Claims

1, a kind of electric bicycle hub motor, include wheel hub (1) and be located at the motor component of wheel hub inside, it is characterized in that: described motor component is made of micromachine (8) two same structures and that be series at together, and the output of two motors is in transmission connection through a deceleration device and described wheel hub.

2, electric bicycle hub motor as claimed in claim 1, it is characterized in that: described deceleration device comprises two driving gears (2) that rotate in the same way that are fixed on two motors (8) output shaft, two driving gears (2) and one are fixed in gear wheel (31) engagement of the duplicate gear on the central shaft (6), and the pinion of duplicate gear (32) meshes by 120 ° of equally distributed travelling gears (4) with three, three travelling gears (4) again simultaneously with wheel hub end housing (5) on ring gear (51) engagement, wheel hub end housing (5) is rotatably connected on central shaft (6) and goes up and be coupled to one with wheel hub (1).

3, electric bicycle hub motor as claimed in claim 1 or 2 is characterized in that: the carbon brush length lengthening of described micromachine (8).

4, electric bicycle hub motor as claimed in claim 1 or 2 is characterized in that: the magnet steel of described micromachine (8) adopts the ventional loudspeakers magnet steel.