CN2316763Y

CN2316763Y - Stock-type permanent-magnet dc electric machine

Info

Publication number: CN2316763Y
Application number: CN 97241901
Authority: CN
Inventors: 钱东升; 唐伟人; 方镜石
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-15
Filing date: 1997-10-15
Publication date: 1999-04-28
Anticipated expiration: 2007-10-15

Abstract

The utility model relates to a wheel hull type permanent-magnet DC electrical machine which is mainly applied to the manufacture of electric bicycles. The utility model adopts a rotary outer shell structure, an iron core is fixed to the inner wall of the outer shell, and an armature winding is embedded in a groove of the iron core; a commutator is fixed in one end cover of the electrical machine, and a permanent magnet is glued on a soft magnetic loop which is fixed to a brush holding frame; the brush holding frame is fixed to a shaft, an electric brush is in axial contact with the commutator and a rotor is connected with a stator by a rolling bearing. In the utility model, neither any mechanical speed changing mechanism nor any transmission mechanism is needed. The utility model has the advantages of low noise and long service life; the utility model not only be can used for assembling an electric bicycle, but also can be used as a matching electrical machine for an electric motorbike, an electric minicar, a small wind-driven generator and a small hydroelectric generator.

Description

Wheel shell-type permanent magnet DC motor

The utility model is a kind of shell-type permanent magnet DC motor of taking turns, and is mainly used in the manufacturing of city electric bicycle, belongs to electric class technical field of motors.

Along with socioeconomic growing, country more and more payes attention to the environmental protection cause, and people's agenda has been mentioned in the two pollution problems of waste gas, noise that solve the urban motor vehicle.Once rise city electric bicycle heat the eighties, owing to existing some defectives to fail to be used widely in motor and the storage battery design.Existing in the market hub direct current machine has the brush DC class from its structure, divide photo-electric control, hall sensing, variable frequency control, and they all have common defective, and promptly starting torque is little, efficient is low and the cost height; And the DC brush disc-type machine is the wheel shell motor that has the gear reduction transmission mechanism, and its efficient is lower, and heat dispersion is poor, because the motor high speed rotating makes wear of brush bigger.

Goal of the invention of the present utility model is at market the demand of electric bicycle and the defective of prior art application; design a kind of wheel shell-type permanent magnet DC motor that is applicable to that bicycle is made; make its volume not only simple in structure little; it is big also to have moment; the advantage that life-span is long can substitute existing combustion gas power assist vehicle with the protection environment.

For realizing such goal of the invention, the utility model adopts the outer housing rotary type structural design, and rotor comprises iron core, armature winding, commutator, left and right sides two end cap and bearing.Iron core is fixed on casing inner wall, and iron core slot is embedded with armature winding, and commutator is fixed in the end cap of motor, can be in left end cap, also can be in right end cap, left and right sides two end cap and casing bolt.Stator is made up of axle, permanent magnet, soft magnetism ring, brush, brush holder yoke, and a watt shape permanent magnet is bonded on the soft magnetism ring, and the soft magnetism ring is fixed on the brush holder yoke, and brush holder yoke is keyed on the axle, and brush is installed in the brush holder yoke, with commutator for axially to contact.Rotor adopts rolling bearing with being connected of stator, and power supply wiring is drawn from the mesopore of stator axis.

Fig. 1 is a structural representation of the present utility model.

As seen, electric machine iron core 6 is fixed on the inwall of casing 7 in the rotor among the figure, and iron core slot is embedded with armature winding 5, and commutator 4 is fixed in the motor left end cap 3, and left end cap 3 and right end cap 10 are used bolt with casing 7.In the stator, watt shape permanent magnet 8 is bonded on the soft magnetism ring 9, soft magnetism ring 9 is fixed on the brush holder yoke 12, brush holder yoke 12 usefulness keys 13 are fixed on the axle 1, brush 11 is installed in the brush holder yoke 12, axially contact for 4 one-tenth with commutator, rotor is connected with stator with 14 by rolling bearing 2, and power supply wiring is drawn from the mesopore of stator axis 1.

The utility model is simple in structure, owing to adopted the outer housing rotary type structure, armature, iron core are directly installed on the motor housing, helps the armature winding heat radiation, has improved motor usage factor and efficient; Owing to adopt commutator and brush for axially to contact, and brush, brush holder yoke be arranged in the stator, shortened axial length, reached the installation dimension with the supporting wheel shell mould motor of car load; Adopt electronic stepless speed regulation, directly be contained in without any need for mechanical speed change or transmission mechanism and come powered vehicle to travel in the wheel, noise is low, and the life-span is long, and is energy-efficient, easy to use, is easy to popularize.

In an embodiment of the present utility model, adopt electric machine structure design as shown in Figure 1, and employing rare earth ferromagnetic material is that magnetic field makes the volume of motor very little, its overall dimensions are Φ 218*105mm, moment is big, can zeroly start, and adopts stepless speed regulation, rotating speed is 180 rev/mins, no-load current is little, is 0.3A, and operating voltage is 36V, overload capacity is 3 times of rated power, and efficient reaches more than 80%.Because the rotating speed of design is low, prolong the useful life of its brush greatly, can reach more than 40,000 hours.Result of the test shows that the utility model motor is installed on 24 cun bicycles, behind the sufficient power supply of lead-acid battery with 36 volt of 7 ampere-hour, travels 29.5 kilometers with 22 kilometers speed per hour, does not have the sense of noise.

The utility model not only can be contained on the ordinary bicycle, connect storage battery and electronic speed regulation controller, just dress up an electric bicycle immediately, simultaneously can also be as all kinds of adapted motors such as battery-operated motor cycle, electronic minicar, wind-force, the supporting small generator of waterpower and automation transmission series.

Claims

1, a kind of shell-type permanent magnet DC motor of taking turns, comprise rotor and stator, it is characterized in that adopting the outer housing rotary type structure, electric machine iron core 6 is fixed on the inwall of casing 7, iron core slot is embedded with armature winding 5, commutator 4 is fixed in the electric motor end cap, left end cap 3 and right end cap 10 are used bolt with casing 7, permanent magnet 8 is bonded on the soft magnetism ring 9, and soft magnetism ring 9 is fixed on the brush holder yoke 12, and brush holder yoke 12 usefulness keys 13 are fixed on the axle 1, brush 11 is installed in the brush holder yoke 12, axially contact for 4 one-tenth with commutator, rotor is connected with stator with 14 by rolling bearing 2, and power supply wiring is drawn from the mesopore of stator axis 1.