CN2285025Y

CN2285025Y - Combined magnetic-pole permanent-magnet dc starting motor

Info

Publication number: CN2285025Y
Application number: CN 96229513
Authority: CN
Inventors: 沈海根; 丁庆成
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-25
Filing date: 1996-03-25
Publication date: 1998-06-24
Anticipated expiration: 2006-03-25

Abstract

The utility model relates to a combined magnetic pole and permanent magnet DC starting motor, which is widely used for starting an internal combustion engine, and an accumulator is used as a power supply. After the internal combustion engine is started, the internal combustion engine is disengaged from a starting motor by special equipment, and the motor stops work. The structure of the combined magnetic pole and permanent magnet DC starting motor is similar to the structure of an ordinary permanent magnet DC starting motor, and has the main differences that a combined magnetic pole is composed of a permanent magnet 15 and soft magnet pieces 14, and the utility model has the advantages of large starting torque, high working speed, high starting speed, small starting current, long service life, small consumption of permanent magnet steel, small size of the motor, etc. A reducer casing attached to the starting motor is possibly eliminated.

Description

A kind of composite poles DC starting motor

The utility model relates to the DC starting motor of a kind of special permanent magnetic circuit system, can be widely used in the starting of internal combustion engine, as motorcycle, automobile, tractor, gasoline engine, diesel engine etc., make startup power supply with storage battery, make internal combustion engine and starter break away from coupling by isolated plant behind engine starting, motor quits work.

Along with development of market economy, China's internal combustion engine annual production has reached ten million platform, and wherein the motorcycle annual production has broken through 9,000,000, uses DC motor starting motorcycle mostly.But the products such as the most of import of motorcycle starting motor Japan, Korea S and Taiwan of present domestic market, home made article is Counterfeit Item mostly, technology is more outmoded, the magnetic pole of starting motor adopts the magnetic ferrites permanent magnet, the electric excitation of a spot of employing, thereby have that volume is big, Heavy Weight, electric current is big, torque is little, use the longevity with shortcoming such as short, some product is also had to an additional reduction box to increase torque.

The purpose of this utility model is at above-mentioned shortcoming, design a kind of composite poles DC starting motor of special magnetic circuit system, the difference of this motor and conventional DC starting motor is the composite poles that the main pole of permanent magnetic circuit system adopts permanent magnet and soft magnetism iron plate to be combined into, the permanent-magnet steel of permanent magnet is selected and is used Fe-B rare-earth permanent magnet, its magnetic energy product is about 10 times of magnetic ferrites permanent magnet, improved the air gap flux density of motor, thereby it is big to have a torque, volume is little, in light weight, electric current is little, priming speed is fast, long service life, and can save the advantage of permanent-magnet steel use amount etc., can also keep original profile and installation dimension, abolish the reduction box that is attached on the starting motor under the conditions such as power energy parameter.

Accompanying drawing has provided embodiment of the present utility model, is described further in conjunction with the accompanying drawings now:

Fig. 1 is the vertical cross-sectional schematic of a kind of composite poles DC starting motor structure.

Fig. 2 is the composite poles structural representation.

Fig. 3 is another kind of composite poles structural representation.

With reference to Fig. 1, a kind of composite poles DC starting motor is made up of rear end cap 1, rear bearing 2, brush box assembly 3, commutator 4, armature winding 5, composite poles 6, rotor core 7, casing 8, front end housing 9, fore bearing 10, sealing ring 11, sealing ring 12, rotating shaft 13.The shaft extension end of rotating shaft 13 is provided with garden post tooth, to drive internal combustion engine.Rotating shaft 13 tight fits are pressed into rotor core 7, commutator 4, armature winding 5 is made in rotor core 7 by high strength enamelled wire, brush box assembly 3 is made up of brush box, brush, three parts of spring, and the spring handle brush in the middle of the brush box assembly 3 is pressed on the outer garden of commutator 4.Fore bearing 10 is inlaid in the front end housing 9, and rear bearing 2 is inlaid in the rear end cap 1, and front end housing 9, rear end cap 1 usefulness stay bolt are fixed with casing 8.Composite poles 6 sticks on the inwall of casing 8.

With reference to Fig. 2, I-I among Fig. 1 is to A-A type composite poles 6, form by a soft magnetism iron plate 14 and a watt shape permanent magnet 15, soft magnetism iron plate 14 is arranged side by side with permanent magnet 15, its position is in face of rotor direction of rotation one side, be fixed on the inwall of casing 8 with high-strength adhesive, and strengthen fixingly with mechanical means, require under 130 ℃ of high temperature and vibration condition, not to be subjected to displacement.

With reference to Fig. 3, the I-I among Fig. 1 is made up of a soft magnetism iron plate 14 and a watt shape permanent magnet 15 of splitting one jiao to B-B type composite poles 6, and soft magnetism iron plate 14 is identical with installation situation and Fig. 2 of permanent magnet 15.

Permanent magnet 15 adopts the sintering type Nd iron boron rare earth magnetic steel usually, and with the machine-shaping of line cutting way, the soft magnetism iron plate adopts No. 10 steel car systems to form usually.

Claims

1, a kind of composite poles DC starting motor of being made up of permanent magnet and soft magnetism iron plate is characterized in that composite poles 6, is made up of permanent magnet 15, soft magnetism iron plate 14.

2, according to the described a kind of composite poles DC starting motor of claim 1, it is characterized in that permanent magnet 15 and soft magnetism iron plate 14 are arranged side by side, be fixed on the inwall of casing 8 with high-strength adhesive, soft magnetism iron plate 14 is installed in face of rotor direction of rotation one side.