CN2706950Y

CN2706950Y - Hollow cup motor

Info

Publication number: CN2706950Y
Application number: CN 200420041368
Authority: CN
Inventors: 韩勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-16
Filing date: 2004-06-16
Publication date: 2005-06-29
Anticipated expiration: 2014-06-16

Abstract

The utility model discloses a hollow cup motor, provided with a casing. One end of the casing is provided with a brush assemble; the interior of the casing is provided with a motor stator and a motor rotor comprising a central shaft, a permanent magnetism magnet, a bearing, a central frame, a coil, a collector, etc. The hollow cup motor is characterized in that the outer of the coil is provided with soft magnetic materials which can form a magnetic circuit. The magnetic circuit in the motor can be changed through the soft magnetic materials added by the utility model, the loss of the magnetic force is reduced, the phenomenon of leakage is reduced, the output power is increased, and the work efficiency of the motor is improved.

Description

A kind of drag cup motor

Technical field

The utility model relates to a kind of micro-machine, is a kind of drag cup motor specifically.

Background technology

The drag cup motor generally is applied to clock and watch, in the commodity such as mobile phone, the structure of existing cylindrical shape drag cup motor is general as Fig. 4, shown in Figure 5, magnetic circuit during its work is another utmost point of the gap → Zhongdao permanent magnetic iron 10 of 10 of gap → coil 2 → coil 2 of 2 of shell 1 from the gap → shell 1 of 1 on gap → coil 2 → coil 2 of 2 of one utmost point of permanent magnetic iron 10 → permanent magnetic iron 10 and coils and shell → pass shell 1 to correspondence and coils and permanent magnetic irons, shortcoming is, magnetic flux by coil significantly decreases, lower efficiency, particularly as shown in Figure 5 eccentric wheel 13 is fixed on the built-in vibrating motor of eccentric wheel on coil 2 outer walls, because of it shell and coil between hypertelorism, cause the magnetic gap spacing excessive, leakage field is serious, and the efficient of motor reduces excessive.In recent years along with commodity such as clock and watch, mobile phone develop to miniaturization gradually, the volume of drag cup motor is also more and more littler thereupon, its power output also reduces thereupon, and its defective that exists above-mentioned leakage field or magnetic flux to reduce again, therefore existing drag cup motor does not satisfy the desired small size of businessman, power output, demand easy for installation greatly at all.

Summary of the invention

The purpose of this utility model is intended to overcome the shortcoming of above-mentioned prior art, and a kind of simple in structure, drag cup motor that power output is big, easy for installation is provided.

The technical solution of the utility model is: a kind of drag cup motor, it has shell, end at shell is provided with the brush combination, be provided with motor stator and the motor rotor formed by central shaft, permanent magnetic iron, bearing, centre frame, coil, commutator etc. in the enclosure, characteristics are to be provided with the soft magnetic material that forms magnetic circuit in the coil outside.

Requirement to soft magnetic material is the magnetic permeability height, coercive force is little, saturation magnetization is big, can use Armco iron, silicon steel, iron-nickel alloy, ferroaluminium, ferrocobalt or the like material.Consider and produce and cost that it is the adhesive tape of base that soft magnetic material of the present utility model can adopt Armco iron or mild steel.

The utility model adds the soft magnetic material that forms magnetic circuit in the outside of coil, its objective is and reduce magnetic circuit path length, make magnetic circuit become soft magnetic material on the gap → coil → coil outer wall of one utmost point → permanent magnetic iron from permanent magnetic iron and coil → pass soft magnetic material to the soft magnetic material of correspondence and the gap the gap → coil between coil → coil and the permanent magnetic iron → finally arrive another utmost point of permanent magnetic iron, the obvious like this magnetic force loss that reduced, increase the power output of motor, improved operating efficiency.

Below in conjunction with drawings and Examples the utility model is elaborated.

The structural representation of Fig. 1-a kind of embodiment of the present utility model;

The structural representation of Fig. 2-second kind of embodiment of the present utility model;

The structural representation of Fig. 3-the third embodiment of the present utility model;

The structural representation of the cylindrical shape drag cup motor of Fig. 4-prior art;

The structural representation of the built-in vibrating motor of eccentric wheel of Fig. 5-prior art.

The explanation of accompanying drawing drawing:

1 shell, 2 coils, 3 central shafts, 5 bases, 6 brushes, 7 commutators, 8 bearings, 9 centre frames, 10 permanent magnetic irons, 11 bearing holder (housing, cover)s, 12 terminals, 13 eccentric wheels, 14 soft magnetic materials.

Specific embodiments

Embodiment 1, with reference to figure 1, basic identical with the structure of existing drag cup motor, it has by cylindrical housing 1, the bearing holder (housing, cover) 11 that is fixed on shell 1 center and bearing 8, is fixed on the stator that the permanent magnetic iron 10 of bearing holder (housing, cover) 11 outsides is formed, by central shaft 3, be fixed on centre frame 9, commutator 7 on the central shaft 3, be fixed on the rotor that the coil 2 on the commutator 7 is formed, brush combination by brush 6, base 5, terminal 12 are formed fixedly installs the soft magnetic material 14 that is made by the irony adhesive tape on the outer wall of coil 2.When motor operations, form magnetic gap like this, reduced the loss of magnetic flux, improved power output by the soft magnetic material 14 on permanent magnetic iron 10 and coil 2 exterior wall.

This example is suitable to be applied on the products such as clock and watch, toy, micromachine.

Embodiment 2, with reference to figure 2, basic identical with the structure of example 1, it has the stator of being made up of cylindrical housing 1, bearing holder (housing, cover) 11, bearing 8, permanent magnetic iron 10, the rotor of forming by central shaft 3, centre frame 9, commutator 7, coil 2, the brush of being made up of brush 6, base 5, terminal 12 makes up, on the outer wall of coil 2, fixedly install the soft magnetic material 14 that makes by the irony adhesive tape, difference is, on the outer wall of the soft magnetic material 14 of coil 2 one sides, be fixed with eccentric wheel 13, form the built-in vibrating motor of a kind of eccentric wheel.In like manner, when motor operations, magnetic circuit is from a utmost point of permanent magnetic iron 10, soft magnetic material 14 on gap → coil 2 → coil 2 outer walls of permanent magnetic iron 10 and coil 2 → pass soft magnetic material 14 to gap → coil 2 → coil 2 of 2 of corresponding soft magnetic material 14 and coils and the gap between the permanent magnetic iron 10 → finally arrive another utmost point of permanent magnetic iron 10, overcome in original technology owing to hypertelorism between shell 1 and the coil 2, cause excessive and the problem that leakage field is serious of magnetic gap spacing, reduce the wastage, increase power output, improve the operating efficiency of vibrating motor.

This example is suitable to be applied on the mobile phone.

Embodiment 3, with reference to figure 3, it is a kind of novel drag cup vibrating motor, with I on May 29th, 2004 application, application number " 200420040874.1 ", the structure of title " a kind of drag cup vibrating motor " is basic identical, it has by cylindrical housing 1, be fixed on the central shaft 3 of center in the shell 1, directly be fixed on the stator that the permanent magnetic iron 10 on the central shaft 3 is formed, by the centre frame 9 that is located at central shaft 3 other ends, be fixed on the bearing 8 on the centre frame 9, bearing holder (housing, cover) 11, commutator 7, coil 2, the rotor that eccentric wheel 13 grades are formed, difference is to be provided with the soft magnetic material 14 that is made by the irony adhesive tape between coil 2 and eccentric wheel 13.

During work, because permanent magnetic iron directly is fixed on the central shaft, the permanent magnetic iron internal diameter is little, and magnetic field intensity is big, because the shielding action of soft magnetic material has reduced the leakage field phenomenon, reduce magnetic force loss again, the power output of motor improves, thereby the rotational frequency of rotor is accelerated increase vibration intensity of force.

Compare with example 2, the power output of this routine vibrating motor is bigger, and oscillation intensity is stronger, is suitable as very much the vibrator in the product such as mobile phone, satisfies the desired small size of businessman, big power output, demand easy for installation.

Claims

1, a kind of drag cup motor, it has shell (1), be provided with the brush combination at shell (1) one end, in shell (1), be provided with motor stator and the motor rotor formed by central shaft (3), permanent magnetic iron (10), bearing (8), centre frame (9), coil (2), commutator (7), it is characterized in that, be provided with the soft magnetic material (14) that forms magnetic circuit in coil (2) outside.

2, a kind of drag cup motor according to claim 1 is characterized in that, described soft magnetic material (14) is the adhesive tape of irony.