CN201750242U

CN201750242U - Motor

Info

Publication number: CN201750242U
Application number: CN2010202419337U
Authority: CN
Inventors: 张强; 谭志勇
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Optoelectronic Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Microtech Changzhou Co Ltd; AAC Optoelectronic Changzhou Co Ltd; AAC Technologies Holdings Inc
Priority date: 2010-06-29
Filing date: 2010-06-29
Publication date: 2011-02-16
Anticipated expiration: 2020-06-29

Abstract

The utility model provides a motor comprising a rotating shaft and a rotor rotating around the central axis of the rotating shaft; the rotor comprises a permanent magnet, and the center of mass of the permanent magnet has a certain distance away from the central axis of the rotating shaft. As the center of mass of the permanent magnet of the motor deviates from the central axis of the rotating shaft, the permanent magnet can realize eccentric vibration, therefore, the mass eccentricity of the rotor can be achieved without additionally arranging a mass block. Therefore, the motor needs fewer parts, has simple structure, and has small rotational inertia and quick starting speed due to the reduction of the entire mass of the rotor caused by reduction of parts.

Description

Motor

[technical field]

The utility model relates to a kind of motor, especially relates in the motor structure as the permanent magnet of rotor purposes.

[background technology]

The portable consumer electronic product as mobile phone, handheld device, guider or palm multimedia entertainment equipment etc., generally can be used vibrating motor and do system feedback, such as the incoming call prompting of mobile phone, vibrational feedback of game machine or the like.

The motor of dependency structure as shown in Figure 6, this motor comprises rotor assembly 60, stator module 61, rotating shaft 62 and bearing 63 and encapsulates the housing 64 and the circuit board 65 of above element.Be embedded with coil 610 on the stator module 61, it is fixed on the circuit board 65, rotor assembly 60 includes a substrate 600, on substrate 600, be provided with the circular permanent magnet 601 that is attached thereto, substrate and permanent magnet are passed in rotating shaft 62, substrate and permanent magnet rotate around the rotating shaft central shaft, for producing eccentric vibration, described rotor assembly 60 also must comprise a weighting block 602, this weighting block 602 is positioned at the outside of permanent magnet 601, is fixed on the substrate 600, thereby makes mass centre's (abbreviation barycenter) of whole rotor assembly depart from the center line of rotating shaft, cause rotor assembly to center on rotating shaft and produce eccentric vibration, realize the motor oscillating function.Yet the rotor assembly 60 required parts of this structure are many, and cost is also higher relatively, and total quality is heavy, causes moment of inertia bigger, and under the driving of constant driving, the toggle speed of rotor assembly is slow.

Thereby, be necessary to study a kind of rotor part of new structure.

[utility model content]

The technical problem that the utility model need solve is to overcome above-mentioned deficiency, and a kind of simple in structure, cost is low, toggle speed is fast motor is provided.

According to above-mentioned technical problem, designed a kind of motor, comprise rotating shaft and the rotor that rotates around rotating shaft, described rotor comprises a permanent magnet, the barycenter of described permanent magnet and the central shaft of rotating shaft are at a distance of certain distance.

Further improve as the utility model, described permanent magnet comprises continuous first and second portion, and the quality of first is greater than second portion.

Further improve as the utility model, described first is a semicircular ring, and described second portion also is a semicircular ring.

Further improve as the utility model, the center of circle of described first and the center of circle of second portion overlap.

Further improve as the utility model, the internal diameter of described first is less than the internal diameter of second portion,

Further improve as the utility model, the external diameter of described first is greater than the external diameter of second portion.

Further improve as the utility model, described rotor also comprises a substrate, and described rotor is connected on the pole plate.

Further improve as the utility model, described substrate is circular, and permanent magnet places in the external diameter scope of substrate fully, and the described substrate center of circle is positioned on the described centre of rotor axle.

Further improve as the utility model, described substrate is circular, and its external diameter equals the external diameter of permanent magnet first semicircular ring, and the first semicircular center of circle is aimed in the center of circle.

Because mass centre's (being barycenter) of permanent magnet of the present utility model departs from the central shaft of rotating shaft, thereby this permanent magnet also can be realized eccentric vibration, need not set up other mass again and realize rotor quality off-centre, so, the required parts of the utility model are few, and are simple in structure, and, parts reduce, cause the rotor total quality and reduce, thereby rotator inertia is few, toggle speed is fast.

[description of drawings]

Fig. 1 is the schematic perspective view of the utility model motor;

Fig. 2 is the complete section schematic diagram of Fig. 1;

Fig. 3 is the three-dimensional exploded view of the utility model motor;

Fig. 4 is the three-dimensional exploded view at another visual angle of the utility model motor;

Fig. 5 is the front schematic view of the utility model permanent magnet;

Fig. 6 is the three-dimensional exploded view of associated motor.

[embodiment]

The utility model is described in further detail below in conjunction with drawings and embodiments.

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, be a kind of execution mode of the present utility model, be a kind of brushless electric machine 1.

This brushless electric machine 1 comprises that winding becomes the lid 10 and the base 11 of shell.Be provided with rotor 12, stator 13 and rotating shaft 14, bearing 15 in the enclosure.For power supply is provided, on the chassis outer side face, also be embedded with conducting terminal 16.

At execution mode, this stator 13 includes a pallet 130, is fixed in coil 131 and other electronic devices and components on the pallet 130.This pallet 130 links to each other with base 11, is located on the base 11.In addition, this pallet also can be used as the base that forms shell.

Rotor 12 includes a substrate 120 and a permanent magnet 121.This substrate 120 is the circular of rule, and the through hole at its center is used for rotating shaft 14 and passes, and also by the center of circle of substrate 120, promptly the center of circle of substrate 120 is positioned on the central shaft of rotor 14 central shaft of rotating shaft 14.

This permanent magnet 121 is irregularly shaped, and its barycenter departs from the central shaft of rotating shaft 14, with the rotating shaft central shaft at a distance of an end distance from.As shown in Figure 5, this permanent magnet 121 comprises the first semicircular ring 121a and the second semicircular ring 121b, and the internal diameter of first semicircular ring is littler than second semicircular ring, first semicircular ring outer big through outer warp than second semicircular ring, and the quality of first semicircular ring is greater than second semicircular ring.The G point is the barycenter of this permanent magnet among the figure, and the O point is its pivot, i.e. the point of the central shaft of rotor 14 and permanent magnet place Plane intersects.The G point departs from the O point, at a distance of a segment distance.

Two semicircular ring is continuous, composition is irregular, the center of circle of 121, two semicircular ring of permanent magnet of similar ring-type coincides together.Permanent magnet 121 is fixed on the substrate 120, and when both were continuous, the center of circle of substrate was aimed at the center of circle of first semicircular ring, and the external diameter of substrate equals the external diameter of first semicircular ring, thereby permanent magnet is placed in the external diameter of substrate 120 fully.

Also be provided with bearing 15 at substrate 120 centre bores, this rotation axis passes substrate 120, permanent magnet 121 and bearing 15.When providing the signal of telecommunication for motor, rotor (both substrate and permanent magnet) rotates around the central shaft of this rotation axis.Because the barycenter of permanent magnet departs from rotation axis, thereby rotor produces eccentric vibration around rotation axis.

The utility model utilizes the irregular shape of permanent magnet, make its mass centre depart from the central shaft of rotating shaft, thereby, need not set up other mass again and realize eccentric vibration, so, the required parts of the utility model are few, and are simple in structure, and, parts reduce, cause total quality and reduce, thereby rotator inertia is few, toggle speed is fast.

Above-described only is execution mode of the present utility model; should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model creation design; can also make improvement, but these all belong to protection range of the present utility model.

Claims

1. a motor comprises rotating shaft and the rotor that rotates around rotating shaft, and described rotor comprises a permanent magnet, it is characterized in that: the barycenter of described permanent magnet and the central shaft of rotating shaft are at a distance of certain distance.

2. motor according to claim 1 is characterized in that: described permanent magnet comprises continuous first and second portion, and the quality of first is greater than second portion.

3. motor according to claim 2 is characterized in that: described first is a semicircular ring, and described second portion also is a semicircular ring.

4. motor according to claim 3 is characterized in that: the center of circle of described first and the center of circle of second portion overlap.

5. according to claim 3 or 4 described motors, it is characterized in that: the internal diameter of described first is less than the internal diameter of second portion,

6. according to claim 3 or 4 described motors, it is characterized in that: the external diameter of described first is greater than the external diameter of second portion.

7. motor according to claim 1 is characterized in that: described rotor also comprises a substrate, and described rotor is connected on the pole plate.

8. motor according to claim 7 is characterized in that: described substrate is circular, and permanent magnet places in the external diameter scope of substrate fully, and the described substrate center of circle is positioned on the described centre of rotor axle.